气力输送设备的原理（The principle of pneumatic conveying equipment）

气力输送设备的原理（The principle of pneumatic conveying equipment） 气力输送设备的原理(The principle of pneumatic conveying equipment) The principle of pneumatic conveying equipment: this device is a complete system equipment which uses compressed air as power to carry solid dry particles through dry sealing pipeline. The system consists of five parts: gas source, transmitter, pipe, control and silo. It has the advantages of high conveying capacity, small pipe wear, long conveying distance, low energy consumption, no pollution and high automation. At present, the world is the most advanced dry conveying equipment of solid particles. Uses: widely used in coal, chemical, foundry, coal-fired power plants, pharmaceuticals, building materials, food, ports and other industries. Production characteristics: according to the nature of conveying material provided by the user (size and density), transportation distance, climbing height field, productivity, delivery mode (continuous or intermittent) of the design, select the appropriate equipment, non-standard products, tailored a single design, small volume, multi species. According to the equipment combination, pneumatic conveying device can be divided into three basic forms: suction, compression and mixing. Air suction type pneumatic conveying device: the conveying mode is characterized by,; 1. can suck material from several places and deliver it to one concentration. 2. suitable for the accumulation of wide surface, or installed in the lower depths of the transport of materials. 3. as long as there is air intake, you can easily extend the pipe into some narrow places (such as the lower part of the hopper), and absorb the material for transportation. 4. in the process of conveying, no dust flying, the feed port can be opened, feeding and conveying can be carried out continuously. 5. because the pressure of the conveying air is lower than the atmospheric pressure, the water is easy to evaporate, so the material with more water is easy to transport than the compressed air. Two, pneumatic pneumatic conveying device: this way of transportation is characterized by: 1. fork the discharge pipe and install the switching valve, you can change the delivery route or transport to several places at the same time. 2. because the pressure of the air supply can be increased to the maximum exhaust pressure rated by the fan, even if the transportation conditions change, it can also maintain a certain degree of adaptability, suitable for high concentration and long distance transportation. 3. the whole device is in a state of positive pressure, the material is easy to discharge from the discharge port. The structure of the unloader and dust collector is simple, but the feeder structure is complex. In the process of transportation, dust flies easily. Main equipment of pneumatic conveying device (1) feeder and feeder; The feeder and feeder are a kind of equipment that mixes material with air and is fed into the feed pipe. It is the throat of the wind gear. The structure of the feeder is reasonable, which directly affects the conveying capacity, stability and power consumption of the whole wind conveyer. Therefore, how to design and select the reasonable feeder according to the different working conditions of the device is an important link to improve the work efficiency of wind transportation. The requirements of the butt feeder structure are: First, the material and the air can be fully mixed in the receiver, which will make the air introduced from the material below, the chain increased, and evenly scattered in the air, so, in order to effectively play the role of air suspension and prevent fall. Second, the structure of the feeder will allow air to enter smoothly without causing excessive disturbance and eddy currents to reduce the energy loss of air flow. Third, it is necessary to make the material entering the airflow consistent with the direction of the flow of air, avoiding reverse feeding. In some cases, the material slows down or uses its momentum to turn it, thus reducing the energy consumption of the airflow to drive the material. The receiver has a negative pressure feeder and a positive pressure feeder (feeder). The former is used for suction air handling units, and the latter is used in compressed air units. Device for conveying granular material by air flow along pipeline. There are three kinds of suction, pressing and mixing. Its working principle is to utilize the kinetic energy of the airflow to make the particulate material suspended and flow along the airflow along the pipeline. Suction type. When the exhauster starts, the whole system is in a certain degree of vacuum. Under the action of differential pressure, the air flow makes the material enter the suction nozzle, The material is separated from the air stream and discharged from the bottom of the separator. The air flow is purified by the dust collector and then discharged into the atmosphere through a silencer. The utility model has the advantages that the materials are simple and can absorb materials from several places simultaneously. But the conveying distance is short and the productivity is low. High sealing requirements. Pressing type. The blower presses air into the pipe, and the material is supplied from the feeder. The mixture of air and material is pressed along the feed pipe to the discharge area. The material is discharged after the separator and the air is discharged into the atmosphere after being purified by the dust collector. The characteristics of the utility model are opposite to the suction and delivery type, and the materials can be transported to several places at the same time, and the conveying distance is long, and the productivity is higher, but the structure is complicated. Mixed type. A combination of the above two forms. Compared with the mechanical type continuous conveying device, which is characterized in that the material in the conveying process is completely closed and is affected by climate and environment, working conditions, material caused by damp, defaced or mixed with impurities, simple equipment, compact structure, flexible layout, small area, low cost of equipment, at the same time some process (such as drying, crushing, grading) operation, easy centralized control, can realize automation, improve transport capacity. In addition to brittle, adhesion, grinding, corrosion and chemical changes of the material to be treated, the general loose materials can be transported. The disadvantage is that the energy consumption is large, the material has a certain degree of block, viscosity and humidity, and the noise of the fan is large. When grinding the material, the pipe is easy to wear. In order to overcome these shortcomings, a kind of hydrostatic conveying device is being developed. The basic principle is that a plurality of material bolts and air plugs are formed in the conveying pipe, and the material is pushed forward by air pressure to achieve the purpose of conveying. In addition, there is an air conveying chute for filling air into the powdery material so as to make the material flow well and easy to transport. Pneumatic conveying device is a device that uses pneumatic conveying granular material along pipeline. There are three kinds of suction, pressing and mixing. Its working principle is to utilize the kinetic energy of the airflow to make the particulate material suspended and flow along the airflow along the pipeline. In addition to brittle, adhesion, grinding, corrosion and chemical changes of the material to be treated, the general loose materials can be transported. System overview Dilute phase pneumatic conveying is mainly divided into negative pressure suction system and positive pressure blowing system Dilute phase conveying is the air flow generated by the blower or vacuum pump in the pipeline. The positive pressure or negative pressure is adopted to drive or pull the material in the pipeline at higher speed so as to transport the material to the corresponding equipment. Therefore, the transportation is also known as low - speed system, it has the material gas lower than m (usually the feed gas ratio is m=0.1~20, pressure p=0.01 ~ 0.1MPa or pv= - 0.01~ - 0.06MPa vacuum, v=5~30m/s belongs to the low - speed high speed system). The initial speed of the system is about 10m/s, and the tail reaches about 22m/s high speed, so the airflow speed is higher. The initial end pressure of the pipeline is usually less than 0.1MPa, while the tail end is close to the atmospheric pressure. Dilute phase conveying media generally use air or nitrogen, power by blower or vacuum pump. Roots blower and vacuum pump of dilute phase conveying, material in the pipeline in a suspended state, Baidu promotion, transfer the equivalent distance of up to one hundred meters. The main components for the mixing chamber, nozzle, star feeding valve, cyclone separator, dust remover, roots blower, electric control cabinet etc.. The negative pressure system is mainly the use of vacuum blower (or vacuum pump) in vacuum sealing pipe, below the outside atmospheric pressure air flow through the nozzle (or star feed valve and hybrid accelerating chamber unit) feed, and then mixed with air, along the suction to the cyclone separator for conveying pipeline (commonly known as Sha Kelong) for gas-solid separation, from low or multiple bulk material conveying to the height of one or more points of. The utility model is characterized in that the material is not leaked, the environmental problem is not caused, and the feeding device is relatively simple. The positive pressure blow system is that the compressed air (or nitrogen) is blown into the pipe at higher than the outside atmospheric pressure, and a mixture of gas and air is formed at the mixing acceleration chamber, The material is sent to the corresponding equipment through the pipeline to complete the whole conveying process. The utility model is characterized in that the conveying capacity is large, the distance is long, the flow rate is low, and the stability is stable. Less material impact. Moreover, the separated gas is discharged directly into the atmosphere and prolongs the service life of roots blower. Negative pressure suction and positive pressure blowing can also be properly combined to form an integrated system, because it has the advantages of negative pressure transmission and positive pressure transmission, and can meet some complex production process requirements. Company website Www.gytdzk.com pad machine Www.qlxsxt.com perlite exterior insulation board equipment Www.ftssxt.com pneumatic conveying equipment Www.gytd.com pulse bag filter Www.chengquanji.com dust humidifying mixer