Waste heat boiler utilizing internal bypass to adjust heat source proportion

Abstract

The utility model relates to the technical field of waste gas waste heat recovery, in particular to a waste heat boiler for adjusting the heat source proportion through an inner bypass. The boiler comprises a boiler body and a main flue arranged in the middle of the boiler body, the boiler body is provided with a vertical partition plate, and bypass flues are arranged along the side portion of the main flue at intervals. A multi-turning-plate linkage structure is jointly arranged along the bottoms of the main flue and the bypass flue; a heat source entering the main flue enters the bypass flue after the opening degree of the heat source is adjusted through the multi-turning-plate linkage structure. The multi-turning-plate linkage structure is used for adjusting the heat source proportion of the main flue and the bypass flue and comprises a bypass motor, a linkage shaft and an inner bypass turning plate, and the bypass motor drives the linkage shaft to drive the inner bypass turning plate to rotate relative to the boiler body, so that the opening degree of the multi-turning-plate linkage structure is controlled along with the change of the steam load. By means of the vertical partition plate, the bypass flue and the multi-turning-plate linkage structure, the function of adjusting the heat source proportion through an inner bypass is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas waste heat recovery, in particular to a waste heat boiler which utilizes internal bypass to adjust the heat source ratio. Background Art

[0002] When conventional waste heat boilers are under maintenance, the front-end heat source equipment still needs to be operated, so a bypass flue is required to discharge high-temperature waste heat flue gas. To solve this problem, technicians have made many attempts, such as the 180 annular heating waste heat utilization system disclosed in Chinese patent CN210952394U, which controls the direction of flue gas flow through the flue plug valve to recycle the waste heat of the flue gas of the annular heating furnace. However, this system still has shortcomings: its bypass flue is external and needs to be used in conjunction with the flue gas three-way valve. The external three-way valve and bypass flue not only occupy a large area, but the three-way valve uses a single flap to isolate the flue gas, which has a large torque, resulting in high power and energy consumption of the supporting motor; at the same time, the single flap has poor sealing, a high leakage rate, and frequent failures, which is not conducive to flue gas bypass operation. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a waste heat boiler which utilizes an internal bypass to adjust the heat source ratio.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] A waste heat boiler that uses internal bypass to adjust the heat source ratio includes a boiler body and a main flue arranged in the middle of the boiler body. The boiler body is provided with vertical partitions, and bypass flues are arranged at intervals along the sides of the main flue; a multi-flap linkage structure is jointly provided along the bottom of the main flue and the bypass flue; the heat source entering the main flue enters the bypass flue after the opening is adjusted by the multi-flap linkage structure.

[0006] This technical solution utilizes vertical baffles, a bypass flue, and a multi-flap linkage structure to achieve the function of adjusting the heat source ratio through internal bypass. Specifically, the main flue in the middle of the boiler body is the primary channel for the heat source. When maintenance is required, the heat source can be discharged through the bypass flue. In actual operation, the load of the waste heat boiler fluctuates with changes in steam consumption. By adjusting the opening of the multi-flap linkage structure, the heat source can be fully utilized under different loads. The multi-flap linkage structure acts as a regulating device. By changing its opening, it can control the ratio of heat source entering the main flue and the bypass flue, thereby achieving flexible heat distribution.

[0007] In addition, the waste heat boiler that utilizes internal bypass to adjust the heat source ratio according to the present invention may also have the following additional technical features:

[0008] According to one embodiment of the present invention, the multi-flap linkage structure is used to adjust the heat source ratio of the main flue and the bypass flue, and includes a bypass motor, a linkage shaft and an inner bypass flap, wherein: the bypass motor is connected to the inner bypass flap through the linkage shaft; the inner bypass flap is installed at the bottom of the main flue and the bypass flue through the linkage shaft; the bypass motor drives the linkage shaft to drive the inner bypass flap to rotate relative to the boiler body, thereby controlling the opening of the multi-flap linkage structure as the steam load changes.

[0009] This technical solution achieves precise adjustment of the heat source ratio between the main flue and the bypass flue through the bypass motor, linkage shaft, and inner bypass flap. Specifically, when the bypass motor starts, it drives the linkage shaft to rotate, which in turn drives the inner bypass flap to rotate around its mounting shaft. In actual operation, changes in steam load will cause fluctuations in heat source demand. The multi-flap linkage structure can establish a dynamic balance between the main flue and the bypass flue by adjusting the opening of the inner bypass flap. When the steam load increases, the bypass motor drives the inner bypass flap to reduce its opening, allowing more heat source to enter the main flue for heat exchange. Conversely, when the steam load decreases, the inner bypass flap increases its opening, allowing part of the heat source to be discharged through the bypass flue to avoid excess heat.

[0010] According to one embodiment of the present invention, the bypass motor is turned on when the boiler body is under maintenance, and the heat source is discharged into the atmosphere through the main flue and the bypass flue.

[0011] This technical solution discharges the heat source into the atmosphere when the boiler body is being overhauled by opening the bypass motor, thereby ensuring the safety of the overhaul process.

[0012] According to one embodiment of the present invention, the inner bypass flap is composed of a plurality of independent flaps, each flap is driven by a separate linkage shaft, and the linkage shafts are connected in sequence.

[0013] Each flap in this solution is driven by a separate linkage shaft. Compared to the single-flap design of a traditional three-way valve, this reduces flap torque and the power requirements of the supporting motor. This not only reduces energy consumption but also reduces the failure rate caused by excessive torque. Furthermore, the increased number of flaps allows for more precise flue gas control and improves waste heat recovery efficiency.

[0014] According to one embodiment of the present invention, when the inner bypass flap is in a horizontal state, the inner bypass flap will completely block the main flue; when the inner bypass flap is in an inclined state, the heat source of the main flue is guided to the side bypass flue via the inclined flap.

[0015] This technical solution realizes the guidance control of the flow of the main flue heat source to the bypass flue through different states of the inner bypass flap, such as horizontal or inclined.

[0016] According to one embodiment of the present invention, the multi-flap linkage structure is prefabricated inside the boiler body when leaving the factory, and cooperates with the main flue and the bypass flue to form a heat exchange channel.

[0017] This technical solution prefabricates a multi-flap linkage structure inside the boiler body, which cooperates with the main flue and bypass flue to form an efficient heat exchange channel. Since the internal bypass flap is directly set inside the boiler body and closely cooperates with the main flue and bypass flue, no additional external space and pipelines are required, which greatly saves floor space and reduces construction and maintenance costs.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) The function of adjusting the heat source ratio by internal bypass is realized through vertical partitions, bypass flues and multi-flap linkage structure.

[0020] (2) The internal bypass flap is driven by a separate linkage shaft. Compared with the single flap form of the traditional three-way valve, it reduces the torque of the flap and the power requirement of the matching motor, which not only reduces energy consumption but also reduces the failure rate caused by excessive torque.

[0021] (3) The internal bypass flap is directly installed inside the boiler body and closely cooperates with the main flue and bypass flue. Therefore, no additional external space and pipelines are required, which greatly saves floor space and reduces construction and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the entire utility model.

[0023] Figure 2 It is a structural diagram of the main flue and the bypass flue.

[0024] Figure 3 It is a structural diagram of a multi-flap linkage structure.

[0025] In the figure: 1. Boiler body; 2. Main flue; 3. Bypass flue; 4. Partition; 5. Multi-flap linkage structure; 51. Bypass motor; 52. Linkage shaft; 53. Inner bypass flap. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figures 1 to 3 As shown, this embodiment provides a waste heat boiler that uses internal bypass to adjust the heat source ratio, including a boiler body 1, and a main flue 2 arranged in the middle of the boiler body 1, the boiler body 1 is provided with a vertical partition 4, and bypass flues 3 are arranged at intervals along the sides of the main flue 2; along the bottom of the main flue 2 and the bypass flue 3, a multi-flap linkage structure 5 is jointly provided; the heat source entering the main flue 2 enters the bypass flue 3 after the opening is adjusted by the multi-flap linkage structure 5.

[0029] like Figures 1 to 3 As shown, this technical solution utilizes a vertical baffle 4, a bypass flue 3, and a multi-flap linkage structure 5 to achieve the function of adjusting the heat source ratio through internal bypass. Specifically, the main flue 2 in the middle of the boiler body 1 is the primary channel for the heat source. When maintenance is required, the heat source can be discharged through the bypass flue 3. In actual operation, the load of the waste heat boiler fluctuates with changes in steam consumption. By adjusting the opening of the multi-flap linkage structure 5, the heat source can be fully utilized under different loads. The multi-flap linkage structure 5 acts as a regulating device. By changing its opening, it can control the ratio of heat source entering the main flue 2 and bypass flue 3, thereby achieving flexible heat distribution.

[0030] In addition, the waste heat boiler that utilizes internal bypass to adjust the heat source ratio according to the present invention may also have the following additional technical features:

[0031] According to one embodiment of the present invention, the multi-flap linkage structure 5 is used to adjust the heat source ratio of the main flue 2 and the bypass flue 3, and includes a bypass motor 51, a linkage shaft 52 and an inner bypass flap 53, wherein: the bypass motor 51 is connected to the inner bypass flap 53 respectively through the linkage shaft 52; the inner bypass flap 53 is installed at the bottom of the main flue 2 and the bypass flue 3 through the linkage shaft 52; the bypass motor 51 drives the linkage shaft 52 to drive the inner bypass flap 53 to rotate relative to the boiler body 1, thereby controlling the opening of the multi-flap linkage structure 5 as the steam load changes.

[0032] This technical solution achieves precise adjustment of the heat source ratio of the main flue 2 and the bypass flue 3 through the bypass motor 51, the linkage shaft 52 and the inner bypass flap 53. Specifically, when the bypass motor 51 is started, it drives the linkage shaft 52 to rotate, thereby driving the inner bypass flap 53 to rotate around its installation axis; in actual operation, changes in steam load will cause fluctuations in the demand for heat sources; the multi-flap linkage structure 5 can establish a dynamic balance between the main flue 2 and the bypass flue 3 by adjusting the opening of the inner bypass flap 53; when the steam load increases, the bypass motor 51 drives the inner bypass flap 53 to reduce the opening, so that more heat sources enter the main flue 2 for heat exchange; conversely, when the steam load decreases, the inner bypass flap 53 increases the opening, so that part of the heat source is discharged through the bypass flue 3 to avoid excess heat.

[0033] According to an embodiment of the present invention, the bypass motor 51 is turned on when the boiler body 1 is under maintenance, and the heat source is discharged into the atmosphere through the main flue 2 and the bypass flue 3 .

[0034] This technical solution discharges the heat source into the atmosphere when the boiler body 1 is under maintenance by turning on the bypass motor 51, thereby ensuring the safety of the maintenance process.

[0035] According to an embodiment of the present invention, the inner bypass flap 53 is composed of a plurality of independent flaps, each flap is driven by a separate linkage shaft 52, and the linkage shafts 52 are connected in sequence.

[0036] Each flap in this technical solution is driven by a separate linkage shaft 52. Compared to the single-flap design of a traditional three-way valve, this reduces flap torque and the power requirements of the supporting motor, thus lowering energy consumption and reducing the failure rate caused by excessive torque. Furthermore, the increased number of flaps allows for more precise flue gas control and improves waste heat recovery efficiency.

[0037] According to one embodiment of the present invention, when the inner bypass flap 53 is in a horizontal state, the inner bypass flap 53 will completely block the main flue 2; when the inner bypass flap 53 is in an inclined state, the heat source of the main flue 2 is guided to the side bypass flue 3 via the inclined flap.

[0038] This technical solution realizes the guidance control of the heat source flow from the main flue 2 to the bypass flue 3 through different states of the inner bypass flap 53, such as horizontal or inclined.

[0039] According to an embodiment of the present invention, the multi-flap linkage structure 5 is prefabricated inside the boiler body 1 when leaving the factory, and cooperates with the main flue 2 and the bypass flue 3 to form a heat exchange channel.

[0040] This technical solution forms an efficient heat exchange channel by prefabricating a multi-flap linkage structure 5 inside the boiler body 1 and cooperating with the main flue 2 and the bypass flue 3. Since the internal bypass flap 53 is directly arranged inside the boiler body 1 and closely cooperates with the main flue 2 and the bypass flue 3, no additional external space and pipelines are required, which greatly saves floor space and reduces construction and maintenance costs.

[0041] The usage process of the above embodiment is as follows:

[0042] like Figures 1 to 3 As shown, during boiler operation, the heat source enters the boiler heat exchange surface through the main flue 2 for heat exchange; in order to accurately control the amount of heat source, a bypass flue 3 is added in the same frame as the main flue 2, and the two are separated by a partition 4; a multi-flap linkage structure 5 is provided at the entrance of the bypass flue 3, and the opening is adjusted according to the change of steam load, and the heat source entering the heat exchange surface and the bypass flue 3 is flexibly distributed; when the load increases, the flap opening decreases, and more heat source enters the main flue 2; when the load decreases, the flap opening increases, and the heat source is discharged through the bypass flue 3; this structure has low torque, low motor power, and significant energy-saving effect; at the same time, the built-in bypass channel simplifies on-site installation and reduces costs; when the boiler is overhauled, the bypass motor 51 is started, and the heat source is discharged into the atmosphere through the main flue 2 and the bypass flue 3 to ensure safety; the internal bypass flap 53 is composed of independent flaps, driven by a separate linkage shaft 52, which reduces the failure rate and improves the waste heat recovery efficiency; the flap state can be flexibly adjusted to form an efficient heat exchange channel, saving space and pipeline costs.

[0043] Although the present invention has been described in detail with reference to the accompanying drawings and in conjunction with preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall be within the scope of the present invention. Any changes or substitutions that can be easily conceived by persons skilled in the art within the technical scope disclosed in the present invention shall be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope of protection of the claims.

Claims

1. A waste heat boiler that uses internal bypass to adjust the heat source ratio, comprising a boiler body (1) and a main flue (2) arranged in the middle of the boiler body (1), characterized in that: The boiler body (1) is provided with a vertical partition (4), and a bypass flue (3) is arranged at intervals along the side of the main flue (2); a multi-flap linkage structure (5) is provided along the bottom of the main flue (2) and the bypass flue (3); the heat source entering the main flue (2) enters the bypass flue (3) after adjusting the opening of the multi-flap linkage structure (5).

2. The waste heat boiler with internal bypass for adjusting heat source ratio according to claim 1, characterized in that: The multi-flap linkage structure (5) is used to adjust the heat source ratio of the main flue (2) and the bypass flue (3), and comprises a bypass motor (51), a linkage shaft (52) and an inner bypass flap (53), wherein: the bypass motor (51) is connected to the inner bypass flap (53) via the linkage shaft (52); the inner bypass flap (53) is installed at the bottom of the main flue (2) and the bypass flue (3) via the linkage shaft (52); the bypass motor (51) drives the linkage shaft (52) to drive the inner bypass flap (53) to rotate relative to the boiler body (1), thereby controlling the opening of the multi-flap linkage structure (5) as the steam load changes.

3. The waste heat boiler with internal bypass for adjusting heat source ratio according to claim 2, characterized in that: The bypass motor (51) is turned on when the boiler body (1) is under maintenance, and the heat source is discharged into the atmosphere through the main flue (2) and the bypass flue (3).

4. The waste heat boiler with internal bypass for adjusting heat source ratio according to claim 2, characterized in that: The inner bypass flap (53) is composed of a plurality of independent flaps, each flap is driven by a separate linkage shaft (52), and the linkage shafts (52) are connected in sequence.

5. The waste heat boiler with internal bypass for adjusting heat source ratio according to claim 4, characterized in that: When the inner bypass flap (53) is in a horizontal state, the inner bypass flap (53) completely blocks the main flue (2); when the inner bypass flap (53) is in an inclined state, the heat source of the main flue (2) is guided to the side bypass flue (3) via the inclined flap.

6. The waste heat boiler with internal bypass for adjusting heat source ratio according to claim 1, characterized in that: The multi-flap linkage structure (5) is prefabricated inside the boiler body (1) when it leaves the factory, and cooperates with the main flue (2) and the bypass flue (3) to form a heat exchange channel.

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