Zero-emission treatment process of sodium chloride wastewater generated by production of aluminum oxide
A treatment process, alumina technology, applied in multi-stage water treatment, water/sewage treatment, natural water treatment, etc., can solve problems such as environmental pollution and technical difficulty, and achieve the effect of efficient resource treatment
Inactive Publication Date: 2016-12-07
ZIBO GERUI WATER TREATMENT ENG
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[0002] High-salt wastewater refers to wastewater with a total salt content of at least 1%. It mainly comes from chemical plants, pharmaceutical factories, etc. There is a high-salt wastewater produced in the production process of alumina. If it is discharged directly, it will be harmful to the environment. Pollution; if it is recycled, the technology is very difficult, and there is no zero-discharge treatment process for sodium chloride wastewater produced by formed alumina in the prior art
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[0019] Example: see figure 1 , the present invention produces the sodium chloride wastewater zero-discharge treatment process that produces alumina, comprises the following steps: a. First use the wastewater pump to extract the wastewater from the high-salinity wastewater tank, and b. Treatment, c. send the preliminary treated wastewater to the salt separation device to further concentrate and crystallize the waste water and separate the salt, d. send the waste water after the salt separation device to the recycling device for treatment, and then it can be processed by the recycling device Fresh water is output, and the resource treatment device in step d. will also output hydrochloric acid and lye, the hydrochloric acid can be recycled for acid washing of alumina, and the lye can be recycled for alkali washing of alumina.
[0020] see figure 2 , the filter device includes an electric butterfly valve 1, a pressure gauge with a pressure sensor 2, a flow sensor 3, a butterfly ...
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The invention specifically relates to a zero-emission treatment process of sodium chloride wastewater generated by production of aluminum oxide and belongs to the technical field of high-salt-content wastewater treatment. The zero-emission treatment process comprises the following steps: a, pumping out wastewater from a high-salt-content wastewater tank by a wastewater pump; b, carrying out primary treatment on the wastewater by utilizing a filtering device; c, conveying the wastewater subjected to the primary treatment into a salt separation device and carrying out condensation and salt separation on the wastewater; d, conveying the wastewater subjected to the salt separation device into an electrochemical recycling treatment device respectively and treating; after treating through the recycling treatment device, obtaining freshwater; converting salt into acid and alkali; recycling the acid and the alkali into an aluminum oxide washing device for carrying out acid washing and alkali washing, so as to realize recycling economy. The zero-emission treatment process provided by the invention realizes efficient recycling treatment on the high-salt-content wastewater and the treated freshwater is recycled; hydrochloric acid and alkali liquid, produced by the treatment, are recycled respectively, so that a zero-emission aim in a whole treatment process is realized.
Description
technical field [0001] The invention specifically relates to a zero-discharge treatment process for sodium chloride wastewater produced in the production of alumina, and belongs to the technical field of high-salt wastewater treatment. Background technique [0002] High-salt wastewater refers to wastewater with a total salt content of at least 1%. It mainly comes from chemical plants, pharmaceutical factories, etc. There is a high-salt wastewater produced in the production process of alumina. If it is discharged directly, it will be harmful to the environment. Pollution; if it is recycled, the technical difficulty is very large, and there is no zero-discharge treatment process for sodium chloride wastewater produced by formed alumina in the prior art. Contents of the invention [0003] The technical problem to be solved by the present invention overcomes the existing defects, and provides a zero-discharge treatment process for sodium chloride wastewater produced by the pro...
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Login to View More IPC IPC(8): C02F9/06C02F1/00C02F1/461C02F103/34
CPCC02F1/001C02F1/46104C02F2103/34C02F2201/46115C02F2209/03C02F2209/40C02F2301/08
Inventor 慕史臣
Owner ZIBO GERUI WATER TREATMENT ENG