Sealing structure of gas-phase rotary heat exchanger and gas-phase rotary heat exchanger

Abstract

The invention relates to the technical field of grain drying, in particular to a sealing structure of a gas-phase rotary heat exchanger and the gas-phase rotary heat exchanger. The sealing structure comprises a rotary shell and gas flow distribution chambers externally embedded in the two ends of the rotary shell, and first annular butt joint grooves are formed in one ends of the inner walls of the two gas flow distribution chambers; second annular butt joint grooves are formed in one ends of the outer walls of the two airflow distribution chambers, first moving rings are fixed to the two ends of the rotating shell, the ends of the first moving rings are attached to the interiors of the first annular butt joint grooves, and sealing shaft sleeves are attached to the gaps between the exteriors of the first moving rings and the inner walls of the second annular butt joint grooves. The rotary shell can be embedded in the airflow distribution chamber to form a sealing structure of the gas-phase rotary heat exchanger, the loss amount of hot fluid at the joint of the rotary shell and the airflow distribution chamber is fully reduced, the heat exchange efficiency of the gas-phase rotary heat exchanger is guaranteed, and the sealing effect of the gas-phase rotary heat exchanger is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grain drying, and specifically discloses a sealing structure of a gas-phase rotary heat exchanger and a gas-phase rotary heat exchanger. Background Art

[0002] A heat exchanger, also known as a heat transfer exchanger, is a device that can transfer a part of the heat in a hot fluid to a cold fluid, and is also one of the indispensable devices for realizing heat exchange and heat transfer in industrial, agricultural and other production processes. In agricultural applications, heat exchangers are extremely important devices in the field of grain drying. With the development of heat exchangers, various heat exchangers have emerged, such as plate heat exchangers, plate-fin heat exchangers, plate-shell heat exchangers, umbrella-plate heat exchangers, shell-and-tube heat exchangers, double-pipe heat exchangers, and wall-type heat exchangers. Among them, the wall-type heat exchanger is the most commonly used heat exchanger in the grain drying industry in the agricultural field. It indirectly transfers the heat in the hot flue gas generated by the combustion furnace to the air, heats the air, and then blows the hot air into the drying tower to dry the grain, avoiding direct contact between the combustion furnace flue gas and the grain, thereby causing pollution to the grain. However, the existing heat exchangers for grain drying also have problems such as poor sealing, serious heat loss, low energy utilization rate, small heat transfer capacity, and low heat transfer efficiency, which seriously affect the development of the grain drying industry. Therefore, optimizing the structure of the heat exchanger and improving the heat transfer efficiency and energy utilization rate are urgent problems that need to be solved in the current grain drying industry.

[0003] In view of the above problems, the present invention has developed a gas-phase rotary shell-and-tube heat exchanger for grain drying. Starting from strengthening the heat transfer effect and reducing heat energy loss, the traditional shell-and-tube heat exchanger is improved into a shell-and-tube heat exchanger with a rotatable shell side, reducing the problems of uneven heat exchange between cold and hot fluids and low heat transfer efficiency caused by gas deposition problems in the traditional shell-and-tube heat exchanger, and improving the heat transfer efficiency of the shell-and-tube heat exchanger to a certain extent. However, due to the addition of a rotating structure, the sealing effect of the heat exchanger is affected to a certain extent, and the loss of hot fluid and heat loss of the heat exchanger relatively increase, which in turn affects the heat transfer efficiency of the shell-and-tube heat exchanger. Therefore, a sealing structure of a gas-phase rotary heat exchanger and a gas-phase rotary heat exchanger are proposed to improve the above problems. Summary of the Invention

[0004] In view of the above prior art, the technical problem to be solved by the present invention is that although the existing heat exchanger has a rotating structure, when rotating, the sealing effect of the heat exchanger is affected to a certain extent, and the loss of hot fluid and heat loss of the heat exchanger relatively increase, which in turn affects the heat transfer efficiency of the shell-and-tube heat exchanger.

[0005] To solve the above problems, the present invention provides a sealing structure for a gas-phase rotary heat exchanger, which includes a rotating housing and air flow distribution chambers externally embedded at both ends of the rotating housing. One end of the inner wall of each of the two air flow distribution chambers is provided with a first annular docking groove, and one end of the outer wall of each of the two air flow distribution chambers is provided with a second annular docking groove. First moving rings are fixed at both ends of the rotating housing, and the ends of the first moving rings are fitted in the first annular docking grooves. A sealing shaft sleeve is fitted in the gap between the outside of the first moving ring and the inner wall of the second annular docking groove, and the cross-section of the sealing shaft sleeve is designed in an L shape. The sealing shaft sleeve is composed of a first shaft sleeve half-ring and a second shaft sleeve half-ring of the same specification hinged together, and one end of the first shaft sleeve half-ring and one end of the second shaft sleeve half-ring are assembled and connected by bolts. Two second moving rings are fixed on the outer wall of the first moving ring, and two first sealing card slots for the second moving rings to be inserted into are provided on the inner wall of the thicker area of the sealing shaft sleeve. A stationary ring is fixed on the inner wall of the second annular docking groove, and a second sealing card slot for the stationary ring to be inserted into is provided on the inner wall of the thinner area of the sealing shaft sleeve.

[0006] Through the above technical solutions: a multi-folded "labyrinth" sealing phenomenon is formed at the connection between the rotating housing and the air flow distribution chamber, which fully reduces the loss of the hot fluid at the connection between the rotating housing and the air flow distribution chamber, ensures the heat exchange efficiency of the gas-phase rotary heat exchanger, and improves the sealing effect of the gas-phase rotary heat exchanger.

[0007] As a further supplement of the present application, the end edges of the two second moving rings are designed in a semi-circular concave shape, and sealing rings are fitted on the end edges of the second moving rings and the inner walls of the first sealing card slots.

[0008] Through the above technical solutions: the sealing performance is further ensured by the sealing effect of the sealing rings.

[0009] As an improvement of the present application, the air flow distribution chambers are internally embedded at both ends of the rotating housing, and the connection modes among the air flow distribution chambers, the rotating housing and the sealing shaft sleeve are opposite.

[0010] Through the above technical solutions: the rotating housing can be externally embedded on the air flow distribution chambers to form the sealing structure of the gas-phase rotary heat exchanger, providing multiple sealing and fitting modes.

[0011] A gas-phase rotary heat exchanger includes a sealing structure of the gas-phase rotary heat exchanger, and further includes a support platform arranged below the rotary housing. A rotary mechanism for driving the rotary housing to rotate is arranged on the support platform, and a support assembly for supporting the rotary housing is arranged on the support platform. Tube assemblies passing through the rotary housing are fixedly installed on the inner walls of the two gas flow distribution chambers. The other ends of the two gas flow distribution chambers are respectively installed with an air inlet hood and an air outlet hood through flanges. The air inlet of the air inlet hood is installed with a cold air inlet pipe and a first fan through flanges. The air outlet of the air outlet hood is installed with a hot air outlet pipe through a flange. A hot flue gas inlet pipe and a cold flue gas discharge pipe are respectively fixedly installed on the tops of the two gas flow distribution chambers. The hot flue gas inlet pipe is close to the air outlet hood, and the cold flue gas discharge pipe is close to the air inlet hood. The air inlet of the hot flue gas inlet pipe is installed with a hot flue gas inlet pipe, an electric furnace and a second fan through flanges. The air outlet of the cold flue gas discharge pipe is installed with a cold flue gas outlet pipe through a flange. Wind speed sensors and temperature sensors are installed on the cold air inlet pipe, the hot air outlet pipe, the hot flue gas inlet pipe and the cold flue gas outlet pipe. The rotary mechanism, the first fan, the second fan, the electric furnace, the wind speed sensor and the temperature sensor are connected to a control device. Mounting seats installed on the top of the support platform are respectively fixed at the bottoms of the two gas flow distribution chambers.

[0012] Through the above technical solutions: It avoids the problem of uneven heat transfer caused by the deposition of hot air flow at the bottom of the rotary housing, prolongs the convective heat transfer time between the hot air flow and the cold air in the tube assembly, enables the two gases to fully contact and transfer heat, and improves the heat transfer efficiency of the entire heat exchanger.

[0013] As a further supplement to the present application, the rotary mechanism includes a speed reducer fixedly installed on the support platform. One end of the speed reducer is fixedly installed with a rotary motor, and the other end of the speed reducer is fixedly installed with a driving gear. A toothed ring is fixedly installed at the middle position of the outer wall of the rotary housing, and the toothed ring meshes with the driving gear.

[0014] Through the above technical solutions: It makes the entire heat exchanger add a rotary structure on the basis of the traditional heat exchanger, thus forming a gas-phase rotary heat exchanger.

[0015] As a further supplement to the present application, the support assembly includes grooved support rings fixedly installed on both sides of the outer wall of the rotary housing. Two rollers are respectively fixedly installed on both sides of the top of the support platform. Adjacent two rollers are arranged to roll on both sides of the bottom of the same grooved support ring.

[0016] Through the above technical solutions: It can support the entire gas-phase rotary heat exchanger and ensure the stability performance.

[0017] As a further supplement to this application, a spiral guide vane is fixedly installed on the inner wall of the rotating housing, and the inner diameter of the spiral guide vane is larger than the outer diameter of the middle region of the tube bundle assembly.

[0018] Through the above technical solutions: it is possible to stir the flow direction of the hot air flow, so that the hot air flow forms a vortex inside the rotating housing, and the convective heat transfer time between the hot air flow and the cold air inside the tube bundle assembly is prolonged.

[0019] As a further supplement to this application, the tube bundle assembly includes tube sheets fixedly installed on the inner walls of the two air distribution chambers, and a plurality of straight tubes are fixedly arranged between the two tube sheets in an equidistant and annular distribution.

[0020] Through the above technical solutions: the hot air flow can contact the straight tubes, which is convenient for heat exchange with the cold air flowing on the straight tubes.

[0021] As another improvement to this application, the tube bundle assembly includes tube sheets fixedly installed on the inner walls of the two air distribution chambers, and a plurality of spiral tubes are fixedly arranged between the two tube sheets in an equidistant and annular distribution.

[0022] Through the above technical solutions: the travel of the cold air flowing through the entire gas-phase rotary heat exchanger is increased, the convective heat transfer time between the hot air flow and the cold air is further prolonged, and the heat transfer efficiency of the entire heat exchanger is further improved.

[0023] As another improvement to this application, the tube bundle assembly includes tube sheets fixedly installed on the inner walls of the two air distribution chambers, and a plurality of straight tubes are fixedly arranged between the two tube sheets in an equidistant and annular distribution. Turbulence plates are fixedly installed on the straight tubes, and notches are formed on the turbulence plates. The opening angle of the notches is 90 degrees, and the orientation of the notches rotates in multiples of 90 degrees from left to right.

[0024] Through the above technical solutions: the direction of the hot air flow flowing through the tube bundle assembly is fully changed, the degree of vortex generated by the hot air flow is increased, so that the hot air flow can more fully perform convective heat transfer with the cold air, and the heat transfer efficiency of the entire heat exchanger is further improved.

[0025] In summary, after adopting the above structure, compared with the prior art, the present invention has the following advantages:

[0026] 1. By using the cooperation of the above-mentioned rotating shell, air flow distribution chamber, sealing shaft sleeve, etc., the rotating shell can be embedded in the air flow distribution chamber to form a sealing structure of the gas-phase rotary heat exchanger. The sealing form of the "labyrinth effect" is composed of the first dynamic ring fitting with the first annular docking groove, the second dynamic ring fitting with the first sealing card slot, the static ring fitting with the second sealing card slot, the fitting effect of the sealing shaft sleeve and the sealing effect of the sealing ring, so that there are multiple tortuous "labyrinth" sealing phenomena at the connection between the rotating shell and the air flow distribution chamber. When the hot fluid passes through the tortuous "labyrinth" gap, a throttling effect is generated, which fully reduces the loss of the hot fluid at the connection between the rotating shell and the air flow distribution chamber, ensures the heat exchange efficiency of the gas-phase rotary heat exchanger, and improves the sealing effect of the gas-phase rotary heat exchanger;

[0027] 2. By using the cooperation of the above-mentioned rotating shell, air flow distribution chamber, sealing shaft sleeve, etc., the rotating shell can be externally embedded in the air flow distribution chamber to form a sealing structure of the gas-phase rotary heat exchanger, providing multiple sealing and fitting methods;

[0028] 3. By using the above-mentioned rotating shell, rotating mechanism, air flow distribution chamber, spiral guide vane and tube bundle assembly, the rotating mechanism drives the rotating shell and the spiral guide vane to rotate, so that the entire heat exchanger adds a rotating structure on the basis of the traditional heat exchanger, which can stir the hot air flowing inside the heat exchanger, making the hot air form a vortex inside the rotating shell, avoiding the problem of uneven heat exchange caused by the deposition of hot air at the bottom of the rotating shell, extending the convective heat exchange time between the hot air and the cold air in the tube bundle assembly, enabling the two gases to fully contact and transfer heat, and improving the heat exchange efficiency of the entire heat exchanger;

[0029] 4. By using the above-mentioned electric furnace, a relatively clean source of hot fluid can be provided for the entire gas-phase rotary heat exchanger, replacing the existing method of using the hot flue gas generated by a combustion furnace as the heat source, thereby avoiding the phenomenon of fouling on the inner wall of the heat exchanger and the outer wall of the tube bundle to a certain extent, preventing the increase of the heat transfer thermal resistance of the tube bundle, and ensuring the heat exchange efficiency and service life of the heat exchanger;

[0030] 5. By using the above-mentioned spiral tube bundle, the travel of the cold air flowing inside the entire gas-phase rotary heat exchanger can be increased, further extending the convective heat exchange time between the hot air and the cold air, and further improving the heat exchange efficiency of the entire heat exchanger;

[0031] 6. By using the above-mentioned spoiler and notch, the direction of the hot air flowing inside the tube bundle assembly can be fully changed through the action of the spoiler and notch, increasing the degree of vortex generated by the hot air, enabling the hot air to conduct convective heat exchange with the cold air more fully, and further improving the heat exchange efficiency of the entire heat exchanger. Description of the Drawings

[0032] Figure 1Cross-sectional view of the first embodiment of the sealing structure of a gas-phase rotary heat exchanger;

[0033] Figure 2 Exploded cross-sectional view of the first embodiment of the sealing structure of a gas-phase rotary heat exchanger;

[0034] Figure 3 Cross-sectional view of the second embodiment of the sealing structure of a gas-phase rotary heat exchanger;

[0035] Figure 4 Exploded cross-sectional view of the second embodiment of the sealing structure of a gas-phase rotary heat exchanger;

[0036] Figure 5 Stereogram of the first embodiment of a gas-phase rotary heat exchanger;

[0037] Figure 6 Schematic diagram of the support platform and rotating motor structure of the first embodiment of a gas-phase rotary heat exchanger;

[0038] Figure 7 Cross-sectional view of the rotating housing of the first embodiment of a gas-phase rotary heat exchanger;

[0039] Figure 8 Schematic diagram of the first dynamic ring and second dynamic ring structure of the first embodiment of a gas-phase rotary heat exchanger;

[0040] Figure 9 Schematic diagram of the first annular docking groove and second annular docking groove structure of the first embodiment of a gas-phase rotary heat exchanger;

[0041] Figure 10 Exploded view of the sealing shaft sleeve of the first embodiment of a gas-phase rotary heat exchanger;

[0042] Figure 11 Schematic diagram of the tube bundle assembly structure of the first embodiment of a gas-phase rotary heat exchanger;

[0043] Figure 12 System flow chart of the first embodiment of a gas-phase rotary heat exchanger;

[0044] Figure 13 Schematic diagram of the tube bundle assembly structure of the second embodiment of a gas-phase rotary heat exchanger;

[0045] Figure 14 Schematic diagram of the tube bundle assembly structure of the third embodiment of a gas-phase rotary heat exchanger;

[0046] Figure 15 Schematic diagram of the spoiler structure of the third embodiment of a gas-phase rotary heat exchanger.

[0047] Description of reference numerals in the figure:

[0048] 1. Rotating housing; 101. First moving ring; 102. Second moving ring; 2. Support platform; 3. Rotating mechanism; 301. Reducer; 302. Rotating motor; 303. Driving gear; 304. Ring gear; 4. Support assembly; 401. Roller; 402. Grooved support ring; 5. Sealing shaft sleeve; 501. First half shaft sleeve; 502. Second half shaft sleeve; 503. First sealing groove; 504. Second sealing groove; 6. Air flow distribution chamber; 601. First annular docking groove; 602. Second annular docking groove; 603. Stationary ring; 7. Exhaust hood; 8. Hot flue gas inlet pipe; 9. Cold flue gas discharge pipe; 10. Intake hood; 11. Mounting seat; 12. Spiral guide vane; 13. Tube bundle assembly; 1301. Tube sheet; 1302. Straight tubes; 1303. Spiral tubes; 1304. Turbulence plate; 1305. Notch; 14. Sealing ring. Detailed implementation manners

[0049] The technical solutions of this patent will be further described in detail below in conjunction with the specific implementation manners.

[0050] The embodiments of this patent will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain this patent and should not be construed as a limitation of this patent.

[0051] In the description of this patent, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this patent.

[0052] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0053] The present invention provides a sealing structure for a gas-phase rotary heat exchanger. For the first implementation manner, please refer to Figure 1 and Figure 2, including a rotating housing 1 and gas flow distribution chambers 6 externally fitted at both ends of the rotating housing 1. At one end of the inner walls of the two gas flow distribution chambers 6, first annular docking grooves 601 are provided. At one end of the outer walls of the two gas flow distribution chambers 6, second annular docking grooves 602 are provided. At both ends of the rotating housing 1, first moving rings 101 are fixed, and the ends of the first moving rings 101 are fitted in the first annular docking grooves 601. A sealing shaft sleeve 5 is fitted in the gap between the outside of the first moving rings 101 and the inner walls of the second annular docking grooves 602, and the cross-section of the sealing shaft sleeve 5 is designed in an L shape. The sealing shaft sleeve 5 is composed of first shaft sleeve half-rings 501 and second shaft sleeve half-rings 502 of the same specification, which are hinged together, and one end of the first shaft sleeve half-ring 501 and one end of the second shaft sleeve half-ring 502 are assembled and connected by bolts. Two second moving rings 102 are fixed to the outer walls of the first moving rings 101, and two first sealing card slots 503 for the second moving rings 102 to be inserted into are provided in the inner walls of the thicker regions of the sealing shaft sleeve 5. A stationary ring 603 is fixed to the inner wall of the second annular docking groove 602, and a second sealing card slot 504 for the stationary ring 603 to be inserted into is provided in the inner wall of the thinner region of the sealing shaft sleeve 5. The end edges of the two second moving rings 102 are designed in a semi-circular concave shape, and sealing rings 14 are fitted between the end edges of the second moving rings 102 and the inner walls of the first sealing card slots 503, which can embed the rotating housing 1 in the gas flow distribution chambers 6 to form a sealing structure of the gas-phase rotary heat exchanger. The sealing form of the "labyrinth effect" is formed by the fitting of the first moving rings 101 with the first annular docking grooves 601, the fitting of the second moving rings 102 with the first sealing card slots 503, the fitting of the stationary rings 603 with the second sealing card slots 504, the fitting effect of the sealing shaft sleeve 5, and the sealing effect of the sealing rings 14, which can fully reduce the loss amount of the hot fluid at the connection between the rotating housing 1 and the gas flow distribution chambers 6, ensure the heat exchange efficiency of the gas-phase rotary heat exchanger, and improve the sealing effect of the gas-phase rotary heat exchanger.

[0054] The present invention provides a sealing structure of a gas-phase rotary heat exchanger, the second embodiment. Please refer to Figure 3 and Figure 4 , in this embodiment, compared with the first embodiment, the gas flow distribution chambers 6 are embedded at both ends of the rotating housing 1, and the connection manners between the gas flow distribution chambers 6, the rotating housing 1, and the sealing shaft sleeve 5 are opposite, which can embed the rotating housing 1 outside the gas flow distribution chambers 6 to form a sealing structure of the gas-phase rotary heat exchanger, providing multiple sealing fitting manners.

[0055] A gas-phase rotary heat exchanger includes a sealing structure of a gas-phase rotary heat exchanger, the first embodiment. Please refer to Figures 1 - 12, further comprising a support platform 2 disposed below the rotating housing 1, a rotating mechanism 3 for driving the rotation of the rotating housing 1 is provided on the support platform 2, a support assembly 4 for supporting the rotating housing 1 is provided on the support platform 2, the inner walls of the two air flow distribution chambers 6 are fixedly installed with a tube bundle assembly 13 passing through the rotating housing 1, the other ends of the two air flow distribution chambers 6 are respectively installed with an air inlet hood 10 and an air outlet hood 7 through flanges, and the air inlet of the air inlet hood 10 is installed with a cold air inlet pipe and a first fan through flanges, the air outlet of the air outlet hood 7 is installed with a hot air outlet pipe through flanges, the tops of the two air flow distribution chambers 6 are respectively fixedly installed with a hot flue gas inlet pipe 8 and a cold flue gas discharge pipe 9, and the hot flue gas inlet pipe 8 is close to the air outlet hood 7, the cold flue gas discharge pipe 9 is close to the air inlet hood 10, the air inlet of the hot flue gas inlet pipe 8 is installed with a hot flue gas inlet pipe, an electric furnace and a second fan through flanges, and the air outlet of the cold flue gas discharge pipe 9 is installed with a cold flue gas outlet pipe through flanges. Wind speed sensors and temperature sensors are installed on the cold air inlet pipe, the hot air outlet pipe, the hot flue gas inlet pipe and the cold flue gas outlet pipe, and the rotating mechanism 3, the first fan, the second fan, the electric furnace, the wind speed sensors and the temperature sensors are connected to a control device. The bottoms of the two air flow distribution chambers 6 are respectively fixed with mounting seats 11 installed on the top of the support platform 2. The rotating mechanism 3 includes a speed reducer 301 fixedly installed on the support platform 2, and a rotating motor 302 is fixedly installed at one end of the speed reducer 301, a driving gear 303 is fixedly installed at the other end of the speed reducer 301, a gear ring 304 is fixedly installed at the middle position of the outer wall of the rotating housing 1, and the gear ring 304 meshes with the driving gear 303. The support assembly 4 includes grooved support rings 402 fixedly installed on both sides of the outer wall of the rotating housing 1, and two rollers 401 are respectively fixedly installed on both sides of the top of the support platform 2. Adjacent two rollers 401 are rotatably arranged on both sides of the bottom of the same grooved support ring 402. A spiral guide vane 12 is fixedly installed on the inner wall of the rotating housing 1, and the inner diameter of the spiral guide vane 12 is larger than the outer diameter of the middle area of the tube bundle assembly 13. The tube bundle assembly 13 includes tube sheets 1301 fixedly installed on the inner walls of the two air flow distribution chambers 6, and multiple columns of equally spaced straight tubes 1302 are fixedly arranged in a ring shape between the two tube sheets 1301. By driving the driving gear 303 to rotate through the rotating motor 302, and cooperating with the meshing action of the driving gear 303 and the gear ring 304 to drive the rotating housing 1 and the spiral guide vane 12 to rotate, the whole heat exchanger adds a rotating structure on the basis of the traditional heat exchanger, thus forming a gas-phase rotary heat exchanger, which can stir the hot air flowing inside the heat exchanger, so that the hot air forms a vortex inside the rotating housing 1, avoiding the problem of uneven heat transfer caused by the deposition of hot air at the bottom of the rotating housing 1, prolonging the convective heat transfer time between the hot air and the cold air in the tube bundle assembly 13, enabling the two gases to fully contact and transfer heat, improving the heat transfer efficiency of the whole heat exchanger, and using an electric furnace to provide a relatively clean source of hot fluid for the whole gas-phase rotary heat exchanger, to a certain extent, avoiding the phenomenon of scaling on the inner wall of the heat exchanger and the outer wall of the tubes.Ensure the heat exchange efficiency and service life of the heat exchanger.

[0056] In summary, the working principle of the present invention is as follows: The user sets the temperature of the electric furnace and the wind speeds of the first fan and the second fan through the control device, the wind speed sensor, and the temperature sensor, and then starts the electric furnace. After the electric furnace is preheated to the set temperature, the user starts the first fan and the second fan. The second fan blows air into the electric furnace for heating, so that the heated hot air flow enters the shell side of the heat exchanger from the electric furnace through the hot flue gas inlet pipe. The first fan blows cold air along the air inlet hood 10 into the straight tube bundles 1302 of the heat exchanger, so that the cold air exchanges heat with the hot air flow and then blows out of the heat exchanger along the air outlet hood 7, and then enters the grain drying industry through the hot air outlet pipe to dry the grain. During the heat exchange process, the user starts the rotating motor 302 in the rotating mechanism 3 through the control device. The rotating motor 302 drives the driving gear 303 to rotate, and drives the rotating shell 1 and the spiral guide vane 12 to rotate through the meshing action of the driving gear 303 and the gear ring 304, so that the entire heat exchanger adds a rotating structure on the basis of the traditional heat exchanger, thus forming a gas-phase rotating heat exchanger, which can stir the hot air flow flowing inside the heat exchanger, so that the hot air flow forms a vortex inside the rotating shell 1, prolong the convective heat exchange time between the hot air flow and the cold air in the tube bundle assembly 13, enable the two gases to fully contact and transfer heat, and moreover, through the connection of the first shaft sleeve half-ring 501 and the second shaft sleeve half-ring 502 in the sealing shaft sleeve 5, the rotating shell 1 can be embedded in the air flow distribution chamber 6 to form a sealing structure of the gas-phase rotating heat exchanger, forming a multi-folded sealing phenomenon, and reducing the loss amount of the hot fluid at the connection between the rotating shell 1 and the air flow distribution chamber 6.

[0057] A gas-phase rotating heat exchanger, applied to a sealing structure of a gas-phase rotating heat exchanger, the second embodiment, please refer to Figure 13 In this embodiment, compared with the first embodiment, the tube bundle assembly 13 includes tube sheets 1301 fixedly installed on the inner walls of the two air flow distribution chambers 6, and a plurality of columns of equally spaced spiral tube bundles 1303 are fixed between the two tube sheets 1301. The spiral tube bundles 1303 increase the travel of the cold air flowing through the entire gas-phase rotating heat exchanger, further prolong the convective heat exchange time between the hot air flow and the cold air, and further improve the heat exchange efficiency of the entire heat exchanger.

[0058] A gas-phase rotating heat exchanger, applied to a sealing structure of a gas-phase rotating heat exchanger, the third embodiment, please refer to Figure 14 and Figure 15, in this embodiment compared with the first embodiment, the tube bundle assembly 13 includes tube sheets 1301 fixedly installed on the inner walls of two air flow distribution chambers 6, and multiple columns of straight tubes 1302 are fixedly arranged between the two tube sheets 1301 at equal distances and distributed in a ring shape. Turbulence plates 1304 are fixedly arranged on the straight tubes 1302 at equal distances. Notches 1305 are formed on the turbulence plates 1304. The opening angle of the notch 1305 is 90 degrees, and the orientation of the notch 1305 rotates in multiples of 90 degrees from left to right. By means of the turbulence plates 1304 and the notches 1305, the direction of the hot air flowing inside the tube bundle assembly 13 is fully changed, and the degree of eddy current generated by the hot air is increased, so that the hot air can be more fully convectively heat-exchanged with the cold air.

[0059] Combined with the current actual requirements, the above-mentioned embodiments adopted in this application are not limited in the scope of protection. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A sealing structure of a gas-phase rotary heat exchanger, comprising a rotating housing (1) and air flow distribution chambers (6) externally embedded at both ends of the rotating housing (1), characterized in that: One end of the inner wall of each of the two air flow distribution chambers (6) is provided with a first annular docking groove (601), and one end of the outer wall of each of the two air flow distribution chambers (6) is provided with a second annular docking groove (602). Both ends of the rotating housing (1) are fixed with a first moving ring (101), and the end of the first moving ring (101) fits into the first annular docking groove (601). A sealing shaft sleeve (5) is fitted in the gap between the outside of the first moving ring (101) and the inner wall of the second annular docking groove (602), and the cross-section of the sealing shaft sleeve (5) is designed in an L shape. The sealing shaft sleeve (5) is composed of a first shaft sleeve half-ring (501) and a second shaft sleeve half-ring (502) of the same specification that are hinged together, and one end of the first shaft sleeve half-ring (501) and one end of the second shaft sleeve half-ring (502) are assembled and connected by bolts. Two second moving rings (102) are fixed to the outer wall of the first moving ring (101), and two first sealing card slots (503) for the second moving rings (102) to be inserted into are provided on the inner wall of the thicker area of the sealing shaft sleeve (5). A stationary ring (603) is fixed to the inner wall of the second annular docking groove (602), and a second sealing card slot (504) for the stationary ring (603) to be inserted into is provided on the inner wall of the thinner area of the sealing shaft sleeve (5).

2. The sealing structure of a gas-phase rotary heat exchanger according to claim 1, characterized in that: The end edges of the two second moving rings (102) are designed in a semi-circular concave shape, and sealing rings (14) are fitted to both the end edges of the second moving rings (102) and the inner wall of the first sealing card slot (503).

3. The sealing structure of a gas-phase rotary heat exchanger according to claim 2, characterized in that: The air flow distribution chambers (6) are embedded at both ends of the rotating housing (1), and the connection methods between the air flow distribution chambers (6), the rotating housing (1) and the sealing shaft sleeve (5) are opposite to each other.

4. A gas-phase rotary heat exchanger, comprising the sealing structure of a gas-phase rotary heat exchanger according to any one of claims 1-2, characterized in that: It further includes a support platform (2) arranged below the rotating housing (1). A rotating mechanism (3) for driving the rotation of the rotating housing (1) is arranged on the support platform (2), and a support component (4) for supporting the rotating housing (1) is arranged on the support platform (2). The inner walls of the two air flow distribution chambers (6) are fixedly installed with a tube bundle component (13) passing through the rotating housing (1). The other ends of the two air flow distribution chambers (6) are respectively installed with an air inlet hood (10) and an air outlet hood (7) through flanges. The air inlet of the air inlet hood (10) is installed with a cold air inlet pipe and a first fan through flanges, and the air outlet of the air outlet hood (7) is installed with a hot air outlet pipe through a flange. The tops of the two air flow distribution chambers (6) are respectively fixedly installed with a hot flue gas inlet pipe (8) and a cold flue gas discharge pipe (9). The hot flue gas inlet pipe (8) is close to the air outlet hood (7), and the cold flue gas discharge pipe (9) is close to the air inlet hood (10). The air inlet of the hot flue gas inlet pipe (8) is installed with a hot flue gas inlet pipe, an electric furnace and a second fan through flanges, and the air outlet of the cold flue gas discharge pipe (9) is installed with a cold flue gas outlet pipe through a flange. Wind speed sensors and temperature sensors are installed on the cold air inlet pipe, the hot air outlet pipe, the hot flue gas inlet pipe and the cold flue gas outlet pipe. The rotating mechanism (3), the first fan, the second fan, the electric furnace, the wind speed sensors and the temperature sensors are connected to a control device. The bottoms of the two air flow distribution chambers (6) are respectively fixed with mounting seats (11) installed on the top of the support platform (2).

5. The gas-phase rotary heat exchanger according to claim 4, wherein: The rotating mechanism (3) includes a speed reducer (301) fixedly installed on the support platform (2). One end of the speed reducer (301) is fixedly installed with a rotating motor (302), and the other end of the speed reducer (301) is fixedly installed with a driving gear (303). A gear ring (304) is fixedly installed at the middle position of the outer wall of the rotating housing (1), and the gear ring (304) meshes with the driving gear (303).

6. The gas-phase rotary heat exchanger according to claim 5, characterized in that: The support component (4) includes grooved support rings (402) fixedly installed on both sides of the outer wall of the rotating housing (1). Two rollers (401) are respectively fixedly installed on both sides of the top of the support platform (2), and two adjacent rollers (401) are arranged to roll on both sides of the bottom of the same grooved support ring (402).

7. The gas-phase rotary heat exchanger according to claim 6, wherein: The inner wall of the rotating housing (1) is fixedly installed with spiral guide vanes (12), and the inner diameter of the spiral guide vanes (12) is larger than the outer diameter of the middle area of the tube bundle component (13).

8. The gas-phase rotary heat exchanger according to claim 7, characterized in that: The tube bundle component (13) includes tube plates (1301) fixedly installed on the inner walls of the two air flow distribution chambers (6), and a plurality of columns of straight tubes (1302) are fixedly arranged in an equidistant annular distribution between the two tube plates (1301).

9. The gas-phase rotary heat exchanger according to claim 7, wherein: The tube bundle component (13) includes tube plates (1301) fixedly installed on the inner walls of the two air flow distribution chambers (6), and a plurality of columns of spiral tubes (1303) are fixedly arranged in an equidistant annular distribution between the two tube plates (1301).

10. A gas-phase rotary heat exchanger according to claim 7, characterized in that: The tube bundle assembly (13) includes tube sheets (1301) fixedly installed on the inner walls of the two air flow distribution chambers (6), and a plurality of straight tubes (1302) are fixedly arranged between the two tube sheets (1301) in multiple columns at equal distances and distributed in a ring shape. Turbulence plates (1304) are fixedly arranged at equal distances on the straight tubes (1302). Notches (1305) are formed on the turbulence plates (1304). The opening angle of the notch (1305) is 90 degrees, and the orientation of the notch (1305) rotates in multiples of 90 degrees from left to right.

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