Plate type heat exchange device for ammonium sulfate production

Abstract

The invention relates to the technical field of plate heat exchange, and provides a plate heat exchange device for ammonium sulfate production, which comprises a heat exchange box body, a plurality of heat exchange plates are arranged in the heat exchange box body, and a plurality of fluid heating pipelines and a plurality of fluid cooling pipelines are respectively arranged between the heat exchange box body and the plurality of heat exchange plates; a position adjusting structure used for adjusting the position of the pushing and injecting cylinder is arranged on one side of the heat exchange box body and used for enabling the pushing and injecting cylinder to correspond to the fluid heating pipelines or the fluid cooling pipelines, and the position adjusting structure is used for adjusting the position of the pushing and injecting cylinder and enabling the pushing and injecting cylinder to correspond to the fluid heating pipelines or the fluid cooling pipelines. A spiral circulation structure is arranged on the side, close to the heat exchange box, of the pushing and injecting barrel. By means of the technical scheme, the technical problems that in the sodium sulfate production process in the prior art, after a plate type heat exchange device conducts heat exchange on two kinds of raw material melt, the temperature needed by the raw material melt is not increased enough, and chemical crystals are retained in the plate type heat exchange device in the heat exchange process are solved.

Description

TECHNICAL FIELD

[0001] The embodiment of the application relates to the technical field of plate heat exchange, in particular to a plate heat exchange device for ammonium sulfate production. BACKGROUND

[0002] Ammonium sulfate is an important and common inorganic compound, which is mainly made by neutralization reaction of ammonia and sulfuric acid, and also obtained in coal and coking industries. The most important use of ammonium sulfate is in agricultural production, which is mainly produced as nitrogen fertilizer to provide plants with two main nutrients of nitrogen and sulfur, and can also be used as a chemical raw material and widely used in many fields in daily life.

[0003] In the production process of ammonium sulfate, neutralization method is generally used to produce ammonium sulfate. After evaporation, crystallization, drying and screening operations of the liquid raw melt, ammonium sulfate raw particles are produced. In the evaporation, crystallization and drying operations of the liquid raw melt, the temperature of the melt is changed to match the temperature of the corresponding process. Therefore, plate heat exchange devices are generally equipped on the ammonium sulfate production line to realize heat exchange between two raw melts processed by different processes and having large temperature difference, so as to neutralize the raw melt.

[0004] However, in the prior art, when the two melts with different temperatures are heat exchanged, the raw melt which needs to be heated after heat exchange does not reach the required heating temperature of the corresponding process, and additional heating operation of the raw melt is still needed, which delays the conveying and processing speed of the raw melt. In the heat exchange process of the raw melt in the plate heat exchange device, chemical substances in the raw melt may crystallize, and the chemical crystals may be retained in the plate heat exchange device, affecting the heat exchange efficiency of the subsequent plate heat exchange device. SUMMARY

[0005] To overcome the above defects, the embodiment of the application provides a plate heat exchange device for ammonium sulfate production, which solves the technical problems of insufficient temperature increase of the raw melt after heat exchange of the plate heat exchange device for two raw melts in the prior art sodium sulfate production process and chemical crystallization retained in the plate heat exchange device in the heat exchange process.

[0006] The plate heat exchange device for ammonium sulfate production provided by the application comprises a heat exchange box body, a plurality of heat exchange plates are arranged in the heat exchange box body, a plurality of fluid heating pipelines and a plurality of fluid cooling pipelines are arranged between the heat exchange box body and the plurality of heat exchange plates, the fluid heating pipelines and the fluid cooling pipelines correspond to each other, and the plate heat exchange device further comprises: The push injection cylinder is provided with a position adjusting structure on one side of the heat exchange box for adjusting the position of the push injection cylinder, so as to make the push injection cylinder correspond to the fluid heating pipeline or the fluid cooling pipeline; The push injection cylinder is provided with a spiral flow structure on one side close to the heat exchange box, which enters the fluid heating pipeline or the fluid cooling pipeline through the push injection cylinder to adjust the temperature of the raw material melt, and the push injection cylinder is provided with a fluid circulation assembly for realizing fluid circulation operation. The spiral flow structure is provided with a fluid spraying assembly in communication thereon, which utilizes fluid to carry out chemical crystallization discharge.

[0007] In order to realize the closing of the fluid heating pipeline and the fluid cooling pipeline, further, a pipeline closing assembly and a closing valve are further included, the fluid heating pipeline and the fluid cooling pipeline are provided with an inlet on one side close to the push injection cylinder, the fluid heating pipeline and the fluid cooling pipeline are provided with the pipeline closing assembly on one side close to the push injection cylinder, and the fluid heating pipeline and the fluid cooling pipeline are provided with the closing valve on one side away from the push injection cylinder, wherein the side wall of the fluid heating pipeline and the fluid cooling pipeline is respectively provided with an inlet interface and a discharge interface in communication.

[0008] In order to realize the XYZ axis direction movement of the push injection cylinder, further, the position adjusting structure includes a bottom sliding groove frame, a lateral lifting groove frame and a mounting box, the first sliding frame is transversely and slidingly connected on the bottom sliding groove frame, the second sliding frame is longitudinally and slidingly connected on the lateral lifting groove frame, the mounting box is slidingly arranged between the first sliding frame and the second sliding frame, the sliding plate is fixedly connected on the mounting box, the push injection cylinder is slidingly connected on the sliding plate, and the lateral driving assembly for driving the lateral movement of the push injection cylinder is arranged in the mounting box.

[0009] In order to change the temperature of the raw material melt in the pipeline, further, the spiral flow structure includes a fixed ring plate, an annular cylinder and a spiral conveying pipeline, two fixed ring plates are fixedly sleeved on one side of the push injection cylinder close to the heat exchange box, the annular cylinder is fixedly connected to one end of the two fixed ring plates in correspondence, and a plurality of spiral conveying pipelines are in communication between the two annular cylinders.

[0010] In order to process the fluid in the pipeline, further, two closed ring plates are fixedly sleeved on the middle part of the push injection cylinder, a conveying cylinder for conveying a suction pipeline is in communication between the bottoms of the two closed ring plates, and closed covers are arranged on both sides of the conveying cylinder.

[0011] In order to realize the circulation of the heating fluid, further, the fluid circulation assembly comprises a filling sleeve and a discharge cylinder, the filling sleeve is arranged in the injection cylinder, a liquid inlet pipe is communicated with the filling sleeve, a plurality of liquid injection joints are communicated between the filling sleeve and one of the annular cylinders, the discharge cylinder is arranged in the injection cylinder and close to one side of the heat exchange box, a liquid discharge pipe is communicated with the discharge cylinder, and the other annular cylinder is communicated with the discharge cylinder through a communication pipe.

[0012] In order to remove chemical crystals in the pipeline, further, the fluid spraying assembly comprises a communication cylinder and a water pipe, the communication cylinder is communicated with the discharge cylinder, the communication cylinder is fixedly connected to one side of the injection cylinder, a plurality of water pipes are communicated with the top of the communication cylinder, and arc-shaped spray heads are communicated with the water pipes.

[0013] In order to close the fluid heating pipeline and the fluid cooling pipeline, further, the pipeline closing assembly comprises an annular frame, a closing circular plate and a screw driving element, the fluid heating pipeline and the fluid cooling pipeline are fixedly sleeved with the annular frame close to one side of the injection cylinder, the closing circular plate is provided with an annular protrusion close to one end of the annular frame, the annular protrusion is slidingly arranged in the annular frame, and the screw driving element is arranged between the annular frame and the closing circular plate.

[0014] In order to drive the injection cylinder to move transversely, further, the transverse driving assembly comprises a driving box and an arc-shaped clamping plate, the driving box is fixedly connected in the mounting box, a transverse movement box is slidingly connected in the driving box, two arc-shaped clamping plates are symmetrically arranged in the transverse movement box, and driving electric cylinders are arranged on both sides of the transverse movement box, and the output ends of the driving electric cylinders are fixedly connected with the arc-shaped clamping plates.

[0015] In order to receive the fluid discharged from the fluid heating pipeline and the fluid cooling pipeline, further, arc-shaped liquid receiving grooves are fixedly connected to the bottoms of the fluid heating pipeline and the fluid cooling pipeline close to one side of the injection cylinder.

[0016] The embodiment of the present application has the following beneficial effects: 1. In the present application, in the production process of ammonium sulfate, the temperature of the raw material melt processed through different processes is not consistent, two kinds of raw material melts with large temperature difference are respectively added into the corresponding fluid heating pipeline and fluid cooling pipeline, the temperature of the two kinds of raw material melts is neutralized under the action of the heat exchange plate, and in the heat exchange process, when the temperature of the raw material melt with lower temperature is raised, it is difficult to meet the temperature rising requirement, the moving push injection cylinder is used to move the spiral flow structure into the fluid cooling pipeline, so that the flow temperature of the raw material melt in the fluid cooling pipeline is maintained, and the raw material melt flowing in the fluid heating pipeline is ensured to rise to a sufficient temperature, and in the subsequent heat exchange process, the raw material melt in the fluid cooling pipeline is still lowered to a suitable temperature.

[0017] 2. In the present application, in the heat exchange process of the raw material melt in the fluid cooling pipeline and the fluid heating pipeline, a small amount of raw material melt is retained in the pipeline, and in the static process, the raw material melt is crystallized due to the lower temperature, and the crystallization in the fluid cooling pipeline is more serious, the spiral flow structure can be moved into the fluid cooling pipeline or the fluid heating pipeline, the high-temperature fluid is added into the fluid cooling pipeline or the fluid heating pipeline, the fluid carries the liquid after crystallization and dissolution, and the liquid is discharged from the fluid cooling pipeline or the fluid heating pipeline, so that the problem of poor flow of the melt in the fluid cooling pipeline or the fluid heating pipeline is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some example embodiments of the present application. Those skilled in the art can obtain other drawings according to the contents of the example embodiments of the present application and the drawings without creating any creative labor.

[0019] Figure 1 It is a schematic view of the structure of the whole application; Figure 2 It is a schematic view of the structure of the local section of the application; Figure 3 It is a schematic view of the structure of the local section of the application; Figure 4 It is a schematic view of the structure of the local section of the application; Figure 3 Figure 5 ​The partial sectional structure schematic diagram of the position adjusting structure, the push injection cylinder and the spiral flow structure in the application; Figure 6 The partial sectional plane structure schematic diagram of the position adjusting structure, the push injection cylinder and the spiral flow structure in the application; Figure 7 The partial sectional structure schematic diagram of the push injection cylinder, the installation box, the spiral flow structure and the fluid spraying structure in the application; Figure 8 The partial sectional structure schematic diagram of the push injection cylinder, the fluid circulation assembly, the spiral flow structure and the fluid spraying assembly in the application; Figure 9 The partial sectional structure schematic diagram of the discharge cylinder, the communication cylinder, the water pipe and the arc-shaped spraying head in the application; Figure 10 The structure schematic diagram of the transverse moving box, the arc-shaped clamping plate and the driving electric cylinder in the application.

[0020] In the figure: 1, heat exchange box; 2, heat exchange plate; 3, fluid temperature rising pipeline; 4, fluid temperature reducing pipeline; 5, push injection cylinder; 6, closing valve; 7, entering interface; 8, discharging interface; 9, bottom sliding groove frame; 10, first sliding frame; 11, lateral lifting groove frame; 12, second sliding frame; 13, installation box; 14, sliding plate; 15, fixed ring plate; 16, annular cylinder; 17, spiral conveying pipeline; 18, closing ring plate; 19, conveying cylinder; 20, closing cover; 21, filling sleeve; 22, liquid inlet pipe; 23, liquid injection connector; 24, discharge cylinder; 25, liquid discharge pipe; 26, communication cylinder; 27, water pipe; 28, arc-shaped spraying head; 29, annular frame; 30, closing round plate; 31, driving box; 32, transverse moving box; 33, arc-shaped clamping plate; 34, driving electric cylinder; 35, arc-shaped liquid receiving groove frame; 36, driving screw; 37, threaded protrusion; 38, transmission screw; 39, first driving motor; 40, lifting sliding plate; 41, second electric cylinder; 42, curved sliding frame; 43, driving screw; 44, second driving motor; 45, spiral cylinder base; 46, threaded closing cap; 47, threaded push rod. DETAILED DESCRIPTION The application will be further described below in conjunction with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the application, and are not a limitation of the application.

[0021] For the purpose of clarity, only the parts of the apparatus that are pertinent to the disclosure have been shown in the drawings, and they do not necessarily represent the actual configuration or structure of the product. In addition, in some of the drawings, only one of the components having the same structure or function is shown schematically, or only one of them is labeled, in order to make the drawings simple and easy to understand. In this document, "one" means not only "only one", but also "more than one", and "several" includes "two" and "more than two".

[0022] In this document, unless otherwise explicitly specified and limited, the terms "mount", "connect", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of the first feature to the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is higher than the second feature in horizontal height. "Under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is lower than the second feature in horizontal height.

[0024] In the description of the present embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0025] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] As Figures 1 to 10As shown, the present application discloses a kind of plate heat exchange device for ammonium sulfate production, including heat exchange box body 1, multiple heat exchange plates 2 are provided in heat exchange box body 1, multiple fluid temperature raising pipelines 3 and multiple fluid temperature reducing pipelines 4 are respectively provided between heat exchange box body 1 and multiple heat exchange plates 2, fluid temperature raising pipeline 3 and fluid temperature reducing pipeline 4 are one-to-one correspondence, when needing to carry out heat exchange operation to two different temperature raw material melts produced in ammonium sulfate production process, make two raw material melts be transported from different directions of heat exchange box body 1 to fluid temperature raising pipeline 3 or fluid temperature reducing pipeline 4, make two temperature raw material melts flow in heat exchange box body 1, make two temperature raw material melts after entering into fluid temperature raising pipeline 3 or fluid temperature reducing pipeline 4 respectively, start to carry out heat exchange operation, and the time period of the temperature difference of two raw material melts is maximum is just when entering into fluid temperature raising pipeline 3 or fluid temperature reducing pipeline 4, but along with two raw material melts continue to flow in fluid temperature raising pipeline 3 or fluid temperature reducing pipeline 4, the temperature of two raw material melts starts neutralization, the area of fluid temperature raising pipeline 3 or fluid temperature reducing pipeline 4 in heat exchange box body 1 is larger in diameter, convenient for heat exchange operation; Also including pipeline closing assembly and closing valve 6, the side of fluid temperature raising pipeline 3 and fluid temperature reducing pipeline 4 close to push injection cylinder body 5 is provided with inlet, the side of fluid temperature raising pipeline 3 and fluid temperature reducing pipeline 4 close to push injection cylinder body 5 is provided with pipeline closing assembly, pipeline closing assembly includes annular frame 29, closing round plate 30 and screw rod driving part, the side of fluid temperature raising pipeline 3 and fluid temperature reducing pipeline 4 close to push injection cylinder body 5 is fixedly sleeved with annular frame 29, the end of closing round plate 30 close to annular frame 29 is provided with annular protrusion, annular protrusion is slidably arranged in annular frame 29, screw rod driving part is arranged between annular frame 29 and closing round plate 30, screw rod driving part includes drive screw 36, drive screw 36 is rotationally arranged on annular frame 29, screw thread protrusion 37 is arranged on closing round plate 30, screw thread protrusion 37 is threadedly connected with drive screw 36, when needing to keep fluid temperature raising pipeline 3 or fluid temperature reducing pipeline 4 sealed when not entering push injection cylinder body 5, closing round plate 30 is arranged in annular frame 29, the inside of fluid temperature raising pipeline 3 or fluid temperature reducing pipeline 4 is kept closed, when needing to deliver helical flow structure to fluid temperature raising pipeline 3 or fluid temperature reducing pipeline 4, by rotating drive screw 36, because of the sliding relationship of annular protrusion and the inner wall of annular frame 29, closing round plate 30 is driven to move transversely, annular protrusion can also increase the sealing property of fluid temperature raising pipeline 3 or fluid temperature reducing pipeline 4, and then when annular protrusion is removed from annular frame 29, continue to rotate drive screw 36, will drive closing round plate 30 to rotate along the center point of drive screw 36, realize the opening and closing of inlet of fluid temperature raising pipeline 3 or fluid temperature reducing pipeline 4; The fluid heating pipeline 3 and the fluid cooling pipeline 4 are provided with closing valves 6 away from one side of the push injection cylinder 5, wherein the side walls of the fluid heating pipeline 3 and the fluid cooling pipeline 4 are respectively communicated with an entering interface 7 and a discharging interface 8, and the closing valves 6 are arranged to keep the fluid heating pipeline 3 and the fluid cooling pipeline 4 closed during the chemical crystallization treatment in the fluid heating pipeline 3 and the fluid cooling pipeline 4, so as to ensure that the heating fluid and the chemical crystallization flow to the push injection cylinder 5, and the entering interface 7 and the discharging interface 8 are arranged to realize the entering and discharging of the raw melt in the fluid heating pipeline 3 or the fluid cooling pipeline 4.

[0027] The push injection cylinder 5 is further arranged, and the heat exchange box 1 is provided with a position adjusting structure for adjusting the position of the push injection cylinder 5, so that the push injection cylinder 5 corresponds to the fluid heating pipeline 3 or the fluid cooling pipeline 4, the position adjusting structure comprises a bottom sliding groove frame 9, a lateral lifting groove frame 11 and a mounting box 13, the first sliding frame 10 is transversely and slidingly connected to the bottom sliding groove frame 9, the bottom sliding groove frame 9 is arranged on one side of the heat exchange box 1, the transmission screw 38 is rotatably connected to the bottom sliding groove frame 9, the bottom of the first sliding frame 10 is in transmission cooperation with the transmission screw 38, the first driving motor 39 is arranged on one side of the bottom sliding groove frame 9, and the output end of the first driving motor 39 is fixedly connected with the transmission screw 38, so that the first sliding frame 10 is transversely moved on the bottom sliding groove frame 9 through the transmission screw 38; The second sliding frame 12 is longitudinally and slidingly connected to the lateral lifting groove frame 11, the lifting slide plate 40 is fixedly connected in the lateral lifting groove frame 11, the second electric cylinder 41 is arranged in the lateral lifting groove frame 11, the curved sliding frame 42 is slidingly connected between the lateral lifting groove frame 11 and the lifting slide plate 40, the top of the lateral lifting groove frame 11 is provided with an outlet, the second sliding frame 12 is fixedly connected with one side of the curved sliding frame 42, and the second electric cylinder 41 is started to drive the second sliding frame 12 to longitudinally move on the lateral lifting groove frame 11; The mounting box 13 is slidingly arranged between the first sliding frame 10 and the second sliding frame 12, the sliding plate 14 is fixedly connected to the mounting box 13, the push injection cylinder 5 is slidingly connected to the sliding plate 14, the sliding plate 14 is provided with a cylindrical sliding groove, the outer wall of the push injection cylinder 5 is provided with a sliding groove, the mounting box 13 is provided with a horizontal driving assembly for driving the push injection cylinder 5 to horizontally move, the first sliding frame 10 and the second sliding frame 12 are respectively moved, the mounting box 13 is driven to correspond to one of the fluid heating pipeline 3 or the fluid cooling pipeline 4, and then the push injection cylinder 5 and the spiral flow structure are driven by the horizontal driving assembly to enter the fluid heating pipeline 3 or the fluid cooling pipeline 4; The transverse driving assembly comprises a driving box 31 fixedly connected in the mounting box 13, a transverse moving box 32 slidingly connected in the driving box 31, two arc-shaped clamping plates 33 symmetrically arranged in the transverse moving box 32, a driving electric cylinder 34 arranged on each side of the transverse moving box 32, an output end of the driving electric cylinder 34 fixedly connected with the arc-shaped clamping plate 33, a driving lead screw 43 rotatably connected to the top of the driving box 31, the top of the transverse moving box 32 in transmission cooperation with the driving lead screw 43, a second driving motor 44 arranged on the transverse moving box 32, and an output end of the second driving motor 44 fixedly connected with the driving lead screw 43.

[0028] The side of the push injection cylinder 5 close to the heat exchange box 1 is provided with a spiral flow structure, the spiral flow structure enters the fluid temperature raising pipeline 3 or the fluid temperature reducing pipeline 4 through the push injection cylinder 5 to adjust the temperature of the raw material melt, and the spiral flow structure comprises a fixed ring plate 15, an annular cylinder 16 and a spiral conveying pipeline 17, two fixed ring plates 15 are fixedly sleeved on the side of the push injection cylinder 5 close to the heat exchange box 1, the annular cylinder 16 is fixedly connected to one end of each of the two fixed ring plates 15 in correspondence, and a plurality of spiral conveying pipelines 17 are communicated between the two annular cylinders 16, when the push injection cylinder 5 moves to the fluid temperature reducing pipeline 4, the fixed ring plate 15, the annular cylinder 16 and the spiral conveying pipeline 17 are conveyed to a position close to the side where the raw material melt enters the fluid temperature reducing pipeline 4, and the heated fluid flows between the annular cylinder 16 and the spiral conveying pipeline 17 to improve the high-temperature maintaining area of the raw material melt, so that the problem of poor temperature rise of the raw material melt on the other side after rapid cooling of the raw material melt is avoided, and in the use process of the heated fluid, the temperature of the raw material melt is only maintained just after entering the fluid temperature reducing pipeline 4, and in the subsequent heat exchange process, the raw material melt still has good cooling effect, and the temperature of the heated fluid is slightly lower than the highest temperature of the raw material melt, so that the raw material melt is not overheated during the heating process, and the composition of the raw material melt is stable. The middle part of the injection cylinder 5 is fixedly sleeved with two closed ring plates 18, and a conveying cylinder 19 for conveying the liquid suction pipeline is communicated between the bottoms of the two closed ring plates 18. The conveying cylinder 19 is provided with a closed cover 20 on each side. In the process of driving the screw conveying pipeline 17 and other components into the fluid cooling pipeline 4 or the fluid heating pipeline 3 by the injection cylinder 5, the fluid cooling pipeline 4 or the fluid heating pipeline 3 is closed by the closed ring plate 18 to prevent the raw material melt from flowing randomly, and the two closed ring plates 18 will not affect the discharge of the raw material melt through the discharge port 8. When the crystallization treatment in the fluid cooling pipeline 4 or the fluid heating pipeline 3 is performed, the closed cover 20 on each side of the conveying cylinder 19 can be removed, the liquid suction pipeline matched with the inner wall of the conveying cylinder 19 is inserted into the fluid cooling pipeline 4 or the fluid heating pipeline 3, and the heated fluid and the melted melt after crystallization are sucked out together. The input end of the external liquid suction device can be communicated with the liquid suction pipeline. The fluid circulation assembly for realizing fluid circulation operation is arranged in the injection cylinder 5. The fluid circulation assembly comprises a filling sleeve 21 and a discharge cylinder 24. The filling sleeve 21 is arranged in the injection cylinder 5. The filling sleeve 21 is communicated with a liquid inlet pipe 22. The filling sleeve 21 is communicated with a plurality of liquid injection joints 23 between the filling sleeve 21 and one of the annular cylinders 16. The discharge cylinder 24 is arranged in the injection cylinder 5 close to one side of the heat exchange box 1. The discharge cylinder 24 is communicated with a liquid discharge pipe 25. The other annular cylinder 16 is communicated with the discharge cylinder 24 through a communication pipe. When the circulation of the heated fluid is needed, the heated fluid is filled into the annular cylinder 16 close to the mounting box 13 through the liquid inlet pipe 22, so that the heated fluid flows into the plurality of screw conveying pipelines 17 through the annular cylinder 16, and then the heated fluid is conveyed into the other annular cylinder 16, injected into the discharge cylinder 24 through the communication pipe, and discharged from the injection cylinder 5 through the liquid discharge pipe 25. The output end and the input end of the external circulating heating equipment are respectively communicated with the liquid inlet pipe 22 and the liquid discharge pipe 25, so that the heated fluid is circulated and used.

[0029] The spiral flow structure is provided with a fluid spraying assembly in communication. The fluid spraying assembly includes a communication cylinder 26 and a water pipe 27. The discharge cylinder 24 is in communication with the communication cylinder 26. The communication cylinder 26 is fixedly connected to one side of the push cylinder 5. The top of the communication cylinder 26 is in communication with a plurality of water pipes 27. The water pipes 27 are in communication with arc-shaped spray heads 28. When it is necessary to process the chemical crystals in the fluid cooling pipeline 4 or the fluid heating pipeline 3, the communication cylinder 26 and the discharge cylinder 24 are communicated through the spiral cylinder seat 45. The screw cap 46 is threadedly connected to the spiral cylinder seat 45. The threaded push rod 47 is fixedly connected to the screw cap 46. The threaded push rod 47 is threadedly connected to the communication cylinder 26. After the heated fluid needs to enter the communication cylinder 26, the screw cap 46 is rotated by rotating the threaded push rod 47. The screw cap 46 is detached from the spiral cylinder seat 45. The heated fluid in the discharge cylinder 24 can smoothly enter the communication cylinder 26. The heated fluid is sprayed out through the water pipes 27 and the arc-shaped spray heads 28. After the heated fluid contacts the chemical crystals, the chemical crystals can be melted again. Then the heated fluid and the chemical crystals are extracted through the liquid extraction pipeline. Only the water pipes 27 are communicated at the top of the communication cylinder 26, which facilitates stable spraying of the plurality of arc-shaped spray heads 28 located on the upper side. The fluid heating pipeline 3 and the fluid cooling pipeline 4 are fixedly connected to the arc-shaped liquid receiving groove frame 35 at the bottom of the side close to the push cylinder 5. When the push cylinder 5 and the spiral conveying pipeline 17 and other components gradually move out of the fluid cooling pipeline 4 or the fluid heating pipeline 3, a small amount of molten liquid flows into the arc-shaped liquid receiving groove frame 35. The bottom of the arc-shaped liquid receiving groove frame 35 is provided with a discharge valve pipe, which facilitates the discharge of the collected molten liquid.

[0030] The working principle of the plate heat exchanger for ammonium sulfate production is as follows: Two kinds of raw material melts with large temperature difference are respectively injected into the corresponding fluid heating pipeline 3 and the fluid cooling pipeline 4. The two kinds of raw material melts are neutralized in temperature under the action of the heat exchange plate 2. The spiral flow structure is moved into the corresponding fluid cooling pipeline 4 in advance. The fluid circulation assembly drives the heated fluid to flow in the push cylinder 5 and the spiral flow structure, so as to maintain the flow temperature of the raw material melt in the fluid cooling pipeline 4 and ensure that the raw material melt flowing in the fluid heating pipeline 3 is heated to a sufficient temperature. The heated raw material melt can be subsequently introduced into the evaporator for evaporation process. The raw material melt in the fluid cooling pipeline 4 can be crystallized after being cooled. And the spiral flow passage can be moved into the fluid cooling pipeline 4 or the fluid heating pipeline 3, and the fluid carrying the liquid after the crystallization is dissolved is discharged from the fluid cooling pipeline 4 or the fluid heating pipeline 3 by adding high-temperature fluid into the fluid cooling pipeline 4 or the fluid heating pipeline 3.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A plate heat exchanger for ammonium sulfate production, comprising a heat exchange chamber (1), wherein a plurality of heat exchange plates (2) are disposed within the heat exchange chamber (1), and a plurality of fluid heating pipes (3) and a plurality of fluid cooling pipes (4) are respectively disposed between the heat exchange chamber (1) and the plurality of heat exchange plates (2), wherein the fluid heating pipes (3) and the fluid cooling pipes (4) correspond one-to-one, characterized in that, Also includes: The injection cylinder (5) is provided with a position adjustment structure on one side of the heat exchange box (1) for adjusting the position of the injection cylinder (5) so that the injection cylinder (5) corresponds to the fluid heating pipeline (3) or the fluid cooling pipeline (4). The spiral flow structure is provided on the side of the injection cylinder (5) near the heat exchange box (1). The spiral flow structure enters the fluid heating pipeline (3) or the fluid cooling pipeline (4) through the injection cylinder (5) to adjust the temperature of the raw material melt. The injection cylinder (5) is provided with a fluid circulation component to realize fluid circulation operation. A fluid spray assembly is provided on the spiral flow structure, which utilizes fluid to carry chemical crystals out.

2. The plate heat exchanger for ammonium sulfate production according to claim 1, characterized in that, Also includes: The pipeline sealing assembly has an inlet on the side of the fluid heating pipeline (3) and the fluid cooling pipeline (4) near the injection cylinder (5), and the pipeline sealing assembly is provided on the side of the fluid heating pipeline (3) and the fluid cooling pipeline (4) near the injection cylinder (5). The closing valve (6) is provided on the side of the fluid heating pipeline (3) and the fluid cooling pipeline (4) away from the injection cylinder (5). The fluid heating pipeline (3) and the fluid cooling pipeline (4) are respectively connected to an inlet (7) and an outlet (8) on their side walls.

3. The plate heat exchanger for ammonium sulfate production according to claim 2, characterized in that, The position adjustment structure includes: Bottom sliding groove frame (9), on which a first sliding frame (10) is slidably connected laterally; A lateral lifting slot (11) is provided, on which a second sliding frame (12) is longitudinally slidably connected. The mounting box (13) is slidably disposed between the first sliding frame (10) and the second sliding frame (12). A sliding plate (14) is fixedly connected to the mounting box (13). The injection cylinder (5) is slidably connected to the sliding plate (14). A transverse drive assembly for driving the injection cylinder (5) to move laterally is provided inside the mounting box (13).

4. The plate heat exchanger for ammonium sulfate production according to claim 3, characterized in that, The spiral flow structure includes: Fixed ring plate (15), two fixed ring plates (15) are fixedly sleeved on the side of the injection cylinder (5) near the heat exchange box (1); The annular cylinder (16) is fixedly connected to one end of each of the two fixed ring plates (15). A spiral conveying pipeline (17) is connected between the two annular cylinders (16).

5. A plate heat exchanger for ammonium sulfate production according to claim 4, characterized in that, Two closed ring plates (18) are fixedly sleeved in the middle of the injection cylinder (5), and a delivery cylinder (19) for conveying the liquid extraction pipeline is connected between the bottoms of the two closed ring plates (18). Both sides of the delivery cylinder (19) are provided with closed covers (20).

6. A plate heat exchanger for ammonium sulfate production according to claim 5, characterized in that, The fluid circulation assembly includes: A filling sleeve (21) is provided inside the injection cylinder (5). An inlet pipe (22) is connected to the filling sleeve (21). Multiple injection connectors (23) are connected between the filling sleeve (21) and one of the annular cylinders (16). The discharge cylinder (24) is located inside the injection cylinder (5) on the side close to the heat exchange box (1). The discharge cylinder (24) is connected to a drain pipe (25). Another annular cylinder (16) is connected to the discharge cylinder (24) through a connecting pipe.

7. A plate heat exchanger for ammonium sulfate production according to claim 6, characterized in that, The fluid spray assembly includes: A connecting cylinder (26) is connected to the discharge cylinder (24), and the connecting cylinder (26) is fixedly connected to one side of the injection cylinder (5); Water pipe (27), the top of the connecting cylinder (26) is connected to multiple water pipes (27), and an arc-shaped spray head (28) is connected to the water pipe (27).

8. A plate heat exchanger for ammonium sulfate production according to claim 7, characterized in that, The pipeline sealing assembly includes: The annular frame (29) is fixedly fitted on the side of the fluid heating pipeline (3) and the fluid cooling pipeline (4) near the injection cylinder (5). A closed circular plate (30) is provided with an annular protrusion at one end of the closed circular plate (30) near the annular frame (29), and the annular protrusion is slidably disposed within the annular frame (29); The screw drive is provided between the annular frame (29) and the closed circular plate (30).

9. A plate heat exchanger for ammonium sulfate production according to claim 8, characterized in that, The lateral drive component includes: A drive housing (31) is fixedly connected inside the mounting housing (13), and a transverse housing (32) is slidably connected inside the drive housing (31). Arc-shaped clamping plate (33), two arc-shaped clamping plates (33) are symmetrically arranged inside the transverse moving box (32), and electric driving cylinders (34) are provided on both sides of the transverse moving box (32). The output end of the electric driving cylinder (34) is fixedly connected to the arc-shaped clamping plate (33).

10. A plate heat exchanger for ammonium sulfate production according to claim 9, characterized in that, Both the fluid heating pipeline (3) and the fluid cooling pipeline (4) have an arc-shaped liquid receiving tray (35) fixedly connected to the bottom of the side of the injection cylinder (5) near the injection cylinder.

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