Refrigerant shunting and leading-out device for melt crystallization pipe

Abstract

The utility model relates to a refrigerant shunting and leading-out device of a melt crystallization pipe. The problem that in the prior art, cold and hot media at the bottom of a crystal tube are difficult to lead out completely and rapidly is solved. The device comprises an annular liquid receiving disc arranged at the bottom of a crystallization pipe in a crystallizer shell, a plurality of receding channels allowing the crystallization pipe to penetrate through are formed in the annular liquid receiving disc, an upper flow guide structure tightly attached to the circumferential outer wall of the crystallization pipe is inserted into the upper side of each receding channel, and a lower flow guide structure is inserted into the lower side of each receding channel. An overflow liquid receiving mechanism is arranged on the lower side of the annular liquid receiving disc. The device has the advantages that cold and hot media which flow to the bottom of the crystallization pipe after being coated with a film can be quickly guided out to the outside, the cold and hot media are prevented from being accumulated in the circumferential direction of the bottom of the crystallization pipe, the overflow phenomenon of the cold and hot media can be avoided, the use effect is good, and the cold and heat exchange efficiency of the crystallization pipe is improved.

Description

Technical Field

[0001] This utility model relates to the field of melt crystallization technology, specifically to a refrigerant diversion and outlet device for a melt crystallization tube. Background Technology

[0002] In existing falling film crystallization equipment, a distributor is typically used to distribute the material or heating / cooling medium onto the inner and outer walls of the crystallization tube. The flow rate of the material or heating / cooling medium is controlled so that it flows downwards in a film-like manner along the tube wall under gravity. However, in continuous chemical production processes, existing falling film melt crystallizers suffer from uneven film formation due to crystallization, and poor heat transfer during film formation. Furthermore, during crystallization, it is difficult to completely and quickly remove the heating / cooling medium from the bottom of the crystallization tube, affecting the heat exchange effect.

[0003] To address the shortcomings of existing technologies, people have conducted long-term explorations and proposed various solutions. For example, Chinese patent literature discloses a novel double falling film melting crystallizer and a process for material separation [CN201611052225.7]. It includes an upper shell with a hot and cold medium inlet at one end and a lower shell with a hot and cold medium outlet at one end. An outer tube connects the upper and lower shells, and an inner tube is fitted inside the outer tube. The space between the outer and inner tubes is filled with hot and cold medium. An outer tube pull rod is installed inside the outer tube, and its two ends are respectively connected to the upper and lower shells. An outer tube falling film head is also fitted on the outer tube, and an outer tube falling film hole is opened on the outer tube. An inner tube pull rod is installed inside the inner tube, and its two ends are respectively connected to the upper and lower shells. An inner tube falling film head is installed on the inner tube, and an inner tube falling film hole is opened on the inner tube.

[0004] The above solution has solved the problems of uneven film formation and poor heat transfer in existing falling film melt crystallizers to a certain extent. However, the solution still has many shortcomings. For example, during the crystallization process, it is difficult to completely and quickly remove the hot and cold medium at the bottom of the crystallization tube, which affects the heat exchange effect. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a refrigerant diversion and discharge device for a molten crystallizer tube.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a refrigerant diversion and discharge device for a molten crystallizer tube, comprising an annular liquid receiving tray at the bottom of the crystallizer tube disposed within the crystallizer shell, the annular liquid receiving tray having a plurality of clearance channels through which the crystallizer tube can pass, an upper guide structure tightly fitted to the outer circumferential wall of the crystallizer tube inserted into the upper side of the clearance channels, a lower guide structure inserted into the lower side of the clearance channels, and an overflow liquid receiving mechanism disposed on the lower side of the annular liquid receiving tray.

[0007] In the above-mentioned refrigerant diversion and outlet device for a molten crystallizer tube, a liquid receiving plate is provided on the inner side of the circumference, which is connected to the upper guide structure. A first drain hole is provided on one side of the liquid receiving and draining cavity, and a first drain pipe is provided on the outer side of the crystallizer shell, which is connected to the first drain hole.

[0008] In the above-mentioned refrigerant diversion and outlet device for a molten crystallizer tube, the annular liquid receiving tray is inclinedly arranged inside the crystallizer shell towards the first drain pipe, one end of the overflow liquid receiving mechanism is provided with a second drain hole, and a second drain pipe communicating with the second drain hole is provided on the outer circumference of the crystallizer shell.

[0009] In the above-mentioned refrigerant diversion and outlet device for a molten crystallizer tube, the upper guide structure includes an upper guide sleeve, a sealing sleeve that is tightly fitted to the outer wall of the crystallizer tube on the inner circumferential side of the upper guide sleeve, and an elastic pressing part arranged in an annular shape at the upper end of the sealing sleeve, and an annular guide channel is provided between the sealing sleeve and the upper guide sleeve.

[0010] In the above-mentioned refrigerant diversion and outlet device for a molten crystallizer tube, the bottom of the annular guide channel is connected to the liquid receiving and drainage chamber, and the upper end of the annular guide channel is open, with the height of the upper end face of the sealing sleeve being lower than the height of the upper drainage sleeve.

[0011] In the above-mentioned refrigerant diversion and outlet device for a molten crystallizer tube, an overflow receiving plate is provided on the upper end face of the annular receiving plate and on the outer side of the circumference. An overflow receiving plate is formed between the inner side of the overflow receiving plate and the outer side of the upper drain sleeve. The receiving groove is provided with an overflow drainage channel provided on the annular receiving plate and a receiving drainage chamber that are interconnected.

[0012] In the above-mentioned refrigerant diversion and outlet device for a molten crystallizer tube, the lower guide structure includes a lower guide sleeve, the upper guide sleeve and the lower guide sleeve are interconnected, and the lower end of the lower guide sleeve is provided with a number of positioning guide parts that are tightly fitted to the outer wall of the crystallizer tube, and a guide gap is formed between two adjacent positioning guide parts.

[0013] In the aforementioned refrigerant diversion and outlet device for a molten crystallizer tube, an annular sealing ring is provided on the inner circumferential side of the lower drain sleeve and below the annular receiving plate.

[0014] In the above-mentioned refrigerant diversion and discharge device for a molten crystallizer tube, the overflow receiving mechanism includes a diversion receiving tray, an annular receiving groove on the upper surface of the diversion receiving tray, a plurality of positioning holes for the crystallizer tube to pass through in the annular receiving groove, and a water-proof sealing ring on the upper surface of the positioning hole and located on the outer circumferential wall of the crystallizer tube.

[0015] In the above-mentioned refrigerant diversion and outlet device for a molten crystallizer tube, the annular liquid receiving tank and the second drain hole are interconnected, and the end face of the annular liquid receiving tank is inclined toward the second drain hole.

[0016] Compared with the prior art, the advantages of this utility model are: it can quickly discharge the hot and cold medium flowing to the bottom of the crystallizer tube after coating to the outside, avoid the accumulation of hot and cold medium in the circumference of the bottom of the crystallizer tube, and prevent the hot and cold medium from overflowing, thus avoiding spillage. It can completely collect the hot and cold medium and guide it to the crystallizer shell, resulting in good performance and improved heat exchange efficiency of the crystallizer tube. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the installation position of this utility model;

[0018] Figure 2 This is a schematic diagram of the annular liquid receiving tray structure in this utility model;

[0019] Figure 3 This is a schematic diagram showing the installation positions of the upper and lower flow guiding structures on the annular liquid receiving tray in this utility model.

[0020] Figure 4 This is an overall schematic diagram of the upper and lower flow guiding structures in this utility model;

[0021] Figure 5 This is a schematic diagram of the lower drainage sleeve structure in this utility model;

[0022] Figure 6 This is a schematic diagram of the diversion and receiving tray structure in this utility model;

[0023] In the figure: crystallizer shell 1, crystallization tube 11, annular liquid receiving tray 2, clearance channel 21, liquid receiving and drainage chamber 22, first drainage hole 23, first drainage pipe 24, upper guide structure 3, upper guide sleeve 31, sealing sleeve 32, elastic pressing part 33, annular guide channel 34, overflow liquid receiving tray body 35, liquid receiving groove 36, overflow drainage channel 37, lower guide structure 4, lower guide sleeve 41, positioning guide part 42, guide gap 43, annular sealing ring 44, overflow liquid receiving mechanism 5, second drainage hole 51, second drainage pipe 52, diversion liquid receiving tray 53, annular liquid receiving groove 54, positioning hole 55, waterproof sealing ring 56. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] like Figure 1-6As shown, a refrigerant diversion and outlet device for a molten crystallizer tube includes an annular liquid receiving tray 2 at the bottom of a crystallizer tube 11 located inside the crystallizer housing 1. The annular liquid receiving tray 2 is provided with several clearance channels 21 through which the crystallizer tube 11 can pass. An upper guide structure 3 is inserted into the upper side of the clearance channel 21 and is tightly fitted to the outer circumferential wall of the crystallizer tube 11. A lower guide structure 4 is inserted into the lower side of the clearance channel 21. An overflow liquid receiving mechanism 5 is provided on the lower side of the annular liquid receiving tray 2.

[0026] The annular liquid receiving plate 2 has a liquid receiving and drainage cavity 22 that is connected to the upper guide structure 3 on the inner side. A first drainage hole 23 is provided on one side of the liquid receiving and drainage cavity 22, and a first drainage pipe 24 that is connected to the first drainage hole 23 is provided on the outer side of the crystallizer shell 1.

[0027] As can be seen, the annular liquid receiving plate 2 is inclined inside the crystallizer shell 1 towards the first drain pipe 24, and the overflow liquid receiving mechanism 5 is provided with a second drain hole 51 at one end. The crystallizer shell 1 is provided with a second drain pipe 52 that communicates with the second drain hole 51 on the outer side.

[0028] The inclined annular receiving tray 2 allows the hot and cold media falling into the receiving and draining chamber 22 to quickly collect and increase the discharge speed.

[0029] Obviously, the upper guide structure 3 includes an upper guide sleeve 31, and the upper guide sleeve 31 is provided with a sealing sleeve 32 that is tightly attached to the outer wall of the crystallization tube 11 on the inner side of the circumference. The upper end of the sealing sleeve 32 is provided with an elastic pressing part 33 arranged in an annular shape, and an annular guide channel 34 is provided between the sealing sleeve 32 and the upper guide sleeve 31.

[0030] The elastic clamping part 33 is used to reduce the seepage of refrigerant or heat medium into the inner wall of the sealing sleeve 32. The annular flow guiding channel 34 is reserved with an overflow groove, that is, the height of the upper end face of the sealing sleeve 32 is lower than the height of the upper flow guiding sleeve 31, thereby reducing the overflow of refrigerant or heat medium to the outside of the flow guiding sleeve 31 during flow guiding.

[0031] Furthermore, the bottom of the annular guide channel 34 is connected to the liquid receiving and drainage chamber 22, and the upper end of the annular guide channel 34 is open, with the height of the upper end face of the sealing sleeve 32 being lower than the height of the upper drainage sleeve 31.

[0032] Furthermore, an overflow receiving plate body 35 is provided on the upper end face of the annular receiving plate 2 and located on the outer side of the circumference. An overflow receiving plate body 35 forms a receiving groove 36 between the inner side of the overflow receiving plate body 35 and the outer side of the upper drainage sleeve 31. The receiving groove 36 is provided with an overflow drainage channel 37 provided on the annular receiving plate 2 and is connected to the receiving drainage cavity 22.

[0033] The overflow receiving plate 35 is used to receive the hot and cold medium fluid that overflows to the outside of the drainage sleeve 31, and guides it to the receiving drainage cavity 22 through the overflow drainage channel 37, thereby forming an internal and external diversion and discharge.

[0034] Specifically, the lower guide structure 4 includes a lower guide sleeve 41, and the upper guide sleeve 31 and the lower guide sleeve 41 are interconnected. The lower end of the lower guide sleeve 41 is provided with a number of positioning guide parts 42 that are tightly fitted to the outer wall of the crystallization tube 11, and a guide gap 43 is formed between two adjacent positioning guide parts 42.

[0035] The positioning guide part 42 is used to clamp the crystallizing tube 11, and the guide gap 43 is used to prevent the hot and cold medium from being blocked and to increase the downward flow speed.

[0036] More specifically, the lower drainage sleeve 41 is provided with an annular sealing ring 44 on the circumferentially inward side and below the annular liquid receiving plate 2.

[0037] In detail, the overflow receiving mechanism 5 includes a diversion receiving plate 53, an annular receiving groove 54 is provided on the upper end face of the diversion receiving plate 53, and a plurality of positioning holes 55 are provided in the annular receiving groove 54 for the crystallization tube 11 to pass through. A water-proof sealing ring 56 is provided on the upper end face of the positioning hole 55 and on the outer wall around the crystallization tube 11.

[0038] Waterproof sealing ring 56 is used to prevent the infiltration of hot or cold media.

[0039] Preferably, the annular liquid receiving groove 54 and the second drain hole 51 are interconnected, and the end face of the annular liquid receiving groove 54 is inclined toward the second drain hole 51.

[0040] In summary, the principle of this embodiment is as follows: the refrigerant or heat medium flows down along the outer wall of the crystallizer tube 11 and flows into the liquid receiving and draining chamber 22 from the annular guide channel 34 and the overflow drain channel 37, and is discharged through the first drain hole 23; the refrigerant or heat medium remaining on the wall of the crystallizer tube 11 flows down along the inner wall of the sealing sleeve 32 into the lower guide sleeve 41 and falls into the diversion liquid receiving plate 53, and is discharged to the outside through the second drain hole 51 on the diversion liquid receiving plate 53.

[0041] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0042] Although this document frequently uses terms such as crystallizer shell 1, crystallizing tube 11, annular liquid receiving tray 2, clearance channel 21, liquid receiving and drainage chamber 22, first drainage hole 23, first drainage pipe 24, upper guide structure 3, upper guide sleeve 31, sealing sleeve 32, elastic clamping part 33, annular guide channel 34, overflow liquid receiving tray body 35, liquid receiving groove 36, overflow drainage channel 37, lower guide structure 4, lower guide sleeve 41, positioning guide part 42, guide gap 43, annular sealing ring 44, overflow liquid receiving mechanism 5, second drainage hole 51, second drainage pipe 52, diversion liquid receiving tray 53, annular liquid receiving groove 54, positioning hole 55, and water-proof sealing ring 56, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A refrigerant diversion and outlet device for a molten crystallizer tube, comprising an annular receiving tray (2) disposed at the bottom of a crystallizer tube (11) within a crystallizer housing (1), wherein the annular receiving tray (2) is provided with a plurality of clearance channels (21) through which the crystallizer tube (11) can pass, characterized in that, The upper side of the clearance channel (21) is fitted with an upper guide structure (3) that is closely attached to the outer circumferential wall of the crystallization tube (11). The lower side of the clearance channel (21) is fitted with a lower guide structure (4). The lower side of the annular liquid receiving plate (2) is provided with an overflow liquid receiving mechanism (5).

2. The refrigerant diversion and discharge device for a molten crystallizer tube according to claim 1, characterized in that, The annular liquid receiving plate (2) is provided with a liquid receiving and drainage cavity (22) communicating with the upper guide structure (3) on the inner side of the circumference. A first drainage hole (23) is provided on one side of the liquid receiving and drainage cavity (22), and a first drainage pipe (24) communicating with the first drainage hole (23) is provided on the outer side of the crystallizer shell (1).

3. The refrigerant diversion and discharge device for a molten crystallizer tube according to claim 2, characterized in that, The annular liquid receiving plate (2) is inclined inside the crystallizer shell (1) towards the first drain pipe (24). The overflow liquid receiving mechanism (5) has a second drain hole (51) at one end. The crystallizer shell (1) has a second drain pipe (52) connected to the second drain hole (51) on the outer circumference.

4. The refrigerant diversion and discharge device for a molten crystallizer tube according to claim 2, characterized in that, The upper guide structure (3) includes an upper guide sleeve (31), and the upper guide sleeve (31) is provided with a sealing sleeve (32) that is tightly attached to the outer wall of the crystallization tube (11) on the inner side of the circumference. The upper end of the sealing sleeve (32) is provided with an elastic pressing part (33) arranged in an annular shape. An annular guide channel (34) is provided between the sealing sleeve (32) and the upper guide sleeve (31).

5. The refrigerant diversion and discharge device for a molten crystallizer tube according to claim 4, characterized in that, The bottom of the annular flow channel (34) is connected to the liquid receiving and drainage chamber (22), and the upper end of the annular flow channel (34) is open. The height of the upper end face of the sealing sleeve (32) is lower than the height of the upper drainage sleeve (31).

6. The refrigerant diversion and discharge device for a molten crystallizer tube according to claim 5, characterized in that, An overflow receiving plate body (35) is provided on the upper end face of the annular receiving plate (2) and located on the outer side of the circumference. An overflow receiving plate body (35) and the outer side of the upper drainage sleeve (31) form a receiving groove (36). The receiving groove (36) is provided with an overflow drainage channel (37) provided on the annular receiving plate (2) that communicates with the receiving drainage cavity (22).

7. The refrigerant diversion and discharge device for a molten crystallizer tube according to claim 5, characterized in that, The lower guide structure (4) includes a lower guide sleeve (41), the upper guide sleeve (31) and the lower guide sleeve (41) are interconnected, the lower guide sleeve (41) has a plurality of positioning guide parts (42) that are tightly fitted to the outer wall of the crystallization tube (11) on the inner side of the lower circumference, and a guide gap (43) is formed between two adjacent positioning guide parts (42).

8. The refrigerant diversion and discharge device for a molten crystallizer tube according to claim 7, characterized in that, The lower drainage sleeve (41) is provided with an annular sealing ring (44) on the inner circumferential side and below the annular liquid receiving plate (2).

9. The refrigerant diversion and discharge device for a molten crystallizer tube according to claim 1, characterized in that, The overflow receiving mechanism (5) includes a diversion receiving plate (53), the upper end face of the diversion receiving plate (53) is provided with an annular receiving groove (54), the annular receiving groove (54) is provided with a plurality of positioning holes (55) through which the crystallizing tube (11) can pass, and the upper end face of the positioning hole (55) and located on the outer circumferential wall of the crystallizing tube (11) is provided with a water-proof sealing ring (56).

10. A refrigerant diversion and discharge device for a molten crystallizer tube according to claim 9, characterized in that, The annular liquid receiving groove (54) and the second drain hole (51) are interconnected, and the end face of the annular liquid receiving groove (54) is inclined toward the second drain hole (51).

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