Sewage biochemical treatment system

Abstract

The utility model relates to a sewage biochemical treatment system, which comprises a neutralizing tank, an adjusting tank, a filter press and an adjusting tank which are sequentially communicated according to the flowing direction of liquid, and the liquid inlet end of the neutralizing tank is communicated with a liquid inlet pipe for conveying electrostatic acid. Alkali and water are added into the neutralization tank through the feeding pipeline to react with electrostatic acid to generate mixed substances such as sodium sulfate and sodium sulfonate, and the decolorizing agent tank conveys a decolorizing agent into the adjusting tank, so that the reacted liquid can be neutralized, flocculated and decolorized in the adjusting tank; flocculate obtained after reaction in the adjusting tank is subjected to settling separation through a filter press, and the separated mixed clear liquid of sodium sulfonate and sodium sulfate enters the adjusting tank, so that the purpose of adding a carbon source liquid in sewage biochemical treatment is achieved, production waste liquid, namely electrostatic acid, can be turned into wealth, and the purpose of recycling is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage biochemical treatment system. Background Art

[0002] Anionic surfactants are the main types of surfactants in my country. The main products include alkylbenzene sulfonates, fatty alcohol sulfates, fatty alcohol ether sulfates, fatty acid methyl ester sulfonates, etc. The typical production process is sulfonation and sulfation with sulfur trioxide. At present, the core equipment for sulfonation and sulfation is the falling film sulfonation reactor. During the production process, its tail gas treatment device - electrostatic precipitator recovers a mixture of sulfur trioxide and liquid materials, namely electrostatic acid, the main components of which include: raw materials, sulfonation products, oversulfonated products and sulfuric acid, and the main components contain carbon sources;

[0003] In the sewage biochemical treatment process, a large number of bacteria are required to reproduce. Through the metabolism of microorganisms, the organic matter in the sewage is decomposed into harmless substances to achieve the purpose of purifying water quality. The reproduction of bacteria requires the addition of a carbon source to the sewage to provide organic matter. Therefore, a sewage biochemical treatment system is proposed to recycle the carbon source in the electrostatic acid to achieve the purpose of use. Utility Model Content

[0004] The utility model aims at the deficiencies of the prior art and provides a sewage biochemical treatment system. The specific technical scheme is as follows:

[0005] A sewage biochemical treatment system, comprising a neutralization tank, an adjustment tank, a filter press and an adjusting tank which are sequentially connected according to the direction of liquid flow, wherein the liquid inlet end of the neutralization tank is connected with a liquid inlet pipe for conveying electrostatic acid, the liquid outlet end of the neutralization tank is connected with the liquid inlet end of the adjustment tank, the liquid inlet end of the adjustment tank is also connected with a decolorant tank, the liquid outlet end of the adjustment tank is connected with the feed inlet of the filter press, and the liquid outlet of the filter press is connected with the liquid inlet of the adjusting tank;

[0006] The electrostatic acid is transported into the neutralization tank for neutralization reaction, and the liquid after the reaction is then transported to the adjustment tank for neutralization, flocculation and decolorization reaction. The flocculants after the reaction are subjected to sedimentation separation by the filter press, and the separated liquid enters the regulating tank.

[0007] As an improvement of the above technical solution, a liquid outlet pipe is provided at the bottom of the neutralization tank, a liquid storage cylinder is provided at the bottom of the liquid outlet pipe, a circulation pipe is provided between the liquid storage cylinder and the neutralization tank, a pump body is fixedly installed at the liquid inlet end of the circulation pipe, and the liquid outlet end of the liquid storage cylinder is connected to the liquid inlet end of the adjustment tank.

[0008] As an improvement of the above technical solution, a heat exchange tube is wound around the surface of the circulation tube, and a coolant is passed through the heat exchange tube.

[0009] As an improvement of the above technical solution, a stirring member is provided in the neutralization tank, and the stirring member includes a stirring shaft rotatably inserted into the neutralization tank, a motor is fixedly installed on the top of the stirring shaft, and a plurality of stirring rods are fixedly provided on the surface of the stirring shaft and located in the neutralization tank.

[0010] As an improvement of the above technical solution, a sampling tube is fixedly provided on the top of one side of the liquid storage cylinder.

[0011] Beneficial effects of the utility model:

[0012] The electrostatic acid is transported to the neutralization tank through the liquid inlet pipe, and alkali and water are added to the neutralization tank through the feed pipeline to react with the electrostatic acid to generate mixed substances such as sodium sulfate and sodium sulfonate. The decolorant tank transports the decolorant to the adjustment tank, so that the reacted liquid can be neutralized, flocculated and decolorized in the adjustment tank. The flocculent after the reaction in the adjustment tank is subjected to sedimentation separation by a filter press, and the mixed clear liquid of the separated sodium sulfonate and sodium sulfate enters the regulating tank to achieve the purpose of adding carbon source liquid to the biochemical treatment of sewage, and the production waste liquid, i.e., the electrostatic acid, can be turned into treasure to achieve the purpose of recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is the main view of the overall structure of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the neutralization tank of the utility model.

[0015] Figure numerals: 10, neutralization tank; 11, liquid inlet pipe; 12, circulation pipe; 13, heat exchange tube; 14, liquid storage cylinder; 15, stirring shaft; 16, motor; 20, adjustment tank; 30, filter press; 40, regulating tank; 50, decolorant tank. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0017] A sewage biochemical treatment system is provided with a neutralization tank 10, an adjustment tank 20, a filter press 30 and a regulating tank 40 which are connected in sequence according to the liquid flow direction. The liquid inlet end of the neutralization tank 10 is connected with a liquid inlet pipe 11 for conveying electrostatic acid. The liquid outlet end of the neutralization tank 10 is connected with the liquid inlet end of the adjustment tank 20. The liquid inlet end of the adjustment tank 20 is also connected with a decolorant tank 50. The liquid outlet end of the adjustment tank 20 is connected with the feed port of the filter press 30. The liquid outlet of the filter press 30 is connected with the liquid inlet of the regulating tank 40.

[0018] The electrostatic acid is transported into the neutralization tank 10 for neutralization reaction, and the liquid after the reaction is then transported to the adjustment tank 20 for neutralization, flocculation and decolorization reaction. The flocculants after the reaction are subjected to sedimentation separation by the filter press 30, and the separated liquid enters the regulating tank 40.

[0019] Carbon source is a nutrient required for the growth and reproduction of microorganisms. It can provide the carbon elements required by microorganisms and promote the growth and reproduction of microorganisms. In traditional sewage treatment processes, after adding carbon source to sewage, microorganisms will undergo biological reactions, using organic matter for absorption and growth, thereby degrading harmful substances. In the bioreactor, the addition of carbon source can improve the activity and growth rate of microorganisms and accelerate the removal rate of harmful substances. Therefore, the production waste liquid containing carbon source, i.e., electrostatic acid, is transported to the neutralization tank 10 through the liquid inlet pipe 11, and alkali and water are added to the neutralization tank 10 through the feed pipeline to react with the electrostatic acid to generate mixed substances such as sodium sulfate and sodium sulfonate. The decolorant tank 50 transports the decolorant to the adjustment tank 20, and alkali and water are added to the adjustment tank so that the reacted liquid can be neutralized, flocculated and decolorized in the adjustment tank 20, and the pH value of the sewage can be further increased, because too low a pH value will have an adverse effect on the growth and metabolism of microorganisms and reduce the ability of microorganisms to degrade pollutants. The flocculants after the reaction in the adjustment tank 20 are subjected to sedimentation separation by the filter press 30, and the separated mixed clear liquid of sodium sulfonate and sodium sulfate enters the regulating tank 40 to achieve the purpose of adding carbon source liquid to the biochemical treatment of sewage, and the production waste liquid, i.e., electrostatic acid, can be turned into treasure.

[0020] In order to fully mix the liquid in the neutralization tank 10, a liquid outlet pipe is provided at the bottom of the neutralization tank 10, and a liquid storage cylinder 14 is provided at the bottom of the liquid outlet pipe. A circulation pipe 12 is provided between the liquid storage cylinder 14 and the neutralization tank 10, and a pump body is fixedly installed at the liquid inlet end of the circulation pipe 12. The liquid outlet end of the liquid storage cylinder 14 is connected to the liquid inlet end of the adjustment tank 20. Specifically, the pump body is started, and the liquid in the neutralization tank 10 enters the liquid storage cylinder 14 through the liquid outlet pipe. The circulation pipe 12 re-draws the liquid in the liquid storage cylinder 14 into the neutralization tank 10 through the pump body, so that the liquid in the neutralization tank 10 circulates, which can avoid the sedimentation of the liquid at the bottom of the neutralization tank 10, resulting in insufficient mixing. Among them, a solenoid valve is installed in the liquid outlet pipe.

[0021] In order to prevent the solution at the center of the neutralization tank 10 from not being effectively cooled, a heat exchange tube 13 is wound around the surface of the circulation tube 12. Cooling liquid is passed through the heat exchange tube 13 to exchange heat with the liquid in the neutralization tank 10 during the circulation process to reduce its temperature, thereby achieving uniform heat exchange and efficient cooling. The heat generated during the reaction process can be processed in time, effectively avoiding the occurrence of safety accidents.

[0022] In order to further improve the mixing effect, a stirring member is provided in the neutralization tank 10, and the stirring member includes a stirring shaft 15 rotatably inserted into the neutralization tank 10, and a motor 16 is fixedly installed on the top of the stirring shaft 15. A plurality of stirring rods are fixedly provided on the surface of the stirring shaft 15 and located in the neutralization tank 10. Specifically, the motor 16 is started, and the motor 16 drives the stirring shaft 15 to rotate, and the stirring shaft 15 drives the stirring rods to continuously stir in the neutralization tank 10 to improve the mixing effect.

[0023] In order to facilitate the detection of the pH value of the liquid, a sampling tube is fixedly provided on the top of one side of the liquid storage cylinder 14. The discharge pipe is opened or closed by the solenoid valve on the discharge pipe. When the neutralization tank 10 has been running for a period of time, the discharge pipe is closed by the solenoid valve, and the liquid inside the liquid storage cylinder 14 is extracted through the sampling tube for detection.

[0024] 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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. The sewage biochemical treatment system is characterized by: A neutralization tank (10), an adjustment tank (20), a filter press (30) and a regulating tank (40) are sequentially connected and arranged according to the direction of liquid flow; the liquid inlet end of the neutralization tank (10) is connected and arranged with a liquid inlet pipe (11) for conveying electrostatic acid; the liquid outlet end of the neutralization tank (10) is connected to the liquid inlet end of the adjustment tank (20); the liquid inlet end of the adjustment tank (20) is also connected and arranged with a decolorant tank (50); the liquid outlet end of the adjustment tank (20) is connected to the feed inlet of the filter press (30); and the liquid outlet of the filter press (30) is connected to the liquid inlet of the regulating tank (40).

2. The sewage biochemical treatment system according to claim 1, characterized in that: The bottom of the neutralization tank (10) is connected to a liquid outlet pipe, and the bottom of the liquid outlet pipe is connected to a liquid storage cylinder (14). A circulation pipe (12) is provided between the liquid storage cylinder (14) and the neutralization tank (10). A pump body is fixedly mounted on the liquid inlet end of the circulation pipe (12). The liquid outlet end of the liquid storage cylinder (14) is connected to the liquid inlet end of the adjustment tank (20).

3. The sewage biochemical treatment system according to claim 2, characterized in that: A heat exchange tube (13) is wound around the surface of the circulation tube (12), and a coolant is passed through the heat exchange tube (13).

4. The sewage biochemical treatment system according to claim 1, characterized in that: A stirring member is arranged in the neutralization tank (10), and the stirring member comprises a stirring shaft (15) rotatably plugged into the neutralization tank (10), a motor (16) is fixedly mounted on the top of the stirring shaft (15), and a plurality of stirring rods are fixedly arranged on the surface of the stirring shaft (15) and located in the neutralization tank (10).

5. The sewage biochemical treatment system according to claim 2, characterized in that: A sampling tube is fixedly arranged on the top of one side of the liquid storage cylinder (14).

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