A heat-supply network heater ultrasonic descaling and scale inhibition system

Abstract

The application discloses a heat network heater ultrasonic descaling and scale inhibition system, and relates to the technical field of ultrasonic descaling and scale inhibition. The system comprises transducers for descaling and scale inhibition, a pulse power supply box connected with the transducers, the transducers are arranged at the front and rear parts of the heat network heater and are perpendicular to the center line of the heat network heater, the transducers are uniformly distributed on the tube plate outer periphery of the cylinder body of the heat network heater, and the pulse power supply box comprises a plurality of pulse power supplies which can drive the plurality of transducers. The system adopts a pure physical mode to realize online descaling and scale inhibition synchronously with the operation of the heat network heater. Compared with the traditional scale inhibition mode and shutdown disassembly cleaning, the system has the outstanding technical advantages of energy saving and emission reduction, cost reduction and efficiency increase, safety and reliability, and reduces the cost of production heat energy, is a new technical means for building an energy-saving power plant, and has a positive effect on building an energy-saving society and implementing the scientific concept of development.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic descaling and scale inhibition technology, and in particular to an ultrasonic descaling and scale inhibition system for a heating network heater. Background Technology

[0002] The heating network heater is a key piece of equipment in the heating network system and one of the main auxiliary equipment in a thermal power plant. Its main function is to use steam extracted from the steam turbine or steam drawn from the boiler (heating medium) to heat the circulating water in the hot water supply system to meet the heating demand.

[0003] Due to factors such as high hardness of source water and discharge control, the hardness of circulating water is extremely high, resulting in severe scaling problems in the heating network heaters. Pipe blockage is common, accompanied by severe under-scale corrosion, which directly leads to a decrease in heat exchange efficiency and seriously affects the economic benefits of the units. In addition, during the peak heating season, the heating network heaters generally have insufficient output, resulting in significant losses in external heat supply operations. The heater leakage rate is high, requiring frequent maintenance and replacement, which causes great waste.

[0004] Therefore, an ultrasonic descaling and scale inhibition system for heating network heaters is designed to improve the above-mentioned problems. Summary of the Invention

[0005] To address the aforementioned problems in the prior art, this invention provides an ultrasonic descaling and scale inhibition system for a heating network heater. This system employs a purely physical method to simultaneously perform online descaling and scale inhibition while the heating network heater is in operation. It is safe, environmentally friendly, easy to use, has good descaling and scale inhibition effects, and offers a reasonable cost-performance ratio.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An ultrasonic descaling and scale inhibition system for a heat network heater includes a transducer for descaling and scale inhibition, and a pulse power supply box connected to the transducer. The transducer is disposed at the front and rear of the heat network heater and perpendicular to the center line of the heat network heater. The transducers are evenly distributed on the outer periphery of the tube sheet on the upper part of the heat network heater cylinder. The pulse power supply box includes multiple pulse power supplies, which can drive multiple transducers.

[0008] As a preferred embodiment of the present invention, the acoustic power of the transducer is 200W.

[0009] As a preferred embodiment of the present invention, the pulse power supply box is installed vertically at a height of 1500mm and the distance between boxes is 100mm.

[0010] As a preferred embodiment of the present invention, the wiring between the pulse power supply and the transducer is soldered according to the corresponding numbers of the aviation connector.

[0011] As a preferred embodiment of the present invention, the length of the connection between the pulse power supply and the transducer is less than 10 meters.

[0012] By adopting the above-described technical solution, the beneficial effects of the present invention compared with the prior art are as follows:

[0013] 1. The present invention provides an ultrasonic descaling and scale inhibition system for a heat network heater, which has a descaling effect. When ultrasonic vibration acts on a liquid, the liquid generates a large number of tiny vacuum bubbles, forming a "cavitation effect." The vacuum bubbles rapidly burst and annihilate, generating a shock wave with extremely high energy in a localized area, which destroys the adsorption of scale deposits on the metal tube bundle. At the same time, ultrasonic vibration causes the metal, scale, and water to vibrate. Due to the different frequency responses among the three, asynchronous vibration occurs between them, forming a shear force, i.e., a "shear effect." The combination of the above two effects causes the scale layer to break up and loosen.

[0014] 2. The ultrasonic descaling and scale inhibition system for a heat network heater of the present invention has a scale inhibition effect. Ultrasonic waves in the liquid medium, through the "cavitation effect," break down some water molecules into H free radicals and OH free radicals, further forming H+ and OH- ions. The OH radicals can form compounds such as CaOH2 and MgOH2 with scale-forming metal cations, thereby increasing the water's ability to dissolve scale-forming ions, improving their solubility, and forming an "activation effect." Ultrasonic oscillation also produces a "superionic condensation" phenomenon, preventing scale-forming ions from adhering to the metal.

[0015] 3. The ultrasonic descaling and scale inhibition system for a heat exchanger heater of the present invention improves the oxidation and corrosion of the heat exchanger. Dissolved oxygen molecules that are released from the fine cracks on the surface of the tube wall are forced out of the cracks under the action of ultrasonic vibration, reducing the accumulation of dissolved oxygen in the water in the cracks on the surface of the tube bundle, reducing corrosion, and extending service life;

[0016] 4. The ultrasonic descaling and scale inhibition system for a heat exchange network heater of the present invention improves heat exchange efficiency. During water flow within the tube bundle, regions with different flow velocities are formed due to the resistance of the tube bundle. A laminar flow layer with slower flow velocity forms near the tube bundle, while a turbulent flow layer with faster flow velocity forms near the center of the tube bundle. When ultrasonic vibration acts on the tube bundle, the water within the tube bundle is driven to vibrate synchronously. This vibration disrupts the formation of each velocity layer, increases the flow velocity of the laminar flow layer near the tube bundle, and enhances the exchange of water between different velocity layers, thereby improving the overall heat exchange efficiency.

[0017] 5. The ultrasonic descaling and scale inhibition system for a heating network heater of the present invention sterilizes and kills algae, purifies water quality, and the "cavitation effect" formed by ultrasonic vibration on the water body will to a certain extent damage the ion channels on the cell membrane of microorganisms, disrupt the metabolism of microorganisms, and lead to the death of microorganisms. To a certain extent, it can inhibit the growth and reproduction of microorganisms and reduce the formation of biomass soft scale;

[0018] 6. The ultrasonic descaling and scale inhibition system for a heating network heater of the present invention uses a purely physical method for descaling and scale inhibition, which is safe, energy-saving and environmentally friendly. The maximum noise of the equipment does not exceed 70 decibels, which is harmless to people and heating network heaters, and does not pollute water bodies and the environment. Attached Figure Description

[0019] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

[0020] Figure 1 This is the front view of an example of the present invention;

[0021] The reference numerals in the accompanying drawings include: transducer 1, heat network heater 2, tube sheet 21. Detailed Implementation

[0022] The technical solutions of various embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. It should be pointed out that all accompanying drawings are exemplary representations. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0026] Reference Figure 1 , Figure 1 This is a front view of an embodiment of the present invention. The present invention provides an ultrasonic descaling and scale inhibition system for a heat network heater, including a transducer 1 for descaling and scale inhibition, and a pulse power supply box (not shown) connected to the transducer 1. The transducer 1 is arranged at the front and rear of the heat network heater 2 and is perpendicular to the center line of the heat network heater 2. The transducers 1 are evenly distributed on the outer periphery of the tube sheet 21 on the cylinder of the heat network heater 2. The acoustic power of the transducer 1 is 200W. The pulse power supply box includes multiple pulse power supplies (not shown). The pulse power supplies can drive multiple transducers 1. The pulse power supply box is installed vertically at a height of 1500mm and the box spacing is 100mm. The wiring between the pulse power supply and the transducer 1 is welded according to the corresponding numbers of the aviation connector. The length of the connection between the pulse power supply and one of the transducers 1 is less than 10 meters.

[0027] The following will refer to Figure 1 The working principle of the present invention will be explained.

[0028] This invention achieves descaling and scale inhibition through cavitation effect, shear effect, activation effect, and super-coagulation phenomenon. The specific technical route of this invention is as follows:

[0029] 1. Develop corresponding equipment configuration plans based on the specific circumstances of the project, organize the equipment numbering and icon information, prepare calculation instructions for descaling and scale inhibition capabilities, and create schematic diagrams of the descaling and scale inhibition system, etc., and communicate all documents with the user.

[0030] 2. After discussing and finalizing all the preliminary documents mentioned in point 1 above, compile and draw up on-site installation diagrams and construction plans.

[0031] 3. The main on-site installation work (construction plan) includes:

[0032] 3.1 Preliminary preparations: Shut down the system and ensure system isolation. The cooperating manufacturer recommends thoroughly cleaning the heat exchange equipment before installing ultrasonic descaling and scale inhibition equipment.

[0033] Erect scaffolding and carry out site cleanup and fencing.

[0034] 3.2 The installation process is as follows:

[0035] 1) At the designated location, grind the weld points on the surface of the heat exchanger to expose the metal. Alignment: Align the waveguide head with the center along the diameter direction, keeping the transducer perpendicular to the centerline of the heat exchanger. Position the bevel for easy welding and wiring. Maintain a 1mm welding distance between the transducer waveguide head and the welding surface to ensure a tight weld. Weld the entire bevel area. The weld should be free of bubbles, pinholes, oxides, etc., and be dense. Because ultrasonic waves have a short wavelength, they cannot pass through bubbles, pinholes, oxides, etc., directly affecting the ultrasonic descaling effect.

[0036] 2) Pulse power supply installation

[0037] Install pulse power supply boxes at the nearest locations at the front and rear ends of the heat exchanger. The pulse power supply boxes should be installed vertically, with the top plane of the box installed at a height of 1500mm and the spacing between boxes 100mm, ensuring a straight and aesthetically pleasing appearance. Install them near the heat exchanger, with the fixing bolts pre-welded in. The selected installation location should meet the following conditions:

[0038] The temperature should be between -25℃ and +50℃.

[0039] The vibration of the machine body is no greater than 0.05 mm.

[0040] No water, steam, oil, or other substances are sprayed onto the chassis and transducer.

[0041] The concentration of ash, powder, and dust on site meets the requirements for the use of electrical equipment.

[0042] It facilitates cable routing, and makes it easier for operators to conduct inspections and for maintenance personnel to carry out maintenance.

[0043] 3) Wiring of the transducer and pulse power supply.

[0044] 4) Frequency and power density adjustment.

[0045] This invention utilizes a novel, purely physical method to simultaneously remove and inhibit scale online during the operation of the heating network heater. Compared to traditional scale prevention methods and shutdown-based disassembly and cleaning, it offers significant technological advantages in energy saving, emission reduction, cost reduction, efficiency improvement, and safety and reliability. Developing an energy-saving and consumption-reducing product is both a societal need and presents a huge business opportunity. Against this backdrop, the application of ultrasonic descaling technology in large-scale heat exchange equipment, such as heating network heaters, has broad market potential. Reducing the cost of producing thermal energy is not only significant technically and economically, but also socially, representing a new technological means for building energy-saving power plants. It plays a positive role in building a conservation-oriented society and implementing the scientific development concept.

[0046] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An ultrasonic descaling and scale inhibition system for a heating network heater, characterized in that, It includes a transducer for descaling and scale inhibition, and a pulse power supply box connected to the transducer. The transducer is arranged at the front and rear of the heat network heater and is perpendicular to the center line of the heat network heater. The transducers are evenly distributed on the outer periphery of the tube sheet on the upper part of the heat network heater cylinder. The pulse power supply box includes multiple pulse power supplies, which can drive multiple transducers.

2. The ultrasonic descaling and scale inhibition system for a heating network heater according to claim 1, characterized in that, The transducer's acoustic power is 200W.

3. The ultrasonic descaling and scale inhibition system for a heating network heater according to claim 1, characterized in that, The pulse power supply box is installed vertically at a height of 1500mm, with a box spacing of 100mm.

4. The ultrasonic descaling and scale inhibition system for a heating network heater according to claim 1, characterized in that, The wiring between the pulse power supply and the transducer is soldered according to the corresponding numbers of the aviation connector.

5. The ultrasonic descaling and scale inhibition system for a heating network heater according to claim 1, characterized in that, The length of the connection between the pulse power supply and the transducer is less than 10 meters.

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