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Method and system for supplying air to hydrocyanic acid production system

A production system and a technology for hydrocyanic acid, applied in the field of methods and systems, can solve the problems of inability to determine the exact ratio of air, ammonia and natural gas, large resistance loss of the air conveying system, complicated process routes, etc., so as to reduce the pipeline pressure. The effect of reducing energy loss, reducing energy consumption and simplifying the process route

Inactive Publication Date: 2016-05-04
CHONGQING UNISPLENDOUR INT CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary reciprocating air compressors have unstable air flow, so that the precise ratio of air, ammonia and natural gas cannot be determined during operation, so an air buffer tank device must be installed on the air pipeline
Therefore, the traditional Angle method has problems such as large energy loss, large resistance loss of the air delivery system, and complicated process routes.

Method used

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  • Method and system for supplying air to hydrocyanic acid production system

Examples

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Comparison scheme
Effect test

Embodiment 1

[0045] Select 10000t / year hydrocyanic acid plant to test, present embodiment provides a kind of method for providing air for hydrocyanic acid production system, method is: compress air with centrifugal blower, the air after centrifugal blower compression is mixed with ammonia, It is then mixed with natural gas, and then enters the reactor to generate hydrocyanic acid.

[0046]In the process of synthesizing hydrocyanic acid by the traditional Angle method, the air is transported by a reciprocating compressor with relatively large power. The air temperature after compression is higher than 180°C, and the built-in cooling system of the air compressor is used to cool down, the temperature is controlled at 30-50°C, and the pressure is at 0.2-0.3Mpa. Since the hydrocyanic acid reaction requires a pressure of 0.03-0.06MPa, the compressed air must be decompressed. Ordinary reciprocating air compressors have unstable air flow, so that the precise ratio of air, ammonia and natural gas ...

Embodiment 2

[0049] This example is basically the same as Example 1, except that this example uses a high-pressure multi-stage centrifugal fan to compress the air, mixes the air compressed by the centrifugal fan with ammonia, then mixes it with natural gas, and then enters the reactor to react to generate hydrogen cyanic acid.

[0050] The high-pressure multi-stage centrifugal fan makes the compressed air pressure higher.

Embodiment 3

[0052] Select 10000t / year hydrocyanic acid plant to test, present embodiment provides a kind of method that provides air for hydrocyanic acid production system, compress air with centrifugal blower, described centrifugal blower outlet pressure is 0.06Mpa, after the centrifugal blower is compressed The air is mixed with ammonia, then mixed with natural gas, and then enters the reactor to react to generate hydrocyanic acid.

[0053] Because the reaction pressure requirement for synthesizing hydrocyanic acid is 0.04Mpa, there is a pressure loss during the transportation process, so the outlet pressure is set to 0.06Mpa, if it is lower than 0.06Mpa, the pressure loss through the pipeline will make the reaction pressure less than 0.04Mpa.

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Abstract

The invention provides a method for providing air for a hydrocyanic acid production system and a hydrocyanic acid production system. The method comprises the following steps: compressing air by using a centrifugal fan; mixing the air compressed by the centrifugal fan with ammonia gas, then mixing with natural gas, and then entering a reactor to react so as to produce hydrocyanic acid. The system comprises a natural gas delivery system, an air delivery system, an ammonia gas delivery system and mixed reaction equipment, wherein an outlet of the air delivery system and an outlet of the ammonia gas system are converged to a part and then communicated to an inlet of the mixed reaction equipment; an outlet of the natural gas delivery system is communicated to the inlet of the mixed reaction equipment. According to the method and the system, the centrifugal fan is adopted to replace a reciprocating air compressor to deliver air, so that the problems of the conventional Andrussow method are solved, the energy consumption is reduced, the pipeline damage due to pressing is reduced, the technological line is simplified, three materials are independently preheated respectively, the detonation points of three gases can be avoided in a larger range, the reaction efficiency is improved, the energy consumption is reduced, 10-15 percent of raw natural gas can be saved, and about 5,000-5,500 thousands can be saved every year.

Description

technical field [0001] The invention relates to the organic synthesis industry, in particular to a method and system for providing air for a hydrogen cyanide production system. Background technique [0002] Hydrocyanic acid is a chemical raw material with a wide range of uses, widely used in medicine, food additives, feed additives, electroplating, metallurgy, polymers, photography, mining, rubber, cosmetics, pesticides, dyes, fertilizers and other fields. At present, there are mainly four synthesis methods in the industry: one is Angle's method, the principle of which is to use methane, ammonia and oxygen in the air as raw materials, and high-temperature oxidation synthesis in the presence of a platinum catalyst; the other is BMA invented by Degussa Company The principle is to use methane and ammonia to synthesize without adding oxygen; the third is the formamide dehydration method invented by BASF. The fourth is the light oil cracking method, which uses ammonia and low-ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01C3/02
Inventor 方善伦柳亚玲刘丹杨成威徐代行
Owner CHONGQING UNISPLENDOUR INT CHEM