Induction heating furnace two sets of intermediate frequency power supply cooling water system and furnace cooling water system are separate and independent full seal

Each set of intermediate frequency power supply fully enclosed "deionized water" cooling system is mainly composed of cooling tower, water pump station and control cabinet. Each set includes: a cooling tower, the shell is made of galvanized steel, the heat exchange serpentine tube is made of copper tube, and a separate water pump sprays the water that cools the lower tank through the spray pipe above the serpentine tube on the serpentine tube. Cool down. The wind generated by the fan blows through the surface of the serpentine tube to enhance the cooling effect.

The pump station mainly includes:

1. Two stainless steel centrifugal pumps, and a sealed motor connected thereto, one of the two pumps is a backup pump.

2. Expansion tank for balancing the expansion and contraction of cooling water in the system.

3. A quick-filling pressure reducing valve and a removable filter screen keep the pressure of the system during water injection within the limit.

4. One relief valve releases excess pressure by means of overflow discharge.

5. Valves, instruments, hoses, pipes and wires required for cooling the system. All valves, pipes and fittings are made of stainless steel or copper.

6. An automatic/manual exhauster exhausts air from the cooling water system.

7. A vacuum valve that stabilizes the pressure of the system.

(2), softened water cooling system of the furnace body

    Each set includes: a cooling tower, the shell is made of galvanized steel, the heat exchange serpentine tube is made of steel pipe, and a separate water pump sprays the water in the lower tank of the cooling tower through the spray pipe above the serpentine pipe on the serpentine pipe. Cool down. The wind generated by the fan blows through the surface of the serpentine tube to enhance the cooling effect.

The pump station mainly includes:

(a) Two cast iron centrifugal pumps, and a sealed motor connected to them, one of the two pumps is a backup pump. There is also an emergency cooling pump that is powered by the plant's emergency power source for cooling the furnace in an emergency.

(b) An expansion tank for balancing the expansion and contraction of the cooling water in the system.

(c), a quick-filling pressure reducing valve and a removable filter to keep the pressure of the system water-filled within the limits.

(d) One relief valve that releases excess pressure by means of overflow discharge.

(e) Valves, instruments, hoses, pipes and wires required inside the cooling system. All valves, pipes and fittings are ordinary steel pipes.

(f) One automatic/manual exhaust exhausts the air from the cooling water system.

(g), a vacuum valve to stabilize the pressure of the system.

(h), 1 electric furnace inlet main pipe, equipped with a pressure gauge to indicate the main pipe pressure.

(i) One electric furnace water discharge main pipe, on which a flow switch is installed. When the flow rate is lower than the set value, the flow switch automatically cuts off the intermediate frequency power supply. There is a thermocouple and a temperature switch on the drain pipe of each induction coil. When any of the coils of the coil exceeds the limit temperature, the intermediate frequency power supply is automatically cut off by the temperature switch, and the drain temperature is displayed by the meter.

(j) A set of hoses for the connection between the furnace and the manifold.

(k) Three temperature switches for:

- When the water temperature entering the electric furnace system reaches the set value, the cooling tower fan starts.

- Start the spray pump at the set point.

- When the water temperature entering the electric furnace system exceeds the limit value, the audible alarm and the rotary warning light are turned on.

Control cabinet

    Each IF melting system has a control cabinet that is used to control the water cooling system and hydraulic system. There should be a display on the electric furnace operating platform to display the operation of the water cooling system motor and alarm and silence; reserve four standby start and stop buttons on the display (the contacts are open and closed). The main components of each control cabinet are as follows:

(a) Four sets of motor starters for the intermediate frequency power supply cooling system. One for the cooling tower fan, two for the circulation system and one for the cooling tower spray pump.

(b) Four sets of motor starters for the electric furnace partial cooling system. One for the cooling tower fan, two for the circulation system and one for the cooling tower spray pump.

(c) A control voltage transformer.

(d) A set of fuses.

(e) "Manual-stop-automatic" switch for two cooling tower spray pump motors.

(f) "Manual-stop-automatic" switch for two cooling tower fan motors.

(g), "1# pump on-stop-2# pump on" switch of a power cooling system circulating water motor.

(h) The "1# pump on-off-2# pump on" switch of the circulating water motor of an electric furnace cooling system.

(i) An over-temperature alarm and two over-temperature alarms.

(j) Two sets of motor starters for hydraulic systems for hydraulic pumps.

(k), "1# pump on -2# pump on" switch of a hydraulic system hydraulic pump motor.

8. Water quality requirements:

Closed-circuit VIP cooling water system: Closed-circulating cooling water system, under normal circumstances, no need to replenish water. The initial water replenishment quantity is determined according to the installation condition of the on-site pipeline. The water quality requirement is to add anti-freezing liquid in an appropriate proportion according to the local temperature condition, and the electrical conductivity is less than 10 micromho / cm of deionized water or distilled water.

   Closed-circuit furnace cooling water system: Closed-circulating cooling water system, under normal circumstances, no need to replenish water. The initial water supply is determined according to the installation conditions of the on-site pipeline. The water quality requirements are based on the local temperature conditions, and the antifreeze is added in an appropriate proportion.

Specific requirements are as follows:

      A) Conductivity is less than 800 μm / cm

      B) Hardness less than 100PPM

      C) suspended matter less than 10PPM

       D) Deionized water or distilled water or other water that meets the above conditions may be used.

l Cooling tower system:

The power supply cooling tower has a water supply capacity of 1300KG/hour. (Consider deionized water system)

The cooling capacity of the furnace cooling tower is 5800KG/hour (considering deionized water system)

Cooling tower replenishment water requirements are as follows:

      A) Hardness less than 50-300 PPM (calcium hardness CaCo3 50-300ppm Chloride ion content CL less than 125ppm

      B) PH value: 7.0-8.0

      C) suspended matter less than 10 PPM