A seawater flue gas desulfurization pump set pool structure and filter screen automatic flushing device
By installing an automatic flushing device in the seawater flue gas desulfurization system, the problem of untimely filter cleaning was solved, the filter cleaning was automated, the system's operating efficiency and intelligence level were improved, and labor costs were reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
- Filing Date
- 2025-07-23
- Publication Date
- 2026-06-23
AI Technical Summary
In existing seawater flue gas desulfurization systems, untimely or manual cleaning of filters leads to equipment blockage, increases operating costs, and reduces the system's automation and intelligence levels.
An automatic flushing device is installed at the inlet of the pump pool. Through the cooperation of valves, pipes and nozzles, the filter screen is automatically flushed. It can be operated remotely at regular intervals or at any time to remove debris from the filter screen and prevent clogging.
It improves the rinsing efficiency of the filter screen, reduces unit downtime and labor operating costs, and contributes to the construction of smart power plants.
Smart Images
Figure CN224388222U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of seawater flue gas desulfurization technology, and specifically relates to a seawater flue gas desulfurization pump group pool structure and an automatic filter washing device. Background Technology
[0002] The technical principle of seawater flue gas desulfurization is to use weakly alkaline seawater, which can absorb acidic gases, to wash the flue gas, thereby removing SO2 and particulate matter. The acidic seawater after desulfurization is then restored to its original quality through aeration, meeting discharge standards. Due to its simple process, high efficiency, and low operating costs, seawater flue gas desulfurization is the preferred flue gas desulfurization technology for power plants in coastal areas.
[0003] In the seawater flue gas desulfurization process, the seawater used for desulfurization comes from the circulating water of the turbine hall condenser. It is transported to the seawater flue gas desulfurization area through pipelines, underground channels or open channels. Some of the seawater enters the pump pool and is pressurized by the seawater booster pump. It is then transported to the spray layer of the absorption tower through the seawater pipe for desulfurization. The remaining seawater enters the aeration tank and mixes with the desulfurized acidic seawater. After passing through the aeration zone, CO2 is forcibly removed to increase the pH value of the seawater before it enters the drainage channel and is discharged into the sea.
[0004] Because seawater contains debris such as seaweed, shells, small fish, and plastic bags, an intercepting filter screen needs to be installed at the inlet of the seawater booster pump to prevent clogging. Since the filter screen requires regular cleaning, it is usually not installed at the pump inlet but at the pump pool inlet. The filter screen material needs to withstand the acidic corrosion of seawater and is typically made of FPR, 2205, or other corrosion-resistant alloys. Currently, filter screen cleaning is generally done manually, either after the unit is shut down and the pump pool is emptied, or periodically after the filter screen is lifted out of the pump pool by an electric hoist. This method presents numerous problems and inconveniences, such as untimely cleaning or the need to add an electric hoist, hoist rails, and frames. Therefore, it is necessary to explore the use of an automatic filter screen washing device to promptly flush the filter screen, prevent clogging, reduce manual operating costs, and further improve the automation and intelligence capabilities of seawater flue gas desulfurization technology. Utility Model Content
[0005] In order to solve the above-mentioned problems in the existing technology, the purpose of this utility model is to provide a seawater flue gas desulfurization pump group pool structure and an automatic filter washing device.
[0006] The technical solution adopted in this utility model is as follows:
[0007] A seawater flue gas desulfurization pump set structure and an automatic filter cleaning device are disclosed. The pump set includes an inlet pool, an upstream condenser water pipe connected to the inlet pool, an aeration pool connected to the downstream of the inlet pool, a pump set pool and a pump house. The pump set pool and the inlet pool are connected through a water distribution port, a filter screen is connected to the water distribution port, and an automatic cleaning device is installed on the filter screen. A seawater booster pump is installed in the pump house. The inlet of the seawater booster pump is connected to the pump set pool through a pipe, and the outlet of the seawater booster pump is connected to a seawater pipe of the absorption tower. The other end of the seawater pipe of the absorption tower is connected to the spray layer of the absorption tower.
[0008] This invention incorporates an automatic flushing device at the filter screen at the pump set inlet. Through the combined action of valves, pipes, and nozzles, the device automatically flushes the filter screen. Utilizing this automatic flushing device, the filter screen can be automatically flushed periodically or remotely at any time, removing debris, reducing filter screen malfunctions, eliminating the inconvenience of manual cleaning, improving filter screen flushing efficiency, reducing unit downtime, lowering labor operating costs, and contributing to the construction of smart power plants.
[0009] As a preferred embodiment of the present invention, the automatic rinsing device includes a main rinsing pipe, a plurality of rinsing branch pipes connected to the main rinsing pipe, the rinsing branch pipes being arranged in the corresponding area of the filter screen, and a plurality of nozzles being arranged on the rinsing branch pipes.
[0010] The automatic flushing device can be operated by writing commands into the operating logic to specify the flushing cycle; it can also be automatically flushed at irregular intervals based on daily inspections by operators. When using automatic control via the main flushing pipe, automatic flushing is controlled by a single automatic valve; when using separate automatic control via flushing branch pipes, typically only the valve on one flushing branch pipe is opened during flushing, and the valve on the next flushing branch pipe is opened only after one flushing branch pipe has finished flushing, and so on. The automatic flushing device is located inside the filter screen of the pump set pool, flushing back the debris remaining on the filter screen, allowing the debris to flow with the seawater into the downstream aeration tank, thus preventing the filter screen from clogging.
[0011] As a preferred embodiment of this utility model, an automatic valve is installed on the flushing main pipe, and the flushing main pipe is connected to the wall of the pump pool via a pipe support. The automatic flushing device can be automatically controlled by the flushing main pipe, with one flushing main pipe for each filter screen and one automatic valve on the flushing main pipe.
[0012] As a preferred embodiment of this utility model, an automatic valve is provided on the flushing branch pipe, and the flushing branch pipe is connected to the wall of the pump pool via a pipe support. The automatic flushing device can also be configured to automatically control each flushing branch pipe separately, with multiple flushing branch pipes for one filter screen, and one automatic valve on each flushing branch pipe.
[0013] As a preferred embodiment of this utility model, the nozzle is a jet nozzle or a small hole opened on the branch pipe.
[0014] As a preferred embodiment of this utility model, the distance between adjacent nozzles is between 400 and 1000 mm.
[0015] As a preferred embodiment of this utility model, the flushing water of the automatic flushing device comes from the flushing water of the demister in the flue gas desulfurization system or seawater in the pump pool.
[0016] As a preferred embodiment of this utility model, the condenser water inlet pipe is a pipe, an open channel, or a culvert.
[0017] As a preferred embodiment of this utility model, the pump pool, the underground part of the pump house, the inlet pool, and the aeration pool are all reinforced concrete structures, and the above-ground part of the pump house is a reinforced concrete structure or a light steel structure.
[0018] As a preferred embodiment of this utility model, the pump house and pump pool are arranged on one side, and the inlet pool is arranged on the other side.
[0019] The beneficial effects of this utility model are as follows:
[0020] This invention incorporates an automatic flushing device at the filter screen at the pump set inlet. Through the combined action of valves, pipes, and nozzles, the device automatically flushes the filter screen. Utilizing this automatic flushing device, the filter screen can be automatically flushed periodically or remotely at any time, removing debris, reducing filter screen malfunctions, eliminating the inconvenience of manual cleaning, improving filter screen flushing efficiency, reducing unit downtime, lowering labor operating costs, and contributing to the construction of smart power plants. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model;
[0022] Figure 2 This is a schematic diagram of the automatic flushing device during automatic control of the flushing main pipe;
[0023] Figure 3 This is a schematic diagram of the automatic flushing device during automatic control of the flushing branch pipe.
[0024] In the diagram: 1-Condenser water inlet pipe; 2-Inlet pool; 3-Filter screen; 4-Automatic flushing device; 5-Aeration tank; 6-Pump room; 7-Absorber seawater pipe; 8-Seawater booster pump; 9-Pump group pool; 41-Flushing main pipe; 42-Flushing branch pipe; 43-Automatic valve; 44-Nozzle; 45-Pipe support. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other.
[0027] like Figure 1 As shown, the seawater flue gas desulfurization pump group structure and automatic filter cleaning device of this embodiment include an inlet pool 2, with a condenser water pipe 1 connected upstream of the inlet pool 2 and an aeration pool 5 connected downstream of the inlet pool 2. It also includes a pump group pool 9 and a pump house 6. The pump group pool 9 is connected to the inlet pool 2 via a water distribution port, on which a filter screen 3 is connected. An automatic cleaning device 4 is installed on the filter screen 3. A seawater booster pump 8 is installed in the pump house 6. The inlet of the seawater booster pump 8 is connected to the pump group pool 9 via a pipe, and the outlet of the seawater booster pump 8 is connected to a seawater pipe 7 for the absorption tower. The other end of the seawater pipe 7 for the absorption tower is connected to the spray layer of the absorption tower. The pump house 6 and the pump group pool 9 are arranged on one side, and the inlet pool 2 is arranged on the other side.
[0028] Seawater enters the inlet pool 2 through the condenser inlet pipe 1. Part of the seawater in inlet pool 2 passes through the filter screen 3 at the distributor and enters the pump pool 9. The seawater booster pump 8 pressurizes the seawater in pump pool 9 and then transports it to the absorption tower spray layer for desulfurization via the absorption tower seawater pipe 7. The remaining seawater enters the aeration pool 5 and mixes with the desulfurized acidic seawater. After passing through the aeration zone, CO2 is forcibly removed to raise the seawater pH value before it enters the drainage channel and is discharged into the sea. The filter screen 3 filters the seawater entering pump pool 9 to prevent impurities from entering the seawater booster pump 8 and damaging the impeller.
[0029] The condenser water inlet pipe 1 can be a pipe, an open channel, or a culvert, and the material can be anti-corrosion concrete or other corrosion-resistant materials.
[0030] Pump pool 9, pump house 6, and inlet pool 2 are rectangular, but can be other shapes depending on the actual project situation.
[0031] The pump set pool 9, the pump house 6 (below ground level), the inlet pool 2, and the aeration pool 5 are reinforced concrete structures, while the pump house 6 (above ground level) can be reinforced concrete or light steel structure, etc.
[0032] The liquid levels of aeration tank 5, pump group tank 9, and inlet tank 2 are determined based on seawater elevation.
[0033] The dimensions of pump house 6 are determined based on the number and size of the seawater booster pumps 8, taking into account other equipment within pump house 6, as well as maintenance access and space. The length of pump pool 9 is generally consistent with the length of pump house 6.
[0034] The size of the inlet pool 2 is determined based on the seawater volume, and generally ensures that the medium flow velocity does not exceed 2m / s.
[0035] Specifically, such as Figure 2 and Figure 3 As shown, the automatic rinsing device 4 includes a rinsing main pipe 41, a plurality of rinsing branch pipes 42 connected to the rinsing main pipe 41, the rinsing branch pipes 42 being disposed in the corresponding area of the filter screen 3, and a plurality of nozzles 44 being disposed on the rinsing branch pipes 42.
[0036] The automatic flushing device 4 can be programmed into the operating logic to specify the flushing cycle for automatic flushing; it can also be automatically flushed at irregular intervals based on the daily inspections by operators. When the main flushing pipe 41 is used for automatic control, automatic flushing is controlled by one automatic valve 43; when the flushing branch pipes 42 are used for separate automatic control, usually only the valve on one flushing branch pipe 42 is opened during flushing, and the valve on the next flushing branch pipe 42 is opened only after one flushing branch pipe 42 has finished flushing, and so on. The automatic flushing device 4 is arranged inside the filter screen 3 of the pump group pool 9, and backwashes the debris remaining on the filter screen 3, so that the debris is carried by the seawater to the downstream aeration tank 5, thus preventing the filter screen 3 from becoming clogged.
[0037] The automatic flushing device 4 has two forms: automatic control of the main flushing pipe 41 and automatic control of the branch flushing pipe 42.
[0038] like Figure 2 As shown, the flushing main pipe 41 is automatically controlled: an automatic valve 43 is installed on the flushing main pipe 41, and the flushing main pipe 41 is connected to the wall of the pump group pool 9 through a pipe support 45. When the automatic flushing device 4 is automatically controlled by the flushing main pipe 41, one flushing main pipe 41 is provided for each filter screen 3, and one automatic valve 43 is provided on the flushing main pipe 41.
[0039] like Figure 3As shown, the flushing branch pipe 42 is automatically controlled: an automatic valve 43 is installed on the flushing branch pipe 42, and the flushing branch pipe 42 is connected to the wall of the pump pool 9 through a pipe support 45. When the automatic flushing device 4 uses each flushing branch pipe 42 for automatic control, one filter screen 3 is provided with multiple flushing branch pipes 42, and each flushing branch pipe 42 is provided with one automatic valve 43.
[0040] An automatic flushing device 4 is located inside the filter screen 3 of the pump set pool 9. It flushes away debris remaining on the filter screen 3 in the reverse direction, allowing the debris to flow with the seawater into the downstream aeration tank 5, thus preventing the filter screen 3 from becoming clogged. The flushing water for the automatic flushing device 4 can be sourced from the flushing water of the demister in the flue gas desulfurization system, reducing system configuration; alternatively, a separate flushing pump can be configured to draw and pressurize seawater from the pump set pool 9. The flushing water pressure is approximately 0.4–0.8 MPa.
[0041] The number of flushing branch pipes 42 is determined by the number of nozzles 44. One flushing branch pipe 42 can be arranged in a row of nozzles 44 or in a column of nozzles 44. The flushing main pipe 41 and flushing branch pipes 42 are made of FRP, 2205, or other corrosion-resistant alloy materials. The specifications of the flushing branch pipes 42 range from DN32 to DN100, determined by the total flushing flow rate of all nozzles 44 on a single flushing branch pipe 42, ensuring that the medium velocity inside the pipe is between 1.5 and 3 m / s.
[0042] If the flushing main pipe 41 is automatically controlled, the specifications of the flushing main pipe 41 are determined according to the number of flushing branch pipes 42 and the total flushing flow rate to ensure that the medium velocity in the pipe is between 1.5 and 3 m / s; if the flushing branch pipes 42 are automatically controlled separately, the specifications of the flushing main pipe 41 can be the same as the specifications of the flushing branch pipes 42.
[0043] Automatic valve 43 is an electric valve, pneumatic valve, or other type of valve. Automatic valve 43 is located around the pump set pool 9 in a convenient maintenance position.
[0044] The number of nozzles 44 is adjusted according to the height H and width W of the filter screen 3 to ensure that the spacing a and b between adjacent nozzles 44 is between 400 and 1000 mm. The specifications of the nozzles 44 are DN15 to DN50. The nozzles 44 can be jet nozzles 44 or other types of nozzles 44; alternatively, small holes can be directly drilled on the branch pipe without independent nozzles 44, with hole specifications of DN15 to DN50. The nozzles 44 are connected to the pipe by adhesive, threaded connection, flange connection, or welding. The outlet water pressure of the nozzles 44 is 0.2 to 0.5 MPa, and the flow rate of a single nozzle 44 is 5 to 10 m³ / h. 3 / h.
[0045] The pipe support 45 uses pipe clamps and U-bolts, and is made of 2205 stainless steel or other corrosion-resistant alloy materials. The pipe support 45 is anchored to the wall of the pump set pool 9, and can be welded to the pre-embedded parts on the pool wall or fixed to the pool wall with expansion bolts.
[0046] This invention incorporates an automatic flushing device 4 at the filter screen 3 at the inlet of the pump set pool 9. Through the combined action of valves, pipes, nozzles 44, etc., the device automatically flushes the filter screen 3. Utilizing the automatic flushing device 4, the filter screen 3 can be automatically flushed periodically or remotely at any time, removing debris, reducing filter screen 3 malfunctions, eliminating the inconvenience of manual cleaning, improving the flushing efficiency of the filter screen 3, reducing unit downtime, lowering labor operating costs, and contributing to the construction of smart power plants.
[0047] Example:
[0048] Taking a seawater flue gas desulfurization project as an example, combined with Figure 1 and Figure 2 The explanation is as follows:
[0049] In this embodiment, the condenser has an inflow of 70,560 m³ of seawater. 3 / h, condenser inlet pipe 1 is DN3000. Inlet pool 2 is 7.5m wide and 20m long. Pump group pool 99 has an internal volume of 20m × 8.8m (length × width). Pump house 6 has an internal volume of 20m × 10.5m (length × width), and is equipped with 4 seawater booster pumps 8. The seawater pipe 7 of the absorption tower is DN1000.
[0050] Pump pool 9, pump house 6, and inlet pool 2 are rectangular, while pump pool 9, pump house 6, inlet pool 2, and aeration pool 55 are reinforced concrete structures.
[0051] The highest liquid level in pump pool 9 and inlet pool 2 is 14.02m above the Yellow Sea elevation, and the highest liquid level in aeration pool 5 is 13.75m above the Yellow Sea elevation.
[0052] The pump pool 9 and the inlet pool 2 have walls that are 5.9m high and 8.8m wide, and are equipped with two filter screens 3. Each filter screen 3 is 3.5m high and 2.0m wide, and is made of FRP material.
[0053] Each filter screen 3 in the pump pool 9 is equipped with an automatic filter screen 3 washing device 4, which is automatically controlled by a single washing main pipe 41. The automatic filter screen 3 washing device 4 consists of a washing main pipe 41, washing branch pipes 42, automatic valves 43, nozzles 44, and pipe supports 45.
[0054] The flushing water source for the automatic flushing device 4 is the flushing water from the demister of the flue gas desulfurization system. A line is led from the outlet pipe of the demister flushing pump to the automatic flushing device 4.
[0055] There are a total of 28 nozzles 44, arranged in a 7×4 pattern. One flushing branch pipe 42 is arranged in a row of nozzles 44, and a total of 7 flushing branch pipes 42 are arranged. Each branch pipe is equipped with 4 nozzles 44.
[0056] The flushing main pipe 41 and flushing branch pipe 42 are made of FRP material. The flushing branch pipe 42 has a specification of DN40. The flushing main pipe 41 has a specification of DN100. The automatic valve 43 is an electric valve. The automatic valve 43 is located in a convenient maintenance position around the pump pool 9.
[0057] The spacing a and b between adjacent nozzles 44 is 500mm. Nozzle 44 is DN20. Nozzle 44 is a jet nozzle. Nozzle 44 is bonded to the pipe. The flow rate of nozzle 44 is 5m³ / h. 3 / h.
[0058] The pipe support 45 uses U-bolts and is made of 2205 stainless steel. The pipe support 45 is anchored to the wall of the pump set pool 9 and welded to the embedded parts on the pool wall.
[0059] The automatic rinsing device 4 for filter screen 3 operates at irregular intervals based on the daily inspection by the operators. The automatic rinsing is controlled by automatic valve 43.
[0060] This utility model is not limited to the above-mentioned optional embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in its shape or structure, any technical solution that falls within the scope of the claims of this utility model shall be protected by this utility model.
Claims
1. A structure for a seawater flue gas desulfurization pump group and an automatic filter washing device, characterized in that: The system includes an inlet pool (2), with a condenser water pipe (1) connected upstream of the inlet pool (2) and an aeration pool (5) connected downstream of the inlet pool (2). It also includes a pump pool (9) and a pump house (6). The pump pool (9) and the inlet pool (2) are connected through a water distribution port. A filter screen (3) is connected to the water distribution port. An automatic flushing device (4) is installed on the filter screen (3). A seawater booster pump is installed in the pump house (6). The inlet of the seawater booster pump (8) is connected to the pump pool (9) through a pipe. The outlet of the seawater booster pump (8) is connected to the seawater pipe (7) of the absorption tower. The other end of the seawater pipe (7) of the absorption tower is connected to the spray layer of the absorption tower.
2. The structure of the seawater flue gas desulfurization pump group and the automatic filter washing device according to claim 1, characterized in that: The automatic rinsing device (4) includes a rinsing main pipe (41), and a number of rinsing branch pipes (42) are connected to the rinsing main pipe (41). The rinsing branch pipes (42) are set in the corresponding area of the filter screen (3), and a number of nozzles (44) are set on the rinsing branch pipes (42).
3. The structure of a seawater flue gas desulfurization pump group and an automatic filter washing device according to claim 2, characterized in that: An automatic valve (43) is installed on the flushing main pipe (41), and the flushing main pipe (41) is connected to the wall of the pump group pool (9) through the pipe support (45).
4. The structure of a seawater flue gas desulfurization pump group and an automatic filter washing device according to claim 2, characterized in that: An automatic valve (43) is installed on the flushing branch pipe (42), and the flushing branch pipe (42) is connected to the wall of the pump pool (9) through the pipe support (45).
5. The structure of a seawater flue gas desulfurization pump group and an automatic filter washing device according to claim 2, characterized in that: The nozzle (44) is a jet nozzle (44) or a small hole opened on the branch pipe.
6. The structure of a seawater flue gas desulfurization pump group and an automatic filter washing device according to claim 2, characterized in that: The spacing between adjacent nozzles (44) is between 400 and 1000 mm.
7. The structure of a seawater flue gas desulfurization pump group and an automatic filter washing device according to claim 1, characterized in that: The flushing water of the automatic flushing device (4) comes from the flushing water of the flue gas desulfurization system demister or seawater in the pump pool (9).
8. The structure of a seawater flue gas desulfurization pump group and an automatic filter washing device according to claim 1, characterized in that: The condenser water inlet pipe (1) is a pipe, open channel or culvert.
9. The structure of a seawater flue gas desulfurization pump group and an automatic filter washing device according to claim 1, characterized in that: The pump pool (9), the pump house (6) below ground, the inlet pool (2), and the aeration pool (5) are all reinforced concrete structures, while the pump house (6) above ground is a reinforced concrete structure or a light steel structure.
10. A seawater flue gas desulfurization pump group structure and automatic filter washing device according to any one of claims 1 to 9, characterized in that: The pump house (6) and pump pool (9) are arranged on one side, and the inlet pool (2) is arranged on the other side.