Apparatus and method for treating exhaust gas in the production of PVC gloves

Abstract

The invention discloses an apparatus and method for treating exhaust gas in the production of PVC gloves. The apparatus includes an adsorption canister, a layering tank and a distillation column, and further comprises a waste heat refrigeration device and an atomized condensate separator, which are connected by an exhaust pipe. The exhaust gas outlet of the atomized condensate separator is connected to the adsorption canister; a solvent mixed liquid outlet at the bottom outlet of atomized condensate splitter is connected to the layering tank; an atomized water inlet at the upper part of the atomized condensate separator is connected to the layering tank; the atomized condensate separator and the waste heat refrigeration device in circulation connection by a low temperature cold water pipe. After step by step condensation by the atomized condensate splitter, most of the solvent in the exhaust gas can be recovered, so as to reduce the load on the activated carbon adsorption canister adsorption system, reduce environmental pollution, achieve the recycling utilization of heat, atomized water, desorption water and solvent.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and relates to a waste gas treatment device and method in the production process of PVC gloves. Background technique [0002] In the production process of PVC gloves, PVC powder is mixed with solvent oil, plasticizer and other substances and then baked at high temperature on the production line, emitting a large amount of oily fume with peculiar smell. The main components are D series solvent oil, plasticizer, etc. The exhaust gas is usually above 120°C, and it is directly discharged into the atmosphere, causing serious air pollution, affecting the production and life of employees and surrounding residents. [0003] At present, most factories are collected by the gas collection system and then removed by electrostatic adsorption after simple condensation. This traditional treatment method usually first directly cools the waste gas at 120°C to about 70°C, and then captures the waste ga...

AI Technical Summary

Problems solved by technology

[0002] In the production process of PVC gloves, PVC powder is mixed with solvent oil, plasticizer and other substances and then baked at high temperature on the production line, emitting a large amount of oily fume with peculiar smell. The main components are D series solvent oil, plasticizer, etc. and a small amount of dust. The exhaust gas is usually discharged at a temperature above 120°C. It is directly discharged into the atmosphere and causes serious air pollution, affecting the production and life of employees and surrounding residents.

[0003] At present, most factories are collected by the gas collection system and then removed by electrostatic adsorption after simple condensation. This traditional treatment method usually first directly cools the waste gas at 120°C to about 70°C, and then captures the waste gas in the waste gas through electrostatic discharge. Oil mist can recover part of the plasticizer and solvent oil. The solvent recovery rate of this method is less than 50%, and a large amount of circulating water is consumed to cool the high-temperature exhaust gas. Since the exhaust gas contains solvent oil with a flash point of 60-70°C, In the process of using static electricity, it is easy to catch fire or even explode

Due to the low removal rate, the exhaust gas has a strong odor, and the recovered mixed liquid is dark brown, which can only be used as fuel for cheap takeaway waste oil, wasting precious organic resources

[0004] Chinese utility model patent (authorized announcement number CN203469757U, authorized announcement date 2014.03.12) discloses an organic waste gas recovery and recycling device, which can completely absorb and recycle organic waste gas for production, and heat the desorbed waste water into steam for recycling , but the solvent recovered by the recovery unit without rectification treatment is a waste water mixture, and the purity is not high

Chinese utility model patent (publication number 201064702, publication date 2008.05.28) discloses a variety of organic waste gas treatment devices that can be recycled without secondary pollution. The device includes waste gas collection devices, waste gas filtering devices, fans, and waste gas temperature adjustments. Device, cooling tower, water pump, adsorption and desorption device, heat exchange device, stratification device, rectification device, the device makes full use of high-temperature exhaust gas and desorption mixed steam waste heat to heat clean gas and pre-rectification solution through multi-stage heat exchange device , effectively reduce the operating cost of the device, after rectification, the residual liquid is heated with steam to form secondary steam, which reduces secondary pollution and improves the recovery rate, but there is no detailed description of the exhaust gas temperature adjustment device in this device

Images