Wastewater treatment plant for scrub column effluent

Abstract

This utility model relates to the field of wastewater treatment technology and discloses a wastewater treatment device for scrubbing tower wastewater. It includes a sludge tank body, an aeration assembly mounted on the sludge tank body, an additive assembly mounted outside the sludge tank body, a filter press assembly mounted outside the sludge tank body, a first connecting pipe fixedly connected to the sludge tank body, a flow meter body mounted on the first connecting pipe, a first motor fixedly connected to the sludge tank body, and a threaded rod fixedly connected to the output end of the first motor. When the flow meter body is working, wastewater enters the sludge tank body for treatment in 10-ton units. Simultaneously with the aeration assembly, the additive assembly adds polyaluminum chloride, which adsorbs and precipitates crystals, adjusting the pH to create an optimal environment for coagulation. This allows more pollutants to be encapsulated and settled by the flocs, reducing the pollutant content in the effluent and minimizing reagent waste. This reduces costs and lightens the load on subsequent filter presses, making the process more efficient and stable.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment, and in particular to a wastewater treatment device for waste liquid from a scrubbing tower. Background Technology

[0002] In the production process of high-purity quartz sand, wastewater treatment is an essential aspect that cannot be ignored, especially the large amount of acidic and fluoride-containing wastewater generated during production. If this type of wastewater is discharged directly without proper treatment, it will cause serious environmental pollution, particularly threatening the ecological balance of water bodies and soil.

[0003] In existing technologies, conventional treatment methods first involve pre-treating wastewater in an equalization tank. This step aims to balance the pH value and suspended solids content of the wastewater, creating favorable conditions for subsequent treatment. However, in actual use, the scrubbing tower, as part of the production process, already consumes some acidic substances in its wastewater discharge. This means that when this wastewater is mixed with the main production wastewater, the overall acidity of the wastewater decreases. Due to the reduced acidity, the required amount of quicklime is correspondingly reduced. To ensure that fluoride ions can be completely removed to below the safe discharge standard, it is often necessary to maintain a certain calcium ion concentration to promote the formation of calcium fluoride precipitate. Therefore, relying solely on adjusting the amount of quicklime added based on the acidity of the wastewater itself is often insufficient to achieve the desired fluoride removal effect. To solve this problem, additional measures must be taken in actual operation, namely, adding acidic substances to the treatment system to enhance the neutralization reaction and thereby increase the effective concentration of calcium ions. However, this approach undoubtedly increases the cost of reagent use, and the addition of acid also leads to an increase in the salinity of the effluent, which will adversely affect subsequent wastewater treatment or reuse. Therefore, it is necessary to improve the wastewater treatment device for the scrubbing tower wastewater to solve the above problems. Utility Model Content

[0004] In order to overcome the problem that relying on the acidity of the wastewater itself to adjust the amount of quicklime added is difficult to achieve the ideal defluorination effect, and that additional acid replenishment will increase the cost of the reagents.

[0005] The technical solution of this utility model is as follows: a wastewater treatment device for scrubbing tower waste liquid, including a sludge tank body, and further including an aeration component installed on the sludge tank body, an additive component installed outside the sludge tank body, a filter press component installed outside the sludge tank body, a first connecting pipe fixedly connected to the sludge tank body, a flow meter body installed on the first connecting pipe, a first motor fixedly connected to the sludge tank body, a threaded rod fixedly connected to the output end of the first motor, a sprocket fixedly connected to the threaded rod, a chain meshing with the sprocket, a connecting seat threadedly connected to the threaded rod, and a first push plate fixedly connected to the connecting seat. The threaded rod is rotatably connected to the sludge tank body, and the connecting seat is slidably connected to the sludge tank body. The first motor drives the threaded rod to rotate, the first motor drives the connecting seat to slide, and the sliding of the connecting seat drives the first push plate to move.

[0006] Preferably, the sludge tank body has a guide groove at the relative position of the connecting seat, and the connecting seat is slidably connected to the groove.

[0007] Preferably, there are two threaded rods and two sprockets. The two threaded rods are symmetrically rotated and connected to the sludge tank body, and the two sprockets are fixedly connected to the two threaded rods respectively, with the chain meshing between the two sprockets.

[0008] Preferably, the aeration assembly includes an air compressor body disposed outside the sludge tank body, a second connecting pipe fixedly connected to the sludge tank body, a second connecting pipe fixedly connected between the second connecting pipe and the air compressor body, an aerator body disposed on the second connecting pipe, and air compressed by the air compressor body is transported to the aerator body through the third connecting pipe and the second connecting pipe, and the gas is discharged by the operation of the aerator body.

[0009] Preferably, the added components include a storage tank body disposed outside the sludge tank body, a first extraction pump body disposed on the storage tank body, a fourth connecting pipe fixedly connected between the first extraction pump body and the storage tank body, a fifth connecting pipe fixedly connected between the first extraction pump body and the sludge tank body, and a first one-way valve disposed on the fifth connecting pipe. The first extraction pump body extracts the polymerized alumina stored inside the storage tank body and transports it to the inside of the sludge tank body through the fourth and fifth connecting pipes.

[0010] Preferably, the filter press assembly includes a discharge port fixedly connected to the sludge tank body, a filter press body disposed outside the sludge tank body, a diaphragm pump body fixedly connected to the filter press body and the discharge port, a first telescopic rod disposed on the filter press body, a second push plate fixedly connected to one end of the first telescopic rod, a filter plate body disposed on the filter press body, and a collection frame slidably connected to the filter press body. The diaphragm pump body extracts sludge and transports it to the filter press body, and the first telescopic rod pushes the second push plate to move, thereby squeezing the filter plate body.

[0011] Preferably, the filter press body has a guide groove at the relative position of the second push plate, and the second push plate is slidably connected to the groove.

[0012] Preferably, the filter press body has a storage groove at the relative position of the collection frame, and the collection frame is slidably connected to the groove.

[0013] The beneficial effects of this utility model are:

[0014] When the flow meter is working, sewage enters the sludge tank in 10-ton units for treatment. While the aeration components are working, the addition of polyaluminum chloride and adsorption crystals also adjust the pH to create the optimal environment for coagulation. This allows more pollutants to be encapsulated and settled by the flocs, reducing the pollutant content in the effluent, reducing chemical waste, lowering costs, and reducing the burden on subsequent filter presses, making the process more efficient and stable.

[0015] After sludge settles, the diaphragm pump pumps the sludge into the filter press for filtration, forming a filter cake with low moisture content. This significantly reduces the volume of the sludge, making it easier to transport and dispose of, reducing the land occupied by sludge storage, and lowering the risk of secondary pollution. Furthermore, after treatment and degradation by the aeration and additive components, the fluoride ion concentration in the filtrate is approximately 6 mg / L, avoiding the damage to the aquatic ecosystem caused by excessive fluoride ion discharge, protecting aquatic life, and making the entire wastewater treatment process more efficient, economical, and environmentally friendly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment of the wastewater treatment device for the waste liquid from the washing tower of this utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure of the sludge tank body and its connected components;

[0018] Figure 3 This is a schematic diagram of the structure of the first motor and its connected components according to this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the aeration component of this utility model;

[0020] Figure 5 A schematic diagram of the structure with added components for this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the filter press assembly of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Sludge tank body; 21. First connecting pipe; 22. Flow meter body; 23. First motor; 24. Threaded rod; 25. Sprocket; 26. Chain; 27. Connecting seat; 28. First push plate; 29. ​​Air compressor body; 210. Second connecting pipe; 211. Third connecting pipe; 212. Aerator body; 213. Chemical storage tank body; 214. First extraction pump body; 215. Fourth connecting pipe; 216. Fifth connecting pipe; 217. First one-way valve; 31. Discharge port; 32. Filter press body; 33. Diaphragm pump body; 34. First telescopic rod; 35. Second push plate; 36. Filter plate body; 37. Collection frame. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please see Figure 1 - Figure 6This utility model provides an embodiment of a wastewater treatment device for scrubbing tower wastewater, including a sludge tank body 1, an aeration assembly mounted on the sludge tank body 1, an additive assembly mounted outside the sludge tank body 1, a filter press assembly mounted outside the sludge tank body 1, a first connecting pipe 21 fixedly connected to the sludge tank body 1, a flow meter body 22 mounted on the first connecting pipe 21, a first motor 23 fixedly connected to the sludge tank body 1, a threaded rod 24 fixedly connected to the output end of the first motor 23, a sprocket 25 fixedly connected to the threaded rod 24, a chain 26 meshing with the sprocket 25, a connecting seat 27 threadedly connected to the threaded rod 24, and a first push plate 28 fixedly connected to the connecting seat 27. The threaded rod 24 is rotatably connected to the sludge tank body 1, and the connecting seat 27 is slidably connected to the sludge tank body 1. The first motor 23 drives the threaded rod 24 to rotate, and the first motor 23 drives the... The movable connecting seat 27 slides, which drives the first push plate 28 to move. The wastewater from the washing tower is pumped through the washing tower collection tank lift pump and transported to the sludge tank through the first connecting pipe 21. When passing through the first connecting pipe 21, the flow meter body 22 measures the wastewater and allows it to enter the sludge tank in units of 10 tons. At this time, the pH of the sludge tank is about 13. At the same time, the aeration device is started and the additive component adds polyaluminum chloride and adsorbs and precipitates crystals to adjust the pH value and optimize the coagulation process. When the pH is adjusted to about 8, the additive component and the aeration device are turned off to allow the sludge to settle. After settling, the first motor 23 works and drives the threaded rods 24 on both sides to rotate synchronously through the two sprockets 25 and the chain 26, thereby driving the connecting seat 27 to move. When the connecting seat 27 moves, it drives the first push plate 28 to loosen the sludge. After opening the filter press assembly and transferring the sludge into the filter press assembly, the wastewater is filtered.

[0025] Please see Figure 1 - Figure 5In this embodiment, preferably, the sludge tank body 1 has a guide groove at the relative position of the connecting seat 27. The connecting seat 27 is slidably connected to the groove, and the groove guides the sliding of the connecting seat 27 to prevent it from tilting during sliding, which would affect its ability to push the sludge with the first push plate 28. Two threaded rods 24 and two sprockets 25 are provided. The two threaded rods 24 are symmetrically rotatably connected to the sludge tank body 1, and the two sprockets 25 are respectively fixedly connected to the two threaded rods 24. The chain 26 meshes between the two sprockets 25. The two sprockets 25 and the chain 26 cooperate to form a chain. The aeration assembly includes an air compressor body 29 located outside the sludge tank body 1, a second connecting pipe 210 fixedly connected to the sludge tank body 1, a second connecting pipe 210 fixedly connected between the second connecting pipe 210 and the air compressor body 29, and an aerator body 212 set on the second connecting pipe 210. Air is compressed by the air compressor body 29 and transported to the aerator body 212 through the third connecting pipe 211 and the second connecting pipe 210. The air is compressed by the air compressor body 29 and transported to the aerator body 212 through the third connecting pipe 211 and the second connecting pipe 210. There are 12 locations, and the gas is discharged through the operation of the aerator body 212. The dissolved oxygen content of the water in the tank is increased by the aeration components, creating a suitable environment for microbial activity and promoting the degradation of organic pollutants in the waste liquid by microorganisms. The additive components include a chemical storage tank body 213 set outside the sludge tank body 1, a first extraction pump body 214 set on the chemical storage tank body 213, a fourth connecting pipe 215 fixedly connected between the first extraction pump body 214 and the chemical storage tank body 213, and a fifth connecting pipe 216 fixedly connected between the first extraction pump body 214 and the sludge tank body 1. The first one-way valve 217, installed on the fifth connecting pipe 216, draws the polyalumina stored inside the storage tank 213 through the first extraction pump body 214, and transports it to the sludge tank body 1 through the fourth connecting pipe 215 and the fifth connecting pipe 216. Polyaluminum chloride is added by adding components, and adsorption and precipitation crystals are also added. Due to the high efficiency of polyaluminum chloride flocculation performance combined with the synergistic effect of adsorption and precipitation crystals, less reagent dosage is required to achieve the same treatment effect, which reduces the operating cost of sewage treatment and also reduces the secondary pollution to the environment that may be caused by excessive reagents.

[0026] Please see Figure 1 , Figure 6In this embodiment, the filter press assembly includes a discharge port 31 fixedly connected to the sludge tank body 1, a filter press body 32 disposed outside the sludge tank body 1, a diaphragm pump body 33 fixedly connected between the filter press body 32 and the discharge port 31, a first telescopic rod 34 disposed on the filter press body 32, a second push plate 35 fixedly connected to one end of the first telescopic rod 34, a filter plate body 36 disposed on the filter press body 32, and a collection frame 37 slidably connected to the filter press body 32. The diaphragm pump body 33 extracts sludge and transports it to the filter press body 32. The first telescopic rod 34 pushes the second push plate 35 to move, and the second push plate 35 moves to squeeze the filter plate body 36. The filter press assembly filters the sludge, forcibly separating the water in the sludge to form a water-containing filter. The filter cake with a lower efficiency has a significantly reduced volume compared to the wet sludge before filtration, greatly reducing the transportation, storage, and disposal costs of sludge. It also creates favorable conditions for subsequent sludge treatment such as landfill, incineration, or resource utilization. The filter press body 32 has a guide groove at the relative position of the second push plate 35. The second push plate 35 is slidably connected to the groove. The groove guides the sliding of the second push plate 35, preventing the second push plate 35 from deviating and affecting its subsequent compression of the filter plate body 36. The filter press body 32 has a storage groove at the relative position of the collection frame 37. The collection frame 37 is slidably connected to the groove. After the position of the collection frame 37 is restricted by the groove, the collection frame 37 collects the sludge cake after filtration, so that the staff can take the sludge cake for subsequent processing.

[0027] During operation, the wastewater from the scrubbing tower is pumped through the scrubbing tower collection tank lift pump to the sludge tank via the first connecting pipe 21. As it passes through the first connecting pipe 21, the flow meter body 22 measures the wastewater, ensuring it enters the sludge tank in 10-ton increments. At this point, the pH of the sludge tank is approximately 13. The air compressor body 29 and the first extraction pump body 214 are then activated. The air compressor body 29 compresses air and delivers it to the aerator body 212 via the third connecting pipe 211 and the second connecting pipe 210. The aerator body 212 sprays air to increase the dissolved oxygen content in the tank. The first extraction pump body 214 collects polyaluminum chloride and adsorbed crystals from the storage tank body 213 and transports them to the sludge tank via the fourth connecting pipe 215 and the fifth connecting pipe 216. Inside the sludge tank body 1, the pH value is adjusted to optimize the coagulation process. When the pH is adjusted to around 8, the additive components and aeration devices are turned off to allow the sludge to settle. After settling, the first motor 23 operates, and through the cooperation of two sprockets 25 and chain 26, it drives the threaded rods 24 on both sides to rotate synchronously, thereby driving the connecting seat 27 to move. When the connecting seat 27 moves, it drives the first push plate 28 to loosen the sludge. Then, by starting the diaphragm pump body 33, the sludge is extracted and pumped into the filter plate body 36 on the filter press body 32. Then, through the operation of the first telescopic rod 34, the second push plate 35 is pushed out, and through the movement of the second push plate 35, the filter plate body 36 is squeezed to filter the sludge. After filtration, the sludge liquid and sludge cake squeezed out are collected by the collection frame 37. The fluoride ion concentration in the filtrate is about 6 mg / L, which can be discharged normally.

[0028] Through the above steps, when the flow meter body 22 is working, the sewage enters the sludge tank body 1 in units of 10 tons for treatment. While the aeration components are working, the addition components also work to add polyaluminum chloride and adsorb and precipitate crystals. This solves the problem that it is difficult to achieve the ideal defluoridation effect by adjusting the amount of quicklime added based on the acidity of the wastewater itself, and that additional acid replenishment will increase the cost of the reagents.

Claims

1. A wastewater treatment device for scrubbing tower wastewater, comprising a sludge tank body (1), characterized in that: It also includes an aeration assembly installed on the sludge tank body (1), an additive assembly installed outside the sludge tank body (1), a filter press assembly installed outside the sludge tank body (1), a first connecting pipe (21) fixedly connected to the sludge tank body (1), a flow meter body (22) installed on the first connecting pipe (21), a first motor (23) fixedly connected to the sludge tank body (1), a threaded rod (24) fixedly connected to the output end of the first motor (23), and a sprocket (25) fixedly connected to the threaded rod (24). A chain (26) meshes with a sprocket (25), a connecting seat (27) is threaded onto a threaded rod (24), a first push plate (28) is fixedly connected to the connecting seat (27), the threaded rod (24) is rotatably connected to the sludge tank body (1), the connecting seat (27) is slidably connected to the sludge tank body (1), the threaded rod (24) is rotated by the operation of the first motor (23), the connecting seat (27) is slid by the operation of the first motor (23), and the first push plate (28) is moved by the sliding of the connecting seat (27).

2. The wastewater treatment device for the scrubbing tower waste liquid according to claim 1, characterized in that: The sludge tank body (1) has a guide groove at the relative position of the connecting seat (27), and the connecting seat (27) is slidably connected to the groove.

3. The wastewater treatment device for the scrubbing tower waste liquid according to claim 1, characterized in that: Two threaded rods (24) and two sprockets (25) are provided. The two threaded rods (24) are symmetrically rotated and connected to the sludge tank body (1). The two sprockets (25) are respectively fixedly connected to the two threaded rods (24), and the chain (26) is engaged between the two sprockets (25).

4. The wastewater treatment device for the scrubbing tower waste liquid according to claim 1, characterized in that: The aeration assembly includes an air compressor body (29) disposed outside the sludge tank body (1), a second connecting pipe (210) fixedly connected to the sludge tank body (1), a second connecting pipe (210) fixedly connected between the second connecting pipe (210) and the air compressor body (29), and an aerator body (212) disposed on the second connecting pipe (210). The air is compressed by the air compressor body (29) and transported to the aerator body (212) through the third connecting pipe (211) and the second connecting pipe (210), and the gas is discharged by the operation of the aerator body (212).

5. The wastewater treatment device for the scrubbing tower waste liquid according to claim 1, characterized in that: The added components include a storage tank body (213) disposed outside the sludge tank body (1), a first extraction pump body (214) disposed on the storage tank body (213), a fourth connecting pipe (215) fixedly connected between the first extraction pump body (214) and the storage tank body (213), a fifth connecting pipe (216) fixedly connected between the first extraction pump body (214) and the sludge tank body (1), and a first one-way valve (217) disposed on the fifth connecting pipe (216). The first extraction pump body (214) extracts the polyalumina stored inside the storage tank body (213) and transports it to the inside of the sludge tank body (1) through the fourth connecting pipe (215) and the fifth connecting pipe (216).

6. The wastewater treatment device for the scrubbing tower waste liquid according to claim 1, characterized in that: The filter press assembly includes an outlet (31) fixedly connected to the sludge tank body (1), a filter press body (32) located outside the sludge tank body (1), a diaphragm pump body (33) fixedly connected between the filter press body (32) and the outlet (31), a first telescopic rod (34) located on the filter press body (32), a second push plate (35) fixedly connected to one end of the first telescopic rod (34), a filter plate body (36) located on the filter press body (32), and a collection frame (37) slidably connected to the filter press body (32). The diaphragm pump body (33) extracts sludge and transports it to the filter press body (32). The first telescopic rod (34) pushes the second push plate (35) to move, and the second push plate (35) moves to squeeze the filter plate body (36).

7. The wastewater treatment device for the scrubbing tower waste liquid according to claim 6, characterized in that: The filter press body (32) has a guide groove at the relative position of the second push plate (35), and the second push plate (35) is slidably connected to the groove.

8. The wastewater treatment device for the scrubbing tower waste liquid according to claim 6, characterized in that: The filter press body (32) has a storage groove at the relative position of the collection frame (37), and the collection frame (37) is slidably connected to the groove.

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