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Coal gas utilization method realized by coal-tar fraction hydro-upgrading and LNG manufacturing combination

A technology for hydrogenation and upgrading, coal tar, applied in chemical instruments and methods, hydrogen, petroleum industry, etc., can solve the problems that hydrogen cannot achieve rationalization and maximization of resource utilization, and there is no integrated solution for rich gas.

Inactive Publication Date: 2015-09-30
CHENGDU TCWY NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] To sum up: the coal tar distillate hydrogenation upgrading process with coke oven gas as raw material has defects in the comprehensive utilization of coke oven gas, which is mainly reflected in the lack of integrated solutions for the utilization of Fuyu gas. Rationalization and maximization of resource utilization cannot be achieved under the conditions of changes in the amount of raw gas and production load, and the increase and decrease of hydrogen demand.

Method used

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  • Coal gas utilization method realized by coal-tar fraction hydro-upgrading and LNG manufacturing combination
  • Coal gas utilization method realized by coal-tar fraction hydro-upgrading and LNG manufacturing combination
  • Coal gas utilization method realized by coal-tar fraction hydro-upgrading and LNG manufacturing combination

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1, the combined operation of coal tar fraction hydrotreating and LNG production.

[0031] Such as figure 2 As shown, the following steps are included in sequence: primary compression process, TSA process, secondary compression process, pre-hydrogenation / sulfur tolerance conversion process, deacidification process, hydrodesulfurization process, methanation process, PSA-H2 process and LNG In the product process, the product hydrogen is obtained through the PSA-H2 process and the deoxygenation drying process, and the LNG product is obtained through the LNG product process.

[0032] The deacidification process includes MDEA decarburization process and desulfurization process, and adjusts deCO2 according to the change of raw material composition and flow rate 2 In order to achieve carbon and hydrogen balance, the LNG product process includes compression process, purification process and liquefaction process in sequence. The hydrogen separated in the liquefaction...

Embodiment 2

[0034] Embodiment 2, the coal tar distillate hydrotreating upgrading process operates independently.

[0035] Such as image 3 As shown, it includes the following steps in sequence: primary compression process, TSA process, secondary compression process, PSA-H2 process and deoxidation drying process. Coke oven gas can obtain product hydrogen after the above steps.

Embodiment 3

[0036] Embodiment 3, the process of producing LNG operates independently.

[0037] Such as Figure 4 As shown, it includes the following steps in sequence: primary compression process, TSA process, secondary compression process, pre-hydrogenation process, hydrodesulfurization process, methanation process, PSA-H2 process, compression process, purification process and liquefaction process, coke After the furnace gas goes through the above steps, the excess hydrogen is sent out from the PSA-H2 process, and the LNG product is obtained after the liquefaction process.

[0038] In Embodiments 1, 2, and 3, additional hydrogen can be obtained through the pre-hydrogenation / sulphur-resistant conversion process (the range of conversion is 0-96%) according to the raw material composition and flow conversion, so that the device can be operated in combination or Each independent operation can achieve carbon and hydrogen balance, meet the needs of the process, and also ensure the safe operat...

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Abstract

The invention discloses a coal gas utilization method realized by coal-tar fraction hydro-upgrading and LNG manufacturing combination. The coal gas utilization method sequentially comprises the following steps: a primary compression procedure, a TSA procedure, a secondary compression procedure, a prehydrogenation / sulfur-tolerant shift procedure, a deacidification procedure, a hydrodesulfurization procedure, a methanation procedure, a PSA-H2 procedure and an LNG product procedure. The product hydrogen is obtained through the PSA-H2 procedure and the deoxidizing and drying procedure, and the LNG product is obtained through the LNG product procedure. According to the coal gas utilization method, through the prehydrogenation / sulfur-tolerant shift procedure (the shift rate is adjustable) and the deacidification procedure (complete deacidification or partial deacidification), carbon-hydrogen constant equilibrium can be realized under various work conditions and various coke oven gas contents, and the demands for combined operation or independent operation of fraction hydro-upgrading and LNG manufacturing can be met.

Description

technical field [0001] The invention relates to a technical method for hydrogenation and upgrading of coal tar fractions using coke oven gas as a raw material, in particular to a coal gas utilization method for co-production of coal tar fractions hydrogenation and upgrading and preparation of LNG. Background technique [0002] With the deepening of the implementation of the national energy strategy, the comprehensive utilization of coke oven gas to produce LNG and the production of light fuel oil by hydrogenation and upgrading of coal tar fractions using coke oven gas as raw materials have matured and achieved industrialization. It makes the deep processing of the downstream by-products of the coking industry more perfect, and improves the comprehensive utilization rate of coal. [0003] The current high-temperature coal tar fraction hydrogenation upgrading and low-temperature coal tar fraction hydrogenation upgrading process using coke oven gas as raw material mainly extrac...

Claims

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Application Information

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IPC IPC(8): C10L3/08C10L3/10C01B3/34
Inventor 张华伟刘文胜莫清启王力吴少清孙庆昌
Owner CHENGDU TCWY NEW ENERGY TECH
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