CN216106796U - Device for preparing fuel gas by gasifying biomass horizontal gasification furnace - Google Patents

Abstract

A device for preparing fuel gas by gasifying a biomass horizontal gasification furnace adopts a horizontal furnace body, so that the height of the furnace body is reduced; the temperature of the produced fuel gas is detected in real time by a temperature instrument, the fuel gas is fed when the detected fuel gas temperature is higher than the control temperature, and the feeding is stopped when the detected fuel gas temperature is lower than the control temperature, so that the height of a material layer in the gasification furnace is adjusted, the temperature of the discharged fuel gas is adjusted, the content of liquid tar in the fuel gas is greatly reduced, and the delivery and the use of the fuel gas are facilitated; meanwhile, the sealing performance of the horizontal furnace body is realized through the primary feed valve, the secondary feed valve, the material distribution device, the nitrogen sealing structure and the like, the air leakage of the horizontal furnace body is reduced, and the heat value and the safety of fuel gas are improved; the cooling heat generated by the horizontal furnace body and the like is fully recovered through the water cooling jacket, the air cooling jacket and the like in the horizontal furnace body, so that the heat dissipation loss is reduced; through the two-stage carbon pushing device, the scraper conveyor and the slag cooler, ash and coke are not contacted with water in the whole process, the ash and the coke are ensured to be dry carbon, and the economic utilization value of the carbon is improved.

Description

Device for preparing fuel gas by gasifying biomass horizontal gasification furnace

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the field of biomass gasification equipment, relates to a device, and particularly relates to a device for preparing fuel gas by gasifying a biomass horizontal gasification furnace.

[ background of the utility model ]

The biomass gasification furnace type includes: fixed bed, fluidized bed, entrained flow bed. The fixed bed has high gasification efficiency, low requirements on the water content and the size of the raw materials, simple structure, low investment cost and convenient operation, maintenance and repair, and is particularly suitable for small-scale biomass gasification. The fixed bed is subdivided into: the air conditioner mainly comprises an updraft type air conditioner, a downdraft type air conditioner, a cross draft type air conditioner and a two-stage type air conditioner (two-stage air inlet), wherein the updraft type air conditioner and the downdraft type air conditioner are mainly used. The updraft type fixed bed has the advantages over the downdraft type fixed bed: the requirement on the water content of the raw materials is low, the ash in the fuel gas is less, the temperature of the fuel gas is low, and the heat efficiency is high; the disadvantages are as follows: the tar content of the updraft type generated gas is far higher than that of the downdraft type generated gas, 10-20% of the updraft type gas is tar, and the downdraft type generated gas is only about 1g/m³。

However, the conventional updraft fixed bed has the following problems: (1) the height is higher, the temperature of the discharged gas is between 80 and 300 ℃, tar mostly exists in a liquid state, and the tar content is higher, thus influencing the gas delivery and use. (2) The feeding system carries a certain amount of air to enter the horizontal furnace body, the sealing effect of the feeding system is poor, and the quality of fuel gas is reduced. (3) The carbon discharging system mostly adopts a water sealing structure, and the discharged carbon is wet carbon, so that the economic utilization value of the carbon is influenced.

[ Utility model ] content

Aiming at the problems, the utility model aims to provide a device for preparing fuel gas by gasifying a biomass horizontal gasification furnace, which adopts a horizontal furnace body to reduce the height of equipment, controls feeding by discharging fuel gas temperature in actual operation, feeds when the fuel gas temperature is higher than the control temperature, stops feeding when the fuel gas temperature is lower than the control temperature, and adjusts the height of a material layer in the gasification furnace, thereby adjusting the discharging fuel gas temperature and reducing the content of liquid tar in the fuel gas; various sealing structures are adopted, so that air brought into the gasification furnace in a feeding link is reduced, the sealing performance of the gasification furnace is improved, and the quality of fuel gas is improved; the purpose of dry carbon discharge is realized through the two-stage carbon pushing device, the scraper conveyor and the slag cooler, and the economic utilization value of the carbon is improved.

The utility model provides a device for preparing fuel gas by gasifying a biomass horizontal gasification furnace, which comprises:

the primary material distribution bin is a double-helix material distribution bin and is used for storing the biomass fuel, so that the crushed and pressed biomass fuel can be conveniently conveyed to a discharge port;

locate one-level branch feed bin one side, be used for producing the horizontal furnace body of gas after biomass fuel gasification, its outer wall from interior to exterior includes in proper order: the horizontal furnace body is provided with a through groove at the top, a grate for containing ash and coke is arranged at the bottom, one end of the grate is provided with a two-stage carbon pushing device for pushing the ash and the coke out, the other end of the grate is provided with a scraper, a slag cooler is arranged at a feed opening of the scraper, a gas conveying pipeline is arranged at the top of the horizontal furnace body, a temperature instrument is arranged on the gas conveying pipeline, a detected signal can be transmitted to a feeding system in a controller through the temperature instrument, feeding is stopped when the temperature is lower than a set value, and feeding is started when the temperature is higher than the set value, so that the height of biomass fuel in the horizontal furnace body can be adjusted, the adjustment and control of the gas temperature are realized, and the content of liquid tar in the gas is further reduced;

locate the two-stage material distribution bin of horizontal furnace body top, its top is equipped with one-level delivery valve, below is equipped with spiral feeder, and is equipped with blanking pipe, distributing device between this two-stage material distribution bin discharge gate and the horizontal furnace body in proper order, and this distributing device includes: the two spiral feeders of unipolar, locate the pneumatic seal hinge of two spiral feeders of unipolar below, the feed inlet of two spiral feeders of unipolar is located horizontal furnace body positive intermediate position, and helical blade on the screw axis in the two spiral feeders of unipolar uses the centre as the starting point, respectively to both sides antiport, also namely the helical blade of both sides is to opposite soon, so can be at biomass fuel along the blanking pipe get into behind the two spiral feeders of unipolar, under the effect of screw axis, by middle respectively to the both sides uniform transport of horizontal furnace body, it is more even to ensure to get into the biomass fuel in the horizontal furnace body, the two spiral feeders of unipolar that choose for use simultaneously can reduce the air admission horizontal furnace body in the biomass fuel, the pneumatic seal hinge includes: the two hinges are opened and closed under the action of the air cylinder, so that the adverse effect on the gas quality caused by the air entering the horizontal furnace body is further reduced;

the belt conveyor is arranged between the feed inlet of the second-stage distribution bin and the discharge outlet of the first-stage distribution bin and is used for feeding the biomass fuel in the first-stage distribution bin into the horizontal furnace body through the second-stage distribution bin;

and the controller is used for controlling the first-stage material distribution bin, the horizontal furnace body, the second-stage material distribution bin and the belt conveyor.

Particularly, a nitrogen sealing structure is arranged in the secondary material distribution bin and is positioned below the primary material feeding valve; the nitrogen gas seal structure includes: the air outlet pipes are respectively arranged on two sides of the secondary material distribution bin from top to bottom, and the air blowing pipes are used for communicating the air outlet pipes with the nitrogen making device; so design, at the in-process of making the gas, through discharging into nitrogen gas, can play the effect of isolated air to further reduce the air that gets into in the horizontal furnace body, improved the gas quality.

Particularly, a secondary feeding valve is arranged in the blanking pipe, and can further improve the air tightness of the horizontal furnace body and reduce the air quantity entering the horizontal furnace body, so that the quality of fuel gas is further improved.

Particularly, an air cooling jacket is arranged between the heat insulation layer and the heat insulation layer, air is forcibly ventilated in the air cooling jacket, external normal-temperature air is used as combustion-supporting air to be conveyed to the gas steam boiler, a water cooling jacket is arranged at the position of the horizontal furnace body, which is in contact with ash and coke, and is communicated with an external water source, and cold water is introduced into the water cooling jacket to cool the ash and coke and the horizontal furnace body, so that heat recovery is realized.

Particularly, the length of the single-shaft double-helix feeder is the same as that of the pneumatic sealing hinge and that of the horizontal furnace body, so that the biomass fuel can be uniformly distributed in the horizontal furnace body, and the processing efficiency is improved; simultaneously because the temperature at horizontal furnace body top is higher, between 350-.

Particularly, in the production process, ash and coke generated after the biomass fuel is oxidized, pyrolyzed and gasified fall on a grate, and the temperature of the ash and the coke is high, so that the ash and the coke can be quickly cooled, the grate is a water-cooling grate and is communicated with an external water source, and the temperature of the ash and the coke is reduced after heat exchange through the grate; simultaneously in order to prevent that lime-ash and coke on the grate are too much, and influence the discharge of horizontal furnace internal lime-ash and coke, be equipped with the inductor that is used for responding to lime-ash and coke thickness on this grate, the thickness of lime-ash and coke can be responded to in real time to the inductor, after the thickness that senses reached the setting value, the controller control two-stage pushes away charcoal device and begins work, push out lime-ash and coke on the grate and get into the trigger of scraping, later get into the cold sediment machine under the effect of scraping the trigger, whole journey lime-ash and coke are not contacted with water, realize going out the purpose of dry charcoal, the economic utilization value of coke has been improved.

Particularly, the end parts of the two hinges are V-shaped, and the tips of the two hinges forming the V shape face the horizontal furnace body; by the design, the biomass fuel entering the upper part of the hinge can quickly fall into the horizontal furnace body under the self gravity, and the air can be further reduced.

Particularly, because gaps are formed among the fire grates, part of ash and coke can fall to the lower part along the gaps of the fire grates, and therefore, in order to improve the utilization rate of the ash and the coke, the two-stage charcoal pushing device comprises an upper charcoal pushing device and a lower charcoal pushing device, wherein the upper charcoal pushing device extends out of the upper part of the fire grates, and the lower charcoal pushing device is arranged below the fire grates; so design, the clinker and coke propelling movement to scraping the trigger above the grate can be with the grate to the charcoal device that pushes up, and the clinker and coke propelling movement that the charcoal device can drop in the grate clearance is scraped the trigger to the pipe down to make the clinker and coke that biomass fuel produced can be retrieved completely and treat the utilization.

Particularly, the staggered switching of the primary feeding valve and the secondary feeding valve is realized through the controller, so that when the primary feeding valve is opened, the secondary feeding valve is closed, and when the primary feeding valve is closed, the secondary feeding valve is opened, so that the air quantity entering the horizontal furnace body is reduced, the sealing effect of the horizontal furnace body is improved, and in an emergency situation, the feeding of the horizontal furnace body can be cut off by closing the primary feeding valve and the secondary feeding valve, and the safety of the device is ensured; meanwhile, the second-stage feeding valve and the pneumatic sealing hinge are switched on and off in a staggered mode through the controller, so that when the second-stage feeding valve is opened, the pneumatic sealing hinge is closed, and when the second-stage feeding valve is closed, the pneumatic sealing hinge is opened, the air quantity entering the horizontal furnace body is further reduced, and the sealing effect of the horizontal furnace body is improved.

Particularly, the cyclone dust collector is arranged on the fuel gas conveying pipeline and can be used for removing most of particles in fuel gas, so that the fuel gas entering the fuel gas steam boiler is enabled to be purer, the influence of the particles on the fuel gas steam boiler is reduced, the service life of the fuel gas steam boiler is prolonged, the heat efficiency of the fuel gas steam boiler is improved, and the unplanned shutdown phenomenon of the fuel gas steam boiler is reduced.

Compared with the prior art, the device for preparing the fuel gas by gasifying the biomass horizontal gasification furnace, provided by the utility model, has the advantages that the height of the furnace body is reduced by adopting the horizontal furnace body, the temperature of the output fuel gas is detected in real time by the temperature instrument, the feeding is stopped when the detected temperature of the fuel gas is higher than the control temperature and is stopped when the detected temperature of the fuel gas is lower than the control temperature, the height of a material layer in the gasification furnace is adjusted, so that the temperature of the discharged fuel gas is adjusted, the content of liquid tar in the fuel gas is greatly reduced, and the delivery and the use of the fuel gas are facilitated; meanwhile, the sealing performance of the horizontal furnace body is realized through the primary feed valve, the secondary feed valve, the material distribution device, the nitrogen sealing structure and the like, the air leakage of the horizontal furnace body is reduced, and the heat value and the safety of fuel gas are improved; the cooling heat generated by the horizontal furnace body and the like is fully recovered through the water cooling jacket, the air cooling jacket and the like in the horizontal furnace body, so that the heat dissipation loss is reduced; through the two-stage carbon pushing device, the scraper conveyor and the slag cooler, ash and coke are not contacted with water in the whole process, the ash and the coke are ensured to be dry carbon, and the economic utilization value of the carbon is improved. In conclusion, the device for preparing the fuel gas by gasifying the biomass gasification furnace has the advantages of low height, convenience in maintenance, good sealing property, high quality of the produced fuel gas, small heat loss, capability of producing dry carbon and the like.

[ description of the drawings ]

FIG. 1 is a schematic structural diagram of a device for preparing fuel gas by gasifying a biomass horizontal gasification furnace according to the utility model;

FIG. 2 is a side view of a horizontal furnace body in the device for preparing fuel gas by gasifying a biomass horizontal gasification furnace according to the utility model;

FIG. 3 is a side view of a nitrogen sealing knot in the device for preparing fuel gas by gasifying the horizontal biomass gasifier of the utility model;

FIG. 4 is a schematic view of the structural connection of a scraper and a slag cooler in the device for preparing fuel gas by gasifying the horizontal biomass gasifier.

In the attached drawing, a first-grade material dividing bin 1, a horizontal furnace body 2, a fire grate 3, a two-grade carbon pushing device 4, a scraper 5, a slag cooler 6, a fuel gas conveying pipeline 7, a temperature meter 8, a second-grade material dividing bin 9, a first-grade feed valve 10, a spiral feeder 11, a material distribution device 12, a single-shaft double-spiral feeder 13, a pneumatic sealing hinge 14, a belt conveyor 15, an air outlet pipe 16, an air blowing pipe 17, a second-grade feed valve 18, an air cooling jacket 19, a water cooling jacket 20, a cyclone dust collector 21 and a blanking pipe 22 are arranged.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 4, the present invention provides a device for preparing fuel gas by gasifying biomass in a horizontal gasifier, comprising: feeding system, horizontal furnace body, cooling and heat dissipation recovery system, play charcoal system, gas are carried and clean system, controller, wherein, feeding system includes: first grade feed bin 1, second grade feed bin 9, distributing device 12, band conveyer 15, cooling system includes: air cooling presss from both sides 19, the water-cooling presss from both sides the cover 20, goes out the charcoal system and includes: two-stage pushes away charcoal device 4, scrapes trigger 5, cold sediment machine 5, and the gas is carried and the clean system includes: a gas conveying pipeline 7 and a cyclone dust collector 21.

In the actual working process, crushed or crushed briquetted biomass fuel is conveyed into a first-stage separation bin 1 through a conveying mechanism such as a forklift, the first-stage separation bin 1 is a double-spiral separation bin and can quickly and uniformly convey the biomass fuel to a belt conveyor 15, the belt conveyor 15 conveys the biomass fuel to the position above a second-stage separation bin 9, at the moment, a first-stage feeding valve 10 is opened, the biomass fuel enters the second-stage separation bin 9 and is conveyed to a blanking pipe 22 through a spiral feeder 11, and the spiral feeder 11 adopts the double-spiral feeder and can extrude air in the biomass fuel, so that the air inlet amount is reduced; then enters the distributing device 12 through the blanking pipe 22, at the moment, the first-stage feeding valve 10 is closed, and the second-stage feeding valve 18 is opened; after biomass fuel passes through unipolar double helix feeder 13, with biomass fuel evenly distributed in pneumatic seal hinge 14 top, secondary feed valve 18 closes this moment, and pneumatic seal hinge 14 opens, with biomass fuel even drop to horizontal furnace body 2 in, 2 outer walls of horizontal furnace body (be the wall body) from interior to exterior include in proper order: the heat-insulating layer and the heat-insulating layer are hollow, an air cooling jacket 19 is arranged between the metal heat-insulating layer and the heat-insulating layer, forced ventilation is carried out in the air cooling jacket 19, and normal-temperature air is fed into the gas-steam boiler as combustion-supporting air after passing through the air cooling jacket 19.

In order to fully utilize the sensible heat of ash and coke after the biomass fuel is combusted and reduce the discharge temperature of the ash and the coke, a refractory brick and a heat insulation layer are not arranged in the horizontal furnace body, a hollow water-cooling jacket 20 is arranged at the position where the ash and the bottom of the horizontal furnace body 2 are contacted, cold water is introduced into the water-cooling jacket 20, reverse osmosis produced water is pressurized by a water supply pump, passes through the water-cooling jacket 16, absorbs certain heat dissipation, returns to a softening water tank, and then enters a gas steam boiler from the softening water tank. Through the measures, the heat loss of the gasification furnace is reduced, and the sensible heat of the ash layer is recovered, so that the heat efficiency of the gasification furnace is improved.

The finally generated biomass fuel gas is output through a fuel gas conveying pipeline 7, a cyclone dust collector 21 is arranged on the fuel gas conveying pipeline 7, and the biomass fuel gas is conveyed to a fuel gas steam boiler after being dedusted by the cyclone dust collector 21. Meanwhile, a temperature instrument 8 is installed on the fuel gas output pipeline 7, the temperature instrument 8 feeds a detection signal back to the feeding system, feeding is stopped when the temperature is lower than a set value, and feeding is started when the temperature is higher than the set value. The gasified coke and ash fall on the fire grate 3, when the coke and ash reach a certain thickness, the coke and ash are pushed out to the scraper conveyor 5 through the two-stage carbon pushing device 4, then are sent to the slag cooler 6 through the scraper conveyor 5, and the coke and ash cooled by the slag cooler 6 are discharged for utilization.

The biomass fuel gas is divided into: low temperature fuel gas (70-130 deg.C), medium temperature fuel gas (300-800 deg.C), and high temperature fuel gas (not less than 800 deg.C). The biomass produces tar during gasification, which is a complex mixture of condensable hydrocarbons. And tar begins to condense when the temperature is lower than 300 ℃, so that the biomass gasified gas conveying pipeline and equipment are polluted and blocked. When the temperature of the fuel gas is higher than 300 ℃, tar exists in a gaseous state. Therefore, the utility model generates medium-temperature fuel gas by adjusting and controlling the height of the biomass fuel in the gasification furnace, namely the horizontal furnace body 2, the fuel gas output pipeline 7 is provided with the temperature meters 8, the number of the temperature meters 8 is preferably 3, and the detection signals are fed back to a feeding control system in the controller by adopting '3 to 2', thereby ensuring the accuracy of the temperature detection signals. The temperature of the fuel gas at the outlet of the gasification furnace is set between 350 ℃ and 500 ℃ to ensure that the tar in the fuel gas is in a gaseous state.

In combination with the above description, the gas temperature regulation principle of the present invention: when the temperature is lower than the set temperature, the material layer in the horizontal furnace body 2 is higher, the biomass fuel gas generated by pyrolysis reduction exchanges heat with the raw material, the sensible heat loss is more, the gas temperature is reduced to a larger extent, the temperature instrument 8 feeds a low temperature signal back to the feeding system, the feeding system stops conveying the biomass fuel to the horizontal furnace body 2, the height of the biomass fuel layer in the horizontal furnace body 2 is reduced, the heat exchange quantity of the gas and the biomass fuel layer is reduced, and the gas temperature is increased. When the gas temperature is higher than the set value, the gas production rate of the gasification furnace is combined, the rear-end gas application system is provided with a biomass gas flowmeter, the biomass fuel layer height in the gasification furnace is low, the temperature instrument feeds back a temperature high signal to the feeding control system, the feeding control system controls the feeding system to convey biomass fuel to the horizontal furnace body 2, and finally the regulation and control of the output gas temperature are realized.

In the utility model, the pressure in the horizontal furnace body 2 maintains negative pressure, and because the biomass fuel is relatively loose, a certain amount of air is inevitably carried by the feeding system to enter the gasification furnace, which causes certain adverse effect on the quality of the gas. Therefore, the silo of the primary-grade silo is designed to be funnel-shaped, so that the biomass fuel can fall freely by gravity, and air entrainment can be reduced. Meanwhile, a single-shaft double-helix feeder 13 is adopted, so that air entrainment can be reduced, and biomass fuel can uniformly enter a blanking pipe 22.

Meanwhile, a nitrogen sealing structure is arranged above the secondary material distribution bin 9, the nitrogen is inert gas and can be used for isolating air, the content of the nitrogen in the air is about 79%, and the nitrogen can be conveniently and economically prepared through a pressure swing adsorption device, so that the other end of the air blowing pipe 17 can be connected with the pressure swing adsorption device to quickly generate the nitrogen. Then, under a certain temperature and pressure, nitrogen can be uniformly sent into the secondary fraction bin 9 through a nitrogen conveying pipeline, namely the gas storage tank 16 and a nozzle arranged above the gas storage tank, because the pressure of the nitrogen is slightly higher than the atmospheric pressure and the temperature is slightly higher than the room temperature. In the utility model, in order to fully expel the air in the biomass fuel, the flow rate of the nitrogen is 2-3 times of the total pore volume of the biomass fuel. The content of nitrogen in the finally produced fuel gas is slightly increased by introducing the nitrogen, but the content of oxygen in the fuel gas can be reduced, and the oxygen content is an important index of the fuel gas quality, wherein the 'NY/T3337-2018 biomass gasification centralized gas supply station construction standard' requires that the content of oxygen in the fuel gas produced by the biomass gasification furnace is lower than 1%, so that the quality of the fuel gas produced by the device provided by the utility model is higher, and completely meets the 'NY/T3337-2018 biomass gasification centralized gas supply station construction standard'. Meanwhile, the introduced nitrogen can be used as the purging gas and the accident protection gas of the horizontal furnace body 2 and the fuel gas conveying pipeline 7, so that the safety of the device is improved.

The staggered switches of the first-stage feeding valve 10 and the second-stage feeding valve 18, the staggered switches of the second-stage feeding valve 18 and the starting sealing hinge 14 are opened and closed one by one, so that the air tightness of the horizontal furnace body 2 can be improved, the air quantity entering the horizontal furnace body 2 can be reduced, the first-stage feeding valve 10 and the second-stage feeding valve 18 can be closed in emergency, the feeding of the horizontal furnace body 2 is cut off, and the safety of the device is ensured.

And the pneumatic sealing hinge 14 in the distributing device 12 is welded on a bearing, and the bearing rotates under the action of the cylinder, so that the bearing drives the sealing hinge 14 to open and close in the rotating process. The pneumatic sealing hinge 14 arranged at the bottom of the distributing device 12 is the same as the single-shaft double-helix feeder 13 in length, so that biomass raw materials can uniformly fall onto the pneumatic sealing hinge 14, the sealing hinge 14 is distributed along the length of the horizontal furnace body 2, the biomass fuel can uniformly fall into the horizontal furnace body 2, uniform combustion of the biomass fuel is realized, and the gas production rate is indirectly improved. Meanwhile, the material distribution device 12 is arranged at the top of the horizontal furnace body 2, so that the screw bearing in the single-shaft double-screw feeder 13 is designed into a hollow structure, and cooling water is introduced into the screw bearing to cool the material distribution device 12 and prolong the service life of equipment in order to avoid the influence of heat generated by the horizontal furnace body 2 on the material distribution device 12 and reduce the service life of the equipment.

Biomass fuel is through the burning of horizontal furnace body 2, the lime-ash and the coke that produce after the pyrolysis gasification fall on grate 3, because logical cold water in the grate 3, the temperature of lime-ash and coke reduces after the heat transfer, after the thickness that detects lime-ash and coke when the inductor reaches the setting value, the controller starts the push-up charcoal device that two-stage pushed away charcoal device 4, push away the furnace body with lime-ash and coke on the grate 3, get into and scrape trigger 5, deliver to cold sediment machine 6 by scraping trigger 5 again, collect through the discharge gate of cold sediment machine 6, thereby be convenient for carry out subsequent utilization. Simultaneously because of partial lime-ash and coke can fall through 3 whereabouts of grate, when inductor senses the lime-ash and the coke of whereabouts and reaches certain thickness, start the lower charcoal device of pushing down, push away lime-ash and coke and scrape trigger 5, send to cold sediment machine 6 by scraping trigger 5 again, collect through the discharge gate of cold sediment machine 6 to be convenient for carry out subsequent utilization. The ash residue and the coke pushed out by the furnace bottom structure and the two-stage carbon pushing device in the form do not contain moisture, so that the purpose of discharging dry carbon from the gasification furnace, namely the horizontal furnace body 2 is realized, and the economic utilization value of the coke is improved.

The gas conveying pipeline 7 is provided with a cyclone dust collector 21 for removing most particles in the biomass gas, purifying the gas, reducing the influence of dust deposition on the biomass gas steam boiler, prolonging the service life of the gas steam boiler, improving the heat efficiency of the gas steam boiler and reducing the unplanned shutdown phenomenon of the gas steam boiler.

In conclusion, the utility model improves the outlet gas temperature of the horizontal furnace body 2 by adjusting the height of the biomass fuel in the horizontal furnace body 2, so that the outlet gas temperature is always kept between 350 and 500 ℃, and the tar in the gas is ensured to be gaseous, thereby reducing the content of the liquid tar in the gas and facilitating the subsequent application; meanwhile, various sealing design measures are adopted, so that the sealing performance of the feeding system is improved, the air leakage of the gasification furnace, namely the horizontal furnace body 2, is reduced, and the heat value and the safety of fuel gas are improved; the arrangement of the air cooling jacket and the water cooling jacket improves the heat efficiency of the gasification furnace; the purpose of dry carbon discharge is realized through the water-cooled grate 3, the two-stage carbon pushing device 4, the scraper conveyor 5 and the slag cooler 6, and the economic utilization value of coke is favorably improved.

Claims (10)

1. The utility model provides a device of gas is prepared in gasification of horizontal gasifier of living beings which characterized in that includes:

a primary silo (1) for storing biomass fuel;

locate first grade feed bin (1) one side, be used for producing horizontal furnace body (2) of gas after biomass fuel gasification, its outer wall from interior to exterior includes in proper order: the horizontal furnace comprises a refractory brick layer, a heat insulation layer and a heat preservation layer, wherein the top of the horizontal furnace body (2) is provided with a through groove, the bottom of the horizontal furnace body is provided with a grate (3) for containing ash and coke, one end of the grate (3) is provided with a two-stage carbon pushing device (4) for pushing the ash and the coke out, the other end of the grate is provided with a scraper conveyor (5), a slag cooler (6) is arranged at a feed opening of the scraper conveyor (5), the top of the horizontal furnace body (2) is provided with a gas conveying pipeline (7), and the gas conveying pipeline (7) is provided with a temperature meter (8);

locate two grades of feed bins (9) of horizontal furnace body (2) top, its top is equipped with one-level delivery valve (10), is equipped with screw feeder (11) below, and is equipped with blanking pipe (22), distributing device (12) between this two grades of feed bins (9) discharge gate and horizontal furnace body (2) in proper order, and this distributing device (12) include: unipolar double helix feeder (13), locate pneumatic seal hinge (14) of unipolar double helix feeder (13) below, this pneumatic seal hinge (14) includes: the hinge comprises two hinges and an air cylinder for providing power for the hinges, wherein one ends of the two hinges are movably connected with two side edges of the through groove respectively, the other ends of the two hinges are contacted with each other, and the two hinges are opened and closed under the action of the air cylinder;

the belt conveyor (15) is arranged between the feeding hole of the second-stage material separating bin (9) and the discharging hole of the first-stage material separating bin (1) and is used for enabling the biomass fuel in the first-stage material separating bin (1) to enter the horizontal furnace body (2) through the second-stage material separating bin (9);

and the controller is used for controlling the first-stage material distribution bin (1), the horizontal furnace body (2), the second-stage material distribution bin (9) and the belt conveyor (15).

2. The device for preparing the fuel gas through the gasification of the horizontal biomass gasification furnace according to claim 1, wherein a nitrogen sealing structure is arranged in the secondary fraction bin (9) and is positioned below the primary feed valve (10); the nitrogen gas seal structure includes: the device comprises a plurality of air outlet pipes (16) used for providing nitrogen and air blowing pipes (17) connected with an external nitrogen making device, wherein the air outlet pipes (16) are respectively arranged on two sides of a two-stage material dividing bin (9) from top to bottom, and the air blowing pipes (17) are used for communicating the air outlet pipes (16) with the nitrogen making device.

3. The device for preparing the fuel gas by gasifying the biomass in the horizontal gasifier according to claim 1, wherein a secondary feed valve (18) is arranged in the blanking pipe (22).

4. The device for preparing the fuel gas by gasifying the biomass horizontal gasification furnace according to claim 1, wherein an air cooling jacket (19) is arranged between the heat insulation layer and the heat preservation layer, a water cooling jacket (20) is arranged at a position where the horizontal furnace body (2) is in contact with the ash and the coke, and the water cooling jacket (20) is communicated with an external water source.

5. The device for preparing the fuel gas through the gasification of the horizontal biomass gasification furnace according to claim 1, wherein the length of the single-shaft double-helix feeder (13) is the same as that of the pneumatic sealing hinge (14) and the horizontal furnace body (2), and a helical bearing in the single-shaft double-helix feeder (13) is of a hollow structure and is communicated with an external water source.

6. The device for preparing the fuel gas by gasifying the biomass horizontal gasifier according to claim 1, wherein the grate (3) is a water-cooled grate and is communicated with an external water source, and an inductor for inducing the thickness of ash and coke is arranged on the grate (3).

7. The device for preparing the fuel gas through the gasification of the horizontal biomass gasification furnace according to claim 1, wherein the ends of the two hinges are V-shaped, and the tips of the two hinges forming the V-shape face the horizontal furnace body (2).

8. The device for preparing the fuel gas through the gasification of the horizontal biomass gasification furnace according to claim 1, wherein the two-stage charcoal pushing device (4) comprises an upper charcoal pushing device and a lower charcoal pushing device, the upper charcoal pushing device extends out above the fire grate (3), and the lower charcoal pushing device is arranged below the fire grate (3).

9. The device for preparing the fuel gas through the gasification of the horizontal biomass gasification furnace according to claim 1, wherein the first-stage feed valve (10) and the second-stage feed valve (18) are switched on and off in a staggered manner through a controller, and the second-stage feed valve (18) and the pneumatic sealing hinge (14) are switched on and off in a staggered manner through the controller.

10. The device for preparing the fuel gas by gasifying the biomass horizontal gasification furnace according to claim 1, wherein a cyclone dust collector (21) is arranged on the fuel gas conveying pipeline (7).

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