Harmless sewage treatment equipment for waste engine oil recovery process

Abstract

The invention discloses harmless sewage treatment equipment for a waste engine oil recovery process, and relates to the technical field of sewage treatment. The device specifically comprises a separation tank body, a connecting cylinder cover and a separation rotating cylinder, a connecting ring seat and a supporting ring seat are fixedly mounted at the top and the bottom of the outer wall of the separation rotating cylinder respectively and are both rotationally connected with the inner wall of the top of the separation tank body, and the connecting cylinder cover is fixedly mounted at the top end of the separation rotating cylinder. According to the sewage harmless treatment equipment, through cooperation of the separation rotary drum, the precipitation drum and the separation filter drum, harmless treatment is carried out on small-batch waste engine oil recovery sewage, the process can be continuously carried out, the requirement for the weight of the waste engine oil recovery sewage is relatively low, the treatment speed is high, the effect is good, and meanwhile through cooperation of the separation oil well pump, the treatment efficiency is high. Secondary oil-water separation can be carried out on waste engine oil recovery sewage, the engine oil content in the waste engine oil recovery sewage is reduced, and the sewage treatment effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to sewage harmless treatment equipment in a waste oil recovery process. Background Art

[0002] Motor oil, also known as engine lubricant, is known as the "blood" of a car. It can lubricate, clean, cool, seal, reduce wear, prevent rust and corrosion for the engine. After long-term use, the motor oil needs to be discharged and replaced.

[0003] The basic steps of waste oil regeneration include: pretreatment: sedimentation and filtration of waste oil to remove moisture, dust and other impurities; sedimentation and filtration: removal of larger solid particles and suspended matter by sedimentation and filtration; acid and alkali washing: acid and alkali treatment of oil to neutralize the acidic substances and further purify the oil; distillation: removal of moisture and other volatile components in the oil by distillation. In the process of recycling and regeneration of waste oil, a lot of wastewater will be generated, which cannot be discharged directly and needs to be harmlessly treated.

[0004] After searching, the Chinese patent application number 202022439427.5 discloses a refinery wastewater treatment device, which includes a saline wastewater treatment system and an oily wastewater treatment system; the saline wastewater treatment system includes a pretreatment unit, a primary biochemical treatment unit, a primary sedimentation tank, a secondary biochemical treatment unit, a secondary sedimentation tank and a security unit connected in sequence by pipelines; the oily wastewater treatment system includes a pretreatment unit, a primary biochemical treatment unit, a primary sedimentation tank, a secondary biochemical treatment unit, a secondary sedimentation tank and a security unit connected in sequence by pipelines.

[0005] The refinery wastewater treatment device in the above-mentioned patent has the following shortcomings: the refinery wastewater treatment device is suitable for single large-scale wastewater treatment, and the amount of wastewater treated at one time is large, but the corresponding wastewater treatment time is long. During the wastewater treatment process, a large amount of materials are required for various wastewater treatments, and the difficulty of wastewater treatment is relatively large. When the amount of wastewater cannot meet the needs of one-time treatment, it is not suitable to use this method for wastewater treatment in the waste oil recovery process. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a wastewater harmless treatment device for a waste oil recovery process.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A wastewater harmless treatment equipment for waste oil recovery process, comprising: a separation tank body, a connecting cylinder cover and a separation drum, wherein the top and bottom of the outer wall of the separation drum are respectively fixedly mounted with a connecting ring seat and a supporting ring seat, wherein the connecting ring seat and the supporting ring seat are both rotatably connected to the top inner wall of the separation tank body, the connecting cylinder cover is fixedly mounted on the top of the separation drum, and a protective sleeve is integrally formed at the top of the connecting cylinder cover, and an outward-turned skirt is arranged at the bottom end of the protective sleeve; a sliding oil pipe is arranged inside the connecting cylinder cover, and the top end of the sliding oil pipe is fixedly mounted on the top of the separation drum, and a protective sleeve is integrally formed at the top of the connecting cylinder cover, and an outward-turned skirt is arranged at the bottom end of the protective sleeve; a sliding oil pipe is arranged inside the connecting cylinder cover, and the top end of the sliding oil pipe is fixedly mounted on the top of the connecting cylinder cover, and the protective sleeve is integrally formed on ... An oil suction hose is fixedly installed, one end of the oil suction hose is connected to a separation oil suction pump, and an oil discharge pipe is fixedly installed at the outlet of the separation oil suction pump; a driving motor is arranged on the upper part of the outer wall of the separation tank body, and the output shaft of the driving motor passes through the separation tank body and extends to the interior of the separation tank body, and a driving bevel gear is fixedly installed on the extended end thereof, and the driving bevel gear is meshingly connected with a driven bevel gear ring, and the driven bevel gear ring is fixedly installed on the middle part of the outer wall of the separation drum; a sedimentation drum is arranged at the bottom end of the separation drum, and a separation filter drum is arranged at the bottom end of the sedimentation drum.

[0009] As a preferred embodiment of the present invention: a protective top plate is provided at the bottom end of the separation oil pump, and the protective top plate is arranged at the top of the separation tank body. An adjusting nut is threadedly sleeved on the outer wall of the sliding oil pipe, and a limiting sleeve is slidingly sleeved on the bottom end of the sliding oil pipe, and the limiting sleeve is fixedly connected to the protective top plate.

[0010] On the basis of the above-mentioned scheme: a support arm is fixedly installed on one side of the upper surface of the protective top plate, a sewage inlet pipe is fixedly installed on the top of the support arm, one end of the sewage inlet pipe passes through the protective top plate and is inserted into the protective sleeve.

[0011] As a preferred embodiment of the present invention: a connecting clamp ring is fixedly connected to the middle of the outer wall of the connecting cylinder cover, and a sealing rubber ring is fixedly sleeved on the bottom of the outer wall of the connecting cylinder cover.

[0012] On the basis of the above scheme: a supporting clamp is provided at the bottom end of the connecting clamp, and the supporting clamp is fixedly connected to the top of the separation drum. A plurality of limiting pins are fixedly connected to the top of the connecting ring seat at equal distances, and the limiting pins pass through the supporting clamp and the connecting clamp.

[0013] As a preferred embodiment of the present invention: a positioning connection seat is fixedly installed on the bottom end of the support ring seat, a stirring shaft is fixedly installed on the bottom end of the positioning connection seat, and a plurality of stirring blades are fixedly connected to the outer wall of the stirring shaft at equal intervals.

[0014] As a preferred embodiment of the present invention: the outer part of the separation filter cylinder is fixedly sleeved with a bottom connecting cylinder, and the bottom connecting cylinder is fixedly installed at the bottom end of the separation tank body.

[0015] On the basis of the above scheme: a filter disc is fixedly installed in the bottom inner cavity of the separation filter cartridge, and a drain pipe is fixedly connected to the bottom end of the separation filter cartridge, and the drain pipe runs through the bottom cylinder of the bottom end connection cylinder.

[0016] As a preferred embodiment of the present invention: a support ring plate is fixedly connected to the middle of the outer wall of the separation tank body, a plurality of support columns are fixedly installed at equal intervals on the bottom end of the support ring plate, and a bearing base is fixedly connected to the bottom ends of the plurality of support columns.

[0017] As a preferred embodiment of the present invention: a connecting pipe head is fixedly installed at one end of the oil extraction hose, and the connecting pipe head is fixedly installed at the top end of the sliding oil pipe.

[0018] The beneficial effects of the present invention are:

[0019] 1. The wastewater harmless treatment equipment can harmlessly treat a small batch of waste oil recovery wastewater through the cooperation of a separation drum, a sedimentation drum and a separation filter drum. The process can be carried out continuously, and the weight requirement for the waste oil recovery wastewater is relatively low. The processing speed is fast and the effect is excellent. At the same time, in conjunction with a separation oil pump, the waste oil recovery wastewater can be subjected to secondary oil-water separation, thereby reducing the oil content in the waste oil recovery wastewater and improving the wastewater treatment effect.

[0020] 2. The harmless sewage treatment equipment drives the stirring shaft and stirring blades to rotate through the supporting ring seat, so that the reagents for adjusting the pH value of the separated sewage and ferrous sulfate are fully mixed with the separated sewage, thereby improving the precipitation speed and effect of impurities; the activated carbon and nano copper balls built into the filter disc can further purify the sewage, improve the sewage treatment effect, and shorten the treatment time of the subsequent biological treatment tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the overall assembly of the present invention;

[0022] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the overall assembly of the present invention;

[0023] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 5 For the present invention Figure 2 Schematic diagram of the enlarged structure at C in the middle;

[0026] Figure 6 For the present invention Figure 2Schematic diagram of the enlarged structure at D in the middle.

[0027] In the figure: 1. bearing base; 2. supporting column; 3. supporting ring plate; 4. separation tank; 5. connecting ring plate; 6. protective top plate; 7. supporting arm; 8. sewage inlet pipe; 9. separation oil pump; 10. oil pump hose; 11. sliding oil pipe; 12. oil discharge pipe; 13. motor bracket; 14. driving motor; 15. bottom connecting cylinder; 16. connecting pipe head; 17. adjusting nut; 18. limiting sleeve; 19. protective sleeve; 20. connecting cylinder cover; 21. connecting clamp ring; 22. support Snap ring; 23, separation drum; 24, connecting ring seat; 25, load-bearing bearing; 26, limit pin; 27, sealing rubber ring; 28, driving bevel gear; 29, driven bevel gear ring; 30, support ring seat; 31, support bearing; 32, auxiliary material conduit; 33, positioning connecting seat; 34, stirring shaft; 35, stirring blade; 36, water outlet; 37, control valve one; 38, sedimentation cylinder; 39, discharge pipe; 40, control valve two; 41, separation filter cylinder; 42, filter disc; 43, drain pipe. DETAILED DESCRIPTION

[0028] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0029] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] A wastewater harmless treatment equipment for waste oil recovery process, such as Figures 1 to 6 As shown, it includes: a separation tank body 4, a connecting cylinder cover 20 and a separation drum 23, a sedimentation drum 38 is arranged at the bottom end of the separation drum 23, and a separation filter drum 41 is arranged at the bottom end of the sedimentation drum 38; the sewage in the waste oil recovery process is subjected to preliminary filtration (mainly filtering out the existing solid impurities in the sewage and the oil floating on the sewage) to obtain filtered sewage, and the filtered sewage is introduced into the separation drum 23, and after centrifugal filtration, the oil and water are separated, the upper part is the oil, and the lower part is the separated sewage, and then the separated sewage is introduced into the sedimentation drum 38, and an appropriate amount of ferrous sulfate is added to the separated sewage in the sedimentation drum 38, and the pH value of the separated sewage is adjusted to precipitate impurities in the separated sewage to obtain purified sewage, and then introduced into the separation filter drum 41, the precipitate is separated from the purified sewage, and the purified sewage is further purified in the separation filter drum 41, discharged from the device, and introduced into the biological treatment tank for final treatment, and purified water is obtained after the treatment is completed.

[0031] Embodiment 1;

[0032] A support ring plate 3 is fixedly connected to the middle of the outer wall of the separation tank body 4, and a plurality of plug-in cartridges are equidistantly welded to the bottom end of the support ring plate 3. A support column 2 is fixedly installed inside the plug-in cartridge. A bearing base 1 is fixedly connected to the bottom ends of the plurality of support columns 2. The bearing base 1 maintains the stability of the overall device.

[0033] A connecting ring seat 24 and a supporting ring seat 30 are fixedly installed on the top and bottom of the outer wall of the separation drum 23, respectively. A load-bearing bearing 25 is fixedly sleeved on the outer wall of the connecting ring seat 24, and a support bearing 31 is fixedly sleeved on the outer wall of the support ring seat 30. The outer rings of the support bearing 31 and the load-bearing bearing 25 are fixedly connected to the inner wall of the separation tank body 4.

[0034] The connecting cylinder cover 20 is inserted into the top of the inner cavity of the separation drum 23, and a sealing rubber ring 27 is fixedly sleeved on the bottom end of the outer wall of the connecting cylinder cover 20 to improve the sealing performance of the connection between the connecting cylinder cover 20 and the separation drum 23; Figure 3 As shown, a protective sleeve 19 is integrally formed at the top of the connecting cylinder cover 20, and an outward-turned skirt is provided at the bottom end of the protective sleeve 19. The outer side of the skirt is higher than the bottom end of the protective sleeve 19, so as to prevent sewage from flying out through the protective sleeve 19 during the rotation of the separation drum 23; the volume of the connecting cylinder cover 20 is one third of the volume of the separation drum 23.

[0035] A connecting clamp 21 is fixedly connected to the middle of the outer wall of the connecting cylinder cover 20, and a supporting clamp 22 is arranged at the bottom end of the connecting clamp 21. The supporting clamp 22 is fixedly connected to the top of the separation drum 23, and a plurality of limiting pins 26 are fixedly connected to the top of the connecting ring seat 24 at equal intervals. The limiting pins 26 penetrate the supporting clamp 22 and the connecting clamp 21 and extend upward, and a fixing nut is threadedly installed at the extended end thereof, so that the connecting cylinder cover 20 is tightly connected to the separation drum 23; the separation drum 23 is integrally formed with a water outlet 36, and a control valve 37 is fixedly installed at the bottom end of the water outlet 36, so as to control the amount of sewage inside the separation drum 23.

[0036] A connecting ring plate 5 is integrally formed at the top of the outer wall of the separation tank body 4, a protective top plate 6 is fixedly installed on the upper surface of the connecting ring plate 5, a support arm 7 is fixedly installed on one side of the upper surface of the protective top plate 6, a sewage inlet pipe 8 is fixedly installed on the top of the support arm 7, one end of the sewage inlet pipe 8 passes through the protective top plate 6 and is inserted into the protective sleeve 19, the sewage inlet pipe 8 is connected to an external sewage supply pump to facilitate the continuous injection of sewage into the separation drum 23.

[0037] A separation oil pump 9 is fixedly installed on the other side of the upper surface of the protective top plate 6, and an oil suction hose 10 is fixedly installed at the inlet of the separation oil pump 9, and a connecting pipe head 16 is fixedly installed at the end of the oil suction hose 10, and a sliding oil pipe 11 is fixedly installed at the end of the connecting pipe head 16, and a limiting sleeve 18 is sleeved on the bottom end of the outer wall of the sliding oil pipe 11, and the limiting sleeve 18 is welded to the upper surface of the protective top plate 6; and an oil drain pipe 12 is fixedly installed at the outlet of the separation oil pump 9, and the oil drain pipe 12 is used to drain the engine oil.

[0038] The sliding oil pipe 11 passes through the protective top plate 6 and extends downward, and its extended end is arranged inside the protective sleeve 19, and the outer wall of the sliding oil pipe 11 is provided with a limiting slide groove, and the inner wall of the limiting sleeve 18 is integrally formed with a limiting slider that is slidably engaged in the limiting slide groove; the threaded sleeve of the sliding oil pipe 11 is connected with an adjusting nut 17, and the adjusting nut 17 is used to adjust the depth of the sliding oil pipe 11 inserted into the separation drum 23, so as to facilitate the extraction of the engine oil separated from the sewage.

[0039] A motor bracket 13 is fixedly installed on the upper part of the outer wall of the separation tank body 4, and a driving motor 14 is fixedly installed on the top of the motor bracket 13. The output shaft of the driving motor 14 passes through the separation tank body 4 and extends to the inside of the separation tank body 4. A driving bevel gear 28 is fixedly installed on the extended end thereof. The driving bevel gear 28 is meshingly connected with a driven bevel gear ring 29, and the driven bevel gear ring 29 is fixedly installed in the middle part of the outer wall of the separation drum 23.

[0040] When the present embodiment is in use, firstly, the adjusting nut 17 is rotated to the lower part of the sliding oil pipe 11, so that the bottom end of the sliding oil pipe 11 is inside the protective sleeve 19; then, the filtered sewage is introduced into the sewage introduction pipe 8 through the external sewage supply pump, and then injected into the separation drum 23 (at this time, the control valve 137 is in a closed state), until the filtered sewage fills the separation drum 23; then, the driving motor 14 is started, and the driving motor 14 drives the separation drum 23 to rotate at a high speed through the engagement of the driving bevel gear 28 and the driven bevel gear ring 29, and the speed of the separation drum 23 is 3,000 revolutions per minute; the separation drum 23 rotates for ten to thirty minutes, stops rotating, and the engine oil carried by the filtered sewage is separated, with the upper part being the engine oil and the lower part being the separated sewage; then, the control valve 137 is opened, and the separated sewage is discharged through the outlet 36, so that the engine oil remains inside the separation drum 23; then, the filtered sewage is again Inject into the separation drum 23 so that the separation drum 23 is filled with separated sewage and oil, and centrifuge again; repeat five to ten times so that the separated oil reaches the extraction standard of the separation oil pump 9; after injecting filtered sewage for the last time and completing centrifugal separation, rotate the adjusting nut 17 to the upper part of the sliding oil pipe 11 so that the bottom of the sliding oil pipe 11 is inserted into the oil, and then start the separation oil pump 9 to extract the oil and then discharge the separated sewage; repeat the above operation and continue to perform small batches of filtered sewage purification treatment; Note: When discharging separated sewage, an appropriate amount of separated sewage should be retained in the separation drum 23 to avoid oil discharge; when extracting the oil, the oil cannot be completely extracted, and a certain distance is set between the sliding oil pipe 11 and the interface between the separated sewage and the oil. The size of the distance is determined by the diameter of the sliding oil pipe 11 and the power of the separation oil pump 9.

[0041] Embodiment 2:

[0042] The sedimentation cylinder 38 is fixedly installed at the bottom of the inner cavity of the separation tank body 4, and a positioning connecting seat 33 is fixedly installed at the bottom end of the support ring seat 30, and a stirring shaft 34 is fixedly installed at the bottom end of the positioning connecting seat 33. A plurality of stirring blades 35 are fixedly connected to the outer wall of the stirring shaft 34 at equal intervals, and the lower part of the stirring shaft 34 and the plurality of stirring blades 35 are all located inside the sedimentation cylinder 38.

[0043] An auxiliary material conduit 32 is provided on one side of the top of the sedimentation cylinder 38, and the auxiliary material conduit 32 is welded to the separation tank body 4, so as to facilitate the introduction of reagents and ferrous sulfate for adjusting the pH value of the separated sewage into the sedimentation cylinder 38; the stirring shaft 34 and the stirring blade 35 make the reagents and ferrous sulfate fully blend with the separated sewage, so as to facilitate the precipitation and precipitation of impurities in the separated sewage; a discharge pipe 39 is integrally formed at the bottom end of the sedimentation cylinder 38, and a control valve 2 40 is fixedly installed at the bottom end of the discharge pipe 39.

[0044] The outside of the separation filter cylinder 41 is fixedly sleeved with a bottom connecting cylinder 15, and the bottom connecting cylinder 15 is fixedly installed on the bottom end of the separation tank body 4. The bottom inner cavity of the separation filter cylinder 41 is fixedly installed with a filter plate 42, and the bottom end of the separation filter cylinder 41 is fixedly connected with a drain pipe 43, which runs through the bottom cylinder of the bottom connecting cylinder 15.

[0045] like Figure 6 As shown, the main body of the filter disc 42 is configured as two porous concave discs, which are symmetrically arranged to prevent precipitated impurities from piling up and affecting the discharge of purified sewage. At the same time, the space between the two porous concave discs is filled with activated carbon and nano copper balls to further filter and purify the purified sewage, thereby reducing the processing time of the subsequent biological treatment tank.

[0046] On the basis of Example 1, when this embodiment is in use, after the separated sewage inside the separation drum 23 flows into the sedimentation drum 38, a reagent for adjusting the pH value of the separated sewage and an appropriate amount of ferrous sulfate are introduced through the auxiliary material conduit 32. When the separation drum 23 rotates again, the stirring shaft 34 is driven to rotate through the support ring seat 30 and the positioning connection seat 33, and the stirring shaft 34 drives the stirring plate 35 to stir the separated sewage, so that the reagent for adjusting the pH value of the separated sewage and the ferrous sulfate are fully mixed with the separated sewage, so as to achieve the purpose of adjusting the pH value of the separated sewage and precipitating impurities; after the stirring shaft 34 stirs for five to ten minutes, the control valve 2 40 is opened to discharge the precipitated precipitate and the purified sewage into the separation filter drum 41 simultaneously, and the filter disc 42 retains the precipitate in the separation filter drum 41. The purified sewage is purified by activated carbon and nano copper balls and then discharged through the drain pipe 43.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A wastewater harmless treatment equipment for waste oil recovery process, characterized in that: include: A separation tank body (4), a connecting cylinder cover (20) and a separation rotating cylinder (23), wherein a connecting ring seat (24) and a supporting ring seat (30) are respectively fixedly installed on the top and bottom of the outer wall of the separation rotating cylinder (23), and the connecting ring seat (24) and the supporting ring seat (30) are both rotatably connected to the top inner wall of the separation tank body (4); the connecting cylinder cover (20) is fixedly installed on the top of the separation rotating cylinder (23), and a protective sleeve (19) is integrally formed on the top of the connecting cylinder cover (20), and an outward-turned skirt is arranged at the bottom end of the protective sleeve (19); a sliding oil pipe (11) is arranged inside the connecting cylinder cover (20), and an oil extraction hose (10) is fixedly installed on the top of the sliding oil pipe (11). One end of the oil extraction hose (10) is connected to a separation oil extraction pump (9), and an oil discharge pipe (12) is fixedly installed at the outlet of the separation oil extraction pump (9); a driving motor (14) is arranged at the upper part of the outer wall of the separation tank body (4), and the output shaft of the driving motor (14) passes through the separation tank body (4) and extends to the inside of the separation tank body (4), and a driving bevel gear (28) is fixedly installed at its extended end, and the driving bevel gear (28) is meshingly connected with a driven bevel gear ring (29), and the driven bevel gear ring (29) is fixedly installed in the middle part of the outer wall of the separation drum (23); a sedimentation drum (38) is arranged at the bottom end of the separation drum (23), and a separation filter drum (41) is arranged at the bottom end of the sedimentation drum (38).

2. The wastewater harmless treatment equipment for waste oil recovery process according to claim 1 is characterized by: The bottom end of the separation oil pump (9) is provided with a protective top plate (6), and the protective top plate (6) is arranged at the top end of the separation tank body (4). The outer wall of the sliding oil pipe (11) is threadedly sleeved with an adjusting nut (17), and the bottom end of the sliding oil pipe (11) is slidably sleeved with a limiting sleeve (18), and the limiting sleeve (18) is fixedly connected to the protective top plate (6).

3. The wastewater harmless treatment equipment for waste oil recovery process according to claim 2 is characterized by: A support arm (7) is fixedly mounted on one side of the upper surface of the protective top plate (6), a sewage inlet pipe (8) is fixedly mounted on the top of the support arm (7), and one end of the sewage inlet pipe (8) passes through the protective top plate (6) and is inserted into the interior of the protective sleeve (19).

4. The wastewater harmless treatment equipment for waste oil recovery process according to claim 1 is characterized by: A connecting clamp ring (21) is fixedly connected to the middle of the outer wall of the connecting tube cover (20), and a sealing rubber ring (27) is fixedly sleeved on the bottom of the outer wall of the connecting tube cover (20).

5. The wastewater harmless treatment equipment for waste oil recovery process according to claim 4 is characterized by: A supporting clamp (22) is provided at the bottom end of the connecting clamp (21), and the supporting clamp (22) is fixedly connected to the top end of the separation drum (23). A plurality of limiting pins (26) are fixedly connected at equal intervals to the top end of the connecting ring seat (24), and the limiting pins (26) penetrate the supporting clamp (22) and the connecting clamp (21).

6. The wastewater harmless treatment equipment for waste oil recovery process according to claim 1 is characterized by: A positioning connection seat (33) is fixedly mounted on the bottom end of the support ring seat (30), a stirring shaft (34) is fixedly mounted on the bottom end of the positioning connection seat (33), and a plurality of stirring blades (35) are fixedly connected to the outer wall of the stirring shaft (34) at equal intervals.

7. The wastewater harmless treatment equipment for waste oil recovery process according to claim 1 is characterized by: The outside of the separation filter cylinder (41) is fixedly sleeved with a bottom connection cylinder (15), and the bottom connection cylinder (15) is fixedly installed on the bottom end of the separation tank body (4).

8. The wastewater harmless treatment equipment for waste oil recovery process according to claim 7 is characterized by: A filter disc (42) is fixedly mounted in the bottom inner cavity of the separation filter cylinder (41), and a drainage pipe (43) is fixedly connected to the bottom end of the separation filter cylinder (41), wherein the drainage pipe (43) passes through the bottom cylinder body of the bottom end connection cylinder (15).

9. The wastewater harmless treatment equipment for waste oil recovery process according to claim 1 is characterized by: A support ring plate (3) is fixedly connected to the middle of the outer wall of the separation tank body (4), a plurality of support columns (2) are fixedly installed at equal distances on the bottom end of the support ring plate (3), and a bearing base (1) is fixedly connected to the bottom ends of the plurality of support columns (2).

10. The wastewater harmless treatment equipment for waste oil recovery process according to claim 1, characterized in that: A connecting pipe head (16) is fixedly mounted on one end of the oil extraction hose (10), and the connecting pipe head (16) is fixedly mounted on the top end of the sliding oil pipe (11).

Images