TWI441910B - Reactor tank scraper - Google Patents

Description

Reactor scraper

The present invention relates to a scraper, and more particularly to a horizontal reactor scraper.

With the rise of the chemical and chemical industries, the application of chemical products in people's daily life has become more and more widespread, followed by the disposal of some chemical wastes, such as waste plastics and waste tires. Waste plastics and waste tires are almost impossible to be naturally decomposed in nature, so they need to be reused by hand. Therefore, in recent years, waste plastics, waste tire refining, and gas-fired power generation have been used. The use of waste plastics, waste tire refining and gasification power generation requires a device, which is a cracking furnace. The prior art waste plastic and waste tire refining cracking furnaces are divided into vertical furnaces and horizontal furnaces, but in production. In the process, the shortcomings of vertical or horizontal furnaces that have been found in the society of waste plastics and waste tires are as follows: Since waste plastics contain unpredictable windings (such as iron wire and steel wire), when vertical reaction is adopted When the kettle cracks the material, the stirring shaft is easily entangled by the windings in the material, causing the reactor to stop repairing in the middle; when the horizontal reactor is used, although the problem of the material winding can be avoided, of course, it saves the material to be cracked. The sorting process, but since the horizontal reactor is a non-mixing device, there is no function of the scraping device. However, the horizontal reactor relies on the rotation of the kettle body, and the liquid flow is driven by the wall of the kettle. Therefore, the heat transfer is uneven, the liquid flow area is small, and the liquid flow static zone may be generated. The cracking liquid of the waste plastic and waste tire is viscous. Body, whether the stirring speed of the vertical furnace or the speed of the horizontal furnace body is usually very low, the movement of the fluid can only be extended to a short distance and not enough to overcome the viscosity of the fluid, resulting in high temperature coking or low temperature coking of the kettle body. The phenomenon makes the hot surface coke quickly. When working (hour) for about 60 hours, the thickness of the coke layer can reach 10-20mm, forming thermal resistance, causing deformation of the kettle body, shortening the safe use period of the reactor, wasting a lot of energy, wasting production man hours, especially workers. During the process of clearing the coke, it is working in an extremely harsh crude carbon black dust environment for a long time, which seriously affects the health of the operator.

In view of the above-mentioned prior art horizontal cracking furnace without scraper, the phenomenon of coking is easy to occur, and the present invention provides a scraper which can be applied to the inner wall of a horizontal reactor for scraping wall treatment, which can effectively prevent the reaction. The inner wall of the kettle is cokeed.

The technical solution adopted by the present invention to solve the technical problem is: a reactor wall scraper, the scraper includes a support plate and a scraper disposed on the support plate, the support plate is spiral, and more than one of the support plates is opened on both sides The guide groove, the two ends of the scraper are disposed in the guide groove through the support shaft, and the scraper can rotate along the support shaft.

The technical solution adopted by the present invention to solve the technical problem thereof further includes: the position of the guide groove on the opposite surface of the support plate corresponds to the position. The scraper has an anchor shape in cross section, a triangular blade at the bottom, a connecting rod connected to the knife edge, and a support shaft fixed at both ends of the scraper. The longitudinal length of the scraper is the same as the pitch of the spiral support plate. The transverse length of the blade of 15 is greater than the vertical length from the support shaft of the blade to the inner wall of the reactor to which it is applied. A chrome steel support plate is arranged around the guide groove.

The invention has the beneficial effects that the invention creates a novel method for scraping the wall of the reaction kettle, and solves and fills the current anchor type agitator, propeller type, slurry type, turbine type and the like, and the belt type, The screw-type agitator and the existing scraping wall type agitating tank have special special significance for the defects of the waste plastic, the waste tire cracking and the pulverized material in the catalytic reactor. The invention adopts the shaftless scraper scraping wall device, utilizes the random inertial force generated by the rotational inertia and the fluid self-pressure, strengthens the heat transfer effect, prevents the coke formation of the reactor wall, and the total heat transfer coefficient is no scratch wall. The horizontal rotary reactor is increased by 30%, which solves the problem of rapid coking of the existing horizontal rotary reactor, and the focal thickness is even more than ten millimeters, resulting in a low heat transfer coefficient, which is similar to the problem of adiabatic operation.

The invention will be further described with reference to the drawings and specific embodiments.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present embodiment is a preferred embodiment of the present invention, and other principles and basic structures that are identical or similar to the present embodiment are within the scope of the present invention.

The main body of the present invention is a spiral blade support frame 4. In this embodiment, a plurality of guide grooves 7 are formed on both sides in the extending direction of the blade holder 4, that is, the guide groove 7 is parallel to the spiral direction of the blade holder 4. The guide grooves 7 on the opposite sides of the blade holder 4 are correspondingly arranged, and the guide groove 7 serves as a guide tool for the blade 2. In this embodiment, a chrome steel plate 8 is fixed around the guide groove 7 to increase the strength around the guide groove 7, and to reduce the wear of the guide groove 7 when the blade 2 slides, thereby prolonging the service life of the present invention.

Referring to FIG. 2, in the embodiment, the scraper 2 has an anchor shape in cross section, that is, a scraper head having a triangular cross section at the bottom of the scraper 2, and a connecting rod is disposed on the scraper head, and the overall shape of the cross section is similar to the anchor used on the ship. shape. The longitudinal ends of the scraper 2 are respectively provided with a support shaft 10, and the longitudinal ends of the scraper 2 are respectively hung in the guide groove 7 by the support shaft 10, so that the scraper 2 can be freely rotated along the support shaft 10, and the transverse length of the scraper 2 is larger than From the support shaft 10 of the scraper 2 to the vertical length of the inner wall of the reaction vessel 9, it is ensured that the scraper 2 is in contact with the inner side of the reaction vessel 9, and the longitudinal length of the scraper 2 is the same as the pitch of the spiral support frame 4, which ensures the maximum scraper 2 The effect on the inner wall of the reactor 9 in the range.

The scraping method of the present invention is such that the support shaft 10 of the scraper 2 is a swing center, and the scraper 2 slides along the guide groove 7 with the rotation of the reaction vessel 9, and the inner wall of the reactor 9 is randomly scraped, and the reaction is effectively thinned. The sticking material of the hot boundary layer of the kettle prevents the inner wall of the reactor 9 from being too thick, and slows the coking speed of the inner wall of the reaction vessel 9, and the scraper 2 also acts to scrape the heat flow close to the wall surface of the knife edge, and the reaction kettle The cold fluid in the middle of the 9 is evenly mixed to increase the heat transfer coefficient and save energy. In the upper end of the scraper support frame 4, a plurality of lateral flow guiding fins 6 are arranged in the spiral direction of the scraper support frame 4. In this embodiment, the mounting angle of the guiding fin 6 is 15-30° from the supporting point (ie, the guiding fin) The angle between the plane of the sheet 6 and the tangent of the support frame 4 at its support point is 10-30°, thereby forcing the fluid heat transfer motion.

The specific application of the present invention will be further described below in conjunction with a horizontal reactor to which the present invention is applied. Referring to Fig. 1, Fig. 2 and Fig. 3, the horizontal reaction kettle 9 is of a drum type, lying on the side, and can be rotated in both directions, the reaction kettle 9 is arranged in the furnace body, the furnace body is horizontally rounded, and the furnace chamber is chamber-ignited. The furnace and the heat source 11 are disposed under the reaction vessel 9. The chimney of the reactor body 9 is provided with a chimney on the upper side of the furnace body. The chimney can be square-shaped rounded corners, and a multi-layer water curtain device is arranged in the chimney to reduce exhaust gas and dust discharged by the present invention. The rotation of the reaction kettle 9 uses a three-phase motor as a power source, and the belt drives the gear to perform the shifting, and then drives the reaction vessel 9 to rotate. The central axis positions of the two ends of the reaction vessel 9 each open a working hole, and the diameters of the two working are different, wherein The larger diameter hole is the material feed port 12, and the other smaller diameter hole is the air outlet port 13, and the air outlet port 13 can be connected to the next stage of the oil refining device.

In this embodiment, the reaction vessel 9 is provided with a spiral baffle 5 having a triangular cross section (in this embodiment, the triangular spiral baffle 5 has three functions of a heat spreader, a feed driving device and an automatic slag discharging device. In the present embodiment, the baffle 5 is hollow, and the baffle 5 contains the heat transfer oil 3. In the embodiment, the baffle 5 has a spiral shape, and the bottom edge of the triangular cross section is closely attached to the inner wall of the reaction vessel 9. Settings. The blade holder 4 is disposed on the triangular tip of the spiral heat conducting sheet 5 along the spiral direction of the deflector 5, and the blade holder 4 is mounted in parallel with the heat conducting sheet 5, and the blade holder 4 can also serve as an auxiliary for the heat conducting sheet 5. Thermally conductive parts. When the reaction vessel 9 is rotated in the clockwise direction, the thermal conductive sheet 5 acts as a feed driving device to accelerate the material input; when the reaction vessel 9 rotates counterclockwise, the thermal conductive sheet 5 serves as an automatic slag discharging device, and the waste residue is automatically sent. The waste residue is discharged to the slag opening 14 provided at the end of the spiral baffle 5, and the heat transfer fin 5 is filled with the heat transfer oil 3 as a heat transfer medium to enhance the heat transfer performance.

In the specific application, the baffle 5 may not be provided in the reaction vessel, and the present invention is directly mounted on the inner wall of the reaction vessel 9, and is used as the baffle 5 by the present invention.

The invention creatively creates a novel method for scraping the wall of the reaction kettle, and specifically solves and fills the current anchor type agitator, propeller type, slurry type, turbine type and the like, and the ribbon type and screw type agitator. And the existing scraping wall type stirred tank has special and special significance for the defects of the waste plastic, the waste tire cracking and the pulverized material in the catalytic reactor. The invention adopts the shaftless scraper scraping wall device, utilizes the random inertial force generated by the rotational inertia and the fluid self-pressure, strengthens the heat transfer effect, prevents the coke formation of the reactor wall, and the total heat transfer coefficient is no scratch wall. The horizontal rotary reactor is increased by 30%, which solves the problem of rapid coking of the existing horizontal rotary reactor, and the focal thickness is even more than ten millimeters, resulting in a low heat transfer coefficient, which is similar to the problem of adiabatic operation.

1. . . Liquid level

2. . . scraper

3. . . Heat transfer oil

4. . . Support plate

5. . . Baffle

6. . . Guide fin

7. . . Guide slot

8. . . Pallet

9. . . Reactor

10. . . Support shaft

11. . . Heat source

12. . . Inlet

13. . . Air outlet

14. . . Slag outlet

Figure 1 is a schematic view showing the overall and internal structure of the present invention applied to a reaction vessel.

2 is a schematic view showing the structure of a cut surface of the present invention applied to a reaction vessel.

Figure 3 is a schematic partial cross-sectional view showing the side of the reaction vessel of the present invention.

1. . . Liquid level

2. . . scraper

3. . . Heat transfer oil

4. . . Support plate

5. . . Baffle

6. . . Guide fin

7. . . Guide slot

8. . . Pallet

9. . . Reactor

10. . . Support shaft

11. . . Heat source

Claims (6)

A reactor wall scraper, characterized in that: the scraper comprises a support plate and a scraper disposed on the support plate, the support plate is spiral, and more than one guide groove is arranged on both sides of the support plate, the scraper Both ends are disposed in the guide groove through the support shaft, and the scraper is rotatable along the support shaft. The reactor wall scraper according to claim 1, wherein the position of the guide groove on the opposite surface of the support plate corresponds to the position. The reactor wall scraper according to claim 1, wherein the scraper has an anchor cross section, a triangular blade at the bottom, a connecting rod connected to the knife edge, and a support shaft fixed at both ends of the scraper . The reactor wall scraper according to claim 1, wherein the longitudinal length of the scraper is the same as the pitch of the spiral support plate. The reactor wall scraper of claim 1, wherein the scraper has a transverse length greater than a vertical length from the support shaft of the scraper to the inner wall of the reactor to be used. The reactor wall scraper according to claim 1, wherein the guide groove is provided with a chrome steel plate around the guide groove.