Water treatment and mixing integrated equipment

Abstract

The utility model relates to the technical field of water treatment, and particularly discloses water treatment and mixing integrated equipment which comprises a tank body, a reaction pipe, a sewage inlet pipe, a stirring device, an inclined pipe deposition area and a sludge scraping device, a sludge discharge port is formed in the bottom of the tank body, and the reaction pipe is fixedly arranged in the tank body and is coaxial with the tank body; the sewage inlet pipe is used for introducing sewage into the reaction pipe, and the stirring device is used for stirring the sewage and chemicals in the reaction pipe; the inclined tube deposition area is arranged in the middle of the tank body and used for accelerating sedimentation of suspended particles in water, and the lower end of the reaction tube is located below the inclined tube deposition area; the sludge scraping device is used for scraping sludge deposited in the tank body. The device can realize integration of coagulation, clarification and sludge concentration, and is beneficial to simplification of the technological process and reduction of the occupied area of equipment.

Description

Technical Field

[0001] This application relates to the field of water treatment technology, and in particular to an integrated water treatment mixing and clarification device. Background Technology

[0002] In conventional water treatment processes, coagulation (mixing / flocculation), clarification and separation, and sludge thickening are carried out in separate equipment units: first, the chemical reaction and floc growth are completed in the mixing tank and flocculation tank, and then the sludge is transported to the clarification tank for sludge-water separation. Finally, the settled sludge is pumped into the thickening tank for secondary treatment. This mode has disadvantages such as a long process flow, large footprint, and high operating costs. Utility Model Content

[0003] In order to achieve integrated coagulation, clarification and sludge thickening, this application provides a water treatment integrated coagulation and clarification device.

[0004] The water treatment integrated mixing and settling equipment provided in this application adopts the following technical solution:

[0005] A water treatment mixing and settling integrated device, comprising:

[0006] The tank body has a sludge discharge outlet at its bottom;

[0007] The reaction tube is fixedly installed in the tank and is coaxial with the tank.

[0008] Wastewater inlet pipe, used to introduce wastewater into the reaction pipe;

[0009] A stirring device is used to stir the wastewater and reagents in the reaction tube;

[0010] An inclined tube sedimentation zone is located in the middle of the tank to accelerate the sedimentation of suspended particles in the water, and the lower end of the reaction tube is located below the inclined tube sedimentation zone.

[0011] A sludge scraping device is used to scrape the sludge deposited at the bottom of the tank to the sludge discharge port.

[0012] Wastewater is injected into the reaction tube through the wastewater inlet pipe. At the same time, flocculants, coagulants, and coagulant aids are added to the reaction tube. Under the stirring of the agitator, the wastewater reacts with the chemicals to produce sludge sedimentation. The sludge sedimentation and water are discharged from the lower end of the reaction tube and enter the tank. The water mixed with sludge flows from bottom to top through the inclined tube sedimentation zone. The water flows in from the bottom of the inclined tube and slowly rises along the inclined channel. The suspended particles settle to the tube wall under gravity and slide down the inclined surface into the sludge zone at the bottom of the tank. The clear water is discharged from the top of the tank. The sludge is deposited at the bottom of the tank and scraped off by the sludge scraper to the sludge discharge outlet for enrichment and concentration. In this way, coagulation, clarification and sludge concentration are integrated, which helps to simplify the process flow and reduce the equipment footprint.

[0013] Furthermore, the inlet end of the sewage inlet pipe is located outside the tank, and the outlet end is located inside the reaction tube, with the outlet end of the sewage inlet pipe opening upwards.

[0014] The wastewater inlet pipe injects wastewater from outside the tank into the reaction tube. The upward-facing opening of the wastewater inlet pipe extends the movement path of the wastewater in the reaction tube, thus facilitating full contact and reaction between the wastewater and the reagent.

[0015] Furthermore, the stirring device includes a stirring shaft and multiple stirring blades. The stirring shaft is rotatably disposed in the reaction tube, and the stirring blades are fixed to the outer periphery of the stirring shaft. The multiple stirring blades are distributed at intervals along the length direction of the stirring shaft.

[0016] The stirring blades agitate the wastewater, flocculants, coagulants, and coagulant aids in the reaction tube to accelerate the reaction and promote the coagulation process.

[0017] Furthermore, the sludge scraping device includes a rotating rod and a plurality of sludge scraping blades. The rotating rod is horizontally arranged and fixed to the lower end of the stirring shaft, and the plurality of sludge scraping blades are fixed to the rotating rod and spaced apart along the length of the rotating rod.

[0018] Furthermore, the bottom of the tank is a cone shape with the tip pointing downwards.

[0019] The sludge deposited at the bottom of the tank can slide down the conical surface under the push of the scraper to the sludge discharge outlet for enrichment, thereby achieving sludge concentration.

[0020] Furthermore, the lower end of the reaction tube is provided with a flared diffusion and diversion structure.

[0021] The flared diffusion and diversion structure guides the flow of water in the reaction tube, helping the water to diffuse outwards after entering the tank, thereby improving the uniformity of sludge settling.

[0022] Furthermore, a water outlet weir plate is provided on the upper part of the tank.

[0023] The height of the top of the outlet weir plate determines the water level inside the tank. Clear water overflows from the inside of the outlet weir plate to the outside of the outlet weir plate, ensuring that the settled clear water is discharged evenly.

[0024] Furthermore, a backflushing inlet is provided at the bottom of the tank on the side opposite to the sludge discharge outlet. The backflushing inlet is connected to a water source and is equipped with a backflushing inlet valve.

[0025] Opening the backflushing inlet valve allows for backflushing and diluting of the sludge clogging the bottom of the tank, helping to prevent blockage of the sludge discharge outlet.

[0026] Furthermore, the tank body is provided with multiple sampling ports, which are located below the inclined tube deposition zone, and the multiple sampling ports are distributed at intervals along the depth direction of the tank body.

[0027] By opening the sampling port, liquid samples can be taken from the tank.

[0028] Furthermore, the tank is equipped with a sludge interface detection device for detecting the position of the sludge interface in the tank.

[0029] The sludge interface detection device detects the position of the sludge interface in the tank, which facilitates sludge discharge operations based on the position of the sludge interface in the tank.

[0030] In summary, this application includes at least one of the following beneficial technical effects:

[0031] 1. This application integrates coagulation, clarification and sludge thickening into one process. The equipment has a compact structure. Compared with the traditional process where coagulation, clarification and sludge thickening are performed separately, this application simplifies the process flow and reduces the equipment footprint.

[0032] 2. By setting up a backflushing circuit, the sludge at the bottom of the tank is backflushed and diluted, which helps to prevent the sludge discharge outlet from becoming blocked. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0034] Reference numerals: 1. Tank; 11. Sewage inlet pipe; 12. Clean water outlet pipe; 13. Clean water emergency discharge port; 131. Drain valve; 14. Sludge outlet; 141. Sludge discharge valve; 15. Backwash inlet; 151. Backwash inlet valve; 16. Sampling port; 161. Sampling valve; 2. Reaction tube; 21. Diffusion and diversion structure; 3. Effluent weir plate; 4. Inclined tube sedimentation zone; 5. Stirring device; 51. Stirring shaft; 52. Stirring blades; 6. Sludge scraping device; 61. Rotating rod; 62. Sludge scraper; 7. Sludge interface detection device. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0036] This application discloses an integrated water treatment mixing and clarification device. (Refer to...) Figure 1 The integrated water treatment mixing and settling equipment includes a tank 1, a reaction pipe 2, a sewage inlet pipe 11, a stirring device 5, an inclined tube sedimentation zone 4, and a sludge scraping device 6.

[0037] Specifically, refer to Figure 1The tank 1 is made of steel and is cylindrical or square. The reaction pipe 2 is cylindrical and fixedly installed inside the tank 1, coaxial with the tank 1. The inside of the reaction pipe 2 is the space where wastewater reacts with flocculants, coagulants, coagulant aids, and other agents. The wastewater inlet pipe 11 is located at the top of the tank 1 and is used to introduce wastewater into the reaction pipe 2. The inlet end of the wastewater inlet pipe 11 is located outside the tank 1, and the outlet end of the wastewater inlet pipe 11 is located inside the reaction pipe 2 with its opening facing upwards.

[0038] In one embodiment, wastewater is injected into the reaction pipe 2 through the wastewater inlet pipe 11, and flocculants, coagulants, coagulant aids and other agents are added into the reaction pipe 2 from the upper end of the reaction pipe 2. In another feasible embodiment, the wastewater and agents are pre-mixed and then injected into the reaction pipe 2 through the wastewater inlet pipe 11.

[0039] The stirring device 5 is used to stir the wastewater and reagents in the reaction tube 2, as per [reference]. Figure 1 The stirring device 5 includes a stirring shaft 51 and multiple stirring blades 52. The stirring shaft 51 is coaxially arranged with the reaction tube 2 and rotatably disposed within the reaction tube 2. The stirring blades 52 are fixed to the outer periphery of the stirring shaft 51, and the multiple stirring blades 52 are spaced apart along the length of the stirring shaft 51. The stirring shaft 51 is driven to rotate by a motor, and the stirring blades 52 stir and mix the wastewater and agents such as flocculants, coagulants, and coagulant aids in the reaction tube 2 to accelerate the reaction and promote the coagulation process.

[0040] Figure 1 The arrows indicate the direction of water flow. As wastewater is continuously introduced into reaction pipe 2 for reaction, the water in reaction pipe 2, carrying flocculants, flows downwards along it. The flow rate of the water in reaction pipe 2 is controlled by the flow rate of the introduced wastewater. (Refer to...) Figure 1 The lower end of the reaction tube 2 is provided with a flared diffusion and diversion structure 21. The diffusion and diversion structure 21 helps the water in the reaction tube 2 to carry the flocculent into the tank 1 and then diffuse to the surrounding area, thereby improving the uniformity of sludge settling.

[0041] To achieve sludge and water separation, refer to... Figure 1 The inclined tube sedimentation zone 4 is located in the middle of the tank 1 to accelerate the sedimentation of suspended particles in the water. The lower end (outlet end) of the reaction tube 2 is located below the inclined tube sedimentation zone 4. The inclined tube sedimentation zone 4 is composed of densely arranged inclined tubular or plate-shaped materials (such as polyvinyl chloride and polypropylene plastic), with an inclination angle of about 60°. The cross-section of the inclined tubes is mostly hexagonal (honeycomb), and the inclined plates are parallel flat plates, forming multiple narrow sedimentation channels.

[0042] Water carrying flocculants (suspended particles) is discharged from the lower end of the reaction pipe 2 into the tank 1, and passes through the inclined tube sedimentation zone 4 from bottom to top. The water flows in from the bottom of the inclined tube and slowly rises along the inclined channel. The suspended particles settle to the tube wall under the action of gravity and slide down the inclined surface to the bottom of the tank 1, realizing the separation of sludge and clean water. As sewage is continuously introduced, sludge is continuously deposited and enriched at the bottom of the tank 1.

[0043] Reference Figure 1 The sludge scraping device 6 includes a rotating rod 61 and multiple scraper blades 62. The rotating rod 61 is horizontally positioned and fixed to the lower end of the stirring shaft 51. The multiple scraper blades 62 are fixed to the rotating rod 61 and spaced apart along the length of the rotating rod 61. The bottom of the tank body 1 is tapered with its tip pointing downwards, and a certain gap can be reserved between the scraper blades 62 and the inner bottom wall of the tank body 1. Furthermore, a sludge discharge outlet 14 is provided at the bottom of the tank body 1, and a sludge discharge valve 141 is installed at the sludge discharge outlet 14.

[0044] The rotating rod 61 rotates slowly with the stirring shaft 51. The sludge deposited at the bottom of the tank 1 can slide down the conical surface under the push of the scraper to the sludge discharge port 14 for enrichment, thereby achieving sludge concentration. Opening the sludge discharge valve 141 allows the sludge to be discharged from the sludge discharge port 14 and enter the subsequent processing steps.

[0045] To facilitate sludge discharge operations based on the location of the sludge interface in tank 1, refer to... Figure 1 The tank 1 is equipped with a sludge interface detection device 7, which is used to detect the position of the sludge interface in the tank 1. The sludge interface detection device 7 can detect the interface position between the sludge zone and the clear liquid zone based on characteristics such as differences in medium density, optical properties, conductivity, or acoustic impedance between the sludge and the clear liquid. When there is a large amount of sludge deposited in the tank 1, the sludge discharge valve 141 is opened manually or automatically to discharge the sludge.

[0046] To avoid clogging of sludge discharge outlet 14, refer to Figure 1 A backflushing inlet 15 is provided at the bottom of the tank body 1 on the opposite side of the sludge discharge outlet 14. The backflushing inlet 15 is connected to an external water source through a water pipe, and a backflushing inlet valve 151 is installed at the backflushing inlet 15. Opening the backflushing inlet valve 151 backflushes and dilutes the sludge that is blocked at the bottom of the tank body 1, which helps to prevent the sludge discharge outlet 14 from becoming blocked.

[0047] To ensure the water is discharged evenly and stably, refer to... Figure 1 The upper part of the tank body 1 is equipped with a water outlet weir plate 3, the weir opening of which is V-shaped or sawtooth-shaped; a clean water outlet pipe 12 is connected to the outside of the water outlet weir plate 3. The height of the top of the water outlet weir plate 3 determines the water level in the tank body 1. The clean water in the tank body 1 overflows from the inside of the water outlet weir plate 3 to the outside of the water outlet weir plate 3, and is discharged through the clean water outlet pipe 12 into the subsequent treatment process. The flow rate of the clean water is controlled by the flow rate of the sewage entering.

[0048] Furthermore, referring to Figure 1 The tank body 1 is provided with multiple sampling ports 16, which are located below the inclined tube deposition zone 4. The multiple sampling ports 16 are distributed at intervals along the depth direction of the tank body 1, and each sampling port 16 is equipped with a sampling valve 161. By opening the sampling valve 161, liquid at the corresponding depth in the tank body 1 can be sampled.

[0049] Reference Figure 1 The tank body 1 is also equipped with a clean water emergency discharge port 13, which is fitted with a drain valve 131. Opening the drain valve 131 allows for emergency discharge of the liquid in the tank body 1.

[0050] The implementation principle of the integrated coagulation and clarification water treatment equipment in this application embodiment is as follows: During water treatment, wastewater is continuously injected into the reaction pipe 2 through the wastewater inlet pipe 11. At the same time, flocculants, coagulants, and coagulant aids are added to the reaction pipe 2. Under the stirring of the stirring device 5, the wastewater reacts with the agents to produce sludge sedimentation. The sludge sedimentation and water are discharged from the lower end of the reaction pipe 2 and enter the tank 1. The water mixed with sludge flows from bottom to top through the inclined tube sedimentation zone 4. The water flows in from the bottom of the inclined tube and slowly rises along the inclined channel. The suspended particles settle to the tube wall under the action of gravity and slide down the inclined surface into the sludge zone at the bottom of the tank 1. The clean water overflows from the outlet weir plate 3 and is discharged from the tank 1 through the clean water outlet pipe 12, realizing the separation of sludge and clean water. The sludge deposited at the bottom of the tank 1 is scraped off by the sludge scraper 6 to the sludge discharge outlet 14 for enrichment and concentration. In this way, integrated coagulation, clarification and sludge concentration and continuous water treatment are realized, which is beneficial to simplify the process flow and reduce the equipment footprint.

[0051] The above-mentioned integrated water treatment equipment was used for mine water treatment. The influent and effluent water quality were tested as follows:

[0052] Mine water treatment project 1: Treatment capacity 200t / h

[0053]

[0054] Mine water treatment project 2: Treatment capacity 120t / h

[0055]

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A water treatment mixing and clarification integrated device, characterized in that: include: The tank body has a sludge discharge outlet at its bottom; The reaction tube is fixedly installed in the tank and is coaxial with the tank. Wastewater inlet pipe, used to introduce wastewater into the reaction pipe; A stirring device is used to stir the wastewater and reagents in the reaction tube; An inclined tube sedimentation zone is located in the middle of the tank to accelerate the sedimentation of suspended particles in the water, and the lower end of the reaction tube is located below the inclined tube sedimentation zone. A sludge scraping device is used to scrape the sludge deposited at the bottom of the tank to the sludge discharge port.

2. The water treatment mixing and settling integrated equipment according to claim 1, characterized in that: The inlet end of the sewage inlet pipe is located outside the tank, and the outlet end is located inside the reaction tube, with the outlet end of the sewage inlet pipe facing upwards.

3. The water treatment mixing and settling integrated equipment according to claim 1, characterized in that: The stirring device includes a stirring shaft and multiple stirring blades. The stirring shaft is rotatably disposed in the reaction tube, and the stirring blades are fixed to the outer periphery of the stirring shaft. The multiple stirring blades are distributed at intervals along the length direction of the stirring shaft.

4. The water treatment mixing and settling integrated equipment according to claim 3, characterized in that: The sludge scraping device includes a rotating rod and multiple scraper blades. The rotating rod is horizontally positioned and fixed to the lower end of the stirring shaft. The multiple scraper blades are fixed to the rotating rod and spaced apart along the length of the rotating rod.

5. The water treatment mixing and settling integrated equipment according to claim 4, characterized in that: The bottom of the tank is cone-shaped with the pointed end facing downwards.

6. The water treatment mixing and settling integrated equipment according to claim 1, characterized in that: The lower end of the reaction tube is provided with a flared diffusion and diversion structure.

7. The water treatment mixing and settling integrated equipment according to claim 1, characterized in that: The upper part of the tank is equipped with a water outlet weir plate.

8. The water treatment mixing and settling integrated equipment according to claim 1, characterized in that: The bottom of the tank is provided with a backwash inlet on the opposite side of the sludge discharge outlet. The backwash inlet is connected to a water source and is equipped with a backwash inlet valve.

9. A water treatment mixing and settling integrated device according to claim 1, characterized in that: The tank is provided with multiple sampling ports, which are located below the inclined tube deposition zone, and the multiple sampling ports are distributed at intervals along the depth direction of the tank.

10. A water treatment mixing and settling integrated device according to claim 1, characterized in that: The tank is equipped with a sludge interface detection device for detecting the position of the sludge interface in the tank.

Images