Novel industrial holding furnace with waste heat recovery function

Abstract

The utility model discloses a novel industrial holding furnace with waste heat recovery, which belongs to the field of waste heat recovery and energy conservation and comprises a superhigh-temperature air source heat pump and a control cabinet, the superhigh-temperature air source heat pump is electrically connected with the control cabinet, and a holding furnace is arranged at the outer end of the superhigh-temperature air source heat pump. A heat preservation furnace air outlet pipe, a heat preservation furnace air inlet pipe and a smoke exhaust air pipe are connected between the ultra-high-temperature air source heat pump and the heat preservation furnace, a tail end exhaust pipe is installed at the upper end of the ultra-high-temperature air source heat pump, a steam heat exchanger is installed on the heat preservation furnace air inlet pipe in an embedded mode, and the ultra-high-temperature air source heat pump comprises a heat pump evaporator and a heat pump condenser. The heat emitted by the heat preservation furnace can be recovered on the evaporator side of the ultra-high temperature air source heat pump and used for heating hot air on the condenser side to be used by the waste heat recovery heat preservation furnace, and the problems that the service life of heating equipment is shortened, system pressure is increased, system low-efficiency operation is achieved, and energy consumption is increased due to the fact that the temperature is too high can be solved. And certain energy-saving and emission-reducing effects are achieved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery and energy saving, and more specifically, to a novel industrial heat preservation furnace with waste heat recovery. Background Technology

[0002] The waste heat recovery function of the holding furnace is an energy-saving upgrade to the heat treatment system based on the current energy consumption status of production. It enables the cascade utilization of the heat energy emitted by the furnace and improves the overall thermal efficiency. Addressing the energy waste and large fluctuations in system heat load caused by the direct emission of high-temperature flue gas in traditional processes, a heat exchange device is added to use the waste heat from the flue gas for preheating combustion air or process water, reducing the exhaust gas temperature to a reasonable range. This also avoids thermal shock damage to refractory materials and unstable combustion caused by excessive temperature differences between hot and cold media in the furnace. A closed-loop heat recovery network is constructed using the existing exhaust ducts and control system, which is expected to improve thermal efficiency by 15%-20%. In the domestic market, this technology is particularly suitable for continuous heating furnaces in industries such as building materials, ceramics, and non-ferrous metal processing, playing a significant role in achieving green and low-carbon operation of process furnaces and reducing energy consumption per unit product. After implementing the waste heat recovery upgrade, the reduction in overall system energy consumption will directly translate into optimized production costs and reduced carbon emissions.

[0003] Therefore, this application provides a novel industrial heat preservation furnace with waste heat recovery to solve the problems mentioned in the background art. Summary of the Invention

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a novel industrial heat preservation furnace with waste heat recovery. It can recover the heat emitted by the heat preservation furnace from the evaporator side of an ultra-high temperature air source heat pump and use it to heat the hot air from the condenser side for use in the waste heat recovery heat preservation furnace. This can reduce the shortened lifespan of heating equipment, increased system pressure, inefficient system operation, and increased energy consumption caused by excessively high temperatures. At the same time, the recovered heat can also be used in the heat preservation furnace, which has a certain energy-saving and emission-reduction effect.

[0005] To solve the above problems, this utility model adopts the following technical solution: a novel industrial heat preservation furnace with waste heat recovery, comprising an ultra-high temperature air source heat pump and a control cabinet. The ultra-high temperature air source heat pump is electrically connected to the control cabinet. A heat preservation furnace is provided at the outer end of the ultra-high temperature air source heat pump. A heat preservation furnace outlet pipe, a heat preservation furnace inlet pipe, and a smoke exhaust pipe are connected between the ultra-high temperature air source heat pump and the heat preservation furnace. A terminal exhaust pipe is installed at the upper end of the ultra-high temperature air source heat pump. A steam heat exchanger is embedded in the heat preservation furnace inlet pipe. This allows the heat emitted by the heat preservation furnace to be recovered from the evaporator side of the ultra-high temperature air source heat pump and used to heat the hot air from the condenser side for use in the waste heat recovery heat preservation furnace. This can reduce the shortened lifespan of heating equipment, increased system pressure, inefficient system operation, and increased energy consumption caused by excessively high temperatures. At the same time, the recovered heat can also be used in the heat preservation furnace, which has a certain energy-saving and emission-reduction effect.

[0006] As a further embodiment of this utility model: the ultra-high temperature air source heat pump includes a heat pump evaporator and a heat pump condenser, a compressor is installed between the heat pump evaporator and the heat pump condenser, and an expansion valve, a filter and a liquid storage tank are installed between the heat pump evaporator and the heat pump condenser on the other side.

[0007] As a further improvement of this utility model, temperature sensors are installed on the heat preservation furnace air outlet pipe, heat preservation furnace air inlet pipe, and smoke exhaust pipe.

[0008] As a further improvement of this utility model, valves are installed on both the air outlet pipe and the air inlet pipe of the heat preservation furnace.

[0009] As a further improvement of this utility model, a fan and a filter are installed on both the air outlet pipe and the smoke exhaust pipe of the heat preservation furnace.

[0010] Compared with existing technologies, the advantages of this utility model are:

[0011] 1. This device utilizes the heat dissipated by the insulation furnace on the evaporator side of an ultra-high temperature air source heat pump to heat the hot air on the condenser side for use in the waste heat recovery insulation furnace. This process makes full use of the waste heat that was originally wasted, greatly reducing the dependence on external energy. When the recovered heat is insufficient, steam is introduced through a steam heat exchanger to supplement it. Compared with the traditional insulation furnace system that completely relies on external energy for heating, energy consumption is greatly reduced.

[0012] 2. The device's temperature sensor collects system data in real time, which is then processed by the control cabinet to precisely control the solenoid valve switch, ensuring that the system is always in optimal operating condition. This not only extends the service life of the heating equipment and reduces equipment maintenance and replacement costs, but also improves the stability and reliability of the entire production system, reduces production interruptions caused by equipment failures, and ensures the normal production and operation of the enterprise.

[0013] 3. This device effectively recovers and utilizes the waste heat of the insulation furnace, reducing the consumption of traditional energy and lowering the emission of greenhouse gases such as carbon dioxide. At the same time, due to the more stable and efficient operation of the system, it reduces the emission of pollutants caused by the inefficient operation of the equipment. In addition, compared with traditional gas heating methods, this system does not produce combustion pollutants during operation, making it more environmentally friendly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the ultra-high temperature air source heat pump part of this utility model;

[0016] Explanation of the labels in the diagram:

[0017] 1. Ultra-high temperature air source heat pump; 101. Heat pump evaporator; 102. Heat pump condenser; 103. Compressor; 104. Expansion valve; 105. Filter 1; 106. Liquid storage tank; 2. Valve; 3. Temperature sensor; 4. Insulation furnace exhaust duct; 5. Insulation furnace inlet duct; 6. Insulation furnace; 7. Smoke exhaust duct; 8. Terminal exhaust duct; 9. Control cabinet; 10. Fan; 11. Filter 2; 12. Steam heat exchanger. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example

[0021] Please see Figure 1 A novel industrial heat preservation furnace with waste heat recovery is disclosed, comprising an ultra-high temperature air source heat pump 1 and a control cabinet 9. The ultra-high temperature air source heat pump 1 is electrically connected to the control cabinet 9. A heat preservation furnace 6 is installed at the outer end of the ultra-high temperature air source heat pump 1. A heat preservation furnace outlet pipe 4, a heat preservation furnace inlet pipe 5, and a smoke exhaust pipe 7 are connected between the ultra-high temperature air source heat pump 1 and the heat preservation furnace 6. A terminal exhaust pipe 8 is installed at the upper end of the ultra-high temperature air source heat pump 1. A steam heat exchanger 12 is embedded in the heat preservation furnace inlet pipe 5. The heat can be recovered from the heat preservation furnace by the evaporator side of the ultra-high temperature air source heat pump and used to heat the hot air on the condenser side for use in the waste heat recovery heat preservation furnace. This can reduce the shortened life of heating equipment, increased system pressure, inefficient system operation, and increased energy consumption caused by excessively high temperatures. At the same time, the recovered heat can also be used in the heat preservation furnace, which has a certain energy-saving and emission-reduction effect.

[0022] Please see Figures 1-2 The ultra-high temperature air source heat pump 1 includes a heat pump evaporator 101 and a heat pump condenser 102. A compressor 103 is installed between the heat pump evaporator 101 and the heat pump condenser 102. An expansion valve 104, a filter 105, and a liquid storage tank 106 are installed between the heat pump evaporator 101 and the heat pump condenser 102 on the other side. Temperature sensors 3 are installed on the heat insulation furnace outlet pipe 4, the heat insulation furnace inlet pipe 5, and the exhaust pipe 7. Valves 2 are installed on the heat insulation furnace outlet pipe 4 and the heat insulation furnace inlet pipe 5. Fans 10 and filters 11 are installed on the heat insulation furnace outlet pipe 4 and the exhaust pipe 7.

[0023] Working principle: When this device is working, it recovers the waste heat of the exhaust gas from the heat pump evaporator 101, thereby realizing side heat recovery. Then, high-temperature hot air is generated by the heat pump condenser 102 and sent into the heat pump 6 through the heat pump inlet pipe 5 to heat the heat pump 6. When the heat is insufficient, steam is supplied by the steam heat exchanger 12. The system collects data by the temperature sensor 3, and after processing by the control cabinet 9, it outputs a control signal to control the solenoid valve. Compared with the prior art, this utility model can realize the recovery of heat emitted by the heat pump evaporator side of the ultra-high temperature air source heat pump, which is used to heat the hot air on the condenser side for the waste heat recovery heat pump evaporator. This can reduce the shortened life of heating equipment, increased system pressure, inefficient system operation and increased energy consumption caused by excessive temperature. At the same time, the recovered heat can also be used for the heat pump evaporator, which has a certain energy saving and emission reduction effect.

[0024] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A novel industrial holding furnace with waste heat recovery, comprising an ultra-high temperature air source heat pump (1) and a control cabinet (9), the ultra-high temperature air source heat pump (1) is electrically connected with the control cabinet (9), characterized in that, The ultra-high temperature air source heat pump (1) is provided with a heat preservation furnace (6) at the outer end, the heat preservation furnace (6) is connected with the heat preservation furnace air outlet pipe (4), the heat preservation furnace air inlet pipe (5) and the exhaust air pipe (7), the ultra-high temperature air source heat pump (1) is provided with a terminal exhaust pipe (8) at the upper end, and the steam heat exchanger (12) is embedded and installed on the heat preservation furnace air inlet pipe (5).

2. A novel industrial holding furnace with waste heat recovery as claimed in claim 1, wherein, The ultra-high temperature air source heat pump (1) comprises a heat pump evaporator (101) and a heat pump condenser (102), a compressor (103) is installed between the heat pump evaporator (101) and the heat pump condenser (102), and an expansion valve (104), a filter one (105) and a liquid storage tank (106) are installed between the heat pump evaporator (101) and the heat pump condenser (102) on the other side.

3. A novel industrial holding furnace with waste heat recovery as claimed in claim 1, wherein, Temperature sensors (3) are installed on the heat preservation furnace air outlet pipe (4), the heat preservation furnace air inlet pipe (5) and the exhaust air pipe (7).

4. A novel industrial holding furnace with waste heat recovery as claimed in claim 1, wherein, Valves (2) are installed on the heat preservation furnace air outlet pipe (4) and the heat preservation furnace air inlet pipe (5).

5. A novel industrial holding furnace with waste heat recovery as claimed in claim 1, wherein, Fans (10) and filter two (11) are installed on the heat preservation furnace air outlet pipe (4) and the exhaust air pipe (7).

Images