Styrene-butadiene rubber wastewater pretreatment device

Abstract

The utility model relates to a styrene-butadiene latex wastewater pretreatment device which comprises a wastewater mixing and stirring tank, a precipitation aeration tank and a dosing tank, the wastewater mixing and stirring tank is arranged at the top of the precipitation aeration tank and is connected with the precipitation aeration tank, so that styrene-butadiene latex wastewater in the wastewater mixing and stirring tank can be conveniently conveyed into the precipitation aeration tank; the top of the dosing tank is provided with a dosing metering pump used for conveying chemicals into the dosing tank, the bottom of the dosing tank is connected with a dosing pipe, the dosing pipe is connected with the wastewater mixing and stirring tank, the dosing pipe is provided with a PH probe used for detecting the PH value of the styrene-butadiene latex wastewater, and the PH probe is electrically connected with the dosing metering pump through a control unit. The styrene-butadiene latex wastewater treatment device is reasonable in design and convenient to operate, facilitates pretreatment of styrene-butadiene latex wastewater and adjustment of the adding amount of chemicals according to the PH value of the styrene-butadiene latex wastewater, and can effectively save manpower and material resources and improve the working efficiency.

Description

Technical Field:

[0001] The utility model relates to a pretreatment device for styrene-butadiene rubber wastewater. Background Art:

[0002] Styrene-butadiene rubber latex is made by emulsion copolymerization of butadiene and styrene. The wastewater of styrene-butadiene rubber latex is generated from washing tons of barrels, washing tank trucks, washing reaction kettles, chemical tests, condensation, etc. After generation, it does not become sticky or soft, but hardens. The styrene-butadiene rubber latex wastewater has a high concentration of COD and it is difficult to make the water quality qualified through general treatment. Normally, the wastewater generated in production is used for the preparation of styrene-butadiene rubber latex, but there is still some wastewater that needs to be treated.

[0003] During the collection process of styrene-butadiene rubber latex wastewater, wastewater with different concentrations may be mixed, resulting in more complex treatment. Therefore, in order to improve the treatment effect, the styrene-butadiene rubber latex wastewater is usually pretreated first. Currently, when pretreating styrene-butadiene rubber latex wastewater, some chemicals usually need to be added to the styrene-butadiene rubber latex wastewater. The traditional method is to first manually detect the pH value of the styrene-butadiene rubber latex wastewater and then adjust the dosage of the chemicals. This method is relatively inconvenient to operate and has low efficiency. Summary of the Utility Model:

[0004] The utility model makes improvements in view of the above problems existing in the prior art, that is, the technical problem to be solved by the utility model is to provide a pretreatment device for styrene-butadiene rubber wastewater.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is: a pretreatment device for styrene-butadiene rubber wastewater, including a wastewater mixing and stirring tank, a sedimentation and aeration tank, and a chemical addition tank. The wastewater mixing and stirring tank is arranged on the top of the sedimentation and aeration tank and is connected to the sedimentation and aeration tank to facilitate the conveyance of the styrene-butadiene rubber latex wastewater in the wastewater mixing and stirring tank into the sedimentation and aeration tank. A chemical addition metering pump for conveying chemicals into the chemical addition tank is arranged on the top of the chemical addition tank. A chemical addition pipe is connected to the bottom of the chemical addition tank. The chemical addition pipe is connected to the wastewater mixing and stirring tank. A pH probe for detecting the pH value of the styrene-butadiene rubber latex wastewater is arranged on the chemical addition pipe. The pH probe is electrically connected to the chemical addition metering pump through a control unit.

[0006] Further, there are three chemical addition tanks, and each chemical addition tank is connected with a chemical addition pipe. A pH probe is arranged at the outlet end of each chemical addition pipe.

[0007] Further, three overflow grooves are separately arranged in the middle of the upper surface of the wastewater mixing and stirring tank; the chemical addition pipes of the three chemical addition tanks are respectively connected to the three overflow grooves.

[0008] Further, a water inlet pipe is connected to the lower part of the left end of the wastewater mixing and stirring tank to facilitate the transportation of styrene-butadiene latex wastewater into the wastewater mixing and stirring tank, and stirring members are arranged at both the left and right ends of the wastewater mixing and stirring tank.

[0009] Further, the stirring member includes a stirring shaft vertically arranged and penetrating through the wastewater mixing and stirring tank. A spiral blade is fixed on the outer surface of the stirring shaft, and the spiral blade is located inside the wastewater mixing and stirring tank; the stirring shaft is connected to a stirring motor installed on the top of the wastewater mixing and stirring tank.

[0010] Further, an overflow pipe is arranged inside the wastewater mixing and stirring tank, and the styrene-butadiene latex wastewater in the wastewater mixing and stirring tank overflows into the sedimentation and aeration tank through the overflow pipe.

[0011] Further, an air supply pipe is connected to the top of the sedimentation and aeration tank, and the air supply pipe penetrates into the sedimentation and aeration tank. A supernatant overflow trough is arranged at the upper end of the sedimentation and aeration tank, and a sludge outlet is arranged at the bottom of the sedimentation and aeration tank.

[0012] Further, it further includes a bracket, and the sedimentation and aeration tank is installed on the bracket.

[0013] Compared with the prior art, the utility model has the following effects: The utility model is reasonably designed, convenient for pretreatment of styrene-butadiene latex wastewater, and convenient for adjusting the dosage of the medicament according to the pH value of the styrene-butadiene latex wastewater. The operation is convenient, which can effectively save manpower and material resources and improve work efficiency. Description of the drawings:

[0014] Figure 1 is a schematic structural diagram of an embodiment of the utility model;

[0015] Figure 2 is a schematic internal structural diagram of the wastewater mixing and stirring tank in the embodiment of the utility model;

[0016] Figure 3 is a schematic structural diagram of the chemical dosing tank in the embodiment of the utility model.

[0017] 1. Chemical dosing pipe; 4. Stirring member; 41. Stirring motor; 42. Spiral blade; 5. Overflow ditch; 6. Wall of the wastewater mixing and stirring tank; 7. Overflow pipe; 8. Water inlet pipe; 9. Air supply pipe; 10. Wall of the sedimentation and aeration tank; 11. Sludge outlet; 12. Bracket; 13. Supernatant overflow trough; 14. Sedimentation and aeration tank; 15. Wastewater mixing and stirring tank; 16. Chemical dosing tank; 17. Chemical dosing pump. Detailed implementation method:

[0018] The following further describes the utility model in detail with reference to the drawings and specific implementation methods.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0020] As Figures 1 to 3 shown, a pretreatment device for styrene-butadiene rubber wastewater of the present utility model includes a wastewater mixing and stirring tank 15, a sedimentation and aeration tank 14, and a chemical dosing tank 16. The wastewater mixing and stirring tank 15 is arranged on the top of the sedimentation and aeration tank 14 and is connected to the sedimentation and aeration tank 14 to facilitate the conveyance of the styrene-butadiene rubber latex wastewater in the wastewater mixing and stirring tank into the sedimentation and aeration tank. A chemical dosing metering pump 17 for conveying chemicals into the chemical dosing tank is arranged on the top of the chemical dosing tank 16. A chemical dosing pipe 1 is connected to the bottom of the chemical dosing tank 16, and the chemical dosing pipe is used to output the chemicals in the chemical dosing tank. The chemical dosing pipe 1 is connected to the wastewater mixing and stirring tank 15 to facilitate the conveyance of the chemicals to the wastewater mixing and stirring tank. A pH probe for detecting the pH value of the styrene-butadiene rubber latex wastewater is arranged on the chemical dosing pipe 1, and the pH probe is electrically connected to the chemical dosing metering pump 17 through a control unit. The pH probe detects the pH value of the styrene-butadiene rubber latex wastewater, and the pH value data is fed back to the chemical dosing metering pump at the top of the chemical dosing tank to adjust the chemical dosing amount in real time, that is, the chemical dosing tank can automatically adjust according to the real-time feedback of the pH value data of the treated wastewater. The structure is simple and the operation is convenient, which can realize the pretreatment of the styrene-butadiene rubber latex wastewater and facilitate the subsequent wastewater treatment.

[0021] In this embodiment, the chemical dosing metering pump is a centrifugal pump.

[0022] In this embodiment, there are three chemical dosing tanks 16, and each chemical dosing tank 16 is respectively connected with a chemical dosing pipe 1, and a pH probe is arranged at the outlet end of each chemical dosing pipe 1.

[0023] In this embodiment, three overflow grooves 5 are separately arranged in the middle part of the upper surface of the wastewater mixing and stirring tank 15; the chemical dosing pipes 1 of the three chemical dosing tanks 16 are respectively connected to the three overflow grooves 5. The overflow grooves are used to make the styrene-butadiene rubber latex wastewater after the first treatment be fully mixed with the chemicals again, and the pH probe detects the pH value of the styrene-butadiene rubber latex wastewater in the overflow grooves.

[0024] In this embodiment, a water inlet pipe 8 is connected to the lower part of the left end of the wastewater mixing and stirring tank 15, and the water inlet pipe 8 is used to convey the styrene-butadiene rubber latex wastewater into the interior of the wastewater mixing and stirring tank 15. Stirring members 4 are arranged at both the left and right ends of the wastewater mixing and stirring tank 15, and the stirring assembly is used to stir the styrene-butadiene rubber latex wastewater.

[0025] In this embodiment, the stirring member 4 is disposed inside the chemical addition pipes 1 on both the left and right sides. The stirring member 4 includes a stirring shaft vertically arranged and penetrating through the wastewater mixing and stirring tank 15. A spiral blade 42 is fixed on the outer surface of the stirring shaft, and the spiral blade 42 is located inside the wastewater mixing and stirring tank 15. The stirring shaft is connected to a stirring motor 41 installed on the top of the wastewater mixing and stirring tank 15. The spiral blade is not fixedly connected to the inner wall of the wastewater mixing and stirring tank, and the stirring motor drives the spiral blade to rotate through the stirring shaft.

[0026] In this embodiment, an overflow pipe 7 is disposed inside the wastewater mixing and stirring tank 15. The styrene-butadiene latex wastewater in the wastewater mixing and stirring tank 15 overflows into the sedimentation and aeration tank 14 via the overflow pipe 7.

[0027] In this embodiment, an aeration pipe 9 is connected to the top of the sedimentation and aeration tank 14. The aeration pipe 9 extends into the sedimentation and aeration tank 14. An upper clear liquid overflow trough 13 is fixedly arranged at the upper end of the sedimentation and aeration tank 14 to facilitate the overflow of the upper clear liquid. A sludge outlet 11 is arranged at the bottom of the sedimentation and aeration tank 14 to facilitate the discharge of sludge. The styrene-butadiene latex wastewater flows into the sedimentation and aeration tank 14 from the top through the overflow pipe 7. The styrene-butadiene latex wastewater is mixed with the chemical agent again through the aeration pipe 9. During this period, the outflow of the upper clear liquid from the overflow trough 13 can be controlled by adjusting the amount of aeration. The precipitated sludge flows out through the sludge outlet 11.

[0028] It should be noted that the aeration pipe and the motor are both prior arts, and those skilled in the art have been able to clearly understand them, so no detailed description will be given here.

[0029] In this embodiment, a bracket 12 is further included, and the sedimentation and aeration tank 14 is installed on the bracket 12.

[0030] In this embodiment, a delivery pump for transporting wastewater is connected to the water inlet pipe.

[0031] In this embodiment, during operation: Styrene-butadiene latex wastewater is introduced into the wastewater mixing and stirring tank 15 through the water inlet pipe. Here, the inlet flow rate of the styrene-butadiene latex wastewater can be changed by adjusting the power of the delivery pump connected to the water inlet pipe 8 to control the treatment effect of the styrene-butadiene latex wastewater. The stirring motor 41 is turned on, and at the same time, the real-time data of the wastewater is transmitted through the pH probe on the chemical addition pipe 1, fed back to the chemical agent metering pump at the top of the chemical addition tank, and the amount of chemical agent is adjusted at all times to control the water quality of the styrene-butadiene latex wastewater. During the initial stage of operation, the mixing situation of the styrene-butadiene latex wastewater and the chemical agent needs to be monitored at all times. Finally, the styrene-butadiene latex wastewater flowing out of the overflow pipe 7 should be clear and have obvious flocculent substances. The styrene-butadiene latex wastewater flows into the sedimentation and aeration tank 14 from the top through the overflow pipe 7. The styrene-butadiene latex wastewater is mixed with the chemical agent again through the aeration pipe 9. During this period, the outflow of the upper clear liquid from the overflow trough 13 can be controlled by adjusting the amount of aeration. The precipitated sludge flows out through the sludge outlet 11.

[0032] The advantages of the present utility model are as follows: By providing a stirring motor, spiral blades, a chemical adding pipe, an overflow ditch, an aeration pipe, an overflow pipe and a supernatant overflow tank, the stirring motor drives the spiral blades to rotate, so that the styrene-butadiene latex wastewater and the chemical agent are fully mixed. At the same time, the overflow ditch is used to make the styrene-butadiene latex wastewater treated for the first time and the chemical agent fully mixed again; the overflow pipe is used to make the styrene-butadiene latex wastewater treated for three times enter the precipitation aeration tank, and the supernatant and the precipitation scum are separated through the aeration pipe, the supernatant overflow tank and the sludge outlet. The overall structure is simple and the operation is convenient, which can effectively save manpower and material resources and improve work efficiency.

[0033] If the present utility model discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or it can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by an integral casting process) (except when it is obviously impossible to adopt the integral forming process).

[0034] In addition, the terms used to represent the positional relationship or shape in any of the technical solutions disclosed in the present utility model shall, unless otherwise stated, include states or shapes that are approximate, similar or close to it.

[0035] Any component provided by the present utility model can either be assembled from a plurality of separate components or be a single component manufactured by an integral forming process.

[0036] Finally, it should be noted that: The above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them; although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the specific implementation manners of the present utility model or make equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present utility model, they should all be covered within the scope of the technical solutions claimed by the present utility model.

Claims

1. A pretreatment device for styrene-butadiene rubber wastewater, characterized in that: It includes a wastewater mixing and stirring tank, a sedimentation and aeration tank, and a chemical dosing tank. The wastewater mixing and stirring tank is arranged on the top of the sedimentation and aeration tank and connected to the sedimentation and aeration tank to facilitate the delivery of styrene-butadiene rubber latex wastewater in the wastewater mixing and stirring tank into the sedimentation and aeration tank. At the top of the chemical dosing tank, there is a chemical dosing metering pump for delivering chemicals into the chemical dosing tank. The bottom of the chemical dosing tank is connected with a chemical dosing pipe, and the chemical dosing pipe is connected to the wastewater mixing and stirring tank. A pH probe for detecting the pH value of the styrene-butadiene rubber latex wastewater is arranged on the chemical dosing pipe, and the pH probe is electrically connected to the chemical dosing metering pump through a control unit.

2. The pretreatment device for styrene-butadiene rubber wastewater according to claim 1, wherein: There are three chemical dosing tanks, and each chemical dosing tank is connected with a chemical dosing pipe. The outlet end of each chemical dosing pipe is provided with a pH probe.

3. The pretreatment device for styrene-butadiene rubber wastewater according to claim 2, wherein: In the middle part of the upper surface of the wastewater mixing and stirring tank, three overflow channels are separately arranged; the chemical dosing pipes of the three chemical dosing tanks are respectively connected to the three overflow channels.

4. A pretreatment device for styrene-butadiene rubber wastewater according to claim 1, characterized in that: At the lower part of the left end of the wastewater mixing and stirring tank, there is an inlet pipe for facilitating the delivery of styrene-butadiene rubber latex wastewater into the interior of the wastewater mixing and stirring tank. Stirring members are arranged at both the left and right ends of the wastewater mixing and stirring tank.

5. The pretreatment device for styrene-butadiene rubber wastewater according to claim 4, wherein: The stirring member includes a stirring shaft vertically arranged and penetrating through the wastewater mixing and stirring tank. A spiral blade is fixed on the outer surface of the stirring shaft, and the spiral blade is located inside the wastewater mixing and stirring tank; the stirring shaft is connected to a stirring motor installed on the top of the wastewater mixing and stirring tank.

6. The pretreatment device for styrene-butadiene rubber wastewater according to claim 1, characterized in that: An overflow pipe is arranged inside the wastewater mixing and stirring tank, and the styrene-butadiene rubber latex wastewater in the wastewater mixing and stirring tank overflows into the sedimentation and aeration tank through the overflow pipe.

7. The pretreatment device for styrene-butadiene rubber wastewater according to claim 1, wherein: An air supply pipe is connected to the top of the sedimentation and aeration tank, and the air supply pipe leads into the interior of the sedimentation and aeration tank. An upper clear liquid overflow trough is arranged at the upper end of the sedimentation and aeration tank, and a sludge outlet is arranged at the bottom of the sedimentation and aeration tank.

8. A pretreatment device for styrene-butadiene rubber wastewater according to claim 1, characterized in that: It also includes a bracket, and the sedimentation and aeration tank is installed on the bracket.

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