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Selection of traps
Release time：2014-4-15
2, long life, reliable performance 3, can emit air 4, can discharge carbon dioxide gas 5, corrosion-resistant 6, can be in the back pressure under the pressure, the steam pressure can be the same, Work 7, can prevent dirt clogging steam traps
In the selection of the trap must follow the following conditions, because the equipment in the car and the normal operation of the amount of condensate generated a relatively large difference, so the choice of traps, the equipment must be consumed by the hourly consumption of the machine multiplier 2-3 times the maximum condensate water, to select the trap displacement. In order to ensure that the trap can be discharged as soon as possible when the condensate, quickly increase the temperature of heating equipment. Trap exhaust energy is not enough, will cause condensate can not be discharged in a timely manner, reducing the thermal efficiency of heating equipment.
1. The amount of hydrophobic trap:
When selecting a trap, the displacement of the trap must be selected by multiplying the steam consumption of the equipment by the frequency of 2-3 times the maximum condensing water. In order to ensure that the trap can be discharged as soon as possible when the condensate, quickly increase the temperature of heating equipment. Trap exhaust energy is not enough, will cause condensate can not be discharged in a timely manner, reducing the thermal efficiency of heating equipment. (When the steam heating device just started feeding, the equipment is cold, the interior is full of air, need to trap the air quickly discharged, and then row a large number of low-temperature condensate, the equipment gradually heat up, and then enter the normal working conditions. , A large amount of air and low temperature condensate, the lower inlet pressure, so that the trap overload operation, this time the trap requirements than normal work when the displacement is large, so press the magnification 2-3 times to select the trap.
2. The working pressure of the trap:
When selecting a trap, the trap can not be selected at nominal pressure because the nominal pressure can only indicate that the trap body is under pressure, and the nominal pressure and working pressure of the trap are very different. So according to the work pressure to select the trap displacement. The working pressure difference is the difference between the working pressure before the trap and the back pressure of the trap outlet. The back pressure of the trap is calculated as: (When the trap is discharged into the atmosphere, the outlet pressure of the trap is zero.) If the condensate discharged from the trap is concentrated, the outlet pressure of the trap Is the resistance of the return pipe, the height of the return pipe, the secondary evaporator (return tank) within the pressure of the three.
3. Mechanical trap type and thermostat type selection:
Mechanical traps according to the different working pressure section, divided into a variety of specifications of the valve seat "valve seat", each working pressure section and the "seat number" to form a coordinate curve of the displacement, different "seat "The amount of hydrophobic is very different. Mechanical traps should be based on the process conditions of the maximum working pressure and the maximum displacement of the corresponding coordinate curve to choose the appropriate "seat number." Can not be nominal pressure to set the "seat number", if the wrong "valve seat", there may be a trap does not work or equipment, water, affecting the normal operation of equipment.
Steam pipe in the selection of thermal static trap to use according to the use of steam pipe selection. There is a change in the pressure of the trachea at night, and the steam temperature can also change. Directly used to empty the use of steam pipes, condensate production is relatively small, and condensate is high temperature and high efficiency of the liquid can also be used to heat, you can use adjustable bellows or adjustable bimetallic (suitable for pressure instantaneous fluctuations Big).
4. Traps operating temperature:
When using the trap, according to the maximum temperature of the pipeline steam to select the process to meet the requirements of the trap. The maximum temperature of the pipe steam exceeds the nominal pressure corresponding to the saturated steam temperature is called superheated steam, in the superheated steam pipe selection trap, should use high temperature and high pressure superheated steam trap.
5. Traps connection size:
After the process conditions of the trap are determined, the size of the trap will be selected according to the technical parameters of the manufacturer of the trap according to the working pressure difference, the amount of hydrophobic and the "valve seat" before and after the trap. (Can not be connected according to the size of the equipment to choose the same size of the trap, the trap diameter can not represent the size of the amount of hydrophobic, the same diameter traps, hydrophobic capacity may vary widely; so the choice of traps must be based on the equipment Process conditions, with reference to the parameters provided by the manufacturer of the trap to choose the trap is the right choice.
6. Traps and standards for traps
The connection of the traps is socketed, threaded and flanged in three ways as well as the corresponding standard. The traps of the traps are basically made of welded or threaded flanged traps.
In the selection of the trap must follow the following conditions, because the equipment in the car and the normal operation of the amount of condensate generated a relatively large difference, so the choice of traps, the equipment must be consumed by the hourly consumption of the machine multiplier 2-3 times the maximum condensate water, to select the trap displacement. In order to ensure that the trap can be discharged as soon as possible when the condensate, quickly increase the temperature of heating equipment. Trap exhaust energy is not enough, will cause condensate can not be discharged in a timely manner, reducing the thermal efficiency of heating equipment.
1. The amount of hydrophobic trap:
When selecting a trap, the displacement of the trap must be selected by multiplying the steam consumption of the equipment by the frequency of 2-3 times the maximum condensing water. In order to ensure that the trap can be discharged as soon as possible when the condensate, quickly increase the temperature of heating equipment. Trap exhaust energy is not enough, will cause condensate can not be discharged in a timely manner, reducing the thermal efficiency of heating equipment. (When the steam heating device just started feeding, the equipment is cold, the interior is full of air, need to trap the air quickly discharged, and then row a large number of low-temperature condensate, the equipment gradually heat up, and then enter the normal working conditions. , A large amount of air and low temperature condensate, the lower inlet pressure, so that the trap overload operation, this time the trap requirements than normal work when the displacement is large, so press the magnification 2-3 times to select the trap.
2. The working pressure of the trap:
When selecting a trap, the trap can not be selected at nominal pressure because the nominal pressure can only indicate that the trap body is under pressure, and the nominal pressure and working pressure of the trap are very different. So according to the work pressure to select the trap displacement. The working pressure difference is the difference between the working pressure before the trap and the back pressure of the trap outlet. The back pressure of the trap is calculated as: (When the trap is discharged into the atmosphere, the outlet pressure of the trap is zero.) If the condensate discharged from the trap is concentrated, the outlet pressure of the trap Is the resistance of the return pipe, the height of the return pipe, the secondary evaporator (return tank) within the pressure of the three.
3. Mechanical trap type and thermostat type selection:
Mechanical traps according to the different working pressure section, divided into a variety of specifications of the valve seat "valve seat", each working pressure section and the "seat number" to form a coordinate curve of the displacement, different "seat "The amount of hydrophobic is very different. Mechanical traps should be based on the process conditions of the maximum working pressure and the maximum displacement of the corresponding coordinate curve to choose the appropriate "seat number." Can not be nominal pressure to set the "seat number", if the wrong "valve seat", there may be a trap does not work or equipment, water, affecting the normal operation of equipment.
Steam pipe in the selection of thermal static trap to use according to the use of steam pipe selection. There is a change in the pressure of the trachea at night, and the steam temperature can also change. Directly used to empty the use of steam pipes, condensate production is relatively small, and condensate is high temperature and high efficiency of the liquid can also be used to heat, you can use adjustable bellows or adjustable bimetallic (suitable for pressure instantaneous fluctuations Big).
4. Traps operating temperature:
When using the trap, according to the maximum temperature of the pipeline steam to select the process to meet the requirements of the trap. The maximum temperature of the pipe steam exceeds the nominal pressure corresponding to the saturated steam temperature is called superheated steam, in the superheated steam pipe selection trap, should use high temperature and high pressure superheated steam trap.
5. Traps connection size:
After the process conditions of the trap are determined, the size of the trap will be selected according to the technical parameters of the manufacturer of the trap according to the working pressure difference, the amount of hydrophobic and the "valve seat" before and after the trap. (Can not be connected according to the size of the equipment to choose the same size of the trap, the trap diameter can not represent the size of the amount of hydrophobic, the same diameter traps, hydrophobic capacity may vary widely; so the choice of traps must be based on the equipment Process conditions, with reference to the parameters provided by the manufacturer of the trap to choose the trap is the right choice.
6. Traps and standards for traps
The connection of the traps is socketed, threaded and flanged in three ways as well as the corresponding standard. The traps of the traps are basically made of welded or threaded flanged traps.