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Resourceful and environment-friendly treatment system for chlorine-containing organic waste gas and waste liquid of organosilicone

A technology for organic waste gas and environmental protection treatment, applied in combustion product treatment, incinerator, climate sustainability, etc., can solve problems such as uneconomical, waste of resources, inability to by-produce silica powder, etc., and achieve long continuous working time , the effect of saving operating costs and reducing waste of resources

Pending Publication Date: 2019-04-19
大连科林能源工程技术开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of the organosilicon industry, the scale of the organosilicon industry across the country is also increasing day by day, and the problem of the treatment of chlorine-containing organic waste gas generated in the production process of the organosilicon industry has also followed. At this stage, the industry's chlorine-containing organic waste gas Most of the treatment methods are direct alkali washing or water washing treatment, and some adsorbents are also used for adsorption. Not only the treatment effect is not good but also uneconomical, a lot of resources are wasted, and the by-products produced need to be treated twice.
As an improvement, the patent No. CN201010522959 provides a combustion treatment process for chlorosilane-containing waste gas and waste liquid in polysilicon production. During the polysilicon production process, the waste gas and waste liquid containing chlorosilane are discharged in the combustion furnace and natural gas is used as fuel. Under the conditions of high temperature of 900-1000°C and pressure of 0.01-0.06 kg, high-temperature hydrolysis of chlorosilane in waste gas and waste liquid produces easy-to-handle SiO 2 , HCl and a small amount of Cl 2 and other substances, recovery of dilute hydrochloric acid through deacidification and alkali washing processes can overcome hydrolysis alkali absorption and lime milk Ca(OH) 2 The neutralization and precipitation treatment is not complete, the chloride ions cannot be removed, and the secondary pollution is serious. However, there are three problems in this process. First, there is no quench tower after the waste heat boiler, which may cause toxic dioxins to be produced in the flue gas. Second, the process does not have a denitrification device, and the acid overflow pipe is located after the alkali washing tower, causing a small amount of HCl gas to escape from the alkali washing tower when the pH value of the neutralized alkali solution is close to 7, and is discharged into the atmosphere with the flue gas, so The exhausted flue gas is difficult to meet environmental protection standards. Third, the process cannot by-produce high-purity silica powder

Method used

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  • Resourceful and environment-friendly treatment system for chlorine-containing organic waste gas and waste liquid of organosilicone

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Embodiment

[0014] Embodiment: An environmental protection treatment system for organosilicon and chlorine-containing organic waste gas and waste liquid recycling. The incinerator 1 is connected to the two-stage fire tube waste heat boiler 2, and the left end of the two-stage fire tube waste heat boiler 2 is dedusted by the ceramic membrane through the pipeline. The lower end of the two-stage fire tube waste heat boiler 2 is connected to the 1# replacement bin 5; the lower end of the 1# replacement bin 5 is connected to the 1# ash storage bin 6, and the 1# ash storage bin 6 is connected to the neutralization tank 29; The upper end of the ceramic membrane dust collector 3 is connected to the upper end of the graphite quenching tower 7, the lower end of the ceramic membrane dust collector 3 is connected to the ash bin 4, the lower end of the ash bin 4 is connected to the 2# replacement bin 5-1, and the 2# replacement The lower end of the bin 5-1 is connected to the 2# ash storage bin 6-1, an...

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Abstract

The invention discloses a resourceful and environment-friendly treatment system for chlorine-containing organic waste gas and waste liquid of organosilicone, and belongs to the field of waste resourceful treatment, purification and environment protection. The resourceful and environment-friendly treatment system is composed of an incineration section, a waste heat recovery section, a silicon dioxide powder recovery section, a diluted hydrochloric acid recovery section and a tail gas environment-friendly up-to-standard discharge section. The incineration section is connected with the waste heatrecovery section. The silicon dioxide powder recovery section is arranged behind the waste heat recovery section and is connected with the diluted hydrochloric acid recovery section. The tail gas environment-friendly up-to-standard discharge section is arranged behind the diluted hydrochloric acid recovery section. Generated flue gas is environment-friendly and reaches standards after being treated by the tail gas environment-friendly up-to-standard discharge section, the flue gas is discharged into air through a chimney, and resourceful utilization of chlorine-containing organic waste gas and low-boiling-point polymer waste liquid of organosilicone is achieved; and recovery of diluted hydrochloric acid, silicon dioxide powder and other chemical intermediates is achieved while flue gas waste heat recovery is achieved. The system is compact in layout and small in occupied area, and equipment operation sustainability is high.

Description

technical field [0001] The invention belongs to the field of waste gas resource treatment and environmental protection, and in particular relates to an organic silicon chlorine-containing organic waste gas and waste liquid resource treatment system for environmental protection. Background technique [0002] my country's organosilicon material industry is in a stage of rapid development. Because organosilicon materials have excellent properties such as high temperature resistance, moisture resistance, insulation, weather aging resistance, and physiological inertia, organosilicon materials are closely related to various fields of the national economy and are widely used in Textile, electronics, petroleum, chemical industry, light industry, construction, metallurgy, machinery, military industry, office equipment, transportation, medicine, food processing and daily chemical industry play an increasingly important role in the optimization and upgrading of high technology and indust...

Claims

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Application Information

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IPC IPC(8): F23G7/06F23G7/04F22B1/18F23J15/04F23J15/06
CPCF22B1/1892F23G7/04F23G7/06F23J15/04F23J15/06F23G2209/101F23G2209/14F23J2215/10Y02E20/30
Inventor 余传林关小川张翔武王祺李书兵张佳兴周强高英赵广播孙绍增程乾坤余瀚坤宋爱军余世玉张杰葛奡
Owner 大连科林能源工程技术开发有限公司
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