Multifunctional integrated flue gas flow equalizing device

Abstract

The utility model discloses a multifunctional integrated flue gas flow equalizing device, and relates to the technical field of industrial flue gas waste heat recovery, the interior of a heat exchange module is used for circulating water, a plurality of heat exchange channels are arranged in the heat exchange module, and high-temperature flue gas from a dust remover can exchange heat with water in the heat exchange module when passing through the heat exchange channels; the dust removal module is movably installed in the shell frame, the dust removal module is movably connected with the periphery of the heat exchange module, 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. The dust discharging module is used for discharging dust entering the heat exchange channel; the two shell frames are arranged side by side in the smoke circulation direction, the two heat exchange modules are perpendicular to each other, and the two heat exchange channels are perpendicular to each other. According to the utility model, dust in flue gas can be efficiently captured and removed, the flue gas temperature can be effectively regulated and controlled, and meanwhile, the uniformity of a flue gas flow field is improved.

Description

Technical Field

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

[0002] As an excellent anti-corrosion flue gas heat exchanger, the tubular fluoroplastic flue gas heat exchanger has been widely used in the waste heat recovery of coal-fired flue gas in the past decade. However, due to the weak anti-abrasion performance of the fluoroplastic material itself, problems such as wear and leakage of heat exchange tubes caused by over-temperature of flue gas, too high dust content, and flow field deviation often occur in actual applications, seriously affecting the operation reliability of the equipment, greatly increasing the maintenance cost, significantly reducing the energy-saving benefit, and thus restricting the market promotion and application of the tubular fluoroplastic flue gas heat exchanger.

[0003] At present, the commonly used flue gas flow equalizing devices in the field of industrial flue gas treatment are mainly deflector plates or grid orifice plates. According to the actual shape of the flue, the deflector plates or grid orifice plates are arranged in different forms to achieve the goal of improving the uniformity of the flue gas flow field, thereby reducing the wear of the heat exchange tubes and enhancing the overall heat exchange capacity of the heat exchanger. However, on the one hand, the above-mentioned flow guiding devices can only solve the problem of the uniformity of the flue gas flow field, and have no effect on the over-temperature of the flue gas and too high dust content. On the other hand, they have poor adaptability to different projects, with large design workload, high installation accuracy requirements, and great commissioning difficulty. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a multifunctional integrated flue gas flow equalizing device to solve the problems existing in the above-mentioned prior art, realize the efficient capture and removal of dust in the flue gas, and be able to effectively control the flue gas temperature. At the same time, the uniformity of the flue gas flow field is improved.

[0005] To achieve the above purpose, the utility model provides the following solution:

[0006] The utility model provides a multifunctional integrated flue gas flow equalization device, which comprises two flue gas flow equalization units. Each flue gas flow equalization unit includes a shell frame, a heat exchange module, a dust cleaning module and an ash discharging module. 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. Water is used to flow in the heat exchange module, and a plurality of heat exchange channels are arranged in the heat exchange module. When the high-temperature flue gas from the dust collector passes through the heat exchange channels, it can exchange heat with the water in the heat exchange module. The dust cleaning module is movably installed in the shell frame, and the dust cleaning module is movably connected to the outer 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 ash discharging module is installed at the lower end of the shell frame, and the ash discharging module is used to discharge the dust entering the heat exchange channels. The two shell frames are arranged side by side along the flue gas flow direction, the two heat exchange modules are perpendicular to each other, and the two heat exchange channels are perpendicular to each other.

[0007] Preferably, the longitudinal section of each shell frame is rectangular. The shell frame includes a top sealing plate, a dust collecting hopper and two side sealing plates. The side sealing plates are symmetrically installed at both ends of the top sealing plate, and the side sealing plates are connected to the top sealing plate through flanges. The two ends of the dust collecting hopper are respectively installed at the lower ends of the two side sealing plates. The two shell frames can be detachably connected to form an integral outer frame, and the lower ends of the two dust collecting hoppers are respectively communicated with one ash discharging module. Four legs are respectively arranged at the four corners of the lower end surface of the integral outer frame, and a backing plate is respectively fixed at the lower end of each leg.

[0008] Preferably, the shell frame further includes a plurality of inner support rods. The inner support rods are divided into cross support rods and longitudinal support rods. The cross support rods and the longitudinal support rods are perpendicular to each other and fixedly connected. The two ends of the cross 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 dust collecting hopper. The two groups of inner support rods on the two shell frames are respectively installed on the sides of the two shell frames away from each other.

[0009] Preferably, the heat exchange module includes an inlet header, a heat exchange tube group, and an outlet header. The heat exchange tube group is installed within the housing frame, and a plurality of the heat exchange channels are provided in the heat exchange tube group. The two inlet headers are respectively a horizontal inlet header and a vertical inlet header, and the two outlet headers are respectively a horizontal outlet header and a vertical outlet header. In the two heat exchange tube groups of the two flue gas uniform flow units, one of the heat exchange tube groups extends in the vertical direction, and the horizontal inlet header and the horizontal outlet header are installed at the upper end of the corresponding housing frame. The other heat exchange tube group extends in the horizontal direction, and the vertical inlet header and the vertical outlet header are installed on one side of the corresponding housing frame. One end of the horizontal inlet header forms an inlet communicating with the outside, the other end of the horizontal inlet header is blocked, one end of the horizontal outlet header is blocked, the other end of the horizontal outlet header communicates with one end of the vertical inlet header, the other end of the vertical inlet header is blocked, one end of the vertical outlet header is blocked, and the other end of the vertical outlet header forms an outlet communicating with the outside. One side of the horizontal inlet header and one side of the vertical inlet header are respectively connected to the inlet ends of the corresponding heat exchange tube groups, and one side of the horizontal outlet header and one side of the vertical outlet header are respectively connected to the outlet ends of the corresponding heat exchange tube groups.

[0010] Preferably, in the two heat exchange tube groups, one of the heat exchange tube groups includes a plurality of U-shaped heat exchange tubes arranged in sequence in the horizontal direction and arranged in staggered rows. Each U-shaped heat exchange tube is perpendicular to the horizontal plane and has an angle with the vertical plane. The other heat exchange tube group includes a plurality of the U-shaped heat exchange tubes arranged in sequence in the vertical direction and arranged in staggered rows. Each U-shaped heat exchange tube is perpendicular to the vertical plane and has an angle with the horizontal plane. In the two heat exchange tube groups, the inlet ends of each U-shaped heat exchange tube are connected to the corresponding inlet header, and the outlet ends of each U-shaped heat exchange tube are connected to the corresponding outlet header.

[0011] Preferably, in the flue gas uniform flow unit in which the extending direction of the heat exchange tube group is horizontal, the ash cleaning module includes a translation driving element and a plurality of translation scrapers. The translation scrapers extend in the vertical direction and are arranged in sequence in the horizontal direction. The translation driving element is installed on the housing frame, and each translation scraper is connected to the translation driving element and can reciprocate in the horizontal direction under the drive of the translation driving element. Each translation scraper is arranged in sequence and sleeved on the outer periphery of each U-shaped heat exchange tube extending in the horizontal direction, and can scrape the dust on the outer walls of each U-shaped heat exchange tube extending in the horizontal direction during reciprocating translation. The distance between adjacent translation scrapers is fixed.

[0012] Preferably, a translation upper slide rail is installed on the inner top surface of the housing frame. A translation slide rail sleeve is slidably connected to the lower end of the translation upper slide rail. The lower end of the translation slide rail sleeve is fixedly connected to the upper end of each translation scraper. A translation lower slide rail is installed on the inner bottom surface of the housing frame. The translation driving element includes a translation actuator, a translation lead screw, a translation slide rod, and a translation connecting rod. The translation actuator is installed at the upper end of the housing frame, and the translation actuator is connected to one end of the translation lead screw. The translation lead screw is parallel to the horizontal direction. The upper end of the translation slide rod is connected to the outer circumference of the translation lead screw. The translation slide rod is perpendicular to the horizontal direction. The lower end of the translation slide rod is connected to the middle of the translation connecting rod. The translation connecting rod sequentially passes through and fixes each translation scraper. The translation connecting rod is parallel to the horizontal plane.

[0013] Preferably, in the flue gas flow equalizing unit where the extending direction of the heat exchange tube group is vertical, the ash cleaning module includes a lifting driving element and a plurality of lifting scrapers. The lifting scrapers extend in the horizontal direction and are arranged in sequence in the vertical direction. The lifting driving element is installed on the housing frame, and each lifting scraper is connected to the lifting driving element and can reciprocate in the vertical direction under the drive of the lifting driving element. Each lifting scraper is arranged in sequence and sleeved on the outer circumference of each U-shaped heat exchange tube extending in the vertical direction, and can scrape the dust on the outer walls of each U-shaped heat exchange tube extending in the vertical direction during reciprocating lifting. The distance between adjacent lifting scrapers is fixed.

[0014] Preferably, a lifting side slide rail is respectively fixed on the two inner side walls of the housing frame. The two ends of each lifting scraper are respectively slidably connected to the two lifting side slide rails. The lifting driving element includes a lifting actuator and a lifting connecting rod. The lifting actuator is installed at the upper end of the housing frame, and the lifting actuator is connected to the upper end of the lifting connecting rod. The lifting connecting rod sequentially passes through and fixes each lifting scraper. The lifting connecting rod is perpendicular to the horizontal plane.

[0015] Preferably, the ash discharging module includes an ash discharging pipe and an automatic ash discharging valve. One end of the ash discharging pipe is connected to the lower end of the housing frame and is communicated with the inside of the housing frame. The other end of the ash discharging pipe extends away from the housing frame. The automatic ash discharging valve is installed on the ash discharging pipe.

[0016] The utility model has achieved the following technical effects compared with the prior art:

[0017] The multifunctional integrated flue gas flow equalizing device provided by the utility model is arranged in the inlet flue of the tubular fluoroplastic flue gas heat exchanger and comprises two flue gas flow equalizing units. Each flue gas flow equalizing unit includes a shell frame, a heat exchange module, a dust cleaning module and an ash discharging module. 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. Water is used to flow in the heat exchange module, and thus water is used as a cooling medium to absorb the heat of the flue gas. A plurality of heat exchange channels are arranged in the heat exchange module. The high-temperature flue gas from the dust collector first enters the heat exchange channels through the shell frame corresponding to the horizontally arranged heat exchange module, and then passes through the shell frame corresponding to the vertically arranged heat exchange module and is discharged. When the high-temperature flue gas passes through the heat exchange channels, it can exchange heat with the water in the heat exchange module, so that the water in the heat exchange module absorbs heat and the temperature rises, and the high-temperature flue gas releases heat and the temperature drops, realizing the 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 outer 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, completing the dust cleaning function of the outer wall of the heat exchange module, thereby ensuring the heat exchange performance of the heat exchange module; at the same time, the dust removal effect of the flue gas is realized, avoiding excessive dust content in the flue gas entering the fluoroplastic heat exchanger area and affecting the safety of the fluoroplastic pipe. The ash discharging module is installed at the lower end of the shell frame, and the ash discharging module is used to discharge the dust entering the heat exchange channels. Through the above design, on the basis of thoroughly solving the problem of the uniformity of the flue gas flow field, the pre-cooling and pre-dust removal effects of the coal-fired flue gas are realized at the same time, and finally the goal of improving the operation safety of the tubular fluoroplastic heat exchanger, ensuring its long-term stable operation, significantly reducing the maintenance cost and effectively increasing the economy of the flue gas waste heat recovery project is achieved; the two shell frames are arranged side by side along the flue gas flow direction, the two heat exchange modules are perpendicular to each other, and the two heat exchange channels are perpendicular to each other, that is, the horizontally arranged heat exchange module and the vertically arranged heat exchange module are arranged in sequence along the high-temperature flue gas flow direction. On the one hand, it is convenient for the multifunctional integrated flue gas flow equalizing device in the utility model to be connected to the water system of the tubular fluoroplastic heat exchanger. On the other hand, the heat exchange process of the high-temperature flue gas and water in the multifunctional integrated flue gas flow equalizing device in the utility model as a whole presents the characteristics of countercurrent heat exchange, effectively improving the heat exchange intensity between the media. At the same time, the perpendicularity of the heat exchange modules has an efficient crushing and homogenizing effect on the vortices and uneven flows in the flue gas, thus significantly improving the uniformity of the flue gas flow field and enhancing the operation safety and heat exchange efficiency of the tubular fluoroplastic flue gas heat exchanger. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 Structural schematic diagram of the multifunctional integrated flue gas flow equalizing device of the present invention at an angle;

[0020] Figure 2 Structural schematic diagram of the multifunctional integrated flue gas flow equalizing device of the present invention at another angle;

[0021] Figure 3 Structural schematic diagram of the multifunctional integrated flue gas flow equalizing device of the present invention at an angle when removing each U-shaped heat exchange tube;

[0022] Figure 4 Structural schematic diagram of the multifunctional integrated flue gas flow equalizing device of the present invention at another angle when removing each U-shaped heat exchange tube;

[0023] Figure 5 Connection schematic diagram of the translation scraper and other components of the present invention;

[0024] Figure 6 Front view of the multifunctional integrated flue gas flow equalizing device of the present invention;

[0025] Figure 7 For Figure 6 A-A cross-sectional view;

[0026] Figure 8 For Figure 6 Rear view;

[0027] Figure 9 For Figure 8 B-B cross-sectional view;

[0028] Figure 10 For Figure 6 Left view;

[0029] Figure 11 For Figure 6 Right view;

[0030] Figure 12 For Figure 11 C-C cross-sectional view;

[0031] Figure 13 For Figure 6 Top view;

[0032] Figure 14For Figure 6 the bottom view;

[0033] In the figure: 1-top sealing plate, 2-side sealing plate, 3-ash hopper, 4-ash discharge pipe, 5-automatic ash discharge valve, 6-ash discharge pipe, 7-reinforcing rib, 8-support beam, 9-leg, 10-backing plate, 11-inner support rod, 12-horizontal heat exchange pipe, 13-vertical heat exchange pipe, 14-water inlet, 15-water outlet, 16-horizontal water inlet manifold, 17-vertical water inlet manifold, 18-lifting scraper, 19-translating scraper, 20-lifting side slide rail, 21-translating upper slide rail, 22-translating lower slide rail, 23-lifting connecting rod, 24-translating lead screw, 25-translating slide rail sleeve, 26-translating slide rod, 27-translating connecting rod, 28-lifting actuator, 29-translating actuator, 30-connecting flange, 31-actuator support, 32-horizontal water outlet manifold, 33-vertical water outlet manifold. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0035] The object of the present invention is to provide a multifunctional integrated flue gas flow equalization device to solve the problems existing in the prior art, achieve efficient capture and removal of dust in the flue gas, and be able to effectively regulate the flue gas temperature. At the same time, the uniformity of the flue gas flow field is improved.

[0036] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0037] As Figures 1-14As shown in the figure, this embodiment provides a multifunctional integrated flue gas flow equalization device, which is arranged in the inlet flue of a tubular fluoroplastic flue gas heat exchanger and includes two flue gas flow equalization units. Each flue gas flow equalization unit includes a housing frame, a heat exchange module, a dust cleaning module, and an ash discharging module. The heat exchange module is installed in the housing frame, and the water inlet 14 and water outlet 15 of the heat exchange module are both located outside the housing frame. Water is used to flow through the heat exchange module, and thus 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 first enters the heat exchange channels through the housing frame corresponding to the horizontally arranged heat exchange module, and then passes through the housing frame corresponding to the vertically arranged heat exchange module and discharges. When the high-temperature flue gas passes through the heat exchange channels, it can exchange heat with the water in the heat exchange module, causing the water in the heat exchange module to absorb heat and increase in temperature, and the high-temperature flue gas to release heat and decrease in temperature, thereby realizing the pre-cooling of the high-temperature flue gas. The dust cleaning module is movably installed in the housing frame, and the dust cleaning module is movably connected to the outer 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 housing frame, completing the dust cleaning function of the outer wall of the heat exchange module, thereby ensuring the heat exchange performance of the heat exchange module; at the same time, realizing the dust removal effect on the flue gas, avoiding excessive dust content in the flue gas entering the fluoroplastic heat exchanger area and affecting the safety of the fluoroplastic pipe. The ash discharging module is installed at the lower end of the housing frame, and the ash discharging module is used to discharge the dust entering the heat exchange channels. Through the above design, on the basis of thoroughly solving the problem of flue gas flow field uniformity, the pre-cooling and pre-dust removal effects of coal-fired flue gas are realized at the same time, and finally the goal of improving the operation safety of the tubular fluoroplastic heat exchanger, ensuring its long-term stable operation, significantly reducing the maintenance cost, and effectively increasing the economy of the flue gas waste heat recovery project is achieved; the two housing frames are arranged side by side along the flue gas flow direction, the two heat exchange modules are perpendicular to each other, and the two heat exchange channels are perpendicular to each other, that is, the horizontally arranged heat exchange module and the vertically arranged heat exchange module are arranged in sequence along the high-temperature flue gas flow direction. On the one hand, it is convenient for the multifunctional integrated flue gas flow equalization device in the present invention to be connected to the water system of the tubular fluoroplastic heat exchanger. On the other hand, the heat exchange process of the high-temperature flue gas and water in the multifunctional integrated flue gas flow equalization device in the present invention as a whole presents the characteristics of countercurrent heat exchange, effectively improving the heat exchange intensity between the media. At the same time, the perpendicularity of the heat exchange modules has an efficient crushing and homogenizing effect on the vortices and uneven flows in the flue gas, thereby significantly improving the uniformity of the flue gas flow field and enhancing the operation safety and heat exchange efficiency of the tubular fluoroplastic flue gas heat exchanger.

[0038] Specifically, the longitudinal section of each housing frame is rectangular. The housing frame includes a top sealing plate 1, an ash hopper 3, and two side sealing plates 2. The side sealing plates 2 are symmetrically installed at both ends of the top sealing plate 1, and the side sealing plates 2 are connected to the top sealing plate 1 through flanges. Both ends of the ash hopper 3 are respectively installed at the lower ends of the two side sealing plates 2. The two housing frames can be detachably connected to form an integral outer frame, which is convenient for disassembly and assembly. The lower ends of the two ash hoppers 3 are respectively communicated with a row of ash modules, which is convenient for discharging the dust collected by the ash hoppers 3. Each of the four corners of the lower end surface of the integral outer frame is provided with a support leg 9, and the support leg 9 plays a role in supporting the whole. A backing plate 10 is respectively fixed at the lower end of each support leg 9, which can play a role in anti-slip and improving the support stability. A reinforcing rib 7 is also installed on the side sealing plate 2, which can improve the overall strength. A support beam 8 is also installed below the ash hopper 3. Both ends of the support beam 8 are fixedly welded to the reinforcing rib 7, and the support leg 9 is installed below the support beam 8.

[0039] The housing frame further includes a plurality of internal struts 11. The internal struts 11 are divided into cross struts and longitudinal struts. The cross struts and longitudinal struts on the same housing frame are perpendicular to each other and fixedly connected. Both ends of the cross strut are respectively installed on the inner sides of the two side sealing plates 2, and both ends of the longitudinal strut are respectively installed on the top sealing plate 1 and the ash hopper 3. The two groups of internal struts 11 on the two housing frames are respectively installed on the sides of the two housing frames away from each other, which improves the overall connection strength.

[0040] The heat exchange module includes an inlet manifold, a heat exchange tube group, and an outlet manifold. The heat exchange tube group is installed within a housing frame, and multiple heat exchange channels are provided in the heat exchange tube group. The two inlet manifolds are a horizontal inlet manifold 16 and a vertical inlet manifold 17 respectively, and the two outlet manifolds are a horizontal outlet manifold 32 and a vertical outlet manifold 33 respectively. Among the two heat exchange tube groups, one heat exchange tube group extends in the vertical direction, and the horizontal inlet manifold 16 and the horizontal outlet manifold 32 are installed at the upper end of the corresponding housing frame. The other heat exchange tube group extends in the horizontal direction, and the vertical inlet manifold 17 and the vertical outlet manifold 33 are installed on one side of the corresponding housing frame. One end of the horizontal inlet manifold 16 forms a water inlet 14 communicating with the outside, so that low-temperature water is introduced into the horizontal inlet manifold 16 through the water inlet 14. The low-temperature water in the horizontal inlet manifold 16 is introduced into the corresponding heat exchange tube group and exchanges heat with high-temperature flue gas. The other end of the horizontal inlet manifold 16 is blocked. One end of the horizontal outlet manifold 32 is blocked. The other end of the horizontal outlet manifold 32 communicates with one end of the vertical inlet manifold 17, so that the water heated in one heat exchange tube group is introduced into the next heat exchange tube group for heat exchange. The other end of the vertical inlet manifold 17 is blocked. One end of the vertical outlet manifold 33 is blocked. The other end of the vertical outlet manifold 33 forms a water outlet 15 communicating with the outside. The heated high-temperature water enters the vertical outlet manifold 33 and is then discharged through the water outlet 15. One side of the horizontal inlet manifold 16 and one side of the vertical inlet manifold 17 are respectively connected to the water inlet ends of the corresponding heat exchange tube groups, and one side of the horizontal outlet manifold 32 and one side of the vertical outlet manifold 33 are respectively connected to the water outlet ends of the corresponding heat exchange tube groups.

[0041] In the two heat exchange tube groups of the two flue gas flow equalization units, one of the heat exchange tube groups includes multiple U-shaped heat exchange tubes arranged in sequence along the horizontal direction and in staggered arrangement, that is, the vertical heat exchange tubes 13. The staggered arrangement can better achieve the effect of uniform flue gas flow field. Each vertical heat exchange tube 13 is perpendicular to the horizontal plane and has an angle with the vertical plane. That is, the connection line between the water inlet end and the water outlet end of each vertical heat exchange tube 13 has an angle with the length direction of the top sealing plate 1. In the top view, the arrangement directions of multiple water inlet ends are parallel to the arrangement directions of multiple water outlet ends, and multiple water inlet ends and multiple water outlet ends are arranged alternately. At the same time, the vertical heat exchange tubes 13 are fixed by welding at the connection with the top sealing plate 1. The other heat exchange tube group includes multiple U-shaped heat exchange tubes arranged in sequence along the vertical direction and in staggered arrangement, that is, the horizontal heat exchange tubes 12. The staggered arrangement can better achieve the effect of uniform flue gas flow field. Each horizontal heat exchange tube 12 is perpendicular to the vertical plane and has an angle with the horizontal plane. That is, the connection line between the water inlet end and the water outlet end of each horizontal heat exchange tube 12 has an angle with the length direction of the side sealing plate 2. In the side view, the arrangement directions of multiple water inlet ends are parallel to the arrangement directions of multiple water outlet ends, and multiple water inlet ends and multiple water outlet ends are arranged alternately. At the same time, the horizontal heat exchange tubes 12 are fixed by welding at the connection with the side sealing plate 2. In the two heat exchange tube groups, the water inlet ends of each U-shaped heat exchange tube are connected to the corresponding water inlet header pipe, and the water outlet ends of each U-shaped heat exchange tube are connected to the corresponding water outlet header pipe. The U-shaped bend of the horizontal heat exchange tube 12 extends out of the shell frame through one side of the side sealing plate 2, and the end of the straight section extends out of the shell frame through the other side of the side sealing plate 2.

[0042] In this embodiment, since the U-shaped heat exchange tubes of the heat exchange tube group adopt the staggered arrangement method, on the one hand, the cross-arranged U-shaped heat exchange tubes can effectively impact and capture the dust in the flue gas. Large particle dust falls into the lower ash hopper 3 under the action of gravity, and small particle dust adheres to the outer wall of the U-shaped heat exchange tube. Through the periodic reciprocating movement of the ash cleaning module, the dust adhered to the outer wall of the U-shaped heat exchange tube is scraped off. Part of the fine dust falls into the lower ash hopper 3 and is finally discharged through the automatic ash discharge valve 5 and the ash discharge pipe 6. The other 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 ash cleaning process, the on-line ash cleaning operation and the flushing and ash cleaning operation of the tubular fluoroplastic flue gas heat exchanger in this embodiment can be carried out simultaneously; on the other hand, the cross-staggered arranged U-shaped heat exchange tubes have a good effect of breaking and suppressing the vortices in the flue gas flow field, thus 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.

[0043] In the flue gas flow equalization unit where the extension direction of the heat exchange tube group is horizontal, the ash cleaning module includes a translation drive element and a plurality of translation scrapers 19. The translation scrapers 19 extend in the vertical direction and are arranged in sequence in the horizontal direction. The translation drive element is installed on the housing frame, and each translation scraper 19 is connected to the translation drive element and can reciprocate horizontally under the drive of the translation drive element. Each translation scraper 19 is arranged in sequence and sleeved on the outer periphery of each horizontal heat exchange tube 12, and can scrape the dust on the outer walls of the horizontal heat exchange tubes 12 extending in the horizontal direction during reciprocating translation. The distance between adjacent translation scrapers 19 is fixed, and when the plurality of translation scrapers 19 move horizontally at the same time, they can achieve full coverage cleaning of the outer periphery of each horizontal heat exchange tube 12, improving the cleaning efficiency and cleaning effect.

[0044] A translation upper slide rail 21 is installed on the inner top surface of the housing frame. The lower end of the translation upper slide rail 21 is slidably connected with a translation slide rail sleeve 25 in a matching manner. The lower end of the translation slide rail sleeve 25 is fixedly connected to the upper end of each translation scraper 19. A translation lower slide rail 22 is installed on the inner bottom surface of the housing frame. Thus, the horizontal movement of each translation scraper 19 is guided by the translation upper slide rail 21, the translation slide rail sleeve 25, and the translation lower slide rail 22, improving the translation stability and ensuring the effective progress of the ash cleaning work. The translation drive element includes a translation actuator 29, a translation lead screw 24, a translation slide bar 26, and a translation connecting rod 27. The translation actuator 29 is installed at the upper end of the housing frame, and the translation actuator 29 is connected to one end of the translation lead screw 24. Thus, the translation actuator 29 drives the translation lead screw 24 to act. The translation lead screw 24 is parallel to the horizontal direction. The upper end of the translation slide bar 26 is connected to the outer periphery of the translation lead screw 24. The translation slide bar 26 is perpendicular to the horizontal direction. Thus, through the action of the translation lead screw 24, the translation slide bar 26 is driven to reciprocate horizontally. A rectangular hole is opened in the top sealing plate 1. The upper end of the translation slide bar 26 can extend out through the rectangular hole and can limit the translation of the translation slide bar 26. The joint of the translation slide rail sleeve 25, the translation upper slide rail 21, and the rectangular hole of the top sealing plate 1 adopts a special structural design, which can not only achieve the sealing of the flue gas in the housing frame but also ensure the normal left-right movement of the translation scraper 19, fully ensuring the safe and stable operation of the whole set of devices. The lower end of the translation slide bar 26 is connected to the middle of the translation connecting rod 27, realizing driving the translation connecting rod 27 to reciprocate horizontally through the translation slide bar 26. The translation connecting rod 27 passes through and fixes each translation scraper 19 in sequence. The translation connecting rod 27 is parallel to the horizontal plane, and finally realizes the synchronous translation of each translation scraper 19 and cleans the outer periphery of each horizontal heat exchange tube 12 during translation. A semicircular groove is opened on the upper end surface of the translation slide rail sleeve 25, and the translation slide rail sleeve 25 is slidably connected with the translation upper slide rail 21 through the semicircular groove.

[0045] In the flue gas flow equalizing unit where the extending direction of the heat exchange tube group is vertical, the ash cleaning module includes a lifting drive element and a plurality of lifting scrapers 18. The lifting scrapers 18 extend in the horizontal direction and are arranged in sequence in the vertical direction. The lifting drive element is installed on the housing frame, and each lifting scraper 18 is connected to the lifting drive element and can reciprocate in the vertical direction under the drive of the lifting drive element. The lifting scrapers 18 are arranged in sequence and are all sleeved on the outer periphery of each vertical heat exchange tube 13, and can scrape the dust on the outer walls of the vertical heat exchange tubes 13 during reciprocating lifting. The distance between adjacent lifting scrapers 18 is fixed, and when the plurality of lifting scrapers 18 move simultaneously in the vertical direction, it can achieve full coverage cleaning of the outer periphery of each vertical heat exchange tube 13, improving the cleaning efficiency and cleaning effect. Each vertical heat exchange tube 13 passes through the tube holes on the top sealing plate 1, and the U-shaped bends at the lower parts of the vertical heat exchange tubes 13 are directly above the ash hopper 3 and are flush with the bottom of the side sealing plate 2.

[0046] On the two inner side walls of the housing frame, a lifting side slide rail 20 is respectively fixed. The two ends of each lifting scraper 18 are respectively connected with the two lifting side slide rails 20 in a sliding fit manner, and the cross-section of the lifting side slide rail 20 is semi-circular. The end of the lifting scraper 18 is provided with a semi-circular groove. The sliding fit method with semi-circular arc cooperation can facilitate the lifting of the lifting scraper 18. At the same time, the cooperation between the semi-circular groove of the lifting scraper 18 and the lifting side slide rail 20 realizes the horizontal direction limiting effect on the vertical heat exchange tube 13, ensuring the stability of the vertical heat exchange tube 13 during the flue gas flow process and improving the mechanical reliability of the whole set of devices; the lifting drive element includes a lifting actuator 28 and a lifting connecting rod 23. The lifting actuator 28 is installed at the upper end of the housing frame, and the lifting actuator 28 is connected with the upper end of the lifting connecting rod 23. Then, the lifting connecting rod 23 is driven by the lifting actuator 28 to lift and lower. The lifting connecting rod 23 passes through and is fixed to each lifting scraper 18 in sequence. The lifting connecting rod 23 is perpendicular to the horizontal plane. As the lifting connecting rod 23 lifts and lowers, it drives each lifting scraper 18 to lift and lower, realizing the ash cleaning of the outer periphery of each vertical heat exchange tube 13. The threaded connection form is adopted between the threaded hole on the top sealing plate 1 and the lifting connecting rod 23, which can not only ensure the relative movement between the two, but also achieve the zigzag sealing effect on the flue gas inside the housing frame.

[0047] Below both the translation actuator 29 and the lifting actuator 28, there is an actuator support 31. In this embodiment, the multi-functional integrated flue gas flow equalizing device is connected to the on-site process system through a connecting flange 30.

[0048] The middle parts of both the translation scraper 19 and the lifting scraper 18 adopt a hollow design to reduce their own weights and lower the power consumption required for the movement of the translation scraper 19 and the lifting scraper 18.

[0049] The ash discharge module includes an ash discharge pipe 6 and an automatic ash unloading valve 5. The lower end of the ash hopper 3 is connected and communicated with one end of a discharge pipe 4. The other end of the discharge pipe 4 is connected and communicated with one end of the ash discharge pipe 6. The other end of the ash discharge pipe 6 extends away from the discharge pipe 4. The automatic ash unloading valve 5 is installed on the ash discharge pipe 6. By electrically controlling the opening and closing of the automatic ash unloading valve 5, the on-line cleaning of the soot and the on-line external discharge of the accumulated ash in the ash hopper 3 are realized periodically.

[0050] The specific working process of this embodiment is as follows:

[0051] In this embodiment, it is arranged in the inlet flue of the tubular fluoroplastic flue gas heat exchanger. The hot water coming out of the tubular fluoroplastic flue gas heat exchanger enters the water inlet 14 of this embodiment through a pipeline. The hot water enters the horizontal water inlet manifold 16, and then after being shunted by the horizontal water inlet manifold 16, it enters each vertical heat exchange tube 13, and finally converges at the horizontal water outlet manifold 32. The water in the horizontal water outlet manifold 32 enters the vertical water inlet manifold 17, and then after being shunted by the vertical water inlet manifold 17, it enters each horizontal heat exchange tube 12, and finally converges at the vertical water outlet manifold 33 and is discharged to the heat user through a pipeline; The high-temperature flue gas from the dust collector enters the external spaces of the horizontal heat exchange tubes 12 and the vertical heat exchange tubes 13 in sequence through the flue and is finally discharged to the tubular fluoroplastic flue gas heat exchanger through the flue. The high-temperature flue gas completes the heat exchange process with the hot water flowing in the horizontal heat exchange tubes 12 and the vertical heat exchange tubes 13 in sequence through the tube wall. After the hot water absorbs heat and increases in temperature, it is discharged through the horizontal water outlet manifold 32 and the vertical water outlet manifold 33 in sequence. At the same time, a bypass pipe is arranged between the inlet and outlet pipelines, and a water flow regulating valve is arranged on the inlet pipeline to regulate the water flow entering the heat exchange tube bundle, so as to achieve the effect of regulating 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 and combined with the water flow regulation function, in the heat exchange process of the flue gas and water in this embodiment, condensation will not occur on the flue gas side, and the corrosiveness of the flue gas can be well controlled. Therefore, the horizontal heat exchange tubes 12 and the vertical heat exchange tubes 13 can select steel with better economy as the heat exchange tube material, thereby reducing the comprehensive cost of the device.

[0052] Through the above design, this embodiment has the following advantages:

[0053] (1) The equipment of this embodiment integrates the functions of cooling, dust removal, and flow equalization, and can effectively solve the common problems of scaling, blockage, wear, and leakage in the current application of tubular fluoroplastic flue gas heat exchangers;

[0054] (2) This embodiment uses the outlet water of the tubular fluoroplastic flue gas heat exchanger as the cold source, and cools the flue gas at the inlet of the tubular fluoroplastic flue gas heat exchanger through the heat exchange tube bundle of this embodiment, so as to ensure that the flue gas temperature of the tubular fluoroplastic flue gas heat exchanger is within the safe operating range required by the fluoroplastic heat exchange tube, achieving the purpose of ensuring the operating safety of the tubular fluoroplastic flue gas heat exchanger;

[0055] (3) In this embodiment, through the staggered arrangement of U-shaped heat exchange tubes and the perpendicular design of two sets of U-shaped heat exchange tubes, on the one hand, it realizes the efficient breaking and homogenization of common vortices and crossflows in the flue gas, thereby achieving the effect of improving the uniformity of the inlet flue gas flow field of the tubular fluoroplastic flue gas heat exchanger; on the other hand, it effectively captures and removes the dust in the flue gas to reduce the dust content of the flue gas entering the tubular fluoroplastic flue gas heat exchanger, thereby achieving the effect of protecting the fluoroplastic heat exchange tubes.

[0056] (4) This embodiment can automatically realize the cleaning of the ash adhered to the outer wall of the U-shaped heat exchange tubes and the online discharge of the captured dust without shutting down the machine.

[0057] (5) In this embodiment, the horizontal heat exchange tubes 12 and the vertical heat exchange tubes 13 are arranged in sequence along the flue gas flow direction. On the one hand, it is convenient to connect with the water system of the tubular fluoroplastic flue gas heat exchanger; on the other hand, it realizes the overall countercurrent heat exchange effect of the flue gas and water in this embodiment, effectively improving the heat exchange intensity between the flue gas and water in this embodiment.

[0058] (6) This embodiment can not only meet the movement requirements during the ash cleaning process, but also meet the overall sealing requirements. At the same time, it can also stabilize the U-shaped heat exchange tubes and effectively prevent the risk of the U-shaped heat exchange tubes from swinging under the action of the flue gas and air flow.

[0059] (7) This embodiment adopts a skid-mounted integrated structure design and is connected to the original system in a flange connection form, which is convenient and fast to install.

[0060] Specific examples are used in the present utility model to elaborate on the principles and implementation manners of the present utility model. The descriptions of the above embodiments are only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A multi-functional integrated flue gas flow equalization device, characterized in that: It includes two flue gas flow equalizing units. Each of the flue gas flow equalizing units includes a housing frame, a heat exchange module, a dust cleaning module, and an ash discharging module. The heat exchange module is installed inside the housing frame, and the water inlet and outlet of the heat exchange module are both located outside the housing frame. Water is used to flow inside the heat exchange module, and a plurality of heat exchange channels are provided in the heat exchange module. When the high-temperature flue gas from the dust collector passes through the heat exchange channels, it can exchange heat with the water inside the heat exchange module. The dust cleaning module is movably installed inside the housing frame, and the dust cleaning module is movably connected to the outer 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 housing frame. The ash discharging module is installed at the lower end of the housing frame, and the ash discharging module is used to discharge the dust entering the heat exchange channels; the two housing frames are arranged side by side along the flue gas flow direction, the two heat exchange modules are perpendicular to each other, and the two heat exchange channels are perpendicular to each other.

2. The multifunctional integrated flue gas flow equalization device according to claim 1, wherein: The longitudinal section of each of the housing frames is rectangular. The housing frame includes a top sealing plate, a dust collecting hopper, and two side sealing plates. The side sealing plates are symmetrically installed at both ends of the top sealing plate, and the side sealing plates are connected to the top sealing plate through flanges. The two ends of the dust collecting hopper are respectively installed at the lower ends of the two side sealing plates. The two housing frames can be detachably connected to form an integral outer frame, and the lower ends of the two dust collecting hoppers are respectively communicated with one of the ash discharging modules. Each of the four corners of the lower end surface of the integral outer frame is provided with a support leg, and a backing plate is respectively fixed at the lower end of each support leg.

3. The multifunctional integrated flue gas flow equalization device according to claim 2, characterized in that: The housing frame further includes a plurality of internal struts. The internal struts are divided into cross struts and longitudinal struts. The cross struts and the longitudinal struts are perpendicular to each other and fixedly connected. The two ends of the cross struts are respectively installed inside the two side sealing plates, and the two ends of the longitudinal struts are respectively installed on the top sealing plate and the dust collecting hopper. The two groups of internal struts on the two housing frames are respectively installed on the sides of the two housing frames away from each other.

4. The multifunctional integrated flue gas flow equalizing device according to claim 1, characterized in that: The heat exchange module includes an inlet manifold, a heat exchange tube group, and an outlet manifold. The heat exchange tube group is installed within the housing frame, and a plurality of heat exchange channels are provided in the heat exchange tube group. The two inlet manifolds are respectively a horizontal inlet manifold and a vertical inlet manifold, and the two outlet manifolds are respectively a horizontal outlet manifold and a vertical outlet manifold. In the two heat exchange tube groups of the two flue gas uniform flow units, one of the heat exchange tube groups extends in the vertical direction, and the horizontal inlet manifold and the horizontal outlet manifold are installed at the upper end of the corresponding housing frame. The other heat exchange tube group extends in the horizontal direction, and the vertical inlet manifold and the vertical outlet manifold are installed on one side of the corresponding housing frame. One end of the horizontal inlet manifold forms an inlet communicating with the outside, the other end of the horizontal inlet manifold is blocked, one end of the horizontal outlet manifold is blocked, the other end of the horizontal outlet manifold communicates with one end of the vertical inlet manifold, the other end of the vertical inlet manifold is blocked, one end of the vertical outlet manifold is blocked, and the other end of the vertical outlet manifold forms an outlet communicating with the outside. One side of the horizontal inlet manifold and one side of the vertical inlet manifold are respectively connected to the inlet ends of the corresponding heat exchange tube groups, and one side of the horizontal outlet manifold and one side of the vertical outlet manifold are respectively connected to the outlet ends of the corresponding heat exchange tube groups.

5. The multifunctional integrated flue gas flow equalization device according to claim 4, characterized in that: In the two heat exchange tube groups, one of the heat exchange tube groups includes a plurality of U-shaped heat exchange tubes arranged in a staggered manner in sequence along the horizontal direction. Each U-shaped heat exchange tube is perpendicular to the horizontal plane and has an angle with the vertical plane. The other heat exchange tube group includes a plurality of U-shaped heat exchange tubes arranged in a staggered manner in sequence along the vertical direction. Each U-shaped heat exchange tube is perpendicular to the vertical plane and has an angle with the horizontal plane. In the two heat exchange tube groups, the inlet ends of the U-shaped heat exchange tubes are connected to the corresponding inlet manifolds, and the outlet ends of the U-shaped heat exchange tubes are connected to the corresponding outlet manifolds.

6. The multifunctional integrated flue gas flow equalization device according to claim 5, characterized in that: In the flue gas uniform flow unit in which the extending direction of the heat exchange tube group is horizontal, the ash cleaning module includes a translation driving element and a plurality of translation scrapers. The translation scrapers extend in the vertical direction and are arranged in sequence along the horizontal direction. The translation driving element is installed on the housing frame, and each translation scraper is connected to the translation driving element and can reciprocate along the horizontal direction under the drive of the translation driving element. The translation scrapers are arranged in sequence and are sleeved on the outer circumferences of the U-shaped heat exchange tubes extending in the horizontal direction, and can scrape the dust on the outer walls of the U-shaped heat exchange tubes extending in the horizontal direction during reciprocating translation. The distance between adjacent translation scrapers is fixed.

7. The multifunctional integrated flue gas flow equalizing device according to claim 6, characterized in that: A translation upper slide rail is installed on the inner top surface of the housing frame. The lower end of the translation upper slide rail is slidably connected with a translation slide rail sleeve. The lower end of the translation slide rail sleeve is fixedly connected with the upper ends of the translation scraping plates. A translation lower slide rail is installed on the inner bottom surface of the housing frame. The translation driving element includes a translation actuator, a translation lead screw, a translation slide bar and a translation connecting rod. The translation actuator is installed at the upper end of the housing frame, and the translation actuator is connected with one end of the translation lead screw. The translation lead screw is parallel to the horizontal direction. The upper end of the translation slide bar is connected with the outer periphery of the translation lead screw. The translation slide bar is perpendicular to the horizontal direction. The lower end of the translation slide bar is connected with the middle part of the translation connecting rod. And the translation connecting rod sequentially passes through and fixes each translation scraping plate. The translation connecting rod is parallel to the horizontal plane.

8. The multifunctional integrated flue gas flow equalization device according to claim 5, wherein: In the flue gas flow equalizing unit where the extending direction of the heat exchange tube group is vertical, the ash cleaning module includes a lifting driving element and a plurality of lifting scraping plates. The lifting scraping plates extend in the horizontal direction and are arranged in sequence in the vertical direction. The lifting driving element is installed on the housing frame. And each lifting scraping plate is connected with the lifting driving element and can reciprocate in the vertical direction under the drive of the lifting driving element. Each lifting scraping plate is arranged in sequence and sleeved on the outer periphery of each U-shaped heat exchange tube extending in the vertical direction. And can scrape the dust on the outer walls of each U-shaped heat exchange tube extending in the vertical direction during reciprocating lifting. The distance between adjacent lifting scraping plates is fixed.

9. The multifunctional integrated flue gas flow equalization device according to claim 8, characterized in that: One lifting side slide rail is respectively fixed on the two inner side walls of the housing frame. The two ends of each lifting scraping plate are respectively slidably connected with the two lifting side slide rails. The lifting driving element includes a lifting actuator and a lifting connecting rod. The lifting actuator is installed at the upper end of the housing frame. And the lifting actuator is connected with the upper end of the lifting connecting rod. The lifting connecting rod sequentially passes through and fixes each lifting scraping plate. The lifting connecting rod is perpendicular to the horizontal plane.

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

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