Superheated steam heat pump system

Abstract

The utility model belongs to the technical field of superheated steam generating equipment, and particularly relates to a superheated steam heat pump system, which comprises a flash tank, a first steam outlet, a second steam outlet and a heat pump, the compressor, the first condenser, the expansion valve and the evaporator are communicated through a refrigerant pipeline, a steam inlet and a second steam outlet are formed in the first condenser, the steam inlet is communicated with the first steam outlet, saturated steam is heated into superheated steam through the first condenser, and the superheated steam is conveyed to a using end through the second steam outlet; the evaporator is provided with a second circulation inlet and a second circulation outlet, the second circulation inlet is communicated with liquid or gas with waste heat, the waste heat in the liquid or gas is recovered through the evaporator, and the liquid or gas subjected to heat exchange is discharged through the second circulation outlet. The device is simple and ingenious in overall structure, convenient to control and high in heat energy efficiency.

Description

Technical Field

[0001] The present application belongs to the technical field of superheated steam generating equipment, and in particular, relates to a superheated steam heat pump system. Background Art

[0002] Superheated steam is a drier steam obtained by heating a liquid directly to saturated steam that evaporates completely and then continuing to heat it. Superheated steam is widely used in industrial industries, such as food processing plants, oil refineries and chemical plants, etc. At present, the commonly used superheated steam generating equipment is a boiler, including coal-fired boilers, gas boilers, electric boilers, etc. Its working principle is to heat water to a certain temperature and pressure through a boiler to evaporate it and collect the steam for superheating treatment.

[0003] With respect to the above-mentioned existing related technologies, the inventor believes that there are the following technical defects: the overall structure of the equipment used in the process of preparing superheated steam by the boiler is complex and the thermal energy efficiency is low. In view of this, the existing related technologies need to be further improved. Utility Model Content

[0004] The embodiment of the present application provides a superheated steam heat pump system to solve the technical problems existing in the existing related technologies: the overall structure of the equipment used in the process of preparing superheated steam through a boiler is complex and the thermal energy efficiency is low.

[0005] The embodiment of the present application provides a superheated steam heat pump system, comprising:

[0006] A flash tank for generating saturated steam, wherein the flash tank is provided with a first steam outlet; and a compressor, a first condenser, an expansion valve and an evaporator connected through a refrigerant pipeline, wherein:

[0007] The first condenser is provided with a steam inlet and a second steam outlet, the steam inlet is communicated with the first steam outlet, the saturated steam is heated into superheated steam through the first condenser, and the superheated steam is transported to the use end through the second steam outlet;

[0008] The evaporator is provided with a second circulation inlet and a second circulation outlet. The second circulation inlet is connected to a liquid or gas with waste heat. The waste heat in the liquid or gas is recovered through the evaporator, and the waste water after heat exchange is discharged through the second circulation outlet.

[0009] Optionally, it also includes a second condenser, which is connected between the first condenser and the evaporator through a refrigerant pipe, and the second condenser is provided with a third water circulation inlet and a third water circulation outlet, and the flash tank is provided with a first water circulation inlet and a first water circulation outlet, the third water circulation inlet is connected to the first water circulation outlet, and the third water circulation outlet is connected to the first water circulation inlet.

[0010] Optionally, an electromagnetic heater is further included, the electromagnetic heater includes an electromagnetic coil, the second steam outlet is connected to a gas pipe, and the electromagnetic coil is arranged around the gas pipe.

[0011] Optionally, a gas-liquid separator is further included, and the gas-liquid separator is connected between the refrigerant inlet of the compressor and the refrigerant outlet of the evaporator through a refrigerant pipeline.

[0012] Optionally, a filter is further included, and the filter is connected between the refrigerant outlet of the second condenser and the refrigerant inlet of the expansion valve through a refrigerant pipeline.

[0013] Optionally, a water level meter is further included, which is arranged in the flash tank and is used to monitor the liquid level in the flash tank.

[0014] Optionally, it also includes a cold water replenishment pipeline, one end of which is connected to the flash tank, and the other end of which is connected to an external cold water source.

[0015] Optionally, the second water circulation inlet is connected to a water inlet pipe, through which the wastewater source with residual heat is connected; the second water circulation outlet is connected to a water outlet pipe, through which the wastewater after heat exchange is discharged.

[0016] Optionally, the third water circulation inlet is connected to a liquid outlet pipe, which is in communication with the first water circulation outlet; the third water circulation outlet is connected to a liquid inlet pipe, which is in communication with the first water circulation inlet.

[0017] Optionally, it also includes a filter, which is connected between the refrigerant outlet of the second condenser and the refrigerant inlet of the expansion valve through a refrigerant pipe; it also includes a water level gauge, which is arranged in the flash tank and is used to monitor the liquid level in the flash tank in real time; it also includes a cold water replenishment pipe, one end of the cold water replenishment pipe is connected to the flash tank, and the other end of the cold water replenishment pipe is connected to an external cold water source; the third water circulation inlet is connected to a liquid outlet pipe, the liquid outlet pipe is connected to the first water circulation outlet, and the third water circulation outlet is connected to a liquid inlet pipe, and the liquid inlet pipe is connected to the first water circulation inlet.

[0018] In the embodiment of the present application, under the joint action of the compressor, the first condenser, the expansion valve and the evaporator, the waste heat in the wastewater source is used to continuously generate heat at the first condenser, and the saturated steam generated by the flash tank is heated by the first condenser to obtain superheated steam. Compared with the existing related technology of using boilers to generate superheated steam, the waste heat in the wastewater is used to heat the saturated steam in this solution, which realizes energy recovery and utilization, is efficient and energy-saving. The overall structure is simple, ingenious and easy to control, and has high thermal energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0020] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0021] Figure 1 A schematic structural diagram of a superheated steam heat pump system provided in Example 1 of the present application;

[0022] Figure 2 A schematic structural diagram of a superheated steam heat pump system provided in Example 1 of the present application.

[0023] Explanation of the reference numerals in the accompanying drawings: 100, superheated steam heat pump system; 10, flash tank; 101, base; 11, cold water supply pipe; 12, water level gauge; 13, first steam outlet; 14, first water circulation inlet; 15, first water circulation outlet; 111, water inlet pipe; 112, water outlet pipe; 121, liquid inlet pipe; 122, liquid outlet pipe; 20, compressor; 30, first condenser; 301, gas pipeline; 31, steam inlet; 32, second steam outlet; 40, second condenser; 50, filter; 60, expansion valve; 70, evaporator; 71, second water circulation inlet; 72, second water circulation outlet; 80, gas-liquid separator; 90, electromagnetic heater; 91, electromagnetic coil; 92, power supply. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0025] The embodiment of the present application provides a superheated steam heat pump system to solve the technical problems existing in the existing related technologies: the overall structure of the equipment used in the process of preparing superheated steam through a boiler is complex and the thermal energy efficiency is low. The following will be described in conjunction with the accompanying drawings. Embodiment 1

[0026] Reference Figure 1 , Figure 1 A schematic structural diagram of a superheated steam heat pump system provided in an embodiment of the present application. The superheated steam heat pump system 100 in the embodiment of the present application includes a base 101, a flash tank 10, and a compressor 20, a first condenser 30, an expansion valve 60 and an evaporator 70 which are sequentially connected through a refrigerant pipeline, wherein the flash tank 10, the compressor 20, the first condenser 30, the expansion valve 60 and the evaporator 70 are all arranged on the base 101, the flash tank 10 is used to generate saturated steam, and a first steam outlet 13 is arranged on the flash tank 10; a steam inlet 31 and a second steam outlet 32 ​​are arranged on the first condenser 30, and the steam inlet 31 is connected to the first steam outlet 13, and the saturated steam is heated to superheated steam through the first condenser 30, and the superheated steam is transported to the user end through the second steam outlet 32; a second water circulation inlet 71 and a second water circulation outlet 72 are arranged on the evaporator 70, and the second water circulation inlet 71 is connected to a wastewater source with waste heat, and the waste heat in the wastewater source is recovered through the evaporator 70, and the wastewater after heat exchange is discharged through the second water circulation outlet 72. Specifically, a water inlet pipe 111 may be connected to the second water circulation inlet 71 of the evaporator 70, the water inlet pipe 111 is connected to the wastewater source with residual heat, a circulating pump for pumping water is arranged at the water inlet pipe 111, and the wastewater with residual heat is pumped into the evaporator 70 through the water inlet pipe 111 by the circulating pump, so that the wastewater with residual heat is recovered by the evaporator 70; a water outlet pipe 112 may also be connected to the second water circulation outlet 72 of the evaporator 70, and the wastewater after heat exchange is discharged through the water outlet pipe 112. In practice, the wastewater source may also be a waste gas source with residual heat.

[0027] By adopting the above technical solution, under the joint action of the compressor 20, the first condenser 30, the expansion valve 60 and the evaporator 70, the waste heat in the wastewater source is used to continuously generate heat at the first condenser 30, and the saturated steam generated by the flash tank 10 is heated by the first condenser 30, thereby obtaining superheated steam. Compared with the existing related technology of using boilers to generate superheated steam, the waste heat in the wastewater is used as a heat source in this solution, which realizes energy recovery and utilization, is efficient and energy-saving. The overall structure of this solution is simple, ingenious and easy to control, and has high thermal energy efficiency.

[0028] Furthermore, in some embodiments, in order to preheat the water in the flash tank 10 to improve working efficiency, the superheated steam heat pump system 100 also includes a second condenser 40, and the second condenser 40 is connected between the first condenser 30 and the evaporator 70 through a refrigerant pipe. The second condenser 40 is provided with a third water circulation inlet and a third water circulation outlet. The flash tank 10 is provided with a first water circulation inlet 14 and a first water circulation outlet 15. The third water circulation inlet of the second condenser 40 is connected to the first water circulation outlet 15 of the flash tank 10, and the third water circulation outlet of the second condenser 40 is connected to the first water circulation inlet 14 of the flash tank 10, and the solution in the flash tank 10 is heated by the second condenser 40. Specifically, a liquid outlet pipe 122 may be connected to the third water circulation inlet of the second condenser 40, the liquid outlet pipe 122 is in communication with the first water circulation outlet 15 of the flash tank 10, the third water circulation outlet of the flash tank 10 is connected with a liquid inlet pipe 121, the liquid inlet pipe 121 is in communication with the first water circulation inlet 14 of the flash tank 10, a circulating pump for pumping water is provided on the liquid outlet pipe 122, part of the water in the flash tank 10 is pumped into the second condenser 40 through the liquid outlet pipe 122 by the circulating pump, and the water after heat exchange is input into the flash tank 10 through the liquid inlet pipe 121. In this way, the water in the flash tank 10 is preheated by the second condenser 40, which is conducive to improving work efficiency.

[0029] Furthermore, in some embodiments, in order to continuously heat the superheated steam discharged through the second steam outlet 32 ​​on the first condenser 30 to prevent the superheated steam from condensing into water in advance during transportation to the user end, the superheated steam heat pump system 100 further includes an electromagnetic heater 90, which may include an electromagnetic coil 91 and a power supply 92 for heating the electromagnetic coil 91. The second steam outlet 32 ​​is connected to the gas pipeline 301, and the electromagnetic coil 91 is wound around the gas pipeline 301. In this way, when the power supply 92 is turned on, the electromagnetic coil 91 generates heat to continuously heat the superheated steam in the gas pipeline 301, which can prevent the superheated steam from condensing into water in advance during transportation to the user end, and is conducive to extending the transportable distance of the superheated steam.

[0030] Furthermore, in some embodiments, in order to monitor the liquid level in the flash tank 10 in real time and prevent the flash tank 10 from having too little or too much liquid, which may cause safety hazards, the superheated steam heat pump system 100 also includes a water level gauge 12. Specifically, the water level gauge 12 is arranged in the flash tank 10. The water level gauge 12 monitors the liquid level in the flash tank 10 in real time. When the liquid in the flash tank 10 is reduced to the lowest liquid level, the staff can be reminded to replenish the liquid in time, which is conducive to ensuring production safety.

[0031] Among them, in order to facilitate timely replenishment of liquid in the flash tank 10, the superheated steam heat pump system 100 also includes a cold water replenishment pipe 11, one end of the cold water replenishment pipe 11 is connected to the flash tank 10, and the other end of the cold water replenishment pipe 11 is connected to an external cold water source. A circulating pump for pumping water is provided on the cold water replenishment pipe 11. When liquid replenishment is needed, cold water can be pumped into the flash tank 10 through the cold water replenishment pipe 11 by the circulating pump.

[0032] Further, in some embodiments, considering that the liquefied refrigerant (i.e., refrigeration) flowing through the first condenser 30 and the second condenser 40 may contain a lot of impurities, in order to prevent these impurities from causing blockage of the refrigerant pipeline, a filter 50 may be provided. Specifically, the filter 50 is connected between the refrigerant outlet of the second condenser 40 and the refrigerant inlet of the expansion valve 60 through the refrigerant pipeline. In this way, the impurities in the refrigerant pipeline are filtered by the filter 50 to prevent the impurities from causing blockage of the refrigerant pipeline, which is conducive to ensuring the working reliability of the system.

[0033] Furthermore, in some embodiments, a gas-liquid separator 80 may be provided to separate the liquid in the refrigerant flowing through the evaporator 70 for further recycling by the compressor 20. Specifically, the gas-liquid separator 80 is connected between the refrigerant inlet of the compressor 20 and the refrigerant outlet of the evaporator 70 through a refrigerant pipeline.

[0034] Among them, the refrigerant pipelines between the compressor 20, the first condenser 30, the second condenser 40, the filter 50, the expansion valve 60, the evaporator 70 and the gas-liquid separator 80 can be realized by using copper tubes with good structural strength and corrosion resistance.

[0035] In summary, the embodiment of the present application provides an efficient and energy-saving superheated steam heat pump system 100, which has a simple, ingenious and easy-to-control overall structure, high thermal energy efficiency, can effectively prevent superheated steam from condensing into water in advance during transportation to the user end, and can achieve longer distance transportation. Embodiment 2

[0036] In this embodiment, the second condenser 40 is removed, and a heat exchange tube 41 is directly arranged in the flash tank 10. The refrigerant outlet of the first condenser 30 is connected to the refrigerant inlet of the heat exchange tube 41 through a refrigerant pipeline, and the refrigerant outlet of the heat exchange tube 41 is connected to the filter 50 through a refrigerant pipeline. The refrigerant from the compressor 20 passes through the first condenser 30, the heat exchange tube 41, the filter 50, and the expansion valve 60 in sequence and enters the evaporator 70. The contents of other parts are the same as those of the first embodiment.

[0037] The above is a detailed introduction to a superheated steam heat pump system provided in an embodiment of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technicians in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A superheated steam heat pump system, characterized in that: include: A flash tank for generating saturated steam, wherein the flash tank is provided with a first steam outlet; and a compressor, a first condenser, an expansion valve and an evaporator connected through a refrigerant pipeline, wherein: The first condenser is provided with a steam inlet and a second steam outlet, the steam inlet is connected to the first steam outlet, the saturated steam is heated to superheated steam through the first condenser, and the superheated steam escapes from the second steam outlet; The evaporator is provided with a second circulation inlet and a second circulation outlet. The second circulation inlet is connected to a liquid or gas with waste heat. The waste heat in the liquid or gas is recovered through the evaporator, and the liquid or gas after heat exchange is discharged through the second circulation outlet.

2. A superheated steam heat pump system according to claim 1, characterized in that: It also includes a second condenser, which is connected between the first condenser and the evaporator through a refrigerant pipe, and the second condenser is provided with a third water circulation inlet and a third water circulation outlet. The flash tank is provided with a first water circulation inlet and a first water circulation outlet, the third water circulation inlet is connected to the first water circulation outlet, and the third water circulation outlet is connected to the first water circulation inlet.

3. A superheated steam heat pump system according to claim 2, characterized in that: It also includes an electromagnetic heater, which includes an electromagnetic coil. The second steam outlet is connected to a gas pipe, and the electromagnetic coil is arranged around the gas pipe.

4. A superheated steam heat pump system according to claim 3, characterized in that: It also includes a gas-liquid separator, which is connected between the refrigerant inlet of the compressor and the refrigerant outlet of the evaporator through a refrigerant pipeline.

5. The superheated steam heat pump system according to claim 2, characterized in that: The device further comprises a filter, wherein the filter is connected between the refrigerant outlet of the second condenser and the refrigerant inlet of the expansion valve through a refrigerant pipeline.

6. A superheated steam heat pump system according to any one of claims 1 to 5, characterized in that: It also includes a water level meter, which is arranged in the flash tank and is used to monitor the liquid level in the flash tank.

7. A superheated steam heat pump system according to any one of claims 1 to 5, characterized in that: It also includes a cold water replenishment pipeline, one end of which is connected to the flash tank, and the other end of which is connected to an external cold water source.

8. A superheated steam heat pump system according to any one of claims 2 to 5, characterized in that: The third water circulation inlet is connected to a liquid outlet pipe, which is in communication with the first water circulation outlet; the third water circulation outlet is connected to a liquid inlet pipe, which is in communication with the first water circulation inlet.

9. The superheated steam heat pump system according to claim 4, characterized in that: It also includes a filter, which is connected between the refrigerant outlet of the second condenser and the refrigerant inlet of the expansion valve through a refrigerant pipe; it also includes a water level gauge, which is arranged in the flash tank and is used to monitor the liquid level in the flash tank in real time; it also includes a cold water replenishment pipe, one end of which is connected to the flash tank, and the other end of the cold water replenishment pipe is connected to an external cold water source; the third water circulation inlet is connected to a liquid outlet pipe, which is connected to the first water circulation outlet, and the third water circulation outlet is connected to a liquid inlet pipe, which is connected to the first water circulation inlet.

10. The superheated steam heat pump system according to claim 1, characterized in that: It also includes a heat exchange tube arranged in the flash tank, one end of the heat exchange tube is connected to the refrigerant outlet of the first condenser through the refrigerant pipeline, and the other end of the heat exchange tube is connected to the refrigerant inlet of the evaporator through the refrigerant pipeline.

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