Magnesite calcining system

Abstract

The utility model relates to a magnesite calcining system, which comprises a feeding device, a vertical preheater, a rotary kiln, a cylindrical cooler, a dust remover and a fan, the discharge end of the feeding device is positioned above the inlet of the vertical preheater, the outlet of the vertical preheater is connected with the rotary kiln, a burner is arranged at the kiln head of the rotary kiln, and the cylindrical cooler is connected with the rotary kiln. An outlet of the rotary kiln is connected with an inlet of the cylindrical cooler, an inlet of the dust remover is communicated with a smoke port of the vertical preheater, an outlet of the dust remover is connected with an inlet of the fan, and an outlet of the fan is connected with the chimney. According to the utility model, the vertical preheater is adopted, the pressure loss is low, and the air distribution is uniform, so that the preheating efficiency is high, the power consumption of the system is low, the decomposition rate of preheated magnesite raw materials entering a kiln is high, the small-particle-size magnesite raw materials of 10-50mm can be calcined, proper pressure and stroke of the hydraulic push rod can be determined according to different feeding particle sizes of the magnesite raw materials, the material pushing balance is ensured, and the energy consumption is low. The resource utilization rate is improved; and a cylindrical cooler is selected, so that the cooling effect is better.

Description

Technical Field

[0001] This utility model relates to the field of magnesite calcination technology, specifically to a magnesite calcination system. Background Technology

[0002] The magnesite industry has gradually shifted from primarily selling raw ore to developing new magnesite products such as magnesia refractories, magnesia chemicals, magnesia building materials, and magnesia alloys. Among these, light-burned magnesia used in magnesia building materials is produced in light-burning reverberatory kilns (vertical kilns), resulting in poor product quality, a limited range of raw material particle sizes, and high energy consumption.

[0003] Therefore, this application proposes a magnesite calcination system. Utility Model Content

[0004] To address the problems of high energy consumption and poor product quality in existing magnesite calcination technologies, this utility model proposes a magnesite calcination system, the specific technical solution of which is as follows:

[0005] A magnesite calcination system includes a feeding device, a vertical preheater, a rotary kiln, a cylindrical cooler, a dust collector, and a fan. The discharge end of the feeding device is located above the inlet of the vertical preheater. The outlet of the vertical preheater is connected to the rotary kiln. A burner is arranged at the kiln head of the rotary kiln. The outlet of the rotary kiln is connected to the inlet of the cylindrical cooler. The inlet of the dust collector is connected to the flue gas outlet of the vertical preheater. The outlet of the dust collector is connected to the inlet of the fan. The outlet of the fan is connected to the chimney.

[0006] Furthermore, the feeding device consists of a vibrating screen and a belt conveyor, with the discharge end of the belt conveyor located above the inlet of the vertical preheater.

[0007] Furthermore, the structure of the cylindrical cooler can be single-cylinder or multi-cylinder.

[0008] Furthermore, a cold air valve is also installed on the connecting pipeline between the dust collector and the vertical preheater.

[0009] Furthermore, the rotary kiln is supported by floating supports, and the kiln head and kiln tail seals are built-in fish scale structures. The main drive motor of the rotary kiln is an AC variable frequency speed control motor.

[0010] Furthermore, the burner is a multi-channel burner.

[0011] The beneficial effects of this utility model are as follows:

[0012] A vertical preheater is selected, which has low pressure loss and uniform air distribution, resulting in high preheating efficiency and low system power consumption. The preheated magnesite raw material has a high decomposition rate before entering the kiln, and can calcine small-particle magnesite raw material of 10-50mm. The appropriate hydraulic push rod pressure and stroke are determined according to the different particle sizes of the magnesite raw material to ensure balanced feeding and improve resource utilization. A cylindrical cooler is selected for better cooling effect. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the magnesite calcination system described in this utility model.

[0015] In the diagram: 1. Feeding device; 2. Vertical preheater; 3. Rotary kiln; 4. Burner; 5. Cooler; 6. Dust collector; 7. Fan; 8. Cold air valve. Detailed Implementation

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0017] The present invention provides the following specific implementation scheme:

[0018] like Figure 1As shown, this utility model provides a magnesite calcination system, including a feeding device 1, a vertical preheater 2, a rotary kiln 3, a cylindrical cooler 5, a dust collector 6, and a fan 7. The discharge end of the feeding device 1 is located above the inlet of the vertical preheater 2. The outlet of the vertical preheater 2 is connected to the rotary kiln 3. A burner 4 is arranged at the kiln head of the rotary kiln 3. The outlet of the rotary kiln 3 is connected to the inlet of the cylindrical cooler 5. The inlet of the dust collector 6 is connected to the flue gas outlet of the vertical preheater 2. The outlet of the dust collector 6 is connected to the inlet of the fan 7. The outlet of the fan 7 is connected to the chimney. The fan 7 draws out the dust generated in the vertical preheater 2 and discharges it through the chimney.

[0019] Preferably, the feeding device 1 is a vibrating screen and a belt conveyor. The discharge end of the belt conveyor is located above the inlet of the vertical preheater 2. After the vibrating screen screens the material, it is conveyed to the vertical preheater 2 by the belt conveyor.

[0020] Preferably, the vertical preheater 2 is a low-pressure-loss compartmentalized vertical preheater 2 with push rods, and its inner lining is a refractory material layer.

[0021] Preferably, the cylindrical cooler 5 is a single-cylinder or multi-cylinder type, which makes the cooling more uniform and the effect better.

[0022] Preferably, a cold air valve 8 is also provided on the connecting pipe between the dust collector 6 and the vertical preheater 2 to reduce the temperature of the discharged smoke and dust.

[0023] Preferably, the rotary kiln 3 has a floating support, and the kiln head and kiln tail seals of the rotary kiln 3 have an internal fish scale structure, thereby reducing the transmission power of the rotary kiln 3, reducing the air leakage coefficient of the rotary kiln 3, and reducing heat loss. In addition, the main drive motor of the rotary kiln 3 adopts an AC variable frequency speed control motor, which saves energy and makes speed adjustment very convenient and stable, resulting in smooth transmission.

[0024] Preferably, burner 4 is a multi-channel burner, which reduces the primary air volume and has high combustion efficiency, thereby reducing the heat consumption of magnesite calcination.

[0025] A vertical preheater 2 is selected, which has low pressure loss and uniform air distribution, resulting in high preheating efficiency and low system power consumption. The preheated magnesite raw material has a high decomposition rate before entering the kiln, allowing for the calcination of small-particle magnesite raw materials of 10-50mm. The appropriate hydraulic pusher pressure and stroke are determined according to the different particle sizes of the magnesite raw material feed to ensure balanced feeding and improve resource utilization. A cylindrical cooler 5 is selected for better cooling effect. Calcination of magnesite using the calcination system described in this application can improve the utilization rate of magnesite raw materials, with low heat consumption and high resource utilization, which is both a protection of the human living environment and a full embodiment of the rational use of resources.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A magnesite calcination system, characterized by: It comprises a feeding device (1), a vertical preheater (2), a rotary kiln (3), a cylinder cooler (5), a dust collector (6) and a fan (7), the discharge end of the feeding device (1) is located above the inlet of the vertical preheater (2), the outlet of the vertical preheater (2) is connected with the rotary kiln (3), a burner (4) is arranged at the kiln head of the rotary kiln (3), the outlet of the rotary kiln (3) is connected with the inlet of the cylinder cooler (5), the inlet of the dust collector (6) is communicated with the flue gas port of the vertical preheater (2), the outlet of the dust collector (6) is connected with the inlet of the fan (7), and the outlet of the fan (7) is connected with a chimney.

2. A magnesite calcination system according to claim 1, characterized in that: The feeding device (1) is a vibrating screen and a belt conveyor, and the discharge end of the belt conveyor is located above the inlet of the vertical preheater (2).

3. A magnesite calcination system according to claim 1, characterized in that: The structure of the cylinder cooler (5) is single-cylinder or multi-cylinder.

4. The magnesite calcining system of claim 1, wherein: A cold air valve (8) is further arranged on the connecting pipeline between the dust collector (6) and the vertical preheater (2).

5. A magnesite calcination system according to claim 1, characterized in that: The rotary kiln (3) is floatingly supported, the kiln head and the kiln tail of the rotary kiln (3) are sealed by an internal fish scale structure, and an AC variable frequency speed regulating motor is adopted for the main transmission motor of the rotary kiln (3).

6. A magnesite calcination system according to claim 1, characterized in that: The burner (4) is a multi-channel burner.

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