Recycling method of rinsing liquid in the production process of bleaching powder

A production process and treatment method technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as uneven acid quality, environmental pollution, and environmental protection issues , to achieve the effects of strong operability, simple condition control and short processing time
CN104724857BInactive Publication Date: 2016-08-24TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2016-08-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for recycling treatment of a rinsing solution during production of a bleaching powder concentrate. The method comprises the following steps: (1) adding a pickling solution into the rinsing solution at 25-80 DEG C while stirring to ensure that the pH value is equal to 4-5, and stirring uniformly to obtain an orange red sticky substance; (2) adding the pickling solution while stirring to ensure that the orange red sticky substance becomes block liquid; (3) adding the rinsing solution while stirring to ensure that the pH value is equal to 7-7.5 and the black liquid gradually becomes liquid containing orange red particles and generates chlorine, stirring continuously, and collecting chlorine; and (4) filtering the liquid containing the orange red particles to obtain a colorless, clarified and transparent neutral liquid and a red brown filter cake, washing the filter cake, and drying, grinding and firing to obtain iron oxide red. The method disclosed by the invention can be used for treating two types of industrial wastewater, and iron oxide red and chlorine are obtained at the same time, so that the method is green and environment-friendly. The method is short in treatment time, simple to operate, low in energy consumption, and suitable for treatment and production manners under industrial conditions.
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Description

technical field

[0001] The invention relates to the technical field of preparation of inorganic functional materials, in particular to a method for recycling rinse liquid in the production process of bleaching powder concentrate. Background technique

[0002] Bleaching powder is high-concentration calcium hypochlorite, and its main component, calcium hypochlorite, has an effective chlorine content of over 70%. It can be used as a high-efficiency bleaching agent for cotton and silk products, and can also be used as a household and industrial disinfectant. Disinfectants and water treatment for swimming pools. Because of its high stability and strong heat resistance, bleaching powder is suitable for long-distance transportation and is widely favored. The production of bleaching powder varies with different raw materials. There are two kinds of products made by passing chlorine gas: calcium method and sodium method. However, no matter which process is used, there will be a by-...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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