Heat exchanger for chemical production

Abstract

The utility model discloses a heat exchanger for chemical industry production, which comprises a shell, a plurality of heat exchange tubes are arranged on the inner side of the shell, a first seal head and a second seal head are respectively arranged at two ends of the shell, a shunting component is adjustably arranged on the inner side of the second seal head, and the shunting component comprises a liquid collecting shell and a plurality of shunting heads. The multiple flow dividing heads are arranged at the end of the liquid collecting shell in a communicating mode and right face the multiple heat exchange pipes one to one, and a liquid inlet pipe of the liquid collecting shell penetrates through the second sealing head and can be connected with a high-pressure cleaning pump; according to the utility model, the shunting assembly is arranged and can be connected with the high-pressure cleaning pump, so that the cleaning liquid is input into the shunting assembly; due to the fact that the flow dividing assembly is adjustably arranged and is provided with the multiple flow dividing heads right facing the heat exchange pipes one by one, high-pressure liquid is input into the heat exchange pipes at the same time, the heat exchange pipes are cleaned at the same time, the current situation that workers need to clean the heat exchange pipes one by one is changed, the cleaning efficiency of the heat exchange pipes is improved, and complete disassembly of end sockets is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger cleaning, in particular to a heat exchanger for chemical production. Background Art

[0002] In industrial production, in order to maintain a stable temperature of a certain fluid substance, or to cool down or heat up the fluid substance, the fluid substance and another fluid substance at a different temperature are generally allowed to enter and exit the heat exchanger at the same time. Through the action of the heat exchanger, the temperatures of the two different fluid substances tend to be similar, thereby facilitating industrial production.

[0003] At present, there are many types of heat exchangers for materials of different temperatures, such as plate heat exchangers, tube heat exchangers, etc. Because the tube heat exchanger has a simple structure, is strong and reliable, and has wide adaptability, it occupies an important position in chemical, petroleum, power, food and many other industrial production. The tube heat exchanger includes a shell, a tube sheet, a heat exchange tube, a head, a baffle, etc. For example, a shell-and-tube heat exchanger disclosed in a Chinese patent with patent number CN103486883A includes a shell, a head, a tube sheet and a tube. A long-diameter transverse partition is horizontally arranged in the cavity between the head on one side of the shell and the corresponding tube sheet, which divides the cavity into two independent transverse cavities, an upper and a lower. A longitudinal partition is longitudinally arranged in the cavity between the head on the other side of the shell and the corresponding tube sheet, which divides the cavity into two independent longitudinal cavities, and a short-diameter transverse partition is horizontally arranged in one of the longitudinal cavities to separate the longitudinal cavity into an independent upper partial cavity and a lower partial cavity, and the upper partial cavity and the lower partial cavity are respectively equipped with a tube pass inlet and a tube pass outlet. The shell-and-tube heat exchanger provided by the present invention can have a longer tube-side distance when the shell-side distance is shorter, thereby increasing the heat exchange time and enhancing the heat exchange effect.

[0004] When using a tubular heat exchanger to transfer heat between two substances, the cooperation of the heat exchange tube and the shell forms two paths, the shell side and the tube side. One substance enters from the shell side inlet of the tubular heat exchanger, and the other substance enters from the tube side inlet. Both substances are in contact with the heat exchange tube, thus achieving heat transfer. When the heat exchange tube transports unclean substances, impurities are very likely to be left in the heat exchange tube, or scale is formed on the inside of the heat exchange tube. Therefore, the heat exchange tube needs to be cleaned regularly to avoid blockage that affects the flow of substances.

[0005] However, the heat exchange tubes are completely sealed in the space formed by the shell and the head. If you want to clean the heat exchange tubes, you need to remove the heads at both ends of the shell to expose both ends of the heat exchange tubes, and use a high-pressure cleaning pump to transport cleaning liquid to the heat exchange tubes. Under the action of the high-pressure liquid, the heat exchange tubes can be cleaned. It may even be necessary to dismantle multiple heat exchange tubes for cleaning. This cleaning method requires dismantling the heads and cleaning multiple heat exchange tubes one by one. The operation is cumbersome and takes a long time. Utility Model Content

[0006] The utility model aims to provide a heat exchanger for chemical production, aiming to improve the problem that cleaning of a tubular heat exchanger requires dismantling all the heads and cleaning the heat exchange tubes one by one, which takes a long time to clean.

[0007] The utility model is implemented as follows: a heat exchanger for chemical production, including a shell, a plurality of heat exchange tubes are arranged on the inner side of the shell, and a first head and a second head are respectively arranged at both ends of the shell, and a diversion component is adjustably arranged on the inner side of the second head, the diversion component includes a liquid collecting shell and a plurality of diversion heads, the plurality of diversion heads are arranged at the end of the liquid collecting shell, and are opposite to the plurality of heat exchange tubes one by one, the liquid inlet pipe of the liquid collecting shell passes through the second head and can be connected to a high-pressure cleaning pump.

[0008] Preferably, the outer diameter of the liquid collecting shell is smaller than the inner diameter of the second end cover, and a sealing layer is provided on the outer side surface, and the sealing layer is in contact with the inner side surface of the second end cover.

[0009] Preferably, a disc group is provided at the opening of the liquid collecting shell, and a first internally threaded tube is provided on the side wall of the liquid collecting shell, bolts are penetrated through the disc group, ends of the bolts are threadedly inserted into the first internally threaded tube, and a sealing layer is provided on the contact surface between the disc group and the liquid collecting shell.

[0010] Preferably, the disk group includes a first disk and a second disk, and countersunk holes are arranged on the side walls of the first disk and the second disk that are close to each other. The diverter head is arranged as a conical tube structure, and an annular plate is arranged on the outside. The diverter head passes through the countersunk holes of the first disk and the second disk, and the annular plate is located in the countersunk holes.

[0011] Preferably, slide columns are provided on both the first disk body and the second disk body, a slide groove is provided on the inner side wall of the second head, and a through hole is provided at the end, the slide column is located in the slide groove, and the liquid inlet pipe is provided through the through hole.

[0012] Preferably, an adjusting screw is provided on the outside of the second head, the adjusting screw is located on the side of the through hole, a flange is provided at the end of the liquid inlet pipe, a second internally threaded tube is provided on the side of the flange, and the adjusting screw thread penetrates the second internally threaded tube.

[0013] Preferably, one end of the first head away from the shell is arranged as an opening, and a sealing disk is arranged at the opening, and the sealing disk is arranged in close contact with the first head.

[0014] Preferably, a bracket is arranged on the first head, and a limiting rod and a rotating stud are arranged on the side of the sealing disk. The rotating stud thread penetrates the bracket, and the limiting rod penetrates the bracket.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model is provided with a diverter assembly, which can be connected to a high-pressure cleaning pump so that the cleaning liquid can be input into the diverter assembly; because the diverter assembly can be adjusted and is provided with multiple diverter heads that are directly opposite to the heat exchange tubes, high-pressure liquid can be simultaneously input into multiple heat exchange tubes, thereby realizing simultaneous cleaning of multiple heat exchange tubes, changing the current situation in which staff are required to clean the heat exchange tubes one by one, improving the cleaning efficiency of the heat exchange tubes, and avoiding complete disassembly of the head. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0017] Figure 2 It is a schematic structural diagram of a plane of an embodiment of the utility model;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the utility model diversion component;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the liquid collecting shell of the utility model;

[0020] Figure 5 It is a three-dimensional structural schematic diagram of the utility model's splitter head, the first disc body and the second disc body;

[0021] Figure 6 It is a three-dimensional structural schematic diagram of the first disk body and the second disk body of the utility model;

[0022] Figure 7 It is a three-dimensional structural schematic diagram of the utility model splitter head;

[0023] Figure 8 It is a three-dimensional structural schematic diagram of the second head of the utility model;

[0024] Fig. 9 It is a three-dimensional structural schematic diagram of the first head of the utility model.

[0025] In the figure: 1, shell; 11, baffle; 12, heat exchange tube; 2, first head; 21, bracket; 22, sealing plate; 23, limiting rod; 24, rotating stud; 3, second head; 31, slide groove; 32, adjusting screw; 33, through hole; 4, diverter assembly; 41, liquid collecting shell; 411, liquid inlet pipe; 412, first internal threaded pipe; 42, diverter head; 421, annular plate; 43, first disk body; 431, countersunk hole; 432, slide column; 44, second disk body. DETAILED DESCRIPTION

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0028] Example 1

[0029] It has been pointed out in the background technology that in industrial (such as chemical) production, the heat exchanger realizes the heat transfer of two substances with different temperatures. During the heat transfer process, impurities are retained in the heat exchange tubes, or scale is formed in the heat exchange tubes. It is necessary to disassemble the head or even the heat exchange tubes and clean the heat exchange tubes one by one. This operation is relatively cumbersome and takes a long time. In order to solve the above problems, this embodiment is modified on the basis of the existing heat exchanger to avoid completely disassembling the head and change the current situation of cleaning multiple heat exchange tubes one by one.

[0030] like Figure 1 , Figure 2 As shown, the existing heat exchanger generally includes a shell 1, a first end cap 2 and a second end cap 3. Tube sheets are sealed at both ends of the inner side of the shell 1, and baffles 11 are alternately arranged up and down between the two tube sheets. The baffles 11 are arranged in a semicircular structure. A plurality of heat exchange tubes 12 are arranged through the two tube sheets. In addition, a shell-side inlet and outlet are arranged on the shell 1. The first end cap 2 and the second end cap 3 are respectively arranged at both ends of the shell 1, and completely cover the heat exchange tubes 12. The first end cap 2 and the second end cap 3 are respectively arranged with tube-side inlets and outlets.

[0031] like Figure 2 , Figure 3As shown, in order to avoid the need to disassemble the first head 2 and the second head 3 when cleaning the heat exchange tube 12, a diverter assembly 4 is adjustable on the inner side of the second head 3. The diverter assembly 4 includes a liquid collecting shell 41 and a plurality of diverter heads 42. The plurality of diverter heads 42 are arranged at the end of the liquid collecting shell 41 and face the plurality of heat exchange tubes 12 one by one. The liquid inlet pipe 411 of the liquid collecting shell 41 runs through the second head 3 and can be connected to a high-pressure cleaning pump. The high-pressure cleaning pump is a prior art and has many types. Therefore, it can be purchased on the market when used. When the heat exchange tube 12 needs to be cleaned, the heat exchanger is stopped, and the diverter assembly 4 is pushed to move so that the diverter heads 42 are inserted into the heat exchange tube 12 one by one. Then the liquid inlet pipe 411 is connected to the high-pressure cleaning pump through a pipeline. The high-pressure cleaning pump controls the high pressure of the cleaning liquid to enter and exit the heat exchange tube 12, thereby forcing the impurities in the heat exchange tube 12 to move and discharge. In this way, all heat exchange tubes 12 can be cleaned at one time, which reduces the cleaning time accordingly. At the same time, only the first head 2 needs to be disassembled, because the impurities discharged from the heat exchange tubes 12 are separated and output from the first head 2.

[0032] like Figure 4 , Figure 8 As shown, in order to realize the adjustable setting of the diverter assembly 4, a through hole 33 is provided at the end of the second end cap 3, and an adjusting screw 32 is provided on the outside of the second end cap 3, the adjusting screw 32 is located on the side of the through hole 33, a flange is provided at the end of the liquid inlet pipe 411, the liquid inlet pipe 411 is arranged through the through hole 33, a second internally threaded pipe is provided on the side of the flange, and the adjusting screw 32 is threadedly arranged through the second internally threaded pipe. During cleaning, by rotating the adjusting screw 32, the flange can be controlled to drive the liquid inlet pipe 411 and the liquid collecting shell 41 to move, so that the end of the diverter head 42 extends into the heat exchange tube. When cleaning is completed, the adjusting screw 32 is flipped to force the diverter assembly 4 to reset, and is located on the side of the pipe inlet and outlet away from the shell 1 to avoid affecting the flow of substances. When the high-pressure cleaning pump is disconnected from the liquid inlet pipe 411, a blocking disk 413 is installed at the end of the liquid inlet pipe 411 to block the liquid inlet pipe 411. In addition, a one-way valve can be set at the diverter head 42 to prevent substances from flowing out through the diverter component 4.

[0033] In order to prevent substances from flowing out through the contact surface between the liquid collecting shell 41 and the second head 3, the outer diameter of the liquid collecting shell 41 is smaller than the inner diameter of the second head 3, and a sealing layer is provided on the outer side surface, which contacts the inner side surface of the second head 3. Under the action of the sealing layer, the liquid collecting shell 41 and the second head 3 can be brought into sealed sliding contact.

[0034] like Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, in order to stably install the diverter head 42 on the liquid collecting shell 41, a disk group is provided at the opening of the liquid collecting shell 41, and a first internally threaded tube 412 is provided on the side wall of the liquid collecting shell 41, bolts are penetrated through the disk group, and the ends of the bolts are threadedly inserted into the first internally threaded tube 412, and a sealing layer is provided on the contact surface between the disk group and the liquid collecting shell 41, and the diverter head 42 is detachably penetrated through the disk group. Under the action of the disk group, the diverter head 42 is stably installed on the liquid collecting shell 41 and is communicated with the inner space of the liquid collecting shell 41.

[0035] like Figure 6 , Figure 7 As shown, in order to realize the detachability of the diverter head 42, the disc assembly includes a first disc 43 and a second disc 44. Countersunk holes 431 are arranged on the side walls of the first disc 43 and the second disc 44 close to each other, that is, the ends of the countersunk holes 431 with larger diameters are arranged adjacent to each other and can be spliced ​​to form an annular cavity. The diverter head 42 is arranged as a conical tube structure, and an annular plate 421 is arranged on the outside. The diverter head 42 passes through the countersunk holes 431 of the first disc 43 and the second disc 44, and the annular plate 421 is located in the annular cavity of the countersunk holes 431. When the diverter head 42 needs to be replaced or repaired, the staff rotates the bolts, disassembles the disc assembly, and releases the restrictions of the first disc 43 and the second disc 44 at the same time, so as to realize the disassembly and assembly of the diverter head 42. The diverter head 42 is arranged as a conical tube structure, that is, the end with a smaller diameter is arranged adjacent to the shell 1, which provides convenience for the diverter assembly 4 to move and insert into the heat exchange tube 12. In addition, a sealing layer may be provided on the outer side of the diverter head 42 so that the cleaning water can be completely injected into the heat exchange tube 12 .

[0036] like Figure 7 , Figure 8 As shown, in order to limit the position of the liquid collecting shell 41 relative to the second head 3, a slide column 432 is provided on the first disk body 43 and the second disk body 44, a slide groove 31 is provided on the inner side wall of the second head 3, and a through hole 33 is provided at the end, the slide column 432 is located in the slide groove 31, and the liquid inlet pipe 411 is provided through the through hole 33.

[0037] Example 2

[0038] like Fig. 9 As shown, on the basis of Example 1, in order to facilitate the output of impurities and waste liquid after cleaning, the end of the first head 2 away from the shell 1 can be set as an opening, and a bracket 21 is set on the outside of the opening, and a sealing disk 22 is set at the opening. The sealing disk 22 is set in contact with the first head 2, and a limiting rod 23 and a rotating stud 24 are set on the side of the sealing disk 22. The rotating stud 24 is threaded through the bracket 21, and the limiting rod 23 is set through the bracket 21. Before cleaning the heat exchange tube 12, the staff controls the rotating stud 24 to rotate, and then controls the sealing disk 22 to move, so that the first head 2 is unobstructed, which facilitates the output of waste liquid and impurities.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat exchanger for chemical production, comprising a shell (1), a plurality of heat exchange tubes (12) being arranged inside the shell (1), and a first end cap (2) and a second end cap (3) being arranged at both ends of the shell (1), characterized in that: A flow diversion assembly (4) is adjustably arranged on the inner side of the second end cap (3), the flow diversion assembly (4) comprising a liquid collecting shell (41) and a plurality of flow diversion heads (42), the plurality of flow diversion heads (42) being arranged in communication at the end of the liquid collecting shell (41) and facing the plurality of heat exchange tubes (12) one by one, and the liquid inlet pipe (411) of the liquid collecting shell (41) passing through the second end cap (3) and being connectable to a high-pressure cleaning pump.

2. A heat exchanger for chemical production according to claim 1, characterized in that: The outer diameter of the liquid collecting shell (41) is smaller than the inner diameter of the second end cap (3), and a sealing layer is provided on the outer side surface, the sealing layer being in contact with the inner side surface of the second end cap (3).

3. A heat exchanger for chemical production according to claim 2, characterized in that: A disc assembly is provided at the opening of the liquid collecting shell (41), and a first internally threaded tube (412) is provided on the side wall of the liquid collecting shell (41). Bolts are provided through the disc assembly, and the ends of the bolts are threadedly inserted into the first internally threaded tube (412). A sealing layer is provided on the contact surface between the disc assembly and the liquid collecting shell (41).

4. A heat exchanger for chemical production according to claim 3, characterized in that: The disc assembly comprises a first disc (43) and a second disc (44); countersunk holes (431) are arranged on the side walls of the first disc (43) and the second disc (44) that are close to each other; the flow splitter (42) is arranged as a conical tube structure, and an annular plate (421) is arranged on the outside; the flow splitter (42) passes through the countersunk holes (431) of the first disc (43) and the second disc (44), and the annular plate (421) is located in the countersunk holes (431).

5. A heat exchanger for chemical production according to claim 4, characterized in that: A slide column (432) is provided on both the first disk body (43) and the second disk body (44); a slide groove (31) is provided on the inner side wall of the second end cover (3), and a through hole (33) is provided at the end; the slide column (432) is located in the slide groove (31), and the liquid inlet pipe (411) is provided through the through hole (33).

6. A heat exchanger for chemical production according to claim 5, characterized in that: An adjusting screw (32) is arranged on the outside of the second sealing head (3), and the adjusting screw (32) is located on the side of the through hole (33). A flange is arranged at the end of the liquid inlet pipe (411), and a second internally threaded tube is arranged on the side of the flange. The adjusting screw (32) is threadedly arranged to penetrate the second internally threaded tube.

7. A heat exchanger for chemical production according to claim 1, characterized in that: One end of the first sealing head (2) away from the shell (1) is arranged as an opening, and a sealing disk (22) is arranged at the opening, and the sealing disk (22) is arranged in close contact with the first sealing head (2).

8. A heat exchanger for chemical production according to claim 7, characterized in that: A bracket (21) is arranged on the first sealing head (2), and a limiting rod (23) and a rotating stud (24) are arranged on the side of the sealing disk (22); the rotating stud (24) is threadedly penetrated through the bracket (21), and the limiting rod (23) is disposed through the bracket (21).

Images