Grate bed air supply device

Abstract

The utility model discloses a grate bed air supply device, which relates to the technical field of cement production equipment and comprises two grate bed air inflation beams which are respectively arranged on two sides of a high-temperature section grate bed, and the bottom of each grate bed air inflation beam is fixedly connected with the upper ends of a plurality of second air inlet pipelines. The lower end of the second air inlet pipeline is connected with the upper end of a movable joint, the lower end of the movable joint is slidably connected with a grease joint arranged at the upper end of a third air inlet pipeline, the lower end of the third air inlet pipeline is fixedly connected with a first air inlet pipe, and an air inlet is formed in one end of the first air inlet pipe and connected with a fan. The grate bed air supply device is simple in structure and convenient to install, the grate bed inflation beam is adopted for independent ventilation, and the problems that when an air chamber supplies air, the ventilation area is too large, cold air is concentrated on the low-resistance coarse material side to permeate, the cold air on the high-resistance fine material side is small in permeation amount and cannot be cooled, the amount of air passing through the coarse material side is large, and the air amount is wasted are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cement production equipment, in particular to a grate bed air supply device. Background Art

[0002] In cement clinker production, calcination and cooling are critical steps that directly impact the properties of the final product. During the calcination process, the clinker is subjected to centrifugal force within the kiln, causing particle segregation. Specifically, large particles tend to concentrate in the center of the kiln shell, while fine particles gradually concentrate toward the sides. This segregation is particularly pronounced at high kiln speeds or when the kiln contains a high concentration of fine clinker particles. During the cooling phase, the densely packed fine clinker particles create significant resistance to the cooling air, causing it to pass less or not at all through the fine clinker layer, while more of it passes through the lower-resistance, larger particles layer. This results in ineffective cooling of the fine particles layer, resulting in a high surface temperature and a hot red color, while the larger particles layer cools, turning black. As the grate pushes, the temperature difference between the coarse and fine particles gradually increases, preventing the fine particles from being adequately cooled. Ultimately, a red-hot clinker band forms from the cooler's inlet to the outlet, the so-called "red river" phenomenon.

[0003] Grate cooler is a key equipment for achieving rapid cooling of clinker. Existing grate coolers usually adopt the form of an air chamber, in which the cold air is sent into the air chamber by a fan, and then the cold air is transported to the clinker layer through the grate plate. Although this method can achieve rapid cooling of clinker, it has the following problems: First, due to the uneven distribution of coarse and fine particles of clinker on the grate bed, the distribution of air volume on the grate bed is unreasonable. The resistance on the coarse material side is smaller, so that more cooling air passes through the coarse material side, while the fine material side has insufficient ventilation due to large resistance, resulting in uneven cooling effect; secondly, due to the uneven distribution of air volume, a larger air volume is required to ensure the cooling of the clinker, which increases the pressure of the fan, resulting in high energy consumption of the system and increased production costs; and the uneven distribution of air volume will also cause the local wind speed to be too fast, blowing up the clinker powder, increasing the load of the dust collection system. Utility Model Content

[0004] The purpose of the utility model is to provide a grate bed air supply device to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the present invention provides the following solutions:

[0006] The utility model provides a grate bed air supply device, comprising two grate bed air-filled beams, which are respectively arranged on both sides of the high-temperature section grate bed, the bottom of each grate bed air-filled beam is fixedly connected to the upper end of a plurality of second air inlet pipes, the lower end of the second air inlet pipes is connected to the upper end of a flexible joint, the lower end of the flexible joint is slidably connected to a dry oil joint arranged at the upper end of a third air inlet pipe, the lower end of the third air inlet pipe is fixedly connected to the first air inlet pipe, one end of the first air inlet pipe is provided with an air inlet, and the air inlet is connected to a fan.

[0007] In a feasible implementation, the second air inlet pipeline is welded to the grate bed inflation beam.

[0008] Good sealing is maintained through welding to prevent air leakage and cross-flow, which will affect the effective cooling of clinker on both sides of the grate bed.

[0009] In a feasible implementation, the flexible joint includes a flange, a threaded pipe and a base. The flange is fixedly connected to the upper end of the threaded pipe, the threaded pipe is aligned with the center of the flange, the base is fixed to the lower end of the threaded pipe, and a first air outlet is provided in the middle of the base. The flange is fixedly connected to the flange arranged at the lower end of the second air inlet duct by bolts, and the base is slidably connected to the dry oil joint.

[0010] When the grate bed is transporting clinker, it moves back and forth like a shuttle. A flexible joint is provided between the dry oil joint at the upper end of the second air inlet duct and the third air inlet duct to reduce the dynamic stress and vibration of the air inlet duct caused by the shuttle-like reciprocating motion.

[0011] In a feasible implementation, connecting rings are welded and fixed to the outer sides of both ends of the threaded pipe, and the two connecting rings are welded and fixed to the flange and the base respectively.

[0012] In a feasible implementation, a first retaining ring is provided on the outer side of the threaded tube, the lower end of the first retaining ring is fixedly connected to the upper side of the base, a slot is provided on the lower side of the flange, the upper end of the first retaining ring is inserted into the slot, and a groove is provided on the outer side of its upper end, and a second retaining ring is fixedly connected to the lower side of the flange to cooperate with the groove. The first retaining ring, the flange and the second retaining ring cooperate to form a movable labyrinth sealing structure.

[0013] In a feasible implementation, the dry oil joint includes a connecting plate fixed to the upper end of the third air inlet pipe, a dry oil groove is provided on the connecting plate, and a waist-shaped second air outlet is provided in the middle thereof, the dry oil groove is filled with dry grease, and the area of ​​the connecting plate is smaller than the area of ​​the base.

[0014] Adopt dry oil film seal to ensure the contact surface fit during operation, reduce friction between connecting parts, prevent gas leakage, and the dry oil is not easy to volatilize, which can maintain lubrication and sealing effects for a long time.

[0015] In a feasible implementation, a plurality of oil inlets are further provided on the connecting plate. The oil inlets are coaxially arranged with the oil tank, and the lower sides of the oil inlets are threadedly connected with oil nozzles.

[0016] In a feasible implementation, a transition air inlet duct is fixedly connected between the connecting plate and the third air inlet duct, the lower end of the transition air inlet duct is circular, and its lower end is flange-connected to the upper end of the third air duct, and the upper end of the transition air inlet duct is rectangular.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model provides a grate bed air supply device with a simple structure and easy installation. Grate bed air-filled beams are arranged on both sides of the high-temperature section of the grate bed and are connected to an air inlet pipe for ventilation and cooling. Since the clinker particle size and material layer thickness at different parts of the grate cooler material layer are different, the resistance of gas passing through the material layer at each part is different. The grate bed air-filled beams are used for separate ventilation, and a higher wind pressure and air volume can be selected to pass through the "red river" material layer, thereby eliminating and alleviating the "red river" phenomenon accordingly, and solving the problem that the ventilation area is too large when the wind chamber supplies air, the cold air is concentrated on the low-resistance coarse material side for penetration, while the cold air penetration amount on the high-resistance fine material side is small and cannot be cooled, the air volume passing through the coarse material side is large, and the air volume is wasted. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the grate bed air supply device of the utility model;

[0020] Figure 2 This is a schematic diagram of the grate bed air supply device of the utility model in the direction A;

[0021] Figure 3 It is a structural diagram of a flexible joint of the utility model;

[0022] Figure 4 It is a structural diagram of a flexible joint of the utility model;

[0023] Figure 5 It is a structural diagram of a flexible joint of the utility model;

[0024] Figure 6 It is a structural schematic diagram of the base of the flexible joint of the present utility model;

[0025] Figure 7 This is a structural diagram of the connecting plate of the dry oil joint of the present utility model;

[0026] Figure 8 This is a structural diagram of the connecting plate and transition air inlet duct of the utility model;

[0027] In the figure, 1-grate bed inflatable beam, 2-second air inlet pipe, 3-swivel joint, 4-third air inlet pipe, 5-dry oil joint, 31-flange, 32-threaded pipe, 33-base, 34-first air outlet, 35-connecting ring, 36-first retaining ring, 37-second retaining ring, 51-connecting plate, 52-glycerin groove, 53-third air outlet, 54-oil inlet, 55-oil nozzle, 56-transition air inlet pipe. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating positions or positional relationships, are based on the positions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the positions or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] Example 1

[0031] See also Figures 1 to 8The present invention provides a grate bed air supply device, comprising two grate bed air beams 1, the two grate bed air beams 1 being respectively arranged on both sides of the high-temperature section grate bed, the bottom of each grate bed air beam 1 being fixedly connected to the upper end of a plurality of second air inlet pipes 2, the second air inlet pipes 2 being welded to the grate bed air beams 1, and maintaining good sealing performance through welding to prevent air leakage and cross-flow from occurring, thereby affecting the effective cooling of the clinker on both sides of the grate bed. The lower end of the second air inlet pipe 2 is connected to the upper end of a flexible joint 3, the lower end of the flexible joint 3 is slidably connected to a dry oil joint 5 arranged at the upper end of a third air inlet pipe 4, the lower end of the third air inlet pipe 4 is fixedly connected to a first air inlet pipe 6, one end of the first air inlet pipe 6 is provided with an air inlet, and the air inlet is connected to a fan. The flexible joint 3 comprises a flange 31, a threaded tube 32, and a base 33. The flange 31 is fixedly connected to the upper end of the threaded tube 32, with the center of the threaded tube 32 aligned with the flange 31. The base 33 is fixed to the lower end of the threaded tube 32 and has a first air inlet 34 in its center. The flange 31 is fixedly connected to the flange at the lower end of the second air inlet duct 2 by bolts, and the base 33 is slidably connected to the grease joint 5. Connecting rings 35 are welded to the outer sides of both ends of the threaded tube 32, and the two connecting rings 35 are welded to the flange 31 and the base 33, respectively. A first retaining ring 36 is spaced apart from the outer side of the threaded tube 32. The lower end of the first retaining ring 36 is fixedly connected to the upper side of the base 33. The lower side of the flange 31 has a slot, and the upper end of the first retaining ring 36 is inserted into the slot. The outer side of the upper end of the first retaining ring 36 has a groove. A second retaining ring 37 is fixedly connected to the lower side of the flange 31, which mates with the groove. The first retaining ring 36, flange 31, and second retaining ring 37 cooperate to form a movable labyrinth seal structure. Since the grate bed performs a shuttle-like reciprocating motion when transporting clinker, a flexible joint 3 is provided between the second air inlet duct 2 and the dry oil joint 5 at the upper end of the third air inlet duct 4 to reduce the dynamic stress and vibration caused by the shuttle-like reciprocating motion on the air inlet duct. The dry oil joint 5 includes a connecting plate 51 fixed to the upper end of the third air inlet duct. A dry oil groove 52 and a plurality of oil inlets 54 are provided on the connecting plate 51. A waist-shaped second air port 53 is provided in the middle of the connecting plate 51. The dry oil groove 52 is filled with dry oil. The oil inlet 54 is coaxially arranged with the oil groove. The lower side of the oil inlet 54 is threadedly connected to an oil nozzle 55. The area of ​​the connecting plate 51 is smaller than that of the base 33. The dry oil film seal is used to ensure that the contact surfaces fit during operation, reduce friction between the connecting parts, and prevent gas leakage. The dry oil is not easy to evaporate and can maintain the lubrication and sealing effects for a long time. A transition air inlet duct 56 is fixedly connected between the connecting plate 51 and the third air inlet duct. The lower end of the transition air inlet duct 56 is circular and flange-connected to the upper end of the third air duct. The upper end of the transition air inlet duct 56 is rectangular.

[0032] The grate bed air supply device provided by the utility model has a simple structure and is easy to install. The left and right side beams of the high-temperature section grate bed are replaced with grate bed inflatable beams, and are connected to the air inlet pipeline for ventilation and cooling. Since the clinker particle size and material layer thickness at different parts of the grate cooler material layer are different, the resistance of gas passing through the material layer at each part is different. The grate bed inflatable beams are used for separate ventilation, and a higher wind pressure and air volume can be selected to pass through the "red river" material layer, thereby eliminating and alleviating the "red river" phenomenon accordingly, and solving the problem that the ventilation area is too large when the wind chamber is supplying air, the cold air is concentrated on the low-resistance coarse material side for penetration, while the cold air penetration amount on the high-resistance fine material side is small and cannot be cooled, the air volume passing through the coarse material side is large, and the air volume is wasted.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A grate bed air supply device, characterized in that: It includes two grate bed inflation beams, which are respectively arranged on both sides of the high-temperature section grate bed. The bottom of each grate bed inflation beam is fixedly connected to the upper end of several second air inlet pipes, the lower end of the second air inlet pipe is connected to the upper end of the flexible joint, the lower end of the flexible joint is slidably connected to the dry oil joint arranged at the upper end of the third air inlet pipe, the lower end of the third air inlet pipe is fixedly connected to the first air inlet pipe, and an air inlet is provided at one end of the first air inlet pipe, and the air inlet is connected to the fan.

2. The grate bed air supply device according to claim 1, characterized in that: The second air inlet pipeline is welded to the grate bed inflatable beam.

3. The grate bed air supply device according to claim 1, characterized in that: The flexible joint includes a flange, a threaded pipe and a base. The flange is fixedly connected to the upper end of the threaded pipe, and the center of the threaded pipe is aligned with the center of the flange. The base is fixed to the lower end of the threaded pipe, and a first air outlet is provided in the middle of the base. The flange is fixedly connected to the flange arranged at the lower end of the second air inlet pipe by bolts, and the base is slidably connected to the dry oil joint.

4. The grate bed air supply device according to claim 3, characterized in that: Connecting rings are welded and fixed to the outer sides of both ends of the threaded pipe, and the two connecting rings are welded and fixed to the flange and the base respectively.

5. The grate bed air supply device according to claim 4, characterized in that: A first retaining ring is provided on the outer side of the threaded tube, and the lower end of the first retaining ring is fixedly connected to the upper side of the base. A slot is provided on the lower side of the flange, and the upper end of the first retaining ring is inserted into the slot, and a groove is provided on the outer side of its upper end. A second retaining ring that cooperates with the groove is fixedly connected to the lower side of the flange. The first retaining ring, the flange and the second retaining ring cooperate to form a movable labyrinth sealing structure.

6. The grate bed air supply device according to claim 1, characterized in that: The dry oil joint includes a connecting plate fixed to the upper end of the third air inlet pipe, a dry oil groove is provided on the connecting plate, and a waist-shaped second air outlet is provided in the middle thereof, the dry oil groove is filled with dry grease, and the area of ​​the connecting plate is smaller than the area of ​​the base.

7. The grate bed air supply device according to claim 6, characterized in that: The connecting plate is further provided with a plurality of oil inlets, which are coaxially arranged with the oil groove, and the lower side of the oil inlet is threadedly connected with an oil nozzle.

8. The grate bed air supply device according to claim 6, characterized in that: A transition air inlet duct is fixedly connected between the connecting plate and the third air inlet duct. The lower end of the transition air inlet duct is circular and flange-connected to the upper end of the third air duct. The upper end of the transition air inlet duct is rectangular.

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