A turbine exhaust heat energy recovery device

Abstract

The utility model relates to a turbine tail gas heat energy recovery device. It solves the existing turbine tail gas heat resource waste and other technical problems. It is arranged at one side of the drying part of the paper machine, and comprises a plurality of turbine units, one end of the turbine unit is provided with a booster assembly and is connected with the turbine exhaust pipeline through the booster assembly, the heat recovery device is arranged on the turbine exhaust pipeline, the turbine exhaust pipeline is connected with the front drying part heat recovery ventilation pipeline through the heat recovery device, the front drying part heat recovery ventilation pipeline is connected with the front drying part gas hood air supply pipeline at one end of the front drying part gas hood body through the heating assembly, and the other end of the front drying part gas hood body is provided with the front drying part gas hood exhaust pipeline connected with the turbine unit. The advantage is that: through the turbine unit, the equipment energy loss can be reduced, and through the heat recovery device, the turbine unit tail gas can be heat recovered, and the air heating cost is reduced. Through the booster assembly, the tail gas can be pressurized, and the tail gas emission effect is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the technical field of turbine heat energy recovery equipment, specifically relating to a turbine exhaust gas heat energy recovery device. Background Technology

[0002] In the modern papermaking industry, the paper machine is a core production piece of equipment, and its energy efficiency directly impacts a company's profitability and competitiveness. Paper machine production includes processes such as pulping, forming, pressing, and drying. The drying process consumes a significant portion of energy, requiring steam to provide heat. The turbine, as a key component of the paper machine's drive system, generates exhaust gas containing heat energy during its operation. Currently, in mainstream paper machine production processes, turbine exhaust gas is mostly directly discharged into the atmosphere through exhaust pipes, without recovering and utilizing the heat energy, leading to a waste of thermal resources and increased production costs. Summary of the Invention

[0003] The purpose of this invention is to address the above-mentioned problems by providing a turbine exhaust gas heat recovery device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A turbine exhaust gas heat recovery device is installed on one side of the paper machine drying section, comprising several turbine units. One end of each turbine unit is equipped with a pressurization component and connected to the turbine exhaust duct via the pressurization component. A heat recovery device is installed on the turbine exhaust duct, and the turbine exhaust duct is connected to the heat recovery ventilation duct of the front drying section via the heat recovery device. The heat recovery ventilation duct of the front drying section is connected to the front drying hood air supply duct at one end of the front drying hood body via a heating component. The other end of the front drying hood body... The system is equipped with a front-drying hood exhaust duct connected to the turbine unit. The exhaust gas is pressurized by a pressurization component to ensure emission efficiency. A heat recovery device recovers heat from the exhaust gas in the turbine exhaust duct, and the recovered heat is used to heat the fresh air in the heat recovery ventilation duct of the front drying section. The heated fresh air is then transferred to the front-drying hood air supply duct for heat exchange and drying of the wet paper sheets, which reduces heating costs. The humid air after heat exchange is also transferred to the turbine unit through the front-drying hood exhaust duct to drive the turbine unit and provide kinetic energy, reducing equipment production costs.

[0005] In the aforementioned turbine exhaust heat recovery device, the turbine unit includes a turbine, one end of which is provided with a turbine output pipe, and the other end of which is provided with a turbine input pipe. The turbine input pipe is connected to the exhaust pipe of the front hood through a separation component. The turbine can reduce energy consumption, and the separation component can separate the moisture in the humid air in the exhaust pipe of the front hood, ensuring the operating stability of the turbine and improving its service life.

[0006] In the aforementioned turbine exhaust heat recovery device, the separation component includes a steam-water separator. One end of the steam-water separator is connected to the exhaust pipe of the front hood, and the other end of the steam-water separator is connected to the turbine input pipe. The steam-water separator can separate the moisture in the humid air inside the exhaust pipe of the front hood, thereby improving its service life.

[0007] In the aforementioned turbine exhaust heat recovery device, the turbine output pipelines of several turbine units are all connected to the turbine output main pipe. The pressurization component is installed in the turbine output main pipe. The turbine output pipelines are connected to the turbine exhaust pipelines. The exhaust gas from multiple turbine exhaust pipelines can be received through the turbine output main pipe, and the pressurization component can ensure the exhaust gas emission effect.

[0008] In the aforementioned turbine exhaust heat recovery device, the pressurization component includes a pressurization fan, which is installed on a pressurization pipeline and connected to the turbine's main output pipe. The pressurization pipeline enables the pressurization fan to be connected to the turbine's main output pipe, and the pressurization fan provides pressure to the exhaust gas, ensuring the exhaust gas emission effect.

[0009] In the aforementioned turbine exhaust heat recovery device, the heat recovery device is a gas-to-gas heat exchanger, with one end of the heat recovery device installed on the turbine exhaust duct and the other end installed on the heat recovery ventilation duct of the front drying section. The heat recovery device can recover heat from the exhaust gas and transfer the heat to the heat recovery ventilation duct of the front drying section to heat the fresh air, thereby reducing heating costs.

[0010] In the aforementioned turbine exhaust heat recovery device, the heating components include a flash steam heater and a fresh air heater. The flash steam heater and the fresh air heater are sequentially installed on the air supply duct of the front dry hood. The flash steam heater can reduce heating energy consumption, and the fresh air heater can ensure the heating effect of fresh air, meet the equipment's air temperature requirements, and ensure heat exchange effect.

[0011] In the aforementioned turbine exhaust gas heat recovery device, the front air hood air supply duct is provided with two air hood air supply branches, which are arranged in parallel. Each air hood air supply branch has an air outlet at one end and an air supply component on each air hood air supply branch. Multi-channel air supply can be carried out through the air hood air supply branches to improve the air supply heat exchange effect, and the air supply components can improve the air supply efficiency.

[0012] In the aforementioned turbine exhaust heat recovery device, the air supply component includes an air supply fan. The air supply fan is installed at the end of the front dryer air hood air supply duct facing the air outlet. The air supply fan can deliver heated fresh air to the paper machine drying section through the air outlet, thereby improving the heat exchange efficiency.

[0013] In the aforementioned turbine exhaust heat recovery device, the exhaust duct of the front dryer is connected in series with the heat recovery ventilation duct of the front drying section, and an exhaust branch is provided on one side of the exhaust duct of the front dryer. The exhaust branch is connected to the steam-water separator, and an exhaust fan is provided on the exhaust branch. Through the exhaust branch, part of the heat-exchanged air can be discharged into the turbine unit, and another part of the air can be transferred to the heat recovery ventilation duct of the front drying section to mix with fresh air to form new heat-exchanged air. The exhaust fan can ensure the discharge efficiency of the heat-exchanged air.

[0014] Compared with existing technologies, the advantages of this utility model are: 1. Turbine units can reduce equipment energy consumption, and heat recovery devices can recover heat from the exhaust gas of turbine units, reducing air heating costs. 2. The supercharging component can pressurize the exhaust gas, ensuring the exhaust emission effect; 3. Using flash steam heaters and fresh air heaters can reduce heating losses and ensure air heating effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the turbine unit in this utility model; Figure 3 This is a schematic diagram of the front air hood body in this utility model.

[0016] In the diagram: Turbine unit 1, turbine 11, turbine output pipeline 12, turbine input pipeline 13, turbine output main pipeline 14, pressurization assembly 2, pressurization fan 21, pressurization pipeline 22, turbine exhaust pipeline 3, heat recovery device 4, heat recovery ventilation pipeline of the front drying section 5, heating assembly 6, flash steam heater 61, fresh air heater 62, front drying hood 7, front drying hood air supply pipeline 71, hood air supply branch 711, air outlet 712, front drying hood exhaust pipeline 72, hood exhaust branch 721, exhaust fan 722, separation assembly 8, steam-water separator 81, air supply assembly 9, air supply fan 91. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1 , Figure 2 , Figure 3 As shown, this turbine exhaust heat recovery device is installed on one side of the paper machine drying section and includes several turbine units 1. One end of each turbine unit 1 is equipped with a pressurization component 2 and is connected to the turbine exhaust duct 3. The turbine exhaust duct 3 is equipped with a heat recovery device 4 and is connected to the front drying section heat recovery ventilation duct 5 through the heat recovery device 4. The front drying section heat recovery ventilation duct 5 is equipped with an axial flow fan capable of absorbing fresh air. The front drying section heat recovery ventilation duct 5 is connected to the front drying hood air supply duct 71 at one end of the front drying hood 7 through a heating component 6. The other end of the front drying hood 7 is connected to the front drying section 1. The exhaust duct 72 of the air hood can pressurize the exhaust gas through the pressurization component 2 to ensure the emission effect. The heat recovery device 4 recovers the heat of the exhaust gas in the turbine exhaust duct 3. After the exhaust gas is heated to below 60°C, it is discharged through the turbine exhaust duct 3. The recovered heat can heat the fresh air in the heat recovery ventilation duct 5 of the front drying section. The heated fresh air is heated by the heating component 6 and then transferred to the front dryer air hood air supply duct 71 to heat exchange and dry the wet paper sheets, which can reduce heating costs. The humid air after heat exchange is transferred to the turbine unit 1 through the front dryer air hood exhaust duct 72 to drive the turbine unit 1 and provide kinetic energy, reducing equipment production costs.

[0019] Specifically, the turbine unit 1 includes a turbine 11. One end of the turbine 11 is provided with a turbine output pipe 12, and the other end of the turbine 11 is provided with a turbine input pipe 13. The turbine input pipe 13 is connected to the exhaust pipe 72 of the front air hood through a separation component 8. The turbine 11 can reduce energy consumption, and the separation component 8 can separate the moisture in the humid air in the exhaust pipe 72 of the front air hood, ensuring the operational stability of the turbine 11 and improving its service life.

[0020] The separation component 8 includes a steam-water separator 81. One end of the steam-water separator 81 is connected to the exhaust pipe 72 of the front air hood, and the other end of the steam-water separator 81 is connected to the turbine input pipe 13. The steam-water separator 81 can separate the moisture in the humid air inside the exhaust pipe 72 of the front air hood, thereby improving its service life.

[0021] like Figure 2 , Figure 3As shown, the turbine output pipes 12 of several turbine units 1 are all connected to the turbine output main pipe 14. The pressurization component 2 is installed in the turbine output main pipe 14. The turbine output pipes 12 are connected to the turbine exhaust pipes 3. The exhaust gas in multiple turbine exhaust pipes 3 can be received through the turbine output main pipe 14, and the pressurization component 2 can ensure the exhaust gas emission effect.

[0022] Furthermore, the pressurization assembly 2 includes a pressurization fan 21, which is installed on the pressurization pipeline 22 and connected to the turbine output main pipe 14. The pressurization pipeline 22 enables the pressurization fan 21 to be connected to the turbine output main pipe 14, and the pressurization fan 21 can provide pressure to the exhaust gas to ensure the exhaust gas emission effect.

[0023] Among them, the heat recovery device 4 is a gas-to-gas heat exchanger, and one end of the heat recovery device 4 is installed on the turbine exhaust pipe 3, and the other end of the heat recovery device 4 is installed on the heat recovery ventilation pipe 5 of the front drying section. The heat recovery device 4 can recover heat from the exhaust gas and transfer the heat to the heat recovery ventilation pipe 5 of the front drying section to heat the fresh air, thereby reducing heating costs.

[0024] Combination Figure 1 , Figure 3 As shown, the heating component 6 includes a flash steam heater 61 and a fresh air heater 62. The flash steam heater 61 and the fresh air heater 62 are sequentially arranged on the air supply duct 71 of the front dry air hood. The flash steam heater 61 can reduce heating energy consumption, and the fresh air heater 62 can ensure the heating effect of fresh air, meet the equipment's requirements for air temperature, and ensure heat exchange effect.

[0025] Among them, the front air hood air supply duct 71 is provided with two air hood air supply branches 711, which are arranged in parallel. One end of the air hood air supply branch 711 is provided with an air outlet 712, and each air hood air supply branch 711 is provided with an air supply component 9. Multi-channel air supply can be carried out through the air hood air supply branch 711 to improve the air supply heat exchange effect, and the air supply component 9 can improve the air supply efficiency.

[0026] Specifically, the air supply assembly 9 includes an air supply fan 91, which is installed at the end of the front dryer air hood air supply duct 71 facing the air outlet 712. The air supply fan 91 can deliver heated fresh air to the paper machine drying section through the air outlet 712 to exchange heat, thereby improving the heat exchange efficiency.

[0027] Combination Figure 2 , Figure 3As shown, the front dryer hood exhaust duct 72 is connected in series with the front drying section heat recovery ventilation duct 5, and a hood exhaust branch 721 is provided on one side of the front dryer hood exhaust duct 72. The hood exhaust branch 721 is connected to the steam-water separator 81, and an exhaust fan 722 is provided on the hood exhaust branch 721. Through the hood exhaust branch 721, part of the heat-exchanged air can be discharged into the turbine unit 1, and the other part of the air can be transferred to the front drying section heat recovery ventilation duct 5 to mix with fresh air to form new heat-exchanged air. The exhaust fan 722 can ensure the exhaust efficiency of the heat-exchanged air.

[0028] The principle of this embodiment is as follows: the air after heat exchange can drive the turbine unit 1 to output kinetic energy, reducing equipment energy consumption. The exhaust gas generated by the operation of the turbine unit 1 recovers heat through the heat recovery device 4 and is then discharged through the turbine exhaust pipe 3. The recovered heat can heat the fresh air in the heat recovery ventilation pipe 5 of the front drying section, which can reduce the air heating cost. The heated fresh air can reach the temperature required by the equipment through the heating component 6, and then the heated air is delivered for heat exchange through the front drying air hood air supply pipe 71 and the air supply component 9.

[0029] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0030] Although this document frequently uses terms such as turbine unit 1, turbine 11, turbine output pipe 12, turbine input pipe 13, turbine output main pipe 14, pressurization assembly 2, pressurization fan 21, pressurization pipe 22, turbine exhaust pipe 3, heat recovery device 4, pre-drying section heat recovery ventilation pipe 5, heating assembly 6, flash steam heater 61, fresh air heater 62, pre-drying hood 7, pre-drying hood air supply pipe 71, hood air supply branch 711, air outlet 712, pre-drying hood exhaust pipe 72, hood exhaust branch 721, exhaust fan 722, separation assembly 8, steam-water separator 81, air supply assembly 9, and air supply fan 91, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A turbine exhaust gas heat recovery device, installed on one side of the paper machine drying section, comprising several turbine units (1), characterized in that, The turbine unit (1) is equipped with a pressurization component (2) at one end and is connected to the turbine exhaust pipe (3) through the pressurization component (2). The turbine exhaust pipe (3) is equipped with a heat recovery device (4) and the turbine exhaust pipe (3) is connected to the front drying section heat recovery ventilation pipe (5) through the heat recovery device (4). The front drying section heat recovery ventilation pipe (5) is connected to the front drying hood air supply pipe (71) at one end of the front drying hood body (7) through a heating component (6). The other end of the front drying hood body (7) is equipped with a front drying hood exhaust pipe (72) connected to the turbine unit (1).

2. The turbine exhaust gas heat recovery device according to claim 1, characterized in that, The turbine unit (1) includes a turbine (11), one end of which is provided with a turbine output pipe (12), and the other end of which is provided with a turbine input pipe (13). The turbine input pipe (13) is connected to the front air hood exhaust pipe (72) through a separation component (8).

3. The turbine exhaust gas heat recovery device according to claim 2, characterized in that, The separation component (8) includes a steam-water separator (81), one end of which is connected to the exhaust pipe (72) of the front air hood, and the other end of which is connected to the turbine input pipe (13).

4. The turbine exhaust gas heat recovery device according to claim 2, characterized in that, The turbine output pipes (12) of several turbine units (1) are all connected to the turbine output main pipe (14). The pressurization component (2) is installed in the turbine output main pipe (14). The turbine output pipes (12) are connected to the turbine exhaust pipes (3).

5. The turbine exhaust gas heat recovery device according to claim 4, characterized in that, The pressurization assembly (2) includes a pressurization fan (21), which is installed on the pressurization pipeline (22) and is connected to the turbine output main pipe (14).

6. The turbine exhaust gas heat recovery device according to claim 1, characterized in that, The heat recovery device (4) is a gas-to-gas heat exchanger, and one end of the heat recovery device (4) is installed on the turbine exhaust pipe (3), and the other end of the heat recovery device (4) is installed on the heat recovery ventilation pipe (5) of the front drying section.

7. The turbine exhaust gas heat recovery device according to claim 1, characterized in that, The heating assembly (6) includes a flash steam heater (61) and a fresh air heater (62), which are sequentially arranged on the front air hood air supply duct (71).

8. The turbine exhaust gas heat recovery device according to claim 1, characterized in that, The front air hood air supply duct (71) is provided with two air hood air supply branches (711), which are arranged in parallel. Each air hood air supply branch (711) has an air outlet (712) at one end and an air supply component (9) on each air hood air supply branch (711).

9. A turbine exhaust gas heat recovery device according to claim 8, characterized in that, The air supply assembly (9) includes an air supply fan (91), which is respectively installed at the end of the front air hood air supply duct (71) facing the air outlet (712).

10. A turbine exhaust gas heat recovery device according to claim 3, characterized in that, The front dryer hood exhaust pipe (72) is connected in series with the front drying section heat recovery ventilation pipe (5), and a hood exhaust branch (721) is provided on one side of the front dryer hood exhaust pipe (72). The hood exhaust branch (721) is connected to the steam-water separator (81), and an exhaust fan (722) is provided on the hood exhaust branch (721).

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