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Coal syngas circulation gas free methanation technology

A coal-to-synthesis gas and methanation technology, which is applied in the chemical industry, can solve the problems of increasing the power consumption of circulating gas and increasing equipment investment, and achieve the effects of improving energy utilization, reducing steam consumption, and saving production costs

Active Publication Date: 2014-11-19
CNOOC GAS & POWER GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing coal-to-SNG or LNG methanation technology usually uses complex devices of multiple gas cyclers and heat exchangers to control the temperature, and the cycle gas used is as high as five times, which not only increases equipment investment but also greatly increases Cycle gas power consumption

Method used

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  • Coal syngas circulation gas free methanation technology
  • Coal syngas circulation gas free methanation technology
  • Coal syngas circulation gas free methanation technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] See the schematic diagram of this process figure 1 ,like figure 1 Show, pressure 3.5MPa, 100000Nm 3 / H's synthetic gas and synthetic gas in the synthetic gas is less than 0.1 ppm, f = (n H2 -N CO2 ) / (n CO +n CO2 ) = 3.005, the composition of the specific synthetic gas (volume percentage, wet base) is: H 2 : 64.00, CH 4 : 14.30, CO: 20.10, CO 2 : 0.90, n 2 : 0.50, h 2 O: 0.30.Raw gas gas enters the first, second, third, and fourth methane reactors according to 0.22, 0.15, 0.25, and 0.38.A methane reaction is performed in a methane reactor.The gas after the reaction of the first methane reactor is 630 ° C, then enters the waste pot for cooling, and the spacious steam is used.Enter the second and third methane reactors, one of which one group of first methane reactor exports is mixed with the second raw material gas to enter the second methane reactor for methane reaction.The temperature of the gas of the di methane reactor is 630 ° C to enter the waste pot for cooling, and th...

Embodiment 2

[0025] Example of this embodiment figure 2 The process shown in process is carried out, the pressure is 3.5MPa, 100000nm 3 / H's synthetic gas and synthetic gas in the synthetic gas is less than 0.1 ppm, f = (nH2 -N CO2 ) / (n CO +n CO2 ) = 3.005, the composition of the specific synthetic gas (volume score, wet) is: H 2 : 64.00, CH 4 : 14.30, CO: 20.10, CO 2 : 0.90, n 2 : 0.50, h 2 O: 0.30.The raw material gas enters the first, second, and third methane reactors according to 0.32, 0.21, and 0.47 points.In the device, methane reactions are performed.The gas (temperature 650 ° C) after the reaction of the first methane reactor was cooled to cool the pan, and the spacious steam was produced., The third methane reactor, one of the first methane reactors exporting the gas with the second raw material gas (temperature 260 ° C), enters the second methane reactor for methane reactions, and the second methane isThe gas (temperature 650 ° C) of the reactor enters the waste pot for cooling and ...

Embodiment 3

[0027] Example of this embodiment image 3 The process shown, the pressure 3.5MPa, 100000nm 3 / H's synthetic gas and synthetic gas in the synthetic gas is less than 0.1 ppm, f = (n H2 -N CO2 ) / (n CO +n CO2 ) = 3.005, the composition of the specific synthetic gas (volume score, wet) is: H 2 : 64.00, CH 4 : 14.30, CO: 20.10, CO 2 : 0.90, n 2 : 0.50, h 2 O: 0.30.The raw material gas enters the first, second, and third methane reactors according to 0.32, 0.21, and 0.47 points.In the device, methane reactions are performed.The gas (temperature 650 ° C) after the reaction of the first methane reactor was cooled to cool the pan, and the spacious steam was produced., The third methane reactor, one of the first methane reactors exporting the gas with the second raw material gas (temperature 260 ° C), enters the second methane reactor for methane reactions, and the second methane isThe gas (temperature 650 ° C) of the reactor enters the waste pot for cooling and has a gap in the steam; the e...

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Abstract

The invention belongs to the chemical engineering field, and specifically relates to a coal syngas circulation gas free methanation technology. The technology firstly divides a methanation reactor into two parts, the purified raw material gas is divided into a plurality of gas flows, then the gas flows is introduced into the front methanation reactor, wherein parts of the front methanation reactor are connected through a combination mode of serial connection and parallel connection; the gas in the each level of methanation reactors in the front part goes out from the outlet of the first reactor and the outlet is serially connected to other level methanation reactors, or the gas is divided into a plurality of gas flows and enters other level reactors which are connected through a combination mode of serial connection and parallel connection. The technology adopts water steam as the diluting gas for diluting the raw material gas in a methanation reactor, the water steam is mainly applied to the high temperature methanation reaction technology, the pressure of the by-product namely steam is larger than the methanation reaction pressure, and thus the steam can be directly added into the raw material gas in a methanation reactor. The technology does not need a circulation gas compressor, so the production cost is reduced. Because the methanation reaction is a strong heat dissipation reaction, the added water stream is reduced so as to improve the energy utilization rate.

Description

Technical field [0001] The invention is a method of methane -rich technology rich in H2, CO and CO2 gas, which involves a methane process that is a coal -made composite gas without circulating gas. Background technique [0002] my country's fossil energy is the main resources with coal, and coal storage is extremely abundant. At present, it has been proven to have more than 1.28 trillion tons.Petroleum and natural gas resources are relatively poor. The domestic oil and gas output is far from meeting the needs of the rapid development of the national economy. It must rely on a large number of imports to support the development of my country's economy.my country's imported crude oil has increased from 070 million tons in 2000 to 250 million tons in 2011, and in 2012, it reached 55.2%of overseas oil import dependence.In 2009, my country's natural gas production was 830 × 10 8 NM 3 , Increased by 7.7%compared with 2008.Object consumption is 874.5 × 10 8 NM 3 , Year -on -year increase...

Claims

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Application Information

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IPC IPC(8): C10L3/08
Inventor 宋鹏飞杨宽辉姚辉超刘玉成侯建国何洋王秀林冯雅晨高振李敬穆祥宇郑珩张瑜张新波
Owner CNOOC GAS & POWER GRP
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