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Absorbing liquid used in wet dust removal process in high temperature plasma cracking coal to acetylene process and its application

A plasma and absorbing liquid technology, applied in separation methods, gas treatment, dispersed particle separation, etc., can solve problems such as acetylene loss, and achieve the effect of reducing absorption, wide raw materials, and wide sources

Active Publication Date: 2020-09-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the subsequent separation process of acetylene and hydrogen, it is necessary to safely and reliably remove fine particles and tar in the cracked gas. The wet dedusting process will be a relatively better choice, but at the same time, the product acetylene will face the loss of being dissolved in water. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 0.84g of span80, 1.16g of tween60, compound to obtain HLB=8.6 emulsifier, then add 2g of polydimethylsiloxane, viscosity 500mPa·s, and fully mix with water to obtain 200g of absorption liquid.

[0027] Put 200g of the prepared liquid in a small jet bubble reactor for the test of acetylene absorption and coal tar absorption. The temperature is 35°C, the gas flow rate is 200ml / min, the concentration of acetylene is 7%, and the dust removal efficiency is 90%. Under this condition, compared with water absorption, the absorption of acetylene is reduced by 90%, the absorption of tar is increased by 265%, and the time for bubbles to completely disappear is reduced by 99%.

Embodiment 2

[0029] Take 0.91g of span85, 1.09g of tween60, compound to obtain HLB=8.6 emulsifier, then add 2g of polydimethylsiloxane, the viscosity is 500mPa·s, and fully mix with water to obtain 200g of absorption liquid.

[0030] Put 200g of the prepared liquid in a small jet bubble reactor for the test of acetylene absorption and coal tar absorption. The temperature is 35°C, the gas flow rate is 200ml / min, the concentration of acetylene is 7%, and the dust removal efficiency is 90%. Under this condition, compared with water absorption, the absorption of acetylene is reduced by 92%, the absorption of tar is increased by 260%, and the time for bubbles to completely disappear is reduced by 99%.

Embodiment 3

[0032] Take 1.26g of span80, 1.74g of tween60, compound to obtain HLB=8.6 emulsifier, then add 2g of polydimethylsiloxane, viscosity 500mPa·s, and fully mix with water to obtain 200g of absorption liquid.

[0033] Put 200g of the prepared liquid in a small jet bubble reactor for the test of acetylene absorption and coal tar absorption. The temperature is 35°C, the gas flow rate is 200ml / min, the concentration of acetylene is 7%, and the dust removal efficiency is 90%. Under this condition, compared with water absorption, the acetylene absorption is reduced by 87%, the tar absorption is increased by 275%, and the time for bubbles to completely disappear is reduced by 99%.

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Abstract

The invention discloses an absorption liquid for a wet dust removal process in a technology for preparing acetylene from coal by high-temperature plasma cracking. The absorption liquid is prepared bydispersing an emulsifier and a defoaming and foam inhibiting agent into water and compounding the emulsifier and the defoaming and foam inhibiting agent; the emulsifier is one or two from sorbitan fatty acid ester and polyoxyethylene sorbitan fatty acid ester; the defoaming and foam inhibiting agent is polydimethylsiloxane; the emulsifier accounts for 0.1-3wt% of the total mass of the absorption liquid; and the defoaming and foam inhibiting agent accounts for 0.1-2wt% of the total mass of the absorption liquid. The absorption liquid is capable of reducing the dissolution loss of acetylene while increasing the dust and tar removal efficiency and is of great significance to the improvement of the economical efficiency and reliability of the whole technology.

Description

technical field [0001] The invention relates to a wet dust removal process in a high-temperature plasma cracking coal-to-acetylene process, in particular to an absorption liquid in the wet dust removal process. Background technique [0002] my country is a country rich in coal and low in oil, and its dependence on foreign oil has exceeded 60%, which has seriously threatened my country's energy security. Therefore, it is of great practical and far-reaching strategic significance to vigorously develop coal chemical industry and use clean transformation and high-value transformation of coal resources to generate basic chemical raw materials. The existing calcium carbide acetylene industry needs to consume a lot of electric energy and high-quality semi-coke, and emit a lot of waste gas and dust, which seriously restricts its sustainable development. Plasma pyrolysis coal-to-acetylene technology is considered to be a promising green acetylene production technology, which is very...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14B01D50/00
CPCB01D50/00B01D53/1487B01D53/1493B01D2252/504B01D2258/0283
Inventor 刘越施孟帕吴忠标曹爽
Owner ZHEJIANG UNIV
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