Technique for producing acetylene gas by dry method

An acetylene gas and process technology, which is applied in the field of dry production of acetylene gas, can solve problems such as dissolution loss, and achieve the effects of reducing drying, high yield and reducing equipment investment.

Active Publication Date: 2008-01-09
SHANDONG XINLONG TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The calcium carbide slurry produced by this method has a water content of 90%, and the heat of reaction is taken away by the slurry water, resulting in a dissolution loss of nearly 1%, and every feeding needs to be replaced, which will drain the acetylene in the bucket and cause additional loss

Method used

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  • Technique for producing acetylene gas by dry method

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Embodiment 1

[0031] Embodiment 1, a kind of technique of dry method production acetylene gas, production technique comprises the following steps:

[0032] a. After rough crushing and fine crushing, the massive calcium carbide becomes particles with a particle size of less than 70mm, and then after electromagnetic iron removal, it is transported to the coarse material bin 2 by a belt conveyor;

[0033] b. The calcium carbide particles in the coarse feeder 2 are sent to the crusher 4 for pulverization through the centrifugal feeder 3, and the calcium carbide particles are pulverized, and the crushed calcium carbide particles are transported to the rotary screen filter 6 through the bucket elevator 5 for filtration. Calcium carbide powder less than 7mm after filtering enters the silo 7. When the silo 7 is full, the calcium carbide powder overflows to the fine silo 21, and the calcium carbide powder in the fine silo 21 enters through the bucket elevator 5 and the rotary sieve filter 6. The cal...

Embodiment 2

[0041] Embodiment 2, a kind of technique of dry production acetylene gas, production technique comprises the following steps:

[0042] a. After coarse crushing and fine crushing, the massive calcium carbide becomes particles with a particle size of less than 50mm, and then after electromagnetic iron removal, it is transported to the coarse material bin 2 by a belt conveyor;

[0043] b. The calcium carbide particles in the coarse feeder 2 are sent to the crusher 4 for pulverization through the centrifugal feeder 3, and the calcium carbide particles are pulverized, and the crushed calcium carbide particles are transported to the rotary screen filter 6 through the bucket elevator 5 for filtration. Calcium carbide powder less than 3mm after filtering enters the silo 7. When the silo 7 is full, the calcium carbide powder overflows to the fine silo 21, and the calcium carbide powder in the fine silo 21 enters through the bucket elevator 5 and the rotary sieve filter 6. The calcium c...

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Abstract

A process for producing ethyne by dry method is carried out by: mixing water with calcium acetylide powder in proportion of 1.1-1.9:1, and spraying water on calcium acetylide powders in ethyne generator and hydrolyzing to generate ethyne. Calcium acetylide rate at outlet of residual slag machine is 99.5-99.85 wt%, ethyne recovery rate reaches to 98.5 wt%, water content of calcium acetylide slag is 4-12 wt%, reactive temperature is set between 87-93 deg.C and water content is 75%. It's safe, continuous, simplified and cheap.

Description

technical field [0001] The invention relates to a process for producing acetylene gas by a dry method, which belongs to the technical field of chemical industry. Background technique [0002] At present, the domestic PVC production industry generally uses wet-process acetylene generators. Wet-process acetylene production uses more than 17 times the theoretical amount of water to decompose calcium carbide to generate acetylene gas. The calcium carbide slurry produced by this method has a water content of 90%, and the heat of reaction is taken away by the slurry water, causing a dissolution loss of nearly 1%, and every feeding needs to be replaced, which will drain the acetylene in the bucket and cause additional loss. Every ton of PVC produced will produce 15 tons of sewage containing a lot of sulfur and phosphorus, only a small part of which can be recycled. The calcium carbide slurry becomes a filter cake with a water content of about 35% after pressure filtration, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10H1/12C07C11/24
Inventor 李发曾李耀文杨秀玲常青
Owner SHANDONG XINLONG TECH
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