Industrial silicon waste heat boiler exhaust recovery device

Abstract

The utility model discloses an industrial silicon waste heat boiler exhaust recovery device relates to boiler exhaust recovery technical field. The industrial silicon waste heat boiler exhaust recovery device, including first exhaust pipe, install manual door and electric door on the first exhaust pipe, the first exhaust pipe is fixedly connected with second exhaust pipe, install electric regulating door on the second exhaust pipe, one end of second exhaust pipe is fixedly connected with the mother tube, one side of mother tube is fixedly connected with first connecting pipe, first connecting pipe is fixedly connected with first pressure reducing pipe, first pressure reducing pipe is fixedly connected with first pressure reducing valve, first connecting pipe is fixedly installed with steam pipe, steam pipe is fixedly connected with first temperature reducing pipe, first temperature reducing pipe is fixedly installed with first temperature reducer, carry out recovery treatment to the boiler exhaust through multistage pipeline and equipment, make full use of the steam that can possibly directly discharge in the heat exchange of factory area, water preparation heating etc. link, significantly improve energy utilization, reduce energy waste.

Description

Technical Field

[0001] This utility model relates to the field of boiler exhaust recovery technology, and in particular to an industrial silicon waste heat boiler exhaust recovery device. Background Technology

[0002] In the process of industrial silicon production, waste heat boilers generate a large amount of exhaust steam with certain pressure and temperature. The traditional treatment method is to directly discharge it into the air, which not only causes serious energy waste, but also brings environmental problems such as noise pollution. With the advancement of energy conservation and emission reduction policies and enterprises’ emphasis on production cost control, how to effectively recycle and utilize this exhaust steam has become an urgent problem to be solved.

[0003] Traditional steam recovery devices often suffer from simple structures and poor adjustment capabilities, making it difficult to accurately control exhaust steam volume and steam parameters. This results in the recovered steam not being well adapted to the needs of different steam-using equipment. At the same time, some devices lack reliable backup exhaust steam mechanisms, which can easily lead to equipment damage and other safety accidents due to excessively high steam pressure under special operating conditions such as unit malfunctions. In addition, for exhaust steam recovery from multiple boilers, there is a lack of efficient collection and distribution structures, resulting in low recovery efficiency.

[0004] Therefore, there is a need for a device that can achieve precise regulation, safety, reliability, and efficient recovery of exhaust steam from multiple boilers to meet the energy recovery needs in industrial silicon production, reduce energy consumption and production costs, and reduce environmental pollution. Utility Model Content

[0005] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide an industrial silicon waste heat boiler exhaust gas recovery device that can solve the above-mentioned problem.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an industrial silicon waste heat boiler exhaust recovery device, including a first exhaust pipe, on which a manual door and an electric door are installed, the manual door and the electric door are connected in series, the manual door is located upstream, and the electric door is located downstream;

[0007] A second steam pipe is fixedly connected between the manual door and the electric door on the first steam pipe, and an electric regulating door is installed on the second steam pipe;

[0008] The second steam pipe is fixedly connected to a mother pipe at one end. The mother pipe is a seamless steel pipe with four interfaces evenly distributed on its side that connect to the second steam pipe. There are triangular reinforcing ribs at the interfaces.

[0009] A first connecting pipe is fixedly connected to one side of the main pipe, a first pressure reducing pipe is fixedly connected to the first connecting pipe, and a first pressure reducing valve is fixedly connected to the first pressure reducing pipe.

[0010] A steam pipe is fixedly installed on the first connecting pipe, a first desuperheating pipe is fixedly connected to the steam pipe, and a first desuperheater is fixedly installed on the first desuperheating pipe.

[0011] Preferably, the manual door is a gate valve equipped with a circular handwheel, and the electric door is a butterfly valve with an electric actuator mounted on the side.

[0012] Preferably, the second exhaust pipe is a seamless steel pipe with flanges at both ends.

[0013] Preferably, the electric regulating valve is an electronic ball valve with an electric actuator at the top, which is connected to the second row of steam pipe flanges.

[0014] Preferably, one end of the steam pipe is fixedly connected to a turbine auxiliary steam header, which is a horizontal cylindrical body with flat end caps at both ends and a safety valve and pressure gauge interface at the top.

[0015] Preferably, a second connecting pipe is fixedly connected to one side of the turbine auxiliary steam header, a second pressure reducing pipe is fixedly connected to the second connecting pipe, and a second pressure reducing valve is fixedly installed on the second pressure reducing pipe.

[0016] Preferably, a second desuperheating tube is fixedly installed on the second connecting pipe, and a second desuperheater is fixedly installed on the second desuperheating tube.

[0017] Preferably, a third row of steam pipes is fixedly connected to the tail end of the second connecting pipe.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] The industrial silicon waste heat boiler exhaust recovery device recovers and processes boiler exhaust steam through multi-stage pipelines and equipment, making full use of steam that might otherwise be directly discharged for heat exchange, water heating, and other processes in the plant area, significantly improving energy utilization and reducing energy waste. The electric regulating valve can precisely adjust the exhaust steam volume according to system instructions, and with the feedback from pressure and temperature sensors, it ensures a stable steam flow into subsequent processes, guaranteeing the normal operation of all steam-using equipment.

[0020] This industrial silicon waste heat boiler exhaust recovery device is equipped with an electric door as a backup exhaust channel. It automatically opens when the unit malfunctions or the steam turbine fails to meet the recovery requirements, thus preventing excessive steam pressure from damaging the equipment and improving the safety of the device's operation. By aggregating the exhaust steam from multiple boilers through a main pipe, it can adapt to the working conditions of multiple boilers operating simultaneously and can flexibly allocate steam according to the demand, meeting the steam needs of different scenarios.

[0021] The exhaust gas recovery device for this industrial silicon waste heat boiler features compact connections between pipes, valves, and equipment. The layout of the main pipe and connecting pipes ensures a clear steam delivery path, facilitating installation, maintenance, and management, and reducing subsequent operating costs. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] Figure 1 This is a schematic diagram of an industrial silicon waste heat boiler exhaust gas recovery device according to the present invention.

[0024] Figure 2 This is a schematic diagram of an industrial silicon waste heat boiler exhaust gas recovery device according to the present invention.

[0025] Figure 3 This is a cross-sectional schematic diagram of an industrial silicon waste heat boiler exhaust gas recovery device according to the present invention.

[0026] Figure 4 This is a cross-sectional schematic diagram of an industrial silicon waste heat boiler exhaust recovery device according to the present invention.

[0027] Reference numerals in the attached diagram: 1. First exhaust pipe; 2. Manual valve; 3. Electric valve; 4. Second exhaust pipe; 5. Electric regulating valve; 6. Main pipe; 7. First connecting pipe; 8. First pressure reducing pipe; 9. First pressure reducing valve; 10. Steam pipe; 11. First desuperheating pipe; 12. First desuperheater; 13. Steam turbine auxiliary steam header; 14. Second connecting pipe; 15. Second pressure reducing pipe; 16. Second pressure reducing valve; 17. Second desuperheating pipe; 18. Second desuperheater; 19. Third exhaust pipe. Detailed Implementation

[0028] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0030] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Please see Figure 1-4 This utility model provides a technical solution: an exhaust gas recovery device for an industrial silicon waste heat boiler, comprising a first exhaust pipe 1, on which a manual valve 2 and an electric valve 3 are installed. The manual valve 2 is a gate valve with a rectangular valve body and a circular handwheel; the electric valve 3 is a butterfly valve with a cylindrical valve body and an electric actuator mounted on its side. The two are connected in series to the boiler's original exhaust pipe, with the manual valve 2 located upstream and the electric valve 3 located downstream.

[0033] During normal operation, manual door 2 is open and electric door 3 is closed, and boiler exhaust steam enters the recovery system through the pipe between the two. When the unit trips, an accident occurs, or the turbine does not meet the recovery requirements, electric door 3 opens automatically as a backup exhaust channel to discharge steam into the air, thus preventing excessive steam pressure from damaging the equipment.

[0034] A second row of steam pipes 4 is fixedly connected between the manual door 2 and the electric door 3 on the first row of steam pipes 1. An electric regulating door 5 is installed on the second row of steam pipes 4. The second row of steam pipes 4 is a seamless steel pipe with flanges at both ends. The electric regulating door 5 is an electronic ball valve with an electric actuator at the top, which connects to the pipe flange.

[0035] Boiler exhaust steam is led out from the pipe between manual valve 2 and electric valve 3, and transported to electric regulating valve 5 through the second exhaust pipe 4. Electric regulating valve 5 adjusts its opening according to the system's instructions to precisely control the exhaust steam volume and ensure a stable flow of subsequent steam. At the same time, the pressure and temperature sensors before and after it feed back the parameters to provide a basis for regulation.

[0036] The second exhaust pipe 4 is fixedly connected to the main pipe 6 at one end. The main pipe 6 is a seamless steel pipe with four second exhaust pipe 4 interfaces evenly distributed on its side. There are triangular reinforcing ribs at the interfaces. The exhaust steam from the four boilers passes through their respective second exhaust pipes 4 and electric regulating valves 5 and then enters the main pipe 6. The main pipe 6 concentrates and transports the dispersed exhaust steam, and uses its pipe diameter advantage to balance the steam pressure and flow rate, providing a stable steam source for subsequent desuperheating and depressurization treatment.

[0037] A first connecting pipe 7 is fixedly connected to one side of the main pipe 6. A first pressure reducing pipe 8 is fixedly connected to the first connecting pipe 7. A first pressure reducing valve 9 is fixedly connected to the first pressure reducing pipe 8. A steam pipe 10 is fixedly installed on the first connecting pipe 7. A first desuperheating pipe 11 is fixedly connected to the steam pipe 10. A first desuperheater 12 is fixedly installed on the first desuperheating pipe 11. The first pressure reducing valve 9 reduces the steam pressure by adjusting the opening degree. At the same time, the first desuperheater 12 sprays an appropriate amount of cooling water into the steam. The steam temperature is reduced by absorbing heat through the evaporation of water, which meets the requirements for connecting to the existing pipeline.

[0038] One end of the steam pipe 10 is fixedly connected to the turbine auxiliary steam header 13. The turbine auxiliary steam header 13 is a horizontal cylindrical body with flat end caps at both ends and a safety valve and pressure gauge interface at the top. After the steam enters the turbine auxiliary steam header 13, it serves as a centralized distribution hub to supply steam to the plant heat exchange station and chemical water heating system. The pressure inside the header is controlled by the safety valve. When the steam volume exceeds the user's demand, the excess steam is transported to the next stage through the outlet pipeline.

[0039] A second connecting pipe 14 is fixedly connected to one side of the turbine auxiliary steam header 13. A second pressure reducing pipe 15 is fixedly connected to the second connecting pipe 14. A second pressure reducing valve 16 is fixedly installed on the second pressure reducing pipe 15. A second desuperheating pipe 17 is fixedly installed on the second connecting pipe 14. A second desuperheater 18 is fixedly installed on the second desuperheating pipe 17. A third exhaust pipe 19 is fixedly connected to the tail end of the second connecting pipe 14.

[0040] Working principle: During normal operation, manual valve 2 is open and electric valve 3 is closed. Boiler exhaust steam flows through the first exhaust pipe 1 to the space between manual valve 2 and electric valve 3, and then through the second exhaust pipe 4 to the electric regulating valve 5. The electric regulating valve 5 adjusts its opening according to system instructions to precisely control the exhaust steam volume. Pressure and temperature sensors before and after the valve feed parameters back to the system, providing a basis for adjustment and ensuring that the steam flow entering subsequent stages remains stable.

[0041] The exhaust steam from the four boilers flows through their respective second exhaust pipes 4 and electric regulating valves 5, then converges into the main pipe 6. The main pipe 6, leveraging its diameter advantage, balances the steam pressure and flow rate, and delivers the concentrated steam through the first connecting pipe 7 to the first pressure-reducing pipe 8 and the steam pipe 10. The first pressure-reducing valve 9 lowers the steam pressure by adjusting its opening, while the first desuperheater 12 injects a suitable amount of cooling water into the steam through the first desuperheating pipe 11. This cooling water absorbs heat during evaporation, lowering the steam temperature and ensuring that the steam parameters meet the connection requirements.

[0042] The treated steam enters the turbine auxiliary steam header 13 via steam pipe 10. This header serves as a centralized distribution hub, supplying steam to the plant's heat exchange station and chemical water heating system. When the steam volume exceeds user demand, the excess steam is transported through the second connecting pipe 14 to the second pressure reducing pipe 15 and the second desuperheating pipe 17. The second pressure reducing valve 16 adjusts the opening to reduce pressure, and the second desuperheater 18 injects cooling water to reduce temperature. Finally, the steam is discharged and recycled through the third exhaust pipe 19.

[0043] When the unit trips, an accident is being handled, or the turbine does not meet the recovery requirements, the electric door 3 opens automatically, and the steam is discharged into the air through the first exhaust pipe 1 to avoid excessive steam pressure from damaging the equipment.

[0044] By recycling boiler exhaust steam through multi-stage pipelines and equipment, steam that might otherwise be directly discharged can be fully utilized in processes such as heat exchange and water heating in the plant area, significantly improving energy efficiency and reducing energy waste.

[0045] The electric regulating valve 5 can precisely adjust the steam discharge volume according to system instructions. With the feedback from pressure and temperature sensors, it ensures a stable steam flow into subsequent stages and guarantees the normal operation of all steam-using equipment.

[0046] Electric door 3 is set as a backup exhaust channel, which will automatically open when the unit malfunctions or the steam turbine fails to meet the recovery requirements, so as to avoid damage to the equipment due to excessive steam pressure and improve the safety of the unit operation.

[0047] By aggregating the exhaust steam from multiple boilers through the main pipe 6, it can adapt to the working conditions of multiple boilers operating simultaneously, and can flexibly allocate steam according to the demand for steam to meet the steam needs of different scenarios.

[0048] The compact connection of all pipes, valves and equipment, along with the clear steam delivery path of the main pipe 6 and connecting pipes, facilitates installation, maintenance and management, and reduces subsequent operating costs.

[0049] Structural Description:

[0050] The first exhaust pipe 1 is a seamless steel pipe. The pipe diameter is determined according to the specifications of the original exhaust pipe of the boiler, and the length depends on the distance between the boiler and the downstream equipment. Flange interfaces are provided at both ends. As the main exhaust channel of the boiler, it connects the manual door 2 and the electric door 3 in series, providing a flow path for the exhaust steam and a carrier for the installation of the two doors, ensuring that the exhaust steam can be diverted according to the preset path.

[0051] Manual valve 2: This is a gate valve with a rectangular body. The width and height are adapted to the pipe diameter. It is equipped with a circular handwheel on the top and is installed upstream of the first exhaust pipe 1 via a flange. It is open during normal operation to provide a channel for exhaust steam to enter the recovery system; it can be manually closed during maintenance to isolate the system and facilitate subsequent equipment maintenance.

[0052] Electric valve 3: This is a butterfly valve with a cylindrical body whose diameter matches the first exhaust pipe 1. An electric actuator is mounted on its side and installed downstream of the first exhaust pipe 1 via a flange, located behind the manual valve 2. It is closed during normal operation, serving as a backup exhaust passage. When the unit malfunctions or the turbine fails to meet recovery requirements, the electric actuator drives the valve to open, releasing steam into the air to prevent excessive pressure from damaging the equipment.

[0053] The second exhaust pipe 4 is a seamless steel pipe with flanges at both ends. One end is fixedly connected to the first exhaust pipe 1 between the manual door 2 and the electric door 3 via a flange, and the other end is connected to the electric regulating door 5. It is used to lead the exhaust steam between the manual door 2 and the electric door 3 to the recovery system. It is a branch channel for the exhaust steam to enter the subsequent processing stage. The seamless steel pipe material ensures the sealing during the steam transportation process.

[0054] Electric regulating valve 5: This is an electronic ball valve with a cylindrical body and an electric actuator mounted on top. It is connected to the second exhaust pipe 4 via a flange. The valve adjusts its opening according to system commands to precisely control the exhaust steam volume, ensuring a stable steam flow into the main pipe 6. Pressure and temperature sensors installed before and after the valve provide data support for regulation, ensuring stable operation of subsequent processing stages.

[0055] Main pipe 6: A seamless steel pipe with four evenly distributed interfaces on its side connecting to the second exhaust pipe 4. Triangular reinforcing ribs are welded at the interfaces. The second exhaust pipes 4 of the four boilers are respectively connected to the four interfaces, which collect the dispersed exhaust steam and use the larger pipe diameter to balance the steam pressure and flow rate, providing a stable steam source for subsequent desuperheating and pressure reduction treatment. The reinforcing ribs enhance the structural strength at the interfaces and prevent pipe deformation due to steam pressure.

[0056] First connecting pipe 7: is a seamless steel pipe with a diameter compatible with the main pipe 6. One end is fixedly connected to one side of the main pipe 6 via a flange, and the other end is connected to the first pressure reducing pipe 8 and the steam pipe 10 respectively. As a connection channel between the main pipe 6 and the subsequent pressure reducing and desuperheating equipment, it delivers the collected steam to the first pressure reducing valve 9 and the first desuperheater 12 to achieve steam diversion processing.

[0057] First pressure-reducing pipe 8: This is a seamless steel pipe, with one end connected to the first connecting pipe 7 via a flange, and the other end connected to the first pressure-reducing valve 9. It is specifically used to install the first pressure-reducing valve 9, guiding steam to the pressure-reducing valve for pressure regulation, ensuring that the pressure reduction process is completed in an independent pipeline, and avoiding interference with other steam flows.

[0058] First pressure reducing valve 9: This is a piston-type pressure reducing valve with a cylindrical valve body, installed on the first pressure reducing pipe 8 via a flange. It reduces steam pressure by adjusting the opening of the internal piston, ensuring the steam pressure meets the connection requirements of downstream equipment. Its precise pressure regulation capability guarantees the stability of steam parameters.

[0059] Steam pipe 10: This is a seamless steel pipe with the same diameter as the first connecting pipe 7. One end is fixedly connected to the first connecting pipe 7, and the other end is connected to the turbine auxiliary steam header 13. It is connected to the first desuperheating pipe 11 in the middle. It is used to transport steam that has undergone pressure reduction and desuperheating treatment, and to deliver the qualified steam to the turbine auxiliary steam header 13. It is a key channel for steam to enter the distribution stage.

[0060] The first desuperheating pipe 11 is a seamless steel pipe, with one end connected to the steam pipe 10 via a flange and the other end connected to the first desuperheater 12. Cooling water is guided from the first desuperheater 12 into the steam pipe 10, so that the cooling water and steam are fully mixed to achieve the purpose of cooling. Its pipe diameter is designed to meet the requirements of the cooling water delivery flow rate.

[0061] First desuperheater 12: This is a water-spray type desuperheater with a cylindrical body, installed on the first desuperheating pipe 11 via a flange. It injects an appropriate amount of cooling water into the steam, utilizing the heat absorption from water evaporation to lower the steam temperature, ensuring the steam temperature meets the connection requirements. In conjunction with the first pressure reducing valve 9, it achieves precise control of steam parameters.

[0062] Auxiliary steam header 13 for the steam turbine: It is a horizontal cylindrical shell with flat end caps at both ends and a safety valve and pressure gauge interface installed on the top. It is connected to one end of the steam pipe 10 through a flange. As a steam distribution hub, it supplies steam to the plant's heat exchange station and chemical water heating system. The safety valve automatically opens to relieve pressure when the pressure in the header exceeds the limit, and the pressure gauge monitors the pressure in real time to ensure the safe operation of the header.

[0063] The second connecting pipe 14 is a seamless steel pipe. One end is connected to one side of the turbine auxiliary steam header 13 via a flange, and the other end is connected to the third exhaust pipe 19. It connects to the second pressure reducing pipe 15 and the second desuperheater 17 in the middle. It is used to transport excess steam in the turbine auxiliary steam header 13 and guide it to the second pressure reducing valve 16 and the second desuperheater 18 for further processing. It is a channel for the recovery and reuse of excess steam.

[0064] The second pressure-reducing pipe 15 is a seamless steel pipe, with one end connected to the second connecting pipe 14 via a flange, and the other end connected to the second pressure-reducing valve 16. It is specifically designed for the installation of the second pressure-reducing valve 16, guiding excess steam into the valve for pressure regulation to ensure that the steam pressure drops to a level that meets the requirements for subsequent recovery.

[0065] The second pressure-reducing valve 16 has a similar structure to the first pressure-reducing valve 9 and is installed on the second pressure-reducing pipe 15 via a flange. It regulates the pressure of excess steam to meet the recovery parameter requirements of the exhaust steam device, further ensuring the adaptability of steam parameters.

[0066] The second desuperheating pipe 17 is a seamless steel pipe, with one end connected to the second connecting pipe 14 via a flange, and the other end connected to the second desuperheater 18. Cooling water is delivered to the second connecting pipe 14 to cool excess steam, and works in conjunction with the second pressure reducing valve 16 to achieve secondary regulation of steam parameters.

[0067] The second desuperheater 18 is similar in structure to the first desuperheater 12 and is installed on the second desuperheater tube 17. It injects cooling water into the excess steam to reduce the steam temperature and bring it up to the recovery temperature requirement of the exhaust steam device, ensuring that the excess steam can be effectively recovered and utilized.

[0068] The third exhaust pipe 19 is a seamless steel pipe, with one end connected to the tail end of the second connecting pipe 14 via a flange, and the other end connected to the exhaust device. Excess steam after secondary treatment is transported to the exhaust device for recovery, completing the entire process of steam recovery and utilization. Its pipe diameter meets the requirements for transporting large volumes of steam.

[0069] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An industrial silicon waste heat boiler exhaust gas recovery device, comprising a first exhaust pipe (1), characterized in that: The first exhaust pipe (1) is equipped with a manual door (2) and an electric door (3). The manual door (2) and the electric door (3) are connected in series. The manual door (2) is located upstream and the electric door (3) is located downstream. A second steam pipe (4) is fixedly connected between the manual door (2) and the electric door (3) on the first steam pipe (1), and an electric regulating door (5) is installed on the second steam pipe (4). The second steam pipe (4) is fixedly connected to a mother pipe (6) at one end. The mother pipe (6) is a seamless steel pipe with four interfaces evenly distributed on the side that connect to the second steam pipe (4). There are triangular reinforcing ribs at the interfaces. A first connecting pipe (7) is fixedly connected to one side of the main pipe (6), a first pressure reducing pipe (8) is fixedly connected to the first connecting pipe (7), and a first pressure reducing valve (9) is fixedly connected to the first pressure reducing pipe (8). A steam pipe (10) is fixedly installed on the first connecting pipe (7), a first desuperheating pipe (11) is fixedly connected to the steam pipe (10), and a first desuperheater (12) is fixedly installed on the first desuperheating pipe (11).

2. The industrial silicon waste heat boiler exhaust gas recovery device according to claim 1, characterized in that: The manual door (2) is a gate valve equipped with a round handwheel, and the electric door (3) is a butterfly valve with an electric actuator mounted on the side.

3. The industrial silicon waste heat boiler exhaust gas recovery device according to claim 2, characterized in that: The second exhaust pipe (4) is a seamless steel pipe with flanges at both ends.

4. The industrial silicon waste heat boiler exhaust gas recovery device according to claim 3, characterized in that: The electric regulating valve (5) is an electronic ball valve with an electric actuator on top, which is connected to the flange of the second steam pipe (4).

5. The industrial silicon waste heat boiler exhaust gas recovery device according to claim 4, characterized in that: One end of the steam pipe (10) is fixedly connected to the turbine auxiliary steam header (13). The turbine auxiliary steam header (13) is a horizontal cylindrical body with flat end caps at both ends and a safety valve and pressure gauge interface at the top.

6. The industrial silicon waste heat boiler exhaust gas recovery device according to claim 5, characterized in that: A second connecting pipe (14) is fixedly connected to one side of the turbine auxiliary steam header (13), a second pressure reducing pipe (15) is fixedly connected to the second connecting pipe (14), and a second pressure reducing valve (16) is fixedly installed on the second pressure reducing pipe (15).

7. The industrial silicon waste heat boiler exhaust gas recovery device according to claim 6, characterized in that: A second desuperheating tube (17) is fixedly installed on the second connecting pipe (14), and a second desuperheater (18) is fixedly installed on the second desuperheating tube (17).

8. The industrial silicon waste heat boiler exhaust gas recovery device according to claim 7, characterized in that: The tail end of the second connecting pipe (14) is fixedly connected to the third row of steam pipes (19).

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