A kind of low-quality coal segmental coupled gasification device and gasification method

A technology of gasification device and low-quality coal, which is applied in the direction of granular/powdered fuel gasification, joint combustion relief, and production of combustible gas. Strong adaptability, reduced energy consumption, and improved applicability

Active Publication Date: 2018-07-03
HARBIN INST OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The present invention aims to solve the problems of poor raw material adaptability of existing gasification devices, especially for low-quality coal, which is difficult to achieve economical, reliable, clean, high-efficiency gasification and difficult to balance with device amplification. The present invention provides a low-quality coal segmented coupling Gasification device and gasification method

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  • A kind of low-quality coal segmental coupled gasification device and gasification method
  • A kind of low-quality coal segmental coupled gasification device and gasification method
  • A kind of low-quality coal segmental coupled gasification device and gasification method

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specific Embodiment approach 2

[0073]Specific implementation mode two: see figure 1 To illustrate this embodiment, the difference between this embodiment and the staged coupled gasification device for low-quality coal described in Embodiment 1 is that the optimum working temperature of the cyclone gasifier 5 is 1250°C.

[0074] In this embodiment, the equilibrium analysis shows that when municipal solid waste MSW is used as raw material, when the working temperature of the twin-vortex fast fluidized bed is 600°C, the optimum working temperature of the cyclone gasification furnace 5 is 1253°C, and the carbon conversion rate is as high as 98.9%, oxygen consumption is about 0.287, cold gas efficiency is about 82%.

[0075] Specific implementation mode three: see figure 1 with figure 2 To illustrate this embodiment, the difference between this embodiment and the staged coupled gasification device for low-quality coal described in Embodiment 1 is that the twin-vortex fast fluidized bed 2 is divided into two p...

specific Embodiment approach 9

[0091] Specific embodiment nine: adopt the gasification method realized by a kind of low-quality coal segmental coupling gasification device described in specific embodiment one, the specific process of this method is:

[0092] Step 1: Pass the inferior coal particles with a diameter less than 10mm through the feeding device 1 with N 2 or CO 2 Pressurize to 4MPa and send it into the twin-vortex fast fluidized bed 2, and at the same time feed the gasification agent tangentially through the No. 1 gasification agent inlet 2-1 at the bottom of the double-vortex fast fluidized bed 2, 2. The internal working temperature is within the range of 500°C to 980°C. The low-quality coal particles are pyrolyzed, and the raw coal gas generated spirals upward in the double-vortex fast fluidized bed 2 and is sprayed into the cyclone gasifier 5;

[0093] Step 2: Keep the working temperature of the cyclone gasifier 5 within the range of 1200°C to 1300°C, feed raw coal gas and gasification agent ...

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Abstract

A sub-stage coupled gasification device and gasification method for low-quality coal, relating to the field of clean energy technology. It solves the problems of poor raw material adaptability of the existing gasification device, especially for low-quality coal, which is difficult to achieve economical, reliable, clean, high-efficiency gasification and difficult to balance with device enlargement. It includes a feeding device, a double-vortex fast fluidized bed, a circulating pump, a dust removal device, a cyclone gasifier and a water cooling jacket. The water cooling jacket is wrapped on the outer wall of the cyclone gasifier, and the bottom of the cyclone gasifier is equipped with a The slag machine and the slag crusher are used to crush the slag falling to the bottom of the cyclone gasifier and discharge it out of the cyclone gasifier; the double-vortex fast fluidized bed is specially used for fluidizing, crushing, Pyrolysis to produce raw coal gas; the cyclone gasifier is specially used to convert the raw coal gas introduced from the double-vortex fast fluidized bed at 1200 ℃ ~ 1300 ℃ carbon conversion, and finally realize the segmented coupled gasification of inferior coal. It is mainly used for gasification of low-quality coal.

Description

technical field [0001] The invention relates to the technical field of clean energy. Background technique [0002] Coal gasification technology is the foundation of modern coal chemical industry. It is the core technology for producing oil products through indirect coal liquefaction or producing methanol, synthetic oil, methane, etc. from syngas, and producing ethylene, propylene and other chemical products from methanol. . As the "leading" device in the coal chemical industry chain, the coal gasification device has the characteristics of large investment, high reliability requirements, and great impact on the economic benefits of the entire industrial chain. At present, there are many gasification technologies at home and abroad, and each technology has its own characteristics and specific applicable occasions. There are differences in their industrial application degree and reliability. The development of low-quality coal and new coal gasification technology suitable for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/48C10J3/58C10J3/84
CPCY02E20/18
Inventor 孙锐刑春礼朱文堃赵广播
Owner HARBIN INST OF TECH
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