A vertical bottom combustion hot-air type organic heat carrier boiler

Abstract

The utility model relates to a boiler technical field, concretely is a vertical bottom burn hot -blast type organic heat carrier boiler, including the shell, the inside installation of shell has the pipe coil, the top side of shell is connected with the smoke flue, the outer end of smoke flue is connected with the air preheater, and the outer end of air preheater is installed with the waste heat recovery device, and the bottom of shell is installed with the burner, and the waste heat recovery device includes the recovery channel. In this vertical bottom burn hot -blast type organic heat carrier boiler, the pipe coil design in the shell can increase the contact area of organic heat carrier and combustion heat, improve the heat exchange efficiency; the smoke flue, the air preheater and the waste heat recovery device form a complete waste heat utilization chain, the air preheater can preheat air using flue gas heat, improve the combustion efficiency, the heat exchange water pipe of serpentine arrangement in the waste heat recovery device, further increase the contact area with flue gas, fully recover the flue gas waste heat, effectively reduce the energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, specifically to a vertical bottom-fired hot air type organic heat carrier boiler. Background Technology

[0002] In modern industrial production, industries such as chemical engineering, dyeing and printing, and food processing are increasingly reliant on organic heat carrier boilers, and their demands for efficient and stable heating from these equipment are becoming increasingly stringent. Currently, some common organic heat carrier boilers on the market still suffer from problems such as low thermal efficiency, insufficient waste heat recovery, and weak safety protection, which not only lead to energy waste but also increase enterprise operating costs and safety hazards.

[0003] Patent CN201810783693.4 discloses an organic heat carrier boiler that employs a solid heat storage device, a high-temperature oil pump circulation system, and a hot water circulation system. It replaces organic combustion with off-peak electricity heating as a heat source, achieving a certain degree of economy, efficiency, and environmental friendliness, avoiding pollution from traditional combustion, and effectively utilizing off-peak electricity for heat storage, reducing operating costs and playing a positive role in stabilizing the power grid load. However, this technical solution still has limitations. It relies too heavily on off-peak electricity resources, making it difficult to guarantee stable operation in areas with unstable or scarce power supply. Furthermore, the system structure is relatively complex, resulting in high installation and maintenance costs. In addition, the boiler is insufficient in hot air utilization and the recovery of waste heat from combustion flue gas, failing to fully meet the comprehensive heat energy utilization needs of industrial production. Utility Model Content

[0004] The purpose of this utility model is to provide a vertical bottom-fired hot air type organic heat carrier boiler to solve the problems mentioned in the background art regarding the inadequacy of hot air utilization and the recovery and treatment of waste heat from flue gas after combustion, which cannot fully meet the needs of industrial production for comprehensive utilization of thermal energy.

[0005] To achieve the above objectives, this utility model provides a vertical bottom-fired hot air type organic heat carrier boiler, including an outer shell, a coil installed inside the outer shell, a flue gas duct connected to the top side of the outer shell, an air preheater connected to the outer end of the flue gas duct, a waste heat recovery device installed at the outer end of the air preheater, a burner installed at the bottom of the outer shell, and a recovery channel including a recovery channel. The upper end of the recovery channel is connected to the outlet end of the air preheater through a flue gas inlet, and a flue gas outlet is provided on the lower side of the recovery channel. A hot water exchange pipe is installed inside the recovery channel.

[0006] This system features a burner that ignites at the bottom of the boiler, releasing heat to heat the coils inside the outer shell. The organic heat carrier within the coils is heated, achieving heat transfer. The high-temperature flue gas generated during combustion enters the air preheater through the flue gas duct, where the waste heat of the flue gas preheats the combustion air, improving subsequent combustion efficiency. Subsequently, the flue gas enters the waste heat recovery device, where it exchanges heat with flowing cold water through a serpentine arrangement of hot water pipes within the recovery channel, further recovering the waste heat from the flue gas.

[0007] Preferably, the top of the outer casing is fitted with a top cover, on which a fire extinguishing pipe seat and an explosion-proof door are mounted.

[0008] This feature, with its cover installed on the top of the outer shell, serves to enclose the space at the top of the boiler. The fire extinguishing pipe socket can be connected to an external fire extinguishing device, allowing for timely delivery of extinguishing media to extinguish fires when a fire hazard occurs inside the boiler. The explosion-proof door automatically opens to release pressure when the internal pressure of the boiler rises sharply due to abnormal conditions, preventing excessive internal pressure from causing an explosion.

[0009] Preferably, a nameplate and warning label are installed on the outer wall of the housing.

[0010] This equipment nameplate displays key information such as the boiler's model, specifications, manufacturer, and technical parameters, providing operators and maintenance personnel with basic equipment data. Warning labels use prominent images and text to highlight dangerous behaviors and precautions during boiler operation, such as "High Temperature Danger" and "Strictly Prohibited Operation."

[0011] Preferably, a water inlet pipe seat is installed on the upper outer wall of the housing, and a water outlet pipe seat is installed on the lower outer wall of the housing.

[0012] This feature includes an inlet pipe seat located on the upper outer wall of the casing, used to connect to an external water source and introduce cold water into the system; and an outlet pipe seat located on the lower outer wall of the casing, through which hot water heated by the waste heat recovery device flows out, which can be used in other processes or heating scenarios that require hot water.

[0013] Preferably, a viewing hole is installed at the bottom of the housing near the burner.

[0014] This feature includes a viewing window located at the bottom of the casing near the burner. Operators can directly observe the burner's combustion status, such as flame color, shape, and combustion stability, through the viewing window.

[0015] Preferably, a foundation is installed on the bottom side of the outer casing.

[0016] This feature is installed on the bottom side of the outer casing, providing a stable support base for the boiler, distributing the weight of the boiler evenly to the ground, and resisting external forces such as vibration and wind generated during boiler operation.

[0017] Preferably, a ladder is installed on the outside of the housing.

[0018] This feature includes a ladder installed on the outside of the boiler shell, providing staff with access to the upper part of the boiler and various maintenance areas, making it easier for staff to climb to different heights of the boiler.

[0019] Preferably, the hot water exchange pipes are arranged in a serpentine pattern, with an inlet pipe connected to the upper end of each pipe and an outlet pipe connected to the lower end.

[0020] This system features hot water exchange pipes arranged in a serpentine pattern within the recovery channel, which increases the contact area with the flue gas. Cold water flows into the hot water exchange pipes from the inlet pipe, absorbing residual heat from the flue gas as it flows through the pipes, raising its temperature, and finally flowing out from the outlet pipe.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] In this vertical bottom-fired hot air type organic heat carrier boiler, the coil design inside the outer shell increases the contact area between the organic heat carrier and the combustion heat, improving heat exchange efficiency. The flue gas duct, air preheater, and waste heat recovery device form a complete waste heat utilization chain. The air preheater can use the heat of flue gas to preheat the air, improving combustion efficiency. The serpentine arrangement of the hot water exchange tubes in the waste heat recovery device further increases the contact area with the flue gas, fully recovering the waste heat of the flue gas and effectively reducing energy consumption. Compared with traditional boilers, it can significantly reduce operating costs and improve energy utilization.

[0023] The fire extinguishing pipe holder and explosion-proof door on the top cover form a comprehensive safety protection system. The fire extinguishing pipe holder facilitates rapid firefighting measures in the event of a fire hazard; the explosion-proof door automatically opens to release pressure when the internal pressure of the boiler abnormally increases, preventing explosions and ensuring the safety of equipment and personnel. Meanwhile, the nameplates and warning labels on the outer wall of the casing effectively regulate operator behavior and reduce safety risks caused by human error.

[0024] The observation hole at the bottom of the outer shell allows operators to observe the combustion status of the burner in real time and adjust the combustion parameters in a timely manner; the foundation ensures that the boiler is installed firmly and guarantees operational stability; the external ladder facilitates comprehensive daily maintenance and repair of the boiler by the staff; the reasonable layout of the inlet and outlet pipe seats makes water pipe connection simple, which is conducive to the stable operation of the water circulation system and improves the overall ease of operation and maintenance efficiency of the boiler. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a side view of the present invention.

[0027] Figure 3 This is a schematic diagram of the waste heat recovery device in this utility model;

[0028] The meanings of the labels in the diagram are as follows:

[0029] 1. Fire extinguishing pipe socket; 2. Explosion-proof door; 3. Top cover; 4. Coil; 5. Outer shell; 6. Smoke and air duct; 7. Nameplate; 8. Water inlet pipe socket; 9. Water outlet pipe socket; 10. Warning label; 11. Air preheater; 12. Fire observation hole; 13. Foundation; 14. Burner; 16. Waste heat recovery device; 161. Recovery channel; 162. Smoke outlet; 163. Hot water exchange pipe; 164. Water inlet pipe; 165. Water outlet pipe; 166. Smoke inlet; 17. Escalator. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] This utility model provides a vertical bottom-fired hot air type organic heat carrier boiler, such as Figure 1 , Figure 3 As shown, the device includes a housing 5, with a coil 4 installed inside the housing 5. A flue gas duct 6 is connected to the top side of the housing 5, and an air preheater 11 is connected to the outer end of the flue gas duct 6. A waste heat recovery device 16 is installed at the outer end of the air preheater 11. A burner 14 is installed at the bottom of the housing 5. The waste heat recovery device 16 includes a recovery channel 161. The upper end of the recovery channel 161 is connected to the outlet end of the air preheater 11 through a flue gas inlet 166. A flue gas outlet 162 is provided on the lower side of the recovery channel 161. A hot water exchange pipe 163 is provided inside the recovery channel 161.

[0032] The burner 14 is ignited at the bottom of the boiler, releasing heat to heat the coil 4 inside the outer shell 5. The organic heat carrier inside the coil 4 is heated, achieving heat transfer. The high-temperature flue gas generated by combustion enters the air preheater 11 through the flue gas duct 6, using the waste heat of the flue gas to preheat the combustion air and improve subsequent combustion efficiency. Subsequently, the flue gas enters the waste heat recovery device 16, where it exchanges heat with the cold water flowing inside the serpentine hot water exchange pipes 163 in the recovery channel 161, further recovering the waste heat of the flue gas. This structural design constructs a complete waste heat utilization system. The air preheater 11 improves combustion efficiency and reduces fuel consumption; the waste heat recovery device 16 effectively recovers the waste heat of the originally emitted flue gas, reducing energy waste. Compared with traditional boilers, it significantly improves energy utilization, reduces operating costs, and achieves high efficiency and energy saving. At the same time, the coil 4 is located inside the outer shell 5, increasing the contact area between the organic heat carrier and the combustion heat, strengthening the heat exchange process, and improving the overall heating efficiency.

[0033] In this embodiment, as Figure 1 As shown, the top of the outer casing 5 is equipped with a top cover 3, and a fire extinguishing pipe seat 1 and an explosion-proof door 2 are installed on the top cover 3.

[0034] The top cover 3 is installed on top of the outer shell 5, serving to seal the top space of the boiler. The fire extinguishing pipe seat 1 can be connected to an external fire extinguishing device, allowing for timely delivery of extinguishing media to extinguish fires when a fire hazard occurs inside the boiler. The explosion-proof door 2 automatically opens to release pressure when the internal pressure of the boiler rises sharply due to abnormal conditions, preventing excessive internal pressure from causing an explosion. The fire extinguishing pipe seat 1 and the explosion-proof door 2 together form a comprehensive safety protection system, effectively reducing the possibility of fire and explosion accidents, ensuring the safe operation of the boiler equipment and the safety of surrounding personnel, and greatly improving the safety and reliability of boiler operation.

[0035] Specifically, such as Figure 1 As shown, a nameplate 7 and a warning label 10 are installed on the outer wall of the outer casing 5.

[0036] Nameplate 7 displays key information such as the boiler's model, specifications, manufacturer, and technical parameters, providing operators and maintenance personnel with basic equipment data. Warning label 10 uses prominent graphics and text to highlight dangerous behaviors and precautions during boiler operation, such as high-temperature hazards and prohibitions against unauthorized operation. Nameplate 7 facilitates quick access to equipment information for staff, providing crucial information for operation, maintenance, and equipment selection and replacement. Warning label 10 effectively regulates operator behavior, enhances safety awareness, reduces safety risks caused by human negligence or unauthorized operation, and ensures stable equipment operation.

[0037] Furthermore, such as Figure 2As shown, an inlet pipe seat 8 is installed on the upper outer wall of the outer casing 5, and an outlet pipe seat 9 is installed on the lower outer wall of the outer casing 5.

[0038] The inlet pipe seat 8 is located on the upper outer wall of the outer casing 5 and is used to connect to an external water source to introduce cold water into the system. The outlet pipe seat 9 is located on the lower outer wall of the outer casing 5. Hot water heated by the hot water exchange pipe 163 in the waste heat recovery device 16 flows out through the outlet pipe seat 9 and can be used in other processes or heating scenarios that require hot water. The reasonable layout of the inlet pipe seat 8 and the outlet pipe seat 9 makes the water circulation system easy and smooth to connect, ensures the stable water circulation in the hot water exchange pipe 163 in the waste heat recovery device 16, improves the waste heat recovery efficiency, and also facilitates connection with external hot water use systems to meet the hot water needs of different scenarios.

[0039] Furthermore, such as Figure 1 As shown, a viewing hole 12 is installed at the bottom of the outer casing 5 near the burner 14.

[0040] The observation port 12 is located at the bottom of the outer casing 5 near the burner 14. Operators can directly observe the combustion status of the burner 14 through the observation port 12, such as flame color, shape, and combustion stability. This allows operators to monitor the combustion situation in real time, promptly detect combustion abnormalities such as incomplete combustion or flame deviation, and adjust the operating parameters of the burner 14 accordingly to ensure stable and efficient combustion, improve fuel utilization, and guarantee the boiler's heating effect.

[0041] Furthermore, such as Figure 1 As shown, a foundation 13 is installed on the bottom side of the outer casing 5.

[0042] The foundation 13 is installed on the bottom side of the outer casing 5, providing a stable support base for the boiler, distributing the weight of the boiler evenly on the ground, and resisting external forces such as vibration and wind generated during boiler operation. This ensures the stability of the boiler during installation and operation, prevents safety accidents such as boiler tilting, displacement, or even collapse due to instability of the foundation 13, extends the service life of the boiler, and provides a fundamental guarantee for the safe and stable operation of the boiler.

[0043] Furthermore, such as Figure 1 As shown, an escalator 17 is installed on the outside of the outer casing 5.

[0044] Ladder 17 is installed on the outside of the outer shell 5, providing staff with access to the upper part of the boiler and various maintenance areas, facilitating staff to climb to different heights of the boiler. This greatly facilitates staff in performing daily maintenance, repairs, and equipment component replacements, improving maintenance efficiency, ensuring the safety of staff working at heights, and reducing the difficulties and safety risks associated with maintenance work due to inconvenient access to heights.

[0045] Furthermore, such as Figure 3 As shown, the hot water exchange pipe 163 is arranged in a serpentine pattern. The upper end of the hot water exchange pipe 163 is connected to the inlet pipe 164, and the lower end of the hot water exchange pipe 163 is connected to the outlet pipe 165.

[0046] The heat exchange pipes 163 are arranged in a serpentine pattern inside the recovery channel 161, which increases the contact area with the flue gas. Cold water flows into the heat exchange pipes 163 from the inlet pipe 164. During its flow within the pipes, it absorbs the waste heat from the flue gas in the recovery channel 161, causing its temperature to rise, and finally flows out from the outlet pipe 165. The serpentine arrangement significantly improves the heat exchange efficiency between the heat exchange pipes 163 and the flue gas, allowing the waste heat from the flue gas to be more fully absorbed by the cold water. This improves the overall performance of the waste heat recovery device 16, enhances the boiler's comprehensive energy utilization capacity, and further improves the boiler's energy-saving effect.

[0047] In operation, the vertical bottom-fired hot-air type organic heat carrier boiler of this invention first starts up, with the burner 14 located at the bottom of the outer shell 5 igniting and burning the fuel, releasing a large amount of heat. This heat directly acts on the coil 4 inside the outer shell 5, and the organic heat carrier inside the coil 4 absorbs the heat and its temperature rises. The organic heat carrier, acting as a heat carrier, transfers heat to the process equipment or system requiring heating through its own flow, achieving initial heat transfer and meeting the heating needs of industrial production.

[0048] The high-temperature flue gas generated by fuel combustion is discharged from the flue gas duct 6 on one side of the top of the outer shell 5 and enters the air preheater 11. In the air preheater 11, the flue gas transfers some of its heat to the combustion air, raising the temperature of the combustion air. The preheated combustion air returns to the burner 14 to participate in the combustion process, which can improve the combustion efficiency of the fuel and reduce fuel consumption. After passing through the air preheater 11, the flue gas continues to flow into the recovery channel 161 of the waste heat recovery device 16. The serpentine hot water exchange pipes 163 inside the recovery channel 161 are in full contact with the flue gas. Cold water flows into the hot water exchange pipes 163 from the inlet pipe 164, absorbs the waste heat of the flue gas during the flow in the pipe, and the temperature continuously rises. Finally, it flows out through the outlet pipe 165, realizing the secondary recovery and utilization of the waste heat of the flue gas. After two waste heat recovery processes, the temperature of the flue gas emission is greatly reduced, energy waste is reduced, and the energy utilization rate of the entire boiler system is improved.

[0049] External cold water enters the system through the inlet pipe seat 8 on the upper outer wall of the outer casing 5, flows into the hot water exchange pipe 163 of the waste heat recovery device 16 to absorb the waste heat from the flue gas and be heated. The heated hot water flows out from the outlet pipe seat 9 on the lower outer wall of the outer casing 5 and can be used in other processes or heating scenarios that require hot water, realizing further utilization of waste heat and improving the overall efficiency of the boiler system.

[0050] During boiler operation, the top cover 3 encloses the top space of the outer shell 5, creating a stable operating environment inside. If a fire hazard arises inside the boiler for any reason, the fire extinguishing pipe seat 1 can quickly connect to an external fire extinguishing device to deliver the extinguishing medium into the boiler and extinguish the fire promptly. When the pressure inside the boiler rises sharply due to abnormal combustion, equipment failure, or other reasons, the explosion-proof door 2 will automatically open to release the excessive internal pressure, preventing an explosion and ensuring the safety of equipment and personnel. Simultaneously, the nameplate 7 and warning labels 10 on the outer wall of the outer shell 5 constantly remind operators to operate according to regulations, avoiding safety issues caused by human error.

[0051] Operators can directly observe the flame color, shape, and combustion stability of the burner 14 through the observation hole 12 at the bottom of the outer casing 5 near the burner 14. Based on the observations, they can adjust the operating parameters of the burner 14 in a timely manner to ensure stable and efficient combustion. The foundation 13 provides stable support for the boiler, ensuring that it is not tilted or displaced by external forces such as vibration and wind during operation. In addition, the ladder 17 on the outside of the outer casing 5 allows workers to easily climb to various parts of the boiler for routine inspections, maintenance, and replacement of equipment parts, ensuring that the boiler is always in good operating condition.

[0052] Finally, it should be noted that the electronic components in the air preheater 11 and other components in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A vertical bottom-fired hot air type organic heat carrier boiler, comprising an outer shell (5), characterized in that: The shell (5) is equipped with a coil (4) inside. A flue gas duct (6) is connected to the top side of the shell (5). An air preheater (11) is connected to the outer end of the flue gas duct (6). A waste heat recovery device (16) is installed at the outer end of the air preheater (11). A burner (14) is installed at the bottom of the shell (5). The waste heat recovery device (16) includes a recovery channel (161). The upper end of the recovery channel (161) is connected to the outlet end of the air preheater (11) through a flue gas inlet (166). A flue gas outlet (162) is provided on the lower side of the recovery channel (161). A hot water exchange pipe (163) is provided inside the recovery channel (161).

2. The vertical bottom-fired hot air type organic heat carrier boiler according to claim 1, characterized in that: The top of the outer shell (5) is fitted with a cover (3), and a fire extinguishing pipe seat (1) and an explosion-proof door (2) are fitted on the cover (3).

3. The vertical bottom-fired hot air type organic heat carrier boiler according to claim 1, characterized in that: The outer wall of the housing (5) is fitted with a nameplate (7) and a warning label (10).

4. The vertical bottom-fired hot air type organic heat carrier boiler according to claim 1, characterized in that: The upper outer wall of the outer shell (5) is equipped with a water inlet pipe seat (8), and the lower outer wall of the outer shell (5) is equipped with a water outlet pipe seat (9).

5. The vertical bottom-fired hot air type organic heat carrier boiler according to claim 1, characterized in that: A viewing hole (12) is installed at the bottom of the outer casing (5) near the burner (14).

6. The vertical bottom-fired hot air type organic heat carrier boiler according to claim 1, characterized in that: The bottom side of the outer shell (5) is fitted with a foundation (13).

7. The vertical bottom-fired hot air type organic heat carrier boiler according to claim 1, characterized in that: A ladder (17) is installed on the outside of the outer shell (5).

8. The vertical bottom-fired hot air type organic heat carrier boiler according to claim 1, characterized in that: The hot water exchange pipe (163) is arranged in a serpentine pattern. The upper end of the hot water exchange pipe (163) is connected to the inlet pipe (164), and the lower end of the hot water exchange pipe (163) is connected to the outlet pipe (165).

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