Hydrochloric acid graphite heat exchanger capable of increasing heat exchange area

Abstract

The utility model discloses a hydrochloric acid graphite heat exchanger capable of increasing the heat exchange area. The hydrochloric acid graphite heat exchanger comprises a box body, an upper sleeve plate, a lower sleeve plate and a transfer bin, wherein the upper sleeve plate and the lower sleeve plate are arranged on the upper side and the lower side of the box body in a central symmetry mode; partition plates which are arranged in a staggered manner are fixedly connected in the box body, graphite heat exchange tubes are embedded in the partition plates at equal intervals, and a temperature sensor and a controller are embedded in the inner side of the right rear end of the box body; a sealing limiting structure is arranged between the upper sleeve plate and the box body and comprises a connecting frame, a second sealing ring, a movable rod, a spring and a limiting block. According to the hydrochloric acid graphite heat exchanger capable of increasing the heat exchange area, the contact between the graphite heat exchange pipes and cooling water is conveniently improved, the heat exchange area of hydrochloric acid is increased, the graphite heat exchange pipes are conveniently taken out for cleaning and replacing, the cooling water is conveniently introduced in a circulating mode, the cooling water is conveniently filtered, purified and replaced, and the heat exchange efficiency of the hydrochloric acid graphite heat exchanger is high.

Description

Technical Field

[0001] This utility model relates to the field of graphite heat exchanger technology, specifically to a hydrochloric acid graphite heat exchanger with increased heat exchange area. Background Technology

[0002] Hydrochloric acid is an aqueous solution of hydrogen chloride, which is highly corrosive and irritating. In its production process, graphite heat exchangers are required. Graphite heat exchangers are efficient and corrosion-resistant heat exchange equipment, and are particularly suitable for heat exchange of corrosive media such as hydrochloric acid.

[0003] For example, Chinese utility model patent CN216049341U discloses a novel block-hole graphite heat exchanger, which includes a cylinder, an upper head, a lower head, and a graphite heat exchange block. The graphite heat exchange block has an annular cross-section and several process medium flow holes are provided in its height direction. These process medium flow holes are arranged in a ring array within the radial annular region of the graphite heat exchange block. The sidewall of the graphite heat exchange block has several heat exchange medium flow holes facing the center of the graphite heat exchange block, and each heat exchange medium flow hole is not connected to the process medium flow hole. An arc-shaped baffle is provided between two adjacent graphite heat exchange blocks for the reversal of the heat exchange medium in the shell side. The inner hole between two adjacent graphite heat exchange blocks is sealed and separated by a gasket. This utility model, by designing the graphite heat exchange block with an annular structure and ensuring that all heat exchange medium flow holes are connected to the inner hole of the graphite heat exchange block, effectively reduces the number of process medium flow holes and increases the flow area of ​​the heat exchange medium flow holes, thereby increasing the heat transfer area, compared to the traditional structure.

[0004] However, existing hydrochloric acid graphite heat exchangers still have some shortcomings during use. For example, it is generally not convenient to increase the contact between the graphite heat exchange tubes and the cooling water, it is difficult to increase the heat exchange area of ​​hydrochloric acid, it is not convenient to remove the graphite heat exchange tubes for cleaning and replacement, it is not convenient to circulate cooling water, filter, purify and replace the cooling water, and the heat exchange efficiency is limited. Therefore, we propose a hydrochloric acid graphite heat exchanger with increased heat exchange area to solve the problems mentioned above. Utility Model Content

[0005] The purpose of this utility model is to provide a hydrochloric acid graphite heat exchanger with increased heat exchange area, so as to solve the problems mentioned in the background art. The existing hydrochloric acid graphite heat exchangers still have some shortcomings in use, such as the inconvenience of increasing the contact between the graphite heat exchange tube and the cooling water, the difficulty in increasing the heat exchange area of ​​hydrochloric acid, the inconvenience of removing the graphite heat exchange tube for cleaning and replacement, the inconvenience of circulating cooling water for filtration, purification and replacement, and the limited heat exchange efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hydrochloric acid graphite heat exchanger with increased heat exchange area, comprising: a housing, an upper sleeve plate and a lower sleeve plate symmetrically arranged on the upper and lower sides of the housing, and a transfer chamber fixedly connected to the right side of the housing and the lower sleeve plate;

[0007] Also includes:

[0008] The box is fixedly connected with staggered partitions, and graphite heat exchange tubes are nested in the partitions at equal intervals. A temperature sensor and controller are embedded in the inner side of the right rear end of the box. A first solenoid valve and a second solenoid valve are fixedly installed in the inner side of the lower right end and the inner side of the rear end of the box, respectively.

[0009] A sealing and limiting structure is provided between the upper sleeve plate and the box body. The sealing and limiting structure includes a connecting frame, a second sealing ring, a movable rod, a spring, and a limiting block. The connecting frame is fixedly connected to the lower side of the outer end of the upper sleeve plate.

[0010] The box and the transfer chamber are equipped with a suction and return structure, which includes a pump and a return pipe. The transfer chamber is equipped with a detachable filter and purification structure, which includes a filter screen, a purification plate, a counterweight plate and a third sealing ring. The pump is located on the front side of the transfer chamber.

[0011] Preferably, a first sealing ring that is tightly fitted to the graphite heat exchange tube is glued and fixed inside both the box body and the partition, and a through hole is opened inside the outer end of the partition.

[0012] Preferably, the upper sleeve plate is attached to the upper surface of the box body, and the lower sleeve plate is fixedly connected to the bottom of the box body. The upper and lower sleeve plates are respectively connected to the upper and lower ends of the first sealing ring. Moreover, a limiting rod that is attached to the first sealing ring is fixedly connected inside the upper and lower sleeve plates.

[0013] Preferably, the connecting frame is nested and fitted to the upper outer side of the box body, and a second sealing ring that fits into the upper sleeve plate is pasted and fixed to the upper inner side of the connecting frame, and movable rods are engaged and connected to the inner sides of both the left and right ends of the connecting frame.

[0014] Preferably, a spring is nested on the outer side of the inner end of the movable rod, located within the connecting frame, and the two ends of the spring are respectively tightly fitted to the connecting frame and the limiting block, and the limiting block fixedly connected to the inner end of the movable rod is fitted to the box body buckle.

[0015] Preferably, the outer end of the pump is threadedly connected to a return pipe, and the outer ends of the return pipe are threadedly connected to the inner side of the upper right end of the housing and the inner side of the lower right end of the transfer chamber, respectively. The filter screen and the purification plate are nested and attached to the transfer chamber, and a counterweight plate is attached to the filter screen and the purification plate.

[0016] Preferably, the counterweight plate is located inside the box and the transfer compartment, and a third sealing ring that fits tightly against the box and the transfer compartment is pasted and fixed to the outside of the counterweight plate.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the hydrochloric acid graphite heat exchanger with increased heat exchange area facilitates the improvement of the contact between the graphite heat exchange tube and the cooling water, increases the heat exchange area of ​​hydrochloric acid, facilitates the removal of the graphite heat exchange tube for cleaning and replacement, facilitates the circulation of cooling water, and facilitates the filtration, purification and replacement of cooling water, resulting in high heat exchange efficiency.

[0018] 1. The enclosure is equipped with a housing, partitions, graphite heat exchange tubes, and a first sealing ring. The housing is equipped with partitions with through holes that are fixed in an alternating manner. Graphite heat exchange tubes are nested inside the housing and partitions at equal intervals. The graphite heat exchange tubes are tightly fitted with a first sealing ring that is attached and fixed to the housing and partitions. The upper and lower ends of the graphite heat exchange tubes are connected to an upper sleeve plate and a lower sleeve plate, respectively. The graphite heat exchange tubes flow through the upper and lower sleeve plates in a curved manner, which facilitates the contact between the graphite heat exchange tubes and the cooling water and increases the heat exchange area of ​​hydrochloric acid.

[0019] 2. The enclosure consists of a housing, an upper sleeve plate, a connecting frame, and movable rods. The upper sleeve plate is fitted to the upper surface of the housing. The lower outer side of the upper sleeve plate is fixedly connected to a connecting frame that nests and fits snugly against the housing. The inner sides of the left and right ends of the connecting frame are symmetrically equipped with engaging movable rods. The inner end of the movable rod is fixedly connected to a limiting block that snaps into the housing. The outer side of the inner end of the movable rod is fitted with a spring that fits tightly against the housing and the limiting block. This facilitates the removal of the graphite heat exchange tubes for cleaning and replacement.

[0020] 3. The enclosure is equipped with a housing, a limiting block, a first solenoid valve, and a pump. The first solenoid valve is fixedly installed on the inner side of the lower right end of the housing. A transfer chamber, which is fixed to the housing and the lower sleeve plate, is located outside the first solenoid valve. The transfer chamber is connected to the outer side of the upper end of the housing via the pump and a return pipe. A filter screen and a purification plate are nested and fitted inside the transfer chamber. A counterweight plate is attached to the filter screen and the purification plate. A third sealing ring, which fits tightly against the housing and the transfer chamber, is attached and fixed to the outside of the counterweight plate. A temperature sensor, a controller, and a second solenoid valve are embedded and installed on the inner side of the rear end of the housing. Therefore, it is convenient to circulate cooling water and to filter, purify, and replace the cooling water, resulting in high heat exchange efficiency. Attached Figure Description

[0021] Figure 1 This is a frontal three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a frontal cross-sectional view of the present invention.

[0023] Figure 3 This is a top view sectional structural diagram of the present invention;

[0024] Figure 4 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0025] Figure 5 This is a top-view three-dimensional structural diagram of the connection between the lower sleeve plate and the limiting rod of this utility model;

[0026] Figure 6 This is a top view schematic diagram of the connection between the filter screen and the transfer chamber of this utility model.

[0027] In the diagram: 1. Box body; 2. Partition plate; 3. Graphite heat exchange tube; 4. First sealing ring; 5. Through hole; 6. Upper sleeve plate; 7. Lower sleeve plate; 8. Limiting rod; 9. Connecting frame; 10. Second sealing ring; 11. Movable rod; 12. Spring; 13. Limiting block; 14. First solenoid valve; 15. Transfer chamber; 16. Pump; 17. Return pipe; 18. Filter screen; 19. Purification plate; 20. Counterweight plate; 21. Third sealing ring; 22. Temperature sensor; 23. Controller; 24. Second solenoid valve. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1-6This utility model provides a technical solution: a hydrochloric acid graphite heat exchanger with increased heat exchange area, including a housing 1, partitions 2, graphite heat exchange tubes 3, a first sealing ring 4, a through hole 5, an upper sleeve plate 6, a lower sleeve plate 7, a limiting rod 8, a connecting frame 9, a second sealing ring 10, a movable rod 11, a spring 12, a limiting block 13, a first solenoid valve 14, a transfer chamber 15, a pump 16, a return pipe 17, a filter screen 18, a purification plate 19, a counterweight plate 20, a third sealing ring 21, a temperature sensor 22, a controller 23, and a second solenoid valve 24. The upper sleeve plate 6 and lower sleeve plate 7 are symmetrically arranged on the upper and lower sides of the housing 1, and the transfer chamber 15 is fixedly connected to the right side of the housing 1 and the lower sleeve plate 7. The housing 1 is fixedly connected with staggered partitions 2, and graphite heat exchange tubes 3 are nested at equal intervals within the partitions 2. A temperature sensor 22 and a controller 23 are embedded in the inner side of the right rear end of the housing 1. A first solenoid valve 14 and a second solenoid valve 24 are fixedly installed on the inner side of the lower right end and the inner side of the rear end of the housing 1, respectively. A sealing and limiting structure is provided between the upper sleeve plate 6 and the housing 1. The sealing and limiting structure includes a connecting frame 9, a second sealing ring 10, a movable rod 11, a spring 12, and a limiting block 13. The connecting frame 9 is fixedly connected to the lower side of the outer end of the upper sleeve plate 6. A suction and return structure is provided outside the housing 1 and the transfer chamber 15. The suction and return structure includes a pump 16 and a return pipe 17. A detachable filter and purification structure is provided inside the transfer chamber 15. The detachable filter and purification structure includes a filter screen 18, a purification plate 19, a counterweight plate 20, and a third sealing ring 21. The pump 16 is located on the front side of the transfer chamber 15. Specific Implementation Example 1

[0031] To address the problems in existing technologies where it is difficult to increase the contact area between the graphite heat exchange tube 3 and the cooling water, and difficult to increase the heat exchange area of ​​hydrochloric acid, this embodiment employs the following technical solution: Figure 1 , Figure 2 , Figure 3 and Figure 5During the use of this graphite heat exchanger, hydrochloric acid drain pipes can be connected to the upper sleeve plate 6 and the lower sleeve plate 7 respectively. Partition plates 2 with through holes 5 are staggered and fixed inside the housing 1. Graphite heat exchange tubes 3 are nested at equal intervals inside the housing 1 and partition plates 2. First sealing rings 4, which are tightly fitted to the graphite heat exchange tubes 3, are glued and fixed inside both the housing 1 and partition plates 2. The upper outer side of the graphite heat exchange tubes 3 is connected to the upper sleeve plate 6, which is fitted to the housing 1 and sealed by a second sealing ring 10. The lower outer side of the graphite heat exchange tube 3 is connected to the lower sleeve plate 7 which is fixedly connected to the housing 1. The upper and lower sides of the graphite heat exchange tube 3 are fitted with limiting rods 8 which are fixed to the upper sleeve plate 6 and the lower sleeve plate 7. Therefore, the arrangement of the housing 1, the first sealing ring 4, the upper sleeve plate 6 and the lower sleeve plate 7 makes the hydrochloric acid flow in a curved shape in the graphite heat exchange tube 3. Furthermore, the partition plate 2 with the internal through hole 5 facilitates the blocking of the flow of cooling water, thereby improving the contact between the graphite heat exchange tube 3 and the cooling water and increasing the heat exchange area of ​​the hydrochloric acid. Specific Implementation Example 2

[0033] To address the problem in existing technologies where it is inconvenient to remove the graphite heat exchange tube 3 for cleaning and replacement, this embodiment employs the following technical solution: Figure 1 , Figure 2 and Figure 4 After long-term use of the graphite heat exchanger, the movable rods 11, which are engaged with the inner sides of the left and right ends of the connecting frame 9, can be pulled outwards. This causes the movable rods 11 to move outwards under the pressure of the springs 12 nested around them. This causes the movable rods 11 to move outwards along with the limiting block 13 fixed at its inner end, thus breaking the snap-fit ​​between the limiting block 13 and the housing 1. This continues until the limiting block 13 is retracted into the connecting frame 9. Then, based on pulling the movable rods 11 outwards, the connecting frame 9 can be moved upwards, causing the upper sleeve plate 6 fixedly connected inside the connecting frame 9 to move upwards until the nested connection between the connecting frame 9 and the housing 1 is broken. This allows the upper sleeve plate 6 to stop obstructing the upper surface of the housing 1, making it easier to remove the graphite heat exchange tubes 3 nested at equal intervals inside the housing 1 for cleaning and replacement. Specific Implementation Example 3

[0035] To address the problems in existing technologies, such as the inconvenience of circulating cooling water, filtering, purifying, and replacing the cooling water, and the limited heat exchange efficiency, this embodiment employs the following technical solution: Figure 1 , Figure 2 , Figure 3 and Figure 6During the hydrochloric acid introduction process, the controller 23 embedded in the inner side of the right rear end of the tank 1 can control the operation of the first solenoid valve 14 fixedly installed on the inner side of the lower right end of the tank 1, so that the lower end of the tank 1 is connected to the transfer chamber 15 set to the right of the first solenoid valve 14. Then, the controller 23 can control the pump 16 installed on the front side of the transfer chamber 15 to operate. Since the pump 16 is connected to the return pipe 17 by external thread, and the outer end of the return pipe 17 is threaded to the inner side of the upper right end of the tank 1 and the inner side of the lower right end of the transfer chamber 15 respectively, the operation of the pump 16 facilitates the suction and return of cooling water, so that it circulates in the tank 1 and exchanges heat with the graphite heat exchange tube 3.

[0036] Furthermore, a filter screen 18 and a purification plate 19 are nested and connected within the transfer chamber 15. A counterweight plate 20 is attached to the filter screen 18 and the purification plate 19, and a third sealing ring 21 is attached to the outside of the counterweight plate 20, which is tightly fitted to the housing 1 and the transfer chamber 15. Therefore, under the cover of the counterweight plate 20 and the third sealing ring 21, the cooling water can be filtered and purified by the filter screen 18 and the purification plate 19. The controller 23 can control the operation of the temperature sensor 22 embedded in the front of the housing 1 to sense the temperature of the cooling water in the housing 1. When the temperature reaches a high level, the controller 23 can control the first solenoid valve 14 to disconnect the flow between the housing 1 and the transfer chamber 15. Then, the controller can control the operation of the second solenoid valve 24 embedded in the inner rear of the housing 1 to discharge the high-temperature cooling water and introduce low-temperature cooling water. This facilitates the circulation of cooling water and the filtration, purification and replacement of the cooling water, resulting in high heat exchange efficiency. All the electrical components mentioned above are existing technologies and will not be described in detail here.

[0037] The contents not described in detail in this specification are existing technologies known to those skilled in the art. All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hydrochloric acid graphite heat exchanger with increased heat exchange area, comprising: The box (1), the upper and lower center symmetrical upper cover plate (6) and lower cover plate (7) arranged on the box (1) and the transfer warehouse (15) fixedly connected with the right side of the box (1) and the lower cover plate (7); It is characterized in that further comprising: The box (1) is fixedly connected with the staggered partition plate (2), and the graphite heat exchange pipe (3) is nested in the partition plate (2) at equal intervals, and the temperature sensor (22) and the controller (23) are embedded and installed on the right rear end of the box (1), and the first electromagnetic valve (14) and the second electromagnetic valve (24) are respectively fixedly installed on the right lower end and the rear end of the box (1); The sealing limiting structure is arranged between the upper cover plate (6) and the box (1), wherein the sealing limiting structure comprises a connecting frame (9), a second sealing ring (10), a movable rod (11), a spring (12) and a limiting block (13), and the connecting frame (9) is fixedly connected to the outer end of the lower side of the upper cover plate (6); The box (1) and the transfer warehouse (15) are provided with a suction backflow structure, wherein the suction backflow structure comprises a suction pump (16) and a backflow pipe (17), and the transfer warehouse (15) is provided with a detachable filtering and purifying structure, wherein the detachable filtering and purifying structure comprises a filter screen (18), a purification plate (19), a counterweight plate (20) and a third sealing ring (21), and the suction pump (16) is located on the front side of the transfer warehouse (15).

2. The hydrochloric acid graphite heat exchanger with increased heat exchange area according to claim 1, characterized in that: The box (1) and the partition plate (2) are both pasted with the first sealing ring (4) which is closely combined with the graphite heat exchange pipe (3), and the through hole (5) is formed in the outer end of the partition plate (2).

3. The hydrochloric acid graphite heat exchanger with increased heat exchange area according to claim 1, characterized in that: The upper cover plate (6) is combined with the upper surface of the box (1), and the lower cover plate (7) is fixedly connected to the lower side of the box (1), and the upper cover plate (6) and the lower cover plate (7) are respectively connected with the upper and lower ends of the first sealing ring (4), and the upper cover plate (6) and the lower cover plate (7) are both fixedly connected with the limiting rod (8) which is combined with the first sealing ring (4).

4. The hydrochloric acid graphite heat exchanger with increased heat exchange area according to claim 1, characterized in that: The connecting frame (9) is nested and combined with the upper end of the outer side of the box (1), and the second sealing ring (10) is pasted and fixed on the inner side of the upper end of the connecting frame (9) which is combined with the upper cover plate (6), and the movable rod (11) is connected with the inner side of the left and right ends of the connecting frame (9).

5. The hydrochloric acid graphite heat exchanger with increased heat exchange area according to claim 1, characterized in that: The spring (12) is nested and arranged on the inner end of the outer side of the movable rod (11) which is located in the connecting frame (9), and the two ends of the spring (12) are closely combined with the connecting frame (9) and the limiting block (13) respectively, and the limiting block (13) fixedly connected with the inner end of the movable rod (11) is buckled and combined with the box (1).

6. The hydrochloric acid graphite heat exchanger with increased heat exchange area according to claim 1, characterized in that: The outer end of the suction pump (16) is threadedly connected with the backflow pipe (17), and the outer end of the single backflow pipe (17) is respectively threadedly connected with the inner side of the right upper end of the box (1) and the inner side of the right lower end of the transfer warehouse (15), and the filter screen (18) and the purification plate (19) are both nested and combined in the transfer warehouse (15), and the counterweight plate (20) is combined on the filter screen (18) and the purification plate (19).

7. The hydrochloric acid graphite heat exchanger with increased heat exchange area according to claim 1, characterized in that: The counterweight plate (20) is located in the box (1) and the transfer bin (15), and the counterweight plate (20) is externally attached and fixed with the third sealing ring (21) which is closely attached to the box (1) and the transfer bin (15).

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