A device and method for removing volatile organic compounds in emulsion

An organic compound and volatile technology, applied in the field of green petrochemical industry, can solve the problems that affect the production capacity of equipment, lack of reference, and a large number of skinning, so as to reduce the risk of foaming, high processing efficiency, and reduce the effect of skinning

Active Publication Date: 2020-11-24
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is prone to foaming during the stripping process, and is prone to produce a large amount of skinning, which requires shutdown and cleaning, which affects the production capacity of the equipment.
Moreover, the patent does not elaborate on the structure of the evaporator, so it is not referenced

Method used

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  • A device and method for removing volatile organic compounds in emulsion
  • A device and method for removing volatile organic compounds in emulsion
  • A device and method for removing volatile organic compounds in emulsion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] A device for removing volatile organic compounds in emulsion (such as figure 1 shown), including vapor-liquid mixer 1 and de-VOC tower 2;

[0056] The gas-liquid mixer 1 is a multi-layer casing structure (such as figure 2 As shown), it includes an inner film sleeve 11 and an outer membrane sleeve 12 coaxially arranged; the inner membrane sleeve 11 is provided with a hot water inlet 13 and a hot water outlet 14; the outer membrane sleeve 12 is a vapor-liquid mixing member, and its The bottom is provided with two inlets, respectively the emulsion inlet 7 and the water vapor inlet 8, and the outlet of the upper part, that is, the outlet of the vapor-liquid mixer 1, is connected with the feed port 3 positioned at the top of the VOC removal tower 2; the feed port 3 (such as image 3 Shown) is located at the 1 / 4 height position of the upper part of the tower body, tangentially downward 10° along the inner wall of the tower.

[0057] The tower body of the VOC removal tower ...

Embodiment 2

[0063] A device for removing volatile organic compounds in emulsion, the difference from Example 1 is:

[0064] Vapor-liquid mixer 1 (such as Figure 6 Shown) is a tubular structure with multi-layer orifice plate 19, the bottom is provided with two inlets, respectively emulsion inlet 7 and water vapor inlet 8, the upper outlet is the outlet of the vapor-liquid mixer 1 and the VOC removal tower 2 The feeding port 3 on the top is connected; the number of holes in the bottom orifice plate 19-1 is 1, and the ratio of the hole area to the cross-sectional area of ​​the orifice plate is 0.8:1; the number of holes in the remaining orifice plates 19-2 is 6, and the hole The ratio of the area to the cross-sectional area of ​​the orifice plate is 0.6:1.

[0065] The inner diameter ratio of the upper part of the VOC removal tower body to the lower part is 2:1; there are 7 layers of sieve plate 6 in the VOC removal tower 1, and the aperture is 2.2 cm; the height of the overflow weir 16 is...

Embodiment 3

[0067] A method for removing volatile organic compounds in emulsion: adopt embodiment 1 device (removing VOC tower 2 size ), the steps include:

[0068] 1) 20,000kg of styrene-acrylic emulsion (flow rate of 5000kg / h, viscosity of 800mpa·S) and 85°C saturated water vapor (flow rate of 900kg / h) respectively enter the outer membrane casing of the vapor-liquid mixer 1 through the emulsion inlet 7 and the water vapor inlet 8 Mix in the tube 12 to form a uniform vapor-liquid mixture; at the same time, hot water circulates in the inner membrane casing 11 through the hot water inlet 13 and the hot water outlet 14, and the hot water circulation temperature is 52°C;

[0069] 2) In the de-VOC tower 2, the vacuum degree is 7Kpa through the vacuum pumping port 10, and the pumping capacity is 3000m3 / h. The baffle plate 18 blocks the foam in the tower from entering the vacuum system along the vacuum pumping line; the vapor-liquid mixture is fed from the upper part of the de-VOC tower 2 Por...

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PUM

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Abstract

The invention discloses a device and a method for removing VOC (voltaic organic compound) in an emulsion. The device body comprises a steam and liquid mixer and a VOC removal tower, wherein the steamand liquid mixer is of a multi-layer sleeve tube type structure or a tube type structure with a perforated plate; a tower body of the VOC removal tower is separated into an upper part and a lower part, the inner diameter of the upper part is greater than the inner diameter of the lower part, the upper part is provided with a rotary spraying device at the top part of the VOC removal tower, and thelower part is provided with a gas distributor at the bottom part of the VOC removal tower; a screen plate is arranged between the rotary spraying device and the gas distributor. The method using the device to remove the VOC in multiple emulsions has the advantages that the foaming and crusting are avoided in the treatment process; especially for hydrophobic VOC of BA, St, benzene series and the like, the continuous and high-efficiency effects are realized, and the like; the method has great application and popularization prospect in the fields of ultralow VOC, clean-odor emulsions.

Description

technical field [0001] The invention belongs to the field of green petrochemical industry and relates to a device and method for removing volatile organic compounds in emulsion. Background technique [0002] With the improvement of material conditions and the enhancement of environmental protection awareness, indoor air pollution has attracted increasing attention. In the process of production and use, interior wall paint will directly or indirectly release a certain amount of volatile organic compounds (VOC), causing indoor air pollution and affecting people's normal work and life. The Chinese national standard GB 18582-2008 "Limits of Hazardous Substances in Interior Decoration Materials and Interior Wall Coatings" defines VOC as "any organic compound with an initial boiling point lower than or equal to 250°C under a standard pressure of 101.3kPa". Countries around the world and international mainstream environmental protection standard certification systems have also for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D1/14B01D1/00B01D19/00B01D19/02
CPCB01D1/00B01D1/14B01D19/00B01D19/001B01D19/02
Inventor 马磊贾元峰杨建强韩晶李树森乔义涛孙家宽
Owner WANHUA CHEM GRP CO LTD
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