Filtering device and filtering system for condensate of thermal power plants

Abstract

The utility model discloses a kind of filtering device and filtering system for condensate of thermal power plant. Among them, filtering device includes: shell, water inlet and water outlet are oppositely provided to shell;Magnetic attraction component, set in shell, magnetic attraction component is configured in the iron-containing particles in adsorbing condensate;Support frame, set in shell, support frame is configured in supporting magnetic attraction component;Lifting mechanism, with support frame fixed connection connection, lifting mechanism is configured in supporting frame moves in shell. Filtering device can improve the retention rate of iron particles in condensate according to the setting of magnetic attraction component and support frame, improve the iron removal efficiency of condensate, and then improve the economy, safety and environmental protection of thermal power plant.

Description

Technical Field

[0001] This utility model relates to the field of water quality control technology, and in particular to a filtration device and filtration system for condensate in thermal power plants. Background Technology

[0002] When a thermal power plant is in operation, the exhaust steam that has done work in the steam turbine is cooled by cooling water in the condenser and reforms into condensate. The quality of the condensate can affect the normal operation of equipment such as boilers and steam turbines. Therefore, treating the condensate is a key step in ensuring the safe, efficient and economical operation of the generator set.

[0003] Existing filtration devices have a rejection rate of less than 50% for submicron iron particles (accounting for more than 40%), resulting in low iron removal efficiency in condensate. At the same time, the inlet temperature is too high, which affects the service life of the components in the filtration device and increases maintenance costs. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] In view of this, the present invention provides a filtration device and filtration system for condensate in thermal power plants, wherein the filtration device can improve the retention rate of iron particles in condensate and improve the iron removal efficiency of condensate by setting up magnetic components and support frames, thereby improving the economy, safety and environmental protection of thermal power plants.

[0006] Specifically, the following technical solutions are included:

[0007] An embodiment of the first aspect of this utility model provides a filtration device for condensate in a thermal power plant, the filtration device comprising:

[0008] The outer casing has an inlet and an outlet oppositely arranged, and the inner wall of the outer casing is spiral-shaped.

[0009] A magnetic suction component is disposed inside the housing, and the magnetic suction component is configured to adsorb iron-containing particles in the condensate.

[0010] A support frame is disposed within the housing and is configured to support the magnetic assembly;

[0011] A lifting mechanism is fixedly connected to the support frame, and the lifting mechanism is configured to drive the support frame to move within the housing.

[0012] Optionally, the support frame includes four support vertical beams for connecting the connecting horizontal beams at both ends of the support vertical beams. The support vertical beams and the connecting horizontal beams form an integral frame. A grid frame is provided inside the integral frame, and the magnetic suction component is disposed inside the grid frame.

[0013] Optionally, the magnetic attraction component includes:

[0014] A permanent magnet rod is disposed within the grid frame, and the center distance between two adjacent permanent magnet rods is 5mm;

[0015] The system includes three rows of permanent magnet rods between the water inlet and the water outlet, with a spacing of 5mm between adjacent rows. When facing the water inlet or the water outlet, multiple rows of permanent magnet rods are provided, with adjacent rows of permanent magnet rods staggered.

[0016] Optionally, the magnetic attraction assembly further includes:

[0017] An electromagnetic coil is located between the water inlet and the water outlet. The electromagnetic coil is positioned between two adjacent rows of permanent magnet rods. The electromagnetic coil is supported by an aluminum core, which is fixedly connected to the support frame. The grid frame has a notch to facilitate the passage of the electromagnetic coil.

[0018] There are three rows of electromagnetic coils between the water inlet and the water outlet, and the three rows of electromagnetic coils are arranged in parallel.

[0019] Optionally, the support frame is made of stainless steel.

[0020] Optionally, the filtration device further includes:

[0021] The track, multiple tracks are disposed within the housing, the track is fitted onto the supporting vertical beam, and the supporting vertical beam is movable within the track.

[0022] Optionally, the support frame further includes a pair of intersecting inclined beams, the pair of inclined beams being disposed on the side of the overall frame facing the lifting mechanism, the lifting mechanism including a hydraulic rod, the fixed section of the hydraulic rod being fixedly disposed outside the housing, and the telescopic end of the hydraulic rod being fixedly connected to the connection point of the pair of inclined beams.

[0023] Optionally, the housing is further provided with a backwash port and a drain port, the backwash port and the drain port are located on the same side, and the housing is also provided with a differential pressure sensor interface. The backwash port is connected to the backwash device, and the differential pressure sensor is connected to the backwash device to transmit the differential pressure signal to the backwash device.

[0024] A second aspect of this utility model provides a filtration system for condensate in a thermal power plant, the filtration system comprising:

[0025] Such as the filtration device described above;

[0026] A backwashing device is connected to the filter device;

[0027] A heat exchange device is connected to the filter device, and the heat exchange device is located upstream of the water inlet of the filter device.

[0028] Optionally, the filtration system includes two heat exchange devices, each comprising:

[0029] The housing includes a titanium tube bellows disposed within the housing. The housing has a first inlet, a second inlet, a first outlet, and a second outlet. The first inlet and the first outlet are both connected to the bellows. The second inlet and the second outlet are both connected to the space formed by the housing and the titanium tube bellows. The first inlet is connected to condensate or heat network return water, and the second inlet is connected to heat network return water or the condensate.

[0030] This utility model provides a filtration device and system for condensate in thermal power plants. The filtration device includes a housing for allowing condensate to pass through and supporting various components of the filtration device. A magnetic adsorption component is disposed inside the housing and can adsorb iron-containing particles in the condensate. Through the reasonable arrangement of the support frame and the magnetic adsorption component, the magnetic adsorption component can cover 80% of the flow channel cross-sectional area, which can improve the adsorption of iron-containing particles in the condensate. At the same time, the inner wall of the housing is spiral-shaped, which can prolong the residence time of the condensate in the housing. Combined with the 80% flow channel area of ​​the magnetic adsorption component, full contact between the magnetic adsorption component and the condensate is achieved, further improving the adsorption of iron-containing particles in the condensate. After the magnetic adsorption component and the support frame are lifted by the lifting mechanism, the iron-containing particles on the magnetic adsorption component are cleaned by the backwashing device, which facilitates the adsorption of iron-containing particles in the next cycle and improves the adsorption effect of iron-containing particles.

[0031] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of a filtration device according to an embodiment of the present invention;

[0034] Figure 2 This is another schematic diagram of a filtering device according to an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of a magnetic suction assembly according to an embodiment of the present invention;

[0036] Figure 4 This is another schematic diagram of a magnetic suction assembly with the electromagnetic coil removed according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the track connection according to an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of a filtration system according to an embodiment of the present invention.

[0039] in, Figures 1 to 6 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0040] 100 Filtration device, 110 Housing, 111 Inlet, 112 Outlet, 113 Backwash port, 114 Drain port, 115 Differential pressure sensor interface, 120 Magnetic suction assembly, 121 Permanent magnet, 122 Electromagnetic coil, 130 Support frame, 140 Lifting mechanism, 150 Track, 200 Filtration system, 210 Backwash device, 220 Heat exchange device. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0042] Before providing a further detailed description of the embodiments of this utility model, the directional terms used in the embodiments of this utility model, such as "upper part", "lower part" and "side part", do not have the meaning of limiting the scope of protection of this utility model.

[0043] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0044] Figure 1 This is a schematic diagram of a filtration device according to an embodiment of the present invention; Figure 2 This is another schematic diagram of a filtering device according to an embodiment of the present invention.

[0045] like Figure 1 and Figure 2 As shown, one embodiment of this utility model provides a filtration device for condensate in a thermal power plant. The filtration device 100 includes:

[0046] The outer casing 110 has an inlet 111 and an outlet 112 arranged opposite to each other, and the inner wall of the outer casing 110 is spiral-shaped.

[0047] A magnetic adsorption component 120 is disposed inside the housing 110 and is configured to adsorb iron-containing particles in the condensate.

[0048] A support frame 130 is disposed within the housing 110 and is configured to support the magnetic assembly 120.

[0049] The lifting mechanism 140 is fixedly connected to the support frame 130, and the lifting mechanism 140 is configured to drive the support frame 130 to move within the housing 110.

[0050] The filter device 100 includes a housing 110, which allows condensate to pass through and supports the various components of the filter device 100. A magnetic adsorption component 120 is disposed inside the housing 110 and can adsorb iron-containing particles in the condensate. Through the reasonable arrangement of the support frame 130 and the magnetic adsorption component 120, the magnetic adsorption component 120 can cover 80% of the flow channel cross-sectional area, which can improve the adsorption of iron-containing particles in the condensate. At the same time, the inner wall of the housing 110 is spiral-shaped, which can prolong the residence time of condensate in the housing 110. Combined with the 80% flow channel area of ​​the magnetic adsorption component 120, the magnetic adsorption component 120 and the condensate can be fully contacted, further improving the adsorption of iron-containing particles in the condensate. After the magnetic adsorption component 120 and the support frame 130 are lifted by the lifting mechanism 140, the iron-containing particles on the magnetic adsorption component 120 are cleaned by the backwashing device, which facilitates the adsorption of iron-containing particles by the magnetic adsorption component 120 in the next cycle, thus improving the adsorption effect of iron-containing particles.

[0051] Specifically, the outer casing 110 can be made of stainless steel. This will not affect the magnetic field of the magnetic component 120, and will prevent iron particles in the condensate from adsorbing onto the outer casing 110, ensuring the stability and reliability of the lifting mechanism 140 in lifting the support frame 130 and the magnetic component 120, and preventing jamming. The outer casing 110 is typically designed as a cuboid with an internal accommodating space to house the various components within it. The magnetic component 120 typically includes multiple regularly arranged permanent magnets 121. The support frame 130 ensures the stable placement of the permanent magnets 121, thereby guaranteeing the stability of the magnetic field. The support frame 130 is also made of stainless steel. Because stainless steel is non-magnetic, it ensures the stability of the magnetic field of the magnetic component 120. Furthermore, it prevents corrosion of the support frame 130 during condensate ingress and backwashing, extending its service life. By setting up the lifting mechanism 140, the support frame 130 can be moved as a whole, which in turn drives the magnetic suction component 120 to move up and down inside the housing 110. This allows different functions to be achieved at different positions. For example, when it is in the lower position, it can filter condensate. When it is lifted to the upper position, it can move within a certain range in the upper position to fully backwash the magnetic suction components 120 on different layers, thus achieving the function of cleaning the magnetic suction components 120.

[0052] In one feasible implementation, the support frame 130 includes four support vertical beams and connecting horizontal beams at both ends of the support vertical beams. The support vertical beams and connecting horizontal beams form an integral frame. A grid frame is provided inside the integral frame, and the magnetic suction component 120 is disposed inside the grid frame.

[0053] The overall frame is also cubic in shape. The length and width of the cubic frame are fitted with the outer shell 110 with a gap. The height of the cubic frame must be able to accommodate the backwashing of each layer of magnetic components to ensure the reliability and effectiveness of the backwashing.

[0054] It should be noted that by using stainless steel plates to make a grid frame and inserting the magnetic components 120 into the grid, the stability of the magnetic components 120 can be improved, while ensuring the regularity of the arrangement of the magnetic components 120 and improving the stability of the magnetic field of the magnetic components 120.

[0055] Figure 3 This is a schematic diagram of a magnetic suction assembly according to an embodiment of the present invention; Figure 4 This is another schematic diagram of a magnetic suction assembly with the electromagnetic coil removed according to an embodiment of the present invention.

[0056] In one feasible implementation, such as Figure 3 and Figure 4 As shown, the magnetic attraction assembly 120 includes:

[0057] Permanent magnet rod 121 is set inside the grid frame, and the center distance between two adjacent permanent magnet rods 121 is 5mm;

[0058] Among them, three rows of permanent magnet rods 121 are arranged between the water inlet 111 and the water outlet 112, and the distance between two adjacent rows of permanent magnet rods 121 is 5mm. When facing the water inlet 111 or the water outlet 112, multiple rows of permanent magnet rods 121 are arranged, and the adjacent rows of permanent magnet rods 121 are staggered.

[0059] Viewed from the side of the shell 110, excluding the inlet 111 (outlet 112), as follows: Figure 3 The layer shown has multiple rows and three columns of permanent magnet rods 121, with adjacent columns of permanent magnet rods 121 spaced 5 cm apart. The number of rows (layers) of permanent magnet rods 121 is designed to cover the area along the length of the flow channel, thereby improving the adsorption of iron-containing particles in the condensate by the magnetic adsorption component 120. From this side, the multiple permanent magnet rods 121 form a rectangle. Viewed from the top of the outer casing 110 (on the side of the lifting mechanism 140), the multiple permanent magnet rods 121 form a rectangle. When facing the inlet 111 or the outlet 112, as... Figure 4 As shown, the permanent magnet rods 121 in two adjacent columns form an isosceles trapezoidal shape, that is, the permanent magnet rods 121 in two adjacent columns are staggered (slotted). The arrangement of the permanent magnet rods 121 in odd-numbered columns is the same, and the arrangement of the permanent magnet rods 121 in even-numbered columns is the same. When facing the inlet 111 or the outlet 112, the number of permanent magnet rods 121 and the permanent magnet rods 121 arranged in the length direction of the outer shell 110 together can cover 80% of the flow channel cross-section area to improve the adsorption of iron-containing particles in the condensate by the magnetic adsorption group 120.

[0060] It should be noted that there are three rows of permanent magnet rods 121 on the side of the housing 110 (the side formed between the inlet 111 and the outlet 112). Each row of permanent magnet rods 121 can be supported by two sets of grid frames, so that the entire permanent magnet rod 121 does not need to be supported by grid frames. This can reduce the workload of the lifting mechanism 140, thereby saving energy and improving work efficiency.

[0061] For example, the permanent magnet rod 121 is an N52 grade neodymium iron boron permanent magnet rod, that is, a permanent magnet rod with neodymium as the main rare earth element and a maximum magnetic energy product (BH)max of 52 MGOe (mega-goo). This makes the permanent magnet rod 121 have strong magnetic force at room temperature, with extremely high magnetic energy product and coercivity, which enables the filter device 100 to achieve the advantages of high performance, miniaturization and lightweight.

[0062] In one feasible implementation, the magnetic attraction assembly 120 further includes:

[0063] An electromagnetic coil 122 is located between the inlet 111 and the outlet 112. The electromagnetic coil 122 is positioned between two adjacent rows of permanent magnet rods 121. The electromagnetic coil 122 is supported by an aluminum core, which is fixedly connected to the support frame 130. The grid frame has a notch to facilitate the passage of the electromagnetic coil 122.

[0064] Among them, there are three rows of electromagnetic coils 122 between the inlet 111 and the outlet 112, and the three rows of electromagnetic coils 122 are arranged in parallel.

[0065] It should be noted that an electromagnetic coil 122 is provided between two adjacent permanent magnet rods 121 on the side of the housing 110 (the side formed between the inlet 111 and the outlet 112). That is, there are also three rows of electromagnetic coils 122. The current passing through each row of electromagnetic coils 122 is the same. The three rows of electromagnetic coils 122 are connected in parallel, that is, the current passing through the three rows of electromagnetic coils 122 can be different, and the current range is 0A to 50A. By placing electromagnetic coils 122 between adjacent permanent magnet rods 121, the magnetic field of the permanent magnet rods 121 can be enhanced. By passing different currents through the three electromagnetic coils 122, the magnetic attraction component 120 forms a gradient magnetic field: an inlet magnetic field strength of 0.5T, a central magnetic field strength of 1.2T, and an outlet magnetic field strength of 0.3T. The 0.5T magnetic field strength at the inlet helps to initially attract large iron-containing particles, the 1.2T magnetic field strength in the central part can attract submicron-sized iron-containing particles, such as 0.5μm to 1μm iron-containing particles, and the 0.3T magnetic field strength at the outlet is a magnetic field attenuation zone, which can reduce the shedding of iron-containing particles and ensure the reliability of iron-containing particle attraction. In other words, the magnetic attraction component 120 of this application can attract magnetic iron-containing particles with a particle size range of 0.5μm to 100μm in condensed water. It can be understood that the N-level and S-level formed by the electromagnetic coils 122 correspond to the permanent magnet rods 121 and can increase the magnetic field strength of the permanent magnets 121. The gradient magnetic field is formed by the cooperation of permanent magnet rod 121 and electromagnetic coil 122, and the arrangement of the spiral outer shell 110 inner wall and permanent magnet rod 121 can cover 80% of the flow channel, thereby increasing the rejection rate of iron-containing particles from 0.5μm to 1μm from the existing 50% to more than 95%, or even up to 98%, thus improving the filtration efficiency of condensate.

[0066] For example, when the magnetic assembly 120 needs to be backwashed, in order to facilitate the removal of iron-containing particles adsorbed on the permanent magnet rod 121, the N and S poles formed by the electromagnetic coil 122 are opposite to those of the permanent magnet rod 121. This weakens the magnetic field of the permanent magnet rod 121, thereby making it easier for the iron-containing particles on the permanent magnet rod 121 to be washed away. At this time, the N and S poles can be switched by simply changing the positive and negative poles of the electromagnetic coil 122, thereby weakening the magnetic field of the permanent magnet rod 121.

[0067] The electromagnetic coil 121 is supported by an aluminum core. The two ends of the aluminum core can be fixed to the grid frame of the support frame 130. The grid frame can be provided with notches to facilitate the passage of the aluminum core and the electromagnetic coil 122. The aluminum core can support the electromagnetic coil 122 and ensure the positional stability between the electromagnetic coil 122 and the permanent magnets 121 on both sides. On the other hand, it can also dissipate heat from the electromagnetic coil 122. When the backwashing device 210 washes, it can remove the heat from the electromagnetic coil 122, improve the service life of the electromagnetic coil 122, and extend the maintenance interval of the electromagnetic coil 122.

[0068] Figure 5 This is a schematic diagram of the track connection according to an embodiment of the present invention.

[0069] In one feasible implementation, such as Figure 5 As shown, the filter device 100 also includes:

[0070] Track 150, multiple tracks 150 are disposed inside the housing 110, the tracks 150 are sleeved on the support vertical beam, and the support vertical beam is movable within the tracks 150.

[0071] The track 150 is a hollow cylinder with an opening on one side. The hollow part facilitates the accommodation of the support beam. The track 150 allows the support frame 130 to move stably up and down. An infrared transmitter or receiver can be placed inside the track 150, and correspondingly, an infrared receiver or transmitter is placed at a corresponding position on the support beam. When the filter device 100 is in filtering function, the infrared transmitter and receiver are not powered and are in a non-working state. When the filter device 100 enters the backwashing function, the infrared transmitter and receiver are powered on and enter the working state. At this time, one infrared transmitter (receiver) on the support beam moves back and forth between two infrared receivers (transmitters) in the height direction within the track 150, which further improves the efficiency and reliability of washing away iron-containing particles on the magnetic suction assembly 120 during backwashing.

[0072] Understandably, since the electromagnetic coil 122 operates in a liquid environment, a waterproof electromagnetic coil 122 can be used. The opening on the track 150 prevents interference between the connecting beam and the track 150 when the support frame 130 moves, improving the smoothness of the movement of the support frame 130 within the track 150.

[0073] In one feasible embodiment, the support frame 130 further includes a pair of intersecting inclined beams, which are disposed on the side of the overall frame facing the lifting mechanism 140. The lifting mechanism 140 includes a hydraulic rod, the fixed section of which is fixedly disposed outside the housing 110, and the telescopic end of which is fixedly connected to the connection of the pair of inclined beams.

[0074] In order to facilitate the movement of the lifting mechanism 140 on the support frame 130 and the magnetic suction component 120 therein, a pair of inclined beams can be cross-set on the side of the overall frame facing the lifting mechanism 140. The connection point formed by the pair of beams is connected to the extension end of the hydraulic rod. The lifting mechanism 140 drives the support frame 130 and the magnetic suction component 120 to move together, so as to realize the filtration function and backwashing function of the filter device 100. The track 150 can ensure the stability and reliability of the overall movement.

[0075] In one feasible embodiment, the housing 110 is also provided with a backwash port 113 and a drain port 114, which are arranged on the same side. The housing 110 is also provided with a differential pressure sensor interface 115. The backwash port 113 is connected to the backwash device 210, and the differential pressure sensor 115 is connected to the backwash device 210 to transmit the differential pressure signal to the backwash device 210.

[0076] During the filtration process of the filter device 100, the adsorbed iron-containing particles occupy the area of ​​the flow channel, thus reducing the area of ​​the flow channel and increasing the pressure inside the filter device 100. At the same time, the accumulation of iron-containing particles forms a porous but dense structure, increasing the frictional resistance of the fluid flow, similar to a valve in a water pipe being gradually closed, which also increases the internal pressure of the filter device 100. Therefore, a differential pressure sensor is set to obtain the difference between the initial pressure and the pressure during the filtration process. When the difference reaches the set differential pressure, the inlet 111 on the outer shell 110 is closed first, and the outlet 112 is delayed in closing, so that the condensate can flow out as much as possible. Then, the lifting mechanism 140 is opened, which raises the support frame 130 and the magnetic suction component 120 to the backwash working position. Then, the backwash port 113 is opened, and the drain port 114 is opened with a delay. During the backwash process, the lifting mechanism 140 sequentially drives the support frame 130 and the magnetic suction component 120 to move back and forth within a certain range, improving the washing efficiency of the backwash. It is understandable that the differential pressure sensor is linked to the backwashing device 210 for control.

[0077] Figure 6 This is a schematic diagram of a filtration system according to an embodiment of the present invention.

[0078] like Figure 6 As shown, another embodiment of this utility model provides a filtration system for condensate in a thermal power plant. The filtration system 200 includes:

[0079] Such as the filter device 100 described above;

[0080] Backwashing device 210 is connected to filter device 100;

[0081] The heat exchange device 220 is connected to the filter device 100 and is located upstream of the inlet 111 of the filter device 100.

[0082] The filter device 100 improves the filtration efficiency for iron-containing particles in the condensate of thermal power plants, as detailed above. The backwash device 210 employs a combined air-water pulse backwash (nitrogen pressure 0.4 MPa, backwash water temperature 60±2℃), with a backwash cycle of 72 hours, saving 60% of water compared to traditional technologies. When the pressure difference within the filter device 100 exceeds the set pressure difference, the magnetic suction component 120 reciprocates, and the water flow washes away and traps iron-containing particles on the magnetic suction component. The backwash device 210 is existing technology and will not be described further.

[0083] It should be noted that the heat exchange device 220 reduces the temperature of the condensate entering the filter 100. After exiting the filter 100 (coarse treatment), the condensate needs to enter the resin adsorption system to adsorb residual dissolved iron ions and other possible heavy metal ions (fine treatment). Since the temperature of the condensate is usually between 70°C and 80°C, this can shorten the working life of the resin by 60%, requiring frequent resin replacement (three times a year), increasing maintenance costs by 2.5 million yuan per year. Therefore, the heat exchange device 220 is installed upstream of the inlet 111 of the filter 100 to allow heat exchange between the condensate and the return water from the heating network (temperature around 40°C), thereby reducing the temperature of the condensate entering the filter 100 and the resin adsorption system, extending the service life of the resin (replacement cycle is only once every two years), and reducing production and maintenance costs.

[0084] In one feasible implementation, the filtration system 200 includes two heat exchange devices 220, each heat exchange device 220 comprising:

[0085] The shell contains a titanium tube bellows. The shell has a first inlet, a second inlet, a first outlet, and a second outlet. The first inlet and the first outlet are both connected to the bellows. The second inlet and the second outlet are both connected to the space formed by the shell and the titanium tube bellows. The first inlet is connected to condensate or heat network return water, and the second inlet is connected to heat network return water or condensate.

[0086] Two sets of heat exchange devices 220 can be set up. In this embodiment, the first inlet is connected to the condensate, and the second inlet is connected to the return water of the heating network. The condensate first enters the first heat exchange device 220, and at the same time, the return water of the heating network enters the first heat exchange device 200. After heat exchange, the first outlet temperature of the condensate is refined to about 53°C, and the outlet temperature of the return water of the heating network reaches about 60°C, so as to recover waste heat. Then the condensate enters the second heat exchange device 220, and at the same time, the second heat exchange device 220 is also connected to the original return water of the heating network (about 40°C). After heat exchange, the second outlet temperature of the condensate can reach about 45°C. Finally, the temperature of the condensate that comes out after filtration by the filter device 100 can reach 45±2°C, which can effectively extend the service life of the resin in the resin adsorption system in the subsequent fine treatment, extend the resin replacement cycle, and reduce maintenance costs.

[0087] It should be noted that heat exchange device 220 is a titanium tube bellows heat exchanger. The valve opening is adjusted by a PLC controller and PID algorithm to ensure that the temperature entering the resin adsorption system (fine treatment) inlet does not exceed 50℃, so that the condensate temperature after passing through the first heat exchange device 220 drops to about 55℃, and the temperature of the condensate after passing through the second heat exchange device 220 can reach 45±2℃. This can be achieved by installing a temperature sensor at the outlet of the heat exchange device 220, which feeds back the temperature to the PLC and controls the opening of the condensate and heat network return water valves. If the outlet temperature is higher than the set temperature, the opening of the heat network return water inlet valve is increased, while the opening of the condensate inlet valve is decreased.

[0088] It is understood that since the filtration system 200 of this application includes the aforementioned filtration device 100, it also possesses all the advantages of the aforementioned filtration device 100, which will not be repeated here.

[0089] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0090] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0091] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A filtration device for condensate in thermal power plants, characterized in that, The filtration device includes: The outer casing has an inlet and an outlet oppositely arranged, and the inner wall of the outer casing is spiral-shaped. A magnetic suction component is disposed inside the housing, and the magnetic suction component is configured to adsorb iron-containing particles in the condensate. A support frame is disposed within the housing and is configured to support the magnetic assembly; A lifting mechanism is fixedly connected to the support frame, and the lifting mechanism is configured to drive the support frame to move within the housing.

2. The filtration device for condensate in thermal power plants according to claim 1, characterized in that, The support frame includes four vertical support beams and connecting horizontal beams at both ends of the vertical support beams. The vertical support beams and the connecting horizontal beams form an integral frame. A grid frame is provided inside the integral frame, and the magnetic suction component is provided inside the grid frame.

3. The filtration device for condensate in thermal power plants according to claim 2, characterized in that, The magnetic attraction component includes: A permanent magnet rod is disposed within the grid frame, and the center distance between two adjacent permanent magnet rods is 5mm; The system includes three rows of permanent magnet rods between the water inlet and the water outlet, with a spacing of 5mm between adjacent rows. When facing the water inlet or the water outlet, multiple rows of permanent magnet rods are provided, with adjacent rows of permanent magnet rods staggered.

4. The filtration device for condensate in thermal power plants according to claim 3, characterized in that, The magnetic attraction component also includes: An electromagnetic coil is located between the water inlet and the water outlet. The electromagnetic coil is positioned between two adjacent rows of permanent magnet rods. The electromagnetic coil is supported by an aluminum core, which is fixedly connected to the support frame. The grid frame has a notch to facilitate the passage of the electromagnetic coil. There are three rows of electromagnetic coils between the water inlet and the water outlet, and the three rows of electromagnetic coils are arranged in parallel.

5. The filtration device for condensate in thermal power plants according to claim 2, characterized in that, The support frame is made of stainless steel.

6. The filtration device for condensate in thermal power plants according to claim 2, characterized in that, The filtration device further includes: The track, multiple tracks are disposed within the housing, the track is fitted onto the supporting vertical beam, and the supporting vertical beam is movable within the track.

7. The filtration device for condensate in thermal power plants according to claim 2, characterized in that, The support frame also includes a pair of intersecting inclined beams, which are located on the side of the overall frame facing the lifting mechanism. The lifting mechanism includes a hydraulic rod, the fixed section of which is fixedly located outside the housing, and the telescopic end of which is fixedly connected to the connection point of the pair of inclined beams.

8. The filtration device for condensate in a thermal power plant according to any one of claims 1 to 7, characterized in that, The housing is also provided with a backwash port and a drain port, which are located on the same side. The housing is also provided with a differential pressure sensor interface. The backwash port is connected to the backwash device, and the differential pressure sensor is connected to the backwash device to transmit the differential pressure signal to the backwash device.

9. A filtration system for condensate in a thermal power plant, characterized in that, The filtration system includes: The filtration device as described in any one of claims 1 to 8; A backwashing device is connected to the filter device; A heat exchange device is connected to the filter device, and the heat exchange device is located upstream of the water inlet of the filter device.

10. The filtration system for condensate in a thermal power plant according to claim 9, characterized in that, The filtration system includes two heat exchange devices, each heat exchange device comprising: The housing includes a titanium tube bellows disposed within the housing. The housing has a first inlet, a second inlet, a first outlet, and a second outlet. The first inlet and the first outlet are both connected to the bellows. The second inlet and the second outlet are both connected to the space formed by the housing and the titanium tube bellows. The first inlet is connected to condensate or heat network return water, and the second inlet is connected to heat network return water or the condensate.

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