The technology is working in a vertical and horizontal sequence, and 8 towers are regenerated.
The wet compressed air from the compressor is separated by water after separation by the separator, and then enters the drying tower through the shuttle valve 1 into the working state of the tower. The moisture in the air is absorbed by the desiccant in the tower, and the air flow after drying After going to the top, it is divided into two sub-streams, some of which pass through the shuttle valve 10 to the filter about 85, and are filtered for the user to use; the other part of the gas flows through the fixed throttle about 15 ,, and then flows into the 8 towers, The desiccant of the 8 towers is desorbed and regenerated, and then vented through the muffler through the pneumatic shut-off valve 22, and the 3 towers are in a regenerative state. In this sequence, the solenoid valve 42 is energized, the pneumatic shut-off valve 22 opens the solenoid valve 41 to be de-energized, the pneumatic shut-off valve 41 is closed, and the charging solenoid valve 12 is closed.
The order of the tower works, and the 8 towers are pressurized.
After 4 minutes and 20 seconds of sequential operation, the solenoid valve 42 is de-energized, the pneumatic shut-off valve 22 is closed, and the charging solenoid valve 12 is energized to open. At this time, the dry airflow enters the drying tower through the fixed throttle and the charging solenoid valve so that the eight towers are in the prescribed sequence, the electromagnetic valve 4142 is powered off, the pneumatic shut-off valve 21 22 is closed, and the charging solenoid valve 12 is energized to open.
The sequence tower works and the tower regenerates.
After 40 seconds of operation, the solenoid valve 41 is energized, the pneumatic shut-off valve 21 is opened, the tower pressure is rapidly lowered, and the air outlet of the shuttle valve 1 is reversed. At this time, the 8 towers are in operation and the tower is in a regenerative state. In this brewing, the solenoid valve 41 is energized, the pneumatic shut-off valve 21 is opened, the electromagnetic 042 is turned off, the pneumatic shut-off valve 42 is closed, and the charging solenoid valve 12 is closed.
2.4 It is easier to set the control parameters. 0 30! The general logic control module can set and modify parameters directly on its operating unit, and requires the programming tool to complete the modification of the parameters.
2.5 price ratio, to be cheaper, the production cost is relatively low.
The process of the non-heat regenerative dryer is a heat-free regenerative dryer which is a compressed air after-treatment device. According to the principle of pressure swing adsorption, the compressed air is dried and dehumidified by a countercurrent self-heating regeneration method to remove the moisture in the air. Thereby obtaining relatively pure dry air. The work is mainly divided into two processes of adsorption and regeneration, which are alternately completed by two drying towers. The working cycle is 10 minutes. The cycle includes the following sequence of actions. The application is controlled by a non-thermal regenerative dryer. Our company introduced American technology since 1989. The production of non-thermal regenerative compressed air dryer, the original control system also uses the cam program controller imported from the United States, its control time process error is large, the top is easy to fall off during control operation and affect the stability of the whole system. I decided to carry out technical improvement and innovation in the heatless regenerative dryer control system produced by our company, using the latest general logic control module 60 developed by SIEMENS of Germany! As the core control component, the control system is adapted to the automatic alternating operation, and the reasonable control of the heatless regenerative dryer is realized, which completely replaces the traditional mechanical cam program controller and obtains better use effect.
0300! It is a new universal logic control module of 8 positive 1 milk company, which integrates time relay triggers. The clock is equal to the body, achieving various logic control functions, compared with the current industry's more popular 10 programmable controllers, 1000! The universal logic control module fills the technical space between the relays and has been developed into a modular standard component, and its performance is also superior! Through the integration of 8 basic functions and 26 special features, 0300!
It can replace hundreds of switching devices, from time relays to contactors. The new modular to 300! It saves space in the control cabinet and requires fewer attachments to reduce inventory and allows for flexible expansion at any time, depending on your mission needs. Therefore, 30! Not only saves production costs, but also shortens engineering time by up to 70. Cut 00! The installation is simple and convenient, almost no wiring is required, and programming is extremely simple.
More worth mentioning is, 00! Has good vibration resistance and high electromagnetic compatibility, 3, fully in line with industry standards, can adapt to various domestic climatic conditions. 1000! It also achieved an 8-level radio interference suppression indicator and passed all necessary international certifications, therefore, 1000! Can be widely used in Dingye!
2.1 No special language is required, programming is relatively simple. LO 00! Set control function in the body, with operating unit and LCD display unit, the line can be directly from 000! The control unit is directly input and requires no programming tools.
2.2 The output current range is large, 000! It can withstand a resistive load of up to 10, and can only withstand 2 loads.
2.3 has a communication function. Part 0300! With 81 bus and wiring ports, it is easy to implement with peripheral expansion applications or remote control.
1000! In the non-heat regenerative compressed air dryer, the Wenyang Guobin sequence tower works and the tower is pressurized.
After 4 minutes and 20 seconds of sequential operation, the solenoid valve 41 is de-energized, the pneumatic shut-off valve 21 is closed, and the charging solenoid valve 12 is opened. At this time, the dry airflow enters the drying tower through the fixed throttle and the charging solenoid valve so that the 8 towers are in The pressure rises to the pressure of the tower within the specified time. In this sequence, the solenoid valve 4142 is de-energized, the pneumatic shut-off valve 2122 is closed, and the charging solenoid valve 12 is energized to open.
After 40 seconds of sequential operation, the dryer completes the cycle and moves to the next cycle.
Dry, the cycle of each cycle takes up the following time, the split is based on the heart, 芑, order, B. Work work ten note According to the actual situation, the charging time can be extended appropriately, but does not affect the performance of the whole machine.
Control system design 4.1 Hardware composition and control system principle According to the process requirements of the non-thermal regenerative dryer, the system output is controlled by the switch quantity. SIENEMS B 000! 2303 is selected as the core control component to form the control circuit, 13 respectively control The solenoid valve 13 and the line are simultaneously provided with a pressure protection temperature protection reset switch and an operating finger lamp according to the process requirements. When the start button 3 is pressed, the power is turned on, and the pressure switch controls the power of the entire control system. Only when the pressure reaches the set value, the control system is put into operation. When the pressure is lower than the set value, the control system will automatically stop. A reset switch connected to 000!1 is used to control the system to work from the beginning.
4.2 software design? 0! The software Xie Wei is simple, and the output signals of each program unit are outputted by the input unit. In the program design, from the output to the input, each skill will be lacking, and a complete control program can be formed. According to the requirements of the dry process flow, according to the turning of the technology, the horizontal and horizontal strips are connected to the telecommunications equipment room, and continue to extend to the telecommunications room on the floor. Also, the other strips are laid along the left side of the building to the telecommunications rooms. Branch wires need to be laid between the trunk and the grounding busbars of each telecommunications room. It should be noted that the two equipotential conductors cannot be connected separately at the final incoming point because the length of the conductor affects the impedance of the trunk conductor.
In general, surge protectors are installed in the telecommunications room, but it should be noted that only a reasonable design without proper installation will make the surge protector useless. Therefore, the following points should be noted during installation: the length of the grounding wire. During construction, the grounding wire of each level of surge protector should be arranged to be the shortest and straightest, because the unnecessary ground wire length will increase the total impedance, and the large voltage drop caused by high impedance will hinder the normal operation of the surge protector. In addition, the excessive grounding line plus the parallel resonance caused by the high-frequency transient overvoltage will cause the grounding to be the same as the open circuit; it is the path of the grounding wire. The grounding wire of the surge protector should be prevented from turning 90 degrees straight. The test shows that the four straight bend connections have a 10 times increase in voltage for the surge protector compared to the straight bend connection; it is important to note that the grounding conductor of the surge protector is kept away from the unshielded cable. Because the grounding wire and the unshielded cable will produce a capacitive coupling, so that the circuit that would otherwise not be damaged by lightning is disturbed; it is better to use multiple stranded strands instead of using a single strand of copper wire as the grounding wire. Because the area of ​​the stranded wire is large, the grounding of the generator is divided into the following cases: Grounding of the generator in the grounding system. There are two options for this grounding method, respectively. For the 3 scheme, it is recommended to use a very automatic transfer switch, ie 13, multiple generators can be safely installed in the system during construction. Note that the neutral to ground loop is disconnected at the pole 3 during installation. If the neutral point of the generator is grounded and a pole 8 is used, a parallel ground line neutral loop will be formed.
The neutral point is not grounded, and the neutral line is disconnected from the ground loop. This requires the voltage between the lines to be calibrated during installation, and the neutral line is selected according to the full load current. The coordination of the relay should be carefully adjusted during commissioning. . If the generator neutral point is also grounded, it will constitute a grounding line neutral line loop, which will cause the neutral current to be shunted to the ground line and grounding relay that did not pass current. At this time, even if there is no fault in the system, the power supply main breaker or the generator breaker is tripped because the grounding relay operates.
force. Grounding of multiple generators. If several generators are dispersed and installed in the power distribution system and have their own personnel 8, they can be handled as separate generator units when grounded. If there are multiple generators running in parallel in the power station and the power is supplied to the back or multiple lines through the station or multiple units, then the center point of these generators can be connected to the common grounding device during construction, such as the grounding mother of the switchboard. The steel mesh in the reinforced concrete or the steel structure of the building. When installing, pay attention to grounding at the generator outlet terminal, and install the arrester at the generator outlet terminal and the grounding wire should be as short and straight as possible.
4. Monitoring of ground fault leakage current With the increase of intelligent buildings and the improvement of industrial equipment performance. For this reason, attention should be paid to the monitoring of ground fault currents for buildings and equipment with high grounding requirements.
The way to monitor the fault current is to pass the phase and neutral wires through a current transformer. Current transformers are used to detect the instantaneous sum of the phase and neutral currents. If there is no leakage current to the ground in the system, the current sum detected by the current transformer should be approximately zero. If the phase load is unbalanced, the current difference will pass through the neutral line.
The method of monitoring the fault current depends on the installation position of the current transformer, and the following conditions can be monitored to monitor the trunk circuit containing the neutral line. This approach is feasible for small electrical systems with few devices. However, for large electrical systems, multiple current transformers are required, otherwise it is difficult to find the fault point.
3 Monitoring the neutral point of the transformer to the total ground terminal block is the phase and neutral line.
3 Monitor the current on the reference ground. This method is used to monitor electrical systems with a dedicated reference ground. In this way, the current transformer mounted on the reference ground line can not only monitor the leakage current, but also verify the insulation of the wiring faulty wire and the equipment connected to the reference ground wire.
4 Isolation transformer or noise suppression transformer secondary circuit monitoring. This method can monitor the insulation level of programmable controllers and other sensitive electronic devices for errors and for faults on the secondary circuit.
In conclusion, it is easy to see that the seemingly simple grounding system installation is actually not simple. In the design and installation of the grounding system, not only the theoretical line of the grounding system, but also the soil characteristics of the construction environment and the material and installation process of the grounding conductor of the method should be considered. Only in this way can a reliable grounding be achieved. In addition, the correct operation of the equipment can only be ensured by mastering the correct grounding resistance weighing technology and properly installing the ground fault current monitoring device.
5. Conclusion Use 000 in the control of our company's non-thermal regenerative dryer! The general logic module control reduces the wiring of a large number of relays and their circuits. Compared with the cam program control, the whole control system runs more reliably and stably. Compared with 1, the price is relatively cheap, and the programming and operation are simpler and more convenient.
0! The application of the logic control module on the non-heat regenerative dryer greatly improves the performance of the dryer, thereby reducing the maintenance cost of the equipment, ensuring reliable operation of the product and achieving an ideal control effect.
Siemens company 000 controller programming software, user manual Siemens. ,10 series non-heat regenerative compressed air dryer manual Liuzhou Liukong Machinery Co., Ltd. Author unit Guangxi Liuzhou Liukong Machinery Co., Ltd.
Construction machinery is the general name of the mechanical equipment used in construction and urban and rural construction. It consists of Concrete Mixer, rebar tying machine, Rebar Detection System , plastering machine , Concrete Pump , Steel bar bending machine , steel bar shearing machine , Concrete Vibrator, Concrete grouting machine and other mechanical components.
According to Chinese standards, Construction Machinery is divided into the following types:
(1) Excavating machinery: including single-bucket excavators, multi-bucket excavators, and backhoe loaders.
(2) Earthmoving machinery: bulldozers, scrapers, skippers, etc.
(3) compaction machinery: including road rollers, compactors, etc.
(4) Construction lifting appliances: including tower cranes, crawler cranes, construction elevators, etc.
(5) Piling machinery: including vibratory pile hammers, hydraulic hammers, and pile drivers.
(6) Road Machinery: Including asphalt sprinklers, asphalt concrete pavers, etc.
(7) Concrete machinery: concrete mixer, concrete mixers, concrete pumps, etc.
(8) Machinery for concrete products: Concrete block forming machines, hollow plate extrusion machines, etc.
(9) Reinforced steel and prestressed machinery: Including reinforcing steel reinforcement machinery, steel reinforcement forming machinery, reinforcing steel connection machinery, Rebar Detection System,rebar tying machine etc.
Construction Machinery
Construction Machinery,Concrete Vibrator,Floor Polishing Machine,Steel Bar Bending Machine
SHANDONG HENGWANG GROUP , https://www.hwmac.com