Evaporated condensate water impurity on-line separation recovery and purification device

Abstract

The application discloses an evaporated condensate water impurity online separation and recovery purifying device, and belongs to the technical field of sewage treatment. The device comprises a temporary storage tank and a filter tank. The side of the temporary storage tank is provided with an inlet pipe, and the side of the filter tank is provided with a liquid outlet pipe. A through opening is arranged between the temporary storage tank and the filter tank, and the top of the through opening is movably blocked by a sealing plug. The through opening is arranged between the temporary storage tank and the filter tank, and the top of the through opening is movably blocked by a sealing plug. The opening and closing of the sealing plug are automatically controlled by a lifting mechanism according to the internal pressure change of the temporary storage tank. The condensate water in the temporary storage tank is discharged into the filter tank at high speed and intermittently under high pressure through the through opening. The pulse impact force of the high-pressure water flow directly acts on the impeller end face inside the filter tank, drives the centrifugal disc to rotate at high speed, and makes the condensate water complete solid-liquid separation under the action of the centrifugal field. The filtration rate during use is improved, and the working condition requirement of the evaporation crystallization system is met.

Description

Technical Field

[0001] This invention relates to a recycling and purification device, and more particularly to an online separation, recycling, and purification device for impurities in evaporative condensate, belonging to the field of wastewater treatment technology. Background Technology

[0002] In the evaporation crystallization process of wastewater treatment, a large amount of evaporation condensate is generated. In order to realize the cascade utilization of water resources, existing treatment processes are generally equipped with online purification and recovery devices. The core solid-liquid separation components mostly adopt fixed metal sintered filter screens or precision filter elements to intercept trace amounts of crystallized salt nuclei, suspended particles and some coking organic matter introduced by mist entrainment during the evaporation process.

[0003] However, the small amount of surfactants and volatile organic compounds remaining in the wastewater will be carried away with the steam during the evaporation process. After condensation, they will form adhesive organic colloids, which are very easy to deposit on the filter screen surface to form a complex pollution layer. This will cause the filter screen filtration channel to become severely blocked in a short time, affecting the continuous use of the equipment. In addition, the filtration rate of the filter cartridge is low, which is difficult to match the high load requirements of the evaporation system for continuous water production.

[0004] To address this issue, an online separation, recovery, and purification device for impurities in evaporative condensate was designed. Summary of the Invention

[0005] The main objective of this invention is to provide an online separation, recovery, and purification device for impurities in evaporative condensate, in order to solve the problems mentioned in the background art.

[0006] The objective of this invention can be achieved by adopting the following technical solution: An online separation, recovery and purification device for impurities in evaporative condensate includes a storage tank and a filter tank. The storage tank has an inlet pipe on its side, and the filter tank has a drain pipe on its side. A passage is provided between the storage tank and the filter tank. A sealing plug is movably sealed at the top of the passage. A lifting mechanism is provided inside the storage tank. The lifting mechanism is connected to the sealing plug and is used to control the opening and closing of the sealing plug according to the pressure change inside the storage tank. The filter tank has a rotating shaft inside, and an impeller is fixedly installed at the top of the shaft. The impeller is located directly below the guide port. A centrifugal disc is fixedly installed on the outside of the shaft, and a centrifugal filter cartridge is installed on the outside of the centrifugal disc. The centrifugal filter cartridge is equipped with a scraper inside. The scraper is attached to the inner wall of the centrifugal filter cartridge. The scraper is linked to the lifting mechanism through the connecting rod and crossbar. It is used to slide up and down along the inner wall of the centrifugal filter cartridge when the sealing plug is opened or closed to scrape off the impurities attached to the inner wall of the centrifugal filter cartridge. The temporary storage tank is equipped with a pressure relief mechanism to release the pressure inside the tank after the condensate is drained.

[0007] Preferably, the lifting mechanism includes a first cylinder, a first slide rod, a first magnetic block, a second magnetic block, a pressure block, a second cylinder, a piston, a return spring, a support plate, a pressure rod, and a strip groove; The first cylinder is fixedly installed on the top of the temporary storage tank. The first sliding rod is vertically slidably installed inside the first cylinder. The bottom end of the first sliding rod passes through the bottom wall of the first cylinder and extends out. The bottom end of the first sliding rod is fixedly connected to the sealing plug. The first magnetic block is fixedly installed at the top of the first slide rod, and the second magnetic block is fixedly installed at the top of the inside of the first cylinder. The first magnetic block and the second magnetic block are arranged opposite to each other and attract each other. The second cylinder is located on top of the temporary storage tank and communicates with the inside of the temporary storage tank. The piston is slidably located inside the second cylinder. A return spring is abutted between the piston and the inner end face of the second cylinder. The support plate is fixedly installed on the top of the piston, and a pressure rod is fixedly installed on the top of the support plate. The pressure block is fixedly installed on the top of the first slide rod and located below the first magnetic block. The pressure rod extends into the interior of the first cylinder body. The sides of the first cylinder body and the second cylinder body are provided with strip grooves that cooperate with the pressure rod. In the initial state, the pressure rod is in contact with the top of the pressure block, and the sealing plug blocks the top of the guide port.

[0008] Preferably, one end of the crossbar is fixedly connected to the first sliding rod, the other end of the crossbar is fixedly connected to the top of the connecting rod, and the bottom end of the connecting rod slides through the bottom wall of the temporary storage tank and is fixedly connected to the scraper.

[0009] Preferably, the pressure relief mechanism includes a pressure relief hole, a second sliding rod, a float, a guide rod, and a mesh cover; The pressure relief hole is located at the top of the temporary storage tank. The second sliding rod is vertically slidably installed inside the pressure relief hole. The outer diameter of the second sliding rod is the same as the inner diameter of the pressure relief hole. A guide rod is fixed at the top of the second sliding rod. The outer diameter of the guide rod is smaller than the inner diameter of the pressure relief hole. In the initial state, the guide rod is located inside the pressure relief hole. The bottom end of the second sliding rod is fixedly connected to the float, which floats on the surface of the condensate inside the temporary storage tank. The top of the temporary storage tank is equipped with a mesh cover directly above the pressure relief hole.

[0010] Preferably, a drain valve is provided at the bottom of the filter tank corresponding to the lower part of the centrifugal filter cartridge. The drain valve is used to periodically discharge impurities trapped inside the centrifugal filter cartridge.

[0011] Preferably, a wire mesh demister is installed at the top of the interior of the temporary storage tank, and the wire mesh demister has sliding holes that cooperate with the lifting mechanism and the pressure relief mechanism.

[0012] Preferably, the surface of the centrifuge disc is provided with paddles, which are distributed at intervals along the circumference of the centrifuge disc.

[0013] Preferably, the bottom of the filter tank is uniformly fixed with legs along the circumference, and the bottom of each leg is provided with an anti-slip pad.

[0014] Preferably, the liquid inlet pipe is connected to the condensate outlet of the evaporation crystallization system, and the liquid outlet pipe is connected to the recovery water tank.

[0015] The beneficial effects of this invention are as follows: This invention provides an online separation, recovery, and purification device for impurities in evaporative condensate. A passageway is provided between a temporary storage tank and a filter tank, with a sealing plug movable at the top of the passageway. A lifting mechanism automatically controls the opening and closing of the sealing plug based on pressure changes inside the temporary storage tank. This allows the condensate in the temporary storage tank to be discharged at high speed and intermittently into the filter tank under high pressure through the passageway. The pulse impact force of the high-pressure water flow directly acts on the impeller end face inside the filter tank, driving the centrifugal disc to rotate at high speed. This allows the condensate to complete solid-liquid separation under centrifugal force, improving the filtration rate during use and adapting to the operating conditions of evaporative crystallization systems. By installing a scraper that can slide up and down inside the centrifugal filter cartridge, the scraper is mechanically linked to the lifting mechanism through a connecting rod and a crossbar. When the sealing plug is opened or closed with the movement of the lifting mechanism, the scraper slides up and down along the inner wall of the centrifugal filter cartridge in real time, scraping off the contaminant layer attached to the inner wall of the filter cartridge. This ensures that the centrifugal filter cartridge maintains good permeability during long-term operation and extends the service life of the filter material. The lifting mechanism consists of a first cylinder, a first slide rod, a first magnetic block, a second magnetic block, a pressure block, a second cylinder, a piston, a return spring, a support plate, a pressure rod, and a strip groove. This mechanism relies entirely on the pressure change of the condensate inside the inlet pipe as the driving force. When the pressure inside the inlet pipe reaches the set threshold, the first slide rod is automatically raised and the sealing plug is opened, allowing the condensate in the storage tank to be discharged quickly under high pressure, ensuring the impact kinetic energy required for centrifugal filtration. When the condensate in the storage tank is discharged and the pressure drops below the set value, the lifting mechanism automatically resets, the sealing plug re-seals the passage, and the storage tank enters the next pressure storage cycle. The entire control process does not require any external power supply, improving the operational reliability and environmental adaptability of the device. A pressure relief mechanism consisting of a pressure relief hole, a second sliding rod, a float, and a guide rod is installed on the temporary storage tank. This mechanism automatically controls the opening and closing of the pressure relief hole according to the liquid level change of the condensate inside the storage tank. When the condensate level rises, the float rises with the liquid level and drives the second sliding rod through the guide rod to keep the pressure relief hole sealed, ensuring that the temporary storage tank can build up high pressure normally. The pressure relief hole only opens automatically to relieve pressure after a single condensate discharge and the liquid level drops to the set position, so as to balance the pressure difference inside and outside the temporary storage tank and avoid equipment damage due to excessive pressure. This pressure relief mechanism also adopts a purely mechanical liquid level linkage mode to ensure that the device is always in a safe and controllable operating state during the cyclic operation. Attached Figure Description

[0016] Figure 1 This is a partial cross-sectional view of the overall structure of the present invention; Figure 2 This is a bottom view of the overall structure of the present invention; Figure 3 This is a half-sectional schematic diagram of the overall structure of the present invention; Figure 4 This is a schematic diagram of the structure on the first sliding rod of the present invention; Figure 5 This is a cross-sectional schematic diagram of the top structure of the temporary storage tank of the present invention; Figure 6 This is a top view of the interior of the filter tank of the present invention; Figure 7 This is a partial schematic diagram of the pressure relief structure of the present invention.

[0017] In the diagram: 1. Temporary storage tank; 2. Inlet pipe; 3. Filter tank; 4. Drain pipe; 5. Through port; 6. Sealing plug; 7. Lifting mechanism; 701. First cylinder; 702. First slide rod; 703. First magnetic block; 704. Second magnetic block; 705. Pressing block; 706. Second cylinder; 707. Piston; 708. Return spring; 709. Support plate; 710. Pressing rod; 711. Strip groove; 8. Pressure relief mechanism; 801. Pressure relief hole; 802. Second sliding rod; 803. Float; 804. Guide rod; 805. Net cover; 9. Centrifugal filter cartridge; 10. Rotary shaft; 11. Impeller; 12. Centrifugal disc; 13. Paddle; 14. Drain valve; 15. Wire mesh demister; 16. Crossbar; 17. Connecting rod; 18. Scraper. Detailed Implementation

[0018] To enable those skilled in the art to more clearly understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0019] Example 1: As Figures 1-7 As shown, this embodiment provides an online separation, recovery and purification device for impurities in evaporative condensate, including a temporary storage tank 1 and a filter tank 3. The temporary storage tank 1 is provided with an inlet pipe 2 on its side, and the filter tank 3 is provided with a drain pipe 4 on its side. A guide port 5 is provided between the temporary storage tank 1 and the filter tank 3. A sealing plug 6 is movably sealed at the top of the guide port 5. A lifting mechanism 7 is provided inside the temporary storage tank 1. The lifting mechanism 7 is connected to the sealing plug 6 and is used to control the opening and closing of the sealing plug 6 according to the pressure change inside the temporary storage tank 1. The filter tank 3 has a rotating shaft 10 inside, and an impeller 11 is fixedly installed at the top of the shaft 10. The impeller 11 is located directly below the guide port 5. A centrifugal disc 12 is fixedly installed on the outside of the shaft 10, and a centrifugal filter cartridge 9 is installed on the outside of the centrifugal disc 12. The centrifugal filter cartridge 9 is provided with a scraper 18 inside. The scraper 18 is attached to the inner wall of the centrifugal filter cartridge 9. The scraper 18 is linked with the lifting mechanism 7 through the connecting rod 17 and the crossbar 16. It is used to slide up and down along the inner wall of the centrifugal filter cartridge 9 when the sealing plug 6 is opened or closed, and scrape off the impurities attached to the inner wall of the centrifugal filter cartridge 9. The temporary storage tank 1 is equipped with a pressure relief mechanism 8, which is used to relieve pressure inside the temporary storage tank 1 after the condensate is discharged.

[0020] The high-temperature condensate generated by the evaporation and crystallization system is continuously fed into the temporary storage tank 1 through the inlet pipe 2. As the condensate is continuously injected, the liquid level inside the temporary storage tank 1 gradually rises, the gas space in the upper part of the tank is compressed, and the pressure continues to rise. When the pressure inside the temporary storage tank 1 reaches the set action threshold of the lifting mechanism 7, the lifting mechanism 7 drives the sealing plug 6 to open upwards, the guide port 5 opens, and the high-pressure condensate inside the temporary storage tank 1 is driven by the gas pressure inside the tank and sprayed downwards at high speed through the guide port 5.

[0021] The high-speed discharged condensate impacts the blades of the impeller 11, located directly below the guide port 5, with tremendous force, driving the impeller 11 and the shaft 10 fixedly connected to it to rotate at high speed. The shaft 10 drives the centrifugal disc 12, which is fixedly installed on its outer side, to rotate synchronously. The condensate entering the filter tank 3 generates a high-speed centrifugal force field under the action of the centrifugal disc 12. Under the action of centrifugal force, the denser solid impurities in the condensate are thrown towards the inner wall of the centrifugal filter cartridge 9 and trapped on the inner wall of the centrifugal filter cartridge 9, while the purified condensate flows through the filter holes of the centrifugal filter cartridge 9 into the interior of the filter tank 3, and is finally discharged to the recovery water tank through the drain pipe 4, realizing the online separation, recovery and purification of condensate.

[0022] When the sealing plug 6 is opened, the movement of the lifting mechanism 7 is simultaneously transmitted to the scraper 18 via the crossbar 16 and connecting rod 17, driving the scraper 18 to slide upward along the inner wall of the centrifugal filter cylinder 9. When the condensate inside the temporary storage tank 1 is discharged to the set liquid level, the pressure inside the tank drops, the lifting mechanism 7 automatically resets, the sealing plug 6 re-seals the guide port 5, and the temporary storage tank 1 re-enters the pressurization state. At the same time, the scraper 18 slides downward along the inner wall of the centrifugal filter cylinder 9 as the lifting mechanism 7 resets, scraping off the impurities adhering to the inner wall of the centrifugal filter cylinder 9, causing the impurities to fall to the bottom of the centrifugal filter cylinder 9, completing a complete cleaning cycle.

[0023] After the condensate in the temporary storage tank 1 has been completely drained, the pressure relief mechanism 8 automatically opens to release pressure inside the tank, balancing the pressure difference between the inside and outside of the tank and preventing damage to the equipment due to excessive pressure. The temporary storage tank 1 then enters the next cycle of pressure storage, drainage, filtration, and pressure relief. The entire device relies entirely on the pressure and level changes of the condensate as its driving force, requiring no external power supply or electrical control components, achieving fully automated online separation, recovery, and purification.

[0024] Example 2: The solution in Example 1 will be further described below with reference to its specific working method. See the description below for details: In this embodiment, the lifting mechanism 7 includes a first cylinder 701, a first slide rod 702, a first magnetic block 703, a second magnetic block 704, a pressure block 705, a second cylinder 706, a piston 707, a return spring 708, a support plate 709, a pressure rod 710, and a strip groove 711. The first cylinder 701 is fixedly installed on the top of the temporary storage tank 1. The first slide rod 702 is vertically slidably disposed inside the first cylinder 701. The bottom end of the first slide rod 702 penetrates through the bottom wall of the first cylinder 701 and extends out. The bottom end of the first slide rod 702 is fixedly connected to the sealing plug 6. The first magnetic block 703 is fixedly installed on the top of the first slide rod 702, and the second magnetic block 704 is fixedly installed on the top of the inside of the first cylinder 701. The first magnetic block 703 and the second magnetic block 704 are arranged opposite to each other and attract each other. The second cylinder 706 is located on the top of the temporary storage tank 1 and is in communication with the inside of the temporary storage tank 1. The piston 707 is slidably located inside the second cylinder 706. A return spring 708 abuts between the piston 707 and the inner end face of the second cylinder 706. The support plate 709 is fixedly installed on the top of the piston 707. A pressure rod 710 is fixedly installed on the top of the support plate 709. The pressure block 705 is fixedly installed on the top of the first slide rod 702 and located below the first magnetic block 703. The pressure rod 710 extends into the interior of the first cylinder 701. The first cylinder 701 and the second cylinder 706 have strip grooves 711 that cooperate with the pressure rod 710 on their sides. In the initial state, the pressure rod 710 is in contact with the top of the pressure block 705, and the sealing plug 6 blocks the top of the guide port 5.

[0025] In the initial state, the internal pressure of the temporary storage tank 1 is low, the first magnetic block 703 and the second magnetic block 704 are separated, and the sealing plug 6 fixed to the bottom of the first sliding rod 702 seals the top of the guide port 5. At this time, the bottom of the pressure rod 710 abuts against the top of the pressure block 705, and the sealing plug 6 is in the closed state.

[0026] As liquid continuously enters the temporary storage tank 1 and the pressure gradually increases, the air pressure inside the temporary storage tank 1 acts on the lower end face of the piston 707 in the second cylinder 706, overcoming the elastic force of the return spring 708 and pushing the piston 707 upward. The piston 707 drives the support plate 709 and the pressure rod 710 fixed to the top of the support plate 709 to rise synchronously. The pressure rod 710 slides upward along the strip groove 711, separating from the pressure block 705. The top of the pressure rod 710 directly contacts the bottom of the first magnetic block 703 and applies an upward thrust, pushing the first magnetic block 703 towards the second magnetic block 704 until the two are attracted. The first sliding rod 702 remains in the upward position under the action of magnetic attraction, the sealing plug 6 remains open, the guide port 5 remains open, and the high-pressure condensate inside the temporary storage tank 1 is continuously discharged through the guide port 5.

[0027] When the condensate inside the temporary storage tank 1 is discharged to the set liquid level, the pressure inside the tank drops. At this time, the air pressure on the lower end face of the piston 707 inside the second cylinder 706 decreases, the return spring 708 releases its elastic potential energy, and pushes the piston 707 to return downward. The piston 707 drives the support plate 709 and the pressure rod 710 to move downward. During the downward movement of the pressure rod 710, it first separates from the first magnetic block 703, continues to move downward until it contacts the top of the pressure block 705 again, and then applies a downward pushing force to the pressure block 705, overcoming the magnetic attraction between the first magnetic block 703 and the second magnetic block 704, pushing the pressure block 705 and the first sliding rod 702 to return downward, and the sealing plug 6 re-seals the passage 5.

[0028] During the rising and falling of the first slide rod 702, the crossbar 16 moves synchronously with the first slide rod 702, and drives the scraper 18 to slide up and down along the inner wall of the centrifugal filter cylinder 9 through the connecting rod 17, thereby realizing online self-cleaning of the inner wall of the centrifugal filter cylinder 9.

[0029] In this embodiment, one end of the crossbar 16 is fixedly connected to the first sliding rod 702, and the other end of the crossbar 16 is fixedly connected to the top end of the connecting rod 17. The bottom end of the connecting rod 17 slides through the bottom wall of the temporary storage tank 1 and is fixedly connected to the scraper 18.

[0030] When the first slide rod 702 rises under the drive of the lifting mechanism 7, the crossbar 16 fixedly connected to the first slide rod 702 also rises. The crossbar 16 drives the connecting rod 17 to move upward synchronously, and the bottom end of the connecting rod 17 pulls the scraper 18 to slide upward along the inner wall of the centrifugal filter cylinder 9.

[0031] When the sealing plug 6 is closed and the first slide rod 702 is reset and descended, the crossbar 16 moves downwards accordingly, and pushes the scraper 18 down along the inner wall of the centrifugal filter cylinder 9 through the connecting rod 17, pushing the scraped impurities to the bottom of the centrifugal filter cylinder 9.

[0032] The scraper 18 completes a full up-and-down reciprocating slide in each cycle of opening and closing the sealing plug 6, ensuring that a stable contamination layer does not form on the inner wall of the centrifugal filter cartridge 9 and maintaining the good permeability of the centrifugal filter cartridge 9.

[0033] In this embodiment, the pressure relief mechanism 8 includes a pressure relief hole 801, a second sliding rod 802, a float 803, a guide rod 804, and a mesh cover 805; The pressure relief hole 801 is opened at the top of the temporary storage tank 1. The second slide rod 802 is vertically slidably disposed in the pressure relief hole 801. The outer diameter of the second slide rod 802 is the same as the inner diameter of the pressure relief hole 801. A guide rod 804 is fixed at the top of the second slide rod 802. The outer diameter of the guide rod 804 is smaller than the inner diameter of the pressure relief hole 801. In the initial state, the guide rod 804 is located inside the pressure relief hole 801. The bottom end of the second sliding rod 802 is fixedly connected to the float 803, and the float 803 floats on the surface of the condensate liquid inside the temporary storage tank 1. A mesh cover 805 is provided on the top of the temporary storage tank 1, directly above the pressure relief hole 801, to protect the top of the guide rod 804 and prevent foreign objects from obstructing the raising and lowering of the guide rod 804.

[0034] As liquid enters the temporary storage tank 1 and the liquid level gradually rises, the float 803 rises synchronously with the liquid level. The float 803 drives the second sliding rod 802, which is fixedly connected to its top, to slide upwards within the pressure relief hole 801. The guide rod 804, fixed to the top of the second sliding rod 802, moves upwards and gradually extends out of the pressure relief hole 801. Since the outer diameter of the guide rod 804 is smaller than the inner diameter of the pressure relief hole 801, the annular flow area of ​​the pressure relief hole 801 gradually decreases as the guide rod 804 gradually extends out of the pressure relief hole 801. When the liquid level rises to the set height, the second sliding rod 802 completely slides into the pressure relief hole 801, and its outer wall forms a sealing fit with the inner wall of the pressure relief hole 801, completely sealing the pressure relief hole 801 and ensuring that high pressure can be normally established inside the temporary storage tank 1 to drive the subsequent centrifugal filtration process.

[0035] When the condensate in the temporary storage tank 1 is completely drained and the liquid level drops, the float 803 descends synchronously with the liquid level. The float 803 drives the second sliding rod 802 to slide downwards, gradually retracting from the pressure relief hole 801. The annular flow area of ​​the pressure relief hole 801 gradually increases, allowing external air to enter the temporary storage tank 1 through the pressure relief hole 801, relieving pressure and balancing the pressure difference between the inside and outside of the tank. When the liquid level drops to the lowest position, the guide rod 804 completely retracts into the pressure relief hole 801, fully opening the pressure relief hole 801 and allowing complete communication between the inside of the temporary storage tank 1 and the external atmosphere.

[0036] The pressure relief mechanism 8 relies entirely on the liquid level change of the condensate inside the temporary storage tank 1 to automatically control the opening and closing of the pressure relief hole 801, without the need for any external control components, thus achieving precise matching with the timing of the lifting mechanism 7.

[0037] In this embodiment, a drain valve 14 is provided at the bottom of the filter tank 3 corresponding to the lower part of the centrifugal filter cartridge 9. The drain valve 14 is used to periodically discharge impurities trapped inside the centrifugal filter cartridge 9.

[0038] When the device has been running for a period of time and the amount of impurities accumulated at the bottom of the centrifugal filter cartridge 9 reaches a certain level, the operator can open the drain valve 14 to discharge the accumulated impurities from the bottom of the centrifugal filter cartridge 9, ensuring the effective filtration space inside the centrifugal filter cartridge 9 and maintaining the long-term stable operation of the device.

[0039] In this embodiment, a wire mesh demister 15 is provided at the top of the interior of the temporary storage tank 1 to capture and intercept tiny droplets entrained in the airflow, preventing droplets from splashing to the outside of the temporary storage tank 1 through the pressure relief hole 801 or other gaps, thus ensuring a clean operating environment for the equipment. The wire mesh demister 15 is provided with sliding holes that cooperate with the lifting mechanism 7 and the pressure relief mechanism 8 to ensure that the operation of the lifting mechanism 7 and the pressure relief mechanism 8 is not interfered with by the wire mesh demister 15.

[0040] In this embodiment, the surface of the centrifuge disc 12 is provided with paddles 13, which are distributed at intervals along the circumference of the centrifuge disc 12.

[0041] The agitator 13 stirs and diverts the condensate entering the filter tank 3, enhancing the disturbance effect of the condensate inside the centrifugal filter cartridge 9, promoting the migration and deposition of solid impurities in the condensate to the inner wall of the centrifugal filter cartridge 9, and improving the centrifugal separation efficiency.

[0042] In this embodiment, the bottom of the filter tank 3 is uniformly fixed with legs along the circumference, and the bottom of each leg is provided with an anti-slip pad.

[0043] To prevent displacement or overturning of the device due to vibration generated by the high-speed rotation of the centrifugal disc 12 during operation, and to ensure the safe operation of the device.

[0044] In this embodiment, the liquid inlet pipe 2 is connected to the condensate outlet of the evaporation crystallization system, and the liquid outlet pipe 4 is connected to the recovery water tank.

[0045] The condensate generated by the evaporation crystallization system is continuously fed into the temporary storage tank 1 through the condensate outlet and the liquid inlet pipe 2, realizing online continuous water intake for the device. The condensate purified by centrifugal filtration passes through the centrifugal filter cartridge 9 and is collected inside the filter tank 3, and is continuously discharged to the recovery water tank through the drain pipe 4, realizing online recovery of the purified condensate.

[0046] The solutions in Embodiment 1 and Embodiment 2 will be further described below with reference to their specific working methods. During operation, the high-temperature condensate generated by the evaporation and crystallization system is continuously fed into the temporary storage tank 1 through the inlet pipe 2. The temporary storage tank 1 is sealed and pressurized, and the rising liquid level causes the gas pressure inside the tank to gradually increase. The float 803 rises with the liquid level and gradually seals the pressure relief hole 801 through the second sliding rod 802, ensuring that the temporary storage tank 1 is sealed.

[0047] When the pressure inside the tank reaches the set threshold, the air pressure pushes the piston 707 in the second cylinder 706 upward, which in turn drives the pressure rod 710 upward through the support plate 709. The pressure rod 710 separates from the pressure block 705 as it moves upward, and its top end directly contacts the bottom of the first magnetic block 703, pushing the first magnetic block 703 to attract the second magnetic block 704. The sealing plug 6 opens and maintains its opening, and the first sliding rod 702 moves upward, causing the sealing plug 6 to open the guide port 5. High-pressure condensate is sprayed downward at high speed through the guide port 5, impacting the impeller 11 and driving the rotating shaft 10 and centrifugal disc 12 to rotate at high speed. Under the action of centrifugal force, the condensate completes solid-liquid separation: impurities are trapped on the inner wall of the centrifugal filter cartridge 9, and purified water is discharged through the filter holes and the drain pipe 4.

[0048] When the sealing plug 6 is opened, the first sliding rod 702 drives the scraper 18 to slide up the inner wall of the centrifugal filter cylinder 9 through the crossbar 16 and the connecting rod 17, scraping off the attached impurities.

[0049] When the condensate is discharged to the set level and the pressure inside the tank drops, the reset spring 708 pushes the piston 707 to reset, and the pressure rod 710 descends, first separating from the first magnetic block 703, and continuing to descend until it re-contacts the top of the pressure block 705, then pushing the pressure block 705 and the first sliding rod 702 to reset, and the sealing plug 6 re-seals the guide port 5. The scraper 18 then slides down, pushing impurities to the bottom of the centrifugal filter cartridge 9. At the same time, the float 803 descends, the pressure relief hole 801 opens to release pressure, and the air pressure inside and outside the tank is balanced.

[0050] The above description is merely a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope disclosed in the present invention, based on the technical solution and concept of the present invention, shall fall within the scope of protection of the present invention.

Claims

1. An online separation, recovery, and purification device for impurities in evaporative condensate, comprising a temporary storage tank (1) and a filter tank (3), characterized in that: A liquid inlet pipe (2) is provided on the side of the temporary storage tank (1), a liquid drain pipe (4) is provided on the side of the filter tank (3), a guide port (5) is provided between the temporary storage tank (1) and the filter tank (3), a sealing plug (6) is movably sealed on the top of the guide port (5), a lifting mechanism (7) is provided inside the temporary storage tank (1), the lifting mechanism (7) is connected to the sealing plug (6) for transmission, and is used to control the opening and closing of the sealing plug (6) according to the pressure change inside the temporary storage tank (1); The filter tank (3) is equipped with a rotating shaft (10) inside. An impeller (11) is fixedly installed at the top of the rotating shaft (10). The impeller (11) is located directly below the guide port (5). A centrifugal disc (12) is fixedly installed on the outside of the rotating shaft (10). A centrifugal filter cartridge (9) is installed on the outside of the centrifugal disc (12). The centrifugal filter cartridge (9) is equipped with a scraper (18) inside. The scraper (18) is attached to the inner wall of the centrifugal filter cartridge (9). The scraper (18) is linked with the lifting mechanism (7) through the connecting rod (17) and the crossbar (16). It is used to slide up and down along the inner wall of the centrifugal filter cartridge (9) when the sealing plug (6) is opened or closed, and scrape off the impurities attached to the inner wall of the centrifugal filter cartridge (9). The temporary storage tank (1) is equipped with a pressure relief mechanism (8) for relieving pressure inside the temporary storage tank (1) after the condensate is discharged.

2. The online separation, recovery, and purification device for impurities in evaporative condensate according to claim 1, characterized in that: The lifting mechanism (7) includes a first cylinder (701), a first slide rod (702), a first magnetic block (703), a second magnetic block (704), a pressure block (705), a second cylinder (706), a piston (707), a return spring (708), a support plate (709), a pressure rod (710), and a strip groove (711). The first cylinder (701) is fixedly installed on the top of the temporary storage tank (1), and the first slide rod (702) is vertically slidably installed inside the first cylinder (701). The bottom end of the first slide rod (702) penetrates the bottom wall of the first cylinder (701) and extends out. The bottom end of the first slide rod (702) is fixedly connected to the sealing plug (6). The first magnetic block (703) is fixedly installed on the top of the first slide rod (702), and the second magnetic block (704) is fixedly installed on the top of the inside of the first cylinder (701). The first magnetic block (703) and the second magnetic block (704) are arranged opposite to each other and attract each other. The second cylinder (706) is located on the top of the temporary storage tank (1) and communicates with the inside of the temporary storage tank (1). The piston (707) is slidably located inside the second cylinder (706). A return spring (708) abuts between the piston (707) and the inner end face of the second cylinder (706). The support plate (709) is fixedly installed on the top of the piston (707). A pressure rod (710) is fixedly installed on the top of the support plate (709). The pressure block (705) is fixedly installed on the top of the first slide rod (702) and located below the first magnetic block (703). The pressure rod (710) extends into the interior of the first cylinder (701). The first cylinder (701) and the second cylinder (706) have strip grooves (711) that cooperate with the pressure rod (710) on their sides. In the initial state, the pressure rod (710) is attached to the top of the pressure block (705), and the sealing plug (6) blocks the top of the guide port (5).

3. The online separation, recovery, and purification device for impurities in evaporative condensate according to claim 2, characterized in that: One end of the crossbar (16) is fixedly connected to the first sliding rod (702), and the other end of the crossbar (16) is fixedly connected to the top of the connecting rod (17). The bottom end of the connecting rod (17) slides through the bottom wall of the temporary storage tank (1) and is fixedly connected to the scraper (18).

4. The online separation, recovery, and purification device for impurities in evaporative condensate according to claim 1, characterized in that: The pressure relief mechanism (8) includes a pressure relief hole (801), a second sliding rod (802), a float (803), a guide rod (804), and a mesh cover (805); A pressure relief hole (801) is opened at the top of the temporary storage tank (1). A second sliding rod (802) is vertically slidably installed inside the pressure relief hole (801). The outer diameter of the second sliding rod (802) is the same as the inner diameter of the pressure relief hole (801). A guide rod (804) is fixed at the top of the second sliding rod (802). The outer diameter of the guide rod (804) is smaller than the inner diameter of the pressure relief hole (801). In the initial state, the guide rod (804) is located inside the pressure relief hole (801). The bottom end of the second sliding rod (802) is fixedly connected to the float (803), and the float (803) floats on the surface of the condensate liquid inside the temporary storage tank (1); The top of the temporary storage tank (1) is equipped with a mesh cover (805) directly above the pressure relief hole (801).

5. The online separation, recovery, and purification device for impurities in evaporative condensate according to claim 1, characterized in that: A drain valve (14) is provided at the bottom of the filter tank (3) corresponding to the lower part of the centrifugal filter cylinder (9). The drain valve (14) is used to periodically discharge the impurities trapped inside the centrifugal filter cylinder (9).

6. The online separation, recovery, and purification device for impurities in evaporative condensate according to claim 1, characterized in that: The top of the interior of the temporary storage tank (1) is equipped with a wire mesh demister (15), and the wire mesh demister (15) has a sliding hole that cooperates with the lifting mechanism (7) and the pressure relief mechanism (8).

7. The online separation, recovery, and purification device for impurities in evaporative condensate according to claim 1, characterized in that: The surface of the centrifuge disc (12) is provided with paddles (13), which are distributed at intervals along the circumference of the centrifuge disc (12).

8. The online separation, recovery, and purification device for impurities in evaporative condensate according to claim 1, characterized in that: The bottom of the filter tank (3) is uniformly fixed with legs along the circumference, and the bottom of each leg is provided with an anti-slip pad.

9. The online separation, recovery, and purification device for impurities in evaporative condensate according to claim 1, characterized in that: The liquid inlet pipe (2) is connected to the condensate outlet of the evaporation crystallization system, and the liquid outlet pipe (4) is connected to the recovery water tank.

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