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Bio-ethylene caustic wash tower

A technology of ethylene alkali washing tower and alkali washing tower, which is applied in the field of biological ethylene alkali washing tower, can solve the problems of uneven spraying, blocking tower of alkali washing tower, intensified polymerization of aldehydes, etc., and achieves improved removal efficiency, gas-liquid contact Fully and reduce the effect of aggregation

Inactive Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the problem of uneven spraying caused by the design problem of the alkali washing tower in the past in the production of bio-ethylene, which makes the local strong alkaline, causes the polymerization of aldehydes to intensify, and the tower blockage of the alkali washing tower problem, to provide a new biological ethylene alkali scrubber

Method used

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  • Bio-ethylene caustic wash tower
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  • Bio-ethylene caustic wash tower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 , The reactor effluent enters the alkali washing tower from the lower part of the alkali washing tower, and the composition (weight %) of the reactor effluent is: bioethylene 96.69, ethane 0.24, acetaldehyde 0.17, carbon dioxide 0.05, and other 2.85. The flow rate is 4 tons / hour, and the feed temperature is 42°C. The lower part of the alkali washing tower also has the following image 3 Internal components shown. The inner member of the lower section is composed of packing units whose exterior is circular and whose internal passages are regular triangles. The number of packing units is 7, D2 = 0.5D1, d2 = 0.5d1, and the arithmetic average cross-sectional area of ​​the internal passages of all packing units is the cross-sectional area of ​​the tower. 75%; the outer circulating liquid in the lower section of the alkali washing tower is sprayed with 5 layers, and the installation is as follows figure 2 The nozzles shown are installed at three angles of...

Embodiment 2

[0019] The alkali washing process is the same as in Example 1, and the reactor effluent composition (weight %) is: bioethylene 96.69, ethane 0.24, acetaldehyde 0.17, carbon dioxide 0.05, and others 2.85. The flow rate is 4 tons / hour, and the feed temperature is 42°C. Using the alkali washing tower of the present invention, the outer circulating liquid in the lower section is sprayed into three layers, and the installation angles of the nozzles are 0°, 120°, and 180°. The internal components in the lower section are composed of The outside is circular, and the internal channel is composed of regular pentagonal packing units. The number of packing units is 4, D2=0.75D1, d2=075d1, and the arithmetic average cross-sectional area of ​​the internal passages of all packing units is 45% of the cross-sectional area of ​​the tower; The upper section is filler. The carbon dioxide removal rate of the alkali washing tower is 99.0%, and the carbon dioxide removal rate of the industrial devi...

Embodiment 3

[0021] The alkali washing process is the same as in Example 1, and the reactor effluent composition (weight %) is: bioethylene 96.69, ethane 0.24, acetaldehyde 0.17, carbon dioxide 0.05, and others 2.85. The flow rate is 4 tons per hour, and the feed temperature is 42°C. Using the alkali washing tower of the present invention, the outer circulating liquid in the lower section is sprayed into two layers, and the installation angles of the nozzles are 30° and 150°. Shape, the inner channel is also composed of circular packing units, the number of packing units is 6, D2=D1, d2=d1, the arithmetic mean cross-sectional area of ​​the internal passages of all packing units is 25% of the cross-sectional area of ​​the tower; the upper section is packing. The carbon dioxide removal rate of the alkali washing tower is 99.6%, and the carbon dioxide removal rate of the industrial device is 95.2%.

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Abstract

The invention relates to a bio-ethylene caustic wash tower and mainly solves the problem in the prior art that nonuniform spray caused by the design of a caustic wash tower in production devices leads to strong basicity of local areas, aggravation of aldehyde polymerization and blocking of the caustic wash tower. The bio-ethylene caustic wash tower adopted in the invention is composed of at least an upper part and a lower part, wherein a separator plate and an external ascension pipe are disposed between the upper part and the lower part; the upper part is a tray-type structure with 1-10 theoretical trays or a filling material; the lower part is a spraying structure containing an inner member. The spraying structure is positioned below the separator plate and over the inner member which is characterized by comprising 1-12 filling material units with the external shape being circular and the internal channel being circular, regular triangle, rectangular or regular polygon or 3-36 saddle-shaped geometric figure filling material units. The technical scheme greatly solves the problem and can be used in the bio-ethylene industrial production device.

Description

technical field [0001] The invention relates to a biological ethylene alkali washing tower. Background technique [0002] Ethylene is a very important petrochemical raw material, and its bulk downstream products mainly include polyethylene, ethylene oxide, ethylene glycol, polyvinyl chloride, styrene, vinyl acetate, etc. [0003] The dehydration of ethanol to ethylene was once the main method of industrial production of ethylene. Since the middle of the last century, due to the rapid development of the petrochemical industry, the cost of producing ethylene from naphtha has been greatly reduced, and the process route of ethanol dehydration to ethylene has been basically replaced by the petroleum-based thermal cracking process route. In recent years, with the sharp rise in oil prices and the reduction in the cost of biomass ethanol, the competitiveness of the ethanol-to-ethylene process has been significantly improved, which has aroused people's attention again. [0004] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/62C07C11/04C07C1/24
Inventor 刘军沈伟朱瑛
Owner CHINA PETROLEUM & CHEM CORP
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