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Environment-friendly dicarbonate cyclic reaction system

A cyclic reaction and carbonate technology, which is applied to carbon compounds, non-metallic elements, and the manufacture of combustible gases, etc., can solve the problems that the activated carbon pickling solution cannot be reused, the molten salt cannot be directly recycled, and the process is cumbersome. The effect of simplifying the mechanical separation process, reducing the production of tar, and low cost

Pending Publication Date: 2020-12-25
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of producing activated carbon from biomass gasification, since the activated carbon is evenly distributed in the molten salt, the general mechanical separation method is to scrape off the coarse activated carbon product on the surface of the salt cake after the molten salt is cooled to form a salt cake, so as to realize the separation of activated carbon and molten salt. The separation of the main body, the process is cumbersome
Moreover, the activated carbon pickling solution cannot be reused, and the molten salt cannot be directly recycled in the system, which has the disadvantage of high energy consumption.

Method used

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  • Environment-friendly dicarbonate cyclic reaction system

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Put 200g of sodium carbonate and potassium carbonate mixture (i.e. molten salt) with a mass ratio of 55.5:44.5 as the heat medium and catalyst (melting point is 710.3°C), and put it into the reaction kettle through the gap of the turntable, and start the side wall heating jacket and bottom The jacket was heated to raise the temperature of the reactor to 750°C. To maintain an oxygen-free atmosphere, the coil pipe is extended into the molten salt to feed water vapor with a flow rate of 10 g / h, and 10 g of crushed and dried Chinese fir chips are added to the reactor, and the Chinese fir chips are carbonized in the reactor at 750 °C / Activate for 15 minutes, and continuously discharge the pyrolysis gas generated by the reaction from the pyrolysis gas outlet on the upper part of the reactor. The gasification rate of Chinese fir chips is between 78.6%-81.3% (mass percent), and the synthesis gas (H 2 and CO) volume percentage between 79.2%-84.7%, H in syngas 2The volume rat...

Embodiment 2

[0058] 200g of sodium carbonate and potassium carbonate mixture (i.e. molten salt) with a mass ratio of 55.5: 44.5 is used as heat medium and catalyst (melting point is 710.3°C), and is added to the reaction kettle through the opening of the turntable to start the side wall and bottom heating jacket to raise the temperature to 750°C. To maintain an oxygen-free atmosphere, the coil pipe is extended below the molten salt liquid surface to pass in water vapor with a flow rate of 10 g / h, and 10 g of warp-knitted waste leather cut into uniform small pieces is added to the reaction kettle, and the decoking reaction is continued for 20 hours Within the period, the decoking efficiency remained stable, and the test results showed that the tar yield decreased by more than 95%, and the gas yield increased by more than 15%.

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Abstract

The invention discloses an environment-friendly dicarbonate cyclic reaction system which comprises a reaction system, a spraying system, a delivery pump, a filter and a membrane separator, and the reaction system comprises a reaction kettle. Molten salt is contained in the reaction kettle, a biomass feeding port, a molten salt inlet, a gasifying agent inlet and a pyrolysis gas outlet are formed inthe upper portion of the reaction kettle, an overflow port is formed in the upper portion of the side wall of the reaction kettle, and the liquid level of the molten salt in the reaction kettle is slightly higher than the overflow port. An overflow port of the reaction kettle is connected with the spraying system through an overflow pipe, activated carbon generated by reaction in the reaction kettle can overflow into the spraying system along with molten salt, the spraying system sprays clear water for washing and filtering, wet activated carbon filter residues are dried to obtain an activated carbon product, and filtrate is desalted by a membrane separator to obtain a purified activated carbon product. The obtained concentrated salt solution is recycled to the reaction kettle. The cyclicuse of water vapor and molten salt in a reaction system is achieved, the reaction is strengthened, the process is simplified, and meanwhile the advantages of being environmentally friendly, capable of saving energy and free of consumption are achieved.

Description

technical field [0001] The application belongs to the field of biomass gasification and cracking, and specifically relates to an environment-friendly binary carbonate cycle reaction system. Background technique [0002] In the process of producing activated carbon from biomass gasification, since the activated carbon is evenly distributed in the molten salt, the general mechanical separation method is to scrape off the coarse activated carbon product on the surface of the salt cake after the molten salt is cooled to form a salt cake, so as to realize the separation of activated carbon and molten salt. The separation of the main body is complicated. Moreover, the activated carbon pickling solution cannot be reused, and the molten salt cannot be directly recycled in the system, which has the disadvantage of high energy consumption. Therefore, there is an urgent need for an environmentally friendly binary carbonate cycle reaction system. Contents of the invention [0003] I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/57C10J3/72C01B32/324C01B32/348
CPCC10J3/57C10J3/72C10J2300/092C10J2300/0976C10J2300/0986C10J2300/1246C10J2300/1625C10J2300/1807C10J2300/1884C01B32/324C01B32/348Y02P20/10Y02P20/145
Inventor 韦一郏曦莹陈益飞沈超越计建炳卢立聪姬登祥
Owner ZHEJIANG UNIV OF TECH