Feeding structure of cement kiln decomposing furnace

Abstract

The utility model relates to the field of cement production equipment, in particular to a cement kiln decomposing furnace feeding structure which comprises a feeding pipe, an air duct and a discharging pipe which are sequentially communicated, the discharging pipe is communicated with a decomposing furnace, the side wall of the air duct is communicated with an air blowing pipe, the air blowing direction of the air blowing pipe faces the discharging pipe, and the air blowing pipe is communicated with the discharging pipe. The upper portion of the feeding pipe is communicated with a communicating pipe, a buffering material tank is arranged at the end, away from the feeding pipe, of the communicating pipe, a rotating rod is arranged in the communicating pipe, a spiral blade is arranged on the rotating rod, and a driving piece for driving the rotating rod to rotate is arranged on the buffering tank. And a material conveying pipe is communicated between the bottom of the buffer material tank and the side wall of the air duct, and a valve is arranged on the material conveying pipe. The raw material feeding device has the technical effect of quickly and conveniently adjusting the raw material feeding amount.

Description

Technical Field

[0001] The present application relates to the field of cement production equipment, and in particular to a cement kiln decomposition furnace feeding structure. Background Art

[0002] The calciner is the core and key equipment of the cement production system. It is a new type of thermal equipment that simultaneously carries out fuel combustion, heat exchange and decomposition reaction. It has many types and forms. The basic principle is: the preheated raw meal, a certain amount of fuel and an appropriate amount of hot gas are fed into the calciner at the same time, and the raw meal is suspended or boiling in the furnace; below 900C, the fuel is flameless combustion, and the heat transfer and calcium carbonate decomposition process are completed at high speed.

[0003] The decomposition rate of raw materials in the decomposition furnace should be controlled within the range of 90-95%. If the decomposition rate is too low, the decomposition furnace will not be fully utilized, and the burden on the kiln will be increased, which is not conducive to increasing production and energy saving. However, if the decomposition rate is too high, the remaining less than 5-10% of calcium carbonate will also be decomposed in the decomposition furnace, and an exothermic reaction of cement silicate minerals may occur immediately, and finally a catastrophic sintering blockage will occur in the decomposition furnace. The decomposition of raw materials in the decomposition furnace starts at 600-700℃, and the decomposition speed is significantly accelerated at 800℃. At about 900℃, the raw materials will decompose rapidly. When the temperature in the decomposition furnace is low, the raw material feeding speed will cause the temperature in the decomposition furnace to be low, and the raw material decomposition rate will not meet the requirements. When the raw material feeding speed is slow, the temperature in the decomposition furnace will be high, and the raw material decomposition rate is too high to cause sintering blockage. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a cement kiln decomposition furnace feeding structure, which can adjust the technical problem of raw material feeding speed.

[0005] The embodiment of the present application provides a cement kiln decomposition furnace feeding structure adopting the following technical solution:

[0006] A cement kiln decomposition furnace feeding structure comprises a feed pipe, a wind tube and a discharge pipe which are connected in sequence, the discharge pipe is connected to the decomposition furnace, the side wall of the wind tube is connected to a blowing pipe, the blowing direction of the blowing pipe is toward the discharge pipe, the upper part of the feed pipe is connected to a connecting pipe, a buffer material tank is provided at one end of the connecting pipe away from the feed pipe, a rotating rod is provided in the connecting pipe, a spiral blade is provided on the rotating rod, a driving member for driving the rotating rod to rotate is provided on the buffer material tank, a delivery pipe is connected between the bottom of the buffer material tank and the side wall of the wind tube, and a valve is provided on the delivery pipe.

[0007] Furthermore, the driving member includes a driving motor disposed on the buffer tank, and an output shaft of the driving motor is coaxially connected to the rotating rod.

[0008] Furthermore, both ends of the air duct are provided with a cone portion, the large end of the cone portion is connected to the air duct, and the small ends of the cone portion at both ends of the air duct are respectively connected to the feed pipe and the discharge pipe.

[0009] Furthermore, a material guide pipe is arranged in the vertebral body connected to the feed pipe, and the material guide pipe is arranged in a trumpet shape, with the large end of the material guide pipe facing the feed pipe and the small end of the material guide pipe facing the discharge pipe.

[0010] Furthermore, a raw material height sensor is provided in the buffer material tank.

[0011] Furthermore, the side wall of the buffer tank is connected to a discharge pipe, and a discharge valve is provided on the discharge pipe.

[0012] Furthermore, both ends of the feed pipe are provided with feed flanges, both ends of the discharge pipe are provided with discharge flanges, and both ends of the wind tube are provided with connecting flanges. The two connecting flanges at both ends of the wind tube are fixedly connected to the feed flange and the discharge flange respectively.

[0013] Beneficial effects of the utility model:

[0014] The feeding structure provided by the utility model is that when the temperature in the decomposition furnace is low, the driving motor works to transport a part of the raw material in the feeding pipe to the buffer material tank, thereby reducing the raw material feeding amount. When the temperature in the decomposition furnace reaches the requirement, the driving motor stops working; when the temperature in the decomposition furnace is high, the valve is opened to increase the raw material feeding amount and lower the temperature in the decomposition furnace, thereby realizing fast and convenient adjustment of the raw material feeding amount. 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 overall structure of an embodiment of the utility model;

[0017] Figure 2 It is a front schematic diagram of an embodiment of the utility model;

[0018] Figure 3 A cross-sectional schematic diagram of an embodiment of the utility model;

[0019] The reference numerals are as follows: 1, feed pipe; 11, feed flange; 11, fixing flange; 2, air duct; 21, air blowing pipe; 22, guide pipe; 23, connecting flange; 24, fastening flange; 3, discharge pipe; 31, feed flange; 4, buffer tank; 41, feed pipe; 411, valve; 42, valve; 43, discharge pipe; 431, discharge valve; 44, connecting pipe; 45, driving motor; 5, rotating rod; 51, spiral blade; DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] The present application embodiment discloses a cement kiln decomposition furnace feeding structure, referring to Figure 1-3 , including a feed pipe 1, a wind tube 2 and a discharge pipe 3, one end of the feed pipe 1 is connected to one end of the wind tube 2, one end of the discharge pipe 3 is connected to the other end of the wind tube 2, and the other end of the discharge pipe 3 is connected to the decomposition furnace, the diameter of the wind tube 2 is larger than the diameters of the feed pipe 1 and the discharge pipe 3, and, in order to make the wind tube 2 more smoothly connected to the feed pipe 1 and the discharge pipe 3, both ends of the wind tube 2 are integrally formed with a vertebral body, the large end of the vertebral body is connected to the wind tube 2, and the small ends of the two vertebral bodies at both ends of the wind tube are respectively connected to the feed pipe 1 and the discharge pipe 3.

[0027] At the same time, feed flanges 3111 are welded to the outer circumferences of both ends of the feed pipe 1, discharge flanges are welded to the outer circumferences of both ends of the discharge pipe 3, and connecting flanges 23 are welded to the outer circumferences of the vertebral bodies at both ends of the air duct 2. The connecting flange 23 at one end of the air duct 2 fits with the feed flange 3111 at one end of the feed pipe 1 and is fixedly connected by bolts, and the connecting flange 23 at the other end of the air duct 2 fits with the discharge flange at one end of the discharge pipe 3 and is fixedly connected by bolts.

[0028] In addition, the side wall of the wind tube 2 is connected to a blowing pipe 21, one end of the blowing pipe 21 away from the wind tube 2 is connected to the fan, the blowing pipe 21 is inclined to the wind tube 2, and the blowing direction of the blowing pipe 21 is toward the discharge pipe 3. When the raw material enters the wind tube 2 from the feed pipe 1, the blowing pipe 21 blows air into the wind tube 2, the airflow blows the raw material away, and at the same time blows the raw material toward the discharge pipe 3, so that the raw material enters the decomposition furnace. At the same time, a material guide pipe 22 is arranged in the vertebral body connected to the feed pipe 1. The material guide pipe 22 is arranged in a trumpet shape. The large end of the material guide pipe 22 is welded to the inner wall of the vertebral body. The material guide pipe 22 is arranged in the same direction as the wind tube 2. The large end of the material guide pipe 22 faces the feed pipe 1, and the small end of the material guide pipe 22 faces the discharge pipe 3. When the raw material enters the wind tube 2 from the feed pipe 1, the raw material will not directly enter the wind tube 2 along the inner wall of the vertebral body of the wind tube 2, but will fall into the wind tube 2 after passing through the guide pipe, and then be blown away by the airflow, so that the raw material can be better delivered to the decomposition furnace.

[0029] At the same time, the upper part of the feed pipe 1 is connected with a connecting pipe 44, one end of the connecting pipe 44 and the upper part of the feed pipe 1 are welded with a fixing flange 11, the feed pipe 1 and the fixing flange 11 of the connecting pipe 44 are fitted and fixedly connected by bolts, and a buffer tank 4 is provided at one end of the connecting pipe 44 away from the feed pipe 1, and the buffer tank 4 is located above the feed pipe 1 and the wind tube 2. At the same time, a rotating rod 5 is provided in the same direction in the connecting pipe 44, and a spiral blade 51 is welded on the rotating rod 5, and a part of the spiral blade 51 extends into the feed pipe 1, and a driving member for driving the rotating rod 5 to rotate is provided on the buffer tank 4. Specifically, The driving part includes a driving motor 45 fixedly installed on the top of the buffer tank 4 in the vertical direction. The output shaft of the driving motor 45 extends to the buffer tank 4 and is coaxially fixedly connected to the rotating rod 5. When the temperature in the decomposition furnace is low and the raw material feed amount needs to be reduced, the driving motor 45 drives the rotating rod 5 and the spiral blade 51 to rotate. The spiral blade 51 transports a part of the raw material in the feed pipe 1 to the buffer tank 4 through the connecting pipe 44, thereby reducing the raw material entering the air duct 2 through the feed pipe 1 and reducing the raw material feed amount. When the temperature in the decomposition furnace reaches the requirement, the driving motor 45 stops working.

[0030] In addition, a feed pipe 41 is connected between the bottom of the buffer tank 4 and the side wall of the wind tube 2, and a valve 42411 is installed on the feed pipe 41. The valve 42411 is electromagnetically controlled. A fastening flange 24 is welded to one end of the feed pipe 41 and the side wall of the wind tube 2. The feed pipe 41 fits the fastening flange 24 of the wind tube 2 and is fixedly connected by bolts. When the temperature in the decomposition furnace is high, the valve 42411 opens, and the raw material enters the wind tube 2 from the buffer tank 4, and then enters the decomposition furnace, thereby increasing the feed amount of the raw material and lowering the temperature in the decomposition furnace. In addition, a raw material height sensor is installed in the buffer tank 4. The raw material height sensor can be an ultrasonic level meter or a laser level meter on the market. The raw material height sensor can monitor the raw material height in the buffer tank 4 in real time, thereby monitoring whether the raw material in the buffer tank 4 is full. At the same time, the side wall of the buffer material tank 4 is connected to a discharge pipe 43, on which a discharge valve 431 is installed. When the raw material in the buffer material tank 4 is full, the discharge valve 431 is opened to discharge a portion of the raw material from the buffer material tank 4 to prevent the raw material in the buffer material tank 4 from overflowing.

[0031] The implementation principle of a cement kiln decomposition furnace feeding structure of an embodiment of the present application is as follows: when the temperature in the decomposition furnace is low and the raw material feed amount needs to be reduced, the driving motor 45 works to drive the rotating rod 5 and the spiral blade 51 to rotate, and the spiral blade 51 conveys a portion of the raw material in the feed pipe 1 to the buffer material tank 4 through the connecting pipe 44, thereby reducing the raw material entering the air duct 2 through the feed pipe 1 and reducing the raw material feed amount. When the temperature in the decomposition furnace reaches the requirement, the driving motor 45 stops working; when the temperature in the decomposition furnace is high, the valve 42411 is opened, and the raw material enters the air duct 2 from the buffer material tank 4, and then enters the decomposition furnace, thereby increasing the raw material feed amount and lowering the temperature in the decomposition furnace, thereby realizing quick and convenient adjustment of the raw material feed amount.

[0032] 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 cement kiln calciner feeding structure, characterized in that: It includes a feed pipe, a blow pipe and a discharge pipe which are connected in sequence, the discharge pipe is connected to the decomposition furnace, the side wall of the blow pipe is connected to a blowing pipe, the blowing direction of the blowing pipe is toward the discharge pipe, the upper part of the feed pipe is connected to a connecting pipe, a buffer material tank is provided at one end of the connecting pipe away from the feed pipe, a rotating rod is provided in the connecting pipe, the rotating rod is provided with spiral blades, the buffer material tank is provided with a driving part for driving the rotating rod to rotate, a delivery pipe is connected between the bottom of the buffer material tank and the side wall of the blow pipe, and a valve is provided on the delivery pipe.

2. A cement kiln calciner feeding structure according to claim 1, characterized in that: The driving member includes a driving motor disposed on the buffer tank, and an output shaft of the driving motor is coaxially connected to the rotating rod.

3. A cement kiln calciner feeding structure according to claim 1, characterized in that: Both ends of the air duct are provided with a cone part, the large end of the cone part is connected to the air duct, and the small ends of the cone parts at both ends of the air duct are respectively connected to the feed pipe and the discharge pipe.

4. A cement kiln calciner feeding structure according to claim 2, characterized in that: A material guide pipe is arranged in the vertebral body connected to the feed pipe. The material guide pipe is arranged in a trumpet shape. The large end of the material guide pipe faces the feed pipe, and the small end of the material guide pipe faces the discharge pipe.

5. A cement kiln calciner feeding structure according to claim 1, characterized in that: A raw material height sensor is arranged in the buffer material tank.

6. A cement kiln calciner feeding structure according to claim 5, characterized in that: The side wall of the buffer tank is connected with a discharge pipe, and a discharge valve is arranged on the discharge pipe.

7. A cement kiln calciner feeding structure according to claim 1, characterized in that: Both ends of the feed pipe are provided with feed flanges, both ends of the discharge pipe are provided with discharge flanges, and both ends of the wind tube are provided with connecting flanges. The two connecting flanges at both ends of the wind tube are fixedly connected to the feed flange and the discharge flange respectively.

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