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ADCA (Azodicarbonamide) foaming agent liquid waste disposal process

A technology of waste liquid treatment and foaming agent, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, inorganic chemistry, etc., to achieve obvious effects, reduce short-circuit temperature difference loss, and reduce fluid resistance

Inactive Publication Date: 2013-04-17
ZAOZHUANG ZHONGKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This shows that the above-mentioned existing ADCA blowing agent waste liquid treatment process needs to be further improved urgently

Method used

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  • ADCA (Azodicarbonamide) foaming agent liquid waste disposal process
  • ADCA (Azodicarbonamide) foaming agent liquid waste disposal process

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Embodiment Construction

[0073] For further elaborating the technical means and effects that the present invention takes to achieve the intended invention purpose, below in conjunction with accompanying drawing and preferred embodiment, its specific implementation method of ADCA foaming agent waste liquid treatment process that proposes according to the present invention is described in detail as follows: Rear.

[0074] see figure 1 Shown, the ADCA foaming agent waste liquid treatment process of preferred embodiment of the present invention, it mainly comprises the following steps:

[0075] (1) Preheat. The waste liquid is preheated to 40°C-60°C in four stages with the next-stage material (or called four-effect or four-stage preheating). Among them, the advantage of step-by-step heating is energy saving. Preheating the material with the material can preheat the original material with the next level of material; if heating from the original temperature to the required temperature at one time, the fir...

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Abstract

The invention relates to an ADCA (Azodicarbonamide) foaming agent waste liquor treatment process which comprises the following steps of: preheating waste liquor to 40-60 DEG C; treating the waste liquor in a vacuum crystallizer under the condition that the temperature is 45-130 DEG C and the vacuum degree is 0-0.1 MPa; separating out sodium sulfate; reducing the temperature of a mother solution obtained after the sodium sulfate is separated to 35-40 DEG C, and crystallizing under the condition that the vacuum degree is 0.080-0.085 MPa; and separating out ammonium chloride. The ADCA foaming agent waste liquor treatment process provided by the invention can recover the sodium sulfate and the ammonium chloride under the precondition of zero sewage discharge and can greatly reduce the treatment cost of waste water.

Description

technical field [0001] The invention relates to a new process in the field of waste liquid treatment, in particular to an ADCA foaming agent waste liquid treatment process. Background technique [0002] ADCA, that is, azodicarbonamide, the molecular formula is H 2 NCONNCONH 2 , Appearance is light yellow crystalline powder. ADCA itself is non-toxic, odorless, non-flammable, and has the characteristics of large gas generation, uniform bubbles, no pollution to the product, no corrosion to the mold, adjustable decomposition temperature, and does not affect the curing and molding speed, so it is widely used in PVC Foaming of synthetic materials such as ethylene, polyethylene, polypropylene, polystyrene, ABS and various rubbers. However, ADCA foaming agent produces a large amount of ammonia nitrogen waste liquid in the production process, which will cause serious environmental pollution if not treated. The discharge of a large amount of ammonia nitrogen waste liquid into the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C01D5/00C01C1/16
Inventor 田振民秦峰鲍家民杨杰卓猛赵春花褚建
Owner ZAOZHUANG ZHONGKE CHEM
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