CN110575687B - Negative pressure water treatment device and filtering method and back flushing method thereof - Google Patents
Negative pressure water treatment device and filtering method and back flushing method thereof Download PDFInfo
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- CN110575687B CN110575687B CN201910332427.4A CN201910332427A CN110575687B CN 110575687 B CN110575687 B CN 110575687B CN 201910332427 A CN201910332427 A CN 201910332427A CN 110575687 B CN110575687 B CN 110575687B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 213
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000001914 filtration Methods 0.000 title claims abstract description 27
- 238000011010 flushing procedure Methods 0.000 title claims description 11
- 238000000746 purification Methods 0.000 claims abstract description 29
- 238000011001 backwashing Methods 0.000 claims abstract description 24
- 239000008213 purified water Substances 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 235000019362 perlite Nutrition 0.000 claims description 3
- 239000010451 perlite Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 2
- 238000012546 transfer Methods 0.000 claims description 2
- 238000004064 recycling Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000009182 swimming Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012824 chemical production Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 210000002310 elbow joint Anatomy 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000011268 retreatment Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/04—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls
- B01D24/06—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls the pervious walls comprising a series of louvres or slots
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/04—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls
- B01D24/08—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being clamped between pervious fixed walls the filtering material being supported by at least two pervious coaxial walls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4631—Counter-current flushing, e.g. by air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4668—Regenerating the filtering material in the filter by moving the filtering element
- B01D24/4689—Displacement of the filtering material to a compartment of the filtering device for regeneration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2101/00—Types of filters having loose filtering material
- B01D2101/02—Carbon filters
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to a negative pressure water treatment device, a filtering method and a back washing method thereof, and in order to realize the purpose, the invention provides the negative pressure water treatment device which comprises a water collector, a hair collector, an overflow groove, a water treatment tank, a water purification collector and the like, and also comprises a water purification collecting tank and a plurality of filter plates arranged in the water treatment tank.
Description
Technical Field
The invention relates to a water treatment device structure and a related method thereof, in particular to a negative pressure water treatment device and a filtering method and a back flushing method thereof.
Background
Utilization of water resources may generally include utilization by post-treatment and recycling. And water resources also need to be treated to a certain extent by water treatment equipment before being recycled. Patent document CN102574031B discloses a high-speed filtering device with porous media and a backwashing method thereof, in which the filtering media are laid on a wire mesh of a device in advance, which can also achieve a good filtering effect, however, the arrangement of the filtering media is not reasonable enough, the filtering device with such a structure needs to be manually laid in the device, and when the filtering media are removed, because the requirement of laying the filtering media and the radius of the device container are too large, the filtering media are difficult to be removed together by backwashing, and need to be manually cleaned by entering the device, the cleaning method has a large damage to the filtering media, the possibility of recycling is small, the regeneration needs to be performed in another device, and the development and recycling of the filtering media are influenced and limited.
Disclosure of Invention
One of the main objects of the present invention is to provide a negative pressure water treatment apparatus, a filtering method thereof and a backwashing method thereof, which are capable of facilitating addition, replacement and removal of a filtering medium.
In order to achieve the above object, there is provided a negative pressure water treatment apparatus, including a water collector, a hair collector, an overflow tank, a water treatment tank and a water purification collector, the overflow tank and the water treatment tank realize fluid transfer by overflow, further comprising:
a water purification collecting tank arranged below the water treatment tank, the interior of the tank body is sealed by the tank body and the bottom of the water treatment tank to form a space isolated from the outside, a plurality of mounting through holes for mounting filter plates are arranged at the bottom of the water treatment tank, the mounting through holes simultaneously form a channel for communicating the water treatment tank and the water purification collecting tank, and
a plurality of filter plates arranged in the water treatment tank, wherein each filter plate comprises a filter frame and filter screen plates arranged at two sides of the filter frame, the filter screen plates at two sides and the filter frame in the middle form a filter space, the filter frame is of a hollow structure, the bottom of the filter frame is provided with an insertion pipe orifice matched with a mounting through hole at the bottom of the water treatment tank, the insertion pipe orifice is inserted into the mounting through hole to hermetically communicate the hollow structure of the filter frame and a purified water collecting tank, one side of the filter space on the filter frame is provided with a plurality of water inlet holes, the water inlet holes are used for communicating the filter space and the hollow structure in the filter frame, and the aperture of the meshes on each filter screen plate is smaller than the particle,
wherein,
the outlet of the water collector is communicated with the inlet of the hair collector through a second pipeline, a first pipeline is connected beside the middle part of the second pipeline, a first valve is arranged on the first pipeline, a second valve is arranged on the second pipeline between the connection point of the first pipeline and the hair collector,
the outlet of the hair collector is communicated with the water inlet of the overflow groove through a third pipeline, a third valve is arranged on the third pipeline,
two water outlets for back flushing on the overflow trough are respectively connected with a fourth pipeline and a sixth pipeline, the fourth pipeline and the sixth pipeline are used for discharging back flushing water, a fourth valve and a sixth valve are respectively and correspondingly arranged on the fourth pipeline and the sixth pipeline,
a water outlet on the side surface of the water purification collecting tank is communicated with an inlet of the pump through an eighth pipeline, a seventh pipeline is connected beside the middle part of the eighth pipeline, a seventh valve is arranged on the seventh pipeline, an eighth valve is arranged between the connecting point of the seventh pipeline and the water purification collecting tank on the eighth pipeline,
the outlet of the pump is connected with a ninth pipeline of an inlet channel of the water purification collector, a fifth pipeline is connected beside the middle part of the ninth pipeline, the other end of the fifth pipeline is communicated with a water inlet and a water outlet at the bottom of the water purification collecting tank, a tenth pipeline is connected beside the fifth pipeline, a ninth valve is arranged on the ninth pipeline between the fifth pipeline connecting point and the water purification collector, a fifth valve is arranged on the fifth pipeline between the tenth pipeline connecting point and the ninth pipeline connecting point, and a tenth valve is arranged on the tenth pipeline,
and a water quality detection point is also arranged on the ninth pipeline and used for detecting the water quality by the water quality detection device.
The device also has the following optimized structure:
the filter screen plate comprises a filter screen and a filter screen support, and the filter screen is fixed on the filter screen support.
The filter screen support is preferably formed by X-shaped rod pieces, or formed by vertically arranging a plurality of transverse rod pieces, or formed by horizontally arranging a plurality of vertical rod pieces.
The filter medium comprises activated carbon or perlite.
The invention also relates to a filtering method of the negative pressure water treatment device, which comprises the following steps:
at the initial stage of the water treatment process, the fourth valve, the sixth valve, the seventh valve and the ninth valve are closed, the first valve, the second valve, the third valve, the eighth valve, the fifth valve and the tenth valve are opened, the pump is opened, a filter medium is added from the first pipeline, water flows from the water treatment device through the second pipeline, the hair collector, the third pipeline, the overflow trough, the water treatment tank, the filter plate and the purified water collecting trough, when the liquid level of the purified water collecting trough is low, the filtered water which does not reach the standard is directly discharged from the bottom of the purified water collecting trough to the fifth pipeline and then to the tenth pipeline, and as the liquid level rises, the filtered water is discharged through the eighth pipeline, the pump, the ninth pipeline, the fifth pipeline and the tenth pipeline,
the filter medium is adsorbed on the outer side of the filter screen plate in the filter plate due to the suction effect of the pump to form a stable filter layer, after the filter medium is added, the first valve is closed, the fifth valve and the tenth valve are closed after the water quality is detected to reach the standard by the detection point on the ninth pipeline, the ninth valve is opened, and the filtered water in the purified water collecting tank is sent to the purified water collector through the eighth pipeline, the pump and the ninth pipeline for storage.
The invention also relates to a backwashing method of the negative pressure water treatment device, which is characterized in that a first valve, a second valve, a third valve, an eighth valve, a ninth valve and a tenth valve are closed, a fourth valve, a fifth valve, a sixth valve and a seventh valve are opened, backwashing water flows in from the seventh pipeline and sequentially flows through the fifth pipeline, a water purification collecting tank and a filter plate under the action of a pump, backwashing on a filter screen plate in the filter plate is realized, the backwashing water is accumulated in a water treatment tank until reversely overflows to an overflow tank, a filter medium also enters the overflow tank along with the backwashing water, and then is discharged through the fourth pipeline and the sixth pipeline respectively.
Compared with the prior art, the filter medium does not need to be laid manually, the filter medium is automatically adsorbed on the outer side surface of the filter screen plate in the filter plate at the initial stage of filtration through the pressure difference between the water in the water treatment tank and the emptied purified water collecting tank and the suction action of the pump, the filter medium is kept on the filter screen plate through the suction action of the pump, when the filter medium needs to be replaced, the backwashing pipeline can drive the filter medium to be desorbed, and the filter medium can be well recovered, regenerated and reused.
Drawings
FIG. 1 is a schematic view showing a structure of a water treatment apparatus.
FIG. 2 is a flow chart of a process of the water treatment apparatus of FIG. 1 in a water treatment early stage.
FIG. 3 is a process flow diagram of water treatment in the water treatment plant of FIG. 1.
FIG. 4 is a flow diagram of a backwash process for the water treatment plant of FIG. 1.
FIG. 5 is a schematic view of a filter plate construction.
FIG. 6 is a schematic view of a second configuration of the filter plate.
FIG. 7 is a third schematic view of a filter plate.
Detailed Description
For purposes of the following detailed description, it is to be understood that the invention may assume various alternative variations and step sequences, except where expressly specified to the contrary. Moreover, other than in any operating examples, or where otherwise indicated, all numbers expressing, for example, quantities of ingredients used in the specification and claims are to be understood as being modified in all instances by the term "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the following specification and attached claims are approximations that may vary depending upon the desired properties to be obtained by the present invention. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques.
Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
The term "apparatus" as used herein refers to a chemical production apparatus for carrying out one or more or all of the steps of a process flow, which generally comprises chemical equipment, chemical machinery, and other components such as chemical instruments, chemical pipelines, and valves.
The term "negative pressure" in the specification means that a relative negative pressure is generated by the suction action of the water pump 6 on the purified water passage at the time of water treatment.
The filter media in the present invention may be used such as: perlite or activated carbon.
The "channel" in the present invention may be constituted by a pipe. The joints such as tee joints or elbow joints are omitted in the connection between the pipelines in the drawing.
The negative pressure water treatment equipment in the embodiment is mainly used for purifying the water quality of a swimming pool and mainly comprises the following equipment:
one or more water collectors 4 adopt tank bodies, tank bodies and other container equipment to collect water, so that the water is convenient to treat and the stability of the whole treatment system is kept.
One or more hair collectors 5 are commercially available hair collectors 5, but the present embodiment mainly aims at water purification in swimming pools, so that the hair collectors 5 are needed to be added, and the hair collectors 5 can be selected or not used in different water treatment occasions according to the needs.
The integrated overflow groove 2, the water treatment tank 1 and the water purification collecting tank 8, the overflow groove 2 is constructed on the outer ring of the water treatment tank 1, the side surface of the overflow groove 2 is provided with a water inlet and two water outlets for back flushing, a part of solid impurities can be precipitated in advance by the overflow groove 2, and water is delivered to the water treatment tank 1 on the inner ring in an overflow mode, the water purification collecting tank 8 is directly arranged below the bottom of the water treatment tank 1, so that a space isolated relative to the outside is formed by sealing the inside of the tank body and the bottom of the water treatment tank 1 through the tank body, a plurality of mounting through holes for mounting the filter plate 3 are arranged at the bottom of the water treatment tank 1, the mounting through holes simultaneously become channels for communicating the water treatment tank 1 and the water purification collecting tank 8, the side surface and the bottom surface of the water purification collecting tank 8 are also provided with a water outlet and a water inlet and a water, the water inlet and outlet on the bottom surface can be used for back flushing liquid inlet or discharging water which does not reach the standard at the beginning of treatment.
A plurality of filter plates 3, fig. 5 shows one of the filter plates 3 which can be realized, mainly comprising a hollow filter frame 16 and filter screen plates 19 at two sides of the filter frame 16, the filter frame 16 is mainly a rectangular hollow tube frame, the bottom of the filter frame 16 is provided with a pipe insertion port 18 matched with a mounting through hole at the bottom of the water treatment tank 1, the pipe insertion port 18 is inserted in the mounting through hole to hermetically communicate the hollow structure of the filter frame 16 and the purified water collecting tank 8, one side of the filter frame 16, which is positioned at the filtering space, is provided with a plurality of water inlet holes, the water inlet holes are used for communicating the filtering space with the hollow structure inside the filter frame, the aperture of the mesh on the filter screen plates 19 is generally more than 40 micrometers, the particle size of the filter medium is generally more than ten times to dozens of times larger than the aperture of the water inlet, as one of the practical examples, the particle size is about 600 microns, so that the filter medium is adsorbed on the outer surface of the filter screen plate 19 to form a filter layer. The filter screen plate 19 comprises a filter screen and a filter screen support 17, the filter screen is fixed on the filter screen support 17, the filter screen support 17 can be arranged in a manner of referring to fig. 5-7, and can be composed of an X-shaped rod piece, or a plurality of transverse rod pieces which are vertically arranged, or a plurality of vertical rod pieces which are horizontally arranged.
One or more clean water collectors 7, which are used in the operation of the swimming pool after collecting and feeding clean water into the swimming pool by adopting container equipment such as a pool body or a tank body.
The above-mentioned equipment is connected by means of pipeline so as to implement whole technological process, and its concrete process is as follows.
The outlet of the water collector 4 is communicated with the inlet of the hair collector 5 through a second pipeline 22, a first pipeline 21 is connected beside the middle part of the second pipeline 22, a first valve 31 is arranged on the first pipeline 21, a second valve 32 is arranged on the second pipeline 22 between the connection point of the first pipeline 21 and the hair collector 5,
the outlet of the hair collector 5 is communicated with the water inlet of the overflow groove 2 through a third pipeline 23, and a third valve 33 is arranged on the third pipeline 23.
Two water outlets for back flushing on the overflow trough 2 are respectively connected with a fourth pipeline 24 and a sixth pipeline 26, the fourth pipeline 24 and the sixth pipeline 26 are used for discharging back flushing water, and a fourth valve 36 and a sixth valve 36 are respectively and correspondingly arranged on the fourth pipeline 26 and the sixth pipeline 26.
A water outlet on the side surface of the purified water collecting tank 8 is communicated with an inlet of the pump 6 through an eighth pipeline 28, a seventh pipeline 27 is connected beside the middle part of the eighth pipeline 28, a seventh valve 37 is arranged on the seventh pipeline 27, an eighth valve 38 is arranged on the eighth pipeline 28 between the connecting point of the seventh pipeline 27 and the purified water collecting tank 8,
the outlet of the pump 6 is connected with a ninth pipeline 29 of an outlet channel of the water purification collector 7, a fifth pipeline 25 is connected to the middle of the ninth pipeline 29, the other end of the fifth pipeline 25 is communicated with a water inlet and a water outlet at the bottom of the water purification collecting tank 8, a tenth pipeline 30 is connected to the fifth pipeline 25, a ninth valve 39 is arranged between the connecting point of the fifth pipeline 25 and the water purification collector 7 on the ninth pipeline 29, a fifth valve 35 is arranged between the connecting point of the tenth pipeline 30 and the connecting point of the ninth pipeline 29 on the fifth pipeline 25, and a tenth valve 40 is arranged on the tenth pipeline 30.
A water quality detection point is also arranged on the ninth pipeline 29 and is used for detecting the water quality by the water quality detection device.
The main process flow of this embodiment includes a water treatment process and a backwashing process, which are implemented by opening and closing different valves, and is further described with reference to fig. 1 and fig. 2 to 4, where the pipelines in fig. 2 to 4 are represented by straight lines, and each pipeline corresponds to that in fig. 1, specifically as follows.
As shown in fig. 1 and 2, in the initial stage of the water treatment process, since the added filter medium is not completely adsorbed on the filter screen plate 19 in the filter plate 3, the water treatment can not reach the standard and needs to be discharged for retreatment, the fourth valve 34, the sixth valve 36, the seventh valve 37 and the ninth valve 39 should be closed first. The first valve 31, the second valve 32, the third valve 33, the eighth valve 38, the fifth valve 35, and the tenth valve 40 are opened. Starting the pump 6, adding a filter medium from the first pipeline 21, enabling water to flow through the second pipeline 22, the hair collector 5, the third pipeline 23, the overflow groove 2, the water treatment tank 1, the filter plate 3 and the water purification collecting tank 8 from the water treatment device, directly discharging the filter water which does not reach the standard from the bottom of the water purification collecting tank 8 to the fifth pipeline 25 to the tenth pipeline 30 when the liquid level of the water purification collecting tank 8 is lower, and discharging the filter water through the eighth pipeline 28, the pump 6, the ninth pipeline 29, the fifth pipeline 25 and the tenth pipeline 30 along with the rising of the liquid level. The discharged water may be recycled to the water collector 4 or may be treated separately.
As shown in fig. 1 and 3, the filtering medium gradually accumulates after overflowing into the water treatment tank 1, and is adsorbed on the outer side surface of the filtering screen 19 in the filtering plate 3 due to the suction action of the pump 6, so as to gradually form a stable filtering layer, the water quality gradually reaches the standard after passing through the filtering layer, after the filtering medium is added, the first valve 31 is closed, after reaching the standard through the detection point detection on the ninth pipeline 29, the fifth valve 35 and the tenth valve 40 are closed, the ninth valve 39 is opened, and the filtered water in the purified water collecting tank 8 is sent into the purified water collector 7 through the eighth pipeline 28-the pump 6-the ninth pipeline 29 for storage.
Compared with the prior art, one of the advantages of the application is that the replacement of the filter medium can be realized through backwashing, and the backwashing in the prior art generally realizes the separation of the filter medium from impurities on the filter medium, but cannot realize the replacement and recovery of the filter medium. The method is realized by the following specific steps:
as shown in fig. 1 and 4, before backwashing is performed, the first valve 31, the second valve 32, the third valve 33, the eighth valve 38, the ninth valve 39 and the tenth valve 40 are closed, the fourth valve 34, the fifth valve 35, the sixth valve 36 and the seventh valve 37 are opened, backwashing water flows in from the seventh pipeline 27 and flows through the fifth pipeline 25, the purified water collecting tank 8 and the filter plate 3 in sequence under the action of the pump 6, backwashing on the filter plate 3 is realized, the backwashing water flushes the filter medium adsorbed on the filter screen plate 19 and accumulates in the water treatment tank 1 until the filter medium reversely overflows to the overflow tank 2, and the filter medium also enters the overflow tank 2 along with the backwashing water and is discharged through the fourth pipeline 24 and the sixth pipeline 26 respectively. The collected and discharged filter medium is used for cleaning, releasing and the like of the filter medium, so that the recycling of the filter medium is realized.
It can be seen that in this embodiment, there are common conduits in both process lines, namely the backwash water inlet in the backwash process and the clean water outlet from the clean water collection tank 8 in the water treatment process share part of the eighth conduit 28, part of the ninth conduit 29, and the fifth conduit 25 in the earlier stages of the water treatment process. During the water treatment process, the addition of the filter medium and the water entering the overflow tank share part of the second pipeline 22 and the third pipeline 23.
Claims (8)
1. A negative pressure water treatment device comprises a water collector, a hair collector, an overflow trough, a water treatment pool and a pure water collector, wherein the overflow trough and the water treatment pool realize the transfer of fluid through overflow,
it is characterized by also comprising:
a water purification collecting tank arranged below the water treatment tank, the interior of the tank body is sealed by the tank body and the bottom of the water treatment tank to form a space isolated from the outside, a plurality of mounting through holes for mounting filter plates are arranged at the bottom of the water treatment tank, the mounting through holes simultaneously form a channel for communicating the water treatment tank and the water purification collecting tank, and
a plurality of filter plates arranged in the water treatment tank, wherein each filter plate comprises a filter frame and filter screen plates arranged at two sides of the filter frame, the filter screen plates at two sides and the filter frame in the middle form a filter space, the filter frame is of a hollow structure, the bottom of the filter frame is provided with an insertion pipe orifice matched with a mounting through hole at the bottom of the water treatment tank, the insertion pipe orifice is inserted into the mounting through hole to hermetically communicate the hollow structure of the filter frame and a purified water collecting tank, one side of the filter space on the filter frame is provided with a plurality of water inlet holes, the water inlet holes are used for communicating the filter space and the hollow structure in the filter frame, and the aperture of the meshes on each filter screen plate is smaller than the particle size of a filter medium,
wherein,
the outlet of the water collector is communicated with the inlet of the hair collector through a second pipeline, a first pipeline is connected beside the middle part of the second pipeline, a first valve is arranged on the first pipeline, a second valve is arranged on the second pipeline between the connection point of the first pipeline and the hair collector,
the outlet of the hair collector is communicated with the water inlet of the overflow groove through a third pipeline, a third valve is arranged on the third pipeline,
two water outlets for back flushing on the overflow trough are respectively connected with a fourth pipeline and a sixth pipeline, the fourth pipeline and the sixth pipeline are used for discharging back flushing water, a fourth valve and a sixth valve are respectively and correspondingly arranged on the fourth pipeline and the sixth pipeline,
a water outlet on the side surface of the water purification collecting tank is communicated with an inlet of the pump through an eighth pipeline, a seventh pipeline is connected beside the middle part of the eighth pipeline, a seventh valve is arranged on the seventh pipeline, an eighth valve is arranged between the connecting point of the seventh pipeline and the water purification collecting tank on the eighth pipeline,
the outlet of the pump is connected with a ninth pipeline of an inlet channel of the water purification collector, a fifth pipeline is connected beside the middle part of the ninth pipeline, the other end of the fifth pipeline is communicated with a water inlet and a water outlet at the bottom of the water purification collecting tank, a tenth pipeline is connected beside the fifth pipeline, a ninth valve is arranged on the ninth pipeline between the fifth pipeline connecting point and the water purification collector, a fifth valve is arranged on the fifth pipeline between the tenth pipeline connecting point and the ninth pipeline connecting point, and a tenth valve is arranged on the tenth pipeline,
and a water quality detection point is also arranged on the ninth pipeline and used for detecting the water quality by the water quality detection device.
2. The negative pressure water treatment device as claimed in claim 1, wherein the filter screen plate comprises a filter screen and a filter screen support, and the filter screen is fixed on the filter screen support.
3. The negative pressure water treatment device as claimed in claim 2, wherein the screen holder is formed of a bar member having an X-shape.
4. The negative pressure water treatment device as claimed in claim 2, wherein the screen support is formed by vertically arranging a plurality of horizontal bar members.
5. The negative pressure water treatment device as claimed in claim 2, wherein the screen support is formed by a plurality of vertical rods arranged in a transverse direction.
6. The negative pressure water treatment device as claimed in claim 1, wherein the filter medium comprises activated carbon or perlite.
7. A filtering method of a negative pressure water treatment device according to any one of claims 1 to 6, characterized by comprising the steps of:
at the initial stage of the water treatment process, the fourth valve, the sixth valve, the seventh valve and the ninth valve are closed, the first valve, the second valve, the third valve, the eighth valve, the fifth valve and the tenth valve are opened, the pump is opened, a filter medium is added from the first pipeline, water flows from the water treatment device through the second pipeline, the hair collector, the third pipeline, the overflow trough, the water treatment tank, the filter plate and the purified water collecting trough, when the liquid level of the purified water collecting trough is low, the filtered water which does not reach the standard is directly discharged from the bottom of the purified water collecting trough to the fifth pipeline and then to the tenth pipeline, and as the liquid level rises, the filtered water is discharged through the eighth pipeline, the pump, the ninth pipeline, the fifth pipeline and the tenth pipeline,
the filter medium is adsorbed on the outer side of the filter screen plate in the filter plate due to the suction effect of the pump to form a stable filter layer, after the filter medium is added, the first valve is closed, the fifth valve and the tenth valve are closed after the water quality is detected to reach the standard by the detection point on the ninth pipeline, the ninth valve is opened, and the filtered water in the purified water collecting tank is sent to the purified water collector through the eighth pipeline, the pump and the ninth pipeline for storage.
8. A back washing method of a negative pressure water treatment device according to any one of claims 1 to 6, characterized in that the first valve, the second valve, the third valve, the eighth valve, the ninth valve and the tenth valve are closed, the fourth valve, the fifth valve, the sixth valve and the seventh valve are opened, back washing water flows in from the seventh pipeline, passes through the fifth pipeline, the purified water collecting tank and the filter plate in sequence under the action of a pump, so as to realize back washing of the filter screen plate in the filter plate, the back washing water is accumulated in the water treatment tank until the back washing water overflows to the overflow tank, and a filter medium enters the overflow tank along with the back washing water and is discharged through the fourth pipeline and the sixth pipeline respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910332427.4A CN110575687B (en) | 2019-04-24 | 2019-04-24 | Negative pressure water treatment device and filtering method and back flushing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910332427.4A CN110575687B (en) | 2019-04-24 | 2019-04-24 | Negative pressure water treatment device and filtering method and back flushing method thereof |
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| Publication Number | Publication Date |
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| CN110575687A CN110575687A (en) | 2019-12-17 |
| CN110575687B true CN110575687B (en) | 2021-08-13 |
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| CN1657134A (en) * | 2004-02-20 | 2005-08-24 | 深圳市清泉水系统工程设备有限公司 | Reverse filtering air water back flushing filtering pond and reverse filtering air water back flushing method |
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| CN101537273B (en) * | 2009-04-04 | 2010-12-08 | 湖北五瑞生物工程有限公司 | Fully sealed plate vane-type purification filter |
| CN102234141B (en) * | 2010-04-30 | 2013-05-08 | 周玉兰 | Single-pump running negative-pressure fluid treatment device |
| CN102417250B (en) * | 2011-10-10 | 2013-03-20 | 北京建筑工程学院 | Dynamic membrane purification reactor and method for removing phosphorus from regenerated water |
| CN202844743U (en) * | 2012-10-26 | 2013-04-03 | 天津太平洋机电技术及设备有限公司 | Back wash water zero-emission environment-friendly sheet frame reversible type diatomite filtering machine |
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