CN203395583U - Compressed air system for thermal power plant - Google Patents
Compressed air system for thermal power plant Download PDFInfo
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- CN203395583U CN203395583U CN201320434705.5U CN201320434705U CN203395583U CN 203395583 U CN203395583 U CN 203395583U CN 201320434705 U CN201320434705 U CN 201320434705U CN 203395583 U CN203395583 U CN 203395583U
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- instrument
- air compressor
- ash disposal
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- service
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Abstract
The utility model relates to a compressed air system for a thermal power plant. The compressed air system comprises a plurality of instrument station air compressors, a plurality of dust removal low-pressure air compressors and at least one standby maintenance air compressor. Outlet pressure of the instrument station air compressors and outlet pressure of the standby maintenance air compressors are both higher than the outlet pressure of the dust removal low-pressure air compressors. Outlets of the instrument station air compressors are all connected to an instrument gas master pipe. Outlets of the dust removal low-pressure air compressors are all connected to a dust removal master pipe. Outlets of the standby maintenance air compressors are all connected to a standby master pipe. One end of the standby master pipe is connected with the instrument gas master pipe through a first electric valve and a check valve, and the other end of the standby master pipe is connected with the dust removal master pipe through a second electric valve and a relief valve. The compressed air system has unchanged safety and reliability; standby machines are simple to switch; the compressed air system is power saving, low in construction cost and low in operational cost.
Description
[technical field]
The utility model relates to compressed air system technical field, the compressed air system that particularly in the factories such as thermal power plant, power station or power house of employing coal fired boiler, process system is used.
[background technique]
At present, domestic thermal power plant, the power station that adopts coal fired boiler or power house are Wei Quan factory concentrated setting compressed air system mostly, the unified air compressor that adopts, as source of the gas generation equipment, provides instrument in factory to carry the gas such as use gas or desulfurization with control use gas, maintenance use gas, ash disposal strength.The unified configuration of air compressor Wei Quan factory, outlet pressure adopts 0.75MPa～0.85MPa, instrument is carried with air compressor and is merged guest machine is set by station-service air compressor and ash disposal strength, be that instrument is established 1 overhaul reserve air compressor and 1 standby air compressor of operation with station-service air compressor each unit except operation machine, 1 overhaul reserve air compressor and 1 standby air compressor of ash disposal wherein merge as public standby.In factory, instrument carries the female pipe of use gas air feed to separate with controlling use gas, maintenance use gas and ash disposal strength, sets up equipment for after-treatment and gas holder separately.
During above-mentioned compressed air system operation, all need to guarantee that air compressor outlet main-piping pressure is not less than 0.70MPa～0.80MPa, when surpassing setting pressure, air compressor is shut down, air compressor start during lower than setting pressure.In fact ash disposal carries the pressure of use gas only need to meet and be not less than 0.30MPa～0.40MPa, Ash Conveying System is for reducing supply gas pressure, restricting orifice decompression is all set in system air feed inlet ductwork, has caused like this innocent person of compressed air system equipment energy consumption to increase.
[model utility content]
The purpose of this utility model is to provide a kind of thermal power plant compressed air system, take while solving as different supply gas pressure equipment air feed, causes the not guilty problem increasing of compressed air system equipment energy consumption.
To achieve these goals, the utility model adopts following technological scheme:
A compressed air system, comprises station-service air compressor for some instrument, some ash disposal low pressure air compressor and at least one overhaul reserve air compressors; Instrument is all connected to the female pipe of instrument use gas with the outlet of station-service air compressor, and ash disposal is all connected to the female pipe of ash disposal with the outlet of low pressure air compressor, and the outlet of overhaul reserve air compressor is connected to standby female pipe; On the female pipe of instrument use gas, be connected with station-service bronchus, station-service bronchus connects some station-service gas holder, and station-service bronchus is provided with the 3rd mortor operated valve; The female pipe of described instrument use gas is connected with some instrument equipment for after-treatments by pipeline, and described instrument connects some instrument gas holder with equipment for after-treatment by pipeline; The female pipe of ash disposal is connected with some ash disposal equipment for after-treatments by pipeline, and ash disposal equipment for after-treatment connects some ash disposal gas holder by pipeline.
The utility model further improves and is: instrument is all greater than the outlet pressure of low pressure air compressor for ash disposal with the outlet pressure of station-service air compressor and overhaul reserve air compressor.
The utility model further improves and is: standby Mu Guan one end is connected the female pipe of instrument use gas by the first mortor operated valve with safety check, and the other end is connected the female pipe of ash disposal by the second mortor operated valve with reduction valve.
The utility model further improves and is: the equal 0.75MPa～0.85MPa of outlet pressure of station-service air compressor and overhaul reserve air compressor for instrument; Ash disposal is 0.40MPa～0.50MPa with the outlet pressure of low pressure air compressor.
The utility model further improves and is: described some instrument comprise at least one standby instrument station-service air compressor with station-service air compressor; Some ash disposal with in low pressure air compressor when operation low pressure air compressor number of units is 4 and comprise at least one standby ash disposal low pressure air compressor when above, ash disposal low pressure air compressor for equipment not while moving 1～3 of number of units.
The utility model further improves and is: the female pipe of instrument use gas is provided with the first pressure transmitter, the female pipe of ash disposal is provided with the second pressure transmitter; Instrument is provided with the 3rd pressure transmitter with the outlet stool of gas holder, and the outlet stool of ash disposal gas holder is provided with the 4th pressure transmitter.
With respect to prior art, the utlity model has following beneficial effect: it is the air compressor of 0.75MPa～0.85MPa that the utility model China National Instruments Import & Export Corporation adopts conventional outlet pressure with station-service air compressor, and ash disposal air compressor adopts the low pressure air compressor that outlet pressure is 0.40MPa～0.50MPa, public standby air compressor adopts the air compressor of 0.75MPa～0.85MPa.In factory, instrument and control use gas, maintenance use gas and ash disposal strength are carried between the female pipe of use gas air feed and are adopted electronic separating valve to separate, instrument adopts 0.75MPa～0.85MPa equipment for after-treatment and gas holder with station-service gas, and ash disposal strength carries use gas to adopt 0.40MPa～0.50MPa equipment for after-treatment and gas holder.Public standby air compressor is switched and can be connected to the female pipe of station-service gas or the female pipe of ash disposal conveying use gas for instrument by electric valve, realizes standby.Adopt low pressure air compressor equipment power of motor than conventional air compressor, can reduce approximately 1/3 complete machine power, greatly reduce operation power consumption.For rate of discharge 40Nm<sup TranNum="69">3</sup>/ min～50Nm<sup TranNum="70">3</sup>the air compressor of/min, conventional air compressor motor power is greater than 200kW need to select high-voltage motor, and low pressure air compressor still can adopt voltage 380V low voltage motor, also more conventional air compressor is low for whole buying expenses.The utility model system security reliability remains unchanged, and guest machine handover operation is simple, electricity saving and energy saving, and engineering cost is low, and operating cost is low.
[accompanying drawing explanation]
Fig. 1 is the structural representation of a kind of thermal power plant of the utility model compressed air system.
[embodiment]
As shown in Figure 1, a kind of thermal power plant of the utility model compressed air system, comprises 9 air compressors: 3 conventional 1,2 operations of station-service air compressor for instrument of outlet pressure 0.75MPa～0.85MPa, and 1 operation is standby; 52,4 operations of low pressure air compressor for outlet pressure 0.40MPa～0.50MPa ash disposal, 1 operation is standby; The conventional overhaul reserve air compressor 3 of 1 outlet pressure 0.75MPa～0.85MPa is the public overhaul reserve machine with station-service gas and ash disposal use gas as instrument.Equipment for after-treatment instrument use gas is established 4,2 operations of equipment for after-treatment for 3 instrument, and 1 standby; Ash disposal use gas is established 5,4 operations of 5 ash disposal equipment for after-treatments, and 1 standby.Gas holder is established 7,2 ash disposal gas holder 8 of 6,2 station-service gas holder of gas holder for 2 instrument.
3 instrument are all connected to 102,5 ash disposal of the female pipe of instrument use gas with the outlet of station-service air compressor 1 and with the outlet of low pressure air compressor 2, are all connected to that ash disposal is female manages 101; The outlet of overhaul reserve air compressor 3 is connected to standby female pipe 103; Standby female Guan103 one end is connected the female pipe 102 of instrument use gas by the first mortor operated valve 9 with safety check 11, the other end is connected the female pipe 101 of ash disposal by the second mortor operated valve 10 with reduction valve 12; Station-service bronchus connects the female pipe 102 of instrument use gas and station-service gas holder 7, and station-service bronchus is provided with the 3rd mortor operated valve 13; Instrument connects the female pipe 102 of instrument use gas and gas holder 6 for instrument with equipment for after-treatment 4 by pipeline; Ash disposal equipment for after-treatment 5 connects the female pipe 101 of ash disposal and ash disposal gas holder 8 by pipeline.
During normal operation, the first mortor operated valve 9 is full-gear, and the second mortor operated valve 10 is full-shut position.11, safety check allows air to flow to the female pipe 102 of instrument use gas from the female pipe 101 of ash disposal, does not allow reverse flow, guarantees that instrument use gas main-piping pressure is not subject to the impact of ash disposal use gas main-piping pressure fluctuation.When instrument has 1 to break down with station-service air compressor 1, move standby instrument station-service air compressor, system continues operation, and when instrument occurs 2 faults with station-service air compressor 1, overhaul reserve air compressor 3 puts into operation; When ash disposal has 1 to break down with low pressure air compressor 2, move standby ash disposal low pressure air compressor, system continues operation, when occurring 2 faults except ash disposal with low pressure air compressor 2, decision instrument has fault-free with station-service air compressor 1, when decision instrument is with after station-service air compressor 1 fault-free, close the first mortor operated valve 9, open the second mortor operated valve 10, start overhaul reserve air compressor 3, pressurized air is reduced to 0.40MPa～0.50MPa by overhaul reserve air compressor 3 outlet air pressure from 0.75MPa～0.85MPa by reduction valve 12, is consistent with ash disposal use gas main-piping pressure.In service by instrument use gas female pipe upward pressure transmitter 14 and ash disposal use gas main-piping pressure transmitter 15 supervision main-piping pressures, according to main-piping pressure regulating and controlling instrument, with station-service air compressor 1 and ash disposal, use operation number of units and the operating load of low pressure air compressor 2, hypotony is sent alarm signal.On station-service gas branch pipe, establishing mortor operated valve 13, is full-gear when normal, when the female pipe of instrument use gas 102 hypotony, cannot recover Huo Quan factory while there is chaser accident, and the chain mortor operated valve 13 of cutting out, preferentially guarantees full factory instrument gas immediately.At instrument, with gas holder 6 and ash disposal gas holder 8 outlet stools, establish pressure transmitter 16,17,18,19, monitor in real time each effective gas situation.
When air compressor normally moves, standby with station-service compressor operation with needing to ensure 1 instrument station-service air compressor except two instrument of operation, 1 overhaul reserve air compressor 3 is standby.
If arrange ash disposal by low pressure air compressor 2 number of units more than 5, operation ash disposal is 4 and when above with low pressure air compressor 2, embodiment is the same.If setting, except ash disposal is less than 5 with low pressure air compressor 2, when operation ash disposal is 1～3 by low pressure air compressor 2 number of units, does not arrange separately ash disposal low pressure air compressor, only the guest machine using overhaul reserve air compressor 3 as ash disposal use gas.When ash disposal, break down and instrument during by station-service air compressor 1 fault-free with low pressure air compressor 2, can start overhaul reserve air compressor 3 by above-mentioned steps to use as ash disposal use gas, other mode of executions are the same.
Claims (6)
1.Yi Zhong thermal power plant compressed air system, is characterized in that, comprises some station-service air compressors (1) for instrument, some low pressure air compressors for ash disposal (2) and at least one overhaul reserve air compressors (3); The outlet of station-service air compressor for instrument (1) is all connected to the female pipe of instrument use gas (102), and the outlet of low pressure air compressor for ash disposal (2) is all connected to the female pipe of ash disposal (101), and the outlet of overhaul reserve air compressor (3) is connected to standby female pipe (103); On the female pipe of instrument use gas (102), be connected with station-service bronchus, station-service bronchus connects some station-service gas holder (7), and station-service bronchus is provided with the 3rd mortor operated valve (13); The female pipe of described instrument use gas (102) is connected with some equipment for after-treatments (4) for instrument by pipeline, described for instrument equipment for after-treatment (4) by pipeline, connect some gas holder (6) for instrument; The female pipe of ash disposal (101) is connected with some ash disposal equipment for after-treatments (5) by pipeline, and ash disposal equipment for after-treatment (5) connects some ash disposal gas holder (8) by pipeline.
2. a kind of thermal power plant according to claim 1 compressed air system, is characterized in that, the outlet pressure of station-service air compressor for instrument (1) and overhaul reserve air compressor (3) is all greater than the outlet pressure of low pressure air compressor for ash disposal (2).
3. a kind of thermal power plant according to claim 1 compressed air system, it is characterized in that, standby female pipe (103) one end is connected the female pipe of instrument use gas (102) by the first mortor operated valve (9) with safety check (11), the other end is connected the female pipe of ash disposal (101) by the second mortor operated valve (10) with reduction valve (12).
4. a kind of thermal power plant according to claim 1 compressed air system, is characterized in that, the equal 0.75MPa～0.85MPa of outlet pressure of station-service air compressor (1) and overhaul reserve air compressor (3) for instrument; The outlet pressure of low pressure air compressor for ash disposal (2) is 0.40MPa～0.50MPa.
5. a kind of thermal power plant according to claim 1 compressed air system, is characterized in that, described for some instrument station-service air compressor (1) comprise at least one standby instrument station-service air compressor; In some low pressure air compressors for ash disposal (2) when operation low pressure air compressor number of units is 4 and comprise at least one standby ash disposal low pressure air compressor when above, ash disposal low pressure air compressor for equipment not when moving number of units and being 1～3.
6. a kind of thermal power plant according to claim 1 compressed air system, is characterized in that, the female pipe of instrument use gas (102) is provided with the first pressure transmitter (14), the female pipe of ash disposal (101) is provided with the second pressure transmitter (15); The outlet stool of gas holder for instrument (6) is provided with the 3rd pressure transmitter, and the outlet stool of ash disposal gas holder (8) is provided with the 4th pressure transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320434705.5U CN203395583U (en) | 2013-07-19 | 2013-07-19 | Compressed air system for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320434705.5U CN203395583U (en) | 2013-07-19 | 2013-07-19 | Compressed air system for thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203395583U true CN203395583U (en) | 2014-01-15 |
Family
ID=49907115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320434705.5U Expired - Lifetime CN203395583U (en) | 2013-07-19 | 2013-07-19 | Compressed air system for thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203395583U (en) |
-
2013
- 2013-07-19 CN CN201320434705.5U patent/CN203395583U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE OF CHINA Free format text: FORMER NAME: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE, CHINA POWER ENGINEERING CONSULTING GROUP CORPORATION |
|
| CP03 | Change of name, title or address |
Address after: 22 No. 710075, unity South Road, hi tech Industrial Development Zone, Shaanxi, Xi'an Patentee after: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. OF CHINA POWER ENGINEERING CONSULTING Group Address before: 710075 Xi'an province high tech Development Zone, unity South Road, No. 22, No. Patentee before: NORTHWEST ELECTRIC POWER DESIGN INST. OF CHINA POWER ENGINEERING CONSULTING Group |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140115 |