CN113018959A - Automatic backwashing filter device and backwashing method of low-temperature multi-effect seawater desalination system - Google Patents
Automatic backwashing filter device and backwashing method of low-temperature multi-effect seawater desalination system Download PDFInfo
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- CN113018959A CN113018959A CN202110326291.3A CN202110326291A CN113018959A CN 113018959 A CN113018959 A CN 113018959A CN 202110326291 A CN202110326291 A CN 202110326291A CN 113018959 A CN113018959 A CN 113018959A
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- 238000011001 backwashing Methods 0.000 title claims abstract description 84
- 239000013535 sea water Substances 0.000 title claims abstract description 62
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004140 cleaning Methods 0.000 claims abstract description 31
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 90
- 230000008569 process Effects 0.000 claims description 28
- 238000010992 reflux Methods 0.000 claims description 12
- 239000010865 sewage Substances 0.000 claims description 11
- 238000005273 aeration Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 9
- 239000012535 impurity Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 238000005422 blasting Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 238000005507 spraying Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims 1
- 238000005192 partition Methods 0.000 abstract description 14
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 235000015170 shellfish Nutrition 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
-
- 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
- B01D29/117—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 arranged for outward 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
- B01D29/50—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
- B01D29/52—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 in parallel connection
- B01D29/54—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 in parallel connection arranged concentrically or coaxially
-
- 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
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/606—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by pressure measuring
-
- 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
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
- B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a rotary movement with respect to the filtering element
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to the technical field of seawater desalination, in particular to an automatic backwashing filter device of a low-temperature multi-effect seawater desalination system, which comprises a first filter and a second filter and is characterized in that: the first filter and the second filter are connected with each other through a pipeline, the lower ends of the first filter and the second filter are respectively connected with a first pollution discharge control valve and a second pollution discharge control valve, filter cartridges are arranged inside the first filter and the second filter, a filter cartridge upper fixing partition plate is fixedly connected to the upper end of the filter cartridge, a filter cartridge lower fixing partition plate is fixedly connected to the lower end of the filter cartridge, and an upper variable-pitch impeller is mounted on the inner side of the filter cartridge upper fixing partition plate. After the method is implemented, the safe and stable operation of the seawater desalination device can be effectively guaranteed, and the nozzle disassembling and cleaning frequency is reduced.
Description
Technical Field
The invention relates to the technical field of seawater desalination, in particular to an automatic backwashing filter device of a low-temperature multi-effect seawater desalination system and a backwashing method thereof.
Background
At present, a low-temperature multi-effect seawater desalination device refers to a desalination technology that the highest evaporation temperature of original seawater is below 70 ℃, and is characterized in that a series of evaporators containing spray pipe bundles are connected in series, a certain amount of steam is input to the evaporators to be subjected to multiple evaporation and condensation, the evaporation temperature of the latter effect is lower than that of the former effect, and the former effect is subjected to multiple evaporation and condensation, so that a process of desalinating water with the amount of multiple times of the steam is obtained. In the low-temperature multi-effect seawater desalination heat exchange process, raw seawater or concentrated seawater is uniformly distributed on the outer surface of a heat exchange tube bundle of each evaporator through a nozzle by a feeding system and is in film distribution, the raw seawater or the concentrated seawater flows from top to bottom, part of the seawater absorbs latent heat of condensed steam in the heat exchange tubes to be vaporized, the rest concentrated seawater is pumped into the next effect group of the evaporator by a feeding pump, and the process is repeated to realize the production process of desalinated water.
Because the low-temperature multi-effect seawater desalination system has lower requirement on the turbidity of the effluent of the seawater pretreatment (generally not higher than 15NTU), along with the long-term use of the seawater pretreatment system, the silt deposited in the coagulating sedimentation tank and the clean water tank enters a feeding system and a spraying system of the seawater desalination device; in addition, because the inside anticorrosive coating of the sea fresh system effect body evaporator corrodes and drops, these slice granules mix with the silt that gets into surplus among the sea water desalination device, the basket filter is adopted at the beginning of the design of sea water desalination system, the filter screen does not set up the blowdown runner, very easily block local position mesh because of particulate matter in the operation process, cause concentrated sea water velocity of flow to slow down, lead to the silt siltation that mingles with inside the filter screen, cause the increase of filter import and export pressure differential, the flow reduces, influence sea water desalination device and make the water ratio, and cause the nozzle to block up, and then lead to the water distribution inequality, the shower fracture, vapour (heat source), water (cold source) area of contact reduces, heat exchange efficiency reduces, the heat exchange.
The existing cleaning mode can only remove the upper end cover of the filter manually, take out the filter screen for external cleaning, the implementation process is complex, especially the operation process of cleaning the filter screen during the operation of the seawater desalination device brings great hidden danger to the continuous safe and stable operation of equipment, the implementation process is difficult, time-consuming, labor-consuming and high in labor cost, great construction safety risks and a great number of uncontrollable factors exist, and the effect of the manual mechanical cleaning method is not ideal.
Therefore, an automatic backwashing filter device of a low-temperature multi-effect seawater desalination system and a backwashing method thereof, which can solve the problems, are needed.
Disclosure of Invention
The invention mainly aims at the problems that the raw seawater and shellfish, paint skin, silt and other impurity substances mixed in concentrated seawater at all levels in a feeding system of a low-temperature multi-effect seawater desalination device block a nozzle, so that the water distribution is uneven, a spray pipe is broken, the contact area of steam and water is reduced, the heat exchange efficiency is reduced, a heat exchange pipe is scaled and the like. The automatic backwashing filter device and the backwashing method thereof for the low-temperature multi-effect seawater desalination system can effectively ensure the safe and stable operation of the seawater desalination system after implementation, and reduce the nozzle disassembling and cleaning frequency.
The technical scheme adopted by the invention for solving the technical problems is as follows: the automatic backwashing filter device of the low-temperature multi-effect seawater desalination system comprises a first filter and a second filter, wherein the first filter and the second filter are connected with each other through a pipeline, the lower ends of the first filter and the second filter are respectively connected with a first pollution discharge control valve and a second pollution discharge control valve, filter cartridges are arranged in the first filter and the second filter, a filter cartridge upper fixing partition plate is fixedly connected to the upper end of the filter cartridge, a filter cartridge lower fixing partition plate is fixedly connected to the lower end of the filter cartridge, an upper variable-pitch impeller is arranged on the inner side of the filter cartridge upper fixing partition plate, a lower variable-pitch impeller is arranged on the outer side of the filter cartridge lower fixing partition plate, a rotational flow guide rod is arranged in the filter cartridge, and a plurality of rotational flow blades are arranged on the rotational flow guide rod.
Furthermore, the first filter and the second filter are respectively provided with an inlet end and an outlet end, the inlet ends of the first filter and the second filter are respectively provided with a first water inlet control valve and a second water inlet control valve, and the outlet ends of the first filter and the second filter are respectively provided with a first water outlet control valve and a second water outlet control valve.
Further, install first import pressure transmitter on the inlet end of first filter, install first export pressure transmitter on the outlet end of first filter, install second import pressure transmitter on the inlet end of second filter, install second export pressure transmitter on the outlet end of second filter.
Furthermore, the filter cartridge is a vertically through cylindrical filter screen, and a plurality of reinforcing ribs are arranged in the filter screen.
Further, an aeration disturbance cylinder is arranged outside the filter cylinder, and the internal structure of the aeration disturbance cylinder is a hollow air hole sieve used for distributing impact generated in the compressed gas blasting process to remove stubborn impurity particles attached to the filter cylinder.
Furthermore, a thrust bearing is installed inside the filter cylinder, and the upper variable-pitch impeller and the lower variable-pitch impeller are coaxially connected to the upper end and the lower end of the thrust bearing.
Furthermore, a circulating reflux pump is installed on one side of the filter cylinder and used for pushing the upper variable-pitch blades.
Further, the top parts of the first filter and the second filter are both connected with exhaust control valves.
Furthermore, one side of the first filter and one side of the second filter are both connected with a circulating thrust pump, and the circulating thrust pump is used for pushing the rotational flow blades arranged on the rotational flow guide rod.
A backwashing method of an automatic backwashing filter device of a low-temperature multi-effect seawater desalination system is characterized by comprising the following steps:
s1: the method comprises the steps that firstly, a first filter and a second filter run simultaneously, at the moment, a first water inlet control valve, a second water inlet control valve, a first water outlet control valve and a second water outlet control valve are both in an open state, a first blowdown control valve and a second blowdown control valve are in a closed state, and raw seawater or concentrated seawater flows in through inlet ends of the first filter and the second filter and flows out from outlet ends of the first filter and the second filter.
S2: the operation load is high, and the backwashing process of the filter in the operation state is as follows: the first filter operates normally and the second filter operates in a backwashing state, at the moment, the first water inlet control valve and the second water inlet control valve are in an opening state, the second sewage control valve is in an opening state, and at the moment, the control system adjusts:
(1) the direction of the blades of the upper and lower variable pitch impellers is adjusted to be perpendicular to the water flow to form maximum thrust to drive a filter cylinder driving shaft and a filter cylinder cleaning brush;
(2) the circulating thrust pump pushes the cyclone blades arranged on the cyclone guide rod, so that the rotary power is transmitted to the filter cylinder driving shaft through the forward driving gear and enters and the filter cylinder cleaning brush to perform the operation backwashing operation process; backwashing sewage is discharged through the second blowdown control valve of the filter tank body, the running state is recovered after the washing is finished, and the control system automatically adjusts the first water inlet control valve and the second water inlet control valve according to the flow requirement, and the opening degree of the first water outlet control valve and the opening degree of the second water outlet control valve.
S3: the operation load is low, and the backwashing process of the filter in the shutdown state comprises the following steps: the first filter is normally operated and the second filter is stopped to be backwashed, the first water inlet control valve, the second water inlet control valve, the first water outlet control valve, the air source control valve and the exhaust control valve are all in an open state at the moment, the second water outlet control valve is in a closed state, the second sewage control valve is in an open state, and the control system adjusts the conditions at the moment:
(1) the direction of adjusting blades of the upper variable-pitch impeller and the lower variable-pitch impeller is perpendicular to the water flow to form maximum thrust to drive a filter cylinder driving shaft and a filter cylinder cleaning brush;
(2) the circulating thrust pump pushes the rotational flow blades arranged on the rotational flow guide rod, and then the rotary power is transmitted to the filter cylinder driving shaft and the filter cylinder cleaning brush through the forward driving gear;
(3) the aeration disturbance cylinder removes stubborn impurity particles attached to the filter cartridge under the impact action generated in the blasting process of distributing compressed gas;
(4) the circulating reflux pump pushes upper variable pitch blades of the filter cylinder driving shaft and is used for forming auxiliary thrust to drive the rotational flow blades so as to balance and transmit rotary power to the plurality of filter cylinder driving shafts and the filter cylinder cleaning brushes through the forward driving gear to carry out the operation process of shutdown backwashing; backwashing sewage is discharged through the second blowdown control valve of the filter tank body, the running state is recovered after the washing is finished, and the control system automatically adjusts the opening degree of the first water inlet control valve and the opening degree of the second water inlet control valve and the opening degree of the first water outlet control valve and the opening degree of the second water outlet control valve according to the flow requirement.
S4: the control system can automatically control the backwashing operation flow of the filter according to the feedback data of the pressure transmitter at the inlet and the outlet of the filter and the load state of the seawater desalination device, and can specifically realize the following steps:
(1) the two filters operate simultaneously;
(2) one filter operates, and the other filter operates for backwashing;
(3) both the two filters are in backwashing operation;
(4) one filter operates, the other filter stops running for backwashing, and in order to avoid the flow cutoff accidents of the feeding system and the spraying system, the control system sets a control logic to prohibit the two filters from being in a state of stopping running for backwashing at the same time.
The invention has the advantages that: compared with the prior art, the invention has the following advantages and effects:
1. after the device is implemented, the safe and stable operation of the seawater desalination device can be effectively guaranteed, and the disassembly and cleaning frequency of the nozzles is reduced.
2. The invention can automatically control the backwashing operation flow of the filter according to the feedback data of the pressure transmitter at the inlet and the outlet of the filter and the load state of the seawater desalination device, and can concretely realize that:
(1) the two filters operate simultaneously;
(2) one filter operates, and the other filter operates for backwashing;
(3) both the two filters are in backwashing operation;
(4) one filter is running and the other filter is off backwashing.
In order to avoid the flow cutoff accidents of the feeding system and the spraying system, the control system sets a control logic to prohibit the two filters from being in a shutdown backwashing state at the same time.
3. The invention has the advantages of small floor area, good filtering effect, simple cleaning process, short shutdown period and high automation degree, and can realize continuous, efficient and stable operation.
4. The aeration disturbance cylinders are respectively arranged outside the filter cylinders, and are provided with internal hollow pore sieves for distributing impact generated in the compressed gas blasting process to remove stubborn impurity particles attached to the filter cylinders.
5. The upper variable-pitch impeller and the lower variable-pitch impeller can freely adjust the direction of the blades according to the instruction of a control system, the vertical midpoint of the upper variable-pitch impeller coincides with the vertical midpoint of the fixed partition plate on the filter cylinder, and the vertical midpoint of the lower variable-pitch impeller coincides with the vertical midpoint of the fixed partition plate under the filter cylinder, so that the water flow entering the filter cylinder forms the maximum thrust through the arrangement position of the impellers, and the maximum thrust is used for driving the upper variable-pitch impeller and the lower variable-pitch impeller to drive the drive shaft of the filter cylinder and.
6. The rotational flow guide rod is positioned at the center of the filter structure, rotational flow blades are arranged at the bottom of the rotational flow guide rod, the rotational flow blades arranged on the rotational flow guide rod are pushed by the circulating thrust pump, and then the rotational power of the rotational flow guide rod is transmitted to the filter cylinder driving shafts and the filter cylinder cleaning brushes in a balanced manner through the forward driving gear, so that the backwashing operation process is synchronously implemented.
7. The circulating reflux pump is arranged in a water inlet chamber of the filter, and an outlet pipeline of the circulating reflux pump directly corresponds to the upper variable-pitch blades of the filter cylinder driving shaft and is used for forming auxiliary thrust to drive the rotational flow blades so as to evenly transmit rotary power to the filter cylinder driving shafts and the filter cylinder cleaning brushes through the forward driving gear.
8. The filter cartridge comprises a plurality of filter cartridge bodies, each filter cartridge body is a cylindrical filter screen which is through from top to bottom, and reinforcing ribs are arranged inside the filter screens and used for guaranteeing the strength and avoiding scouring deformation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
wherein:
1. a first filter; 2. a first water intake control valve; 3. a first water outlet control valve; 4. a first purge control valve; 5. a second filter; 6. a second water inlet control valve; 7. a second water outlet control valve; 8. a second blowdown control valve; 9. a first inlet pressure transmitter; 10. a first outlet pressure transmitter; 11. a second inlet pressure transmitter; 12. a second outlet pressure transmitter; 13. an exhaust control valve; 14. a clapboard is fixed on the filter cylinder; 15. a partition plate is fixed below the filter cylinder; 16. a filter cartridge; 17. a cartridge cleaning brush; 18. an aeration disturbance cylinder; 19. an upper variable-pitch impeller; 20. a lower variable-pitch impeller; 21. a thrust bearing; 22. a circulating thrust pump; 23. a forward drive gear; 24. a swirl guide rod; 25. a circulating reflux pump; 26. a gas source control valve; 27. a control system; 28. a reflux control valve; 29. an end cap compactor; 30. the end cover fixes the lock pin; 31. a cartridge drive shaft; 32. the end cover is fixed with a hinge;
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that unless otherwise explicitly specified or limited, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
FIG. 1 is a schematic structural diagram of the present invention, and as shown in FIG. 1, the automatic backwashing filter device of a low-temperature multiple-effect seawater desalination system comprises a first filter 1 and a second filter 5, wherein an upper variable-pitch impeller 19 and a lower variable-pitch impeller 20 in the present invention can freely adjust the blade direction according to the instruction of a control system 27, the vertical midpoint of the upper variable-pitch impeller 19 coincides with the vertical midpoint of a fixed partition plate 14 on a filter cartridge, the vertical midpoint of the lower variable-pitch impeller 20 coincides with the vertical midpoint of a fixed partition plate 15 under the filter cartridge, so as to ensure that the water flow entering the filter cartridge forms the maximum thrust through the impeller arrangement position, and the automatic backwashing filter device is used for driving the upper and lower variable-pitch impellers 20 to drive a filter cartridge driving shaft 31 and a filter cartridge cleaning brush 17 arranged at the upper part thereof to perform backwashing operation, a cyclone guide rod 24 in, further, the rotational power of the rotation guide rod is transmitted to the plurality of cartridge drive shafts 31 and the cartridge washing brushes 17 through the forward drive gear 23 in a balanced manner, and the backwashing operation is performed in synchronization.
Example 2:
fig. 1 is a schematic structural diagram of the present invention, and as shown in fig. 1, the automatic backwashing filtering apparatus of a low-temperature multiple-effect seawater desalination system comprises a first filter 1 and a second filter 5, wherein a circulation reflux pump 25 in the present invention is arranged in a water inlet chamber of the filters, an outlet pipeline of the circulation reflux pump directly corresponds to an upper variable pitch blade of a filter cartridge driving shaft 31, and is used for forming an auxiliary thrust to drive a rotational flow blade, so as to evenly transmit the rotational power to a plurality of filter cartridge driving shafts 31 and filter cartridge cleaning brushes 17 through a forward driving gear 23, the present invention is further provided with an end cover compressor 29, an end cover fixing lock pin 30, and an end cover fixing hinge 32, which are respectively arranged on a top end cover of the filters, wherein the end cover fixing hinge 32 is arranged on any one; the end cover fixing lock pin 30 is arranged on one side of the filter top end cover fixing hinge 32, which is symmetrical in position, and is used for assisting the end cover presser 29 to fix the filter end cover; the end cover compressor 29 comprises an end cover compression guide rod, an end cover compression handle, an end cover compression bolt and the like, the end cover compression bolt is located in the center of the spherical surface of the end cover of the filter and perpendicular to the spherical surface, the end cover of the filter is uniformly compressed or loosened by rotating the end cover compression handle, and in addition, the end cover compressor is matched with an end cover fixing hinge 32 and an end cover fixing lock pin 30 to realize the quick opening and closing of the end cover of the filter, so that the internal parts of the filter can be.
Example 3:
fig. 1 is a schematic structural diagram of the present invention, and as shown in fig. 1, the present invention is applicable to the fields of petroleum, chemical industry, water treatment and other industries, and the present invention is selected only for the field economic and practical situation, in which the first filter 1 and the second filter 5 in the present invention adopt a main pipe connection mode to realize mutual standby state, and can also freely adjust the filter application state according to the actual operation situation of the seawater desalination device, but at least one filter is ensured to be in the operation state; the invention is only selected for the field economic and practical situation, the invention comprises a plurality of filter cartridges 16, the thickness, the pore diameter, the pore opening rate and the like of the filter screen can be freely adjusted according to the actual situation, the invention is only selected for the field economic and practical situation, the end cover compactor 29, the end cover fixing lock pin 30 and the end cover fixing hinge 32 are respectively arranged on the top end cover of the filter, and the invention can be slightly changed on the basis to realize the quick opening and closing of the end cover of the filter, and the invention is only selected for the field economic and practical situation.
Example 4:
FIG. 1 is a schematic structural diagram of the present invention, and the automatic backwashing filter device of a low-temperature multiple-effect seawater desalination system shown in FIG. 1 comprises a first filter 1 and a second filter 5, which can be freely adjusted according to the operation state of the seawater desalination device, and the present invention is selected only for the field economic and practical situation, and the present invention can adopt other forms of aeration modes according to the specific practical situation, and the present invention is selected only for the field economic and practical situation, and comprises a plurality of filter cartridges 16, wherein the filter cartridges 16 are filter screens with a cylindrical structure which is permeable from top to bottom, and reinforcing ribs are arranged inside the filter screens for ensuring the strength and avoiding scouring deformation The invention can automatically control the backwashing operation flow of the filter according to the feedback data of the pressure transmitter at the inlet and the outlet of the filter and the load state of the seawater desalination device, and can specifically realize that (1) two filters run simultaneously; (2) one filter operates, and the other filter operates for backwashing; (3) both the two filters are in backwashing operation; (4) one filter is running and the other filter is off backwashing. In order to avoid the flow cutoff accidents of the feeding system and the spraying system, the control system 27 is provided with a control logic to prohibit the two filters from being in the shutdown backwashing state at the same time.
Example 5:
FIG. 1 is a schematic structural diagram of the present invention, and is a schematic view of an automatic backwashing filter device of a low-temperature multiple-effect seawater desalination system shown in FIG. 1, which comprises a first filter 1 and a second filter 5, wherein an upper variable-pitch impeller 19 and a lower variable-pitch impeller 20 can freely adjust the blade direction according to the instruction of a control system 27, the vertical midpoint of the upper variable-pitch impeller 19 coincides with the vertical midpoint of a fixed partition plate 14 on a filter cartridge, the vertical midpoint of the lower variable-pitch impeller 20 coincides with the vertical midpoint of a fixed partition plate 15 under the filter cartridge, so as to ensure that the water flow entering the filter cartridge forms the maximum thrust through the impeller arrangement position, and the automatic backwashing filter device is used for driving the upper and lower variable-pitch impellers 20 to drive a filter cartridge driving shaft 31 and a filter cartridge cleaning brush 17 arranged at the upper part thereof to perform backwashing operation, the present invention relates, and further, the rotary power of the rotary guide rod is transmitted to the plurality of filter cylinder driving shafts 31 and the filter cylinder cleaning brushes 17 through the forward driving gear 23 in a balanced manner, the backwashing operation process is synchronously performed, and the outlet pipeline of the rotary guide rod directly corresponds to the upper variable pitch blades of the filter cylinder driving shafts 31 and is used for forming auxiliary thrust to drive the rotational flow blades so as to transmit the rotary power to the plurality of filter cylinder driving shafts 31 and the filter cylinder cleaning brushes 17 through the forward driving gear 23 in a balanced manner.
Example 6:
fig. 1 is a schematic structural diagram of the present invention, and the automatic backwashing filter device of the low-temperature multiple-effect seawater desalination system shown in fig. 1 comprises a first filter 1 and a second filter 5, and the present invention further comprises an end cover compressor 29, an end cover fixing lock pin 30, and an end cover fixing hinge 32, which are respectively arranged on the top end cover of the filter, wherein the end cover fixing hinge 32 is arranged on any one contact joint surface of the top end cover of the filter, and is used for providing a supporting fulcrum in the process of turning and opening the end cover of the filter; the end cover fixing lock pin 30 is arranged on one side of the filter top end cover fixing hinge 32, which is symmetrical in position, and is used for assisting the end cover presser 29 to fix the filter end cover; the end cover compressor 29 comprises an end cover compression guide rod, an end cover compression handle, an end cover compression bolt and the like, the end cover compression bolt is located in the center of the spherical surface of the end cover of the filter and perpendicular to the spherical surface, the end cover compression handle is rotated to uniformly compress or loosen the end cover of the filter, in addition, the end cover compression bolt is matched with the end cover fixing hinge 32 and the end cover fixing lock pin 30 to realize the quick opening and closing of the end cover of the filter, the internal parts of the filter are convenient to replace and check, the filter cartridge 16 is a filter screen with an upper and lower through columnar structure, and.
The working mode is as follows: the invention comprises the following steps when in use:
s1: first, the first filter 1 and the second filter 5 operate simultaneously, at this time, the first water inlet control valve 2, the second water inlet control valve 6, the first water outlet control valve 3, and the second water outlet control valve 7 are all in an open state, the first blowdown control valve 4 and the second blowdown control valve 8 are in a closed state, and raw seawater or concentrated seawater flows in through inlet ends of the first filter 1 and the second filter 5 and flows out from outlet ends of the first filter 1 and the second filter 5.
S2: the operation load is high, and the backwashing process of the filter in the operation state is as follows: the first filter 1 operates normally and the second filter 5 operates in a backwashing state, at this time, the first water inlet control valve 2, the second water inlet control valve 6, the first water outlet control valve 3, and the second water outlet control valve 7 are all in an open state, the second pollution discharge control valve 8 is in an open state, and at this time, the control system 27 adjusts:
(1) the blade direction of the upper and lower variable-pitch impellers 20 is adjusted to be perpendicular to the water flow to form the maximum thrust to drive the filter cylinder driving shaft 31 and the filter cylinder cleaning brush 17;
(2) the circulating thrust pump 22 pushes the cyclone blades arranged on the cyclone guide rod 24, and then the rotary power is transmitted to the filter cylinder driving shaft 31 and the filter cylinder cleaning brush 17 through the forward driving gear 23 to carry out the operation backwashing operation process; the backwashing sewage is discharged through the second blowdown control valve 8 of the filter tank body, the running state is recovered after the washing is finished, and the control system 27 automatically adjusts the first water inlet control valve 2, the second water inlet control valve 6, the opening degree of the first water outlet control valve 3 and the opening degree of the second water outlet control valve 7 according to the flow demand.
S3: the operation load is low, and the backwashing process of the filter in the shutdown state comprises the following steps: when the first filter 1 is in normal operation and the second filter 5 is in a stop operation and backwashing state, the first water inlet control valve 2, the second water inlet control valve 6, the first water outlet control valve 3, the air source control valve 26 and the exhaust control valve 13 are all in an open state, the second water outlet control valve 7 is in a closed state, the second pollution discharge control valve 8 is in an open state, and the control system 27 adjusts:
(1) the blade adjusting directions of the upper variable-pitch impeller 19 and the lower variable-pitch impeller 20 are perpendicular to the water flow to form the maximum thrust to drive the filter cylinder driving shaft 31 and the filter cylinder cleaning brush 17;
(2) the circulating thrust pump 22 pushes the swirl vanes provided on the swirl guide rod 24, and further transmits the rotational power to the filter cartridge drive shaft 31 and the filter cartridge cleaning brush 17 through the forward drive gear 23;
(3) the aeration disturbance cylinder 18 removes stubborn impurity particles attached to the filter cartridge 16 by the impact generated in the blasting process of the distributed compressed gas;
(4) the circulating reflux pump 25 pushes the upper variable pitch blades of the filter cylinder driving shaft 31 and is used for forming auxiliary thrust to drive the rotational flow blades so as to evenly transmit the rotary power to the plurality of filter cylinder driving shafts 31 and the filter cylinder cleaning brushes 17 through the forward driving gear 23 to carry out the operation process of shutdown and backwashing; the backwashing sewage is discharged through the second blowdown control valve 8 of the filter tank body, the running state is recovered after the washing is finished, and the control system 27 automatically adjusts the opening degrees of the first water inlet control valve 2, the second water inlet control valve 6, the first water outlet control valve 3 and the second water outlet control valve 7 according to the flow demand.
S4: the control system 27 can automatically control the backwashing operation flow of the filter according to the feedback data of the pressure transmitter at the inlet and the outlet of the filter and the load state of the seawater desalination device, and can specifically realize the following steps:
(1) the two filters operate simultaneously;
(2) one filter operates, and the other filter operates for backwashing;
(3) both the two filters are in backwashing operation;
(4) one filter is operated, the other filter is stopped for backwashing, and in order to avoid the flow cutoff accidents of the feeding system and the spraying system, the control system 27 is provided with a control logic for prohibiting the two filters from being in a stopped backwashing state at the same time.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides an automatic backwash filter equipment of low temperature multiple effect seawater desalination system, includes first filter (1) and second filter (5), its characterized in that: the first filter (1) and the second filter (5) are connected with each other through a pipeline, the lower ends of the first filter (1) and the second filter (5) are respectively connected with a first pollution discharge control valve (4) and a second pollution discharge control valve (8), the first filter (1) and the second filter (5) are both internally provided with a filter cartridge (16), the upper end of the filter cartridge (16) is fixedly connected with a cartridge upper fixed clapboard (14), the lower end of the filter cartridge (16) is fixedly connected with a cartridge lower fixed clapboard (15), an upper variable-pitch impeller (19) is arranged on the inner side of the fixed clapboard (14) on the filter cylinder, a lower variable-pitch impeller (20) is arranged on the outer side of the fixed clapboard (15) below the filter cylinder, a swirl guide rod (24) is arranged in the filter cartridge (16), and a plurality of swirl vanes are mounted on the swirl guide rod (24).
2. The automatic backwashing filter device of the low-temperature multi-effect seawater desalination system of claim 1, which is characterized in that: the filter is characterized in that the first filter (1) and the second filter (5) are respectively provided with an inlet end and an outlet end, the inlet ends of the first filter (1) and the second filter (5) are respectively provided with a first water inlet control valve (2) and a second water inlet control valve (6), and the outlet ends of the first filter (1) and the second filter (5) are respectively provided with a first water outlet control valve (3) and a second water outlet control valve (7).
3. The automatic backwashing filter device of the low-temperature multi-effect seawater desalination system of claim 2, which is characterized in that: install first inlet pressure transmitter (9) on the inlet end of first filter (1), install first outlet pressure transmitter (10) on the outlet end of first filter (1), install second inlet pressure transmitter (11) on the inlet end of second filter (5), install second outlet pressure transmitter (12) on the outlet end of second filter (5).
4. The automatic backwashing filter device of the low-temperature multi-effect seawater desalination system of claim 1, which is characterized in that: the filter cartridge (16) is a cylindrical filter screen which is through from top to bottom, and a plurality of reinforcing ribs are arranged in the filter screen.
5. The automatic backwashing filter device of the low-temperature multi-effect seawater desalination system of claim 4, which is characterized in that: an aeration disturbance cylinder (18) is arranged outside the filter cylinder (16), and the internal structure of the aeration disturbance cylinder (18) is a hollow air hole sieve used for removing stubborn impurity particles attached to the filter cylinder (16) by the impact generated in the compressed gas blasting process.
6. The automatic backwashing filter device of the low-temperature multi-effect seawater desalination system of claim 4, which is characterized in that: a thrust bearing (21) is installed inside the filter cylinder (16), and the upper variable-pitch impeller (19) and the lower variable-pitch impeller (20) are coaxially connected to the upper end and the lower end of the thrust bearing (21).
7. The automatic backwashing filter device of the low-temperature multi-effect seawater desalination system of claim 1, which is characterized in that: and a circulating reflux pump (25) is installed on one side of the filter cartridge (16), and the circulating reflux pump (25) is used for pushing the upper variable-pitch blade.
8. The automatic backwashing filter device of the low-temperature multi-effect seawater desalination system of claim 1, which is characterized in that: the tops of the first filter (1) and the second filter (5) are both connected with an exhaust control valve (13).
9. The automatic backwashing filter device of the low-temperature multi-effect seawater desalination system of claim 1, which is characterized in that: and one sides of the first filter (1) and the second filter (5) are both connected with a circulating thrust pump (22), and the circulating thrust pump (22) is used for pushing swirl blades arranged on a swirl guide rod (24).
10. A backwashing method of an automatic backwashing filter device of a low-temperature multi-effect seawater desalination system is characterized by comprising the following steps:
s1: firstly, a first filter (1) and a second filter (5) run simultaneously, at the moment, a first water inlet control valve (2), a second water inlet control valve (6), a first water outlet control valve (3) and a second water outlet control valve (7) are in an open state, a first sewage discharge control valve (4) and a second sewage discharge control valve (8) are in a closed state, and raw seawater or concentrated seawater flows in through inlet ends of the first filter (1) and the second filter (5) and flows out from outlet ends of the first filter (1) and the second filter (5).
S2: the operation load is high, and the backwashing process of the filter in the operation state is as follows: the first filter (1) operates normally and the second filter (5) operates in a backwashing state, at the moment, the first water inlet control valve (2) and the second water inlet control valve (6), the first water outlet control valve (3) and the second water outlet control valve (7) are in an opening state, the second pollution discharge control valve (8) is in an opening state, and at the moment, the control system (27) adjusts:
(1) the blade direction of the upper and lower variable-pitch impellers (20) is adjusted to be vertical to the water flow to form the maximum thrust to drive a filter cylinder driving shaft (31) and a filter cylinder cleaning brush (17);
(2) the circulating thrust pump (22) pushes the cyclone blades arranged on the cyclone guide rod (24) so as to transmit rotary power to the filter cylinder driving shaft (31) through the forward driving gear (23) and to enter the filter cylinder cleaning brush (17) for operation and backwashing operation; backwashing sewage is discharged through a second sewage control valve (8) of the filter tank body, the running state is restored after the washing is finished, and a control system (27) automatically adjusts the first water inlet control valve (2), the second water inlet control valve (6), the opening degree of the first water outlet control valve (3) and the opening degree of the second water outlet control valve (7) according to the flow demand.
S3: the operation load is low, and the backwashing process of the filter in the shutdown state comprises the following steps: the first filter (1) normally operates and the second filter (5) stops operating and backwashing, at the moment, the first water inlet control valve (2), the second water inlet control valve (6), the first water outlet control valve (3), the air source control valve (26) and the exhaust control valve (13) are all in an open state, the second water outlet control valve (7) is in a closed state, the second pollution discharge control valve (8) is in an open state, and at the moment, the control system (27) adjusts:
(1) the direction of blades of the upper variable-pitch impeller (19) and the lower variable-pitch impeller (20) is adjusted to be perpendicular to water flow to form maximum thrust to drive a filter cylinder driving shaft (31) and a filter cylinder cleaning brush (17);
(2) the circulating thrust pump (22) pushes the cyclone blades arranged on the cyclone guide rod (24) so as to transmit rotary power to the filter cylinder driving shaft (31) and the filter cylinder cleaning brush (17) through the forward driving gear (23);
(3) the aeration disturbance cylinder (18) removes stubborn impurity particles attached to the filter cartridge (16) by the impact generated in the blasting process of the distributed compressed gas;
(4) the circulating reflux pump (25) pushes upper variable pitch blades of the filter cylinder driving shaft (31) to form auxiliary thrust to drive the rotational flow blades so as to further balance the transmission of the rotary power to the plurality of filter cylinder driving shafts (31) and the filter cylinder cleaning brushes (17) through the forward driving gear (23) to carry out the operation process of shutdown and backwashing; backwashing sewage is discharged through the second blowdown control valve (8) of the filter tank body, the running state is restored after the washing is finished, and the control system (27) automatically adjusts the opening degrees of the first water inlet control valve (2), the second water inlet control valve (6), the first water outlet control valve (3) and the second water outlet control valve (7) according to the flow demand.
S4: the control system (27) can automatically control the backwashing operation flow of the filter according to the feedback data of the pressure transmitter at the inlet and the outlet of the filter and the load state of the seawater desalination device, and can specifically realize the following steps:
(1) the two filters operate simultaneously;
(2) one filter operates, and the other filter operates for backwashing;
(3) both the two filters are in backwashing operation;
(4) one filter operates, the other filter stops running for backwashing, and in order to avoid the flow cutoff accidents of the feeding system and the spraying system, the control system (27) is provided with a control logic for prohibiting the two filters from being in a state of stopping running for backwashing at the same time.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110326291.3A CN113018959A (en) | 2021-03-26 | 2021-03-26 | Automatic backwashing filter device and backwashing method of low-temperature multi-effect seawater desalination system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110326291.3A CN113018959A (en) | 2021-03-26 | 2021-03-26 | Automatic backwashing filter device and backwashing method of low-temperature multi-effect seawater desalination system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521836A (en) * | 2021-08-17 | 2021-10-22 | 中煤科工集团重庆研究院有限公司 | Multiple monitoring filtering and backwashing system and automatic regulation and control mode thereof |
| CN115445298A (en) * | 2022-08-15 | 2022-12-09 | 中核核电运行管理有限公司 | Nuclear power plant main pump shaft seal water riser rotates filter screen formula corrosion product eduction gear |
-
2021
- 2021-03-26 CN CN202110326291.3A patent/CN113018959A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113521836A (en) * | 2021-08-17 | 2021-10-22 | 中煤科工集团重庆研究院有限公司 | Multiple monitoring filtering and backwashing system and automatic regulation and control mode thereof |
| CN115445298A (en) * | 2022-08-15 | 2022-12-09 | 中核核电运行管理有限公司 | Nuclear power plant main pump shaft seal water riser rotates filter screen formula corrosion product eduction gear |
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