Microwave heating technology
one, Â Â Â Â Â Â Â Â Â Â Â Development of Microwave Heating Technology
two, Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Microwave technology was first applied to communication, broadcasting and television technologies. In these fields, microwaves are used as a carrier for information or information. In the decades of application of microwave communication engineering, the discovery has always been accompanied by a harmful factor , the thermal effect , which causes the loss of microwave energy and needs to be prevented and eliminated . As early as 1945 , some people in the United States proposed to use the heat effect of microwaves to heat materials. Then there are a lot of people on this issue - microwave - was not of exploration, testing and research. Until the end of the sixties.
Microwave energy has finally been used as an energy source for heating, drying, insecticidal, sterilization, medical and Other industrial projects. The first was in the food industry, and the advent of household microwave ovens further expanded the application of microwave heating technology. Now, microwave heating as a new technology has been highly valued and applied by various disciplines.
Overseas research and academic exchanges on microwave energy applications have been very active and important. Established in 1966 Aerbotai (Alberta) city in North America, Canada's International Microwave Power Institute (referred to IMPI), to hold a symposium every year, and regularly publish the quarterly "Microwave Power Magazine" ( "The Joural of Microwve Power ").
In the 1970s , China began to work on the application of microwave energy. In 1973 , research on the application of microwave heating technology and the development of magnetrons for microwave heating were started. In 1974 and 1980 , the Ministry of Electronics Industry held the “ National Microwave Energy Promotion and Application Technology Exchange Conference †to exchange microwave academic and applied technical issues. 81 3 menstrual approved by the Ministry of the four planes, deployed forces affiliated to the Ministry of Science and Technology, was established - China Electronic Devices Corporation promote the use of microwave energy station, responsible for the country promote the use of microwave energy organization, design research. In October 1983 , the Chinese Institute of Electronics held the first " National Academic Conference on Microwave Energy Application " . Every two years afterwards, in areas where the country has chosen to promote the use of microwaves, it will take turns to organize microwave application technology exchanges in order to promote the development of the domestic microwave industry. Each edition has a collection of essays, covering the fields of application in industry, agriculture, medicine, and scientific research.
At present , China has gradually adopted microwave technology in industries such as leather, wood, color printing, food, paper, chemicals, ceramics, pharmaceuticals, tobacco leaf, building materials, rubber, and medical treatment, and has achieved good economic benefits. As a new processing method, microwave energy technology has formed a great impact on technological transformation and equipment renewal in various industries. Especially at the present stage, what is facing the managers is to solve the problem of product structure and social needs, and to adapt to the social development of product quality and variety requirements. One of its focuses is the lack of technological innovation and the lag in quality upgrading. The emergence of microwave technology provides good conditions for improving product quality, keeping pace with technological progress, and creating high value-added products.
1, food industry
People use food as their food. The food industry is a pillar industry that has rapidly emerged in China. Use microwaves to expand, dry, remove, and preserve foods. It has been used in the production of pastries, beef jerky, potato chips, dried fish fillets, salted duck, cashew nuts, peanuts, seeds, and soybeans. Each year, our company produces 50 to 60 sets of microwave equipment for the food industry.
2, wood processing
The microwave can evenly and quickly dry the wood boards of 1-6 cm thick. It only takes ten minutes to dry and it does not crack or deform. It also kills the worms and larvae inside the wood. It can also be used on plywood or glue. Followed by the curing process; bamboo products dry, mildew sterilization.
3, rubber industry
Japan uses a microwave heating device of 2450 MHz and 5 to 10 kw to heat the tire once. After heating up to the curing temperature, it is heated with hot air to cure 3 to 4 tons of tires. In the United States, 915 MHz and 50 kw horn antennas are used as radiant heaters. Rotary scanning of large tires has the advantage of uniform heating and a one-third reduction in curing time. The microwave equipment developed by our company is used for the continuous vulcanization of ordinary rubber strips or strips with metal skeletons in Fujian, and the quality is comparable to that of imported equipment. The price is one third of that.
4, insecticidal sterilization
Microwaves can be used to sterilize insecticides at lower temperatures. Deal with food, medicines, tobacco, wood, etc. At 70 ~ 80 °C can play a role in insecticidal sterilization. And the heating rate is fast, not affected by the thickness and shape of the material.
5, desulfurization
Sulfur in raw coal appears as pyrite. Pyrite has a higher loss tangent than coal. Therefore, microwaves can selectively heat pyrite and react with gas to desulfurize. And coal is not affected. The ideal method is to intermittently heat the pulse wave with a duration of 0.1 seconds to heat the pyrite to a high temperature of about 650 °C . This method has good sulfur removal effect, does not require expensive catalysts, saves money, has high energy efficiency, and has a low environmental pollution.
6, microwave plasma technology
Microwave plasma technology has been used in semiconductor production processes for etching, sputtering, vapor deposition, and silicon oxide wafers; it can also be used for surface treatment of metals, alloys, and non-metals; for plasma spectroscopy, more than a dozen types can be detected. element.
7, medical
Microwave biological effects, sub-thermal effects and non-thermal effects. The thermal effect in the medical treatment of microwave physiotherapy, radiotherapy and chemotherapy for dialysis cancer treatment; in addition can also use microwave heating plasma, thawed chilled organs; microwave scalpel can also be designed to open the knife to stop bleeding faster, less bleeding.
8, measurement
Microwave measurement accuracy, suitable for continuous measurement and automatic control in production. Has been widely used in distance measurement, temperature measurement, thickness measurement, speed and other aspects.
9, ceramic sintering
The microwave can perform uniform densification of the ceramic sintered, the maximum temperature can reach 2000 °C , to obtain large-size fine ceramics.
10, chemical industry
Microwaves have a wide range of applications in chemistry, such as microwave digestion, extraction, hydrolysis, and catalytic reactions.
Microwave energy has finally been used as an energy source for heating, drying, insecticidal, sterilization, medical and Other industrial projects. The first was in the food industry, and the advent of household microwave ovens further expanded the application of microwave heating technology. Now, microwave heating as a new technology has been highly valued and applied by various disciplines.
Overseas research and academic exchanges on microwave energy applications have been very active and important. Established in 1966 Aerbotai (Alberta) city in North America, Canada's International Microwave Power Institute (referred to IMPI), to hold a symposium every year, and regularly publish the quarterly "Microwave Power Magazine" ( "The Joural of Microwve Power ").
In the 1970s , China began to work on the application of microwave energy. In 1973 , research on the application of microwave heating technology and the development of magnetrons for microwave heating were started. In 1974 and 1980 , the Ministry of Electronics Industry held the “ National Microwave Energy Promotion and Application Technology Exchange Conference †to exchange microwave academic and applied technical issues. 81 3 menstrual approved by the Ministry of the four planes, deployed forces affiliated to the Ministry of Science and Technology, was established - China Electronic Devices Corporation promote the use of microwave energy station, responsible for the country promote the use of microwave energy organization, design research. In October 1983 , the Chinese Institute of Electronics held the first " National Academic Conference on Microwave Energy Application " . Every two years afterwards, in areas where the country has chosen to promote the use of microwaves, it will take turns to organize microwave application technology exchanges in order to promote the development of the domestic microwave industry. Each edition has a collection of essays, covering the fields of application in industry, agriculture, medicine, and scientific research.
At present , China has gradually adopted microwave technology in industries such as leather, wood, color printing, food, paper, chemicals, ceramics, pharmaceuticals, tobacco leaf, building materials, rubber, and medical treatment, and has achieved good economic benefits. As a new processing method, microwave energy technology has formed a great impact on technological transformation and equipment renewal in various industries. Especially at the present stage, what is facing the managers is to solve the problem of product structure and social needs, and to adapt to the social development of product quality and variety requirements. One of its focuses is the lack of technological innovation and the lag in quality upgrading. The emergence of microwave technology provides good conditions for improving product quality, keeping pace with technological progress, and creating high value-added products.
1, food industry
People use food as their food. The food industry is a pillar industry that has rapidly emerged in China. Use microwaves to expand, dry, remove, and preserve foods. It has been used in the production of pastries, beef jerky, potato chips, dried fish fillets, salted duck, cashew nuts, peanuts, seeds, and soybeans. Each year, our company produces 50 to 60 sets of microwave equipment for the food industry.
2, wood processing
The microwave can evenly and quickly dry the wood boards of 1-6 cm thick. It only takes ten minutes to dry and it does not crack or deform. It also kills the worms and larvae inside the wood. It can also be used on plywood or glue. Followed by the curing process; bamboo products dry, mildew sterilization.
3, rubber industry
Japan uses a microwave heating device of 2450 MHz and 5 to 10 kw to heat the tire once. After heating up to the curing temperature, it is heated with hot air to cure 3 to 4 tons of tires. In the United States, 915 MHz and 50 kw horn antennas are used as radiant heaters. Rotary scanning of large tires has the advantage of uniform heating and a one-third reduction in curing time. The microwave equipment developed by our company is used for the continuous vulcanization of ordinary rubber strips or strips with metal skeletons in Fujian, and the quality is comparable to that of imported equipment. The price is one third of that.
4, insecticidal sterilization
Microwaves can be used to sterilize insecticides at lower temperatures. Deal with food, medicines, tobacco, wood, etc. At 70 ~ 80 °C can play a role in insecticidal sterilization. And the heating rate is fast, not affected by the thickness and shape of the material.
5, desulfurization
Sulfur in raw coal appears as pyrite. Pyrite has a higher loss tangent than coal. Therefore, microwaves can selectively heat pyrite and react with gas to desulfurize. And coal is not affected. The ideal method is to intermittently heat the pulse wave with a duration of 0.1 seconds to heat the pyrite to a high temperature of about 650 °C . This method has good sulfur removal effect, does not require expensive catalysts, saves money, has high energy efficiency, and has a low environmental pollution.
6, microwave plasma technology
Microwave plasma technology has been used in semiconductor production processes for etching, sputtering, vapor deposition, and silicon oxide wafers; it can also be used for surface treatment of metals, alloys, and non-metals; for plasma spectroscopy, more than a dozen types can be detected. element.
7, medical
Microwave biological effects, sub-thermal effects and non-thermal effects. The thermal effect in the medical treatment of microwave physiotherapy, radiotherapy and chemotherapy for dialysis cancer treatment; in addition can also use microwave heating plasma, thawed chilled organs; microwave scalpel can also be designed to open the knife to stop bleeding faster, less bleeding.
8, measurement
Microwave measurement accuracy, suitable for continuous measurement and automatic control in production. Has been widely used in distance measurement, temperature measurement, thickness measurement, speed and other aspects.
9, ceramic sintering
The microwave can perform uniform densification of the ceramic sintered, the maximum temperature can reach 2000 °C , to obtain large-size fine ceramics.
10, chemical industry
Microwaves have a wide range of applications in chemistry, such as microwave digestion, extraction, hydrolysis, and catalytic reactions.
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