A pre-positioned iron removal filter for a power plant condensate pump

Abstract

The application relates to the technical field of condensate water treatment of power plants, in particular to a power plant condensate water pre-iron-removing filter which comprises a dirt-removing component and a filtering component. The dirt-removing component comprises an outer cylinder, an inner cylinder arranged at the center of the inner cylinder, the inner diameter of the outer cylinder is larger than that of the inner cylinder, and a cylinder cover arranged at the upper end of the outer cylinder. The device is provided with the inner cylinder and the outer cylinder, condensate water first enters the inner cylinder, and then flows into the outer cylinder after being filled, so that the flow rate of the water can be reduced, the impact on the filter screen can be avoided, the iron filings in the condensate water are removed by using the iron remover driven by the motor to rotate, the iron-removing effect is good, meanwhile, the impurities on the filter screen can be treated in the process of lifting and lowering the cylinder cover, and the impurities on the filter screen are prevented from being accumulated too much to cause blockage.

Description

Technical Field

[0001] This invention relates to the field of power plant condensate treatment technology, and in particular to a pre-filter for removing iron from a power plant condensate pump. Background Technology

[0002] The feedwater system for thermal power plant boilers mainly consists of turbine condensate, boiler feedwater, and heater condensate. Condensate accounts for over 90% of the boiler feedwater volume. Therefore, high-quality feedwater requires not only deep purification of the boiler feedwater but also fine treatment of the relatively low-impurity condensate. The quality of the condensate directly affects the unit's operation. In actual operation, the boiler feedwater pipelines in power plants generate a significant amount of iron oxide impurities and friction corrosion products. Excessive amounts of these harmful impurities can affect boiler operational safety. Therefore, the exhaust steam from the turbine must pass through a condensate fine treatment system before entering the boiler after being cooled by circulating water in the condenser. Existing condensate pump pre-filters primarily use magnetic filters to achieve both filtration and iron removal. However, the amount of iron filings attracted by magnetism is limited, necessitating frequent replacement. Filter replacement is complex, impacting maintenance time. Furthermore, if water in the condensate pipeline directly impacts the filter, the iron filings on the filter can easily return to the water, affecting the water intake efficiency. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention is proposed.

[0004] Therefore, the technical problem to be solved by this invention is that the amount of iron filings adsorbed by magnetism is fixed, so it needs to be replaced frequently. However, replacing the filter screen is complicated and affects maintenance time. Furthermore, if the water in the condensate pipe directly impacts the filter screen, the iron filings on the filter screen can easily return to the water, affecting the water intake effect.

[0005] To solve the above technical problems, the present invention provides the following technical solution: a pre-iron removal filter for power plant condensate pumps, comprising a dirt removal component, the dirt removal component comprising an outer cylinder, an inner cylinder disposed at the center of the inner cylinder, the inner diameter of the outer cylinder being larger than the inner diameter of the inner cylinder, and a cylinder cover disposed at the upper end of the outer cylinder;

[0006] A filter assembly, comprising a fixed ring fixedly connected to the top of the outer cylinder, an elastic element connected to the fixed ring, and a movable ring located between the outer cylinder and the inner cylinder.

[0007] As a preferred embodiment of the pre-filter for the condensate pump in a power plant according to the present invention, the outer cylinder includes an inlet pipe, an outlet pipe, a first drain pipe, a second drain pipe, a baffle, a sealing valve, and an annular plate. The inlet pipe communicates with the inner cylinder, the outlet pipe communicates with the cavity between the outer cylinder and the inner cylinder, the first drain pipe communicates with the bottom of the cavity between the outer cylinder and the inner cylinder, the second drain pipe communicates with the bottom of the inner cylinder, the baffle is fixedly connected to the inner wall of the outer cylinder, the sealing valve is installed at the end of the second drain pipe, and the annular plate is fixedly connected to the top of the outer cylinder.

[0008] As a preferred embodiment of the pre-iron removal filter for the power plant condensate pump described in this invention, the annular plate has a plurality of arrayed through slots extending through the top, and draft bevels are provided at the outer diameter of the top and bottom of the through slots.

[0009] As a preferred embodiment of the pre-filter for the condensate pump of the power plant according to the present invention, the inner cylinder includes a motor, an iron remover and a permanent magnet propeller. The motor is fixedly connected to the bottom of the outer cylinder at the center position. The output end of the motor passes through the bottom of the outer cylinder. The iron remover is fixedly connected to the output end of the motor. The permanent magnet propeller is fixedly connected to the outside of the iron remover.

[0010] As a preferred embodiment of the pre-iron removal filter for the power plant condensate pump described in this invention, a lifting ring is fixedly connected to the top of the cylinder cover;

[0011] The bottom of the outer cylinder is fixedly connected to a support leg.

[0012] As a preferred embodiment of the pre-iron removal filter for power plant condensate pumps described in this invention, the fixing ring includes protrusions and vertical rods, with a plurality of protrusions arranged in a rectangular array fixedly connected to the outside of the fixing ring, and the vertical rods fixedly connected to the circumferential surface of the protrusions.

[0013] As a preferred embodiment of the pre-iron removal filter for the power plant condensate pump described in this invention, a chamber is formed on the circumferential surface of the vertical rod.

[0014] As a preferred embodiment of the pre-iron removal filter for power plant condensate pumps according to the present invention, the elastic element includes a first spring, a sliding plate, and a curved block. One end of the first spring is fixedly connected to the inner wall of the chamber, the sliding plate is fixedly connected to the other end of the first spring, the sliding plate is slidably connected to the chamber, and the curved block is fixedly connected to one side of the sliding plate.

[0015] As a preferred embodiment of the pre-iron removal filter for power plant condensate pumps according to the present invention, the moving ring includes a mating block, a second spring, a filter screen, and a limiting plate. The mating block is fixedly connected to the outside of the moving ring. One end of the second spring is fixedly connected to the bottom of the moving ring, and the other end of the second spring is fixedly connected to the baffle. The outer diameter of the filter screen is fixedly connected to the inner side of the moving ring. The limiting plate is fixedly connected to the inner diameter of the filter screen. The filter screen is inclined towards the center of the inner cylinder. The limiting plate is slidably connected to the inner cylinder.

[0016] As a preferred embodiment of the pre-iron removal filter for the power plant condensate pump described in this invention, a first arc surface is provided at the upper end of the outer diameter of the mating block, and a second arc surface is provided at the lower end of the outer diameter of the mating block.

[0017] The beneficial effects of the present invention are as follows: The device of the present invention is provided with an inner cylinder and an outer cylinder. Condensate first enters the inner cylinder and flows into the outer cylinder after it is full, which can reduce the water flow rate and avoid impact on the filter screen. It is equipped with an iron remover driven by a motor to remove iron filings in the condensate, which has a good iron removal effect. At the same time, it can treat impurities on the filter screen during the raising and lowering of the cylinder cover, so as to avoid excessive accumulation of impurities on the filter screen and blockage. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0019] Figure 1 A schematic diagram of the overall structure of a pre-emergence iron removal filter for a power plant condensate pump according to an embodiment of the present invention;

[0020] Figure 2 A side view of the pre-emergence iron removal filter for a power plant condensate pump, as provided in one embodiment of the present invention;

[0021] Figure 3 An enlarged schematic diagram of the pre-emergence iron removal filter G of the power plant condensate pump according to an embodiment of the present invention;

[0022] Figure 4 A partial cross-sectional view of the vertical rod in the pre-iron removal filter for the condensate pump in a power plant, as provided in an embodiment of the present invention;

[0023] Figure 5 This is a partial cross-sectional view of the moving ring in the pre-iron removal filter of the power plant condensate pump according to an embodiment of the present invention. Detailed Implementation

[0024] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure will be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0027] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places throughout this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that mutually excludes other embodiments.

[0028] Example 1

[0029] Reference Figure 1 - Figure 5 This embodiment provides a pre-filter for removing iron from a power plant condensate pump, including a cleaning component 100. The cleaning component 100 includes an outer cylinder 101, an inner cylinder 102 disposed at the center of the outer cylinder 101, the inner diameter of the outer cylinder 101 being larger than the inner diameter of the inner cylinder 102, and a cylinder cover 103 disposed at the upper end of the outer cylinder 101.

[0030] Furthermore, the outer cylinder 101 includes an inlet pipe 101a, an outlet pipe 101b, a first drain pipe 101c, a second drain pipe 101d, a baffle 101e, a sealing valve 101f, and an annular plate 101h. The inlet pipe 101a is connected to the inner cylinder 102, the outlet pipe 101b is connected to the cavity between the outer cylinder 101 and the inner cylinder 102, the first drain pipe 101c is connected to the bottom of the cavity between the outer cylinder 101 and the inner cylinder 102, the second drain pipe 101d is connected to the bottom of the inner cylinder 102, the baffle 101e is fixedly connected to the inner wall of the outer cylinder 101, the sealing valve 101f is installed at the end of the second drain pipe 101d, and the annular plate 101h is fixedly connected to the top of the outer cylinder 101.

[0031] It should be noted that an electromagnetic valve is installed inside the first drain pipe 101c. Both the electromagnetic valve and the sealing valve 101f are connected to a controller installed on the outside of the outer cylinder 101. When the sealing valve 101f is opened, the electromagnetic valve opens simultaneously, which facilitates the drainage of internal sewage during maintenance. When the sealing valve 101f is closed, the electromagnetic valve closes simultaneously.

[0032] Furthermore, the annular plate 101h has multiple arrayed through slots 101h-1 extending through the top, and draft bevels 101h-2 are provided at the top and bottom outer diameters of the through slots 101h-1.

[0033] Furthermore, the inner cylinder 102 includes a motor 102a, a magnetic separator 102b, and a permanent magnet propeller 102c. The motor 102a is fixedly connected to the bottom of the outer cylinder 101 at the center position. The output end of the motor 102a passes through the bottom of the outer cylinder 101. The magnetic separator 102b is fixedly connected to the output end of the motor 102a. The permanent magnet propeller 102c is fixedly connected to the outside of the magnetic separator 102b.

[0034] It should be noted that, in order to improve the adsorption effect, there are 4 sets of permanent magnet propellers 102c, and the 4 permanent magnet propellers 102c in each set are located at the same height of the iron separator 102b.

[0035] Furthermore, a lifting ring 103a is fixedly connected to the top of the cylinder cover 103;

[0036] It should be noted that the lifting ring 103a facilitates the raising and lowering of the cylinder cover 103, which makes it easier for staff to inspect the inside of the device.

[0037] Furthermore, a support leg 104 is fixedly connected to the bottom of the outer cylinder 101.

[0038] It should be noted that the support leg 104 can provide stable support for the outer cylinder 101.

[0039] When in use, condensate is fed into the inner cylinder 102 through the inlet pipe 101a. At this time, the motor 102a is turned on. The output end of the motor 102a can drive the iron separator 102b to rotate. The permanent magnet propeller 102c on the rotating iron separator 102b attracts iron filings in the water. The water escapes from the inner cylinder 102, enters the outer cylinder 101, and is finally discharged through the outlet pipe 101b.

[0040] Example 2

[0041] Reference Figure 1 - Figure 5This embodiment provides a pre-filter for removing iron from a power plant condensate pump, including a filter assembly 200. The filter assembly 200 includes a fixed ring 201 fixedly connected to the top of the outer cylinder 101, an elastic member 202 connected to the fixed ring 201, and a movable ring 203 located between the outer cylinder 101 and the inner cylinder 102.

[0042] Furthermore, the fixing ring 201 includes a protrusion 201a and a vertical rod 201b. A plurality of protrusions 201a arranged in a rectangular array are fixedly connected to the outside of the fixing ring 201, and the vertical rod 201b is fixedly connected to the circumferential surface of the protrusions 201a.

[0043] Furthermore, a cavity 201b-1 is formed on the circumferential surface of the vertical rod 201b.

[0044] Furthermore, the elastic element 202 includes a first spring 202a, a sliding plate 202b, and a curved block 202c. One end of the first spring 202a is fixedly connected to the inner wall of the chamber 201b-1, the sliding plate 202b is fixedly connected to the other end of the first spring 202a, the sliding plate 202b is slidably connected to the chamber 201b-1, and the curved block 202c is fixedly connected to one side of the sliding plate 202b.

[0045] It should be noted that when the draft angle 101h-2 comes into contact with the curved block 202c, the first spring 202a will be compressed.

[0046] Furthermore, the moving ring 203 includes a mating block 203a, a second spring 203b, a filter screen 203c, and a limiting plate 203d. The mating block 203a is fixedly connected to the outside of the moving ring 203. One end of the second spring 203b is fixedly connected to the bottom of the moving ring 203, and the other end of the second spring 203b is fixedly connected to the baffle 101e. The outer diameter of the filter screen 203c is fixedly connected to the inner side of the moving ring 203. The limiting plate 203d is fixedly connected to the inner diameter of the filter screen 203c. The filter screen 203 is inclined towards the center of the inner cylinder 102. The limiting plate 203d is slidably connected to the inner cylinder 102.

[0047] It should be noted that the condensate can filter out some impurities through the filter screen 203c. The filter screen 203c will not come into contact with the cylinder cover 103 during the movement, and when the filter screen 203c is in the initial position, its inclined lower end is flush with the top of the inner cylinder 102.

[0048] In addition, the spring constant of the first spring 202a is greater than that of the second spring 203b. The first spring 202a will only be compressed after the second spring 203b is compressed or stretched a certain distance.

[0049] Multiple water outlet holes are provided on the circumferential surface of the inner cylinder 102b. Under normal circumstances, the water outlet holes are blocked by the limiting plate 203d. When too many impurities accumulate on the filter screen 203c, it may sink. At this time, the limiting plate 203d slides downward, and the sewage in the inner cylinder 102b can seep from the water outlet holes onto the filter screen 203c for further filtration, further avoiding impact on the filter screen 203c.

[0050] Furthermore, a first arc surface 203a-1 is provided at the upper end of the outer diameter of the mating block 203a, and a second arc surface 203a-2 is provided at the lower end of the outer diameter of the mating block 203a.

[0051] It should be noted that, Figure 1 - Figure 5 The structure shown is for reference only regarding mechanical transmission and is not intended as a structural proportion diagram of the final product.

[0052] During use, before lifting the cylinder cover 103 to inspect the inside of the device, open the sealing valve 101f to drain the wastewater inside the device. As the cylinder cover 103 is lifted, the curved block 202c pushes the moving ring 203a upward. The moving ring 203a slides on the outer wall of the inner cylinder 102 through the limiting plate 203d, thereby driving the filter screen 203c to move upward. At this time, the second spring 203b is stretched. After the second spring 203b is stretched a certain distance, the first spring 202a is compressed, and the curved surface of the curved block 202c... The side slides into contact with the second arc surface 203a-2, causing the curved block 202c to slide to the outside of the moving ring 203a. At this time, the second spring 203b returns to its original position. Due to the vertical shaking that occurs when the second spring 203b returns to its original position, the impurities on the filter screen 203c can fall into the bottom of the inner cylinder 102 along the curved surface of the inner wall of the inner cylinder 102. The curved block 202c continues to move upward and can move out of the through groove 101h-1 through the draft angle 101h-2 at the top and bottom of the through groove 101h-1, thereby removing the cylinder cover 103.

[0053] When the cap 103 is closed, the vertical rod 201b is inserted into the through groove 101h-1 until the curved block 202c moves out from the bottom of the through groove 101c and slides into contact with the first arc surface 203a-1 at the upper end of the moving ring 203. At this time, the moving ring 203 is pushed downward, and the second spring 203b is compressed. When the second spring 203b is compressed a certain distance, the first spring 202a is compressed, causing the curved block 202c to slide to the outside of the moving ring 203a. At this time, the second spring 202b... When the spring 203b returns to its original position, it causes a vertical sway, which allows impurities on the filter screen 203c to fall along the curved surface of the inner wall of the inner cylinder 102 to the bottom of 102. Due to the influence of gravity, the cylinder cover 103 will continue to descend until the vertical rod 201b abuts against the baffle 101e, thus sealing the cylinder cover 103 against the outer cylinder 101. Similarly, when the cylinder cover 103 is closed, it also cleans the impurities on the filter screen 203c, making it more practical.

[0054] After the maintenance is completed, condensate is fed into the inner cylinder 102 through the inlet pipe 101a. At this time, the motor 102a is turned on. The output end of the motor 102a can drive the iron separator 102b to rotate. The permanent magnet propeller 102c on the rotating iron separator 102b attracts iron filings in the water. The water escapes from the inner cylinder 102, enters the outer cylinder 101, and is finally discharged through the outlet pipe 101b.

[0055] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0056] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the currently considered best mode for carrying out the invention, or those features that are not relevant to implementing the invention) may be omitted.

[0057] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A pre-filter for removing iron from condensate pumps in power plants, characterized in that: include, The cleaning assembly (100) includes an outer cylinder (101), an inner cylinder (102) disposed at the inner center of the outer cylinder (101), the inner diameter of the outer cylinder (101) being larger than the inner diameter of the inner cylinder (102), and a cylinder cover (103) disposed at the upper end of the outer cylinder (101). The filter assembly (200) includes a fixed ring (201) fixedly connected to the top of the outer cylinder (101), an elastic member (202) connected to the fixed ring (201), and a movable ring (203) located between the outer cylinder (101) and the inner cylinder (102). The outer cylinder (101) includes an inlet pipe (101a), an outlet pipe (101b), a first drain pipe (101c), a second drain pipe (101d), a baffle (101e), a sealing valve (101f), and an annular plate (101h). The inlet pipe (101a) communicates with the inner cylinder (102), and the outlet pipe (101b) communicates with the cavity between the outer cylinder (101) and the inner cylinder (102). The sewage pipe (101c) is connected to the bottom of the cavity between the outer cylinder (101) and the inner cylinder (102), the second sewage pipe (101d) is connected to the bottom of the inner cylinder (102), the baffle (101e) is fixedly connected to the inner wall of the outer cylinder (101), the sealing valve (101f) is installed at the end of the second sewage pipe (101d), and the annular plate (101h) is fixedly connected to the top of the outer cylinder (101). The annular plate (101h) has multiple arrayed through slots (101h-1) extending through the top, and draft bevels (101h-2) are provided at the top and bottom outer diameters of the through slots (101h-1). The inner cylinder (102) includes a motor (102a), a magnetic separator (102b), and a permanent magnet propeller (102c). The motor (102a) is fixedly connected to the bottom of the outer cylinder (101) at the center position. The output end of the motor (102a) passes through the bottom of the outer cylinder (101). The magnetic separator (102b) is fixedly connected to the output end of the motor (102a). The permanent magnet propeller (102c) is fixedly connected to the outside of the magnetic separator (102b). The fixing ring (201) includes a protrusion (201a) and a vertical rod (201b). A plurality of protrusions (201a) arranged in a rectangular array are fixedly connected to the outside of the fixing ring (201), and the vertical rod (201b) is fixedly connected to the circumferential surface of the protrusion (201a). A cavity (201b-1) is formed on the circumferential surface of the vertical rod (201b); The elastic element (202) includes a first spring (202a), a sliding plate (202b), and a curved block (202c). One end of the first spring (202a) is fixedly connected to the inner wall of the chamber (201b-1), the sliding plate (202b) is fixedly connected to the other end of the first spring (202a), the sliding plate (202b) is slidably connected to the chamber (201b-1), and the curved block (202c) is fixedly connected to one side of the sliding plate (202b). The moving ring (203) includes a mating block (203a), a second spring (203b), a filter screen (203c), and a limiting plate (203d). The mating block (203a) is fixedly connected to the outside of the moving ring (203). One end of the second spring (203b) is fixedly connected to the bottom of the moving ring (203), and the other end of the second spring (203b) is fixedly connected to the baffle (101e). The outer diameter of the filter screen (203c) is fixedly connected to the inner side of the moving ring (203). The limiting plate (203d) is fixedly connected to the inner diameter of the filter screen (203c). The filter screen (203c) is inclined towards the center of the inner cylinder (102). The limiting plate (203d) is slidably connected to the inner cylinder (102). A first arc surface (203a-1) is provided at the upper end of the outer diameter of the mating block (203a), and a second arc surface (203a-2) is provided at the lower end of the outer diameter of the mating block (203a).

2. The pre-iron removal filter for power plant condensate pumps according to claim 1, characterized in that: A lifting ring (103a) is fixedly connected to the top of the cylinder cover (103); The bottom of the outer cylinder (101) is fixedly connected to a support leg (104).

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