Isoenthalpy heat recovery system
Through the isenthalpy heat recovery system, the heat pump circulation and air heat exchange module are used to solve the problems of industrial exhaust dehumidification and heat recovery, and the effect of efficient heat energy utilization and energy consumption is achieved.
Patent Information
- Application Number
- CN202410146003.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2025-08-01
AI Technical Summary
The prior art is difficult to efficiently dehumidify industrial exhaust gases and fully recover heat, which has problems such as high energy consumption and large heat loss.
The isenthalpy heat recovery system is adopted, including a heat pump circulation module and an air heat exchange module. The compressor is connected to the forward and reverse pipelines between the inlet and outlet refrigerant carriers, and combined with the primary and secondary heat exchange units, isenthalpy heat recovery of industrial exhaust gas is achieved.
It realizes efficient dehumidification and heat recovery of industrial exhaust, reduces energy consumption, improves heat energy utilization efficiency, reduces emissions, and has small heat energy loss.
Smart Images
Figure CN120403110A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of starch production, and in particular to an isenthalpic heat recovery system for starch exhaust tail gas. Background Art
[0002] Industrial exhaust from drying production processes such as grain processing, feed processing, and fertilizer processing contains a large amount of heat (sensible heat and latent heat) and trace amounts of dust. How to dehumidify the industrial exhaust in an energy-saving and environmentally friendly manner and fully recover and utilize the heat is exactly the problem that the inventors want to solve. Summary of the Invention
[0003] In view of the deficiencies in the prior art, the main purpose of the present invention is to provide an energy-saving and environmentally friendly isenthalpic heat recovery system for dehumidifying industrial exhaust gas and fully recovering and utilizing heat.
[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an isenthalpic heat recovery system, comprising a heat pump circulation module and an air heat exchange module, the heat pump circulation module comprising an inlet refrigeration unit, an outlet refrigeration unit, a compressor and a pipeline, the inlet refrigeration unit and the outlet refrigeration unit both comprising a refrigerant capable of heat exchange with industrial exhaust gas, the pipeline arranged between the inlet refrigeration unit and the outlet refrigeration unit comprising a forward pipeline and a reverse pipeline, the compressor being connected to the inlet refrigeration unit and the outlet refrigeration unit through the forward pipeline; the two ends of the air heat exchange module being respectively connected to the inlet refrigeration unit and the outlet refrigeration unit, the air heat exchange module being provided with an outdoor atmosphere inlet and an outdoor atmosphere outlet, the air heat exchange module further comprising a primary heat exchange unit and a secondary heat exchange unit, the outdoor atmosphere being heat exchanged with the industrial exhaust gas through the primary heat exchange unit, and the heated outdoor atmosphere being heat exchanged with the industrial exhaust gas through the secondary heat exchange unit.
[0005] Preferably, a fan is provided on the air heat exchange module at the outdoor air outlet.
[0006] Preferably, both the forward pipeline and the reverse pipeline are provided with a heat insulation structure.
[0007] Preferably, the refrigerant is R134a.
[0008] The present invention has the following advantages over the prior art. The inlet refrigeration unit is the inlet of industrial exhaust gas, and the outlet refrigeration unit is the outlet of industrial exhaust gas. The inlet refrigeration unit exchanges heat with industrial exhaust gas through a secondary coolant. The inlet refrigeration unit, the outlet refrigeration unit, the compressor and the pipeline form a heat pump cycle system, and the inlet refrigeration unit absorbs the heat energy at the front end of the industrial exhaust gas and transfers it to the outlet refrigeration unit at the back end. Since the thermal efficiency of the heat pump is higher than that of the fuel combustion method, it has the significance of energy conservation and emission reduction. The air heat exchange module is an efficient heat exchange device. First, the primary heat exchange unit uses outdoor air to cool and dehumidify the industrial exhaust gas, and then the secondary heat exchange unit uses the outdoor air that has been heated at this time to heat the cooled industrial exhaust gas. Due to the high thermal efficiency, the heat energy loss is small. Therefore, almost isenthalpic heat recovery of industrial exhaust gas is achieved. The pipeline arranged between the inlet refrigeration unit and the outlet refrigeration unit includes a forward pipeline and a reverse pipeline. The compressor is connected to the inlet refrigeration unit and the outlet refrigeration unit through the forward pipeline. When the industrial exhaust gas is discharged from the outlet refrigeration unit, the heat absorbed from the inlet refrigeration unit is used to heat the industrial exhaust gas to the required discharge temperature, and the remaining heat can be output to other workstations on the production line for reuse. Brief Description of the Drawings
[0009] Figure 1 It is a schematic structural diagram of an isenthalpic heat recovery system of the present invention.
[0010] In the figure: 1. Heat pump cycle module; 2. Air heat exchange module; 3. Inlet refrigeration unit; 4. Outlet refrigeration unit; 5. Compressor; 6. Forward pipeline; 7. Reverse pipeline; 8. Outdoor air inlet; 9. Outdoor air outlet; 10. Primary heat exchange unit; 11. Secondary heat exchange unit; 12. Fan. Detailed Embodiment
[0011] The present invention will be further described below with reference to the accompanying drawings.
[0012] As Figure 1As shown, an isenthalpic heat recovery system includes a heat pump circulation module 1 and an air heat exchange module 2, the heat pump circulation module 1 includes an inlet refrigeration unit 3, an outlet refrigeration unit 4, a compressor 5 and a pipeline, the inlet refrigeration unit 3 and the outlet refrigeration unit 4 both include a refrigerant that can exchange heat with industrial exhaust gas, the pipeline arranged between the inlet refrigeration unit 3 and the outlet refrigeration unit 4 includes a forward pipeline 6 and a reverse pipeline 7, the compressor 5 is connected to the inlet refrigeration unit 3 and the outlet refrigeration unit 4 through the forward pipeline 6; the two ends of the air heat exchange module 2 are respectively connected to the inlet refrigeration unit 3 and the outlet refrigeration unit 4, the air heat exchange module 2 is provided with an outdoor atmosphere inlet 8 and an outdoor atmosphere outlet 9, the air heat exchange module 2 also includes a primary heat exchange unit 10 and a secondary heat exchange unit 11, the outdoor atmosphere exchanges heat with the industrial exhaust gas through the primary heat exchange unit 10, and the heated outdoor atmosphere exchanges heat with the industrial exhaust gas through the secondary heat exchange unit 11.
[0013] This scheme employs an isenthalpic heat recovery system. Its operating principle is as follows: an inlet refrigeration unit 3 serves as the inlet for industrial exhaust gas, while an outlet refrigeration unit 4 serves as the outlet. The inlet refrigeration unit 3 exchanges heat with the industrial exhaust gas via a refrigerant. The inlet refrigeration unit 3, the outlet refrigeration unit 4, the compressor 5, and the piping form a heat pump circulation system. Heat energy from the industrial exhaust gas is absorbed by the inlet refrigeration unit 3 and transferred to the outlet refrigeration unit 4 at the rear end. Because heat pumps have higher thermal efficiency than fuel combustion methods, they offer significant benefits in energy conservation and emission reduction. The air heat exchange module 2 is a highly efficient heat exchange device. The primary heat exchange unit 10 first cools and dehumidifies the industrial exhaust gas using outdoor air. The secondary heat exchange unit 11 then heats the cooled exhaust gas using the now-warmed outdoor air. Due to its high thermal efficiency, heat loss is minimized. This results in nearly isenthalpic heat recovery from the industrial exhaust gas. The pipeline arranged between the inlet refrigeration unit 3 and the outlet refrigeration unit 4 includes a forward pipeline 6 and a reverse pipeline 7. The compressor 5 is connected to the inlet refrigeration unit 3 and the outlet refrigeration unit 4 through the forward pipeline 6. When the industrial waste gas is discharged from the outlet refrigeration unit 4, the heat absorbed from the inlet refrigeration unit 3 is used to heat the industrial waste gas to the required discharge temperature, and the remaining heat can be output to other workstations of the production line for reuse.
[0014] Preferably, a fan 12 is provided on the air heat exchange module 2 at the outdoor air outlet 9. The provision of the fan 12 can improve the circulation efficiency of the outdoor air and speed up the heat exchange speed.
[0015] Preferably, a heat-insulating structure is provided on both the forward pipeline 6 and the reverse pipeline 7. The heat-insulating structure can prevent heat loss as much as possible.
[0016] Preferably, the secondary refrigerant is R134a. The type of the secondary refrigerant includes but is not limited to R134a.
[0017] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present invention should also be regarded as within the protection scope of the present invention.
Claims
1. An isenthalpic heat recovery system, characterized in that: It includes a heat pump cycle module and an air heat exchange module. The heat pump cycle module includes an inlet refrigeration unit, an outlet refrigeration unit, a compressor and pipelines. Both the inlet refrigeration unit and the outlet refrigeration unit include a coolant capable of exchanging heat with industrial exhaust gas. The pipeline between the inlet refrigeration unit and the outlet refrigeration unit includes a forward pipeline and a reverse pipeline. The compressor is connected to the inlet refrigeration unit and the outlet refrigeration unit through the forward pipeline. Both ends of the air heat exchange module are respectively connected to the inlet refrigeration unit and the outlet refrigeration unit. An outdoor atmosphere inlet and an outdoor atmosphere outlet are provided on the air heat exchange module. The air heat exchange module further includes a primary heat exchange unit and a secondary heat exchange unit. The outdoor atmosphere exchanges heat with the industrial exhaust gas through the primary heat exchange unit, and the heated outdoor atmosphere exchanges heat with the industrial exhaust gas through the secondary heat exchange unit.
2. The isenthalpic heat recovery system according to claim 1, wherein: A fan is provided at the outdoor atmosphere outlet on the air heat exchange module.
3. The isenthalpic heat recovery system according to claim 1, wherein: Heat insulation structures are provided on both the forward pipeline and the reverse pipeline.
4. An isenthalpic heat recovery system according to claim 1, wherein: The coolant is R134a.