Method for carrying out gas-solid fluidized bed reaction

A technology of fluidized bed reactor and circulating fluidized bed, applied in chemical instruments and methods, chemical recovery, organic chemistry, etc., can solve the problems of increasing separation cost and solid waste treatment cost

Active Publication Date: 2016-07-20
SHANGHAI BI KE CLEAN ENERGY TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the catalyst enters the subsequent separation unit,

Method used

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  • Method for carrying out gas-solid fluidized bed reaction
  • Method for carrying out gas-solid fluidized bed reaction

Examples

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Embodiment 1

[0071] In this example, according to figure 1 The reaction system is constructed in the manner shown, wherein the volume of the fluidized bed reactor 1 is 100m 3 , The volume of the regenerator is 30m 3 , The stripping section of the raw catalyst and the stripping section of the regenerated catalyst have a diameter of 0.85m and a length of 5 meters, and the inner diameter of the raw delivery pipe and the regenerated delivery pipe is 0.50m and a length of 25m. The catalyst used in the present invention is the ZSM-5 catalyst synthesized according to the embodiment 1 method of Chinese patent application number CN104069888A patent literature, particle size is 10~120 μ m, average particle diameter 75 μ m, catalyzer once loading capacity 240 tons, catalyst circulation 2.4 tons / Time.

[0072] The raw material used is a mixed gas of methanol and water vapor with a mass ratio of 0.35, the temperature of the mixed gas is 510°C, the pressure is 0.12MPa, and the mass space velocity cal...

Embodiment 2

[0076] In this example, according to figure 2 The reaction system was constructed in the manner shown, and the conditions of Example 2 were the same as those of Example 1 except that the heating mode of the steam heater 9 was different. The difference is that the heat source of the steam heater 9 is provided by high-temperature flue gas, and the heating capacity of the heater is controlled by the temperature of the regenerative stripping section, so that the temperature of the heated steam reaches 475°C.

[0077] In this embodiment, the temperature difference between the gas and the contacting catalyst is less than 50° C., under this condition, the wear of the catalyst is 0.0252% / h, and 97.9 tons of catalyst can be saved every year. See Table 1.

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Abstract

The invention relates to a method for carrying out a gas-solid circulation fluidized bed reaction. The method comprises the following steps: (1) in a fluidized bed reactor, an exothermic reaction is carried out under a condition that a gaseous raw material contacts a solid catalyst, such that a mixed product comprising a gaseous product and the solid catalyst is produced; (2) gas-solid separation is carried out in the upper part of the reactor; a part of the catalyst with charcoal deposit is delivered to a catalyst regenerator; (3) in the catalyst regenerator, the catalyst with charcoal deposit contacts regeneration air, such that a charcoal burning reaction is carried out; catalyst activity is recovered, and flue gas is generated; (4) the regenerated catalyst is delivered to the fluidized bed reactor through a regenerated catalyst delivery pipe; (5) the absolute value of the difference between the temperature of steam used for delivery and stripping and the temperature of the solid catalyst in a regenerated catalyst stripping section is 0-100 DEG C; and the absolute value of the difference between the temperature of delivery air used for delivering and the temperature of the solid catalyst in a spent catalyst stripping section is 0-100 DEG C. With the method, catalyst powdering damage caused by thermal expansion and contraction is effectively reduced.

Description

technical field [0001] The invention relates to the field of fluidized bed reaction technology, more specifically, the invention relates to a method for regulating the overall temperature of gas-solid circulating fluidized bed reaction. Background technique [0002] The gas-solid circulating fluidized bed reactor is a reactor that uses gas to pass through the granular solid layer to make the solid particles in a suspended state and carry out the gas-solid phase reaction process. After the above-mentioned gas-solid phase fluidized bed reaction is carried out, the produced product is sent to the subsequent processing unit in the form of gas phase. At the same time, the solid granular catalyst will be coke-deposited during the reaction process, so the catalyst needs to be continuously transported to the regenerator, and after being regenerated by high-temperature carbon burning, the regenerated catalyst is sent back to the fluidized bed reactor. Compared with fixed bed reactor...

Claims

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Application Information

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IPC IPC(8): B01J8/24C07C11/02C07C1/20
CPCY02P20/584
Inventor 谢苗苗唐登银叶厚盈罗艳宁
Owner SHANGHAI BI KE CLEAN ENERGY TECH
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