CN104120081B - A kind of less energy-consumption of the area that seasons oneself to cold runs bionethanation system - Google Patents

A kind of less energy-consumption of the area that seasons oneself to cold runs bionethanation system Download PDF

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CN104120081B
CN104120081B CN201310150383.6A CN201310150383A CN104120081B CN 104120081 B CN104120081 B CN 104120081B CN 201310150383 A CN201310150383 A CN 201310150383A CN 104120081 B CN104120081 B CN 104120081B
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tank
anaerobic fermentation
pump
worm conveyor
fermentation tank
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CN104120081A (en
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郭荣波
许晓晖
戴萌
杨智满
罗生军
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Qingdao Institute of Bioenergy and Bioprocess Technology of CAS
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Qingdao Institute of Bioenergy and Bioprocess Technology of CAS
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    • C12M21/00—Bioreactors or fermenters specially adapted for specific uses
    • C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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    • C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
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    • C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
    • C12M47/10—Separation or concentration of fermentation products
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

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Abstract

The invention belongs to Biomass Energy Utilization and field of environment protection, the bionethanation system that specifically a kind of less energy-consumption of the area that seasons oneself to cold runs.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 without blocking spiral feed system, wherein fermentor tank heat-insulation system is arranged at outer wall and the tank base of anaerobic fermentation tank, fermentor tank hydraulic mixing is all connected with anaerobic fermentation tank with fluid materials charging integral system and the rear online solid-liquid separation system of material that ferments, be arranged at the upper end of anaerobic fermentation tank without blocking spiral feed system under dry material liquid level, dry material is by under being delivered in anaerobic fermentation tank liquid level without blocking spiral feed system under dry material liquid level, the present invention reduces tank body heat radiation and tank body charging energy consumption, improve tank body discharging heat recuperation, improve engineered energy output, thus it is very high to overcome cold district biogas energy consumption, be difficult to the shortcoming run winter.

Description

A kind of less energy-consumption of the area that seasons oneself to cold runs bionethanation system
Technical field
The invention belongs to Biomass Energy Utilization and field of environment protection, specifically a kind of less energy-consumption of the area that seasons oneself to cold runs bionethanation system.
Background technology
The northern area of China such as northeast, North China and the Northwest are the main producing regions of China's agricultural, and husbandry is flourishing, a large amount of agricultural crop straw of annual generation and feces of livestock and poultry, possess the good raw material basis of Developing Biomass Energy Industry.But these are regional, especially northeast and the Northwest, winter climate is very cold, traditional biogas engineering winter operation energy consumption is 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 of this phenomenon is caused to be 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 to remove sand, therefore cause material fermentation concentration very low, and most of heat (the being greater than 80%) demand in biogas engineering operational process comes from heating of fermentation materials (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 lays benzene plate and rock wool based on tank wall substantially, and tank base does not do thermal insulation layer substantially, and heat insulation effect is poor, and winter operation heat dissipation capacity is large; 3rd, the heat waste of tank body discharging unit is serious, and biogas residue and biogas liquid is without exhaust heat recovering method; 4th, raw material type is single, and based on feces of livestock and poultry, production potential is little, and fermenting process production capacity is low.It is very high at north cold area operation energy consumption that above-mentioned reason causes the existing biogas engineering of China jointly, and energy output is very poor.
In order to improve China's existing biogas engineering net energy output, guarantee engineering is run in the winter time also good Energy output and economic benefit, must from raising material feeding concentration (dry feed or solid feedstock), forced fermentation insulation of equipment and pipeline Low heat dissipation mounting design, carry out natural pond fluid residual heat recovery and reduce 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, a kind of less energy-consumption of the area that seasons oneself to cold is the object of the present invention is to provide to run bionethanation system.This system reduces tank body heat radiation and tank body charging energy consumption, improves tank body discharging heat recuperation, improve engineered energy output, thus it is very high to overcome cold district biogas energy consumption, is difficult to the shortcoming run winter.
To achieve these goals, the present invention is by the following technical solutions:
A kind of less energy-consumption of the area that seasons oneself to cold runs bionethanation system, 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 without blocking spiral feed system, wherein in the fermentor tank heat-insulation system outer wall that is arranged at anaerobic fermentation tank and tank base, described fermentor tank hydraulic mixing is all connected with anaerobic fermentation tank with fluid materials charging integral system and the rear online solid-liquid separation system of material that ferments, be arranged at the upper end of anaerobic fermentation tank without blocking spiral feed system under described dry material liquid level, dry material is by under being delivered in anaerobic fermentation tank liquid level without blocking 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 undertaken solid by the online solid-liquid separation system of material after fermentation, liquid is separated.
Described fermentor tank heat-insulation system comprise tank skin, tank deck windproof and heat insulation integrated system and/or tank base is incubated, waterproof integrated system, the windproof and heat insulation integrated system of described tank skin, tank deck is that the tank skin of described anaerobic fermentation tank and the outside surface of tank deck are provided with preservative coat, thermal insulation layer I, thermal insulation layer II, steel rack, thermal insulation layer III and color steel protective layer from the inside to the outside successively; 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, thermal insulation layer II outside surface is close to by described steel rack, 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 upper, Hydraulic Circulation pump to be arranged in pump housing and to be connected with the motor being 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 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 in 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 run 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 be communicated with anaerobically fermenting pot bottom, open pump housing opening for feed again, the fluid materials in feed tank is by Hydraulic Circulation pump delivery in hydraulic mixing pipe, and fluid materials is entered 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 cushion tank body I to be 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 the upper of surge tank I inwall respectively, the upper liquid level switch of bottom and lower liquid level switch, described frequency modulation spiral pump is connected with the bottom and solid-liquid separating machine of cushioning 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 by the top of pipeline with surge tank II, the bottom of described surge tank II is connected with the natural pond liquid return line being arranged at anaerobic fermentation tank inner upper by backflow sump pump and pipeline.
After described fermentation, the operation scheme of the online solid-liquid separation system of material is: charging mouth pressure before pressure detector detection solid-liquid separating machine, when detecting that pressure is greater than 1000Kpa, reducing frequency modulation spiral pump running frequency, when pressure being detected lower than 100Kpa, improving 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; Described solid-liquid separating machine isolated natural pond 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.
Drive unit is comprised without blocking spiral feed system under described dry material liquid level, 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 is arranged on worm conveyor sleeve pipe, discharge port on the downside of discharge port and worm conveyor on the upside of the worm conveyor of downside, on the upside of described worm conveyor, on the downside of discharge port and worm conveyor, the length of discharge port is 3-6 pitch, its width is the 1/4-1/3 of sleeve pipe circumference, the screw-blade being installed on discharge port section has 1-2 sheet to be normal belt type spiral blade, screw-blade is not installed corresponding within the scope of other 2-4 pitch on discharge port section screw shaft.
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 tank body by the form such as radiation, conduction and convection by heat loss to external environment, improve tank body heat insulation effect.
2. the present invention can agricultural stalk be both unique fermentation raw material, also can be that stalk and feces of livestock and poultry mixing raw material ferment.
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 backflow and the thermal losses of hydraulic mixing process.
5. in the present invention, relate to fermentor tank heat preserving method, fermentor tank hydraulic mixing and fluid materials charging integral method, ferment after the online solid-liquid separating method of material, dry material (or solid substances) ferment under tank level without blocking multiple subsystems such as spiral feed process, by the conjunctive use of multiple method, reduce tank body heat radiation, reduce tank body charging energy consumption, improve tank body discharging heat recuperation, improve engineered energy output, thus it is very high to overcome cold district biogas energy consumption, be difficult to the shortcoming run winter.
Accompanying drawing explanation
Fig. 1 is the structural representation of windproof and heat insulation integrated system of tank skin in the present invention, tank deck;
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 online solid-liquid separation system of material after fermentation in the present invention;
Fig. 6 is the structural representation of nothing blocking spiral feed system under dry material liquid level in the present invention;
Fig. 7 is the mounting means schematic diagram of nothing blocking spiral feed system under dry material liquid level in the present invention.
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 is rammed earth 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 discharge port on the upside of worm conveyor, 42 is discharge port on the downside of worm conveyor, 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 anaerobic fermentation tank 15, fermentor tank heat-insulation system, fermentor tank hydraulic mixing and fluid materials charging integral system, ferment after under the online solid-liquid separation system of material and dry material liquid level without blocking spiral feed system, wherein in the fermentor tank heat-insulation system outer wall that is arranged at anaerobic fermentation tank 15 and tank base, 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 that ferments, and is arranged at the upper end of anaerobic fermentation tank 15 under described dry material liquid level without blocking spiral feed system.Dry material is by under being delivered in anaerobic fermentation tank 15 liquid level without blocking 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 fermentation.
Described fermentor tank heat-insulation system comprise tank skin, tank deck windproof and heat insulation integrated system and/or tank base is incubated, waterproof integrated system.As shown in Figure 1, the windproof and heat insulation integrated system of described tank skin, tank deck is that the tank skin 1 of described anaerobic fermentation tank 15 and the outside surface of tank deck are provided with preservative coat 2, thermal insulation layer I3, thermal insulation layer II4, steel rack 5, thermal insulation layer III6 and color steel protective layer 7 from the inside to the outside successively.Thermal insulation layer I3 is reflective heat-insulation paint layer, and thermal insulation layer I3 will spray evenly, ensures tank deck and tank skin uniform fold one deck thermal insulating coating layer.Thermal insulation layer II4 is the lagging material 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 lower than 400mm with northwest extremely frigid zones, can between 150-300mm in North China.The outside surface of thermal insulation layer II4 is close to by steel rack 5, 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 for overall by methods such as welding, bolt anchorings, and all covered by thermal insulation layer II4, the single mesh area of steel rack 5 is not more than 10cm2.The effect of steel rack 5 is two, and one fixes thermal insulation layer II4, makes it be close to tank skin and tank deck, does not stay gap between thermal insulation layer II4 and tank body steel plate; It is two as the adhesion layer of polyurethane foam material outside steel wire net rack 5, and steel wire net rack requires the thorn-like projection of 3-4cm, between two root thorn shape projections, mean distance is between 2-3cm.The mode of direct spraying is adopted outside steel rack 5, with thorn-like projection for dirt settling, coating thickness is 5cm polyurethane foaming layer (i.e. thermal insulation layer III6), 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 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 heat preserving method of compound, can effectively prevent tank body by the form such as radiation, conduction and convection by heat loss to external environment.
As shown in Figure 2, described tank base insulation, waterproof integrated system are that the bottom of 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.Namely after tank body installs, on tank body reinforced concrete foundation 9, steel wire net rack 10 is installed, strains, be close to the bottom of anaerobic fermentation tank 15 when steel wire net rack 10 is installed, and be welded as entirety with tank skin 1, require that steel wire net rack 10 load is not less than 10 tons/m 2200mm extruded sheet thermal insulation layer 12 is laid on steel wire net rack 10, monolayer extrusion plate thickness 100mm or 50mm, lay two-layer or four layers, extruded sheet lays the method adopting the fissure of displacement to lay, and the seam between different layers between extruded sheet is staggered, seam and seam filling polyurethane foam material 11 between 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 entirety.50-100mm pea gravel concreten protective layer is built on extruded sheet.
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 upper, Hydraulic Circulation pump 16 is arranged in closed pump housing 21, and be connected with the slush pump motor 18 being arranged at pump housing 21 outside, 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.When Hydraulic Circulation pump 16 (now with regular mud pump mode operation) runs, first close and the valve on the feed-pipe be communicated with bottom anaerobic fermentation tank 15, open pump housing opening for feed 20 again, fluid materials in feed tank 17 is delivered in hydraulic mixing pipe 14 by Hydraulic Circulation pump 16, and fluid materials is entered 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 fluid materials feed mode two kinds of modes run.When with hydraulic mixing mode operation, pump housing 21 sidepiece pump housing opening for feed 20 is closed, in anaerobic fermentation tank 15, material 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, the hydraulic pressure that tank body height produces can be made full use of, improve the mass transport amount of Hydraulic Circulation pump 16, reduce the headloss of fluid calorific loss and Hydraulic Circulation pump 16.When running with fluid materials feed mode, open pump housing 21 sidepiece pump housing opening for feed 20, close the early gate of circulating pump pipeline opening for feed 22, 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, entered in anaerobic fermentation tank 15 by hydraulic mixing pipe 14.
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 cushion tank body I27 to be communicated with by the bottom of pipeline with anaerobic fermentation tank 15, 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 comprise be arranged at surge tank I27 respectively inwall on, the upper liquid level switch 28 of bottom and lower liquid level switch 29.Frequency modulation spiral pump 30 is connected with the bottom and solid-liquid separating machine 31 of cushioning tank body I27 respectively by pipeline, and frequency modulation spiral pump 30 needs supporting variable-frequency motor, realizes frequency modulation spiral pump 30 flow continuously adjustabe.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 by the top of pipeline with surge tank II33, and the bottom of surge tank II33 is connected with the natural pond liquid return line 23 being arranged at anaerobic fermentation tank 15 inner upper by backflow sump pump 32 and pipeline.Buffering tank body I27 and surge tank II33 can also be the form of pond body, and the outer wall of pond body is provided with insulation construction and upper end is provided with top cover.The position of streams online solid-liquid separation system of material after fermentation is wrapped up with lagging material.
After described fermentation, the operation scheme of the online solid-liquid separation system of material is: charging mouth pressure before pressure detector detection solid-liquid separating machine 31, when detecting that pressure is greater than 1000Kpa (gauge pressure), reduce frequency modulation spiral pump 30 running frequency, when pressure being detected lower than 100Kpa (gauge pressure), 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.Solid-liquid separating machine 31 isolated natural pond 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, drive unit, worm conveyor sleeve pipe 37, worm conveyor central shaft 43 and worm conveyor conveying blade 39 is comprised without blocking spiral feed system under described dry material liquid level, wherein worm conveyor central shaft 43 is arranged in worm conveyor sleeve pipe 37 and one end and 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, the discharge port end of worm conveyor sleeve pipe 37 insert be arranged on anaerobic fermentation tank 15 top helical feed machine jar body mounting sleeve 38 in and be positioned at below anaerobic fermentation tank 15 liquid level.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 the worm conveyor upper part discharge port 41 and worm conveyor bottom discharge port 42 that are arranged at the upper and lower side of worm conveyor sleeve pipe 37 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.The worm conveyor conveying blade 39 being installed on opening for feed section has 1-2 sheet to be normal belt type spiral blade, does not install worm conveyor conveying blade 39 corresponding within the scope of other 2-4 pitch on discharge port section screw shaft.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.With the biogas engineering of construction scale 1200 cubic metres for case study on implementation is illustrated.
This place's engineering is positioned at China's In Northwest Jilin, and winter, nighttime temperature was at-30 DEG C, and daytime temperature is at-15 DEG C--between 25 DEG C, this place's engineering is based on straw raw material, and cow dung raw material is auxiliary, design year process straw 1200 tons, year process cow dung 3650 tons, produces biogas 46.95 ten thousand m per year 3(average every day produces biogas 12861m 3).Engineering actual motion effect reaches design requirements completely.
In this engineering anaerobic fermentation tank 15, the long-term stability contorting of operating temperature is at 35 DEG C, under winter severe cold condition (24 hourly average temperature-20 DEG C to-25 DEG C), under engineering normal running (operation) conditions, and average every biogas 133Nm that burns day by day 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, in stopping charging situation, maintaining pot temperature is 35 DEG C, only needs burning biogas 21m every day 3, tank body heat insulation effect reaches design requirements completely.
Tank body hydraulic mixing achieves integrated with the charging of fluid materials with fluid materials charging integral method by fermentor tank hydraulic mixing, both engineering construction cost had been reduced, again can carry out hydraulic stirring make full use of tank body self hydraulic pressure produce pressure, reduce in fluid materials course of conveying and cause due to headloss flow to decline, installed two 15KW Hydraulic Circulation pumps 16 (wherein is for subsequent use) in engineering actual motion, Hydraulic Circulation pump 16 design discharge is 100m 3/ h, lift 15m, tank body height 8m, actual measurement strength is about 80m 3/ h, proves that this method of design effectively can overcome the flow that Hydraulic Circulation pump 16 headloss causes and reduce.
The online solid-liquid separating method of fermentation materials, can effectively reduce heat loss in solid-liquid separation process, engineering measurement shows, solid-liquid separating machine 31 is separated liquid temp >=33 DEG C, rear natural pond, the liquid cooling of solid-liquid separation process natural pond is lower than 2 DEG C, and online solid-liquid separating method is very effective.
Without blocking spiral feed process, rear dry rice straw is rubbed for conveying under dry material liquid level, blue or green storage forage is very effective, directly solid substances can being delivered to below tank body liquid level when not adding water, achieving the efficient conveying of solid substances when ensureing fermentor tank sealing, anaerobism.And energy consumption is very low, actual measurement shows, ancillary engineering facility 4KW worm conveyor, dry straw inlet amount can reach 1 ton/hour, and powder feeding efficiency is far above pumping mode.

Claims (8)

1. the less energy-consumption in the area that seasons oneself to cold runs firedamp gas equipment, 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 without blocking spiral feed system, wherein in the fermentor tank heat-insulation system outer wall that is arranged at anaerobic fermentation tank (15) and tank base, 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 that ferments, be arranged at the upper end of anaerobic fermentation tank (15) without blocking spiral feed system under described dry material liquid level, dry material is by under being delivered in anaerobic fermentation tank (15) liquid level without blocking 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 undertaken solid by the online solid-liquid separation system of material after fermentation, liquid is separated,
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 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 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,
When hydraulic mixing and fluid materials charging integral system run 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), when described Hydraulic Circulation pump (16) is run, first close and the valve on the discharge nozzle be communicated with bottom anaerobic fermentation tank (15), open pump housing opening for feed (20) again, fluid materials in feed tank (17) is delivered in hydraulic mixing pipe (14) by Hydraulic Circulation pump (16), fluid materials is entered in anaerobic fermentation tank (15) by hydraulic mixing pipe (14).
2. run firedamp gas equipment by the less energy-consumption in the area that seasons oneself to cold according to claim 1, it is characterized in that: described fermentor tank heat-insulation system comprises tank skin, windproof and the heat insulation integrated system of tank deck and tank base are incubated, waterproof integrated system, described tank skin, windproof and the heat insulation integrated system of tank deck is that the tank skin (1) of described anaerobic fermentation tank (15) and the outside surface of tank deck are provided with preservative coat (2) from the inside to the outside successively, 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. run firedamp gas equipment by the less energy-consumption in the area that seasons oneself to cold according to 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 for polyurethane foaming layer and be 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. run firedamp gas equipment by the less energy-consumption in the area that seasons oneself to cold according to 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 cushion tank body I (27) to be communicated with by the bottom of pipeline with anaerobic fermentation tank (15), 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 the upper of surge tank I (27) inwall respectively, the upper liquid level switch (28) of bottom and lower liquid level switch (29), described frequency modulation spiral pump (30) is connected with the bottom and solid-liquid separating machine (31) of cushioning 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 by the top of pipeline with surge tank II (33), the bottom of described surge tank II (33) is connected with natural pond liquid return line (23) being arranged at anaerobic fermentation tank (15) inner upper by backflow sump pump (32) and pipeline.
5. run firedamp gas equipment by the less energy-consumption in the area that seasons oneself to cold according to claim 4, it is characterized in that: after described fermentation, the operation scheme of the online solid-liquid separation system of material is: pressure detector detects solid-liquid separating machine (31) front charging mouth pressure, when detecting that pressure is 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); Described solid-liquid separating machine (31) isolated natural pond 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).
6. run firedamp gas equipment by the less energy-consumption in the area that seasons oneself to cold described in claim 4 or 5, 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.
7. run firedamp gas equipment by the less energy-consumption in the area that seasons oneself to cold according to claim 1, it is characterized in that: under described dry material liquid level, comprise drive unit without blocking spiral feed system, 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.
8. run firedamp gas equipment by the less energy-consumption in the area that seasons oneself to cold according to claim 7, 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 comprise be arranged at worm conveyor sleeve pipe (37) upper side worm conveyor on the upside of discharge port (42) on the downside of discharge port (41) and worm conveyor, on the upside of described worm conveyor, on the downside of discharge port (41) and worm conveyor, the length of discharge port (42) is 3-6 pitch, its width is the 1/4-1/3 of sleeve pipe circumference, the screw-blade being installed on discharge port section has 1-2 sheet to be normal belt type spiral blade, screw-blade is not installed corresponding within the scope of other 2-4 pitch on discharge port section screw shaft.
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