Hydrolysis kettle continuous material feeding and discharging production process in gas-phase furfural production

A production process and hydrolysis kettle technology, applied in the field of furfural production

Inactive Publication Date: 2021-09-10
镇江市昌达机械有限公司
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Problems solved by technology

[0004] Aiming at the problem that 95% of the furfural production industry in the above background technology adopts the sulfuric acid catalysis method to remove the generated furfural by stripping, and the hydrolysis process is intermittent, the present invention proposes a gas phase that can block the pressurized steam and can continuously enter and exit the material device. Production process of continuous feed and discharge materials in hydrolysis kettle in furfural production

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  • Hydrolysis kettle continuous material feeding and discharging production process in gas-phase furfural production

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Embodiment Construction

[0014] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. The described embodiments are only illustrations and explanations of the present invention, and do not constitute the only limitation of the present invention.

[0015] Such as figure 1 As shown, a production process for continuously entering and exiting materials from a hydrolysis kettle in the production of gas-phase furfural of the present invention comprises the following steps. Under the action of gravity, the material naturally falls to the feeding port of the acid-mixing screw feeder. During the stirring process of the acid-mixing screw feeder, dilute sulfuric acid is added to acidify the corncob material, and then it is transported to the feeder through the acid-mixing screw feeder. The feeding port of the feeding device, the material is squeezed into the hydrolysis kettle through the feeding screw with compression ratio i...

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Abstract

The invention discloses a hydrolysis kettle continuous material feeding and discharging production process in gas-phase furfural production, and belongs to the technical field of furfural production. The invention aims at the problems that 95% of the existing furfural production industry adopts a sulfuric acid catalysis method, the generated furfural is removed by steam stripping, and the hydrolysis process is intermittent, and the root reason is that the feeding and discharging of a hydrolysis kettle are intermittent. The invention relates to the production process for realizing continuous and stable feeding and discharging of materials in a hydrolysis kettle by using a device capable of blocking pressurized steam and continuously feeding and discharging the materials. Due to continuous feeding and discharging of the hydrolysis kettle, three independent processes of loading, reacting and unloading of the hydrolysis kettle can be omitted, so that loading, reacting and unloading of the hydrolysis kettle are carried out at the same time, and the production period is greatly shortened.

Description

technical field [0001] The invention belongs to the technical field of furfural production, and in particular relates to a production process for continuously feeding and discharging materials into and out of a hydrolysis tank in gas-phase furfural production. Background technique [0002] At present, 95% of furfural manufacturers in my country use sulfuric acid catalysis to strip and remove the generated furfural. Its production process is as follows: first select corncob raw materials without rot and deterioration, crush them to a certain particle size, mix them with dilute sulfuric acid with a mass fraction of 5%, and then add them to the hydrolysis kettle, and close the hydrolysis kettle after reaching a certain amount. Valve, at this time, saturated steam is passed into the kettle to form an acidic hydrolyzate. The pressure in the kettle is about 0.7-0.9mpa, and the temperature is about 145°C-230°C. After about 2h-4h of hydrolysis reaction, aldehyde gas is generated, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D307/50B01J19/00B01J4/00B01D3/14
CPCC07D307/50B01J19/00B01J4/001B01D3/14
Inventor 邱剑峰
Owner 镇江市昌达机械有限公司
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