Continuous Microwave Tempering Tunnel
Exemplary Video: DanTech Continuous Tempering Tunnel - MIT36
Depending on the process, the product may be thawed, dried, cooked, or pasteurized. The product enters and exists through properly designed tunnels that ensure safe operation. Microwaves are brought to the chambers through antennas that ensure even distribution of the microwave field so as to achieve the highest uniformity of the heating
The system comprises the following elements/tunnel arrangement:
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A stainless steel structure designed so as to ensure the highest level of hygiene.
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Product entry and exit tunnels.
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Touch screen PanelView Plus 7 – 12” to control the entire system.
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Platform – a structure that enables effective use of the space, placed in front of the machine. The generator is placed on the platform so as to facilitate access to and operation of the machine.
5. A modular belt conveyor, 600 mm wide, ensuring continuous transport of the product across the entire machine. It is equipment with a system for monitoring the movement of the belt and to trace the product in the chamber, which ensures adjustment of the microwave power according to the extent to which the working chamber of the machine is filled. Also, the system monitors the integrity of the tape.
6. Generator – a power electronics system enclosed in an electrical cabinet, equipped with a magnetron (an element responsible for generating microwave energy), control system elements, waveguide elements, and microwave accessories. It is the “engine” of the entire machine.
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power 75 kW, continuous operation with the frequency of 915 MHz;
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a control box with all control devices and control circuits;
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analog information about the value of the glow current and the coil current in a visible location on the outside of the generator cabinet;
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a stainless steel enclosure;
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internal LED lighting in both the main cabinet and the control cabinet;
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a stainless steel cooling pump with an aluminum coolant distribution block;
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a 4 A 30 kV rectifier block with an improved air cooling system for the block;
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a complete interlock system monitored from the central control level;
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a double system of disconnectors/switches to ensure the highest safety level.
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a 106 kVA 12-impulse HV transformer with a complete bridge rectifier;
7. The set of antennas, with a correct operation monitoring system, ensures the best distribution of microwaves inside the chamber.
8. Control system – enables recording recipes with descriptions and process parameters.
9. Work chamber – this is where the microwave heating takes place. .
Also, the chamber is equipped with a door that enables easy access after the work is completed and easy cleaning of the machine. It is provided with coded active safety elements and a system for monitoring and control of bolting elements from the control system level.
10. Waveguide – a passive element of the machine responsible for transport of microwave energy from the generator to the work chamber of the machine. Thanks to the waveguide, the generator can be located in a separate location from the machine so as to enable better use of the available space.
Safety of the system:
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With regard to microwaves – the key safety element of the machine is two microwave leak sensors that are calibrated so that the machine is stopped when even the smallest microwave leak is detected.
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With regard to electric shock – the system is equipped with dual disconnector and switch systems and with numerous interlock systems that prevent operation of the machine in dangerous conditions, e.g. when the generator cabinet door is opened.
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With regard to protection of the magnetron and to economic aspects – the system is designed to prevent switching the generator on when there is no product in the chamber.
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WIth regard to EMI
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WIth regard to Fire - Dantech fire suppression