Rotary cylindrical reactor

Abstract

Provided is a rotating cylindrical reaction apparatus in which a raw material filled in a rotating cylindrical body and an atmospheric gas such as introduced hydrogen gas are brought into good contact with each other by stirring, thereby allowing the reaction to proceed rapidly. 【Solution means】A plurality of lifter plates 12b and a plurality of baffle plates 12c are erected from the outer peripheral surface of an inner cylinder in a reaction space 12a defined by the inner peripheral surface of an outer cylinder 21 and the outer peripheral surface of the inner cylinder 22. The reaction space is divided into a plurality of reaction chambers 12d by lifter plates paired in the radial direction and baffle plates paired in the axial direction, and a passage 12e that communicates reaction chambers adjacent in the axial direction and a passage 12f that communicates reaction chambers adjacent in the radial direction are formed. As the rotating cylindrical body rotates, the reaction chambers rotate, and the raw material supplied to the reaction space is scraped up from the bottom to the top of the rotating cylindrical body by the lifter plates. The scraped-up raw material moves to adjacent reaction chambers through the passages 12e and 12f, and is efficiently stirred with the hydrogen gas staying at the upper part of the rotating cylindrical body.

Description

Technical Field

[0001] The present invention relates to a rotary cylindrical reactor, and more specifically, it includes a horizontally installed rotary cylindrical body, supplies a raw material to be processed to this rotary cylindrical body, and Hydrogen gas introduces it to react the two, and relates to a rotary cylindrical reactor.

Background Art

[0002] Titanium, whose applications have been expanding in recent years, such as aircraft jet engines, turbine blades, chemical devices requiring corrosion resistance, and medical devices that do not cause rejection reactions in the body, is obtained by reducing an ore called ilmenite. However, since its binding force with oxygen is strong, refining by direct reduction of the ore is impossible. Therefore, first, the raw ore (ilmenite) is mixed with coke or the like and heated for primary reduction. Next, chlorine gas is passed through to obtain titanium tetrachloride, magnesium is added to this titanium tetrachloride, and magnesium chloride and crude titanium are obtained from the titanium tetrachloride. However, the crude titanium has a low degree of purification and cannot be used as metallic titanium. Therefore, this crude titanium is subjected to a re-reduction treatment.

[0003] For the re-reduction treatment of crude titanium, a rotary cylindrical reactor as disclosed in Japanese Patent Application Laid-Open No. 2023-39794 is used. This device is a type of rotary kiln and includes a horizontally placed rotary cylindrical body. The rotary cylindrical body is provided with an atmosphere gas inlet, a supply port for the raw material to be processed, and a discharge port for the processed raw material. This rotary cylindrical body is installed inclined so as to descend from the supply port toward the discharge port.

[0004] According to this device, crude titanium is supplied to the rotary cylindrical body and filled with hydrogen gas, and the two are stirred for reduction treatment. The treated compositional titanium is moved from the supply port side to the discharge port side along the axial direction of the rotary cylindrical body by its own weight and recovered from the discharge port.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In this type of rotary cylindrical reactor, the filling amount of the raw material supplied to the rotary cylinder that moves from the supply port side to the discharge port side along the axial direction without clogging depends on the inclination angle of the rotary cylinder, but is approximately limited to about 30% of the cross-sectional area of the cylinder. The supplied raw material moves along the bottom of the cylinder, and a space with a cross-sectional area of 70% where there is no raw material is formed at the upper part of the rotary cylinder.

[0007] When crude titanium is supplied to the rotary cylinder and filled with hydrogen gas, the crude titanium and hydrogen gas react inside the rotary cylinder to generate steam. However, the gas density of hydrogen gas is 0.08 kg / m 3 while the gas density of steam is 1.5 - 2 kg / m 3 , and the gas density of steam is more than 20 times heavier than that of hydrogen gas. Therefore, as schematically shown in Fig. 11, a layer of light hydrogen gas b is formed in the upper layer of the space formed in the upper part of the rotary cylinder a, and a layer of heavy steam c is formed in the lower layer. As a result, the hydrogen gas b in the upper part and the crude titanium of the raw material d at the bottom are separated by the layer of steam c, so that poor contact occurs between the compositional titanium of the raw material d and the hydrogen gas b, and the progress of the reduction reaction is hindered.

[0008] In view of such problems, the present invention provides a rotary cylindrical reactor in which, when the raw material filled in the rotary cylinder and the With hydrogen gas are stirred, the two can be in good contact with each other, and thus the reaction can proceed rapidly.

Means for Solving the Problems

[0009] The invention according to claim 1 comprises a horizontally installable rotary cylinder, and with the rotation of the rotary cylinder, the raw material and Hydrogen gas inside the rotary cylinder are stirred to Reduction react them, and it is a rotary cylindrical reactor The rotating cylindrical body has a double-cylinder structure composed of a concentric outer cylinder and an inner cylinder, the cross-sectional shape is annular between the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder, and a reaction space extending along the axial direction of the rotating cylindrical body is partitioned and formed in the middle part of the rotating cylindrical body, on the outer peripheral surface of the inner cylinder Having a rhombic cross-sectional shape with four inclined sides a plurality of lifter plates are erected and arranged along the axial direction of the rotating cylindrical body, and a plurality of baffle plates are erected and arranged along the Circumferential direction of the rotating cylindrical body, the reaction space is partitioned and formed into a plurality of reaction chambers by the lifter plates forming pairs in the radial direction and the baffle plates forming pairs in the axial direction, a passage communicating the reaction chambers adjacent in the axial direction and Circumferential direction a passage communicating the reaction chambers adjacent to as the rotating cylindrical body rotates, the reaction chambers rotate When hydrogen gas is introduced to the upper part of the reaction space, the raw material is scraped up from the bottom to the top of the rotating cylindrical body by the lifter plates, It moves along the inclined side surface of the lifter plate and goes from the passage to the reaction chamber adjacent in the axial direction and the reaction chamber adjacent in the circumferential direction and is made to move. This is the feature.

Advantages of the Invention

[0010] According to the invention described in claim 1, as the rotating cylindrical body rotates, the reaction chambers rotate, the raw material is scraped up from the bottom to the top of the rotating cylindrical body by the lifter plates, and the scraped-up raw material moves to the adjacent reaction chambers through the passages. Therefore, the Hydrogen gas staying at the upper part of the rotating cylindrical body and the raw material are efficiently stirred, so the opportunity for contact between the two increases and the reaction is promoted.

[0011] As the rotating cylindrical body rotates, the raw material moves in the axial direction or the radial direction along the inclined side surface of the lifter panel, so Hydrogen gas is efficiently stirred and mixed, and the reaction between the raw material and Hydrogen gas is promoted.

[0012] When the raw material is scraped up by the lifter plates as the reaction chambers rotate, the raw material moves in both the front and rear directions and the radial direction along the inclined side surface and falls into the passages, so the raw material and Hydrogen gas are more effectively stirred and mixed.

Brief Description of the Drawings

[0013]

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[0014] The following is an explanation of the present invention Reference example based on the drawings. FIG. 1 shows a rotating cylindrical reactor 10 according to the present invention Reference example . The rotating cylindrical reactor 10 includes a rotating cylindrical body 12 horizontally installed on a common bed 11. One end of the common bed 11 is assembled to a base 14 so as to be tiltable in the vertical direction with a shaft 13 as a fulcrum, and the other end is supported by a tilting cylinder 15 fixed to the base 14 so as to be vertically movable.

[0015] The rotating cylindrical body 12 has tires 16 and 17 fitted to the outer peripheral portions of both left and right ends, and each of the tires 16 and 17 is placed on a tire receiving roller 18 rotatably assembled to the common bed 11. A gear 19 is integrally provided on one of the tires 17, and a drive motor (not shown in detail) is drivingly connected to this gear 19. The rotating cylindrical body 12 can be inclined by an inclination cylinder 15 and can be rotated by a drive motor.

[0016] The rotating cylindrical body 12 has a double-cylinder structure composed of an outer cylinder 21 and an inner cylinder 22. The outer cylinder 21 has openings at both left and right end faces, and manholes 23 and 24 cover each opening. The inner cylinder 22 has an opening at its right end face 22a, the left end is covered by a conical lid 22b, and a boss 22c projects from the center of the lid 22b. The right end face of the inner cylinder 22 is fixed to the right manhole 23 via a bracket 22d. And as shown in FIG. 2, since the boss 22c at the left end is connected to the middle part of the outer cylinder 21 via a suspension fitting 22d, the inner cylinder 22 rotates integrally with the outer cylinder 21 concentrically. And a reaction space 12a with an annular cross-sectional shape extending along the axial direction of the rotating cylindrical body 12 is partitioned and formed in the middle part of the rotating cylindrical body 12 between the inner peripheral surface of the outer cylinder 21 and the outer peripheral surface of the inner cylinder 22.

[0017] An exhaust port 23a and a raw material supply port 23b are provided in the right manhole 23 of the rotating cylindrical body 12. An exhaust hood 26 is connected to the exhaust port 23a, and a supply screw 27a of a raw material supply machine 27 is connected to the raw material supply port 23b. Hydrogen gas and an inlet 24b for Hydrogen gas are provided in the left manhole 24 of the rotating cylindrical body 12. A discharge hood 28 is connected to the discharge port 24a, and a gas introduction pipe 29 for introducing

[0018] Inside the manhole 24 on the left side, a lifter 30 is provided to scrape up the raw materials from the bottom of the rotating cylindrical body 12 and feed them into the discharge hood 28. On the inner peripheral surface on the right side of the rotating cylindrical body 12, a supply side spiral 31 is provided to feed the raw materials fed into the rotating cylindrical body 12 by the supply screw 23b to the middle part of the rotating cylindrical body 12. Further, on the inner peripheral surface on the left side of the rotating cylindrical body 12, a discharge side spiral 32 with a reverse lead from the supply side spiral 31 is provided. An electric heater 33 is installed on the outer periphery of the middle part of the rotating cylindrical body 12.

[0019] As shown in detail in FIG. 3, in the reaction space 12a partitioned by the inner peripheral surface of the outer cylinder 21 and the outer peripheral surface of the inner cylinder 22, a plurality of lifter plates 12b and a plurality of baffle plates 12c are erected from the outer peripheral surface of the inner cylinder 22. Each lifter plate 12b has a paddle shape and is arranged in a straight line along the axial direction of the rotating cylindrical body 12, and as shown in FIG. 4, they are arranged at equal angular intervals in the radial direction. As shown in FIG. 5, the baffle plates 12c are arranged at equal angular intervals so as to form a straight line along the radial direction of the rotating cylindrical body 12, and divide the linearly arranged lifter plates 12b. Then, the reaction space 12a is partitioned into a plurality of reaction chambers 12d by the lifter plates 12b forming pairs in the radial direction and the baffle plates 12c forming pairs in the axial direction, and a passage 12e communicating the reaction chambers 12d adjacent in the axial direction and a passage 12f communicating the reaction chambers 12d adjacent in the radial direction are formed.

[0020] The configuration of the rotary cylindrical reaction device 10 is as described above. Hereinafter, as an example, the operation procedure when the raw material, crude titanium, is subjected to a re-reduction treatment in a continuous operation method will be described. The rotating cylindrical body 12 is moved downward by the tilting cylinder 15, and the rotating cylindrical body 12 is tilted about three times so as to descend from the supply port 23b side to the discharge port 24a side. The raw material 40 is continuously fed into the rotating cylindrical body 12 from the supply port 23b by the raw material feeder 27, hydrogen gas is continuously introduced from the gas introduction pipe 29, and the rotating cylindrical body 12 is rotated by a drive motor (not shown).

[0021] The input raw material 40 moves by its own weight from the supply port 23b side to the discharge port 24a side within the reaction space 12a. As shown in FIG. 6, as the rotary cylinder 12 rotates, the raw material 40 is scraped up from the bottom to the top of the rotary cylinder 12 by the lifter plate 12b. The scraped-up raw material 40 moves through the passages 12e and 12f to the adjacent reaction chamber 12d and is stirred with hydrogen gas.

[0022] When the raw material and hydrogen are stirred and come into contact in the reaction space 12a, water is generated by a reduction reaction. Since the reduction reaction is an exothermic reaction, the generated water becomes water vapor, and the water vapor and excess hydrogen gas are discharged from the exhaust hood 26 to the outside of the rotary cylinder 12. On the other hand, the raw material 40 that has been reduced in the rotary cylinder 12 is sent to the discharge hood 28 by the lifter 30 and recovered from the discharge hood 28 into the container 41.

[0023] This According to the rotary cylindrical reaction device 10, as the rotary cylinder 12 rotates, the reaction chamber 12d rotates, and the raw material 40 supplied to the reaction space 12a is scraped up from the bottom to the top of the rotary cylinder 12 by the lifter plate 12b. The scraped-up raw material 40 moves through the passages 12e and 12f to the adjacent reaction chamber 12d. Therefore, the raw material 40 is efficiently stirred with the hydrogen gas staying in the upper part of the rotary cylinder 12, so the contact opportunity between the two increases and the reaction is promoted.

[0024] The above-described rotary cylindrical reaction device 10 can be operated not only in continuous operation but also in batch operation. In that case, the raw material 40 is supplied to the rotary cylinder 12 tilted only during raw material supply. After the supply, the rotary cylinder 12 is installed horizontally and operated for a predetermined time. The raw material 40 supplied to the rotary cylinder 12 is sent to the discharge port 24a side by the supply-side spiral 31 and sent to the supply port 23b side by the discharge-side spiral 32, so it is stirred with hydrogen gas in the reaction space 12a in the middle part of the rotary cylinder 12. Then, after a predetermined time has elapsed, the rotation of the rotary cylinder 12 is stopped, and it is tilted again to discharge the raw material 40 from the discharge port 24a.

Example

[0025] Of the present invention ExampleThe rotary cylindrical reactor 50 according to [this] is shown in FIGS. 7 to 10. Of the above-mentioned reference example In the rotary cylindrical reactor 10, a blade-shaped lifter plate 12b was projected on the outer peripheral surface of the inner cylinder 22. However, in this embodiment, a lifter plate 42 having a rhombic cross-sectional shape is projected on the inner cylinder 22. This lifter plate 42 has four inclined side surfaces 42a, and a long diagonal line 42b extends along the axis of the rotary cylindrical body, and a short diagonal line 42c is fixed to the outer peripheral surface of the inner cylinder 22 so as to be orthogonal to the long diagonal line 42b.

[0026] When the raw material 40 is scraped up by the lifter plate 42 as the reaction chamber 12d rotates, the raw material 40 moves along the inclined side surface 42a and falls into the passages 12e and 12f. At this time, the raw material 40 moves in both the front and rear directions along the axis of the rotary cylindrical body 12 and also moves in both the up and down directions along the radial direction of the rotary cylindrical body 12. Therefore, the raw material 40 and Hydrogen gas are more effectively stirred and mixed. In addition, since other configurations of this embodiment are the same as those of the rotary cylindrical reactor 10, the same reference numerals are given to the same components and the description thereof is omitted.

[0027] In addition to the reduction reaction, the above-described rotary cylindrical reactor 10 can be applied to reactions such as oxidation, nitridation, halogenation, etc., or reverse reactions such as denitrification, dehalogenation, etc., and further to a process of finely pulverizing a metal such as a neodymium alloy of a magnetic metal material by utilizing the phenomenon of hydrogen embrittlement in which hydrogen enters the grain boundaries of the metal structure and makes the metal brittle.

Explanation of Reference Numerals

[0028] 10... Rotary cylindrical reactor 12... Rotary cylindrical body 12a... Reaction space 12b... Lifter plate 12c... Baffle plate 12d... Reaction chamber 12e... Passage 12f... Passage 21... Outer cylinder 22... Inner cylinder 23... Manhole 23a... Exhaust port 23b……Supply port of raw material 24…Manhole 24a…Discharge port of raw material 24b… Hydrogen gas Inlet of 40…Raw material 42…Lifter plate 42a…Slanted side surface

Claims

【Claim 1】 A rotary cylindrical reactor comprising a rotatable cylindrical body that can be installed horizontally, and stirring raw materials and hydrogen gas inside the rotatable cylindrical body as the rotatable cylindrical body rotates to cause a reduction reaction between the two, wherein the rotatable cylindrical body has a double-cylinder structure composed of concentric outer and inner cylinders, a reaction space with an annular cross-sectional shape is defined in the middle part of the rotatable cylindrical body by the inner peripheral surface of the outer cylinder and the outer peripheral surface of the inner cylinder, and extends along the axial direction of the rotatable cylindrical body, a plurality of lifter plates with a rhombic cross-sectional shape having four inclined side surfaces on the outer peripheral surface of the inner cylinder are erected and arranged along the axial direction of the rotatable cylindrical body, and a plurality of baffle plates are erected and arranged along the circumferential direction of the rotatable cylindrical body, the reaction space is partitioned into a plurality of reaction chambers by the lifter plates forming pairs in the radial direction and the baffle plates forming pairs in the axial direction, a passage for communicating reaction chambers adjacent in the axial direction and a passage for communicating reaction chambers adjacent in the circumferential direction are formed, when the reaction chambers rotate as the rotatable cylindrical body rotates, hydrogen gas is introduced to the upper part of the reaction space, the raw materials are scraped up from the bottom to the top of the rotatable cylindrical body by the lifter plates, move along the inclined side surfaces of the lifter plates, and move to the reaction chambers adjacent in the axial direction and the reaction chambers adjacent in the circumferential direction from the passage. A rotary cylindrical reactor characterized by the above.

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