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System and method for treatment of organic matters in industrial waste salt by fractional gas stripping by use of hot fluid

An industrial waste salt and thermal fluid technology, applied in the purification of alkali metal chlorides and alkali metal halides, etc., can solve the problems of rising operating costs and declining stability, preventing caking and blocking, large waste salt treatment capacity, etc. The effect of short harmless treatment time

Active Publication Date: 2018-08-17
LIAOCHENG LUXI POLYCARBONATE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can effectively avoid melting, wall formation, and adhesion in waste salt treatment. However, complex structures such as hierarchical treatment and segmental temperature control increase the operating cost of the device and decrease the stability of long-term operation.

Method used

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  • System and method for treatment of organic matters in industrial waste salt by fractional gas stripping by use of hot fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Polycarbonate waste salt, moisture content 1%, organic matter (TOC) content 3000-6000ppm.

[0025] (1) The propane liquid from the storage tank is heated and vaporized by the vaporizer, then enters the nozzle through the control valve, and then enters the hot blast stove (3), where it burns in contact with the air sent by the blower (2), A thermal fluid is formed.

[0026] (2) The raw material salt warehouse (13) continuously sends industrial waste salt into the secondary gas stripping flue gas pipeline (6) through the belt conveyor, and the flue gas enters the secondary cyclone separator after the salt is preheated to 150-400°C ( 7), the solid salt particles are separated from the flue gas, the solid salt particles enter the intermediate salt bin (14), and the flue gas enters the tail gas treatment device.

[0027] (3) The solid salt in the middle salt bin (14) enters the first-stage air-intensified flue gas pipeline (4) through the belt conveyor, and the high-tempera...

Embodiment 2

[0031] Benzyl chloride waste salt, moisture content 3%, organic matter (TOC) content 6000-10000ppm.

[0032] (1) The liquefied natural gas from the storage tank is heated and gasified by the vaporizer, then enters the nozzle through the control valve, and then enters the hot blast stove (3), where it burns in contact with the air sent by the blower (2), A thermal fluid is formed.

[0033] (2) The raw material salt warehouse (13) continuously sends industrial waste salt into the secondary gas stripping flue gas pipeline (6) through the belt conveyor, and the flue gas enters the secondary cyclone separator after the salt is preheated to 150-400°C ( 7), the solid salt particles are separated from the flue gas, the solid salt particles enter the intermediate salt bin (14), and the flue gas enters the tail gas treatment device.

[0034] (3) The solid salt in the middle salt bin (14) enters the first-stage air-intensified flue gas pipeline (4) through the belt conveyor, and the hig...

Embodiment 3

[0038] Formic acid waste salt, moisture content 5%, organic matter (TOC) content 4000-6000ppm.

[0039] (1) The liquefied synthesis gas from the storage tank is heated and gasified by the vaporizer, then enters the nozzle through the control valve, and then enters the hot blast stove (3), where it burns in contact with the air sent by the blower (2) , forming a thermal fluid.

[0040](2) The raw material salt warehouse (13) continuously sends industrial waste salt into the secondary gas stripping flue gas pipeline (6) through the belt conveyor, and the flue gas enters the secondary cyclone separator after preheating the salt to 150-400 °C ( 7), the solid salt particles are separated from the flue gas, the solid salt particles enter the intermediate salt bin (14), and the flue gas enters the tail gas treatment device.

[0041] (3) The solid salt in the middle salt bin (14) enters the first-stage air-heated flue gas pipeline (4) through the belt conveyor, and the high-temperatu...

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Abstract

The invention discloses a system and a method for treatment of organic matters in an industrial waste salt by fractional gas stripping by use of a hot fluid, and the system comprises a hot fluid generating device, a fractionating gas stripping device and a tail gas treating device. The industrial waste salt is continuously fed in from a secondary gas stripping device. The material is preliminarilygas-stripped and dried by the hot fluid, then enters an intermediate salt silo through a secondary cyclone separator, then enters a first gas stripping device through a conveying device, and is gas-stripped by the high-temperature hot fluid to a first cyclone separator to discharge, the temperature in the hot fluid generating device is 700-1000 DEG C, the temperature of the first gas stripping device is 400-800 DEG C, and the temperature of the secondary gas stripping device is 150-400 DEG C, the retaining time of the material is 2 to 5 seconds, the organic matters in the industrial waste salt are decomposed into a volatile tail gas under the action of first-stage hot fluid heating, and the tail gas is discharged to a high altitude after being dusted by a cloth bag. The system can rapidlydecompose the organic matters in the industrial waste salt, the tail gas is recycled and utilized, and the treated industrial salt is used as a high quality raw material of a chloralkali device.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a system and method for treating organic matter in industrial waste salt by thermal fluid staged gas stripping. Background technique [0002] In the industrial production process of fine chemicals and polymer materials, a large amount of salty wastewater will be produced, and the by-product waste brine often contains a large amount of organic matter. After the waste salt is separated through evaporation and concentration processes, the refractory organic matter is still entrained Among the waste salt, it is difficult for industrial waste salt to be used in downstream fine chemical production. The trace amount of organic matter and a small amount of water contained in industrial waste salt will make it easy to agglomerate. Long-term storage will not only cause safety hazards to the environment, but also occupy a large amount of enterprise costs, becoming a bo...

Claims

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Application Information

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IPC IPC(8): C01D3/14C01D3/04
CPCC01D3/04C01D3/14C01P2006/80
Inventor 孙彩虹胡大春张照飞曹全福
Owner LIAOCHENG LUXI POLYCARBONATE CO LTD
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