WO2011035715A1

WO2011035715A1 - Iron removal purification device with magnetic field and its application of condensed water and water supply in power plant

Info

Publication number: WO2011035715A1
Application number: PCT/CN2010/077206
Authority: WO
Inventors: 张子楠
Original assignee: Zhang Zinan
Priority date: 2009-09-25
Filing date: 2010-09-21
Publication date: 2011-03-31

Abstract

An iron removal purification device with a magnetic field is provided, and it can be applied to treatment of condensed water and water supply for a power plant. The device is formed by permanent magnetic pipes. The permanent magnetic pipes comprise sleeve tubes, in which several permanent magnets are fixed and sealed with the same poles facing each other. A big magnetic filter net is formed in the device, so that it ensures that the whole filter net is under magnetic field. Furthermore, the device has simple structure, and is easy to implement.

Description

Magnetic field iron removal purifying device and application thereof in power plant condensation 7j and water supply

The present invention relates to a magnetic field iron removal apparatus for separating iron impurities in water, and a specific application of such apparatus in power plant steam turbine condensate and boiler (nuclear power plant steam generator) feed water. Background technique

Boilers in power plants (or steam generators in nuclear power plants) The soda pipes and their associated thermal equipment are made of iron-based materials, which generate a large amount of solid iron corrosion products during operation and become the main water Harmful impurities, these solid iron impurities will deposit on the evaporation surface of the boiler (nuclear power plant steam generator) or other thermal system pipelines, which will affect the heat transfer to the pipe wall and overheat the pipe wall. It will cause corrosion under scale, overheating and corrosion are the main causes of tube explosion accidents in boilers. At the same time, the flow of solid impurities in the steam pipe will cause erosion damage to the pipe wall valves. These solid impurities in the feed water directly affect the boiler (nuclear power plant). The steam generator is safe to operate. Therefore, the power plant attaches great importance to the decontamination of condensate and boiler feed water. However, for technical reasons, there is no iron removal device in the water supply system. Only various forms of chemistry can be set in the condensate system in front of the water supply system. In addition to the "fine treatment" device for iron purification equipment and various types of front-mounted iron removers, here, by trying to improve the quality of condensate purification, the shortage of the purification device in the water supply system is compensated. In these conventional purification apparatuses, all of the filter materials such as resins and fibers are used, and the adsorption and filtration of these substances are used to remove iron impurities in the water. The traditional thermal cycle system of the power plant and the process of removing the iron are: After the steam works in the steam turbine, the steam is condensed into condensed water in the condenser, and the condensed water passes through the condensate pump outside the condenser to increase the pressure, and the condensate Send to the condensate purification and heating device, first enter the chemical de-ironing equipment "fine treatment" to remove the iron from the condensate, "fine treatment" in the traditional power plant thermal system becomes the only iron removal device in the condensate and water supply system Then, the condensed water enters the boiler feed water system through the low-pressure heater and the deaerator deaeration water tank, and the feed water is heated by the boiler to become steam to push the steam turbine to work, and the above-mentioned steam-water thermodynamic cycle process begins. Power Generation It is customary to say that the iron removal system managed by the chemical profession is a chemical iron removal method. It is currently widely used in the world to remove iron, but the disadvantages are:

1. Due to the high cost of resin replacement in the treatment of condensed water, in order to prevent premature contamination, it cannot be put into use when the water quality is poor at the initial stage of the unit startup, thus causing the installation to be cleaned without iron removal. The set condition, so that a large amount of condensed water is discharged, also makes the unit start-up grid-connected power generation time unpredictable.

2. The main purpose of water purification of power plants is to protect the heating surface of boilers (steam generators of nuclear power plants). Therefore, the iron removal purification equipment should theoretically be located in the water supply system closest to the boiler (the steam generator of the nuclear power plant). To the more direct and more effective protection, the traditional iron removal technology uses a polymer material such as resin as the filter material. The temperature of the filter material generally does not exceed 75 °C, so the chemical iron removal method can only be used at lower temperatures. The "fine treatment" is established in the condensate system. The iron removal device performs iron removal and purification on the condensed water, but the iron removal purification device cannot be established in the water supply system with the working temperature above 150 °C, but the condensed ice is "finished," After the device is cleaned, it is further polluted by the low-pressure heater and various hydrophobic pollution, so there is no purification device. The contaminated condensate directly enters the water supply system and enters the boiler. The critical unit requires "fine treatment". The iron content of the condensed water after treatment is less than 5ppb, and the iron content of the feed water is less than l Oppb. On the contrary, it is lower than the standard of condensate, which means that there is no iron removal device in the water supply, and it has to be relaxed. It is a helpless choice. The previous water supply system has not established a de-iron purification device, and the quality requirements for the water supply are completely dependent on The ability of the condensate purification device, the water supply system needs to have its own independent iron removal purification device to ensure the safe operation of the boiler.

In order to remedy the above-mentioned deficiencies of the prior art, the primary object of the present invention is to provide a magnetic field iron removal apparatus for separating iron impurities in water, and the present invention further provides a specific embodiment of such a device in a power plant condensate and feed water. application. Among them, the condensed water magnetic field iron removal device is installed in the steam turbine workshop condenser of the power plant, and the power supply magnetic field iron removal purification device of the power plant is installed in the oxygen removal water tank. According to the ferromagnetic phase suction principle, the iron impurities in the water flowing through are separated, thereby realizing the iron removal purification of water. The magnetic field de-iron purification device is installed in the condenser, and the condensed water is desulfurized at the source for the first time; the magnetic field iron removal purification device is installed in the deaerating water tank, and the boiler is realized for the first time (nuclear power plant) Steam generator) The iron removal of the feed water.

The basic constituent unit constituting the magnetic field iron-removing device of the present invention is a permanent magnet tube, which comprises a sleeve and a plurality of permanent magnets fixed in the sleeve, the sleeve is made of a non-magnetic material, and a plurality of permanent magnets are The length direction of the sleeve is arranged in sequence or arranged in a ring shape along the circumference of the sleeve. The polarity direction of the permanent magnets is the direction of arrangement, and the polarities of the adjacent ends of the adjacent permanent magnets are the same, so that the effective adsorption area of the iron impurities is spread over the sleeve. The circumferential direction and the full length of the surface; the effective adsorption zone of the iron impurities refers to a portion where the magnetic lines of the permanent magnets on the surface of the sleeve are respectively concentrated, and the portions are respectively associated with the permanent magnets The position where the magnetic pole is located corresponds.

The magnetic field iron removal purifying device of the invention is composed of a plurality of permanent magnet tubes through a frame, and the effective adsorption ranges of the permanent magnet tubes for the iron impurities in the water are sequentially connected in space, thereby forming a magnetic field of a plurality of permanent magnet tubes. a combined magnetic field formed by splicing each other; as the ice to be purified flows through the combined magnetic field, iron impurities in the water are adsorbed onto the surface of the permanent magnet tube in the combined magnetic field; the effective adsorption range is that the permanent magnet tube can iron The range in which the impurity is adsorbed onto the surface thereof is a three-dimensional space surrounding the permanent magnet tube.

By arranging a plurality of permanent magnets in the permanent magnet tube and making the adjacent ends of the adjacent permanent magnets have the same polarity, as in the permanent magnet tube, a plurality of permanent magnets whose magnetic fields are independent of each other and do not affect each other are arranged. The use of several such permanent magnet tubes to construct a purification device is equivalent to constructing a large magnetic field filter required by thousands of small magnetic fields that do not affect each other. This structure ensures the magnetic field range. Covering all corners of the entire network, the entire device structure is simple and easy to implement.

When the magnetic field iron removal purifying device of the invention is used for iron removal purification of power plant condensed water, the device may be disposed above the water outlet of the steam turbine condenser hot water well, and according to the water flow direction at the water outlet, through the frame a plurality of permanent magnet tubes are combined into a hollow annular or lower end opening, and a cover shape of a permanent magnet tube is arranged around and at the top; when the water flow in the hot water well flows into the water outlet from the periphery, the water flowing into the water outlet is used by the annular purifying device In the iron removal purification, when the water flow in the hot water well flows into the water outlet from the periphery and the upper portion at the same time, the water flowing into the water outlet is subjected to iron removal purification by the cover-shaped structure purifying device with the cover buckle above the water outlet.

When the magnetic field iron removal purifying device of the invention is used for iron removal purification of a power supply boiler boiler water supply system, the device can be installed in an oxygen removal water tank, and according to the internal flow rate of the oxygen removal water tank and the direction of the water flow, a plurality of pieces are permanently passed through the frame. The magnetic tube assembly is formed into a body grid structure, which is composed of a plurality of horizontally arranged planar units and a plurality of vertically disposed planar units, each of which is composed of a plurality of permanent magnet tubes through a frame. A plurality of horizontally disposed planar units are disposed in parallel with each other, and a plurality of vertically disposed planar units are also disposed in parallel with each other.

For the high temperature environment in the deaerator tank, a permanent magnet that can withstand this high temperature should be used to make the permanent magnet tube. The innovation of the magnetic field iron removal device of the invention lies in:

1. The traditional chemical iron removal method is: using the resin and fiber as the filter material and establishing a separate and dedicated large pressure-bearing equipment to purify the water, and the present invention is a conventional heat equipment condenser with only a single storage water function. Through the magnetic field technology, the well and the deaerating water tank skillfully increase the iron removal function, and realize the iron removal and purification of the condensed water and the feed water by using the condenser and the oxygen removal water tank respectively. The potential of thermal equipment has also created a new way to remove iron from the original thermal equipment of the power plant. The complementary coexistence of the two methods has promoted the improvement of water purification technology in power plants.

1. The condensate removal iron removal device installed in the condenser establishes the only condensate de-ironing device before the steam turbine generator set starts, the chemical “fine treatment” iron removal device is not put into operation, and the condensed water is realized. The source is de-purified, speeding up water purification, reducing water discharge and unit start-up process; it becomes a chemical de-ironing method in the normal operation of the unit, and the front-mounted iron remover of the unit is lightened. The burden of “fine treatment” prolongs the service life and replacement time of the resin, which not only improves the “fine treatment, economical operation, but also contributes to the improvement of the quality of the refined water purification”.

3. The iron removal purification device installed in the deaerator tank, the iron removal purification device was established in the boiler feed water system for the first time, which realized the iron removal purification of the feed water, and ended the history of the power supply system without purification device.

4. The traditional purification method uses resin and fiber as the filter material to filter and adsorb impurities in the water. The resin and fiber need to be regenerated, replaced, and discarded. The cost is high and the environment is also polluted. The device uses the permanent magnetic field to screen out the iron impurities in the water. The use of magnetic energy to remove iron, like the use of wind energy, solar energy to get the benefits of nature, and the magnetic field is a permanent magnet, can be reused and high precision in iron removal, is environmentally friendly, does not consume other energy, water purification technology.

5. The device adopts the submersible design, uses the magnetic field technology to develop the container space, and establishes the invisible iron removing device in the underwater space of the thermal container without occupying the ground of the workshop. This is a very compact power plant. For the steam turbine workshop, the contradiction between the establishment of equipment and the land occupation has been successfully solved, and it is also a typical design of compact layout and land saving.

6. The traditional chemical iron removal purification device needs to use a water pump to provide the power of the water flow in order to overcome the resistance of the filtration device, which consumes electric energy; and the demagnetization magnetic field of the device is selected to be established on the flow path of the water flow flowing from top to bottom. With the water flow there is a potential energy flowing from top to bottom through the magnetic field, the iron removing device does not need to establish a driving water pump; at the same time, the iron removing device installed in the container uses the casing of the original container as the casing, and is no longer The special outer casing structure is provided, and the magnetic component with the iron removing function is mechanically connected with the original heat container member to form a stable iron removing device, which not only saves energy, reduces the cost, but also makes the iron removing system simpler and easy to popularize. DRAWINGS

1 is a schematic view showing a first structural type of a permanent magnet tube used in a magnetic field iron removal purifying apparatus of the present invention; 2 is a schematic view showing a second structure of a permanent magnet tube;

3 is a schematic diagram of a system for applying a magnetic field iron removal purification device to a condenser according to the present invention; FIG. 4 is a schematic view showing a first structural type of the magnetic field iron removal purification device used in the system shown in FIG. A schematic diagram of a rectangular planar unit structure for a purification device;

Figure 6 is a schematic view showing a second structural type of the magnetic field iron removing apparatus used in the system shown in Figure 3; Figure 7 is a schematic view showing a third structural type of the magnetic field removing iron purifying apparatus used in the system shown in Figure 3; 3 is a schematic diagram of a fourth structural type of the magnetic field removing iron purifying device used in the system shown in FIG. 3; FIG. 9 is a schematic view showing a system for applying the magnetic field iron removing and purifying device to the oxygen scavenging water tank according to the present invention; FIG. 10 is an AA view of FIG.

Figure 11 is a left side view of the magnetic field iron removing apparatus shown in Figure 10;

Figure 12 is a top view of the state shown in Figure 11 of the magnetic field iron removal purifying device;

Figure 13 is a schematic diagram of the wavy arrangement of the permanent magnet tube.

In the figure: 1. Sealing plate, 2. Casing, 3. Permanent magnet, 4. Separator, 5. Permanent magnet tube, 6. Condenser, Ί. Hot water well, 8. Condensed water magnetic field iron removal device 9. Condensate pump, 10. Rectangular plane unit, 1 1. Frame, 12. Vertically arranged plane unit, 13. Horizontally arranged plane unit, 14. Oxygen dehydration tank, 15. Feed water pump. detailed description

The invention will now be further described with reference to the accompanying drawings.

As shown in FIG. 2, the permanent magnet tube 5 used in the magnetic field iron removal apparatus of the present invention comprises a sleeve 2 and a sleeve fixedly enclosed with a plurality of permanent magnets 3, and the sleeve 2 is a circular tube, which is made of stainless steel or aluminum alloy. Made of a magnetic material, a plurality of cylindrical permanent magnets 3 are arranged in the longitudinal direction of the sleeve 2, the polar directions of the permanent magnets 3 are arranged in the direction of alignment, and the adjacent ends of the adjacent permanent magnets 3 have the same polarity, thereby forming an edge The N-SS-Liyi SS-匪-SS... S magnetic pole distribution pattern arranged in the longitudinal direction of the sleeve, and the partition plate 4 made of a magnetic conductive material is disposed between the adjacent two permanent magnets 3 in the sleeve 2, The magnetic lines of the permanent magnets 3 at the two ends are guided through the side wall of the sleeve 2 to form a circuit. The two ends of the sleeve 2 are also specially provided with a guide plate 4' made of a magnetically permeable material, and the ends of the sleeve 2 are sealed by a cover plate 1 The gas seal is blocked, and the sealing plate 1 is made of a non-magnetic material. The sealing plate can be fixed to the sleeve 2 by an interference fit, or can be welded and fixed by the argon arc welding and the sleeve 2, and the permanent magnet 3 is required according to the need. AlNiCo, NdFeB

4 cobalt alloy or ferrite and other permanent magnet materials.

Figure 2 shows the first structural version of the permanent magnet tube 5, in addition to this, the permanent magnet tube 5 is also made in Figure 3. In the second type of construction, the permanent magnet 3 is partially annular, and the plurality of permanent magnets 3 are circumferentially arranged in a ring shape matching the inner diameter of the sleeve 2, and the magnetic pole direction of the permanent magnet 3 For its circumferential direction, the circumferential directions of the two adjacent permanent magnets 3 are the same, thereby forming a problem of SS-Li SS magnetic pole distribution arranged along the circumference of the sleeve, and two adjacent permanent magnets 3 in the circumferential direction. A separator 4 made of a magnetically permeable material is also provided.

Since the permanent magnet tube 5 is usually relatively long, the permanent magnet 3 in the above second structure type can be manufactured in sections along the longitudinal direction of the permanent magnet tube 5 for the convenience of processing.

By making the adjacent ends of the adjacent permanent magnets 3 of the same polarity of the sleeves, the magnetic lines of the permanent magnets 3 are individually pierced and penetrated into the side wall of the sleeve to form a loop, thereby ensuring the magnetic field of each permanent magnet 3. Independence also ensures the independence of the adsorption function and range of action of each permanent magnet 3 on the ferrous material. This type of structure makes the effective adsorption zone of the iron impurities corresponding to the magnetic poles of each permanent magnet 3 spread over the circumferential and full length of the casing surface, ensuring that the permanent magnet tube 5 can effectively form iron impurities throughout its length. Adsorption.

According to physical common knowledge, the magnetic pole of the magnet has the strongest adsorption force to the ferrous material. Therefore, the so-called effective impurity adsorption region of the iron impurity refers to a portion on the surface of the sleeve 1 corresponding to the position of the magnetic poles of the permanent magnets 3, and also That is, the magnetic lines of the respective permanent magnets 3 are each concentrated at a portion of the side wall of the sleeve 2. The effective adsorption zone of the iron impurities on the permanent magnet tube shown in Fig. 2 is a ring surrounded by the circumferential direction of the permanent magnet tube, and the width of the ring and its distribution on the surface of the permanent magnet tube The thickness and position of the partition correspond. The effective adsorption zone of the iron impurities on the permanent magnet tube shown in Fig. 3 is a plurality of strips distributed uniformly along the circumference of the sleeve 2, the strips extending along the length of the sleeve, the width of each strip and the circumference of the sleeve 2 The position corresponds to the thickness and position of the partition 4.

The permanent magnet tubes 5 of the above two types of structures are all round tubes, and in addition, the permanent magnet tubes 5 may also be square tubes or tubes of other cross-sectional shapes. Since each of the permanent magnet tubes 5 has a plurality of small magnetic fields formed by the permanent magnets therein, and the small magnetic fields have independent functions on the adsorption function and the range of action of the iron materials, and thus, the plurality of roots are passed through the frame. The magnetic tube 5 is combined to construct a combined magnetic field formed by splicing a plurality of small magnetic fields, and the combined magnetic field can be used to perform iron removal treatment on the water flowing through. The magnetic field iron removal apparatus of the present invention is proposed based on this idea.

It should be pointed out that because the adsorption force of the magnet on the iron impurities in the water is related to the distance between the two, the farther the distance is, the smaller the adsorption force is. Therefore, in order to ensure the reliable adsorption of the iron shield in the water On the surface of the permanent magnet tube 5, when the magnetic field iron removal device is constructed by using the permanent magnet tube 5, the distance between adjacent permanent magnet tubes can be adjusted according to the specific conditions of the iron impurities in the water to be treated, the flow rate of the water flow, etc., so that The effective adsorption ranges of adjacent permanent magnet tubes are connected or partially overlapped. The effective adsorption range refers to a range in which the permanent magnet tube 5 can reliably adsorb iron impurities to its surface, which is a three-dimensional space surrounding the permanent magnet tube.

It should also be noted that in order to fully utilize the performance of the magnetic field iron removal apparatus, the permanent magnet 5 in the apparatus should be as perpendicular as possible to the direction of water flow. Fig. 3 shows a specific application of the magnetic field iron removal purifying apparatus of the present invention in a power plant condenser. Here, the magnetic field iron removal purifying apparatus of the present invention is used for de-ironing purification of power plant condensed water.

As shown in Fig. 3, the condensed water magnetic field iron removal device 8 is installed in the hot water well 7 of the condenser 6, and is located above the water outlet of the hot water well, and the condensed water in the hot water well 7 flows out through the ice outlet. The well is sent to the next link by the condensate pump 9.

Since the flow rate of the condensed water in the hot water well 7 is relatively large, a large combined magnetic field is required to ensure sufficient flow capacity to avoid harmful resistance to the condensate pump inlet due to the provision of the magnetic field iron removal device.

When the water in the hot water well 7 flows only from the periphery to the water outlet, the condensed water magnetic field removing iron cleaning device 8 can be made into a cofferdam type annular structure having a sufficient height as shown in Figs.

For the square ring structure shown in FIG. 4, for the convenience of assembly, the front, rear, left, and right planes of the square ring can be assembled into four rectangular plane units 10 as shown in FIG. 5, and then four. The rectangular planar units 10 are combined into a square ring. The rectangular planar unit 10 is formed by combining a plurality of permanent magnet tubes 5 arranged in parallel with each other through a frame U, and the magnetic field effective adsorption ranges of the adjacent two permanent magnet tubes 5 are connected or partially overlapped.

For the toroidal structure shown in Fig. 7, the permanent magnet tubes 5 can be directly combined by using the upper and lower frames 1 1 .

After the magnetic field iron removing device 8 of the annular structure is disposed above the water outlet of the hot water well, the iron impurities in the water are adsorbed to the permanent magnet tube as the condensed water flows from the periphery through the gap between the permanent magnet tubes 5 into the water outlet. On the surface of 5, the water is purified.

The hot water well for the condensed water flowing from the periphery and the upper side to the water outlet can be made into a condensed water magnetic field removing iron cleaning device 8 as shown in Figs. 6 and 8 at the lower end opening, and the permanent magnet tube 5 is arranged at the periphery and the top. The hood structure.

Compared with the square ring structure shown in FIG. 4, the structure shown in FIG. 6 has a top rectangular plane. Yuan. Compared to the toroidal structure shown in Fig. 7, the structure shown in Fig. 8 has a top circular planar unit.

After the cover type magnetic field iron removing device shown in Fig. 6 and Fig. 8 is buckled on the water outlet of the hot water well, the device can perform iron removal and purification treatment on the condensed water flowing into the water outlet from the periphery and the upper side.

In the condenser hot water well, it is a magnetic field iron removal device with a ring structure, or a magnetic field iron removal device with a cover structure, and the area of the concrete, depending on the shape of the water flow section in the hot water well. And condensate flow. For the purified water stream, the water flow should be cleaned at full flow, that is, the magnetic field should be completely closed on the water flow section. Figure 9 shows the specific application of the magnetic field iron removal purification device of the present invention in a water supply system of a power plant. Here, the magnetic field iron removal purification device is used to remove iron from the power supply of the power plant.

As shown in Fig. 9, the magnetic field iron removal purifying device for de-ironing the power supply system of the power plant is installed in the deaerating water tank 14 and is located in the gas outlet of the deaerating water tank. The deaerator tank is a thermal equipment with a single water space. Condensed water flows from the upper part and feed water flows out from the lower part.

Referring to FIG. 10 to FIG. 12, the magnetic field iron removal device in the oxygen removal water tank 14 is a three-dimensional grid structure, and two horizontally arranged planar units 13 and four vertically disposed planar units 12 are formed to cross each other. The planar units 1 3 and 14 are each formed by combining a plurality of permanent magnet tubes 5 through a frame 1 1 , and two horizontally arranged planar units 13 are arranged in parallel with each other, and the four vertically disposed planar units 12 are also mutually connected to each other. Parallel spacing settings.

For the deaerating water tank 14 of the horizontal cylindrical structure, the vertically disposed planar units 12 are perpendicular to the central axis of the oxygen scavenging water tank 14, and are spaced apart along the central axis. Since the operating water level in the deaerating water tank 14 generally has a space of 300-400 inches from the top of the water tank, the height of the vertically disposed flat unit 12 should be higher than the operating water level.

The flow area of the magnetic field iron removal purifying device in the deaerating water tank 14 is larger than the inlet pipe area of the feed water pump 15 to ensure that no harmful resistance is generated to the inlet of the feed water pump.

In the deaerating water tank, a magnetic field iron removal purifying device adopting a three-dimensional grid structure can purify the water flow through the magnetic field and purify the water flowing from the various directions to the lower water outlet. Moreover, it is conceivable that a multi-layer combined magnetic field can be used for multiple iron removal purifications to obtain a better purification effect.

In the above examples, the permanent magnet tubes 5 in the purification device are arranged in parallel with each other. In practical applications, the permanent magnet tubes may be arranged alternately as needed, or the wave shape as shown in FIG. Arrangement.

For a larger combined magnetic field, several permanent magnet tubes 5 can be combined into a smaller unit by a frame (see Fig. 5), and then several units are combined by the frame to have a desired shape and a required area. The magnetic field removes the iron purifying device, and such a unit may be a single layer or a plurality of layers as needed, and may be rectangular, circular, semicircular, or the like.

The above examples are intended to be illustrative of the present invention and are not intended to limit the scope of the invention.

Claims

Rights request

A magnetic field iron removal purification device, characterized in that the device is composed of a plurality of permanent magnet tubes through a frame, and the effective adsorption ranges of the permanent magnet tubes to the iron shields in the water are sequentially connected in space, thereby Forming a combined magnetic field formed by splicing magnetic fields of a plurality of permanent magnet tube units; as the water to be purified flows through the combined magnetic field, iron impurities in the water are adsorbed onto the surface of the permanent magnet tube in the combined magnetic field; The effective adsorption range is a range in which the permanent magnet tube can adsorb the iron impurities onto the surface thereof, and the range is a three-dimensional space surrounding the permanent magnet tube; the permanent magnet tube includes a sleeve, and the plurality of permanent magnets in the sleeve are the same The extremely opposite form is fixedly packaged.

2. The purification apparatus according to claim 1, wherein the sleeve is a circular tube and is made of a non-magnetic material; the permanent magnet is made of alumino-nickel-cobalt, samarium-cobalt alloy, neodymium-iron-iron or Made of ferrite permanent magnet material.

3. The purification apparatus according to claim 2, wherein the permanent magnet is a cylindrical section matching the inner diameter of the sleeve, and the magnetic pole direction of the cylinder section is an axial direction thereof, and a plurality of cylindrical shapes are The magnets are arranged along the length of the sleeve to form N (or S) - SS - and SS - Li - SS N (or S ) magnetic poles arranged along the length of the sleeve, and the effective adsorption area of the iron impurities The circumferential and full length of the surface of the casing, the effective adsorption zone of the iron impurities refers to the location on the surface of the casing corresponding to the position of the magnetic poles of the permanent magnets, that is, the magnetic lines of each permanent magnet are concentrated through the casing side. The part of the wall.

4. The purification apparatus according to claim 3, wherein the sleeve is made of stainless steel, and a partition made of a magnetically permeable material is disposed between two adjacent cylindrical permanent magnets in the sleeve. Both ends of the casing are sealed by non-magnetic materials, and the sealing method is blocked by mechanical sealing or argon arc welding.

5. The purification apparatus according to claim 2, wherein the permanent magnet is partially annular, and the plurality of permanent magnets are circumferentially arranged in a ring shape matching the inner diameter of the sleeve, ₇ j magnet The direction of the magnetic pole is its circumferential direction, forming a distribution of the Li-SS-NN SS magnetic poles arranged along the circumference of the sleeve. The effective adsorption area of the iron impurities is distributed throughout the circumference and the full length of the casing surface, and the iron impurities are effective. The adsorption zone refers to the portion of the surface of the sleeve corresponding to the position of the magnetic poles of the permanent magnets, that is, the portions of the magnetic lines of the permanent magnets that converge through the side walls of the sleeve.

6. A power plant condensed water magnetic field iron removal purifying device, characterized in that the device is arranged above a water outlet of a steam turbine condenser hot water well, and is composed of a plurality of permanent magnet tubes through a frame, each permanent magnet tube The effective adsorption range of the iron impurities in the water is sequentially connected in space, thereby forming a combined magnetic field formed by merging magnetic fields of a plurality of permanent magnet tubes; the water flows through the combined magnetic field from the hot water The well flows into its water outlet, and the iron impurities in the water are adsorbed onto the surface of the permanent magnet tube in the combined magnetic field; the effective adsorption range is a range in which the permanent magnet tube can adsorb the iron impurities onto the surface thereof, and the range is one a three-dimensional space surrounding the permanent magnet tube; the permanent magnet tube includes a sleeve, and the plurality of permanent magnets in the sleeve are fixedly packaged in the opposite poles.

7. The purification apparatus according to claim 6, wherein the sleeve is a circular tube and is made of a non-magnetic material; the permanent magnet is made of alumino-nickel-cobalt, samarium-cobalt alloy, neodymium-iron-iron or Made of ferrite permanent magnet material.

8. The purification apparatus according to claim 7, wherein the permanent magnet is a cylindrical section matching the inner diameter of the sleeve, and the magnetic pole direction of the cylindrical section is an axial direction thereof, and a plurality of cylindrical shapes are The magnets are arranged along the length of the sleeve to form N (or S)-SS-----SS---S-N (or S) magnetic pole distribution arranged along the length of the sleeve, and the effective adsorption area of the iron impurities The circumferential and full length of the surface of the casing, the effective adsorption zone of the iron impurities refers to the location on the surface of the casing corresponding to the position of the magnetic poles of the permanent magnets, that is, the magnetic lines of each permanent magnet are concentrated through the casing side. The part of the wall.

9. The purification apparatus according to claim 8, wherein the sleeve is made of stainless steel, and a partition made of a magnetically permeable material is disposed between two adjacent cylindrical permanent magnets in the sleeve. Both ends of the casing are sealed by non-magnetic materials, and the sealing method is blocked by mechanical sealing or argon arc welding.

1 . The purification apparatus according to claim 7 , wherein the permanent magnet is partially annular, and the plurality of permanent magnets are circumferentially arranged in a ring matching the inner diameter of the sleeve, and the permanent magnet The direction of the magnetic pole is its circumferential direction, forming an arrangement along the circumference of the sleeve and an SS-question... SS magnetic pole distribution, the effective adsorption region of the iron impurity is distributed throughout the circumference and the full length of the casing surface, and the iron impurities The effective adsorption zone refers to the portion of the surface of the sleeve corresponding to the position of the magnetic poles of the permanent magnets, that is, the portions of the magnetic lines of the permanent magnets that converge through the side walls of the sleeve.

1 . The magnetic field iron removal purification device according to any one of claims 6 to 10, wherein the plurality of permanent magnet tubes are combined into a hollow ring shape around the water outlet through a frame, and the annular purification device is passed through The water flow flowing into the water outlet from the surrounding water in the hot water well is subjected to iron removal purification.

12. The magnetic field iron removal apparatus according to claim 11, wherein the ring shape is a square ring shape, and the square ring structure is formed by splicing four rectangular plane units of front, rear, left, and right, each of which Rectangular planar units are assembled from a plurality of permanent magnet tubes through a frame.

The magnetic field iron removal purifying apparatus according to any one of claims 6 to 10, wherein The dry root permanent magnet tube is combined into a lower end opening, a circumference and a top portion are arranged with a cap shape of a permanent magnet tube, and the cover type purifying device cover is above the water outlet, and flows into the water outlet from the periphery and the upper portion in the hot water well. The water stream is subjected to iron removal purification.

14. The magnetic field iron removal purification apparatus according to claim 13, wherein the cover shape is formed by splicing five rectangular unit units of front, rear, left, right, and upper, each rectangular planar unit is A number of permanent magnet tubes are assembled by a frame.

A magnetic field de-iron purification device for a power plant water supply system, characterized in that the device is disposed in an oxygen removal water tank in a power supply system of a power plant, and is a planar unit arranged by a plurality of horizontal units and a plurality of vertically arranged planar units a three-dimensional grid structure formed by intersecting, a plurality of horizontally disposed planar units are disposed in parallel with each other, and a plurality of vertical planar units are also disposed in parallel with each other; the horizontally disposed planar unit and the vertically disposed plane The unit is composed of a plurality of permanent magnet tubes through a frame, and the effective adsorption ranges of the permanent magnet tubes in each plane unit for the iron impurities in the water are sequentially connected in space, thereby forming a magnetic field of a plurality of permanent magnet tubes. a planar combined magnetic field formed by splicing each other, wherein the effective adsorption range is a range in which the permanent magnet tube can adsorb the iron impurities onto the surface thereof, and the range is a three-dimensional space surrounding the permanent magnet tube; The sleeve, a plurality of permanent magnets in the sleeve are fixedly packaged in the same polarity.

16. The purification apparatus according to claim 15, wherein the sleeve is a circular tube and is made of a non-magnetic material; the permanent magnet is made of alumino-nickel-cobalt, samarium-cobalt alloy, neodymium-iron-iron or Made of ferrite permanent magnet material.

17. The purification apparatus according to claim 16, wherein the permanent magnet is a cylindrical section matching the inner diameter of the sleeve, and the magnetic pole direction of the cylindrical section is an axial direction thereof, and a plurality of cylindrical shapes. The permanent magnets are arranged along the length of the sleeve to form a N (or S)-SS-Li-SS-Li-SS N (or S) magnetic pole distribution arranged along the length of the sleeve, and the iron impurities are effectively adsorbed. The area is distributed in the circumferential direction and the full length of the surface of the casing. The effective adsorption area of the iron impurities refers to the position on the surface of the casing corresponding to the position of the magnetic poles of the permanent magnets, that is, the magnetic lines of each permanent magnet are concentrated through the casing. The part of the side wall.

18. The purification apparatus according to claim 17, wherein the sleeve is made of stainless steel, and a separator made of a magnetically permeable material is disposed between two adjacent cylindrical permanent magnets in the sleeve. The two ends of the casing are sealed by non-magnetic materials, and the sealing method is blocked by mechanical sealing or argon arc welding.

19. The purification apparatus according to claim 16, wherein the permanent magnet is partially annular, and the plurality of permanent magnets are circumferentially arranged in a ring matching the inner diameter of the sleeve, and the permanent magnet Magnetic pole To its circumferential direction, a dish-SS-NN SS magnetic pole distribution is formed along the circumference of the casing. The effective adsorption zone of the iron impurities is distributed over the circumferential and full length of the casing surface, and the iron impurities are effectively adsorbed. The area refers to the part of the surface of the sleeve corresponding to the position of the magnetic poles of the permanent magnets, that is, the magnetic lines of each permanent magnet are respectively concentrated through the side wall of the sleeve.

A method for de-ironing and purifying a feed water of a power plant boiler (a steam generator of a nuclear power plant), characterized in that a magnetic field according to any one of claims 6 to 14 is provided in a hot water well of a steam turbine condenser of a power plant In addition to the iron purification device, the water discharged from the hot water well is subjected to iron removal purification treatment.

A method for de-ironing and purifying a feed water of a power plant boiler (a steam generator of a nuclear power plant), characterized in that the oxygen-removing water tank in the power supply system of the power plant is provided with any one of claims 15 to 19. The magnetic field removing iron purifying device uses the device to perform iron removal purification treatment on the water flowing out of the hot water well.

A method for de-ironing and purifying a feed water of a power plant boiler (a steam generator of a nuclear power plant), characterized in that the magnetic field according to any one of claims 6 to 14 is provided in a hot water well of a steam turbine condenser of a power plant The iron purification device is used to perform the iron removal purification treatment on the water flowing out of the hot water well; and the magnetic field iron removal purification device according to any one of claims 15 to 19 is disposed in the oxygen removal water tank in the power supply system of the power plant. The device is used to perform iron removal purification treatment on the water flowing out of the hot water well.