WO2021019494A1 - Appareil de filtration autonettoyant pour échangeurs de chaleur à plaques - Google Patents

Appareil de filtration autonettoyant pour échangeurs de chaleur à plaques Download PDF

Info

Publication number
WO2021019494A1
WO2021019494A1 PCT/IB2020/057210 IB2020057210W WO2021019494A1 WO 2021019494 A1 WO2021019494 A1 WO 2021019494A1 IB 2020057210 W IB2020057210 W IB 2020057210W WO 2021019494 A1 WO2021019494 A1 WO 2021019494A1
Authority
WO
WIPO (PCT)
Prior art keywords
suction pipe
rotation mechanism
low pressure
pressure chamber
heat exchanger
Prior art date
Application number
PCT/IB2020/057210
Other languages
English (en)
Inventor
Zvi Livni
Omer Livni
Original Assignee
Zvi Livni
Omer Livni
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zvi Livni, Omer Livni filed Critical Zvi Livni
Priority to CN202080052526.8A priority Critical patent/CN114127504A/zh
Priority to US17/631,511 priority patent/US20220268537A1/en
Publication of WO2021019494A1 publication Critical patent/WO2021019494A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/027—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes
    • F28F9/0273—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits in the form of distribution pipes with multiple holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
    • F28F2265/06—Safety or protection arrangements; Arrangements for preventing malfunction by using means for draining heat exchange media from heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2280/00—Mounting arrangements; Arrangements for facilitating assembling or disassembling of heat exchanger parts
    • F28F2280/06—Adapter frames, e.g. for mounting heat exchanger cores on other structure and for allowing fluidic connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/083—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning capable of being taken apart
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
    • F28G15/00—Details
    • F28G15/003—Control arrangements

Definitions

  • the present invention is directed to a filtering apparatus for industrial and commercial plate heat exchangers.
  • Plate heat exchangers have a multitude of very thin plates between which liquids or gas circulate, to enable heat exchange. Impurities such as rust, debris, biofilm and other various types of suspended solids present in the water penetrate the heat exchanger and block the water conduits reducing the efficiency of a heat exchanger to the extent that its heat exchange efficiency is severely reduced, which makes cleaning of the heat exchanger inevitable. Cleaning plate heat exchangers is a long and cumbersome operation that usually requires the heat exchange process to be stopped, and the heat exchanger to be opened, wasting a considerable amount of time and causing a loss of production, This process is not done on a daily basis and is avoided as much as possible. Therefore, the accumulation of the suspended matter in the heat exchangers causes significant efficiency loss between cleanups.
  • a self cleaning filtering apparatus for a plate heat exchanger having a frame plate, a pressure plate and a plate pack disposed between the frame plate and the pressure plate, the apparatus including: a suction pipe, centrally disposed within an inlet channel adapted for receiving therein a cooling medium for the plate heat exchanger; nozzles extending radially from, and in fluid communication with, the suction pipe, the nozzles being spaced apart from each other; a low pressure chamber, external to the heat exchanger, abutting the pressure plate, the low pressure chamber in fluid communication with the inlet channel, and a section of the suction pipe extending into the low pressure chamber; a drain valve adapted to reversibly open a drain of the low pressure chamber; and a rotation mechanism controlling axial rotation of the suction pipe.
  • evacuation of the cooling medium from the low pressure chamber exerts a negative pressure on the suction pipe, resulting in a backwash process whereby particulates are suctioned via the nozzles, through the suction pipe into the low pressure chamber and out the drain.
  • the apparatus further includes a screen cylinder fitted in the inlet channel, the screen cylinder adapted to filter the particulates from the cooling medium.
  • the nozzles are spaced apart from each other both radially and axially.
  • the rotation mechanism is an automated rotation mechanism.
  • the drain valve is an automatedly actuated valve.
  • the low pressure chamber is in fluid communication with a pump operationally coupled to the drain, the pump adapted, when actuated, to exert a suction force on the suction pipe.
  • the rotation mechanism is a manually operated rotation mechanism.
  • the rotation mechanism includes a linear actuator.
  • the linear actuator is a hydraulic motor including a cylinder, a piston and a piston rod, the piston rod being operationally coupled to the suction pipe and adapted, when actuated, to cause linear and rotational movement of the suction pipe and the nozzles.
  • the rotation mechanism further controls a linear movement of the suction pipe.
  • the suction pipe is an extensible suction pipe.
  • the screen cylinder is an extensible screen cylinder.
  • a method for self cleaning a plate heat exchanger including the steps of: providing an apparatus for effecting a self cleaning process, the apparatus including: a suction pipe, centrally disposed within an inlet channel adapted to receive therein a cooling medium for the plate heat exchanger, nozzles extending radially from the suction pipe, the nozzles being spaced apart from each other, a low pressure chamber, external to the heat exchanger, abutting a pressure plate of the plate heat exchanger, the low pressure chamber in fluid communication with the inlet channel, the suction pipe extending into the low pressure chamber, a drain valve adapted to reversibly open a drain of the low pressure chamber, and a rotation mechanism controlling axial rotation of the suction pipe; opening the drain valve to evacuate the cooling medium from the low pressure chamber and exert a negative pressure on the suction pipe; actuating the rotation mechanism to axially rotate the suction pipe; and suctioning particulates from the inlet channel, via the nozzles, through the suction
  • the apparatus further comprises a screen cylinder fitted in the inlet channel, the screen cylinder adapted to filter the particulates from the cooling medium; wherein the particulates are suctioned from the screen cylinder.
  • the drain valve is manually actuated.
  • the rotation mechanism is a manually operated rotation mechanism.
  • the drain valve is automatedly actuated.
  • the rotation mechanism is an automated rotation mechanism.
  • the low pressure chamber is in fluid communication with a pump operationally coupled to the drain, the pump adapted, when actuated, to exert a suction force on the suction pipe.
  • the rotation mechanism includes a linear actuator.
  • the linear actuator is a hydraulic motor including a cylinder, a piston and a piston rod, the piston rod being operationally coupled to the suction pipe and adapted, when actuated, to cause linear and rotational movement of the suction pipe and the nozzles.
  • FIG. 1 is a sectional view of a plate heat exchanger with the instant innovative self-cleaning filtering apparatus
  • FIG. 2 is a sectional view of the plate heat exchanger with apparatus 100 with the addition of a screen cylinder installed therein;
  • FIG. 3 is a sectional view of the plate heat exchanger with apparatus 100 installed therein with the addition of a pump
  • FIG. 4 is a sectional view of the plate heat exchanger with apparatus 100 installed therein with the addition of a pump but without a screen cylinder;
  • FIG. 5 is a sectional view of the plate heat exchanger with an apparatus 100 with a manual rotation mechanism
  • FIG. 6 is a sectional view of the plate heat exchanger with an apparatus 100 with a rotation mechanism that is a linear actuator.
  • Plate heat exchangers have various configurations and different people use slightly different terminology for the various parts of the plate heat exchanger. In order to minimize confusion and present a clear nomenclature for the various components of the plate heat exchanger, the following description is provided.
  • a plate heat exchanger is made up of a frame plate, a pressure plate and a plate pack which is disposed between the frame plate and the pressure plate.
  • the frame plate is the front facing plate which has all the connectors (inlet and outlet of the cooling medium and inlet and outlet of the heated medium).
  • the pressure plate is the back piece.
  • the plate pack consists of a plurality of plates, tightly sandwiched together. A heated medium flows through every alternate plate and a cooling medium flows through every other plate, so that each plate with heated medium has a plate with cooling medium next to it.
  • the cooling medium is generally water.
  • the inlet and outlet channels are actually the product of each of plates having inlet/outlet openings (left bottom, right bottom, left top and right top of the plate) and the plates being pressed together.
  • the openings from the channel into the plate are generally small. Therefore, the structure of the inlet channel for the cooling medium serves as a filter for the larger particulates that are found in the cooling medium (water). These larger particulates (stones, trash, shells, peel, etc.) block the inlet channel lowering the efficiency of the heat exchanger by blocking the passageways of the cooling medium.
  • the instant apparatus is a self-cleaning mechanism that removes the aforementioned particulates from the inlet channel.
  • a cylinder screen which is fitted inside the inlet channel.
  • the screen cylinder has a slightly smaller diameter than the inlet channel,
  • the screen serves as a filter for both the large particulates mentioned above as well as smaller particulates that would otherwise pass into the body of the plate heat exchanger (i.e. between the plates) and potentially block some of the water pathways, or line the inside of the plates with muck and grime, both of which further reduce the efficiency of the heat exchanger.
  • the innovative self-cleaning apparatus removes the particulates from the screen.
  • Plate heat exchangers are made up of plates sandwiched together between the frame plate and the pressure plate.
  • the number of plates differs based on the needs of the project at hand.
  • the screen cylinder in some embodiments is accordion-like, able to extend or retract in length based on the side (i.e. number of plates) of the heat exchanger.
  • the suction pipe has a telescopic structure, able to extend or retract in order to fit the length of the inlet channel.
  • the process for removing the particulates that clog the heat exchanger in all the embodiments, is called a backwash process.
  • the backwash process occurs inside the inlet channel of the plate heat exchanger.
  • the backwash process can commence and run even while the heat exchanger is working normally, i.e. fresh water is entering inlet channel of the heat exchanger.
  • Figure 1 illustrates a sectional view of a plate heat exchanger 10 with the instant innovative self-cleaning filtering apparatus 100, according to one embodiment, installed, at least partially, in a water inlet channel 12 of the plate heat exchanger 10.
  • the figure illustrates the half of the plate heat exchanger which includes the cooling medium (e.g. water) inlet 12 (lower end) and outlet 14 (upper end) channels.
  • the plate heat exchanger 10 has a frame plate 16, a pressure plate 18 and a plate pack 20 which is disposed between the frame plate and the pressure plate.
  • the self cleaning filtering apparatus 100 includes a suction pipe 102 which is centrally disposed within the inlet channel 12 that is adapted for receiving a cooling medium (e.g. water) for the plate heat exchanger.
  • the suction pipe extends through an aperture in the pressure plate such that a section 104 of the suction pipe 102 extends out of the native plate heat exchanger and into the low pressure chamber.
  • the suction pipe is propped up and held in place by a circular disk 106 with an aperture in the center thereof.
  • Each nozzle is spaced apart from the adjacent nozzle.
  • the nozzles are spaced apart axially (i.e. along the axis of the pipe).
  • at least some of the nozzles are also spaced apart radially (i.e. facing a different direction).
  • Each nozzle is a hollow pipe section that is connected (e.g.
  • the nozzle is open is the distal end of thereof.
  • Particulates are suctioned through the top opening 109 of the nozzle and into the suction pipe and eventually out the apparatus.
  • a low pressure chamber 110 is installed external to the heat exchanger, abutting the pressure plate 18.
  • the low pressure chamber 110 is installed in-line with the inlet channel and has the same diameter.
  • the low pressure chamber is in limited fluid communication with the inlet channel, e.g. through the suction pipe which opens into the chamber.
  • the chamber fills with water from the inlet channel (e.g. through the nozzles and suction pipe).
  • a section 104 of the suction pipe extends into the low pressure chamber.
  • the suction pipe does not extend all the way to the opposite wall of the chamber, rather a connector rod 112, mechanically couples the suction pipe to a rotation mechanism.
  • the low pressure chamber 110 has a drain 114 for evacuating the water from the chamber.
  • a drain valve 116 closes the drain and is adapted to reversibly open the drain when actuated.
  • the drain valve is an automatedly actuated valve.
  • the drain valve may be a solenoid valve, such as a normally closed solenoid valve.
  • the drain valve is adapted to be electrically actuated. More preferably, the drain valve is adapted to be remotely actuated.
  • Actuation of the drain valve opens the drain and causes evacuation of the cooling medium from the low pressure chamber.
  • the pressure in the chamber is lowered relative to the pressure in the inlet channel such that a vacuum (negative) pressure is exerted on the suction pipe, resulting in a backwash process taking place.
  • particulates are suctioned from the periphery of the inlet channel into the nozzles, as the nozzles rotate about the axis of the suction pipe.
  • the particulates continue to travel through the suction pipe, exiting out of the opening of the section of the suction pipe where the rod enters the pipe. There is sufficient space around the rod for the particulates to exit into the chamber.
  • the water and particulates wash out of the drain of the chamber.
  • the rotation mechanism controls the axial rotation of the suction pipe 102.
  • the rotation mechanism is a motorized mechanism such as an electric motor 118.
  • the motor rotates the rod which rotates the suction pipe such that the nozzles rotate about the periphery of the inlet channel, suctioning up the debris and particulates that are trapped there.
  • the rotation mechanism also causes a linear movement of the suction pipe.
  • the nozzles move in a spiral pattern, as opposed to a circular or rotational pattern (in embodiments without linear movement).
  • a spiral pattern ensures that more of the surface area of the periphery of the inlet channel is cleaned during the backwash process.
  • Fig. 2 illustrates a sectional view of apparatus 100 with the addition of a screen cylinder 120.
  • the screen cylinder 120 is fitted in the inlet channel and adapted to filter particulates from the cooling medium (e.g. water).
  • Screen cylinder 120 is a filter screen with a filter mesh that is adapted to trap or filter particulates that would otherwise block the openings into the plates or pass into the body of the plate heat exchanger and either be flushed out, or more likely, gather inside the heat exchanger, between the plates. These particulates, as mentioned above, clog the plates and lower the overall efficiency of the plate heat exchanger.
  • the nozzles 108, disk 106 and any other corresponding components are adapted, mutatis mutandis, to
  • the nozzles suction the particulates off the screen cylinder (as opposed to the periphery of the inlet channel, as shown in Fig. 1) during the backwash process.
  • the drain valve and rotation mechanism are both controlled by a control unit (not shown).
  • the control unit is in electrical communication with the drain valve and the rotation mechanism.
  • the control unit may be in wired or wireless communication.
  • the control unit may be local or remote.
  • FIG. 3 illustrates a sectional view of the plate heat exchanger with apparatus 100 installed therein with the addition of a pump 122 operationally coupled to the drain 114.
  • Pump 122 may be a mechanical or electromechanical pump.
  • the low pressure chamber 110 is in fluid communication with pump 122.
  • Pump 122 is adapted, when actuated, to exert negative pressure (suction force) on the suction pipe 102.
  • the pump lowers the pressure in the chamber 110 to a greater degree than merely evacuating the contents of the chamber by opening the drain valve (in the aforementioned embodiments).
  • the pump increases the suction force at the nozzles relative to the embodiments without a pump.
  • the drain valve (not shown) is preferably integrated into the pump mechanism (before the drain pipe).
  • the pump, drain valve and rotation mechanism are all controlled by a control unit (not shown).
  • the control unit is in electrical communication with the pump, the drain valve and the rotation mechanism.
  • the control unit may be in wired or wireless communication.
  • the control unit may be local or remote.
  • Figure 4 illustrates the same configuration as Fig. 3 except that the instant embodiment is devoid of a cylinder screen. Other than that, all the components and processes are the same as the embodiment depicted in Fig. 3.
  • FIG. 5 illustrates a sectional view of the plate heat exchanger with an apparatus 100 with a manual rotation mechanism.
  • the exemplary manual rotation mechanism depicted in the Figure is a hand crank or handle 124.
  • the handle is adapted to be rotated by hand, rotating the suction pipe and nozzles about the axis of the rod 112 coupled to the suction pipe 102.
  • the handle 124 is further adapted to effect linear movement of the suction pipe, thereby increasing the surface area covered by the rotating nozzles.
  • the drain valve is depicted as having a solenoid valve. It is to be understood that the depiction of the automatedly actuated drain valve is merely exemplary and not intended to be limiting. As such, in alternative embodiments, the drain valve may be a manually operated drain valve. Alternatively or additionally, the rotation mechanism can be operationally coupled to the drain valve such that manual actuation of the rotation mechanism also effects the operation of the drain valve, for either a manually or automatically actuated valve.
  • Fig. 6 illustrates a sectional view of the plate heat exchanger with an apparatus 100 with a rotation mechanism that is a linear actuator.
  • the linear actuator is a linear hydraulic motor 126.
  • other types of linear actuators know in the art can be used in place of the linear hydraulic motor.
  • Examples of types of linear actuators include, but are not limited to, mechanical actuators (e.g. screw, wheel, cam type actuators), hydraulic actuators, pneumatic actuators, piezoelectric actuators, twisted and coiled polymer (TCP) actuators and electromechanical actuators.
  • Hydraulic motor 126 includes a cylinder 132, a piston 134 and a piston rod 136.
  • the piston rod 136 is operationally coupled to the suction pipe and adapted, when actuated, to cause linear and rotational movement of the suction pipe and the nozzles.
  • the section 104 of the suction pipe 102 includes two fins 128 that extend radially from opposite locations on the section 104 of the suction pipe 102. Each of the fins is in fluid communication with the suction pipe and the low pressure chamber 110. Each fin has an opening 130 near the distal edge of the fin. Water and particulates suctioned out of the inlet channel 102 during the backwash process exit the suction pipe through the openings 130. The water and detritus wash down the drain 114 either under the force of gravity or, in embodiments with a pump, under the suction force of the pump. As intimated, the present configuration including a hydraulic motor can be applied to any of the aforementioned configurations, mutatis mutandis. Likewise, the arrangement of the section 104 of suction pipe 102 as depicted in Fig. 6 can be similarly applied to other embodiments disclosed herein.
  • a modification that can be applied to each of the embodiments is a variation whereby the suction pipe 102 is a telescopic pipe, adapted to extend to a predefined length and retract to a second predefined length.
  • the telescopic structure affords additional versatility and lowers cost of manufacture by avoiding the need to fabricate a suction pipe of the precise length of the inlet channel for each separate project.
  • the telescopic nature of the pipe provides flexibility in the field as last-minute changes to the size of the plate heat exchanger (i.e. the number of plates in the plate pack) may take place and the dynamic length of the suction pipe will prevent further delays of ordering or manufacturing a new pipe.
  • the suction pipe is a modular suction pipe whereby the length of the pipe can be lengthened or shortened by adding or removing sectional pieces that fit onto or into the suction pipe (without the need for cutting or welding etc.) according to the precise needs of the project at hand.
  • a similar modification can be applied to all of the foregoing embodiments that include a screen cylinder.
  • the screen cylinder according to the present variation, has, at least partially, an accordion-like structure, enabling the screen cylinder to extend from a first predefined length up to a second predefined length. Additional length extending structures and techniques, for both the suction pipe and the cylinder screen, are considered to fall within the scope of the invention. Therefore, according to some embodiments the suction pipe 102 is an extensible suction pipe. According to some embodiments, the screen cylinder 120 is an extensible screen cylinder.
  • the method for self-cleaning a plate hear exchanger includes steps detailed hereafter.
  • the self cleaning apparatus 100 must be provided.
  • the apparatus can be installed during the manufacturing process of the plate heat exchanger or during assembly of a plate heat exchanger on site.
  • a plate heat exchanger that is in use already i.e. previously functioning without the self-clean apparatus installed therein
  • the plate heat exchanger can be retrofit with the self-cleaning apparatus of the instant invention.
  • the suction pipe must be installed such that it is centrally disposed within the inlet channel that receives the cooling medium (e.g. water) for the plate heat exchanger.
  • the nozzles extend radially from the suction pipe. As discussed above, the nozzles are spaced apart from each other. They can be spaced apart longitudinally along the axis of the suction pipe. In addition, the nozzles can also be spaced apart radially, i.e. about the axis of the tube. If necessary, the suction pipe can be extensibly adjusted to fit the length of the inlet channel.
  • the low pressure chamber is installed on (or abutting) the pressure plate, on the outside of the native heat exchanger.
  • the suction pipe extends into the low pressure chamber.
  • the low pressure chamber is in fluid communication with the inlet channel, e.g. via the suction pipe.
  • the chamber has a drain that is opened and closed by a drain valve.
  • the apparatus also includes the rotation mechanism that controls axial rotation of the suction pipe. Once all of these components have been installed, the plate heat exchanger is ready to operate (or restart operation after being retrofit with the apparatus).
  • the backwash process cleans the inlet channel of particulates that are trapped on the peripheral surface of the inlet channel, at the openings through which the water travels between the plates.
  • the process includes opening the drain valve to evacuate the cooling medium from the low pressure chamber. Evacuation of the water in the chamber lowers the pressure in the chamber and causes a vacuum pressure to be exerted on the suction pipe.
  • the process further involves actuating the rotation mechanism to axially rotate the suction pipe and hence the nozzles.
  • the nozzles begin suctioning particulates from the inlet channel. Water and particulates sucked in via the nozzles travel through the suction pipe and are deposited into the low pressure chamber. From there, the water and particulates wash out of the drain.
  • the apparatus further includes a screen cylinder fitted in the inlet channel.
  • the screen cylinder is adapted to filter particulates from cooling medium.
  • the particulates are suctioned from the screen cylinder.
  • the accordion-like screen cylinder can be extended to the correct length to fit the inlet channel.
  • the drain valve is a manual mechanism that is manually actuated. In others, the drain valve is an automated mechanism that is automatically actuated. In some embodiments the rotation mechanism is a manually operated rotation mechanism that is manually actuated. In other embodiments, the rotation mechanism is an automated rotation mechanism that is automatically actuated.
  • a pump is operationally coupled to the drain and exerts an increased vacuum pressure / suction force on the chamber and the suction pipe.
  • the rotation mechanism includes a linear actuator.
  • the linear actuator may be any type of applicable linear actuator.
  • the linear actuator is a hydraulic motor including a cylinder, a piston and a piston rod.
  • the piston rod is operationally coupled to the suction pipe and adapted, when actuated, to cause linear and rotational movement of the suction pipe and, hence, the nozzles.
  • any one of the rotational mechanisms discussed above further causes a linear movement of the suction pipe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

L'invention concerne un procédé et un appareil de filtration autonettoyant pour un échangeur de chaleur à plaques comprenant : un tuyau d'aspiration, disposé au centre à l'intérieur d'un canal d'entrée conçu pour contenir un fluide de refroidissement pour l'échangeur de chaleur à plaques ; des buses s'étendant radialement depuis le tuyau d'aspiration et en communication fluidique avec celui-ci, les buses étant espacées l'une de l'autre ; une chambre basse pression, externe à l'échangeur de chaleur, venant en butée contre la plaque de pression, la chambre basse pression étant en communication fluidique avec le canal d'entrée, et une section du tuyau d'aspiration s'étendant dans la chambre basse pression ; un robinet de vidange conçu pour ouvrir de manière réversible un drain de la chambre basse pression ; et un mécanisme de rotation commandant la rotation axiale du tuyau d'aspiration.
PCT/IB2020/057210 2019-08-01 2020-07-30 Appareil de filtration autonettoyant pour échangeurs de chaleur à plaques WO2021019494A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202080052526.8A CN114127504A (zh) 2019-08-01 2020-07-30 用于板式热交换器的自清洁过滤的设备
US17/631,511 US20220268537A1 (en) 2019-08-01 2020-07-30 Self cleaning filtering apparatus for plate heat exchangers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201962881391P 2019-08-01 2019-08-01
US62/881,391 2019-08-01

Publications (1)

Publication Number Publication Date
WO2021019494A1 true WO2021019494A1 (fr) 2021-02-04

Family

ID=74230496

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2020/057210 WO2021019494A1 (fr) 2019-08-01 2020-07-30 Appareil de filtration autonettoyant pour échangeurs de chaleur à plaques

Country Status (3)

Country Link
US (1) US20220268537A1 (fr)
CN (1) CN114127504A (fr)
WO (1) WO2021019494A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113375483A (zh) * 2021-05-10 2021-09-10 杜麒麟 一种板式换热器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022159636A1 (fr) * 2021-01-21 2022-07-28 Modine Manufacturing Company Ensemble échangeur de chaleur à soupape
FR3122919B1 (fr) * 2021-05-12 2023-04-14 Lair Liquide Sa Pour L’Etude Et Lexploitation Des Procedes Georges Claude Echangeur de chaleur comprenant au moins un filtre à particules dans un ou plusieurs de ses passages

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005098341A1 (fr) * 2004-04-05 2005-10-20 Heco Filtration A/S Procede et unite de filtrage pour realiser un filtrage dans des echangeurs thermiques
WO2008019659A1 (fr) * 2006-08-18 2008-02-21 Gea Ecoflex Gmbh Échangeur thermique à plaques
EP2438973A1 (fr) * 2010-10-09 2012-04-11 Gerhard Kobel Séparateur destiné à la séparation de matières solides, notamment à partir de liquides hautement visqueux
CN110285696A (zh) * 2019-05-17 2019-09-27 江阴丹尼尔冷却器有限公司 一种板式换热器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1207919A (en) * 1968-10-29 1970-10-07 Apv Co Ltd Improvements in or relating to plate heat exchangers
JPH11257892A (ja) * 1998-03-13 1999-09-24 Mitsubishi Heavy Ind Ltd 自動逆洗ストレーナ
US6267879B1 (en) * 1999-08-11 2001-07-31 Odis Irrigation Equipment Ltd. Continuous liquid filtering apparatus with multi-layer sintered filtering element
DE10155282A1 (de) * 2001-10-17 2003-06-12 Wtr Plus Gmbh Verfahren und Vorrichtung zur Innenreinigung von Kanälen eines Wärmetauschers
CN105890440A (zh) * 2016-06-23 2016-08-24 扬州派斯特换热设备有限公司 全自动反冲洗换热机组

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005098341A1 (fr) * 2004-04-05 2005-10-20 Heco Filtration A/S Procede et unite de filtrage pour realiser un filtrage dans des echangeurs thermiques
WO2008019659A1 (fr) * 2006-08-18 2008-02-21 Gea Ecoflex Gmbh Échangeur thermique à plaques
EP2438973A1 (fr) * 2010-10-09 2012-04-11 Gerhard Kobel Séparateur destiné à la séparation de matières solides, notamment à partir de liquides hautement visqueux
CN110285696A (zh) * 2019-05-17 2019-09-27 江阴丹尼尔冷却器有限公司 一种板式换热器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113375483A (zh) * 2021-05-10 2021-09-10 杜麒麟 一种板式换热器

Also Published As

Publication number Publication date
CN114127504A (zh) 2022-03-01
US20220268537A1 (en) 2022-08-25

Similar Documents

Publication Publication Date Title
US20220268537A1 (en) Self cleaning filtering apparatus for plate heat exchangers
US10245531B2 (en) High-efficiency automatic self-cleaning strainer
JP5256297B2 (ja) フィルタ装置
EP3600599B1 (fr) Filtre à eau
KR20100014513A (ko) 여과포를 세정하기 위한 장치 및 방법
US7913855B2 (en) Self-cleaning filter for agricultural irrigation water
US9816282B2 (en) Self cleaning swimming pool filter
WO2000004974A8 (fr) Filtre autonettoyant perfectionne
KR101416689B1 (ko) 도관 내의 유체를 위한 필터
KR20120114791A (ko) 자체 세척 스트레이너
CN218833806U (zh) 一种具有自清洁功能的高精度过滤器
CN109226124A (zh) 一种波纹管智能处理机器人
CN115992644B (zh) 一种勘探用硬质矿产钻探装置
CN220026515U (zh) 多级定型机尾气过滤系统
US6827864B2 (en) Filtering apparatus and method for washing its filtering elements
CN217043778U (zh) 一种汽车变速箱壳体生产用清洗装置
CN109528127A (zh) 一种安装在清洗机的喷淋系统及清洗机
CA2997288A1 (fr) Filtre autonettoyant
KR200370318Y1 (ko) 자동세정 필터시스템
KR19990014551A (ko) 자동여과장치
US20230405500A1 (en) Wastewater heat exchange system
RU189135U1 (ru) Самоочищающийся фильтровальный аппарат
CN220530967U (zh) 一种旋转清洗过滤器
CN114838498B (zh) 一种带有疏通结构的壁挂炉
CN219558984U (zh) 一种多级沉降的净化缸

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20846262

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20846262

Country of ref document: EP

Kind code of ref document: A1