What are the mud treatment equipment for washing the battlefield? How much will it cost?

A large amount of mud wastewater produced by sand washing in the sand washing field makes people complain, and local environmental protection departments pay more and more attention to the zero discharge index of sewage from industrial and mining enterprises. So how to deal with this high-concentration mud and what kind of dewatering equipment are available in the market are what most industrial and mining sand owners want to find out. At present, the equipment for treating slurry wastewater on the market includes: belt filter press, plate-and-frame filter press, box filter press, centrifugal sludge dehydrator, etc. However, not all dewatering equipment is suitable for treating sand washing mud water in sand yard. This kind of mud has high concentration and heavy specific gravity, and the traditional method of shoveling and naturally drying is extremely inefficient and difficult to treat. For example, due to the structure of belt and box filter press, mud-water separation must rely on filter media (filter plate, filter cloth). However, the mesh of filter media on the market at present can not reach the fineness of mud particles, so the dosage of chemicals can only be increased to make up for this deficiency, which greatly increases the operating cost of the equipment without coagulation.

A, battlefield mud treatment equipment dosing costs:

The working principle of sand washing sewage treatment equipment: according to the different specific gravity of materials, after sewage enters the centrifuge, solid particles are thrown to the drum wall through the high-speed rotation of the drum, and a mud wall is continuously formed at the mud outlet through the forward extrusion and mud scraping of the screw feeder, so that water flows back to the water outlet, and sludge is pushed to the mud outlet and pushed out. The whole machine does not have any filter screen and filter cloth, and only relies on centrifugal force to separate mud and water, so the requirement for dosage is extremely low. A 350 centrifuge works for 8 hours a day, and the dosage is one to three kilograms. Depending on the sludge, centrifuges can even achieve good treatment results for many materials without adding chemicals. Such as pickling graphite, concentrate dehydration, acetylene gas slag, mine tailings and other materials with coarse particles that are easy to precipitate, do not need flocculants. This greatly reduces the cost of administration and treatment. However, due to the large mesh of the filter surface of the belt filter, the flocculation requirement of mud explosion is high during dehydration, which leads to a great increase in dosing cost. A certain amount of flocculant needs to be added to the concentration tank when it is treated by plate and frame machine.

Second, the long-term use cost of battlefield mud treatment equipment:

When using a centrifuge, the power consumption is three to four kilowatts higher than that of a belt conveyor, and if you work eight hours a day, it will cost 30 yuan more every day. However, the centrifuge does not need water washing during the whole dehydration process. Belt conveyors are different. One-meter belt conveyor needs 60-70 cubic meters of water every day to backwash the filter belt. Backwashing water is refluxed and reprocessed, and the cost per cubic meter of water 2.5 yuan is at least increased by 150 yuan (the consumption is larger than that of centrifuges). If the cost of backwashing with tap water is higher, it will save 120 yuan every day and at least 40,000 yuan a year. The filter cloth should be cleaned after the sludge is treated by the frame-plate machine, otherwise the treatment effect will be affected, and the treatment time will be prolonged, which is time-consuming and laborious. Secondly, the plate-and-frame filter press has pressure requirements for the feed pump, and the sand-making tail mud, including tail mud, contains some fine sand particles to a certain extent, which makes the blade wear cycle of the mortar pump short under high pressure flow, the pump is easy to be damaged and the high-pressure pump is expensive.

Three. Adaptability of battlefield mud treatment equipment to sewage properties;

The mud dehydrator in the sand washing field has strong adaptability to the nature of sewage. No matter what kind of sewage it can treat, some can be treated without chemicals, and some can be treated with a small amount of chemicals. Especially for some oily, fatty and viscous sludge, the other two kinds of equipment are difficult to complete. The filter cloth is easily blocked by sludge, and the sludge particles are too fine, oily and sticky, which is difficult to handle. The separation principle of centrifuge is to separate mud and water by centrifugal force and rapid gravity settlement according to the different specific gravity of mud and water. There is no filter medium, and the whole machine has no filter screen and filter cloth, so it can run stably.

These are all the expenses for using "clean sand washing sewage treatment equipment" in sand washing. I hope you can consider it!