Waste water treatment equipment for natural rubber production

Abstract

The utility model provides wastewater treatment equipment for natural rubber production, which comprises a homogeneous regulating tank, a pH regulating tank, electric flocculation equipment, a self-floating tank, a DAT-IAT tank and a clean water tank which are arranged in sequence, the self-floating tank comprises a tank body, a water inlet pipe and a water outlet pipe are arranged on the side surface of the tank body, a slag discharge pipe is arranged at the bottom of the tank body, a funnel is arranged on the upper side of the tank body, a scum discharge pipe is arranged at the lower part of the funnel, and a water outlet pipe is arranged on the lower part of the funnel. And a scraping plate is arranged above the funnel and is driven by a motor. The device is simple and reliable in process, and has the advantages of high volume load, large hydraulic load, short residence time, small occupied area, low investment, low energy consumption and operation cost, environment-friendly field, high automation degree and stable effluent reaching the discharge standard.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental protection facilities, and in particular relates to wastewater treatment equipment for natural rubber production. Background Art

[0002] The wastewater discharged during the natural rubber processing process is a high-concentration organic wastewater with high acidity, high CODcr content, high ammonia nitrogen and total phosphorus concentrations, high suspended solids and bacteria. If it is discharged directly without treatment, it will pollute the surrounding environment, affect river water quality, and disrupt the ecological balance. The wastewater from domestic natural rubber processing plants has basically not been effectively treated, especially the removal of total phosphorus. Nitrogen and phosphorus pollution are the main causes of eutrophication of water bodies. The removal of nitrogen and phosphorus in wastewater has become a hot topic and difficulty in the field of water treatment research. At present, anaerobic-aerobic methods are generally used to treat natural rubber processing wastewater. Among them, aerobic methods mostly use contact oxidation, multi-stage oxidation ponds, single oxidation ditches, etc., which not only occupy large tracts of land, but also have low removal rates of total nitrogen and total phosphorus. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model proposes a wastewater treatment equipment for natural rubber production, which has a simple process system structure, small footprint, and stable effluent that meets discharge standards.

[0004] The technical solution of the utility model is achieved as follows: a wastewater treatment device for natural rubber production, comprising a homogenization regulating tank, a pH regulating tank, an electric flocculation device, a self-floating tank, a DAT-IAT tank and a clear water tank arranged in sequence, wherein the self-floating tank comprises a tank body, a water inlet pipe and a water outlet pipe are provided on the side of the tank body, a slag discharge pipe is provided at the bottom, a funnel is provided on the upper side, a slag discharge pipe is provided at the lower part of the funnel, a scraper is provided above the funnel, and the scraper is driven by a motor.

[0005] Preferably, the pH adjustment tank is provided with a sodium hydroxide dosing device and a flocculant dosing device, and a PAM dosing device is provided between the electric flocculation equipment and the self-floating tank.

[0006] Preferably, the method further comprises a sludge recovery pool, which is respectively connected to the sludge discharge pipe of the self-floating tank, the sludge discharge pipe and the sludge discharge pipe of the DAT-IAT tank.

[0007] Beneficial effects of the utility model:

[0008] 1. Electrocoagulation replaces the hydrolysis-acidification, anoxic, and anaerobic treatment units in traditional processes. It has a high volumetric load, a large hydraulic load, and a short residence time (compared with the several days of anaerobic residence time in traditional natural rubber wastewater treatment processes, the residence time of the electrocoagulation process is less than 1 hour). Therefore, it reduces the footprint (only 30% of the traditional natural rubber wastewater treatment process) and the investment (saving 30% of the investment). It is environmentally friendly on site and greatly reduces odor pollution in and around the sewage treatment plant. The electrocoagulation process simultaneously removes phosphorus, which makes up for the poor phosphorus removal effect of the biochemical treatment process.

[0009] 2. The use of a self-floating tank removes the scum that cannot be settled, greatly reducing the processing burden of the subsequent DAT-IAT process steps.

[0010] 3. The DAT-IAT pool occupies a small area and combines electrocoagulation equipment and self-floating tanks. The process is simple and reliable. It has the advantages of high volumetric load, large hydraulic load, short residence time, small footprint, low investment, low energy consumption and operating costs, friendly on-site environment, high degree of automation, and stable effluent that meets emission standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2 It is a structural diagram of the self-floating tank;

[0013] Figure 3 for Figure 2 Schematic diagram from top view;

[0014] In the figure: 1- homogenization regulating tank, 2- pH regulating tank, 3- electric flocculation equipment, 4- self-floating tank, 5- DAT-IAT tank, 6- sludge recovery tank, 7- clear water tank, 8- fan room, 9- sodium hydroxide dosing device, 10- flocculant dosing device, 11- PAM dosing device. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] like Figures 1 to 3The wastewater treatment equipment for natural rubber production shown in the figure includes a homogenization adjustment tank 1, a pH adjustment tank 2, an electric flocculation device 3, a self-floating tank 4, a DAT-IAT tank 5 and a clear water tank 7 arranged in sequence. The various components are connected by pipes, and a water pump is provided on the pipe. The self-floating tank 4 includes a tank body 41, and the side of the tank body 41 is provided with an inlet pipe 42 and an outlet pipe 43, a slag discharge pipe 44 at the bottom, and a funnel 45 on the upper side. The lower part of the funnel 45 is provided with a slag discharge pipe 46, and the upper part of the funnel 45 is provided with a scraper 48, which is driven by a motor 47.

[0017] The pH adjustment tank 2 is provided with a sodium hydroxide dosing device 9 and a flocculant dosing device 10 , and a PAM dosing device 11 is provided on the pipeline between the electric flocculation equipment 3 and the self-floating tank 4 .

[0018] It also includes a sludge recovery tank 6, which is connected to the sludge discharge pipe 44 and the sludge discharge pipe 46 of the self-floating tank 4 and the sludge discharge pipe of the DAT-IAT tank 5 respectively.

[0019] Except for the self-floating tank 4, all other components are prior art.

[0020] Working principle and process: After passing through an artificial screen to remove large particles of impurities, natural rubber wastewater flows by gravity into homogenization regulating tank 1. During this process, sediment and large-sized rubber particles are precipitated, reducing the subsequent dosage and lowering operating costs. The wastewater from homogenization regulating tank 1 is pumped into pH regulating tank 2, where sodium hydroxide and flocculants are added to adjust the pH value of the wastewater and further precipitate particulate matter. The wastewater from pH regulating tank 2 is pumped into electric flocculation equipment 3, which undergoes various physical and chemical reactions such as oxidation, reduction, neutralization, coagulation, and flotation separation on the pollutants in the wastewater. The wastewater continues to flow into the self-floating tank 4, where PAM (polyacrylamide) is added. The wastewater particles in the self-floating tank 4 further condense and settle, and the scum floats up and is scraped into the funnel 45 by the scraper 48. It is then discharged into the sludge recovery tank 6 through the scum discharge pipe 46. The wastewater is pumped into the DAT-IAT tank 5, where air is supplied to its aeration device by the fan room 8. Water enters the DAT tank and is continuously aerated. The wastewater then enters the IAT tank for aeration, sedimentation, and decanting. The remaining sludge is discharged into the sludge recovery tank 6. Finally, the wastewater enters the clear water tank 7 for reuse.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wastewater treatment equipment for natural rubber production, characterized in that: The invention comprises a homogenizing regulating tank (1), a pH regulating tank (2), an electric flocculation device (3), a self-floating tank (4), a DAT-IAT tank (5) and a clear water tank (7) which are arranged in sequence. The self-floating tank (4) comprises a tank body (41), a water inlet pipe (42) and a water outlet pipe (43) are provided on the side of the tank body (41), a slag discharge pipe (44) is provided on the bottom, and a funnel (45) is provided on the upper side. A slag discharge pipe (46) is provided at the lower part of the funnel (45). A scraper (48) is provided above the funnel (45), and the scraper is driven by a motor (47).

2. The wastewater treatment equipment according to claim 1, characterized in that The pH regulating tank (2) is provided with a sodium hydroxide dosing device (9) and a flocculant dosing device (10), and a PAM dosing device (11) is provided between the electric flocculation equipment (3) and the self-floating tank (4).

3. The wastewater treatment equipment according to claim 1, characterized in that It also includes a sludge recovery tank (6), which is respectively connected to the sludge discharge pipe (44) and the sludge discharge pipe (46) of the self-floating tank (4) and the sludge discharge pipe of the DAT-IAT tank (5).

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