CN113173618B - Full-pressure air floatation system for oily wastewater - Google Patents

Abstract

The invention relates to a full-pressure air floatation system for oily wastewater, which comprises a conveying assembly, a filtering assembly and an air floatation assembly, wherein the conveying assembly comprises a plurality of groups of rotating rollers arranged along a material conveying direction in an array manner and a deflector rod mechanism which is correspondingly and rotatably arranged on the rotating rollers and used for conveying materials, and two adjacent rotating rollers are arranged in a tangent manner; the deflector rod mechanism and the rotating roller can be spliced to form a complete cylinder; the filtering component comprises a first filtering mechanism arranged between two adjacent rotating rollers and a second filtering mechanism correspondingly arranged in the rotating rollers; the air floatation assembly comprises an air floatation tank positioned below the conveying assembly, a scraping plate mechanism which elastically slides on the air floatation tank and is correspondingly abutted against the deflector rod mechanism, and a collecting tank positioned below the air floatation tank; the plurality of groups of scraper mechanisms push the dirty oil on the liquid level in the same direction and send the dirty oil to the collecting tank.

Description

Full-pressure air floatation system for oily wastewater

Technical Field

The invention relates to sewage treatment equipment, in particular to a full-pressure air floatation system for oily wastewater.

Background

The oily wastewater mainly comes from petroleum, petrochemical industry, steel, coking, gas generation stations, machining and other industrial departments. The oil substances contained in the oil-containing wastewater include natural petroleum, petroleum products, tar and fractions thereof, and edible animal and vegetable oils and fats. If the oily wastewater is not recycled, the waste is caused; when the fertilizer is discharged into rivers, lakes or gulfs, water bodies can be polluted, the survival of aquatic organisms is influenced, and when the fertilizer is used for agricultural irrigation, soil gaps can be blocked, and the growth of crops is hindered.

The invention discloses a hot gas floating type oil-containing sewage oil remover, which belongs to the technical field of petrochemical industry and has the patent number of 201810537906.5. The invention mainly utilizes air floatation separation to remove oil from oily sewage, injects gas into the air floatation device, discharges the gas into a separation tank through tiny air holes on the surface of the air floatation device, the gas is heated while the gas is injected, the gas enters the separation tank through the air flotation device to form micro bubbles, the micro bubbles rise in the oily water to drive oil drops mixed in the oily water to move upwards, the oil drops are brought to the upper surface of the oily water, meanwhile, the heated gas can heat the oily water when moving in the oily water, and the heating demulsification is carried out, the dirty oil floats on the liquid level of the separation tank to form a dirty oil layer, the invention combines the thermal separation method and the air-flotation separation method, effectively improves the oil removing efficiency of the oil remover, improves the oil removing quality of the oil remover at the same time, and the oil removing device can realize continuous work, the air floatation separation cost is low, and the production cost is effectively reduced.

However, the equipment does not involve active cleaning of the dirty oil layer, and therefore the overall oil removal efficiency of the equipment is affected.

Disclosure of Invention

In order to solve the problems, the invention provides a full-pressure air floatation system for oily wastewater, which enables a corresponding deflector rod mechanism to successively realize solid waste conveying and push a scraper plate mechanism to move above an air floatation tank in each rotation period through rotation of a plurality of groups of rotating rollers, so that a dirty oil layer on the liquid level of the air floatation tank can be scraped while solid-liquid separation is realized, the solid-liquid separation and the air floatation are simultaneously carried out, the scraper plate mechanism can continuously work, the oil removal efficiency is effectively improved, and the production cost is effectively reduced.

In order to achieve the purpose, the invention provides the following technical scheme:

a full-pressure air floatation system for oily wastewater comprises solid-liquid separation equipment; further comprising:

the conveying assembly comprises a plurality of groups of rotating rollers arranged in an array along the material conveying direction and a deflector rod mechanism which is correspondingly and rotatably arranged on the rotating rollers and used for conveying materials, and two adjacent rotating rollers are arranged in a tangent mode; the deflector rod mechanism and the rotating roller can be spliced to form a complete cylinder;

the filtering component comprises a first filtering mechanism arranged between two adjacent rotating rollers and a second filtering mechanism correspondingly arranged in the rotating rollers and

the air floatation assembly comprises an air floatation tank positioned below the conveying assembly, a scraping plate mechanism which elastically slides on the air floatation tank and is in one-to-one correspondence collision with the deflector rod mechanism, and a collecting tank positioned below the air floatation tank; and the scraper mechanisms of a plurality of groups push the dirty oil on the liquid level towards the same direction and convey the dirty oil into the collecting pool.

As an improvement, the diameters of a plurality of groups of rotating rollers decrease progressively along the material conveying direction.

As an improvement, the solid-liquid separation equipment comprises a rack, material guide strips, a squeezing plate, a feeding hole, an air cylinder and a discharging hole, wherein a plurality of groups of the material guide strips are arranged in parallel at intervals to form a carrying surface; the pressing plate is obliquely arranged above the carrying surface; the cylinder is positioned above the frame; the discharge port is arranged at the left end of the frame; the feed inlet is positioned at the right end of the rack; and the deflector rod mechanism extends to the upper part of the carrying surface through the gap between the material guide strips to convey materials.

As an improvement, the deflector rod mechanism comprises mounting grooves which are formed in the rotating roller and are in one-to-one correspondence with gaps between two adjacent groups of the guide strips, and a deflector rod body which is rotatably mounted in the mounting grooves through torsion springs and can extend out of the carrying surface upwards through the gaps between the two adjacent groups of the guide strips; the deflector rod body and the rotating roller are spliced to form a complete cylinder.

As an improvement, the deflector rod mechanisms on two adjacent groups of the rotating rollers are arranged at an included angle of 180 degrees, and the deflector rod bodies are arranged in a staggered mode.

As an improvement, the first filtering mechanism comprises a plurality of groups of guide groove units arranged on the surface of the rotating roller in a surrounding manner, and the guide groove units comprise a plurality of groups of guide grooves which are arranged along the tangential direction of the rotating roller and distributed in an array manner along the length direction of the rotating roller.

As an improvement, the second filtering mechanism comprises an accommodating cavity which is arranged in the rotating roller and communicated with the mounting groove, a fixing frame which is fixedly connected with the rack and is positioned in the accommodating cavity, a material receiving disc which is fixedly arranged on the fixing frame and is respectively attached to the rotating roller, a filter screen disc which is rotatably arranged in the material receiving disc, and a power unit which is arranged at the bottom of the material receiving disc and drives the material receiving disc to shake left and right; and a plurality of groups of water outlets are formed in the bottoms of the two sides of the receiving disc.

As an improvement, the power unit is including rotating the installation the carousel of take-up (stock) pan below, slide from top to bottom and set up take-up (stock) pan bottom just is located two sets of ejector pins, the fixed mounting of filter screen dish pivot both sides just with two sets of on the carousel the stopper that the ejector pin contradicts in turn, install mount side and with the carousel passes through gear and the fixed mounting that transmission assembly power is connected the live-rollers inside and with the rack that the gear can mesh the setting, the ejector pin with the filter screen dish can contradict the setting.

As an improvement, the scraping plate mechanism comprises a sliding seat erected on the air flotation tank and arranged in an elastic sliding manner, a rotating plate arranged on the sliding seat in an elastic rotating manner, a scraping plate arranged below the rotating plate in a sliding manner and arranged on the liquid level in a floating manner, a limiting strip arranged on the solid-liquid separation equipment in an elastic manner and corresponding to the rotating plate, and a contact block fixedly arranged at a rotating shaft of the rotating plate and arranged in a contact manner with the limiting strip; the rotating plate rotates in a single direction, and the top of the rotating plate is abutted to the shifting lever mechanism.

As an improvement, the scraper is provided with a plurality of groups of friction blocks which are abutted against the rotating plate in a sliding mode along the rear side of the dirty oil scraping direction.

The invention has the beneficial effects that:

(1) in the invention, two adjacent groups of scraper mechanisms alternately move and scrape off dirty oil on the liquid surface, so that the dirty oil on the liquid surface is continuously pushed in the same direction, and in the resetting process of the scraper mechanisms, the contact blocks are contacted with the limiting strips to enable the rotating plate to rotate, so that the scrapers rotate upwards, the scraping surfaces of the scrapers face upwards, so that the dirty oil cannot fall onto the liquid surface again, and the dirty oil removing effect is improved;

(2) according to the scraper, the scraper is arranged at the bottom of the rotating plate in a sliding manner and can float on a liquid level, and meanwhile, when the rotating plate rotates, the friction block falls down to fix the rotating plate and the scraper, so that the scraper and the liquid level always keep a proper contact distance, and the scraping effect is improved while the dirty oil scraping efficiency is improved;

(3) when a deflector rod body in the deflector rod mechanism rotates to the tangent position of the two rotating rollers along with the rotating rollers, the deflector rod body rotates to be spliced with the rotating rollers, and then when the deflector rod body rotates to the tangent position of the two rotating rollers, the deflector rod body bounces, and materials on a carrying surface can be loosened by bouncing the deflector rod body in the feeding process, so that the squeezing efficiency of a squeezing plate can be improved;

(4) in the invention, the deflector rod body is abutted against and rotates with the adjacent rotating rollers in the rotating process after the feeding is finished, the solid materials attached to the side surface of the deflector rod body can be scraped in the process that the deflector rod body is clamped into the corresponding mounting groove, and the adjacent two rotating rollers are arranged in a tangent mode, so that the solid materials can not fall into an air flotation tank, and the efficiency of the deflector rod body for conveying the materials next time can be improved;

(5) when the deflector rod body is completely clamped into the mounting groove, the solid materials attached to the deflector rod body can be scraped by the material receiving disc in the process that the deflector rod body rotates along with the rotating roller, so that the solid materials cannot fall into the air floatation tank when the deflector rod body rotates to face the air floatation tank, and the purity of a water body is improved;

(6) when the deflector rod body forwards conveys materials on a carrying surface, part of solid materials and water flow into the filter screen disc through the mounting groove, the filter screen disc can shake left and right along with the rotation of the rotating roller to filter solid-liquid mixtures entering the filter screen disc, the solid materials are further prevented from falling into the air flotation tank when the deflector rod body rotates to face the air flotation tank, and the purity of a water body is improved.

In conclusion, the invention has the advantages of simple structure, ingenious design, good air flotation effect, good solid-liquid separation effect and the like.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a state diagram of a driving scraper mechanism of the deflector rod mechanism;

FIG. 3 is a schematic view of an air bearing assembly;

FIG. 4 is a diagram showing the operation state of the shifter lever mechanism;

FIG. 5 is a view showing an internal structure of a rotating roller;

FIG. 6 is a schematic cross-sectional view of a second filter mechanism;

FIG. 7 is a schematic view of a first filter mechanism;

FIG. 8 is an enlarged view taken at A in FIG. 3;

FIG. 9 is a view showing a state of scraping off dirty oil;

FIG. 10 is an enlarged view of FIG. 9 at B;

FIG. 11 is a first view showing the reset state of the scraping mechanism;

FIG. 12 is a second drawing showing the reset state of the scraping mechanism;

FIG. 13 is a schematic diagram of a friction block structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Examples

As shown in fig. 1 to fig. 3, a full pressure air flotation system for oily wastewater comprises a solid-liquid separation device 100; further comprising:

the conveying assembly 7 comprises a plurality of groups of rotating rollers 71 arranged in an array along the material conveying direction and a deflector rod mechanism 72 which is correspondingly and rotatably arranged on the rotating rollers 71 and used for conveying materials, and two adjacent rotating rollers 71 are arranged in a tangent mode; the deflector rod mechanism 72 and the rotating roller 71 can be spliced to form a complete cylinder;

a filter assembly 8, wherein the filter assembly 8 comprises a first filter mechanism 81 arranged between two adjacent rotating rollers 71, a second filter mechanism 82 correspondingly installed in the rotating rollers 71, and

the air flotation assembly 9 comprises an air flotation tank 91 positioned below the conveying assembly 7, a scraping plate mechanism 92 which elastically slides on the air flotation tank 91 and is in one-to-one correspondence collision with the deflector rod mechanisms 72, and a collecting tank 93 positioned below the air flotation tank 91; the plurality of groups of scraper mechanisms 92 push the dirty oil on the liquid level in the same direction, and send the dirty oil to the collection tank 93.

Further, the solid-liquid separation equipment 100 comprises a frame 1, material guide strips 2, a squeezing plate 3, a feeding hole 4, a cylinder 5 and a discharge hole 6, wherein a plurality of groups of material guide strips 2 are arranged in parallel at intervals to form a carrying surface 20; the press plate 3 is arranged obliquely above the carrying surface 20; the cylinder 5 is positioned above the frame 1; the discharge port 6 is arranged at the left side end of the frame 1; the feed inlet 4 is positioned at the right end of the frame 1; the deflector rod mechanism 72 extends to the upper part of the carrying surface 20 through the gap between the material guiding strips 2 to convey materials.

Further, as shown in fig. 1 and 2, the diameter of the plurality of sets of rotating rollers 71 decreases in the material conveying direction.

It should be noted that a plurality of sets of the rotating rollers 71 rotate synchronously.

It should be noted that, the sizes of the filter assemblies 8 and the deflector rod mechanisms 72 mounted on the corresponding rotating rollers 71 are changed correspondingly, and the distance between the press plate 2 and the carrying surface 2 is gradually reduced along the material conveying direction.

Further, as shown in fig. 2 and 4, the shift lever mechanism 72 includes an installation slot 721 that is opened on the rotating roller 71 and is arranged in one-to-one correspondence with the gap between two adjacent sets of the guide bars 2, and a shift lever body 722 that is rotatably installed in the installation slot 721 through a torsion spring and can extend out of the carrying surface 20 upward through the gap between two adjacent sets of the guide bars 2; the deflector rod body 722 and the rotating roller 71 are spliced to form a complete cylinder.

Further, as shown in fig. 1 and fig. 2, the shift lever mechanisms 72 on two adjacent groups of the rotating rollers 71 are arranged at an included angle of 180 degrees, and the shift lever bodies 722 are arranged in a staggered manner.

It should be noted that a plurality of the shift lever mechanisms 72 may be disposed on a single rotating roller 71 according to production requirements, and for convenience of description, one shift lever mechanism 72 is disposed on one rotating roller 71 in the present invention.

It should be noted that, the shift lever bodies 722 on two adjacent rotating rollers 71 are arranged in a staggered manner, so that the shift lever bodies 722 are ensured to be abutted against the adjacent rotating rollers 71 to rotate, rather than being clamped into the mounting grooves 721.

It is important to note that when the shift lever body 722 rotates to a position where the two rotating rollers 71 are tangent, the shift lever body 722 rotates into the installation groove 721, and when the shift lever body 722 rotates away from the position where the two rotating rollers 71 are tangent, the shift lever body 722 can bounce.

It should be noted that, as shown in fig. 2, when the shift lever body 722 rotates from bottom to top, the shift lever body 722 rotates into the mounting groove 721 first, then the shift lever body 722 pops up rapidly and extends to the upper side of the carrying surface 20 through the gap between the material guiding strips 2, and the shift lever body 722 scatters the material on the carrying surface 20 and then conveys the material forward; when the deflector rod body 722 rotates from top to bottom, the deflector rod body 722 is firstly clamped into the mounting groove 721, solid matters attached to the end of the deflector rod body 722 and the inner wall of the mounting groove 721 can be scraped off in the process, solid matters attached to the arc surface of a pushed material can be scraped off in the rotating process after the deflector rod body 722 is spliced with the rotating roller 71, and when the deflector rod body 722 rotates to be opposite to the air flotation tank 91, the deflector rod body 722 is popped out from the mounting groove 721.

Further, as shown in fig. 4, 5 and 7, the first filtering mechanism 81 includes a plurality of sets of guiding groove units 811 disposed around the surface of the rotating roller 71, and the guiding groove units 811 include a plurality of sets of guiding grooves 8111 disposed tangentially along the rotating roller 71 and distributed in an array along the length direction of the rotating roller 71.

It should be noted that when the material is conveyed on the carrying surface 20, a part of small-particle solid material flows to a position between two adjacent groups of the rotating rollers 71 along with the liquid, and under the action of the diversion trench 8111, the solid material is completely left at the position between two adjacent groups of the rotating rollers 71, and the liquid smoothly flows into the air flotation tank 91.

It should be further noted that, because two adjacent groups of the rotating rollers 71 are always in a rotating state, and the tangential positions of the two groups of the rotating rollers 71 move in opposite directions, the solid material located at the position is always in a moving state, and it is further ensured that the diversion trench 8111 is not blocked.

Further, as shown in fig. 5 and 6, the second filtering mechanism 82 includes an accommodating cavity 821 which is opened in the rotating roller 71 and is communicated with the installation groove 721, a fixing frame 822 which is fixedly connected with the frame 1 and is located in the accommodating cavity 821, a material receiving tray 823 which is fixedly installed on the fixing frame 822 and is respectively attached to the rotating roller 71, a filter screen tray 824 which is rotatably installed in the material receiving tray 823, and a power unit 825 which is arranged at the bottom of the material receiving tray 823 and drives the material receiving tray 823 to swing left and right; the bottom of the two sides of the receiving disc 823 is provided with a plurality of groups of water outlets 8231.

It should be noted that the solid material attached to the inside of the mounting groove 721 scraped by the lever body 722 is located on the side walls of the lever body 722 and the accommodating cavity 821, the opening length of the receiving tray 823 is consistent with the diameter of the accommodating cavity 821, the extension radian of the mounting groove 721 is less than 180 °, the receiving tray 823 can smoothly scrape the solid material on the lever body 722 and the accommodating cavity 821, the lever body 722 can smoothly bounce, and the filter screen tray 824 can completely receive the liquid and small-particle solid material falling from the mounting groove 722.

Further, as shown in fig. 6, the power unit 825 includes a rotary table 8251 rotatably installed below the receiving tray 823, two sets of push rods 8252 vertically sliding to be disposed at the bottom of the receiving tray 823 and located at two sides of the rotating shaft of the filter screen tray 824, a limit block 8253 fixedly installed on the rotary table 8251 and alternately abutted against the two sets of push rods 8252, a gear 8255 fixedly installed at the side of the fixing frame 822 and connected with the rotary table 8251 through a transmission component 8254, and a rack 8256 fixedly installed inside the rotating roller 71 and engaged with the gear 8255, wherein the push rods 8252 and the filter screen tray 824 are abutted against each other.

It should be noted that when the driving lever body 722 pushes materials, liquid and small solid particles enter the accommodating cavity 821 through the installation groove 721 and fall into the filter screen disc 824, then the rack 8256 is meshed with the gear 8255 along with the rotation of the rotating roller 71, the rotating disc 8251 is driven to rotate through the transmission component 8254, two groups of push rods 8252 sequentially jack up under the action of the limit block 8253, the filter screen disc 824 is driven to shake left and right, the solid materials are left in the filter screen disc 824, the liquid enters the receiving disc 823 and flows out through the water outlet 8231, and flows into the air flotation tank 91 through the installation groove 721 below.

It should be further noted that, as shown in fig. 9, when the driving lever body 722 is inserted into the mounting groove 721, the other arc surface corresponding to the arc surface for pushing the material is attached to the inner wall of the accommodating cavity 821, and when the rotating roller 71 rotates, the receiving disc 823 can scrape off the solid material attached to the rotating roller, so that when the driving lever body 722 rotates and pops above the air flotation tank 91, no solid material falls into the air flotation tank 91, and the purity of the liquid is ensured.

Further, as shown in fig. 1, one end of the press plate 3 close to the feeding hole 4 of the frame 1 is hinged to the frame 1, and the other end of the press plate 3 is in power connection with the power output end of the cylinder 5.

It should be noted that the air cylinder 51 drives the press plate 3 to move downward, the press plate 3 cooperates with the carrying surface 20 to press the material, and the liquid falls through the gap between the guide strips 2.

Further, as shown in fig. 3 and fig. 8, the scraping plate mechanism 92 includes a sliding seat 921 erected on the air flotation tank 91 and configured to slide elastically, a rotating plate 922 configured to rotate elastically on the sliding seat 921, a scraping plate 923 configured to slide below the rotating plate 922 and float on the liquid level, a limiting strip 924 configured to be elastically installed on the solid-liquid separation device 100 and corresponding to the rotating plate 922, and an abutting block 925 fixedly installed at a rotating shaft of the rotating plate 922 and configured to abut against the limiting strip 924; the rotating plate 922 rotates in a single direction and the top of the rotating plate is abutted against the shift lever mechanism 72.

It should be noted that the limiting strip 924 is disposed on the rack 1.

It should be further noted that, as shown in fig. 9 and 10, distances from the air flotation tank 91 to the lower portions of the rotation shafts of the sets of the rotation plates 922 are kept consistent, the top ends of the rotation plates 922 are abutted against the corresponding sets of the shift lever bodies 722, and the rotation plates 922 are arranged on the sliding seats 921 in a unidirectional rotation manner, so that the sliding seats 921 and the rotation plates 922 can move, the rotation plates 922 are kept in a vertical state, and the scrapers 823 float on the liquid surface and scrape off dirty oil on the liquid surface.

It is important to note that, as shown in fig. 11 to 13, when the rotating plate 922 moves and the scraper 823 scrapes off dirty oil, the abutting block 925 collides with the limiting bar 924, the limiting bar 924 contracts, and after the scraper 823 finishes the scraping action of dirty oil, the limiting bar 924 is disengaged from the abutting block 925; when the shifting lever body 722 is disengaged from the rotating plate 922, the sliding seat 921 is reset, the limiting strip 924 abuts against the abutting block 925 again, at this time, the limiting strip 924 is kept still, the rotating plate 922 rotates by a certain angle, and at this time, the scraper 923 leaves the liquid level and the contact surface of the scraper 923 and the dirty oil faces upwards.

It is worth mentioning that two adjacent groups of scraper mechanisms 92 work in sequence to realize continuous scraping of the dirty oil on the liquid surface.

Further, the scraper blade 923 slides along the rear side of sump oil scraping direction and is provided with a plurality of groups with the rubbing block 9231 that rotor plate 922 contradicts.

It should be noted that, when the rotating plate 922 and the scraper 923 are in the vertical state, the scraper 923 can move up and down; when the rotating plate 922 rotates a certain angle with the scraper 923, the friction block 9231 falls down, and the scraper 923 does not slide at this time.

It should be further noted that as shown in fig. 12, the abutting block 925 is provided with an inclined plane, when the scraper mechanism 92 resets, the contact point of the limiting strip 924 and the inclined plane of the abutting block 925 is located on the same straight line with the rotation center of the rotating plate 922, and when the rotating plate 922 rotates, the scraper 923 at the bottom of the rotating plate 922 collides with the scraper 923 located below the rotating plate 922, rotates with the rotating plate 922 located next to the scraper 923, and resets immediately.

Working process

The materials fall onto the carrying surface 20 from the feed inlet 4, then the rotating rollers 71 rotate, the deflector rod body 722 extends into a gap between the material guide strips 2 to convey the materials to the discharge outlet 6, the air cylinder 5 enables the squeezing plate 3 to squeeze the materials on the carrying surface 20, liquid and small particle solids fall between two adjacent groups of the rotating rollers 71, the liquid falls into the air flotation tank 91 through the diversion trench 8111, the small solid particles fall between two adjacent groups of the rotating rollers 71, the liquid and the small particle solids also fall into the filter screen disc 824 through the installation trench 721, when the rotating rollers 71 rotate, the rack 8256 is meshed with the gear 8255, the transmission component 8254 drives the rotary disc 8251 to rotate, and then the two groups of the ejector rods 8252 are sequentially ejected under the action of the limit blocks 8253, the filter screen disc 824 is driven to shake left and right, solid materials are left in the filter screen disc 824, and liquid enters the receiving disc 823 and flows out through the water outlet 8231; before pushing the material, the driving lever body 722 firstly abuts against the adjacent rotating roller 71 and rotates into the mounting groove 721, and then the driving lever body 722 is separated from the abutting of the rotating roller 71 and bounces to disperse the material on the carrying surface 2; deflector rod body 722 rotates after the propelling movement material to adjacent with another live-rollers 71 contradicts, deflector rod body 722 rotates the card and goes into in the mounting groove 721, can with attached to its tip with the adnexed solid material of mounting groove 721 inner wall scrapes extremely hold the lateral wall of chamber 821, later rotation in-process, adjacent live-rollers 71 with take-up reel 823 will the solid material of deflector rod body 722 inside and outside and hold on the chamber 821 inner wall scrapes, deflector rod body 722 rotate when reaching the below with rotor plate 922 contradicts, make rotor plate 922 with scraper blade 923 scrapes dirty oil, when scraper mechanism 92 resets, rotor plate 922 with scraper blade 923 rotates certain angle, adjacent two sets of scraper blade 923 carries out dirty oil scraping successively for dirty oil shifts out towards same direction the air supporting pond 91.

Claims (9)

1. A full-pressure air floatation system for oily wastewater comprises a solid-liquid separation device (100); the device is characterized in that the solid-liquid separation equipment (100) comprises a rack (1), material guide strips (2), a squeezing plate (3), a feeding hole (4), an air cylinder (5) and a discharging hole (6), wherein a plurality of groups of material guide strips (2) are arranged in parallel at intervals to form a carrying surface (20); further comprising:

the conveying assembly (7) comprises a plurality of groups of rotating rollers (71) arranged in an array mode along the material conveying direction and a deflector rod mechanism (72) which is correspondingly and rotatably installed on the rotating rollers (71) and used for conveying materials, and two adjacent rotating rollers (71) are arranged in a tangent mode; the deflector rod mechanism (72) extends to the upper part of the carrying surface (20) through a gap between the material guiding strips (2) to convey materials; the deflector rod mechanism (72) and the rotating roller (71) can be spliced to form a complete cylinder;

the deflector rod mechanism (72) comprises mounting grooves (721) which are formed in the rotating roller (71) and correspond to gaps between two adjacent groups of the guide strips (2) one by one, and deflector rod bodies (722) which are rotatably mounted in the mounting grooves (721) through torsion springs and can extend out of the carrying surface (20) upwards through the gaps between the two adjacent groups of the guide strips (2); the deflector rod body (722) and the rotating roller (71) are spliced to form a complete cylinder;

the filter assembly (8) comprises a first filter mechanism (81) arranged between two adjacent rotating rollers (71), a second filter mechanism (82) correspondingly installed in the rotating rollers (71), and

the air flotation assembly (9) comprises an air flotation tank (91) positioned below the conveying assembly (7), a scraping plate mechanism (92) which elastically slides on the air flotation tank (91) and is abutted with the deflector rod mechanisms (72) in a one-to-one correspondence manner, and a collecting tank (93) positioned below the air flotation tank (91); the scraper mechanisms (92) of a plurality of groups push the dirty oil on the liquid level towards the same direction, and the dirty oil is conveyed into the collection pool (93).

2. The full pressure air flotation system for oily wastewater as claimed in claim 1, wherein the diameter of the groups of rotating rollers (71) decreases progressively along the material conveying direction.

3. The full pressure air flotation system for oily wastewater as claimed in claim 1, characterized in that the press plate (3) is arranged obliquely above the carrying surface (20); the cylinder (5) is positioned above the frame (1); the discharge port (6) is arranged at the left side end of the frame (1); the feed inlet (4) is positioned at the right end of the frame (1).

4. The full-pressure air flotation system for oily wastewater as claimed in claim 1, wherein the deflector rod mechanisms (72) on two adjacent groups of said rotating rollers (71) are arranged at an included angle of 180 degrees, and said deflector rod bodies (722) are arranged in a staggered manner.

5. The full-pressure air flotation system for oily wastewater according to claim 1, wherein the first filtering mechanism (81) comprises a plurality of sets of guiding gutter units (811) arranged around the surface of the rotating roller (71), and the guiding gutter units (811) comprise a plurality of sets of guiding gutters (8111) arranged tangentially along the rotating roller (71) and distributed in an array along the length direction of the rotating roller (71).

6. The full-pressure air flotation system for oily wastewater according to claim 1, wherein the second filtering mechanism (82) comprises an accommodating cavity (821) which is arranged in the rotating roller (71) and communicated with the installation groove (721), a fixing frame (822) which is fixedly connected with the frame (1) and is positioned in the accommodating cavity (821), a material receiving disc (823) which is fixedly arranged on the fixing frame (822) and is attached to the inner wall of the rotating roller (71), a filter screen disc (824) which is rotatably arranged in the material receiving disc (823), and a power unit (825) which is arranged at the bottom of the material receiving disc (823) and drives the material receiving disc (823) to shake left and right; the bottom of the two sides of the receiving disc (823) is provided with a plurality of groups of water outlets (8231).

7. The full-pressure air flotation system for oily wastewater according to claim 6, wherein the power unit (825) comprises a rotary table (8251) rotatably mounted below the receiving disc (823), two groups of push rods (8252) arranged at the bottom of the receiving disc (823) in a vertically sliding manner and located on two sides of a rotating shaft of the filter screen disc (824), a limit block (8253) fixedly mounted on the rotary table (8251) and alternatively abutted against the two groups of push rods (8252), a gear (8255) mounted on the side surface of the fixed frame (822) and dynamically connected with the rotary table (8251) through a transmission assembly (8254), and a rack (8256) fixedly mounted inside the rotary roller (71) and engaged with the gear (8255), wherein the push rods (8252) and the filter screen disc (824) can be abutted against each other.

8. The full-pressure air flotation system for oily wastewater according to claim 1, wherein the scraper mechanism (92) comprises a sliding seat (921) erected on the air flotation tank (91) and elastically slidably arranged, a rotating plate (922) elastically rotatably arranged on the sliding seat (921), a scraper (923) slidably arranged below the rotating plate (922) and floatingly arranged on the liquid level, a limiting strip (924) elastically installed on the solid-liquid separation equipment (100) and corresponding to the rotating plate (922), and a contact block (925) fixedly installed at a rotating shaft of the rotating plate (922) and capable of being in contact with the limiting strip (924); the rotating plate (922) rotates in a single direction, and the top of the rotating plate is abutted to the shifting lever mechanism (72).

9. The full-pressure air flotation system for oily wastewater according to claim 8, characterized in that the scraper (923) slides along the rear side of the dirty oil scraping direction and is provided with a plurality of groups of friction blocks (9231) which are abutted against the rotating plate (922).

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