Hot air recovery pipeline of rotary kiln

Abstract

The utility model provides a hot air recovery pipeline of a rotary kiln, and relates to the field of hot air recovery pipelines of rotary kilns, the hot air recovery pipeline comprises a recovery pipeline, the recovery pipeline comprises an air inlet part, a conveying part and an exhaust part, a control assembly for controlling the flow rate of flue gas is arranged in the air inlet part, and the control assembly comprises a first valve plate, a second valve plate, a first gear, a second gear and a motor; through the driving of the motor, the first valve plate and the second valve plate rotate relatively, so that the circulation area of the air inlet part is controlled to control the circulation amount of flue gas, and the temperature stability in the cement kiln and the temperature state of powder in the pulverizer are guaranteed.

Description

Technical Field

[0001] The present application relates to the field of hot air recovery pipelines for rotary kilns, and in particular, to a hot air recovery pipeline for rotary kilns. Background Art

[0002] Cement kilns are mainly used to calcine cement clinker. During the production process, the flue gas at the outlet of the kiln head boiler still has a certain temperature. In the existing technology, the kiln head boiler directly discharges the hot flue gas into the atmosphere, which emits greenhouse gases, affects the environment, causes energy waste, and reduces energy utilization efficiency. Cement needs to be dehydrated during the grinding process. The flue gas in the cement kiln can be used as a heat source for drying, which saves heat source in cement grinding equipment, saves enterprise costs, and reduces waste heat emissions, thereby further improving resource utilization efficiency.

[0003] At present, in the process of discharging the flue gas in the kiln head to the grinding equipment, since the flow rate of the flue gas cannot be controlled, it is easy to cause the raw materials in the grinding equipment to overheat and produce scaling, or cause excessive temperature loss in the cement kiln, resulting in reduced production efficiency of the cement kiln. Therefore, a hot air recovery pipeline that can control the hot air volume of hot air recovered from the rotary kiln is proposed. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a hot air recovery duct for a rotary kiln, which can solve the technical problem of controlling the air intake volume of the hot air recovery duct.

[0005] The embodiment of the present application provides a hot air recovery pipeline of a rotary kiln, comprising a recovery pipeline, the recovery pipeline comprising an air intake portion, a conveying portion and an exhaust portion, the air intake portion being provided with a control component for controlling the flow rate of flue gas;

[0006] The control component includes a first valve plate, a second valve plate, a first gear, a second gear and a motor. The first valve plate and the second valve plate are respectively rotatably arranged in the middle of the air inlet part. Both ends of the first valve plate and the second valve plate respectively pass through the outer wall of the air inlet part. One end of the first valve plate is fixedly connected to the first gear, the other end of the first valve plate is connected to the motor, one end of the second valve plate is connected to the second gear, and the first gear is meshed with the second gear.

[0007] Furthermore, an angle scale is provided on the outer wall of the air inlet portion, a first pointer is fixedly provided on one end of the first valve plate, and a second pointer is fixedly provided on one end of the second valve plate.

[0008] Furthermore, a filter assembly is provided in the conveying part, and the filter assembly includes a filter plate and a particle collection box. The filter plate is inserted in the conveying part, the particle collection box is connected to the bottom of the conveying part, and the particle collection box is fixed to the bottom of the conveying part by bolts.

[0009] Furthermore, a transparent observation strip is provided on the particle collection box.

[0010] Furthermore, a blower is provided on one side of the filter plate. The blower is fixedly provided on the outer wall of the conveying portion, and an air outlet end of the blower is inclined toward the filter plate.

[0011] Furthermore, the conveying part is also provided with a closing component, which includes a sealing plate and two cylinders. The sealing plate is slidably arranged on the conveying part, and the two cylinders are fixedly arranged on both sides of the conveying part, and the two cylinders are respectively connected to both sides of the sealing plate.

[0012] Beneficial effects of the utility model:

[0013] The control assembly provided by the utility model drives the first valve plate and the second valve plate to rotate relative to each other through the drive of the motor, thereby controlling the flow area of ​​the air inlet to control the flow rate of the flue gas, thereby ensuring the temperature stability in the cement kiln and the temperature state of the powder in the grinder.

[0014] The setting of the filter component can effectively screen and collect large particles in the flue gas, preventing the raw materials in the grinding equipment from reacting with the particles in the flue gas and affecting the grinding quality of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of an embodiment of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of a control component of an embodiment of the utility model;

[0019] Figure 4 for Figure 1Schematic diagram of the enlarged structure at A.

[0020] The reference numerals are:

[0021] 1. Recovery pipe; 11. Air intake; 111. Angle scale; 12. Conveying section; 13. Exhaust section; 2. Control assembly; 21. First valve plate; 211. First pointer; 22. Second valve plate; 221. Second pointer; 23. First gear; 24. Second gear; 25. Motor; 3. Filter assembly; 31. Filter plate; 32. Particle collection box; 321. Observation strip; 33. Blower; 4. Closing assembly; 41. Sealing plate; 42. Cylinder. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0028] The embodiment of the present application discloses a hot air recovery pipeline of a rotary kiln.

[0029] Reference Figure 1-4 A hot air recovery pipeline for a rotary kiln comprises a recovery pipeline 1, the recovery pipeline 1 comprises an air intake portion 11, a conveying portion 12 and an exhaust portion 13, and a control component 2 for controlling the flow rate of flue gas is arranged in the air intake portion 11;

[0030] The control assembly 2 includes a first valve plate 21, a second valve plate 22, a first gear 23, a second gear 24 and a motor 25. The first valve plate 21 and the second valve plate 22 are rotatably arranged in the middle of the air inlet portion 11, respectively. Both ends of the first valve plate 21 and the second valve plate 22 respectively penetrate the outer wall of the air inlet portion 11. One end of the first valve plate 21 is fixedly connected to the first gear 23, one end of the second valve plate 22 is connected to the second gear 24, the first gear 23 is meshed with the second gear 24, and the other end of the first valve plate 21 is connected to the motor 25.

[0031] During use, when the temperature in the kiln is too low or the temperature in the grinder is too high, the motor 25 drives the first valve plate 21 to rotate, and the rotation of the first valve plate 21 drives the first gear 23 at the other end to rotate, the first gear 23 engages with the second gear 24, and causes the second valve plate 22 to rotate at the same time, so that the first valve plate 21 and the second valve plate 22 can be flipped relative to each other, and the air intake flow area of ​​the air intake part 11 can be controlled, and then the flow area of ​​the air intake part 11 can be controlled to control the flow rate of the flue gas, thereby ensuring the temperature stability in the cement kiln and the temperature state of the powder in the grinder.

[0032] Reference Figure 1 , Figure 4An angle scale 111 is provided on the outer wall of the air inlet portion 11, a first pointer 211 is fixedly provided at the outermost part of the rotating end of the first valve plate 21, and a second pointer 221 is fixedly provided at the outermost part of the rotating end of the second valve plate 22. When in use, the first pointer 211 and the second pointer 221 can be used to effectively observe the rotation states of the first valve plate 21 and the second valve plate 22, and the size of the flowable area in the air inlet portion 11 can be accurately seen.

[0033] Reference Figure 2 A filter assembly 3 is arranged in the conveying part 12, and the filter assembly 3 includes a filter plate 31 and a particle collection box 32. The filter plate 31 is inserted in the conveying part 12, and after the filter plate 31 is fixed, the filter plate 31 is fixed in the conveying part 12 by bolts or the like. The particle collection box 32 is connected to the bottom of the conveying part 12, and the particle collection box 32 is fixed at the bottom of the conveying part 12 by bolts. When in use, the filter plate 31 is inserted into the conveying part 12 to filter the flue gas to prevent the raw materials in the grinding equipment from reacting with the particles in the flue gas and affecting the grinding quality of the raw materials. The filtered dust particles fall into the particle collection box 32 for collection.

[0034] Reference Figure 1 A transparent observation strip 321 is provided on the particle collection box 32, which is convenient for directly observing the collection and storage status of the particles in the particle collection box 32, and cleaning the particles in time to avoid affecting the smoke conveying efficiency of the pipeline.

[0035] Reference Figure 1-2 A blower 33 is also provided on one side of the filter plate 31. The blower 33 is fixedly arranged on the outer wall of the conveying part 12. The air outlet end of the blower 33 is inclined toward the filter plate 31. When in use, the blower 33 is used to pressurize and blow air toward the filter plate 31, which can effectively blow off the larger dust particles stuck on the filter plate 31 in the opposite direction and drop them into the powder bin particle collection box 32, thereby effectively cleaning the filter plate 31.

[0036] Reference Figure 1-2 The conveying part 12 is also provided with a closing component 4, which includes a sealing plate 41 and two cylinders 42. The sealing plate 41 is slidably arranged on the conveying part 12, and the two cylinders 42 are fixedly arranged on both sides of the conveying part 12, and the two cylinders 42 are respectively connected to the two sides of the sealing plate 41. When in use, when it is necessary to immediately cut off the pipeline and temporarily stop the supply of flue gas, the cylinder 42 drives the sealing plate 41 to slide downward to cut off the conveying part 12. At the same time, after the cutoff, the particle collection box 32 can be immediately disassembled and discharged.

[0037] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hot air recovery pipeline for a rotary kiln, characterized in that: The recovery pipeline includes an air intake portion, a conveying portion, and an exhaust portion, wherein a control component for controlling the flow rate of flue gas is arranged in the air intake portion; The control component includes a first valve plate, a second valve plate, a first gear, a second gear and a motor. The first valve plate and the second valve plate are respectively rotatably arranged in the middle of the air inlet part. Both ends of the first valve plate and the second valve plate respectively pass through the outer wall of the air inlet part. One end of the first valve plate is fixedly connected to the first gear, the other end of the first valve plate is connected to the motor, one end of the second valve plate is connected to the second gear, and the first gear is meshed with the second gear.

2. The hot air recovery pipeline of a rotary kiln according to claim 1, characterized in that: An angle scale is arranged on the outer wall of the air inlet portion, a first pointer is fixedly arranged on one end of the first valve plate, and a second pointer is fixedly arranged on one end of the second valve plate.

3. The hot air recovery pipeline of a rotary kiln according to claim 1, characterized in that: A filter assembly is arranged in the conveying part, and the filter assembly includes a filter plate and a particle collection box. The filter plate is inserted in the conveying part, the particle collection box is connected to the bottom of the conveying part, and the particle collection box is fixed to the bottom of the conveying part by bolts.

4. The hot air recovery pipeline of a rotary kiln according to claim 3, characterized in that: The particle collection box is provided with a transparent observation strip.

5. The hot air recovery pipeline of a rotary kiln according to claim 3, characterized in that: A blower is also provided on one side of the filter plate. The blower is fixedly provided on the outer wall of the conveying portion, and an air outlet end of the blower is inclined toward the filter plate.

6. The hot air recovery pipeline of a rotary kiln according to claim 1, characterized in that: The conveying part is also provided with a closing component, which includes a sealing plate and two cylinders. The sealing plate is slidably arranged on the conveying part, and the two cylinders are fixedly arranged on both sides of the conveying part, and the two cylinders are respectively connected to both sides of the sealing plate.

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