Integrated wastewater hardness removal device and treatment method

Abstract

The invention discloses an integrated wastewater hardness removal device and a treatment method thereof. The hardness removal device comprises a device body, and the device body comprises a pH adjusting area, a precipitation area I, an aeration area, a precipitation area II and a control module. During operation, the to-be-treated wastewater and the waste alkali liquor are pumped into the pH adjusting area separately, the water with the adjusted pH value flows into the precipitation area I, and the suspended solids and part of hardness in the wastewater are removed in the precipitation area I;the water treated in the precipitation area I is sent to the aeration area for carbon dioxide aeration, the water subjected to carbon dioxide waste gas aeration flows into the precipitation area II,the water meeting the requirements after the hardness removal in the precipitation area II enters a sewage biochemical treatment system, and the precipitates generated during the process are discharged through a sludge discharge pipe to a sludge treatment device for treatment. The device is a waste water hardness removal treatment measure with high efficiency and low operation cost, and is suitable for the hardness removal requirements of the industries, such as coal gasification waste water with high hardness and high suspended solids, etc.

Description

technical field [0001] The invention relates to a waste water hard removal device and method, in particular to an integrated waste water hard removal device and a treatment method for reducing suspended matter and hardness in industrial waste water by utilizing waste lye and carbon dioxide waste gas. Background technique [0002] With the increasingly serious problem of water shortage, the coal chemical industry and other industries have further increased the discharge standards of wastewater generated in the production process. With coal as the main raw material, the wastewater generated during the production process contains a large amount of inorganic ash, with high hardness (generally 900-1400mg / L (calculated as calcium carbonate)) and high content of suspended solids (generally 20-500mg / L )Features. Due to the relatively high hardness in gasification wastewater, mainly calcium hardness, it has many adverse and serious effects on the wastewater treatment system: [000...

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Problems solved by technology

[0009] In view of this, in view of the problems existing in the existing treatment devices and processes, this application proposes an integrated wastewater hardening device, which is used to efficiently remove the hardness of coal gasification wastewater and reduce suspended solids in wastewater. It solves the problems of scaling and fouling of the treatment system, ensures the long-term stable operation of the wastewater treatment system, and reduces the daily operating costs

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