An oil-water separation device for treating oily sludge and its usage method

Abstract

The invention relates to an oil-water separation device for treating oily sludge and a method for using the device, wherein the interior of a separation cylinder is heated by a blowing device, the oily sludge is introduced into a filter element of the separation cylinder from a channel in a hollow driving shaft, a microwave generator is turned on to heat the interior of the sludge, and the hot air from the blowing device is used to dry the oily sludge, so that the moisture therein is converted into water vapor and discharged from the separation cylinder; the filter element is driven to rotate by a power device, and the oil and water in the oily sludge are thrown out from the smaller filter holes of the filter element by centrifugal force; while the power device drives the driving shaft to rotate, the microwave generator is started, and an extrusion component on the driving shaft repeatedly extrudes the oily sludge, and while further discharging the oil and water, oil residue is squeezed out from a through hole on a first pressing plate in the extrusion component and accumulated in a space of the filter element close to a limit valve; when the volume of the oil residue accumulates to a certain extent, the limit valve is opened to discharge the oil residue, thereby achieving full separation of oil and water in the oily sludge.

Description

Technical Field

[0001] The present invention relates to the technical field of oily sludge separation equipment, and in particular to an oil-water separation equipment for treating oily sludge and a using method thereof. Background Art

[0002] In all stages of oil drilling, exploitation, storage, transportation, and refining, oily sludge will be generated in each link. Oily sludge is an oily solid waste with high toxicity and high pollution degree. With the gradual deepening of oil and gas field development, a large amount of oily sludge is generated every year, and the contradiction between the pollution impact it brings and the environment is becoming increasingly prominent.

[0003] In the treatment of oily sludge, since the oil completely penetrates into the sludge, the oil and sludge are mixed very tightly and stably, forming a suspension emulsion of a multiphase system. It has a high viscosity and is difficult to dehydrate. The water content of the oily sludge generated in the refinery is more than 80%. Due to the hydration effect and the charged property of the particles, it forms a relatively stable dispersion system. It is very difficult to break the stability of the oily sludge system by simply using centrifugal separation technology or high-temperature evaporation, and it is impossible to separate the deep-layer oil and water in the sludge. Summary of the Invention

[0004] The present invention provides an oil-water separation equipment for treating oily sludge and a using method thereof, which can effectively solve the problems in the background art.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] An oil-water separation equipment for treating oily sludge, including an installation frame and a separation device, a power device, and a blowing device arranged thereon. The separation device is driven by the power device and heated inside by the blowing device;

[0007] The separation device includes a separation cylinder and a filter element and a driving shaft arranged therein. The filter element is sleeved on the driving shaft and rotates coaxially with it. A guiding column is arranged in the separation cylinder, and an extrusion assembly is arranged in the filter element. The extrusion assembly is screwed to the driving shaft and slidably connected to the guiding column;

[0008] The driving shaft is connected to the power device. A microwave generator is arranged on the driving shaft. The microwave generator is located inside the filter element. A channel is arranged axially along the driving shaft inside the driving shaft. The feed port of the channel is located at the end of the driving shaft, and the discharge port of the channel is correspondingly arranged with the extrusion assembly.

[0009] Further, the separation cylinder includes a cylinder body and a limit valve and a cover plate arranged at both ends thereof. The guiding column is vertically arranged on the cover plate;

[0010] The limiting valve is detachably connected to the cylinder body, and the driving shaft passes through the cover plate and is connected to the power device.

[0011] Furthermore, the filter element includes a filter net and a mounting plate. The filter net is arranged in a cylindrical structure with both ends penetrating, and the mounting plate is arranged at one end of the filter net close to the cover plate and is fixedly connected to the driving shaft.

[0012] Furthermore, the extrusion assembly includes a first pressing plate and a second pressing plate arranged in parallel. Both the first pressing plate and the second pressing plate are slidably connected to the guide posts, and are respectively screwed to the driving shaft through a first slider and a second slider.

[0013] Furthermore, the discharge port is arranged to penetrate along the radial direction of the driving shaft and is located between the first pressing plate and the second pressing plate. The microwave generator is arranged close to the discharge port;

[0014] First external threads and second external threads are respectively arranged on the driving shaft on both sides of the discharge port. The first external threads and the second external threads have opposite helix directions, and the first slider and the second slider are respectively screwed to the first external threads and the second external threads.

[0015] Furthermore, the first pressing plate and the second pressing plate are respectively arranged close to the limiting valve and the cover plate. A plurality of through holes are formed in the first pressing plate, and the aperture of the through holes is larger than the aperture of the filter holes on the filter net.

[0016] Furthermore, the power device includes a motor, a synchronous belt and a synchronous pulley. The synchronous pulley is sleeved on the driving shaft and rotates coaxially therewith, and the motor drives the synchronous pulley to rotate through the synchronous belt.

[0017] Furthermore, the blowing device includes a blower, a heating device and a guide pipe. The heating device is respectively connected to the blower and the guide pipe, and is communicated with the separation cylinder through the guide pipe.

[0018] A usage method of an oil-water separation device for treating oily sludge, using the above-mentioned oil-water separation device for treating oily sludge, includes the following steps:

[0019] First, start the blowing device to heat the inside of the separation cylinder;

[0020] Secondly, introduce the oily sludge into the filter element of the separation cylinder through the internal channel of the driving shaft, and simultaneously start the microwave generator;

[0021] Finally, start the power device to drive the filter element in the separation cylinder to rotate, and at the same time drive the extrusion assembly to extrude the sludge in the filter element;

[0022] Open the limiting valve to discharge the oil residue.

[0023] Further, during the extrusion of the sludge in the filter element by the extrusion assembly, the oil residue gradually extrudes from the through holes on the first pressing plate;

[0024] When the volume of the oil residue accumulated in the space near the limit valve in the separation cylinder reaches the clearance limit value, the limit valve is opened to allow the oil residue to flow out.

[0025] The beneficial effects of the present invention are as follows:

[0026] In this application, the inside of the separation cylinder is heated by the blowing device, the oily sludge is introduced into the filter element of the separation cylinder through the channel in the hollow drive shaft, the microwave generator is turned on to heat the inside of the sludge, and the hot air of the blowing device is used to dry the oily sludge, so that the moisture in it becomes water vapor and is discharged from the separation cylinder;

[0027] The filter element is driven to rotate by the power device, and the oil and water in the oily sludge are thrown out from the smaller filter holes of the filter element by centrifugal force. While the power device drives the drive shaft to rotate, the microwave generator is started, and the extrusion assembly on the drive shaft repeatedly extrudes the oily sludge. While further discharging the oil and water, the oil residue is extruded from the through holes on the first pressing plate of the extrusion assembly and accumulates in the space of the filter element near the limit valve. When the volume of the oil residue accumulates to a certain extent, the limit valve is opened to discharge the oil residue, realizing the full separation of the oil and water in the oily sludge. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic structural diagram of the oil-water separation equipment for treating oily sludge in the present invention;

[0030] Figure 2 It is a schematic structural diagram of the separation device in the present invention;

[0031] Figure 3 It is a schematic internal structural diagram of the separation device in the present invention;

[0032] Figure 4 It is a schematic sectional structural diagram of the separation device in the present invention;

[0033] Figure 5 For Figure 3 The enlarged partial structural diagram at A in

[0034] Figure 6This is a schematic structural diagram of the installation frame, the power device and the blowing device thereon in the present invention.

[0035] Reference numerals: 1, installation frame; 2, separation device; 21, separation cylinder; 211, cylinder body; 212, limit valve; 213, cover plate; 214, guide post; 22, filter element; 221, filter net; 222, mounting plate; 23, drive shaft; 231, channel; 232, feed port; 233, discharge port; 234, first external thread; 235, second external thread; 24, extrusion assembly; 241, first pressing plate; 241a, through hole; 242, second pressing plate; 243, first slider; 244, second slider; 25, microwave generator; 3, power device; 31, motor; 32, synchronous belt; 33, synchronous pulley; 4, blowing device; 41, blower; 42, heating device; 43, air duct. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0037] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a middle element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used herein in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0039] As Figures 1 to 6 shown, an oil-water separation device for treating oily sludge and its use method include an installation frame 1 and a separation device 2, a power device 3 and a blowing device 4 provided thereon. The separation device 2 is driven by the power device 3 and internally heated by the blowing device 4;

[0040] The separation device 2 includes a separation cylinder 21, a filter element 22 and a drive shaft 23 arranged therein. The filter element 22 is sleeved on the drive shaft 23 and rotates coaxially therewith. A guide post 214 is arranged in the separation cylinder 21, and an extrusion assembly 24 is arranged in the filter element 22. The extrusion assembly 24 is screwed to the drive shaft 23 and slidably connected to the guide post 214;

[0041] The drive shaft 23 is connected to the power device 3. A microwave generator 25 is arranged on the drive shaft 23. The microwave generator 25 is located inside the filter element 22. A channel 231 is arranged axially inside the drive shaft 23. The feed port 232 of the channel 231 is located at the end of the drive shaft 23, and the discharge port 233 of the channel 231 is arranged corresponding to the extrusion assembly 24.

[0042] In this application, the inside of the separation cylinder 21 is heated by the blowing device 4. The oily sludge is introduced into the filter element 22 of the separation cylinder 21 from the channel 231 inside the hollow drive shaft 23. The microwave generator 25 is turned on to heat the inside of the sludge, and the hot air of the blowing device 4 is used to dry the oily sludge, so that the water therein becomes water vapor and is discharged from the separation cylinder 21;

[0043] The power device 3 is used to drive the filter element 22 to rotate, and the oil and water in the oily sludge are thrown out from the smaller filter holes of the filter element 22 by centrifugal force. While the power device 3 drives the drive shaft 23 to rotate, the microwave generator 25 is started. The extrusion assembly 24 on the drive shaft 23 repeatedly extrudes the oily sludge. While further discharging the oil and water, the oil residue is extruded from the through hole 241a on the first pressing plate 241 of the extrusion assembly 24 and accumulates in the space of the filter element 22 near the limit valve 212. When the volume of the oil residue accumulates to a certain extent, the limit valve 212 is opened to discharge the oil residue, realizing the full separation of the oil and water in the oily sludge.

[0044] In the present invention, the sludge is quickly dried by the blowing device 4 and the microwave generator 25. The blowing device 4 heats the surface of the sludge, while the microwave of the microwave generator 25 is generated inside the object to be heated. The heat source comes from inside the object. The selectivity of using microwave to heat an object is utilized, that is, microwave is more likely to heat a medium with a large dielectric constant, and it is very difficult to heat a medium with too small a dielectric constant by microwave. The dielectric constant of water is about 80, while the dielectric constant of oil is 2 - 3. The coalescence opportunity of the dispersed phase droplets increases, promoting the acceleration of the oil-water separation speed.

[0045] As Figure 2 and Figure 3 shown, the separation cylinder 21 includes a cylinder body 211, a limit valve 212 and a cover plate 213 arranged at both ends thereof. The guide post 214 is vertically arranged on the cover plate 213; the limit valve 212 is detachably connected to the cylinder body 211, and the drive shaft 23 passes through the cover plate 213 and is connected to the power device 3.

[0046] The filter element 22 includes a filter net 221 and a mounting plate 222. The filter net 221 is arranged in a cylindrical structure with both ends penetrating. The mounting plate 222 is arranged at one end of the filter net 221 close to the cover plate 213 and is fixedly connected to the drive shaft 23.

[0047] The extrusion assembly 24 includes a first pressing plate 241 and a second pressing plate 242 arranged in parallel. Both the first pressing plate 241 and the second pressing plate 242 are slidably connected to the guide post 214, and are respectively screwed to the drive shaft 23 through a first slider 243 and a second slider 244.

[0048] In this embodiment, the first pressing plate 241 and the second pressing plate 242 arranged in the filter element 22 cooperate with the filter net 221 to form a receiving cavity. The oily sludge is introduced from the feed port 232 of the drive shaft 23 and is introduced into the receiving cavity through the channel 231 in the drive shaft 23. When the drive shaft 23 drives the filter element 22 to rotate, the oil and water in the sludge are discharged from the filter holes on the filter net 221 through centrifugal force.

[0049] The sludge is extruded by the extrusion assembly 24 arranged in the filter element 22. Specifically, the first pressing plate 241 and the second pressing plate 242 screwed to the drive shaft 23 move relative to each other, that is, the sludge between the two pressing plates is extruded when the two pressing plates approach or move away from each other.

[0050] Wherein, the first pressing plate 241 and the second pressing plate 242 are respectively screwed through the first slider 243 and the second slider 244. Both pressing plates are sleeved on the drive shaft 23 but do not rotate with the drive shaft 23. Specifically, the rotation of the two pressing plates is restricted by the guide shaft fixedly arranged with the separation cylinder 21, so that when the drive shaft 23 rotates, the first pressing plate 241 and the second pressing plate 242 can respectively move axially along the first external thread 234 and the second external thread 235.

[0051] In this embodiment, as Figure 4 and Figure 5 shown, the discharge port 233 is arranged to penetrate the drive shaft 23 radially and is located between the first pressing plate 241 and the second pressing plate 242. The microwave generator 25 is arranged close to the discharge port 233. The first external thread 234 and the second external thread 235 are respectively arranged on the drive shaft 23 on both sides of the discharge port 233. The first external thread 234 and the second external thread 235 have opposite helix directions. The first slider 243 and the second slider 244 are respectively screwed to the first external thread 234 and the second external thread 235.

[0052] During the process of the power device 3 driving the rotation of the rotating shaft, the first pressing plate 241 and the second pressing plate 242 that are movably screwed to the synchronous belt 32 of the rotating shaft approach or move away from each other, and the external thread directions connected to the first slider 243 and the second slider 244 are set to be opposite; by rotating the driving shaft 23 in opposite thread directions respectively, the relative movement of the two pressing plates sleeved thereon is realized.

[0053] The first pressing plate 241 and the second pressing plate 242 are respectively arranged close to the limit valve 212 and the cover plate 213, and a plurality of through holes 241a are formed in the first pressing plate 241, and the aperture of the through holes 241a is larger than the aperture of the filter holes on the filter net 221.

[0054] During the relative movement of the first pressing plate 241 and the second pressing plate 242, the first pressing plate 241 is arranged close to the limit valve 212, and a plurality of through holes 241a are formed therein. During the extrusion process of the sludge by the extrusion assembly 24, along with the vaporization of water and the drying of the sludge, the oil residue is extruded from the through holes 241a on the first pressing plate 241, facilitating the discharge of the oil residue.

[0055] In this application, as Figure 6 shown, the power device 3 includes a motor 31, a synchronous belt 32 and a synchronous pulley 33. The synchronous pulley 33 is sleeved on the driving shaft 23 and rotates coaxially therewith, and the motor 31 drives the synchronous pulley 33 to rotate through the synchronous belt 32. The blowing device 4 includes a blower 41, a heating device 42 and a guide air pipe 43. The heating device 42 is respectively connected to the blower 41 and the guide air pipe 43, and is connected to the separation cylinder 21 through the guide air pipe 43.

[0056] The present invention further discloses a usage method of an oil-water separation device for treating oily sludge, including the following steps:

[0057] First, start the blowing device 4 to heat the inside of the separation cylinder 21;

[0058] Secondly, introduce the oily sludge into the filter element 22 of the separation cylinder 21 through the internal channel 231 of the driving shaft 23, and simultaneously start the microwave generator 25;

[0059] Finally, start the power device 3 to drive the filter element 22 in the separation cylinder 21 to rotate, and at the same time drive the extrusion assembly 24 to extrude the sludge in the filter element 22;

[0060] Open the limit valve 212 to discharge the oil residue.

[0061] Among them, during the process of extruding the sludge in the filter element 22 by the extrusion assembly 24, the oil residue gradually extrudes from the through holes 241a on the first pressing plate 241;

[0062] When the volume of the oil residue accumulated in the space near the limit valve 212 in the separation cylinder 21 reaches the clearance limit value, open the limit valve 212 to make the oil residue flow out.

[0063] Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil-water separation device for treating oily sludge, characterized in that, it includes: an installation frame and a separation device, a power device and a blowing device arranged thereon. The separation device is driven by the power device and heated inside by the blowing device; the separation device includes a separation cylinder and a filter element and a driving shaft arranged therein. The filter element is sleeved on the driving shaft and rotates coaxially therewith. A guide post is arranged in the separation cylinder, and an extrusion assembly is arranged in the filter element. The extrusion assembly is screwed to the driving shaft and slidably connected to the guide post; the driving shaft is connected to the power device, and a microwave generator is arranged on the driving shaft. The microwave generator is located inside the filter element. A channel is arranged axially inside the driving shaft. The feed port of the channel is located at the end of the driving shaft, and the discharge port of the channel is arranged corresponding to the extrusion assembly; the extrusion assembly includes a first pressing plate and a second pressing plate arranged in parallel. Both the first pressing plate and the second pressing plate are slidably connected to the guide post and are respectively screwed to the driving shaft through a first slider and a second slider; the discharge port is arranged to penetrate radially along the driving shaft and is located between the first pressing plate and the second pressing plate. The microwave generator is arranged close to the discharge port; first external threads and second external threads are respectively arranged on the driving shaft on both sides of the discharge port. The first external threads and the second external threads have opposite helix directions. The first slider and the second slider are respectively screwed to the first external threads and the second external threads.

2. The oil-water separation device for treating oily sludge according to claim 1, characterized in that, the separation cylinder includes a cylinder body and a limit valve and a cover plate arranged at both ends thereof. The guide post is vertically arranged on the cover plate; the limit valve is detachably connected to the cylinder body, and the driving shaft passes through the cover plate and is connected to the power device.

3. The oil-water separation device for treating oily sludge according to claim 2, characterized in that, the filter element includes a filter net and a mounting plate. The filter net is arranged as a columnar structure with both ends penetrating. The mounting plate is arranged at one end of the filter net close to the cover plate and is fixedly connected to the driving shaft.

4. The oil-water separation device for treating oily sludge according to claim 3, characterized in that, the first pressing plate and the second pressing plate are respectively arranged close to the limit valve and the cover plate. A plurality of through holes are formed in the first pressing plate, and the aperture of the through holes is larger than the aperture of the filter holes on the filter net.

5. The oil-water separation device for treating oily sludge according to claim 2, characterized in that, the power device includes a motor, a synchronous belt and a synchronous pulley. The synchronous pulley is sleeved on the driving shaft and rotates coaxially therewith. The motor drives the synchronous pulley to rotate through the synchronous belt.

6. The oil-water separation device for treating oily sludge according to claim 1, characterized in that, the blowing device includes a blower, a heating device and a guide pipe. The heating device is respectively connected to the blower and the guide pipe and is communicated with the separation cylinder through the guide pipe.

7. A method for using an oil-water separation device for treating oily sludge, characterized in that, using the oil-water separation device for treating oily sludge according to any one of claims 1 to 6 above, comprising the following steps: First, start the blowing device to heat the inside of the separation cylinder; Secondly, introduce the oily sludge into the filter element of the separation cylinder through the internal channel of the drive shaft, and simultaneously start the microwave generator; Finally, start the power device to drive the filter element in the separation cylinder to rotate, and at the same time drive the extrusion assembly to extrude the sludge in the filter element; Open the limit valve to discharge the oil residue.

8. According to the method for using an oil-water separation device for treating oily sludge as claimed in claim 7, characterized in that, during the process of extruding the sludge in the filter element by the extrusion assembly, the oil residue gradually extrudes from the through holes on the first pressing plate; When the volume of the oil residue accumulated in the space near the limit valve in the separation cylinder reaches the clearance limit value, open the limit valve to allow the oil residue to flow out.

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