Chlorine-and-silicon-contained waste liquid and gas pollution-free treating method and recycling system thereof

Abstract

The invention provide a chlorine-and-silicon-contained waste liquid and gas pollution-free treating method and a recycling system thereof. The method includes steps as follows: (1) burning; (2) afterheat absorbing; (3) dry method dust removing; (5) quenching; (6) wet method dust removing; (7) absorbing; (8) washing. After the burning of the step (1) and before the afterheat absorbing of the step (2), gas-solid separation is performed on chlorine-and-silicon-contained fuel gases produced by the step (1), and more than 50% of SiO2 solid particles with diameters larger than 10 microns in the fuel gases are separated. The system includes a high-temperature separator connected at an outlet position of an incinerator, and an outlet of the high-temperature separator is connected with an inlet ofa quenching waste heat boiler. By adopting the treating method and the recycling system, the problem of blockage of an afterheat recycling device can be effectively solved, HC1 removing rate can reach 99% after the fuel gases are purified, the amount of dust is smaller than 183mg per cubic meter when the amount of oxygen contained in the fuel gases reaches 7%, removing rate of main harmful organic compositions can reach 99.99%, and fuel gas emission can reach national standard.

Description

technical field [0001] The invention relates to a waste treatment method and a recovery system for its incineration, in particular to a pollution-free treatment method for chlorine-containing silicon-containing waste liquid and waste gas and a recovery system thereof. Background technique [0002] In my country, with the enhancement of people's awareness of environmental protection, the strengthening of policies and regulations, and the rapid construction of a large number of chemical production equipment, the technical requirements for the disposal of hazardous waste are getting higher and higher, and incineration technology has become an important technology in the chemical industry. , The incinerator has become an important part of the chemical plant. [0003] Usually the waste of organic compounds is incinerated at high temperature and converted into CO 2 and H 2 After O, it is discharged to the atmosphere. As long as the temperature in the incinerator is higher than 8...

AI Technical Summary

Problems solved by technology

[0006] The process and device of the above-mentioned chlorine-containing waste liquid waste gas incineration treatment system are only suitable for treating waste liquid waste gas containing chlorine but not containing silicon. Once the waste liquid waste gas contains chlorine compounds and silicon compounds at the same time, a large amount of SiO will be produced after incineration 2 Such solid particles with strong adhesion will cause the waste heat recovery device to block and seriously affect the operation of the entire process equipment.

The present invention proposes a new process method for this problem, which can effectively solve the problem of waste heat recovery device being blocked, and can also concentrate and recycle useful substances for reuse

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