CN103111121B - Cross flow filtration method of liquid - Google Patents
Cross flow filtration method of liquid Download PDFInfo
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- CN103111121B CN103111121B CN201210589926.XA CN201210589926A CN103111121B CN 103111121 B CN103111121 B CN 103111121B CN 201210589926 A CN201210589926 A CN 201210589926A CN 103111121 B CN103111121 B CN 103111121B
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Abstract
The invention discloses a cross flow filtration method of liquid, which is capable of deeply cleaning and regenerating a filter element. The method comprises the following steps of: injecting feed liquid to be filtered in a cross flow filter system, so that the feed liquid to be filtered realizes first cross flow filtration by a cross flow filter under the effect of a circulating pump in the cross flow filter system; injecting filter element washing liquid for replacing the feed liquid to be filtered in the cross flow filter system, so that the filter element washing liquid firstly passes through a filter element filtration channel inside the cross flow filter and then is discharged out from the cross flow filter system under the effect of the circulating pump in the cross flow filter system; and injecting impurity dissolution liquid for replacing the filter element washing liquid in the cross flow filter system, so that the impurity dissolution liquid realizes second cross flow filtration by the cross flow filter under the effect of the circulating pump in the cross flow filter system, wherein the filter element inside the cross flow filter is back-washed by using the impurity dissolution liquid purified out from the cross flow filter during the period of second cross flow filtration.
Description
Technical field
The present invention relates to a kind of cross-flow filtration method of liquid.
Background technology
Existing liquid cross-flow filtration mainly relies on backwash liquor periodically to recoil and realizes the clean regeneration of filter core, thus recovers filtration flux.But along with the lengthening of filtration time, depend merely on the thorough regeneration that this kind of renovation process can not realize filter core, thus affect the service life of filter core.
Summary of the invention
The present invention aims to provide a kind of cross-flow filtration method can carrying out the liquid of deep clean regeneration to filter core.
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, makes described feed liquid to be filtered be subject to the effect of circulating pump in this cross-flow filtration system and be realized the first cross-flow filtration by cross-flow filter; The filter element cleaning liquid replacing feed liquid to be filtered is injected 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 from the filter element filtering passage in cross-flow filter, then discharge from cross-flow filtration system; The impurities dissolves liquid replacing filter element cleaning liquid is injected in described cross-flow filtration system, make described impurities dissolves liquid 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, during the second cross-flow filtration, with the impurities dissolves liquid that cross-flow filter purifies, backwash is carried out 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 first cross-flow filtration from the second cross-flow filtration.
Be further, first make described filter element cleaning liquid by first direction from the filter element filtering passage in cross-flow filter through discharging cross-flow filtration system later, then make described filter element cleaning liquid by second direction opposite to the first direction from the filter element filtering passage in cross-flow filter through discharging cross-flow filtration system later.
Further, have in described cross-flow filtration system and to enable the described filter element cleaning liquid pipeline switched system of process from the filter element filtering passage in cross-flow filter by first direction and second direction respectively when not changing the liquid effects direction of circulating pump.
Further, the inceptive filtering pressure setting of described second cross-flow filtration is 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 >=X of the inceptive filtering flux of the first cross-flow filtration) times time, described cross-flow filtration system is switched to described first cross-flow filtration from the second cross-flow filtration.
Further, the inceptive filtering pressure setting of described second cross-flow filtration is 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; Then described filter element cleaning liquid is clear water, and described impurities dissolves liquid adopts pH value to be the sulfuric acid solution of 1.5 to 5.0.
Further, the filter core in described cross-flow filter is made up of the one in titanium-aluminium alloy porous material, ferro-aluminum alloy porous material, nickel alumin(i)um alloy porous material.
Further, in described cross-flow filtration system, feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid is injected by fluid infusion system; Described fluid infusion system has can respectively to injecting feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid in described cross-flow filtration system and the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern that can switch mutually.
Be further, described fluid infusion system comprises the first container, second container and the 3rd container of depositing feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid respectively, described first container, second container and the 3rd container, respectively by the first liquid supplementation pipe, the second liquid supplementation pipe, the 3rd liquid supplementation pipe being connected with the major cycle pipeline of cross-flow filtration system through fluid infusion pump, described first liquid supplementation pipe, the second liquid supplementation pipe and the 3rd liquid supplementation pipe are respectively equipped with the first control valve, the second control valve and the 3rd control valve.
Further, the first fluid infusion pattern, automatic switchover between the second fluid infusion pattern and the 3rd fluid infusion pattern is realized by control system.
Further, with backwash medium, backwash is carried out to the filter core in cross-flow filter during the first cross-flow filtration.
First above-mentioned cross-flow filtration method of the present invention is rinsed filter element filtering passage by filter element cleaning liquid, thus the moveable impurity of major part on removing filter core; Secondly, by the filtration to impurities dissolves liquid, with the impurities dissolves liquid filtered out, backwash is carried out to filter core, take out of with impurities dissolves liquid after the deep level impurity being difficult to be rinsed can being dissolved in filter core.Therefore, said method achieves and regenerates the deep clean of filter core, increases 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, and under described first cross-flow filtration pattern, the feed liquid to be filtered be injected in cross-flow filtration system 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; Filter core non-filtered cleaning model, under described filter core non-filtered cleaning model, be injected into the filter element cleaning liquid replacing feed liquid to be filtered in cross-flow filtration system and be subject to the effect of circulating pump in this cross-flow filtration system and first process from the filter element filtering passage in cross-flow filter, then discharge from cross-flow filtration system; Second cross-flow filtration pattern, under described second cross-flow filtration pattern, be injected into the impurities dissolves liquid replacing filter element cleaning liquid in cross-flow filtration system 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 impurities dissolves liquid timing purified from cross-flow filter during the second cross-flow filtration carries out backwash to the filter core in cross-flow filter; At least can according to from the first cross-flow filtration pattern to filter core non-filtered cleaning model, from filter core non-filtered cleaning model to the second cross-flow filtration pattern, carry out one-way circulation switching from the second cross-flow filtration pattern to the first cross-flow filtration pattern between above-mentioned first cross-flow filtration pattern, filter core non-filtered cleaning model and the second cross-flow filtration pattern.
Further, have in described cross-flow filtration system and to enable the described filter element cleaning liquid pipeline switched system of process from the filter element filtering passage in cross-flow filter by first direction and second direction opposite to the first direction respectively when not changing the liquid effects direction of circulating pump.
Further, the inceptive filtering pressure setting of described 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 reaches the Y(Y >=X of the inceptive filtering flux of the first cross-flow filtration) times time, described cross-flow filtration system switches to described first cross-flow filtration from the second cross-flow filtration.
Further, the inceptive filtering pressure setting of described second cross-flow filtration is X(2≤X≤6 of the inceptive filtering pressure of the first cross-flow filtration) doubly.
Further, the fluid infusion system for injecting feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid in cross-flow filtration system is also comprised; Described fluid infusion system has can respectively to injecting feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid in described cross-flow filtration system and the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern that can switch mutually; Described first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern coordinate with the first cross-flow filtration pattern, filter core non-filtered cleaning model and the second cross-flow filtration pattern respectively and perform.
Be further, described fluid infusion system comprises the first container, second container and the 3rd container of depositing feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid respectively, described first container, second container and the 3rd container, respectively by the first liquid supplementation pipe, the second liquid supplementation pipe, the 3rd liquid supplementation pipe being connected with the major cycle pipeline of cross-flow filtration system through fluid infusion pump, described first liquid supplementation pipe, the second liquid supplementation pipe and the 3rd liquid supplementation pipe are respectively equipped with the first control valve, the second control valve and the 3rd control valve.
Further, described fluid infusion system has the control system realizing the first fluid infusion pattern, automatically switch between the second fluid infusion pattern and the 3rd fluid infusion pattern.
Described feed liquid to be filtered is sulfate liquor; Then described filter element cleaning liquid is clear water, and described impurities dissolves liquid adopts pH value to be the sulfuric acid solution of 1.5 to 5.0.
Further, the filter core in described cross-flow filter is made up of the one in titanium-aluminium alloy porous material, ferro-aluminum alloy porous material, nickel alumin(i)um alloy porous material.
First above-mentioned cross-flow filtration system of the present invention is rinsed filter element filtering passage by filter element cleaning liquid, thus the moveable impurity of major part on removing filter core; Secondly, by the filtration to impurities dissolves liquid, with the impurities dissolves liquid filtered out, backwash is carried out to filter core, take out of with impurities dissolves liquid after the deep level impurity being difficult to be rinsed can being dissolved in filter core.Therefore, this cross-flow filtration system achieves and regenerates the deep clean of filter core, increases filter core service life.
Below in conjunction with the drawings and specific embodiments, the present invention is described further.The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of cross-flow filtration system of the present invention.
Fig. 2 is the structural representation of the cross-flow filtration system of the embodiment of the present invention.
Detailed description of the invention
First point out, term " stoste " involved in the present invention, " concentrate " and " clean liquid " are all the technical terms in cross-flow filtration field.Wherein, " stoste " is the liquid preparing to filter; " concentrate " refers to by cross-flow filter but non-liquid being filtered; 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, makes described feed liquid to be filtered be subject to the effect of circulating pump 101 in this cross-flow filtration system 1 and be realized the first cross-flow filtration by cross-flow filter 102; The filter element cleaning liquid replacing feed liquid to be filtered is injected 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 from the filter element filtering passage in cross-flow filter 102, then discharge from cross-flow filtration system 1; The impurities dissolves liquid replacing filter element cleaning liquid is injected in described cross-flow filtration system 1, make described impurities dissolves liquid be subject to the effect of circulating pump 101 in this cross-flow filtration system 1 and be realized the second cross-flow filtration by cross-flow filter 102, during the second cross-flow filtration, with the impurities dissolves liquid that cross-flow filter 102 purifies, backwash is carried out to the filter core 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 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 to make filter element cleaning liquid only flow through from filter element filtering passage, only need to close the valve that the clean liquid output channel of cross-flow filter 102 is just provided with originally.In addition, the major cycle pipeline 105 of existing cross-flow filtration system 1 itself is also provided with concentrate drain valve Kp, those skilled in the art are also fully aware of, in order to the concentrate produced when filter element cleaning liquid and the first cross-flow filtration, the second cross-flow filtration is discharged from cross-flow filtration system 1, as long as open described concentrate drain valve Kp.In addition, in order to dissolved impurity, impurities dissolves liquid can adopt the corrosive solutions such as strong acid usually.Therefore, the present invention advises that the filter core in described cross-flow filter 102 adopts the one in the exsertile titanium-aluminium alloy porous material of corrosion resistance, ferro-aluminum alloy porous material, nickel alumin(i)um alloy porous material to form.
State on the invention in method, after utilizing filter element cleaning liquid to rinse filter element filtering passage, can remove the moveable impurity of major part on filter core, the such as long period filters and slag of deposition etc.The application inventor carried out test of many times with regard to using filter element cleaning liquid to carry out flushing to filter element filtering passage, inventor finds, as shown in Figure 1, when make always described filter element cleaning liquid by first direction D1 from the filter element filtering passage in cross-flow filter 102 through out-of-date, the filter element cleaning liquid discharged from concentrate drain valve Kp can gradually from relatively dirty state transfer be relatively limpid state; But, if now make described filter element cleaning liquid pass through from the filter element filtering passage in cross-flow filter 102 by the second direction D2 contrary with described first direction D1 again, then still exist from the filter element cleaning liquid that concentrate drain valve Kp discharges and change to relatively limpid state from relatively dirty state, this illustrates, the effect of one direction cleaning does not reach optimal cleaning performance.Therefore, the present invention further have employed first make described filter element cleaning liquid by first direction D1 from the filter element filtering passage in cross-flow filter 102 through discharging cross-flow filtration system 1 later, make again described filter element cleaning liquid by the second direction D2 contrary with described first direction D1 from the filter element filtering passage in cross-flow filter 102 through discharging the technological means of cross-flow filtration system 1 later, thus improve 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 concentrate output.
Above-mentioned bi-directional filtered in order to realize, more mode can be adopted realize.Such as, the installation direction of circulating pump 101 can be changed, or use the circulating pump 101 that two switchable installation directions are contrary, or the pipeline before and after cross-flow filter 102 is transformed etc.Obviously, these modes above-mentioned all extremely bother, and the possibility industrially applied is very little.To this, as shown in Figure 1, also have in described cross-flow filtration system 1 of the present invention and enable described filter element cleaning liquid respectively by the pipeline switched system 103 of first direction D1 and second direction D2 process from the filter element filtering passage in cross-flow filter 102 when not changing the liquid effects direction of circulating pump 101.As a kind of concrete structure of 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 first diversion pipeline 103a and major cycle pipeline 105 lays respectively at the two ends of cross-flow filter 102, the second diversion pipeline 103b two ends that lay respectively at cross-flow filter 102 same with the tie point of major cycle pipeline 105, at the tie point of the first diversion pipeline 103a and major cycle pipeline 105 and be respectively equipped with valve K1 between the second diversion pipeline 103b and the tie point of major cycle pipeline 105 on described major cycle pipeline 105, K2, first diversion pipeline 103a and the second diversion pipeline 103b is respectively equipped with valve K3, K4.For above-mentioned pipeline switched system 103, to make filter element cleaning liquid by first direction D1 by cross-flow filter 102, only need Open valve K1, K2, valve-off K3, K4; To make filter element cleaning liquid by second direction D2 by cross-flow filter 102, only need Open valve K3, K4, valve-off K1, K2.
State on the invention in method, in order to improve the deep clean effect to filter core further, the inceptive filtering pressure setting of described second cross-flow filtration is 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 >=X of the inceptive filtering flux of the first cross-flow filtration) times time, described cross-flow filtration system (1) is switched to described first cross-flow filtration from the second cross-flow filtration.Be X(2≤X≤10 of the inceptive filtering pressure of the first cross-flow filtration by the inceptive filtering pressure setting of the second cross-flow filtration) doubly, be to impel impurities dissolves liquid can to try one's best many penetrating in the duct of filter core under larger pressure, thus the impurity particle in blocking duct is disposed as much as possible.When 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 illustrate that filter core regeneration effect is poor, and filter core is seriously polluted.Therefore, the present invention is just 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 basis doubly, the filtration flux of the second cross-flow filtration is reached the Y(Y >=X of the inceptive filtering flux of the first cross-flow filtration) doubly as prerequisite cross-flow filtration system (1) being switched to described first cross-flow filtration from the second cross-flow filtration, thus strainability when making the filter element filtering performance after purifying regeneration substantially reach the use of filter core initial stage.On the basis of technique scheme, the inceptive filtering pressure setting of described second cross-flow filtration is X(2≤X≤6 of the inceptive filtering pressure of the first cross-flow filtration) be doubly advisable.
As shown in Figure 1, in said method of the present invention, be in described cross-flow filtration system 1, inject feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid by fluid infusion system 104; Described fluid infusion system 104 has can respectively to injecting feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid in described cross-flow filtration system 1 and the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern that can switch mutually.First fluid infusion pattern, switching between the second fluid infusion pattern and the 3rd fluid infusion pattern both can be realized by artificial completely, can certainly realize the first fluid infusion pattern, automatic switchover between the second fluid infusion pattern and the 3rd fluid infusion pattern by control system.Specifically, as shown in Figure 2, described fluid infusion system 104 comprises deposits feed liquid to be filtered respectively, first container 104a of filter element cleaning liquid and impurities dissolves liquid, second container 104b and the 3rd container 104c, described first container 104a, second container 104b and the 3rd container 104c is respectively by the first liquid supplementation pipe, second liquid supplementation pipe, 3rd liquid supplementation pipe is also connected with the major cycle pipeline 105 of cross-flow filtration system 1 through fluid infusion pump 104d, described first liquid supplementation pipe, second liquid supplementation pipe and the 3rd liquid supplementation pipe are respectively equipped with the first control valve Kb1, second control valve Kb2 and the 3rd control valve Kb3.If realize the first fluid infusion pattern, automatic switchover between the second fluid infusion pattern and the 3rd fluid infusion pattern, only need automatically to be controlled 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, a kind of cross-flow filtration system with filter core deep clean regeneration function is provided below, as shown in Figure 1, it has following mode of operation: the first cross-flow filtration pattern, under described first cross-flow filtration pattern, the feed liquid to be filtered be 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; Filter core non-filtered cleaning model, under described filter core non-filtered cleaning model, be injected into the filter element cleaning liquid 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 from the filter element filtering passage in cross-flow filter 102, then discharge from cross-flow filtration system 1; Second cross-flow filtration pattern, under described second cross-flow filtration pattern, be injected into the impurities dissolves liquid replacing filter element cleaning liquid in cross-flow filtration system 1 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 impurities dissolves liquid timing purified from cross-flow filter 102 during the second cross-flow filtration carries out backwash to the filter core in cross-flow filter 102; At least can according to from the first cross-flow filtration pattern to filter core non-filtered cleaning model, from filter core non-filtered cleaning model to the second cross-flow filtration pattern, carry out one-way circulation switching from the second cross-flow filtration pattern to the first cross-flow filtration pattern between above-mentioned first cross-flow filtration pattern, filter core non-filtered cleaning model and the second cross-flow filtration pattern.Obviously, namely the switching between the first cross-flow filtration pattern, filter core non-filtered cleaning model and the second cross-flow filtration pattern by manually completing, also can realize automatic control.Wherein, the filter core in described cross-flow filter 102 is made up of the one 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 and to enable the described filter element cleaning liquid pipeline switched system of process from the filter element filtering passage in cross-flow filter 102 by first direction and second direction opposite to the first direction respectively when not changing the liquid effects direction of circulating pump 101.In addition, the inceptive filtering pressure setting of described second cross-flow filtration is 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 >=X of the inceptive filtering flux of the first cross-flow filtration) times time, described cross-flow filtration system 1 switches to described first cross-flow filtration from the second cross-flow filtration.Wherein, the inceptive filtering pressure setting of described second cross-flow filtration is X(2≤X≤6 of the inceptive filtering pressure of the first cross-flow filtration) doubly.In addition, cross-flow filtration system also comprises the fluid infusion system 104 for injecting feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid in cross-flow filtration system 1; Described fluid infusion system 104 has can respectively to injecting feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid in described cross-flow filtration system 1 and the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern that can switch mutually; Described first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern coordinate with the first cross-flow filtration pattern, filter core non-filtered cleaning model and the second cross-flow filtration pattern respectively and perform (automatic or manual).Concrete, as shown in Figure 2, described fluid infusion system 104 comprises deposits feed liquid to be filtered respectively, first container 104a of filter element cleaning liquid and impurities dissolves liquid, second container 104b and the 3rd container 104c, described first container 104a, second container 104b and the 3rd container 104c is respectively by the first liquid supplementation pipe, second liquid supplementation pipe, 3rd liquid supplementation pipe is also connected with the major cycle pipeline 105 of cross-flow filtration system 1 through fluid infusion pump 104d, described first liquid supplementation pipe, second liquid supplementation pipe and the 3rd liquid supplementation pipe are respectively equipped with the first control valve Kb1, second control valve Kb2 and the 3rd control valve Kb3.In addition, described fluid infusion system 104 has the control system realizing the first fluid infusion pattern, automatically switch between the second fluid infusion pattern and the 3rd fluid infusion pattern.
Embodiment
As shown in Figure 2, cross-flow filtration system comprises major cycle pipeline 105, this major cycle pipeline 105 is respectively equipped with circulating pump 101, 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, the first fluid infusion pattern that filter element cleaning liquid and impurities dissolves liquid also can switch mutually, second fluid infusion pattern and the 3rd fluid infusion pattern, and also have in this cross-flow filtration system and to enable the liquid pipeline switched system of process from the filter element filtering passage in cross-flow filter 102 by first direction and second direction opposite to the first direction respectively when not changing the liquid effects direction of circulating pump 101, and clean liquid exports and backwashing system.
Described fluid infusion system is concrete as shown in Figure 2, it comprises deposits feed liquid to be filtered respectively and (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 impurities dissolves liquid (be specially the sulfuric acid solution that pH value is 1.5 to 5.0, represent with chemical formula H2SO4 in Fig. 2) the first container 104a, second container 104b and the 3rd container 104c, described first container 104a, second container 104b and the 3rd container 104c is respectively by the first liquid supplementation pipe, second liquid supplementation pipe, 3rd liquid supplementation pipe is also connected with the major cycle pipeline 105 of cross-flow filtration system 1 through fluid infusion pump 104d, described first liquid supplementation pipe, second liquid supplementation pipe and the 3rd liquid supplementation pipe are respectively equipped with the first control valve Kb1, second control valve Kb2 and the 3rd control valve Kb3.
Described pipeline switched system is concrete 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, one end of bidirectional guide pipeline 103c is connected with the upper end of cross-flow filter 102, and the other end is connected with first port of the second triple valve K6; One 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 the second triple valve K6 second port; 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; 3rd port of the second triple valve K6 is connected with major cycle pipeline 105; In the tie point of the lower end of one-way guide flow pipeline 103d and cross-flow filter 102 connecting pipe between the first triple valve K5 and the lower end of cross-flow filter 102.
Described clean liquid exports and backwashing system comprises the clean liquid output control valve Kj be arranged on clean liquid output channel, the counter-flushing liquid input control valve Kf be arranged on counter-flushing liquid input channel, described clean liquid output channel is connected with counter-flushing liquid input channel, and counter-flushing liquid input channel is also connected with backflush device 106.
During the first cross-flow filtration, first control valve Kb1 opens, second control valve Kb2 and the 3rd control valve Kb3 closes, in major cycle pipeline 105, sulfate liquor is injected by fluid infusion pump 104d, 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 filtered 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, suitably can 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 inceptive filtering flux set is 600 ~ 800kg/m
2.h.The clean liquid that during first cross-flow filtration, timing is filtered carries out backwash to the filter core in cross-flow filter 102, and during backwash, counter-flushing liquid input control valve Kf opens and runs backflush device 106, namely can squeeze in cross-flow filter 102 fast by clean liquid; Backwash frequency setting is 600 ~ 960 seconds/time.
After first cross-flow filtration runs 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, in major cycle pipeline 105, water is injected by fluid infusion pump 104d, the effect that water is subject to this circulating pump 101 passing through from the filter element filtering passage in cross-flow filter 102 from lower to upper, and then through bidirectional guide pipeline 103c, second triple valve K6 flows in major cycle pipeline 105, finally discharge from concentrate drain valve Kp, after in the water of discharging from concentrate drain valve Kp without obvious impurity, regulate the first triple valve K5 and the second triple valve K6, at this moment, originally to enter after the first triple valve K5 in bidirectional guide pipeline 103c to the water of cross-flow filter 102 lower end flowing and flow to cross-flow filter 102 upper end, then from top to bottom by filter element filtering passage, finally discharge from concentrate drain valve Kp through the second triple valve K6 inflow major cycle pipeline 105 from one-way guide flow pipeline 103d again afterwards.After in the water of discharging from concentrate drain valve Kp without obvious impurity, close the second control valve Kb2.
After this, open the 3rd control valve Kb3, clean liquid output control valve Kj, in major cycle pipeline 105, the sulfuric acid solution that pH value is 1.5 to 5.0 is injected by fluid infusion pump 104d, 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 the sulfuric acid solution that timing is filtered carries out backwash to the filter core in cross-flow filter 102, and backwash frequency setting is 120 ~ 240 seconds/time.When the filtration flux of the second cross-flow filtration reaches 2000 ~ 2500kg/m
2.h, time, close the 3rd control valve Kb3, because sulfuric acid solution can not introduce impurity in sulfate liquor, therefore directly can open the first control valve Kb1 and namely realize the switching of the second cross-flow filtration to the first cross-flow filtration.
The present embodiment adopts physics and chemical method clean in good time titanium-aluminium alloy porous material filter core and regenerate, membrane flux is effectively restored, in the filtration test reaching 6 months, the clear liquid flux of titanium-aluminium alloy porous material filter core in sulfate filtration system still can keep initial value.
Claims (6)
1. the cross-flow filtration method of liquid, the step comprised 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 be realized the first cross-flow filtration by cross-flow filter (102), during the first cross-flow filtration, with backwash medium, backwash is carried out to the filter core in cross-flow filter (102);
The filter element cleaning liquid replacing feed liquid to be filtered is injected in described cross-flow filtration system (1), described filter element cleaning liquid is made to be subject to the effect of circulating pump (101) in this cross-flow filtration system (1) and first to enter in cross-flow filter (102) from the stoste input of cross-flow filter (102) or concentrate output and pass through from filter element filtering passage, discharge from cross-flow filtration system (1) again, first make described filter element cleaning liquid by first direction (D1) from the filter element filtering passage in cross-flow filter (102) through discharging cross-flow filtration system (1) later, make again described filter element cleaning liquid by the second direction (D2) contrary with described first direction (D1) from the filter element filtering passage in cross-flow filter (102) through discharging cross-flow filtration system (1) later,
The impurities dissolves liquid replacing filter element cleaning liquid is injected in described cross-flow filtration system (1), make described impurities dissolves liquid be subject to the effect of circulating pump (101) in this cross-flow filtration system (1) and be realized the second cross-flow filtration by cross-flow filter (102), during the second cross-flow filtration, with the impurities dissolves liquid that cross-flow filter (102) purifies, backwash is carried out to the filter core 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 first cross-flow filtration from the second cross-flow filtration;
In described cross-flow filtration system (1), feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid is injected by fluid infusion system (104); Described fluid infusion system (104) has can respectively to injecting feed liquid to be filtered, filter element cleaning liquid and impurities dissolves liquid in described cross-flow filtration system (1) and the first fluid infusion pattern, the second fluid infusion pattern and the 3rd fluid infusion pattern that can switch mutually;
Described fluid infusion system (104) comprises deposits feed liquid to be filtered respectively, first container (104a) of filter element cleaning liquid and impurities dissolves liquid, second container (104b) and the 3rd container (104c), described first container (104a), second container (104b) and the 3rd container (104c) are respectively by the first liquid supplementation pipe, second liquid supplementation pipe, 3rd liquid supplementation pipe is also connected with the major cycle pipeline (105) of cross-flow filtration system (1) through fluid infusion pump (104d), described first liquid supplementation pipe, second liquid supplementation pipe and the 3rd liquid supplementation pipe are respectively equipped with the first control valve (Kb1), second control valve (Kb2) and the 3rd control valve (Kb3).
2. the cross-flow filtration method of liquid as claimed in claim 1, is characterized in that: have in described cross-flow filtration system (1) and to enable the described filter element cleaning liquid pipeline switched system (103) of process from the filter element filtering passage in cross-flow filter (102) by first direction (D1) and second direction (D2) respectively when not changing the liquid effects direction of circulating pump (101).
3. the cross-flow filtration method of liquid as claimed in claim 1 or 2, is characterized in that: the inceptive filtering pressure setting of described second cross-flow filtration is X times of the inceptive filtering pressure of the first cross-flow filtration, wherein 2≤X≤10; When the filtration flux of the second cross-flow filtration reaches the Y of the inceptive filtering flux of the first cross-flow filtration doubly, wherein during Y >=X, described cross-flow filtration system (1) is switched to described first cross-flow filtration from the second cross-flow filtration.
4. the cross-flow filtration method of liquid as claimed in claim 1 or 2, is characterized in that: described feed liquid to be filtered is sulfate liquor; Then described filter element cleaning liquid is clear water, and described impurities dissolves liquid adopts pH value to be the sulfuric acid solution of 1.5 to 5.0.
5. the cross-flow filtration method of liquid as claimed in claim 1 or 2, is characterized in that: the filter core in described cross-flow filter (102) is made up of the one in titanium-aluminium alloy porous material, ferro-aluminum alloy porous material, nickel alumin(i)um alloy porous material.
6. the cross-flow filtration method of liquid as claimed in claim 1, is characterized in that: realize the first fluid infusion pattern, automatic switchover between the second fluid infusion pattern and the 3rd fluid infusion pattern by control system.
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| CN201210589926.XA CN103111121B (en) | 2012-12-29 | 2012-12-29 | Cross flow filtration method of liquid |
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| CN103111121B true CN103111121B (en) | 2015-05-13 |
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| CN104056489B (en) * | 2014-03-31 | 2016-08-17 | 成都易态科技有限公司 | The cross flow filter method of solution of metal sulfates |
| CN109847444B (en) * | 2019-01-14 | 2023-11-10 | 昊姆（上海）节能科技有限公司 | Solution backheating generation and purification system |
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| CN201249106Y (en) * | 2008-08-22 | 2009-06-03 | 天津膜天膜工程技术有限公司 | Chemical cleaning device of hollow fiber filter membrane |
| CN201643834U (en) * | 2009-12-25 | 2010-11-24 | 成都易态科技有限公司 | Filter element assembly for cross-flow filter |
| CN202036850U (en) * | 2011-04-02 | 2011-11-16 | 成都易态科技有限公司 | Cross flow filter equipment with multiple working modes |
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| FR2798865B1 (en) * | 1999-09-23 | 2001-11-16 | Degremont | IMPROVEMENTS ON GRANULAR MATERIAL BED FILTERS, ESPECIALLY FOR WATER TREATMENT |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201249106Y (en) * | 2008-08-22 | 2009-06-03 | 天津膜天膜工程技术有限公司 | Chemical cleaning device of hollow fiber filter membrane |
| CN201643834U (en) * | 2009-12-25 | 2010-11-24 | 成都易态科技有限公司 | Filter element assembly for cross-flow filter |
| CN202036850U (en) * | 2011-04-02 | 2011-11-16 | 成都易态科技有限公司 | Cross flow filter equipment with multiple working modes |
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