A kind of low-quality coal water-cooled fireplace segmented coupled gasification device and gasification method

A gasification device and low-quality coal technology, applied in the direction of granular/powdered fuel gasification, combustible gas production, joint combustion mitigation, etc., can solve the problem of non-adjustable H2/CO ratio, high initial investment and operating costs, and load adaptability Low-level problems, to achieve the effect of improving slagging characteristics, strong adaptability of raw materials, and improving applicability

CN106221814BActive Publication Date: 2019-04-16HARBIN INST OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-04-16

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Abstract

The invention discloses a segmented coupling and gasification device and method of a fault coal water-cooling fireplace and relates to the technical field of clean energy coal gasification. The problem that an existing gasification device is poor in material adaptability, low in load adaptability, high in oxygen consumption, low in carbon conversion rate, difficult to enlarge and high in preliminary investment and operating cost, makes a slag film thin and non-uniform, needs a standby furnace and makes H2 / CO proportion non-adjustable is solved. The gasification device comprises a charging device, a double-vortex rapid fluidized bed, a gasified gas circulating pump, a cyclone gasification furnace, a water-cooling system, a chilling device and a slag crusher. The gasification method comprises the steps that single-segment gasification is decomposed into two-segment gasification for pyrolysis, carbon conversion and serial coupling, the double-vortex rapid fluidized bed is special used for fluidization, crushing and pyrolysis of low-temperature-segment solid particle material to form raw gas, the cyclone gasification furnace is specially used for weak whirling, combustion and gasification of the raw gas at a high-temperature segment and achieves carbon conversion. The segmented coupling and gasification device and the method are mainly used for clean, efficient, economic and reliable segmented coupling and gasification of low-melting-point fault coal, biomass and their mixtures.
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Description

Technical field

[0001] The invention relates to the technical field of clean energy coal gasification, in particular to a sub-coupling gasification device and a gasification method for inferior coal-water-cooled fireplaces. Background technique

[0002] Coal gasification technology is the foundation of modern coal chemical industry. It is the core of the indirect liquefaction of coal to produce oil, gasification gas as raw material to produce methanol, synthetic oil, methane, etc., and methanol as raw material to produce ethylene, propylene and other chemical products. technology. As the "leading" device in the coal chemical industry chain, the coal gasification device has the characteristics of large investment, high reliability requirements, and a large impact on the economic benefits of the entire industrial chain. At present, there are many gasification technologies at home and abroad, and various technologies have their characteristics and specific application occasions, an...

Examples

specific Embodiment approach 2

[0085] Specific implementation manner two: see figure 1 To illustrate this embodiment, the difference between this embodiment and the inferior coal-water-cooled fireplace segment-coupled gasification device described in the first embodiment is that the optimal working temperature of the cyclone gasifier 5 is 1550°C.

[0086] In this embodiment, the balance analysis shows that when the Inner Mongolia lignite is used as the raw material, when the working temperature of the double-vortex fast fluidized bed is 800°C, the optimal working temperature of the cyclone gasifier 5 is 1554°C, and the carbon conversion rate is as high as 98.9%. The oxygen consumption is 0.301, the effective gas ratio is 96.8%, and the cold gas efficiency is 83%.

[0087] Specific implementation mode three: see figure 1 with figure 2 To illustrate this embodiment, the difference between this embodiment and the inferior coal-water-cooled fireplace segment-coupled gasification device described in the first embodim...

specific Embodiment approach 9

[0102] Embodiment 9: The difference between this embodiment and the inferior coal-water-cooled fireplace segment-coupled gasification device described in Embodiment 1 is that the water-cooling system 6 adopts a natural circulation mode for forced circulation operation, wherein the vertical pipe Water wall 6-6 can be replaced by coiled forced circulation water wall.

specific Embodiment approach 10

[0103] Specific embodiment ten: The difference between this embodiment and the inferior coal-water-cooled fireplace segment-coupled gasification device described in the third embodiment is that the inlet of No. 1 gasification agent from the double vortex fast fluidized bed 2 The gas entering 2-1 moves from bottom to top in a spiral shape.