Device and method for processing chromium-containing wastewater

A technology for chromium wastewater and wastewater, applied in chemical instruments and methods, filtration treatment, special compound water treatment, etc., can solve problems such as lack of attention to chromium-containing wastewater, ineffective treatment of wastewater, poor treatment effect, etc., to achieve Reduce running, emitting, dripping and leaking, fewer types of agents, and better treatment effect

Active Publication Date: 2015-07-15
NEW METALLURGY HI TECH GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the focus of current research and design is mainly on the treatment of chromium-containing wastewater with large discharge and low concentration, but the degree of attention to chromium-containing wastewater with small discharge and high concentration is lacking.
Specifically, when the existing treatment process and equipment are applied to the chromium-containing wastewater with small discharge and high concentration, the treatment effect is generally not good, some wastewater cannot be effectively treated, the operation is cumbersome, the equipment is idle for a long time, and the equipment is severely corroded. and other issues

Method used

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  • Device and method for processing chromium-containing wastewater
  • Device and method for processing chromium-containing wastewater
  • Device and method for processing chromium-containing wastewater

Examples

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example 1

[0061] The annual output is 5m 3 Chromium-containing waste water, wherein total chromium content is 18g / L, it is passed into 1m according to the present invention 3 In the device for treating chromium-containing waste water per h, first pass hydrochloric acid in the pH adjustment tank 101, and the pH detection value in the tank is set to 2.5-3; then add sulfurous acid to the primary reduction tank 102 and the secondary reduction tank 103 Sodium hydrogen reducing agent, the ORP value in the secondary reduction tank 103 is set to 150mV-200mV; then the sodium hydroxide solution is passed into the neutralization tank, and the pH detection value in the tank is set to 7-8; then the waste water is pumped into the plate frame In the filter press, the total chromium in the effluent after filtration is 0.38mg / L (less than or equal to the standard value of 1mg / L), and the positive hexavalent chromium is 0.17mg / L (less than or equal to the standard value of 0.2mg / L), reaching the "Electro...

example 2

[0063] The annual output is 10m 3 Chromium-containing waste water, wherein total chromium content is about 15g / L, it is passed into 1m according to the present invention 3 In the device for treating chromium-containing waste water per hour, hydrochloric acid is first passed into the pH adjustment tank 101, and the pH detection value in the tank is set to 2-2.5, and then sulfurous acid is added to the primary reduction tank 102 and the secondary reduction tank 103 Sodium hydrogen reducing agent, so that the ORP value in the secondary reduction tank 103 is set to 150mV-180mV, and then the calcium hydroxide emulsion is passed into the neutralization tank, and the pH detection value in the tank is set to 7.5-8, and then the waste water is pumped into the plate In the frame filter press, the total chromium in the effluent after the filter press is 0.15mg / L (less than or equal to 1mg / L), and the positive hexavalent chromium is 0.14mg / L (less than or equal to 0.2mg / L), which meets th...

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PUM

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Abstract

The invention provides a device and method for processing chromium-containing wastewater. The device comprises a tank, a first partition plate, a second partition plate, and a third partition plate; the tank is divided by the first partition plate, the second partition plate, and the third partition plate into a pH adjusting tank, a primary reduction tank, a secondary reduction tank, and a neutralizing tank in the horizontal direction in sequence; a water outlet is arranged in the bottom of the neutralizing tank, a solid/liquid separating device is arranged in the water outlet; the bottom surface of the tank is inclined, each partition plate is provided with a water outlet, and the chromium-containing wastewater in the pH adjusting tank can flow through the primary reduction tank, the secondary reduction tank, and the neutralizing tank in sequence. Through the provided device and method, the wastewater with a small discharge amount can be processed by a less dosage, and the processing procedure can be simplified.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, in particular, the invention relates to a device for treating chromium-containing wastewater and a method for using the device to treat chromium-containing wastewater. Background technique [0002] The total chromium in wastewater belongs to the first class of pollutants, and its random discharge will lead to serious pollution in a large area, so the above problems have been widely paid attention to. However, the current research and design focuses on the treatment of chromium-containing wastewater with large discharge and low concentration, while the emphasis on chromium-containing wastewater with small discharge and high concentration is lacking. Specifically, when the existing treatment process and equipment are applied to the chromium-containing wastewater with small discharge and high concentration, the treatment effect is generally not good, some wastewater cannot be effectively treated,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F1/003C02F1/38C02F1/66C02F1/70C02F9/00C02F2101/22C02F2305/023C02F2305/04
Inventor 郭振英王海林聂兴利张艺灵
Owner NEW METALLURGY HI TECH GRP
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