A rotary kiln fly ash utilization device and treatment method thereof

Abstract

The invention discloses a rotary kiln fly ash utilization device and a processing method thereof. The rotary kiln fly ash utilization device comprises a cylinder, a kiln head cover and a kiln tail cover. A burner is arranged in the kiln head cover. The burner comprises a combustion cylinder, a burner nozzle and a fly ash pipe. The other end of the fly ash pipe extends to the outside of the combustion cylinder and is connected to a venturi tube. A feed cylinder is arranged on one side of the venturi tube. The surface of the combustion cylinder is connected to a valve body. One side of the valve body is connected to a fuel pipe. A rotating seat is rotatably connected in the valve body. One end of the rotating seat is fixedly connected to a gear. A sliding ring is slidably connected to the surface of the cylinder. A rack meshing with the gear is arranged on one side of the sliding ring. A knocking device is also arranged in the cylinder. A frame adapted to the knocking device is arranged on the surface of the cylinder. A fixed pulley is fixedly connected to the inner wall of the frame. The rotary kiln fly ash utilization device and a processing method thereof realize the reuse of fly ash, save fuel, and reduce air pollution.

Description

Technical Field

[0001] The invention relates to the technical field of fly ash treatment, and in particular to a rotary kiln fly ash utilization device and a treatment method thereof. Background Art

[0002] During the smelting process, during the combustion and gasification process, the minerals in the coal (such as oxides and carbonates of elements such as silicon, aluminum, iron, calcium, magnesium, etc.) are subjected to high temperature, and homogeneous and heterogeneous reactions occur to generate ash. Part of the ash is carried out by the gas to form fly ash. Fly ash is discharged into the atmosphere along with the flue gas. If it is not controlled and treated, it will pollute the environment. These fly ashes contain unburned carbon particles. If these fly ashes are utilized, it can not only save fuel but also protect the environment. However, the existing burners are purchased as a whole and are not designed for fly ash utilization, resulting in limited consumption of fly ash when the diameter of the gas pipe remains unchanged, resulting in the fly ash produced not being consumed in time, and a continuous supply of gas is still required. Therefore, a rotary kiln fly ash utilization device and a treatment method thereof are needed to improve the utilization efficiency of fly ash, save fuel, and reduce air pollution. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies of the prior art, the present invention provides a rotary kiln fly ash utilization device and a treatment method thereof, which realizes the reuse of fly ash, saves fuel, and reduces air pollution.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a rotary kiln fly ash utilization device, comprising a cylinder, a kiln head hood and a kiln tail hood, the kiln head hood and the kiln tail hood are arranged at the two ends of the cylinder, a burner is arranged in the kiln head hood, the burner comprises a combustion barrel, a burner nozzle and a fly ash pipe, the burner nozzle is arranged inside the kiln head hood, a combustion chamber is arranged on one side of the burner nozzle, the combustion barrel is arranged in the middle of the burner nozzle and one end extends into the combustion chamber, the fly ash pipe is arranged in the middle of the combustion barrel and one end extends into the combustion chamber, the other end of the fly ash pipe extends to the outside of the combustion barrel and is connected to a venturi tube, one end of the venturi tube is connected to a blower through an air pipe, and one side of the venturi tube is provided with A feeding barrel, one side of which is provided with a screw feeder, the bottom of the feeding barrel and the top of the venturi tube are connected with a material pipe, the surface of the combustion barrel is connected with a valve body, one side of the valve body is connected with a fuel pipe, a rotating seat is rotatably connected in the valve body, one end of the rotating seat is fixedly connected with a gear, the center thread of the rotating seat is connected with a valve stem, one end of the valve stem is fixedly connected with a valve core, a valve seat adapted to the valve core is provided in the valve body, a sliding ring is slidably connected to the surface of the barrel, a rack meshing with the gear is provided on one side of the sliding ring, a knocking device is also provided in the barrel, a frame adapted to the knocking device is provided on the surface of the barrel, and a fixed pulley is fixedly connected to the inner wall of the frame.

[0007] Preferably, a gas through hole is provided at one end of the combustion tube located in the combustion chamber, and an oxygen passage is provided running through the burner nozzle.

[0008] Preferably, a motor is provided at the top of the feed barrel, and a rotating shaft is rotatably connected to the feed barrel through a support frame, and a rotating disk is fixedly connected to the bottom end of the rotating shaft. A baffle is provided in the feed barrel and below the rotating disk, and through holes are provided on the surfaces of the rotating disk and the baffle. The top end of the rotating shaft is fixedly connected to the output shaft end of the motor, and the feed barrel and the screw feeder are provided with matching brackets.

[0009] Preferably, the valve body is provided in plurality and is evenly distributed along the circumference of the surface of the combustion tube, and a sealing seat adapted to the valve stem is provided in the valve body.

[0010] Preferably, a fixed seat is fixedly connected to the surface of the combustion tube, an electric telescopic rod connected to a sliding ring is provided on one side of the fixed seat, a sliding base adapted to the frame is provided at the bottom of the frame, and an electric telescopic rod 2 for pushing the frame to move is provided on the top side of the sliding base.

[0011] Preferably, the cylinder body includes an outer cylinder and an inner cylinder, a support cylinder is fixedly connected between the outer cylinder and the inner cylinder, the knocking device includes a movable plate, a knocking hammer and a pressure plate, the movable plate is slidably connected to the surface of the support cylinder, the surface of the outer cylinder is fixedly connected to a support seat, the pressure plate is rotatably connected to the support seat, a connecting rod is rotatably connected between one side of the pressure plate and the movable plate, a spring is arranged between one side of the movable plate and the inner wall of the outer cylinder, and the knocking hammer is fixed to the side of the movable plate close to the inner cylinder.

[0012] Preferably, the feed inlet end of the screw feeder is connected to the outlet end of the fly ash silo, and the fuel pipe is connected to the gas pipe.

[0013] A processing method of a rotary kiln fly ash utilization device comprises the following steps:

[0014] Step 1: Use the fly ash collection and transportation system to collect the fly ash, dry and screen the fly ash, remove impurities from it, and transport it to the fly ash silo;

[0015] Step 2: Start the blower, open the valve, deliver the gas into the combustion chamber and ignite it, start the screw feeder and the motor on the top of the feed barrel, and the fly ash enters the combustion chamber through the fly ash pipe to participate in combustion;

[0016] Step 3: Purify the exhaust gas generated by combustion;

[0017] Step 4: Separate and recover metal oxides from the fly ash after combustion to achieve resource recycling.

[0018] Preferably, in step 2, the opening of the regulating valve is adjusted by adjusting the amount of fly ash.

[0019] Preferably, in step four, the fly ash after combustion is collected by starting a knocking device.

[0020] (III) Beneficial effects

[0021] The present invention provides a rotary kiln fly ash utilization device and a treatment method thereof, which has the following beneficial effects:

[0022] (1) This rotary kiln fly ash utilization device, by arranging a plurality of valve bodies on the circumference of the combustion tube, can increase the gas intake compared with the traditional combustion. At the same time, the valve opening can be changed by the movement of the sliding ring, and the intake volume can be adjusted in accordance with the fly ash amount, thereby realizing the recycling of fly ash. At the same time, by cooperating with the rotatable rotating disk in the feed tube, the fly ash amount can also be adjusted to meet different combustion requirements.

[0023] (2) The rotary kiln fly ash utilization device is provided with a knocking device in the cylinder body, so as to facilitate the collection of the ash after combustion, prevent the ash from adhering to the inside of the cylinder body, realize the reuse of the ash, and also realize the cleaning of the inner wall of the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0025] Figure 2 This is a schematic diagram of the connection structure between the combustion tube and the burner nozzle of the present invention;

[0026] Figure 3 For the present invention Figure 1 Enlarged view of point A in the middle;

[0027] Figure 4 For the present invention Figure 2 Enlarged view of point B in the middle;

[0028] Figure 5 It is a schematic diagram of the structure of the striking device of the present invention;

[0029] Figure 6 For the present invention Figure 5 Enlarged view of point C in the middle;

[0030] Figure 7 It is a structural schematic diagram of the movable plate of the present invention.

[0031] In the figure: 1- cylinder, 101- outer cylinder, 102- inner cylinder, 103- support cylinder, 104- moving plate, 105- spring, 106- support seat, 107- pressure plate, 108- connecting rod, 109- percussion hammer, 2- kiln head cover, 3- kiln tail cover, 4- combustion cylinder, 5- combustion nozzle, 6- combustion chamber, 7- fly ash pipe, 8- venturi tube, 9- feed cylinder, 10- screw feeder, 11- material pipe, 12- baffle, 13- support frame, 14- rotating Moving shaft, 15-rotating disk, 16-motor, 17-blower, 18-air pipe, 19-bracket, 20-valve body, 21-fuel pipe, 22-rotating seat, 23-gear, 24-valve stem, 25-valve core, 26-valve seat, 27-sealing seat, 28-sliding ring, 29-rack, 30-oxygen channel, 31-fixed seat, 32-electric telescopic rod 1, 33-sliding base, 34-frame, 35-electric telescopic rod 2, 36-fixed pulley. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-7 The present invention provides a technical solution: a rotary kiln fly ash utilization device, comprising a cylinder 1, a kiln head cover 2 and a kiln tail cover 3, the kiln head cover 2 and the kiln tail cover 3 are arranged at both ends of the cylinder 1, a burner is arranged in the kiln head cover 2, the burner comprises a combustion cylinder 4, a burner 5 and a fly ash pipe 7, the burner 5 is arranged inside the kiln head cover 2, a combustion chamber 6 is arranged on one side of the burner 5, the combustion cylinder 4 is arranged in the middle of the burner 5 and one end extends into the combustion chamber 6, the fly ash pipe 7 is arranged in the middle of the combustion cylinder 4 and one end extends to the combustion chamber 6 Inside, the other end of the fly ash pipe 7 extends to the outside of the combustion tube 4 and is connected to a venturi tube 8, one end of the venturi tube 8 is connected to a blower 17 through an air pipe 18, a feeding barrel 9 is arranged on one side of the venturi tube 8, the bottom of the feeding barrel 9 and the top of the venturi tube 8 are connected with a material pipe 11, a screw feeder 10 is arranged on one side of the feeding barrel 9, the feeding port end of the screw feeder 10 is connected with the outlet end of the fly ash silo, air is blown into the venturi tube 8 through the blower 17, and the fly ash in the fly ash silo enters the fly ash pipe 7.

[0034] A motor 16 is provided at the top of the feed barrel 9, and a rotating shaft 14 is rotatably connected to the feed barrel 9 through a support frame 13. The support frame 13 is a cross structure, and a rotating disk 15 is fixedly connected to the bottom end of the rotating shaft 14. A baffle 12 is provided in the feed barrel 9 and below the rotating disk 15. Through holes are provided on the surfaces of the rotating disk 15 and the baffle 12. The top end of the rotating shaft 14 is fixedly connected to the output shaft end of the motor 16. The rotation speed of the rotating disk 15 is adjusted by the motor 16 to adjust the amount of fly ash. At the same time, the baffle 12 is used to prevent clumped fly ash from entering the venturi tube 8 and causing blockage. The feed barrel 9 and the screw feeder 10 are provided with an adaptive bracket 19.

[0035] The bottom of the feed cylinder 9 and the top of the venturi tube 8 are connected with a feed pipe 11, and the surface of the combustion cylinder 4 is connected with a valve body 20. There are multiple valve bodies 20 that are evenly distributed along the circumference of the surface of the combustion cylinder 4. A sealing seat 27 adapted to the valve stem 24 is provided in the valve body 20.

[0036] A fuel pipe 21 is connected to one side of the valve body 20, and the fuel pipe 21 is connected to the gas pipe. A rotating seat 22 is rotatably connected in the valve body 20, and a gear 23 is fixedly connected to one end of the rotating seat 22. A valve stem 24 is threadedly connected to the center of the rotating seat 22, and a valve core 25 is fixedly connected to one end of the valve stem 24. The valve core 25 is in a conical or truncated cone structure. A valve seat 26 adapted to the valve core 25 is arranged in the valve body 20, and a sliding ring 28 is slidably connected to the surface of the cylinder 1. A rack 29 meshingly connected to the gear 23 is arranged on one side of the sliding ring 28. By moving the sliding ring 28, the gear 23 is driven to rotate through the rack 29, thereby driving the rotating seat 22 to rotate, thereby adjusting the position of the valve core 25, and thereby adjusting the gas flow rate.

[0037] A knocking device is also provided in the cylinder 1, and a frame 34 adapted to the knocking device is provided on the surface of the cylinder 1, a fixed pulley 36 is fixedly connected to the inner wall of the frame 34, a fixed seat 31 is fixedly connected to the surface of the combustion cylinder 4, an electric telescopic rod 32 connected to the sliding ring 28 is provided on one side of the fixed seat 31, a sliding base 33 adapted to the frame 34 is provided at the bottom of the frame 34, and an electric telescopic rod 2 35 for pushing the frame 34 to move is provided on the top side of the sliding base 33, and the movement of the frame 34 can be driven by the electric telescopic rod 2 35.

[0038] A knocking device is used to prevent ash from adhering to the inner surface of the cylinder 1. The cylinder 1 includes an outer cylinder 101 and an inner cylinder 102. A support cylinder 103 is fixedly connected between the outer cylinder 101 and the inner cylinder 102. The knocking device includes a movable plate 104, a knocking hammer 109 and a pressing plate 107. The movable plate 104 is slidably connected to the surface of the support cylinder 103. The surface of the support cylinder 103 is provided with strip holes adapted to the movable plate 104. A support seat 106 is fixedly connected to the surface of the outer cylinder 101. The pressing plate 107 is rotatably connected to the support seat 106. A connecting rod 108 is rotatably connected between one side of the pressing plate 107 and the movable plate 104. A spring 105 is provided between one side of the cylinder 104 and the inner wall of the outer cylinder 101, and a knocking hammer 109 is fixed on the side of the moving plate 104 close to the inner cylinder 102. When knocking is required, the frame 34 is moved so that the fixed pulley 36 is located on one side of the pressure plate 107. During the rotation of the cylinder 1, due to the existence of the fixed pulley 36, the pressure plate 107 is rotated around the support seat 106 and connected, and the moving plate 104 is driven to move by the connecting rod 108, so that the spring 105 is compressed. After the pressure plate 107 rotates past the fixed pulley 36, the moving plate 104 is reset under the action of the spring 105, and the inner cylinder 102 is knocked by the knocking hammer 109, so as to prevent the ash from adhering to the inner wall.

[0039] A gas through hole is provided at one end of the combustion tube 4 located in the combustion chamber 6, and an oxygen passage 30 is provided through the burner nozzle 5 to improve the combustion efficiency.

[0040] A processing method of a rotary kiln fly ash utilization device comprises the following steps:

[0041] Step 1: Use the fly ash collection and transportation system to collect the fly ash, dry and screen the fly ash, remove impurities from it, and transport it to the fly ash silo;

[0042] Step 2: Start the blower, open the valve, deliver the gas into the combustion chamber and ignite it, start the screw feeder and the motor on the top of the feed barrel, and the fly ash enters the combustion chamber through the fly ash pipe to participate in combustion;

[0043] Step 3: Purify the exhaust gas generated by combustion;

[0044] Step 4: Separate and recover metal oxides from the fly ash after combustion to achieve resource recycling.

[0045] In step 2, the opening of the regulating valve is adjusted by adjusting the amount of fly ash to ensure that the fly ash can be burned.

[0046] In step four, the fly ash after combustion is collected by activating the knocking device, thereby realizing the recovery of ash residue.

[0047] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary kiln fly ash utilization device, comprising a cylinder (1), a kiln head cover (2) and a kiln tail cover (3), wherein the kiln head cover (2) and the kiln tail cover (3) are arranged at both ends of the cylinder (1), characterized in that: A burner is arranged in the kiln head cover (2), and the burner comprises a combustion tube (4), a burner nozzle (5) and a fly ash pipe (7). The burner nozzle (5) is arranged in the kiln head cover (2), and a combustion chamber (6) is arranged on one side of the burner nozzle (5). The combustion tube (4) is arranged in the middle of the burner nozzle (5) and one end of the burner nozzle (5) extends into the combustion chamber (6). The fly ash pipe (7) is arranged in the middle of the combustion tube (4) and one end of the burner nozzle (7) extends into the combustion chamber (6). The other end of the fly ash pipe (7) extends to the outside of the combustion tube (4) and is connected to a venturi tube (8). One end of the venturi tube (8) is connected to a blower (17) through an air pipe (18). A feed tube (9) is arranged on one side of the venturi tube (8), and a screw feeder (10) is arranged on one side of the feed tube (9). The bottom of the feed tube (9) and the top of the venturi tube (8) are connected to a material pipe (17). 11), the surface of the combustion cylinder (4) is connected to a valve body (20), one side of the valve body (20) is connected to a fuel pipe (21), a rotating seat (22) is rotatably connected inside the valve body (20), one end of the rotating seat (22) is fixedly connected to a gear (23), a valve stem (24) is threadedly connected to the center of the rotating seat (22), one end of the valve stem (24) is fixedly connected to a valve core (25), a valve seat (26) adapted to the valve core (25) is provided inside the valve body (20), a sliding ring (28) is slidably connected to the surface of the cylinder (1), one side of the sliding ring (28) is provided with a rack (29) meshingly connected to the gear (23), a knocking device is also provided inside the cylinder (1), a frame (34) adapted to the knocking device is provided on the surface of the cylinder (1), and a fixed pulley (36) is fixedly connected to the inner wall of the frame (34); The cylinder body (1) comprises an outer cylinder (101) and an inner cylinder (102); a support cylinder (103) is fixedly connected between the outer cylinder (101) and the inner cylinder (102); the knocking device comprises a movable plate (104), a knocking hammer (109) and a pressure plate (107); the movable plate (104) is slidably connected to the surface of the support cylinder (103); a support seat (106) is fixedly connected to the surface of the outer cylinder (101); the pressure plate (107) is rotatably connected to the support seat (106); a connecting rod (108) is rotatably connected between one side of the pressure plate (107) and the movable plate (104); a spring (105) is provided between one side of the movable plate (104) and the inner wall of the outer cylinder (101); and the knocking hammer (109) is fixed to a side of the movable plate (104) close to the inner cylinder (102).

2. A rotary kiln fly ash utilization device according to claim 1, characterized in that: A gas through hole is provided at one end of the combustion tube (4) located in the combustion chamber (6), and an oxygen passage (30) is provided running through the burner nozzle (5).

3. The rotary kiln fly ash utilization device according to claim 1, characterized in that: A motor (16) is arranged at the top of the feed barrel (9), a rotating shaft (14) is rotatably connected to the feed barrel (9) via a support frame (13), a rotating disk (15) is fixedly connected to the bottom end of the rotating shaft (14), a baffle (12) is arranged in the feed barrel (9) and below the rotating disk (15), through holes are arranged on the surfaces of the rotating disk (15) and the baffle (12), the top end of the rotating shaft (14) is fixedly connected to the output shaft end of the motor (16), and the feed barrel (9) and the screw feeder (10) are provided with an adaptive bracket (19).

4. A rotary kiln fly ash utilization device according to claim 1, characterized in that: The valve body (20) is provided with a plurality of valves which are evenly distributed along the circumference of the surface of the combustion cylinder (4), and a sealing seat (27) adapted to the valve stem (24) is provided in the valve body (20).

5. The rotary kiln fly ash utilization device according to claim 1, characterized in that: A fixed seat (31) is fixedly connected to the surface of the combustion cylinder (4); an electric telescopic rod (32) connected to the sliding ring (28) is arranged on one side of the fixed seat (31); a sliding base (33) adapted to the frame (34) is arranged at the bottom of the frame (34); and an electric telescopic rod (35) for pushing the frame (34) to move is arranged on one side of the top of the sliding base (33).

6. The rotary kiln fly ash utilization device according to claim 1, characterized in that: The feed inlet end of the screw feeder (10) is in communication with the outlet end of the fly ash silo, and the fuel pipe (21) is in communication with the gas pipe.

7. A processing method for a rotary kiln fly ash utilization device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1: Use the fly ash collection and transportation system to collect the fly ash, dry and screen the fly ash, remove impurities from it, and transport it to the fly ash silo; Step 2: Start the blower, open the valve, deliver the gas into the combustion chamber and ignite it, start the screw feeder and the motor on the top of the feed barrel, and the fly ash enters the combustion chamber through the fly ash pipe to participate in combustion; Step 3: Purify the exhaust gas generated by combustion; Step 4: Separate and recover metal oxides from the fly ash after combustion to achieve resource recycling.

8. The processing method of the rotary kiln fly ash utilization device according to claim 7, characterized in that: In step 2, the valve opening is adjusted according to the amount of fly ash.

9. The processing method of a rotary kiln fly ash utilization device according to claim 7, characterized in that: In step four, the fly ash after combustion is collected by activating the knocking device.

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