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A gasification method for co-feeding residual oil, dry powder and coal-water slurry

A technology of coal-water slurry and residual oil, which is applied to the gasification field where residual oil, dry powder and coal-water slurry are fed together, can solve the problems of reduced coal gasification efficiency, singleness, and difficulty in increasing the concentration of coal-water slurry.

Active Publication Date: 2018-05-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the above method does not involve how to improve the solid content and gasification efficiency of coal water slurry
Due to the different properties of coal, it is difficult to increase the concentration of coal water slurry prepared by some coal types, which reduces the efficiency of coal gasification. There is no teaching in the prior art on how to improve the efficiency of coal water slurry gasification
Although it is mentioned in the prior art that the gasification raw material can be various raw materials such as coal, residual oil, petroleum coke, etc., but from the disclosed content, its feed is a single raw material, and it is not pointed out that multiple raw materials can be fed at the same time

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  • A gasification method for co-feeding residual oil, dry powder and coal-water slurry
  • A gasification method for co-feeding residual oil, dry powder and coal-water slurry
  • A gasification method for co-feeding residual oil, dry powder and coal-water slurry

Examples

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Effect test

Embodiment 1

[0048] This example is used to illustrate the gasification method for co-feeding the residual oil, dry powder and coal-water slurry provided by the present invention.

[0049] The ash content of the residual oil is 27.33%, and its composition is shown in Table 2. The residual oil is transported by steam, and the steam-oil ratio is about 0.41. The solid content of the coal water slurry is 50% by weight, and the average particle size of the solid particles is 71 μm. The speeds of the coal water slurry and residual oil are about 10 m / s and 8.9 m / s respectively, and enter the opposite side nozzles respectively. The speed of the gasification agent (oxygen) entering the furnace is about 100m / s. The type of coal used in dry pulverized coal is the same as that used in coal-water slurry, and its composition is shown in Table 1. The ground dry coal powder (average particle size is 65 μm) is passed through a small amount of N 2 Conveying, the conveying density is about 400kg / m 3 . Th...

Embodiment 2

[0062] This example is used to illustrate the gasification method for co-feeding the residual oil, dry powder and coal-water slurry provided by the present invention.

[0063] The dry powder is prepared by mixing dry coal powder (the same as that in Example 1) and petroleum coke powder at a mass ratio of about 1:1. The ash content of petroleum coke is 0.86%. The composition is shown in Table 5. The ground dry powder (average particle size is 70μm) is passed through N 2 Conveying, the conveying density is about 400kg / m 3 . Its feed rate is about 14t / h. The ash content of the residual oil is 27.33%, and its composition is shown in Table 2. The residual oil is transported by steam, and the steam-oil ratio is about 0.41. The solid content of the coal water slurry is 50%, and the solid particle size is 75 μm, and its composition is shown in Table 1. The inlet velocities of coal water slurry and residual oil are about 10.2m / s and 10.4m / s respectively, and they enter the opposite...

Embodiment 3

[0069] This example is used to illustrate the gasification method for co-feeding the residual oil, dry powder and coal-water slurry provided by the present invention.

[0070] The dry powder is petroleum coke powder with an ash content of 0.86%, and its composition is shown in Table 5. The ground petroleum coke powder (average particle size is 75μm) is passed through N 2 Conveying, the conveying density is about 400kg / m 3 . Its feed rate is about 14t / h. The ash content of the residual oil is 27.33%, and its composition is shown in Table 2. The residual oil is transported by steam, and the steam-oil ratio is about 0.41. The solid content of the coal water slurry is 50%, and the average particle size of the solid particles is 72 μm, and its composition is shown in Table 1. The inlet velocities of coal water slurry and residual oil are about 8.9m / s and 9.2m / s respectively, and they enter the opposite side nozzles respectively. The speed of the gasification agent (oxygen) ent...

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Abstract

The invention relates to a gasification method for co-feeding residual oil, dry powder and coal-water slurry. The method comprises: injecting the residual oil and the coal-water slurry into the gasifier through the opposed nozzles on the side upper wall of the gasifier respectively, At the same time, the dry powder is injected into the gasifier through the feeding pipe at the top of the gasifier, and the residual oil, the coal-water slurry and the dry powder are co-gasified. According to the gasification method provided by the present invention, gasification can still be achieved under the condition of co-feeding of residual oil, dry powder and coal-water slurry, and a high conversion rate can be obtained, and the H2 / CO in the product distribution is relatively high.

Description

technical field [0001] The invention relates to the fields of coal gasification and residual oil gasification, in particular to a gasification method in which residual oil, dry powder and coal-water slurry are fed together. Background technique [0002] With the continuous rapid development of the economy, my country's demand for energy continues to expand, making oil self-sufficiency decline year by year: by the end of 2011, the proportion of oil imports has accounted for 56%, which is a huge challenge to my country's energy security. In my country's primary energy reserves, more than 96% are coal resources. Researchers should use the huge coal reserves and vigorously develop coal chemical technology to alleviate the increasing demand for energy. The core of the leading technology of coal chemical industry lies in coal gasification technology with high efficiency, flexibility and wide application range of raw materials. In particular, the coal gasification method of multi-r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/48C10J3/50
Inventor 吴治国王航龙军王鹏飞王蕴王卫平崔龙鹏韩江华
Owner CHINA PETROLEUM & CHEM CORP
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