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Sodium chloride ammonium chloride separated crystallization process and device

An ammonium chloride and sodium chloride technology, which is applied in the field of sodium chloride ammonium chloride salt separation crystallization process and devices, can solve the problems of affecting the process of enterprise projects, incomplete treatment of waste liquid, and high energy consumption in the treatment process, and achieves functional efficiency. The effect of low consumption, reduced dependence on boiler installations, and low operating costs

Pending Publication Date: 2018-09-28
苏州鼎昌节能环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the processes adopted by enterprises are to recover most of the water and obtain crystalline salt. However, because the obtained crystalline salt is miscellaneous salt, not only cannot be used as resources, but will be disposed of as hazardous waste. At the same time, waste liquid treatment is not enough. Thoroughly, there is still a large amount of separation liquid to be discharged, and the discharge of waste liquid will still cause water pollution and high energy consumption in the treatment process. These problems plague the enterprise and seriously affect the project process of the enterprise. Zero liquid discharge of high-salt wastewater and resources Chemical treatment is an inevitable trend in the treatment of high-salt wastewater
[0004] The existing sodium chloride and ammonium chloride evaporate to form mixed salt, which can only be used for hazardous waste treatment and cannot be used as industrial salt

Method used

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  • Sodium chloride ammonium chloride separated crystallization process and device
  • Sodium chloride ammonium chloride separated crystallization process and device
  • Sodium chloride ammonium chloride separated crystallization process and device

Examples

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Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, a sodium chloride ammonium chloride salt separation crystallization process, the mass fraction of sodium chloride in the waste water is 6.08%, the mass fraction of ammonium chloride is 5.35%, and the total flow of waste water is 10.8t / h, including the following steps:

[0040]S1. Preheating, waste water is pumped into the preheater from the raw material buffer tank 1 through the feed pump 2 for preliminary temperature rise, and the temperature rise is divided into two steps: the waste water first passes through the hot water preheater (ie, hot water plate preheater) 3- 1 Heating, the heat source is high-temperature condensed water at 105°C, and the waste liquid can be heated to 82°C; and then heated by a steam preheater (steam plate preheater) 3-2, the heat source is steam at 110°C, and the waste water can be heated to 93-95°C;

[0041] S2. evaporation and concentration to obtain supersaturated sodium chloride waste water, the waste water aft...

Embodiment 2

[0065] Such as figure 1 As shown, the structure of the device in this example is the same as that in Embodiment 1, and will not be repeated here.

[0066] A sodium chloride and ammonium chloride salt separation crystallization process, the mass fraction of sodium chloride in wastewater is 5.53%, the mass fraction of ammonium chloride is 7.02%, and the total flow of wastewater is 24.78t / h, comprising the following steps:

[0067] S1. Preheating, waste water is pumped into the preheater from the raw material buffer tank 1 through the feed pump 2 for preliminary temperature rise, and the temperature rise is divided into two steps: the waste water first passes through the hot water preheater (ie, hot water plate preheater) 3- 1 Heating, the heat source is high-temperature condensed water at 105°C, and the waste liquid can be heated to 81°C; and then heated by a steam preheater (steam plate preheater) 3-2, the heat source is steam at 110°C, and the waste water can be heated to 95°...

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Abstract

The invention discloses a sodium chloride ammonium chloride separated crystallization process. The process comprises the steps that sodium chloride is crystallized and precipitated at a high-temperature state, and supersaturated ammonium chloride is precipitated at a low-temperature state, thereby achieving the separation and recovery of sodium chloride and ammonium chloride in wastewater to obtain industrial-grade sodium chloride and ammonium chloride products, the generation of solid waste or hazardous waste is reduced, no emissions causing water pollution exist, and the effect of resource recovery with zero discharge of contaminating fluid is achieved. The sodium chloride ammonium chloride separated crystallization device has the advantages that the structure is reasonably set, energy consumption is reduced, the process can be achieved easily, the automation degree is high, the running cost is low, and the device can be widely applied in actual industrial production processes.

Description

technical field [0001] The invention relates to the technical field of environmental protection wastewater recycling, in particular to a sodium chloride ammonium chloride salt separation crystallization process and a device. Background technique [0002] Wastewater is the general term for the water discharged during people's activities and runoff rainwater. It generally includes domestic sewage, industrial wastewater, and rainwater level other useless water that flows into the drainpipe. It is one of the major public hazards in nature. The waste water and waste liquid produced in production contain industrial production materials, intermediate products, by-products and pollutants produced in the production process that are lost with water. With the rapid development of industry, the types and quantities of waste water are increasing rapidly. Pollution is also becoming more and more extensive and serious, threatening human health and safety. At the same time, sewage also cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C01C1/16C01D3/14C02F101/12C02F101/16
CPCC01C1/164C01D3/14C02F1/04C02F2301/08C02F2101/12C02F2101/16
Inventor 陈文英万磊
Owner 苏州鼎昌节能环保科技有限公司
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