Method for removing carbon black and high polymer in preparation of acetylene by cracking natural gas with plasma

A plasma and natural gas technology, applied in the direction of adsorption purification/separation, organic chemistry, etc., can solve the problems of large reaction gas resistance, poor removal effect, high device investment, etc., achieve low gas resistance, reduce the number of treatments, and meet process requirements Effect

Active Publication Date: 2012-10-17
SOUTHWEST RES & DESIGN INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The carbon black produced in the production process of acetylene has the characteristics of large dispersion, light density, small particles, and poor hydrophilicity. The existing processes for removing carbon black and polymers mainly include filtration, normal temperature water washing, and multi-stage electrolysis. Dust removal method, filtration method is generally used in small-scale devices, and has a large resistance to the reaction gas and poor removal effect; normal temperature water washing method also has poor removal effect and high energy consumption due to the poor hydrophilicity of carbon black; multi-stage electrostatic precipitator The method can remove the carbon black in the reaction gas to 10mg / Nm 3 Below, but it has disadvantages such as complex process, high equipment investment and large energy consumption
The content of carbon black and high polymer produced in the process of plasma cracking natural gas to acetylene is usually greater than 30g / Nm 3 , much higher than other acetylene production methods, if the existing process cannot effectively and economically remove it below the content required by the process

Method used

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  • Method for removing carbon black and high polymer in preparation of acetylene by cracking natural gas with plasma
  • Method for removing carbon black and high polymer in preparation of acetylene by cracking natural gas with plasma
  • Method for removing carbon black and high polymer in preparation of acetylene by cracking natural gas with plasma

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Effect test

Embodiment 1

[0022] Embodiment 1: as figure 1 Shown, a kind of method that removes carbon black and high polymer in plasma cracking natural gas to produce acetylene comprises the following steps:

[0023] A, cracked gas from gas-making process (carbon black particle content 30g / Nm 3 ) enters the feed end at the bottom of the hot water scrubber 1, and after being sprayed and washed with hot water and adsorbed by the porous filler, enters the feed end of the electrostatic precipitator 2 from the discharge end at the top of the hot water scrubber 1 through a pipeline;

[0024] B. After being treated by the electrostatic precipitator 2 (the electric precipitator voltage is 50kV), the gas enters the feed end at the bottom of the washing tower 3 through the pipeline, and passes through the cooling water (the temperature is 40°C and the pressure is 1mH) 2 O) After spraying and cooling to about 40°C, it enters the feed end of the gas cabinet.

[0025] The temperature of the hot water for sprayin...

Embodiment 2

[0026] Embodiment 2: as figure 1 Shown, a kind of method that removes carbon black and high polymer in plasma cracking natural gas to produce acetylene comprises the following steps:

[0027] A, cracked gas from gas-making process (carbon black particle content 50g / Nm 3 ) enters the feed end at the bottom of the hot water scrubber 1, and after being sprayed and washed with hot water and adsorbed by the porous filler, enters the feed end of the electrostatic precipitator 2 from the discharge end at the top of the hot water scrubber 1 through a pipeline;

[0028] B. After being treated by the electrostatic precipitator 2 (the electric precipitator voltage is 60kV), the gas enters the feed end at the bottom of the washing tower 3 through the pipeline, and passes through the cooling water (the temperature is 30°C and the pressure is 1mH) 2 O) After spraying and cooling to about 40°C, it enters the feed end of the gas cabinet.

[0029] In the step A, the temperature of the hot wa...

Embodiment 3

[0030] Embodiment 3: as figure 1 Shown, a kind of method that removes carbon black and high polymer in plasma cracking natural gas to produce acetylene comprises the following steps:

[0031] A. Cracked gas from gas-making process (carbon black particle content 30~50g / Nm 3 ) enters the feed end at the bottom of the hot water scrubber 1, and after being sprayed and washed with hot water and adsorbed by the porous filler, enters the feed end of the electrostatic precipitator 2 from the discharge end at the top of the hot water scrubber 1 through a pipeline;

[0032] B. The gas processed by the electrostatic precipitator 2 enters the feed end at the bottom of the washing tower 3 through the pipeline, and is cooled by water (the temperature is 25°C and the pressure is 1mH 2 O) After spraying and cooling to about 35°C, it enters the feed end of the gas cabinet.

[0033] The temperature of the hot water for spray washing in the step A is 90°C. The porous filler is porous alumina ...

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Abstract

The invention discloses a method for removing carbon black and high polymer in the preparation of acetylene by cracking natural gas with plasma. The method comprises the following steps: 1) the cracked gas from a gas generating process enters a hot water washing tower from a bottom charge end, performs the spray washing of hot water with the temperature of 60-130 DEG C and the absorption of porous packing and is discharged from a discharge end on the top of the hot water washing tower; 2) the gas leaving the hot water washing tower enters a single-stage electrostatic precipitator to perform single-stage electrostatic precipitation treatment; and 3) the treated gas enters a washing tower from a bottom charge end, performs the spray cooling of water with the temperature of 20-40 DEG C and enters a gas holder for the post-treatment. By using the method, the carbon black and high polymer in the raw acetylene feed gas can be removed more thoroughly, the technological requirement of the preparation of acetylene by cracking natural gas with plasma can be satisfied; and the loss of acetylene can be reduced and the packing can be reused.

Description

technical field [0001] The invention relates to a method for removing carbon black and high polymers, in particular to a method for removing carbon black and high polymers in acetylene produced by plasma cracking natural gas. Background technique [0002] Acetylene is an important raw material in the organic chemical industry and a high calorific value fuel with special uses. As the price of petroleum and petroleum products continues to rise in the international market, acetylene produced from natural gas will become a substitute for petroleum products on a large scale. [0003] Acetylene production methods mainly include calcium carbide acetylene method, hydrocarbon cracking method, and direct production of acetylene from coal. The traditional calcium carbide method requires a large investment in equipment and has serious problems of repeated pollution. In developed countries, it has long been replaced by the process of producing acetylene from natural gas. At present, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/24C07C7/12C07C7/13
Inventor 毛震波邱传珪曾健吴路平古共伟贾绘如
Owner SOUTHWEST RES & DESIGN INST OF CHEM IND
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