Synthesized methanol and synthesized methane co-production method and equipment

A technology for synthesizing methanol and methane, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of hydroxyl compounds, etc., can solve problems such as easy surge of cycle compression equipment, load can not be greatly adjusted, energy waste, etc., to reduce load , reduce investment and production costs, improve the effect of utilization

Active Publication Date: 2014-01-22
杭州林达化工技术工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the defects of energy waste in the prior art, the load in the synthetic natural gas cannot be greatly adjusted, and the cycle compression equipment is easy to surge, etc., the present invention provides a method and equipment for the co-production of synthetic methanol and synthetic methane, especially suitable for synthetic natural gas Production, through the co-production of methanol to adjust the peak-to-valley difference of artificial natural gas production, and at the same time, by adjusting the circulation ratio of the methanol synthesis loop, to prevent the surge of the circulation equipment, improve the utilization rate of raw material gas, reduce production costs and investment, and improve economic benefits

Method used

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  • Synthesized methanol and synthesized methane co-production method and equipment
  • Synthesized methanol and synthesized methane co-production method and equipment
  • Synthesized methanol and synthesized methane co-production method and equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1 can calculate the hydrogen-carbon ratio of fresh gas by the mole fraction of the output of synthetic methanol and methane

[0048] use as image 3 The device for synthesizing methanol and synthesizing methane as shown includes a gasification device X1, a CO conversion device X2, a purification device X3, a methanol synthesis device and a methanation device R2 connected in sequence, and the CO conversion device X2 is connected in parallel with a conversion Bypass L1, the methanol synthesis device includes a compression cycle machine T1, a methanol synthesis reactor R1 and a methanol separator S1, and the compression cycle machine T1 is sequentially connected with the methanol synthesis reactor R1 and the methanol separator S1, and the The compression cycle machine T1 is connected in parallel with an equal pressure bypass L3, the outlet of the recycle gas of the methanol separator S1 is provided with a circulation pipeline L4 connected to the inlet of the com...

Embodiment 2

[0063] Example 2 Regulating natural gas production by adjusting CO conversion rate and methanol production

[0064] Utilize the device described in Example 1 to implement the artificial natural gas production process, the raw material is coal gas, and the natural gas production is regulated by adjusting the CO conversion rate and methanol output. Tables 2 and 3 are respectively the same gas volume and composition using no peak regulation and peak regulation. material balance sheet.

[0065] Table 2 Material list without peak regulation

[0066]

crude synthesis gas

change gas

fresh air

methanation gas

SNG

CH 4 Original

11

11

11

11

96.0 (total CH 4 count)

H 2

31

39.25

39.25

0

CO

20

11.75

11.75

0

CO 2

37

45.25

1

0

N 2

1

1

1

1

4.0

[0067] CH 3 Oh

...

Embodiment 3

[0076] Embodiment 3 regulates the output ratio of methanol and methanation by synthesis pressure

[0077] use as image 3 In the device shown, part of the crude synthesis gas Q1 undergoes a partial shift reaction through the CO shift device, and the other part passes through the shift bypass L1 and mixes with the gas exiting the CO shift device X2 to form shift gas Q2, and then enters the purification device X3 and is removed by washing with low-temperature methanol Sulfur and most of the CO 2 , fresh gas volume and composition are shown in Table 4:

[0078] Table 4 The amount and composition of fresh gas entering methanol synthesis and methanol purge gas entering methanation

[0079]

[0080] Control the methanol synthesis pressure at 4.0, 3.5, and 2.5 MPa to synthesize methanol respectively. The resulting methanol yield and hydrogen-carbon ratio of demethanated gas are shown in Table 5 below:

[0081] Table 5 Calculated data of the same raw material purified gas under ...

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Abstract

The invention discloses a synthesized methanol and synthesized methane co-production method comprising the steps: carrying out pressure gasification on a carbon-containing raw material to obtain crude synthesis gas containing the main components: CH4, H2, CO and CO2, adding a part or all of crude synthesis gas into steam to carry out conversion reaction so as to convert a part of CO into H2 and CO2, then, and purifying and removing sulfides and most of CO2 to increase the ratio of hydrogen to carbon and obtain fresh gas; carrying out methanol synthesis by using a part or all of the fresh gas, and carrying out methanation reaction by using a part or all of the reaction gas after methanol synthesis to obtain artificially synthesized natural gas; adjusting the yield of the synthesized natural gas through adjusting the CO conversion rate and the gas flow and yield of synthesized methanol. The invention also discloses a device for the synthesized methanol and synthesized methane co-production method. According to the invention, the yield of the synthesized natural gas is adjusted through adjusting the CO conversion rate at a CO conversion section and the gas flow and yield of synthesized methanol; meanwhile, the surge of circulating equipment is avoided, the production cost and investment are reduced, and the economic benefit is increased.

Description

technical field [0001] The invention relates to chemical synthesis pipelines and equipment in the technical field of chemical energy engineering, in particular to a method and equipment for the co-production of synthetic methanol and synthetic methane. Background technique [0002] my country's natural gas is mainly for civilian use, and there is a big difference between winter and summer peaks and valleys. Especially in northern China, the gas consumption in summer is small, and in winter, natural gas consumption needs to be greatly increased due to heating. In recent years, there have been different degrees of "gas shortage" during the peak season of gas consumption in winter. Although the gas supply system is equipped with storage facilities such as gas storage and LNG stations, and uses gas-fired power generation in summer to regulate peaks, the effect is not satisfactory. In the short term (one day to one week), the peak shaving of urban natural gas can mainly rely on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/04C07C29/152C07C9/04C07C1/04C10L3/08
CPCC07C1/0475C07C1/0485C07C29/1518C10L3/08C07C31/04C07C9/04
Inventor 楼韧楼寿林
Owner 杭州林达化工技术工程有限公司
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