A kind of alumina recovery full oxygen boiling kiln capable of heat recovery

Abstract

The present invention discloses a heat-recyclable alumina full oxygen boiling kiln, which relates to the technical field of boiling furnaces. The heat-recyclable alumina full oxygen boiling kiln comprises a boiling kiln, an ignition port is arranged on the left side of the boiling kiln, a support seat is fixedly connected to the bottom of the boiling kiln, a connecting pipe is fixedly connected to the right side of the boiling kiln, and a heating box is fixedly connected to the right side of the connecting pipe. The heat-recyclable alumina full oxygen boiling kiln disperses the raw materials through a stirring mechanism, and the stirring rod also plays a role in stirring the raw materials, so that the raw materials falling into the boiling kiln are scattered to be better heated, thereby improving the efficiency of refining alumina, and the hot gas from the combustion contacts the heat conducting plate, so that the heat conducting plate absorbs the heat in the hot air flow to heat the water on the top of the isolation plate to generate water vapor, so as to recycle the excess heat energy.

Description

Technical Field

[0001] The invention relates to the technical field of fluidized bed furnaces, in particular to a full-oxygen fluidized bed furnace capable of recycling heat and recovering aluminum oxide. Background Art

[0002] A fluidized bed kiln is a high-temperature furnace that adds raw materials into the furnace body and calcines them under the action of oxygen or oxidants. The fluidized bed kiln has the characteristics of high thermal efficiency, high yield, low energy consumption and low emissions.

[0003] The patent with announcement number "CN117663121A" discloses a full-oxygen combustion boiling furnace, which relates to the technical field of boiling furnaces, including a furnace body, wherein combustion ports and smoke exhaust ports are respectively arranged on both sides of the furnace body, and a fire barrier wall is arranged inside the furnace body. A feed pipe is inserted into the upper part of one side of the furnace body, and a feed hopper is arranged at the end of the feed pipe away from the furnace body, and a screening assembly is arranged on the upper part of the feed hopper, and a material dispersing assembly is arranged in the furnace body at the end of the feed pipe away from the feed hopper.

[0004] In the actual process of using a fluidized bed kiln to recover alumina from raw materials, the location of the materials is often too concentrated, which is not conducive to uniform heating of the raw materials for refining alumina in the fluidized bed kiln, thus resulting in low refining efficiency of the raw materials. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a heat-recoverable alumina full-oxygen boiling kiln to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a heat-recyclable alumina full oxygen boiling kiln, comprising a boiling kiln, an ignition port is arranged on the left side of the boiling kiln, a support seat is fixedly connected to the bottom of the boiling kiln, a connecting pipe is fixedly connected to the right side of the boiling kiln, a heating box is fixedly connected to the right side of the connecting pipe, a support frame is fixedly connected to the bottom of the heating box, a stirring mechanism is fixedly connected inside the boiling kiln, and a feeding mechanism is fixedly connected to the left side of the stirring mechanism inside the boiling kiln;

[0007] The stirring mechanism includes:

[0008] A fixing rod, wherein the fixing rod is fixedly connected to the top of the boiling kiln;

[0009] A rotating tube, the rotating tube is movably connected to the outer wall of the fixed rod, and the rotating tube is rotatably connected to the fixed rod through a bearing;

[0010] The fan blades are fixedly connected to the outer wall of the rotating tube.

[0011] Preferably, a fuel inlet is fixedly connected to the back of the boiling kiln, an air distribution plate is fixedly connected to the bottom of the fixed rod at the bottom of the boiling kiln, a blower is fixedly connected to the bottom of the air distribution plate at the bottom of the boiling kiln, three baffle plates are fixedly connected to the right side of the air distribution plate at the bottom of the boiling kiln, a slag discharge port is fixedly connected to the right side of the leftmost baffle plate at the bottom of the boiling kiln, an isolation plate is fixedly connected to the top of the connecting pipe at the bottom of the heating box, and a heat conduction plate is fixedly connected to the bottom of the isolation plate.

[0012] Preferably, a spring 1 is fixedly connected to the bottom of the rotating tube, a rotating rod is fixedly connected to the bottom of the spring 1, and two semi-circular disks are fixedly connected to the outer wall of the rotating rod.

[0013] Preferably, a long inclined plate is fixedly connected to the top of the semi-disc, a bottom inclined plate is fixedly connected to the outer wall of the semi-disc, a short inclined plate is fixedly connected to the top of the semi-disc, and a plurality of stirring rods are fixedly connected to the outer wall of the semi-disc.

[0014] Preferably, the inner wall of the fuel inlet is located inside the boiling kiln and is movably connected to a fixed long rod, and the fixed long rod is movably connected to the inside of the fuel inlet through a bearing, the outer wall of the fixed long rod is located at a position corresponding to the stirring rod and is fixedly connected to several linkage rods, the outer wall of the fixed long rod is located inside the boiling kiln and is fixedly connected to a cone, and the outer wall of the cone is fixedly connected to several cone oblique strips.

[0015] Preferably, the feeding mechanism includes a feeding pipe fixedly connected to the left side of the boiling kiln, and a feeding funnel fixedly connected to the top of the feeding pipe.

[0016] Preferably, the bottom of the feed pipe is located inside the feed pipe and is fixedly connected to a limiting frame, the limiting frame is fixedly connected to an impact rod, the outer wall of the impact rod is movably connected to a limiting block, and the limiting block is fixedly connected to the inside of the feed pipe, the limiting frame is fixedly connected to a spring 2 at one end close to the feed pipe, the other end of the spring 2 which is fixedly connected to the limiting block is fixedly connected to a fixed block, and the fixed block is fixedly connected to the inside of the feed pipe.

[0017] Preferably, the outer wall of the impact rod is movably connected with a plurality of shaking plates, and the connection between the shaking plates and the impact rod is rotationally connected, and the outer wall of the limiting frame is fixedly connected with protrusions at corresponding positions of the corresponding shaking plates.

[0018] The present invention provides a heat-recycling alumina full oxygen boiling kiln.

[0019] Beneficial effects:

[0020] 1. The heat-recyclable alumina full-oxygen boiling kiln, through the airflow generated by combustion will flow through the fan blades, so that the fan blades rotate, and together drive the rotating tube to rotate. The fixed rod drives the two semi-circular disks to rotate through a spring transmission, so that part of the raw materials fall through the gap between the two semi-circular disks, and the raw materials are thrown upward and spread around by centrifugal force to make the raw materials dispersed. The stirring rod also plays a role in stirring the raw materials, so that the raw materials falling into the boiling kiln can be scattered to better heat, thereby improving the efficiency of refining alumina.

[0021] 2. The heat-recyclable alumina full-oxygen boiling kiln is driven to rotate by a fixed long rod. When the fuel flows into the boiling kiln from the fuel inlet, the cone will disperse the fuel. The cone will push the incoming fuel through the tapered strips on the outer wall, giving the fuel a centrifugal force and pushing the fuel close to the outer wall of the cone outward, so that the fuel becomes more dispersed, so that the fuel can be burned more fully, and the combustion temperature can be increased, thereby improving the efficiency of refining alumina.

[0022] 3. The heat-recyclable alumina full-oxygen boiling kiln is pushed by the impact rod, and the impact rod will continuously move up and down. When the impact rod moves upward, the shaking plate will be pushed down by the raw materials and close to the protruding block. When the impact rod moves downward, the rear shaking plate will be pulled and expanded by the action of the raw materials, and the raw materials will be pulled down to prevent the raw materials from being blocked inside the feed pipe, which can indirectly improve the efficiency of refining alumina.

[0023] 4. The heat-recyclable alumina full-oxygen boiling kiln is squeezed by spring two, and then the spring two pushes out the impact rod, which plays a role of impacting the semi-circular disk, and the fixed rod will shake under the action of spring one, which can further make the raw materials in contact with the two semi-circular disks become more dispersed under the action of shaking, which can improve the efficiency of refining alumina. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main stereoscopic structure of the present invention;

[0025] Figure 2 It is a top view of the three-dimensional structure of the present invention;

[0026] Figure 3 It is a right-side stereoscopic structural schematic diagram of the present invention;

[0027] Figure 4 It is a bottom-up three-dimensional structural schematic diagram of the present invention;

[0028] Figure 5 It is a schematic cross-sectional structure diagram of a boiling furnace of the present invention;

[0029] Figure 6 for Figure 5 The enlarged structural diagram of the middle B part;

[0030] Figure 7 This is a schematic diagram of the rotating tube structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the fixed long rod structure of the present invention;

[0032] Fig. 9 for Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0033] Fig.10 It is a schematic diagram of the structure of the impact rod of the present invention;

[0034] Fig.11 for Fig.10 Schematic diagram of the enlarged structure of part C in the middle.

[0035] In the figure: 1. boiling kiln; 101. support base; 102. connecting pipe; 103. heating box; 104. isolation plate; 105. heat conducting plate; 106. support frame; 107. baffle plate; 108. fuel inlet; 109. slag outlet; 110. blower; 111. air distribution plate; 2. stirring mechanism; 201. fixed rod; 202. rotating tube; 203. fan blade; 204. spring 1; 205. rotating rod; 206. Semicircular disc; 207, short inclined plate; 208, long inclined plate; 209, stirring rod; 210, bottom inclined plate; 211, fixed long rod; 212, linkage rod; 213, cone; 214, cone inclined strip; 3, feeding mechanism; 301, feeding pipe; 302, feeding funnel; 303, limiting frame; 304, impact rod; 305, spring two; 306, limit block; 307, fixed block; 308, shaking plate; 309, raised block. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0038] Embodiment 1

[0039] See also Figure 1-8The present invention provides a technical solution: a heat-recyclable alumina full oxygen boiling kiln, comprising a boiling kiln 1, an ignition port is arranged on the left side of the boiling kiln 1, a support seat 101 is fixedly connected to the bottom of the boiling kiln 1, a connecting pipe 102 is fixedly connected to the right side of the boiling kiln 1, a heating box 103 is fixedly connected to the right side of the connecting pipe 102, a support frame 106 is fixedly connected to the bottom of the heating box 103, a stirring mechanism 2 is fixedly connected inside the boiling kiln 1, and a feeding mechanism 3 is fixedly connected to the left side of the stirring mechanism 2 inside the boiling kiln 1;

[0040] The stirring mechanism 2 comprises:

[0041] A fixing rod 201, the fixing rod 201 is fixedly connected to the top of the boiling kiln 1;

[0042] A rotating tube 202, the rotating tube 202 is movably connected to the outer wall of the fixed rod 201, and the rotating tube 202 is rotatably connected to the fixed rod 201 through a bearing;

[0043] The fan blades 203 are fixedly connected to the outer wall of the rotating tube 202, and the airflow generated by the combustion will flow through the fan blades 203, causing the fan blades 203 to rotate.

[0044] A fuel inlet 108 is fixedly connected to the back of the boiling kiln 1, an air distribution plate 111 is fixedly connected to the bottom of the fixed rod 201 at the bottom of the boiling kiln 1, a blower 110 is fixedly connected to the bottom of the air distribution plate 111 at the bottom of the boiling kiln 1, three baffle plates 107 are fixedly connected to the right side of the air distribution plate 111 at the bottom of the boiling kiln 1, a slag discharge port 109 is fixedly connected to the right side of the leftmost baffle plate 107 at the bottom of the boiling kiln 1, an isolation plate 104 is fixedly connected to the top of the connecting pipe 102 at the heating box 103, a heat conducting plate 105 is fixedly connected to the bottom of the isolation plate 104, the heat conducting plate 105 absorbs heat in the hot air flow to heat the water on the top of the isolation plate 104 to generate water vapor, so as to recycle excess heat energy.

[0045] A spring 204 is fixedly connected to the bottom of the rotating tube 202 , a rotating rod 205 is fixedly connected to the bottom of the spring 204 , and two semi-circular disks 206 are fixedly connected to the outer wall of the rotating rod 205 .

[0046] A long inclined plate 208 is fixedly connected to the top of the semi-circular disk 206 , a bottom inclined plate 210 is fixedly connected to the outer wall of the semi-circular disk 206 , a short inclined plate 207 is fixedly connected to the top of the semi-circular disk 206 , and a plurality of stirring rods 209 are fixedly connected to the outer wall of the semi-circular disk 206 .

[0047] The inner wall of the fuel inlet 108 is located inside the boiling kiln 1 and is movably connected to a fixed long rod 211, and the fixed long rod 211 is movably connected to the inside of the fuel inlet 108 through a bearing, the outer wall of the fixed long rod 211 is located at a position corresponding to the stirring rod 209 and is fixedly connected to a plurality of linkage rods 212, the outer wall of the fixed long rod 211 is located inside the boiling kiln 1 and is fixedly connected to a cone 213, and the outer wall of the cone 213 is fixedly connected to a plurality of cone oblique strips 214.

[0048] The feeding mechanism 3 includes a feeding pipe 301 fixedly connected to the left side of the boiling kiln 1 , and a feeding funnel 302 fixedly connected to the top of the feeding pipe 301 .

[0049] When in use, start the blower 110. The blower 110 will blow the outside air into the boiling kiln 1 through the air distribution plate 111, inject the fuel into the boiling kiln 1 through the fuel inlet 108, and ignite through the ignition port on the left side of the boiling kiln 1. The airflow generated by the combustion will flow through the fan blades 203, causing the fan blades 203 to rotate, thereby driving the rotating tube 202 to rotate. The rotating rod 205 drives the two semi-circular disks 206 to rotate through the spring 1 204, and then the raw materials are added to the feeding funnel 302. The raw materials slide into the boiling kiln 1 through the feeding pipe 301. When the raw materials slide out from the bottom of the feeding pipe 301, they will fall onto the top of the rotating rod 205. During the rotation of the rotating rod 205, part of the raw materials will fall through the gap between the two semi-circular disks 206. The long inclined plate 208 on the top of the rotating semi-circular disk 206 will intercept the raw materials, and under the action of the inclined surface, The raw materials will be thrown upward and spread around by centrifugal force to make the raw materials dispersed. At the same time, during the rotation of the semi-disc 206, the short inclined plate 207 will make part of the raw materials that fall in at the same time have the same effect as the long inclined plate 208. The rest will stay briefly near the center of the semi-disc 206 and then fall in from the gap. The semi-disc 206 drives the bottom inclined plate 210 to rotate, which will slow down the fall of the raw materials falling from the gap. The stirring rod 209 will also play a role in stirring the raw materials, so as to scatter the raw materials that fall into the boiling kiln 1 for better heating. The hot air from the combustion will then flow into the connecting pipe 102, and then flow into the bottom of the isolation plate 104 inside the heating box 103. The heat conducting plate 105 will absorb the heat in the hot air flow to heat the water on the top of the isolation plate 104 to generate water vapor, so as to recycle the excess heat energy.

[0050] When the two semi-circular disks 206 drive the stirring rod 209 to rotate, the linkage rod 212 will drive the fixed long rod 211 to rotate. When the fuel flows into the boiling kiln 1 from the fuel inlet 108, it will be dispersed due to the action of the cone 213. The cone 213 will be driven to rotate by the fixed long rod 211, which will allow the cone 213 to push the incoming fuel through the cone oblique strips 214 on the outer wall, giving the fuel a centrifugal force, and pushing the fuel close to the outer wall of the cone 213 outward, so that the fuel becomes more dispersed, so that the fuel can be burned more fully.

[0051] Embodiment 2

[0052] See also Figure 1-11 Based on the first embodiment, the present invention provides a technical solution:

[0053] The bottom of the feed pipe 301 is located inside the feed pipe 301 and is fixedly connected to a limiting frame 303, the limiting frame 303 is fixedly connected to a striking rod 304, the outer wall of the striking rod 304 is movably connected to a limiting block 306, and the limiting block 306 is fixedly connected to the inside of the feed pipe 301, and one end of the limiting frame 303 close to the feed pipe 301 is fixedly connected to a spring 2 305, and the other end of the spring 2 305 fixedly connected to the limiting block 306 is fixedly connected to a fixed block 307, and the fixed block 307 is fixedly connected to the inside of the feed pipe 301.

[0054] The outer wall of the impact rod 304 is movably connected with several shaking plates 308, and the connection between the shaking plate 308 and the impact rod 304 is a rotational connection. The outer wall of the limiting frame 303 is located at the corresponding position of the corresponding shaking plate 308 and is fixedly connected with a protrusion block 309. When the impact rod 304 moves upward, the shaking plate 308 will be pushed downward by the raw material and close to the protrusion block 309. When the impact rod 304 moves downward, the rear shaking plate 308 will be pulled to unfold under the action of the raw material and pull the raw material downward.

[0055] When in use, when the rotating rod 205 rotates, the long inclined plate 208 and the short inclined plate 207 at the top of the rotating rod 205 will intermittently push the impact rod 304. When pushing, the impact rod 304 will move outward and squeeze the spring 2 305, and then the spring 2 305 will push the impact rod 304 out. The impact rod 304 will play a role of hitting the semi-circular disk 206, and under the action of the spring 1 204, the rotating rod 205 will shake, which can further make the raw materials contacting the two semi-circular disks 206 shake. Under the action of movement, it will become more dispersed. When the two semi-disks 206 rotate, the impact rod 304 is pushed by the parts on the semi-disks 206, and the impact rod 304 produces continuous up and down movement. When the impact rod 304 moves upward, the shaking plate 308 will be pushed down and close to the protruding block 309 by the raw materials. When the impact rod 304 moves downward, the rear shaking plate 308 will be pulled and unfolded under the action of the raw materials, and the raw materials will be pulled downward to prevent the raw materials from being blocked inside the feed pipe 301.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat-recoverable alumina all-oxygen boiling kiln, comprising a boiling kiln (1), characterized in that: An ignition port is arranged on the left side of the boiling kiln (1); a support seat (101) is fixedly connected to the bottom of the boiling kiln (1); a connecting pipe (102) is fixedly connected to the right side of the boiling kiln (1); a heating box (103) is fixedly connected to the right side of the connecting pipe (102); a support frame (106) is fixedly connected to the bottom of the heating box (103); a stirring mechanism (2) is fixedly connected inside the boiling kiln (1); and a stirring mechanism (2) is located inside the boiling kiln (1). (2) A feeding mechanism (3) is fixedly connected on the left side; the stirring mechanism (2) comprises: a fixed rod (201), the fixed rod (201) is fixedly connected to the top of the boiling kiln (1); a rotating tube (202), the rotating tube (202) is movably connected to the outer wall of the fixed rod (201), and the rotating tube (202) is rotatably connected to the fixed rod (201) through a bearing; and a fan blade (203), the fan blade (203) is fixedly connected to the outer wall of the rotating tube (202); The back of the fluidized bed kiln (1) is fixedly connected with a fuel inlet (108); the bottom of the fluidized bed kiln (1) is fixedly connected with an air distribution plate (111) at the bottom of the fixed rod (201); the bottom of the fluidized bed kiln (1) is fixedly connected with a blower (110) at the bottom of the air distribution plate (111); three baffles (107) are fixedly connected to the right side of the air distribution plate (111) at the bottom of the fluidized bed kiln (1); a slag discharge port (109) is fixedly connected to the right side of the baffle (107) at the leftmost side of the bottom of the fluidized bed kiln (1); an isolation plate (104) is fixedly connected to the top of the connecting pipe (102) at the inside of the heating box (103); and a heat conduction plate (105) is fixedly connected to the bottom of the isolation plate (104); The bottom of the rotating tube (202) is fixedly connected to a spring 1 (204), the bottom of the spring 1 (204) is fixedly connected to a rotating rod (205), and the outer wall of the rotating rod (205) is fixedly connected to two semi-circular disks (206); The top of the semi-circular disk (206) is fixedly connected to a long inclined plate (208), the outer wall of the semi-circular disk (206) is fixedly connected to a bottom inclined plate (210), the top of the semi-circular disk (206) is fixedly connected to a short inclined plate (207), and the outer wall of the semi-circular disk (206) is fixedly connected to a plurality of stirring rods (209).

2. The heat-recyclable alumina all-oxygen boiling kiln according to claim 1, characterized in that: The inner wall of the fuel inlet (108) is located inside the boiling kiln (1) and is movably connected to a fixed long rod (211), and the fixed long rod (211) is movably connected to the inside of the fuel inlet (108) through a bearing, the outer wall of the fixed long rod (211) is located at a position corresponding to the stirring rod (209) and is fixedly connected to a plurality of linkage rods (212), the outer wall of the fixed long rod (211) is located inside the boiling kiln (1) and is fixedly connected to a cone (213), and the outer wall of the cone (213) is fixedly connected to a plurality of cone oblique strips (214).

3. The heat-recyclable alumina all-oxygen boiling kiln according to claim 2, characterized in that: The feeding mechanism (3) comprises a feeding pipe (301) fixedly connected to the left side of the boiling kiln (1), and a feeding funnel (302) fixedly connected to the top of the feeding pipe (301).

4. The heat-recyclable alumina all-oxygen boiling kiln according to claim 3, characterized in that: The bottom of the feed pipe (301) is located inside the feed pipe (301) and is fixedly connected to a limiting frame (303); the limiting frame (303) is fixedly connected to an impact rod (304); the outer wall of the impact rod (304) is movably connected to a limiting block (306), and the limiting block (306) is fixedly connected to the inside of the feed pipe (301); one end of the limiting frame (303) close to the feed pipe (301) is fixedly connected to a spring 2 (305); the other end of the spring 2 (305) fixedly connected to the limiting block (306) is fixedly connected to a fixed block (307), and the fixed block (307) is fixedly connected to the inside of the feed pipe (301).

5. The heat-recyclable alumina all-oxygen boiling kiln according to claim 4, characterized in that: The outer wall of the impact rod (304) is movably connected to a plurality of shaking plates (308), and the connection between the shaking plates (308) and the impact rod (304) is rotatably connected. The outer wall of the limiting frame (303) is fixedly connected to the corresponding positions of the corresponding shaking plates (308) with protruding blocks (309).

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