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Wastewater treatment method

A waste water treatment, waste water technology, applied in the direction of water/sewage treatment, neutralized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of low separation speed and separation efficiency, inability to degrade organic matter, waste of resources, etc. , to achieve the effect of fast separation speed, efficient desalination and energy saving

Inactive Publication Date: 2018-09-21
内蒙古苏德环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the evaporative separation process, a heat source is required to supply heat, and there are azeotropes in the evaporative separation process, which makes the separation speed and separation efficiency of the multi-stage evaporative separation in the prior art too low, and consumes energy and wastes resources.
In addition, the method of multi-stage evaporative separation cannot degrade organic matter

Method used

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  • Wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] The COD of waste water in the hazardous waste treatment center is 100,000 mg / L, and the salt content is 100,000 mg / L. In addition, it contains a large amount of heavy metals such as arsenic, chromium, and nickel. The wastewater from the waste treatment center is introduced into the pretreatment tank at a flow rate of 3.6T / h, the pH is adjusted to 3.5-4.5 by adding sulfuric acid, and ferrous sulfate and hydrogen peroxide are added to carry out Fenton’s advanced oxidation. The dosage is 30kg / ton and 25L / t, after a residence time of 1.5 hours, add sodium hydroxide to adjust the pH to 10, and then add polyferric sulfate and PAM (polyacrylamide) for flocculation and precipitation. The liquid obtained in this process contains 60,000mg / L of COD, and the sludge output is 200kg / h. Solids such as sludge are solidified and landfilled by pressure filtration, and the liquid after separating the solids enters the evaporative drying system. Evaporated solid output is 600kg / h, and ste...

Embodiment 2

[0065]The COD of wastewater in the hazardous waste treatment center is 67000mg / L, and the salt content is 250000mg / L. In addition, it contains a large amount of compounds such as nitrogen and phosphorus, as well as heavy metals such as arsenic, chromium and nickel. The waste water from the waste treatment center is introduced into the pretreatment tank at a flow rate of 4.5T / h. After adding COD removal agent (5kg / ton of water) and diatomaceous earth (1kg / ton of water), after stirring for 10 minutes, it enters the plate and frame filter press Machine solid-liquid separation, waste water COD did not decrease significantly, but the chromaticity decreased by 50%. The solid output is 53kg / h, which is directly landfilled. The liquid after filtering out the solid enters the evaporative drying system, and the evaporated solid output is 1410kg / h, and the steam production is 3.1T / h. The COD content in the waste gas (water vapor doped with other harmful substances) condensate is 4000mg / L...

Embodiment 3

[0067] The landfill leachate concentrate has a COD of 25,000mg / L and a salt content of 75,000mg / L. Due to the small amount of water, the waste water is treated in the way of accumulative storage and intermittent treatment, and the treatment capacity per hour is 2T / h when driving. After the concentrated liquid in the regulating tank undergoes flocculation and sedimentation, the concentrated sludge enters the evaporative drying equipment after plate and frame pressure filtration. The solid output is 10kg / h, and the liquid after filtering the solid enters the evaporative drying system. Evaporated solid output is 185kg / h, and steam production is 1.8T / h. The COD content in the exhaust gas (water vapor doped with other harmful substances) condensate is 1000mg / L, and the salt content is 1500mg / L. The exhaust gas directly enters the RTO system for incineration, and the combustion temperature is 700-800°C. The nitrogen oxides in the high-temperature tail gas enter the membrane separat...

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Abstract

The invention relates to a wastewater treatment method. The method comprises the following steps of: the pre-treatment on high-salt wastewater is carried out, the liquid-solid separation of the pre-treated high-salt waste water is carried out; the separated solid impurities are removed, and the separated waste water is gasified and treated to form an exhaust gas; the waste gas and the heating airare mixed and sent to an exhaust gas treatment system for incineration to generate high-temperature tail gas; the cooling treatment is carried on the high-temperature tail gas to form liquid and gaseous substances, then the liquid and gaseous substances are treated successively or simultaneously as follows: the liquid substances are separated by membrane, and the water produced by the membrane isdischarged directly after standard separation, the remaining non-standard parts are returned to continue processing; the gaseous substances are further cooled, and then is washed by the spray liquid to become an absorption liquid, and the liquid substances are separated by membrane, and the water produced by the membrane is discharged directly after standard separation, the remaining non-standardparts are returned to continue processing. According to the wastewater treatment method, the organic substances can be efficiently degraded, and meanwhile, the organic substances can be efficiently desalted.

Description

technical field [0001] The invention relates to a method for treating organic high-salt wastewater, in particular to a method for treating high-concentration refractory organic high-salt wastewater. Background technique [0002] High-concentration refractory organic high-salt wastewater is currently the most difficult wastewater to be treated in my country, and it is a recognized problem in domestic and foreign wastewater treatment circles. All kinds of industrial wastewater, such as medicine, petrochemical, coking, papermaking, chemical fiber, printing and dyeing, tanning, hazardous waste treatment filtrate, etc., all belong to this type of wastewater, accounting for about 80% of all industrial wastewater. my country's current industrial wastewater treatment needs are large and difficult to estimate. [0003] The water quality and quantity of this kind of wastewater fluctuate greatly, the composition is complex, the pH value changes greatly, some wastewater has high nitrog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10B01D53/18B01D46/54F23G7/06C02F101/30
CPCB01D46/543B01D53/18B01D2257/302B01D2257/40C02F1/001C02F1/048C02F1/281C02F1/441C02F1/5236C02F1/56C02F1/66C02F1/722C02F9/00C02F2001/007C02F2101/30C02F2305/026F23G7/06
Inventor 胡洪吉姜善军
Owner 内蒙古苏德环保科技有限公司
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