With the rapid growth of oilfield ground engineering construction projects, wastewater treatment system plays a very important role in the ground engineering construction, among which oily sludge treatment system is an indispensable part. 
        Oily sludge is generally composed of water-in-oil emulsion, oil-in-water emulsion and suspended solids. The particles of the oily sludge are fine and flocculated. It has small density difference with water, and has high water content and strong water holding capacity. In addition, due to the use of a large number of chemical agents in the wastewater treatment system, the composition of oily sludge is complex, the emulsification of sludge is serious, and the sludge is difficult to settle. And it is easy to corrupt, produce fetid smell, pollute the air, which causes great harm to the environment. Oily sludge has been included in the oily waste of national hazardous waste catalogue. The national law on promotion of clean production and the law on prevention and control of environmental pollution by solid waste also require harmless and resourceful treatment of oily sludge. Along with the increasingly strict requirements of environmental protection, the harmlessness, reduction and recycling of oily sludge have become an inevitable development trend. And sludge dewatering is the premise of the final disposal of sludge.
        At present, the common mechanical dewatering equipment of oily sludge includes frame filter press, belt filter press, centrifuge dewatering press and multi plate screw press. The frame filter press is easy to clog, and is complicated in maintenance with peculiar smell and noise, which runs intermittently and requires large amount of flushing water. Centrifuge dewatering press has high power consumption and cost. Belt filter press is not suitable for high-oil sludge. Filter cloth is easy to clog and run deviated, which is difficult to continuously operate and is complicated in maintenance with peculiar smell, and also requires larger amount of flushing water. The multi plate screw press integrates the concentration and dehydration of sludge. It can realize the functions of self-cleaning, non-clogging, 
non-odor, small flushing water, low power consumption, simple operation & maintenance, continuous operation. It is the best choice to treat oily sludge.
TENY series of oily sludge and solid-liquid separator
        We specially introduce the TEYN series of oily sludge and solid-liquid separator, which is optimized and improved on the basis of the multi plate screw press. It has the following technical advantages.
1.The filter body adopts lengthened special shaft of oily sludge, which can meet the efficient dehydration of a variety of oily sludge (containing high temperature material of 
100 ℃).
2.The screw shaft adopts surfacing welding super wear-resistant hard alloy material, which is processed into shape through 6 processes.
3.It adopts the multi-point special design of the flocculation dosing tank of oily sludge. And the dosage is low, which overcomes the problems of difficult flocculation and easy settlement of petrochemical sludge.
4.It uses the strengthened driving system, which meets the requirement of larger driving force of oily sludge.
5.The moving rings and fixed rings are made of higher anticorrosive materials, which is suitable for the operation environment of high 
concentration of chloride ion in petrochemical industry.
6.The explosion protection level of the equipment can reach EXDIIBT4, which satisfies the requirement of strict explosion-proof in petrochemical industry.
7.The equipment has a good self-cleaning function, which can avoid the blockage of high-viscosity sludge in conventional equipment.
8.It can be used as a vehicular sludge pretreatment system for multiple oil extraction points, which is convenient for short-term usage in different places.
9.It has small footprint, light weight, simple construction and few system equipment.

The system solution of multi plate screw oily sludge and solid-liquid separation

1.The oily sludge extraction from crude oil
2.Oily sludge of petrochemical wastewater treatment plants
3.Centralized output and processing of oilfield