Method and device for separating condensable component liquid drops in gas-phase medium

A gas phase and medium technology, applied in separation methods, combined devices, and dispersed particle separation, can solve problems such as high failure rate, poor treatment effect, and inability to ensure complete condensation, achieving good stability, eliminating supersaturation, good quality effect

Active Publication Date: 2020-05-08
南京圣卡孚科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gravity sedimentation can generally only deal with droplets with a particle size of 50-100 μm or more; the inertial collision method and centrifugal separation method can handle smaller droplet sizes, but require more power to provide a pressure head; For fine mist droplets and microfoam, it is necessary to try to make them aggregate to form larger particles, such as using fiber filters and electrostatic mist eliminators, but it cannot guarantee complete condensation, and the treatment effect will change with the accumulation of liquid phase and condensation nuclei on the surface of the device Poor, relatively high failure rate

Method used

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  • Method and device for separating condensable component liquid drops in gas-phase medium
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  • Method and device for separating condensable component liquid drops in gas-phase medium

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Example 1. Separation of droplets and droplets in flue gas after desulfurization

[0048] A method and device for separating droplets of condensable components in a gas phase medium, used for separating droplets and droplets from flue gas after wet desulfurization. After the flue gas is sprayed, it is wrapped with mist, droplets and trace solid particles, which should be separated to meet the needs of emission reduction. The separation method needs to use a demisting device composed of microporous material 2, and the microporous material 2 is a hollow plate microfiltration membrane, specifically as figure 2 shown.

[0049] The demisting device is set on the top of the closed device 1, the closed device is a desulfurization tower, coupled with the desulfurization tower to form an operating unit, the demisting device is composed of a plurality of microporous materials 2 connected to each other, that is, a hollow plate microfiltration membrane . The hollow plate microf...

Embodiment 2

[0056] Example 2. Recovery of methanol droplets in dimethyl ether scrubbing tail gas

[0057] A method and device for separating condensable component droplets in a gas phase medium, which are used to recover methanol droplets from dimethyl ether scrubbing tail gas. The separation method needs to use a closed device with a built-in microporous material 2, and the microporous material 2 is a tubular ultrafiltration membrane, specifically as image 3 shown.

[0058] In this example, the scrubbing tail gas is produced during the process of producing dimethyl ether by methanol vapor phase dehydration, and the weight ratio of the main components is roughly: 10.6% methanol, 3.5% dimethyl ether, 31% CO, 21.8% CO 2 , 7% hydrogen, 4.3% water and 21.8% CH 4 etc., the temperature is about 40°C, and the gauge pressure is about 1.1MPa. Methanol is a supersaturated condensable component under this working condition, which can be separated and recovered.

[0059] A microporous material 2...

Embodiment 3

[0066] Embodiment 3. Eliminate maleic anhydride supersaturation and acid mist in maleic anhydride synthesis gas

[0067] A method and device for separating condensable component droplets in a gas phase medium, used for eliminating supersaturation and acid mist of maleic anhydride synthesis gas in the production of maleic anhydride. The separation method needs to use a closed device 1 with a built-in microporous material 2, and the microporous material 2 is a tubular microfiltration membrane, specifically as image 3 shown.

[0068] In this embodiment, after cooling and preliminary gas-liquid separation, the maleic anhydride synthesis gas has a temperature of 63-65° C. and a gauge pressure of 0.1-0.12 MPa. It contains a certain amount of maleic anhydride droplets, which need to be separated and recovered.

[0069] The microporous material 2 is arranged in the closed device 1, that is, the tubular microfiltration membrane, and the tubular microfiltration membrane separates the ...

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Abstract

The invention relates to a method and a device for separating condensable component liquid drops in a gas-phase medium. According to the method, mixed gas containing condensable components and fog drops and droplets thereof flows through a microporous material compatible with the condensable components and having an infiltrated surface in a turbulent flow state, and the fog drops and the dropletsof the condensable components stay on the surface of the microporous material and are transferred to the other side of the material along with pressure difference. The device comprises sealing equipment, wherein the interior of the sealing equipment is divided into a gas side and a liquid side by a microporous material, the gas side is provided with an inlet and an outlet, a gas phase medium and gas flow obtained after liquid drops are separated pass through the inlet and the outlet respectively, and the liquid side is provided with at least one pipeline opening for introducing a infiltrationliquid, discharging a liquid formed by liquid drop accumulation, and maintaining the working state that the working pressure P2 of the liquid side is lower than the working pressure P1 of the gas side. With the method and the device, liquid drops and droplets, especially difficult-to-remove fine liquid drops, in gas can be removed, so that the degree of supersaturation is deeply eliminated.

Description

technical field [0001] The invention relates to the technical field of gas or vapor separation methods, in particular to a method and device for separating condensable component droplets in a gas phase medium. [0002] technical background [0003] In chemical industry, coking, metallurgy, power generation, heating and other fields, there are many requirements for demisting in gas use, chemical gas phase reaction, distillation and condensation, and other mass transfer and transportation processes; at the same time, when supersaturated gas is contained, it is also required It is often necessary to reduce the saturation; in addition, especially in the treatment of tail gas and the recovery of VOC components, there are also technological requirements for removing traces of mist and microfoam and reducing saturation. [0004] In the unit operation where the gas-liquid two-phase coexists, the diameter of the dispersed droplets in the gas is about 0.1-5000 μm. Some of these drople...

Claims

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Application Information

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IPC IPC(8): B01D50/00
CPCB01D50/00
Inventor陆剑鸣陈忠程新华李保国徐丽燕
Owner南京圣卡孚科技有限公司