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Coal washing wastewater treatment system

A treatment system and coal washing wastewater technology, which is applied in mining wastewater treatment, water/sewage treatment, biological water/sewage treatment, etc., can solve the problem that the actual effect of microbial flocculants cannot be fully utilized, the amount of microbial flocculants is large, and the impact of difficult coal washing wastewater and other problems, to achieve the effect of improving the sedimentation performance, reducing the cost of chemicals, and reducing the output

Inactive Publication Date: 2020-08-25
袁中帮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN105712494B discloses a method for coagulation treatment of mining wastewater with microbial flocculants and surfactants, which solves the problems of large amount of microbial flocculants and long flocculation time, but it is limited to the treatment of simulated wastewater. It is difficult to have a significant impact on the colloidal coal washing wastewater in the mining wastewater
Can not give full play to the actual role of microbial flocculants

Method used

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  • Coal washing wastewater treatment system

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A coal washing wastewater treatment system, characterized in that the system includes an excess sludge bin 1, a freezing bin 2, a high-temperature steam wall breaking system 3, a centrifugal device 4, a flocculation treatment tank 5, and a solid-liquid separation device 6; The sludge bin 1 is connected to the freezing bin 2, and the remaining sludge is frozen in the freezing bin 2, and the frozen remaining sludge is transported to the high-temperature steam wall-breaking system 3, and high-temperature steam is introduced into the high-temperature steam wall-breaking system 3 for crushing. The sludge slurry is formed by the wall treatment, and the sludge slurry after the broken wall is transported to the centrifugal device 4, and the centrifuged supernatant is used as the excess sludge flocculant, and is transported to the excess sludge flocculant tank 7 for storage; The flocculation treatment tank 5 is provided with an excess sludge flocculant tank 7 and a lime suspensio...

Embodiment 2

[0042] Mine water quality and coal washing wastewater water quality are with embodiment 1;

[0043] Experimental condition is with embodiment 1;

[0044] The solid waste generated by the solid-liquid separation, the solid waste, after dehydration and drying, is added with caustic soda according to the mass ratio of 10:1, calcined and ground to 0.05-0.2mm, and the calcined product is added with hydrochloric acid solution and / or acid mine wastewater, adjust the pH to 3-5, stir under heating conditions for 60min, cool down to room temperature after the reaction is over, and remove the waste residue to obtain a solution containing polyaluminum iron calcium silicate; the polyaluminum iron calcium silicate Mixing the excess sludge flocculant with the excess sludge flocculant in a volume ratio of 5:30 to replace the excess sludge flocculant in step (4);

[0045] Effluent pH value: 8.07, SS: 89g / L, COD: 56mg / L.

Embodiment 3

[0047] Mine water quality and coal washing wastewater water quality are with embodiment 1;

[0048] Experimental condition is with embodiment 1;

[0049]The solid waste generated by the solid-liquid separation is dehydrated and dried, then calcined, and then the calcined residue is ball-milled to prepare a porous material with a particle size of 1-5mm, and the porous material is also added in the step 4 material, the calcination is carried out in a calcination furnace, the sintering temperature in the calcination furnace is 1250-1800°C, and the dosage of the porous material is 5-9g / L;

[0050] Effluent pH value: 7.93, SS: 98g / L, COD: 69mg / L.

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Abstract

The invention discloses a coal washing wastewater treatment system. The system comprises a residual sludge bin, a freezing bin, a high-temperature steam wall breaking system, a centrifugal device, a flocculation treatment tank and a solid-liquid separation device. Silicon dioxide with the particle size smaller than 0.075 mm in solid waste generated after coal washing wastewater treatment is a maincomponent; dehydration drying treatment is performed; then caustic soda is added; the mixture is calcined and ground; a calcined product is added into a hydrochloric acid solution and / or acidic minewastewater for activation treatment, and by combining iron and aluminum particles in the residual sludge with lime added in the coal washing wastewater process, polyaluminum ferric calcium silicate isfinally formed, thereby obviously enhancing the sedimentation efficiency of the coal washing wastewater.

Description

technical field [0001] The invention belongs to the field of coal washing wastewater treatment, and in particular relates to a coal washing wastewater treatment system. Background technique [0002] Wet coal preparation requires a lot of water. Taking jigging coal washing as an example, 3-5 cubic meters of circulating water is needed for every 1 ton of raw coal selected, and some clean water needs to be added, and this water will turn into waste water containing a large amount of oil and fine particles. This kind of coal washing water containing suspended particles with a particle size of less than 1mm is called coal slime water, also called coal washing wastewater. [0003] In the actual production process, coal washing wastewater is a weakly alkaline stable colloidal dispersion system, which has the following remarkable characteristics: high concentration of suspended solids (50-90g / L), high concentration of COD, high content of fine particles (less than 0.075mm The parti...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/10
CPCC02F9/00C02F1/001C02F2001/007C02F1/5236C02F3/00C02F2103/10
Inventor 袁中帮郭峰万华凯张蒙刘旋
Owner 袁中帮
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