Horizontal screw centrifuge for deliming high-temperature high-ash oil residue

Abstract

The utility model relates to the technical field of horizontal screw centrifuges, in particular to a horizontal screw centrifuge for deashing high-temperature high-ash oil residues, which comprises a casing, a rotary drum is mounted in the casing, a spiral pusher is mounted in the rotary drum, the rotary drum and the spiral pusher are coaxially arranged, one end of the rotary drum is a conical end, and the other end of the rotary drum is a conical end. A slag discharging opening is formed in the end, close to the conical end, of the machine shell, a clear liquid discharging opening is formed in the other end of the machine shell, a liquid level baffle is arranged on the right side of the slag discharging opening, a feeding channel is formed in the spiral pusher and extends out of a material storage cavity in the direction of the conical section, and a backflow cavity is formed between the feeding channel and the inner wall of the rotary drum. The high-temperature coal chemical oil residue deashing device can treat 120 DEG C high-temperature coal chemical oil residue through the large-diameter and large-length-diameter-ratio rotary drum, can perform deashing treatment on oil residue with high solid content and high viscosity, and has the characteristics of high automation degree, low noise, long service life and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of horizontal screw centrifuges, in particular to a horizontal screw centrifuge for deashing high-temperature and high-ash oil slag. Background Art

[0002] A horizontal screw discharge sedimentation centrifuge is a centrifuge used to process the separation of heterogeneous solid-liquid phases, and can separate suspensions of liquid-solid and liquid-liquid-solid. In the coal chemical production industry, the requirements for the use of horizontal screw centrifuges are relatively strict, such as high-temperature materials, no material and flue gas leakage at the site, and the centrifuge should operate in a fully enclosed manner. At present, the maximum temperature that the centrifuges in the domestic market can withstand is within 90°C, which cannot meet the production requirements of the coal chemical industry. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a horizontal screw centrifuge for deashing high-temperature and high-ash oil slag to solve the above problems.

[0004] The technical solution for the utility model to solve the above technical problems is: a horizontal screw centrifuge for deashing high-temperature and high-ash oil slag, including a machine shell, a drum is installed inside the machine shell, a screw pusher is installed inside the drum, the drum and the screw pusher are coaxially arranged, one end of the drum is set as a conical end, a slag discharge port is arranged at one end of the machine shell close to the conical end, a clear liquid discharge port is arranged at the other end of the machine shell, a liquid level baffle is arranged on the right side of the slag discharge port, and air inlets are connected to both ends of the machine shell.

[0005] As a preferred technical solution of the utility model, the inner diameter of the drum ≥ 760 mm.

[0006] As a preferred technical solution of the utility model, the length-diameter ratio of the drum is 4.5.

[0007] As a preferred technical solution of the utility model, the spiral blades on the screw pusher are inclined.

[0008] As a preferred technical solution of the utility model, the angle of the conical end is 7-9°.

[0009] As a preferred technical solution of the utility model, a feed channel is arranged inside the screw pusher, a storage cavity extends out from the feed channel towards the conical section, and a reflux cavity is formed between the feed channel and the inner wall of the drum.

[0010] As a preferred technical solution of the utility model, wear-resistant layers are welded on the slag discharge port, the feed port of the screw pusher and the spiral blades of the screw pusher.

[0011] As a preferred technical solution of the utility model, the material of the wear-resistant layer is alloy or tungsten carbide.

[0012] As a preferred technical solution of the present utility model, air inlets are connected to both ends of the casing, and nitrogen gas is introduced into the air inlets.

[0013] As a preferred technical solution of the present utility model, the casing has a double-layer structure.

[0014] After the present utility model adopts such a structure, the high-temperature coal chemical oil residue at 120 °C can be processed by a rotating drum with a large diameter and a large length-diameter ratio, and the deashing treatment of oil residues with high solid content and high viscosity can be carried out. It has the characteristics of high automation degree, low noise, and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a horizontal scroll centrifuge for deashing high-temperature and high-ash oil residues of the present utility model.

[0016] In the figure: 1 is the casing, 2 is the rotating drum, 3 is the screw pusher, 4 is the liquid level baffle, 5 is the screw blade, 6 is the storage chamber, and 7 is the reflux chamber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0018] As Figure 1 shown, a horizontal scroll centrifuge for deashing high-temperature and high-ash oil residues of the present utility model includes a casing 1. A rotating drum 2 is installed inside the casing 1. A screw pusher 3 is installed inside the rotating drum 2. The rotating drum 2 and the screw pusher 3 are coaxially arranged. One end of the rotating drum 2 is set as a tapered end. A slag discharge port is arranged at one end of the casing 1 close to the tapered end. A clear liquid discharge port is arranged at the other end of the casing 1. A liquid level baffle 4 is arranged on the right side of the slag discharge port. Air inlets are connected to both ends of the casing 1. The liquid level baffle 4 can make the centrifuge in a super-deep liquid pool state to increase the slag pressing force on the filter cake, and only convey the lower sediment while intercepting the sludge with a high moisture content in the upper part outside the pressing cone section to achieve pressing dehydration and make the discharged sludge drier.

[0019] Furthermore, for the present utility model, the inner diameter of the rotating drum 2 ≥ 760 mm. The processing capacity of a rotating drum with a large diameter is several times that of an ordinary centrifuge, which can improve the daily processing capacity, can efficiently process high-temperature coal chemical oil residues at 120 °C, is convenient and efficient to use, and has good practicability.

[0020] Furthermore, for the present utility model, the length-diameter ratio of the rotating drum 2 is 4.5. The high-speed and small differential speed system, and the large length-diameter ratio increase the clarification and dehydration residence time of the material in the machine. The high speed has a large centrifugal force field, and the small differential speed reduces the agitation of the screw on the material and increases the dehydration residence time, thereby improving the separation effect of material dehydration and clarification, can efficiently process high-temperature coal chemical oil residues at 120 °C, is convenient and efficient to use, and has good practicability.

[0021] Furthermore, for the present utility model, the spiral blades 5 on the spiral pusher 3 are inclined. The inclined spiral blades 5 can further increase the slag pressing force on the mud cake, realize squeezing dehydration, and make the discharged mud drier.

[0022] Furthermore, for the present utility model, the angle of the cone end is 7 - 9°, preferably 8°. With the angle of the cone end being 8° and the cone section being lengthened by about 50 cm, the drying area is lengthened, and at the same time, the solid slag pressing time is also extended, so that the dryness of the material after separation is 3% - 8% higher than that of other models.

[0023] Furthermore, for the present utility model, a feed channel is provided inside the spiral pusher 3. The feed channel extends towards the cone section to form a storage cavity 6, and a reflux cavity 7 is formed between the feed channel and the inner wall of the drum 1. The double - cavity structure composed of the storage cavity 6 and the reflux cavity 7 avoids the material from congesting inside the spiral and generating a reflux phenomenon, and can also make the material flow - divide quickly and evenly, with basically no congestion phenomenon occurring.

[0024] Furthermore, for the present utility model, the main bearing of the spiral pusher is connected to a water - cooling system. The main bearing adopting the water - cooling system can effectively extend the service life of the bearing, adjust the clearance between the screw and the drum, and reduce the influence of the expansion of the material due to high temperature on the operation of the equipment.

[0025] Furthermore, for the present utility model, wear - resistant layers are welded on the discharge port, the feed port of the spiral pusher, and the spiral blades 5 of the spiral pusher 3. Preferably, the material of the wear - resistant layer is alloy or tungsten carbide. It improves wear resistance, is not easy to fall off, makes the metallographic structure domain of its base material and welding material more dense, makes the wear - resistant and corrosion - resistant performance of the equipment more excellent, and extends its service life.

[0026] Furthermore, for the present utility model, the casing 1 is of a double - layer structure. The casing 1 adopts a double - layer plus sound - insulation layer design, and the casing 1 and the bearing seat adopt a labyrinth seal structure, which can make the machine run smoothly and significantly reduce the noise; at the same time, it can also avoid the temperature loss of the 120°C high - temperature coal chemical oil slag, with good practicability.

[0027] Furthermore, for the present utility model, air inlets are connected to both ends of the casing 1, and nitrogen is introduced through the air inlets. The horizontal screw centrifuge is used in high - risk environments such as chemical industry. By installing nitrogen - filling interfaces at both ends of the centrifuge casing 1, nitrogen quickly forms a sealed gas ring after entering the labyrinth seal structure, forming an internal and external pressure difference, so that the material cannot enter the labyrinth seal area, achieving an efficient sealing effect.

[0028] The description and application of the present utility model here are illustrative and are not intended to limit the scope of the present utility model to the above embodiments. Modifications and changes to the disclosed embodiments here are possible, and various actual substitutions and equivalent components of the embodiments are known to those of ordinary skill in the art. Those skilled in the art should clearly understand that the present utility model can be implemented in other forms, structures, arrangements, proportions, and with other elements, materials, and components without departing from the spirit or essential characteristics of the present utility model. Other modifications and changes can be made to the disclosed embodiments here without departing from the spirit or essential characteristics of the present utility model.

Claims

1. A horizontal screw centrifuge for deashing high-temperature and high-ash oil residue, comprising a casing (1), characterized in that: A drum (2) is installed in the casing (1), a screw pusher (3) is installed in the drum (2), the drum (2) and the screw pusher (3) are coaxially arranged, one end of the drum (2) is arranged as a cone end, a slag discharge port is arranged at the end of the casing (1) close to the cone end, a clear liquid discharge port is arranged at the other end of the casing (1), a liquid level baffle (4) is arranged on the right side of the slag discharge port, both ends of the casing (1) are connected to air inlets, the inner diameter of the drum (2) is ≥760 mm, the aspect ratio of the drum (2) is 4.5, a feed channel is arranged in the screw pusher (3), the feed channel extends to form a storage chamber (6) in the direction of the cone section, and a reflux chamber (7) is formed between the feed channel and the inner wall of the drum (2).

2. The horizontal screw centrifuge for deashing high-temperature and high-ash oil residue according to claim 1, characterized in that: The spiral blades (5) on the spiral pusher (3) are arranged at an angle.

3. The horizontal screw centrifuge for deashing high-temperature and high-ash oil residue according to claim 1, characterized in that: The angle of the cone end is 7-9°.

4. The horizontal screw centrifuge for deashing high-temperature and high-ash oil residue according to claim 1, characterized in that: A wear-resistant layer is welded on the slag discharge port, the feed port of the screw pusher and the spiral blade (5) of the screw pusher (3).

5. The horizontal screw centrifuge for deashing high-temperature and high-ash oil residue according to claim 4, characterized in that: The material of the wear-resistant layer is alloy or tungsten carbide.

6. The horizontal screw centrifuge for deashing high-temperature and high-ash oil residue according to claim 1, characterized in that: Nitrogen is introduced into the gas inlet.

7. The horizontal screw centrifuge for deashing high-temperature and high-ash oil residue according to claim 1, characterized in that: The casing (1) is a double-layer structure.

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