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Method and apparatus for separating blast furnace gas

A technology of blast furnace gas and separation method, applied in separation method, blast furnace, blast furnace details, etc., can solve the problems of difficult concentration/separation of various target gases, difficulty in concentration and recovery of hydrogen, etc.

Active Publication Date: 2013-05-29
JFE STEEL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, it is difficult to concentrate / separate various target gases individually by the first-stage PSA operation
In particular, in the case of blast furnace gas whose target gases are carbon dioxide and hydrogen, it is more difficult to concentrate and recover hydrogen while concentrating / separating carbon dioxide because the hydrogen concentration is as low as 2 to 6%.

Method used

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  • Method and apparatus for separating blast furnace gas
  • Method and apparatus for separating blast furnace gas
  • Method and apparatus for separating blast furnace gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0082] The inventors of the present invention have intensively studied the improvement of the separation / recovery rate and the reduction of energy and cost required for separation / recovery when separating / recovering blast furnace gas, and found that in the nitrogen, carbon monoxide, carbon dioxide and hydrogen contained in the blast furnace gas It is important to combine which components are separated as a gas containing various components and in what order to separate the gas containing various components.

[0083] Embodiment 1 is based on the above point of view, and its gist is constituted as follows.

[0084] 1. The separation method of blast furnace gas is characterized in that, when using a two-stage gas separation and purification device, the blast furnace gas discharged from the blast furnace is separated into each gas containing various components,

[0085] First, through the first-stage gas separation and purification device, the blast furnace gas is separated into: ...

Embodiment

[0142] In the following, the separation method of blast furnace gas according to Embodiment 1 shows the result of separation by both the first-stage gas separation and purification device and the second-stage gas separation and purification device by the pressure swing adsorption method. In addition, the separation by the gas separation apparatus of the 3rd stage was not implemented. In addition, it is sufficient that the separation operation and conditions adopted in this experimental example can obtain corresponding effects, and any known technology related to this technology can also be used, and the following description does not limit the technical scope of the present invention. It should be noted that all pressures are absolute pressures.

[0143] The gas separation in the first-stage gas separation and purification device is performed by a gas separation and purification device including an adsorption tower filled with monovalent copper-carrying activated carbon. Each...

Embodiment approach 2

[0156] Embodiment 2 is an embodiment conceived under such circumstances, and its object is to provide a method and apparatus for separating carbon dioxide from blast furnace gas mainly containing carbon dioxide, nitrogen, carbon monoxide, and hydrogen, and concentrating / separating combustible components of the residual gas.

[0157] The blast furnace gas separation method provided by the first aspect of Embodiment 2 is a method for separating blast furnace gas containing carbon dioxide, nitrogen, hydrogen, and carbon monoxide, and is characterized in that it includes: a first pressure swing adsorption type gas separation process, It repeats the cycle including the first adsorption process and the first desorption process by using the pressure swing adsorption gas separation method carried out in the first adsorption tower filled with the first adsorbent, wherein the first adsorbent is used for Preferentially adsorbing carbon dioxide, the first adsorption process introduces the ...

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Abstract

A blast furnace gas discharged from a blast furnace is separated into gases containing various components using two-stage gas separation and refinement apparatuses. First, the blast furnace gas is separated into a gas containing H 2 , N 2 , and an unavoidable impurity gas component, a gas containing N 2 and an unavoidable impurity gas component, a gas containing N 2 , CO, CO 2 , and an unavoidable impurity gas component, and a gas containing CO, CO 2 , and an unavoidable impurity gas component with a gas separation and refinement apparatus of a first stage. Then, of these separated gases, the gas containing CO, CO 2 , and the unavoidable impurity gas component is separated into a gas containing CO and an unavoidable impurity gas component, a gas containing CO 2 and an unavoidable impurity gas component, and a gas containing CO, CO 2 , and an unavoidable impurity gas component with a gas separation and refinement apparatus of a second stage.

Description

technical field [0001] The invention relates to a method and device for separating blast furnace gas discharged from a blast furnace. Background technique [0002] In ironworks, coke ovens, blast furnaces, converters, etc. produce gases called by-product gases. Most of this by-product gas is used in applications utilizing heat generated by combustion, such as power plants and heating furnaces. However, in addition to components that can be used as fuel such as hydrogen, carbon monoxide, and methane, it also contains inert components such as nitrogen and carbon dioxide. Therefore, compared with propane gas or natural gas, which are general fuel gases, the heat per unit volume is low. 700~4500kcal / Nm 3 The problem. In particular, the heat per unit of blast furnace gas is 700kcal / Nm 3 Left and right, it belongs to the lowest kind of heat of the by-product gas. [0003] This is because there are few fuel components such as hydrogen, carbon monoxide, and methane in blast fur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F27D17/00B01D53/02B01D53/04B01D53/14B01D53/22B01D53/62C10K1/08C10K1/32C21B5/06
CPCF27B1/10B01D2257/404F27D17/001C21B5/06C10K1/32B01D2257/502C21B7/002F27B1/18F27D17/008Y02C10/10B01D2257/504Y02C10/08C21B2100/04Y02C10/06Y02C10/04B01D53/82C21B2100/02B01D53/04B01D2259/4145B01D2257/108B01D53/047B01D2256/16B01D2256/20B01D2258/025B01D2259/403B01D2259/414C21B2100/28C21B2100/282C21B2100/284Y02P10/122Y02P10/25Y02P20/129Y02P20/151Y02C20/40B01D53/02B01D53/14C10K1/08F27D17/00
Inventor 中川二彦茂木康弘原冈卓司岸本启齐间等坂井至三宅正训高田吉则住田俊彦
Owner JFE STEEL CORP