Double-hearth lime kiln for alternately calcining premixed combustion airflow

Abstract

The utility model relates to the technical field of double-chamber lime kilns, and discloses a double-chamber lime kiln capable of alternately calcining premixed combustion airflow, which comprises a first kiln body and a second kiln body, a shell is fixedly sleeved outside the first kiln body and the second kiln body, and a heat insulation interlayer is formed between the outer walls of the first kiln body and the second kiln body and the inner wall of the shell. A three-way pipe is erected above the first kiln body and the second kiln body in a suspended mode, the two ends of the three-way pipe communicate with the interiors of the first kiln body and the second kiln body through first communicating assemblies, and the other end of the three-way pipe communicates with the heat preservation interlayer through a second communicating assembly. According to the utility model, high-temperature waste gas generated by calcining in one hearth can enter the heat-insulating interlayer after preheating limestone in the other hearth, so that the heat-insulating interlayer has a certain temperature, and the outer wall of the kiln body can be separated from external air by the heat-insulating interlayer, so that the kiln body is prevented from being in direct contact with the external air; therefore, a good heat preservation effect on the interior of the kiln body is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of double-chamber lime kilns, specifically a double-chamber lime kiln with alternating premixed combustion airflow for calcination. Background Technology

[0002] The double-chamber lime kiln with alternating premixed combustion airflow is a highly efficient and energy-saving lime production equipment, widely used in the production of industrial and building lime. It employs premixed combustion, ensuring thorough mixing of fuel and air for more complete combustion, concentrated heat release, and high utilization. Simultaneously, the double-chamber structure allows for efficient heat recovery and utilization; for example, the high-temperature exhaust gas generated in one chamber can preheat the limestone in the other chamber, reducing energy consumption.

[0003] However, the outer wall of existing double-chamber lime kilns is in direct contact with the air, making it easy for heat to escape. Moreover, the high-temperature exhaust gas generated by calcination in one chamber is directly discharged after preheating the limestone in the other chamber, resulting in insufficient heat utilization. To address this, a double-chamber lime kiln with alternating premixed combustion airflow for calcination is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a double-chamber lime kiln with alternating premixed combustion airflow for calcination, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-chamber lime kiln with alternating premixed combustion airflow, comprising a No. 1 kiln body and a No. 2 kiln body. Both the No. 1 and No. 2 kiln bodies have feed inlets at their upper ends. An outer shell is fixedly fitted around the No. 1 and No. 2 kiln bodies. A heat-insulating interlayer is formed between the outer wall of the No. 1 and No. 2 kiln bodies and the inner wall of the outer shell. A three-way pipe is suspended above the No. 1 and No. 2 kiln bodies. Both ends of the three-way pipe are connected to the interior of the No. 1 and No. 2 kiln bodies through a first connecting component, and the other end of the three-way pipe is connected to the heat-insulating interlayer through a second connecting component.

[0006] As a further preferred embodiment of this technical solution, the No. 1 kiln body and the No. 2 kiln body are connected by a connecting pipe.

[0007] As a further preferred embodiment of this technical solution, the first connecting component includes a connector and an externally threaded connecting cylinder. The upper end of the connector is rotatably connected to one end of a tee pipe via a rotating component. The bottom of the connector is fixedly connected to an externally threaded connecting cylinder. An internal thread is provided on the inner wall of the feed inlet. The outer wall of the externally threaded connecting cylinder is threadedly engaged with the internal thread.

[0008] As a further preferred embodiment of this technical solution, the rotating assembly includes an annular plate, which is fixedly sleeved on the outer wall of one end of the tee pipe. A through hole adapted to the end of the tee pipe is opened at the axial center of the connector, and an annular groove adapted to the annular plate is opened on the inner wall of the through hole.

[0009] As a further preferred embodiment of this technical solution, the second connecting component consists of a folded tube and an air inlet pipe. The folded tube is fixedly connected to the end of the three-way pipe, and the other end of the folded tube is fixedly connected to the air inlet pipe. The other end of the air inlet pipe is fixedly connected to the bottom of the outer shell and is in communication with the insulation layer.

[0010] As a further preferred embodiment of this technical solution, an exhaust pipe is fixedly connected to the upper end of the outer shell, the exhaust pipe is in communication with the insulation interlayer, and the other end of the exhaust pipe is connected to the waste gas treatment mechanism.

[0011] As a further preferred embodiment of this technical solution, the air intake pipe is fixed to the outer wall of the housing by multiple fixing plates, and the multiple fixing plates are arranged in a linear array.

[0012] This utility model provides a double-chamber lime kiln with alternating premixed combustion airflow for calcination, which has the following features:

[0013] Beneficial effects:

[0014] The high-temperature exhaust gas generated by the calcination in one chamber of this invention preheats the limestone in the other chamber, then enters the three-way pipe and flows along the folded pipe and the air inlet pipe into the insulation jacket. This gives the insulation jacket a certain temperature, and the insulation jacket can isolate the outer wall of the kiln from the outside air, preventing the kiln from directly contacting the outside air, thus providing a good insulation effect for the inside of the kiln. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a disassembled anatomical diagram of the overall structure of this utility model;

[0017] Figure 3 This utility model Figure 2 A schematic diagram of the structure of A in the middle;

[0018] Figure 4 This is a cross-sectional schematic diagram of the connector in this utility model;

[0019] In the diagram: 1. Kiln body No. 1; 2. Kiln body No. 2; 3. Connecting pipe; 4. Outer shell; 5. Insulation jacket; 6. T-pipe; 7. Folded pipe; 8. Air inlet pipe; 9. Fixing plate; 10. Connector; 11. Exhaust pipe; 12. Feed inlet; 13. Internal thread; 14. External thread connecting cylinder; 15. Annular plate; 16. Annular groove; 17. Through hole. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] This utility model provides a technical solution: such as Figures 1 to 4 As shown in this embodiment, a double-chamber lime kiln with alternating premixed combustion airflow includes a first kiln body 1 and a second kiln body 2. Both the first kiln body 1 and the second kiln body 2 have feed inlets 12 at their upper ends. The first kiln body 1 and the second kiln body 2 are connected by a connecting pipe 3. The first kiln body 1 and the second kiln body 2 are fixedly fitted with outer shells 4. A heat insulation layer 5 is formed between the outer wall of the first kiln body 1 and the second kiln body 2 and the inner wall of the outer shell 4. A three-way pipe 6 is suspended above the first kiln body 1 and the second kiln body 2. The two ends of the three-way pipe 6 are connected to the interior of the first kiln body 1 and the second kiln body 2 through a first connecting component, and the other end of the three-way pipe 6 is connected to the heat insulation layer 5 through a second connecting component.

[0022] The first connecting component includes a connector 10 and an external threaded connecting cylinder 14. The upper end of the connector 10 is rotatably connected to one end of the three-way pipe 6 through a rotating component. The bottom of the connector 10 is fixedly connected to the external threaded connecting cylinder 14. An internal thread 13 is provided on the inner wall of the feed port 12. The outer wall of the external threaded connecting cylinder 14 is threadedly engaged with the internal thread 13.

[0023] Rotating the connector 10 causes the external threaded connector 14 to rotate within the feed inlet 12, thus enabling the connection and disconnection of the end of the tee pipe 6 from the feed inlet 12.

[0024] The rotating assembly includes an annular plate 15, which is fixedly sleeved on the outer wall of one end of the three-way pipe 6. A through hole 17 adapted to the end of the three-way pipe 6 is opened at the axis of the connector 10. An annular groove 16 adapted to the annular plate 15 is opened on the inner wall of the through hole 17.

[0025] By adapting the annular groove 16 to the annular plate 15, the connector 10 can be rotatably connected to the end of the tee pipe 6.

[0026] The second connecting component consists of a folded tube 7 and an air inlet pipe 8. The folded tube 7 is fixedly connected to the end of the three-way pipe 6, and the other end of the folded tube 7 is fixedly connected to the air inlet pipe 8. The other end of the air inlet pipe 8 is fixedly connected to the bottom of the outer shell 4 and is in communication with the insulation layer 5.

[0027] The folded pipe 7 and the air inlet pipe 8 ensure that the gas in the three-way pipe 6 enters the insulation jacket 5. When feeding materials into the No. 1 kiln body 1 and the No. 2 kiln body 2, both ends of the three-way pipe 6 need to be removed from the No. 1 kiln body 1 and the No. 2 kiln body 2. The folded pipe 7 ensures that the removed three-way pipe 6 can be kept away from the feed inlet 12 of the No. 1 kiln body 1 and the No. 2 kiln body 2, so as to avoid the three-way pipe 6 from affecting the addition of materials.

[0028] The upper end of the outer shell 4 is fixedly connected to an exhaust pipe 11, which is in communication with the insulation layer 5. The other end of the exhaust pipe 11 is connected to a waste gas treatment mechanism (not shown in the figure, but any waste gas treatment mechanism available on the market can be used).

[0029] The intake pipe 8 is fixed to the outer wall of the outer casing 4 by multiple fixing plates 9, which are arranged in a linear array.

[0030] The intake pipe 8 can be fixed by the fixed plate 9 to prevent it from shaking.

[0031] This utility model provides a double-chamber lime kiln with alternating premixed combustion airflow for calcination. The specific working principle is as follows:

[0032] During use, the high-temperature exhaust gas generated by the calcination in one chamber preheats the limestone in the other chamber, then enters the three-way pipe 6 and flows along the folded pipe 7 and the air inlet pipe 8 into the insulation jacket 5, thereby giving the insulation jacket 5 a certain temperature. The insulation jacket 5 can isolate the outer wall of the kiln from the outside air, preventing the kiln from directly contacting the outside air, thus providing a good insulation effect for the inside of the kiln.

[0033] It should be noted that although the temperature of the hot smoke is lower than that inside the kiln, making the temperature of the insulation jacket 5 lower than that inside the kiln, heat inside the kiln will inevitably be transferred to the insulation jacket 5 under the action of heat transfer. However, compared with the kiln being in direct contact with the air, this measure can greatly alleviate the loss of heat inside the kiln.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double shaft lime kiln with alternating pre-mixed combustion gas firing, comprising a first kiln body (1) and a second kiln body (2), characterized in that: The upper end of the first kiln body (1) and the second kiln body (2) is provided with a feeding port (12), the outer part of the first kiln body (1) and the second kiln body (2) is fixedly provided with an outer shell (4), the outer wall of the first kiln body (1) and the second kiln body (2) and the inner wall of the outer shell (4) form a heat preservation interlayer (5), the upper part of the first kiln body (1) and the second kiln body (2) is provided with a tee pipe (6), the two ends of the tee pipe (6) are communicated with the inside of the first kiln body (1) and the second kiln body (2) through a first communication assembly, the other end of the tee pipe (6) is communicated with the heat preservation interlayer (5) through a second communication assembly.

2. A dual shaft lime kiln with pre-mixed combustion gas flow alternately calcining according to claim 1, characterized in that: The first kiln body (1) and the second kiln body (2) are communicated through a communication pipeline (3).

3. A dual shaft lime kiln with pre-mixed combustion gas flow alternately calcining according to claim 1, characterized in that: The first communication assembly comprises a connecting head (10) and an external thread connecting cylinder (14), the upper end of the connecting head (10) is rotatably connected with one end of the tee pipe (6) through a rotating assembly, the bottom of the connecting head (10) is fixedly connected with the external thread connecting cylinder (14), the inner wall of the feeding port (12) is provided with an internal thread (13), and the outer wall of the external thread connecting cylinder (14) is threadedly matched with the internal thread (13).

4. A dual shaft lime kiln with alternating firing of premixed combustion gases according to claim 3, characterized in that: The rotating assembly comprises an annular plate (15), the annular plate (15) is fixedly provided on the outer wall of one end of the tee pipe (6), the shaft center of the connecting head (10) is provided with a through hole (17) matched with the end of the tee pipe (6), and the inner wall of the through hole (17) is provided with an annular groove (16) matched with the annular plate (15).

5. A dual shaft lime kiln with pre-mixed combustion gas flow alternately calcining according to claim 1, characterized in that: The second communication assembly comprises a folding pipe (7) and an air inlet pipe (8), the folding pipe (7) is fixedly connected with the end of the tee pipe (6), the other end of the folding pipe (7) is fixedly connected with the air inlet pipe (8), and the other end of the air inlet pipe (8) is fixedly connected with the bottom of the outer shell (4) and is in a communicated state with the heat preservation interlayer (5).

6. A dual shaft lime kiln with alternating firing of premixed combustion gases according to claim 1, characterized in that: The upper end of the outer shell (4) is fixedly connected with an exhaust pipe (11), the exhaust pipe (11) is in a communicated state with the heat preservation interlayer (5), and the other end of the exhaust pipe (11) is communicated with a waste gas treatment mechanism.

7. A dual shaft lime kiln with alternating flow of pre-mixed combustion gases according to claim 5, characterized in that: The air inlet pipe (8) is fixed on the outer wall of the outer shell (4) through a plurality of fixed plates (9), and the plurality of fixed plates (9) are arranged in a straight line.

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