CN110711414B - Double-bed medium filter - Google Patents
Double-bed medium filter Download PDFInfo
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- CN110711414B CN110711414B CN201810760534.2A CN201810760534A CN110711414B CN 110711414 B CN110711414 B CN 110711414B CN 201810760534 A CN201810760534 A CN 201810760534A CN 110711414 B CN110711414 B CN 110711414B
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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
- B01D24/28—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed moving during the filtration
- B01D24/32—Rotation
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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
- B01D24/007—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with multiple filtering elements in series connection
- B01D24/008—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with multiple filtering elements in series connection arranged concentrically or coaxially
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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
- B01D24/10—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 held in a closed container
- B01D24/16—Upward filtration
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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
- B01D24/36—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed fluidised during the filtration
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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
- B01D24/38—Feed or discharge devices
- B01D24/40—Feed or discharge devices for feeding
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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
- B01D24/46—Regenerating the filtering material in the filter
- B01D24/4605—Regenerating the filtering material in the filter by scrapers, brushes, nozzles or the like placed on the cake-side of the stationary filtering material and only contacting the external layer
- B01D24/4621—Regenerating the filtering material in the filter by scrapers, brushes, nozzles or the like placed on the cake-side of the stationary filtering material and only contacting the external layer by nozzles acting on the cake side of the filter material, or by fluids acting in co-current direction with the feed stream
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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
- B01D24/48—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof integrally combined with devices for controlling the filtration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/02—Combinations of filters of different kinds
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to a double-bed medium filter, which comprises a water purification valve, a sewage valve, a water outlet pipe, a tank body, a screen, a first water distributor, a water inlet pipe, a second water distributor, a flushing water inlet pipe, a medium, a flushing pump, a water supply pump, a bag filter and a control system. The invention adopts a fluidized bed reinforced fixed bed structure, and the liquid can realize high-precision filtering effect through multi-stage filtering and purification of double beds; when the device works, the medium particles are in a motion state, so that the characteristic of high activity of the medium is kept, and the hardening problem is completely avoided; in the working process, pollutants of different particles are classified and treated, so that the washing effect is good, the washing time is short, and the washing water quantity is small; the invention has simple structure, can realize the combination of a plurality of filters into a whole, realizes the filtration of large flow and reduces the occupied area; in addition, the filter is organically combined with the bag filter, so that the high-precision, large-flow and long-efficiency online self-cleaning of the filter can be realized, and no cleaning wastewater is generated.
Description
Technical Field
The invention belongs to the field of solid-liquid separation, particularly belongs to the field of long-period operation of chemical and water treatment filtering equipment, and relates to a double-bed medium filter which is widely applied to solving the operation problems that the existing medium filter is low in filtering precision, small in treatment capacity, easy to harden, and needs frequent shutdown for backwashing and generates a large amount of backwashing wastewater.
Background
The medium filter is widely used in the industries of petroleum, chemical industry, energy, water treatment and the like. However, as the service life of the filter increases, the hardening phenomenon of the filter inevitably occurs, so that the efficiency of the filter is reduced, the resistance is increased, and the normal operation of the filter is affected. The self-cleaning of the existing filter generally adopts a back washing mode, and the mode has a plurality of defects: one is that the filter needs to be shut down during backwashing and a large amount of backwash wastewater is generated. In addition, the existing medium filter also has the problems of low filtering precision, small processing capacity and large occupied area; a novel filter is developed to replace a traditional filter, so that the filtering precision and efficiency of the filter can be improved, the running time of the device is effectively prolonged, the running cost is reduced, and great economic benefits are achieved.
Disclosure of Invention
The invention aims to solve the technical problems that the filter in the prior art is easy to harden and block, the filtering effect is obviously reduced after long-term use, the filtering precision is low, the processing capacity is small, online cleaning cannot be carried out, and a large amount of backwashing wastewater is generated; provided is a double-bed media filter which has high filtration accuracy, high flow rate, small floor space, can realize on-line self-cleaning, does not generate backwashing wastewater, and can maintain stable filtration effect for a long period.
The technical scheme of the invention for realizing the aim is realized as follows:
a double-bed medium filter comprises a water purification valve 1, a sewage valve 2, a water outlet pipe 3, a tank 4, a screen 5, a first water distributor 6, a water inlet pipe 7, a second water distributor 8, a flushing water inlet pipe 9, a medium 10, a flushing pump 11, a water supply pump 12 and a control system.
The method is characterized in that: the water outlet pipe 3 is positioned at the top of the filter tank body 4, and the outlet end of the water outlet pipe 3 is respectively provided with a purified water valve 1 and a sewage valve 2; a screen 5 is arranged below the outlet pipe 3, an expansion space is arranged between the medium 10 and the screen 5, the first water distributor 6 is positioned in the middle of the tank 4, the second water distributor 8 is positioned at the bottom of the tank 4, the first water distributor 6 and the second water distributor 8 are respectively connected with a water inlet pipe 7, and the water inlet pipe 7 is positioned between the two water distributors; the water outlet of the flushing water inlet pipe 9 is positioned at the bottom of the tank body 4.
The double-bed medium filter is characterized in that a first water distributor 6 is positioned in the middle of a tank 4, and a second water distributor 8 is positioned at the bottom of the tank 4; the second water distributor 8 is used for expanding the medium in the tank 4 to be in a fluidized state; the first water distributor 6 has the following functions: firstly, the medium above the water distributor 6 forms a fixed bed, and secondly, the medium below the fixed bed rotates at a high speed; therefore, the water outlets of the first water distributor 6 and the second water distributor 8 are arranged in the circumferential tangential direction, and the water quantity entering the second water distributor 8 meets the requirement that the medium 10 in the tank 4 can be fully expanded and just stays in a fluidized state. During operation, all liquid is filtered and purified for many times through the fluidized bed and the fixed bed, so that a high-precision filtering effect is realized.
The double-bed medium filter is characterized in that the outlet of the water outlet pipe 3 is provided with a water purifying valve 1 and a sewage valve 2, the caliber of the water purifying valve 1 meets the requirement of the outlet water flow of the filter in normal operation, and the caliber of the sewage valve 2 meets the requirement of the sewage discharge flow in flushing; when the filter works, the water purifying valve 1 is fully opened, and the sewage valve 2 is closed; when flushing, the sewage valve 2 is fully opened, and the purified water valve 1 is closed.
The double-bed medium filter is characterized in that a washing water inlet pipe 9 is arranged, and the water inflow of the washing water inlet pipe 9 meets the requirement that the medium 10 in the tank body 4 can be completely expanded and just stays in a fluidized state. Thus, good flushing effect, low flushing water quantity and short flushing time can be ensured.
The double-bed medium filter is characterized in that a screen 5 is arranged at the upper part of a tank body 4, and the aperture of the screen 5 is smaller than the minimum particle size of medium particles.
The double-bed medium filter is characterized in that a plurality of double-bed medium filters are combined, the plurality of filters can be vertically or horizontally arranged and combined, the number of the filters is more than two, and the plurality of filters share one water supply pump and one flushing pump; the flow of the water supply pump needs to meet the flow of the simultaneous work of a plurality of filters, the flow of the flushing pump meets the flushing flow of one filter, and the working mode of the flushing pump is that the filters are flushed one by one; therefore, the filter has large treatment capacity and small occupied area.
The double-bed medium filter is characterized in that one filter or a combination of a plurality of filters and a bag filter, the bag filter can be one or a plurality of filters, the flow rate of the bag filter meets the requirement of flushing and sewage discharge flow rate of a single double-bed medium filter, and thus, the on-line cleaning of the double-bed medium filter can be realized by an automatic control system and the operation without sewage discharge can be realized.
The invention has the beneficial effects that: can ensure high filtering precision, large treatment capacity, no hardening, online self-cleaning, no production and sewage waste water production and efficient and continuous operation of the filter.
Drawings
Fig. 1 is a general structural schematic diagram of the double-bed media filter, and a filter tank body is of a single-tank body structure.
Fig. 2 is a general structural schematic diagram of the double-bed medium filter, and a filter tank body is of a multi-tank vertical structure.
Fig. 3 is a general structural schematic diagram of the double-bed media filter, and a filter tank body is a single-tank body and bag filter combined structure.
Fig. 4 is a general structural schematic diagram of the double-bed media filter, and a filtering tank body is a combined structure of a multi-tank body and a bag filter.
A double-bed medium filter is shown in figure 1 and comprises a water purification valve 1, a sewage valve 2, a water outlet pipe 3, a tank 4, a screen 5, a first water distributor 6, a water inlet pipe 7, a second water distributor 8, a flushing water inlet pipe 9, medium particles 10, a flushing pump 11, a water supply pump 12 and a control system.
Liquid to be filtered enters the tank body 4 through the water inlet pipe 7 and is divided into two paths, wherein one path enters the first water distributor 6, and the other path enters the second water distributor 8; when the liquid entering the second water distributor 8 rotates to push the medium particles 10 to rotate and expand upwards under the action of the water distributors, and the liquid expands upwards to reach the position of the first water distributor 6, the medium particles 10 are pushed to the upper screen 5 of the tank 4 and are intercepted by the screen 5 under the combined action of the liquid at the outlets of the first water distributor 6 and the second water distributor 8, and the intercepted medium particles 10 are increasingly formed into a fixed filter bed; in the lower part of the fixed bed, the medium particles 10 rotate under the action of liquid and are in a fluidized state to form a fluidized bed; the liquid entering the tank body subsequently rotates firstly, then enters the fluidized bed to be fully mixed and contacted with the medium particles in the fluidized bed, then enters the fixed bed to be intercepted and adsorbed by the medium particles in the fixed bed, then enters the upper part of the tank body 4 through the screen 5, and flows out of the tank body through the water purifying valve 1 of the water outlet pipe 3, so that the filtration and purification of the liquid are completed. When the pollutant in the fixed bed is more and more, the pressure difference between the inlet and the outlet is increased to a certain value, the filter needs to be cleaned, the clean water valve 1 is closed, the sewage valve 2 is opened, the flushing pump 11 is started, the fixed bed is damaged because the flow entering the tank body is lower than the flow required for maintaining the fixed bed, all medium particles in the tank body are in a fluidized state, friction and touch occur among the particles, when clean liquid flows upwards from the lower part of the tank body through the flushing water inlet pipe 9, the pollutant is separated from the medium particles 10, under the pushing of the liquid, the pollutant enters the water outlet pipe 3 through the screen 5 and is discharged through the sewage valve 2, and therefore the flushing and the regeneration of the medium are completed.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Embodiment 1, as shown in fig. 1, comprises a purified water valve 1, a sewage valve 2, a water outlet pipe 3, a tank 4, a screen 5, a first water distributor 6, a water inlet pipe 7, a second water distributor 8, a flushing water inlet pipe 9, medium particles 10, a flushing pump 11, a water supply pump 12, and a control system.
The working process of the double-bed medium filter is as follows: liquid enters the filter tank 4 from the water inlet pipe 7 through the first water distributor 6 and the second water distributor 8 respectively under the action of the water supply pump 12, after flowing through the fluidized bed and the fixed bed, clean liquid flows out of the tank 4 through the screen 5, the water outlet pipe 3 and the water purification valve 1, suspended matters in the liquid are intercepted by medium particles and are adsorbed in the fluidized bed and the fixed bed, and thus, the filtration and purification of the liquid are completed. The washing and regeneration process of the medium particles comprises the following steps: clean liquid enters the bottom of the tank body 4 from the washing inlet pipe 9 under the action of the washing pump 11 and flows from bottom to top, because the flow entering the tank body is lower than the flow required for maintaining the fixed bed, the fixed bed is damaged, all medium particles in the tank body are in a fluidized state, friction and touch occur among the particles, when the clean liquid flows upwards from the lower part of the tank body through the washing inlet pipe 9, pollutants are separated from the medium particles 10, under the pushing of the liquid, the pollutants enter the water outlet pipe 3 through the screen 5 and are discharged through the sewage valve 2, and thus the washing and regeneration of the medium are completed.
Compared with the existing medium filter, the design has the advantages of greatly increased treatment capacity, no hardening, long forward flushing period and less forward flushing water amount.
In the embodiment 2, as shown in the attached figure 2, the filter tank body is of a multi-tank vertical parallel structure.
Liquid enters the tank body from the water inlet pipe 7 of each filter under the action of the water supply pump 12, enters the filter tank body 4 through the first water distributor 6 and the second water distributor 8 of each tank body respectively, flows through the fluidized bed and the fixed bed, clean liquid flows out of the tank body 4 through the screen 5, the water outlet pipe 3 and the water purification valve 1, and suspended matters in the liquid are intercepted by medium particles and adsorbed in the fluidized bed and the fixed bed, so that the filtration and the purification of the liquid are completed. The flushing and regeneration of the media particles in each filter is performed individually, i.e.: when one filter is in regeneration flushing, other filters are in work, and when one filter finishes regeneration flushing, the regeneration flushing of the next filter is carried out. The regeneration flushing process comprises the following steps: clean liquid enters the bottom of the tank body 4 from the washing inlet pipe 9 under the action of the washing pump 11 and flows from bottom to top, because the flow entering the tank body is lower than the flow required for maintaining the fixed bed, the fixed bed is damaged, all medium particles in the tank body are in a fluidized state, friction and touch occur among the particles, when the clean liquid flows upwards from the lower part of the tank body through the washing inlet pipe 9, pollutants are separated from the medium particles 10, under the pushing of the liquid, the pollutants enter the water outlet pipe 3 through the screen 5 and are discharged through the sewage valve 2, and thus the washing and regeneration of the medium are completed.
The parallel connection can be vertical or planar; the number of filter tanks connected in parallel is not limited; the regeneration and flushing operation control may be set to automatic control and manual operation, and is generally automatic control.
The structure can increase the processing scale of the filter, reduce the occupied area and save the investment of users.
Example 3, as shown in figure 3, the filter tank was a single tank plus bag filter construction.
As shown in the attached figure 3, the device comprises a water purification valve 1, a sewage valve 2, a water outlet pipe 3, a tank 4, a screen 5, a first water distributor 6, a water inlet pipe 7, a second water distributor 8, a flushing water inlet pipe 9, medium particles 10, a flushing pump 11, a water supply pump 12, a bag filter 13 and a control system.
The invention relates to a double-bed medium filter, which comprises the following working procedures: liquid enters the filter tank 4 from the water inlet pipe 7 through the first water distributor 6 and the second water distributor 8 respectively under the action of the water supply pump 12, after flowing through the fluidized bed and the fixed bed, clean liquid flows out of the tank 4 through the screen 5, the water outlet pipe 3 and the water purification valve 1, suspended matters in the liquid are intercepted by medium particles and are adsorbed in the fluidized bed and the fixed bed, and thus, the filtration and purification of the liquid are completed. The washing and regeneration process of the medium particles comprises the following steps: clean liquid filtered by the bag filter enters the bottom of the tank body 4 from the flushing water inlet pipe 9 under the action of the flushing pump 11 and flows from bottom to top, because the flow entering the tank body is lower than the flow required for maintaining the fixed bed, the fixed bed is damaged, medium particles in the tank body are in a fluidized state completely, friction and touch occur among the particles, when the clean liquid flows upwards from the lower part of the tank body through the flushing water inlet pipe 9, pollutants are separated from the medium particles 10, and under the pushing of the liquid, the pollutants enter the water outlet pipe 3 through the screen 5 and are discharged to the bag filter 13 through the sewage valve 2, so that the flushing and regeneration of the medium are completed.
The amount of filtration of the bag filter 13 is greater than the flow rate of the flush pump 11.
This way, no sewage discharge can be realized during filter regeneration and flushing.
Example 4, as shown in figure 4, the filtration canister is a multi-canister plus bag filter construction.
Liquid enters the tank body from the water inlet pipe 7 of each filter under the action of the water supply pump 12, enters the filter tank body 4 through the first water distributor 6 and the second water distributor 8 of each tank body respectively, flows through the fluidized bed and the fixed bed, clean liquid flows out of the tank body 4 through the screen 5, the water outlet pipe 3 and the water purification valve 1, and suspended matters in the liquid are intercepted by medium particles and adsorbed in the fluidized bed and the fixed bed, so that the filtration and the purification of the liquid are completed. The flushing and regeneration of the media particles in each filter is performed individually: when one filter is in regeneration flushing, other filters are in work, and when one filter finishes regeneration flushing, the regeneration flushing of the next filter is carried out. The regeneration flushing process comprises the following steps: clean liquid filtered by the bag filter 13 enters the bottom of the tank body 4 from the flushing water inlet pipe 9 under the action of the flushing pump 11 and flows from bottom to top, because the flow entering the tank body is lower than the flow required for maintaining the fixed bed, the fixed bed is damaged, medium particles in the tank body are in a fluidized state completely, friction and touch occur among the particles, when the clean liquid flows upwards from the lower part of the tank body through the flushing water inlet pipe 9, pollutants are separated from the medium particles 10, under the pushing of the liquid, the pollutants enter the water outlet pipe 3 through the screen 5 and are discharged to the bag filter 13 through the sewage valve 2, and then enter the flushing pump 11, so that the flushing and the regeneration of the medium are completed, and the pollutants in the bag filter 13 are cleaned manually at regular intervals.
The bag filters 13 may be used in one or more parallel.
The design can realize the on-line cleaning of the filter, does not produce sewage and wastewater, greatly improves the efficiency of the filter and saves water resources.
Claims (6)
1. A double-bed medium filter comprises a water purification valve (1), a sewage valve (2), a water outlet pipe (3), a tank body (4), a screen (5), a first water distributor (6), a water inlet pipe (7), a second water distributor (8), a flushing water inlet pipe (9), a medium (10), a flushing pump (11), a water supply pump (12) and a control system; the method is characterized in that: the water outlet pipe (3) is positioned at the top of the filter tank body (4), and the outlet end of the water outlet pipe (3) is respectively provided with a water purifying valve (1) and a sewage valve (2); a screen (5) is arranged below the outlet pipe (3), an expansion space is arranged between the medium (10) and the screen (5), the first water distributor (6) and the second water distributor (8) are respectively connected with the water inlet pipe (7), and the water inlet pipe (7) is positioned between the two water distributors; the water outlet of the flushing water inlet pipe (9) is positioned at the bottom of the tank body (4); the first water distributor (6) is positioned in the middle of the tank body (4), and the second water distributor (8) is positioned at the bottom of the tank body (4); the second water distributor (8) is used for expanding the medium in the tank body (4) to be in a fluidized state; the first water distributor (6) has the following functions: firstly, the medium above the water distributor (6) forms a fixed bed, and secondly, the medium below the fixed bed rotates at a high speed; therefore, the water outlets of the first water distributor (6) and the second water distributor (8) are arranged in the circumferential tangential direction; the water quantity entering the second water distributor (8) is required to meet the requirement that the medium (10) in the tank body (4) can be expanded and just stays in a fluidized state; during operation, all liquid is filtered and purified for many times through the fluidized bed and the fixed bed, so that a high-precision filtering effect is realized.
2. A double-bed medium filter as claimed in claim 1, wherein the outlet of the outlet pipe (3) is provided with a purified water valve (1) and a sewage valve (2), the caliber of the purified water valve (1) meets the requirement of the outlet water flow of the filter in normal operation, and the caliber of the sewage valve (2) meets the requirement of the sewage flow in flushing; when the filter works, the water purifying valve (1) is fully opened, and the sewage valve (2) is closed; when flushing, the sewage valve (2) is fully opened, and the water purifying valve (1) is closed.
3. A dual bed media filter as claimed in claim 1 wherein a flush inlet (9) is provided, the flush inlet (9) being of such a water intake that the media (10) in the tank (4) can expand to just be in a fluidised state; thus, good flushing effect, low flushing water quantity and short flushing time can be ensured.
4. A dual bed media filter as claimed in claim 1 wherein the upper part of the tank (4) is provided with a screen (5), the screen (5) having a pore size smaller than the smallest particle size of the media particles.
5. A dual-bed media filter as claimed in claim 1, wherein a plurality of dual-media filters are combined, the plurality of filters are combined in a vertical or planar arrangement, the number of filters is two or more, and the plurality of filters share a water supply pump and a washing pump; the flow of the water supply pump needs to meet the flow of the simultaneous work of a plurality of filters, the flow of the flushing pump meets the flushing flow of one filter, and the working mode of the flushing pump is that the plurality of filters are flushed one by one, so that the large treatment capacity and the small occupied area of the filters can be realized.
6. A dual bed media filter as claimed in claim 1 wherein one or more filters are combined with a bag filter, the bag filter or filters being one or more, at a flow rate to meet the flushing blowdown flow rate requirements of a single dual bed media filter, such that on-line cleaning of the dual bed media filter and operation without blowdown water is achieved by means of the automated control system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810760534.2A CN110711414B (en) | 2018-07-12 | 2018-07-12 | Double-bed medium filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810760534.2A CN110711414B (en) | 2018-07-12 | 2018-07-12 | Double-bed medium filter |
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| CN110711414A CN110711414A (en) | 2020-01-21 |
| CN110711414B true CN110711414B (en) | 2021-11-02 |
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| CN115228156B (en) * | 2021-04-22 | 2024-01-30 | 北京奥博水处理有限责任公司 | Double-bed medium filtering device |
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