Deaeration device and method for carboxyl styrene-butadiene latex

Abstract

The invention discloses a carboxyl styrene-butadiene latex degassing device and method. The degassing device comprises a degassing tower, a heat exchanger, a heater, a catalytic reactor, a booster fanand a desuperheating humidifier. The degassing method comprises the following steps of: degassing residual volatile organic compounds in latex through a degassing tower; after converting a waste gasheat exchanger, a heater and a catalytic reactor enriched in volatile organic compounds into purified gas, performing desuperheating and humidification through a booster fan and a desuperheating humidifier, and circulating the purified gas back to the degassing tower for recycling. The degassing production is continuous; During degassing, steam and nitrogen need not be consumed and the system neednot be vacuumized. The invention thoroughly solves the gel problem caused by the contact of high-temperature steam and latex when steam degassing is adopted; The heat energy of residual VOCs in latexis fully recovered and utilized. VOCs-containing waste gas generated in the degassing process is purified synchronously, no further treatment measures are needed, and the degassing process is more environment-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.

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