Desulfurization wastewater pretreatment device

Abstract

The utility model relates to a desulfurization wastewater pretreatment device which comprises a pretreatment tank and an overflow tank, a baffle sliding in the vertical direction is arranged on the inner side wall of the pretreatment tank, a lifting assembly for driving the baffle to ascend and descend is arranged on the pretreatment tank, and an overflow pipe communicated with the inside and the outside is arranged in the middle of the baffle. A filter plate is arranged at the inner port of the overflow pipe, a rotatable brush and a motor A for driving the scraper to rotate are arranged on the inward surface of the baffle, the rotatable brush sweeps the inward surface of the filter plate, an opening for the overflow pipe to extend out is formed in the side wall of the pretreatment tank, and the inward end of the opening is always blocked by the outward surface of the baffle. A telescopic pipe leading to an inlet of the overflow tank is arranged at an outer port of the overflow pipe, a feeding port is formed in the top of the pretreatment tank, a stirring assembly is arranged in the pretreatment tank, and a liquid inlet pipe is arranged at the top of the side wall of the pretreatment tank. The device disclosed by the utility model has the advantages of high treatment efficiency and long running time.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a pretreatment device for desulfurized wastewater. Background Art

[0002] The desulfurized wastewater of steel mills is mainly the discharged water from the absorption tower during the wet desulfurization process of boiler flue gas. The wastewater needs to be treated to a certain extent before discharge, and the pretreatment device is a commonly used treatment equipment.

[0003] The traditional pretreatment device discharges the sewage exceeding the lowest liquid level into the overflow tank through an overflow pipe. Since the position of the overflow pipe is fixed, when the amount of sediment suspended matter at the bottom increases, the possibility that the sediment suspended matter overflows the overflow pipe and hinders the sewage discharge increases. Therefore, it is necessary to frequently pause the sewage treatment to empty the sediment suspended matter, and the medicine adding port is single, resulting in that the sufficient mixing between the sewage and the medicine takes a long time, and it is difficult to improve the treatment efficiency. In addition, a filter plate for blocking impurities is provided on the overflow pipe, and the filter holes on the filter plate may be blocked by impurities. After long-term use, it is difficult for the sewage to pass through the filter plate with most of the filter holes blocked, and it is necessary to stop the machine to clean the filter plate, which limits the operation time of the device. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a pretreatment device for desulfurized wastewater, which has the advantages of high treatment efficiency and long operation time.

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

[0006] A pretreatment device for desulfurized wastewater, comprising a pretreatment tank and an overflow tank. A baffle plate that slides vertically is provided on the inner side wall of the pretreatment tank. An elevating assembly for driving the baffle plate to move up and down is provided on the pretreatment tank. An overflow pipe communicating inside and outside is provided in the middle of the baffle plate. A filter plate is provided at the inner port of the overflow pipe. A rotatable brush and a motor A for driving the brush to rotate are provided on the inner surface of the baffle plate facing inward. The rotating brush sweeps the inner surface of the filter plate. An opening for the overflow pipe to extend out is provided on the side wall of the pretreatment tank. The opening is distributed vertically, and the inner end of the opening is always blocked by the outer surface of the baffle plate. A telescopic pipe leading to the inlet of the overflow tank is provided at the outer port of the overflow pipe. A feeding port is provided at the top of the pretreatment tank. A stirring assembly is provided inside the pretreatment tank. A liquid inlet pipe is provided at the top of the side wall of the pretreatment tank. A sewage discharge pipe is provided at the bottom of the pretreatment tank. Valves are respectively provided on the liquid inlet pipe, the overflow pipe and the sewage discharge pipe.

[0007] Preferably, the lifting assembly includes a threaded rod and a motor B. A pair of symmetrically arranged threaded through-holes are provided on the baffle. The threaded through-holes are arranged vertically. A threaded rod passing through the baffle is threadedly connected to the threaded through-holes. The upper and lower ends of the threaded rod are respectively rotatably connected to the pretreatment tank. A motor B corresponding to the threaded rod is provided at the top of the pretreatment tank. The driving rod of the motor B is coaxially connected to the top end of the corresponding threaded rod.

[0008] Preferably, the stirring assembly includes a rotating rod, stirring rods and a motor C. A rotating rod is provided on the central axis inside the pretreatment tank. The upper end of the rotating rod is rotatably connected to the top inside the pretreatment tank. A motor C corresponding to the rotating rod is provided at the top of the pretreatment tank. The driving rod of the motor C is coaxially connected to the upper end of the rotating rod. A plurality of groups of stirring rods are evenly provided on the side wall of the rotating rod from top to bottom. The stirring rods in the same group are evenly distributed along the periphery of the rotating rod.

[0009] Preferably, the bottom of the pretreatment tank is in the shape of an inverted cone. The upper port of the sewage discharge pipe is communicated with the center of the bottom inside the pretreatment tank. The lower port of the sewage discharge pipe is communicated with the inlet of the sludge screw pump.

[0010] Preferably, support columns are evenly provided at the bottom of the pretreatment tank. A cross plate is connected between the support columns. The sludge screw pump is placed on the top of the cross plate.

[0011] Preferably, limiting plates are respectively provided above and below the baffle inside the pretreatment tank. When the top of the baffle abuts against the upper limiting plate, the overflow pipe abuts against the upper end of the opening. When the bottom of the baffle abuts against the lower limiting plate, the overflow pipe abuts against the lower end of the opening.

[0012] The beneficial technical effects of the present utility model are as follows:

[0013] 1. By adjusting the height of the baffle through the lifting assembly, the height of the overflow pipe can be controlled. The height of the overflow pipe can be increased according to the increase in the accumulation amount of sediment suspended matter, thereby reducing the sewage discharge frequency of the pretreatment tank and improving the treatment efficiency.

[0014] 2. The inner surface of the filter plate is swept by the brush driven by the motor A, preventing impurities blocked by the filter plate from clogging the filter holes of the filter plate, enabling the filter plate to maintain a qualified filtering capacity for a long time, and extending the operation time of the device.

[0015] 3. By the stirring assembly, the mixing speed of the sewage and the reagent is accelerated, the reaction time is reduced, and the treatment efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution of the present utility model will be further described below with reference to the drawings.

[0017] Appendix Figure 1This is the front view of the present utility model.

[0018] Appendix Figure 2 This is the sectional view of the main perspective of the present utility model.

[0019] Appendix Figure 3 For Figure 2 The enlarged view of part A of

[0020] Appendix Figure 4 This is the sectional view of the left perspective of the present utility model, and the stirring assembly is hidden in the figure.

[0021] Appendix Figure 5 This is the sectional view of the top perspective of the pretreatment tank.

[0022] In the figure: 1 - pretreatment tank, 2 - overflow tank, 3 - baffle, 4 - lifting assembly, 5 - overflow pipe, 6 - filter plate, 7 - brush, 8 - motor A, 9 - opening, 10 - telescopic pipe, 11 - feeding port, 12 - stirring assembly, 13 - liquid inlet pipe, 14 - sewage discharge pipe, 15 - valve, 16 - threaded rod, 17 - motor B, 18 - threaded through hole, 19 - rotating rod, 20 - stirring rod, 21 - motor C, 22 - support column, 23 - cross plate, 24 - sludge screw pump, 25 - limiting plate. Detailed implementation manners

[0023] The following further elaborates on the present utility model in detail in conjunction with the accompanying drawings and specific embodiments.

[0024] Embodiment:

[0025] As Figures 1 to 5 shown, this embodiment provides a desulfurization wastewater pretreatment device, including a pretreatment tank 1 and an overflow tank 2. A baffle 3 that slides vertically is provided on the inner side wall of the pretreatment tank 1. The pretreatment tank 1 is provided with a lifting assembly 4 that drives the baffle 3 to move up and down. The baffle 3 is provided with an overflow pipe 5 that communicates inside and outside in the middle. A filter plate 6 is provided at the inner port of the overflow pipe 5. A rotatable brush 7 and a motor A8 that drives the rotation of the scraper are provided on the inner surface of the baffle 3 facing inward. The rotating brush 7 sweeps the inner surface of the filter plate 6. An opening 9 for the overflow pipe 5 to extend out is provided on the side wall of the pretreatment tank 1. The opening 9 is distributed vertically, and the inner end of the opening 9 is always blocked by the outer surface of the baffle 3. The outer port of the overflow pipe 5 is provided with a telescopic pipe 10 leading to the inlet of the overflow tank 2. A feeding port 11 is provided at the top of the pretreatment tank 1. A stirring assembly 12 is provided inside the pretreatment tank 1. A liquid inlet pipe 13 is provided at the top of the side wall of the pretreatment tank 1. A sewage discharge pipe 14 is provided at the bottom of the pretreatment tank 1. Valves 15 are respectively provided on the liquid inlet pipe 13, the overflow pipe 5, and the sewage discharge pipe 14.

[0026] The height of the baffle 3 is adjusted by the lifting component 4, thereby controlling the height of the overflow pipe 5. The height of the overflow pipe 5 can be increased according to the increase in the accumulated amount of sediment and suspended matter, reducing the frequency of discharging the accumulated sediment and suspended matter from the pretreatment tank 1 and improving the treatment efficiency. The brush 7 driven by the motor A8 sweeps across the inner surface of the filter plate 6, preventing the impurities blocked by the filter plate 6 from clogging the filter holes of the filter plate 6, enabling the filter plate 6 to maintain a qualified filtering capacity for a long time and extending the operation time of the device. The mixing speed of the sewage and the medicament is accelerated by the stirring component 12, reducing the reaction time required and improving the treatment efficiency.

[0027] Further, the lifting component 4 includes a threaded rod 16 and a motor B17. A pair of symmetrically arranged threaded through holes 18 are provided on the baffle 3. The threaded through holes 18 are in the vertical direction. The threaded rod 16 is threadedly connected to the threaded through holes 18 and passes through the baffle 3. The upper and lower ends of the threaded rod 16 are respectively rotatably connected to the pretreatment tank 1. A motor B17 corresponding to the threaded rod 16 is provided at the top of the pretreatment tank 1, and the driving rod of the motor B17 is coaxially connected to the top end of the corresponding threaded rod 16.

[0028] By driving the threaded rod 16 to rotate by the motor B17, the rotating threaded rod 16 drives the baffle 3 threadedly connected thereto to move in the vertical direction, thereby achieving the effect of changing the height of the baffle 3.

[0029] Further, the stirring component 12 includes a rotating rod 19, stirring rods 20 and a motor C21. A rotating rod 19 is provided on the central axis inside the pretreatment tank 1. The upper end of the rotating rod 19 is rotatably connected to the top inside the pretreatment tank 1. A motor C21 corresponding to the rotating rod 19 is provided at the top of the pretreatment tank 1, and the driving rod of the motor C21 is coaxially connected to the upper end of the rotating rod 19. A plurality of groups of stirring rods 20 are evenly provided on the side wall of the rotating rod 19 from top to bottom, and the stirring rods 20 in the same group are evenly distributed along the periphery of the rotating rod 19.

[0030] By driving the rotating rod 19 to rotate by the motor C21, the rotating rotating rod 19 drives the connected stirring rods 20 to rotate, and the rotating stirring rods 20 stir the sewage and the medicament put into the pretreatment tank 1 to accelerate the mixing speed.

[0031] Further, the bottom of the pretreatment tank 1 is in the shape of an inverted cone. The upper port of the sewage discharge pipe 14 is communicated with the center of the bottom inside the pretreatment tank 1, and the lower port of the sewage discharge pipe 14 is communicated with the inlet of the sludge screw pump 24.

[0032] The shape of the bottom of the pretreatment tank 1 helps the sediment and suspended matter to slide towards the sewage discharge pipe 14, and the sediment and suspended matter flowing out of the sewage discharge pipe 14 can be sent to a position where it is more convenient to receive the dirt through the sludge screw pump 24.

[0033] Furthermore, support columns 22 are evenly arranged at the bottom of the pretreatment tank 1, a cross plate 23 is connected between the support columns 22, and the sludge screw pump 24 is placed on the top of the cross plate 23.

[0034] By using the support columns 22 and the cross plate 23 in combination, a stable placement surface is provided for the sludge screw pump 24.

[0035] Furthermore, limit plates 25 are respectively arranged above and below the baffle 3 inside the pretreatment tank 1. When the top of the baffle 3 abuts against the upper limit plate 25, the overflow pipe 5 abuts against the upper end of the opening 9. When the bottom of the baffle 3 abuts against the lower limit plate 25, the overflow pipe 5 abuts against the lower end of the opening 9.

[0036] By using the limit plates 25 arranged on the upper and lower sides respectively, the upper and lower limits of the adjustable height range of the baffle 3 are better defined.

[0037] The working principle and usage process of the present utility model are as follows:

[0038] Open the valve 15 of the liquid inlet pipe 13, send sewage into the pretreatment tank 1 from the liquid inlet pipe 13, add chemicals into the pretreatment tank 1 from the feeding port 11, start the stirring assembly 12 to accelerate the mixing of the sewage and the chemicals. After the sewage and the chemicals react to generate suspended matter, turn off the stirring assembly 12 and then open the valve 15 on the overflow pipe 5. The sewage is filtered by the filter plate 6 and then flows into the overflow tank 2 along the overflow pipe 5 and the telescopic pipe 10. The impurities remaining on the filter plate 6 are wiped off by the brush 7 driven by the motor A8, keeping the filter holes on the filter plate 6 unblocked. The suspended matter sinks to the bottom inside the pretreatment tank 1 under the action of gravity. After the liquid level in the pretreatment tank 1 is flush with the overflow pipe 5, new sewage and chemicals are added again. The height of the overflow pipe 5 increases with the increase in the amount of accumulated precipitated suspended matter in the pretreatment tank 1, ensuring that there is enough volume inside the pretreatment tank 1 to accommodate the sewage to be treated. When the overflow pipe 5 rises to the highest position, sewage discharge is required. During sewage discharge, the staff first opens the valve 15 on the overflow pipe 5 to discharge the reacted sewage into the overflow tank 2, then opens the valve 15 on the sewage discharge pipe 14 and starts the sludge screw pump 24 to empty the accumulated precipitated suspended matter in the pretreatment tank 1. Then, close the valves 15 on the sewage discharge pipe 14 and the overflow pipe 5 and the sludge screw pump 24, and adjust the overflow pipe 5 to the lowest height. Finally, add new sewage and chemicals to the pretreatment tank 1 after sewage discharge.

[0039] The above is only a specific application example of the present utility model, which does not constitute any limitation to the protection scope of the present utility model. Any technical solutions formed by equivalent transformation or equivalent substitution fall within the scope of the rights protection of the present utility model.

Claims

1. A desulfurization wastewater pretreatment device, characterized in that: The utility model comprises a pretreatment tank and an overflow tank, wherein a baffle which slides in a vertical direction is arranged on the inner side wall of the pretreatment tank, a lifting assembly which drives the baffle to lift and lower is arranged on the pretreatment tank, an overflow pipe which connects the inside and the outside is arranged in the middle of the baffle, a filter plate is arranged at the inner port of the overflow pipe, a rotatable brush and a motor A which drives a scraper to rotate are arranged on the inner surface of the baffle, the rotating brush sweeps the inner surface of the filter plate, an opening for extending the overflow pipe is arranged on the side wall of the pretreatment tank, the opening is distributed in the vertical direction, the inner end of the opening is always blocked by the outer side of the baffle, a telescopic pipe which leads to the inlet of the overflow tank is arranged at the outer port of the overflow pipe, a feeding port is arranged at the top of the pretreatment tank, a stirring assembly is arranged in the pretreatment tank, a liquid inlet pipe is arranged at the top of the side wall of the pretreatment tank, a sewage discharge pipe is arranged at the bottom of the pretreatment tank, and valves are respectively arranged on the liquid inlet pipe, the overflow pipe and the sewage discharge pipe.

2. A desulfurization wastewater pretreatment device according to claim 1, characterized in that: The lifting assembly includes a threaded rod and a motor B. The baffle is provided with a pair of front-to-back symmetrical threaded through holes, the threaded through holes are along the vertical direction, and the threaded through holes are threadedly connected with a threaded rod passing through the baffle. The upper and lower ends of the threaded rod are respectively rotatably connected to the pretreatment tank. The top of the pretreatment tank is provided with a motor B corresponding to the threaded rod, and the driving rod of the motor B is coaxially connected to the top end of the corresponding threaded rod.

3. A desulfurization wastewater pretreatment device according to claim 1, characterized in that: The stirring assembly includes a rotating rod, a stirring rod and a motor C. A rotating rod is provided on the central axis in the pretreatment tank. The upper end of the rotating rod is rotatably connected to the top of the pretreatment tank. A motor C corresponding to the rotating rod is provided on the top of the pretreatment tank. The driving rod of the motor C is coaxially connected to the upper end of the rotating rod. Several groups of stirring rods are evenly arranged on the side wall of the rotating rod from top to bottom, and the stirring rods of the same group are evenly distributed along the periphery of the rotating rod.

4. A desulfurization wastewater pretreatment device according to claim 1, characterized in that: The bottom of the pretreatment tank is in an inverted cone shape, the upper port of the sewage pipe is connected to the bottom center of the pretreatment tank, and the lower port of the sewage pipe is connected to the inlet of the sludge screw pump.

5. A desulfurization wastewater pretreatment device according to claim 4, characterized in that: Support columns are evenly arranged at the bottom of the pretreatment tank, and transverse plates are connected between the support columns. The sludge screw pump is placed on the top of the transverse plate.

6. A desulfurization wastewater pretreatment device according to claim 1, characterized in that: Limiting plates are provided above and below the baffle in the pretreatment tank. When the top of the baffle abuts against the upper limiting plate, the overflow pipe abuts against the upper end of the opening. When the bottom of the baffle abuts against the lower limiting plate, the overflow pipe abuts against the lower end of the opening.

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