As the “last mile” of sludge treatment, how to better treat sludge has become a difficult problem for sewage treatment plants and local governments.
Sludge generally refers to the product of water purification in sewage treatment plants. As the product of sewage treatment, it mainly comes from the primary sedimentation tank, secondary sedimentation tank and other technological links. The sewage becomes clear after entering the sewage treatment plant, but the pollutants in the water are not eliminated completely, they are only concentrated and concentrated in the colloidal sludge deposited. It is understood that each cubic meter of sewage after treatment sludge production (according to the moisture content of 80%) is generally about 5 tons -10 tons, the specific output depends on the inlet water quality, sewage and sludge treatment process and other factors.
How much sludge does our country produce every year? Sludge as a byproduct of sewage treatment, its production is also increasing. Calculated with 80% water content, the total annual sludge production in China is expected to exceed 60 million tons by 2020.In addition, according to public information, about 30-50% of COD, 30%-45% of nitrogen and 90% of phosphorus in sewage were transferred to sludge. From the perspective of energy saving and emission reduction, if sludge is not treated in time, sewage treatment is equivalent to only one third of the process.
At present, China’s urban sewage treatment plants have basically achieved the initial reduction of sludge, but not the stabilization of sludge treatment. In the early stage, due to the absence of strict sludge discharge supervision, sewage treatment system and sludge treatment system were generally separated, and sludge treatment system was simplified or even ignored as far as possible. In sludge treatment industry, there are many treatment processes, different sludge often have different treatment methods. Traditional sludge disposal generally adopts sanitary landfill, incineration power generation, soil utilization and other methods.
Jet mud mixer also known as mud mixer, not only simple structure, but also strong feasibility. KOSUN’s JM series jet mud mixer is mainly used to prepare or increase the total amount of drilling fluid, change drilling fluid density, viscosity, water loss and other characteristics of the special equipment. The mud mixing device can meet the requirements of weight and preparation of drilling fluid for the solid control system of drilling from 1500 meters to 9000 meters. KOSUN JM series jet mixing device and shear pump matching effect is more prominent.
Main structure of KOSUN JM series jet mud mixer:
The jet mud mixer consists of a sand pump and a jet mixing funnel connected by manifold valve on a base. Safe and reliable performance, convenient transportation. The weighted funnel and the sand pump can be assembled or mounted separately. The weighted funnel and the sand pump can be connected by manifold valve.
At the same time, we can also make double jet mixing device and double jet mixing device according to customer’s requirements. The mixer consists of two sand pumps and two jet funnels, which can meet the requirements of large mixing amount.
The translational elliptical vibrating screen is the fourth generation of new mud vibrating screen. Before the mud vibrating screen mainly choose linear vibrating screen, but now more and more drilling companies choose translational elliptical vibrating screen.
With the development of drilling technology, drilling depth is deeper and deeper, and mud requirements are more and more strict. Some complex geological conditions under the ordinary mud shaker can no longer meet the requirements of use. Moreover, the performance of the ordinary drilling vibrating screen is not very stable, and the effect of drilling vibrating screen treatment can not be adapted according to the drilling geology, often there will be some run-slurry or “horseshoe effect”. The appearance of the translational elliptical vibrating screen has solved these problems.
Advantages of translational elliptical vibrating screen:
1. Treatment capacity is
increased by 25%-30% compared with linear vibrating screen;
2. Can adapt to a variety of
geological conditions drilling mud recovery and purification;
Submersible slurry pump is vertical single-suction cantilever centrifugal pump, professional bearing seal, separated from the immersion of sand and gravel, effectively ensure the service life of the bearing, impeller for the semi-open impeller, impeller suction side extension of the impeller with a stirring impeller. There is no bearing between the fixed disc and impeller and pump shell, no seal and support, and no maintenance. It can transport medium with larger concentration of solid particles. Large suction capacity, wear-resistant alloy is used for flow parts. The liquid depth of submersible slurry pump is ≤2500mm.
Features and advantages of KOSUN submersible slurry pump:
1. The pump shaft under the
liquid has sufficient stiffness. There is no bearing between the pump body, and
the shaft seal is not used to transport the medium containing solid particles
of greater concentration.
2. The length of the pump under the insertion liquid is between 800 and 2500mm, and suction pipe can be equipped if necessary;