Flue gas flow equalizing device

Abstract

The utility model discloses a flue gas flow equalizing device, and relates to the technical field of industrial flue gas waste heat recovery, the flue gas flow equalizing device comprises a shell frame, a heat exchange module, an ash cleaning module and an ash discharging module, the heat exchange module is installed in the shell frame, a water inlet and a water outlet of the heat exchange module are both located outside the shell frame, and the interior of the heat exchange module is used for circulating water; a plurality of heat exchange channels are formed in the heat exchange module, high-temperature flue gas from the dust remover can exchange heat with water in the heat exchange module when passing through the heat exchange channels, the ash removal module is movably installed in the shell frame, and the ash removal module is movably connected with the periphery of the heat exchange module; and the dust removal module can reciprocate in the length direction of the heat exchange module and clean dust on the outer wall of the heat exchange module to the bottom of the shell frame, and the dust discharge module is installed at the lower end of the shell frame and used for discharging the dust entering the heat exchange channel. According to the utility model, the uniformity of a flue gas flow field can be improved, and pre-cooling and pre-dedusting of coal-fired flue gas are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial flue gas waste heat recovery, in particular to a flue gas flow equalization device. Background Art

[0002] As an excellent corrosion-resistant flue gas heat exchanger, tubular fluoroplastic flue gas heat exchanger has been widely used in coal-fired flue gas waste heat recovery in the past decade. However, due to the weak wear resistance of the fluoroplastic material itself, wear and leakage of heat exchange tubes caused by flue gas overheating, excessive smoke dust content and flow field deviation often occur in actual applications, seriously affecting the operational reliability of the equipment, greatly increasing the inspection and maintenance costs, and greatly reducing the energy-saving benefits. This has also restricted the market promotion and application of tubular fluoroplastic flue gas heat exchangers.

[0003] Currently, the most commonly used flue gas flow equalization devices in industrial flue gas treatment are mainly guide plates or grille plates. Depending on the actual shape of the flue, the guide plates or grille plates are arranged in different forms to achieve the goal of improving the uniformity of the flue gas flow field, thereby reducing wear on the heat exchange tubes and improving the overall heat transfer capacity of the heat exchanger. However, these guide devices can only solve the problem of uniformity in the flue gas flow field, and have no effect on flue gas with excessive temperature or excessive dust content. They are also poorly adaptable to different projects, require a large design workload, require high installation precision, and are difficult to debug. Utility Model Content

[0004] The purpose of the utility model is to provide a flue gas flow equalization device to solve the problems existing in the above-mentioned prior art, improve the uniformity of the flue gas flow field, and realize pre-cooling and pre-dust removal of coal-fired flue gas.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides a flue gas flow equalization device, comprising a shell frame, a heat exchange module, a dust cleaning module and an ash discharge module, the heat exchange module is installed in the shell frame, and the water inlet and water outlet of the heat exchange module are both located outside the shell frame, the heat exchange module is used for circulating water, and the heat exchange module is provided with a plurality of heat exchange channels, and the high-temperature flue gas from the dust collector can exchange heat with the water in the heat exchange module when passing through the heat exchange channels, the dust cleaning module is movably installed in the shell frame, and the dust cleaning module is movably connected to the periphery of the heat exchange module, the dust cleaning module can reciprocate along the length direction of the heat exchange module and clean the dust on the outer wall of the heat exchange module to the bottom of the shell frame, the dust discharge module is installed at the lower end of the shell frame, and the dust discharge module is used to discharge dust entering the heat exchange channels.

[0007] Preferably, the longitudinal section of the shell frame is rectangular, and the shell frame includes a top sealing plate, an ash hopper, two side sealing plates and four supporting legs. The side sealing plates are symmetrically installed at both ends of the top sealing plate, and the side sealing plates and the top sealing plate are connected by flanges. The two ends of the ash hopper are respectively installed at the lower ends of the two side sealing plates, and the four supporting legs are respectively installed at the four corners of the ash hopper.

[0008] Preferably, the shell frame also includes a plurality of internal support rods, which are divided into transverse support rods and longitudinal support rods. The transverse support rods and the longitudinal support rods are perpendicular to each other and fixedly connected. The two ends of the transverse support rods are respectively installed on the inner sides of the two side sealing plates, and the two ends of the longitudinal support rods are respectively installed on the top sealing plate and the ash hopper.

[0009] Preferably, a pad is fixed to the lower end of each of the legs.

[0010] Preferably, the heat exchange module includes a water inlet connecting pipe, a water inlet, a heat exchange tube group, a water outlet connecting pipe and a water outlet. The heat exchange tube group is installed in the shell frame, and the length direction of the heat exchange tube group extends in the vertical direction. A plurality of heat exchange channels are provided in the heat exchange tube group. The water inlet connecting pipe and the water outlet connecting pipe are both installed at the upper end of the shell frame, and both ends of the water inlet connecting pipe and both ends of the water outlet connecting pipe are blocked. One side of the water inlet connecting pipe is connected to the water inlet, and the other side of the water inlet connecting pipe is connected to the water inlet end of the heat exchange tube group. One side of the water outlet connecting pipe is connected to the water outlet, and the other side of the water outlet connecting pipe is connected to the water outlet end of the heat exchange tube group.

[0011] Preferably, the heat exchange tube group includes a plurality of U-shaped heat exchange tubes arranged in sequence and in a staggered arrangement along the horizontal direction, each of the U-shaped heat exchange tubes is perpendicular to the horizontal plane and has an angle with the vertical plane, the water inlet end of the U-shaped heat exchange tube is connected to the water inlet connecting pipe, and the water outlet end of the U-shaped heat exchange tube is connected to the water outlet connecting pipe.

[0012] Preferably, the dust cleaning module includes a lifting element, a first anti-scraper, a second anti-scraper and a plurality of positioning elements. The lifting element is installed on the shell frame, and the first anti-scraper and the second anti-scraper are both connected to the lifting element and can be lifted and lowered by the lifting element. The first anti-scraper and the second anti-scraper are arranged up and down and are both sleeved on the outer periphery of each U-shaped heat exchange tube, and can scrape dust on the outer wall of each U-shaped heat exchange tube during lifting. The distance between the first anti-scraper and the second anti-scraper is fixed, the positioning element is fixedly installed on the lifting element, and each positioning element is used to respectively realize the fixation of the first anti-scraper and the second anti-scraper.

[0013] Preferably, a guide rail is fixed to each of the two inner side walls of the shell frame, and both ends of the first anti-scraper plate and the second anti-scraper plate are respectively slidably fitted on the two guide rails; the lifting element includes an actuator and a screw rod, and the actuator is installed on the upper end of the shell frame through a bracket, and the output end of the actuator is threadedly connected to the upper end of the screw rod, and the lower end of the screw rod passes through and fixes the first anti-scraper plate and the second anti-scraper plate in turn, and extends to the lower end of the shell frame, and a movable connection is adopted between the screw rod and the first anti-scraper plate, and between the screw rod and the second anti-scraper plate; the positioning element is a fixed plate ring, and a fixed plate ring is provided on the upper and lower sides of the first anti-scraper plate and the upper and lower sides of the second anti-scraper plate, and the fixed plate ring is connected to the screw rod by a pin or a thread.

[0014] Preferably, the first anti-scraper plate and the second anti-scraper plate have the same structure and are both provided with two rows of cleaning holes, the two rows of cleaning holes are staggered, and the inner walls of the cleaning holes are provided with a circle of tooth-shaped structure, the cleaning holes are used to pass the U-shaped heat exchange tube, and the tooth-shaped structures in the two cleaning holes that are opposite to each other in the vertical direction in the first anti-scraper plate and the second anti-scraper plate are complementary; a card slot is provided at each end of the first anti-scraper plate and the second anti-scraper plate, the card slot is slidably connected to the guide rail, and the inner wall of the card slot is provided with a tooth-shaped structure, and the tooth-shaped structures in the two card slots that are opposite to each other in the vertical direction in the first anti-scraper plate and the second anti-scraper plate are complementary.

[0015] Preferably, the ash discharge module includes an ash discharge pipe and an automatic ash discharge valve, one end of the ash discharge pipe is connected to the lower end of the shell frame and communicates with the interior of the shell frame, the other end of the ash discharge pipe extends away from the shell frame, and the automatic ash discharge valve is installed on the ash discharge pipe.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] The flue gas flow equalizing device provided by the utility model is arranged in the inlet flue of the tubular fluoroplastic flue gas heat exchanger, the heat exchange module is installed in the shell frame, and the water inlet and outlet of the heat exchange module are both located outside the shell frame, the heat exchange module is used to circulate water, and then uses water as a cooling medium to absorb the heat of the flue gas, a plurality of heat exchange channels are provided in the heat exchange module, the high-temperature flue gas from the dust collector enters the heat exchange channel through one side of the shell frame, and exchanges heat with the water in the heat exchange module when passing through the heat exchange channel, so that the water in the heat exchange module absorbs heat and the temperature increases, and the high-temperature flue gas releases heat and the temperature decreases, thereby realizing pre-cooling of the high-temperature flue gas, the dust cleaning module is movably installed in the shell frame, and the dust cleaning module is movably connected to the periphery of the heat exchange module, the dust cleaning module can move back and forth along the length direction of the heat exchange module and clean the dust on the outer wall of the heat exchange module to the bottom of the shell frame, thereby realizing dust removal on the outer wall of the heat exchange module, avoiding affecting the heat exchange effect due to excessive adhesion of dust, the dust discharge module is installed at the lower end of the shell frame, and the dust discharge module is used to discharge dust entering the heat exchange channel. Through the above design, on the basis of completely solving the problem of flue gas flow field uniformity, the effects of pre-cooling and pre-dust removal of coal-fired flue gas are achieved at the same time, and the ultimate goal is to improve the operating safety of the tubular fluoroplastic heat exchanger, ensure its long-term stable operation, significantly reduce the inspection and maintenance costs and effectively increase the economic efficiency of the flue gas waste heat recovery project. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in 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 paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of the smoke flow equalization device in the present utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the flue gas flow equalization device of the present invention when the heat exchange tube group is removed;

[0021] Figure 3 This is a front view of the smoke flow equalizing device in the utility model;

[0022] Figure 4 for Figure 3 AA section view in;

[0023] Figure 5 for Figure 3 Left view of;

[0024] Figure 6 for Figure 3 Right view;

[0025] Figure 7 for Figure 6 BB cross-section diagram;

[0026] Figure 8 for Figure 3 A top view of

[0027] Figure 9 This is a top view of the first anti-stuck scraper in the present utility model;

[0028] Figure 10 for Figure 9 A magnified schematic diagram of point A;

[0029] Figure 11 for Figure 9 An enlarged schematic diagram of point B;

[0030] Figure 12 This is a top view of the second anti-stuck scraper in the present invention;

[0031] Figure 13 for Figure 12 An enlarged schematic diagram of point C;

[0032] Figure 14 for Figure 12 An enlarged schematic diagram of point D;

[0033] In the figure: 1-actuator, 2-heat exchange tube group, 3-inner support rod, 41-first anti-stuck scraper, 42-second anti-stuck scraper, 43-water inlet, 44-water outlet, 45-cage, 5-ash hopper, 6-automatic ash unloading valve, 7-support leg, 8-water inlet, 9-water outlet, 10-reinforcement rib, 11-side sealing plate, 12-ash discharge pipe, 13-screw, 14-water inlet connecting pipe, 15-water outlet connecting pipe, 16-top sealing plate, 17-flange, 18-pad, 19-guide rail, 20-fixed plate ring, 21-bracket. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] The purpose of the utility model is to provide a flue gas flow equalization device to solve the problems existing in the prior art, improve the uniformity of the flue gas flow field, and achieve pre-cooling and pre-dust removal of coal-fired flue gas.

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0037] like Figures 1-14 As shown, this embodiment provides a flue gas flow equalization device, including a shell frame, a heat exchange module, a dust cleaning module and an ash discharge module, which are arranged in the inlet flue of the tubular fluoroplastic flue gas heat exchanger, the heat exchange module is installed in the shell frame, and the water inlet 8 and the water outlet 9 of the heat exchange module are both located outside the shell frame. Water is used to circulate in the heat exchange module, and then water is used as a cooling medium to absorb the heat of the flue gas. A plurality of heat exchange channels are provided in the heat exchange module. The high-temperature flue gas from the dust collector enters the heat exchange channel through one side of the shell frame, and when passing through the heat exchange channel, it is heated by the water in the heat exchange module. Heat exchange causes the water in the heat exchange module to absorb heat and increase its temperature, while the high-temperature flue gas releases heat and decreases its temperature, thereby achieving pre-cooling of the high-temperature flue gas. The dust cleaning module is movably installed in the shell frame, and the dust cleaning module is movably connected to the periphery of the heat exchange module. The dust cleaning module can move back and forth along the length of the heat exchange module and clean the dust on the outer wall of the heat exchange module to the bottom of the shell frame, thereby achieving dust removal on the outer wall of the heat exchange module and avoiding excessive adhesion of dust, which affects the heat exchange effect. The dust discharge module is installed at the lower end of the shell frame, and the dust discharge module is used to discharge dust entering the heat exchange channel. Through the above design, this embodiment, on the basis of completely solving the problem of uniformity of the flue gas flow field, simultaneously achieves the effects of pre-cooling and pre-dust removal of coal-fired flue gas, ultimately achieving the goals of improving the operational safety of the tubular fluoroplastic heat exchanger, ensuring its long-term stable operation, significantly reducing the cost of overhaul and maintenance, and effectively increasing the economic efficiency of the flue gas waste heat recovery project.

[0038] Specifically, the housing frame has a rectangular longitudinal cross-section and includes a top sealing plate 16, an ash hopper 5, two side sealing plates 11, and four support legs 7. The side sealing plates 11 are symmetrically mounted at both ends of the top sealing plate 16 and connected to the top sealing plate 16 via flanges 17 for easy assembly and disassembly. The ends of the ash hopper 5 are respectively mounted at the lower ends of the two side sealing plates 11 to collect dust above the ash hopper 5. The ash hopper 5 and the side sealing plates 11 are also connected via flanges 17. The four support legs 7 are respectively mounted at the four corners of the ash hopper 5 to support the entire structure. Reinforcement ribs 10 are also mounted on the side sealing plates 11 to increase overall strength.

[0039] The shell frame also includes multiple internal support rods 3, preferably four. The internal support rods 3 are divided into transverse support rods and longitudinal support rods. One transverse support rod and one longitudinal support rod form a group, and the transverse support rods and longitudinal support rods in the same group are perpendicular to each other and fixedly connected. The two ends of the transverse support rod are respectively installed on the inner sides of the two side sealing plates 11, and the two ends of the longitudinal support rod are respectively installed on the top sealing plate 16 and the ash hopper 5 to improve the overall connection strength.

[0040] A pad 18 is fixed to the lower end of each leg 7 to improve support stability.

[0041] The heat exchange module includes an inlet pipe 14, a water inlet 8, a heat exchange tube group 2, an outlet pipe 15 and a water outlet 9. The heat exchange tube group 2 is installed in the shell frame, and the length direction of the heat exchange tube group 2 extends in the vertical direction. The heat exchange tube group 2 is provided with a plurality of heat exchange channels. The inlet pipe 14 and the outlet pipe 15 are both installed at the upper end of the shell frame, and both ends of the inlet pipe 14 and the outlet pipe 15 are blocked. One side of the inlet pipe 14 is connected to the water inlet. 8 is connected so that low-temperature water is passed into the water inlet pipe 14 through the water inlet 8, and the other side of the water inlet pipe 14 is connected to the water inlet end 43 of the heat exchange tube group 2, so that the low-temperature water in the water inlet pipe 14 is passed into the heat exchange tube group 2 and exchanges heat with the high-temperature flue gas. One side of the water outlet pipe 15 is connected to the water outlet 9, and the other side of the water outlet pipe 15 is connected to the water outlet end 44 of the heat exchange tube group 2. The high-temperature water after heat exchange enters the water outlet pipe 15 and is discharged through the water outlet 9.

[0042] The heat exchange tube group 2 includes a plurality of U-shaped heat exchange tubes arranged in sequence along the horizontal direction and arranged in a staggered manner. The staggered arrangement can better achieve the effect of a uniform flue gas flow field; the U-shaped heat exchange tubes are fixed by welding at the connection with the top sealing plate 16, and each U-shaped heat exchange tube is perpendicular to the horizontal plane and has an angle with the vertical plane, that is, the connecting line of the water inlet end 43 and the water outlet end 44 of each U-shaped heat exchange tube has an angle with the length direction of the top sealing plate 16. In the top view, the arrangement direction of the multiple water inlet ends 43 is parallel to the arrangement direction of the multiple water outlet ends 44, and the multiple water inlet ends 43 and the multiple water outlet ends 44 are arranged alternately, the water inlet end 43 of the U-shaped heat exchange tube is connected to the water inlet connecting pipe 14, and the water outlet end 44 of the U-shaped heat exchange tube is connected to the water outlet connecting pipe 15.

[0043] In this embodiment, since the U-shaped heat exchange tubes of the heat exchange tube group 2 are arranged in a cross-row manner, on the one hand, the cross-arranged U-shaped heat exchange tubes can form an effective impact capture effect on the dust in the flue gas, and large particles of dust fall into the lower ash hopper 5 under the action of gravity, and small particles of dust adhere to the outer wall of the U-shaped heat exchange tube. The first anti-stuck scraper 41 and the second anti-stuck scraper 42 periodically move up and down to scrape off the dust adhering to the outer wall of the U-shaped heat exchange tube, and a part of the fine dust falls into the lower ash hopper 5, and finally passes through the automatic ash discharge valve 6 and the exhaust The ash is discharged from the ash pipe 12, and another part of the fine particles enters the tubular fluoroplastic flue gas heat exchanger area with the flue gas flow. In order to ensure the safe operation of the tubular fluoroplastic flue gas heat exchanger during the cleaning process, the online cleaning operation of this embodiment and the flushing and cleaning operation of the tubular fluoroplastic flue gas heat exchanger can be carried out simultaneously; on the other hand, the U-shaped heat exchange tubes arranged in a cross-staggered manner have a good breaking and suppressing effect on the vortex in the flue gas flow field, thereby significantly improving the uniformity of the flue gas flow field and enhancing the heat exchange capacity and operation safety of the tubular fluoroplastic flue gas heat exchanger.

[0044] The dust cleaning module includes a lifting element, a first anti-scraper 41, a second anti-scraper 42 and multiple positioning elements. The lifting element is installed on the shell frame, and the first anti-scraper 41 and the second anti-scraper 42 are both connected to the lifting element and can be lifted and lowered by the lifting element. The first anti-scraper 41 and the second anti-scraper 42 are arranged up and down and are both sleeved on the outer periphery of each U-shaped heat exchange tube, and can scrape off dust on the outer wall of each U-shaped heat exchange tube during lifting. The distance between the first anti-scraper 41 and the second anti-scraper 42 is fixed, and the positioning element is fixedly installed on the lifting element, and each positioning element is used to respectively realize the fixation of the first anti-scraper 41 and the second anti-scraper 42 to ensure that the first anti-scraper 41 and the second anti-scraper 42 reliably follow the lifting element to move up and down to achieve a good cleaning effect.

[0045] The middle of the first anti-scraper plate 41 and the middle of the second anti-scraper plate 42 are both hollowed out to reduce their own weight and lower the power consumption required when the first anti-scraper plate 41 and the second anti-scraper plate 42 move up and down.

[0046] A guide rail 19 is fixed to each of the two inner side walls of the shell frame, and both ends of the first anti-scraper 41 and the second anti-scraper 42 are respectively slidably connected to the two guide rails 19, thereby guiding the lifting and lowering of the first anti-scraper 41 and the second anti-scraper 42, and at the same time avoiding the risk of the heat exchange tube group 2 swinging in the horizontal direction with the airflow, thereby improving the lifting and lowering of the first anti-scraper 41 and the second anti-scraper 42 and the mechanical stability of the heat exchange tube group 2; the lifting element includes an actuator 1 and a screw 13, the actuator 1 is installed on the upper end of the shell frame through the bracket 21, the actuator 1 is preferably driven by a motor, the output end of the actuator 1 is threadedly connected to the upper end of the screw 13, and then the screw 13 is driven up and down by the actuator 1, and the lower end of the screw 13 passes through and fixes the first anti-scraper 41 and the second anti-scraper 42 in turn, and extends to the lower end of the shell frame, and the screw 13 does not protrude from the shell The lower end of the body frame can drive the first anti-scraper 41 and the second anti-scraper 42 to move up and down synchronously through the screw 13 when the actuator 1 drives the screw 13 to move up and down. The screw 13 and the first anti-scraper 41, as well as the screw 13 and the second anti-scraper 42 are all movably connected; the positioning element is a fixed plate ring 20, each two fixed plate rings 20 are a group, and there is a spacing between the two groups of fixed plate rings 20, and a fixed plate ring 20 is provided on the upper and lower sides of the first anti-scraper 41 and the upper and lower sides of the second anti-scraper 42. The fixed plate ring 20 is connected to the screw 13 with a pin or thread, and the fixed connection between the first anti-scraper 41 and the screw 13 and the second anti-scraper 42 and the screw 13 is completed through the fixed plate ring 20, and then when cleaning is required, the up and down movement of the screw 13 can realize the lifting and lowering of the first anti-scraper 41 and the second anti-scraper 42 to complete the cleaning operation.

[0047] To ensure comprehensive cleaning, multiple cleaning modules can be installed, each located at different locations along the length of the U-shaped heat exchange tube. This arrangement effectively shortens the vertical travel of the screw 13, the first anti-stuck scraper 41, and the second anti-stuck scraper 42. This reduces the risk of jamming between the first and second anti-stuck scrapers 41, 42 and the heat exchange tube group 2 and guide rails 19, while also facilitating on-site installation.

[0048] The first anti-stuck scraper 41 and the second anti-stuck scraper 42 have the same structure and are both provided with two rows of cleaning holes. The two rows of cleaning holes are staggered to achieve an inclined U-shaped heat exchange tube, and a circle of tooth-shaped structure is provided on the inner wall of the cleaning hole. The cleaning hole is used to pass the U-shaped heat exchange tube. The tooth-shaped structure can achieve cleaning while allowing dust to fall through the tooth groove to avoid jamming due to excessive dust. At the same time, it can also ensure that all outer wall surfaces of the U-shaped heat exchange tube can be cleaned without omission, fully ensuring the cleanliness of the outer wall of the U-shaped heat exchange tube.

[0049] In the first anti-scraper 41 and the second anti-scraper 42, the tooth-shaped structures in the two cleaning holes that are positioned opposite to each other in the vertical direction are complementary. The complementary positions mean that the projections of the two tooth-shaped structures that are positioned opposite to each other in the horizontal direction are complementary, that is, in the two tooth-shaped structures that correspond to each other in the vertical direction, the teeth in the upper tooth-shaped structure correspond to the tooth grooves in the lower tooth-shaped structure, and the tooth grooves in the upper tooth-shaped structure correspond to the teeth in the lower tooth-shaped structure. A groove 45 is provided at each end of the first anti-scraper 41 and the second anti-scraper 42. The groove 45 is slidably connected to the guide rail 19, and the inner wall of the groove 45 is provided with a tooth-shaped structure. The tooth-shaped structure can achieve connection with the guide rail 19 while allowing dust to fall through the tooth groove to avoid jamming due to excessive dust. In the first anti-scraper 41 and the second anti-scraper 42, the tooth-shaped structures in the two grooves 45 that are positioned opposite to each other in the vertical direction are complementary.

[0050] The ash discharge module includes an ash discharge pipe 12 and an automatic ash discharge valve 6. One end of the ash discharge pipe 12 is connected to the lower end of the shell frame and is connected to the inside of the shell frame. The other end of the ash discharge pipe 12 extends away from the shell frame. The automatic ash discharge valve 6 is installed on the ash discharge pipe 12. The opening and closing of the automatic ash discharge valve 6 is electrically controlled to discharge the dust after collection.

[0051] The specific working process of this embodiment is as follows:

[0052] This embodiment is arranged in the inlet flue of the tubular fluoroplastic flue gas heat exchanger, so that the water coming out of the tubular fluoroplastic flue gas heat exchanger enters the water inlet 8 of this embodiment through the pipeline, and then enters the U-shaped heat exchange tube of the heat exchange tube group 2 through the water inlet pipe 14; the high-temperature flue gas from the dust collector enters the outer periphery of the U-shaped heat exchange tube, and at the same time, the high-temperature flue gas exchanges heat with the water through the tube wall of the U-shaped heat exchange tube. After the water absorbs heat and heats up, it is discharged through the water outlet pipe 15 through the water outlet 9. The high-temperature flue gas cools down and enters the tubular fluoroplastic flue gas heat exchanger. At the same time, in the inlet of this embodiment, A bypass pipe is set between the water inlet and outlet pipelines, and a water flow regulating valve is set on the water inlet pipeline to adjust the water flow entering the heat exchange tube group 2, so as to achieve the effect of adjusting the flue gas cooling range; at the same time, based on the relatively high outlet water temperature of the tubular fluoroplastic flue gas heat exchanger, combined with the water flow regulation function, in the heat exchange process between the flue gas and water in this embodiment, condensation will not occur on the flue gas side, and the corrosiveness of the flue gas will be well controlled. Therefore, the heat exchange tube group 2 can use more economical steel as the heat exchange tube material, thereby reducing the overall cost of the device.

[0053] This embodiment integrates the functions of cooling, dust removal, and flow equalization, and can effectively solve the scaling, clogging, and leakage problems commonly found in current applications of tubular fluoroplastic flue gas heat exchangers. At the same time, different numbers of U-shaped heat exchange tubes can be arranged in the direction of flue gas flow to meet the specific requirements of different projects for flue gas flow field, flue gas temperature, and dust content. This embodiment uses the outlet water of the tubular fluoroplastic flue gas heat exchanger as a cold source to cool the flue gas at the inlet of the tubular fluoroplastic flue gas heat exchanger, thereby ensuring that the flue gas temperature entering the tubular fluoroplastic flue gas heat exchanger is within the safe operating range required by the fluoroplastic heat exchange tubes, thereby achieving the purpose of ensuring the operational safety of the tubular fluoroplastic flue gas heat exchanger.

[0054] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A flue gas flow equalization device, characterized in that: The heat exchange module comprises a shell frame, a heat exchange module, a dust cleaning module and an ash discharge module. The heat exchange module is installed in the shell frame, and the water inlet and water outlet of the heat exchange module are both located outside the shell frame. The heat exchange module is used for circulating water, and a plurality of heat exchange channels are provided in the heat exchange module. The high-temperature flue gas from the dust collector can exchange heat with the water in the heat exchange module when passing through the heat exchange channel. The dust cleaning module is movably installed in the shell frame, and the dust cleaning module is movably connected to the periphery of the heat exchange module. The dust cleaning module can move back and forth along the length direction of the heat exchange module and clean the dust on the outer wall of the heat exchange module to the bottom of the shell frame. The ash discharge module is installed at the lower end of the shell frame, and the ash discharge module is used to discharge dust entering the heat exchange channel.

2. The flue gas flow equalization device according to claim 1, characterized in that: The longitudinal section of the shell frame is rectangular, and the shell frame includes a top sealing plate, an ash collecting hopper, two side sealing plates and four supporting legs. The side sealing plates are symmetrically installed at both ends of the top sealing plate, and the side sealing plates and the top sealing plate are connected by flanges. The two ends of the ash collecting hopper are respectively installed at the lower ends of the two side sealing plates, and the four supporting legs are respectively installed at the four corners of the ash collecting hopper.

3. The flue gas flow equalization device according to claim 2, characterized in that: The shell frame also includes a plurality of inner support rods, which are divided into transverse support rods and longitudinal support rods. The transverse support rods and the longitudinal support rods are perpendicular to each other and fixedly connected. The two ends of the transverse support rods are respectively installed on the inner sides of the two side sealing plates, and the two ends of the longitudinal support rods are respectively installed on the top sealing plate and the ash collecting hopper.

4. The flue gas flow equalization device according to claim 2, characterized in that: A pad is fixed to the lower end of each supporting leg.

5. The flue gas flow equalization device according to claim 1, characterized in that: The heat exchange module includes a water inlet connecting pipe, a water inlet, a heat exchange tube group, a water outlet connecting pipe and a water outlet. The heat exchange tube group is installed in the shell frame, and the length direction of the heat exchange tube group extends in the vertical direction. A plurality of heat exchange channels are provided in the heat exchange tube group. The water inlet connecting pipe and the water outlet connecting pipe are both installed at the upper end of the shell frame, and both ends of the water inlet connecting pipe and both ends of the water outlet connecting pipe are blocked. One side of the water inlet connecting pipe is connected to the water inlet, and the other side of the water inlet connecting pipe is connected to the water inlet end of the heat exchange tube group. One side of the water outlet connecting pipe is connected to the water outlet, and the other side of the water outlet connecting pipe is connected to the water outlet end of the heat exchange tube group.

6. The flue gas flow equalization device according to claim 5, characterized in that: The heat exchange tube group includes a plurality of U-shaped heat exchange tubes arranged in sequence and in a staggered arrangement along the horizontal direction. Each of the U-shaped heat exchange tubes is perpendicular to the horizontal plane and has an angle with the vertical plane. The water inlet end of the U-shaped heat exchange tube is connected to the water inlet connecting pipe, and the water outlet end of the U-shaped heat exchange tube is connected to the water outlet connecting pipe.

7. The flue gas flow equalizing device according to claim 6, characterized in that: The dust cleaning module includes a lifting element, a first anti-scraper, a second anti-scraper and multiple positioning elements. The lifting element is installed on the shell frame, and the first anti-scraper and the second anti-scraper are both connected to the lifting element and can be lifted and lowered by the lifting element. The first anti-scraper and the second anti-scraper are arranged up and down and are both sleeved on the outer circumference of each U-shaped heat exchange tube, and can scrape dust on the outer wall of each U-shaped heat exchange tube during lifting. The distance between the first anti-scraper and the second anti-scraper is fixed, and the positioning element is fixedly installed on the lifting element, and each positioning element is used to respectively realize the fixation of the first anti-scraper and the second anti-scraper.

8. The flue gas flow equalizing device according to claim 7, characterized in that: A guide rail is fixed to each of the two inner side walls of the shell frame, and both ends of the first anti-scraper plate and the second anti-scraper plate are respectively slidably connected to the two guide rails; the lifting element includes an actuator and a screw rod, and the actuator is installed on the upper end of the shell frame through a bracket, and the output end of the actuator is threadedly connected to the upper end of the screw rod, and the lower end of the screw rod passes through and fixes the first anti-scraper plate and the second anti-scraper plate in turn, and extends to the lower end of the shell frame, and the screw rod and the first anti-scraper plate, as well as the screw rod and the second anti-scraper plate are both movably connected; the positioning element is a fixed plate ring, and a fixed plate ring is provided on the upper and lower sides of the first anti-scraper plate and the upper and lower sides of the second anti-scraper plate, and the fixed plate ring is connected to the screw rod by a pin or a thread.

9. The flue gas flow equalizing device according to claim 8, characterized in that: The first anti-scraper and the second anti-scraper have the same structure and are both provided with two rows of cleaning holes. The two rows of cleaning holes are staggered, and the inner walls of the cleaning holes are provided with a circle of tooth-shaped structure. The cleaning holes are used to pass the U-shaped heat exchange tube. The tooth-shaped structures in the two cleaning holes that are opposite to each other in the vertical direction in the first anti-scraper and the second anti-scraper are complementary to each other; a slot is provided at each end of the first anti-scraper and the second anti-scraper, and the slot is slidably connected to the guide rail. The inner wall of the slot is provided with a tooth-shaped structure. The tooth-shaped structures in the two slots that are opposite to each other in the vertical direction in the first anti-scraper and the second anti-scraper are complementary to each other.

10. The flue gas flow equalization device according to claim 1, characterized in that: The ash discharge module includes an ash discharge pipe and an automatic ash discharge valve. One end of the ash discharge pipe is connected to the lower end of the shell frame and communicates with the interior of the shell frame. The other end of the ash discharge pipe extends away from the shell frame. The automatic ash discharge valve is installed on the ash discharge pipe.

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