Steel structure chimney for flue gas heat energy recovery

Abstract

The invention relates to the field of flue gas emission devices, in particular to a steel structure chimney for flue gas heat energy recovery, which comprises a chimney main body, an air inlet pipeline arranged at the bottom of the chimney main body, an air vent arranged at the top of the chimney main body, a pre-filter arranged at the air inlet pipeline, a main filter arranged in the chimney main body, and a fiber filter element adopted by the pre-filter. The main filter adopts an activated carbon filter element, the upper heat exchange pipe is arranged on the side of the chimney body and located above the main filter, and heat energy in smoke is effectively recycled through the design of the upper heat exchange pipe and the lower heat exchange pipe. Recycled heat energy can be used for other heating requirements such as air preheating and hot water supply, so that the overall energy consumption is reduced, the heat exchange area is increased through the design of the heat conduction grids, the heat conduction rods and the heat exchange fins, the heat energy recycling efficiency is improved, the flow speed of fluid is slowed down through the flow guide pipe of the conical structure, and the heat exchange time is prolonged. And the heat exchange efficiency is further improved.

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] In the industrial production process, many equipment and processes will produce a large amount of high-temperature flue gas. These flue gases contain rich heat energy. If they are directly discharged into the atmosphere, it will not only cause energy waste, but also have a negative impact on the environment. The traditional chimney structure mainly focuses on the exhaust function of flue gas, but ignores the heat recovery potential.

[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] The particulate matter and harmful gases in the 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 the 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 operation efficiency is low.

[0016] Inconvenient operation:

[0017] Traditional chimneys lack intelligent control and require frequent manual adjustment of parameters, which is inconvenient to operate.

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

[0019] 1. Technical issues to be resolved

[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] (II) Technical solution

[0022] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a steel structure chimney for flue gas heat energy recovery of the present invention comprises a chimney body, an air intake pipe is provided at the bottom of the chimney body, an air vent is provided at the top of the chimney body, a pre-filter is provided at the air intake pipe, a main filter is provided inside the chimney 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 body, and the upper heat exchange pipe is located above the main filter, a heat conducting grid is provided inside the chimney 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 body, and penetrate the inner wall of the chimney body to communicate with the upper heat exchange pipe, a water connecting pipe and an air guiding pipe are provided on the upper heat exchange pipe, and electric valves are provided on the water connecting pipe, the air guiding pipe and the upper heat exchange pipe.

[0023] Preferably, a plurality of heat exchange fins are arranged around the bottom of the inner cavity of the chimney body, and a plurality of lower heat exchange tubes are arranged around the outer surface of the bottom of the chimney body. The heat exchange fins are connected with 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 conductive grid is provided with a plurality of heat exchange holes.

[0025] Preferably again, the heat conducting rod has a conical structure, and the top of the heat conducting rod has 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 provided with guide tubes, the guide tubes have a conical structure, and the diameter of the input end of the guide tube is smaller than the diameter of the output end of the 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] (III) Beneficial effects

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

[0033] Improve energy efficiency:

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

[0035] Efficient heat exchange: The design of the heat conducting grid, heat conducting rod and heat exchange fins increases the heat exchange area and improves the heat recovery efficiency. The conical structure of the flow guide pipe slows down the flow speed 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 and ensure 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, and reduces 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 and energy consumption is reduced.

[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 to automatically adjust 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 detect and handle abnormal situations in a timely manner.

[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 meet different working conditions, thus improving the flexibility and adaptability of the system.

[0053] Versatile Application: The recovered heat energy can be used for a variety of purposes, such as heating, hot water supply, preheating air, 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 It is a schematic diagram of the structure of the heat conducting grid and the heat conducting rod of the present invention;

[0057] Figure 4 It is a 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 groove; 10. electric valve; 11. flow guide pipe; 12. heat exchange fins; 13. heat exchange rod; 14. controller; 15. water connecting 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 be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0060] See also Figure 1-4 A steel structure chimney for flue gas heat energy recovery of the present invention comprises a chimney body 1, an air intake pipe 2 is arranged at the bottom of the chimney body 1, an air vent is arranged at the top of the chimney body 1, a pre-filter 3 is arranged at the air intake pipe 2, a main filter 4 is arranged inside the chimney body 1, the pre-filter 3 adopts a fiber filter element, and the main filter 4 adopts an activated carbon filter element, an upper heat exchange pipe 5 is arranged on the side of the chimney body 1, and the upper heat exchange pipe 5 is located above the main filter 4, a heat conducting grid 7 is arranged inside the chimney body 1, a plurality of guide grooves 19 are arranged on the heat conducting grid 7, a plurality of heat conducting rods 8 are arranged 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 penetrate the inner wall of the chimney body 1 to communicate with the upper heat exchange pipe 5, a water receiving pipe 15 and an air guiding pipe 16 are arranged on the upper heat exchange pipe 5, and an electric valve 10 is arranged on the water receiving pipe 15, the air guiding 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 at 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, and adopts a fiber filter element to preliminarily filter large particles in the flue gas.

[0068] Main filter 4: A main filter 4 is provided inside the chimney body 1, and an activated carbon filter element is used 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 for recovering heat energy in the flue gas.

[0070] Heat-conducting grid 7: A heat-conducting grid 7 is provided inside the chimney body 1, and 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 arranged 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 penetrate 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 arranged 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 arranged 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 inlet pipe 15 and air duct 16: Water inlet pipe 15 and air duct 16 are provided on the upper heat exchange tube 5 and the lower heat exchange tube 6 for introducing cooling water or air for heat exchange. The water inlet pipe 15 can be connected to a water source through a pipeline, and the air duct 16 can be connected to a fan through a pipeline for use.

[0075] Electric valve 10: Electric valves 10 are arranged on the water receiving pipe 15, the air guiding 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 has a conical structure, an arc-shaped structure at the top, and a plurality of vertical grooves 9 are provided on both sides to increase the surface area and the 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 provided with a flow guide tube 11. The flow guide tube 11 adopts a conical 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 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] Intake duct 2 and pre-filter 3: Industrial flue gas enters the chimney body 1 through the intake duct 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 by using a bolt structure, so as to facilitate the maintenance and replacement of the main filter 4 and the pre-filter 3 at a later stage.

[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: 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.

[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 connecting pipe 15 and the air guide pipe 16.

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

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

[0093] Flow guide tube 11: The conical 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] Sensor: The temperature sensor 17 and the gas sensor 18 monitor the temperature and composition of the flue gas in real time to ensure the 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 principle

[0098] Flue gas emission:

[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 performed through the water receiving pipe 15 and the air guide pipe 16.

[0106] Dynamic Adjustment:

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

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

[0109] Although 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 the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel structure chimney for flue gas heat recovery, characterized in that: The invention comprises a chimney body (1), wherein an air intake pipe (2) is arranged at the bottom of the chimney body (1), an air vent is arranged at the top of the chimney body (1), a pre-filter (3) is arranged at the air intake pipe (2), a main filter (4) is arranged inside the chimney 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 arranged on the side of the chimney body (1), and the upper heat exchange tube (5) is located above the main filter (4), and the chimney body (1) A heat-conducting grid (7) is provided inside the chimney, and 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 penetrate the inner wall of the chimney body (1) to communicate with the upper heat exchange tube (5). The upper heat exchange tube (5) is provided with a water connection pipe (15) and an air guide pipe (16). The water connection pipe (15), the air guide pipe (16) and the upper heat exchange tube (5) are all provided with electric valves (10).

2. The steel structure chimney for flue gas heat recovery according to claim 1 is characterized in that: A plurality of heat exchange fins (12) are arranged around the bottom of the inner cavity of the chimney body (1), and a plurality of lower heat exchange tubes (6) are arranged around the outer surface of the bottom of the chimney body (1). 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) and heat exchange tubes are provided with electric valves (10).

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

4. The steel structure chimney for flue gas heat recovery according to claim 3 is 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.

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

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

7. The steel structure chimney for flue gas heat recovery according to claim 6, characterized in that: The portion of the heat-conducting rod (8) located inside the upper heat-exchange tube (5) and the heat-exchange rod (13) both have a spiral structure.

8. The steel structure chimney for flue gas heat recovery according to claim 7, 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 arranged in the upper and lower halves of the chimney body (1).

9. The steel structure chimney for flue gas heat recovery according to claim 7, 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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