Sewage treatment device in chemical production process

Abstract

The utility model relates to a sewage treatment device in a chemical production process, which comprises a reaction box, a settling box and a filter box, a pretreatment component is arranged above the reaction box, a filter screen and a settling treatment component are arranged in the settling box, and an activated carbon layer is arranged at the bottom of the filter box; the pretreatment assembly comprises a fixing frame, a conveying belt is installed on the fixing frame and comprises two rotating rollers and a belt, a net strip is arranged on the belt, a water inlet barrel is installed at the upper end of the fixing frame, and a guide plate is arranged on the bottom face of one end of the fixing frame; a stirring rod is mounted in the reaction box, a driving motor is in butt joint with the stirring rod, and a first chain is connected between an output shaft of the driving motor and a rotating roller of the conveying belt; a cleaning plate and a cleaning brush are mounted at the upper end of the sliding plate; a scraping plate is arranged below the sliding plate; a reciprocating rod is arranged in the middle of the sliding plate in a penetrating manner; a driven gear is mounted at the top end of the reciprocating rod;

Description

Technical Field

[0001] This utility model relates to the field of chemical wastewater treatment technology, specifically to a device for wastewater treatment in chemical production processes. Background Technology

[0002] Chemical production processes generate large amounts of wastewater containing various pollutants. Chemical wastewater typically contains pollutants such as precipitates, heavy metal ions, and acidic and alkaline substances. Its composition is complex and its pollution level is high. If it is discharged directly without effective treatment, it will cause serious damage to the natural environment, including soil and water bodies.

[0003] The precipitates in chemical wastewater vary in nature and can be divided into water-soluble precipitates and solid precipitates. For solid precipitates, screening methods are required to separate them; while for water-soluble precipitates, flocculants need to be added to the wastewater. The flocculants promote the aggregation and coagulation of fine suspended particles and colloidal substances in the wastewater into larger flocs, thereby achieving sedimentation and separation.

[0004] Existing treatment facilities lack the ability to handle these sediments, which typically accumulate at the bottom of the unit. Over time, this accumulation increases, taking up significant processing space and hindering the unit's normal operation. Furthermore, traditional sediment cleaning methods often require regular manual cleaning, increasing labor costs. Utility Model Content

[0005] The purpose of this invention is to provide a wastewater treatment device for chemical production processes. This device can separate fixed sediments from chemical wastewater. Simultaneously, a solid flocculant can be added to the reaction tank and stirred. The sediment at the bottom of the sedimentation tank can also be scraped off.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a wastewater treatment device in a chemical production process, comprising a reaction tank, a sedimentation tank and a filter tank, wherein a pretreatment component is provided above the reaction tank, a filter screen and a sedimentation treatment component are provided inside the sedimentation tank, and an activated carbon layer is provided at the bottom of the filter tank.

[0007] The pretreatment component includes a fixed frame, on which a conveyor belt is installed. The conveyor belt includes two rotating rollers and a belt. Several mesh strips are provided on the surface of the belt. Several mesh holes are provided on both the surface of the belt and the mesh strips. A water inlet is installed at the upper end of the fixed frame. A rectangular opening is provided on the bottom surface of the upper end of the fixed frame. A guide plate is provided below the rectangular opening.

[0008] A stirring rod is installed inside the reaction chamber, and a drive motor is connected to the stirring rod. A first chain connects the output shaft of the drive motor to the rotating roller of the conveyor belt.

[0009] The sedimentation treatment component includes a chute, a slide plate mounted on the chute, a cleaning plate and a cleaning brush mounted on the upper end of the slide plate, a scraper located below the slide plate, a reciprocating rod running through the middle of the slide plate, a driven gear mounted on the top of the reciprocating rod, and a main gear mounted on the output shaft of the drive motor, with the main gear meshing with the driven gear.

[0010] Furthermore, a dispensing assembly is provided above the reaction chamber. The dispensing assembly includes a dispensing box, in which a spiral rod is installed through. A discharge port is provided on one side of the dispensing box, and an L-shaped discharge pipe is connected to the discharge port. A switch valve is provided on the discharge pipe, and the discharge pipe is located at the upper end of the reaction chamber.

[0011] Furthermore, a second chain is installed between the top of the screw rod and the roller of the conveyor belt, and a gear shaft is rotatably installed between the inner wall of the feeding box. A gear disk is installed on the gear shaft, the screw rod meshes with the gear disk, and several actuating rods are provided on the surface of the gear disk.

[0012] Furthermore, a rectangular opening is provided on the upper end of the inner wall between the reaction tank and the sedimentation tank, and a filter basket is installed below the opening. The same rectangular opening is provided on the upper end of the inner wall between the sedimentation tank and the filter tank, and an outlet is provided on one side of the filter tank.

[0013] Furthermore, one end of the reciprocating rod passes through the inner wall between the reaction tank and the sedimentation tank, and also passes through the side wall of the reaction tank. The reciprocating rod is located below the stirring rod and the stirring blade. The threads on the reciprocating rod are only distributed in the section inside the sedimentation tank, and there is no threaded structure in the internal area of ​​the reaction tank.

[0014] Furthermore, L-shaped drain troughs are provided on both sides of the bottom of the sedimentation tank, and the drain troughs are in close contact with the bottom corners of the sedimentation tank. The drain troughs are pull-out structures.

[0015] Furthermore, one end of the fixed frame is horizontal and the other end is inclined upward. The conveyor belt is installed along the direction, one end of which is horizontal and the other end is inclined upward. The guide plate is located at the upper end of the fixed frame. A collection trough is fixedly installed on one side of the reaction box and is located below the guide plate.

[0016] Furthermore, the water inlet cylinder is vertically installed on the horizontal side of the fixing frame, and the outer shell is fixedly installed on the outside of the fixing frame. The bottom of the outer shell is provided with a circular opening, which is located above the reaction chamber.

[0017] Compared with existing technologies, the beneficial effects of this invention are as follows: Wastewater is fed into the pretreatment component through an opening in the inlet cylinder and screened via a mesh in the conveyor belt. Solid sediment is then transported to a collection tank, while wastewater flows into the reaction tank. Solid flocculant is added to the reaction tank via a dispensing component above it, and the reaction is agitated by stirring blades. After the reaction, the wastewater flows to a sedimentation tank for settling. The sediment settles to the bottom of the sedimentation tank under gravity. A sliding plate drives a cleaning brush and scraper to move back and forth simultaneously, scraping the flocculent material on the filter screen and the sediment at the bottom of the sedimentation tank towards a discharge trough, from which it is discharged. The clear water that has settled in the sedimentation tank flows into the filter tank through an opening and is filtered by the activated carbon layer before finally being discharged from the filter tank.

[0018] During this process, the drive motor can rotate the stirring rod and drive the conveyor belt through the first chain. At the same time, the second chain between the conveyor belt and the dispensing component can drive the spiral rod in the dispensing component to dispense solid flocculant. Meanwhile, the gear meshing relationship can drive the slide plate to move back and forth at the bottom of the sedimentation tank.

[0019] This invention can separate fixed sediments from chemical wastewater. Simultaneously, solid flocculants can be added to the reaction tank and stirred. The sediment at the bottom of the sedimentation tank can also be scraped off, improving wastewater treatment efficiency and sedimentation separation effect, reducing the frequency of manual cleaning and maintenance costs, and ensuring wastewater treatment quality. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is an isometric schematic diagram of the overall structure of this utility model;

[0022] Figure 3 This is a schematic diagram showing the connection relationship between the pretreatment component, the sedimentation treatment component, the dispensing component, and the stirring rod of this utility model;

[0023] Figure 4 This is a schematic diagram showing the connection relationship between the sedimentation treatment component, the dispensing component, and the stirring rod of this utility model;

[0024] Figure 5 This is a schematic cross-sectional view of the processing box structure of this utility model;

[0025] Figure 6 This is a schematic diagram of the internal structure of the pretreatment component of this utility model;

[0026] Figure 7 This is a schematic diagram of the dispensing component of this utility model;

[0027] Figure 8This is a schematic diagram of the sewage trough structure of this utility model;

[0028] Among them, 11-reaction box, 12-sedimentation box, 13-filter box, 21-drive motor, 22-stirring rod, 23-stirring blade, 24-filter basket, 25-filter screen, 26-activated carbon layer, 27-outlet, 28-sewage trough, 31-fixed frame, 32-rotating roller, 33-belt, 34-net strip, 35-inlet cylinder, 36-guide plate, 37-collection trough, 38-outer shell, 39-first chain, 41-feeding box, 42-spiral rod, 43-discharge pipe, 44-second chain, 45-gear shaft, 46-gear disc, 47-actuator, 51-slide groove, 52-slide plate, 53-cleaning plate, 54-cleaning brush, 55-scraper, 56-reciprocating rod, 57-main gear, 58-driven gear. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It should be understood that the preferred embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. In the embodiments, the components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to an electrical connection; they can refer to a hydraulic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] See Figure 1-5As shown, a wastewater treatment device for a chemical production process includes a wastewater treatment tank. The wastewater treatment tank has a rectangular overall structure and is a semi-enclosed box used to treat chemical wastewater. The wastewater treatment tank includes a reaction tank 11, a sedimentation tank 12, and a filter tank 13, which are arranged in a close sequence. A flocculant is added to the reaction tank 11 to react chemically with pollutants in the wastewater. The flocculant causes fine suspended particles and colloidal substances in the wastewater to aggregate into larger flocs, facilitating subsequent sedimentation and separation. After treatment in the reaction tank 11, the reacted wastewater flows from the top of the reaction tank 11 into the sedimentation tank 12. The flocs and other insoluble solids in the wastewater settle to the bottom of the sedimentation tank 12, achieving solid-liquid separation. The clarified water overflows from the top of the sedimentation tank 12 and enters the filter tank 13, while the settled sludge is treated through sludge removal procedures. Wastewater treated in the sedimentation tank may still contain some fine suspended particles and colloidal substances. The filter box 13 further filters the wastewater through the filter medium to remove these residual impurities and improve the clarity and quality of the effluent.

[0032] See Figure 6 As shown, a pretreatment component is installed at the upper end of the reaction tank 11. The pretreatment component can separate and remove solid sediments from wastewater. The pretreatment component includes a fixed frame 31, one end of which is horizontal and the other end is inclined upward. A conveyor belt is installed on the fixed frame 31, with one end horizontal and the other end inclined upward. The conveyor belt includes rotating rollers 32 rotatably installed at both ends of the fixed frame 31, and a belt 33 is connected between the rotating rollers 32. Guide wheels are provided at the corners of the conveyor belt and are fixedly installed on the fixed frame 31. Several strip-shaped mesh strips 34 are evenly spaced on the surface of the belt 33, and several mesh holes are provided on both the surface of the belt 33 and the mesh strips 34.

[0033] An inlet cylinder 35 is fixedly installed at the upper horizontal position of the fixed frame 31. The inlet cylinder 35 is vertically installed on the fixed frame 31, with both its top and bottom open. Wastewater is poured in from the top of the inlet cylinder 35 and screened and separated through the mesh on the surface of the belt 33, while solid sediment is conveyed upward through the mesh strips 34 on the belt 33. A rectangular opening is provided on the bottom surface of the upper end of the fixed frame 31, and a guide plate 36 is provided below the rectangular opening, perpendicular to the bottom surface of the fixed frame 31. A collection tank 37 is provided on one side of the reaction tank 11, located below the guide plate 36. As the belt 33 moves to the highest point of the fixed frame 31, the solid sediment will fall from the rectangular opening at the top of the fixed frame 31 and slide down the inclined guide plate 36 into the collection tank below. A shell 38 is fixedly installed on the outside of the fixed frame 31, and a circular opening is provided at the bottom of the shell 38, located above the reaction tank 11. Wastewater flows in through the opening in the inlet cylinder 35, and after being screened by the mesh of the belt belt 33, it can flow into the reaction tank 11 through the round opening of the outer shell 38.

[0034] See Figure 3-5 As shown, a stirring rod 22 is horizontally installed in the reaction tank 11. Several stirring blades 23 are mounted on the stirring rod 22, with one end extending out of the side wall of the reaction tank 11. A drive motor 21 is connected to the top of the stirring rod 22. The stirring blades 23 can improve the uniformity of mixing the flocculant and wastewater. A first chain 39 is connected between the output shaft of the drive motor 21 and the roller 32 at the lower end of the conveyor belt. When the drive motor 21 drives the stirring rod 22 to rotate, it can also drive the conveyor belt.

[0035] See Figure 7 As shown, to automatically add solid flocculant into the reaction chamber 11, a dispensing assembly is installed at the upper end of the reaction chamber 11. The dispensing assembly is located on one side of the pretreatment assembly. The dispensing assembly includes a dispensing box 41, which is funnel-shaped with a discharge port at the top and a cylindrical groove at the bottom. A spiral rod 42 is installed through the cylindrical groove and can rotate within it. A discharge port is located at the top of the cylindrical groove and is connected to an L-shaped discharge pipe 43. A switch valve is installed on the discharge pipe 43, which is located at the upper end of the reaction chamber 11. A second chain 44 is installed between the top of the spiral rod 42 and the roller 32 at the lower end of the conveyor belt. While the drive motor 21 drives the conveyor belt and the stirring rod 22, it also drives the spiral rod 42 to rotate, conveying the solid flocculant in the dispensing box 41 into the reaction chamber 11.

[0036] A gear shaft 45 is rotatably mounted on the inner wall of the dispensing box 41. A gear disk 46 is mounted on the gear shaft 45 and is located in the middle of the dispensing box 41. The gear disk 46 can rotate within the dispensing box 41 via the gear shaft 45. A screw rod 42 meshes with the gear disk 46, and the rotation of the screw rod 42 drives the gear disk 46 to rotate. Several actuating rods 47 are provided on the surface of the gear disk 46 to prevent the solid flocculant from clumping.

[0037] See Figure 1-2 As shown, a rectangular opening is provided on the upper end of the inner wall between the reaction tank 11 and the sedimentation tank 12. A filter basket 24 is installed below the opening. Wastewater that has been fully reacted in the reaction tank 11 can flow into the sedimentation tank 12 through the opening. The filter basket 24 can filter the fiber flocs in the wastewater. A filter screen 25 is horizontally fixed at the lower end of the sedimentation tank 12. The filter screen 25 can perform secondary filtration. A sedimentation treatment component is provided below the filter screen 25.

[0038] See Figure 3-4 As shown, the sedimentation treatment assembly includes chutes 51 fixedly installed on both sides of the inner wall of the sedimentation tank 12. A slide plate 52 is installed between the two chutes 51, and the slide plate 52 can move horizontally along the chutes 51. A cleaning plate 53 is installed at the upper end of the slide plate 52, and a cleaning brush 54 is provided on the cleaning plate 53. The cleaning brush 54 contacts the filter screen 25. A scraper 55 is provided below the slide plate 52, and the scraper 55 contacts the bottom surface of the sedimentation tank 12. A reciprocating rod 56 is provided through the middle of the slide plate 52. One end of the reciprocating rod 56 passes through the inner wall between the reaction tank 11 and the sedimentation tank 12, and then through the side wall of the reaction tank 11. The reciprocating rod 56 is located below the stirring rod 22 and the stirring blade 23. A driven gear 58 is fixedly installed at the top of the reciprocating rod 56, and a main gear 57 is installed on the output shaft of the drive motor 21. The main gear 57 meshes with the driven gear 58. When the drive motor 21 drives the reciprocating rod 56 to rotate through the gear meshing relationship, the slide plate 52 can move back and forth on the reciprocating rod 56. It should be noted that the threads on the reciprocating rod 56 are only distributed in the section inside the sedimentation tank 12, and there is no threaded structure in the internal area of ​​the reaction tank 11.

[0039] During the reciprocating motion of the slide plate 52, the cleaning brush 54 can repeatedly wipe the surface of the filter screen 25. Simultaneously, the scraper 55 below the slide plate 52 also moves with the reciprocating motion of the slide plate 52. The scraper 55 can scrape the sludge and impurities settled at the bottom of the sedimentation tank 12 towards both sides. L-shaped drain troughs 28 are provided on both sides of the bottom of the sedimentation tank 12, and the drain troughs 28 are in close contact with the bottom corners of the sedimentation tank 12. The drain troughs 28 have a pull-out structure. Rectangular grooves are provided on both sides of the lower end of the sedimentation tank 12. The drain troughs 28 are located within the rectangular grooves and can move along the rectangular grooves. The drain troughs 28 can be pulled out of the sedimentation tank 12. When cleaning is required, simply pull out the drain troughs 28 to complete the cleaning work. Sealing devices are provided at the contact points between the drain troughs 28 and the sedimentation tank 12 to ensure tight contact between the drain troughs 28 and the sedimentation tank 12.

[0040] See Figure 5 As shown, a rectangular opening is provided at the upper end of the inner wall between the sedimentation tank 12 and the filter tank 13. The clear water that has settled in the sedimentation tank 12 flows into the filter tank 13 through this opening. An activated carbon layer 26 is provided at the bottom of the filter tank 13, and an outlet 27 is provided on one side of the filter tank 13. After entering the filter tank 13, the wastewater comes into full contact with the activated carbon layer 26 at the bottom. The activated carbon can adsorb residual organic matter, odor substances, some heavy metal ions, and pigments and other impurities in the wastewater. After adsorption and filtration by the activated carbon layer 26, the wastewater is further purified. The purified water continues to flow to the outlet 27 on one side of the filter tank 13 and is finally discharged from the filter tank 13, completing the entire filtration process.

[0041] The operating procedure is as follows: Wastewater is fed into the pretreatment component through the inlet cylinder 35. After being screened by the mesh in the conveyor belt, the solid sediment is transported to the collection tank. The wastewater can flow into the reaction tank 11, where solid flocculant is added through the dosing component above the reaction tank 11, and the reaction is agitated by the stirring blades 23. After the reaction, the wastewater flows to the sedimentation tank 12 for sedimentation. The sediment settles to the bottom of the sedimentation tank 12 under the action of gravity. The sliding plate 52 drives the cleaning brush 54 and scraper 55 to move back and forth simultaneously, scraping the flocculent material on the filter screen 25 and the sediment at the bottom of the sedimentation tank 12 towards the discharge trough 28, and then discharged through the discharge trough 28. The clear water that has settled in the sedimentation tank 12 can flow into the filter tank 13, and after being adsorbed and filtered by the activated carbon layer 26, it is finally discharged from the filter tank 13.

[0042] During this process, the drive motor 21 drives the stirring rod 22 to rotate, and at the same time, it drives the conveyor belt to operate through the first chain 39. It can also drive the spiral rod 42 in the dispensing component to dispense solid flocculant through the second chain 44 between the conveyor belt and the dispensing component. In addition, the slide plate 52 can be driven to move back and forth at the bottom of the sedimentation tank 12 through the gear meshing relationship.

[0043] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be primarily defined by the scope of the claims.

Claims

1. A wastewater treatment device for a chemical production process, characterized in that: It includes a reaction chamber, a sedimentation chamber, and a filter chamber. A pretreatment component is installed above the reaction chamber, a filter screen and sedimentation treatment component are installed inside the sedimentation chamber, and an activated carbon layer is installed at the bottom of the filter chamber. The pretreatment component includes a fixed frame, on which a conveyor belt is installed. The conveyor belt includes two rotating rollers and a belt. Several mesh strips are provided on the surface of the belt. Several mesh holes are provided on both the surface of the belt and the mesh strips. A water inlet is installed at the upper end of the fixed frame. A rectangular opening is provided on the bottom surface of the upper end of the fixed frame. A guide plate is provided below the rectangular opening. A stirring rod is installed inside the reaction chamber, and a drive motor is connected to the stirring rod. A first chain connects the output shaft of the drive motor to the rotating roller of the conveyor belt. The sedimentation treatment component includes a chute, a slide plate is installed on the chute, a cleaning plate and a cleaning brush are installed on the upper end of the slide plate, a scraper is provided at the lower end of the slide plate, a reciprocating rod is installed through the middle of the slide plate, a driven gear is installed at the top of the reciprocating rod, and a main gear is installed on the output shaft of the drive motor, and the main gear meshes with the driven gear.

2. The wastewater treatment device for a chemical production process according to claim 1, characterized in that: A dispensing assembly is provided above the reaction chamber. The dispensing assembly includes a dispensing box, in which a spiral rod is installed through. A discharge port is provided on one side of the dispensing box, and an L-shaped discharge pipe is connected to the discharge port. A switch valve is provided on the discharge pipe, which is located at the upper end of the reaction chamber.

3. A wastewater treatment device for a chemical production process according to claim 2, characterized in that: A second chain is installed between the top of the screw rod and the roller of the conveyor belt. A gear shaft is rotatably installed between the inner wall of the feeding box and the gear disc. The screw rod meshes with the gear disc, and several actuating levers are provided on the surface of the gear disc.

4. A wastewater treatment device for a chemical production process according to claim 1, characterized in that: A rectangular opening is provided on the upper end of the inner wall between the reaction tank and the sedimentation tank, and a filter basket is installed below the opening. The same rectangular opening is provided on the upper end of the inner wall between the sedimentation tank and the filter tank, and an outlet is provided on one side of the filter tank.

5. A wastewater treatment device for a chemical production process according to claim 1, characterized in that: One end of the reciprocating rod passes through the inner wall between the reaction tank and the sedimentation tank, and also passes through the side wall of the reaction tank. The reciprocating rod is located below the stirring rod and the stirring blade. The threads on the reciprocating rod are only distributed in the section inside the sedimentation tank, and there is no threaded structure in the internal area of ​​the reaction tank.

6. A wastewater treatment device for a chemical production process according to claim 5, characterized in that: L-shaped drain troughs are provided on both sides of the bottom of the sedimentation tank. The drain troughs are in close contact with the bottom corners of the sedimentation tank and have a pull-out structure.

7. A wastewater treatment device for a chemical production process according to claim 1, characterized in that: One end of the fixed frame is horizontal and the other end is inclined upward. The conveyor belt is installed along the direction, with one end horizontal and the other end inclined upward. The guide plate is located at the upper end of the fixed frame. A collection trough is fixedly installed on one side of the reaction box and is located below the guide plate.

8. A wastewater treatment device for a chemical production process according to claim 1, characterized in that: The water inlet cylinder is vertically installed on the horizontal side of the fixed frame, and the outer shell is fixedly installed on the outside of the fixed frame. The bottom of the outer shell has a circular opening, which is located above the reaction chamber.

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