CN105695014A - Methane purification and primary filtration device - Google Patents

Methane purification and primary filtration device Download PDF

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Publication number
CN105695014A
CN105695014A CN201610057076.7A CN201610057076A CN105695014A CN 105695014 A CN105695014 A CN 105695014A CN 201610057076 A CN201610057076 A CN 201610057076A CN 105695014 A CN105695014 A CN 105695014A
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Prior art keywords
liquid pool
methane
tank body
inlet chamber
cascade filtration
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CN105695014B (en
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甘海南
段明秀
梁立宽
张广兰
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Shangao Shifang Environmental Protection Energy Group Co ltd
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Shandong Sifon Environmental Protection & Bio-Energy 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
    • C10L3/102—Removal of contaminants of acid contaminants
    • C10L3/103—Sulfur containing contaminants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B01D53/047—Pressure swing adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/52—Hydrogen sulfide
    • B01D53/526—Mixtures of hydrogen sulfide and carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/62—Carbon oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16—Alumino-silicates
    • B01J20/18—Synthetic zeolitic molecular sieves
    • B01J20/186—Chemical treatments in view of modifying the properties of the sieve, e.g. increasing the stability or the activity, also decreasing the activity
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/18—Carbonates
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/30—Alkali metal compounds
    • B01D2251/304—Alkali metal compounds of sodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/40—Alkaline earth metal or magnesium compounds
    • B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/106—Silica or silicates
    • B01D2253/108—Zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2256/00—Main component in the product gas stream after treatment
    • B01D2256/24—Hydrocarbons
    • B01D2256/245—Methane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/10—Single element gases other than halogens
    • B01D2257/102—Nitrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/304—Hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/12—Methods and means for introducing reactants
    • B01D2259/124—Liquid reactants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

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  • Chemical & Material Sciences (AREA)
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  • Analytical Chemistry (AREA)
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  • Health & Medical Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Gas Separation By Absorption (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses a methane purification and primary filtration device which comprises a filtration tank, wherein the filtration tank is connected with a methane collection tank; methane is collected from the methane collection tank; generally, a blower is utilized for pumping out the methane in the methane collection tank and then pumping the methane into the filtration tank; the filtration tank comprises a tank body, the tank body is internally provided with a clapboard which divides the tank body into upper and lower parts, and an opening is reserved in the middle of the clapboard; the bottom of the tank body is provided with a gas inlet cavity, the upper side of the gas inlet cavity is provided with a primary filtration chamber, and a secondary filtration chamber is formed above the clapboard. The methane purification and primary filtration device has the beneficial effects that the design is reasonable and the structure is simple; by virtue of arranging the independent gas inlet cavity, the inlet gas is divided into two branches, one branch of gas is discharged by virtue of a gas vent in a spiral gas inlet pipe, and is changed into irregular flow direction to collide and interfere with the other branch of gas so as to achieve a speed reduction effect; a filter screen is internally provided with natural clinoptiloite zeolite which serves as an adsorbent, so that a primary purification and filtration effect for the methane is achieved.

Description

A kind of methane purification primary filter
Technical field
The present invention relates to biomass energy and develop field, particularly to a kind of methane purification primary filter。
Background technology
Biogas is a kind of fuel gas with higher thermal value, is mainly composed of methane (CH4) and carbon dioxide (CO2) and a small amount of nitrogen (N2), hydrogen (H2), oxygen (O2), hydrogen sulfide (H2The gas such as S), wherein methane content is 45%～60%。Compared with other combustion gas, the biogas capability of antidetonance is better, is that one well cleans fuel, mostly utilizes biogas to carry out warming oneself traditionally, cooking and illumination。Along with being continuously increased of biogas output, the middle and high end utilization ways of biogas constantly extends, and marsh gas purifying can be used for cogeneration of heat and power, be incorporated to gas distributing system after purifying, vehicle fuel, industrial chemicals and fuel cell etc.。The Laholm biogas plant of Sweden's foundation in 1992 is the first factory that biological methane is incorporated to gas distributing system of Sweden。China the thirties in 20th century rural area begin to build underground methane-generating pit, to the end of the year 2008, whole nation domestic methane tank has reached more than 3,000 ten thousand mouthfuls, and the big-and-middle-sized biogas engineering such as livestock and poultry farm, food processing, brewery, municipal sewage plant reaches 1600 many places, produces biogas per year and totals over 14,000,000,000 m3, contrast China natural gas consumption 70,000,000,000 m in 20083, this part energy is considerable。At present, substantial amounts of biogas utilization is still based on low-grade heat utilization, along with centralized biogas engineering development, single methane engineering methane yield constantly increases, and generates electricity and purification vehicle fuel homenergic utilization rate processed is higher, the more technology of energy output is needed badly and is promoted。
Biogas is as a kind of natural energy source, biogas is after the pretreatment such as desulfurization, dehydration, dedusting, pressurization, enter pressure-swing absorption apparatus, by boosting, absorption, along putting, after the operation such as inverse put and evacuation, methane is gone out by pressure-swing absorber top row, and collects as gas product, and pipeline delivers into gas ductwork or the outward transport of high pressure tank car, the adsorbed component such as carbon dioxide and nitrogen, is discharged by the bottom of tower after desorbing。But greenhouse effect occur owing to the various reasons of social development causes carbon dioxide to discharge in a large number, it is such as in recent years: tellurian pest and disease damage increases；Sea level rise；Adverse weather, Marine Storm Genesis increases；Dry land, desertification area increase, even turn cold winter wait harm embodiment more and more obvious。Additionally tradition methane purification primary filter is because of the relation of its operation principle, it is necessary to gas carries out repeated multiple times process and causes that cumulative volume is very big。
Summary of the invention
In order to solve the problems referred to above, the invention provides a kind of methane purification primary filter, as the primary filter in methane purification preprocessing process, including filtering tank, described filtering tank is connected with biogas air collector, biogas is collected from described biogas air collector, blower fan is generally adopted to be extracted out by the biogas in biogas air collector during use, squeeze in described filtering tank, described filtering tank includes tank body, it is provided with the dividing plate separated up and down by described tank body in described tank body, in the middle part of described dividing plate, leaves opening；Described dividing plate tilts along described opening to both sides, becomes inverted " v " shape, and described dividing plate upper surface is the cambered surface that centre raises up, and described dividing plate both sides are provided with guiding gutter。Described tank base arranges inlet chamber, arranges single filter room on the upside of described inlet chamber, and described dividing plate is provided above cascade filtration room；Labyrinth type drainage screen it is provided with in described inlet chamber。
Spiral air inlet pipe and some drainage screens it is provided with in described inlet chamber, described drainage screen only has one end and is connected with the cavity wall of described inlet chamber, what described drainage screen interlocked up and down is arranged in described inlet chamber, described drainage screen is grid framework, arranging modified clinoptilolite adsorbent in described framework, this adsorbent adsorbs mainly for nitrogen。Described air inlet pipe is through described drainage screen, described inlet chamber arranged outside air inlet, and described air inlet one end connects with described biogas air collector, other end connecting tee, the other two ends of described threeway, one end is connected with described air inlet pipe, and the other end is passed directly in described inlet chamber；In described air inlet pipe, distribution has steam vent, and described inlet chamber top arranges some passages；Because biogas is slowly produced by chemical reaction, so it is very little generally to collect own pressure in the air collector of biogas, it is thus desirable to the biogas in air collector is extracted out by blower fan, consider the effect of primary filter in order to improve biogas, by the inlet chamber of special construction, the biogas of entrance is slowed down, biogas is divided into two parts after entering described threeway by described air inlet, it is partly into described air inlet pipe, another part is then directly entered in described inlet chamber, entrance gas distribution is also functioned to slowing effect herein, enter the biogas in described air inlet pipe, in advance process, discharge from the steam vent body, and because air inlet pipe is spiral type, so the biogas direction discharged is irregular；On the other hand, the biogas of the inlet chamber being directly entered, under the effect of drainage screen, its speed reduces, simultaneously with the abnormal flow discharged in air inlet pipe to biogas collision, speed reduces further, the adsorbent in drainage screen carry out preliminary absorption, wherein the foreign gas such as nitrogen is tentatively adsorbed a part, enters in single filter room via the passage at described inlet chamber top afterwards。
Described single filter room is provided with single filter liquid pool, and described single filter liquid pool is arranged on the upside of described inlet chamber, arranges gas blow head bottom described single filter liquid pool, and described gas blow head is connected by trachea with the described passage at described inlet chamber top；Described gas blow head is cylindrical, and on it, distribution has fine and closely woven aperture, selects the alkali resistant materials such as plastics, resin, glass to make。The effect that the biogas of entrance is dispersed into tiny bubble can be played, improve the effect of gas filtration effect。
Described cascade filtration room is provided with the cascade filtration liquid pool being connected with described tank body medial wall, arranges ultrasonic transducer bottom described cascade filtration liquid pool；
The filtrate used in described single filter liquid pool is sodium hydroxide solution, and the filtrate used in described cascade filtration liquid pool is aqua calcis。When biogas enters in described single filter liquid pool time, hydrogen sulfide therein reacts with filtrate with carbon dioxide etc., reaches the purpose of single filter with this。
Described cascade filtration liquid pool is annular, and described ultrasonic transducer arranges four, is evenly distributed in bottom described cascade filtration liquid pool。Via single filter liquid pool gas upwards when arriving described dividing plate, then gather along the direction of described dividing plate to the opening part in the middle part of it。The upper space of described dividing plate is entered from opening part。Aqua calcis in described cascade filtration liquid pool is atomized by described ultrasonic transducer, the aqua calcis of atomization will overflow described cascade filtration liquid pool, react with biogas out from described opening, because being the calcium hydroxide of atomization, and the aqua calcis that loop configuration can ensure that atomization falls from annular center opening part concentration, biogas is again discharge after gathering via opening simultaneously, therefore can play well carbon dioxide absorption effect。
Being interconnected bottom described single filter liquid pool and the one-level liquid-adding cell being arranged at outside described tank body, described cascade filtration liquid pool connects with bottom the two grades of liquid-adding cells being arranged at outside described tank body, and described one or two grades of liquid-adding cells are provided with top cover。By one or two grades of liquid-adding cells outside described tank body, it can be observed that the amount of solution in a cascade filtration liquid pool is how many, and can conveniently from here towards a cascade filtration liquid pool adding or extracting the solution needed out。Top cover prevents dust foreign material etc. from falling in one or two grades of liquid-adding cells, the pipeline that results in blockage, affects the unexpected damages such as solution。
The junction of described dividing plate and described tank body is arranged below connecing liquid box。Entering the biogas of cascade filtration room via described dividing plate, become calcium carbonate with after the calcium hydroxide reaction of atomization, because calcium carbonate is heavier, so the upper surface of described dividing plate can be dropped down onto, and calcium carbonate may proceed to become calcium bicarbonate with carbon dioxide reaction。In addition described dividing plate is centered by opening, sidewall to described tank body becomes inverted " v " shape to tilt, described dividing plate upper surface is the cambered surface that middle part is protruding, when calcium carbonate or calcium bicarbonate run up to a certain amount of after can enter guiding gutter flowing down along the upper surface of described dividing plate, connect described in finally entering in liquid box。
Be provided with water pump on the upside of described cascade filtration liquid pool, described water pump connect drainage tube, described drainage tube water inlet end be arranged at described in meet liquid cassette bottom portion, water side is placed in above described cascade filtration liquid pool。Described connecing has the calcium carbonate and calcium bicarbonate collected from described dividing plate in liquid box, tosca is in bottom, the water inlet end of described drainage tube meets liquid cassette bottom portion described in being arranged on, can calcium carbonate soln be withdrawn in described cascade filtration liquid pool by described water pump, because calcium carbonate can continue reaction with carbon dioxide and become calcium bicarbonate, so may continue as the filtrate use of carbon dioxide via the atomization of described ultrasonic transducer。Aqua calcis so can be made to make full use of。Finally reclaim calcium bicarbonate solution as side-product。
Described tank body upper surface connects solar charging panel, and described solar charging panel connects accumulator, electrically connects with described water pump。
Improved primary filter has good filter effect, can simplifying the required equipment used of subsequent purification process, make single unit system simplify, volume reduces, convenient transportation, it is possible to achieve go to collect and purifying biogas with Container Transport single unit system to each biogas collection point between town and country。
The technical scheme that the embodiment of the present invention provides has the benefit that the present invention is reasonable in design, simple in construction, by arranging independent inlet chamber, the gas making entrance is divided into two strands, wherein one gas is made to discharge and become the irregular flow direction by the steam vent arranged on spiral air inlet, mutually collide the effect that interference reaches to slow down with another strand of gas, drainage screen arranges natural clinoptilolite as adsorbent, play the effect that biogas preliminary purification is filtered。By gas blow head, biogas is disperseed, improve the effect of absorbing and filtering。Inverted " v " shape structure and opening can gather the biogas middle part to cascade filtration room, filtrate after atomization is fallen can be fully contacted with biogas by annular center opening, water receiving tank, water pump, drainage tube combine and make because the calcium carbonate that reaction becomes again acts as absorbing carbon dioxide, and eventually become calcium bicarbonate side-product, it is to avoid the problem that traditional methane purification method needs to discharge carbon dioxide。In addition improved primary filter has good filter effect, can simplifying the required equipment used of subsequent adsorbtion process, so that whole installation simplifies, volume reduces, convenient transportation, it is achieved go to collect and purifying biogas with Container Transport to each biogas collection point between town and country。
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram。
Wherein, accompanying drawing is labeled as: 1, tank body；2, dividing plate；3, opening；4, inlet chamber；5, air inlet pipe；6, drainage screen；7, passage；8, single filter liquid pool；9, gas blow head；10, cascade filtration liquid pool；11, ultrasonic transducer；12, one-level liquid-adding cell；13, two grades of liquid-adding cells；14, liquid box is connect；15, water pump；16, drainage tube；17, solar charging panel。
Detailed description of the invention
It is all by CO2 emission to air for tradition methane purification, and the problem that single unit system is bigger, the present invention provides a kind of methane purification primary filter。
Embodiment one:
A kind of methane purification primary filter is the invention provides referring to Fig. 1, as the primary filter in methane purification preprocessing process, including filtering tank, filtering tank is connected with biogas air collector, collects biogas from biogas air collector, generally adopts blower fan to be extracted out by the biogas in biogas air collector during use, squeeze in filtering tank, filtering tank includes tank body 1, is provided with the dividing plate 2 separated by tank body about 1, leaves opening 3 in the middle part of dividing plate 2 in tank body 1；Dividing plate 2 tilts along opening 3 to both sides, becomes inverted " v " shape, and dividing plate 2 upper surface is the cambered surface that centre raises up, and dividing plate 2 both sides are provided with guiding gutter。Arranging inlet chamber 4 bottom tank body 1, arrange single filter room on the upside of inlet chamber 4, dividing plate 2 is provided above cascade filtration room；Labyrinth type drainage screen 6 it is provided with in inlet chamber 4。
Spiral air inlet pipe 5 and some drainage screens 6 it is provided with in inlet chamber 4, drainage screen 6 only has one end and is connected with the cavity wall of inlet chamber 4, what drainage screen about 6 was staggered is arranged in inlet chamber 4, drainage screen 6 is grid framework, arranging modified clinoptilolite adsorbent in framework, nitrogen is mainly adsorbed by modified clinoptilolite adsorbent。Air inlet pipe 5 is through drainage screen 6, and inlet chamber 4 arranged outside air inlet, air inlet one end connects with biogas air collector, other end connecting tee, the other two ends of threeway, and one end is connected with air inlet pipe 5, and the other end is passed directly in inlet chamber 4；In air inlet pipe 5, distribution has steam vent, and inlet chamber 4 top arranges some passages 7；Because biogas is slowly produced by chemical reaction, so it is very little generally to collect own pressure in the air collector of biogas, it is thus desirable to the biogas in air collector is extracted out by blower fan, consider the effect of primary filter in order to improve biogas, by the inlet chamber of special construction, the biogas of entrance is slowed down, biogas is divided into two parts after entering threeway by air inlet, it is partly into air inlet pipe 5, another part is then directly entered in inlet chamber 4, entrance gas distribution is also functioned to slowing effect herein, enter the biogas in air inlet pipe 5, in advance process, discharge from the steam vent body, and because air inlet pipe 5 is spiral type, so the biogas direction discharged is irregular；On the other hand, the biogas of the inlet chamber 4 being directly entered, under the effect of drainage screen 6, its speed reduces, simultaneously with the abnormal flow discharged in air inlet pipe 5 to biogas collision, speed reduces further, the adsorbent in drainage screen 6 carry out preliminary absorption, wherein the foreign gas such as nitrogen is tentatively adsorbed a part, enters in single filter room via the passage 7 at inlet chamber 4 top afterwards。
Single filter room is provided with single filter liquid pool 8, and single filter liquid pool 8 is arranged on the upside of inlet chamber 4, arranges gas blow head 9 bottom single filter liquid pool 8, and gas blow head 9 is connected by trachea with the passage 7 at inlet chamber 4 top；Gas blow head 9 is cylindrical, and on it, distribution has fine and closely woven aperture, selects the alkali resistant materials such as plastics, resin, glass to make。The effect that the biogas of entrance is dispersed into tiny bubble can be played, improve the effect of gas filtration effect。
Cascade filtration room is provided with the cascade filtration liquid pool 10 being connected with tank body 1 medial wall, arranges ultrasonic transducer 11 bottom cascade filtration liquid pool 10；
The filtrate used in single filter liquid pool 8 is sodium hydroxide solution, and the filtrate used in cascade filtration liquid pool 10 is aqua calcis。When biogas enters in single filter liquid pool 8 time, hydrogen sulfide therein reacts with filtrate with carbon dioxide etc., reaches the purpose of single filter with this。
Cascade filtration liquid pool 10 is annular, and ultrasonic transducer 11 arranges four, is evenly distributed in bottom cascade filtration liquid pool 10。Via single filter liquid pool gas upwards when arriving dividing plate 2, then gather along the direction of dividing plate 2 to the opening part in the middle part of it。The upper space of dividing plate 2 is entered from opening part。Aqua calcis in cascade filtration liquid pool 10 is atomized by ultrasonic transducer 11, the aqua calcis of atomization will overflow cascade filtration liquid pool 10, react with biogas out from opening 3, because being the calcium hydroxide of atomization, and the aqua calcis that loop configuration can ensure that atomization falls from annular center opening part concentration, biogas is again discharge after gathering via opening 3 simultaneously, therefore can play well carbon dioxide absorption effect。
Being interconnected bottom single filter liquid pool 8 and the one-level liquid-adding cell 12 being arranged at outside tank body 1, cascade filtration liquid pool 10 connects with bottom the two grades of liquid-adding cells 13 being arranged at outside tank body 1, and one or two grades of liquid-adding cells are provided with top cover。By one or two grades of liquid-adding cells outside tank body 1, it can be observed that the amount of solution in a cascade filtration liquid pool is how many, and can conveniently from here towards a cascade filtration liquid pool adding or extracting the solution needed out。Top cover prevents dust foreign material etc. from falling in one or two grades of liquid-adding cells, the pipeline that results in blockage, affects the unexpected damages such as solution。
The junction of dividing plate 2 and tank body 1 is arranged below connecing liquid box 14。Entering the biogas of cascade filtration room via dividing plate 2, become calcium carbonate with after the calcium hydroxide reaction of atomization, because calcium carbonate is heavier, so the upper surface of dividing plate 2 can be dropped down onto, and calcium carbonate may proceed to become calcium bicarbonate with carbon dioxide reaction。This external partition 2 is centered by opening, sidewall to tank body 1 becomes inverted " v " shape to tilt, dividing plate 2 upper surface is the cambered surface that middle part is protruding, when calcium carbonate or calcium bicarbonate run up to a certain amount of after along the upper surface entrance guiding gutter of dividing plate 2 and flow down, can finally enter and connect in liquid box 14。
Being provided with water pump 15 on the upside of cascade filtration liquid pool 10, water pump 15 connects drainage tube 16, and drainage tube 16 water inlet end is arranged at and connects bottom liquid box 14, and water side is placed in above cascade filtration liquid pool 10。Connect and liquid box 14 has the calcium carbonate and calcium bicarbonate collected from dividing plate 2, tosca is in bottom, the water inlet end of drainage tube 16 is arranged on and connects bottom liquid box 14, can calcium carbonate soln be withdrawn in cascade filtration liquid pool 10 by water pump 15, because calcium carbonate can continue reaction with carbon dioxide and become calcium bicarbonate, so may continue as the filtrate use of carbon dioxide via ultrasonic transducer 11 atomization。Aqua calcis so can be made to make full use of。Finally reclaim calcium bicarbonate solution as side-product。
Tank body upper surface connects solar charging panel 17, and solar charging panel 17 connects accumulator, electrically connects with water pump。
The preparation method of the modified clinoptilolite adsorbent of application in this methane purification primary filter:
Natural clinoptilolite is that is produced from Changbai Mountain, and the main chemical compositions of natural clinoptilolite is:
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
First with 40-60 DEG C of distilled water, natural clinoptilolite is cleaned, at 80 DEG C, dry diel。Then with the hydrochloric acid solution that concentration is 0.1mol/l impregnates 6-8h, with distilled water wash 6-8 time,
In ion exchange column, zeolite is carried out dynamic ion-exchange, first with the CaCl2 solution exchange 2h of 1mol/l at 70 DEG C, exchange 2 times, then deionized water wash is used 2-3 time, zeolite continues at 70 DEG C with the KCl solution exchange 2h of 1mol/l, exchange 1 time, then deionized water wash is used 2-3 time, then zeolite continues at 70 DEG C with the NH4Cl solution exchange 4h of 1mol/l, exchange 2 times, then deionized water wash is used 2-3 time, 8-15min is calcined at finally zeolite being warming up to 200-220 DEG C with the heating rate of 10 DEG C/min under vacuum, then it is cooled to 140-150 DEG C of calcining 20-25min with the rate of temperature fall of 5 DEG C/min, finally it is warming up to 260-270 DEG C of calcining 90-120min with the heating rate of 10 DEG C/min, obtain the clinoptilolite modifiied。
Contrast and application test
Adsorbent N2 adsorbance (mmol/g) under 1 atmospheric pressure CH4 adsorbance (mmol/g) under 1 atmospheric pressure The ratio of N2 and CH4 adsorbance
Matched 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, the adsorbance of nitrogen and methane is all increased by modified clinoptilolite to some extent, but the ratio of the adsorbance of nitrogen and methane is 1.51 before modified, the ratio of the adsorbance of modified nitrogen and methane is 5.01, exceed well over the ratio of the adsorbance of nitrogen before modified and methane be unmodified before 3.32 times。Therefore modified clinoptilolite is obviously improved for pressure-variable adsorption separation of nitrogen/methane effect as nitrogen selective adsorbent, it is possible to as the high-selectivity adsorption agent of pressure-variable adsorption separation of nitrogen, methane。
Embodiment two,
On the basis of embodiment 1, cascade filtration liquid pool 10 is provided above fan。Fan blows to the annular center opening part of cascade filtration liquid pool 10, and the filtrate contributing to atomization floats towards annular center opening part。
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention。

Claims (10)

1. a methane purification primary filter, including filtering tank, described filtering tank is connected with biogas air collector, it is characterized in that, described filtering tank includes tank body (1), being provided with the dividing plate (2) separated up and down by described tank body (1) in described tank body (1), described dividing plate (2) middle part is provided with opening (3), and periphery is fixing with the inwall of described tank body (1) to be connected；Described tank body (1) bottom arranges inlet chamber (4), and described inlet chamber (4) upside arranges single filter room, and described dividing plate (2) is provided above cascade filtration room；Labyrinth type drainage screen (6) it is provided with in described inlet chamber (4)。
2. methane purification primary filter according to claim 1, it is characterised in that:
Air inlet pipe (5) and some described drainage screens (6) it is provided with in described inlet chamber (4), described drainage screen (6) only has one end and is connected with the cavity wall of described inlet chamber (4), described air inlet pipe (5) the described drainage screen of traverse (6), described inlet chamber (4) arranged outside air inlet, described air inlet one end connects with described biogas air collector, other end connecting tee, the other two ends of described threeway, one end is connected with described air inlet pipe (5), and the other end is passed directly in described inlet chamber (4)；The upper distribution of described air inlet pipe (5) has steam vent, and described inlet chamber (4) top arranges some passages (7)；
Described single filter room is provided with single filter liquid pool (8), described single filter liquid pool (8) is arranged at described inlet chamber (4) upside, described single filter liquid pool (8) bottom arranges gas blow head (9), and described gas blow head (9) is connected by trachea with the described passage (7) at described inlet chamber (4) top；
Described cascade filtration room is provided with the cascade filtration liquid pool (10) being connected with described tank body (1) medial wall, and described cascade filtration liquid pool (10) bottom arranges ultrasonic transducer (11)；
The filtrate used in described single filter liquid pool (8) is sodium hydroxide solution, and the filtrate used in described cascade filtration liquid pool (10) is aqua calcis。
3. methane purification primary filter according to claim 2, it is characterised in that described air inlet pipe (5) is serpentine pipe。
4. methane purification primary filter according to claim 2, it is characterised in that described cascade filtration liquid pool (10) is annular, and described ultrasonic transducer (11) arranges four, is evenly distributed in described cascade filtration liquid pool (10) bottom。
5. according to the arbitrary described methane purification primary filter of claim 2-4, it is characterized in that, what described drainage screen (6) interlocked up and down is arranged in described inlet chamber (4), and described drainage screen (6) is grid framework, arranges modified clinoptilolite adsorbent in described framework。
6. according to the arbitrary described methane purification primary filter of claim 2-5, it is characterized in that, described single filter liquid pool (8) and one-level liquid-adding cell (12) bottom being arranged at described tank body (1) outside are interconnected, described cascade filtration liquid pool (10) connects with two grades of liquid-adding cell (13) bottoms being arranged at described tank body (1) outside, and described one or two grades of liquid-adding cells are each provided with top cover。
7. according to the arbitrary described methane purification primary filter of claim 2-6, it is characterised in that the junction of described dividing plate (2) and described tank body (1) is arranged below connecing liquid box (14)。
8. methane purification primary filter according to claim 7, it is characterized in that, described cascade filtration liquid pool (10) upside is provided with water pump (15), described water pump (15) connects drainage tube (16), described drainage tube (15) water inlet end connects liquid box (14) bottom described in being arranged at, and water side is placed in described cascade filtration liquid pool (10) top。
9. according to the arbitrary described methane purification primary filter of claim 1-8, it is characterized in that, described dividing plate (2) tilts along described opening (3) to both sides, becomes inverted " v " shape, described dividing plate (2) upper surface is cambered surface, and described dividing plate (2) both sides are provided with guiding gutter。
10. the preparation method according to the modified clinoptilolite adsorbent applied in the arbitrary described methane purification primary filter of claim 5-9:
First with 40-60 DEG C of distilled water, natural clinoptilolite is cleaned, at 80 DEG C, dry diel；
Then with the hydrochloric acid solution that concentration is 0.1mol/l impregnates 6-8h, with distilled water wash 6-8 time,
In ion exchange column, zeolite is carried out dynamic ion-exchange, first with the CaCl2 solution exchange 2h of 1mol/l at 70 DEG C, exchange 2 times, then deionized water wash is used 2-3 time, zeolite continues at 70 DEG C with the KCl solution exchange 2h of 1mol/l, exchange 1 time, then deionized water wash is used 2-3 time, then zeolite continues at 70 DEG C with the NH4Cl solution exchange 4h of 1mol/l, exchange 2 times, then deionized water wash is used 2-3 time, 8-15min is calcined at finally zeolite being warming up to 200-220 DEG C with the heating rate of 10 DEG C/min under vacuum, then it is cooled to 140-150 DEG C of calcining 20-25min with the rate of temperature fall of 5 DEG C/min, finally it is warming up to 260-270 DEG C of calcining 90-120min with the heating rate of 10 DEG C/min, obtain the clinoptilolite modifiied。
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