CN110975377A - Shellfish catcher for nuclear power plant and fluid filtering method thereof - Google Patents
Shellfish catcher for nuclear power plant and fluid filtering method thereof Download PDFInfo
- Publication number
- CN110975377A CN110975377A CN201911078231.3A CN201911078231A CN110975377A CN 110975377 A CN110975377 A CN 110975377A CN 201911078231 A CN201911078231 A CN 201911078231A CN 110975377 A CN110975377 A CN 110975377A
- Authority
- CN
- China
- Prior art keywords
- fixedly connected
- cylinder
- nuclear power
- seawater
- cylinder body
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 235000015170 shellfish Nutrition 0.000 title claims abstract description 80
- 239000012530 fluid Substances 0.000 title claims abstract description 78
- 238000001914 filtration Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title abstract description 14
- 238000011001 backwashing Methods 0.000 claims abstract description 78
- 239000013535 sea water Substances 0.000 claims abstract description 55
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- 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
- B01D29/11—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 bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
-
- 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
- B01D29/682—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles with a rotary movement with respect to the filtering element
Abstract
The invention provides a shellfish catcher in a nuclear power plant and a fluid filtering method thereof, wherein the shellfish catcher in the nuclear power plant comprises the following components: a fluid inlet end for the entry of seawater; the cylinder is fixedly connected with the fluid inlet end and used for forming a fluid channel and accommodating seawater; the filter cylinder is arranged in the cylinder body and is used for filtering seawater; the fluid outlet end is fixedly connected with the cylinder body, is vertical to the fluid inlet end and is used for allowing filtered seawater to flow out; the power assembly is fixedly connected with the cylinder body and is used for providing rotary driving force through a rotating shaft of the power assembly in the filter cylinder backwashing mode; the two ends of the rotating shaft are respectively fixedly connected with the rotating shaft of the power assembly and the filter cylinder and are used for transmitting the rotating driving force to the filter cylinder to drive the filter cylinder to rotate; and the backwashing nozzles are fixedly connected with the cylinder body and are used for backwashing the filter cylinder. The invention ensures that the shellfish catcher of the nuclear power plant can effectively filter impurities in seawater of an important service water system, ensures the availability of the important service water system and finally ensures nuclear safety.
Description
Technical Field
The invention relates to the field of nuclear power plant equipment, in particular to a shellfish catcher in a nuclear power plant and a fluid filtering method thereof.
Background
At present, in an important factory water system of a nuclear power plant, shellfish and other marine organisms and other impurities are filtered by a shellfish catcher so as to prevent the impurities from entering a heat exchanger to cause blockage accidents.
Shellfish catcher among the prior art adopts rotatory backwash rotor to carry out local back flush to the filter screen wire side more, and wire side itself irrotational, this kind of backwash mode has following defect: the backwashing net surface is small, the processing amount in unit time is small, and the extreme condition that a large amount of impurities enter the shellfish catcher at the same time is difficult to deal with.
Therefore, a shellfish catcher in a nuclear power plant and a fluid filtering method thereof are urgently needed to be found, and the technical problems that the back washing net surface of the existing personnel gate is small, the treatment capacity in unit time is small, a large amount of impurities cannot be treated and enter the shellfish catcher at the same time and the like are solved.
Disclosure of Invention
The invention provides a shellfish catcher in a nuclear power plant and a fluid filtering method thereof, aiming at the technical problems that a backwashing net surface is small, the treatment capacity in unit time is small, a large amount of impurities cannot enter the shellfish catcher at the same time, and the like in the prior art.
The technical scheme provided by the invention for the technical problem is as follows: a nuclear power plant shellfish trap comprising: a fluid inlet end for the entry of seawater; the cylinder is fixedly connected with the fluid inlet end and used for forming a fluid channel and accommodating the seawater; the filter cylinder is arranged inside the cylinder body and is used for filtering the seawater; the fluid outlet end is fixedly connected with the cylinder body, is vertical to the fluid inlet end and is used for allowing the filtered seawater to flow out; the power assembly is fixedly connected with the cylinder body and is used for providing rotary driving force through a rotary shaft of the power assembly in a filter cylinder backwashing mode; the two ends of the rotating shaft are respectively fixedly connected with the rotating shaft of the power assembly and the filter cartridge and are used for transmitting the rotating driving force to the filter cartridge to drive the filter cartridge to rotate; and the backwashing nozzles are fixedly connected with the cylinder body and used for backwashing the filter cylinder.
The shellfish catcher in nuclear power plant of the invention also comprises: the end cover is fixedly connected with the right side of the cylinder body and used for sealing the cylinder body; and the first support frame is clamped between the fluid outlet end and the cylinder body and is used for supporting the rotating shaft.
In the shellfish catcher in nuclear power plant of the invention, the fluid inlet end comprises a fixed end fixedly connected with the cylinder and a connecting end fixedly connected with the fixed end, and the fixed end is used for seawater to enter; the connecting end is used for being fixedly connected with an external introducing pipeline and introducing seawater.
In the shellfish catcher in nuclear power plant of the present invention, the cylinder comprises: a housing for receiving the filter cartridge; the shell is provided with a large round hole matched with the fluid inlet end and a plurality of small round holes matched with the plurality of backwashing nozzles; the left flange is fixedly connected with the left side of the shell and is used for being fixedly connected with the fluid outlet end; the right flange is fixedly connected with the right side of the shell and is used for being fixedly connected with the end cover; the shrouding, with casing right side fixed connection is used for realizing the sealing of barrel, just a round hole has been seted up at the shrouding center for set up first bearing in order to support the rotation axis.
In the shellfish catcher in nuclear power plant of the present invention, the filter cartridge includes: the filter screen is arranged inside the shell, is concentric with the shell and is used for filtering seawater; the connecting ring is fixedly connected with the left side of the filter screen and used for supporting the filter screen, and a gap is reserved between the outer side of the connecting ring and the first support frame; the supporting rods are uniformly distributed in the connecting ring, one end of each supporting rod is fixedly connected with the inner side of the connecting ring, the other end of each supporting rod is fixedly connected with a first pin joint ring arranged at the center of the connecting ring, and the first pin joint ring is provided with a first through hole for fixedly connecting with the rotating shaft; the closing plate is fixedly connected with the right side of the filter screen and is used for supporting the filter screen; a second pin joint ring is arranged in the center of the closing plate, and a second through hole is formed in the second pin joint ring and is used for being fixedly connected with the rotating shaft; and the inner side of the retainer ring is fixedly connected with the outer side of the closing plate, and a gap is reserved between the outer side of the retainer ring and the shell.
In the shellfish catcher in the nuclear power plant, the filter screen is a cylindrical barrel, and the surface of the cylindrical barrel is provided with a plurality of small filter holes of 2-4mm for filtering seawater.
In the shellfish catcher in nuclear power plant of the present invention, the fluid outlet port includes: the small end is far away from the cylinder body, and a small end flange is fixed on one side of the small end, which is far away from the cylinder body, and is used for being connected with an external leading-out pipeline; the big end is close to the barrel, and the big end is provided with a big end flange and is used for being fixedly connected with the barrel.
In the shellfish catcher in nuclear power plant of the present invention, the power assembly comprises: a motor disposed outside the drum for providing a rotational driving force through a rotational shaft thereof in a filter cartridge backwashing mode; the shaft coupling is fixedly sleeved outside the rotating shaft and the rotating shaft of the motor and used for transmitting the rotating driving force generated by the motor to the rotating shaft; and one end of the second support frame is fixedly connected with the motor, and the other end of the second support frame is fixedly connected with the end cover and used for supporting the motor.
In the shellfish catcher in the nuclear power plant, each backwashing nozzle is a conical cylinder body and comprises a large-diameter end and a small-diameter end, the large-diameter end is fixedly connected with the shell, and the small-diameter end is provided with a small-diameter end flange for connecting with an external pipeline; each conical cylinder body also comprises a valve for controlling the on-off of the conical cylinder body and an external pipeline.
In the shellfish catcher in nuclear power plant of the present invention, the first support frame includes: the supporting flange is clamped between the large-end flange and the left flange; a plurality of support piece sets up and supports the flange inside along supporting the radial equipartition of flange, its one end and support flange fixed connection, and the support ring sets up support flange center, its outside and a plurality of support piece fixed connection, the support ring is used for setting up the second bearing in order to support the rotation axis.
The invention also provides a fluid filtering method of the shellfish catcher in the nuclear power plant, which comprises the following steps: judging whether the shellfish catcher of the nuclear power plant is in a normal filtering mode or a filter cylinder backwashing mode; if the seawater is in the normal filtering mode, the connection between the cylinder body and the backwashing nozzle is disconnected, seawater enters the cylinder body from the fluid inlet end, passes through the filter screen and enters the interior of the filter cylinder, and the filtered seawater flows along the axial direction of the filter cylinder and flows out of the shellfish catcher in the nuclear power plant from the fluid outlet end; if the filter cartridge is in a filter cartridge backwashing mode, the cylinder body is communicated with the backwashing nozzle, meanwhile, the power assembly provides driving force to drive the filter cartridge to rotate, seawater enters the cylinder body from the fluid inlet end, and partial seawater close to the backwashing nozzle is discharged through the backwashing nozzle under the action of differential pressure, so that the purpose of flushing the filter cartridge is achieved.
The technical scheme provided by the invention has the beneficial effects that: the invention provides a shellfish catcher in a nuclear power plant and a fluid filtering method thereof, aiming at the technical problems that the backwashing net surface is smaller, the processing capacity in unit time is small, a large amount of impurities are difficult to be simultaneously treated and enter the shellfish catcher and the like in the prior art, and a filter cylinder is static to execute the filtering function in the filtering state; in the back washing state of the filter cylinder, a valve connected with a back washing nozzle is opened, the motor drives the filter cylinder to rotate, the periphery of a filter screen close to the back washing nozzle is close to the periphery of the filter screen, fluid flows from the inside of the filter screen to the outside of the filter screen due to the action of pressure difference, impurities attached to the screen surface are washed away from the screen surface and are taken away through the back washing nozzle along with the back washing water flow. The shellfish catcher provided by the invention has the characteristics of large filtering area and strong backwashing capability, can effectively filter impurities in seawater of an important factory water system, ensures the availability of the important factory water system and finally ensures nuclear safety.
Drawings
FIG. 1 is a schematic diagram of a shellfish catcher in a nuclear power plant according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a shellfish catcher in a nuclear power plant according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a shellfish catcher cylinder of a nuclear power plant according to an embodiment of the present invention;
fig. 4 is a cross-sectional view of a nuclear power plant shellfish trap filter cartridge according to one embodiment of the present invention;
fig. 5 is another cross-sectional view of a nuclear power plant shellfish trap filter cartridge according to one embodiment of the present disclosure;
fig. 6 is a schematic structural view of a first support frame of a shellfish catcher in a nuclear power plant according to an embodiment of the present invention;
fig. 7 is a front view of a normal filtering mode of a shellfish catcher in a nuclear power plant according to an embodiment of the present invention;
fig. 8 is a left side view of a normal filtering mode operation of a shellfish catcher in a nuclear power plant according to an embodiment of the present invention;
fig. 9 is a front view of a back flushing mode of a filter cartridge of a shellfish catcher in a nuclear power plant according to an embodiment of the present invention;
fig. 10 is a left side view of a nuclear power plant shellfish trap filter cartridge backwashing mode of operation according to an embodiment of the present invention;
fig. 11 is a flowchart of a fluid filtering method for a shellfish catcher in a nuclear power plant according to a second embodiment of the present invention.
Detailed Description
In order to solve the technical problems that a backwashing net surface is small, the treatment capacity in unit time is small, a large amount of impurities cannot enter a shellfish catcher at the same time and the like in the prior art, the shellfish catcher in the nuclear power plant and the fluid filtering method thereof are provided, and a filter cylinder is static in a filtering state to execute a filtering function; in the back washing state of the filter cylinder, a valve connected with a back washing nozzle is opened, the motor drives the filter cylinder to rotate, the periphery of a filter screen close to the back washing nozzle is close to the periphery of the filter screen, fluid flows from the inside of the filter screen to the outside of the filter screen due to the action of pressure difference, impurities attached to the screen surface are washed away from the screen surface and are taken away through the back washing nozzle along with the back washing water flow. The shellfish catcher provided by the invention has the characteristics of large filtering area and strong backwashing capability, can effectively filter impurities in seawater of an important factory water system, ensures the availability of the important factory water system and finally ensures nuclear safety.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example one
The invention provides a shellfish catcher in a nuclear power plant, which comprises the following components in percentage by weight as shown in figure 1:
a fluid inlet end 1 for seawater to enter;
the cylinder body 2 is fixedly connected with the fluid inlet end 1 and is used for forming a fluid channel and accommodating seawater;
the fluid outlet end 4 is fixedly connected with the cylinder 2, is vertical to the fluid inlet end 1 and is used for allowing filtered seawater to flow out;
further, as shown in fig. 2, the nuclear power plant shellfish catcher further comprises:
the filter cylinder 3 is arranged inside the cylinder body 2 and is used for filtering seawater;
the power assembly 5 is fixedly connected with the cylinder body 2 and is used for providing rotary driving force through a rotating shaft of the power assembly in a filter cylinder backwashing mode;
the two ends of the rotating shaft 6 are respectively fixedly connected with the rotating shaft of the power component 5 and the filter cartridge 3 and are used for transmitting the rotating driving force to the filter cartridge 3 and driving the filter cartridge 3 to rotate;
and the backwashing nozzles 7 are fixedly connected with the cylinder body 2 and are used for backwashing the filter cylinder 3. Preferably, the plurality of back washing nozzles 7 are connected with the cylinder 2 through an external pipeline, and the external pipeline is provided with a valve, and the connection or disconnection of the back washing nozzles 7 and the cylinder 2 is controlled through the opening and closing of the valve.
According to the invention, when the filter screen backwashing mode is set, the filter cylinder 3 is driven by the power assembly 5 and the rotating shaft 6 to rotate, so that the technical problems of small mesh surface, small treatment capacity in unit time and the like of the backwashing filter cylinder 3 caused by non-rotation of the filter cylinder 3 are solved, the backwashing capability of the shellfish catcher in the nuclear power plant is improved, and the equipment reliability of the shellfish catcher in the nuclear power plant is improved.
Further, it can also be seen from fig. 2 that: this shellfish catcher of nuclear power plant still includes:
the end cover 8 is fixedly connected with the right side of the cylinder body 2 and used for sealing the cylinder body 2; the seawater entering the cylinder 2 is prevented from flowing out or seeping out from the right side of the cylinder 2, so that the filtering performance is reduced; wherein, a through hole is arranged in the center of the end cover 8 and is used for the rotating shaft 6 to pass through, and preferably, a filler is arranged between the rotating shaft 6 and the end cover 8 for sealing, thereby improving the filtering performance of the shellfish catcher in the nuclear power plant.
And a first support frame 9 clamped between the fluid outlet end 4 and the cylinder 2 for supporting the rotating shaft 6. Through setting up first support frame 9 and supporting rotation axis 6, can prevent to appear rocking or phenomenon such as vibrations when rotation axis 6 is too long, lead to the operation unstable to influence the performance of nuclear power plant's shellfish catcher. Specifically, the first support frame 9 is provided with a second bearing 94 for supporting the rotating shaft 6; wherein the outer ring of the second bearing 94 is fixed and the inner ring is fixed with the rotating shaft 6, wherein the outer ring and the inner ring are rotatably connected, thereby realizing the rotary connection of the first support frame 9 and the rotating shaft 6 through the second bearing 94,
in particular, it can also be seen from fig. 2: the fluid inlet end 1 comprises a fixed end 11 fixedly connected with the cylinder 2 and a connecting end 12 fixedly connected with the fixed end 11, and the fixed end 11 is used for seawater to enter; the connection end 12 is used for being fixedly connected with an external introduction pipeline and is used for introducing seawater. Preferably, the connection end 12 can be designed as a connection flange for connection with an external inlet pipe by means of bolts. It should be noted that: the fluid inlet end 1 may be cylindrical or conical, but is not limited thereto, and when conical, the diameter of the connecting end 12 is larger than that of the fixed end.
Further, the fluid outlet port 4 comprises: the small end 41 is far away from the cylinder 2, and a small end flange is fixed on one side of the small end 41 far away from the cylinder and is used for being connected with an external leading-out pipeline; the big end 42 is close to the cylinder 2, and the big end 42 is provided with a big end flange for being fixedly connected with the cylinder 2. It should be noted that: the fluid outlet end 4 may also be provided in a cylindrical shape.
It should be noted that fig. 2 also shows that: the cylinder 2 is provided with a first bearing 25 for supporting the rotary shaft 6. Wherein the outer ring of the first bearing 25 is fixed, the inner ring is fixed with the rotating shaft 6, wherein the outer ring and the inner ring are rotatably connected, thereby realizing the rotary connection of the cylinder body 2 and the rotating shaft 6 through the first bearing 25,
further, the power assembly 5 includes:
a motor 51 provided outside the drum 2 for providing a rotational driving force through a rotational shaft thereof in the cartridge backwashing mode;
a coupling 52 fixedly sleeved outside the rotating shaft 6 and the rotating shaft of the motor 51 for transmitting the rotational driving force generated by the motor 51 to the rotating shaft 6; the coupling 52 comprises a first coupling end 521 and a second coupling end 522, the first coupling end 521 is fixedly connected with the rotating shaft 6, the second coupling end 522 is fixedly connected with the rotating shaft of the motor, and the first coupling end 521 is fixedly connected with the second coupling end 522;
one end of the second support frame 53 is fixedly connected with the motor 51, and the other end is fixedly connected with the end cover 8 and used for supporting the motor 51. By providing the second support bracket 53 to support the motor 51, the operation stability of the motor 51 can be improved.
Further, in one embodiment of the present invention, two back washing nozzles 7 are provided at the top of the cylinder 2, and it should be noted that other numbers of back washing nozzles 7 may be provided according to the water discharge amount and the diameter of the cylinder 2, which is not limited in this respect. Specifically, each backwashing nozzle 7 is a conical cylinder body and comprises a large-diameter end 71 and a small-diameter end 72, the large-diameter end 71 is fixedly connected with the cylinder body 2, and a small-diameter end flange is arranged at the small-diameter end 72 and is used for being connected with an external pipeline; each conical cylinder further comprises a valve (not shown) for controlling the connection and disconnection of the conical cylinder and the external pipeline.
Further, as shown in fig. 3, the cylinder 2 includes:
a housing 21 for accommodating the filter cartridge 3; wherein, the shell 21 is a cylindrical thin-wall cylinder, a big round hole 211 matched with the end of the fluid inlet 1 and a plurality of small round holes 212 matched with a plurality of back washing nozzles 7 are arranged on the shell 21;
a left flange 22 fixedly connected with the left side of the housing 21 and used for fixedly connecting with the fluid outlet end 4; specifically, a plurality of bolt holes are uniformly distributed in the left flange 22, the fluid outlet end 4 is provided with a large-end flange, the large-end flange is also provided with a plurality of bolt holes corresponding to the left flange 22, and when connection is needed, the left flange 22 and the large-end flange are connected through bolts to realize fixed connection with the fluid outlet end 4;
the right flange 23 is fixedly connected with the right side of the shell 21 and is fixedly connected with the end cover 8; specifically, a plurality of bolt holes are uniformly distributed in the right flange 23, a plurality of bolt holes corresponding to the right flange 23 are also arranged in the end cover 8, and when connection is needed, the right flange 23 and the end cover 8 are connected through bolts, so that the right flange 23 and the end cover 8 are fixedly connected;
the closing plate 24 is fixedly connected with the right side of the shell 21 and used for sealing the cylinder 2 and preventing seawater entering the cylinder 2 from flowing out of the cylinder 2 from the non-fluid outlet end 4 to reduce the filtering performance of the shellfish catcher in the nuclear power plant. The center of the sealing plate 24 is provided with a through hole for the rotation shaft 6 to pass through and support the rotation shaft 6, and preferably, the rotation shaft 6 can be supported by providing a bearing.
Further, as shown in fig. 4, the filter cartridge 3 includes:
a filter screen 31 disposed inside the housing 21 concentrically with the housing 21 for filtering seawater; specifically, the filter screen 31 is a cylindrical cylinder, and the surface of the cylindrical cylinder is provided with a plurality of 2-4mm small filter holes for filtering seawater.
The connecting ring 32 is fixedly connected with the left side of the filter screen 31 and used for supporting the filter screen 31, the height of the connecting ring 32 is higher than that of the filter screen 31, and a gap is reserved between the outer side of the connecting ring 32 and the first support frame 9; it should be noted that the gap between the outer side of the connecting ring 32 and the first support frame 9 should be as small as possible to ensure the filtering performance;
a plurality of support rods 33 uniformly distributed inside the connection ring 32, wherein one end of each of the plurality of support rods 33 is fixedly connected with the inner side of the connection ring 32, and the other end is fixedly connected with a first pin ring 34 arranged at the center of the connection ring 32, and preferably, the support rods 33 are directly connected with the connection ring 32 and the first pin ring 34 by welding; the first pin ring 34 is provided with a first through hole for fixedly connecting with the rotating shaft 6; it should be noted that, in one embodiment of the present invention, the number of the support rods 33 is 8, but is not particularly limited, and may be set according to actual working conditions;
a closing plate 35 fixedly connected to the right side of the screen 31 for supporting the screen 31, preferably by welding; the height of the closing plate 35 is higher than that of the filter screen 31, a second pin joint ring 36 is arranged in the center of the closing plate 35, and a second through hole is formed in the second pin joint ring 36 and is used for being fixedly connected with the rotating shaft 6;
a collar 37, the inner side of which is fixedly connected, preferably by welding, to the outer side of the closing plate 35; the outer side and the shell 21 are provided with a gap; the retaining ring 37 is selected from different specifications for adjusting the gap between the outer side and the housing 21. This gap should also be as small as possible to ensure filtration performance.
Further, as shown in fig. 5, the rotation shaft 6 penetrates the first and second pinning rings 34 and 36, and the pinning rings 34 and 36 are fixedly connected to the rotation shaft 6 by connection pins, so that when the rotation shaft 3 rotates, the entire filter cartridge 3 can be rotated by the pinning rings 34 and 36.
Further, as shown in fig. 6, the first support frame 9 includes:
a support flange 91 clamped between the large end flange 44 and the left flange 22;
the supporting pieces 92 are arranged inside the supporting flange 91 and are uniformly distributed along the radial direction of the supporting flange 91, and one end of each supporting piece 92 is fixedly connected with the supporting flange 91;
and a support ring 93 disposed at the center of the support flange 91, the outer side of which is fixedly connected to the plurality of support members 92, the support ring 93 being fixedly connected to the rotary shaft 6 for supporting the rotary shaft 6. It should be noted that, in one embodiment of the present invention, the number of the supporting members 92 is 8, but is not particularly limited, and may be set according to actual conditions. Wherein the connection between the support ring 93 and the rotating shaft 6 is preferably realized by means of bearings.
In addition, the shellfish catcher in the nuclear power plant has two working modes, namely a normal filtering mode and a filter cylinder backwashing mode; as shown in fig. 7, when the shellfish catcher is in the normal filtering mode, the valve connected to the external pipeline of the back flush nozzle 7 is in the closed state, seawater enters from the fluid inlet port 1 and flows into the annular space between the cylinder 2 and the filter cartridge 3, the seawater flows into the filter cartridge 3 through the filter cartridge 3 (impurities are trapped on the side of the filter cartridge 3), and flows along the filter cartridge 3 after being collected, and flows out of the shellfish catcher from the fluid outlet port 4. And can be seen in fig. 8: seawater enters the cylinder body 2 from the fluid inlet end 1 and is filtered in the filter cylinder 3, and finally only flows out of the shellfish catcher from the fluid outlet end 4 without flowing through the back washing nozzle 7.
Further, as shown in fig. 9, when the shellfish catcher is in the filter cartridge backwashing mode, the valve connected to the external pipeline of the backwashing nozzle 7 is in an open state, the motor 51 drives the coupling 52 and the rotating shaft 6 to rotate, the rotating shaft 6 drives the filter cartridge 3 to rotate, and at this time, because of the pressure difference between the inside of the filter cartridge 3 and the external pipeline of the backwashing nozzle 7, a part of the fluid near the backwashing nozzle 7 crosses the filter screen from the inside of the filter cartridge 3, so as to flush down the impurities outside the filter screen, and the impurities are discharged through the backwashing nozzle 7 along with the backwashing water flow. At the moment, the rotating shaft 6 drives the filter cylinder 3 to slowly rotate, so that all the net surfaces of the filter screen are effectively backwashed. During cartridge backwash, bulk fluid in the seawater still flows from the outside of the filter screen to the inside and out of the shellfish catcher through the fluid outlet port 4. further, as shown in fig. 10, during cartridge backwash, only a small portion of the fluid backflushes the filter screen near the backwash nozzle 7. The other part of the seawater is still flowing out through the fluid outlet port 4.
Example two
The invention also provides a fluid filtering method for the shellfish catcher in the nuclear power plant, which is suitable for the shellfish catcher in the nuclear power plant in the first embodiment, and as shown in fig. 11, the fluid filtering method comprises the following steps:
step S1, judging whether the shellfish catcher of the nuclear power plant is in a normal filtering mode or a filter cylinder backwashing mode;
step S2, if the normal filtration mode is adopted, the connection between the cylinder body 2 and the back washing nozzle 7 is closed, seawater enters the cylinder body 2 from the fluid inlet end 1 and enters the interior of the filter cylinder 3, the filtered seawater flows along the axial direction of the filter cylinder 3 and flows out of the shellfish catcher of the nuclear power plant from the fluid outlet end 4; preferably, the connection between the drum 2 and the backwash nozzle 7 can be closed by closing a valve between the drum 2 and the backwash nozzle 7;
step S3, if the mode is a filter cartridge backwashing mode, the barrel 2 is communicated with the backwashing nozzle 7, and at the same time, the power assembly 5 provides driving force to drive the filter cartridge 3 to rotate, seawater enters the barrel 2 from the fluid inlet end 1, and part of seawater near the backwashing nozzle 7 is discharged through the backwashing nozzle 7 under the action of differential pressure, thereby achieving the purpose of flushing the filter cartridge 3. Preferably, the connection of the backwash nozzle 7 with the bowl 2 is achieved by opening a valve connecting the backwash nozzle 7 with an external pipe; the specific process of the power assembly 5 for providing the driving force is as follows: the motor 51 provides a rotary driving force, and the driving force is transmitted through the coupler 52 and the rotary shaft 6 to drive the filter cartridge 3 to rotate; and the seawater finally washes out the screen 31 in the filter cartridge 3.
It should be noted that during the cartridge backwash, the bulk fluid in the seawater still flows from the outside of the filter screen 31 to the inside and out of the shellfish catcher through the fluid outlet port 4, but a small portion of the fluid backflushes the filter screen 31 near the backwash nozzle 7.
In conclusion, the invention provides the shellfish catcher of the nuclear power plant and the fluid filtering method thereof, which solve the technical problems that the backwashing net surface is smaller, the processing capacity in unit time is small, and a large amount of impurities are difficult to enter the shellfish catcher at the same time in the prior art, and the like, and the filtering function is executed by designing the filter cylinder to be static in the filtering state; in the back washing state of the filter cylinder, a valve connected with a back washing nozzle is opened, the motor drives the filter cylinder to rotate, the periphery of a filter screen close to the back washing nozzle is close to the periphery of the filter screen, fluid flows from the inside of the filter screen to the outside of the filter screen due to the action of pressure difference, impurities attached to the screen surface are washed away from the screen surface and are taken away through the back washing nozzle along with the back washing water flow. The shellfish catcher provided by the invention has the characteristics of large filtering area and strong backwashing capability, can effectively filter impurities in seawater of an important factory water system, ensures the availability of the important factory water system and finally ensures nuclear safety.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention should be included in the protection of the present invention.
Claims (11)
1. A shellfish trap for nuclear power plants, comprising:
a fluid inlet port (1) for the entry of seawater;
the cylinder body (2) is fixedly connected with the fluid inlet end (1) and is used for forming a fluid channel and accommodating seawater;
the filter cylinder (3) is arranged inside the cylinder body (2) and is used for filtering seawater;
the fluid outlet end (4) is fixedly connected with the cylinder (2), is vertical to the fluid inlet end (1) and is used for allowing filtered seawater to flow out;
the power assembly (5) is fixedly connected with the cylinder body (2) and is used for providing rotary driving force through a rotating shaft of the power assembly in a filter cylinder backwashing mode;
the two ends of the rotating shaft (6) are respectively fixedly connected with the rotating shaft of the power assembly (5) and the filter cartridge (3) and are used for transmitting the rotating driving force to the filter cartridge (3) and driving the filter cartridge (3) to rotate;
the backwashing nozzles (7) are fixedly connected with the cylinder body (2) and are used for backwashing the filter cylinder (3).
2. The nuclear power plant shellfish trap of claim 1, further comprising:
the end cover (8) is fixedly connected with the right side of the cylinder body (2) and is used for sealing the cylinder body (2);
a first support frame (9) clamped between the fluid outlet end (4) and the cylinder (2) for supporting the rotating shaft (6).
3. The nuclear power plant shellfish trap according to claim 2, characterized in that the fluid inlet end (1) comprises a fixed end (11) fixedly connected to the cylinder (2) and a connecting end (12) fixedly connected to the fixed end (11), the fixed end (11) being adapted for seawater ingress; the connecting end (12) is fixedly connected with an external introducing pipeline and used for introducing seawater.
4. The nuclear power plant shellfish trap according to claim 3, characterized in that the cylinder (2) comprises:
a housing (21) for housing the filter cartridge (3); the shell (21) is provided with a large round hole (211) matched with the fluid inlet end (1) and a plurality of small round holes (212) matched with the plurality of backwashing nozzles (7);
the left flange (22) is fixedly connected with the left side of the shell (21) and is used for being fixedly connected with the fluid outlet end (4);
the right flange (23) is fixedly connected with the right side of the shell (21) and is used for being fixedly connected with the end cover (8);
shrouding (24), with casing (21) right side fixed connection is used for realizing the sealed of barrel (2), just a round hole has been seted up at shrouding (24) center for set up first bearing (25) in order to support rotation axis (6).
5. The nuclear power plant shellfish trap according to claim 4, characterized in that the filter cartridge (3) comprises:
a filter screen (31) disposed inside the housing (21) concentrically with the housing (21) for filtering seawater;
the connecting ring (32) is fixedly connected with the left side of the filter screen (31) and used for supporting the filter screen (31), and a gap is reserved between the outer side of the connecting ring (32) and the first support frame (9);
the supporting rods (33) are uniformly distributed in the connecting ring (32), one end of each supporting rod (33) is fixedly connected with the inner side of the connecting ring (32), the other end of each supporting rod (33) is fixedly connected with a first pin ring (34) arranged at the center of the connecting ring (32), and each first pin ring (34) is provided with a first through hole for fixedly connecting with the rotating shaft (6);
the closing plate (35) is fixedly connected with the right side of the filter screen (31) and is used for supporting the filter screen (31); a second pin joint ring (36) is arranged at the center of the closing plate (35), and a second through hole is formed in the second pin joint ring (36) and is used for being fixedly connected with the rotating shaft (6);
and the inner side of the retainer ring (37) is fixedly connected with the outer side of the closing plate (35), and a gap is reserved between the outer side of the retainer ring and the shell (21).
6. The shellfish catcher used in nuclear power plants as claimed in claim 5, wherein the filter screen (31) is a cylindrical cylinder, and the surface of the cylindrical cylinder is provided with a plurality of small filter holes of 2-4mm for filtering seawater.
7. The nuclear power plant shellfish trap according to claim 6, characterized in that the fluid outlet port (4) comprises:
the small end (41) is far away from the cylinder body (2), and a small end flange is fixed on one side, far away from the cylinder body (2), of the small end (41) and is used for being connected with an external leading-out pipeline;
the large-head end (42) is close to the cylinder body (2), and a large-head end flange is arranged on the large-head end (42) and is used for being fixedly connected with the cylinder body (2).
8. The nuclear power plant shellfish trap according to claim 7, characterized in that the power assembly (5) comprises:
a motor (51) provided outside the drum (2) for providing a rotational driving force through a rotational shaft thereof in a filter cartridge backwashing mode;
the coupling (52) is fixedly sleeved outside the rotating shaft (6) and the rotating shaft of the motor (51) and is used for transmitting the rotating driving force generated by the motor (51) to the rotating shaft (6);
and one end of the second support frame (53) is fixedly connected with the motor (51), and the other end of the second support frame is fixedly connected with the end cover (8) and is used for supporting the motor (51).
9. The nuclear power plant shellfish trap according to claim 8, characterized in that each backwash nozzle (7) is a conical cylinder comprising a large diameter end (71) and a small diameter end (72), the large diameter end (71) being fixedly connected to the housing (21), the small diameter end (72) being provided with a small diameter end flange for connection to an external pipe; each conical cylinder body also comprises a valve for controlling the on-off of the conical cylinder body and an external pipeline.
10. The nuclear power plant shellfish trap according to claim 9, characterized in that the first support frame (9) comprises:
a support flange (91) clamped between the big end flange and the left flange (22);
the supporting pieces (92) are arranged inside the supporting flange (91) and are uniformly distributed along the radial direction of the supporting flange (91), and one end of each supporting piece is fixedly connected with the supporting flange (91);
the supporting ring (93) is arranged in the center of the supporting flange (91), the outer side of the supporting ring is fixedly connected with a plurality of supporting pieces (92), and the supporting ring (93) is used for arranging a second bearing (94) to support the rotating shaft (6).
11. A nuclear power plant shellfish trap fluid filtration method adapted for use with the nuclear power plant shellfish trap of claim 1, comprising:
judging whether the shellfish catcher of the nuclear power plant is in a normal filtering mode or a filter cylinder backwashing mode;
if the seawater is in the normal filtering mode, the connection between the cylinder body (2) and the backwashing nozzle (7) is disconnected, seawater enters the cylinder body (2) from the fluid inlet end (1) and passes through the cylinder body (2) to enter the filter cylinder (3), the filtered seawater flows along the axial direction of the filter cylinder (3) and flows out of the shellfish catcher of the nuclear power plant from the fluid outlet end (4);
if the filter cartridge is in a filter cartridge backwashing mode, the cylinder body (2) is communicated with the backwashing nozzle (7), meanwhile, the power assembly (5) provides driving force to drive the filter cartridge (3) to rotate, seawater enters the cylinder body (2) from the fluid inlet end (1), and partial seawater close to the backwashing nozzle (7) is discharged through the backwashing nozzle (7) under the action of differential pressure, so that the purpose of flushing the filter cartridge (3) is achieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911078231.3A CN110975377A (en) | 2019-11-06 | 2019-11-06 | Shellfish catcher for nuclear power plant and fluid filtering method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911078231.3A CN110975377A (en) | 2019-11-06 | 2019-11-06 | Shellfish catcher for nuclear power plant and fluid filtering method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110975377A true CN110975377A (en) | 2020-04-10 |
Family
ID=70083287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911078231.3A Pending CN110975377A (en) | 2019-11-06 | 2019-11-06 | Shellfish catcher for nuclear power plant and fluid filtering method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110975377A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111514638A (en) * | 2020-04-29 | 2020-08-11 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Marine filter equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2406095Y (en) * | 1999-11-17 | 2000-11-15 | 河南电力试验研究所 | Inlet-filter for wash-type water-supplying pump |
| ATA176699A (en) * | 1999-10-19 | 2002-03-15 | Reinhard Gasperl | FILTER HOUSING FOR LIQUIDS |
| CN2528995Y (en) * | 2001-12-08 | 2003-01-01 | 郭竞生 | Fluid filter unit |
| WO2016085107A1 (en) * | 2014-11-27 | 2016-06-02 | 한라아이엠에스 주식회사 | Filter having backwash nozzle with improved backwash performance for ballast water treatment apparatus |
| CN206560715U (en) * | 2017-03-15 | 2017-10-17 | 南京谷牛智能科技有限公司 | A kind of pressure difference automatic flushing filtering system |
| CN207421400U (en) * | 2017-11-13 | 2018-05-29 | 阳江核电有限公司 | A kind of tee valve type filter capable of washing |
-
2019
- 2019-11-06 CN CN201911078231.3A patent/CN110975377A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATA176699A (en) * | 1999-10-19 | 2002-03-15 | Reinhard Gasperl | FILTER HOUSING FOR LIQUIDS |
| CN2406095Y (en) * | 1999-11-17 | 2000-11-15 | 河南电力试验研究所 | Inlet-filter for wash-type water-supplying pump |
| CN2528995Y (en) * | 2001-12-08 | 2003-01-01 | 郭竞生 | Fluid filter unit |
| WO2016085107A1 (en) * | 2014-11-27 | 2016-06-02 | 한라아이엠에스 주식회사 | Filter having backwash nozzle with improved backwash performance for ballast water treatment apparatus |
| CN206560715U (en) * | 2017-03-15 | 2017-10-17 | 南京谷牛智能科技有限公司 | A kind of pressure difference automatic flushing filtering system |
| CN207421400U (en) * | 2017-11-13 | 2018-05-29 | 阳江核电有限公司 | A kind of tee valve type filter capable of washing |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111514638A (en) * | 2020-04-29 | 2020-08-11 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Marine filter equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102784504A (en) | Automatic backwashing system in filtering device with multi filter drums | |
| CN110975377A (en) | Shellfish catcher for nuclear power plant and fluid filtering method thereof | |
| CN216320316U (en) | Machine-mounted water filtering device capable of backwashing for heading machine | |
| CN109806651A (en) | It is a kind of outer into interior type Cydariform rotary filtering-net out | |
| CN111760339B (en) | Centrifugal separation device for suspended substances in continuous flowing liquid and chemical nickel plating liquid | |
| CN213790180U (en) | Filter device free of disassembly and washing | |
| CN211384046U (en) | Multi-chamber air back-flushing large-capacity filter | |
| CN212188091U (en) | Self-cleaning tube array type filter | |
| CN109316794B (en) | External blow-drying, washing and backwashing assembly of plate-and-frame filter press and cleaning method | |
| CN214234508U (en) | Vacuum centrifuge | |
| CN115581959A (en) | Filter and air conditioner water system washing and filtering device | |
| CN212440380U (en) | Rotary multi-cylinder dirt separator | |
| CN205886344U (en) | Reverse flushing pipe filter | |
| CN107321058B (en) | Filter element cleaning device | |
| CN211025387U (en) | Sewage filtering treatment equipment | |
| CN208193803U (en) | A kind of hydraulic motor-driven is from secondary cleaner | |
| CN217340358U (en) | Two-stage combined backwashing water filter | |
| CN220758215U (en) | Automatic filtering equipment for polyurethane waterproof coating processing | |
| CN217724836U (en) | Circulating hot galvanizing bath with filtering device | |
| CN220589137U (en) | Hydraulic drive self-cleaning filter | |
| CN219646933U (en) | Circulation tank for cleaning and processing oil field | |
| CN216259442U (en) | Back-cleaning oil filter with compact structure | |
| CN202802882U (en) | Automatic back-purge system in multiple-cartridge filter device | |
| CN215313181U (en) | Centrifugal machine | |
| CN218901088U (en) | Hydraulic driven automatic back flushing water filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200410 |
|
| RJ01 | Rejection of invention patent application after publication |