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Industrial waste salt treatment method and treatment device

A treatment method and technology of industrial waste salt, applied in water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problems of high energy consumption and difficult reuse of downstream industrial inorganic salts, etc.

Pending Publication Date: 2021-05-25
SHANGHAI ELECTRICGROUP CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, the existing treatment methods for industrial waste salt with low organic content have the problems of high energy consumption and difficulty in being reused by downstream industrial inorganic salts.

Method used

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  • Industrial waste salt treatment method and treatment device
  • Industrial waste salt treatment method and treatment device

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Embodiment 1

[0089] This embodiment is a treatment method for industrial waste salt, including a physical and chemical treatment section, a deep oxidation section and a salt production section, wherein the specific treatment process of each section is as follows:

[0090] S1) Physical and chemical treatment section

[0091] 1. Thermally dissolve organic matter and waste salt with an ammonia nitrogen content of 0.2-2% at 40-60°C to obtain a saturated solution of waste salt;

[0092] 2. Carry out chemical dosing to the saturated solution of waste salt to remove impurities, through a specific dosing sequence and dosing control program, the operation steps are as follows:

[0093] 1) adjust the pH value of the saturated solution of waste salt to 9.5-11.5, and precipitate the Mg contained in the saturated solution of waste salt 2+ , Fe 3+ other impurities;

[0094] 2) Add excess calcium reagent (CaCl 2 , Ca(OH) 2 ) to remove more PO in the waste salt solution 4 3- and F - Etc. Calcium r...

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Abstract

The invention relates to the field of waste salt treatment, and discloses an industrial waste salt treatment method and device, and the treatment method comprises the following steps: carrying out electrochemical oxidation treatment on a waste salt solution subjected to physical and chemical impurity removal treatment; and carrying out ultrasonic oxidation treatment on the waste salt solution subjected to the electrochemical oxidation treatment. Aiming at the industrial waste salt with low organic matter content, the purpose of recycling the treated waste salt can be achieved while the treatment energy consumption is reduced.

Description

technical field [0001] This application relates to the field of industrial waste salt treatment, in particular to a treatment method and treatment device for industrial waste salt. Background technique [0002] The biggest difficulty in resource disposal of industrial waste salt is that the product outlet has not been solved, because the composition of industrial waste salt is complex. The impurities in waste salt mainly include various organic substances and various inorganic impurities (PO 4 3- , F - , NH 3 -N, S 2- , Ca 2 + , Mg 2+ ). Among them, PO 4 3- , S 2- , Ca 2+ , Mg 2+ It is a relatively conventional inorganic impurity, and the treatment process is relatively mature, while organic matter, NH 3 The treatment of impurities such as -N is more difficult. For the removal of organic matter, high-temperature pyrolysis is mostly used. This method consumes a lot of energy and needs to be equipped with corresponding tail gas treatment devices. The disposal ...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F1/28C02F1/36C02F1/467C02F101/14C02F101/16C02F101/30
CPCC02F9/00C02F2101/30C02F2101/14C02F2101/16C02F1/4672C02F1/36C02F1/283
Inventor 程兴龙王隽哲孙军陆钧皓
Owner SHANGHAI ELECTRICGROUP CORP
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