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A microwave heating device for fluid material and its intelligent control method

A technology for microwave heating devices and fluid materials, which is applied in microwave heating, electric heating devices, electric/magnetic/electromagnetic heating, etc., can solve the problems of uneven heating of materials, limitations, and complicated automatic control, and achieve controllable heating. improved stability, improved batch stability, and uniform heating distribution

Active Publication Date: 2021-11-09
KUNMING UNIV OF SCI & TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although microwave heating technology has been widely used, it is mainly used for static material heating, such as household microwave ovens, but it is rarely used in material industrial processing, mainly limited by existing technology and equipment, especially for continuous and uninterrupted fluid There are few researches on direct heating of materials. Microwave heating fluid currently has problems such as uneven distribution of electromagnetic field, uneven heating of materials, poor stability of product batches, complicated automatic control, and low applicability.

Method used

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  • A microwave heating device for fluid material and its intelligent control method
  • A microwave heating device for fluid material and its intelligent control method
  • A microwave heating device for fluid material and its intelligent control method

Examples

Experimental program
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Effect test

Embodiment 1

[0044] The equipment described in this device is used for liquid heat treatment, the liquid supply flow is adjusted to 400ml / min, the total power of the microwave is adjusted to 3.5kW, the magnetron is turned on, and the power from top to bottom is 2kW, 0.7kW, 0.8kW, Heating is carried out after the heating liquid is supplied, and the target liquid is heated to a predetermined temperature, and the pressure in the feed liquid pipe 11 of the heating chamber is maintained within the range of 1-1.5 atm. This method is used, for example, for the sterilization of liquids. The specific method and operation steps are as follows:

[0045] First, the liquid to be processed is added into the raw material tank 1 through the feed port 2 of the raw material tank, and the raw material tank 1 and the stirring device 3 are opened to preheat the liquid. During the preheating process, the temperature measuring device 6 is used to measure the temperature. The parameters are fed back to the control...

Embodiment 2

[0048] The equipment described in this device is used for liquid heat treatment, the liquid supply flow is adjusted to 1200ml / min, the total power of the microwave is adjusted to 6kW, the magnetron is turned on, the power from top to bottom is 3kW, 1.5kW, 1.5kW, and the supply After the liquid is heated, it is heated to heat the target liquid to the rated temperature, and the pressure in the feed liquid pipe 11 of the heating chamber is maintained within the range of 1-1.5 atm. For example, this method is used for heating pretreatment of ethylene glycol-carbon black slurry. The specific method and operation steps are as follows:

[0049] First, put the ethylene glycol-carbon black mixed slurry to be processed into the raw material tank 1 through the feed port 2 of the raw material tank, open the raw material tank 1 and the stirring device 3 to preheat the liquid, during the preheating process, use temperature measurement Equipment 6 measures the temperature, the preheating te...

Embodiment 3

[0052] The equipment described in this device is used for liquid heat treatment, the liquid supply flow rate is adjusted to 1200ml / min, the total power of the microwave is adjusted to 2kW, the magnetron is turned on, the power from top to bottom is 1kW, 0.4kW, 0.6kW, and the supply After the liquid is heated, it is heated to heat the target liquid to the rated temperature, and the pressure in the feed liquid pipe 11 of the heating chamber is maintained within the range of 1-1.5 atm. For example, the method is used for the liquid phase synthesis of nanomaterials. The specific method and operation steps are as follows:

[0053] Firstly, the nano-material mixed liquid to be processed is added to the raw material tank 1 through the feed port 2 of the raw material tank, and the raw material tank 1 and the stirring device 3 are opened to preheat the mixed material liquid. During the preheating process, the temperature measuring device 6 is used Measure the temperature, set the preh...

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Abstract

The invention discloses a microwave heating device for fluid materials and an intelligent control method thereof, wherein the microwave processing device includes a microwave resonant heating cavity, a material liquid pipe arranged in the heating cavity, and vertically arranged on the heating cavity at a certain interval. Multiple microwave generators and a monitoring system connected to the microwave generators; its intelligent control method is to use PID algorithm or other algorithms to couple the microwave transmission power with the difference between the measured temperature of the reaction system and the set temperature, By adjusting the input power of each magnetron, the set temperature of each part is gradually approached. The invention belongs to the continuous pipeline reaction mode, with fast heating speed, controllable temperature gradient of the material liquid in the reaction pipeline, and long-term stability of the temperature of the material liquid at the outlet within plus or minus 0.5°C of the set value, so that the stability of product batches is greatly improved. It is suitable for many fields such as organic synthesis, fluid sterilization, wastewater treatment, powder preparation, etc.

Description

technical field [0001] The invention belongs to the technical field of microwave heating, and in particular relates to a microwave heating device for fluid materials and an intelligent control method thereof. Background technique [0002] Microwave has been widely used in communication, chemical industry, metallurgy, electronics and other related industries since its discovery in the 20th century. Under the action of microwave heating, the internal electrical loss and magnetic loss of the material make the electromagnetic energy quickly transform into heat energy. Compared with traditional heating methods, microwave heating has the characteristics of short time, fast speed, strong selectivity, low energy consumption, small footprint, and high degree of automation. . Although microwave heating technology has been widely used, it is mainly used for static material heating, such as household microwave ovens, but it is rarely used in material industrial processing, mainly limit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B6/64H05B6/68
CPCH05B6/6402H05B6/68
Inventor 巨少华钟发平田时泓符长平周昱王玲杨永超闫忠强朱济群周波
Owner KUNMING UNIV OF SCI & TECH