CN206860421U - Compressed air process units - Google Patents
Compressed air process units Download PDFInfo
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- CN206860421U CN206860421U CN201720516398.3U CN201720516398U CN206860421U CN 206860421 U CN206860421 U CN 206860421U CN 201720516398 U CN201720516398 U CN 201720516398U CN 206860421 U CN206860421 U CN 206860421U
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- frequency converter
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Abstract
The utility model discloses a kind of compressed air process units, it is main for air compressor, frequency converter, baroceptor, more stand-by compressors, PLC including 1, it is main to be driven for air compressor for low-tension motor, the baroceptor is connected with frequency converter, the power input of the frequency converter is connected with low-tension supply, the power output end of the frequency converter is connected with main confession air compressor, and the main confession air compressor carries out speed regulating control by frequency converter；It is described it is main for air compressor, capacity≤compressed air process units gross exhaust gas of each compressor of stand-by compressor 15%, the stand-by compressor is connected by breaker with power supply, the baroceptor is connected with PLC, and the PLC controls circuit-breaker switching on-off.The utility model is main to one to be controlled for machine using low-voltage variable frequency, and investment all uses VFC far below high-pressure frequency-conversion control or each air compressor, can significantly reduce investment.
Description
Technical field
A kind of compressed air process units is the utility model is related to, belongs to technical field of power equipment.
Background technology
Compressed air belongs to important power facility in the production of many industries.Compressed air process units is commonly referred to as
For air compression station (room), when designing its capacity, maximum is that apolegamy air compressor is vented with gas demand and with atmospheric pressure
The Main Basiss of amount and pressure at expulsion, while consider appropriate load factor.For energy-saving and emission-reduction, except requiring air compressor
Possess and hold outside conditioning function, popularity frequency control.
For example, the compressed air process units gross exhaust gas of design is 300m3/ min, pressure at expulsion 0.90MPa.If
Only 1 or 2 air compressors of selection, single motor power is all very big, and the power of starting device and converter plant is also corresponding
It is very big.In the case where the fluctuation of compressed air usage amount is larger, if the air compressor number of units of apolegamy is few, it is unfavorable for saving；
Even if matching more air compressors, manually also it is difficult to by operator on duty by the unit quantity to be put into operation with the regulation of gas demand.
In gas consumption very little, although the appearance conditioning function of air compressor can be by unit air inlet adjustment close to zero, frequency converter can be by unit
Rotating speed minimizes, but certain power consumption still be present.Therefore, it is necessary to innovate a kind of compressed air process units, excavate
The energy-saving potential of compressed air process units, it is ensured that reliable air supply and realize economical operation.
Utility model content
The purpose of this utility model is to provide a kind of compressed air process units, is easy to carry out intelligentized control method, improves
Unit reserve ability, compressed air production reliability is improved, is easy to carry out maintaining to unit；Can be by the sky of unloaded or low load
Air compressor withdraws from operation, beneficial to energy-conservation and extends unit durability.
The purpose of this utility model is achieved by the following technical programs：
A kind of compressed air process units, including 1 it is main for air compressor 1, frequency converter 2, baroceptor 3, more
Stand-by compressor 4, PLC 5, main to be driven for air compressor 1 for low-tension motor, the baroceptor 3 and frequency converter
2 are connected, and the power input of the frequency converter 2 is connected with low-tension supply, and the power output end of the frequency converter 2 supplies air with main
Compressor 1 is connected, and the main confession air compressor 1 carries out speed regulating control by frequency converter 2；It is described main for air compressor 1, standby
The 15% of the capacity of air compressor 4≤compressed air process units gross exhaust gas, the stand-by compressor 4 pass through disconnected
Road device is connected with power supply, and the baroceptor 3 is connected with PLC 5, and the PLC 5 controls circuit-breaker switching on-off.
The purpose of this utility model can also further be realized by following technical measures：
Aforementioned compression air process units, wherein stand-by compressor 4 are driven by the high-tension motor that voltage is 10kV,
The breaker is high-pressure vacuum breaker.
Compared with prior art, the beneficial effects of the utility model are：
More air compressors are matched to be easy to carry out intelligentized control method；Confession machine main to one is only needed to use low-voltage variable frequency control
System, and power is smaller, investment all uses VFC far below high-pressure frequency-conversion control or each air compressor, can significantly reduce
Investment；The power of separate unit machine is smaller, and impact of the starting current to power distribution network is small；Unit reserve ability is strong, produces compressed air
Reliability is high；It is easy to carry out maintaining to unit；The air compressor of unloaded or low load can be withdrawn from operation, beneficial to energy-conservation and
Extend unit durability.
Brief description of the drawings
Fig. 1 is of the present utility model main for air compressor circuit figure；
Fig. 2 is stand-by compressor circuit diagram of the present utility model.
Embodiment
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, compressed air process units of the present utility model, including 1 main confession air compressor 1, frequency converter
2nd, baroceptor 3, more stand-by compressors 4, PLC 5, it is main to be driven for air compressor 1 for low-tension motor, it is described
Baroceptor 3 is connected with frequency converter 2, and the power input of the frequency converter 2 is connected with low-tension supply, the frequency converter 2
Power output end is connected with main confession air compressor 1, and the main confession air compressor 1 carries out speed regulating control by frequency converter 2；It is described
Main capacity≤compressed air process units gross exhaust gas for air compressor 1,4 each compressor of stand-by compressor
15%, as described in Figure 2, the stand-by compressor 4 is connected by breaker with power supply, the baroceptor 3 and PLC 5
It is connected, the PLC 5 controls circuit-breaker switching on-off.Aforementioned compression air process units, when the separate unit work(of stand-by compressor 4
Rate >=250KW and during larger radius of electricity supply, stand-by compressor 4 is driven by the high-tension motor that voltage is 10kV, described disconnected
Road device is high-pressure vacuum breaker, and baroceptor 3 gathers pressure signal from main air accumulator (or major network pipeline).
Specific embodiment is as follows, is by 300m3/min, pressure at expulsion of compressed air process units gross exhaust gas
Exemplified by 0.90MPa, it is 41m that 8 capacities, which may be selected,3/ min, the air compressor that pressure at expulsion is 1.02MPa, motor
Power is 250/300KW.(No. 1 machine apolegamy rated voltage is 0.4kV low-tension motors to wherein 1 main confession machine, is adjusted by converter plant
Speed), (2-8 machines apolegamy rated voltage is 10kV high-tension motors to remaining 7 guest machine, and high-pressure vacuum contactor is controlled by PLC
Point/close a floodgate).
Matching the main function of more air compressors is:(1) it is easy to carry out intelligentized control method；(2) only need to one
It is main to be controlled for machine using low-voltage variable frequency, and power is smaller, investment is all adopted far below high-pressure frequency-conversion control or each air compressor
With VFC, investment can be significantly reduced；(3) power of separate unit machine is smaller, and impact of the starting current to power distribution network is small；(4) machine
Group marginal capacity is strong, and the reliability for producing compressed air is high；(5) it is easy to carry out maintaining to unit；(6) can will be unloaded or low
The air compressor of load withdraws from operation, beneficial to energy-conservation and extends unit durability.
As guest machine separate unit power >=250KW and larger radius of electricity supply, it is using the major advantage of high-tension motor:
(1) line loss is greatly reduced；(2) it is easy to across-the-line starting；(3) impact to power distribution network is small.
Main to carry out rotational speed regulation according to the sampling air pressure signal of input by frequency converter for machine, the pressure set points of frequency converter are
The system pressure standard value, the value if sampling air pressure is above standard, frequency converter subtracts frequency, if sampling air pressure is less than standard value, frequency converter
Increase frequency.Frequency converter is by 20HZ → 50HZ or regulating time requirement≤15S by 50HZ → 20HZ.
Sampling air pressure signal and unit situation of the guest machine by PLC according to input, are started or stop controlling, PLC's
Upper pressure limit and lower limit set value, using the allowed band of just conventional gas as foundation.
The delay time that each guest machine (2--8 machines) starts or stopped, can be according to the model for allowing air pressure fluctuation with gas scene
Enclose and set.The starting time of each guest machine should have interval (generally 1-5min), to avoid under sampling air pressure is in
In limited time, each guest machine starts simultaneously；Each guest machine accumulated running time is set to record in PLC, when sampling air pressure is in the upper limit
When, according to the length of each guest machine accumulated running time, fortune is withdrawn from into the first delay (generally 3-5min) of long operational time
OK, so that each guest machine accumulated running time is substantially balanced.
The operation information of each unit, including voltage, electric current, frequency, rotating speed, input power, motor temperature rise, cooling device,
The operational factors such as output pressure, communication interface can be carried from unit and is gathered from high and low pressure switchboard, except can be in addition to PLC
On the display screen connect outside Dynamic Announce, when abnormal situation occurs in operation, it can in time be prompted and be exported by PLC to alarm
And control signal.
In addition to the implementation, the utility model can also have other embodiment, all to use equivalent substitution or equivalent change
The technical scheme to be formed is changed, is all fallen within the protection domain of the requires of the utility model.
Claims (2)
1. a kind of compressed air process units, it is characterised in that main for air compressor, frequency converter, air pressure sensing including 1
Device, more stand-by compressors, PLC, main to be driven for air compressor for low-tension motor, the baroceptor and frequency conversion
Device is connected, and the power input of the frequency converter is connected with low-tension supply, and the power output end of the frequency converter supplies air with main
Compressor is connected, and the main confession air compressor carries out speed regulating control by frequency converter；It is described main for air compressor, dedicated air
The 15% of the capacity of each compressor of compressor≤compressed air process units gross exhaust gas, the stand-by compressor leads to
Cross breaker with power supply to be connected, the baroceptor is connected with PLC, and the PLC controls circuit-breaker switching on-off.
2. compressed air process units as claimed in claim 1, it is characterised in that the stand-by compressor is by voltage
10kV high-tension motor driving, the breaker is high-pressure vacuum breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720516398.3U CN206860421U (en) | 2017-05-10 | 2017-05-10 | Compressed air process units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720516398.3U CN206860421U (en) | 2017-05-10 | 2017-05-10 | Compressed air process units |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206860421U true CN206860421U (en) | 2018-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720516398.3U Active CN206860421U (en) | 2017-05-10 | 2017-05-10 | Compressed air process units |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023473A (en) * | 2017-05-10 | 2017-08-08 | 江苏省镇江船厂（集团）有限公司 | Compressed air process units |
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2017
- 2017-05-10 CN CN201720516398.3U patent/CN206860421U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023473A (en) * | 2017-05-10 | 2017-08-08 | 江苏省镇江船厂（集团）有限公司 | Compressed air process units |
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