CN213295268U - Carbon dioxide capture system for blast furnace gas fine desulfurization - Google Patents
Carbon dioxide capture system for blast furnace gas fine desulfurization Download PDFInfo
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- CN213295268U CN213295268U CN202021264724.4U CN202021264724U CN213295268U CN 213295268 U CN213295268 U CN 213295268U CN 202021264724 U CN202021264724 U CN 202021264724U CN 213295268 U CN213295268 U CN 213295268U
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Abstract
The utility model provides a carbon dioxide capture system for blast furnace gas fine desulphurization, the system includes: the desulfurization tower (1), the desulfurization tower (1) has a coal gas inlet (9) and a desulfurized coal gas outlet (10); the desulfurization liquid spraying device (3) is arranged inside the desulfurization tower (1); the heating water tank (5) is connected with the desulfurizing tower (1) through a first pipeline, a first circulating water pump (8A) is arranged on the first pipeline, and a carbon dioxide outlet (15) is arranged on the heating water tank (5); and the cooling water tank (6) is connected with the heating water tank (5) through a second pipeline, a second circulating water pump (8B) is arranged on the second pipeline, and the cooling water tank (6) is connected with the desulfurization liquid spraying device (3) through a third pipeline. The system separates the carbon dioxide in the coal gas without participating in the chemical reaction of the desulfurization system, reduces the consumption of the desulfurizer and the treatment capacity of the desulfurization slag, saves the operation cost of the desulfurization system, and reduces the pollution to the environment.
Description
Technical Field
The utility model relates to a desulfurization system especially relates to a carbon dioxide seizure system that is used for blast furnace gas fine desulphurization.
Background
With the continuous improvement of national economic development and requirements on energy conservation and emission reduction, various large and medium-sized steel plants have new awareness on environmental protection, energy conservation and emission reduction, and the investment on environmental protection and energy conservation is more and more large. At present, blast furnace gas of each steel plant generally has no desulfurization system, and is desulfurized after a sequent gas user burns, so that the number of desulfurization systems is large, the flue gas volume of the desulfurization system is very large, and the investment on the desulfurization system is very large. At present, only part of blast furnace gas is subjected to fine desulfurization, and a desulfurization system is not arranged when the desulfurized blast furnace gas is reused in a subsequent process.
The carbon monoxide content in the blast furnace gas is between 20 and 33 percent, and the blast furnace gas is fuel with lower calorific value. The carbon dioxide content of the blast furnace gas is 8-15%, and even the carbon dioxide content of the gas of individual blast furnace is up to 20-22%. The carbon dioxide has no utilization value in the coal gas, the high content of the carbon dioxide has great influence on a desulfurization system, the carbon dioxide and the desulfurizer react while the coal gas is desulfurized, more desulfurizer is consumed, more desulfurization slag is generated to be treated, and great waste is caused.
Therefore, the reduction of carbon dioxide in the coal gas is very beneficial to a desulfurization system, and belongs to the fields of energy conservation, emission reduction and environmental protection.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a carbon dioxide capture system for blast furnace gas fine desulphurization to reduce the consumption of desulfurizer and the processing load to the desulfurization sediment.
To achieve the above object, in a first aspect, the embodiments of the present invention provide a carbon dioxide capture system for blast furnace gas fine desulfurization, which includes:
the desulfurization tower is provided with a coal gas inlet and a desulfurized coal gas outlet;
the desulfurization liquid spraying device is arranged inside the desulfurization tower;
the heating water tank is connected with the desulfurization tower through a first pipeline, a first circulating water pump is arranged on the first pipeline, and a carbon dioxide outlet is formed in the heating water tank;
and the cooling water tank is connected with the heating water tank through a second pipeline, a second circulating water pump is arranged on the second pipeline, and the cooling water tank is connected with the desulfurization liquid spraying device through a third pipeline.
Optionally, the heating water tank is heated by one or more of the following modes: hot water heating, steam heating, flue gas heating, and waste gas heating.
Optionally, the carbon dioxide discharged from the carbon dioxide outlet is conveyed to a coal injection system of the blast furnace through a pipeline.
Optionally, the heating water tank further comprises a hot water inlet and a hot water outlet; the cooling water tank further comprises a cooling water inlet and a cooling water outlet.
Optionally, a drain outlet is further arranged at the bottom of the desulfurization tower, the bottom of the heating water tank or the bottom of the cooling water tank.
Optionally, a demisting water eliminator is further disposed inside the desulfurization tower and near the desulfurized coal gas outlet.
Optionally, the carbon dioxide capture system for blast furnace gas fine desulfurization further comprises a liquid adding device, and the liquid adding device is connected with the desulfurization liquid spraying device through a pipeline.
Optionally, an emulsifying device is further arranged inside the desulfurizing tower, and the emulsifying device is arranged close to the coal gas inlet.
Optionally, the heating temperature of the heating water tank is 60 to 70 degrees.
Optionally, the carbon dioxide capture system for blast furnace gas fine desulfurization further comprises a controller electrically connected with the desulfurization solution spray device, and the controller is used for outputting a control signal to adjust the spray speed, the spray time and/or the spray direction of the desulfurization solution spray device.
Optionally, a pipeline or a chamber for cooling water or cooling air flow to flow is arranged inside the cooling water tank, the pipeline or the chamber is communicated with the cooling water inlet and the cooling water outlet, and the pipeline or the chamber is isolated from the desulfurization solution.
The technical scheme has the following beneficial effects: according to the technical scheme of the utility model, low temperature doctor solution is in the desulfurizing tower, and is different according to the solubility of carbon dioxide, absorbs or dissolves the carbon dioxide in the coal gas, heats back high temperature doctor solution release or appear the carbon dioxide in the heating tank, and the carbon dioxide is discharged from the carbon dioxide export. Or the low-temperature desulfurization solution is placed in a desulfurization tower, carbon dioxide in the coal gas reacts with sodium bicarbonate serving as a desulfurizing agent to generate sodium carbonate and water, the sodium carbonate and the water generated after heating in a heating water tank react to generate sodium bicarbonate and carbon dioxide, and the carbon dioxide is separated out and then discharged from a carbon dioxide outlet. Therefore, the carbon dioxide capture system for blast furnace gas fine desulfurization can separate the carbon dioxide in the gas without participating in the chemical reaction of the desulfurization system, reduce the using amount of the desulfurizer and the treatment amount of the desulfurization slag, save the operation cost of the desulfurization system, reduce the pollution to the environment, and has good economic benefit, environmental protection benefit and social benefit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a carbon dioxide capture system for fine desulfurization of blast furnace gas according to an embodiment of the present invention;
FIG. 2 is a flow chart of a carbon dioxide capture method for fine desulfurization of blast furnace gas according to an embodiment of the present invention;
fig. 3 is a flow chart of another method for capturing carbon dioxide used in fine desulfurization of blast furnace gas according to an embodiment of the present invention.
The reference numbers illustrate:
1-a desulfurizing tower; 2-an emulsifying device; 3-desulfurization liquid spraying device; 4-demisting water eliminator; 5-heating the water tank; 6-a cooling water tank; 7-a liquid adding device; 8A-a first circulating water pump; 8B-a second circulating water pump; 9-gas inlet; 10-gas outlet; 11-hot water inlet; 12-a hot water outlet; 13-cooling water inlet; 14-cooling water outlet; 15-carbon dioxide outlet; and 16-a sewage draining outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model provides an above-mentioned technical problem to prior art exists provides a blast furnace gas fine desulfurization's carbon dioxide capture system, makes the carbon dioxide in the coal gas separate out and does not participate in desulfurization system's chemical reaction, reduces the quantity of desulfurizer and reduces the handling capacity of desulfurization sediment, practices thrift desulfurization system's running cost, reduces the pollution to the environment, has fine economic benefits, environmental protection benefit and social.
The embodiment of the utility model provides a to above-mentioned technical problem mainly can be solved through following technical scheme: a carbon dioxide catching system for blast furnace gas fine desulfurization is a special system and combined equipment, and carbon dioxide is separated and released from a desulfurization solution by heating the desulfurization solution by using waste heat of a steel plant, so that the reaction of the carbon dioxide and a desulfurizer is reduced, the use amount of the desulfurizer is saved, and the number of desulfurization slag is reduced. And cooling the desulfurization solution after the carbon dioxide is released for recycling. The embodiment of the utility model discloses an utilize carbon dioxide and desulfurizer sodium bicarbonate reaction generation sodium carbonate and water in low temperature desulfurizing tower, reheat desulfurization liquid makes sodium carbonate and water take place the adverse reaction and regenerate desulfurizer sodium bicarbonate and carbon dioxide, send back desulfurizing tower circular desulfurization after the desulfurization liquid cooling that contains sodium bicarbonate, the carbon dioxide of release is collected and is sent to process equipment such as blast furnace and use. The carbon dioxide can be used as the gas of blast furnace coal injection to replace air and is sent back to the blast furnace, the quality and the heat value of blast furnace gas can be improved, and the method belongs to waste utilization. In addition, the carbon dioxide is easy to dissolve in water, the solubility of the carbon dioxide is high at low temperature, the carbon dioxide is dissolved in water of a desulfurizer solution in a desulfurization tower, the carbon dioxide is released due to the reduction of the solubility after the carbon dioxide is sent to a heating water tank for heating, and the carbon dioxide is collected and reused, so that the carbon dioxide is continuously recycled, and the carbon dioxide in the blast furnace gas is captured and collected.
The blast furnace gas fine desulfurization by adopting the carbon dioxide capture system ensures that the gas quality is better, the heat value is improved by 15-20 percent, the yield of the blast furnace gas is improved by 8-12 percent, and the method has good economic and social benefits.
Fig. 1 is a schematic diagram of a carbon dioxide capture system for blast furnace gas fine desulfurization according to an embodiment of the present invention. The capture system separates carbon dioxide in the coal gas from the coal gas, reduces the consumption of a desulfurizer, and improves the heat value of the coal gas. Referring to fig. 1, the carbon dioxide capturing system for fine desulfurization of blast furnace gas includes: the desulfurization tower 1 is provided with a gas inlet 9 and a desulfurized gas outlet 10; a desulfurization liquid spray device 3 arranged inside the desulfurization tower 1; the heating water tank 5 is connected with the desulfurization tower 1 through a first pipeline, a first circulating water pump 8A is arranged on the first pipeline, and a carbon dioxide outlet 15 is arranged on the heating water tank 5; and the cooling water tank 6 is connected with the heating water tank 5 through a second pipeline, a second circulating water pump 8B is arranged on the second pipeline, and the cooling water tank 6 is connected with the desulfurization liquid spraying device 3 through a third pipeline. The heating water tank 5 and the cooling water tank 6 only exchange heat with the desulfurization solution, but neither the heating medium nor the cooling medium mixes with the desulfurization solution.
In some embodiments, the heating reservoir 5 is heated by one or more of the following: hot water heating, steam heating, flue gas heating, and waste gas heating. In addition, the heating water tank 5 can adopt low-grade waste heat of a steel plant, so that energy is saved and carbon emission is reduced. Specifically, the temperature required by the heat source of the heating water tank 5 is not high, and low-temperature waste heat such as slag flushing water in steel plants, particularly blast furnace areas, can be adopted. The waste heat of the blast furnace slag flushing water is utilized, so that the generation and the discharge of slag flushing exhaust steam can be reduced, and the pollution to the environment is reduced. As an alternative embodiment, the heating water tank 5 in the present embodiment may be heated by steam, flue gas, or exhaust gas instead of hot water.
In some embodiments, the carbon dioxide exiting carbon dioxide outlet 15 is piped to the coal injection system of the blast furnace, or other application or device where carbon dioxide is needed.
In some embodiments, the heating water tank 5 further comprises a hot water inlet 11 and a hot water outlet 12, alternatively, the heating water tank 5 may comprise a hot air inlet and a hot air outlet, the hot air being hot flue gas or hot exhaust gas; the cooling water tank 6 further includes a cooling water inlet 13 and a cooling water outlet 14, and alternatively, the cooling water tank 6 may further include a cooling air flow inlet and a cooling air flow outlet that discharge the cooling fluid having an increased temperature after heat exchange. The cooling medium such as cooling water or cooling air flow flows through a pipe or a chamber inside the cooling water tank 6, which is in communication with the cooling water inlet 13 and the cooling water outlet 14, while being physically isolated from the object to be cooled (desulfurization liquid containing a desulfurizing agent), and can exchange heat.
In some embodiments, the bottom of the desulfurization tower 1, the bottom of the heating water tank 5, or the bottom of the cooling water tank 6 is also provided with a sewage discharge outlet 16. The drain outlet 16 is used for discharging the precipitated dirt in the desulfurization tower 1, or discharging the desulfurization product, or discharging the excessive desulfurization solution, and is installed at the lowest part of the desulfurization tower 1, and may be installed horizontally or vertically.
In some embodiments, the inside of the desulfurization tower 1 is further provided with a demister 4 near the desulfurized gas outlet 10. The demisting water eliminator 4 is arranged near the gas outlet 10, is positioned at the upstream of the gas outlet 10, can be fixed with the inner wall of the desulfurizing tower through a tower inner support, and is used for separating fog drops and moisture carried by the desulfurized gas. The desulfurization liquid spray device 3 is fixed with the inner wall (side wall or top wall) of the desulfurization tower 1, and the desulfurization liquid spray device 3 is arranged below the demisting water eliminator 4 and/or the desulfurized coal gas outlet 10 in the height direction.
In some embodiments, the carbon dioxide capture system for blast furnace gas fine desulfurization further comprises a liquid adding device 7, and the liquid adding device 7 is connected with the desulfurization liquid spraying device 3 through a pipeline. And a liquid adding device 7 for supplying the desulfurization liquid (containing a desulfurizing agent) to the desulfurization liquid spray device 3/addition for desulfurization, which is installed through an external bracket of the desulfurization tower 1, separately from the desulfurization tower 1, in the vicinity thereof.
In some embodiments, the inside of the desulfurization tower 1 is further provided with an emulsifying device 2, and the emulsifying device 2 is arranged close to the gas inlet 9. The emulsifying device 2 is used for realizing the sufficient mixing of gas (coal gas) and liquid (desulfurized liquid) and increasing the contact time of the gas and the liquid, is arranged at the lower part of the inside of the desulfurizing tower 1, can be fixed by adopting an in-tower support, and can adopt the emulsifying device in the prior art.
In some embodiments, the heating temperature of the heating water tank 5 is 60 to 70 degrees, preferably 65 degrees.
In some embodiments, the heating water tank 5 may be configured with a temperature monitoring module for monitoring a temperature value of the heating water tank 5 and/or a temperature value of the doctor solution in the heating water tank 5 in real time, and feeding back the temperature value to the controller, and when the monitored temperature value reaches a preset first temperature value, the controller controls to stop the heating process, for example, to stop heating by controlling to close a switch or an electrically controlled valve for delivering the heating fluid, or to stop heating by controlling to cut off a power supply of the electric heater.
In some embodiments, the cooling water tank 6 may be configured with a temperature monitoring module for monitoring a temperature value of the cooling water tank 6 and/or a temperature value of the doctor solution in the cooling water tank 6 in real time, and feeding the temperature value back to the controller, where when the monitored temperature value reaches a preset second temperature value, the controller controls to stop the cooling heat exchange process, for example, to stop heating by controlling to close a switch or an electrically controlled valve for conveying the cooling fluid, or to stop cooling by controlling to cut off a power supply of the cooler.
In some embodiments, the desulfurization solution spraying device 3 can be electrically connected with the controller, and the spraying speed, the spraying time and/or the spraying direction of the desulfurization solution spraying device 3 can be adjusted according to the control signal of the controller.
In some embodiments, the second water circulation pump 8B may be electrically connected to the controller, and activated according to a control signal from the controller, and when a predetermined condition is satisfied, the controller controls the second water circulation pump 8B to supply the generated sodium bicarbonate and the desulfurization solution to the cooling water tank 6, or to supply the heat-treated desulfurization solution to the cooling water tank 6. This predetermined condition is indicative of a reduction in the carbon dioxide content or concentration in the volume of the heating water tank 5 and/or in the desulfurization solution below a desired preset value. Optionally, the content of carbon dioxide in the heating water tank 5 in the desulfurization solution can be detected, and the content data measured by the instrument is fed back to the control system to control the rotating speed and flow of each stage of water pump, so as to achieve the optimal desulfurization and carbon dioxide removal effects.
In the embodiment, the carbon dioxide is separated or released from the blast furnace gas by utilizing the characteristics of the reaction and reverse reaction of the carbon dioxide and sodium bicarbonate serving as a desulfurizing agent under special conditions, the solubility change of the carbon dioxide in water and the like. The consumption of the desulfurizer in a subsequent desulfurization system is reduced, and the yield and the treatment cost of the desulfurization slag are reduced. The collected carbon dioxide can be sent back to the blast furnace coal injection to be reused to replace air, thus improving the heat value and the yield of the blast furnace gas.
Fig. 2 is a flowchart of a carbon dioxide capture method for blast furnace gas fine desulfurization according to an embodiment of the present invention. As shown in fig. 2, the method comprises the steps of:
s110: introducing coal gas to be desulfurized from a coal gas inlet 9 of the desulfurizing tower 1, wherein the coal gas to be desulfurized carries carbon dioxide;
s120: spraying desulfurization solution containing sodium bicarbonate serving as a desulfurizing agent by using a desulfurization solution spraying device 3 arranged in the desulfurization tower 1, so that the desulfurization solution is contacted with the coal gas to be desulfurized and reacts with carbon dioxide carried by the coal gas to generate sodium carbonate and water;
s130: the generated sodium carbonate, water and the desulfurization solution are conveyed to a heating water tank 5 by a first circulating water pump 8A;
s140: heating sodium carbonate, water and the desulfurization solution to a preset temperature value by using a heating water tank 5, so that the sodium carbonate and the water in the desulfurization solution are subjected to reverse reaction to generate sodium bicarbonate and carbon dioxide;
s150: the generated carbon dioxide is discharged through a carbon dioxide outlet 15 for reuse;
s160: the generated sodium bicarbonate and the desulfurization solution are conveyed to a cooling water tank 6 through a second circulating water pump 8;
s170: and cooling the sodium bicarbonate and the desulfurization solution by using a cooling water tank 6, and returning the cooled sodium bicarbonate and the cooled desulfurization solution to a desulfurization solution spray device 3 in the desulfurization tower 1 for circulating desulfurization.
As an example, step S150 may specifically include: the generated carbon dioxide is discharged through the carbon dioxide outlet 15 and is transported to the coal injection system of the blast furnace for reuse through a pipeline.
As an example in step S140: the heating water tank 5 is heated by one or more of the following methods: hot water heating, steam heating, flue gas heating, and waste gas heating.
As an example, the method further comprises: a demisting water eliminator 4 is arranged in the desulfurizing tower 1 and close to a desulfurized coal gas outlet 10, and the demisting water eliminator 4 is used for separating fog drops and moisture contained in the desulfurized coal gas.
Fig. 3 is a flow chart of another method for capturing carbon dioxide for blast furnace gas fine desulfurization according to an embodiment of the present invention. As shown in fig. 3, the method comprises the steps of:
s210: introducing coal gas to be desulfurized from a coal gas inlet 9 of the desulfurizing tower 1, wherein the coal gas to be desulfurized carries carbon dioxide;
s220: spraying a desulfurization solution by using a desulfurization solution spraying device 3 arranged in the desulfurization tower 1, so that the desulfurization solution is contacted with the coal gas to be desulfurized, and dissolving carbon dioxide carried by the coal gas to be desulfurized in the desulfurization solution; wherein the internal temperature of the desulfurizing tower 1 and the temperature of the desulfurizing liquid are lower than the temperature of the coal gas to be desulfurized;
s230: conveying the desulfurization solution dissolved with carbon dioxide to a heating water tank 5 by using a first circulating water pump 8A;
s240: heating the desulfurization solution dissolved with carbon dioxide to a preset temperature value by using a heating water tank 5, so that the carbon dioxide dissolved in the water of the desulfurization solution is reduced in solubility due to the increase of the temperature and is released and separated from the water;
s250: the released and separated carbon dioxide is discharged through a carbon dioxide outlet 15 for reuse;
s260: conveying the heated desulfurization solution to a cooling water tank 6 through a second circulating water pump 8;
s270: and cooling the heated desulfurization solution by using a cooling water tank 6, and sending the cooled desulfurization solution back to the desulfurization solution spray device 3 in the desulfurization tower 1 for circulating desulfurization.
The methods shown in fig. 2 and 3 may be used in combination. The working principle and working process of the above method of the capture system are described as follows:
the concentration of carbon dioxide in the coal gas is higher, the carbon dioxide reacts with sodium bicarbonate serving as a desulfurizing agent in the desulfurization solution in the desulfurization tower 1 to generate sodium carbonate and water, the sodium carbonate and the water are sent to the heating water tank 5 together with the desulfurization solution through the circulating water pump 8, the heating temperature is about 65 ℃, and the sodium carbonate and the water in the desulfurization solution react to generate the sodium bicarbonate and the carbon dioxide. The sodium bicarbonate and the desulfurization solution are sent to a cooling water tank 6 through a circulating water pump 8 to be cooled and then sent back to the desulfurization tower 1 for reuse. The separated and released carbon dioxide is discharged through the carbon dioxide outlet 15 to be reused. The carbon dioxide discharged from the carbon dioxide outlet 15 can be used for a coal injection system of the blast furnace, and the coal gas heat value of the blast furnace and the coal gas quantity of the blast furnace are improved.
In addition, carbon dioxide in the coal gas is dissolved in water of the desulfurization solution in the desulfurization tower 1 with a relatively low relative temperature, and is sent to the heating water tank 5 together with the desulfurization solution through the circulating water pump 8 to be heated to about 65 ℃, so that the carbon dioxide in the desulfurization solution water is released and separated from the water due to the reduction of the solubility caused by the increase of the temperature. The desulfurization solution is sent to a cooling water tank 6 through a circulating water pump 8 to be cooled and then sent back to the desulfurization tower 1 for reuse. The separated and released carbon dioxide is discharged through the carbon dioxide outlet 15 to be reused.
Through the continuous circulation, the carbon dioxide in the blast furnace gas is captured and used for valuable reutilization of the processes of blast furnace coal injection and the like. Reduces the carbon dioxide in the blast furnace gas, and can save the desulfurizer in the desulfurization system. The limited desulfurizer is mostly used for removing sulfide in the coal gas, and the utilization efficiency of the desulfurizer is improved. In this embodiment, after the carbon dioxide is captured, the consumption of the desulfurizing agent can be reduced, and the operating cost of the desulfurization system and the treatment cost of the desulfurization product can be reduced.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A carbon dioxide capture system for fine desulfurization of blast furnace gas, comprising:
the desulfurization tower (1), the desulfurization tower (1) has a coal gas inlet (9) and a desulfurized coal gas outlet (10);
a desulfurization liquid spray device (3) arranged inside the desulfurization tower (1);
the heating water tank (5) is connected with the desulfurization tower (1) through a first pipeline, a first circulating water pump (8A) is arranged on the first pipeline, and a carbon dioxide outlet (15) is arranged on the heating water tank (5);
and the cooling water tank (6) is connected with the heating water tank (5) through a second pipeline, a second circulating water pump (8B) is arranged on the second pipeline, and the cooling water tank (6) is connected with the desulfurization liquid spraying device (3) through a third pipeline.
2. The carbon dioxide capture system for blast furnace gas fine desulfurization according to claim 1, characterized in that the carbon dioxide discharged from the carbon dioxide outlet (15) is transferred to a coal injection system of a blast furnace through a pipeline.
3. The carbon dioxide capturing system for blast furnace gas fine desulfurization according to claim 1, characterized in that the heating water tank (5) further comprises a hot water inlet (11) and a hot water outlet (12); the cooling water tank (6) further comprises a cooling water inlet (13) and a cooling water outlet (14).
4. The carbon dioxide capturing system for blast furnace gas fine desulfurization according to claim 1, characterized in that the bottom of the desulfurization tower (1), the bottom of the heating water tank (5), or the bottom of the cooling water tank (6) is further provided with a drain outlet (16).
5. The carbon dioxide capture system for blast furnace gas fine desulphurization according to claim 1, characterized in that the inside of the desulphurization tower (1) is further provided with a demister (4) near the desulphurized gas outlet (10).
6. The carbon dioxide capture system for blast furnace gas fine desulfurization according to claim 1, characterized in that it further comprises a liquid adding device (7), and the liquid adding device (7) is connected with the desulfurization solution spraying device (3) through a pipeline.
7. The carbon dioxide capture system for blast furnace gas fine desulfurization according to claim 1, characterized in that the inside of the desulfurization tower (1) is further provided with an emulsifying device (2), and the emulsifying device (2) is disposed near the gas inlet (9); the heating temperature of the heating water tank (5) is 60-70 ℃.
8. The carbon dioxide capture system for blast furnace gas fine desulfurization according to claim 1, further comprising a controller electrically connected to the desulfurization solution spray device (3) for outputting a control signal to adjust the spray speed, spray time and/or spray direction of the desulfurization solution spray device (3).
9. The carbon dioxide capture system for blast furnace gas fine desulfurization according to claim 3, characterized in that a pipe or a chamber for flowing cooling water or cooling gas flow is provided inside the cooling water tank (6), the pipe or the chamber is communicated with the cooling water inlet (13) and the cooling water outlet (14), and the pipe or the chamber is isolated from the desulfurization solution.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114515505A (en) * | 2022-01-05 | 2022-05-20 | 中煤地第二勘探局集团有限责任公司 | Method for capturing carbon in blast furnace flue gas |
| CN114797387A (en) * | 2022-05-31 | 2022-07-29 | 华能营口热电有限责任公司 | Flue gas deep carbon capture device and method for recovering waste heat |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114515505A (en) * | 2022-01-05 | 2022-05-20 | 中煤地第二勘探局集团有限责任公司 | Method for capturing carbon in blast furnace flue gas |
| CN114515505B (en) * | 2022-01-05 | 2022-09-13 | 中煤地第二勘探局集团有限责任公司 | Method for capturing carbon in blast furnace flue gas |
| CN114797387A (en) * | 2022-05-31 | 2022-07-29 | 华能营口热电有限责任公司 | Flue gas deep carbon capture device and method for recovering waste heat |
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