Flue gas desulfurization and dust removal washing tower

Abstract

The utility model provides a flue gas desulfurization and dust removal washing tower, and relates to the technical field of desulfurization and dust removal. The device comprises a cylindrical tower body and a filter box tightly attached to the side face of the tower body, the filter box and the tower body share part of the side wall, the top of the tower body is a cone with an upward tip, the top end of the cone is an upward exhaust port, and an air inlet is formed in the side face of the lower portion of the tower body; a pore plate is arranged in the middle of the filter box and divides the filter box into an upper mud filter box and a lower clear liquid box, a pore channel leading to the interior of the tower body is formed in the upper part of the mud filter box, a drainage plate extending to the middle of the mud filter box is arranged at the lower edge of the pore channel, and the clear liquid box is communicated with the interior of the tower body; the tower body is provided with a first spraying head and a second spraying head, a combined cover is arranged above the air inlet, the combined cover comprises an upper conical cover and a lower hood without a top cap, the center of the hood without the top cap is provided with a hole and a horizontal edge, the outer edge of the horizontal edge is fused with the tower body, and the horizontal edge is connected with a hole channel leading to the mud filtering box. The flue gas desulfurization and dust removal washing tower disclosed by the utility model is simple and convenient to maintain and clean and saves energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization and dust removal technology, specifically to a flue gas desulfurization and dust removal scrubbing tower. Background Technology

[0002] Industries that widely use coal-fired boilers, such as thermal power plants, require desulfurization and dust removal equipment to treat the waste gas generated by these industries, as the main pollutants in their flue gas are particulate matter and sulfur oxides. Desulfurization can be carried out during combustion or after combustion. During combustion, circulating fluidized bed boilers are used, which can be co-fired with limestone for desulfurization and require temperature control. After combustion, desulfurization equipment is installed between the boiler tail and the chimney, and this is the main desulfurization method used. Dust removal can be divided into two main categories according to different working principles: mechanical dust collectors and electrostatic dust collectors. It can also be divided into dry dust collection and wet dust collection based on whether liquid is involved.

[0003] Wet desulfurization utilizes an alkaline solution as the desulfurizing agent, employing physical and chemical reactions to carry out desulfurization in a three-phase process involving gas, liquid, and solid. The desulfurization products are mixed with the residual liquid. Wet dust removal utilizes the contact between liquid and gas, accompanied by heat and mass transfer, to separate dust particles from the gas through washing. Existing technologies often use scrubbing towers for both desulfurization and dust removal. However, existing flue gas desulfurization and dust removal scrubbing towers present difficulties in handling the sludge formed by dust, requiring separate settling tanks for collection and treatment. Utility Model Content

[0004] Therefore, this utility model proposes a flue gas desulfurization and dust removal scrubbing tower to overcome the problems existing in the prior art.

[0005] The technical solution of this utility model is as follows:

[0006] A flue gas desulfurization and dust removal scrubbing tower includes a cylindrical tower body and a filter box disposed close to the side of the tower body. The filter box shares a portion of the sidewall with the tower body. The top of the tower body is a cone with its pointed end facing upwards, and the top of the cone is an upward-facing exhaust port. An air inlet is provided on the lower side of the tower body. A perforated plate in the middle of the filter box divides the filter box into an upper sludge box and a lower clear liquid box. The upper part of the sludge box has a channel leading to the inside of the tower body, and the lower edge of the channel has a guide plate extending towards the middle of the sludge box. The clear liquid box communicates with the interior of the tower body. A first perforated screen plate is provided above the air inlet, and a first downward-facing spray head is provided above the first perforated screen plate. A second perforated screen plate is provided inside the tower body near the exhaust port, and a second downward-facing spray head is provided below the second perforated screen plate near the second perforated screen plate. A combined cover is provided between the air inlet and the first perforated screen plate. The combined cover includes an upper conical cover and a lower topless cover. The topless cover has a central opening and a horizontal edge that merges with the tower body. The horizontal edge connects to the channel leading to the filter mud box. The outer edge of the conical cover is connected to the inner wall of the tower body by multiple connecting rods.

[0007] In a preferred embodiment, the filter mud box is equipped with drawers. The bottom plate of the drawers is covered with through holes running vertically through the center. There are three drawers from top to bottom. Solid particles are laid in the drawers layer by layer from bottom to top. The particles in the lower layer are smaller in diameter than those in the upper layer. The particles in the lower drawer are smaller in diameter than those in the upper drawer.

[0008] In a preferred embodiment, a third perforated plate is provided between the first spray head and the second spray head inside the tower body; a demister is provided between the second perforated plate and the exhaust port, the demister being a cone with its tip pointing upwards, and multiple connecting rods are provided along the outer edge of the bottom of the demister to connect to the inner wall of the tower body.

[0009] In a preferred embodiment, a first hydrocyclone is provided between the first spray head and the first perforated plate, and a second hydrocyclone is provided between the second spray head and the third perforated plate; the first hydrocyclone and the second hydrocyclone are disc-shaped with inclined blades symmetrically arranged around their center.

[0010] In a preferred embodiment, the first and second spray heads include a water distribution plate and multiple nozzles. The water distribution plate is circular, and the nozzles are distributed around the circumference of the water distribution plate. The water distribution plate is connected to a water pump through a pipe. Valves are provided between the first spray head and the water pump, and between the second spray head and the water pump. The water pump is connected to a pipe leading to a clear liquid tank to draw liquid from the clear liquid tank.

[0011] In a preferred embodiment, an observation and maintenance hole is provided on the side of the tower body. The height of the observation and maintenance hole is located between the air inlet and the exhaust outlet. A transparent cover plate is provided outside the observation and maintenance hole. The number of observation and maintenance holes is two to four, and they are arranged at intervals in the vertical direction.

[0012] The working principle and beneficial effects of this utility model are as follows:

[0013] The flue gas desulfurization and dust removal scrubbing tower provided by this utility model allows flue gas to enter the tower body through the inlet. After being guided by the combined hood, the gas rises and turns, passing through the first and second hydrocyclones, then through the first and second perforated screen plates, and finally through the demisting device to the exhaust port. Simultaneously, a mist of liquid is sprayed from the first or second spray head as the airflow rises. The descending liquid contacts and exchanges with the rising gas. The flowing liquid converges at the horizontal edge of the open hood, then flows down from the middle of the filter mud box through channels and guide plates. After passing through three drawers for filtration, the clear liquid flows into the clear liquid tank. The liquid in the clear liquid tank is pumped and pressurized by a water pump and then circulated for spraying. The mud-like dust deposited in the drawers can be easily removed. This flue gas desulfurization and dust removal scrubbing tower is easy to maintain and clean, saves energy, has a low failure rate, and a long service life. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0018] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention after cross-section;

[0019] In the diagram: 1. Tower body; 11. Topless cap; 12. Conical hood; 13. First perforated sieve plate; 14. First hydrocyclone; 15. Third perforated sieve plate; 16. Second hydrocyclone; 17. Second perforated sieve plate; 18. Demister; 2. Air inlet; 3. Exhaust outlet; 4. Filter box; 41. Drawer; 42. Channel; 43. Drain plate; 44. Perforated plate; 51. First spray head; 52. Second spray head; 53. Water pump; 54. Valve; 6. Observation and maintenance hole. Detailed Implementation

[0020] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0021] Please refer to Figures 1 to 4 As shown in the embodiment, this embodiment provides a flue gas desulfurization and dust removal scrubbing tower, which includes a cylindrical tower body 1 and a filter box 4 disposed close to the side of the tower body. The filter box 4 shares a portion of the sidewall with the tower body 1. The top of the tower body 1 is a cone with its pointed end facing upwards, and the top of the cone is an upward-facing exhaust port 3. An air inlet 2 is provided on the lower side of the tower body 1. A perforated plate 44 is provided in the middle of the filter box 4, dividing the filter box into an upper filter mud box and a lower clear liquid box. The upper part of the filter mud box is provided with a channel 42 leading to the interior of the tower body 1, and the lower edge of the channel 42 is provided with a guide plate 43 extending to the middle of the filter mud box. The clear liquid box communicates with the interior of the tower body 1. The tower body 1 has a first perforated plate 13 above the air inlet 2, and a first spray head 14 facing downwards above the first perforated plate 13. The tower body 1 has a second perforated plate 17 near the exhaust port 3, and a second spray head 52 facing downwards near the second perforated plate. A combined cover is provided between the air inlet 2 and the first perforated plate 13. The combined cover includes an upper conical cover 12 and a lower topless cover 11. The topless cover 11 has a central opening and a horizontal edge that merges with the tower body. The horizontal edge connects with the channel 42 leading to the filter mud box. The outer edge of the conical cover 12 is connected to the inner wall of the tower body 1 by multiple connecting rods.

[0022] In addition, a drawer 41 is provided inside the filter mud box. The bottom plate of the drawer 41 is covered with through holes running vertically. Three layers of drawers 41 are provided from top to bottom. Solid particles are laid in the drawers 41 layer by layer from bottom to top. The particles in the lower layer are smaller in diameter than those in the upper layer. The particles laid in the lower drawer 41 are smaller in diameter than those in the upper drawer 41.

[0023] Furthermore, a third perforated plate 15 is preferably provided between the first spray head 51 and the second spray head 52 inside the tower body 1. A demister 18 is preferably provided between the second perforated plate 17 and the exhaust port 3. The demister 18 is a cone with its tip pointing upwards, and multiple connecting rods are provided along the outer edge of the bottom of the demister 18 to connect to the inner wall of the tower body 1. A first cyclone separator 14 is provided between the first spray head 51 and the first perforated plate 13, and a second cyclone separator 16 is provided between the second spray head 52 and the third perforated plate 15. The first cyclone separator 14 and the second cyclone separator 16 are disc-shaped with inclined blades symmetrically arranged around their center.

[0024] The first spray head 51 and the second spray head 52 include a water distribution plate and multiple nozzles. The water distribution plate is circular, and the nozzles are distributed around the circumference of the water distribution plate. The water distribution plate is connected to the water pump 53 through a pipe. A valve 54 is provided between the first spray head 51 and the water pump 53, and between the second spray head 52 and the water pump 53. The water pump 53 is connected to a pipe leading to the clear liquid tank to draw liquid from the clear liquid tank.

[0025] To facilitate observation and maintenance, an observation and maintenance hole 6 is provided on the side of the tower body 1. The height of the observation and maintenance hole 6 is located between the air inlet 2 and the exhaust port 3. A transparent cover plate is provided outside the observation and maintenance hole 6. Preferably, the number of observation and maintenance holes 6 is set to two to four and they are spaced apart in the vertical direction.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A flue gas desulfurization and dust removal scrubbing tower, characterized in that: The system includes a cylindrical tower body and a filter box mounted close to the side of the tower body. The filter box shares a portion of the sidewall with the tower body. The top of the tower body is a cone with its pointed end facing upwards, and the apex of the cone is an upward-facing exhaust port. An air inlet is located on the lower side of the tower body. A perforated plate in the middle of the filter box divides it into an upper sludge tank and a lower clear liquid tank. The upper part of the sludge tank has a channel leading into the tower body, and the lower edge of the channel has a guide plate extending towards the middle of the sludge tank. The clear liquid tank communicates with the interior of the tower body. The tower body has an air inlet located above the air inlet. The tower is equipped with a first perforated plate, and a first spray head facing downwards is provided above the first perforated plate. A second perforated plate is provided inside the tower near the exhaust port, and a second spray head facing downwards is provided below the second perforated plate near the second perforated plate. A combined cover is provided between the air inlet and the first perforated plate. The combined cover includes an upper conical cover and a lower topless cover. The topless cover has a central opening and a horizontal edge that merges with the tower body. The horizontal edge connects to the channel leading to the filter mud box. The outer edge of the conical cover is connected to the inner wall of the tower body by multiple connecting rods.

2. The flue gas desulfurization and dust removal scrubbing tower according to claim 1, characterized in that: The filter mud box is equipped with drawers. The bottom plate of the drawers is covered with through holes running vertically through the middle. There are three layers of drawers from top to bottom. Solid particles are laid in the drawers layer by layer from bottom to top. The particles in the lower layer are smaller in diameter than those in the upper layer. The particles in the lower drawer are smaller in diameter than those in the upper drawer.

3. The flue gas desulfurization and dust removal scrubbing tower according to claim 2, characterized in that: A third perforated plate is provided between the first and second spray heads inside the tower body; a demister is provided between the second perforated plate and the exhaust port. The demister is a cone with its tip pointing upwards, and multiple connecting rods are provided along the outer edge of the bottom of the demister to connect to the inner wall of the tower body.

4. The flue gas desulfurization and dust removal scrubbing tower according to claim 3, characterized in that: A first hydrocyclone is provided between the first spray head and the first perforated plate, and a second hydrocyclone is provided between the second spray head and the third perforated plate; the first hydrocyclone and the second hydrocyclone are disc-shaped with inclined blades symmetrically arranged around their center.

5. The flue gas desulfurization and dust removal scrubbing tower according to claim 1, characterized in that: The first and second spray heads include a water distribution plate and multiple nozzles. The water distribution plate is circular, and the nozzles are distributed around the circumference of the water distribution plate. The water distribution plate is connected to a water pump through a pipe. Valves are provided between the first spray head and the water pump, and between the second spray head and the water pump. The water pump is connected to a pipe leading to a clear liquid tank to draw liquid from the clear liquid tank.

6. The flue gas desulfurization and dust removal scrubbing tower according to claim 5, characterized in that: An observation and maintenance hole is provided on the side of the tower body. The height of the observation and maintenance hole is located between the air inlet and the exhaust outlet. A transparent cover plate is provided outside the observation and maintenance hole. The number of observation and maintenance holes is two to four, and they are arranged at intervals in the vertical direction.

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