Coal direct hydropyrolysis method
A hydropyrolysis and direct technology, applied in the field of coal chemical industry, can solve the problems of reduced production capacity, high reaction pressure, complex process, etc., achieve low operating costs, mild reaction conditions, and realize the effect of recycling
Active Publication Date: 2019-05-17
SINOPEC NINGBO ENG +2
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Problems solved by technology
[0003] In the existing coal direct liquefaction technology, the reaction pressure of the reactor is as high as 17MPa-30Mpa, and the hydrogen consumption is as high as 6%-10%. The process is complicated and the investment cost is high
In the process, not only a large amount of new hydrogen needs to be added, but also circulating oil is required as a hydrogen supply solvent, the production capacity of the device is reduced, the product composition of the liquefaction reactor is complicated, the solid-liquid two-phase separation is difficult, and the oil production rate is low
Method used
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Embodiment Construction
[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0034] Such as Figure 1 to Figure 5 As shown, the main reactor used in this embodiment is a gasifier 1, the top of the gasifier 1 is provided with a gasification nozzle 2, and the bottom of the gasifier is provided with a slag outlet 14; And the bottom is divided into gasification chamber 11, pyrolysis chamber 15 and quenching chamber 13 successively.
[0035] Wherein, the bottom surface of pyrolysis chamber 15 is inclined with respect to the side wall of gasification furnace 1; The lowest position for easy discharge.
[0036] The bottom of the gasification chamber 11 has a conical structure, and its bottom outlet 16 is a bell mouth with a small upper part and a larger lower part.
[0037] The downcomer 12 connects the gasification chamber 11 and the quenching chamber 13, and is the descending channel of the slag; its lower port passes thr...
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Abstract
The invention relates to a direct coal hydropyrolysis method. According to the method, coal powder from a coal grinding device is conveyed to a gasification nozzle and a pulverized coal nozzle of a gasification furnace by a coal powder conveying device, steam generated by a steam drum, oxygen from a battery limit and the coal powder enter a gasification chamber to react to generate high-temperature hydrogen-enriched synthesis gas and coal cinders, the coal cinders enter a quenching chamber along a descending pipe, the synthesis gas enter a pyrolysis chamber by the aid of spray holes, the synthesis gas and coal powder from a pulverized coal burner react, generated oil gas and generated coke enter a cyclone separator, the coke and the oil gas are separated, the oil gas and boiler water exchange heat and then the oil gas enters an oil and gas separating device, oil products and combustible gas are separated, the combustible gas enters a gas purification device, synthesis gas and fuel gas are separated, the fuel gas is conveyed to a coal grinding unit, the boiler water after heat exchange enters a cold wall of the gasification furnace, heat is absorbed to generate a steam water mixture, the steam water mixture enters the steam drum, steam and water are separated, and the steam is conveyed to the gasification nozzle.
Description
technical field [0001] The invention relates to coal chemical industry, in particular to a coal direct hydropyrolysis method. Background technique [0002] The direct coal hydrogenation process mainly includes coal crushing and drying, coal slurry preparation, hydrogenation liquefaction, solid-liquid separation, gas purification, fractionation and refining of liquid products, and hydrogen production. The main process is: under high temperature and high pressure, the coal in the high-concentration coal slurry undergoes pyrolysis, undergoes hydrogenation and decomposition under the action of a catalyst, and finally becomes a stable liquid molecule. During the liquefaction process, the coal slurry made of coal, catalyst and cycle oil is mixed with the hydrogen produced and sent to the reactor. In the liquefaction reactor, coal first undergoes a pyrolysis reaction to generate free radical "fragments", and the unstable free radical "fragments" combine with hydrogen in the presen...
Claims
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IPC IPC(8): C10J3/46C10J3/48C10J3/50C10J3/62C10J3/66C10J3/84C10B49/04C10B53/04C10G1/06
CPCC10B49/04C10B53/04C10G1/06C10J3/46C10J3/48C10J3/50C10J3/62C10J3/66C10J3/84C10J2200/152C10J2300/0906C10J2300/093C10J2300/0959C10J2300/0976Y02P20/10
Inventor郭强赵国忠李克海杨松峰王鲁杰李峰吴德民曹孟常吴妙奇陈文哲
OwnerSINOPEC NINGBO ENG