Installation conditions and precautions of refrigeration compressors

Installation conditions and precautions of refrigeration compressors

The selection of the installation site is most ignored by the staff. Often after the compressor is purchased, you can find a location and use it immediately after piping. There is no prior planning at all. Little did they know that such a sloppy result would cause future compressor failure and maintenance difficulties and poor compressed air quality. Therefore, choosing a good installation location is a prerequisite for the correct use of air compressor systems.

1. It must be wide and well-lit to facilitate operation and maintenance.

2. The relative humidity of the air should be low, less dust, clean and well ventilated.

　　3. The ambient temperature must be lower than 40℃, because the higher the ambient temperature, the smaller the output air volume of the compressor.

　　4. If the factory environment is poor and dusty, pre-filtering equipment must be installed.

　　 5. Passages are reserved, and those who meet the conditions can install cranes to facilitate maintenance.

　　 6. Reserve space for maintenance, and there must be at least 70 cm between the compressor and the wall.

　　7. The compressor should be at least one meter away from the headspace.

Precautions

　　Piping, foundation and cooling system, air pipe piping precautions:

1. When piping the main pipeline, the pipeline must have an inclination of 1°~2° to facilitate the drainage of condensate in the pipeline.

2. The pressure drop of the piping should not exceed 5% of the set pressure of the compressor, so it is better to choose a larger pipe diameter when piping.

　　3. The branch pipeline must be connected from the top of the main pipeline to prevent the condensed water in the pipeline from flowing into the air-consuming equipment. The compressor air outlet pipeline should preferably have a one-way valve.

　　4. If several compressors are installed in series, a ball valve or automatic drain valve must be installed at the end of the main line to facilitate the discharge of condensate.

　　 5. Do not shrink the main pipeline arbitrarily. If you must reduce or enlarge the pipeline, you must use a reducer, otherwise there will be mixed flow at the joint, resulting in a large pressure loss and also affecting the service life of the pipeline.

　　 6. If there are purification buffer facilities such as air storage tank and dryer after the compressor, the ideal piping should be compressor + air storage tank + front filter + dryer + rear filter + fine filter. In this way, the gas storage tank can filter out part of the condensed water, and the gas storage tank also has the function of reducing the gas exhaust temperature. The air with lower temperature and less water content enters the dryer again, which can reduce the load of the dryer or filter.

　　7. If the air consumption of the system is very large and the time is short, and the instantaneous air consumption changes greatly, an air storage tank should be installed as a buffer (its capacity should be greater than or equal to 20% of the maximum instantaneous air volume), which can reduce the compressor unit Frequent loading or unloading times can reduce the number of actions of control elements, which is of great benefit to maintaining the operating reliability of the compressor. Under normal circumstances, a gas storage tank with a capacity of 20% of the displacement can be selected.

8. For compressed air with system pressure below 1.5MPa, the flow velocity in the delivery pipe must be below 15m/sec to avoid excessive pressure drop.

9. Minimize the use of elbows and various valves in the pipeline to reduce pressure loss.

　　10. The ideal piping is that the main line surrounds the entire plant, so that compressed air in both directions can be obtained at any position. For example, when the gas consumption of a branch line suddenly increases, the pressure drop can be reduced. In addition, appropriate valves are arranged on the ring-shaped trunk line for maintenance and shut-off.

　　 Installation base

1. The foundation should be built on a hard floor, and the foundation plane must be leveled before installation to prevent the compressor from vibration and noise.

2. If the compressor is installed upstairs, anti-vibration treatment must be done to prevent vibration from being transmitted downstairs or resonance, which poses a safety hazard to the compressor and the building itself.

　　3. The vibration produced by the screw compressor is very small, so no fixed foundation is required. But the ground on which it is placed must be flat, and the underground cannot be soft soil. The bottom of the compressor should be covered with soft pads or shock-proof pads to prevent vibration and noise.

cooling system

1. When you choose an air-cooled compressor, consider its ventilation environment. Do not place the compressor near high-temperature equipment to prevent the compressor from inhaling high-temperature atmosphere and causing the exhaust temperature to become too high, which may affect the normal operation of the unit.

2. When the conditions of use restrict the compressor to be installed in a small confined space, extraction and exhaust equipment must be installed to facilitate air circulation, and the capacity of the extraction and exhaust equipment must be greater than the exhaust volume of the compressor cooling fan, and The suction inlet position should be suitable for the compressor hot exhaust outlet position.

　　 Strictly follow the installation regulations

　　The installation of the compressor should follow the relevant local laws and regulations, and strictly observe the following regulations:

1. The compressor should be hoisted with lifting equipment with a load-bearing capacity greater than the weight of the unit, and the hoisting speed and acceleration should be limited within the permitted range.

2. Try to install the compressor in a cool, clean and well-ventilated place to ensure that the air sucked by the compressor is clean and the moisture content is small.

　　3. The air sucked by the compressor is not allowed to contain flammable gas and corrosive gas, so as not to cause explosion or internal corrosion.

　　4. Air-cooled machines should preferably have exhaust fans or ducts to lead the hot air out of the room to avoid hot|examination|big|air circulation to the air inlet.

　　 5. The discharge of compressor sewage and waste oil shall comply with the regulations of the local environmental protection department.

　　 6. This machine uses a three-phase AC power supply of 380V, 50Hz. The power supply line to guide the compressor must match its power and install safety devices such as air switches and fuses. To ensure the reliability and safety of electrical equipment, it must be reliably grounded.

　　 Debugging operation principle

1. The commissioning of the new machine must be carried out by commissioning personnel designated or approved by the company;

2. Before starting up, confirm that there is no one in the unit, check whether there are any leftovers and tools, and close the door of the unit; when starting the unit, notify the people around the unit to pay attention to safety;

　　3. During trial operation, strictly check the operating direction of the compressor. When it is found to be reversed, stop immediately, cut off the power supply, reverse any two of the three-phase wires and restart the compressor, otherwise the compressor will be damaged (pay attention to every factory power supply inspection!)

　　4. The compressor cannot work at a discharge pressure higher than the discharge pressure specified on the nameplate, otherwise it will cause the motor to overload and burn out;

　　 5. When the compressor is under remote control, the machine may start at any time and should be listed as a reminder;

　　 6. When the compressor fails or there are unsafe factors, do not force it on. At this time, the power supply should be cut off and a prominent mark should be made.

　　Maintenance method

　　 The maintenance and repair of the compressor must be carried out under the guidance of qualified personnel.

1. Compressed air and electrical appliances are dangerous. During inspection or maintenance, make sure that the power supply has been cut off, and put up warning signs such as "Overhaul" or "No opening of the gate" at the power supply to prevent others from closing and sending power and causing injury;

2. When shutting down for maintenance, it is necessary to wait for the entire compressor to cool down and the compressed air of the system to be released safely, and the maintenance personnel should avoid any exhaust ports in the compressor system as much as possible and close the corresponding isolation valve;

　　3. When cleaning the parts of the unit, non-corrosive and safe solvents should be used, and the use of flammable, explosive and volatile cleaning agents is strictly prohibited;

　　4. After the compressor has been running for a period of time, the safety valve and other protection systems must be inspected regularly to ensure that it is sensitive and reliable, and is generally inspected once a year;

　　 5. The compressor spare parts must be provided by the original manufacturer, and the screw oil must be the company's designated screw compressor special oil, and the two brands of oil must not be mixed, otherwise it will cause the system to collect coke and cause a major accident.