Anti-scaling and anti-blocking heat exchanger

Abstract

An anti-scaling and anti-blocking heat exchanger comprises a heat exchanger shell 1, a heat exchanger internal vibration heat exchange component 2, an ultrasonic descaling device 3 and a descaling control system 4. The descaling control system 4 comprises a control host, an ultrasonic descaling device 3, a vibrator 7 and a material fluctuation frequency detection sensor 8, the ultrasonic descaling device 3, the vibrator 7 and the material fluctuation frequency detection sensor 8 are electrically connected with the control host and are processed and analyzed by the control host, and then the working frequency of the ultrasonic descaling device 3 and the vibration frequency 7 of the vibrator are dynamically adjusted. And good on-line anti-scaling, anti-coking and anti-blocking effects can be achieved.

Description

Technical Field

[0001] This utility model relates to a heat exchanger, which is mainly used in the chemical and environmental protection industries for heat exchange of materials with many impurities, easy sticking, easy coking, and easy scaling. Background Technology

[0002] A heat exchanger is a device that transfers some of the heat from a hot fluid to a cold fluid; it is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food, and many other industrial production processes. In production, heat exchangers can be used as heaters, coolers, condensers, evaporators, and reboilers, and are widely used.

[0003] Scaling, coking, and clogging of heat exchangers are major challenges in the field, particularly in the petrochemical and municipal environmental protection industries, where materials with high impurities, a tendency to stick, coke, and scale are prone to forming fouling. This is especially true for slurries. Mild cases result in a significant decrease in heat exchange efficiency and a sharp increase in operating costs; severe cases lead to heat exchanger blockage, system shutdowns, frequent cleaning, short operating cycles, and high maintenance costs. For example, in petroleum coking, chemical and plastic raw material processing, and environmental waste (kitchen waste, food waste, sludge slurry) treatment, heating and heat exchange equipment experiences a rapid decline in heat exchange efficiency. To maintain production, shutdowns for cleaning are required for 3-6 months at most, and as short as one month. Utility Model Content

[0004] The purpose of this invention is to address the problems of coking, scaling, and clogging in heat exchanger equipment by proposing an anti-scaling and anti-clogging heat exchanger that achieves online anti-scaling, anti-coking, and anti-clogging effects.

[0005] The technical solution used in this utility model is:

[0006] A heat exchanger for preventing scaling and clogging includes a heat exchanger shell 1, an internal vibrating heat exchange component 2, an ultrasonic descaling device 3, and a descaling control system 4; the heat exchanger shell 1 and the internal vibrating heat exchange component 2 are connected by a flange; the ultrasonic descaling device 3 is installed on the outer wall of the heat exchanger shell 1.

[0007] The internal vibration heat exchange component 2 of the heat exchanger includes: a heat exchange elastic coil 5, an elastic pressure-resistant vibrating tube 6, a vibrator 7, a material fluctuation frequency detection sensor 8, a cantilever connecting bracket 9, and a flange plate 10; the tube-side inlet 12 and tube-side outlet 13 of the heat exchange elastic coil 5 and the elastic pressure-resistant vibrating tube 6 are welded and fixed to the flange plate 10; the heat exchange elastic coil 5 is locked, supported, and conducts vibration to the elastic pressure-resistant vibrating tube 6 through the cantilever connecting bracket 9; the material fluctuation frequency detection sensor 8 is fixedly installed on the outer wall of the elastic pressure-resistant vibrating tube 6, and the connecting wire is pulled from inside the elastic pressure-resistant vibrating tube 6, and after coming out of the flange plate 10, it is connected to the descaling control system 4; the vibrator 7 is fixed outside the flange plate 10, and the vibration head is in contact with the bottom of the elastic pressure-resistant vibrating tube 6.

[0008] The height of the heat exchanger flexible coil 5 is less than twice the diameter of the heat exchanger shell 1 by the distance between the inlet and outlet. The distance between the outer wall of the heat exchanger flexible coil 5 and the inner diameter of the heat exchanger shell 1 is 10~15mm.

[0009] The extension or retraction of the vibrating head of the vibrator 7 is 1 to 3% of the total height of the heat exchange elastic coil 5.

[0010] The cantilever connecting bracket 9 has an installation spacing of 3 to 5 times the diameter of the heat exchange elastic coil 5.

[0011] The material fluctuation frequency detection sensor 8 shall be installed in no fewer than 3 units, and the installation position shall be between ±100mm of the vertical midpoint distance between the ultrasonic descaling device 3 and the cantilever connecting bracket 9.

[0012] The total expansion and contraction of the elastic pressure-resistant vibrating tube 6 is 2 to 3 times the maximum expansion and contraction of the vibrating head of the vibrator 7.

[0013] The descaling control system 4 includes a control host, an ultrasonic descaling device 3, a vibrator 7, and a material fluctuation frequency detection sensor 8, all electrically connected to the control host. The system collects material fluctuation data in real time via the material fluctuation frequency detection sensor 8, which is then processed and analyzed by the control host. This allows for dynamic adjustment of the operating frequency of the ultrasonic descaling device 3 (preferably 20-35 kHz) and the vibration frequency of the vibrator 7 (preferably 30-60 Hz), thereby maintaining optimal anti-scaling and descaling performance of the heat exchanger.

[0014] The heat exchange elastic coil 5, while vibrating and fluctuating with materials, utilizes its own elasticity to increase the vibration effect, greatly enhancing the disturbance range relative to ultrasound; and the elasticity changes the material flow cross-sectional area, achieving a good effect of preventing sedimentation and material blockage.

[0015] The above-described utility model enables the heat exchanger to achieve a resonance effect through ultrasonic waves and elastic vibrations under the control of the descaling control system 4, which can maximize the effects of preventing scaling, coking, and clogging, while reducing the frequency of operation, saving costs, and improving the operational stability of the equipment. Attached Figure Description

[0016] Figure 1 This is the main equipment drawing of this utility model.

[0017] Figure 2 yes Figure 1 A sectional view.

[0018] Figure 3 This is a diagram of the internal vibration heat exchange components of the 2-heat exchanger. Detailed Implementation

[0019] This utility model discloses an anti-scaling and anti-clogging heat exchanger, the structure of which is as follows: Figure 1-3 As shown: It includes a heat exchanger shell 1, an internal vibrating heat exchange component 2, an ultrasonic descaling device 3, and a descaling control system 4; the internal vibrating heat exchange component 2 includes: a heat exchange elastic coil 5, an elastic pressure-resistant vibrating tube 6, a vibrator 7, a material fluctuation frequency detection sensor 8, a cantilever connecting bracket 9, and a flange plate 10; the descaling control system 4 includes: the generator and switch of the ultrasonic descaling device 3, the switch of the vibrator 7, the feedback receiving host of the material fluctuation frequency detection sensor 8, and the control host; shell-side outlet 11, shell-side inlet 12, tube-side inlet 13, and tube-side outlet 14.

[0020] Material 1 enters from shell-side inlet 12 and exits from shell-side outlet 11; material 2 enters from tube-side inlet 13 and exits from tube-side outlet 14; the descaling control system 4 continuously or intermittently starts the ultrasonic descaling device 3 and vibrator 7; under the action of the ultrasonic descaling device 3, the material undergoes high-frequency fluctuations, forming a cavitation effect to prevent scaling and coking; the vibrator 7 vibrates the elastic pressure-resistant vibrating tube 6, causing it to repeatedly extend and retract, and transmits the vibration to the heat exchange elastic coil 5 through the cantilever connecting bracket 9. The heat exchange elastic coil 5 also extends and retracts, resonating with the fluctuations caused by the ultrasonic descaling device 3, intensifying the material fluctuations while continuously elastically changing the relative position of the coil, so that the material flow area changes accordingly, preventing material deposition, jamming, blockage and coking, and strengthening the material disturbance under the cavitation effect of the ultrasonic descaling device 3, thus improving the heat exchanger efficiency.

[0021] Since the heat exchanger flexible coil 5 is an elastic tube, it will also cause a certain swaying effect when it expands and contracts, which will enhance the intensity and range of vibration.

[0022] The descaling control system 4 collects data from the material fluctuation frequency detection sensor 8, adjusts the frequency of the ultrasonic descaling generator 3 and the vibration frequency of the vibrator 7, and controls the heat exchanger to maintain the best operating effect.

[0023] In this case, the inlet and outlet of the heat exchanger are selected first, but the inlet and outlet can be changed as long as the heat exchange and circulation effects are met.

Claims

1. A fouling and plugging resistant heat exchanger characterized by The heat exchanger comprises a heat exchanger shell (1), a heat exchanger internal vibration heat exchange component (2), an ultrasonic cleaner (3), and a cleaning control system (4). The heat exchanger internal vibration heat exchange component (2) comprises a heat exchange elastic coil pipe (5), an elastic pressure-resistant vibration pipe (6), a vibrator (7), a material fluctuation frequency detection sensor (8), a cantilever connecting support (9), and a flange plate (10). The pipe passage inlet (12) and the pipe passage outlet (13) of the heat exchange elastic coil pipe (5) and the elastic pressure-resistant vibration pipe (6) are welded and fixed on the flange plate (10). The heat exchange elastic coil pipe (5) is locked, supported, and vibrated by the elastic pressure-resistant vibration pipe (6) through the cantilever connecting support (9). The material fluctuation frequency detection sensor (8) is fixedly installed on the outer wall of the elastic pressure-resistant vibration pipe (6), and the connecting wire is pulled from the inside of the elastic pressure-resistant vibration pipe (6) and connected with the cleaning control system (4) after coming out of the flange plate (10). The vibrator (7) is fixed on the outside of the flange plate (10), and the vibration head is in contact with the bottom of the elastic pressure-resistant vibration pipe (6).

2. A fouling and blockage resistant heat exchanger according to claim 1, wherein The height of the heat exchange elastic coil pipe (5) is 2 times less than the distance between the inlet and outlet of the heat exchanger shell (1) and 2 times the diameter of the heat exchanger shell (1). The distance between the outer wall and the inner diameter of the heat exchanger shell (1) is 10-15 mm.

3. A fouling and blockage resistant heat exchanger according to claim 1, wherein The telescopic amount of the vibration head of the vibrator (7) is 1-3% of the total height of the heat exchange elastic coil pipe (5).

4. A fouling and blockage resistant heat exchanger according to claim 1, wherein The installation interval of the cantilever connecting support (9) is 3-5 times the diameter of the heat exchange elastic coil pipe (5).

5. A fouling and plugging resistant heat exchanger according to claim 1, wherein The installation number of the material fluctuation frequency detection sensor (8) is not less than 3, and the installation position is between ±100 mm of the vertical middle distance between the ultrasonic cleaner (3) and the cantilever connecting support (9).

6. A fouling and plugging resistant heat exchanger according to claim 1, wherein The total telescopic amount of the elastic pressure-resistant vibration pipe (6) is 2-3 times the maximum telescopic amount of the vibration head of the vibrator (7).

7. A fouling and plugging resistant heat exchanger according to claim 1 wherein, The cleaning control system (4) comprises a control host, an ultrasonic cleaner (3), a vibrator (7), and a material fluctuation frequency detection sensor (8) electrically connected with the control host. The generator frequency of the ultrasonic cleaner (3) is 20-35 kHz, and the vibration frequency of the vibrator (7) is 30-60 Hz.

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