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A kind of wastewater treatment agent in the middle stage of papermaking

A technology for treating waste water and chemicals in the middle stage of papermaking, which is applied in the direction of waste water treatment in the processing process, flocculation/sedimentation water/sewage treatment, etc. It can solve the problems of high cost of chemicals per ton of water treatment, low treatment efficiency, and large amount of sludge. Excellent COD removal rate, speed up the separation process, and reduce costs

Active Publication Date: 2019-06-04
RED WOOD SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide a kind of wastewater treatment agent in the middle stage of papermaking, which solves the problem that in the single use process in the prior art, the dosage of water per ton of water is often large, the amount of sludge produced is large, the treatment efficiency is not high, and the cost of treatment agent per ton of water is high. High, can not guarantee that the chromaticity can meet the relevant national emission standards

Method used

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  • A kind of wastewater treatment agent in the middle stage of papermaking
  • A kind of wastewater treatment agent in the middle stage of papermaking
  • A kind of wastewater treatment agent in the middle stage of papermaking

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Embodiment Construction

[0019] In order to make the purpose of the present invention and the advantages of the technical solution more clear, the present invention will be further described in detail below in conjunction with examples.

[0020] The preparation process of the wastewater treatment agent in the middle stage of papermaking is as follows:

[0021] Raw material pretreatment

[0022] The fly ash is soaked in 0.6-0.7mol / L hydrochloric acid solution for 10-12 hours, ultrasonically treated at a frequency of 50-100KHz for 2-3 hours, filtered, dried at 100-150°C, ground and crushed to a fineness of 200-300 mesh.

[0023] Diatomite is soaked in 0.2-0.3mol / L hydrochloric acid solution for 10-12 hours, ultrasonically treated at 50-100KHz frequency for 2-3 hours, filtered, roasted at 450-550°C for 2-4 hours, cooled, ground and crushed to a fineness of 200-300 head.

[0024] The molecular weight of polyethylene glycol is 600-4000. After heating and dissolving it, add sodium bicarbonate while stirri...

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Abstract

The invention discloses a papermaking middle-stage wastewater treatment chemical. The papermaking middle-stage wastewater treatment chemical is characterized by being prepared from 80-90 parts of poly aluminum chloride, 10-20 parts of fly ash, 10-20 parts of kieselguhr, 6.5-13.5 parts of polyferric sulfate, 1-2 parts of sodium bicarbonate, 1.5-3 parts of citric acid, 0.5-1 part of polyethylene glycol, 1-60 parts of attapulgite and 1-2 parts of polyacrylamide. By means of the papermaking middle-stage wastewater treatment chemical, the problems that in the prior art, in the single using process, the chemical using quantity per ton of water is often large, the amount of generated mud is large, the treating efficiency is not high, the treating chemical cost per ton of water is high, and it cannot be guaranteed that the color degree meets the relevant national emission standards are solved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an agent for treating waste water in the middle stage of papermaking. Background technique [0002] The pulp and paper industry is an industry that is closely related to the national economy, and it is also an industry that consumes a lot of energy and chemical raw materials, consumes a lot of water, and seriously pollutes the environment. Due to the large amount of wastewater discharged from the papermaking industry, and the wastewater contains a large amount of cellulose, lignin, inorganic alkali, tannin, resin, protein, etc., the wastewater has deep color, high alkalinity, high content of refractory substances, and low oxygen consumption. big. It can cause pollution of the entire water body and serious damage to the ecological environment. The middle wastewater is the focus of the entire papermaking wastewater treatment, and decolorization and COD reduction are the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52C02F103/28
CPCC02F1/52C02F2103/28
Inventor 朱永全谭先文罗智勇
Owner RED WOOD SCI & TECH
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