Heat accumulating type rotary furnace

Abstract

The utility model discloses a heat accumulating type rotary furnace which comprises a rotary furnace body and a heat accumulating mechanism, the left end of the rotary furnace body is rotationally connected with a rotary furnace tail through a first bearing, the right end of the rotary furnace body is rotationally connected with a rotary furnace head through a second bearing, an inner lining plate is arranged on the inner arc face of the rotary furnace body, the rotary furnace body gradually inclines downwards from left to right, and a burner is arranged at the upper end of the rotary furnace head. A shell is arranged between the rotary furnace tail and the rotary furnace head, the rotary furnace body is located in the shell, and a PLC is arranged on the front surface of the rotary furnace head. According to the heat storage type rotary furnace, heat of the rotary furnace is recycled in a heat storage mode, the circulating heat can be conveniently called at any time, the heat energy utilization efficiency of the rotary furnace is improved, and the heat storage type rotary furnace saves energy and is environmentally friendly; and the flowing track of the flue gas in the heat storage part is guided, so that the heat storage body absorbs heat in the flue gas more sufficiently, and the heat storage effect of the heat storage body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary furnaces, in particular to a regenerative rotary furnace. Background Art

[0002] A rotary kiln is a thermal equipment for calcining, roasting or drying granular and powdered materials. It has the advantages of a combustion system, strong technical power, precise gas distribution, and a low burnout rate. It is mainly used to calcine cement clinker in the cement industry, and is also used to calcine granular and powdered materials in the refractory and ceramic industries and to dry various raw materials in the above industries. It is widely used in the chemical industry for drying, dehydrating and roasting materials. In the prior art, in order to save the energy consumption of the rotary kiln, a heat exchange method is often used to recycle the heat in the exhaust gas of the rotary kiln to preheat the combustion-supporting gas required for the operation of the rotary kiln. However, the heat exchange method directly uses the circulating heat, which is not convenient for calling the circulating heat at any time, and the heat utilization efficiency is low. Even if some rotary kilns use a heat storage method to recycle the heat and can call the circulating heat at any time, the flow trajectory of the rotary kiln flue gas is changeable, and it is easy for the flue gas to be insufficiently in contact with the heat storage body, affecting the heat storage effect of the rotary kiln. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a heat storage type rotary kiln, which recycles the heat of the rotary kiln by means of heat storage, facilitates the use of the circulating heat at any time, improves the thermal energy utilization efficiency of the rotary kiln, guides the flow trajectory of the flue gas inside the heat storage component, enables the heat storage body to more fully absorb the heat in the flue gas, improves the heat storage effect of the heat storage body, and can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a regenerative rotary kiln, comprising a rotary kiln body and a regenerative mechanism;

[0005] Rotary kiln body: the left end of the rotary kiln body is rotatably connected to the rotary kiln tail through bearing 1, the right end of the rotary kiln body is rotatably connected to the rotary kiln head through bearing 2, the inner arc surface of the rotary kiln body is provided with an inner lining plate, the rotary kiln body gradually tilts downward from left to right, a burner is provided at the upper end of the rotary kiln head, a shell is provided between the rotary kiln tail and the rotary kiln head, the rotary kiln body is located inside the shell, a PLC controller is provided on the front surface of the rotary kiln head, the input end of the PLC controller is electrically connected to an external power supply, and the input end of the burner is electrically connected to the output end of the PLC controller;

[0006] Heat storage mechanism: It is respectively arranged on the front and rear sides of the shell. The right end of the heat storage mechanism is connected with the air inlet of the burner. The heat of the rotary kiln is recycled by heat storage, which is convenient for calling the circulating heat at any time, improving the thermal energy utilization efficiency of the rotary kiln, saving energy and protecting the environment, guiding the flow trajectory of the flue gas inside the heat storage component, so that the heat storage body can more fully absorb the heat in the flue gas and improve the heat storage effect of the heat storage body.

[0007] Furthermore, the heat storage mechanism includes a heat storage shell, a solenoid valve and a ceramic heat storage body. The heat storage shell is respectively arranged on the front and rear sides of the shell. The hot air inlet pipe of the heat storage shell is connected to the air outlet at the tail of the rotary furnace, and the cold air outlet pipe of the heat storage shell is connected to the air inlet of the burner. The middle part of the hot and cold air inlet and outlet pipes of the heat storage shell is connected in series with a solenoid valve, and ceramic heat storage bodies are placed inside the heat storage shell. The input ends of the solenoid valves are electrically connected to the output ends of the PLC controller, so as to facilitate the call of the circulating heat at any time.

[0008] Furthermore, the heat storage mechanism also includes a guide plate, which is respectively arranged at the upper and lower ends of the heat storage shell to guide the flow trajectory of the gas inside the heat storage shell.

[0009] Furthermore, the heat storage mechanism also includes a temperature sensor, which is arranged at the right end of the interior of the heat storage shell, the detection end of the temperature sensor is in contact with the rightmost ceramic heat storage body, and the output end of the temperature sensor is electrically connected to the input end of the PLC controller to detect the temperature of the rightmost ceramic heat storage body.

[0010] Furthermore, the heat storage mechanism also includes an electric fan, which is respectively arranged at the right end of the heat storage shell, and the electric fan is located between two adjacent guide plates. The input end of the electric fan is electrically connected to the output end of the PLC controller to provide power for the flow of air.

[0011] Furthermore, the outer arc surfaces of the rotary kiln body are respectively provided with external gear rings, and motors are respectively provided inside the outer shells. Gears are provided at the ends of the output shafts of the motors, and the gears are meshed and connected with adjacent external gear rings. The input end of the motor is electrically connected to the output end of the PLC controller to provide power for the rotation of the rotary kiln body.

[0012] Furthermore, the inner sides of the outer shell and the heat storage shell are paved with polyurethane insulation boards to reduce heat loss.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the regenerative rotary furnace has the following advantages:

[0014] When in use, the motor is started by the PLC controller to rotate the rotary kiln body. Since the rotary kiln body is in an inclined state, the material inside the rotary kiln body gradually moves to the right during the rotation, and the burner is started at the same time to calcine the material in the moving process. During the calcination process, the electric fan is started to allow the flue gas generated by the calcination to enter the heat storage shell. Under the guidance of the guide plate, the flue gas is evenly contacted with the ceramic heat storage body along a serpentine trajectory to absorb the heat in the flue gas. The solenoid valve is controlled to open and close by the PLC controller to change the heat storage position of the flue gas. At the same time, the combustion-supporting gas is guided to contact with the ceramic heat storage body along the serpentine trajectory to absorb the heat inside the ceramic heat storage body, and the combustion-supporting gas required for the burner to work is preheated. The heat of the rotary kiln is recycled by means of heat storage, which is convenient for calling the circulating heat at any time, thereby improving the thermal energy utilization efficiency of the rotary kiln, saving energy and protecting the environment, and guiding the flow trajectory of the flue gas inside the heat storage component so that the heat storage body can more fully absorb the heat in the flue gas, thereby improving the heat storage effect of the heat storage body. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the front view cross section of the overall device of the utility model;

[0017] Figure 3 It is a schematic structural diagram of a side cross-section of the overall device of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the front view section of the heat storage mechanism of the utility model.

[0019] In the figure: 1 rotary furnace tail, 2 rotary furnace head, 3 rotary furnace body, 4 inner lining plate, 5 burner, 6 outer shell, 7 outer gear ring, 8 motor, 9 heat storage mechanism, 91 heat storage shell, 92 solenoid valve, 93 ceramic heat storage body, 94 guide plate, 95 temperature sensor, 96 electric fan, 10 PLC controller, 11 gear. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 , This embodiment provides a technical solution: a regenerative rotary kiln, comprising a rotary kiln body 3 and a regenerative mechanism 9;

[0022] Rotary kiln body 3: The left end of the rotary kiln body 3 is rotatably connected to the rotary kiln tail 1 through bearing 1, and the right end of the rotary kiln body 3 is rotatably connected to the rotary kiln head 2 through bearing 2, providing rotation support for the left and right ends of the rotary kiln body 3, so as to facilitate the materials to enter and leave the rotary kiln body 3. The inner arc surface of the rotary kiln body 3 is provided with an inner lining plate 4, and the inner lining plate 4 is a refractory brick plate. The rotary kiln body 3 gradually tilts downward from left to right. When the rotary kiln body 3 rotates, since the rotary kiln body 3 is in an inclined state, the materials inside the rotary kiln body 3 gradually move to the right during the rotation. A burner 5 is provided at the upper end of the rotary kiln head 2, and the burner 5 sprays fuel into the rotary kiln body 3 and burns it. The smoke generated by the combustion flows upward along the inside of the rotary kiln body 3 to calcine the materials in the moving process. A shell 6 is provided between the kiln head 2 to hide and protect the rotary kiln body 3. The rotary kiln body 3 is located inside the shell 6. A PLC controller 10 is provided on the front surface of the rotary kiln head 2 to control the start and stop of the entire device. The input end of the PLC controller 10 is electrically connected to an external power supply, and the input end of the burner 5 is electrically connected to the output end of the PLC controller 10. The outer arc surface of the rotary kiln body 3 is respectively provided with an outer gear ring 7. Motors 8 are respectively provided inside the shell 6. Gears 11 are provided at the ends of the output shafts of the motors 8. The gears 11 are meshed and connected with the adjacent outer gear rings 7. The input end of the motor 8 is electrically connected to the output end of the PLC controller 10. The motor 8 is started, and the output shaft of the motor 8 drives the gear 11 to rotate. Through the meshing connection between the gear 11 and the outer gear ring 7, the outer gear ring 7 drives the rotary kiln body 3 to rotate.

[0023] Heat storage mechanism 9: respectively arranged on the front and rear sides of the shell 6, the right end of the heat storage mechanism 9 is connected to the air inlet of the burner 5, the heat storage mechanism 9 includes a heat storage shell 91, a solenoid valve 92 and a ceramic heat storage body 93, the heat storage shell 91 is respectively arranged on the front and rear sides of the shell 6, the hot air inlet pipe of the heat storage shell 91 is connected to the air outlet of the rotary kiln tail 1, the cold air outlet pipe of the heat storage shell 91 is connected to the air inlet of the burner 5, and the middle part of the hot and cold air inlet and outlet pipes of the heat storage shell 91 is connected in series with a solenoid valve 92 , ceramic heat storage bodies 93 are placed inside the heat storage shell 91, and the input ends of the solenoid valve 92 are electrically connected to the output ends of the PLC controller 10. The PLC controller 10 controls the solenoid valve 92 to open and close, so that the flue gas enters the heat storage shell 91 for heat storage, and the combustion-supporting gas enters another heat storage shell 91 after heat storage is completed to absorb heat. The heat storage mechanism 9 also includes a guide plate 94, which is respectively arranged at the upper and lower ends of the heat storage shell 91 to guide the flue gas and the combustion-supporting gas in the heat storage shell The inside of the body 91 flows along a serpentine trajectory, so that the flue gas and the combustion-supporting gas are in uniform contact with the ceramic heat storage body 93. The heat storage mechanism 9 also includes a temperature sensor 95, which is arranged at the right end of the heat storage shell 91. The detection end of the temperature sensor 95 is in contact with the ceramic heat storage body 93 on the far right. The output end of the temperature sensor 95 is electrically connected to the input end of the PLC controller 10. The temperature of the ceramic heat storage body 93 on the far right is detected by the temperature sensor 95. Because the ceramic heat storage body 93 on the far right is in contact with the flue gas last, the overall heat storage degree is judged by the temperature of the ceramic heat storage body 93 on the far right. The heat storage mechanism 9 also includes an electric fan 96, which is respectively arranged at the right end of the heat storage shell 91, and the electric fan 96 is located between two adjacent guide plates 94. The input end of the electric fan 96 is electrically connected to the output end of the PLC controller 10 to provide power for the flow of flue gas and combustion-supporting air. The inner side surfaces of the outer shell 6 and the heat storage shell 91 are paved with polyurethane insulation boards to reduce heat loss.

[0024] The working principle of a heat storage rotary kiln provided by the utility model is as follows: when in use, the material is poured into the rotary kiln body 3 through the feed port of the rotary kiln tail 1, the motor 8 is started through the PLC controller 10, and the output shaft of the motor 8 drives the gear 11 to rotate, and the outer gear ring 7 is connected through the meshing connection of the gear 11 and the outer gear ring 7, so that the outer gear ring 7 drives the rotary kiln body 3 to rotate. Since the rotary kiln body 3 is in an inclined state, during the rotation process, the material inside the rotary kiln body 3 gradually moves to the right, and is finally discharged from the discharge port of the rotary kiln head 2, and the burner 5 is started at the same time, and the burner 5 sprays fuel into the rotary kiln body 3 and burns it. The smoke generated by the combustion flows upward along the inside of the rotary kiln body 3 to calcine the material in the moving process. During the calcination process, the electric fan 96 is started to provide power for the flow of air, so that the smoke flowing out of the rotary kiln tail 1 enters the heat storage Inside the shell 91, under the guidance of the guide plate 94, the flue gas flows along a serpentine trajectory inside the heat storage shell 91, and evenly contacts the ceramic heat storage body 93. The ceramic heat storage body 93 absorbs the heat in the flue gas, and the temperature of the rightmost ceramic heat storage body 93 is detected by the temperature sensor 95. Because the rightmost ceramic heat storage body 93 is the last to contact the flue gas, the overall heat storage degree is judged by the temperature of the rightmost ceramic heat storage body 93. After reaching the set temperature, the PLC controller 10 is used to control the opening and closing of the solenoid valve 92, so that the flue gas enters another heat storage shell 91 for heat storage. After the current heat storage is completed, the combustion-supporting gas is introduced into the heat storage shell 91, and the combustion-supporting gas also flows along a serpentine trajectory inside the heat storage shell 91 to absorb the heat inside the ceramic heat storage body 93. The combustion-supporting gas after absorbing heat enters the burner 5 to recycle the heat.

[0025] It is worth noting that the PLC controller 10 disclosed in the above embodiment can use the NX7 model PLC controller, and the burner 5, the solenoid valve 92, the temperature sensor 95, the motor 8 and the electric fan 96 can be freely configured according to the actual application scenario. The burner 5 can use the 40FS20 model burner, the solenoid valve 92 can use the ZCG model high-temperature solenoid valve, the temperature sensor 95 can use the IMG-5449 model temperature sensor, the motor 8 can use the 42BYHJ01 model stepping reduction motor, and the electric fan 96 can use the 6028 model guide fan. The PLC controller 10 controls the burner 5, the solenoid valve 92, the temperature sensor 95, the motor 8 and the electric fan 96 using methods commonly used in the prior art.

[0026] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A regenerative rotary kiln, characterized in that: It comprises a rotary kiln body (3) and a heat storage mechanism (9); A rotary kiln body (3): the left end of the rotary kiln body (3) is rotatably connected to a rotary kiln tail (1) via a first bearing, the right end of the rotary kiln body (3) is rotatably connected to a rotary kiln head (2) via a second bearing, an inner lining plate (4) is provided on the inner arc surface of the rotary kiln body (3), the rotary kiln body (3) gradually tilts downward from left to right, a burner (5) is provided at the upper end of the rotary kiln head (2), a housing (6) is provided between the rotary kiln tail (1) and the rotary kiln head (2), the rotary kiln body (3) is located inside the housing (6), a PLC controller (10) is provided on the front surface of the rotary kiln head (2), the input end of the PLC controller (10) is electrically connected to an external power supply, and the input end of the burner (5) is electrically connected to the output end of the PLC controller (10); The heat storage mechanism (9) is respectively arranged on the front and rear sides of the housing (6); the right end of the heat storage mechanism (9) is connected to the air inlet of the burner (5).

2. A regenerative rotary kiln according to claim 1, characterized in that: The heat storage mechanism (9) comprises a heat storage shell (91), a solenoid valve (92) and a ceramic heat storage body (93). The heat storage shell (91) is respectively arranged on the front and rear sides of the outer shell (6). The hot air inlet pipe of the heat storage shell (91) is connected to the air outlet of the rotary kiln tail (1). The cold air outlet pipe of the heat storage shell (91) is connected to the air inlet of the burner (5). The middle part of the hot and cold air inlet and outlet pipes of the heat storage shell (91) is connected in series with a solenoid valve (92). The ceramic heat storage body (93) is respectively placed inside the heat storage shell (91). The input end of the solenoid valve (92) is electrically connected to the output end of the PLC controller (10).

3. A regenerative rotary kiln according to claim 2, characterized in that: The heat storage mechanism (9) further comprises a guide plate (94), wherein the guide plate (94) is respectively arranged at the upper and lower ends of the heat storage shell (91).

4. A regenerative rotary kiln according to claim 2, characterized in that: The heat storage mechanism (9) further comprises a temperature sensor (95), wherein the temperature sensor (95) is arranged at the right end inside the heat storage housing (91), a detection end of the temperature sensor (95) is in contact with the rightmost ceramic heat storage body (93), and an output end of the temperature sensor (95) is electrically connected to an input end of the PLC controller (10).

5. The regenerative rotary kiln according to claim 3, characterized in that: The heat storage mechanism (9) further comprises an electric fan (96), which is respectively arranged at the right end of the heat storage housing (91), the electric fan (96) is located between two adjacent guide plates (94), and the input end of the electric fan (96) is electrically connected to the output end of the PLC controller (10).

6. The regenerative rotary kiln according to claim 1, characterized in that: The outer arc surface of the rotary kiln body (3) is respectively provided with an outer gear ring (7), the inside of the outer shell (6) is respectively provided with a motor (8), the end of the output shaft of the motor (8) is provided with a gear (11), the gear (11) is meshedly connected with the adjacent outer gear ring (7), and the input end of the motor (8) is electrically connected to the output end of the PLC controller (10).

7. The regenerative rotary kiln according to claim 2, characterized in that: The inner side surfaces of the outer shell (6) and the heat storage shell (91) are both paved with polyurethane heat insulation boards.

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