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Coke oven gas methanation feeding method

A feeding method and technology of coke oven gas, which is applied in the field of LNG production, can solve the problems of high cost and long feeding time, and achieve the effect of saving feeding time and reducing cost consumption

Pending Publication Date: 2022-08-02
SD STEEL RIZHAO CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problems of long feeding time and high cost of methanation in the prior art, the present invention provides a coke oven gas methanation feeding method, which shortens the feeding time, reduces energy consumption, reduces labor intensity, and makes the ultimate methanation outlet gas index Can quickly reach qualified standards and reduce production costs

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  • Coke oven gas methanation feeding method
  • Coke oven gas methanation feeding method
  • Coke oven gas methanation feeding method

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Embodiment 1

[0029] The method for feeding coke oven gas methanation of the present invention comprises the following steps:

[0030] (1) If figure 1 , start the fan 101, and cycle the temperature of the primary methanation reactor 9, the secondary methanation reactor 15, and the tertiary methanation reactor 38. The primary methanation reactor 9, the secondary methanation reactor 15, the third The stage methanation reactor 38 is arranged on the circulating pipeline, the circulating pipeline includes pipeline a, pipeline b and pipeline d, the circulating pipeline is provided with a heating device and a start-up fan 101, and the heating device includes an electric furnace 102, a steam superheater A103, a first material inlet and outlet The material heat exchanger 104, the supplementary heater 105, the second material inlet and outlet material heat exchanger 106, the inlet temperature of the second stage methanation reactor 9 after heating is 350°C, and the outlet temperature is 330°C; the in...

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Abstract

The invention relates to the technical field of LNG (liquefied natural gas) production, in particular to a coke oven gas methanation feeding method, which realizes simultaneous feeding after main methanation and ultimate methanation are completed by starting a fan and nitrogen temperature rise, the nitrogen temperature rise process is performed by stopping the fan, and after gas distribution is completed, the main methanation and the ultimate methanation are simultaneously fed. The temperature of a methanation system and the pressure of a steam pocket are increased, meanwhile, an ejector, self-produced steam and an ammonia distillation system are merged into the system, all process indexes rapidly meet the requirements after feeding is finished, the independent feeding time of final methanation is saved by 2 hours, and the cost consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of LNG production, in particular to a method for feeding coke oven gas for methanation. Background technique [0002] During the start-up and feeding of LNG methanation, the temperature of the first-stage methanation bed is raised to 350-330°C by the start-up fan, the temperature of the second-stage methanation bed is raised to 320-300°C, and the temperature of the third-stage methanation bed is raised to 320-300°C. The temperature is raised to 250-240°C, and the main formaldehyde (the first-stage methanation reactor, the second-stage methanation reactor) and the final methanation (the third-stage methanation reactor) are separately fed. First, switch the heating process of the starting fan to the final methanation cycle and heat preservation. Before the main armor is fed, the raw material gas and the pipe network steam are distributed (it takes 1 hour), and then the main methanation is fed. The heating rat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10K3/06C10L3/08
CPCC10K3/06C10L3/08Y02P20/129
Inventor 类国庆张满冀传玖许保明李艳涛张守强亓斌刘玉斌杨文明栾树龙倪维龙张金凯高寒
Owner SD STEEL RIZHAO CO LTD
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