Automatic drying equipment for heat exchange tubes

Abstract

The utility model discloses a kind of automatic drying equipment of heat exchange pipe, comprising: drying room, multiple groups of drying trolley are arranged in drying room interior, heat exchange pipe is placed in parallel on drying trolley;Heater and exhaust fan are symmetrically arranged in the top of drying room by pipeline, humidifier is arranged in the middle of drying room by pipeline.The utility model, air outlet pipe and return air duct are extended downward along the side wall of drying room from the top of drying room to form air circulation flow path, realize the uniform circulation temperature control of drying room interior, accelerate the temperature rise solidification of heat exchange pipe;The air of drying room is humidified by humidifier and humidification nozzle, effectively solve the problem that product humidity difference appears dry crack due to the surface of heat exchange pipe rapid dehydration and internal humidity retention;Drying trolley is arranged in the interior of drying room as stripping device, the arrangement inclination angle between adjacent placing rack is 15 °, effectively solve the problem that heat exchange pipe appears curling.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange tube technology, specifically to an automatic heat exchange tube drying device. Background Technology

[0002] Silicon carbide heat exchange tubes are high-performance heat exchange equipment components with excellent high-temperature resistance. They can maintain stable physical and chemical properties in high-temperature environments and withstand high thermal stress. Their high thermal conductivity enables them to transfer heat quickly and effectively, greatly improving heat exchange efficiency. At the same time, they also have good corrosion resistance and wear resistance, resisting the erosion of various corrosive media such as acids and alkalis. They have a long service life and can adapt to a variety of complex working conditions, making them widely used in chemical, metallurgical, and power industries.

[0003] In industrial production, when silicon carbide heat exchange tubes are conventionally dried in an oven, this intermittent batch operation mode has a limited processing capacity per batch. In addition, there is a temperature gradient inside the oven, resulting in uneven heating of different parts of the tubes. The rapid dehydration of the heat pipe surface while the internal moisture is retained leads to the phenomenon of cracking due to the difference in product humidity. This causes the key parameters such as the diameter and straightness of the heat exchange tubes to deviate from the standard, thereby affecting their installation compatibility and heat exchange performance, and increasing the cost of subsequent processing and quality inspection. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic drying device for heat exchange tubes in order to solve the above problems.

[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including:

[0006] The drying room is equipped with multiple sets of drying trolleys, and heat exchange tubes are placed in parallel on the drying trolleys.

[0007] The top of the drying chamber is symmetrically equipped with heaters and exhaust fans via pipes. The heaters and exhaust fans are used to heat the cold air inside the drying chamber.

[0008] A humidifier is installed in the middle of the drying room via pipes, and the humidifier is used to humidify the cold air inside the drying room.

[0009] The drying chamber is symmetrically equipped with air outlet pipes on both sides, and the air outlet pipes are connected to the return air pipes.

[0010] As a further description of the above technical solution, the air outlet pipe is connected to the heater and the exhaust fan through the return air pipe.

[0011] As a further description of the above technical solution, the return air inlets at the ends of the return air duct are symmetrically arranged facing each other.

[0012] As a further description of the above technical solution, the heater is installed on the duct away from the return air inlet, and the exhaust fan is installed on the duct near the return air inlet.

[0013] As a further description of the above technical solution, the air outlet pipe and the air return pipe extend downward from the top of the drying chamber along the side wall of the drying chamber to form an air circulation path.

[0014] As a further description of the above technical solution, the drying chamber is provided with a humidifying spray pipe, which is connected to a humidifier.

[0015] As a further description of the above technical solution, the drying trolley includes a support frame, on which multiple sets of placement racks are arranged equidistantly and parallelly.

[0016] As a further description of the above technical solution, the top end face of the placement rack is provided with placement grooves at equal intervals, and the placement grooves are used to support the heat exchange tubes.

[0017] As a further description of the above technical solution, the cross-section of the placement slot is an isosceles triangle, and the arrangement inclination angle between adjacent placement racks is 15°.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. In this utility model, the air outlet pipe and the return air pipe extend downward from the top of the drying chamber along the side wall of the drying chamber to form an air circulation path. The cold air in the drying chamber is drawn from the central top return air inlet to the heater by the exhaust fan. The heat generated by the heater is carried into the bottom of the drying chamber by the air outlet pipe. The heated air returns from the bottom to the return air inlet in the center of the chamber, realizing uniform circulation and temperature control inside the drying chamber and accelerating the heating and curing of the heat exchange tube.

[0020] 2. This utility model humidifies the air in the drying room by using a humidifier and humidifying spray pipe, which effectively solves the problem of product cracking caused by rapid dehydration of the heat exchange tube surface and retention of internal humidity.

[0021] 3. In this utility model, a drying trolley is set up inside the drying room as a de-molding device, and the angle of inclination between adjacent placement racks is 15°, which effectively solves the problem of heat exchange tube curling.

[0022] To more clearly illustrate the structural features and functions of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the automatic heat exchanger tube drying equipment of this utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the drying cart of this utility model;

[0025] Figure 3 This is a side view of the drying cart of this utility model.

[0026] Figure label:

[0027] 1. Drying room; 2. Drying trolley; 21. Support frame; 22. Placement rack; 23. Placement slot; 3. Heater; 4. Exhaust fan; 5. Humidifier; 6. Air outlet duct; 7. Return air duct; 71. Return air inlet; 8. Humidifying spray pipe. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0029] like Figures 1-3 As shown, in one embodiment, an automatic heat exchanger tube drying device includes a drying chamber 1 for drying the heat exchanger tubes. The outer surface of the drying chamber 1 is covered with a high-temperature resistant stainless steel rock wool board, which provides good heat insulation.

[0030] Furthermore, the drying chamber 1 is equipped with multiple sets of drying trolleys 2, and heat exchange tubes are placed parallel on the drying trolleys 2. The drying trolleys 2 include a support frame 21, and multiple sets of placement racks 22 for placing heat exchange tubes are arranged parallel to each other at equal intervals on the support frame 21.

[0031] Specifically, the top end face of the placement rack 22 is provided with placement grooves 23 at equal intervals, and the cross section of the placement grooves 23 is an isosceles triangle, so that the placement grooves 23 can support the outer wall of the heat exchange tube; in addition, the arrangement angle between adjacent placement racks 22 is 15°, which facilitates the placement and fixing of the heat exchange tube and can effectively solve the problem of heat exchange tube curling.

[0032] Please continue reading. Figures 1-3 In this embodiment, a heater 3 and an exhaust fan 4 are symmetrically arranged on the top of the drying chamber 1 via pipes to heat the cold air inside the drying chamber 1. Air outlet pipes 6 are symmetrically arranged on both sides of the drying chamber 1, and these outlet pipes 6 are connected to return air pipes 7, allowing the outlet pipes 6 to connect with the heater 3 and the exhaust fan 4 via the return air pipes 7.

[0033] For example, the heater 3 is an electric heater 3, which can continuously and stably heat the air in the duct; while the exhaust fan 4 is an axial flow fan, which drives the air in the drying room 1 to circulate through strong suction.

[0034] Furthermore, the heater 3 is installed on the duct away from the return air inlet 71, while the exhaust fan 4 is installed on the duct close to the return air inlet 71, and the return air inlets 71 at the ends of the return air duct 7 are symmetrically arranged facing each other.

[0035] It should be explained in detail that the air outlet duct 6 and the return air duct 7 extend downwards from the top of the drying chamber 1 along the side wall of the drying chamber 1 to form an air circulation path. It can be understood that after the electric heater 3 and the exhaust fan 4 are started, the exhaust fan 4 draws the cold air in the drying chamber 1 from the return air inlet 71 at the top center into the heater 3, while the heat generated by the heater 3 is carried into the bottom of the drying chamber 1 by the air outlet duct 6. The heated air will rise again from the bottom and carry the cold air back into the return air inlet 71 at the top center, so as to achieve uniform circulation and temperature control inside the drying chamber 1 and accelerate the heating and curing of the heat exchange tubes.

[0036] Please continue reading. Figures 1-3 In this embodiment, a humidifier 5 is installed in the middle of the drying chamber 1 via a pipeline to humidify the cold air inside the drying chamber 1. A humidifying spray pipe 8 is provided around the drying chamber 1, and the humidifying spray pipe 8 is connected to the humidifier 5.

[0037] For example, the humidifier 5 is an ultrasonic humidifier, which uses high-frequency oscillation to atomize water, enabling it to quickly blend with the air inside the drying chamber 1, achieving uniform and efficient humidification; and multiple humidity monitoring probes are installed at different heights inside the drying chamber 1 (as prior art). Figure 1 (not shown in the image), so that the humidifier 5 can detect the humidity inside the drying room 1 through the humidity detection probe.

[0038] It is understandable that by humidifying the air in the drying chamber 1 through the humidifier 5 and the humidifying spray pipe 8, the air in the drying chamber 1 can be kept at a certain humidity in the early stage of drying, thereby effectively solving the problem of product cracking caused by rapid dehydration of the heat exchange tube surface and retention of internal humidity.

[0039] It should be explained in detail that heater 3, exhaust fan 4, and humidifier 5 are electrically connected to the control box outside the drying chamber 1 via wires. The heating process parameters (such as the heating temperature of heater 3, the exhaust speed and flow rate of exhaust fan 4, and the spray flow rate of clamps) can be set by the control module (such as a PLC control module) of the control box. Moreover, multiple independent temperature curves can be set according to different stages of the silicon carbide heat exchanger tube drying process: for example, in the early stage of drying, the temperature is slowly preheated at a lower temperature; after entering the main drying stage, the temperature is rapidly increased to a suitable temperature; and near the end, the temperature is gradually reduced to avoid damage to the tube due to sudden temperature changes. In addition, the temperature control can adopt a PID control algorithm, which dynamically adjusts the temperature deviation through the synergistic effect of the three parameters of proportional (P), integral (I), and derivative (D), and strictly controls the temperature fluctuation range within ±0.1 degrees of the return air inlet.

[0040] Working principle: Each set of fans and heaters 3 are symmetrically arranged on the top of the drying chamber 1. Before heating, the exhaust fan 4 is started for a period of time. Then the heater 3 slowly heats according to the set process flow. The humidifier 5 detects the humidity in the chamber through a humidity detection probe and performs ultrasonic spray humidification to ensure that the temperature and humidity in the drying chamber 1 remain constant. This ensures that the heat exchange tube is stably cured and will not crack during the drying process.

[0041] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic heat exchanger tube drying device, characterized in that, include: Drying room (1), the drying room (1) is equipped with multiple sets of drying carts (2), and heat exchange tubes are placed in parallel on the drying carts (2); The top of the drying chamber (1) is symmetrically equipped with heaters (3) and exhaust fans (4) through pipes. The heaters (3) and exhaust fans (4) are used to heat the cold air inside the drying chamber (1). A humidifier (5) is installed in the middle of the drying room (1) through a pipe. The humidifier (5) is used to humidify the cold air in the drying room (1).

2. The automatic heat exchanger tube drying equipment according to claim 1, characterized in that, The drying room (1) is symmetrically provided with air outlet pipes (6) on both sides, and the air outlet pipes (6) are connected to the return air pipes (7).

3. The automatic heat exchanger tube drying equipment according to claim 2, characterized in that, The air outlet pipe (6) is connected to the heater (3) and the exhaust fan (4) through the return air pipe (7).

4. The automatic heat exchanger tube drying equipment according to claim 3, characterized in that, The return air inlets (71) at the ends of the return air duct (7) are symmetrically arranged facing each other.

5. The automatic heat exchanger tube drying equipment according to claim 4, characterized in that, The heater (3) is located on a pipe away from the return air inlet (71), and the exhaust fan (4) is located on a pipe close to the return air inlet (71).

6. The automatic heat exchanger tube drying equipment according to claim 2, characterized in that, The air outlet pipe (6) and the air return pipe (7) extend downward from the top of the drying room (1) along the side wall of the drying room (1) to form an air circulation path.

7. The automatic heat exchanger tube drying equipment according to claim 1, characterized in that, The drying room (1) is provided with a humidifying spray pipe (8), which is connected to the humidifier (5).

8. The automatic heat exchanger tube drying equipment according to claim 1, characterized in that, The drying trolley (2) includes a support frame (21), on which multiple sets of placement racks (22) are arranged parallel to each other at equal intervals.

9. The automatic heat exchanger tube drying equipment according to claim 8, characterized in that, The top end face of the placement rack (22) is provided with placement grooves (23) at equal intervals, and the placement grooves (23) are used to support the heat exchange tubes.

10. The automatic heat exchanger tube drying equipment according to claim 9, characterized in that, The cross-section of the placement slot (23) is an isosceles triangle, and the arrangement inclination angle between adjacent placement racks (22) is 15°.

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