Methanation reactor and methanation process

Abstract

The invention discloses a methanation reactor and a methanation process. The reactor comprises a cylindrical sealed pressure-bearing shell body (1), a gas inlet pipe (2), a gas outlet pipe (3), a radial catalytic reaction zone and heating equipment, wherein the gas inlet pipe (2) extends inside the shell body from the top of the shell body (1), the gas outlet pipe (3) extends inside the shell body from the bottom of the shell body (1), and the radial catalytic reaction zone is formed in the shell body (1) below the gas inlet pipe (2) and above the gas outlet pipe (3) and comprises the heating equipment. Compared with the prior art, the methanation reactor and the methanation process have the advantages that the methanation reactor disclosed by the invention is low in active metal consumption and smaller in equipment size, and the methanation process adopting the methanation reactor is low in bed layer pressure drop and high in feedstock conversion ratio, is free of gas bias and short-circuit phenomena and has the characteristics of high economic benefit, low comprehensive energy consumption and the like.

Description

technical field [0001] The invention relates to a methanation reactor and a methanation process. Background technique [0002] my country's energy structure is rich in coal, poor in oil, and low in gas. The current domestic natural gas production is far from meeting the needs of the rapid development of the national economy. The development of coal to replace natural gas is not only a clean and efficient use of coal resources, but also a strategic supplement to the shortage of conventional natural gas in my country. It plays a vital role in optimizing the industrial structure and ensuring the normal operation of the national economy. [0003] Coal-to-natural gas substitution is mainly through coal gasification, transformation, acid gas removal, methanation and other processes to finally obtain methane products that meet the quality requirements. The methanation reaction is CO, CO 2 with H 2 Under the action of methanation catalyst, CH 4 and H 2 The reaction of O is a s...

AI Technical Summary

Problems solved by technology

The Chinese patent with the notification number CN202893334U discloses a microchannel reactor. The microchannel reactor adopts a titanium alloy plate structure, and each titanium alloy cooling cover plate is provided with a cooling chamber and a reaction chamber. The microchannel reactor can withstand High pressure and corrosion resistance, the disadvantage is that the reactant stays in the reaction chamber for a short time and the production efficiency is low

The Chinese patent with the notification number CN203540513U discloses a microchannel reactor used in the methanation process. The reactor fixes the microreaction channel on the support plate in the middle of the reactor, so it is difficult to eliminate the stress caused by thermal expansion and contraction

The Chinese patent with the notification number CN102151531A discloses a methanation reactor and a method for complete methanation of syngas. The microreactor is arranged in parallel with several reaction channels and heat transfer channels alternately, and the pressure drop of the reactor is relatively large. Difficult to withstand high pressure

The Chinese patents with the notification numbers CN204841617U and CN204816459U apply the methanation reactor to the coal-to-SNG methanation process, and the target product has high selectivity. The disadvantage is that the residence time of the feed gas in this type of reactor is relatively short. low raw material conversion rate

Images