Flue gas washing cooling tower device

Abstract

The utility model discloses a flue gas washing and cooling tower device, which belongs to the technical field of flue gas washing and purification and comprises a Venturi tube, a sealing plate, a gas flow distribution plate, a slurry stabilizing layer, a conical section, a spraying layer, a demister, a condensate collecting cover and the like. A Venturi tube is adopted as a core structure to dedust flue gas, the flue gas is purified and cooled through alkali liquor spraying, demisting is carried out in a condensation mode, the device has the characteristics of integrally and synergistically removing various pollutants such as particulate matter, acid gas and flue gas water and white smoke, and has the advantages of small occupied area, compact structure and the like; the method has a wide application prospect in the field of flue gas integrated co-processing.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas washing and purification, and particularly relates to a flue gas washing cooling tower device. Background Art

[0002] Flue gas washing and purification is an important means to remove various pollutants in flue gas. Its principle is that through the direct contact between flue gas and coolant, the pollutants in the flue gas are intercepted or dissolved in the washing liquid or slurry, and then the acidic components (SO 2 , NOx, HCl, HF), CO, heavy metals, particulate matter, dioxins and some other harmful substances soluble in the washing liquid are removed. At the same time, due to the heat exchange formed by direct contact, the flue gas is cooled, so as to achieve the purpose of controlling the pollutant content and preventing environmental pollution. At present, the commonly used flue gas scrubbers are mainly divided into tower type, liquid column type, Venturi type, power wave type, etc. When the existing flue gas washing and purification technologies generally have problems such as long process flow, high energy consumption, and low purification efficiency, so it is of great significance to adopt an integrated washing and cooling device for the cooling and purification of flue gas.

[0003] CN201621317206.8 discloses a high-temperature flue gas washing and purification device, including two-stage bottom-connected empty towers, a turbulent ball tower, an electric demister I and an electric demister II. Different properties and concentrations of spray liquids can be replaced according to the properties, concentrations and flow rates of the flue gas, and different specifications, models and materials of equipment can be replaced by using the principle of acid-base neutralization. However, it involves many devices, the system is relatively complex, and the energy consumption is high. CN202110874200.X discloses a flue gas washing, cooling and water collection system, including a recycled water tank, a recycled water pump, a demister washing water pipe, a demister washing water collecting tank, a demister washing water collecting tank drain pipe, a clarified water tank, a recycled water tank, a pool, a cooling tower, a flue gas cooling water spray liquid distribution pipe, a flue gas cooling water collecting tank and a flue gas cooling water collecting tank drain pipe, which can realize flue gas washing, flue gas cooling and flue gas water collection; however, its process is long and the degree of integration is low. Therefore, the problems of long flue gas purification process flow and low purification efficiency of waste liquid incineration flue gas have seriously hindered its large-scale popularization and application, and it is urgent to carry out relevant technical research to solve the technical bottleneck problems. Content of the Utility Model

[0004] Purpose of the Utility Model: To solve the above problems, the utility model provides a flue gas washing cooling tower device; another purpose of the utility model is to provide a solid waste treatment system and method for liquid-phase incineration and co-gasification including the flue gas washing cooling tower device.

[0005] Technical solution: To achieve the above object, a flue gas washing cooling tower device of the present utility model includes a Venturi tube, a flue gas inlet flue, a riser pipe, a sealing plate, a throat tube, a flue gas expansion tube, an air flow distribution plate, a slurry stable layer, a conical section, a first spray layer, a second spray layer, a condensation demister, a high-level water tank, a circulation pump, a condensate collection cover, a liquid guide pipe, a liquid level control valve, a slurry agitation spray pipe, a drainage pump, a first bypass valve, a second bypass valve, and a demister flushing spray layer. During operation, the flue gas at the outlet of the quench tank enters the flue gas washing cooling tower device for dust removal, purification, and demisting. Subsequently, a part of the flue gas is supplied to the gas cooler as cooling gas, and the other part enters the reheater to raise the temperature and remove harmful substances, and then is discharged through the chimney.

[0006] Further, the flue gas washing cooling tower device is cylindrical with a circular cross-section. A Venturi tube is arranged in the lower part thereof. The structure of the Venturi tube from top to bottom is successively a condensate collection cover, a liquid guide pipe, a sealing plate, a riser pipe, a flue gas inlet flue, a throat tube, a flue gas expansion tube, and an air flow distribution plate. The condensate collection cover is located at the top of the Venturi tube, and the junction with the riser pipe is separated by a sealing plate. A liquid guide pipe is arranged above the sealing plate. The riser pipe is located between the condensate collection cover and the throat tube and is connected to the throat tube. The flue gas inlet flue is located in the middle of the riser pipe and is perpendicular to the riser pipe, extending to the outside of the flue gas washing cooling tower device. The throat tube is located below the riser pipe and the flue gas inlet flue and connects the riser pipe and the flue gas expansion tube. The air flow distribution plate is integrated with the flue gas expansion tube and is located at the bottom of the Venturi tube.

[0007] Further, the flue gas washing cooling tower device receives the flue gas from the quench tank and enters the riser pipe of the Venturi tube from the flue gas inlet flue. It is blocked by the sealing plate and then moves downward into the throat tube, increasing the flue gas flow rate and causing inertial collision with the alkali liquid. Subsequently, it enters the flue gas expansion tube. The flue gas expansion tube is immersed in the supernatant of the slurry. The flue gas enters the supernatant of the slurry, separates from the dust therein, and diffuses through the air flow distribution plate. The slurry turbid liquid and the supernatant are separated by the slurry stable layer. When the flue gas diffuses from the air flow distribution plate, it is blocked by the slurry stable layer and does not affect the slurry turbid liquid below the slurry stable layer. The conical section is located above the Venturi tube. The flue gas diffuses upward after passing through the air flow distribution plate and leaves the supernatant of the slurry, passes through the external gap of the Venturi tube, and bypasses the conical section and continues to move upward. The second spray layer is located above the conical section, and the first spray layer is located above the second spray layer. The flue gas is in full contact with the alkali liquid sprayed by the first spray layer and the second spray layer in the middle area between the conical section and the first spray layer and the second spray layer for purification and dust removal. The condensation demister is located above the first spray layer. The flue gas enters the condensation demister to remove moisture after being purified and dust-removed by two-stage spraying, and then leaves the flue gas washing cooling tower device and enters the reheater to remove harmful substances.

[0008] Further, the flue gas washing cooling tower device is provided with an alkali liquor circulation system, and the alkali liquor for flue gas purification is added to a high-level water tank outside the flue gas washing cooling tower device for temporary storage. The outlet of the high-level water tank is connected to the inlet of the circulation pump, and the outlet of the circulation pump is connected to the inlets of the first spray layer and the second spray layer. The alkali liquor temporarily stored in the high-level water tank is pumped into the first spray layer and the second spray layer by the circulation pump to spray and purify the flue gas. The conical section is located above the condensate collection hood, and the alkali liquor that has contacted the flue gas is blocked by the conical section and falls into the condensate collection hood or directly falls into the condensate collection hood to be collected. The bottom of the condensate collection hood is connected to a liquid guide pipe, and the liquid guide pipe is connected to the inlet of the high-level water tank. The alkali liquor collected by the condensate collection hood enters the high-level water tank through the liquid guide pipe, realizing the recycling of the alkali liquor. The bottom of the high-level water tank is connected to the inlet of the liquid level control valve, and the outlet of the liquid level control valve is connected to the inlet of the throat pipe. The circulating alkali liquor in the high-level water tank enters the throat pipe through the liquid level control valve, contacts the flue gas in the same direction and flows through the flue gas expansion pipe, and finally falls into the lower area of the flue gas washing cooling tower device to form a slurry. The liquid level height of the slurry is controlled by the liquid level control valve. The slurry carries dust and small particles in the flue gas dust removal. The dust and small particles on the upper part settle to the bottom. Therefore, the upper part of the slurry is clarified and the lower part is turbid. The slurry turbid liquid and the supernatant liquid are separated by the slurry stabilizing layer. A slurry disturbance spray pipe is arranged below the slurry stabilizing layer. A drainage pump is externally connected to the bottom of the flue gas washing cooling tower device. The outlet of the drainage pump is connected to the inlets of the first bypass valve and the second bypass valve. The outlet of the first bypass valve is connected to the inlet of the slurry disturbance spray pipe. The slurry turbid liquid at the bottom of the flue gas washing cooling tower device is transported by the drainage pump. Part of it enters the slurry disturbance spray pipe through the first bypass valve for spraying and stirring, so that the dust and small particles in the slurry turbid liquid will not settle and block. The other part is discharged into the quenching tank as quenching liquid through the second bypass valve.

[0009] Further, the condensing demister (1212) is located in the upper part of the washing cooling tower system (12), and the specific position is above the first spray layer (1210) and the second spray layer (1211). The condensing demister (1212) is provided with a plurality of transverse V-shaped channel structures, including a plurality of flue gas channels and circulating water channels, which are distributed at intervals. The flue gas passes through the flue gas channels between the circulating water channels from bottom to top, and at the same time, the circulating water passes through the circulating water channels from top to bottom, realizing the condensation of the moisture in the flue gas. The demister flushing spray layer is located above the condensing demister, and process water is periodically sprayed to clean the particles and dust attached to the condensing demister. Subsequently, the process water falls into the condensate collection hood and enters the high-level water tank as supplementary moisture through the liquid guide pipe.

[0010] Further, the air distribution plate is the bottom structure of the flue gas expansion pipe and is immersed in the supernatant liquid of the slurry. The specific form is a circular plate, and a large number of round holes are evenly and densely arranged on the plate surface. The flue gas passes through the air distribution plate from top to bottom, and is dispersed into the supernatant liquid of the slurry by a large number of round holes and then bubbles out of the slurry, realizing the uniform gas distribution of the flue gas.

[0011] Furthermore, the slurry stabilizing layer is located between the lower slurry suspension and the supernatant in the flue gas washing cooling tower device. The layer adopts a plurality of inverted V-shaped roof structures, and the bottom of the roof structure is a slurry channel, which connects the slurry suspension and the supernatant. The main function of the slurry stabilizing layer is to separate the slurry suspension from the supernatant, so that the gas distribution of the flue gas in the slurry supernatant and the agitation of the slurry in the slurry suspension do not interfere with each other, and prevent the dust and particles in the suspension from re-entering the flue gas.

[0012] Beneficial effects: Compared with the prior art, the flue gas washing cooling tower device of the present utility model uses a Venturi tube as the core structure to remove dust from the flue gas, and purifies and cools the flue gas by alkali liquid spraying, and removes fog by condensation, which simplifies the process and improves the purification efficiency while. A part of the treated purified flue gas is supplied to the gas cooler as cooling gas to realize heat exchange; the other part enters the reheater to raise the temperature and remove harmful substances before being discharged. Description of the Drawings

[0013] Figure 1 is the device structure diagram;

[0014] Figure 2 is the Venturi tube structure diagram;

[0015] Figure 3 is the air flow distribution plate structure diagram;

[0016] Figure 4 is the slurry stabilizing layer structure diagram;

[0017] Figure 5 is the condensation demister structure diagram;

[0018] Reference numerals: 1201-Venturi tube; 1202-flue gas inlet flue; 1203-riser; 1204-sealing plate; 1205-throat tube; 1206-flue gas expansion tube; 1207-air flow distribution plate; 1208-slurry stabilizing layer; 1209-cone section; 1210-first spray layer; 1211-second spray layer; 1212-condensation demister; 1213-high-level water tank; 1214-circulation pump; 1215-condensate collection hood; 1216-liquid guide pipe; 1217-liquid level control valve; 1218-slurry agitation spray pipe; 1219-drainage pump; 1220-first bypass valve; 1212-second bypass valve; 1222-demister flushing spray layer. Detailed Embodiments

[0019] The present utility model will be further clarified below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. For those skilled in the art, they can still modify the described technical solutions with reference to the following embodiments, or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, system deletions, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0020] As Figures 1-5 shown, a flue gas washing cooling tower device includes a Venturi tube 1201, a flue gas inlet duct 1202, a riser 1203, a sealing plate 1204, a throat tube 1205, a flue gas expansion tube 1206, an air flow distribution plate 1207, a slurry stabilizing layer 1208, a conical section 1209, a first spray layer 1210, a second spray layer 1211, a condensing demister 1212, a high-level water tank 1213, a circulation pump 1214, a condensate collection hood 1215, a liquid guide pipe 1216, a liquid level control valve 1217, a slurry agitation spray pipe 1218, a drainage pump 1219, a first bypass valve 1220, a second bypass valve 1221, and a demister flushing spray layer 1222. During operation, the flue gas at the outlet of the quench tank enters the flue gas washing cooling tower device for dust removal, purification and demisting. After that, a part of it is supplied to the gas cooler as cooling gas, and the other part enters the reheater to raise the temperature and remove harmful substances, and then is discharged through the chimney.

[0021] The tower body is cylindrical with a circular cross-section. A Venturi tube (1201) is provided in the lower part thereof. The structure of the Venturi tube (1201) from top to bottom is successively a condensate collection hood (1215), a liquid guide pipe (1216), a sealing plate (1204), a riser pipe (1203), a flue gas inlet duct (1202), a throat pipe (1205), a flue gas expansion pipe (1206), and an air flow distribution plate (1207); the condensate collection hood (1215) is located at the top of the Venturi tube (1201), and the junction with the riser pipe (1203) is separated by the sealing plate (1204), and a liquid guide pipe (1216) is provided above the sealing plate (1204); the riser pipe (1203) is located between the condensate collection hood (1215) and the throat pipe (1205) and is connected to the throat pipe (1205); the flue gas inlet duct (1202) is located in the middle of the riser pipe (1203) and is perpendicular to the riser pipe (1203) and extends to the outside of the flue gas washing and cooling tower device; the throat pipe (1205) is located below the riser pipe (1203) and the flue gas inlet duct (1202) and connects the riser pipe (1203) and the flue gas expansion pipe (1206); the air flow distribution plate (1207) is integrated with the flue gas expansion pipe (1206) and is located at the bottom of the Venturi tube (1201).

[0022] 1) Flue gas washing process: The flue gas in the quench tank enters the riser pipe (1203) of the Venturi tube (1201) from the flue gas inlet duct (1202), is blocked by the sealing plate (1204) and thus moves downward into the throat pipe (1205), causing the flue gas flow rate to increase and undergo inertial collision with the lye. Subsequently, it enters the flue gas expansion pipe (1206). The flue gas expansion pipe (1206) is immersed in the supernatant of the slurry. The flue gas enters the supernatant of the slurry, separates from the dust therein, and is diffused through the air flow distribution plate (1207). After passing through the air flow distribution plate (1207), the flue gas is blocked by the slurry stable layer (1208), diffuses upward and leaves the supernatant of the slurry, passes through the external gap of the Venturi tube (1201), bypasses the conical section (1209) and continues to move upward. The flue gas is in full contact with the sprayed lye in the middle area between the conical section (1209) and the first spray layer (1210) and the second spray layer (1211) for purification and dust removal, and enters the condensate demister (1212) to remove moisture. Subsequently, it leaves the flue gas washing and cooling tower device and enters the reheater to remove harmful substances.

[0023] 2) Alkali solution circulation process: The alkali solution temporarily stored in the elevated water tank 1213 is pumped by the circulation pump 1214 into the first spray layer 1210 and the second spray layer 1211 to spray and purify the flue gas. The alkali solution that has contacted the flue gas is blocked by the conical section 1209 and falls into the condensate collection hood 1215 or directly falls into the condensate collection hood 1215 to be collected, and then enters the elevated water tank 1213 through the liquid guide pipe 1216, realizing the recycling of the alkali solution. At the same time, the circulating alkali solution in the elevated water tank 1213 enters the throat 1205 through the liquid level control valve 1217, contacts the flue gas in the same direction and flows through the flue gas expansion pipe, and finally falls into the lower area of the flue gas washing and cooling tower device to form a slurry. The liquid level height of the slurry is controlled by the liquid level control valve 1217. The dust and small particles in the flue gas dust removal are carried in the slurry. The dust and small particles on the upper part settle to the bottom, so the upper part of the slurry is clarified and the lower part is turbid. The slurry turbid liquid and the supernatant liquid are separated by the slurry stabilizing layer 1208. The slurry turbid liquid at the bottom is transported by the drain pump 1219. Part of it enters the slurry agitation spray pipe 1218 through the first bypass valve 1220 for spraying and agitation, so that the dust and small particles in the slurry turbid liquid will not settle and block. The other part is discharged into the quench tank as quench liquid through the second bypass valve 1221.

[0024] Specifically, the condensate demister (1212) is located in the upper part of the washing and cooling tower system (12), and the specific position is above the first spray layer (1210) and the second spray layer (1211); the condensate demister (1212) is provided with a plurality of transverse V-shaped channel structures, including a plurality of flue gas channels and circulating water channels, which are distributed at intervals; the flue gas passes through the flue gas channels between the circulating water channels from bottom to top, and at the same time the circulating water passes through the circulating water channels from top to bottom to realize the condensation of the moisture in the flue gas; the demister flushing spray layer (1222) is located above the condensate demister (1212), and periodically sprays process water to clean the particles and dust attached to the condensate demister (1212). Subsequently, the process water falls into the condensate collection hood (1215), and enters the elevated water tank (1213) as supplementary moisture through the liquid guide pipe (1216). The air distribution plate (1207) is used as the bottom structure of the flue gas expansion pipe (1206) and is immersed in the supernatant liquid of the slurry. The specific form is a circular plate, and a large number of round holes are evenly and densely arranged on the plate surface; the flue gas passes through the air distribution plate (1207) from top to bottom, and is dispersed into the supernatant liquid of the slurry by a large number of round holes and then bubbles out of the slurry, realizing the uniform gas distribution of the flue gas. The slurry stabilizing layer (1208) is located between the slurry turbid liquid and the supernatant liquid in the lower part of the flue gas washing and cooling tower device. The layer surface adopts a plurality of inverted V-shaped roof structures, and the bottom of the roof structure is a slurry channel, connecting the slurry turbid liquid and the supernatant liquid; the main function of the slurry stabilizing layer (1208) is to separate the slurry turbid liquid and the supernatant liquid, so that the gas distribution of the flue gas in the supernatant liquid of the slurry and the agitation of the slurry in the slurry turbid liquid do not interfere with each other, and prevent the dust and particles in the turbid liquid from re-entering the flue gas.

[0025] Embodiment

[0026] Briefly combined with a 45792 Nm 3 / h flue gas scrubbing tower device below, briefly analyze its flue gas removal effect:

[0027] (1) Flue gas treatment capacity: 45792 Nm 3 / h;

[0028] (2) Flue gas temperature: 92 °C;

[0029] (3) Dust removal device: Venturi + air distribution plate;

[0030] (4) Acid removal: Two-stage alkali liquor spraying + condensate collection hood;

[0031] (5) Water removal: Condensing demister;

[0032] (6) Inlet flue gas composition:

[0033]

[0034]

[0035] (7) Outlet flue gas composition:

[0036]

[0037]

[0038] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features.

Claims

1. A flue gas washing cooling tower device, characterized in that: The device comprises a venturi tube (1201), a flue gas inlet duct (1202), a riser (1203), a sealing plate (1204), a throat (1205), a flue gas expansion pipe (1206), an air flow distribution plate (1207), a slurry stabilization layer (1208), a cone section (1209), a first spray layer (1210), a second spray layer (1211), a condensation demister (1212), a high-level water tank (1213), a circulation pump (1214), a condensate collection hood (1215), a liquid guide pipe (1216), a liquid level control valve (1217), a slurry disturbance nozzle (1218), a drainage pump (1219), a first bypass valve (1220), a second bypass valve (1221), and a demister flushing spray layer (1222); the upper area of ​​the flue gas washing cooling tower device is provided with a demister flushing spray layer (1222), a condensation demister, and a second bypass valve (1221) from top to bottom. The mist collector (1212), the second spray layer (1211), and the first spray layer (1210) are connected to the process water, the condensing mist collector (1212) is connected to the circulating cooling water, the first spray layer (1210) and the second spray layer (1211) are connected to the high-level water tank (1213), and the middle area is provided with a cone section (1209), a venturi tube (1201), and a high-level water tank (1213) from top to bottom. The water tank (1213) and the cone section (1209) are located on the wall of the flue gas washing cooling tower device. The venturi tube (1201) is located in the center of the middle area and is connected to the high-level water tank (1213). The lower area is provided with a slurry stabilization layer (1208) and a slurry disturbance nozzle (1218) from top to bottom. The slurry stabilization layer (1208) is arranged perpendicular to the length of the tower. The slurry disturbance nozzle (1218) is located at the bottom and is connected to the quench tank.

2. The flue gas scrubbing cooling tower device according to claim 1, characterized in that: The tower body is cylindrical and has a circular cross section. A venturi tube (1201) is arranged at the lower part. The venturi tube (1201) comprises, from top to bottom, a condensate collection hood (1215), a liquid guide tube (1216), a sealing plate (1204), a vertical pipe (1203), a flue gas inlet duct (1202), a throat pipe (1205), a flue gas expansion pipe (1206), and an air flow distribution plate (1207). The condensate collection hood (1215) is located at the top of the venturi tube (1201) and is separated from the vertical pipe (1203) by a sealing plate (1204). A liquid guide tube (1204) is arranged above the sealing plate (1204). The vertical pipe (1203) is located between the condensate collection hood (1215) and the throat pipe (1205), and is connected to the throat pipe (1205); the flue gas inlet duct (1202) is located in the middle of the vertical pipe (1203), is perpendicular to the vertical pipe (1203), and extends to the outside of the flue gas washing cooling tower device; the throat pipe (1205) is located below the vertical pipe (1203) and the flue gas inlet duct (1202), and is connected to the vertical pipe (1203) and the flue gas expansion pipe (1206); the air flow distribution plate (1207) is integrated with the flue gas expansion pipe (1206), and is located at the bottom of the venturi tube (1201).

3. The flue gas scrubbing cooling tower device according to claim 1 is characterized in that: The smoke inlet flue (1202) is connected to the vertical pipe (1203) of the venturi tube (1201). When the smoke flows, it is blocked by the sealing plate (1204) and moves downward into the throat pipe (1205). The throat pipe (1205) is connected to the smoke expansion pipe (1206). The smoke contacts the slurry supernatant in the smoke expansion pipe (1206) and diffuses through the air flow distribution plate (1207). The slurry turbid liquid and the supernatant are separated by the slurry stabilizing layer (1208). The cone section (1209) is located above the venturi tube (1201). The second spray layer (1211) is located above the cone section (1209), and the first spray layer (1210) is located above the second spray layer (1211). The flue gas is fully in contact with the alkali solution sprayed by the first spray layer (1210) and the second spray layer (1211) in the middle area between the cone section (1209) and the first spray layer (1210) and the second spray layer (1211) for purification and dust removal. The condensation demister (1212) is located above the first spray layer (1210), and the flue gas enters the condensation demister (1212) after being purified and dust removed by two stages of spraying.

4. The flue gas scrubbing cooling tower device according to claim 1, characterized in that: An alkali liquid circulation system is provided, and the alkali liquid used for flue gas purification is added to a high-level water tank (1213) outside the flue gas washing cooling tower device for temporary storage; the water outlet of the high-level water tank (1213) is connected to the inlet of a circulation pump (1214), and the outlet of the circulation pump (1214) is connected to the water inlets of a first spray layer (1210) and a second spray layer (1211); the alkali liquid temporarily stored in the high-level water tank (1213) is pumped into the first spray layer (1210) and the second spray layer (1211) by the circulation pump (1214) to spray and purify the flue gas; the cone section (1209) is located above the condensate collection hood (1215), and the alkali liquid that has contacted the flue gas is blocked by the cone section (1209) and falls into the condensate collection hood (1215) or directly The alkali liquid that falls into the condensate collection hood (1215) is collected. The bottom of the condensate collection hood (1215) is connected to a liquid guide tube (1216). The liquid guide tube (1216) is connected to the water inlet of the high-level water tank (1213). The alkali liquid collected by the condensate collection hood (1215) enters the high-level water tank (1213) through the liquid guide tube (1216), thereby realizing the recycling of the alkali liquid. The bottom of the high-level water tank (1213) is connected to the inlet of a liquid level control valve (1217). The outlet of the liquid level control valve (1217) is connected to the water inlet of the throat pipe (1205). The lower area of ​​the device is a section of slurry. The liquid level of the slurry is controlled by the liquid level control valve (1217). The turbid liquid and the supernatant liquid of the slurry are separated by a slurry stabilization layer (1208). A slurry disturbance nozzle (1218) is provided below the slurry stabilization layer (1208); a drainage pump (1219) is externally connected to the bottom of the flue gas washing cooling tower device; a water outlet of the drainage pump (1219) is connected to a first bypass valve (1220) and a water inlet of a second bypass valve (1221); and a water outlet of the first bypass valve (1220) is connected to a water inlet of the slurry disturbance nozzle (1218).

5. The flue gas scrubbing cooling tower device according to claim 3, characterized in that: The condensing demister (1212) is located at the upper part of the flue gas washing cooling tower device, specifically above the first spray layer (1210) and the second spray layer (1211); the condensing demister (1212) is provided with a plurality of transverse V-shaped channel structures, including a plurality of flue gas channels and circulating water channels, which are spaced apart.

6. The flue gas scrubbing cooling tower device according to claim 3, characterized in that: The airflow distribution plate (1207) serves as the bottom structure of the flue gas expansion pipe (1206), and is immersed in the slurry supernatant. The specific form is a circular plate, and a large number of circular holes are evenly and densely arranged on the plate surface.

7. The flue gas scrubbing cooling tower device according to claim 4, characterized in that: The slurry stabilization layer (1208) is located between the slurry turbid liquid and the supernatant liquid in the lower part of the flue gas washing cooling tower device, and the layer adopts multiple inverted V-shaped roof structures, and the bottom of the roof structure is a slurry channel.

Images