Gas pressure broadband stable working and low-nitrogen emission heat energy equipment and adjusting device

Abstract

The utility model provides gas pressure broadband stable work and low nitrogen emission heat energy equipment and an adjusting device, which comprises a combustion module, a heat exchange module, an exhaust fume collecting hood, a fan and a condensation module, the exhaust fume collecting hood is provided with an air inlet and an air door structure, and the air inlet is communicated with an inner cavity of the exhaust fume collecting hood; the air door structure is movably arranged at the air inlet; the gas flow of the air inlet is adjusted according to the gas pressure, and a part of air is introduced through the air inlet to dilute the ratio of the gas to the air in the flue gas, so that the flue gas cannot reach the combustion recovery concentration after entering the condensation module; meanwhile, when the gas flow of the air inlet is increased, the flow of air entering the combustion module is correspondingly reduced, so that flames become stable, flame separation cannot be caused, the phenomenon of unstable combustion is effectively avoided, and the problem that nitric oxide exceeds the standard is solved; in addition, the adjusting device and the heat energy equipment using the adjusting device can achieve broadband stable work under different gas pressure working conditions.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal energy equipment, and particularly relates to a thermal energy equipment and a regulating device with wide-frequency stable operation of gas pressure and low nitrogen emission. Background Technique

[0002] The thermal energy equipment uses gas as an energy source, and heats water by the heat generated by gas combustion to make the water temperature meet the requirements of life, heating, etc. However, as Figure 1 shown, during the operation of the thermal energy equipment, if the gas pressure decreases, the gas flow rate entering the combustion module will also decrease accordingly. When the air flow rate ① entering the combustion module remains unchanged, the flame in the combustion module will leave the combustion plane and form a lifted flame, resulting in unstable combustion, and the flue gas (containing a certain amount of unburned gas and air) will enter the condensation module under the action of the fan. Since the internal cavity volume of the condensation module of the existing thermal energy equipment is larger than that of the flue, the flow rate of the condensation module is relatively low. Once the above-mentioned unburned gas and air resume combustion, an explosion combustion phenomenon will occur in the condensation module, and it will also cause the nitrogen oxide emission to exceed the standard. Content of the Utility Model

[0003] In order to overcome the above technical defects, the utility model provides a thermal energy equipment and a regulating device with wide-frequency stable operation of gas pressure and low nitrogen emission, which can solve the technical problems of unstable combustion and excessive nitrogen oxide emission mentioned in the background technique.

[0004] The utility model is realized according to the following technical solutions:

[0005] The utility model provides a regulating device, which includes: a combustion module, a heat exchange module, a smoke collecting hood, a fan and a condensation module. The inner cavities of the combustion module, the heat exchange module, the fan and the condensation module are sequentially connected: wherein, the smoke collecting hood is provided with an air inlet and a damper structure, and the air inlet is connected to the inner cavity of the smoke collecting hood; the damper structure is arranged at the air inlet and is movably arranged to have an open state and a closed state; wherein,

[0006] When the damper structure is in the open state, the damper structure has at least one opening degree, so that the air inlet has at least one opening degree to change the gas flow rate of the air inlet;

[0007] When the damper structure is in the closed state, the damper structure completely blocks the air inlet.

[0008] Compared with the prior art, the present application innovatively sets an air inlet and a damper structure at the smoke collecting hood. The debugging personnel adjust the gas flow rate of the air inlet according to the gas pressure of the fuel gas. When the fuel gas pressure is low, a part of air is introduced through the air inlet to dilute the ratio of fuel gas and air in the flue gas, so that the concentration of the flue gas reaching the condensation module cannot reach the concentration for reignition. At the same time, since when the gas flow rate of the air inlet increases, the air flow rate entering the combustion module will correspondingly decrease, making the flame stable without causing flame lift-off, effectively avoiding the occurrence of unstable combustion, and also solving the problem of excessive nitrogen oxides caused by unstable combustion. In addition, since the gas flow rate of the air inlet can be changed according to the gas pressure of the fuel gas, the adjustment device of the present application and the thermal energy equipment using this adjustment device can achieve broadband stable operation under different fuel gas pressure conditions.

[0009] In one embodiment, the damper structure includes a shielding door, and the shielding door is rotatably connected to the smoke collecting hood, and the flow cross-section of the shielding door relative to the air inlet is arranged in parallel;

[0010] When the damper structure is in the closed state, the shielding door is in the closed position;

[0011] When the opening degree of the damper structure is different, the rotation angle of the shielding door relative to its closed position is different.

[0012] In one embodiment, the air inlet includes at least one fan-shaped opening, the shielding door includes at least one fan-shaped door, and the fan-shaped doors are arranged in one-to-one correspondence with the fan-shaped openings.

[0013] In one embodiment, the number of the fan-shaped doors is at least two; each of the fan-shaped doors is independently rotatable;

[0014] In one embodiment, the damper structure includes a shielding door and a guide rail, and the guide rail is arranged in parallel along the length direction of the air inlet; the shielding door is movably arranged on the guide rail, and the flow cross-section of the shielding door relative to the air inlet is arranged in parallel;

[0015] When the damper structure is in the closed state, the shielding door is in the closed position;

[0016] When the opening degree of the damper structure is different, the shielding door translates different distances along the length direction of the guide rail relative to its closed position.

[0017] In one embodiment, at least one indication mark is provided at the edge position of the air inlet, and the at least one indication mark is arranged in one-to-one correspondence with at least one opening degree of the damper structure.

[0018] The present utility model further provides a thermal energy device with wide - frequency stable operation of gas pressure and low nitrogen emissions, which includes:

[0019] A housing having an accommodation cavity;

[0020] The adjusting device as described above, which is arranged on the accommodation cavity.

[0021] In one embodiment, the housing is provided with an operation port, and the operation port is communicated with the accommodation cavity;

[0022] The air inlet and the air damper structure are arranged corresponding to the operation port.

[0023] In one embodiment, the thermal energy device further includes a maintenance door, which is rotatably connected to the housing and is used to open or cover the operation port.

[0024] In one embodiment, the housing includes a main body part and a sub - body part, and the sub - body part is arranged on the periphery of the main body part;

[0025] The main body part has the accommodation cavity, the sub - body part has a storage cavity, and the storage cavity is communicated with the accommodation cavity through the operation port; a pipe group and a circulating water pump are arranged in the storage cavity, and the circulating water pump is connected with the heat exchange module through the pipe group;

[0026] The sub - body part is rotatably connected to the maintenance door. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following further describes in detail the specific embodiments of the present utility model with reference to the drawings, where:

[0028] Figure 1 is a schematic diagram of the prior art;

[0029] Figure 2 is one of the schematic diagrams of the adjusting device in Embodiment 1 of the present utility model (one opening degree when the air damper structure is in the open state);

[0030] Figure 3 is another schematic diagram of the adjusting device in Embodiment 1 of the present utility model (one opening degree when the air damper structure is in the open state);

[0031] Figure 4 is the third schematic diagram of the adjusting device in Embodiment 1 of the present utility model (when the air damper structure is in the closed state);

[0032] Figure 5 is the fourth schematic diagram of the adjusting device in Embodiment 1 of the present utility model (one opening degree when the air damper structure is in the open state);

[0033] Figure 6 Isometric view of the heat energy device according to Embodiment 2 of the present utility model;

[0034] Figure 7 Isometric view of the heat energy device according to Embodiment 2 of the present utility model (opening the maintenance door);

[0035] Figure 8 One of the schematic diagrams of the adjusting device according to Embodiment 3 of the present utility model (one opening degree when the air damper structure is in the open state);

[0036] Figure 9 Another schematic diagram of the adjusting device according to Embodiment 3 of the present utility model (one opening degree when the air damper structure is in the open state);

[0037] Figure 10 The third schematic diagram of the adjusting device according to Embodiment 3 of the present utility model (when the air damper structure is in the closed state).

[0038] Explanation of reference numerals:

[0039] 10 Combustion module, 20 Heat exchange module, 30 Smoke collecting hood, 40 Fan, 410 Air inlet, 420 Shading door, 430 Guide rail, 50 Condensation module, 60 Housing, 601 Main body part, 602 Sub-body part, 610 Accommodation cavity, 620 Operation port, 630 Maintenance door, 640 Storage cavity, 650 Pipeline group, 660 Circulation water pump. Detailed implementation manners

[0040] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not used to limit the present utility model.

[0041] In order to better elaborate the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0042] It should be clear that the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the embodiments of the present application.

[0043] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "the" and "said" used in the embodiments of the present application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0044] When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects and do not necessarily need to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0045] In addition, in the description of the present application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0046] As Figure 1 shown, during the operation of the thermal energy device, if the gas pressure decreases, the gas flow rate entering the combustion module will also decrease accordingly. When the air ① flow rate entering the combustion module remains unchanged, the flame in the combustion module will leave the combustion plane and form a lifted flame, resulting in unstable combustion. Moreover, the flue gas (containing a certain amount of unburned gas and air) will enter the condensation module under the action of the fan. Since the internal cavity volume of the condensation module of the existing thermal energy device is larger than that of the flue, the flow rate in the condensation module is relatively low. Once the above unburned gas and air resume combustion, a deflagration phenomenon will occur in the condensation module, which will also lead to excessive nitrogen oxide emissions. This makes the combustion unstable and even causes excessive emissions of nitrogen oxides (NOx).

[0047] Embodiment 1

[0048] Combined with Figures 2 to 5 shown, this embodiment provides a regulating device, which includes: a combustion module 10, a heat exchange module 20, a condensation module 50, a smoke collecting hood 30 and a fan 40. The inner cavities of the combustion module 10, the heat exchange module 20, the fan 40 and the condensation module 50 are sequentially connected: wherein, the smoke collecting hood 30 is provided with an air inlet 410 and a damper structure, the air inlet 410 is connected to the inner cavity of the smoke collecting hood 30; the damper structure is arranged at the air inlet 410 and is movably arranged to have an open state and a closed state;

[0049] Wherein, when the air damper structure is in the open state, the air damper structure has at least one opening degree, so that the air inlet 410 has at least one opening degree, thereby changing the gas flow rate of the air inlet 410; when the air damper structure is in the closed state, the air damper structure completely blocks the air inlet 410.

[0050] Specifically, the adjustment device of this embodiment acts on the thermal energy device. The combustion module 10 burns gas to heat the water in the heat exchange module 20. The gas generated during the combustion process flows into the condensation module 50 under the action of the fan 40, and finally is discharged to the external environment through the smoke exhaust pipe. Since each thermal energy device equipped with the above adjustment device will work normally based on a certain gas pressure or gas pressure range during factory production, this gas pressure is defined as the reference gas pressure; therefore, before the thermal energy device is connected to the corresponding pipeline and works at the customer site, this embodiment measures the gas pressure at the customer site to obtain the actual gas pressure, and changes the working state of the air damper structure according to the actual gas pressure, thereby changing the gas flow rate of the air inlet 410 at the smoke collecting hood 30.

[0051] Compared with the prior art, this application innovatively sets an air inlet and an air damper structure at the smoke collecting hood. The debugging personnel adjust the gas flow rate of the air inlet according to the gas pressure. When the gas pressure is low, a part of air is introduced through the air inlet to dilute the ratio of gas and air in the flue gas, so that the concentration of the flue gas cannot reach the concentration for reignition after entering the condensation module; at the same time, since the gas flow rate of the air inlet increases, the air flow rate entering the combustion module will correspondingly decrease, making the flame stable without causing flame lift-off, effectively avoiding the occurrence of unstable combustion, and also solving the problem of excessive nitrogen oxides caused by unstable combustion. In addition, since the gas flow rate of the air inlet can be changed according to the gas pressure, the adjustment device of this application and the thermal energy device using this adjustment device can achieve broadband stable operation under different gas pressure conditions.

[0052] According to the applicant's repeated experiments, this embodiment can be used within the gas pressure range of 1500Pa to 3000Pa. For example, when the gas is at low pressure, the gas flow rate is increased, and when the gas is at high pressure, the gas flow rate is decreased to achieve broadband startup; moreover, the emission of nitrogen oxides (NOx) is reduced to 9mg / (Kw*h), which is far lower than the national highest emission limit level 6 (60mg / Kw*h) and the strictest special emission limit of 30mg / (Kw*h) in the Beijing-Tianjin-Hebei region. It should be noted that the aforementioned low pressure and high pressure refer to the comparison of the actual gas pressure with the reference gas pressure, and the reference gas pressure is used to determine whether the gas pressure is high or low, rather than the general sense of high and low pressure.

[0053] In this embodiment, the damper structure includes a shielding door 420, which is rotatably connected to the smoke hood 30 and is arranged parallel to the flow cross-section of the air inlet 410. When the damper structure is closed, the shielding door 420 is in the closed position. When the damper structure is opened to different degrees, the shielding door 420 rotates at different angles relative to its closed position. In this embodiment, the damper structure can be switched between a closed state and an open state by rotating the shielding door 420.

[0054] Specifically, when the damper structure is in a closed state, the shielding door 420 is in a closed position, and the gas flow of the air inlet 410 is 0 at this time; by rotating the shielding door 420, the shielding door 420 is rotated by a first angle relative to its closed position, then the damper structure is in an open state and in a first opening degree, so that the air inlet 410 is in a first opening degree, and the gas flow of the air inlet 410 is the first gas flow; by continuing to rotate the shielding door 420, the shielding door 420 is rotated by a second angle relative to its closed position, then the damper structure is in an open state and in a second opening degree, so that the air inlet 410 is in a second opening degree, and the gas flow of the air inlet 410 is the second gas flow; and the same applies to other opening degrees.

[0055] It should be noted that the damper structure has at least one opening degree, and the opening degree of the multiple air inlets 410 can be adjusted through the above-mentioned rotation.

[0056] Furthermore, the air inlet 410 includes at least one fan-shaped opening, and the shielding door 420 includes at least one fan-shaped door, and the fan-shaped doors are arranged in a one-to-one correspondence with the fan-shaped openings. Specifically, when the air inlet 410 is a single fan-shaped opening, the number of the shielding door 420 is also one, and the shielding door 420 is rotatably connected to the smoke hood 30 via a rotating shaft, and the rotating shaft is set at the center end of the fan-shaped opening; when the air inlet 410 is two fan-shaped openings, the centers of the two fan-shaped openings are on the same axis, and the number of the shielding doors 420 is also two, and the two shielding doors 420 are rotatably connected to the smoke hood 30 via a rotating shaft, and the rotating shaft is set at the center end of the fan-shaped opening. This embodiment can increase the gas flow of the air inlet 410 at its maximum opening by providing multiple fan-shaped openings.

[0057] Preferably, the shielding door 420 is a fan-shaped plate structure.

[0058] Furthermore, the number of the sector doors is at least two; each of the sector doors is independently rotatable; in this embodiment, each sector door is rotated independently so as to match different opening degrees according to the states of each sector door, combined with Figure 4 As shown, for example, when there are two sector doors, one of the sector doors is in the closed position, while the other sector door rotates at a certain angle to make the air door structure in the open state and at a certain opening degree.

[0059] Furthermore, at least one indication mark is provided at the edge position of the air inlet 410, and the at least one indication mark is correspondingly arranged with at least one opening degree of the air door structure, so that the debug personnel can quickly rotate the sector door to the position corresponding to the indication mark according to the indication mark, so as to quickly adjust to the corresponding opening degree and facilitate the adjustment.

[0060] Embodiment 2

[0061] Combined with Figures 6 to 7 As shown, this embodiment provides a thermal energy device with wide-frequency stable operation of gas pressure and low nitrogen emission, which includes: a housing 60 having a receiving cavity 610; the adjusting device as described above, which is arranged on the receiving cavity 610. The adjusting device in the above Embodiment 1 is arranged in the receiving cavity 610 and heats water to realize the functions of providing hot water or heating. It should be noted that the thermal energy device with wide-frequency stable operation of gas pressure and low nitrogen emission (for the convenience of understanding, hereinafter referred to as thermal energy device in the whole text), the thermal energy device includes but is not limited to volumetric water heaters, commercial hot water boilers (modular boilers), wall-mounted boilers, etc.

[0062] Furthermore, the housing 60 is provided with an operation port 620, and the operation port 620 is communicated with the receiving cavity 610; the air inlet 410 and the air door structure are correspondingly arranged with respect to the operation port 620, so that the debug personnel can operate the air door structure through the operation port 620, avoiding the situation that it is difficult to adjust due to the position of the air door structure being too concealed.

[0063] Preferably, the air inlet 410 and the air door structure are arranged directly opposite to the operation port 620, which can be understood as that the side of the smoke collecting hood 30 where the air inlet 410 and the air door structure are located is directly opposite to the operation port 620, so that the debug personnel can quickly adjust through the operation port 620.

[0064] Furthermore, the thermal energy device further includes a maintenance door 630, which is rotatably connected to the housing 60 and is used to open or cover the operation port 620.

[0065] Furthermore, the shell 60 includes a main body part 601 and a secondary body part 602, and the secondary body part 602 is arranged on the peripheral side of the main body part 601; the main body part 601 has the accommodating cavity 610, and the secondary body part 602 has a storage cavity 640, and the storage cavity 640 is connected to the accommodating cavity 610 through the operating port 620; a pipe group 650 and a circulating water pump 660 are arranged in the storage cavity 640, and the circulating water pump 660 is connected to the heat exchange module 20 through the pipe group 650; the secondary body part 602 is rotatably connected to the maintenance door 630.

[0066] The circulating water pump 660 is then connected to the heat exchange module 20 through the cold water pipe of the pipe group 650, so as to input cold water into the heat exchange module 20; after the heat exchange module 20 heats the cold water and obtains hot water, the hot water is input into the water storage tank through the hot water pipe of the pipe group 650; by reasonably arranging the pipe group 650 and the circulating water pump 660 in the storage cavity 640, unified assembly and maintenance operations can be performed after opening the maintenance door 630.

[0067] Example 3

[0068] Combine Figures 8 to 10 As shown, this embodiment is basically the same as embodiment 1, with the difference that the damper structure of this embodiment includes a shielding door 420 and a guide rail 430, and the guide rail 430 is arranged parallel to the length direction of the air inlet 410; the shielding door 420 is movably arranged on the guide rail 430, and the shielding door 420 is arranged parallel to the flow section of the air inlet 410; when the damper structure is in a closed state, the shielding door 420 is in a closed position; when the degree of opening of the damper structure is different, the shielding door 420 is translated by different distances relative to its closed position along the length direction of the guide rail 430.

[0069] Specifically, when the damper structure is in a closed state, the shielding door 420 is in a closed position, and the gas flow of the air inlet 410 is 0 at this time; by pushing the shielding door 420 and making it translate, the shielding door 420 is translated a first distance relative to its closed position, then the damper structure is in an open state and in a first opening degree, so that the air inlet 410 is in a first opening degree, and the gas flow of the air inlet 410 is the first gas flow; by continuing to push the shielding door 420, the shielding door 420 is translated a second distance relative to its closed position, then the damper structure is in an open state and in a second opening degree, so that the air inlet 410 is in a second opening degree, and the gas flow of the air inlet 410 is the second gas flow; and the same applies to other opening degrees.

[0070] Example 4

[0071] This embodiment is basically the same as Embodiment 2, except that a thermal energy device with wide - frequency stable operation of gas pressure and low nitrogen emissions in this embodiment includes: a housing 60, which has a receiving cavity 610; and the adjusting device as described in Embodiment 3 above, which is arranged on the receiving cavity 610. The adjusting device in Embodiment 3 above is arranged in the receiving cavity 610 and heats water to achieve the functions of providing hot water or heating.

[0072] Example 5

[0073] This embodiment is basically the same as Embodiment 1, except that the air damper structure in this embodiment further includes a servo motor. The servo motor is drivingly connected to the shielding door 420 in Embodiment 1 through a bracket, and the rotation of the servo motor is used to drive the shielding door 420 to rotate so as to switch between the closed state and the open state.

[0074] Example 6

[0075] This embodiment is basically the same as Embodiment 3, except that the air damper structure in this embodiment further includes a servo motor. The servo motor is drivingly connected to the shielding door 420 in Embodiment 3 through a bracket, and the servo motor is used to drive the shielding door 420 to translate so as to switch between the closed state and the open state.

[0076] According to the disclosure and teaching of the above - mentioned specification, those skilled in the art of the present utility model can also make changes and modifications to the above - mentioned embodiments. Therefore, the present utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present utility model should also fall within the protection scope of the claims of the present utility model. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present utility model.

Claims

1. A regulating device, characterized in that: include: Combustion module, heat exchange module, smoke hood, fan and condensing module, the inner cavities of the combustion module, the heat exchange module, the fan and the condensing module are connected in sequence: wherein, The smoke hood is provided with an air inlet and a damper structure, wherein the air inlet is communicated with the inner cavity of the smoke hood; the damper structure is arranged at the air inlet and can be movably arranged to have an open state and a closed state; wherein, When the damper structure is in an open state, the damper structure has at least one opening degree, so that the air inlet has at least one opening degree, so as to change the gas flow rate of the air inlet; When the damper structure is in a closed state, the damper structure completely blocks the air inlet.

2. The adjustment device according to claim 1, characterized in that: The damper structure includes a shielding door, which is rotatably connected to the smoke collecting hood and is arranged parallel to the flow cross section of the air inlet; When the damper structure is in a closed state, the shielding door is in a closed position; When the opening degrees of the damper structure are different, the rotation angles of the shielding door relative to its closed position are different.

3. The adjustment device according to claim 2, characterized in that: The air inlet includes at least one fan-shaped opening, and the shielding door includes at least one fan-shaped door, and the fan-shaped doors are arranged in a one-to-one correspondence with the fan-shaped opening.

4. The adjustment device according to claim 3, characterized in that: The number of the fan-shaped doors is at least two; each of the fan-shaped doors is independently rotatable.

5. The adjustment device according to claim 1, characterized in that: The damper structure includes a shielding door and a guide rail, wherein the guide rail is arranged parallel to the length direction of the air inlet; the shielding door is movably arranged on the guide rail, and the shielding door is arranged parallel to the flow cross section of the air inlet; When the damper structure is in a closed state, the shielding door is in a closed position; When the opening degree of the damper structure is different, the shielding door moves in translation along the length direction of the guide rail by different distances relative to its closed position.

6. The adjusting device according to any one of claims 1 to 5, characterized in that: At least one indicator mark is provided at an edge position of the air inlet, and the at least one indicator mark is provided in a one-to-one correspondence with at least one opening degree of the damper structure.

7. A thermal energy device with wide-band stable operation of gas pressure and low nitrogen emission, characterized in that: include: a housing having a receiving cavity; The adjusting device according to any one of claims 1 to 6, which is arranged on the accommodating cavity.

8. The thermal energy equipment with wide-band stable operation of gas pressure and low nitrogen emission according to claim 7 is characterized by: The housing is provided with an operating port, and the operating port is communicated with the accommodating cavity; The air inlet and the damper structure are arranged corresponding to the operation port.

9. The thermal energy equipment with wide-band stable operation of gas pressure and low nitrogen emission according to claim 8 is characterized by: The thermal energy equipment further comprises a maintenance door, which is rotatably connected to the shell and is used to open or cover the operation port.

10. The thermal energy equipment with wide-band stable operation of gas pressure and low nitrogen emission according to claim 9 is characterized in that: The housing comprises a main body portion and a secondary body portion, wherein the secondary body portion is arranged on a peripheral side of the main body portion; The main body has the accommodating cavity, and the auxiliary body has a receiving cavity, and the receiving cavity is connected to the accommodating cavity through the operation port; a pipe group and a circulating water pump are provided in the receiving cavity, and the circulating water pump is connected to the heat exchange module through the pipe group; The auxiliary body portion is rotatably connected to the maintenance door.

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