Multistage reaction tank for heavy metal wastewater treatment

Abstract

The utility model discloses a multi-stage reaction tank for heavy metal wastewater treatment, which comprises a multi-stage treatment tank, the top of the multi-stage treatment tank is fixedly connected with a plurality of drainage devices, and one side of the bottom of the multi-stage treatment tank is fixedly connected with a filter pressing device. According to the scheme, flocculates in the settling pond are controlled to be discharged into the filter pressing box from the slag discharging opening through the slag discharging valve, filtered through the intercepting net and subjected to filter pressing through the filter pressing plate, generated water flows back into the settling pond through the circulating water pump again, flocculated filter residues obtained after filter pressing are independently recycled, recycling is more convenient, and the recycling efficiency is improved. The weighing sensor on the chemical discharge valve is used for sensing the chemical with the corresponding weight, and when the chemical with the corresponding amount is reached, the overturning valve is closed, and the chemical discharge valve is opened, so that the addition amount of the chemical is automatically adjusted according to the water inlet amount, automatic addition is realized, manual intervention is reduced, the wastewater treatment efficiency is improved, and the automation and intelligence of the reaction tank are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment reaction tanks, and more specifically, to a multi-stage reaction tank for heavy metal wastewater treatment. Background Art

[0002] Heavy metal wastewater refers to wastewater containing heavy metals discharged during the industrial production processes of mining, machinery manufacturing, chemical industry, electronics, instrumentation, etc. Heavy metal wastewater (such as cadmium, nickel, mercury, zinc, etc.) is one of the most serious industrial wastewaters that pollute the environment and are most harmful to humans. Its water quality and quantity are related to the production process. The heavy metals in the wastewater generally cannot be decomposed and destroyed, and can only be transferred to another location and its physical and chemical form. The treatment method is to first reform the production process, not use or use less toxic heavy metals, and treat them on-site at the production site (such as not discharging from the production workshop). Chemical precipitation method, ion exchange method, etc. are often used for treatment. The heavy metals in the treated water are lower than the emission standards and can be discharged or reused. The new heavy metal concentrated products are recycled or harmlessly treated as much as possible. In the process of heavy metal wastewater treatment, in order to filter some suspended matter, multi-stage flocculation reaction tanks are often used for treatment.

[0003] When using a multi-stage flocculation reaction tank to treat metal wastewater, in order to make the flocculants inside the wastewater better flocculate into large flocs, or adjust the pH value of the wastewater, it is often necessary to add various agents, and the addition of agents often requires manual operation by staff. The existing device cannot automatically add agents, and cannot allow staff to add agents in time before the agents are exhausted. Staff often need to check the device many times, which is inconvenient. When using a multi-stage flocculation reaction tank to treat wastewater, the device cannot recycle the flocculated filter residue inside the wastewater, and cleaning is not convenient enough. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a multi-stage reaction tank for heavy metal wastewater treatment, so as to solve the problem that the existing existing device cannot automatically release the agent and cannot allow the staff to add the agent in time before the agent is exhausted, and the staff is often required to check the device many times, which is inconvenient. When using the multi-stage flocculation reaction tank to treat the wastewater, the device cannot recycle the flocculated filter residue inside the wastewater, and the cleaning is not convenient enough.

[0005] To solve the above technical problems, the utility model provides the following technical solutions: a multi-stage reaction tank for heavy metal wastewater treatment, comprising a multi-stage treatment tank, the top of the multi-stage treatment tank is fixedly connected with a plurality of drainage devices, and one side of the bottom of the multi-stage treatment tank is fixedly connected with a filter press device; the multi-stage treatment tank comprises a tank body, the interior of the tank body is fixedly connected with a plurality of partition plates, the tank body is divided into a sedimentation tank and a plurality of subsequent reaction tanks by the partition plates, the bottom of the tank body is fixedly connected with supporting feet, the bottom of the tank body is provided with a slag discharge port below the sedimentation tank, the bottom ends of the sedimentation tanks are fixedly connected with the tank bottom, a slag discharge valve is provided in the middle of the tank bottom, the sedimentation tank is connected with the slag discharge port through the slag discharge valve, the bottom of the tank body is fixedly connected with a second stirring motor below the subsequent reaction tank, a second stirring member is provided on the top of the second stirring motor, and the second stirring member is rotatably installed at the bottom of the subsequent reaction tank.

[0006] Among them, the top of the pool body is located above the sedimentation tank and is fixedly connected to a first support frame, the top of the first support frame is fixedly connected to a first stirring motor, the bottom of the first stirring motor is fixedly connected to a first stirring member, the first stirring member is rotatably installed inside the sedimentation tank, and both sides of the top of the bottom of the pool are inclined surfaces.

[0007] Wherein, the filter press device includes a filter press box, which is fixedly installed at the bottom of the pool body and is located below the slag discharge port. An interception net is fixedly connected to the middle of the filter press box, and a first hydraulic cylinder is fixedly connected to one side of the upper end of the filter press box. A filter press plate slidably installed inside the filter press box is fixedly connected to one side of the first hydraulic cylinder. The filter press plate is slidably installed on the top of the interception net. A protective cover is fixedly connected to the upper end of the filter press box away from the first hydraulic cylinder. A slag discharge port is opened on the side of the upper end of the filter press box close to the protective cover, and a slag discharge pipe is fixedly connected to the lower end of the filter press box close to the protective cover.

[0008] Among them, the bottom of the protective cover is connected to one end of the top of the slag discharge pipe, and a second hydraulic cylinder is fixedly connected to one side of the protective cover. A support baffle is provided on one side of the second hydraulic cylinder, and the support baffle is embedded and installed inside the slag outlet.

[0009] The bottom surface of the filter press box is an inclined surface, and a circulating water pump is arranged on one side of the lower end of the filter press box, and a reflux pipe connected to the sedimentation tank is arranged on one side of the circulating water pump.

[0010] Wherein, the drainage device includes a second support frame fixedly installed on the top of the pool body, the top of the second support frame is fixedly connected to a medicine storage box, the top of the medicine storage box is provided with a medicine box cover, the bottom of the medicine storage box is fixedly connected to a medicine outlet nozzle, one side of the medicine outlet nozzle is provided with a flip valve, the top of the second support frame is located below the medicine outlet nozzle and is fixedly connected to a medicine receiving box, the bottom of the medicine receiving box is fixedly connected to a water outlet pipe, the water outlet pipe is connected to a subsequent reaction pool, the interior of the medicine receiving box is provided with a medicine discharge valve, the top of the medicine discharge valve is provided with a weighing sensor, one side of the water outlet pipe is fixedly connected to a water supply pipe, one end of the water supply pipe is located on one side of the water outlet pipe and a water flow meter is provided, one side of the water supply pipe is located inside an adjacent subsequent reaction pool, and one side of the water supply pipe is provided with a water pump.

[0011] Technical effects and advantages of the utility model:

[0012] In the above scheme, the flocculated materials in the sedimentation tank are controlled to be discharged from the slag discharge port into the filter press box through the slag discharge valve, filtered through the interception net, and filtered through the filter press plate. The generated water is returned to the sedimentation tank through the circulating water pump again. The flocculated filter residue after the filtration is recovered separately, which is more convenient.

[0013] The amount of liquid entering is calculated by the water flow meter, and the system automatically corresponds to the corresponding amount of weighing sensors. When adding reagents, the valve is flipped open to allow the reagents in the medicine storage box to enter the inside of the medicine receiving box. The weighing sensor on the medicine discharge valve senses the corresponding weight of the reagents. When the corresponding amount of reagents is reached, the valve is flipped closed and the medicine discharge valve is opened at the same time, so that the amount of reagents added is automatically adjusted according to the water intake, and the addition is automatically performed, which reduces human intervention, improves wastewater treatment efficiency, and improves the automation and intelligence of the reaction pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure of the multi-stage treatment pool of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the filter press device of the utility model;

[0017] Figure 4 This is a schematic diagram of the cross-sectional structure of the filter press device of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the drainage device of the utility model.

[0019] The accompanying drawings are marked as follows: 1, multi-stage treatment tank; 2, drainage device; 3, filter press device; 11, tank body; 12, support leg; 13, partition plate; 14, sedimentation tank; 15, first support frame; 16, first stirring motor; 17, first stirring member; 18, tank bottom; 19, slag discharge valve; 110, slag discharge port; 111, subsequent reaction tank; 112, second stirring motor; 113, second stirring member; 21, second support frame; 22, drug storage box; 23, medicine outlet nozzle; 24, medicine box cover; 25, flip valve; 26, medicine receiving box; 27, medicine discharge valve; 28, water outlet pipe; 29, water supply pipe; 210, water flow meter; 31, filter press box; 32, first hydraulic cylinder; 33, filter press plate; 34, interception net; 35, circulating water pump; 36, return pipe; 37, protective cover; 38, second hydraulic cylinder; 39, support baffle; 310, slag discharge pipe; 311, slag outlet. DETAILED DESCRIPTION

[0020] In order to make the technical problems to be solved, technical solutions and advantages of the present invention more clear, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0021] First embodiment

[0022] As attached Figure 1 To Attachment Figure 4 , which is an embodiment of the utility model. Through the slag discharge valve 19, the flocculants inside the sedimentation tank 14 are controlled to be discharged from the slag discharge port 110 into the interior of the filter press box 31, and are filtered through the interception net 34 and filtered through the filter press plate 33. The generated water is again returned to the interior of the sedimentation tank 14 through the circulating water pump 35, and the flocculated filter residue after the filtration is recovered separately.

[0023] A multi-stage reaction tank for heavy metal wastewater treatment, comprising a multi-stage treatment tank 1, a plurality of drainage devices 2 are fixedly connected to the top of the multi-stage treatment tank 1, a filter press device 3 is fixedly connected to one side of the bottom of the multi-stage treatment tank 1; the multi-stage treatment tank 1 comprises a tank body 11, a plurality of partition plates 13 are fixedly connected to the inside of the tank body 11, the tank body 11 is divided into a sedimentation tank 14 and a plurality of subsequent reaction tanks 111 by the partition plates 13, a support leg 12 is fixedly connected to the bottom of the tank body 11, and the bottom of the tank body 11 is located at the sedimentation tank 14. A slag discharge port 110 is provided at the bottom of the pool 14, and the bottom end of the inside of the sedimentation pool 14 is fixedly connected to the pool bottom 18. A slag discharge valve 19 is provided in the middle of the pool bottom 18. The sedimentation pool 14 is connected to the slag discharge port 110 through the slag discharge valve 19. The bottom of the pool body 11 is located below the subsequent reaction pool 111 and is fixedly connected to a second stirring motor 112. A second stirring member 113 is provided on the top of the second stirring motor 112, and the second stirring member 113 is rotatably installed at the bottom of the subsequent reaction pool 111.

[0024] Among them, the top of the tank body 11 is located above the sedimentation tank 14 and is fixedly connected to a first support frame 15, the top of the first support frame 15 is fixedly connected to a first stirring motor 16, the bottom of the first stirring motor 16 is fixedly connected to a first stirring member 17, and the first stirring member 17 is rotatably installed inside the sedimentation tank 14. The two sides of the top of the tank bottom 18 are inclined surfaces. Using the inclined surface of the tank bottom 18, the floccules fall in the water and slide on the top of the slag discharge valve 19 through the tank bottom 18. Through the drainage device 2, the clean water in the upper layer of the sedimentation tank 14 is discharged into the subsequent reaction tank 111. Subsequently, through the slag discharge valve 19, the floccules enter the interior of the filter press device 3 through the slag discharge port 110.

[0025] As attached Figure 3-4 As shown, the filter press device 3 includes a filter press box 31, which is fixedly installed at the bottom of the pool body 11 and is located below the slag discharge port 110. An interception net 34 is fixedly connected to the middle of the filter press box 31, and a first hydraulic cylinder 32 is fixedly connected to one side of the upper end of the filter press box 31. A filter press plate 33 slidably installed inside the filter press box 31 is fixedly connected to one side of the first hydraulic cylinder 32. The filter press plate 33 is slidably installed on the top of the interception net 34. A protective cover 37 is fixedly connected to the upper end of the filter press box 31 away from the first hydraulic cylinder 32. A slag discharge port 311 is provided on one side of the upper end of the filter press box 31 close to the protective cover 37. A slag discharge pipe 310 is fixedly connected to the lower end of the filter press box 31 close to the protective cover 37. The interception net 34 is used to filter and intercept flocculants entering the filter press box 31. Subsequently, the first hydraulic cylinder 32 controls the filter press plate 33 to filter the flocculants.

[0026] Among them, the bottom of the protective cover 37 is connected to one end of the top of the slag discharge pipe 310, and a second hydraulic cylinder 38 is fixedly connected to one side of the protective cover 37. A support baffle 39 is provided on one side of the second hydraulic cylinder 38. The support baffle 39 is embedded and installed in the inside of the slag outlet 311. When the protective cover 37 is located inside the slag outlet 311, the filter press plate 33, under the control of the first hydraulic cylinder 32, pushes the flocculent material to move to one side of the support baffle 39 for filter pressing. Subsequently, the second hydraulic cylinder 38 controls the support baffle 39 to contract, and the slag outlet 311 opens. The filter press plate 33 continues to push the flocculent material after filter pressing, so that it falls into the inside of the slag discharge pipe 310 and is discharged from the inside of the slag discharge pipe 310.

[0027] The bottom surface of the filter press box 31 is an inclined surface, and a circulating water pump 35 is provided on one side of the lower end of the filter press box 31 , and a reflux pipe 36 connected to the sedimentation tank 14 is provided on one side of the circulating water pump 35 .

[0028] Second embodiment

[0029] As attached Figure 1-25 is an embodiment of the present invention, by storing the corresponding medicine in the medicine storage box 22, through the water flow meter 210

[0030] The drainage device 2 includes a second support frame 21 fixedly mounted on the top of the tank body 11, a medicine storage box 22 is fixedly connected to the top of the second support frame 21, a medicine box cover 24 is arranged on the top of the medicine storage box 22, a medicine outlet nozzle 23 is fixedly connected to the bottom of the medicine storage box 22, a flip valve 25 is arranged on one side of the medicine outlet nozzle 23, a medicine receiving box 26 is fixedly connected to the top of the second support frame 21 below the medicine outlet nozzle 23, a water outlet pipe 28 is fixedly connected to the bottom of the medicine receiving box 26, and the water outlet pipe 28 is connected to the subsequent reaction tank 111, and the medicine receiving box 2 6 is provided with a discharge valve 27, a weighing sensor is provided on the top of the discharge valve 27, a water supply pipe 29 is fixedly connected to one side of the outlet pipe 28, one end of the water supply pipe 29 is located on one side of the outlet pipe 28 and a water flow meter 210 is provided, one side of the water supply pipe 29 is located inside the adjacent subsequent reaction tank 111, and a water pump is provided on one side of the water supply pipe 29. Through the water pump, the water inside the sedimentation tank 14 or the water inside the subsequent reaction tank 111 enters the inside of the next subsequent reaction tank 111 in sequence and is processed in sequence.

[0031] The working process of the utility model is as follows:

[0032] When in use, the heavy metal wastewater is in the sedimentation tank 14, and the first stirring motor 16 is used to make the first stirring member 17 stir the water in the sedimentation tank 14, and after the reagent is added to make it stir evenly, the stirring of the first stirring member 17 is stopped, and floccules are generated in the wastewater, and fall to the top of the bottom 18 of the tank by gravity. After precipitation, the drainage device 2 is started to discharge the upper clean water in the sedimentation tank 14 into the subsequent reaction tank 111. Then, the slag discharge valve 19 is opened, and the floccules are discharged from the slag discharge port 110 into the filter press box 31, and filtered through the interception net 34, and filtered through the filter plate 33. The generated water is again returned to the sedimentation tank 14 through the circulating water pump 35, and the flocculated filter residue after the filter press is recovered separately;

[0033] Under the control of the first hydraulic cylinder 32, the filter press plate 33 pushes the floccules to move to one side of the support baffle 39 for filter pressing. Then, the second hydraulic cylinder 38 controls the support baffle 39 to contract, and the slag outlet 311 opens. The filter press plate 33 continues to push the floccules after filter pressing, so that the floccules fall into the inside of the slag discharge pipe 310 and are discharged from the inside of the slag discharge pipe 310.

[0034] When the water supply pipe 29 discharges water into the next subsequent reaction tank 111, the amount of liquid entering is calculated by the water flow meter 210, and the corresponding amount of weighing sensors are automatically matched through the system. When adding medicine, the flip valve 25 is opened to allow the medicine in the medicine storage box 22 to enter the medicine receiving box 26. The weighing sensor on the medicine discharge valve 27 senses the corresponding weight of the medicine. When the corresponding amount of medicine is reached, the flip valve 25 is closed and the medicine discharge valve 27 is opened at the same time, so that the amount of medicine added is automatically adjusted according to the water intake, and the addition is automatically performed to reduce human intervention.

[0035] Finally, a few points should be explained: the drawings of the embodiments disclosed in the present utility model only involve structures related to the embodiments disclosed in the present utility model, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-stage reaction tank for heavy metal wastewater treatment, comprising a multi-stage treatment tank (1), characterized in that: A plurality of drainage devices (2) are fixedly connected to the top of the multi-stage treatment tank (1), and a filter press device (3) is fixedly connected to one side of the bottom of the multi-stage treatment tank (1); The multi-stage treatment tank (1) comprises a tank body (11), a plurality of partition plates (13) are fixedly connected inside the tank body (11), the tank body (11) is divided into a sedimentation tank (14) and a plurality of subsequent reaction tanks (111) by the partition plates (13), a support leg (12) is fixedly connected to the bottom of the tank body (11), a slag discharge port (110) is provided at the bottom of the tank body (11) below the sedimentation tank (14), and the bottom end of the sedimentation tank (14) is fixedly connected to a tank body (14). The bottom (18) of the tank is provided with a slag discharge valve (19) in the middle of the bottom (18), the sedimentation tank (14) is connected with the slag discharge port (110) through the slag discharge valve (19), the bottom of the tank body (11) is located below the subsequent reaction tank (111) and is fixedly connected with a second stirring motor (112), the top of the second stirring motor (112) is provided with a second stirring member (113), and the second stirring member (113) is rotatably installed at the bottom of the subsequent reaction tank (111).

2. The multi-stage reaction tank for heavy metal wastewater treatment according to claim 1, characterized in that: The top of the tank body (11) is located above the sedimentation tank (14) and is fixedly connected to a first support frame (15); the top of the first support frame (15) is fixedly connected to a first stirring motor (16); the bottom of the first stirring motor (16) is fixedly connected to a first stirring member (17); the first stirring member (17) is rotatably installed inside the sedimentation tank (14); and both sides of the top of the tank bottom (18) are inclined surfaces.

3. The multi-stage reaction tank for heavy metal wastewater treatment according to claim 1, characterized in that: The filter press device (3) comprises a filter press box (31), the filter press box (31) is fixedly mounted at the bottom of the tank body (11) and is located below the slag discharge port (110), the middle part of the filter press box (31) is fixedly connected to an interception net (34), one side of the upper end of the filter press box (31) is fixedly connected to a first hydraulic cylinder (32), one side of the first hydraulic cylinder (32) is fixedly connected to a filter press plate (33) slidably mounted inside the filter press box (31), the filter press plate (33) is slidably mounted on the top of the interception net (34), the upper end of the filter press box (31) away from the first hydraulic cylinder (32) is fixedly connected to a protective cover (37), a slag discharge port (311) is provided on the side of the upper end of the filter press box (31) close to the protective cover (37), and the lower end of the filter press box (31) close to the protective cover (37) is fixedly connected to a slag discharge pipe (310).

4. The multi-stage reaction tank for heavy metal wastewater treatment according to claim 3, characterized in that: The bottom of the protective cover (37) is connected to one end of the top of the slag discharge pipe (310), and a second hydraulic cylinder (38) is fixedly connected to one side of the protective cover (37). A supporting baffle (39) is provided on one side of the second hydraulic cylinder (38), and the supporting baffle (39) is embedded in the interior of the slag discharge port (311).

5. The multi-stage reaction tank for heavy metal wastewater treatment according to claim 4, characterized in that: The bottom surface of the filter press box (31) is an inclined surface, and a circulating water pump (35) is provided on one side of the lower end of the filter press box (31), and a return pipe (36) connected to the sedimentation tank (14) is provided on one side of the circulating water pump (35).

6. The multi-stage reaction tank for heavy metal wastewater treatment according to claim 1, characterized in that: The drainage device (2) comprises a second support frame (21) fixedly mounted on the top of the pool body (11); the top of the second support frame (21) is fixedly connected to a medicine storage box (22); the top of the medicine storage box (22) is provided with a medicine box cover (24); the bottom of the medicine storage box (22) is fixedly connected to a medicine outlet (23); a flip valve (25) is provided on one side of the medicine outlet (23); the top of the second support frame (21) is located below the medicine outlet (23) and is fixedly connected to a medicine receiving box (26); the bottom of the medicine receiving box (26) is fixedly connected to a A water outlet pipe (28), the water outlet pipe (28) is connected to a subsequent reaction tank (111), a medicine discharge valve (27) is arranged inside the medicine receiving box (26), a weighing sensor is arranged on the top of the medicine discharge valve (27), one side of the water outlet pipe (28) is fixedly connected to a water supply pipe (29), one end of the water supply pipe (29) is located on one side of the water outlet pipe (28) and a water flow meter (210) is arranged, one side of the water supply pipe (29) is located inside an adjacent subsequent reaction tank (111), and one side of the water supply pipe (29) is arranged with a water pump.

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