CN105713691B - A kind of methane purification absorbing and filtering device - Google Patents

A kind of methane purification absorbing and filtering device Download PDF

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Publication number
CN105713691B
CN105713691B CN201610057664.0A CN201610057664A CN105713691B CN 105713691 B CN105713691 B CN 105713691B CN 201610057664 A CN201610057664 A CN 201610057664A CN 105713691 B CN105713691 B CN 105713691B
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China
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velocity
chamber
biogas
liquid pool
tank body
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CN105713691A (en
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甘海南
段明秀
梁立宽
张广兰
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Zhejiang julibao Textile Technology Co., Ltd
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Jiaxing Reeyah Photoelectric Co Ltd
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    • 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
    • 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
    • C10L3/105—Removal of contaminants of nitrogen
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/44—Deacidification step, e.g. in coal enhancing
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
    • C10L2290/542—Adsorption of impurities during preparation or upgrading of a fuel
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
    • C10L2290/545—Washing, scrubbing, stripping, scavenging for separating fractions, components or impurities during preparation or upgrading of a fuel
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/54—Specific separation steps for separating fractions, components or impurities during preparation or upgrading of a fuel
    • C10L2290/547—Filtration for separating fractions, components or impurities during preparation or upgrading of a fuel

Abstract

The invention discloses a kind of methane purifications to absorb and filter device, including filtering tank, filtering tank is connected with biogas air collector, biogas is collected from biogas air collector, and usually the biogas in biogas air collector is extracted out with wind turbine, is squeezed into filtering tank, filtering tank includes tank body, it is provided with the partition board that will separate above and below tank body in tank body, there are openings, opening to be connected to the gas passage of velocity-reducing chamber above it among partition board；Inlet chamber is arranged in tank base, and by-pass filtration room is arranged on the upside of inlet chamber, secondary filtration room is arranged above partition board.The beneficial effects of the invention are as follows：Reasonable design, it is simple in structure, by the way that individual inlet chamber is arranged, the gas of entrance is set to be divided into two strands, wherein one gas is set to be discharged and become irregular flow direction by the gas vent being arranged on spiral air inlet, interference is mutually collided with another strand of gas and achievees the effect that deceleration, and natural clinoptilolite is set in filter screen as adsorbent, plays the effect filtered to biogas preliminary purification.

Description

A kind of methane purification absorbing and filtering device
Technical field
The present invention relates to biomass energies to develop and use field, more particularly to a kind of methane purification absorbs and filters device.
Background technology
Biogas is a kind of fuel gas with higher thermal value, and main component is methane (CH4) and carbon dioxide (CO2) With a small amount of nitrogen (N2), hydrogen (H2), oxygen (O2), hydrogen sulfide (H2The gases such as S), wherein methane content is 45%~60%. Compared with other combustion gas, the biogas capability of antidetonance is preferable, is a kind of good clean fuel, is traditionally taken mostly using biogas Warm, cooking and illumination.With being continuously increased for biogas output, the middle and high end utilization ways of biogas constantly extend, and marsh gas purifying carries Can be used for cogeneration of heat and power after pure, be incorporated to gas distributing system, vehicle fuel, industrial chemicals and fuel cell etc..Sweden in 1992 The Laholm biogas plants of foundation are the factories that biological methane is incorporated to gas distributing system by Sweden's the first.China is in the 1930s Rural area begins to build underground methane-generating pit, and to the end of the year 2008, national domestic methane tank has reached more than 3,000 ten thousand mouthfuls, livestock and poultry farm, food The large and medium-sized biogas engineerings such as product processing, brewery, municipal sewage plant produce biogas per year and total over 14,000,000,000 up to 1600 many places m3, compare China 70,000,000,000 m of natural gas dosage in 20083, this part energy is considerable.Currently, a large amount of biogas utilization is also It is based on low-grade heat utilization, as centralized biogas engineering continues to develop, single methane engineering methane yield constantly increases Greatly, power generation and the capacity usage ratios higher such as purification vehicle fuel, energy export more technologies there is an urgent need for be promoted.
Biogas as a kind of natural energy source, inhale after the pretreatments such as desulfurization, dehydration, dedusting, pressurization into transformation by biogas Adsorption device, by boosting, absorption, along put, inverse put and after the processes such as vacuumizing, methane is gone out by pressure-swing absorber top row, and conduct Product gas is collected, and pipeline enters gas ductwork or the outward transport of high pressure tank car, and carbon dioxide and nitrogen etc. are by absorbed component, desorption It is discharged afterwards by bottom of tower.But there are greenhouse effects since the various reasons of social development cause carbon dioxide largely to discharge, closely Nian Laiqi is such as：Tellurian pest and disease damage increases；Sea level rise；Adverse weather, Marine Storm Genesis increase；Dry land, desert Change being more and more obvious for the harm embodiments such as area increases or even winter turns cold.In addition traditional methane purification absorb and filter device because For the relationship of its operation principle, need to cause total volume very big the repeated multiple times processing of gas progress.
Invention content
To solve the above-mentioned problems, the present invention provides a kind of methane purifications to absorb and filter device, pre- as methane purification Primary filter in processing procedure, including filtering tank, the filtering tank are connected with biogas air collector, from the biogas collection Biogas is collected in gas tank, and usually the biogas in biogas air collector is extracted out with wind turbine, is squeezed into the filtering tank, the filtering tank Including tank body, the partition board for separating the tank body up and down is provided in the tank body, there are openings at the partition board middle part；It is described every Plate is tilted along described be open to both sides, and at inverted " v " shape, the partition board upper surface is the cambered surface that raises up of middle part, it is described every Plate both sides are provided with diversion trench, are arranged velocity-reducing chamber on the partition board, velocity-reducing chamber be one for biogas by and reach subtract wherein The chamber of fast purpose, the opening are connected to the inlet channel of the velocity-reducing chamber.The tank base is arranged inlet chamber, it is described into Setting by-pass filtration room on the upside of air cavity, the partition board top setting secondary filtration room；Labyrinth type mistake is provided in the inlet chamber The air inlet pipe of strainer and disc type.
The velocity-reducing chamber includes velocity-reducing chamber air inlet pipe, and the velocity-reducing chamber air inlet pipe is spiral shape, passes through velocity-reducing chamber filter screen, The velocity-reducing chamber filter screen is staggered in the velocity-reducing chamber, and only one end is fixedly connected with the inner wall of the velocity-reducing chamber, The velocity-reducing chamber bottom is connect with the partition board, and air-dispersing layer, the air inlet of the opening and the velocity-reducing chamber air inlet pipe is arranged in top The other end of end connection, the velocity-reducing chamber air inlet pipe is closed, and gas vent is distributed on the tube body of the velocity-reducing chamber air inlet pipe；In order to Gather the gas of by-pass filtration room, so the partition board is arranged into inverted " v " shape, and is made by the opening that its middle part is arranged Gas flows out, but therefore structure gas flow rate can be caused to be accelerated, so the open upper side setting velocity-reducing chamber in partition board will accelerate Gas slow down again, to ensure the filter effect of gas.
The air inlet pipe is spiral shape and the filter screen, the filter screen is passed through to only have the chamber of one end and the inlet chamber Wall connects, and the filter screen being set in the inlet chamber staggeredly up and down, the filter screen is grid framework, in the frame It is provided with modified clinoptilolite adsorbent, modified clinoptilolite adsorbent mainly adsorbs nitrogen.The air inlet pipe passes through Air inlet is arranged in the filter screen, the inlet chamber outside, and described air inlet one end is connected to the biogas air collector, the other end Threeway, the other both ends of threeway are connected, one end is connect with the air inlet pipe, and the other end is passed directly into the inlet chamber；Institute It states and gas vent is distributed in air inlet pipe, several ventholes are set at the top of the inlet chamber；Because biogas is slow by chemically reacting Slowly it generates, so it is very small usually to collect itself pressure in the air collector of biogas, it is therefore desirable to will be in air collector by wind turbine Biogas extraction, it is contemplated that in order to improve biogas by-pass filtration effect, by the inlet chamber of special construction by the natural pond of entrance Gas slows down, and biogas is entered after the threeway by the air inlet and is divided into two parts, and a part enters the air inlet pipe, Another part is then directly entered in the inlet chamber, slowing effect will be also functioned into gas distribution herein, into the air inlet Biogas in pipe, during advance, from the gas vent discharge on tube body, and because air inlet pipe is spiral shape, discharge Biogas direction is irregular；On the other hand, the biogas for the inlet chamber being directly entered, under the action of filter screen, speed drop It is low, at the same with the abnormal flow that is discharged in air inlet pipe to biogas collide, speed further decreases, by the adsorbent in filter screen Carry out preliminary absorption, the wherein foreign gases such as nitrogen first by a preliminary absorption part, later via the inlet chamber at the top of Venthole enters in by-pass filtration room.
The by-pass filtration room is provided with by-pass filtration liquid pool, and the by-pass filtration liquid pool is set on the inlet chamber Gas blow head is arranged in side, by-pass filtration liquid pool bottom, and the gas blow head passes through with the venthole at the top of the inlet chamber Tracheae connects；The gas blow head is cylinder, and fine and closely woven aperture is distributed with thereon, selects the alkali resistant materials such as plastics, resin, glass It is made.Play the role of the biogas of entrance being dispersed into tiny bubble, improves gas filtration effect.
The secondary filtration room is provided with the secondary filtration liquid pool being connect with the tank body madial wall, the secondary filtration liquid Ultrasonic transducer is arranged in bottom of pond portion；Secondary filtration liquid pool edge is slightly above the air-dispersing layer.The air-dispersing layer with it is described Gas blow head is made of same material, and gather aperture thereon, plays the effect of dispersion and mitigation of gases flow velocity.
Preferably, secondary filtration liquid pool edge is higher than air-dispersing layer upper surface.
The filtered fluid used in the by-pass filtration liquid pool is sodium hydroxide solution, is used in the secondary filtration liquid pool Filtered fluid is calcium hydroxide solution.When biogas enters in the by-pass filtration liquid pool, hydrogen sulfide therein and titanium dioxide Carbon is reacted with filtered fluid and is absorbed.
The secondary filtration liquid pool is annular, and the ultrasonic transducer is arranged four, is evenly distributed in the two level mistake Reservoir bottom.Via the upward gas of by-pass filtration liquid pool when reaching the partition board, then gather along the direction of the partition board Opening in the middle part of to it.Enter the upper space of the partition board from opening.The ultrasonic transducer is by the two level mistake Calcium hydroxide solution atomization in reservoir, the calcium hydroxide solution of atomization will overflow the secondary filtration liquid pool, and from institute The biogas in bulkhead apertures out is stated to be reacted, because be the calcium hydroxide of atomization, and loop configuration can ensure to be atomized Calcium hydroxide solution from annular center opening concentration fall, biogas is gathered using velocity-reducing chamber deceleration heel row by opening again Go out, therefore can play well to carbon dioxide absorption effect.
The tank wall above the secondary filtration liquid pool, which is provided with, is observed that the secondary filtration liquid pool Observation window.By observation window it is observed that the liquid situation of secondary filtration liquid pool, because calcium carbonate is white precipitate, bicarbonate Calcium is colourless with calcium hydroxide solution, thus in calcium hydroxide solution using the liquid in initial stage secondary filtration liquid pool be it is colourless, When using a period of time after have white precipitate, when white precipitate is gradually reduced to it is no when, illustrate inside filtering liquid-based Originally calcium bicarbonate solution is had been changed to, byproduct can be regarded and taken out, new calcium hydroxide is then added and used as filtered fluid.
The by-pass filtration liquid pool and the level-one liquid-adding cell bottom being set on the outside of the tank body are interconnected, the two level Filtering liquid pool is connected to the two level liquid-adding cell bottom being set on the outside of the tank body, and the two level liquid-adding cell is provided with head cover. By the two level liquid-adding cell on the outside of the tank body, it is observed that the amount of solution in a secondary filtration liquid pool is how many, and It can facilitate from here towards the solution that needs are added or extracted out in a secondary filtration liquid pool.Head cover prevents dust debris etc. from falling into In one secondary filtration liquid pool.
The partition board connects liquid box with setting below the junction of the tank body.Enter secondary filtration room via the partition board Become calcium carbonate after biogas, with the calcium hydroxide reaction of atomization, because calcium carbonate is heavier, the upper of the partition board can be dropped down onto Surface, and calcium carbonate will continue to become calcium bicarbonate with carbon dioxide reaction.In addition the partition board to be centered on being open, to described The side wall of tank body is tilted at inverted " v " shape, and the partition board upper surface is cambered surface, when calcium carbonate or calcium bicarbonate are run up to centainly It can flow down along the diversion trench of the partition board after amount, be connect in liquid box into described.
Water pump is provided on the upside of the secondary filtration liquid pool, the water pump connects drainage tube, and the drainage tube water inlet end is set Liquid cassette bottom portion is met described in being placed in, water outlet is placed in above the secondary filtration liquid pool.Described connect in liquid box has from the partition board The calcium carbonate and calcium bicarbonate of upper collection, for tosca in bottom, the inlet segment of the drainage tube is arranged connects liquid box described Calcium carbonate soln can be withdrawn by the water pump in the secondary filtration liquid pool, because calcium carbonate can be with dioxy by bottom Changing carbon, the reaction was continued becomes calcium bicarbonate, so may continue as the filtering of carbon dioxide via ultrasonic transducer atomization Liquid uses.It is used as the filtered fluid of carbon dioxide via ultrasonic transducer atomization.So calcium hydroxide can be made molten Liquid makes full use of.Finally recycling calcium bicarbonate solution is as byproduct.
The tank body upper surface connects solar charging panel, and the solar charging panel connects accumulator, with the water pump Electrical connection.
Improved primary filter has good filter effect, can simplify and to be used needed for later stage adsorption process Equipment is that whole installation simplifies, and volume reduces, convenient transportation, with Container Transport to each biogas collection point between realization town and country Remove to collect simultaneously purifying biogas.
The advantageous effect that technical solution provided in an embodiment of the present invention is brought is：Reasonable design of the present invention, it is simple in structure, lead to It crosses and individual inlet chamber is set, the gas of entrance is made to be divided into two strands, make wherein one by the gas vent being arranged on spiral air inlet Stock gas is discharged and becomes irregular flow direction, and interference is mutually collided with another strand of gas and achievees the effect that deceleration, filter screen Middle setting natural clinoptilolite plays the effect filtered to biogas preliminary purification as adsorbent.Biogas is divided by gas blow head It dissipates, improves the effect of absorbing and filtering.Inverted " v " shape structure can gather biogas to the middle part of secondary filtration room with opening, and pass through Crossing velocity-reducing chamber reduces gas flow rate, and the filtered fluid after atomization is fallen and can be come into full contact with biogas by annular center opening, is connect Sink, water pump, drainage tube, which combine, to be made because the calcium carbonate that reaction becomes again acts as absorbing carbon dioxide, and eventually becomes carbonic acid Hydrogen calcium byproduct avoids the problem of traditional methane purification method needs carbon dioxide being discharged.In addition improved primary Filter device has good filter effect, can simplify the equipment used needed for subsequent adsorbtion process, to keep single unit system simple Change, volume reduces, convenient transportation, removes to collect simultaneously purifying biogas with Container Transport to each biogas collection point between realization town and country.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
Wherein, reference numeral is：1, tank body；2, partition board；3, it is open；4, inlet chamber；5, air inlet pipe；6, filter screen；7, lead to Stomata；8, by-pass filtration liquid pool；9, it dissipates and starts；10, secondary filtration liquid pool；11, ultrasonic transducer；12, level-one liquid-adding cell； 13, two level liquid-adding cell；14, liquid box is connect；15, water pump；16, drainage tube；17, solar charging panel；18, observation window；21, slow down Chamber；22, velocity-reducing chamber air inlet pipe；23, velocity-reducing chamber filter screen；24, air-dispersing layer.
Specific implementation mode
For traditional methane purification be all by CO2 emission to air and problem that single unit system is larger, this Invention provides a kind of methane purification absorbing and filtering device.
Embodiment one：
Referring to Fig. 1, the present invention provides a kind of methane purifications to absorb and filter device, as in methane purification preprocessing process Primary filter, including filtering tank, filtering tank be connected with biogas air collector, and biogas is collected from biogas air collector, leads to Common wind turbine extracts the biogas in biogas air collector out, squeezes into filtering tank, and filtering tank includes tank body 1, be provided in tank body 1 by The partition board 2 that about 1 tank body separates, there are openings 3 at partition board 2 middle part；Partition board 2 is tilted along opening 3 to both sides, at inverted " v " shape, every 2 upper surface of plate is the cambered surface that middle part raises up, and 2 both sides of partition board are provided with diversion trench, velocity-reducing chamber 21 is arranged on partition board 2, slows down Chamber 21 be one for biogas by and reach the chamber of deceleration purpose wherein, opening 3 is connected to the inlet channel of velocity-reducing chamber 21. Inlet chamber 4,4 upside setting by-pass filtration room of inlet chamber, 2 top setting secondary filtration room of partition board is arranged in 1 bottom of tank body；Inlet chamber Labyrinth type filter screen 6 and disc type air inlet pipe 5 are provided in 4.
Velocity-reducing chamber 21 includes velocity-reducing chamber air inlet pipe 22, and velocity-reducing chamber air inlet pipe 22 is spiral shape, passes through velocity-reducing chamber filter screen 23, Velocity-reducing chamber filter screen 23 is staggered in velocity-reducing chamber 21, and only one end is fixedly connected with the inner wall of velocity-reducing chamber 21, velocity-reducing chamber 21 bottoms are connect with partition board 2, and air-dispersing layer 24 is arranged in top, and opening 3 is connected to the inlet end of velocity-reducing chamber air inlet pipe 22, velocity-reducing chamber into The other end of tracheae 22 is closed, and gas vent is distributed on the tube body of velocity-reducing chamber air inlet pipe 22；In order to gather the gas of by-pass filtration room Therefore body so partition board 2 is arranged into inverted " v " shape, and makes gas flow out by the opening 3 that its middle part is arranged, but can be Structure causes gas flow rate to be accelerated, so the 3 upside setting velocity-reducing chamber 21 of opening in partition board 2 slows down the gas of acceleration again, To ensure the filter effect of gas.
The air inlet pipe 5 being arranged in inlet chamber 4 is spiral disc type air inlet pipe and passes through filter screen 6, filter screen 6 only have one end with The cavity wall of inlet chamber 4 connects, and what about 6 filter screen interlocked is set in inlet chamber 4, and filter screen 6 is grid framework, is set in frame It is equipped with modified clinoptilolite adsorbent, modified clinoptilolite adsorbent mainly adsorbs nitrogen.Air inlet pipe 5 passes through filter screen 6, air inlet is arranged in 4 outside of inlet chamber, and air inlet one end is connected to biogas air collector, and the other end connects threeway, threeway other two End, one end are connect with air inlet pipe 5, and the other end is passed directly into inlet chamber 4；Gas vent is distributed in air inlet pipe 5, inlet chamber 4 pushes up Several ventholes 7 are arranged in portion；Because biogas is slowly generated by chemical reaction, in the air collector for usually collecting biogas Pressure itself is very small, it is therefore desirable to extract the biogas in air collector out by wind turbine, it is contemplated that in order to improve the level-one of biogas The effect of filtering is slowed down the biogas of entrance by the inlet chamber of special construction, biogas by air inlet enter threeway it After be divided into two parts, a part enters air inlet pipe 5, and another part is then directly entered in inlet chamber 4, will enter gas distribution herein Slowing effect is also functioned to, the biogas into air inlet pipe 5, during advance, from the gas vent discharge on tube body, and because into Tracheae 5 is spiral shape, so the biogas direction of discharge is irregular；On the other hand, the biogas for the inlet chamber 4 being directly entered, Under the action of filter screen 6, speed reduces, at the same with the abnormal flow that is discharged in air inlet pipe 5 to biogas collide, speed into One step reduces, and preliminary absorption is carried out by the adsorbent in filter screen 6, and the wherein foreign gases such as nitrogen are first tentatively adsorbed one Point, it is entered in by-pass filtration room via the venthole 7 at 4 top of inlet chamber later.
By-pass filtration room is provided with by-pass filtration liquid pool 8, and by-pass filtration liquid pool 8 is set to 4 upside of inlet chamber, by-pass filtration Gas blow head 9 is arranged in 8 bottom of liquid pool, and gas blow head 9 is connect with the venthole 7 at 4 top of inlet chamber by tracheae；Gas blow head 9 is cylinder Fine and closely woven aperture is distributed in shape thereon, and the alkali resistant materials such as plastics, resin, glass is selected to be made.It plays and disperses the biogas of entrance At the effect of tiny bubble, the effect of gas filtration effect is improved.
Secondary filtration room is provided with the secondary filtration liquid pool 10 being connect with 1 madial wall of tank body, 10 bottom of secondary filtration liquid pool Ultrasonic transducer 11 is set；10 edge of secondary filtration liquid pool is slightly above air-dispersing layer 24.Air-dispersing layer 24 is with gas blow head 9 using same Material make, thereon gather aperture, play the effect of dispersion and mitigation of gases flow velocity.
10 edge of secondary filtration liquid pool is higher than 40 centimeters of 24 upper surface of air-dispersing layer.
The filtered fluid used in by-pass filtration liquid pool 8 is sodium hydroxide solution, the filtering used in secondary filtration liquid pool 10 Liquid is calcium hydroxide solution.When biogas enters in by-pass filtration liquid pool 8, hydrogen sulfide therein and carbon dioxide and filtering Liquid reaction is absorbed.
Secondary filtration liquid pool 10 is annular, and ultrasonic transducer 11 is arranged four, is evenly distributed in secondary filtration liquid pool 10 Bottom.Via the upward gas of by-pass filtration liquid pool when reaching partition board 2, then gather to opening in the middle part of it along the direction of partition board 2 At mouth 3.Enter the upper space of partition board 2 from opening.Ultrasonic transducer 11 is by the calcium hydroxide in secondary filtration liquid pool 10 The calcium hydroxide solution of solution atomization, atomization will overflow secondary filtration liquid pool 10, with from partition board 2 opening in out biogas into Row reaction, because it is the calcium hydroxide of atomization, and also loop configuration can ensure the calcium hydroxide solution being atomized from annular center Opening concentration is fallen, and biogas is to be gathered to be discharged using after the deceleration of velocity-reducing chamber 21 by opening 3, therefore can play well again To carbon dioxide absorption effect.
1 side wall of tank body of 10 top of secondary filtration liquid pool is provided with the observation window it is observed that secondary filtration liquid pool 10 18.The liquid situation of secondary filtration liquid pool 10 is observed that by observation window 18, because calcium carbonate is white precipitate, bicarbonate Calcium is colourless with calcium hydroxide solution, so the use of the liquid in initial stage secondary filtration liquid pool 10 being colourless in calcium hydroxide solution , when using a period of time after have white precipitate, when white precipitate is gradually reduced to it is no when, illustrate inside filtered fluid Substantially calcium bicarbonate solution is had been changed to, byproduct can be regarded and taken out, then add new calcium hydroxide makes as filtered fluid With.
By-pass filtration liquid pool 8 and 12 bottom of level-one liquid-adding cell for being set to 1 outside of tank body are interconnected, secondary filtration liquid pool 10 are connected to 13 bottom of two level liquid-adding cell for being set to 1 outside of tank body, and a two level liquid-adding cell is provided with head cover.Outside by tank body 1 One two level liquid-adding cell of side, it is observed that the amount of solution in a secondary filtration liquid pool is how many, and can conveniently from here The solution needed is added or extracted out into a secondary filtration liquid pool.Head cover prevents dust debris etc. from falling into a secondary filtration liquid pool In.
Partition board 2 connects liquid box 14 with setting below the junction of tank body 1.The biogas for entering secondary filtration room via partition board 2, with Become calcium carbonate after the calcium hydroxide reaction of atomization, because calcium carbonate is heavier, the upper surface of partition board 2 can be dropped down onto, and carbon Sour calcium will continue to become calcium bicarbonate with carbon dioxide reaction.This external partition 2 centered on opening, to tank body 1 side wall at fall " V " font tilts, and 2 upper surface of partition board is cambered surface, can be along partition board 2 after calcium carbonate or calcium bicarbonate run up to a certain amount of Diversion trench flows down, into connecing in liquid box 14.
10 upside of secondary filtration liquid pool is provided with water pump 15, and water pump 15 connects drainage tube 16, the setting of 16 water inlet end of drainage tube In connecing 14 bottom of liquid box, water outlet is placed in 10 top of secondary filtration liquid pool.Connect the carbonic acid for having in liquid box 14 and being collected from partition board 2 Calcium and calcium bicarbonate, tosca are connecing 14 bottom of liquid box in bottom, the inlet segment setting of drainage tube 16, can be by calcium carbonate Solution is withdrawn by water pump 15 in secondary filtration liquid pool 10, because calcium carbonate can the reaction was continued becomes bicarbonate with carbon dioxide Calcium, so being atomized the filtered fluid use that may continue as carbon dioxide via ultrasonic transducer 11.Via ultrasonic transducer 11 atomizations are used as the filtered fluid of carbon dioxide.Can so calcium hydroxide solution be made to make full use of.Finally recycle bicarbonate Calcium solution is as byproduct.
Tank body upper surface connects solar charging panel 17, and solar charging panel 17 connects accumulator, is electrically connected with water pump.
Improved primary filter has good filter effect, can simplify and to be used needed for later stage adsorption process Equipment is that whole installation simplifies, and volume reduces, convenient transportation, with Container Transport to each biogas collection point between realization town and country Remove to collect simultaneously purifying biogas.
This methane purification absorbs and filters the preparation method for the modified clinoptilolite adsorbent applied in device：
Natural clinoptilolite produces for Changbai Mountain, and the main chemical compositions of natural clinoptilolite are：
Component SiO2 MgO Fe2O3 Na2O TiO2 K2O Al2O3 MnO CaO
Content % 66.6 1.94 2.52 0.91 0.55 1.11 12.34 0.12 4.25
Natural clinoptilolite is cleaned with 40-60 DEG C of distilled water first, dries diel at 80 DEG C.Then with a concentration of 6-8h is impregnated in the hydrochloric acid solution of 0.1mol/l, is washed with distilled water 6-8 times,
Dynamic ion-exchange is carried out to zeolite in ion exchange column, the CaCl2 solution of 1mol/l is used first at 70 DEG C 2h is exchanged, exchanges 2 times, is then washed with deionized 2-3 times, zeolite continues the KCl solution at 70 DEG C with 1mol/l and exchanges 2h is exchanged 1 time, is then washed with deionized 2-3 times, and then zeolite continues the NH4Cl solution friendship with 1mol/l at 70 DEG C 4h is changed, exchanges 2 times, is then washed with deionized 2-3 times, finally by zeolite under vacuum with the heating of 10 DEG C/min speed Rate, which is warming up at 200-220 DEG C, calcines 8-15min, is then cooled to 140-150 DEG C of calcining 20- with the rate of temperature fall of 5 DEG C/min 25min is finally warming up to 260-270 DEG C of calcining 90-120min with the heating rate of 10 DEG C/min, obtains modified oblique hair boiling Stone.
Contrast and application test
Adsorbent N2 adsorbances under 1 atmospheric pressure（mmol/g） CH4 adsorbances under 1 atmospheric pressure（mmol/g） The ratio between N2 and CH4 adsorbances
Control group natural clinoptilolite adsorbent 0.1823 0.1204 1.51
Modified clinoptilolite adsorbent 0.8929 0.1782 5.01
As can be known from the results, modified clinoptilolite increases the adsorbance of nitrogen and methane, but before modified The ratio between adsorbance of nitrogen and methane is 1.51, and the ratio between the adsorbance of modified nitrogen and methane is 5.01, far more than before modified Nitrogen and methane the ratio between adsorbance be it is unmodified before 3.32 times.Therefore modified clinoptilolite is as nitrogen selective Adsorbent is used for pressure-variable adsorption separation of nitrogen/methane improvement with obvious effects, can be as pressure-variable adsorption separation of nitrogen, the height of methane Selective absorbent.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.

Claims (4)

1. a kind of methane purification absorbs and filters device, including filtering tank, the filtering tank are connected with biogas air collector, feature It is, the filtering tank includes tank body（1）, the tank body（1）It is inside provided with the tank body（1）The partition board separated up and down（2）, The partition board（2）Middle part is provided with opening（3）, periphery and the tank body（1）Inner wall be fixedly connected, the partition board（2）On set Set velocity-reducing chamber（21）, the opening（3）With the velocity-reducing chamber（21）Inlet channel connection；The tank body（1）Bottom be arranged into Air cavity（4）, the inlet chamber（4）By-pass filtration room, the partition board is arranged in upside（2）Secondary filtration room is arranged in top；It is described into Air cavity（4）Inside it is provided with labyrinth type filter screen（6）And the air inlet pipe of disc type（5）；
The velocity-reducing chamber（21）Including velocity-reducing chamber air inlet pipe（22）, the velocity-reducing chamber air inlet pipe（22）For spiral shape, passes through and slow down Chamber filter screen（23）, the velocity-reducing chamber filter screen（23）It is staggered in the velocity-reducing chamber（21）It is interior, and only one end with it is described Velocity-reducing chamber（21）Inner wall be fixedly connected, the velocity-reducing chamber（21）Bottom and the partition board（2）Air-dispersing layer is arranged in connection, top （24）, the opening（3）With the velocity-reducing chamber air inlet pipe（22）Inlet end connection, the velocity-reducing chamber air inlet pipe（22）It is another End seal is closed, the velocity-reducing chamber air inlet pipe（22）Tube body on gas vent is distributed with；
The inlet chamber（4）The interior filter screen（6）Only one end and the inlet chamber（4）Cavity wall connection, the air inlet Pipe（5）For spiral shape and pass through the filter screen（6）, the inlet chamber（4）Outside be arranged air inlet, described air inlet one end with The biogas air collector connection, the other end connect threeway, the other both ends of threeway, one end and the air inlet pipe（5）Connection, separately One end is passed directly into the inlet chamber（4）It is interior；The air inlet pipe（5）On gas vent, the inlet chamber is distributed with（4）Top is arranged Several ventholes（7）；
The by-pass filtration room is provided with by-pass filtration liquid pool（8）, the by-pass filtration liquid pool（8）It is set to the inlet chamber （4）Upside, the by-pass filtration liquid pool（8）Gas blow head is arranged in bottom（9）, the gas blow head（9）With the inlet chamber（4）Top The venthole（7）It is connected by tracheae；
The secondary filtration room is provided with and the tank body（1）The secondary filtration liquid pool of madial wall connection（10）, the two level mistake Reservoir（10）Ultrasonic transducer is arranged in bottom（11）；The secondary filtration liquid pool（10）Edge is higher than the air-dispersing layer （24）；
The by-pass filtration liquid pool（8）The middle filtered fluid used is sodium hydroxide solution, the secondary filtration liquid pool（10）In make Filtered fluid is calcium hydroxide solution；
The secondary filtration liquid pool（10）The tank body of top（1）Side wall is provided with it is observed that the secondary filtration liquid pool （10）Observation window（18）.
2. methane purification according to claim 1 absorbs and filters device, which is characterized in that the filter screen（6）It hands over up and down Wrong is set to the inlet chamber（4）It is interior, the filter screen（6）For grid framework, the frame is interior to be arranged modified clinoptilolite Adsorbent.
3. methane purification according to claim 1 absorbs and filters device, which is characterized in that the by-pass filtration liquid pool（8） Be set to the tank body（1）The level-one liquid-adding cell in outside（12）Bottom is interconnected, the secondary filtration liquid pool（10）With set It is placed in the tank body（1）The two level liquid-adding cell in outside（13）Bottom is connected to, and the two level liquid-adding cell is provided with head cover.
4. methane purification according to claim 1 absorbs and filters device, which is characterized in that the partition board（2）With the tank Body（1）Junction below setting connect liquid box（14）.
CN201610057664.0A 2016-01-28 2016-01-28 A kind of methane purification absorbing and filtering device Active CN105713691B (en)

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CN101091637A (en) * 2007-06-25 2007-12-26 吴江市方霞企业信息咨询有限公司 Cavity division type cleaner
CN102049239A (en) * 2010-12-07 2011-05-11 浙江大学 Nitrogen oxide adsorbent prepared through ion exchange modification of natural zeolite
CN204170568U (en) * 2014-09-26 2015-02-25 常州友达环保科技有限公司 Micropore bubbling formula air purifier

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Publication number Priority date Publication date Assignee Title
CN101091637A (en) * 2007-06-25 2007-12-26 吴江市方霞企业信息咨询有限公司 Cavity division type cleaner
CN102049239A (en) * 2010-12-07 2011-05-11 浙江大学 Nitrogen oxide adsorbent prepared through ion exchange modification of natural zeolite
CN204170568U (en) * 2014-09-26 2015-02-25 常州友达环保科技有限公司 Micropore bubbling formula air purifier

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