CN101703870A - Bio-gas two-stage normal-pressure decarbonization device - Google Patents
Bio-gas two-stage normal-pressure decarbonization device Download PDFInfo
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- CN101703870A CN101703870A CN200910212439A CN200910212439A CN101703870A CN 101703870 A CN101703870 A CN 101703870A CN 200910212439 A CN200910212439 A CN 200910212439A CN 200910212439 A CN200910212439 A CN 200910212439A CN 101703870 A CN101703870 A CN 101703870A
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- Prior art keywords
- packed tower
- tower
- filler
- absorption liquid
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005262 decarbonization Methods 0.000 title claims abstract description 15
- 238000010521 absorption reaction Methods 0.000 claims abstract description 51
- 239000007788 liquid Substances 0.000 claims abstract description 42
- 238000012856 packing Methods 0.000 claims description 14
- 230000008929 regeneration Effects 0.000 claims description 11
- 238000011069 regeneration method Methods 0.000 claims description 11
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 claims description 8
- 229940043276 diisopropanolamine Drugs 0.000 claims description 8
- ZZVUWRFHKOJYTH-UHFFFAOYSA-N diphenhydramine Chemical compound C=1C=CC=CC=1C(OCCN(C)C)C1=CC=CC=C1 ZZVUWRFHKOJYTH-UHFFFAOYSA-N 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- GIAFURWZWWWBQT-UHFFFAOYSA-N 2-(2-aminoethoxy)ethanol Chemical compound NCCOCCO GIAFURWZWWWBQT-UHFFFAOYSA-N 0.000 claims description 4
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 4
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 4
- JLCHNBRGUPQWKF-UHFFFAOYSA-J [OH-].[C+4].[OH-].[OH-].[OH-] Chemical compound [OH-].[C+4].[OH-].[OH-].[OH-] JLCHNBRGUPQWKF-UHFFFAOYSA-J 0.000 claims description 4
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 4
- 229940043237 diethanolamine Drugs 0.000 claims description 4
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 claims description 4
- 239000000945 filler Substances 0.000 abstract description 14
- 230000001172 regenerating effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- 230000009102 absorption Effects 0.000 description 43
- 238000000034 method Methods 0.000 description 21
- 238000005261 decarburization Methods 0.000 description 17
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 14
- 239000007789 gas Substances 0.000 description 13
- 229910002092 carbon dioxide Inorganic materials 0.000 description 7
- 239000001569 carbon dioxide Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- Gas Separation By Absorption (AREA)
Abstract
The invention relates to a bio-gas two-stage normal-pressure decarbonization device which is characterized by at least comprising filler towers (1) formed by overlapping through two stages, wherein the bottom of the filler tower (1) positioned at a bottom layer is provided with a bio-gas inlet (2) and a bottom layer absorption liquid regenerative cycle outlet (7), the filler tower (1) positioned at a top layer is provided with a bio-gas outlet (3), the upper part of a filler layer (6) of each filler tower (1) is provided with an absorption liquid spraying pipe (8), a baffle plate is arranged between the adjacent filler towers (1), an air elevation pipe (5) which is communicated with the adjacent filler towers (1) is arranged on the baffle plate (4) in a penetrating way, a liquid drop hole is arranged on the baffle plate (4) and is connected with a liquid drop pipe (9) which introduces absorption liquid settled on the baffle plate out of the filler towers, and the liquid drop pipe (9) extends out of the filler towers (1) from the bottoms of the adjacent filler towers (1) or the bottom of the filler tower (1) at the bottom layer. The invention features simple structure, convenient manufacture and low cost.
Description
Technical field
The present invention relates to a kind of environmental protection equipment, especially a kind of decarbonization device, specifically a kind of bio-gas two-stage normal-pressure decarbonization device that is used for the biogas decarburization.
Background technology
As everyone knows, in biogas such as biogas, digestion gas, rubbish landfill gas, the carbon dioxide that contains content from tens percent to fifties percent, from biogas with carbon dioxide eliminating, both can increase fuel gas content, improve the combustion gas quality, be convenient to again the carbon dioxide after separating is recycled, reduce greenhouse gas emission.
Decarburization technique commonly used at present has solvent absorption and pressure swing adsorption method, and wherein solvent absorption becomes an important method in the decarburization field because separating effect is thorough, few, the low power consumption and other advantages of the fuel gas component amount of diffusing.Existence needs improved problem but this technology is using all: absorption process commonly used at present is the hydramine decarbonization process, it derives from the sour gas decarburization technique in the chemical industry, because the operation of the absorptive unit in original technology is worked under middle press strip spare, and when being applied to the biogas decarburization, because the flow of biogas is generally little, if adopt supercharging technology then to cause the higher problem of operation energy consumption, if under normal pressure, absorb decarburization, cause the volume on absorption tower excessive again, cause cost of investment to increase.
Therefore, develop the device that is applicable to the biogas decarburization that carries out decarburization under a kind of normal pressure and have crucial meaning.
Summary of the invention
The objective of the invention is at the biogas flow is little can not use in the problem of pressure-off carbon, design a kind of bio-gas two-stage normal-pressure decarbonization device that can under normal pressure, use.
Technical scheme of the present invention is:
A kind of bio-gas two-stage normal-pressure decarbonization device, it is characterized in that it is made up of the packed tower 1 that the secondary closed assembly forms at least, the bottom that wherein is positioned at the packed tower 1 of bottom is provided with biogas air inlet 2 and bottom regeneration of absorption solution loop exit 7, the packed tower 1 that is positioned at top layer is provided with biogas gas outlet 3, top at the packing layer 6 of each packed tower 1 is provided with absorption liquid shower 8, be provided with dividing plate 4 between the adjacent packed tower 1, be coated with the air-lift tube 5 that is communicated with adjacent packed tower 1 on the dividing plate 4, have liquid reducing hole on the dividing plate 4, liquid reducing hole is connected with draws the downspout 9 of packed tower with being deposited in absorption liquid on the dividing plate, described downspout 9 from the bottom of adjacent packed tower 1 or the bottom of underfilling tower 1 stretch out outside the packed tower 1 and link to each other with the regeneration cycle device.
The quantity of described packed tower 1 is two, wherein lower floor's packed tower 1 is the highly basic decarbonizing tower, employed absorption liquid be at least hydroxide carbon or wet chemical in a kind of, upper strata packed tower 1 is the hydramine decarbonizing tower, and employed absorption liquid is at least a kind of in monoethanolamine, diethanol amine, triethanolamine, N methyldiethanol amine, diisopropanolamine (DIPA) or the diglycolamine.
Beneficial effect of the present invention:
The present invention adopts two-stage (also can be multistage) decarbonization process, the decarburization of highly basic method is adopted in the prime decarburization, the hydramine method is adopted in back level decarburization. and the highly basic method has decarburization effect preferably under normal pressure, but its regeneration energy consumption is higher, and the decarburization effect of hydramine method is lower under normal pressure, but the regeneration energy consumption is lower, by the decarburization load of reasonable distribution at this two-stage decarbonization process, normal-pressure decarbonization is had satisfy the cost and the decarburization effect of using value, and this decarburization absorption process is integrated in the cover absorption tower device.
The present invention is simple in structure, and is easily manufactured, and cost is low.
The present invention adopts double fluid, twin-stage decarbonization process based on different carbon-dioxide absorbents applicable to biogas such as biogas, digestion gas, rubbish landfill gas, and this technology is integrated in the cover absorption tower device, can carry out decarburization and absorb under condition of normal pressure.
In order to be implemented in double fluid, the twin-stage absorption process under the normal pressure, the structure on absorption tower is a two-stage structure up and down, be the packed tower structure of routine in every grade of absorptive unit.Be provided with dividing plate, air-lift tube and downcomer means between the two-stage uptake zone up and down, the gas of process subordinate uptake zone enters sheaf space on the dividing plate by air-lift tube, and enters the higher level uptake zone by screen.The spray liquid of higher level uptake zone compiles on dividing plate and collects discharge absorption tower separately by downspout.So just having formed in two uptake zones and sprayed the independent operation that absorbs, be independent of each other, is again the environment of all working under normal pressure simultaneously, can regulate two absorptions loads in the uptake zone easily.
The absorption liquid of underfilling tower can adopt the high carbon-dioxide absorbent of regeneration temperature, can hydroxide carbon or wet chemical in one or both.The absorption liquid of upper strata packed tower can adopt a kind of or mixture in monoethanolamine, diethanol amine, triethanolamine, N methyldiethanol amine, diisopropanolamine (DIPA), the diglycolamine equal solvent.
Absorption tower of the present invention is at normal pressure or add and depress, and can both guarantee to adopt the independent absorption work of biabsorption liquid, double absorbing region.
Description of drawings
Fig. 1 is a workflow schematic diagram of the present invention.
Fig. 2 is a structural representation of the present invention.
The specific embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
As shown in Figure 2.
A kind of bio-gas two-stage normal-pressure decarbonization device, it is made up of the packed tower 1 that the secondary closed assembly forms at least, the two-layer structure that adopts among Fig. 2, present embodiment is that example is illustrated with two layers of packed tower, structure more than two layers can be by that analogy, the bottom that wherein is positioned at the packed tower 1 of bottom is provided with biogas air inlet 2 and bottom regeneration of absorption solution loop exit 7, the packed tower 1 that is positioned at top layer is provided with biogas gas outlet 3, top at the packing layer 6 of each packed tower 1 is provided with absorption liquid shower 8, its at the middle and upper levels the absorption liquid of 8 ejections of the absorption liquid shower in the packed tower 1 can be monoethanolamine, diethanol amine, triethanolamine, N methyldiethanol amine, the combination of one or more in diisopropanolamine (DIPA) or the diglycolamine, the absorption liquid of absorption liquid shower 8 ejection in lower floor's packed tower 1 can be hydroxide carbon or wet chemical in a kind of or two various.Packing layer 6 in the packed tower 1 is positioned in the tower body by screen 10, the filler of packing layer 6 is that conventional fillers (can adopt the board-like structured packing of wavy metal, the wire netting structured packing, the Pall ring random packing, the Raschig ring random packing, the cascade ring random packing, the spherical heap landfill filler that looses), the top of packing layer 6 is provided with charge door 11, the bottom is provided with discharge port 12, be provided with dividing plate 4 between the adjacent packed tower 1, be coated with the air-lift tube 5 that is communicated with adjacent packed tower 1 on the dividing plate 4, have liquid reducing hole on the dividing plate 4, liquid reducing hole is connected with draws the downspout 9 of packed tower with being deposited in absorption liquid on the dividing plate, described downspout 9 from the bottom of adjacent packed tower 1 or the bottom of underfilling tower 1 stretch out outside the packed tower 1 and link to each other with the regeneration cycle device.As shown in Figure 1, downspout 9 is directly drawn outside the tower from the bottom of underfilling tower.
Absorption liquid 1 (bottom absorption liquid among Fig. 1) is as the carbon dioxide absorption liquid in the one-level absorption process, absorption liquid 2 (Fig. 1 upper strata absorption liquid) conduct is the carbon dioxide absorption liquid in the secondary absorption process, have and enter the one-level uptake zone by air-lift tube and efflux after mixing and carry out thermal regeneration on a small quantity when absorption liquid 2 absorbs back (being called rich solution 2) through spray with absorption liquid 1 (becoming rich solution 1) after working, because for the 1 thermal regeneration temperature height of the rich solution in the one-level absorption process, the rich solution 2 that can guarantee to fall in the one-level uptake zone is used by abundant regeneration cycle. specific implementation process, the absorption liquid that sprays in the packing area, upper strata may not be collected in the upper strata regenerating unit of getting back among Fig. 2 fully, have small amount of liquid and fall into the lower floor packing area by the gas channel between last layer absorption tower and the following layer absorption tower, and with enter in lower floor's regenerating unit after the absorption liquid of lower floor packing area mixes, this part absorption liquid that falls into lower floor is regenerated do not exert an influence and this situation occurs, technological process is as shown in Figure 1.
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (2)
1. bio-gas two-stage normal-pressure decarbonization device, it is characterized in that the packed tower (1) that it is formed by the secondary closed assembly at least forms, the bottom that wherein is positioned at the packed tower (1) of bottom is provided with biogas air inlet (2) and bottom regeneration of absorption solution loop exit (7), the packed tower (1) that is positioned at top layer is provided with biogas gas outlet (3), top at the packing layer (6) of each packed tower (1) is provided with absorption liquid shower (8), be provided with dividing plate (4) between the adjacent packed tower (1), be coated with the air-lift tube (5) that is communicated with adjacent packed tower (1) on the dividing plate (4), dividing plate has liquid reducing hole on (4), liquid reducing hole is connected with draws the downspout (9) of packed tower with being deposited in absorption liquid on the dividing plate, and described downspout (9) stretches out outside the packed tower (1) from the bottom of adjacent packed tower (1) or the bottom of underfilling tower (1).
2. bio-gas two-stage normal-pressure decarbonization device according to claim 1, the quantity that it is characterized in that described packed tower (1) is two, wherein lower floor's packed tower (1) is the highly basic decarbonizing tower, employed absorption liquid be at least hydroxide carbon or wet chemical in a kind of, upper strata packed tower (1) is the hydramine decarbonizing tower, and employed absorption liquid is at least a kind of in monoethanolamine, diethanol amine, triethanolamine, N methyldiethanol amine, diisopropanolamine (DIPA) or the diglycolamine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910212439A CN101703870A (en) | 2009-11-11 | 2009-11-11 | Bio-gas two-stage normal-pressure decarbonization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910212439A CN101703870A (en) | 2009-11-11 | 2009-11-11 | Bio-gas two-stage normal-pressure decarbonization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101703870A true CN101703870A (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910212439A Pending CN101703870A (en) | 2009-11-11 | 2009-11-11 | Bio-gas two-stage normal-pressure decarbonization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101703870A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10077407B2 (en) * | 2012-08-09 | 2018-09-18 | Wuhan Kaidi Engineering Technology Research Institute Co., Ltd. | Method and system for recycling carbon dioxide from biomass gasification |
| CN111841255A (en) * | 2020-07-28 | 2020-10-30 | 高京拴 | Flue gas desulfurization device for environment-friendly production |
-
2009
- 2009-11-11 CN CN200910212439A patent/CN101703870A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10077407B2 (en) * | 2012-08-09 | 2018-09-18 | Wuhan Kaidi Engineering Technology Research Institute Co., Ltd. | Method and system for recycling carbon dioxide from biomass gasification |
| CN111841255A (en) * | 2020-07-28 | 2020-10-30 | 高京拴 | Flue gas desulfurization device for environment-friendly production |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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Open date: 20100512 |