A steel structure chimney for flue gas heat energy recovery

Abstract

The present invention relates to the field of flue gas emission devices, specifically a steel structure chimney for recovering flue gas heat energy, comprising a chimney body, an air intake duct provided at the bottom of the chimney body, an air vent provided at the top of the chimney body, a pre-filter provided at the air intake duct, a main filter provided inside the chimney body, the pre-filter using a fiber filter element, the main filter using an activated carbon filter element, an upper heat exchange tube provided on the side of the chimney body, and the upper heat exchange tube located above the main filter, and the design of the upper and lower heat exchange tubes effectively recovers heat energy from the flue gas. The recovered heat energy can be used for other heating needs, such as preheating air, hot water supply, etc., thereby reducing overall energy consumption. The design of the heat-conducting grid, heat-conducting rods and heat-exchange fins increases the heat exchange area and improves the heat energy recovery efficiency. The conical structure of the guide tube slows down the flow rate of the fluid, prolongs the heat exchange time, and further improves the heat exchange efficiency.

Description

Technical Field

[0001] The invention relates to the field of flue gas emission devices, in particular to a steel structure chimney for recovering flue gas heat energy. Background Art

[0002] Industrial production processes generate large amounts of high-temperature flue gas from numerous equipment and processes. This flue gas contains abundant thermal energy, and if discharged directly into the atmosphere, it would not only waste energy but also have a negative impact on the environment. Traditional chimney structures primarily focus on flue gas discharge, while ignoring the potential for heat recovery.

[0003] The existing chimney design has the following problems:

[0004] Heat energy waste:

[0005] Traditional chimneys are only used to discharge flue gas and fail to effectively recover the heat energy contained therein.

[0006] The heat in the flue gas is directly discharged into the atmosphere, resulting in energy waste.

[0007] Environmental pollution:

[0008] High-temperature flue gas contains a large amount of harmful substances, and direct emission will aggravate air pollution.

[0009] Particulate matter and harmful gases in flue gas pose a threat to the surrounding environment and human health.

[0010] Complex structure:

[0011] Some existing heat recovery systems have complex structures and are difficult to install and maintain.

[0012] The equipment occupies a large area, which is not conducive to space optimization of the factory.

[0013] High energy consumption:

[0014] Some heat recovery systems require additional power equipment, increasing energy consumption.

[0015] The maintenance cost is high and the operating efficiency is low.

[0016] Inconvenient operation:

[0017] Traditional chimneys lack intelligent control and require frequent manual parameter adjustments, making operation inconvenient.

[0018] The lack of real-time monitoring and data recording capabilities makes effective management and optimization difficult. Summary of the Invention

[0019] (1) Technical problems solved

[0020] In view of the deficiencies in the prior art, the present invention provides a steel structure chimney for recovering flue gas heat energy.

[0021] (2) Technical solution

[0022] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: A steel structure chimney for recovering flue gas heat energy of the present invention comprises a chimney main body, an air intake pipe is provided at the bottom of the chimney main body, an air vent is provided at the top of the chimney main body, a pre-filter is provided at the air intake pipe, a main filter is provided inside the chimney main body, the pre-filter adopts a fiber filter element, the main filter adopts an activated carbon filter element, an upper heat exchange pipe is provided on the side of the chimney main body, and the upper heat exchange pipe is located above the main filter, a heat conducting grid is provided inside the chimney main body, a plurality of guide grooves are provided on the heat conducting grid, a plurality of heat conducting rods are provided around the top of the heat conducting grid, the ends of the heat conducting rods are fixedly connected to the inner wall of the chimney main body, and pass through the inner wall of the chimney main body to communicate with the upper heat exchange pipe, the upper heat exchange pipe is provided with a water connecting pipe and an air guiding pipe, and the water connecting pipe, the air guiding pipe and the upper heat exchange pipe are all provided with electric valves.

[0023] Preferably, a plurality of heat exchange fins are provided around the bottom of the inner cavity of the chimney body, and a plurality of lower heat exchange tubes are provided around the outer surface of the bottom of the chimney body. The heat exchange fins are connected to the lower heat exchange tubes through heat exchange rods. The lower heat exchange tubes are provided with water connecting pipes and air guiding pipes, and the water connecting pipes, air guiding pipes and heat exchange tubes are provided with electric valves.

[0024] Further preferably, the thermal grid is provided with a plurality of heat exchange holes.

[0025] Again preferably, the heat conducting rod adopts a conical structure, and the top of the heat conducting rod is an arc structure.

[0026] Preferably, a plurality of vertical grooves are provided on both sides of the heat conducting rod.

[0027] Further preferably, the ends of the lower heat exchange tube and the upper heat exchange tube are sheathed with flow guide tubes, the flow guide tubes adopt a conical structure, and the diameter of the input end of the flow guide tube is smaller than the diameter of the output end of the flow guide tube.

[0028] Again preferably, the portion of the heat-conducting rod located in the upper heat exchange tube and the heat-exchange rod both adopt a spiral structure.

[0029] Preferably, the upper heat exchange tube, the lower heat exchange tube and the chimney body are all provided with temperature sensors, the chimney body is also provided with a gas sensor, and the temperature sensor and the gas sensor are both arranged in the upper and lower halves of the chimney body.

[0030] Further preferably, a controller is fixedly mounted on the outer surface of the chimney body, and the controller is electrically connected to the electric valve, the temperature sensor and the gas sensor.

[0031] (3) Beneficial effects

[0032] Compared with the prior art, the present invention provides a steel structure chimney for flue gas heat energy recovery, which has the following beneficial effects:

[0033] Improve energy efficiency:

[0034] Heat recovery: The design of the upper and lower heat exchange tubes effectively recovers heat energy from the flue gas. The recovered heat energy can be used for other heating needs, such as preheating air and supplying hot water, thereby reducing overall energy consumption.

[0035] Efficient heat exchange: The design of the heat grid, heat conducting rods, and heat exchange fins increases the heat exchange area and improves heat recovery efficiency. The tapered structure of the guide tube slows down the flow rate of the fluid, prolongs the heat exchange time, and further improves the heat exchange efficiency.

[0036] Reduce environmental pollution:

[0037] Multi-stage filtration: The pre-filter and main filter use fiber filter elements and activated carbon filter elements respectively, which can effectively remove large particles and harmful substances in the flue gas, ensuring that the discharged flue gas meets environmental protection standards.

[0038] Lowering the emission temperature: Through the heat exchange system, the flue gas is cooled before being discharged, which lowers the emission temperature and reduces the emission of greenhouse gases and other pollutants.

[0039] Simplified equipment structure:

[0040] Compact design: The chimney body has a compact structure and occupies a small area, which is convenient for factory layout and installation.

[0041] Modular design: The main filter and pre-filter are installed with bolt structure, which is convenient for later maintenance and replacement, reducing maintenance costs.

[0042] Energy saving and environmental protection:

[0043] Low energy consumption: Through the efficient heat exchange system, the demand for additional power equipment is reduced, thus lowering energy consumption.

[0044] Resource conservation: Recycled heat energy can replace part of conventional energy, reducing dependence on fossil fuels and meeting modern environmental protection requirements.

[0045] Easy to operate:

[0046] Automatic control: The controller is electrically connected to the electric valve, temperature sensor and gas sensor, and automatically adjusts the flow and direction of the fluid according to real-time data to achieve intelligent management.

[0047] Remote monitoring: The controller supports remote monitoring and data recording, which facilitates the management and optimization of the production process, reduces manual intervention and improves operational convenience.

[0048] Safe and reliable:

[0049] Real-time monitoring: Temperature sensors and gas sensors monitor the temperature and composition of flue gas in real time to ensure safe and stable operation of the system, and provide data support to promptly detect and handle abnormal situations.

[0050] Multiple protections: Electric valves can be quickly closed in an emergency to prevent accidents and ensure the safety of equipment and personnel.

[0051] Highly adaptable:

[0052] Flexible adjustment: The controller can adjust parameters such as the flow rate of cooling water or air at any time to adapt to different working conditions, thereby improving the flexibility and adaptability of the system.

[0053] Multifunctional application: The recovered heat energy can be used for a variety of purposes, such as heating, hot water supply, air preheating, etc., and is suitable for different types of industrial production processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0055] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0056] Figure 3 This is a schematic diagram of the heat-conducting grid and heat-conducting rod structure of the present invention;

[0057] Figure 4 Schematic diagram of the heat exchange fin and heat exchange rod structure of the present invention;

[0058] In the figure: 1. Chimney body; 2. Air intake duct; 3. Pre-filter; 4. Main filter; 5. Upper heat exchange tube; 6. Lower heat exchange tube; 7. Heat conduction grid; 8. Heat conduction rod; 9. Vertical slot; 10. Electric valve; 11. Flow guide pipe; 12. Heat exchange fins; 13. Heat exchange rod; 14. Controller; 15. Water connection pipe; 16. Air guide pipe; 17. Temperature sensor; 18. Gas sensor; 19. Flow guide groove; 20. Heat exchange hole. DETAILED DESCRIPTION

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0060] See also Figure 1-4 The present invention relates to a steel structure chimney for recovering flue gas heat energy, comprising a chimney body 1, an air intake pipe 2 being provided at the bottom of the chimney body 1, an air vent being provided at the top of the chimney body 1, a pre-filter 3 being provided at the air intake pipe 2, a main filter 4 being provided inside the chimney body 1, the pre-filter 3 being a fiber filter element, the main filter 4 being an activated carbon filter element, an upper heat exchange pipe 5 being provided on the side of the chimney body 1, and the upper heat exchange pipe 5 being located above the main filter 4, a heat conducting grid 7 being provided inside the chimney body 1, a plurality of guide grooves 19 being provided on the heat conducting grid 7, a plurality of heat conducting rods 8 being provided around the top of the heat conducting grid 7, the ends of the heat conducting rods 8 being fixedly connected to the inner wall of the chimney body 1, and passing through the inner wall of the chimney body 1 and communicating with the upper heat exchange pipe 5, a water connection pipe 15 and an air guide pipe 16 being provided on the upper heat exchange pipe 5, and an electric valve 10 being provided on the water connection pipe 15, the air guide pipe 16 and the upper heat exchange pipe 5.

[0061] The main structure and technical solutions of the steel chimney for flue gas heat recovery are as follows:

[0062] Chimney body 1

[0063] Function: The chimney body 1 is the main frame of the entire device, used to support and connect various components, and realize flue gas emission and heat energy recovery.

[0064] structure:

[0065] Air intake duct 2: An air intake duct 2 is provided at the bottom of the chimney body 1 for introducing industrial flue gas.

[0066] Air vent: A vent is provided on the top of the chimney body 1 for discharging treated flue gas.

[0067] Pre-filter 3: A pre-filter 3 is provided at the air inlet duct 2, which adopts a fiber filter element and is used for preliminary filtering of large particles in the flue gas.

[0068] Main filter 4: A main filter 4 is provided inside the chimney body 1, which uses an activated carbon filter element to further remove harmful substances in the flue gas.

[0069] Upper heat exchange tube 5: An upper heat exchange tube 5 is provided on the side of the chimney body 1 and is located above the main filter 4 to recover heat energy in the flue gas.

[0070] Heat-conducting grid 7: A heat-conducting grid 7 is provided inside the chimney body 1. A plurality of guide grooves 19 are provided on the heat-conducting grid 7 for evenly distributing the flue gas and improving the heat exchange efficiency.

[0071] Heat-conducting rods 8: A plurality of heat-conducting rods 8 are provided around the top of the heat-conducting grid 7. The ends of the heat-conducting rods 8 are fixedly connected to the inner wall of the chimney body 1 and pass through the inner wall of the chimney body 1 to communicate with the upper heat exchange tube 5.

[0072] Heat exchange fins 12: A plurality of heat exchange fins 12 are provided around the bottom of the inner cavity of the chimney body 1 to increase the heat exchange area.

[0073] Lower heat exchange tubes 6: A plurality of lower heat exchange tubes 6 are provided around the outer surface of the bottom of the chimney body 1 , and the heat exchange fins 12 are connected to the lower heat exchange tubes 6 through heat exchange rods 13 .

[0074] Water receiving pipe 15 and air duct 16: Water receiving pipe 15 and air duct 16 are provided on the upper heat exchange tube 5 and the lower heat exchange tube 6, which are used to introduce cooling water or air for heat exchange. The water receiving pipe 15 can be connected to the water source through a pipeline, and the air duct 16 can be connected to the fan through a pipeline.

[0075] Electric valve 10: Electric valves 10 are provided on the water pipe 15, the air guide pipe 16 and the heat exchange pipe to control the flow rate and direction of the fluid.

[0076] Optimal technical solution

[0077] Heat exchange holes 20: A plurality of heat exchange holes 20 are provided on the heat conducting grid 7 to further improve the heat exchange efficiency.

[0078] Structure of the heat conducting rod 8: The heat conducting rod 8 adopts a conical structure with an arc-shaped top and a plurality of vertical grooves 9 on both sides to increase the surface area and heat conduction efficiency.

[0079] Flow guide tube 11: The ends of the lower heat exchange tube 6 and the upper heat exchange tube 5 are equipped with a flow guide tube 11. The flow guide tube 11 adopts a tapered structure, and the diameter of the input end is smaller than the diameter of the output end to slow down the flow speed of the fluid, thereby increasing the exchange time of the fluid in the upper heat exchange tube 5 and the lower heat exchange tube 6, thereby improving the heat exchange efficiency.

[0080] Spiral structure: The portion of the heat-conducting rod 8 located inside the upper heat exchange tube 5 and the heat exchange rod 13 both adopt a spiral structure, further increasing the heat exchange area.

[0081] Sensors: The upper heat exchange tube 5, the lower heat exchange tube 6 and the chimney body 1 are all provided with temperature sensors 17. The chimney body 1 is also provided with a gas sensor 18 for real-time monitoring of the flue gas temperature and composition.

[0082] Controller 14: A controller 14 is fixedly mounted on the outer surface of the chimney body 1. The controller 14 is electrically connected to the electric valve 10, the temperature sensor 17 and the gas sensor 18 for automatically controlling and monitoring the operating status of the entire system.

[0083] Working principles of each preferred technical solution

[0084] Chimney body 1 design

[0085] Inlet pipe 2 and pre-filter 3: Industrial flue gas enters the chimney body 1 through the air intake pipe 2, and first passes through the pre-filter 3 to remove large particles and reduce wear on subsequent equipment.

[0086] Main filter 4: The flue gas that has passed through the pre-filter 3 continues to rise and passes through the main filter 4 to further remove harmful substances, ensuring that the discharged flue gas meets environmental protection standards.

[0087] The main filter 4 and the pre-filter 3 can be installed on the air intake duct 2 and the chimney body 1 using a bolt structure, which facilitates the later maintenance and replacement of the main filter 4 and the pre-filter 3.

[0088] Heat conducting grid 7 and heat conducting rod 8: The flue gas is evenly distributed through the guide groove 19 on the heat conducting grid 7, and the heat conducting rod 8 transfers the heat in the flue gas to the upper heat exchange tube 5 to realize heat energy recovery.

[0089] Upper heat exchange tube 5: Cooling water or air is introduced into the upper heat exchange tube 5 through the water pipe 15 and the air duct 16, and heat is exchanged with the heat transferred by the heat conducting rod 8. The recovered heat energy can be used for other heating needs.

[0090] Heat exchange fins 12 and lower heat exchange tube 6: The heat exchange fins 12 at the bottom of the chimney body 1 further increase the heat exchange area, transfer heat to the lower heat exchange tube 6 through the heat exchange rods 13, and also perform heat exchange through the water pipe 15 and the air guide pipe 16.

[0091] Heat exchange holes 20: The heat exchange holes 20 on the heat conducting grid 7 increase the contact area between the flue gas and the heat conducting grid 7, thereby improving the heat exchange efficiency.

[0092] Structure of the heat conducting rod 8: The conical structure and the arc-shaped top design reduce the flow resistance of the smoke, and the vertical groove 9 increases the surface area and improves the heat conduction efficiency.

[0093] Flow guide tube 11: The conical structure of the flow guide tube 11 slows down the water flow in the upper heat exchange tube 5 or the lower heat exchange tube 6 and the outflow speed of the air volume, thereby improving the heat exchange efficiency.

[0094] Spiral structure: The spiral structure of the heat conducting rod 8 and the heat exchanging rod 13 increases the heat exchange area and further improves the heat energy recovery efficiency.

[0095] Sensors: Temperature sensor 17 and gas sensor 18 monitor the temperature and composition of the flue gas in real time to ensure safe and stable operation of the system and provide data support.

[0096] Controller 14: The controller 14 automatically adjusts the opening of the electric valve 10 according to the data of the sensor, controls the flow rate and direction of the fluid, and realizes intelligent management.

[0097] Summary of working principles

[0098] Flue gas emissions:

[0099] High-temperature flue gas generated by industrial equipment enters the chimney body 1 through the air intake duct 2.

[0100] The pre-filter 3 performs preliminary filtration on the flue gas to remove large particles.

[0101] The main filter 4 further removes harmful substances in the flue gas to ensure that the discharged flue gas meets environmental protection standards.

[0102] Heat recovery:

[0103] The flue gas is evenly distributed through the guide grooves 19 on the heat-conducting grid 7 , and the heat-conducting rods 8 transfer the heat in the flue gas to the upper heat exchange tubes 5 .

[0104] The upper heat exchange tube 5 introduces cooling water or air through the water connecting pipe 15 and the air guiding pipe 16, and performs heat exchange with the heat transferred by the heat conducting rod 8. The recovered heat energy can be used for other heating needs.

[0105] The heat exchange fins 12 at the bottom of the chimney body 1 further increase the heat exchange area, and transfer heat to the lower heat exchange tube 6 through the heat exchange rod 13, and heat exchange is also carried out through the water pipe 15 and the air guide pipe 16.

[0106] Dynamic Adjustment:

[0107] During use, the controller 14 can be used to control the electric valve 10 to adjust parameters such as the flow rate of cooling water or air at any time to adapt to different working conditions.

[0108] The controller 14 supports remote monitoring and data logging to facilitate management and optimization of the production process.

[0109] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A steel structure chimney for flue gas heat energy recovery, characterized in that: The chimney body (1) comprises a chimney main body (1), an air inlet pipe (2) is provided at the bottom of the chimney main body (1), an air vent is provided at the top of the chimney main body (1), a pre-filter (3) is provided at the air inlet pipe (2), a main filter (4) is provided inside the chimney main body (1), the pre-filter (3) adopts a fiber filter element, the main filter (4) adopts an activated carbon filter element, an upper heat exchange tube (5) is provided on the side of the chimney main body (1), and the upper heat exchange tube (5) is located above the main filter (4), and the chimney main body (1) A heat-conducting grid (7) is provided inside the heat-conducting grid (7), a plurality of flow guide grooves (19) are provided on the heat-conducting grid (7), a plurality of heat-conducting rods (8) are provided around the top of the heat-conducting grid (7), the ends of the heat-conducting rods (8) are fixedly connected to the inner wall of the chimney body (1), and pass through the inner wall of the chimney body (1) and communicate with the upper heat exchange pipe (5), the upper heat exchange pipe (5) is provided with a water connection pipe (15) and an air guide pipe (16), and the water connection pipe (15), the air guide pipe (16) and the upper heat exchange pipe (5) are all provided with electric valves (10); The bottom of the inner cavity of the chimney body (1) is surrounded by a plurality of heat exchange fins (12), and the outer surface of the bottom of the chimney body (1) is surrounded by a plurality of lower heat exchange tubes (6). The heat exchange fins (12) are connected to the lower heat exchange tubes (6) through heat exchange rods (13). The lower heat exchange tubes (6) are provided with water connection pipes (15) and air guide pipes (16), and the water connection pipes (15), air guide pipes (16), upper heat exchange tubes and lower heat exchange tubes are all provided with electric valves (10). The portion of the heat-conducting rod (8) located inside the upper heat exchange tube (5) and the heat exchange rod (13) both adopt a spiral structure.

2. The steel structure chimney for flue gas heat recovery according to claim 1, characterized in that: The heat-conducting grid (7) is provided with a plurality of heat exchange holes (20).

3. The steel structure chimney for flue gas heat recovery according to claim 2, characterized in that: The heat conducting rod (8) adopts a conical structure, and the top of the heat conducting rod (8) is an arc-shaped structure.

4. The steel structure chimney for flue gas heat recovery according to claim 3, characterized in that: A plurality of vertical grooves (9) are provided on both sides of the heat conducting rod (8).

5. The steel structure chimney for flue gas heat recovery according to claim 4, characterized in that: The ends of the lower heat exchange tube (6) and the upper heat exchange tube (5) are provided with a guide tube (11), the guide tube (11) adopts a conical structure, and the diameter of the input end of the guide tube (11) is smaller than the diameter of the output end of the guide tube (11).

6. The steel structure chimney for flue gas heat recovery according to claim 5, characterized in that: The upper heat exchange tube (5), the lower heat exchange tube (6) and the chimney body (1) are all provided with temperature sensors (17), and the chimney body (1) is also provided with a gas sensor (18), and the temperature sensor (17) and the gas sensor (18) are both provided in the upper and lower halves of the chimney body (1).

7. The steel structure chimney for flue gas heat recovery according to claim 6, characterized in that: A controller (14) is fixedly mounted on the outer surface of the chimney body (1), and the controller (14) is electrically connected to the electric valve (10), the temperature sensor (17), and the gas sensor (18).

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