Flue gas waste heat heater and flue gas denitration system

Abstract

The utility model relates to a flue gas waste heat heater and a flue gas denitration system.The flue gas waste heat heater is used for being installed on flue gas denitration equipment, the flue gas waste heat heater comprises a base body and a fixing structure, and the fixing structure comprises a fixing part used for being connected to the base body and a supporting part used for being connected to the flue gas denitration equipment; a mounting groove is formed in the supporting part, and the mounting groove is used for allowing at least part of the fixing part to be inserted so that the flue gas waste heat heater can be hung on the flue gas denitration equipment. According to the technical scheme, the flue gas waste heat heater is supported through insertion connection of the supporting part and the fixing part, so that a worker does not need to manually lift the flue gas waste heat heater when further fixing work is conducted on the flue gas waste heat heater, more labor is saved in the fixing process, and the working efficiency is improved. Meanwhile, the flue gas waste heat heater is stably hung on the flue gas denitration equipment, the fixing process is simpler, the time required for fixing is shortened, and the mounting efficiency is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of flue gas denitration, and particularly to a flue gas waste heat heater and a flue gas denitration system. Background Art

[0002] Currently, most ammonia evaporators of domestic SCR denitration equipment adopt ammonia heating technology. For example, after heating air through a heater or other means, ammonia water is then sprayed in and heated to ammonia, which finally enters the ammonia evaporator and is sprayed into the flue. After mixing with the flue gas, it enters the SCR denitration catalyst for catalytic reaction. The heater heating technology is widely used in the ammonia treatment process.

[0003] In the related art, when the existing waste heat heater is actually used, it needs to be firmly installed through bolts. However, due to the heavy weight of the waste heat heater, multiple people are required to cooperate in lifting and holding it during the installation process, which is time-consuming, laborious, and has low efficiency. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide a flue gas waste heat heater and a flue gas denitration system, and the flue gas waste heat heater is convenient for installation to at least partially solve the above technical problems.

[0005] To achieve the above purpose, according to the first aspect of the present disclosure, a flue gas waste heat heater for installation on a flue gas denitration device is provided, including:

[0006] A base; and

[0007] A fixing structure, including a fixing portion for connecting to the base and a supporting portion for connecting to the flue gas denitration device. An installation groove is formed on the supporting portion, and the installation groove is used for at least partial insertion of the fixing portion so that the flue gas waste heat heater is hung on the flue gas denitration device.

[0008] Optionally, the fixing structure further includes a movable portion for connecting to the base, a cooperating portion for connecting to the flue gas denitration device, and a driving mechanism. The driving mechanism is used to drive the movable portion to move to abut against the cooperating portion to fix the flue gas waste heat heater to the flue gas denitration device.

[0009] Optionally, a plugging groove is formed on the cooperating portion, and the plugging groove is used for at least partial insertion of the movable portion to limit and fix the movable portion.

[0010] Optionally, the plugging groove has a first inclined surface, and the movable portion has a second inclined surface. The first inclined surface and the second inclined surface are in contact and cooperation to guide the movable portion.

[0011] Optionally, the driving mechanism includes a threaded rod, a limiting block, and a limiting groove formed in the base body. The limiting block is connected to the movable part. The limiting groove is used for the limiting block to slide and limit the limiting block to follow the rotation of the threaded rod. The threaded rod is threadedly connected to the movable part or the limiting block, and the threaded rod and the limiting groove have the same extending direction.

[0012] Optionally, the driving mechanism includes a driving member, a driving gear, and a transmission gear. The transmission gear is sleeved on the threaded rod and is meshed and connected to the driving gear. The driving member is used for driving the driving gear to rotate.

[0013] Optionally, the number of the limiting grooves is set to be multiple. The threaded rod is arranged in one of the limiting grooves, and guiding rods are arranged in the remaining limiting grooves. The guiding rods and the threaded rod have the same extending direction. A guiding block corresponding to the guiding rod is connected to the movable part, and the guiding rod penetrates through the corresponding guiding block.

[0014] Optionally, the installation groove has a third inclined surface, and the fixing part has a fourth inclined surface. The third inclined surface and the fourth inclined surface are in contact and cooperate to guide the fixing part.

[0015] Optionally, an installation cavity is arranged inside the base body. The flue gas waste heat heater includes a first heat exchanger, a second heat exchanger, a liquid inlet pipe, and a liquid return pipe arranged in the installation cavity. The liquid inlet pipe is communicated with a first heat exchange flow channel of the first heat exchanger through a pump device. A valve structure is arranged on the liquid inlet pipe. The first heat exchange flow channel of the first heat exchanger is communicated with the first heat exchange flow channel of the second heat exchanger. The liquid return pipe is communicated with the first heat exchange flow channel of the second heat exchanger. The other ends of the liquid inlet pipe and the liquid return pipe are respectively communicated with two ends of a heat exchange pipe in the flue gas denitration device;

[0016] The flue gas waste heat heater further includes a heater and a storage tank for storing ammonia water. The storage tank is sequentially communicated with a second heat exchange flow channel of the first heat exchanger and a second heat exchange flow channel of the second heat exchanger. The heater is communicated with the second heat exchange flow channel of the second heat exchanger, and the other side of the heater is connected with a discharge pipe. The other end of the discharge pipe is communicated with the inside of the flue gas denitration device for transporting ammonia gas.

[0017] According to a second aspect of the present disclosure, there is provided a flue gas denitration system, including a flue gas denitration device and the flue gas waste heat heater as described above.

[0018] Through the above technical solution, the installation of the flue gas waste heat heater on the flue gas denitration equipment can be made more convenient and labor-saving by means of a fixed structure. Specifically, the staff can pre-connect the fixing part to the base body and connect the supporting part to the flue gas denitration equipment, and then lift the flue gas waste heat heater so that at least part of the fixing part is inserted into the installation groove formed on the supporting part. In this way, the supporting part can support the fixing part, and further support the flue gas waste heat heater, so that the flue gas waste heat heater can be hung on the flue gas denitration equipment. Therefore, at this time, the preliminary installation of the flue gas waste heat heater is completed. At this time, the staff can further fix the flue gas waste heat heater. During this process, there is no need for the staff to lift the flue gas waste heat heater, the fixing process is more labor-saving, and at the same time, the flue gas waste heat heater is more stably hung on the flue gas denitration equipment, the fixing process is simpler, the time required for the fixing process is reduced, and the installation efficiency of the flue gas waste heat heater is improved.

[0019] Other features and advantages of the present disclosure will be described in detail in the following specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation manners, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0021] Figure 1 is an overall structural schematic diagram of the flue gas waste heat heater provided in the exemplary embodiment of the present disclosure;

[0022] Figure 2 is a structural schematic diagram during the process of connecting the flue gas waste heat heater to the flue gas denitration equipment provided in the exemplary embodiment of the present disclosure;

[0023] Figure 3 is a structural schematic diagram of another angle of the flue gas waste heat heater provided in the exemplary embodiment of the present disclosure;

[0024] Figure 4 is a structural schematic diagram of the driving mechanism provided in the exemplary embodiment of the present disclosure.

[0025] DESCRIPTION OF THE REFERENCE NUMERALS

[0026] 1. Flue gas denitration equipment; 2. Substrate; 21. Installation cavity; 3. Fixing structure; 31. Fixing part; 32. Supporting part; 321. Installation groove; 33. Movable part; 34. Matching part; 341. Insertion groove; 4. Driving mechanism; 41. Threaded rod; 42. Limit block; 43. Limit groove; 44. Driving part; 45. Driving gear; 46. Transmission gear; 47. Guide rod; 48. Guide block; 5. First heat exchanger; 6. Second heat exchanger; 7. Liquid inlet pipe; 71. Valve structure; 72. Pump device; 8. Liquid return pipe; 9. Heater; 91. Discharge pipe; 10. Storage box; 101. Cover. Detailed implementation manners

[0027] The following will describe the detailed implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the detailed implementation manners described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.

[0028] In the present disclosure, unless otherwise stated, "inside and outside" refer to the inside and outside of the contour of the corresponding component; "far and near" refer to the far and near in the spatial position of the corresponding component relative to another component. In addition, the terms "first", "second", etc. used in the present disclosure are used to distinguish one element from another element, and do not have sequence and importance. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0029] According to the first aspect of the present disclosure, with reference to Figures 1 to 4 as shown, the present disclosure provides a flue gas waste heat heater 9 for installation on the flue gas denitration equipment 1. The flue gas waste heat heater 9 includes a substrate 2 and a fixing structure 3. The fixing mechanism includes a fixing part 31 for connecting to the substrate 2 and a supporting part 32 for connecting to the flue gas denitration equipment 1. An installation groove 321 is formed on the supporting part 32, and the installation groove 321 is used for at least part of the fixing part 31 to be inserted so that the flue gas waste heat heater 9 is hung on the flue gas denitration equipment 1.

[0030] Through the above technical solution, the installation of the flue gas waste heat heater 9 on the flue gas denitration device 1 can be made more convenient and labor-saving by means of the fixing structure 3. Specifically, the staff can pre-connect the fixing part 31 to the base body 2 and connect the supporting part 32 to the flue gas denitration device 1, and then lift the flue gas waste heat heater 9 so that at least part of the fixing part 31 is inserted into the installation groove 321 formed on the supporting part 32. In this way, the supporting part 32 can support the fixing part 31, and further support the flue gas waste heat heater 9, so that the flue gas waste heat heater 9 can be hung on the flue gas denitration device 1. Therefore, at this time, the flue gas waste heat heater 9 is initially installed. At this time, the staff can further fix the flue gas waste heat heater 9. During this process, there is no need for the staff to lift the flue gas waste heat heater 9, the fixing process is more labor-saving, and at the same time, the flue gas waste heat heater 9 is relatively stably hung on the flue gas denitration device 1, the fixing process is simpler, the time required for the fixing process is reduced, and the installation efficiency of the flue gas waste heat heater 9 is improved.

[0031] In some embodiments, referring to Figure 2 and Figure 3 as shown, the installation groove 321 may have a third inclined surface, and the fixing part 31 may have a fourth inclined surface. The third inclined surface and the fourth inclined surface are in contact and cooperate to guide the fixing part 31. In this way, during the process of hanging the flue gas waste heat heater 9 on the flue gas denitration device 1, the third inclined surface and the fourth inclined surface are in contact and cooperate to guide the fixing part 31 to be inserted into the installation groove 321, so as to be more labor-saving and improve the installation efficiency at the same time.

[0032] It can be understood that one side wall of the installation groove 321 is inclined to form a third inclined surface. The fixing part 31 may include a first fixing block for connecting to the base body 2, and a fourth inclined surface capable of cooperating with the third inclined surface may be formed on the first fixing block. Exemplarily, referring to Figure 2 as shown, the staff hangs the flue gas waste heat heater 9 on the flue gas denitration device 1 from top to bottom (referring to the up and down direction shown in the Figure 2 drawing). Among them, the third inclined surface is formed on the side wall of the installation groove 321 away from the flue gas denitration device 1 and is configured to be inclined from the distal end towards the side close to the flue gas denitration device 1 from top to bottom, and the fourth inclined surface is configured to be inclined from the distal end towards the side close to the flue gas waste heat heater 9 from bottom to top. During the above process, the fourth inclined surface first contacts the third inclined surface and under the guidance of the third inclined surface, at least part of the fixing part 31 is inserted into the installation groove 321 to realize the hanging of the flue gas waste heat heater 9. At the same time, at this time, the third inclined surface and the fourth inclined surface are in contact with each other to limit the movement of the flue gas waste heat heater 9 towards the side away from the flue gas denitration device 1, so as to preliminarily fix the flue gas waste heat heater 9 when it is hung on the flue gas denitration device 1 and improve the stability of the flue gas waste heat heater 9 when it is hung on the flue gas denitration device 1.

[0033] Wherein, the installation groove 321 may be set as a through groove arranged along the length extension direction of the support portion 32. In some other possible implementation manners not shown in the drawings, the number of the installation grooves 321 may also be set to be multiple and arranged at intervals along the length extension direction of the support portion 32. The present disclosure does not make specific limitations thereto.

[0034] In some embodiments, referring to Figures 1 to 3 as shown, the fixing structure 3 may further include a movable portion 33 for connecting to the base body 2, a mating portion 34 for connecting to the flue gas denitration device 1, and a driving mechanism 4. Wherein, the driving mechanism 4 is used to drive the movable portion 33 to move so as to abut against the mating portion 34 to fix the flue gas waste heat heater 9 to the flue gas denitration device 1. In this way, the staff can pre-connect the movable portion 33 to the base body 2 and connect the mating portion 34 to the flue gas denitration device 1. After the flue gas waste heat heater 9 is hung on the flue gas denitration device 1 through the insertion connection of the support portion 32 and the fixing portion 31, the staff can drive the movable portion 33 to move by the driving mechanism 4 to adjust the position of the movable portion 33 until the movable portion 33 abuts against the mating portion 34 to reduce the possibility of the flue gas waste heat heater 9 detaching from the flue gas denitration device 1, thereby realizing the fixation of the flue gas waste heat heater 9.

[0035] It can be understood that, in order to further improve the stability of the connection between the flue gas waste heat heater 9 and the flue gas denitration device 1, the fixing portion 31 and the mating portion 34 may adopt a form of at least partial insertion connection. In some embodiments, referring to Figures 1 to 3 as shown, a plug-in groove 341 may be formed on the mating portion 34. The plug-in groove 341 is used for at least part of the movable portion 33 to be inserted therein to limit and fix the movable portion 33, so as to reduce the possibility of the movable portion 33 separating from the mating portion 34 and causing the flue gas waste heat heater 9 to detach from the flue gas denitration device 1, and improve the stability of the connection between the flue gas waste heat heater 9 and the flue gas denitration device 1. Exemplarily, the mating portion 34 may include a fixing block for connecting to the flue gas denitration device 1, the movable portion 33 may include a movable block drivingly connected to the driving mechanism 4, the plug-in groove 341 may be opened on one side of the fixing block close to the movable block, and a plug-in protrusion may be connected to the movable block for being inserted into the plug-in groove 341. The plug-in protrusion may be integrally formed on the movable block or formed by grooving on the movable block. In this way, by inserting the plug-in protrusion into the plug-in groove 341 to limit the movable block through the plug-in groove 341, the movable portion 33 is limited through the plug-in groove 341.

[0036] The insertion slot 341 can be formed in various shapes. Exemplarily, the insertion slot 341 can be configured as a strip-shaped slot formed along the length extension direction of the fixed block. In some other possible alternative embodiments not shown in the drawings, the insertion slot 341 can also be a plurality of counterbores formed on the side of the fixed block close to the movable block, and the plurality of counterbores are arranged at intervals along the length extension direction of the fixed block. It can be understood that the insertion protrusion can be adaptively set according to the number and shape of the insertion slots 341, and the present disclosure does not make specific limitations thereon.

[0037] In some embodiments, referring to Figures 1 to 3 as shown, the insertion slot 341 can have a first inclined surface, and the movable part 33 can have a second inclined surface. The first inclined surface and the second inclined surface are in contact and cooperate to guide the movable part 33. In this way, during the process of the driving mechanism 4 driving the movable part 33 to approach the mating part 34, the first inclined surface and the second inclined surface are in contact and cooperate to guide the movable part 33 to be inserted into the insertion slot 341, so as to improve the installation efficiency.

[0038] It can be understood that the side wall of the insertion slot 341 away from the flue gas denitration device 1 can be inclined to form a first inclined surface, and the side of the insertion protrusion close to the flue gas waste heat heater 9 can be inclined to form a second inclined surface. By driving the movable part 33 to move upward from bottom to top towards the mating part 34 by the driving mechanism 4 (referring to Figure 2 the up and down direction shown in the drawing), during this process, the second inclined surface first contacts the first inclined surface and under the guidance of the first inclined surface, the insertion protrusion is inserted into the insertion slot 341, and then the movable part 33 can abut against the mating part 34. At this time, the first inclined surface and the second inclined surface abut against each other to limit the movement of the flue gas waste heat heater 9 towards the side away from the flue gas denitration device 1, so as to fix the flue gas waste heat heater 9 when it is hung on the flue gas denitration device 1, and improve the stability of the flue gas waste heat heater 9 when it is installed on the flue gas denitration device 1.

[0039] In some embodiments, referring to Figure 3 and Figure 4 as shown, the driving mechanism 4 can include a threaded rod 41, a limiting block 42 and a limiting groove 43 formed in the base body 2. The limiting block 42 is connected to the movable part 33. The limiting groove 43 is used for the limiting block 42 to slide and limit the limiting block 42 to follow the rotation of the threaded rod 41. The threaded rod 41 is threadedly connected to the movable part 33 or the limiting block 42, and the threaded rod 41 and the limiting groove 43 have the same extension direction. In this way, by rotating the threaded rod 41 to drive the limiting block 42 to move along the limiting groove 43, and then driving the movable part 33 to move towards the mating part 34 and at least partially inserted into the insertion slot 341 through the limiting block 42. Among them, at least one side wall of the limiting groove 43 abuts against the limiting block 42 to stop the limiting block 42 from following the rotation of the threaded rod 41.

[0040] It can be understood that the threaded connection between the threaded rod 41 and the limit block 42 can achieve self-locking, that is, it can reduce the downward movement of the limit block 42 along the extension direction of the threaded rod 41 (refer to Figure 4 the drawing direction shown). Furthermore, it can reduce the possibility of the movable part 33 disengaging from the mating part 34, so as to ensure the stability of the movable part 33 abutting against the mating part 34, and further improve the stability when the flue gas waste heat heater 9 is installed on the flue gas denitration device 1.

[0041] In the present disclosure, exemplarily, the threaded rod 41 is threadedly connected to the limit block 42, and the threaded rod 41 is arranged in the limit groove 43 (which will be described below). In some other possible embodiments not shown in the drawings, the threaded rod 41 can also be threadedly connected to the movable part 33. Similarly, the limit groove 43 is used to limit the limit block 42, so as to drive the movable part 33 to move towards the support part 32 by rotating the threaded rod 41. The present disclosure is not limited thereto.

[0042] The driving mechanism 4 can be constructed in any suitable manner. In some exemplary embodiments, refer to Figure 3 and Figure 4 shown, the driving mechanism 4 can include a driving member 44, a driving gear 45 and a transmission gear 46. The transmission gear 46 is sleeved on the threaded rod 41 and is meshed with the driving gear 45. The driving member 44 is used to drive the driving gear 45 to rotate. In this way, by driving the driving gear 45 to rotate by the driving member 44, the driving gear 45 meshes with and drives the transmission gear 46 to rotate, and then the transmission gear 46 drives the threaded rod 41 to rotate, so as to realize the movement of the limit block 42 and the movable part 33. Among them, the driving member 44, the driving gear 45 and the transmission gear 46 are arranged above the base body 2 for easy installation. At the same time, the threaded rod 41 is arranged in the limit groove 43, and the top end of the threaded rod 41 passes through the base body 2 for installing the transmission gear 46.

[0043] In addition, in some other possible embodiments not shown in the drawings, the driving member 44 can be constructed as, for example, a handwheel or a driving motor, etc., or the driving mechanism 4 can include a driving motor, and the driving motor is drivingly connected to the threaded rod 41 to drive the threaded rod 41 to rotate. The present disclosure does not make specific limitations thereto.

[0044] In some embodiments, refer to Figure 3 and Figure 4As shown, the number of the limiting grooves 43 can be set to be multiple. The threaded rod 41 can be arranged in one of the limiting grooves 43, and guide rods 47 are arranged in the remaining limiting grooves 43. The guide rods 47 and the threaded rod 41 have the same extending direction. A guide block 48 corresponding to the guide rod 47 is connected to the movable part 33, and the guide rod 47 penetrates through the corresponding guide block 48. In this way, the guide rod 47 is used to guide the sliding of the guide block 48, so as to cooperate to improve the stability when the threaded rod 41 drives the movable part 33 to move. Exemplarily, the number of the limiting grooves 43 in the present disclosure is set to be three. Among them, the threaded rod 41 is arranged in the middle limiting groove 43, and guide rods 47 are arranged in the limiting grooves 43 on both sides. Therefore, two guide blocks 48 are arranged on the movable part 33 to slidably connect to the guide rods 47 correspondingly.

[0045] It can be understood that the guide rod 47 can be exemplarily constructed as a square rod, and the guide block 48 can be exemplarily constructed as a square block. In some other possible alternative embodiments not shown in the drawings, the guide rod 47 can also be constructed as a polygonal rod or a columnar rod, and the guide block 48 can also be constructed as a polygonal block or a columnar block, as long as it does not prevent the normal movement of the movable part 33. The present disclosure does not make specific limitations on this.

[0046] In some embodiments, referring to Figure 1 and Figure 2 as shown, an installation cavity 21 can be arranged inside the base body 2. The flue gas waste heat heater 9 includes a first heat exchanger 5, a second heat exchanger 6, a liquid inlet pipe 7 and a liquid return pipe 8 arranged in the installation cavity 21. The liquid inlet pipe 7 is communicated with the first heat exchange flow channel of the first heat exchanger 5 through a pump device 72. A valve structure 71 is arranged on the liquid inlet pipe 7. The first heat exchange flow channel of the first heat exchanger 5 is communicated with the first heat exchange flow channel of the second heat exchanger 6. The liquid return pipe 8 is communicated with the first heat exchange flow channel of the second heat exchanger 6. The other ends of the liquid inlet pipe 7 and the liquid return pipe 8 are respectively communicated with both ends of the heat exchange pipe in the flue gas denitration device 1;

[0047] The flue gas waste heat heater 9 further includes a heater 9 and a storage tank 10 for storing ammonia water. The storage tank 10 is sequentially communicated with the second heat exchange flow channels of the first heat exchanger 5 and the second heat exchanger 6. The heater 9 is communicated with the second heat exchange flow channel of the second heat exchanger 6 and the other side of the heater 9 is connected with a discharge pipe 91. The other end of the discharge pipe 91 is communicated with the inside of the flue gas denitration device 1 for transporting ammonia gas. Among them, a cover 101 is arranged on the storage tank 10 to reduce the volatilization of ammonia water, and the ammonia water in the storage tank 10 can be replenished by removing the cover 101.

[0048] In this way, the high-temperature liquid in the heat exchanger inside the flue gas denitration device 1 is made to flow through the liquid inlet pipe 7 by the pump device 72 and then input into the first heat exchange flow channels of the first heat exchanger 5 and the first heat exchange flow channels of the second heat exchanger 6. At this time, ammonia water flows in the second heat exchange flow channels of the first heat exchanger 5 and the second heat exchanger 6. This part of the high-temperature liquid exchanges heat with the ammonia water in the second heat exchange flow channel of the first heat exchanger 5 and the ammonia water in the second heat exchange flow channel of the second heat exchanger 6. Then, the ammonia water in the second heat exchange flow channel of the first heat exchanger 5 and the ammonia water in the second heat exchange flow channel of the second heat exchanger 6 that are heated up to generate ammonia gas are reheated inside the heater 9 so that the ammonia ions in the ammonia gas entering the heater 9 are completely converted into gas and are input into the inside of the flue gas denitration device 1 through the discharge pipe 91 for flue gas denitration.

[0049] In addition, the liquid after heat exchange in the first heat exchange flow channels of the first heat exchanger 5 and the heat exchange flow channels of the second heat exchanger 6 is input into the heat exchanger inside the flue gas denitration device 1 through the liquid return pipe 8 to continue heat exchange.

[0050] According to the second aspect of the present disclosure, a flue gas denitration system is provided, including a flue gas denitration device 1 and the flue gas waste heat heater 9 as above. This flue gas denitration system can reuse the heat generated inside the flue gas denitration device 1 through the flue gas waste heat heater 9 to reduce the hot end loss and improve the flue gas denitration effect.

[0051] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0052] In addition, it should be noted that, among the various specific technical features described in the above specific embodiments, without conflict, they can be combined in any suitable way. To avoid unnecessary repetition, the present disclosure will not further describe various possible combination methods.

[0053] Furthermore, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A flue gas waste heat heater for installation in a flue gas denitration device, characterized in that, Comprising: A substrate; And A fixing structure, including a fixing portion for connecting to the substrate and a supporting portion for connecting to the flue gas denitrification device. An installation groove is formed on the supporting portion, and the installation groove is used for at least part of the fixing portion to be inserted therein so that the flue gas waste heat heater is hung on the flue gas denitrification device.

2. The flue gas waste heat heater according to claim 1, wherein, The fixing structure further includes a movable portion for connecting to the substrate, a mating portion for connecting to the flue gas denitrification device, and a driving mechanism. The driving mechanism is used to drive the movable portion to move to abut against the mating portion to fix the flue gas waste heat heater to the flue gas denitrification device.

3. The flue gas waste heat heater according to claim 2, characterized in that, A plugging groove is formed on the mating portion, and the plugging groove is used for at least part of the movable portion to be inserted therein to limit and fix the movable portion.

4. The flue gas waste heat heater according to claim 3, characterized in that The plugging groove has a first inclined surface, and the movable portion has a second inclined surface. The first inclined surface and the second inclined surface are in contact and cooperate to guide the movable portion.

5. The flue gas waste heat heater according to claim 2, characterized in that The driving mechanism includes a threaded rod, a limiting block, and a limiting groove formed on the substrate. The limiting block is connected to the movable portion. The limiting groove is used for the limiting block to slide and limit the limiting block to follow the rotation of the threaded rod. The threaded rod is threadedly connected to the movable portion or the limiting block, and the threaded rod and the limiting groove have the same extending direction.

6. The flue gas waste heat heater according to claim 5, characterized in that The driving mechanism includes a driving member, a driving gear, and a transmission gear. The transmission gear is sleeved on the threaded rod and is meshed and connected to the driving gear. The driving member is used to drive the driving gear to rotate.

7. The flue gas waste heat heater according to claim 5, characterized in that, The number of the limiting grooves is set to be multiple. The threaded rod is arranged in one of the limiting grooves, and guiding rods are arranged in the remaining limiting grooves. The guiding rods and the threaded rod have the same extending direction. A guiding block corresponding to the guiding rod is connected to the movable portion, and the guiding rod penetrates through the corresponding guiding block.

8. The flue gas waste heat heater according to claim 1, characterized in that, The installation groove has a third inclined surface, and the fixing portion has a fourth inclined surface. The third inclined surface and the fourth inclined surface are in contact and cooperate to guide the fixing portion.

9. The flue gas waste heat heater according to claim 1, characterized in that, An installation cavity is arranged inside the substrate. The flue gas waste heat heater includes a first heat exchanger, a second heat exchanger, a liquid inlet pipe, and a liquid return pipe arranged in the installation cavity. The liquid inlet pipe is communicated with a first heat exchange flow channel of the first heat exchanger through a pump device. A valve structure is arranged on the liquid inlet pipe. The first heat exchange flow channel of the first heat exchanger is communicated with the first heat exchange flow channel of the second heat exchanger. The liquid return pipe is communicated with the first heat exchange flow channel of the second heat exchanger. The other ends of the liquid inlet pipe and the liquid return pipe are respectively communicated with both ends of a heat exchange pipe inside the flue gas denitrification device; The flue gas waste heat heater further includes a heater and a storage tank for storing ammonia water. The storage tank is sequentially communicated with a second heat exchange flow channel of the first heat exchanger and a second heat exchange flow channel of the second heat exchanger. The heater is communicated with the second heat exchange flow channel of the second heat exchanger, and the other side of the heater is connected with a discharge pipe. The other end of the discharge pipe is communicated with the inside of the flue gas denitrification device to be used for conveying ammonia gas.

10. A flue gas denitrification system, characterized in that, Including a flue gas denitrification device and the flue gas waste heat heater according to any one of claims 1-9.

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