Flue gas waste heat utilization device for direct fire heating combustion chamber
By setting up a combustion chamber and a secondary heating chamber at the bottom of the boiling pot and forming a spiral rising flue with a partition, secondary heating of flue gas and open flames is achieved, and the problem of small heating area of the traditional direct-fire heating boiling pot is solved, which improves the heat utilization rate and reduces energy loss.
Patent Information
- Application Number
- CN202421351181.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-06-13
AI Technical Summary
The heating area of the traditional straight-fire heating boiler is small, resulting in low thermal energy utilization and increasing energy loss.
A flue gas waste heat utilization device for direct heat heating combustion chamber is designed. By setting a combustion chamber and a secondary heating chamber at the bottom of the boiling pot, and spiraling partitions in the secondary heating chamber, forming a spiral rising flue, so that the flue gas and part of the open flame are secondary heating, increasing the effective heating area of the boiling pot.
The thermal energy utilization rate of the direct fire heating combustion chamber is improved, energy loss is reduced, and the flow diversion through the partition is avoided, and the direct emission of flue gas and open flames is further improved, and the thermal energy utilization rate is further improved.
Smart Images
Figure CN222834273U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of direct fire heating, in particular to a device for utilizing waste heat of flue gas in a direct fire heating combustion chamber. Background Art
[0002] In the wort production process, the wort needs to be heated to remove the sulfide and shrinkage wort in the original wort; the existing wort boiling pots have three heating methods: electric heating, steam heating and direct fire heating. Conventional direct fire heating boiling pots use the open flame made by the burner to enter the lower combustion chamber of the tank body to directly heat the lower cone of the tank body to achieve the purpose of boiling (high temperature) sterilization. This design has great disadvantages. Since the open flame only contacts the bottom of the pot body, the effective heating area is small, which reduces the utilization rate of thermal energy to a certain extent and increases energy loss. In addition, the heat emitted by the burner flame is not fully utilized, and part of the heat will be discharged from the combustion chamber through the chimney with the flue gas, further reducing the utilization rate of thermal energy and increasing energy loss. Utility Model Content
[0003] The utility model aims to provide a device for utilizing waste heat of flue gas in a direct-fire heating combustion chamber, so as to solve the problem that the heating area of a boiling pot is small and improve the utilization rate of heat energy in the direct-fire heating combustion chamber.
[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions:
[0005] A device for utilizing waste heat from flue gas in a direct-fire heated combustion chamber comprises a combustion chamber arranged at the bottom of a boiling pot, and a burner interface and a smoke exhaust pipe respectively connected to the combustion chamber. The bottom of the boiling pot is surrounded by a secondary heating chamber, and a partition is spirally arranged in the secondary heating chamber. The partition divides the secondary heating chamber into a spirally ascending smoke duct, and both ends of the smoke duct are respectively connected to the combustion chamber and the smoke exhaust pipe.
[0006] Furthermore, the flue and the boiling pot are respectively provided with a plurality of outer spiral tubes and inner spiral tubes, and also include a first connecting tube and a second connecting tube respectively connected to the outer spiral tubes and the inner spiral tubes, and one end of the second connecting tube extends to the outside of the boiling pot.
[0007] Furthermore, a water inlet valve is provided at one end of the second connecting pipe.
[0008] Furthermore, the first connecting pipe and the second connecting pipe are fixedly arranged on the boiling pot, and are respectively connected to the outer spiral pipe and the inner spiral pipe through flanges.
[0009] Furthermore, the inner spirals of the outer spiral tube and the inner spiral tube are provided with guide grooves.
[0010] Furthermore, the contact surface between the boiling pot and the secondary heating chamber is made of corrugated plate.
[0011] Furthermore, the bottom of the boiling pot is arranged tilted.
[0012] Furthermore, a plurality of arc-shaped grooves are arranged at the bottom of the boiling pot.
[0013] Compared with the prior art, the beneficial effects of the present invention are:
[0014] 1. After the open flame produced by the burner burns in the combustion chamber, the generated open flame enters the combustion chamber at the lower part of the tank body to directly heat the lower cone of the tank body, achieving the purpose of boiling (high temperature) sterilization;
[0015] 2. The smoke and part of the open flame generated during the combustion process rise to the top of the combustion chamber, enter the secondary heating chamber connected to the combustion chamber, and contact the side of the tank body. The high-temperature smoke and open flame exchange heat with the wort in the cooking pot through the tube wall of the boiling pot, thereby performing secondary heating on the wort in the boiling pot, increasing the effective heating area of the boiling pot, thereby improving the thermal energy utilization rate of the direct fire heating combustion chamber and reducing energy loss;
[0016] 3. At the same time, through the diversion of the partition, the smoke and part of the open flame gradually spiral upward in the flue, avoiding the smoke and part of the open flame directly passing through the flue and being discharged to the outside through the exhaust pipe, thereby improving the thermal energy utilization rate of the direct fire heating combustion chamber and reducing energy loss. Finally, the smoke is discharged to the outside through the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Attached Figure 1 It is a structural schematic diagram of the combustion chamber of the utility model.
[0018] Attached Figure 2 This utility model is attached Figure 1 A partial enlarged view of area A in the middle.
[0019] Attached Figure 3 It is a structural schematic diagram of an outer spiral tube and an inner spiral tube of the utility model.
[0020] Numbers shown in the accompanying drawings:
[0021] 1. Boiling pot; 2. Combustion chamber; 3. Burner interface; 4. Smoke exhaust pipe; 5. Secondary heating chamber; 6. Partition; 7. Flue; 8. Outer spiral pipe; 9. Inner spiral pipe; 10. First connecting pipe; 11. Second connecting pipe; 12. Water inlet valve; 13. Flange; 14. Guide groove; 15. Corrugated plate; 16. Groove. DETAILED DESCRIPTION
[0022] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.
[0023] A device for utilizing waste heat from flue gas in a direct-fired combustion chamber, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a combustion chamber 2 arranged at the bottom of a boiling pot 1, and a burner interface 3 and a smoke exhaust pipe 4 respectively connected to the combustion chamber 2. The open flame produced by the burner enters the combustion chamber 2 at the lower part of the tank body to directly heat the lower cone of the tank body, so as to achieve the purpose of boiling (high temperature) sterilization; the bottom of the boiling pot 1 is surrounded by a secondary heating chamber 5, and a partition 6 is spirally arranged in the secondary heating chamber 5. The partition 6 divides the secondary heating chamber 5 into a spirally ascending flue 7, and the two ends of the flue 7 are respectively connected to the combustion chamber 2 and the smoke exhaust pipe 4. After the open flame produced by the burner burns in the combustion chamber 2, The generated flue gas and part of the open flame rise to the top of the combustion chamber 2, and then enter the secondary heating chamber 5 connected to the combustion chamber 2, and contact the side of the tank body, so as to perform secondary heating on the wort in the boiling pot 1, thereby increasing the effective heating area of the boiling pot 1, thereby improving the thermal energy utilization rate of the direct fire heating combustion chamber 2 and reducing energy loss; at the same time, through the guidance of the partition 6, the flue gas and part of the open flame gradually spirally rise in the flue 7, avoiding the flue gas and part of the open flame directly passing through the flue 7 and being discharged to the outside through the smoke exhaust pipe 4, thereby improving the thermal energy utilization rate of the direct fire heating combustion chamber 2 and reducing energy loss.
[0024] Preferably, Figure 1 , Figure 2 and Figure 3 As shown, the flue 7 and the boiling pot 1 are respectively provided with a plurality of outer spiral tubes 8 and inner spiral tubes 9, and also include a first connecting tube 10 and a second connecting tube 11 respectively connected to the outer spiral tube 8 and the inner spiral tube 9, one end of the second connecting tube 11 extends to the outside of the boiling pot 1, and specifically the end of the second connecting tube 11 is connected to an external water source, and a certain amount of circulating water is input into the second connecting tube 11 through the external water source, so that the circulating water flows through the outer spiral tube 8, the first connecting tube 10 and the inner spiral tube 9 in sequence, and finally returns to the second connecting tube 11, when the circulating water passes through the outer spiral tube 8, the high-temperature flue gas in the flue 7 exchanges heat with the low-temperature circulating water through the wall of the outer spiral tube 8, thereby increasing the temperature of the circulating water, and when the circulating water passes through the inner threaded tube, the higher-temperature circulating water exchanges heat with the lower-temperature wort in the cooking pot through the wall of the inner spiral tube 9, further increasing the effective heating area of the cooking pot, thereby improving the thermal energy utilization rate of the direct fire heating combustion chamber 2, and reducing energy loss.
[0025] Preferably, Figure 3 As shown, a water inlet valve 12 is provided at one end of the second connecting pipe 11 to control the flow of external water in and out of the outer spiral tube 8 and the inner spiral tube 9, so as to facilitate the subsequent cleaning of the outer spiral tube 8 and the inner spiral tube 9 and avoid the formation of scale on the outer spiral tube 8 and the inner spiral tube 9, thereby improving the thermal energy utilization rate of the direct fire heating combustion chamber 2 and reducing energy loss.
[0026] Preferably, Figure 1 and Figure 3 As shown, the first connecting tube 10 and the second connecting tube 11 are fixedly arranged on the boiling pot 1, and are respectively connected to the outer spiral tube 8 and the inner spiral tube 9 through the flange 13. When the outer spiral tube 8 or the inner spiral tube 9 is damaged, it is only necessary to remove the flange 13 at the corresponding position and replace the corresponding section of the outer spiral tube 8 or the inner spiral tube 9, so as to achieve better operation of the outer spiral tube 8 or the inner spiral tube 9, improve the maintenance efficiency of the outer spiral tube 8 and the inner spiral tube 9, and reduce the maintenance cost of the outer spiral tube 8 and the inner spiral tube 9.
[0027] Preferably, Figure 2 As shown, the inner spirals of the outer spiral tube 8 and the inner spiral tube 9 are provided with guide grooves 14. The guide grooves 14 guide the water flow, so that the water flow inside the outer spiral tube 8 and the inner spiral tube 9 forms a vortex and generates violent disturbances, thereby increasing the heat exchange efficiency between the water flow and the liquid inside the boiling pot 1 or the flue gas in the flue 7, thereby improving the thermal energy utilization rate of the direct fire heating combustion chamber 2 and reducing energy loss.
[0028] Preferably, Figure 1 and Figure 2 As shown, the contact surface between the boiling pot 1 and the secondary heating chamber 5 adopts a corrugated plate 15, which increases the contact area between the boiling pot 1 and the combustion chamber 2, improves the thermal energy utilization rate of the direct fire heating combustion chamber 2, and reduces energy loss.
[0029] Preferably, Figure 1 As shown, the bottom of the boiling pot 1 is tilted to increase the contact area between the boiling pot 1 and the combustion chamber 2, improve the thermal energy utilization rate of the combustion chamber 2 heated by direct fire, and reduce energy loss.
[0030] Preferably, Figure 1 As shown, a plurality of arc-shaped grooves 16 are provided at the bottom of the boiling pot 1 to increase the contact area between the boiling pot 1 and the combustion chamber 2, thereby improving the thermal energy utilization rate of the combustion chamber 2 heated by direct fire and reducing energy loss.
[0031] Example 1
[0032] The utility model provides a device for utilizing waste heat of flue gas in a direct-fire heating combustion chamber, such as Figure 1 , Figure 2 and Figure 3As shown, after the open flame produced by the burner burns in the combustion chamber 2, the generated open flame enters the combustion chamber 2 at the lower part of the tank body to directly heat the lower cone of the tank body, thereby achieving the purpose of boiling (high temperature) sterilization;
[0033] The generated smoke and part of the open flame rise to the top of the combustion chamber 2, and then enter the secondary heating chamber 5 connected to the combustion chamber 2, and contact the side of the tank body. The high-temperature smoke and open flame exchange heat with the wort in the rice cooker through the tube wall of the boiling pot 1, thereby performing secondary heating on the wort in the boiling pot 1, increasing the effective heating area of the boiling pot 1, and thus improving the thermal energy utilization rate of the direct fire heating combustion chamber 2 and reducing energy loss.
[0034] At the same time, through the guidance of the partition 6, the smoke and part of the open flame gradually spiral up in the flue 7, avoiding the smoke and part of the open flame directly passing through the flue 7 and being discharged to the outside through the smoke exhaust pipe 4, thereby improving the thermal energy utilization rate of the direct fire heating combustion chamber 2 and reducing energy loss. Finally, the smoke is discharged to the outside through the smoke exhaust pipe 4.
[0035] Example 2
[0036] Based on Example 1, Figure 1 , Figure 2 and Figure 3 As shown, the valve on the second connecting pipe 11 is opened, and a certain amount of circulating water is input from the external water source to the second connecting pipe 11 through a water pump, so that the circulating water flows through the outer spiral pipe 8, the first connecting pipe 10 and the inner spiral pipe 9 in sequence, and finally returns to the second connecting pipe 11, and then the valve on the second connecting pipe 11 is closed, and the circulating water is connected in the outer spiral pipe 8, the first connecting pipe 10, the inner spiral pipe 9 and the second connecting pipe 11 in sequence through the water pump;
[0037] When the circulating water passes through the outer spiral tube 8, the high-temperature flue gas in the flue 7 exchanges heat with the low-temperature circulating water through the wall of the outer spiral tube 8, thereby increasing the temperature of the circulating water. When the circulating water passes through the inner threaded tube, the higher-temperature circulating water exchanges heat with the lower-temperature wort in the rice cooker through the wall of the inner spiral tube 9, further increasing the effective heating area of the rice cooker, thereby improving the thermal energy utilization rate of the direct-fire heating combustion chamber 2 and reducing energy loss.
[0038] After using for a period of time, the water inlet valve 12 provided on the second connecting pipe 11 is opened, and the circulating water in the outer spiral pipe 8, the first connecting pipe 10, the inner spiral pipe 9 and the second connecting pipe 11 is drained, and then water is injected into the second connecting pipe 11 again, and the water flow is guided by the guide grooves 14 provided on the outer spiral pipe 8 and the inner spiral pipe 9, so that the water flow inside the outer spiral pipe 8 and the inner spiral pipe 9 forms a vortex and generates violent disturbances, thereby flushing the scale produced on the wall of the outer spiral pipe 8 and the inner spiral pipe 9, increasing the heat exchange efficiency of the liquid inside the boiling pot 1 or the flue gas in the flue 7, thereby improving the thermal energy utilization rate of the direct fire heating combustion chamber 2 and reducing energy loss.
[0039] When the outer spiral tube 8 or the inner spiral tube 9 is damaged, it is only necessary to remove the flange 13 at the corresponding location and replace the corresponding section of the outer spiral tube 8 or the inner spiral tube 9 to achieve better operation of the outer spiral tube 8 or the inner spiral tube 9, improve the maintenance efficiency of the outer spiral tube 8 and the inner spiral tube 9, and reduce the maintenance cost of the outer spiral tube 8 and the inner spiral tube 9.
[0040] Example 3
[0041] Based on Example 1, Figure 1 , Figure 2 As shown, the contact surface between the boiling pot 1 and the secondary heating chamber 5 adopts a corrugated plate 15, which increases the contact area between the boiling pot 1 and the combustion chamber 2, improves the thermal energy utilization rate of the combustion chamber 2 heated by direct fire, and reduces energy loss; at the same time, the bottom of the boiling pot 1 is inclined to increase the contact area between the boiling pot 1 and the combustion chamber 2, improves the thermal energy utilization rate of the combustion chamber 2 heated by direct fire, and reduces energy loss; in addition, a plurality of arc-shaped grooves 16 are provided at the bottom of the boiling pot 1, which increase the contact area between the boiling pot 1 and the combustion chamber 2, improves the thermal energy utilization rate of the combustion chamber 2 heated by direct fire, and reduces energy loss.
Claims
1. A device for utilizing waste heat of flue gas in a direct-fire heating combustion chamber, comprising a combustion chamber (2) arranged at the bottom of a boiling pot (1), and a burner interface (3) and a smoke exhaust pipe (4) respectively connected to the combustion chamber (2), characterized in that: The bottom of the boiling pot (1) is surrounded by a secondary heating chamber (5), and a partition (6) is spirally arranged inside the secondary heating chamber (5). The partition (6) divides the secondary heating chamber (5) into a spirally ascending flue (7), and the two ends of the flue (7) are respectively connected to the combustion chamber (2) and the smoke exhaust pipe (4).
2. The device for utilizing waste heat from flue gas in a direct-fire heating combustion chamber according to claim 1, characterized in that: The flue (7) and the boiling pot (1) are respectively provided with a plurality of outer spiral tubes (8) and inner spiral tubes (9), and also include a first connecting tube (10) and a second connecting tube (11) respectively connected to the outer spiral tubes (8) and the inner spiral tubes (9), one end of the second connecting tube (11) extending to the outside of the boiling pot (1).
3. The device for utilizing waste heat from flue gas in a direct-fire heating combustion chamber according to claim 2, characterized in that: A water inlet valve (12) is provided at one end of the second connecting pipe (11).
4. The device for utilizing waste heat from flue gas in a direct-fired combustion chamber according to claim 2, characterized in that: The first connecting pipe (10) and the second connecting pipe (11) are fixedly arranged on the boiling pot (1), and are respectively connected to the outer spiral pipe (8) and the inner spiral pipe (9) through flanges (13).
5. The device for utilizing waste heat from flue gas in a direct-fired combustion chamber according to claim 2, characterized in that: The inner spirals of the outer spiral tube (8) and the inner spiral tube (9) are provided with flow guide grooves (14).
6. The device for utilizing waste heat from flue gas in a direct-fire combustion chamber according to claim 1, characterized in that: The contact surface between the boiling pot (1) and the secondary heating chamber (5) is made of a corrugated plate (15).
7. The device for utilizing waste heat from flue gas in a direct-fired combustion chamber according to claim 1, characterized in that: The bottom of the boiling pot (1) is arranged inclined.
8. The device for utilizing waste heat from flue gas in a direct-fired combustion chamber according to claim 1, characterized in that: The bottom of the boiling pot (1) is provided with a plurality of arc-shaped grooves (16).