A flue gas desulfurization wastewater treatment device

Abstract

The utility model discloses a kind of flue gas desulfurization wastewater treatment devices, belong to flue gas desulfurization wastewater field.The waste incineration flue gas purification is used desulfurization device, including scrubbing tower, the flue gas inlet pipe connected with scrubbing tower and the wastewater discharge pipe connected with scrubbing tower, the outside cover of flue gas inlet pipe is equipped with evaporative box, evaporative box inside is equipped with the wastewater delivery pipe connected with wastewater discharge pipe, wastewater delivery pipe is located above flue gas inlet pipe, multiple nozzles are uniformly fixed in wastewater delivery pipe bottom, evaporative box top is equipped with gas outlet, evaporative box bottom is equipped with impurity discharge pipe.The utility model is by nozzle to spray wastewater to the outer wall of high-temperature flue gas inlet pipe, make atomized wastewater droplet be evaporated rapidly, solubility solid in wastewater and suspended impurities are separated out in this evaporation process, utilize the high-temperature flue gas pipeline wall needing to be cooled and handled as heat source, provide required energy for wastewater evaporation, reduce the operation energy consumption and cost of wastewater treatment.

Description

Technical Field

[0001] This utility model relates to the field of flue gas desulfurization wastewater, and in particular to a flue gas desulfurization wastewater treatment device. Background Technology

[0002] With increasingly stringent environmental protection requirements, flue gas from coal-fired power plants, metallurgy, and chemical industries must undergo purification treatment before being emitted. Flue gas treatment is a complex and sophisticated system engineering project aimed at reducing the emission of harmful substances in flue gas and ensuring that emissions meet stringent environmental standards. Flue gas treatment systems not only relate to environmental emissions but also directly impact a company's operating costs and sustainable development. Currently, flue gas desulfurization technology is the mainstream process and is widely used, but this process continuously generates a certain amount of desulfurization wastewater.

[0003] The desulfurization process generates secondary pollution such as wastewater. To achieve the environmental protection requirement of "zero emissions", a complex wastewater treatment system needs to be built. However, the investment in the wastewater treatment system is large and the energy consumption is high, which can easily drive up the overall operating cost of flue gas treatment. Utility Model Content

[0004] This invention provides a flue gas desulfurization wastewater treatment device, which can solve the problem that existing desulfurization devices for waste incineration flue gas purification require the construction of complex wastewater treatment systems, thus increasing the overall operating cost of flue gas treatment.

[0005] A flue gas desulfurization wastewater treatment device includes a scrubbing tower, a flue gas inlet pipe connected to the scrubbing tower, and a wastewater outlet pipe connected to the scrubbing tower. An evaporation box is provided on the outside of the flue gas inlet pipe. A wastewater conveying pipe connected to the wastewater outlet pipe is fixed inside the evaporation box. The wastewater conveying pipe is located above the flue gas inlet pipe. Multiple nozzles are uniformly fixed at the bottom of the wastewater conveying pipe. A gas outlet is provided at the top of the evaporation box, and an impurity outlet pipe is provided at the bottom of the evaporation box.

[0006] Preferably, a conveying pump is provided on one side of the washing tower, a conveying pipe is fixedly provided at the inlet end of the conveying pump, the conveying pipe is connected to the wastewater discharge pipe through a filter assembly, and the wastewater conveying pipe is connected to the outlet of the conveying pump.

[0007] Preferably, the filtration assembly includes a filter cylinder disposed on one side of the delivery pump, the wastewater discharge pipe is connected to the top of the filter cylinder, the delivery pipe is connected to the bottom of the filter cylinder, and the filter cylinder contains a filter medium.

[0008] Preferably, the filter medium includes a support filter screen fixed on the inner wall of the filter cylinder, a garnet layer above the support filter screen, a quartz sand layer above the garnet layer, and an anthracite layer above the quartz sand layer.

[0009] Preferably, a cleaning inlet pipe and a sewage outlet pipe are fixedly provided on the side wall of the filter cylinder, the cleaning inlet pipe being located below the supporting filter screen and the sewage outlet pipe being located above the anthracite coal seam.

[0010] Preferably, a cleaning component is provided inside the evaporator housing and on the side near the flue gas inlet pipe. The cleaning component is used to clean the outer surface of the flue gas inlet pipe. The cleaning component includes a cleaning ring sleeved on the outside of the flue gas inlet pipe and a drive component for driving the cleaning ring to move horizontally.

[0011] Preferably, the drive assembly includes two movable rods symmetrically slidably connected to the side wall of the evaporator box, the movable rods being arranged parallel to the flue gas inlet pipe, and the cleaning ring being fixed to one end of the movable rods.

[0012] Preferably, the ends of the movable rod and the cleaning ring opposite each other extend to the outside of the evaporator body and are both fixed with an operating handle.

[0013] Preferably, a condenser is provided on one side of the evaporator box, and an exhaust pipe connected to the condenser is fixed on the gas outlet.

[0014] Preferably, the nozzle is an impact-type water mist nozzle.

[0015] This utility model provides a flue gas desulfurization wastewater treatment device, which has the following beneficial effects: 1. Wastewater discharged from the wastewater discharge pipe is transported through the wastewater conveying pipe and finally sprayed onto the outer wall of the high-temperature flue gas inlet pipe through multiple nozzles. The heat provided by the high-temperature flue gas pipe wall causes the atomized wastewater droplets to evaporate rapidly, and the water is converted into water vapor, which is discharged through the gas outlet at the top of the evaporation chamber. Dissolved solids and suspended impurities in the wastewater precipitate out during this evaporation process and slide down the inner wall of the evaporation chamber under gravity, eventually being periodically discharged from the system through the impurity discharge pipe at its bottom. By utilizing the high-temperature flue gas pipe wall, which requires cooling and post-treatment, as a heat source, the energy required for wastewater evaporation is provided, reducing the energy consumption and cost of wastewater treatment operation.

[0016] 2. By pushing and pulling the operating handle horizontally on the outside, the movable rod and the cleaning ring on it can be driven to move back and forth along the axial direction of the flue gas inlet pipe, thereby achieving a comprehensive cleaning of the outer wall of the pipe. The debris that falls off can be discharged through the impurity drain pipe, which can remove dust, scale or residue that may accumulate on the outer surface of the flue gas inlet pipe during long-term operation, ensuring its heat transfer efficiency. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of a flue gas desulfurization wastewater treatment device provided by this utility model. Figure 1 ; Figure 2 A schematic diagram of the structure of a flue gas desulfurization wastewater treatment device provided by this utility model. Figure 2 ; Figure 3 A schematic diagram of the internal cross-sectional structure of the filter cylinder of a flue gas desulfurization wastewater treatment device provided by this utility model; Figure 4 This is a cross-sectional structural diagram of the evaporator body of a flue gas desulfurization wastewater treatment device provided by this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Scrubber; 2. Flue gas inlet pipe; 3. Evaporator; 4. Wastewater conveying pipe; 5. Nozzle; 6. Wastewater discharge pipe; 7. Conveyor pump; 8. Filter cartridge; 9. Exhaust pipe; 10. Condenser; 11. Operating handle; 12. Cleaning ring; 13. Movable rod; 14. Impurity discharge pipe; 15. Bearing filter screen; 16. Anthracite seam; 17. Quartz sand layer; 18. Garnet layer; 19. Cleaning inlet pipe; 20. Sewage discharge pipe; 21. Conveying pipeline. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below, but it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0020] like Figures 1 to 4 As shown in the figure, the flue gas desulfurization wastewater treatment device provided by this utility model includes a scrubbing tower 1, a flue gas inlet pipe 2 connected to the scrubbing tower 1, and a wastewater outlet pipe 6 connected to the scrubbing tower 1. An evaporation box 3 is provided on the outside of the flue gas inlet pipe 2. A wastewater conveying pipe 4 connected to the wastewater outlet pipe 6 is fixed inside the evaporation box 3. The wastewater conveying pipe 4 is located above the flue gas inlet pipe 2. Multiple nozzles 5 are evenly fixed at the bottom of the wastewater conveying pipe 4. A gas outlet is provided at the top of the evaporation box 3, and an impurity outlet pipe 14 is provided at the bottom of the evaporation box 3.

[0021] Wastewater discharged from wastewater drain pipe 6 is transported via wastewater conveying pipe 4 and finally sprayed onto the outer wall of high-temperature flue gas inlet pipe 2 through multiple nozzles 5. The heat provided by the high-temperature flue gas pipe wall causes the atomized wastewater droplets to evaporate rapidly, the water is converted into water vapor, and discharged through the gas outlet at the top of the evaporation chamber 3. Dissolved solids and suspended impurities in the wastewater precipitate out during this evaporation process and slide down the inner wall of the evaporation chamber 3 under gravity, and are eventually discharged from the system periodically through the impurity drain pipe 14 at its bottom. By utilizing the high-temperature flue gas pipe wall that requires cooling and post-treatment as a heat source, the energy required for wastewater evaporation is provided, reducing the energy consumption and cost of wastewater treatment operation.

[0022] In some specific implementation plans, such as Figure 2 As shown, a condenser 10 is provided on one side of the evaporator box 3, and an exhaust pipe 9 connected to the condenser 10 is fixed on the gas outlet.

[0023] During operation, the steam generated inside the evaporator 3 is introduced into the condenser 10 through the exhaust pipe 9 for cooling and condensation into distilled water for further processing and utilization.

[0024] In some specific implementation plans, such as Figure 1 and Figure 3 As shown, a conveying pump 7 is provided on one side of the washing tower 1. A conveying pipe 21 is fixedly installed at the inlet end of the conveying pump 7. The conveying pipe 21 is connected to the wastewater discharge pipe 6 through a filter assembly. The wastewater conveying pipe 4 is connected to the outlet of the conveying pump 7. The filter assembly includes a filter cylinder 8 located on one side of the conveying pump 7. The wastewater discharge pipe 6 is connected to the top of the filter cylinder 8, and the conveying pipe 21 is connected to the bottom of the filter cylinder 8. The filter cylinder 8 contains a filter medium, which includes a support filter screen 15 fixed on the inner wall of the filter cylinder 8, a garnet layer 18 located above the support filter screen 15, a quartz sand layer 17 located above the garnet layer 18, and an anthracite layer 16 located above the quartz sand layer 17.

[0025] The transfer pump 7 transports the wastewater discharged from the washing tower 1 to the evaporation tank 3, during which the filter assembly is used to pre-treat the wastewater. The filter cartridge 8 receives the wastewater to be treated from the wastewater discharge pipe 6, and passes it from top to bottom through the anthracite layer 16, the quartz sand layer 17, and the garnet layer 18. The different suspended solids of different particle sizes are removed by the sequential removal of each layer of media, thereby achieving filtration and purification. This helps protect the subsequent transfer pump 7, pipelines, and other components, and reduces the processing load on the subsequent system.

[0026] In some specific implementation plans, such as Figure 1 and Figure 3 As shown, a cleaning inlet pipe 19 and a sewage outlet pipe 20 are fixed on the side wall of the filter cylinder 8. The cleaning inlet pipe 19 is located below the carrying filter screen 15, and the sewage outlet pipe 20 is located above the anthracite coal seam 16.

[0027] The filter cartridge 8 is equipped with a cleaning inlet pipe 19 and a sewage outlet pipe 20 on its side wall. When cleaning the filter media, a backwashing operation is performed. The cleaning water flows through the cleaning inlet pipe 19 and is injected under high pressure to rinse the filter media from bottom to top. After the trapped pollutants are washed away, the sewage is discharged through the sewage outlet pipe 20, thus achieving efficient cleaning of the filter media.

[0028] In some specific implementation plans, such as Figure 2 and Figure 4As shown, a cleaning assembly is provided inside the evaporator housing 3, near the flue gas inlet pipe 2. This assembly cleans the outer surface of the flue gas inlet pipe 2 and includes a cleaning ring 12 fitted onto the outside of the flue gas inlet pipe 2 and a drive assembly for horizontally moving the cleaning ring 12. The drive assembly includes two symmetrically slidably connected movable rods 13 to the side wall of the evaporator housing 3. The movable rods 13 are parallel to the flue gas inlet pipe 2. The cleaning ring 12 is fixed to one end of each movable rod 13. The inner diameter of the cleaning ring 12 is slightly larger than the outer diameter of the flue gas inlet pipe 2, ensuring smooth movement while effectively scraping away deposits. The ends of the movable rods 13 and the cleaning ring 12 extend to the outside of the evaporator housing 3 and are both fixed with an operating handle 11. The movable rods 13 pass through the side wall of the housing via a sealing bushing.

[0029] The cleaning assembly is mainly used to remove dust, scale, or residue that may accumulate on the outer surface of the flue gas inlet pipe 2 during long-term operation, ensuring its heat transfer efficiency. By pushing and pulling the operating handle 11 horizontally on the outside, the operator can drive the movable rod 13 and its cleaning ring 12 to reciprocate along the axial direction of the flue gas inlet pipe 2, thereby achieving a comprehensive cleaning of the outer wall of the pipe. The debris that falls off can be discharged through the impurity drain pipe 14.

[0030] In some specific implementation plans, such as Figure 4 As shown, nozzle 5 is an impact-type water mist nozzle. An impact plate (which can be made of stainless steel, ceramic, or other materials) is installed below nozzle 5. Its shape can be flat, concave, or curved with a specific pattern to guide the atomized water mist to diffuse in a specific direction. High-pressure wastewater forms water mist through nozzle 5 to better contact the flue gas inlet pipe 2.

[0031] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios: The transfer pump 7 transports the wastewater discharged from the washing tower 1 to the evaporation tank 3, during which the filter assembly is used to pre-treat the wastewater. The filter cartridge 8 receives the wastewater to be treated from the wastewater discharge pipe 6, and passes it from top to bottom through the anthracite layer 16, the quartz sand layer 17, and the garnet layer 18. The different suspended solids of different particle sizes are removed by the sequential removal of each layer of media, thereby achieving filtration and purification. This helps protect the subsequent transfer pump 7, pipelines, and other components, and reduces the processing load on the subsequent system.

[0032] Wastewater is transported via wastewater delivery pipe 4 and ultimately sprayed onto the outer wall of the high-temperature flue gas inlet pipe 2 through multiple nozzles 5. The heat provided by the high-temperature flue gas pipe wall causes the atomized wastewater droplets to evaporate rapidly, converting the water into water vapor, which is then discharged through the gas outlet at the top of the evaporation chamber 3. Dissolved solids and suspended impurities in the wastewater precipitate out during this evaporation process and slide down the inner wall of the evaporation chamber 3 under gravity, eventually being periodically discharged from the system through the impurity drain pipe 14 at its bottom. The steam generated inside the evaporation chamber 3 is introduced into the condenser 10 through the exhaust pipe 9 for cooling treatment, condensing into distilled water for further processing and utilization.

[0033] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A flue gas desulfurization wastewater treatment device, comprising a scrubbing tower (1), a flue gas inlet pipe (2) connected to the scrubbing tower (1), and a wastewater outlet pipe (6) connected to the scrubbing tower (1), characterized in that, An evaporator (3) is provided on the outside of the flue gas inlet pipe (2). A wastewater conveying pipe (4) connected to the wastewater discharge pipe (6) is fixed inside the evaporator (3). The wastewater conveying pipe (4) is located above the flue gas inlet pipe (2). Multiple nozzles (5) are evenly fixed at the bottom of the wastewater conveying pipe (4). A gas outlet is provided at the top of the evaporator (3). An impurity discharge pipe (14) is provided at the bottom of the evaporator (3).

2. A flue gas desulphurization wastewater treatment apparatus as claimed in claim 1, characterized in that A conveying pump (7) is provided on one side of the washing tower (1). A conveying pipe (21) is fixed at the inlet end of the conveying pump (7). The conveying pipe (21) is connected to the wastewater discharge pipe (6) through a filter assembly. The wastewater conveying pipe (4) is connected to the outlet of the conveying pump (7).

3. The flue gas desulfurization wastewater treatment device as described in claim 2, characterized in that, The filter assembly includes a filter cylinder (8) located on one side of the delivery pump (7), the wastewater discharge pipe (6) is connected to the top of the filter cylinder (8), the delivery pipe (21) is connected to the bottom of the filter cylinder (8), and the filter cylinder (8) contains a filter medium.

4. A flue gas desulphurization wastewater treatment apparatus as claimed in claim 3, wherein The filter media includes a carrier filter screen (15) fixed on the inner wall of the filter cylinder (8), a garnet layer (18) above the carrier filter screen (15), a quartz sand layer (17) above the garnet layer (18), and an anthracite layer (16) above the quartz sand layer (17).

5. A flue gas desulphurization wastewater treatment apparatus as claimed in claim 4, wherein, A cleaning inlet pipe (19) and a sewage outlet pipe (20) are fixedly provided on the side wall of the filter cylinder (8). The cleaning inlet pipe (19) is located below the carrying filter screen (15), and the sewage outlet pipe (20) is located above the anthracite coal seam (16).

6. The flue gas desulfurization wastewater treatment device as described in claim 1, characterized in that, The evaporator box (3) is provided with a cleaning component inside and on the side near the flue gas inlet pipe (2). The cleaning component is used to clean the outer surface of the flue gas inlet pipe (2). The cleaning component includes a cleaning ring (12) sleeved on the outside of the flue gas inlet pipe (2) and a drive component for driving the cleaning ring (12) to move horizontally.

7. The flue gas desulfurization wastewater treatment device as described in claim 6, characterized in that, The drive assembly includes two movable rods (13) symmetrically slidably connected to the side wall of the evaporator box (3). The movable rods (13) are arranged parallel to the flue gas inlet pipe (2), and the cleaning ring (12) is fixed on one end of the movable rods (13).

8. The flue gas desulfurization wastewater treatment device as described in claim 7, characterized in that, The movable rod (13) and the cleaning ring (12) both extend to the outside of the evaporator body (3) and are both fixed with an operating handle (11).

9. A flue gas desulfurization wastewater treatment apparatus according to claim 1, wherein A condenser (10) is provided on one side of the evaporator box (3), and an exhaust pipe (9) connected to the condenser (10) is fixed on the gas outlet.

10. A flue gas desulphurization wastewater treatment apparatus as claimed in claim 9, wherein, The nozzle (5) is an impact water mist nozzle.

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