Anti-scale heat exchanger
By installing a magnetizer in the heat exchanger, the magnets are used to magnetize water molecules, breaking down scale into ions. This overcomes the shortcomings of existing physical and chemical descaling methods, achieving efficient and low-cost descaling, reducing water pump energy consumption and cleaning costs, and extending equipment life.
Patent Information
- Application Number
- CN202520228258.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-13
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2035-02-13
AI Technical Summary
Existing physical descaling methods have limited effectiveness in removing scale and may damage equipment, while chemical descaling methods are costly and pollute the environment. There is a need for an efficient, low-cost, and environmentally friendly descaling method.
Installing a magnetizer in the heat exchanger uses magnets to magnetize the cooling medium, which breaks down the chemical solvation layer of scale-forming ions, promotes scale dissolution, and prevents new scale formation.
By magnetizing water molecules, the degree of water polymerization is reduced, the formation of scale ions is destroyed, scale deposition is prevented, water pump energy consumption is reduced, cleaning costs are reduced, and equipment life is extended.
Smart Images
Figure CN223623427U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of heat exchanger equipment, and specifically relates to an anti-fouling heat exchanger. Background Technology
[0002] The reliable operation of large heat exchange equipment in industries such as thermal power, steel, metallurgy, and chemicals relies heavily on reliable cooling water. The primary source of circulating cooling water is groundwater, which is generally hard in northern China. Excessive cooling water hardness can easily cause scale buildup on the heat exchange surfaces of the equipment under high-temperature conditions. Because scale has relatively high thermal resistance, it typically severely reduces heat exchange efficiency, and the reduced flow area in the pipes leads to increased pump energy consumption. If the scale problem in heat exchange equipment is not addressed for a long time, the scale thickness will gradually increase, significantly increasing the likelihood of pipe bursts, system shutdowns, and other accidents. Furthermore, scale buildup also increases the costs associated with water replenishment, drainage, and cleaning of the heat exchange surfaces.
[0003] Currently, scale removal technologies can generally be divided into chemical descaling methods and physical descaling methods. Power plants primarily use chemical and physical methods to treat circulating water. Chemical methods involve adding reagents to the circulating water to remove or destroy scale-forming ions. Compared to physical methods, chemical treatment can clean even the smallest crevices more thoroughly. However, the added chemical reagents are more expensive and can pollute the environment. Furthermore, the reagents used in chemical methods may damage the pipes being treated, affecting their lifespan.
[0004] Therefore, physical descaling methods are receiving increasing attention, but existing physical descaling methods are mostly ultrasonic vibration, high-pressure cleaning, or mechanical cleaning. Ultrasonic cleaning can easily cause stress corrosion due to cold air, while high-pressure cleaning is only effective for soft or loose scale. Mechanical cleaning mainly uses external force to rotate steel wires, reciprocating rubber balls, or nylon brushes, which can easily damage the surface of equipment and pipelines. Utility Model Content
[0005] The technical problem this application aims to solve is to overcome the shortcomings of existing technologies and provide an anti-scaling heat exchanger. This application uses magnets inside a magnetizer to magnetize the cooling medium, mainly water. After magnetization, the surface tension coefficient, pH value, viscosity, and conductivity of the water decrease, thus enabling scale removal, scale prevention, and sterilization.
[0006] The technical solution adopted by this application to solve its existing problems is:
[0007] An anti-fouling heat exchanger includes a heat exchanger body, a magnetizer is provided inside the heat exchange medium inlet of the heat exchanger body, the magnetizer is open at both the upper and lower ends, an inner liner tube is coaxially provided inside the magnetizer, the inner liner tube is spaced apart from the inner wall of the magnetizer, and a magnet is provided in the spaced area.
[0008] Preferably, the magnetizer has an annular groove recessed on its bottom surface, and the inner liner tube has a second retaining edge extending outward from its bottom, which is engaged inside the groove.
[0009] Preferably, the second retaining edge and the retaining groove are detachably connected by fastening bolts.
[0010] Preferably, several magnetizers are disposed inside the support cylinder, which is inserted into the heat exchange medium inlet.
[0011] Preferably, the support cylinder has a plurality of mounting holes inside, and the magnetizer is inserted into the mounting holes.
[0012] Preferably, the magnetizer has a hexagonal head fitted on the outer side of its top, a threaded portion on its outer wall, and a threaded groove on the inner wall of the mounting hole, wherein the threaded portion is threadedly connected to the threaded groove on the inner wall of the mounting hole.
[0013] Preferably, the support cylinder is fitted with an outer sleeve, and a connecting flange is fitted on the top of the outer sleeve. The connecting flange is coaxially connected to the heat exchanger flange outside the heat exchange medium inlet.
[0014] Preferably, the outer diameter of the outer sleeve is the same as the inner diameter of the heat exchange medium inlet of the heat exchanger body, and the outer sleeve is inserted inside the heat exchange medium inlet.
[0015] Preferably, the outer side of the bottom surface of the support cylinder is provided with a first retaining edge, which is engaged in the groove on the bottom surface of the outer sleeve.
[0016] Preferably, the outer diameter of the outer jacket is larger than the inner diameter of the heat exchange medium inlet, and the total cross-sectional area of the inner liner tubes in the magnetizer inside the outer jacket is equal to the cross-sectional area of the heat exchange medium inlet.
[0017] The outer casing is connected to the connecting flange via a flow guide. A reducing pipe is connected through the end of the outer casing away from the heat exchange medium inlet. The inner diameter of the reducing pipe inlet is the same as the inner diameter of the heat exchange medium inlet.
[0018] Compared with the prior art, the beneficial effects of this application are as follows:
[0019] (1) The magnet inside the magnetizer magnetizes the cooling medium, mainly water. After magnetization, the surface tension coefficient, pH value and viscosity of the water increase, and the conductivity decreases, thus it can remove scale, prevent scale and sterilize.
[0020] (2) The anti-scaling module, consisting of an outer tube, a reducing tube, a support cylinder and a magnetizer, can be used to modify existing heat exchange systems. The modification is convenient and the cost is low. Attached Figure Description
[0021] The present application will be further described below with reference to the accompanying drawings and embodiments.
[0022] Figure 1 This is a first structural diagram of an anti-fouling heat exchanger according to this application.
[0023] Figure 2 for Figure 1 The exploded diagram,
[0024] Figure 3 This is a structural diagram of an anti-scaling module in an anti-scaling heat exchanger according to this application.
[0025] Figure 4 for Figure 3 A partial sectional view,
[0026] Figure 5 This is a structural diagram of the support cylinder in the anti-scaling module of this application.
[0027] Figure 6 This is a structural diagram of the magnetizer in the anti-scaling module of this application.
[0028] Figure 7 for Figure 6 A partial sectional view,
[0029] Figure 8 for Figure 6 The exploded diagram,
[0030] Figure 9 This is a second structural diagram of an anti-fouling heat exchanger according to this application.
[0031] Figure 10 for Figure 9 Partial cross-sectional view of the anti-scaling module.
[0032] In the diagram: 1-Support cylinder, 101-Mounting hole, 102-First retaining edge, 2-Magnetizer, 201-Hexagonal head, 202-Threaded part, 203-Slot, 3-Magnet, 4-Inner liner tube, 401-Second retaining edge, 5-Fasting bolt, 6-Outer sleeve, 601-Connecting flange, 602-Flow guide part, 7-Reducing pipe, 8-Heat exchanger body, 801-Heat exchange medium inlet, 802-Heat exchanger flange. Detailed Implementation
[0033] The attached figure shows a preferred embodiment of this anti-fouling heat exchanger. The present application will be further described in detail below with reference to the attached figure.
[0034] Depend on Figures 1 to 10 As shown, an anti-fouling heat exchanger includes a heat exchanger body 8. A magnetizer 2 is provided inside the heat exchange medium inlet 801 of the heat exchanger body 8. The magnetizer 2 is open at both the upper and lower ends. An inner liner tube 4 is coaxially provided inside the magnetizer 2. The inner liner tube 4 is spaced apart from the inner wall of the magnetizer 2. A magnet 3 is provided in the spaced area.
[0035] Magnetizing the cooling medium with magnet 3 helps to prevent scale buildup. The anti-scaling mechanism is as follows:
[0036] Because water molecules are highly polar molecules, the hydrogen bonds in water exist in an equilibrium state at certain temperatures. When water is subjected to a magnetic field, the degree of polymerization of water is reduced, causing the hydrogen bonds between water molecules to twist or elongate, eventually breaking. The physical properties of water treated with a magnetic field undergo many changes, such as alterations in dielectric constant, conductivity, surface tension, viscosity coefficient, and osmotic pressure. According to theoretical principles, charged particles in an aqueous solution undergo helical circular motion under the influence of the Lorentz force when flowing through a magnetic field, with positive and negative ions rotating in opposite directions. This disrupts the physical solvation layer of ions; under sufficient magnetic field strength, the chemical solvation layer will also be destroyed. The main scale-forming ions, Ca2+ and CO32-, are released and directly collide to combine into CaCO3. The increased chance of molecule formation leads to the formation of numerous microcrystals (crystallization centers). These CaCO3 crystals mainly form dispersed small particles in the water. Because the formation and deposition rate of crystallization centers are affected, scale formation on pipe walls is prevented. Magnetization can also increase the number of individual water molecules, improving the water's solubility and promoting the shedding of old scale. At the same time, water molecules can easily penetrate into the tiny gaps in the scale and vaporize and expand in a high-temperature system, making the scale layer loose and easy to break and fall off under the impact of water flow.
[0037] For ease of installation and maintenance, the magnetizer 2 has an annular groove 203 recessed on its bottom surface, and the inner liner tube 4 has a second retaining edge 401 extending outward from its bottom. The second retaining edge 401 is engaged inside the groove 203. The second retaining edge 401 and the groove 203 are detachably connected by fastening bolts 5.
[0038] The assembly process of magnetizer 2 is as follows: first, magnet 3 is inserted into the groove of the inner wall of magnetizer 2, and then the inner liner tube 4 is inserted from bottom to top. The top surface of the inner liner tube 4 abuts against the top surface of the groove of the inner wall of magnetizer 2. At this time, the second locking edge 401 is inserted into the slot 203. Then, the fastening pin 5 is screwed on to fix the inner liner tube 4 to magnetizer 2.
[0039] To prevent water from entering the chamber where the magnet 3 is installed, a sealing rubber gasket is added at the point where the inner liner tube 4 abuts against the magnetizer 2.
[0040] Several magnetizers 2 are disposed inside the support cylinder 1, which is inserted into the heat exchange medium inlet 801. The support cylinder 1 has several mounting holes 101 inside, and the magnetizers 2 are inserted into the mounting holes 101.
[0041] The magnetizer 2 has a hexagonal head 201 fitted on the outer side of its top, and a threaded part 202 on the outer wall of the magnetizer 2. The inner wall of the mounting hole 101 has a threaded groove, and the threaded part 202 is threadedly connected to the threaded groove on the inner wall of the mounting hole 101.
[0042] The support cylinder 1 is fitted with an outer sleeve 6, and the top of the outer sleeve 6 is fitted with a connecting flange 601. The connecting flange 601 is coaxially connected to the heat exchanger flange 802 outside the heat exchange medium inlet 801.
[0043] In this embodiment, the outer sleeve 6 has the following two arrangement forms:
[0044] The first type, by Figures 1 to 3 As shown, the outer diameter of the outer sleeve 6 is the same as the inner diameter of the heat exchange medium inlet 801 of the heat exchanger body 8, and the outer sleeve 6 is inserted into the heat exchange medium inlet 801. A first retaining edge 102 protrudes from the outer side of the bottom surface of the support cylinder 1, and the first retaining edge 102 is engaged in the groove on the bottom surface of the outer sleeve 6.
[0045] The connecting flange 601 is placed on the heat exchanger flange 802. This arrangement can reduce the pipe length and facilitate the modification of the existing heat exchange system.
[0046] The second type, by Figures 9 to 10 As shown, the outer diameter of the outer sleeve 6 is larger than the inner diameter of the heat exchange medium inlet 801, and the total cross-sectional area of the inner liner tube 4 in the magnetizer 2 inside the outer sleeve 6 is equal to the cross-sectional area of the heat exchange medium inlet 801.
[0047] The outer casing 6 is connected to the connecting flange 601 via the flow guide 602. The end of the outer casing 6 opposite to the heat exchange medium inlet 801 is connected to a reducing pipe 7, and the inner diameter of the reducing pipe 7 is the same as the inner diameter of the heat exchange medium inlet 801.
[0048] In this arrangement, the cross-sectional area of the anti-scaling module, consisting of the outer jacket 6, reducer 7, support cylinder 1, and magnetizer 2, is the same as the cross-sectional area of the heat exchange medium inlet 801, ensuring the heat exchange medium flow rate of the heat exchanger body 8. However, this method requires modification of the pipelines in the heat exchange system and is suitable for newly built heat exchange systems.
[0049] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.
Claims
1. An anti-fouling heat exchanger, comprising a heat exchanger body (8), characterized in that: The heat exchanger body (8) has a magnetizer (2) inside the heat exchange medium inlet (801). The magnetizer (2) is open at both the top and bottom. The magnetizer (2) has an inner liner tube (4) coaxially arranged inside. The inner liner tube (4) is spaced apart from the inner wall of the magnetizer (2). A magnet (3) is provided in the spaced area.
2. The anti-fouling heat exchanger according to claim 1, characterized in that: The magnetizer (2) has an annular groove (203) recessed on its bottom surface, and the inner liner tube (4) has a second retaining edge (401) extending outward from its bottom, which is engaged inside the groove (203).
3. The anti-fouling heat exchanger according to claim 2, characterized in that: The second retaining edge (401) and the retaining groove (203) are detachably connected by fastening bolts (5).
4. An anti-fouling heat exchanger according to claim 1, 2, or 3, characterized in that: Several magnetizers (2) are installed inside the support cylinder (1), which is inserted into the heat exchange medium inlet (801).
5. The anti-fouling heat exchanger according to claim 4, characterized in that: The support cylinder (1) has several mounting holes (101) inside, and the magnetizer (2) is inserted into the mounting holes (101).
6. The anti-fouling heat exchanger according to claim 5, characterized in that: The magnetizer (2) is fitted with a hexagonal head (201) on the outer side of its top. The magnetizer (2) has a threaded part (202) on its outer wall. The mounting hole (101) has a threaded groove on its inner wall. The threaded part (202) is threadedly connected to the threaded groove on the inner wall of the mounting hole (101).
7. An anti-fouling heat exchanger according to claim 5 or 6, characterized in that: The support cylinder (1) is fitted with an outer sleeve (6), and a connecting flange (601) is fitted on the top of the outer sleeve (6). The connecting flange (601) is coaxially connected to the heat exchanger flange (802) outside the heat exchange medium inlet (801).
8. The anti-fouling heat exchanger according to claim 7, characterized in that: The outer diameter of the outer sleeve (6) is the same as the inner diameter of the heat exchange medium inlet (801) of the heat exchanger body (8), and the outer sleeve (6) is inserted inside the heat exchange medium inlet (801).
9. The anti-fouling heat exchanger according to claim 8, characterized in that: The support cylinder (1) has a first retaining edge (102) protruding from the outer side of its bottom surface, and the first retaining edge (102) is engaged in the groove on the bottom surface of the outer sleeve (6).
10. An anti-fouling heat exchanger according to claim 7, characterized in that: The outer diameter of the outer sleeve (6) is larger than the inner diameter of the heat exchange medium inlet (801), and the total cross-sectional area of the inner liner tube (4) in the magnetizer (2) inside the outer sleeve (6) is equal to the cross-sectional area of the heat exchange medium inlet (801); The outer tube (6) is connected to the connecting flange (601) through the flow guide (602). The end of the outer tube (6) opposite to the heat exchange medium inlet (801) is connected to a reducing pipe (7). The inner diameter of the reducing pipe (7) is the same as the inner diameter of the heat exchange medium inlet (801).