CN211800065U - Low-pressure cross-flow type filtering device and system - Google Patents
Low-pressure cross-flow type filtering device and system Download PDFInfo
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- CN211800065U CN211800065U CN202020209960.XU CN202020209960U CN211800065U CN 211800065 U CN211800065 U CN 211800065U CN 202020209960 U CN202020209960 U CN 202020209960U CN 211800065 U CN211800065 U CN 211800065U
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Abstract
The utility model belongs to the field of filters, and discloses a low-pressure cross-flow type filtering device and a system, which comprises a main cylinder body, a first sealing head, a second sealing head, a PTFE integrated structure filter element and a pressure measuring device; the two ends of the main cylinder are respectively connected with a first seal head and a second seal head, one end of the first seal head, which is far away from the main cylinder, is provided with a liquid inlet, one end of the second seal head, which is far away from the main cylinder, is provided with a slag discharge port, and the side wall of the main cylinder is provided with a clear liquid outlet; the PTFE integrated structure filter element is arranged in the main cylinder, one end of the PTFE integrated structure filter element is positioned between the main cylinder and the first seal head, and the other end of the PTFE integrated structure filter element is positioned between the main cylinder and the second seal head; the pressure measuring device is connected with the side wall of the main cylinder body, and one end of the pressure measuring device extends into the main cylinder body. Realize low pressure cross-flow filtration through PTFE integral type structural filter, adopt the surface film to filter, filter pressure is low, and then makes power consumption low and maintenance cost low, whole filter equipment simple structure, and the processing cost is low, and easily dismantles the change.
Description
Technical Field
The utility model belongs to the filter field relates to a low pressure cross-flow filter equipment and system.
Background
At present, in the industrial field, microfiltration technology generally adopts a filter membrane with surface filtration performance to filter, so that solid particles and suspended matters in liquid can be completely intercepted on the surface of the filter membrane, and the microfiltration device is one of the most effective solid-liquid separation devices at present.
The membrane filtration technology is divided into dead-end filtration and cross-flow filtration, and referring to fig. 1 and 2, the cross-flow filtration is that the blanking liquid is pushed by a pump to flow parallel to the membrane surface, and different from the dead-end filtration, the shearing force generated when the feed liquid flows through the membrane surface takes away particles retained on the membrane surface, so that the pollution layer is kept at a thin level, the dead-end filtration can only be carried out intermittently, the pollution layer on the membrane surface must be periodically removed or the membrane is replaced, and the cross-flow filtration can effectively clean the membrane as long as the tangential force of the membrane surface is improved, so that the membrane can recover the original performance, therefore, the operation mode of the cross-flow filtration is flexible, and not only can be operated intermittently, but also can be operated continuously; the cross-flow filtration forms are mainly divided into rotational flow cross-flow, internal filtration cross-flow, external force cross-flow and the like.
With the development of cross-flow filtration operating technology, there is a trend in many fields to replace dead-end filtration. At present, the internal filtration type cross flow device mainly takes the hollow fiber tube form as the main market, but the hollow fiber tube has high processing cost and high filtration pressure, and the filtration precision of the hollow fiber tube is mainly nano-filtration, so that the internal filtration type cross flow device has the problems of large occupied area, small treatment capacity, easy blockage of a filter membrane, high power consumption, high maintenance cost and the like. In certain industries, such high precision filtration is often not required, and the application of the internal filtration cross-flow principle remains a blank in the context of coarse and micro filtration.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome interior filtration formula cross-flow device's among the above-mentioned prior art processing cost is high, and filter pressure height leads to shortcomings such as consumption of power height and maintenance cost height, provides a low pressure cross-flow filter equipment and system.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
in one aspect of the utility model, the low-pressure cross-flow type filtering device comprises a main cylinder body, a first seal head, a second seal head and a PTFE integrated structure filter element; the two ends of the main cylinder are respectively connected with a first seal head and a second seal head, one end of the first seal head, which is far away from the main cylinder, is provided with a liquid inlet, one end of the second seal head, which is far away from the main cylinder, is provided with a slag discharge port, and the side wall of the main cylinder is provided with a clear liquid outlet; the PTFE integral type structural filter element sets up inside main cylinder, and PTFE integral type structural filter element one end is located between main cylinder and the first head, and the other end is located between main cylinder and the second head.
The utility model discloses low pressure cross-flow filter equipment further improvement lies in:
the PTFE integrated structure filter element comprises a first tube plate, a second tube plate and a plurality of filter elements; the first tube plate is positioned between the main cylinder and the first seal head, and the second tube plate is positioned between the main cylinder and the second seal head; a plurality of filter holes are formed in the first tube plate and the second tube plate, one end of the filter element is connected with the filter holes in the first tube plate, and the other end of the filter element is connected with the filter holes in the second tube plate.
The first tube plate and the second tube plate are both PTFE sealing gaskets, and the filtering aperture on the filter element is 1 mu m.
The welding device also comprises a first seal head welding flange, a second seal head welding flange and a plurality of fasteners; the two ends of the main cylinder body are respectively provided with a main cylinder body first welding flange and a main cylinder body second welding flange, one end of the first end socket welding flange is connected with the first end socket, and the other end of the first end socket welding flange is connected with the main cylinder body first welding flange through a plurality of fasteners; one end of the second seal head welding flange is connected with the second seal head, and the other end of the second seal head welding flange is connected with the second welding flange of the main cylinder body through a plurality of fasteners.
And one end of the second end socket, which is far away from the main cylinder body, is provided with a group seat or a plurality of supporting columns.
The device also comprises a pressure measuring device; the pressure measuring device is connected with the side wall of the main cylinder body, and one end of the pressure measuring device extends into the main cylinder body and is used for measuring the internal pressure of the main cylinder body.
The pressure measuring device comprises a pressure gauge nipple and an electric contact pressure gauge; one end of the pressure gauge nipple is positioned in the main cylinder, and the other end of the pressure gauge nipple extends out of the main cylinder and is connected with the electric contact pressure gauge; the pressure gauge short section is connected with the side wall of the main cylinder.
The device also comprises a clear liquid cut-off valve and a slag discharge regulating valve; the clear liquid stop valve is connected with a clear liquid outlet flange, and the slag discharge regulating valve is connected with a slag discharge port flange.
Still include the import trip valve, import trip valve and inlet flange joint.
On the other hand, the utility model discloses a low pressure cross-flow filtration system, including feed liquor pump, clear solution collection device, filter residue collection device, wait to filter the liquid storage device and the above-mentioned low pressure cross-flow filtration device; one end of the liquid inlet pump is connected with the storage device for the liquid to be filtered, the other end of the liquid inlet pump is connected with the liquid inlet, the clear liquid collecting device is connected with the clear liquid outlet, and the filter residue collecting device is connected with the residue outlet.
Compared with the prior art, the utility model discloses following beneficial effect has:
the low-pressure cross-flow type filtering device realizes low-pressure cross-flow type filtering through the PTFE integrated filter element, adopts the surface membrane for filtering, has low filtering pressure, further has low power consumption and low maintenance cost, and continuously and effectively cleans the filter membrane in a cross-flow filtering mode in a filtering state, so that the original performance of the filter membrane is recovered, and the self-cleaning effect of the filter membrane is good; adopt PTFE integral type structure filter core, the filter core resilience that has the preparation of flexible PTFE material is fabulous, the installation of being convenient for, dismantlement, whole filter equipment simple structure, the processing cost is low to easily dismantle the change.
Further, the PTFE integral type structure filter core includes first tube sheet, second tube sheet and a plurality of filter core, all sets up a plurality of filtration pores on first tube sheet and the second tube sheet, and the filtration pore on first tube sheet is connected to filter core one end, and the filtration pore on the second tube sheet is connected to the other end, because the handling capacity of equipment mainly depends on filter area, PTFE integral type structure filter core surface area size promptly, the integral type filter core that adopts the preparation of tube bank form structure has bigger surface area, and filtration efficiency is higher.
Furthermore, the first tube plate and the second tube plate are both PTFE sealing gaskets, and sealing between the main cylinder and the first seal head and between the main cylinder and the second seal head is realized.
Furthermore, one end of the second end socket, which is far away from the main cylinder body, is provided with a group seat or a plurality of support columns, so that the whole equipment is convenient to install and use.
Further, set up pressure measurement device, pressure measurement device is connected and one end stretches into inside the main barrel with main barrel lateral wall for measure main barrel internal pressure, be convenient for in time learn whether PTFE integral type structure filter core blocks up, so that in time wash the filter membrane surface, clear away the filter cake.
Furthermore, a clear liquid stop valve and a slag discharge regulating valve are arranged, the clear liquid stop valve is connected with a clear liquid outlet flange, the slag discharge regulating valve is connected with a slag discharge opening flange, and self-cleaning of the low-pressure cross flow type filtering device is realized by regulating the opening degree of the slag discharge regulating valve and opening or closing the clear liquid stop valve.
Furthermore, an inlet stop valve is arranged and connected with a liquid inlet flange, so that the filter device is convenient to start and stop.
The utility model discloses low pressure cross-flow filtration system, through using above-mentioned low pressure cross-flow filtration device, only need adopt the feed liquor pump will take filtering liquid to carry to low pressure cross-flow filtration device inside can, whole process only needs the energy consumption of feed liquor pump, and power consumption is few.
Drawings
FIG. 1 is a schematic diagram of the dead-end filtration principle;
FIG. 2 is a schematic diagram of the cross-flow filtration principle;
FIG. 3 is a schematic view of the overall structure of the present invention;
FIG. 4 is a front view of the main cylinder structure of the cross-flow filter of the present invention;
FIG. 5 is a perspective view of the main cylinder structure of the cross-flow filter of the present invention;
FIG. 6 is a schematic view of the PTFE integrated filter element of the present invention;
fig. 7 is a block diagram of the usage flow of the present invention.
Wherein: 1-main cylinder; 2-a PTFE integral filter element; 3-a pressure gauge nipple; 4-electric contact pressure gauge; 5-an inlet flange; 6-inlet shut-off valve; 7-a fastener; 8-clear liquid outlet flange; 9-clear liquid cut-off valve; 10-a slag discharge port flange; 11-slag discharge regulating valve; 12-a first end enclosure; 13-welding a flange by using a first seal head; 14-a main cylinder first welding flange; 15-a second end enclosure; 16-welding a flange by using a second seal head; 17-a main cylinder second welding flange; 18-a first tubesheet; 19-a second tubesheet; 20-filter element.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 3 to 6, the low-pressure cross-flow type filtering device of the present invention is used to solve the problems of large occupied area of the industrial filter, high power consumption and easy blockage of the filter membrane. The low-pressure cross-flow type filtering device is designed to be of a tower structure and comprises a main cylinder body 1, a first seal head 12, a second seal head 15, a PTFE integrated structure filter element 2, a pressure gauge short section 3, an electric contact pressure gauge 4, a plurality of fasteners 7, an inlet cut-off valve 6, a clear liquid cut-off valve 9, a slag discharge regulating valve 11, a first seal head welding flange 13, a second seal head welding flange 16, a main cylinder body first welding flange 14 and a main cylinder body second welding flange 17.
The first welding flange 14 of main barrel and main barrel second welding flange 17 are welded respectively at 1 both ends of main barrel, the first welding flange 14 of main barrel passes through fastener 7 with first head welding flange 13 one end and is connected, the first head welding flange 13 other end welds with first head 12 one end, set up the inlet on the 12 other ends of first head, 5 one ends of inlet flange are connected with the inlet, 6 one ends of inlet trip valve are connected to 5 other ends of inlet flange, 6 other ends of inlet trip valve are connected in the liquid delivery pump, inlet trip valve 6 is used for opening or closes the inlet.
A second welding flange 17 of the main cylinder body is connected with one end of a second end socket welding flange 16 through a plurality of fasteners 7, the other end of the second end socket welding flange 16 is welded with one end of a second end socket 15, the other end of the second end socket 15 is provided with a slag discharge port, one end of a slag discharge port flange 10 is connected with the slag discharge port, the other end of the slag discharge port flange 10 is connected with a slag discharge regulating valve 11, and the slag discharge regulating valve 11 is used for regulating the opening degree of the slag discharge port; one end of the second end enclosure 15 connected with the slag discharge regulating valve 11 is also provided with a skirt or a plurality of supporting columns for supporting.
A clear liquid outlet is formed in the side wall of the main cylinder body 1, one end of a clear liquid outlet flange 8 is connected with the clear liquid outlet, the other end of the clear liquid outlet flange 8 is connected with one end of a clear liquid stop valve 9, the other end of the clear liquid stop valve 9 is connected with a post-treatment clear liquid tank or a post-treatment clear liquid system, and the clear liquid stop valve 9 is used for opening or closing the clear liquid outlet.
The main cylinder body 1 is designed into a K304 cylindrical welding structure, flange faces are welded at two ends of the main cylinder body, the whole equipment is designed according to 0.6MPa pressure, the first seal head 12 and the second seal head 15 are both K304 standard elliptical seal heads, and the welding flange faces are used for assembly connection.
PTFE integral type filter core 2 sets up inside main barrel 1, and PTFE integral type filter core 2 is when as filtering the original paper, uses as the sealing member between main barrel 1 and first head 12 and the second head 15. The PTFE integrated structure filter element 2 is designed into a PTFE integrated element as a core component of a low-pressure internal-filtering type cross-flow filter and is divided into a first tube plate 18, a second tube plate 19 and a plurality of filter elements 20, wherein the first tube plate 18 and the second tube plate 19 are both manufactured by adopting a PTFE sealing gasket process, the filter elements 20 are manufactured by adopting a PTFE high-precision filter element manufacturing process, the filter aperture is about 1 mu m, one end of each filter element 20 is connected with a filter hole formed in the first tube plate 18, the other end of each filter element is connected with a filter hole formed in the second tube plate 19, the filter elements 20 are processed into a whole with the first tube plate 18 and the second tube plate 19 by adopting a hot-press welding process, and the integrated tube bundle structure is processed and manufactured by.
Because the adoption has the 2 resilience fabulous of PTFE integral type structure filter core of flexible PTFE material preparation, when the installation, extrude PTFE integral type structure filter core 2 earlier and advance equipment main barrel 1, the first tube sheet 18 of PTFE integral type structure filter core 2 passes through the bolt fastening on first head welded flange 13 and the first welded flange 14 of main barrel, the second tube sheet 19 of PTFE integral type structure filter core 2 passes through the bolt fastening between second head welded flange 16 and main barrel second welded flange 17, the first tube sheet 18 and the second tube sheet 19 part of PTFE integral type structure filter core 2 can regard as sealed pad function to use.
The lateral wall of main barrel 1 is connected to manometer nipple joint 3 one end and this end position is located inside main barrel 1, and manometer nipple joint 3 other end connects electric contact manometer 4, and electric contact manometer 4 is used for the 1 internal pressure of real-time supervision main barrel, manometer nipple joint 3 and 1 lateral wall welded connection of main barrel.
The utility model also discloses a low-pressure cross-flow type filtering system, which comprises a liquid inlet pump, a clear liquid collecting device, a filter residue collecting device, a to-be-filtered liquid storing device and the low-pressure cross-flow type filtering device; one end of the liquid inlet pump is connected with a storage device of the liquid to be filtered, the other end of the liquid inlet pump is connected with an inlet cut-off valve 6 of the low-pressure cross-flow type filtering device, the clear liquid collecting device is connected with a clear liquid cut-off valve 9 of the low-pressure cross-flow type filtering device, and the filter residue collecting device is connected with a slag discharge regulating valve 11 of the low-pressure cross-flow type. The clear liquid collecting device, the filter residue collecting device and the storage device for the liquid to be filtered can be respectively designed into a clear liquid collecting tank, a residue slurry collecting tank and a storage pool for the liquid to be filtered.
Referring to fig. 7, the utility model discloses low pressure cross-flow filter equipment's specific working process:
the specific working process of the low-pressure cross-flow type filtering device is divided into the following parts: the three working states of filtering, cleaning and stopping can be controlled by a PLC or manually by an operator.
Firstly, filtering: the inlet cut-off valve 6 and the clear liquid cut-off valve 9 are opened, and the slag discharge regulating valve 11 is adjusted to 10-20% of opening degree. After liquid enters the main cylinder 1 through the liquid inlet, low-pressure internal filtration is realized under the surface filtration technology of the PTFE integrated structure filter element 2; because of arranging sediment governing valve 11 and having less degree of opening and shutting, so under the filter state, have partial liquid to flow out under pump pressure and action of gravity, this partial liquid lasts washes 2 filtering surfaces of PTFE integral type structure filter core, and the filter cake that forms is continuously discharged to the sediment thick liquid collecting pit through row's cinder notch, guarantees filter membrane surface cleanliness, delays or prevents that the filter membrane from blockking up.
Secondly, cleaning: the inlet cut-off valve 6 is opened, the clear liquid cut-off valve 9 is closed, and the slag discharge regulating valve 11 is adjusted to 100% opening. Setting a filtering state and a cleaning state as circulating uninterrupted action, starting the filtering state, timing, and entering the cleaning state when the filtering state time reaches a set time; and the cleaning state sets the cleaning time, and the filtering state is returned after the cleaning state time reaches the set time. The pressure of the normal filtration state is between 0 and 0.2MPa, when the reading pressure of an electric contact pressure gauge 4 is increased to be more than 0.2MPa, the situation that filter cakes on the filtration surface of the PTFE integrated structure filter element 2 are gradually formed and the filter membrane is blocked is shown, at this time, a clear liquid cut-off valve 9 is closed, a slag discharge regulating valve 11 is adjusted to be 100 percent in opening degree, all stock solution to be treated at the time is used as flushing liquid to flush the surface of the filter membrane, and the filter cakes are removed.
And finally, stopping the machine: the inlet cut-off valve 6 and the clear solution cut-off valve 9 are closed, and the slag discharge regulating valve 11 is adjusted to 100% opening. When the machine is in a shutdown state, liquid in the machine is emptied, and the liquid in the machine is used as recoil liquid to carry out self-cleaning on the machine.
To sum up, the utility model discloses low pressure cross-flow filter equipment realizes low pressure cross-flow through PTFE integral type structural filter core and filters, adopts the surface membrane to filter, and filter pressure is low, and then makes power consumption low and maintenance cost low to, filter state is with cross-flow filtration form to last effective washing to the filter membrane, makes the filter membrane resume original performance, and the filter membrane is from the cleaning effectually. Adopt PTFE integral type structure filter core, the filter core resilience that has the preparation of flexible PTFE material is fabulous, the installation of being convenient for, dismantlement, whole filter equipment simple structure, the processing cost is low to easily dismantle the change. Adopt tower structural design, on being equipped with skirt or support column and placing ground or steel platform, the area of guaranteeing equipment is little, because the handling capacity of equipment mainly depends on filter area, PTFE integral type structure filter core surface area size promptly, the integral type filter core that adopts tube bank form structure to make has bigger surface area, and filtration efficiency is higher, and simultaneously, equipment is at the operation in-process, does not have other power consumption except that feed liquor pump power consumption, and power consumption is few.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification made on the basis of the technical solution according to the technical idea of the present invention all fall within the protection scope of the claims of the present invention.
Claims (10)
1. The low-pressure cross-flow type filtering device is characterized by comprising a main cylinder body (1), a first seal head (12), a second seal head (15) and a PTFE (polytetrafluoroethylene) integrated structure filter element (2);
the two ends of the main cylinder body (1) are respectively connected with a first seal head (12) and a second seal head (15), a liquid inlet is formed in one end, far away from the main cylinder body (1), of the first seal head (12), a slag discharge port is formed in one end, far away from the main cylinder body (1), of the second seal head (15), and a clear liquid outlet is formed in the side wall of the main cylinder body (1);
PTFE integral type filter core (2) sets up inside main barrel (1), and PTFE integral type filter core (2) one end is located between main barrel (1) and first head (12), and the other end is located between main barrel (1) and second head (15).
2. The low pressure cross-flow filtration device of claim 1, wherein the PTFE unitary construction cartridge (2) comprises a first tube sheet (18), a second tube sheet (19), and a number of cartridges (20);
the first tube plate (18) is positioned between the main cylinder body (1) and the first seal head (12), and the second tube plate (19) is positioned between the main cylinder body (1) and the second seal head (15); a plurality of filter holes are formed in the first tube plate (18) and the second tube plate (19), one end of the filter element (20) is connected with the filter holes in the first tube plate (18), and the other end of the filter element is connected with the filter holes in the second tube plate (19).
3. The low pressure cross-flow filtration device according to claim 2, wherein the first tube sheet (18) and the second tube sheet (19) are both PTFE gaskets and the filter pores on the filter element (20) are 1 μm in size.
4. The low pressure cross-flow filtration device of claim 1, further comprising a first seal welding flange (13), a second seal welding flange (16), and a plurality of fasteners (7);
a main cylinder first welding flange (14) and a main cylinder second welding flange (17) are respectively arranged at two ends of the main cylinder (1), one end of a first end socket welding flange (13) is connected with a first end socket (12), and the other end of the first end socket welding flange is connected with the main cylinder first welding flange (14) through a plurality of fasteners (7); one end of a second seal head welding flange (16) is connected with the second seal head (15), and the other end of the second seal head welding flange is connected with a second welding flange (17) of the main cylinder body through a plurality of fasteners (7).
5. The low-pressure cross-flow filtration device according to claim 1, wherein a group seat or a plurality of support columns are arranged on one end of the second sealing head (15) far away from the main cylinder (1).
6. The low pressure cross-flow filtration device of claim 1, further comprising a pressure measurement device; the pressure measuring device is connected with the side wall of the main cylinder body (1), and one end of the pressure measuring device extends into the main cylinder body (1) and is used for measuring the internal pressure of the main cylinder body (1).
7. The low pressure cross-flow filtration device according to claim 6, wherein the pressure measurement device comprises a pressure gauge nipple (3) and an electro-contact pressure gauge (4);
one end of the pressure gauge short joint (3) is positioned in the main cylinder body (1), and the other end of the pressure gauge short joint extends out of the main cylinder body (1) and is connected with an electric contact pressure gauge (4); the pressure gauge short joint (3) is connected with the side wall of the main cylinder body (1).
8. The low pressure cross-flow filtration device of claim 1, further comprising a clear solution shut-off valve (9) and a reject adjustment valve (11); the clear liquid cut-off valve (9) is connected with a clear liquid outlet flange, and the slag discharge regulating valve (11) is connected with a slag discharge port flange.
9. The low pressure cross-flow filtration device according to claim 8, further comprising an inlet shut-off valve (6), wherein the inlet shut-off valve (6) is flanged to the inlet.
10. A low pressure cross flow filtration system comprising a feed pump, a clear liquid collection device, a residue collection device, a to-be-filtered liquid storage device, and a low pressure cross flow filtration device according to any one of claims 1 to 9;
one end of the liquid inlet pump is connected with the storage device for the liquid to be filtered, the other end of the liquid inlet pump is connected with the liquid inlet, the clear liquid collecting device is connected with the clear liquid outlet, and the filter residue collecting device is connected with the residue outlet.
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