Flue gas mixing equipment
By introducing fresh air into the flue gas mixing equipment and using the low-pressure zone design, the problem of gas unevenness in the rotary kiln is solved, the reaction efficiency is improved and the cost of exhaust gas treatment is reduced.
Patent Information
- Application Number
- CN202422069637.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-26
AI Technical Summary
In the prior art, the rotary kiln has gas unevenness in the process of mixing and reusing exhaust gas and fresh air, resulting in the problem of incomplete reaction.
A flue gas mixing device is designed to form a low-pressure zone by introducing fresh air into the mixing chamber and suddenly increasing the diameter of the mixing chamber to promote the inlet of fresh air. At the same time, lubricating oil is used to lubricate the gear ring to ensure uniform lubrication of each component and reduce wear.
The uniform mixing of gas is achieved, the reaction efficiency of the rotary kiln is improved, and the cost of exhaust gas treatment is reduced.
Smart Images
Figure CN223138306U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas mixing, in particular to a flue gas mixing device. Background Art
[0002] Rotary kiln: A rotary kiln is a rotary hearth kiln, which refers to a rotary calcination kiln. Equipment that uses a rotary kiln to mechanically, physically, or chemically process solid materials is called a rotary kiln. Primary air: Primary air is the air that rotates the rotary kiln, also known as inlet air or combustion air. It refers to the mixture of air and fuel inhaled by a fan that enters the rotary kiln to cause a combustion reaction. Its main function is to generate a high-temperature heat source to promote the sintering and ripening of raw materials in the rotary kiln. The temperature of the primary air is generally between 900°C and 1200°C, and the air volume needs to be adjusted according to the size of the kiln and the process parameters of the equipment to ensure the composition and quality of the clinker. Secondary air: Secondary air is the air that circulates in the environment inside the rotary kiln, also known as reaction air. It mainly conducts chemical reactions such as drying, preheating, and decomposition on the raw materials inside the rotary kiln, thereby further promoting the sintering process. The temperature of the secondary air after entering the kiln is generally between 600°C and 800°C, and the size of the air volume also needs to be adjusted according to the process parameters of the equipment.
[0003] During the operation of the rotary kiln, a large amount of secondary air needs to be supplied. Usually, it accounts for 6 - 8 times that of the primary air. The main function of the secondary air is to act as a heat transfer medium inside the rotary kiln for heat distribution and transfer. At the same time, part of the air participates in the chemical reaction of the materials to make up for the shortage of the primary air. However, for an environmentally friendly rotary kiln, due to problems in the tail gas process, the increase in the amount of secondary air greatly increases the tail gas treatment cost. To reduce the amount of exhaust tail gas, a method of using part of the flue gas as recycled secondary air and then continuing to supplement fresh air is adopted. However, in the specific use process, when mixing and recycling the tail gas and fresh air, the problem of uneven mixed gas will be encountered, resulting in incomplete reaction in the rotary kiln. Therefore, in view of the above problems, a flue gas mixing device is now proposed. Summary of the Utility Model
[0004] To make up for the above deficiencies, the utility model provides a flue gas mixing device, aiming to improve the problem that in the prior art, some devices will encounter the situation of uneven mixed gas, resulting in incomplete reaction in the rotary kiln.
[0005] To achieve the above object, the utility model adopts the following technical scheme:
[0006] Flue gas mixing equipment, including a bottom plate, on the top right side of the bottom plate is fixedly connected with a kiln head intake chamber, in the middle of the top of the bottom plate is fixedly connected with an integral cooler, on the top of the integral cooler is fixedly connected with a burner, on the top left side of the bottom plate is fixedly connected with a kiln tail smoke chamber, outside the kiln tail smoke chamber is fixedly connected with a rotary kiln, on the outside of the rotary kiln are fixedly connected with a plurality of tooth blocks, on the outside of the rotary kiln is fixedly connected with a Venturi valve, outside the kiln tail smoke chamber is fixedly connected with a support plate, on the top of the bottom plate are fixedly connected with a plurality of support legs, on the top of the support legs is fixedly connected with a placement plate, and on the top of the placement plate is fixedly connected with a drive assembly for providing power;
[0007] As a further description of the above technical solution:
[0008] The drive assembly includes a fixing plate, on the top of the fixing plate is fixedly connected with a motor, on the drive end of the motor is fixedly connected with a gear, on the outside of the gear is fixedly connected with a placement box, on the outside of the placement box is rotatably connected with a gear ring, and the outside of the fixing plate is fixedly connected to the outside of the placement plate;
[0009] As a further description of the above technical solution:
[0010] On the top of the placement plate is fixedly connected with a frame, and on the outside of the frame is fixedly connected with an oil tank;
[0011] As a further description of the above technical solution:
[0012] Inside the oil tank is rotatably connected with a connecting shaft, and on the outside of the connecting shaft are fixedly connected with a plurality of baffles;
[0013] As a further description of the above technical solution:
[0014] On the top of the oil tank is fixedly connected with a feed pipe, and on the bottom of the oil tank is fixedly connected with a discharge pipe;
[0015] As a further description of the above technical solution:
[0016] The outside of the baffle is rotatably connected inside the oil tank, and on the outside of the rotary kiln is fixedly connected with a connecting ring;
[0017] As a further description of the above technical solution:
[0018] On the outside right side of the burner is fixedly connected with a natural gas inlet, and on the top of the natural gas inlet is fixedly connected with an air inlet;
[0019] As a further description of the above technical solution:
[0020] The outside of the gear is meshed with the outside of the gear ring, and the outside of the gear ring is meshed with the outside of the tooth block.
[0021] The utility model has the following beneficial effects:
[0022] 1. In the utility model, fresh air enters the mixing chamber from the middle of the middle flue gas pipeline, and the air inlet is located at the position of the mixing chamber and the inlet of the flue gas pipeline. Since the inner diameter of the mixing chamber suddenly increases, a low-pressure area is formed at the inlet, which is more conducive to the entry of fresh air.
[0023] 2. In the utility model, by pouring lubricating oil into the inside of the fuel tank, the baffle can rotate inside the fuel tank, and then the lubricating oil can fall into the inside of the gear ring in an orderly manner. The lubricating oil can be evenly distributed inside the gear ring to ensure that each part can be fully lubricated and reduce wear caused by uneven lubrication. Description of the Drawings
[0024] Figure 1 is a three-dimensional schematic diagram of the flue gas mixing device proposed by the utility model;
[0025] Figure 2 is a structural schematic diagram of the placement plate of the flue gas mixing device proposed by the utility model;
[0026] Figure 3 is a structural schematic diagram of the connecting ring of the flue gas mixing device proposed by the utility model;
[0027] Figure 4 is Figure 3 an enlarged view of part A in
[0028] Legend:
[0029] 1. Bottom plate; 2. Kiln head intake chamber; 3. Integral cooler; 4. Burner; 5. Rotary kiln; 6. Venturi valve; 7. Kiln tail smoke chamber; 8. Support plate; 9. Support leg; 10. Placement plate; 11. Fixed plate; 12. Motor; 13. Gear; 14. Placement box; 15. Gear ring; 16. Tooth block; 17. Frame; 18. Fuel tank; 19. Connecting shaft; 20. Baffle; 21. Feed pipe; 22. Discharge pipe; 23. Connecting ring; 24. Natural gas inlet; 25. Air inlet. Detailed Implementation Manner
[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0031] Referring to Figures 1 to 3 , an embodiment provided by the present utility model: a flue gas mixing device, including a bottom plate 1. On the right side of the top of the bottom plate 1, a kiln head air inlet chamber 2 is fixedly connected, and the kiln head air inlet chamber 2 is used to introduce external gas. In the middle of the top of the bottom plate 1, an integral cooler 3 is fixedly connected, and the integral cooler 3 is used to cool the flue gas. On the top of the integral cooler 3, a burner 4 is fixedly connected. The burner 4 is used to generate high-temperature flames to heat the flue gas and is made of high-temperature resistant alloy materials to withstand high-temperature environments. The burner 4 is used to generate high-temperature flames to heat the flue gas. On the left side of the top of the bottom plate 1, a kiln tail flue gas chamber 7 is fixedly connected, and the kiln tail flue gas chamber 7 is used to collect and discharge flue gas. Outside the kiln tail flue gas chamber 7, a rotary kiln 5 is fixedly connected, and the rotary kiln 5 is used to calcine raw materials at high temperatures. Outside the rotary kiln 5, a plurality of tooth blocks 16 are fixedly connected, and the tooth blocks 16 are used to drive the rotational movement of the rotary kiln 5. Outside the rotary kiln 5, a Venturi valve 6 is fixedly connected, and the Venturi valve 6 is used to control the flow rate and pressure of the flue gas. Outside the kiln tail flue gas chamber 7, a support plate 8 is fixedly connected, and the support plate 8 is used to provide additional support force. On the top of the bottom plate 1, a plurality of support legs 9 are fixedly connected, and the support legs 9 are used to support the stable operation of the entire device. On the top of the support legs 9, a placement plate 10 is fixedly connected, and the placement plate 10 is used to place other components or devices. On the top of the placement plate 10, a drive assembly for providing power is fixedly connected. The drive assembly includes a fixing plate 11. On the top of the fixing plate 11, a motor 12 is fixedly connected, and the motor 12 serves as the power source of the entire device. The driving end of the motor 12 is fixedly connected with a gear 13, and the gear 13 transmits power by meshing with the tooth blocks 16 on the rotary kiln 5. Outside the gear 13, a placement box 14 is fixedly connected, and the placement box 14 is used to accommodate other related components. Outside the placement box 14, a gear ring 15 is rotatably connected, and the gear ring 15 cooperates with the gear 13 to achieve power transmission. The outside of the fixing plate 11 is fixedly connected to the outside of the placement plate 10 to ensure the stability and reliability of the drive assembly;
[0032] Referring to Figures 3 to 4, a frame 17 is fixedly connected to the top of the placement plate 10. The frame 17 is used to support and fix the fuel tank 18. An oil tank 18 is fixedly connected to the outside of the frame 17. The oil tank 18 is used to store the oil fluid, and a connecting shaft 19 is rotatably connected to its inside. A connecting shaft 19 is rotatably connected to the inside of the oil tank 18. A plurality of baffles 20 are fixedly connected to the outside of the connecting shaft 19. The baffles 20 are used to stir the oil fluid to maintain its uniformity. A feed pipe 21 is fixedly connected to the top of the oil tank 18. A discharge pipe 22 is fixedly connected to the bottom of the oil tank 18. The feed pipe 21 is used to convey raw materials into the oil tank 18. A discharge pipe 22 is fixedly connected to the bottom of the oil tank 18. The discharge pipe 22 is used to discharge materials from the oil tank 18. The outside of the baffle 20 is rotatably connected inside the oil tank 18 to achieve effective stirring of the oil fluid. A connecting ring 23 is fixedly connected to the outside of the rotary kiln 5. The connecting ring 23 is used to connect the rotary kiln 5 with other components. A natural gas inlet 24 is fixedly connected to the outside right side of the burner 4. The natural gas inlet 24 is used to introduce natural gas as fuel. An air inlet 25 is fixedly connected to the top of the natural gas inlet 24. The air inlet 25 is used to introduce air to promote combustion. The outside of the gear 13 is meshed with the outside of the gear ring 15, and the outside of the gear ring 15 is meshed with the outside of the tooth block 16 to achieve the rotational movement of the rotary kiln 5.
[0033] Working principle: Part of the reflux flue gas enters the mixer through the mixed intake pipe, and fresh air enters from the side and jointly enters at the air inlet of the mixer. The mixer passes through the packing mixing layer, fully refluxes and mixes, and then enters the kiln head intake chamber through the control of the Venturi valve 6 and enters the rotary kiln 5 as secondary air;
[0034] By starting the motor 12, under the action of the motor 12, the motor 12 can drive the gear 13 to rotate. Under the rotation of the gear 13, the gear 13 can drive the gear ring 15 to rotate. Under the rotation of the gear ring 15, during the rotation of the gear ring 15, by pouring lubricating oil into the inside of the oil tank 18, the baffle 20 can rotate inside the oil tank 18, and then the lubricating oil can fall into the inside of the gear ring 15 in an orderly manner.
[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. Flue gas mixing device, including a bottom plate (1), characterized in that: On the right side of the top of the bottom plate (1), a kiln head air inlet chamber (2) is fixedly connected. In the middle of the top of the bottom plate (1), an integral cooler (3) is fixedly connected. On the top of the integral cooler (3), a burner (4) is fixedly connected. On the left side of the top of the bottom plate (1), a kiln tail smoke chamber (7) is fixedly connected. Outside the kiln tail smoke chamber (7), a rotary kiln (5) is fixedly connected. Outside the rotary kiln (5), a plurality of tooth blocks (16) are fixedly connected. Outside the rotary kiln (5), a Venturi valve (6) is fixedly connected. Outside the kiln tail smoke chamber (7), a support plate (8) is fixedly connected. On the top of the bottom plate (1), a plurality of support legs (9) are fixedly connected. On the top of the support legs (9), a placement plate (10) is fixedly connected. On the top of the placement plate (10), a drive assembly for providing power is fixedly connected.
2. The flue gas mixing device according to claim 1, wherein: The drive assembly includes a fixing plate (11). On the top of the fixing plate (11), a motor (12) is fixedly connected. On the driving end of the motor (12), a gear (13) is fixedly connected. Outside the gear (13), a placement box (14) is fixedly connected. Outside the placement box (14), a gear ring (15) is rotatably connected. Outside the fixing plate (11), it is fixedly connected to the outside of the placement plate (10).
3. The flue gas mixing device according to claim 1, characterized in that: On the top of the placement plate (10), a frame (17) is fixedly connected. Outside the frame (17), an oil tank (18) is fixedly connected.
4. The flue gas mixing device according to claim 3, characterized in that: Inside the oil tank (18), a connecting shaft (19) is rotatably connected. Outside the connecting shaft (19), a plurality of baffle plates (20) are fixedly connected.
5. The flue gas mixing device according to claim 4, characterized in that: On the top of the oil tank (18), a feed pipe (21) is fixedly connected. On the bottom of the oil tank (18), a blanking pipe (22) is fixedly connected.
6. The flue gas mixing device according to claim 5, characterized in that: Outside the baffle plate (20), it is rotatably connected inside the oil tank (18). Outside the rotary kiln (5), a connecting ring (23) is fixedly connected.
7. The flue gas mixing device according to claim 1, wherein: On the right side of the outside of the burner (4), a natural gas inlet (24) is fixedly connected. On the top of the natural gas inlet (24), an air inlet (25) is fixedly connected.
8. The flue gas mixing device according to claim 2, characterized in that: Between the outside of the gear (13) and the outside of the gear ring (15), there is a meshing connection. Between the outside of the gear ring (15) and the outside of the tooth block (16), there is a meshing connection.