CN108636611B - Electric dust removal vibration control system and control method - Google Patents
Electric dust removal vibration control system and control method Download PDFInfo
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- CN108636611B CN108636611B CN201810453921.1A CN201810453921A CN108636611B CN 108636611 B CN108636611 B CN 108636611B CN 201810453921 A CN201810453921 A CN 201810453921A CN 108636611 B CN108636611 B CN 108636611B
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- 239000000428 dust Substances 0.000 title claims abstract description 97
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000005684 electric field Effects 0.000 claims abstract description 68
- 238000010276 construction Methods 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 claims 1
- 238000001556 precipitation Methods 0.000 claims 1
- 230000001360 synchronised effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/76—Cleaning the electrodes by using a mechanical vibrator, e.g. rapping gear ; by using impact
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Abstract
The invention provides an electric dust removal rapping control system and a control method, wherein each rapping device of the electric dust removal rapping control system is in reciprocating circulation by taking a single rapping sequence as a base number, and each rapping device is sequentially and individually rapped according to a preset strategy in the single rapping sequence, and the rapping devices are rapped for a preset time period once; the predetermined strategy is that, within a single rapping sequence, there is at least one dust collector chamber between the currently activated rapper and the rapper activated in the time period adjacent thereto. The electric dust removal rapping control system and the control method realize the sequential rapping of the rappers by setting the running time and the waiting time of each rapper, avoid the problem that the next and last electric fields and the outlet trough plate in the same electric dust removal chamber are rapped simultaneously, and solve the problem of secondary dust raising caused by the synchronous rapping of the last two stages of dust removers or the trough plates.
Description
Technical Field
The invention relates to the technical field of dust removal of a thermal power plant, in particular to an electric dust removal rapping control system and method for the thermal power plant.
Background
The dust removal of a thermal power plant is one of necessary process steps, and after the necessary dust removal is carried out through electric dust removal, the dust can be reduced to be within a controllable range through the whole length; however, because the rapper in the electric field needs to start vibration according to a preset program, the usually set program is that the rappers in the electric field start rapping in turn, so that the latter two electric fields, i.e. the four-electric field anode rapper and the five-electric field anode rapper and the trough plate rapper, become the main cause of secondary dust raising.
Disclosure of Invention
The invention aims to provide an electric dust collecting and rapping control system and a control method for a thermal power plant, so as to solve at least one technical problem.
In order to solve the technical problem, the invention provides an electric dust removal rapping control system, which comprises an outlet trough plate, a penult electric field and a final electric field, wherein at least four rappers are arranged in the outlet trough plate, at least four rappers are arranged in the penult electric field, and at least four rappers are arranged in the final electric field;
each vibrator is in reciprocating circulation by taking a single vibration sequence as a base number, and each vibrator is sequentially and independently vibrated for a single time according to a preset strategy in the single vibration sequence, and the vibrators are vibrated for a preset time period for a single time;
the preset strategy is that at least one dust chamber is arranged between the currently started rapper and the rapper started in the time period adjacent to the currently started rapper in a single rapping sequence.
Furthermore, the rappers arranged in the penultimate electric field comprise an A-side penultimate left-chamber rapper, an A-side penultimate right-chamber rapper, a B-side penultimate left-chamber rapper and a B-side penultimate right-chamber rapper;
the rappers arranged in the final-stage electric field comprise an A-side final-stage left-chamber rapper, an A-side final-stage right-chamber rapper, a B-side final-stage left-chamber rapper and a B-side final-stage right-chamber rapper;
the rappers arranged in the outlet trough plate comprise an A-side outlet left chamber trough plate rapper, an A-side outlet right chamber trough plate rapper, a B-side outlet left chamber trough plate rapper and a B-side outlet right chamber trough plate rapper.
Further, the operation time period is 150 seconds, and the waiting time period is 70 seconds to 110 seconds.
Further, the preset strategy is to start the corresponding rappers in turn according to the following sequence, and keep on, wait for the preset time period:
starting the A side penultimate left chamber vibrator, keeping the A side penultimate left chamber vibrator on for 150 seconds, stopping vibration, and waiting for 90 seconds for dust fall;
starting the B-side final-stage left chamber vibrator, stopping vibration after keeping the starting for 150 seconds, and waiting for 90 seconds for dust fall;
starting the A-side cell plate right chamber vibrator, keeping the A-side cell plate right chamber vibrator on for 150 seconds, stopping vibrating, and waiting for 90 seconds for dust fall;
starting the B-side penultimate right-chamber vibrator, keeping the vibrator on for 150 seconds, stopping vibrating, and waiting for 90 seconds for dust fall;
starting the A side final-stage right chamber vibrator, keeping the A side final-stage right chamber vibrator on for 150 seconds, stopping vibration, and waiting for 90 seconds for dust fall;
starting the B-side slotted plate left chamber vibrator, keeping the vibrator on the B-side slotted plate for 150 seconds, stopping vibration, and waiting for 90 seconds for dust fall;
starting the A-side penultimate right chamber vibrator, stopping vibration after keeping the A-side penultimate right chamber vibrator started for 150 seconds, and waiting for 90 seconds for dust fall;
starting the B-side final-stage right chamber vibrator, stopping vibration after keeping the starting for 150 seconds, and waiting for 90 seconds for dust fall;
starting the A-side slotted plate left chamber vibrator, keeping the A-side slotted plate left chamber vibrator on for 150 seconds, stopping vibrating, and waiting for 90 seconds for dust fall;
starting the B-side penultimate left-chamber vibrator, stopping vibration after keeping the starting for 150 seconds, and waiting for 90 seconds for dust fall;
starting the A-side final-stage left chamber vibrator, stopping vibration after keeping the A-side final-stage left chamber vibrator started for 150 seconds, and waiting for 90 seconds for dust fall;
and starting the B-side trough plate right chamber rapping device, keeping the starting for 150 seconds, stopping vibrating, and waiting for 90 seconds for dust fall.
The invention also provides an electric dust removal rapping control method, which is characterized in that each rapping device is controlled to reciprocate by taking a single rapping sequence as a base number, and each rapping device is controlled to sequentially and individually rap at a single time within a preset time period according to a preset strategy in the single rapping sequence;
in a single rapping sequence, judging whether the rapping device to be started currently is adjacent to the rapping device started in the time period adjacent to the rapping device, if so, stopping starting the rapping device, and if not, starting the rapping device.
The electric dust removal rapping control system and the control method provided by the invention realize the sequential rapping of the rappers by setting the running time and the waiting time of each rapper, thereby avoiding the problem that the rapping of a penultimate electric field, a secondary electric field and an inlet and outlet trough plate is carried out simultaneously and avoiding the problem of secondary dust raising caused by synchronous rapping; meanwhile, by setting and controlling the rapping sequence, the condition that adjacent rapping is carried out on the same side or the same type of rapper is ingeniously avoided, the condition of secondary dust raising is more effectively avoided, and the dust removal effect and the dust removal capacity are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a specific embodiment of the electric dust-removal rapping control method provided by the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a specific embodiment, the electric dust collecting rapping control system provided by the invention is applied to electric dust collecting equipment of a thermal power plant, taking the electric dust collecting equipment with a five-stage electric field as an example, the equipment sequentially comprises a first electric field, a second electric field, a third electric field, a fourth electric field and a fifth electric field, obviously, the fourth electric field is a penultimate electric field, and the fifth electric field is a final electric field. The electric dust removal rapping control system comprises an outlet slotted plate, a penultimate electric field and a final electric field, wherein at least four rappers are arranged in the outlet slotted plate, at least four rappers are arranged in the penultimate electric field, and at least four rappers are arranged in the final electric field; the specific specification and model of each vibrator can be the same or can be distinguished according to the working condition.
Each vibrator is in reciprocating circulation by taking a single vibration sequence as a base number, and each vibrator is sequentially and independently vibrated for a single time according to a preset strategy in the single vibration sequence, and the vibrators are vibrated for a preset time period for the single time; the predetermined strategy is such that, in a single rapping sequence, there is at least one dust chamber between the currently activated rapper and the rapper activated in the period of time adjacent thereto. That is, in the working process, each vibrator is started at intervals, one or more vibrators can be arranged between two vibrators which are started in sequence, namely, two vibrators which are started in adjacent time periods are two vibrators which are not adjacent in physical position, and the condition that one or more other vibrators are not adjacent at the moment can be the condition that one or more other vibrators are spaced is adopted, so that secondary dust raising caused by the sequential starting of the two adjacent vibrators is avoided; after each single rapping sequence is over, the cycle is restarted and indefinitely repeated until the device is shut down to ensure that the device is operating properly.
Specifically, as exemplified in the case of the above-mentioned five-stage electric field, the rappers set in the penultimate electric field include an A-side penultimate left-chamber rapper, an A-side penultimate right-chamber rapper, a B-side penultimate left-chamber rapper and a B-side penultimate right-chamber rapper; the rappers arranged in the final-stage electric field comprise an A-side final-stage left-chamber rapper, an A-side final-stage right-chamber rapper, a B-side final-stage left-chamber rapper and a B-side final-stage right-chamber rapper; the rappers arranged in the outlet slot plate comprise an A-side outlet left chamber slot plate rapper, an A-side outlet right chamber slot plate rapper, a B-side outlet left chamber slot plate rapper and a B-side outlet right chamber slot plate rapper; in this embodiment, the penultimate electric field is the fourth electric field and the final electric field is the fifth electric field.
In theory, the number of rappers is not limited to the above form, for example, the number of outlet left chamber trough plate rappers can be four or more, the number of outlet right chamber trough plate rappers can be four or more, and the number of rappers at other positions can also be four or more, and for convenience of description, the above number of rappers are taken as an example.
In this embodiment the predetermined period of time is 150 seconds, preferably the on-time interval is selected to be 150 seconds plus 90 seconds in two rappers that are on in adjacent time periods.
Specifically, the preset strategy is to start the corresponding rappers in sequence in the following order and keep on for a preset time period:
starting the A side penultimate left chamber vibrator, stopping vibration after keeping the A side penultimate left chamber vibrator started for 150 seconds, and waiting for 90 seconds for dust fall;
starting the B-side final-stage left chamber vibrator, stopping vibration after keeping the starting for 150 seconds, and waiting for 90 seconds for dust fall;
starting the A-side slot plate right chamber vibrator, keeping the vibrator on the A-side slot plate for 150 seconds, stopping vibration, and waiting for 90 seconds for dust fall;
starting the B-side penultimate right chamber vibrator, stopping vibration after keeping the starting for 150 seconds, and waiting for 90 seconds for dust fall;
starting the A-side final-stage right chamber vibrator, stopping vibration after keeping the A-side final-stage right chamber vibrator started for 150 seconds, and waiting for 90 seconds for dust fall;
starting the B-side slotted plate left chamber vibrator, keeping the vibrator on the B-side slotted plate for 150 seconds, stopping vibration, and waiting for 90 seconds for dust fall;
starting the A-side penultimate right chamber vibrator, stopping vibration after keeping the A-side penultimate right chamber vibrator started for 150 seconds, and waiting for 90 seconds for dust fall;
starting the B-side final-stage right chamber vibrator, keeping the starting for 150 seconds, stopping vibrating, and waiting for 90 seconds for dust fall;
starting the A-side slot plate left chamber vibrator, keeping the vibrator on the A-side slot plate for 150 seconds, stopping vibration, and waiting for 90 seconds for dust fall;
starting the B-side penultimate left-chamber vibrator, stopping vibration after keeping the starting for 150 seconds, and waiting for 90 seconds for dust fall;
starting the A side final-stage left chamber vibrator, keeping the A side final-stage left chamber vibrator on for 150 seconds, stopping vibration, and waiting for 90 seconds for dust fall;
and starting the B-side trough plate right chamber rapping device, keeping the starting for 150 seconds, stopping vibrating, and waiting for 90 seconds for dust fall.
Thus, the rappers are started in sequence in the sequence of A side left chamber four electric field rapper → B side left chamber five electric field rapper → A side right chamber trough plate rapper → B right chamber four electric field rapper → A side right five electric field chamber rapper → B side left chamber trough plate rapper → A side right chamber four electric field rapper → B side right chamber five electric field rapper → A side left chamber trough plate rapper → B left chamber four electric field rapper → A side left five electric field chamber rapper → B side right chamber trough plate rapper → so that the rappers are skillfully avoided from adjacent rapping on the same side or the same type rapper and the secondary dust raising is more effectively avoided.
In the specific construction process, the original logic is kept unchanged, the sequential control logic of 12 rapping motors is formed by newly adding four electric fields, five electric fields, eight anodes and four trough plates to an electric dust removal system, when the sequential control is put into operation, the 12 rapping motors sequentially operate in sequence (the 12 rapping motors are locked mutually), the operation of the rapping motors in the first electric field, the second electric field and the third electric field is not influenced in the period, and when the sequential control function of the four electric fields and the five electric fields is cancelled, operators can put into the operation of the rapping motors according to a periodic mode. The sequential control function needs to meet the requirements that the operation time of a rapping motor can be manually set, the waiting time is set after each rapping operation, the rapping motor sequentially operates according to the sequence of four electric fields and five electric fields without special sequence requirements, the sequential control logic has a step skipping function, and the sequential control can be automatically started again after the shutdown time is set after the whole sequential control cycle is finished and the shutdown time is reached.
In addition to the control system, the invention also provides an electric dust removal rapping control method based on the control system, which is characterized in that each rapping device is controlled to reciprocate by taking a single rapping sequence as a base number, and each rapping device is controlled to sequentially and individually rap at a single time within a preset time period according to a preset strategy in the single rapping sequence; in a single rapping sequence, judging whether the rapping device to be started currently is adjacent to the rapping device started in the time period adjacent to the rapping device, if so, stopping starting the rapping device, and if not, starting the rapping device.
Further, as shown in fig. 1, the method comprises the steps of:
s1: starting the A side penultimate left chamber vibrator, stopping vibration after keeping the A side penultimate left chamber vibrator started for 150 seconds, waiting for 90 seconds for dust fall, and entering S2;
s2: starting the last-stage left chamber vibrator on the side B, stopping vibrating after keeping the last-stage left chamber vibrator on for 150 seconds, waiting for 90 seconds for dust fall, and entering S3;
s3: starting the A-side cell plate right chamber vibrator, keeping the vibrator on the A-side cell plate right chamber vibrator for 150 seconds, stopping vibration, waiting for 90 seconds for dust fall, and entering S4;
s4: starting the B side penultimate right chamber vibrator, stopping vibration after keeping the B side penultimate right chamber vibrator started for 150 seconds, waiting for 90 seconds for dust fall, and entering S5;
s5: starting the final-stage right chamber vibrator at the side A, stopping vibrating after keeping the final-stage right chamber vibrator on for 150 seconds, waiting for 90 seconds for dust fall, and entering S6;
s6: starting the B-side slotted plate left chamber vibrator, keeping the vibrator on the B-side slotted plate for 150 seconds, stopping vibration, waiting for 90 seconds for dust fall, and entering S7;
s7: starting the A side penultimate right chamber vibrator, stopping vibration after keeping the A side penultimate right chamber vibrator started for 150 seconds, waiting for 90 seconds for dust fall, and entering S8;
s8: starting the final-stage right chamber vibrator at the side B, stopping vibrating after keeping the final-stage right chamber vibrator on for 150 seconds, waiting for 90 seconds for dust fall, and entering S9;
s9: starting the A side slot plate left chamber vibrator, keeping the vibrator on the A side for 150 seconds, stopping vibration, waiting for 90 seconds for dust fall, and entering S10;
s10: starting a B-side penultimate left-chamber vibrator, keeping the vibrator on for 150 seconds, stopping vibration, waiting for 90 seconds to fall dust, and entering S11;
s11: starting the last-stage left chamber vibrator at the side A, stopping vibrating after keeping the last-stage left chamber vibrator on for 150 seconds, waiting for 90 seconds for dust fall, and entering S12;
s12: and starting the B-side trough plate right chamber vibrator, keeping the vibrator on for 150 seconds, stopping vibrating, waiting for 90 seconds for dust fall, and entering S1 again.
The electric dust removal rapping control system and the control method provided by the invention realize the sequential rapping of the rappers by setting the running time and the waiting time of each rapper, thereby avoiding the problem that the rapping of a penultimate electric field, a secondary electric field and an outlet slotted plate is carried out simultaneously and avoiding the problem of secondary dust raising caused by synchronous rapping; meanwhile, by setting and controlling the rapping sequence, the condition that adjacent rapping is carried out on the same side or the same type of rapper is ingeniously avoided, the condition of secondary dust raising is more effectively avoided, and the dust removal effect and the dust removal capacity are improved.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (5)
1. An electric precipitation rapping control system is characterized in that:
the device comprises a penult-level electric field, a final-level electric field and an outlet trough plate, wherein four vibrators are arranged in the penult-level electric field, four vibrators are arranged in the final-level electric field, and four vibrators are arranged in the outlet trough plate;
each vibrator is in reciprocating circulation by taking a single vibration sequence as a base number, and each vibrator is sequentially and independently vibrated for a single time according to a preset strategy in the single vibration sequence, and the vibrators are vibrated for a preset time period for a single time;
the electric dust collecting rapping control system further comprises three existing electric fields, the penultimate electric field, the final electric field and the outlet trough plate are newly added electric dust collecting rapping mechanisms, in the construction process, motors in rappers in the penultimate electric field, the final electric field and the outlet trough plate sequentially run, and the motors in the rappers in the penultimate electric field, the final electric field and the outlet trough plate are locked mutually; in the construction process, the operation of the motor in the vibrator of the existing three electric fields is not influenced, and when the sequential control function of the penultimate electric field and the final electric field is cancelled, operators can put the vibrator into operation according to a periodic mode;
the predetermined strategy is that, within a single rapping sequence, there is at least one dust collector chamber between the currently activated rapper and the rapper activated in the time period adjacent thereto.
2. The electric dust removal rapping control system of claim 1, wherein:
the rappers arranged in the penultimate electric field comprise an A-side penultimate left-chamber rapper, an A-side penultimate right-chamber rapper, a B-side penultimate left-chamber rapper and a B-side penultimate right-chamber rapper;
the rappers arranged in the final-stage electric field comprise an A-side final-stage left-chamber rapper, an A-side final-stage right-chamber rapper, a B-side final-stage left-chamber rapper and a B-side final-stage right-chamber rapper;
the rappers arranged in the outlet trough plate comprise an A-side outlet left chamber trough plate rapper, an A-side outlet right chamber trough plate rapper, a B-side outlet left chamber trough plate rapper and a B-side outlet right chamber trough plate rapper.
3. An electric dust removal rapping control system in accordance with claim 2, wherein the run time period is 150 seconds and the wait time period is in the range of 70 seconds to 110 seconds.
4. The electric dust removal rapping control system of claim 3, wherein the preset strategy is that the corresponding rappers are started in turn in the following order and are kept on, waiting for the preset time period, and 12 rappers are cycled once in one cycle:
starting the A side penultimate left chamber vibrator, keeping the A side penultimate left chamber vibrator on for 150 seconds, stopping vibration, and waiting for 90 seconds for dust fall;
starting the B-side final-stage left chamber vibrator, stopping vibration after keeping the starting for 150 seconds, and waiting for 90 seconds for dust fall;
starting the A side outlet right chamber slot plate vibrator, keeping the vibrator on the A side outlet for 150 seconds, stopping vibration, and waiting for 90 seconds for dust fall;
starting the B-side penultimate right chamber vibrator, stopping vibration after keeping the starting for 150 seconds, and waiting for 90 seconds for dust fall;
starting the A-side final-stage right chamber vibrator, stopping vibration after keeping the A-side final-stage right chamber vibrator started for 150 seconds, and waiting for 90 seconds for dust fall;
starting the B side outlet left chamber slot plate vibrator, keeping the vibrator on the B side outlet for 150 seconds, stopping vibrating, and waiting for 90 seconds for dust fall;
starting the A-side penultimate right chamber vibrator, stopping vibration after keeping the A-side penultimate right chamber vibrator started for 150 seconds, and waiting for 90 seconds for dust fall;
starting the B-side final-stage right chamber vibrator, keeping the starting for 150 seconds, stopping vibrating, and waiting for 90 seconds for dust fall;
starting the A side outlet left chamber slot plate vibrator, keeping the vibrator on the A side outlet for 150 seconds, stopping vibrating, and waiting for 90 seconds for dust fall;
starting the B side penultimate left chamber vibrator, keeping the starting for 150 seconds, stopping vibrating, and waiting for 90 seconds for dust fall;
starting the A-side final-stage left chamber vibrator, stopping vibration after keeping the A-side final-stage left chamber vibrator started for 150 seconds, and waiting for 90 seconds for dust fall;
and starting the B-side outlet right chamber slot plate vibrator, keeping the vibrator on for 150 seconds, stopping vibrating, and waiting for 90 seconds for dust fall.
5. An electric dust removal rapping control method applied to an electric dust removal rapping control system, which is characterized in that the electric dust removal rapping control system is the electric dust removal rapping control system as claimed in any one of claims 1-4, and the control method comprises the following steps: controlling each vibrator to perform reciprocating circulation by taking a single vibration sequence as a base number, and controlling each vibrator to perform independent vibration in sequence and in a single vibration sequence according to a preset strategy within a preset time period;
in a single rapping sequence, the service rapper can be removed from the rapping sequence by a manual skip function, without affecting the program operation.
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| CN113019705B (en) * | 2021-03-09 | 2023-06-27 | 浙江菲达环保科技股份有限公司 | Final electric field vibration control and system of electric dust removal system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997041958A1 (en) * | 1996-05-09 | 1997-11-13 | ABB Fläkt Aktiebolag | Method for controlling an electrostatic precipitator |
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| JP3527690B2 (en) * | 2000-07-04 | 2004-05-17 | 住友重機械工業株式会社 | Electric dust collector |
| CN202410839U (en) * | 2012-01-30 | 2012-09-05 | 中国电力投资集团公司 | Electrostatic dust collector |
| CN102553721B (en) * | 2012-01-30 | 2015-08-05 | 中国电力投资集团公司 | Electrostatic precipitator and step by step vibration dust-cleaning method |
| CN103769298A (en) * | 2012-10-18 | 2014-05-07 | 金东纸业（江苏）股份有限公司 | Electrostatic precipitation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO1997041958A1 (en) * | 1996-05-09 | 1997-11-13 | ABB Fläkt Aktiebolag | Method for controlling an electrostatic precipitator |
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Address after: 464100 Pingqiao Town, Pingqiao District, Xinyang, Henan Applicant after: Shaanxi Coal Power Xinyang Co.,Ltd. Address before: 464100 Pingqiao Town, Pingqiao District, Xinyang, Henan Applicant before: DATANG XINYANG ELECTRIC POWER GENERATION Co.,Ltd. |
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