CN209961033U

CN209961033U - Waste oil recycling and heating system with anti-blocking function

Info

Publication number: CN209961033U
Application number: CN201920638013.XU
Authority: CN
Inventors: 陈一鹏
Original assignee: Shanxi Xinhai Chemical Co Ltd
Current assignee: Shanxi Xinhai environmental treatment Co., Ltd
Priority date: 2019-05-06
Filing date: 2019-05-06
Publication date: 2020-01-17
Anticipated expiration: 2029-05-06

Abstract

The utility model relates to a waste oil recovery heating system with anti-blocking function, which can keep the material at a higher flow velocity in the heating process, shorten the retention time of waste oil in a heat exchanger, prevent the waste oil from coking, ensure the normal operation of the device and improve the practicability; the tower comprises a tower body, a heat exchanger, the bottom of the tower pump, the lower liquid pipe, two sets of first connecting pipes, two sets of second connecting pipes, two sets of first ooff valve and two sets of second ooff valve, the heat exchanger is provided with two sets ofly, two sets of heat exchanger's structure is the same, the heat exchanger includes the casing, multiunit heat transfer standpipe, go up tube sheet and low tube plate, the top and the bottom of casing are provided with upper cover and low head respectively, go up tube sheet and low tube plate with the casing inside from the top separate into the derivation section, heat transfer section and leading-in section, it perforates on being provided with the multiunit on the upper tube sheet, be provided with perforation under the multiunit on the low tube plate, the first region and the second region.

Description

Waste oil recycling and heating system with anti-blocking function

Technical Field

The utility model relates to a waste oil recovery technical field especially relates to a waste oil recovery heating system with prevent stifled function.

Background

As is well known, a waste oil recovery heating system is a device for heating waste oil, which is widely used in the field of waste oil recovery and regeneration; the existing waste oil recovery heating system comprises a tower body, a heat exchanger, a tower bottom pump and a reflux section, wherein a liquid drainage pipe is arranged at the bottom end of the tower body, the input end of the tower bottom pump is communicated with the output end of the liquid drainage pipe, the output end of the tower bottom pump is communicated with the input end of the heat exchanger, one end of the reflux section is communicated with the output end of the heat exchanger, and the other end of the reflux section is communicated with the tower body; when the existing waste oil recovery heating system is used, waste oil in a tower body is pumped into a heat exchanger through a tower bottom pump, the waste oil is heated through the heat exchanger, and then the waste oil flows back into the tower body through a reflux section; the conventional waste oil recovery heating system is found in use that the conventional heat exchanger is easy to block a heat exchange tube of the heat exchanger due to low material flow rate because the waste lubricating oil is very dirty and easy to coke and decompose at high temperature, so that the shutdown of the device is caused, and the normal production is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a make the material keep higher velocity of flow in the heating process, shorten the dwell time of waste oil in the heat exchanger, prevent the condition of waste oil coking, guarantee device normal operating, the waste oil recovery heating system who has anti-blocking function that improves the practicality.

The utility model discloses a waste oil recovery heating system with anti-blocking function, including heat exchanger and tower bottom pump, the tower body of heat exchanger and atmospheric tower is connected, and the bottom of tower body is provided with the downcomer, and the input of tower bottom pump communicates with the bottom of downcomer; the heat exchanger comprises a shell, a plurality of groups of heat exchange vertical pipes, an upper tube plate and a lower tube plate, wherein the top end and the bottom end of the shell are respectively provided with an upper end enclosure and a lower end enclosure, the upper tube plate and the lower tube plate are transversely arranged in the shell and are respectively positioned in the upper half area and the lower half area of the shell, the upper tube plate and the lower tube plate divide the interior of the shell into a leading-out section, a heat exchange section and a leading-in section from top to bottom, the upper tube plate is provided with a plurality of groups of upper through holes, the leading-out section and the heat exchange section are communicated through the plurality of groups of upper through holes, the lower tube plate is provided with a plurality of groups of lower through holes, the leading-in section and the heat exchange section are respectively positioned right above the plurality of groups of lower through holes, the top ends of the plurality of groups of heat exchange vertical pipes respectively penetrate through the upper through holes to the leading-out section, the bottom of multiunit heat transfer standpipe passes under the multiunit respectively in the heat transfer section and perforates to the induction section in, and the first region and the second region of casing left end are provided with fused salt export and fused salt import respectively, fused salt export and fused salt import all communicate with each other with the heat transfer section, the input of two sets of first communicating pipes all communicates with each other with the output of tower bottom pump, and the output of two sets of first communicating pipes stretches into to two sets of induction sections in from the bottom of two sets of low heads respectively to all be provided with first ooff valve on two sets of first communicating pipes, the left end and the right-hand member of tower body all are provided with and return the tower mouth, the one end of two sets of second communicating pipes stretches into to two sets of derivation sections in from the left end top of two sets of casings respectively in, the other end of two sets of second communicating pipes respectively with two sets of return the tower mouth intercommunication to all be provided with the second.

The utility model discloses a waste oil recovery heating system with prevent stifled function, be provided with left baffling board of multiunit and the right baffling board of multiunit in the heat transfer section, the left end of the left baffling board of multiunit all with the left side wall connection of heat transfer section, all leave the space between the right-hand member of the left baffling board of multiunit and the right side wall of heat transfer section, the right-hand member of the right baffling board of multiunit all with the right side wall connection of heat transfer section, all leave the space between the left end of the right baffling board of multiunit and the left side wall of heat transfer section to the left baffling board of multiunit and the right baffling board of multiunit set up in turn, all are provided with on left.

The utility model discloses a waste oil recovery heating system with prevent stifled function, the top of upper cover is provided with and derives the communicating blow-down pipe of section.

The utility model discloses a waste oil recovery heating system with prevent stifled function, the heat exchanger sets up towards the lopsidedness of fused salt import, and inclination is 5.

The utility model discloses a waste oil recovery heating system with prevent stifled function, the right-hand member of casing is provided with evacuation mouth and clean mouth of emptying, evacuation mouth and clean mouth of emptying all communicate with each other with the heat transfer section to evacuation mouth place horizontal plane is located the top at fused salt export place horizontal plane, and clean mouth of emptying is flat with lower tube sheet, and is provided with the valve in clean mouth department.

The utility model discloses a waste oil recovery heating system with prevent stifled function still includes that the bottom of the tower pump is 4-6 ms to the conveying speed of material, the external diameter of heat transfer standpipe is 38 mm.

The utility model relates to a waste oil recovery heating system with anti-blocking function, which also comprises an upper connecting shaft, an upper mounting plate, a lower connecting shaft and a lower mounting plate, wherein the bottom end of the upper mounting plate is provided with an upper mounting groove, an upper ball bearing is fixedly arranged in the upper mounting groove, the bottom end of the upper connecting shaft is connected with the middle part of the top end of the upper tube plate, the top end of the upper connecting shaft is inserted into the upper ball bearing from the bottom end of the upper mounting plate, a plurality of groups of upper stirring fan blades are uniformly arranged on the outer side of the upper mounting plate at equal intervals, a lower mounting groove is arranged at the top end of the lower mounting plate, and fixed mounting has ball bearing down in the mounting groove down, the top of lower connecting axle is connected with the bottom middle part of lower tube sheet, and inside the bottom of lower connecting axle inserted ball bearing down from the top of lower mounting panel, the stirring flabellum under the multiunit was evenly installed to the outside of lower mounting panel equidistant.

The utility model discloses a waste oil recovery heating system with prevent stifled function, go up the connecting axle, go up the mounting panel, go up and mix the flabellum, down the connecting axle, down the mounting panel and mix the flabellum down and be stainless steel.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a tower bottom pump is gone into the material to the induction section in through first communicating pipe pump, the material gets into the contact tube through multiunit heat transfer standpipe in the induction section, the material is heated by the fused salt in the heat transfer section in the in-process of carrying in the heat transfer standpipe, the fused salt gets into the heat transfer section through the fused salt import of bottom and exports from the fused salt export at top, guarantee that the fused salt has higher temperature, the material is heated in the heat transfer standpipe, make the material keep higher velocity of flow in the heating process, shorten the dwell time of waste oil in the heat exchanger, prevent the coking condition of waste oil, guarantee the normal operating of device, the material through the heating flows back to the tower body through the second communicating pipe, two sets of heat exchangers are one-for-use one and-for-one-use, select the heat exchanger through first ooff valve and second ooff valve, when one set of them heat exchanger takes place, the practicability is improved.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is a schematic view of a part of an enlarged structure at a in fig. 1 according to the present invention;

fig. 3 is a schematic view of the present invention at a portion B of fig. 1;

fig. 4 is a schematic perspective view of the upper tube plate of the present invention;

fig. 5 is a schematic perspective view of the lower tube plate of the present invention;

in the drawings, the reference numbers: 1. a tower body; 2. a heat exchanger; 3. a tower bottom pump; 4. a liquid discharging pipe; 5. a first communication pipe; 6. a second communicating pipe; 7. a housing; 8. a heat exchange vertical pipe; 9. an upper tube sheet; 10. a lower tube plate; 11. a lead-out segment; 12. a heat exchange section; 13. a lead-in section; 14. perforating; 15. lower punching; 16. a molten salt outlet; 17. a molten salt inlet; 18. a first on-off valve; 19. returning to the tower mouth; 20. a second on-off valve; 21. a left baffle plate; 22. a right baffle plate; 23. an emptying pipe; 24. emptying the air; 25. a discharge port; 26. an upper connecting shaft; 27. an upper mounting plate; 28. a lower connecting shaft; 29. a lower mounting plate; 30. an upper ball bearing; 31. upper stirring fan blades; 32. a lower ball bearing; 33. lower stirring fan blades; 34. an upper end enclosure; 35. and (5) sealing the head.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 5, the waste oil recycling heating system with anti-blocking function of the present invention comprises a heat exchanger 2 and a tower bottom pump 3, wherein the heat exchanger 2 is connected with a tower body 1 of an atmospheric tower, a liquid discharging pipe 4 is arranged at the bottom end of the tower body 1, and the input end of the tower bottom pump 3 is communicated with the bottom end of the liquid discharging pipe 4; the heat exchanger comprises a shell 7, a plurality of groups of heat exchange vertical pipes 8, an upper pipe plate 9 and a lower pipe plate 10, wherein the top end and the bottom end of the shell 7 are respectively provided with an upper end enclosure 34 and a lower end enclosure 35, the upper pipe plate 9 and the lower pipe plate 10 are transversely arranged in the shell 7, the upper pipe plate 9 and the lower pipe plate 10 are respectively positioned in the upper half area and the lower half area of the shell 7, the upper pipe plate 9 and the lower pipe plate 10 divide the interior of the shell 7 into a guide-out section 11, a heat exchange section 12 and a guide-in section 13 from top to bottom, the upper pipe plate 9 is provided with a plurality of groups of upper through holes 14, the guide-out section 11 and the heat exchange section 12 are communicated through the plurality of groups of upper through holes 14, the lower pipe plate 10 is provided with a plurality of groups of lower through holes 15, the guide-in section 13 and the heat exchange section 12 are communicated through the plurality of groups of lower through holes 15, and the plurality of groups, the top ends of a plurality of groups of heat exchange vertical pipes 8 respectively penetrate through upper through holes 14 to a leading-out section 11 from a heat exchange section 12, the bottom ends of the plurality of groups of heat exchange vertical pipes 8 respectively penetrate through a plurality of groups of lower through holes 15 to a leading-in section 13 from the heat exchange section 12, the upper half area and the lower half area of the left end of a shell 7 are respectively provided with a molten salt outlet 16 and a molten salt inlet 17, the molten salt outlet 16 and the molten salt inlet 17 are both communicated with the heat exchange section 12, the input ends of two groups of first communication pipes 5 are both communicated with the output end of a tower bottom pump 3, the output ends of two groups of first communication pipes 5 respectively extend into the two groups of leading-in sections 13 from the bottom ends of two groups of lower end sockets, first switch valves 18 are respectively arranged on the two groups of first communication pipes 5, the left end and the right end of a tower body 1 are both provided with tower return ports 19, one ends of two groups of second communication pipes 6 respectively extend into the two groups of leading-out, the two groups of second communicating pipes 6 are provided with second switch valves 20; the material is pumped into the leading-in section through the first communicating pipe by the tower bottom pump, the material enters the leading-out pipe in the leading-in section through the plurality of groups of heat exchange vertical pipes, the material is heated by the fused salt in the heat exchange section in the process of being conveyed in the heat exchange vertical pipes, the fused salt enters the heat exchange section through the fused salt inlet at the bottom and is led out from the fused salt outlet at the top, the fused salt is ensured to have higher temperature, the material is heated in the heat exchange vertical pipes, the material keeps higher flow velocity in the heating process, the retention time of waste oil in the heat exchanger is shortened, and the condition of coking of the waste oil is, the normal operation of the device is ensured, the heated material flows back to the tower body through the second communicating pipe, one of the two groups of heat exchangers is used and the other is standby, the heat exchanger is selected through the first switch valve and the second switch valve, when one group of heat exchangers is blocked or shut down, the other group of heat exchangers can be started, so that the shutdown is avoided, and the practicability is improved.

The utility model discloses a waste oil recovery heating system with prevent stifled function, be provided with multiunit left baffling board 21 and multiunit right baffling board 22 in the heat transfer section 12, the left end of multiunit left baffling board 21 all is connected with the left side wall of heat transfer section 12, all leave the space between the right-hand member of multiunit left baffling board 21 and the right side wall of heat transfer section 12, the right-hand member of multiunit right baffling board 22 all is connected with the right side wall of heat transfer section 12, all leave the space between the left end of multiunit right baffling board 22 and the left side wall of heat transfer section 12, and multiunit left baffling board 21 and multiunit right baffling board 22 alternate setting, all be provided with the through-hole that supplies heat transfer standpipe 8 to perforate on multiunit; the fused salt gets into the heat transfer section through the fused salt import and heats the heat transfer standpipe, makes the fused salt buckle in the heat transfer section through the baffling board of multiunit left side and the baffling board of multiunit right side and rises to make fused salt and heat transfer standpipe fully contact, improve the heat transfer effect.

The utility model discloses a waste oil recovery heating system with anti-blocking function, the top end of the upper head is provided with a vent pipe 23 communicated with the leading-out section 11; the waste oil is in a high-temperature state in the heat exchanger and can be decomposed inevitably, and the generated non-condensable gas is discharged to a tail gas absorption system through an emptying pipe.

The utility model discloses a waste oil recovery heating system with prevent stifled function, heat exchanger 2 sets up towards one side slope of fused salt import 17, inclination is 5, the fused salt is as the heating heat source of heat exchanger, advance to go up under adopting, because the fused salt melting point is very high, solidify very easily and block up the heat exchanger, consider when parkking, the fused salt withdraws from the convenient operation of heat exchanger, the fused salt directly withdraws from the heat exchanger from the fused salt import, and the heat exchanger is not standing vertically, but there is 5 inclination to fused salt business outlet side, if be the vertically, the fused salt can not be complete withdraws from the heat exchanger shell side, adopt the inclination design, can discharge the fused salt completely, prevent the persistence of fused salt and block up the heat exchanger.

The utility model discloses a waste oil recovery heating system with anti-blocking function, the right-hand member of casing 7 is provided with evacuation mouth 24 and drain-off mouth 25, evacuation mouth 24 and drain-off mouth 25 all communicate with heat transfer section 12, and the horizontal plane that evacuation mouth 24 locates is located the upper side of the horizontal plane that the fused salt export locates, drain-off mouth 25 and lower tube sheet 10 are equal, and drain-off mouth 25 department is provided with the valve; the pressure in the heat exchange section can be released through the emptying port, and the molten salt in the heat exchange section can be emptied through the emptying port after the work is finished.

The utility model discloses a waste oil recovery heating system with anti-blocking function, further comprising a tower bottom pump 3 with a material conveying speed of 4-6m/s and a heat exchange vertical pipe 8 with an outer diameter of 38 mm; the material can be kept at a higher speed in the heat exchange vertical pipe, the retention time of the material in the heat exchange vertical pipe is shortened, and the condition of waste oil coking is prevented.

The utility model relates to a waste oil recovery heating system with anti-blocking function, which also comprises an upper connecting shaft 26, an upper mounting plate 27, a lower connecting shaft 28 and a lower mounting plate 29, wherein the bottom end of the upper mounting plate 27 is provided with an upper mounting groove, an upper ball bearing 30 is fixedly installed in the upper mounting groove, the bottom end of an upper connecting shaft 26 is connected with the middle part of the top end of the upper tube plate 9, the top end of the upper connecting shaft 26 is inserted into the upper ball bearing 30 from the bottom end of an upper mounting plate 27, a plurality of groups of upper stirring fan blades 31 are evenly arranged on the outer side of the upper mounting plate 27 at equal intervals, a lower mounting groove is arranged at the top end of a lower mounting plate 29, a lower ball bearing 32 is fixedly arranged in the lower mounting groove, the top end of the lower connecting shaft 28 is connected with the middle part of the bottom end of the lower tube plate 10, the bottom end of the lower connecting shaft 28 is inserted into the lower ball bearing 32 from the top end of the lower mounting plate 29, and a plurality of groups of lower stirring fan blades 33 are uniformly arranged on the outer side of the lower mounting plate 29 at equal intervals; waste oil stirs the flabellum and rotates under leading-in section drives when upwards flowing to stir the waste oil in the leading-in section, prevent the waste oil deposit, waste oil stirs the flabellum rotation on leading-out section drives when upwards flowing, thereby stir the waste oil in the section of leading out, the waste oil that improves the corner is detained at the section of leading out.

The utility model discloses a waste oil recovery heating system with prevent stifled function goes up connecting axle 26, goes up mounting panel 27, goes up and stirs flabellum 31, lower connecting axle 28, lower mounting panel 29 and stirs flabellum 33 down and be stainless steel.

The utility model discloses a waste oil recovery heating system with prevent stifled function, it is at work, before accomplishing above-mentioned action, at first remove it to the position that the user needed, pump the material into to the induction zone through first communicating pipe through the tower bottom pump, the material gets into the contact tube through multiunit heat transfer standpipe in the induction zone, the material is heated by the fused salt in the heat transfer section in the process of carrying in the heat transfer standpipe, the fused salt gets into the heat transfer section through the fused salt import of bottom and exports from the fused salt export at top, guarantee that the fused salt has higher temperature, the material is heated in the heat transfer standpipe, make the material keep higher velocity of flow in the heating process, shorten the dwell time of waste oil in the heat exchanger, prevent the condition of waste oil coking, guarantee the normal operating of device, the material through heating flows back to the tower body through second communicating pipe, two sets of heat exchangers are used one by one, select the heat exchanger through first ooff valve and second ooff valve, when one group of heat exchangers is blocked or shut down, the other group of heat exchangers can be started to avoid shutting down, the practicability is improved, the molten salt enters the heat exchange section through the molten salt inlet to heat the heat exchange vertical pipe, the molten salt is bent and ascended in the heat exchange section through the multiple groups of left baffle plates and the multiple groups of right baffle plates, so that the molten salt is fully contacted with the heat exchange vertical pipe, the heat exchange effect is improved, waste oil is in a high-temperature state in the heat exchangers and can be decomposed inevitably, the generated non-condensable gas is discharged to a tail gas absorption system through an emptying pipe, the molten salt is used as a heating heat source of the heat exchangers, the molten salt enters and goes out from the bottom, the molten salt is very high in melting point and is easy to solidify and block the heat exchangers, the molten salt exits the heat exchangers to facilitate operation when the heat exchangers are shut down, the molten salt directly exits the, if be the vertically, the fused salt can not be complete withdraws from the heat exchanger shell side, adopt the inclination design, can discharge the fused salt completely, prevent persisting and blockking up the heat exchanger of fused salt, the waste oil stirs the flabellum and rotates under leading-in section drive when upwards flowing, thereby stir the waste oil in the leading-in section, prevent the waste oil deposit, the waste oil stirs the flabellum and rotates when leading-out section upwards flows in the drive, thereby stir the waste oil in the leading-out section, the waste oil that improves the corner is detained in the leading-out section.

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

Claims

1. A waste oil recovery heating system with an anti-blocking function comprises a heat exchanger (2) and a tower bottom pump (3), wherein the heat exchanger (2) is connected with a tower body (1) of a normal pressure tower, a liquid discharging pipe (4) is arranged at the bottom end of the tower body (1), and the input end of the tower bottom pump (3) is communicated with the bottom end of the liquid discharging pipe (4); the heat exchanger is characterized by further comprising two groups of first communicating pipes (5) and two groups of second communicating pipes (6), the heat exchangers (2) are arranged in two groups, the two groups of heat exchangers (2) are identical in structure, each heat exchanger (2) comprises a shell (7), a plurality of groups of heat exchange vertical pipes (8), an upper pipe plate (9) and a lower pipe plate (10), the top end and the bottom end of each shell (7) are respectively provided with an upper seal head (34) and a lower seal head (35), the upper pipe plate (9) and the lower pipe plate (10) are transversely arranged in the shell (7), the upper pipe plate (9) and the lower pipe plate (10) are respectively positioned in the upper half area and the lower half area of the shell (7), the upper pipe plate (9) and the lower pipe plate (10) divide the interior of the shell (7) into a leading-out section (11), a heat exchange section (12) and a leading-in section (13) from top to bottom, a, the leading-out section (11) is communicated with the heat exchange section (12) through the groups of upper through holes (14), the lower tube plate (10) is provided with a plurality of groups of lower through holes (15), the leading-in section (13) is communicated with the heat exchange section (12) through the groups of lower through holes (15), the groups of upper through holes (14) are respectively positioned right above the groups of lower through holes (15), the top ends of the groups of heat exchange vertical tubes (8) respectively penetrate through the upper through holes (14) into the leading-out section (11) from the heat exchange section (12), the bottom ends of the groups of heat exchange vertical tubes (8) respectively penetrate through the groups of lower through holes (15) into the leading-in section (13) from the heat exchange section (12), the upper half area and the lower half area of the left end of the shell (7) are respectively provided with a molten salt outlet (16) and a molten salt inlet (17), the molten salt outlet (16) and the molten salt inlet (17) are both communicated with the heat exchange section (12), the input ends of the two groups of the first communication pipes, the output of two sets of first communicating pipes (5) stretches into in two sets of leading-in sections (13) respectively from the bottom of two sets of low heads (35) to all be provided with first ooff valve (18) on two sets of first communicating pipes (5), the left end and the right-hand member of tower body (1) all are provided with and return tower mouth (19), the one end of two sets of second communicating pipes (6) stretches into to two sets of sections (11) of deriving respectively from the left end top of two sets of casings (7) in, the other end of two sets of second communicating pipes (6) respectively with two sets of return tower mouth (19) intercommunication to all be provided with second ooff valve (20) on two sets of second communicating pipes (6).

2. The waste oil recovery heating system with the anti-blocking function as claimed in claim 1, wherein a plurality of groups of left baffle plates (21) and a plurality of groups of right baffle plates (22) are arranged in the heat exchange section (12), the left ends of the plurality of groups of left baffle plates (21) are connected with the left side wall of the heat exchange section (12), a space is reserved between the right ends of the plurality of groups of left baffle plates (21) and the right side wall of the heat exchange section (12), the right ends of the plurality of groups of right baffle plates (22) are connected with the right side wall of the heat exchange section (12), a space is reserved between the left ends of the plurality of groups of right baffle plates (22) and the left side wall of the heat exchange section (12), the plurality of groups of left baffle plates (21) and the plurality of groups of right baffle plates (22) are alternately arranged, and through holes for the heat exchange vertical pipes (8) are arranged on the plurality of groups of left baffle plates.

3. An oil-reclaiming and heating system with an anti-blocking function as claimed in claim 2, wherein the top end of the upper head (34) is provided with a vent pipe (23) communicated with the leading-out section (11).

4. An oil-reclaiming and heating system with an anti-clogging function as claimed in claim 3, wherein said heat exchanger (2) is disposed to be inclined toward the side of the molten salt inlet (17) by an angle of 5 °.

5. The waste oil recovery heating system with the anti-blocking function of claim 4, characterized in that the right end of the shell (7) is provided with a drain hole (24) and a drain port (25), the drain hole (24) and the drain port (25) are both communicated with the heat exchange section (12), the level of the drain hole (24) is above the level of the molten salt outlet, the drain port (25) is level with the lower tube plate (10), and a valve is arranged at the drain port (25).

6. An oil reclaiming and heating system with anti-blocking function as claimed in claim 5, further comprising a bottom pump (3) for delivering material at a speed of 4-6m/s, and the heat exchange vertical pipe (8) has an outer diameter of 38 mm.

7. The waste oil recycling heating system with the anti-blocking function as claimed in claim 6, further comprising an upper connecting shaft (26), an upper mounting plate (27), a lower connecting shaft (28) and a lower mounting plate (29), wherein the bottom end of the upper mounting plate (27) is provided with an upper mounting groove, an upper ball bearing (30) is fixedly mounted in the upper mounting groove, the bottom end of the upper connecting shaft (26) is connected with the middle of the top end of the upper tube plate (9), the top end of the upper connecting shaft (26) is inserted into the upper ball bearing (30) from the bottom end of the upper mounting plate (27), the outer side of the upper mounting plate (27) is uniformly provided with a plurality of groups of upper stirring fan blades (31) at equal intervals, the top end of the lower mounting plate (29) is provided with a lower mounting groove, a lower ball bearing (32) is fixedly mounted in the lower mounting groove, the top end of the lower connecting shaft (28) is connected with, the bottom end of the lower connecting shaft (28) is inserted into the lower ball bearing (32) from the top end of the lower mounting plate (29), and a plurality of groups of lower stirring fan blades (33) are uniformly arranged on the outer side of the lower mounting plate (29) at equal intervals.

8. The waste oil reclaiming and heating system with the anti-blocking function as set forth in claim 7, wherein the upper connecting shaft (26), the upper mounting plate (27), the upper agitating fan blades (31), the lower connecting shaft (28), the lower mounting plate (29) and the lower agitating fan blades (33) are made of stainless steel.