Closed Circuit Cooling Tower

The closed circuit cooling tower adopts the dual cooling mode of air-cooled and evaporative heat absorption, which has high cooling efficiency, saves water and reduces energy consumption. Fully closed circulating cooling system, no impurities enters the cooling pipeline system; using soft water circulating cooling, there is no scale formation at high temperatures.

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Protect Induction Heating System

Induction heating system will generate heat in the induction magnetic field, overheated temperature will damage the components. Therefore, water cooling should be used to take away this part of the heat to protect the equipment. Installing a proper cooling system will extend the life of the induction power supply, reduce maintenance costs and downtime. The cooling system is easy for operation and maintenance, and is widely used in induction heating systems, forging furnaces, hardening systems, and other heat treatment systems.

Working Principle

The circulating water only circulates inside the cooling tower and exchanges heat with the air for cooling, and then contacts the coil to take away the heat of the working fluid in the coil. The water supply pipe is properly filled with water. Compared with the open cooling tower, the closed cooling tower’s feature is to increase the coil, the liquid working fluid that needs to be cooled flows in the steel coil without direct contact with water, and exchanges heat through the tube wall.

Structure

The complete closed circuit cooling tower includes the tower shell, filling, exhaust system, spray system, circulation system, condenser, PLC electronic control system, etc.

Tower Shell
shell: domestic galvanized zinc / imported galvanized zinc / imported magnesium galvanized aluminum zinc / stainless steel (optional) Thickness: 2-3mm
High strength and toughness, corrosion resistance, suitable for long-distance transportation.
Using laser cutting technology, the workmanship is more precise and beautiful.

PVC Filler
The function of the filler is to cool down and exchange heat when it contacts the heated spray water, excellent PVC raw materials are particularly important for the heat exchange of cooling towers, and can also effectively reduce water drift and save water resources.

Exhaust System
Blade: aluminum alloy, hollow aluminum alloy, carbon fiber, polyethylene (optional)
The low-speed fully enclosed motor adopts ultra-wide fan blades. The fan is composed of aluminum blades and steel hubs. It has the advantages of low wind resistance, large air volume, low noise, high efficiency, and reliable performance. The protection grade is IP55, which is suitable for outdoor use.

Spray System
Spray pump (motor: Siemens, ABB, domestic brands, optional)
Special circulating water pump, protection grade IP55, no leakage, long life. Special outdoor motors and specially configured imported bearings are used to ensure long-term and reliable operation of the pump, with excellent performance such as low power, large flow, and low noise.

Condenser

Material: stainless steel/T2 copper tube
Pipe diameter: 16/19mm
Wall thickness: 0.55-1mm
Stainless steel tube: using seamless tube, durable and excellent under high pressure and high strength conditions. Compared with copper pipe, it is more corrosion resistant and less prone to scaling.
Copper tube: strong texture, corrosion resistance, high temperature resistance and high pressure resistance. Compared with stainless steel pipes, it has lighter weight, better thermal conductivity, and high recycling rate.

Applications:

Closed circuit cooling towers are mainly used in the air conditioning cooling, freezing, plastics chemical industry. 　
Mechanical operation cooling: generators, steam turbines, air compressors, oil compressors, engines, etc.;
Air temperature adjustment and cooling: air conditioning equipment, cold storage room, freezing, heating and cooling air conditioning, etc.;
Manufacturing and processing equipment cooling : food industry, pharmaceutical industry, metal casting, plastic industry, rubber industry, textile industry, steel plant, chemical industry, etc.;

Technical Specification:

Model	Cooling Capacity (K cal/h)	Flow Rate (m³/h)	Spray Pump		Fan			Pipe Size(mm)			Dimension	Weight
Model	Cooling Capacity (K cal/h)	Flow Rate (m³/h)	Power（kw）	Flow Rate (m³/h)	Power (kw)	Qty.	Diameter (mm)	Inlet/Outlet	Supply	Sewage	LWH（mm）	Net Weight (kg)	Operating Weight (kg)
BFN-10	50000	10	0.75	14.5	0.75	1	700	DN65	DN20	DN25	16009002300	560	980
BFN-15	75000	15	0.75	14.5	1.1	1	750	DN65	DN20	DN25	185010302300	630	1180
BFN-20	100000	20	1.1	29	0.75	2	700	DN65	DN20	DN25	225010302180	720	1380
BFN-30	150000	30	1.1	29	1.1	2	750	DN65	DN20	DN25	260012602360	800	1790
BFN -40	200 000	40	2.2	58	1.5	2	800	DN80	DN20	DN25	280012602800	980	2200
BFN -60	300 000	60	2.2	58	2.2	2	900	DN80	DN25	DN25	285015002800	1180	2650
BFN -80	400 000	80	2.2	58	3	2	1200	DN80	DN25	DN25	300017003050	1820	3680
BFN -100	500 000	100	4	96	3	2	1200	DN100	DN25	DN25	335022003100	2230	4860
BFN -125	625 000	125	4	96	4	2	1200	Dn125	DN32	DN32	335022003200	2650	5350
BFN -150	750 000	150	4	116	5.5	2	1500	DN150	DN32	DN32	385022003250	3350	7650
BFN -175	875 000	175	5.5	160	7.5	2	1500	DN150	DN32	DN32	420022003300	3820	8120
BFN -200	1 000 000	200	5.5	160	7.5	2	1800	DN125*2	DN32	DN32	480022003400	4280	9050
BFN 250	1 250 000	250	7.5	240	7.5	2	2200	DN200	DN40	DN40	545024003900	4870	9630
BFN -300	1 500 000	300	7.5	240	11	2	2200	DN150*2	DN40	DN40	545025004100	5110	1220

ROCHO technical team can customize the induction heating power supply for special purposes according to customer requirements, and design capacitors, frequencies and induction coils according to the metal workpiece to be heated and heating requirements to achieve the best heating effect.
When you need to consult or order machine, please provide the following information:
(1) the local industrial voltage;
(2) the name and material of the product to be processed;
(3) the required process: heating, brazing, hardening, melting or annealing;
(4) the size of the product to be processed, such as diameter and length and if drawings can be provided.

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