CN109621505B - Efficient operation control method of concentrator and efficient concentrator - Google Patents
Efficient operation control method of concentrator and efficient concentrator Download PDFInfo
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- CN109621505B CN109621505B CN201811486926.0A CN201811486926A CN109621505B CN 109621505 B CN109621505 B CN 109621505B CN 201811486926 A CN201811486926 A CN 201811486926A CN 109621505 B CN109621505 B CN 109621505B
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- thickener
- filter
- filter plate
- backflushing
- shell
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002562 thickening agent Substances 0.000 claims abstract description 85
- 239000007788 liquid Substances 0.000 claims abstract description 81
- 239000000706 filtrate Substances 0.000 claims abstract description 19
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 71
- 239000002002 slurry Substances 0.000 abstract description 21
- 239000012065 filter cake Substances 0.000 description 18
- 238000011010 flushing procedure Methods 0.000 description 12
- 238000000926 separation method Methods 0.000 description 12
- 238000001914 filtration Methods 0.000 description 10
- 239000007787 solid Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004566 building material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/003—Filters formed by clamping together several filtering elements or parts of such elements integrally combined with devices for controlling the filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/12—Filter presses, i.e. of the plate or plate and frame type
- B01D25/21—Plate and frame presses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
- B01D25/32—Removal of the filter cakes
- B01D25/325—Removal of the filter cakes counter-current flushing, e.g. by air bumps
- B01D25/327—Removal of the filter cakes counter-current flushing, e.g. by air bumps with backwash shoes, with nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/12—Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a high-efficiency operation control method of a thickener and the high-efficiency thickener. The operation control method adopts the technical measures that all filter plates in a thickener are divided into a plurality of groups, each filter plate group is provided with a backflushing system and a liquid discharging system which can be independently controlled, and the backflushing system and the liquid discharging system of each filter plate group are controlled to be in an interlocking state; in the continuous feeding process of the thickener, each filter plate group discharges filtrate through a respective liquid discharge system, each filter plate group is stripped by a respective backflushing system, and each filter plate group in the thickener cannot perform backflushing action at the same time. The invention ensures that the concentration efficiency of the thickener is high, the concentration of slurry can be effectively improved, and the economy is excellent.
Description
Technical Field
The invention relates to a thickener, in particular to a thickener efficient operation control method and a thickener.
Background
The thickener is used for concentrating and clarifying slurry, and is widely applied to industries such as mineral separation, metallurgy, chemical industry, coal, building materials, environmental protection and the like.
The thickener mainly comprises a shell, a feeding system, a backflushing system (usually an air inlet system), a liquid discharging system, a storage hopper and a plurality of filter plates, wherein the feeding system, the backflushing system (usually the air inlet system) and the liquid discharging system are arranged on the shell; each filter plate is of a hollow structure with a filter cavity, the filter cavity of each filter plate is provided with a fluid port, and the filter plates are communicated with a backflushing system and a drainage system through the fluid ports. The operation control process is that the feeding system sends the slurry to be concentrated into the shell and is positioned outside the filter plates, each filter plate carries out solid-liquid separation on the slurry in the shell under the action of pressure, the separated filtrate enters the liquid discharge system through the filter cavity and the fluid port on the filter plate and is discharged out of the shell, and the solid part is adhered on the filter plate; when the accumulated filter cakes on the filter plates reach a certain thickness to influence the solid-liquid separation function of the filter plates, a backflushing system is required to be started, backflushing medium (usually compressed air) of the backflushing system enters the filter cavity of the filter plates through the fluid ports to backflush the filter plates, so that the filter cakes adhered to the surfaces of the filter plates are stripped and fall into a bin hopper, and the bin hopper is started to realize unloading according to the requirement on the concentration of slurry; based on the connection and coordination relation between the filter plate and the backflushing system as well as between the filter plate and the liquid discharge system, in order to avoid the backflushing medium of the backflushing system entering the liquid discharge system to influence the backflushing effect and the filtrate entering the backflushing system to influence the normal operation of the backflushing system, the backflushing system and the liquid discharge system on the thickener are controlled to be in an interlocking state, namely, the liquid inlet end of the liquid discharge system is required to be closed when the backflushing system is started, and the outlet end of the backflushing system is required to be closed when the liquid discharge system is started.
As can be seen from the operation control process of the thickener, when the filter cake is stripped, the back flushing pressure needs to be injected into the shell, and the liquid discharge system is closed, so that the feeding system needs to stop feeding and wait for the filter cake to be stripped and then feed, and when the filter cake is stripped, a pressure relief point needs to be formed on the shell, namely, the bin is opened, that is, when the filter cake is stripped, the thickener needs to stop feeding and open the bin on the shell, so that the back flushing can be realized. Undoubtedly, this kind of thickener makes concentration inefficiency because of the intermittent type formula of feeding, and in addition, opens the release mode of feed bin bucket and makes concentrated thick liquids concentration limited, can not directly realize the concentrated processing of high concentration thick liquids, and overall operation economy is poor.
Disclosure of Invention
One of the technical purposes of the invention is as follows: aiming at the defects of the prior art, the efficient operation control method of the thickener is provided, which can continuously feed, has high concentration efficiency and can effectively promote the concentration of slurry.
The second technical purpose of the invention is that: aiming at the defects of the prior art, the efficient thickener capable of continuously feeding, achieving high concentration efficiency and effectively improving concentration of slurry is provided.
The technical scheme adopted by the invention for realizing one of the technical purposes is as follows: the efficient operation control method of the thickener adopts the technical measures that all filter plates in the thickener are divided into a plurality of groups, each filter plate group is provided with a backflushing system and a liquid discharge system which can be independently controlled, and the backflushing system and the liquid discharge system of each filter plate group are controlled to be in an interlocking state; in the continuous feeding process of the thickener, each filter plate group discharges filtrate through a respective liquid discharge system, each filter plate group is stripped by a respective backflushing system, and each filter plate group in the thickener cannot perform backflushing action at the same time.
As one preferable scheme, all filter plates in the thickener are grouped, and a plurality of filter plates which are arranged in series are grouped into a group. Further, the bin hopper at the bottom of the thickener is divided into a plurality of bins according to the grouping of the filter plates, and each bin hopper is positioned below the corresponding filter plate group.
The second technical proposal adopted by the invention for realizing the technical purpose is as follows: the utility model provides a high-efficient thickener, includes casing and inlet pipe, a plurality of filter has been arranged in the casing in proper order, and every filter is for having the hollow structure of filter chamber, and the filter chamber of every filter has fluid port, the inlet pipe is used for will waiting to concentrate thick liquids to send into in the casing, and be in the outside of filter, all filter in the casing divide into the multiunit, and each filter of every filter group is put through recoil system and drain system through the fluid port switch on respectively, and recoil system and the drain system that every filter group is connected can independent control respectively, and the control of recoil system and drain system of every filter group keeps interlocking state.
As one of the preferred schemes, the shell is provided with a plurality of sections of mutually independent fluid guide cavities, all filter plates in the shell are divided into a plurality of groups corresponding to each section of fluid guide cavity on the shell, each filter plate group is communicated with the corresponding fluid guide cavity through a fluid port on each filter plate, each section of fluid guide cavity is provided with a liquid outlet pipe joint capable of being connected with a liquid discharge pipe and provided with a control valve, a backflush pipe joint capable of being connected with a backflush pipe and provided with a control valve, and the backflush pipe joint connected with each section of fluid guide cavity and the control valve of the liquid outlet pipe joint are in an interlocking state.
As one of the preferable schemes, the high-efficiency thickener also comprises a liquid discharge pipe which is communicated with a liquid outlet pipe joint connected with each section of fluid guide cavity on the shell.
As one of the preferable schemes, the high-efficiency thickener also comprises a back flushing pipe, and the back flushing pipe is communicated with a back flushing pipe joint connected with each section of fluid guiding cavity on the shell.
As one of the preferable schemes, the bottom of the shell is connected with a bin hopper which extends downwards. Further, the bin hopper connected with the bottom of the shell is divided into a plurality of corresponding sections of fluid guide cavities on the shell, and each bin hopper is positioned below the corresponding fluid guide cavity.
The technical scheme adopted by the invention for realizing one of the technical purposes has the beneficial technical effects that:
1. According to the operation control method, all filter plates in the shell are grouped, and the control of the backflushing system and the liquid discharge system of each filter plate group can realize differential independent control, so that when a certain filter plate group is subjected to filter cake stripping, other filter plate groups can perform solid-liquid separation work as usual, the filter plate group doing work as usual can effectively ensure continuous feeding of the thickener, and simultaneously can realize unloading of the backflushing pressure of the filter plate group for stripping the current filter cake, so that the thickener has high concentration efficiency, can effectively promote concentration of slurry, and has excellent economical efficiency;
2. The operation control method of the invention divides all the filter plates in the thickener into groups, and divides a plurality of continuously arranged filter plates into a group, thus being beneficial to easily, conveniently and reliably controlling the operation of each filter plate group in the thickener, and simultaneously being beneficial to simplifying the arrangement of external pipelines of the thickener; in addition, the hopper of the thickener is favorably grouped according to the grouping of the filter plates, so that the concentration of the slurry by each filter plate group can be further and reliably controlled;
The second technical proposal for realizing the technical purpose of the invention has the beneficial technical effects that:
1. According to the efficient thickener provided by the invention, all filter plates in the shell are grouped, and the control of the backflushing system and the liquid discharge system of each filter plate group can realize differential independent control, so that when a certain filter plate group is used for stripping a filter cake, other filter plate groups can perform solid-liquid separation work as usual, the filter plate group doing work as usual can effectively ensure continuous feeding of the thickener, and simultaneously can realize unloading of the backflushing pressure of the filter plate group for stripping the filter cake, so that the thickener is high in concentration efficiency, can effectively promote concentration of slurry, and is excellent in economical efficiency;
2. the grouping of all the filter plates in the efficient thickener is realized through the multi-section mutually independent fluid guide cavities, so that a plurality of filter plates which are continuously arranged can be divided into a group, the operation control of each filter plate group in the thickener is facilitated, and meanwhile, the arrangement of the external pipelines of the thickener is simplified;
3. The high-efficiency thickener divides the bin hopper at the bottom of the shell into a plurality of bins according to the fluid guide cavities on each section of the shell, and each bin hopper is positioned below the corresponding fluid guide cavity, so that the bins on the thickener are grouped according to the grouping of the filter plates, and the concentration of the slurry by each filter plate group can be further and reliably controlled.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The meaning of the symbols in the figures: 1-a shell; 2-feeding pipe; 3-a fluid guiding chamber; 4-a recoil pipe joint; 5-a liquid outlet pipe joint; 6-a filter plate; 7-a backwash tube; 8-fluid port; 9, a bin hopper; 10-a liquid discharge pipe.
Detailed Description
The invention relates to a thickener, in particular to a thickener efficient operation control method and a thickener, and the main technical content of the invention is described in detail in a plurality of embodiments. In the detailed description of the present invention, embodiment 1 is shown in the accompanying drawings, i.e. fig. 1, and other embodiments are not drawn separately, but the main structure of the embodiment 1 can still be referred to in the drawings. It is to be noted here in particular that the figures of the invention are schematic, which for the sake of clarity have simplified unnecessary details in order to avoid obscuring the technical solutions of the invention which contribute to the state of the art.
Example 1
The invention relates to a high-efficiency operation control method of a thickener, which is realized based on the structural change of the thickener, and adopts the following technological measures:
dividing all filter plates in the thickener into groups of a plurality (typically ten or less) of filter plates arranged consecutively in the thickener, such that all filter plates in the thickener are divided into a plurality of filter plate groups; correspondingly, the bin hoppers at the bottom of the thickener are divided into a plurality of bins according to the grouping of the filter plates, so that each bin hopper is positioned below the corresponding filter plate group, and the opening and closing of each bin hopper can be independently controlled;
-each filter panel set has connected thereto a backflushing system and a drainage system capable of independent control, and the backflushing system and the drainage system of each filter panel set are controlled to remain interlocked; that is, the control of the backflushing systems of the filter plate groups is independent of each other, and the control of the drain systems of the filter plate groups is also independent of each other, but the control of the backflushing systems and the drain systems of the same filter plate group is required to be kept in an interlocking state;
-during the continuous feeding of the thickener, each filter plate group is drained of filtrate through a respective drain system; when filter cakes are respectively formed by stacking the filter plate groups, the filter cake stripping is respectively carried out on the filter plate groups through respective backflushing systems according to different front and back sequences, that is, the backflushing action of the filter plate groups in the thickener cannot be carried out simultaneously.
The efficient operation control method of the thickener is converted into the structural design of the thickener, so that the efficient thickener of the invention can be formed.
Referring to fig. 1, the high efficiency thickener of the present invention includes a housing 1, a feed pipe 2, a drain pipe 10, and a backflushing pipe 7 disposed on the housing 1.
Wherein, the shell 1 is placed horizontally on the frame, a plurality of sections of fluid guiding cavities 3 are fixed at the top in the shell 1 along the length direction of the shell 1, and the fluid guiding cavities 3 are kept independent. Each section of fluid guide cavity 3 is connected with a liquid outlet pipe joint 5 and a backflushing pipe joint 4 which can extend out of the shell 1; the liquid outlet pipe joint 5 is provided with an independent control valve, the backflushing pipe joint 4 is also provided with an independent control valve, but the control valves of the backflushing pipe joint 4 and the liquid outlet pipe joint 5 connected with the same section of fluid guide cavity 3 are required to be in an interlocking state, namely, when the backflushing pipe joint 4 is conducted, the liquid outlet pipe joint 5 is closed, otherwise, when the liquid outlet pipe joint 5 is conducted, the backflushing pipe joint 4 is closed.
A plurality of filter plates 6 are sequentially arranged in the longitudinal direction in the housing 1. Each filter plate 6 mainly comprises a plate frame, rib plates fixed on at least one side (usually two sides) of the plate frame, and a filtering membrane/filtering cloth coated on the rib plates, wherein the plate frame and the rib plates form a filtering cavity capable of discharging filtrate, a plurality of filtrate channels communicated with the filtering cavity are formed in the rib plates, and each filter plate 6 is of a hollow structure with the filtering cavity; in addition, the top of the frame of each filter plate 6 is provided with a fluid port 8 for the flow of filtrate or backflushing medium. All the filter plates 6 in the housing 1 are divided into groups corresponding to the sections of the fluid guiding cavities 3 on the housing 1, namely, a plurality of (usually less than ten) filter plates 6 which are arranged in series are divided into one group corresponding to each section of the fluid guiding cavities 3, each filter plate group is communicated with the corresponding fluid guiding cavity 3 by the fluid ports 8 on each filter plate 6, namely, the fluid guiding cavities 3 connect the corresponding matched filter plates 6 together in series through the fluid ports 8, and thus, all the filter plates 6 in the thickener are divided into a plurality of filter plate groups corresponding to each section of the fluid guiding cavities 3.
A plurality of downwardly extending hoppers 9 are connected to the bottom of the housing 1, the number and positions of the hoppers 9 corresponding to the number and positions of the filter plate groups separated in the housing 1. Specifically, the bin hoppers 9 connected to the bottom of the casing 1 are divided into a plurality of sections corresponding to the fluid guiding cavities 3 on the casing 1, each bin hopper 9 is located below the corresponding fluid guiding cavity 3, and the opening and closing of the discharge valve of each bin hopper 9 can be controlled independently.
The feed pipe 2 serves to feed slurry to be concentrated into the housing 1, and the slurry introduced into the housing 1 is soaked outside each filter plate 6 in the housing 1. The slurry is subjected to solid-liquid separation under the action of pressure by each filter plate 6, the separated filtrate enters the filter cavity of the filter plate 6 and enters the corresponding fluid guide cavity 3 through the fluid port 8, and the separated filter residues are adhered to the surfaces of the filter membrane/filter cloth of the filter plate 6 and part of the filter residues can be automatically precipitated due to gravity.
The liquid discharge pipe 10 is connected with the liquid outlet pipe joint 5 connected with each section of the fluid guiding cavity 3 on the shell 1, namely the liquid outlet pipe joint 5 with a control valve on each section of the fluid guiding cavity 3 can be connected with the liquid discharge pipe 10, and filtrate in each section of the fluid guiding cavity 3 enters the liquid discharge pipe 10 through the liquid outlet pipe joint 5.
The backflushing pipe 7 is connected with the backflushing pipe joint 4 connected with each section of fluid guiding cavity 3 on the shell 1, namely the backflushing pipe joint 4 with a control valve on each section of fluid guiding cavity 3 can be connected with the backflushing pipe 7, and backflushing medium (usually compressed air, of course, high-pressure water or air-water mixture) of the backflushing pipe 7 enters the corresponding fluid guiding cavity 3 through the corresponding backflushing pipe joint 4 on each section of fluid guiding cavity 3.
The operation control process of the high-efficiency thickener comprises the following steps:
Starting the feed pipe 2 to continuously feed into the shell 1, and carrying out solid-liquid separation on the slurry in the shell 1 through each filter plate 6 under the action of pressure; the separated filtrate enters a liquid discharge pipe 10 through a filter cavity, a fluid port 8 and a corresponding fluid guide cavity 3 on the filter plate 6 and is discharged out of the shell 1, part of separated solids automatically deposit in the shell 1 and enter a corresponding bin 9, and the other part of solids are adhered to the filter plate 6;
When the accumulated filter cake on a certain filter plate group reaches a certain thickness to affect the solid-liquid separation function of the filter plate 6, the liquid outlet control valve of the current filter plate group is closed, the backflushing control valve of the current filter plate group is opened, backflushing medium of the backflushing pipe 7 enters the filter cavity of the corresponding filter plate 6 through the corresponding fluid guide cavity 3 and each fluid port 8, the filter plate 6 is backflushed, the filter cake adhered on the surface of the filter plate 6 is stripped and falls into the corresponding bin 9, and the backflushing medium is discharged out of the shell 1 through the other filter plate groups which are currently in solid-liquid separation;
the corresponding hopper 9 is opened according to the requirement of the concentration of the slurry, so as to realize the unloading.
Example 2
Other contents of this embodiment are the same as embodiment 1, except that: the multi-section fluid guiding cavities on the shell are distributed outside the shell, and the fluid ports of the filter plates matched with the fluid guiding cavities extend out of the shell respectively to be communicated with the corresponding fluid guiding cavities.
Example 3
The invention relates to a high-efficiency operation control method of a thickener, which is realized based on the structural change of the thickener, and adopts the following technological measures:
dividing all filter plates in the thickener into groups of a plurality (typically ten or less) of filter plates arranged consecutively in the thickener, such that all filter plates in the thickener are divided into a plurality of filter plate groups; correspondingly, the bin hoppers at the bottom of the thickener are divided into a plurality of bins according to the grouping of the filter plates, so that each bin hopper is positioned below the corresponding filter plate group, and the opening and closing of each bin hopper can be independently controlled;
-each filter panel set has connected thereto a backflushing system and a drainage system capable of independent control, and the backflushing system and the drainage system of each filter panel set are controlled to remain interlocked; that is, the control of the backflushing systems of the filter plate groups is independent of each other, and the control of the drain systems of the filter plate groups is also independent of each other, but the control of the backflushing systems and the drain systems of the same filter plate group is required to be kept in an interlocking state;
-during the continuous feeding of the thickener, each filter plate group is drained of filtrate through a respective drain system; when filter cakes are respectively formed by stacking the filter plate groups, the filter cake stripping is respectively carried out on the filter plate groups through respective backflushing systems according to different front and back sequences, that is, the backflushing action of the filter plate groups in the thickener cannot be carried out simultaneously.
The efficient operation control method of the thickener is converted into the structural design of the thickener, so that the efficient thickener of the invention can be formed.
The high-efficiency thickener comprises a shell, and a feed pipe, a liquid discharge pipe and a backwash pipe which are arranged on the shell.
Wherein, the casing is placed on the frame horizontally. A plurality of filter plates are sequentially arranged in the shell along the length direction. Each filter plate mainly comprises a plate frame, rib plates fixed on at least one side (usually two sides) of the plate frame, and a filtering membrane/filtering cloth coated on the rib plates, wherein the plate frame and the rib plates form a filtering cavity capable of discharging filtrate, a plurality of filtrate channels communicated with the filtering cavity are formed in the rib plates, and each filter plate is of a hollow structure with the filtering cavity; in addition, the top of the plate frame of each filter plate is provided with a fluid port for flowing filtrate or backflushing medium. All the filter plates in the shell are divided into a plurality of groups, each group is composed of a plurality of (usually less than ten) filter plates which are arranged continuously, so that all the filter plates in the thickener are divided into a plurality of filter plate groups; the filter plates of each filter plate group are connected with a liquid outlet pipe joint and a backflushing pipe joint which can extend out of the shell through respective fluid ports, the liquid outlet pipe joint of each filter plate group is respectively provided with a control valve, the control valves of the liquid outlet pipe joints of each filter plate group can be synchronously controlled, the backflushing pipe joints of each filter plate group are also respectively provided with a control valve, and the control valves of the backflushing pipe joints of each filter plate group can be synchronously controlled, but the control valves of the backflushing pipe joints connected with the same filter plate group and the liquid outlet pipe joints are required to be in an interlocking state, namely, when the backflushing pipe joints of the same filter plate group are conducted, the liquid outlet pipe joints are closed, otherwise, when the liquid outlet pipe joints of the same filter plate group are conducted, the backflushing pipe joints are closed.
The bottom of the shell is connected with a plurality of downward-extending bin hoppers, and the number and the positions of the bin hoppers correspond to those of the filter plate groups separated from the shell. Specifically, the bin hopper that the casing bottom is connected corresponds each filter group on the above-mentioned casing and divide into a plurality ofly, and every bin hopper is located the below that corresponds the filter group, and the unloading valve of every bin hopper opens, closes can independent control.
The feed pipe serves to feed slurry to be concentrated into the housing, and the slurry introduced into the housing is soaked outside each filter plate in the housing. And (3) carrying out solid-liquid separation on the slurry by each filter plate under the action of pressure, wherein the separated filtrate enters a filter cavity of the filter plate and enters a corresponding liquid outlet pipe joint through a fluid port, and the separated filter residues are adhered to the surfaces of a filter membrane/filter cloth of the filter plate and part of the filter residues can be automatically precipitated due to gravity.
The liquid discharge pipe is communicated with the liquid outlet pipe joints connected with the filter plate groups on the shell, namely the liquid outlet pipe joints with the control valves on the filter plate groups can be communicated with the liquid discharge pipe, and filtrate separated from the filter plate groups enters the liquid discharge pipe through the liquid outlet pipe joints.
The back flushing pipe is connected with the back flushing pipe joint connected with each filter plate group on the shell, namely the back flushing pipe joint with the control valve on each filter plate group can be connected with the back flushing pipe, and the back flushing medium (usually compressed air, of course, high-pressure water or air-water mixture) of the back flushing pipe enters the corresponding filter plate group through a plurality of corresponding back flushing pipe joints on each filter plate group.
The operation control process of the high-efficiency thickener comprises the following steps:
Starting a feed pipe to continuously feed into the shell, and separating solid from liquid of slurry in the shell through each filter plate under the action of pressure; the separated filtrate enters the liquid discharge pipe and is discharged out of the shell through the filter cavity, the fluid port and the corresponding liquid outlet pipe joint on the filter plate, part of separated solids automatically deposit in the shell and enter the corresponding bin hopper, and the other part of solids adhere to the filter plate;
When the accumulated filter cakes on a certain filter plate group reach a certain thickness to influence the solid-liquid separation function of the filter plates, the liquid outlet control valve of the current filter plate group is closed, the backflushing control valve of the current filter plate group is opened, backflushing medium from a backflushing pipe enters the filter cavity of the corresponding filter plate through the corresponding backflushing pipe joint and the fluid port, backflushing the filter plates, so that filter cakes adhered to the surfaces of the filter plates are stripped and fall into the corresponding bin hoppers, and the backflushing medium is discharged out of the shell through other filter plate groups which are currently in solid-liquid separation;
-opening the corresponding hopper according to the demand for the concentrate of the slurry, effecting the discharge.
Example 4
Other contents of this embodiment are the same as those of embodiment 1,2 or 3, except that: the bin hopper at the bottom of the shell is one, and the bin hopper is correspondingly arranged below each filter plate group.
Example 5
Other contents of this embodiment are the same as those of embodiment 1,2 or 3, except that: the bin hopper at the bottom of the shell is a plurality of, and each bin hopper corresponds to the lower part of two adjacent filter plate groups in the shell.
The above examples are only for illustrating the invention and are not to be construed as limiting the invention; although the invention has been described in detail with reference to the above embodiments, it will be understood by those of ordinary skill in the art that: the invention may be modified or substituted for some of the features of the embodiments described above without departing from the spirit and scope of the invention.
Claims (7)
1. The efficient operation control method for the thickener is characterized in that the operation control method adopts the following technological measures:
A plurality of sections of mutually independent fluid guide cavities are arranged in a shell of the thickener, and a plurality of continuously arranged filter plates are divided into a group corresponding to each section of fluid guide cavity in the shell, so that all the filter plates in the thickener are divided into a plurality of groups;
each filter plate group is provided with a backflushing system and a liquid discharging system which can be controlled independently through a corresponding fluid guide cavity, and the backflushing system and the liquid discharging system of each filter plate group are controlled to be kept in an interlocking state;
in the continuous feeding process of the thickener, each filter plate group discharges filtrate through a respective liquid discharge system, each filter plate group is stripped by a respective backflushing system, and each filter plate group in the thickener cannot perform backflushing action at the same time.
2. The efficient operation control method of the thickener according to claim 1, wherein: the bin hopper at the bottom of the thickener is divided into a plurality of bins according to the grouping of the filter plates, and each bin hopper is positioned below the corresponding filter plate group.
3. The utility model provides a high-efficient thickener, includes casing (1) and inlet pipe (2), a plurality of filter (6) have been arranged in order in casing (1), and every filter (6) are the hollow structure that has the filter chamber, and the filter chamber of every filter (6) has fluid port (8), inlet pipe (2) are used for will waiting concentrated thick liquids to send into in casing (1) and be in the outside of filter (6), its characterized in that:
The device is characterized in that a plurality of sections of mutually independent fluid guide cavities (3) are formed in the shell (1), all filter plates (6) in the shell (1) correspond to each section of fluid guide cavity (3) in the shell (1) and are divided into a plurality of groups, each filter plate group is communicated with the corresponding fluid guide cavity (3) through a fluid port (8) in each filter plate (6), a liquid outlet pipe joint (5) capable of being connected with a liquid discharge pipe (10) and provided with a control valve and a backflushing pipe joint (4) capable of being connected with a backflushing pipe (7) and provided with a control valve are arranged on each section of fluid guide cavity (3), the backflushing pipe (7) and the liquid discharge pipe (10) connected with each filter plate group can be controlled independently, and the control valves of the backflushing pipe joint (4) and the liquid outlet pipe joint (5) connected with each section of fluid guide cavity (3) are in an interlocking state.
4. A high efficiency thickener according to claim 3, wherein: the efficient thickener also comprises a liquid discharge pipe (10), wherein the liquid discharge pipe (10) is communicated with a liquid outlet pipe joint (5) connected with each section of fluid guide cavity (3) on the shell (1).
5. A high efficiency thickener according to claim 3, wherein: the efficient thickener also comprises a backflushing pipe (7), wherein the backflushing pipe (7) is communicated with the backflushing pipe joint (4) connected with each section of fluid guide cavity (3) on the shell (1).
6. A high efficiency thickener according to claim 3, wherein: the bottom of the shell (1) is connected with a bin hopper (9) which extends downwards.
7. The high efficiency thickener of claim 6, wherein: the bin hopper (9) connected with the bottom of the shell (1) is divided into a plurality of parts corresponding to each section of fluid guide cavity (3) on the shell (1), and each bin hopper (9) is positioned below the corresponding fluid guide cavity (3).
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