Drying device for internal pipeline of heat exchanger

Abstract

The utility model relates to a heat exchanger internal pipeline drying device which is used for a heat exchanger and comprises a high-pressure fan used for sucking gas. The heater is connected with the high-pressure fan, and the heater is used for heating air sucked by the high-pressure fan to form hot air flow; and the flow divider is connected between the heater and the heat exchanger, and the flow divider is used for dividing the hot air flow generated by the heater into the heat exchanger. The heat exchanger has the effect of rapidly drying the pipelines in the heat exchanger.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drying the internal pipeline of a heat exchanger, and in particular to a drying device for the internal pipeline of a heat exchanger. BACKGROUND

[0002] Currently, as a key equipment in industrial production, heat exchangers are widely used in chemical industry, energy industry, refrigeration industry and other fields. The core function of the heat exchanger is to realize efficient heat transfer. However, in the actual operation process, the internal pipeline of the heat exchanger is prone to affect the heat transfer efficiency due to the humid environment or residual condensate, and even cause corrosion and scaling problems, thereby shortening the service life of the equipment. In order to ensure the normal operation of the heat exchanger, it is particularly important to regularly dry the internal pipeline of the heat exchanger.

[0003] Currently, in order to solve the problem of moisture in the internal pipeline of the heat exchanger, the industry usually adopts the following methods: one is to dry the heat exchanger for a long time by natural ventilation; the other is to use compressed air to sweep out the moisture in the pipeline by high-pressure airflow. Although these methods can achieve a certain drying effect, they still have many limitations in actual application.

[0004] The above methods generally have the problems of low drying efficiency, high energy consumption or complex operation. For example, the natural ventilation method is limited by environmental conditions and takes too long to dry; the compressed air sweeping method may cause incomplete drying in some local areas due to uneven airflow. Therefore, a high-efficiency and easy-to-implement drying device is needed to overcome the defects of the prior art and meet the demand for rapid drying of the internal pipeline of the heat exchanger. CONTENT OF THE INVENTION

[0005] In order to solve the above technical problems, the present application provides a drying device for the internal pipeline of a heat exchanger.

[0006] The drying device for the internal pipeline of a heat exchanger provided by the present application adopts the following technical scheme: a drying device for the internal pipeline of a heat exchanger, for a heat exchanger, comprising:

[0007] a high-pressure fan, which is used to suck clean gas and form high-pressure clean gas;

[0008] a heater connected to the air outlet of the high-pressure fan, which is used to heat the high-pressure clean gas sucked by the high-pressure fan to form a high-temperature high-pressure hot gas flow; and

[0009] a flow divider connected between the heater and the heat exchanger, which is used to divide the high-temperature high-pressure hot gas flow generated by the heater into each branch pipeline included in the heat exchanger.

[0010] By adopting the technical scheme, the high-pressure fan inhales the gas and delivers it to the heater, the high-pressure clean gas inhaled by the high-pressure fan is heated to form a high-temperature and high-pressure hot gas flow, and then the diverter divides the hot gas flow into the heat exchanger. The scheme can effectively realize the drying of the internal pipeline of the heat exchanger, ensure that the residual moisture in the pipeline is fully removed, thereby avoiding the corrosion or scaling problem caused by dampness, and prolonging the service life of the heat exchanger.

[0011] Preferably, the heater comprises a shell, a heat-conducting member and a heating assembly, the heat-conducting member is provided with a plurality of and located in the shell, and the heating assembly is located outside the shell and connected with the heat-conducting member, and the heating assembly is used to provide heat source to the heat-conducting member.

[0012] By adopting the technical scheme, the shell of the heater is provided with a plurality of heat-conducting members, and the external heating assembly provides heat source to the heat-conducting member, which can effectively improve the heat conduction efficiency and ensure that the inhaled air is fully heated to form a high-temperature hot gas flow, thereby providing a stable heat source for the drying of the internal pipeline of the heat exchanger.

[0013] Preferably, the heat-conducting member is arranged in a staggered manner on the upper surface and the lower surface of the inner wall of the shell, and adjacent heat-conducting members are arranged in a spaced manner, and the length of the heat-conducting member is less than the thickness of the shell, and the heat-conducting member is integrally connected by a plurality of heat-conducting pipes.

[0014] By adopting the technical scheme, after the high-pressure fan inhales the gas, the gas is heated by the heater to form a hot gas flow, and the hot gas flow is uniformly introduced into the heat exchanger through the diverter to realize effective drying of the internal pipeline of the heat exchanger. The heat-conducting member is arranged in a staggered manner on the upper surface and the lower surface of the inner wall of the shell, and the adjacent heat-conducting members are arranged in a spaced manner and the length of the heat-conducting member is less than the thickness of the shell, which can increase the contact area of the hot gas flow and the heat-conducting member and improve the heat exchange efficiency; the heat-conducting member is integrally connected by a plurality of heat-conducting pipes, which further enhances the structural stability and the uniformity of heat conduction, effectively avoids the local overheating phenomenon, and improves the overall drying effect.

[0015] Preferably, the heat-conducting member is provided with two, and the heat-conducting member is a spiral heat-conducting pipe.

[0016] By adopting the technical scheme, the contact area of the gas flow and the heat-conducting member can be increased, thereby improving the heat exchange efficiency, reducing the energy loss in the heat conduction process, and effectively improving the overall heating performance of the heater.

[0017] Preferably, the diverter comprises a primary diverter and a secondary diverter, the primary diverter is connected with the heater to divide the high-temperature and high-pressure hot gas flow into at least two gas paths, one end of the secondary diverter is connected with the primary diverter, and the other end is connected with the inlet of the heat exchanger, and the secondary diverter is used to divide the at least two gas paths into a plurality of gas paths.

[0018] By adopting the above technical scheme, the primary flow dividing member can adopt a Y-shaped structure, which can effectively preliminarily divide the hot air flow generated by the heater, reduce the pressure loss caused by the concentration of the air flow, and improve the uniformity of the distribution of the hot air flow; the secondary flow dividing member further guides the hot air flow to the inlet of the heat exchanger, ensuring that the hot air flow can fully cover the internal pipeline of the heat exchanger, thereby improving the drying efficiency and effect.

[0019] Preferably, the secondary flow dividing member is provided with a first flow dividing area and a second flow dividing area, and the first flow dividing area and the second flow dividing area are respectively provided in communication with the primary flow dividing member through the hot air pipes.

[0020] By adopting the above technical scheme, multi-stage flow dividing and precise distribution of the hot air flow are realized. Specifically, the primary flow dividing member adopts a Y-shaped structure, which can preliminarily divide the hot air flow generated by the heater into two paths, and the secondary flow dividing member is further divided into a first flow dividing area and a second flow dividing area, which are respectively in communication with the primary flow dividing member through the hot air pipes, thereby ensuring that the hot air flow is more uniformly distributed to different areas inside the heat exchanger. This design effectively improves the drying efficiency while ensuring the uniformity of the heating of the internal pipeline of the heat exchanger, avoiding the problems of local overheating or insufficient drying.

[0021] Preferably, the first flow dividing area and the second flow dividing area are each provided with a plurality of connecting ports, and the connecting ports are connected with hoses.

[0022] By adopting the above technical scheme, the heat exchanger internal pipeline drying device can realize more uniform distribution of the hot air flow and more flexible connection of the pipeline, and the hoses are made of high-temperature-resistant materials. The specific effects are as follows: 1. By providing a plurality of connecting ports in the first flow dividing area and the second flow dividing area and connecting the hoses, the hot air flow can be more uniformly distributed to different pipelines of the heat exchanger, thereby improving the drying efficiency and effect; 2. The use of the hoses increases the flexibility of the device, which is convenient for adjusting the delivery direction and position of the hot air flow according to actual needs, and adapts to the pipeline layout of heat exchangers of different structures.

[0023] Preferably, a ball valve is arranged between the hose and the connecting port.

[0024] By adopting the above technical scheme, the controllability of the connection between the hose and the connecting port is realized. The arrangement of the ball valve can effectively control the on-off of the hot air flow, thereby flexibly adjusting the delivery state of the hot air flow according to actual needs, improving the operation flexibility and energy utilization efficiency of the drying device. At the same time, the addition of the ball valve helps to protect the hose, avoiding accelerated aging or damage due to long-term exposure to the hot air flow.

[0025] Preferably, an air filter is further included, which is arranged in communication with the high-pressure fan, and the air filter is provided with a return pipe connected to the outlet of the heat exchanger.

[0026] By adopting the above technical scheme, the gas sucked by the high-pressure fan can be effectively removed after being filtered by the air filter, so as to avoid impurities from entering the inside of the drying device and affecting the normal work of the heater and the flow divider. Meanwhile, the backflow pipe of the air filter is connected to the outlet of the heat exchanger, so that the gas not fully utilized can be recycled, thereby improving the energy utilization rate and reducing emissions.

[0027] Preferably, the heat exchanger outlet position is also provided with a temperature and humidity sensor.

[0028] By adopting the above technical scheme, the temperature and humidity of the heat exchanger outlet position are monitored in real time. The specific effects are as follows: by setting the temperature and humidity sensor at the heat exchanger outlet position, the temperature and humidity changes of the internal pipeline of the heat exchanger during the drying process can be accurately detected, data support for the drying effect is provided, and the stability and reliability of the drying process are ensured.

[0029] In summary, the present application has at least one of the following beneficial technical effects:

[0030] 1. The combination of the high-pressure fan and the heater can produce high-temperature hot gas flow, effectively improve the drying efficiency of the internal pipeline of the heat exchanger, and avoid corrosion and scaling problems caused by moisture;

[0031] 2. The setting of the flow divider makes the hot gas flow uniformly distributed in the heat exchanger, ensuring that each area is fully dried, and solving the problem of incomplete drying in local areas in the traditional method;

[0032] 3. The backflow pipe setting makes the hot gas flow in the heat exchanger flow quickly and the gas circulate. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a structure schematic diagram of a heat exchanger internal pipeline drying device provided by the first embodiment of the present application;

[0034] Figure 2 is a structure schematic diagram of a heater in Figure 1 ;

[0035] Figure 3 is a structure schematic diagram of a heat exchanger internal pipeline drying device provided by the second embodiment of the present application;

[0036] Figure 4 is another structure schematic diagram of a heater provided in Figure 3 ;

[0037] Explanation of reference signs: 1, heat exchanger; 2, high-pressure fan; 3, heater; 31, shell; 32, heat-conducting member; 33, heating assembly; 331, heat-conducting pipe; 3311, groove; 332, spiral heat-conducting pipe; 4, flow divider; 41, first-stage flow divider; 42, second-stage flow divider; 421, first flow dividing area; 422, second flow dividing area; 4221, connecting port; 43, hot air pipe; 44, hose; 45, ball valve; 5, air filter; 6, return pipe; 7, temperature and humidity sensor. DETAILED DESCRIPTION

[0038] The following will be described in detail below with reference to the accompanying drawings. Figures 1-4 The present application is further described in detail.

[0039] The present application discloses a heat exchanger internal pipeline drying device.

[0040] Embodiment one

[0041] Reference Figure 1 A heat exchanger internal pipeline drying device includes a high-pressure fan 2, a heater 3, and a flow divider 4.

[0042] The high-pressure fan 2 is used to suck in gas, and traditional low-efficiency air blowing has a pressure of 0.1-0.3 MPa, but the efficiency is low and residual water cannot be completely removed. The decisive factors of the pressure include the length, bending degree, and structure such as narrowing and expansion of the pipeline, which all increase the resistance of the airflow. The more complex the pipeline is, the higher the required pressure is.

[0043] The selection of the pressure value depends on the total length of the heat exchanger 1 pipeline and the number of loops. The longer the pipeline is and the more the number of loops is, the greater the total resistance is, and the higher the required pressure is. It also depends on the target airflow speed: in order to quickly evaporate residual water, it is necessary to ensure sufficient airflow speed, and the higher the airflow speed is, the higher the required pressure is. It also depends on the size of the pipe diameter, which also affects the pressure requirement, and a smaller pipe diameter requires a greater pressure. In the present embodiment, the pressure value of the high-pressure fan can be set according to actual requirements, and the pressure of the gas after being pressurized is at least greater than 0.3 MPa.

[0044] The heater 3 is connected with the high-pressure fan 2 and is used to heat the air sucked in by the high-pressure fan 2 to form a hot airflow. The flow divider 4 is connected between the heater 3 and the heat exchanger 1 and is used to divide the hot airflow generated by the heater 3 to flow into the heat exchanger 1. This structure design can ensure that the hot airflow is uniformly distributed in the internal pipeline of the heat exchanger 1, thereby improving the drying efficiency. For example, the heater 3 can be used to heat the high-pressure gas into high-temperature and high-pressure gas of 150-300°.

[0045] Specifically, the high-pressure fan 2 adopts a centrifugal high-pressure fan, a rotary fan or a turbine fan, is suitable for a large heat exchanger 1, and has the advantages of large air volume and high pressure. The shell of the high-pressure fan 2 is made of aluminum alloy material, which reduces the weight while ensuring the strength. The motor is selected to be a high-efficiency energy-saving motor, which is matched with a frequency converter to adjust the speed, so that the air volume can be flexibly adjusted according to actual needs.

[0046] With reference to Figure 1 and Figure 2 The heater 3 includes a shell 31, heat-conducting pieces 32 and a heating assembly 33. The heat-conducting pieces 32 are arranged in the shell 31 in a plurality of numbers, and the heating assembly 33 is connected to the heat-conducting pieces 32 outside the shell 31. The heating assembly 33 is electrically heated to provide a heat source to the heat-conducting pieces 32. Specifically, the heat-conducting pieces 32 adopt an integrated connection form of heat-conducting pipes 331. Adjacent heat-conducting pipes 331 are connected to form grooves 3311. The heat-conducting pieces 32 are arranged in a staggered manner on the upper surface and the lower surface of the inner wall of the shell 31. Adjacent heat-conducting pieces 32 are arranged in a spaced manner. The length of the heat-conducting pieces 32 is less than the thickness of the shell 31, so as to ensure the smoothness of the air flow channel, make the air flow in a Z-shaped manner, ensure that the air fully contacts the heat source when passing through, and improve the heat conversion efficiency.

[0047] The flow divider 4 is composed of a primary flow dividing piece 41 and a secondary flow dividing piece 42. The primary flow dividing piece 41 is connected to the heater 3, and the secondary flow dividing piece 42 is connected to the inlet of the heat exchanger 1. The flow divider 4 divides the hot air flow generated by the heater 3 into multiple and enters the inside of the pipeline of the heat exchanger 1.

[0048] Specifically, the primary flow dividing piece 41 can be selected as a Y-shaped structure, for example, it can be a Venturi dynamic flow divider. The primary flow dividing piece 41 can divide the hot air flow into two paths, which respectively enter the first flow dividing area 421 and the second flow dividing area 422 of the secondary flow dividing piece 42. The first flow dividing area 421 and the second flow dividing area 422 are respectively arranged in communication with the primary flow dividing piece 41 through hot air pipes 43, and both the first flow dividing area 421 and the second flow dividing area 422 are provided with a plurality of connecting ports 4221. The connecting ports 4221 are connected with hoses 44, and ball valves 45 are arranged between the connecting ports 4221 and the hoses 44, which are used to control the flow direction and flow rate of the hot air flow, and realize precise adjustment. The hoses 44 are made of high-temperature-resistant silica gel material, which has good flexibility and corrosion resistance, and is suitable for complex field environments.

[0049] In this embodiment, the primary flow dividing piece 41 divides the high-temperature and high-pressure gas discharged from the heater 3 into 2-3 streams of gas, and the secondary flow dividing piece 42 further divides the 2-3 streams of gas into multiple streams of gas (for example, 8-12 streams) matched with the number of branch pipelines of the heat exchanger 1. The flow balance (the flow deviation of each outlet is ≤3%) is realized through a honeycomb-shaped flow guide plate or a multi-hole pressure equalization structure, and the single-path flow rate is controlled through the ball valve 45.

[0050] In addition, the device also includes a temperature and humidity sensor 7, and the heat exchanger 1 is also provided with a temperature and humidity sensor 7 arranged at the outlet position of the heat exchanger 1. The temperature and humidity sensor 7 is arranged at the outlet position of the heat exchanger 1 to monitor the temperature and humidity at the outlet of the heat exchanger 1 in real time, so as to ensure that the drying effect meets the standard.

[0051] The implementation principle of the heat exchanger internal pipeline drying device in the embodiment of the present application is as follows: the high-pressure fan 2 inhales external airflow and pressurizes the airflow to be introduced into the heater 3. The heater 3 heats the airflow to form hot airflow. The hot airflow enters the flow divider 4, is divided into two streams by the first flow dividing element 41, enters the second flow dividing element 42, and is divided into multiple streams by the control ball valve 45. The multiple streams enter the internal pipeline of the heat exchanger 1. The outlet of the heat exchanger 1 is connected to the return pipe 6 to return the airflow to the air filter 5. The temperature and humidity sensor 7 is arranged at the outlet of the heat exchanger 1 to monitor the temperature and humidity at the outlet in real time.

[0052] The high-pressure fan 2 is the core power source of the whole scheme. The high-pressure fan 2 is used to generate high wind pressure and wind speed, so as to ensure that the high-temperature hot air can effectively enter each loop of the heat exchanger 1, high-speed blow the pipeline, and carry away residual water. If there is not enough airflow speed and pressure, the hot air cannot deeply enter each corner of the pipeline, and the purpose of completely removing residual water cannot be achieved. The pipeline of the heat exchanger 1 is complex and has structures such as bending and narrowing, which can generate relatively large airflow resistance. The high-pressure fan 2 needs to provide sufficient pressure to overcome the resistance and make the hot air smoothly pass through the whole pipeline system. The evaporation speed of water is related to the flow speed of air. The high-speed airflow provided by the high-pressure fan 2 can effectively accelerate the evaporation of residual water, reduce the drying time, and improve the working efficiency.

[0053] Embodiment two

[0054] Reference Figure 3 And Figure 4 Compared with the embodiment one, the embodiment further includes the air filter 5. The air filter 5 is arranged in communication with the high-pressure fan 2 and is used to filter impurities in the air to avoid pollution of the pipeline of the heat exchanger 1. Specifically, the air filter 5 is provided with the return pipe 6 connected to the outlet of the heat exchanger 1. The heat-conducting element 32 is a spiral heat-conducting pipe 332. Two spiral heat-conducting pipes 332 are arranged at intervals. The axial direction of the spiral heat-conducting pipe 332 is parallel to the length direction of the shell 31. The pitch and diameter of the spiral heat-conducting pipe 332 can be adjusted according to actual needs to adapt to heat exchangers 1 of different specifications. For example, for a large heat exchanger 1, a spiral heat-conducting pipe 332 with a larger diameter and a denser pitch can be selected. For a small heat exchanger 1, a spiral heat-conducting pipe 332 with a smaller diameter and a sparser pitch can be selected.

[0055] The implementation principle of the embodiment is that the air filter 5 is arranged in communication with the high-pressure fan 2 through the return pipe 6, a recycling mechanism is formed, energy waste is reduced, the flow rate of hot air in the pipeline of the heat exchanger 1 is improved, the heating efficiency is significantly improved by optimizing the structure of the heat-conducting piece 32, and therefore the drying time is further shortened and the overall performance is improved. Meanwhile, the flexible design of the heat-conducting piece 32 provides more selection space for actual application.

[0056] The embodiments of the specific implementation are the preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A heat exchanger internal piping drying device for a heat exchanger (1), characterized in that, The application relates to a high-temperature high-pressure hot air generator. The high-temperature high-pressure hot air generator comprises a high-pressure fan (2) for sucking clean gas and forming high-pressure clean gas; a heater (3) connected with an air outlet of the high-pressure fan (2), the heater (3) being used for heating the high-pressure clean gas sucked by the high-pressure fan (2) to form high-temperature high-pressure hot air; and a flow divider (4) connected between the heater (3) and the heat exchanger (1), the flow divider (4) being used for dividing the high-temperature high-pressure hot air generated by the heater (3) into each branch pipeline included in the heat exchanger (1). The heater (3) comprises a shell (31), heat-conducting members (32) arranged in the shell (31) and a heating assembly (33) connected with the heat-conducting members (32) outside the shell (31), the heating assembly (33) being used for providing a heat source to the heat-conducting members (32). The heat-conducting members (32) are arranged on the upper surface and the lower surface of the inner wall of the shell (31) in a staggered mode, adjacent heat-conducting members (32) are arranged in a spaced mode, the length of the heat-conducting members (32) is smaller than the thickness of the shell (31), and the heat-conducting members (32) are integrally connected with a plurality of heat-conducting pipes (331).

2. The heat exchanger internal piping drying device according to claim 1, characterized by: The heat-conducting members (32) are arranged in two, and the heat-conducting members (32) are spiral heat-conducting pipes (332).

3. The heat exchanger internal piping drying device according to claim 2, characterized by: The flow divider (4) comprises a primary flow divider (41) and a secondary flow divider (42), the primary flow divider (41) being connected with the heater (3) to divide the high-temperature high-pressure hot air into at least two air paths, one end of the secondary flow divider (42) being connected with the primary flow divider (41) and the other end being connected with the inlet of the heat exchanger (1), and the secondary flow divider (42) being used for dividing the at least two air paths into a plurality of air paths.

4. The heat exchanger internal piping drying device according to claim 2, characterized by: The secondary flow divider (42) is provided with a first flow dividing area (421) and a second flow dividing area (422), and the first flow dividing area (421) and the second flow dividing area (422) are respectively arranged in communication with the primary flow divider (41) through hot air pipes (43).

5. The heat exchanger internal tube drying device according to claim 1, characterized in that: The first flow dividing area (421) and the second flow dividing area (422) are both provided with a plurality of connecting ports (4221), and the connecting ports (4221) are connected with hoses (44).

6. The heat exchanger internal tube drying device according to claim 5, characterized in that: Ball valves (45) are arranged between the hoses (44) and the connecting ports (4221).

7. The heat exchanger internal tube drying device according to claim 6, characterized in that: The high-temperature high-pressure hot air generator further comprises an air filter (5) arranged in communication with the high-pressure fan (2), the air filter (5) is provided with a backflow pipe (6), and the backflow pipe (6) is connected with the outlet of the heat exchanger (1).

8. The heat exchanger internal tube drying device according to claim 7, characterized in that: A temperature and humidity sensor (7) is arranged at the outlet of the heat exchanger (1).

9. The heat exchanger internal tube drying device according to claim 1, characterized in that: ​ 10. The heat exchanger internal tube drying device according to claim 1, characterized in that: ​

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