CN117942656B - Multistage-filtration pure water preparation equipment and application method thereof - Google Patents
Multistage-filtration pure water preparation equipment and application method thereof Download PDFInfo
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- CN117942656B CN117942656B CN202410353645.7A CN202410353645A CN117942656B CN 117942656 B CN117942656 B CN 117942656B CN 202410353645 A CN202410353645 A CN 202410353645A CN 117942656 B CN117942656 B CN 117942656B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/12—Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
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- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to the technical field of pure water preparation, and particularly discloses multistage-filtering pure water preparation equipment and a using method thereof. The pure water production apparatus includes: filtration device and reverse osmosis purification equipment. The filtering devices are sequentially connected in series to form a multi-stage filter, and the reverse osmosis purifying equipment is connected with the water outlet of the last stage of filtering device so as to carry out reverse osmosis purifying treatment on water subjected to multi-stage filtration. Wherein, the filter device includes: casing, backup pad, filter screen section of thick bamboo, rotation pipe, first blow off pipe, cover body and second blow off pipe. According to the pure water preparation equipment, through the special internal structure and the cooperation between the cover body and the filter screen cylinder, when the filter screen cylinders are backwashed one by one, the rest filter screen cylinders are in a normal water filtering state, so that the filtering device can continuously work, and the problem that the whole equipment is stopped for cleaning the filter screen cylinders is avoided.
Description
Technical Field
The invention relates to the technical field of pure water preparation, in particular to multistage filtering pure water preparation equipment and a using method thereof.
Background
Pure water has a very important influence on the operation of boilers on ships, and qualified boiler water must be subjected to softening treatment according to the regulations of the national mandatory standard, namely: firstly, filtering out impurities in water, and then removing calcium and magnesium ions contained in the water to prevent boiler scaling, thereby achieving the purpose of prolonging the service life of the boiler. In the preparation of pure water, usually, suspended substances, colloids and other solid impurities in water are removed by a filtering device, and then mineral elements such as calcium and magnesium ions, bacteria, viruses and the like in water are removed by a reverse osmosis membrane technology, so that pure water or ultrapure water almost formed by water molecules is obtained. The filtering link is an important ring for preparing pure water, otherwise impurities in the water easily cause the reverse osmosis membrane to be blocked and fail. The existing filtering device is blocked by impurities after being used for a period of time, so that water outlet is not smooth, and the filtering effect is affected. To overcome the above problems, the filter screen is usually backwashed, but this requires the filter device to be stopped, which results in the production of pure water to be stopped. In addition, the filtering effect on water can be ensured by replacing the filter screen, but the mode not only brings extra workload, but also can cause the stop of pure water production.
Disclosure of Invention
The invention aims at solving the problems and provides a multi-stage filtering pure water preparation device and a use method thereof, wherein the device can clean a filter screen without influencing the water filtration, ensure continuous pure water production and realize the cleaning of the filter screen. Specifically, the technical scheme of the invention is as follows.
First, the present invention discloses a multi-stage filtered pure water preparing apparatus, a filtering device of which includes: casing, backup pad, filter screen section of thick bamboo, rotation pipe, first blow off pipe, cover body and second blow off pipe. The shell is vertically arranged, and the supporting plate is of a conical cylindrical structure, is fixed in an inner cavity of the shell and divides the inner cavity into an upper cavity and a lower cavity which are independent from each other. And a water outlet pipe and a water inlet pipe which are respectively communicated with the upper cavity and the lower cavity are fixed on the outer wall of the shell. The upper surface of the supporting plate is fixedly provided with a plurality of filter screen barrels at intervals, and the filter screen barrels are all on the same circumference. The supporting plate is provided with a water through hole which enables the inner cavity of the filter screen cylinder to be communicated with the lower cavity. The rotary pipe is vertically arranged in the lower cavity, the lower end of the rotary pipe penetrates through the bottom surface of the shell and then is communicated with the first sewage draining pipe, and the rotary pipe is in rotary sealing connection with the bottom surface of the shell and the first sewage draining pipe. The upper port of the elastic cover body is closely attached to the lower surface of the supporting plate, and the cover body can cover the water through hole. And two ends of the second blow-down pipe are respectively communicated with the bottom surface of the cover body and the rotating pipe. The rotating pipe is connected with a rotating driving device so as to drive the rotating pipe to rotate.
Further, a drain hole is formed in the center of the supporting plate, the upper port of the rotary pipe is in rotary sealing connection with the drain hole, and the filter screen barrels are distributed around the drain hole. The device also comprises a plugging mechanism for plugging the sewage draining hole in an openable way.
Further, the plugging mechanism comprises a sealing ball, a connecting rod and a lifter. Wherein: the sealing ball is blocked at the upper port of the sewage draining hole. The connecting rod is vertically arranged, the lower end of the connecting rod is fixedly connected with the center of the top surface of the sealing ball, the upper end of the connecting rod penetrates through the top surface of the shell and then is connected with the lifter, and the connecting rod is in rotary sealing connection with the top surface of the shell. And the sealing ball is driven to lift by the lifter, so that the pollution discharge hole on the supporting plate is opened and closed.
Further, the sealing ball is a flexible ball so as to better seal the sewage draining hole. Optionally, the material of the sealing ball comprises any one of rubber, flexible plastic and the like.
Further, the bottom surface of the shell is obliquely arranged, and the lower outer wall of the shell is provided with a sewage outlet which is communicated with the lower cavity. The water inlet pipe is positioned above the high position of the bottom surface of the shell.
Further, a valve is arranged on the first drain pipe to control the on-off of the first drain pipe.
Further, a sealing ring is fixed on the bottom surface of the supporting plate, and the sealing ring and the water through hole are concentrically arranged. The lower surface of the sealing ring is an inclined plane or an arc-shaped surface which is gradually protruded downwards from the outer edge to the inner edge, and when the cover body covers the water through hole, the upper port of the cover body is extruded on the inclined plane or the arc-shaped surface of the sealing ring.
Further, the cover body is of a corrugated tubular structure made of elastic materials, the upper port of the cover body is an inclined port matched with the inclined angle of the supporting plate, and the bottom surface of the cover body is communicated with the second sewage draining pipe.
Further, the rotation driving device comprises a driving wheel and a driving motor. The driving wheel is horizontally fixed on the rotating pipe and positioned below the bottom surface of the shell, and the driving motor is in transmission connection with the driving wheel.
Secondly, the invention discloses a using method of the multistage filtering pure water preparation equipment, which comprises the following steps:
When the filter screen is used, the cover body is rotated to the lower port of one filter screen cylinder to seal the corresponding water through hole. The water through holes corresponding to the other filter screen barrels are in an open state, and water is filtered through the filter screen barrels in the open state. When the filter screen cylinder in the working state is required to be backwashed, the cover body is moved to the corresponding water through hole of one filter screen cylinder in the working state and is closed, and meanwhile, the valve on the first drain pipe is opened. At this time, the water through hole originally closed by the cover body is opened, the corresponding filter screen cylinder starts to play a role in filtering, at this time, under the action of water inlet pressure, water in the upper cavity reversely flows into the inner cavity of the filter screen cylinder closed by the cover body for back flushing, and the flushed water sequentially passes through the second sewage draining pipe, the rotating pipe and the first sewage draining pipe to be drained. And after the flushing is finished, the cover body is rotated to the lower port of the next filter screen cylinder to seal the corresponding water through hole, and the operation is repeated until all the filter screen cylinders finish the back flushing. The filter screen cylinder which is not closed by the cover body in the process can normally play a role in filtering, and meanwhile, generated flushing water cannot enter the upper chamber, so that secondary pollution is avoided.
When the sediment deposited on the supporting plate needs to be removed, a sewage draining hole in the center of the supporting plate is opened, and a valve on the first sewage draining pipe is opened. At this time, the water in the upper chamber is discharged from the drain hole, and sediment on the supporting plate can be taken away in the discharging process.
Compared with the prior art, the invention has at least the following beneficial technical effects:
According to the multistage filtering pure water preparation equipment, through the special internal structure and the cooperation between the cover body and the filter screen cylinder, when the filter screen cylinders are backwashed one by one, the rest filter screen cylinders can be in a normal water filtering state, so that the filtering device can continuously filter, and the problem that the filtering equipment cannot filter water for cleaning the filter screen cylinders is avoided. Meanwhile, in the use process, the water through hole corresponding to the lower port of one filter screen cylinder can be in a closed state by utilizing the cover body, so that the filter screen cylinder does not perform filtering work but is in a standby state. When back flushing is started, once the cover body moves to the next filter screen cylinder, the filter screen cylinder which is closed at first starts to play a role in filtering water, so that the number of filter screen cylinders which are in filtering work in the filtering device cannot be reduced, and the filtering efficiency can be improved due to the fact that the new filter screen cylinder which is not used is adopted to replace the used filter screen cylinder. In addition, when the cover body is rotated to the water through hole on the supporting plate by utilizing the sealing ring with a special structure, the multistage filtering pure water preparation equipment has a temporary downward extrusion effect on the upper port of the cover body, so that the problem that water leakage occurs between the cover body and the lower surface of the supporting plate due to water pressure during back flushing is prevented, back flushing water enters the lower cavity again, and then enters other inner cavities of the filter screen cylinder again from the water through hole, so that impurities under back flushing are not easy to discharge out of the filtering device, and the back flushing efficiency is prevented from being influenced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic view showing the construction of a multi-stage filtered pure water producing apparatus in the following examples.
Fig. 2 is a schematic view showing the internal structure of the filtering device in the following embodiment.
Fig. 3 is a top view of the filter device in the following example.
Fig. 4 is a schematic structural view of the seal ring in the following embodiment.
Fig. 5 is a schematic view of the seal ring in the use state in the following embodiment.
The labels in the figures represent: 1-filter unit, 2-reverse osmosis purifying equipment, 101-shell, 102-support plate, 103-filter screen cylinder, 104-rotary pipe, 105-first blow-down pipe, 106-cover, 107-second blow-down pipe, 108-upper chamber, 109-lower chamber, 110-water outlet pipe, 111-water inlet pipe, 112-shell bottom, 113-water through hole, 114-sealing ball, 115-connecting rod, 116-lifter, 117-sewage outlet, 118-valve, 119-total blow-down pipe, 120-sealing ring, 121-driving wheel.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. The words "upper", "lower", "left" and "right" as used in this disclosure merely denote an upper, lower, left, and right direction consistent with the drawing figures themselves, and are not meant to be limiting in nature, but merely to facilitate the description of the disclosure and to simplify the description, rather than to indicate or imply that the apparatus or elements referred to are required to have a particular orientation, be constructed and operate in a particular orientation, and therefore are not to be construed as limiting of the disclosure. The multistage filtering pure water production apparatus of the present invention will now be further described with reference to the drawings and detailed description of the specification.
Referring to fig. 1, there is illustrated a multi-stage filtered pure water preparing apparatus including: a filtering device 1 and a reverse osmosis purification device 2. The filtering devices 1 are sequentially connected in series to form a multi-stage filter, and the reverse osmosis purification equipment 2 is connected with the water outlet of the last stage of filtering device 1 so as to perform reverse osmosis purification treatment on water subjected to multi-stage filtration, and finally pure water or ultrapure water is obtained. Specifically, referring to fig. 2 and 3, the filtering device 1 includes: a housing 101, a support plate 102, a filter cartridge 103, a rotary pipe 104, a first drain pipe 105, a hood 106, and a second drain pipe 107. Wherein:
The shell 101 is a cylindrical tank body arranged vertically, the supporting plate 102 is in a conical cylindrical structure, the supporting plate 102 is fixed in an inner cavity of the shell 101, and the edge of the supporting plate 102 is fixedly connected with the inner wall of the shell 101 in a sealing manner, so that the inner cavity of the shell 101 is divided into an upper cavity 108 and a lower cavity 109 which are independent from each other. An outlet pipe 110 communicated with the upper chamber 108 is fixed at the upper part of the outer wall of the housing 101, and an inlet pipe 111 communicated with the lower chamber 109 is fixed at the lower part of the outer wall of the housing 101. The water to be filtered enters the shell 101 from the water inlet pipe 111, is filtered by the filter screen cylinder 103, is discharged from the water outlet pipe 110, and then enters the next-stage filtering device 1 for continuous filtering.
A plurality of vertically arranged filter cartridges 103 are fixed on the upper surface of the support plate 102 at intervals, for example, four filter cartridges 103 in this embodiment, and the center points of the lower ports of the filter cartridges 103 are all on the same circumference. The inner cavity of the filter screen cylinder 103 is communicated with the lower chamber 109 below through the water through holes 113 on the supporting plate 102, and the water through holes 113 are concentrically arranged with the lower port of the filter screen cylinder 103. The upper end of the filter screen cylinder 103 is sealed, the top surface of the shell 101 is provided with an opening, the upper end of the filter screen cylinder 103 passes through the opening and then is positioned on the top surface of the shell 101, and the upper end of the filter screen cylinder 103 is fixedly connected with the top surface of the shell 101 in a sealing manner. The lower end surface of the filter screen cylinder 103 is an inclined opening matched with the support plate 102, the inclined opening is fixed on the upper surface of the support plate 102, water entering the lower chamber 109 from the water inlet pipe 111 enters the inner cavity of the filter screen cylinder 103 from the water through hole 113, filtered and then enters the upper chamber 108, finally discharged from the water outlet pipe 110, and the impurity part trapped by the filter screen cylinder 103 falls into the lower chamber 109 to be deposited, and is partially attached to the inner wall of the filter screen cylinder 103. When a certain degree is reached, the water outlet is not smooth (if the water outlet pressure of the water outlet pipe 110 is monitored to be lower than the set value), and the filtering effect is reduced.
For this purpose, in this embodiment, a rotating pipe 104 is vertically disposed in the lower chamber 109, and the lower end of the rotating pipe 104 passes through the bottom surface 112 of the housing and then is communicated with the first drain pipe 105 through a rotating seal joint, and the rotating pipe 104 is also connected with the bottom surface 112 of the housing in a rotating seal manner. The rotating pipe 104 is connected with a rotation driving device to drive the rotating pipe 104 to rotate, and the first sewage draining pipe 105 is fixed. The cover 106 is a bellows-like structure made of elastic material, and the upper port is an inclined port matching the inclined angle of the support plate 102. The upper port of the cover 106 is tightly attached to the lower surface of the support plate 102, the cover 106 can cover the water through hole 113 on the support plate 102, the second drain pipe 107 is a horizontal L-shaped pipe, which is located in the lower chamber 109 and on one side of the rotating pipe 104, and the upper end of the second drain pipe 107 is connected with the bottom surface of the cover 106 and communicated with the inner cavities of the two. The other end of the second sewage draining pipe 107 is fixed on the outer side wall of the rotating pipe 104 and communicated with the rotating pipe.
In use, the cover 106 is rotated to the lower end of one of the filter cartridges 103 to cover the corresponding water through hole 113, so that the filter cartridge is in a closed state (denoted as a filter cartridge). The water through holes 113 corresponding to the rest of the filter screen barrels 103 are in an open state. At this time, the filter cartridges 103 in the open state function to filter water, and the filter cartridge a is in the standby state.
When these filter cartridges 103, which function to filter water, need to be backwashed after a period of operation. The rotation driving device is started to drive the rotation pipe 104 to rotate, so as to drive the second sewage draining pipe 107 and the cover 106 to rotate, after a set angle is rotated, the cover 106 moves to the lower part of another filter screen cylinder, the corresponding water through hole 113 is covered and sealed (marked as a B filter screen cylinder), and the B filter screen cylinder and the A filter screen cylinder can be adjacent. At this time, the water through holes 113 corresponding to the filter cartridge a are restored to the open state, and thus the water is automatically filtered. Meanwhile, after the valve 118 on the first drain pipe 105 is opened, the water in the upper chamber 108 flows reversely into the B filter screen cylinder under the action of water pressure to perform back flushing, impurities attached to the inner cavity wall of the B filter screen cylinder can be flushed down in the flushing process, and then the impurities sequentially pass through the cover 106, the second drain pipe 107, the rotating pipe 104 and the first drain pipe 105 along with flushing water to be discharged.
After the flushing is completed, the cover 106 is rotated to the lower port of the next filter screen cylinder 103 to close the corresponding water through hole 113, and the above operation is repeated until all the filter screen cylinders 103 are backwashed. The filter screen cylinder 103 which is not closed by the cover 106 in the process can normally perform the filtering function, and meanwhile, the generated flushing water cannot enter the upper chamber 108, so that secondary pollution is avoided.
The multistage filtering pure water preparation device of the embodiment is characterized in that the filter device 1 can continuously work by the special internal structure and the cooperation between the cover body 106 and the filter screen cylinder 103, when the filter screen cylinders 103 are backwashed one by one, the rest of the filter screen cylinders 103 are in a normal water filtering state, so that the problem that the filtering device cannot filter water for cleaning the filter screen cylinders 103 is avoided. Meanwhile, in the use process, the cover 106 is utilized to enable the water through hole 113 corresponding to the lower port of one filter screen cylinder 103 to be in a closed state, so that the filter screen cylinder 103 does not perform filtering work, but is in a standby state. When back flushing is started, once the hood 106 moves to the next filter cartridge 103, the filter cartridge 103, which was initially closed, is automatically started, and the filtering action is started. Since each filter cartridge 103 is closed, another filter cartridge 103 is started to be replenished, so that the number of filter cartridges 103 in the filtering apparatus 1 which are in filtering operation is not reduced, and the filtering efficiency is improved since the new unused filter cartridge 103 is used instead of the used filter cartridge 103.
In another embodiment, with continued reference to fig. 2, the support plate 102 of the multi-stage filtered pure water preparing apparatus exemplified in the above embodiment has a drain hole at the center, the upper port of the rotary pipe 104 is rotatably and hermetically connected with the drain hole through a rotary joint, and the filter cartridges 103 are distributed around the drain hole. Further, still include shutoff mechanism, it includes: a sealing ball 114, a connecting rod 115 and a lifter 116. Wherein: the sealing ball 114 is plugged in the upper port of the sewage draining hole, the connecting rod 115 is vertically arranged, the lower end of the connecting rod is fixedly connected with the center of the top surface of the sealing ball 114, the upper end of the connecting rod 115 passes through the top surface of the shell 101 and then is connected with the lifter 116, and the connecting rod 115 is in rotary sealing connection with the top surface of the shell 101. In a more preferred embodiment, the sealing ball 114 is a flexible ball made of flexible materials such as rubber and flexible plastic, so as to better seal the drain hole, and prevent the water pressure loss of the backwash water entering the filter screen cylinder 103 due to leakage of the drain hole from affecting the flushing effect when the backwash of the filter screen cylinder 103 is performed.
In this embodiment, the lifter 116 is used to drive the sealing ball 114 to lift, so as to open and close the drain hole on the support plate 102, thereby cleaning the sediment deposited on the support plate 102. When it is desired to remove the deposits deposited on the support plate 102, the drain hole is opened and the valve on the first drain pipe 105 is opened. At this time, the water in the upper chamber 108 is discharged from the drain hole under the action of the water pressure, and the sediment on the supporting plate 102 can be impacted and carried away in the discharging process, so that the upper chamber 108 is cleaned by the cooperation between the rotating pipe 104 for backwashing the filter screen cylinder 103 and the first drain pipe 105 and the plugging mechanism.
In another embodiment, with continued reference to fig. 2, the bottom surface 112 of the housing of the multi-stage filtered pure water preparing apparatus exemplified in the above embodiment is provided in an inclined shape, and the outer side wall of the housing 101 at a lower position thereof is provided with a sewage discharge port 117, and the sewage discharge port 117 communicates with the lower chamber 109. The water inlet pipe 111 is positioned above the high position of the bottom surface 112 of the shell. During the process of filtering water, part of the filtered impurities fall down into the lower chamber 109 and are deposited on the bottom surface 112 of the shell, and by the inclined arrangement, the sediment deposited on the bottom surface 112 of the shell can be taken away by the diving action of the water entering through the water inlet pipe 111 and discharged from the sewage outlet 117. It is also possible to reduce the valve opening of the outlet pipe 110 or increase the pressure of the inlet water of the inlet pipe 111 when the sewage is discharged, thereby increasing the force of the sediment on the bottom surface 112 of the water diving casing and improving the decontamination efficiency. It should be appreciated that the waste water drain port 117 is normally closed.
In another embodiment, with continued reference to fig. 1, the first drain pipe 105 of each of the filtering devices 1 of the multi-stage filtered pure water preparing apparatus exemplified in the above embodiment communicates with the total drain pipe 119 to discharge the backwash water.
In another embodiment, referring to fig. 4 and 5, the multi-stage filtered pure water preparing apparatus exemplified by the above embodiment further includes a sealing ring 120 fixed on the bottom surface of the support plate 102, each of the water passing holes 113 on the support plate 102 corresponds to one of the sealing rings 120, and the sealing ring 120 is disposed concentrically with the water passing hole 113. The lower surface of the sealing ring 120 is a slope or an arc surface formed by gradually protruding downwards from the outer edge to the inner edge, and when the cover 106 covers the water through hole 113, the upper port of the cover 106 is pressed on the slope or the arc surface of the sealing ring 120.
In this embodiment, when the cover 106 is rotated to the water hole 113 on the support plate 102 by using the seal ring 120 with a special structure, a temporary downward extrusion effect is formed on the upper port of the cover 106, meanwhile, because the cover 106 is a bellows structure made of an elastic material, the cover can be more tightly attached to the lower surface of the support plate 102 under the action of a rebound force after extrusion and compression, so that the problem that water leakage occurs between the cover 106 and the lower surface of the support plate 102 due to water pressure during back flushing is prevented, and back flushing water is prevented from entering the lower chamber 109 again, and then enters the inner cavities of other filter screen cylinders 103 again from the water hole 113, so that impurities under back flushing are not easy to be discharged out of the filter device 1, and the back flushing efficiency is prevented from being influenced. At the same time, the seal ring 120 of the above structure does not affect the removal of the cover 106.
In another embodiment, referring to fig. 1, the rotation driving means in the multistage filtered pure water preparing apparatus exemplified by the above embodiment includes a driving wheel 121 and a driving motor. Wherein: the driving wheel 121 is horizontally fixed on the rotating tube 104 and is located below the bottom surface 112 of the housing, and the driving motor is connected with the driving wheel 121 through a belt or a gear, so that the driving motor is used to drive the rotating tube 104 to rotate, or any other suitable structure can be used to drive the rotating tube 104 to rotate.
Finally, it should be noted that any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention. While the foregoing description of the embodiments of the present invention has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the invention, but rather, it is intended to cover all modifications or variations within the scope of the invention as defined by the claims of the present invention.
Claims (7)
1. The multi-stage filtering pure water preparation equipment is characterized by comprising a filtering device, wherein the filtering device comprises a shell, a supporting plate, a filter screen cylinder, a rotating pipe, a first sewage draining pipe, a cover body and a second sewage draining pipe; wherein:
The shell is vertically arranged, and the supporting plate is of a conical cylindrical structure, is fixed in the inner cavity of the shell and divides the inner cavity into an upper cavity and a lower cavity which are independent from each other; a water outlet pipe and a water inlet pipe which are respectively communicated with the upper cavity and the lower cavity are fixed on the outer wall of the shell; a plurality of vertically arranged filter screen barrels are fixed on the upper surface of the supporting plate at intervals, and the filter screen barrels are all on the same circumference; the supporting plate is provided with a water through hole which enables the inner cavity of the filter screen cylinder to be communicated with the lower cavity;
The rotary pipe is vertically arranged in the lower cavity, the lower end of the rotary pipe penetrates through the bottom surface of the shell and then is communicated with the first sewage draining pipe, and the rotary pipe is in rotary sealing connection with the bottom surface of the shell and the first sewage draining pipe; the upper port of the elastic cover body is closely attached to the lower surface of the supporting plate, and the cover body can cover the water through hole; the cover body is of a corrugated tubular structure made of elastic materials, and the upper port of the cover body is an inclined port matched with the inclined angle of the supporting plate; two ends of the second blow-down pipe are respectively communicated with the bottom surface of the cover body and the rotating pipe; the rotating pipe is connected with the rotating driving device;
The center of the supporting plate is provided with a drain hole, the upper port of the rotary pipe is in rotary sealing connection with the drain hole, and the filter screen barrels are distributed around the drain hole; the device also comprises a plugging mechanism for plugging the sewage draining hole in an openable way, wherein the plugging mechanism comprises a sealing ball, a connecting rod and a lifter; wherein: the sealing ball is blocked at the upper port of the sewage draining hole, the connecting rod is vertically arranged, the lower end of the connecting rod is fixedly connected with the center of the top surface of the sealing ball, the upper end of the connecting rod penetrates through the top surface of the shell and then is connected with the lifter, and the connecting rod is in rotary sealing connection with the top surface of the shell;
a sealing ring is fixed on the bottom surface of the supporting plate and is concentrically arranged with the water through hole; the lower surface of the sealing ring is an inclined plane or an arc-shaped surface which is gradually protruded downwards from the outer edge to the inner edge, and when the cover body covers the water through hole, the upper port of the cover body is extruded on the inclined plane or the arc-shaped surface of the sealing ring.
2. The multi-stage filtered pure water preparing apparatus according to claim 1, wherein the sealing ball is a flexible ball.
3. The apparatus for preparing pure water by multi-stage filtration according to claim 2, wherein the material of the sealing ball comprises any one of rubber and flexible plastic.
4. The apparatus for preparing pure water by multi-stage filtration according to claim 1, wherein the bottom surface of the housing is provided in an inclined shape, and a sewage discharge port is provided on the outer wall of the housing at a lower position thereof, the sewage discharge port being in communication with the lower chamber; the water inlet pipe is positioned above the high position of the bottom surface of the shell.
5. The multi-stage filtered pure water preparing apparatus according to claim 1, wherein a valve is provided on the first drain pipe.
6. The multi-stage filtered pure water preparing apparatus according to any one of claims 1 to 5, wherein the rotation driving means comprises a driving wheel and a driving motor; the driving wheel is horizontally fixed on the rotating pipe and positioned below the bottom surface of the shell, and the driving motor is in transmission connection with the driving wheel.
7. A method of using the multi-stage filtered pure water production apparatus according to any one of claims 1 to 6, comprising:
When in use, the cover body is rotated to the lower port of one of the filter screen barrels to seal the corresponding water through hole; the water holes corresponding to the other filter screen barrels are in an open state, and water is filtered through the filter screen barrels in the open state; when the filter screen cylinder in the working state is required to be backwashed, the cover body is moved to a water through hole corresponding to one of the filter screen cylinders in the working state and is closed, and meanwhile, a valve on the first drain pipe is opened; at the moment, the water through holes which are originally closed by the cover body are opened, the corresponding filter screen cylinder starts to play a role in filtering, at the moment, under the action of water inlet pressure, water in the upper cavity reversely flows into the inner cavity of the filter screen cylinder which is closed by the cover body for back flushing, and the flushed water is sequentially discharged through the second sewage discharge pipe, the rotary pipe and the first sewage discharge pipe; after the flushing is finished, the cover body is rotated to the lower port of the next filter screen cylinder to seal the corresponding water through hole, and the operation is repeated until all the filter screen cylinders finish the back flushing;
When the sediment deposited on the supporting plate needs to be removed, a sewage draining hole in the center of the supporting plate is opened, and a valve on the first sewage draining pipe is opened; at this time, the water in the upper chamber is discharged from the drain hole, and sediment on the supporting plate is taken away in the discharging process.
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| CN213981360U (en) * | 2020-10-23 | 2021-08-17 | 盐城市海河泵业有限公司 | Submersible sewage pump |
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| US9440170B2 (en) * | 2012-12-13 | 2016-09-13 | Eaton Corporation | Liquid filter apparatus |
| KR101870621B1 (en) * | 2015-02-13 | 2018-06-26 | 박정금 | Pleat-pipe boning connection which is containing airtight-ring and airtight-washer |
| CN206837624U (en) * | 2017-04-23 | 2018-01-05 | 关敬 | A kind of environmental protection equipment for Industrial Wastewater Treatment |
| CN210206068U (en) * | 2019-06-28 | 2020-03-31 | 昆山创奇净水有限公司 | Full-automatic filter for sewage purification |
| CN214466890U (en) * | 2020-12-24 | 2021-10-22 | 江苏旭强机电设备有限公司 | Stainless Steel Metal Bellows |
| CN112922095B (en) * | 2021-01-29 | 2021-09-24 | 重庆昕晟环保科技有限公司 | Environment-friendly high-rise building secondary water supply device |
| KR102643739B1 (en) * | 2021-12-29 | 2024-03-04 | 유윤상 | Flexible joint |
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| CN201668991U (en) * | 2010-05-04 | 2010-12-15 | 南通朗高石化设备有限公司 | Fully-automatic back-flush filter |
| CN101979123A (en) * | 2010-10-09 | 2011-02-23 | 深圳市森科妍科技有限公司 | Control system for high-precision liquid filter |
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