CN211885408U - Heat pump unit with oil cooling device, heat pump system and evaporation concentration system - Google Patents
Heat pump unit with oil cooling device, heat pump system and evaporation concentration system Download PDFInfo
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- CN211885408U CN211885408U CN202020082997.0U CN202020082997U CN211885408U CN 211885408 U CN211885408 U CN 211885408U CN 202020082997 U CN202020082997 U CN 202020082997U CN 211885408 U CN211885408 U CN 211885408U
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Abstract
The utility model discloses a heat pump set with oil cooling device, including evaporimeter, condenser, compressor, main throttle valve, economizer and oil cooling device, the refrigerant air inlet of condenser is connected with the compressor, the refrigerant liquid outlet of condenser is connected with the economizer, the liquid outlet of economizer is connected with main throttle valve through the trunk line; the gas-liquid port of the main throttle valve is connected with the evaporator, and the gas outlet of the evaporator is connected with the compressor; a first bypass pipe is arranged on the main pipe, a first throttling valve is arranged on the first bypass pipe, and the first bypass pipe is connected with a gas-liquid port of the economizer; an oil inlet, an oil outlet and a hot gas outlet of the oil cooling device are respectively connected with an oil outlet, an oil inlet and an air inlet of the compressor, and a cold air inlet of the oil cooling device is connected with an air outlet of the economizer. The utility model also discloses a heat pump system and an evaporative concentration system. By adopting the structure, the system has the advantages of ingenious structural design and high efficiency and energy conservation.
Description
Technical Field
The utility model belongs to the technical field of the evaporative concentration system, specific theory is about a heat pump set, heat pump system and evaporative concentration system with oil cooling device.
Background
A compressor is arranged in a conventional heat pump unit, refrigerant gas in a low-pressure state is compressed into gas in a high-pressure state through the compressor, and a refrigeration cycle is formed between the refrigerant gas and a condenser and an evaporator in the heat pump unit. During the operation of the compressor, the temperature of the refrigerant oil is continuously increased, so the system is usually provided with cooling water for cooling. At present, the oil cooling process of a compressor generally adopts cooling water to cool, the cooling water is generally connected with a cooling tower, heat is taken away by the cooling water and discharged into air in the cooling process, and the heat energy utilization rate is low.
In addition, the conventional heat pump unit needs to provide a stable heat source for the unit, such as rivers, lakes and seas, underground wells, waste hot water and the like, the requirement on the use place is high, and when the heat pump unit is connected, a water pump pipeline system is complex, and a complex pump set and a pipeline valve system need to be arranged. Furthermore, the use of rivers, lakes, seas, underground wells, waste hot water, etc., for a long time, may cause damage to the local geology. There is therefore a need for improvement.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a first purpose provides a heat pump set with oil cooling device to solve the problem that current heat pump set's heat utilization rate is low. The second objective of the present invention is to provide a heat pump system, so as to solve the problems that the existing heat pump unit needs additional heat source and the environment is greatly damaged. It is a third object of the present invention to provide an evaporative concentration system.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
as a first aspect of the utility model, a heat pump unit with an oil cooling device is used for an evaporation concentration system, which comprises an evaporator, a condenser, a compressor, a main throttle valve, an economizer and an oil cooling device,
the refrigerant gas inlet of the condenser is connected with the gas outlet of the compressor and is used for exchanging heat and condensing high-temperature and high-pressure refrigerant gas into liquid in a high-pressure state;
a refrigerant liquid outlet of the condenser is connected with a liquid inlet of the economizer, and a liquid outlet of the economizer is connected with a liquid inlet of the main throttle valve through a main pipeline and is used for throttling liquid condensed into a high-pressure state into a low-pressure gas-liquid mixture so as to be convenient for evaporation in a subsequent evaporator; the gas-liquid port of the main throttle valve is connected with the evaporator and used for conveying low-pressure liquid into the evaporator to perform heat exchange and evaporation to form refrigerant gas, and the gas outlet of the evaporator is connected with the compressor and used for conveying the refrigerant gas back to the compressor to be recycled;
the main pipeline is provided with a first bypass pipe for bypassing a part of liquid in a high-pressure state, the first bypass pipe is provided with a first throttle valve for throttling the liquid condensed into the high-pressure state into a gas-liquid mixture in a low-pressure state so as to be convenient for vaporizing into refrigerant gas in a low-temperature and low-pressure state in a subsequent economizer, and the first bypass pipe is connected with a gas-liquid port of the economizer and is used for exchanging heat between the gas-liquid mixture in the low-pressure state and the high-temperature and high-pressure refrigerant liquid;
the oil cooling device comprises an oil inlet of the oil cooling device, an oil outlet of the oil cooling device is connected with an oil inlet of the compressor, a hot gas outlet of the oil cooling device is connected with an air inlet of the compressor and used for recovering heat and finally releasing materials in a condenser of the heat pump unit, and a cold air inlet of the oil cooling device is connected with an air outlet of the economizer and used for exchanging heat between low-temperature low-pressure refrigerant gas and hot refrigeration oil.
According to the utility model discloses, the economizer is plate heat exchanger.
According to the utility model discloses, heat pump set still includes the solenoid valve, the solenoid valve sets up with main throttle valve is parallelly connected. And when the liquid supply amount of the main throttle valve meets the requirement of the heat pump system, closing the electromagnetic valve. When the main throttle valve reaches the set opening and the set value does not reach the standard, the solenoid valve opens the bypass to supply liquid. By adopting the structure, the load of the main throttle valve can be reduced, and the main throttle valve can adjust the flow in a relatively small load interval. Therefore, the model selection capacity of the main throttle valve can be reduced, and meanwhile, the liquid supply amount of the system is adjusted more simply and accurately.
As a second aspect of the utility model, a heat pump system comprises a steam source and the heat pump unit,
the feed inlet of the steam source is connected with the hot material outlet of the condenser and used for conveying the heat-exchanged material into the steam source for evaporation, and the cold material inlet of the condenser is connected with the material conveying pipe and used for heating the material;
the steam port of the steam source is connected with the solvent steam inlet of the evaporator and used for exchanging heat with low-pressure liquid in the evaporator, so that the utilization rate of heat energy is improved.
According to the utility model discloses, the steam source is for the equipment that needs heating material and can form steam with the evaporation of part or whole volatile component in the material.
Further, the steam source is an evaporation and concentration chamber and the like.
As a third aspect of the utility model, an evaporation concentration system comprises the heat pump system and the preheater, the steam source of the heat pump system is an evaporation concentration chamber,
the evaporation concentration chamber also comprises a material return port and a material discharge port;
the return port of the evaporation concentration chamber is connected with a cold material inlet of a condenser of the heat pump unit and is used for inputting materials into the condenser of the heat pump unit to be reheated;
a feed inlet of the preheater is connected with the material container and used for heating materials, and a feed pipe is arranged between the preheater and the material container;
the cold material inlet of the condenser of the heat pump unit is connected with the discharge hole of the preheater through a material conveying pipe and used for conveying the preheated material into the evaporation concentration chamber, or used for reheating the preheated material input by the preheater and conveying the reheated material into the evaporation concentration chamber.
According to the utility model, the evaporation concentration system also comprises a secondary condenser and a condensate tank, wherein a solvent condensate liquid outlet of an evaporator of the heat pump unit is connected with a liquid inlet of the secondary condenser and is used for sending condensate liquid after heat exchange into the secondary condenser for continuous cooling;
and a liquid outlet of the secondary condenser is connected with a condensate tank, and the condensate tank is used for recovering condensate.
Furthermore, the evaporation concentration system also comprises a vacuum pump, and the vacuum pump is connected with the condensate tank and used for enabling the system to be at a set negative pressure value and enabling the solvent to be continuously evaporated in the evaporation concentration chamber.
Furthermore, a liquid outlet pipe is arranged at the liquid outlet end of the condensate tank, a condensate pump is arranged on the liquid outlet pipe, condensate in the condensate tank is pumped out through the condensate pump, the condensate tank is connected with a solvent storage container, and the solvent storage container is used for recovering and storing the solvent pumped out by the condensate pump.
According to the utility model discloses, the feed back mouth of evaporative concentration room and the cold material import of heat pump set's condenser pass through the feed back union coupling, be equipped with the circulating pump on the feed back pipe for the not concentrated complete material input heat pump set with the evaporative concentration room reheats.
Furthermore, a second bypass pipe is connected between the feed back pipe and the feed pipe and is used for inputting the incompletely concentrated materials of the evaporation concentration chamber into the preheater for reheating.
According to the utility model discloses, be equipped with the charge pump on the inlet pipe, send the material in the material container to the pre-heater through the charge pump and preheat.
According to the utility model discloses, the bin outlet of evaporative concentration room is connected with the delivery pipe, be equipped with the discharge pump on the delivery pipe for discharge the material that evaporative concentration is good fast.
Further, a discharge port of the evaporation and concentration chamber is connected with a concentrated solution storage container.
According to the utility model discloses, the inlet end and the second steam source of pre-heater are connected for input steam and carry out preliminary preheating to the material.
Further, the second steam source is a device capable of evaporating part or all of volatile components in the material to form steam.
According to the utility model discloses, secondary condenser's feed liquor end is connected with the cooling water source for input cooling water, and carry out the secondary condensation to the condensate of heat pump set cooling.
The utility model discloses a heat pump set, its beneficial effect is:
1. refrigerant steam in a lower temperature state generated by the economizer in the heat pump unit in a circulating manner is used for cooling the refrigeration oil of the compressor, so that the heat of the refrigerant in the circulating manner is continuously remained in the heat pump unit while the engine oil is cooled, and the heat utilization rate is high; meanwhile, cooling equipment such as a cooling tower and the like is not required to be additionally provided, a complex pump set and a pipeline valve system are omitted, and the energy-saving and environment-friendly effects are achieved.
2. The electromagnetic valve and the main throttle valve are arranged in parallel, so that the model selection capacity of the main throttle valve can be reduced, and meanwhile, the liquid supply amount of the system can be adjusted more simply and accurately.
The utility model discloses a heat pump system, its beneficial effect is:
1. solvent steam in the steam source is used as a heat source, and the heat is recycled to heat the material and then enters the steam source, so that the heat is recycled in the whole system, and the energy-saving and environment-friendly effects are achieved; more specifically: heat in steam evaporated from the steam source is applied to the evaporator, so that refrigeration cycle is realized, and the compressor does not need to supplement refrigerant gas in a low-pressure state all the time, so that resources are saved; meanwhile, the material absorbs heat generated after heat exchange between the steam source and the heat pump unit so as to heat the material, and the heated material is used in the steam source, so that the utilization rate of heat energy can be greatly improved, the traditional steam source is replaced to directly heat cold materials, and the whole system is more efficient and energy-saving;
2. the solvent steam can automatically flow in the heat pump unit under the action of pressure difference, so that a complex pump set and a pipeline valve system are omitted;
3. the heat pump unit has high heating energy efficiency, can achieve 6.0, namely 1kw of power consumption, and can provide 6kw of heat.
The utility model discloses an evaporative concentration system with heat pump system, its beneficial effect is:
1. the vacuum pump is arranged, so that the whole evaporation and concentration process is carried out in a negative pressure state, the evaporation and concentration chamber can carry out evaporation and concentration at a lower temperature, and meanwhile, the loss of nutrient components or active components of heat-sensitive materials can be reduced; in addition, in a negative pressure environment, solvent steam can automatically flow in a heat pump unit under the action of pressure difference, so that a complex pump set and a pipeline valve system are omitted;
2. the heat pump unit recovers heat in steam evaporated from the evaporation concentration chamber and directly heats materials, and replaces the traditional evaporation concentration system to directly provide steam for heating the materials, so that the whole system is more efficient and energy-saving; meanwhile, the secondary condensation of the steam can be realized only by a small condensation heat exchanger and a small amount of cooling water.
3. The operation cost of the whole machine can be reduced to 25 percent of that of the traditional concentration process, and the cost is greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of a heat pump unit with an oil cooling device according to the present invention.
Fig. 2 is a schematic structural diagram of an evaporator of the heat pump unit of the present invention.
Fig. 3 is a schematic structural diagram of a condenser of the heat pump unit of the present invention.
Fig. 4 is a schematic structural view of a second baffle plate on the condenser.
Fig. 5 is another schematic structure diagram of the second baffle on the condenser.
Fig. 6 is another schematic structural diagram of the heat pump unit of the present invention.
Fig. 7 is a schematic structural diagram of the heat pump system of the present invention.
Fig. 8 is a schematic structural diagram of an evaporation concentration system of the present invention.
Wherein the direction of the arrows in the drawings is the direction of flow of the liquid or gas.
Detailed Description
The heat pump unit, the heat pump system and the evaporation concentration system with the oil cooling device of the present invention will be described in further detail with reference to the accompanying drawings.
Example 1
As shown in fig. 1, for the utility model discloses a heat pump set with oil cooling device for the evaporation concentration system, this heat pump set 2 includes evaporimeter 21, condenser 22, compressor 23, main throttle valve 24, economic ware 26 and oil cooling device 27, it has the refrigerant to pour into in the heat pump set 2, compressor 23 is used for compressing the refrigerant gas of low pressure state into the gas of high pressure state.
As shown in fig. 2, for the utility model discloses an evaporator for evaporative concentration system, including evaporator shell 210, be equipped with a plurality of first heat exchange tubes 211 in evaporator shell 210, first heat exchange tubes 211 are parallel to each other and are the rectangle array and distribute, evaporator shell 210's top and below middle part are equipped with solvent steam air inlet 212 and solvent condensate liquid outlet 213 respectively, evaporator shell 210's side is equipped with head 214, refrigerant entry 215 and refrigerant export 216, be equipped with homocline board 217 in the head 214 for make the even first heat exchange tubes 211 of entering of gas-liquid mixture ability, ensure that the heat transfer is respond well.
The refrigerant inlet 215 and the refrigerant outlet 216 are disposed on the same side of the evaporator shell 210, and a first baffle 219 is disposed in the head 214 on the side, so as to divide the head into a liquid inlet space and a liquid outlet space. The refrigerant inlet 215 is arranged below the refrigerant outlet 216, so that a good heat exchange effect is ensured. The lower first heat exchange tube 211 is a refrigerant inlet tube, and the upper first heat exchange tube 211 is a refrigerant outlet tube.
And a liquid-equalizing space is formed among the liquid-equalizing plate 217, the baffle 219 and the inner wall of the seal head 214, and a plurality of liquid-equalizing holes are formed in the liquid-equalizing plate 217.
A first air baffle 218 is disposed directly above the uppermost first heat exchange tube 211, so that the solvent vapor is dispersed around after passing through the first air baffle 218, and is rapidly filled in the evaporator shell 210, and is condensed into solvent condensate after being uniformly heat-exchanged with the refrigerant (i.e., gas-liquid mixture) in the first heat exchange tube 211, and flows out from the solvent condensate outlet 213.
The first air baffle 218 is a flat plate, and the front end and the rear end of the first air baffle 218 are welded on the inner wall of the evaporator shell 210, so that the solvent vapor is uniformly dispersed; gaps are left between the left and right ends of the first air baffle 218 and the evaporator housing 210, and solvent vapor can flow through the gaps.
As shown in fig. 3, for the utility model discloses a condenser for evaporative concentration system, including condenser casing 220, condenser casing 220's top and below are equipped with refrigerant air inlet 221 and refrigerant liquid outlet 222 respectively, condenser casing 220's side is equipped with head 225, cold material import 223 and hot material export 224, be equipped with a plurality of second heat exchange tubes 226 in the condenser casing 220, second heat exchange tube 226 is parallel to each other and is the distribution of rectangle array for the concentrated material solution of circulation treatment.
A second air baffle 227 is arranged between the refrigerant air inlet 221 and the second heat exchange tube 226 on the upper layer, so that refrigerant gas is scattered to the periphery after passing through the second air baffle 227 and is uniformly filled in the condenser shell 220, the phenomenon that part of the second heat exchange tube 226 is overheated is avoided, the materials are prevented from being burnt, and heated material solution flows out from the hot material outlet 224; as shown in fig. 4 and 5, the second gas baffle 227 is provided with a plurality of vent holes 228, the refrigerant inlet 221 is disposed right above the middle portion of the second gas baffle 227, and the middle portion of the second gas baffle 227 is not provided with vent holes, so as to prevent the refrigerant gas from directly impacting the second heat exchange tube 226.
The flow area of the vent holes in the second baffle 227 is gradually increased from the middle to both ends of the second baffle 227 to ensure that the refrigerant gas is in full contact with all the second heat exchange tubes 226, thereby achieving better heat exchange and avoiding overheating of part of the heat exchange tubes. For example, as shown in fig. 4, when the diameters of the vent holes 228 are uniform, the number of vent holes from the middle to both ends of the second baffle 227 gradually increases. For another example, as shown in fig. 5, when the number of the vent holes from the middle to both ends of the second baffle 227 is the same, the aperture of the vent holes from the middle to both ends of the second baffle 227 gradually increases.
The cold feed inlet 223 and the hot feed outlet 224 are disposed on the same side of the condenser housing 220. The cold material inlet is arranged below the hot material outlet, so that a good heat exchange effect is ensured. The second heat exchange tube at the lower part is a cold material inlet tube, and the second heat exchange tube at the upper part is a hot material outlet tube.
The second gas baffle 227 is a flat plate, and the front end and the rear end of the second gas baffle 227 are welded on the inner wall of the condenser shell 220. A gap is left between the left and right ends of the second baffle 227 and the condenser case 220, and refrigerant gas can flow therethrough.
As shown in fig. 1, a refrigerant inlet of the condenser 22 is connected to an outlet of the compressor 23, and is configured to exchange heat with a refrigerant gas at a high temperature and a high pressure and condense the refrigerant gas into a liquid at a high pressure; a refrigerant liquid outlet of the condenser 22 is connected with a liquid inlet of the economizer 26, a liquid outlet of the economizer 26 is connected with a liquid inlet of the main throttle valve 24 through a main pipeline 28, and the liquid condensed into a high-pressure state is throttled into a gas-liquid mixture in a low-pressure state so as to be evaporated in a subsequent evaporator 21; the gas-liquid port of the main throttle valve 24 is connected with the evaporator 21 and is used for conveying low-pressure liquid into the evaporator 21 for heat exchange and evaporation to form refrigerant gas, and the refrigerant outlet of the evaporator 21 is connected with the compressor 23 and is used for returning the refrigerant gas to the compressor 23 for cyclic utilization.
Be equipped with first bypass pipe 29 on the trunk line 28 for the liquid of the partly high pressure state of bypass, be equipped with first choke valve 20 on the first bypass pipe 29, be used for becoming the liquid throttle of high pressure state of condensation for the gas-liquid mixture of low pressure state, be convenient for vaporize into the refrigerant gas of low temperature low pressure state in the economic ware 26 of epilogue, first bypass pipe 29 is connected with economic ware 26's gas-liquid mouth for carry out the heat transfer with the gas-liquid mixture of low pressure state and high temperature high pressure refrigerant liquid.
An oil inlet of the oil cooling device 27 is connected with an oil outlet of the compressor 23, an oil outlet of the oil cooling device 27 is connected with an oil inlet of the compressor 23, a hot air outlet of the oil cooling device 27 is connected with an air inlet of the compressor 23 and used for recovering heat and finally releasing the heat to materials in the condenser 22 of the heat pump unit 2, and a cold air inlet of the oil cooling device 27 is connected with an air outlet of the economizer 26 and used for exchanging heat between low-temperature low-pressure refrigerant gas and hot refrigeration oil. It should be noted that the economizer 26 of the present embodiment is preferably a plate heat exchanger. The oil cooling device of the present embodiment is preferably an oil cooling heat exchanger.
The working process of the heat pump unit of the embodiment is as follows:
high-temperature compressor refrigeration oil is discharged from an oil outlet of the compressor 23 and enters the oil cooling heat exchanger to exchange heat with low-temperature refrigerant steam from the economizer 26, so that the refrigeration oil is cooled to a set temperature, heat is brought back to the compressor 23 by the refrigerant steam, and finally the heat is released to materials in a condenser 22 of the heat pump unit, and the heating capacity of the system is increased.
Example 2
As shown in fig. 6, in order to provide another heat pump unit of the present invention, the heat pump unit 2 includes an evaporator 21, a condenser 22, a compressor 23, a main throttle valve 24 and an electromagnetic valve 26. The structure and connection relationship of the evaporator 21, the condenser 22, the compressor 23, and the main throttle 24 are the same as those in embodiment 1. The difference is that the solenoid valve 26 of the heat pump unit 2 is arranged in parallel with the main throttle valve 24. When the liquid supply amount of the main throttle valve 24 meets the requirements of the heat pump system (i.e., indexes such as pressure, temperature and the like meet the requirements), the electromagnetic valve is closed. When the main throttle valve 24 reaches the set opening and the set value does not reach the standard, the electromagnetic valve opens the bypass liquid supply. By adopting the structure, the load of the main throttle valve can be reduced, and the main throttle valve can adjust the flow in a relatively small load interval. Therefore, the model selection capacity of the main throttle valve can be reduced, and meanwhile, the liquid supply amount of the system is adjusted more simply and accurately.
Example 3
As shown in fig. 7, a heat pump system according to the present invention includes a steam source 1 and a heat pump unit 2 according to embodiment 1 or 2.
The feed inlet 14 of the steam source 1 is connected with a hot material outlet of the condenser 22 and used for evaporating the material after heat exchange of the condenser 22, and a cold material inlet of the condenser 22 is connected with the material conveying pipe 25 and used for heating the material.
The steam port 11 of the steam source 1 is connected with the solvent steam inlet of the evaporator 21, and is used for exchanging heat with the low-pressure liquid in the evaporator 21, so that the utilization rate of heat energy is improved.
The steam source 1 of this embodiment is a device that needs to heat the material and can evaporate some or all of the volatile components in the material to form steam. It should be noted that the steam source 1 of this embodiment is preferably a device that requires heating of the concentrated material and is capable of evaporating some or all of the volatile components of the material to form steam. The steam source is preferably an evaporative concentration chamber.
The operation of the heat pump system of the present embodiment is as follows:
the refrigerant gas in a low-pressure state is compressed into a gas in a high-pressure state in the compressor 23, and the gas enters the condenser 22, in the heat exchanger, the refrigerant gas in a high-temperature and high-pressure state exchanges heat with the material, a large amount of heat is released to heat the material, and the material reaches a sufficient temperature and enters the steam source 1 to be evaporated.
Meanwhile, the refrigerant is subjected to heat exchange and condensation by the economizer 26 to form high-pressure liquid, flows to the main throttle valve 24, is throttled and expanded to form low-pressure liquid (gas-liquid-containing mixture), enters the evaporator 21 to absorb heat for evaporation, absorbs heat in solvent vapor into the heat pump system, and finally returns the refrigerant gas to the compressor 23 to be compressed, so that the whole cycle is completed. The heat is recycled in the system through the circulation work of the refrigerant, and an additional heat source, a pump set and a valve pipeline system are not needed.
Meanwhile, high-temperature compressor refrigeration oil is discharged from an oil outlet of the compressor 23 to enter the oil cooling heat exchanger to exchange heat with low-temperature refrigerant steam from the economizer 26, so that the refrigeration oil is cooled to a set temperature, heat is brought back to the compressor 23 by the refrigerant steam, and finally the heat is released to materials in a condenser 22 of the heat pump unit, and the heating capacity of the system is increased.
Example 4
As shown in fig. 8, an evaporation concentration system according to the present invention includes the heat pump system and the preheater 5 described in embodiment 3, the heat pump system includes an evaporation concentration chamber 1 and a heat pump unit 2, the evaporation concentration chamber 1 includes a steam port 11, a material return port 12, a material discharge port 13 and a material inlet 14; the feed inlet 14 of the evaporation concentration chamber 1 is connected with a hot material outlet of a condenser 22 of the heat pump unit 2 and is used for evaporating and concentrating materials input by the heat pump unit 2; the steam port 11 of the evaporation concentration chamber 1 is connected with a solvent steam inlet of an evaporator 21 of the heat pump unit 2, and is used for evaporating part or all volatile components in the materials to form steam and conveying the steam into the evaporator 21 of the heat pump unit 2; the feed back 12 of the evaporation concentration chamber 1 is connected with a cold material inlet of a condenser 22 of the heat pump unit 2 and used for inputting materials into the condenser 22 of the heat pump unit to be reheated. The feed inlet of the preheater 5 is connected with a material container (not shown in the figure) for heating the material, and a feed pipe 18 is arranged between the preheater 5 and the material container.
The cold material inlet of the condenser 22 of the heat pump unit 2 is connected with the discharge hole of the preheater 5 through a material conveying pipe 25, and is used for conveying the preheated material into the evaporation concentration chamber 1, or is used for reheating the preheated material input by the preheater and conveying the reheated material into the evaporation concentration chamber 1.
The evaporation concentration system also comprises a secondary condenser 3 and a condensate tank 4, wherein a solvent condensate liquid outlet of an evaporator 21 of the heat pump unit 2 is connected with a liquid inlet of the secondary condenser 3 and is used for sending condensate liquid after heat exchange into the secondary condenser 3 for continuous cooling; and a liquid outlet of the secondary condenser 3 is connected with a condensate tank 4, and the condensate tank 4 is used for recovering condensate.
The evaporation concentration system also comprises a vacuum pump 6, wherein the vacuum pump 6 is connected with the condensate tank 4 and is used for enabling the system to be at a set negative pressure value and enabling the solvent to be continuously evaporated in the evaporation concentration chamber 1.
A liquid outlet pipe 17 is arranged at the liquid outlet end of the condensate tank 4, a condensate pump 9 is arranged on the liquid outlet pipe 17, condensate in the condensate tank 4 is pumped out through the condensate pump 9, the condensate tank 4 is connected with a solvent storage container (not shown in the figure), and the solvent storage container is used for recovering and storing the solvent pumped out by the condensate pump 9.
The feed back 12 of the evaporation concentration chamber 1 is connected with the cold material inlet of the condenser 21 of the heat pump unit 2 through a feed back pipe 15, and the feed back pipe 15 is provided with a circulating pump 7 for inputting the materials which are not completely concentrated in the evaporation concentration chamber 1 into the heat pump unit 2 for reheating.
A second bypass pipe 19 is connected between the feed back pipe 15 and the feed pipe 18, and is used for inputting the incompletely concentrated materials of the evaporation and concentration chamber 1 into the preheater 5 for reheating.
The feeding pipe 18 is provided with a feeding pump 10, and materials in the material container are sent to the preheater 5 through the feeding pump 10 to be preheated.
The discharge outlet 13 of the evaporation concentration chamber 1 is connected with a discharge pipe 16, and a discharge pump 8 is arranged on the discharge pipe 16 and used for rapidly discharging the evaporated and concentrated materials. The other end of the discharge pipe 16 may be connected to a concentrate storage container (not shown) for collecting concentrate.
The inlet end of the preheater 5 is connected with a second steam source (the second steam source is a device capable of evaporating part or all of volatile components in the material to form steam, for example, a steam outlet of a heating water tank, etc.), and is used for inputting steam and preliminarily preheating the material. Because heat pump set 2 is direct to be connected with evaporative concentration room 1, can carry out circulation heating to the material, consequently the evaporative concentration system of this embodiment only needs very little pre-heater to and this pre-heater only needs a small amount of steam.
The liquid inlet end of the secondary condenser 3 is connected with a cooling water source (for example, a liquid inlet of a cooling water tank, a tap water pipe and the like) and used for inputting cooling water and carrying out secondary condensation on the condensate cooled by the heat pump unit 2. Moreover, since the heat pump unit 2 has already cooled the steam in the evaporation concentration chamber 1 once, the evaporation concentration system of the embodiment only needs a small condensing heat exchanger and a small amount of cooling water.
The operation of the evaporative concentration system of this example is as follows:
firstly, a feeding pump 10 is turned on to supplement materials into the evaporation concentration system, the materials are input into a preheater 5, and the materials are preheated by the preheater 5, so that the materials reach the set liquid level and temperature.
And then, starting the vacuum pump 6, pumping the system to negative pressure and reaching a set negative pressure value, so that the solvent is continuously evaporated in the evaporation and concentration chamber 1. At this time, the heat pump unit 2 is started to continuously recycle the heat contained in the solvent steam to heat the material. Simultaneously, send into heat pump set 2 through circulating pump 7 with the material of evaporative concentration room 1 below and carry out the heat transfer, so reciprocal going on, bring the heat into evaporative concentration room 1 through circulating pump 7 and make the material evaporative concentration always. And/or the material in the material return pipe 15 enters the preheater 5 through the second bypass pipe 19 to be preheated, and then is sent into the heat pump unit 2, and the operation is repeated.
When the concentration of the materials reaches the set concentration, the discharging pump 8 is automatically started, and the treated materials are collected and stored. And the evaporated solvent is cooled and condensed after heat is extracted by the heat pump unit 2, then enters the secondary condenser 3 to be continuously cooled to the rated temperature, and enters the condensate tank 4, and when the liquid level of the condensate tank 4 rises to a set value, the condensate pump 9 is started to pump out the solvent for recycling and storage.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A heat pump unit with an oil cooling device is characterized by comprising an evaporator, a condenser, a compressor, a main throttle valve, an economizer and the oil cooling device,
a refrigerant inlet of the condenser is connected with an air outlet of the compressor, a refrigerant outlet of the condenser is connected with a liquid inlet of the economizer, and a liquid outlet of the economizer is connected with a liquid inlet of the main throttle valve through a main pipeline; the gas-liquid port of the main throttle valve is connected with the evaporator, and the gas outlet of the evaporator is connected with the compressor;
a first bypass pipe is arranged on the main pipe, a first throttling valve is arranged on the first bypass pipe, and the first bypass pipe is connected with a gas-liquid port of the economizer;
an oil inlet of the oil cooling device is connected with an oil outlet of the compressor, an oil outlet of the oil cooling device is connected with an oil inlet of the compressor, a hot gas outlet of the oil cooling device is connected with an air inlet of the compressor, and a cold gas inlet of the oil cooling device is connected with a gas outlet of the economizer.
2. The heat pump unit with the oil cooling device according to claim 1, further comprising an electromagnetic valve disposed in parallel with the main throttle valve.
3. A heat pump system, characterized in that, comprises a steam source and the heat pump unit of claim 1, the steam source comprises a feed inlet and a steam outlet,
a feed inlet of the steam source is connected with a hot material outlet of the condenser, and a cold material inlet of the condenser is connected with the material conveying pipe;
the steam port of the steam source is connected with the solvent steam inlet of the evaporator.
4. The heat pump system of claim 3, wherein the source of vapor is a device that requires heating of the material and is capable of evaporating some or all of the volatile components of the material to form vapor.
5. An evaporative concentration system comprising the heat pump system of claim 3 or 4 and a preheater, the vapor source of the heat pump system being an evaporative concentration chamber,
the evaporation concentration chamber also comprises a material return port and a material discharge port;
a feed back port of the evaporation concentration chamber is connected with a cold material inlet of a condenser of the heat pump unit;
a feed inlet of the preheater is connected with the material container; a feeding pipe is arranged between the preheater and the material container;
the cold material inlet of the condenser of the heat pump unit is connected with the discharge hole of the preheater through a material conveying pipe.
6. The evaporative concentration system according to claim 5, further comprising a secondary condenser and a condensate tank, wherein a solvent condensate outlet of the evaporator of the heat pump unit is connected to a liquid inlet of the secondary condenser;
and a liquid outlet of the secondary condenser is connected with the condensate tank.
7. The evaporative concentration system of claim 6, further comprising a vacuum pump connected to the condensate tank.
8. The evaporative concentration system of claim 6, wherein the return port of the evaporative concentration chamber and the cold feed inlet of the condenser are connected by a return line, and wherein the return line is provided with a circulation pump.
9. The evaporative concentration system of claim 8, wherein a second bypass line is connected between the return line and the feed line.
10. The evaporative concentration system according to claim 6, wherein a liquid outlet pipe is provided at a liquid outlet end of the condensate tank, a condensate pump is provided on the liquid outlet pipe, and the condensate tank is connected to a solvent storage container;
a feeding pump is arranged on the feeding pipe;
a discharge pipe is connected with a discharge port of the evaporation concentration chamber, and a discharge pump is arranged on the discharge pipe;
the air inlet end of the preheater is connected with a second steam source;
and the liquid inlet end of the secondary condenser is connected with a cooling water source.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112451982A (en) * | 2020-12-02 | 2021-03-09 | 复旦大学 | Evaporation equipment for removing organic solvent in fluid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112451982A (en) * | 2020-12-02 | 2021-03-09 | 复旦大学 | Evaporation equipment for removing organic solvent in fluid |
| CN112451982B (en) * | 2020-12-02 | 2021-08-13 | 复旦大学 | Evaporation equipment for removing organic solvent in fluid |
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