本工程采用DCS自动控制系统，大大降低劳动强度、减少人工，从而节约运行

This project adopts DCS automatic control system, which greatly reduces labor intensity and labor, thereby saving operation and management costs. In order to delay the fouling of the membrane, the membrane biological reaction system adopts a constant liquid level water outlet method, and a regulating valve is installed at the inlet of the water production pump. An orifice flowmeter is installed on the water outlet pipeline, and the operating frequency of the membrane bioreaction water production pump is automatically controlled by comparing the set flow with the detected flow, so as to ensure the constant liquid level of the membrane system. <br>A pressure transmitter is installed at the inlet of the water production pump. The pressure transmitter is used to monitor the transmembrane pressure difference. When the transmembrane pressure difference reaches the set value (25kPa), it will alarm and automatically stop the pump, prompting the operator to manually start the restorative backwash program , To ensure that the membrane system is not damaged. There is an air purge system at the bottom of the membrane module, which is connected to a purge fan and is controlled by the DCS program. It is continuous purge during normal operation. When the system enters the online chemical cleaning program, the purge system is paused, and when the cleaning ends, it automatically starts running. The membrane bioreaction water production pump runs intermittently and is configured by DCS to realize automatic control operation. The production water pump is interlocked with the purge fan. When the fan stops working, the production water pump cannot be started. <br>The membrane tank is equipped with a static pressure level gauge. When the liquid level of the membrane tank is lower than the protection level of the membrane module, an alarm will be issued and the pump will be locked in parallel. When the liquid level of the membrane tank reaches the set high level, an alarm will be issued to ensure the liquid level of the membrane tank. Bit stable. Flow meters are installed on the return sludge and surplus sludge pipelines to monitor the return sludge volume and residual sludge discharge volume in real time.

The project adopts DCS automatic control system, which greatly reduces labor intensity and labor, thus saving operating and management costs. In order to delay the fouling of the membrane, the membrane bioreactive system adopts the constant liquid level water outlet method, and the water production pump inlet is set up to regulate the valve. The hole plate flow meter is set up on the outlet line, and by setting the flow rate and the detection flow, the running frequency of the membrane bioreaction production pump is automatically controlled, so as to ensure the constant fluid level of the membrane system.<br>The water production pump inlet is set up pressure transmitter, pressure transmitter is used to monitor the cross-film pressure difference, when the cross-film pressure difference reaches the set value (25kPa) after the alarm and automatically stop the pump, prompting the operator to manually start the restorative anti-washing procedure to ensure that the membrane system is not damaged. The bottom of the membrane assembly is equipped with an air-sweeping system, which is connected to the blow-off fan and is controlled by the DCS procedure. When working normally, continuous sweep, when the system enters the in-line chemical cleaning program, the blow-sweeping system is suspended and automatically starts running at the end of cleaning. Membrane bioreactive water production pump intermittent operation, by DCS configuration, to achieve automatic control operation. The water pump is interlocked with the blow-off blower, and the pump cannot be started when the fan stops working.<br>Membrane pool set static pressure level meter, when the membrane pool level is lower than the membrane component protection level, alarm and interlock stop pump, when the membrane pool level reaches a set high level alarm, to ensure that the membrane pool level is stable. Flow meters are set up on reflux sludge and residual sludge pipes to monitor the amount of reflux sludge and residual sludge emissions in real time.

DCS automatic control system is adopted in this project, which greatly reduces labor intensity and labor, thus saving operation and management costs. In order to delay the fouling and plugging of membrane, the membrane bioreactor system adopts the constant liquid level effluent mode, and the inlet of the product water pump is equipped with a regulating valve. An orifice flowmeter is set in the outlet pipe. By comparing the set flow rate with the detected flow rate, the operation frequency of the membrane bioreactor water pump is automatically controlled, so as to ensure the constant liquid level of the membrane system.<br>A pressure transmitter is set at the inlet of the product water pump. The pressure transmitter is used to monitor the transmembrane pressure difference. When the transmembrane pressure difference reaches the set value (25kpa), it will give an alarm and stop the pump automatically, prompting the operator to start the recovery backwashing program manually, so as to ensure that the membrane system will not be damaged. An air purge system is set at the bottom of the membrane module, which is connected with the purge fan and controlled by DCs program. When the system enters the on-line chemical cleaning procedure, the purging system will stop and start to run automatically after cleaning. The water pump of membrane bioreactor runs intermittently and automatically controlled by DCS configuration. The product water pump is interlocked with the purge fan. When the fan stops working, the product water pump cannot be started.<br>The static pressure liquid level meter is set in the membrane tank. When the liquid level of the membrane tank is lower than the protection liquid level of the membrane module, the alarm is given and the pump is stopped by interlocking. When the liquid level of the membrane tank reaches the set high level, the alarm is given to ensure the stability of the liquid level of the membrane tank. Flowmeters are set on the return sludge and excess sludge pipes to monitor the amount of return sludge and excess sludge discharge in real time.<br>