Heat energy recycling system for high-temperature waste gas

Abstract

The utility model relates to the technical field of heat energy recovery, in particular to a heat energy recycling system for high-temperature waste gas, which comprises a high-temperature curing oven and heat energy recycling equipment. The upper surface of the high-temperature curing furnace is provided with a natural high-temperature waste gas discharging opening communicated with the high-temperature waste gas collecting chamber, a horizontally-arranged heat exchanger is fixedly installed at the top position in the high-temperature waste gas collecting chamber, and one end of the heat exchanger is fixedly connected with a gas inlet pipe; a high-temperature air feeder is fixedly installed at the end, away from the heat exchanger, of the air inlet pipe. Compared with the prior art, the device has the advantages that the treatment capacity of high-temperature waste gas is reduced and partial use cost of environment-friendly equipment is saved through a waste gas heat energy recycling and reusing technology; and by using the recycled heat energy, the investment and use cost of heating equipment are reduced, and the heat energy utilization rate is increased.

Description

Technical Field

[0001] This utility model relates to the field of heat energy recovery technology, specifically a heat energy recovery and reuse system for high-temperature waste gas. Background Technology

[0002] In some surface treatment fields, equipment is often required to dry or cure coatings on product surfaces at a certain temperature. These units typically have natural exhaust vents to allow the natural discharge of volatile gases generated by heating the coating (which is adhering to the product surface and awaiting curing). These gases are usually quite hot (depending on the design and operating temperature of the heating equipment) and often contain volatile organic compounds (VOCs), primarily benzene, toluene, xylene, particulate matter, and other harmful compounds, posing a significant pollution and hazard to the atmospheric environment and biological health. Therefore, these high-temperature exhaust gases cannot be directly utilized and require treatment to meet regulatory emission standards before being released.

[0003] Faced with such a large volume of high-temperature polluted waste gas, a corresponding waste gas treatment system is needed for unified collection and reprocessing. On the one hand, the treatment of this type of waste gas requires collection through multiple layers of pipelines and a series of filtration and purification processes by multiple purification devices. The collection and treatment of waste gas generates significant energy consumption (the longer the distance of waste gas collection and transportation, the more energy is consumed in the final treatment). On the other hand, the heat carried by the waste gas itself is completely wasted, requiring subsequent cooling measures and insulation during transportation. These circumstances are not only detrimental to optimizing the energy structure but also to the concept of sustainable development. Therefore, developing a heat recovery and reuse system for high-temperature waste gas is an urgent problem that needs to be solved in this field. Utility Model Content

[0004] The purpose of this invention is to provide a system for recovering and reusing the thermal energy of high-temperature waste gas, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature waste gas heat energy recovery and reuse system, comprising a high-temperature curing furnace and a heat energy reuse device. A high-temperature waste gas collection chamber is fixedly installed on the top of the high-temperature curing furnace. A natural high-temperature waste gas outlet connected to the high-temperature waste gas collection chamber is provided on the upper surface of the high-temperature curing furnace. A horizontally arranged heat exchanger is fixedly installed at the top position inside the high-temperature waste gas collection chamber. An air inlet pipe is fixedly connected to one end of the heat exchanger, and a high-temperature blower is fixedly installed at the end of the air inlet pipe away from the heat exchanger. The air outlet of the high-temperature blower is fixedly connected to the top wall of the heat energy reuse device.

[0006] As a preferred technical solution of this utility model, the heat energy recycling equipment is a preheating furnace or a surface drying furnace.

[0007] As a preferred technical solution of this utility model, a return air duct is fixedly installed inside the heat energy recycling equipment, and the horizontal end of the return air duct extends through to the outside of the heat energy recycling equipment and is fixedly connected to a waste heat circulation gas pipeline. The end of the waste heat circulation gas pipeline away from the heat energy recycling equipment is fixedly connected to the heat exchanger, and the fixed connection position between the waste heat circulation gas pipeline and the heat exchanger is located on the side of the heat exchanger away from the air inlet pipe.

[0008] As a preferred technical solution of this utility model, a natural exhaust port is provided at the top of the high-temperature waste gas collection chamber.

[0009] As a preferred technical solution of this utility model, the heat exchanger is a tube sheet heat exchanger.

[0010] As a preferred technical solution of this utility model, a temperature sensor is also fixedly installed inside the thermal energy recycling equipment, and the signal output terminal of the temperature sensor is electrically connected to the high-temperature blower through the control unit.

[0011] As a preferred technical solution of this utility model, the control unit is a DCS control system.

[0012] As a preferred technical solution of this utility model, the number of natural high-temperature exhaust ports is several.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model discloses a high-temperature waste gas heat energy recovery and reuse system. By recovering and reusing the heat energy of the waste gas, the amount of high-temperature waste gas to be treated is reduced, saving some of the operating costs of environmental protection equipment. By using the recovered and reused heat energy, the investment and operating costs of heating equipment are reduced, and the heat energy utilization rate is improved.

[0015] Other features and advantages of this invention will be described in detail in the following specific embodiments. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a top view of the structure of this utility model;

[0018] In the diagram: 1. High-temperature curing oven; 2. High-temperature exhaust gas collection chamber; 3. Natural exhaust high-temperature exhaust gas outlet; 4. Heat exchanger; 5. Inlet pipe; 6. High-temperature blower; 7. Heat energy recycling equipment; 8. Return air pipe; 9. Waste heat circulation gas pipeline; 10. Natural exhaust gas outlet; 11. Temperature sensor. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In the description of this utility model, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] Please see Figure 1-2In this embodiment, a high-temperature waste gas heat energy recovery and reuse system is provided, including a high-temperature curing furnace 1 and a heat energy reuse device 7. A high-temperature waste gas collection chamber 2 is fixedly installed on the top of the high-temperature curing furnace 1. A natural high-temperature waste gas outlet 3 connected to the high-temperature waste gas collection chamber 2 is provided on the upper surface of the high-temperature curing furnace 1. There are several natural high-temperature waste gas outlets 3. A horizontally arranged heat exchanger 4 is fixedly installed at the top position inside the high-temperature waste gas collection chamber 2. The heat exchanger 4 is a tube sheet type heat exchanger. The top of the high-temperature waste gas collection chamber 2 is equipped with a natural exhaust port 10. One end of the heat exchanger 4 is fixedly connected to an air inlet pipe 5, and the end of the air inlet pipe 5 away from the heat exchanger 4 is fixedly installed with a high-temperature blower 6. The outlet of the high-temperature blower 6 is fixedly connected to the top wall of the heat energy recycling equipment 7. The heat energy recycling equipment 7 is a preheating furnace or a surface drying furnace. A return air pipe 8 is fixedly installed inside the heat energy recycling equipment 7, and the horizontal end of the return air pipe 8 extends to the outside of the heat energy recycling equipment 7 and is fixedly connected to a waste heat circulation system. The end of the circulating gas pipeline 9, which is away from the heat energy recycling equipment 7, is fixedly connected to the heat exchanger 4. The fixed connection position of the waste heat circulating gas pipeline 9 and the heat exchanger 4 is located on the side of the heat exchanger 4 away from the inlet pipe 5. During use, the hot waste gas flows from the high-temperature curing oven 1 into the high-temperature waste gas collection chamber 2 through the natural exhaust high-temperature waste gas port 3. After entering the high-temperature waste gas collection chamber 2, the hot air naturally flows upward due to its low specific gravity and gathers in the arrangement area of ​​the tube sheet heat exchanger 4. It can exchange heat energy with the air in the tube sheet heat exchanger 4. The air that has completed the heat exchange in the heat exchanger 4 passes through the inlet pipe 5 and the high-temperature blower 6 and enters the heat energy recycling equipment 7. This can realize the effective recovery and reuse of the heat energy of the waste gas. Furthermore, the residual gas after the heat energy recycling equipment 7 is used can also re-enter the heat exchanger 4 through the return air pipe 8 and the waste heat circulating gas pipeline 9 to continue to exchange heat with the high-temperature waste gas in the high-temperature waste gas collection chamber 2, thus completing the entire process of heat energy reuse.

[0023] In this embodiment, the heat energy recycling system also has a heating capacity adjustment function. A temperature sensor 11 is fixedly installed inside the heat energy recycling device 7, and the signal output terminal of the temperature sensor 11 is electrically connected to the high-temperature blower 6 through the control unit. The control unit is a DCS control system. When the temperature sensor 11 detects that the temperature inside the heat energy recycling device 7 is too low, the DCS control system can reduce the speed of the high-temperature blower 6, thereby slowing down the air circulation speed inside the heat exchanger 4 and increasing its heat exchange time. This can effectively increase the temperature of the air inside the heat exchanger 4 and the air inlet pipe 5, thereby increasing the temperature inside the heat energy recycling device 7. Conversely, the same applies. The amount of heat energy recycled can be adjusted and controlled through the cooperation of the temperature sensor 11 and the high-temperature blower 6.

[0024] It should be noted that the entire high-temperature exhaust gas collection process, apart from the high-temperature blower 6, does not require the participation of any additional energy-consuming devices. It is a heat energy collection method that is fully automated under the physical structure.

[0025] This invention reduces the amount of high-temperature waste gas to be treated and saves some of the operating costs of environmental protection equipment by using waste gas heat energy recovery and reuse technology; by using recovered and reused heat energy, it reduces the investment and operating costs of heating equipment and improves the heat energy utilization rate.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A system for recovering and reusing the thermal energy of high-temperature waste gas, characterized in that, The equipment includes a high-temperature curing oven (1) and a heat energy recycling device (7). A high-temperature waste gas collection chamber (2) is fixedly installed on the top of the high-temperature curing oven (1). A natural high-temperature waste gas outlet (3) connected to the high-temperature waste gas collection chamber (2) is provided on the upper surface of the high-temperature curing oven (1). A horizontally arranged heat exchanger (4) is fixedly installed at the top inside the high-temperature waste gas collection chamber (2). An air inlet pipe (5) is fixedly connected to one end of the heat exchanger (4), and a high-temperature blower (6) is fixedly installed at the end of the air inlet pipe (5) away from the heat exchanger (4). The air outlet of the high-temperature blower (6) is fixedly connected to the top wall of the heat energy recycling device (7).

2. The high-temperature waste gas heat energy recovery and reuse system according to claim 1, characterized in that, The heat energy recycling equipment (7) is a preheating furnace or a surface drying furnace.

3. The high-temperature waste gas heat energy recovery and reuse system according to claim 2, characterized in that, The heat energy recycling equipment (7) is internally fixedly installed with a return air duct (8), and the horizontal end of the return air duct (8) extends to the outside of the heat energy recycling equipment (7) and is fixedly connected to a waste heat circulation gas pipe (9). The end of the waste heat circulation gas pipe (9) away from the heat energy recycling equipment (7) is fixedly connected to the heat exchanger (4), and the fixed connection position between the waste heat circulation gas pipe (9) and the heat exchanger (4) is located on the side of the heat exchanger (4) away from the air inlet pipe (5).

4. The high-temperature waste gas heat energy recovery and reuse system according to claim 1, characterized in that, The top of the high-temperature waste gas collection chamber (2) is provided with a natural exhaust port (10).

5. The high-temperature waste gas heat energy recovery and reuse system according to claim 1, characterized in that, The heat exchanger (4) is a tube sheet heat exchanger.

6. The high-temperature waste gas heat energy recovery and reuse system according to claim 3, characterized in that, The thermal energy recycling device (7) is also equipped with a temperature sensor (11), and the signal output terminal of the temperature sensor (11) is electrically connected to the high-temperature blower (6) through the control unit.

7. A high-temperature waste gas heat energy recovery and reuse system according to claim 6, characterized in that, The control unit is a DCS control system.

8. The high-temperature waste gas heat energy recovery and reuse system according to claim 1, characterized in that, The number of the natural high-temperature exhaust ports (3) is several.

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