Energy-saving combustion device of dry-process rotary cement kiln

Abstract

The utility model discloses a dry process cement rotary kiln energy-saving combustion device which comprises a base, a preheating box is arranged on the upper portion of the left side of the base, a material conveying pipe is arranged on the right side of the preheating box, a rotating shaft is arranged on the right side of the material conveying pipe, and the right end of the rotating shaft penetrates through the left side of a combustion furnace and is fixedly connected with a rotary kiln body. The rotary kiln body is arranged in the combustion furnace, a ventilation pipe is fixedly connected to the left side of the upper portion of the combustion furnace, a fixing box is fixedly connected to the left end of the ventilation pipe, a screen is fixedly connected to the interior of the fixing box, and a second driving motor is arranged on the upper portion of the combustion furnace. The output end of the second driving motor is fixedly connected with a driving assembly, and the lower portion of the driving assembly is fixedly connected with a fuel conveying box. By means of the structure, heat in waste gas can be recycled, so that energy efficiency is improved, energy consumption is reduced, meanwhile, pulverized coal is crushed, caking is avoided, and the overall calcination effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dry process cement processing, in particular to an energy-saving combustion device for a dry process cement rotary kiln. Background Art

[0002] The production process of dry cement includes raw material crushing, raw material preparation, raw material homogenization, preheating and decomposition, cement clinker burning, cement grinding, etc. Among them, preheating and decomposition and cement clinker burning are completed in the rotary kiln system.

[0003] During use, traditional rotary kilns cannot effectively process the coal powder transported to the rotary kiln combustion chamber. There may be agglomerated coal powder that is difficult to burn or blocks the discharge pipe, thereby affecting the combustion effect. At the same time, the heat inside the exhaust gas generated during combustion is not recycled, resulting in energy loss. Utility Model Content

[0004] The purpose of the utility model is to provide an energy-saving combustion device for a dry cement rotary kiln, which can recover and utilize the heat in the exhaust gas to improve energy efficiency and reduce energy consumption, and at the same time crush the coal powder to avoid agglomeration and improve the overall calcination effect.

[0005] To achieve the above-mentioned object, a dry process cement rotary kiln energy-saving combustion device is provided, comprising a base, a preheating box is provided on the upper left portion of the base, a material delivery pipe is provided on the right outer surface of the preheating box, a rotating shaft is provided on the right outer surface of the material delivery pipe, the right end of the rotating shaft passes through the left outer surface of the combustion furnace and is fixedly connected to a rotary kiln body, the rotary kiln body is arranged inside the combustion furnace, a ventilation pipe is fixedly connected to the upper left outer surface of the combustion furnace, the left end of the ventilation pipe is fixedly connected to a fixing box, and a screen is fixedly connected to the interior of the fixing box;

[0006] A second driving motor is provided on the upper portion of the combustion furnace. The output end of the second driving motor is fixedly connected to a driving assembly, and the lower portion of the driving assembly is fixedly connected to a fuel delivery box.

[0007] According to the energy-saving combustion device of a dry cement rotary kiln, a driving motor 1 is provided on the upper right outer surface of the base, the output end of the driving motor 1 is fixedly connected to a first gear, the upper end outer surface of the first gear is meshedly connected to a second gear, the inner surface of the second gear is fixedly connected to a rotating column, the left end of the rotating column passes through the right outer surface of the combustion furnace and is fixedly connected to the right outer surface of the rotary kiln body, driving the rotary kiln to rotate, thereby uniformly calcining the cement raw material.

[0008] According to the energy-saving combustion device of a dry cement rotary kiln, the left outer surface of the preheating box is fixedly connected to the driving motor three, the output end of the driving motor three is fixedly connected to the rotating rod, the outer surface of the rotating rod is fixedly connected to the auger blade, the rotating rod and the auger blade are both arranged inside the feeding pipe, and the upper part of the feeding pipe is provided with a discharge port to complete the transportation of cement raw material.

[0009] According to the energy-saving combustion device for a dry cement rotary kiln, a blower is fixedly connected to the interior of the fixed box, and an air outlet is provided at the bottom of the fixed box.

[0010] According to the energy-saving combustion device of a dry cement rotary kiln, a stirring rod is provided on the upper inner surface of the fuel delivery box, and a stirring blade is fixedly connected to the outer surface of the stirring rod. The lower part of the fuel delivery box is fixedly connected to a discharge pipe, and a valve is provided inside the discharge pipe to crush the coal powder and prevent it from agglomerating.

[0011] According to the energy-saving combustion device of a dry cement rotary kiln, a discharge pipe is provided on the lower outer surface of the right side of the rotary kiln body, and a sealing cover is provided on the lower outer surface of the discharge pipe. The discharge pipe and the sealing cover are detachably connected to facilitate discharge.

[0012] According to the energy-saving combustion device of a dry cement rotary kiln, a cylinder is provided on the upper middle outer surface of the base, the rod of the cylinder is fixedly connected to a limiting block, and the upper outer surface of the limiting block is slidably connected to the lower outer surface of the combustion furnace.

[0013] According to the energy-saving combustion device of a dry cement rotary kiln, the upper outer surface of the base is fixedly connected to two fixed columns, the rotating shaft is rotatably connected to the inner surface of the fixed column on the left, and the interior of the fixed column on the right is rotatably connected to a rotating column to play a limiting role.

[0014] The utility model has the following beneficial effects:

[0015] 1. Compared with the existing technology, this dry cement rotary kiln energy-saving combustion device, through the setting of the blower, allows the high-temperature exhaust gas from the rotary kiln to enter the fixed box through the ventilation pipe, and then enter the preheating box from the air outlet to exchange heat with the raw material. Multiple screens are set inside the preheating box, so that the gas at each level can exchange heat with the raw material, thereby improving heat utilization efficiency and reducing energy consumption.

[0016] 2. Compared with the existing technology, this dry cement rotary kiln energy-saving combustion device is equipped with a drive motor 2 and a drive assembly to drive the stirring rod inside the fuel delivery box to rotate, thereby driving the stirring blade to rotate, breaking the coal powder to prevent it from agglomerating. At the same time, it is equipped with multiple discharge pipes and valves to divide the fuel into multiple injection points and burn in different temperature zones, which helps to improve combustion efficiency and reduce nitrogen oxide emissions.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a schematic diagram of the overall structure of an energy-saving combustion device for a dry-process cement rotary kiln according to the present invention;

[0020] Figure 2 This is a front cross-sectional view of an energy-saving combustion device for a dry-process cement rotary kiln according to the present utility model;

[0021] Figure 3 This utility model is a dry process cement rotary kiln energy-saving combustion device Figure 2 A schematic diagram of the structure at point A in the middle;

[0022] Figure 4 This utility model is a dry process cement rotary kiln energy-saving combustion device Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0023] Figure 5 This utility model is a dry process cement rotary kiln energy-saving combustion device Figure 2 Schematic diagram of the enlarged structure at point C in the middle.

[0024] Legend:

[0025] Base; 2. Preheating box; 3. Combustion furnace; 4. Ventilation pipe; 5. Fixed box; 6. Rotary kiln body; 7. Driving motor 1; 8. First gear; 9. Second gear; 10. Rotating column; 11. Driving motor 2; 12. Driving assembly; 13. Fuel delivery box; 14. Discharge pipe; 15. Sealing cover; 16. Cylinder; 17. Limit block; 18. Fixed column; 19. Rotating shaft;

[0026] 21. Driving motor 3; 22. Rotating rod; 23. Auger blade; 24. Feeding port; 25. Screen; 26. Feed pipe; 51. Blower; 52. Air outlet; 131. Stirring rod; 132. Stirring blade; 133. Feeding pipe; 134. Valve. DETAILED DESCRIPTION

[0027] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0028] Reference Figure 1-5The embodiment of the present invention is an energy-saving combustion device for a dry cement rotary kiln, which includes a base 1, a preheating box 2 is provided on the upper left side of the base 1, and a feeding port is provided on the upper outer surface of the preheating box 2 to realize the feeding of cement raw material, an air outlet is provided on the right outer surface of the preheating box 2, and a protective net is fixedly connected to the inside of the air outlet, a driving motor 3 21 is fixedly connected to the outer surface of the left side of the preheating box 2, a rotating rod 22 is fixedly connected to the output end of the driving motor 3 21, an auger blade 23 is fixedly connected to the outer surface of the rotating rod 22, and the rotating rod 22 and the auger blade 23 are both arranged inside the feeding pipe 26, and a feeding port 24 is provided on the upper part of the feeding pipe 26. The right outer surface of the rotary kiln body 6 is provided with a feeding pipe 26 to complete the transportation of cement raw material. The right outer surface of the feeding pipe 26 is provided with a rotating shaft 19. The right end of the rotating shaft 19 passes through the left outer surface of the combustion furnace 3 and is fixedly connected to the rotary kiln body 6. The right lower outer surface of the rotary kiln body 6 is provided with a discharge pipe 14. The lower outer surface of the discharge pipe 14 is provided with a sealing cover 15. The discharge pipe 14 and the sealing cover 15 are detachably connected to realize the discharge of cement. The rotary kiln body 6 is arranged inside the combustion furnace 3. The interior of the combustion furnace 3 is provided with an igniter to ignite the coal powder and support the combustion furnace 3. The upper left outer surface of the combustion furnace 3 is fixedly connected to the It is connected to a ventilation pipe 4, and a filter is provided on the inner surface of the left end of the ventilation pipe 4 to filter the exhaust gas. The left end of the ventilation pipe 4 is fixedly connected to a fixed box 5, and a screen 25 is fixedly connected to the inside of the fixed box 5 to help prolong the residence time of the raw material in the preheating box 2 and promote full contact and heat exchange with the hot air. A blower 51 is fixedly connected to the inside of the fixed box 5, and an air outlet 52 is provided at the lower part of the fixed box 5. A driving motor 7 is provided on the outer surface of the upper right side of the base 1. The output end of the driving motor 7 is fixedly connected to a first gear 8. The outer surface of the upper end of the first gear 8 is meshed with a second gear 9. The inner surface of the second gear 9 is fixedly connected to a rotating column 10. The left end of the moving column 10 passes through the right outer surface of the combustion furnace 3 and is fixedly connected to the right outer surface of the rotary kiln body 6, driving the rotary kiln body 6 to rotate, driving the cement raw material inside it to rotate, and then uniformly heating the cement raw material, thereby improving the calcination efficiency. A cylinder 16 is provided on the upper middle outer surface of the base 1, and the rod of the cylinder 16 is fixedly connected to the limiting block 17. The upper outer surface of the limiting block 17 is slidingly connected to the lower outer surface of the combustion furnace 3 to realize discharging. The upper outer surface of the base 1 is fixedly connected to two fixed columns 18, and the rotating shaft 19 is rotatably connected to the inner surface of the left fixed column 18. The inner surface of the right fixed column 18 is rotatably connected to the rotating column 10.

[0029] A driving motor 11 is provided on the upper part of the combustion furnace 3, and the output end of the driving motor 11 is fixedly connected to the driving component 12, and the lower part of the driving component 12 is fixedly connected to the fuel delivery box 13. The rear side of the fuel delivery box 13 is provided with a coal inlet to realize the feeding of coal powder. The upper inner surface of the fuel delivery box 13 is provided with a stirring rod 131, and the outer surface of the stirring rod 131 is fixedly connected to a stirring blade 132, which plays a role in crushing the coal powder and preventing it from agglomerating. The lower part of the fuel delivery box 13 is fixedly connected to a discharge pipe 133, and a valve 134 is provided inside the discharge pipe 133.

[0030] Working principle: When using this dry process cement rotary kiln energy-saving combustion device, the cement raw material to be calcined is sent to the interior of the preheating box 2 through the feed port, and by starting the driving motor 3 21, the rotating rod 22 and the auger blade 23 are driven to rotate, and the raw material is sent to the interior of the rotary kiln body 6. At the same time, pulverized coal is poured into the coal inlet at the rear side of the fuel delivery box 13, and then by starting the driving motor 2 11, the driving component 12 is driven to move, thereby driving the stirring rod 131 and the stirring blade 132 inside the fuel delivery box 13 to rotate, breaking the pulverized coal to prevent it from agglomerating, and then passing through the discharge pipe 133 and the valve 13. 4 is used to divide the fuel into multiple injection points and burn it in different temperature zones to improve combustion efficiency. Then, the igniter inside the combustion furnace 3 is started to ignite the pulverized coal. The heat generated by the burning pulverized coal heats the rotary kiln body 6, so that the cement raw material in the rotary kiln body 6 can be calcined. During the calcination process, the drive motor 1 7 is started to drive the first gear 8 and the second gear 9 to rotate, thereby driving the rotating column 10 to rotate, and then driving the rotary kiln body 6 to rotate. The rotary kiln body 6 will drive the internal cement raw material to turn over, so that the cement raw material can be better heated and calcined.

[0031] During the cement calcination process, the blower 51 is started to allow the high-temperature exhaust gas inside the combustion furnace 3 to enter the preheating box 2 through the vent pipe 4 and the air outlet 52. The hot air flow directly contacts the falling raw material to preheat the raw material. At the same time, the multiple screens 25 help to extend the residence time of the raw material in the preheating box 2, promote sufficient contact and heat exchange with the hot gas, so that the gas at each level can exchange heat with the raw material, thereby improving heat utilization efficiency. The exchanged gas is discharged from the air outlet on the right outer surface of the preheating box 2.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A dry process cement rotary kiln energy-saving combustion device, characterized in that: The rotary kiln comprises a base (1), a preheating box (2) is provided on the upper left side of the base (1), a feeding pipe (26) is provided on the right outer surface of the preheating box (2), a rotating shaft (19) is provided on the right outer surface of the feeding pipe (26), the right end of the rotating shaft (19) passes through the left outer surface of the combustion furnace (3) and is fixedly connected to a rotary kiln body (6), the rotary kiln body (6) is arranged inside the combustion furnace (3), a ventilation pipe (4) is fixedly connected to the left outer surface of the upper part of the combustion furnace (3), the left end of the ventilation pipe (4) is fixedly connected to a fixed box (5), and a screen (25) is fixedly connected inside the fixed box (5); A second drive motor (11) is provided on the upper portion of the combustion furnace (3), an output end of the second drive motor (11) is fixedly connected to a drive assembly (12), and a lower portion of the drive assembly (12) is fixedly connected to a fuel delivery box (13).

2. The energy-saving combustion device for a dry process cement rotary kiln according to claim 1, characterized in that: A driving motor 1 (7) is provided on the right outer surface of the upper portion of the base (1), the output end of the driving motor 1 (7) is fixedly connected to a first gear (8), the upper outer surface of the first gear (8) is meshedly connected to a second gear (9), the inner surface of the second gear (9) is fixedly connected to a rotating column (10), and the left end of the rotating column (10) passes through the right outer surface of the combustion furnace (3) and is fixedly connected to the right outer surface of the rotary kiln body (6).

3. The energy-saving combustion device for a dry process cement rotary kiln according to claim 1, characterized in that: The left outer surface of the preheating box (2) is fixedly connected to a driving motor three (21), the output end of the driving motor three (21) is fixedly connected to a rotating rod (22), the outer surface of the rotating rod (22) is fixedly connected to an auger blade (23), the rotating rod (22) and the auger blade (23) are both arranged inside the feeding pipe (26), and a discharge port (24) is opened at the upper part of the feeding pipe (26).

4. The energy-saving combustion device for a dry process cement rotary kiln according to claim 1, characterized in that: A blower (51) is fixedly connected to the interior of the fixed box (5), and an air outlet (52) is provided at the lower portion of the fixed box (5).

5. The energy-saving combustion device for a dry process cement rotary kiln according to claim 1, characterized in that: The upper inner surface of the fuel delivery box (13) is provided with a stirring rod (131), the outer surface of the stirring rod (131) is fixedly connected to a stirring blade (132), the lower portion of the fuel delivery box (13) is fixedly connected to a discharge pipe (133), and a valve (134) is provided inside the discharge pipe (133).

6. The energy-saving combustion device for a dry process cement rotary kiln according to claim 1, characterized in that: A discharge pipe (14) is provided on the lower outer surface of the right side of the rotary kiln body (6), and a sealing cover (15) is provided on the lower outer surface of the discharge pipe (14). The discharge pipe (14) and the sealing cover (15) are detachably connected.

7. The energy-saving combustion device for a dry process cement rotary kiln according to claim 1, characterized in that: A cylinder (16) is provided on the upper middle outer surface of the base (1), the rod of the cylinder (16) is fixedly connected to a limiting block (17), and the upper outer surface of the limiting block (17) is slidably connected to the lower outer surface of the combustion furnace (3).

8. The energy-saving combustion device for a dry process cement rotary kiln according to claim 1, characterized in that: Two fixed columns (18) are fixedly connected to the upper outer surface of the base (1), the rotating shaft (19) is rotatably connected to the inner surface of the left fixed column (18), and the interior of the right fixed column (18) is rotatably connected to the rotating column (10).

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