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1 Good Dehumidifying EffectIveness, 2 PLC & Touch Screen Auto Control, 3 Engery Saving, 4 Quality Good - details see: https://www.machineto.com/tzh-y-g-f-12-dd-air-cooling-desiccant-rotor-coupling-dehumidifier-for-blasting-coating-10205610

1 Working Principle

TZH-F series industrial dehumidifier adopts air cooling freezing and honeycomb desiccant rotors coupling. It is applied for special coating in whole weather and it keeps proper temperature and low relative humidity. In summer, to use freezing mainly to use desiccant rotor supplement; in spring and autumn, it uses both to do dehumidifying; in winter, it uses desiccant rotor to do dehumidifying.

1.1 Dehumidifying working principle

The equipment adopts coupling dehumidifying methods of evaporator and desiccant rotar. The humid air will first go through air filters for filtering then it will be via evaporator of cooling system. The wet air will fully touch with the surface of evaporator. Because the surface temperature of evaporator is lower than dew point temperature of humid air, the vapor will get cooled and condense to water drops. The water drop will be collected in stainness steel panel and discharged. Thus the temperature and humidity become lower.

The air will continue to go through desiccant rotar and do further dehumidifying to some air. The main structure of desiccant rotar has honeycomb desiccant agent. Because of affinityfor between desiccant rotar and water, it will remove water from air futher again.

1.2 Auto control principle

To the character of this equipment, we adopt advanced PLC program control system to auto control temperature and humidity optimized automatically. The system will choose desiccant rotar to do dehumidifying; In humid season, when the max power of desiccant rotar can’t reach the requirements of humidity, the control system will improve the power for refrigerating output to improve the effectiveness of cooling dehumidifying; Or, when the humidity meets the requriements, the electrical control system will first relief the load of refrigerating and adjust the heating power of desiccant rotar slightly to control humidifty.

By adopting above method, it will reduce the refrigerating load of system utmostly and proper proportioning ratio of dehumidifying power. The evaporator will work in low load situation for long time. It will save engery consumption effectively and prolong the service life. Also it has characters of easy operation, low fault etc.

2 Introduce of equipment

The equipment is comprised of refrigerating system (compressor, condenser, evaporator, throttle parts), dehumidifying system ( high efficiency desiccant rotar, regeneration electrical heater, after electrical heater), ventilation system ( high pressure centrifugal air blower, regeneration air blower, filtering net) and intelligent electrical control system.

It has maintenance ladder, steel structure main frame, main air ventilation ducting, regeneration ducting adopts sealant, insulating structure. Under evaporator, there is a stainness steel panel for collecting water and water drain pipe; For condenser fan, there is a protective net. Forklift channel and lifting eye.

Main composition of equipment as follows:

1) Filtering: it adopts non-woven fabric G2 filtering net which is of good filtering effeciveness, small wind resistance, easy dust clean.

2) Refrigerating machine: it adopts air cooling refrigerating machine, compressor from Gemany BITZER screw compressor, 4 step energy adjusting, protection of phase fault, phase sequence, oil level and so on.

3) Desiccant rotar: it is made of special compound heat resisting material with desiccant agent in it. It has characters of compact structure, high efficency dehumidifying etc.

4) After electrical heater adopts stainless steel fin electrical resistance, controlled by PLC and multilevel control.

5) Regeneration electrical heater adopts stainless steel electrical heater, controlled by PLC and multilevel control.

6) Electrical control system: it adopts advanced PLC + Touch screen + Sensor. The client only needs to input the air outlet humidifty, the equipment will run according to settled requirements automatically. At the same time, the touch screen can show working situation, faults and temperature & humidifty of air oulet.

The electrical elements adopts Siemens/Schneider brand, sensor adopts imported elements, reliable. The design is easy for operation and maintenance.

3 Main technical parameters

Equipment Model	TZH-Y/G-F-12/DD
Electrical power	3ph, 380V/415V/50Hz
Main control procedure	100% refrigerating / 100% Desiccant rotar / Refrigerating + Desiccant rotar / 100% heating
Dehumidifying air volume	12000m3/h
Desiccant rotar air voluem	12000m3/h
Regeneration air volume	4000m3/h
Desiccant rotar	Imported from Japan NICHIAS desiccant rotar, honeycomb structure, desiccant agent silica gel, washable, service life≥15years
Extra pressure of exhaust air	≥1800 Pa
Refrigerating output	262kw
Compressor	Germany BITZER screw compressor
Condensor cooling type	Air cooling
Refrigerant	R22 (update available)
Heating type	Electrical heating
Temperature control type	High sensitive temperature sensor +PLC auto control +Touch Screen
Air inlet condition	Winter: Temperature≥-10°C, RH≤95% Spring & Autumn: Temperature15~20°C, RH≤95% Summer: Temperature≤40°C,RH≤95%
Air outlet condition	Winter: Temperature≥25±3°C, RH≤45% Spring & Autumn: Temperature≤25±3°C, RH≤45% Summer: Temperature≤25±3°C,RH≤45%
Evaporator	Copper tube + hydrophilic aluminum fins Size of copper tube Ø12.7×0.5mm
Condensor	Copper tube + hydrophilic aluminum fins Size of copper tube Ø9.52×0.5mm
Structure of equipment	Container structure as one whole
Size of air outlet	4×250mm round outlet with switch valve and connection joint
Electrical control cabinet	PLC control IP54 sealant + protection of electrical linkage, phase default, high and low voltage, overload + air pressure exceeding protection Protection for electric and pnuematic separately Self-diagnosis
Temperaure & humidity control and display	Refrigerating + Desiccant rotar regeneration heating temperaure + electrical heating
Fault display	Phase sequence protection / compressor fault / desiccant rotar fault / overload display / air pressure exceeding / no air flow in ducting alarming / overheating of electrical heater alarming etc.
Pressure display and protection	High, low pressure display + Protection
Air inlet filtering	Efficiency 93% / Washable double layer filtering / frame material aluminum alloy / filtering precision 0.5μm
Weight	4.9 tons
Max outsize	L×W×H: 4200mm×2100mm×2600mm
Premier paint & film thickness	2×100μm Paint: epoxy Color: Ocean blue
Finish paint & film thickness	2×75μm Paint: epoxy Color: Ocean blue