Baffle adjustment assembly for heat exchange unit and heat exchange baffle

Abstract

The present invention relates to the technical field of heat exchanger baffles, in particular to a baffle adjustment component and a heat exchange baffle for a heat exchanger unit, comprising: a heat exchange component, including a heat exchanger, a transmission pipe and a heat exchange baffle; a synchronization component including a first air intake pipe and a second air intake pipe, an impeller and a second wheel hub; a temperature control component including a water spray plug, a first receiving groove and a second receiving groove. When a flow difference occurs in the impeller, the second wheel hub drives the low-speed impeller to rotate, and at the same time decelerates the high-speed impeller to achieve balanced air intake, ensure a constant air intake flow ratio, maintain a stable gas temperature, and meet the use requirements of the heat exchanger unit. The heat exchange baffle is movably arranged to scrape off surface ash when sliding along the transmission pipe, spray water for cooling according to the rotation speed of the second wheel hub, and adjust the number distribution of each heat exchange baffle to reduce the air intake. The heat exchange baffle includes a variety of structures to achieve the functions of guiding the flow of flue gas, enhancing the disturbance effect, increasing the surface area, and improving the heat exchange efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchanger baffles, in particular to a baffle adjustment component for a heat exchange unit and a heat exchange baffle. Background Art

[0002] There are a large number of equipment units in thermal power plants, among which heat exchanger units are a commonly used equipment unit in the field of thermal power generation. They are mainly used to improve the thermal efficiency of thermal power plants. Heat exchanger units can further improve the thermodynamic properties of steam. They are mainly used in large thermal power plants, especially in ultra-supercritical power generation systems. These systems require higher thermal efficiency and environmental protection performance. Being able to effectively meet these requirements has become an important direction for the development of modern thermal power generation technology.

[0003] The heat exchanger unit has high requirements for the gas temperature after reheating. The temperature must be constant and the fluctuation range must not exceed ±2% to ensure the reheating effect. In the flue gas recirculation link, it is necessary to symmetrically extract the flue gas in front of the air preheater and send it to the furnace cold ash hopper, and adjust the temperature through the heat exchange baffle in the heat exchanger to ensure that the aerodynamic field is suitable for combustion. By symmetrically extracting the flue gas in front of the air preheater and sending it to the furnace cold ash hopper, and then adjusting the temperature through the heat exchange baffle in the heat exchanger, the reheating temperature can be controlled, thereby optimizing the combustion process. However, the high-temperature flue gas contains a certain amount of dust and ash. These substances are deposited on the surface of the heat exchanger to form ash and slag. Ash and slag will reduce heat exchange efficiency, increase flow resistance, and affect the normal operation of the system.

[0004] The existing patent with authorization announcement number CN202869355U discloses a set of outlet flue gas temperature automatic adjustment heat exchanger, including a set of shell and tube heat exchanger, and a set of flue gas adjustment device is set in the flue gas outlet header. High-temperature flue gas enters the shell and tube heat exchanger, and the flue gas enters the shell and tube, and then enters the flue gas outlet header after heat exchange with the shell side cooling medium. According to the outlet flue gas temperature, the damper opening is automatically adjusted, thereby adjusting the number of heat exchange tubes to ensure that the outlet flue gas temperature is maintained at the design value and to ensure the stable operation of the heat exchanger.

[0005] However, the above technical solution cannot synchronously adjust the intake air flow rate to solve the problem at the source, and the heat exchange baffle is fixed and cannot make adaptive changes when the intake air flow rate changes, resulting in low heat exchange efficiency and unstable gas temperature after heat exchange. It cannot solve the problem of decreased thermal conductivity due to accumulation of impurities on the outer wall of the intake air flow and the tube body, and cannot achieve precise temperature control. Summary of the invention

[0006] In view of the above problems in the prior art, the present invention is proposed.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a baffle adjustment assembly for a heat exchanger unit, comprising: a heat exchange component, including a heat exchanger, a transmission pipe arranged in the heat exchanger and a heat exchange baffle slidably sleeved on the outer wall of the transmission pipe, the outer wall of the heat exchange baffle is clamped with a rotating column, the outer wall of the rotating column is provided with a spiral guide rail, and when the rotating column rotates, each of the heat exchange baffles is driven to approach or move away from the midpoint of the spiral guide rail; when the distance between each of the heat exchange baffles increases, the volume of each heat exchange chamber in the heat exchanger is controlled to increase.

[0008] A synchronization component, comprising a first air inlet pipe and a second air inlet pipe respectively arranged on the outer wall of the heat exchanger, an impeller and a second hub rotatably arranged in the first air inlet pipe and the second air inlet pipe, wherein the second hub causes the first air inlet pipe and the second air inlet pipe to interlock and rotate synchronously when the speed difference between the two impellers exceeds a warning value;

[0009] The temperature control component includes a water spray plug movably embedded in the heat exchange baffle, a first receiving groove arranged in the middle of the outer wall of the rotating column, and a second receiving groove arranged on both sides of the outer wall of the rotating column. The heat exchange baffle located in the second receiving groove moves along the rotating column and moves into the first receiving groove.

[0010] As a preferred solution of the baffle adjustment assembly for the heat exchanger unit described in the present invention, the first air inlet pipe and the outer wall of the second air inlet pipe are connected to each other and a buffer cavity is provided, the impeller seal rotates in the buffer cavity, and a control shaft is provided at the center of the impeller.

[0011] As a preferred solution of the baffle adjustment assembly for the heat exchanger unit of the present invention, wherein: a first hub is provided at one end of the control shaft that rotates and penetrates the buffer cavity, a synchronous ring is also rotatably sleeved on the outer wall of the control shaft, a bracket is provided on the synchronous ring, and a second hub is rotatably provided on the bracket;

[0012] The outer walls of the first hub and the second hub are both provided with long strips in a circumferential array, and one end of the synchronizer ring is provided with a worm gear.

[0013] As a preferred solution of the baffle adjustment assembly for the heat exchanger unit of the present invention, wherein: a clamping ring is fixedly provided on the outer wall of the control shaft, a ratchet is provided in a circumferential array on the inner wall of the clamping ring, a disc is provided on the outer wall of the synchronization ring, a ratchet groove is provided in the disc, and a ratchet is rotatably provided in the ratchet groove;

[0014] A first elastic member is provided between the ratchet pawl and the inner wall of the ratchet pawl groove. When the flow velocity difference between the first air intake pipe and the second air intake pipe exceeds a warning value, the ratchet pawl engages with the ratchet teeth.

[0015] As a preferred solution of the baffle adjustment assembly for the heat exchanger unit described in the present invention, an adjustment groove is opened on the heat exchange baffle, a slider is provided on the inner wall of the adjustment groove, the slider is slidably arranged on the inner wall of the spiral guide rail, a reference groove is provided at the center position of the rotating column, and there are two spiral guide rails in total and they are symmetrically distributed about the reference groove.

[0016] As a preferred solution of the baffle adjustment assembly for the heat exchanger unit of the present invention, wherein: a truncated cone groove is opened on the heat exchange baffle, a water pipe is arranged in the heat exchanger, and the water spray plug is fixedly arranged on the outer wall of the water pipe and communicated with the water pipe;

[0017] A connecting rod is sleeved on one end of the worm gear, and a transmission member is provided at the end of the connecting rod. The connecting rod drives the rotating column to rotate through the transmission member, and the heat exchange baffle is also rotatably provided in the reference groove.

[0018] As a preferred solution of the baffle adjustment assembly for the heat exchanger unit of the present invention, wherein: a spare heat exchange baffle is slidably provided in the second receiving groove, a push rod is slidably provided on the inner wall of the heat exchanger, a push plate is provided at the end of the push rod, and the push plate is movably fitted on the outer wall of the heat exchange baffle;

[0019] The outer wall sliding sleeve of the push rod is provided with a second elastic member, and two ends of the second elastic member are respectively in contact with the heat exchange baffle and the inner wall of the heat exchanger.

[0020] A heat exchange baffle is applied to the above-mentioned baffle adjustment component for a heat exchange unit. The surface of the heat exchange baffle is provided with spiral patterns, and the surface of the heat exchange baffle is also designed with wavy patterns.

[0021] The heat exchange baffle is arc-shaped, and the edge of the heat exchange baffle is designed to be serrated.

[0022] The outer wall of the heat exchange baffle is provided with protrusions, and the protrusions are in a granular, strip or corrugated shape.

[0023] The beneficial effects of the present invention are as follows: the intake air flow is reflected by the impeller speed. When a flow difference occurs, the second hub automatically drives the impeller on the side with a relatively slower rotation speed to rotate, and at the same time, the impeller on the side with a relatively faster rotation speed is decelerated, thereby achieving a balanced intake function and ensuring that the intake air flow ratio remains constant, thereby obtaining a heat exchange gas with a stable temperature and meeting the use requirements of the heat exchanger unit. The heat exchange baffle is movably arranged, and the ash on its surface can be scraped off while sliding along the transmission pipe, thereby improving the heat conduction effect and the heat exchange efficiency. At the same time, water can be sprayed for cooling according to the rotation degree of the second hub, and the number and chamber size of each heat exchange baffle can be adjusted to increase the hot air contact area. At the same time, the gas pressure in the heat exchanger can be increased, the intake volume can be reduced, and the heat exchange efficiency can be improved. The heat exchange baffle includes a variety of structures, such as spiral patterns, wavy patterns, and serrated edges. Features of different sizes and specifications are designed according to different requirements of the use scenarios, thereby achieving the functions of guiding the flue gas flow, enhancing the disturbance effect, increasing the surface area, and improving the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0025] Figure 1 This is an overall schematic diagram of a baffle adjustment assembly for a heat exchange unit of the present invention;

[0026] Figure 2 It is a schematic diagram of the heat exchanger structure in the present invention;

[0027] Figure 3 For the present invention Figure 2 The enlarged schematic diagram at A in the middle;

[0028] Figure 4 It is a schematic diagram of the structure of the synchronization component in the present invention;

[0029] Figure 5 Schematic diagram of the position of the ratchet and pawl in the present invention;

[0030] Figure 6 It is a schematic diagram of the connection relationship between the rotating column and the heat exchange baffle in the present invention;

[0031] Figure 7 For the present invention Figure 6 The enlarged schematic diagram at C in the middle;

[0032] Figure 8 For the present invention Figure 6 The enlarged schematic diagram at D in the middle;

[0033] Fig. 9 For the present invention Figure 6 Enlarged schematic diagram at point E in the middle.

[0034] Reference numerals: 100, heat exchanger; 1001, adjustment groove; 1002, slider; 1003, reference groove; 1004, truncated cone groove; 1005, water pipe; 1006, connecting rod; 1007, transmission member; 1008, push rod; 1009, push plate; 101, transmission pipe; 1011, second elastic member; 102, heat exchange baffle; 103, rotating column; 104, spiral guide rail;

[0035] first air intake pipe; 2001, buffer chamber; 2002, control shaft; 2003, first wheel hub; 2004, synchronizing ring; 2005, bracket; 2006, strip; 2007, worm gear; 2008, second wheel hub; 2009, snap ring; 201, second air intake pipe; 2011, ratchet; 2012, disc; 2013, pawl; 2014, pawl groove; 2018, first elastic member; 202, impeller;

[0036] 300. Water spray plug; 301. First receiving groove; 302. Second receiving groove. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0038] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0040] Example 1

[0041] Reference Figure 1 to Figure 8, which is the first embodiment of the present invention, provides a baffle adjustment component for a heat exchanger unit, including a heat exchange component, a synchronization component and a temperature control component. The intake flow rate is reflected by the rotation speed of the impeller 202. When a flow difference occurs, the low-speed impeller 202 is automatically driven to rotate by the second hub 2008, and the high-speed impeller 202 is decelerated at the same time, thereby achieving a balanced intake function and ensuring that the intake flow ratio remains constant, thereby obtaining a heat exchange gas with a stable temperature to meet the use requirements of the heat exchanger unit.

[0042] Specifically, a baffle adjustment assembly for a heat exchange unit includes:

[0043] The heat exchange component includes a heat exchanger 100, a transmission pipe 101 disposed in the heat exchanger 100, and a heat exchange baffle 102 slidably sleeved on the outer wall of the transmission pipe 101. A rotating column 103 is clamped on the outer wall of the heat exchange baffle 102. A spiral guide rail 104 is opened on the outer wall of the rotating column 103. When the rotating column 103 rotates, each heat exchange baffle 102 is driven to approach or move away from the midpoint of the spiral guide rail 104.

[0044] The synchronization component includes a first air intake pipe 200 and a second air intake pipe 201 respectively arranged on the outer wall of the heat exchanger 100, an impeller 202 rotatably arranged in the first air intake pipe 200 and the second air intake pipe 201, and a second hub 2008. When the speed difference between the two impellers 202 exceeds a speed warning value, the second hub 2008 enables the first air intake pipe 200 and the second air intake pipe 201 to be interlocked and rotate synchronously; the speed warning value is set by a technician in this field according to actual conditions.

[0045] The temperature control component includes a water spray plug 300 movably embedded in the heat exchange baffle 102, a first receiving groove 301 arranged in the middle of the outer wall of the rotating column 103, and a second receiving groove 302 arranged on both sides of the outer wall of the rotating column 103. The heat exchange baffle 102 located in the second receiving groove 302 moves along the rotating column 103 and moves into the first receiving groove 301.

[0046] The first air inlet pipe 200 and the second air inlet pipe 201 are connected to each other on the outer wall thereof and a buffer chamber 2001 is provided. The impeller 202 is sealed and rotatably arranged in the buffer chamber 2001 . A control shaft 2002 is provided at the center of the impeller 202 .

[0047] Preferably, the impeller 202 is eccentrically arranged between the first air inlet pipe 200 and the second air inlet pipe 201, and a seal is arranged between the impeller 202 and the first air inlet pipe 200 and the second air inlet pipe 201 to prevent air leakage. When the gas flows, the blades of the impeller 202 are driven to rotate, so that the gas flow rate is measured according to the blade rotation speed.

[0048] Among them, the buffer chamber 2001 is a cylindrical chamber body, the impeller 202 is rotatably arranged at the axial position of the buffer chamber 2001, and the airflow flows out from the first air inlet pipe 200 and the second air inlet pipe 201 and passes through the upper and lower sides of the buffer chamber 2001 respectively, so that the impellers 202 at the two locations rotate in opposite directions, so that the two first hubs 2003 respectively connected to the first air inlet pipe 200 and the second air inlet pipe 201 rotate in opposite directions.

[0049] Among them, a first hub 2003 is provided at one end of the control shaft 2002 that rotates and passes through the buffer cavity 2001, and a synchronous ring 2004 is also rotatably sleeved on the outer wall of the control shaft 2002. A bracket 2005 is fixedly provided on the synchronous ring 2004, and a second hub 2008 is rotatably provided on the bracket 2005. The bracket 2005 is a door-shaped frame, and one end of the bracket 2005 is rotatably sleeved on the outer wall of the control shaft 2002 through a bearing, and the other end is rotatably provided with a second hub 2008 through a bearing, so that the axial direction of the second hub 2008 is perpendicular to the axial direction of the first hub 2003. At the same time, the second hub 2008 can also rotate slightly along the control shaft 2002 with the bracket 2005 as a whole, not exceeding 360°.

[0050] Preferably, the axes of the first hub 2003 and the second hub 2008 are vertically arranged, and the synchronizer ring 2004 and the bracket 2005 are respectively located on both sides of the synchronizer ring 2004, so that the bracket 2005 does not collide when the synchronizer ring 2004 rotates.

[0051] More preferably, the outer walls of the first hub 2003 and the second hub 2008 are provided with long strips 2006 in a circumferential array, and a worm gear 2007 is fixedly provided at one end of the synchronizer ring 2004. In the present embodiment, the worm gear 2007 is used to reverse the power on the synchronizer ring 2004. When encountering a situation where the transmission accuracy is relatively high, the implementer may use a bevel gear or other direction-changing transmission structure as a replacement in other embodiments.

[0052] Among them, the second hub 2008 is meshed and connected with the two first hubs 2003 through the long strip 2006 at the same time. When the rotation speeds of the first intake pipe 200 and the second intake pipe 201 are the same, the second hub 2008 is meshed at the same time and rotates relative to the bracket 2005. When there is a rotation speed difference between the two, the second hub 2008 and the bracket 2005 also rotate relative to each other around the control shaft 2002 at the same time. The greater the rotation speed difference, the faster the rotation speed of the synchronizer ring 2004 and the bracket 2005.

[0053] Furthermore, a retaining ring 2009 is fixedly provided on the outer wall of the control shaft 2002, a ratchet 2011 is provided in a circular array on the inner wall of the retaining ring 2009, a disc 2012 is provided on the outer wall of the synchronization ring 2004, a ratchet groove 2014 is opened in the disc 2012, and a ratchet 2013 is rotatably provided in the ratchet groove 2014. In the present embodiment, the retaining ring 2009 is only fixedly connected to the control shaft 2002 arranged on the first intake pipe 200.

[0054] Among them, when the disk 2012 is rotating at a low speed or in an initial stationary state, the pawl 2013 is pulled by the spring to shrink inside the pawl groove 2014. At this time, the disk 2012 maintains a low-speed rotation, and the rotation trajectory of the pawl 2013 does not intersect with the ratchet 2011. When the rotation speed of the disk 2012 exceeds a critical value, under the action of centrifugal force, the pawl 2013 swings outward in the pawl groove 2014, and the outermost trajectory of the pawl 2013 intersects with the ratchet 2011 and meshes with it. After the overspeed is restored to below the critical value, the pawl 2013 automatically rebounds.

[0055] More preferably, a first elastic member 2018 is provided between the pawl 2013 and the inner wall of the pawl groove 2014. When the flow velocity difference between the first air intake pipe 200 and the second air intake pipe 201 exceeds a flow velocity warning value, the pawl 2013 engages with the ratchet tooth 2011. The flow velocity warning value is set by technicians in this field according to actual conditions.

[0056] Among them, the first elastic member 2018 is a spring. In the initial state, the spring pulls the pawl 2013 close to the pawl groove 2014. When the speed of the disc 2012 increases due to the flow velocity difference, the centrifugal force of the pawl 2013 increases, so that it swings outward and engages with the ratchet 2011. The synchronizer ring 2004 rotates synchronously with the retaining ring 2009. At this time, a chain is formed between the upper and lower control shafts 2002, which rotate at the same angular velocity, and in turn adjust the intake flow rate through the rotation speed of the impeller 202, thereby realizing the adjustment of the flow rate in the intake pipes on both sides.

[0057] Exemplarily, the two first hubs 2003 respectively connected to the first intake pipe 200 and the second intake pipe 201 rotate in opposite directions, so that the second hub 2008 meshing with the two first hubs 2003 at the same time can simultaneously follow the two to rotate around the axis of the second hub 2008. When there is a positive speed difference between the two first hubs 2003, that is, when the flow rate in the first intake pipe 200 is greater than that in the second intake pipe 201, the second hub 2008 and the bracket 2005 revolve around the axis of the control shaft 2002. Similarly, when the gas flow rate in the second intake pipe 201 is greater than that of the first intake pipe 200, the second hub 2008 and the bracket 2005 revolve in the opposite direction around the axis of the control shaft 2002.

[0058] In summary, when in use, when the instantaneous flow velocity of the boiler tail gas in the first air inlet pipe 200 is too fast, the speed of the impeller 202 is increased, and a speed difference is formed with the impeller 202 in the second air inlet pipe 201, so that the speed difference between the two first hubs 2003 increases, and the second hub 2008 and the bracket 2005 rotate around the control shaft 2002 under the action of the speed difference. When the speed difference is greater than the speed warning value, the centrifugal force of the ratchet 2013 increases and it swings outward and meshes with the ratchet 211, and the snap ring 200 9 is locked with the synchronization ring 2004, so that the second hub 2008 cannot rotate relative to the control shaft 2002, and the faster first hub 2003 drives the slower first hub 2003 to rotate through the second hub 2008, so that the gas flow rates in the first intake pipe 200 and the second intake pipe 201 tend to be consistent, ensuring that the gas flow entering the heat exchanger 100 always maintains the set ratio, so that the gas temperature after heat exchange remains constant, meeting the use standard of the secondary reheat boiler.

[0059] Example 2

[0060] Reference Figure 1 to Figure 9 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment, but differs in that the heat exchange baffle 102 is movably arranged, and the ash on its surface can be scraped off while sliding along the transmission pipe 101, thereby improving the heat conduction effect and the heat exchange efficiency. At the same time, water can be sprayed for cooling according to the rotation degree of the second hub 2008, and the number and chamber size of each heat exchange baffle 102 can be adjusted to increase the hot air contact area. At the same time, the gas pressure in the heat exchanger 100 can be increased, the air intake can be reduced, and the heat exchange efficiency can be improved.

[0061] Specifically, an adjustment groove 1001 is opened on the heat exchange baffle 102, a slider 1002 is provided on the inner wall of the adjustment groove 1001, and the slider 1002 is slidably arranged on the inner wall of the spiral guide rail 104. A reference groove 1003 is provided at the center of the rotating column 103. There are two spiral guide rails 104 and they are symmetrically distributed about the reference groove 1003.

[0062] The heat exchange baffle 102 slides perpendicularly to the axis of the rotating column 103 and slides against the outer wall of the transmission pipe 101, and scrapes away the soot deposits on its surface while sliding, so as to prevent the accumulation of impurities from affecting heat transfer and reducing heat exchange efficiency.

[0063] More preferably, a truncated cone groove 1004 is formed on the heat exchange baffle 102, a water pipe 1005 is provided in the heat exchanger 100, and the water spray plug 300 is fixedly disposed on the outer wall of the water pipe 1005 and communicated therewith.

[0064] Preferably, the water spray plug 300 is a truncated cone-shaped soft silicone with spray holes on the surface, and the water spray plug 300 can be movably engaged in the truncated cone groove 1004. At this time, the spray holes are compressed and water cannot be sprayed out. When the heat exchange baffle 102 moves, the greater the moving distance, the more the number of leaking spray holes, and the higher the water spray cooling efficiency.

[0065] Furthermore, a connecting rod 1006 is sleeved on one end of the worm gear 2007 , and a transmission member 1007 is provided at the end of the connecting rod 1006 . The connecting rod 1006 drives the rotating column 103 to rotate through the transmission member 1007 , and a heat exchange baffle 102 is also rotatably provided in the reference groove 1003 .

[0066] Among them, in this embodiment, the transmission member 1007 includes a turntable mounted on the outer wall of the connecting rod 1006, the outer wall of the turntable has long strips 2006 in a circular array, the outer wall of the rotating column 103 also has long strips 2006 in a circular array, the connecting rod 1006 is vertically arranged to the rotating column 103, and the long strips 2006 thereon are also vertically meshed with each other, so that the rotating column 103 is driven to rotate by the rotation of the connecting rod 1006.

[0067] More preferably, a spare heat exchange baffle 102 is slidably provided in the second receiving groove 302 , a push rod 1008 is slidably provided on the inner wall of the heat exchanger 100 , a push plate 1009 is provided at the end of the push rod 1008 , and the push plate 1009 is movably fitted to the outer wall of the heat exchange baffle 102 .

[0068] Among them, the outer wall sliding sleeve of the push rod 1008 is provided with a second elastic member 1011, and the two ends of the second elastic member 1011 are respectively fitted with the heat exchange baffle 102 and the inner wall of the heat exchanger 100. In other embodiments, a spring can also be provided in the reference groove 1003. When the rotating column 103 rotates in the opposite direction, the heat exchange baffle 102 is pushed by the spring to pop out from the reference groove 1003 and slide onto the rotating column 103.

[0069] Preferably, the spare heat exchange baffle 102 always has a tendency to disengage from the second receiving groove 302 and enter the spiral guide rail 104 of the rotating column 103 under the push of the second elastic member 1011. Every time the spiral guide rail 104 of the rotating column 103 rotates one circle in the positive direction, a slider 1002 of a spare heat exchange baffle 102 enters the spiral guide rail 104 and moves toward the position of the reference groove 1003.

[0070] In summary, when the boiler exhaust gas flow in the first air inlet pipe 200 increases but the warning value cannot be triggered, it is necessary to fine-tune the heat exchange baffle 102 to achieve a balanced heat exchange effect. The exhaust gas entering the heat exchanger 100 flows along each heat exchange baffle 102 and exchanges heat with the clean air in the transmission pipe 101. Due to the speed difference, the worm gear 2007 and the connecting rod 1006 rotate and drive the rotating column 103 to rotate forward through the transmission member 1007. The slider 1002 slides inside the spiral guide rail 104, so that the heat exchange baffle 102 mounted on the outer wall of the transmission pipe 101 begins to move closer to the position of the reference groove 1003. While the heat exchange baffle 102 slides, the soot deposits on its surface are scraped to prevent impurities from accumulating and affecting heat transfer, thereby reducing heat exchange efficiency.

[0071] At the same time, each heat exchange baffle 102 moves toward the reference groove 1003, and the water spray plug 300 separates from the conical groove 1004, and the water flows from the water pipe 1005 to the water spray plug 300 and is sprayed to the tail gas chamber for cooling. When the flow rate difference is greater, the heat exchange baffle 102 moves a greater distance, so that the water spray amount is greater and the cooling force is greater, thereby adjusting the exhaust gas with a higher rate to the set temperature, avoiding a large amount of high-temperature exhaust gas from entering and causing the gas temperature after heat transfer to exceed the use standard.

[0072] Moreover, every time the rotating column 103 rotates one circle, under the push of the second elastic member 1011, a spare heat exchange baffle 102 slides into the spiral guide rail 104 and moves closer to the position of the reference groove 1003, thereby increasing the number of heat exchange baffles 102 and the contact area with the high-temperature air, thereby improving the heat exchange efficiency. At the same time, the air flow distance increases and the pressure in the heat exchanger 100 increases, making it difficult for the exhaust gas in the first intake pipe 200 to enter, thereby automatically reducing the intake volume, thereby avoiding a large amount of boiler exhaust gas from entering and causing the gas temperature after heat exchange to exceed the standard, ensuring that the gas temperature after heat exchange is constant, and meeting the use conditions of the secondary heat exchange boiler. When the gas flow rate in the second intake pipe 201 is greater than the boiler exhaust gas in the first intake pipe 200, the rotating column 103 rotates in the opposite direction, and the heat exchange baffle 102 moves in the opposite direction for adjustment. In specific implementation, the gas flow rate fluctuates and causes the heat exchange baffle 102 to be fine-tuned back and forth until a dynamic balance is reached, at which time the heat exchange efficiency can be guaranteed to be stable.

[0073] Example 3

[0074] Reference Figure 1-Figure 9 , which is the third embodiment of the present invention. The heat exchange baffle 102 in the present invention includes a variety of structures, such as spiral patterns, wavy patterns and serrated edges, etc., and features of different sizes and specifications are designed according to different requirements of usage scenarios, so as to achieve the functions of guiding the flow of flue gas, enhancing the disturbance effect, increasing the surface area and improving the heat exchange efficiency.

[0075] Specifically, the surface of the heat exchange baffle 102 is provided with spiral patterns to guide the flow of flue gas, enhance the disturbance effect, and improve the heat exchange efficiency. The surface of the heat exchange baffle 102 is also designed with wavy patterns to increase the surface area, enhance the heat exchange effect, and reduce the deposition of dirt. At the same time, it can increase turbulence, promote heat exchange, and improve surface cleanliness.

[0076] Exemplarily, spiral patterns are processed on the surface of the heat exchange baffle 102, and the spiral pitch and depth of the patterns are designed according to actual working conditions. Wave patterns are designed on the baffle surface, and the height and spacing of the wave crests and troughs are adjusted according to the outer diameter of the transmission pipe 101 and the fluid flow rate.

[0077] Preferably, the heat exchange baffle 102 is arc-shaped so that its contact with the transmission pipe 101 is closer, thereby improving the heat exchange effect. A serrated shape is designed on the edge of the baffle to enhance the disturbance of the fluid, increase turbulence, and improve the heat exchange efficiency. At the same time, a stepped structure is designed on the surface of the baffle to increase the surface area and improve the heat exchange efficiency.

[0078] Exemplarily, the heat exchange baffle 102 is an arc-shaped one that matches the outer diameter of the transmission pipe 101 to ensure full contact and improve the heat exchange effect. The edge of the heat exchange baffle 102 is designed to be serrated, and the height and spacing of each serration are optimized according to the fluid flow rate and heat exchange requirements.

[0079] Among them, the close contact between the arc baffle and the transmission pipe 101 increases the heat exchange area and improves the heat exchange efficiency. The serrated edge and stepped structure enhance the fluid disturbance and improve the heat exchange efficiency. At the same time, the scraping effect of the ash deposits on the surface of the transmission pipe 101 is improved, reducing dirt accumulation.

[0080] Furthermore, the outer wall of the heat exchange baffle 102 is provided with granular protrusions to increase surface roughness, promote turbulence, and improve heat exchange efficiency.

[0081] Among them, the granular protrusions can be replaced by surface-designed strip-shaped protrusions, similar to the fin structure, which increases the surface area and improves the heat exchange efficiency.

[0082] Preferably, the granular protrusions can also be replaced with corrugated protrusions to increase the surface area, enhance the disturbance effect, and improve the heat exchange efficiency.

[0083] Exemplarily, the diameter and height of the surface granular protrusions are designed according to the fluid flow rate and heat exchange requirements to ensure the best turbulence effect. The strip protrusions are designed to be strips perpendicular to the fluid flow direction, and the height and width of each protrusion are optimized according to the heat exchange requirements. The corrugated protrusions are designed to be periodic corrugations, and the height and spacing of each peak and trough are adjusted according to the fluid flow rate and heat exchange requirements.

[0084] The construction and arrangement of the present invention are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be changed or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0085] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A baffle adjustment assembly for a heat exchanger unit, characterized in that: include: A heat exchange component, comprising a heat exchanger (100), a transmission pipe (101) arranged in the heat exchanger (100), and a heat exchange baffle (102) slidably sleeved on the outer wall of the transmission pipe (101), wherein the outer wall of the heat exchange baffle (102) is provided with a rotating column (103), and the outer wall of the rotating column (103) is provided with a spiral guide rail (104), and when the rotating column (103) rotates, each of the heat exchange baffles (102) is driven to approach or move away from the midpoint of the spiral guide rail (104), and when the spacing between each of the heat exchange baffles (102) increases, the volume of each heat exchange chamber in the heat exchanger (100) is controlled to increase; A synchronization component, comprising a first air intake pipe (200) and a second air intake pipe (201) respectively arranged on the outer wall of the heat exchanger (100), an impeller (202) rotatably arranged in the first air intake pipe (200) and the second air intake pipe (201), and a second wheel hub (2008), wherein the second wheel hub (2008) causes the first air intake pipe (200) and the second air intake pipe (201) to interlock and rotate synchronously when the speed difference between the two impellers (202) exceeds a speed warning value; The first air inlet pipe (200) and the second air inlet pipe (201) are connected to each other with a buffer chamber (201) on their outer walls, the impeller (202) is sealed and rotatably arranged in the buffer chamber (2001), and a control shaft (2002) is provided at the center of the impeller (202); A first hub (2003) is provided at one end of the control shaft (2002) that rotatably passes through the buffer cavity (2001); a synchronizing ring (2004) is rotatably sleeved on the outer wall of the control shaft (2002); a bracket (2005) is provided on the synchronizing ring (2004); and a second hub (2008) is rotatably provided on the bracket (2005); The outer walls of the first hub (2003) and the second hub (2008) are both provided with long strips (2006) in a circumferential array, and a worm gear (2007) is provided at one end of the synchronization ring (2004); The outer wall of the control shaft (2002) is fixedly provided with a snap ring (2009), the inner wall of the snap ring (2009) is provided with ratchet teeth (211) in a circumferential array, the outer wall of the synchronization ring (2004) is provided with a disk (212), a ratchet groove (214) is provided in the disk (212), and a ratchet (2013) is rotatably provided in the ratchet groove (2014); A first elastic member (218) is provided between the ratchet (2013) and the inner wall of the ratchet groove (2014); when the flow velocity difference between the first air intake pipe (200) and the second air intake pipe (201) exceeds a flow velocity warning value, the ratchet (2013) engages with the ratchet tooth (2011); The temperature control component comprises a water spray plug (300) movably engaged with the heat exchange baffle (102), a first receiving groove (301) provided in the middle of the outer wall of the rotating column (103), and second receiving grooves (302) provided on both sides of the outer wall of the rotating column (103), wherein the heat exchange baffle (102) located in the second receiving groove (302) moves along the rotating column (103) and can be moved into the first receiving groove (301).

2. The baffle adjustment assembly for a heat exchanger unit according to claim 1, characterized in that: Also includes: An adjustment groove (1001) is provided on the heat exchange baffle (102), a slider (1002) is provided on the inner wall of the adjustment groove (1001), the slider (1002) is slidably arranged on the inner wall of the spiral guide rail (104), a reference groove (1003) is provided at the center of the rotating column (103), and there are two spiral guide rails (104) in total and they are symmetrically distributed about the reference groove (1003).

3. The baffle adjustment assembly for a heat exchanger unit according to claim 2, characterized in that: The heat exchange baffle (102) is provided with a truncated cone groove (1004), a water pipe (1005) is provided in the heat exchanger (100), and the water spray plug (300) is fixedly arranged on the outer wall of the water pipe (1005) and is in communication with the water pipe (1005); A connecting rod (1006) is sleeved on one end of the worm gear (2007), a transmission member (1007) is provided at the end of the connecting rod (1006), the connecting rod (1006) drives the rotating column (103) to rotate via the transmission member (1007), and the heat exchange baffle (102) is rotatably provided in the reference groove (1003).

4. The baffle adjustment assembly for a heat exchanger unit according to claim 3, characterized in that: A spare heat exchange baffle (102) is slidably provided in the second receiving groove (302), a push rod (1008) is slidably provided on the inner wall of the heat exchanger (100), a push plate (1009) is provided at the end of the push rod (1008), and the push plate (1009) is movably fitted to the outer wall of the heat exchange baffle (102); The outer wall sliding sleeve of the push rod (1008) is provided with a second elastic member (1011), and two ends of the second elastic member (1011) are respectively in contact with the heat exchange baffle (102) and the inner wall of the heat exchanger (100).

5. A heat exchange baffle, applied to a baffle adjustment assembly for a heat exchange unit as claimed in claim 4, characterized in that: The surface of the heat exchange baffle (102) is provided with spiral patterns, and the surface of the heat exchange baffle (102) is also designed with wavy patterns.

6. The heat exchange baffle according to claim 5, characterized in that: The heat exchange baffle (102) is arc-shaped, and the edge of the heat exchange baffle (102) is designed to be sawtooth-shaped.

7. The heat exchange baffle according to claim 6, characterized in that: The outer wall of the heat exchange baffle (102) is provided with protrusions, and the protrusions are in the shape of particles, strips or corrugations.

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