Waste sludge dewatering method of water-based material

[0016] After the applicant's research analysis, the prior art used dewatering machine type has a plate-like, departing, style, belt and overprinkable, and in addition to the selection of sludge moisture requirements, investment In terms of cost and operation, it is necessary to specifically consider the characteristics of sludge. In the contained sludge, a small amount of mercury vapor can volatilize at room temperature, and the prior art dewatering device is scheduled, and Belt semi-open type, sealing conditions, poor working environment, easy to cause high mercury concentration, causing secondary pollution, if management is not good, will cause mud spills, qi in space Over the standard, will hazard personnel and the environment. According to these problems, the applicant proposes a method of dehydrating a water-based material, and the specific scheme is as follows.

[0017] The aquiferous form in solid waste sludge can be divided into two categories of water and non-comrades, and non-tap water is also divided into gap water, surface adsorption water and chemical binding water.

[0018] Among them (1) free water: free water surrounded by sludge particles, there is no interaction between the sludge particles, which varies greatly in different kinds of sludge, but usually accounts for total moisture. The proportion is large, generally 65% ​​-85% of the sludge moisture.

[0019] (2) Gap water: there is a sludge particle gap, which is released when the particles are broken. This part of water can generally be removed by concentration. A 15% -25% of the sludge moisture content.

[0020] (3) Surface adsorption water: adsorbed by physical action or ammonia bonding or attached to the surface of the sludge floc, form a layer of water film on the surface of the sludge particles, usually accounting for 7% of non-free water.

[0021] (4) Chemical combination water: Also known as internal water, existing in the internal or microbial cells of sludge particles, typically mechanical treatment is difficult to dehydrate this part of water, but this part of the internal water can be removed by other sludge pretreatment technology The flow of mud particles is exiting such as ultrasonic barrel. The content is about 3% of non-free water.

[0022] For common solid sludge dehydration mainly includes mechanical dehydration and gravity dehydration, existing methods include pressurized filtration, intradermal dehydration and vacuum filtration.

[0023] Waste sludge dehydration method for aqueous material, including the following steps:

[0024] Step 1, put the material into the dose, the operator is added to the dose, and then the drug is chemically treated, and the chemical waste sludge flows into the sludge massager;

[0025] Step 2, the waste sludge is treated by a sludge vessel, through a mud pump, and chemically treated waste sludge enters dewatering treatment;

[0026] Step 3, when the waste sludge is entered into the dehydration, then the rotating motor is activated, and the rotating hub rotation is rotated to the waste sludge into the waste sludge, and the liquid in the contamination of the pollution sludge in the rotary extrusion is sinked into the liquid. In the liquid tank, then the liquid in the liquid pool is then flowed into the liquid phase, and the other solid waste sludge is entered into the solid phase outlet;

[0027] Step 4, sewage in the sewage irrigation for sewage treatment, sewage filling mercury steam for condensed treatment, mercury steam is inserted from the air, then the nozzle of the cooling water is turned on, and the mercury steam is condensed into a liquid state, and the liquid substance enters recovery Tank, gas phase enters the coagulator;

[0028] Step 5, then the condenser is treated, the condenser purifies the exhaust gas, and the cleaned exhaust gas enters the mercury adsorption column, remove the residual mercury harmful substance and smell in the exhaust gas, and the work is over.

[0029] Preferably, the material selected in the step 1 is conveyed in the discrete form to the dose.

[0030] Preferably, the conveying method is a batch.

[0031] Preferably, in the step 4, the outlet of the coagulator is connected to the collector.

[0032] Preferably, in the step 1, the drug added in the dosing is stopped stirring for a dilute sulfuric acid stirring for 2 h, and enters the sludge stripper.