Organic heat carrier furnace with coiled pipe heating surface

Abstract

The utility model relates to the technical field of boilers, in particular to an organic heat carrier furnace with a coiled pipe heating surface, which comprises a furnace body, a first heat exchange cavity and a second heat exchange cavity are arranged in the furnace body, a chain grate stoker is mounted at the bottom of the furnace body, a combustion chamber is arranged on the upper portion of the chain grate stoker, and the first heat exchange cavity is arranged on the top of the combustion chamber. A second heat exchange cavity is formed in one side of the first heat exchange cavity, a smoke exhaust pipe is connected to the outer side of the second heat exchange cavity, a radiation heat exchange pipe is installed in the first heat exchange cavity, and a convection heated pipe is installed in the second heat exchange cavity. According to the organic heat carrier furnace with the coiled pipe heating surface, by optimizing the layout of the heating surface and adopting a heat exchange mode of combining the radiation heat exchange pipe and the convection heating pipe, the heat exchange efficiency and the overall heat efficiency of the boiler are remarkably improved. Due to the arrangement of the multi-return-stroke flue and the smoke deflecting wall, the residence time of smoke in the boiler body is prolonged, heat energy in the smoke is fully released and utilized, the smoke exhaust temperature is effectively reduced, and heat energy loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, and more specifically, to an organic heat carrier furnace with a serpentine tube heating surface. Background Technique

[0002] In the technical field of boilers, as an important heat energy conversion device, the organic heat carrier furnace is widely used in many industries such as chemical industry, textile, printing and dyeing, food, and papermaking.

[0003] Traditional organic heat carrier furnaces often have some deficiencies in design and structure, such as unreasonable layout of the heating surface, low thermal efficiency, high flue gas temperature, incomplete combustion, and inconvenient ash cleaning and slag removal. These problems not only affect the operation efficiency and service life of the boiler, but also may cause environmental pollution. Content of the Utility Model

[0004] The purpose of the utility model is to provide an organic heat carrier furnace with a serpentine tube heating surface to solve the problems in the above-mentioned background technique that traditional organic heat carrier furnaces often have some deficiencies in design and structure, such as unreasonable layout of the heating surface, low thermal efficiency, high flue gas temperature, incomplete combustion, and inconvenient ash cleaning and slag removal.

[0005] To achieve the above purpose, the utility model provides an organic heat carrier furnace with a serpentine tube heating surface, including a furnace body. A first heat exchange chamber and a second heat exchange chamber are arranged inside the furnace body. A chain grate is installed at the bottom of the furnace body. A combustion chamber is arranged above the chain grate. The first heat exchange chamber is arranged at the top of the combustion chamber. A second heat exchange chamber is arranged on one side of the first heat exchange chamber. A smoke exhaust pipe is connected to the outside of the second heat exchange chamber. Radiation heat exchange tubes are installed inside the first heat exchange chamber, and convection heating tubes are installed inside the second heat exchange chamber.

[0006] Preferably, a hopper is installed at the top of one end of the chain grate, and an air inlet is arranged at the other end of the chain grate.

[0007] Preferably, a smoke baffle wall is arranged inside the second heat exchange chamber.

[0008] Preferably, a slag collecting tank is arranged at the bottom of the second heat exchange chamber, and a cleaning port is arranged on one side of the slag collecting tank.

[0009] Preferably, the radiation heat exchange tubes include an inner coil, a middle coil, and an outer coil. A first return flue is formed between the inner coil and the middle coil. A second return flue is formed between the middle coil and the outer coil. A third return flue is formed between the outer coil and the inner wall of the first heat exchange chamber. The inner coil, the middle coil, and the outer coil are sequentially connected, and medium inlets and outlets are arranged at both ends.

[0010] Preferably, the convective heating tube has a serpentine structure, and medium inlets and outlets are provided at both ends.

[0011] Preferably, a front arch is provided at one end of the combustion chamber, and a rear arch is provided at the other end.

[0012] Preferably, a heat insulation layer is provided on the outer wall of the furnace body.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] In the organic heat carrier furnace with a serpentine tube heating surface, by optimizing the layout of the heating surface and adopting a heat exchange method combining radiant heat exchange tubes and convective heating tubes, especially the convective heating tubes having an efficient serpentine structure, the heat exchange efficiency and the overall thermal efficiency of the boiler are significantly improved. At the same time, with a reasonable flue design, including the setting of multi-pass flues and baffle walls, the residence time of the flue gas in the furnace body is prolonged, the heat energy in the flue gas is fully released and utilized, the flue gas discharge temperature is effectively reduced, and the heat energy loss is reduced.

[0015] In addition, the boiler of the present utility model is also provided with a slag collecting tank and a cleaning port, which facilitates the ash and slag cleaning operation of the boiler, keeps the heating surface clean, and further improves the operation efficiency and stability of the boiler. The design of the chain grate, in cooperation with the hopper and the air tuyere, realizes the continuous and stable combustion of the fuel and improves the combustion efficiency.

[0016] The heat insulation layer provided on the outer wall of the furnace body not only reduces the heat dissipation, improves the heat insulation performance of the boiler, but also reduces the energy consumption during the operation of the boiler, meeting the requirements of modern industrial production for high efficiency, environmental protection, and energy conservation. Description of the Drawings

[0017] Figure 1 is the overall structural schematic diagram of the present utility model;

[0018] Figure 2 of the present utility model Figure 1 is the partial enlarged schematic diagram of A-A in;

[0019] Figure 3 of the present utility model Figure 1 is the partial enlarged schematic diagram of B-B in;

[0020] Figure 4 of the present utility model Figure 1 is the partial enlarged schematic diagram of C-C in;

[0021] The meanings of the various reference numerals in the drawings are as follows:

[0022] 1. Furnace body; 11. First heat exchange chamber; 12. Second heat exchange chamber; 121. Baffle wall; 13. Exhaust pipe; 14. Slag collection tank; 141. Cleaning port; 2. Radiant heat exchange tube; 21. Inner coil; 22. Middle coil; 23. Outer coil; 3. Convection heating tube; 4. Chain grate; 41. Hopper; 42. Air inlet; 5. Combustion chamber; 51. Front arch; 52. Rear arch. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] The present invention provides an organic heat carrier furnace with a serpentine tube heating surface, as Figures 1-4 shown, which includes a furnace body 1. A first heat exchange chamber 11 and a second heat exchange chamber 12 are arranged inside the furnace body 1. A chain grate 4 is installed at the bottom of the furnace body 1. A combustion chamber 5 is arranged above the chain grate 4. The first heat exchange chamber 11 is arranged at the top of the combustion chamber 5. The second heat exchange chamber 12 is arranged on one side of the first heat exchange chamber 11. An exhaust pipe 13 is connected to the outside of the second heat exchange chamber 12. A radiant heat exchange tube 2 is installed inside the first heat exchange chamber 11. A convection heating tube 3 is installed inside the second heat exchange chamber 12. Through a clever structural design, efficient and stable heat energy conversion is achieved. The first heat exchange chamber 11 and the second heat exchange chamber 12 arranged inside the furnace body 1 respectively undertake different heat exchange tasks, optimizing the heat exchange process. The chain grate 4 installed at the bottom ensures continuous and uniform supply of fuel, providing a stable combustion environment for the combustion chamber 5.

[0025] The combustion chamber 5 is located above the chain grate 4, and its top is directly connected to the first heat exchange chamber 11. Such a layout enables the high-temperature flue gas generated by combustion to directly enter the first heat exchange chamber 11 and conduct sufficient heat exchange with the radiant heat exchange tube 2, improving the utilization rate of heat energy. The second heat exchange chamber 12 arranged on one side of the first heat exchange chamber 11 further recovers the remaining heat energy in the flue gas through the convection heating tube 3, ensuring the full release and utilization of heat energy.

[0026] In particular, the convection heating tube 3 adopts a serpentine structure, increasing the contact area and residence time between the flue gas and the heating tube, and improving the heat exchange efficiency. At the same time, the exhaust pipe 13 connected to the outside of the second heat exchange chamber 12 discharges the flue gas that has undergone sufficient heat exchange from the furnace body, ensuring the stable operation of the boiler and a low exhaust gas temperature.

[0027] In this embodiment, a hopper 41 is installed at the top of one end of the chain grate 4, and an air inlet 42 is provided at the other end of the chain grate 4 to control the air intake of the chain grate 4.

[0028] Specifically, a baffle wall 121 is arranged inside the second heat exchange chamber 12 to increase the flow path of the flue gas and facilitate the full heat exchange of the flue gas.

[0029] Furthermore, a slag collection tank 14 is arranged at the bottom of the second heat exchange chamber 12, and a cleaning port 141 is arranged on one side of the slag collection tank 14 to facilitate the cleaning of impurities.

[0030] Furthermore, the radiation heat exchange tube 2 includes an inner coil 21, a middle coil 22 and an outer coil 23. A first return flue is formed between the inner coil 21 and the middle coil 22, a second return flue is formed between the middle coil 22 and the outer coil 23, and a third return flue is formed between the outer coil 23 and the inner wall of the first heat exchange chamber 11. The inner coil 21, the middle coil 22 and the outer coil 23 are connected in sequence, and medium inlets and outlets are arranged at both ends to facilitate increasing the flow path of the flue gas and improving the heat exchange efficiency.

[0031] Furthermore, the convective heating tube 3 is of a serpentine structure, and medium inlets and outlets are arranged at both ends to facilitate the inlet and outlet of the medium.

[0032] Furthermore, a front arch 51 is arranged at one end of the combustion chamber 5, and a rear arch 52 is arranged at the other end to provide a space for fuel combustion.

[0033] Furthermore, a heat insulation layer is arranged on the outer wall of the furnace body 1. The heat insulation layer is made of asbestos material to achieve a certain heat insulation effect.

[0034] When the organic heat carrier furnace with a serpentine tube heating surface of the present utility model is in use, first, the fuel is continuously and evenly fed onto the chain grate 4 through the hopper 41, and the chain grate 4 brings the fuel into the combustion chamber 5 for combustion. During the combustion process, the air inlet 42 provides necessary air intake for the chain grate 4 to ensure the full combustion of the fuel.

[0035] The high-temperature flue gas generated by combustion then enters the first heat exchange chamber 11 and undergoes full heat exchange with the radiation heat exchange tube 2. The radiation heat exchange tube 2 includes an inner coil 21, a middle coil 22 and an outer coil 23. Multiple return flues are formed between them, increasing the flow path and residence time of the flue gas, thereby improving the heat exchange efficiency.

[0036] The flue gas after heat exchange in the first heat exchange chamber 11 enters the second heat exchange chamber 12 to further exchange heat with the convective heating tubes 3. The convective heating tubes 3 adopt a serpentine structure, which increases the contact area between the flue gas and the heating tubes, enabling the full recovery and utilization of the remaining heat energy in the flue gas. At the same time, the smoke baffle wall 121 arranged inside the second heat exchange chamber 12 further increases the flow path of the flue gas, facilitating the full heat exchange of the flue gas.

[0037] The heat-exchanged flue gas is discharged from the furnace body 1 through the exhaust pipe 13. At this time, the temperature of the flue gas has been significantly reduced, achieving the goal of a low exhaust gas temperature. During the entire heat exchange process, the organic heat carrier enters and exits through the medium inlets and outlets of the radiation heat exchange tubes 2 and the convective heating tubes 3, absorbing the heat energy in the flue gas, thereby completing the conversion and transfer of heat energy.

[0038] In addition, to maintain the cleanliness and efficient operation of the boiler, a slag collection tank 14 and a cleaning port 141 are provided at the bottom of the second heat exchange chamber 12 to facilitate the cleaning of impurities. At the same time, a front arch 51 is provided at one end of the combustion chamber 5, and a rear arch 52 is provided at the other end, providing sufficient combustion space for the fuel. A heat insulation layer made of asbestos material is also provided on the outer wall of the furnace body 1, which has a good heat insulation effect and reduces the energy consumption during the operation of the boiler.

[0039] Finally, it should be noted that components such as the chain grate 4 in this embodiment, and the electronic components in the above components are all general standard components or components known to those skilled in the art. Their structures and principles can be known by those skilled in the art through technical manuals or obtained through conventional experimental methods. At the idle places of this device, all the above electrical components are respectively connected by wires. The specific connection means should refer to the working sequence of each electrical component in the above working principle to complete the electrical connection, which are all well-known technologies in the art.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An organic heat carrier furnace with a serpentine tube heating surface, comprising a furnace body (1), characterized in that: Inside the furnace body (1), a first heat exchange chamber (11) and a second heat exchange chamber (12) are provided. A chain grate (4) is installed at the bottom of the furnace body (1). Above the chain grate (4), a combustion chamber (5) is provided. At the top of the combustion chamber (5), the first heat exchange chamber (11) is provided. On one side of the first heat exchange chamber (11), the second heat exchange chamber (12) is provided. A smoke exhaust pipe (13) is connected to the outside of the second heat exchange chamber (12). Inside the first heat exchange chamber (11), radiation heat exchange tubes (2) are installed. Inside the second heat exchange chamber (12), convective heating tubes (3) are installed; The radiation heat exchange tubes (2) include an inner coil (21), a middle coil (22), and an outer coil (23). A first return flue is formed between the inner coil (21) and the middle coil (22). A second return flue is formed between the middle coil (22) and the outer coil (23). A third return flue is formed between the outer coil (23) and the inner wall of the first heat exchange chamber (11). The inner coil (21), the middle coil (22), and the outer coil (23) are sequentially connected, and medium inlets and outlets are provided at both ends.

2. The organic heat carrier furnace with a serpentine tube heating surface according to claim 1, characterized in that: At the top of one end of the chain grate (4), a hopper (41) is installed. At the other end of the chain grate (4), an air blowing port (42) is provided.

3. The organic heat carrier furnace with a serpentine tube heating surface according to claim 1, characterized in that: Inside the second heat exchange chamber (12), a smoke deflecting wall (121) is provided.

4. The organic heat carrier furnace with a serpentine tube heating surface according to claim 1, characterized in that: At the bottom of the second heat exchange chamber (12), a slag collecting tank (14) is provided. On one side of the slag collecting tank (14), a cleaning port (141) is provided.

5. The organic heat carrier furnace with a serpentine tube heating surface according to claim 1, characterized in that: The convective heating tubes (3) are of a serpentine structure, and medium inlets and outlets are provided at both ends.

6. The organic heat carrier furnace with a serpentine tube heating surface according to claim 1, characterized in that: At one end of the combustion chamber (5), a front arch (51) is provided. At the other end, a rear arch (52) is provided.

7. The organic heat carrier furnace with a serpentine tube heating surface according to claim 1, characterized in that: A layer of heat insulation layer is provided on the outer wall of the furnace body (1).

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