CN117504587A - Carbon dioxide trapping device and method - Google Patents
Carbon dioxide trapping device and method Download PDFInfo
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- CN117504587A CN117504587A CN202410022998.9A CN202410022998A CN117504587A CN 117504587 A CN117504587 A CN 117504587A CN 202410022998 A CN202410022998 A CN 202410022998A CN 117504587 A CN117504587 A CN 117504587A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 41
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims description 8
- 238000000926 separation method Methods 0.000 claims abstract description 72
- 238000010521 absorption reaction Methods 0.000 claims abstract description 46
- 230000008929 regeneration Effects 0.000 claims abstract description 38
- 238000011069 regeneration method Methods 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims description 81
- 239000002250 absorbent Substances 0.000 claims description 47
- 230000002745 absorbent Effects 0.000 claims description 47
- 239000007789 gas Substances 0.000 claims description 38
- 239000002440 industrial waste Substances 0.000 claims description 36
- 238000004062 sedimentation Methods 0.000 claims description 34
- 238000012856 packing Methods 0.000 claims description 12
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- 238000001926 trapping method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 11
- 230000009467 reduction Effects 0.000 description 10
- 230000009471 action Effects 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 230000001502 supplementing effect Effects 0.000 description 4
- 238000011049 filling Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 210000005056 cell body Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- 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
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- 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
- B01D53/77—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
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/50—Carbon oxides
- B01D2257/504—Carbon dioxide
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The application relates to a carbon dioxide trapping device and a trapping method, which belong to the field of carbon dioxide trapping and comprise the following steps: the separation device is used for receiving the light phase solution and the heavy phase solution discharged from the absorption tower and separating the light phase solution from the heavy phase solution, so that the light phase solution flows back into the absorption tower and the heavy phase solution flows into the regeneration tower.
Description
Technical Field
The present application relates to the field of carbon dioxide capture, and in particular, to a carbon dioxide capture device.
Background
Along with the development of industrialization, the emission of carbon dioxide is increased, serious pollution is caused to the environment, and the problems of global warming, serious greenhouse effect and the like are caused. In order to reduce carbon dioxide emissions, carbon dioxide capture technology is widely used.
Introducing the industrial tail gas rich in carbon dioxide into an absorption tower, absorbing carbon dioxide in the industrial tail gas by a carbon dioxide absorbent in the absorption tower, sinking the reacted carbon dioxide absorbent into the bottom of the absorption tower, introducing the reacted carbon dioxide absorbent into a regeneration tower, and after the carbon dioxide absorbent is circularly sprayed, heated and regenerated, separating out carbon dioxide in the carbon dioxide absorbent, continuously introducing the carbon dioxide absorbent into the absorption tower, and recycling.
For the related art in the above, there are the following drawbacks: in the absorption tower, due to the problem of reaction efficiency, part of the carbon dioxide absorbent may react with carbon dioxide completely to become a heavy phase solution, and part of the carbon dioxide absorbent may not react with carbon dioxide completely to become a light phase solution, and it should be noted that the light phase solution may still absorb carbon dioxide. Therefore, the light phase solution and the heavy phase solution are all introduced into the regeneration tower for regeneration, so that a large amount of electric energy and steam are additionally consumed, and the concept of sustainable development is deviated.
Disclosure of Invention
In order to solve the problem that the heavy phase solution and the light phase solution are mixed together and all need to be subjected to regeneration treatment, the application provides a carbon dioxide capturing device and a capturing method.
In a first aspect, the present application provides a carbon dioxide capturing device that adopts the following technical scheme:
a carbon dioxide capture device comprising: the device comprises an absorption tower, a separation device and a regeneration tower, wherein the absorption tower, the separation device and the regeneration tower are sequentially communicated, the absorption tower is used for enabling an absorbent to react with industrial waste gas to enable the absorbent to be converted into a light-phase solution and a heavy-phase solution, the separation device is used for receiving the light-phase solution and the heavy-phase solution discharged from the absorption tower and separating the light-phase solution from the heavy-phase solution, the light-phase solution is enabled to flow back into the absorption tower, the heavy-phase solution is enabled to flow into the regeneration tower, and the regeneration tower is used for enabling the heavy-phase solution to be regenerated.
Through adopting above-mentioned technical scheme, separator makes heavy phase solution and light phase solution separation, and light phase solution direct cycle uses, and the regenerator tower only regenerates heavy phase solution, has reduced the consumption of electric energy and steam, and is energy-concerving and environment-protective, agrees with sustainable development's theory mutually.
Optionally: the absorption tower comprises a tower body and a sprayer which is arranged in the tower body and is used for spraying an absorbent, wherein a catcher used for recycling the absorbent is arranged above the sprayer in the tower body, an exhaust hole used for exhausting and purifying industrial waste gas is formed in the top of the tower body, a filling area used for reacting the absorbent with the industrial waste gas is arranged below the sprayer in the tower body, and an air inlet pipe used for introducing the industrial waste gas is arranged below the filling area on one side of the tower body.
Through adopting above-mentioned technical scheme, the spray thrower sprays the absorbent in the tower body evenly, the absorbent evenly diffuses in the packing district, industrial waste gas passes the intake pipe and gets into in the tower body, industrial waste gas passes the packing district, meet with the absorbent, industrial waste gas and absorbent react in the packing district, the absorbent is converted into heavy phase solution and light phase solution, heavy phase solution and light phase solution flow to the tower body bottom, heavy phase solution and light phase solution preliminary layering in the tower body bottom, the industrial waste gas after being purified passes the exhaust hole and discharges, can carry partial absorbent in the industrial waste gas, the trapper retrieves the absorbent, the processing is high-efficient, thoroughly.
Optionally: the separation device comprises a speed reducing tank, a baffling tank and a sedimentation tank which are sequentially communicated, wherein the speed reducing tank, the baffling tank and the sedimentation tank are used for accelerating the separation of light phase solution and heavy phase solution, the speed reducing tank is communicated with the bottom of the absorption tower, the bottom of the sedimentation tank is communicated with the regeneration tower through an outer exhaust pipe, the top of the sedimentation tank is communicated with the sprayer through a return pipe, and the regeneration tower is communicated with the return pipe through a supplementing pipe.
Through adopting above-mentioned technical scheme, heavy phase solution and light phase solution preliminary layering in the tower body bottom, heavy phase solution of tower body bottom flows through the deceleration tank in proper order, baffling pond and sedimentation tank, heavy phase solution and light phase solution degree of depth separation, the light phase solution at sedimentation tank top passes the back flow to the shower in, the heavy phase solution of sedimentation tank bottom passes outer calandria and gets into regeneration tower in the back flow, the absorbent after the regeneration passes in proper order and gets into the shower after supplementary pipe and the back flow, separation effect is good, separation efficiency is high.
Optionally: the sedimentation tank comprises a tank body and a baffling coupling separator arranged in the tank body.
By adopting the technical scheme, the baffling coupling separator is formed by overlapping a plurality of folded plates, so that the stroke of the absorbent is increased in a limited space, and on one hand, the space utilization rate is improved; on the other hand, the separation effect of the heavy phase solution and the light phase solution is improved.
Optionally: the absorption tower is communicated with the top of the sedimentation tank through a drainage tube, and one end of the drainage tube, which is close to the absorption tower, is positioned below the filling area.
By adopting the technical scheme, the light phase solution in the absorption tower passes through the drainage tube to quickly flow to the inner top of the sedimentation tank and then flows back into the sprayer, so that the stroke of the light phase solution is shortened, and the treatment efficiency of industrial waste gas is improved.
Optionally: the novel drainage device is characterized in that a drainage plate is arranged in the tower body and positioned between the air inlet pipe and the drainage pipe, the drainage plate gradually inclines downwards from one side close to the drainage pipe to one side far away from the drainage pipe, the drainage plate is abutted to the inner wall of the tower body, and a preset gap is reserved between one side, far away from the drainage pipe, of the drainage plate and the inner wall of the tower body.
By adopting the technical scheme, the heavy phase solution and the light phase solution flow to the bottom of the absorption tower along the drainage plate from one side of the drainage plate away from the drainage tube, so that on one hand, when the heavy phase solution flows through the drainage tube, the heavy phase solution directly flows into the sedimentation tank along the drainage tube, and the separation effect of the heavy phase solution and the light phase solution is improved; on the other hand, the impact on the liquid level near the drainage tube in the tower body when the heavy phase solution and the light phase solution fall is reduced, so that the heavy phase solution can quickly sink, the possibility that the heavy phase solution enters the drainage tube is reduced, and the separation effect of the heavy phase solution and the light phase solution is further improved.
Optionally: and a drainage rod is arranged on one side, far away from the drainage tube, of the drainage plate, and extends to the bottom of the tower body.
By adopting the technical scheme, if the heavy phase solution and the light phase solution flow down along the drainage plate, certain impact is caused on the liquid level, and layering of the heavy phase solution and the light phase solution is affected; the heavy phase solution and the light phase solution fall along the drainage rod, the drainage rod can play a certain buffering role, the impact of the heavy phase solution and the light phase solution on the liquid level is slowed down, and the separation effect of the heavy phase solution and the light phase solution is further improved.
Optionally: the tower body bottom be equipped with the fluid-discharge tube that the tower body is linked together, keep away from on the fluid-discharge tube the one end of tower body be equipped with last branch liquid pipe and the lower branch liquid pipe that the fluid-discharge tube is linked together, go up branch liquid pipe with the cooling down pond top is linked together, lower branch liquid pipe with the cooling down pond bottom is linked together.
By adopting the technical scheme, when the heavy phase solution and the light phase solution flow through the liquid discharge pipe, the heavy phase solution directly enters the bottom of the baffling tank through the lower liquid separation pipe, the light phase solution directly enters the top of the baffling tank through the upper liquid separation pipe, and in the flowing process of the heavy phase solution and the light phase solution, the heavy phase solution and the light phase solution are separated again, and the separation effect and the separation efficiency of the heavy phase solution and the light phase solution are improved.
Optionally: the liquid discharge pipe is internally provided with a liquid separation plate between the upper liquid separation pipe and the lower liquid separation pipe, the liquid separation plate is close to the upper liquid separation pipe and one end of the lower liquid separation pipe is rotationally connected between the upper liquid separation pipe and the lower liquid separation pipe, the liquid discharge pipe is provided with a motor, an output shaft of the motor is connected to one side of the liquid separation plate, a concentration sensor is arranged at a preset height position in the tower body, and a controller is arranged on the tower body and is electrically connected with the motor.
Through adopting above-mentioned technical scheme, concentration inductor installs the predetermined altitude department in the tower body, through the response to the concentration in the tower body to judge the proportion of tower body bottom heavy phase solution and light phase solution, according to the proportion of heavy phase solution and light phase solution, under the control of controller, motor drive divides the liquid board to rotate, thereby control the entry size of upper liquid pipe and lower liquid pipe, thereby make the more thoroughly of heavy phase solution and light phase solution separation, further promoted the separation effect.
In a second aspect, the present application provides a carbon dioxide capture method comprising the steps of:
the absorbent reacts with the industrial waste gas through the absorption tower, and the absorbent is converted into a light phase solution and a heavy phase solution;
separating the heavy phase solution from the light phase solution by the separation device;
refluxing the light phase solution into the absorption tower through the separation device;
flowing a heavy phase solution through the separation device into the regeneration column;
regenerating the heavy phase solution through the regeneration tower and refluxing the heavy phase solution into the absorption tower.
In summary, the present application has the following beneficial effects:
the separation device separates the heavy phase solution from the light phase solution, the light phase solution is directly recycled, the regeneration tower only regenerates the heavy phase solution, the consumption of electric energy and steam is reduced, the energy is saved, the environment is protected, and the concept of sustainable development is met.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present application;
fig. 2 is a cross-sectional view of the overall structure of an embodiment of the present application.
Reference numerals illustrate:
1. an absorption tower; 11. a tower body; 12. a sprayer; 13. a catcher; 14. an exhaust hole; 15. a filler zone; 16. an air inlet pipe; 17. a drainage tube; 18. a drainage plate; 19. a drainage rod; 2. a separation device; 21. a deceleration pool; 22. a baffling pool; 23. a sedimentation tank; 24. an outer tube; 25. a return pipe; 26. a replenishment pipe; 27. a cell body; 28. a baffle coupling separator; 3. a regeneration tower; 4. a liquid discharge pipe; 41. an upper liquid separating pipe; 42. a lower liquid separating pipe; 43. a liquid separation plate; 44. a motor; 45. a concentration sensor; 46. a controller; 51. a filter plate; 52. a heavy phase solution zone; 53. a light phase solution zone; 54. and a circulation pump.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
This embodiment: a carbon dioxide capture device, referring to fig. 1 and 2, comprising: the device comprises an absorption tower 1, a separation device 2 and a regeneration tower 3, wherein the absorption tower 1, the separation device 2 and the regeneration tower 3 are communicated in sequence. The absorption tower 1 is used for reacting the absorbent with industrial waste gas to convert the absorbent into a light phase solution and a heavy phase solution, the separation device 2 is used for receiving and separating the light phase solution and the heavy phase solution, the light phase solution flows back into the absorption tower 1 for direct recycling, the heavy phase solution flows into the regeneration tower 3, the regeneration tower 3 only needs to regenerate the heavy phase solution, the consumption of electric energy and steam is reduced, the energy is saved, the environment is protected, the concept of sustainable development is compatible, and the regenerated heavy phase solution flows back into the absorption tower 1 for recycling.
Wherein the absorption tower 1 comprises a tower body 11 and a sprayer 12 installed in the tower body 11 near the top for spraying the absorbent. A catcher 13 for recovering the absorbent is arranged above the sprayer 12 in the tower body 11. A filter plate 51 for filtering industrial waste gas is installed above the catcher 13 in the tower 11. The top of the tower body 11 is provided with an array exhaust hole 14 for exhausting the purified industrial waste gas.
A packing area 15 for the reaction of the absorbent and the industrial waste gas is arranged below the sprayer 12 in the tower body 11, the packing area 15 is divided into three layers altogether, and the number of layers of the packing area 15 can be adjusted according to actual conditions. An air inlet pipe 16 for introducing industrial waste gas is fixedly connected to the left side of the tower body 11 below the packing area 15.
The industrial waste gas passes through the air inlet pipe 16 and enters the tower 11, and the industrial waste gas rises along the tower 11. The spray 12 sprays the absorbent into the tower 11, and the absorbent descends and is uniformly dispersed in the packing region 15. When the industrial waste gas enters the packing region 15, the absorbent reacts with the industrial waste gas, and the absorbent is converted into a heavy phase solution and a light phase solution, which descend along the tower 11. The purified industrial waste gas continues to rise through the packing area 15, the catcher 13 recovers the absorbent carried in the industrial waste gas, the filter plate 51 carries out secondary filtration on the industrial waste gas, and the industrial waste gas finally passes through the exhaust hole 14 to be discharged.
The tower body 11 is fixedly connected with a drainage plate 18, the drainage plate 18 is located below the air inlet pipe 16, the drainage plate 18 gradually inclines downwards from one side far away from the air inlet pipe 16 to one side close to the air inlet pipe 16, the whole drainage plate 18 is in a 45-degree inclined state, the periphery of the drainage plate 18 is abutted to the inner wall of the tower body 11, and a preset gap is reserved between one side, close to the air inlet pipe 16, of the drainage plate 18 and the inner wall of the tower body 11. In addition, a drainage rod 19 is fixedly connected to one side, close to the air inlet pipe 16, of the drainage plate 18, the drainage rod 19 is vertically downward, and the drainage rod 19 extends to the bottom of the tower body 11.
The heavy phase solution and the light phase solution which descend along the tower body 11 fall onto the drainage plate 18, continue to descend along the drainage plate 18, and finally flow to the bottom of the tower body 11 along the drainage rod 19. The heavy phase solution and the light phase solution slowly fall down along the drainage plate 18 and the drainage rod 19, so that the impact on the bottom of the tower body 11 is slowed down, and the layering of the heavy phase solution and the light phase solution at the bottom of the tower body 11 is facilitated. The heavy phase solution forms a heavy phase solution zone 52 at the bottom of the column 11 and the light phase solution forms a light phase solution zone 53 at the bottom of the column 11.
The separation device 2 comprises a speed reduction tank 21, a baffling tank 22 and a sedimentation tank 23 which are sequentially communicated and positioned on the right side of the absorption tower 1, wherein the speed reduction tank 21, the baffling tank 22 and the sedimentation tank 23 are all used for accelerating the separation of the light phase solution and the heavy phase solution. The bottom of the tower body 11 is fixedly connected with a liquid discharge pipe 4 communicated with the tower body 11, the liquid discharge pipe 4 is communicated with a heavy phase solution zone 52, the right end of the liquid discharge pipe 4 is fixedly connected with an upper liquid separation pipe 41 and a lower liquid separation pipe 42 communicated with the liquid discharge pipe 4, the upper liquid separation pipe 41 is parallel to the liquid discharge pipe 4, and the upper liquid separation pipe 41 is communicated with the top of the speed reduction tank 21. The lower liquid separating pipe 42 is in a 45-degree downward inclined state, and the lower liquid separating pipe 42 is communicated with the bottom of the speed reducing tank 21.
Under the action of static pressure, the heavy phase solution at the bottom of the tower body 11 flows into the liquid discharge pipe 4, the mixed light phase solution in the heavy phase solution is separated from the heavy phase solution, the light phase solution passes through the upper liquid separation pipe 41 to directly reach the top of the speed reduction tank 21, and the light phase solution entering the speed reduction tank 21 slowly flows down along the inner wall of the speed reduction tank 21. The heavy phase solution passes through the lower liquid separating pipe 42 and directly reaches the bottom of the speed reducing tank 21, and in the flowing process of the heavy phase solution and the light phase solution, the preliminary separation of the heavy phase solution and the light phase solution is realized, and the separation effect and the separation efficiency are improved. The deceleration tank 21 slows down the flow of the heavy phase solution and the light phase solution, and further separates the heavy phase solution and the light phase solution.
In order to further enhance the separation effect, in the present embodiment, a liquid separation plate 43 is disposed between the upper liquid separation pipe 41 and the lower liquid separation pipe 42 in the liquid discharge pipe 4, and the liquid separation plate 43 divides the liquid discharge pipe 4 into two. One end of the liquid separating plate 43, which is close to the upper liquid separating pipe 41 and the lower liquid separating pipe 42, is rotationally connected between the upper liquid separating pipe 41 and the lower liquid separating pipe 42, a motor 44 is arranged outside the liquid discharging pipe 4, an output shaft of the motor 44 penetrates into the liquid discharging pipe 4, dynamic sealing is adopted between the output shaft and the liquid discharging pipe 4, the end part of the output shaft is fixedly connected to one side of the liquid separating plate 43, a concentration sensor 45 is arranged at a preset height position in the tower body 11, a controller 46 is arranged outside the tower body 11, and the controller 46, the concentration sensor 45 and the motor 44 are electrically connected.
According to the induction result of the concentration sensor 45, the specific gravity of the heavy phase solution and the light phase solution at the bottom of the tower body 11 is determined, the concentration sensor 45 transmits signals to the controller 46, the motor 44 drives the liquid separation plate 43 to rotate under the control of the controller 46, and according to the ratio of the heavy phase solution to the light phase solution, the opening sizes of the upper liquid separation pipe 41 and the lower liquid separation pipe 42 are adjusted, so that the heavy phase solution and the light phase solution more accurately flow into the upper liquid separation pipe 41 or the lower liquid separation pipe 42, and the separation effect of the heavy phase solution and the light phase solution is further improved.
The bottom of the speed reducing tank 21 is communicated with the bottom of the baffling tank 22, the bottom of the baffling tank 22 is communicated with the bottom of the sedimentation tank 23, and the sedimentation tank 23 comprises a tank body 27 and a baffling coupling separator 28 arranged in the tank body 27. The bottom of the sedimentation tank 23 is communicated with the regeneration tower 3 through an outer exhaust pipe 24, the top of the sedimentation tank 23 is communicated with the middle part of the absorption tower 1 through a drainage pipe 17, the right side of the top of the sedimentation tank 23 is communicated with the sprayer 12 through a return pipe 25, and the regeneration tower 3 is communicated with the return pipe 25 through a supplementing pipe 26. The circulation pump 54 is installed on both the outer drain pipe 24 and the return pipe 25.
The heavy phase solution and the light phase solution in the speed reducing tank 21 pass through the baffling tank 22 to enter the sedimentation tank 23, the baffling tank 22 still has the function of increasing the residence time of the heavy phase solution and the light phase solution, the light phase solution in the absorption tower 1 passes through the drainage tube 17 to directly enter the top of the sedimentation tank 23, the heavy phase solution is positioned at the bottom of the sedimentation tank 23 under the action of the baffling coupling separator 28, and the light phase solution is positioned at the top of the sedimentation tank 23. Under the action of the circulating pump 54, the heavy phase solution at the bottom of the sedimentation tank 23 passes through the discharge pipe 24 to enter the regeneration tower 3, the light phase solution at the top of the sedimentation tank 23 passes through the return pipe 25 to enter the sprayer 12, and the heavy phase solution sequentially passes through the supplementing pipe 26 and the return pipe 25 after being regenerated in the regeneration tower 3 and then flows into the sprayer 12.
The embodiment of the application also discloses a carbon dioxide capturing method, which comprises the following steps:
the absorbent is reacted with the industrial waste gas through an absorption tower 1, and the absorbent is converted into a light phase solution and a heavy phase solution;
separating the heavy phase solution from the light phase solution by a separation device 2;
reflux the light phase solution into the absorber column 1 through the separation device 2;
passing the heavy phase solution through a separation device 2 into a regeneration tower 3;
the heavy phase solution is regenerated by the regeneration column 3 and refluxed into the absorption column 1.
The implementation principle of the carbon dioxide capturing device in the embodiment of the application is as follows: the industrial waste gas passes through the air inlet pipe 16 and enters the tower body 11, the sprayer 12 sprays the absorbent into the tower body 11, the absorbent reacts with the industrial waste gas in the packing area 15, the filter plate 51 performs secondary purification on the industrial waste gas, the purified industrial waste gas passes through the exhaust hole 14 and is discharged, the catcher 13 recovers the absorbent carried in the industrial waste gas, the absorbent is converted into a heavy phase solution and a light phase solution after reacting with the industrial waste gas, the heavy phase solution and the light phase solution flow through the flow guiding plate 18 and the flow guiding rod 19 and then fall to the bottom of the tower body 11, the heavy phase solution and the light phase solution are layered at the bottom of the tower body 11, the heavy phase solution forms a heavy phase solution area 52 at the bottom of the tower body 11, and the light phase solution forms a light phase solution area at the bottom of the tower body 11.
The concentration sensor 45 senses the concentration of the heavy phase solution at the bottom of the tower body 11, determines the specific gravity of the heavy phase solution and the light phase solution, the concentration sensor 45 transmits signals to the controller 46, and the motor 44 drives the liquid separation plate 43 to rotate under the control of the controller 46, so that the opening sizes of the upper liquid separation pipe 41 and the lower liquid separation pipe 42 are adjusted. Under the action of static pressure, the heavy phase solution at the bottom of the tower body 11 flows into the liquid discharge pipe 4, the mixed light phase solution in the heavy phase solution flows to the top of the speed reduction tank 21 through the upper liquid separation pipe 41, and the heavy phase solution flows to the bottom of the speed reduction tank 21 through the lower liquid separation pipe 42.
The heavy phase solution and the light phase solution in the speed reduction tank 21 flow through the baffling tank 22 and then enter the sedimentation tank 23, the light phase solution in the middle part of the absorption tower 1 directly flows into the speed reduction tank 21 through the drainage tube 17, the heavy phase solution flows to the bottom of the sedimentation tank 23 under the action of the baffling coupling separator 28, and the light phase solution flows to the top of the sedimentation tank 23. The heavy phase solution flows into the regeneration column 3 through the outer discharge pipe 24 by the circulation pump 54. The light phase solution flows into the sprayer 12 through the return pipe 25, and after being regenerated in the regeneration tower 3, the heavy phase solution sequentially flows into the sprayer 12 through the supplementing pipe 26 and the return pipe 25, and is circulated.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. A carbon dioxide capture device, comprising: absorption tower (1), separator (2) and regeneration tower (3), absorption tower (1) separator (2) and regeneration tower (3) communicate in proper order, absorption tower (1) supplies absorbent and industrial waste gas reaction, makes absorbent change into light phase solution and heavy phase solution, separator (2) are used for receiving the light phase solution and the heavy phase solution of discharging in absorption tower (1) separate, make light phase solution backward flow in absorption tower (1), make heavy phase solution flow to in regeneration tower (3), regeneration tower (3) are used for making heavy phase solution regeneration.
2. A carbon dioxide capture device according to claim 1, wherein: the absorption tower (1) comprises a tower body (11) and a sprayer (12) which is arranged in the tower body (11) and is used for spraying an absorbent, a catcher (13) which is used for recycling the absorbent is arranged above the sprayer (12) in the tower body (11), an exhaust hole (14) which is used for discharging purified industrial waste gas is formed in the top of the tower body (11), a filler area (15) which is used for reacting the absorbent with the industrial waste gas is arranged below the sprayer (12) in the tower body (11), and an air inlet pipe (16) which is used for introducing the industrial waste gas is arranged below the filler area (15) on one side of the tower body (11).
3. A carbon dioxide capture device according to claim 2, wherein: separation device (2) are including the deceleration tank (21), baffling pond (22) and sedimentation tank (23) that are linked together in proper order, deceleration tank (21) baffling pond (22) and sedimentation tank (23) all are used for accelerating the separation of light phase solution and heavy phase solution, deceleration tank (21) with absorption tower (1) bottom is linked together, sedimentation tank (23) bottom through outer calandria (24) with regeneration tower (3) are linked together, sedimentation tank (23) top through back flow (25) with spray thrower (12) are linked together, regeneration tower (3) through supplementary pipe (26) with back flow (25) are linked together.
4. A carbon dioxide capture device according to claim 3, wherein: the sedimentation tank (23) comprises a tank body (27) and a baffling coupling separator (28) arranged in the tank body (27).
5. A carbon dioxide capture device according to claim 3, wherein: the absorption tower (1) is communicated with the top of the sedimentation tank (23) through a drainage tube (17), and one end, close to the absorption tower (1), of the drainage tube (17) is located below the packing area (15).
6. A carbon dioxide capture device according to claim 5, wherein: be equipped with drainage board (18) in tower body (11), drainage board (18) are located intake pipe (16) with between drainage tube (17), drainage board (18) are by being close to one side of drainage tube (17) is kept away from one side of drainage tube (17) is downward sloping gradually, drainage board (18) butt in on the inner wall of tower body (11), drainage board (18) keep away from one side of drainage tube (17) with leave predetermined clearance between the inner wall of tower body (11).
7. The carbon dioxide capture device of claim 6, wherein: a drainage rod (19) is arranged on one side, far away from the drainage tube (17), of the drainage plate (18), and the drainage rod (19) extends to the bottom of the tower body (11).
8. A carbon dioxide capture device according to claim 3, wherein: the tower body (11) bottom be equipped with the fluid-discharge tube (4) that tower body (11) are linked together, keep away from on fluid-discharge tube (4) the one end of tower body (11) be equipped with last branch liquid pipe (41) and the lower branch liquid pipe (42) that fluid-discharge tube (4) are linked together, go up branch liquid pipe (41) with the cooling pond (21) top is linked together, lower branch liquid pipe (42) with cooling pond (21) bottom is linked together.
9. A carbon dioxide capture device according to claim 8, wherein: be located in fluid-discharge tube (4) divide liquid pipe (41) with be equipped with branch liquid board (43) down between branch liquid pipe (42), divide liquid board (43) to be close to go up divide liquid pipe (41) with the one end rotation of dividing liquid pipe (42) down is connected in last minute liquid pipe (41) and down between divide liquid pipe (42), be equipped with motor (44) on fluid-discharge tube (4), the output shaft of motor (44) in divide liquid board (43) one side, predetermined height department is equipped with concentration inductor (45) in tower body (11), be equipped with controller (46) on tower body (11), controller (46) concentration inductor (45) and motor (44) electricity are connected.
10. A carbon dioxide capturing method using a carbon dioxide capturing device according to any one of claims 1 to 9, characterized by comprising the steps of:
reacting the absorbent with the industrial waste gas through the absorption tower (1), and converting the absorbent into a light-phase solution and a heavy-phase solution;
separating the heavy phase solution from the light phase solution by means of the separation device (2);
refluxing the light phase solution into the absorption tower (1) through the separation device (2);
flowing a heavy phase solution into the regeneration column (3) through the separation device (2);
the heavy phase solution is regenerated by the regeneration tower (3) and refluxed into the absorption tower (1).
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