Novel heat exchanger capable of preventing material deposition

Abstract

The novel heat exchanger comprises a supporting shell, the interior of the supporting shell is hollow, a heat exchange cavity is formed in the supporting shell, a shell pass inlet and a shell pass outlet which are communicated with the heat exchange cavity are further formed in the supporting shell, an inner sleeve is fixedly arranged in the heat exchange cavity, and the two ends of the inner sleeve are open. Gaps are reserved between the two ends of the inner sleeve and the two ends of the heat exchange cavity and between the cylinder wall of the inner sleeve and the inner wall of the supporting shell, a heat exchange pipe is further arranged in the heat exchange cavity, and the two ends of a heat exchange pipe body penetrate through the supporting shell to extend to the outer side of the supporting shell to form a pipe pass inlet and a pipe pass outlet; the inner sleeve is used for driving a heat exchange medium in the heat exchange cavity to stir in the radial section and squeezing the heat exchange medium into the inner sleeve in the axial direction. The stirrer and the inner sleeve are additionally arranged in the heat exchanger, so that the problem that a heat exchange medium deposits at the bottom of the heat exchanger and deposits and adheres to the outer wall of the heat exchange pipe is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, in particular to a novel heat exchanger capable of preventing material deposition. Background Art

[0002] A heat exchanger is an energy-saving device that transfers heat between two or more fluids at different temperatures. It transfers heat from a higher-temperature fluid to a lower-temperature fluid, allowing the fluid temperature to reach the process's specified indicators to meet the needs of process conditions. It is also one of the main devices for improving energy utilization. With the development of science and technology, heat exchangers have played an important role in industrial production in the chemical, petroleum, power, food, and many other industries or fields. Heat exchangers can be used as heaters, coolers, condensers, evaporators, and reboilers, and are widely used. For example, in the field of sewage treatment, sludge thermochemical treatment can achieve rapid dehydration and reduction of sludge, as well as heavy metal solidification and virus inactivation. The biochar produced at the same time has the prospect of resource utilization. Therefore, the industry is strengthening the development of sludge thermochemical technology.

[0003] Heat exchangers are often used in the operation of sludge thermochemical treatment. Heat exchangers can realize energy recovery and improve energy utilization efficiency. However, a key problem of heat exchangers is sludge deposition and adhesion. A large amount of sludge is deposited on the outer surface of the heat exchanger pipe. As time goes by, the heat exchanger pipe is wrapped by a thick layer of sludge, resulting in a decrease in the heat exchange efficiency of the heat exchanger and a large amount of energy waste (30% to 40%). At the same time, sludge deposition causes greater process resistance and greater wear and tear on pipelines and equipment. These problems limit the promotion of thermochemical technology. Utility Model Content

[0004] The purpose of the utility model is to provide a new type of heat exchanger that prevents material deposition, so as to solve the technical problems described in the background technology.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] The heat exchanger of claim 1, wherein the heat exchanger has a first end connected to the second end of the heat exchanger and a second end to the second end of the heat exchanger. The heat exchanger has a first end connected to the second end of the heat exchanger and a second end to the second end of the heat exchanger. The heat exchanger has a first end connected to the second end of the heat exchanger and a second end to the second end of the heat exchanger. The heat exchanger has a first end connected to the second end of the heat exchanger and a second end to the second end of the heat exchanger.

[0007] Preferably, the agitator includes a stirring assembly and a driving assembly, the stirring assembly is arranged in the heat exchange chamber, the driving assembly is arranged outside the heat exchange chamber, and the driving assembly is connected to the stirring assembly through a magnetic coupling and provides power to the stirring assembly.

[0008] Preferably, a protective cover is fixedly provided on the inner wall of the support shell at one end of the heat exchange chamber, an equipment compartment is fixedly provided on the end of the support shell at which the stirrer is provided, a drive chamber is provided in the equipment compartment, and the drive chamber and the heat exchange chamber are independent of each other, a support partition is fixedly provided on the inner wall of the equipment compartment in the middle of the drive chamber, the support partition divides the drive chamber into two chambers, the magnetic coupling includes an inner magnetic pole arranged in the protective cover and an outer magnetic pole arranged in the chamber on the side of the drive chamber close to the heat exchange chamber, the stirring assembly includes an inner rotating shaft and a stirring blade, the inner rotating shaft is provided with a plurality of inner rotating shafts and a plurality of stirring blades. One end is fixed at the axial center position of the inner magnetic pole, and the other end passes through the protective cover and extends to the mouth of the inner sleeve, and the inner shaft is rotatably installed on the protective cover at the penetration position through the inner bearing, and the stirring blade is fixedly installed on one end of the inner shaft close to the inner sleeve, and the driving assembly includes a driving motor arranged in a chamber on the side of the driving chamber away from the heat exchange chamber, and the driving shaft of the driving motor is connected to the outer shaft through a coupling, and the outer shaft passes through the support partition and is rotatably installed on the support partition at the penetration position through the outer bearing, and the end of the outer shaft extends to the axial center of the outer magnetic pole and is fixedly connected to the outer magnetic pole.

[0009] Preferably, the distance between the two ends of the inner sleeve and the two ends of the heat exchange chamber is between 0.8 times and 1.2 times the maximum inner diameter of the inner sleeve.

[0010] Preferably, the shell-side inlet and the shell-side outlet are respectively located at two ends of the heat exchange chamber that are far away from each other.

[0011] Preferably, the tube-side inlet and the tube-side outlet are respectively located at two ends of the heat exchange chamber that are far away from each other.

[0012] Compared with the existing technology, the beneficial effects of the present invention are as follows: the present invention is optimized and improved on the basis of the traditional heat exchanger. First, by adding an agitator inside the heat exchanger, the problem of heat exchange medium deposition at the bottom of the heat exchanger is solved; second, by adding an inner sleeve inside the heat exchanger, the heat exchange medium is made to perform eddy motion under the action of the agitator, thereby enhancing the agitation of the heat exchange medium and solving the problem of heat exchange medium deposition on the heat exchanger tube wall; third, the agitator adopts magnetic stirring to realize non-contact power transmission stirring, solves the leakage and safety problems caused by dynamic seal stirring, and provides a solution for the stirring needs in high temperature, high pressure and complex acid-base reaction environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and / or other aspects and advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings. These drawings are only illustrative and do not limit the present invention, wherein:

[0014] Figure 1 This is a structural schematic diagram of a new type of heat exchanger for preventing material deposition involved in the present utility model.

[0015] Figure numerals: 1. Support shell; 2. Heat exchange chamber; 3. Shell-side inlet; 4. Shell-side outlet; 5. Heat exchange tube; 6. Tube-side inlet; 7. Tube-side outlet; 8. Inner sleeve; 9. Protective cover; 10. Equipment compartment; 11. Drive chamber; 12. Support partition; 13. Stirring assembly; 1301. Stirring blade; 1302. Inner rotating shaft; 1303. Inner bearing; 14. Magnetic coupling; 1401. Outer magnetic pole; 1402. Inner magnetic pole; 15. Drive assembly; 1501. Drive motor; 1502. Outer rotating shaft; 1503. Outer bearing. DETAILED DESCRIPTION

[0016] Below, embodiments of a novel heat exchanger for preventing material deposition according to the present invention will be described with reference to the accompanying drawings. The embodiments described herein are specific implementations of the present invention, intended to illustrate the concepts of the present invention. They are illustrative and exemplary only and should not be construed as limiting the implementation and scope of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other readily apparent technical solutions based on the claims and disclosure of this application. These solutions include any readily apparent substitutions or modifications to the embodiments described herein.

[0017] In the description of the present invention, it should be noted that the terms "front," "back," "left," "right," "top," "bottom," "upper," "lower," "inner," "outer," "horizontal," "vertical," "upright," and "oblique" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] The accompanying drawings in this specification are schematic diagrams that assist in illustrating the concepts of the present invention and schematically illustrate the shapes of the various components and their interrelationships. Please note that to clearly illustrate the structures of the various components of the embodiments of the present invention, the drawings are not drawn to the same scale. The same reference numerals are used to indicate the same parts.

[0019] The following describes the principles and features of the present invention in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. Figure 1 , the preferred embodiments of the present invention are further described in detail:

[0020] like Figure 1 As shown, the utility model is preferably a new type of heat exchanger for preventing material deposition, comprising a support shell 1, the support shell 1 is hollow inside and forms a heat exchange chamber 2, and the support shell 1 is further provided with a shell-side inlet 3 and a shell-side outlet 4 communicating with the heat exchange chamber 2, an inner sleeve 8 is fixedly provided inside the heat exchange chamber 2, the inner sleeve 8 is open at both ends, and there is a gap between its two ends and the two ends of the heat exchange chamber 2, and there is also a gap between its sleeve wall and the inner wall of the support shell 1, and a heat exchange tube 5 is further provided in the heat exchange chamber 2 The heat exchange tube 5 is arranged in a serpentine shape in the heat exchange chamber 2, and both ends of the tube body respectively penetrate the support shell 1 and extend to the outside of the support shell 1 to form a tube-side inlet 6 and a tube-side outlet 7. The heat exchange tubes 5 at the tube-side inlet 6 and the tube-side outlet 7 are sealed and fixed to the support shell 1 at the penetration position. A stirrer is also provided in the heat exchange chamber 2. The stirrer is arranged at the end of the inner sleeve 8 and is used to drive the heat exchange medium in the heat exchange chamber 2 to stir in the radial cross section and squeeze the heat exchange medium into the inner sleeve 8 along the axial direction.

[0021] The design form of the agitator can be determined according to the needs. However, considering the dynamic sealing problem, in order to prevent the agitator from causing the risk of leakage of the heat exchange medium in the heat exchange chamber 2 during stirring, the present application optimizes the design of the traditional stirring form. The agitator includes a stirring component 13 and a driving component 15. The stirring component 13 is arranged in the heat exchange chamber 2, and the driving component 15 is arranged outside the heat exchange chamber 2. The driving component 15 is connected to the stirring component 13 through a magnetic coupling 14 and provides power to the stirring component 13. Specifically, the heat exchange chamber 2 is provided with a stirrer. A protective cover 9 is fixedly provided on the inner wall of the support shell 1 at the end, and an equipment cabin 10 is fixedly provided at one end of the support shell 1 where the stirrer is provided, a driving chamber 11 is provided in the equipment cabin 10, and the driving chamber 11 and the heat exchange chamber 2 are independent of each other, and a supporting partition 12 is fixedly provided on the inner wall of the equipment cabin 10 in the middle of the driving chamber 11, and the supporting partition 12 divides the driving chamber 11 into two chambers, the magnetic coupling 14 includes an inner magnetic pole 1402 provided in the protective cover 9 and an outer magnetic pole 1401 provided in the chamber on the side of the driving chamber 11 close to the heat exchange chamber 2, and the stirring group The component 13 includes an inner rotating shaft 1302 and a stirring blade 1301. One end of the inner rotating shaft 1302 is fixed at the axis position of the inner magnetic pole 1402, and the other end passes through the protective cover 9 and extends to the tube mouth of the inner sleeve 8. The inner rotating shaft 1302 is rotatably mounted on the protective cover 9 at the penetration position through the inner bearing 1303. The stirring blade 1301 is fixedly mounted on the end of the inner rotating shaft 1302 close to the inner sleeve 8. The driving assembly 15 includes a driving motor 1501 arranged in the chamber on the side of the driving chamber 11 away from the heat exchange chamber 2. The driving shaft of the driving motor 1501 is connected to the inner sleeve 8. The shaft is connected to an outer rotating shaft 1502, which passes through the support partition 12 and is rotatably mounted on the support partition 12 at the penetration position via an outer bearing 1503. The end of the outer rotating shaft 1502 extends to the axis of the outer magnetic pole 1401 and is fixedly connected to the outer magnetic pole 1401. The outer magnetic pole 1401 and the inner magnetic pole 1402 of the magnetic coupling 14 form a pair of magnetic dipoles, through which power is transmitted. In addition, the outer magnetic pole 1401 and the inner magnetic pole 1402 are physically isolated by the shell wall of the support shell 1, thereby avoiding leakage and safety issues.

[0022] In order to ensure that the inner sleeve 8 can form a stable vortex in the heat exchange chamber 2 in cooperation with the agitator after it is set, the distance between the two ends of the inner sleeve 8 and the two ends of the heat exchange chamber 2 is between 0.8 times and 1.2 times the maximum inner diameter of the inner sleeve 8. In this way, the heat exchange medium in the heat exchange chamber 2 can be gradually squeezed into the inner sleeve 8 under the action of the agitator, and then the heat exchange medium in the inner sleeve 8 flows along the inner sleeve 8 to the end of the inner sleeve 8 away from the agitator and is deflected and returned under the action of the end plate of the heat exchange chamber 2. Then, it flows back to the agitator along the channel between the inner sleeve 8 and the inner wall of the support shell 1, and then repeats the previous movement to form a vortex.

[0023] In order to make full use of the space of the heat exchange chamber 2, the shell-side inlet 3 and the shell-side outlet 4 are respectively located at the two ends of the heat exchange chamber 2 that are away from each other, and the tube-side inlet 6 and the tube-side outlet 7 are respectively located at the two ends of the heat exchange chamber 2 that are away from each other, and the shell-side inlet 3 and the shell-side outlet 4, as well as the tube-side inlet 6 and the tube-side outlet 7 are all arranged diagonally. Of course, depending on the purpose of heat exchange (i.e., whether a refrigerant or a heat medium is provided in the heat exchange chamber 2), the positions of the shell-side inlet 3 and the shell-side outlet 4 can be swapped. Similarly, the positions of the tube-side inlet 6 and the tube-side outlet 7 can also be swapped according to different needs.

[0024] The heat exchanger in the present invention can be set as a vertical structure or a horizontal structure according to the use requirements. Of course, in order to reduce the floor space and give full play to the functions of the agitator + inner sleeve 8, the vertical setting is better, that is, the equipment cabin 10 is fixed to the bottom end of the support shell 1, and the agitator is set at the bottom of the heat exchange chamber 2;

[0025] The heat exchange tubes 5 are interconnected heat exchange pipes arranged in the heat exchange chamber 2. Their specific location can be determined according to the heat exchange purpose and the flow pattern of the fluid in the heat exchange chamber 2. In order to reduce the adhesion of the heat exchange medium to the tube wall and reduce the flow resistance of the heat exchange medium, the heat exchange tubes 5 are preferably placed in the inner cavity of the inner sleeve 8 with a relatively large space and arranged in a serpentine shape with vertical folds.

[0026] For the purpose of convenient maintenance, the bottom end of the equipment compartment 10 can be set to be open or detachable. When open, the drive motor 1501 can be directly placed on the structural surface to achieve support through the structural surface.

[0027] Example 1

[0028] This embodiment is an example of sludge wet oxidation reaction. The reactor as a whole is a shell and tube heat exchanger with a cylindrical tank structure. The specifications are a total height of 7 meters, a diameter of 1.2 meters, and an effective height of 6 meters. The inner sleeve 8 is cylindrical, with a diameter of 1 meter and a height of 4 meters. It is 1 meter away from the upper and lower bottoms of the heat exchange chamber 2. The agitator power is 10 kwh, and the agitator shaft (inner rotating shaft 1302 and outer rotating shaft 1502) is made of 316 stainless steel. The moisture content of the material is 90%, the pH is 4-10, the pressure is 2-3 MPa, and the temperature is 60-250°C.

[0029] During specific operation, the cold sludge enters the heat exchange tube 5 from the tube side inlet 6, and flows out from the tube side outlet 7 after heat exchange. The returned hot sludge enters the heat exchange chamber 2 from the shell side inlet 3, and flows out from the shell side outlet 4 after heat exchange. The two cold and hot fluids in the tube side and shell side of the heat exchanger exchange heat to complete heat recovery; the sludge in the heat exchange chamber 2 is horizontally stirred by the stirring blade 1301, and is squeezed into the inner sleeve 8 from the bottom opening of the inner sleeve 8, and then moves upward along the inner sleeve 8 to the inner wall of the top end of the support shell 1 and turns back, and then flows downward through the channel formed by the inner wall of the support shell 1 and the outer wall of the inner sleeve 8, forming upper and lower vortexes, in which the sludge is suspended under the double stirring action, which solves the problem of sludge deposition on the outer wall of the heat exchange tube 5. The agitator and The setting of the inner sleeve 8 enhances the flow of sludge in the heat exchange chamber 2, thereby enhancing the heat exchange effect. The enhanced heat exchange effect further improves the fluidity of the sludge, making the rotation of the stirring blade 1301 and the inner rotating shaft 1302 smoother. The two promote each other. At the same time, the setting of the inner sleeve 8 promotes the generation of vortexes, improves the fluidity of sludge, and gives full play to the stirring function of the agitator. Moreover, the agitator is arranged at the bottom of the heat exchange chamber 2. Compared with the traditional rod-type agitator with the problems of overall penetration, large space occupation and low stirring intensity, the agitator is arranged at the bottom of the heat exchanger, which fully saves space. On the other hand, because the sludge is deposited below the heat exchange chamber 2, the agitator arranged below will further improve the stirring efficiency and produce a better stirring effect.

[0030] Of course, the heat exchange material of the present invention is not limited to fluidized sludge. All fluidized materials with similar characteristics, such as chemical fluids, can be applied. At the same time, the present invention has better applicability and superiority for heat exchange scenarios under high temperature, high pressure and acid-base environments.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new type of heat exchanger for preventing material deposition, characterized by: The invention comprises a support shell (1), wherein the support shell (1) is hollow inside and forms a heat exchange cavity (2), and the support shell (1) is further provided with a shell-side inlet (3) and a shell-side outlet (4) communicating with the heat exchange cavity (2), an inner sleeve (8) is fixedly provided inside the heat exchange cavity (2), and both ends of the inner sleeve (8) are open, and gaps are left between the two ends and the two ends of the heat exchange cavity (2), and a gap is also left between the sleeve wall and the inner wall of the support shell (1), and a heat exchange tube (5) is further provided in the heat exchange cavity (2), and the heat exchange tube (5) is fixedly provided in the heat exchange cavity (2) is arranged in a serpentine shape, and both ends of the tube body respectively penetrate the support shell (1) and extend to the outside of the support shell (1) to form a tube-side inlet (6) and a tube-side outlet (7), and the heat exchange tubes (5) at the tube-side inlet (6) and the tube-side outlet (7) are sealed and fixed to the support shell (1) at the penetration position. A stirrer is also provided in the heat exchange chamber (2), and the stirrer is arranged at the end of the inner sleeve (8) to drive the heat exchange medium in the heat exchange chamber (2) to stir in the radial section and squeeze the heat exchange medium into the inner sleeve (8) along the axial direction.

2. The novel heat exchanger for preventing material deposition according to claim 1 is characterized in that: The stirrer comprises a stirring assembly (13) and a driving assembly (15), wherein the stirring assembly (13) is arranged in the heat exchange chamber (2), and the driving assembly (15) is arranged outside the heat exchange chamber (2), and the driving assembly (15) is connected to the stirring assembly (13) through a magnetic coupling (14) and provides power for the stirring assembly (13).

3. The novel heat exchanger for preventing material deposition according to claim 2 is characterized in that: The heat exchange chamber (2) is provided with a protective cover (9) fixedly provided on the inner wall of the support shell (1) at one end of the stirrer, and the support shell (1) is provided with an equipment cabin (10) fixedly provided on the end of the stirrer, and a driving chamber (11) is provided in the equipment cabin (10), and the driving chamber (11) and the heat exchange chamber (2) are independent of each other, and a supporting partition (12) is fixedly provided on the inner wall of the equipment cabin (10) in the middle of the driving chamber (11), and the supporting partition (12) divides the driving chamber (11) into two chambers, and the magnetic coupling (14) includes an inner magnetic pole (1402) provided in the protective cover (9) and an outer magnetic pole (1401) provided in the chamber on the side of the driving chamber (11) close to the heat exchange chamber (2), and the stirring assembly (13) includes an inner rotating shaft (1302) and a stirring blade (1301), and one end of the inner rotating shaft (1302) is fixed to the inner magnetic pole (1402) is located at the axis center, and the other end passes through the protective cover (9) and extends to the tube mouth of the inner sleeve (8), and the inner rotating shaft (1302) is rotatably installed at the protective cover (9) at the penetration position through the inner bearing (1303), and the stirring blade (1301) is fixedly installed at one end of the inner rotating shaft (1302) close to the inner sleeve (8), and the driving assembly (15) includes a driving motor (1501) arranged in a chamber on the side of the driving chamber (11) away from the heat exchange chamber (2), and the driving shaft of the driving motor (1501) is connected to the outer rotating shaft (1502) through a coupling, and the outer rotating shaft (1502) passes through the supporting partition (12) and is rotatably installed at the supporting partition (12) at the penetration position through the outer bearing (1503), and the end of the outer rotating shaft (1502) extends to the axis center of the outer magnetic pole (1401) and is fixedly connected to the outer magnetic pole (1401).

4. The novel heat exchanger for preventing material deposition according to claim 1 is characterized in that: The distance between the two ends of the inner sleeve (8) and the two ends of the heat exchange cavity (2) is between 0.8 times and 1.2 times the maximum inner diameter of the inner sleeve (8).

5. The novel heat exchanger for preventing material deposition according to claim 1 is characterized in that: The shell-side inlet (3) and the shell-side outlet (4) are respectively located at two ends of the heat exchange chamber (2) that are away from each other.

6. The novel heat exchanger for preventing material deposition according to claim 1 is characterized in that: The tube-side inlet (6) and the tube-side outlet (7) are respectively located at two ends of the heat exchange cavity (2) that are away from each other.

Images