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Method for preparing hydrogen by utilizing metallurgical slag waste heat to reform regenerative resources rich in methane

A technology for renewable resources and metallurgical slag, applied in chemical instruments and methods, hydrogen, non-metallic elements, etc., can solve the problems of low recovery efficiency of slag waste heat and high cost of hydrogen production process

Active Publication Date: 2012-12-19
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method for producing hydrogen from renewable resources rich in methane by reforming waste heat of metallurgical slag, so as to overcome the problems of low recovery efficiency of slag waste heat and high cost of hydrogen production process in the prior art

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  • Method for preparing hydrogen by utilizing metallurgical slag waste heat to reform regenerative resources rich in methane
  • Method for preparing hydrogen by utilizing metallurgical slag waste heat to reform regenerative resources rich in methane

Examples

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Embodiment 1

[0029] The mixed gas of carbon dioxide, methane and water vapor is passed into the heat exchange bed with blast furnace slag according to the volume fraction of 74% carbon dioxide, 13% methane and 13% water vapor, and the gas flow rate is 1.5m / s~4m / s s, the flow velocity of blast furnace slag is 0.01m / s. The gas is fully preheated in the fluidized bed, the temperature of the slag is lowered, and the solidification process and granulation are carried out at the same time. By controlling the air velocity, the obtained slag particles are brought into the slag chamber in the air flow bed to form a high-temperature slag layer. The gas is further heated through the high-temperature slag layer, and then undergoes catalytic reforming hydrogen production reaction through the catalyst layer to generate carbon monoxide and hydrogen; the gas is converted into hydrogen through a CO device, and the hydrogen content is increased. In the ball milling system, the excess carbon dioxide gas in t...

Embodiment 2

[0031] The mixed gas of carbon dioxide, methane and water vapor is passed into the heat exchange bed with the converter slag according to the volume fraction of 70% carbon dioxide, 22% methane and 8% water vapor, and the gas flow rate is 1.5m / s~5m / s s, the flow velocity of converter slag is 0.01m / s. The gas is fully preheated in the fluidized bed, the temperature of the slag is lowered, and the solidification process and granulation are carried out at the same time. By controlling the air velocity, the obtained slag particles are brought into the slag chamber in the air flow bed to form a high-temperature slag layer. The gas is further heated through the high-temperature slag layer, and then undergoes catalytic reforming hydrogen production reaction through the catalyst layer to generate carbon monoxide and hydrogen; the gas is converted into hydrogen through a CO device, and the hydrogen content is increased. In the ball milling system, the excess carbon dioxide gas in the sy...

Embodiment 3

[0033] The mixed gas of carbon dioxide, methane and water vapor is passed into the heat exchange bed with ferronickel slag according to the volume fraction of 62% carbon dioxide, 18% methane and 20% water vapor, and the gas flow rate is 1.5m / s~5m / s, the flow velocity of ferronickel slag is 0.01m / s. The gas is fully preheated in the fluidized bed, the temperature of the slag is lowered, and the solidification process and granulation are carried out at the same time. By controlling the air velocity, the obtained slag particles are brought into the slag chamber in the air flow bed to form a high-temperature slag layer. The gas is further heated through the high-temperature slag layer, and then undergoes catalytic reforming hydrogen production reaction through the catalyst layer to generate carbon monoxide and hydrogen; the gas is converted into hydrogen through a CO device, and the hydrogen content is increased. In the ball milling system, the excess carbon dioxide gas in the sy...

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Abstract

The invention discloses a method and a device thereof for preparing hydrogen by utilizing metallurgical slag waste heat to reform regenerative resources rich in methane. According to the method, through the chemical reactions of reforming methane and carbon dioxide to convert the methane and the carbon dioxide into the hydrogen, high-temperature waste heat which is difficult to utilize is converted into chemical energy, and high calorific value substances such as the hydrogen and the like are simultaneously obtained; the sizes of steel and iron slag granulated particles can be controlled through process conditions of mixed gas flow rate, subsequent ball milling and the like by the method; and because the steel and iron slag contains a large quantity of alkaline substances such as calcium oxide and the like, after the temperature of molten slag is reduced, excess carbon dioxide gas can be absorbed by the steel and iron slag in a ball milling device so as to have a fixing effect on the carbon dioxide, and the steel and iron slag after carbon fixing can be further used as a building material or a land reclamation material.

Description

technical field [0001] The invention belongs to the field of energy-saving and emission-reduction technology, and provides a method for effectively converting waste heat of metallurgical slag into chemical energy through gas reforming reaction rich in methane to produce hydrogen. technical background [0002] At present, the utilization of metallurgical industry waste slag in my country is limited to industrial slag that has been cooled and condensed at room temperature, such as: solid dry (block) slag is used to build roads, railways, foundation projects, raw materials for smelting mineral wool or as concrete Aggregate and water-quenched slag are used as cement mixture (filler), and a small amount of slag is converted into expanded beads and used as lightweight aggregate for building materials. However, the heat energy released by these metallurgical slags from the cooling process in the original high-temperature molten state has not been utilized at all. At the same time, ...

Claims

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Application Information

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IPC IPC(8): C01B3/48
CPCY02P20/129
Inventor 张军玲袁章福吕兴梅赵宏欣高洁
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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