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Oil-containing gas purification system and oil-containing gas purification method

A purification system, gas technology, applied in combustible gas purification, combustible gas purification/transformation, condensed non-gaseous material gas purification, etc., can solve the problems of large methanol consumption, difficult oil separation, single separated oil products, etc. , to achieve the effects of increasing oil production types, improving self-utilization and reducing consumption

Pending Publication Date: 2022-04-12
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The current oil separation method uses low-temperature methanol to wash the crude gas. For example, the naphthalene-containing crude gas with an inlet gas temperature of 0° is used to remove naphthalene. Due to the limitation of the process and temperature, the separated oil product obtained is single. The separation of the product is difficult, and the consumption of methanol is also large

Method used

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  • Oil-containing gas purification system and oil-containing gas purification method

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Embodiment 1

[0038] For the hydrogasification process, due to its unique reaction mechanism, product hydrogenation and partial gasification can be realized during the pyrolysis process. At present, in the existing process, low-temperature methanol is used to wash the crude gas to remove naphthalene, but this process has strict requirements on the inlet gas, and can only be used for naphthalene-containing crude gas with an inlet gas temperature of 0°, and cannot solve the problem of high temperature. The separation of other heavy oil products in the crude gas results in a single product of the separated oil products, and the subsequent separation of each oil product is more difficult, and the consumption of methanol is also larger.

[0039] In view of the above-mentioned defects, the oily gas purification system and the purification method of oily gas provided in this embodiment realize the purification of oil by adopting multi-stage condensation and self-produced oil circulation washing pro...

Embodiment 2

[0066] Such as figure 2 As shown, the oily gas purification system in this embodiment, on the basis of the purification system provided in Embodiment 1, in order to better realize the staged condensation of oil products and the self-circulation process of oil products, reduce methanol consumption, and realize energy The maximization of recovery can further optimize the process system:

[0067]Make the oily gas purification system also include the first heat exchanger 6, the first heat exchanger 6 is arranged at the first gas inlet 11 and communicated in the self-scrubbing tower 1, to enter the self-scrubbing tower from the first gas inlet 11 1 to cool down the oily gas. The first heat exchanger 6 can be a medium-temperature heat exchanger, so that the oily gas enters the self-scrubbing tower 1 before performing pre-heat exchange, reducing the temperature of the oily gas and recovering the heat of the oily gas. In the first heat exchanger 6 The temperature of the oily gas th...

Embodiment 3

[0072] This embodiment provides a method for purifying oily gas according to the aforementioned system for purifying oily gas. The method is implemented by all or part of the system for purifying oily gas provided in the above embodiments to separate oil from oily gas.

[0073] combine image 3 Shown, below this purification method is described by specific embodiment, this oily gas purification method comprises:

[0074] Step 101, passing the oily gas into the self-scrubbing tower through the first gas inlet of the self-scrubbing tower, and washing the oily gas in the self-scrubbing tower with an oil detergent to obtain self-produced oil;

[0075] Step 102, the oily gas after the washing treatment is passed into the methanol scrubber through the first gas outlet of the scrubber and the second gas inlet of the methanol scrubber, so that the oily gas can be methanoled through the methanol washing liquid in the methanol scrubber. Scrubbing and obtaining purified crude gas and oi...

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Abstract

The invention relates to an oil-containing gas purification system and an oil-containing gas purification method. The purification system comprises a self-washing tower, a methanol washing tower and a separator which are communicated in sequence, the self-washing tower is provided with a first coal gas inlet and a first coal gas outlet, and an oil product detergent is arranged in the self-washing tower so as to wash oil-containing coal gas; the methanol washing tower is provided with a second coal gas inlet and a methanol outlet which are communicated with the first coal gas outlet, and is used for washing methanol washing liquor of the oil-containing coal gas to obtain purified raw coal gas and oil-containing methanol; the separator is provided with a methanol inlet and a first oil product outlet, the methanol inlet is communicated with the methanol outlet, and the separator is used for separating oil-containing methanol to obtain a self-produced oil product; the self-washing tower is further provided with a first circulating inlet, the separator is further provided with a first circulating outlet, and the first circulating outlet is communicated to the first circulating inlet, so that part of self-produced oil flows back to the self-washing tower to serve as an oil detergent, multistage condensation and obtaining of oil of different grades are achieved, and efficient washing is achieved.

Description

technical field [0001] The present disclosure relates to the technical field of gas pyrolysis product recovery, in particular to an oily gas purification system and an oily gas purification method. Background technique [0002] In the field of coal chemical industry, coal pyrolysis technology has received more and more attention because it can realize the cascade utilization of coal. Hydrogasification and co-production of aromatics and methane technology is a new coal pyrolysis technology, which can realize product hydrogenation and partial gasification process during the pyrolysis process, making the product yield and quality far superior to other technologies. [0003] The current oil separation method uses low-temperature methanol to wash the crude gas. For example, the naphthalene-containing crude gas with an inlet gas temperature of 0° is used to remove naphthalene. Due to the limitation of the process and temperature, the separated oil product obtained is single. The ...

Claims

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Application Information

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IPC IPC(8): C10K1/16C10K1/04
Inventor 张正旺汪国庆周三刘明王奕唯王浩强段所行
Owner ENN SCI & TECH DEV