Circulating cold air dust collecting device of cement grinding system

Abstract

The utility model discloses a cement grinding system circulating cold air dust collecting device which comprises a cement grinding mill powder selecting machine, the lower portion of the cement grinding mill powder selecting machine is connected with a V-shaped powder selecting machine, the lower portion of the V-shaped powder selecting machine is connected with a compression roller machine through a steady flow bin, a circulating air pipeline is arranged on the side wall of the V-shaped powder selecting machine, the circulating air pipeline is cut off and sealed through a louver valve, and the V-shaped powder selecting machine is connected with the compression roller machine. The utility model relates to the technical field of cement grinding, the circulating air pipeline is cut off and is provided with a louver valve to play a sealing role, and the three dust collecting pipelines are respectively led to main dust raising points such as a roller press, a material mixing belt and a material returning belt, so that the dust raising points of the roller press, the material mixing belt, the material returning belt and the like can be closed, and the dust raising points of the roller press, the material mixing belt, the material returning belt and the like can be closed. And branch dust collecting pipes are arranged to be connected with the material cake elevator, the tail of the out-of-mill elevator, the out-of-mill chute and other positions, the dust collecting function of all dust raising points is achieved, in addition, a cold air supplementing point is installed in the space of the mill room, and the running temperature of the mill system is reduced through cold air.

Description

Technical Field

[0001] The utility model relates to the technical field of cement grinding, in particular to a circulating cold air dust collection device for a cement grinding system. Background Art

[0002] Environmental protection is one of the most important requirements in the cement production process in recent years. At the same time, the entire production system needs to control the material flow rate by air, and cooperate with equipment such as ball mills, roller presses, and separators for production. In recent years, the temperature of the material entering the mill has continued to rise. Excessive temperature will cause the mill production capacity to decline, affecting the efficiency of cement grinding operations. Moreover, the dust in the operation area is relatively serious. Dust is easy to enter the lungs through the nasal cavity and throat, causing changes in lung function, nervous system diseases, lung cancer, etc., posing a serious threat to the health of operators. In view of this, in-depth research on the above problems has led to the generation of this case. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a circulating cold air dust collection device for a cement grinding system, which solves the problems raised in the background art.

[0004] To achieve the above objectives, the utility model is realized through the following technical solutions: A circulating cold air dust collection device for a cement grinding system includes a cement mill separator. A V-shaped separator is connected to the lower part of the cement mill separator. The lower part of the V-shaped separator is connected to a roller press through a steady flow bin. A circulating air duct is arranged on the side wall of the V-shaped separator. The circulating air duct is cut off and closed by a louver valve. The circulating air duct is successively connected with a first dust collection duct, a second dust collection duct, and a third dust collection duct. The open end of the first dust collection duct is located at the position of the mixing belt. The open end of the second dust collection duct is located at the position of the return belt. The third dust collection duct is communicated with the roller press housing. A plurality of branch dust collection pipes are arranged on the third dust collection duct. The open ends of the branch dust collection pipes are located in the grinding room, and a cold air supplement point is arranged in the grinding room.

[0005] The open positions of the above-mentioned branch dust collection pipes are respectively connected to a cake elevator, the tail of the out-of-mill elevator, and the out-of-mill chute.

[0006] Air valves and actuators are installed at the open positions of the first dust collection duct, the second dust collection duct, the third dust collection duct, and the branch dust collection pipes.

[0007] The first dust collection duct, the second dust collection duct, and the third dust collection duct are all pipes with a diameter of Φ1000mm.

[0008] The branch dust collection pipes are Φ300mm pipes.

[0009] The utility model provides a circulating cold air dust collection device for a cement grinding system, which has the following beneficial effects: the circulating cold air dust collection device for the cement grinding system truncates the circulating air pipeline and installs a louver valve to achieve a sealing effect. Three dust collection pipelines are installed, leading to the main dust generating points such as a roll press, a mixing belt, and a return belt respectively. Branch dust collection pipes are set to connect positions such as a cake elevator, the tail of an out-of-mill elevator, and an out-of-mill chute to realize the function of collecting dust at each dust generating point. In addition, a cold air supplement point is installed in the grinding mill room space. The cold air is used to reduce the operating temperature of the mill system. Taking air at the dust generating point not only has a dust collection effect and improves the air environmental quality of the operation area, but also directly supplements cold air. At the same time, due to the increase in air volume, the selection efficiency is improved, the circulating load of the roll press system is reduced, and the working efficiency of the roll press is improved. Brief Description of the Drawings

[0010] Figure 1 It is a front view structural schematic diagram of the circulating cold air dust collection device for the cement grinding system described in the utility model.

[0011] In the figure: 1. Cement mill classifier; 2. V-type classifier; 3. Constant flow bin; 4. Circulating air pipeline; 5. Louver valve; 6. First dust collection pipeline; 7. Second dust collection pipeline; 8. Third dust collection pipeline; 9. Branch dust collection pipe; 10. Air valve. Detailed Embodiments

[0012] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0013] Embodiment: In combination with the attached drawings of the specification Figure 1It can be seen that the present application specifically designs a circulating cold air dust collection device for a cement grinding system, which includes a cement mill classifier 1. A V-type classifier 2 is connected to the lower part of the cement mill classifier 1. The lower part of the V-type classifier 2 is connected to a roll press through a steady flow bin 3. A circulating air duct 4 is arranged on the side wall of the V-type classifier 2. The circulating air duct 4 is cut off and closed by a louver valve 5. A first dust collection duct 6, a second dust collection duct 7 and a third dust collection duct 8 are sequentially connected at the position of the circulating air duct 4. The first dust collection duct 6, the second dust collection duct 7 and the third dust collection duct 8 are all ducts with a pore diameter of Φ1000mm. The open end of the first dust collection duct 6 is located at the position of the mixing belt. The open end of the second dust collection duct 7 is located at the position of the return belt. The third dust collection duct 8 is communicated with the roll press housing. A plurality of branch dust collection pipes 9 are arranged on the third dust collection duct 8. The branch dust collection pipes 9 are Φ300mm ducts. The open ends of the branch dust collection pipes 9 are located inside the grinding room. A cold air supplement point is arranged inside the grinding room. Among them, the open positions of the branch dust collection pipes 9 are respectively connected to the cake elevator, the tail of the out-of-mill elevator and the out-of-mill chute. During use, by controlling the main exhaust draft, the wind speed at the lower part of the V-type classifier 2 is increased, the material lifting effect is enhanced, and the fine powder particles are brought into the cement mill classifier 1 to increase the classification effect. The amount of coarse particle size ash powder after screening by the classifier increases, which can effectively reduce the particle size of the material entering the mill, increase the amount of material entering the mill, reduce the operating current of the mill, improve the grinding work efficiency, promote the separate grinding efficiency. The large particle materials after classification are sent through the steady flow bin 3 and the roll press feeding chute into the roll press. The particle size of the materials entering the roll press increases, reducing the circulating load of the roll press system and improving the working efficiency of the roll press. In addition, when the outdoor temperature is too high, this device can reduce the system temperature and reduce the influence of high temperature on the working conditions of the mill. The original designed circulating air duct 4 is closed, and the first dust collection duct 6, the second dust collection duct 7 and the third dust collection duct 8 are installed at the position of the circulating air duct 4 and are respectively connected to the main dust generating positions such as the mixing belt, the return belt and the roll press housing, and the branch dust collection pipes 9 are respectively connected to other dust generating points such as the cake elevator, the tail of the out-of-mill elevator and the out-of-mill chute, which can effectively reduce the dust inside the grinding room and improve the environmental quality of the operation area. At the same time, a cold air supplement point is arranged inside the grinding room, which can effectively increase the cold air supplement air volume.

[0014] In the specific implementation process, as a preferred setting, air valves 10 and actuators are installed at the opening positions of the above-mentioned first dust collection pipeline 6, second dust collection pipeline 7, third dust collection pipeline 8 and branch dust collection pipe 9. When changing the production variety, according to the working conditions of the mill, the air valve 10 is adjusted to control the cold air make-up amount, mainly controlling the air volume entering the lower part of the V-type classifier 2, controlling the material screening process, cooperating with the operation of the mill, reasonably adjusting the opening degree of the air valve 10 to meet the dispersing effect of the V-type classifier 2, reducing the load, increasing the hourly output of the cement mill, reducing the power consumption, installing air valves 10 at the pipeline inlets respectively to control the air volume. Especially in summer when the ambient temperature is high, a large amount of cold air is supplemented to prevent external hot air from entering the cement mill system, and at the same time, the hot air generated by the equipment in the mill room is taken away.

[0015] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circulating cold air dust collecting device for a cement grinding system, comprising a cement grinding powder classifier, wherein the lower part of the cement grinding powder classifier is connected to a V-type powder classifier, the lower part of the V-type powder classifier is connected to a roller press through a stabilizing bin, and the side wall of the V-type powder classifier is provided with a circulating air duct, characterized in that: The circulating air duct is cut off and closed by a shutter valve, and the circulating air duct is sequentially connected to the first dust collecting duct, the second dust collecting duct and the third dust collecting duct, the opening end of the first dust collecting duct is located at the mixing belt position, the opening end of the second dust collecting duct is located at the return belt position, the third dust collecting duct is connected to the roller press guard, and the third dust collecting duct is provided with a plurality of branch dust collecting pipes, and the opening ends of the branch dust collecting pipes are located in the mill room, and a cold air supply point is provided in the mill room.

2. The circulating cold air dust collecting device for cement grinding system according to claim 1 is characterized in that: The opening positions of the branch dust collecting pipes are respectively connected to the material cake elevator, the tail of the mill elevator and the mill chute.

3. The circulating cold air dust collecting device for cement grinding system according to claim 1 is characterized in that: Air valves and actuators are installed at the opening positions of the first dust collecting duct, the second dust collecting duct, the third dust collecting duct and the branch dust collecting duct.

4. The circulating cold air dust collecting device for cement grinding system according to claim 1, characterized in that: The first dust collecting duct, the second dust collecting duct and the third dust collecting duct are all ducts with an aperture of Φ1000mm.

5. The circulating cold air dust collecting device for cement grinding system according to claim 1 is characterized in that: The branch dust collecting pipe is a Φ300mm pipe.

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