Steel mill integrated sewage treatment system with low dosage and high recovery rate and treatment method thereof

A sewage treatment system with high recovery rate technology, applied in neutralization water/sewage treatment, water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of many coagulants, low wastewater recovery rate and high cost , to achieve the effect of reducing the degree of corrosion, reducing the consumption of medicine and improving the utilization rate

Inactive Publication Date: 2018-10-16
无锡容大环境科技有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the coagulants used in the prior art are many, the cost is high, and the waste water recovery rate is low

Method used

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  • Steel mill integrated sewage treatment system with low dosage and high recovery rate and treatment method thereof

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Experimental program
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Effect test

Embodiment 1

[0020] Embodiment 1: as figure 1 As shown, the comprehensive sewage treatment system of a steel plant with low dosage and high recovery rate includes a regulating tank 1, a high-efficiency sedimentation device 2, a neutralization reaction tank 5, a V-shaped filter tank 6, an intermediate tank 7, a self-cleaning filter 8, Ultrafiltration device 9, ultrafiltration water tank 10, No. 1 security filter 11, No. 1 reverse osmosis device 12, No. 1 thick water tank 13, reuse water tank 14, No. 2 concentration device, sludge dehydration device 4, backwashing device 18 , regulating tank 1, high-efficiency sedimentation device 2, neutralization reaction tank 5, V-shaped filter tank 6, intermediate tank 7, self-cleaning filter 8, ultrafiltration device 9, ultrafiltration water tank 10, No. 1 security filter 11, The No. 1 concentration device 12 and the reuse water pool 14 are sequentially connected through pipelines. The No. 1 reverse osmosis device 12 is provided with a No. 1 concentrate...

Embodiment 2

[0021] Example 2: During operation, steel plant raw material area, sintering area, pelletizing area, blast furnace area, oxygen production area, steelmaking, continuous casting area, wire bar area, power plant area (including demineralized water station), softened water station After the sewage and wastewater in the whole site, such as public and auxiliary areas, are uniform in water quality and quantity in the adjustment pool 1, the raw water pump is pressurized and lifted into the rapid mixing pool 21 in the high-efficiency sedimentation device, and then lime or soda ash is added to adjust the pH to 9-10.5. Add polyaluminum chloride for coagulation and precipitation, the dosage of polyaluminum chloride is 10-20kg / 1,000 tons of wastewater; the water after coagulation and precipitation enters the flocculation reaction tank 22 in the high-efficiency sedimentation device to flocculate with polyacrylamide reaction, the dosage of polyacrylamide is 20-50kg / 1000 tons of wastewater, a...

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Abstract

The invention provides a steel mill integrated sewage treatment system with a low dosage and a high recovery rate. A regulation tank, an efficient sedimentation separation device, a neutralization reaction pool, a V-shaped filter, an intermediate water pool, a self-cleaning filter, an ultrafiltration device, an ultrafiltration water tank, a No.1 security filter, a No.1 concentration device and a reuse water pool are sequentially communicated by pipelines; the No.1 concentration device is provided with a No.1 concentrated water outlet; the No.1 concentrated water outlet is communicated with theinterior of a No.1 concentrated water pool by a pipeline; the efficient sedimentation separation device comprises a rapid mixing pool, a flocculoreaction pool and a sedimentation separation pool; a sludge discharge hopper is arranged at the bottom of the sedimentation separation pool; a lifting pump is arranged at the upper part of the sludge discharge hopper; the lifting pump is communicated with the rapid mixing pool by a pipeline; a sludge discharge outlet is formed at the bottom of the sludge discharge hopper; the sludge discharge outlet is communicated with a sludge storage pool by a pipeline. The invention further provides a method for treating sewage by the system. According to the invention, sludge with catalyst properties flows back, the activity and the sedimentation effect of floccule are reinforced, and a flocculation agent is saved; the recovery rate of the system is improved.

Description

technical field [0001] The invention relates to a steel mill sewage treatment system and a treatment method thereof, in particular to a steel mill comprehensive sewage treatment system with low dosage and high recovery rate and a treatment method thereof. Background technique [0002] Using industrial sewage to make reuse water is a common treatment method for major iron and steel enterprises at present; at present, industrial sewage is mainly collected and treated to make reuse water for production; industrial sewage undergoes conventional water treatment processes (such as coagulation, Sedimentation, degreasing, filtration, etc.) to make reuse water, the suspended solids and impurities in the original industrial sewage have been effectively removed, but the salt content has not been reduced, so the salt content in the reuse water is far Higher than industrial net circulating water and turbid circulating water. In view of the characteristics of recycled water quality, it c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F103/16
CPCC02F9/00C02F2301/08C02F2303/14C02F2001/007C02F2103/16C02F1/444C02F1/441C02F1/56C02F1/66C02F1/5236C02F1/001
Inventor 黄振兴万平
Owner 无锡容大环境科技有限公司
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