CN109233929A - It is a kind of for purifying the wash mill and washing methods of biogas - Google Patents
It is a kind of for purifying the wash mill and washing methods of biogas Download PDFInfo
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- CN109233929A CN109233929A CN201811245036.0A CN201811245036A CN109233929A CN 109233929 A CN109233929 A CN 109233929A CN 201811245036 A CN201811245036 A CN 201811245036A CN 109233929 A CN109233929 A CN 109233929A
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- spray
- biogas
- section
- lye
- organic solvent
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005406 washing Methods 0.000 title claims abstract description 23
- 239000007921 spray Substances 0.000 claims abstract description 311
- 239000003960 organic solvent Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 239000012530 fluid Substances 0.000 claims abstract description 12
- 230000008569 process Effects 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 115
- 239000007788 liquid Substances 0.000 claims description 41
- BGHCVCJVXZWKCC-UHFFFAOYSA-N tetradecane Chemical compound CCCCCCCCCCCCCC BGHCVCJVXZWKCC-UHFFFAOYSA-N 0.000 claims description 12
- 238000005192 partition Methods 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 7
- 238000000746 purification Methods 0.000 claims description 7
- YCOZIPAWZNQLMR-UHFFFAOYSA-N heptane - octane Natural products CCCCCCCCCCCCCCC YCOZIPAWZNQLMR-UHFFFAOYSA-N 0.000 claims description 6
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 claims description 5
- 239000002028 Biomass Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000003755 preservative agent Substances 0.000 claims description 2
- 230000002335 preservative effect Effects 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- 238000002386 leaching Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 10
- 238000007670 refining Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 45
- -1 siloxanes Chemical class 0.000 description 20
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 17
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 15
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 15
- 229960004424 carbon dioxide Drugs 0.000 description 9
- 229910002092 carbon dioxide Inorganic materials 0.000 description 8
- 239000001569 carbon dioxide Substances 0.000 description 8
- 239000000428 dust Substances 0.000 description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 3
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000005431 greenhouse gas Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- YFCGDEUVHLPRCZ-UHFFFAOYSA-N [dimethyl(trimethylsilyloxy)silyl]oxy-dimethyl-trimethylsilyloxysilane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C YFCGDEUVHLPRCZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- UQEAIHBTYFGYIE-UHFFFAOYSA-N hexamethyldisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)C UQEAIHBTYFGYIE-UHFFFAOYSA-N 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 description 1
- CXQXSVUQTKDNFP-UHFFFAOYSA-N octamethyltrisiloxane Chemical compound C[Si](C)(C)O[Si](C)(C)O[Si](C)(C)C CXQXSVUQTKDNFP-UHFFFAOYSA-N 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000035935 pregnancy Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/18—Spraying or sprinkling
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses a kind of for purifying the wash mill and washing methods of biogas, in the present invention, is divided into clear water spray section, lye spray section and organic solvent spray section before and after sprayed tank, two spray units are at least arranged in each spray section；Spray head is equipped with above each spray unit, and top with adjacent spray unit by being connected to communicating pipe；Each spray section bottom is communicated with drain pipe, and drain pipe is equipped with fluid level control valve；Clear water spray section biogas being passed through in sprayed tank, first in first spray unit, biogas is from bottom to top by spray bucket, spray head sprays clear water in spray bucket from top to bottom, after biogas and clear water come into full contact with, it is repeated the above process into next spray unit, subsequently into next spray section；The similarly biogas after lye spray section and organic solvent spray section are purified after spray washing.The present invention for biogas refining effect it is good, and convenient for operation, it is safe and at low cost.
Description
Technical field
The present invention relates to a kind of wash mill and washing methods, and in particular to a kind of washing dress for purifying biogas
It sets and washing methods.Belong to gas purification purification technique field.
Background technique
Biogas has wide development space and multiple warp as a kind of new and effective renewable green energy resource
Ji environmental benefit.Currently, by application technology as the second resource such as exploitation marsh gas power generation, biogas heatings, using biogas as fuel,
The discharge of greenhouse gases (GHG), molecule and oxynitrides can be reduced.But landfill yard and sludge of sewage treatment plant
The biogas that anaerobic digestion generates also contains dust, hydrogen sulfide, carbon dioxide, silanol and silicon oxygen in addition to main component methane
The other compositions such as alkane, the presence of these impurity seriously affect biogas use, hinder the use value of biogas.
The bigger impurity of harm to the human body is mainly hydrogen sulfide and siloxanes in biogas.Hydrogen sulfide is a kind of nerve
Poison gas can threaten the life and health of people；Hydrogen sulfide and water cooperatively form strong acid, can cause the strong of equipment and pipeline
Strong corrosion；In addition, the SO generated after sulfureted hydrogen burning2, it is combined into sulfurous acid with the vapor in combustion product, makes the gold of equipment
Metal surface generates corrosion, and also will cause the pollution to atmospheric environment.Including biogas meeting of the burning containing volatile siloxane
Combustion engine inner wall surface generates silicon dioxide layer, and silica overlayer will shorten the time that uses of engine, raising replacement cylinder
The frequency of lid and spark plug.In recent years, Bureau for Environmental Protection of Denmark, U.S.EPA and Corning Incorporated and Canadian government had
The report being detrimental to health about siloxanes.
Currently, for this problem, Authorization Notice No. CN102382701B, publication date are on 03 21st, 2012
State's invention patent discloses a kind of device of steady and continuous removing siloxane from combustible gas, the device need at low temperature into
Row, will freeze, and energy consumption is high, at high cost.
Summary of the invention
The object of the present invention is to provide a kind of for purifying the wash mill and washing methods of biogas, for biomass
The refining effect of gas is good, and convenient for operation, it is safe and at low cost.
To achieve the above object, what the present invention used is a kind of for purifying the wash mill of biogas, it is characterised in that:
Including horizontal sprayed tank, it is divided into clear water spray section, lye spray section and organic solvent spray section before and after sprayed tank, it is adjacent
Spray section separated by partition, and two spray units are at least arranged in each spray section；The bottom memory of each spray section sprays
Liquid is equipped with baffle between adjacent spray unit, and baffle top is fixed at the top of the sprayed tank, lower end is located at the liquid of spray liquid
Below face；Spray head is equipped with above each spray unit, and top with adjacent spray unit by being connected to communicating pipe；
Unstripped gas air inlet, the organic solvent spray section are equipped with above first spray unit in the clear water spray section
In the last one spray unit above be equipped with purified gas gas outlet；
Spray head I in clear water spray section, which connect with clear water pipeline and is equipped with flow control valve I, controls I flow of spray head,
Spray head II in the lye spray section controls II flow of spray head with lye piping connection and equipped with flow control valve II,
Spray head III in the organic solvent spray section controls spray head with organic solvent piping connection and equipped with flow control valve III
III flow；
Each spray section bottom is equipped with leakage fluid dram and communicates with drain pipe, and drain pipe is equipped with fluid level control valve.
Further, it is equipped with vertical spray bucket at the top of each spray unit, the spray bucket upper end closed, top pass through institute
It states and is connected to adjacent spray unit communicating pipe；Spray head is located at the top of the spray bucket, sprays the lower end opening of bucket and is located at
The ullage of spray liquid.
Further, the spray bucket lower part is built-in with packing layer, the hollow many-sided ball of filling in packing layer.
Further, purified gas gas outlet position is equipped with pressure control valve.
Further, liquidometer is equipped with outside the clear water spray section, lye spray section and organic solvent spray section.
Further, the sprayed tank passes through wired earth；It is set outside the lye spray section and organic solvent spray section
Set insulating layer；The baffle is gas distribution baffle, and the partition is the plate by preservative treatment.
It is a kind of for purifying the washing methods of biogas, include the following steps:
S1: being passed through the clear water spray section in sprayed tank for biogas, and first in first spray unit, biogas is certainly
Lower and upper by spray bucket, spray head sprays clear water in spray bucket from top to bottom, after biogas and clear water come into full contact with, into
Enter next spray unit to repeat the above process, subsequently into lye spray section；
S2: in lye spray section, successively passing through each spray unit, and in each spray unit, and biogas is certainly
Lower and upper by spray bucket, spray head sprays lye in spray bucket from top to bottom, and biogas comes into full contact with lye, then
Into organic solvent spray section；
S3: in organic solvent spray section, successively pass through each spray unit, and in each spray unit, biogas
From bottom to top by spray bucket, spray head sprays organic solvent in spray bucket from top to bottom, and biogas is filled with organic solvent
Tap touching, then auto purification gas gas outlet comes out, the biogas after being purified.
Further, lye used in the lye spray section includes that methyldiethanolamine solution and sodium hydroxide are molten
Liquid, and the pH value of the lye, between 10-12, temperature is 50-60 DEG C.
Preferably, alkali liquid temperature used in the lye spray section is 55 DEG C.
Further, organic solvent used in the organic solvent spray section is the n-tetradecane that purity is 98%,
Temperature is 10-20 DEG C.
The present invention purifies biogas by using three sections of spray washing methods, remove dust in biogas, hydrogen sulfide,
Carbon dioxide and siloxanes, the biogas being purified, the removal efficiency of siloxanes is up to 90% or more, hydrogen sulfide and titanium dioxide
The removal efficiency of carbon is more than 97%；By a tank multistage, realize that the washing of a variety of purposes carries out in same tank body, it is effective to contract
The small volume of sprayed tank, reduces occupied area, saves investment；And there is operating condition letter compared with the existing methods
The single, advantages such as processing cost is low.The present invention is of great significance to reduction atmosphere pollution, Optimization of Energy Structure.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
In figure:
1. sprayed tank, 11. clear water spray sections, 12. lye spray sections, 13. organic solvent spray sections, 14. liquid levels, 1a. are former
Expect gas air inlet, 1b. purified gas gas outlet；
2. baffle；
3. partition；
4. spraying bucket, 41. packing layers, 42. communicating pipes；
51. spray head I, 52. spray heads II, 53. spray heads III；
61. clear water pipeline, 62. lye pipelines, 63. organic solvent pipelines；
71. flow control valve I, 72. flow control valves II, 73. flow control valves III；
8. drain pipe, 81. fluid level control valves.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of for purifying the wash mill of biogas, including horizontal sprayed tank 1, before sprayed tank 1
After be divided into clear water spray section 11, lye spray section 12 and organic solvent spray section 13, adjacent spray section by partition 3 every
It opens, and two spray units are at least arranged in each spray section；The bottom memory spray liquid of each spray section, under clear water spray section 11
Portion stores clear water, 12 bottom memory lye of lye spray section, 13 bottom memory organic solvent of organic solvent spray section；Adjacent spray
It drenches and is equipped with baffle 2 between unit, 2 top of baffle is fixed on 1 top of sprayed tank, lower end is located at below the liquid level 14 of spray liquid, from
And the gas-insulated of spray unit is come；Spray head is equipped with above each spray unit, spray head sprays liquid, and sprays single
First top with adjacent spray unit by being connected to communicating pipe 42；Due to being provided with multiple spray units, these spray units point
Multiple air ventilation passages are cut out, stroke of the gas in sprayed tank 1 is increased, repeatedly spray operation are formed, to reach better
Gas purifying effect；
Unstripped gas air inlet 1a is equipped with above first spray unit in clear water spray section 11, in organic solvent spray section 13
The last one spray unit above be equipped with purified gas gas outlet 1b；In the embodiment that Fig. 1 is provided, each spray section is provided with
Two spray units, organic solvent spray section 13 is in order to guarantee second spray unit, i.e., the last one spray unit is effective
Property, purified gas gas outlet 1b is kept apart with second spray unit by baffle 2；It in addition to this, can also directly will most
Communicating pipe 42 derived from the latter spray unit communicates with purified gas gas outlet 1b；
Spray head I 51 in clear water spray section 11 connect with clear water pipeline 61 and is equipped with the control spray of flow control valve I 71
First I 51 flow, the spray head II 52 in lye spray section 12 connect with lye pipeline 62 and are equipped with flow control valve II 72 and control
The flow of spray head II 52 processed, the spray head III 53 in organic solvent spray section 13 connect and are equipped with organic solvent pipeline 63
The flow of the control spray head III 53 of flow control valve III 73；A spray head, each spray head are equipped in i.e. each spray unit
There is flow control valve to control its flow, in the embodiment that Fig. 1 is provided, if there are two spray units, it is extra to be arranged in order to prevent
Flow control valve cause to waste, a flow control valve can be set in the corresponding main line in each spray section,
One flow control valve is set in one of them bye-pass connecting with single spray head, both can control the stream of main line in this way
Amount, also can control the flow of bye-pass；
Each spray section bottom is equipped with leakage fluid dram and communicates with drain pipe 8, and drain pipe 8 is equipped with fluid level control valve 81, leads to
Cross control fluid level control valve 81, to control the height of liquid level 14 in each spray section so that 2 lower end of baffle be located at liquid level 14 with
Under.
Biogas raw material is injected into clear water spray section 11 by unstripped gas air inlet 1a, it is successively therethrough each
Spray unit, in each spray unit, spray head I 51 sprays clear water, removes the dust in gas, most of hydrogen sulfide, lacks
Measure carbon dioxide and minute quantity siloxanes；Then biogas is reinjected into lye spray section 12, successively therethrough each
Spray unit, in each spray unit, spray head II 52 spray lye, remove biogas in remaining hydrogen sulfide, two
Carbonoxide and a small amount of siloxanes；Last biogas enters organic solvent spray section 13, and successively each spray therethrough is single
Member, in each spray unit, spray head III 53 sprays organic solvent, removes the remaining siloxanes in biogas, the silicon oxygen
Alkane includes hexamethyldisiloxane (L2), octamethyltrisiloxane (L3), decamethyl tetrasiloxane (L4), three silicon oxygen of pregnancy basic ring
Alkane (D3), octamethylcy-clotetrasiloxane (D4), decamethylcyclopentaandoxane (D5), ten diformazan basic rings, six siloxanes (D6)；Finally,
Biogas after being purified, and exported from purified gas gas outlet 1b.
In order to improve spray washing effect, further, as shown in Figure 1, being equipped with vertical spray at the top of each spray unit
Bucket 4 is drenched, 4 upper end closed of spray bucket, top with adjacent spray unit by being connected to communicating pipe 42；Spray head is located at the spray
The top of bucket 4 sprays open and 14 top of liquid level positioned at spray liquid in the lower end of bucket 4；Using such design, biogas
Enter in spray bucket 4 from the lower end of spray bucket 4, adjust spray head, the spraying range of spray head is made to cover the transversal of spray bucket 4
Face, spray head spray spray liquid, gas and spray liquid reverse flow from top to bottom, spray liquid can be greatly improved to dust or gas
Assimilation effect.
In order to further improve the assimilation effect of spray liquid, spray 4 lower part of bucket is built-in with packing layer 41, packing layer 41
The characteristics of hollow many-sided ball of interior filling, hollow many-sided ball have high cycle speed, and blade is more, and resistance is small, large specific surface area, can make gas-liquid
It exchanges more abundant.
Further, the position purified gas gas outlet 1b is equipped with pressure control valve, so as to control gas in sprayed tank 1
Pressure keeps gas-liquid exchange abundant.
Further, liquidometer is equipped with outside clear water spray section 11, lye spray section 12 and organic solvent spray section 13, it can
To be used to observe 14 height of liquid level of the waste liquid of each spray pars infrasegmentalis.
Further, thus sprayed tank 1 prevents the generation of electrostatic by wired earth.Lye spray section 12 with it is organic molten
Insulating layer is set outside agent spray section 13, insulation effect is played to spray liquid.Baffle 2 is gas distribution baffle, and partition 3 carries out at anti-corrosion
Reason.
The present invention also provides a kind of for purifying the washing methods of biogas, and this method can be filled based on above-mentioned washing
It sets, other wash mills can also be used, included the following steps:
S1: biogas is passed through the clear water spray section 11 in sprayed tank 1, first in first spray unit, biomass
Gas is from bottom to top by spray bucket 4, and spray head I 51 sprays clear water in spray bucket 4 from top to bottom, and biogas is abundant with clear water
It after contact, is repeated the above process into next spray unit, removes the dust in gas in this process, major part vulcanizes
Hydrogen, a small amount of carbon dioxide and minute quantity siloxanes；Wherein clear water can use tap water, and temperature is room temperature；Subsequently into
Lye spray section 12；
S2: in lye spray section 12, successively pass through each spray unit, and in each spray unit, biogas
From bottom to top by spray bucket 4, spray head II 52 sprays lye in spray bucket 4 from top to bottom, and biogas is abundant with lye
Contact removes remaining hydrogen sulfide, carbon dioxide and a small amount of siloxanes in biogas；Subsequently into organic solvent spray section
13；
S3: in organic solvent spray section 13, successively pass through each spray unit, and in each spray unit, biomass
For gas from bottom to top by spray bucket 4, spray head III 53 sprays organic solvent in spray bucket 4 from top to bottom, biogas with have
Solvent comes into full contact with, and removes the remaining siloxanes in biogas, then auto purification gas gas outlet 1b comes out, after obtaining purification
Biogas.
Further, lye used in lye spray section 12 includes that methyldiethanolamine solution and sodium hydroxide are molten
Liquid, and the pH value of the lye, between 10-12, temperature is 50-60 DEG C, it is preferred that uses 55 DEG C；It in practice, can be by methyl
Diethanolamine solution and sodium hydroxide solution adjust respective ratio, obtain solution of the pH value between 10-12 by mixing,
It is heated to 50-60 DEG C, carries out spray operation, the lye assimilation effect is more preferable.
Further, organic solvent used in organic solvent spray section 13 is the n-tetradecane that purity is 98%, temperature
Degree is 10-20 DEG C, more preferable to the assimilation effect of siloxanes under the state of temperature.
The present invention purifies biogas by using three sections of spray washing methods, remove dust in biogas, hydrogen sulfide,
Carbon dioxide and siloxanes, the biogas being purified, the removal efficiency of siloxanes is up to 90% or more, hydrogen sulfide and titanium dioxide
The removal efficiency of carbon is more than 97%；By a tank multistage, realize that the washing of a variety of purposes carries out in same tank body, it is effective to contract
The small volume of sprayed tank 1, reduces occupied area, saves investment；And there is operating condition letter compared with the existing methods
The single, advantages such as processing cost is low.The present invention is of great significance to reduction atmosphere pollution, Optimization of Energy Structure.
With reference to embodiments and Fig. 1 the present invention will be described again.
By concentration of hydrogen sulfide 58mg/Nm3, siloxane concentrations 158mg/Nm3, carbon dioxide volumn concentration be 35%
Biogas the clear water spray section 11 of sprayed tank 1 is passed through by the unstripped gas air inlet 1a of sprayed tank 1, in gas distribution baffle and liquid level
Under 14 barrier effect, biogas enters filler by 4 bottom of spray bucket in first spray unit of clear water spray section 11
Layer 41, clear water pass through the ejection of spray head I 51 that spray 4 top of bucket is arranged in, gas and spray liquid shape via flow control valve I 71
At adverse current.It is washed by the clear water that first spray unit sprays, by the biogas of first time washing, into second
Spray unit carries out second and washs, and subsequently into lye spray section 12, absorbs dust, most of hydrogen sulfide, a small amount of dioxy
The clear water for changing carbon and minute quantity siloxanes is deposited on the lower part liquid collection section of sprayed tank 1, with partition 3 by itself and other spray liquids point
It cuts, when 14 height of liquid level of the liquid collection section of clear water spray section 11 reaches setting value, fluid level control valve 81 is opened, and will be absorbed
The clear water of impurity is discharged and recycles；It should be noted that when, the height of liquid level 14 is maintained to the top of gas distribution baffle lower end always.
The mixed liquor of methyldiethanolamine solution solution and sodium hydroxide solution passes through setting via flow control valve II 72
Spray head II 52 in the middle spray bucket 4 of 12 first spray units of lye spray section sprays, with the biology entered by lower part
Matter gas forms adverse current, carries out alkali liquid washing, enters after two spray units of the biogas by lye spray section 12 organic molten
Agent spray section 13.The lye for absorbing impurity is deposited on the liquid collection section of lye spray section 12, and via 81 row of fluid level control valve
It removes and recycles.
N-tetradecane is via flow control valve III 73 by being arranged in 13 first spray units of organic solvent spray section
The spray head III 53 sprayed in bucket 4 sprays, and further washs the biogas entered by lower part, removes remaining siloxanes.Through
Biogas after crossing the two spray unit washings of n-tetradecane spray section is discharged by purified gas gas outlet 1b, is deposited on organic molten
The n-tetradecane of 13 liquid collection section of agent spray section is excluded and is recycled via fluid level control valve 81.
After siloxanes completes purification in sprayed tank 1 in biogas, hydrogen sulfide stripping rate 98.18%, carbon dioxide de
Except rate 99.24%, the extrusion rate of siloxanes is 90.68%.
Claims (10)
1. a kind of for purifying the wash mill of biogas, it is characterised in that: including horizontal sprayed tank (1), sprayed tank (1)
Front and back is divided into clear water spray section (11), lye spray section (12) and organic solvent spray section (13), adjacent spray section by
Partition (3) separates, and two spray units are at least arranged in each spray section；The bottom memory spray liquid of each spray section is adjacent
Spray unit between be equipped with baffle (2), baffle (2) top is fixed at the top of the sprayed tank (1), lower end is located at spray liquid
Below liquid level (14)；Spray head is equipped with above each spray unit, and top passes through communicating pipe (42) and adjacent spray list
Member connection；
It is equipped with unstripped gas air inlet (1a) above first spray unit in the clear water spray section (11), the organic solvent spray
It drenches above the last one spray unit in section (13) and is equipped with purified gas gas outlet (1b)；
Spray head I (51) in clear water spray section (11) connect with clear water pipeline (61) and is equipped with flow control valve I (71) and controls
Spray head I (51) flow, the spray head II (52) in the lye spray section (12) connect with lye pipeline (62) and are equipped with stream
Control valve II (72) controls spray head II (52) flow, the spray head III (53) in the organic solvent spray section (13) with have
Solvent pipeline (63), which connects and is equipped with flow control valve III (73), controls spray head III (53) flow；
Each spray section bottom is equipped with leakage fluid dram and communicates with drain pipe (8), and drain pipe (8) is equipped with fluid level control valve (81).
2. according to claim 1 a kind of for purifying the wash mill of biogas, it is characterised in that: each spray is single
First top is equipped with vertical spray bucket (4), and spray bucket (4) upper end closed, top pass through the communicating pipe (42) and adjacent
Spray unit connection；Spray head is located at the top of the spray bucket (4), sprays the lower end opening of bucket (4) and is located at the liquid of spray liquid
Above face (14).
3. according to claim 2 a kind of for purifying the wash mill of biogas, it is characterised in that: the spray bucket
(4) lower part is built-in with packing layer (41), the hollow many-sided ball of filling in packing layer (41).
4. feature exists according to claim 1 to a kind of for purifying the wash mill of biogas described in 3 any one
In: the purified gas gas outlet position (1b) is equipped with pressure control valve.
5. feature exists according to claim 1 to a kind of for purifying the wash mill of biogas described in 3 any one
In: liquidometer is equipped with outside the clear water spray section (11), lye spray section (12) and organic solvent spray section (13).
6. feature exists according to claim 1 to a kind of for purifying the wash mill of biogas described in 3 any one
In: the sprayed tank (1) passes through wired earth；Setting is protected outside the lye spray section (12) and organic solvent spray section (13)
Warm layer, the baffle (2) are gas distribution baffle, and the partition (3) is the plate by preservative treatment.
7. a kind of for purifying the washing methods of biogas, which comprises the steps of:
S1: biogas is passed through the clear water spray section (11) in sprayed tank (1), first in first spray unit, biomass
For gas from bottom to top by spray bucket (4), spray head I (51) sprays clear water in spray bucket (4) from top to bottom, biogas and clear
It after water comes into full contact with, is repeated the above process into next spray unit, subsequently into lye spray section (12)；
S2: in lye spray section (12), successively passing through each spray unit, and in each spray unit, and biogas is certainly
Lower and upper by spray bucket (4), spray head II (52) sprays lye, biogas and lye in spray bucket (4) from top to bottom
It comes into full contact with, subsequently into organic solvent spray section (13)；
S3: in organic solvent spray section (13), successively pass through each spray unit, and in each spray unit, biogas
From bottom to top by spray bucket (4), spray head III (53) sprays organic solvent, biogas in spray bucket (4) from top to bottom
It is come into full contact with organic solvent, then auto purification gas gas outlet (1b) comes out, the biogas after being purified.
8. according to claim 9 a kind of for purifying the washing methods of biogas, it is characterised in that: the lye spray
Lye used in leaching section (12) includes methyldiethanolamine solution and sodium hydroxide solution, and the pH value of the lye is 10-
Between 12, temperature is 50-60 DEG C.
9. according to claim 10 a kind of for purifying the washing methods of biogas, it is characterised in that: the lye
Alkali liquid temperature used in spray section (12) is 55 DEG C.
10. according to claim 9 or 10 a kind of for purifying the washing methods of biogas, it is characterised in that: described
Organic solvent used in organic solvent spray section (13) is the n-tetradecane that purity is 98%, and temperature is 10-20 DEG C.
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| CN201811245036.0A CN109233929A (en) | 2018-10-24 | 2018-10-24 | It is a kind of for purifying the wash mill and washing methods of biogas |
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