CN211601179U - Cooling device for four-roller motor in steel rolling mill - Google Patents
Cooling device for four-roller motor in steel rolling mill Download PDFInfo
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- CN211601179U CN211601179U CN201922381180.3U CN201922381180U CN211601179U CN 211601179 U CN211601179 U CN 211601179U CN 201922381180 U CN201922381180 U CN 201922381180U CN 211601179 U CN211601179 U CN 211601179U
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Abstract
The utility model relates to a cooling device for four roller motors in steel rolling mill, including cooling water set, a plurality of sets of surface cooler and water system pipeline, the cooling water set is water-cooling screw cooling water set, including full liquid evaporimeter, semi-closed screw compressor, external oil separator, water cooled condenser, filter, electronic expansion valve and electrical control system, the water system pipeline includes chilled water outlet pipe way, chilled water return water pipeline, cooling water outlet pipe way, cooling water return water pipeline and high-order moisturizing case. The device can achieve the purposes of automatically controlling the return air temperature of the air conditioner and saving energy, can realize air supply without condensation and can refrigerate all the year round.
Description
Technical Field
This patent application belongs to cooling arrangement technical field, and more specifically says so, relates to a cooling device for four roller motor in steel mill.
Background
The four-roller main motor (power 2300KW multiplied by 4) of a steel rolling mill has larger heat productivity (about 300KW multiplied by 4) during operation, and the heat productivity needs to be taken away in time through a cooling system in order to ensure the normal operation of the main motor. The heat exchanger of the original cooling system is used for more than forty years, and the equipment aging and maintenance cost is high; the originally designed cold source water is underground water, and the water temperature is about 25 ℃ in summer; however, the actual cold source water is surface water, the temperature in summer is about 35 ℃, the cooling effect is very poor, the temperature of the cold source water cannot be controlled, and the temperature of the main motor cannot be effectively reduced, so that the temperature of the excitation coil of the main motor in summer is about 110 ℃ plus 120 ℃, and the safe operation of the main motor is seriously threatened. Therefore, the existing cooling system needs to be modified and upgraded to be an air conditioning system so as to meet the actual production requirements.
After many times of research and exchange with the factory technology, the original cooler is changed into an air conditioning system according to the current situation of a steel mill. The new air conditioning system requires a host machine (a water chilling unit) with a cold source to provide cold source water with controllable temperature. The new air conditioning system requires the form of adopting a water-cooling screw water chilling unit, a water system (cooling water, chilled water) and 4 sets of surface air coolers, wherein the surface air coolers are arranged at the position of the original air conditioning heat exchanger and use the original air conditioning fan; the new air-conditioning system is required to be provided with a water flow regulating valve and a control system, can set and timely display the return air temperature of each air conditioner, and automatically regulates the cold water flow passing through the surface cooler according to the set return air temperature, thereby achieving the purposes of automatically controlling the return air temperature of the air conditioner and saving energy. The new air conditioning system requires no condensation to supply air and can refrigerate all the year round.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that needs to solve provides a cooling device for four roller motors in steel rolling mill to satisfy above-mentioned requirement.
In order to solve the above problem, the utility model discloses the technical scheme who adopts is:
a cooling device for a four-roller motor in a steel rolling mill comprises a water chilling unit, a plurality of sets of surface coolers and water system pipelines, wherein the water chilling unit is a water-cooled screw type water chilling unit which comprises a full-liquid evaporator, a semi-closed screw compressor, an external oil separator, a water-cooled condenser, a filter, an electronic expansion valve and an electrical control system, wherein the full-liquid evaporator, the semi-closed screw compressor, the external oil separator, the water-cooled condenser, the filter and the electronic expansion valve are sequentially connected, and the electronic expansion valve and the full-liquid evaporator are also connected to form a closed loop; the electric control system is correspondingly connected with the full liquid evaporator, the semi-closed screw compressor, the external oil separator, the water-cooled condenser, the filter and the electronic expansion valve;
the water system pipeline comprises a chilled water outlet pipeline, a chilled water return pipeline, a cooling water outlet pipeline and a cooling water return pipeline, wherein a chilled water outlet of the flooded evaporator is connected with a water inlet pipeline of each set of surface air cooler through the chilled water outlet pipeline, and a chilled water return port of the flooded evaporator is connected with a water outlet pipeline of each set of surface air cooler through the chilled water return pipeline;
a cooling water outlet of the water-cooled condenser is connected with a cooling water outlet treatment device through a cooling water outlet pipeline, and a cooling water return port of the water-cooled condenser is connected with a plant water source through a cooling water return pipeline;
the chilled water outlet pipeline and the cooling water outlet pipeline are respectively provided with a water flow switch, and the chilled water outlet pipeline, the chilled water return pipeline, the cooling water outlet pipeline and the cooling water return pipeline are respectively provided with a thermometer.
The utility model discloses technical scheme's further improvement lies in: the cooling water return pipeline is sequentially provided with a butterfly valve, a filter, an electronic water treatment device, a thermometer, a pressure gauge and a vibration-avoiding throat from a factory water source (along the reverse direction of water flow), and the electronic water treatment device is also connected with the butterfly valve in parallel;
the cooling water outlet pipeline is connected with a cooling water outlet treatment device after being sequentially provided with a vibration-avoiding throat, a pressure gauge, a thermometer, a butterfly valve and a water flow switch from a cooling water outlet of the water-cooled condenser (along the water flow direction, the vibration-avoiding throat, the pressure gauge, the thermometer, the butterfly valve and the water flow switch are also connected with a cleaning valve through a branch pipe;
the system comprises a chilled water outlet pipeline, a plurality of sets of surface coolers, a plurality of filters, a pressure gauge and a thermometer, wherein the chilled water outlet pipeline is connected with a chilled water outlet of a full liquid evaporator, the chilled water outlet pipeline is sequentially provided with a vibration-avoiding throat, the pressure gauge, the thermometer, a butterfly valve and a water flow switch and then is connected with a water inlet pipeline of each set of surface cooler;
the freezing water return pipeline is sequentially provided with two sets of freezing water pumps, a thermometer, a pressure gauge and a vibration-avoiding throat along the water flowing direction, the freezing water pumps are connected in parallel and are connected with a water return pipeline of each set of surface cooler, the water return pipeline of each set of surface cooler comprises the thermometer, the pressure gauge and a plurality of butterfly valves which are sequentially connected with a water return port of the surface cooler, the last butterfly valve on the water return pipeline of the surface cooler is connected with the freezing water pump, and the water inlet pipeline and the water return pipeline of the same set of surface cooler are also connected through the butterfly valves;
the electric control system is connected with all the vibration-avoiding throats, the pressure gauge, the thermometer, the butterfly valve, the water flow switch, the filter and the freezing water pump.
The utility model discloses technical scheme's further improvement lies in: the water-cooled screw type water chilling unit selects an LSBLG1100DFS flooded water chilling unit, and the adopted refrigerant is R134a (tetrafluoroethane).
The utility model discloses technical scheme's further improvement lies in: the water-cooled condenser adopts a shell-and-tube water-cooled condenser, a heat transfer pipe of the water-cooled condenser is a high-efficiency heat exchange pipe (wherein refrigerant is led away from the shell pass; the evaporator adopts a flooded evaporator, the heat transfer pipe is a high-efficiency heat exchange pipe with external threads, chilled water is led away on the pipe side, and refrigerant is led away on the shell side.
The utility model discloses technical scheme's further improvement lies in: the water system pipeline also comprises a high-level water replenishing tank connected with the purified water, a water outlet pipe of the high-level water replenishing tank is connected with a chilled water pump on a chilled water return pipeline, and the capacity of the high-level water replenishing tank is 1m3。
The utility model discloses technical scheme's further improvement lies in: the surface air coolers are four sets.
Since the technical scheme is used, the utility model discloses the beneficial effect who gains is:
1) no condensation and air supply: the design of large air quantity and small enthalpy difference, the treatment of large apparent heat ratio, the rapid elimination of equipment heat productivity and the guarantee of no condensation phenomenon of air supply.
2) The existing four-roller main motor cooling system is comprehensive and reliable in temperature regulation means: both the accessible is adjusted the play water temperature of cooling water set, also can adjust through the cold discharge of adjusting through the air conditioner surface cooler, and full automation temperature regulation.
3) A high-temperature flooded water chilling unit (indicating that the temperature of water can reach more than 10 ℃) is adopted as a main machine, so that the refrigeration efficiency is improved, and the air supply without condensation is ensured.
4) The high-temperature environment-friendly working medium R134a (tetrafluoroethane) is adopted, so that the environment-friendly requirement of the country is met, and the condition that surface water with higher temperature is used as cooling water of a water chilling unit in summer can be resisted.
The utility model discloses a new air conditioning system is equipped with discharge regulatory function and control system, can set for and show the return air temperature of each air conditioner in good time to according to the cold discharge of the return air temperature automatically regulated through the surface cooler of setting for, thereby reach automatic control air conditioner return air temperature and energy-conserving purpose. The new air conditioning system realizes condensation-free air supply and can refrigerate all the year round. The cooling technology adopted in the metallurgical industry at present to cool the main motor of the rolling mill is the first factory in the industry, and the cooling technology is safe and reliable after running for more than one year, has obvious cooling and energy-saving effects, can be applied and popularized and has huge popularization prospects.
Drawings
FIG. 1 is a schematic view of the structural connection of the present invention;
wherein: 1. the system comprises a butterfly valve, 2, a check valve, 3, a pressure gauge, 4, a vibration-avoiding throat, 5, a frozen water pump, 6, a thermometer, 7, an electronic water processor, 8, a filter, 11, a water chilling unit, 12, a water flow switch, 13, a cleaning valve, 14, a water-cooled condenser, 15, a full-liquid evaporator, 16, a surface air cooler, 17, a frozen water outlet pipeline, 18, a frozen water return pipeline, 19, a cooling water outlet pipeline, 20, a cooling water return pipeline, 21, a cooling water outlet water processing device, 22, a plant water source, 23 and a high-level water replenishing tank.
Detailed Description
The present invention will be described in further detail with reference to examples.
The utility model discloses a cooling device for four-roller motor in steel rolling mill, including cooling water set 11, a plurality of sets of surface cooler 16 and water system pipeline, cooling water set 11 is water-cooling screw type cooling water set, water-cooling screw type cooling water set includes full liquid evaporator 15, semi-closed screw compressor, external oil separator, water-cooling condenser 14, filter, electronic expansion valve and electrical control system, wherein full liquid evaporator 15, semi-closed screw compressor, external oil separator, water-cooling condenser 14, filter, electronic expansion valve connect gradually, electronic expansion valve also connects thereby to form the closed loop with full liquid evaporator; the electric control system is correspondingly connected with the full liquid evaporator 15, the semi-closed screw compressor, the external oil separator, the water-cooled condenser 14, the filter and the electronic expansion valve;
a compressor: an international well-known brand semi-closed screw compressor is adopted. The compressor uses a high efficiency of 5: the 6 patent asymmetric tooth type has the obvious advantages of stable operation, high efficiency, small vibration, low noise and the like, and is one of the most advanced compressors in the world at present. The machine has stepless, three-section and four-section adjustable unloading modes, and the machine set can automatically load and unload according to load change so as to achieve the aim of saving energy.
External secondary oil separator: and a high-efficiency oil separator is adopted to separate 80-90% of the lubricating oil in the exhaust gas of the compressor again and return the lubricating oil to the compressor. On one hand, the system circulation volume of the refrigeration oil is reduced, and the reliability of the compressor is improved; on the other hand, the heat transfer resistance is effectively reduced, and the refrigeration efficiency is improved.
Water-cooled condenser 14: a shell-and-tube water-cooled condenser is adopted, and a heat transfer pipe is a high-efficiency heat exchange pipe. Wherein the shell side removes the refrigerant; cooling water is fed on the tube side.
A filter: a welded angle type filter is adopted, and a filter element is a molecular sieve. The water in the refrigerant is quickly absorbed, impurities are filtered, the replacement is convenient, and the filter element can be regenerated and reused.
Electronic expansion valve: the electronic expansion valve of the international famous brand is adopted, and the function of the electronic expansion valve is to automatically adjust the flow and the liquid level of the refrigerant in the evaporator according to the exhaust temperature of the compressor, so that the heat exchange efficiency of the refrigerating machine in the flooded evaporator and the oil return efficiency of the whole system are ensured.
Flooded evaporator 15: a flooded evaporator is adopted, and a heat transfer pipe is a high-efficiency heat exchange pipe with external threads. Wherein, the tube side is used for transporting the chilled water, and the shell side is used for transporting the refrigerant.
The water system pipeline comprises a chilled water outlet pipeline 17 (for example, the temperature is set to 12 ℃), a chilled water return pipeline 18 (for example, the temperature is set to 7 ℃), a cooling water outlet pipeline 19 (for example, the temperature is set to 35 ℃), a cooling water return pipeline 20 (for example, the temperature is set to 30 ℃), a chilled water outlet of the flooded evaporator 15 is connected with a water inlet pipeline of each set of surface cooler 16 through the chilled water outlet pipeline 17, and a chilled water return port of the flooded evaporator 15 is connected with a water outlet pipeline of each set of surface cooler through the chilled water return pipeline 18;
a cooling water outlet of the water-cooled condenser 14 is connected with a cooling water outlet treatment device 21 through a cooling water outlet pipeline 19, and a cooling water return port of the water-cooled condenser 14 is connected with a plant water source 22 (with the pressure of 3 kilograms) through a cooling water return pipeline 20;
the chilled water outlet pipeline 17 and the cooling water outlet pipeline 18 are both provided with a water flow switch 12, and the chilled water outlet pipeline 17, the chilled water return pipeline 18, the cooling water outlet pipeline 19 and the cooling water return pipeline 20 are all provided with thermometers 6.
The cooling water return pipeline 20 is sequentially provided with a butterfly valve 1, a filter 8, an electronic water treatment device 7, a thermometer 6 (with a temperature sensor function, wherein the corresponding temperature sensor is positioned at a DN200 pressure mark), a pressure gauge 3 (the specification of DN 200), and a vibration-avoiding throat 4 from a plant water source 22 (along the water flow direction is reverse), and the electronic water treatment device 7 is also connected with the butterfly valve 1 in parallel;
the cooling water outlet pipeline 19 is sequentially provided with a vibration-avoiding throat 4, a pressure gauge 3, a thermometer 6, a butterfly valve 1 and a water flow switch 12 from a cooling water outlet of the water-cooled condenser 14 (along the water flow direction in the reverse direction), and then is connected with a cooling water outlet treatment device 21, and the water flow switch 12 is also connected with a cleaning valve 13 through a branch pipe;
the chilled water outlet pipeline 17 is sequentially provided with a vibration-avoiding throat 4, a pressure gauge 3, a thermometer 6, a butterfly valve 1 and a water flow switch 12 from a chilled water outlet of the flooded evaporator 15, and then is connected with a water inlet pipeline of each set of surface cooler 16, the water inlet pipeline of each set of surface cooler 16 is sequentially provided with a plurality of butterfly valves 1, filters 8, pressure gauges 3 and thermometers 6, the butterfly valves 1 are connected with the water flow switches 12 on the chilled water outlet pipeline 17, and the thermometers 6 are connected with a water inlet of the surface coolers 16;
the chilled water return pipeline 18 is sequentially provided with a chilled water pump 5, a thermometer 6, a pressure gauge 3 and a vibration-avoiding throat 4 along the water flowing direction, the chilled water pumps 5 are arranged in parallel and are connected with a return pipeline of each set of surface cooler 16, the return pipeline of each set of surface cooler 16 comprises the thermometer 6, the pressure gauge 3 and a plurality of butterfly valves 1 which are sequentially connected with return ports of the corresponding surface coolers 16, the last butterfly valve 1 on the return pipeline of the surface cooler 16 is connected with the chilled water pump 5, and the water inlet pipeline and the return pipeline of the same set of surface cooler 16 are also connected through the butterfly valves 1;
the electric control system is connected with all the vibration-avoiding throats 4, the pressure gauge 3, the thermometer 6, the butterfly valve 1, the water flow switch 12, the filter 8 and the frozen water pump 5. The main parts of the electrical control system all adopt international famous brands to ensure the reliability of the unit. The unit is controlled by a PLC, so that the operation is simpler and more convenient.
Specifically, in the configuration of the water chiller 11, the LSBLG1100DFS flooded chiller is selected as the water-cooled screw chiller, and R134a (tetrafluoroethane) is used as the refrigerant. The compressor adopts a semi-closed double-screw compressor of an international famous brand, and has the remarkable advantages of stable operation, high efficiency, small vibration, low noise and the like; key parts and electrical control elements of the system are made of international famous brands, and the performance is reliable; the heat exchanger is made of high-efficiency heat exchange tubes and advanced processing means, and the heat exchange efficiency is high; the machine set is controlled by a PLC (programmable logic controller). The unit has the characteristics of high reliability, high efficiency, high automation, simple and convenient operation and the like. The full-liquid evaporator is selected as the evaporator, the heat exchange efficiency is high, and the energy efficiency ratio is up to 6.44.
The unit can provide chilled water with the temperature of 5-20 ℃, can be widely applied to comfortable air-conditioning places such as markets, hotels, movie theaters, hospitals, large-scale plants, high-rise buildings and the like, and can also provide cold sources for process cooling.
2. Main Properties (for reference)
The unit model is as follows: LSBLG1100DFS
The refrigerating capacity of the use working condition is as follows: 1260 KW
Input power: 195.9KW
The starting mode is as follows: star-triangle starting and platform-by-platform
The adjustable mode is as follows: stepless energy regulation
The applicable power supply: 3N-380V-50Hz
Refrigerant/charge: r134a/440 kg
Secondary refrigerant: water (W)
A water-cooled condenser: the water inlet and outlet pipe ports are all 2-DN200 water inlet and outlet in the lower water inlet and upper water outlet directions
The connection mode is that the flange is connected with water flow of 195.9 m3/h
Full liquid evaporator: the water inlet and outlet pipe ports are all 2-DN200 water inlet and outlet in the upper inlet and lower outlet directions
The connection mode is that the flange connection water flow is 250.4 m3/h
The external dimension is as follows: 4750mm × 1580mm × 2200mm (length × width × height)
The net amount of the unit: 6770kg
Note: 1. nominal working conditions: the inlet temperature of the chilled water is 16 ℃, and the outlet temperature of the chilled water is 11 DEG C
The water inlet temperature of the cooling water is 30 ℃, and the water outlet temperature is 35 DEG C
2. The refrigerating capacity, the chilled water and the cooling water flow are all parameters under the working condition of use
The water-cooled condenser 14 is a shell-and-tube water-cooled condenser, and a heat transfer pipe of the water-cooled condenser 14 is a high-efficiency heat exchange pipe, wherein a refrigerant is fed on a shell side, and cooling water is fed on a tube side; the filter 8 adopts a welding angle type filter, and a filter element is a molecular sieve; the flooded evaporator 15 is a flooded evaporator, and the heat transfer tube is a high-efficiency heat exchange tube with external threads, wherein chilled water is fed on the tube side, and refrigerant is fed on the shell side.
The water system pipeline also comprises a high-level water-supplementing tank 23 connected with purified water, a water outlet pipe (DN 40 standard) of the high-level water-supplementing tank 23 is connected with a chilled water pump 5 on the chilled water return pipeline 18, and the capacity of the high-level water-supplementing tank 23 is 1m3。
The surface air coolers 16 are four sets, and of course, the number of the surface air coolers can be selected according to actual conditions, and is not limited in quantity. The surface cooler is arranged at the position of the original air-conditioning heat exchanger, and an original air-conditioning fan is used. This patent can set for and show the return air temperature of each air conditioner in good time to according to the cold water flow of the return air temperature automatically regulated who sets for through the surface cooler, thereby reach automatic control air conditioner return air temperature and energy-conserving purpose. The new air conditioning system requires no condensation to supply air and can refrigerate all the year round.
The usage amount of the butterfly valve 1 and the like is more, and the butterfly valve is added according to the condition of a water system pipeline. Of course, valves such as electric three-way regulating valves can also be used, and the description is omitted here.
The working principle is as follows: the low-temperature low-pressure superheated steam from the flooded evaporator 15 is sucked by the compressor, compressed into high-temperature and high-pressure gas by the compressor, discharged into the water-cooled condenser 14 through the external oil separator, taken away heat by cooling water flowing through the water-cooled condenser 14, condensed into subcooled liquid, passed through the filter, enters the electronic expansion valve, throttled and decompressed into vapor-liquid two phases, and enters the evaporator, the refrigerant is continuously evaporated in the evaporator, so that the temperature of the chilled water flowing through the flooded evaporator 15 is reduced, and the refrigerant in the flooded evaporator 15 absorbs heat to become superheated steam which is absorbed by the compressor. By circulating in this way, the temperature of the freezing water is continuously reduced to the required temperature. See figure 1 for details.
It is known that the cooling technology adopted by the domestic metallurgical industry to cool the main motor of the rolling mill is the first one in the industry at present. After the operation for more than months in nearly 1 year, the device is safe and reliable, has obvious cooling and energy-saving effects, and can be applied and popularized.
Claims (6)
1. The utility model provides a four roller motor of steel mill are with cooling device which characterized in that: the water cooling screw type water chilling unit comprises a full liquid evaporator, a semi-closed screw compressor, an external oil separator, a water cooling condenser, a filter, an electronic expansion valve and an electrical control system, wherein the full liquid evaporator, the semi-closed screw compressor, the external oil separator, the water cooling condenser, the filter and the electronic expansion valve are sequentially connected, and the electronic expansion valve is also connected with the full liquid evaporator so as to form a closed loop; the electric control system is correspondingly connected with the full liquid evaporator, the semi-closed screw compressor, the external oil separator, the water-cooled condenser, the filter and the electronic expansion valve;
the water system pipeline comprises a chilled water outlet pipeline, a chilled water return pipeline, a cooling water outlet pipeline and a cooling water return pipeline, wherein a chilled water outlet of the flooded evaporator is connected with a water inlet pipeline of each set of surface air cooler through the chilled water outlet pipeline, and a chilled water return port of the flooded evaporator is connected with a water outlet pipeline of each set of surface air cooler through the chilled water return pipeline;
a cooling water outlet of the water-cooled condenser is connected with a cooling water outlet treatment device through a cooling water outlet pipeline, and a cooling water return port of the water-cooled condenser is connected with a plant water source through a cooling water return pipeline;
the chilled water outlet pipeline and the cooling water outlet pipeline are respectively provided with a water flow switch, and the chilled water outlet pipeline, the chilled water return pipeline, the cooling water outlet pipeline and the cooling water return pipeline are respectively provided with a thermometer.
2. The cooling device for the four-roller motor in the steel mill according to claim 1, wherein: the cooling water return pipeline is sequentially provided with a butterfly valve, a filter, an electronic water treatment device, a thermometer, a pressure gauge and a vibration-avoiding throat from a factory water source, and the electronic water treatment device is also connected with the butterfly valve in parallel;
the cooling water outlet pipeline is connected with a cooling water outlet treatment device after being sequentially provided with a vibration-avoiding throat, a pressure gauge, a thermometer, a butterfly valve and a water flow switch from a cooling water outlet of the water-cooled condenser, and the water flow switch is also connected with a cleaning valve through a branch pipe;
the system comprises a chilled water outlet pipeline, a plurality of sets of surface coolers, a plurality of filters, a pressure gauge and a thermometer, wherein the chilled water outlet pipeline is connected with a chilled water outlet of a full liquid evaporator, the chilled water outlet pipeline is sequentially provided with a vibration-avoiding throat, the pressure gauge, the thermometer, a butterfly valve and a water flow switch and then is connected with a water inlet pipeline of each set of surface cooler;
the freezing water return pipeline is sequentially provided with two sets of freezing water pumps, a thermometer, a pressure gauge and a vibration-avoiding throat along the water flowing direction, the freezing water pumps are connected in parallel and are connected with a water return pipeline of each set of surface cooler, the water return pipeline of each set of surface cooler comprises the thermometer, the pressure gauge and a plurality of butterfly valves which are sequentially connected with a water return port of the surface cooler, the last butterfly valve on the water return pipeline of the surface cooler is connected with the freezing water pump, and the water inlet pipeline and the water return pipeline of the same set of surface cooler are also connected through the butterfly valves;
the electric control system is connected with all the vibration-avoiding throats, the pressure gauge, the thermometer, the butterfly valve, the water flow switch, the filter and the freezing water pump.
3. The cooling device for the four-roller motor in the steel mill according to claim 2, wherein: the water-cooling screw type water chilling unit selects an LSBLG1100DFS flooded water chilling unit, and the adopted refrigerant is R134 a.
4. A cooling device for a four-roll motor in a steel mill according to claim 3, characterized in that: the water-cooled condenser adopts a shell-and-tube water-cooled condenser, the filter adopts a welded angle filter, and a filter element is a molecular sieve; the evaporator adopts a flooded evaporator.
5. The cooling device for the four-roller motor in the steel mill according to claim 4, wherein: the water system pipeline also comprises a high-level water replenishing tank connected with the purified water, a water outlet pipe of the high-level water replenishing tank is connected with a chilled water pump on a chilled water return pipeline, and the capacity of the high-level water replenishing tank is 1m3。
6. The cooling device for the four-roller motor in the steel mill according to claim 5, wherein: the surface air coolers are four sets.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922381180.3U CN211601179U (en) | 2019-12-26 | 2019-12-26 | Cooling device for four-roller motor in steel rolling mill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922381180.3U CN211601179U (en) | 2019-12-26 | 2019-12-26 | Cooling device for four-roller motor in steel rolling mill |
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