CN112138466A

CN112138466A - Oil sludge treatment system

Info

Publication number: CN112138466A
Application number: CN202011058672.XA
Authority: CN
Inventors: 中原康; 乔海鸣
Original assignee: Individual
Current assignee: Chaoyang Shunde Environmental Protection Technology Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2020-12-29

Abstract

The invention discloses an oil sludge treatment system, which relates to the technical field of oily sludge treatment devices and comprises a pressure filter tank and a stirring box which are mutually connected through pipelines, wherein the stirring box is connected with a feed inlet of a settling box through a pipeline; the centrifuge is connected with a secondary treatment tank, and the secondary treatment tank is connected with the water storage tank through a second water suction pump; the connection is controlled by an electric cabinet. The system is simple in structure, good in separation effect and convenient to maintain, the transportation is more convenient and quicker by adopting a container type structure, the system is suitable for working in various environments, and the treatment efficiency of the oily sludge can be greatly improved.

Description

Oil sludge treatment system

Technical Field

The invention relates to the technical field of oily sludge treatment devices, in particular to an oily sludge treatment system.

Background

The oily sludge is a mixture of crude oil or finished oil, sludge and water polluted by other organic matters and is a concomitant product generated in the processes of petroleum exploitation, oily sewage treatment, refining, production and processing. The oil-containing sludge is divided into three types of oil field sludge, storage and transportation sludge and refinery sludge according to different sources, the oil-containing sludge has large volume, if the oil-containing sludge is directly discharged without being treated, a large amount of cultivated land is occupied, the surrounding soil, water and air are polluted, malodorous gas is generated, and the surrounding soil, water and air are polluted.

At present, the method for treating the oily sludge at home and abroad comprises the following steps: the incineration method, the biological treatment method, the thermal washing method, the solvent extraction method, the thermal cracking method and the like have respective disadvantages although the treatment modes are various, and the incineration method has high energy consumption and can generate secondary pollution; the biological treatment method can only treat oil sludge with low oil content and has long period; the oily sludge treated by the hot washing method is not thorough, and the treated residue still needs to be subjected to secondary treatment; most of organic solvents used in the solvent extraction method are toxic and volatile, and the treatment is not thorough; compared with incineration, the thermal cracking method has low energy consumption, but still has high energy consumption, the generated thermal cracking oil has complex components, cannot be reasonably utilized, is easy to cause secondary pollution, and the oily sludge after simple dehydration needs to be dried. Due to various defects, the oily sludge cannot really achieve harmless and recycling treatment. In addition, the existing treatment equipment has the defects of large volume and difficult movement, and particularly when emergency fixed-point decontamination is required, the treatment equipment cannot arrive at the site at the first time, so that the optimal time for decontamination is influenced.

Therefore, an improvement to solve the above problems is urgently needed.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an oil sludge treatment system, which is used for separating originally collected oil-containing sludge, the oil-containing sludge is input into a pressure filter tank through an oil sludge pump for filtering, the filtered oil-containing sludge enters a settling tank for settling and separating oil, water and sludge after being stirred by a stirring tank, the separated oil is stored by an oil storage tank, water is discharged into a water storage tank, the sludge is sent into a centrifuge for secondary separation, and finally, the oil-containing sludge is completely separated and collected. The device is simple in structure, good in separation effect and convenient to maintain, adopts a container type structure to enable transportation to be convenient and fast, is suitable for work in various environments, and can greatly improve the efficiency of oily sludge treatment.

In order to achieve the above object, the present invention provides the following technical solutions:

an oil sludge treatment system comprises a pressure filter tank and a stirring box which are connected with each other through pipelines, wherein the stirring box is connected with a feed inlet of a settling box through a pipeline; the centrifuge is connected with a secondary treatment tank, and the secondary treatment tank is connected with the water storage tank through a second water suction pump; the pressure filter tank, the stirring box, the settling tank, the first water suction pump, the second water suction pump, the screw pump and the centrifugal machine are respectively connected with the electric cabinet.

Preferably, an ultrasonic processor is arranged at the joint of the stirring box and the feeding hole.

Preferably, the settling tank, the first water pump, the second water pump, the screw pump, the centrifuge, the secondary treatment tank, the water storage tank and the electric cabinet are sequentially arranged in a container with a movable door; and a workbench for people to move is also arranged in the container.

Preferably, the settling tank, the first water pump, the second water pump, the screw pump, the centrifuge, the secondary treatment tank and the water storage tank are arranged on the same side inside the container, and the workbench occupies the residual space.

Preferably, the movable door comprises a first double-opening door, a second double-opening door and a third double-opening door, wherein the first double-opening door, the second double-opening door and the third double-opening door are arranged at two ends of the container, and the third double-opening door is arranged in the middle section.

Preferably, the pressure filter tank comprises a tank body with a tank cover, the tank cover is buckled with the tank body to form a sealed cavity, and a filter screen assembly is arranged in the cavity; the tank body is respectively provided with a feed inlet and a discharge outlet, oily sludge enters the cavity along the feed inlet, is filtered by the filter screen assembly and then is discharged along the discharge outlet; the filter screen assembly comprises a cylindrical filter screen cylinder with an opening at the top, a filter screen cylinder flange is arranged on the outer edge of the opening of the filter screen cylinder, the filter screen cylinder sequentially penetrates through a first flange and a second flange which are arranged on the inner wall of the tank body until the filter screen cylinder flange is abutted against the top of the first flange, and the first flange is fixedly connected with the filter screen cylinder flange through screws; the bottom of the tank body is arc-shaped and comprises a slag discharge port communicated with the cavity; a tank body flange is arranged along the outer edge of the top opening of the tank body, a tank cover flange is arranged along the outer edge of the bottom opening of the tank cover, and when the tank cover is buckled with the tank body, the tank cover flange is matched with the tank body flange and achieves locking sealing through bolts and nuts; a tank body flange is arranged along the outer edge of the top opening of the tank body, a tank cover flange is arranged along the outer edge of the bottom opening of the tank cover, and when the tank cover is buckled with the tank body, the tank cover flange is matched with the tank body flange and achieves locking sealing through bolts and nuts; the top of the tank cover is arc-shaped and is provided with a group of handles; a non-metal gasket is arranged between the tank cover flange and the tank body flange; the support legs are used for supporting the tank body to keep upright, and the support legs are at least three and are connected with the outer wall of the tank body at equal intervals.

Preferably, at least two rib plates are arranged along the outer wall of the filter screen cylinder, the tops of the rib plates are vertically connected with the bottom of the flange plate of the filter screen cylinder, and the bottoms of the rib plates can be abutted against the top of the second flange plate; the rib plates are further reinforced and fixed through a circular ring, and the circular ring corresponds to the middle section of the filter screen cylinder; setting the inner diameter of the first flange plate to be R1, the inner diameter of the second flange plate to be R2, the outer diameter of the filter screen cylinder to be R and the width of the rib plate to be w, then:

R1＞r＋2w；

r＋2w＞R2＞r；

the feed inlet is located above the first flange plate, and the discharge outlet is located between the first flange plate and the second flange plate.

Preferably, the settling tank comprises a separation bin, a water collecting bin with a water outlet and an oil collecting bin with an oil outlet are respectively arranged at two ends of the separation bin, and the water collecting bin and the oil collecting bin can be communicated with the separation bin; the top of the separation bin is provided with an oil scraper, the side edge of the separation bin is provided with a feeding hole, the bottom side of the separation bin is provided with a stirring mechanism, and the bottom of the separation bin is connected with a slag discharge pipeline; the tops of the separation bin, the water collecting bin and the oil collecting bin are horizontal, and a box body is sleeved on the outer side of the separation bin, the water collecting bin and the oil collecting bin; a flow baffle is arranged in the inner cavity of the separation bin corresponding to the feed inlet; a bin partition plate is arranged between the inner cavity of the separation bin and the inner cavity of the water collecting bin, and the bin partition plate and the flow baffle plate are fixed through reinforcing ribs arranged on the inner wall of the separation bin; the stirring mechanism comprises a paddle shaft which penetrates through the separation bin and is provided with a paddle, and two ends of the paddle shaft are fixed through a group of paddle shaft supporting plates which are arranged on the outer wall of the separation bin and are driven by a motor to rotate clockwise or anticlockwise; the bottom of the separation bin is in an inverted triangle shape to form an inverted triangle cavity, the stirring mechanism is positioned in the inverted triangle cavity, and the slag discharge pipeline is positioned below the stirring mechanism.

Preferably, the number of the slag discharge pipelines is three, and the slag discharge pipelines are distributed on the side edge of the separation bin at equal intervals; a ball float valve is arranged at the position of the water collecting bin inner cavity corresponding to the water outlet; a limiting baffle is also arranged between the oil collecting bin and the separating bin and can be driven to lift through an adjusting hand wheel arranged on the side wall of the box body; the flow baffle is fixed through a set of fender slots with symmetrical inner walls arranged in the separation bin, two sides of each fender slot are fixed with the inner walls through the reinforcing ribs, and the upper end and the lower end of each fender slot are connected with the feed inlet through a set of baffles to form a horn-shaped feeding cavity; and the supporting seats are symmetrically arranged along the bottom side of the box body.

Preferably, the centrifuge is supported by a centrifuge support, and the height of the centrifuge is higher than that of the secondary treatment tank.

Preferably, the secondary treatment tank is a water circulation treatment tank.

Preferably, the ultrasonic processor is an ultrasonic homogenizer.

Advantageous effects

The invention provides an oil sludge treatment system, which is used for separating originally collected oil-containing sludge, the oil-containing sludge is input into a pressure filter tank through an oil sludge pump for filtering, the filtered oil-containing sludge enters a settling tank for settling and separating oil, water and sludge after being stirred by a stirring tank, the separated oil is stored by an oil storage tank, the water is discharged into a water storage tank, the sludge is sent into a centrifuge for secondary separation, and finally, the oil-containing sludge is completely separated and collected. The system is simple in structure, good in separation effect and convenient to maintain, the transportation is more convenient and quicker by adopting a container type structure, the system is suitable for working in various environments, and the treatment efficiency of the oily sludge can be greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of a sludge treatment system according to the present invention;

FIG. 2 is a top view of a sludge treatment system according to the present invention;

FIG. 3 is a schematic diagram of a pressure filter tank in a sludge treatment system according to the present invention;

FIG. 4 is a top view of a pressure filter tank in a sludge treatment system according to the present invention;

FIG. 5 is a schematic illustration of the mounting of the legs of a pressure filter tank in a sludge treatment system according to the present invention;

fig. 6 is a schematic structural diagram of a tank body of a pressure filter tank in the oil sludge treatment system according to the invention;

FIG. 7 is a schematic diagram of a screen assembly of a pressure filter tank in an oil sludge treatment system according to the present invention;

FIG. 8 is an enlarged view of a filtration port of a pressure filter tank in a sludge treatment system according to the present invention;

FIG. 9 is a schematic diagram of a settling tank in an oil sludge treatment system according to the present invention;

FIG. 10 is a top view of a settling tank in a sludge treatment system according to the present invention;

FIG. 11 is a right side view of a settling tank in a sludge treatment system in accordance with the present invention;

fig. 12 is a cross-sectional view of a settling tank in a sludge treatment system according to the present invention.

Graphic notation:

the container comprises a container body, a 1-1 movable door, a 1-11 first double-opening door, a 1-12 second double-opening door, a 1-13 third double-opening door, a 2-pressure filter tank, a 21-tank body, a 21-1 first flange plate, a 21-2 second flange plate, a 21-3-tank body flange, a 22-tank cover, a 22-1-tank cover flange, a 23-cavity, a 24-filter screen assembly, a 24-1-filter screen cylinder, a 24-2-filter screen cylinder flange plate, a 24-3-screw, a 24-4-rib plate, a 24-5-ring, a 24-6-filter hole, a 25-feed port, a 26-discharge port, a 27-slag discharge port, a 28-bolt, a 29-nut, a 210-handle, a 211-nonmetal gasket, 212-supporting leg, 213-threaded pipe, 214-hose joint, 215-steel pipe, 216-steel pipe flange, 217-cover plate, 3-settling tank, 31-box body, 32-separation bin, 32-1-deslagging pipeline, 32-2-inverted triangle cavity, 33 water collecting bin-, 33-1-water outlet, 33-2-water discharging connecting pipeline, 34-oil collecting bin, 34-1-oil outlet, 34-2-, 35-oil scraper, 36-feed inlet, 36-1-feeding connecting pipeline, 37-stirring mechanism, 37-1-propeller shaft, 37-2-paddle, 37-3-supporting plate, 37-4-motor, 38-baffle plate, 38-1-handle, 38-handle, 39-partition board, 310-reinforcing rib, 311-limit baffle, 312-adjusting hand wheel, 313-floating ball valve, 314-fender slot, 315-baffle, 316-support seat, 317-fixing frame, 4-stirring box, 5-electric cabinet, 6-workbench, 7-centrifuge bracket, 8-water storage tank, 9-centrifuge, 10-secondary treatment box, 11-first water pump, 12-second water pump, 13-screw pump and 14-ultrasonic processor.

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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, an oil sludge treatment system comprises a pressure filter tank 2 and an agitator tank 4 which are connected with each other through a pipeline, wherein the agitator tank 4 is connected with a feed inlet 36 of a settling tank 3 through a pipeline, the settling tank 3 further comprises an oil discharge port 34-1, a water discharge port 33-1 and a slag discharge pipeline 32-1, the oil discharge port 34-1 is connected with an oil storage tank through an oil pipe, the water discharge port 33-1 is connected with a water storage tank 8 through a first water suction pump 11, and the slag discharge pipeline 32-1 is connected with a centrifuge 9 through a screw pump 13 and is used for conveying settled sludge into the centrifuge 9; the centrifuge 9 is connected with a secondary treatment tank 10 and is used for discharging separated muddy water into the secondary treatment tank 10, and after circulation treatment, the treated water is connected with the water storage tank 8 along the secondary treatment tank 10 through a second water suction pump 12; the pressure filter tank 2, the stirring box 4, the settling tank 3, the first water pump 11, the second water pump 12, the screw pump 13 and the centrifuge 9 are respectively connected with the electric cabinet 5.

Specifically, the settling tank 3, the first water pump 11, the second water pump 12, the screw pump 13, the centrifuge 9, the secondary treatment tank 10, the water storage tank 8 and the electric cabinet 5 are sequentially installed in a container 1 with a movable door 1-1; a working platform 6 for people to move is also arranged in the container 1. The container 1 is used as a carrier to form a small movable laboratory platform, which is more beneficial to use in various environments.

In this embodiment, the settling tank 3, the first water pump 11, the second water pump 12, the screw pump 13, the centrifuge 9, the secondary treatment tank 10, the water storage tank 8 are installed on the same side inside the container 1, and the workbench 6 occupies the remaining space and is mainly used for walking of operators and debugging and overhauling of each device.

In order to enable the oily sludge entering the settling tank 3 to be better settled and separated, an ultrasonic processor 14 is arranged at the joint of the stirring tank 4 and the feeding port 36, and the ultrasonic processor 14 is an ultrasonic homogenizer and is used for demulsifying and homogenizing the oily sludge.

The centrifuge 9 is supported by a centrifuge bracket 7, the height of the centrifuge 9 is higher than that of the secondary treatment tank 10, and the automatic flow of water into the secondary treatment tank 10 is facilitated; the secondary treatment tank 10 is a water circulation treatment tank.

In order to facilitate debugging and maintenance of each device in the container 1, the two ends and the middle section of the container 1 are respectively provided with a movable door 1-1, and the movable doors 1-1 comprise a first double-opening door 1-11, a second double-opening door 1-12 and a third double-opening door 1-13.

As shown in fig. 3, the pressure filter tank 2 in this embodiment includes a tank body 21 with a tank cover 22, the tank cover 22 is fastened to the tank body 21 to form a sealed cavity 23, and a filter screen assembly 24 is disposed in the cavity 23; the tank body 21 is provided with a feed inlet 25 and a discharge outlet 26 respectively, and oily sludge enters the cavity 23 through the feed inlet 25 and is discharged through the discharge outlet 26 after being filtered by the filter screen assembly 24. The device has the advantages of simple structure, good filtering effect, convenient maintenance, light volume and convenient transportation, and can greatly improve the efficiency of oily sludge filtration.

Specifically, the device is used for filtering originally collected oily sludge, the feed inlet 25 and the discharge outlet 26 are kept unblocked during operation, the oily sludge is input into the cavity 23 along the feed inlet 25 through an external high-pressure pump device, the oily sludge continuously enters the filter screen assembly 24 under the action of high pressure and self weight, impurities with the diameter larger than that of the filter holes 24-6 are remained in the filter screen cylinder 24-1, impurities with the diameter smaller than that of the filter holes 24-6 and the weight larger than that of the sludge are settled to the bottom of the tank body 1 along the filter holes 24-6, and when the cavity 23 is gradually filled with the sludge filtered by the filter holes 24-6 until the discharge outlet 26 is reached, the filtered sludge is discharged along the discharge outlet under the action of pressure.

As shown in fig. 3, 6 and 7, the screen assembly 24 includes a cylindrical screen cylinder 24-1 with an opening at the top, a screen cylinder flange 24-2 is disposed at the outer edge of the opening of the screen cylinder 24-1, the screen cylinder 24-1 sequentially penetrates through a first flange 21-1 and a second flange 21-2 disposed on the inner wall of the tank body 21 until the screen cylinder flange 24-2 abuts against the top of the first flange 21-1, and the first flange 21-1 is fixedly connected with the screen cylinder flange 24-2 through a screw 24-3; at least two rib plates 24-4 are arranged along the outer wall of the filter screen cylinder 24-1, a large gap is formed between every two adjacent rib plates 24-4, so that oil-containing sludge of the filter screen cylinder 24-1 can be discharged along the wall of the filter screen cylinder, the tops of the rib plates 24-4 are vertically connected with the bottom of the filter screen cylinder flange plate 24-2, and the bottoms of the rib plates 24-4 can be abutted against the top of the second flange plate 21-2, so that the purpose of limiting and fixing the filter screen cylinder 24-1 is achieved, and the filter screen cylinder 24-1 is prevented from being deviated due to overlarge pressure in the cavity 23 in the working process.

In order to fix the filter screen cylinder 24-1 more firmly, the rib plates 24-4 are further fixed by a ring 24-5 in a reinforced manner, the ring 24-5 is arranged at the middle section of the filter screen cylinder 24-1, and specifically, the inner wall of the ring 24-5 can be provided with clamping grooves corresponding to the rib plates in number, so that all the rib plates 24-4 on the outer wall of the filter screen cylinder 24-1 can be clamped, and displacement of the rib plates 24-4 in the working process is avoided.

As an optimization of the present embodiment, if the inner diameter of the first flange 21-1 is R1, the inner diameter of the second flange 21-2 is R2, the outer diameter of the screen cylinder 24-1 is R, and the width of the rib plate 24-4 is w, then:

R1＞r＋2w；

r＋2w＞R2＞r。

in this embodiment, the height of the tank body 21 is 1m to 1.2m, and the inner diameter is 0.6m to 0.7 m.

As shown in fig. 8, the aperture of the filtering hole 4-6 on the filtering screen cylinder 24-1 is 2.8 mm-3.2 mm, preferably 3 mm; the distance between any adjacent filter holes 24-6 is 1.4 mm-1.6 mm, and preferably 1.5 mm.

In order to facilitate the removal of the residues at the bottom of the cavity 23, the bottom of the tank body 21 is arranged into a circular arc shape (or an inverted cone shape) to facilitate the concentration of the residues, and a slag discharge port 27 is further arranged.

As shown in fig. 4, as a connection mode of the can body 21 and the can lid 22 in the present embodiment, a can body flange 21-3 is provided along an outer edge of the top opening of the can body 21, a can lid flange 22-1 is provided along an outer edge of the bottom opening of the can lid 22, and when the can lid 22 is fastened to the can body 21, the can lid flange 22-1 is matched with the can body flange 21-3, and a locking seal is achieved by bolts 28 and nuts 29; the top of the can lid 22 is curved and is provided with a set of handles 210; a non-metal gasket 211 is arranged between the tank cover flange 22-1 and the tank body flange 21-3 for increasing the sealing degree.

In this embodiment, for smooth filtering, as shown in fig. 6, the feed port 25 is located above the first flange 21-1, and the discharge port 26 is located between the first flange 21-1 and the second flange 21-2.

As shown in fig. 5, the support structure further includes at least three legs 212 (four in this figure) for supporting the tank 21 to stand upright, and the three legs 212 are connected to the outer wall of the tank 21 at equal intervals and have stability.

As a further optimization of this embodiment, each of the feed inlet 25 and the discharge outlet 26 includes a threaded pipe 213 connected to the tank 21, and the other end of the threaded pipe 213 is connected to a hose connector 214 with a valve; the slag discharging port 27 comprises a steel pipe 215 vertically connected with the bottom of the tank body 21, the steel pipe 215 is sealed through a switch valve, the switch valve comprises a steel pipe flange 216 connected with the outer edge of the lower outlet of the steel pipe 215 and a cover plate 217 matched with the steel pipe flange 216, and the cover plate 217 and the steel pipe flange 216 are locked through bolts 28 and nuts 29; in order to facilitate the operation of the slag discharging opening 27, the distance between the cover plate 217 and the bottom of the supporting leg 212 is 130 mm-145 mm.

Because the oily sludge is corrosive and a high-pressure pump is needed in the filtering process, in the device, the tank body 21, the tank cover 22 and the filter screen cylinder 24-1 are all made of high-pressure-resistant and corrosion-resistant metal materials.

The working principle is as follows: carry the oiliness mud through the high-pressure pump in the sealed tank body, carry out high pressure through the internal filter screen subassembly that sets up of jar and wash and filter the oiliness mud, reach and remain in a filter screen section of thick bamboo with the impurity that is greater than the filtration pore, deposit jar body bottom with the impurity that weight is higher, but the volume is less than the filtration pore, finally discharge the oiliness mud after will filtering from the discharge gate, carry out follow-up fatlute separation's work.

As shown in fig. 9, 10 and 12, the settling tank 3 in this embodiment includes a separation bin 32, a water collecting bin 33 with a water discharge port 33-1 and an oil collecting bin 34 with an oil discharge port 34-1 are respectively disposed at two ends of the separation bin 32, and the water collecting bin 33 and the oil collecting bin 34 can be communicated with the separation bin 32; the top of the separation bin 32 is provided with an oil wiper 35, the side edge is provided with a feeding hole 36, the bottom side is provided with a stirring mechanism 37, and the bottom of the separation bin 32 is connected with a slag discharge pipeline 32-1. The device has the advantages of simple structure, good sedimentation effect, good collection of precipitated oil-water sludge, environmental protection, sanitation, and high working efficiency

Specifically, the separation bin 32 is used for precipitating the oil-water-sludge mixture entering the cavity through the feeding connecting pipe 36-1 and along the feeding hole 36, and layering the oil-water-sludge mixture by using physical characteristics of substances (namely, different densities of main components), wherein the density of the main substances is as follows:

rho oil > rho water > rho mud;

the delamination was as follows:

and (3) upper layer: an oil; middle layer: water; the lower layer: mud

The water and the oil with obvious layers after precipitation are respectively collected through the water collecting bin 33 and the oil collecting bin 34, and the sludge at the lower layer is stirred by the stirring mechanism arranged at the bottom of the separation bin 32 and then discharged along the slag discharging pipeline 32-1. A water outlet 33-1 on the water collecting bin 33 can be connected with an external water pipe through a water drainage connecting pipeline 33-2; an oil discharge port 34-1 on the oil collection bin 34 can be connected with an external oil pipe through an oil discharge connecting pipeline 34-2.

In order to effectively collect the layered water and oil, the tops of the separation bin 32, the water collecting bin 33 and the oil collecting bin 34 are horizontal, and the purpose of collecting water can be achieved only by communicating the separation bin 32 with the water collecting bin 33 in the middle layer; the purpose of collecting the oil can be achieved only by connecting the separation bin 32 with the oil collecting bin 34 at the upper layer.

As shown in fig. 9-11, as an optimization of the present embodiment, a flow baffle 38 is installed at a position of the inner cavity of the separation chamber 32 corresponding to the feed inlet 36; specifically, the flow baffle 38 can ensure that oil cement entering the separation bin 32 flows in more uniformly, so that the precipitation efficiency is ensured; preferably, the baffle plate 8 is fixed by a set of baffle slots 314 arranged on symmetrical inner walls in the separation chamber 32, a slot mode is adopted, the baffle plate 38 can be conveniently and smoothly taken, a handle 38-1 is arranged on the top of the baffle plate 38, two sides of the baffle slot 314 are fixed with the inner walls by the reinforcing ribs 310, the upper end and the lower end of the baffle slot 314 are connected with the feed port 36 by a set of baffles 315 to form a horn-shaped feed cavity, and thus, the mixture entering the separation chamber 32 can be ensured to uniformly flow in after passing through the baffle plate 38.

In order to prevent the oil on the upper layer from entering the water collecting bin 33, a partition plate 39 is installed between the inner cavity of the separation bin 32 and the inner cavity of the water collecting bin 33, so that water and oil can be effectively separated, and the partition plate 39 and the flow baffle 38 are fixed by a reinforcing rib 310 arranged on the inner wall of the separation bin 32.

In this embodiment, the stirring mechanism 37 includes a paddle shaft 37-1 with a paddle 37-2 penetrating through the separation chamber 32, and both ends of the paddle shaft 37-1 are fixed by a set of paddle shaft support plates 37-3 mounted on the outer wall of the separation chamber 32 (if the box 31 is provided outside the separation chamber 32, the paddle shaft support plates 37-3 are fixed on the outer wall of the box 31), and are driven by a motor 37-4 to rotate clockwise or counterclockwise. The stirring mechanism 7 is arranged to mainly prevent the sludge on the lower layer from being solidified after precipitation and being discharged smoothly, and the lower layer is continuously stirred to ensure that the sludge is not solidified and is beneficial to being discharged from the slag discharge pipeline 32-1.

As an optimization for better discharging the sludge, the bottom of the separation bin 32 is in an inverted triangle shape (at this time, the bottom of the separation bin 32 is fixed with the base of the box 31 through a set of fixing frames), so as to form an inverted triangle cavity 32-2, the stirring mechanism 37 is located in the inverted triangle cavity 32-2, and the slag discharge pipeline 32-1 is located below the stirring mechanism 37. The bottom of the separation bin 32 is arranged to be an inverted triangle, an inverted roof or a cone, which is mainly beneficial to smoothly and downwards accumulating the sludge under the emphasis of self gravity, and the mechanism 7 continuously stirs at the position, so that the sludge can be smoothly and strictly discharged out of the slag discharge pipeline 32-1. In order to increase the sludge discharge efficiency, three slag discharge pipelines 32-1 are arranged at equal intervals on the side of the separation bin 2.

As the optimization of the automatic drainage of the water collecting bin 33, a ball float 313 is installed at the position of the inner cavity of the water collecting bin 33 corresponding to the drainage port 33-1, and when the water level in the water collecting bin 33 reaches a certain height, the ball float 313 is automatically opened, so that the water in the water collecting bin 33 is smoothly drained along the drainage port 33-1.

As optimization of the oil collecting bin 34, in different environments, the proportion of main mixture in the oily water and sludge mixture to be treated is not constant, when the oily water and sludge mixture contains more oil, the oil layer on the upper layer after precipitation is thicker, and the larger the communication opening between the oil collecting bin 34 and the separation bin 32 is, the more beneficial the oil collection is; however, when the oil content is low, the oil layer on the upper layer after deposition is thinner, and the smaller the communication opening between the oil collection bin 34 and the separation bin 32, the more favorable the oil collection (preventing water in the middle layer from entering).

In view of the above, if a customized precipitation device is used for each proportion of the cement mixture, the cost is greatly increased and the complete use of the equipment is not facilitated. Therefore, in this embodiment, a limiting baffle 311 is further disposed between the oil collecting bin 34 and the separation bin 32, and the limiting baffle 311 can be driven to ascend and descend by an adjusting handwheel 312 disposed on a side wall of the box 31. By clockwise or anticlockwise rotation of the adjusting handwheel 312, a driven mechanism (such as a screw rod device, a hydraulic device and the like) is driven to drive the limiting baffle 311 to ascend or descend, so that the purpose of adjusting the size of a communication channel between the oil collecting bin 34 and the separating bin 32 is achieved. The device can be suitable for the precipitation and collection of oil-water-sludge mixtures with various proportions.

As shown in fig. 11, in order to facilitate transportation or placement and fixation of the device, a box body 31 is sleeved outside the separation bin 32, the water collection bin 33 and the oil collection bin 34, and support seats 316 which are symmetrical to each other are arranged along the bottom side of the box body 31.

The working principle is as follows: oily water sludge enters the separation bin along the feeding pipeline under the action of external pump pressure, because of different densities of oil, water and sludge, the sludge with the smallest density floats on the uppermost layer of the separation bin, water with the smaller density is on the middle layer of the separation bin, sludge with the largest density is precipitated on the bottommost layer of the separation bin, oil on the upper layer is input into the oil collecting bin through the oil scraper, because of the fact that water on the middle layer enters the water collecting bin, and the sludge on the bottommost layer is discharged along the slag discharge pipeline, so that the purposes of precipitating the oil, the water and the sludge and facilitating separation are achieved. The oil and water separated by the settling tank can be directly recycled due to being relatively pure.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An oil sludge treatment system, which is characterized in that: the device comprises a pressure filter tank (2) and a stirring box (4) which are connected with each other through pipelines, wherein the stirring box (4) is connected with a feed inlet (36) of a settling box (3) through a pipeline, the settling box (3) further comprises an oil discharge port (34-1), a water discharge port (33-1) and a slag discharge pipeline (32-1), the oil discharge port (34-1) is connected with an oil storage box through an oil pipe, the water discharge port (33-1) is connected with a water storage tank (8) through a first water suction pump (11), and the slag discharge pipeline (32-1) is connected with a centrifugal machine (9) through a screw pump (13); the centrifuge (9) is connected with a secondary treatment tank (10), and the secondary treatment tank (10) is connected with the water storage tank (8) through a second water suction pump (12); the pressure filter tank (2), the stirring box (4), the settling tank (3), the first water suction pump (11), the second water suction pump (12), the screw pump (13) and the centrifugal machine (9) are respectively connected with the electric cabinet (5).

2. The sludge treatment system of claim 1, wherein: and an ultrasonic processor (14) is arranged at the joint of the stirring box (4) and the feeding hole (36).

3. The sludge treatment system of claim 1, wherein: the settling tank (3), the first water suction pump (11), the second water suction pump (12), the screw pump (13), the centrifuge (9), the secondary treatment tank (10), the water storage tank (8) and the electric cabinet (5) are sequentially arranged in a container (1) with a movable door (1-1); and a workbench (6) for people to move is also arranged in the container (1).

4. The sludge treatment system of claim 3 wherein: the sedimentation tank (3), the first water suction pump (11), the second water suction pump (12), the screw pump (13), the centrifuge (9), the secondary treatment tank (10), the water storage tank (8) install in the same side of container (1) inside, workstation (6) occupy the residual space.

5. The sludge treatment system of claim 3 wherein: the movable door (1-1) comprises a first double-opening door (1-11), a second double-opening door (1-12) and a third double-opening door (1-13) which are arranged at two ends of the container (1) and are arranged in the middle.

6. The sludge treatment system of claim 1, wherein: the pressure filter tank (2) comprises a tank body (21) with a tank cover (22), the tank cover (22) is buckled with the tank body (21) to form a sealed cavity (23), and a filter screen assembly (24) is arranged in the cavity (23); a feed inlet (25) and a discharge outlet (26) are respectively formed in the tank body (21), and oily sludge enters the cavity (23) along the feed inlet (25), is filtered by the filter screen assembly (24) and then is discharged along the discharge outlet (26); the filter screen component (24) comprises a cylindrical filter screen cylinder (24-1) with an opening at the top, a filter screen cylinder flange (24-2) is arranged on the outer edge of the opening of the filter screen cylinder (24-1), the filter screen cylinder (24-1) sequentially penetrates through a first flange (21-1) and a second flange (21-2) which are arranged on the inner wall of the tank body (21), the filter screen cylinder flange (24-2) is abutted to the top of the first flange (21-1), and the first flange (21-1) is fixedly connected with the filter screen cylinder flange (24-2) through a screw (24-3); the bottom of the tank body (21) is arc-shaped and comprises a slag discharge port (27) communicated with the cavity (23); a tank body flange (21-3) is arranged along the outer edge of the top opening of the tank body (21), a tank cover flange (22-1) is arranged along the outer edge of the bottom opening of the tank cover (22), and when the tank cover (22) is buckled with the tank body (21), the tank cover flange (22-1) is matched with the tank body flange (21-3) and is locked and sealed through a bolt (28) and a nut (29); a tank body flange (21-3) is arranged along the outer edge of the top opening of the tank body (21), a tank cover flange (22-1) is arranged along the outer edge of the bottom opening of the tank cover (22), and when the tank cover (22) is buckled with the tank body (21), the tank cover flange (22-1) is matched with the tank body flange (21-3) and is locked and sealed through a bolt (28) and a nut (29); the top of the tank cover (22) is arc-shaped and is provided with a group of handles (210); a non-metal gasket (211) is arranged between the tank cover flange (22-1) and the tank body flange (21-3); the tank body (21) is characterized by further comprising at least three support legs (212) for supporting the tank body (21) to keep upright, wherein the support legs (212) are connected with the outer wall of the tank body (21) at equal intervals.

7. The sludge treatment system of claim 1, wherein: the settling tank (3) comprises a separation bin (32), a water collecting bin (33) with a water discharging opening (33-1) and an oil collecting bin (34) with an oil discharging opening (34-1) are respectively arranged at two ends of the separation bin (32), and the water collecting bin (33) and the oil collecting bin (34) can be communicated with the separation bin (32); an oil wiper (35) is installed at the top of the separation bin (32), a feeding hole (36) is formed in the side edge of the separation bin, a stirring mechanism (37) is installed at the bottom side of the separation bin (32), and a slag discharging pipeline (32-1) is connected to the bottom of the separation bin (32); the tops of the separation bin (32), the water collecting bin (33) and the oil collecting bin (34) are horizontal, and a box body (31) is sleeved on the outer side of the separation bin; a flow baffle plate (38) is arranged in the inner cavity of the separation bin (32) corresponding to the feed inlet (36); a compartment partition plate (39) is arranged between the inner cavity of the separation bin (32) and the inner cavity of the water collecting bin (33), and the compartment partition plate (39) and the flow baffle plate (38) are fixed through reinforcing ribs (310) arranged on the inner wall of the separation bin (32); the stirring mechanism (37) comprises a paddle shaft (37-1) which penetrates through the separation bin (32) and is provided with a paddle (37-2), and two ends of the paddle shaft (37-1) are fixed through a group of paddle shaft supporting plates (37-3) arranged on the outer wall of the separation bin (32) and driven by a motor (37-4) to rotate clockwise or anticlockwise; the bottom of the separation bin (32) is in an inverted triangle shape to form an inverted triangle cavity (32-2), the stirring mechanism (37) is positioned in the inverted triangle cavity (32-2), and the slag discharge pipeline (32-1) is positioned below the stirring mechanism (37).

8. The sludge treatment system of claim 1, wherein: the centrifuge (9) is supported by a centrifuge bracket (7), and the height of the centrifuge (9) is higher than that of the secondary treatment box (10).

9. The sludge treatment system of claim 8, wherein: the secondary treatment box (10) is a water circulation treatment box.

10. The sludge treatment system of claim 2, wherein: the ultrasonic processor (14) is an ultrasonic homogenizer.