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[Chemical Knowledge]：Production and manufacturing method and process flow of high temperature coal tar

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The manufacturing method
of high temperature coal tar
1. Introduction

High temperature coal tar is an important raw material for chemical production, which is widely used in fuel, medicine, pesticide, plastic, synthetic fiber and other fields. Therefore, it is of great significance to study the manufacturing method of high temperature coal tar for improving the quality of coal tar products, reducing production costs and promoting the development of coal chemical industry. This article will introduce the manufacturing method of high temperature coal tar in detail, including raw material preparation, coking reaction, distillation separation and other steps.

2. raw material preparation

manufacturing high temperature coal tar first task is to prepare the raw materials. Coal is usually used as raw material, which requires good coal quality, high carbon content, moderate volatile matter, low ash and sulfur. Raw coal needs to go through crushing, screening, mixing and other processes to ensure the smooth progress of the coking reaction.

3. coking reaction

coking reaction is the key step to make high temperature coal tar. The prepared raw material coal is sent to the coking furnace and heated to a high temperature (generally 900-1100 ° C) under the condition of isolating air, so that the coal undergoes pyrolysis and polycondensation reactions to generate coal tar and gas. In order to ensure the quality and yield of coal tar, it is necessary to control the temperature, pressure and atmosphere during the coking reaction.

4. distillation separation

After the coking reaction, the generated coal tar and coal gas are cooled and separated. Coal tar contains a variety of organic compounds, which need to be separated by distillation. Generally, a combination of atmospheric distillation and vacuum distillation is used to cut coal tar into different fractions, such as light oil, medium oil and heavy oil, according to the different boiling points of each component.

5. quality control and environmental protection requirements

In the manufacturing process of high-temperature coal tar, product quality and environmental protection requirements need to be strictly controlled. Through the selection of raw coal, the control of coking reaction conditions, the optimization of distillation separation operation and other means, to ensure that coal tar products meet the relevant quality standards and environmental protection requirements. At the same time, it is necessary to strengthen the treatment and recycling of waste water, waste gas, waste residue and other wastes, reduce production costs and improve resource utilization.

6. technology innovation and development trend

With the continuous development of coal chemical technology, the manufacturing method of high temperature coal tar is also constantly innovating and optimizing. Some emerging technologies, such as microwave coking and supercritical extraction, have been used in coal tar manufacturing to improve product quality and yield. At the same time, with the continuous improvement of environmental protection requirements, the coal tar manufacturing process also pays more attention to environmental protection and sustainable development, and strengthens the comprehensive management and recycling of waste.

7. conclusion The manufacturing method of

high temperature coal tar involves many links and factors, and it is necessary to strictly control the quality of raw materials, coking reaction conditions, distillation separation operation and other factors to ensure product quality and environmental protection requirements. With the continuous innovation and development of technology, the manufacturing method of high-temperature coal tar will be more efficient, environmentally friendly and sustainable.

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