CN203750656U - Mechanical superfine grinding system - Google Patents

Abstract

The utility model discloses a mechanical ultrafine pulverization system, which comprises an air source, an electric control cabinet, a feeding mechanism, a crushing host, a cyclone separator, a bag-type dust collector, an induced draft fan, a feeding mechanism, a crushing host, and a cyclone separator , bag filter, and induced draft fan are sealed and connected sequentially through pipelines, and the air source is composed of air compressor, T-level filter, air storage tank, cold dryer, A-level filter, and H-level filter through the pipeline in sequence Sealed connection, the high-cleanness compressed air generated by the air source provides bearing protection gas and large particle sealing air for the crushing main machine; the electric control cabinet controls the operation of the entire system; The machine body is a grading chamber, and the lower body is a crushing chamber. The grading wheel motor and the grading wheel are directly connected in the grading chamber. The grading wheel motor is a frequency conversion speed regulating motor. : 500-8000r/min; a crushing disc is set in the crushing chamber, and a hammer head is installed on the crushing disc.

Description

Mechanical Superfine Pulverization System

technical field

The utility model relates to a mechanical ultrafine pulverization system.

Background technique

Due to the miniaturization of particle size, many physical and chemical properties of ultrafine powder materials have undergone special changes. People use these properties in chemical industry, light industry, metallurgy, electronics, high-tech ceramics, composite materials, nuclear technology, The fields of biomedicine and national defense cutting-edge technology have greatly promoted the development of these fields. It can be said that ultrafine powder materials are penetrating into the entire industrial sector and high-tech fields. At present, the ultrafine powder materials on the market are mainly prepared by jet mills, but jet mills have problems such as uneven particle size distribution, high energy consumption, and high prices.

Chinese patent application CN102613325 discloses a processing device for ultrafine tea powder, which includes sequentially connected compressed air power sources, oil-water separators, gas storage tanks, primary filters, gas dryers, precision filters, and sterilizing filters. device, material bin, fluidized bed jet mill, cyclone collector, bag collector and high-pressure induced draft fan. This patent adopts a fluidized bed jet mill, which has low crushing efficiency and high energy consumption.

Contents of the invention

The purpose of this utility model is to overcome the shortcomings of the above-mentioned prior art and provide a mechanical ultrafine pulverization system. This system integrates mechanical pulverization and airflow classification, has compact structure, high pulverization efficiency, energy saving and environmental protection, and uniform particle size distribution of finished products. ,high degree of automation.

In order to achieve the above object, the utility model adopts the following technical solutions:

A mechanical ultrafine pulverization system, including an air source, an electric control cabinet, a feeding mechanism, a crushing host, a cyclone separator, a bag-type dust collector, and an induced draft fan, wherein the feeding mechanism, the crushing host, the cyclone separator, and the bag-type dust collector The air compressor and the induced draft fan are sealed and connected sequentially through pipelines. The air source is sealed and connected by the air compressor, T-level filter, air storage tank, cold dryer, A-level filter, and H-level filter through pipelines. The high cleanliness compressed air generated by the source provides bearing protection gas and large particle sealing air for the crushing host; the electric control cabinet controls the operation of the entire system; the feeding mechanism is a twin-screw feeder; the crushing host is divided into upper and lower arrangements The upper body and the lower body are interlinked. The upper body is a grading chamber, and the lower body is a crushing chamber. The grading wheel motor and the grading wheel are directly connected in the grading chamber. The machine realizes stepless speed regulation, and the speed regulation range is 500-8000r/min; a crushing disc is installed in the crushing chamber, and a hammer is installed on the crushing disc; the electric control cabinet adopts a PLC control system.

In the utility model, the twin-screw feeder: frequency conversion feeding, forced feeding, the feeding speed is controlled by the amount of material in the machine and the current of the crushing disc motor.

Cyclone separator: The device can better make the dusty gas rotate, and separate it from the gas by means of the centrifugal force of the particles. The cyclone separator is equipped with a pneumatic vibrator to prevent material clogging. The lower part of the cyclone separator is equipped with an electro-pneumatic butterfly valve, which is automatically controlled by the system.

Bag-type dust collector: This equipment uses a pulse meter to realize automatic blowing and dust removal in turns, with high collection efficiency and dust emission in line with national environmental protection emission standards. The efficiency of the dust collector is greater than 99%, and the dust concentration is less than 30mg/m3.

High-pressure induced draft fan: This device is used to induce air for the system, overcome the resistance of pipelines and high-efficiency dust collectors, reduce the pressure in the host cavity, improve the crushing effect, and form negative pressure in the dust collector. In order to reduce the starting load of the fan, please close the air volume regulating valve before starting the induced draft fan.

Control cabinet: The electrical control cabinet is the main component of the system. The electric control cabinet adopts PLC control system, which works stably and reliably. It can control and monitor the operating status of the corresponding components and realize automatic control. The functions of the control cabinet include: sound and light alarm, overload protection, thermal protection, short circuit protection, phase loss protection, program start and stop, etc.

Air source system: This equipment can realize the control of compressed air through various valves. The system is used for:

(1) Provide a large particle sealing air source for the gap between the classifying wheel and the discharge cylinder.

(2) Provide a protective air source for the classifying wheel motor bearings.

(3) Provide the air source for the filter bag of the pulse bag filter.

The utility model operation method:

Start-up sequence: start the classification wheel motor first, and then turn on the high-voltage induced draft fan and the crushing disc motor. When the current expression of the crushing disc motor is stable, the feeding system can be started.

The feeding amount can be controlled according to the amount of material in the machine and the current of the crushing disc motor.

The control of the particle size is mainly the speed of the classifying wheel, the air volume and the feeding amount. When the induced air volume and the feeding amount are stable, the particle size can be controlled by adjusting the speed of the classifying wheel: the higher the speed, the finer the particle size of the product, and vice versa. The smaller the air volume, the finer the particle size, but the output also decreases. The best debugging method is when the air volume and feeding volume are constant. The current of the crushing disc motor is within the rated range, and the grading wheel motor can be adjusted to achieve the best state according to the actual situation during the reproduction process.

The shutdown sequence is to turn off the feeding system first. When the current of the crushing disc motor reaches the minimum, the main engine can be turned off, and then the induced draft fan and the classifying wheel motor can be turned off.

The beneficial effect of the utility model is that the equipment is compact in design, reasonable in structure, has a winnowing type, no screen and no net, and a grading structure inside the machine, which can complete the crushing and grading at one time. All the heat is sent out, and high temperature will not be generated to damage the material performance. The crushing part is made of cemented carbide, which has a longer service life and is an ideal crushing equipment.

Description of drawings

Figure 1 is a schematic diagram of each component of the system;

Fig. 2 is a schematic diagram of an air source;

Fig. 3 is a schematic diagram of crushing the host;

In the figure 1. Air source, 2. Electric control cabinet, 3. Feeding mechanism, 4. Crushing host, 5. Cyclone separator, 6. Bag filter, 7 induced draft fan, 8. Air compressor, 9.T Class filter, 10. Air storage tank, 11. Cold dryer, 12. Class A filter, 13. Class H filter, 14. Large particle sealing gas, 15. Bearing protection gas, 16. Crushing chamber, 17. Grading chamber, 18. Hammer head, 19. Ring gear.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

In Fig. 1, the feeding mechanism 3, the crushing host 4, the cyclone separator 5, the bag filter 6, and the induced draft fan 7 are sequentially sealed and connected through pipelines, and the materials are sent into the crushing host 4 through the feeding mechanism 3, and after crushing The qualified powder particles are collected by the cyclone separator 5 and the bag filter 6, the clean air is discharged by the induced draft fan 7, and the electric control cabinet 2 controls the operation of the whole system. Feeding mechanism 3 is a twin-screw feeder. Electric control cabinet 2 adopts PLC control system.

In Fig. 2, the air source 1 is sealed and connected sequentially by the air compressor 8, the T-level filter 9, the air storage tank 10, the cold dryer 11, the A-level filter 12, and the H-level filter 13 through pipelines, which produces The high cleanliness compressed air provides large particle sealing air 14 and bearing protection air 15 for the crushing host, which can reduce the pollution of the finished product and improve the particle size distribution.

In Fig. 3, the crushing host is a high-speed impact crusher with large crushing capacity per unit power and low operating cost. The crushing host is divided into an upper body and a lower body that are arranged up and down and connected. The upper body is the classification chamber 17, and the lower body is the crushing The classifying wheel motor and the classifying wheel are directly connected in the classifying room 16 and the crushing host classifying room 17. The classifying wheel motor is a variable frequency speed regulating motor, and the classifying wheel motor realizes stepless speed regulation through a frequency converter. min; a crushing disc is set in the crushing chamber 16, and a hammer is installed on the crushing disc; the material is crushed in the crushing chamber 16 by the high-speed impact of the hammer 18 and the ring gear 19, and the qualified powder is separated through the classifying wheel in the classifying chamber 17 , collected by the cyclone separator 5 and the bag filter, the clean air is discharged by the induced draft fan 7, and the unqualified powder returns to the crushing chamber 16 to continue crushing until it meets the requirements.

Although the specific implementation of the utility model has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the utility model. Those skilled in the art should understand that on the basis of the technical solution of the utility model, those skilled in the art do not need to Various modifications or deformations that can be made with creative efforts are still within the protection scope of the present utility model.

Claims (1)

1. a mechanical superfine comminution system, it is characterized in that, comprise source of the gas, electrical control cubicles, feeding mechanism, pulverizing main frame, cyclone separator, fiber bag precipitator and air-introduced machine, wherein between feeding mechanism, pulverizing main frame, cyclone separator, fiber bag precipitator, air-introduced machine, be tightly connected successively by pipeline, source of the gas is tightly connected by pipeline successively by air compressor machine, T level filter, air accumulator, cooling driers, A level filter, H level filter, and the high cleanliness compressed air that source of the gas produces provides bearing protection gas and bulky grain blanket gas for pulverizing main frame; The operation of described electrical control cubicles control whole system; Described feeding mechanism is double-screw feeder; Pulverize main frame and be divided into upper machine body and the lower body arranged up and down and communicate, upper machine body is grading room, lower body is pulverizing chamber, in grading room, be provided with grading wheel motor and the grading wheel of direct connection, grading wheel motor is frequency control motor, grading wheel motor is realized stepless speed regulation by frequency converter, speed adjustable range: 500-8000r/min; Grating disk is set in pulverizing chamber, tup is installed on grating disk; Electrical control cubicles adopts PLC control system.