A kind of carboxylated styrene-butadiene latex degassing device and method

Abstract

The invention discloses a carboxylated styrene-butadiene latex degassing device and method. The degassing device includes: a degassing tower, a heat exchanger, a heater, a catalytic reactor, a booster fan and a temperature-reducing and humidifying device; the degassing The method is as follows: degas the residual volatile organic compounds in the latex through a degassing tower, after converting the exhaust gas heat exchanger, heater and catalytic reactor enriched in volatile organic compounds into purified gas, then through the booster fan and temperature reduction and increase After dehumidification and temperature reduction, the humidifier circulates back to the degassing tower for recycling. The degassing production of the present invention is continuous; there is no need to consume steam and nitrogen during degassing, and there is no need to vacuumize the system; it completely solves the gel problem caused by the contact between high-temperature steam and latex when steam degassing is used; the thermal energy of residual VOCs in the latex is obtained Fully recycled; the VOCs-containing waste gas generated during the degassing process has been purified simultaneously, without further treatment measures, and the degassing process is more environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of carboxylated styrene-butadiene latex production, in particular to a carboxylated styrene-butadiene latex degassing device and method for removing residual VOCs in latex. Background technique [0002] In the production process of carboxylated styrene-butadiene latex, the butadiene monomer and styrene monomer input in the latex production cannot fully participate in the polymerization reaction, and the unreacted butadiene monomer and styrene monomer are polymerized together with the latex The reaction kettle is transferred to the downstream degassing device through its own pressure and vacuum, and the butadiene is removed by the principle of flash evaporation, and the styrene is directly stripped with steam to remove the residual styrene (residual volatile organic compounds, Also known as residual VOCs) to pass, in order to improve the removal effect need to heat the latex. Domestic carboxylated styrene-bu...

AI Technical Summary

Problems solved by technology

However, the structure of the degassing tower used in this method is complex, the reliability is poor, and the steam consumption cannot be completely eliminated. At the same time, the degassing process needs to be supplemented by vacuuming, and the power consumption is relatively large.

Images