A wastewater treatment system for inorganic silica gel production

Abstract

The application discloses a kind of wastewater treatment systems for inorganic silica gel production, belong to silica gel wastewater treatment field, a kind of wastewater treatment systems for inorganic silica gel production, the operation mode of system includes the following steps: S1.remove the precipitate and other impurities in silica gel wastewater by centrifugal throwing off mode;S2.silica gel wastewater is neutralized by acid-base liquid;S3.silica gel wastewater is flocculated by flocculating agent;By centrifugal device, stirring and settling are carried out;And the upper silica gel wastewater is discharged into the filter tank through the drain pipe;S4.after the flocculation of flocculation sedimentation tank lower tank is accumulated, trigger mechanism in circuit system is compressed, to discharge flocculation into the pollution isolation tank and then into the filter tank;S5.silica gel filter water is secondary purified, disinfected and treated by more detailed filter screen, and finally discharged through the drain outlet.It can realize secondary filtration and cleaning of flocculation in silica gel wastewater, and greatly improve the efficiency of each link.

Description

Technical Field

[0001] This invention relates to the field of silicone wastewater treatment, and more specifically, to a wastewater treatment system for inorganic silicone production. Background Technology

[0002] The main raw materials for silicone production are water glass and sulfuric acid, and the main energy source is steam. First, a solution of sulfuric acid and sodium silicate of a certain concentration and temperature is prepared. After a synthesis reaction, a silicone gel solution is formed. The silicone gel undergoes an aging process to expand pores and stabilize the structure. Then, it is acid-soaked and washed with water to remove sodium sulfate, sulfuric acid and other impurities from the gel. Finally, the gel is retrieved and dried using steam heat exchange.

[0003] In existing processes, during the glue preparation process, the prolonged preparation time makes it easy for silica gel to precipitate in the receiver water, generating a large amount of neutral wastewater containing silica gel precipitate. During acid soaking, a sulfuric acid solution with a mass concentration of 3-4.5% is required, which, after replacement, generates 1-2% low-concentration sulfuric acid wastewater. During washing, a large amount of hot water is required, generating a large amount of 0.5-1% low-concentration sulfuric acid wastewater. At the glue discharge stage after glue scooping, a large amount of weakly acidic wastewater with low conductivity is generated. Traditional processes generally use lime neutralization followed by flocculation and sedimentation for these four types of wastewater, and finally filter the precipitate, with the filtrate meeting the standards for discharge.

[0004] For example, Chinese Patent No. CN202211234250.2 discloses a wastewater recycling device and treatment method for silicone production, published on December 9, 2020. It discloses a wastewater recycling and supply mechanism, which includes a base and a liquid storage impeller. The liquid storage impeller is positioned above the base, and its front and rear ends are rotatably connected to the base via impeller supports. A discharge chamber is located at the center of the liquid storage impeller, and an acid mixing chamber, a water mixing chamber, and a neutralization chamber are arranged around the discharge chamber. A partition is provided between the discharge chamber, acid mixing chamber, water mixing chamber, and neutralization chamber. Waterproof electrically controlled valves are installed between the acid mixing chamber, water mixing chamber, and neutralization chamber and the discharge chamber.

[0005] While the above solution addresses the aforementioned wastewater treatment problem, it is inefficient in treating silica gel wastewater. Furthermore, the sequential discharge of wastewater from each stage of the silica gel wastewater treatment process leads to low efficiency. Additionally, it fails to clean and perform secondary filtration of the formed flocs, thus failing to maximize their utilization. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of this invention is to provide a wastewater treatment system for inorganic silica gel production, which can achieve secondary filtration and cleaning of flocculants in silica gel wastewater and greatly improve the efficiency of each step.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A wastewater treatment system for inorganic silica gel production, the system operation includes the following steps:

[0009] S1. Pass the silica gel wastewater into the pretreatment tank and remove the precipitates and other impurities in the silica gel wastewater by centrifugation;

[0010] S2. The pretreated silica gel wastewater is passed into a pH adjustment tank, and the acidity or alkalinity of the silica gel wastewater is neutralized by the acid and alkaline solutions in the acid and alkaline storage tank.

[0011] S3. The neutralized silica gel wastewater is fed into the flocculation sedimentation tank, where the flocculant in the flocculant storage tank flocculates the suspended solids in the silica gel wastewater; the formed flocculants are stirred and settled by a centrifuge device so that the flocculants accumulate in the tank below the centrifuge device; the silica gel wastewater with suspended solids removed from the upper layer of the flocculation sedimentation tank is discharged into the water filter tank through the drain pipe.

[0012] S4. When the flocs in the lower tank of the flocculation sedimentation tank accumulate, the triggering mechanism in the circuit system is pressed to discharge the lower flocs into the sludge separation tank and collect and treat the flocs through the separation screen. The small amount of silica gel wastewater carried in the flocs for removing suspended solids will continue to be discharged into the water filter tank.

[0013] S5. The silica gel wastewater with suspended solids removed is passed through a filtration tank and then further purified through a finer filter screen. The disinfectant in the disinfection storage tank is then passed through the filtration tank to disinfect the treated silica gel wastewater. Finally, the wastewater is discharged through the drain outlet.

[0014] Furthermore, it is operated by the wastewater treatment system for inorganic silica gel production as described in claim 1; the flocculation sedimentation tank includes an electrical system and a lower tank plate;

[0015] The circuit system is used to control the opening and closing of the lower slot plate. The circuit system includes a power supply, a switch and the lower slot plate; the power supply, the switch and the lower slot plate are connected in series; the lower end of the lower slot plate is provided with a trigger mechanism as a circuit breaker point of the circuit system; one side of the trigger mechanism is connected to the switch wire and the other side is connected to the lower slot plate wire.

[0016] The lower trough plate is located at the center bottom of the flocculation sedimentation tank and is fixedly connected to the two side walls at the center bottom of the flocculation sedimentation tank. Multiple holes are opened on the bottom plate of the lower trough plate, and metal contacts are provided on both sides of the inner wall of the holes to serve as triggering mechanisms in the circuit system.

[0017] Furthermore, the lower trough plate includes a fixed plate, baffles, a spring contact rod, a telescopic plate, and a return spring; the fixed plate is located at the upper middle part of the lower trough plate, and is fixedly connected to both sides of the inner wall of the flocculation sedimentation tank. The middle part of the fixed plate is sleeved on the rotating rod, and the fixed plate and the rotating rod are slidably connected; the fixed plate has a cavity inside, and the opening end of the cavity faces both sides of the lower trough plate; the baffles are located on both sides of the fixed plate, and the end of the baffle near the rotating rod is embedded in the cavity of the fixed plate; the spring contact rod is located at the lower end of the fixed plate, and the upper end of the spring contact rod is fixedly connected to the fixed plate; the outer diameter of the spring contact rod matches the inner diameter of the hole in the lower bottom plate, so that the spring contact rod can enter the hole. The telescopic plate is located in the middle section of the inclined surface on both sides of the lower groove plate. The end of the telescopic plate away from the rotating rod abuts against the upper section of the inclined surface of the lower groove plate. The other end of the telescopic plate is embedded in the lower bottom plate of the lower groove plate and fixedly connected. The telescopic plate is a multi-segment telescopic structure with telescopic capability, and it is connected to the electrical wiring of the circuit system. The end of the baffle away from the rotating rod is fixedly connected to the end of the telescopic plate away from the rotating rod. The return spring is located in the cavity of the fixed plate. One end of the return spring is fixedly connected to the inner wall of the cavity of the fixed plate near the rotating rod, and the other end of the return spring is fixedly connected to the end of the baffle near the rotating rod. The spring contact rod is a metal rod.

[0018] Furthermore, it also includes a water filtration device; the water filtration device is located at the upper end of the flocculation sedimentation tank and is fixedly connected to the inner walls on both sides of the flocculation sedimentation tank; the water filtration device includes an outlet trough, which passes through the water filtration device and is inclined.

[0019] Furthermore, it also includes a first separation screen; the first separation screen is located at the lower end of the water filtration device, and the first separation screen is detachably connected to the inner walls on both sides of the flocculation sedimentation tank, and the mesh pores of the first separation screen are smaller than the flocs formed in the flocculation sedimentation tank.

[0020] Furthermore, it also includes a centrifuge device; the centrifuge device is located at the lower end of the flocculation sedimentation tank and is fixedly connected to the lower end wall of the flocculation sedimentation tank; the centrifuge device is triangular in shape and includes a rotating rod and a filter screen; the rotating rod is fixedly connected to the lower bottom plate of the lower trough plate and to the output end of the corresponding motor on the outside; the corresponding motor is electrically connected to the controller to control the rotation of the rotating rod; the filter screen is located on both sides of the upper end of the rotating rod and is detachably connected to the rotating rod; the pores of the filter screen are smaller than the size of the flocculants.

[0021] Furthermore, the pH adjustment tank includes an adjusting and stirring device, a pH sensor, an acid-base storage tank, and a flocculant storage tank. The adjusting and stirring device is located in the middle of the pH adjustment tank and is fixedly connected to the inner wall of the pH adjustment tank. The adjusting and stirring device is fixedly connected to the output end of a corresponding motor on the outside, and the corresponding motor is electrically connected to a controller to control the stirring of the adjusting and stirring device. The pH sensor is located in the middle of the side wall of the pH adjustment tank, and the pH adjustment tank is used to monitor the acidity and alkalinity in the pH adjustment tank. The acid-base storage tank is located on the outside of the pH adjustment tank and is interconnected with the pH adjustment tank. The lower end of the pH adjustment tank is provided with a drain outlet, and the pH adjustment tank is interconnected with the flocculation sedimentation tank through the drain outlet. The flocculant storage tank is located between the pH adjustment tank and the flocculation sedimentation tank, and the flocculant storage tank is interconnected with the flocculation sedimentation tank.

[0022] Furthermore, the pretreatment tank includes a pretreatment stirring device, a filter screen, and a waste liquid tank; the pretreatment stirring device is located at the upper end of the pretreatment tank and is fixedly connected to the inner wall of the pretreatment tank; the pretreatment stirring device is fixedly connected to the output end of a corresponding motor on the outside, and the corresponding motor is electrically connected to a controller to control the stirring of the pretreatment stirring device; the filter screen is arranged along the outer periphery of the pretreatment stirring device, and its lower end is a closed plate; the lower end of the pretreatment tank has an opening, and the pretreatment tank is connected to the pH adjustment tank through the opening; the waste liquid tank is located on the outside of the pretreatment tank and is connected to the pretreatment tank.

[0023] Furthermore, the sludge-proof tank is located at the lower end of the lower trough plate, and the inlet end of the sludge-proof tank is equipped with a second sludge-proof screen, which is detachably connected to the inner walls on both sides of the upper end of the sludge-proof tank; the lower end of the sludge-proof tank is also equipped with a water outlet, and the sludge-proof tank is connected to the water filter tank through the water outlet.

[0024] Furthermore, the drain pipe is located at the upper end of the flocculation sedimentation tank, and the inlet end of the drain pipe is located within the upper liquid surface of the flocculation sedimentation tank; a water pump is installed on the outer wall of the drain pipe; the filter tank includes a filter screen and a disinfection storage tank, and the installation height of the filter screen is lower than the outlet end of the drain pipe and the outlet end of the sludge trap; the filter screen is detachably connected to the inner walls on both sides of the filter tank; the disinfection storage tank is located at the upper end of the filter tank, and the disinfection storage tank is interconnected with the filter tank, with the drain outlet located on one side of the lower end of the filter tank.

[0025] Compared with the prior art, the advantages of this invention are:

[0026] I. This solution significantly improves the efficiency and complexity of the complex processing procedures in the comparison document through five steps. It changes the roller-type processing method of the comparison document to a treatment pool method, reducing the possibility of dangerous leakage that may occur with the roller-type method and greatly improving safety.

[0027] Second, the flocculants are collected a second time through an electrical system, and the simple structure makes it more convenient than the traditional method of manual control, thus reducing labor costs.

[0028] III. The structural design of the lower slot plate allows the telescopic plate to be driven in conjunction with the baffle, resulting in a more scientific and reasonable opening design for the lower slot plate. The cooperation between the spring contact rod and the hole also ensures stable triggering of the circuit system, increasing the stability of the device's operation.

[0029] Fourth, the inclined setting of the water filtration device makes the water flow path of the original straight channel longer, which can make the fall path of the flocculent after it is raised longer, ensuring that the liquid in the upper layer of the flocculation sedimentation tank does not contain flocculent.

[0030] Fifth, the first separation screen can completely block the raised flocs, so that there are no flocs in the upper layer of liquid in the flocculation sedimentation tank, and the first separation screen does not block the flow of non-flocculated liquid.

[0031] VI. The centrifuge device is designed to be wider at the bottom and narrower at the top, so as to completely lift the bottom flocs and drop them into the lower trough. The filter screen is also removable and replaceable, which can also prevent the flocs from rotating and settling in the centrifugal direction.

[0032] 7. The pH adjustment tank allows for a more complete reaction between the silica gel wastewater and the flocculant, and the pH sensor can monitor the acidity and alkalinity, facilitating subsequent silica gel wastewater treatment.

[0033] 8. The pretreatment tank can remove sediment and other impurities from silica gel wastewater.

[0034] 9. The installation of the sludge trap allows for a second drainage of the flocculent material, and the second sludge screen can isolate the flocculent material and replace and clean it, facilitating the cleaning and continuous operation of the device.

[0035] 10. The drainage pipe allows the silica gel wastewater treated in the upper layer of the flocculation sedimentation tank to be discharged into the filtration tank for final treatment. The filtration tank performs final filtration and purification of the silica gel wastewater to ensure it meets discharge standards. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the planar structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the pretreatment tank structure of the present invention;

[0038] Figure 3 This is a schematic diagram of the pH adjustment tank structure of the present invention;

[0039] Figure 4 This is a schematic diagram of the flocculation sedimentation tank structure of the present invention;

[0040] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A;

[0041] Figure 6 This is a schematic diagram of the water filtration device of the present invention;

[0042] Figure 7 This is a schematic diagram of the lower groove plate of the present invention;

[0043] Figure 8 This is a schematic diagram of the cross-sectional structure of the lower groove plate of the present invention.

[0044] Explanation of the labels in the diagram:

[0045] Pretreatment tank 1, pretreatment stirring device 11, filter screen 12, waste liquid tank 13, pH adjustment tank 2, adjustment stirring device 21, pH sensor 22, acid and alkali storage tank 23, flocculant storage tank 24, flocculation sedimentation tank 3, water filtration device 31, water outlet tank 311, first separation screen 32, centrifuge device 33, rotating rod 331, filter screen 332, circuit system 34, lower tank plate 35, fixing plate 351, baffle 352, spring contact rod 353, telescopic plate 354, reset spring 355, dirt separation tank 4, second separation screen 41, water pumping pipe 5, water pump 51, water filtration tank 6, filter plate 61, disinfection storage tank 62, drain outlet 7. Detailed Implementation

[0046] Example 1:

[0047] Please see Figure 1 An inorganic silicone wastewater treatment system includes S1: First, the silicone wastewater in the waste liquid tank 13 is discharged into the pretreatment tank 1 for the first step of centrifugal stirring and filtration to remove precipitates and other impurities from the silicone wastewater.

[0048] S2: After being filtered in step 1, the silica gel wastewater is discharged into pH adjustment tank 2. The silica gel wastewater is neutralized by the acid and alkali solution in acid and alkali storage tank 23, and the pH sensor is used to monitor and ensure that the acid and alkali index is neutral.

[0049] S3: The neutralized silica gel wastewater is discharged into the flocculation sedimentation tank 3. After the silica gel wastewater enters the flocculation sedimentation tank 3, flocculant is introduced into the flocculation sedimentation tank 3 from the flocculant storage tank 24 to flocculate and precipitate the suspended solids in the silica gel wastewater. During the flocculation sedimentation process, the centrifuge device 33 stirs the flocculants, causing them to settle and accumulate in the lower tank of the centrifuge device 33. The silica gel wastewater above, after the suspended solids have been removed, flows upward through the filter screen and the water filtration device, and is discharged into the water filtration tank 6 through the water pumping pipe 5.

[0050] S4: Following S3, the amount of flocculent material in the lower tank of the centrifuge increases, which compresses the trigger mechanism in the circuit system 34 to open the circuit system, allowing the lower tank plate to fall into the sludge tank 4. The flocculent material is then isolated by the second sludge screen 41, and the silica gel wastewater passes through the sludge tank 4 into the water filter tank 6.

[0051] S5: Following S4, the treated silica gel wastewater is discharged into the filtration tank 6 and undergoes final filtration through the filter plate 61 in the middle of the filtration tank 6. At the same time, disinfectant water is introduced into the disinfection storage tank 62 above the filtration tank 6 to perform final disinfection treatment on the silica gel wastewater, which is finally discharged from the drain outlet 7.

[0052] Working principle:

[0053] In this invention, the silica gel wastewater first undergoes a pretreatment filtration process in a pretreatment tank, followed by pH neutralization in a pH adjustment tank. The neutralized wastewater is then discharged into a flocculation sedimentation tank, where flocculant is added from a flocculant reserve tank to react with the wastewater and generate flocs. These flocs are then centrifuged and separated from the treated wastewater. The upper portion of the wastewater in the sedimentation tank is filtered through a first screen to remove the flocs, ensuring complete separation. The upper water is then pumped into a filtration tank. When the flocs at the bottom of the sedimentation tank reach a certain weight, they press a spring-loaded rod, forcing the lower plate to open and allowing the flocs to be discharged. These discharged flocs are then intercepted by a second screen, thus cleaning the flocs and separating the treated wastewater. The separated wastewater is then discharged into the filtration tank for further filtration. Finally, add disinfectant to the water filter tank, and it can be discharged from the drain outlet.

[0054] Example 2:

[0055] Please see Figure 1-8 A wastewater treatment system for inorganic silica gel production includes a pretreatment tank 1, a pH adjustment tank 2, a flocculation sedimentation tank 3, a sludge separation tank 4, a pumping pipe 5, a filter tank 6, and a drain outlet 7.

[0056] The pretreatment tank 1 includes a pretreatment stirring device 11, a filter screen 12, and a waste liquid tank 13. The pretreatment stirring device 11 is located at the upper end of the pretreatment tank 1 and is fixedly connected to the inner wall of the pretreatment tank 1. The pretreatment stirring device 11 is fixedly connected to the output end of a corresponding motor on the outside, and the corresponding motor is electrically connected to a controller to control the stirring of the pretreatment stirring device 11. The filter screen 12 is arranged along the outer periphery of the pretreatment stirring device 11, and its lower end is a closed plate, allowing the waste liquid stirred by the pretreatment stirring device 11 to be thrown out in the circumferential direction of the filter screen 12. The lower end of the pretreatment tank 1 has an opening, through which the pretreatment tank 1 communicates with the pH adjustment tank 2. The waste liquid tank 13 is located outside the pretreatment tank 1 and is interconnected with the pretreatment tank 1. The pretreatment tank 1 is used to treat precipitates and other impurities in the silica gel wastewater.

[0057] pH adjustment tank 2 includes an adjusting and stirring device 21, a pH sensor 22, an acid-base storage tank 23, and a flocculant storage tank 24. The adjusting and stirring device 21 is located in the middle of pH adjustment tank 2 and is fixedly connected to the inner wall of pH adjustment tank 2. The adjusting and stirring device 21 is fixedly connected to the output end of a corresponding motor on the outside, and the corresponding motor is electrically connected to a controller to control the stirring of the adjusting and stirring device 21. The pH sensor 22 is located in the middle of the side wall of pH adjustment tank 2 and is used to monitor the pH level in pH adjustment tank 2 to control the supply of acid and base solutions from acid-base storage tank 23 to pH adjustment tank 2. Acid-base storage tank 23 is located on the outside of pH adjustment tank 2 and is interconnected with pH adjustment tank 2. A drain outlet is provided at the lower end of pH adjustment tank 2, and pH adjustment tank 2 is interconnected with flocculation sedimentation tank 3 through the drain outlet. Flocculant storage tank 24 is located between pH adjustment tank 2 and flocculation sedimentation tank 3, and is interconnected with flocculation sedimentation tank 3. pH adjustment tank 2 is used to adjust the pH of silica gel wastewater to neutral, which facilitates the subsequent coagulation of suspended solids and flocculants.

[0058] The flocculation sedimentation tank 3 includes a water filtration device 31, a first separation screen 32, a centrifuge device 33, an electrical system 34, and a lower trough plate 35. The bottom surface of the flocculation sedimentation tank 3 gradually decreases in horizontal height from both sides of the bottom to the center, forming a concave inclined surface in the middle to facilitate the sedimentation of flocculants to the center of the flocculation sedimentation tank 3.

[0059] The water filtration device 31 is located at the upper end of the flocculation sedimentation tank 3, and is fixedly connected to the inner walls on both sides of the flocculation sedimentation tank 3. The water filtration device 31 includes an outlet trough 311, which runs through the water filtration device 31 and is inclined to maximize the water outlet path.

[0060] The first separation mesh 32 is located at the lower end of the water filtration device 31. The first separation mesh 32 is detachably connected to the inner walls on both sides of the flocculation sedimentation tank 3. The mesh pores of the first separation mesh 32 are much smaller than the flocs formed in the flocculation sedimentation tank.

[0061] Centrifuge device 33 is located at the lower end of flocculation sedimentation tank 3 and is fixedly connected to the lower end wall of flocculation sedimentation tank 3. Centrifuge device 33 is triangular in shape and includes a rotating rod 331 and a filter screen 332. The rotating rod 331 is fixedly connected to the lower bottom plate of the lower trough plate 35 and to the output end of the corresponding motor on the outside. The corresponding motor is electrically connected to the controller to control the rotation of the rotating rod 331. The filter screen 332 is located on both sides of the upper end of the rotating rod 331 and is detachably connected to the rotating rod 331 to serve as the working component of centrifuge device 33. The pore size of the filter screen 332 is much smaller than the size of the flocculants so that the flocculants can adhere to the filter screen 332 during centrifugation.

[0062] The circuit system 34 is used to control the opening and closing of the lower slot plate 35. The circuit system 34 includes a power supply, a switch, and the lower slot plate 35. The power supply, switch, and lower slot plate 35 are connected in series. A trigger mechanism is provided at the lower end of the lower slot plate 35 to serve as a break point in the circuit system 34. One side of the trigger mechanism is connected to the switch wire, and the other side is connected to the lower slot plate 35 wire, so that the lower slot plate 35 can be driven to operate after the circuit system 34 is closed.

[0063] The lower trough plate 35 is located at the bottom center of the flocculation sedimentation tank 3, and is fixedly connected to the two side walls at the bottom center of the flocculation sedimentation tank 3. Multiple holes are provided on the bottom plate of the lower trough plate 35, and metal contacts are provided on both sides of the inner wall of each hole to serve as triggering mechanisms in the circuit system 34. The lower trough plate 35 includes a fixed plate 351, a baffle 352, a spring contact rod 353, a telescopic plate 354, and a return spring 355. The fixed plate 351 is located at the upper center of the lower trough plate 35, and is fixedly connected to both sides of the inner wall of the flocculation sedimentation tank 3. The middle part of the fixed plate 351 is sleeved on the rotating rod 331, and the fixed plate 351 and the rotating rod 331 are slidably connected. The fixed plate 351 has a cavity, and the opening end of the cavity faces both sides of the lower trough plate 35. The baffles 352 are located on both sides of the fixed plate 351, and the end of the baffle 352 near the rotating rod 331 is embedded in the cavity of the fixed plate 351. The spring contact rod 353 is located at the lower end of the fixed plate 351, and its upper end is fixedly connected to the fixed plate 351. The outer diameter of the spring contact rod 353 matches the inner diameter of the hole in the lower base plate, allowing the spring contact rod 353 to enter the hole. The telescopic plate 354 is located in the middle section of the inclined surfaces on both sides of the lower groove plate 35. The end of the telescopic plate 351 away from the rotating rod 331 abuts against the upper section of the groove wall of the inclined surface of the lower groove plate 35; the other end of the telescopic plate 351 is embedded in the lower base plate of the lower groove plate 35 and fixedly connected. The telescopic plate 351 is a multi-segment telescopic structure with telescopic capability, and it is connected to the electrical system wires. The end of the baffle 352 away from the rotating rod 331 is fixedly connected to the end of the telescopic plate 354 away from the rotating rod 331, so that when the telescopic plate 354 telescopically extends or retracts, it can drive the baffle 352 to work together to open and close the lower groove plate 35. The return spring 355 is located inside the cavity of the fixed plate 351. One end of the return spring 355 is fixedly connected to the inner wall of the cavity of the fixed plate 351 near the rotating rod 331, and the other end of the return spring 355 is fixedly connected to one end of the baffle 352 near the rotating rod 331, so as to provide a guiding force when the telescopic plate 354 extends or retracts. The spring contact rod 353 is a metal rod. When the spring contact rod 353 is pressed into the triggering mechanism, it will conduct the circuit through its own material, so that the circuit system 34 becomes a circuit and drives the telescopic plate 351 to work.

[0064] The sludge-separating tank 4 is located at the lower end of the lower trough plate 35, and the inlet end of the sludge-separating tank 4 is provided with a second debris-separating screen 41, which is detachably connected to the inner walls on both sides of the upper end of the sludge-separating tank 4. The lower end of the sludge-separating tank 4 is also provided with a water outlet, and the sludge-separating tank 4 is interconnected with the water filter tank 6 through the water outlet.

[0065] The drain pipe 5 is located at the upper end of the flocculation sedimentation tank 3, and the inlet end of the drain pipe 5 is located within the upper liquid surface of the flocculation sedimentation tank 3. A water pump 51 is provided on the outer wall of the drain pipe 5 to pump the silica gel wastewater treated at the upper end of the flocculation sedimentation tank 3 into the water filter tank 6 through the working drain pipe 5.

[0066] The water filtration tank 6 includes a filter screen 61 and a disinfection storage tank 62. The installation height of the filter screen 61 is lower than the outlet height of the drain pipe 5 and the outlet height of the sludge trap 4, so that the discharged treated silica gel wastewater is filtered through the filter screen 61. The filter screen 61 is detachably connected to the inner walls on both sides of the water filtration tank 6 for easy replacement. The disinfection storage tank 62 is located at the upper end of the water filtration tank 6 and is interconnected with the water filtration tank 6.

[0067] The drain outlet 7 is located on one side of the lower end of the filter tank 6 to discharge the treated silica gel wastewater.

[0068] Working principle:

[0069] This embodiment primarily changes the process within the flocculation sedimentation tank from unidirectional filtration to secondary filtration and provides a replaceable cleaning screen for the flocculants. First, flocculant is introduced into the flocculation sedimentation tank through a flocculant storage tank to cause the silica gel wastewater to flocculate and settle. Then, a centrifugal device centrifuges the formed flocculants, causing them to accumulate at the lower trough plate. When the lower trough plate is compressed by the flocculants, a spring contact rod enters a hole, triggering a metal contact to open the electrical system. Once the electrical system is open, a telescopic plate is opened, allowing the flocculants on the lower trough plate to fall through the opening into a sludge trap for collection and treatment.

Claims

1. A wastewater treatment system for inorganic silica gel production, characterized in that: The system operates by following these steps: S1. Pass the silica gel wastewater into the pretreatment tank and remove the precipitates and other impurities in the silica gel wastewater by centrifugation; S2. The pretreated silica gel wastewater is passed into a pH adjustment tank, and the acidity or alkalinity of the silica gel wastewater is neutralized by the acid and alkaline solutions in the acid and alkaline storage tank. S3. The neutralized silica gel wastewater is fed into the flocculation sedimentation tank, where the flocculant in the flocculant storage tank flocculates the suspended solids in the silica gel wastewater; the formed flocculants are stirred and settled by a centrifuge device so that the flocculants accumulate in the tank below the centrifuge device; the silica gel wastewater with suspended solids removed from the upper layer of the flocculation sedimentation tank is discharged into the water filter tank through the drain pipe. S4. When the flocs in the lower tank of the flocculation sedimentation tank accumulate, the triggering mechanism in the circuit system is pressed to discharge the lower flocs into the sludge separation tank and collect and treat the flocs through the separation screen. The small amount of silica gel wastewater carried in the flocs for removing suspended solids will continue to be discharged into the water filter tank. S5. The silica gel wastewater with suspended solids removed is passed through a filter tank and then purified a second time through a finer filter screen. The disinfectant in the disinfection storage tank is then passed through the filter tank to disinfect the treated silica gel wastewater. Finally, it is discharged through the drain outlet. The flocculation sedimentation tank includes an electrical system and a lower tank plate; The circuit system is used to control the opening and closing of the lower slot plate. The circuit system includes a power supply, a switch and the lower slot plate; the power supply, the switch and the lower slot plate are connected in series; the lower end of the lower slot plate is provided with a trigger mechanism as a circuit breaker point of the circuit system; one side of the trigger mechanism is connected to the switch wire and the other side is connected to the lower slot plate wire. The lower trough plate is located at the bottom center of the flocculation sedimentation tank and is fixedly connected to the two side walls at the bottom center of the flocculation sedimentation tank. Multiple holes are provided on the bottom plate of the lower trough plate, and metal contacts are provided on both sides of the inner wall of the holes to serve as triggering mechanisms in the circuit system. The lower trough plate includes a fixed plate, baffles, a spring contact rod, a telescopic plate, and a return spring. The fixed plate is located at the upper middle part of the lower trough plate and is fixedly connected to both sides of the inner wall of the flocculation sedimentation tank. The middle part of the fixed plate is sleeved on the rotating rod, and the fixed plate and the rotating rod are slidably connected. The fixed plate has a cavity inside, and the opening end of the cavity faces both sides of the lower trough plate. The baffles are located on both sides of the fixed plate, and the end of the baffle near the rotating rod is embedded in the cavity of the fixed plate. The spring contact rod is located at the lower end of the fixed plate, and the upper end of the spring contact rod is fixedly connected to the fixed plate. The outer diameter of the spring contact rod matches the inner diameter of the hole in the lower bottom plate so that the spring contact rod can enter the hole. The telescopic plate is located in the middle section of the inclined surface on both sides of the lower groove plate. The end of the telescopic plate away from the rotating rod abuts against the upper section of the groove wall of the inclined surface of the lower groove plate. The other end of the telescopic plate is embedded in the lower bottom plate of the lower groove plate and fixedly connected. The telescopic plate is a multi-segment telescopic structure with telescopic capability, and the telescopic plate is connected to the electrical system wires. The end of the baffle away from the rotating rod is fixedly connected to the end of the telescopic plate away from the rotating rod. The return spring is located in the cavity of the fixed plate. One end of the return spring is fixedly connected to the inner wall of the cavity of the fixed plate near the rotating rod, and the other end of the return spring is fixedly connected to the end of the baffle near the rotating rod. The spring contact rod is a metal rod. It also includes a centrifuge device; the centrifuge device is located at the lower end of the flocculation sedimentation tank and is fixedly connected to the lower end wall of the flocculation sedimentation tank; the centrifuge device is triangular in shape and includes a rotating rod and a filter screen; the rotating rod is fixedly connected to the lower bottom plate of the lower trough plate and to the output end of the corresponding motor on the outside; the corresponding motor is electrically connected to the controller to control the rotation of the rotating rod; the filter screen is located on both sides of the upper end of the rotating rod and is detachably connected to the rotating rod; the pores of the filter screen are smaller than the size of the flocculants.

2. The wastewater treatment system for inorganic silica gel production according to claim 1, characterized in that: It also includes a water filtration device; the water filtration device is located at the upper end of the flocculation sedimentation tank and is fixedly connected to the inner walls on both sides of the flocculation sedimentation tank; the water filtration device includes an outlet trough, which runs through the water filtration device and is inclined.

3. The wastewater treatment system for inorganic silica gel production according to claim 1, characterized in that: It also includes a first separation screen; the first separation screen is located at the lower end of the water filtration device, and the first separation screen is detachably connected to the inner walls on both sides of the flocculation sedimentation tank. The mesh pores of the first separation screen are smaller than the flocs formed in the flocculation sedimentation tank.

4. The wastewater treatment system for inorganic silica gel production according to claim 1, characterized in that: The pH adjustment tank includes an adjustment and stirring device, a pH sensor, an acid and alkali storage tank, and a flocculant storage tank; The regulating and stirring device is located in the middle of the pH adjustment tank and is fixedly connected to the inner wall of the pH adjustment tank. The regulating and stirring device is fixedly connected to the output end of the corresponding motor on the outside, and the corresponding motor is electrically connected to the controller to control the stirring of the regulating and stirring device. The pH sensor is located in the middle of the side wall of the pH adjustment tank, and the pH adjustment tank is used to monitor the acidity and alkalinity in the pH adjustment tank. The acid and alkali storage tank is located on the outside of the pH adjustment tank and is connected to the pH adjustment tank. The pH adjustment tank has a drain outlet at the lower end, and the pH adjustment tank is connected to the flocculation and sedimentation tank through the drain outlet. The flocculant storage tank is located between the pH adjustment tank and the flocculation and sedimentation tank, and the flocculant storage tank is connected to the flocculation and sedimentation tank.

5. The wastewater treatment system for inorganic silica gel production according to claim 1, characterized in that: The pretreatment tank includes a pretreatment stirring device, a filter screen, and a waste liquid tank; The pretreatment stirring device is located at the upper end of the pretreatment tank and is fixedly connected to the inner wall of the pretreatment tank. The pretreatment stirring device is fixedly connected to the output end of the corresponding motor on the outside, and the corresponding motor is electrically connected to the controller to control the stirring of the pretreatment stirring device. The filter screen is set along the outer periphery of the pretreatment stirring device, and the lower end is a closed plate. The lower end of the pretreatment tank has an opening, and the pretreatment tank is connected to the pH adjustment tank through the opening. The waste liquid tank is located outside the pretreatment tank and is connected to the pretreatment tank.

6. The wastewater treatment system for inorganic silica gel production according to claim 1, characterized in that: The sludge separator is located at the lower end of the lower trough plate, and the inlet end of the sludge separator is equipped with a second sludge screen, which is detachably connected to the inner walls on both sides of the upper end of the sludge separator; the lower end of the sludge separator is also equipped with a water outlet, and the sludge separator is connected to the water filter tank through the water outlet.

7. The wastewater treatment system for inorganic silica gel production according to claim 1, characterized in that: The drain pipe is located at the upper end of the flocculation sedimentation tank, and the inlet end of the drain pipe is located within the upper liquid surface of the flocculation sedimentation tank; a water pump is installed on the outer wall of the drain pipe; the filter tank includes a filter screen and a disinfection storage tank, and the installation height of the filter screen is lower than the outlet end of the drain pipe and the outlet end of the sludge trap; the filter screen is detachably connected to the inner walls on both sides of the filter tank; the disinfection storage tank is located at the upper end of the filter tank, and the disinfection storage tank is interconnected with the filter tank, with the drain outlet located on one side of the lower end of the filter tank.

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