A vacuum pyrolysis device for heavy benzene-containing waste liquid

Abstract

The utility model relates to pyrolysis equipment field, concretely relates to a kind of heavy benzene-containing waste liquid vacuum pyrolysis device, including vacuum pump unit, heating box, heat conducting oil heating device and condensing device, heating box is provided with pyrolysis box, the both ends of pyrolysis box are provided with support tube, the outside of heating box is provided with support frame, support frame is provided with the drive mechanism connected with one of support tube, support frame is provided with first pipeline, vacuum pump unit includes vacuum pipe, vacuum pipe is connected with first pipeline, the end of first pipeline is rotatably and sealingly connected with end cap, eccentricity is provided with the beam extending into pyrolysis box on end cap, beam is provided with annular scraper, heat conducting oil heating device includes with heating chamber connection's back liquid pipe and with the lower end of heating box connection's delivery pipe, the other end of heating box is provided with mounting bracket, mounting bracket is provided with second pipeline, the end of second pipeline is connected with condensing device.The utility model has the effect of scraping the substance remaining in the inner wall of pyrolysis box.

Description

Technical Field

[0001] This utility model relates to the field of pyrolysis equipment, specifically to a vacuum pyrolysis device for waste liquid containing heavy benzene. Background Technology

[0002] In chemical production, benzene-containing wastewater is generally treated using vacuum pyrolysis. Vacuum pyrolysis lowers the pyrolysis temperature. During the pyrolysis process, solid residues, liquid products, and gaseous products are generated. Solid residues include inorganic substances and carbonized materials, liquid products include tar and incompletely decomposed organic matter, and gaseous products include combustible gases such as hydrogen, methane, and carbon monoxide.

[0003] Solid residues tend to remain inside the pyrolysis device after pyrolysis. If they are not removed, they will accumulate and affect subsequent pyrolysis. Therefore, it is particularly necessary to develop a vacuum pyrolysis device that can remove these solid residues. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum pyrolysis device for waste liquid containing heavy benzene, which has the function of scraping off the substances remaining on the inner wall of the pyrolysis tank.

[0005] The technical solution adopted is as follows:

[0006] A vacuum pyrolysis device for heavy benzene-containing waste liquid includes a vacuum pump unit, a heating chamber, a heat transfer oil heating device, and a condensing device. A pyrolysis chamber is housed inside the heating chamber, with support pipes at both ends. The two support pipes extend coaxially and both extend to the outside of the pyrolysis chamber, forming a rotatable seal connection between the support pipes and the pyrolysis chamber. A support frame is located outside the heating chamber, and a drive mechanism connected to one of the support pipes is mounted on the support frame. A first pipe is mounted on the support frame, and its end is rotatably sealed to the end of a support pipe fitted with a gear ring. The vacuum pump unit includes a vacuum pipe connected to the first pipe, with an end cap rotatably sealed to the end of the first pipe. An eccentrically mounted crossbeam extending into the pyrolysis chamber is mounted on the end cap, and the crossbeam is equipped with an annular scraper. The heat transfer oil heating device includes a return pipe connected to the heating chamber and a delivery pipe connected to the lower end of the heating chamber. A mounting frame is located at the other end of the heating chamber, with a second pipe mounted on the mounting frame. The second pipe is rotatably sealed to the other support pipe, and its end is connected to the condensing device. A feed pipe with a valve is located on the side of the second pipe.

[0007] Preferably, the drive mechanism includes a drive gear, and a gear ring is provided on the outer side of one of the support tubes, the gear ring meshing with the drive gear.

[0008] Preferably, the pyrolysis chamber is spherical.

[0009] Preferably, the rotating mechanism includes a driven gear, which is coaxially and fixedly connected to the end cover. A telescopic mechanism is provided on the support frame, and the telescopic mechanism is connected to a rack that meshes with the driven gear.

[0010] Preferably, a temperature sensor is installed inside the heating box.

[0011] Compared to existing technologies, the advantages are:

[0012] After pyrolysis is completed, the end cover is rotated by the rotating mechanism to bring the annular scraper into contact with the inner wall of the pyrolysis chamber. The rotation of the pyrolysis chamber and the annular scraper scrape off the substances remaining on the inner wall of the pyrolysis chamber, so as to avoid the residue left during the pyrolysis process from affecting subsequent pyrolysis. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a vacuum pyrolysis device for heavy benzene-containing waste liquid according to the present invention.

[0014] Figure 2 yes Figure 1 A schematic diagram of the structure at point A in the middle.

[0015] Figure 3 This is a front view schematic diagram of a vacuum pyrolysis device for heavy benzene-containing waste liquid according to this utility model.

[0016] Figure 4 This is a top view schematic diagram of a vacuum pyrolysis device for heavy benzene-containing waste liquid according to this utility model.

[0017] In the diagram: 1. Vacuum pump unit; 2. Heating box; 3. Heat transfer oil heating device; 4. Condensation device; 5. Pyrolysis box; 6. Support pipe; 7. Support frame; 8. Drive mechanism; 9. Drive gear; 10. Gear ring; 11. First pipe; 12. Vacuum tube; 13. End cap; 14. Crossbeam; 15. Annular scraper; 16. Driven gear; 17. Telescopic mechanism; 18. Rack; 19. Conveying pipe; 20. Return pipe; 21. Temperature sensor; 22. Mounting bracket; 23. Second pipe; 24. Feed pipe; 25. Valve. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments, such as... Figures 1 to 4 As shown:

[0019] Example 1: A vacuum pyrolysis device for heavy benzene-containing waste liquid includes a vacuum pump unit 1, a heating box 2, a heat transfer oil heating device 3, and a condensation device 4. A pyrolysis box 5 is installed inside the heating box 2. Support pipes 6 are installed at both ends of the pyrolysis box 5. The two support pipes 6 extend coaxially and both extend to the outside of the pyrolysis box 5. The support pipes 6 and the pyrolysis box 5 are rotatably sealed together.

[0020] A support frame 7 is provided on the outside of the heating box 2. A drive mechanism 8 is provided on the support frame 7. The drive mechanism 8 is connected to one of the support tubes 6. The drive mechanism 8 drives the support tube 6 to rotate, thereby driving the pyrolysis box 5 to rotate inside the heating box 2. A first pipe 11 is provided on the support frame 7. The first pipe 11 is rotatably and sealingly connected to the end of the support tube 6 on which the toothed ring 10 is installed. The vacuum pump unit 1 includes a vacuum tube 12, which is connected to the first pipe 11. The vacuum pump unit 1 evacuates the pyrolysis box 5 through the vacuum tube 12 and the first pipe 11. An end cap 13 is rotatably and sealingly connected to the end of the first pipe 11. A crossbeam 14 extending into the pyrolysis box 5 is eccentrically provided on the end cap 13. The crossbeam 14 is provided with an annular scraper 15. A rotating mechanism connected to the end cap 13 is provided on the support frame 7. The rotating mechanism drives the end cap 13 to rotate.

[0021] The heat transfer oil heating device 3 includes a heating chamber, an electric heating tube installed inside the heating chamber, a power supply and control unit connected to the electric heating tube installed outside the heating chamber, a delivery pump installed in the heating chamber, the delivery pump includes a suction pipe and a delivery pipe 19, the delivery pipe 19 is connected to the lower end of the heating box 2, the upper end of the heating box 2 is provided with a return pipe 20 connected to the heating chamber, both the heating chamber and the heating box 2 are filled with heat transfer oil, the electric heating tube in the heating chamber heats the heat transfer oil and then delivers it to the heating box 2 via the delivery pump.

[0022] The other end of the heating box 2 is provided with a mounting bracket 22, and a second pipe 23 is provided on the mounting bracket 22. The second pipe 23 is rotatably and sealedly connected to another support pipe 6. The end of the second pipe 23 is connected to a condensing device 4. The condensing device 4 condenses the gas generated by the pyrolysis of benzene-containing waste liquid and recovers the corresponding substances. A feed pipe 24 is provided on the side of the second pipe 23, and a valve 25 is provided on the feed pipe 24.

[0023] Example 2: A vacuum pyrolysis device for heavy benzene-containing waste liquid includes a vacuum pump unit 1, a heating box 2, a heat transfer oil heating device 3, and a condensation device 4. A pyrolysis box 5 is installed inside the heating box 2. Support pipes 6 are installed at both ends of the pyrolysis box 5. The two support pipes 6 extend coaxially and both extend to the outside of the pyrolysis box 5. The support pipes 6 and the pyrolysis box 5 are rotatably sealed together.

[0024] A support frame 7 is provided on the outside of the heating box 2. A drive mechanism 8 is provided on the support frame 7. The drive mechanism 8 includes a drive gear 9. A gear ring 10 is provided on the outside of one of the support tubes 6. The gear ring 10 meshes with the drive gear 9. The drive mechanism 8 drives the support tube 6 to rotate, thereby driving the pyrolysis box 5 to rotate inside the heating box 2. The pyrolysis box 5 is spherical. The spherical pyrolysis box 5 has less damping inside the heating box 2.

[0025] The support frame 7 is provided with a first pipe 11, which is rotatably and sealed to the end of the support tube 6 on which the gear ring 10 is installed. The vacuum pump unit 1 includes a vacuum tube 12, which is connected to the first pipe 11. The vacuum pump unit 1 evacuates the pyrolysis box 5 through the vacuum tube 12 and the first pipe 11. The end of the first pipe 11 is rotatably and sealed to an end cap 13. A crossbeam 14 extending into the pyrolysis box 5 is eccentrically provided on the end cap 13. The crossbeam 14 is provided with an annular scraper 15. The support frame 7 is provided with a rotating mechanism connected to the end cap 13.

[0026] The rotating mechanism includes a driven gear 16, which is coaxially and fixedly connected to the end cover 13. A telescopic mechanism 17 is provided on the support frame 7. The telescopic mechanism 17 is connected to a rack 18 that meshes with the driven gear 16. The telescopic mechanism 17 controls the rack 18 to extend and retract, thereby causing the end cover 13 to rotate and change the position of the annular scraper 15.

[0027] The heat transfer oil heating device 3 includes a heating chamber, an electric heating tube installed inside the heating chamber, and a power supply and control unit connected to the electric heating tube installed outside the heating chamber. The heating chamber is equipped with a delivery pump, which includes a suction pipe and a delivery pipe 19. The delivery pipe 19 is connected to the lower end of the heating box 2. The upper end of the heating box 2 is equipped with a return pipe 20 connected to the heating chamber. Both the heating chamber and the heating box 2 are filled with heat transfer oil. The electric heating tube in the heating chamber heats the heat transfer oil and then delivers it to the heating box 2 via the delivery pump. The heating box 2 is equipped with a temperature sensor 21, which is used to detect the temperature of the heat transfer oil in the heating box 2.

[0028] The other end of the heating box 2 is provided with a mounting bracket 22, and a second pipe 23 is provided on the mounting bracket 22. The second pipe 23 is rotatably and sealedly connected to another support pipe 6. The end of the second pipe 23 is connected to a condensing device 4. The condensing device 4 condenses the gas generated by the pyrolysis of benzene-containing waste liquid and recovers the corresponding substances. A feed pipe 24 is provided on the side of the second pipe 23, and a valve 25 is provided on the feed pipe 24.

[0029] The working principle is as follows:

[0030] During pyrolysis, the vacuum pump unit 1 first evacuates the pyrolysis chamber 5 to a vacuum state. Then, the benzene-containing waste liquid is fed into the pyrolysis chamber 5 through the feed pipe 24. After that, the valve 25 is closed, and the heat transfer oil is fed into the heating chamber 2. At the same time, the drive mechanism 8 is started to drive the pyrolysis chamber 5 to rotate. The rotation of the pyrolysis chamber 5 pyrolyzes the benzene-containing waste liquid. The gas generated by pyrolysis enters the condensation device 4 for condensation and is recovered to the corresponding position. After one pyrolysis is completed, the control end cover 13 of the rotation mechanism rotates to make the annular scraper 15 contact the inner wall of the pyrolysis chamber 5. The rotation of the pyrolysis chamber 5 and the annular scraper 15 scrape off the substances remaining on the inner wall of the pyrolysis chamber 5. The scraped-off substances are then extracted from the feed pipe 24 by the external dust collection equipment to avoid long-term residue that may affect the pyrolysis.

Claims

1. A vacuum pyrolysis device for waste liquid containing heavy benzene, characterized in that: The system includes a vacuum pump unit (1), a heating chamber (2), a heat transfer oil heating device (3), and a condensation device (4). A pyrolysis chamber (5) is installed inside the heating chamber (2). Support pipes (6) are installed at both ends of the pyrolysis chamber (5). The two support pipes (6) extend coaxially and both extend to the outside of the pyrolysis chamber (5). The support pipes (6) are rotatably and sealed to the pyrolysis chamber (5). A support frame (7) is installed on the outside of the heating chamber (2). A drive mechanism (8) connected to one of the support pipes (6) is installed on the support frame (7). A first pipe (11) is installed on the support frame (7). The first pipe (11) is rotatably and sealed to the end of the support pipe (6) on which a gear ring (10) is installed. The vacuum pump unit (1) includes a vacuum tube (12). The first pipe (11) is connected to the end of the first pipe (11) with a rotatable sealing connection to the end cap (13). The end cap (13) is eccentrically provided with a crossbeam (14) extending into the pyrolysis box (5). The crossbeam (14) is provided with an annular scraper (15). The heat transfer oil heating device (3) includes a return pipe (20) connected to the heating chamber and a conveying pipe (19) connected to the lower end of the heating box (2). The other end of the heating box (2) is provided with a mounting bracket (22). The mounting bracket (22) is provided with a second pipe (23). The second pipe (23) is rotatably sealed connected to another support pipe (6). The end of the second pipe (23) is connected to a condensing device (4). The side of the second pipe (23) is provided with a feed pipe (24). The feed pipe (24) is provided with a valve (25).

2. The vacuum pyrolysis device for heavy benzene-containing waste liquid as described in claim 1, characterized in that: The drive mechanism (8) includes a drive gear (9), and a gear ring (10) is provided on the outer side of one of the support tubes (6), which meshes with the drive gear (9).

3. The vacuum pyrolysis device for heavy benzene-containing waste liquid as described in claim 1, characterized in that: The pyrolysis box (5) is spherical.

4. The vacuum pyrolysis device for heavy benzene-containing waste liquid as described in claim 1, characterized in that: The rotating mechanism includes a driven gear (16), which is coaxially fixedly connected to the end cover (13). A telescopic mechanism (17) is provided on the support frame (7), and the telescopic mechanism (17) is connected to a rack (18) that meshes with the driven gear (16).

5. The vacuum pyrolysis device for heavy benzene-containing waste liquid as described in claim 1, characterized in that: A temperature sensor (21) is installed inside the heating box (2).

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