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Coal carbonization, oil-gas washing separation and delayed coking combined technology and device

A technology of delayed coking and coal dry distillation, applied in the field of coal chemical industry, can solve the problems of low efficiency, complicated steps and high cost

Inactive Publication Date: 2016-06-29
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problems of complex coal dry distillation, oil-gas separation and delayed coking combined process steps, low efficiency, huge energy waste, and high cost in the prior art, and then provide a simple-step, high-efficiency, Coal dry distillation, oil gas washing separation and delayed coking combined process and device with low energy consumption and low cost

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  • Coal carbonization, oil-gas washing separation and delayed coking combined technology and device

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Embodiment 1

[0041] A coal dry distillation, oil and gas washing separation and delayed coking combined process described in this embodiment includes the following steps:

[0042] 1) Pass the oil gas at 650°C produced by carbonization and pyrolysis of coal in the dry distillation reactor 1 into the washing tower 2 at a flow rate of 10m / s through the gas guide pipe 11 at 750°C for washing and dust removal treatment, and control the top of the washing tower 2 The temperature is controlled at 80°C, the temperature at the bottom of the tower is controlled at 455°C, the pressure at the top of the tower is -1.6KPa, and the pressure at the bottom of the tower is -1.5KPa. The spray medium in the washing tower 2 is the bottom oil of the fractionating tower 4 to obtain the first dedusting Oil-gas mixture and dusty tower bottom oil;

[0043] 2) Send the dust-containing tower bottom oil into the coke tower 3 for delayed coking, control the temperature of the coke tower 3 to be 430° C., the pressure to...

Embodiment 2

[0046] A coal dry distillation, oil and gas washing separation and delayed coking combined process described in this embodiment includes the following steps:

[0047] 1) Pass the oil gas at 395°C produced by coal dry distillation and pyrolysis in the dry distillation reactor 1 into the washing tower 2 at a flow rate of 60m / s through the gas guide pipe 11 at 450°C for washing and dust removal treatment, and control the top of the washing tower 2 The temperature is controlled at 130°C, the temperature at the bottom of the tower is controlled at 395°C, the pressure at the top of the tower is 0.55 MPa, and the pressure at the bottom of the tower is 0.6 MPa. The spray medium in the washing tower 2 is the bottom oil of the fractionating tower 4 to obtain the first oil-gas mixture for dedusting And dusty tower bottom oil;

[0048] 2) Send the dust-containing tower bottom oil into the coke tower 3 for delayed coking, control the temperature of the coke tower 3 to be 390° C., the press...

Embodiment 3

[0051] A coal dry distillation, oil and gas washing separation and delayed coking combined process described in this embodiment includes the following steps:

[0052] 1) Pass the oil gas at 450°C produced by carbonization and pyrolysis of coal in the dry distillation reactor 1 into the washing tower 2 at a flow rate of 20m / s through the air duct 11 at 700°C for washing and dust removal treatment, and control the top of the washing tower 2 The temperature is controlled at 85°C, the temperature at the bottom of the tower is controlled at 400°C, the pressure at the top of the tower is -1.5KPa, and the pressure at the bottom of the tower is -1.4KPa. The spray medium in the washing tower 2 is the bottom oil of the fractionating tower 4, and the first dedusting is obtained. Oil-gas mixture and dusty tower bottom oil;

[0053] 2) Send the dust-containing tower bottom oil into the coke tower 3 for delayed coking, control the temperature of the coke tower 3 to be 390° C., the pressure ...

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Abstract

The invention provides a coal carbonization, oil-gas washing separation and delayed coking combined technology. The technology comprises steps as follows: 1) oil gas produced during coal carbonization and pyrolysis in a carbonization reactor passes through a washing tower with fractionating tower bottom oil used as a spray medium for washing and dust removal treatment, and a first oil-gas mixture with dust removed and dust-containing tower bottom oil are obtained; 2) the dust-containing tower bottom oil is sent into a coke tower for delayed coking, a second oil-gas mixture is obtained from the top of the coke tower, and pitch coke is obtained from the tower bottom; 3) the second oil-gas mixture is sent to a fractionating tower for separation, a third oil-gas mixture is obtained from the top of the fractionating tower, hydrogenated raw oil is recovered from side lines of the fractionating tower, fractionating tower bottom oil is obtained from the fractionating tower bottom, and the fractionating tower bottom oil is sent into the washing tower to be used as the spray medium. The problems that coal carbonization, oil-gas separation and delayed coking combined technologies have complex steps and are low in efficiency and high in cost, energy waste is enormous and the like in the prior art are solved.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a coal dry distillation, oil and gas washing separation and delayed coking combined process and device. Background technique [0002] Coal resources account for about 70% of my country's energy consumption structure. In particular, my country's low-rank coal reserves are large, and it has the characteristics of good coal quality, low ash, low sulfur, low phosphorus, and high volatile content, and is an ideal raw material for dry distillation. Coal is dry-distilled at medium and low temperatures to obtain products in three forms: tar, gas and semi-coke. Under the condition of adopting relatively mature and advanced technology, medium and low-temperature dry distillation of low-rank coal can obtain at least about 20% of oil and gas and 50% of product semi-coke from raw coal. According to this calculation, about 1.5 billion tons of coal used as fuel in m...

Claims

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Application Information

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IPC IPC(8): C10B53/04C10B43/08C10G9/00
CPCC10B43/08C10B53/04C10G9/00
Inventor 王守峰贺鑫平李万飞王淑岩常景泉李秀辉苗喜林
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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