Mounting structure of heat exchange pipeline in boiler and boiler denitration system

Abstract

The utility model provides a mounting structure of a heat exchange pipeline in a boiler and a boiler denitration system. The mounting structure of the heat exchange pipeline in the boiler comprises the heat exchange pipeline, a hanging frame and a hanging rope, the hanging frames are installed at the top of the heat exchange pipeline, and the multiple hanging frames are arranged in the arrangement direction of the heat exchange pipeline at intervals. The hanging rope extends in the vertical direction, the lower end of the hanging rope is installed on the top of the hanging frame, and the upper end of the hanging rope is installed on the inner boiler wall of the boiler hearth. The hanging frame is installed at the top of the heat exchange pipeline, the hanging frame is connected with the inner boiler wall of the boiler hearth through the hanging rope, and therefore the heat exchange pipeline is hung in the boiler hearth through the hanging rope and the hanging frame, and the problem that the heat exchange pipeline is prone to deformation and loosening due to thermal expansion and cold contraction of the heat exchange pipeline and the boiler hearth is solved.

Description

Technical Field

[0001] The utility model embodiment relates to the technical field of denitration equipment, and in particular to an installation structure of a heat exchange pipe in a furnace and a boiler denitration system. Background Art

[0002] Nitrogen oxides (NO) in flue gas from coal-fired power plants x ) is one of the main air pollutants. Currently, the selective catalytic reduction technology (SCR) is mainly used to control the emission of nitrogen oxides in flue gas, that is, the reducing agent is used to selectively react with nitrogen oxides in flue gas to generate non-toxic and non-polluting nitrogen (N2) and water (O2) to achieve the purpose of denitrification and environmental protection. The commonly used reducing agents in the denitrification system are liquid ammonia, ammonia water and urea solution. Urea is selected as a reducing agent because of its high safety, wide source, easy transportation and storage. It has been widely used in the field of environmental protection. Its working principle is to pyrolyze urea solution into ammonia through a pyrolysis device, send it to the SCR reactor, and then undergo a chemical reduction reaction to achieve the purpose of denitrification and environmental protection.

[0003] Patent CN207430006U discloses a boiler flue gas denitrification device, which places a heat exchange pipe in the boiler furnace, and transports gas through a cold air blower at one end, and uses the heat exchange pipe to treat the air as a heat source for subsequent pyrolysis and SCR reactions. Most of the heat exchange pipes are fixed to the inner furnace wall of the boiler furnace by pipe clamps, and the thermal expansion and contraction of the heat exchange pipes and the boiler furnace easily cause deformation and loosening of the heat exchange pipes. Utility Model Content

[0004] The purpose of the embodiment of the utility model is to provide an installation structure for heat exchange pipes in a furnace and a boiler denitration system, aiming to solve the problem that the existing installation method of heat exchange pipes in the furnace of a boiler easily causes deformation and loosening of the heat exchange pipes.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides an installation structure of a heat exchange pipe in a furnace, which is used to be installed in a boiler furnace. The installation structure of the heat exchange pipe in the furnace includes:

[0006] Heat exchange pipes;

[0007] A hanging rack, the hanging rack being installed on the top of the heat exchange pipe, and a plurality of the hanging racks being arranged at intervals along the layout direction of the heat exchange pipe;

[0008] A hanging rope is arranged to extend in an up-down direction, a lower end of the hanging rope is installed on the top of the hanging frame, and an upper end of the hanging rope is installed on the inner furnace wall of the boiler furnace.

[0009] A hanging bracket is installed on the top of the heat exchange pipe of the utility model, and the hanging bracket is connected to the inner furnace wall of the boiler furnace through a hanging rope, so that the heat exchange pipe is hung in the boiler furnace through the hanging rope and the hanging bracket, thus avoiding the problem of deformation and loosening of the heat exchange pipe caused by thermal expansion and contraction of the heat exchange pipe and the boiler furnace.

[0010] Preferably, in the installation structure of the heat exchange pipe in the furnace, the heat exchange pipe comprises a hot air header pipe and a cold air header pipe arranged in parallel, and the hot air header pipe and the cold air header pipe are arranged horizontally and spaced apart;

[0011] A plurality of the hanging brackets are arranged at intervals along the extension direction of the hot air header pipe, and the bottom of each hanging bracket is connected to the hot air header pipe and the cold air header pipe.

[0012] Preferably, in the installation structure of the heat exchange pipe in the furnace, the hanging bracket includes:

[0013] Two connecting lugs, the two connecting lugs are respectively installed on the hot air header pipe and the cold air header pipe;

[0014] Two hanging link plates, the lower ends of the two hanging link plates can be rotatably connected to the two connecting ears along the axis in the extension direction of the hot air header pipe;

[0015] A hanging seat, the upper ends of the two hanging link plates can be rotatably connected to the two ends of the hanging seat along the axis in the extension direction of the hot air header pipe, and the lower end of the hanging rope is installed on the hanging seat.

[0016] Preferably, in the installation structure of the heat exchange pipe in the furnace, the connecting ear includes an arc plate and a first ear plate, the arc plate is installed on the outer tube wall of the hot air header pipe or the cold air header pipe, the first ear plate is upright installed on the upper plate surface of the arc plate, the first ear plate is rotatably connected to the lower end of the hanging link plate, and each of the hanging link plates is respectively provided with two first ear plates on both sides of the extension direction of the hot air header pipe.

[0017] Preferably, in the installation structure of the heat exchange pipe in the furnace, the hanging seat includes a connecting plate and a second ear plate, the lower end of the hanging rope is installed on the upper plate surface of the connecting plate, and the second ear plate is upright installed on the lower plate surface of the connecting plate. The two ends of the connecting plate corresponding to the two hanging link plates are each provided with the second ear plate, each of the second ear plates is rotatably connected to the upper end of a corresponding hanging link plate, and each of the hanging link plates is respectively provided with two second ear plates on both sides of the extension direction of the hot air header pipe.

[0018] Preferably, in the installation structure of the heat exchange pipe in the furnace, two of the hanging ropes are respectively installed at both ends of the hanging rack in the spacing direction between the hot air header pipe and the cold air header pipe.

[0019] Preferably, in the installation structure of the heat exchange pipe in the furnace, the installation structure of the heat exchange pipe in the furnace also includes a bracket, and the bracket is erected between the hot air header pipe and the cold air header pipe, and the hot air header pipe and the cold air header pipe both form a snap-fit ​​with the bracket in the radial direction of the hot air header pipe.

[0020] Preferably, in the installation structure of the heat exchange pipe in the furnace, the bracket includes:

[0021] A connecting beam, the connecting beam extending along the spacing direction of the hot air header pipe and the cold air header pipe, the connecting beam being located on the upper side of the hot air header pipe and the cold air header pipe;

[0022] A first clamping leg, the first clamping leg is extended in the up-down direction, the upper end of the first clamping leg is connected to the connecting beam, two first clamping legs are provided, and the two first clamping legs are respectively abutted against two sides of the hot air header pipe in the radial direction;

[0023] The second clamping leg is extended in the up-down direction, the upper end of the second clamping leg is connected to the connecting beam, two second clamping legs are provided, and the two second clamping legs are respectively abutted against two sides of the cold air header pipe in the radial direction.

[0024] Preferably, in the installation structure of the heat exchange pipe in the furnace, a plurality of the brackets are arranged at intervals along the extending direction of the hot air header pipe.

[0025] Preferably, in the installation structure of the heat exchange pipe in the furnace, the bracket is arranged between any two adjacent hanging racks.

[0026] In order to achieve the above object, the utility model also provides a boiler denitration system, comprising:

[0027] boiler furnace;

[0028] The installation structure of the heat exchange pipe in the furnace is the above-mentioned installation structure of the heat exchange pipe in the furnace, and the installation structure of the heat exchange pipe in the furnace is installed in the boiler furnace. The upper end of the hanging rope in the installation structure of the heat exchange pipe in the furnace is installed on the inner furnace wall of the boiler furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0030] Figure 1 This is a structural schematic diagram of the installation structure of the heat exchange pipe in the furnace in the embodiment of the utility model;

[0031] Figure 2 for Figure 1 A schematic diagram of a portion of the structure of the installation structure of the heat exchange pipe in the middle furnace;

[0032] Figure 3 for Figure 2 Structural diagram of the middle hanging bracket and hanging rope;

[0033] Figure 4 for Figure 2 Schematic diagram of the structure of the middle bracket;

[0034] Figure 5 It is a schematic structural diagram of a boiler denitration system in an embodiment of the utility model.

[0035] Description of the figures of the utility model:

[0036] Boiler denitration system 1000, installation structure 100 of heat exchange pipe in furnace, heat exchange pipe 1, hot air header pipe 11, cold air header pipe 12, serpentine pipe 13, hanging rack 2, connecting ear 21, arc plate 211, first ear plate 212, hanging link plate 22, hanging seat 23, connecting plate 231, second ear plate 232, hanging rope 3, bracket 4, connecting beam 41, first clamping leg 42, second clamping leg 43, boiler furnace 200, air inlet pipe 310, air outlet pipe 320, flue gas exhaust pipe 330 in furnace, air outlet pipe 340, exhaust pipe 350, pyrolyzer 400, SCR reactor 500.

[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0041] The utility model provides an installation structure for a heat exchange pipe in a furnace, which can be used in a boiler denitration system. The installation structure for the heat exchange pipe in the furnace can be installed in a boiler furnace of the boiler denitration system. Figures 1 to 4 The figure shows a preferred embodiment of the installation structure of the heat exchange pipe in the furnace provided by the utility model. Figure 5 A preferred embodiment of the boiler denitration system provided by the utility model is shown.

[0042] See also Figures 1 to 4 In this embodiment, the installation structure 100 of the heat exchange pipe in the furnace includes a heat exchange pipe 1, a hanging rack 2 and a hanging rope 3. The hanging rack 2 is installed on the top of the heat exchange pipe 1, and multiple hanging racks 2 are arranged at intervals along the layout direction of the heat exchange pipe 1; the hanging rope 3 is extended in the up and down directions, the lower end of the hanging rope 3 is installed on the top of the hanging rack 2, and the upper end of the hanging rope 3 is installed on the inner furnace wall of the boiler furnace 200.

[0043] Specifically, see Figure 5 The heat exchange pipe 1 is usually installed in the top of the boiler furnace 200. Optionally, in this embodiment, the heat exchange pipe 1 is located in an area in the boiler furnace 200 where the temperature is not less than 450 degrees. The top of the heat exchange pipe 1 and the bottom of the hanging bracket 2 can be fixedly connected by welding or the like, so that the hanging bracket 2 is fixedly installed on the top of the heat exchange pipe 1. And a plurality of hanging brackets 2 are arranged at intervals along the layout direction of the heat exchange pipe 1, so that a plurality of hanging brackets 2 are fixedly installed on the top of the heat exchange pipe 1, wherein the layout direction of the heat exchange pipe 1 is usually the length direction of the heat exchange pipe 1.

[0044] A hanging rope 3 is installed on the top of the hanging bracket 2, and the hanging rope 3 can be used normally in the high temperature environment of the installation area of ​​the heat exchange pipe 1 in the boiler furnace 200. The upper end and the lower end of the hanging rope 3 are fixedly connected to the hanging bracket 2 and the inner furnace wall of the boiler furnace 200, respectively, so that the heat exchange pipe 1 is hung in the boiler furnace 200 through the hanging rope 3 and the hanging bracket 2. Among them, each hanging bracket 2 is usually equipped with a plurality of hanging ropes 3 at intervals along the width direction of the heat exchange pipe 1.

[0045] A hanging bracket 2 is installed on the top of the heat exchange pipe 1 of the utility model, and the hanging bracket 2 is connected to the inner furnace wall of the boiler furnace 200 through a hanging rope 3, so that the heat exchange pipe 1 is hung in the boiler furnace 200 through the hanging rope 3 and the hanging bracket 2, thereby avoiding the problem of deformation and loosening of the heat exchange pipe 1 caused by thermal expansion and contraction between the heat exchange pipe 1 and the boiler furnace 200.

[0046] The specific style of the heat exchange pipe 1 can be set according to the actual situation. Figures 1 to 4 In this embodiment, the heat exchange pipe 1 includes a hot air header pipe 11 and a cold air header pipe 12 arranged in parallel, and the hot air header pipe 11 and the cold air header pipe 12 are arranged horizontally at intervals; a plurality of hanging racks 2 are arranged at intervals along the extension direction of the hot air header pipe 11, and the bottom of each hanging rack 2 is connected to the hot air header pipe 11 and the cold air header pipe 12.

[0047] Specifically, the hot air header pipe 11 and the cold air header pipe 12 are usually straight pipes, the extension direction of the hot air header pipe 11 and the cold air header pipe 12 is the length direction of the heat exchange pipe 1, and the spacing direction of the hot air header pipe 11 and the cold air header pipe 12 is the width direction of the heat exchange pipe 1. The bottom of the cold air header pipe 12 is connected to the bottom of the hot air header pipe 11 through a serpentine pipe 13, one end of the cold air header pipe 12 is provided with an inlet of the heat exchange pipe 1, and one end of the hot air header pipe 11 is provided with an outlet of the heat exchange pipe 1.

[0048] The hanging bracket 2 is installed between the hot air header pipe 11 and the cold air header pipe 12. The bottom of the hanging bracket 2 is fixedly connected to the top of the hot air header pipe 11 and the top of the cold air header pipe 12 at both ends in the width direction of the heat exchange pipe 1.

[0049] The specific style of the hanging bracket 2 can be set according to the actual situation. Figures 1 to 4In this embodiment, the hanging frame 2 includes two connecting ears 21, two hanging link plates 22, and a hanging seat 23. The two connecting ears 21 are respectively installed on the hot air header pipe 11 and the cold air header pipe 12; the lower ends of the two hanging link plates 22 can be rotatably connected to the two connecting ears 21 along the axis in the extension direction of the hot air header pipe 11; the upper ends of the two hanging link plates 22 can be rotatably connected to the two ends of the hanging seat 23 along the axis in the extension direction of the hot air header pipe 11, and the lower end of the hanging rope 3 is installed on the hanging seat 23.

[0050] Specifically, two connecting lugs 21 are fixedly installed on the top of the hot air header pipe 11 and the cold air header pipe 12, respectively, and the two connecting lugs 21 are respectively connected to the two ends of the hanging seat 23 in the width direction of the heat exchange pipe 1 through two hanging link plates 22. Since each hanging link plate 22 can rotate relative to a corresponding connecting lug 21 and the hanging seat 23, a movable margin is reserved between the hot air header pipe 11 and the cold air header pipe 12, between the hot air header pipe 11 and the inner furnace wall of the boiler furnace 200, and between the cold air header pipe 12 and the inner furnace wall of the boiler furnace 200, thereby avoiding the problem that the heat exchange pipe 1 is easily deformed and loosened due to the thermal expansion and contraction of the heat exchange pipe 1 and the boiler furnace 200.

[0051] The hanging bracket 2 is fixedly connected to the hot air header pipe 11 and the cold air header pipe 12 respectively through two connecting ears 21. The specific style of the connecting ears 21 can be set according to actual conditions. Figures 1 to 4 In this embodiment, the connecting ear 21 includes an arc plate 211 and a first ear plate 212. The arc plate 211 is installed on the outer tube wall of the hot air header pipe 11 or the cold air header pipe 12. The first ear plate 212 is upright installed on the upper plate surface of the arc plate 211. The first ear plate 212 is rotatably connected to the lower end of the hanging link plate 22. Each hanging link plate 22 is respectively provided with two first ear plates 212 on both sides of the extension direction of the hot air header pipe 11.

[0052] Specifically, the shape of the hot air header pipe 11 and the shape of the cold air header pipe 12 are usually matched, that is, the diameter and length of the hot air header pipe 11 are equal or approximately equal to the diameter and length of the cold air header pipe 12. The shape of the curved plate 211 is usually matched to the shape of the hot air header pipe 11, so that the lower plate surface of the curved plate 211 can be closely attached to the outer tube walls of the hot air header pipe 11 and the cold air header pipe 12.

[0053] Two first ear plates 212 are fixedly installed on the upper plate surface of the arc plate 211 by welding or the like. The two first ear plates 212 are spaced apart in the length direction of the heat exchange pipe 1, and the two first ear plates 212 are rotatably connected to the lower end of the hanging link plate 22 by a pin shaft or the like. At the same time, the two first ear plates 212 can limit the installation of the hanging link plate 22 in the length direction of the heat exchange pipe 1.

[0054] The hanging frame 2 is fixedly connected to the hanging rope 3 through the hanging seat 23. The specific style of the hanging seat 23 can be set according to actual conditions. Figures 1 to 4 In this embodiment, the hanging seat 23 includes a connecting plate 231 and a second ear plate 232. The lower end of the hanging rope 3 is installed on the upper plate surface of the connecting plate 231, and the second ear plate 232 is uprightly installed on the lower plate surface of the connecting plate 231. The two ends of the connecting plate 231 correspond to the two hanging link plates 22 and are each provided with a second ear plate 232. Each second ear plate 232 is rotatably connected to the upper end of a corresponding hanging link plate 22, and each hanging link plate 22 is respectively provided with two second ear plates 232 on both sides of the extension direction of the hot air header pipe 11.

[0055] Specifically, four second ear plates 232 are fixedly installed on the lower plate surface of the connecting plate 231 by welding or the like, and two second ear plates 232 are fixedly installed at each end of the connecting plate 231 in the width direction of the heat exchange pipe 1 and are spaced apart in the length direction of the heat exchange pipe 1. The two second ear plates 232 located at each end of the hanging seat 23 are rotatably connected to the upper end of the hanging link plate 22 by a pin shaft or the like, and at the same time, the two second ear plates 232 can also limit the installation of the hanging link plate 22 in the length direction of the heat exchange pipe 1.

[0056] As described above, each hanging rack 2 is usually equipped with a plurality of hanging ropes 3. Figures 1 to 4 In this embodiment, the hanging frame 2 is respectively installed with two hanging ropes 3 at both ends in the spacing direction of the hot air header pipe 11 and the cold air header pipe 12. Each connecting plate 231 is respectively installed with two hanging ropes 3 at both ends in the width direction of the heat exchange pipe 1, and the lower ends of the two hanging ropes 3 are fixedly installed on the upper plate surface of the connecting plate 231.

[0057] Optionally, see Figures 1 to 4 In this embodiment, the installation structure 100 of the heat exchange pipe in the furnace also includes a bracket 4, which is arranged between the hot air header pipe 11 and the cold air header pipe 12. The hot air header pipe 11 and the cold air header pipe 12 are snap-fitted with the bracket 4 in the radial direction of the hot air header pipe 11.

[0058] Specifically, a snap fit is formed between the bracket 4 and the cold air header pipe 12, as well as between the bracket 4 and the hot air header pipe 11 in the width direction of the heat exchange pipe 1. In this way, through the setting of the bracket 4, the hot air header pipe 11 and the cold air header pipe 12 can be kept in a parallel state.

[0059] The bracket 4 is usually provided with a plurality of brackets at intervals along the extension direction of the hot air header pipe 11. Figures 1 to 4 In this embodiment, one or more brackets 4 are arranged between any two adjacent hanging racks 2 .

[0060] The specific style of the bracket 4 can be set according to the actual situation. Figures 1 to 4 In the present embodiment, the bracket 4 comprises a connecting beam 41, a first clamping leg 42 and a second clamping leg 43. The connecting beam 41 is extended along the spacing direction between the hot air header pipe 11 and the cold air header pipe 12, and the connecting beam 41 is located on the upper side of the hot air header pipe 11 and the cold air header pipe 12; the first clamping leg 42 is extended along the up-down direction, the upper end of the first clamping leg 42 is connected to the connecting beam 41, two first clamping legs 42 are provided, and the two first clamping legs 42 are respectively abutted against the two sides of the hot air header pipe 11 in the radial direction; the second clamping leg 43 is extended along the up-down direction, the upper end of the second clamping leg 43 is connected to the connecting beam 41, two second clamping legs 43 are provided, and the two second clamping legs 43 are respectively abutted against the two sides of the cold air header pipe 12 in the radial direction.

[0061] Specifically, the bracket 4 clamps the hot air header pipe 11 from both sides in the width direction of the heat exchange pipe 1 through the two first clamping legs 42, and at the same time, a telescopic margin is reserved in the axial direction for the hot air header pipe 11. Similarly, the bracket 4 clamps the cold air header pipe 12 from both sides in the width direction of the heat exchange pipe 1 through the two second clamping legs 43, and at the same time, a telescopic margin is reserved in the axial direction for the cold air header pipe 12.

[0062] The utility model also provides a boiler denitration system. Figure 5 A preferred embodiment of the boiler denitration system provided by the utility model is shown.

[0063] See also Figure 5 In this embodiment, the boiler denitrification system 1000 includes an installation structure 100 for the heat exchange pipe in the furnace and a boiler furnace 200. The installation structure 100 for the heat exchange pipe in the furnace is installed in the boiler furnace 200, and the upper end of the hanging rope 3 in the installation structure 100 for the heat exchange pipe in the furnace is installed on the inner furnace wall of the boiler furnace 200.

[0064] Specifically, since the installation structure 100 of the heat exchange pipe in the furnace adopts the technical solution of the above embodiment, it has the beneficial effects brought by the technical solution of the above embodiment.

[0065] Optionally, see Figure 5 In this embodiment, the boiler denitrification system 1000 also includes a pyrolyzer 400 and an SCR reactor 500. The outlet of the heat exchange pipe 1 is connected to the top of the pyrolyzer 400 through the air outlet pipe 320, the bottom of the boiler furnace 200 is connected to the top of the SCR reactor 500 through the flue gas exhaust pipe 330 in the furnace, the bottom of the pyrolyzer 400 is connected to the flue gas exhaust pipe 330 in the furnace through the air outlet pipe 340, the bottom of the SCR reactor 500 is connected to the exhaust pipe 350, and the inlet of the heat exchange pipe 1 is connected to the exhaust pipe 350 through the air intake pipe 310.

[0066] The above are only preferred embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A furnace heat exchange pipe installation structure, used for installation in a boiler furnace, characterized in that: The installation structure of the heat exchange pipe in the furnace includes: Heat exchange pipes; A hanging rack, the hanging rack being installed on the top of the heat exchange pipe, and a plurality of the hanging racks being arranged at intervals along the layout direction of the heat exchange pipe; A hanging rope is arranged to extend in an up-down direction, a lower end of the hanging rope is installed on the top of the hanging frame, and an upper end of the hanging rope is installed on the inner furnace wall of the boiler furnace.

2. The installation structure of the heat exchange pipe in the furnace according to claim 1, characterized in that: The heat exchange pipeline comprises a hot air header pipe and a cold air header pipe arranged in parallel, and the hot air header pipe and the cold air header pipe are arranged horizontally and spaced apart; A plurality of the hanging brackets are arranged at intervals along the extension direction of the hot air header pipe, and the bottom of each hanging bracket is connected to the hot air header pipe and the cold air header pipe.

3. The installation structure of the heat exchange pipe in the furnace according to claim 2, characterized in that: The hanging rack comprises: Two connecting lugs, the two connecting lugs are respectively installed on the hot air header pipe and the cold air header pipe; Two hanging link plates, the lower ends of the two hanging link plates can be rotatably connected to the two connecting ears along the axis in the extension direction of the hot air header pipe; A hanging seat, the upper ends of the two hanging link plates can be rotatably connected to the two ends of the hanging seat along the axis in the extension direction of the hot air header pipe, and the lower end of the hanging rope is installed on the hanging seat.

4. The installation structure of the heat exchange pipe in the furnace according to claim 3, characterized in that: The connecting ear includes an arc plate and a first ear plate, the arc plate is installed on the outer tube wall of the hot air header tube or the cold air header tube, the first ear plate is upright installed on the upper plate surface of the arc plate, the first ear plate is rotatably connected to the lower end of the hanging link plate, and each of the hanging link plates is respectively provided with two first ear plates on both sides of the extension direction of the hot air header tube.

5. The installation structure of the heat exchange pipe in the furnace according to claim 3, characterized in that: The hanging seat includes a connecting plate and a second ear plate, the lower end of the hanging rope is installed on the upper plate surface of the connecting plate, and the second ear plate is upright installed on the lower plate surface of the connecting plate. The two ends of the connecting plate corresponding to the two hanging link plates are provided with the second ear plates, each of the second ear plates is rotatably connected to the upper end of a corresponding hanging link plate, and each of the hanging link plates is provided with two second ear plates on both sides of the extension direction of the hot air collecting box pipe.

6. The installation structure of the heat exchange pipe in the furnace according to claim 2, characterized in that: The hanging frame is provided with two hanging ropes at two ends of the hot air header pipe and the cold air header pipe in the spacing direction.

7. The installation structure of the heat exchange pipe in the furnace according to any one of claims 2 to 6, characterized in that: The installation structure of the heat exchange pipe in the furnace also includes a bracket, which is erected between the hot air header pipe and the cold air header pipe. The hot air header pipe and the cold air header pipe are both snap-fitted with the bracket in the radial direction of the hot air header pipe.

8. The installation structure of the heat exchange pipe in the furnace according to claim 7, characterized in that: The support comprises: A connecting beam, the connecting beam extending along the spacing direction of the hot air header pipe and the cold air header pipe, the connecting beam being located on the upper side of the hot air header pipe and the cold air header pipe; A first clamping leg, the first clamping leg is extended in the up-down direction, the upper end of the first clamping leg is connected to the connecting beam, two first clamping legs are provided, and the two first clamping legs are respectively abutted against two sides of the hot air header pipe in the radial direction; The second clamping leg is extended in the up-down direction, the upper end of the second clamping leg is connected to the connecting beam, two second clamping legs are provided, and the two second clamping legs are respectively abutted against two sides of the cold air header pipe in the radial direction.

9. The installation structure of the heat exchange pipe in the furnace according to claim 7, characterized in that: A plurality of the brackets are arranged at intervals along the extension direction of the hot air header pipe; and / or, The bracket is arranged between any two adjacent hanging racks.

10. A boiler denitration system, characterized in that: include: boiler furnace; The installation structure of the heat exchange pipe in the furnace is the installation structure of the heat exchange pipe in the furnace as described in any one of claims 1 to 9, the installation structure of the heat exchange pipe in the furnace is installed in the boiler furnace, and the upper end of the hanging rope in the installation structure of the heat exchange pipe in the furnace is installed on the inner furnace wall of the boiler furnace.

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