CN103111116A - Cross flow filtering system with filter element deep-cleaning and regeneration function - Google Patents
Cross flow filtering system with filter element deep-cleaning and regeneration function Download PDFInfo
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Abstract
The invention discloses a cross flow filtering system with a filter element deep-cleaning and regeneration function. The cross flow filtering system has the following working modes: a first cross flow filtering mode, in such a first cross flow filtering mode, the material liquid to be filtered which is filled into the cross flow filtering system is acted by a circulation pump in the cross flow filtering system and therefore is subjected to the first cross flow filtration of a filter; a filter element non-filtering washing mode, in such a filter element non-filtering washing mode, filter element washing liquid which is filled into the cross flow filtering system to replace the material liquid to be filtered is acted by the circulation pump in the cross flow filtering system, so that the filter element washing liquid firstly passes through a filter element filtering channel in the filter and secondly is discharged out from the cross flow filtering system; and a second cross flow filtering mode, in such a second cross flow filtering mode, impurity solving liquid which is filled into the cross flow filtering system to replace the filter element washing liquid is acted by the circulation pump in the cross flow filtering system and therefore is subjected to second cross flow filtration of the filter.
Description
Technical field
The present invention relates to a kind of cross-flow filtration system with filter core deep clean regeneration function.
Background technology
Existing liquid cross-flow filtration mainly relies on backwash liquor periodically to recoil and realizes the regeneration of filter core cleaning, thereby recovers filtration flux.But along with the lengthening of filtration time, depend merely on the thorough regeneration that this kind renovation process can not be realized filter core, thereby affect the service life of filter core.
Summary of the invention
The present invention aims to provide and a kind ofly can carry out to filter core the cross-flow filtration method of the liquid of deep clean regeneration.
The step that the cross-flow filtration method of liquid of the present invention comprises is: feed liquid to be filtered is injected the cross-flow filtration system, make described feed liquid to be filtered be subject to the effect of circulating pump in this cross-flow filtration system and realized the first cross-flow filtration by cross-flow filter; Inject the filter element cleaning liquid of replacing feed liquid to be filtered in described cross-flow filtration system, make described filter element cleaning liquid be subject to the effect of circulating pump in this cross-flow filtration system and first process the filter element filtering passage in cross-flow filter, then discharge from the cross-flow filtration system; Inject the impurity lysate of replacing filter element cleaning liquid in described cross-flow filtration system, make described impurity lysate be subject to the effect of circulating pump in this cross-flow filtration system and be realized the second cross-flow filtration by cross-flow filter, the impurity lysate that purifies with cross-flow filter during the second cross-flow filtration carries out backwash to the filter core in cross-flow filter; When the operating index of the second cross-flow filtration reaches the standard of setting, more described cross-flow filtration system is switched to described the first cross-flow filtration from the second cross-flow filtration.
Be further, first make described filter element cleaning liquid by first direction the filter element filtering passage in cross-flow filter through later discharging the cross-flow filtration system, then make described filter element cleaning liquid by the filter element filtering passage of the second direction opposite with described first direction in cross-flow filter through discharging later the cross-flow filtration system.
Be further, have in described cross-flow filtration system in the situation that do not change the liquid effects direction of circulating pump make described filter element cleaning liquid can be respectively by first direction and second direction the pipeline switched system of process the filter element filtering passage in cross-flow filter.
Further that the inceptive filtering pressure setting of described the second cross-flow filtration is the X(2≤X≤10 of the inceptive filtering pressure of the first cross-flow filtration) doubly; When the filtration flux of the second cross-flow filtration reaches the Y(Y of the inceptive filtering flux of the first cross-flow filtration 〉=X) times, described cross-flow filtration system is switched to described the first cross-flow filtration from the second cross-flow filtration.
Further that the inceptive filtering pressure setting of described the second cross-flow filtration is the X(2≤X≤6 of the inceptive filtering pressure of the first cross-flow filtration) doubly.
Described feed liquid to be filtered is sulfate liquor; Described filter element cleaning liquid is clear water, and described impurity lysate employing pH value is 1.5 to 5.0 sulfuric acid solution.
Further that the filter core in described cross-flow filter is made of a kind of in titanium-aluminium alloy porous material, ferro-aluminum alloy porous material, nickel alumin(i)um alloy porous material.
Further to inject feed liquid to be filtered, filter element cleaning liquid and impurity lysate by fluid infusion system in described cross-flow filtration system; Described fluid infusion system has the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern of can be respectively injecting feed liquid to be filtered, filter element cleaning liquid and impurity lysate and can switching mutually in the described cross-flow filtration system.
Be further, described fluid infusion system comprises the first container, second container and the 3rd container of depositing respectively feed liquid to be filtered, filter element cleaning liquid and impurity lysate, described the first container, second container and the 3rd container are connected with the major cycle pipeline of cross-flow filtration system by the first liquid supplementation pipe, the second liquid supplementation pipe, the 3rd liquid supplementation pipe and through the fluid infusion pump respectively, are respectively equipped with the first control valve, the second control valve and the 3rd control valve on described the first liquid supplementation pipe, the second liquid supplementation pipe and the 3rd liquid supplementation pipe.
Further to realize automatic switchover between the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern by control system.
Further with the backwash medium, the filter core in cross-flow filter to be carried out backwash during the first cross-flow filtration.
At first above-mentioned cross-flow filtration method of the present invention rinses the filter element filtering passage by filter element cleaning liquid, thereby removes on filter core movably impurity of major part; Secondly, by the filtration to the impurity lysate, with the impurity lysate that filters out, filter core is carried out backwash, can will take out of with the impurity lysate after the deep layer impurity dissolving that be difficult in filter core be rinsed.Therefore, said method realized the regeneration of the deep clean of filter core, increased filter core service life.
The cross-flow filtration system with filter core deep clean regeneration function that can realize said method will be provided below the present invention.It has following mode of operation: the first cross-flow filtration pattern under described the first cross-flow filtration pattern, is injected into feed liquid to be filtered in the cross-flow filtration system and is subject to the effect of circulating pump in this cross-flow filtration system and is realized the first cross-flow filtration by cross-flow filter; The non-filtration cleaning model of filter core, under the non-filtration cleaning model of described filter core, be injected into the filter element cleaning liquid of replacing feed liquid to be filtered in the cross-flow filtration system and be subject to the effect of circulating pump in this cross-flow filtration system and first process the filter element filtering passage in cross-flow filter, then discharge from the cross-flow filtration system; The second cross-flow filtration pattern, under described the second cross-flow filtration pattern, be injected into the impurity lysate of replacing filter element cleaning liquid in the cross-flow filtration system and be subject to the effect of circulating pump in this cross-flow filtration system and realized the second cross-flow filtration by cross-flow filter, and the impurity lysate that purifies from cross-flow filter during the second cross-flow filtration regularly carries out backwash to the filter core in cross-flow filter; Between above-mentioned the first cross-flow filtration pattern, the non-filtration cleaning model of filter core and the second cross-flow filtration pattern at least can according to from the first cross-flow filtration pattern to filter core non-filtration cleaning model, carry out one-way circulation from the non-filtration cleaning model of filter core to the second cross-flow filtration pattern, from the second cross-flow filtration pattern to the first cross-flow filtration pattern and switch.
Be further, have in described cross-flow filtration system in the situation that do not change the liquid effects direction of circulating pump make described filter element cleaning liquid can be respectively by the pipeline switched system of process first direction and the filter element filtering passage of second direction in cross-flow filter opposite with described first direction.
Further that the inceptive filtering pressure setting of described the second cross-flow filtration is X (2≤X≤10) times of the inceptive filtering pressure of the first cross-flow filtration; When the filtration flux of the second cross-flow filtration reached the Y(Y of the inceptive filtering flux of the first cross-flow filtration 〉=X) times, described cross-flow filtration system switched to described the first cross-flow filtration from the second cross-flow filtration.
Further that the inceptive filtering pressure setting of described the second cross-flow filtration is the X(2≤X≤6 of the inceptive filtering pressure of the first cross-flow filtration) doubly.
Further also to comprise for inject the fluid infusion system of feed liquid to be filtered, filter element cleaning liquid and impurity lysate to the cross-flow filtration system; Described fluid infusion system has the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern of can be respectively injecting feed liquid to be filtered, filter element cleaning liquid and impurity lysate and can switching mutually in the described cross-flow filtration system; Described the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern coordinate execution with the first cross-flow filtration pattern, the non-filtration cleaning model of filter core and the second cross-flow filtration pattern respectively.
Be further, described fluid infusion system comprises the first container, second container and the 3rd container of depositing respectively feed liquid to be filtered, filter element cleaning liquid and impurity lysate, described the first container, second container and the 3rd container are connected with the major cycle pipeline of cross-flow filtration system by the first liquid supplementation pipe, the second liquid supplementation pipe, the 3rd liquid supplementation pipe and through the fluid infusion pump respectively, are respectively equipped with the first control valve, the second control valve and the 3rd control valve on described the first liquid supplementation pipe, the second liquid supplementation pipe and the 3rd liquid supplementation pipe.
Further that described fluid infusion system has the control system that automaticallyes switch between the first fluid infusion pattern that realizes, the second fluid infusion pattern and the 3rd fluid infusion pattern.
Described feed liquid to be filtered is sulfate liquor; Described filter element cleaning liquid is clear water, and described impurity lysate employing pH value is 1.5 to 5.0 sulfuric acid solution.
Further that the filter core in described cross-flow filter is made of a kind of in titanium-aluminium alloy porous material, ferro-aluminum alloy porous material, nickel alumin(i)um alloy porous material.
At first above-mentioned cross-flow filtration of the present invention system rinses the filter element filtering passage by filter element cleaning liquid, thereby removes on filter core movably impurity of major part; Secondly, by the filtration to the impurity lysate, with the impurity lysate that filters out, filter core is carried out backwash, can will take out of with the impurity lysate after the deep layer impurity dissolving that be difficult in filter core be rinsed.Therefore, this cross-flow filtration system has realized the deep clean regeneration to filter core, has increased filter core service life.
The present invention is described further below in conjunction with the drawings and specific embodiments.The aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Fig. 1 is the structure principle chart of cross-flow filtration of the present invention system.
Fig. 2 is the structural representation of the cross-flow filtration system of the embodiment of the present invention.
The specific embodiment
At first point out, term involved in the present invention " stoste ", " concentrate " and " clean liquid " are all the technical terms in the cross-flow filtration field.Wherein, " stoste " is to prepare the liquid of filtration; " concentrate " refers to by cross-flow filter but liquid being filtered not; The liquid that " clean liquid " is purified by cross-flow filter.
As shown in Figure 1, the step that the cross-flow filtration method of liquid of the present invention comprises is: feed liquid to be filtered is injected cross-flow filtration system 1, make described feed liquid to be filtered be subject to the effect of circulating pump 101 in this cross-flow filtration system 1 and realized the first cross-flow filtration by cross-flow filter 102; Inject the filter element cleaning liquid of replacing feed liquid to be filtered in described cross-flow filtration system 1, make described filter element cleaning liquid be subject to the effect of circulating pump 101 in this cross-flow filtration system 1 and first process the filter element filtering passage in cross-flow filter 102, then discharge from cross-flow filtration system 1; Inject the impurity lysate of replacing filter element cleaning liquid in described cross-flow filtration system 1, make described impurity lysate be subject to the effect of circulating pump 101 in this cross-flow filtration system 1 and realized the second cross-flow filtration by cross-flow filter 102, the impurity lysate that purifies with cross-flow filter 102 during the second cross-flow filtration carries out backwash to the filter cores in cross-flow filter 102; When the operating index of the second cross-flow filtration reaches the standard of setting, more described cross-flow filtration system 1 is switched to described the first cross-flow filtration from the second cross-flow filtration.For said method, those skilled in the art are fully aware of, are not filtered for filter element cleaning liquid is only flow through from the filter element filtering passage, only need to close the valve that originally just is provided with on the clean liquid output channel of cross-flow filter 102 and get final product.In addition, itself also be provided with concentrate drain valve Kp on the major cycle pipeline 105 of existing cross-flow filtration system 1, those skilled in the art are also fully aware of, the concentrate that produces for filter element cleaning liquid and the first cross-flow filtration, the second cross-flow filtration the time is discharged from cross-flow filtration system 1, as long as open described concentrate drain valve Kp.In addition, for to dissolved impurity, the impurity lysate can adopt the corrosive solutions such as strong acid usually.Therefore, the present invention advises that the interior filter core of described cross-flow filter 102 adopts a kind of formation in the exsertile titanium-aluminium alloy porous material of corrosion resistance, ferro-aluminum alloy porous material, nickel alumin(i)um alloy porous material.
In said method of the present invention, after utilizing filter element cleaning liquid that the filter element filtering passage is rinsed, can remove on filter core movably impurity of major part, for example the long period filters and slag of deposition etc.The application the inventor just use filter element cleaning liquid that the filter element filtering passage is rinsed to have carried out test of many times, the inventor finds, as shown in Figure 1, when make always described filter element cleaning liquid by first direction D1 the filter element filtering passage in cross-flow filter 102 through out-of-date, the filter element cleaning liquid that discharges from concentrate drain valve Kp can be relatively limpid state from relatively dirty state-transition gradually; Yet, if make again this moment described filter element cleaning liquid by passing through the filter element filtering passage of the second direction D2 opposite with described first direction D1 in cross-flow filter 102, still exist from the filter element cleaning liquid that concentrate drain valve Kp discharges from relatively dirty state to relatively limpid state variation, this explanation, the effect that one direction is cleaned does not reach optimal cleaning performance.Therefore, the present invention further adopted first make described filter element cleaning liquid by the filter element filtering passage of first direction D1 in cross-flow filter 102 through discharging later cross-flow filtration system 1, make again described filter element cleaning liquid by the filter element filtering passage of the second direction D2 opposite with described first direction D1 in cross-flow filter 102 through discharging later the technological means of cross-flow filtration system 1, thereby improved the developing result to filter core.Certainly, those skilled in the art are also fully aware of, and described first direction D1 or second direction D2 must refer to the direction from the stoste input of cross-flow filter 102 to the concentrate output.
Above-mentioned bi-directional filtered in order to realize, can adopt more mode to realize.For example, can change the installation direction of circulating pump 101, or use two circulating pumps 101 that switchable installation direction is opposite, perhaps the pipeline of cross-flow filter 102 front and back be transformed etc.Obviously, above-mentioned these modes all very bother, and are very little in the possibility of industrial application.To this, as shown in Figure 1, also have in described cross-flow filtration of the present invention system 1 in the situation that do not change the liquid effects direction of circulating pump 101 make described filter element cleaning liquid can be respectively by first direction D1 and second direction D2 the pipeline switched system 103 of process the filter element filtering passage in cross-flow filter 102.a kind of concrete structure as pipeline switched system 103, as shown in Figure 1, it comprises the first diversion pipeline 103a and the second diversion pipeline 103b that two ends are connected with major cycle pipeline 105 respectively, the tie point of described the first diversion pipeline 103a and major cycle pipeline 105 lays respectively at the two ends of cross-flow filter 102, the tie point of the second diversion pipeline 103b and major cycle pipeline 105 lays respectively at the two ends of cross-flow filter 102 equally, be respectively equipped with valve K1 on described major cycle pipeline 105 between the tie point of the tie point of the first diversion pipeline 103a and major cycle pipeline 105 and the second diversion pipeline 103b and major cycle pipeline 105, K2, be respectively equipped with valve K3 on the first diversion pipeline 103a and the second diversion pipeline 103b, K4.For above-mentioned pipeline switched system 103, if will make filter element cleaning liquid pass through cross-flow filter 102 by first direction D1, only need Open valve K1, K2, valve-off K3, K4 get final product; If make filter element cleaning liquid pass through cross-flow filter 102 by second direction D2, only need Open valve K3, K4, valve-off K1, K2 get final product.
In said method of the present invention, in order further to improve the deep clean effect to filter core, the inceptive filtering pressure setting of described the second cross-flow filtration is the X(2≤X≤10 of the inceptive filtering pressure of the first cross-flow filtration) doubly; When the filtration flux of the second cross-flow filtration reaches the Y(Y of the inceptive filtering flux of the first cross-flow filtration 〉=X) times, described cross-flow filtration system (1) is switched to described the first cross-flow filtration from the second cross-flow filtration.Be the X(2≤X≤10 of the inceptive filtering pressure of the first cross-flow filtration with the inceptive filtering pressure setting of the second cross-flow filtration) doubly, be in order to impel the impurity lysate to be penetrated in the duct of filter core as much as possible under larger pressure, thereby the impurity particle that will stop up the duct is disposed as much as possible.In the situation that the inceptive filtering pressure setting of the second cross-flow filtration is higher, the filtration flux of the second cross-flow filtration ought to be larger than the inceptive filtering flux of the first cross-flow filtration, otherwise explanation filter core regeneration effect is poor, and filter core is seriously polluted.Therefore, the present invention is just the X(2≤X≤10 of the inceptive filtering pressure of the first cross-flow filtration at the inceptive filtering pressure setting of the second cross-flow filtration) on doubly basis, the filtration flux of the second cross-flow filtration is reached the Y(Y of the inceptive filtering flux of the first cross-flow filtration 〉=X) doubly as cross-flow filtration system (1) is switched to the prerequisite of described the first cross-flow filtration from the second cross-flow filtration, thus the strainability when making filter element filtering performance after purifying regeneration substantially reach filter core initial stage use.On the basis of technique scheme, the inceptive filtering pressure setting of described the second cross-flow filtration is the X(2≤X≤6 of the inceptive filtering pressure of the first cross-flow filtration) doubly be advisable.
As shown in Figure 1, in said method of the present invention, be to inject feed liquid to be filtered, filter element cleaning liquid and impurity lysate by fluid infusion system 104 in described cross-flow filtration system 1; Described fluid infusion system 104 has the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern of can be respectively injecting feed liquid to be filtered, filter element cleaning liquid and impurity lysate and can switching mutually in the described cross-flow filtration system 1.Switching between the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern both can be fully realizes by artificial, can certainly realize automatic switchover between the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern by control system.particularly, as shown in Figure 2, described fluid infusion system 104 comprises deposits respectively feed liquid to be filtered, the first container 104a of filter element cleaning liquid and impurity lysate, second container 104b and the 3rd container 104c, described the first container 104a, second container 104b and the 3rd container 104c are respectively by the first liquid supplementation pipe, the second liquid supplementation pipe, the 3rd liquid supplementation pipe also is connected with the major cycle pipeline 105 of cross-flow filtration system 1 through fluid infusion pump 104d, described the first liquid supplementation pipe, be respectively equipped with the first control valve Kb1 on the second liquid supplementation pipe and the 3rd liquid supplementation pipe, the second control valve Kb2 and the 3rd control valve Kb3.If realize automatic switchover between the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern, only need to carry out automatically controlling getting final product to the first control valve Kb1, the second control valve Kb2 and the 3rd control valve Kb3 by control system.
In order to realize above-mentioned cross-flow filtration method of the present invention, the below provides a kind of cross-flow filtration system with filter core deep clean regeneration function, as shown in Figure 1, it has following mode of operation: the first cross-flow filtration pattern, under described the first cross-flow filtration pattern, be injected into feed liquid to be filtered in cross-flow filtration system 1 and be subject to the effect of circulating pump 101 in this cross-flow filtration system 1 and realized the first cross-flow filtration by cross-flow filter 102; The non-filtration cleaning model of filter core, under the non-filtration cleaning model of described filter core, be injected into the filter element cleaning liquid of replacing feed liquid to be filtered in cross-flow filtration system 1 and be subject to the effect of circulating pump 101 in this cross-flow filtration system 1 and first process the filter element filtering passage in cross-flow filter 102, then discharge from cross-flow filtration system 1; The second cross-flow filtration pattern, under described the second cross-flow filtration pattern, be injected into the impurity lysate of replacing filter element cleaning liquid in cross-flow filtration system 1 and be subject to the effect of circulating pump 101 in this cross-flow filtration system 1 and realized the second cross-flow filtration by cross-flow filter 102, and the impurity lysate that purifies from cross-flow filter 102 during the second cross-flow filtration regularly carries out backwash to the filter cores in cross-flow filter 102; Between above-mentioned the first cross-flow filtration pattern, the non-filtration cleaning model of filter core and the second cross-flow filtration pattern at least can according to from the first cross-flow filtration pattern to filter core non-filtration cleaning model, carry out one-way circulation from the non-filtration cleaning model of filter core to the second cross-flow filtration pattern, from the second cross-flow filtration pattern to the first cross-flow filtration pattern and switch.Obviously, the switching between the first cross-flow filtration pattern, the non-filtration cleaning model of filter core and the second cross-flow filtration pattern namely can by manually completing, also can realize automatic control.Wherein, the filter core in described cross-flow filter 102 is made of a kind of in titanium-aluminium alloy porous material, ferro-aluminum alloy porous material, nickel alumin(i)um alloy porous material.
In addition, have in described cross-flow filtration system 1 in the situation that do not change the liquid effects direction of circulating pump 101 make described filter element cleaning liquid can be respectively by the pipeline switched system of process first direction and the filter element filtering passage of second direction in cross-flow filter 102 opposite with described first direction.In addition, the inceptive filtering pressure setting of described the second cross-flow filtration is the X(2≤X≤10 of the inceptive filtering pressure of the first cross-flow filtration) doubly; When the filtration flux of the second cross-flow filtration reached the Y(Y of the inceptive filtering flux of the first cross-flow filtration 〉=X) times, described cross-flow filtration system 1 switched to described the first cross-flow filtration from the second cross-flow filtration.Wherein, the inceptive filtering pressure setting of described the second cross-flow filtration is the X(2≤X≤6 of the inceptive filtering pressure of the first cross-flow filtration) doubly.In addition, the cross-flow filtration system also comprises for inject the fluid infusion system 104 of feed liquid to be filtered, filter element cleaning liquid and impurity lysate to cross-flow filtration system 1; Described fluid infusion system 104 has the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern of can be respectively injecting feed liquid to be filtered, filter element cleaning liquid and impurity lysate and can switching mutually in the described cross-flow filtration system 1; Described the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern coordinate execution (automatic or manual) with the first cross-flow filtration pattern, the non-filtration cleaning model of filter core and the second cross-flow filtration pattern respectively.concrete, as shown in Figure 2, described fluid infusion system 104 comprises deposits respectively feed liquid to be filtered, the first container 104a of filter element cleaning liquid and impurity lysate, second container 104b and the 3rd container 104c, described the first container 104a, second container 104b and the 3rd container 104c are respectively by the first liquid supplementation pipe, the second liquid supplementation pipe, the 3rd liquid supplementation pipe also is connected with the major cycle pipeline 105 of cross-flow filtration system 1 through fluid infusion pump 104d, described the first liquid supplementation pipe, be respectively equipped with the first control valve Kb1 on the second liquid supplementation pipe and the 3rd liquid supplementation pipe, the second control valve Kb2 and the 3rd control valve Kb3.In addition, described fluid infusion system 104 has the control system that automaticallyes switch between the first fluid infusion pattern that realizes, the second fluid infusion pattern and the 3rd fluid infusion pattern.
Embodiment
as shown in Figure 2, the cross-flow filtration system comprises major cycle pipeline 105, be respectively equipped with circulating pump 101 on this major cycle pipeline 105, cross-flow filter 102(adopts titanium-aluminium alloy porous material filter core), concentrate drain valve Kp, fluid infusion system, wherein, fluid infusion system 104 has and can inject feed liquid to be filtered respectively in major cycle pipeline 105, filter element cleaning liquid and impurity lysate and the first fluid infusion pattern that can switch mutually, the second fluid infusion pattern and the 3rd fluid infusion pattern, and also have in this cross-flow filtration system in the situation that do not change the liquid effects direction of circulating pump 101 make liquid can be respectively by the pipeline switched system of process first direction and the filter element filtering passage of second direction in cross-flow filter 102 opposite with described first direction, and clean liquid output and backwashing system.
described fluid infusion system specifically as shown in Figure 2, it comprises that depositing respectively feed liquid to be filtered (is specially sulfate liquor, represent with chemical formula MeSO4 in Fig. 2), filter element cleaning liquid (is specially water, represent with chemical formula H2O in Fig. 2) and the impurity lysate (be specially the pH value and be 1.5 to 5.0 sulfuric acid solution, represent with chemical formula H2SO4 in Fig. 2) the first container 104a, second container 104b and the 3rd container 104c, described the first container 104a, second container 104b and the 3rd container 104c are respectively by the first liquid supplementation pipe, the second liquid supplementation pipe, the 3rd liquid supplementation pipe also is connected with the major cycle pipeline 105 of cross-flow filtration system 1 through fluid infusion pump 104d, described the first liquid supplementation pipe, be respectively equipped with the first control valve Kb1 on the second liquid supplementation pipe and the 3rd liquid supplementation pipe, the second control valve Kb2 and the 3rd control valve Kb3.
Described pipeline switched system specifically as shown in Figure 2, it comprises bidirectional guide pipeline 103c, one-way guide flow pipeline 103d, the first triple valve K5 and the second triple valve K6, the end of bidirectional guide pipeline 103c is connected with the upper end of cross-flow filter 102, and the other end is connected with the first port of the second triple valve K6; The end of one-way guide flow pipeline 103d is connected with the lower end of cross-flow filter 102, and the other end is connected with second triple valve K6 the second port; The first port of the first triple valve K5 is connected with major cycle pipeline 105, and the second port is connected with bidirectional guide pipeline 103c, and the 3rd port is connected with the lower end of cross-flow filter 102; The 3rd port of the second triple valve K6 is connected with major cycle pipeline 105; The tie point of the lower end of one-way guide flow pipeline 103d and cross-flow filter 102 is on the connecting pipe between the lower end of the first triple valve K5 and cross-flow filter 102.
Described clean liquid output and backwashing system comprise the clean liquid output control valve Kj that is arranged on clean liquid output channel, are arranged on the counter-flushing liquid input control valve Kf on the counter-flushing liquid input channel, described clean liquid output channel is connected with the counter-flushing liquid input channel, also is connected with backflush device 106 on the counter-flushing liquid input channel.
During the first cross-flow filtration, the first control valve Kb1 opens, the second control valve Kb2 and the 3rd control valve Kb3 close, 104d injects sulfate liquor in major cycle pipeline 105 by the fluid infusion pump, sulfate liquor is subject to the effect of this circulating pump 101 and is realized the first cross-flow filtration by cross-flow filter 102, the clean liquid that filters enters in clean liquid storage tank by clean liquid output control valve Kj, concentrate is back in major cycle pipeline 105 through bidirectional guide pipeline 103c, can suitably open concentrate drain valve Kp discharge opeing when concentrate is too high.The inceptive filtering pressure setting of the first cross-flow filtration is 0.02Mpa, and the inceptive filtering flux is set as 600～800kg/m
2.h.Regularly with the clean liquid that filters, the filter core in cross-flow filter 102 is carried out backwash during the first cross-flow filtration, during backwash, counter-flushing liquid input control valve Kf opens and moves backflush device 106, namely clean liquid can be squeezed in cross-flow filter 102 fast; The backwash frequency setting is 600～960 seconds/time.
the first cross-flow filtration operation is after 24～48 hours, close the first control valve Kb1, clean liquid output control valve Kj, open concentrate drain valve Kp, after the sulfate liquor in system is emptying, open the second control valve Kb2, by fluid infusion pump 104d injected water in the major cycle pipeline 105, pass through the effect that water is subject to this circulating pump 101 filter element filtering passage in cross-flow filter 102 from lower to upper, and then through bidirectional guide pipeline 103c, the second triple valve K6 flows in major cycle pipeline 105, discharge from concentrate drain valve Kp at last, after the obvious impurity of nothing in the water of discharging from concentrate drain valve Kp, regulate the first triple valve K5 and the second triple valve K6, at this moment, originally the water that flows to cross-flow filter 102 lower ends enters after through the first triple valve K5 in bidirectional guide pipeline 103c and flows to cross-flow filter 102 upper ends, then from top to bottom by the filter element filtering passage, flow into major cycle pipeline 105 through the second triple valve K6 from one-way guide flow pipeline 103d again afterwards and discharge from concentrate drain valve Kp at last.After the obvious impurity of nothing in the water of discharging, close the second control valve Kb2 from concentrate drain valve Kp.
After this, open the 3rd control valve Kb3, clean liquid output control valve Kj, inject the pH value by fluid infusion pump 104d in the major cycle pipeline 105 and be 1.5 to 5.0 sulfuric acid solution,, sulfuric acid solution is subject to the effect of this circulating pump 101 and is realized the second cross-flow filtration by cross-flow filter 102.The inceptive filtering pressure setting of the first cross-flow filtration is 0.05Mpa, and regularly with the sulfuric acid solution that filters, the filter core in cross-flow filter 102 is carried out backwash, and the backwash frequency setting is 120～240 seconds/time.When the filtration flux of the second cross-flow filtration reaches 2000～2500kg/m
2.h the time, close the 3rd control valve Kb3, because sulfuric acid solution can not introduced impurity in sulfate liquor, therefore can directly open the first control valve Kb1 realizes that namely the second cross-flow filtration is to the switching of the first cross-flow filtration.
The present embodiment adopts physics and chemical method that titanium-aluminium alloy porous material filter core is cleaned in good time and regenerates, membrane flux is effectively restored, in reaching the filtration test of 6 months, the clear liquid flux of titanium-aluminium alloy porous material filter core in the sulfate filtration system still can keep initial value.
Claims (9)
1. have the cross-flow filtration system of filter core deep clean regeneration function, it is characterized in that, it has following mode of operation:
The first cross-flow filtration pattern, under described the first cross-flow filtration pattern, the feed liquid to be filtered that is injected in cross-flow filtration system (1) is subject to the effect of circulating pump (101) in this cross-flow filtration system (1) and is realized the first cross-flow filtration by cross-flow filter (102);
The non-filtration cleaning model of filter core, under the non-filtration cleaning model of described filter core, be injected into the filter element cleaning liquid of replacing feed liquid to be filtered in cross-flow filtration system (1) and be subject to the effect of circulating pump (101) in this cross-flow filtration system (1) and first process the filter element filtering passage in cross-flow filter (102), then discharge from cross-flow filtration system (1);
The second cross-flow filtration pattern, under described the second cross-flow filtration pattern, be injected into the impurity lysate of replacing filter element cleaning liquid in cross-flow filtration system (1) and be subject to the effect of circulating pump (101) in this cross-flow filtration system (1) and realized the second cross-flow filtration by cross-flow filter (102), and the impurity lysate that purifies from cross-flow filter (102) during the second cross-flow filtration regularly carries out backwash to the filter core in cross-flow filter (102);
Between above-mentioned the first cross-flow filtration pattern, the non-filtration cleaning model of filter core and the second cross-flow filtration pattern at least can according to from the first cross-flow filtration pattern to filter core non-filtration cleaning model, carry out one-way circulation from the non-filtration cleaning model of filter core to the second cross-flow filtration pattern, from the second cross-flow filtration pattern to the first cross-flow filtration pattern and switch.
2. the cross-flow filtration system with filter core deep clean regeneration function as claimed in claim 1 is characterized in that: have in described cross-flow filtration system (1) in the situation that do not change the liquid effects direction of circulating pump (101) make described filter element cleaning liquid can be respectively by the pipeline switched system of process first direction and the filter element filtering passage of second direction in cross-flow filter (102) opposite with described first direction.
3. the cross-flow filtration system with filter core deep clean regeneration function as claimed in claim 1 is characterized in that: the inceptive filtering pressure setting of described the second cross-flow filtration is the X(2≤X≤10 of the inceptive filtering pressure of the first cross-flow filtration) doubly; When the filtration flux of the second cross-flow filtration reached the Y(Y of the inceptive filtering flux of the first cross-flow filtration 〉=X) times, described cross-flow filtration system (1) switched to described the first cross-flow filtration from the second cross-flow filtration.
4. the cross-flow filtration system with filter core deep clean regeneration function as claimed in claim 3 is characterized in that: the inceptive filtering pressure setting of described the second cross-flow filtration is the X(2≤X≤6 of the inceptive filtering pressure of the first cross-flow filtration) doubly.
5. as claim 1,2,3 or 4 described cross-flow filtration systems with filter core deep clean regeneration function, it is characterized in that: also comprise for inject the fluid infusion system (104) of feed liquid to be filtered, filter element cleaning liquid and impurity lysate to cross-flow filtration system (1); Described fluid infusion system (104) has and can inject the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern that feed liquid to be filtered, filter element cleaning liquid and impurity lysate also can switch mutually respectively in described cross-flow filtration system (1); Described the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern coordinate execution with the first cross-flow filtration pattern, the non-filtration cleaning model of filter core and the second cross-flow filtration pattern respectively.
6. the cross-flow filtration system with filter core deep clean regeneration function as claimed in claim 5, it is characterized in that: described fluid infusion system (104) comprises deposits respectively feed liquid to be filtered, first container (104a) of filter element cleaning liquid and impurity lysate, second container (104b) and the 3rd container (104c), described the first container (104a), second container (104b) and the 3rd container (104c) are respectively by the first liquid supplementation pipe, the second liquid supplementation pipe, the 3rd liquid supplementation pipe also is connected with the major cycle pipeline (105) of cross-flow filtration system (1) through fluid infusion pump (104d), described the first liquid supplementation pipe, be respectively equipped with the first control valve (Kb1) on the second liquid supplementation pipe and the 3rd liquid supplementation pipe, the second control valve (Kb2) and the 3rd control valve (Kb3).
7. the cross-flow filtration system with filter core deep clean regeneration function as claimed in claim 5, it is characterized in that: described fluid infusion system (104) has the control system that automaticallyes switch between the first fluid infusion pattern that realizes, the second fluid infusion pattern and the 3rd fluid infusion pattern.
8. as claim 1,2,3 or 4 described cross-flow filtration systems with filter core deep clean regeneration function, it is characterized in that: described feed liquid to be filtered is sulfate liquor; Described filter element cleaning liquid is clear water, and described impurity lysate employing pH value is 1.5 to 5.0 sulfuric acid solution.
9. as claim 1,2,3 or 4 described cross-flow filtration systems with filter core deep clean regeneration function, it is characterized in that: the filter core in described cross-flow filter (102) is made of a kind of in titanium-aluminium alloy porous material, ferro-aluminum alloy porous material, nickel alumin(i)um alloy porous material.
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