CN114534335A - Vacuum pump oil filtering device with spiral squeezer and application method - Google Patents
Vacuum pump oil filtering device with spiral squeezer and application method Download PDFInfo
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- CN114534335A CN114534335A CN202210318707.1A CN202210318707A CN114534335A CN 114534335 A CN114534335 A CN 114534335A CN 202210318707 A CN202210318707 A CN 202210318707A CN 114534335 A CN114534335 A CN 114534335A
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- filter
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- oil
- tank
- tank body
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- 238000001914 filtration Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003860 storage Methods 0.000 claims abstract description 28
- 239000002893 slag Substances 0.000 claims abstract description 21
- 238000011010 flushing procedure Methods 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims description 34
- 239000002184 metal Substances 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 16
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 abstract description 5
- 239000000428 dust Substances 0.000 description 10
- 238000005086 pumping Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000004821 distillation Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/13—Supported filter elements
- B01D29/15—Supported filter elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
- B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
- B01D29/58—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/60—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration
- B01D29/603—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor integrally combined with devices for controlling the filtration by flow measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B9/00—Presses specially adapted for particular purposes
- B30B9/02—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material
- B30B9/12—Presses specially adapted for particular purposes for squeezing-out liquid from liquid-containing material, e.g. juice from fruits, oil from oil-containing material using pressing worms or screws co-operating with a permeable casing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention belongs to the technical field of industrial sump oil filtration. The cup-shaped cup comprises a cup-shaped cup body and a cup cover, wherein the cup body is fixedly connected with the cup cover, and a closed straight-wall concave filtering cavity is arranged in an inner cavity at the upper part of the cup body; an upper backflushing device communicated with the interior of the filter cavity is arranged on the tank cover, and an outlet passage communicated with the interior of the filter cavity is arranged at the center of the tank cover; an inlet passage and a pressure relief passage are arranged on the side wall of the upper part of the tank body; a pressure relief device is arranged in the pressure relief passage; the side wall of the upper part of the tank body is also provided with a side backflushing device which is communicated with the inner cavity of the tank body; the lower part of the tank body is connected with a ball valve through an upper flange plate, and the lower part of the ball valve is connected with a slag storage tank through a lower flange plate; the lower part of the residue storage tank is provided with a spiral squeezer which consists of a shell of a porous cylinder body and a screw rod sleeved in the shell. The invention removes the impurity by air-jetting through the back-flushing device, and removes the filter residue adhered on the surface of the filter layer, so that the filtering work can be continued without influencing the normal oil filtering process, and the invention can not influence the continuous operation of the main equipment.
Description
Technical Field
The invention belongs to the technical field of industrial sump oil filtration, and particularly relates to a vacuum pump oil pumping filtration device with a screw press, and an application method of the vacuum pump oil pumping filtration device in a titanium sponge production process.
Background
With the wider application development of the metal titanium, the general trend of the titanium sponge industry is to expand the production scale, improve the product quality and reduce the production cost. In the titanium sponge production equipment, the high-performance stable operation of a vacuum system is crucial to the quality of a titanium sponge product; the slide valve type vacuum pump mainly working in the low vacuum rough pumping stage always has the problems that pump oil is seriously polluted and has to be replaced in a large amount in time, so that a large amount of vacuum pump waste oil is generated in the production process of the titanium sponge.
The production process of the waste oil of the slide valve vacuum pump comprises the following steps: the main mass production mode of the titanium sponge is a process route of a magnesium reduction-distillation method, in the process, each reduction and distillation of titanium sponge equipment are accompanied by long-time vacuum pumping operation, metal magnesium and magnesium oxide steam can diffuse and flow in a vacuum passage along with air flow, and although the metal magnesium and magnesium oxide steam is blocked by a cyclone dust collector and a steel wire ball filter, part of the steam still finally reaches a slide valve vacuum pump serving as a rough pumping pump; dust entering the slide valve pump is adhered to and mixed with the vacuum pump oil which plays a role in lubricating and sealing in the pump, and cannot be discharged out of the pump and accumulated in the vacuum pump oil; the pump oil polluted by dust has increased viscosity and contains solid dust particles, the lubricating and sealing performance of the pump oil is poor, the air exhaust performance of the vacuum pump is greatly reduced, and even mechanical faults of dead locking of a slide valve and damage of the vacuum pump can occur. In order to avoid the accidents and ensure the normal operation of the vacuum system, polluted pump oil in the slide valve pump needs to be replaced in time, thereby generating a large amount of waste oil. Meanwhile, the same amount of new vacuum pump oil must be purchased for replacement. The existing sump oil treatment method and device not only have extremely high time cost, but also have extremely low efficiency, so a new oil filter device and method are urgently needed.
Compared with common dust, the dust in the embodiment is smaller and has a large quantity, and particularly after the dust is combined with pump oil, the processing difficulty is greatly improved. Laboratory tests show that the waste oil has high dust content, high viscosity and poor fluidity, and the conventional treatment method can face a plurality of problems, such as a common filtering method, frequent impurity blockage of a filter screen in the actual working process, a common centrifugal method, frequent cleaning in the actual working process due to high solid content of the dirty oil, and the like. The traditional equipment is difficult to operate and maintain, the separated impurities are difficult to treat, and the filtered impurities are high in oil content and viscous. There is an urgent need for an oil filtration apparatus that can operate continuously while dealing with the problem that the filter screen is easily clogged by the filtrate, and that is also applicable to similar situations in other industries. Aiming at the current situation, the invention provides a vacuum pump oil filtering device and method for treating the titanium sponge industry.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an oil pumping filtering device with a spiral squeezer for a vacuum pump and an application method thereof, which solve the problem that a filter screen is blocked by filter substances when the vacuum pump continuously works, improve the working efficiency and reduce the cost of an oil filtering process.
In order to achieve the purpose, the invention adopts the following technical scheme:
a vacuum pump oil filtering device with a screw squeezer comprises a trophy cup-shaped tank body and a tank cover, wherein the tank body is fixedly connected with the tank cover, a closed straight-wall downward concave filter cavity is arranged in an inner cavity at the upper part of the tank body, a filter cavity body is a metal filter screen, a filter cavity top cover is arranged in a clamping groove at the edge of the top of the tank body, and an upward convex limiting block is arranged on the outer side of the filter cavity top cover; the tank cover is provided with a limiting hole matched with the filter cavity limiting block, the limiting hole is sleeved on the limiting block, the upper edges of the tank cover and the tank body are both provided with fixing holes, the tank cover and the tank body are fixedly connected through bolts penetrating through the fixing holes, the tank cover is also provided with a guide hole connected with the guide rail, the tank cover is provided with an upper backflushing device communicated with the interior of the filter cavity, and the center of the tank cover is provided with an outlet passage communicated with the interior of the filter cavity; the side wall of the upper part of the tank body is provided with an inlet passage and a pressure relief passage, and the opening position of the pressure relief passage is higher than that of the inlet passage; a pressure relief device is arranged in the pressure relief passage; the side wall of the upper part of the tank body is also provided with a side backflushing device which is communicated with the inner cavity of the tank body, and the opening position of the side backflushing device is higher than that of the pressure relief passage; the lower part of the tank body is connected with a ball valve through an upper flange plate, and the lower part of the ball valve is connected with a slag storage tank through a lower flange plate; the lower part of the slag storage tank is provided with a spiral squeezer which consists of a shell of a porous cylinder body and a screw rod sleeved in the shell, the screw rod is connected with a motor through a speed changer, and the inner wall of the shell and the outer side of the screw rod are wrapped by metal filter screens.
The metal filter screen of the filter cavity consists of an inner metal filter layer, a middle cloth bag filter layer and an outer metal filter layer.
The pressure relief device arranged on the pressure relief passage is provided with a pressure sensor, and the flow can be automatically adjusted according to different working pressure states of the liquid.
The connecting part of the filter cavity and the tank body, the connecting part of the ball valve and the flange plate, and the connecting part of the screw rod of the screw press and the shell of the screw press are all sealed by sealing rings.
The ball valve is fixedly connected with the upper flange plate and the lower flange plate through bolts penetrating through the fixing holes.
The shell of the porous cylinder of the screw press is a cylinder with a uniform cross section.
Preferably, the shell of the multi-hole barrel of the screw squeezer is a cylinder, a liquid outlet is arranged at the lower part of the shell, and a slag discharge port is arranged at the end part of the closed end.
The cover is provided with a handle, and the hook is hung on the handle.
The application method of the vacuum pump oil filtering device in the titanium sponge production process comprises the following steps:
(1) opening the access valve, opening the filter: opening an inlet passage valve and an outlet passage valve, then enabling dirty oil to flow into an inlet passage and gradually fill the inner cavity of the tank body, starting liquid-solid separation when the liquid level is contacted with the outer wall of the metal filter screen, enabling clear oil to reach the interior of the filter cavity through the metal filter screen and accumulate in the filter cavity and then overflow from the outlet passage in the liquid-solid separation process, enabling filter residues to be intercepted on the outer wall of the filter cavity by the filter layer, enabling the dirty oil to gradually fill the inner cavity of the whole tank body along with continuous injection of the dirty oil, enabling the oil inlet speed to be higher than the oil filtering speed at the moment, and enabling the redundant dirty oil to overflow from the pressure relief passage through the pressure relief device;
(2) starting an upper backflushing device, discharging clear oil: when filter residues on the outer wall of the filter cavity are accumulated continuously, the filtering speed is reduced, the flow of the outlet passage is obviously reduced, the valve of the inlet passage is closed, the upper back flushing device at the tank cover is opened, high-pressure gas enters the filter cavity through the upper back flushing device, and filtered clean oil flows out of the outlet passage under large pressure difference;
(3) starting a side recoil device, cleaning filter residues to a residue storage area: when the clean oil basically flows out of the outlet passage, the upper backflushing device and the valve of the outlet passage are closed, the ball valve of the slag storage area is opened, the side backflushing device is started, high-pressure gas flushes filter residues on the outer wall of the filter layer through the side backflushing device, and the filter residues fall into a slag storage tank of the slag storage area through a pipeline under the impact of air flow;
(4) closing the ball valve, and enabling the process to enter a cycle: when the step (3) is finished, a valve of the ball valve is closed, clear oil is discharged out of the device, filter residues enter a residue storage area, the whole device is divided into two parts by the ball valve, the operations of the steps (1) to (3) are continuously carried out on the parts above the ball valve, a motor of the screw press below the ball valve is always in an open state, the filter residues gradually fall into a residue storage tank 21 and then fall into a screw press shell below, the filter residues are continuously pressed under the driving of a screw press screw, the pressed dirty oil flows out from a liquid discharge port at the lower part of the screw press shell through a metal filter screen, the filter residues are introduced into an inlet passage again after being collected and are filtered, and the pressed filter residues are taken out from a residue discharge port at the end part of the screw press shell.
According to the invention, the impurity removing mode of air spraying is carried out through the back flushing device, so that filter residues adhered to the surface of the filter layer are removed, the defects of the traditional filtering mode in treating the dirty oil are avoided, the filtering operation can be continued, the normal oil filtering process is not influenced, and the continuous operation of the main equipment is not influenced. According to the invention, the filter residue in the oil filtering area is flushed into the residue storage tank of the residue storage area at one time through the backflushing device, then the ball valve is closed, the oil filtering operation above the ball valve is continued, the filter residue operation below the ball valve is also performed synchronously, the filter residue in the residue storage tank gradually enters the separation area, the oil liquid which enters the residue storage tank along with the filter residue carelessly in the material conveying process is separated from part of oil liquid remaining in the filter residue through screw pressing, the separated oil liquid is collected and prepared to be put into the oil filtering process again, and the secondary treatment of the filter residue can greatly reduce the resource waste. According to the invention, through higher construction, different devices which are paved on the ground are stacked, so that the occupied area is saved, the actual processing route is also shorter, the waste of materials transmitted between the devices is avoided, and the cost, the operation period and the occupied area of the devices are greatly reduced. The invention saves more time than the traditional oil filtering method in actual work due to the working procedures of filter residue cleaning, secondary filter residue treatment and the like.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a partial schematic view of FIG. 1;
FIG. 4 is a partial schematic view of FIG. 1;
FIG. 5 is a partial schematic view of FIG. 1;
in the figure, 1-inlet passage, 2-pressure relief device, 3-pressure relief passage, 4-guiding hole, 5-hook, 6-fixing hole, 7-side recoil device, 8-upper recoil device, 9-outlet passage, 10-tank cover, 11-inner metal filter layer, 12-sealing ring, 13-sealing ring, 14-middle cloth bag filter layer, 15-outer metal filter layer, 16-fixing hole, 17-sealing ring, 18-ball valve, 19 a-upper flange, 19 b-lower flange, 20-fixing hole, 21-slag storage tank, 22-screw press shell, 23-metal filter screen, 24-screw press screw, 25-sealing ring, 26-motor, 27-speed changer, 28-sealing ring, 29-tank body, 30-slag discharge port, 31-liquid discharge port.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1, 2 and 3, the vacuum pump oil filtering device with the screw squeezer comprises a cup-shaped tank body 29 and a tank cover 10, wherein the tank body is fixedly connected with the tank cover, a closed straight-wall lower concave filtering cavity is arranged in an inner cavity at the upper part of the tank body, a filtering cavity body is a metal filter screen, a top cover of the filtering cavity is arranged in a clamping groove at the edge of the top of the tank body, and an upward convex limiting block is arranged on the outer side of the top cover of the filtering cavity; the tank cover is provided with a limiting hole matched with the filter cavity limiting block, the limiting hole is sleeved on the limiting block, the upper edges of the tank cover and the tank body are both provided with fixing holes 6, the tank cover is fixedly connected with the tank body through bolts penetrating through the fixing holes, the tank cover is also provided with a guide hole 4 connected with a guide rail, the tank cover is provided with an upper backflushing device 8 introduced into the filter cavity, and the center of the tank cover is provided with an outlet passage 9 introduced into the filter cavity; the side wall of the upper part of the tank body is provided with an inlet passage 1 and a pressure relief passage 3, and the opening position of the pressure relief passage is higher than that of the inlet passage; a pressure relief device 2 is arranged in the pressure relief passage; the side wall of the upper part of the tank body is also provided with a side backflushing device 7 which is communicated with the inner cavity of the tank body, and the opening position of the side backflushing device is higher than that of the pressure relief passage.
As can be seen from figures 1, 4 and 5, the lower part of the tank body is connected with a ball valve 18 through an upper flange 19a, and the lower part of the ball valve is connected with a slag storage tank 21 through a lower flange 19 b; the lower part of the slag storage tank is provided with a screw press which consists of a shell 22 with a porous cylinder body and a screw 24 sleeved in the shell 22, the screw is connected with a motor through a speed changer 27, and the inner wall of the shell 22 and the outer side of the screw 24 are wrapped with metal filter screens 23. The lower part of the shell 22 is provided with a liquid outlet 31, and the end part of the closed end is provided with a slag discharge port 30.
As can be seen from fig. 1 and 3, the metal filter screen is composed of an inner metal filter layer 11, a middle cloth bag filter layer 14 and an outer metal filter layer 15. The pressure relief device 2 arranged on the pressure relief passage 3 is provided with a pressure sensor, and the flow can be automatically adjusted according to different working pressure states of liquid.
As can be seen from figures 3 and 4, the connecting part of the filter cavity and the tank body is provided with sealing rings 12 and 13, the connecting part of the ball valve and the upper flange plate 19 and the lower flange plate 19 is provided with a sealing ring 17 and 28, and the connecting part of the screw rod of the screw squeezer and the shell of the screw squeezer is provided with a sealing ring 25. The ball valve is fixedly connected with the upper flange and the lower flange through bolts passing through the fixing holes 16 and 20 respectively.
As can be seen from figures 1 and 3, the cover is provided with a handle, and the hook 5 is hung on the handle.
When the vacuum pump oil filtering device is applied to the production process of the titanium sponge, the vacuum pump oil filtering device comprises the following steps:
(1) opening the access valve, opening the filter: opening a valve of the inlet passage 1 and a valve of the outlet passage 9, allowing dirty oil to flow into the inlet passage and gradually fill the inner cavity of the tank body 29, starting liquid-solid separation when the liquid level rises and contacts with the outer wall 15 of the metal filter screen, allowing clean oil to pass through the metal filter screen to reach the inside of the filter cavity during the liquid-solid separation process, allowing the clean oil to overflow from the outlet passage after accumulation, allowing filter residues to be intercepted on the outer wall 15 of the filter cavity by the filter layer, allowing the dirty oil to gradually fill the inner cavity of the tank body 29 along with continuous injection of the dirty oil, wherein the oil inlet speed is higher than the oil filtering speed, and allowing the redundant dirty oil to overflow from the pressure relief passage 3 through the pressure relief device 2;
(2) starting an upper backflushing device, discharging clear oil: when filter residues on the outer wall 15 of the filter cavity are accumulated continuously, the filtering speed is reduced, the flow of the outlet passage 9 is obviously reduced, the valve of the inlet passage 1 is closed at the moment, the upper backflushing device 8 at the tank cover 10 is opened, high-pressure gas enters the filter cavity through the upper backflushing device, and filtered clean oil flows out of the outlet passage 9 under large pressure difference;
(3) starting a side backflushing device 7, cleaning filter residues to a residue storage area: when the clean oil basically flows out from the outlet passage, the valves of the upper backflushing device 8 and the outlet passage 9 are closed, the valve of the ball valve 18 of the slag storage area is opened, the side backflushing device 7 is started again, the high-pressure gas flushes the filter residue on the outer wall 15 of the filter layer through the side backflushing device, and the filter residue falls into the slag storage tank 21 of the slag storage area through the pipeline under the impact of the gas flow;
(4) closing the ball valve 18 and the process enters the cycle: when the step (3) is finished, the valve of the ball valve 18 is closed, the clear oil is discharged out of the device, the filter residue enters a residue storage area, the whole device is divided into two parts by the ball valve 18, the operations of the steps (1) to (3) are continued on the parts above the ball valve 18, the motor of the screw press below the ball valve is always in an open state, the filter residue gradually falls into the residue storage tank 21 and then into the screw press shell below, the filter residue is continuously pressed under the driving of the screw press screw, the pressed dirty oil flows out from the liquid discharge port 31 at the lower part of the screw press shell 22 through the metal filter screen 23, the filter residue is introduced into the inlet passage again after being collected and is filtered, and the pressed filter residue is taken out from the residue discharge port 30 at the end part of the screw press shell 22.
Experimental test results show that in the process of treating the dirty oil of the vacuum pump generated in the titanium sponge production equipment, when the inner metal filter screen 11, the outer metal filter screen 15 and the metal filter screen 23 adopt the conventional 200-mesh stainless steel wire screens, metal dust particles larger than 100 microns in the dirty oil can be filtered out; when the middle cloth bag filter layer 14 adopts a conventional 50-micron filter cloth, the particle size of dust remained in the treated clear oil is less than 50 microns.
Claims (9)
1. The utility model provides a vacuum pump oil filter equipment with screw press, includes that the cup-shaped jar of body of prize-cup, cover, jar body and cover fixed connection, its characterized in that: the inner cavity at the upper part of the tank body is provided with a closed straight-wall lower concave filter cavity, the cavity of the filter cavity is a metal filter screen, the top cover of the filter cavity is arranged in a clamping groove at the edge of the top of the tank body, and the outer side of the top cover of the filter cavity is provided with a limiting block protruding upwards; the tank cover is provided with a limiting hole matched with the filter cavity limiting block, the limiting hole is sleeved on the limiting block, the upper edges of the tank cover and the tank body are both provided with fixing holes, the tank cover is fixedly connected with the tank body through bolts penetrating through the fixing holes, the tank cover is also provided with a guide hole connected with the guide rail, the tank cover is provided with an upper backflushing device communicated with the interior of the filter cavity, and the center of the tank cover is provided with an outlet passage communicated with the interior of the filter cavity; an inlet passage and a pressure relief passage are arranged on the side wall of the upper part of the tank body, and the opening position of the pressure relief passage is higher than that of the inlet passage; a pressure relief device is arranged in the pressure relief passage; the side wall of the upper part of the tank body is also provided with a side backflushing device which is communicated with the inner cavity of the tank body, and the opening position of the side backflushing device is higher than that of the pressure relief passage; the lower part of the tank body is connected with a ball valve through an upper flange plate, and the lower part of the ball valve is connected with a slag storage tank through a lower flange plate; the lower part of the slag storage tank is provided with a spiral squeezer which consists of a shell of a porous cylinder and a screw rod sleeved in the shell, the screw rod is connected with a motor through a speed changer, and the inner wall of the shell and the outer side of the screw rod are wrapped by metal filter screens.
2. A vacuum pump oil filter device according to claim 1, wherein: the metal filter screen of the filter cavity consists of an inner metal filter layer, a middle cloth bag filter layer and an outer metal filter layer.
3. The vacuum pump oil filter device according to claim 1 or 2, wherein: the pressure relief device arranged on the pressure relief passage is provided with a pressure sensor, and the flow can be automatically adjusted according to different working pressure states of liquid.
4. The vacuum pump oil filter device according to claim 1 or 2, wherein: the connection part of the filter cavity and the tank body, the connection part of the ball valve and the flange plate, and the connection part of the screw rod of the screw squeezer and the shell of the screw squeezer are all sealed by sealing rings.
5. The vacuum pump oil filter device according to claim 1 or 2, wherein: the ball valve is fixedly connected with the upper flange plate and the lower flange plate through bolts penetrating through the fixing holes respectively.
6. The vacuum pump oil filter device according to claim 1 or 2, wherein: the shell of the spiral squeezer porous cylinder is a cylinder with a uniform cross section.
7. A vacuum pump oil filter device according to claim 6, wherein: the shell of the multi-hole barrel of the spiral squeezer is a cylinder, a liquid discharge port is arranged at the lower part of the shell, and a slag discharge port is arranged at the end part of the closed end.
8. The vacuum pump oil filter device according to claim 1 or 2, wherein: the tank cover is provided with a handle, and the hook is hung on the handle.
9. An application method of the vacuum pump oil filtering device in a titanium sponge production process comprises the following steps:
(1) opening the access valve, opening the filter: opening an inlet passage valve and an outlet passage valve, allowing dirty oil to flow into an inlet passage and gradually fill an inner cavity of the tank body, starting liquid-solid separation when liquid level rises and contacts with the outer wall of a metal filter screen, allowing clean oil to reach the inside of a filter cavity through the metal filter screen in the liquid-solid separation process, overflowing from the outlet passage after accumulation, intercepting filter residues on the outer wall of the filter cavity by a filter layer, gradually filling the inner cavity of the tank body with dirty oil along with continuous injection of the dirty oil, wherein the oil inlet speed is higher than the oil filtering speed, and allowing redundant dirty oil to overflow from a pressure relief passage through a pressure relief device;
(2) starting an upper backflushing device, discharging clear oil: when filter residues on the outer wall of the filter cavity are accumulated continuously, the filtering speed is reduced, the flow of the outlet passage is reduced obviously, the valve of the inlet passage is closed, the upper back-flushing device at the tank cover is opened, high-pressure gas enters the filter cavity through the upper back-flushing device, and filtered clean oil flows out of the outlet passage under a large pressure difference;
(3) starting a side recoil device, cleaning filter residues to a residue storage area: when clean oil basically flows out of the outlet passage, the upper backflushing device and the valve of the outlet passage are closed, the ball valve of the slag deposit area is opened, then the side backflushing device is started, high-pressure gas flushes filter residues on the outer wall of the filter layer through the side backflushing device, and the filter residues fall into a slag deposit tank of the slag deposit area through a pipeline under the impact of gas flow;
(4) closing the ball valve, and enabling the process to enter a cycle: when the step (3) is finished, the valve of the ball valve is closed, the clear oil is discharged out of the device at the moment, the filter residue enters a residue storage area, the whole device is divided into two parts by the ball valve, the operations of the steps (1) to (3) are continuously carried out on the parts of the device above the ball valve, the motor of the screw squeezer below the ball valve is always in an open state, the filter residue falls into the shell of the screw squeezer below after gradually falling into the residue storage tank 21, and the filter residue is continuously squeezed under the drive of the screw squeezer,
and the squeezed dirty oil flows out from a liquid outlet at the lower part of the shell of the screw press through a metal filter screen, is collected and then is introduced into the inlet passage again for filtering, and the squeezed filter residue is taken out from a residue discharge port at the end part of the shell of the screw press.
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| CN202210318707.1A CN114534335A (en) | 2022-03-29 | 2022-03-29 | Vacuum pump oil filtering device with spiral squeezer and application method |
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