CN106675681A - Vehicle-mounted marsh gas compression, separation and liquefaction tank filling machine - Google Patents

Vehicle-mounted marsh gas compression, separation and liquefaction tank filling machine Download PDF

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Publication number
CN106675681A
CN106675681A CN201710009125.4A CN201710009125A CN106675681A CN 106675681 A CN106675681 A CN 106675681A CN 201710009125 A CN201710009125 A CN 201710009125A CN 106675681 A CN106675681 A CN 106675681A
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CN
China
Prior art keywords
tank
biogas
liquefaction
drain sump
compressor
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Application number
CN201710009125.4A
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Chinese (zh)
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CN106675681B (en
Inventor
张永北
张爱诚
罗靖
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HAINAN BEIOU BIOENERGY DEVELOPMENT Co Ltd
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HAINAN BEIOU BIOENERGY DEVELOPMENT Co Ltd
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Publication of CN106675681A publication Critical patent/CN106675681A/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • C10L3/10—Working-up natural gas or synthetic natural gas
    • C10L3/101—Removal of contaminants
    • C10L3/102—Removal of contaminants of acid contaminants
    • C10L3/103—Sulfur containing contaminants
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • C10L3/10—Working-up natural gas or synthetic natural gas
    • C10L3/101—Removal of contaminants
    • C10L3/102—Removal of contaminants of acid contaminants
    • C10L3/104—Carbon dioxide
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
    • C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
    • C10L3/10—Working-up natural gas or synthetic natural gas
    • C10L3/101—Removal of contaminants
    • C10L3/106—Removal of contaminants of water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C11/00—Use of gas-solvents or gas-sorbents in vessels
    • F17C11/007—Use of gas-solvents or gas-sorbents in vessels for hydrocarbon gases, such as methane or natural gas, propane, butane or mixtures thereof [LPG]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Separation By Absorption (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention discloses a vehicle-mounted marsh gas compression, separation and liquefaction tank filling machine. The vehicle-mounted marsh gas compression, separation and liquefaction tank filling machine comprises: a carrier loader and a tank filling machine unit, wherein the tank filling machine unit is mounted on the carrier loader; the tank filling machine unit comprises a desulfurizing tower, a decarbonization washing tank, a dehydration tank, a marsh gas liquefaction tank, and a high-pressure water injection pump, which are sequentially connected in series through a pipeline to form a main gas path; the tank filling machine unit also comprises compressors, the compressors being four-stage or five-stage compressors; the first group of compressors is connected between the desulfurizing tower and the decarbonization washing tank in series, and compresses marsh gas to 8MPa, and dry biogas and liquid carbon dioxide are obtained; the second group of compressors is connected between the dehydration tank and the marsh gas liquefaction tank in series, the obtained dry biogas is compressed to 25MPa through two-stage compression, and finally, the dry biogas and a liquefaction aid are mixed for liquefaction in the liquefaction tank to generate liquefied biogas. The vehicle-mounted marsh gas compression, separation and liquefaction tank filling machine solves the key technical problems about purification, separation, refinement and tank filling of marsh gas, and miniaturization of vehicle-mounted equipment.

Description

A kind of vehicle-mounted methane compression separates liquefaction can packing machine
Technical field
The present invention relates to can order about that the biogas place of production is moved to, on the spot by marsh gas purifying, compression, separation, liquefaction, canned, The device of output liquid carbon dioxide and liquefied methane, specifically refers to a kind of vehicle-mounted methane compression and separates liquefaction can packing machine.
Background technology
The current biogas production of China is existing compared with solid foundation.Production and use of marsh gas popularity rate is higher, and large-sized biogas exploitation is also accumulated Certain basis is tired out.The agriculture and forestry organic waste material for making full use of stock number huge is converted into biogas, develops biological flue gas industry, can be straight Connect for motor vehicle fuel, technology maturation is easy to operate, and cost is relatively low, and combustion heat value is higher, effect preferably, is hopeful extensive Development.The biological flue gas of marsh gas purifying purification, main component is methane, identical with natural gas, for motor vehicle fuel principle Completely the same with natural gas, technology is quite ripe, in the world in the such as Sweden's popularization of some countries of Northern Europe.China's natural gas vapour Car is popularized in many areas, is that biological flue gas drive to have established good basis.
But, agricultural straw refuse converts automobile-used biological flue gas, equally also highly to divide in the face of agriculture and forestry organic waste material resource Dissipate the brought serial difficult problem of scale conversion.Agriculture and forestry organic waste material is focused on a large scale, develops large-scale intensive plant produced, There is resource high degree of dispersion, season excessively to concentrate, store up fortune difficulty etc. and cause the profitability of industry weak, becoming cannot sustainable development The limitation of exhibition.Therefore, people are inquiring into integrated network type large-sized biogas engineering (CN101724659A), change large-scale intensive Mode, to disperse the biogas fermentation device on a fairly large scale (CN105087655A) for the treatment of in situ, on the spot by agriculture and forestry organic waste material turn Change biogas, using pipe network system collection, methane conveying is to processing stand, then is equipped with vehicle-mounted methane processing unit (plant) (CN101949633A), realize that biogas processes mobile operational process, biogas residue goes back on the spot field, throws so as to significantly save biogas engineering facility Enter, reduce biogas engineering operation cost, improve biogas production efficiency.
In this set large-sized biogas engineering system, the vehicle-mounted methane purification of its core technology, liquefaction pot-type equipment need Configuration deep freeze refrigeration plant and its heat-insulation and heat-preservation equipment volume is big, cost is high.So needing a kind of vehicle-mounted methane compression badly separates liquefaction Can packing machine come solve complete the purification of biogas, separation, purification, it is canned on the basis of, realize device miniaturization, low cost simultaneously Technical problem that can be vehicle-mounted.
The content of the invention
It is an object of the invention to provide a kind of vehicle-mounted methane compression separates liquefaction can packing machine to solve complete biogas Purification, separation, purification, it is canned on the basis of, realize device miniaturization and can be vehicle-mounted technical problem.
The present invention adopts following technical scheme：
A kind of vehicle-mounted methane compression separates liquefaction can packing machine, including：Carrying cart (1), can packing machine unit (10), the tank Installation unit (10) is on the platform of the carrying cart (1), it is characterised in that：The can packing machine unit (10) is including desulfurization Tower (3), washing decarbonizing tank (4), drain sump (5), biogas liquefied tank (6), are followed in series to form by pipeline；
The can packing machine unit (10) also includes compressor (2), and the compressor (2) is divided into two groups, and first group is connected on Between the desulfurizing tower (3), washing decarbonizing tank (4), second group is connected between the drain sump (5), biogas liquefied tank (6).
The compressor (2) is Pyatyi compressor, is first group of compressor after the series connection of one or two three stage compressions, four Pyatyis It is second group of compressor after compression series connection；Desulfurization biogas pressure after described first group of compressor (2) compression Power to 7-8MPa enters washing decarbonizing tank (4)；Dehydration methane gas after described second group of compressor (2) compression Pressure to 25MPa enters the biogas liquefied tank (6).
The desulfurizing tower (3), washing decarbonizing tank (4) are arranged side by side in the carrying cart (1) platform front and are fixed on and prop up On frame, horizontal described biogas liquefied tank (6), the drain sump (5) are respectively two and are set in parallel in the delivery in front and back Car (1) rear, two drain sumps (5) are suspended from the biogas liquefied tank (6) and are arranged above by support (100), described Compressor (2) is placed between the desulfurizing tower (3) and biogas liquefied tank (6)；
The external biogas source of air inlet (31) on desulfurizing tower (3) top, its underpart gas outlet (32) are by desulfurization biogas Pipeline (8) connects the inlet end of first group of compressor (2), the outlet side of first group of compressor (2) and the washing The air inlet (44) of decarbonizing tank (4) bottom is connected by first group of compressed gas pipeline one (91), washing decarbonizing tank (4) top Air vent (41) is connected in parallel the dehydration canister incoming gas of two described drain sump (5) one end by first group of compressed gas pipeline two (92) Mouth (52), after drain sump gas outlet (51) parallel connection of two drain sump (5) other ends first group of compressed gas pipeline three is passed through (93) inlet end of second group of compressor (2) is connected, the outlet side of second group of compressor (2) passes through second group of compression Feed channel (101) connects the high pressure gas pipeline entrance (65) at the top of the biogas liquefied tank (6).
The desulfurizing tower (3) is vertical closed tank, built-in several diaphragm plates, and adjacent diaphragm plate is crisscross arranged breach, And slightly have a down dip to breach end, filling desulfurizing agent in its tower body, and be provided with air inlet (31), gas outlet (32), charging aperture (33), Discharging opening (34), the external biogas source of air inlet (31) of the desulfurizing tower, the gas outlet (32) connects first group of compression Machine (2) inlet end；The air inlet (31), gas outlet (32) form for long tube grafting, and the charging aperture (33) is positioned at tank body top Portion is vertically arranged, and horizontal grafting and connects the air inlet (31) on the wall of charging aperture (33) side, discharging opening (34) position It is vertically arranged in tank base, horizontal grafting on the wall of discharging opening (34) side connects the gas outlet (32).
Washing decarbonizing tank (4) is vertical partition formula water washing tank, and it is closed tank, and inner vertical is provided with midfeather (49) former and later two halfth areas will be divided in tank body, midfeather (49) side is connected solid with washing decarbonizing tank (4) inwall Surely shut, opposite side leaves gap (410) with washing decarbonizing tank (4) inwall；Along upper in washing decarbonizing tank (4) tank body Lower direction is horizontally disposed multiple washings decarbonizing tank diaphragm plate (48), and region separates two halves by midfeather between adjacent diaphragm plate, Each described washing decarbonizing tank diaphragm plate (48) is provided with opening, the neighbouring washing decarbonizing tank diaphragm plate opening point Before and after halfth area is placed in, and the opening is arranged at the midfeather (49) and shuts end；Washing decarbonizing tank (4) bottom is provided with Washing decarbonizing tank leakage fluid dram (42), top is provided with washing decarbonizing tank air vent (41), and wall top in side is provided with washing decarbonizing tank Inlet (43), described to wash the external pure water water source of decarbonizing tank inlet (43), tank wall lower section is provided with washing decarburization Canister incoming gas mouth (44), washing decarbonizing tank air inlet (44) is the long tube for being horizontally inserted tank body, the inner end head closing of its insertion, Ventilating microhole (47), and compressor (2) outlet side described in external first group are provided with inserting paragraph long tube.
The drain sump (5) is horizontal closed tank, and its internal longitudinal direction is vertically arranged with vertical clapboard (58) by tank body It is divided into former and later two halfth areas, vertical clapboard (58) top is connected with inner tank wall, and gap is left in bottom with inner tank wall, Filling dehydrated adsorbent and it is parallel to each other in left-right direction and is vertically arranged with multiple drain sump tabulas inside the drain sump (5) Plate (57), region separates two halves by midfeather between adjacent diaphragm plate, and each described drain sump diaphragm plate (57) top is respectively provided with There is an opening, the opening of the adjacent drain sump diaphragm plate (57) is placed in former and later two halfth areas, drain sump (5) the left and right two ends Drain sump air inlet (52), drain sump gas outlet (51) are respectively arranged with, the drain sump air inlet (52) connects the washing Decarbonizing tank air vent (41), the drain sump gas outlet (51) connects second group of compressor inlet end of the compressor (2), top Portion is provided with drain sump charging aperture (53), bottom and is provided with drain sump discharging opening (54)；The drain sump (5) is in parallel two It is used alternatingly, the drain sump charging aperture (53), drain sump discharging is provided between the adjacent drain sump diaphragm plate (57) Mouthful (54), the adjacent drain sump charging aperture (53) is placed in and the drain sump top and separates before and after halfth area by diaphragm plate (58) Laid out in parallel.
The biogas liquefied tank (6) is vertical closed tank, and tank body inner bottom part is filled with liquefaction auxiliary agent (67), the biogas Liquefied pot (6) bottom is provided with liquid material and imports and exports (64), and top is provided with high pressure gas pipeline entrance (65), the high pressure gas pipeline Entrance (65) is built-in high pressure gas pipeline, one section of single tube and divided by its bottom that the high pressure gas pipeline is arranged by top vertical Go out the high pressure gas pipeline arm (651) that left and right two-way is vertically arranged to constitute, the bottom of the high pressure gas pipeline arm is immersed in described Liquefy in auxiliary agent (67) and connect horizontal high pressure appendix arm (652) of horizontally set, the horizontal high pressure appendix arm (652) high pressure micropore is provided with, the liquid material imports and exports (64) and is vertically arranged liquid in-out expects pipe (641), the turnover liquid material Pipe (641) top is extended down to the top in the biogas liquefied tank (6), and the liquid in-out expects pipe top is provided with high pressure micropore, institute State the outlet side that high pressure gas pipeline entrance (65) connects second group of compressor of the compressor (2), the biogas liquefied tank (6) Top is provided with relief valve, pressure gauge, and the biogas liquefied tank (6) is used alternatingly for two parallel connections, the biogas liquefied tank (6) It is used alternatingly for two parallel connections.
The liquefaction auxiliary agent is five carbon above alkane or alkene liquefaction auxiliary agent, and volume accounts for the molten long-pending 1/5-2/5 of tank body, described Liquefaction auxiliary agent is the one kind in the mixture of 2,2 dimethylpropanes and isomery dodecane or 2- methybutanes and isomery dodecane, 2,2 dimethylpropanes and isomery dodecane ratio of weight and number are 5~10 in described mixture:5~0, in described mixture 2- methybutanes and isomery dodecane ratio of weight and number are 5~10:5~0.
Each step enters as follows, and following steps are carried out at normal temperatures：
Step one：Pending biogas is passed through in desulfurizing tower (3) by air inlet (31), is filled out in the desulfurizing tower (3) The desulfurizing agent for filling carries out reaction absorption desulfurization with pending biogas, and biogas is desulfurized purification；
Step 2：Compressor is discharged and be passed through to biogas after step one desulfurization by the gas outlet (32) of the desulfurizing tower First group of compressor, gas pressure is 8.0MPa after compression, and biogas is pressurized after first group of compression；
Step 3：Biogas after being pressurized in step 2 is passed through into the washing decarburization by washing decarbonizing tank air inlet (44) In tank (4), pure water is passed through by washing decarbonizing tank inlet (43), biogas is with pure water in the washing decarbonizing tank (4) aqueous solution of the carbon dioxide obtained after interior hybrid reaction, with pure water hybrid reaction, by the washing decarbonizing tank discharge opeing Mouth (42) is discharged, and the biogas Jing after decarburization is separated is biological flue gas by washing decarbonizing tank air vent (41) discharge；
Step 4：The biological flue gas discharged after decarburization in step 3 are passed through by the drain sump air inlet (52) described In drain sump (5), adsorption dewatering reaction is carried out with the dehydrated adsorbent of its interior filling, what is obtained after dehydration is dried biological combustion Gas is discharged by the drain sump gas outlet (51)；
Step 5：The biological flue gas that step 4 is discharged further are pressurizeed by second group of compressor of the compressor, Gas pressure is 25MPa after compression, and biological flue gas are pressurizeed after second group of compression；
Step 6：The biological flue gas that are dried after pressurizeing in step 5 are passed through again by the high pressure gas pipeline entrance (65) In the biogas liquefied tank (6), it is dried after biological flue gas are mixed with the auxiliary agent (67) that liquefies, biological flue gas are liquefied storage.
The liquefaction auxiliary agent is five carbon above alkane or alkene liquefaction auxiliary agent, and volume accounts for the molten long-pending 1/5-2/5 of tank body, described Liquefaction auxiliary agent is the one kind in the mixture of 2,2 dimethylpropanes and isomery dodecane or 2- methybutanes and isomery dodecane, The ratio of weight and number of 2,2 dimethylpropanes and isomery dodecane or 2- methybutanes and isomery dodecane mixture is 5~10: 5~0.
Advantages of the present invention is as follows：
1. this vehicle-mounted methane compression separates liquefaction can packing machine, realizes the purification of biogas, separation, purification, canned, and adopts Method with compressing and liquefying, eliminates configuration deep freeze refrigeration plant and its heat-insulation and heat-preservation equipment.Realize equipment miniaturization and can It is vehicle-mounted.The advantages of possessing flexible performance capacity, small volume, low cost, Highgrade integration, efficiency high.
2. using liquefaction auxiliary agent method, realize that biological flue gas, carbon dioxide compression liquefaction will be purified under normal temperature condition, realize Biological flue gas liquefaction is canned, and it is carbon dioxide-water and methane-liquefaction agent mixture to obtain liquiefied product, bigger than cryogenic liquefying Amplitude reduces energy consumption.
3. extract through surge tank, what is finally utilized remains as pure carbon dioxide and methane gas.Buffered tank subtracts Press after extracting, water, liquefaction auxiliary agent are still liquid, and repeat recycling.And methane, the carbon dioxide after surge tank extraction, The application requirement of its higher standard is not affected, such as automobile-used biological flue gas are required.
4. equipment is moved with car, is run on the spot, and processing biogas can be on wide field, any place fortune that can be reached OK so that automobile-used biological flue gas industry development, it is to avoid the serial difficult problem such as agricultural straw refuse is collected, transport, processing, do not transported The restriction of defeated radius, the greatly utilization scope of extension stalk.
5. vehicle-mounted type equipment, it is to avoid the huge freight volume of raw material input and waste residue output, only need to transport finished product, conevying efficiency It is high；Low so as to avoid straw transportation efficiency, collection difficulty is big to wait a serial difficult problem, considerably reduces cost of transportation, improves Industrial benefit.
6. transport for long-distance raw material and waste residue are avoided, fleet's input can be saved, reduce the freight cost.These reduces costs it is excellent Point so that biogas poor benefit industry becomes the viable industries that can be got a profit.
Description of the drawings：
Fig. 1 is the overall flow schematic diagram of the present invention；
Fig. 2 is the overlooking the structure diagram of the present invention；
Fig. 3 is the main structure diagram of the present invention；
Fig. 4 is inventive desulfurization tower internal structure schematic diagram；
Fig. 5 sets up schematic diagram for decarburization water washing tank internal junction of the present invention；
Fig. 6 is decarburization water washing tank of the present invention inside diaphragm plate opening arrangement schematic diagram；
Fig. 7 is that schematic diagram is arranged in decarburization water washing tank of the present invention inside based on the adjacent diaphragm plate openings of Fig. 5；
Fig. 8 is drain sump internal structure schematic diagram of the present invention；
Fig. 9 is that drain sump diaphragm plate opening of the present invention arranges schematic diagram；
Figure 10 is that schematic diagram is arranged in drain sump of the present invention inside based on the adjacent drain sump diaphragm plate openings of Fig. 8；
Figure 11 is the vertical biogas liquefied tank internal structure schematic diagram of the present invention；
Figure 12 is the horizontal biogas liquefied tank internal structure schematic diagram of the present invention；
Figure 13 is the surge tank internal structure schematic diagram of the present invention；
Specific embodiment
The specific embodiment of the present invention is described further below in conjunction with the accompanying drawings.
Following examples are only to illustrate example of the present invention for clear, and not to the limit of embodiments of the present invention It is fixed.For those of ordinary skill in the field, other multi-forms can also be made on the basis of the following description Change changes, and these belong to the protection of the spiritual obvious change drawn of the invention or variation still in the present invention Among scope.
A kind of vehicle-mounted methane compression separates liquefaction can packing machine, including：Carrying cart 1, can packing machine unit 10, the can packing machine Unit 10 is arranged on the platform of the carrying cart 1, and the can packing machine unit 10 includes desulfurizing tower 3, washing decarbonizing tank 4, dehydration Tank 5, biogas liquefied tank 6, are followed in series to form by pipeline；
The can packing machine unit 10 also includes compressor 2, and 2 points of the compressor is two groups, and first group is connected on described taking off Between sulfur tower 3, washing decarbonizing tank 4, second group is connected between the drain sump 5, biogas liquefied tank 6.
The compressor 2 is Pyatyi compressor, is first group of compressor after the series connection of one or two three stage compressions, four Pyatyi pressures It is second group of compressor after contracting series connection；Desulfurization biogas pressure after described first group of compressor 2 compression is extremely 7-8MPa enters the washing decarbonizing tank 4；Dehydration methane gas pressure after described second group of compressor 2 compression is extremely 25MPa enters the biogas liquefied tank 6.
The desulfurizing tower 3, washing decarbonizing tank 4 are arranged side by side in the platform of the carrying cart 1 front and are fixed on support, crouch The described biogas liquefied tank 6 of formula, the drain sump 5 are respectively two and are set in parallel in the rear of the carrying cart 1 in front and back, two The drain sump 5 is suspended from the biogas liquefied tank 6 and is arranged above by support 100, and the compressor 2 is placed in the desulfurizing tower Between 3 and biogas liquefied tank 6；
The external biogas source of air inlet 31 on the top of the desulfurizing tower 3, its underpart gas outlet 32 is connected by desulfurization biogas pipeline 8 Connect the inlet end of first group of compressor 2, the outlet side of first group of compressor 2 and washing decarbonizing tank 4 bottom Air inlet 44 is connected by first group of compressed gas pipeline 1, and the top vent 41 of the washing decarbonizing tank 4 passes through first group of pressure Contracting feed channel 2 92 is connected in parallel the drain sump air inlet 52 of two one end of the drain sump 5, two other ends of the drain sump 5 The parallel connection of drain sump gas outlet 51 after connect the inlet end of second group of compressor 2 by first group of compressed gas pipeline 3 93, The outlet side of second group of compressor 2 connects the high pressure at the top of the biogas liquefied tank 6 by second group of compressed gas pipeline 101 Gas transmission tube inlet 65.
The desulfurizing tower 3 is vertical closed tank, and built-in several diaphragm plates, adjacent diaphragm plate is crisscross arranged breach, and Slightly have a down dip to breach end, filling desulfurizing agent in its tower body, and it is provided with air inlet 31, gas outlet 32, charging aperture 33, discharging opening 34, the external biogas source of air inlet 31 of the desulfurizing tower, the gas outlet 32 connects first group of compressor 2 inlet end；Institute State air inlet 31, gas outlet 32 to form for long tube grafting, the charging aperture 33 is arranged positioned at tank body top vertical, the charging aperture Horizontal grafting and the air inlet 31 is connected on 33 side walls, the discharging opening 34 is vertically arranged positioned at tank base, the discharging Horizontal grafting on 34 side walls of mouth connects the gas outlet 32.
The washing decarbonizing tank 4 is vertical partition formula water washing tank, and it is closed tank, and inner vertical is provided with midfeather 49 Former and later two halfth areas will be divided in tank body, the side of the midfeather 49 is connected with the washing inwall of decarbonizing tank 4 and shuts, separately Gap 410 is left with the washing inwall of decarbonizing tank 4 in side；It is horizontally disposed with along the vertical direction in the washing tank body of decarbonizing tank 4 There are multiple washing decarbonizing tank diaphragm plates 48, region separates two halves by midfeather between adjacent diaphragm plate, each described washing decarburization Tank diaphragm plate 48 is provided with opening, and the neighbouring washing decarbonizing tank diaphragm plate opening is placed in before and after halfth area, and institute State opening and be arranged at the midfeather 49 and shut end；Washing decarbonizing tank 4 bottom is provided with washing decarbonizing tank leakage fluid dram 42, top Portion is provided with washing decarbonizing tank air vent 41, and wall top in side is provided with washing decarbonizing tank inlet 43, and the washing decarbonizing tank enters The external pure water water source of liquid mouth 43, tank wall lower section is provided with washing decarbonizing tank air inlet 44, the washing decarbonizing tank air inlet Mouthfuls 44 is the long tube for being horizontally inserted tank body, the inner end head closing of its insertion, is provided with ventilating microhole 47 on inserting paragraph long tube, and outward Connect the outlet side of compressor 2 described in first group.
The drain sump 5 is horizontal closed tank, and its internal longitudinal direction is vertically arranged with vertical clapboard 58 and will be divided in tank body Former and later two halfth areas, the top of the vertical clapboard 58 is connected with inner tank wall, and gap is left in bottom with inner tank wall, described de- The inside of water pot 5 filling dehydrated adsorbent is simultaneously parallel to each other in left-right direction and is vertically arranged with multiple drain sump diaphragm plates 57, phase Region separates two halves by midfeather between adjacent diaphragm plate, and each top of the drain sump diaphragm plate 57 is provided with opening, adjacent The opening of the drain sump diaphragm plate 57 is placed in former and later two halfth areas, and the two ends of the drain sump 5 or so are respectively arranged with dehydration Canister incoming gas mouth 52, drain sump gas outlet 51, the drain sump air inlet 52 connects the washing decarbonizing tank air vent 41, described de- Water pot gas outlet 51 connects second group of compressor inlet end of the compressor 2, and top is provided with drain sump charging aperture 53, bottom It is provided with drain sump discharging opening 54；The drain sump 5 is used alternatingly in parallel two, the adjacent drain sump diaphragm plate 57 it Between be provided with the drain sump charging aperture 53, drain sump discharging opening 54, the adjacent drain sump charging aperture 53 is placed in described Drain sump top simultaneously separates before and after halfth area laid out in parallel by diaphragm plate 58.
The biogas liquefied tank 6 is vertical closed tank, and tank body inner bottom part is described biogas liquefied filled with liquefaction auxiliary agent 67 The bottom of tank 6 is provided with liquid material and imports and exports 64, and top is provided with high pressure gas pipeline entrance 65, and the high pressure gas pipeline entrance 65 is interior The high pressure gas pipeline put, one section of single tube that the high pressure gas pipeline is arranged by top vertical and separates left and right two-way and erects by its bottom The straight high pressure gas pipeline arm 651 for arranging is constituted, and the bottom of the high pressure gas pipeline arm is immersed in the liquefaction auxiliary agent 67 simultaneously The horizontal high pressure appendix arm 652 of connection horizontally set, is provided with high pressure micro- on the horizontal high pressure appendix arm 652 Hole, the liquid material imports and exports 64 and is vertically arranged liquid in-out expects pipe 641, and the top of liquid in-out expects pipe 641 is extended down to the methane liquid Change the top in tank 6, the liquid in-out expects pipe top is provided with high pressure micropore, and the high pressure gas pipeline entrance 65 connects the pressure The outlet side of second group of compressor of contracting machine 2, the top of the biogas liquefied tank 6 is provided with relief valve, pressure gauge, the methane liquid Change tank 6 to be used alternatingly for two parallel connections, the biogas liquefied tank 6 is used alternatingly for two parallel connections.
The liquefaction auxiliary agent is five carbon above alkane or alkene liquefaction auxiliary agent, and volume accounts for the molten long-pending 1/5-2/5 of tank body, described Liquefaction auxiliary agent is the one kind in the mixture of 2,2 dimethylpropanes and isomery dodecane or 2- methybutanes and isomery dodecane, 2,2 dimethylpropanes and isomery dodecane ratio of weight and number are 5~10 in described mixture:5~0, in described mixture 2- methybutanes and isomery dodecane ratio of weight and number are 5~10:5~0.
Each step enters as follows, and following steps are carried out at normal temperatures：
Step one：Pending biogas is passed through in desulfurizing tower 3 by air inlet 31, filling is de- in the desulfurizing tower 3 Sulfur agent carries out reaction absorption desulfurization with pending biogas, and biogas is desulfurized purification；
Step 2：Compressor is discharged and be passed through to biogas after step one desulfurization by the gas outlet 32 of the desulfurizing tower First group of compressor, gas pressure is 8.0MPa after compression, and biogas is pressurized after first group of compression；
Step 3：Biogas after being pressurized in step 2 is passed through into the washing decarbonizing tank by washing decarbonizing tank air inlet 44 In 4, pure water is passed through by the washing decarbonizing tank inlet 43, biogas mixes with pure water in the washing decarbonizing tank 4 The aqueous solution of the carbon dioxide obtained after reaction, with pure water hybrid reaction, is discharged by the washing decarbonizing tank leakage fluid dram 42, Biogas Jing after decarburization is separated is that biological flue gas are discharged by washing decarbonizing tank air vent 41；
Step 4：The biological flue gas discharged after decarburization in step 3 are passed through by the drain sump air inlet 52 described de- In water pot 5, adsorption dewatering reaction is carried out with the dehydrated adsorbent of its interior filling, the biological flue gas that are dried obtained after dehydration lead to Cross the drain sump gas outlet 51 to discharge；
Step 5：The biological flue gas that step 4 is discharged further are pressurizeed by second group of compressor of the compressor, Gas pressure is 25MPa after compression, and biological flue gas are pressurizeed after second group of compression；
Step 6：The biological flue gas that are dried after pressurizeing in step 5 are passed through into institute by the high pressure gas pipeline entrance 65 again State in biogas liquefied tank 6, be dried after biological flue gas are mixed with liquefaction auxiliary agent 67, biological flue gas are liquefied storage.
The liquefaction auxiliary agent is five carbon above alkane or alkene liquefaction auxiliary agent, and volume accounts for the molten long-pending 1/5-2/5 of tank body, described Liquefaction auxiliary agent is the one kind in the mixture of 2,2 dimethylpropanes and isomery dodecane or 2- methybutanes and isomery dodecane, The ratio of weight and number of 2,2 dimethylpropanes and isomery dodecane or 2- methybutanes and isomery dodecane mixture is 5~10: 5~0.
There is a kind of biogas liquefied tank in bedroom as shown in figure 12, tank body inner bottom part is filled with liquefaction auxiliary agent, the methane liquid Change pot bottom and be provided with liquid material import and export, high pressure gas pipeline entrance, the liquid material is imported and exported and is arranged on the natural pond for vertically built-in Trachea in gas liquefaction tank, its top extends to the biogas liquefied tank top and high pressure micropore is provided with body, described High pressure gas pipeline entrance includes vertical pipeline section and horizontal pipeline section, and the vertical pipeline section inserts the biogas liquefied tank, and Its top seal, the inserting paragraph level of the vertical pipeline section connects two horizontal pipeline sections arranged in parallel, the water Flat tube section is immersed in the liquefaction auxiliary agent, and its inner end closing is simultaneously provided with high pressure micropore, the high pressure gas pipeline on its body Entrance connects the outlet side of second group of compression of the compressor；The biogas liquefied tank or so two ends are provided with relief valve, top Portion is provided with pressure gauge, and the biogas liquefied tank is used alternatingly for two parallel connections.
Its technical scheme and operation principle：
The technical scheme is that：Method is compressed and liquefied as core with auxiliary agent, integrated absorption desulfurization, washing decarburization, absorption Dehydration and the technology such as high-pressure liquefaction is canned, set up vehicle apparatus, realize equipment mobile operational process in integrated networking biogas engineering, By marsh gas purifying, separation, liquefaction, canned.
1. technology is compressed and liquefied using auxiliary agent, under normal temperature condition, by the effect of biogas liquefied auxiliary agent, realize biogas slurry pressure Contracting liquefaction is canned.
2. integrated adsorbent doctor treatment, washing carbon rejection processes, adsorbent evaporation, are processed biogas, realize that biogas is net Change and separate.
3. by corresponding Marsh gas compression and pre-processing device general assembly in vehicular platform, reach equipment vehicle-mountedization and move mesh with car , realize marsh gas purifying, separation, liquefaction, canned mobile operational process.
Described " auxiliary agent compresses and liquefies method ", its technological process is as shown in Figure 1.Its principle is under normal temperature condition, to purify natural pond Gas methane can not possibly liquefy under any pressure.But in the presence of liquefaction auxiliary agent, by pressurization, can jointly liquefy with auxiliary agent. Suitable liquefaction auxiliary agent is selected, jointly the liquid of liquefaction, at reduced pressure conditions, methane gas are separated with liquefaction auxiliary agent, and methane is rapid Switch to gas, and the auxiliary agent that liquefies is still liquid under less pressure even normal pressure.
In process above flow process, the appointed condition and technical parameter that links are adopted is as described below：
The first step：Absorption desulfurization
Including absorption desulfurization and desulfurizer regeneration.Desulfurizing agent is filled using desulfurizing tower, the equipment and thing of desulfurization link is formed Matter basis.To adapt to vehicle-mountedization of equipment, this project is shown in Fig. 3 using common desulfurizing tower form, by the built-in several sides of digester Leaving certain gaps uncovered by the economic plan and the diaphragm plate having a down dip to notch side.The use process of desulfurizing tower：The discharging opening of bottom of towe is closed, charging aperture is opened, Desulfurizing agent is loaded from charging aperture, under gravity, sorbent particle successively slides downwards from top layer next door, successively fills up tower It is interior, close charging aperture.Then be input into biogas from the air inlet of charging aperture side, biogas passes through from top layer desulfurizing agent, and on to Under, successively by desulfurizing agent, finally exporting from bottom of towe gas outlet, the sulfur dioxide in biogas is desulfurized agent absorption.Desulfurizing agent makes After with a period of time, need to change in time.Change the process of desulfurizing agent：Bottom of towe blind plate is opened, desulfurizing agent is automatic under gravity Glide, skid off from discharging opening.The desulfurizing agent for skidding off is through dry in the sun reproducible utilization.Desulfurizing agent is TFC ferric oxide desulfurizers.Desulfurization Agent regeneration is completed using dry in the sun method, only needs the high temperature resistant airing field of 50 ㎡.It is total that high temperature resistant airing field should be located at company The open ventilation ground in portion.Biogas by gasing pump be input into vehicle-mounted methane compress and liquefy can packing machine desulfurizing tower air inlet continually Ground injection, biogas desulfurization after desulfurizing tower is exported from gas outlet, through first group of compressor compresses to 8MPa, and from water elution Canister air inlet is input into.
Second step：Washing decarburization
Decarburization water washing tank is GB713 steel plate of pressure vessel materials, and proof pressure is 12MPa.Washing decarbonizing process is in decarburization Complete in water washing tank.Including adding water, be pressurized, decarburization, it is canned, extract, washing, the process such as reclaim.
Add water, step is completed at normal temperatures and pressures, clear water is injected by water washing tank by high pressure water-injection pump, until water washing tank holds Product 1/2, stays 1/2 space to continue pressurized water injection.The pure pure water of water quality requirement, it is to avoid contamination precipitation, causes equipment pipeline Blocking.
Supercharging, closes all valves, continues to inject water in tank by high pressure water-injection pump, until tank internal water pressure rises to 8.0MPa, water accounts for the volume of tank body 9/10.1/10 space is left as gas collection area.
Decarburization, will be pressed into water washing tank by the desulfurization biogas of the first of the compressor group of compressor boost to 8.0MPa. Desulfurization biogas sprays from after air inlet press-in decarburization water washing tank from bottom ventilation pipe micropore, mixes with water in tank and along horizontal stroke Dividing plate is by the way that (as seen in figs. 5-6) midfeather, diaphragm plate successively rise.
In uphill process, biogas is mixed to form solution-airmixture with water, and has enough strokes to make carbon dioxide and water Interact, carbon dioxide is dissolved in water.When gas-liquid mixture rises to tank deck, carbon dioxide is filled under elevated pressure conditions by water Point absorb and liquefy, biogas is purified as main components methane, becomes decarburization biogas --- the methane containing a small amount of carbon dioxide.
Methane gas after water washing tank top decarburization, by top gas outlet, pipeline second group of compressor of compressor is entered Super charge mouth.
It is canned, it is after high-pressure carbon dioxide water mixed solution is separated from methane gas, from washing pot bottom air relief valve to be passed through Door flows out, and is potted in pressurized tank.The pressurized tank for taking up high-pressure carbon dioxide aqueous solution is the pressure vessel being separately configured, by Steel plate of pressure vessel is made, and proof pressure is 10MPa.
Extract, be potted in the carbon dioxide water mixed solution in pressurized tank due to moisture content, can be used for the gas of polyhouse-based agriculture Body fertilizer.Canned carbon dioxide is connected by pipeline with the surge tank being reserved in agricultural greenhouse, valve is opened, by titanium dioxide Carbon liquid body is discharged in (as shown in figure 11) surge tank, due in surge tank liquid pressure-reducing to normal pressure, carbon dioxide is separated from water, Carbon dioxide is directly ejected into agricultural greenhouse, increases gas concentration lwevel in booth, promotes crop yield.
After wash water recovery carbon dioxide is separated from water, aqueous water is stayed in surge tank, recyclable recycling, also can be discharged In farmland.
3rd step：Adsorption dewatering
Including the process such as adsorption dewatering and dehydrant regeneration.
Adsorption dewatering, the adsorbent for biogas dehydration is mainly the materials such as silica gel, aluminium oxide or magnesium oxide.Corollary equipment For filling dehydrated adsorbent in drain sump (as Figure 7-9), tank, tank body is using the manufacture of GB713 steel plate of pressure vessel, tolerance pressure Power 12MPa, operating pressure 8MPa.Drain sump need to be equipped with two sets, to be used alternatingly.It is wherein a set of for being dehydrated when, it is another set of For dehydrant regeneration.Dehydrant regenerates, and using the high pressure dry gas after follow-up eliminating water the moisture of dehydrant is removed.By subsequent pressurization Dry gas to 25MPa separates 5% or so flow from pipeline, in being passed directly into the drain sump that (Fig. 2) stops dewatering work, In the presence of high pressure dry gas, the moisture removal for rapidly absorbing dehydrant, so as to dehydrant be dried.After dehydrant is dried, close Stopped pipe road, drain sump is stand-by.After completing dehydrant drying, biogas pressure reduces and carries moisture, is directly passed through from pipeline (Fig. 2) Biogas before decarburization, into decarbonizing tank decarburization link is continued.
The dehydrant adds and fills up drain sump from charging aperture, each charging aperture one diaphragm plate insulating space of correspondence, The dehydrant in each space is added from corresponding charging aperture.Decarburization biogas is opened from after air inlet press-in drain sump along diaphragm plate Mouth is passed sequentially through, and forms sufficiently long path, and is fully contacted with dehydrant during, dehydrated dose of absorption of moisture, is produced Purification dry gas.
4th step：Auxiliary agent liquefies
Including processes such as injection liquefaction auxiliary agent, the supercharging of purification biological flue gas and biological flue gas liquefaction.
Liquefaction auxiliary agent adopts the neat liquid or mixing liquid of 2,2- methylpropanes or 2- methybutanes and isomery dodecane.2, 2- methylpropanes or 2- methybutanes and isomery dodecane ratio are 5-10：5-0.Supporting two sets of biogas liquefied tanks are needed, in case handing over For using.The liquefied pot is cylinder, is made using GB713 steel plate of pressure vessel, and proof pressure is 30MPa, and operating pressure is 25MPa.Tank base is provided with the pipeline of countless microscopic pinholes, for the dry biogas being passed through after being pressurized.
Injection liquefaction auxiliary agent injects selected liquefaction auxiliary agent in liquefied pot at ambient pressure, until accounting for the molten product 1/5 of tank body, liquid Face till the pipeline for not being covered with minute aperture installed in pot bottom terminates.
Purification biological flue gas supercharging need to be pressurized to 25MPa through second group of compression.The purifying biogas of 25MPa are increased to, when de- When water pot needs to remove moisture, 5% flow is separated for drain sump and be dehydrated (Fig. 2), remaining 95% supercharging purification biological flue gas Input liquefied pot.When drain sump need not be dehydrated, then all superchargings are purified into biological flue gas input liquefied pot.
Biological flue gas liquefy and are passed through the purification biological flue gas Jing after second group of compression supercharging one of two liquefied pots (Fig. 2) The pipeline for being covered with microscopic pinholes, high pressure purification biological flue gas by minute aperture injection liquefaction auxiliary agent, while startup and liquefied pot Connected water injecting pump, pot liquid is extracted out and is injected further through high pressure micropore, forms backflow, promotes biological flue gas with liquefaction auxiliary agent Solution-airmixture is formed, and as tank body pressure is continuously increased, solution-airmixture liquefies completely.After in-tank mixing thing liquid, Pressure in tank body falls after rise.When the liquefied pot pressure stability is in 25MPa, pipeline automatically cuts off, and is switched to another liquefaction In tank.So alternately switch.
5th step：Canned extraction
Including processes such as liquefaction biological flue gas canned, tanked liquefied biological flue gas are extracted, liquefaction auxiliary agent recovery.
Liquefying, biological flue gas are canned need to be equipped with special high-pressure storage tank, made using GB713 steel plate of pressure vessel, proof pressure 30MPa, operating pressure 25MPa.When in biological flue gas liquefied pot with liquefaction biological flue gas injection, pressure stability in 25MPa, By pressure piping connect biogas storage tank, open valve, will liquefaction biological flue gas injection air accumulator, the pressure in air accumulator with Liquefied pot is balanced, and reaches 25MPa.
Tanked liquefied biological flue gas extract the surge tank that need to be equipped with as carbon dioxide extraction, are held using GB713 pressure Device steel plate is made, and comprcssive strength is 10MPa.When needing to use tanked liquefied biological flue gas, by the biological combustion of pressure piping connection Gas storage tank and surge tank, open valve, and after high pressure biological flue gas are reduced pressure surge tank is passed through.When liquefaction biological flue gas are passed through buffering After in tank, pressure quick release, biological flue gas are separated with liquefaction auxiliary agent.Liquefaction auxiliary agent is liquid, sinks and be gathered in surge tank Bottom, biological flue gas are gas, under the driving of pressure, are input into burner, for users to use.
Liquefaction auxiliary agent is reclaimed as the biological flue gas that liquefy in storage tank are constantly exported, and part liquefaction auxiliary agent is gathered in buffering Tank, another part is then rested in storage tank as pressure of storage tank is reduced.After the biological flue gas of storage tank are using finishing, by pressure Pipe is transferred to buffering pot bottom leakage fluid dram from buffering canister incoming gas mouth, opens the valve of buffering pot bottom, and the liquefaction of surge tank is stored up Collection is back to storage tank, and liquefaction auxiliary agent is collected into utilization to be recycled to storage tank.
Described liquefaction auxiliary agent has varied, and the present invention refers mainly to alkanes, olefines.Some methane/auxiliary agents need to be compared with Could liquefy under conditions of little ratio duty pressure is larger, then the desirable pressure under higher ratio is less can also liquefy for some.This The auxiliary agent that too big pressure also can liquefy is not required in the case that invention preferably those ratios are higher.These auxiliary agents are mainly 2,2 2 Methylpropane or 2- methybutanes and isomery dodecane, its ratio (2,2 dimethylpropanes or 2- methybutanes:Isomery dodecane) For 5~10:5~0.The situation that purification biological flue gas-methane is accounted for below 60% to 80% in the dissolving molar fraction of these auxiliary agents Under, normal temperature condition pressurization only needs below 25MPa just can liquefy.And 25MPa is the conventional pressure of existing compressed natural gas.
Described liquefaction auxiliary agent, some are gas with biological flue gas cotransformation in the case where condition of normal pressure is decompressed to, and some are then It is still liquid, and separates with biogas.It is still the auxiliary agent of liquid under preferably reduced pressure of the invention, is beneficial to auxiliary agent and reclaims repetition profit With, the biological flue gas loss of auxiliary agent zero in use of liquefying is accomplished as far as possible, liquefaction biological flue gas business efficiency is improved, save Auxiliary agent production cost.
The biological flue gas liquefaction storage tank, liquefied pot tolerance pressure 30MPa, operating pressure 25MPa is held using GB713 pressure Device steel plate is manufactured.Biological flue gas after purification, by the safe check valves of high pressure gas pipeline high pressure micropore exhaust stack is pressed into, and is turned to Countless Tiny pores, injection liquefaction auxiliary agent, while extracted out liquid by high pressure water-injection pump injecting further through high pressure micropore, are formed back Stream, promotes biological flue gas highly to mix with liquefaction auxiliary agent, and then in the case where high pressure is acted on, is dissolved in liquefaction auxiliary agent, and with the auxiliary agent that liquefies Common liquefaction.
The carrying cart (1) (shown in 1 of Fig. 2) adopt the glorious single lesser calorie of five Pedicellus et Pericarpium Trapaes, vehicle body length 4560mm, wide 1610mm, High 1870mm.2710 × 1520 × 325mm of container sizes.
Described four or Pyatyi compressor (2) be the three strongest ones Cassinis VW-0.63/250 compressions for originating from Zi Gong for core Machine.
Described vehicle-mounted methane compresses and liquefies can packing machine, is that above equipment is needed into integrated installation in container together with compressor On platform, machine made by after assembling is integrated with the function such as biogas collection, purification, compression, liquefaction, canned, referred to as biogas collection Liquefaction canning cart, as shown in Figure 2.
Its meaning of the surge tank is as follows, it is biogas liquefied after, using meeting the compressed natural gas of GB17258-2011 standards Steel cylinder canning and storage, its tolerance pressure 30MPa, operating pressure 20MPa.Because the biological flue gas of auxiliary agent liquefaction are not pure methane Gas, it is impossible to utilization of directly reducing pressure as compressed natural gas, it is necessary to by surge tank, liquefaction auxiliary agent is separated with biological flue gas, Biological flue gas are converted into gas for using, and liquefaction auxiliary agent repeats recovery and uses.
Surge tank is also used for carbon dioxide extraction for biological flue gas extraction, tolerance pressure 2MPa, operating pressure 0.1MPa, Manufactured using corrosion resistant plate, be designed as cylinder, cylinder two ends sphere end socket, high 80cm, diameter 36cm, as shown in figure 12, shape State is similar to liquefied gas bottle, is designed as vertical.Tank upper and lower ends are relief valve.Upper valve controls inlet and gas outlet simultaneously, Inlet be extended with into tank a tube for transfusion be passed directly into it is tank bottoms.Lower valve is used to discharge the liquefaction auxiliary agent for being collected at bottom of bottle.
The desulfurization tank and its structure of the present invention is conventional structure.
Embodiment：
By taking Pyatyi compressor bank as an example, the workflow of the Marsh gas compression liquefaction can packing machine is shown in as follows Fig. 1：
1st, unit is moved to the biogas centrostigma in integrated network type biogas engineering with car car load, can everywhere dispose machine Group, adjusts attitude, it is necessary to which adjusting apparatus are horizontal attitude, is beneficial to machine equilbrium running and liquefied pot liquid is discharged.
2nd, started with vehicle motor group by external power supply, produce power, driving means.
3rd, preliminary desulfurization biogas is input into the desulfurizing tower air inlet source that vehicle-mounted methane compresses and liquefies can packing machine by gasing pump Source constantly infuses, and further absorption desulfurization is exported biogas from gas outlet after desulfurizing tower, is compressed to through one, two, three 8MPa, and from the air inlet input of washing decarbonizing tank.
4th, after input washing decarbonizing tank, from water washing tank bottom, air inlet pipe micropore is ejected biogas, and in water washing tank dividing plate Wriggle and detour upwards, in the process, carbon dioxide is dissolved in water absorption, and methane gas are discharged from tank top gas outlet, and are entered Drain sump air inlet.
Washing decarbonizing tank bottom is connected with carbon dioxide sub-packing pot, and the gas concentration lwevel washed in decarbonizing tank reaches necessarily After degree, carbon dioxide subpackage tank valve is opened, after canned full carbon dioxide to be packed, close valve and be switched to another point In tinning.The carbon dioxide aqueous mixtures of liquefaction are reclaimed for polyhouse-based agriculture gaseous fertilizer.
5th, the purification biological flue gas main component after decarburization is methane gas, from after the input of drain sump air inlet, in tank body Dividing plate detour, and be fully contacted with dehydrated adsorbent, after dehydrated dose of absorption of moisture, from air vent output.
6th, to be dried biological flue gas, Jing after second group of compression, pressure reaches 25MPa to the methane gas after being dehydrated, and is input into dress There is the liquefied pot of the liquefaction auxiliary agent of 1/5 to 2/5 volume, air inlet pipe micropore is ejected from liquefied pot bottom, while by high pressure injection Water pump extracts liquid further through in high pressure micropore injection tank out, forms backflow, promotes biological flue gas to be sufficiently mixed with liquefaction auxiliary agent, And it is converted into mixing liquid as the pressure in liquefied pot gradually rises.
7th, biological flue gas liquefaction sub-packing pot is connected with main tank, opens valve, by main tank liquid input liquefaction sub-packing pot, this When main pressure tank declined, after main pressure tank revert to 25MPa, close subpackage tank valve subpackage after liquefied methane gas use In fuel or motor vehicle fuel.
Thus biogas liquefied canning process is completed, and reclaims the mixed liquor of carbon dioxide-water, biological flue gas-liquefaction auxiliary agent Body product.
5000Nm is processed with day3The vehicle-mounted methane of biogas is compressed and liquefied as a example by can packing machine, produces vehicle fuel 3000Nm daily3, 2151 kilograms are closed, about per hour 184 liters (24 hours 3 classes fall duty), 3954 kilograms of withdrawal liquid carbon dioxide.The biogas Compress and liquefy can packing machine and compress and liquefy system for auxiliary agent.
Liquefaction storage tank, is the independent tank body of liquefied carbon dioxide and methane after methane purification is separated.Wherein carbon dioxide liquid Change storage tank tolerance 10MPa pressure；Methane liquefaction storage tank tolerates 30MPa pressure.High-pressure hose and liquefied pot are adopted when accepting liquid Connection, opens valve, and liquid gas input storage tank when pressure of storage tank is identical with liquefied pot, closes valve.Liquefaction titanium dioxide Carbon and biological flue gas mixing liquid storage reservoir.
Improvement and diminution that the present invention passes through the equipment such as desulfurization, decarburization, dehydration, liquefaction, realize Marsh gas compression liquefied pot The vehicle-mounted pattern of dress；Utilize " auxiliary agent compression method " to realize biogas to separate and liquefy, and produce liquefied carbon dioxide and biological combustion The products such as gas, improve the economic benefit of biogas processing；Using electric drive, the rural power grids area of coverage on wide field is realized, Implement biogas processing.The vehicle-mounted methane that principles above is built compresses and liquefies device, with advantages below：
(1) Marsh gas compression liquefying plant vehicle-mountedization, realizes biogas and processes in field mobile operational process, it is to avoid dispersion The serial difficult problems such as the agriculture and forestry organic waste material on wide farmland, collection, transhipment, processing, are greatly reduced establishment transport column and invest With agriculture and forestry organic waste material cost of transportation.
(2) biogas processes the mode of production of at source treatment in situ, changes high-volume transport waste materials and waste residue Ineffective way, be transformed into transport finished product high effective model, by stalk marsh gas conversion ratio be 420L/kgTS calculate, its into Product cost of transportation only transports the 30.114% of straw, can reduce cost of transportation 70%.
(3), LMG is separated using " auxiliary agent compresses and liquefies method ", in addition to producing the methane (LNG) for accounting for 60%, is returned Receipts account for 40% carbon dioxide.Its product income：Methane gas are 0.6Nm3, by 2.5 yuan/Nm3Wholesale price is calculated, and is 1.5 yuan；Two Carbonoxide is 0.4Nm3, it is 0.3954 yuan by 500 yuan/ton of wholesale prices.Carbon dioxide revenue growth 26.36% is reclaimed, significantly Increase biogas processing economic benefit.
The vehicle-mounted type Marsh gas compression liquefaction can packing machine of the present invention is main advanced as follows：
1st, flexible, light, removable, small volume, low cost.So as to implement on the spot in grown place for biogas processing, establish Equipment condition.Based on this, on the field of the length and breadth of land, as long as the coast is clear, the resource of agriculture and forestry organic waste material is available, most Limits expand agriculture and forestry organic waste material and develop spatial dimension.
2nd, Marsh gas compression liquefaction can packing machine vehicle-mountedization, changes the intensive mode of agriculture and forestry organic waste material production biogas, it is to avoid big Scale transport straw needed for set up fleet investment, reduce high-volume transport stalk and transport biogas residue waste transport into Sheet and power cost.
3rd, vehicle-mounted type Marsh gas compression liquefaction can packing machine, changes the thinking that existing process only reclaims methane, while reclaiming dioxy Change carbon, not only realize that low-carbon agriculture develops, also add the side-product income of biogas processing, make biogas secondary industry economic benefit Increase considerably.
4th, it is advanced more than, by 2.5 yuan/Nm of methane3, 500 yuan/ton of calculation of price of carbon dioxide, on the one hand increase biogas Processing sell income 26.36%, on the other hand reduces industry operation power cost 47.91% and cost of transportation 70%, makes biogas Profit is processed from 0.03 yuan/Nm3Increase to 0.544 yuan/Nm3, reversed the infeasible situation of the conventional economic benefit of the industry.
5th, reclaim carbon dioxide, be applied to modern installations agricultural gaseous fertilizer, not only can increase crop yield 70% to 90%, also dissolve agriculture low-carbon mode production requirement reduction CO2 emission and increase the lance for needing agricultural product to increase production with population Shield.

Claims (10)

1. a kind of vehicle-mounted methane compression separates liquefaction can packing machine, including：Carrying cart (1), can packing machine unit (10), it is described canned Machine unit (10) is on the platform of the carrying cart (1), it is characterised in that：The can packing machine unit (10) is including desulfurizing tower (3), decarbonizing tank (4), drain sump (5), biogas liquefied tank (6) are washed, is followed in series to form by pipeline；
The can packing machine unit (10) also includes compressor (2), and the compressor (2) is divided into two groups, first group be connected on it is described Between desulfurizing tower (3), washing decarbonizing tank (4), second group is connected between the drain sump (5), biogas liquefied tank (6).
2. a kind of vehicle-mounted methane compression according to claim 1 separates liquefaction can packing machine, it is characterised in that：The compression Machine (2) is Pyatyi compressor, is first group of compressor after the series connection of one or two three stage compressions, is described after the compression series connection of four Pyatyis Second group of compressor；Desulfurization biogas pressure after described first group of compressor (2) compression enters institute to 7-8MPa State washing decarbonizing tank (4)；Dehydration methane gas pressure after described second group of compressor (2) compression is entered to 25MPa The biogas liquefied tank (6).
3. a kind of vehicle-mounted methane compression according to claim 1 and 2 separates liquefaction can packing machine, it is characterised in that：It is described Desulfurizing tower (3), washing decarbonizing tank (4) are arranged side by side in the carrying cart (1) platform front and are fixed on support, horizontal institute State biogas liquefied tank (6), the drain sump (5) to be respectively two and be set in parallel in the carrying cart (1) rear in front and back, two The drain sump (5) is suspended from the biogas liquefied tank (6) and is arranged above by support (100), and the compressor (2) is placed in institute State between desulfurizing tower (3) and biogas liquefied tank (6)；
The external biogas source of air inlet (31) on desulfurizing tower (3) top, its underpart gas outlet (32) are by desulfurization biogas pipeline (8) inlet end of first group of compressor (2), outlet side and the washing decarburization of first group of compressor (2) are connected The air inlet (44) of tank (4) bottom is connected by first group of compressed gas pipeline one (91), washing decarbonizing tank (4) top vent Mouth (41) is connected in parallel the drain sump air inlet of two described drain sump (5) one end by first group of compressed gas pipeline two (92) (52), first group of compressed gas pipeline three is passed through after drain sump gas outlet (51) parallel connection of two drain sump (5) other ends (93) inlet end of second group of compressor (2) is connected, the outlet side of second group of compressor (2) passes through second group of compression Feed channel (101) connects the high pressure gas pipeline entrance (65) at the top of the biogas liquefied tank (6).
4. a kind of vehicle-mounted methane compression according to claim 2 separates liquefaction can packing machine, it is characterised in that：The desulfurization Tower (3) is vertical closed tank, built-in several diaphragm plates, and adjacent diaphragm plate is crisscross arranged breach, and slightly has a down dip to breach end, Filling desulfurizing agent in its tower body, and air inlet (31), gas outlet (32), charging aperture (33), discharging opening (34) are provided with, it is described de- The external biogas source of air inlet (31) of sulfur tower, the gas outlet (32) connects first group of compressor (2) inlet end；It is described enter QI KOU (31), gas outlet (32) form for long tube grafting, and the charging aperture (33) is arranged positioned at tank body top vertical, the charging Horizontal grafting and the air inlet (31) is connected on the wall of mouthful (33) side, the discharging opening (34) is vertically arranged positioned at tank base, Horizontal grafting on the wall of discharging opening (34) side connects the gas outlet (32).
5. a kind of vehicle-mounted methane compression according to claim 1 and 2 separates liquefaction can packing machine, it is characterised in that：It is described Washing decarbonizing tank (4) is vertical partition formula water washing tank, and it is closed tank, and inner vertical is provided with midfeather (49) by tank body It is divided into former and later two halfth areas, midfeather (49) side is connected with washing decarbonizing tank (4) inwall and shuts, opposite side Gap (410) is left with washing decarbonizing tank (4) inwall；Along the vertical direction level sets in washing decarbonizing tank (4) tank body Multiple washings decarbonizing tank diaphragm plate (48) are equipped with, region separates two halves by midfeather between adjacent diaphragm plate, each described washing Decarbonizing tank diaphragm plate (48) is provided with opening, and the neighbouring washing decarbonizing tank diaphragm plate opening is placed in front and back partly Area, and the opening is arranged at the midfeather (49) and shuts end；Washing decarbonizing tank (4) bottom is provided with washing decarbonizing tank Leakage fluid dram (42), top is provided with washing decarbonizing tank air vent (41), and wall top in side is provided with washing decarbonizing tank inlet (43), Described to wash the external pure water water source of decarbonizing tank inlet (43), tank wall lower section is provided with washing decarbonizing tank air inlet (44), washing decarbonizing tank air inlet (44) is the long tube for being horizontally inserted tank body, the inner end head closing of its insertion, inserts segment length Ventilating microhole (47), and compressor (2) outlet side described in external first group are provided with pipe.
6. a kind of vehicle-mounted methane compression according to claim 1 and 2 separates liquefaction can packing machine, it is characterised in that：It is described Drain sump (5) is horizontal closed tank, and its internal longitudinal direction is vertically arranged with vertical clapboard (58) and will be divided into former and later two in tank body Halfth area, vertical clapboard (58) top is connected with inner tank wall, and gap, the drain sump are left in bottom with inner tank wall (5) internal filling dehydrated adsorbent and it is parallel to each other in left-right direction and is vertically arranged with multiple drain sump diaphragm plates (57), phase Region separates two halves by midfeather between adjacent diaphragm plate, and each described drain sump diaphragm plate (57) top is provided with opening, phase The opening of the adjacent drain sump diaphragm plate (57) is placed in former and later two halfth areas, and drain sump (5) the left and right two ends are respectively provided with There are drain sump air inlet (52), drain sump gas outlet (51), drain sump air inlet (52) connection is described to wash decarbonizing tank row QI KOU (41), the drain sump gas outlet (51) connects second group of compressor inlet end of the compressor (2), and top is provided with Drain sump charging aperture (53), bottom are provided with drain sump discharging opening (54)；The drain sump (5) is that two alternatings in parallel make With, the drain sump charging aperture (53), drain sump discharging opening (54) are provided between the adjacent drain sump diaphragm plate (57), The adjacent drain sump charging aperture (53) is placed in and drain sump top and separates before and after halfth area by diaphragm plate (58) and arrange side by side Cloth.
7. a kind of vehicle-mounted methane compression according to claim 1 and 2 separates liquefaction can packing machine, it is characterised in that：It is described Biogas liquefied tank (6) is vertical closed tank, and tank body inner bottom part is filled with liquefaction auxiliary agent (67), biogas liquefied tank (6) bottom Portion is provided with liquid material and imports and exports (64), and top is provided with high pressure gas pipeline entrance (65), and the high pressure gas pipeline entrance (65) is Built-in high pressure gas pipeline, one section of single tube and left and right two-way is separated by its bottom that the high pressure gas pipeline is arranged by top vertical The high pressure gas pipeline arm (651) being vertically arranged is constituted, and the bottom of the high pressure gas pipeline arm is immersed in the liquefaction auxiliary agent (67) in and horizontal high pressure appendix arm (652) of horizontally set is connected, is set on the horizontal high pressure appendix arm (652) High pressure micropore is equipped with, the liquid material imports and exports (64) and is vertically arranged liquid in-out expects pipe (641), liquid in-out expects pipe (641) top End is extended down to the top in the biogas liquefied tank (6), and the liquid in-out expects pipe top is provided with high pressure micropore, the high pressure gas transmission Tube inlet (65) connects the outlet side of second group of compressor of the compressor (2), and biogas liquefied tank (6) top is provided with Relief valve, pressure gauge, the biogas liquefied tank (6) is used alternatingly for two parallel connections, and the biogas liquefied tank (6) is two parallel connections It is used alternatingly.
8. a kind of vehicle-mounted methane compression according to claim 7 separates liquefaction can packing machine, it is characterised in that：The liquefaction Auxiliary agent is five carbon above alkane or alkene liquefaction auxiliary agent, and volume accounts for the molten long-pending 1/5-2/5 of tank body, and the liquefaction auxiliary agent is 2,2 two One kind in the mixture of methylpropane and isomery dodecane or 2- methybutanes and isomery dodecane, 2 in described mixture, 2 dimethylpropanes and isomery dodecane ratio of weight and number are 5~10:5~0,2- methybutanes and isomery in described mixture Dodecane ratio of weight and number is 5~10:5~0.
9. a kind of vehicle-mounted methane compression separates liquifying method, it is characterised in that：Each step enters as follows, and following steps are in room temperature Under carry out：
Step one：Pending biogas is passed through in desulfurizing tower (3) by air inlet (31), filling in the desulfurizing tower (3) Desulfurizing agent carries out reaction absorption desulfurization with pending biogas, and biogas is desulfurized purification；
Step 2：Biogas after step one desulfurization is discharged by the gas outlet (32) of the desulfurizing tower and the of compressor is passed through One group of compressor, gas pressure is 8.0MPa after compression, and biogas is pressurized after first group of compression；
Step 3：Biogas after being pressurized in step 2 is passed through into the washing decarbonizing tank by washing decarbonizing tank air inlet (44) (4) in, pure water is passed through by washing decarbonizing tank inlet (43), biogas is with pure water in washing decarbonizing tank (4) The aqueous solution of the carbon dioxide obtained after interior hybrid reaction, with pure water hybrid reaction, by the washing decarbonizing tank leakage fluid dram (42) discharge, the biogas Jing after decarburization is separated is that biological flue gas are discharged by washing decarbonizing tank air vent (41)；
Step 4：The biological flue gas discharged after decarburization in step 3 are passed through into the dehydration by the drain sump air inlet (52) In tank (5), adsorption dewatering reaction is carried out with the dehydrated adsorbent of its interior filling, the biological flue gas that are dried obtained after dehydration lead to Cross the drain sump gas outlet (51) to discharge；
Step 5：The biological flue gas that step 4 is discharged further are pressurizeed by second group of compressor of the compressor, is compressed Afterwards gas pressure is 25MPa, and biological flue gas are pressurizeed after second group of compression；
Step 6：Being dried after pressurizeing in step 5 is described in biological flue gas are passed through by the high pressure gas pipeline entrance (65) again In biogas liquefied tank (6), it is dried after biological flue gas are mixed with the auxiliary agent (67) that liquefies, biological flue gas are liquefied storage.
10. as claimed in claim 9 a kind of vehicle-mounted methane compression separates liquifying method, it is characterised in that：The liquefaction auxiliary agent For five carbon above alkane or alkene liquefaction auxiliary agent, volume accounts for the molten long-pending 1/5-2/5 of tank body, and the liquefaction auxiliary agent is 2,2 dimethyl One kind in the mixture of propane and isomery dodecane or 2- methybutanes and isomery dodecane, 2,2 dimethylpropanes and isomery The ratio of weight and number of dodecane or 2- methybutanes and isomery dodecane mixture is 5~10:5~0.
CN201710009125.4A 2017-01-06 2017-01-06 A kind of vehicle-mounted methane compression separation liquefaction can packing machine Active CN106675681B (en)

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CN203108424U (en) * 2013-03-11 2013-08-07 中国大唐集团环境技术有限公司 Flue gas treatment apparatus performing desulfurization and denitrification simultaneously
CN203530266U (en) * 2013-10-22 2014-04-09 中聚天冠生物能源有限公司 Drying device for preparing compressed biogas by using methane
EP2732865A2 (en) * 2012-11-15 2014-05-21 Gas Technology Institute Integrated hybrid membrane/absorption process for CO2 capture and utilization

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1980879A (en) * 2004-07-01 2007-06-13 巴斯福股份公司 Method for the production of acrolein, acrylic acid, or a mixture thereof from propane
CN101014801A (en) * 2004-08-26 2007-08-08 西翁马里泰姆公司 Storage of natural gas in liquid solvents and methods to absorb and segregate natural gas into and out of liquid solvents
EP2732865A2 (en) * 2012-11-15 2014-05-21 Gas Technology Institute Integrated hybrid membrane/absorption process for CO2 capture and utilization
CN103074134A (en) * 2013-01-05 2013-05-01 上海杲晟实业有限公司 Method for preparing biogas and carbonate by straw wastes
CN203108424U (en) * 2013-03-11 2013-08-07 中国大唐集团环境技术有限公司 Flue gas treatment apparatus performing desulfurization and denitrification simultaneously
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