Multi-heat-storage natural gas crucible furnace

Abstract

The multi-heat-storage natural gas crucible furnace comprises a furnace body, a heat recovery bin is arranged at the upper end of the furnace body, a combustion chamber is arranged in the furnace body, and part of heat in the combustion chamber is discharged to the heat recovery bin; the heat recovery device is installed in the heat recovery bin and used for recovering redundant heat in the combustion chamber. The heat energy utilization efficiency of the boiler can be remarkably improved, the gas cost is reduced, the effects of energy conservation and emission reduction are achieved by reducing the combustion time and reducing the gas consumption, and the problems of heat waste, slow temperature rise, high operation cost and the like in the prior art are solved.

Description

Technical Field

[0001] The invention relates to a clamp boiler, in particular to a multi-heat storage natural gas crucible furnace. Background Art

[0002] Among the current industrial heating equipment, natural gas boilers are widely used due to their efficient and clean combustion characteristics. However, during the operation of traditional natural gas boilers, the combustion chamber directly discharges the high-temperature gas generated by combustion into the flue, resulting in a large amount of heat energy that cannot be effectively utilized, causing heat waste and excessive energy consumption. In addition, the heating process of traditional boilers is relatively slow. In order to achieve the expected furnace temperature, more natural gas resources need to be consumed, which further increases the operating cost and has an adverse impact on the energy conservation and emission reduction goals.

[0003] In recent years, with the implementation of energy-saving and environmental protection policies and the rise in energy costs, how to improve the thermal energy utilization rate of natural gas boilers, shorten the heating time, and thus reduce the use of natural gas and reduce carbon emissions has become a technical problem that needs to be solved in the field of industrial heating equipment. To this end, researchers at home and abroad have gradually begun to explore the capture and reuse of waste heat during boiler operation through heat recovery devices. The core of this technology is to use waste heat to preheat the air entering the furnace through a reasonable design of the heat recovery structure, thereby accelerating the furnace temperature rise and reducing the combustion time and consumption of natural gas.

[0004] In the existing technology, some boilers adopt a single heat recovery solution, but it is often difficult to effectively solve the balance problem between heat loss and rapid temperature rise. For example, some equipment only simply recovers the exhaust heat through the flue gas heat exchanger, and fails to further store or fully utilize the recovered heat, which limits the improvement of the overall operating efficiency of the boiler. In addition, due to insufficient structural design or limited technical means, these solutions are difficult to achieve deep utilization of waste heat and continuous heating capacity, resulting in poor stability and long-term economic benefits of recovered heat. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a multi-heat storage natural gas crucible furnace, which is a new type of multi-heat storage natural gas boiler device that can efficiently utilize the waste heat of the combustion chamber, significantly reduce the use of natural gas, and has the ability to quickly heat up, so as to effectively address the above problems in the prior art, thereby achieving energy saving and consumption reduction and environmental protection goals.

[0006] The present invention is realized by the following technical scheme: a multi-heat storage natural gas crucible furnace, comprising:

[0007] A furnace body, wherein a heat recovery bin is disposed at the upper end of the furnace body, a combustion chamber is disposed in the furnace body, and part of the heat in the combustion chamber is discharged to the heat recovery bin;

[0008] A heat recovery device, installed in the heat recovery bin, for recovering excess heat in the combustion chamber;

[0009] An air delivery component is installed outside the furnace body, and the output end of the air delivery component is connected to the air inlet end of the heat recovery device, so as to input the external air into the heat recovery device for heat absorption and then input it into the furnace body for use;

[0010] A negative pressure air suction component is installed outside the furnace body and is used to guide the excess heat in the combustion chamber toward the heat recovery device and heat the heat recovery device.

[0011] As a preferred technical solution, the heat recovery device includes a heat collecting rectangular frame, a first heat collecting group is installed on the upper end of the heat collecting rectangular frame, a second heat collecting group is arranged on the side of the heat collecting rectangular frame, and the air inlet end of the first heat collecting group is connected to the air outlet end of the air conveying component.

[0012] As a preferred technical solution, external air is transported to the second solar collection group for heating after being absorbed by the first solar collection group. A first air duct is arranged between the output end of the first solar collection group and the second solar collection group. The output end of the second solar collection group is connected to the solar collection rectangular frame through a second air duct. The hot air absorbed by the second solar collection group enters the solar collection rectangular frame.

[0013] As a preferred technical solution, the first heat collecting group includes a first heat collecting plate and a second heat collecting plate, one or more first heating tubes are arranged between the first heat collecting plate and the second heat collecting plate, the first air guide tube is arranged on the second heat collecting plate, and the external air circulates and is heated in turn between the first heat collecting plate, the first heating tube and the second heat collecting plate, the second air guide tube is arranged at the far end of the second heat collecting plate away from the first air guide tube, and an air inlet interface is also arranged on the second heat collecting plate.

[0014] As a preferred technical solution, at least one first partition is provided in the first heat collecting plate and the second heat collecting plate, and the first partition is used to divide the interior of the first heat collecting plate and the second heat collecting plate into a plurality of transition cavities, and each first heating tube is provided with a first heating channel, and the first heating channel is communicated with the transition cavities in the first heat collecting plate and the second heat collecting plate, and the external air circulates back and forth through the transition cavities and the first heating channels and flows toward the second air guide tube for heating.

[0015] As a preferred technical solution, the second heat collecting group includes a third heat collecting plate, a fourth heat collecting plate and one or more second heating tubes, and the one or more second heating tubes are connected between the third heat collecting plate and the fourth heat collecting plate. After absorbing heat by the first heat collecting group, the hot air circulates between the third heat collecting plate, the second heating tube and the fourth heat collecting plate and outputs to the heat collecting rectangular frame after absorbing heat.

[0016] As a preferred technical solution, the heat collecting rectangular frame includes a horizontal plate surface and a vertical plate surface, the horizontal plate surface and the vertical plate surface are both connected and conductive, and a labyrinth airflow channel structure is arranged inside the horizontal plate surface and the vertical plate surface.

[0017] As a preferred technical solution, the maze airflow channel structure includes a plurality of regularly arranged second partitions arranged in the horizontal plate surface and the vertical plate surface, and the second partitions are connected end to end to form a second heating channel. An air heating conveying pipe is provided at the output end of the heat collecting rectangular frame, and the air heating conveying pipe is connected to the furnace body.

[0018] As a preferred technical solution, the air delivery component includes an air delivery fan for inputting external cold air into the heat recovery device, and the negative pressure suction component adopts a suction fan for guiding part of the hot air toward the heat recovery device for heating.

[0019] As a preferred technical solution, an electric control box is further provided on the outside of the furnace body, and a door panel is further provided on the outside of the heat recovery bin.

[0020] The beneficial effects of the present invention are as follows: the present invention uses the excess heat discharged from the combustion chamber to preheat the outside air through a heat recovery device disposed in the heat recovery bin, and then transports the heat-absorbed air into the furnace body. Through such a structural design, not only can the heat energy of the high-temperature gas originally discharged directly from the combustion chamber be effectively recovered, but the heating rate of the furnace can also be greatly increased, and the burning time of the burner can be reduced. At the same time, through the heat recovery device with multiple heat storage structures, the storage and continuous release of heat can be further realized, so that the insulation time of the furnace is longer, thereby significantly reducing the use of natural gas. The above technical scheme significantly improves the thermal energy utilization efficiency of the boiler, reduces the gas cost, and achieves the effect of energy conservation and emission reduction by reducing the combustion time and reducing the gas consumption, and solves the problems of heat waste, slow heating, and high operating costs in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 The heat recovery device of the present invention is schematically shown in FIG. Figure 1 ;

[0024] Figure 3 It is a partial internal schematic diagram of the heat recovery device of the present invention;

[0025] Figure 4 It is a partial schematic diagram of the interior of the heat collection rectangular frame of the present invention;

[0026] Figure 5 The heat recovery device of the present invention is schematically shown in FIG. Figure 2 ;

[0027] Description of reference numerals:

[0028] 1. Furnace body; 2. Heat recovery chamber; 16. Heat collecting rectangular frame; 7. First heat collecting plate; 9. Second heat collecting plate; 8. First heating tube; 20. First air duct; 15. Second air duct; 18. First partition; 19. Transition cavity; 17. First heating channel; 10. Third heat collecting plate; 11. Fourth heat collecting plate; 12. Second heating tube; 163. Horizontal plate surface; 162. Vertical plate surface; 161. Second partition; 164. Second heating channel; 14. Air heating delivery pipe; 5. Air delivery fan; 4. Suction fan; 6. Electric control box; 3. Door panel; 13. Air inlet interface. DETAILED DESCRIPTION

[0029] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0030] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0031] like Figure 1-Figure 5As shown, a multi-heat storage natural gas crucible furnace of the present invention comprises a furnace body 1, a heat recovery bin 2 is arranged at the upper end of the furnace body 1, and a combustion chamber is arranged inside the furnace body 1;

[0032] Part of the heat generated in the combustion chamber will be discharged into the heat recovery bin 2 and recovered by the heat recovery device installed in the heat recovery bin 2;

[0033] The heat recovery device uses excess heat from the combustion chamber to preheat the air, thereby improving the efficiency of heat energy utilization;

[0034] The air delivery assembly is installed outside the furnace body 1, and the external air is input into the heat recovery device through its output end. After the air absorbs heat through the heat recovery device, it is sent back to the furnace body 1 for use. By preheating the air, the furnace temperature rise time is further reduced and the gas consumption is reduced.

[0035] In order to more efficiently guide the heat in the combustion chamber into the heat recovery device, a negative pressure suction component is also set up. This component attracts the residual heat in the combustion chamber and transfers it to the heat recovery device through a certain negative pressure, so that it can continue to receive heat input and maintain a high temperature state;

[0036] The heat recovery device includes a heat collecting rectangular frame 16, on the upper end of which a first heat collecting group is installed, and on the side a second heat collecting group is arranged. The air inlet end of the first heat collecting group is connected to the air outlet end of the air conveying component. After the external air is preheated by the first heat collecting group, it is conveyed to the second heat collecting group for further heating.

[0037] like Figure 2 and Figure 3 As shown, in the first heat collecting group, a first heat collecting plate 7 and a second heat collecting plate 9 are provided, one or more first heating tubes 8 are arranged between the two heat collecting plates, forming a primary heating unit, and the external air starts from the first heat collecting plate 7 and flows through the first heating tube 8 and the second heat collecting plate 9 in sequence to achieve preliminary heating, and the output end of the first heat collecting group is connected to the second heat collecting group through the first air guide pipe 20, and the preliminary heated air is further sent to the second heat collecting group, and the air flows back and forth between the heat collecting plates through more than one first heating tube 8 and the second heating tube 12, forming a dense airflow rotation channel, so that when the airflow flows through the heat recovery device, it can absorb as much heat as possible, improve the heat absorption rate, and thus achieve the purpose of rapid temperature rise;

[0038] like Figure 2 As shown, the second heat collection group includes a plurality of second heating tubes 12 between the third heat collection plate 10 and the fourth heat collection plate 11, in which air circulates and, after being absorbed again, finally enters the interior of the heat collection rectangular frame 16. The internal structure of the second heat collection group is the same as that of the first heat collection group, and will not be described in detail in this embodiment.

[0039] The heat collecting rectangular frame 16 conducts the preheated air to the interior of the furnace body 1 through the internal space formed by the horizontal plate surface 163 and the vertical plate surface 162. In order to further improve the heating efficiency, a labyrinth airflow channel structure is provided inside the horizontal plate surface 163 and the vertical plate surface 162 of the heat collecting rectangular frame 16. The horizontal plate surface and the vertical plate surface are connected to each other, and the largest air path is connected end to end. The purpose is to increase the airflow path to increase the heat absorption rate and improve the outlet temperature value;

[0040] like Figure 4 As shown, the structure is composed of a plurality of regularly arranged second partitions 161, and the partitions are butted end to end to form a second heating channel 164. When the air flows in the labyrinth channel, it is fully heated and evenly transported to the inside of the furnace body 1. Through the labyrinth structure, the internal space distance of the heat collecting rectangular frame 16 is increased, so that the airflow can absorb more heat.

[0041] In this embodiment, Figure 1 As shown, the air delivery component introduces external cold air into the heat recovery device through an air delivery fan 5. At the same time, the negative pressure suction component guides the heat from the combustion chamber to the heat recovery device through the suction fan 4, thereby forming a complete heat recovery and utilization cycle. When the air delivery fan 5 is working, the external air is blown into the air inlet interface 13, and then enters the first heat collection group for heating. After the first heat collection group absorbs heat, it enters the second heat collection group, and then enters the heat collection rectangular frame 16 after further absorbing heat by the second heat collection group. The air flowing through the heat collection rectangular frame 16 is discharged into the furnace body 1 for use after finally absorbing heat, thus forming a cycle.

[0042] In addition, for the convenience of operation and maintenance, an electric control box 6 is provided outside the furnace body 1 for controlling and monitoring the operation status of the equipment, and a door panel 3 is also designed outside the heat recovery bin 2 for convenient inspection and maintenance operations.

[0043] In summary, this embodiment achieves efficient recovery and multiple utilization of heat during the furnace heating process, significantly reduces natural gas consumption, improves boiler operation efficiency, and achieves the goal of energy conservation and emission reduction.

[0044] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope defined in the claims.

Claims

1. A multi-heat storage natural gas crucible furnace, characterized in that: include: A furnace body (1), wherein a heat recovery bin (2) is disposed at the upper end of the furnace body (1), a combustion chamber is disposed in the furnace body (1), and part of the heat in the combustion chamber is discharged to the heat recovery bin (2); A heat recovery device, installed in the heat recovery bin (2), for recovering excess heat in the combustion chamber; An air conveying assembly is installed outside the furnace body (1), the output end of the air conveying assembly is connected to the air inlet end of the heat recovery device, and is used to input external air into the heat recovery device for heat absorption and then input into the furnace body (1) for use; A negative pressure air suction component is installed outside the furnace body (1) and is used to guide excess heat in the combustion chamber toward the heat recovery device and heat the heat recovery device.

2. The multi-heat storage natural gas crucible furnace according to claim 1, characterized in that: The heat recovery device comprises a heat collecting rectangular frame (16), a first heat collecting group is installed on the upper end of the heat collecting rectangular frame (16), a second heat collecting group is arranged on the side of the heat collecting rectangular frame (16), and an air inlet end of the first heat collecting group is connected to an air outlet end of the air conveying component.

3. The multi-heat storage natural gas crucible furnace according to claim 2, characterized in that: External air is transported to the second heat collection group for heating after being absorbed by the first heat collection group. A first air guide pipe (20) is provided between the output end of the first heat collection group and the second heat collection group. The output end of the second heat collection group is connected to the heat collection rectangular frame (16) via a second air guide pipe (15). Hot air absorbed by the second heat collection group enters the heat collection rectangular frame (16).

4. The multi-heat storage natural gas crucible furnace according to claim 3, characterized in that: The first heat collecting group comprises a first heat collecting plate (7) and a second heat collecting plate (9); one or more first heating tubes (8) are arranged between the first heat collecting plate (7) and the second heat collecting plate (9); the first air guide tube (20) is arranged on the second heat collecting plate (9); external air circulates and is heated in sequence between the first heat collecting plate (7), the first heating tube (8) and the second heat collecting plate (9); the second air guide tube (15) is arranged at a far end of the second heat collecting plate (9) away from the first air guide tube (20); and an air inlet interface (13) is also arranged on the second heat collecting plate (9).

5. The multi-heat storage natural gas crucible furnace according to claim 4, characterized in that: The first heat collecting plate (7) and the second heat collecting plate (9) are both provided with at least one first partition (18), and the first partition (18) is used to divide the interior of the first heat collecting plate (7) and the second heat collecting plate (9) into a plurality of transition chambers (19). Each first heating tube (8) is provided with a first heating channel (17), and the first heating channel (17) is communicated with the transition chambers (19) in the first heat collecting plate (7) and the second heat collecting plate (9). External air reciprocates through the transition chambers (19) and the first heating channel (17) and flows toward the second air guide tube (15) for heating.

6. The multi-heat storage natural gas crucible furnace according to claim 3, characterized in that: The second heat collecting group comprises a third heat collecting plate (10), a fourth heat collecting plate (11) and one or more second heating tubes (12); the one or more second heating tubes (12) are connected and arranged between the third heat collecting plate (10) and the fourth heat collecting plate (11); after the hot air absorbs heat through the first heat collecting group, it circulates between the third heat collecting plate (10), the second heating tubes (12) and the fourth heat collecting plate (11) and outputs the heat to the heat collecting rectangular frame (16) after absorbing heat.

7. The multi-heat storage natural gas crucible furnace according to claim 2, characterized in that: The heat collecting rectangular frame (16) comprises a horizontal plate surface (163) and a vertical plate surface (162); the horizontal plate surface (163) and the vertical plate surface (162) are both connected and conductive, and a labyrinth airflow channel structure is provided inside the horizontal plate surface (163) and the vertical plate surface (162).

8. The multi-heat storage natural gas crucible furnace according to claim 7, characterized in that: The labyrinth airflow channel structure comprises a plurality of regularly arranged second partitions (161) arranged in the horizontal plate surface (163) and the vertical plate surface (162), the second partitions (161) are connected end to end and form a second heating channel (164), and an air heating conveying pipe (14) is arranged at the output end of the heat collecting rectangular frame (16), and the air heating conveying pipe (14) is connected to the furnace body (1).

9. The multi-heat storage natural gas crucible furnace according to claim 1, characterized in that: The air delivery component comprises an air delivery fan (5) for inputting external cold air into the heat recovery device, and the negative pressure suction component adopts a suction fan (4) for guiding part of the hot air towards the heat recovery device for heating.

10. The multi-heat storage natural gas crucible furnace according to claim 1, characterized in that: An electric control box (6) is also provided outside the furnace body (1), and a door panel (3) is also provided outside the heat recovery bin (2).

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