CN117357932B

CN117357932B - Filtration system and filtration method

Info

Publication number: CN117357932B
Application number: CN202311680249.7A
Authority: CN
Inventors: 柯树; 陈志恒
Original assignee: Zhongji Anruichun Technology Co ltd
Current assignee: Zhongji Anruichun Technology Co ltd
Priority date: 2023-12-08
Filing date: 2023-12-08
Publication date: 2024-04-19
Anticipated expiration: 2043-12-08
Also published as: CN117357932A

Abstract

The invention provides a filtering system and a filtering method. The filtering system comprises a feeding main pipe, a conveying pump, a filtering component and a discharging main pipe. The filtering component is used for receiving liquid to be filtered and filtering, and comprises a plurality of filters; at least one filter is used as a standby filter, at least two filters are used as working filters, a plurality of working filters are arranged in series, the adsorption capacity of the working filters is gradually increased from upstream to downstream, the adsorption capacity of the standby filter is greater than or equal to that of the working filters, and when the working filter at the front end stops filtering, the standby filter starts to work and is connected in series with the tail ends of all the working filters. Through the switching of the standby filter, the continuous filtration of the filter system is ensured, and the filtration efficiency is improved. Meanwhile, the removal rate of the liquid to be filtered is balanced, and the quality stability of the filtered liquid is guaranteed.

Description

Filtration system and filtration method

Technical Field

The invention relates to the technical field of filtration, in particular to a filtration system and a filtration method.

Background

The newly brewed wine has violent taste, hot and spicy taste and heavy bran impurity taste, and sometimes has the peculiar smell of new wine, wherein the activated carbon can effectively remove macromolecular substances in the new wine by adsorption, and the activated carbon can quickly absorb plasticizer residues, ageing, turbidity removal and peculiar smell removal, so that the wine is more fragrant and mellow. The new taste of the treated wine disappears, the wine body is soft, clean and refreshing, the high-alcohol wine can be arbitrarily pulped to reduce alcohol content, and the wine is not turbid at low temperature.

The current common activated carbon filtration mode is as follows: the activated carbon is arranged in a large container, and the materials pass through the container, so that impurities in the wine are removed by utilizing the adsorption capacity of the activated carbon. When the filtration starts, the activated carbon has strong filtering adsorption capacity to materials, and more removed matters are in the wine, as the filtration continues, the adsorption impurities in the micropores of the activated carbon are increased, the adsorption capacity is attenuated, the removal rate of the activated carbon adsorption is reduced, and when the adsorption capacity is attenuated to be incapable of meeting the removal requirement for a certain time, the activated carbon needs to be replaced again. And (5) repeatedly filtering after the active carbon is replaced, and repeating the steps in sequence. Therefore, in the above-described activated carbon filtration method, continuous filtration is not possible, resulting in low filtration efficiency.

Disclosure of Invention

The invention aims to provide a filtering system and a filtering method capable of continuously filtering so as to solve the problems in the prior art.

In order to solve the above technical problems, the present invention provides a filtration system, including:

A feed header for delivering a liquid to be filtered;

A transfer pump disposed on the feed header;

A filter assembly for receiving a liquid to be filtered and filtering, the filter assembly comprising a plurality of filters;

a discharge manifold disposed downstream of the filter assembly for delivering filtered liquid outwardly;

at least one filter is used as a standby filter, at least two filters are used as working filters, at least two working filters are arranged in series, the adsorption capacity of at least two working filters is gradually increased from upstream to downstream, the adsorption capacity of the standby filter is larger than or equal to that of the working filters, and when the working filter at the front end stops filtering, the standby filter starts to work and is connected in series with the tail ends of all the working filters.

In one embodiment, the difference in adsorption capacity between any two adjacent working filters in the upstream-to-downstream direction is equal to the difference in adsorption capacity between the end working filter and the spare filter.

In one embodiment, an inlet and an outlet are formed in each filter, and the filter assembly includes a first feeding branch pipe and a second feeding branch pipe which are arranged corresponding to the inlet of each filter, and a first discharging branch pipe and a second discharging branch pipe which are arranged corresponding to the outlet of each filter; each first feeding branch pipe is connected with the feeding main pipe, each first feeding branch pipe is provided with a first feeding valve, each second feeding branch pipe is provided with a second feeding valve, each first discharging branch pipe is connected with the adjacent second feeding branch pipe to enable a plurality of filters to be connected end to end in sequence, each first discharging branch pipe is provided with a first discharging valve, and each second discharging branch pipe is provided with a second discharging valve;

The first feed valve, the second feed valve, the first discharge valve and the second discharge valve of the standby filter are closed, the first feed valve and the first discharge valve of the working filter at the front end are opened, the second feed valve and the second discharge valve are closed, the first feed valve and the first discharge valve of the working filter at the tail end are closed, the second feed valve and the second discharge valve are opened, and when the working filter at the front end stops filtering, the standby filter starts to work and is connected in series with the tail ends of all the working filters.

In one embodiment, the working filter comprises at least three filters, the first feed valve and the second discharge valve of the middle working filter are closed, and the second feed valve and the first discharge valve are opened.

In one embodiment, when the real-time filtering amount of the working filter at the front end reaches a critical point, the filter stops the filtering operation, and the standby filter is switched to perform the filtering operation.

In one embodiment, a detector is disposed downstream of the delivery pump, and the detector is disposed on the feeding manifold to detect a real-time flow and a real-time total filtration amount, where each filter has a preset maximum filtration value, the preset maximum filtration value is obtained according to the total filtration amount of the filter, and the preset maximum filtration value is not greater than the total filtration amount of the filter, and when the total real-time filtration amount of the filter reaches the preset maximum filtration value, the filter reaches a critical point.

In one embodiment, the filtering system includes a controller, the controller is electrically connected to the first feed valves, the second feed valves, the first discharge valves and the second discharge valves simultaneously, the controller is electrically connected to the detector to receive the detected signals, the controller is electrically connected to the transfer pump to control the on/off of the transfer pump, and the controller also controls the frequency of the transfer pump.

In one embodiment, the filter comprises:

A housing having an accommodating space therein and having an opening at a top;

the top cover is detachably arranged at the top of the shell;

the filter boxes are arranged in the accommodating space at vertical intervals, and each filter box is internally provided with an adsorbent for adsorption filtration; the top and the bottom of each filter box are provided with a plurality of through holes for liquid to pass through;

wherein, when the real-time filtration volume of the filter reaches a critical point, the filter box can be replaced.

In one embodiment, the filter comprises a central tube erected in the shell and a plurality of supporting pieces sleeved on the periphery of the central tube along a vertical interval, the central tube extends downwards out of the shell, the bottom of the central tube forms an outlet of the filter, the periphery of the central tube is provided with a liquid inlet, the liquid inlet is positioned at the lower part of the shell, a plurality of filter boxes are sleeved on the periphery of the central tube, the supporting pieces are arranged in one-to-one correspondence with the filter boxes, and each supporting piece is used for supporting the corresponding filter box;

wherein, liquid flows to the outlet through the liquid inlet after being filtered by a plurality of filter boxes.

In one embodiment, each supporting piece comprises a supporting cylinder, an upper positioning table and a lower positioning table which are respectively arranged at two ends of the supporting cylinder, an upper positioning hole is formed in the middle of the upper positioning table, a lower positioning hole is formed in the middle of the lower positioning table, the filter box comprises a box body and an upper pore plate and a lower pore plate which are respectively arranged at the top of the box body, an upper through hole is formed in the middle of the upper pore plate, the inner periphery of the upper through hole extends downwards to form an upper boss, a lower through hole is formed in the middle of the lower pore plate, the inner periphery of the lower through hole extends upwards to form a lower boss, the upper boss is positioned in the upper positioning hole, and the lower boss is positioned in the lower positioning hole.

In one embodiment, the filter further comprises a plurality of spacers sleeved on the outer periphery of the central tube and arranged at intervals in the vertical direction, each spacer is located between two adjacent filter boxes, each spacer comprises a spacer tube and a plurality of limiting blocks circumferentially arranged at intervals on the inner periphery of the spacer tube, each limiting block extends in the radial direction, and when the spacer tube is sleeved on the outer periphery of the central tube, the inner periphery of each limiting block is close to the outer periphery of the central tube.

In one embodiment, the filter further comprises a locking member, wherein the locking member is sleeved on the periphery of the central tube and is located above the top filter box and used for locking the filter box and the central tube.

In one embodiment, the outer periphery of the filter box is provided with an upper connecting seat and a lower connecting seat in a protruding manner, the upper connecting seat and the lower connecting seat are respectively arranged at the top and the bottom of the filter box, an upper connecting hole is formed in the upper connecting seat, a lower connecting hole is formed in the lower connecting seat, and a fastener penetrates through the upper connecting hole and the lower connecting hole simultaneously to realize connection between the adjacent filter boxes.

In one embodiment, each filter is provided with an outflow port, the filtering system comprises an air inlet manifold for air inlet and a return manifold for return flow, the air inlet manifold is simultaneously communicated with the inlets of a plurality of filters, the return manifold is simultaneously communicated with a plurality of outflow ports, when one filter stops filtering, the air inlet manifold is communicated with the inlet of the filter and injects gas into the filter, and the outflow port of the filter is communicated with the return manifold so as to return liquid in the filter.

In one embodiment, the filtration system further comprises a buffer tank for accommodating the liquid to be filtered, the buffer tank comprises a liquid inlet and a liquid outlet, the liquid inlet is connected with the feeding main pipe through a first connecting pipeline, the liquid outlet is connected with the feeding main pipe through a second connecting pipeline, the second connecting pipeline is located at the upstream of the conveying pump and at the downstream of the first connecting pipeline, a first control valve is arranged on the first connecting pipeline, a second control valve is arranged on the second connecting pipeline, a third control valve is arranged on the feeding main pipe, and the third control valve is arranged between the first connecting pipeline and the second connecting pipeline.

In one embodiment, a first liquid level detector and a second liquid level detector are arranged on the buffer tank at vertical intervals, the first liquid level detector is positioned above the second liquid level detector, the first liquid level detector is used for detecting the high liquid level in the buffer tank, and the second liquid level detector is used for detecting the low liquid level in the buffer tank;

When the liquid level in the buffer tank reaches a high liquid level, the first control valve is closed, and when the liquid level in the buffer tank is reduced to a low liquid level, the second control valve is closed.

In one embodiment, the buffer tank is provided with a cleaning inlet and a sewage outlet, the cleaning inlet is connected with a cleaning water inlet pipe, and the sewage outlet is connected with a sewage pipe;

And each filter is provided with an exhaust port, and a plurality of exhaust ports are communicated with the buffer tank.

In one embodiment, the filtering system further comprises a fine filter arranged at the downstream of the filtering component, wherein the fine filter is connected with the discharging main pipe and is used for receiving the liquid filtered by the filtering component, carrying out fine filtration and then conveying the liquid to the discharging main pipe.

In one embodiment, the inlet of the fine filter is connected with the discharging main pipe through an input pipeline, the outlet of the fine filter is connected with the discharging main pipe through an output pipeline, the input pipeline is arranged at the upstream of the output pipeline, a first valve is arranged on the input pipeline, a second valve is arranged on the output pipeline, a third valve is arranged on the discharging main pipe, and the third valve is arranged between the input pipeline and the output pipeline.

In one embodiment, the filtering system comprises a cleaning assembly, the cleaning assembly comprises a water inlet main pipe, a plurality of water inlet branch pipes and a plurality of water outlet branch pipes, the water inlet branch pipes and the inlets of the filters are arranged in one-to-one correspondence, the water outlet branch pipes and the outlets of the filters are arranged in one-to-one correspondence, and the other ends of the water outlet branch pipes are communicated with the outside.

In one embodiment, the cleaning assembly further comprises a gas feed line in communication with the feed manifold, the gas feed line being disposed upstream of the transfer pump to inject gas into each line downstream.

The invention also provides a filtering method, which comprises the following steps:

Providing a plurality of filters, enabling at least one filter to be a standby filter, enabling at least two filters to be working filters, and enabling the working filters to be connected in series;

Pumping liquid to be filtered, and enabling the liquid to be filtered to sequentially pass through a plurality of working filters; wherein the adsorption capacities of a plurality of the working filters are gradually increased from upstream to downstream;

When the real-time filtering quantity of the working filter at the front end reaches a critical point, the working filter is controlled to stop filtering, and the standby filter is controlled to be connected in series downstream of all the working filters for filtering.

In one embodiment, the step of gradually increasing the adsorption capacities of the plurality of working filters from upstream to downstream includes:

leading the liquid to be filtered into one of the filters for filtering, wherein the filter is defined as a working filter at the front end;

When the real-time filtering quantity of the working filters at the front end reaches the preset value of the mth flow, starting the (m+1) th filter, and connecting the filters in series with the downstream of all the working filters; the m-th flow preset value is m x (the preset maximum filtering value of the working filter at the front end/the number of all the working filters n-1), n is more than or equal to 2, m is more than or equal to 1, n is more than or equal to m, and m and n are natural numbers;

the adsorption capacity of all working filters is gradually increased from upstream to downstream by gradually switching in the filters.

According to the technical scheme, the invention has the advantages and positive effects that:

The filtering system ensures that the filtering system can continuously filter and improves the filtering efficiency through switching the standby filter. Meanwhile, the removal rate of the liquid to be filtered is balanced, and the quality stability of the filtered liquid is guaranteed.

Further, the filters are serially connected for filtering, so that the flow rate of the liquid to be filtered is always kept the same, namely the time of the liquid to be filtered passing through the filters is the same, so that the contact time of the liquid to be filtered and the adsorbent is the same, the removal rate of the liquid to be filtered is ensured to be consistent, and the quality stability of the liquid after filtration is ensured.

Drawings

FIG. 1 is a schematic diagram of one embodiment of a filtration system of the present invention.

FIG. 2 is a schematic diagram of one embodiment of a filter according to the present invention.

Fig. 3 is a schematic view of one embodiment of a filter cartridge of the present invention.

Fig. 4 is a schematic view of one embodiment of a filter cartridge with a bottom end according to the present invention.

FIG. 5 is a partial schematic view of one embodiment of a filter of the present invention.

Fig. 6 is a schematic view of one embodiment of the support member of the present invention.

FIG. 7 is a schematic view of one embodiment of a spacer of the present invention.

Fig. 8 is a top view of one embodiment of a spacer of the present invention.

The reference numerals are explained as follows:

1. A feed header; 2. a transfer pump; 31. a filter; 311. a housing; 312. a top cover; 313. a filter box; 3131. a case body; 3132. an upper cover; 3133. a lower cover; 3134. an upper boss; 3135. a lower boss; 3136. a silk screen is arranged; 3137. a support net; 3138. a lower silk screen; 3139. a filter screen; 314. a central tube; 315. a support; 3151. a support cylinder; 3152. an upper positioning table; 3153. a lower positioning table; 316. a spacer; 3161. a spacer; 3162. a limiting block; 317. a locking member;

32. A first feed leg; 33. a second feed leg; 34. a first discharge branch; 35. a second discharge branch; 36. a first feed valve; 37. a second feed valve; 38. a first discharge valve; 39. a second discharge valve; 4. a discharging main pipe; 5. a detector; 61. an intake manifold; 62. an air inlet branch pipe; 63. an intake valve; 64. a return header; 65. a return branch pipe; 66. a return valve; 7. a buffer tank; 71. a first connecting line; 72. a second connecting pipeline; 73. a first liquid level detector; 74. a second liquid level detector; 75. cleaning the tube; 8. a fine filter; 81. an input pipeline; 82. an output line; 91. a water inlet main pipe; 92. and an air supply pipeline.

Detailed Description

While this invention is susceptible of embodiment in different forms, there is shown in the drawings and will herein be described in detail, specific embodiments thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to that as illustrated.

Thus, rather than implying that each embodiment of the present invention must have the characteristics described, one of the characteristics indicated in this specification will be used to describe one embodiment of the present invention. Furthermore, it should be noted that the present specification describes a number of features. Although certain features may be combined together to illustrate a possible system design, such features may be used in other combinations not explicitly described. Thus, unless otherwise indicated, the illustrated combinations are not intended to be limiting.

In the embodiments shown in the drawings, indications of orientation (such as up, down, left, right, front and rear) are used to explain the structure and movement of the various elements of the invention are not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the description of the position of these elements changes, the indication of these directions changes accordingly.

The invention provides a filtering system for filtering impurities in a liquid. For example, distillers grains, proteins, yeast, off-flavor-producing organics, and other impurities remaining in the white spirit are filtered. The filtering system can continuously filter and ensure that the removal rate of the white spirit in the filtering process is relatively balanced, so that the quality balance of the filtered white spirit is ensured.

Fig. 1 shows a schematic view of a filtration system according to the present embodiment, and referring to fig. 1, the filtration system includes a feed manifold 1, a transfer pump 2, a filter assembly, and a discharge manifold 4.

The feed header 1 is used for transporting the liquid to be filtered. That is, the feed header 1 is adapted to communicate with the outside world to receive the liquid to be filtered and to deliver the liquid to be filtered into the filter assembly.

A transfer pump 2 is provided on the feed manifold 1 for providing the motive force for transferring the liquid. Specifically, the transfer pump 2 is a variable frequency pump.

The discharging main pipe 4 is used for conveying the liquid filtered by the filtering assembly outwards.

The filter assembly is used for receiving liquid to be filtered and filtering. The filter assembly comprises a plurality of filters 31. At least one filter 31 is used as a standby filter, at least two filters 31 are used as working filters, a plurality of working filters are arranged in series, the adsorption capacity of the working filters is gradually increased from upstream to downstream, the adsorption capacity of the standby filter is larger than or equal to that of the working filters, and when the working filter at the front end stops filtering, the standby filter starts to work and is connected in series with the tail ends of all the working filters. By switching the standby filter, the continuous filtration of the filtration system is ensured.

In the present application, the working filter at the front end refers to the filter 31 close to the transfer pump 2, and the liquid pumped by the transfer pump 2 enters the working filter at the front end first. The working filter at the end is referred to as the filter 31 close to the discharge manifold 4, i.e. the liquid output by the working filter at the end enters the discharge manifold 4. Adsorption capacity refers to the amount of filtration that a filter is capable of filtering a liquid.

Each filter 31 is provided with an inlet and an outlet. Specifically, the inlet of each filter 31 is provided at the top, and the outlet is provided at the bottom. The filter assembly comprises a first feed leg 32 and a second feed leg 33, which are arranged in correspondence with the inlet of each filter 31, and a first discharge leg 34 and a second discharge leg 35, which are arranged in correspondence with the outlet of each filter 31.

The first feed branch 32 and the second feed branch 33 are arranged in parallel, each first feed branch 32 being connected to the feed header 1, i.e. each first feed branch 32 is located between the feed header 1 and the inlet. And each first feed branch pipe 32 is provided with a first feed valve 36, and each second feed branch pipe 33 is provided with a second feed valve 37. In this embodiment, the first feed valve 36 and the second feed valve 37 are each pneumatic butterfly valves.

Preferably, a pressure sensor is provided on the second feed leg 33 for detecting the real-time pressure on the second feed leg 33. The second feed leg 33 is provided with a pressure display for displaying the pressure.

The first outlet branch 34 is connected to an adjacent second inlet branch 33 to connect the plurality of filters 31 end to end in sequence. For example, when the number of filters 31 is n, n.gtoreq.3, the numbers of the filters 31 are 1,2,3, … …, n-1, n, the first discharge branch 34 of the filter No. 1 31 is connected to the second feed branch 33 of the filter No. 2 31, the first discharge branch 34 of the filter No. 2 31 is connected to the second feed branch 33 of the filter No. 331, … …, the first discharge branch 34 of the filter No. n-1 is connected to the second feed branch 33 of the filter No. 1, and the first discharge branch 34 of the filter No. 31 is connected to the second feed branch 33 of the filter No. 1, so that the filters 31 are connected end to end.

The second outlet branch pipes 35 are all connected with the outlet main pipe 4, that is, the outlet main pipe 4 is connected with a plurality of second outlet branch pipes 35, so that each filter 31 can be used as the tail end of the filtering assembly and the filtered liquid is conveyed to the outlet main pipe 4.

A first discharge valve 38 is provided on each first discharge branch 34, and a second discharge valve 39 is provided on each second discharge branch 35. In this embodiment, the first discharge valve 38 and the second discharge valve 39 are pneumatic butterfly valves.

The specific way of realizing continuous filtration by the filtration system is as follows:

The first feed valve 36, the second feed valve 37, the first discharge valve 38 and the second discharge valve 39 of the spare filter are closed, the first feed valve 36 and the first discharge valve 38 of the working filter at the front end are opened, the second feed valve 37 and the second discharge valve 39 are closed, the first feed valve 36 and the first discharge valve 38 of the working filter at the end are closed, the second feed valve 37 and the second discharge valve 39 are opened, and when the working filter at the front end stops filtering, the spare filter starts to work and is connected in series with the ends of all the working filters.

Preferably, the working filter comprises at least three filters, wherein the first feed valve 36 and the second discharge valve 39 of the middle working filter are closed and the second feed valve 37 and the first discharge valve 38 are opened. The middle working filter means a working filter between the working filter at the front end and the working filter at the end.

In this embodiment, the number of the filters 31 is five, and is No. 1 filter, no. 2 filter, no. 3 filter, no. 4 filter and No. 5 filter respectively, no. 1 filter, no. 2 filter, no. 3 filter and No. 4 filter are working filters, no. 5 filter is spare filter, wherein, no. 1 filter sets up in the low reaches of delivery pump 2, no. 2 filter sets up in the low reaches of No. 1 filter, no. 3 filter sets up in the low reaches of No. 2 filter, no. 4 filter sets up in the low reaches of No. 3 filter, i.e. No. 1 filter, no. 2 filter, no. 3 filter and No. 4 filter are established ties in proper order. The filter No. 1 is a working filter positioned at the front end, the filter No. 2 and the filter No. 3 are working filters positioned in the middle, and the filter No. 4 is a working filter positioned at the tail end. At this time, the first feed valve 36 and the first discharge valve 38 of the filter No. 1 are opened, the second feed valve 37 and the second discharge valve 39 are closed, the first feed valve 36 and the second discharge valve 39 of the filter No. 2 and the filter No. 3 are closed, the second feed valve 37 and the first discharge valve 38 are opened, the first feed valve 36 and the first discharge valve 38 of the filter No. 4 are closed, and the second feed valve 37 and the second discharge valve 39 are opened. That is, the liquid to be filtered sequentially enters a No. 1 filter, a No. 2 filter, a No. 3 filter and a No. 4 filter, and finally enters the discharging main pipe 4 through the No. 4 filter.

In other embodiments, the number of filters may be 3,4, or other numbers, specifically set according to capacity or user requirements.

When the real-time filtering amount of the filter 31 reaches the critical point, the filter 31 stops the filtering operation and switches the standby filter to perform the filtering operation.

Illustratively, in the present embodiment, it is assumed that when the filter No. 1 stops the filtering operation, the filter No. 5 starts the operation and is connected in series to the ends of all the operation filters, that is, the filter No. 2, the filter No. 3, the filter No. 4, and the filter No. 5 are the operation filters, and are sequentially connected in series in order, and the filter No. 2 is provided downstream of the transfer pump 2. At this time, the filter No. 1 is a spare filter, and the filter cartridge 313 in the filter No. 1 may be replaced to be used as a working filter next.

The arrival of the real-time filtering amount of the filter 31 at the critical point can be judged in the following manner.

Specifically, a detector 5 is disposed at the downstream of the delivery pump 2, the detector 5 is disposed on the feed manifold 1 to detect the real-time flow and the real-time filtering amount, each filter has a preset maximum filtering value, the preset maximum filtering value is obtained according to the total filtering amount of the filter, the preset maximum filtering value is not greater than the total filtering amount of the filter, and when the real-time filtering amount of the filter reaches the preset maximum filtering value, the filter reaches a critical point.

For example, assuming a total filtration amount of 200 tons for the filter, the preset maximum filtration value is 200 tons, 190 tons or 180 tons. And may be set according to the actual situation.

Further, in the upstream-to-downstream direction, the difference in adsorption capacity between any two adjacent working filters and the difference in adsorption capacity between the working filter and the spare filter at the end are equal. By adopting the design, the filtering quantity of all the liquid to be filtered in the process of passing through the filtering component can be kept the same, the balance of the removal rate is ensured, and the quality stability of the filtered liquid is ensured.

The filtration system includes a controller electrically connected to a plurality of first feed valves 36, a plurality of second feed valves 37, a plurality of first discharge valves 38, and a plurality of second discharge valves 39 simultaneously, the controller being configured to control the opening and closing of the above-described valves.

The controller is electrically connected with the detector 5 to receive the detected signal, and is electrically connected with the delivery pump 2 to control the on-off of the delivery pump 2. The controller also controls the frequency of the transfer pump 2.

That is, the controller outputs a control signal based on the signal detected by the detector 5, and sequentially stops the filters 31 to enable replacement. The control signal includes the opening and closing of the valves and the frequency of the transfer pump 2.

Further, an alarm is further provided on each filter 31, and the alarm is electrically connected to the controller. When the controller receives that the real-time filtering amount of one filter 31 reaches the critical point, the controller also controls the alarm corresponding to the filter 31 to send out an alarm signal.

Wherein the filter 31 includes a housing 311, a top cap 312, and a plurality of filter cartridges 313. The housing 311 is detachably connected with the top cover 312 to realize the replacement of the filter cartridge 313. That is, when the filter is stopped, the filter cartridge 313 is replaced to update the filtration amount of the filter 31, and then the filter cartridge is ready for use as a spare filter.

Specifically, the housing 311 has an accommodating space therein and an open top. In the present embodiment, the axial direction of the housing 311 extends vertically. The cross section of the housing 311 is circular. In other embodiments, the cross-section of the housing 311 may also be polygonal.

The bottom of the housing 311 is provided with an outflow opening.

The top cover 312 is detachably arranged at the opening of the shell 311. Specifically, the outer periphery of the top cover 312 is provided with a first boss in an outward protruding manner, and the first boss is provided with a first bolt hole. The periphery at the top of the shell 311 is outwards provided with a second boss in a protruding mode, and a second bolt hole is formed in the second boss. The fastener is simultaneously penetrated in the first bolt hole and the second bolt hole to realize the detachable connection between the top cover 312 and the shell 311.

Further, the second boss is provided with a groove with an upward opening, and a sealing ring is accommodated in the groove to ensure tightness of the top cover 312 after being covered on the shell 311.

The top cover 312 is provided with an inlet which constitutes the inlet of the filter 31. The top cover 312 is further provided with a first air outlet, which is spaced from the inlet.

The plurality of filter cartridges 313 are disposed in the accommodating space at vertical intervals, and each filter cartridge 313 is filled with an adsorbent for adsorption filtration. The top and bottom of each of the filter cartridges 313 are provided with a plurality of through holes for passing the liquid. When the real-time filtration amount of the filter 31 reaches the critical point, the filter cartridge 313 can be replaced. In this embodiment, the adsorbent is activated carbon.

Referring to fig. 2 and 3, the filter cartridge 313 includes a cartridge body 3131, and an upper cover 3132 and a lower cover 3133 provided at the top and bottom of the cartridge body 3131. The middle part of upper cover 3132 has seted up the via hole, and the inner periphery of upper via hole downwardly extending forms upper boss 3134, and the middle part of lower cover 3133 has seted up down the via hole, and the inner periphery of lower via hole upwardly extends forms lower boss 3135.

Further, an upper wire mesh 3136 is welded to the upper cover 3132. With the above design, liquid is convenient to enter the box 3131 to contact with the adsorbent.

The upper surface of the lower cover 3133 is provided with a support net 3137 and a lower wire net 3138. With the above design, liquid is facilitated to flow out of the cartridge 3131.

The upper cover 3132, the lower cover 3133, and the case 3131 are fastened to each other and sealed by a sealing member. Specifically, the outer periphery of box 3131 is equipped with connecting seat and lower connecting seat outwards the evagination, goes up connecting seat and lower connecting seat and divides in the top and the bottom of box 3131, has seted up the connecting hole on going up the connecting seat, is equipped with down the connecting hole on the lower connecting seat, and the outer periphery of upper cover 3132 board is equipped with the mounting hole, and the lower mounting hole has been seted up to the outer periphery of lower cover 3133 board, and the fastener wears to locate connecting hole and last mounting hole and realizes being connected between box 3131 and the upper cover 3132 simultaneously, and the fastener wears to locate connecting hole and lower mounting hole and realizes being connected between box 3131 and the lower cover 3133 simultaneously.

The upper connecting seat is provided with a first sealing groove with an upward opening, the first sealing groove is positioned at the inner periphery of the upper connecting hole, and the sealing ring is clamped in the first sealing groove. And a second sealing groove with a downward opening is formed in the lower connecting seat, the second sealing groove is positioned at the inner periphery of the lower connecting hole, and the sealing ring is clamped in the second sealing groove. And further, the sealing connection between the case 3131 and the upper and lower covers 3132 and 3133 is realized.

The liquid enters the cartridge 3131 through the upper via hole and exits the cartridge 3131 through the lower via hole.

Referring to fig. 2 and 4, a lower portion of an outer periphery of a filter box 313 is provided with a through hole. The filter box 313 is also provided with a ring of filter mesh 3139 around the periphery, which filter mesh 3139 covers all the through holes. The filter box 313 is located at the very bottom.

The filter 31 includes a central tube 314 erected in the housing 311, and a plurality of support members 315 vertically spaced around the outer periphery of the central tube 314. I.e. the filter cassette 313 is mounted in the receiving space through the central tube 314 and the support 315.

Specifically, the central tube 314 extends downward out of the housing 311, and the bottom of the central tube 314 forms an outlet of the filter 31, and a liquid inlet is formed in the outer periphery of the central tube 314 and is located at the lower part of the housing 311. The top of the center tube 314 extends beyond the top cap 312, and the top of the center tube 314 forms a second exhaust port.

A plurality of filter cartridges 313 are sleeved on the periphery of the central tube 314. When the filter box 313 is sleeved on the outer periphery of the central tube 314, a space is formed between the inner peripheral wall of the upper boss 3134 and the outer peripheral wall of the central tube 314 along the radial direction, so that liquid can enter the box 3131 conveniently. The inner peripheral wall of the lower boss 3135 is spaced radially from the outer peripheral wall of the central tube 314 to facilitate the ingress and egress of liquid into and out of the cartridge 3131.

The filter box 313, which is provided with through holes at the periphery, is positioned at the bottommost part so that liquid can enter the filter box 313 through the periphery and finally enter the liquid inlet.

The plurality of supporting members 315 are disposed in one-to-one correspondence with the plurality of filter cartridges 313, and each supporting member 315 is configured to support a corresponding filter cartridge 313. Wherein, the liquid flows to the outlet through the liquid inlet after being filtered by the plurality of filter boxes 313.

Referring to fig. 2,5 and 6, each supporting member 315 includes a supporting cylinder 3151, and an upper positioning table 3152 and a lower positioning table 3153 respectively arranged at two ends of the supporting cylinder 3151, wherein an upper positioning hole is formed in the middle of the upper positioning table 3152, a lower positioning hole is formed in the middle of the lower positioning table 3153, an upper boss 3134 is located in the upper positioning hole, and a lower boss 3135 is located in the lower positioning hole.

The filter 31 further includes a plurality of spacers 316 sleeved on the outer circumference of the central tube 314 and vertically spaced apart. Each spacer 316 is located between two adjacent filter cartridges 313 for vertically spacing between any two adjacent filter cartridges 313.

Referring to fig. 7 and 8, each spacer 316 includes a spacer 3161 and a plurality of stoppers 3162 circumferentially spaced apart from each other on an inner periphery of the spacer 3161, each stopper 3162 extends radially, and when the spacer 3161 is sleeved on an outer periphery of the central tube 314, an inner periphery of each stopper 3162 is close to the outer periphery of the central tube 314. The inner ends of the stoppers 3162 are spaced apart from each other, so that a space is defined by the stoppers 3162, and the space is used for accommodating the central tube 314.

The filter 31 further includes a locking member 317 for locking the plurality of filter cartridges 313. Specifically, the locking member 317 is sleeved on the outer periphery of the central tube 314 and is located above the top filter box 313, so as to lock the filter box 313 and the central tube 314.

In this embodiment, the locking member 317 includes a sleeve sleeved on the outer periphery of the central tube 314 and a nut, the sleeve is located above all the filter cartridges 313, and the nut is screwed with the central tube 314, so as to lock the filter cartridges 313.

The filtering principle of the filter 31 in the present embodiment is as follows: the liquid enters the filter 31 from the inlet, impurities are removed by adsorption of the adsorbent in the filter box 313, and the liquid flows through the plurality of filter boxes 313 arranged in a stacked manner from top to bottom, and finally, the filtered liquid flows to the liquid inlet of the central tube 314 from the bottommost part of the filter boxes 313, flows to the outlet of the filter 31 from the liquid inlet, and is further conveyed outwards.

The method of replacing the filter cartridge 313 by the filter 31 is as follows:

The connection between the top cap 312 and the housing 311 is first released, then the connection between the locker 317 and the center pipe 314 is released, and then the filter cartridge 313 and the spacer 316 are sequentially taken out.

After the old filter box 313 is taken out, a new filter box 313 is installed in the shell 311, namely, the new filter box 313 and the supporting member 315 are assembled, then the filter box 313, the partition member 316, the filter box 313 and the partition member 316 … … are sequentially placed in the shell, then the adjacent filter boxes 313 are connected, the filter box 313 is locked by the locking member 317, and finally the top cover 312 and the shell 311 are connected, so that the replacement of the filter box 313 in the filter 31 is completed.

In the filter cartridge 313, due to the detachable connection between the cartridge body 3131, the upper cover 3132, and the lower cover 3133, the assembly between the cartridge body 3131, the upper cover 3132, the lower cover 3133, and the support 315 is achieved. After the filter cartridge 313 is detached, replacement of the suction member is achieved by detachment of the filter cartridge 313, thereby achieving replacement of the filter cartridge 313.

Specifically, the filter box 313 is made of corrosion-resistant metal. The central tube 314 is made of corrosion-resistant metal. The supporting member 315 is made of corrosion-resistant metal. The spacer 316 is made of a corrosion-resistant metal. The locking member 317 is made of a corrosion-resistant metal.

Further, each filter 31 is provided with an outflow port. Specifically, the outflow opening is located at the bottom of the filter 31. The filtration system includes an intake manifold 61 for intake air and a return manifold 64 for return liquid. The intake manifold 61 communicates with the inlets of the plurality of filters 31 at the same time, the return manifold 64 communicates with the plurality of outlets at the same time, and when one of the filters 31 stops the filtering operation, the intake manifold 61 communicates with the inlet of that filter 31 and injects gas into the filter 31, and the outlet of that filter 31 communicates with the return manifold 64 to return the liquid in the filter 31. The liquid in the deactivated filter 31 is returned via the intake manifold 61 and the return manifold 64. After the liquid is refluxed, the filter 31 is made to be free from the liquid, and the filter box 313 is convenient to replace.

A transition line is connected between the outlet manifold 4 and the return manifold 64 and is arranged downstream of the second plurality of outlet branches 35. And a valve is arranged on the transition pipeline.

The intake manifold 61 is connected to each inlet via an intake branch 62, and the intake branch 62 is provided with an intake valve 63. The intake valve 63 is electrically connected to the controller.

Each outflow port is connected to the return manifold 64 through a return branch pipe 65, and the return branch pipe 65 is provided with a return valve 66. The return valve 66 is electrically connected to the controller.

That is, when the real-time filtration amount of the filter 31 reaches the critical point and stops operating, the controller controls the first feed valve 36, the second feed valve 37, the first discharge valve 38, and the second discharge valve 39 to be closed, and the intake valve 63 and the return valve 66 to be opened, so that the gas is injected into the filter 31, the liquid in the filter 31 is pushed out by the gas, and the liquid flows to the return manifold 64 through the outflow port and the return branch pipe 65.

The filtration system further comprises a buffer tank 7 for containing the liquid to be filtered. The buffer tank 7 comprises a liquid inlet and a liquid outlet, the liquid inlet is connected with the feeding main pipe 1 through a first connecting pipeline 71, the liquid outlet is connected with the feeding main pipe 1 through a second connecting pipeline 72, the second connecting pipeline 72 is located at the upstream of the conveying pump 2 and located at the downstream of the first connecting pipeline 71, a first control valve is arranged on the first connecting pipeline 71, a second control valve is arranged on the second connecting pipeline 72, a third control valve is arranged on the feeding main pipe, and the third control valve is arranged between the first connecting pipeline 71 and the second connecting pipeline 72.

In this embodiment, both the liquid inlet and the liquid outlet are located at the bottom of the buffer tank 7.

Through the first connecting pipe and the second connecting pipe, the liquid to be filtered can directly enter the feeding main pipe 1, and can be buffered to the buffer tank 7 and then enter the feeding main pipe 1 from the buffer tank 7. Specifically, the first control valve and the second control valve are closed, the third control valve is opened, and the liquid to be filtered directly enters the feed header 1. The first control valve and the second control valve are opened, the third control valve is closed, and external liquid to be filtered firstly enters the buffer tank 7 and then enters the feeding main pipe 1 from the buffer tank 7. Or the first control valve, the second control valve and the third control valve may also be opened simultaneously.

Further, a first liquid level detector 73 and a second liquid level detector 74 are arranged on the buffer tank 7 at vertical intervals, and the first liquid level detector 73 is located above the second liquid level detector 74. The first level detector 73 is used for detecting a high level in the buffer tank 7 and the second level detector 74 is used for a low level in the buffer tank 7. Wherein, when the liquid level in the buffer tank 7 reaches a high liquid level, the first control valve is closed, and when the liquid level in the buffer tank 7 is reduced to a low liquid level, the second control valve is closed.

That is, when the liquid in the buffer tank 7 rises to a high level, the continuous injection of the liquid into the buffer tank 7 is stopped. When the liquid in the buffer tank 7 falls to a low level, the buffer tank 7 is stopped and the liquid is continuously supplied to the feed header 1.

The surge tank 7 is provided with a return port connected to the return manifold 64 for returning the liquid or gas to the surge tank 7. The liquid flowing back into the buffer tank 7 can be filtered by re-entering the filter 31. In this embodiment, the return port is provided in the upper part of the side surface of the buffer tank 7.

A pressure detector is also provided in the buffer tank 7. The pressure detector is electrically connected with the delivery pump 2, and the delivery pump 2 adjusts the frequency according to the pressure in the buffer tank 7 detected by the pressure detector.

The top of the buffer tank 7 is also provided with a breathing port for exhausting gas.

Each filter 31 is provided with an exhaust port, and each exhaust port is communicated with the buffer tank 7. In this embodiment, the exhaust ports include a first exhaust port and a second exhaust port, which are connected to the return manifold 64 and, in turn, to the surge tank 7, respectively.

Further, a cleaning inlet is arranged on the buffer tank 7, a cleaning pipe 75 is connected to the cleaning inlet, and a sewage drain pipe is connected to the sewage drain outlet. In this embodiment, the purge inlet is provided at the top of the surge tank 7. The purge tube 75 is connected to the feed header 1, and the purge tube 75 is disposed upstream of the first connection tube. The cleaning pipe 75 is provided with a cleaning valve. The cleaning valve is electrically connected with the controller.

The buffer tank 7 is also provided with a sewage drain pipeline which is connected with the second connecting pipe. The drain pipe is arranged at the upstream of the second control valve. The drain pipe is provided with a drain valve. In other embodiments, a drain outlet may also be provided at the bottom of the surge tank 7.

The filtration system also includes a fine filter 8 downstream of the filter assembly for further filtering the wine body from macroscopic impurities.

The fine filter 8 is connected with the discharging main pipe 4 and is used for receiving the liquid filtered by the filter assembly, carrying out fine filtration and then conveying the liquid to the discharging main pipe 4. The fine filter 8 is made of corrosion-resistant metal, and a metal filter rod for filtering is arranged in the fine filter.

Specifically, the inlet of the fine filter 8 is connected with the discharging manifold 4 through an input pipeline 81, the outlet of the fine filter 8 is connected with the discharging manifold 4 through an output pipeline 82, the input pipeline 81 is arranged at the upstream of the output pipeline 82, a first valve is arranged on the input pipeline 81, a second valve is arranged on the output pipeline 82, a third valve is arranged on the discharging manifold 4, and the third valve is arranged between the input pipeline 81 and the output pipeline 82. The design can be adopted to directly convey the liquid filtered by the filter assembly to the next process, or to convey the liquid after the liquid is filtered by the fine filter 8 to the next process.

In the above-mentioned filtration system, the liquid to be filtered sequentially passes through the working filters connected in series, and generates a filtration time difference, when the real-time filtration amount of the working filter at the front end reaches a critical point, the controller outputs a control signal, automatically switches the standby filter, and ensures the adsorption balance of the adsorbent activated carbon in the plurality of filters 31, so as to ensure the stability of the filtered liquid.

Preferably, the filtration system includes a cleaning assembly for self-cleaning. The cleaning assembly comprises a water inlet header pipe 91, a plurality of water inlet branch pipes and a plurality of water outlet branch pipes, wherein the water inlet branch pipes are in one-to-one correspondence with the inlets of the filters 31, the water outlet branch pipes are in one-to-one correspondence with the outlets of the filters 31, and the other ends of the water outlet branch pipes are used for being communicated with the outside.

In this embodiment, the intake manifold is shared with the intake manifold 62, i.e., one line may be used for both intake and intake. The intake manifold 91 partially coincides with the intake manifold 61. Each water outlet branch pipe is connected with the first discharging branch pipe 34 and the second discharging branch pipe 35 in parallel, and water outlet valves are arranged on the water outlet branch pipes.

The purge assembly further includes a gas feed line 92 in communication with the feed manifold 1, the gas feed line 92 being disposed upstream of the transfer pump 2 to inject gas into each line downstream. The gas injected through the gas supply pipe 92 flows the liquid in the pipes such as the feed header pipe 1, the first feed branch pipe 32, the second feed branch pipe 33, the first discharge branch pipe 34, the second discharge branch pipe 35, and the like into the buffer tank 7, and the cleaning of each pipe is realized when the liquid flows back.

In this embodiment, the air supply line 92 is provided with a manual valve and a pneumatic butterfly valve.

The filtration system in this embodiment includes pre-production venting, production filtration, and post-production cleaning.

Exhausting before production: the liquid to be filtered firstly enters the buffer tank 7 and is pumped to the filter by the delivery pump 2, the liquid to be filtered enters from the inlet of the filter 31, and the air in the filter 31 is discharged into the buffer tank 7 through the exhaust port of the central tube 314 and the exhaust port of the tank body by the liquid. Whether the filter 31 is filled with liquid or not can be determined by the real-time pressure and/or the real-time flow detected by the detector 5. After the filter 31 is filled with liquid, the corresponding pipeline can be closed by controlling the valve through the controller, so that the filter 31 reaches the state of being full of the tank.

Production and filtration: the controller controls the feed pump 2 to start according to the preset degree inside the controller, and quantitatively feeds the liquid to be filtered to the filter 31 in turn. Meanwhile, during the conveying process, the detector 5 detects and feeds back data to the controller in real time, and the controller controls the valve to be closed according to the data, so that the conveying to the filter 31 is stopped. The liquid to be filtered is in the filter 31, impurities in the liquid to be filtered are adsorbed and filtered by the adsorbent, and the filtered liquid flows out from the center 314. The liquid to be filtered flows to the next filter 31 through one filter 31 until the discharging main pipe 4, namely a plurality of working filters are used in series by controlling the valve by the controller so as to ensure the filtering quality. The liquid to be filtered then enters the fine filter 8 to be received for further filtration, and is then output to the discharge manifold 4 and finally output outwards.

After the filtration amount of the front-end working filter reaches a critical point, that is, the adsorbent in the filter 31 that is the first to be filtered is deactivated, the controller controls the front-end working filter to stop working, and switches the backup filter to be connected in series downstream of all the working filters. At the same time, gas is injected into the filter 31 through the intake manifold 61, unfiltered liquid in the filter 31 which is stopped is returned to the buffer tank 7 through the outflow port, and the filter cartridge 313 is replaced, so that the filter 31 serves as a new filter 31, i.e., a spare filter.

Cleaning after production: after the liquid to be filtered is filtered, the filtered liquid is sent to the next process under pressure through the intake manifold 61. At the same time, the unfiltered liquid remaining in the filter cartridge 313 is forced through the outflow opening to the discharge manifold 4 and through the transition pipe to the return manifold 64 and into the return buffer tank 7 for storage and waiting for the next filtration.

After the filter 31 is emptied, the cleaning assembly cleans the pipelines such as the filter 31, the fine filter 8, the feeding main pipe 1, the discharging main pipe 4 and the like.

The filtering system in the embodiment can be applied to a white spirit production line, and full-automatic operation is realized through program control so as to keep the adsorption equilibrium of the adsorption element in filtering and keep the quality of the wine stable.

S1, providing a plurality of filters 31, enabling at least one filter 31 to be a standby filter, enabling at least two filters 31 to be working filters, and enabling the plurality of working filters to be arranged in series.

And S2, pumping the liquid to be filtered, and enabling the liquid to be filtered to sequentially pass through the plurality of filters 31. Wherein the adsorption capacities of the plurality of working filters are gradually increased from upstream to downstream.

The plurality of filters 31 are classified into a working filter and a spare filter according to the adsorption capacity of the adsorbent in each filter 31, and are realized by controlling the opening and closing of valves on each filter 31. Typically, the adsorption capacity of the back-up filter is maximized.

Specifically, the step of gradually increasing the adsorption capacities of the plurality of working filters from upstream to downstream includes:

S21, enabling the liquid to be filtered to enter one filter for filtering, wherein the filter is defined as a working filter at the front end.

S22, when the real-time filtering quantity of the working filter at the front end reaches the mth flow preset value, starting the (m+1) th filter, and connecting the filters in series with the downstream of all the working filters; wherein the mth flow preset value is m× (the preset maximum filtering value of the working filter at the front end/the number of all the working filters n-1), n is more than or equal to 2, m is more than or equal to 1, n is more than or equal to m, and m and n are natural numbers. In this embodiment, there are 5 filters, so n=5, and m may be 1,2, 3, or 4.

S23, gradually increasing the adsorption capacity of all working filters from upstream to downstream by gradually switching in the filters.

In this embodiment, the liquid to be filtered is first introduced into the No.1 filter, and when the real-time filtering amount detected by the detector reaches the first flow preset value, the No. 2 filter is opened, so that the No. 2 filter is connected in series downstream of the No.1 filter. The first flow preset value is a preset maximum filtering value/4.

And continuing filtering, and when the real-time filtering reaches a second flow preset value, starting a No. 3 filter, so that the No. 3 filter is connected in series with the downstream of the No. 2 filter. The second flow preset value is 2 x preset maximum filter value/4.

And continuing filtering, and starting the No. 4 filter when the real-time filtering quantity reaches a third flow preset value, so that the No. 4 filter is connected in series with the downstream of the No. 3 filter. The third flow preset value is 3 x preset maximum filter value/4.

The remaining filter No. 5 serves as a backup filter, and thus, the operation of removing one filter as a backup filter and the rest being working filters is completed.

The liquid to be filtered enters the filter assembly after passing through the feeding header pipe 1 and sequentially enters the working filters connected in series, namely sequentially passes through the No.1 filter, the No.2 filter, the No.3 filter and the No. 4 filter. When the liquid to be filtered passes through each filter 31, the liquid to be filtered is filtered by the adsorption of the adsorbent in the filter 31.

And S3, when the real-time filtering quantity of the working filter at the front end reaches a critical point, controlling the working filter to stop filtering, and controlling the standby filter to be connected in series with the downstream of all the working filters for filtering.

Continuing filtering, when the real-time flow reaches the fourth preset flow value, wherein the fourth preset flow value is 4×the preset maximum filtering value/4, and is the preset maximum filtering value, that is, the critical point of the filter No.1 is reached, the filter No. 5 is opened, the filter No.1 is closed, and the filter No. 5 is connected in series with the downstream of the filter No. 4.

That is, the detector 5 detects the real-time flow rate and the real-time filtering amount, and determines whether the working filter at the front end reaches the critical point.

When the critical point is reached, the controller is realized by controlling the opening and closing of the valve, the working filter at the front end is stopped, and the standby filter is started.

At the same time, an alarm is raised to facilitate the replacement of the filter cartridge 313 by a worker for a filter that is out of service.

When the filter 1 stops filtering as a standby filter, the filter 2 is a working filter positioned at the front end. When the total filtering amount of the No. 2 filter detected by the detector reaches a preset maximum filter value, the No. 2 filter reaches a critical point, and then the No. 2 filter stops filtering, and meanwhile, the No. 1 filter is started, so that the No. 1 filter is positioned at the downstream of the No. 5 filter.

The filtering operation is repeated in sequence to realize continuous filtering.

By the filtering method, when the liquid to be filtered is filtered by a plurality of filters, namely the filtering assembly, the flow rate of the adsorbent passing through the filter assembly is kept consistent.

Further, the difference in adsorption capacity between any two adjacent working filters and the difference in adsorption capacity between the working filter at the end and the spare filter in the upstream-downstream direction are equal, that is, the adsorption capacities of the plurality of working filters and the spare filter in the upstream-downstream direction are increased in an arithmetic progression.

For example, five filters 31, which are a filter No. 1, a filter No. 2, a filter No. 3, a filter No. 4, and a filter No. 5, respectively, have adsorption capacities, i.e., filtration amounts that each filter can still filter, of 50 tons, 100 tons, 150 tons, 200 tons, and 200 tons, respectively, with 200 tons being preset maximum filtration values for each filter. The filters 31 having adsorption capacities of 50 tons, 100 tons, 150 tons and 200 tons are sequentially connected in series as working filters, i.e., the filter No. 1, the filter No. 2, the filter No. 3 and the filter No. 4 are working filters, and the filter No. 5 is a spare filter.

With the filtration, and when the filtration amount of each filter is reduced by 50 tons, the filter No. 1 reaches the critical point to stop the filtration, and the filter No. 5 is switched to operate, i.e., the filter No.2, the filter No. 3, the filter No. 4, and the filter No. 5 are operated as the operating filters, and the adsorption capacity at this time is still 50 tons, 100 tons, 150 tons, and 200 tons.

Regardless of the switching to any one of the filters 31 as a spare filter during the filtration, the sum of the adsorption capacities of the remaining filters 31 remains the same.

By adopting the design, the filtering quantity of the filtering system can be always kept consistent during filtering, so that the consistency of the removal rate of liquid to be filtered is ensured, and the quality stability of the liquid after filtering is ensured.

While the invention has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A method of filtration, wherein the method of filtration employs a filtration system comprising:

A feed header for delivering a liquid to be filtered;

A transfer pump disposed on the feed header;

a filter assembly for receiving a liquid to be filtered and filtering, the filter assembly comprising a plurality of filters; a discharge manifold disposed downstream of the filter assembly for delivering filtered liquid outwardly;

At least one filter is used as a standby filter, at least two filters are used as working filters, at least two working filters are arranged in series, the adsorption capacity of at least two working filters is gradually increased from upstream to downstream, and the adsorption capacity of the standby filter is larger than or equal to that of the working filters;

The filter includes:

A housing having an accommodating space therein and having an opening at a top;

the top cover is detachably arranged at the top of the shell;

Wherein, when the real-time filtering amount of the filter reaches a critical point, the filter box can be replaced;

the filter comprises a central tube and a plurality of supporting pieces, wherein the central tube is vertically erected in the shell, the supporting pieces are sleeved on the periphery of the central tube along the vertical interval, the central tube downwards extends out of the shell, the bottom of the central tube forms an outlet of the filter, the periphery of the central tube is provided with a liquid inlet, the liquid inlet is positioned at the lower part of the shell, a plurality of filter boxes are sleeved on the periphery of the central tube, the supporting pieces are in one-to-one correspondence with the filter boxes, and each supporting piece is used for supporting the corresponding filter box;

wherein, the liquid flows to the outlet through the liquid inlet after being filtered by a plurality of the filter boxes;

Each supporting piece comprises a supporting cylinder, an upper positioning table and a lower positioning table which are respectively arranged at two ends of the supporting cylinder, wherein an upper positioning hole is formed in the middle of the upper positioning table, a lower positioning hole is formed in the middle of the lower positioning table, the filter box comprises a box body, an upper pore plate and a lower pore plate which are respectively arranged at the top of the box body, an upper through hole is formed in the middle of the upper pore plate, the inner periphery of the upper through hole extends downwards to form an upper boss, a lower through hole is formed in the middle of the lower pore plate, the inner periphery of the lower through hole extends upwards to form a lower boss, the upper boss is positioned in the upper positioning hole, and the lower boss is positioned in the lower positioning hole;

The filter also comprises a plurality of spacing pieces sleeved on the periphery of the central tube and arranged along the vertical interval, each spacing piece is positioned between two adjacent filter boxes, each spacing piece comprises a spacing cylinder and a plurality of limiting blocks arranged on the inner periphery of the spacing cylinder along the circumferential interval, each limiting block extends along the radial direction, and when the spacing cylinder is sleeved on the periphery of the central tube, the inner periphery of each limiting block is close to the periphery of the central tube;

the filter also comprises a locking piece, wherein the locking piece is sleeved on the periphery of the central tube and is positioned above the filter box at the top and used for locking the filter box and the central tube;

The periphery of the filter box is externally and convexly provided with an upper connecting seat and a lower connecting seat, the upper connecting seat and the lower connecting seat are respectively arranged at the top and the bottom of the filter box, an upper connecting hole is formed in the upper connecting seat, a lower connecting hole is formed in the lower connecting seat, and a fastener is simultaneously penetrated through the upper connecting hole and the lower connecting hole to realize connection between the adjacent filter boxes;

The filtering method comprises the following steps:

at least one filter is made to be a standby filter, at least two filters are working filters, and a plurality of working filters are arranged in series;

Pumping liquid to be filtered through the conveying pump, so that the liquid to be filtered sequentially passes through a plurality of working filters; wherein the adsorption capacities of a plurality of the working filters are gradually increased from upstream to downstream;

when the real-time filtering quantity of the working filter at the front end reaches a critical point, controlling the working filter to stop filtering, and controlling the standby filter to be connected in series to the downstream of all the working filters for filtering;

wherein the step of gradually increasing the adsorption capacities of the plurality of working filters from upstream to downstream includes:

Gradually increasing the adsorption capacity of all working filters from upstream to downstream by gradually switching in the filters; and when any one of the filters is switched to be used as a standby filter, the sum of adsorption capacities of the other filters is kept consistent.

2. The filtration method according to claim 1, wherein the difference in adsorption capacity between any adjacent two working filters and the difference in adsorption capacity between the working filter and the spare filter at the end are equal in the upstream-to-downstream direction.

3. The filtration method of claim 1, wherein each of the filters is provided with an inlet and an outlet, and the filter assembly comprises a first feed leg and a second feed leg disposed corresponding to the inlet of each of the filters, and a first discharge leg and a second discharge leg disposed corresponding to the outlet of each of the filters; each first feeding branch pipe is connected with the feeding main pipe, each first feeding branch pipe is provided with a first feeding valve, each second feeding branch pipe is provided with a second feeding valve, each first discharging branch pipe is connected with the adjacent second feeding branch pipe to enable a plurality of filters to be connected end to end in sequence, each first discharging branch pipe is provided with a first discharging valve, and each second discharging branch pipe is provided with a second discharging valve;

4. A filtration method according to claim 3, wherein the working filter comprises at least three filters, the first feed valve and the second discharge valve of the working filter located in the middle being closed, the second feed valve and the first discharge valve being open.

5. A filtering method according to claim 3, characterized in that a detector is arranged downstream of the transfer pump, said detector being arranged on the feed manifold for detecting the real-time flow and the real-time filtering quantity, each filter having a preset maximum filtering value, said preset maximum filtering value being obtained according to the total filtering quantity of the filter, and said preset maximum filtering value not being greater than the total filtering quantity of the filter, the filter reaching a critical point when the real-time filtering quantity of the filter reaches said preset maximum filtering value.

6. The filtration method of claim 5, wherein the filtration system comprises a controller electrically connected to the plurality of first feed valves, the plurality of second feed valves, the plurality of first discharge valves, and the plurality of second discharge valves simultaneously, the controller electrically connected to the detector to receive the detected signals, the controller electrically connected to the transfer pump to control the opening and closing of the transfer pump, the controller further controlling the frequency of the transfer pump.

7. The filtration method according to claim 1, wherein each of the filters is provided with an outflow port, the filtration system includes an intake manifold for intake air and a return manifold for return air, the intake manifold communicates with inlets of a plurality of the filters at the same time, the return manifold communicates with a plurality of the outflow ports at the same time, when one of the filters stops filtration, the intake manifold communicates with the inlet of the filter and injects gas into the filter, and the outflow port of the filter communicates with the return manifold to return liquid in the filter.

8. The filtration method according to claim 1, wherein the filtration system further comprises a buffer tank for containing a liquid to be filtered, the buffer tank comprising a liquid inlet and a liquid outlet, the liquid inlet being connected to the feed manifold by a first connecting line, the liquid outlet being connected to the feed manifold by a second connecting line, the second connecting line being located upstream of the transfer pump and downstream of the first connecting line, the first connecting line being provided with a first control valve, the second connecting line being provided with a second control valve, the feed manifold being provided with a third control valve, the third control valve being arranged between the first connecting line and the second connecting line.

9. The filtering method according to claim 8, wherein a first liquid level detector and a second liquid level detector are vertically arranged on the buffer tank at intervals, the first liquid level detector is located above the second liquid level detector, the first liquid level detector is used for detecting a high liquid level in the buffer tank, and the second liquid level detector is used for detecting a low liquid level in the buffer tank;

10. The method according to claim 8, wherein the buffer tank is provided with a cleaning inlet and a drain outlet, the cleaning inlet is connected with a cleaning water inlet pipe, and the drain outlet is connected with a drain pipe;

11. The filtration method of claim 1, wherein the filtration system further comprises a fine filter disposed downstream of the filter assembly, the fine filter being coupled to the discharge manifold for receiving the filtered liquid from the filter assembly and delivering the filtered liquid to the discharge manifold after fine filtration.

12. The method of claim 11, wherein the inlet of the fine filter is connected to the outlet manifold via an inlet line, the outlet of the fine filter is connected to the outlet manifold via an outlet line, the inlet line is disposed upstream of the outlet line, a first valve is disposed on the inlet line, a second valve is disposed on the outlet line, a third valve is disposed on the outlet manifold, and the third valve is disposed between the inlet line and the outlet line.

13. The filtration method of claim 1, wherein the filtration system comprises a cleaning assembly comprising a water inlet manifold, a plurality of water inlet branches and a plurality of water outlet branches, wherein the plurality of water inlet branches are arranged in one-to-one correspondence with the inlets of the plurality of filters, the plurality of water outlet branches are arranged in one-to-one correspondence with the outlets of the plurality of filters, and the other ends of the water outlet branches are used for communication with the outside.

14. The filtration method of claim 13, wherein the purge assembly further comprises a plenum line in communication with the feed manifold, the plenum line being disposed upstream of the transfer pump to inject gas into each of the downstream lines.