CN217844673U - Electric heating type calcining rotary kiln - Google Patents
Electric heating type calcining rotary kiln Download PDFInfo
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- CN217844673U CN217844673U CN202221468226.0U CN202221468226U CN217844673U CN 217844673 U CN217844673 U CN 217844673U CN 202221468226 U CN202221468226 U CN 202221468226U CN 217844673 U CN217844673 U CN 217844673U
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Abstract
The utility model discloses an electric heating type calcining rotary kiln, which comprises a kiln barrel, wherein the kiln barrel is axially and fixedly arranged in a furnace chamber of a heating furnace body, and a plurality of electric heating wires are arranged in a heating cavity at the bottom of the kiln barrel; two ends of the kiln cylinder body extend out of the heating furnace body, the feeding end of the kiln cylinder body is connected with a feeding box, the discharging end of the kiln cylinder body is connected with a discharging box, two ends of the kiln cylinder body are rotatably supported on a front towing wheel and a rear riding wheel through a front rolling ring and a rear rolling ring respectively, the front towing wheel and the rear riding wheel are both rotatably arranged on a movable frame, the bottom of the movable frame is provided with a fixed frame, one end of the fixed frame, close to the discharging box, is hinged with the outer wall of the heating furnace body, and the other end of the fixed frame is hinged with the outer wall of the heating furnace body through a hydraulic oil cylinder; the kiln cylinder body is driven by a driving device to rotate. This application is through setting up the indirect heating kiln barrel of electric heating wire in heating furnace body to but make the temperature accurate control in the kiln barrel at 1 ℃, and temperature distribution is even in the kiln barrel, improves and calcines the quality.
Description
Technical Field
The utility model relates to a rotary kiln technical field, concretely relates to rotary kiln is calcined to electric heat formula.
Background
Rotary calcining kilns are commonly used for the high temperature calcination of powdery or small-particle materials in the chemical or metallurgical industry for the extraction and recovery of usable, valuable materials. The existing calcining rotary kiln generally comprises a rotary kiln body, the kiln body is directly heated by gas or an electric heating wire to reach the calcining temperature, the temperature control precision is low, the temperature distribution in the kiln body is not uniform, and the calcining quality is influenced; and the existing calcining rotary kiln structure has the advantages of easy heat loss and high energy consumption.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an electric heating type calcining rotary kiln.
The utility model adopts the technical proposal that:
an electric heating type calcining rotary kiln comprises a kiln barrel, wherein the kiln barrel is rotatably and axially arranged in a furnace chamber of a heating furnace body, a heating cavity is arranged between the kiln barrel and the heating furnace body, and a plurality of spiral electric heating wires are arranged in the furnace chamber at the bottom of the kiln barrel; the kiln comprises a kiln barrel body, a heating furnace body, a feeding box, a discharging box, a front roller ring, a rear roller ring, a front supporting wheel, a rear supporting wheel, a fixed frame, a hydraulic oil cylinder and a piston rod, wherein two ends of the kiln barrel body extend out of the heating furnace body, the front end of the kiln barrel body is connected with the feeding box, the rear end of the kiln barrel body is connected with the discharging box, two ends of the kiln barrel body, which extend out of the heating furnace body, are fixedly connected with the front roller ring and the rear roller ring respectively, two sides of the bottom end of the front roller ring and the rear roller ring are respectively provided with the front supporting wheel and the rear supporting wheel, the front supporting wheel and the rear supporting wheel are rotatably arranged on a movable frame, the bottom of the movable frame is provided with the fixed frame, one end of the fixed frame, which is close to the discharging box, is hinged with the outer wall of the heating furnace body, two sides of the other end of the fixed frame are provided with the hydraulic oil cylinder, and the piston rod is hinged with the outer wall of the heating furnace body; the kiln cylinder body is driven to rotate by the driving device.
Further, still include feed arrangement, feed arrangement includes screw conveyer and feeder hopper, and the feeder hopper setting is in screw conveyer's top and its feed inlet and screw conveyer's feed inlet fixed connection, and screw conveyer sets up on portable support, and its discharge end passes the feed box and stretches into in the kiln barrel.
Furthermore, a front end cover is arranged at the front end of the kiln cylinder body, the kiln cylinder body is communicated with the feeding box through a central hole formed in the front end cover, a feeding pipe is arranged at the position, corresponding to the central hole of the kiln cylinder body, of the front end of the feeding box, and the discharging end of the spiral conveyor penetrates through the feeding pipe and the central hole and extends into the kiln cylinder body.
Furthermore, the driving device comprises a motor and a speed reducer, the motor and the speed reducer are fixedly mounted on the movable frame, an output shaft of the speed reducer is fixedly connected with a driving chain wheel, a driven chain wheel is fixedly sleeved on the front side of the front rolling ring of the kiln cylinder body, and the driven chain wheel is in transmission connection with the driving chain wheel through a chain.
Further, an exhaust gas pipeline is arranged at the upper part of the feeding box.
Furthermore, a first temperature measuring element is arranged in the kiln cylinder body, and a second temperature measuring element is arranged in the heating furnace body.
Furthermore, a plurality of material turning plates are welded on the inner side wall of the kiln cylinder.
The utility model has the advantages that: this application sets up the kiln barrel in heating furnace body, through setting up the indirect heating kiln barrel of heliciform electric heating wire in heating furnace body to make the temperature in the kiln barrel can accurate control at 1 ℃, and temperature distribution is even in the kiln barrel, improves and calcines the quality. The furnace lining is arranged on the heating furnace body, so that the heat preservation effect of the kiln cylinder body can be effectively improved, the heat loss is reduced, and the energy consumption is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an electrothermal calcining rotary kiln of the present invention.
Fig. 2 isbase:Sub>A half sectional view taken alongbase:Sub>A-base:Sub>A of fig. 1.
Fig. 3 is a half sectional view taken along B-B of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and a preferred embodiment.
Referring to fig. 1 to 3, the present embodiment provides an electric heating type calcining rotary kiln, which includes a screw conveyor 1, a feeding hopper 2, a feeding box 3, a driving device 4, a front tug 5, a heating furnace body 6, a kiln cylinder body 7, a discharging box 10, a rear riding wheel 11, a hydraulic cylinder 13, a movable frame 120 and a fixed frame 110.
The fixing frame 110 is used for fixedly supporting the heating furnace body 6. The movable frame 120 is disposed above the fixed frame 110, and is used for mounting the heating furnace body 6, the kiln cylinder 7 and the driving device 4.
The heating furnace body 6 comprises a furnace shell formed by integrally welding profile steel and steel plates, the furnace shell is fixedly arranged on the movable frame 120, rear support lugs are arranged on two sides of the rear end of the furnace shell, and the rear support lugs are rotatably connected with the fixed frame 110 through hinge pieces 51; front support lugs are arranged on two sides of the front end of the furnace shell, the front support lugs are hinged with a piston rod of a hydraulic oil cylinder 13, and a cylinder seat of the hydraulic oil cylinder 13 is hinged on the fixed frame 110.
The inner side of the furnace shell of the heating furnace body 6 is provided with furnace linings which enclose a furnace chamber with a semicircular upper part and a rectangular lower part. The furnace lining is composed of a heat insulation layer, a high-temperature resistant fiber cotton layer and a high-temperature resistant coating layer, the high-temperature resistant fiber cotton is folded into a module, an SUS304 stainless steel anchor is fixed on the furnace casing, a high-purity needled fiber blanket is used as the heat insulation layer and laid on the outer layer of the high-temperature resistant fiber cotton layer, and the thickness of the high-purity needled fiber blanket is 300mm. After the lining body is manufactured, high-temperature paint is sprayed on the inner surface of the high-temperature-resistant fiber cotton layer, so that the surface strength of the lining body is increased, the lining body is wind-resistant, the falling caused by hot air flow scouring is avoided, meanwhile, heat is prevented from entering the lining body, and good heat insulation and energy saving effects are achieved. The furnace lining structure has the characteristics of light weight, low heat storage, good heat preservation performance, high efficiency, energy conservation and the like.
The bottom of the furnace chamber of furnace body 6 is equipped with a plurality of electric heating wire 8, 8 spiral winding of electric heating wire are on high strength corundum bushing pipe, and a plurality of electric heating wire 8 is along furnace body length direction align to grid, and transversely passes stove outer covering, furnace lining from a lateral wall of furnace body 6, stretches into the furnace chamber, heats the furnace chamber, rethread furnace chamber heating kiln barrel 7. Therefore, the temperature distribution in the kiln cylinder body 7 is more uniform, the control is more accurate, and the calcining quality is higher.
The heating furnace body 6 can be divided into a plurality of heating zones along the length direction, a thermocouple 9 is arranged in each heating zone, the thermocouple can be connected with a control system, and PID adjustment control of the furnace temperature is realized through the control system. The thermocouple 9 can adopt Japan Fuji PXR9 series to control the temperature, and the temperature control precision is +/-1 ℃.
The kiln cylinder body 7 is rotatably and axially arranged in the furnace chamber of the heating furnace body 6, and the central axis of the kiln cylinder body is superposed with the central axis of the semicircular furnace chamber. Two ends of the kiln cylinder body 7 respectively extend out of the front end plate and the rear end plate of the heating furnace body 6 in a rotatable mode to be connected with the feeding box 3 and the discharging box 10, and the kiln cylinder body 7 is rotatably supported on the front tug 5 and the rear riding wheel 11 through the front rolling ring and the rear rolling ring 12. The front tug 5 and the rear riding wheel 11 are both arranged on the movable frame 120 through the support in a rotating way.
The kiln cylinder body 7 is in a long cylindrical shape, and in specific implementation, the kiln cylinder body 7 can be formed by continuously welding stainless steel plates with certain thicknesses after being circled. The inner circumferential side wall of the kiln cylinder 7 is provided with a plurality of material turning plates 71, the material turning plates 71 are welded along the inner circumference of the kiln cylinder 7 in a plurality of equal parts, and form an included angle of about 30 degrees with the cylinder and fold edges in the direction opposite to the rotation direction of the kiln cylinder 7 during welding. The material stirring plate 71 is arranged to fully stir the materials in the kiln, so that the materials on the upper layer and the lower layer can be heated alternately, the materials are heated uniformly and fully calcined, and the damage rate of the materials in the calcining process can be effectively reduced. The kiln cylinder body 7 is internally provided with a temperature measuring galvanic couple 15, and the temperature measuring galvanic couple 15 is axially inserted into the kiln cylinder body from the discharge end of the kiln cylinder body and is used for detecting the calcining temperature in the kiln cylinder body. The temperature measuring couple 15 can be connected with a control system, and PID regulation control of the temperature in the kiln cylinder body is realized through the control system. The temperature measuring couple 15 can adopt a Japan Fuji PXR9 series for temperature control, and the temperature control precision is +/-1 ℃.
The kiln cylinder body 7 is driven to rotate by the driving device 4, and in specific implementation, the driving device 4 can select a variable frequency motor and a cycloidal pin gear speed reducer, and the speed is regulated by a variable frequency speed regulator. The variable frequency motor and the cycloidal pin gear speed reducer are fixedly arranged on the movable frame 120, an output shaft of the speed reducer is fixedly connected with a driving chain wheel, a kiln cylinder body 7 is fixedly sleeved with a driven chain wheel, and the driven chain wheel is in transmission connection with the driving chain wheel through a chain. The variable frequency motor drives the kiln cylinder body 7 to rotate on the front tug 5 and the rear riding wheel 11 through the cycloidal pin gear speed reducer.
The front end of the kiln cylinder body 7 is provided with a front end cover, the kiln cylinder body 7 is communicated with the feeding box 3 through a central hole formed in the front end cover, and the front end of the feeding box 3 is provided with a feeding pipe corresponding to the position of the central hole of the kiln cylinder body 7. An exhaust gas pipeline 31 is arranged at the upper part of the feeding box 3, and a detection instrument for detecting the exhaust gas temperature can be arranged in the exhaust gas pipeline 31. The uncovered intercommunication of rear end of kiln barrel 7 goes out workbin 10, and the hypomere of going out workbin 10 is the toper, and the toper bottom sets up the discharge gate, sets up the bleeder valve on the discharge gate.
The spiral conveyor 1 and the feed hopper 2 form a feeding device, the spiral conveyor 1 is arranged on the movable support, and the discharge end of the spiral conveyor passes through the feeding pipe of the feeding box 3 and the central hole of the end cover of the kiln cylinder body and extends into the kiln cylinder body 7; feed hopper 2 sets up in screw conveyer 1's top, and the feed opening of feed hopper 2 and screw conveyer 1's feed inlet fixed connection.
The feeding of the screw conveyor 1 is continuous and uniform, the feeding port is connected with the feeding box of the kiln barrel in an inserting manner, the screw conveyor 1 is moved out after the feeding is finished, and the inlet of the feeding pipe is sealed by a cover plate. The feed opening play of loading hopper 2 can set up 1 detachable screen cloth, prevents that large granule material or impurity from getting into screw conveyer.
The utility model discloses during the use:
when feeding, the piston rod of the hydraulic oil cylinder 13 retracts, the kiln cylinder body 7 is in a horizontal state, the screw conveyer 1 moves to the front side of the kiln cylinder body through the movable support, the discharge end of the screw conveyer 1 penetrates through the feeding pipe of the feeding box 3 and the central hole of the end cover of the kiln cylinder body to extend into the kiln cylinder body 7, and feeding is carried out in the kiln cylinder body 7 through the feeding hopper 2; and after the feeding is finished, the feeding pipe is moved out, and the inlet of the feeding pipe is closed by a cover plate. Starting the driving device 4 to drive the kiln cylinder 7 to horizontally rotate;
adjusting the temperature in the kiln cylinder body according to the process requirement for calcination;
after the calcination is finished, the piston rod of the hydraulic oil cylinder 13 extends out to drive the heating furnace body 6 to rotate around the hinge piece 51, and the kiln cylinder body 7 inclines and rotates reversely to pour out the calcined material through the discharge hole of the discharge box 10.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and the improvements and modifications are also within the protection scope of the present invention.
Claims (7)
1. An electrothermal calcining rotary kiln comprises a kiln cylinder body (7), and is characterized in that: the kiln cylinder body (7) is rotatably and axially arranged in a furnace chamber of the heating furnace body (6), a heating cavity is arranged between the kiln cylinder body and the heating furnace body (6), and a plurality of spiral electric heating wires (8) are arranged in the furnace chamber at the bottom of the kiln cylinder body (7); two ends of a kiln cylinder body (7) extend out of a heating furnace body, the front end of the kiln cylinder body is connected with a feeding box (3), the rear end of the kiln cylinder body is connected with a discharging box (10), two ends of the kiln cylinder body (7) extending out of the heating furnace body are respectively and fixedly connected with a front rolling ring and a rear rolling ring, two sides of the bottom end of each of the front rolling ring and the rear rolling ring are respectively provided with a front tug (5) and a rear riding wheel (11), the front tug (5) and the rear riding wheel (11) are both rotatably arranged on a movable frame (120), the bottom of the movable frame (120) is provided with a fixed frame (110), one end of the fixed frame (110), close to the discharging box (10), is hinged with the outer wall of the heating furnace body (6), two sides of the other end of the fixed frame (110) are provided with hydraulic cylinders (13), and piston rods of the hydraulic cylinders (13) are hinged with the outer wall of the heating furnace body (6); the kiln cylinder body (7) is driven to rotate by the driving device (4).
2. The electrothermal calcination rotary kiln according to claim 1, wherein: still include feed arrangement, feed arrangement includes screw conveyer (1) and feeder hopper (2), and feeder hopper (2) set up in screw conveyer's (1) top and its feed inlet fixed connection of feed opening and screw conveyer (1), and screw conveyer (1) sets up on portable support, and its discharge end passes feed box (3) and stretches into in kiln barrel (7).
3. An electrothermal calcination rotary kiln according to claim 2, wherein: the front end of the kiln cylinder body (7) is provided with a front end cover, the kiln cylinder body (7) is communicated with the feeding box (3) through a central hole formed in the front end cover, the front end of the feeding box (3) is provided with a feeding pipe at a position corresponding to the central hole of the kiln cylinder body (7), and the discharging end of the screw conveyor (1) penetrates through the feeding pipe and the central hole to extend into the kiln cylinder body (7).
4. An electrothermal calcination rotary kiln according to claim 1 or 2, wherein: the driving device (4) comprises a motor and a speed reducer, the motor and the speed reducer are fixedly mounted on the movable frame (120), an output shaft of the speed reducer is fixedly connected with a driving chain wheel, a driven chain wheel is fixedly sleeved on the front side of a front rolling ring of the kiln barrel body (7), and the driven chain wheel is in transmission connection with the driving chain wheel through a chain.
5. An electrothermal calcination rotary kiln according to claim 1 or 2, wherein: and an exhaust gas pipeline (31) is arranged at the upper part of the feeding box (3).
6. An electrothermal calcination rotary kiln according to claim 1 or 2, wherein: a first temperature measuring element (15) is arranged in the kiln cylinder body (7), and a second temperature measuring element (9) is arranged in the heating furnace body (6).
7. An electrothermal calcination rotary kiln according to claim 1 or 2, wherein: a plurality of material turning plates (71) are welded on the inner side wall of the kiln cylinder body (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221468226.0U CN217844673U (en) | 2022-06-13 | 2022-06-13 | Electric heating type calcining rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221468226.0U CN217844673U (en) | 2022-06-13 | 2022-06-13 | Electric heating type calcining rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217844673U true CN217844673U (en) | 2022-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221468226.0U Active CN217844673U (en) | 2022-06-13 | 2022-06-13 | Electric heating type calcining rotary kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217844673U (en) |
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2022
- 2022-06-13 CN CN202221468226.0U patent/CN217844673U/en active Active
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