A method and device for preventing accumulation and explosion of hydrocarbon compounds

A compound and hydrocarbon technology, applied in the field of coal-to-synthesis ammonia air separation system, can solve the problems of long maintenance time and great impact on production line operation, achieve good economic benefits, solve the bottleneck of equipment explosion affecting the normal production of the system, and avoid equipment explosion. Dangerous effects of explosion accidents

Active Publication Date: 2018-02-23
TIANJI COAL CHEM IND GROUP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Due to the long maintenance time, it has a great impact on the operation of the entire production line

Method used

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  • A method and device for preventing accumulation and explosion of hydrocarbon compounds
  • A method and device for preventing accumulation and explosion of hydrocarbon compounds

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Experimental program
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Embodiment

[0020] When the system of the present invention is working, the air is successively filtered by a filter, compressed by an air compressor, cooled and defogged by a water cooler, condensed water is removed by an ammonia evaporator, moisture and carbon dioxide are removed by an adsorber, and then cooled by a heat exchanger to lower its temperature. To -172 ℃, the pressure reaches 0.55MPa, the air close to the saturated state enters the air separation rectification tower, and the rising gas in the tower is partially condensed for many times and the descending liquid is evaporated for many times through the main cooling evaporator 2. The gas first Rough rectification is carried out in the lower tower 4 of the air separation two-stage rectification tower, and then through the rectification of the upper tower 1 of the air separation two-stage rectification tower, the double high-purity products of oxygen and nitrogen are obtained in the upper tower, that is, in the upper tower The bo...

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Abstract

The invention discloses a method and device for preventing accumulative explosion of hydrocarbon compounds.A liquid oxygen continuous discharge device is arranged at the bottom of an upper tower body of an air separation two-stage rectifying tower, liquid oxygen accounting for 0.1-1.5% of a liquid oxygen product is continuously taken out from the bottom of the upper tower body, and the liquid oxygen is atomized through a liquid oxygen ejector and conveyed into an oxygen product pipeline after being mixed with oxygen.Temperature difference in the liquid oxygen ejector before and after liquid oxygen ejection is smaller than or equal to 4 DEG C, and the temperature after liquid oxygen ejection is larger than or equal to -5 DEG C.The device comprises the liquid oxygen ejector, a liquid oxygen pipeline communicated with the bottom of the upper tower body of the two-stage rectifying tower and the liquid oxygen ejector, a gaseous oxygen pipeline communicated with a gaseous oxygen inlet in the liquid oxygen ejector, and the oxygen product pipeline communicated with an oxygen product outlet in the liquid oxygen ejector.The method and device achieve continuous discharge of acetylene and other hydrocarbon compounds, prevent equipment explosion accidents, can be used for recycling oxygen, and generate economic benefits.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry and relates to an air separation system for ammonia synthesis from coal, in particular to a method and device for preventing equipment explosion accidents caused by the accumulation of acetylene and other hydrocarbon compounds in the air separation rectification system. Background technique [0002] The air separation unit is one of the very important production units in chemical industry, especially in coal chemical enterprises. The safe operation of the air separation unit is a prerequisite for ensuring safe, stable, long-term, and full-load production. In order to ensure the safe production and operation of the air separation unit, it is necessary to reduce and eliminate the accumulation of acetylene and other hydrocarbons in the air separation rectification system, otherwise there may be a danger of equipment explosion accidents. [0003] During the production and operation of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25J3/04
CPCF25J3/04412F25J3/0486F25J2215/02F25J2240/60F25J2245/50
Inventor 陈晓玲丁明公刘金亮常永宏
Owner TIANJI COAL CHEM IND GROUP
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