CN114100355A - Separation and trapping technology for carbon dioxide in lime kiln waste gas - Google Patents
Separation and trapping technology for carbon dioxide in lime kiln waste gas Download PDFInfo
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- CN114100355A CN114100355A CN202111440456.6A CN202111440456A CN114100355A CN 114100355 A CN114100355 A CN 114100355A CN 202111440456 A CN202111440456 A CN 202111440456A CN 114100355 A CN114100355 A CN 114100355A
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- 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
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- 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
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
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- 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
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- 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
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- 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
- B01D53/84—Biological processes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/07—Preparation from the hydroxides
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C5/00—Fertilisers containing other nitrates
- C05C5/02—Fertilisers containing other nitrates containing sodium or potassium nitrate
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B01D—SEPARATION
- B01D2251/00—Reactants
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- B01D2251/604—Hydroxides
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- 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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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
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Abstract
The invention discloses a lime kiln waste gas carbon dioxide separation and trapping technology which comprises an upper scrubbing tower, a lower cooling tower and a support, wherein a liquid inlet funnel is arranged at the top of the upper scrubbing tower, a first control valve is arranged at the bottom of the liquid inlet funnel, a scrubbing solution gathering layer is arranged at the bottom of the upper scrubbing tower, and a porous leaching cover is fixedly arranged in the upper scrubbing tower and above the scrubbing solution gathering layer. According to the lime kiln waste gas carbon dioxide separation and capture technology, a neutralization reactor is counted, a product solution is introduced into the neutralization reactor, dilute nitric acid is dripped to neutralize the cost of sodium hydroxide in the product solution, the product solution is released after the pH value to be detected reaches a standard value, sodium carbonate and sodium nitrate salt components are contained in the product solution at the moment and can be directly released to enter a nutrient solution layer to provide a carbon source and a nitrogen source required by growth for plants, so that the problem of product waste is solved, the lime kiln waste gas carbon dioxide separation and capture technology is suitable for different working conditions, and a better use prospect is brought.
Description
Technical Field
The invention relates to the technical field of carbon energy conservation and emission reduction, in particular to a technology for separating and trapping carbon dioxide in lime kiln waste gas.
Background
The carbon capture and sequestration technology is an emerging technology which has the large-scale reduction of carbon dioxide emission and reduces the carbon dioxide emission when using fossil energy, and captures and safely stores the carbon dioxide generated in the industrial production process in a specific resistant structure, reduces the emission to the atmosphere, reduces the accumulation of greenhouse gases in the atmosphere and accordingly slows down global climate change; the existing lime kiln can generate a large amount of gas dust and carbon dioxide emissions in the process of producing lime, the conventional method utilizes alkaline washing at present, but the problem of more storage exists, firstly, the waste gas has high-temperature performance, water evaporation can be caused due to high temperature during alkaline washing, the alkaline washing effect is influenced, secondly, the alkaline washing efficiency is limited due to the fact that carbon dioxide is difficult to dissolve in liquid, according to statistics of latest scientific research achievements of enterprises of China, the alkaline washing efficiency can only ensure 41% -68% of carbon dioxide absorption rate in the waste gas, if the cost required by deliberate improvement is large, actual processing conditions are not met, salt products after third alkaline washing cannot be reasonably utilized, certain raw material waste is caused, and therefore, a lime kiln waste gas carbon dioxide separation and trapping technology is provided.
Disclosure of Invention
The invention mainly aims to provide a separation and capture technology of carbon dioxide in lime kiln waste gas, which can effectively solve the problems in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
the separation and capture technology for the carbon dioxide in the lime kiln waste gas comprises an upper scrubbing tower, a lower cooling tower and a support, wherein a liquid inlet funnel is arranged at the top of the upper scrubbing tower, a first control valve is arranged at the bottom of the liquid inlet funnel, a scrubbing solution gathering layer is arranged at the bottom of the upper scrubbing tower, a perforated leaching cover is fixedly arranged in the upper scrubbing tower and above the scrubbing solution gathering layer, a hydraulic pump is fixedly arranged on the inner side of the upper scrubbing tower, the hydraulic pump extends downwards to the position of the scrubbing solution gathering layer through a suction pipe, a communicating pipe is arranged at the position, which is higher than the scrubbing solution gathering layer, of the upper scrubbing tower, and a second control valve is arranged at the top of the communicating pipe;
the bottom of the communicating pipe is communicated with a cooling lower tower, one side of the cooling lower tower extends into a waste gas pipe, the waste gas pipe is positioned in the middle of the cooling lower tower and extends to the bottom of the tower, an isolation seat is movably arranged in the cooling lower tower in a manner of being attached to the tower wall, a shaft sleeve acting on the center of the isolation seat is fixed on the waste gas pipe, a clamping groove is formed in the upper end of the isolation seat, a rotary seat is placed in the clamping groove, upper air hole groups are uniformly formed in the rotary seat, lower air hole groups are arranged in the clamping groove in a penetrating manner, two groups of air cylinders are symmetrically arranged in the support, a lifting rod on each air cylinder is fixed with the bottom of the isolation seat, and a cooling liquid gathering layer is arranged in an area above the rotary seat;
a gas washing liquid delivery pipe is installed on one side of the gas washing solution gathering layer and is communicated with the top of the neutralization reactor through the gas washing liquid delivery pipe, a third control valve is installed at one end of the gas washing liquid delivery pipe, an acid cylinder is fixed on the upper portion of the neutralization reactor, a dropper is arranged at the bottom of the acid cylinder, the bottom of the neutralization reactor is communicated with a manual sealing pool through a reaction liquid delivery pipe, and a fourth control valve is arranged at the position, located on the neutralization reactor, of the reaction liquid delivery pipe;
the top one side of tower is provided with the waste gas pipe on the washing gas, the position that the waste gas pipe is located the tower on the washing gas is provided with the fifth control valve, the bottom in artifical sealed pond is provided with the nutrient solution layer, it has a plurality of groups aquatic plant to plant more than the nutrient solution layer, the part more than the aquatic plant is the gas exchange layer, the top in artifical sealed pond is provided with the lighting lamp group.
Preferably, the scrubbing solution aggregation layer is internally provided with a sodium hydroxide diluted solution, the concentration of the sodium hydroxide diluted solution can be adjusted according to actual waste gas, the water outlet pipe of the hydraulic pump is positioned above the porous leaching cover, and a plurality of groups of drip holes are uniformly formed in the porous leaching cover.
Preferably, the swivel mount rotates around the center of the exhaust pipe in the clamping groove, and the upper air hole group and the lower air hole group are aligned in the rotating process to form a communication state.
Preferably, the two groups of lifting rods synchronously drive the isolation seat to move up and down, a waste gas cooling cavity is formed in the area below the isolation seat, and low-temperature cooling water is arranged in the cooling liquid gathering layer.
Preferably, the upper and lower angular positions of the side of the lower cooling tower are respectively provided with a water inlet and a water outlet.
Preferably, dilute nitric acid with the concentration of 4mol/L is filled in the acid cylinder, a sixth control valve is arranged in the dropping pipe, and all the control valves are electromagnetic valves and are electrically controlled.
Preferably, the top of the manual sealing pool is provided with a detector which is responsible for detecting and displaying the pH value in the neutralization reactor and the concentration of carbon dioxide at the gas exchange layer, and the gas in the manual sealing pool can be released after the concentration of the carbon dioxide is lower than a standard value.
Preferably, the nutrient solution layer comprises salts containing a carbon source, a nitrogen source and a phosphorus source, and trace elements containing magnesium, iron, calcium and potassium.
The invention provides a separation and capture technology of carbon dioxide in lime kiln exhaust gas by improving, compared with the prior art, the invention has the following remarkable improvements and advantages:
(1) designing a cooling lower tower, wherein an exhaust gas pipe is positioned in a cooling liquid gathering layer and fully contacted with cooling water, the gas is cooled in the first step in the moving process, the gas enters a waste gas cooling cavity at the bottommost part and is temporarily stored, the gas is gathered more and more in the storage process, and the gas is only separated from the cooling liquid gathering layer at the upper part, so that the temperature is cooled in the second step in the temporary storage process, then a rotary seat is rotated, the upper gas hole group and the lower gas hole group are aligned to form a communicated state, so that the gas at the bottom can overflow upwards along the gas holes and enter the cooling water to be cooled in the third step, and the sulfur-containing gas in the exhaust gas is absorbed by the water in the contact process with the cooling water; through the three-step cooling technology, the heat in the waste gas is effectively absorbed, and the sulfur-containing gas in the waste gas is removed, so that the subsequent alkali washing is facilitated.
(2) The alkaline washing tower is designed, the scrubbing solution, namely the sodium hydroxide diluted solution, is repeatedly pumped by a hydraulic pump on the basis of the cooling tower and is conveyed to the upper surface of the porous leaching cover, the porous leaching cover downwards forms a leaching water curtain which is fully contacted with the waste gas to absorb the carbon dioxide gas contained in the waste gas.
(3) Design neutralization reactor, lead into the product solution in the neutralization reactor, through the dilute nitric acid of dropwise add, neutralize the sodium hydroxide cost in the product solution, wait to detect after the pH value reaches the standard value, release the product solution, be sodium carbonate, sodium nitrate salt composition in the product solution this moment, can directly release and enter into the nutrient solution layer, for the plant provides the required carbon source of growth and nitrogen source, thereby solve the extravagant problem of product, also reduce the breed cost simultaneously.
(4) The artificial sealed pool is designed, the treated waste gas is discharged into the pool, wherein the carbon dioxide is used for photosynthesis of the aquatic plants, so that the effect of carbon capture and solid storage is achieved, and the absorption rate of the carbon dioxide in the waste gas is integrally ensured to be more than 90%.
(5) The whole treatment process is simple in design and convenient to operate, meets the actual use standard, reduces the production cost, improves the working efficiency, and has a better use effect compared with the traditional mode.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the technology for separating and capturing carbon dioxide from lime kiln exhaust gas according to the present invention;
FIG. 2 is an internal view of an upper scrubber tower and a lower cooler tower according to the lime kiln exhaust gas carbon dioxide separation and capture technology of the present invention;
FIG. 3 is an exploded view of an isolation seat for a lime kiln exhaust gas carbon dioxide separation and capture technology of the present invention;
FIG. 4 is an internal view of a lime kiln exhaust gas carbon dioxide separation capture technology neutralization reactor of the present invention;
FIG. 5 is an internal view of a manual sealing tank for the lime kiln exhaust gas carbon dioxide separation and capture technology.
In the figure: 1. washing the gas and feeding the gas to a tower; 2. cooling the lower tower; 3. a support; 4. a liquid inlet funnel; 5. a first control valve; 6. a scrubbing solution accumulation layer; 7. a porous leaching cover; 8. a hydraulic pump; 9. a suction tube; 10. a communicating pipe; 11. a second control valve; 12. an exhaust gas pipe; 13. an isolation seat; 14. a shaft sleeve; 15. a card slot; 16. rotating; 17. an upper gas hole group; 18. a lower gas hole group; 19. a cylinder; 20. a lifting rod; 21. a coolant accumulation layer; 22. a water outlet; 23. a scrubbing liquid delivery pipe; 24. a neutralization reactor; 25. a third control valve; 26. an acid cylinder; 27. a dropper; 28. a reaction liquid delivery pipe; 29. manually sealing the pool; 30. a fourth control valve; 31. an exhaust gas conduit; 32. a fifth control valve; 33. a nutrient solution layer; 34. an aquatic plant; 35. a gas exchange layer; 36. a set of lighting lamps; 37. a detector; 38. a water inlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-5, the technology for separating and capturing carbon dioxide from lime kiln exhaust gas comprises an upper scrubbing tower 1, a lower cooling tower 2 and a support 3, wherein a liquid inlet funnel 4 is arranged at the top of the upper scrubbing tower 1 and used for adding alkali liquor, a first control valve 5 is arranged at the bottom of the liquid inlet funnel 4, a scrubbing solution gathering layer 6 is arranged at the bottom of the upper scrubbing tower 1, a porous scrubbing cover 7 is fixedly arranged in the upper scrubbing tower 1 and above the scrubbing solution gathering layer 6, a hydraulic pump 8 is fixedly arranged on the inner side of the upper scrubbing tower 1, the hydraulic pump 8 extends downwards to the position of the scrubbing solution gathering layer 6 through a suction pipe 9, a communicating pipe 10 is arranged at the position, which is higher than the scrubbing solution gathering layer 6, of the upper scrubbing tower 1, and a second control valve 11 is arranged at the top of the communicating pipe 10;
the bottom of the communicating pipe 10 is communicated with the cooling lower tower 2, one side of the cooling lower tower 2 extends into the waste gas pipe 12, the waste gas pipe 12 is positioned in the middle of the cooling lower tower 2 and extends to the bottom of the tower, an isolation seat 13 is movably arranged inside the cooling lower tower 2 in a manner of being attached to the tower wall, a shaft sleeve 14 acting on the center of the isolation seat 13 is fixed on the waste gas pipe 12, a clamping groove 15 is formed in the upper end of the isolation seat 13, a rotary seat 16 is arranged in the clamping groove 15, an upper air hole group 17 is uniformly formed in the rotary seat 16, a lower air hole group 18 is arranged in the clamping groove 15 in a penetrating manner, two groups of air cylinders 19 are symmetrically arranged inside the support 3, a lifting rod 20 on each air cylinder 19 is fixed with the bottom of the isolation seat 13, a cooling liquid gathering layer 21 is arranged in an area above the rotary seat 16, and sealing rings are adopted for processing the outer part and the inner gap of the isolation seat 13;
a gas washing liquid outlet pipe 23 is arranged on one side of the gas washing solution gathering layer 6 and is communicated with the top of the neutralization reactor 24 through the gas washing liquid outlet pipe 23, a third control valve 25 is arranged at one end of the gas washing liquid outlet pipe 2, an acid cylinder 26 is fixed on the upper part of the neutralization reactor 24, a dropper 27 is arranged at the bottom of the acid cylinder 26, the bottom of the neutralization reactor 24 is communicated with a manual sealing pool 29 through a reaction liquid outlet pipe 28, and a fourth control valve 30 is arranged at the position, located on the neutralization reactor 24, of the reaction liquid outlet pipe 28;
a waste gas guide pipe 31 is arranged on one side of the top of the upper gas washing tower 1, a fifth control valve 32 is arranged at the position, located on the upper gas washing tower 1, of the waste gas guide pipe 31, a nutrient solution layer 33 is arranged at the bottom of the artificial sealed pool 29, a plurality of groups of aquatic plants 34 are planted above the nutrient solution layer 33, the part above the aquatic plants 34 is a gas exchange layer 35, and a lighting lamp group 36 is arranged at the top of the artificial sealed pool 29 and is used for providing light energy required by plant growth;
the scrubbing solution gathering layer 6 is internally provided with a sodium hydroxide diluted solution, the concentration can be adjusted according to actual waste gas, a water outlet pipe of the hydraulic pump 8 is positioned above the porous leaching cover 7, a plurality of groups of drip holes are uniformly formed in the porous leaching cover 7, and gas can also have an absorption effect when passing through the drip holes; the rotary seat 16 rotates around the center of the waste gas pipe 12 in the clamping groove 15, and the upper air hole group 17 and the lower air hole group 18 are aligned in the rotating process to form a communicating state; the two groups of lifting rods 20 synchronously drive the isolation seat 13 to move up and down, a waste gas cooling cavity is formed in the area below the isolation seat 13, and low-temperature cooling water is arranged in the cooling liquid accumulation layer 21; the upper and lower angular positions of the side of the lower cooling tower 2 are respectively provided with a water inlet 38 and a water outlet 22 for replacing cooling water; dilute nitric acid with the concentration of 4mol/L is filled in the acid cylinder 26, a sixth control valve is arranged in the dropper 27, and all the control valves are electromagnetic valves and are electrically controlled; the detector 37 is arranged at the top of the manual sealing pool 29 and is responsible for detecting and displaying the pH value in the neutralization reactor 24 and the concentration of carbon dioxide at the gas exchange layer 35, and the gas in the manual sealing pool 29 can be released after the concentration of the carbon dioxide is lower than a standard value; the nutrient solution layer 33 comprises salt substances containing a carbon source, a nitrogen source and a phosphorus source, and trace elements containing magnesium, iron, calcium and potassium; because the upper air hole group 17 and the lower air hole group 18 are aligned, cooling water is poured into the waste gas cooling cavity, after waste gas is treated, the lifting rod 20 is used for driving the isolation seat 13 to descend to the bottom, cooling water is pressed up, the upper air hole and the lower air hole are separated by the swivel base 16, the sealing effect is achieved, and the isolation seat 13 ascends again to form the waste gas cooling cavity.
It should be noted that, the invention is a lime kiln exhaust gas carbon dioxide separation and trapping technology, when in use, the exhaust gas entering the exhaust gas pipe 12 is dedusted by the deduster, the exhaust gas pipe 12 is located in the cooling liquid aggregation layer 21 and fully contacted with the cooling water, the gas is cooled in the first step during the moving process, then the gas enters the exhaust gas cooling cavity at the bottommost and is temporarily stored, the gas is more and more gathered during the storage process, meanwhile, because the gas is only separated from the upper cooling liquid aggregation layer 21 by a plate, the temperature is cooled in the second step during the temporary storage process, then the rotary seat 16 is rotated, the upper gas hole group 17 and the lower gas hole group 18 are aligned to form a communication state, so that the gas at the bottom can overflow upwards along the gas holes and enter the cooling water to obtain the temperature reduction in the third step, and the sulfur-containing gas in the exhaust gas is absorbed by the water during the contact with the cooling water, then, the waste gas enters the upper gas washing tower 1 through the communicating pipe 10, the washing solution, namely the sodium hydroxide diluted solution, is repeatedly sucked through the hydraulic pump 8 in the upper gas washing tower 1 and is conveyed to the upper surface of the porous washing cover 7, the porous washing cover 7 downwards forms a washing water curtain which is fully contacted with the waste gas to absorb the carbon dioxide gas contained in the waste gas, then the fifth control valve 32 is opened, the waste gas uniformly enters the artificial sealed pool 29 from the waste gas conduit 31 and moves at the gas exchange layer 35, the carbon dioxide in the waste gas is used for photosynthesis of the aquatic plants 34, so that the effect of carbon capture and solid storage is achieved, and the treated waste gas in the artificial sealed pool 29 can be released after the carbon dioxide concentration of the artificial sealed pool 29 to be detected is reduced to a standard discharge value; because the consideration to the alkali washing gas efficiency, can add excessive sodium hydroxide dilute solution in the tower, this just leads to the alkali in the product solution after the washing gas is excessive, be alkaline, open third control valve 25, lead to the product solution in neutralization reactor 24, through dropwise add dilute nitric acid, neutralize the sodium hydroxide cost in the product solution, after the pH value after detecting reaches the standard value, release the product solution, be sodium carbonate, the sodium nitrate salt composition in the product solution this moment, can directly release and enter into nutrition liquid layer 33, provide required carbon source and the nitrogen source of growth for the plant, thereby solve the extravagant problem of product.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The separation and capture technology of the carbon dioxide in the lime kiln waste gas is characterized in that: comprises an upper scrubbing tower (1), a lower cooling tower (2) and a support (3), wherein the top of the upper scrubbing tower (1) is provided with a liquid inlet funnel (4), a first control valve (5) is installed at the bottom of the liquid inlet funnel (4), a scrubbing solution gathering layer (6) is arranged at the bottom of the scrubbing upper tower (1), a porous leaching cover (7) is fixedly arranged in the upper scrubbing tower (1) and above the scrubbing solution gathering layer (6), a hydraulic pump (8) is fixedly arranged on the inner side of the upper scrubbing tower (1), the hydraulic pump (8) extends downwards to the position of the scrubbing solution accumulation layer (6) through a suction pipe (9), a communicating pipe (10) is arranged at the bottom of the upper scrubbing tower (1) and is higher than the scrubbing solution gathering layer (6), and a second control valve (11) is arranged at the top of the communicating pipe (10);
the bottom of the communicating pipe (10) is communicated with the cooling lower tower (2), one side of the cooling lower tower (2) extends into the waste gas pipe (12), the waste gas pipe (12) is positioned in the middle of the cooling lower tower (2) and extends to the bottom of the tower, the inner part of the cooling lower tower (2) is movably provided with an isolation seat (13) attached to the tower wall, a shaft sleeve (14) acting on the center of the isolation seat (13) is fixed on the waste gas pipe (12), the upper end of the isolation seat (13) is provided with a clamping groove (15), a rotary seat (16) is placed in the clamping groove (15), an upper air hole group (17) is uniformly arranged on the rotary seat (16), a lower air hole group (18) is arranged in the clamping groove (15) in a penetrating manner, two groups of air cylinders (19) are symmetrically arranged in the support (3), and a lifting rod (20) on each air cylinder (19) is fixed with the bottom of the isolation seat (13), a cooling liquid gathering layer (21) is arranged in the area above the rotary seat (16);
a gas washing liquid delivery pipe (23) is installed on one side of the gas washing solution gathering layer (6) and is communicated with the top of the neutralization reactor (24) through the gas washing liquid delivery pipe (23), a third control valve (25) is installed at one end of the gas washing liquid delivery pipe (2), an acid cylinder (26) is fixed on the upper portion of the neutralization reactor (24), a dropper (27) is arranged at the bottom of the acid cylinder (26), the bottom of the neutralization reactor (24) is communicated with a manual sealing pool (29) through a reaction liquid delivery pipe (28), and a fourth control valve (30) is arranged at the position, located on the neutralization reactor (24), of the reaction liquid delivery pipe (28);
the utility model discloses a solar energy water heater, including wash gas upper tower (1), the top one side of wash gas upper tower (1) is provided with waste gas pipe (31), the position that waste gas pipe (31) are located wash gas upper tower (1) is provided with fifth control valve (32), the bottom of artifical sealed pond (29) is provided with nutrient solution layer (33), it has a plurality of groups aquatic plant (34) to plant more than nutrient solution layer (33), the part more than aquatic plant (34) is gas exchange layer (35), the top of artifical sealed pond (29) is provided with lighting lamp group (36).
2. The lime kiln exhaust gas carbon dioxide separation and capture technology of claim 1, characterized in that: the gas washing solution gathering layer (6) is internally provided with a sodium hydroxide diluted solution, the concentration can be adjusted according to actual waste gas, the water outlet pipe of the hydraulic pump (8) is positioned above the porous leaching cover (7), and a plurality of groups of drip holes are uniformly formed in the porous leaching cover (7).
3. The lime kiln exhaust gas carbon dioxide separation and capture technology of claim 2, characterized in that: the rotary seat (16) rotates around the center of the waste gas pipe (12) in the clamping groove (15), and the upper air hole group (17) and the lower air hole group (18) are aligned in the rotating process to form a communicating state.
4. The lime kiln exhaust gas carbon dioxide separation and capture technology of claim 3, characterized in that: the two groups of lifting rods (20) synchronously drive the isolation seat (13) to move up and down, a waste gas cooling cavity is formed in the area below the isolation seat (13), and low-temperature cooling water is arranged in the cooling liquid gathering layer (21).
5. The lime kiln exhaust gas carbon dioxide separation and capture technology of claim 4, wherein: the upper and lower angular positions of the side of the lower cooling tower (2) are respectively provided with a water inlet (38) and a water outlet (22).
6. The lime kiln exhaust gas carbon dioxide separation and capture technology of claim 5, characterized in that: dilute nitric acid with the concentration of (4) mol/L is filled in the acid cylinder (26), a sixth control valve is arranged in the dropper (27), and all the control valves are electromagnetic valves and are electrically controlled.
7. The lime kiln exhaust gas carbon dioxide separation and capture technology of claim 6, wherein: the detector (37) is installed at the top of the manual sealing pool (29) and is responsible for detecting and displaying the pH value in the neutralization reactor (24) and the concentration of carbon dioxide at the gas exchange layer (35), and the gas in the manual sealing pool (29) can be released after the concentration of the carbon dioxide is lower than a standard value.
8. The lime kiln exhaust gas carbon dioxide separation and capture technology of claim 1, characterized in that: the nutrient solution layer (33) comprises salt substances containing a carbon source, a nitrogen source and a phosphorus source, and trace elements containing magnesium, iron, calcium and potassium.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114576550A (en) * | 2022-03-16 | 2022-06-03 | 江西茂盛环境有限公司 | Carbon dioxide comprehensive utilization, trapping and recovery system |
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