Method for treating DDNP waste water through technologically improved cement rotary kiln by adopting afterheat of cement rotary kiln

A cement rotary kiln and wastewater technology, applied in the field of industrial explosives production, can solve the problems of high toxicity of pollutants, high chroma, large chemical oxygen demand, etc., and achieve huge social benefits, cost reduction, and low cost of technical transformation.

Active Publication Date: 2017-09-08
FUJIAN CIVILIAN BLASTING CHEM
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Problems solved by technology

However, ddnp production wastewater contains dinitrodiazonium phenol, nitro compounds, sulfides, phenols and other harmful substances, with high chroma, high chemical oxygen demand, and the toxicity of the pollutants contained
Moreover, the amount of waste water produced by every kilogram of ddnp produced is 150-250kg. If it is discharged everywhere without treatment, it will inevitably pollute the environment and affect the ecological environment around the water body and the health of nearby residents.

Method used

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  • Method for treating DDNP waste water through technologically improved cement rotary kiln by adopting afterheat of cement rotary kiln

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Embodiment Construction

[0023] Attached below figure 1 The present invention will be further described in detail with specific embodiments. as the picture shows:

[0024] 1. Treat the DDNP wastewater collected by detonator manufacturers with dilute hydrochloric acid or sodium bicarbonate to a pH of 6.5-7.0. Use tank trucks to transport to the DDNP waste water collection pond or storage tank of cement production enterprises for use.

[0025] 2. DDNP wastewater is pumped to the upper part of the waste heat treatment device of the cement rotary kiln by pumping 1000Kg. The waste water is from the upper part due to gravity from top to bottom. Since the device is closely attached to the cement rotary kiln, the waste heat of the cement rotary kiln is about 1000 ℃.

[0026] 3. The DDNP wastewater pumped to the waste heat treatment device of the cement rotary kiln is heated through the device cycle. The cycle time is 30 minutes, and the waste liquid concentration is detected through the discharge port. When...

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Abstract

The invention provides a method for treating DDNP waste water through a technologically improved cement rotary kiln by adopting afterheat of the cement rotary kiln. Through cooperating with surrounding existing cement enterprises, an existing cement rotary kiln is improved by using a low cost, and the afterheat, with a high temperature of nearly 1000 degrees, of the technologically improved cement rotary kiln is utilized to conduct evaporating treatment on the waste water; and after the waste water is treated to a certain concentration, the treated waste water is subjected to burning treatment. According to the method for treating the DDNP waste water through the technologically improved cement rotary kiln by adopting the afterheat of the cement rotary kiln, the environmental pollution is reduced, the difficulty of technological improvement can further be reduced, and the cost for treating the DDNP waste water is reduced.

Description

[0001] 1. Technical field: [0002] The invention relates to the field of industrial explosive production, in particular to a new method for treating DDNP wastewater, in particular to a method for treating DDNP wastewater by technically improving a cement rotary kiln and utilizing residual heat. [0003] 2. Background technology: [0004] At present, in industrial detonator production enterprises, the primer is the basic agent for the detonation of the detonator. There are many kinds of explosives. Due to the pressure of environmental protection, many domestic enterprises have invested a lot of resources in the production of explosives and wastewater treatment. Especially the DDNP priming agent is dinitrodiazophenol, which has high flame sensitivity and mechanical sensitivity, its product performance is superior, and its production cost is low. However, due to the large amount of waste water generated in the production process and the difficulty in treatment, many production c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00C02F9/10C02F101/34C02F101/38C02F1/66C02F1/04
CPCC02F1/04C02F1/66C02F9/00C02F2101/345C02F2101/38C02F2301/08F27D17/004Y02P10/25
Inventor 王庆土郑巧芳李园
Owner FUJIAN CIVILIAN BLASTING CHEM
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