Microwave processing equipment for continuous flow liquids
地域：
Wuxi
摘要
The disclosure discloses a microwave processing equipment for continuous flow liquids, and belongs to the technical field of microwave processing. The microwave processing equipment includes a feed preheating section, a microwave heating section and a cooling section. The microwave heating section includes a microwave generation system, a waveguide system, tuners, and a microwave absorption cavity. The waveguide system includes at least two waveguides. Each waveguide is installed at the microwave feed port formed in the outer wall of the microwave absorption cavity according to a predetermined angle greater than or equal to 15° and less than 90°.
說(shuō)明書(shū)
The disclosure relates to a microwave processing equipment for continuous flow liquids, and belongs to the technical field of microwave processing.
Microwaves refer to electromagnetic waves in a frequency range of 300 MHz-300 GHz. Microwaves have been widely used in the technical field of modern radar and communications. In addition, microwaves have become a new technology in the field of processing due to heating characteristics on dielectric substances. Heating is one of the crucial steps in liquids processing and traditional heating methods usually use steam as a main energy source. For example, in the process of milk pasteurization and UHT sterilization, high-pressure steam consumes a large amount of energy, which has low thermal efficiency and brings many hidden safety risks. Therefore, developing new energy sources to replace steam heating have attracted wide attention all around the world. The microwave heating technology is regarded as one of the most promising industrial heating technologies among novel physical field processing technology.
權(quán)利要求
What is claimed is:1. A microwave processing equipment for continuous flow liquid, comprising: a feed preheating section, a microwave heating section and a cooling section;wherein the microwave heating section comprises a microwave generation system, a waveguide system, tuners, and a microwave absorption cavity, the waveguide system comprises at least two waveguides, each waveguide is installed at a microwave feed port formed in an outer wall of the microwave absorption cavity according to a predetermined angle, and the predetermined angle is greater than or equal to 15° and less than 90°; the microwave absorption cavity is a rectangular cavity, a cavity cross-section of each waveguide has the same shape and size as a bottom surface of the microwave absorption cavity, and the bottom surface of the microwave absorption cavity is a surface perpendicular to a material transmission direction; and the microwave processing equipment is configured to perform microwave processing on the continuous flow liquid. 2. The microwave processing equipment according to claim 1 , wherein each waveguide is provided with a tuner, and a reflection coefficient during microwave transmission approaches 0 and a voltage standing wave ratio approaches 1 by adjusting orientation and insertion depth of the tuner. 3. The microwave processing equipment according to claim 2 , wherein the predetermined angle ranges from 30° to 60°. 4. The microwave processing equipment according to claim 1 , wherein inclination directions of the waveguides with respect to a wall surface of the microwave absorption cavity are uniform or partially uniform or different. 5. The microwave processing equipment according to claim 4 , wherein the microwave absorption cavity further comprises a material carrying pipeline therein. 6. The microwave processing equipment according to claim 5 , wherein a rapid temperature rise device is disposed at an inlet of the material carrying pipeline, and the rapid temperature rise device is configured to allow, when a material enters the material carrying pipeline, a temperature to rise rapidly to meet set temperature rise rate requirements. 7. The microwave processing equipment according to claim 6 , wherein a wave absorbing material is disposed outside the inlet of the material carrying pipeline, and the wave absorbing material is configured to allow, when a material enters the material carrying pipeline, the temperature to rise rapidly to meet the set temperature rise rate requirements. 8. The microwave processing equipment according to claim 7 , wherein an outer diameter of the inlet of the material carrying pipeline is the same as an outer diameter of a pipeline part of the material carrying pipeline not provided with the wave absorbing material. 9. The microwave processing equipment according to claim 4 , wherein a sealing material is installed at a microwave feed port, the sealing material is located between each waveguide and the microwave absorption cavity, and the sealing material has a carrying capacity and good microwave permeability, and belongs to low-loss or non-loss insulators. 10. The microwave processing equipment according to claim 9 , wherein the inclination direction of each waveguide with respect to the wall surface of the microwave absorption cavity is toward a middle part of the microwave absorption cavity. 11. The microwave processing equipment according to claim 10 , wherein the microwave generation system comprises a magnetron, a cooling device and a cast aluminum excitation cavity, one end of the magnetron is connected with the cast aluminum excitation cavity and the other end is connected with the cooling device, the cooling device comprises an air cooling and/or water cooling device, the air cooling device comprises an axial fan and a fan cover for heat dissipation of the magnetron, a dustproof plate for preventing foreign matters from entering the cast aluminum excitation cavity is disposed at a joint between the cast aluminum excitation cavity and the waveguide system, and the water cooling device comprises a water cooling container and a circulating water pipeline. 12. The microwave processing equipment according to claim 11 , wherein the feed preheating section comprises a feed tank, the material is conveyed between the feed tank and the microwave heating section through a screw pump, a flow meter is disposed in front of the microwave heating section and configured to accurately control a flow rate of flow liquid entering the microwave heating section, the feed tank is structured as a jacket being filled with hot water with a predetermined temperature for heating the flow liquid in the feed tank to a preheating temperature, and the flow liquid is uniformly stirred to make various parts thereof have the same initial temperature while improving heating speed and uniformity. 13. The microwave processing equipment according to claim 12 , further comprising: a constant temperature processing section connected between the microwave heating section and the cooling section, wherein the constant temperature processing section comprises a heat preservation tank, a heating device and a helix tube, the heat preservation tank is of a double-layer structure, the helix tube is installed in the heat preservation tank and configured to ensure a sufficient flow liquid constant temperature processing time while increasing a flow liquid heat exchange area, a drain valve is installed at the bottom of the heat preservation tank for liquid drainage and liquid replacement, and an air outlet hole is formed in a top cover of the heat preservation tank to balance internal and external air pressures. 14. The microwave processing equipment according to claim 13 , wherein the cooling section comprises a cooling tank, a refrigerating compressor and a helix tube, the helix tube is installed in the cooling tank and configured to ensure a sufficient liquid cooling time while increasing a flow liquid heat exchange area, a drain valve is installed at the bottom of the cooling tank, and an air outlet hole is formed in a top cover of the cooling tank to balance internal and external air pressures.
意見(jiàn)反饋
使用該功能遇到問(wèn)題
該功能需要專(zhuān)業(yè)版企業(yè)版VIP權(quán)限，您可以：
您也可以聯(lián)系官方QQ: 2157717237 電話(huà): 13264338900
PatentHub聯(lián)系方式
掃描加專(zhuān)利匯官方微信交流群
