CN102703121B

CN102703121B - Biomass gas generation system

Info

Publication number: CN102703121B
Application number: CN2012100082445A
Authority: CN
Inventors: 徐欢
Original assignee: WUXI HUGUANG INDUSTRY FURNACE Co Ltd
Current assignee: WUXI HUGUANG INDUSTRY FURNACE Co Ltd
Priority date: 2012-01-12
Filing date: 2012-01-12
Publication date: 2013-12-18
Anticipated expiration: 2032-01-12
Also published as: CN102703121A

Abstract

The invention relates to a biomass gas generation system. The system comprises a feed device, a biomass gasification furnace, a post-treatment system and a gas transmission and storage pipeline system which are connected in a sequence of gas generation and treatment, wherein the biomass gasification furnace is provided with a fuel inlet and a gas outlet, the fuel inlet is connected with the feed device, and the gas outlet is communicated with the post-treatment system through a connecting pipe fitting; and the post-treatment system comprises a cyclone dust collector, a primary pipe-type intercooler, an electrical tar precipitator, a secondary pipe-type intercooler, a filter and purification device, a primary water-steam separator and a secondary water-steam separator. The biomass gas generation system has a smart and reasonable structure, cannot cause secondary pollution to the surrounding environment while biomass energy is reasonably utilized; and prepared gas can be applied to civil use instead of the conventional stove or liquefied gas, and can be applied to the industrial field, such as directly being used as industrial gas or being used for supplying power generation for power generation equipment.

Description

The biomass fuel gas generating system

Technical field

The invention belongs to biological fuel gas production unit technical field, specifically relate to a kind of biomass fuel gas generating system.

Background technology

Along with industrial develop rapidly and the propelled at high velocity of urbanization process, energy shortage, problem of environmental pollution has been the focus that society is paid close attention to.And exist already in the phenomenon of rural area crop straw burning and the old-fashioned wood stove of use, also discharge a large amount of dust and Wen Shi gas.The biomass energy waste is mainly agricultural waste material at present, wherein can be used as greatly energy purposes.In addition, the overwhelming majority in forestry and wood working waste also can be used as energy purposes.

The biological fuel gas of biomass gasifying furnace manufacture belongs to green novel energy source, and it has powerful vitality.The raw material produced due to biological fuel gas is agricultural crop straw, forest tree castoff, edible fungi residues, cattle and sheep animal manure and all inflammable substances, is a kind of inexhaustible renewable resource.Biological fuel gas can solve whole day life energy (cooking, heating, shower), and burns as liquefied gas, can change the mode of life that China's rural area smoke fire burns fully, can ban traditional bavin kitchen range fully, substitutes liquefied gas.In addition, biological fuel gas has more wide application prospect in industrial aspect, and it not only can directly use as industrial combustion gas, but also can supply with the use that generating set is done generating.

Biomass gasifying furnace is biological fuel gas production unit commonly used, but present biomass gasifying furnace is also in the starting stage, some small evaporator stoves are the easy blocked pipeline of tar and switch in use, there is emission of bad smell etc. used time, user due to the small evaporator stove relatively disperses simultaneously, it used the waste residue, the tar water that produce disorderly to fall, and caused secondary pollution.

Summary of the invention

The object of the invention is to overcome the deficiencies in the prior art, a kind of biomass fuel gas generating system is provided, and its structure is ingenious rationally, can be when rationally utilizing biomass energy, can not produce secondary pollution to surrounding enviroment, the combustion gas of preparation can directly apply to industrial generation.

According to technical scheme provided by the invention: the biomass fuel gas generating system, it is characterized in that: comprising: the feeding unit be connected successively with processing sequence by the combustion gas generation, biomass gasifying furnace, after-treatment system and gas transmission gas storage piping system, described biomass gasifying furnace has fuel inlet and gas outlet, the burning import is connected with feeding unit, and gas outlet is communicated with after-treatment system by connecting tube, described after-treatment system comprises cyclone dust collector, one-level tubular type inter cooler, electrical tar precipitator, secondary tubular type inter cooler, filtering and purifying, one-level moisture separator and second level moisture separator, the import of cyclone dust collector is connected with the gas outlet of biomass gasifying furnace by connecting tube, the outlet of cyclone dust collector is divided into two branch roads, by connecting tube, with the import of two one-level tubular type inter coolers, be connected respectively, the outlet of these two one-level tubular type inter coolers is connected with the import of same electrical tar precipitator by connecting tube respectively, the outlet of described electrical tar precipitator is divided into two branch roads, by connecting tube, with the import of two secondary tubular type inter coolers, be connected respectively, the outlet of these two secondary tubular type inter coolers is connected with the import of filtering and purifying by connecting tube respectively again, the outlet of described filtering and purifying is connected with the import of one-level moisture separator by connecting tube, the outlet of this one-level moisture separator is connected with the import of second level moisture separator by connecting tube, the outlet of this second level moisture separator connects gas transmission gas storage piping system again.

As a further improvement on the present invention, described biomass gasifying furnace comprises furnace binding, grey disc mechanism, goes out ash bucket, ash convenyer structure and admission passage;

Described furnace binding comprises urceolus, inner core, annular flange, the first ring flat-plate, the second ring flat-plate ash-stopping ring, scrapes hawk and water seal circle, inner core is placed in upper part of urceolus, edge, inner core upper end and edge, urceolus upper end are by the annular flange welded seal, pass through the first ring flat-plate welded seal between edge, inner core lower end and outer tube inner wall, form water jacket between inner tank theca and outer tube inner wall, be provided with on wall of the outer-rotor corresponding to the water-in of water jacket bottom with corresponding to the water return outlet on water jacket top; Lower part inner wall surface of described urceolus is provided with refractory heat-insulating wall body; Described the second ring flat-plate is weldingly fixed on edge, urceolus lower end, and ash-stopping ring and water seal circle coaxially arrange, and is welded on the second ring flat-plate bottom, and ash-stopping ring is interior, and the water seal circle outside; Polylith is scraped that hawk is welded on the ash-stopping ring inwall and is uniformly distributed along the circumferential direction of ash-stopping ring; Described body of heater middle part is provided with for adding the opening for feed of biomass fuel, and described opening for feed communicates with inner core inside, and described upper of furnace body is provided with for inputting the air outlet of biological fuel gas, and described air outlet communicates with inner core inside;

Described grey disc mechanism is arranged under furnace binding, and grey disc mechanism comprises water seal inner ring, water seal outer ring, base plate, chassis, gas-distributing pipe, blast cap assembly, keeps off grey cutter, water seal slotting tool, center ring flat-plate and grate; Water seal inner ring and water seal outer ring coaxially arrange, and jointly are welded on plate upper surface, between water seal inner ring and water seal outer ring, form annular seal-water tank, and the water seal circle of described bottom of furnace body inserts downwards in this annular seal-water tank; The inwall of described water seal inner ring is provided with a plurality of along the circumferential direction equally distributed bearings, and chassis is shelved on bearing and with bearing pin and is connected with bearing, and grate is placed on chassis; The center on described chassis is provided with through hole, and gas-distributing pipe is located in this through hole, the gas-distributing pipe top closure, and the perisporium on gas-distributing pipe top is provided with pore; Described blast cap assembly is sleeved on gas-distributing pipe and relies on the center ring flat-plate to support, and the center ring flat-plate is fixed on chassis, and the ventilation gaps in the blast cap assembly communicates with the pore on gas-distributing pipe; Gear ash cutter and the annular water seal slotting tool of annular coaxially arrange, and are welded on respectively on the lower surface of described base plate; The sidewall on top, described water seal outer ring is provided with upflow tube, under the upflow tube outlet, is provided with funnel, and the water in grey disc mechanism pressed on ring shape water sealed tank can flow into below downwards through funnel and go out in the annular seal-water tank on ash bucket;

Describedly go out ash bucket and be arranged under grey disc mechanism, go out ash bucket and comprise urceolus, inner core, flange and flanged pipe, urceolus and inner core are pyramidal structure, and their edge, upper end is weldingly fixed on the flange lower surface, be filled with heat-insulating heat-preserving material between urceolus and inner core, the inner core lower ending opening is ash output hole; Both sides on described urceolus and inner core are respectively arranged with flanged pipe, and the axle center of both sides flanged pipe is on same axis, and flanged pipe passes through for admission passage; Be welded with inner ring and the outer ring of coaxial setting on the upper surface of described flange, between inner ring and outer ring, form annular seal-water tank, this annular seal-water tank coordinates for the water seal slotting tool on the grey disc mechanism with top, realizes water-lute; Be provided with return water pipe on the annular seal-water tank sidewall, be provided with a plurality of along the circumferential direction equally distributed support running rollers in annular seal-water tank, described support running roller supports by its base, for the grey disc mechanism of rest top;

Described ash convenyer structure is arranged on out the ash bucket below, and the ash convenyer structure comprises bearing, housing, upper flange lid, lower flange lid, rotating shaft, the first sealed bearing assembly, the second sealed bearing assembly and driving mechanism; Described bearing has an inclination mounting face, and housing is arranged on the inclination mounting face, and the housing lower end is provided with opening up ash inlet, and this ash inlet is connected with the described ash output hole that goes out ash bucket, and the housing upper end is provided with downward opening ash output hole; Described housing is double-deck water jacket housing, and bottom, housing lower end is provided with water-in, and top, housing upper end is provided with water outlet; Described housing upper end is equipped with the upper flange lid, lower end is equipped with the lower flange lid, rotating shaft is arranged in housing, the rotating shaft upper end is arranged on upper flange by the first sealed bearing assembly support and covers, the rotating shaft lower end is arranged on lower flange by the second sealed bearing assembly support and covers, rotating shaft drives rotation by driving mechanism, and rotating shaft is provided with the flight for delivery of lime-ash;

Described admission passage comprises blower fan, check valve, the first tracheae, high temperature resistant tracheae and main tracheae; The air outlet of blower fan is connected with the blast inlet of check valve, and the air outlet of check valve is connected with the first tracheae one end, and the first tracheae the other end is connected with high temperature resistant tracheae one end; Described high temperature resistant tracheae directly is located in going out in ash bucket of biomass gasifying furnace, and high temperature resistant tracheae is double-deck mechanism, and it comprises outer tube and interior tracheae, between outer tube and interior tracheae, forms water jacket, is connected with mobile water coolant in water jacket; Described interior tracheae one end is communicated with described the first tracheae, and interior tracheae middle part is communicated with main tracheae,, main tracheae upwards insert in grey disc mechanism gas-distributing pipe in, for air being sent into below the zone of combustion in biomass gasifying furnace.

As a further improvement on the present invention, in described furnace binding, bottom of furnace body by pipe support be equipped with many for heeling-in the heat-resisting thin permeability cell in zone of combustion, described many heat-resisting thin permeability cells upwards are uniformly distributed along week on a plurality of circumference, the pipe top of heat-resisting thin permeability cell is provided with tapered cap, and the tube wall of heat-resisting thin permeability cell is provided with a plurality of for aperture ventilative in zone of combustion; The described hawk of scraping is elongated plates, scrapes the length direction of hawk along ash-stopping ring radially, and width and the vertical direction of scraping hawk form the angle of 3 °; Described body of heater is provided with the flare type joint be connected with inner core inside; Be provided with an enforced loop plane coaxial with it in described ash-stopping ring, the inner that described polylith is scraped hawk all is weldingly fixed on enforced loop plane; Be provided with stiffening plate between described inner tank theca and outer tube inner wall, be provided with the first reinforcement gusset between described the second ring flat-plate upper surface and outer tube inner wall, be provided with the second reinforcement gusset between described water seal ring outer wall and the second ring flat-plate lower surface, be provided with the 3rd between described ash-stopping ring outer wall and water seal circle inwall and strengthen gusset; Described refractory heat-insulating wall body adopts the refractory castable cast to form or be built into by refractory brick.

As a further improvement on the present invention, in described grey disc mechanism, the blast cap assembly comprises the blast cap of at least two stacked settings, described blast cap shape is identical, for taper barrel, but size is bottom-up, reduce gradually, nethermost blast cap is fixed on the ring flat-plate of center by retaining plate, and the blast cap of last layer is fixed on the upper surface of lower one deck blast cap by retaining plate; Blast cap assembly in described water seal inner ring is arranged with air loop duct outward, and described air loop duct is connected with admission passage; The bottom on described chassis is provided with lime scraping knife, and the lime scraping knife length direction is to the inclined to one side 5 degree angles of the sense of rotation on chassis; Be provided with along the circumferential direction equally distributed outer gusset of polylith between the outer wall of described water seal outer ring and the upper surface of base plate, the outer end of the outer gusset of described polylith all is welded on same ring flat-plate, and this ring flat-plate is weldingly fixed on base plate; Bottom in described water seal between ring outer wall and water seal outer ring inwall is provided with along the circumferential direction equally distributed inner reinforced plate of polylith; Described base plate lower surface is provided with for receiving the sawtooth circle of motivating force; Described gas-distributing pipe lower end is fitted with gear ash cover.

As a further improvement on the present invention, describedly go out in ash bucket, heat-insulating heat-preserving material adopts aluminum silicate fiber; The described tapering α that goes out ash bucket is 45 ~ 80 degree; Described ash output hole is rectangle, and the inwall of described inner core lower part is made as four planes, and these four planes are the four edges of corresponding rectangle ash output hole respectively; The described middle part that goes out ash bucket is provided with vision slit, and described lower part that goes out ash bucket is provided with access opening.

As a further improvement on the present invention, in described ash convenyer structure, driving mechanism adopts the deceleration direct-current machine, and the output shaft of deceleration direct-current machine is by shaft coupling and rotating shaft connection for transmission, and the rotating shaft lower end is supported by bearing support; Described the first sealed bearing assembly comprises gland, round nut, clutch shaft bearing, clutch shaft bearing seat and the first felt collar, the clutch shaft bearing seat is fixed on upper flange and covers, the clutch shaft bearing support assemblies is passed through in the clutch shaft bearing seat in the rotating shaft upper end, clutch shaft bearing is locked by round nut and, by gland seal, the first felt collar of sealing use is housed between rotating shaft and clutch shaft bearing seat; Described the second sealed bearing assembly comprises the second bearing support, the second bearing, step cover and stuffing box, the second bearing support is fixed on lower flange and covers, the rotating shaft lower end is assemblied in the second bearing support by the second bearings, the second bearing compresses by step cover, step cover is fixed by bolts on the second bearing support, the second felt collar of sealing use is housed respectively between rotating shaft and the second bearing support, step cover, and stuffing box is arranged on the step cover outside; Described ash output hole connects Blowing stopper, on the ash output hole side, is provided with pressure tap.

As a further improvement on the present invention, the zone of combustion below in described biomass gasifying furnace also is provided with annular gas pipe, and the described high temperature resistant tracheae the other end is communicated with annular gas pipe by the second tracheae, the 3rd tracheae successively; Described high temperature resistant tracheae one end is provided with into the water interface, and the other end is provided with the backwater interface, and the water inlet interface is communicated with cooling basin by suction culvert, and the backwater interface connects water return pipeline, and suction pump is installed on water return pipeline; Be provided with temperature element, venting and pressure measurement interface on described the first tracheae, be fitted with aluminium foil explosive-proof protector film on venting, the pressure measurement interface is for connecting pressure instrumentataion; Described the first air pipe is provided with the steam access tube.

As a further improvement on the present invention, described feeding unit comprises blanking device and feeding conveyor, described blanking device comprises Connection Block, lower shell, bell jar valve body, valve seat, conical seat, upper shell, supporting sealing frame, the first bar, the second bar, chain cover, suspension chain and bracket institution, lower shell supports by bracket institution, the lower shell lower end is installed with for connecting the Connection Block of feeding conveyor, the lower shell upper end is connected with the upper shell lower end by flange, in edge, conical seat upper end and upper shell lower end, along being welded and fixed, valve seat is arranged on the conical seat lower end; The supporting sealing frame is arranged on the upper shell outer wall, in the supporting sealing frame, is provided with rotating shaft; Described the first bar one end is arranged in rotating shaft and follows rotating shaft and synchronously rotate, and the first bar the other end is installed chain cover, on chain cover, by hanging chain, hangs the bell jar valve body, and this bell jar valve body matches with described valve seat, controls biomass fuel and enters; Described the second bar one end is arranged in rotating shaft and follows rotating shaft and synchronously rotate, the second bar the other end hinge pull bar.

As a further improvement on the present invention, described bracket institution comprises toroidal frame, link span, auxiliary bracing frame, bearing and column, toroidal frame is fixed on the lower shell periphery wall, be distributed with in the lower shell both sides column that two degree of being are arranged symmetrically with, column upper end welding bearing, toroidal frame is stated in bearing rest residence; Described link span is fixed on toroidal frame, and link span is fixed on auxiliary bracing frame, and auxiliary bracing frame is fixed on top of gasification furnace; The tapering of described bell jar valve body is 50 ~ 75 degree.

As a further improvement on the present invention, described feeding conveyor comprises housing, main drive shaft, driven shaft, drive sprocket, driven sprocket, the chain band, scraper plate, bed of material walking plate and driving mechanism, described housing is microscler, case top is provided with the opening for feed for being connected with the Connection Block lower end, described housing one end is installed main drive shaft by the first bearing assembly, the housing the other end is installed driven shaft by the second bearing assembly, described main drive shaft is positioned at the two ends of housing drive sprocket is installed respectively, described driven shaft is positioned at the two ends of housing driven sprocket is installed respectively, respectively pass through a chain band connection for transmission between two driven sprockets and two drive sprockets, be provided with some scraper plates between described two chain bands, the scraper plate two ends are connected on two chain bands and follow the chain band and are synchronized with the movement, bed of material walking plate is horizontally set in housing along the length direction of housing, described scraper plate base near but do not contact bed of material walking plate upper surface.

As a further improvement on the present invention, also be provided with the strainer for two chain bands of tensioning on described feeding conveyor; Described strainer has two covers, chain band of the corresponding tensioning of every cover strainer, single cover strainer comprises wheel carrier and tightener sprocket, described wheel carrier is microscler, offer the installation slotted hole on wheel carrier, wheel carrier is fastened on housing by the bolt part be contained in this installation slotted hole, and described tightener sprocket is arranged on the wheel carrier upper end, tightener sprocket and chain band engagement by the tensioning of chain band.

As a further improvement on the present invention, described the first bearing assembly comprises front gland seat, front gland, rear pressing cover seat and rear pressing cover, front gland seat, rear pressing cover seat are separately fixed on the front and back sidewall of housing, front gland is contained on front gland seat, rear pressing cover is contained on the rear pressing cover seat, and described both ends of main drive shaft is assemblied in front gland, rear pressing cover by sleeve supporting respectively; Described the second bearing assembly comprises two bearing supports, and two bearing supports are separately positioned on the front and back side of housing, and the two ends of described driven shaft are assemblied in two bearing supports by sleeve supporting respectively.

As a further improvement on the present invention, described driving mechanism comprises motor and speed reducer, and step-down gear is fixedly mounted on case top by speed reducer base, and motor is connected with step-down gear, on the output shaft of step-down gear, drive sprocket is installed; The shaft extension end of described main drive shaft is equipped with driving chain wheel, and this driving chain wheel and described drive sprocket are by the chain connection for transmission; Described step-down gear adopts cycloidal planetary gear speed reducer; End and bottom near opening for feed one end on described housing are respectively equipped with opening, and the opening of shell end seals by dismountable valve gap and sealing-ring, and the opening of housing bottom seals by dismountable cover plate and sealing-ring.

As a further improvement on the present invention, also be provided with the scraper for fuel charge level height is consistent in described body of heater; Described scraper comprises transmission shaft, scrapes materials and parts and driving mechanism, and transmission shaft is inserted downwards in body of heater by the furnace roof center, and installation is supported by supporting component in the transmission shaft upper end, and transmission shaft relies on driving mechanism to drive rotation, and the described charging tray of scraping is fixed on the transmission shaft lower end.

As a further improvement on the present invention, described supporting component comprises mount pad, thrust ball bearing, deep groove ball bearing and gland, mount pad is fixed on furnace roof, the axle journal of transmission shaft upper end is contained in the centre hole of mount pad, thrust ball bearing is sleeved on axle journal and, by nut locking, two seat rings of thrust ball bearing contact respectively and support mount pad and nut; Deep groove ball bearing is sleeved on axle journal, and the inside and outside circle of deep groove ball bearing contacts respectively and supports axle journal and mount pad; Gland is arranged on mount pad, and gland is encapsulated in thrust ball bearing and deep groove ball bearing in the centre hole of mount pad; Clamped paronite between described mount pad and furnace roof, between described mount pad and transmission shaft, sealing-ring has been housed.

As a further improvement on the present invention, described driving mechanism comprises motor reducer, minor sprocket, hinge wheel and chain, motor reducer is fixed on furnace roof by seat supports, minor sprocket is arranged on the output shaft of motor reducer, hinge wheel is arranged on described transmission shaft upper end, passes through the chain connection for transmission between hinge wheel and minor sprocket; Described transmission shaft upper end suit drive sleeve is also passed through the flat key joint transmission, and hinge wheel is arranged on drive sleeve by shearing pin.

As a further improvement on the present invention, on described transmission shaft, be provided with for keeping the stable auxiliary support mechanism of transmission shaft; Described auxiliary support mechanism comprises guide pin bushing, lining, platen, connecting rod and supporting seat, and guide pin bushing is fixed on transmission shaft, and platen is assemblied in by lining also can be in free rotation on guide pin bushing; Described platen periphery is provided with at least three, and along its circumferential uniform hinged-support, one end of at least three connecting rods is hinged on hinged-support, the other end hinge supporting seat of at least three connecting rods, and supporting seat is supported on the inboard wall of furnace body surface; The described charging tray of scraping comprises that center hub and Duo Gen are connected to the scraping rod on center hub, and center hub is fixed on the transmission shaft lower end by fastening piece, and many scraping rods along the circumferential direction are uniformly distributed on center hub.

As a further improvement on the present invention, described cyclone dust collector comprises support, primary cyclone and secondary cyclone, described primary cyclone, secondary cyclone pass through stent support, the blast pipe of primary cyclone is for passing into pending combustion gas, the exhaust duct of primary cyclone is connected with the blast pipe of secondary cyclone, and the exhaust duct of secondary cyclone is transported to the next stage treatment facility for the combustion gas by after processing.

As a further improvement on the present invention, described primary cyclone is identical with the structure of secondary cyclone, they include blast pipe, exhaust duct and cylindrical shell, the cylindrical shell upper semisection is cylindrical, lower semisection is conical, blast pipe is arranged on cylindrical shell, the direction that air-flow enters from blast pipe is for tangential, exhaust duct coaxially is arranged in cylindrical shell, the exhaust duct bottom is shrunk to taper shape downwards gradually, the tube wall of exhaust duct is provided with multiple tracks longer tuyere along its length, and described longer tuyere is single deflection grille; Described multiple tracks longer tuyere is along circumferentially uniform on the tube wall of exhaust duct, and exhaust duct lower end tube wall is provided with a plurality of along its circumferential uniform wind hole; Be provided with a sleeve body that shape is suitable with it outside described cylindrical shell, between sleeve body inwall and cylinder body outer wall, form water jacket, the water jacket bottom is provided with water-in, and water jacket top is provided with water outlet; Described cylindrical shell lower end also is connected with a conic tube, and the bore of conic tube upper end is greater than the bore of cylindrical shell lower end.

As a further improvement on the present invention, described one-level tubular type inter cooler comprises bracing frame, water cooling box, air intake casing, the housing of giving vent to anger, water inflowing box, water outlet box, serpentine tube, water inlet pipe and rising pipe, described water cooling box supports by bracing frame, water cooling box is at least one, the stacked placement of at least one water cooling box, between the casing of all water cooling boxes, be tightly connected, the bottom half of bottom water cooling box is equipped with the air intake casing be communicated with inlet pipe, and topmost the casing top of water cooling box is equipped with the housing of giving vent to anger; The both sides of described casing front surface seal respectively installs water inflowing box and water outlet box, be provided with the many serpentine tubes in the different heights staggered arrangement in casing, the two ends of many serpentine tubes are communicated with described water inflowing box and water outlet box respectively, and water coolant can circulate from bottom to top in serpentine tube; Described water inlet pipe is arranged in bracing frame and water cooling box one side, and the water inflowing box bottom on each water cooling box is communicated with water inlet pipe by water inlet pipe, and a valve all is installed on each water inlet pipe; Outlet pipe arrangement is at bracing frame and water cooling box opposite side, and an exit branch is all installed on the water outlet box top on each water cooling box, and the water outlet below of each exit branch is provided with a funnel, and this funnel is communicated with described rising pipe; The structure of described secondary tubular type inter cooler is identical with one-level tubular type inter cooler.

As a further improvement on the present invention, the described housing of giving vent to anger is provided with venting, and relief pipe is installed on venting, and decompression hand valve is installed on relief pipe; The bottom of described air intake casing is connected with aggregate pipe, and the aggregate pipe lower end connects collection bucket, and the first valve open in usual is installed on aggregate pipe; Described collection bucket bottom is equipped with drainage conduit, and the second valve of normally closed type is installed on drainage conduit; Described water cooling box has six, and water cooling box is square.

As a further improvement on the present invention, described combustion gas filtering and purifying comprises air inlet pants pipe, valve, the first gas filter, the second gas filter and the pants pipe of giving vent to anger, the supervisor of described air inlet pants pipe is for air inlet, and the supervisor of the pants pipe of giving vent to anger is for giving vent to anger; An arm of air inlet pants pipe is connected with the inlet mouth of the first gas filter through a valve, and the air outlet of the first gas filter is connected with an arm of the pants pipe of giving vent to anger through another valve; Another arm of air inlet pants pipe is connected with the inlet mouth of the second gas filter through a valve, and the air outlet of the second gas filter is connected with another arm of the pants pipe of giving vent to anger through another valve.

As a further improvement on the present invention, described valve adopts Hand-operated butterfly valve; The supervisor of described air inlet pants pipe, the pants pipe of giving vent to anger is identical with the caliber of arm.

As a further improvement on the present invention, described one-level moisture separator comprises cyclonic separator and water tank, described cyclonic separator passes through stent support, the blast pipe of cyclonic separator is for passing into the combustion gas that contains moisture, the exhaust duct of cyclonic separator is transported to the next stage treatment facility for the combustion gas that will separate after moisture, the liquid outlet of cyclonic separator bottom is connected with pipeline, and this lower end of duct stretches in water tank; Described water tank upper is provided with upflow tube, for the liquid level by water tank, maintains certain altitude; The structure of described second level moisture separator is identical with the one-level moisture separator.

As a further improvement on the present invention, described cyclonic separator comprises blast pipe, exhaust duct and cylindrical shell, the cylindrical shell upper semisection is cylindrical, lower semisection is conical, blast pipe is arranged on cylindrical shell, the direction that air-flow enters from blast pipe is for tangential, exhaust duct coaxially is arranged in cylindrical shell, the exhaust duct bottom is shrunk to taper shape downwards gradually, the tube wall of exhaust duct is provided with multiple tracks longer tuyere along its length, described multiple tracks longer tuyere is along circumferentially uniform on the tube wall of exhaust duct, and exhaust duct lower end tube wall is provided with a plurality of along its circumferential uniform wind hole; Described longer tuyere is single deflection grille.

As a further improvement on the present invention, described gas transmission gas storage piping system comprises connecting tube, roots blower, smoke evacuation purification of combustion device and coal gas surge tank, the outlet of described second level moisture separator is connected respectively with smoke evacuation purification of combustion device, coal gas surge tank by connecting tube, described roots blower is arranged on connecting tube, for carrying capacity is provided, described smoke evacuation purification of combustion device is for removing the detrimental impurity composition of Exhaust Gas, and described coal gas surge tank is for temporary biological fuel gas.

As a further improvement on the present invention, described smoke evacuation purification of combustion device comprises blower fan, air inlet pipeline, burning purification pipe, supporting tube, stovepipe, lower flat flame burner, upper flat flame burner, lower high temperature steel dividing plate and upper high temperature steel dividing plate; Blower fan connects air inlet pipeline, and the burning purification pipe supports by supporting tube, and burning purification pipe lower end import is connected with the foreign gas access tube, for passing into pending foreign gas; The outlet of burning purification pipe upper end connects stovepipe, is provided with stack cover directly over stovepipe, and stack cover is fixed on stovepipe by support bar; Described burning purification pipe inwall is provided with refractory masses, lower flat flame burner is arranged on a side of burning purification pipe bottom, upper flat flame burner is arranged on the opposite side on burning purification pipe top, be provided with burner block around lower flat flame burner, upper flat flame burner, the air intlet of lower flat flame burner, upper flat flame burner is communicated with air inlet pipeline respectively, and the fuel gas inlet of lower flat flame burner, upper flat flame burner is communicated with gas line respectively; Lower high temperature steel dividing plate is arranged on the bottom in the burning purification pipe, is positioned under lower flat flame burner, and the side near lower flat flame burner on lower high temperature steel dividing plate is provided with ventilating pit; Upper high temperature steel dividing plate is arranged on the middle part of burning in purification pipe, is positioned on lower flat flame burner, under upper flat flame burner, and the side near upper flat flame burner on upper high temperature steel dividing plate is provided with ventilating pit.

As a further improvement on the present invention, described burning purification pipe comprises the first pipe fitting and the second pipe fitting connected by flange, and the upper end of the first pipe fitting is conical, and its top is provided with pipe connecting, and the pipe connecting upper end is connected with described stovepipe; The second pipe fitting supports by supporting tube, and the lower end of the second pipe fitting is conical, and its bottom is provided with bridge piece, and bridge piece is connected with the foreign gas access tube; Described burning purification pipe bottom is provided with the nozzles with injector that spout makes progress, and nozzles with injector is near lower flat flame burner one side on the burning purification pipe, and nozzles with injector is communicated with described air inlet pipeline; Having clamped one deck string diameter between described burning purification pipe lower end import and foreign gas access tube is 0.6mm, and the order number is 10 purpose Stainless Steel Wire screen cloths, in case the non-return fire; The composition of described refractory masses is aluminosilicate property refractory fibre, polycrystalline alumina fiber, mullite fiber or Zirconium oxide fibre.

Compared with prior art, advantage is in the present invention: structure of the present invention is ingenious rationally can not produce secondary pollution to surrounding enviroment when rationally utilizing biomass energy, and the combustion gas of preparation both can be used as civilian, banned traditional bavin kitchen range, substituted liquefied gas; Also can be applied in industrial aspect, as directly used as industrial combustion gas, or supply with the use that generating set is done generating.

The accompanying drawing explanation

The structural representation that Fig. 1 is the embodiment of the present invention.

The structure vertical view that Fig. 2 is the embodiment of the present invention.

The structural representation that Fig. 3 is biomass gasifying furnace.

Fig. 4 is the furnace binding schematic diagram in biomass gasifying furnace.

Fig. 5 is the furnace binding vertical view in biomass gasifying furnace.

The structural representation that Fig. 6 is the grey disc mechanism in biomass gasifying furnace.

The structure vertical view that Fig. 7 is the grey disc mechanism in biomass gasifying furnace.

Fig. 8 is the structural representation that goes out ash bucket in biomass gasifying furnace.

Fig. 9 is the structure vertical view that goes out ash bucket in biomass gasifying furnace.

The structural representation that Figure 10 is the ash convenyer structure in biomass gasifying furnace.

Figure 11 is the A section enlarged diagram in Figure 10.

Figure 12 is the B section enlarged diagram in Figure 10.

The structural front view that Figure 13 is the admission passage in biomass gasifying furnace.

The structural representation that Figure 14 is feeding unit.

The structural front view that Figure 15 is blanking device in Figure 14.

The left view that Figure 16 is Figure 15.

The vertical view that Figure 17 is Figure 15.

The structural front view that Figure 18 is feeding conveyor in Figure 14.

The vertical view that Figure 19 is Figure 18.

The structural front view that Figure 20 is scraper.

Figure 21 is the C section enlarged diagram in Figure 20.

The structural representation that Figure 22 is cyclone dust collector.

The vertical view that Figure 23 is Figure 22.

The structural representation that Figure 24 is one-level tubular type inter cooler.

The vertical view that Figure 25 is Figure 24.

The structural representation that Figure 26 is filtering and purifying.

The structural representation that Figure 27 is the one-level moisture separator.

The vertical view that Figure 28 is Figure 27.

Figure 29 is the structural representation of smoke evacuation purification of combustion device.

The vertical view that Figure 30 is Figure 29.

Embodiment

Below in conjunction with concrete drawings and Examples, the invention will be further described.

Biomass fuel gas generating system in embodiment mainly comprises feeding unit 1, biomass gasifying furnace, after-treatment system and gas transmission gas storage piping system, they are connected with processing sequence successively by the combustion gas generation, described biomass gasifying furnace has fuel inlet and gas outlet, the burning import is connected with feeding unit 1, and gas outlet is communicated with after-treatment system by connecting tube, described after-treatment system comprises cyclone dust collector 8, one-level tubular type inter cooler 9, electrical tar precipitator 10, secondary tubular type inter cooler 11, filtering and purifying 12, one-level moisture separator 13 and second level moisture separator 14, the import of cyclone dust collector 8 is connected with the gas outlet of biomass gasifying furnace by connecting tube, the outlet of cyclone dust collector 8 is divided into two branch roads, by connecting tube, with the import of two one-level tubular type inter coolers 9, be connected respectively, the outlet of these two one-level tubular type inter coolers 9 is connected with the import of same electrical tar precipitator 10 by connecting tube respectively, the outlet of described electrical tar precipitator 10 is divided into two branch roads, by connecting tube, with the import of two secondary tubular type inter coolers 11, be connected respectively, the outlet of these two secondary tubular type inter coolers 11 is connected with the import of filtering and purifying 12 by connecting tube respectively again, the outlet of described filtering and purifying 12 is connected with the import of one-level moisture separator 13 by connecting tube, the outlet of this one-level moisture separator 13 is connected with the import of second level moisture separator 14 by connecting tube, the outlet of this second level moisture separator 14 connects gas transmission gas storage piping system again.

Described biomass gasifying furnace is the main part that produces biological fuel gas, its mainly by furnace binding 2, grey disc mechanism 3, go out ash bucket 4, ash convenyer structure 5 and admission passage 6 and form.

The structure of described furnace binding 2 is as shown in Fig. 3 ~ Fig. 5, and it is mainly strengthened gusset 2.10, the second ring flat-plate 2.11, second by annular flange 2.1, inner core 2.2, urceolus 2.4, stiffening plate 2.5, flare type joint 2.7, the first ring flat-plate 2.9, first and strengthens gusset 2.12, the 3rd and strengthen gusset 2.13, water seal circle 2.14, scrape the component such as hawk 2.15, ash-stopping ring 2.16, enforced loop plane 2.17, pipe support 2.20 and heat-resisting thin permeability cell 2.21 and form.Inner core 2.2 is placed in upper part of urceolus 2.4, inner core 2.2 edges, upper end and urceolus 2.4 edges, upper end are by annular flange 2.1 welded seals, pass through the first ring flat-plate 2.9 welded seals between inner core 2.2 edges, lower end and urceolus 2.4 inwalls, form water jacket between inner core 2.2 outer walls and urceolus 2.4 inwalls, on urceolus 2.4 walls, be provided with corresponding to the water-in 2.18 of water jacket bottom with corresponding to the water return outlet 2.19 on water jacket top, water inlet pipe 2.8 positions that water-in 2.18 connects in water inlet pipe 2.8(Fig. 4 are in order to mean the position of water-in 2.18 on short transverse, press shown in Fig. 5 position on its circumference), lower part inner wall surface of described urceolus 2.4 is provided with refractory heat-insulating wall body 2.6, described the second ring flat-plate 2.11 is weldingly fixed on urceolus 2.4 edges, lower end, ash-stopping ring 2.16 and water seal circle 2.14 coaxially arrange, and be welded on the second ring flat-plate 2.11 bottoms, ash-stopping ring 2.16 is interior, water seal circle 2.14 outside, water seal circle 2.14, for coordinating with the grey disc mechanism 3 of below, is realized water-lute, prevents gas leak, polylith is scraped that hawk 2.15 is welded on ash-stopping ring 2.16 inwalls and is uniformly distributed along the circumferential direction of ash-stopping ring 2.16, described body of heater middle part is provided with the opening for feed 2.22 for adding biomass fuel, and described opening for feed 2.22 communicates with inner core 2.2 inside, and described upper of furnace body is provided with the air outlet 2.3 for inputting biological fuel gas, and described air outlet 2.3 communicates with inner core 2.2 inside.

In the present invention, described water jacket width is 100 ~ 250mm, is highly 2000 ~ 4000mm, and interior stove diameter is Ф 2000 ~ Ф 4500mm.The thickness of described refractory heat-insulating wall body 2.6 is 150 ~ 350mm, is highly 800 ~ 2000mm, and diameter is Ф 2000 ~ Ф 4500mm.

As shown in Fig. 3 ~ Fig. 5, described bottom of furnace body by pipe support 2.20 be equipped with many for heeling-in the heat-resisting thin permeability cell 2.21 in zone of combustion, described many heat-resisting thin permeability cells 2.21 upwards are uniformly distributed along week on a plurality of circumference, the pipe top of heat-resisting thin permeability cell 2.21 is provided with tapered cap, and described tapered cap can prevent that heat-resisting thin permeability cell 2.21 is plugged; The tube wall of described heat-resisting thin permeability cell 2.21 is provided with a plurality of for aperture ventilative in zone of combustion.In the present invention, the number of described heat-resisting thin permeability cell 2.21, according to the size setting of body of heater, in general arranges 15 ~ 27, and the internal diameter size of heat-resisting thin permeability cell 2.21 is generally Ф 60 ~ Ф 108mm.Described heat-resisting thin permeability cell 2.21 can solve ventilation property, the incendivity of pulverized fuel, improves gas producing efficiency, avoids body of heater fuel Quench, makes fuel combustion even.

As shown in Fig. 3 ~ Fig. 5, the described hawk 2.15 of scraping is for elongated plates, scrape the length direction of hawk 2.15 along ash-stopping ring 2.16 radially, width and the vertical direction of scraping hawk 2.15 form the angle of 3 °, contribute to like this lime-ash is dropped down onto out in ash bucket 4 to pressing down.Described body of heater is provided with the flare type joint 2.7 be connected with inner core 2.2 inside, and flare type joint 2.7, for connecting the thermometric components and parts, to detect in real time the temperature in body of heater, is convenient to control.

In order to improve overall construction intensity of the present invention, be provided with an enforced loop plane coaxial with it 2.17 in described ash-stopping ring 2.16, the inner that described polylith is scraped hawk 2.15 all is weldingly fixed on enforced loop plane 2.17.For same purpose, be provided with stiffening plate 2.5 between described inner core 2.2 outer walls and urceolus 2.4 inwalls, be provided with the first reinforcement gusset 2.10 between described the second ring flat-plate 2.11 upper surfaces and urceolus 2.4 inwalls, be provided with the second reinforcement gusset 2.12 between described water seal circle 2.14 outer walls and the second ring flat-plate 2.11 lower surfaces, be provided with the 3rd between described ash-stopping ring 2.16 outer walls and water seal circle 2.14 inwalls and strengthen gusset 2.13.Described refractory heat-insulating wall body 2.6 can adopt the refractory castable cast to form or be built into by refractory brick.

Described grey disc mechanism 3 be arranged on furnace binding 2 under, the structure of ash disc mechanism 3 as shown in Figure 6, Figure 7, its mainly by gas-distributing pipe 3.1, blast cap 3.2, retaining plate 3.3, chassis 3.4, bearing pin 3.5, upflow tube 3.6, water seal inner ring 3.7, water seal outer ring 3.8, funnel 3.9, ring flat-plate 3.10, outer gusset 3.11, sawtooth circle 3.12, inner reinforced plate 3.13, water seal slotting tool 3.14, base plate 3.15, keep off grey cutter 3.16, bearing 3.17, center ring flat-plate 3.18, gear ash cover 3.19 lime scraping knifes 3.20 and grate 3.21 and form.Water seal inner ring 3.7 coaxially arranges with water seal outer ring 3.8, jointly is welded on base plate 3.15 upper surfaces, between water seal inner ring 3.7 and water seal outer ring 3.8, forms annular seal-water tank; The inwall of described water seal inner ring 3.7 is provided with a plurality of along the circumferential direction equally distributed bearings 3.17, and chassis 3.4 is shelved on bearing 3.17 and with bearing pin 3.5 and is connected with bearing 3.17, and grate 3.21 is placed on chassis 3.4; 3.4 center, described chassis is provided with through hole, and gas-distributing pipe 3.1 is located in this through hole, gas-distributing pipe 3.1 top closure, and the perisporium on gas-distributing pipe 3.1 tops is provided with pore; Described blast cap assembly is sleeved on gas-distributing pipe 3.1 and relies on center ring flat-plate 3.18 to support, and center ring flat-plate 3.18 is fixed on chassis 3.4, and the ventilation gaps in the blast cap assembly communicates with the pore on gas-distributing pipe 3.1; Gear ash cutter 3.16 and the annular water seal slotting tool 3.14 of annular coaxially arrange, and are welded on respectively on the lower surface of described base plate 3.15.

Described annular seal-water tank is for coordinating with the water seal circle 2.14 of bottom of furnace body, and water seal circle 2.14 inserts in this annular seal-water tank downwards, realizes water-lute; Described water seal slotting tool 3.14 goes out in the water sealed tank of ash bucket 4 for inserting its below, thereby realizes water-lute, makes in vapourizing furnace to keep malleation.

The structure of described blast cap assembly as shown in Figure 6, its blast cap by three stacked settings 3.2 forms, described three blast cap 3.2 shapes are identical, but size is bottom-up, reduce gradually, nethermost blast cap 3.2 is fixed on center ring flat-plate 3.18 by retaining plate 3.3, and the blast cap 3.2 of last layer is fixed on the upper surface of lower one deck blast cap 3.2 by retaining plate 3.3.The shape of described blast cap 3.2 preferably is set to taper barrel.

Blast cap assembly periphery in described water seal inner ring 3.7 can also arrange an air loop duct, and air loop duct is connected with admission passage 6, can realize even ventilation like this, makes burning consistent, has advantages of gas production rate greatly and sufficient combustion.The bottom on described chassis 3.4 is provided with lime scraping knife 3.20, lime scraping knife 3.20 length directions are the inclined to one side 5 degree angles of 3.4 sense of rotation to chassis, when lime-ash sees through grate 3.21 and chassis 3.4 when falling into ash discharge bucket 4, lime scraping knife 3.20 can squeeze block lime-ash broken, is convenient to follow-up recycling.The sidewall on 3.8 tops, described water seal outer ring is provided with upflow tube 3.6, under upflow tube 3.6 outlets, is provided with funnel 3.9, and the water on grey disc mechanism 3 in annular seal-water tank can flow into below downwards through funnel 3.9 and go out in the annular seal-water tank on ash bucket 4; Can make like this water in annular seal-water tank remain on certain altitude, can not overflow and flow in grey disc mechanism 3.

As shown in Figure 6, in order to improve structural strength of the present invention, be provided with along the circumferential direction equally distributed outer gusset 3.11 of polylith between the outer wall of described water seal outer ring 3.8 and the upper surface of base plate 3.15, the outer end of the outer gusset 3.11 of described polylith all is welded on same ring flat-plate 3.10, and this ring flat-plate 3.10 is weldingly fixed on base plate 3.15.Bottom between described water seal inner ring 3.7 outer walls and water seal outer ring 3.8 inwalls is provided with along the circumferential direction equally distributed inner reinforced plate 3.13 of polylith.Described base plate 3.15 lower surfaces are provided with sawtooth circle 3.12, for receiving the independent transmission of external motivating force, make to operate reliably steadily, can guarantee that when ash discharge zone of combustion stablizes twist.Described gas-distributing pipe 3.1 lower ends are fitted with gear ash cover 3.19, and gear ash cover 3.19 is for preventing that lime-ash from entering in admission passage 6, avoids the latch up phenomenon of admission passage 6.

Describedly go out ash bucket 4 and be arranged under grey disc mechanism 3, go out the structure of ash bucket 4 as shown in Figure 8, Figure 9, it mainly is comprised of urceolus 4.8, inner core 4.7, flange 4.5 and flanged pipe 4.6, described urceolus 4.8 and inner core 4.7 are pyramidal structure, their edge, upper end is weldingly fixed on flange 4.5 lower surfaces, be filled with heat-insulating heat-preserving material 4.10 between urceolus 4.8 and inner core 4.7, described heat-insulating heat-preserving material 4.10 preferably adopts aluminum silicate fiber, and described inner core 4.7 lower ending openings are ash output hole 4.12; Both sides on described urceolus 4.8 and inner core 4.7 are respectively arranged with flanged pipe 4.6, and the axle center of both sides flanged pipe 4.6 is on same axis, and flanged pipe 4.6 passes through for admission passage 6.Be welded with inner ring 4.1 and the outer ring 4.2 of coaxial setting on the upper surface of described flange 4.5, between inner ring 4.1 and outer ring 4.2, form annular seal-water tank, this annular seal-water tank coordinates for the water seal slotting tool 3.14 on the grey disc mechanism 3 with top, realizes water-lute; Be provided with return water pipe 4.13 on the annular seal-water tank sidewall, be provided with a plurality of along the circumferential direction equally distributed support running rollers 4.3 in annular seal-water tank, described support running roller 4.3 supports by its base 4.4, for the grey disc mechanism 3 of rest top.Fall smoothly in order to ensure dry ash, not there will be fouling phenomenon, the described tapering α that goes out ash bucket 4 is 45 ~ 80 degree.

As shown in Figure 8, Figure 9, described ash output hole 4.12 is rectangle, and the inwall of described inner core 4.7 lower parts is made as four planes, and these four planes are the four edges of corresponding rectangle ash output hole 4.12 respectively.In addition, the described middle part that goes out ash bucket 4 is provided with vision slit 4.9, and described lower part that goes out ash bucket 4 is provided with access opening 4.11.

Described ash convenyer structure 5 is arranged on out ash bucket 4 belows, the structure of ash convenyer structure 5 is as shown in Figure 10 ~ Figure 12, and it mainly is comprised of bearing 5.1, housing 5.5, upper flange lid 5.3, lower flange lid 5.9, rotating shaft 5.6, the first sealed bearing assembly, the second sealed bearing assembly and driving mechanism; Described bearing 5.1 has an inclination mounting face, housing 5.5 is arranged on the inclination mounting face, housing 5.5 lower ends are provided with opening up ash inlet 5.8, and this ash inlet 5.8 is connected with the described ash output hole 4.12 that goes out ash bucket 4, and housing 5.5 upper ends are provided with downward opening ash output hole 5.2; Described housing 5.5 is double-deck water jacket housings 5.5, and housing 5.5 bottoms, lower end are provided with water-in 5.13, and housing 5.5 tops, upper end are provided with water outlet 5.4; Described housing 5.5 upper ends are equipped with upper flange lid 5.3, lower end is equipped with lower flange lid 5.9, rotating shaft 5.6 is arranged in housing 5.5, rotating shaft 5.6 upper ends are supported and are arranged on upper flange lid 5.3 by the first sealed bearing assembly, rotating shaft 5.6 lower ends are supported and are arranged on lower flange lid 5.9 by the second sealed bearing assembly, rotating shaft 5.6 drives rotation by driving mechanism, and rotating shaft 5.6 is provided with the flight 5.7 for delivery of lime-ash.

As shown in Figure 10 ~ 12, described driving mechanism adopts deceleration direct-current machine 5.12, and the output shaft of deceleration direct-current machine 5.12 is by shaft coupling 5.11 and rotating shaft 5.6 connection for transmissions, and rotating shaft 5.6 lower ends are supported by bearing support 5.10.

The structure of described the first sealed bearing assembly as shown in Figure 2, it mainly is comprised of gland 5.15, round nut 5.16, clutch shaft bearing 5.17, clutch shaft bearing seat 5.18 and the first felt collar 5.19, clutch shaft bearing seat 5.18 is fixed on upper flange lid 5.3, clutch shaft bearing 5.17 support assemblies are passed through in clutch shaft bearing seat 5.18 in rotating shaft 5.6 upper ends, clutch shaft bearing 5.17 is locked by round nut 5.16 and is passed through gland 5.15 sealings, and the first felt collar 5.19 of sealing use is housed between rotating shaft 5.6 and clutch shaft bearing seat 5.18.

The structure of described the second sealed bearing assembly as shown in figure 12, it is mainly by the second bearing support 5.20, the second bearing 5.21, step cover 5.22 and stuffing box 5.24 form, the second bearing support 5.20 is fixed on lower flange lid 5.9, the second bearing 5.21 support assemblies are passed through in the second bearing support 5.20 in rotating shaft 5.6 lower ends, the second bearing 5.21 compresses by step cover 5.22, step cover 5.22 is fixed by bolts on the second bearing support 5.20, rotating shaft 5.6 and the second bearing support 5.20, the second felt collar 5.23 of sealing use is housed respectively between step cover 5.22, stuffing box 5.24 is arranged on step cover 5.22 outsides.

Described ash output hole 5.2, for connecting the Blowing stopper (not shown), is provided with pressure tap 5.14 on ash output hole 5.2 sides.Described Blowing stopper can guarantee ash convenyer structure 5 seal insides, thereby reaches the purpose of dry ash, is convenient to packing, the convenient recycling of collecting; Described pressure tap 5.14, for the Bonding pressure test set, can improve safety and reliability of the present invention like this.

The structure of described admission passage 6 is as shown in Fig. 3, Figure 13, and it mainly is comprised of component such as blower fan 6.1, check valve 6.2, the first tracheae 6.3, high temperature resistant tracheae 6.8, main tracheae 6.9, suction culvert 6.10, the second tracheae 6.11 and the 3rd tracheaes 6.12.

As shown in figure 13, the air outlet of blower fan 6.1 is connected with the blast inlet of check valve 6.2, and the air outlet of check valve 6.2 is connected with the first tracheae 6.3 1 ends, and first tracheae 6.3 the other ends are connected with high temperature resistant tracheae 6.8 1 ends; Described high temperature resistant tracheae 6.8 directly is located in going out in ash bucket 4 of biomass gasifying furnace, high temperature resistant tracheae 6.8 is double-deck mechanism, it comprises outer tube 6.8a and interior tracheae 6.8b, between outer tube 6.8a and interior tracheae 6.8b, forms water jacket, is connected with mobile water coolant in water jacket; Described interior tracheae 6.8b mono-end is communicated with described the first tracheae 6.3, and interior tracheae 6.8b middle part is communicated with main tracheae 6.9, and main tracheae 6.9 is for sending into air the zone of combustion below in biomass gasifying furnace.

Because high temperature resistant tracheae 6.8 directly is located in going out in ash bucket 4 of biomass gasifying furnace, thereby make the pipeline of whole admission passage 6 simple, repair and maintenance gets up more convenient.Because high temperature resistant tracheae 6.8 is the double-deck mechanisms that consist of outer tube 6.8a and interior tracheae 6.8b, form water jacket between outer tube 6.8a and interior tracheae 6.8b, be connected with mobile water coolant in water jacket, the excess Temperature that water coolant can make outer tube 6.8a can not heated by high-temperature ash, security and the work-ing life of having improved pipeline.

In order to make the zone of combustion below, realize evenly ventilating, to reach sufficient combustion, purpose that gas production rate is large, zone of combustion below in described biomass gasifying furnace also is provided with annular gas pipe, and described high temperature resistant tracheae 6.8 the other ends are communicated with annular gas pipe by the second tracheae 6.11, the 3rd tracheae 6.12 successively.

As shown in figure 13, described high temperature resistant tracheae 6.8 1 ends are provided with into the water interface, and the other end is provided with the backwater interface, and the water inlet interface is communicated with cooling basin by suction culvert 6.10, and the backwater interface connects water return pipeline, and suction pump is installed on water return pipeline.During work, suction pump starts provides suction force, and the water coolant in cooling basin is extracted out, and water coolant is flowed in the water jacket of high temperature resistant tracheae 6.8, and water coolant carries out cooling to outer tube 6.8a.

As shown in figure 13, in order to improve the security of whole admission passage 6, on described the first tracheae 6.3, be provided with temperature element 6.4, venting 6.5 and pressure measurement interface 6.6, described temperature element 6.4 can adopt the thermometric copper resistance; Be fitted with the explosive-proof protector film on described venting 6.5, the explosive-proof protector film preferably adopts aluminium foil; Described pressure measurement interface 6.6 is for connecting conventional pressure instrumentataion.

As shown in figure 13, described the first tracheae 6.3 tunnels are provided with steam access tube 6.7, and this steam access tube 6.7 is for passing into steam, and steam, with the zone of combustion drawn after air mixed in vapourizing furnace, can further improve gas production rate and gas heating value.The steam that described steam can adopt biomass gasifying furnace to produce in work, thus realized recycle, improved the efficiency of biomass gasifying furnace.

The concrete applicable cases of biomass gasifying furnace is as follows:

Biomass fuel delivers into body of heater by feeding unit 1 from the opening for feed 2.22 at body of heater middle part, falls into bottom of furnace body, and incomplete combustion forms zone of combustion, around zone of combustion, it is refractory heat-insulating wall body 2.6, can guarantee the zone of combustion temperature-stable, make burning evenly, gasification fully.The zone of combustion below is grey disc mechanism 3, biomass fuel is incomplete combustion in body of heater, generation contains carbon monoxide, the flammable biological fuel gas such as hydrogen and low molecular hydrocarbon gas, these biological fuel gas are upwards discharged via air outlet 2.3, biological fuel gas has higher temperature, the biological fuel gas of high temperature contacts with the water jacket of upper of furnace body in the process of giving vent to anger, with the water generation heat exchange in water jacket, make on the one hand the air outlet temperature of biological fuel gas reduce, can utilize on the other hand the heat radiation of giving vent to anger of high-temperature biomass gas to produce steam, steam can pass in admission passage 6 by pipeline, then the zone of combustion that drew bottom of furnace body, improve gas production rate and gas heating value, remainder steam can clean heating for it.

The lime-ash produced after biomass fuel gasifying drops on rotating grey disc mechanism 3, and when grey disc mechanism 3 rotates, lime-ash is scraped by the hawk 2.15 of scraping of bottom of furnace body, sees through grate 3.21 and chassis 3.4 and drops down onto going out in ash bucket 4 of below.

Ash disc mechanism 3 is arranged on out ash bucket 4 tops and rely on supports running roller 4.3 and support, and grey disc mechanism 3 can smooth rotation; The water seal slotting tool 3.14 of ash disc mechanism 3 bottoms inserts out in the annular seal-water tank on ash bucket 4, realizes water-lute.

Go out ash bucket 4 bottoms and connect ash convenyer structure 5, can realize out easily ash manipulation.Lime-ash falls in the ash inlet 5.8 of housing 5.5 lower ends from going out ash bucket 4, rotating shaft 5.6 is rotated under driving mechanism drives, flight 5.7 in rotating shaft 5.6 is upwards carried lime-ash, then from ash output hole 5.2, discharges, and the Blowing stopper at ash output hole 5.2 places can guarantee ash convenyer structure 5 seal insides; Meanwhile, also pass into water coolant in housing 5.5, lime-ash is cooling, make the dry ash temperature of last output low, be convenient to packing, the convenient recycling of collecting; And such recycling that has also realized energy.

Main tracheae 6.9 in described admission passage 6 inserts in gas-distributing pipe 3.1 from the lower end of gas-distributing pipe 3.1, and air enters body of heater zone of combustion below via the ventilation gaps of the pore on gas-distributing pipe 3.1 and blast cap assembly, air is provided to the gasification of biomass fuel.Described high temperature resistant tracheae 6.8 the other ends are communicated with annular gas pipe by the second tracheae 6.11, the 3rd tracheae 6.12 successively, make the zone of combustion below realize even ventilation, to reach sufficient combustion, purpose that gas production rate is large.

The structure of described feeding unit 1 is as shown in Figure 14 ~ Figure 19, and it mainly is comprised of blanking device and feeding conveyor two portions.

The structure of described blanking device is as shown in Figure 14 ~ Figure 19, it mainly is comprised of Connection Block 1.1, lower shell 1.2, bell jar valve body 1.3, valve seat 1.4, conical seat 1.5, upper shell 1.6, supporting sealing frame 1.14, the first bar 1.16, the second bar 1.13, chain cover 1.17, suspension chain 1.7 and bracket institution, lower shell 1.2 supports by bracket institution, lower shell 1.2 lower ends are installed with the Connection Block 1.1 for connecting feeding conveyor, lower shell 1.2 upper ends are connected with upper shell 1.6 lower ends by flange, flange connections is provided with sealing-ring, to guarantee sealing; In described conical seat 1.5 edges, upper end and upper shell 1.6 lower ends, along being welded and fixed, valve seat 1.4 is arranged on conical seat 1.5 lower ends by fastening piece; Supporting sealing frame 1.14 is arranged on upper shell 1.6 outer walls, in supporting sealing frame 1.14, is provided with rotating shaft 1.15; Described the first bar 1.16 one ends are arranged in rotating shaft 1.15 and follow rotating shaft 1.15 and synchronously rotate, first bar 1.16 the other ends are installed chain cover 1.17, hang bell jar valve body 1.3 by hanging chain 1.7 on chain cover 1.17, this bell jar valve body 1.3 matches with described valve seat 1.4, controls biomass fuel and enters; Described the second bar 1.13 one ends are arranged in rotating shaft 1.15 and follow rotating shaft 1.15 and synchronously rotate, the second bar 1.13 the other end hinge pull bars 1.12.In the present invention, the tapering of described bell jar valve body 1.3 is preferably 50 ~ 75 degree, can guarantee blanking velocity so on the one hand, prevents the furnace gas guest performer; Convenient operation personnel operation on the other hand.

Described bracket institution mainly is comprised of toroidal frame 1.8, link span 1.9, auxiliary bracing frame 1.10, bearing 1.18 and column 1.11, toroidal frame 1.8 is fixed on lower shell 1.2 periphery walls, be distributed with two in lower shell 1.2 both sides and be the column 1.11 that 180 degree are arranged symmetrically with, column 1.11 upper end welding bearings 1.18, toroidal frame 1.8 is stated in bearing 1.18 rest residences; Described link span 1.9 is fixed on toroidal frame 1.8, and link span 1.9 is fixed on auxiliary bracing frame 1.10 by fastening piece, and auxiliary bracing frame 1.10 is fixed on the biomass gasifying furnace top.

The structure of described feeding conveyor is as Figure 18, shown in Figure 19, it is mainly by housing 1.19, main drive shaft 1.37, driven shaft 1.32, drive sprocket 1.38, driven sprocket 1.31, chain band 1.28, scraper plate 1.29, bed of material walking plate 1.30 and driving mechanism form, described housing 1.19 is microscler, housing 1.19 tops are provided with the opening for feed for being connected with Connection Block 1.1 lower ends, described housing 1.19 one ends are installed main drive shaft 1.37 by the first bearing assembly, housing 1.19 the other ends are installed driven shaft 1.32 by the second bearing assembly, described main drive shaft 1.37 is positioned at the two ends of housing 1.19 drive sprocket 1.38 is installed respectively, described driven shaft 1.32 is positioned at the two ends of housing 1.19 driven sprocket 1.31 is installed respectively, respectively pass through chain band 1.28 connection for transmissions between two driven sprockets 1.31 and two drive sprockets 1.38, be provided with the some scraper plates of being made by stainless material 1.29 between described two chain bands 1.28, scraper plate 1.29 two ends are connected on two chain bands 1.28 and follow chain band 1.28 and are synchronized with the movement, bed of material walking plate 1.30 is horizontally set in housing 1.19 along the length direction of housing 1.19, described scraper plate 1.29 bases near but do not contact bed of material walking plate 1.30 upper surfaces.

In addition, in order to guarantee that scraper plate 1.29 has, stablize good scraper effect, need to keep tensioning state for the chain band 1.28 that scraper plate 1.29 is installed, for this reason, also be provided with the strainer for two chain bands 1.28 of tensioning on feeding conveyor of the present invention.As shown in Figure 18, Figure 19, strainer in embodiment has two covers, chain band 1.28 of the corresponding tensioning of every cover strainer, single cover strainer comprises wheel carrier 1.21 and tightener sprocket 1.22, described wheel carrier 1.21 is microscler, offers the installation slotted hole on wheel carrier 1.21, and wheel carrier 1.21 is fastened on housing 1.19 by the bolt part be contained in this installation slotted hole, described tightener sprocket 1.22 is arranged on wheel carrier 1.21 upper ends, and tightener sprocket 1.22 is with 1.28 engagements of chain band and by 1.28 tensionings of chain band.When reality is used, by adjusting the fixed position of wheel carrier 1.21, tensioning degree that can Quality Initiative band 1.28.

As shown in Figure 18, Figure 19, in the embodiment of the present invention, described the first bearing assembly mainly is comprised of front gland seat 1.34, front gland 1.33, rear pressing cover seat 1.39 and rear pressing cover 1.40, front gland seat 1.34, rear pressing cover seat 1.39 are separately fixed on the front and back sidewall of housing 1.19, front gland 1.33 is contained on front gland seat 1.34, rear pressing cover 1.40 is contained on rear pressing cover seat 1.39, and described main drive shaft 1.37 two ends are assemblied in front gland 1.33, rear pressing cover 1.40 by sleeve supporting respectively; Described the second bearing assembly comprises that 1.41, two bearing supports 1.41 of two bearing supports are separately positioned on the front and back side of housing 1.19, and the two ends of described driven shaft 1.32 are assemblied in two bearing supports 1.41 by sleeve supporting respectively.

As shown in Figure 18, Figure 19, described driving mechanism comprises motor 1.36 and step-down gear 1.35, step-down gear 1.35 is fixedly mounted on housing 1.19 tops by speed reducer base 1.26, and motor 1.36 is connected with step-down gear 1.35, and drive sprocket 1.27 is installed on the output shaft of step-down gear 1.35; The shaft extension end of described main drive shaft 1.37 is equipped with driving chain wheel 1.24, and this driving chain wheel 1.24 passes through chain 1.25 connection for transmissions with described drive sprocket 1.27.Described step-down gear 1.35 preferably adopts commercially available cycloidal planetary gear speed reducer 1.35.

As shown in figure 18, end and bottom near opening for feed one end on described housing 1.19 are respectively equipped with opening, so that the cleaning work of housing 1.19 inside, when work, the opening of housing 1.19 ends seals by dismountable valve gap 1.23 and sealing-ring, and the opening of housing 1.19 bottoms seals by dismountable cover plate 1.20 and sealing-ring.Sealing element in the present invention is all to adopt the asbestos rubber material to make, and described axle sleeve is all to be bronze base casting type.

The concrete applicable cases of feeding unit 1 is as follows: when biomass fuel, by handling equipment, be transported in upper shell 1.6, when material reaches a certain amount of, there is the blanking signal to notify operator, operator upwards promote pull bar 1.12 with hand, pull bar 1.12 drives the second bar 1.13 rear ends and moves upward, the rotating shaft 1.15 that the second bar 1.13 front ends drive in supporting sealing frame 1.14 is synchronously rotated, rotating shaft 1.15 drives the first bar 1.16 while rotating, the chain cover 1.17 of the first bar 1.16 front ends moves downward, bell jar valve body 1.3 is because self gravitation descends, between bell jar valve body 1.3 outer walls and valve seat 1.4 lower port, gap appears, biomass fuel can fall in the feeding conveyor of below from this gap, descended rapidly material in 2 ~ 3 seconds, then operator pull pull bar 1.12 downwards, close bell jar valve body 1.3, do not allow furnace gas and stove outer air be ganged up.

Feeding conveyor starts, driving mechanism drives main drive shaft 1.37 and rotates, and the drive sprocket 1.38 on main drive shaft 1.37 rotates, thereby drives 1.28 runnings of chain band, chain band 1.28 drives scraper plate 1.29, and scraper plate 1.29 will be transported in biomass gasifying furnace continuously from the fallen material of blanking device.

As shown in Figure 3, also be provided with the scraper 7 for fuel charge level height is consistent in the body of heater of described biomass gasifying furnace, pass through scraper, can make the material delivered in body of heater remain that the charge level height is consistent, the aerogenesis that can guarantee to burn is even, is not prone to naked light, safe and reliable, stablize furnace pressure, improve gas production rate.The structure of described scraper 7 specifically as shown in Figure 20, Figure 21, its mainly by transmission shaft 7.12, scrape materials and parts and driving mechanism forms, transmission shaft 7.12 inserts in body of heater downwards by the furnace roof center, installation is supported by supporting component in transmission shaft 7.12 upper ends, transmission shaft 7.12 relies on driving mechanism to drive rotation, and the described charging tray 7.13 of scraping is fixed on transmission shaft 7.12 lower ends.

The structure of described supporting component as shown in Figure 20, Figure 21, it mainly is comprised of mount pad 7.11, thrust ball bearing 7.10, deep groove ball bearing 7.8 and gland 7.7, mount pad 7.11 is fixed by screws on furnace roof, clamped paronite 7.19 between mount pad 7.11 and furnace roof, to improve sealing property; The axle journal of transmission shaft 7.12 upper ends is contained in the centre hole of mount pad 7.11, thrust ball bearing 7.10 is sleeved on axle journal and by nut 7.9 and locks, two seat rings of thrust ball bearing 7.10 contact respectively and support mount pad 7.11 and nut 7.9, and thrust ball bearing 7.10 is mainly used in carrying the thrust load of transmission shaft 7.12; Deep groove ball bearing 7.8 is sleeved on axle journal, and the inside and outside circle of deep groove ball bearing 7.8 contacts respectively and supports axle journal and mount pad 7.11, and deep groove ball bearing 7.8 is mainly used in carrying the radial loading of transmission shaft 7.12; Gland 7.7 is arranged on mount pad 7.11, and gland 7.7 is encapsulated in thrust ball bearing 7.10 and deep groove ball bearing 7.8 in the centre hole of mount pad 7.11.In addition, between described mount pad 7.11 and transmission shaft 7.12, sealing-ring 7.20 also is housed; On described mount pad 7.11, also be provided with for the zerk of heart hole charging-up lubricant oil wherein.

As shown in figure 20, described driving mechanism mainly is comprised of motor reducer 7.1, minor sprocket 7.2, hinge wheel 7.5 and chain 7.4, motor reducer 7.1 is supported and fixed on furnace roof by bearing 7.3, minor sprocket 7.2 is arranged on the output shaft of motor reducer 7.1, hinge wheel 7.5 is arranged on described transmission shaft 7.12 upper ends, passes through chain 7.4 connection for transmissions between hinge wheel 7.5 and minor sprocket 7.2.In order to improve safety performance of the present invention, described transmission shaft 7.12 upper end suit drive sleeve 7.6 are also passed through the flat key joint transmission, and hinge wheel 7.5 is arranged on drive sleeve 7.6 by shearing pin.Like this, when transmission shaft 7.12 is obstructed, can't rotate, during motor reducer 7.1 overload, shearing pin is cut off rapidly, has guaranteed whole plant safety.

Because transmission shaft 7.12 need to stretch into certain-length in body of heater, situation in actual use can shake, and axial stretching can appear owing to being heated in transmission shaft 7.12, so the present invention has added a set of for keeping the stable auxiliary support mechanism of transmission shaft 7.12 on transmission shaft 7.12.The structure of described auxiliary support mechanism as shown in figure 20, it mainly is comprised of guide pin bushing 7.14, lining 7.15, platen 7.16, connecting rod 7.17 and supporting seat 7.18, guide pin bushing 7.14 is fixed on transmission shaft 7.12, and platen 7.16 is assemblied in by lining 7.15 also can be in free rotation on guide pin bushing 7.14; Described platen 7.16 peripheries are provided with at least three, and along its circumferential uniform hinged-support, one end of at least three connecting rods 7.17 is hinged on hinged-support, the other end hinge supporting seat 7.18 of at least three connecting rods 7.17, and supporting seat 7.18 is supported on the inboard wall of furnace body surface.

Described structure of scraping charging tray 7.13 as shown in figure 20, its scraping rod 7.13b mainly be connected on center hub 7.13a by center hub 7.13a and Duo Gen forms, center hub 7.13a is fixed on transmission shaft 7.12 lower ends by fastening piece, and many scraping rod 7.13b along the circumferential direction are uniformly distributed on center hub 7.13a.In illustrated embodiment, described scraping rod 7.13b has eight, and it is upper that the end of eight is fixed on center hub 7.13a, forms the rice font structure.

Described cyclone dust collector 8 is for removing the contained impurity of biological fuel gas, dust and tar cooling biological fuel gas, so that the follow-up use of combustion gas.The structure of described cyclone dust collector 8 is as Figure 22, shown in Figure 23, it is mainly by support 8.1, primary cyclone 8.2 and secondary cyclone 8.3 form, described primary cyclone 8.2, secondary cyclone 8.3 supports by support 8.1, the blast pipe 8.4 of primary cyclone 8.2 is for passing into pending combustion gas, the exhaust duct 8.5 of primary cyclone 8.2 is connected with the blast pipe 8.4 of secondary cyclone 8.3 by bridge piece 8.6, the exhaust duct 8.5 of secondary cyclone 8.3 is transported to the next stage treatment facility for the combustion gas by after processing.

As Fig. 1, shown in Fig. 2, in the embodiment of the present invention, described primary cyclone 8.2 is identical with the structure of secondary cyclone 8.3, they include blast pipe 8.4, exhaust duct 8.5 and cylindrical shell 8.8, cylindrical shell 8.8 upper semisections are cylindrical, lower semisection is conical, blast pipe 8.4 is arranged on cylindrical shell 8.8, the direction that air-flow enters from blast pipe 8.4 is for tangential, exhaust duct 8.5 coaxially is arranged in cylindrical shell 8.8, exhaust duct 8.5 bottoms are shrunk to taper shape downwards gradually, the tube wall of exhaust duct 8.5 is provided with multiple tracks longer tuyere 8.9 along its length, described longer tuyere 8.9 preferably is set to single deflection grille, described multiple tracks longer tuyere 8.9 edge on the tube wall of exhaust duct 8.5 is circumferentially uniform, exhaust duct 8.5 lower end tube walls are provided with a plurality of along its circumferential uniform wind hole 8.10.The biomass fuel entraining air stream is spinned shape while rotatablely moving in cylindrical shell 8.8 inwalls of cyclonic separator and the space between exhaust duct 8.5 outer walls, portion gas in air-flow can enter exhaust duct 8.5 from longer tuyere 8.9, and dust impurity can't enter, thereby further improved the separating effect of cyclonic separator.

As shown in Figure 1, be provided with a sleeve body 8.7 that shape is suitable with it outside described cylindrical shell 8.8, between sleeve body 8.7 inwalls and cylindrical shell 8.8 outer walls, form water jacket, the water jacket bottom is provided with water-in, and water jacket top is provided with water outlet.During use, the water inlet of water jacket lower end, the upper end water outlet, cold water carries out heat exchange with the biological fuel gas entered in cyclonic separator, and biological fuel gas is cooling.In addition, described cylindrical shell 8.8 lower ends also are connected with a conic tube 8.11, and the bore of conic tube 8.11 upper ends is greater than the bore of cylindrical shell 8.8 lower ends, when air-flow rotates up along axle center, the dust impurity of above-mentioned structure in can barrier air, further improve dust removing effects.Described support 8.1 is welded by channel-section steel, and the leg 8.1a lower end of support 8.1 is welded with and keeps the stable steel plate 8.1b of support 8.1.

The concrete applicable cases of cyclone dust collector 8 is as follows: at first the biological fuel gas that contains impurity, dust and tar tangentially enters in primary cyclone 8.2 from the blast pipe 8.4 of primary cyclone 8.2, the biomass fuel entraining air stream shape of spinning in cylindrical shell 8.8 inwalls of primary cyclone 8.2 and the space between exhaust duct 8.5 outer walls rotatablely moves, the air-flow be rotated down is outer vortex, outer vortex arrives cylindrical shell 8.8 bottoms afterwards then makes progress, along axle center, rotate up, finally by exhaust duct 8.5, discharge, the air-flow that this strand rotates up is inside vortex.When air-flow rotates, cylindrical shell 8.8 inwalls that are thrown toward primary cyclone 8.2 under centrifugal action of the impurity in biological fuel gas, dust and tar, and along inwall, fall to flowing out under the promotion of vortex outside and action of gravity, via ash output hole, discharge.

Biological fuel gas after primary cyclone 8.2 is processed is upwards discharged from its exhaust duct 8.5, through bridge piece 8.6, tangentially enters in secondary cyclone 8.3 again, by secondary cyclone 8.3, carries out secondary treatment, and principle is the same.

After processing by primary cyclone 8.2 and secondary cyclone 8.3, the impurity contained in biological fuel gas, dust and tar are removed efficiently, and the while biological fuel gas also obtains cooling, so that the follow-up use of biological fuel gas.Certainly, be understandable that, the present invention can also continue the cyclonic separator of connecting, to reach more excellent treatment effect.

In addition, in fuel gas generating system of the present invention, also be provided with for further purifying also one-level tubular type inter cooler 9, electrical tar precipitator 10 and the secondary tubular type inter cooler 11 of cooling biological fuel gas, described one-level tubular type inter cooler 9 and secondary tubular type inter cooler 11 can be cooling quickly and evenly by high-temperature fuel gas, stopping state can not occur, clean and maintenance is convenient, and can the ash disposal decoking in a cold process, and collection bucket is arranged at bottom, tar and dust are collected, can in process of cooling, do not formed sewage.Described electrical tar precipitator 10 can efficiently catch the tar of removing in biological fuel gas, greatly improves the degree of purification of biological fuel gas.

The structure of described one-level tubular type inter cooler 9 is as shown in Figure 24, Figure 25, and it mainly is comprised of component such as bracing frame 9.1, main valve 9.2, water inlet pipe 9.3, water inlet pipe 9.4, a valve 9.5, water cooling box 9.6, relief pipe 9.7, decompression hand valve 9.8, the housing 9.10 of giving vent to anger, exit branch 9.11, funnel 9.12, rising pipe 9.13, air intake casing 9.15, aggregate pipe 9.16, collection bucket 9.17, the first valve 9.18, drainage conduit 9.19 and the second valves 9.20.

Described water cooling box 9.6 supports by bracing frame 9.1, water cooling box 9.6 is square, have six, these six stacked placements of water cooling box 9.6, between the casing 9.6a of all water cooling boxes 9.6, be tightly connected, the casing 9.6a bottom of bottom water cooling box 9.6 is equipped with the air intake casing 9.15 be communicated with inlet pipe 9.14, and topmost the casing 9.6a top of water cooling box 9.6 is equipped with the housing 9.10 of giving vent to anger; The both sides of described casing 9.6a front surface seal respectively installs water inflowing box 9.6b and water outlet box 9.6c, be provided with ten 9.6d of the serpentine tube in the different heights staggered arrangement in casing 9.6a, the two ends of ten serpentine tube 9.6d are communicated with described water inflowing box 9.6b and water outlet box 9.6c respectively, and water coolant can circulate from bottom to top in serpentine tube 9.6d; Described water inlet pipe 9.3 is arranged in bracing frame 9.1 and water cooling box 9.6 1 sides, and the water inflowing box 9.6b bottom on each water cooling box 9.6 is communicated with water inlet pipe 9.3 by water inlet pipe 9.4, and a valve 9.5 all is installed on each water inlet pipe 9.4; Rising pipe 9.13 is arranged in bracing frame 9.1 and water cooling box 9.6 opposite sides, an exit branch 9.11 is all installed on water outlet box 9.6c top on each water cooling box 9.6, the water outlet below of each exit branch 9.11 is provided with a funnel 9.12, and this funnel 9.12 is communicated with described rising pipe 9.13.

As shown in figure 24, in order to improve security of the present invention, the described housing 9.10 of giving vent to anger is provided with venting 9.9, and relief pipe 9.7 is installed on venting 9.9, and decompression hand valve 9.8 is installed on relief pipe 9.7.

As shown in figure 24, the bottom of described air intake casing 9.15 is connected with aggregate pipe 9.16, and aggregate pipe 9.16 lower ends connect collection bucket 9.17, and the first valve 9.18 open in usual is installed on aggregate pipe 9.16; Described collection bucket 9.17 bottoms are equipped with drainage conduit 9.19, and the second valve 9.20 of normally closed type is installed on drainage conduit 9.19.

During concrete application, need cooling biological fuel gas to enter in air intake casing 9.15 from inlet pipe 9.14, circulation, pass through each water cooling box 9.6 successively from bottom to top; Now, main valve 9.2 on water inlet pipe 9.3 is opened, water coolant flows into water inlet pipe 9.3, by each water inlet pipe 9.4, enter in each water cooling box 9.6, the circulation style that water coolant is pressed one-in-and-one-out, bottom in and top out in many serpentine tube 9.6d flows, finally from exit branch 9.11, flow out and fall in funnel 9.12, by funnel 9.12, flowing to rising pipe 9.13; Water coolant carries out heat exchange with biological fuel gas from bottom to top in the process of circulation, has realized between water coldly, reaches evenly cooling, the purpose of cooling, gradient cooling fast.In a cold process, the impurity such as the dust in biological fuel gas, tar also can effectively be removed, and the aggregate pipe 9.16 of bottom can be collected tar and dust, can in process of cooling, not form sewage.

What described electrical tar precipitator 10 adopted is commercially available conventional products.The structure of described secondary tubular type inter cooler 11 is identical with one-level tubular type inter cooler 9, so locate to repeat no more.

In actual production process; combustion gas filtering and purifying 12 is after work for some time; usually need to shut down cleaning; in order to guarantee to produce, carry out continuously; enhance productivity; the present invention has designed the combustion gas filtering and purifying 12 shown in Figure 26, and it mainly is comprised of air inlet pants pipe 12.1, valve 12.2, the first gas filter 12.3, the second gas filter 12.4 and the pants pipe 12.5 of giving vent to anger.

As shown in Figure 1, the supervisor of described air inlet pants pipe 12.1 is for air inlet, and the supervisor of the pants pipe 12.5 of giving vent to anger is for exhaust; An arm of air inlet pants pipe 12.1 is connected with the inlet mouth of the first gas filter 12.3 through a valve 12.2, and the air outlet of the first gas filter 12.3 is connected with an arm of the pants pipe 12.5 of giving vent to anger through another valve 12.2; Another arm of air inlet pants pipe 12.1 is connected with the inlet mouth of the second gas filter 12.4 through a valve 12.2, and the air outlet of the second gas filter 12.4 is connected with another arm of the pants pipe 12.5 of giving vent to anger through another valve 12.2.Preferably, described valve 12.2 adopts Hand-operated butterfly valve.The supervisor of described air inlet pants pipe 12.1, the pants pipe 12.5 of giving vent to anger is identical with the caliber of arm.Described the first gas filter 12.3, the second gas filter 12.4 can adopt commercially available matured product.

During concrete application, air inlet pants pipe 12.1 and give vent to anger pants pipe 12.5 one side branch in closing condition, the biological fuel gas that contains impurity, dust and a small amount of tar enters in the supervisor of air inlet pants pipe 12.1, enter the pants pipe 12.5 of giving vent to anger from a side branch wherein after the first gas filter 12.3 filters, then discharge from the supervisor of the pants pipe 12.5 of giving vent to anger.

When the first gas filter 12.3 uses for some time to clear up, close the valve 12.2 at the first gas filter 12.3 two ends, open the valve 12.2 at the second gas filter 12.4 two ends, contain impurity, the biological fuel gas of dust and a small amount of tar can carry out the filtration, purification processing by the second gas filter 12.4, the first gas filter 12.3 can synchronously be cleared up upkeep operation, cross-reference the first gas filter 12.3 like this and the second gas filter 12.4, just can in not blowing out situation, complete the filtration unit cleaning operation, guarantee to produce and carry out continuously, enhance productivity.

Described one-level moisture separator 13 can efficiently be removed moisture contained in biological fuel gas cooling biological fuel gas, so that the follow-up use of biological fuel gas.The structure of described one-level moisture separator 13 is as 27, as shown in Figure 28, and it mainly is comprised of cyclonic separator 13.1, support 13.2, pipeline 13.3, water tank 13.4 and upflow tube 13.5.Described cyclonic separator 13.1 supports by support 13.2, the blast pipe 13.1a of cyclonic separator 13.1 is for passing into the biological fuel gas that contains moisture, the exhaust duct 13.1b of cyclonic separator 13.1 is transported to the next stage treatment facility for the biological fuel gas that will separate after moisture, the liquid outlet of cyclonic separator 13.1 bottoms is connected with pipeline 13.3, and these pipeline 13.3 lower ends are stretched in water tank 13.4.

Described cyclonic separator 1 is mainly by blast pipe 13.1a, exhaust duct 13.1b and cylindrical shell 13.1c form, cylindrical shell 13.1c upper semisection is cylindrical, lower semisection is conical, blast pipe 13.1a is arranged on cylindrical shell 13.1c, the direction that air-flow enters from blast pipe 13.1a is for tangential, exhaust duct 13.1b coaxially is arranged in cylindrical shell 13.1c, exhaust duct 13.1b bottom is shrunk to taper shape downwards gradually, the tube wall of exhaust duct 13.1b is provided with multiple tracks longer tuyere 13.1e along its length, described multiple tracks longer tuyere 13.1e edge on the tube wall of exhaust duct 13.1b is circumferentially uniform, exhaust duct 13.1b lower end tube wall is provided with a plurality of along its circumferential uniform wind hole 13.1f.Described longer tuyere 13.1e preferably is set to single deflection grille, the biomass fuel entraining air stream is spinned shape while rotatablely moving in the cylindrical shell 13.1c inwall of cyclonic separator and the space between exhaust duct 13.1b outer wall, portion gas in air-flow can enter exhaust duct 13.1b from longer tuyere 13.1e, and moisture impurity etc. can't enter, thereby further improved the separating effect of cyclonic separator 13.1.

Described support 13.2 is welded by channel-section steel, and the leg 13.2a lower end of support 13.2 is welded with and keeps the stable steel plate 13.2b of support 13.2.

During concrete application, the biological fuel gas that contains moisture tangentially enters in cyclonic separator 13.1 via blast pipe 13.1a, the shape of spinning in the space of biomass fuel entraining air stream between cylindrical shell 13.1c inwall and exhaust duct 13.1b outer wall rotatablely moves, the air-flow be rotated down is outer vortex, outer vortex is transferred upwards after arriving cylindrical shell 13.1c bottom, rotate up along axle center, discharge finally by exhaust duct 13.1b, the air-flow that this strand rotates up is inside vortex.When air-flow rotates, the moisture in biological fuel gas is thrown toward the cylindrical shell 13.1c inwall of cyclonic separator 13.1 under centrifugal action, and along inwall, falls to flowing out under the promotion of vortex outside and action of gravity, via pipeline 13.3, flows in water tank 13.4.So just removed efficiently the moisture in the biological fuel gas, the while biological fuel gas also obtains cooling, so that the follow-up use of biological fuel gas.

Because the moisture in biological fuel gas constantly is collected in water tank 13.4, water in water tank 13.4 is cumulative, for carrying out smoothly of guaranteeing to produce, the present invention is provided with shown in upflow tube 13.5 Fig. 1 on the top of water tank 13.4, water is collected when a certain amount of and is flowed out by upflow tube 13.5, thereby the liquid levels in water tank 13.4 can be maintained to certain altitude all the time.

Because the structure of described second level moisture separator 14 is identical with one-level moisture separator 13, so locate do not repeating.

Described gas transmission gas storage piping system comprises connecting tube, roots blower 15, smoke evacuation purification of combustion device 16 and coal gas surge tank 17, the outlet of described second level moisture separator 14 is connected respectively with smoke evacuation purification of combustion device 16, coal gas surge tank 17 by connecting tube, described roots blower 15 is arranged on connecting tube, for carrying capacity is provided, described smoke evacuation purification of combustion device 16 is for removing the detrimental impurity composition of Exhaust Gas, and described coal gas surge tank 17 is for temporary biological fuel gas.

During biomass gasifying furnace point of beginning stove, before normal production, the air in stove and in pipeline must be driven away, be called for short emptying.Can guarantee the quality of final combustion gas like this, protect equipment simultaneously.In this emptying phase process, contain grey cigarette and a small amount of foreign gas that air is had to pollution in expellant gas, smoke evacuation purification of combustion device 16 of the present invention is exactly to contain grey cigarette and a small amount of foreign gas that air is had to pollution in order to remove in Exhaust Gas.The structure of smoke evacuation purification of combustion device 16 is as shown in Figure 29, Figure 30, and it mainly is comprised of component such as blower fan 16.1, air inlet pipeline 16.2, supporting tube 16.3, bridge piece 16.4, nozzles with injector 16.5, the second pipe fitting 16.6, lower high temperature steel dividing plate 16.7, refractory masses 16.8, upper high temperature steel dividing plate 16.9, upper flat flame burner 16.10, burner block 16.11, the first pipe fitting 16.12, cigarette pipe connecting 16.13, chimney pipe 16.14, support bar 16.15, stack cover 16.16 and lower flat flame burners 16.17.

As shown in Figure 29, Figure 30, blower fan 16.1 connects air inlet pipeline 16.2, and the burning purification pipe supports by supporting tube 16.3, and burning purification pipe lower end import is connected with foreign gas access tube 16.19, for passing into pending foreign gas; The outlet of burning purification pipe upper end connects stovepipe 16.14, is provided with stack cover 16.16 directly over stovepipe 16.14, and stack cover 16.16 is fixed on stovepipe 16.14 by support bar 16.15; Described burning purification pipe inwall is provided with refractory masses 16.8, lower flat flame burner 16.17 is arranged on a side of burning purification pipe bottom, upper flat flame burner 16.10 is arranged on the opposite side on burning purification pipe top, be provided with burner block 16.11 around lower flat flame burner 16.17, upper flat flame burner 16.10, the air intlet of lower flat flame burner 16.17, upper flat flame burner 16.10 is communicated with air inlet pipeline 16.2 respectively, and the fuel gas inlet of lower flat flame burner 16.17, upper flat flame burner 16.10 is communicated with gas line 16.19 respectively; Lower high temperature steel dividing plate 16.7 is arranged on the bottom in the burning purification pipe, is positioned under lower flat flame burner 16.17, and the side near lower flat flame burner 16.17 on lower high temperature steel dividing plate 16.7 is provided with ventilating pit; Upper high temperature steel dividing plate 16.9 is arranged on the middle part of burning in purification pipe, is positioned on lower flat flame burner 16.17, under upper flat flame burner 16.10, and the side near upper flat flame burner 16.10 on upper high temperature steel dividing plate 16.9 is provided with ventilating pit.

Described lower high temperature steel dividing plate 16.7 and upper high temperature steel dividing plate 16.9 can stop pending foreign gas, make foreign gas stop the more time in the burning purification pipe, ventilating pit on lower high temperature steel dividing plate 16.7 is near lower flat flame burner 16.17, ventilating pit on upper high temperature steel dividing plate 16.9 is near upper flat flame burner 16.10, can make like this foreign gas more close burner when circulation, make the foreign gas burning purify more abundant.Can add retaining frame or stay cord according to field condition on described stovepipe 16.14.

As shown in figure 29, burning purification pipe in embodiment mainly is comprised of the first pipe fitting 16.12 connected by flange and the second pipe fitting 16.6, the upper end of the first pipe fitting 16.12 is conical, and its top is provided with pipe connecting 16.13, and pipe connecting 16.13 upper ends are connected with described stovepipe 16.14; The second pipe fitting 16.6 supports by supporting tube 16.3, and the lower end of the second pipe fitting 16.6 is conical, and its bottom is provided with bridge piece 16.4, and bridge piece 16.4 is connected with foreign gas access tube 16.19.

As shown in figure 29, described burning purification pipe bottom is provided with the nozzles with injector 16.5 that spout makes progress, and nozzles with injector 16.5 is near lower flat flame burner 16.17 one sides on the burning purification pipe, and nozzles with injector 16.5 is communicated with described air inlet pipeline 16.2.When burning purification foreign gas, stop tempering phenomenon, for this reason, the present invention has designed nozzles with injector 16.5, by from nozzles with injector 16.5 ejection air-flows, guarantees that the flame in combustion burning purification pipe makes progress, the security that has improved equipment; In addition, in order to ensure the suction force of chimney, it is higher that the height of chimney need to design usually, and nozzles with injector 16.5 of the present invention can also provide suction force, can guarantee greatly to reduce the design height of chimney under the condition that suction force meets the demands, reduce equipment cost.

In addition, between described burning purification pipe lower end import and foreign gas access tube 16.19, clamped one deck Stainless Steel Wire screen cloth, the Stainless Steel Wire screen cloth also can prevent tempering.The invention provides double insurance thereby give.Preferably, the string diameter of described Stainless Steel Wire screen cloth is 0.6mm, and the order number is 10 orders.

In the present invention, the composition of described refractory masses 16.8 preferably adopts refractory fibre, as aluminosilicate property refractory fibre, polycrystalline alumina fiber, mullite fiber or Zirconium oxide fibre etc.

The concrete applicable cases of smoke evacuation purification of combustion device 16 is as follows: in the emptying process, need foreign gas to be processed to enter in the burning purification pipe via foreign gas access tube 16.18, bridge piece 16.4.Blower fan 16.1 starts simultaneously, air is provided to respectively lower flat flame burner 16.17, upper flat flame burner 16.10 and nozzles with injector 16.5, lower flat flame burner 16.17, upper flat flame burner 16.10 are introduced combustion gas by gas line 16.19, lower flat flame burner 16.17,16.10 igniting of upper flat flame burner.Pass into the foreign gas of burning in purification pipe first from upwards circulation of ventilating pit on high temperature steel dividing plate 16.7, wherein a part of impurity component is purified by lower flat flame burner 16.17 burnings, and then from upwards circulation of ventilating pit on high temperature steel dividing plate 16.9, a part of impurity component is purified by upper flat flame burner 16.10 burnings in addition, finally by by pipe connecting 16.13 and stovepipe 16.14, being expelled to atmosphere; Described nozzles with injector 16.5 plays the effect that prevents tempering and suction force is provided in the process of circulation of foreign gas.

Claims

1. biomass fuel gas generating system, it is characterized in that: comprising: the feeding unit be connected successively with processing sequence by the combustion gas generation (1), biomass gasifying furnace, after-treatment system and gas transmission gas storage piping system, described biomass gasifying furnace has fuel inlet and gas outlet, the burning import is connected with feeding unit (1), and gas outlet is communicated with after-treatment system by connecting tube, described after-treatment system comprises cyclone dust collector (8), one-level tubular type inter cooler (9), electrical tar precipitator (10), secondary tubular type inter cooler (11), filtering and purifying (12), one-level moisture separator (13) and second level moisture separator (14), the import of cyclone dust collector (8) is connected with the gas outlet of biomass gasifying furnace by connecting tube, the outlet of cyclone dust collector (8) is divided into two branch roads, by connecting tube, with the import of two one-level tubular type inter coolers (9), be connected respectively, the outlet of these two one-level tubular type inter coolers (9) is connected with the import of same electrical tar precipitator (10) by connecting tube respectively, the outlet of described electrical tar precipitator (10) is divided into two branch roads, by connecting tube, with the import of two secondary tubular type inter coolers (11), be connected respectively, the outlet of these two secondary tubular type inter coolers (11) is connected with the import of filtering and purifying (12) by connecting tube respectively again, the outlet of described filtering and purifying (12) is connected with the import of one-level moisture separator (13) by connecting tube, the outlet of this one-level moisture separator (13) is connected with the import of second level moisture separator (14) by connecting tube, the outlet of this second level moisture separator (14) connects gas transmission gas storage piping system again,

Also be provided with the scraper (7) for fuel charge level height is consistent in described body of heater; Described scraper (7) comprises transmission shaft (7.12), scrapes materials and parts and driving mechanism, transmission shaft (7.12) inserts in body of heater downwards by the furnace roof center, installation is supported by supporting component in transmission shaft (7.12) upper end, transmission shaft (7.12) relies on driving mechanism to drive rotation, and the described charging tray (7.13) of scraping is fixed on transmission shaft (7.12) lower end.

2. biomass fuel gas generating system as claimed in claim 1 is characterized in that: described biomass gasifying furnace comprises furnace binding (2), grey disc mechanism (3), goes out ash bucket (4), ash convenyer structure (5) and admission passage (6);

Described furnace binding (2) comprises urceolus (2.4), inner core (2.2), annular flange (2.1), the first ring flat-plate (2.9), the second ring flat-plate (2.11) ash-stopping ring (2.16), scrape hawk (2.15) and water seal circle (2.14), inner core (2.2) is placed in upper part of urceolus (2.4), inner core (2.2) edge, upper end and urceolus (2.4) edge, upper end are by annular flange (2.1) welded seal, pass through the first ring flat-plate (2.9) welded seal between inner core (2.2) edge, lower end and urceolus (2.4) inwall, form water jacket between inner core (2.2) outer wall and urceolus (2.4) inwall, on urceolus (2.4) wall, be provided with corresponding to the water-in (2.18) of water jacket bottom with corresponding to the water return outlet (2.19) on water jacket top, lower part inner wall surface of described urceolus (2.4) is provided with refractory heat-insulating wall body (2.6), described the second ring flat-plate (2.11) is weldingly fixed on urceolus (2.4) edge, lower end, and ash-stopping ring (2.16) and water seal circle (2.14) are coaxial to be arranged, and is welded on the second ring flat-plate (2.11) bottom, and ash-stopping ring (2.16) is interior, and water seal circle (2.14) outside, polylith is scraped that hawk (2.15) is welded on ash-stopping ring (2.16) inwall and is uniformly distributed along the circumferential direction of ash-stopping ring (2.16), described body of heater middle part is provided with the opening for feed (2.22) for adding biomass fuel, described opening for feed (2.22) communicates with inner core (2.2) inside, described upper of furnace body is provided with the air outlet (2.3) for inputting biological fuel gas, and described air outlet (2.3) communicate with inner core (2.2) inside,

Described grey disc mechanism (3) is arranged under furnace binding (2), and grey disc mechanism (3) comprises water seal inner ring (3.7), water seal outer ring (3.8), base plate (3.15), chassis (3.4), gas-distributing pipe (3.1), blast cap assembly, keeps off grey cutter (3.16), water seal slotting tool (3.14), center ring flat-plate (3.18) and grate (3.21); Water seal inner ring (3.7) and water seal outer ring (3.8) coaxial setting, jointly be welded on base plate (3.15) upper surface, form annular seal-water tank between water seal inner ring (3.7) and water seal outer ring (3.8), the water seal circle (2.14) of described bottom of furnace body inserts downwards in this annular seal-water tank; The inwall of described water seal inner ring (3.7) is provided with a plurality of along the circumferential direction equally distributed bearings (3.17), chassis (3.4) is shelved on bearing (3.17) and goes up and use bearing pin (3.5) to be connected with bearing (3.17), and grate (3.21) is placed on chassis (3.4); The center on described chassis (3.4) is provided with through hole, and gas-distributing pipe (3.1) is located in this through hole, gas-distributing pipe (3.1) top closure, and the perisporium on gas-distributing pipe (3.1) top is provided with pore; Described blast cap assembly is sleeved on gas-distributing pipe (3.1) and goes up and rely on center ring flat-plate (3.18) to support, and it is upper that center ring flat-plate (3.18) is fixed on chassis (3.4), and the ventilation gaps in the blast cap assembly communicates with the pore on gas-distributing pipe (3.1); The gear ash cutter (3.16) of annular and annular coaxial setting of water seal slotting tool (3.14), be welded on respectively on the lower surface of described base plate (3.15); The sidewall on top, described water seal outer ring (3.8) is provided with upflow tube (3.6), be provided with funnel (3.9) under upflow tube (3.6) outlet, the water in the upper annular seal-water tank of grey disc mechanism (3) can flow into below downwards through funnel (3.9) and go out in the annular seal-water tank on ash bucket (4);

Describedly go out ash bucket (4) and be arranged under grey disc mechanism (3), go out ash bucket (4) and comprise urceolus (4.8), inner core (4.7), flange (4.5) and flanged pipe (4.6), urceolus (4.8) and inner core (4.7) are pyramidal structure, their edge, upper end is weldingly fixed on flange (4.5) lower surface, be filled with heat-insulating heat-preserving material (4.10) between urceolus (4.8) and inner core (4.7), inner core (4.7) lower ending opening is ash output hole (4.12); Both sides on described urceolus (4.8) and inner core (4.7) are respectively arranged with flanged pipe (4.6), and the axle center of both sides flanged pipe (4.6) is on same axis, and flanged pipe (4.6) passes through for admission passage (6); Be welded with inner ring (4.1) and outer ring (4.2) of coaxial setting on the upper surface of described flange (4.5), form annular seal-water tank between inner ring (4.1) and outer ring (4.2), this annular seal-water tank coordinates for the water seal slotting tool (3.14) on the grey disc mechanism (3) with top, realizes water-lute; Be provided with return water pipe (4.13) on the annular seal-water tank sidewall, be provided with a plurality of along the circumferential direction equally distributed support running rollers (4.3) in annular seal-water tank, described support running roller (4.3) supports by its base (4.4), for the grey disc mechanism (3) of rest top;

Described ash convenyer structure (5) is arranged on out ash bucket (4) below, and ash convenyer structure (5) comprises bearing (5.1), housing (5.5), upper flange lid (5.3), lower flange lid (5.9), rotating shaft (5.6), the first sealed bearing assembly, the second sealed bearing assembly and driving mechanism; Described bearing (5.1) has an inclination mounting face, housing (5.5) is arranged on the inclination mounting face, housing (5.5) lower end is provided with opening up ash inlet (5.8), this ash inlet (5.8) is connected with the described ash output hole (4.12) that goes out ash bucket (4), and housing (5.5) upper end is provided with downward opening ash output hole (5.2); Described housing (5.5) is double-deck water jacket housing (5.5), and housing (5.5) bottom, lower end is provided with water-in (5.13), and housing (5.5) top, upper end is provided with water outlet (5.4); Described housing (5.5) upper end is equipped with upper flange lid (5.3), lower end is equipped with lower flange lid (5.9), rotating shaft (5.6) is arranged in housing (5.5), rotating shaft (5.6) upper end is supported and is arranged on upper flange lid (5.3) by the first sealed bearing assembly, rotating shaft (5.6) lower end is supported and is arranged on lower flange lid (5.9) by the second sealed bearing assembly, rotating shaft (5.6) drives rotation by driving mechanism, and rotating shaft (5.6) is provided with the flight (5.7) for delivery of lime-ash;

Described admission passage (6) comprises blower fan (6.1), check valve (6.2), the first tracheae (6.3), high temperature resistant tracheae (6.8) and main tracheae (6.9); The air outlet of blower fan (6.1) is connected with the blast inlet of check valve (6.2), and the air outlet of check valve (6.2) is connected with the first tracheae (6.3) one ends, and the first tracheae (6.3) the other end is connected with high temperature resistant tracheae (6.8) one ends; Described high temperature resistant tracheae (6.8) directly is located in going out in ash bucket (4) of biomass gasifying furnace, high temperature resistant tracheae (6.8) is double-deck mechanism, it comprises outer tube (6.8a) and interior tracheae (6.8b), form water jacket between outer tube (6.8a) and interior tracheae (6.8b), be connected with mobile water coolant in water jacket; Described interior tracheae (6.8b) end is communicated with described the first tracheae (6.3), interior tracheae (6.8b) middle part is communicated with main tracheae (6.9), main tracheae (6.9) upwards insert in grey disc mechanism (3) gas-distributing pipe (3.1) in, for air being sent into to zone of combustion in biomass gasifying furnace below.

3. biomass fuel gas generating system as claimed in claim 1, it is characterized in that: in described furnace binding (2), bottom of furnace body by pipe support (2.20) be equipped with many for heeling-in the heat-resisting thin permeability cell (2.21) in zone of combustion, described many heat-resisting thin permeability cells (2.21) upwards are uniformly distributed along week on a plurality of circumference, the pipe top of heat-resisting thin permeability cell (2.21) is provided with tapered cap, and the tube wall of heat-resisting thin permeability cell (2.21) is provided with a plurality of for aperture ventilative in zone of combustion; The described hawk (2.15) of scraping, for elongated plates, is scraped the length direction of hawk (2.15) along ash-stopping ring (2.16) radially, and width and the vertical direction of scraping hawk (2.15) form the angle of 3 °; Described body of heater is provided with the flare type joint (2.7) be connected with inner core (2.2) inside; Be provided with an enforced loop plane coaxial with it (2.17) in described ash-stopping ring (2.16), the inner that described polylith is scraped hawk (2.15) all is weldingly fixed on enforced loop plane (2.17); Be provided with stiffening plate (2.5) between described inner core (2.2) outer wall and urceolus (2.4) inwall, be provided with the first reinforcement gusset (2.10) between described the second ring flat-plate (2.11) upper surface and urceolus (2.4) inwall, be provided with the second reinforcement gusset (2.12) between described water seal circle (2.14) outer wall and the second ring flat-plate (2.11) lower surface, be provided with the 3rd between described ash-stopping ring (2.16) outer wall and water seal circle (2.14) inwall and strengthen gusset (2.13); Described refractory heat-insulating wall body (2.6) adopts the refractory castable cast to form or be built into by refractory brick.

4. biomass fuel gas generating system as claimed in claim 2, it is characterized in that: in described grey disc mechanism (3), the blast cap assembly comprises the blast cap (3.2) of at least two stacked settings, described blast cap (3.2) shape is identical, for taper barrel, but size is bottom-up, reduce gradually, it is upper that nethermost blast cap (3.2) is fixed on center ring flat-plate (3.18) by retaining plate (3.3), and the blast cap of last layer (3.2) is fixed on the upper surface of lower one deck blast cap (3.2) by retaining plate (3.3); Blast cap assembly in described water seal inner ring (3.7) is arranged with air loop duct outward, and described air loop duct is connected with admission passage (6); The bottom on described chassis (3.4) is provided with lime scraping knife (3.20), and lime scraping knife (3.20) length direction is the inclined to one side 5 degree angles of the sense of rotation of (3.4) to chassis; Be provided with along the circumferential direction equally distributed outer gusset (3.11) of polylith between the upper surface of the outer wall of described water seal outer ring (3.8) and base plate (3.15), it is upper that the outer end of the outer gusset (3.11) of described polylith all is welded on same ring flat-plate (3.10), and this ring flat-plate (3.10) is weldingly fixed on base plate (3.15); Bottom between described water seal inner ring (3.7) outer wall and water seal outer ring (3.8) inwall is provided with along the circumferential direction equally distributed inner reinforced plate (3.13) of polylith; Described base plate (3.15) lower surface is provided with for receiving the sawtooth circle (3.12) of motivating force; Described gas-distributing pipe (3.1) lower end is fitted with gear ash cover (3.19).

5. biomass fuel gas generating system as claimed in claim 2 is characterized in that: describedly go out in ash bucket (4), heat-insulating heat-preserving material (4.10) adopts aluminum silicate fiber; The described tapering (α) that goes out ash bucket (4) is 45 ~ 80 degree; Described ash output hole (4.12) is rectangle, and the inwall of described inner core (4.7) lower part is made as four planes, and these four planes are the four edges of corresponding rectangle ash output hole (4.12) respectively; The described middle part that goes out ash bucket (4) is provided with vision slit (4.9), and described lower part that goes out ash bucket (4) is provided with access opening (4.11).

6. biomass fuel gas generating system as claimed in claim 1, it is characterized in that: in described ash convenyer structure (5), driving mechanism adopts deceleration direct-current machine (5.12), the output shaft of deceleration direct-current machine (5.12) is by shaft coupling (5.11) and rotating shaft (5.6) connection for transmission, and rotating shaft (5.6) lower end is supported by bearing support (5.10), described the first sealed bearing assembly comprises gland (5.15), round nut (5.16), clutch shaft bearing (5.17), clutch shaft bearing seat (5.18) and the first felt collar (5.19), clutch shaft bearing seat (5.18) is fixed on upper flange lid (5.3), clutch shaft bearing (5.17) support assemblies is passed through in clutch shaft bearing seat (5.18) in rotating shaft (5.6) upper end, clutch shaft bearing (5.17) is locked by round nut (5.16) and is passed through gland (5.15) sealing, and first felt collar (5.19) of sealing use is housed between rotating shaft (5.6) and clutch shaft bearing seat (5.18), described the second sealed bearing assembly comprises the second bearing support (5.20), the second bearing (5.21), step cover (5.22) and stuffing box (5.24), the second bearing support (5.20) is fixed on lower flange lid (5.9), the second bearing (5.21) support assemblies is passed through in the second bearing support (5.20) in rotating shaft (5.6) lower end, the second bearing (5.21) compresses by step cover (5.22), step cover (5.22) is fixed by bolts on the second bearing support (5.20), rotating shaft (5.6) and the second bearing support (5.20), second felt collar (5.23) of sealing use is housed respectively between step cover (5.22), stuffing box (5.24) is arranged on step cover (5.22) outside, described ash output hole (5.2) connects Blowing stopper, on ash output hole (5.2) side, is provided with pressure tap (5.14).

7. biomass fuel gas generating system as claimed in claim 2, it is characterized in that: the zone of combustion below in described biomass gasifying furnace also is provided with annular gas pipe, and described high temperature resistant tracheae (6.8) the other end is communicated with annular gas pipe by the second tracheae (6.11), the 3rd tracheae (6.12) successively; Described high temperature resistant tracheae (6.8) one ends are provided with into the water interface, and the other end is provided with the backwater interface, and the water inlet interface is communicated with cooling basin by suction culvert (6.10), and the backwater interface connects water return pipeline, and suction pump is installed on water return pipeline; Be provided with temperature element (6.4), venting (6.5) and pressure measurement interface (6.6) on described the first tracheae (6.3), be fitted with aluminium foil explosive-proof protector film on venting (6.5), pressure measurement interface (6.6) is for connecting pressure instrumentataion; Described the first tracheae (6.3) road is provided with steam access tube (6.7).

8. biomass fuel gas generating system as claimed in claim 1, it is characterized in that: described feeding unit (1) comprises blanking device and feeding conveyor, described blanking device comprises Connection Block (1.1), lower shell (1.2), bell jar valve body (1.3), valve seat (1.4), conical seat (1.5), upper shell (1.6), supporting sealing frame (1.14), the first bar (1.16), the second bar (1.13), chain cover (1.17), hang chain (1.7) and bracket institution, lower shell (1.2) supports by bracket institution, lower shell (1.2) lower end is installed with the Connection Block (1.1) for connecting feeding conveyor, lower shell (1.2) upper end is connected with upper shell (1.6) lower end by flange, in conical seat (1.5) edge, upper end and upper shell (1.6) lower end, edge is welded and fixed, valve seat (1.4) is arranged on conical seat (1.5) lower end, supporting sealing frame (1.14) is arranged on upper shell (1.6) outer wall, in supporting sealing frame (1.14), is provided with rotating shaft (1.15), described the first bar (1.16) one ends are arranged on rotating shaft (1.15) and go up and follow the synchronous rotation of rotating shaft (1.15), the first bar (1.16) the other end is installed chain cover (1.17), chain cover (1.17) is upper hangs bell jar valve body (1.3) by hanging chain (1.7), this bell jar valve body (1.3) matches with described valve seat (1.4), controls biomass fuel and enters, described the second bar (1.13) one ends are arranged on rotating shaft (1.15) and go up and follow the synchronous rotation of rotating shaft (1.15), the second bar (1.13) the other end hinge pull bar (1.12).

9. biomass fuel gas generating system as claimed in claim 8, it is characterized in that: described bracket institution comprises toroidal frame (1.8), link span (1.9), auxiliary bracing frame (1.10), bearing (1.18) and column (1.11), toroidal frame (1.8) is fixed on lower shell (1.2) periphery wall, be distributed with two in lower shell (1.2) both sides and be the column (1.11) that 180 degree are arranged symmetrically with, column (1.11) upper end welding bearing (1.18), toroidal frame (1.8) is stated in bearing (1.18) rest residence; It is upper that described link span (1.9) is fixed on toroidal frame (1.8), and it is upper that link span (1.9) is fixed on auxiliary bracing frame (1.10), and auxiliary bracing frame (1.10) is fixed on top of gasification furnace; The tapering of described bell jar valve body (1.3) is 50 ~ 75 degree.

10. biomass fuel gas generating system as claimed in claim 8, it is characterized in that: described feeding conveyor comprises housing (1.19), main drive shaft (1.37), driven shaft (1.32), drive sprocket (1.38), driven sprocket (1.31), chain band (1.28), scraper plate (1.29), bed of material walking plate (1.30) and driving mechanism, described housing (1.19) is microscler, housing (1.19) top is provided with the opening for feed for being connected with Connection Block (1.1) lower end, described housing (1.19) one ends are installed main drive shaft (1.37) by the first bearing assembly, housing (1.19) the other end is installed driven shaft (1.32) by the second bearing assembly, described main drive shaft (1.37) is positioned at the two ends of housing (1.19) drive sprocket (1.38) is installed respectively, described driven shaft (1.32) is positioned at the two ends of housing (1.19) driven sprocket (1.31) is installed respectively, respectively pass through a chain band (1.28) connection for transmission between two driven sprockets (1.31) and two drive sprockets (1.38), be provided with some scraper plates (1.29) between described two chain bands (1.28), scraper plate (1.29) two ends are connected to two chain bands (1.28) and go up and follow chain band (1.28) and be synchronized with the movement, bed of material walking plate (1.30) is horizontally set in housing (1.19) along the length direction of housing (1.19), described scraper plate (1.29) base near but do not contact bed of material walking plate (1.30) upper surface.

11. biomass fuel gas generating system as claimed in claim 10 is characterized in that: also be provided with the strainer for two chain bands of tensioning (1.28) on described feeding conveyor; Described strainer has two covers, the corresponding chain band of tensioning (1.28) of every cover strainer, single cover strainer comprises wheel carrier (1.21) and tightener sprocket (1.22), described wheel carrier (1.21) is microscler, wheel carrier offers the installation slotted hole on (1.21), wheel carrier (1.21) is fastened on housing (1.19) by the bolt part be contained in this installation slotted hole, described tightener sprocket (1.22) is arranged on wheel carrier (1.21) upper end, and tightener sprocket (1.22) is with chain band (1.28) engagement and by chain band (1.28) tensioning.

12. biomass fuel gas generating system as claimed in claim 10, it is characterized in that: described the first bearing assembly comprises front gland seat (1.34), front gland (1.33), rear pressing cover seat (1.39) and rear pressing cover (1.40), front gland seat (1.34), rear pressing cover seat (1.39) is separately fixed on the front and back sidewall of housing (1.19), front gland (1.33) is contained on front gland seat (1.34), rear pressing cover (1.40) is contained on rear pressing cover seat (1.39), described main drive shaft (1.37) two ends are assemblied in front gland (1.33) by sleeve supporting respectively, in rear pressing cover (1.40), described the second bearing assembly comprises two bearing supports (1.41), and two bearing supports (1.41) are separately positioned on the front and back side of housing (1.19), and the two ends of described driven shaft (1.32) are assemblied in two bearing supports (1.41) by sleeve supporting respectively.

13. biomass fuel gas generating system as claimed in claim 10, it is characterized in that: described driving mechanism comprises motor (1.36) and step-down gear (1.35), step-down gear (1.35) is fixedly mounted on housing (1.19) top by speed reducer base (1.26), motor (1.36) is connected with step-down gear (1.35), and drive sprocket (1.27) is installed on the output shaft of step-down gear (1.35); The shaft extension end of described main drive shaft (1.37) is equipped with driving chain wheel (1.24), and this driving chain wheel (1.24) passes through chain (1.25) connection for transmission with described drive sprocket (1.27); Described step-down gear (1.35) adopts cycloidal planetary gear speed reducer (1.35); Upper end and the bottom near opening for feed one end of described housing (1.19) is respectively equipped with opening, the opening of housing (1.19) end seals by dismountable valve gap (1.23) and sealing-ring, and the opening of housing (1.19) bottom seals by dismountable cover plate (1.20) and sealing-ring.

14. biomass fuel gas generating system as claimed in claim 1, it is characterized in that: described supporting component comprises mount pad (7.11), thrust ball bearing (7.10), deep groove ball bearing (7.8) and gland (7.7), mount pad (7.11) is fixed on furnace roof, the axle journal of transmission shaft (7.12) upper end is contained in the centre hole of mount pad (7.11), thrust ball bearing (7.10) is sleeved on axle journal and, by nut (7.9) locking, two seat rings of thrust ball bearing (7.10) contact respectively and support mount pad (7.11) and nut (7.9); Deep groove ball bearing (7.8) is sleeved on axle journal, and the inside and outside circle of deep groove ball bearing (7.8) contacts respectively and supports axle journal and mount pad (7.11); It is upper that gland (7.7) is arranged on mount pad (7.11), and gland (7.7) is encapsulated in thrust ball bearing (7.10) and deep groove ball bearing (7.8) in the centre hole of mount pad (7.11); Clamped paronite (7.19) between described mount pad (7.11) and furnace roof, between described mount pad (7.11) and transmission shaft (7.12), sealing-ring (7.20) has been housed.

15. biomass fuel gas generating system as claimed in claim 1, it is characterized in that: described driving mechanism comprises motor reducer (7.1), minor sprocket (7.2), hinge wheel (7.5) and chain (7.4), motor reducer (7.1) is supported and fixed on furnace roof by bearing (7.3), minor sprocket (7.2) is arranged on the output shaft of motor reducer (7.1), hinge wheel (7.5) is arranged on described transmission shaft (7.12) upper end, passes through chain (7.4) connection for transmission between hinge wheel (7.5) and minor sprocket (7.2); Described transmission shaft (7.12) upper end suit drive sleeve (7.6) is also passed through the flat key joint transmission, and hinge wheel (7.5) is arranged on drive sleeve (7.6) by shearing pin.

16. the scraper of biomass gasifying furnace as claimed in claim 1 (7) is characterized in that: be provided with on described transmission shaft (7.12) for keeping the stable auxiliary support mechanism of transmission shaft (7.12); Described auxiliary support mechanism comprises guide pin bushing (7.14), lining (7.15), platen (7.16), connecting rod (7.17) and supporting seat (7.18), it is upper that guide pin bushing (7.14) is fixed on transmission shaft (7.12), and platen (7.16) is assemblied in guide pin bushing (7.14) above by lining (7.15) and can be in free rotation; Described platen (7.16) periphery is provided with at least three along its circumferential uniform hinged-support, one end of at least three connecting rods (7.17) is hinged on hinged-support, the other end hinge supporting seat (7.18) of at least three connecting rods (7.17), supporting seat (7.18) is supported on the inboard wall of furnace body surface; The described charging tray (7.13) of scraping comprises center hub (7.13a) and the many scraping rods (7.13b) that are connected on center hub (7.13a), center hub (7.13a) is fixed on transmission shaft (7.12) lower end by fastening piece, and many scraping rods (7.13b) along the circumferential direction are uniformly distributed on center hub (7.13a).

17. biomass fuel gas generating system as claimed in claim 1, it is characterized in that: described cyclone dust collector (8) comprises support (8.1), primary cyclone (8.2) and secondary cyclone (8.3), described primary cyclone (8.2), secondary cyclone (8.3) supports by support (8.1), the blast pipe (8.4) of primary cyclone (8.2) is for passing into pending combustion gas, the exhaust duct (8.5) of primary cyclone (8.2) is connected with the blast pipe (8.4) of secondary cyclone (8.3), the exhaust duct (8.5) of secondary cyclone (8.3) is transported to the next stage treatment facility for the combustion gas by after processing.

18. biomass fuel gas generating system as claimed in claim 17, it is characterized in that: described primary cyclone (8.2) is identical with the structure of secondary cyclone (8.3), they include blast pipe (8.4), exhaust duct (8.5) and cylindrical shell (8.8), cylindrical shell (8.8) upper semisection is cylindrical, lower semisection is conical, blast pipe (8.4) is arranged on cylindrical shell (8.8), the direction that air-flow enters from blast pipe (8.4) is for tangential, exhaust duct (8.5) coaxially is arranged in cylindrical shell (8.8), exhaust duct (8.5) bottom is shrunk to taper shape downwards gradually, the tube wall of exhaust duct (8.5) is provided with multiple tracks longer tuyere (8.9) along its length, described longer tuyere (8.9) is single deflection grille, described multiple tracks longer tuyere (8.9) is along circumferentially uniform on the tube wall of exhaust duct (8.5), and exhaust duct (8.5) lower end tube wall is provided with a plurality of along its circumferential uniform wind hole (8.10), be provided with a sleeve body (8.7) that shape is suitable with it outside described cylindrical shell (8.8), between sleeve body (8.7) inwall and cylindrical shell (8.8) outer wall, form water jacket, the water jacket bottom is provided with water-in, and water jacket top is provided with water outlet, described cylindrical shell (8.8) lower end also is connected with a conic tube (8.11), and the bore of conic tube (8.11) upper end is greater than the bore of cylindrical shell (8.8) lower end.

19. biomass fuel gas generating system as claimed in claim 1, it is characterized in that: described one-level tubular type inter cooler (9) comprises bracing frame (9.1), water cooling box (9.6), air intake casing (9.15), the housing (9.10) of giving vent to anger, water inflowing box (9.6b), water outlet box (9.6c), serpentine tube (9.6d), water inlet pipe (9.3) and rising pipe (9.13), described water cooling box (9.6) supports by bracing frame (9.1), water cooling box (9.6) is at least one, the stacked placement of at least one water cooling box (9.6), between the casing (9.6a) of all water cooling boxes (9.6), be tightly connected, casing (9.6a) bottom of bottom water cooling box (9.6) is equipped with the air intake casing (9.15) be communicated with inlet pipe (9.14), topmost casing (9.6a) top of water cooling box (9.6) is equipped with the housing of giving vent to anger (9.10), the both sides of described casing (9.6a) front surface seal respectively installs water inflowing box (9.6b) and water outlet box (9.6c), be provided with the many serpentine tubes in the different heights staggered arrangement (9.6d) in casing (9.6a), the two ends of many serpentine tubes (9.6d) are communicated with described water inflowing box (9.6b) and water outlet box (9.6c) respectively, and water coolant can circulate from bottom to top in serpentine tube (9.6d), described water inlet pipe (9.3) is arranged in bracing frame (9.1) and water cooling box (9.6) one sides, water inflowing box (9.6b) bottom on each water cooling box (9.6) is communicated with water inlet pipe (9.3) by water inlet pipe (9.4), and a valve (9.5) all is installed on each water inlet pipe (9.4), rising pipe (9.13) is arranged in bracing frame (9.1) and water cooling box (9.6) opposite side, an exit branch (9.11) is all installed on water outlet box (9.6c) top on each water cooling box (9.6), the water outlet below of each exit branch (9.11) is provided with a funnel (9.12), and this funnel (9.12) is communicated with described rising pipe (9.13), the structure of described secondary tubular type inter cooler (11) is identical with one-level tubular type inter cooler (9).

20. biomass fuel gas generating system as claimed in claim 19 is characterized in that: the described housing of giving vent to anger (9.10) is provided with venting (9.9), and relief pipe (9.7) is installed on venting (9.9), and decompression hand valve (9.8) is installed on relief pipe; The bottom of described air intake casing (9.15) is connected with aggregate pipe (9.16), and aggregate pipe (9.16) lower end connects collection bucket (9.17), and the first valve (9.18) open in usual is installed on aggregate pipe (9.16); Described collection bucket (9.17) bottom is equipped with drainage conduit (9.19), and second valve (9.20) of normally closed type is installed on drainage conduit (9.19); Described water cooling box (9.6) has six, and water cooling box (9.6) is square.

21. biomass fuel gas generating system as claimed in claim 1, it is characterized in that: described combustion gas filtering and purifying (12) comprises air inlet pants pipe (12.1), valve (12.2), the first gas filter (12.3), the second gas filter (12.4) and the pants pipe (12.5) of giving vent to anger, the supervisor of described air inlet pants pipe (12.1) is for air inlet, and the supervisor of the pants pipe (12.5) of giving vent to anger is for giving vent to anger; An arm of air inlet pants pipe (12.1) is connected with the inlet mouth of the first gas filter (12.3) through a valve (12.2), and the air outlet of the first gas filter (12.3) is connected with an arm of the pants pipe (12.5) of giving vent to anger through another valve (12.2); Another arm of air inlet pants pipe (12.1) is connected with the inlet mouth of the second gas filter (12.4) through a valve (12.2), and the air outlet of the second gas filter (12.4) is connected with another arm of the pants pipe (12.5) of giving vent to anger through another valve (12.2).

22. biomass fuel gas generating system as claimed in claim 21 is characterized in that: described valve (12.2) adopts Hand-operated butterfly valve; The supervisor of described air inlet pants pipe (12.1), the pants pipe (12.5) of giving vent to anger is identical with the caliber of arm.

23. biomass fuel gas generating system as claimed in claim 1, it is characterized in that: described one-level moisture separator (13) comprises cyclonic separator (13.1) and water tank (13.4), described cyclonic separator (13.1) supports by support (13.2), the blast pipe (13.1a) of cyclonic separator (13.1) is for passing into the combustion gas that contains moisture, the exhaust duct (13.1b) of cyclonic separator (13.1) is transported to the next stage treatment facility for the combustion gas that will separate after moisture, the liquid outlet of cyclonic separator (13.1) bottom is connected with pipeline (13.3), this pipeline (13.3) lower end is stretched in water tank (13.4), described water tank (13.4) top is provided with upflow tube (13.5), for the liquid level by water tank (13.4), maintains certain altitude, the structure of described second level moisture separator (14) is identical with one-level moisture separator (13).

24. biomass fuel gas generating system as claimed in claim 23, it is characterized in that: described cyclonic separator (13.1) comprises blast pipe (13.1a), exhaust duct (13.1b) and cylindrical shell (13.1c), cylindrical shell (13.1c) upper semisection is cylindrical, lower semisection is conical, blast pipe (13.1a) is arranged on cylindrical shell (13.1c), the direction that air-flow enters from blast pipe (13.1a) is for tangential, exhaust duct (13.1b) coaxially is arranged in cylindrical shell (13.1c), exhaust duct (13.1b) bottom is shrunk to taper shape downwards gradually, the tube wall of exhaust duct (13.1b) is provided with multiple tracks longer tuyere (13.1e) along its length, described multiple tracks longer tuyere (13.1e) edge on the tube wall of exhaust duct (13.1b) is circumferentially uniform, exhaust duct (13.1b) lower end tube wall is provided with a plurality of along its circumferential uniform wind hole (13.1f), described longer tuyere (13.1e) is single deflection grille.

25. biomass fuel gas generating system as claimed in claim 1, it is characterized in that: described gas transmission gas storage piping system comprises connecting tube, roots blower (15), smoke evacuation purification of combustion device (16) and coal gas surge tank (17), the outlet of described second level moisture separator (14) is by connecting tube and smoke evacuation purification of combustion device (16), coal gas surge tank (17) connects respectively, described roots blower (15) is arranged on connecting tube, for carrying capacity is provided, described smoke evacuation purification of combustion device (16) is for removing the detrimental impurity composition of Exhaust Gas, described coal gas surge tank (17) is for temporary biological fuel gas.

26. biomass fuel gas generating system as claimed in claim 25 is characterized in that: described smoke evacuation purification of combustion device (16) comprises blower fan (16.1), air inlet pipeline (16.2), burning purification pipe, supporting tube (16.3), stovepipe (16.14), lower flat flame burner (16.17), upper flat flame burner (16.10), lower high temperature steel dividing plate (16.7) and upper high temperature steel dividing plate (16.9), blower fan (16.1) connects air inlet pipeline (16.2), and the burning purification pipe supports by supporting tube (16.3), and burning purification pipe lower end import is connected with foreign gas access tube (16.19), for passing into pending foreign gas, the outlet of burning purification pipe upper end connects stovepipe (16.14), is provided with stack cover (16.16) directly over stovepipe (16.14), and stack cover (16.16) is fixed on stovepipe (16.14) by support bar (16.15), described burning purification pipe inwall is provided with refractory masses (16.8), lower flat flame burner (16.17) is arranged on a side of burning purification pipe bottom, upper flat flame burner (16.10) is arranged on the opposite side on burning purification pipe top, lower flat flame burner (16.17), upper flat flame burner (16.10) is provided with burner block (16.11) on every side, lower flat flame burner (16.17), the air intlet of upper flat flame burner (16.10) is communicated with air inlet pipeline (16.2) respectively, lower flat flame burner (16.17), the fuel gas inlet of upper flat flame burner (16.10) is communicated with gas line (16.19) respectively, lower high temperature steel dividing plate (16.7) is arranged on the bottom in the burning purification pipe, is positioned under lower flat flame burner (16.17), and the upper side near lower flat flame burner (16.17) of lower high temperature steel dividing plate (16.7) is provided with ventilating pit, upper high temperature steel dividing plate (16.9) is arranged on the middle part in the burning purification pipe, be positioned on lower flat flame burner (16.17), under upper flat flame burner (16.10), the upper side near upper flat flame burner (16.10) of upper high temperature steel dividing plate (16.9) is provided with ventilating pit.

27. biomass fuel gas generating system as claimed in claim 26, it is characterized in that: described burning purification pipe comprises the first pipe fitting (16.12) and the second pipe fitting (16.6) connected by flange, the upper end of the first pipe fitting (16.12) is conical, its top is provided with pipe connecting (16.13), and pipe connecting (16.13) upper end is connected with described stovepipe (16.14); The second pipe fitting (16.6) supports by supporting tube (16.3), and the lower end of the second pipe fitting (16.6) is conical, and its bottom is provided with bridge piece (16.4), and bridge piece (16.4) is connected with foreign gas access tube (16.19); Described burning purification pipe bottom is provided with the nozzles with injector (16.5) that spout makes progress, and nozzles with injector (16.5) is near lower flat flame burner (16.17) one sides on the burning purification pipe, and nozzles with injector (16.5) is communicated with described air inlet pipeline (16.2); Having clamped one deck string diameter between described burning purification pipe lower end import and foreign gas access tube (16.19) is 0.6mm, and the order number is 10 purpose Stainless Steel Wire screen cloths, in case the non-return fire; The composition of described refractory masses (16.8) is aluminosilicate property refractory fibre, polycrystalline alumina fiber, mullite fiber or Zirconium oxide fibre.