Heat exchanger for dichloropropene production

Abstract

The present disclosure relates to the technical field of dichloropropylene production, and an embodiment of the present disclosure provides a heat exchanger for dichloropropylene production, which comprises a heat exchange box, a through pipe is inserted into the heat exchange box, a plug-in heat exchange assembly is arranged in the heat exchange box, and a positioning and mounting assembly is arranged on the outside of the heat exchange box; the plug-in heat exchange assembly comprises a liquid inlet pipe, the liquid inlet pipe is arranged on the heat exchange box, one end of the liquid inlet pipe is inserted into the heat exchange box, a heat exchange coil is connected to the end of the liquid inlet pipe, the heat exchange coil is wound on the through pipe, a liquid outlet pipe is arranged at the end of the heat exchange coil, and the end of the liquid outlet pipe extends out of the bottom surface of the heat exchange box. Through the above technical solution, the technical problem that the conventional preheating mode in the prior art relies on electric heating equipment and has huge energy consumption, and the cooling after the reaction is usually achieved by the water cooling mode, although part of the heat can be recovered, but if there is no perfect waste heat utilization channel, the energy recovery target cannot be achieved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of dichloropropylene production technology, and more specifically, to a heat exchanger for dichloropropylene production. Background Technology

[0002] Traditional preheating methods often rely on electric heating equipment, which consumes a lot of energy. Cooling after the reaction is often done by water cooling. Although some heat can be recovered, if there is no proper waste heat utilization channel, not only will the energy recovery target not be achieved, but additional resources will also be needed to treat the discharged hot water, which is neither environmentally friendly nor economical. At the same time, the media involved in the production of dichloropropylene often contain impurities. If these impurities are not effectively filtered, they will accumulate in the pipes and equipment, affecting the operating efficiency of the equipment and even causing damage to the equipment. For example, in heat exchangers, impurities accumulate on the surface of the heat exchange tubes, which will reduce the heat exchange efficiency and hinder the flow of the medium.

[0003] Furthermore, in actual production scenarios, the installation environment of heat exchangers is complex and diverse. Conventional heat exchanger installation methods lack flexibility and are difficult to adapt to different spatial layouts and installation requirements. Moreover, during equipment operation, factors such as vibration may cause components to loosen, reducing equipment stability and thus affecting the continuity and safety of production. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a heat exchanger for dichloropropylene production, which solves the technical problem that the traditional preheating methods in the prior art mostly rely on electric heating equipment, which consumes a lot of energy, and the cooling after the reaction often uses water cooling. Although some heat can be recovered, if there is no perfect waste heat utilization channel, it will not only fail to achieve the energy recovery target.

[0005] According to one aspect, at least one embodiment of this disclosure provides a heat exchanger for dichloropropylene production, comprising:

[0006] A heat exchange box, the interior of which is connected to a through-pipe;

[0007] A plug-in heat exchange assembly is disposed inside the heat exchange box;

[0008] A positioning and mounting assembly is disposed on the outside of the heat exchange box;

[0009] The plug-in heat exchange assembly includes an inlet pipe, which is disposed on the heat exchange box. One end of the inlet pipe is inserted into the heat exchange box, and the other end of the inlet pipe is connected to a heat exchange coil. The heat exchange coil is wound around the through pipe, and the other end of the heat exchange coil is provided with an outlet pipe, the end of which extends out of the bottom surface of the heat exchange box.

[0010] As a further technical solution, a filter screen is provided inside the passage pipe. The number of filter screens is several, and the filter screens are arranged in a straight line inside the passage pipe. The diameter of the filter mesh of the filter screens decreases successively.

[0011] As a further technical solution, the positioning and mounting assembly includes a connecting frame, which is disposed on the outer side wall of the heat exchange box. The side wall of the connecting frame is provided with a positioning hole, and a positioning shaft is disposed inside the positioning hole. A swing sleeve is fitted on the positioning shaft, and an mounting plate is disposed on the outer side wall of the swing sleeve.

[0012] As a further technical solution, the mounting plate is fixedly connected to the swing sleeve, and the mounting plate has screw mounting holes.

[0013] As a further technical solution, a feed pipe is provided on the upper end face of the heat exchange box, and a discharge pipe is provided on the lower end face of the heat exchange box, with the feed pipe and the discharge pipe corresponding to each other.

[0014] As a further technical solution, both ends of the through pipe are provided with insertion slots, and both ends of the through pipe extend out of the heat exchange box.

[0015] As a further technical solution, a gathering cover is provided inside the tube, and a gathering cover is provided on one side of each filter screen.

[0016] As a further technical solution, the heat exchange box and the through pipe are sealed and assembled together.

[0017] The beneficial effects of the embodiments disclosed herein are as follows:

[0018] In this disclosure, a spirally wound heat exchange coil is used, which increases the contact area with the pipe, causing the fluid to flow in a spiral shape, generating strong centrifugal force and secondary flow, improving turbulence intensity, and resulting in a higher heat transfer coefficient. This allows for a reduction in equipment volume while maintaining the same heat transfer capacity, and also ensures efficient operation under low temperature difference conditions. Multiple sets of filter screens with progressively smaller mesh diameters are installed inside the pipe, enabling step-by-step filtration of the production medium. This effectively intercepts large particles and fine impurities, ensuring the purity of the output medium, preventing impurities from accumulating in the pipes and equipment, and helping to maintain the normal operating efficiency of the equipment and extend its service life. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0020] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;

[0021] Figure 2 This is a cross-sectional view of the heat exchanger box disclosed herein;

[0022] Figure 3 This is a cross-sectional view of the pipe disclosed herein;

[0023] In the diagram: 1. Heat exchange box; 2. Through pipe; 3. Insert heat exchange assembly; 3-1. Liquid inlet pipe; 3-2. Heat exchange coil; 3-3. Liquid outlet pipe; 3-4. Filter screen; 4. Positioning and mounting assembly; 4-1. Connecting bracket; 4-2. Positioning hole; 4-3. Positioning shaft; 4-4. Swing sleeve; 4-5. Mounting plate; 4-6. Screw mounting sliding hole; 5. Feed pipe; 6. Discharge pipe; 7. Gathering cover; 8. Insert groove. Detailed Implementation

[0024] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0025] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0026] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0027] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0029] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] like Figures 1-3 As shown, a heat exchanger for dichloropropylene production according to this disclosure is included, comprising:

[0031] Heat exchange box 1, with a through pipe 2 inserted inside the heat exchange box 1;

[0032] The heat exchange component 3 is inserted and installed inside the heat exchange box 1;

[0033] Positioning and mounting component 4 is located on the outside of heat exchange box 1;

[0034] The plug-in heat exchange assembly 3 includes an inlet pipe 3-1, which is installed on the heat exchange box 1. One end of the inlet pipe 3-1 is inserted into the heat exchange box 1, and the end of the inlet pipe 3-1 is connected to a heat exchange coil 3-2. The heat exchange coil 3-2 is wound around the through pipe 2, and the end of the heat exchange coil 3-2 is provided with an outlet pipe 3-3. The end of the outlet pipe 3-3 extends out of the bottom surface of the heat exchange box 1.

[0035] The positioning and mounting assembly 4 includes a connecting frame 4-1, which is located on the outer side wall of the heat exchange box 1. The side wall of the connecting frame 4-1 is provided with a positioning hole 4-2. A positioning shaft 4-3 is provided inside the positioning hole 4-2. A swing sleeve 4-4 is fitted on the positioning shaft 4-3. An mounting plate 4-5 is provided on the outer side wall of the swing sleeve 4-4.

[0036] In some examples, the heat exchanger adopts a split assembly design. The core components include a heat exchange box 1, a through pipe 2, a plug-in heat exchange assembly 3, and a positioning and mounting assembly 4. During assembly, the through pipe 2 is first horizontally inserted into the heat exchange box 1. The connection between the through pipe 2 and the heat exchange box 1 is treated with a sealing structure to ensure that the medium inside the heat exchange box 1 will not leak. Both ends of the through pipe 2 extend outside the heat exchange box 1, and the extended part retains sufficient connection slack to connect with the pipeline of the dichloropropylene production system.

[0037] The heat exchange assembly 3 is installed after the through pipe 2 is fixed. The liquid inlet pipe 3-1 is installed on the upper side wall of the heat exchange box 1 through a fixed connector. The end of the liquid inlet pipe 3-1 is connected to the heat exchange coil 3-2 with an adapter. The joint is sealed to prevent medium leakage. The heat exchange coil 3-2 is made of corrosion-resistant and heat-conducting material and is fixed to the outer surface of the through pipe 2 by spiral winding. A heat-conducting enhancement structure can be added between the coil and the through pipe 2 to improve the heat transfer effect. During the winding process, the spacing between the coils is kept uniform to avoid overlapping or excessive gaps. The end of the heat exchange coil 3-2 is connected to the liquid outlet pipe 3-3 through a turning connector. The liquid outlet pipe 3-3 extends along the inner wall of the heat exchange box 1 and then passes through the bottom surface of the heat exchange box 1. The protruding part can be used to install flow control components.

[0038] like Figures 1-3 As shown, this embodiment proposes that a filter screen 3-4 be provided inside the tube 2, and the number of filter screens 3-4 is several. The filter screens 3-4 are arranged in a straight line inside the tube 2, and the diameter of the filter screen holes of the filter screens 3-4 decreases successively.

[0039] In some examples, several filter screens 3-4 are sequentially installed inside the pipe 2 along the direction of media flow. The filter screens 3-4 are fixed by a detachable snap-fit ​​method. The corresponding fixing structure is preset on the inner wall of the pipe 2 to facilitate the installation and replacement of the filter screens 3-4. The number of filter screens 3-4 is determined according to the filtration requirements. From the media inlet end to the outlet end, the diameter of the filter mesh holes gradually decreases to achieve a graded filtration effect.

[0040] For example, such as Figure 1 As shown, the mounting plate 4-5 is fixedly connected to the swing sleeve 4-4, and the mounting plate 4-5 has a screw mounting hole 4-6.

[0041] In some examples, the positioning and mounting components 4 are symmetrically arranged on both outer walls of the heat exchange box 1. The connecting frame 4-1 is fixedly connected to the outer wall of the heat exchange box 1. The connection part must be firm and reliable. The positioning shaft 4-3 is installed in the positioning hole 4-2 on the side wall of the connecting frame 4-1. An appropriate gap is maintained between the positioning shaft 4-3 and the positioning hole 4-2 so that the positioning shaft 4-3 can rotate flexibly. The swing sleeve 4-4 is fitted on the positioning shaft 4-3. After fitting, a limiting structure is set to prevent the swing sleeve 4-4 from falling off. The mounting plate 4-5 is fixedly connected to the swing sleeve 4-4. The mounting plate 4-5 is provided with a screw mounting sliding hole 4-6. The size of the sliding hole must meet the installation position adjustment requirements to adapt to the position deviation of different installation scenarios.

[0042] For example, such as Figure 2 As shown, a feed pipe 5 is provided on the upper end face of the heat exchange box 1, and a discharge pipe 6 is provided on the lower end face of the heat exchange box 1. The positions of the feed pipe 5 and the discharge pipe 6 are corresponding.

[0043] In some examples, a feed pipe 5 is provided on the upper end face of the heat exchange box 1, and a discharge pipe 6 is provided at the corresponding position on the lower end face. The specifications of the feed pipe 5 and the discharge pipe 6 are matched to ensure smooth flow of the medium. Standard connecting parts are provided at the ends of both the feed pipe 5 and the discharge pipe 6 to facilitate connection with external pipelines. The outer wall of the heat exchange box 1 can be insulated according to actual needs, and appropriate insulation materials are selected for wrapping and protection. The sealing parts between the pipe 2 and the heat exchange box 1 need to be checked regularly to ensure good sealing performance. If aging of the seals is found, they should be replaced in time.

[0044] For example, such as Figure 1 As shown, insertion slots 8 are opened at both ends of the pipe 2, and both ends of the pipe 2 extend out of the heat exchange box 1.

[0045] In some examples, the plug groove 8 plays a crucial role in the connection and adaptation of the heat exchanger for dichloropropylene production. Through the plug groove 8 opened at both ends of the pipe 2, it can be precisely connected with the plug end of the external production pipeline, realizing rapid assembly between the pipelines. This structure can ensure the sealing and stability of the connection between the pipe 2 and the external pipeline, and avoid leakage of the medium during transmission. At the same time, the plug groove 8 provides adaptation space for the connection between the pipe 2 and external pipelines of different specifications, enhancing the versatility and installation flexibility of the heat exchanger in different production scenarios.

[0046] For example, such as Figure 3 As shown, a gathering cover 7 is provided inside the tube 2, and a gathering cover 7 is provided on one side of each filter screen 3-4.

[0047] In some examples, a convergence hood 7 is provided on the flow-facing side of each filter screen 3-4. The convergence hood 7 and the filter screen 3-4 are integrally connected to each other, guiding the medium to concentrate through the filtration area and improving filtration efficiency.

[0048] For example, such as Figure 1 As shown, the heat exchange box 1 and the through pipe 2 are sealed and connected by an insertion assembly.

[0049] In use, the heat exchanger for dichloropropylene production achieves heat exchange and purification of the medium through the coordinated operation of multiple components. Its core working principle revolves around four major aspects: medium transmission, heat exchange, graded filtration, and flexible installation.

[0050] The dichloropropylene production medium to be processed enters from one end of the through pipe 2, flows axially along the inside of the through pipe 2, and finally exits from the other end. At the same time, the heat exchange medium enters the heat exchange box 1 through the liquid inlet pipe 3-1, completes heat exchange through the heat exchange coil 3-2, and is discharged through the liquid outlet pipe 3-3. The heat exchange box 1 is a closed cavity, and the internal auxiliary medium can be replenished and replaced through the feed pipe 5 and the discharge pipe 6 to ensure a stable heat exchange environment.

[0051] When the medium to be treated flows inside the through pipe 2, the heat exchange medium continuously flows inside the heat exchange coil 3-2 wrapped around the outside of the through pipe 2. The two form a heat transfer interface through the pipe wall and the thermally enhanced structure of the through pipe 2. Since the heat exchange coil 3-2 adopts a spiral winding design, the contact area with the through pipe 2 is increased, and the coil spacing is evenly distributed, ensuring the uniformity and efficiency of heat exchange. The medium to be treated and the heat exchange medium complete heat transfer during the counter-current or co-current flow process, realizing cooling or heating treatment, and meeting the temperature requirements of the dichloropropylene production process for the medium.

[0052] The filter screens 3-4 inside pipe 2 are arranged sequentially along the direction of media flow, with the mesh diameter decreasing gradually. When the media flows through the filter screens 3-4, large particles of impurities are first intercepted by the filter screens 3-4 with larger mesh sizes at the front end, and then small impurities are captured by the subsequent filter screens 3-4 with smaller mesh sizes, forming a stepped filtration effect. The gathering cover 7 in front of each filter screen 3-4 can guide the media to concentrate through the filtration area, avoid impurities from accumulating on the inner wall of pipe 2, improve filtration efficiency, and ensure that the purity of the output media meets production standards.

[0053] The positioning and mounting assembly 4 achieves flexible fixation of the heat exchanger through an adjustable structure. After the connecting frame 4-1 is fixedly connected to the heat exchange box 1, the swing sleeve 4-4 can rotate freely around the positioning shaft 4-3. Combined with the screw mounting sliding hole 4-6 on the mounting plate 4-5, the installation angle and fixing point can be adjusted within a range of multiple angles and positions. This design allows the heat exchanger to adapt to different installation environments. At the same time, during equipment operation, vibration stress can be released through fine adjustment to ensure the stability of the overall structure.

[0054] In addition, the sealing structure of each component plays a key role in ensuring operation. The sealing treatment between pipe 2 and heat exchange box 1 prevents leakage of heat exchange medium, and the joint sealing between liquid inlet pipe 3-1, liquid outlet pipe 3-3 and heat exchange coil 3-2 ensures the integrity of the heat exchange medium flow path. These sealing designs together maintain the normal working pressure and medium flow direction of the heat exchanger, ensuring the stable realization of heat exchange and filtration functions.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A heat exchanger for dichloropropylene production, characterized in that, include: A heat exchange box (1) is provided with a through pipe (2) inserted inside the heat exchange box (1); A plug-in heat exchange assembly (3) is disposed inside the heat exchange box (1); Positioning and mounting assembly (4), which is disposed on the outside of the heat exchange box (1); The plug-in heat exchange assembly (3) includes an inlet pipe (3-1), which is disposed on the heat exchange box (1). One end of the inlet pipe (3-1) is inserted into the heat exchange box (1), and the end of the inlet pipe (3-1) is connected to a heat exchange coil (3-2). The heat exchange coil (3-2) is wound around the through pipe (2), and the end of the heat exchange coil (3-2) is provided with an outlet pipe (3-3). The end of the outlet pipe (3-3) extends out of the bottom surface of the heat exchange box (1).

2. The heat exchanger for dichloropropylene production according to claim 1, characterized in that, The passage pipe (2) is provided with a filter screen (3-4) inside. There are several filter screens (3-4), and several filter screens (3-4) are arranged in a straight line inside the passage pipe (2). The diameter of the filter mesh of several filter screens (3-4) decreases successively.

3. A heat exchanger for dichloropropylene production according to claim 1, characterized in that, The positioning and mounting assembly (4) includes a connecting frame (4-1), which is disposed on the outer side wall of the heat exchange box (1). The side wall of the connecting frame (4-1) is provided with a positioning hole (4-2), and a positioning shaft (4-3) is disposed inside the positioning hole (4-2). A swing sleeve (4-4) is fitted on the positioning shaft (4-3), and an mounting plate (4-5) is disposed on the outer side wall of the swing sleeve (4-4).

4. A heat exchanger for dichloropropylene production according to claim 3, characterized in that, The mounting plate (4-5) is fixedly connected to the swing sleeve (4-4), and the mounting plate (4-5) has a screw mounting sliding hole (4-6).

5. A heat exchanger for dichloropropylene production according to claim 1, characterized in that, The heat exchange box (1) is provided with a feed pipe (5) on its upper end face and a discharge pipe (6) on its lower end face. The feed pipe (5) and the discharge pipe (6) are positioned corresponding to each other.

6. A heat exchanger for dichloropropylene production according to claim 1, characterized in that, Both ends of the through pipe (2) are provided with insertion slots (8), and both ends of the through pipe (2) extend out of the heat exchange box (1).

7. A heat exchanger for dichloropropylene production according to claim 2, characterized in that, The inside of the through pipe (2) is provided with a gathering cover (7), and each of the filter screens (3-4) is provided with a gathering cover (7) on one side.

8. A heat exchanger for dichloropropylene production according to claim 1, characterized in that, The heat exchange box (1) and the through pipe (2) are sealed and connected together.

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