CN221244616U - Carbon trapping integrated device - Google Patents
Carbon trapping integrated device Download PDFInfo
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- CN221244616U CN221244616U CN202322882207.3U CN202322882207U CN221244616U CN 221244616 U CN221244616 U CN 221244616U CN 202322882207 U CN202322882207 U CN 202322882207U CN 221244616 U CN221244616 U CN 221244616U
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- Prior art keywords
- carbon
- carbon dioxide
- pipe
- shell
- pipeline
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 48
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 164
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 82
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 82
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000003546 flue gas Substances 0.000 claims abstract description 31
- 238000010521 absorption reaction Methods 0.000 claims abstract description 26
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 239000004568 cement Substances 0.000 claims abstract description 21
- 239000000428 dust Substances 0.000 claims abstract description 14
- 239000006096 absorbing agent Substances 0.000 claims abstract description 3
- 239000012528 membrane Substances 0.000 claims description 40
- 238000000926 separation method Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 17
- 239000000779 smoke Substances 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 11
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 8
- 239000007789 gas Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 5
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009292 forward osmosis Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical group 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The utility model relates to the technical field of carbon capture and utilization, in particular to a carbon capture integrated device, which comprises a heat exchanger and a dust remover which are sequentially connected, wherein an air inlet pipe of the heat exchanger is communicated with an exhaust port of a chimney of a cement kiln; the carbon conversion circuit includes a carbon dioxide absorber. The utility model can solve the technical problem that the existing trapping device has low absorption and utilization rate of carbon dioxide in the flue gas.
Description
Technical Field
The utility model relates to the technical field of carbon trapping and utilization, in particular to a carbon trapping integrated device.
Background
The combustion of fuel and the decomposition of raw materials during cement production can produce a large amount of CO 2, wherein carbon dioxide generated in a cement kiln is a main source, and the emission concentration of CO 2 generated during cement production is even higher than that of boiler flue gas of a coal-fired power plant and accounts for about 12% of the total carbon emission, so that a great challenge is faced in realizing carbon neutralization in the cement industry. In the cement industry, the use of raw material substitution and fuel substitution is considered an important way to reduce carbon emissions from cement, but carbon dioxide emissions from the decomposition of carbonates in clinker are still unavoidable, and thus carbon capture in the cement industry becomes an important "bottom of the way" technique to achieve carbon neutralization in cement.
At present, the carbon dioxide trapping technology in the flue gas can be divided into a plurality of methods such as chemical absorption, physical absorption, membrane separation and the like; the chemical absorption method mainly uses organic amine and the like as an absorbent to separate CO 2 from smoke, for example, chinese patent publication No. CN213725480U discloses a device for capturing and purifying carbon dioxide in cement kiln smoke, which is characterized in that the smoke discharged from a chimney exhaust port of the cement kiln is pretreated to remove particles in the smoke, the smoke is sprayed into a main reaction kettle, carbon dioxide is converted into sodium bicarbonate solution by sodium hydroxide in the main reaction kettle, then the sodium bicarbonate solution is pumped into a carbon dioxide purification tank, and the carbon dioxide is replaced by strong acid reaction.
The device has the following technical problems in the actual use process: the sodium bicarbonate solution is prepared by only reacting the flue gas with absorbent such as sodium hydroxide, so that carbon dioxide in the flue gas is separated out, and the absorption and trapping utilization rate of the carbon dioxide is low; in addition, the subsequent purification treatment or the replacement of carbon dioxide through chemical reaction is needed to be carried out on the sodium bicarbonate, the operation process is complex, the energy consumption is high, and the recycling utilization and conversion rate are low.
Disclosure of utility model
The utility model provides a carbon trapping integrated device, which can solve the technical problem that the existing trapping device has low carbon dioxide absorption and utilization rate in flue gas.
The application provides the following technical scheme:
The carbon trapping integrated device comprises a heat exchanger and a dust remover which are sequentially connected, wherein an air inlet pipe of the heat exchanger is communicated with an exhaust port of a chimney of a cement kiln, an exhaust pipe of the dust remover is communicated with a carbon separation pipeline and a carbon conversion pipeline, the carbon separation pipeline comprises a booster pump, a membrane separator, a compression device and a carbon dioxide storage tank which are sequentially connected, the membrane separator is a carbon dioxide separation membrane, the membrane separator comprises a carbon dioxide-rich air outlet pipe and an exhaust pipe, the carbon dioxide-rich air outlet pipe is connected with the compression device, and the exhaust pipe is connected with the chimney of the cement kiln; the carbon conversion circuit includes a carbon dioxide absorber.
Technical principle and beneficial effect:
1. Through setting up the heat exchanger and can carry out waste heat utilization to chimney exhaust mixed gas, the flue gas after the cooling gets into in the dust remover can avoid the flue gas temperature higher to cause the damage to the low temperature part in the dust remover, then get rid of the tiny particle thing in the flue gas through the dust remover, and the particulate matter blocks up the membrane separator when avoiding carrying out the separation subsequently.
2. The method comprises the steps that through the arrangement of a carbon separation pipeline, the flue gas is sent to a carbon dioxide membrane separator by utilizing a booster pump, carbon dioxide in the flue gas is captured by the membrane separator and gradually enriched on a separation membrane, when the carbon dioxide reaches a certain concentration, the carbon dioxide passes through the separation membrane under the forward osmosis principle, is discharged from a carbon dioxide-enriched air outlet pipe, is compressed by a compression device and is stored in a carbon dioxide storage tank; the gas which is not selected by the membrane separator is discharged from the exhaust pipe and then returned to the cement kiln chimney, and the gas is discharged into the cement kiln chimney again, so that the gas can be recycled, the utilization rate of carbon dioxide in the flue gas is improved, and the carbon emission can be further reduced.
3. By arranging the carbon conversion pipeline and utilizing the carbon dioxide absorption tower to absorb part of carbon dioxide in the flue gas, the treatment load of the membrane separator can be reduced, and the carbon emission can be reduced as well; in addition, carbonate products can be produced by carbonating the absorption liquid in the carbon dioxide absorption tower, so that the direct conversion of carbon dioxide is realized, and the recycling utilization and conversion of carbon dioxide are improved.
Further, a first electric valve, a flowmeter and a pressure gauge are arranged on the carbon separation pipeline, the front end of the first electric valve is used for controlling the smoke amount of the carbon separation pipeline, and the flowmeter and the pressure gauge are arranged at the rear end of the booster pump and used for detecting the smoke flow and the pressure value in the pipeline; the carbon conversion pipeline is provided with a second electric valve, and the front end of the second electric valve is used for controlling the amount of smoke entering the carbon dioxide absorption tower.
The beneficial effects are that: the flowmeter and the pressure gauge are arranged on the carbon separation pipeline and are arranged at the rear end of the booster pump, so that the flow rate and the pressure value of the flue gas in the pipeline can be detected, the pressure and the flow rate of the flue gas entering the membrane separator are ensured to reach required values, and the capture rate of carbon dioxide is improved; through setting up first motorised valve and second motorised valve can select certain pipeline or two pipelines to carry out the carbon entrapment according to flue gas surplus and actual conditions in the chimney to carry out abundant resource utilization to carbon dioxide.
Further, the membrane separator comprises a shell and a plurality of tubular hollow carbon dioxide membranes arranged in the shell, wherein one end of the shell is provided with an air inlet pipe, the other end of the shell is provided with an air outlet pipe, one ends of the air inlet pipe and the air outlet pipe, which are positioned in the shell, are provided with a plurality of branch pipes communicated with the air inlet pipe and the air outlet pipe, the carbon dioxide membranes are arranged on branch pipes at two ends of an inner cavity of the shell, and flue gas passes through the hollow pipes of the carbon dioxide membranes; the carbon dioxide-rich air outlet pipe is arranged on the side wall of the shell.
The beneficial effects are that: the carbon dioxide membranes with the tubular hollows are arranged, and the flue gas passes through the hollow hollows, so that the carbon dioxide capturing efficiency can be improved.
Further, a liquid discharge pipe is arranged at the bottom of the carbon dioxide absorption tower, a switching valve and a delivery pump are sequentially arranged on the liquid discharge pipe, and a water outlet of the liquid discharge pipe is sequentially connected with a heating device and a filtering device.
The beneficial effects are that: the carbon dioxide reacts with the absorption liquid in the absorption tower to generate bicarbonate, then the absorption liquid is pumped into a heating device to heat the absorption liquid to a certain temperature, so that the bicarbonate is decomposed into carbonate, then the solution is filtered by a filtering device, the carbonate and the solution are separated, and the carbonate is dried to obtain a required carbonate product, so that the capture and conversion of the carbon dioxide are realized.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of the membrane separator of FIG. 1.
Detailed Description
The following is a further detailed description of the embodiments:
The labels in the drawings of this specification include: chimney 1, heat exchanger 2, dust remover 3, booster pump 4, first motorised valve 41, manometer 42, flowmeter 43, membrane separator 5, casing 51, carbon dioxide membrane 52, intake pipe 53, exhaust pipe 54, carbon dioxide-rich outlet pipe 55, branch pipe 56, compression device 6, carbon dioxide storage tank 7, carbon dioxide absorption tower 8, second motorised valve 81, switching valve 82, delivery pump 83, heating device 9, filter 10.
Example 1
As shown in fig. 1-2, the carbon trapping integrated device comprises a heat exchanger 2 and a dust remover 3 which are sequentially connected, wherein an air inlet of the heat exchanger 2 is communicated with an air outlet of a chimney 1 of a cement kiln through a pipeline, and flue gas in the air outlet of the chimney 1 of the cement kiln is carbon dioxide, oxygen and nitrogen mixed flue gas after denitration and desulfurization treatment; can carry out waste heat utilization to chimney 1 exhaust mixed gas through setting up heat exchanger 2, the flue gas after the cooling gets into in the dust remover 3 can avoid the flue gas temperature higher to cause the damage to the low temperature part in the dust remover 3, then get rid of the tiny particle thing in the flue gas through the dust remover 3, causes the particulate matter jam when avoiding carrying out the entrapment separation subsequently.
The blast pipe of dust remover 3 has carbon separation pipeline and carbon conversion pipeline through the pipeline intercommunication, and carbon separation pipeline is including the booster pump 4 that connects gradually, membrane separator 5, compression device 6 and carbon dioxide storage tank 7, still is provided with first motorised valve 41, flowmeter 43 and manometer 42 on the carbon separation pipeline of this embodiment, and first motorised valve 41 is located the front end of booster pump 4 and is used for controlling the flue gas volume of carbon separation pipeline, and flowmeter 43 and manometer 42 set up the rear end at booster pump 4 and are arranged in detecting flue gas flow and the pressure value in the pipeline. The membrane separator 5 is a carbon dioxide separation membrane, the membrane separator 5 comprises a carbon dioxide-rich air outlet pipe 55 and an exhaust pipe 54, the carbon dioxide-rich air outlet pipe 55 is connected with the compression device 6, the exhaust pipe 54 is connected with the cement kiln chimney 1, and the flue gas after capturing carbon dioxide is discharged back into the cement kiln chimney 1 again for recycling, so that the utilization rate of carbon dioxide in the flue gas is further improved, and meanwhile, the carbon emission is reduced.
Specifically, as shown in fig. 2, in this embodiment, the membrane separator 5 includes a casing 51 and a plurality of tubular hollow carbon dioxide membranes 52 disposed in the casing 51, the left end of the casing 51 is an air inlet pipe 53, the right end is an air outlet pipe 54, one ends of the air inlet pipe 53 and the air outlet pipe 54 located in the casing 51 are respectively provided with a plurality of communicating branch pipes 56, the plurality of carbon dioxide membranes 52 are disposed on two branch pipes 56 of an inner cavity of the casing 51, mixed flue gas passes through the hollow pipes of the carbon dioxide membranes 52, and unselected gas returns to the chimney 1 from the air outlet pipe 54; carbon dioxide is captured by the membrane and gradually enriched on the membrane, passes through the membrane under the principle of forward osmosis after the carbon dioxide is enriched to a certain concentration, is discharged from a carbon dioxide-enriched air outlet pipe 55, is compressed by a compression device 6 and is stored in a carbon dioxide storage tank 7.
The stored carbon dioxide may be converted to different products by different treatments: for example, carbon dioxide reacts with alkaline substances (such as sodium hydroxide or calcium hydroxide) to generate carbonate, and the carbonate can be used for preparing building materials, sodium bicarbonate or sodium carbonate, and can be used for various industries of national economy such as glass manufacturing, building materials, feed industry and the like, and is taken as a basic chemical raw material; or converting carbon dioxide into a synthetic fuel, such as methane or a liquid fuel, using a chemical reaction; or carbon dioxide is used in chemical reactions to produce chemicals and materials, such as polymers and the like.
The carbon conversion pipeline comprises a carbon dioxide absorption tower 8, and specifically, in the embodiment, an organic amine organic component and an alkaline substance are used as an absorbent, a second electric valve 81 is further arranged on the carbon conversion pipeline, and the second electric valve 81 is positioned at the front end of the carbon dioxide absorption tower 8 and used for controlling the amount of smoke entering the carbon dioxide absorption tower 8; the bottom of the carbon dioxide absorption tower 8 is provided with a liquid discharge pipe, a switching valve 82 and a delivery pump 83 are sequentially arranged on the liquid discharge pipe, and the outlet of the liquid discharge pipe is sequentially connected with a heating device 9 and a filtering device 10. The carbon dioxide reacts with the absorption liquid in the carbon dioxide absorption tower 8 to generate bicarbonate, then the absorption liquid is pumped into the heating device 9 to heat the absorption liquid to a certain temperature, so that the bicarbonate is decomposed into carbonate, the solution is filtered by the filtering device 10, the carbonate and the solution are separated, and the carbonate is dried to obtain the required carbonate product, so that the capture and conversion of the carbon dioxide are realized.
The above is merely an embodiment of the present utility model, and the present utility model is not limited to the field of the present embodiment, but the specific structure and characteristics of the present utility model are not described in detail. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (4)
1. The carbon trapping integrated device is characterized by comprising a heat exchanger and a dust remover which are sequentially connected, wherein an air inlet pipe of the heat exchanger is communicated with an exhaust port of a chimney of a cement kiln, an exhaust pipe of the dust remover is communicated with a carbon separation pipeline and a carbon conversion pipeline, the carbon separation pipeline comprises a booster pump, a membrane separator, a compression device and a carbon dioxide storage tank which are sequentially connected, the membrane separator is a carbon dioxide separation membrane, the membrane separator comprises a carbon dioxide-rich air outlet pipe and an exhaust pipe, the carbon dioxide-rich air outlet pipe is connected with the compression device, and the exhaust pipe is connected with the chimney of the cement kiln; the carbon conversion circuit includes a carbon dioxide absorber.
2. A carbon capture integrated device according to claim 1, wherein: the device comprises a carbon separation pipeline, a booster pump, a first electric valve, a flowmeter and a pressure gauge, wherein the carbon separation pipeline is provided with the first electric valve, the flowmeter and the pressure gauge, the front end of the booster pump is used for controlling the flue gas quantity of the carbon separation pipeline, and the flowmeter and the pressure gauge are arranged at the rear end of the booster pump and are used for detecting the flue gas flow and the pressure value in the pipeline; the carbon conversion pipeline is provided with a second electric valve, and the front end of the second electric valve is used for controlling the amount of smoke entering the carbon dioxide absorption tower.
3. A carbon capture integrated device according to claim 2, wherein: the membrane separator comprises a shell and a plurality of tubular hollow carbon dioxide membranes arranged in the shell, wherein one end of the shell is provided with an air inlet pipe, the other end of the shell is provided with an air outlet pipe, one ends of the air inlet pipe and the air outlet pipe, which are positioned in the shell, are provided with a plurality of branch pipes communicated with the air inlet pipe and the air outlet pipe, the carbon dioxide membranes are arranged on branch pipes at two ends of an inner cavity of the shell, and flue gas passes through the hollow pipes of the carbon dioxide membranes; the carbon dioxide-rich air outlet pipe is arranged on the side wall of the shell.
4. A carbon capture integrated device according to claim 3, wherein: the bottom of the carbon dioxide absorption tower is provided with a liquid discharge pipe, the liquid discharge pipe is sequentially provided with a switch valve and a delivery pump, and a water outlet of the liquid discharge pipe is sequentially connected with a heating device and a filtering device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322882207.3U CN221244616U (en) | 2023-10-25 | 2023-10-25 | Carbon trapping integrated device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322882207.3U CN221244616U (en) | 2023-10-25 | 2023-10-25 | Carbon trapping integrated device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221244616U true CN221244616U (en) | 2024-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322882207.3U Active CN221244616U (en) | 2023-10-25 | 2023-10-25 | Carbon trapping integrated device |
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| Country | Link |
|---|---|
| CN (1) | CN221244616U (en) |
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2023
- 2023-10-25 CN CN202322882207.3U patent/CN221244616U/en active Active
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