CN115212697A - Amine absorption method for CO 2 Alkaline washing tower for carbon capture - Google Patents
Amine absorption method for CO 2 Alkaline washing tower for carbon capture Download PDFInfo
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- CN115212697A CN115212697A CN202211147673.0A CN202211147673A CN115212697A CN 115212697 A CN115212697 A CN 115212697A CN 202211147673 A CN202211147673 A CN 202211147673A CN 115212697 A CN115212697 A CN 115212697A
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- alkaline washing
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- 238000005406 washing Methods 0.000 title claims abstract description 123
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 23
- 150000001412 amines Chemical class 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000003513 alkali Substances 0.000 claims abstract description 54
- 239000007789 gas Substances 0.000 claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 45
- 239000012895 dilution Substances 0.000 claims abstract description 40
- 238000010790 dilution Methods 0.000 claims abstract description 40
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003546 flue gas Substances 0.000 claims abstract description 19
- 230000002596 correlated effect Effects 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 46
- 239000007921 spray Substances 0.000 claims description 21
- 230000007246 mechanism Effects 0.000 claims description 15
- 239000003518 caustics Substances 0.000 claims description 14
- 239000000945 filler Substances 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000002585 base Substances 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 7
- 238000009434 installation Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 33
- 239000007787 solid Substances 0.000 abstract description 33
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 23
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 2
- 150000003568 thioethers Chemical class 0.000 description 11
- 238000007865 diluting Methods 0.000 description 10
- 239000012670 alkaline solution Substances 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 2
- 230000009919 sequestration Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- PVXVWWANJIWJOO-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-N-ethylpropan-2-amine Chemical compound CCNC(C)CC1=CC=C2OCOC2=C1 PVXVWWANJIWJOO-UHFFFAOYSA-N 0.000 description 1
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 description 1
- -1 alcohol amine Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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Classifications
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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
- B01D53/1431—Pretreatment by other processes
- B01D53/145—Pretreatment by separation of solid or liquid material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- 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
- B01D53/1475—Removing carbon dioxide
-
- 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
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to the technical field of chemical machinery based on automatic control, in particular to an amine absorption method for CO 2 An alkali washing tower for carbon capture is used, wherein a spirally-rising alkali washing cavity is formed in an alkali washing shell, a rich liquid outlet is formed at the lower end of the alkali washing shell, a gas inlet is formed in the side wall of the alkali washing shell, which is close to the rich liquid outlet, a gas flowmeter is installed on the gas inlet, and a gas outlet is formed at the upper end of the alkali washing shell; a dilution valve is arranged on the dilution pipeline; gradually increasing the opening of the dilution valve in the direction away from the gas inlet; based on the gas inflow rate of the flue gas detected by the gas flowmeter, the power of the medium pump and the opening degree of the dilution valve are adjusted, so that the power of the medium pump and the opening degree of the dilution valve are equal to each otherThe flue gas inlet flow rate is positively correlated. The invention has the beneficial effects that: the full absorption of sulfide and solid particles is considered, and the corrosion to the alkaline washing tower is reduced.
Description
Technical Field
The invention relates to the technical field of chemical machinery based on automation and control, in particular to an amine absorption method for CO 2 An alkaline tower for carbon capture.
Background
In recent years, more and more students have considered global warming and sea level elevation to be caused by CO 2 Is initiated by the greenhouse effect of the dominant factor. The international energy agency states that CO can be reduced by increasing energy efficiency and increasing renewable energy production 2 Emissions, but its potential for development is limited. A fund emphasizes the importance of carbon capture and sequestration, and the carbon capture and sequestration technology is adopted globally, so that 50 to 80 percent of the whole world can be solved by 2050CO of 2 The emission is the key to reduce the emission of greenhouse gases.
The amine absorption method (alcohol amine method) is a method of absorbing CO with an aqueous solution of an ethanolamine (such as MEA, DEA, and MDEA) 2 Absorbing CO in 2 Before absorption, sulfides and solid particles in the flue gas need to be absorbed, and at present, the sulfides and the solid particles are generally absorbed by an alkaline washing tower.
The concentration of sulfide and solid particles is gradually reduced along with the ascending of the flue gas in the alkaline tower, and the concentration of the alkaline washing liquid is integrally reduced in order to reduce the corrosion resistance of containers and pipelines of the alkaline tower, which is not beneficial to the absorption of the sulfide and the solid particles; in order to ensure the absorption effect on sulfide and solid particles, the concentration of the alkaline solution is increased, and the corrosion to the system caused by the overlarge concentration of the alkaline solution is intensified.
Therefore, there is a need for an amine absorption process for CO 2 An alkaline washing tower for carbon capture to solve the above problems.
Disclosure of Invention
To solve the above problems, i.e., to understand that corrosion resistance and good CO of the system itself can never be considered 2 The problem of absorption efficiency, the invention provides an amine absorption method for CO 2 A caustic tower for carbon capture comprising:
the device comprises an alkaline washing shell, wherein a spirally-rising alkaline washing cavity is formed in the alkaline washing shell, a rich liquid outlet is formed at the lower end of the alkaline washing shell, a gas inlet is formed in the position, close to the rich liquid outlet, of the side wall of the alkaline washing shell, a gas flowmeter is mounted on the gas inlet, and a gas outlet is formed at the upper end of the alkaline washing shell;
the alkali liquor spraying mechanism comprises dilution pipelines, dilution valves, pipelines, a storage container, a medium pump and alkali liquor spray heads, the storage container, the medium pump and the alkali liquor spray heads are sequentially connected through the pipelines, the alkali liquor spray heads are multiple in number, the alkali liquor spray heads are sequentially arranged at intervals along the spiral direction of the alkali washing cavity, the alkali liquor spray heads are fixed on mounting holes formed in the alkali washing shell, each alkali liquor spray head is connected to a water source through one dilution pipeline, and one dilution valve is mounted on each dilution pipeline;
a controller, wherein a control end of the gas flow meter, a control end of the dilution valve, and a control end of the media pump are in signal connection with the controller, and the controller is configured to:
gradually increasing the opening of the dilution valve in a direction away from the gas inlet;
and adjusting the power of the medium pump and the opening degree of the dilution valve based on the flue gas inlet flow detected by the gas flowmeter so that the power of the medium pump and the opening degree of the dilution valve are positively correlated with the flue gas inlet flow.
The device further comprises a rotating mechanism, wherein the rotating mechanism comprises a plurality of rotating rollers which are rotatably arranged in the alkaline washing cavity, the axis of each rotating roller extends along the radial direction of the alkaline washing cavity, and the rotating rollers are sequentially arranged at intervals along the extending direction of the alkaline washing cavity.
Further, the rotating mechanism further comprises a rolling support, the rolling support is arranged on the rotating roller in a rolling manner, an accommodating groove for accommodating filler is formed in the rolling support, and the depth direction of the accommodating groove is the same as the tangential direction of the alkaline washing chamber;
the mounting hole is formed in the top of the caustic wash housing.
Further, a guide vibration wheel is rotatably arranged on the side wall of the far end of the alkaline washing cavity;
a cam rotatably mounted to a distal end of the rolling support, the cam configured to:
the far end of the cam is tightly propped against the guide vibration wheel; the proximal end of the cam is spaced from the leading vibratory wheel.
Further, an opening is formed in the upper end of the alkaline washing shell for the rolling support to pass through, and a blocking cover is arranged on the opening in an opening and closing mode.
Further, still include fixed stand, unable adjustment base, cantilever bar and supporting beam, wherein:
the lower end of the fixed upright post is fixed on the fixed base;
the bottom of the alkaline washing shell is fixed on the supporting beam;
the two supporting beams are arranged inside and outside and fixed through cantilever rods, and the near ends of the cantilever rods are fixed on the side faces of the stand columns.
Furthermore, the rotating mechanism further comprises a supporting frame, and two ends of the supporting frame are respectively fixed to the two supporting beams;
the middle part of the supporting frame forms a rotating space, and the rotating roller is rotatably arranged in the rotating space.
Further, the installation position of the cam on the rolling bracket can be adjusted along the radial direction of the alkaline cleaning cavity;
the outer edge of the cam comprises an abutting flange, a transition portion and an avoiding portion which are connected in sequence, the abutting flange abuts against the guide vibration wheel when rotating to the axis far away from the alkaline washing cavity, and the distance from the transition portion and the avoiding portion to the rotating axis of the cam is smaller than the distance from the abutting flange to the rotating axis of the cam.
Furthermore, a cam rack is fixed on the rolling support, the cam is rotatably arranged on the cam rack, and a reset torsion spring is further arranged between the cam and the cam rack.
The invention has the beneficial effects that:
in the gas flowing direction (namely gas inlet → gas outlet) in the alkaline washing cavity, sulfide and solid particles in the flue gas flow from bottom to top and are gradually absorbed by alkaline washing liquid flowing from top to bottom (from the alkaline solution nozzle to flow out and then along the direction of the gas outlet → rich liquid outlet) under the action of self weight, so that the concentration of the sulfide and the solid particles is gradually reduced along the gas flowing direction, the concentration of the alkaline washing liquid at the position with high concentration of the sulfide and the solid particles (close to the gas inlet) is high, the concentration of the alkaline washing liquid at the position with low concentration of the sulfide and the solid particles (close to the gas outlet) is low, the concentration of the alkaline washing liquid at the high concentration can meet the requirement of full absorption, the corrosion of the alkaline washing liquid at the low concentration position is reduced, and the full absorption of the sulfide and the solid particles and the corrosion of an alkaline washing tower are both considered;
on the whole, the power of the medium pump and the opening degree of the dilution valve are adjusted based on the inlet flow of the flue gas, so that the flow of the sprayed alkaline solution and the flow of a solvent (water) used for diluting the alkaline solution are adjusted, the flow of the alkaline solution and the concentration of the alkaline solution can keep positive correlation with the inlet flow of the flue gas, and the problems that absorption is influenced due to too little alkaline solution and unnecessary corrosion is caused due to too much alkaline solution are further avoided;
connect two pipelines on every alkali lye shower nozzle respectively, the alkali lye of fixed concentration is carried to first pipeline (the pipeline of connecting storage container and medium pump), the water of diluting the usefulness is carried to second pipeline (dilution pipeline), two pipelines are controlled alone, thereby can correspond the dilution to alkali lye shower nozzle spun alkali lye concentration, with satisfying foretell concentration requirement, alkali lye concentration control range is wide, adjust logic simple (the power of adjusting the medium pump adjusts the alkali lye flow, adjust the flow of the water of diluting the usefulness is adjusted to the aperture of diluting the valve, thereby finally adjust the alkali lye concentration after diluting, it is reliable, take into account foretell sulphide and solid particle matter absorption efficiency and reduce the corruption in order to realize.
Drawings
FIG. 1 is an amine absorption process for CO 2 A schematic perspective view of a first view of an embodiment of the carbon capture caustic tower, wherein the plugging covers at the lower end and the upper end of the caustic washing shell are not shown;
FIG. 2 is an amine absorption CO process 2 A schematic diagram of the caustic wash liquid pipeline of an embodiment of the caustic wash tower for carbon capture;
FIG. 3 is an amine absorption CO process 2 A control block diagram of an embodiment of a carbon capture caustic tower;
FIG. 4 is a schematic representation of an amine absorption process for CO 2 A schematic perspective view of a second viewing angle of an embodiment of the caustic tower for carbon capture;
FIG. 5 is an enlarged view of a portion of the area Z1 of FIG. 4;
FIG. 6 amine absorption CO 2 A schematic three-dimensional structure diagram of a third viewing angle of an embodiment of the alkaline tower for carbon capture;
FIG. 7 is a schematic perspective view of a first viewing angle of an embodiment of a section of a caustic wash housing;
FIG. 8 is an enlarged view of a portion of region Z2 of FIG. 7;
FIG. 9 is an enlarged view of a portion of region Z3 of FIG. 7;
fig. 10 is a schematic view of a cam mounting structure.
In the figure:
1. washing the shell with alkali; 11. washing the cavity with alkali; 12. a rich liquid outlet; 13. a gas inlet; 14. a gas outlet;
21. a storage container; 22. a medium pump; 23. an alkali liquor spray head; 24. a dilution line; 25. a dilution valve;
31. a controller; 32. a gas flow meter;
41. a rotating roller; 42. a rolling support; 43. a guide vibration wheel; 44. a cam; 441. an abutment flange; 442. a transition portion; 443. an avoidance part; 45. a support frame; 451. a rotating space; 46. a cam carrier; 461. mounting a through hole; 47. a camshaft; 48. a nut; 49. a return torsion spring; 410. a bearing;
51. fixing the upright post; 52. a fixed base; 53. a cantilever bar; 54. and supporting the beam.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
Referring to fig. 1 to 10, the embodiment of the invention discloses an amine absorption method for CO 2 A caustic tower for carbon capture comprising:
the device comprises an alkaline washing shell 1, wherein a spirally-rising alkaline washing cavity 11 is formed in the alkaline washing shell, a rich liquid outlet 12 is formed at the lower end of the alkaline washing shell, a gas inlet 13 is formed in the side wall of the alkaline washing shell, which is close to the rich liquid outlet, a gas flowmeter 32 is installed on the gas inlet, and a gas outlet 14 is formed at the upper end of the alkaline washing shell;
the alkali liquor spraying mechanism comprises a dilution pipeline 24, a dilution valve 25, pipelines, a storage container 21, a medium pump 22 and alkali liquor spray heads 23, the storage container, the medium pump and the alkali liquor spray heads are sequentially connected through the pipelines, the alkali liquor spray heads are multiple in number, the alkali liquor spray heads are sequentially arranged at intervals along the spiral direction of the alkali washing cavity, the alkali liquor spray heads are fixed on mounting holes formed in the alkali washing shell, each alkali liquor spray head is connected to a water source through one dilution pipeline, and one dilution valve is mounted on each dilution pipeline;
a controller 31, to which a control end of the gas flow meter, a control end of the dilution valve, and a control end of the media pump are all signal-connected, the controller being configured to:
gradually increasing the opening of the dilution valve in a direction away from the gas inlet;
and adjusting the power of the medium pump and the opening degree of the dilution valve based on the flue gas inlet flow detected by the gas flowmeter so that the power of the medium pump and the opening degree of the dilution valve are positively correlated with the flue gas inlet flow.
In the flowing direction of gas in the alkaline washing cavity (namely gas inlet → gas outlet), the flue gas flows from bottom to top and is gradually absorbed by alkaline washing liquid flowing from top to bottom (from the alkaline washing spray head flowing out and then along the gas outlet → rich liquid outlet direction under the action of self weight), so that the concentration of sulfide and solid particles is gradually reduced along the flowing direction of gas, the concentration of the alkaline washing liquid at the position where the concentration of sulfide and solid particles is high (close to the gas inlet) is high, the concentration of the alkaline washing liquid at the position where the concentration of sulfide and solid particles is low (close to the gas outlet) is low, the concentration of the alkaline washing liquid at the high concentration position can meet the requirement of full absorption, the alkaline washing liquid at the low concentration position is corroded, and the full absorption of sulfide and solid particles and the corrosion to the alkaline washing tower are both considered.
On the whole, the power of the medium pump and the opening degree of the dilution valve are adjusted based on the air inlet flow of the flue gas, so that the flow of the sprayed alkaline liquor and the flow of a solvent (water) used for diluting the alkaline liquor are adjusted, the flow of the alkaline liquor and the concentration of the alkaline liquor can keep positive correlation (direct ratio) with the air inlet flow of the flue gas, and the phenomenon that the absorption is influenced due to too little alkaline liquor and the unnecessary corrosion is caused due to too much alkaline liquor is further avoided.
Connect two pipelines on every alkali lye shower nozzle respectively, the alkali lye of fixed concentration is carried to first pipeline (the pipeline of connecting storage container and medium pump), the water of diluting the usefulness is carried to second pipeline (dilution pipeline), two pipelines are controlled alone, thereby can correspond the dilution to alkali lye shower nozzle spun alkali lye concentration, with satisfying foretell concentration requirement, alkali lye concentration control range is wide, adjust logic simple (adjust the power of medium pump and adjust the alkali lye flow, adjust the flow of the water of diluting the usefulness is adjusted to the aperture of diluting the valve, thereby adjust the alkali lye concentration after diluting finally, it is reliable, take into account the absorption efficiency and the reduction corruption of foretell sulphide and solid particle thing with the realization.
In addition, the controller may be a PLC controller, a computer host, or the like, as long as the control logic for controlling the embodiment of the present invention can be run thereon.
The alkaline washing shell is arranged in a spiral shape, so that the contact area (the surface area of the inner wall of the alkaline washing shell) and the contact time of sulfide and solid particles with alkaline washing liquid are greatly prolonged, and the sulfide and solid particles can be further favorably absorbed. The height of the alkaline washing shell is reduced, and the alkaline washing shell is convenient to assemble and manufacture. In addition, as shown in the figure, the alkali washing shell is formed by multi-section splicing, so that the production, the transportation and the assembly are further facilitated.
Compared with the alkali washing shell which is vertically arranged, the alkali washing shell which is spirally arranged greatly prolongs CO at the same height 2 Compared with the existing alkaline washing tower, the alkaline washing tower can fully absorb sulfide and solid particles on the premise of saving fillers (the fillers have the effect that the alkaline washing liquid is sprayed on the fillers with a porous structure to increase the contact area of the flue gas and the alkaline washing liquid) and filler brackets (have the effects of fixing and supporting the fillers to separate the adjacent fillers), and greatly simplifies equipment on the premise of energy absorption effectThe structure and cost of itself.
The embodiment of the invention can further comprise a rotating mechanism, wherein the rotating mechanism comprises a rotating roller 41 which is rotatably arranged in the alkaline washing cavity, the axis of the rotating roller extends along the radial direction of the alkaline washing cavity, and the rotating rollers are multiple and are sequentially arranged at intervals along the extending direction of the alkaline washing cavity. The rotating roller is blown upwards by the flue gas, and the alkaline washing liquid flows downwards to rotate (precisely, the upward side of the rotating roller rotates downwards due to the fact that the alkaline washing liquid flows from top to bottom), so that the rotation further promotes the contact time and the contact area of the flue gas and the alkaline washing liquid, and the absorption effect of sulfide and solid particles is further guaranteed.
In other embodiments, the rotating mechanism further includes a rolling support 42, the rolling support is rollably disposed on the rotating roller, a containing groove for containing the filler is formed on the rolling support, and the depth direction of the containing groove is the same as the tangential direction of the alkaline washing chamber; the mounting hole is formed in the top of the caustic wash housing.
Under the action of self weight, the rolling bracket rolls on the rotating roller from top to bottom in the alkaline cleaning cavity, and alkaline cleaning liquid (or diluted alkaline cleaning liquid) is sprayed out from the alkaline cleaning spray head and then sprayed onto the rolling bracket and the filler, so that the adsorption effect of sulfide and solid particles is further improved. Meanwhile, the rolling support can bump when rolling on the rotating rollers due to gaps between the adjacent rotating rollers, and the bumping is beneficial to the surface of the rolling support, the inner side wall of the alkaline washing shell and the alkaline washing liquid on the surface of the filler, which adsorbs part of sulfides and solid particles, to flow down, so that a high-concentration alkaline washing liquid left from the upper part of a new (unadsorbed sulfide and solid particles) is saved, the concentration (on the local height) of the sulfides and the solid particles on the surfaces of the rolling support, the inner side wall of the alkaline washing shell and the filler is gradually increased from top to bottom (the concentration of the alkaline washing liquid is gradually reduced from bottom to top on the whole height of the alkaline washing cavity, which is not contradictory), the concentration of the alkaline washing liquid is gradually reduced from top to bottom, and the fast flowing of rich liquid (the alkaline washing liquid which adsorbs the sulfides and the solid particles) and the absorption of the sulfides and the solid particles by the new liquid are facilitated.
In other embodiments, a guide vibration wheel 43 is rotatably mounted on the side wall of the far end of the alkaline washing chamber; rotatably mounted to the distal end of the rolling carriage is a cam 44 configured to: the far end of the cam is tightly abutted against the guide vibration wheel; the proximal end of the cam is spaced from the leading vibratory wheel.
As described above, due to the height difference and the gap between the adjacent rotating rollers, the rolling support will jolt in the vertical direction in the process of rolling from top to bottom, and the motion track in the vertical direction is that the whole body alternately goes up and down from top to bottom and partially along the spiral direction of the alkaline washing chamber; meanwhile, through the arrangement of the cam, the far end of the cam on the transverse direction (the radial direction of the alkaline washing cavity) is in alternate collision with the guide vibration wheel, the collision enables the transverse rolling support to do reciprocating motion along the radial direction of the alkaline washing cavity, the motion further aggravates the jolt of the rolling support, and the concentration (on the local height) of sulfides and solid particles on the surface of the rolling support, the inner side wall of the alkaline washing shell and the surface of the filler is gradually increased from top to bottom (the height of the alkaline washing liquid is gradually reduced from bottom to top to the overall height of the alkaline washing cavity, the sulfides and the solid particles are not contradictory) due to the fact that part of the alkaline washing liquid which is adsorbed with sulfides and solid particles flows down on the surface of the rolling support, the inner side wall of the alkaline washing shell and the surface of the filler is made to leave a high-concentration alkaline washing liquid, and the concentration of the alkaline washing liquid is gradually reduced from top to bottom, so that the rapid flow of rich liquid (the alkaline washing liquid which is adsorbed with sulfides and solid particles) and the absorption of the sulfides and the new liquid are facilitated. Of course, it will be appreciated by those skilled in the art that in order to maintain the rolling carriage in a laterally reciprocating motion within the caustic wash chamber, a slight spacing (e.g., 5 mm) should be maintained between the lateral rolling carriage and the inside wall of the caustic wash housing.
It should be noted that the above-mentioned distal end and proximal end are respectively the ends farther away from and closer to the fixed upright.
It should be noted that although the absorption efficiency of sulfide and solid particles can be greatly increased by the above spirally arranged alkaline washing shell and the rolling bracket capable of locally bumping in both vertical and transverse directions, if the absorption efficiency is further improved, the length (limited size) and bumping degree of the alkaline washing shell cannot be infinitely increased (the structure has a long service life due to too violent collision), and therefore, the inventor makes: an opening is formed at the upper end of the alkaline washing shell for the rolling bracket to pass through, and a blocking cover is arranged on the opening in an opening and closing manner. When the rolling support rolls to the bottom of the alkaline washing chamber from top to bottom, the rolling support is taken out by opening the end cover positioned at the bottom of the alkaline washing shell, and then the rolling support is loaded into the upper end of the alkaline washing chamber through the opening at the upper end, so that the absorption efficiency of sulfide and solid particles is further improved.
The embodiment of the invention can also comprise a fixed upright post 51, a fixed base 52, a cantilever rod 53 and a supporting beam 54, and the alkaline washing shell is installed and fixed through the parts. The lower end of the fixed upright post is fixed on the fixed base; the bottom of the alkaline washing shell is fixed on the supporting beam; the two supporting beams are arranged inside and outside and fixed through cantilever rods, and the near ends of the cantilever rods are fixed on the side faces of the stand columns.
It should be further noted that the rotating mechanism further includes a supporting frame 45, and two ends of the supporting frame are respectively fixed to the two supporting beams; the support frame has a middle portion forming a rotation space 451 in which the rotating roller is rotatably installed. The structure design is reasonable, the rotation resistance of the rotating roller is small, and the flexible rotation of the rotating roller is facilitated.
In addition, the installation position of the cam on the rolling support is adjustable along the radial direction of the alkaline washing chamber, the gap between the cam and the guide vibration wheel is adjusted by adjusting the installation position of the cam along the radial direction of the alkaline washing chamber, the larger the gap is, the larger the transverse collision force is, the larger the transverse bumping of the rolling support in the transverse direction is, and the application range of the embodiment of the invention is ensured. In one adjustment mode, as shown in the figure, a cam rack is fixed on the rolling support, a mounting through hole 461 is formed on the cam rack, the cross section of the mounting through hole is a long strip, the length direction of the mounting through hole with the long strip cross section is the same as the radial direction of the alkaline cleaning chamber, the cam (such as through a bearing 410) is rotatably mounted on a cam shaft 47, and the cam shaft is locked on a certain position of the mounting through hole through a nut 48.
It should be further noted that the outer edge of the cam includes an abutting flange 441, a transition portion 442 and an avoiding portion 443, which are connected in sequence, the abutting flange abuts against the guide vibration wheel when rotating to a position away from the axis of the alkaline cleaning chamber, and the distance from the transition portion and the avoiding portion to the rotation axis of the cam is smaller than the distance from the abutting flange to the rotation axis of the cam. Through the intermittent collision of butt flange and direction vibration wheel, realize the lateral jolt of rolling support, static friction and sliding friction can not take place between cam and the direction vibration wheel, only can take place to wind the rotation of its respective axis of rotation between the two, have reduced the friction, have guaranteed the life of cam and direction vibration wheel.
Finally, a cam bracket 46 is fixed on the rolling bracket, the cam is rotatably arranged on the cam bracket, and a return torsion spring 49 is also arranged between the cam and the cam bracket. Under the natural state (not receiving external force) of reset torsion spring, the cam rotates to the position that supports tight flange towards the distal end of alkali wash cavity to make support tight flange can support tightly, collide with direction vibration wheel, along the rotor roll top-down roll process of spiral arrangement, support tight flange and receive the collision of direction vibration wheel and backward (upwards) swing, reset torsion spring is compressed, along with the continuation roll of rolling support, support tight flange and break away from direction vibration wheel, under the elastic restoring force effect of reset torsion spring, the cam resets, with the drive butt flange forward (downwards) swing, until supporting next direction vibration wheel tightly, with this circulation. Therefore, the problem that the transverse bumping can not be realized due to the fact that the abutting flange cannot abut against and collide with the guide vibrating wheel all the time because the cam excessively rotates at times is avoided.
It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, 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, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (9)
1. Amine absorption method CO 2 An alkaline tower for carbon capture, comprising:
the device comprises an alkaline washing shell, wherein a spirally-ascending alkaline washing cavity is formed in the alkaline washing shell, a rich liquid outlet is formed at the lower end of the alkaline washing shell, a gas inlet is formed in the side wall of the alkaline washing shell, which is close to the rich liquid outlet, a gas flowmeter is installed on the gas inlet, and a gas outlet is formed at the upper end of the alkaline washing shell;
the alkali liquor spraying mechanism comprises dilution pipelines, dilution valves, pipelines, a storage container, a medium pump and alkali liquor spray heads, the storage container, the medium pump and the alkali liquor spray heads are sequentially connected through the pipelines, the number of the alkali liquor spray heads is multiple, the alkali liquor spray heads are sequentially arranged at intervals along the spiral direction of the alkali washing cavity, the alkali liquor spray heads are fixed on mounting holes formed in the alkali washing shell, each alkali liquor spray head is connected to a water source through one dilution pipeline, and one dilution valve is mounted on each dilution pipeline;
a controller, the control end of the gas flow meter, the control end of the dilution valve, and the control end of the media pump all being in signal connection with the controller, the controller configured to:
gradually increasing the opening of the dilution valve in a direction away from the gas inlet;
and adjusting the power of the medium pump and the opening degree of the dilution valve based on the flue gas inlet flow detected by the gas flowmeter so that the power of the medium pump and the opening degree of the dilution valve are positively correlated with the flue gas inlet flow.
2. Amine absorption CO according to claim 1 2 The alkaline washing tower for carbon capture is characterized by further comprising a rotating mechanism, wherein the rotating mechanism comprises a plurality of rotating rollers which are rotatably installed in the alkaline washing cavity, the axes of the rotating rollers extend along the radial direction of the alkaline washing cavity, and the rotating rollers are sequentially arranged at intervals along the extending direction of the alkaline washing cavity.
3. An amine absorption process for CO according to claim 2 2 Alkaline washing tower for carbon captureThe device is characterized in that the rotating mechanism further comprises a rolling support, the rolling support is arranged on the rotating roller in a rolling manner, a containing groove for containing filler is formed in the rolling support, and the depth direction of the containing groove is the same as the tangential direction of the alkaline washing cavity;
the mounting hole is formed in the top of the caustic wash housing.
4. Amine absorption CO according to claim 3 2 The alkaline washing tower for carbon capture is characterized in that a guide vibration wheel is rotatably arranged on the side wall of the far end of the alkaline washing cavity;
a cam rotatably mounted to a distal end of the rolling carriage, the cam configured to:
the far end of the cam is tightly abutted against the guide vibration wheel; the proximal end of the cam is spaced from the leading vibratory wheel.
5. An amine absorption process for CO according to claim 4 2 The alkaline washing tower for carbon capture is characterized in that an opening is formed in the upper end of the alkaline washing shell and used for the rolling support to pass through, and a blocking cover is arranged on the opening in an openable and closable manner.
6. An amine absorption process for CO according to claim 5 2 Alkaline tower for carbon entrapment, its characterized in that still includes fixed stand, unable adjustment base, cantilever bar and supporting beam, wherein:
the lower end of the fixed upright post is fixed on the fixed base;
the bottom of the alkaline washing shell is fixed on the supporting beam;
the two supporting beams are arranged inside and outside and fixed through cantilever rods, and the near ends of the cantilever rods are fixed on the side faces of the upright posts.
7. Amine absorption CO according to claim 6 2 The alkaline tower for carbon capture is characterized in that the rotating mechanism further comprises a supporting frame, and the supporting frameTwo ends of the frame are respectively fixed on the two support beams;
the middle part of the supporting frame forms a rotating space, and the rotating roller is rotatably arranged in the rotating space.
8. Amine absorption CO according to claim 7 2 The alkaline tower for carbon capture is characterized in that the installation position of the cam on the rolling bracket is adjustable along the radial direction of the alkaline chamber;
the outer edge of the cam comprises an abutting flange, a transition portion and an avoiding portion which are connected in sequence, the abutting flange abuts against the guide vibration wheel when rotating to the axis far away from the alkaline washing cavity, and the distance from the transition portion and the avoiding portion to the rotating axis of the cam is smaller than the distance from the abutting flange to the rotating axis of the cam.
9. Amine absorption CO according to claim 8 2 The alkaline tower for carbon capture is characterized in that a cam rack is fixed on the rolling support, the cam is rotatably mounted on the cam rack, and a reset torsion spring is further mounted between the cam and the cam rack.
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| CN117247795A (en) * | 2023-11-17 | 2023-12-19 | 山西晋南钢铁集团有限公司 | Coke oven gas desulfurizing tower |
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