Scale inhibition device of circulating water system

Abstract

The utility model relates to the technical field of circulating water scale inhibition equipment, in particular to a scale inhibition device of a circulating water system. Comprising a feed liquid pool, a first delivery pump and a plurality of circulating water treaters which are sequentially connected, second delivery pumps are arranged among the circulating water treaters, the inner walls of the circulating water treaters are made of metal materials, the inner walls of the circulating water treaters comprise first electrodes and second electrodes, and isolation belts are arranged between the first electrodes and the second electrodes. The first electrode and the second electrode are connected with a controller and a power supply, the first electrode and the second electrode are paired cathodes and anodes, and the polarities of the first electrode and the second electrode can be switched. The polarity of the first electrode and the polarity of the second electrode can be switched through the controller, the cathode and the anode on the inner wall of the circulating water treater are changed, scale is prevented from being accumulated in the cathode area for a long time, the scale inhibition efficiency is improved, and meanwhile the service life of the circulating water treater is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of circulating water scale inhibition equipment, in particular to a circulating water system scale inhibition device. Background Art

[0002] At present, circulating cooling water is widely used in many industrial production processes. Since circulating cooling water contains high concentrations of hardness ions, it leads to the formation of sediments. Such sediments are deposited or accumulated on the surface of various equipment, which is scaling. Common scales include CaCO3, MgCO3, CaSO4, BaSO4, and SrSO4, among which CaCO3 scale is the most common and has the greatest harm. Scaling can reduce thermal efficiency, block pipelines, accelerate local corrosion under scale, reduce service life, and shut down equipment. Therefore, solving the scaling problem of circulating cooling water has been a long-term concern of the water treatment industry.

[0003] Descaling methods are mainly divided into chemical methods and physical methods. Among them, chemical methods include ion exchange softening method, lime softening method, and scale inhibitor method. Physical methods include ultrasonic descaling technology, magnetization treatment, and electrochemical treatment technology. Chemical methods are easy to operate and save manpower and material resources, but chemical methods require the addition of chemical reagents, which causes secondary pollution to the environment and makes the water body prone to eutrophication. At the same time, a large amount of reagents need to be added during actual application, which increases costs. Physical methods often use electrochemical treatment technology, but scale deposition on the cathode surface will cause the electrolysis efficiency to decrease. In order to solve the problem of cathode deactivation, descaling technology is very important for electrochemical scale inhibition; the mechanical scraping method is simple to descale the cathode surface, but the mechanical scraping method requires the installation of a scraper in the device, which increases the distance between the anode and cathode, resulting in reduced scale inhibition efficiency and increased energy consumption. At the same time, since the scraper is mostly in direct contact with the box body, long-term contact can easily cause wear of the box body. Therefore, a new scale inhibition device for circulating water systems is needed. Utility Model Content

[0004] The utility model aims to provide a scale-inhibiting device for a circulating water system, which can improve the scale-inhibiting effect of the circulating water system, prevent scale from being deposited on the inner wall of a processor, and ensure the electrolysis efficiency.

[0005] The utility model provides a scale prevention device for a circulating water system, comprising a slurry pool, a first delivery pump and a plurality of circulating water processors which are connected in sequence, a second delivery pump being arranged between the circulating water processors, an inner wall of the circulating water processor being made of metal, the inner wall of the circulating water processor comprising a first electrode and a second electrode, an isolation zone being arranged between the first electrode and the second electrode, the first electrode and the second electrode being connected to a controller and a power supply, the first electrode and the second electrode being a pair of anode and cathode, and the polarity of the first electrode and the second electrode being switchable.

[0006] Preferably, the controller is used to switch the connection circuits between the first electrode and the second electrode and the positive and negative electrodes of the power supply.

[0007] The connection circuit includes a first circuit and a second circuit. In the first circuit, the first electrode is connected to the positive pole of the power supply, and the second electrode is connected to the negative pole of the power supply. In the second circuit, the first electrode is connected to the negative pole of the power supply, and the second electrode is connected to the positive pole of the power supply.

[0008] Preferably, current sensors are provided on both the first loop and the second loop, and the current sensors are electrically connected to the controller.

[0009] Preferably, the isolation zone is made of insulating material.

[0010] Preferably, the first electrode and the second electrode occupy the same area of ​​the inner wall of the circulating water treatment device.

[0011] Preferably, a liquid inlet is provided on the upper part of the side wall of the circulating water processor, the liquid tank and the first delivery pump are connected to the liquid inlet through a pipeline, and a water outlet is provided at the top center of the circulating water processor, and the water outlet is connected to the liquid inlet of the next circulating water processor through a pipeline.

[0012] Preferably, the liquid inlet is fed along a tangent direction of a side wall of the circulating water treatment device.

[0013] Preferably, the circulating water processors are all conical cylinder structures with a large upper end and a small lower end.

[0014] Preferably, a sewage outlet is provided at the bottom center of each of the circulating water treatment devices, and each of the sewage outlets is connected to a scale collection device through a pipeline.

[0015] Preferably, a regulating valve is provided between the sewage outlet and the scale collecting device.

[0016] Beneficial effects:

[0017] The utility model can switch the polarity of the first electrode and the second electrode through a controller, change the cathode and anode of the inner wall of the circulating water processor, avoid the long-term accumulation of scale in the cathode area affecting the circulating water treatment, improve the scale inhibition efficiency, and extend the service life of the circulating water processor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the top cross-sectional structure of the circulating water treatment device of the utility model.

[0021] Description of reference numerals:

[0022] 1-liquid pool, 2-first delivery pump, 3-circulating water treatment device, 301-first electrode, 302-second electrode, 303-isolation zone, 4-second delivery pump, 5-drainage outlet, 6-regulating valve, 7-scale collection device, 8-water outlet. DETAILED DESCRIPTION

[0023] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Example 1

[0027] like Figure 1-2 As shown, a scale prevention device for a circulating water system comprises a liquid pool 1, a first delivery pump 2 and a plurality of circulating water processors 3 connected in sequence, a liquid inlet is provided at the upper part of the side wall of the circulating water processor 3, and the liquid inlet is in the tangent direction of the side wall of the circulating water processor 3. The liquid pool 1 and the first delivery pump 2 are connected to the liquid inlet through a pipeline, and a water outlet 8 is provided at the top center of the circulating water processor 3, and the water outlet 8 is connected to the liquid inlet of the next circulating water processor 3 through a pipeline, and after being processed by the circulating water processor 3 for multiple times, it is ensured that the circulating water is fully descaled.

[0028] A second delivery pump 4 is provided between the circulating water treatment devices 3. The inner wall of the circulating water treatment device 3 is made of metal. The inner wall of the circulating water treatment device 3 includes a first electrode 301 and a second electrode 302. An isolation belt 303 is provided between the first electrode 301 and the second electrode 302. The isolation belt 303 is made of insulating material, preferably ceramic or rubber material, to avoid mutual influence between the first electrode 301 and the second electrode 302. The first electrode 301 and the second electrode 302 are paired anodes and cathodes, and the electrodes can be switched to switch between cathode function and anode function to avoid excessive precipitation in the cathode area after long-term operation. The first electrode 301 and the second electrode 302 are connected to a power supply and a controller. The power supply is a DC power supply. The controller is used to switch the connection circuit between the first electrode 301 and the second electrode 302 and the positive and negative electrodes of the power supply; that is, to switch the polarity of the first electrode 301 and the second electrode 302.

[0029] The connection circuit includes a first circuit and a second circuit. In the first circuit, the first electrode 301 is connected to the positive pole of the power supply, and the second electrode 302 is connected to the negative pole of the power supply; in the second circuit, the first electrode 301 is connected to the negative pole of the power supply, and the second electrode 302 is connected to the positive pole of the power supply. When the circulating water treatment device 3 is working, only one circuit of the first circuit and the second circuit is connected. The controller controls the switching connection circuit to adopt the common connection method of switching the power supply electrode, and the specific connection is not repeated here.

[0030] Current sensors are provided on both the first circuit and the second circuit, and the current sensors are electrically connected to the controller. The controller can judge the scale accumulation in the cathode area according to the current change, and then switch the connection circuit. The first electrode 301 and the second electrode 302 occupy the same area of ​​the inner wall of the circulating water treatment device 3. The inner wall of the circulating water treatment device 3 except the isolation zone 303 is all cathode and anode, and the contact area with the circulating water is large, which is conducive to improving the descaling efficiency.

[0031] The circulating water treatment device 3 is a tapered cylindrical structure with a large upper end and a small lower end. The liquid inlet is in the tangent direction of the side wall of the circulating water treatment device 3. After the water enters the circulating water treatment device 3, it spirals down along the inner wall, and the flow rate increases, which makes it easy to separate the water from large particles. A sewage outlet 5 is provided at the bottom center of the circulating water treatment device 3. The impurities inside the circulating water treatment device 3 are discharged through the sewage outlet 5. The sewage outlet 5 is connected to the scale collection device 7 through a pipeline. A regulating valve 6 is provided between the sewage outlet 5 and the scale collection device 7. The regulating valve 6 is opened regularly to clean the scale deposited at the bottom of the circulating water treatment device 3.

[0032] Working process:

[0033] The water to be treated in the liquid pool 1 is transported to the liquid inlet of the circulating water treatment device 3 by the first delivery pump 2. The water spirally descends along the inner wall of the circulating water treatment device 3, and the flow rate increases, which makes it easy to separate the water from the large particles.

[0034] The controller is used to connect the first circuit, and the second circuit is disconnected. The first electrode 301 is the anode, and the second electrode 302 is the cathode. Water is electrolyzed under the action of the current, and calcium carbonate and magnesium hydroxide precipitation are generated in the cathode area and attached to the cathode area, resulting in a decrease in current.

[0035] When the current sensor detects a value lower than 40% of the initial current, the controller receives a signal to switch the connection circuit. At this time, the first circuit is disconnected and the second circuit is connected. The first electrode 301 becomes a cathode and the second electrode 302 becomes an anode. The anode electrolyzes water to produce O2 and H + , forming an acidic environment on the anode surface. + It accumulates continuously on the anode surface, and the pH value of the electrode surface gradually decreases, causing the scale layer near the anode surface to dissolve first, and then the outer scale layer will fall off one after another due to insufficient adhesion;

[0036] The scale spirals down with the water and falls to the bottom of the circulating water processor 3 under the action of centrifugal force and gravity. The regulating valve 6 is opened, and the scale falls into the scale collecting device 7, so that the scale precipitation in the circulating water processor 3 can be cleaned.

[0037] The treated water flows out from the water outlet 8 at the top of the circulating water processor 3 and can enter the next circulating water processor 3 for further treatment to ensure sufficient treatment.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A scale prevention device for a circulating water system, characterized in that: It includes a liquid pool, a first delivery pump and several circulating water processors connected in sequence, a second delivery pump is arranged between the circulating water processors, the inner wall of the circulating water processor is made of metal, the inner wall of the circulating water processor includes a first electrode and a second electrode, an isolation zone is arranged between the first electrode and the second electrode, the first electrode and the second electrode are connected to a controller and a power supply, the first electrode and the second electrode are a pair of anode and cathode, and the polarity of the first electrode and the second electrode can be switched.

2. The anti-scaling device for a circulating water system according to claim 1, characterized in that: The controller is used to switch the connection circuits between the first electrode and the second electrode and the positive and negative electrodes of the power supply. The connection circuit includes a first circuit and a second circuit. In the first circuit, the first electrode is connected to the positive pole of the power supply, and the second electrode is connected to the negative pole of the power supply. In the second circuit, the first electrode is connected to the negative pole of the power supply, and the second electrode is connected to the positive pole of the power supply.

3. The anti-scaling device for a circulating water system according to claim 2, characterized in that: The first loop and the second loop are both provided with current sensors, and the current sensors are electrically connected to the controller.

4. The anti-scaling device for a circulating water system according to claim 1, characterized in that: The isolation belt is made of insulating material.

5. The anti-scaling device for a circulating water system according to claim 1, characterized in that: The first electrode and the second electrode occupy the same area of ​​the inner wall of the circulating water treatment device.

6. The anti-scaling device for a circulating water system according to claim 1, characterized in that: A liquid inlet is provided on the upper part of the side wall of the circulating water processor, the liquid tank and the first delivery pump are connected to the liquid inlet through a pipeline, and a water outlet is provided at the top center of the circulating water processor, and the water outlet is connected to the liquid inlet of the next circulating water processor through a pipeline.

7. The anti-scaling device for a circulating water system according to claim 6, characterized in that: The liquid inlet inlets liquid along the tangent direction of the side wall of the circulating water treatment device.

8. The anti-scaling device for a circulating water system according to claim 1, characterized in that: The circulating water processors are all of a conical cylinder structure with a large upper end and a small lower end.

9. The anti-scaling device for a circulating water system according to claim 8, characterized in that: A sewage outlet is provided at the bottom center of the circulating water treatment device, and the sewage outlet is connected to a scale collecting device through a pipeline.

10. The anti-scaling device for a circulating water system according to claim 9, characterized in that: A regulating valve is provided between the sewage outlet and the dirt collecting device.

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