How to choose air compressor for wall putty production plant
Author：ANT CONSTRUCTIONS Comefrom： Createdate：2020/10/7 16:57:42 Hits：26
How to choose air compressor for wall putty production plant
Among the putty powder complete sets of dry mortar production line produced by Ant Constructions, an indispensable equipment is air compressor (also known as air pump). In the putty powder complete automatic production line, dual-axis non-gravity mixer is the main type mixer machine for producing wall putty in an automatic production plant, it adopts pneumatic discharging of materials. In addition, the putty powder automatic metering and packaging machine , pneumatic butterfly valves, pulse dust collectors and other devices are also need air power source. All in all, air compressor place a very important role in the whole production process line of wall putty powder, and the choice of air compressors is also very important.
In the current market, there are many types and models air compressors, ranging from automobiles and tractors to mountain excavation and mining. The price ranges from hundreds of USD to thousands of USD. How a customer select and purchase a suitable air compressor?
What is air compressor
Air compressor refers to a compressor which compressing air. It is widely used in machinery of mining, chemical industry, petroleum, transportation, construction, navigation and other industries.
Normally standard air compressors capacity is 0.7Mpa defined by national standards, it's exhaust pressure is 0.7MPa, which is commonly referred to as 7 atmospheres or 7 kg (the old national standard was 0.8MPa in the past). The air compressor exhaust is usually mentioned pressure is 0.7MPa or 0.8MPa. If it is higher or lower than this, it is a non-standard special air compressor.
Classification of air compressor for wall putty production plant
1. According to the amount of air volume
according to the amount of air volume, The air discharged volume converted into volume in suction state when the air compressor working, can be classified to small air compressor (displacement below 10 m3/min), medium air compressor machines (displacement between 10-100 m3/min), and large air compressor machines (displacement above 100 m3/min). Domestic models have exhaust volume per minute 0.3, 0.6, 0.9, 1.6, 3, 6, 9, 10, 12, 20, 40, 60, 100 , mini air compressor and micro air compressor are comman in application, The super large size over 100 is rare, and is limited in size and weight, piston air compressors with a displacement of more than 100 are unreasonable.
2. According to the structure, there are rotary type, piston type and membrane type
Among them, screw type and sliding vane type in piston type and rotary type are more common. Each of these three types of air compressors has its own advantages and disadvantages. Screw compressor have high manufacturing costs due to it's complex rotor profile, but it's advantages are small size, light , and small parts. With the same displacement, screw compressor is much more expensive than piston compressor, maintenance requires specialized knowledge and experience.
3. According to the cylinder centerline and relative position,
It can be classified the vertical, horizontal and angle types. The angle types are also divided into V type, W type, L type, etc.
Generally speaking, because the piston compressor is a reciprocating machine, there is a certain vibration, and the angle type with better balance its inertial force. Therefore, most of the small and medium piston compressors are made into the angle type, only the compressors for vehicles and ships due to the limitation of floor space, it is built-up in horizontal type air box compressor. It is the initial product of the initial industrial generation and has no superiority. Now it is almost no longer produced.
4. According to the cooling method:
Compressors make the temperature rise in compressing chamber during air compression and must be cooled. Generally, each stage of compression must have an intercooler, so according to the cooler method, it is divided into water-cooled and air-cooled. The water-cooled type uses water for circulating cooling; the air-cooled type uses fan cooling.
5. According to the difference of the prime mover:
There are electric motor drive mode and diesel engine drive mode. The large electric type is equipped with a power distribution cabinet, and the diesel-driven type is started by a battery. Both compressors have direct connection and side connection (that is, belt drive).
6 According to the lubrication method:
7. According to the basic configuration:
2. The basic criteria to choose air compressor-Economy, reliability and safety.
2.1. Consider the exhaust pressure and the air volume of exhaust.
According to the national standard, the discharge pressure of the general-purpose aerodynamic compressor is 0.7MPa (7 atmospheres), and the old standard is 0.8MPa (that is 8 atmospheres). Because the working pressure of wind power tools and wind machinery is 0.4Mpa, the working pressure of air compressor can fully meet the requirements. If the compressor used by the user is larger than 0.8MPa, it should be specially made, and the method of forced pressurization cannot be adopted to avoid accidents.
The exhaust air volume is also one of the main parameters of the air compressor. Choose the air volume of the air compressor to match the exhaust volume you need, and leave a 10% margin. If the air consumption is large and the air compressor has a small exhaust volume, the air-driven tool will greatly reduce the exhaust pressure of the air compressor when the air-driven tool is activated, and the air-driven tool cannot be driven at low pressure. Of course, blindly pursuing a large air displacement is also wrong, because the larger the displacement, the larger the motor equipped with the compressor, not only the price is high, but also a waste of funds, as well as a waste of electricity when used.
In addition, when selecting the exhaust gas volume, the peak volume, the usual volume and the low volume in different stage should also be considered. The usual method is to connect air compressors with smaller displacement in parallel to obtain a larger displacement. As the gas consumption increases, start them one by one. This is not only good for the electric grid, but also energy saving (using the air compressors qty as actual demand), and there are standby machines, and the whole line will not stop production due to the failure of one machine.
2.2 Consider the occasions and conditions of air demand
The place and environment where the air compressor to be used are also important factors in choosing the compressor type. If the place is narrow, the vertical type should be selected, such as ship or vehicle; if the occasion requires long-distance changes (more than 500 meters), the mobile type should be considered; if the occasion cannot be used for power supply, the diesel-driven type should be selected; if the occasion does not have tap water, it must be Choose air-cooled. In the air-cooled and water-cooled cooling methods, users often have the illusion that the water cooling is better and the cooling effect is better, actually it doen't the case. Air-cooled compressors account for more than 90% of small compressors in China and abroad. In terms of design, air cooling is simple and no water source is required for use. The water-cooled type has its fatal shortcomings. First, it must have a complete water supply system and large investment; second, the water-cooled cooler has a short life; third, it is easy to freeze the cylinder in the winter; fourth, a lot of water will be wasted in dtaily operation
Considering the quality of compressed air, Generally, the compressed air produced by air compressors contains a certain amount of lubricating oil and a certain amount of water. In some area, oil and water are forbidden. In this kind occassion, not only consider the air compressor type and models, the auxiliary devices should be added when necessary. There are two solutions as follows: (1) Use a non-lubricated compressor. This kind of compressor cylinder basically does not contain oil, and its piston ring and packing are generally polytetrafluoroethylene. This kind of machine also has its shortcomings, one is poor lubrication and high failure rate, the other one is PTFE also a harmful substance, which cannot be used in the food and pharmaceutical industries, and the non-lubricated compressor can only deliver air without oil, but can't delivery air without water. (2) Therefore, the usual approach is to add a primary or secondary purification device or dryer to the air compressor (no matter which type). This device can make the compressor air contain neither oil nor water, so that the oil-water in the compressed air is below 5ppm to meet the process requirements.
3. Operational safety-How to choose air compressor for wall putty production plant
Air compressor is a kind of machine that works under pressure. It is accompanied by temperature rise and pressure during work. The safety of its operation must be put in first. In addition to the safety valve, the air compressor is also equipped with a pressure regulator to implement double insurance for overpressure unloading. It is unreasonable to have only a safety valve without a pressure regulator, which will not only affect the safety factor of the machine, but also The economy of operation is reduced (the general function of the pressure regulator is to close the suction valve and make the machine run dry).
Furthermore, China has implemented a standardized two-license system for compressor production, namely, compressor production license and pressure vessel production license (air storage tank). Therefore, when purchasing compressor products, the two certificates must be strictly reviewed. Generally, regular manufacturers have clear indications on the factory nameplate. Unlicensed products are not allowed to be used in principle.
Generally speaking, the government has conducted standardized inspections on the manufacturers of certified products. The quality assurance system of these manufacturers is complete, and there will be no major quality problems. Even if there are some problems, there is traceability and the manufacturer is responsible.
In short, the choice of air compressor is very important. Henan Ant Constructions Machinery Co, Ltd as one professional manufacturer of putty powder mixer machine production line, recommends that you choose air compressors with high reputation and good quality. Do not choose poor quality air compressors for temporary cheapness. The air compressor will not only affect the performance of the putty powder equipment, but also affect the production, and seriously threaten people's lives.
For more details, please contact our Ant Constructions engineers.
