CN104120081A - Low energy consumption operation biogas system suitable for cold regions - Google Patents
Low energy consumption operation biogas system suitable for cold regions Download PDFInfo
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Abstract
The invention belongs to the field of biomass energy utilization and environmental protection, and in particular relates to a low energy consumption operation biogas system suitable for cold regions. The low energy consumption operation biogas system includes an anaerobic fermentation tank, a fermentation tank heat-insulation system, a fermentation tank hydraulic mixing and fluid state material feeding system integrated system, a fermented material online solid-liquid separation system and a dry material under-liquid-level non-plugging spiral feeding system, the fermentation tank heat-insulation system is arranged on the anaerobic fermentation tank outer wall and the bottom of the tank body, the fermentation tank hydraulic mixing and fluid state material feeding system integrated system and the fermented material online solid-liquid separation system are connected with the anaerobic fermentation tank, the dry material under-liquid-level non-plugging spiral feeding system is arranged on the upper end of the anaerobic fermentation tank, and a dry material is conveyed under the liquid level of the anaerobic fermentation tank by the e dry material under-liquid-level non-plugging spiral feeding system; the low energy consumption operation biogas system can reduce tank body heat dissipation and tank body feeding energy consumption, improves the tank body discharging heat recovery, improves the engineering energy output, and overcomes the disadvantages that biogas in the cold regions is very high in energy consumption and is difficult to run.
Description
Technical field
The invention belongs to Biomass Energy Utilization and field of environment protection, specifically a kind of less energy-consumption operation bionethanation system that seasons oneself to cold regional.
Background technology
The northern area of China as northeast, North China and the Northwest be the main producing region of China's agricultural, husbandry is flourishing, produces every year a large amount of agricultural crop straws and feces of livestock and poultry, possesses the good raw material basis of Developing Biomass Energy Industry.But these areas, especially northeast and the Northwest, winter climate is very cold, traditional biogas engineering winter operation energy consumption very high (being mainly engineering operation hear rate), biogas engineering winter operation energy expenditure/Energy output is between 50%-100%, even part engineering energy consumption is higher than Energy output, and source benefit and the economic benefit of biogas engineering are very poor.The reason that causes this phenomenon is many-sided, be summed up and can be divided three classes: first, material feeding concentration is low, the input concentration of traditional slush pump, spiral pump etc. is between 4%-8%, and traditional fowl and animal excrement raw material often needs to add water and removes sand, therefore cause material fermentation concentration very low, and most of heat (being greater than 80%) demand in biogas engineering operational process comes from heating of fermentation materials (being mainly fermentation materials contained humidity), material concentration is very low means that to heat required heat energy very high; The second, tank body heat preserving mode falls behind, and current tank body insulation substantially be take tank wall and laid benzene plate and rock wool as main, and tank base is not done thermal insulation layer substantially, and heat insulation effect is poor, and winter operation heat dissipation capacity is large; The 3rd, it is serious that tank body goes out material unit heat waste, and biogas residue and biogas liquid is without exhaust heat recovering method; The 4th, raw material type is single, take feces of livestock and poultry as main, and production potential is little, and fermenting process production capacity is low.Above-mentioned reason has caused the existing biogas engineering of China very high at north cold area operation energy consumption jointly, and Energy output is very poor.
In order to improve China's existing biogas engineering net energy output, guarantee engineering is moved in the winter time also good Energy output and economic benefit, must be from improving material feeding concentration (dry feed or solid-state charging), the low heat dissipation mounting design of forced fermentation insulation of equipment and pipeline, carries out natural pond fluid residual heat recovery and reduces discharging process heat dissipation and improve the many aspects consumption reduction synergy such as engineering total energy output.
Summary of the invention
For the problems referred to above, the object of the present invention is to provide a kind of less energy-consumption operation bionethanation system that seasons oneself to cold regional.This system reduces tank body heat radiation and tank body charging energy consumption, improves tank body discharging heat recuperation, improve engineering Energy output, thereby it is very high to have overcome cold district biogas energy consumption, is difficult to the shortcoming of operation winter.
To achieve these goals, the present invention is by the following technical solutions:
A kind of less energy-consumption operation bionethanation system that seasons oneself to cold regional, comprise anaerobic fermentation tank, fermentor tank heat-insulation system, fermentor tank hydraulic mixing and fluid materials charging integral system, after fermentation, under the online solid-liquid separation system of material and dry material liquid level, nothing is stopped up spiral feed system, wherein fermentor tank heat-insulation system is arranged on the outer wall and tank base of anaerobic fermentation tank, described fermentor tank hydraulic mixing is all connected with anaerobic fermentation tank with the rear online solid-liquid separation system of material of fluid materials charging integral system and fermentation, under described dry material liquid level, without obstruction spiral feed system, be arranged at the upper end of anaerobic fermentation tank, dry material is by being delivered under the liquid level in anaerobic fermentation tank without stopping up spiral feed system under dry material liquid level, fluid materials is delivered in anaerobic fermentation tank by fermentor tank hydraulic mixing and fluid materials charging integral system, material after fermentation is consolidated by the online solid-liquid separation system of material after fermenting, liquid is separated.
Described fermentor tank heat-insulation system comprises that the windproof and heat insulation integrated system of tank skin, tank deck and/or tank base are incubated, waterproof integrated system, and the windproof and heat insulation integrated system of described tank skin, tank deck is on the tank skin of described anaerobic fermentation tank and the outside surface of tank deck, to be provided with successively from the inside to the outside preservative coat, thermal insulation layer I, thermal insulation layer II, steel rack, thermal insulation layer III and color steel protective layer; Described tank base insulation, waterproof integrated system are that the bottom of described anaerobic fermentation tank is provided with reinforced concrete foundation, steel wire net rack, extruded sheet thermal insulation layer and pea gravel concreten protective layer from bottom to up successively.
Described thermal insulation layer I is reflective heat-insulation paint layer, described thermal insulation layer II is rock-wool heat insulation plate or pure aluminium silicate warming plate, described steel rack is close to thermal insulation layer II outside surface, the outside surface of steel rack is provided with thorn-like projection, and described thermal insulation layer III is polyurethane foaming layer and is attached in the thorn-like projection of steel rack outside surface; Described steel wire net rack is close on the reinforced concrete foundation of anaerobically fermenting pot bottom, steel wire net rack is connected with the tank skin of anaerobic fermentation tank, described extruded sheet thermal insulation layer is multilayer and adopts fissure of displacement mode to lay, the seam crossing filling polyurethane foam material between extruded sheet and extruded sheet and between extruded sheet and tank skin.
Described fermentor tank hydraulic mixing and fluid materials charging integral system comprise hydraulic mixing pipe and Hydraulic Circulation pump, wherein hydraulic mixing pipe is arranged at anaerobic fermentation tank inner and upper, Hydraulic Circulation pump is arranged in pump housing and is connected with the motor that is arranged at pump housing outside, the upper end of described pump housing is provided with circulating pump pipeline opening for feed and recycle pump discharge port, described circulating pump pipeline opening for feed is communicated with the bottom of anaerobic fermentation tank by establishing valvular feed-pipe, and described Hydraulic Circulation pump is connected with hydraulic mixing pipe by the discharge nozzle through recycle pump discharge port; When hydraulic mixing and fluid materials charging integral system are during with hydraulic mixing mode operation, material in described anaerobic fermentation tank enters in pump housing by circulating pump pipeline opening for feed, pump housing and Hydraulic Circulation pump bear tank body hydraulic pressure, material in described pump housing passes through Hydraulic Circulation pump delivery to hydraulic mixing pipe, material enters in anaerobic fermentation tank by hydraulic mixing pipe, forms closed circulation.
When hydraulic mixing and fluid materials charging integral system move with feed mode, described pump housing is arranged in feed tank, the side of pump housing is provided with pump housing opening for feed, during described Hydraulic Circulation pump operation, first close the valve on the discharge nozzle being communicated with anaerobically fermenting pot bottom, open pump housing opening for feed, the fluid materials in feed tank is by Hydraulic Circulation pump delivery to hydraulic mixing pipe again, and fluid materials enters in anaerobic fermentation tank by hydraulic mixing pipe.
After described fermentation, the online solid-liquid separation system of material comprises buffering tank body I, surge tank II, fast air-operated valve, solid-liquid separating machine, frequency modulation spiral pump, pressure detector, liquid level detecting switch and backflow sump pump, wherein cushioning tank body I is communicated with the bottom of anaerobic fermentation tank by pipeline, described fast air-operated valve is arranged on the pipeline between buffering tank body I and anaerobic fermentation tank, described liquid level detecting switch comprises and is arranged at respectively the upper of surge tank I inwall, the upper liquid level switch of bottom and lower liquid level switch, described frequency modulation spiral pump is connected with solid-liquid separating machine with the bottom of buffering tank body I respectively by pipeline, described pressure detector is arranged on the pipeline between frequency modulation spiral pump and solid-liquid separating machine, described solid-liquid separating machine is connected with the top of surge tank II by pipeline, the bottom of described surge tank II is connected with the natural pond liquid return line that is arranged at anaerobic fermentation tank inner and upper by backflow sump pump and pipeline.
After described fermentation, the operation scheme of the online solid-liquid separation system of material is: pressure detector detects the front charging mouth pressure of solid-liquid separating machine, when pressure being detected and be greater than 1000Kpa, reduce frequency modulation spiral pump running frequency, when pressure being detected lower than 100Kpa, improve frequency modulation spiral pump running frequency; When upper liquid level switch detects signal, close fast air-operated valve, when liquid level switch detects signal instantly, open fast air-operated valve; The isolated natural pond of described solid-liquid separating machine liquid flows in surge tank II, and the natural pond liquid in described surge tank II is back in anaerobic fermentation tank by backflow sump pump.The outer wall of described buffering tank body I and surge tank II is provided with insulation construction and upper end is provided with top cover.
Under described dry material liquid level, without stopping up spiral feed system, comprise drive unit, worm conveyor sleeve pipe, worm conveyor central shaft and worm conveyor conveying blade, wherein worm conveyor central shaft is arranged in worm conveyor sleeve pipe, and one end is connected with drive unit, described worm conveyor central shaft is provided with worm conveyor conveying blade, described worm conveyor sleeve pipe is provided with worm conveyor sleeve pipe opening for feed near one end of drive unit, the other end is provided with worm conveyor sleeve pipe discharge port, the discharge port end of described worm conveyor sleeve pipe inserts and is arranged in the helical feed machine jar body mounting sleeve on anaerobic fermentation tank top, and be positioned at below anaerobically fermenting tank level.
Described helical feed machine jar body mounting sleeve is provided with worm conveyor discharging position hydraucone near the end of discharge port, described worm conveyor sleeve pipe discharge port comprises and being arranged on worm conveyor sleeve pipe, the worm conveyor upside discharge port of downside and worm conveyor downside discharge port, the length of described worm conveyor upside discharge port and worm conveyor downside discharge port is 3-6 pitch, its width is the 1/4-1/3 of sleeve pipe circumference, it is normal belt type spiral blade that the screw-blade that is installed on discharge port section has 1-2 sheet, corresponding within the scope of other 2-4 pitch on discharge port section screw shaft, screw-blade not being installed.
Advantage of the present invention and beneficial effect are:
1. the present invention adopts comprehensive, the compound heat preservation of tank skin, tank deck and pot bottom, can effectively prevent that tank body from arriving external environment by forms such as radiation, conduction and convections by heat loss, improves tank body heat insulation effect.
2. the present invention can agricultural stalk be both unique fermentation raw material, can be also stalk and the fermentation of feces of livestock and poultry mixing raw material.
3. the present invention improves material concentration in input concentration and fermentation, adopts dry feed method and high density anaerobic fermentation technology, reduces material and heats required energy consumption.
4. the present invention adopts closed waterpower circulation stirring mode, reduces natural pond liquid and refluxes and the thermal losses of hydraulic mixing process.
5. in the present invention, relate under fermentor tank heat preserving method, fermentor tank hydraulic mixing and fluid materials charging integral method, the rear online solid-liquid separating method of material of fermentation, dry material (or solid substances) fermentation tank level without stopping up a plurality of subsystems such as spiral feed process, by the utilization of combining of a plurality of methods, reduce tank body heat radiation, reduce tank body charging energy consumption, improve tank body discharging heat recuperation, improve engineering Energy output, thereby it is very high to have overcome cold district biogas energy consumption, be difficult to the shortcoming of operation winter.
Accompanying drawing explanation
Fig. 1 is the structural representation of the windproof and heat insulation integrated system of tank skin, tank deck in the present invention;
Fig. 2 is the structural representation of tank base insulation and waterproof integrated system in the present invention;
Fig. 3 is the structural representation of fermentor tank hydraulic mixing and fluid materials integral system in the present invention;
Fig. 4 is the mounting means schematic diagram of Hydraulic Circulation pump in the present invention;
Fig. 5 is the structural representation of the rear online solid-liquid separation system of material of fermentation in the present invention;
Fig. 6 be in the present invention under dry material liquid level without the structural representation that stops up spiral feed system;
Fig. 7 be in the present invention under dry material liquid level without the mounting means schematic diagram that stops up spiral feed system.
Wherein: 1 is tank skin, 2 is preservative coat, 3 is thermal insulation layer I, 4 is thermal insulation layer II, 5 is steel rack, 6 is thermal insulation layer III, 7 is color steel protective layer, 8 for ramming soil and concrete cushion, 9 is reinforced concrete foundation, 10 is steel wire net rack, 11 is polyurethane foam sealing material, 12 is extruded sheet thermal insulation layer, 13 is fermented feed liquid, 14 is hydraulic mixing pipe, 15 is anaerobic fermentation tank, 16 is Hydraulic Circulation pump, 17 is feed tank, 18 is motor, 19 is recycle pump discharge port, 20 is pump housing opening for feed, 21 is pump housing, 22 is circulating pump pipeline opening for feed, 23 is natural pond liquid return line, 24 is tensimeter, 25 is hand sluice valve, 26 is fast air-operated valve, 27 is surge tank I, 28 is upper liquid level switch, 29 is lower liquid level switch, 30 is frequency modulation spiral pump, 31 is solid-liquid separating machine, 32 is backflow sump pump, 33 is surge tank II, 34 is worm conveyor motor, 35 is worm conveyor step-down gear, 36 is opening for feed, 37 is worm conveyor sleeve pipe, 38 is helical feed machine jar body mounting sleeve, 39 is worm conveyor conveying blade, 40 is worm conveyor discharging position hydraucone, 41 is worm conveyor upside discharge port, 42 is worm conveyor downside discharge port, 43 is worm conveyor central shaft, 44 is worm conveyor, 45 is liquid level.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The present invention includes under anaerobic fermentation tank 15, fermentor tank heat-insulation system, fermentor tank hydraulic mixing and fluid materials charging integral system, the rear online solid-liquid separation system of material of fermentation and dry material liquid level without stopping up spiral feed system, wherein fermentor tank heat-insulation system is arranged on the outer wall and tank base of anaerobic fermentation tank 15, described fermentor tank hydraulic mixing is all connected with anaerobic fermentation tank 15 with fluid materials charging integral system and the rear online solid-liquid separation system of material of fermentation, is arranged at the upper end of anaerobic fermentation tank 15 under described dry material liquid level without obstruction spiral feed system.Dry material is by being delivered under the liquid level in anaerobic fermentation tank 15 without stopping up spiral feed system under dry material liquid level, fluid materials is delivered in anaerobic fermentation tank 15 by fermentor tank hydraulic mixing and fluid materials charging integral system, and the material after fermentation carries out solid, liquid separation by the online solid-liquid separation system of material after fermenting.
Described fermentor tank heat-insulation system comprises that the windproof and heat insulation integrated system of tank skin, tank deck and/or tank base are incubated, waterproof integrated system.As shown in Figure 1, on the tank skin 1 that the windproof and heat insulation integrated system of described tank skin, tank deck is described anaerobic fermentation tank 15 and the outside surface of tank deck, be provided with successively from the inside to the outside preservative coat 2, thermal insulation layer I3, thermal insulation layer II4, steel rack 5, thermal insulation layer III6 and color steel protective layer 7.Thermal insulation layer I3 is reflective heat-insulation paint layer, and thermal insulation layer I3 will spray evenly, guarantees tank deck and tank skin uniform fold one deck thermal insulating coating layer.Thermal insulation layer II4 is the lagging materials such as rock-wool heat insulation plate or pure aluminium silicate warming plate, and thermal insulation layer II4 is soft lagging material, and its applied thickness northeastward should be lower than 400mm with northwest extremely frigid zones, can be between 150-300mm in North China.Steel rack 5 is close to the outside surface of thermal insulation layer II4, seamless between the two, and the outside surface of steel rack 5 is provided with 3-4cm thorn-like projection.Steel rack 5 is connected to integral body by methods such as welding, bolt anchorings, and thermal insulation layer II4 is all covered, and the single mesh area of steel rack 5 is not more than 10cm2.The effect of steel rack 5 is two, and one is thermal insulation layer II4 fixedly, makes it be close to tank skin and tank deck, between thermal insulation layer II4 and tank body steel plate, does not stay gap; Its two adhesion layer as polyurethane foam material outside steel wire net rack 5, on steel wire net rack, requirement has the thorn-like projection of 3-4cm, and between two root thorn shape projections, mean distance is between 2-3cm.Outside steel rack 5, adopt the mode of direct spraying, take thorn-like projection as dirt settling, coating thickness is 5cm polyurethane foaming layer (being thermal insulation layer III6), and the effect of polyurethane foaming layer (thermal insulation layer III6) is windproof, moistureproof and insulation, and its coating thickness requires to be not less than 5cm; Wherein the Main Function of most external color steel protective layer 7 is to be that base insulating layer improves protection, prevents from exposing to the sun and rain etc. causing thermal insulation layer aging.Windproof and the heat insulation integrated system of tank skin, tank deck is a kind of compound heat preserving method, can effectively prevent that tank body from arriving external environment by forms such as radiation, conduction and convections by heat loss.
As shown in Figure 2, the bottom that described tank base is incubated, waterproof integrated system is anaerobic fermentation tank 15 is provided with reinforced concrete foundation 9, steel wire net rack 10, extruded sheet thermal insulation layer 12 and pea gravel concreten protective layer from bottom to up successively.Steel wire net rack 10 is installed after tank body installs on tank body reinforced concrete foundation 9, when steel wire net rack 10 is installed, is strained, be close to the bottom of anaerobic fermentation tank 15, and be welded as integral body with tank skin 1, require steel wire net rack 10 load to be not less than 10 tons/m
2on steel wire net rack 10, lay 200mm extruded sheet thermal insulation layer 12, monolayer extrusion plate thickness 100mm or 50mm, lay two-layer or four layers, extruded sheet is laid the method that adopts the fissure of displacement to lay, the seam between extruded sheet between different layers staggered, and seam filling polyurethane foam material 11 between seam and extruded sheet and tank skin between extruded sheet and extruded sheet, play sealing and fixed action, tank base thermal insulation layer and tank skin are combined into integral body.On extruded sheet, build 50-100mm pea gravel concreten protective layer.
As Fig. 3, shown in Fig. 4, described fermentor tank hydraulic mixing and fluid materials charging integral system comprise hydraulic mixing pipe 14 and Hydraulic Circulation pump 16, wherein hydraulic mixing pipe 14 is arranged at anaerobic fermentation tank 15 inner and upper, Hydraulic Circulation pump 16 is arranged in the pump housing 21 of sealing, and be connected with the slush pump motor 18 that is arranged at pump housing 21 outsides, the upper end of pump housing 21 is provided with circulating pump pipeline opening for feed 22 and recycle pump discharge port 19, circulating pump pipeline opening for feed 22 is communicated with the bottom of anaerobic fermentation tank 15 by establishing valvular feed-pipe, Hydraulic Circulation pump 16 is connected with hydraulic mixing pipe 14 by the discharge nozzle through recycle pump discharge port 19.Pump housing 21 is arranged in feed tank 17, and the side of pump housing 21 is provided with pump housing opening for feed 20.During Hydraulic Circulation pump 16 (now with regular mud pump mode operation) operation, first close the valve on the feed-pipe being communicated with anaerobic fermentation tank 15 bottoms, open again pump housing opening for feed 20, fluid materials in feed tank 17 is delivered in hydraulic mixing pipe 14 by Hydraulic Circulation pump 16, and fluid materials enters in anaerobic fermentation tank 15 by hydraulic mixing pipe 14.
Fermentor tank hydraulic mixing and fluid materials charging integral system can hydraulic mixing pattern and two kinds of modes of fluid materials feed mode move.When with hydraulic mixing mode operation, pump housing 21 sidepiece pump housing opening for feed 20 sealings, the interior material of anaerobic fermentation tank 15 enters in pump housing 21 by circulating pump pipeline opening for feed 22, pump housing 21 and Hydraulic Circulation pump 16 bear tank body hydraulic pressure, material in pump housing 21 reenters in anaerobic fermentation tank 15 under the drive of Hydraulic Circulation pump 16, material closed circulation under this kind of pattern, can make full use of the hydraulic pressure that tank body height produces, improve the mass transport amount of Hydraulic Circulation pump 16, reduce the headloss of fluid calorific loss and Hydraulic Circulation pump 16.While moving with fluid materials feed mode, open pump housing 21 sidepiece pump housing opening for feeds 20, close circulating pump pipeline opening for feed 22 valve before, the fluid materials such as the feces of livestock and poultry after homogenate join in feed tank 17, under the pump action of Hydraulic Circulation pump 16, by hydraulic mixing pipe 14, enter in anaerobic fermentation tank 15.
As shown in Figure 5, after described fermentation, the online solid-liquid separation system of material is arranged at indoor, comprise buffering tank body I27, surge tank II33, fast air-operated valve 26, solid-liquid separating machine 31, frequency modulation spiral pump 30, pressure detector, liquid level detecting switch and backflow sump pump 32, wherein cushioning tank body I27 is communicated with the bottom of anaerobic fermentation tank 15 by pipeline, fast air-operated valve 26 is arranged on the pipeline between buffering tank body I27 and anaerobic fermentation tank 15, described liquid level detecting switch comprises on the inwall that is arranged at respectively surge tank I27, the upper liquid level switch 28 of bottom and lower liquid level switch 29.Frequency modulation spiral pump 30 is connected with solid-liquid separating machine 31 with the bottom of buffering tank body I27 respectively by pipeline, and frequency modulation spiral pump 30 needs supporting variable-frequency motor, realizes frequency modulation spiral pump 30 flows adjustable continuously.Pressure detector (tensimeter 24) is arranged on the pipeline between frequency modulation spiral pump 30 and solid-liquid separating machine 31.Solid-liquid separating machine 31 is connected with the top of surge tank II33 by pipeline, and the bottom of surge tank II33 is connected with the natural pond liquid return line 23 that is arranged at anaerobic fermentation tank 15 inner and upper by backflow sump pump 32 and pipeline.Buffering tank body I27 and surge tank II33 can also be the forms of pond body, and the outer wall of pond body is provided with insulation construction and upper end is provided with top cover.Wrap up with lagging material at the position of streams online solid-liquid separation system of material after fermentation.
After described fermentation, the operation scheme of the online solid-liquid separation system of material is: pressure detector detects the front charging mouth pressure of solid-liquid separating machine 31, when pressure being detected and be greater than 1000Kpa (gauge pressure), reduce frequency modulation spiral pump 30 running frequencies, when pressure being detected lower than 100Kpa (gauge pressure), improve frequency modulation spiral pump 30 running frequencies; When upper liquid level switch 28 detects signal, close fast air-operated valve 26, when liquid level switch 29 detects signal instantly, open fast air-operated valve 26.The isolated natural pond of solid-liquid separating machine 31 liquid flows in surge tank II33, and the natural pond liquid in surge tank II33 is back in anaerobic fermentation tank 15 by backflow sump pump 32.
As shown in Figure 6, Figure 7, under described dry material liquid level, without stopping up spiral feed system, comprise drive unit, worm conveyor sleeve pipe 37, worm conveyor central shaft 43 and worm conveyor conveying blade 39, wherein worm conveyor central shaft 43 is arranged in worm conveyor sleeve pipe 37 and one end is connected with drive unit, and worm conveyor central shaft 43 is provided with worm conveyor conveying blade 39.Worm conveyor sleeve pipe 37 is provided with worm conveyor sleeve pipe opening for feed 36 near one end of drive unit, the other end is provided with worm conveyor sleeve pipe discharge port, and the discharge port end of worm conveyor sleeve pipe 37 inserts in the helical feed machine jar body mounting sleeve 38 that is arranged on anaerobic fermentation tank 15 tops and is positioned at anaerobic fermentation tank 15 liquid level belows.Helical feed machine jar body mounting sleeve 38 is provided with worm conveyor discharging position hydraucone 40 near discharge port end.Worm conveyor sleeve pipe discharge port comprises worm conveyor upper part discharge port 41 and the worm conveyor bottom discharge port 42 that is arranged at the worm conveyor sleeve pipe 37 upper and lower sides of end, the length of worm conveyor upper part discharge port 41 and worm conveyor bottom discharge port 42 is 3-6 pitch, and its width is the 1/4-1/3 of sleeve pipe circumference.It is normal belt type spiral blade that the worm conveyor conveying blade 39 that is installed on opening for feed section has 1-2 sheet, corresponding within the scope of other 2-4 pitch on discharge port section screw shaft, worm conveyor conveying blade 39 not being installed.Described drive unit comprises worm conveyor motor 34 and worm conveyor step-down gear 35.
Embodiment
Technological method of the present invention can be applied to the biogas engineering of the independent stalk in northern China cold district or stalk and cow dung mixing raw material.The biogas engineering of 1200 cubic metres of construction scales of take is illustrated as case study on implementation.
This place's engineering is positioned at China's In Northwest Jilin, winter nighttime temperature at-30 ℃, daytime temperature is at-15 ℃--between 25 ℃, this place's engineering be take straw raw material as main, and cow dung raw material is auxiliary, and design year is processed 1200 tons of straw, year is processed 3650 tons of cow dungs, produces biogas 46.95 ten thousand m per year
3(produce biogas 12861m average every day
3).Engineering actual motion effect reaches design requirements completely.
The interior operating temperature of this engineering anaerobic fermentation tank 15 is throughout the year stable is controlled at 35 ℃, and under winter severe cold condition (24 hourly average temperature-20 ℃ are arrived-25 ℃), under engineering normal running (operation) conditions, biogas 133Nm day by day on average often burns
3(methane boiler thermo-efficiency 93%, tank body heat exchange pipeline efficiency 90%), engineering operation hear rate/engineering total energy output equals 10.33%.Determine by experiment, stopping in charging situation, maintaining tank body temperature is 35 ℃, only needs the biogas 21m that burns every day
3, tank body heat insulation effect reaches design requirements completely.
Fermentor tank hydraulic mixing and fluid materials charging integral method have been realized integrated by the charging of tank body hydraulic mixing and fluid materials, both reduced engineering construction cost, can make full use of the pressure that tank body self hydraulic pressure produces carrying out hydraulic stirring again, reduced in fluid materials course of conveying and declined because headloss causes flow, two 15KW Hydraulic Circulation pumps 16 (wherein one is standby) have been installed in engineering actual motion, and Hydraulic Circulation pump 16 design discharges are 100m
3/ h, lift 15m, tank body height 8m, the about 80m of actual measurement strength
3/ h, proves that this method of design can effectively overcome the flow reduction that 16 headlosses of Hydraulic Circulation pump cause.
The online solid-liquid separating method of fermentation materials, can effectively reduce heat loss in solid-liquid separation process, engineering measurement shows, liquid temp >=33 ℃, natural pond after solid-liquid separating machine 31 is separated, the liquid cooling of solid-liquid separation process natural pond is lower than 2 ℃, and online solid-liquid separating method is very effective.
Under dry material liquid level without stop up spiral feed process for conveying rub rear dry rice straw, blue or green storage forage is very effective, can in the situation that not adding water, directly solid substances be delivered to below tank body liquid level, in the situation that guaranteeing fermentor tank sealing, anaerobism, realize the efficient conveying of solid substances.And energy consumption is very low, actual measurement shows, ancillary engineering facility 4KW worm conveyor, and dry straw inlet amount can reach 1 ton/hour, and charging efficiency is far above pumping mode.
Claims (10)
1. a less energy-consumption that seasons oneself to cold regional moves bionethanation system, it is characterized in that: comprise anaerobic fermentation tank (15), fermentor tank heat-insulation system, fermentor tank hydraulic mixing and fluid materials charging integral system, after fermentation, under the online solid-liquid separation system of material and dry material liquid level, nothing is stopped up spiral feed system, wherein fermentor tank heat-insulation system is arranged on the outer wall and tank base of anaerobic fermentation tank (15), described fermentor tank hydraulic mixing is all connected with anaerobic fermentation tank (15) with the rear online solid-liquid separation system of material of fluid materials charging integral system and fermentation, under described dry material liquid level, without obstruction spiral feed system, be arranged at the upper end of anaerobic fermentation tank (15), dry material is by being delivered under the liquid level in anaerobic fermentation tank (15) without stopping up spiral feed system under dry material liquid level, fluid materials is delivered in anaerobic fermentation tank (15) by fermentor tank hydraulic mixing and fluid materials charging integral system, material after fermentation is consolidated by the online solid-liquid separation system of material after fermenting, liquid is separated.
2. by the less energy-consumption operation bionethanation system that seasons oneself to cold regional claimed in claim 1, it is characterized in that: described fermentor tank heat-insulation system comprises that the windproof and heat insulation integrated system of tank skin, tank deck and tank base are incubated, waterproof integrated system, on the tank skin (1) that the windproof and heat insulation integrated system of described tank skin, tank deck is described anaerobic fermentation tank (15) and the outside surface of tank deck, is provided with successively from the inside to the outside preservative coat (2), thermal insulation layer I (3), thermal insulation layer II (4), steel rack (5), thermal insulation layer III (6) and color steel protective layer (7); Described tank base insulation, waterproof integrated system are that the bottom of described anaerobic fermentation tank (15) is provided with reinforced concrete foundation (9), steel wire net rack (10), extruded sheet thermal insulation layer (12) and pea gravel concreten protective layer from bottom to up successively.
3. by the less energy-consumption operation bionethanation system that seasons oneself to cold regional claimed in claim 2, it is characterized in that: described thermal insulation layer I (3) is reflective heat-insulation paint layer, described thermal insulation layer II (4) is rock-wool heat insulation plate or pure aluminium silicate warming plate, described steel rack (5) is close to thermal insulation layer II outside surface (4), the outside surface of steel rack (5) is provided with thorn-like projection, and described thermal insulation layer III (6) is polyurethane foaming layer and is attached in the thorn-like projection of steel rack (5) outside surface; Described steel wire net rack (10) is close on the reinforced concrete foundation (9) of anaerobic fermentation tank (15) bottom, steel wire net rack (10) is connected with the tank skin of anaerobic fermentation tank (15), described extruded sheet thermal insulation layer (12) is for multilayer and adopt fissure of displacement mode to lay, the seam crossing filling polyurethane foam material (11) between extruded sheet and extruded sheet and between extruded sheet and tank skin (1).
4. by the less energy-consumption operation bionethanation system that seasons oneself to cold regional claimed in claim 1, it is characterized in that: described fermentor tank hydraulic mixing and fluid materials charging integral system comprise hydraulic mixing pipe (14) and Hydraulic Circulation pump (16), wherein hydraulic mixing pipe (14) is arranged at anaerobic fermentation tank (15) inner and upper, Hydraulic Circulation pump (16) is arranged in pump housing (21), and the motor (18) outside with being arranged at pump housing (21) is connected, the upper end of described pump housing (21) is provided with circulating pump pipeline opening for feed (22) and recycle pump discharge port (19), described circulating pump pipeline opening for feed (22) is communicated with the bottom of anaerobic fermentation tank (15) by establishing valvular feed-pipe, described Hydraulic Circulation pump (16) is connected with hydraulic mixing pipe (14) by the discharge nozzle through recycle pump discharge port (19), when hydraulic mixing and fluid materials charging integral system are during with hydraulic mixing mode operation, material in described anaerobic fermentation tank (15) enters in pump housing (21) by circulating pump pipeline opening for feed (22), pump housing (21) and Hydraulic Circulation pump (16) bear tank body hydraulic pressure, material in described pump housing (21) is delivered in hydraulic mixing pipe (14) by Hydraulic Circulation pump (16), material enters in anaerobic fermentation tank (15) by hydraulic mixing pipe (14), forms closed circulation.
5. by the less energy-consumption operation bionethanation system that seasons oneself to cold regional claimed in claim 4, it is characterized in that: when hydraulic mixing and fluid materials charging integral system move with feed mode, described pump housing (21) is arranged in feed tank (17), the side of pump housing (21) is provided with pump housing opening for feed (20), during described Hydraulic Circulation pump (16) operation, first close the valve on the discharge nozzle being communicated with anaerobic fermentation tank (15) bottom, open again pump housing opening for feed (20), fluid materials in feed tank (17) is delivered in hydraulic mixing pipe (14) by Hydraulic Circulation pump (16), fluid materials enters in anaerobic fermentation tank (15) by hydraulic mixing pipe (14).
6. by the less energy-consumption operation bionethanation system that seasons oneself to cold regional claimed in claim 1, it is characterized in that: after described fermentation, the online solid-liquid separation system of material comprises buffering tank body I (27), surge tank II (33), fast air-operated valve (26), solid-liquid separating machine (31), frequency modulation spiral pump (30), pressure detector, liquid level detecting switch and backflow sump pump (32), wherein cushioning tank body I (27) is communicated with the bottom of anaerobic fermentation tank (15) by pipeline, described fast air-operated valve (26) is arranged on the pipeline between buffering tank body I (27) and anaerobic fermentation tank (15), described liquid level detecting switch comprises and is arranged at respectively the upper of surge tank I (27) inwall, the upper liquid level switch (28) of bottom and lower liquid level switch (29), described frequency modulation spiral pump (30) is connected with solid-liquid separating machine (31) with the bottom of buffering tank body I (27) respectively by pipeline, described pressure detector is arranged on the pipeline between frequency modulation spiral pump (30) and solid-liquid separating machine (31), described solid-liquid separating machine (31) is connected with the top of surge tank II (33) by pipeline, the bottom of described surge tank II (33) is connected with the natural pond liquid return line (23) that is arranged at anaerobic fermentation tank (15) inner and upper by backflow sump pump (32) and pipeline.
7. by the less energy-consumption operation bionethanation system that seasons oneself to cold regional claimed in claim 6, it is characterized in that: after described fermentation, the operation scheme of the online solid-liquid separation system of material is: pressure detector detects the front charging mouth pressure of solid-liquid separating machine (31), when pressure being detected and be greater than 1000Kpa, reduce frequency modulation spiral pump (30) running frequency, when pressure being detected lower than 100Kpa, improve frequency modulation spiral pump (30) running frequency; When upper liquid level switch (28) detects signal, close fast air-operated valve (26), when liquid level switch (29) detects signal instantly, open fast air-operated valve (26); The isolated natural pond of described solid-liquid separating machine (31) liquid flows in surge tank II (33), and the natural pond liquid in described surge tank II (33) is back in anaerobic fermentation tank (15) by backflow sump pump (32).
8. by the less energy-consumption that the seasons oneself to cold regional operation bionethanation system described in claim 6 or 7, it is characterized in that: the outer wall of described buffering tank body I (27) and surge tank II (33) is provided with insulation construction and upper end is provided with top cover.
9. by the less energy-consumption operation bionethanation system that seasons oneself to cold regional claimed in claim 1, it is characterized in that: under described dry material liquid level, without stopping up spiral feed system, comprise drive unit, worm conveyor sleeve pipe (37), worm conveyor central shaft (43) and worm conveyor conveying blade (39), wherein worm conveyor central shaft (43) is arranged in worm conveyor sleeve pipe (37), and one end is connected with drive unit, described worm conveyor central shaft (43) is provided with worm conveyor conveying blade (39), described worm conveyor sleeve pipe (37) is provided with worm conveyor sleeve pipe opening for feed (36) near one end of drive unit, the other end is provided with worm conveyor sleeve pipe discharge port, the discharge port end of described worm conveyor sleeve pipe (37) inserts and is arranged in the helical feed machine jar body mounting sleeve (38) on anaerobic fermentation tank (15) top, and be positioned at below anaerobic fermentation tank (15) liquid level.
10. by the less energy-consumption operation bionethanation system that seasons oneself to cold regional claimed in claim 9, it is characterized in that: described helical feed machine jar body mounting sleeve (38) is provided with worm conveyor discharging position hydraucone (40) near the end of discharge port, described worm conveyor sleeve pipe discharge port comprises worm conveyor upside discharge port (41) and the worm conveyor downside discharge port (42) that is arranged at worm conveyor sleeve pipe (37) upper side, the length of described worm conveyor upside discharge port (41) and worm conveyor downside discharge port (42) is 3-6 pitch, its width is the 1/4-1/3 of sleeve pipe circumference, it is normal belt type spiral blade that the screw-blade that is installed on discharge port section has 1-2 sheet, corresponding within the scope of other 2-4 pitch on discharge port section screw shaft, screw-blade not being installed.
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