CN221223003U

CN221223003U - Heating device

Info

Publication number: CN221223003U
Application number: CN202323058155.4U
Authority: CN
Inventors: 马强; 薛永; 徐博
Original assignee: Truking Watertown Pharmaceutical Equipment Co Ltd
Current assignee: Truking Watertown Pharmaceutical Equipment Co Ltd
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2024-06-25
Anticipated expiration: 2033-11-13

Abstract

The application relates to a heating device. The heat supply device comprises a water tank, a heat pump assembly, a pure steam system, a multi-effect evaporator and a heat utilization system. The heat utilization system is arranged between the water outlet of the water tank and the evaporation side inlet of the heat pump assembly in a communicated manner, and the water outlet of the water tank is used for inputting heat conduction fluid into the heat utilization system; the pure steam system and the condensation side of the heat pump component form a circulation loop; the evaporation side outlet of the heat pump assembly is communicated with the multi-effect evaporator, and the heat pump assembly is used for receiving the heat-conducting fluid flowing through the heat utilization system through the evaporation side inlet and discharging the heat-conducting fluid to the multi-effect evaporator through the evaporation side outlet of the heat pump assembly, so that heat is taken away in the process that the heat-conducting fluid flows through the multi-effect evaporator, and a good cooling effect is achieved on the multi-effect evaporator; the pure steam system and the multi-effect evaporator are communicated with the water inlet of the water tank. The heating device provided by the application has the advantages of being capable of collecting and utilizing more waste heat, and accords with the concept of energy conservation and emission reduction.

Description

Heating device

Technical Field

The application relates to the technical field of pharmaceutical water equipment, in particular to a heating device.

Background

A number of systems in pharmaceutical water facilities require heat sources for heating, such as water for injection distribution systems, RO systems, and steam generation systems. The traditional pharmaceutical water equipment needs a plurality of heat sources to heat the systems respectively, consumes a large amount of energy sources, and does not accord with the production concept of energy conservation and emission reduction.

Disclosure of Invention

Based on the above, it is necessary to provide a heating device for solving the problem of high energy consumption of pharmaceutical equipment.

A heating apparatus, the heating apparatus comprising:

the system comprises a water tank, a heat pump assembly, a pure steam system, a multi-effect evaporator and a heat utilization system;

The heat pump assembly has an evaporating side and a condensing side for heat exchange;

The water outlet of the water tank is communicated with the evaporation side inlet of the heat pump assembly, the heat utilization system is arranged between the water outlet of the water tank and the evaporation side inlet of the heat pump assembly in a communicated manner, and the water outlet of the water tank is used for inputting heat conduction fluid into the heat utilization system;

The water outlet of the pure steam system is communicated with the condensing side inlet of the heat pump assembly, and the water inlet of the pure steam system is communicated with the condensing side outlet of the heat pump assembly;

The evaporation side outlet of the heat pump assembly is communicated with the multi-effect evaporator, and the heat pump assembly is used for receiving the heat conduction fluid flowing through the heat utilization system through the evaporation side inlet and discharging the heat conduction fluid to the multi-effect evaporator through the evaporation side outlet of the heat pump assembly, so that heat is taken away in the process of flowing through the multi-effect evaporator by the heat conduction fluid, and a good cooling effect is achieved on the multi-effect evaporator;

The pure steam system and the multi-effect evaporator are communicated with a water inlet of the water tank.

In one embodiment, the heating device further comprises a first heat exchanger provided with a cold fluid inlet, a cold fluid outlet, a hot fluid inlet and a hot fluid outlet, the hot fluid inlet of the first heat exchanger being in communication with the water outlet of the water tank, the hot fluid outlet of the first heat exchanger being in communication with the evaporation side inlet of the heat pump assembly, the cold fluid inlet of the first heat exchanger being in communication with the water outlet of the pure steam system, the cold fluid outlet of the first heat exchanger being in communication with the condensation side inlet of the heat pump assembly.

In one embodiment, the first heat exchanger is a shell-and-tube heat exchanger.

In one embodiment, the heating apparatus further comprises a water pump connected to the water tank, the water pump being configured to discharge the heat transfer fluid in the water tank to the heat utilization system, and a controller configured to identify a level of the liquid in the water tank, and to control an operating state of the water pump.

In one embodiment, the heat pump assembly comprises a first heat pump and a second heat pump, both provided with an evaporation side and a condensation side, the evaporation side of the first heat pump being connected with the evaporation side of the second heat pump, the condensation side of the first heat pump being connected with the condensation side of the second heat pump.

In one embodiment, the heat utilization system comprises a water injection distribution system and a second heat exchanger provided with a cold fluid inlet, a cold fluid outlet, a hot fluid inlet and a hot fluid outlet, the cold fluid outlet and the cold fluid inlet of the second heat exchanger respectively communicating with the water injection distribution system to form a circulating waterway, the hot fluid inlet of the second heat exchanger communicating with the water outlet of the water tank, and the hot fluid outlet of the second heat exchanger communicating with the hot fluid inlet of the first heat exchanger.

In one embodiment, the heat utilization system further comprises an RO system and a third heat exchanger provided with a cold fluid inlet, a cold fluid outlet, a hot fluid inlet and a hot fluid outlet, the cold fluid outlet and the cold fluid inlet of the third heat exchanger being in communication with the inlet and the outlet of the RO system, respectively, to form a circulating water circuit, the hot fluid inlet of the third heat exchanger being in communication with the hot fluid outlet of the second heat exchanger, the hot fluid outlet of the third heat exchanger being in communication with the hot fluid inlet of the first heat exchanger.

In one embodiment, the heating apparatus further comprises a drain line, the water tank being connected to the drain line, the drain line being for draining water in the water tank.

In one embodiment, the evaporation side outlet of the heat pump assembly is in communication with the drain line.

In one embodiment, the heat pump assembly includes a plurality of butterfly valves disposed at an evaporation side inlet, an evaporation side outlet, a condensation side inlet, and a condensation side outlet of the heat pump assembly, respectively.

In the heat supply device, the heat conduction fluid in the water tank provides heat for the heat utilization system, and the heat pump assembly transfers the waste heat of the heat conduction fluid so as to provide more waste heat for the pure steam system and promote the generation of steam of the pure steam system; the heat conduction fluid is cooled after heat supply and is used for promoting the cooling of the multi-effect evaporator so as to improve the steam generation amount of the multi-effect evaporator, and the steam is condensed into high-temperature condensation water and stored in the water tank, so that the waste heat is collected and can be continuously utilized, and the design concept of energy conservation and emission reduction is met.

Drawings

Fig. 1 is a schematic view of a heating apparatus according to an embodiment of the application.

Fig. 2 is an enlarged schematic view at a in fig. 1.

Fig. 3 is an enlarged schematic view at B in fig. 1.

Fig. 4 is a schematic view of a heating apparatus according to another embodiment of the application.

10. A water tank; 11. a drainage pipeline; 20. a heat pump assembly; 21. a first heat pump; 22. a second heat pump; 30. a pure steam system; 31. a pure steam generator; 40. a multiple effect evaporator; 50. a heat utilization system; 51. a water injection distribution system; 52. a second heat exchanger; 53. an RO system; 54. a third heat exchanger; 60. a first heat exchanger; 70. a water pump; 71. a centrifugal pump; 80. a controller; 81. a hydraulic valve; 90. butterfly valve.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

An embodiment of the present application provides a heating apparatus, referring to fig. 1 to 3, including a water tank 10, a heat pump assembly 20, a pure steam system 30, a multi-effect evaporator 40, and a heat utilization system 50. The heat pump assembly 20 has an evaporating side and a condensing side for heat exchange; the water tank 10 is used for storing heat-conducting fluid, the water outlet of the water tank 10 is communicated with the evaporation side inlet of the heat pump assembly 20, the heat utilization system 50 is arranged between the water outlet of the water tank 10 and the evaporation side inlet of the heat pump assembly 20 in a communicating manner, and the water outlet of the water tank 10 is used for inputting the heat-conducting fluid into the heat utilization system 50; the vapor side inlet of the heat pump assembly 20 is for receiving a heat transfer fluid flowing through the heat utilization system 50; the water outlet of the pure steam system 30 is communicated with the condensing side inlet of the heat pump assembly 20, and the water inlet of the pure steam system 30 is communicated with the condensing side outlet of the heat pump assembly 20; the evaporation side outlet of the heat pump assembly 20 is communicated with the multi-effect evaporator 40, the heat pump assembly 20 is used for receiving the heat conduction fluid flowing through the heat utilization system 50 through the evaporation side inlet and discharging the heat conduction fluid to the multi-effect evaporator 40 through the evaporation side outlet of the heat pump assembly 20, so that heat is taken away in the process that the heat conduction fluid flows through the multi-effect evaporator 40, and a good cooling effect is achieved on the multi-effect evaporator 40; the pure steam system 30 and the multi-effect evaporator 40 are in communication with the water inlet of the water tank 10.

According to the heating device provided by the application, heat conduction fluid in the water tank 10 provides heat for the heat utilization system 50, and the heat pump assembly 20 transfers waste heat of the heat conduction fluid so as to provide more waste heat for the pure steam system 30 and promote the generation of steam of the pure steam system 30; the heat-conducting fluid is cooled after heat supply and is used for promoting the cooling of the multi-effect evaporator 40 so as to improve the steam generation amount of the multi-effect evaporator 40; the steam is condensed into high-temperature condensed water and stored in the water tank 10, so that the waste heat is collected and can be continuously utilized, and the design concept of energy conservation and emission reduction is met.

Specifically, the tank 10 can store hot water and provide a thermal insulation effect, and in the embodiment of the present application, the hot water circulates as a heat-conducting fluid in the heating device.

Hot water flows into the heat utilization system 50 through the water outlet of the water tank 10, the hot water supplies heat to the heat utilization system 50, and flows into the pure steam system 30 through the evaporation side water inlet of the heat pump assembly 20, and supplies heat to the pure steam system 30, so that the steam yield is improved, and the yield of high-temperature condensed water is improved.

At least one pure steam generator 31 is included in the pure steam system 30. The pure steam generator 31 is a device dedicated to the generation of high purity steam. The pure steam generator 31 generates high purity steam by heating water above its boiling point and separating the generated steam from impurities in the water. In the present embodiment, the condensed water temperature generated by the pure steam generator 31 is about 97 ℃. On one hand, the condensate water has extremely high purity, and can be used for pharmacy after being cooled; on the other hand, the condensed water can also flow to the water inlet of the water tank 10 through a pipeline and be recovered in the water tank 10 for heat preservation and storage.

The heat pump assembly 20 has an evaporating side and a condensing side, and fluid flowing through the evaporating side may transfer its own heat to fluid flowing through the condensing side. In this embodiment, the hot water in the water tank 10 flows into the evaporation side of the heat pump assembly 20, and transfers heat to the water circulation loop communicated with the pure steam generation system through heat exchange, so that the temperature of the water entering the pure steam generator 31 is raised, and the evaporation efficiency is higher.

The multiple effect evaporator 40 is a highly efficient heat transfer device for separating solutes in a liquid. It operates by a combination of multiple evaporators (not shown) and condensers (not shown) using the multistage evaporation principle. Wherein, the condenser needs to be cooled by introducing cooling water. In this embodiment, after the heat exchange of the heat pump assembly 20, the temperature of the water discharged from the evaporation side of the heat pump assembly 20 can be reduced to 9 ℃, and compared with the water without the heat exchange, the temperature of the water after the heat exchange of the heat pump assembly 20 is lower, and the water is introduced into the condenser of the multi-effect evaporator 40 to provide a better cooling effect, so that the yield of the condensed water can be improved.

In some embodiments, the heating apparatus further comprises a first heat exchanger 60, the first heat exchanger 60 being provided with a cold fluid inlet, a cold fluid outlet, a hot fluid inlet and a hot fluid outlet, the hot fluid inlet of the first heat exchanger 60 being in communication with the water outlet of the water tank 10, the hot fluid outlet of the first heat exchanger 60 being in communication with the evaporation side inlet of the heat pump assembly 20, the cold fluid inlet of the first heat exchanger 60 being in communication with the water outlet of the pure steam system 30, the cold fluid outlet of the first heat exchanger 60 being in communication with the condensation side inlet of the heat pump assembly 20.

Taking the first heat exchanger 60 shown in fig. 1 as an example, the first heat exchanger 60 is a shell-and-tube heat exchanger. The cold fluid inlet and the cold fluid outlet of the shell-and-tube heat exchanger are respectively arranged at two axial ends of the heat exchanger, and the hot fluid inlet and the hot fluid outlet are respectively arranged on the tube body of the heat exchanger. The cold fluid inlet communicates with the water outlet of the pure steam system 30, the cold fluid outlet communicates with the condensing side inlet of the heat pump assembly 20, and the condensing side outlet of the heat pump assembly 20 communicates with the water inlet of the pure steam system 30, such that the first heat exchanger 60, the heat pump assembly 20, and the pure steam system 30 form a circulating water path. Referring to fig. 1 and 3, hot water in the water tank 10 flows through the heat using system 50 and provides heat to the heat using system 50, and the hot water flows into the hot fluid inlet of the first heat exchanger 60 through the hot fluid inlet, and the hot water heats water entering the first heat exchanger 60 through the cold fluid inlet. In this embodiment, the water flowing out from the water outlet of the pure steam system 30 is heated to about 50 ℃ after flowing through the first heat exchanger 60, flows into the condensation side inlet of the heat pump assembly 20, and when flowing out from the condensation side outlet of the heat pump assembly 20, the temperature is further raised to about 70 ℃ and returns to the water inlet of the pure steam system 30. By providing the first heat exchanger 60, heat exchange may be more efficient to increase the steam production of the pure steam system 30.

In some embodiments, the heating apparatus further includes a water pump 70 and a controller 80, the water pump 70 is connected to the water tank 10, the water pump 70 is used to discharge water in the water tank 10 to the heating system 50, and the controller 80 is used to identify a level of water in the water tank 10 and control an operation state of the water pump 70.

Illustratively, referring to fig. 1 and 2, a centrifugal pump 71 is provided in the line between the water outlet of the tank 10 and the heat utilization system 50, and a controller 80 includes a hydraulic valve 81, a sensor (not shown) that recognizes the level of the liquid in the tank 10, and a circuit board (not shown). In the present embodiment, when the liquid level in the water tank 10 reaches 70%, the sensor sends an electrical signal to the circuit board, which controls the centrifugal pump 71 to be started and simultaneously controls the hydraulic valve 81 to be opened, so that the hot water in the water tank 10 is discharged to the heat utilization system 50. By arranging the water pump 70 and the controller 80, the hot water for circulation in the heating device can be automatically supplemented, and the circulation state is always maintained so as to fully recover the waste heat. In other embodiments, the controller 80 may also be configured to control the operation of the water pump 70, such as 60% or 80% or the like, when it is recognized that the level of the liquid in the tank 10 reaches other proportions.

In some embodiments, the heat pump assembly 20 comprises a first heat pump 21 and a second heat pump 22, the first heat pump 21 and the second heat pump 22 each being provided with an evaporation side and a condensation side, the evaporation side of the first heat pump 21 being connected to the evaporation side of the second heat pump 22, the condensation side of the first heat pump 21 being connected to the condensation side of the second heat pump 22. Illustratively, the evaporating side of the first heat pump 21 communicates with the evaporating side of the second heat pump 22, and the condensing side of the first heat pump 21 communicates with the condensing side of the second heat pump 22. Referring to fig. 3, in particular, the hot fluid outlet of the first heat exchanger 60 communicates with the evaporating side of the first heat pump 21, and the evaporating side of the first heat pump 21 communicates with the evaporating side of the second heat pump 22. The cold fluid outlet of the first heat exchanger 60 communicates with the condensing side of the first heat pump 21, and the condensing side of the first heat pump 21 communicates with the condensing side of the second heat pump 22. In the present embodiment, by providing the first heat pump 21 and the second heat pump 22, the two heat pumps can exchange heat more sufficiently, further improving the waste heat utilization efficiency, so that the hot water flowing through the evaporation side of the first heat pump 21 and the evaporation side of the second heat pump 22 can transfer more heat to the water in the circulating waterway formed by the first heat exchanger 60, the heat pump assembly 20 and the pure steam system 30.

In some embodiments, the heat using system 50 further comprises a water for injection distribution system 51 and a second heat exchanger 52, the second heat exchanger 52 being provided with a cold fluid inlet, a cold fluid outlet, a hot fluid inlet and a hot fluid outlet, the cold fluid outlet and the cold fluid inlet of the second heat exchanger 52 being in communication with the water for injection distribution system 51, respectively, to form a circulation loop, the hot fluid inlet of the second heat exchanger 52 being in communication with the water outlet of the water tank 10, the hot fluid outlet of the second heat exchanger 52 being in communication with the hot fluid inlet of the second heat exchanger 52.

The water for injection dispensing system 51 is important in the medical and pharmaceutical fields for ensuring that the water source used during medical injection, pharmaceutical manufacturing and laboratory research is pure and reliable to ensure patient safety and product quality. Referring to fig. 4, in another embodiment of the present application, the second heat exchanger 52 may circularly heat the water in the injection water distribution system 51 by using the hot water flowing out of the water tank 10, and in this embodiment, the second heat exchanger 52 maintains the water temperature in the injection water distribution system 51 at about 76 ℃ by means of heat exchange.

In some embodiments, the heat utilization system 50 further includes an RO system 53 and a third heat exchanger 54, the third heat exchanger 54 being provided with a cold fluid inlet, a cold fluid outlet, a hot fluid inlet, and a hot fluid outlet, the cold fluid outlet and the cold fluid inlet of the third heat exchanger 54 being in communication with the inlet and the outlet of the RO system 53, respectively, to form a circulation loop, the hot fluid inlet of the third heat exchanger 54 being in communication with the hot fluid outlet of the second heat exchanger 52, the hot fluid outlet of the third heat exchanger 54 being in communication with the hot fluid inlet of the first heat exchanger 60.

RO (Reverse Osmosis) systems, i.e. reverse osmosis systems. The reverse osmosis system is a common module for producing water for pharmacy, and can be used for pretreating water and removing impurities. The third heat exchanger 54 can heat the water in the RO system 53 by using the hot water flowing out of the second heat exchanger 52, and in this embodiment, the third heat exchanger 54 heats the water in the RO system 53 to 25 ℃ by means of heat exchange, which is more suitable for pharmaceutical production. On the other hand, after the hot water flows out from the second heat exchanger 52, the third heat exchanger 54 increases the temperature of the water in the RO system 53, thereby further utilizing the waste heat of the hot water and achieving the energy saving effect.

In some embodiments, the heat pump assembly 20 includes a plurality of butterfly valves 90, the plurality of butterfly valves 90 being disposed at an evaporation side inlet, an evaporation side outlet, a condensation side inlet, and a condensation side outlet, respectively, of the heat pump assembly 20. Referring to fig. 3, illustratively, butterfly valves 90 are provided at the evaporation side inlet, evaporation side outlet, condensation side inlet, and condensation side outlet of the first heat pump 21, and butterfly valves 90 are provided at the evaporation side inlet, evaporation side outlet, condensation side inlet, and condensation side outlet of the second heat pump 22. The butterfly valve 90 is used as a simple-structure regulating valve, is easy to operate, and is convenient to control the flow of the first heat pump 21 and the second heat pump 22 so as to regulate the heat exchange temperature according to actual needs.

In some embodiments, the heating apparatus further includes a drain line 11, the water tank 10 being connected to the drain line 11, the drain line 11 being for draining water in the water tank 10. Referring to fig. 1 and 4, a drain line 11 is illustratively provided with one end communicating with the interior space of the tank 10 and the other end located outside the tank 10. The drain line 11 is provided with an electric valve electrically connected to the controller 80, and thus the opening and closing of the electric valve can be automatically controlled by the controller 80. When the water stored in the water tank 10 is too much, the electric valve can be opened, so that the water can be discharged through the water discharge pipeline 11, the water stored in the water tank 10 is prevented from being too much and the pressure is prevented from being too much, and the water tank 10 is protected from being damaged.

In some embodiments, the evaporation side outlet of the heat pump assembly 20 communicates with the drain line 11. Illustratively, referring to fig. 1 and 4, the evaporation side of the second heat pump 22 is in communication with the drain line 11, which may drain water from the heat pump assembly 20, facilitating cleaning of the interiors of the first heat pump 21 and the second heat pump 22 after draining.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims

1. A heating apparatus, characterized in that the heating apparatus comprises:

2. A heating arrangement according to claim 1, further comprising a first heat exchanger provided with a cold fluid inlet, a cold fluid outlet, a hot fluid inlet and a hot fluid outlet, the hot fluid inlet of the first heat exchanger being in communication with the water outlet of the water tank, the hot fluid outlet of the first heat exchanger being in communication with the evaporation side inlet of the heat pump assembly, the cold fluid inlet of the first heat exchanger being in communication with the water outlet of the pure steam system, the cold fluid outlet of the first heat exchanger being in communication with the condensation side inlet of the heat pump assembly.

3. A heating arrangement according to claim 2, wherein the first heat exchanger is a shell-and-tube heat exchanger.

4. A heating apparatus according to claim 1, further comprising a water pump connected to the water tank for discharging the heat transfer fluid in the water tank to the heat utilization system, and a controller for identifying the level of the liquid in the water tank and controlling the operation state of the water pump.

5. A heating arrangement according to claim 1, wherein the heat pump assembly comprises a first heat pump and a second heat pump, both provided with an evaporation side and a condensation side, the evaporation side of the first heat pump being connected to the evaporation side of the second heat pump, the condensation side of the first heat pump being connected to the condensation side of the second heat pump.

6. A heating apparatus according to claim 2 or 3, wherein the heat utilization system comprises a water injection distribution system and a second heat exchanger provided with a cold fluid inlet, a cold fluid outlet, a hot fluid inlet and a hot fluid outlet, the cold fluid outlet and cold fluid inlet of the second heat exchanger being in communication with the water injection distribution system respectively to form a circulating water circuit, the hot fluid inlet of the second heat exchanger being in communication with the water outlet of the water tank, the hot fluid outlet of the second heat exchanger being in communication with the hot fluid inlet of the first heat exchanger.

7. A heating plant according to claim 6, wherein the heat utilization system further comprises an RO system and a third heat exchanger provided with a cold fluid inlet, a cold fluid outlet, a hot fluid inlet and a hot fluid outlet, the cold fluid outlet and the cold fluid inlet of the third heat exchanger being in communication with the inlet and the outlet of the RO system, respectively, to form a circulating water circuit, the hot fluid inlet of the third heat exchanger being in communication with the hot fluid outlet of the second heat exchanger, the hot fluid outlet of the third heat exchanger being in communication with the hot fluid inlet of the first heat exchanger.

8. A heating apparatus according to claim 1, further comprising a drain line, the water tank being connected to the drain line, the drain line being for draining water in the water tank.

9. A heating arrangement according to claim 8, wherein the evaporation side outlet of the heat pump assembly is in communication with the drain line.

10. A heating arrangement according to claim 1, wherein the heat pump assembly comprises a plurality of butterfly valves, the plurality of butterfly valves being arranged at the evaporation side inlet, evaporation side outlet, condensation side inlet and condensation side outlet of the heat pump assembly, respectively.