CN204313267U - Air and gas system - Google Patents
Air and gas system Download PDFInfo
- Publication number
- CN204313267U CN204313267U CN201420634509.7U CN201420634509U CN204313267U CN 204313267 U CN204313267 U CN 204313267U CN 201420634509 U CN201420634509 U CN 201420634509U CN 204313267 U CN204313267 U CN 204313267U
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- Prior art keywords
- flue gas
- air
- coal
- communicated
- powder boiler
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- 239000003546 flue gas Substances 0.000 claims abstract description 110
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 104
- 239000001301 oxygen Substances 0.000 claims abstract description 55
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 55
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 54
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000000843 powder Substances 0.000 claims abstract description 45
- 239000007789 gas Substances 0.000 claims abstract description 35
- 239000002817 coal dust Substances 0.000 claims abstract description 27
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 26
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 26
- 230000030279 gene silencing Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 17
- 238000006477 desulfuration reaction Methods 0.000 description 6
- 230000023556 desulfurization Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 231100000749 chronicity Toxicity 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002926 oxygen Chemical class 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Air Supply (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The utility model discloses a kind of air and gas system, comprising: coal-powder boiler, and this coal-powder boiler is connected with blower fan, and described blower fan is connected with air-suction duct; Coal dust device, this coal dust device is communicated with described coal-powder boiler with described blower fan respectively; Flue gas processing device, this flue gas processing device is communicated with described coal-powder boiler, and has flue gas heat-exchange unit; Flue gas condenser, the entrance of this flue gas condenser is communicated with described flue gas processing device, and the outlet of described flue gas condenser is communicated with described flue gas heat-exchange unit; Bypass, one end of this bypass is connected between described flue gas condenser and described flue gas processing device, and the other end is connected to described flue gas heat-exchange unit, and described flue gas heat-exchange unit is communicated with described blower fan; Note oxygen device, this note oxygen device is communicated with described coal dust device with described coal-powder boiler respectively.This air and gas system can take into account the dry circulating combustion of oxygen enrichment and the air burning of coal-powder boiler, thus effectively reduces the discharge capacity of carbon dioxide and reduce the processing cost of carbon dioxide.
Description
Technical field
The utility model relates to carbon dioxide discharge-reduction technical field, particularly, relates to and a kind ofly can realize the dry circulating combustion of oxygen enrichment of coal-powder boiler and the air and gas system of air burning.
Background technology
In existing coal fired power plant, the discharge capacity of carbon dioxide is extremely huge, simultaneously, air and gas system for the treatment of flue gas is only applicable to air burning, i.e. blower fan air draught on the spot, for pulverized coal system processed and/or coal-powder boiler provide air, the flue gas of generation enters air through chimney after dedusting, desulfurization, heating (can select), although this discharging modes can reduce the discharge capacity of carbon dioxide etc., it still causes serious impact to atmospheric environment.
For this reason, there is a kind of oxygen-enriched combustion technology, this oxygen-enriched combustion technology all has superiority in investment operating cost, carbon dioxide discharge-reduction cost etc., it is a kind of carbon emission reduction technology with development potentiality, its main feature is: adopt flue gas recirculation, replaces the nitrogen in combustion air with the carbon dioxide in flue gas, participates in burning together with high-purity oxygen, improve the gas concentration lwevel in flue gas thus, thus reduce seizure and the compiling costs of carbon dioxide.
Simultaneously, the severe situation that energy resource structure based on coal determines the chronicity of China's carbon dioxide discharge-reduction work, uniqueness and faces, and mostly adopt the direct-firing system of coal-powder boiler due to existing power plant, therefore, day by day serious along with environmental pollution, needs to carry out corresponding transformation and upgrade to the air and gas system of existing power plant.
Utility model content
The purpose of this utility model is to provide a kind of air and gas system, and this air and gas system can take into account the dry circulating combustion of oxygen enrichment and the air burning of coal-powder boiler, thus effectively reduces the discharge capacity of carbon dioxide and reduce the processing cost of carbon dioxide.
To achieve these goals, the utility model provides a kind of air and gas system, and this air and gas system comprises: coal-powder boiler, and this coal-powder boiler is connected with blower fan, and described blower fan is connected with air-suction duct; Coal dust device, this coal dust device is communicated with described coal-powder boiler with described blower fan respectively; Flue gas processing device, this flue gas processing device is communicated with described coal-powder boiler, and has flue gas heat-exchange unit; Described air and gas system also comprises, flue gas condenser, and the entrance of this flue gas condenser is communicated with described flue gas processing device, and the outlet of described flue gas condenser is communicated with described flue gas heat-exchange unit; Bypass, one end of this bypass is connected between described flue gas condenser and described flue gas processing device, and the other end is connected to described flue gas heat-exchange unit, and described flue gas heat-exchange unit is communicated with described blower fan; Note oxygen device, this note oxygen device is communicated with described powdered fuel plant with described coal-powder boiler respectively.
Pass through technique scheme, when this air and gas system needs oxygen enrichment dry circulating combustion, close the air-suction duct that blower fan connects, open the communicating passage of blower fan and flue gas heat-exchange unit, close bypass, and open the entrance of flue gas condenser, open note oxygen device, thus by flue gas after dedusting, desulfurization and condensation dehydration, be recycled in coal-powder boiler and/or coal dust device after partial fume note oxygen, all the other flue gases then carry out smoke carbon dioxide capture or discharge as required; When this air and gas system needs air burning, open the air-suction duct that blower fan connects, close the communicating passage of blower fan and flue gas heat-exchange unit, open bypass, and close the entrance of flue gas condenser, close note oxygen device, thus make blower fan by air-suction duct air draught on the spot, for coal-powder boiler and/or coal dust device provide air, flue gas discharges after (selectively) through dedusting, desulfurization, heating.Like this, this air and gas system can select the dry circulating combustion of oxygen enrichment or air burning according to the actual requirements, and effectively reduce the discharge capacity of carbon dioxide and reduce the processing cost of carbon dioxide, and this air and gas system floor space is few, operating flexibility is high.
Preferably, the pipeline between described blower fan and described flue gas heat-exchange unit is connected with air door valve.
Preferably, the air-suction duct of described blower fan is connected with first and cut-offs valve and silencing means.
Preferably, control valve is provided with in the pipeline that described note oxygen device and described coal-powder boiler are communicated with described coal dust device.
Preferably, the outlet of described flue gas condenser is also connected with carbon dioxide collection equipment, and the porch of this carbon dioxide collection equipment is provided with second and cut-offs valve.
Preferably, the porch of described flue gas condenser is provided with second and cut-offs valve.
Preferably, described bypass is provided with second and cut-offs valve.
Preferably, described flue gas processing device comprises the deduster, air-introduced machine, described flue gas heat-exchange unit and the desulfurizer that connect successively, wherein, described deduster is communicated with described coal-powder boiler, and described desulfurizer is communicated with described flue gas condenser with one end of described bypass respectively.
Preferably, described blower fan comprises primary air fan and overfire air fan, described note oxygen device comprises the first oxygen filling container and the second oxygen filling container, wherein, described primary air fan is communicated with described coal dust device with described flue gas heat-exchange unit respectively, and described first oxygen filling container is connected between described primary air fan and described coal dust device; Described overfire air fan is communicated with described coal-powder boiler with described flue gas heat-exchange unit respectively, and described second oxygen filling container is connected between described overfire air fan and described coal-powder boiler.
Other features and advantages of the utility model are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for description, is used from explanation the utility model, but does not form restriction of the present utility model with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the structural representation of the air and gas system that the utility model detailed description of the invention provides.
Description of reference numerals
1-coal-powder boiler, 2-blower fan, 3-air-suction duct, 4-coal dust device, 5-flue gas processing device, 6-flue gas heat-exchange unit, 7-flue gas condenser, 8-bypass, 9-notes oxygen device, 10-air door valve, and 11-first cut-offs valve, 12-silencing means, 13-control valve, 14-carbon dioxide collection equipment, 15-second cut-offs valve, 16-deduster, 17-air-introduced machine, 18-desulfurizer, 21-primary air fan, 22-overfire air fan, 91-first oxygen filling container, 92-second oxygen filling container, 19-chimney.
Detailed description of the invention
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the utility model, is not limited to the utility model.
As shown in Figure 1, described air and gas system comprises coal-powder boiler 1, coal dust device 4, flue gas processing device 5, flue gas condenser 7, bypass 8 and note oxygen device 9, wherein,
Coal-powder boiler 1 is connected with blower fan 2, and described blower fan 2 is connected with air-suction duct 3; Coal dust device 4 is communicated with described coal-powder boiler 1 with described blower fan 2 respectively; Flue gas processing device 5 is communicated with described coal-powder boiler 1, and this flue gas processing device 5 has flue gas heat-exchange unit 6; The entrance of flue gas condenser 7 is communicated with described flue gas processing device 5, and the outlet of described flue gas condenser 7 is communicated with described flue gas heat-exchange unit 6; One end of bypass 8 is connected between described flue gas condenser 7 and described flue gas processing device 5, and the other end of bypass 8 is connected to described flue gas heat-exchange unit 6, and described flue gas heat-exchange unit 6 is communicated with described blower fan 2; Note oxygen device 9 is communicated with described coal dust device 4 with described coal-powder boiler 1 respectively.
Like this, when this air and gas system needs oxygen enrichment dry circulating combustion, close the air-suction duct that blower fan connects, open the communicating passage of blower fan and flue gas heat-exchange unit, close bypass, and open the entrance of flue gas condenser, open note oxygen device, thus by flue gas after dedusting, desulfurization and condensation dehydration, be recycled in coal-powder boiler and/or coal dust device after partial fume note oxygen, all the other flue gases then carry out smoke carbon dioxide capture or discharge as required; When this air and gas system needs air burning, open the air-suction duct that blower fan connects, close the communicating passage of blower fan and flue gas heat-exchange unit, open bypass, and close the entrance of flue gas condenser, close note oxygen device, thus make blower fan by air-suction duct air draught on the spot, for coal-powder boiler and/or coal dust device provide air, flue gas discharges after (selectively) through dedusting, desulfurization, heating.This air and gas system can select the dry circulating combustion of oxygen enrichment or air burning according to the actual requirements, and effectively reduce the discharge capacity of carbon dioxide and reduce the processing cost of carbon dioxide, and this air and gas system floor space is few, operating flexibility is high.
Air-suction duct 3 is preferably air-suction duct on the spot.
Preferably, in order to realize the convenience of the dry circulating combustion of oxygen enrichment and air burning handover operation, the pipeline (recirculating gas duct) between described blower fan 2 and described flue gas heat-exchange unit 6 is connected with air door valve 10.More preferably, air door valve 10 comprises air door and pitch, and like this, two kinds of combustion systems switch only needs simple operations air door, adjustment fan operation parameter.Preferably, blower fan 2 adopts centrifugation frequency to drive the blower fan of type.
Further, for the ease of operation during air burning, the air-suction duct 3 of described blower fan 2 is connected with first and cut-offs valve 11 and silencing means 12.This first cut-offs valve 11 and preferably adopts air door and pitch, namely, adopts and same with air door valve 10 cut-offs control device,
Further, when the dry circulating combustion of oxygen enrichment, be convenient to control note oxygen amount according to actual motion demand, preferably, in the pipeline that described note oxygen device 9 and described coal-powder boiler 1 are communicated with described coal dust device 4, be provided with control valve 13.Like this, by this control valve 13, can control well to note oxygen amount.
Certainly, in order to when the dry circulating combustion of oxygen enrichment, improve the recovery utilization rate of carbon dioxide, preferably, as shown in Figure 1, the outlet of flue gas condenser 7 is also connected with carbon dioxide collection equipment 14, the porch of this carbon dioxide collection equipment 14 is provided with second and cut-offs valve 15, and like this, flue gas is after dedusting, desulfurization and condensation dehydration, be recycled in coal-powder boiler and/or coal dust device after partial fume note oxygen, all the other flue gases then carry out smoke carbon dioxide capture or discharge as required.
In addition, in order to when the dry circulating combustion of oxygen enrichment and air burning switch, convenient operation flue gas condenser 7, preferably, the porch of described flue gas condenser 7 is provided with second and cut-offs valve 15.
In like manner, in order to when the dry circulating combustion of oxygen enrichment and air burning switch, cut-offfing of convenient operation bypass, preferably, described bypass 8 is provided with second and cut-offs valve 15.
In a kind of collocation form of flue gas processing device 5, as shown in Figure 1, described flue gas processing device 5 comprises the deduster 16, air-introduced machine 17, described flue gas heat-exchange unit 6 and the desulfurizer 18 that connect successively, wherein, described deduster 16 is communicated with described coal-powder boiler 1, and described desulfurizer 18 is communicated with described flue gas condenser 7 with one end of described bypass 8 respectively.
Namely, the outlet of coal-powder boiler is in the entrance of deduster, the outlet of deduster is in the entrance of air-introduced machine, the outlet of air-introduced machine is in the first entrance of flue gas heat-exchange unit 6, first outlet of flue gas heat-exchange unit is in the entrance of desulfurizer 18, and the outlet of desulfurizer 18 is in the entrance of bypass and flue gas condenser.Now, the pipeline that the outlet of flue gas condenser 7 is communicated with between described flue gas heat-exchange unit 6 can be connected to the second porch of flue gas heat-exchange unit 6 together with the described other end of bypass 8, selectively, the described other end of bypass 8 is connected to the outlet of flue gas condenser 7 with on the pipeline be communicated with between described flue gas heat-exchange unit 6 second entrance.Second outlet of flue gas heat-exchange unit 6 is then communicated with blower fan 2 by above-described recirculating gas duct.
Certainly, the second outlet of flue gas heat-exchange unit 6 also can be connected with chimney 19, is convenient to discharge unnecessary treated flue gas.
Further, in a preferred embodiment, described blower fan 2 comprises primary air fan 21 and overfire air fan 22, described note oxygen device 9 comprises the first oxygen filling container 91 and the second oxygen filling container 92, wherein, described primary air fan 21 is communicated with described coal dust device 4 with described flue gas heat-exchange unit 6 respectively, and described first oxygen filling container 91 is connected between described primary air fan 21 and described coal dust device 4; Described overfire air fan 22 is communicated with described coal-powder boiler 1 with described flue gas heat-exchange unit 6 respectively, and described second oxygen filling container 92 is connected between described overfire air fan 22 and described coal-powder boiler 1.Like this, according to the demand of the dry circulating combustion of oxygen enrichment and air burning, can respectively or simultaneously to coal dust device 4 and coal-powder boiler 1 note oxygen or provide air.
Below preferred embodiment of the present utility model is described by reference to the accompanying drawings in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
In addition, also can be combined between various different embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (9)
1. an air and gas system, this air and gas system comprises:
Coal-powder boiler (1), this coal-powder boiler (1) is connected with blower fan (2), and described blower fan (2) is connected with air-suction duct (3);
Coal dust device (4), this coal dust device (4) is communicated with described coal-powder boiler (1) with described blower fan (2) respectively;
Flue gas processing device (5), this flue gas processing device (5) is communicated with described coal-powder boiler (1), and has flue gas heat-exchange unit (6);
It is characterized in that, described air and gas system also comprises,
Flue gas condenser (7), the entrance of this flue gas condenser (7) is communicated with described flue gas processing device (5), and the outlet of described flue gas condenser (7) is communicated with described flue gas heat-exchange unit (6);
Bypass (8), one end of this bypass (8) is connected between described flue gas condenser (7) and described flue gas processing device (5), the other end is connected to described flue gas heat-exchange unit (6), and described flue gas heat-exchange unit (6) is communicated with described blower fan (2);
Note oxygen device (9), this note oxygen device (9) is communicated with described coal dust device (4) with described coal-powder boiler (1) respectively.
2. air and gas system according to claim 1, is characterized in that, the pipeline between described blower fan (2) and described flue gas heat-exchange unit (6) is connected with air door valve (10).
3. air and gas system according to claim 1, is characterized in that, the air-suction duct (3) of described blower fan (2) is connected with first and cut-offs valve (11) and silencing means (12).
4. air and gas system according to claim 1, is characterized in that, is provided with control valve (13) in the pipeline that described note oxygen device (9) and described coal-powder boiler (1) are communicated with described coal dust device (4).
5. air and gas system according to claim 1, it is characterized in that, the outlet of described flue gas condenser (7) is also connected with carbon dioxide collection equipment (14), and the porch of this carbon dioxide collection equipment (14) is provided with second and cut-offs valve (15).
6. air and gas system according to claim 1, is characterized in that, the porch of described flue gas condenser (7) is provided with second and cut-offs valve (15).
7. air and gas system according to claim 1, is characterized in that, described bypass (8) is provided with second and cut-offs valve (15).
8. air and gas system according to claim 1, it is characterized in that, described flue gas processing device (5) comprises the deduster (16), air-introduced machine (17), described flue gas heat-exchange unit (6) and the desulfurizer (18) that connect successively, wherein, described deduster (16) is communicated with described coal-powder boiler (1), and described desulfurizer (18) is communicated with described flue gas condenser (7) with one end of described bypass (8) respectively.
9. according to the air and gas system in claim 1-8 described in any one, it is characterized in that, described blower fan (2) comprises primary air fan (21) and overfire air fan (22), described note oxygen device (9) comprises the first oxygen filling container (91) and the second oxygen filling container (92), wherein
Described primary air fan (21) is communicated with described coal dust device (4) with described flue gas heat-exchange unit (6) respectively, and described first oxygen filling container (91) is connected between described primary air fan (21) and described coal dust device (4);
Described overfire air fan (22) is communicated with described coal-powder boiler (1) with described flue gas heat-exchange unit (6) respectively, and described second oxygen filling container (92) is connected between described overfire air fan (22) and described coal-powder boiler (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420634509.7U CN204313267U (en) | 2014-10-29 | 2014-10-29 | Air and gas system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420634509.7U CN204313267U (en) | 2014-10-29 | 2014-10-29 | Air and gas system |
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| CN204313267U true CN204313267U (en) | 2015-05-06 |
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| CN201420634509.7U Active CN204313267U (en) | 2014-10-29 | 2014-10-29 | Air and gas system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135471A (en) * | 2015-08-14 | 2015-12-09 | 中国神华能源股份有限公司 | Switching control device and method for operation mode of oxygen-enriched combustion system |
| CN105157020A (en) * | 2015-09-25 | 2015-12-16 | 中国神华能源股份有限公司 | Oxygen-enriched combustion system and method |
| CN105605562A (en) * | 2015-12-25 | 2016-05-25 | 中国神华能源股份有限公司 | Smoke gas circulation system of oxygen-enriched combustion boiler |
| CN109737763A (en) * | 2018-12-21 | 2019-05-10 | 首钢京唐钢铁联合有限责任公司 | Improve sleeve kiln flue gas CO2Method of concentration |
-
2014
- 2014-10-29 CN CN201420634509.7U patent/CN204313267U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135471A (en) * | 2015-08-14 | 2015-12-09 | 中国神华能源股份有限公司 | Switching control device and method for operation mode of oxygen-enriched combustion system |
| CN105157020A (en) * | 2015-09-25 | 2015-12-16 | 中国神华能源股份有限公司 | Oxygen-enriched combustion system and method |
| CN105157020B (en) * | 2015-09-25 | 2018-04-10 | 中国神华能源股份有限公司 | oxygen-enriched combustion system and method |
| CN105605562A (en) * | 2015-12-25 | 2016-05-25 | 中国神华能源股份有限公司 | Smoke gas circulation system of oxygen-enriched combustion boiler |
| CN109737763A (en) * | 2018-12-21 | 2019-05-10 | 首钢京唐钢铁联合有限责任公司 | Improve sleeve kiln flue gas CO2Method of concentration |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CU01 | Correction of utility model patent |
Correction item: Patentee Correct: China Power Engineering Consulting Group Southwest Electric Power Design Institute Co., Ltd. False: Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation Number: 18 Page: The title page Volume: 31 |
|
| CU03 | Correction of utility model patent gazette |
Correction item: Patentee Correct: China Power Engineering Consulting Group Southwest Electric Power Design Institute Co., Ltd. False: Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation Number: 18 Volume: 31 |
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| ERR | Gazette correction | ||
| RECT | Rectification |