Microwave steam explosion device

A steam explosion device, microwave technology, applied in the chemical/physical/physical chemical process of energy application, raw material pretreatment, chemical instruments and methods, etc., can solve the problems of unstable boiler steam supply and high energy consumption of steam explosion equipment, To achieve the effect of facilitating the analysis of steam explosion mechanism, avoiding manual operation and high stability

Inactive Publication Date: 2011-08-31
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a set of microwave steam explosion technology and equipment for the problems of high energy consumption of existing steam explosion equipment, impurity elements brought by the introduction of steam during the steam explosion process, and unstable supply of boiler steam, etc. Provide external heating steam, and directly use microwave to heat the material, and then suddenly release the pressure and explode after heating for a period of time

Method used

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Experimental program
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Effect test

Embodiment 1

[0014] Microwave cavity 5L. Cut the outdoor air-dried corn stalks into 1-2cm blocks (wherein the water content is 14%), weigh 200g (wet weight), add 144g of water to make the water content 50%, after the moisture is evenly absorbed, carry out Feed valve 1 is put into tank body 3, and feed inlet ball valve 1 is closed. Set the microwave at 200°C (about 1.5MPa) for 5 minutes, and turn on the power switch. When the time is up, the microwave stops heating, and the outlet valve 2 is quickly opened, and the multi-phase materials enter the buffer tank 9 together. After steam-solid separation, the steam enters the condensation system 11 to collect the condensed liquid, and the solid material is released from the buffer tank lower end valve 10. release. The hemicellulose recovery rate of steam-exploded corn stalks was determined to be 65.2%, and the enzymatic hydrolysis rate of cellulose was 59.1%. The temperature and pressure curves displayed in real time can be used for three tran...

Embodiment 2

[0016] Microwave cavity 5L. Cut the outdoor air-dried corn stalks into 1-2cm blocks (wherein the water content is 14%), weigh 200g (wet weight), add 144g of water to make the water content 50%, after the moisture is evenly absorbed, carry out Feed valve 1 is put into tank body 3, and feed inlet ball valve 1 is closed. Set the microwave at 190°C (about 1.2MPa) for 8 minutes, and turn on the power switch. When the time is up, the microwave stops heating, and the outlet valve 2 is quickly opened, and the multi-phase materials enter the buffer tank 9 together. After steam-solid separation, the steam enters the condensation system 11 to collect the condensed liquid, and the solid material is released from the buffer tank lower end valve 10. release. The hemicellulose recovery rate of steam-exploded corn stalks was determined to be 68.2%, and the enzymatic hydrolysis rate of cellulose was 63.1%. The temperature and pressure curves displayed in real time can be used for three tran...

Embodiment 3

[0018] Microwave cavity 5L. Cut the outdoor air-dried corn stalks into 1-2cm blocks (wherein the water content is 14%), weigh 200g (wet weight), add 65g of water to make the water content 35%, and after the moisture is evenly absorbed, carry out Feed valve 1 is put into tank body 3, and feed inlet ball valve 1 is closed. Set the microwave at 190°C (about 1.2MPa) for 8 minutes, and turn on the power switch. When the time is up, the microwave stops heating, and the outlet valve 2 is quickly opened, and the multi-phase materials enter the buffer tank 9 together. After steam-solid separation, the steam enters the condensation system 11 to collect the condensed liquid, and the solid material is released from the buffer tank lower end valve 10. release. The hemicellulose recovery rate of steam-exploded corn stalks was determined to be 83.2%, and the enzymatic hydrolysis rate of cellulose was 69.3%. The temperature and pressure curves displayed in real time can be used for three t...

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Abstract

The invention relates to a microwave steam explosion device which comprises a feed-inlet ball valve, a steam explosion tank, a buffer vessel, and a gas condensation and recovery system, wherein the steam explosion tank is sleeved with a microwave oven cavity, the steam explosion tank is provided with a pressure gauge, a thermometer and a safety valve, and the steam is fed into the gas condensation and recovery system. The microwave oven cavity adopts an integral control system and a staggered and resonant arrangement design on industrial double-magnetrons, continuous output microwaves are obtained by using a high frequency close-loop feedback and magnetron anode current control mode, and through contactless infrared temperature control and contactless optical pressure monitoring, the real-time display of a pressure-temperature-time-power curve and a temperature-pressure-time curve can be realized on an ultra-large touch LCD (liquid crystal display) screen. The device provided by the invention has the advantages that the stream indirect heating is replaced with the microwave direct heating, so that 4 / 5 of the heating time is shortened, therefore, the problem of high energy consumption existing the existing steam explosion technology can be solved, and the requirements of solid materials such as foods and traditional Chinese medicines, and the like for water quality are satisfied; and in addition, because of adopting automatic control, the device is easy to operate, and has good economic and application prospects.

Description

technical field [0001] The invention belongs to a steam explosion device, in particular to a steam explosion device using microwaves as a heat source. Background technique [0002] Steam explosion pretreatment is a pretreatment method developed in recent years. The raw material is heated to 180-235°C with steam, and the pressure is maintained for a certain period of time. When the sudden decompression is sprayed, the liquid water flashes rapidly, generating a large amount of steam, and the volume of the raw material tissue or cell increases sharply. Destruction; In addition, in the pressure maintenance process, there is also the self-catalysis of the raw material itself, and its main components are partially degraded. [0003] The steam explosion technology first started in 1926, when it was produced intermittently, mainly for the production of man-made fiberboard. Beginning in the 1970s, the technology has also been widely used in the production of animal feed and in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/12B01J3/00D21B1/02
Inventor 陈洪章张玉针
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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