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Styrene-butadiene latex degassing device and degassing method

A technology of styrene-butadiene latex and degassing device, which is applied in separation methods, liquid degassing, chemical instruments and methods, etc., can solve the problems of large fluctuation of product quality, difficult process control, long degassing time, etc. Volume and processing speed, control of liquid level, and the effect of increasing yield

Active Publication Date: 2021-06-15
JINING MING SHENG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the degassing equipment and process of styrene-butadiene latex in the prior art have problems such as long degassing time, large fluctuations in product quality, high energy consumption, and difficult process control.

Method used

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  • Styrene-butadiene latex degassing device and degassing method
  • Styrene-butadiene latex degassing device and degassing method
  • Styrene-butadiene latex degassing device and degassing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] refer to figure 1 with figure 2 , a styrene-butadiene latex degassing device, comprising a degassing tower 1, a tower top vacuum system communicated with the tower top gas phase outlet 5 at the top of the degassing tower 1, and a tower bottom latex outlet 4 communicating with the degassing tower 1 bottom The tower kettle vacuum system;

[0038] The main body of the degassing tower 1 is a cylindrical hollow structure. There are six vertical trays 3 fixed to the inner wall of the degassing tower 1. The diameter of the trays 3 is consistent with the inner diameter of the degassing tower 1. A plurality of steam outlets 301, steam outlets 301 are rectangular, opposite sides are provided with a pair of upwardly bent elongated tray openings 302, a gap is opened on one side of the tray 3, and the gaps of adjacent trays are arranged alternately. A steam inlet 2 is provided on the side wall of the degassing tower below the lowermost tray 3, and a latex inlet 101 is provided on...

Embodiment 2

[0050] An anti-flooding baffle 9 is arranged below the gas phase outlet 6 of the liquid seal tank to prevent liquid flooding. The anti-flooding baffle 9 forms an included angle of 45° with the vertical centerline of the liquid-sealed tank 10 . Others are the same as embodiment 1.

Embodiment 3

[0052] The vacuum pump 16 at the top of the tower and the vacuum pump 7 at the bottom of the tower are respectively connected with the differential pressure interlocking control device. The pressure difference between the top and the bottom of the tower is monitored and automatically adjusted through the differential pressure interlock control device. Others are the same as embodiment 1.

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Abstract

The invention discloses a styrene-butadiene latex degassing device which comprises a degassing tower, a tower top vacuum system and a tower kettle vacuum system, the tower top vacuum system comprises a condenser gas phase inlet, a tower top condenser and a liquid receiving tank which sequentially communicate through a pipeline, the condenser gas phase inlet communicates with a tower top gas phase outlet, and the tower top condenser is connected with a tower top vacuum pump; and the tower kettle vacuum system comprises a liquid seal tank and a tower bottom vacuum pump communicating with a gas phase outlet of the liquid seal tank. The VOC removal efficiency and the latex yield are increased by controlling the pressure difference between the tower top vacuum pump and the tower bottom vacuum pump and maintaining the pressure in the degassing tower, and the situation that the temperature of steam at the bottom of the tower is increased and latex crusting is avoided due to the fact that the system resistance is too large can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of styrene-butadiene latex production, in particular to a styrene-butadiene latex degassing device and a degassing method. Background technique [0002] SBR latex is generally used in papermaking, coating and other processes. It is produced by copolymerization of butadiene and styrene to form carboxylated styrene-butadiene latex through subsequent processing. A small amount of butadiene and styrene raw materials are usually dissolved in the prepared styrene-butadiene latex after the reaction, and the residual monomers need to be removed through a degassing process. The degassing tower removes the residual monomers in the styrene-butadiene latex generally by feeding saturated steam, and then adsorbing and removing styrene and butadiene during the steam volatilization process, so as to separate and remove the residual monomers from the styrene-butadiene latex. [0003] CN211536643U discloses a kind of degassi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/00
CPCB01D19/00
Inventor 施晓旦张太远
Owner JINING MING SHENG NEW MATERIALS CO LTD
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