CN219691674U - Device for absorbing carbon dioxide in flue gas - Google Patents
Device for absorbing carbon dioxide in flue gas Download PDFInfo
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- CN219691674U CN219691674U CN202320117044.7U CN202320117044U CN219691674U CN 219691674 U CN219691674 U CN 219691674U CN 202320117044 U CN202320117044 U CN 202320117044U CN 219691674 U CN219691674 U CN 219691674U
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- flue gas
- reaction kettle
- gas
- inner cylinder
- carbon dioxide
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 140
- 239000003546 flue gas Substances 0.000 title claims abstract description 140
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 24
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 124
- 239000007789 gas Substances 0.000 claims abstract description 117
- 238000010521 absorption reaction Methods 0.000 claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 230000001105 regulatory effect Effects 0.000 claims description 45
- 238000003756 stirring Methods 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 15
- 238000012544 monitoring process Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 12
- 238000012806 monitoring device Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 6
- 239000000779 smoke Substances 0.000 abstract description 25
- 238000000034 method Methods 0.000 abstract description 12
- 230000009102 absorption Effects 0.000 description 55
- 238000002386 leaching Methods 0.000 description 18
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000002893 slag Substances 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 230000009919 sequestration Effects 0.000 description 3
- 239000011343 solid material Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910017917 NH4 Cl Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000009103 reabsorption Effects 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to the field of carbon dioxide trapping, and discloses a device for absorbing carbon dioxide in flue gas. The device comprises a plurality of reaction kettles which are sequentially communicated, wherein each reaction kettle comprises an inner barrel and a jacket barrel; the inner cylinder body is provided with a smoke inlet, and a gas distributor is arranged in the inner cylinder body and is communicated with the smoke inlet; the gas distributor is provided with a plurality of exhaust holes; an absorption liquid inlet and an absorption liquid outlet are arranged on the inner cylinder body; and a discharge hole is formed in the bottom of the inner cylinder body. The device can continuously absorb and aim at CO in the flue gas 2 High treatment efficiency and absorptivityHigh and the like, and the treatment process is simple and convenient, thereby having great industrial application prospect.
Description
Technical Field
The utility model relates to the field of carbon dioxide trapping, in particular to a device for absorbing carbon dioxide in flue gas.
Background
The flue gas generated in industrial processes such as coal burning or steelmaking contains a large amount of CO 2 The direct discharge will cause serious gas pollution, greenhouse effect and other problems, and the CO at present 2 Is a potential carbon capture and sequestration means which avoids post-CO 2 Risk of leakage, and at the same time, since mineralized products have certain added value, the stability and safety of the mineral sequestration technology are more advantageous than other sequestration means, and can be used for absorbing CO 2 And reduce CO 2 And (5) discharging. The current common mineral sealing technology is to fix carbon by steel slag, wherein the steel slag contains a large amount of calcium oxide and adopts NH (NH) 4 The leaching solution obtained after leaching the steel slag by the Cl solution contains a large amount of Ca 2+ The leaching solution is used for absorbing CO 2 Not only can realize the CO 2 At the same time, caCO with higher economic value can be obtained 3 And (5) a product.
At present in the chemical processThe generated smoke emission is large, and the mineral sealing technology is currently used for treating CO in the smoke 2 When in use, CO in the flue gas 2 Is low in absorption efficiency, and a large amount of CO still exists in the treated flue gas 2 The carbon emission reduction effect cannot be well achieved. In addition, since a large amount of flue gas generated in the industrial process is not easy to store, but the prior art has low treatment efficiency and small treatment capacity for the flue gas, the need for finding CO in the flue gas is urgent 2 The device has high absorptivity and high flue gas treatment efficiency and can treat a large amount of flue gas.
Disclosure of Invention
The utility model aims to overcome the defects of CO in the flue gas existing in the prior art 2 The absorption rate is low, the flue gas treatment efficiency is low, the treatment capacity is small, the absorption efficiency is low due to the fact that continuous absorption cannot be carried out, and the like, a device for treating carbon dioxide in flue gas is provided, and the device has the function of aiming at CO in flue gas 2 High absorptivity, large flue gas treatment capacity, high treatment efficiency, continuous absorption and the like, has simple treatment process, and can prepare CaCO with economic value 3 And (5) a product.
In order to achieve the above object, according to one aspect of the present utility model, there is provided an apparatus for treating carbon dioxide in flue gas, the apparatus comprising a plurality of reaction kettles sequentially connected, the reaction kettles comprising an inner barrel and a jacket barrel, the inner barrel being provided with a flue gas inlet and a gas distributor being provided therein, the gas distributor being connected to the flue gas inlet; the gas distributor is provided with a plurality of exhaust holes;
an absorption liquid inlet and an absorption liquid outlet are arranged on the inner cylinder body;
and a discharge hole is formed in the bottom of the inner cylinder body.
Preferably, a tail gas outlet is arranged on the reaction kettle and is used for discharging the flue gas after the treatment in the reaction kettle is finished.
Preferably, the reaction kettle is further provided with a stirrer, and the stirrer comprises a stirring motor, a stirring rod and a stirring paddle which are sequentially connected.
Preferably, a temperature measuring device for monitoring the temperature of materials in the reaction kettle is arranged on the reaction kettle.
Preferably, the reaction kettle is provided with a pH value monitoring device for monitoring the pH value of materials in the reaction kettle.
Preferably, a density analyzer for monitoring the density of the materials in the reaction kettle is arranged on the reaction kettle.
Preferably, the inner cylinder is provided with a heating medium inlet and a heating medium outlet.
Preferably, the tail gas outlet is connected with a tail gas discharge pipe, and a gas regulating valve is arranged on the tail gas discharge pipe.
Preferably, the inner cylinder body is provided with a sampling port.
Preferably, the number of the reaction kettles is 2-5.
The utility model relates to a method for treating CO in flue gas 2 The device of the device is characterized in that a plurality of reaction kettles are communicated and NH of steel slag is adopted 4 Cl leaching solution as absorption liquid for CO in flue gas 2 Carrying out absorption and treatment, conveying the flue gas into an inner cylinder of the reaction kettle through a flue gas inlet, conveying the flue gas into a gas distributor arranged in the inner cylinder through a pipeline, uniformly spraying the flue gas through an exhaust hole arranged on the gas distributor, wherein the gas distributor increases the contact area of the flue gas and an absorption liquid, ensures that the mixing of the flue gas and the absorption liquid is more uniform, and further ensures that the mixing of the flue gas and the absorption liquid is more sufficient under the action of a stirrer arranged in the inner cylinder, thereby ensuring that CO in the flue gas is more uniform 2 The flue gas to be treated can be repeatedly absorbed in the device or the flue gas is absorbed by a plurality of reaction kettles at the same time, so that the CO in the flue gas is further improved 2 The absorption rate of the flue gas and the treatment efficiency of the flue gas can be used for reducing CO in the flue gas as much as possible 2 The absorption treatment is carried out, the aim of emission reduction is well realized, and the position of the smoke is greatly liftedManaging the quantity;
in addition, the device of the utility model can realize the continuous absorption and discharge process, the absorption process of the smoke is not needed to be stopped when the discharge is carried out, the continuous treatment process of a large amount of smoke can be realized, and the treatment efficiency and the treatment capacity of the smoke are further improved, so the device of the utility model can be used for treating a large amount of smoke and can also effectively improve the CO in the smoke 2 The absorption rate of the water-based paint is simple and convenient to operate, and has great industrial application prospect.
Drawings
Fig. 1 is a schematic structural view of an apparatus for absorbing carbon dioxide in flue gas according to the present utility model.
Description of the reference numerals
1 an inner cylinder; 2, a jacket cylinder;
3, a discharge hole; 4, an absorption liquid inlet;
5 a temperature measuring device; 6 a pH value monitoring device;
7, sampling port; 8, a density analyzer;
9 an absorption liquid outlet; 10 flue gas inlets;
11 smoke outlet; 12 exhaust gas discharge pipe
13 population; 14 a gas distributor;
15 a stirrer; 16 stirring rods;
17 stirring paddles; 18, a stirring motor;
19 a gas delivery line; 191 a third gas regulating valve;
a 20 gas flow meter; a first flue gas input line 21;
211 a first gas regulating valve; 22 flue gas inner exhaust pipelines;
221 a second gas regulating valve; 23 tail gas outlet;
24 heating medium inlet; 25 a heating medium outlet;
26 a transfer pump; 27 a gas regulating valve;
28 a first flue gas outlet; 29 a first flue gas inlet;
a second flue gas outlet 30; a second flue gas input line 31;
311 fifth gas regulating valve.
Detailed Description
The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
In the present utility model, unless otherwise indicated, terms of orientation or positional relationship such as "upper", "lower", "top", "bottom", "inner", "outer", and the like are described based on the orientation or relative positional relationship shown in the drawings, and are merely for convenience of description of the present utility model, and do not indicate that the apparatus or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, unless explicitly specified and limited otherwise, the term "coupled" is to be construed broadly and may be, for example, fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The utility model provides a device for absorbing carbon dioxide in flue gas, which is shown in figure 1, and comprises a plurality of reaction kettles which are sequentially communicated, wherein each reaction kettle comprises an inner cylinder body 1 and a jacket cylinder body 2, a flue gas inlet 10 is arranged on the inner cylinder body 1, a gas distributor 14 is arranged in the inner cylinder body 1, and the gas distributor 14 is communicated with the flue gas inlet 10; the gas distributor 14 is provided with a plurality of gas discharge holes.
In the device of the utility model, the jacket cylinder 2 is sleeved outside the inner cylinder 1. A heating medium is filled between the jacket cylinder 2 and the inner cylinder 1, and the heating medium is used for exchanging heat of materials in the inner cylinder 1.
In the device according to the utility model, the inner cylinder is provided with a heating medium inlet 24 and a heating medium outlet 25. And a conveying pump 26 is adopted to enable a heating medium to enter the shell layer between the inner cylinder 1 and the jacket cylinder 2 through a heating medium inlet 31 for controlling the reaction temperature in the reaction kettle, and the heating medium subjected to heat exchange is discharged from the heating medium outlet 25.
In a specific embodiment, the heating medium may be a synthetic oil, for example #50 synthetic oil.
In a specific embodiment, the device further comprises a gas flow meter 20, said gas flow meter 20 being adapted to monitor the flow of flue gas to be treated into the device.
In the device, the flue gas enters the reaction kettle through the flue gas inlet 10 to be contacted with the absorption liquid so as to realize the absorption of carbon dioxide.
In the device of the utility model, except the reaction kettle at the tail end, the rest reaction kettles are provided with a smoke outlet 11, and the smoke outlet 11 is communicated with a smoke inlet 10 of the next reaction kettle.
In a specific embodiment, an absorption liquid inlet 4 and an absorption liquid outlet 9 are arranged on the inner cylinder body 1 of the reaction kettle. The absorption liquid inlet 4 is used for inputting CO absorption into the reaction kettle 2 An absorption liquid outlet 9 for outputting the absorbed CO 2 The absorption liquid is obtained.
In a more specific embodiment, the absorption liquid inlet 4 is disposed at the upper portion of the reaction kettle, and the absorption liquid outlet 9 is disposed at the bottom portion of the reaction kettle.
In a specific embodiment, the absorption liquid is steel slag passing NH 4 A leaching solution after Cl leaching, wherein the leaching solution contains a large amount of Ca 2+ The leaching solution and CO 2 Reacting to generate CaCO 3 And (5) a product.
In a specific embodiment, a discharge port 3 is arranged at the bottom of the inner cylinder body 1 and is used for outputting that the absorption liquid absorbs CO 2 The main component of the solid material is CaCO 3 。
In the device of the utility model, the reaction kettle is also provided with a stirrer 15, and the stirrer 15 comprises a stirring motor 18, a stirring rod 16 and a stirring paddle 17 which are sequentially connected. The stirring motor 18 is arranged at the top of the inner cylinder body 1, the stirring rod 16 and the stirring paddle 17 are arranged in the inner cylinder body 1, the stirring paddle 17 is connected with the stirring motor 18 at the top of the inner cylinder body 1 through the stirring rod 16, and the stirring motor drives the stirring paddle 17 to rotate when rotating 18, and disturbance is carried out on liquid materials in the inner cylinder body 1, so that the reaction of flue gas and absorption liquid is more thorough, and CO in the flue gas is caused 2 Is absorbed as much as possible, thereby achieving the purpose of further improving the absorption rate of carbon dioxide in the flue gas.
In the device of the utility model, the gas distributor 14 is arranged at the bottom of the inner cylinder 1, the flue gas enters the inner cylinder 1 through the flue gas inlet 10 arranged on the reaction kettle and enters the gas distributor 14 through a communication pipeline, and then is sprayed out through the exhaust hole arranged on the gas distributor 14 to react with the absorption liquid in the inner cylinder 1, the gas distributor 14 is helpful for the further contact reaction of the flue gas and the absorption liquid, and the CO in the flue gas is further promoted 2 Is an absorption rate of (a).
In the device, the temperature measuring device 5 for monitoring the temperature of the materials in the reaction kettle is arranged on the reaction kettle, and is used for monitoring the temperature in the reaction kettle, so that the reaction temperature in the reaction kettle can be regulated and controlled conveniently, and the calcium carbonate product meeting the conditions is obtained. The temperature measuring device can be a thermometer, a thermometer and other instruments commonly used in the field for testing the temperature of a reaction system.
In the device of the utility model, the reaction kettle is provided with a pH value monitoring device 6 for monitoring the pH value of materials in the reaction kettle. The pH value monitoring device 6 is used for monitoring the pH value of the materials in the reaction kettle, and when the pH value of the materials is lower than 7.5, the absorption liquid needs to be replaced. The pH monitoring device 6 may be a pH meter.
In the device of the utility model, a density analyzer 8 for monitoring the density of the materials in the reaction kettle is arranged on the reaction kettle. The density analyzer 8 is used for monitoring the density of the materials in the reaction kettle.
In the device, the inner cylinder body is provided with the sampling port 7, and when the reaction kettle is in a specific experiment or production process, materials in the reaction kettle can be sampled and detected through the sampling port 7.
In the device, the inner cylinder body is provided with the population 13, and after the reaction kettle is stopped, workers can check, overhaul or clean the reaction kettle through the population 13 so as to keep the normal use of the reaction kettle.
In the device of the utility model, a tail gas outlet 23 is arranged on the reaction kettle, and the tail gas outlet 23 is used for discharging the tail gas after the treatment in the reaction kettle is finished. The exhaust outlet 23 is connected with an exhaust pipe 12, and a gas regulating valve 27 is arranged on the exhaust pipe 12. The gas regulating valve 27 is used for regulating the exhaust emission of the tail gas in the reaction kettle.
In a specific embodiment, the exhaust outlet 23 is located at the top of the inner cylinder 1.
In a preferred embodiment, the number of the reaction kettles is 2-5.
In the device of the utility model, one or more reaction kettles can be selected for discharging, and the gas regulating valves at the smoke inlet 10 and the tail gas outlet 23 of the discharge reaction kettles are only closed during discharging.
In the apparatus of the present utility model, the gas regulating valve 27 is a common regulating valve in the art, and is not limited herein.
In the device of the utility model, the plurality of reaction kettles are a first reaction kettle and a second reaction kettle in turn along the flow direction of the flue gas.
In the device, the process of repeatedly absorbing and treating the flue gas for many times can be realized through the mutually communicated reaction kettles, and CO in the flue gas can be fully absorbed 2 The absorption is complete, and the CO in the flue gas is greatly improved 2 The device can also realize the continuous treatment process of the flue gas, and the discharging process after the flue gas is absorbed and CO in the flue gas 2 The absorption process of the device can be carried out simultaneously, and the absorption treatment process of the smoke is not required to be stopped when the device is used for discharging, so that the treatment capacity and the treatment efficiency of the smoke are further improved, and a large amount of smoke can be well treated by the device. In addition, the flue gas to be treated is conveyed to a gas distributor 14 of the reaction kettle through a flue gas inlet 10, is sprayed out through an exhaust hole on the gas distributor 14 and is in contact reaction with the absorption liquid in the reaction kettle, the contact area of the flue gas and the absorption liquid is increased by the gas distributor, and CO in the flue gas is further improved 2 Is an absorption rate of (a).
The present utility model will be described in detail by way of examples, but the scope of the present utility model is not limited thereto.
The following embodiment is implemented by adopting the device for absorbing carbon dioxide in flue gas, the specific structure is shown in fig. 1, the number of the reaction kettles is 2, the two reaction kettles are sequentially named as a first reaction kettle and a second reaction kettle along the flow direction of the flue gas to be treated, the device comprises two reaction kettles which are sequentially communicated, the two reaction kettles comprise an inner cylinder body 1 and a jacket cylinder body 2, a flue gas inlet 10 is arranged on the inner cylinder body 1, a gas distributor 14 is arranged in the inner cylinder body 1, the gas distributor 14 is communicated with the flue gas inlet 10, and the gas distributor is arranged at the bottom of the inner cylinder body 1; the gas distributor 14 is provided with a plurality of exhaust holes;
the reaction kettle is also provided with a stirrer 15, and the stirrer 15 comprises a stirring motor 18, a stirring rod 16 and a stirring paddle 17 which are sequentially connected. The stirring motor 18 is arranged at the top of the inner cylinder body 1, the stirring rod 16 and the stirring paddle 17 are arranged in the inner cylinder body 1, and the stirring paddle 17 is connected with the stirring motor 18 at the top of the inner cylinder body 1 through the stirring rod 16;
a temperature measuring device 5 is arranged on the reaction kettle, and the temperature measuring device 5 is a thermometer;
the reaction kettle is provided with a pH value monitoring device 6, and the pH value monitoring device 6 is a pH meter;
a density analyzer 8 is arranged on the reaction kettle;
the inner cylinder body 1 is provided with a heating medium inlet 24 and a heating medium outlet 25;
the top of the reaction kettle is provided with a tail gas outlet 23, the tail gas outlet 23 is connected with a tail gas discharge pipe 12, and a gas regulating valve 27 is arranged on the tail gas discharge pipe 12;
an absorption liquid inlet 4 and an absorption liquid outlet 9 are arranged on the inner cylinder body 1;
the inner cylinder body 1 is provided with a sampling port 7;
a discharge hole 3 is formed in the bottom of the inner cylinder body 1;
the device also comprises a gas conveying pipeline 19, a first flue gas input pipeline 21, a flue gas internal exhaust pipeline 22 and a second flue gas input pipeline 31;
the device further comprises a gas flow meter 20 for monitoring the flow of flue gas to be treated fed into the gas feed line 19;
the gas conveying pipeline 19 is provided with a first smoke outlet 28, a first smoke inlet 29 and a second smoke outlet 30;
the first flue gas input pipeline 21 is communicated with the first flue gas outlet 28 and the flue gas inlet 10 on the first reaction kettle;
the flue gas internal discharge pipeline 22 is communicated with the first flue gas inlet 29 and the flue gas outlet 11 on the first reaction kettle;
the second flue gas input pipeline 31 is communicated with the second flue gas outlet 30 and the flue gas inlet 10 on the second reaction kettle;
a first gas regulating valve 211 is arranged on the first flue gas input pipeline 21 and is used for controlling the flow of flue gas entering the first reaction kettle; a fifth gas regulating valve 311 is arranged on the second flue gas input pipeline 31 and is used for controlling the flow of flue gas entering the second reaction kettle;
a second gas regulating valve 221 is arranged on the flue gas inner discharge pipe 22 and is used for controlling the flow of the flue gas output from the first reaction kettle;
the gas delivery pipeline 19 is provided with a third gas regulating valve 191, and the third gas regulating valve 191 is located between the first flue gas outlet 28 and the first flue gas inlet 29.
Example 1
Absorbing liquid (steel slag passing through NH) 4 The leaching solution after Cl leaching) enters the inner cylinder 1 through the absorption liquid inlets 4 of the first reaction kettle and the second reaction kettle to absorb CO in the flue gas 2 ；
First, the third gas regulating valve 191 and the gas regulating valve 27 of the first reaction kettle are closed, and the first gas regulating valve 211, the second gas regulating valve 221, the fifth gas regulating valve 311 and the gas regulating valve 27 of the second reaction kettle are opened; delivering the flue gas to be treated into a gas delivery pipeline 19, testing the flow rate of the introduced flue gas to be treated to be 20-30L/min through a gas flowmeter 20, delivering the flue gas to be treated into a gas distributor 14 in a first reaction kettle through a flue gas inlet 10 of the first reaction kettle through a first flue gas input pipeline 21, and spraying the sprayed flue gas and absorption liquid (steel slag passes through NH 4 The leaching solution after Cl leaching) and thenThe flue gas and the absorption liquid (steel slag is subjected to NH) are mixed under the action of a stirrer 15 4 The leaching solution after Cl leaching) is further mixed; the flue gas treated in the first reaction kettle flows into the gas conveying pipeline 19 through the flue gas internal discharge pipeline 22, is conveyed to the gas distributor 14 of the second reaction kettle through the second flue gas input pipeline 31 to be sprayed out, the sprayed flue gas is subjected to reabsorption treatment in the second reaction kettle, and tail gas after treatment is discharged through the tail gas outlet 23 of the second reaction kettle;
the heating medium (# 50 synthetic oil) is conveyed to the middle parts of the inner cylinder body 1 and the jacket cylinder body 2 of the reaction kettle through a heating medium inlet 24 on the reaction kettle, and the heating medium subjected to heat exchange is discharged through a heating medium outlet 25;
discharging by adopting the first reaction kettle, opening a third gas regulating valve 191, a fifth gas regulating valve 311 and a gas regulating valve 27 at the tail gas outlet of the second reaction kettle, and closing a first gas regulating valve 211, a second gas regulating valve 221 and the gas regulating valve 27 at the tail gas outlet of the first reaction kettle; and discharging the solid material calcium carbonate obtained after the treatment in the first reaction kettle from the discharge port 3, wherein the smoke is still treated in the second reaction kettle.
CO in flue gas using the apparatus described in example 1 2 Treating and finally CO in the flue gas 2 The absorptivity of (2) is 85-90%.
Example 2
Absorbing liquid (steel slag passing through NH) 4 The leaching solution after Cl leaching) enters the inner cylinder 1 through the absorption solution inlets 4 of the first reaction kettle and the second reaction kettle to absorb CO2 in the flue gas;
first, the second gas regulating valve 221 is closed, and the first gas regulating valve 211, the fifth gas regulating valve 311, the third gas regulating valve 191 and the gas regulating valve 27 are opened; delivering the flue gas to be treated into a gas delivery pipeline 19, testing that the flow rate of the introduced flue gas to be treated is 40-60L/min through a gas flowmeter 20, dividing the flue gas to be treated into two parts in the gas delivery pipeline 19, delivering one part of the flue gas into a gas distributor 14 in a first reaction kettle through a first flue gas input pipeline 21, spraying the flue gas through a vent hole on the gas distributor 14, reacting the sprayed flue gas with an absorption liquid (leaching liquid of steel slag after leaching with NH4 Cl), and further mixing the flue gas with the absorption liquid under the action of a stirrer 15; the other smoke is conveyed to the gas distributor 14 of the second reaction kettle through the second smoke input pipeline 31 to be sprayed out, and the sprayed smoke is absorbed in the second reaction kettle; the tail gas after the treatment is discharged through a tail gas outlet 23 of the first reaction kettle and the second reaction kettle;
the heating medium (# 50 synthetic oil) is conveyed to the middle parts of the inner cylinder body 1 and the jacket cylinder body 2 of the reaction kettle through a heating medium inlet 24 on the reaction kettle, and the heating medium subjected to heat exchange is discharged through a heating medium outlet 25;
discharging by adopting a second reaction kettle, opening a first gas regulating valve 211 and a gas regulating valve 27 at a tail gas outlet of the first reaction kettle, and closing a third gas regulating valve 191, a second gas regulating valve 221, a fifth gas regulating valve 311 and a gas regulating valve 27 at a tail gas outlet of the second reaction kettle; and discharging the solid material calcium carbonate obtained after the treatment in the second reaction kettle from the discharge port 3, wherein the flue gas is still treated in the first reaction kettle.
CO in flue gas using the apparatus described in example 1 2 Treating and finally CO in the flue gas 2 The absorption rate of (2) is 75-80%.
The device of the utility model can be used for treating CO in the flue gas 2 When the absorption treatment is carried out, a plurality of treatment methods exist, the repeated absorption treatment of the flue gas for many times or the treatment of the flue gas by a plurality of reaction kettles can be realized through the gas regulating valve arranged on the regulating pipeline, and the CO in the flue gas can be improved 2 The absorption efficiency of the device can also improve the treatment capacity and the treatment efficiency of the flue gas, and the device can simultaneously absorb and discharge the materials, thereby further improving the CO in the flue gas 2 Has great industrial application prospect.
The preferred embodiments of the present utility model have been described in detail above, but the present utility model is not limited thereto. Within the scope of the technical idea of the utility model, a number of simple variants of the technical solution of the utility model are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the utility model, all falling within the scope of protection of the utility model.
Claims (10)
1. The device for absorbing the carbon dioxide in the flue gas is characterized by comprising a plurality of reaction kettles which are communicated in sequence, wherein each reaction kettle comprises an inner barrel (1) and a jacket barrel (2);
a flue gas inlet (10) is formed in the inner cylinder body (1), a gas distributor (14) is arranged in the inner cylinder body, and the gas distributor (14) is communicated with the flue gas inlet (10); a plurality of exhaust holes are formed in the gas distributor (14);
an absorption liquid inlet (4) and an absorption liquid outlet (9) are arranged on the inner cylinder body (1);
the bottom of the inner cylinder body (1) is provided with a discharge hole (3).
2. The device for absorbing carbon dioxide in flue gas according to claim 1, wherein a tail gas outlet (23) is arranged on the reaction kettle, and the tail gas outlet (23) is used for discharging flue gas after the treatment in the reaction kettle is finished.
3. The device for absorbing carbon dioxide in flue gas according to claim 1, wherein the reaction kettle is further provided with a stirrer (15), and the stirrer (15) comprises a stirring motor (18), a stirring rod (16) and a stirring paddle (17) which are sequentially connected.
4. The device for absorbing carbon dioxide in flue gas according to claim 1, wherein the reaction kettle is provided with a temperature measuring device (5) for monitoring the temperature of materials in the reaction kettle.
5. The device for absorbing carbon dioxide in flue gas according to claim 1, wherein the reaction kettle is provided with a pH monitoring device (6) for monitoring the pH value of the material in the reaction kettle.
6. The device for absorbing carbon dioxide in flue gas according to claim 1, wherein a density analyzer (8) for monitoring the density of the material in the reaction vessel is arranged on the reaction vessel.
7. Device for absorbing carbon dioxide in flue gas according to claim 1, characterised in that the inner cylinder (1) is provided with a heating medium inlet (24) and a heating medium outlet (25).
8. Device for absorbing carbon dioxide in flue gas according to claim 2, characterised in that the off-gas outlet (23) is connected with an off-gas discharge pipe (12), on which off-gas discharge pipe (12) a gas regulating valve (27) is arranged.
9. Device for absorbing carbon dioxide in flue gas according to claim 1, characterised in that the inner cylinder (1) is provided with a sampling port (7).
10. The apparatus for absorbing carbon dioxide in flue gas according to claim 1, wherein the number of reaction kettles is 2-5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320117044.7U CN219691674U (en) | 2023-01-14 | 2023-01-14 | Device for absorbing carbon dioxide in flue gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320117044.7U CN219691674U (en) | 2023-01-14 | 2023-01-14 | Device for absorbing carbon dioxide in flue gas |
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| CN219691674U true CN219691674U (en) | 2023-09-15 |
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