April 3rd morning, the boiler workshop on the sewage treatment sand filter for maintenance.

Sand filter is an important part of wastewater treatment system, and it is a structure to separate the suspended matter in the water body. And settling pond slurry to achieve separation, the sludge part returns to the system maintain circulation system, a part into the sludge pool of mud cake Sinotrans, the effluent will enter the sand filter. However since the recent period of time, sand filter of high COD, sewage treatment design theory content of 400m3 / h, the design of the water won't, and often overflow, the last procedure, the clear water tank effluent had little difference, and even qing pool water has become turbid. The duties of the position of the sewage treatment, not only the enterprise's sewage after biochemical treatment, to achieve the national level two emission standards. Now due to the shortage of water resources, in order to maintain the company's sustainable development and reduce the waste of water resources, reduce production cost, improve the enterprise economic benefit and social benefit, will be required to achieve discharge standards of water again after further treatment to our enterprise replenishment requirements and reuse, so the maintenance of the sand filter without delay.

Aimed at this situation, boiler workshop leadership and production environmental protection department personnel attaches great importance to the analysis of sand filter water effect is not ideal may exist in a variety of reasons, such as sand filter into the part of the sedimentation tank sludge; sand filter in the filter cap, filter plate is damaged; sand filter sand leakage to the clean water tank, resulting in sand filter filtration effect is not ideal, the water tank effluent turbidity.

According to the analysis of the causes of failure, in the boiler workshop, machine company, building science and foreign assistance personnel overtime, night fight together under, on the afternoon of April 4, sand filter maintenance completed, input system, to resume normal operation.