CN1751770A - Cleaning method for vacuum filter and vacuum filter - Google Patents
Cleaning method for vacuum filter and vacuum filter Download PDFInfo
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- CN1751770A CN1751770A CNA2004100925935A CN200410092593A CN1751770A CN 1751770 A CN1751770 A CN 1751770A CN A2004100925935 A CNA2004100925935 A CN A2004100925935A CN 200410092593 A CN200410092593 A CN 200410092593A CN 1751770 A CN1751770 A CN 1751770A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/44—Regenerating the filter material in the filter
- B01D33/46—Regenerating the filter material in the filter by scrapers, brushes nozzles or the like acting on the cake-side of the filtering element
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
- B01D33/60—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for washing
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Abstract
To provide a washing method of a vacuum filtration apparatus that is capable of smoothly removing crystal deposited and adhered to a filter cloth and grid plate in suitable timing to surely prevent the clogging and the blocking of a filtrate stream space. The washing method of the vacuum filtration apparatus comprises supplying a tray washing liquid into a vacuum tray based on the vacuum pressure of vacuum line 20 in the vacuum trays 16A-16E and washing the vacuum trays by immersing the inside of the vacuum tray. Also a vacuum filtration apparatus is provided.
Description
Technical field
The cleaning method and the vacuum apparatus of the vacuum apparatus of the slip on the filter cloth that the vacuum pallet that the present invention relates to a kind of below by being located at filter cloth comes vacuum attraction to filter to supply to can approximate horizontal to move.
Background technology
By filter operation, carry out separating the purification operations that mother liquor takes out crystallised component or makes the crystallised component purifying from slip.For example, when taking out as crystallization, in the past, utilized centrifugal separator, continuous filter or horizontal pallet filter etc. to carry out separate the organic crystallised component be dissolved in the solvent from mother liquor.At this moment, the liquid that contains crystallised component is saturated solution, in addition, when the operation beginning, the going up of filter cloth and the vacuum pallet that is in contact with it facial (web plate), generally be in the normal temperature state lower than operating temperature, and according to reasons such as the member by the big thermal capacity with heat condition of controlling slip constitute, aforesaid liquid is cooled in contact the process that reaches by it with cake layer or filter cloth, cause that crystallization separates out, particularly crystallization produces the obturation in eyelet obstruction or filtrate flows space attached to the perforate eye or the foot of the perforate eye or the above-mentioned web plate of filter cloth.So phenomenon is at batch (-type) or in continous way generation to be arranged all, reduces filter capacity greatly, and the result has to the low crystallization of purity, and yield rate reduces.Therefore, need regularly carry out the cleaning of filter cloth or web plate, the result causes the reduction of running rate.In addition, problem so when the crystallization of the slip of eutectic system or solid solution refining, also occurs under the situation of carrying out above-mentioned mechanical filter operation.
In addition, the temperature difference that temperature is separated out in the solution temperature of the organic crystallization in being dissolved in solvent and crystallization less than 10 ℃ with separate dissolved temperature in interior or from mother liquor when the crystallised component below 30 ℃ takes out as crystallization, for example, shown in following patent documentation 1, can utilize special filter medium structure to address the above problem, but the crystallised component under the temperature conditions beyond above-mentioned exists device complicated, the problem that cost of equipment increases.
As the scheme that overcomes the above problems, for example, shown in following patent documentation 2, utilization is located at the vacuum pallet of filter cloth back side portion, via above-mentioned filter cloth, the liquid that will contain crystallised component further is separated in the cleaning method of vacuum apparatus of crystallised component and mother liquor, disclose on the partial vacuum pallet, to the back side of above-mentioned filter cloth portion supply tray cleaning fluid and it is full of, the crystallization of deposition attached to the back side portion of this filter cloth reclaimed in dissolving, other vacuum pallet forms as filter cake and uses simultaneously, filter cake cleans to be used, take off liquid with operating, by each vacuum pallet being carried out same operation, the method for cleaning.
Patent documentation 1: the spy opens flat 2-126902 communique
Patent documentation 2: specially permit communique No. 3497206
But, as mentioned above, separating the organic crystallised component that is dissolved in the solvent from mother liquor, when taking out etc. as crystallization, above-mentioned vacuum apparatus, multiform becomes the formation that will above-mentioned a plurality of vacuum pallets all be accommodated in the closed chamber and cuts off with the outside, under situation so, be difficult to by above-mentioned closed chamber accurately the deposition of the above-mentioned crystallization on the above-mentioned web plate of assurance and the filter cloth adhere to situation.Therefore, have to be set in through back between the predetermined operating period to the timing of the back side of above-mentioned filter cloth portion supply tray cleaning fluid.; in such cases; for example because of the change of the operational situation of vacuum apparatus etc., even in same timing, the situation that above-mentioned deposition is adhered to is also different; even be under the state that filter cloth and web plate also do not need to clean; also implement to clean, on the contrary, although be in the state that needs cleaning; but also do not implement sometimes to clean, have the problem that is difficult to implement above-mentioned cleaning by suitable timing.In addition, if the constant time lag of cleaning, the filter capacity of vacuum apparatus reduces, and produces to clean bad or to take off liquid bad, and the worry that reduces product property is arranged, in addition, if the timing advance of cleaning can be wasted cleaning fluid.
Summary of the invention
The present invention, so proposing under the background, its objective is that providing a kind of can remove deposition attached to the crystallization on filter cloth or the web plate smoothly by suitable timing, prevent that really eyelet from stopping up or the cleaning method and the vacuum apparatus of the vacuum apparatus of the obturation in filtrate flows space.
Problem realizes above-mentioned purpose in order to solve so, the cleaning method of vacuum apparatus of the present invention, be can approximate horizontal be located at movably filter cloth on the device body below the vacuum pallet that Jie is linked with vacuum suction device by vacuum line is set, utilize above-mentioned vacuum pallet to be situated between and supply to slip on this filter cloth by above-mentioned filter cloth vacuum attraction, thereby the cleaning method of the vacuum apparatus that filters, it is characterized in that: the vacuum according to above-mentioned vacuum line is pressed, supply tray cleaning fluid in above-mentioned vacuum pallet, the pallet cleaning fluid is immersed in this vacuum pallet, cleans this vacuum pallet.
In addition, vacuum apparatus of the present invention, be can approximate horizontal be located at movably filter cloth on the device body below, moving direction along above-mentioned filter cloth, the vacuum pallet that a plurality of Jie are linked with vacuum suction device by vacuum line is set, utilize above-mentioned vacuum pallet to be situated between and supply to slip on this filter cloth by above-mentioned filter cloth vacuum attraction, thereby the vacuum apparatus that filters, it is characterized in that: on the above-mentioned vacuum line at least 1 vacuum pallet in above-mentioned a plurality of vacuum pallets, the vacuum with vacuum pressure of measuring in the above-mentioned vacuum line is pressed mensuration mechanism, has cleaning solution supplying mechanism simultaneously to these vacuum pallet supply tray cleaning fluids; Measure the vacuum that mechanism measures and press according to pressing, utilize above-mentioned cleaning solution supplying mechanism, the pallet cleaning fluid is immersed in this vacuum pallet, clean this vacuum pallet to above-mentioned vacuum pallet supply tray cleaning fluid by above-mentioned vacuum.
If adopt above-mentioned invention, because the vacuum according to above-mentioned vacuum line is pressed, determine to supply with the timing of cleaning fluid to the vacuum pallet, although so changes such as operational situation of vacuum apparatus, the deposition of the crystallised component that also can accurately hold slip on web plate of vacuum pallet etc. adhered to situation, can implement the cleaning of this web plate etc. by suitable timing.That is, if because the adhesion amount of crystallised component on above-mentioned web plate etc. is big, then above-mentioned vacuum is pressed and is increased, if above-mentioned adhesion amount is few, then above-mentioned vacuum is forced down, therefore can above-mentioned vacuum press surpass setting, for example-carry out above-mentioned cleaning during 40kPaG.Thus, can prevent because of take place to clean bad or take off the reduction of the bad product property that causes of liquid and the waste of cleaning fluid.
Here, preferred: as on the moving direction of above-mentioned filter cloth, to be provided with a plurality of above-mentioned vacuum pallets, to press, clean these vacuum pallets according to the vacuum of the above-mentioned vacuum line at least 1 vacuum pallet in these a plurality of vacuum pallets.In addition, preferred: the above-mentioned vacuum line vacuum of measuring on a plurality of above-mentioned vacuum pallets is separately pressed, and only cleans vacuum and presses the above-mentioned vacuum pallet that surpasses setting.
In these cases, the vacuum pallet that can only clean needs cleans, and can prevent the waste of cleaning fluid, can realize high efficiency cleaning simultaneously.
And, preferred: as in above-mentioned vacuum pallet, to supply with above-mentioned pallet cleaning fluid, on one side Yi Bian and make the pallet cleaning fluid overflow, clean to other vacuum pallets adjacent from this vacuum pallet with this vacuum pallet.
Promptly, if forming the pallet cleaning fluid does not overflow and keep having the state of the liquid level of specified altitude in this vacuum pallet from the vacuum pallet, then be positioned at the pallet cleaning fluid of this liquid level, in above-mentioned cleaning process, be cooled, have and produce the worry that temperature descends, therefore, be arranged in the crystallised component of dissolving of the pallet cleaning fluid of above-mentioned liquid level sometimes, on the wall of the vacuum pallet that contacts with this liquid level, separate out again.
But, as mentioned above, if overflow the pallet cleaning fluid from above-mentioned vacuum pallet, then do not form above-mentioned liquid level, can prevent to be contained in the crystallised component that has dissolved in the pallet cleaning fluid, can on the above-mentioned wall of vacuum pallet, separate out again, can suppress to be positioned at the temperature decline of the pallet cleaning fluid of vacuum pallet simultaneously, can promote to deposit attached to the dissolving of crystallised component in the pallet cleaning fluid on the above-mentioned web plate etc., and can prevent to clean not enough.
And, by make height that the pallet cleaning fluid overflows from the vacuum pallet be positioned at above-mentioned filter cloth below near, not only above-mentioned web plate and can make filter cloth below be immersed in the pallet cleaning fluid, and also can clean, remove the crystallised component of deposition attached to the above-mentioned slip below the above-mentioned filter cloth.
In addition, preferred: that the temperature of above-mentioned pallet cleaning fluid is remained on more than the temperature that recrystallizes of carrying out above-mentioned crystallised component.
And, preferred above-mentioned a plurality of vacuum pallets, as filter cake form with, filter cake clean with and take off liquid usefulness, on the above-mentioned above-mentioned vacuum line that takes off the vacuum pallet that liquid uses, possess above-mentioned vacuum pressure mensuration mechanism and above-mentioned cleaning solution supplying mechanism simultaneously at least.
At this moment, in taking off the vacuum pallet that liquid uses, because the amount of the mother liquor that slip itself contains is little, the gas flow that attracts is big, therefore the temperature of filtrate descends, crystallised component is separated out on above-mentioned web plate etc. especially easily, but owing to have vacuum and press and measure mechanism and cleaning solution supplying mechanism being easy to generate this vacuum pallet of separating out, so can effectively dissolve the crystallised component that removal is separated out in vacuum apparatus.
Particularly, take off the vacuum pallet that liquid is used by further constituting this by a plurality of vacuum pallets, having above-mentioned vacuum on these take off the vacuum line of the vacuum pallet that liquid uses presses and measures mechanism and above-mentioned cleaning solution supplying mechanism, for example wherein 1 vacuum pallet is carried out above-mentioned cleaning during, can also proceed to take off liquid with other vacuum pallet, can realize high efficiency washing.
Description of drawings
Fig. 1 is the summary pie graph of expression one embodiment of the invention.
Fig. 2 is the side view of the device body of presentation graphs 1.
Fig. 3 is the local amplification profile of the vacuum pallet of presentation graphs 2.
Among the figure: 10-device body, 11-filter cloth, 16-vacuum pallet, 16I-web plate, 20-vacuum line, 26-cleaning solution supplying mechanism, 27A～27C-vacuum is pressed and is measured mechanism, 30-vacuum suction device, F-moving direction, S-slip.
The specific embodiment
Below, with reference to Fig. 1～Fig. 3, one embodiment of the present invention is described.
In the vacuum apparatus of present embodiment, as shown in Figure 1, form summary and constitute with device body 10, vacuum line 20, vacuum suction device 30 and room temperature control piper 50.Below, above-mentioned 10,20,30,50 details is described.
At first, in device body 10, as shown in Figure 2, and the filter cloth 11 of coiling ring-band shape between a plurality of cylinders 12, the upper portion of this filter cloth 11 forms the filter house 11A that disposes in horizontal direction extension mode.Then, one distolateral (in Fig. 1 and Fig. 2 at this filter house 11A, be the right side), the cylinder 12A of coiling filter cloth 11 is connected with not shown drive unit, by utilizing this drive unit, drive above-mentioned cylinder 12A clockwise direction in figure and rotate, filter cloth 11 also along cylinder 12 by rotating drive continuously, thereupon, the filter house 11A that makes filter cloth 11 continuously in figure the moving direction shown in the arrow F move.
Below filter house 11A, from slip feedway 13 described later roughly under towards the moving direction F of above-mentioned filter house 11A, a plurality of vacuum pallets 16 (in the illustrated example being 5) that link with vacuum suction device 30 are set.In these vacuum pallets 16, be configured in the rear end of above-mentioned moving direction F and be positioned at slip feedway 13 roughly under vacuum pallet 16A, as filter cake form with (below, being called filter cake forms with vacuum pallet 16A), in addition, form with vacuum pallet 16A adjacency with filter cake, and be positioned at filter cake cleaning device 21 described later roughly under vacuum pallet 16B, as filter cake clean with (below, being called filter cake cleans with vacuum pallet 16B), in addition, clean with vacuum pallet 16B adjacency with filter cake, and a plurality of vacuum pallet 16C is set towards above-mentioned moving direction F, 16D, 16E, as take off liquid with (below, 16C～the 16E that will set gradually towards the place ahead from the rear of above-mentioned moving direction F is called the 1st and takes off liquid vacuum pallet 16C respectively, the 2nd takes off liquid vacuum pallet 16D, the 3rd takes off liquid vacuum pallet 16E).
In addition, a plurality of vacuum pallets 16, link mutually between the vacuum pallet of the last adjacency of above-mentioned moving direction F, wherein, at the vacuum pallet 16 of the rear end that is positioned at moving direction F, be that filter cake forms with vacuum pallet 16A, as shown in Figure 2, with on the framework 10A that is installed in device body 10, can drive cylinder 18 to the flexible cylinder of above-mentioned moving direction F etc. and link, thus, whole vacuum pallets 16 can be to above-mentioned moving direction F, move so that the prescribed stroke one is round, promptly can advance and retreat along this moving direction F.
In addition, at device body 10, as shown in Figure 2, bottom, width two ends at a plurality of vacuum pallets 16 is provided with pair of guide rails 22 in the mode of extending to above-mentioned moving direction F, devices spaced apart ground has a plurality of rotations support wheel 19 freely on the above-mentioned width of filter cloth 11, this support wheel 19 contacts with guide rail 22 from the below and supports vacuum pallet 16, vacuum pallet 16 can be advanced and retreat on these support wheels 19 that can freely rotate, on the contrary, support wheel 19 is along with the advance and retreat of this vacuum pallet 16 that is driven by above-mentioned driving cylinder 18, and rotates drivenly.Herein, the shape of these support wheels 19 and size are identical mutually, be situated between respectively by carriage on the framework A that is located at device body 10 up etc., the horizontal rotating shaft that extends on the above-mentioned width rotates freely and installs, formation is short cylindric of the thick discoideus or shaft length of the profile at center with this turning cylinder, dual-side portion along the width of the above-mentioned lower face of vacuum pallet 16 is arranged in the 2 parallel row that extend to above-mentioned moving direction F, the support wheel 19 that respectively lists each other, in the first-class arranged spaced of above-mentioned moving direction F, while support wheel 19 between two row forms a pair of on width, these paired support wheels 19, the 19 moving direction F that are provided in to heavens that equate with mutual above-below direction to each other go up the position that equates.
Another distolateral (being the left side in Fig. 1 and Fig. 2) of the filter house 11A of filter cloth 11, promptly with respect to the top of the rear side of above-mentioned moving direction F, the slip feedway 13 of supplying with slip S on filter cloth 11 is set, the slip S that supplies with on filter clothes 11 from this slip feedway 13, with moving in the process that moves to above-mentioned moving direction F of filter house 11A,, filtered via filter cloth 11 by each vacuum pallet 16 by vacuum attraction.Then, the slip feedway 13 of filter house 11A above above-mentioned moving direction F one side, filter cake cleaning device 21 from filter cake cleaning fluid L to filter cloth 11 that supply with is set, in order to supply with filter cake cleaning fluid L to the above-mentioned cake layer that filters slip S formation by attraction.In addition, scraper 14 is set driving on the above-mentioned cylinder 12A of filter cloth 11, peels off to finish to filter, take off from filter cloth 11 in the mode of scraping and take off the liquid filter cake behind the liquid.In addition,, filter cloth cleaning device 15 is set in Fig. 1, scrapes filter cloth 11 behind the slip S in order to clean by above-mentioned scraper 14 at the end (being the right side) of the filter house 11A of filter cloth 11, promptly with respect to the below of the front side of above-mentioned moving direction F.
In the present embodiment, above device body 10, slip feedway 13 and filter cake cleaning device 21 as shown in Figure 1, form and are incorporated in closed chamber R formation interior and that interdict from the outside.
In addition, as shown in Figure 3, above-mentioned a plurality of vacuum pallet 16, have respectively above the surface of filter cloth 11A is extended simultaneously, abut against filter cloth 11A below planar portions 16F, from wall portion 16G, the 16G of width both ends of planar portions 16F to extend to the mode of two outsides of above-mentioned width expansion more respectively towards the top more.Planar portions 16F forms the laminated body that plate-shaped laminated successively body 16H and surface form the web plate 16I of a plurality of through hole 16J.
And, abut against the face side of web plate 16I below the filter cloth 11A, in addition, linking in the rear side of web plate 16I has the vacuum line 20 that is communicated with above-mentioned vacuum suction device 30.
Gas-liquid separation groove 31～33 has with filter cake the 2nd gas-liquid separation groove 32 that forms the 1st gas-liquid separation groove 31 that is communicated with pallet 16A, be communicated with pallet 16B with the filter cake cleaning, takes off the 3rd gas-liquid separation groove 33 that liquid is communicated with pallet 16C, 16D and 16E with the 1st～the 3rd.In addition, on each gas-liquid separation groove 31～33, have respectively: mensuration is recovered to the level gauging device 36～38 of the amount of the filtrate in the separating tank 31～33, comes the automatic valve SV1～SV3 of the filtrate discharge mouth on the switch gas-liquid separation groove 31～33 from the filtrate pump 39～41 of gas-liquid separation groove 31～33 these filtrates of discharge, according to the measurement result of level gauging device 36～38.
In addition, between gas-liquid separation groove 31～33 and cooler 35, has the 1st temperature measuring device 42 of the temperature that can measure above-mentioned gas, according to the measurement result of the 1st temperature measuring device 42, the aperture of operation control valve CV1 is controlled cooler 35, can control the temperature of above-mentioned gas thus.
In addition, the vacuum apparatus of present embodiment, has room temperature control piper 50, this room temperature control piper 50 is communicated with vavuum pump 34, simultaneously by the be cooled above-mentioned gas of device 35 cooling and after the temperature of having controlled this gas, it being supplied with in closed chamber R of supply, and can control temperature in the R of sealing chamber.This room temperature control piper 50 has: the 1st heater 51 of the above-mentioned gas that heating is supplied with from vavuum pump 34, measure the temperature in the above-mentioned closed chamber R the 2nd temperature measuring device 52, measure flow measurement device 53 by the flow of above-mentioned gas in above-mentioned closed chamber R of the 1st heater 51 heating.And, have: according to the 2nd temperature measuring device 52 regulate the 1st heater 51 control valve CV2, and regulate the control valve CV3 of the flow of supplying with the above-mentioned gas in the above-mentioned closed chamber R according to the measurement result of flow measurement device 53.In addition, by with adjusted the above-mentioned gas of temperature and flow, via automatic valve SV4, flow in the above-mentioned closed chamber R.
Herein, above-mentioned vacuum line 20, as shown in Figure 1, have: link filter cake formation and take off the 3rd vacuum line 20C of liquid with the 2nd vacuum line 20B, the binding the 1st～the 3rd of pallet 16B and the 2nd gas-liquid separation groove 32 with pallet 16C, 16D and 16E and the 3rd gas-liquid separation groove 33 with the 1st vacuum line 20A, the cleaning of binding filter cake of the following of pallet 16A and the 1st gas-liquid separation groove 31.In addition, at the 1st～the 3rd vacuum line 20A, 20B, 20C, has the 1st～the 3rd collector 22～24 respectively.With the 1st～the 3rd inside of taking off the 3rd collector 24 that liquid links with pallet 16C, 16D and 16E, roughly be separated into 3 five equilibriums by 2 dividing plates 25, be communicated with the 1st～the 3rd in these spaces that are separated respectively and take off liquid with pallet 16C～16E.
In addition, for the ease of following explanation, at the 3rd collector 24, with in above-mentioned each space that is separated, take off liquid and be called " the 3rd collector 24A " with the 1st with the part that pallet 16C is communicated with, to take off liquid and be called " the 3rd collector 24B " with the 2nd with the part that pallet 16D is communicated with, in addition, will take off liquid and be called " the 3rd collector 24C " with the 3rd with the part that pallet 16E is communicated with.
; in the present embodiment; the the 1st～the 3rd take off liquid with pallet 16C～16E and above-mentioned the 3rd collector 24A～24C that is separated between, have the pallet cleaning solution supplying mechanism 26 that supplies with the pallet cleaning fluid of the crystallised component that can dissolve slip S to these pallets 16C～16E.In addition, between pallet cleaning solution supplying mechanism 26 and the 3rd collector 24A～24C, has automatic valve SV5～SV7.In addition, in above-mentioned the 3rd collector 24A～24C that is separated, have respectively: measure with the 1st～the 3rd take off liquid below the above-mentioned filter house 11A of subtend above pallet 16C～16E and the 1st～the 3rd vacuum of pressing of the vacuum between the vacuum apparatus 30 press the mensuration 27A～27C of mechanism.
Pallet cleaning solution supplying mechanism 26, as shown in Figure 1, have with the 1st～the 3rd and take off the automatic valve SV8 that liquid is communicated with pallet 16C～16E, SV9, SV10, mensuration is taken off the 3rd temperature measuring device 26A of the temperature of the pallet cleaning fluid before liquid is supplied with pallet 16C～16E to the 1st～the 3rd, the 2nd heater 26B of heated tray cleaning fluid, regulate the control valve CV4 of the flow of the thermal medium of supplying with the 2nd heater 26B according to the measurement result of the 3rd temperature measuring device 26A, take off the not shown pump of liquid by above-mentioned automatic valve SV8～SV10 to the 1st～the 3rd with pallet 16C～16E supply tray cleaning fluid.By this formation, by above-mentioned automatic valve SV8～SV10, control is controlled in high 5～10 ℃ scope of the temperature of carrying out crystallization than mother liquor to the 1st～the 3rd temperature of taking off liquid pallet 16C～pallet cleaning fluid that 16E supplies with.
Herein, in the present embodiment, has not shown control part, on this control part, be connected with the said pump of the vacuum pressure mensuration 27A～27C of mechanism, automatic valve SV5～SV7 and automatic valve SV8～SV10, pallet cleaning solution supplying mechanism 26, vacuum is pressed the output signal of measuring the 27A～27C of mechanism, via above-mentioned control part, sends to said pump, automatic valve SV5～SV7 and automatic valve SV8～SV10.Promptly, press less than setting (for example-40kPaG) time press measuring vacuum that the 27A of mechanism～27C measures by vacuum, close automatic valve SV8～SV10, open automatic valve SV5～SV7 simultaneously, and do not take off liquid pallet 16C～16E supply tray cleaning fluid to the 1st～the 3rd, supply with the filtrate of reclaiming from slip S to the 3rd collector 24 via above-mentioned filter house 11A, in addition, when above-mentioned vacuum is pressed above setting, open automatic valve SV8～SV10, close automatic valve SV5～SV7 simultaneously, and stop to supply with above-mentioned filtrate, take off liquid pallet 16C～16E supply tray cleaning fluid to the 1st～the 3rd to the 3rd collector 24.
In addition, press according to each vacuum and to measure the 27A of mechanism～27C measurement result, differently switch automatic valve SV5～SV7 and SV8～SV10 respectively the 1st～the 3rd take off liquid with pallet 16C～16E and side by side do not clean each respectively.That is, press the measurement result of measuring the 28A of mechanism, switch automatic valve SV5 and SV8 according to the 1st vacuum, press the measurement result of measuring the 28B of mechanism according to the 2nd vacuum, switch automatic valve SV6 and SV9, in addition, press the measurement result of measuring the 28C of mechanism, switch automatic valve SV7 and SV10 according to the 3rd vacuum.
Below, the as above using method of the vacuum apparatus of formation is described.
At first, when common running, same, utilize slip feed mechanism 13, form with the supply of the filter cloth 11A above pallet 16A slip S to being positioned at filter cake, utilize the vacuum that acts on this pallet 16A to press the filtrate that attracts to filter slip S, and form cake layer.Then, by filter house 11A this filter cake is positioned at and cleans top, utilize filter cake cleaning device 21 supply tray cleaning fluid L, clean above-mentioned cake layer thus with pallet 16B.In addition, take off liquid with above pallet 16C～16E by utilizing filter house 11A to make this cake layer be positioned at the 1st～the 3rd successively, and take off liquid.At this moment, the filtrate that each vacuum pallet reclaims, by behind the collector 22～24, difference is turned up the soil and is imported gas-liquid separation groove 31～33 respectively, carries out gas-liquid separation respectively.
Then, come the liquid level position of the filtrate in above-mentioned each the gas-liquid separation groove 31～33 of METHOD FOR CONTINUOUS DETERMINATION by level gauging device 36～38, again according to this measurement result, the filtrate in the gas-liquid separation groove 31～33 is sent to operation arbitrarily via filtrate pump 39～41 and automatic valve SV1～SV3.On the other hand, the gas from above-mentioned each gas-liquid separation groove 31～33 is discharged because what are mixed with solution, therefore after removing above-mentioned solution by cooler 35 condensations of flowing through, turns back in the 2nd gas-liquid separation groove 32.Thus, after the above-mentioned gas that vavuum pump 34 is attracted forms drying regime,, turn back to above-mentioned closed chamber R via room temperature control piper 50.At this moment, because the temperature of above-mentioned gas need be remained on the crystallization of mother liquor separates out more than the temperature, therefore detect the interior temperature of above-mentioned closed chamber R by the 2nd temperature measuring device 52 all the time, output according to the 2nd temperature measuring device 52, utilize the 1st heater 51 and control valve CV2, the temperature of above-mentioned gas is controlled at high 5～20 ℃ scope of temperature of carrying out crystallization than mother liquor.Thus, keep and to remain on the temperature constant state of set point of temperature in the above-mentioned closed chamber R.
In addition, for above-mentioned filter cake cleaning fluid L, also detect its temperature by the 4th not shown temperature measuring device, and according to the output of this temperature tester, by the 3rd not shown heater, the temperature of above-mentioned filter cake cleaning fluid L is controlled to carry out the temperature of crystallization than mother liquor high 5～10 ℃.Thus, the temperature of mother liquor and filtrate is remained on more than the crystallization temperature, can stop crystallization to be separated out, and carry out steady running for a long time.
, even adopt to stop mechanism that above-mentioned crystallization separates out, remain in operation simultaneously, also have below filter house 11A and the 1st～the 3rd take off liquid with the worry that deposits the crystallised component that adheres to slip S on the above-mentioned web plate 16I of pallet 16C～16E.
Below, illustrate that the crystallised component deposition is attached to the 1st situation of taking off on the liquid usefulness pallet 16C.At this moment, the 1st take off liquid below the filter house 11A of pallet 16C and the vacuum between the vacuum suction device 30 press and to increase.In addition, pressing the 27A of testing agency to detect this vacuum to press when surpassing setting, pressing the output signal of the 27A of testing agency,, sending to automatic valve SV8, SV5 and said pump via above-mentioned control part from this vacuum by being located at the 1st vacuum on the 3rd collector 24A.Thus, automatic valve SV8 opens, and automatic valve SV5 closes simultaneously, stopping to utilize pallet cleaning solution supplying mechanism 26 under the state that is filtered by the 1st attraction of taking off liquid usefulness pallet 16C, supplies with the pallet cleaning fluid of having controlled flow and temperature to this pallet 16C.In addition, even in this case, also can utilize other vacuum pallet 16 (16A, 16B, 16D and 16E) to continue to implement above-mentioned attraction filtration.
So, import the 1st and take off liquid, flood above-mentioned web plate 16I with the pallet cleaning fluid among the pallet 16C, and with the mode that contacts below of filter house 11A, make it under the state that overflows from this pallet 16C, continue the stipulated time and filter running.At this moment, above-mentioned pallet cleaning fluid is because along with coming and going of each vacuum pallet 16 moved, mechanically swing is so can clean effectively.Especially owing to take off liquid from the 1st and overflow the pallet cleaning fluid on a small quantity with pallet 16C, and contain the pallet cleaning fluid of above-mentioned crystallised component can be to cool off, so can prevent that above-mentioned crystallised component is in the crystallization again of this wall with the wall state of contact of this pallet 16C.In addition,, close automatic valve SV8, stop the supply of pallet cleaning fluid, open automatic valve SV5 simultaneously, reclaim above-mentioned pallet cleaning fluid as filtrate through after the stipulated time.
In addition, carrying out the 2nd when taking off liquid, close automatic valve SV6 with the cleaning among the pallet 16D, open automatic valve SV9 simultaneously, in addition, carrying out the 3rd when taking off liquid with the cleaning among the pallet 16E, close automatic valve SV7, open automatic valve SV10 simultaneously, so can clean equally with above-mentioned.
As mentioned above, if adopt the vacuum apparatus of present embodiment, owing to press the timing of determining to supply with cleaning fluid according to the vacuum of vacuum line 20 to vacuum pallet 16, although so changes such as operational situation of vacuum apparatus, also can accurately hold the deposition of above-mentioned crystallised component on above-mentioned web plate 16I etc. and adhere to situation, can implement the cleaning of this web plate 16I etc. by suitable timing.That is, if because the adhesion amount of crystallised component on above-mentioned web plate 16I etc. is big, above-mentioned vacuum is pressed and is increased, if above-mentioned adhesion amount is few, above-mentioned vacuum is forced down, therefore can press to surpass setting in above-mentioned vacuum, for example-clean during 40kPaG.Thus, can prevent because of take place to clean bad or take off the reduction of the bad product property that causes of liquid or the waste of cleaning fluid.
In addition since to a plurality of liquid that take off with each the above-mentioned vacuum line 20 on pallet 16C～16E, measure vacuum respectively and press, press the groove that surpasses setting and only clean its vacuum, so can prevent the waste of cleaning fluid, can realize high efficiency cleaning simultaneously.
In addition, to the 1st take off liquid carry out with pallet 16C above-mentioned cleaning during because other vacuum pallet 16D, 16E proceed to take off liquid, therefore can be under the situation that the filtrate that does not stop vacuum apparatus attraction is filtered, carry out above-mentioned cleaning, can realize high efficiency cleaning.In addition, owing to, proceed to utilize the above-mentioned attraction of vacuum apparatus to filter in the pallet cleaning fluid, to flood the state of above-mentioned web plate 16I, so, at this moment, can mechanically swing the pallet cleaning fluid, and implement above-mentioned cleaning effectively.
In addition, because supply tray cleaning fluid in vacuum pallet 16, and it is overflowed from this pallet 16, therefore not only above-mentioned web plate 16I but also can be in the pallet cleaning fluid below the 11A of immersion filtration portion, can to these 16I and 11A both sides together dissolving well remove deposition above-mentioned crystallised component attached thereto.
Promptly, do not overflow and when in this vacuum pallet 16, keeping having the state of liquid level of specified altitude forming the pallet cleaning fluid from vacuum pallet 16, be positioned at the pallet cleaning fluid of this liquid level, in above-mentioned cleaning process, be cooled, have and produce the worry that temperature descends, therefore, be arranged in the crystallised component of dissolving of the pallet cleaning fluid of above-mentioned liquid level sometimes, on the wall of the vacuum pallet 16 that contacts with this liquid level, separate out again.
But, as present embodiment, if overflow the pallet cleaning fluid from above-mentioned vacuum pallet 16, then can not form above-mentioned liquid level, the crystallised component that can prevent the dissolving that the pallet cleaning fluid is contained is separated out on the above-mentioned wall of vacuum pallet 16 again, the temperature that can suppress simultaneously to be positioned at the pallet cleaning fluid of vacuum pallet 16 descends, and can promote to deposit attached to the dissolving of crystallised component in the pallet cleaning fluid on the above-mentioned web plate 16I etc., can prevent to clean deficiency.
And, by make height that the pallet cleaning fluid overflows from vacuum pallet 16 be positioned at above-mentioned filter cloth below near, and not only above-mentioned web plate 16I and can make filter house 11A below be immersed in the pallet cleaning fluid, can clean, remove the crystallised component of deposition in the lump attached to the following slip S of filter house 11A.Particularly, in the present embodiment, because the carrying out that the temperature of pallet cleaning fluid is remained on above-mentioned crystallised component is again more than the temperature of crystallization, so can promote the dissolving of above-mentioned crystallization in the pallet cleaning fluid more.
In addition, taking off liquid the 1st～the 3rd uses among pallet 16C～16E, because the amount of the mother liquor that slip S contains itself is little, the gas flow that is attracted is big, therefore the temperature of filtrate descends, crystallised component is separated out on above-mentioned web plate 16I etc. especially easily, but owing to have vacuum on this vacuum pallet of separating out and press and measure 27A～27C of mechanism and cleaning solution supplying mechanism 26 being easy to generate, so can effectively dissolve the crystallised component that removal is separated out on vacuum apparatus.In addition, in the present embodiment, even since clean a plurality of take off liquid one of in pallet 16C～16E in, also can be used for continuing to operate remaining and take off the vacuum pallet that liquid is used as taking off liquid, can realize high efficiency cleaning really.
In addition, technical scope of the present invention is not limited to above-mentioned embodiment, without departing from the spirit and scope of the present invention, can increase numerous variations.For example, in the above-described embodiment, show and take off the 1st～the 3rd that liquid has cleaning solution supplying mechanism 26 on pallet 16C～16E vacuum line 20C separately respectively and vacuum is pressed the formation of measuring the 27A～27B of mechanism, but also be not limited to this, for at least 1 vacuum pallet in above-mentioned a plurality of vacuum pallets 16,, cleaning solution supplying mechanism 26 and vacuum press that to measure mechanism 27 just passable on the vacuum line 20 that links this vacuum pallet and vacuum apparatus 30 as long as being set.Promptly, for example only set cleaning solution supplying mechanism 26 and vacuum pressure mensuration mechanism 27 on any one in the 1st vacuum line 20A, the 2nd vacuum line 20B or the 3rd vacuum line 20C, also can in the 1st vacuum line 20A, the 2nd vacuum line 20B and the 3rd vacuum line 20C, all set cleaning solution supplying mechanism 26 and vacuum pressure mensuration mechanism 27 on each.
In addition, in the above-described embodiment, show formation from trend vacuum pallet 16 supply tray cleaning fluids, but also vacuum can be pressed and measure the outside that the 27A～27C of mechanism is provided in above-mentioned closed chamber R, and can be visual above-mentioned vacuum is pressed, by operator's manual operation pallet cleaning solution supplying mechanism 26 etc.
Can successfully remove deposition attached to the crystallization on filter cloth or the web plate by suitable timing, and can prevent reliably that eyelet from stopping up or the obturation in filtrate flows space.
Claims (7)
1. the cleaning method of a vacuum apparatus, be can approximate horizontal be located at movably filter cloth on the device body below the vacuum pallet that Jie is linked with vacuum suction device by vacuum line is set, utilize above-mentioned vacuum pallet to be situated between and supply to slip on this filter cloth by above-mentioned filter cloth vacuum attraction, thereby the cleaning method of the vacuum apparatus that filters is characterized in that:
Vacuum according to above-mentioned vacuum line is pressed, and supply tray cleaning fluid in above-mentioned vacuum pallet is immersed in this vacuum pallet the pallet cleaning fluid, cleans this vacuum pallet.
2. the cleaning method of vacuum apparatus as claimed in claim 1 is characterized in that:
On the moving direction of above-mentioned filter cloth, be provided with a plurality of above-mentioned vacuum pallets, press, clean these vacuum pallets according to the vacuum of the above-mentioned vacuum line of at least 1 vacuum pallet in these a plurality of vacuum pallets.
3. the cleaning method of vacuum apparatus as claimed in claim 1 or 2 is characterized in that:
Measure each vacuum of the above-mentioned vacuum line of a plurality of above-mentioned vacuum pallets respectively and press, only clean vacuum and press the above-mentioned vacuum pallet that surpasses setting.
4. as the cleaning method of any one described vacuum apparatus in the claim 1～3, it is characterized in that:
In above-mentioned vacuum pallet, supply with above-mentioned pallet cleaning fluid, Yi Bian and make this pallet cleaning fluid overflow, clean to other vacuum pallets adjacent from this vacuum pallet on one side with this vacuum pallet.
5. as the cleaning method of any one described vacuum apparatus in the claim 1～4, it is characterized in that:
The temperature of above-mentioned pallet cleaning fluid is remained on above-mentioned crystallised component carries out more than the temperature of crystallization again.
6. vacuum apparatus, be can approximate horizontal be located at movably filter cloth on the device body below, moving direction along above-mentioned filter cloth, the vacuum pallet that a plurality of Jie are linked with vacuum suction device by vacuum line is set, utilize above-mentioned vacuum pallet to be situated between and supply to slip on this filter cloth by above-mentioned filter cloth vacuum attraction, thereby the vacuum apparatus that filters is characterized in that:
On the above-mentioned vacuum line of at least 1 vacuum pallet in above-mentioned a plurality of vacuum pallets, have vacuum that the vacuum measured in the above-mentioned vacuum line presses and press and measure mechanism, have a cleaning solution supplying mechanism simultaneously to these vacuum pallet supply tray cleaning fluids;
Measure the vacuum that mechanism measures and press according to pressing, utilize above-mentioned cleaning solution supplying mechanism, the pallet cleaning fluid is immersed in this vacuum pallet, clean this vacuum pallet to above-mentioned vacuum pallet supply tray cleaning fluid by above-mentioned vacuum.
7. vacuum apparatus as claimed in claim 6 is characterized in that:
Above-mentioned a plurality of vacuum pallet, as filter cake form with, filter cake clean with and take off liquid usefulness, on the above-mentioned above-mentioned vacuum line that takes off the vacuum pallet that liquid uses, possess above-mentioned vacuum pressure mensuration mechanism and above-mentioned cleaning solution supplying mechanism simultaneously at least.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004275815A JP4368773B2 (en) | 2004-09-22 | 2004-09-22 | Cleaning method for vacuum filtration device and vacuum filtration device |
| JP2004275815 | 2004-09-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1751770A true CN1751770A (en) | 2006-03-29 |
| CN100464813C CN100464813C (en) | 2009-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100925935A Active CN100464813C (en) | 2004-09-22 | 2004-11-16 | Cleaning method for vacuum filter and vacuum filter |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP4368773B2 (en) |
| KR (1) | KR101047972B1 (en) |
| CN (1) | CN100464813C (en) |
| RU (1) | RU2372136C2 (en) |
| TW (1) | TW200610571A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101135940B1 (en) * | 2009-10-29 | 2012-04-18 | 한국전력공사 | An apparatus for removing impurity of slurry |
| KR101269139B1 (en) | 2011-04-28 | 2013-05-29 | 주식회사 라우텍 | Water Recycling System by Using Vacuum Inhalation |
| KR102304049B1 (en) * | 2014-01-10 | 2021-09-17 | 츠키시마기카이가부시키가이샤 | Equipment for solid-liquid separation and drying of fine-powder slurry, and method therefor |
| FI127217B (en) * | 2017-01-17 | 2018-01-31 | Lappeenrannan Teknillinen Yliopisto | Method and system for determining leakage flow in a negative pressure filter system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7210541A (en) * | 1972-08-01 | 1974-02-05 | ||
| JPS62134200A (en) | 1985-12-04 | 1987-06-17 | Nagaharu Okuno | Measuring method for dehydrated cake separatability of dehydrator |
| JP2001300214A (en) * | 2000-04-20 | 2001-10-30 | Tsukishima Kikai Co Ltd | Horizontal vacuum filter apparatus and waste treatment equipment equipped therewith |
| JP2003275508A (en) * | 2002-03-22 | 2003-09-30 | Taiheiyo Cement Corp | Belt filter |
| CN2614768Y (en) * | 2003-04-09 | 2004-05-12 | 李根林 | Continuous horizontal vacuum band type filter |
-
2004
- 2004-09-22 JP JP2004275815A patent/JP4368773B2/en active Active
- 2004-11-16 CN CNB2004100925935A patent/CN100464813C/en active Active
- 2004-11-18 KR KR1020040094501A patent/KR101047972B1/en active IP Right Grant
- 2004-12-09 TW TW093138105A patent/TW200610571A/en unknown
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- 2005-09-19 RU RU2005129183/12A patent/RU2372136C2/en active
Also Published As
| Publication number | Publication date |
|---|---|
| KR101047972B1 (en) | 2011-07-13 |
| RU2372136C2 (en) | 2009-11-10 |
| TWI332859B (en) | 2010-11-11 |
| TW200610571A (en) | 2006-04-01 |
| CN100464813C (en) | 2009-03-04 |
| JP4368773B2 (en) | 2009-11-18 |
| KR20060027293A (en) | 2006-03-27 |
| RU2005129183A (en) | 2007-04-10 |
| JP2006088024A (en) | 2006-04-06 |
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