Air source heat pump and steam boiler combined heat supply system

Abstract

An air source heat pump and steam boiler combined heat supply system comprises a water treatment system, an air source heat pump, a deaerator, a steam boiler and an induced draft fan, the water treatment system used for desalting and softening water is connected with the water inlet end of the air source heat pump, and the water outlet end of the air source heat pump is connected with the water inlet end of the steam boiler through the deaerator. The air outlet end of the steam boiler is connected with the air inlet end of the air source heat pump. The heat supply system is simple in structure, convenient to operate, flexible and practical, the air source heat pump is embedded in an existing mature steam boiler heat supply system, the waste heat of the smoke at the tail of the steam boiler is further recycled, the overall heat efficiency of the heat supply system is improved, and the heat supply cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat supply, especially to an air source heat pump and steam boiler combined heat supply system. BACKGROUND

[0002] At present, heat supply technology based on heat pump and heat supply technology based on boiler are very mature, wherein the heat pump does not belong to clean and environmental protection heat source and has very good energy saving benefit, and is mainly used for low grade heat supply (hot water) ; and the boiler can be used for high temperature steam heat supply. But in the field of high temperature steam heat supply, with the continuous rise of energy price, the cost of pure boiler heat supply is gradually rising, and the user's burden of using steam is further increased, and various measures need to be considered to reduce the cost of heat supply.

[0003] Therefore, it is necessary to design an air source heat pump and steam boiler combined heat supply system to overcome the above problems. CONTENT OF THE UTILITY MODEL

[0004] In order to avoid the above problems, an air source heat pump and steam boiler combined heat supply system is provided, which is simple in structure, convenient to operate, flexible and practical. By embedding the air source heat pump in the existing mature steam boiler heat supply system, the waste heat of the tail flue gas of the steam boiler is further recovered, the overall heat efficiency of the heat supply system is improved, and the cost of heat supply is reduced.

[0005] The utility model provides a kind of air source heat pump and steam boiler combined heat supply system, it include: water treatment system, air source heat pump, deaerator, steam boiler and induced draft fan, for the water treatment system of desalted softening water and the water inlet end of air source heat pump are connected, the water outlet end of air source heat pump is connected by deaerator with the water inlet end of steam boiler, the gas outlet end of steam boiler is connected with the gas inlet end of air source heat pump.

[0006] Preferably, the water treatment system is connected with the air source heat pump through a water tank, a deaerating water pump set.

[0007] Preferably, the deaerator is a thermal deaerator, and the heating steam of the deaerator is steam supplied by the steam boiler.

[0008] Preferably, the water outlet end of the deaerator is connected with the water inlet end of the steam boiler through a feed water pump set.

[0009] Preferably, an induced draft fan is arranged between the gas outlet end of the steam boiler and the gas inlet end of the air source heat pump.

[0010] Preferably, the gas outlet end of the steam boiler is provided with environmental protection equipment for dust removal, desulfurization and denitration.

[0011] Preferably, the gas outlet end of the air source heat pump is connected with a chimney.

[0012] Preferably, the air inlet end of the steam boiler is connected with the air supply fan for supplying air into the steam boiler.

[0013] Compared with the prior art, the air source heat pump and steam boiler combined heat supply system has the advantages that the structure is simple, the operation is convenient, the use is flexible, the air source heat pump is embedded in the existing mature steam boiler heat supply system, the waste heat of the tail flue gas of the steam boiler is further recovered, the overall heat efficiency of the heat supply system is improved, and the heat supply cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Fig. 1 is a structural schematic view of an air source heat pump and steam boiler combined heat supply system according to an embodiment of the present application.

[0015] REFERENCE SIGNS:

[0016] 1. water treatment system; 2. water tank; 3. deaerated water pump set; 4. air source heat pump; 5. thermal deaerator; 6. feed water pump set; 7. steam boiler; 8. air supply fan; 9. environmental protection equipment; 10. induced draft fan; 11. chimney. DETAILED DESCRIPTION

[0017] The technical scheme of the present application will be described clearly and completely below in combination with the drawings. In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as a limitation on the present application that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0018] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0019] As shown in Figure 1 Fig. 1, the air source heat pump and steam boiler combined heat supply system provided by the embodiment comprises a water treatment system 1, an air source heat pump 4, a deaerator, a steam boiler 7 and an induced draft fan 10.

[0020] The water treatment system 1 is used for desalination and softening of the water, and the desalination and softening water is heated from the water inlet of the air source heat pump 4; the water treatment system 1 is connected with the air source heat pump 4 through the water tank 2 and the deaerating water pump group 3, that is, the desalination and softening water is temporarily stored in the water tank 2, and then is deaerated by the deaerating water pump group 3 and input into the air source heat pump 4, so that the water is pre-processed, the air source heat pump 4 is better protected, and the service life thereof is improved.

[0021] Meanwhile, the water outlet of the air source heat pump 4 is connected with the water inlet of the steam boiler 7 through the deaerator, the deaerator is a thermal deaerator 5, the heating steam of the deaerator is the steam supplied from the steam boiler 7, or other gas sources, and the water outlet of the deaerator is connected with the water inlet of the steam boiler 7 through the feed water pump group 6. The water is heated by the air source heat pump 4, and then is input into the steam boiler 7 for further heating to generate steam, which is simple and practical, reduces the burden of the steam boiler 7, improves the steam production efficiency, and reduces the heating cost.

[0022] As shown in Figure 1 the air inlet of the steam boiler 7 is connected with the air supply fan 8, which is used for supplying air into the steam boiler 7 to provide the gas required for combustion of the steam boiler 7, and the tail gas and high-temperature flue gas after combustion are discharged from the air outlet of the steam boiler 7.

[0023] Meanwhile, the air inlet of the air source heat pump 4 is provided with an induced draft fan 10, and the air outlet of the steam boiler 7 is provided with an environmental protection equipment 9 for dust removal, desulfurization and denitrification, the high-temperature flue gas from the steam boiler 7 is treated by the environmental protection equipment 9 for dust removal, desulfurization and denitrification, and then is input into the air source heat pump 4 by the induced draft fan 10 to provide a heat source, so that the waste heat of the boiler tail flue gas is further recovered, and the overall thermal efficiency of the heating system is improved.

[0024] Further, the air outlet of the air source heat pump 4 is connected with a chimney 11, the temperature of the flue gas after waste heat recovery is reduced, and then is discharged from the chimney 11, which is high in efficiency and energy saving.

[0025] In the embodiment, the system is divided into two systems according to steam-water and smoke-air:

[0026] The steam-water system process is as follows: the normal-temperature softening water / deionized water processed by the water treatment system 1 is input into the water tank 2, is pressurized by the deaerating water pump group 3, and is then sent to the air source heat pump 4, the water temperature after heating of the air source heat pump 4 is about 50-100℃, the water is input into the deaerator, the water after deaeration of the deaerator is pressurized by the feed water pump group 6, and is then sent to the steam boiler 7, the steam boiler 7 generates steam for external supply, and the whole steam-water system process is completed, wherein the heating steam of the deaerator can be the steam supplied from the steam boiler 7, or other gas sources.

[0027] The flue gas system process is as follows: cold air is pressurized by a fan and sent into the steam boiler 7. Fuel reacts and burns with the cold air in the boiler. The high-temperature flue gas generated by combustion is discharged from the tail of the boiler and enters the environmental protection equipment 9 for dust removal, desulfurization, denitrification and other environmental protection processes to complete the purification process. After purification, the high-temperature flue gas is pressurized by an induced draft fan 10 and sent into the air source heat pump 4. After heat exchange, the low-temperature flue gas is discharged into the chimney 11, completing the entire flue gas system process.

[0028] This system improves the overall thermal efficiency of the heating system by embedding an air source heat pump 4 into the existing mature steam boiler 7 heating system to further recover the waste heat from the flue gas at the tail end of the boiler.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A combined heating system of air source heat pump and steam boiler, characterized in that, include: The system includes a water treatment system, an air source heat pump, a deaerator, a steam boiler, and an induced draft fan. The water treatment system for desalination and softening water is connected to the inlet of the air source heat pump. The outlet of the air source heat pump is connected to the inlet of the steam boiler via the deaerator. The outlet of the steam boiler is connected to the inlet of the air source heat pump.

2. The combined air source heat pump and steam boiler heating system as described in claim 1, characterized in that: The water treatment system is connected to the air source heat pump via a water tank and a deoxygenated water pump set.

3. The combined air source heat pump and steam boiler heating system as described in claim 1, characterized in that: The deaerator is a thermal deaerator, and the heating steam for the deaerator is externally supplied steam from a steam boiler.

4. The combined air source heat pump and steam boiler heating system as described in claim 1, characterized in that: The outlet of the deaerator is connected to the inlet of the steam boiler via a feedwater pump set.

5. The combined air source heat pump and steam boiler heating system as described in claim 1, characterized in that: An induced draft fan is installed between the steam boiler's outlet and the air source heat pump's inlet.

6. The combined air source heat pump and steam boiler heating system as described in claim 1, characterized in that: The steam boiler is equipped with environmental protection equipment for dust removal, desulfurization and denitrification at the steam outlet.

7. The combined air source heat pump and steam boiler heating system as described in claim 1, characterized in that: The air source heat pump's outlet is connected to the chimney.

8. The combined air source heat pump and steam boiler heating system as described in claim 1, characterized in that: The air inlet of the steam boiler is connected to a blower to supply air into the steam boiler.

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