CN111392956B - Induced crystallization chemical softening device - Google Patents
Induced crystallization chemical softening device Download PDFInfo
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- CN111392956B CN111392956B CN202010411203.5A CN202010411203A CN111392956B CN 111392956 B CN111392956 B CN 111392956B CN 202010411203 A CN202010411203 A CN 202010411203A CN 111392956 B CN111392956 B CN 111392956B
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- 238000002425 crystallisation Methods 0.000 title claims abstract description 131
- 230000008025 crystallization Effects 0.000 title claims abstract description 131
- 239000000126 substance Substances 0.000 title claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 218
- 238000001914 filtration Methods 0.000 claims abstract description 162
- 239000003814 drug Substances 0.000 claims abstract description 41
- 238000007790 scraping Methods 0.000 claims abstract description 40
- 230000008093 supporting effect Effects 0.000 claims abstract description 10
- 239000013078 crystal Substances 0.000 claims description 58
- 239000002245 particle Substances 0.000 claims description 38
- 238000009826 distribution Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 33
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 238000013461 design Methods 0.000 abstract description 8
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 abstract description 6
- 229910001424 calcium ion Inorganic materials 0.000 abstract description 6
- 239000002455 scale inhibitor Substances 0.000 abstract description 6
- 239000002244 precipitate Substances 0.000 abstract description 3
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 17
- 238000004140 cleaning Methods 0.000 description 16
- 238000000034 method Methods 0.000 description 12
- 238000011010 flushing procedure Methods 0.000 description 7
- 239000010419 fine particle Substances 0.000 description 6
- 230000001680 brushing effect Effects 0.000 description 5
- 230000001939 inductive effect Effects 0.000 description 5
- 239000010802 sludge Substances 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 4
- 230000004323 axial length Effects 0.000 description 4
- 238000005243 fluidization Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 3
- 238000011001 backwashing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 238000005189 flocculation Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 230000006911 nucleation Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000012297 crystallization seed Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011369 optimal treatment Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001223 reverse osmosis Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Filtration Of Liquid (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention provides an induced crystallization chemical softening device, which comprises a water collecting area (1), a circulating crystallization area (2), a filtering area (3), a mud scraping system (4) connected with the inside of the filtering area (3) and supporting legs (5) arranged at the outer side of the bottom of the filtering area (3), wherein the water collecting area (1), the circulating crystallization area (2) and the filtering area (3) form an integrated structure; the filtering area (3) comprises a filtering outer cavity (31), a lower filtering unit (32), an upper filtering unit (33) and a medicine distributing component (34) which are vertically arranged; the mud scraping system (4) comprises an upper scraper (43) and a lower scraper (44). The device adopts an integrated design concept, comprises the function of stabilizing scale inhibitor, and can greatly precipitate and intercept SS in the circulating water sewage to provide cleaner water inlet for subsequent reaction; the upper and lower filtering units can be cleaned respectively without stopping the machine; the circulating sewage can greatly reduce the concentration of calcium ions in the water body through induced crystallization reaction.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to an induced crystallization chemical softening device.
Background
After the concentrated multiplying power of current thermal power factory circulating water system promoted, the circulation blowdown water yield reduced, leads to circulation blowdown water quality of water to worsen simultaneously. The common process for treating the circulating sewage is a high-density sedimentation tank → a variable pore filter tank → ultrafiltration → a reverse osmosis process, and the high-density sedimentation tank usually needs a larger tank body due to lower filtration speed, so that the large floor area is needed. Meanwhile, because a large amount of scale inhibitor is added into the circulating water to control the scaling tendency of the circulating water, a large amount of scale inhibitor components are often contained in the circulating sewage, and the softening effect of the high-density sedimentation tank is influenced by the existence of the scale inhibitor. In addition, SS (remark: SS is Suspended solids) in the circulating sewage greatly influences the treatment effect of chemical softening, and in actual engineering, in order to achieve the optimal treatment effect and crystallization effect of the chemical softening process, the SS of inlet water is required to be less than 50mg/L or lower. Under the condition of high SS of inlet water, in the process of inducing crystallization reaction, a part of crystals can be crystallized on SS particles, and the corresponding particles are smaller or have insufficient strength and are discharged out of the reactor along with water flow, so that the turbidity of outlet water is higher, the burden and the back flushing frequency of a subsequent filtering system are increased, and the crystallization efficiency and the recovery rate of crystallized products are reduced to a certain extent. Therefore, the development of a chemical softening device which has small occupied area, can break the stability of the scale inhibitor and can treat high-SS inflow water is a problem to be solved by the technical personnel in the field.
In the prior art, a security filter is often arranged to intercept SS of water from a crystallization device, and practical application finds that the following three defects exist: firstly, the filter element of the security filter has long service life, and the filter element needs to be replaced manually after the filter element blocks dirt and blockage to a certain degree; secondly, when the filter element is replaced manually, the system needs to be shut down; and thirdly, new pollutants which are difficult to treat are formed after the filter element for intercepting the dirt blockage is abandoned. In addition, in the conventional scraper type filtering structure, the scraper can only scrape and brush the inner wall of the filter cylinder, and dirt and blockage in the filter holes are difficult to remove.
Disclosure of Invention
The invention adopts an integrated design idea, combines the filtering device and the induced crystallization device, and improves the flow rate of crystallization, thereby reducing the occupied area of equipment and being convenient for maintenance. The device is designed with the scale inhibitor stability-breaking function, and can greatly precipitate and intercept SS in the circulating water sewage, thereby providing cleaner water inlet for the subsequent induced crystallization reaction. Meanwhile, the device can realize that the system does not stop running during cleaning, the filter screen can be immediately put into use without manually replacing the filter screen after being cleaned, and the self back washing function of the filter device can realize that the water flow of the filter outer cavity carries out back washing on the filter holes of the filter cylinder, thereby greatly reducing the generation of new pollutants compared with a cartridge filter element of a security filter.
After the induced crystallization seed crystals are added into the circulating sewage of the integrated device, substances generated by chemical reaction form fine particle precipitates in modes of agglomeration among fine particles, adsorption among fine particles and seed crystals, aggregation among seed crystals and the like. The crystalline particles will grow gradually in the presence of crystallization-inducing seeds.
The invention provides an induced crystallization chemical softening device, which comprises a water collecting area, a circulating crystallization area, a filtering area, a mud scraping system and supporting legs, wherein the water collecting area, the circulating crystallization area and the filtering area are arranged from top to bottom;
the circulating crystallization area comprises an inner cylinder, an outer cylinder arranged outside the inner cylinder, an outer cylinder bottom arranged at the bottom of the outer cylinder and a non-return part arranged in the center of the outer cylinder bottom, wherein an inlet of the non-return part is arranged at the top of the filtering area, an outlet of the non-return part is arranged at the bottom of the circulating crystallization area, the circulating crystallization area is communicated with the water collecting area, and the circulating crystallization area is communicated with the filtering area through the non-return part;
the filtering area comprises a filtering outer cavity, and a lower filtering unit, an upper filtering unit and a medicine distributing component which are arranged in the filtering outer cavity from bottom to top in sequence, wherein the lower filtering unit is hermetically connected with the bottom of the filtering outer cavity, a channel is reserved on the side part of the lower filtering unit, the upper filtering unit is vertically connected above the lower filtering unit, channels are reserved on the upper part and the side part of the filtering outer cavity, and the upper filtering unit is not communicated with the lower filtering unit;
the mud scraping system comprises a driving motor arranged in the center of the outer side of the bottom of the filtering area, a driving shaft connected with the driving motor, an upper scraper connected to the upper portion of the driving shaft and located inside the upper filtering unit, and a lower scraper connected to the lower portion of the driving shaft and located inside the lower filtering unit.
As a preferable mode, the mud scraping system further comprises a clockwise overrunning clutch and a counterclockwise overrunning clutch, the clockwise overrunning clutch is connected with the driving shaft and the upper scraping plate, the counterclockwise overrunning clutch is connected with the driving shaft and the lower scraping plate, and the upper scraping plate and the lower scraping plate are both composed of hollow square frame-shaped structures.
The invention relates to an induced crystallization chemical softening device, which is characterized in that an upper filtering unit comprises an upper filtering cylinder, an upper water inlet part fixed at the top in the upper filtering cylinder and an upper sludge discharge pipe communicated with the bottom of the upper filtering cylinder; the lower filtering unit comprises a lower filtering cylinder, a lower water inlet component fixed at the top in the lower filtering cylinder and a lower mud discharge pipe communicated with the bottom of the lower filtering cylinder; the side surfaces of the upper filter cylinder and the lower filter cylinder are provided with a plurality of filter holes which are uniformly distributed, and the upper filter cylinder and the lower filter cylinder are communicated with the outer filter cavity through the filter holes;
the upper water inlet component comprises an upper water inlet pipe, an annular upper water inlet channel connected to the tail end of the upper water inlet pipe and a plurality of upper water outlet pipes which are arranged obliquely and downwards at the bottom of the upper water inlet channel and are uniformly arranged; the lower water inlet component comprises a lower water inlet pipe, an annular lower water inlet channel connected to the tail end of the lower water inlet pipe and a plurality of lower water outlet pipes which are arranged at the bottom of the lower water inlet channel and are uniformly arranged in a downward inclined mode.
According to the induced crystallization chemical softening device, as a preferable mode, the filter holes are round holes, square holes or rectangular holes.
The invention relates to an induced crystallization chemical softening device, which is characterized in that a medicine distribution part comprises a medicine inlet pipe, an annular medicine inlet channel communicated with the medicine inlet pipe and a plurality of medicine outlet pipes uniformly extending out of the periphery of the annular medicine inlet channel.
According to the chemical softening device for induced crystallization, disclosed by the invention, as a preferable mode, a plurality of magnetic rods are vertically and uniformly arranged in the filtering outer cavity and the channels at the side parts of the lower filtering unit and the upper filtering unit.
The invention relates to an induced crystallization chemical softening device, which is a preferable mode, wherein the circulating crystallization area further comprises a flow guide part arranged in the center of the bottom of the outer cylinder and a crystal particle discharge pipe arranged on the outer side of the bottom of the flow guide part, the cross section of the flow guide part is smooth W-shaped, and a through hole for a non-return part to pass through is reserved in the center of the flow guide part;
the inner barrel is fixed in the outer barrel in a hanging mode and does not have a barrel bottom, a flow guide ring with a bottom structure and a large upper structure is arranged between the upper portion of the inner barrel and the outer barrel, the upper portion of the flow guide ring is of a cylindrical structure and extends upwards to the top of a water collecting area, an upflow channel is formed inside the inner barrel, and the flow guide ring, the outer wall of the inner barrel, the inner wall of the outer barrel and a flow guide component form a downflow channel.
The invention relates to an induced crystallization chemical softening device, which is a preferable mode, wherein a water collecting area comprises a barrel, a water collecting part arranged in the barrel and a water outlet pipe arranged on the side wall of the barrel, the water collecting part comprises a bottom edge and a side wall vertically arranged at one end of the bottom edge, the bottom edge is in a ring shape and is hermetically connected to the middle part of the inner wall of the barrel, the upper part of the side wall is in a sawtooth shape and is lower than a flow guide ring, a first water collecting channel is formed by the outer wall of the flow guide ring, the side wall, the upper side of the bottom edge and the inner wall of the barrel, and the first water collecting channel is communicated with the water outlet pipe.
The invention relates to an induced crystallization chemical softening device, which is characterized in that as an optimal mode, a water collecting area comprises a cylinder and a water outlet pipe arranged on the side wall of the cylinder, an upper end enclosure is arranged at the upper part of the water collecting area, a circulating crystallization area and the upper end enclosure form a closed structure, a second water collecting channel is formed by the outer wall of a flow guide ring, the inner wall of the upper end enclosure and the inner wall of the cylinder, and the second water collecting channel is communicated with the water outlet pipe; the upper end enclosure comprises an exhaust pipe arranged in the center of the top and a seed crystal feeding manhole arranged on the side surface of the top.
The invention relates to an induced crystallization chemical softening device, which is characterized in that as a preferred mode, a check part comprises a pipe body, a base, a check plate, a telescopic part and a guide plate, wherein the base is hermetically connected to the bottom of the pipe body; the inner diameter of the top of the pipe body is big at the top and small at the bottom; a first round hole, a second round hole and a circular platform hole are sequentially formed in the middle of the base from bottom to top, the diameter of the first round hole is larger than that of the second round hole, the circular platform hole is large in upper portion and small in lower portion, and the diameter of the lower portion of the circular platform hole is the same as that of the second round hole; the check plate sequentially comprises a circular truncated cone base, a supporting block and a guide rod positioned in the center of the upper part of the supporting block from bottom to top, and the circular truncated cone base is matched with the circular truncated cone hole in size; the telescopic component is wound on the guide rod; the middle of the guide plate is provided with a hole matched with the guide rod, and the periphery of the guide plate is provided with a circular hole; the check plate extends out of the outer side of the guide plate through the central through hole of the guide plate, and the telescopic component is positioned on the lower side of the guide plate.
The water inlet component of the device has a certain inclination angle between the water outlet pipe and the water inlet channel, when water flow is obliquely and downwards flushed from the water outlet pipe, a rotating flow is formed in the inner cavity of the filtering unit cylinder, and a hydraulic stirring state is formed under the blocking of the scraper.
The driving motor of the device can drive the driving shaft to rotate clockwise or anticlockwise in a positive and negative rotation mode according to control.
When the driving motor drives the driving shaft to move clockwise, the upper scraper rotates clockwise, and when the driving motor drives the driving shaft to move anticlockwise, the upper scraper stops under the action of the overrunning clutch.
When the driving motor drives the driving shaft to move anticlockwise, the lower scraper rotates anticlockwise, and when the driving motor drives the driving shaft to move clockwise, the lower scraper stops under the action of the overrunning clutch.
The filtration exocoel of this device is equipped with detachable superstrong permanent bar magnet, and the bar magnet has stronger deironing function, can further get rid of the following fine particle thing of 100 um. The magnetic rods are uniformly arranged in the filtering outer cavity, so that water flow can be fully contacted with the magnetic rods in the filtering outer cavity.
The check part of the device has a check function and an anti-blocking function, so that water flow can only flow upwards, circulating sewage enters a circulating crystallization area from the check part after being filtered by a filtering hole of a filtering cylinder, and a check plate continuously moves upwards under the action of the water flow along with the continuous increase of the water flow, the axial length of an elastic telescopic part is continuously and automatically reduced, and the overflowing area is continuously increased; when rivers constantly reduce, the check board moves down under the elastic action of flexible part, and the axial length of flexible part constantly increases automatically, and the area of overflowing constantly reduces, therefore this structure can prevent that seed crystal and tiny crystal grain from blockking up inhalant canal to effectively prevent that seed crystal and tiny crystal grain in the circulation crystallization district from getting into filtering the exocoel.
The central hole of the non-return part guide plate has a guiding function on the linear motion of the non-return guide rod, and a plurality of round holes uniformly distributed in the guide plate are used as flow channels of water flow.
The inner wall of the water outlet of the non-return part is arranged to be a slope structure with a directional camber angle, so that the circular flow of water flow in the circular crystallization area is facilitated.
The W-shaped bottom flow guide part of the device is arranged at the bottom of the circulating crystallization area, and the W-shaped bottom is communicated with the crystalline particle discharge pipe. The design of the W-shaped bottom is beneficial to circulating sewage carrying the seed crystals and the crystallized particles to circulate in the circulating crystallization area.
The inner cylinder body of the circulating crystallization area of the device is of a straight cylinder structure. The bottom of the diversion ring arranged at the top of the circulating crystallization area inclines outwards, the top of the diversion ring is of a straight-tube structure, and the structural design is favorable for downward flow of water flow, so that effective guarantee is provided for circulating flow.
The water collecting channel of the water collecting area enables water flow to flow out evenly.
The circulating crystallization area of the device consists of an up-flow area, a down-flow area and a guide ring. The outlet of the non-return part enables water flow to flow upwards in a jet shape after entering the ascending flow area, the circulating crystal seeds and crystal particles from the ascending flow area enter the descending flow area under the action of the flow guide ring, the water flow is enabled to realize high-efficiency circulating flow in the circulating crystallization area under the multiple actions of the non-return part, the flow guide ring and the W-shaped bottom flow guide part, and the crystal seeds and the crystal particles can be effectively prevented from entering the water collection area through the design of the flow guide ring.
S001, the running state of the device:
when the device operates, circulating sewage enters the water inlet cavity through the water inlet pipeline under the driving of the lift pump, and meanwhile, the PAC medicament is added into the water inlet pipeline. Then the circulating sewage and PAC flow through the annular water inlet channel and obliquely flow downwards into the inner cavity of the filtering unit, and the SS is subjected to flocculation reaction aggregation in the inner cavity of the filtering unit and is effectively intercepted when passing through the filter screen. The circulation blow off water gets into behind the filter screen and filters the exocoel, filters the exocoel and is equipped with detachable superstrong permanent bar magnet, has stronger deironing function, can further get rid of circulation blow off water incoming water fine particle matter below 100 um. Then the circulating sewage is mixed with the selective calcium-removing medicament sprayed from the medicament outlet of the medicament distribution part. After mixing, the circulating sewage enters the circulating crystallization area through the non-return part.
In the circulating crystallization area, a certain amount of seed crystals (the grain size of the seed crystals is usually not more than 0.09 mm) are added in advance, and circulating sewage is subjected to induced crystallization heterogeneous nucleation chemical softening reaction in the circulating crystallization area. Under the flow guide effect of the flow guide ring and the flow guide part at the W-shaped bottom, the circulating sewage carries the seed crystals and the crystal particles to carry out circulating fluidization in the circulating crystallization area. The circulating sewage after induced crystallization softening enters a water collecting area and is finally discharged out of the device through a water outlet pipe.
The crystal seeds are continuously reduced in the circulating crystallization process and are accompanied with the continuous growth of crystal particles, so that calcium ions in the circulating sewage are continuously reduced, and the calcium ion content in the circulating sewage discharged from the water collecting area can meet the water inlet requirement of the subsequent membrane treatment process.
During the circulation fluidization of the crystallization particles, the crystallization particles with large particle size tend to be positioned in the bottom area of the circulation crystallization area. According to engineering experience, when the grain diameter of the crystal particles grows to 2-3 mm, the crystal particles can be discharged out of the device of the invention through the crystal particle discharge pipe periodically under the action of water pressure.
In the process, the driving motor is in a shutdown state, and a drain valve connected with a drain pipe of the device is in a closed state.
S002, the device is in a non-stop cleaning state:
the device adopts a brush type scraper to remove dirt and blockage on the filter screen.
Along with the increase of the working water quantity, the impurities filtered out by the filtering cylinder body are increased on the filter screen, and along with the accumulation of the impurities on the filter screen, the pressure difference between the inside and the outside of the filter screen is increased.
(1) When a certain pressure difference is achieved between the inside and the outside of the upper filtering unit, the upper sewage discharge valve connected with the upper filtering unit is opened, and the driving motor is started to drive the driving shaft to move clockwise.
When the driving motor drives the driving shaft to move clockwise, the upper scraping plate rotates clockwise under the action of the clockwise overrunning clutch to scrape dirt and blockage on the upper filtering cylinder, and the lower scraping plate stops under the action of the anticlockwise overrunning clutch.
When the inner cavity of the upper filtering unit is used for cleaning the filter screen, the inner cavity of the lower filtering unit is in a normal working state. At the moment, in the inner cavity of the upper filtering unit, the scraping and brushing effect of the upper scraper on the filter screen exists, the water flow pressure outside the upper filtering unit is greater than the water flow pressure inside the upper filtering unit, and therefore the reverse flushing effect from outside to inside exists, the dirt and the blockage in the filter hole are thoroughly cleaned, and the filter screen cleaning effect is more excellent.
(2) When a certain pressure difference is achieved between the inside and the outside of the lower filtering unit, the lower sewage discharge valve connected with the lower filtering unit is opened, and the driving motor is started to drive the driving shaft to move anticlockwise.
When the driving motor drives the driving shaft to move anticlockwise, the lower scraping plate rotates anticlockwise under the action of the anticlockwise overrunning clutch to scrape dirt and blockage on the lower filter cylinder, and the upper scraping plate stops under the action of the clockwise overrunning clutch.
When the inner cavity of the lower filter cylinder is used for cleaning the filter screen, the inner cavity of the upper filter cylinder is in a normal working state. At the moment, in the inner cavity of the lower filter cylinder, the scraping and brushing effect of the lower scraping plate on the filter screen exists, the water flow pressure of the outer cavity of the filter cylinder is greater than that of the inner cavity of the lower filter cylinder, so that the reverse flushing effect from outside to inside exists, the dirt and the blockage of the filter hole are thoroughly cleaned, and the filter screen cleaning effect is more excellent.
In the process, the induced crystallization chemical softening device is in a normal water inlet state, and the growth of the crystal particles in the circulating crystallization area continues. Therefore, continuous and efficient reaction for inducing crystallization chemical softening under the condition of high SS water inflow is realized.
Then, one run → the end of the purge cycle, and the system resumes normal operating conditions. When the pressure difference between the inside and the outside of the upper filtering unit and the pressure difference between the inside and the outside of the lower filtering unit reach set values, the cleaning is carried out at different times by utilizing program control.
In addition, in order to increase the circulation speed and the water inflow amount of the induced crystallization chemical softening device in a circulation crystallization area, an upper end enclosure is arranged at the top of the device, and the upper part of a guide ring is directly connected with the upper end enclosure; the water collecting area is not provided with a water collecting part, the top of the outer cylinder body of the device is connected with an outer sealing head, and the upper part of the outer cylinder body is provided with a water outlet; the top of the upper end enclosure is provided with an exhaust pipe and a seed crystal feeding manhole. In this case, the device can operate at a high flow rate under a high pressure state, and the structural form also belongs to the protection scope of the patent.
The invention has the following advantages:
(1) The water inlet component adopts an inclined downward water inlet structure, so that the inflow water flow forms a rotational flow in the inner cavity of the filtering cylinder body, and the water flow forms a stirring flow state under the coordination of the scraping plates. This structure facilitates flocculation and aggregation of suspended matter.
(2) The medicine distributing part consists of an annular medicine inlet channel and a medicine outlet pipe, and under the action of the medicine outlet pipe, the medicine distributing effect is more ideal, and the medicine in the water flow is more uniformly mixed.
(3) The non-return part is internally provided with a non-return function, so that water flow can only flow upwards, circulating sewage enters the circulating crystallization area from the non-return part, the flow area of the non-return part is continuously increased along with the continuous increase of the water flow, and when the water flow is continuously reduced, the flow area of the non-return part is continuously reduced, so that the structure can effectively prevent crystal seeds and fine crystal particles in the circulating crystallization area from entering the filtering outer cavity.
(4) The filter exocoel is equipped with detachable superstrong permanent bar magnet, has stronger deironing function, can further get rid of the circulation blow off water and come the following tiny particle thing of 100um in the water.
(5) The circulating crystallization area is formed by matching an inner cylinder body and an outer cylinder body. The inner cylinder body is of a straight cylinder structure. The bottom of the guide ring arranged at the top of the circulating crystallization area is outwards inclined, and the structural design forces the water flow from the up-flow area to flow downwards, thereby providing effective guarantee for circulating flow.
(6) The cavity bottom of the circulating crystallization area adopts a W-shaped bottom structure design, so that circulation of circulating sewage carrying seed crystals and crystallization particles is facilitated.
(7) The water collecting area is provided with a water collecting channel, so that water flow can uniformly flow out of the water collecting area.
(8) When the driving motor drives the driving shaft to move clockwise, the upper scraper rotates clockwise, and when the driving motor drives the driving shaft to move anticlockwise, the upper scraper stops under the action of the overrunning clutch.
When the driving motor drives the driving shaft to move anticlockwise, the lower scraper rotates anticlockwise, and when the driving motor drives the driving shaft to move clockwise, the lower scraper stops under the action of the overrunning clutch.
(9) When the inner cavity of the upper filtering unit is used for cleaning the filter screen, at the moment, the inner cavity of the lower filtering unit is in a normal working state. At the moment, in the inner cavity of the upper filtering unit, the scraping and brushing effect of the upper scraping plate on the filter screen exists, and the water flow pressure intensity of the filtering outer cavity is greater than that of the inner cavity of the upper filtering unit, so that the reverse flushing effect from the filtering outer cavity to the inner cavity of the upper filtering unit exists, and the dirt and blockage of the filtering holes are thoroughly cleaned.
When the inner cavity of the lower filtering unit is used for cleaning the filter screen, at the moment, the inner cavity of the upper filtering unit is in a normal working state. At the moment, in the inner cavity of the lower filtering unit, the scraping and brushing effect of the lower scraping plate on the filter screen exists, and the water flow pressure intensity of the filtering outer cavity is greater than that of the inner cavity of the lower filtering unit, so that the reverse flushing effect from the filtering outer cavity to the inner cavity of the lower filtering unit exists, and the dirt and blockage of the filter holes are thoroughly cleaned.
Therefore, the device with self back washing function has excellent washing effect.
Drawings
FIG. 1 is a front cross-sectional view of an induced crystallization chemical softening apparatus;
FIG. 2 is a three-dimensional front cross-sectional view of an induced crystallization chemical softening apparatus;
FIG. 3 is a schematic water flow diagram of an induced crystallization chemical softening apparatus;
FIG. 4 is a front cross-sectional view of a water collection device of an induced crystallization chemical softening device;
FIG. 5 is a three-dimensional front cross-sectional view of a first water-collecting channel of an induced crystallization chemical softening unit;
FIG. 6 is a front cross-sectional view of a flow directing member of an induced crystallization chemical softening apparatus;
FIG. 7 is a three-dimensional view of a flow directing feature of an induced crystallization chemical softening device;
FIG. 8 is a three-dimensional view of a deflector ring of an induced crystallization chemical softening apparatus;
FIG. 9 is a front cross-sectional view of a water stop component of an induced crystallization chemical softening apparatus;
FIG. 10 is a three-dimensional front sectional view of an induced crystallization chemical softening apparatus with a water stop member in an open state;
FIG. 11 is a three-dimensional front sectional view of a water stop member of an induced crystallization chemical softening apparatus in a closed state;
FIG. 12 is a diagram of a crystallization-inducing chemical softening apparatus water stop member from closed to open to the maximum extent;
FIG. 13 is a three-dimensional view of a dispensing feature of an induced crystallization chemical softening unit;
FIG. 14 is a three-dimensional view of a filter cartridge of an induced crystallization chemical softening apparatus;
FIG. 15 is a three-dimensional view of a water inlet component of an induced crystallization chemical softening apparatus;
FIG. 16 is a three-dimensional view of a scraper system of an induced crystallization chemical softening apparatus;
FIG. 17 is a three-dimensional front cross-sectional view of an embodiment 2 of an induced crystallization chemical softening apparatus;
FIG. 18 is a three-dimensional front cross-sectional view of an induced crystallization chemical softening unit of example 3.
Reference numerals are as follows:
1. a water collection area; 11. a barrel; 12. a water collecting part; 121. a bottom edge; 122. a side wall; 13. a water outlet pipe; 14. a first water collecting channel; 15. a second water collecting channel; 2. a circulating crystallization area; 21. an inner cylinder; 22. an outer cylinder; 23. an outer cylinder bottom; 24. a check member; 241. a pipe body; 2421. a first circular hole; 2422. a second circular hole; 2423. a circular truncated cone hole; 242. a base; 243. a check plate; 2431. a circular truncated cone base; 2432. a support block; 2433 a guide bar; 244. a telescopic member; 245. a guide plate; 25. a flow guide member; 26. a crystalline particle discharge pipe; 27. a flow guide ring; 28. an upflow channel; 29. a down flow channel; 3. a filtration zone; 31. a filtering outer cavity; 32. a lower filtration unit; 321. a lower filter cartridge; 322. a lower water inlet component; 323. a lower mud discharge pipe; 33. an upper filter unit; 331. an upper filter cartridge; 332. an upper water inlet part; 3321. an upper water inlet pipe; 3322. an upper water inlet channel; 3323. an upper water outlet pipe; 333. an upper dredge pipe; 34. a medicine dispensing component; 341. a medicine inlet pipe; 342. an annular medicine inlet channel; 343. a medicine outlet pipe; 35. a magnetic bar; 4. a mud scraping system; 41. a drive motor; 42. a drive shaft; 43. an upper scraper plate; 44. a lower scraper; 45. a clockwise overrunning clutch; 46. a counterclockwise overrunning clutch; 5. a support leg; 6. an upper end enclosure; 61. an exhaust pipe; 62. and (4) adding seed crystals into the manhole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
As shown in figure 1, the chemical softening device for induced crystallization comprises a water collecting area 1, a circulating crystallization area 2 and a filtering area 3 which are arranged from top to bottom, a mud scraping system 4 connected with the inside of the filtering area 3 and supporting legs 5 arranged on the outer side of the bottom of the filtering area 3, wherein the water collecting area 1, the circulating crystallization area 2 and the filtering area 3 form an integrated structure.
As shown in fig. 2-5, the water collecting region 1 includes a barrel 11, a water collecting component 12 disposed inside the barrel 11 and a water outlet pipe 13 disposed on a side wall of the barrel 11, the water collecting component 12 includes a bottom edge 121 and a side wall 122 vertically disposed at one end of the bottom edge, the bottom edge 121 is in a circular ring shape and is hermetically connected to a middle portion of an inner wall of the barrel 11, an upper portion of the side wall 122 is in a zigzag shape and is lower than the flow guide ring 27, a first water collecting channel 14 is formed by an upper side of the flow guide ring 27, an outer wall of the flow guide ring 122, the side wall 122, an upper side of the bottom edge 121 and the inner wall of the barrel 11, and the first water collecting channel 14 is communicated with the water outlet pipe 13.
As shown in fig. 6-12, the circulating crystallization zone 2 comprises an inner cylinder 21, an outer cylinder 22 arranged outside the inner cylinder 21, an outer cylinder bottom 23 arranged at the bottom of the outer cylinder 22 and a check component 24 arranged at the center of the outer cylinder bottom 23, wherein the inlet of the check component 24 is arranged at the top of the filtration zone 3, the outlet of the check component 24 is arranged at the bottom of the circulating crystallization zone 2, the circulating crystallization zone 2 is communicated with the water collection zone 1, and the circulating crystallization zone 2 is communicated with the filtration zone 3 through the check component 24;
the circulating crystallization area 2 also comprises a flow guide part 25 arranged at the center of the bottom of the outer cylinder bottom 23 and a crystal particle discharge pipe 26 arranged at the outer side of the bottom of the flow guide part 25, the section of the flow guide part 25 is smooth W-shaped, and a through hole for the check part 24 to pass through is reserved at the center;
the inner cylinder 21 is fixed in the outer cylinder 22 in a hanging manner and has no cylinder bottom, a flow guide ring 27 with a structure that the bottom is large at the bottom and the top is small at the top is arranged between the upper part of the inner cylinder 21 and the outer cylinder 22, the upper part of the flow guide ring 27 is of a cylindrical structure and extends upwards to the top of the water collecting area 1, an upflow channel 28 is formed in the inner cylinder 21, and a downflow channel 29 is formed by the flow guide ring 27, the outer wall of the inner cylinder 21, the inner wall of the outer cylinder 22 and the flow guide part 25;
the check member 24 includes a tube 241, a base 242 sealingly coupled to the bottom of the tube 241, a check plate 243 disposed above the base 242, a telescopic member 244 wound around the check plate 243, and a guide plate 245 disposed above the check plate 243 and sealingly coupled in the tube 241; the inner diameter of the top of the tube body 241 is large at the top and small at the bottom; a first round hole 2421, a second round hole 2422 and a circular truncated cone hole 2423 are formed in the middle of the base 242 from bottom to top, the diameter of the first round hole 2421 is larger than that of the second round hole 2422, the upper portion of the circular truncated cone hole 2423 is large, the lower portion of the circular truncated cone hole 2423 is small, and the diameter of the lower portion of the circular truncated cone hole is the same as that of the second round hole 2422; the check plate 243 sequentially comprises a circular table base 2431, a supporting block 2432 and a guide rod 2433 positioned in the center of the upper part of the supporting block 2432 from bottom to top, and the circular table base 2431 is matched with the circular table hole 2423 in size; the telescopic member 244 is wound around the guide bar 2433; the middle of the guide plate 245 is provided with a hole matched with the guide rod 2433, and the periphery of the guide plate is provided with a circular hole; the check plate 243 is protruded to the outside of the guide plate 245 through a central through hole of the guide plate 245, and the expansion member 244 is positioned at the lower side of the guide plate 245.
As shown in fig. 13-15, the filtering area 3 includes a filtering outer cavity 31, a lower filtering unit 32, an upper filtering unit 33 and a medicine distribution component 34 which are sequentially arranged inside the filtering outer cavity 31 from bottom to top, the lower filtering unit 32 is hermetically connected with the bottom of the filtering outer cavity 31 and has a passage on the side part, the upper filtering unit 33 is vertically connected above the lower filtering unit 32 and has a passage on the upper part and the side part of the filtering outer cavity 31, and the upper filtering unit 33 is not communicated with the lower filtering unit 32;
the lower filter unit 32 includes a lower filter cartridge 321, a lower water inlet member 322 fixed to the inner top of the lower filter cartridge 321, and a lower sludge discharge pipe 323 communicating with the bottom of the lower filter cartridge 321; the upper filtering unit 33 includes an upper filtering cylinder 331, an upper water inlet part 332 fixed at the inner top of the upper filtering cylinder 331 and an upper sludge discharge pipe 333 communicated with the bottom of the upper filtering cylinder 331; the side surfaces of the upper filter cylinder 331 and the lower filter cylinder 321 are provided with a plurality of filter holes which are uniformly distributed, the upper filter cylinder 331 and the lower filter cylinder 321 are communicated with the filter outer cavity 31 through the filter holes, and the filter holes are circular holes, square holes or rectangular holes;
the lower water inlet component 322 comprises a lower water inlet pipe, an annular lower water inlet channel connected with the tail end of the lower water inlet pipe and a plurality of obliquely downward lower water outlet pipes which are arranged at the bottom of the lower water inlet channel and are uniformly arranged; the upper water inlet part 332 comprises an upper water inlet pipe 3321, an annular upper water inlet channel 3322 connected to the tail end of the upper water inlet pipe 3321, and a plurality of obliquely downward upper water outlet pipes 3323 arranged at the bottom of the upper water inlet channel 3322 and uniformly arranged.
The medicine distributing part 34 comprises a medicine inlet tube 341, an annular medicine inlet channel 342 communicated with the medicine inlet tube 341 and a plurality of medicine outlet tubes 343 uniformly extending out of the periphery of the annular medicine inlet channel 342.
As shown in fig. 16, the sludge scraping system 4 includes a driving motor 41 disposed at the center of the outside of the bottom of the filtering section 3, a driving shaft 42 connected to the driving motor 41, an upper scraper 43 connected to the upper portion of the driving shaft 42 and located inside the upper filtering unit 33, and a lower scraper 44 connected to the lower portion of the driving shaft 42 and located inside the lower filtering unit 32;
the mud scraping system 4 further comprises a clockwise overrunning clutch 45 connecting the driving shaft 42 and the upper scraping plate 43 and a counterclockwise overrunning clutch 46 connecting the driving shaft 42 and the lower scraping plate 44, wherein the upper scraping plate 43 and the lower scraping plate 44 are both formed by hollow box-shaped structures.
Example 2
As shown in fig. 17, on the basis of embodiment 1, a plurality of magnetic rods 35 are vertically and uniformly arranged in the passage between the outer filtering cavity 31 and the side parts of the lower filtering unit 32 and the upper filtering unit 33.
Example 3
As shown in fig. 18, an induced crystallization chemical softening device comprises a water collecting region 1, a circulating crystallization region 2, a filtering region 3, a mud scraping system 4 connected with the inside of the filtering region 3, support legs 5 arranged on the outer side of the bottom of the filtering region 3 and an upper end enclosure 6 arranged on the upper portion of the water collecting region 1, wherein the water collecting region 1, the circulating crystallization region 2 and the filtering region 3 form an integrated structure, and the water collecting region 1, the circulating crystallization region 2 and the upper end enclosure 6 form a closed structure.
The water collecting area 1 comprises a cylinder body 11 and a water outlet pipe 13 arranged on the side wall of the cylinder body 11, a second water collecting channel 15 is formed by the outer wall of the flow guide ring 27, the inner wall of the upper sealing head 6 and the inner wall of the cylinder body 11, and the second water collecting channel 15 is communicated with the water outlet pipe 13;
the arrangement of the circulating crystallization zone 2, the filtration zone 3, the sludge scraping system 4 and the legs 5 is the same as in example 2.
The upper sealing head 6 comprises an exhaust pipe 61 arranged in the center of the top and a seed crystal feeding manhole 62 arranged on the side surface of the top.
When this embodiment 1, 2, 3 ran, circulation blowdown water got into the intake antrum through the inlet channel under the drive of elevator pump, and meanwhile, PAC medicament added inlet channel, and the research discovers that PAC's throwing can effectively abolish the stability ability of antisludging agent in the circulation blowdown, realizes effectively breaking steadily. Then the circulating sewage and PAC are flushed obliquely downward from the upper outlet pipe 3323 and the lower outlet pipe through the upper inlet channel 3322 and the lower inlet channel, respectively, to form a rotating flow in the inner cavities of the cylinders of the upper filtering unit 33 and the lower filtering unit 32, and at the same time, a hydraulic stirring state is formed under the respective blocking of the upper scraper 43 and the lower scraper 44.
In the upper and lower filtering units 33 and 32, SS of the circulating sewage is collected by flocculation and is effectively intercepted while passing through the upper and lower filtering cartridges 331 and 321, respectively. The circulating sewage then enters the filtering outer cavity 31 to be mixed with the selective calcium-removing medicament sprayed from the medicament outlet pipe 343 of the medicament distribution part 34. After mixing, the circulating blowdown water enters the circulating crystallization zone 2 through the check 24.
The check part 24 has a check function and an anti-blocking function inside, so that water flow can only flow upwards, the check plate 243 continuously moves upwards under the action of the water flow along with the continuous increase of the circulating sewage flow, the axial length of the elastic telescopic part 244 is continuously and automatically reduced, and the flow area is continuously increased; when the water flow is continuously reduced, the check plate 243 moves downwards under the elastic action of the telescopic component 244, the axial length of the telescopic component is continuously and automatically increased, and the flow area is continuously reduced, so that the blocking of the water inlet channel by the seed crystals and the fine crystal particles can be prevented, and the seed crystals and the fine crystal particles in the circulating crystallization area 2 can be effectively prevented from entering the filtering outer cavity 31.
The central hole of the guide plate 245 of the check member 24 has a guiding function for the linear motion of the guide rod 2433 of the check plate 243, and a plurality of circular holes uniformly distributed in the guide plate 245 are used as a flow passage of water flow.
The inner wall of the water outlet of the check part 24 is provided with a slope structure with a directional camber angle, which is more beneficial to the circular flow of water flow in the circular crystallization area 2.
A certain amount of seed crystals (the grain size of the seed crystals is usually not more than 0.09 mm) are added in advance in the circulating crystallization area 2, and circulating sewage carries out induced crystallization heterogeneous nucleation chemical softening reaction in the circulating crystallization area 2: the selective calcium removing agent added through the medicine distribution part 34 reacts with calcium ions in the circulating sewage, and is precipitated and grown on the surface of the seed crystal in a crystal form to form a granular object, namely crystal particles, the center of which is the seed crystal and the outer layer of which is wrapped with high-purity crystal.
The design of the W-shaped bottom is beneficial to circulating sewage carrying the seed crystals and the crystallized particles to circulate in the circulating crystallization area.
The inner cylinder 21 of the circulating crystallization area 2 is of a straight cylinder structure. The bottom of the diversion ring 27 arranged at the top of the circulating crystallization area 2 inclines outwards, and the top of the diversion ring is of a straight-tube structure, so that the downward flow of water flow is facilitated, and the effective guarantee is provided for the circulating flow.
The circulating crystallization area 2 consists of an upflow channel 28, a downflow channel 29 and a guide ring 27. The outlet of the check part 24 makes the water flow enter the rising channel 28 and then flow upwards in a jet shape, under the action of the guide ring 27, the seed crystals and the crystal particles from the circulation of the rising channel 28 enter the falling channel 29, under the multiple actions of the check part 24, the guide ring 27 and the W-shaped bottom guide part 25, the water flow realizes high-efficiency circulation flow in the circulation crystallization area 2, and the guide ring 27 is designed to effectively prevent the seed crystals and the crystal particles from entering the water collection area.
Under the flow guiding action of the flow guiding ring 27 and the flow guiding part 25 at the W-shaped bottom, the circulating sewage carries the seed crystals and the crystal particles to carry out circulating fluidization in the circulating crystallization area 2. The circulating sewage after induced crystallization softening enters the water collecting area 1 and is finally discharged out of the device through a water outlet pipe.
The crystal seeds are continuously reduced in the circulating crystallization process and are accompanied with the continuous growth of crystal particles, so that calcium ions in the circulating sewage are continuously reduced, and the calcium ion content in the circulating sewage discharged from the water collecting area 1 can meet the water inlet requirement of the subsequent membrane treatment process.
During the circulation fluidization of the crystallization particles, the crystallization particles with large particle size tend to be positioned in the bottom area of the circulation crystallization area. According to engineering experience, when the grain diameter of the crystal particles grows to 2-3 mm, the crystal particles can be discharged out of the device of the invention through the crystal particle discharge pipe periodically under the action of water pressure.
In the process, the driving motor 41 is in the off state, and the drain valve connected with the drain pipe of the device is in the closed state.
The filtration exocoel 31 of this embodiment 2 is equipped with detachable superstrong permanent bar magnet 35, and bar magnet 35 has stronger deironing function, can further get rid of fine particle thing below the 100 um. The magnetic rods 35 are uniformly arranged in the outer filtering cavity 31 so that the water flow can be fully contacted with the magnetic rods 35 in the outer filtering cavity 31.
The upper end enclosure 6 and the water collecting area 1 of the embodiment 3 are sealed, so that the circulation speed and the inflow water amount of the induced crystallization chemical softening device in the circulating crystallization area 2 can be increased, and at the moment, the device can operate in a high flow rate under a high pressure state, and the structural form also belongs to the protection range of the patent.
The cleaning state of the present examples 1, 2, and 3 is not stopped:
in the examples 1, 2 and 3, the cleaning of the filter screen from the fouling was carried out by using a brush scraper.
As the amount of the working water increases, the amount of the impurities filtered by the upper filter cartridge 331 and the lower filter cartridge 321 increases on the filter screen, and as the impurities accumulate on the filter screen, the pressure difference between the inside and the outside of the filter screen increases.
(1) When a certain pressure difference between the inside and the outside of the upper filter unit 33 is reached, the upper drain valve connected to the upper filter unit 33 is opened, and the driving motor 41 is started to drive the driving shaft 42 to move clockwise.
When the driving motor 41 drives the driving shaft 42 to move clockwise, the upper scraping plate 43 rotates clockwise under the action of the clockwise overrunning clutch 45, dirt and blockage are scraped on the upper filter cylinder 331, and the lower scraping plate 44 stops under the action of the anticlockwise overrunning clutch 46.
When the inner cavity of the upper filter unit 33 is used for cleaning the filter screen, the inner cavity of the lower filter unit 32 is in a normal working state. At this time, in the inner cavity of the upper filter unit 33, not only the scraping function of the upper scraper 43 to the filter screen exists, but also the water flow pressure outside the upper filter unit 33 is greater than the water flow pressure inside the upper filter unit 33, so that the reverse flushing effect from outside to inside exists, and the dirty and blocked objects in the filter holes are thoroughly cleaned, so that the filter screen cleaning effect is more excellent.
(2) When a certain pressure difference is achieved between the inside and the outside of the lower filter unit 32, the lower drain valve connected to the lower filter unit 32 is opened, and the driving motor 41 is started to drive the driving shaft 42 to move counterclockwise.
When the driving motor 41 drives the driving shaft 42 to move counterclockwise, the lower scraping plate 44 rotates counterclockwise under the action of the counterclockwise overrunning clutch 46, dirt and blockage are scraped from the lower filter cylinder 321, and the upper scraping plate 43 stops under the action of the clockwise overrunning clutch 45.
When the inner cavity of the lower filter unit 32 is used for cleaning the filter screen, the inner cavity of the upper filter unit 33 is in a normal working state. At this time, in the inner cavity of the lower filtering unit 32, not only the scraping and brushing effect of the lower scraping plate 44 on the filter screen exists, but also the water flow pressure of the outer cavity of the lower filtering unit 32 is greater than the water flow pressure in the inner cavity of the lower filtering unit 32, so that the reverse flushing effect from outside to inside exists, the dirt and the blockage in the filter hole are thoroughly cleaned, and the filter screen cleaning effect is more excellent.
In the process, the device is in a normal water inlet state, and the growth of the crystal particles in the circulating crystallization area 2 is continued. Therefore, continuous and efficient reaction for inducing crystallization chemical softening under the condition of high SS water inflow is realized.
Then, one run → the purge cycle ends and the system resumes normal operating conditions. When the pressure difference between the inside and the outside of the upper filter unit 33 and the pressure difference between the inside and the outside of the lower filter unit 32 reach the set values, the cleaning is performed at different times by program control.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. An induced crystallization chemical softening apparatus, characterized by: comprises a water collecting area (1), a circulating crystallization area (2), a filtering area (3), a mud scraping system (4) connected with the inside of the filtering area (3) and supporting legs (5) arranged at the outer side of the bottom of the filtering area (3) from top to bottom; the water collecting area (1), the circulating crystallization area (2) and the filtering area (3) form an integrated structure;
the circulating crystallization area (2) comprises an inner cylinder body (21), an outer cylinder body (22) arranged on the outer side of the inner cylinder body (21), an outer cylinder bottom (23) arranged at the bottom of the outer cylinder body (22), a non-return part (24) arranged at the center of the outer cylinder bottom (23), a flow guide part (25) arranged at the center of the bottom of the outer cylinder bottom (23) and a crystal particle discharge pipe (26) arranged on the outer side of the bottom of the flow guide part (25); the inlet of the check component (24) is arranged at the top of the filtering zone (3), the outlet of the check component (24) is arranged at the bottom of the circulating crystallization zone (2), the cross section of the flow guide component (25) is smooth W-shaped, and a through hole for the check component (24) to pass through is reserved in the center of the flow guide component; the circulating crystallization area (2) is communicated with the water collecting area (1), and the circulating crystallization area (2) is communicated with the filtering area (3) through the non-return part (24);
the check part (24) comprises a pipe body (241), a base (242) which is connected to the bottom of the pipe body (241) in a sealing mode, a check plate (243) which is arranged above the base (242), a telescopic part (244) which is wound on the check plate (243) and a guide plate (245) which is arranged above the check plate (243) and connected into the pipe body (241) in a sealing mode;
the filtering area (3) comprises a filtering outer cavity (31), and a lower filtering unit (32), an upper filtering unit (33) and a medicine distribution component (34) which are sequentially arranged in the filtering outer cavity (31) from bottom to top, wherein the lower filtering unit (32) is hermetically connected with the bottom of the filtering outer cavity (31), a channel is reserved on the side part of the lower filtering unit, the upper filtering unit (33) is vertically connected above the lower filtering unit (32), channels are reserved on the upper part and the side part of the filtering outer cavity (31), and the upper filtering unit (33) is not communicated with the lower filtering unit (32);
the mud scraping system (4) comprises a driving motor (41) arranged at the center of the outer side of the bottom of the filtering area (3), a driving shaft (42) connected with the driving motor (41), an upper scraper (43) connected with the upper portion of the driving shaft (42) and positioned in the upper filtering unit (33), a lower scraper (44) connected with the lower portion of the driving shaft (42) and positioned in the lower filtering unit (32), a clockwise overrunning clutch (45) connected with the upper scraper (43) and the driving shaft (42) and a counterclockwise overrunning clutch (46) connected with the lower scraper (44), wherein the upper scraper (43) and the lower scraper (44) are both formed by hollow box-shaped structures.
2. An induced crystallization chemical softening apparatus as claimed in claim 1, wherein: the upper filtering unit (33) comprises an upper filtering cylinder (331), an upper water inlet component (332) fixed at the inner top of the upper filtering cylinder (331) and an upper mud discharging pipe (333) communicated with the bottom of the upper filtering cylinder (331); the lower filter unit (32) comprises a lower filter cylinder (321), a lower water inlet component (322) fixed at the inner top of the lower filter cylinder (321) and a lower mud discharge pipe (323) communicated with the bottom of the lower filter cylinder (321); the side surfaces of the upper filter cylinder (331) and the lower filter cylinder (321) are provided with a plurality of filter holes which are uniformly distributed, and the upper filter cylinder (331) and the lower filter cylinder (321) are communicated with the outer filtering cavity (31) through the filter holes;
the water inlet component (332) comprises a water inlet pipe (3321), an annular water inlet channel (3322) connected to the tail end of the water inlet pipe (3321) and a plurality of downward and inclined water outlet pipes (3323) which are uniformly arranged and arranged at the bottom of the water inlet channel (3322); lower water inlet unit (322) are including lower inlet tube, connect and are in down inlet channel and the setting are in under the terminal annular of inlet tube a plurality of align to grid's of slant bottom inlet channel lower outlet pipe down.
3. An induced crystallization chemical softening apparatus as claimed in claim 2, wherein: the filtering holes are round holes, square holes or rectangular holes.
4. An induced crystallization chemical softening apparatus as claimed in claim 1, wherein: the medicine distribution component (34) comprises a medicine inlet pipe (341), an annular medicine inlet channel (342) communicated with the medicine inlet pipe (341) and a plurality of medicine outlet pipes (343) which uniformly extend out of the periphery of the annular medicine inlet channel (342).
5. An induced crystallization chemical softening apparatus as claimed in claim 1, wherein: a plurality of magnetic rods (35) are vertically and uniformly arranged in the channels at the side parts of the filtering outer cavity (31), the lower filtering unit (32) and the upper filtering unit (33).
6. An induced crystallization chemical softening apparatus as claimed in claim 1, wherein: interior barrel (21) unsettled fixing outside barrel (22) inside and do not have the bobbin base, interior barrel (21) upper portion with be provided with water conservancy diversion circle (27) of big-end-up structure down in the bottom between the barrel (22) outside, water conservancy diversion circle (27) upper portion is the tubular construction and upwards extends to catchment area (1) top, inside upflow passageway (28) that forms of interior barrel (21), water conservancy diversion circle (27) interior barrel (21) outer wall outside barrel (22) inner wall with water conservancy diversion part (25) form and fall and flow passageway (29).
7. An induced crystallization chemical softening apparatus as claimed in claim 6, wherein: water collection area (1) includes barrel (11), sets up barrel (11) inside water collection part (12) and setting are in outlet pipe (13) on barrel (11) lateral wall, water collection part (12) are in along (121) and perpendicular setting at the end along lateral wall (122) of one end including end, end along (121) for annular shape and sealing connection at barrel (11) inner wall middle part, the upper portion of lateral wall (122) is sawtooth shape and is less than water conservancy diversion circle (27), water conservancy diversion circle (27) outer wall lateral wall (122) end along (121) upside with barrel (11) inner wall forms first water collection channel (14), first water collection channel (14) with outlet pipe (13) intercommunication.
8. An induced crystallization chemical softening apparatus as claimed in claim 6, wherein: the water collecting area (1) comprises a cylinder body (11) and a water outlet pipe (13) arranged on the side wall of the cylinder body (11), an upper end enclosure (6) is arranged at the upper part of the water collecting area (1), the circulating crystallization area (2) and the upper end enclosure (6) form a closed structure, a second water collecting channel (15) is formed by the outer wall of the flow guide ring (27), the inner wall of the upper end enclosure (6) and the inner wall of the cylinder body (11), and the second water collecting channel (15) is communicated with the water outlet pipe (13); the upper sealing head (6) comprises an exhaust pipe (61) arranged in the center of the top and a seed crystal feeding manhole (62) arranged on the side surface of the top.
9. An induced crystallization chemical softening apparatus as claimed in claim 1, wherein: the inner diameter of the top of the pipe body (241) is large at the top and small at the bottom; a first round hole (2421), a second round hole (2422) and a circular truncated cone hole (2423) are sequentially formed in the middle of the base (242) from bottom to top, the diameter of the first round hole (2421) is larger than that of the second round hole (2422), the upper portion of the circular truncated cone hole (2423) is large, the lower portion of the circular truncated cone hole is small, and the diameter of the lower portion of the circular truncated cone hole is the same as that of the second round hole (2422); the check plate (243) sequentially comprises a circular table base (2431), a supporting block (2432) and a guide rod (2433) positioned in the center of the upper part of the supporting block (2432) from bottom to top, and the circular table base (2431) is matched with the circular table hole (2423) in size; the telescopic member (244) is wound on the guide bar (2433); the middle of the guide plate (245) is provided with a hole matched with the guide rod (2433), and the periphery of the guide plate is provided with a circular hole; the check plate (243) extends out of the guide plate (245) through a central through hole of the guide plate (245), and the telescopic member (244) is positioned at the lower side of the guide plate (245).
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