Flue gas desulfurization and carbon capture integrated system

Abstract

The utility model discloses a flue gas desulfurization and carbon capture integrated system which comprises a desulfurization tower, a flue gas inlet pipe is mounted at the bottom of the desulfurization tower, a flue gas exhaust pipe is fixedly mounted at the top of the desulfurization tower, a pressurizing pipe is fixedly mounted on the outer side of the desulfurization tower, and a second sulfur and carbon capture assembly is mounted in the desulfurization tower. According to the flue gas desulfurization and carbon capture integrated system, when flue gas circulates in the first sulfur-carbon capture assembly, the second sulfur-carbon capture assembly and the third sulfur-carbon capture assembly, the flue gas is subjected to carbon dioxide filtration work through an activated carbon plate; the content of carbon dioxide in discharged flue gas is reduced, and the air environment is protected; sulfur-containing flue gas is desulfurized through water sprayed by the multiple groups of spray headers, so that the flue gas is desulfurized and decarbonized at the same time; the flue gas passing through the desulfurization tower does not need to be subjected to independent carbon capture work, so that the flue gas treatment cost is reduced, and the flue gas treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of flue gas treatment, in particular to a flue gas desulfurization and carbon capture integrated system. Background Art

[0002] The tower is usually implemented in the following ways: Wet desulfurization: lime (CaO) or limestone (CaCO3) is made into slurry and sprayed into the desulfurization tower; sulfur dioxide (SO2) reacts chemically with alkaline substances in the slurry to produce calcium sulfite (CaSO3); part of the calcium sulfite is oxidized to calcium sulfate (CaSO4); for example, in the desulfurization tower of a large thermal power plant, the lime slurry is continuously circulated and contacted with the flue gas, effectively removing a large amount of SO2; Ammonia method: ammonia water (NH3·H2O) is used as an absorbent; SO2 reacts with ammonia water to produce ammonium sulfite and ammonium bisulfite, which are then oxidized to produce ammonium sulfate; ammonium sulfate can be used as a fertilizer raw material;

[0003] Carbon capture cannot be carried out during the flue gas desulfurization process, and carbon dioxide emissions cannot be effectively reduced, which aggravates the greenhouse effect. Carbon dioxide is one of the main greenhouse gases, and large-scale emissions will lead to global warming and trigger a series of extreme climate and ecological problems. Utility Model Content

[0004] The purpose of the utility model is to provide an integrated system of flue gas desulfurization and carbon capture to solve the defects mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, a flue gas desulfurization and carbon capture integrated system is provided, including a desulfurization tower, a smoke inlet pipe is installed at the bottom of the desulfurization tower, and a smoke exhaust pipe is fixedly installed at the top of the desulfurization tower, and a booster pipe is fixedly installed on the outside of the desulfurization tower, and a second sulfur-carbon capture assembly is installed inside the desulfurization tower, a third sulfur-carbon capture assembly is installed on the upper side of the second sulfur-carbon capture assembly, and a first sulfur-carbon capture assembly is installed on the lower side of the second sulfur-carbon capture assembly, and the composition structure of the first sulfur-carbon capture assembly, the second sulfur-carbon capture assembly and the third sulfur-carbon capture assembly are consistent, the first sulfur-carbon capture assembly includes an activated carbon plate installed inside the desulfurization tower through a support seat, and a spray desulfurization disk is installed on the upper side of the activated carbon plate, and a plurality of groups of spray heads are evenly installed on the bottom of the spray desulfurization disk.

[0006] Preferably, the first sulfur-carbon capture assembly, the second sulfur-carbon capture assembly and the third sulfur-carbon capture assembly are arranged in layers from bottom to top, and the sulfur-containing flue gas at the bottom of the desulfurization tower passes through the first sulfur-carbon capture assembly, the second sulfur-carbon capture assembly and the third sulfur-carbon capture assembly in sequence and is discharged through the exhaust pipe.

[0007] Preferably, the activated carbon plates on the first sulfur-carbon capture assembly, the second sulfur-carbon capture assembly and the third sulfur-carbon capture assembly are all arranged in a circular shape, and three groups of perforations are provided on the three groups of activated carbon plates, and the perforations on two adjacent groups of activated carbon plates are staggered.

[0008] Preferably, the axial cross-section of the activated carbon plate, spray desulfurization disk and desulfurization tower is a concentric circle structure, and the activated carbon plate and the spray desulfurization disk are arranged relatively to each other, and the activated carbon plate and the spray desulfurization disk are evenly connected through three groups of connecting columns.

[0009] Preferably, water inlet branches are installed at the ends of the spray desulfurization plates on the first sulfur-carbon capture assembly, the second sulfur-carbon capture assembly and the third sulfur-carbon capture assembly, and the three groups of water inlet branches pass through the side wall of the desulfurization tower and are connected to the boosting pipe. At the same time, the boosting pipe is connected to the water outlet pipe of the external spray treatment liquid boosting pump.

[0010] Preferably, a stepper motor is fixedly installed on the outside of the smoke exhaust pipe, and the output shaft of the stepper motor is fixedly connected to the rotating shaft of the isolation plate. At the same time, the isolation plate is a circular structure made of metal material, and a sealing gasket is fixedly installed on the outside of the isolation plate, and the sealing gasket is arranged in an annular shape.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model filters carbon dioxide from flue gas through activated carbon plates when flue gas circulates inside the first sulfur-carbon capture assembly, the second sulfur-carbon capture assembly and the third sulfur-carbon capture assembly; desulfurizes sulfur-containing flue gas through water sprayed by multiple groups of spray heads, thereby achieving simultaneous desulfurization and decarbonization of flue gas, reducing the content of carbon dioxide in the exhaust flue gas and protecting the air environment; after the flue gas passes through the desulfurization tower, there is no need to perform separate carbon capture, thereby reducing the cost and efficiency of flue gas treatment;

[0013] 2. The utility model starts the external switch of the stepper motor, and the output shaft of the stepper motor drives the isolation plate to rotate. The isolation plate locks the exhaust pipe through the outer sealing gasket, so that in strong wind weather, the airflow with impurities will not flow back into the exhaust pipe, avoiding affecting the normal operation of the desulfurization system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front view of the structure of the utility model;

[0015] Figure 2 for Figure 1 Bottom view of

[0016] Figure 3 for Figure 1 A top view of

[0017] Figure 4 It is a schematic diagram of a first sulfur-carbon capture assembly, a second sulfur-carbon capture assembly and a third sulfur-carbon capture assembly;

[0018] Figure 5 for Figure 4 Bottom view of .

[0019] Numbers in the figure: 1. Desulfurization tower; 2. First sulfur-carbon capture assembly; 21. Activated carbon plate; 22. Spray desulfurization disk; 221. Spray head; 23. Connecting column; 24. Perforation; 3. Second sulfur-carbon capture assembly; 4. Third sulfur-carbon capture assembly; 5. Exhaust pipe; 6. Isolation plate; 7. Sealing gasket; 8. Stepper motor; 9. Booster pipe. DETAILED DESCRIPTION

[0020] See also Figure 1-5 The utility model provides an integrated flue gas desulfurization and carbon capture system, including a desulfurization tower 1, a smoke inlet pipe is installed at the bottom of the desulfurization tower 1, and a smoke exhaust pipe 5 is fixedly installed on the top of the desulfurization tower 1, and a booster pipe 9 is fixedly installed on the outside of the desulfurization tower 1, and a second sulfur-carbon capture assembly 3 is installed inside the desulfurization tower 1, a third sulfur-carbon capture assembly 4 is installed on the upper side of the second sulfur-carbon capture assembly 3, and a first sulfur-carbon capture assembly 2 is installed on the lower side of the second sulfur-carbon capture assembly 3, and the first sulfur-carbon capture assembly 2, the second sulfur-carbon capture assembly 3 and the third sulfur-carbon capture assembly 4 have the same composition structure, the first sulfur-carbon capture assembly 2 includes an activated carbon plate 21 installed inside the desulfurization tower 1 through a support seat, and a spray desulfurization disk 22 is installed on the upper side of the activated carbon plate 21, and a plurality of groups of spray heads 221 are evenly installed on the bottom of the spray desulfurization disk 22.

[0021] Working principle: When in use, the flue gas to be treated enters the interior of the desulfurization tower 1 from the smoke inlet pipe, and passes through the first sulfur-carbon capture component 2, the second sulfur-carbon capture component 3 and the third sulfur-carbon capture component 4 in sequence and is discharged through the smoke exhaust pipe 5; when the flue gas circulates inside the first sulfur-carbon capture component 2, the second sulfur-carbon capture component 3 and the third sulfur-carbon capture component 4, the flue gas is filtered for carbon dioxide through the activated carbon plate 21; the sulfur-containing flue gas is desulfurized by water sprayed by multiple groups of spray heads 221, thereby achieving simultaneous desulfurization and decarbonization of the flue gas; the content of carbon dioxide in the exhaust flue gas is reduced to protect the air environment; the flue gas after passing through the desulfurization tower 1 does not need to undergo separate carbon capture, thereby reducing the cost and efficiency of flue gas treatment.

[0022] As a preferred embodiment, the first sulfur-carbon capture assembly 2, the second sulfur-carbon capture assembly 3 and the third sulfur-carbon capture assembly 4 are arranged in layers from bottom to top, and the sulfur-containing flue gas at the bottom of the desulfurization tower 1 passes through the first sulfur-carbon capture assembly 2, the second sulfur-carbon capture assembly 3 and the third sulfur-carbon capture assembly 4 in sequence and is discharged through the exhaust pipe 5.

[0023] The activated carbon plates 21 on the first sulfur-carbon capture assembly 2, the second sulfur-carbon capture assembly 3 and the third sulfur-carbon capture assembly 4 are all circularly arranged, and three groups of perforations 24 are provided on the three groups of activated carbon plates 21, and the perforations 24 on two adjacent groups of activated carbon plates 21 are staggered.

[0024] As a preferred embodiment, the axial cross-section of the activated carbon plate 21, the spray desulfurization disk 22 and the desulfurization tower 1 is a concentric circle structure, and the activated carbon plate 21 and the spray desulfurization disk 22 are arranged relatively to each other, and the activated carbon plate 21 and the spray desulfurization disk 22 are evenly connected through three groups of connecting columns 23.

[0025] like Figure 1-4 As shown: the liquid enters the spray desulfurization disk 22 inside the first sulfur-carbon capture component 2, the second sulfur-carbon capture component 3 and the third sulfur-carbon capture component 4 in turn from the booster pipe 9 through three groups of branch pipes. A plurality of groups of spray heads 221 are evenly arranged at the bottom of the spray desulfurization disk 22. The atomized liquid sprayed from the spray heads 221 can desulfurize the sulfur-containing flue gas; the perforations 24 on the two adjacent groups of activated carbon plates 21 are staggered, so that the three groups of activated carbon plates 21 will not block the rising airflow.

[0026] As a preferred embodiment, water inlet branches are installed at the ends of the spray desulfurization plates 22 on the first sulfur-carbon capture assembly 2, the second sulfur-carbon capture assembly 3 and the third sulfur-carbon capture assembly 4, and the three groups of water inlet branches pass through the side wall of the desulfurization tower 1 and are connected to the booster pipe 9. At the same time, the booster pipe 9 is connected to the water outlet pipe of the external spray treatment liquid booster pump.

[0027] As a preferred embodiment, a stepper motor 8 is fixedly installed on the outer side of the smoke exhaust pipe 5, and the output shaft of the stepper motor 8 is fixedly connected to the rotating shaft of the isolation plate 6. At the same time, the isolation plate 6 is a circular structure made of metal material, and a sealing gasket 7 is fixedly installed on the outer side of the isolation plate 6, and the sealing gasket 7 is arranged in a ring shape.

[0028] Before using the activated carbon plate 21, the activated carbon needs to be modified to improve its selectivity and adsorption capacity for carbon dioxide; for example, by introducing specific functional groups on the surface of the activated carbon or changing the pore structure through chemical impregnation or physical treatment, the selectivity and adsorption capacity for carbon dioxide can be improved.

[0029] When the desulfurization tower 1 is idle and not in use, the external switch of the stepper motor 8 is started, and the output shaft of the stepper motor 8 drives the isolation plate 6 to rotate. The isolation plate 6 locks the smoke exhaust pipe 5 through the outer sealing gasket 7, so that in strong wind weather, the airflow with impurities will not flow back into the interior of the smoke exhaust pipe 5, avoiding affecting the normal operation of the desulfurization system.

Claims

1. A flue gas desulfurization and carbon capture integrated system, comprising a desulfurization tower (1), characterized in that: The bottom of the desulfurization tower (1) is provided with a smoke inlet pipe, and the top of the desulfurization tower (1) is fixedly provided with a smoke exhaust pipe (5), and the outside of the desulfurization tower (1) is fixedly provided with a booster pipe (9), and the inside of the desulfurization tower (1) is provided with a second sulfur-carbon capture assembly (3), the upper side of the second sulfur-carbon capture assembly (3) is provided with a third sulfur-carbon capture assembly (4), and the lower side of the second sulfur-carbon capture assembly (3) is provided with a first sulfur-carbon capture assembly (2), and the composition structure of the first sulfur-carbon capture assembly (2), the second sulfur-carbon capture assembly (3) and the third sulfur-carbon capture assembly (4) are consistent, and the first sulfur-carbon capture assembly (2) comprises an activated carbon plate (21) installed inside the desulfurization tower (1) through a support seat, and a spray desulfurization disk (22) is installed on the upper side of the activated carbon plate (21), and a plurality of groups of spray heads (221) are evenly installed on the bottom of the spray desulfurization disk (22).

2. The integrated flue gas desulfurization and carbon capture system according to claim 1, characterized in that: The first sulfur-carbon capture assembly (2), the second sulfur-carbon capture assembly (3) and the third sulfur-carbon capture assembly (4) are arranged in layers from bottom to top, and the sulfur-containing flue gas at the bottom of the desulfurization tower (1) passes through the first sulfur-carbon capture assembly (2), the second sulfur-carbon capture assembly (3) and the third sulfur-carbon capture assembly (4) in sequence and is then discharged through a smoke exhaust pipe (5).

3. The integrated flue gas desulfurization and carbon capture system according to claim 1, characterized in that: The activated carbon plates (21) on the first sulfur-carbon capture assembly (2), the second sulfur-carbon capture assembly (3) and the third sulfur-carbon capture assembly (4) are all arranged in a circular shape, and three groups of perforations (24) are provided on each of the three groups of activated carbon plates (21), and the perforations (24) on two adjacent groups of activated carbon plates (21) are arranged in a staggered manner.

4. The integrated flue gas desulfurization and carbon capture system according to claim 1, characterized in that: The axial cross-section of the activated carbon plate (21), the spray desulfurization disk (22) and the desulfurization tower (1) is a concentric circle structure, and the activated carbon plate (21) and the spray desulfurization disk (22) are arranged relative to each other, and the activated carbon plate (21) and the spray desulfurization disk (22) are evenly connected through three groups of connecting columns (23).

5. The integrated flue gas desulfurization and carbon capture system according to claim 1, characterized in that: Water inlet branches are installed at the ends of the spray desulfurization disks (22) on the first sulfur-carbon capture assembly (2), the second sulfur-carbon capture assembly (3) and the third sulfur-carbon capture assembly (4), and the three groups of water inlet branches are connected to the booster pipe (9) through the side wall of the desulfurization tower (1), and the booster pipe (9) is connected to the water outlet pipe of the external spray treatment liquid booster pump.

6. The integrated flue gas desulfurization and carbon capture system according to claim 1, characterized in that: A stepper motor (8) is fixedly mounted on the outside of the smoke exhaust pipe (5), and the output shaft of the stepper motor (8) is fixedly connected to the rotating shaft of the isolation plate (6). The isolation plate (6) is a circular structure made of metal material, and a sealing gasket (7) is fixedly mounted on the outside of the isolation plate (6), and the sealing gasket (7) is arranged in an annular shape.

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