Waste heat recovery device for preheating raw materials

Abstract

The waste heat recovery device comprises a cyclone preheating cylinder and a knocking assembly, an air inlet pipe is arranged on one side of the cyclone preheating cylinder in the tangential direction, the upper portion of the air inlet pipe is communicated with a feeding pipe, an air outlet is formed in the top of the cyclone preheating cylinder, and a discharging pipe is arranged at the bottom of the cyclone preheating cylinder. The knocking assembly comprises a rack, a knocking rod hinged to the rack and a pressure spring fixed between the rack and the knocking rod, a driving assembly used for driving the knocking rod to rotate is installed on the rack, hot air exhausted from the cement kiln can be introduced into the cyclone preheating cylinder through the air inlet pipe, and meanwhile raw materials to be preheated can be pumped into the air inlet pipe through the feeding pipe; the raw material enters the cyclone preheating cylinder along with the gas, spirally flows along the inner wall of the cyclone preheating cylinder and is finally discharged from the discharge port, and the hot gas is discharged from the gas outlet after being filtered; and then the knocking rod can be driven to rotate in a reciprocating mode through the driving assembly, the compression spring is compressed or released, then the outer wall of the cyclone preheating cylinder is knocked in a reciprocating mode, and the powder is prevented from being attached to the inner wall of the cyclone preheating cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of raw material preheating, in particular to a waste heat recovery device for raw material preheating. Background Art

[0002] Cement is a building material, a powdery hydraulic inorganic binder. After being mixed with water and stirred, it becomes a slurry, which can harden in the air or in water and can firmly bond materials such as sand and stone together.

[0003] In the production process of cement, there is a calcination process. A large amount of heat is generated during the calcination process. If this heat is not recovered and utilized, it will cause great waste. Generally, the heat generated by calcining cement clinker is recovered and given to the cyclone preheater system to preheat the cement raw material, reducing the heat and time required for the cement raw material to heat up in the rotary kiln, increasing the cement production efficiency and reducing costs. However, during the use of the cyclone cylinder in the cyclone preheater, the powdery cement raw material will adhere to the inner wall of the cyclone cylinder, which urgently needs to be improved. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a waste heat recovery device for raw material preheating, which is used to solve the problem that the powdery cement raw material will adhere to the inner wall of the cyclone cylinder during the preheating of the raw material by the existing waste heat recovery device for raw material preheating.

[0005] To solve the above problems, the utility model provides a waste heat recovery device for raw material preheating, which includes a cyclone preheating cylinder and a knocking component. An air inlet pipe is tangentially arranged on one side of the cyclone preheating cylinder. A feed pipe is communicated above the air inlet pipe. An air outlet is arranged at the top of the cyclone preheating cylinder. A discharge pipe is arranged at the bottom of the cyclone preheating cylinder. The knocking component includes a frame, a knocking rod hinged to the frame, and a compression spring fixed between the frame and the knocking rod. A driving component for driving the knocking rod to rotate is installed on the frame.

[0006] The waste heat recovery device for raw material preheating provided by the utility model also has the following technical features:

[0007] Further, a filter screen is clamped in the air outlet.

[0008] Further, the driving component includes a motor, a rope winding wheel fixedly connected to the output end of the motor, a guide wheel and a traction rope. One end of the traction rope bypasses the guide wheel, penetrates the frame and is fixedly connected to the rope winding wheel. The other end of the traction rope is fixedly connected to the end of the knocking rod far away from the cyclone preheating cylinder.

[0009] Further, the knocking rod includes a rotating rod hinged to the frame and a collision rod fixedly connected to the rotating rod.

[0010] Furthermore, a collision plate corresponding to the collision rod is fixedly arranged on the outer wall of the cyclone preheater in an inclined manner.

[0011] Furthermore, the type of the motor is an AC motor.

[0012] The utility model has the following beneficial effects: hot gas discharged from a cement kiln can be introduced into the cyclone preheater through the air inlet pipe, and at the same time, raw meal to be preheated can be pumped into the air inlet pipe through the feed pipe. The raw meal enters the cyclone preheater together with the gas and spirally flows along the inner wall of the cyclone preheater and finally is discharged from the discharge port, while the hot gas is discharged from the air outlet after being filtered; then, the driving assembly can drive the knocking rod to rotate reciprocally, the compression spring is compressed or released, so as to reciprocally knock the outer wall of the cyclone preheater and prevent powder from adhering to the inner wall of the cyclone preheater. Description of the Drawings

[0013] Figure 1 is the overall structural schematic diagram of the waste heat recovery device for preheating raw meal;

[0014] Figure 2 is Figure 1 the enlarged schematic diagram of the partial structure at A in Detailed Embodiments

[0015] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0016] As Figures 1 to 2 shown in the embodiment of a waste heat recovery device for preheating raw meal of the present utility model, it includes a cyclone preheater 1 and a knocking assembly 2. An air inlet pipe 101 is tangentially arranged on one side of the cyclone preheater 1. A feed pipe 102 is communicated above the air inlet pipe 101. An air outlet 103 is arranged at the top of the cyclone preheater 1. A discharge pipe 104 is arranged at the bottom of the cyclone preheater 1. The knocking assembly 2 includes a frame 21, a knocking rod 22 hinged to the frame 21, and a compression spring 23 fixed between the frame 21 and the knocking rod 22. A driving assembly 3 for driving the knocking rod to rotate is installed on the frame 21. Specifically, hot gas discharged from a cement kiln can be introduced into the cyclone preheater 1 through the air inlet pipe, and at the same time, raw meal to be preheated can be pumped into the air inlet pipe 101 through the feed pipe 102. The raw meal enters the cyclone preheater 1 together with the gas and spirally flows along the inner wall of the cyclone preheater 1 and finally is discharged from the discharge port 104, while the hot gas is discharged from the air outlet 103 after being filtered; then, the driving assembly 3 can drive the knocking rod 22 to rotate reciprocally, the compression spring 23 is compressed or released, so as to reciprocally knock the outer wall of the cyclone preheater 1 and prevent powder from adhering to the inner wall of the cyclone preheater 1.

[0017] In one embodiment of the present application, a filter screen 4 is clamped inside the air outlet 103.

[0018] In one embodiment of the present application, the driving assembly 3 includes a motor 31, a rope winding wheel 32 fixedly connected to the output end of the motor 31, a guide wheel 33, and a traction rope 34. One end of the traction rope 34 bypasses the guide wheel 33, penetrates the frame 21, and is fixedly connected to the rope winding wheel 32. The other end of the traction rope 34 is fixedly connected to the end of the knocking rod 22 away from the cyclone preheater 1. Specifically, when the motor 31 rotates forward, the motor 31 drives the rope winding wheel 32 to rotate. The rope winding wheel 32 makes the knocking rod 22 rotate counterclockwise by winding the traction rope 34, and the compression spring 23 is compressed. The outer wall of the cyclone preheater 1 can be impacted by the knocking rod 22. When the motor 31 rotates in reverse, the knocking rod 22 resets. In this way, the outer wall of the cyclone preheater 1 is reciprocally knocked to avoid powder adhesion.

[0019] In one embodiment of the present application, the knocking rod 22 includes a rotating rod 220 hinged to the frame 21 and a collision rod 221 fixedly connected to the rotating rod 220.

[0020] In one embodiment of the present application, a collision plate 222 corresponding to the collision rod 221 is fixedly arranged obliquely on the outer wall of the cyclone preheater 1. Specifically, when the rotating rod rotates, the collision plate 222 can be knocked by the collision rod 221. Since the collision plate 222 is integrally and fixedly connected to the cyclone preheater 1, the collision plate 222 resonates with the cyclone preheater 1, effectively avoiding powder adhesion on the inner wall of the cyclone preheater 1.

[0021] In one embodiment of the present application, the type of the motor 31 is an AC motor.

[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A waste heat recovery device for raw meal preheating, characterized in that: It includes a cyclone preheating cylinder and a knocking assembly, wherein an air inlet pipe is tangentially arranged on one side of the cyclone preheating cylinder, a feed pipe is connected to the top of the air inlet pipe, an air outlet is arranged on the top of the cyclone preheating cylinder, and a discharge pipe is arranged on the bottom of the cyclone preheating cylinder, the knocking assembly includes a frame, a knocking rod hinged on the frame, and a compression spring fixed between the frame and the knocking rod, and a driving assembly for driving the knocking rod to rotate is installed on the frame.

2. The waste heat recovery device for raw meal preheating according to claim 1, characterized in that: A filter screen is provided inside the air outlet.

3. The waste heat recovery device for raw meal preheating according to claim 2, characterized in that: The driving assembly includes a motor, a rope reel fixedly connected to the output end of the motor, a guide wheel and a traction rope, one end of the traction rope passes over the guide wheel, passes through the frame and is fixedly connected to the rope reel, and the other end of the traction rope is fixedly connected to an end of the knocking rod away from the cyclone preheating cylinder.

4. The device for recovering the waste heat for preheating raw meal according to claim 1, characterized in that: The knocking rod comprises a rotating rod hinged to the frame and a collision rod fixedly connected to the rotating rod.

5. The device for recovering the waste heat for preheating raw meal according to claim 4, characterized in that: The outer wall of the cyclone preheating cylinder is obliquely and fixedly provided with a collision plate corresponding to the collision rod.

6. The device for recovering the waste heat for preheating raw meal according to claim 3, characterized in that: The type of the motor is an AC motor.

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