Sludge mineral oil extraction device

Abstract

A sludge mineral oil extraction device comprises an extraction pipe, an extraction bottle and a fluid pump, the extraction pipe is arranged on the upper portion of the extraction bottle and comprises a pipe body, a sample cavity is formed in the pipe body, the extraction bottle comprises a bottle body, a liquid storage cavity is formed in the bottle body, an inlet of the fluid pump is communicated with the lower portion of the liquid storage cavity, and an outlet of the fluid pump is communicated with the lower portion of the liquid storage cavity. An outlet of the fluid pump is communicated with the upper portion of the sample cavity, the lower portion of the sample cavity is communicated with the upper portion of the liquid storage cavity, the fluid pump lifting and elution are used for replacing an extraction agent circulation mode of evaporation, condensation, extraction and siphoning, the extraction period is greatly shortened, the extraction agent circulation process is the normal temperature all the time, and condensate water is not needed in the extraction process.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory extraction, in particular to a sludge mineral oil extraction device. Background Art

[0002] For the detection of mineral oil content in sludge from urban sewage treatment plants, relevant departments have issued the detection method "Test Method for Sludge from Urban Sewage Treatment Plants" (CJ / T221-2005), which stipulates the use of Soxhlet extractor.

[0003] The Soxhlet extractor is usually composed of three parts from bottom to top: an extraction bottle, an extractor, and a condenser. The extractor is equipped with a steam connecting pipe and an extractant siphon. During extraction, the sludge sample is wrapped in a filter paper bag and placed in the extractor. The extractant is placed in the extraction bottle, the extraction bottle is heated, and the extractant vapor enters the condenser through the steam connecting pipe. After condensing into liquid, it drips into the extractor to dissolve the mineral oil in the sample. When the liquid level in the extractor reaches a certain height, the extractant containing mineral oil can flow back to the extraction bottle through the siphon. In this cycle, the mineral oil in the extraction bottle is gradually enriched. After a period of time, the mineral oil can be extracted more thoroughly, and the total amount of mineral oil in the extractant is determined by an infrared spectrophotometer.

[0004] The extraction cycle of the Soxhlet extractor is relatively long, generally about four hours, and a large amount of condensed water is used in the extraction process. As environmental protection has received more and more attention, the frequency of sludge testing in sewage treatment plants has increased significantly, and the use of large amounts of condensed water has become an issue that cannot be ignored. Summary of the invention

[0005] In view of this, in view of the above-mentioned shortcomings, it is necessary to propose a sludge mineral oil extraction device.

[0006] A sludge mineral oil extraction device comprises an extraction tube, an extraction bottle, and a fluid pump. The extraction tube is arranged at the upper part of the extraction bottle. The extraction tube comprises a tube body. A sample cavity is arranged in the tube body. The extraction bottle comprises a bottle body. A liquid storage cavity is arranged in the bottle body. The inlet of the fluid pump is connected to the lower part of the liquid storage cavity. The outlet of the fluid pump is connected to the upper part of the sample cavity. The lower part of the sample cavity is connected to the upper part of the liquid storage cavity.

[0007] Preferably, the fluid pump is a peristaltic pump.

[0008] Preferably, the extraction bottle comprises a cooling tube, the upper end of the cooling tube is communicated with the sample cavity, the lower end of the cooling tube is communicated with the liquid storage cavity, and a pressure relief port is provided on the side wall of the cooling tube.

[0009] Preferably, the extraction tube includes a drainage tube, a drainage port is provided at the lower end of the tube body, the upper end of the drainage tube is connected to the drainage port, and the lower end of the drainage tube passes through the cooling tube and extends to the lower part near the liquid storage chamber.

[0010] Preferably, the extraction tube includes a nozzle, which is a hollow sphere and densely covered with injection holes. The outlet of the fluid pump is connected to the inner cavity of the nozzle through a hose, and the inlet of the fluid pump is connected to the lower part of the liquid storage cavity through a hose.

[0011] Preferably, the sludge mineral oil extraction device comprises a nitrogen tank, and an air vent is provided at the upper end of the tube body, and the air vent is connected to the nitrogen tank.

[0012] Preferably, the extraction tube comprises an air guide tube, the upper end of the air guide tube is communicated with the vent, and the lower end of the air guide tube extends to the upper part of the sample chamber.

[0013] Preferably, the sludge mineral oil extraction device includes a fixed frame, the fixed frame includes a clamp and a frame body, the clamp is arranged on the frame body, the clamp includes a first clamping handle, a second clamping handle, a torsion spring, and a locking piece, the first end of the first clamping handle is connected to the frame body, the first end of the first clamping handle is rotatably connected to the first end of the second clamping handle, the first end of the torsion spring is connected to the first clamping handle, the second end of the torsion spring is connected to the second clamping handle, the locking piece includes a screw and a nut, the first end of the screw is hinged to the second end of the first clamping handle, a through hole is provided at the second end of the second clamping handle, the second end of the screw can pass through the through hole, and the second end of the screw is screwed into the nut.

[0014] Preferably, the clamp includes two chucks, namely a first chuck and a second chuck. The first end of the first chuck is connected to the second end of the first clamping handle, and the second end of the first chuck is a free end. The first end of the second chuck is connected to the second end of the second clamping handle, and the second end of the second chuck is a free end. The first chuck is close to the second chuck to form a ring.

[0015] Preferably, the chuck comprises a clamping plate and a gasket, the clamping plate is arc-shaped, two ends of the gasket are respectively connected to two ends of the clamping plate, the gasket is made of elastic material, and the length of the gasket is smaller than the arc length of the clamping plate.

[0016] Beneficial effects: The extraction cycle is greatly shortened by using fluid pump lifting and elution instead of evaporation, condensation, leaching and siphoning. The extraction process of the extraction agent is always at room temperature, and condensed water is no longer required in the extraction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the sludge mineral oil extraction device.

[0018] Figure 2 It is a partial structural schematic diagram of the sludge mineral oil extraction device, in which the nitrogen tank and the fixing frame are not shown, and the extraction tube and the extraction bottle show the internal structure.

[0019] Figure 3 It is the front view of the chuck.

[0020] Figure 4 It is a top view of the chuck.

[0021] In the figure: extraction tube 10, tube body 11, drainage tube 12, nozzle 13, air guide tube 14, extraction bottle 20, bottle body 21, cooling tube 22, pressure relief port 23, fluid pump 30, sleeve 40, nitrogen tank 50, fixing frame 60, clamp 61, first clamping handle 611, second clamping handle 612, torsion spring 613, locking piece 614, screw 6141, nut 6142, chuck 615, splint 6151, gasket 6152, protrusion 616, frame 62, bottom plate 63, connecting rod 64, connecting piece 65. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] See also Figure 1 The embodiment of the utility model provides a sludge mineral oil extraction device, including an extraction tube 10, an extraction bottle 20, and a fluid pump 30. The extraction tube 10 is arranged at the upper part of the extraction bottle 20. The extraction tube 10 includes a tube body 11, and a sample cavity is arranged in the tube body 11. The extraction bottle 20 includes a bottle body 21, and a liquid storage cavity is arranged in the bottle body 21. The inlet of the fluid pump 30 is connected to the lower part of the liquid storage cavity, and the outlet of the fluid pump 30 is connected to the upper part of the sample cavity, and the lower part of the sample cavity is connected to the upper part of the liquid storage cavity. The fluid pump 30 transports the extractant in the liquid storage cavity to the sample cavity, and after soaking the sludge sample in the sample cavity, it flows into the liquid storage cavity. The operation is repeated, and the mineral oil in the sludge sample is extracted.

[0024] Exemplarily, the sample chamber contains a sludge sample, and the liquid storage chamber contains an extractant.

[0025] Exemplarily, the liquid storage cavity is filled with tetrachloroethylene extractant, which is less toxic and more thermally stable than carbon tetrachloride.

[0026] Exemplarily, the sludge sample containing mineral oil is wrapped with lipophilic filter paper and placed in a sleeve 40, which is a glass fiber filter cartridge. The sleeve 40 is placed in the sample cavity.

[0027] Exemplarily, the extraction bottle 20 and the extraction tube 10 are both made of glass.

[0028] Beneficial effects: The fluid pump 30 is used to lift and elute the extractant circulation method instead of evaporation, condensation, leaching and siphoning, which greatly shortens the extraction cycle, the extractant circulation process is always at room temperature, and condensed water is no longer required in the extraction process.

[0029] See also Figure 1 , further, the fluid pump 30 is a peristaltic pump.

[0030] See also Figure 1 Further, the extraction bottle 20 includes a cooling tube 22 , the upper end of the cooling tube 22 is connected to the sample cavity, the lower end of the cooling tube 22 is connected to the liquid storage cavity, and a pressure relief port 23 is provided on the side wall of the cooling tube 22 .

[0031] See also Figure 2 Further, the extraction tube 10 includes a drainage tube 12, a drainage port is provided at the lower end of the tube body 11, the upper end of the drainage tube 12 is connected to the drainage port, and the lower end of the drainage tube 12 passes through the cooling tube 22 and extends to the lower part near the liquid storage cavity.

[0032] Exemplarily, the outer diameter of the drainage tube 12 is smaller than the inner diameter of the cooling tube 22, and the drainage tube 12 is coaxial with the cooling tube 22. The diameter of the sample cavity is larger than the diameter of the drainage port, the diameter of the sleeve 40 is smaller than the diameter of the sample cavity, and the diameter of the sleeve 40 is larger than the diameter of the drainage port.

[0033] See also Figure 2 Further, the extraction tube 10 includes a nozzle 13, which is a hollow sphere and densely covered with injection holes. The outlet of the fluid pump 30 is connected to the inner cavity of the nozzle 13 through a hose, and the inlet of the fluid pump 30 is connected to the lower part of the liquid storage cavity through a hose. The extractant lifted by the peristaltic pump is prevented from being in a spray shape.

[0034] See also Figure 2 Further, the sludge mineral oil extraction device includes a nitrogen tank 50, and a vent is provided at the upper end of the pipe body 11, and the vent is connected to the nitrogen tank 50. Nitrogen is used to purge the resident extractant.

[0035] See also Figure 2 Further, the extraction tube 10 includes an air guide tube 14, the upper end of the air guide tube 14 is connected to the vent, and the lower end of the air guide tube 14 extends to the upper part of the sample cavity.

[0036] Exemplarily, a valve is installed on the pipeline between the vent and the nitrogen tank 50 , the outer diameter of the air guide tube 14 is smaller than the inner diameter of the tube body 11 , and the air guide tube 14 is coaxial with the tube body 11 .

[0037] See also Figure 1 , Figure 3 , Figure 4Further, the sludge mineral oil extraction device includes a fixed frame 60, the fixed frame 60 includes a clamp 61 and a frame body 62, the clamp 61 is arranged on the frame body 62, the clamp 61 includes a first clamping handle 611, a second clamping handle 612, a torsion spring 613, and a locking piece 614, the first end of the first clamping handle 611 is connected to the frame body 62, the first end of the first clamping handle 611 is rotatably connected to the first end of the second clamping handle 612, the first end of the torsion spring 613 is connected to the first clamping handle 611, the second end of the torsion spring 613 is connected to the second clamping handle 612, the locking piece 614 includes a screw rod 6141 and a nut 6142, the first end of the screw rod 6141 is hinged to the second end of the first clamping handle 611, and a through hole is provided at the second end of the second clamping handle 612, the second end of the screw rod 6141 can pass through the through hole, and the second end of the screw rod 6141 is screwed into the nut 6142. The addition of the torsion spring 613 can reduce the relative free movement of the first clamping handle 611 and the second clamping handle 612 to break the extraction tube 10. The locking member 614 can prevent the torsion spring 613 from losing some elasticity after long-term use, resulting in insufficient clamping force.

[0038] Exemplarily, there are two clamps 61, which are respectively used to clamp the extraction tube 10 and the extraction bottle 20. The fixing frame 60 includes a bottom plate 63 and a connecting rod 64. The extraction bottle 20 can be placed on the bottom plate 63, and the frame 62 is arranged on the bottom plate 63. One end of the connecting rod 64 is relatively fixed to the frame 62 through a connecting piece 65, and the other end of the connecting rod 64 is connected to the clamp 61. The connecting piece 65 is a conventional structure and will not be described in detail. After the connecting piece 65 is loosened, the connecting rod 64 can be adjusted in the horizontal direction and vertical direction relative to the frame 62. After the connecting piece 65 is tightened, the connecting rod 64 can be fixed in the horizontal direction and vertical direction relative to the frame 62.

[0039] Exemplarily, in an alternative solution, the through hole can be a screw hole, and the screw rod 6141 is threadedly matched with the through hole. In this case, the same effect can be achieved by removing the nut 6142 and the torsion spring 613.

[0040] See also Figure 1 , Figure 3 , Figure 4 Further, the clamp 61 includes two clamps 615, namely a first clamp 615 and a second clamp 615. The first end of the first clamp 615 is connected to the second end of the first clamping handle 611, and the second end of the first clamp 615 is a free end. The first end of the second clamp 615 is connected to the second end of the second clamping handle 612, and the second end of the second clamp 615 is a free end. The first clamp 615 is close to the second clamp 615 to form a ring.

[0041] See also Figure 1 , Figure 3 , Figure 4Further, the clamp 615 includes a clamping plate 6151 and a gasket 6152. The clamping plate 6151 is arc-shaped. The two ends of the gasket 6152 are respectively connected to the two ends of the clamping plate 6151. The gasket 6152 is made of elastic material. The length of the gasket 6152 is less than the arc length of the clamping plate 6151. When the extraction tube 10 is clamped between the two clamping plates 6151, the extraction tube 10 and the clamping plates 6151 are mostly point-contacted, and the clamping is unstable. When an elastic gasket 6152 is provided, after the gasket 6152 is deformed, it forms a wrap angle with the extraction tube 10 to enhance stability.

[0042] Exemplarily, the length of the gasket 6152 is greater than the chord length of the clamping plate 6151, preferably the length of the gasket 6152 is equal to the chord length of the clamping plate 6151, and preferably the protrusions 616 are evenly distributed on the gasket 6152. The protrusions 616 are air bags, and two adjacent protrusions 616 are connected. When the extraction tube 10 is clamped between the two gaskets 6152, the gas in the protrusion 616 pressed by the extraction tube 10 will be pressed into the protrusion 616 that is not in contact with the extraction tube 10, and the protrusion 616 that is not in contact with the extraction tube 10 will become larger, further holding the extraction tube 10, and enhancing stability.

[0043] The modules or units in the device of the embodiment of the utility model can be combined, divided and deleted according to actual needs.

[0044] The above disclosure is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. A sludge mineral oil extraction device, characterized in that: It includes an extraction tube, an extraction bottle, and a fluid pump. The extraction tube is arranged at the upper part of the extraction bottle. The extraction tube includes a tube body. A sample cavity is arranged in the tube body. The extraction bottle includes a bottle body. A liquid storage cavity is arranged in the bottle body. The inlet of the fluid pump is connected with the lower part of the liquid storage cavity. The outlet of the fluid pump is connected with the upper part of the sample cavity. The lower part of the sample cavity is connected with the upper part of the liquid storage cavity.

2. The sludge mineral oil extraction device according to claim 1, characterized in that: The fluid pump is a peristaltic pump.

3. The sludge mineral oil extraction device according to claim 1, characterized in that: The extraction bottle comprises a cooling tube, the upper end of the cooling tube is communicated with the sample cavity, the lower end of the cooling tube is communicated with the liquid storage cavity, and a pressure relief port is arranged on the side wall of the cooling tube.

4. The sludge mineral oil extraction device as claimed in claim 3, characterized in that: The extraction tube comprises a drainage tube, the lower end of the tube body is provided with a drainage port, the upper end of the drainage tube is connected to the drainage port, and the lower end of the drainage tube passes through the cooling tube and extends to the lower part close to the liquid storage cavity.

5. The sludge mineral oil extraction device according to claim 1, characterized in that: The extraction pipe comprises a nozzle, which is a hollow spherical nozzle and is densely covered with injection holes. The outlet of the fluid pump is connected to the inner cavity of the nozzle through a hose, and the inlet of the fluid pump is connected to the lower part of the liquid storage cavity through a hose.

6. The sludge mineral oil extraction device according to claim 1, characterized in that: The sludge mineral oil extraction device comprises a nitrogen tank. The upper end of the pipe body is provided with a vent, and the vent is communicated with the nitrogen tank.

7. The sludge mineral oil extraction device according to claim 6, characterized in that: The extraction tube comprises an air guide tube, the upper end of the air guide tube is communicated with the vent, and the lower end of the air guide tube extends to the upper part of the sample cavity.

8. The sludge mineral oil extraction device as claimed in claim 1, characterized in that: The sludge mineral oil extraction device includes a fixed frame, the fixed frame includes a clamp and a frame body, the clamp is arranged on the frame body, the clamp includes a first clamping handle, a second clamping handle, a torsion spring, and a locking piece, the first end of the first clamping handle is connected to the frame body, the first end of the first clamping handle is rotatably connected to the first end of the second clamping handle, the first end of the torsion spring is connected to the first clamping handle, the second end of the torsion spring is connected to the second clamping handle, the locking piece includes a screw and a nut, the first end of the screw is hinged to the second end of the first clamping handle, a through hole is provided at the second end of the second clamping handle, the second end of the screw can pass through the through hole, and the second end of the screw is screwed into the nut.

9. The sludge mineral oil extraction device according to claim 8, characterized in that: The clamp includes two chucks, namely a first chuck and a second chuck. The first end of the first chuck is connected to the second end of the first clamping handle, and the second end of the first chuck is a free end. The first end of the second chuck is connected to the second end of the second clamping handle, and the second end of the second chuck is a free end. The first chuck is close to the second chuck to form a ring.

10. The sludge mineral oil extraction device according to claim 9, characterized in that: The clamp includes a clamping plate and a gasket. The clamping plate is arc-shaped. Two ends of the gasket are respectively connected to two ends of the clamping plate. The gasket is made of elastic material. The length of the gasket is smaller than the arc length of the clamping plate.

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