Method for preparing clean fuel from coal tar, method for preparing clean fuel from coal and prepared clean fuel

Abstract

The invention discloses a method for preparing clean fuel from coal tar and a method for preparing the clean fuel from coal. The method for preparing the clean fuel from the coal tar comprises following steps: the coal tar is subjected to distillation separation, and a carbolic oil fraction, an intermediate fraction and a heavy fraction are obtained; the carbolic oil fraction and methyl alcohol are subjected to etherification, and a high-octane component is obtained; the heavy fraction is subjected to extraction separation, and deasphalted oil is obtained; the intermediate fraction and the deasphalted oil are subjected to hydrorefining and hydrocracking, a mixture is subjected to fractional distillation, and a gasoline fraction and a diesel fraction are obtained; the high-octane component is added to the gasoline fraction, and blended gasoline is obtained. According to the method for preparing the clean fuel from the coal, the raw material coal is pyrolyzed, and the coal tar, semicoke and pyrolysis gas are obtained. With the adoption of the technical scheme, sufficient deep processing of the coal tar resource and the coal resource are realized, the high-octane component is obtained, and the gasoline fraction meeting the national standard is obtained.

Description

technical field

[0001] The invention relates to the field of coal deep processing, in particular to a method for preparing clean fuel from coal tar, a method for preparing clean fuel from coal, and the clean fuel prepared by the two methods. Background technique

[0002] my country is a country rich in coal resources but relatively short of oil resources. With the rapid development of the national economy, my country's demand for oil products continues to grow rapidly. Therefore, in order to ensure the sustainable development of my country's national economy, optimize the energy structure and reduce oil imports It has become an inevitable choice for my country's energy strategy to make full use of the advantages of my country's rich coal resources, vigorously develop the high-tech industry of coal chemical industry, and replace some petrochemical products with coal chemical products.

[0003] Coal-to-liquids (CTL) is a technology that uses coal as raw material to produce oil ...

Examples

Embodiment 1

[0081] like figure 1 The process flow shown is as follows:

[0082] (1) The raw coal (Shenmu coal) is pulverized and sent to a vertical carbonization furnace for pyrolysis reaction at a pressure of 0.05MPa and a temperature of 650°C to obtain coal tar (see Table 1 below for properties), semi-coke and pyrolysis gas . The semi-coke is sent to the fluidized bed gas generator, under the conditions of pressure 0.13MPa, temperature 1000°C, gas-solid ratio 5:1 (volume / volume), with water vapor and oxygen (water vapor and oxygen The volume ratio is 4:1) to react to obtain gasified crude gas. The gasified crude gas is pressurized to 3.0MPa and then enters the sulfur-resistant conversion device, and the components in the gas meet the requirements of H in the raw material gas for methanol synthesis. 2 / CO requirements, the converted gas enters the desulfurization device to reduce the total sulfur content in the gas to less than 0.1ppm, and then pressurizes to 5.0MPa through the compre...

Embodiment 2

[0096] like figure 2 The process flow shown is as follows:

[0097] (1) The raw coal (Shenmu coal) is pulverized and sent to a vertical carbonization furnace for pyrolysis reaction at a pressure of 0.05 MPa and a temperature of 650°C to obtain coal tar (see Table 1 above for properties), semi-coke and pyrolysis gas . The semi-coke is sent to the fluidized bed gas generator, under the conditions of pressure 0.13MPa, temperature 1000°C, gas-solid ratio 5:1 (volume / volume), with water vapor and oxygen (water vapor and oxygen The volume ratio is 4:1) to react to obtain gasified crude gas. The gasified crude gas is pressurized to 3.0MPa and then enters the sulfur-resistant conversion device, and the components in the gas meet the requirements of H in the raw material gas for methanol synthesis. 2 / CO requirements, the converted gas enters the desulfurization device to reduce the total sulfur content in the gas to less than 0.1ppm, and then pressurizes to 6.0MPa through the comp...

Embodiment 3

[0110] like figure 2The process flow shown is as follows:

[0111] (1) The raw coal (Tongliao coal) was pulverized and sent to a vertical carbonization furnace for pyrolysis reaction at a pressure of 0.03 MPa and a temperature of 550°C to obtain coal tar (see Table 6 for properties), semi-coke and pyrolysis gas. The semi-coke is sent into the gasifier, and the gasified crude gas is obtained under the conditions of a pressure of 2.8MPa and a temperature of 1200°C. The gasified crude gas is pressurized to 3.0MPa and then enters the sulfur-resistant conversion device, and the components in the gas meet the requirements of H in the raw material gas for methanol synthesis. 2 / CO requirements, the converted gas enters the desulfurization device to reduce the total sulfur content in the gas to less than 0.1ppm, and then pressurizes to 5.0MPaMPa through the compressor, and then enters the methanol synthesis device (fixed bed reactor) for methanol synthesis reaction. The conditions ...

technical field

[0001] The invention relates to the field of coal deep processing, in particular to a method for preparing clean fuel from coal tar, a method for preparing clean fuel from coal, and the clean fuel prepared by the two methods. Background technique

[0002] my country is a country rich in coal resources but relatively short of oil resources. With the rapid development of the national economy, my country's demand for oil products continues to grow rapidly. Therefore, in order to ensure the sustainable development of my country's national economy, optimize the energy structure and reduce oil imports It has become an inevitable choice for my country's energy strategy to make full use of the advantages of my country's rich coal resources, vigorously develop the high-tech industry of coal chemical industry, and replace some petrochemical products with coal chemical products.

[0003] Coal-to-liquids (CTL) is a technology that uses coal as raw material to produce oil ...

Examples

Embodiment 1

[0081] like figure 1 The process flow shown is as follows:

[0082] (1) The raw coal (Shenmu coal) is pulverized and sent to a vertical carbonization furnace for pyrolysis reaction at a pressure of 0.05MPa and a temperature of 650°C to obtain coal tar (see Table 1 below for properties), semi-coke and pyrolysis gas . The semi-coke is sent to the fluidized bed gas generator, under the conditions of pressure 0.13MPa, temperature 1000°C, gas-solid ratio 5:1 (volume / volume), with water vapor and oxygen (water vapor and oxygen The volume ratio is 4:1) to react to obtain gasified crude gas. The gasified crude gas is pressurized to 3.0MPa and then enters the sulfur-resistant conversion device, and the components in the gas meet the requirements of H in the raw material gas for methanol synthesis. 2 / CO requirements, the converted gas enters the desulfurization device to reduce the total sulfur content in the gas to less than 0.1ppm, and then pressurizes to 5.0MPa through the compre...

Embodiment 2

[0096] like figure 2 The process flow shown is as follows:

[0097] (1) The raw coal (Shenmu coal) is pulverized and sent to a vertical carbonization furnace for pyrolysis reaction at a pressure of 0.05 MPa and a temperature of 650°C to obtain coal tar (see Table 1 above for properties), semi-coke and pyrolysis gas . The semi-coke is sent to the fluidized bed gas generator, under the conditions of pressure 0.13MPa, temperature 1000°C, gas-solid ratio 5:1 (volume / volume), with water vapor and oxygen (water vapor and oxygen The volume ratio is 4:1) to react to obtain gasified crude gas. The gasified crude gas is pressurized to 3.0MPa and then enters the sulfur-resistant conversion device, and the components in the gas meet the requirements of H in the raw material gas for methanol synthesis. 2 / CO requirements, the converted gas enters the desulfurization device to reduce the total sulfur content in the gas to less than 0.1ppm, and then pressurizes to 6.0MPa through the comp...

Embodiment 3

[0110] like figure 2The process flow shown is as follows:

[0111] (1) The raw coal (Tongliao coal) was pulverized and sent to a vertical carbonization furnace for pyrolysis reaction at a pressure of 0.03 MPa and a temperature of 550°C to obtain coal tar (see Table 6 for properties), semi-coke and pyrolysis gas. The semi-coke is sent into the gasifier, and the gasified crude gas is obtained under the conditions of a pressure of 2.8MPa and a temperature of 1200°C. The gasified crude gas is pressurized to 3.0MPa and then enters the sulfur-resistant conversion device, and the components in the gas meet the requirements of H in the raw material gas for methanol synthesis. 2 / CO requirements, the converted gas enters the desulfurization device to reduce the total sulfur content in the gas to less than 0.1ppm, and then pressurizes to 5.0MPaMPa through the compressor, and then enters the methanol synthesis device (fixed bed reactor) for methanol synthesis reaction. The conditions ...

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