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Methanation reactor and methanation process

A methanation reactor and reactor technology, applied in chemical instruments and methods, organic chemistry, petroleum industry, etc., can solve problems such as unbearable high pressure, large pressure drop in reactor, difficulty in eliminating thermal expansion and contraction stress, etc., to achieve The effect of short residence time, prolonging the service life and shortening the processing time

Active Publication Date: 2017-02-08
SINOPEC ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN201320593757.7 discloses a microchannel reactor for methanation process, the microreaction channel is fixed on the support plate in the middle of the reactor, it is difficult to eliminate the stress caused by thermal expansion and contraction; CN201110030881.8 discloses a microchannel reactor Channel reactor and its synthesis gas complete methanation method, the microreactor is composed of several reaction channels and heat transfer channels arranged in parallel alternately, the pressure drop of the reactor is large, and it is difficult to withstand high pressure

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  • Methanation reactor and methanation process

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Embodiment 1

[0076] Such as Figure 4 As shown, the reaction device of this embodiment consists of 1# main methanation reactor 27, 2# main methanation reactor 28, supplementary methanation reactor 29, steam superheater 30, boiler feed water heater 31, 2# cooler 32. 1# cooler 33, product separator 34 and steam drum 35 are connected. The two main methanation reactors are connected in parallel and share a steam drum 35 with the supplementary methanation reactor.

[0077] The operation steps are as follows:

[0078] a. H 2 The / CO volume ratio is 3.0 (M=3.0), the pressure is 3.5MPa, the synthesis gas temperature is 250°C, and the total volume flow rate is 10m 3 / h, divided into two streams to enter the main methanation reactor, one stream enters the 1# main methanation reactor 27 for the main methanation reaction, and the other synthesis gas enters the 2# main methanation reactor 28 for the main methanation reaction, The micro-reaction channels of the two main methanation reactors have the...

Embodiment 2

[0089] Such as Figure 5-7 As shown, the difference between embodiment 2 and embodiment 1 is that the vertical catalytic reaction unit of the methanation reactor is located above the horizontal catalytic reaction unit, and the horizontal catalytic reaction unit is not provided with a cooling medium inlet, a cooling medium outlet and a cooling medium pipeline .

[0090] Such as Figure 8 As shown, the difference between Example 2 and Example 1 is that the boiler feed water is preheated by the boiler feed water heater 31 and then exchanges heat with the steam superheater 30 instead of being sent to the methanation reactor for cooling.

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Abstract

The invention discloses a methanation reactor and a methanation process. The methanation reactor comprises a shell, a gas inlet pipe, a transverse catalytic reaction unit, a longitudinal catalytic reaction unit, a gas outlet pipe, axial micro-reaction channels and radial micro-reaction channels, wherein a component with catalytic activity may be loaded in the axial micro-reaction channels and radial micro-reaction channels. Compared with the prior art, the invention has the advantages that the methanation reactor is reduced in the usage amount of a catalyst; and when the methanation reactor is used for methanation, pressure drop among beds is reduced, gas retention time is short, the utilization rate of the space of reaction beds is high, and the phenomena of bias current and short circuit of gas do not occur.

Description

technical field [0001] The invention relates to a methanation reactor and a methanation process. Background technique [0002] The methanation reactor is one of the core equipment of the coal-to-natural gas project. The methanation reaction is a strongly exothermic reaction, and CO and CO 2 The competitive methanation reaction and the reverse water gas shift reaction at high temperature, efficient heat and mass transfer are the control of CO and CO 2 Key to competing methanation and high temperature reverse water gas shift. Studies have shown that for every 1% of CO converted or CO 2 The adiabatic temperature rise that can be produced reaches 70°C or 60°C, respectively. In order to control the temperature of the methanation reaction and recover a large amount of heat energy generated in the reaction, the industrial methanation process uses multiple fixed-bed methanation reactors connected in series to carry out the methanation reaction step by step. Companies that have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/02C10L3/08C07C9/04C07C1/04
Inventor 张旭戴文松王子宗蒋荣兴
Owner SINOPEC ENG
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