Small-sized device for treating chromate waste water by virtue of automatic pH regulation, oxidoreduction and activated carbon and application thereof

Abstract

The invention discloses a small-sized device for treating chromate waste water by virtue of automatic pH regulation, oxidoreduction and activated carbon and application thereof. The device is composed of a water inlet pipe, an oxidoreduction region, an absorption region, a water outlet region, a chromium slag discharge pipe, an acid-base and reducing agent feeding pipe and a water discharge pipe, wherein the water inlet pipe is arranged on the top of a reaction device; the water inlet pipe is linked with the oxidoreduction region; the absorption region is located at the outer layer of the oxidoreduction region; the acid-base and reducing agent feeding pipe, a stirrer and a pH detector are arranged on the top of a reactor; the chromium slag discharge pipe is placed at the bottom of the oxidoreduction region; the absorption region is communicated with the oxidoreduction region through a valve; the valve is arranged at the bottom of the absorption region; an activated carbon column is arranged in the absorption region; the water outlet region is located outside the absorption region; and a water outlet pipe is arranged at the bottom of the water outlet region. The chromate waste water passes through the oxidoreduction region and the absorption region and then is removed by virtue of the water outlet region, thereby achieving the effective removal of chromium ions in the chromate waste water.

Description

Technical field [0001] The invention relates to a device for treating small-scale chromium-containing wastewater, in particular to treating township electroplating chromium-containing wastewater. Effectively improving the existing chromium removal device, it is an integrated small-scale automatic adjustment of pH redox and activated carbon treatment of chromium-containing wastewater in electroplating enterprises. Background technique [0002] Chromium is one of the harmful elements that pollute the environment and affect human health. At present, among the commonly used processes for treating chromium-containing electroplating wastewater in my country, one is the activated carbon method. Activated carbon uses carbon-based substances as raw materials, which have a very developed microporous structure and a high specific surface area. It has strong physical adsorption capacity and can effectively adsorb Cr(VI) in wastewater. However, due to the height of the adsorption tower,...

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Problems solved by technology

[0004]In order to overcome the manual addition of acid and alkali in the existing chromium removal device, the cumbersome operation and possible errors caused by the redox reaction are unfavorable for the removal of chromium Influence, the present invention provides a chromium removal device, which can not only effectively solve the cumbersome operation caused by manual addition of acid and alkali, save operating costs, but also use the adsorption capacity of activated carbon to regenerate the chromium remaining in the solution. Treatment to prevent incomplete reaction from causing chromium remaining in the solution to pollute the environment

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