Spiral plate heat exchange equipment

Abstract

The present invention discloses a spiral plate heat exchanger, comprising a shell body, a first end plate, a second end plate, a spiral flow channel, a partition, a material inlet, and a medium outlet. The second end plate is provided with an avoidance hole for the medium outlet to pass through. After passing through the avoidance hole, the medium outlet at least partially enters one end of the second flow channel and penetrates the sealing plate. The second end plate and the medium outlet are slidably matched, and the medium inlet, the second spiral flow channel, the second flow channel, and the medium outlet are connected. After the spiral plate heat exchanger of the present invention is used for a long time, impurities in the hot material will reside in the first spiral flow channel and need to be cleaned. During cleaning, the staff removes the first end plate and the second end plate from the shell body respectively. Since the two ends of the first spiral flow channel are open, the impurities can be pushed out from one end of the first spiral flow channel to the other end, thereby thoroughly cleaning the impurities in the first spiral flow channel, ensuring the smoothness of the first spiral flow channel, and ensuring the heat exchange efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchangers, and in particular to a spiral plate heat exchange device. Background Art

[0002] Spiral plate heat exchanger is a commonly used equipment in the field of heat exchange and is widely used in chemical, food, pharmaceutical, shipbuilding, electric power and other fields.

[0003] At present, there is a type I spiral plate heat exchanger on the market, which includes a shell body and a spiral flow channel fixed in the shell body. The interior of the shell body is a cylindrical cavity, and the spiral flow channel is fixed in the cavity of the shell body. The spiral flow channel includes a spirally encircling medium flow channel and a spirally encircling hot material flow channel. The medium flow channel and the hot material flow channel are concentric and alternately distributed from the inside to the outside. The axis of the shell body is coaxially arranged with the axis of the medium flow channel and the hot material flow channel. Among them, the first sealing strip is welded in the flow channel openings at both ends of the shell body axis of the medium flow channel, and the second sealing strip is welded in the flow channel openings at both ends of the shell body axis of the hot material flow channel. The outer wall of the spiral plate heat exchanger is respectively provided with a medium inlet, a medium outlet, a hot material inlet and a hot material outlet, wherein the medium inlet and the medium outlet are connected to the medium flow channel, and the hot material inlet and the hot material outlet are connected to the hot material flow channel.

[0004] During operation of the above-mentioned Type I spiral plate heat exchanger, the cold material medium passes through the medium inlet, medium flow channel, and medium outlet in sequence, and the hot material passes through the hot material inlet, hot material flow channel, and hot material outlet in sequence. The cold material medium and the hot material move in opposite directions in a spiral route at the same time to exchange heat. During the heat exchange process, the cold material medium absorbs the heat of the hot material by absorbing heat.

[0005] After long-term use, the above-mentioned Type I spiral plate heat exchanger will have a large amount of impurities attached to the hot material flow channel due to the presence of impurities in the hot material. Since the hot material flow channel is welded with a second sealing strip in the flow channel openings at both ends along the axis of the shell body, the hot material flow channel cannot be cleaned. After long-term use, it is bound to affect the smoothness of the flow of the hot material in the hot material flow channel, thereby affecting the heat exchange efficiency.

[0006] At present, there is also a type II spiral plate heat exchanger on the market, which includes a shell body and a spiral flow channel fixed in the shell body. The interior of the shell body is a cylindrical cavity, and the spiral flow channel is fixed in the cavity of the shell body. The spiral flow channel includes a spirally encircling medium flow channel and a spirally encircling hot material flow channel. The medium flow channel and the hot material flow channel are concentric and alternately distributed from the inside to the outside. The axis of the shell body is coaxially arranged with the axis of the medium flow channel and the hot material flow channel. Among them, the first sealing strip is welded in the flow channel openings at both ends of the medium flow channel along the axis of the shell body, and the second sealing strip is welded in the flow channel opening at one end of the hot material flow channel along the axis of the shell body. The side of the shell body away from the second sealing strip is detachably connected with a sealing cover plate. When the sealing cover plate is fastened to the shell body, the sealing cover plate seals the flow channel opening of the hot material flow channel away from the second sealing strip. When the sealing cover plate is removed from the shell body, the flow channel opening of the hot material flow channel away from the second sealing strip is open. It should be noted that the first sealing strip and the second sealing strip on the same side of the shell body can also be replaced by an end plate, which is welded to the end of the shell body to achieve sealing of the end of the hot material flow channel away from the sealing cover plate. The outer side wall of the spiral plate heat exchanger is respectively provided with a medium inlet, a medium outlet, a hot material inlet and a hot material outlet, wherein the medium inlet and the medium outlet are connected to the medium flow channel, and the hot material inlet and the hot material outlet are connected to the hot material flow channel.

[0007] During operation of the above-mentioned type II spiral plate heat exchanger, the cold material medium passes through the medium inlet, medium flow channel, and medium outlet in sequence, and the hot material passes through the hot material inlet, hot material flow channel, and hot material outlet in sequence. The cold material medium and the hot material move in opposite directions along a spiral route at the same time to exchange heat. During the heat exchange process, the cold material medium absorbs the heat of the hot material by absorbing heat.

[0008] After the above-mentioned Type II spiral plate heat exchanger has been used for a long time, due to the presence of impurities in the hot material, a large amount of impurities will be attached to the hot material flow channel. At this time, the staff opens the sealing cover plate and uses a long cleaning rod to extend into the hot material flow channel through the flow channel opening at the non-sealed end of the hot material flow channel, so as to clean the hot material flow channel by reciprocating scraping of the cleaning rod. However, since a second sealing strip or a sealing plate is welded in the flow channel opening at one end of the hot material flow channel, the cleaning rod will squeeze the impurities in the hot material flow channel to the area of ​​the hot material flow channel close to the second sealing strip and cannot be discharged from the hot material flow channel, resulting in the impurities in the hot material flow channel cannot be completely cleaned. After long-term use, it is bound to affect the smoothness of the flow of the hot material in the hot material flow channel and affect the heat exchange efficiency.

[0009] In summary, the current Type I spiral plate heat exchangers and Type II spiral plate heat exchangers cannot solve the problem of difficult cleaning of the hot material flow channel. After long-term use, impurities accumulate in the hot material flow channel, affecting the smoothness of the hot material flow in the hot material flow channel and affecting the heat exchange efficiency. Summary of the invention

[0010] The purpose of the present invention is to provide a spiral plate heat exchange equipment, which can solve the problem of difficult cleaning of impurities in the hot material flow channel in the prior art, avoid the accumulation of impurities in the hot material flow channel after long-term use, affect the smoothness of the flow of hot material in the hot material flow channel, and affect the heat exchange efficiency.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] A spiral plate heat exchange device, comprising:

[0013] A shell body, wherein a material outlet and a medium inlet are arranged on a side wall of the shell body;

[0014] A first end plate, detachably connected to one end of the housing body;

[0015] A second end plate, detachably connected to an end of the housing body away from the first end plate;

[0016] A spiral flow channel is arranged in the shell body, the spiral flow channel comprises a first spiral flow channel and a second spiral flow channel, the first spiral flow channel and the second spiral flow channel are concentric and arranged alternately from the inside to the outside, wherein the first spiral flow channel is arranged through along the axial direction of the spiral flow channel, the first end plate and the second end plate are sealed on both sides of the first spiral flow channel along the axial direction of the spiral flow channel; the second spiral flow channel is sealed at both ends along the axial direction of the spiral flow channel;

[0017] A partition, wherein the partition is fixed in the central area of ​​the spiral flow channel along the axial direction of the spiral flow channel, and the partition separates the central area of ​​the spiral flow channel into a first flow channel and a second flow channel, wherein sealing plates are respectively fixed at both ends of the second flow channel along the axial direction of the spiral flow channel;

[0018] A material inlet is connected to the first end plate, and the material inlet, the first flow channel, the first spiral flow channel, and the material outlet are in communication;

[0019] The medium outlet is provided with an avoidance hole for the medium outlet to pass through on the second end plate. After passing through the avoidance hole, the medium outlet at least partially enters one end of the second flow channel and penetrates the sealing plate. The second end plate and the medium outlet are slidably matched, and the medium inlet, the second spiral flow channel, the second flow channel, and the medium outlet are connected.

[0020] Preferably, the spiral plate heat exchanger also includes a sealing structure arranged on the avoidance hole, and the sealing structure has a first state and a second state. In the first state, there is a gap between the sealing structure and the outer wall of the medium outlet, and in the second state, the sealing structure is pressed against the outer wall of the medium outlet.

[0021] Preferably, the sealing structure includes a sealing pressure ring and a packing sealing ring, the packing sealing ring is sleeved outside the medium outlet, the sealing pressure ring is sleeved outside the medium outlet, the sealing pressure ring is detachably connected to the second end plate, and the packing sealing ring is located between the sealing pressure ring and the second end plate.

[0022] Preferably, when the distance between the sealing pressure ring and the second end plate is smaller than the thickness of the packing sealing ring in a natural state, the packing sealing ring reaches the second state so that the sealing structure is pressed against the outer side wall of the medium outlet; when the distance between the sealing pressure ring and the second end plate is greater than or equal to the thickness of the packing sealing ring in a natural state, the packing sealing ring reaches the first state so that there is a gap between the sealing structure and the outer side wall of the medium outlet.

[0023] Preferably, the outlet end of the medium outlet is detachably connected with an external flange.

[0024] Preferably, an outer wall of the outlet end of the medium outlet is provided with an external thread, an inner wall of the external flange is provided with an internal thread, and the external flange is threadedly connected to the external thread of the medium outlet.

[0025] Preferably, one of the side edges forming the second spiral flow channel is respectively bent with flanges at both ends along the axial direction of the spiral flow channel, and the flanges abut against the other side edge forming the second spiral flow channel.

[0026] Preferably, the end of the flange is fixed to the inner wall of the second spiral flow channel by welding.

[0027] Preferably, the inner angle of the flange is an obtuse angle, and the outer corner of the flange is in the form of an arc transition.

[0028] Preferably, a limiting ring is provided on the second end plate, the limiting ring is coaxially arranged with the avoidance hole, the packing sealing ring is arranged in the limiting ring, the outer wall of the packing sealing ring contacts the inner wall of the limiting ring, and the packing sealing ring is higher than the height of the limiting ring in the first state.

[0029] Compared with the prior art, the above technical solution has the following beneficial technical effects:

[0030] 1. After long-term use, due to the presence of impurities in the hot material, a large amount of impurities will be attached to the first spiral flow channel. At this time, the staff will remove the first end plate and the second end plate from the outer shell body respectively. Since the two ends of the first spiral flow channel are open, the impurities can be pushed out from one end of the first spiral flow channel to the other end of the first spiral flow channel, thereby achieving a thorough cleaning of the impurities in the first spiral flow channel, ensuring the smooth flow of the hot material in the first spiral flow channel during later use, and ensuring the heat exchange efficiency as well as the stability and service life of the equipment.

[0031] 2. The cold material medium passes through the medium inlet, the second inlet, the second spiral flow channel, and the second outlet in sequence, and then flows out through the central area of ​​the spiral flow channel; the hot material passes through the central area of ​​the spiral flow channel, the first inlet, the first spiral flow channel, and the first outlet in sequence, and then flows out through the hot material outlet. In this process, the cold material medium and the hot material flow in opposite spiral directions to achieve countercurrent heat exchange.

[0032] 3. The independent first end plate and the second end plate can be manufactured in batches during the manufacturing process, and can be set to have approximately the same pressure resistance during batch manufacturing, so that the pressure resistance at both ends of the spiral flow channel is approximately the same, thereby ensuring that the spiral plate heat exchanger of the present application has a stable pressure resistance. The staff can accurately judge the pressure value when conveying hot and cold media, and can convey them at the maximum pressure value, with high conveying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without paying any creative work.

[0034] Figure 1 It is a schematic diagram of a spiral plate heat exchanger.

[0035] Figure 2 It is a schematic diagram showing the structure of the locking assembly.

[0036] Figure 3 is an exploded schematic diagram showing the locking assembly.

[0037] Figure 4 It is a manifestation Figure 1 Enlarged view of part A in the middle.

[0038] Figure 5 It is a structural schematic diagram of the spiral flow channel.

[0039] Description of reference numerals: 1. shell body; 101. material outlet; 102. medium inlet; 103. first flange; 104. second flange; 2. first end plate; 3. second end plate; 301. avoidance hole; 4. spiral flow channel; 401. first spiral flow channel; 4011. first inlet; 4012. first outlet; 402. second spiral flow channel; 4021. second inlet; 4022. second outlet; 4023. flange; 403. first flow channel; 404. second flow channel ; 405, sealing plate; 5, partition; 6, material inlet; 7, medium outlet; 701, external flange; 8, locking assembly; 801, first locking piece; 8011, connecting part; 8012, first clamping part; 8013, locking screw; 802, second locking piece; 8021, guide part; 8022, connecting seat; 8023, second clamping part; 803, locking nut; 9, sealing structure; 901, sealing pressure ring; 902, packing sealing ring; 903, limiting ring. DETAILED DESCRIPTION

[0040] The present invention discloses a spiral plate heat exchange device, which can solve the problem of difficult cleaning of impurities in a hot material flow channel in the prior art, and avoid the accumulation of impurities in the hot material flow channel after long-term use, which affects the smoothness of the flow of hot material in the hot material flow channel and affects the heat exchange efficiency.

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1-Figure 5 The spiral plate heat exchange device of the present invention comprises a shell body 1, a first end plate 2, a second end plate 3, a spiral flow channel 4, a partition plate 5, a material inlet 6, and a medium outlet 7.

[0043] See also Figure 1 and Figure 5 The interior of the shell body 1 is a cylindrical cavity, and both ends of the shell body 1 are open. A material outlet 101 and a medium inlet 102 are fixedly connected to the side wall of the shell body 1. The material outlet 101 and the medium inlet 102 are both tubular structures, and the material outlet 101 and the medium inlet 102 are respectively connected to the internal cavity of the shell body 1.

[0044] See also Figure 1The first end plate 2 is a circular plate, and the first end plate 2 is detachably connected to one end of the shell body 1. Specifically, a first flange 103 is fixed to the open end of the shell body 1 facing the first end plate 2. The first flange 103 is annular and sleeved on the outer wall of the shell body 1. The first flange 103 and the shell body 1 can be fixed by welding or by integral molding.

[0045] See also Figure 1 The first end plate 2 covers the opening of the housing body 1 toward the first end plate 2 and the first flange 103 at the same time, that is, the outer diameter of the first end plate 2 is not less than the outer diameter of the first flange 103. The first end plate 2 is detachably connected to the first flange 103, so that the first end plate 2 is detachably connected to one end of the housing body 1.

[0046] See also Figure 1-Figure 3 The first end plate 2 and the first flange 103 are externally clamped with a locking assembly 8, and the first end plate 2 and the first flange 103 are detachably connected through the locking assembly 8. The locking assembly 8 includes a first locking member 801, a second locking member 802, and a locking nut 803.

[0047] See also Figure 2 and Figure 3 The first locking member 801 includes a connecting portion 8011, a first clamping portion 8012, and a locking screw 8013. The cross-sectional shape of the connecting portion 8011 is rectangular, and preferably, the cross-sectional shape of the connecting portion 8011 is square. The locking screw 8013 is integrally formed at one end of the connecting portion 8011, and the locking screw 8013 is coaxially arranged with the connecting portion 8011. Along the axial direction of the locking screw 8013, the projection area of ​​the connecting portion 8011 is larger than the projection of the locking screw 8013. The first clamping portion 8012 is integrally formed with the connecting portion 8011, and the first clamping portion 8012 is located at the end of the connecting portion 8011 away from the locking screw 8013, and the first clamping portion 8012 is located on the side wall of the connecting portion 8011, that is, the first clamping portion 8012 extends along a length direction perpendicular to the connecting portion 8011 and the locking screw 8013.

[0048] See also Figure 2 and Figure 3The second locking member 802 includes a guide portion 8021, a connection seat 8022, and a second pressing portion 8023. The guide portion 8021 is integrally formed on the connection seat 8022. A guide cavity is provided on the guide portion 8021. The shape of the guide cavity matches the shape of the connection portion 8011. In this way, the connection portion 8011 can slide in the guide cavity, and the outer wall of the connection portion 8011 contacts the inner wall of the guide cavity. A screw hole is passed through the connection seat 8022. The inner diameter of the screw hole matches the outer diameter of the locking screw 8013. That is, the locking screw 8013 can pass through the connection seat 8022 through the screw hole. The second pressing portion 8023 is integrally formed with the connection seat 8022. The second pressing portion 8023 is located on the side wall of the connection seat 8022, that is, the second pressing portion 8023 extends along a length direction perpendicular to the guide portion 8021.

[0049] See also Figure 2 and Figure 3 , the first pressing part 8012 and the second pressing part 8023 are located on the same side of the locking assembly 8, and their projections in the vertical direction overlap. The first end plate 2 and the first flange 103 are located between the first pressing part 8012 and the second pressing part 8023, and the locking nut 803 is threadedly connected to the locking screw 8013 passing through the connecting seat 8022. By rotating the locking nut 803, the distance between the first pressing part 8012 and the second pressing part 8023 is gradually reduced until the first end plate 2 and the first flange 103 are clamped, thereby realizing the connection between the first end plate 2 and the first flange 103; by rotating the locking nut 803 in the opposite direction, the distance between the first pressing part 8012 and the second pressing part 8023 is gradually expanded until the distance between the first pressing part 8012 and the second pressing part 8023 is much larger than the thickness of the first end plate 2 and the first flange 103, thereby realizing the disassembly between the first end plate 2 and the first flange 103.

[0050] In other embodiments, the present application does not limit the detachable connection method between the first end plate 2 and the first flange 103, as long as the convenient disassembly and assembly between the first end plate 2 and the first flange 103 can be achieved, such as snap connection, magnetic connection, etc., and for example, connection through a bolt assembly, connection through a quick caliper, etc.

[0051] See also Figure 1 The second end plate 3 is a circular plate, and the second end plate 3 is detachably connected to the end of the shell body 1 away from the first end plate 2. Specifically, the opening end of the shell body 1 facing the second end plate 3 is fixed with a second flange 104, and the second flange 104 is annular, and the second flange 104 is sleeved on the outer wall of the shell body 1. The second flange 104 and the shell body 1 can be fixed by welding or by integral molding.

[0052] See also Figure 1The second end plate 3 simultaneously covers the opening of the housing body 1 toward the second end plate 3 and the second flange 104, that is, the outer diameter of the second end plate 3 is not less than the outer diameter of the second flange 104. The second end plate 3 is detachably connected to the second flange 104, so that the second end plate 3 is detachably connected to the end of the housing body 1 away from the first end plate 2.

[0053] The detachable connection method between the second end plate 3 and the second flange 104 is the same as the detachable connection method between the first end plate 2 and the first flange 103 , and will not be described in detail herein.

[0054] See also Figure 1 and Figure 5 The spiral flow channel 4 is arranged in the shell body 1. The spiral flow channel 4 has a first spiral flow channel 4014 and a second spiral flow channel 4024. The first spiral flow channel 4014 and the second spiral flow channel 4024 are concentric and arranged alternately from the inside to the outside. One end of the first spiral flow channel 4014 along its spiral direction is the first inlet 4011, and the other end is the first outlet 4012; one end of the second spiral flow channel 4024 along its spiral direction is the second inlet 4021, and the other end is the second outlet 4022. The first inlet 4011 and the second outlet 4022 face the central area of ​​the spiral flow channel 4. The second inlet 4021 is located outside the spiral flow channel 4 and communicates with the medium inlet 102. The first outlet 4012 is located outside the spiral flow channel 4 and communicates with the material outlet 101. In this way, the cold material medium sequentially passes through the medium inlet 102, the second inlet 4021, the second spiral flow channel 4024, and the second outlet 4022, and then flows out through the central area of ​​the spiral flow channel 4; the hot material sequentially passes through the central area of ​​the spiral flow channel 4, the first inlet 4011, the first spiral flow channel 4014, and the first outlet 4012, and then flows out through the hot material outlet. In this process, the cold material medium and the hot material flow in opposite spiral directions to achieve countercurrent heat exchange.

[0055] See also Figure 1 , the first spiral flow channel 4014 is arranged through along the axial direction of the spiral flow channel 4, that is, the first spiral flow channel 4014 is open at both ends along the axial direction of the spiral flow channel 4. The first end plate 2 and the second end plate 3 are sealed on both sides of the first spiral flow channel 4014 along the axial direction of the spiral flow channel 4. In this way, the first end plate 2 and the second end plate 3 are used to seal the openings at both ends of the first spiral flow channel 4014 along the axial direction of the spiral flow channel 4, so that the first spiral flow channel 4014 forms a sealed flow channel structure.

[0056] The existing type II spiral plate heat exchanger has a form in which one end is an end plate and the other end is a sealing cover plate. The end plate is usually manufactured together with the outer shell body 1, and the sealing cover plate is manufactured separately. This results in different pressure resistance of the sealing cover plate and the end plate. Under normal circumstances, the pressure resistance of the end plate is small, and it may even deform after long-term use. Therefore, the pressure resistance of the type II spiral plate heat exchanger in the prior art is usually determined by the pressure resistance of the end plate, and the end plate cannot be manufactured separately, which results in the pressure resistance of the end plate being unable to be equal to that of the sealing cover plate. This makes the pressure resistance of the type II spiral plate heat exchanger unstable, and the staff cannot accurately judge the pressure value when conveying hot and cold media, and can only convey at the minimum pressure value, with low conveying efficiency. In the present application, the independent first end plate 2 and the second end plate 3 can be manufactured in batches during the manufacturing process, and can be set to have approximately the same pressure resistance during batch manufacturing, so that the pressure resistance at both ends of the spiral flow channel 4 is approximately the same, thereby ensuring that the spiral plate heat exchanger of the present application has a stable pressure resistance. The staff can accurately judge the pressure value when transporting hot and cold media, and can transport at the maximum pressure value, with high transportation efficiency.

[0057] See also Figure 1 , the second spiral flow channel 4024 is sealed at both ends along the axial direction of the spiral flow channel 4. Specifically, one of the sides forming the second spiral flow channel 4024 is respectively bent with flanges 4023 at both ends along the axial direction of the spiral flow channel 4, and the flange 4023 is against the other side forming the second spiral flow channel 4024. The end of the flange 4023 against the other side forming the second spiral flow channel 4024 is fixed to the inner side wall of the second spiral flow channel 4024 by welding. In this way, by welding the flange 4023 to the inner side wall of the second spiral flow channel 4024, the second spiral flow channel 4024 is sealed at both ends along the axial direction of the spiral flow channel 4, and the flange 4023 is a sealing member for sealing the two ends of the second spiral flow channel 4024.

[0058] After the spiral plate heat exchanger of the present invention is used for a long time, due to the presence of impurities in the hot material, a large amount of impurities will be attached to the first spiral flow channel 4014. At this time, the staff removes the first end plate 2 and the second end plate 3 from the outer shell body 1 respectively, and uses a long cleaning rod to extend into the first spiral flow channel 4014 through any open end of the first spiral flow channel 4014, so as to clean the first spiral flow channel 4014 by reciprocating scraping of the cleaning rod. Since the two ends of the first spiral flow channel 4014 are open, the impurities can be pushed out from one end of the first spiral flow channel 4014 to the other end of the first spiral flow channel 4014 under the reciprocating scraping of the cleaning rod, so as to achieve thorough cleaning of the impurities in the first spiral flow channel 4014, ensuring the smooth flow of the hot material in the first spiral flow channel 4014 during later use, and ensuring the heat exchange efficiency as well as the stability and service life of the equipment.

[0059] Of course, the first spiral flow channel 4014 can be cleaned without using a cleaning rod, but by flushing with water. The staff uses high-pressure water to flush into the first spiral flow channel 4014 through any open end of the first spiral flow channel 4014. Since the two ends of the first spiral flow channel 4014 are open, impurities can be flushed out from one end of the first spiral flow channel 4014 to the other end of the first spiral flow channel 4014 under the impact of high-pressure water, thereby achieving thorough cleaning of impurities in the first spiral flow channel 4014, ensuring the smooth flow of hot materials in the first spiral flow channel 4014 during later use, ensuring the heat exchange efficiency as well as the stability and service life of the equipment.

[0060] See also Figure 1 , the inner angle of the flange 4023 is an obtuse angle, and the outer corner of the flange 4023 is an arc transition. In this way, when the long strip cleaning rod is inserted into the first spiral flow channel 4014 through any open end of the first spiral flow channel 4014, the setting that the inner angle of the flange 4023 is an obtuse angle and the outer corner is an arc transition can guide the insertion of the cleaning rod, avoiding the obstacle when the cleaning rod encounters the flange 4023. Alternatively, in the process of water washing, the setting that the inner angle of the flange 4023 is an obtuse angle and the outer corner is an arc transition can guide the water flow, avoiding the retention of the water flow, thereby ensuring the cleaning efficiency.

[0061] See also Figure 1 and Figure 5The partition plate 5 is fixed in the central area of ​​the spiral flow channel 4 by welding along the axial direction of the spiral flow channel 4. The partition plate 5 divides the central area of ​​the spiral flow channel 4 into a first flow channel 403 and a second flow channel 404. The first flow channel 403 is connected to the first inlet 4011. The sealing plates 405 are respectively fixed in both ends of the second flow channel 404 along the axial direction of the spiral flow channel 4. The sealing plates 405 are welded to the inner side wall of the second flow channel 404. In this way, the flow channel of the second flow channel 404 located between the two sealing plates 405 is connected to the second outlet 4022.

[0062] See also Figure 1 and Figure 4 The second end plate 3 is provided with an avoidance hole 301 for the medium outlet 7 to pass through. After passing through the avoidance hole 301, the medium outlet 7 at least partially enters one end of the second flow channel 404 and penetrates the sealing plate 405. The medium outlet 7 is fixedly connected to the sealing plate 405 by welding. The second end plate 3 and the medium outlet 7 are slidably matched. The medium inlet 102, the second spiral flow channel 4024, the second flow channel 404, and the medium outlet 7 are connected.

[0063] The second spiral flow channel 4024 and the second flow channel 404 are flow channels for the cold material medium, which is usually cold water. The cold water itself has no impurities, so even if it flows through the second spiral flow channel 4024 and the second flow channel 404 for a long time, impurities will not accumulate in the second spiral flow channel 4024 and the second flow channel 404. The medium outlet 7 is directly fixedly connected to the sealing plate 405. When the second end plate 3 is removed, the second end plate 3 is removed from the shell body 1 along the extension direction of the medium outlet 7, but the medium outlet 7 is still retained on the sealing plate 405, so that the second spiral flow channel 4024 and the second flow channel 404 have only the medium outlet 7 opening that communicates with the outside world, and the whole except the medium outlet 7 is a sealing structure 9, thereby reducing the possibility of external impurities entering the second spiral flow channel 4024 and the second flow channel 404, ensuring the cleanliness of the second spiral flow channel 4024 and the second flow channel 404, and no staff is required to clean, thereby reducing the time and cost of later maintenance. In addition, the medium outlet 7 protrudes from the end face of the first spiral flow channel 4014. Thus, during the cleaning process of the first spiral flow channel 4014, since the medium outlet 7 protrudes from the end face of the first spiral flow channel 4014, impurities generated during the cleaning process will not easily enter the medium outlet 7, thereby further ensuring the cleanliness of the second spiral flow channel 4024 and the second flow channel 404.

[0064] See also Figure 1 The material inlet 6 is fixedly connected to the first end plate 2. A through hole communicating with the first flow channel 403 is opened on the first end plate 2. The material inlet 6 is communicated with the through hole, so that the material inlet 6, the first flow channel 403, the first spiral flow channel 4014, and the material outlet 101 are communicated.

[0065] In this way, the cold material medium sequentially passes through the medium inlet 102, the second inlet 4021, the second spiral flow channel 4024, the second outlet 4022, and the second flow channel 404, and then flows out through the medium outlet 7; the hot material sequentially passes through the hot material inlet, the second flow channel 404, the first inlet 4011, the first spiral flow channel 4014, and the first outlet 4012, and then flows out through the hot material outlet. In this process, the cold material medium and the hot material flow in opposite spiral directions to achieve countercurrent heat exchange.

[0066] See also Figure 1 and Figure 4 The spiral plate heat exchange device also includes a sealing structure 9 arranged on the avoidance hole 301. The sealing structure 9 has a first state and a second state. In the first state, there is a gap between the sealing structure 9 and the outer wall of the medium outlet 7. In the second state, the sealing structure 9 is pressed against the outer wall of the medium outlet 7. In this way, in the first state, the gap between the sealing structure 9 and the outer wall of the medium outlet 7 can make the friction between the sealing structure 9 and the outer wall of the medium outlet 7 zero, so that the sealing structure 9 can be removed from the outer shell along with the second end plate 3 along the extension direction of the medium outlet 7. In the second state, the sealing structure 9 is pressed against the outer wall of the medium outlet 7, so as to achieve the sealing of the gap between the inner wall of the avoidance hole 301 and the outer wall of the medium outlet 7, reduce the possibility of equipment pressure release, and improve the overall sealing performance of the equipment.

[0067] See also Figure 1 and Figure 4 The sealing structure 9 includes a sealing pressure ring 901 and a packing sealing ring 902. The packing sealing ring 902 is sleeved outside the medium outlet 7, the sealing pressure ring 901 is sleeved outside the medium outlet 7, the sealing pressure ring 901 is detachably connected to the second end plate 3, and the packing sealing ring 902 is located between the sealing pressure ring 901 and the second end plate 3.

[0068] See also Figure 1 and Figure 4 The sealing ring 901 is provided with bolts, and a plurality of bolts are provided along the circumferential direction. The second end plate 3 is provided with bolt holes corresponding to the plurality of bolts. The bolts pass through the sealing ring 901 and are threadedly connected to the corresponding bolt holes. The sealing ring 901 and the second end plate 3 are detachably connected by the bolts and the bolt holes.

[0069] See also Figure 1 and Figure 4In addition, the distance between the sealing pressure ring 901 and the second end plate 3 can be controlled by the depth of the bolts entering the bolt holes. When the distance between the sealing pressure ring 901 and the second end plate 3 is less than the thickness of the packing sealing ring 902 in the natural state, the packing sealing ring 902 reaches the second state, so that the sealing structure 9 is pressed against the outer wall of the medium outlet 7; when the distance between the sealing pressure ring 901 and the second end plate 3 is greater than or equal to the thickness of the packing sealing ring 902 in the natural state, the packing sealing ring 902 reaches the first state, so that there is a gap between the sealing structure 9 and the outer wall of the medium outlet 7.

[0070] See also Figure 1 and Figure 4 A limiting ring 903 is fixedly connected to the second end plate 3. The limiting ring 903 is coaxially arranged with the avoidance hole 301. The inner diameter of the limiting ring 903 is larger than the outer diameter of the medium outlet 7. The outer diameter of the limiting ring 903 is smaller than the outer diameter of the sealing pressure ring 901. The packing sealing ring 902 is arranged in the limiting ring. The outer wall of the packing sealing ring 902 contacts the inner wall of the limiting ring 903. The packing sealing ring 902 is higher than the height of the limiting ring 903 in the first state. When the sealing pressure ring 901 is pressed down to contact the limiting ring 903, the packing sealing ring 902 is pressed and enters the second state. At this time, the height of the packing sealing ring 902 is equal to the height of the limiting ring 903.

[0071] In this way, the limiting ring 903 plays a limiting role and can play a limiting role on the outside of the packing sealing ring 902 to prevent the packing sealing ring 902 from deforming and extending in the direction away from the medium outlet 7 when the sealing pressure ring 901 compresses the packing sealing ring 902. In this way, the packing sealing ring 902 can only deform and extend in the direction of the medium outlet 7, thereby achieving close contact between the packing sealing ring 902 and the medium outlet 7 and improving the sealing performance.

[0072] See also Figure 1 and Figure 4 The outlet end of the medium outlet 7 is detachably connected with an external flange 701. The external flange 701 is annular and sleeved outside the outlet end of the medium outlet 7. An external thread is provided on the outer wall of the outlet end of the medium outlet 7, and an internal thread is provided on the inner wall of the external flange 701. The external flange 701 is threadedly connected to the external thread of the medium outlet 7.

[0073] In this way, the external flange 701 is used to connect with the water pipe, and the end of the water pipe is provided with a docking flange adapted to the external flange 701, and the docking flange and the external flange 701 are connected and fastened by a bolt assembly, so as to realize a detachable connection between the water pipe and the medium outlet 7. When it is necessary to remove the second end plate 3, the staff first removes the external flange 701 from the medium outlet 7, and then removes the second end plate 3 from the shell body 1, and finally removes the second end plate 3 from the shell body 1 along the extension direction of the medium outlet 7. When installing the second end plate 3, the staff first inserts the second end plate 3 onto the medium outlet 7, and then moves the second end plate 3 toward the shell body 1 along the extension direction of the medium outlet 7 until the second end plate 3 is tightly attached to the second flange 104, and then fastens the second end plate 3 and the second flange 104.

[0074] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the method disclosed in the embodiment, since it corresponds to the device disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the device part description.

[0075] The above is a detailed introduction to a spiral plate heat exchanger provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A spiral plate heat exchange device, characterized in that: include: A shell body, wherein a material outlet and a medium inlet are arranged on a side wall of the shell body; A first end plate, detachably connected to one end of the housing body; A second end plate, detachably connected to an end of the housing body away from the first end plate; A spiral flow channel is arranged in the shell body, the spiral flow channel comprises a first spiral flow channel and a second spiral flow channel, the first spiral flow channel and the second spiral flow channel are concentric and arranged alternately from the inside to the outside, wherein the first spiral flow channel is arranged through along the axial direction of the spiral flow channel, the first end plate and the second end plate are sealed on both sides of the first spiral flow channel along the axial direction of the spiral flow channel; the second spiral flow channel is sealed at both ends along the axial direction of the spiral flow channel; A partition, wherein the partition is fixed in the central area of ​​the spiral flow channel along the axial direction of the spiral flow channel, and the partition separates the central area of ​​the spiral flow channel into a first flow channel and a second flow channel, wherein sealing plates are respectively fixed at both ends of the second flow channel along the axial direction of the spiral flow channel; A material inlet is connected to the first end plate, and the material inlet, the first flow channel, the first spiral flow channel, and the material outlet are in communication; The medium outlet is provided with an avoidance hole for the medium outlet to pass through on the second end plate. After passing through the avoidance hole, the medium outlet at least partially enters one end of the second flow channel and penetrates the sealing plate. The second end plate and the medium outlet are slidably matched, and the medium inlet, the second spiral flow channel, the second flow channel, and the medium outlet are connected.

2. The spiral plate heat exchange equipment according to claim 1, characterized in that: The spiral plate heat exchanger also includes a sealing structure arranged on the avoidance hole, and the sealing structure has a first state and a second state. In the first state, there is a gap between the sealing structure and the outer side wall of the medium outlet, and in the second state, the sealing structure is pressed against the outer side wall of the medium outlet.

3. The spiral plate heat exchange equipment according to claim 1, characterized in that: The sealing structure includes a sealing pressure ring and a packing sealing ring. The packing sealing ring is sleeved outside the medium outlet. The sealing pressure ring is sleeved outside the medium outlet. The sealing pressure ring is detachably connected to the second end plate. The packing sealing ring is located between the sealing pressure ring and the second end plate.

4. The spiral plate heat exchange equipment according to claim 3, characterized in that: When the distance between the sealing pressure ring and the second end plate is smaller than the thickness of the packing sealing ring in the natural state, the packing sealing ring reaches the second state so that the sealing structure is pressed against the outer side wall of the medium outlet; when the distance between the sealing pressure ring and the second end plate is greater than or equal to the thickness of the packing sealing ring in the natural state, the packing sealing ring reaches the first state so that there is a gap between the sealing structure and the outer side wall of the medium outlet.

5. The spiral plate heat exchange equipment according to claim 1, characterized in that: The outlet end of the medium outlet is detachably connected with an external flange.

6. The spiral plate heat exchange equipment according to claim 5, characterized in that: An outer wall of the outlet end of the medium outlet is provided with an external thread, an inner wall of the external flange is provided with an internal thread, and the external flange is threadedly connected to the external thread of the medium outlet.

7. The spiral plate heat exchange equipment according to claim 1, characterized in that: One of the side edges forming the second spiral flow channel is respectively bent with flanges at both ends along the axial direction of the spiral flow channel, and the flanges are against the other side edge forming the second spiral flow channel.

8. The spiral plate heat exchange equipment according to claim 6, characterized in that: The end of the flange is fixed to the inner wall of the second spiral flow channel by welding.

9. The spiral plate heat exchange equipment according to claim 6, characterized in that: The inner angle of the flange is an obtuse angle, and the outer corner of the flange is in the form of an arc transition.

10. The spiral plate heat exchange equipment according to claim 4, characterized in that: A limiting ring is provided on the second end plate, and the limiting ring is coaxially arranged with the avoidance hole. The packing sealing ring is arranged in the limiting ring, and the outer wall of the packing sealing ring contacts the inner wall of the limiting ring. The packing sealing ring is higher than the height of the limiting ring in the first state.

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