Light calcined magnesia roller cooler

Abstract

The utility model discloses a light calcined magnesia drum cooler which comprises a drum body, a feed port, a discharge port, a driving device, a heat preservation layer and the like. A locking and sealing part, a buffering part, a material turning part and a material raising part are arranged on the inner wall of the cylinder body, and the cooling effect and the energy utilization rate are improved through the design of specific structures and materials of all the parts; compared with the prior art, the light calcined magnesia roller cooler solves the problems that an existing light calcined magnesia roller cooler is poor in cooling effect, poor in sealing performance, complex in internal structure and the like. Through the measures of improving the structural design, improving the sealing performance, simplifying the internal structure and the like, the cooler disclosed by the utility model can improve the cooling effect, reduce the energy consumption, reduce the occurrence of faults, improve the production efficiency and provide better guarantee for the production of light calcined magnesia.

Description

Technical Field

[0001] The utility model belongs to the technical field of coolers, and specifically relates to a rotary cooler for light burned magnesia. Background Art

[0002] Light burned magnesia is an important chemical raw material, which is widely used in the fields of building materials, metallurgy, chemical industry, etc. During the production process of light burned magnesia, it is necessary to cool it to improve product quality and production efficiency. At present, the commonly used cooling equipment is a rotary cooler, whose cooling cylinder rotates along the cylinder axis, and several cooling air pipes are evenly distributed on the inner wall of the cylinder. Both ends of the cooling air pipes are respectively connected to the intake main pipe and the exhaust main pipe. After the light burned magnesia is cooled by the cooling cylinder, it is discharged by a sealing cover which is hermetically connected to the discharge end of the cooling cylinder. The compressed cold air inlet pipe is connected to the intake main pipe inside the sealing cover, and the inlet pipe needs to be inserted into the intake main pipe of the cooling cylinder.

[0003] However, the existing rotary coolers have the following problems:

[0004] Firstly, due to the unreasonable structural design of the rotary cooler, the cooling effect is poor and cannot meet the production requirements. Secondly, due to the poor sealing performance of the rotary cooler, a large amount of heat is dissipated during the cooling process, increasing energy consumption. In addition, due to the complex internal structure of the rotary cooler, it is prone to failures and difficult to repair, affecting production efficiency.

[0005] At the same time, due to the unreasonable structure of the cooler, it is easy to accumulate dust inside the cooler, affecting the heat exchange efficiency and increasing the equipment maintenance cost. In addition, due to the poor sealing performance of the cooler, it is easy for air to enter the cooler, affecting product quality.

[0006] Therefore, in order to solve the problems existing in the existing rotary cooler for light burned magnesia, it is necessary to improve and optimize it. Therefore, in order to solve the problems existing in the existing rotary cooler, it is necessary to improve and optimize it. By improving the structural design, enhancing the sealing performance, simplifying the internal structure and other measures, the cooling effect can be improved, energy consumption can be reduced, failures can be reduced, production efficiency can be improved, and better guarantee can be provided for the production of light burned magnesia. Summary of the Utility Model

[0007] The purpose of the utility model is to provide a rotary cooler for light burned magnesia, which fundamentally solves some technical problems existing in the actual application of the rotary cooler for light burned magnesia. Due to the relatively complex internal structure of the cooler, materials are prone to accumulation and blockage during the cooling process, which affects the cooling effect and reduces production efficiency.

[0008] In addition, since a large amount of heat is generated during the operation of the drum cooler, if the heat cannot be dissipated in a timely and effective manner, it will cause the equipment temperature to be too high, thus affecting its normal operation. Therefore, effective heat dissipation measures need to be taken to ensure the stable operation of the equipment.

[0009] In addition, since a negative pressure suspension furnace requires air to calcine magnesium oxide, heating the air requires additional consumption, resulting in waste of energy.

[0010] In summary, there are still some technical problems in the practical application of the light-burned magnesium oxide drum cooler, which need to be further improved and perfected.

[0011] To achieve the above object, the present utility model provides the following technical solutions:

[0012] A light-burned magnesium oxide drum cooler includes a cylinder body, a feed inlet, a discharge outlet, a driving device and a heat-insulating layer. The driving device controls the rotation of the drum cooler, and the heat-insulating layer is wrapped outside the cylinder body. The feed inlet is connected to the discharge port of the suspension furnace, the discharge outlet is connected to a sizing feeder, and the sizing feeder is connected to a blower. On the side of the inner wall of the cylinder body near the feed inlet, a sealing part, a buffer part and a turning part are arranged in sequence from left to right. A sealing plate is arranged on the inner wall of the sealing part, and the discharge port of the suspension furnace is connected to the drum cooler through the sealing plate. A spiral blade is arranged inside the sealing part. Fire bricks are pasted on the inner wall of the buffer part, and fire bricks with alternating heights are pasted on the inner wall of the turning part along the height direction and the circumferential direction of the cylinder body;

[0013] Further, a material lifting part is also arranged on the side of the cylinder body near the discharge outlet. A number of material lifting semi-rings are arranged on the inner wall of the material lifting part along the height direction and the circumferential direction of the cylinder body, and the material lifting semi-rings are arranged in a staggered manner along the height direction of the cylinder body;

[0014] Further, the material lifting semi-ring is of a double-layer iron plate structure, and aluminum silicate heat-insulating material is filled in the middle;

[0015] Further, the length ratio of the material lifting part to the turning part is 1:1;

[0016] Further, the length ratio of the buffer part to the turning part is 2:9;

[0017] Further, the height ratio of the fire bricks with alternating heights is 22:18;

[0018] Further, the material of the fire brick is bauxite, and the grade is LZ-55;

[0019] Further, the heat-insulating layer adopts aluminum silicate heat-insulating material.

[0020] The light-burned magnesium oxide drum cooler of the present utility model has the following advantages:

[0021] 1. Heat is fully utilized. Through the heat exchange between air and magnesium oxide, the heat generated during the cooling process is recycled, improving energy utilization efficiency and reducing production costs.

[0022] 2. High efficiency. The spiral channel and staggered semi-ring plate structure are adopted, and the material is constantly turned in the drum, making full contact with the cooling medium, thus improving the cooling efficiency.

[0023] 3. Simple structure. The light-burned magnesium oxide drum cooler of the present utility model has a simple structure and is easy to manufacture and maintain.

[0024] 4. Long service life. By further reducing the temperature of magnesium oxide through the semi-ring structure, the service life of each component can be extended.

[0025] Therefore, the light-burned magnesium oxide drum cooler has the advantages of sufficient heat exchange, high heat utilization, environmental protection, etc., and can bring good economic and social benefits to enterprises. Brief Description of the Drawings

[0026] Figure 1 It is the front view structural schematic diagram of the present utility model.

[0027] Figure 2 It is the sectional view taken along the line A-A of the material turning part of the present utility model.

[0028] Figure 3 It is the sectional view taken along the line B-B of the material lifting part of the present utility model. Detailed Description of the Preferred Embodiment

[0029] The following will be combined with Figures 1-3 , and the specific content of the present utility model will be described in detail through specific embodiments. The light-burned magnesium oxide drum cooler is a device for cooling light-burned magnesium oxide. It evenly distributes the material in the cylinder through the rotation of the drum, and at the same time uses the cooling medium air to cool the material. After the air is heated by the light-burned magnesium oxide, it enters the negative pressure suspension furnace, reducing the loss of furnace temperature. The following is a specific embodiment:

[0030] 1. Equipment Structure

[0031] A light-burned magnesia drum cooler, comprising a cylinder body 1, a feed inlet 2, a discharge outlet 3, a driving device and a heat-insulating layer 4. The driving device controls the rotation of the drum cooler. The heat-insulating layer 4 is wrapped around the outside of the cylinder body 1, and aluminosilicate heat-insulating material is filled in the heat-insulating layer. The feed inlet 2 is connected to the discharge port of the suspension furnace, and the discharge outlet 3 is connected to a sizing feeder. The sizing feeder is connected with a blower. The suspension furnace operates under full negative pressure and requires a certain amount of air supply, about 30,000 m³ / h. It enters the cylinder body 1 through the discharge outlet 3 of the light-burned magnesia drum cooler to exchange heat with magnesia. The hot air enters the suspension furnace through the feed inlet, which is equivalent to heating 30,000 m³ of air from normal temperature to 600 °C, reducing the energy consumption required for calcining materials. The finished light-burned magnesia drops from above 750 °C after calcination to below 300 °C. On the side of the inner wall of the cylinder body 1 close to the feed inlet, a seal part 11, a buffer part 12 and a turning part 13 are arranged in sequence from left to right. On the inner wall of the seal part 11, a seal plate 111 is provided. The discharge port of the suspension furnace is connected to the drum cooler through the seal plate. Inside the seal part 11, turning blades 112 are provided to disperse the magnesia entering the light-burned magnesia drum cooler, so that it can fully contact with air. On the inner wall of the buffer part 12, fire bricks 5 of the same size are pasted. The length of the buffer part 12 should not be too long, and its function is to make the magnesia continue to move towards the discharge outlet. On the inner wall of the turning part 13, fire bricks 5 of alternating high and low are pasted along the height direction and the circumferential direction of the cylinder body. Such a setting makes the alternating high and low gaps in the turning part 13 form a spiral channel, so that the magnesia can continue to fully contact with air and will not pile up. After testing, the ratio of the length of the buffer part 12 to the turning part 13 is 2:9, and the height ratio of the fire bricks of alternating high and low is 22:18, which can make the heat exchange efficiency between magnesia and air the highest. The fire bricks are made of bauxite LZ-55.

[0032] Since the magnesia cannot be cooled to about 200 °C by using a brick body channel to turn it over, a lifting part 14 is added between the turning part and the discharge outlet. On the inner wall of the lifting part 14, a number of lifting semi-rings 141 are arranged along the height direction and the circumferential direction of the cylinder body. The lifting semi-rings 141 are arranged alternately along the height direction of the cylinder body. The lifting semi-ring is a double-layer iron plate structure, and aluminosilicate heat-insulating material is filled in the middle. The semi-ring structure can increase the contact area with the material and accelerate the heat exchange between magnesia and air. In the temperature range of 200 °C - 300 °C, iron will gradually undergo an oxidation reaction and gradually lose its toughness. Through the internal aluminosilicate, the lifting semi-ring can work more stably. The ratio of the length of the lifting part to the turning part is preferably 1:1, which can make the magnesia at the discharge outlet drop to about 210 °C.

[0033] 2. Working principle

[0034] Materials enter the cylinder from the feed inlet. As the cylinder rotates, the materials are evenly distributed on the inner wall of the cylinder. Air enters the cylinder from the discharge outlet and conducts convective heat exchange with the materials, thereby cooling the materials. The heated hot air is supplemented into the negative pressure suspension furnace to participate in combustion, and the cooled materials are discharged from the discharge outlet to reach a lower temperature.

[0035] 3. Advantages of the Embodiment

[0036] The advantages of this embodiment mainly include the following aspects:

[0037] (1) The refractory bricks are arranged in a high-low distribution, which improves the cooling effect and reduces the cooling time of the materials.

[0038] (2) The heat insulation layer is provided, which reduces heat loss and improves energy utilization efficiency.

[0039] (3) The lifting plates are arranged in a ring shape, which further increases the contact area between the materials and the cooling medium, reduces the temperature of the discharged materials, and improves the cooling efficiency.

[0040] It should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

Claims

1. A lightly burned magnesia drum cooler, comprising a cylinder body (1), a feed inlet (2), a discharge outlet (3), a driving device and a heat insulation layer (4), wherein the driving device controls the rotation of the drum cooler, the heat insulation layer is wrapped outside the cylinder body, the feed inlet (2) is connected to the blanking port of a suspension furnace, the discharge outlet (3) is connected to a sizing feeder, and a blower is connected to the sizing feeder, and is characterized in that, On one side of the inner wall of the cylinder body near the feed inlet, a sealing part (11), a buffer part (12), and a material turning part (13) are successively arranged from left to right. A sealing plate (111) is arranged on the inner wall of the sealing part. The discharging port of the suspension furnace is connected to the drum cooler through the sealing plate (111). A material turning blade (112) is arranged inside the sealing part (11). Fire bricks (5) are pasted on the inner wall of the buffer part (12). Fire bricks (5) with alternating high and low heights are pasted on the inner wall of the material turning part along the height direction and the circumferential direction of the cylinder body.

2. The light-burned magnesia drum cooler according to claim 1, characterized in that, A material lifting part (14) is further arranged on one side of the cylinder body near the discharge outlet. A number of material lifting half rings (141) are arranged on the inner wall of the material lifting part (14) along the height direction and the circumferential direction of the cylinder body. The material lifting half rings are arranged in a staggered manner along the height direction of the cylinder body.

3. The light-burned magnesia drum cooler according to claim 2, characterized in that, The material lifting half ring (141) has a double-layer iron plate structure, and aluminum silicate heat-insulating material is filled in the middle.

4. The lightly burned magnesia drum cooler according to claim 2, wherein The length ratio of the material lifting part (14) to the material turning part (13) is 1:

1.

5. The light-burned magnesia drum cooler according to claim 1, characterized in that The length ratio of the buffer part (12) to the material turning part (13) is 2:

9.

6. The light-burned magnesia drum cooler according to claim 1, characterized in that, The height ratio of the fire bricks (5) with alternating high and low heights is 22:

18.

7. The light-burned magnesia drum cooler according to claim 1, characterized in that The material of the fire brick (5) is bauxite, and the grade is LZ-55.

8. The light-burned magnesia drum cooler according to claim 1, characterized in that, The heat-insulating layer (4) uses aluminum silicate heat-insulating material.

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