Based on the Y series motor and SBR wastewater treatment control system design based on PLC devices - Industrial control

in this paper the principles and process of the SBR wastewater treatment technology, on the basis of this paper introduces the application of PLC controller design of the whole control system, and better implement the technology requirements and control requirement of the SBR wastewater treatment, obtained satisfactory results.

2. Process description

SBR wastewater treatment technology is a kind of highly efficient wastewater reuse treatment technology. This design adopts the technology of campus life water for processing, after processing, the water can be used to irrigate green, flowers and trees, flush toilets and vehicles, etc. , so as to achieve the purpose of saving the water resource.

after separation tank to remove grease wastewater by the grating into the pool depth section, the lift pump into the hydrolysis acidification pool hydrolysis into SBR reaction pool. Sewage before entering the reaction pool, the pool is in idle state, the pool with activated sludge settling down. When water is filled for aeration operation, the pool can effectively regulate the wastewater quality. After aeration, stop the aeration action, make the mixture in a stationary state, spate separation, settling time is 6 - 8 h, precipitation effect is good. After precipitation reaction in the pool of the supernatant by pump to clear water reserviors, activated sludge, as the next operating period of strains. When excessive activated sludge reaction pool, discharge of sludge into the sludge thickener and sludge after enrichment regular dislodged, dry processing. Concentrate on the pool supernatant reflux to the waste water entrance.

SBR wastewater treatment technology is a kind of highly efficient wastewater reuse treatment technology. This design adopts the sometimes instrument technology for processing of campus life water, after processing, the water can be used to irrigate green, flowers and trees, flush toilets and vehicles, etc. , so as to achieve the purpose of saving the water resource.

when designing SBR wastewater treatment system, fully considering the characteristics of campus living area is relatively small in real life, in the design of equipment is small in size, to achieve the purpose of stable performance, engineering investment. Due to environment temperature in the process of wastewater treatment have the effects on flora metabolism directly affecting the effects of wastewater treatment, so the design of buried brick structure of the tank is used to reduce the effects of temperature on the treatment effect. At the same time because of SBR wastewater treatment technology has the change of process parameters, selection of the hardware design and the characteristics of complicated equipment debugging, therefore in the processing system adopts advanced PLC controller control technology as a control core of the system, and to improve the efficiency of SBR wastewater treatment, convenient operation and use.

SBR wastewater treatment system by wastewater treatment ponds, clear water reserviors, water tank, roots blower and water pump, electric control box, electric valves and solenoid valves and other parts. In wastewater treatment ponds, clear water reserviors, water tank, respectively, set the liquid level switch, used to detect pool and the water level in water tank.

the first phase of the sewage treatment, when the water in the pool water level in the low water level or anhydrous state ( Also known as the stay, water state) When the electric valve will automatically open into the water. When the sewage pool into ruling long sewage water ( High water level) At the right time. Automatically shut down electric method, sewage pool sewage is slightly and anaerobic condition.

in the second phase of the sewage treatment, using the macromolecular aeration method of pollutants can be solution, but there is no water decolorization, deodorization and PH balance flora and the pollutants are efficient decontamination, namely the aerobic process. The aerobic usually need to 2 - time 3h（ Aeration time) 。 In exposure on trachea way designed installed the emptying of the electromagnetic valve, when electric valve automatically shut down, emptying solenoid valve open, roots blower, delay start ( No-load) Electromagnetic valve closed, emptying, sewage pool aeration. When after the detonation gas processing, roots blower emptying electromagnetic valve to open again, downtime ( No-load) Solenoid valve, emptying delay shut down. Aeration fan must be under the condition of no load starting and stopping, can protect the motor and fan. General through 0. 5 the water quality of precipitation, PLC controller issued to start the water ( 1 # pump) Instruction, after precipitation of water pump into the clear water reserviors. When the water level in the clear water reserviors rise to normal level ( High water level) 1 #, fresh water pump automatically stops running. Then 2 # fresh water pump to start to lu water tank water pump, when reach high water tank ( The normal liquid level) 2 #, fresh water pump automatically stops running, this is the water in the water treatment process to finish.

as mentioned above, in the water tank water level drop to the low water level ( The normal liquid level) , 2 # tank in fresh water pump and automatically start to pump water. When the water fell to a low level of sewage pool ( The normal liquid level) , electric valve will automatically open to sewage pool into the water. Such a cycle.

because of SBR wastewater treatment technology for sewage water quality is different, choose different biological flora at different technological requirements, and requirements of the electrical control system should have the function of the parameters can be modified, to meet the requirements of wastewater treatment. SBR wastewater treatment system diagram as shown in figure 1.

3, selects the power equipment requirements

to SBR wastewater treatment system used in the power equipment ( Water pump, roots blower, electric valve) , adopts three-phase ac asynchronous motor. Motor shall be equipped with Y series waterproof and moistureproof, solenoid valve, 220VAC） Choose should also conform to the requirements of the waterproof.

( 4) Electric valve: the valve body D97A1X5 - 10 zb - LQ20-125 - mm electric device l, 380 v / 60 w ( Three phase) , 200 n · m torque, rotating speed 1 r/min.

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