CN219034829U - Combined operation system of gas boiler generator set and sintering waste heat generator set - Google Patents
Combined operation system of gas boiler generator set and sintering waste heat generator set Download PDFInfo
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- CN219034829U CN219034829U CN202223490212.1U CN202223490212U CN219034829U CN 219034829 U CN219034829 U CN 219034829U CN 202223490212 U CN202223490212 U CN 202223490212U CN 219034829 U CN219034829 U CN 219034829U
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- 239000007789 gas Substances 0.000 title claims abstract description 65
- 239000002918 waste heat Substances 0.000 title claims abstract description 50
- 238000005245 sintering Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 68
- 230000009467 reduction Effects 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 10
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 239000003034 coal gas Substances 0.000 claims 1
- 239000000428 dust Substances 0.000 description 15
- 238000010248 power generation Methods 0.000 description 7
- 230000005484 gravity Effects 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The utility model discloses a combined operation system of a gas boiler generator set and a sintering waste heat generator set, which comprises the gas boiler generator set, wherein the gas boiler generator set is provided with a first steam pipeline, a first steam turbine and a first generator which are output from the top of a gas boiler, the first steam pipeline is provided with a first-stage temperature and pressure reducing device, the first steam pipeline is divided into two paths of output, a first automatic stop valve is arranged on one path and connected to the first steam turbine, and a second automatic stop valve, a second-stage temperature and pressure reducing device and a third automatic stop valve are arranged on the other path; the sintering waste heat generator set is provided with a second steam pipeline, a second steam turbine and a second generator which are output from the top of the waste heat boiler, and a fourth automatic stop valve is arranged on the second steam pipeline. Thus, when the waste heat boiler generates no steam or insufficient steam, the steam of the gas boiler can be supplemented, and when the first turbine and the first generator do not work normally, the steam of the gas boiler can be utilized.
Description
Technical Field
The utility model relates to the technical field of waste heat power generation in steel plants, in particular to a combined operation system of a gas boiler generator set and a sintering waste heat generator set.
Background
It is common to recover and generate power by using waste heat such as blast furnace gas, converter gas, sintering machine, ring cooler, converter, steel rolling heating furnace, etc., wherein the gas power generation generally adopts medium and high voltage parameter generator sets, and the sintering machine generally adopts low voltage parameter generator sets. In actual operation, the gas source is relatively stable, so that the gas generator set operates relatively stably. The waste heat generator set is affected by the upstream production process characteristics, so that the waste heat output is unstable, the operation of the waste heat generator set is unstable, and the frequent shutdown result is caused. Each start-up and shut-down necessarily causes steam emission loss and waste heat and electric energy consumption loss, and causes adverse effects on the safety and service life of the unit. Meanwhile, the startup and shutdown of the generator set at each time tend to impact the internal power grid of the metallurgical enterprise, and other production sections may be stopped due to power supply problems.
In CN 202954856U, a system for improving the operation efficiency of waste heat power generation is disclosed, which comprises a sintering waste heat power generation device, wherein a waste heat boiler superheater outlet at the top of a waste heat boiler is connected with a low-temperature low-pressure turbine main valve through a low-temperature low-pressure main steam pipeline, the output of the low-temperature low-pressure turbine is connected with a first generator, a steam outlet of the low-temperature low-pressure turbine is connected with a first condenser, the first condenser is connected with a first condensate pump inlet, a first condensate pump outlet is connected with a first deaerator water inlet, a first deaerator water outlet is connected with a first boiler feed pump inlet, and a first boiler feed pump outlet is connected with a first boiler economizer; the system also comprises a gas generator set and a temperature and pressure reducing device, and solves the problem of frequent shutdown of the power generation system caused by unstable operation of the sintering system in the prior art.
However, the water supply of the temperature and pressure reducing device depends on the water supply pump of the second boiler, and the water supply system of the gas generator set needs to be regulated and changed due to the connection of the temperature and pressure reducing device, so that the gas generator set is not theoretically simple in practical transformation application.
Therefore, a new technical solution is needed to solve the above problems.
Disclosure of Invention
In view of the above, the present utility model aims at overcoming the drawbacks of the prior art, and its main objective is to provide a combined operation system of a gas boiler generator set and a sintering waste heat generator set, which can supplement the steam of the gas boiler when the waste heat boiler has no steam or is not enough to generate steam, and can utilize the steam of the gas boiler when the first turbine and the first generator are not in normal working state, and at the same time, the arrangement of the temperature and pressure reducing device is utilized, so that the steam can be used reasonably.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a combined operation system of a gas boiler generator set and a sintering waste heat generator set comprises
The gas boiler generator set is provided with a first steam pipeline, a first steam turbine and a first generator which are output from the top of the gas boiler, wherein a first-stage temperature and pressure reducing device is arranged on the first steam pipeline, the end part of the first steam pipeline, which is close to the steam output side of the first-stage temperature and pressure reducing device, is divided into two paths of output and is respectively defined as a first output pipeline and a second output pipeline, a first automatic stop valve is arranged on the first output pipeline and is connected to the first steam turbine, and a second automatic stop valve, a second-stage temperature and pressure reducing device and a third automatic stop valve are sequentially arranged on the second output pipeline along the output direction;
the sintering waste heat generator set is provided with a second steam pipeline, a second steam turbine and a second generator which are output from the top of the waste heat boiler, wherein the second steam pipeline is divided into a first section of pipeline and a second section of pipeline which are sequentially communicated, a fourth automatic stop valve is arranged on the first section of pipeline, and the output tail end of the second section of pipeline is connected to the second steam turbine; the output tail ends of the first section of pipeline and the second output pipeline are connected to the head end of the second section of pipeline together.
As a preferable scheme, the first automatic stop valve, the second automatic stop valve, the third automatic stop valve, the fourth automatic stop valve, the first-stage temperature and pressure reducing device and the second-stage temperature and pressure reducing device are respectively connected to the master controller.
As a preferable scheme, the exhaust side of the first turbine is provided with a first condenser, a first cooling tower, a first circulating water pump, a first condensate pump, a first deoxidizing tower and a first water supply pump.
As a preferable scheme, the hot water outlet end of the primary temperature and pressure reducing device is used as domestic water and/or is connected between the first condensate pump and the first deoxidizing tower to be connected into a water supply system of the gas boiler.
As a preferable scheme, a second condenser, a second cooling tower, a second circulating water pump, a second condensate pump, a second deoxidizing tower and a second water supply pump are arranged on the exhaust side of the second turbine.
As a preferable scheme, the hot water outlet end of the secondary temperature and pressure reduction device is used as domestic water and/or is connected between the second condensate pump and the second deoxidizing tower to be connected into a water supply system of the gas boiler.
As a preferable scheme, a third temperature and pressure reducing device is arranged on the second steam pipeline, and the master controller is connected with the third temperature and pressure reducing device.
As a preferable scheme, the cold water inlet ends of the first-stage temperature and pressure reducing device, the second-stage temperature and pressure reducing device and the third temperature and pressure reducing device are respectively connected to the water outlet end of an external tap water pipe.
Compared with the prior art, the utility model has obvious advantages and beneficial effects, and particularly, the technical scheme mainly comprises the steps of arranging the gas boiler generator set and the sintering waste heat generator set, and particularly, utilizing the first automatic stop valve, the second automatic stop valve, the third automatic stop valve, the fourth automatic stop valve, the first-stage temperature and pressure reduction device and the second-stage temperature and pressure reduction device, so that when no steam or insufficient steam is generated in the waste heat boiler, the steam of the gas boiler can be supplemented by the aid of the steam of the gas boiler, and the steam of the gas boiler can be utilized when the first turbine and the first generator are not in a normal working state, and meanwhile, the steam can be reasonably used by the aid of the setting of the temperature and pressure reduction device.
In addition, the water supply of the temperature and pressure reducing device is not dependent on the gas boiler generator set and the sintering waste heat generator set, so that the respective water supply circulation systems of the original gas boiler generator set and the sintering waste heat generator set are not required to be changed, the primary temperature and pressure reducing device and the secondary temperature and pressure reducing device can be directly purchased and connected to the market, and the connection and combination of the primary temperature and pressure reducing device and the secondary temperature and pressure reducing device are convenient for adjusting steam pressure parameters and do not influence the normal power generation work of the gas boiler generator set, for example: when a part of steam is separated and supplied to the first generator after the second-stage temperature and pressure reduction, the output steam pressure parameter of the first-stage temperature and pressure reduction device can be set in a relatively high value interval in a pressure range applicable to the first turbine and the first generator, and under the condition that a part of steam is not separated, the output steam pressure parameter of the first-stage temperature and pressure reduction device can be set in a relatively middle value interval in the pressure range applicable to the first turbine and the first generator.
In order to more clearly illustrate the structural features and efficacy of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is a diagram of a connection structure of a combined operation system of a gas boiler generator set and a sintering waste heat generator set according to an embodiment of the present utility model;
FIG. 2 is a diagram showing a connection structure of a combined operation system of a gas boiler generator set and a sintering waste heat generator set according to another embodiment of the present utility model.
The attached drawings are used for identifying and describing: the gas boiler 1, the first steam pipeline 2, the first turbine 3, the first generator 4, the first-stage temperature and pressure reduction device 5, the first automatic stop valve 6, the second automatic stop valve 7, the second-stage temperature and pressure reduction device 8, the third automatic stop valve 9, the waste heat boiler 10, the second turbine 11, the second generator 12, the first-stage pipeline 13, the second-stage pipeline 14, the fourth automatic stop valve 15, the third temperature and pressure reduction device 16, the first condenser 17, the first cooling tower 18, the first circulating water pump 19, the first condensate pump 20, the first deaeration tower 21, the first water supply pump 22, the second condenser 23, the second cooling tower 24, the second circulating water pump 25, the second condensate pump 26, the second deaeration tower 27, the second water supply pump 28, the first heat insulation water storage tank 29 and the second heat insulation water storage tank 30.
Detailed Description
Referring to fig. 1 to 2, specific structures of embodiments of the present utility model are shown.
In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
A combined operation system of a gas boiler generator set and a sintering waste heat generator set comprises the gas boiler generator set and the sintering waste heat generator set.
The gas boiler generator set is provided with a first steam pipeline 2, a first steam turbine 3 and a first generator 4 which are output from the top of a gas boiler 1, a first-stage temperature and pressure reducing device 5 is arranged on the first steam pipeline 2, the end part of the first steam pipeline 2, which is close to the steam output side of the first-stage temperature and pressure reducing device 5, is divided into two paths of output and is respectively defined as a first output pipeline and a second output pipeline, a first automatic stop valve 6 is arranged on the first output pipeline and is connected to the first steam turbine 3, and a second automatic stop valve 7, a second-stage temperature and pressure reducing device 8 and a third automatic stop valve 9 are sequentially arranged on the second output pipeline along the output direction;
the sintering waste heat generator set is provided with a second steam pipeline, a second steam turbine 11 and a second generator 12 which are output from the top of the waste heat boiler 10, wherein the second steam pipeline is divided into a first section of pipeline 13 and a second section of pipeline 14 which are sequentially communicated, a fourth automatic stop valve 15 is arranged on the first section of pipeline 13, and the output end of the second section of pipeline 14 is connected to the second steam turbine 11; the output ends of the first section of pipeline 13 and the second output pipeline are connected to the head end of the second section of pipeline 14 together. A third temperature and pressure reducing device 16 (the first temperature and pressure reducing device 5 and the second temperature and pressure reducing device 8 can be respectively defined as a first temperature and pressure reducing device and a second temperature and pressure reducing device, so as to show distinction) is arranged on the second steam pipeline, and the master controller is connected to the third temperature and pressure reducing device 16. The cold water inlet ends of the first-stage temperature and pressure reducing device 5, the second-stage temperature and pressure reducing device 8 and the third temperature and pressure reducing device 16 are respectively connected to the water outlet ends of the external tap water pipe. The first automatic stop valve 6, the second automatic stop valve 7, the third automatic stop valve 9, the fourth automatic stop valve 15, the first-stage temperature and pressure reducing device 5 and the second-stage temperature and pressure reducing device 8 are respectively connected to a master controller. The main controller opens and closes the first automatic stop valve 6, the second automatic stop valve 7, the third automatic stop valve 9, the fourth automatic stop valve 15, the first-stage temperature and pressure reducing device 5 and the second-stage temperature and pressure reducing device 8 according to the needs.
The exhaust side of the first turbine 3 is provided with a first condenser 17, a first cooling tower 18, a first circulating water pump 19, a first condensate pump 20, a first deoxidizing tower 21 and a first water supply pump 22. The exhaust steam discharged from a steam outlet at the lower part of the first steam turbine 3 is condensed into water through a first condenser 17, the first condensate pump 20 conveys the condensate in the first condenser 17 to a first deoxidization tower 21, the first circulating water pump 19 is connected between the first condenser 17 and a first cooling tower 18, and the output end of the first deoxidization tower 21 is connected with a first water supply pump 22 so as to supply water to the gas boiler 1 to generate steam and output the steam from the first steam pipeline 2. Of course, the hot water outlet end of the primary temperature and pressure reducing device 5 can be used as domestic water and/or connected between the first condensate pump 20 and the first deoxidizing tower 21 to be connected into the water supply system of the gas boiler 1. The hot water output from the hot water outlet end of the primary temperature and pressure reducing device 5 can be temporarily stored in a first heat-insulating water storage tank 29, and the first heat-insulating water storage tank is connected to a position between the first condensate pump 20 and the first deoxidizing tower 21 through a fifth automatic stop valve so as to be selectively connected to a water supply system of the gas boiler 1.
The exhaust side of the second turbine 11 is provided with a second condenser 23, a second cooling tower 24, a second circulating water pump 25, a second condensate pump 26, a second deoxidizing tower 27 and a second water feeding pump 28. The exhaust steam discharged from the steam outlet at the lower part of the second steam turbine 11 is condensed into water through the second condenser 23, the second condensate pump 26 conveys the condensed water in the second condenser 23 to the second deoxidizing tower 27, the second circulating water pump 25 is connected between the second condenser 23 and the second cooling tower 24, and the output end of the second deoxidizing tower 27 is connected with the second water feeding pump 28 so as to supply water to the waste heat boiler 10 to generate steam and output the steam from the second steam pipeline. Of course, the hot water outlet end of the secondary temperature and pressure reduction device 8 can be used as domestic water and/or connected between the second condensate pump 26 and the second deoxidizing tower 27 to be connected into the water supply system of the gas boiler 1. The hot water output from the hot water outlet end of the secondary temperature and pressure reduction device 8 can be temporarily stored in a second heat insulation water storage tank 30, and the second heat insulation water storage tank is connected to a position between the second condensate pump 26 and the second deoxidizing tower 27 through a sixth automatic stop valve so as to be selectively connected to a water supply system of the waste heat boiler 10.
And the tail gas discharge directions of the gas boiler 1 and the waste heat boiler 10 can be sequentially connected with a dust removing device, an induced draft fan and a chimney. The dust collector is a gravity dust collector, does not need additional energy consumption, and comprises a dust collection cavity, a flow baffle plate arranged in a staggered manner along the air flow direction and a dust collection cavity positioned at the bottom of the dust collection cavity. The gravity dust remover removes dust by utilizing the principle that the specific gravity of dust and gas is different, so that the raised dust is naturally precipitated from the gas by the gravity of the gravity dust remover, and the gravity dust remover has the advantages of simple structure, large volume, small resistance, easiness in maintenance and capability of avoiding overlarge dust content of discharged flue gas. The chimney is provided with a side air inlet and a top air outlet, and is provided with an inclined plate extending upwards in an inclined mode, and the position of the inclined plate is higher than that of the side air inlet. The flue gas that gets into side air inlet runs into the bottom surface of swash plate, and a small amount of dust drops in the chimney inner bottom, and on the opposite side of chimney, also refer to the opposite side opposite with the side air inlet, be provided with the door that can open and shut, be convenient for clear up the dust.
The utility model mainly aims at the design of the gas boiler 1 generator set and the sintering waste heat generator set, and particularly, the first automatic stop valve 6, the second automatic stop valve 7, the third automatic stop valve 9, the fourth automatic stop valve 15, the first-stage temperature and pressure reduction device 5 and the second-stage temperature and pressure reduction device 8 are utilized, so that when the waste heat boiler 10 does not generate steam or is insufficient in steam generation, the steam of the gas boiler 1 can be supplemented by the steam of the gas boiler 1, and when the first steam turbine 3 and the first generator 4 do not normally work, the steam of the gas boiler 1 can be utilized, and meanwhile, the arrangement of the temperature and pressure reduction devices is utilized, so that the reasonable use of the steam is facilitated.
In addition, in the utility model, the water supply of the temperature and pressure reduction device is not dependent on the generator set of the gas boiler 1 and the sintering waste heat generator set, so that the respective water supply circulation systems of the generator set of the gas boiler 1 and the sintering waste heat generator set are not required to be changed, the primary temperature and pressure reduction device 5 and the secondary temperature and pressure reduction device 8 can be directly purchased and applied to the market, and the primary temperature and pressure reduction device 5 and the secondary temperature and pressure reduction device 8 are connected and combined, so that the steam pressure parameters are convenient to adjust, and the normal power generation work of the generator set of the gas boiler 1 is not influenced, for example: when a part of steam is separated and supplied to the first generator 4 after the second-stage temperature and pressure reduction, the output steam pressure parameter of the first-stage temperature and pressure reduction device 5 can be set in a relatively high value interval in the pressure range applicable to the first turbine 3 and the first generator 4, and under the condition that a part of steam is not separated, the output steam pressure parameter of the first-stage temperature and pressure reduction device 5 can be set in a relatively middle value interval in the pressure range applicable to the first turbine 3 and the first generator 4.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the technical scope of the present utility model, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present utility model are still within the scope of the technical solutions of the present utility model.
Claims (8)
1. The utility model provides a coal gas boiler generating set and sintering waste heat generating set joint operation system which characterized in that: comprises the following steps of
The gas boiler generator set is provided with a first steam pipeline, a first steam turbine and a first generator which are output from the top of the gas boiler, wherein a first-stage temperature and pressure reducing device is arranged on the first steam pipeline, the end part of the first steam pipeline, which is close to the steam output side of the first-stage temperature and pressure reducing device, is divided into two paths of output and is respectively defined as a first output pipeline and a second output pipeline, a first automatic stop valve is arranged on the first output pipeline and is connected to the first steam turbine, and a second automatic stop valve, a second-stage temperature and pressure reducing device and a third automatic stop valve are sequentially arranged on the second output pipeline along the output direction;
the sintering waste heat generator set is provided with a second steam pipeline, a second steam turbine and a second generator which are output from the top of the waste heat boiler, wherein the second steam pipeline is divided into a first section of pipeline and a second section of pipeline which are sequentially communicated, a fourth automatic stop valve is arranged on the first section of pipeline, and the output tail end of the second section of pipeline is connected to the second steam turbine; the output tail ends of the first section of pipeline and the second output pipeline are connected to the head end of the second section of pipeline together.
2. The gas boiler generator set and sintering waste heat generator set combined operation system according to claim 1, wherein: the first automatic stop valve, the second automatic stop valve, the third automatic stop valve, the fourth automatic stop valve, the first-stage temperature and pressure reducing device and the second-stage temperature and pressure reducing device are respectively connected to the master controller.
3. The gas boiler generator set and sintering waste heat generator set combined operation system according to claim 1, wherein: the exhaust side of the first turbine is provided with a first condenser, a first cooling tower, a first circulating water pump, a first condensate pump, a first deoxidizing tower and a first water supply pump.
4. The combined operation system of the gas boiler generator set and the sintering waste heat generator set according to claim 3, wherein: the hot water outlet end of the primary temperature and pressure reducing device is used as domestic water and/or is connected between the first condensate pump and the first deoxidizing tower to be connected into a water supply system of the gas boiler.
5. The gas boiler generator set and sintering waste heat generator set combined operation system according to claim 1, wherein: the exhaust side of the second turbine is provided with a second condenser, a second cooling tower, a second circulating water pump, a second condensate pump, a second deoxidizing tower and a second water supply pump.
6. The combined operation system of the gas boiler generator set and the sintering waste heat generator set according to claim 5, wherein: the hot water outlet end of the secondary temperature and pressure reduction device is used as domestic water and/or is connected between the second condensate pump and the second deoxidizing tower to be connected into a water supply system of the gas boiler.
7. The gas boiler generator set and sintering waste heat generator set combined operation system according to claim 2, wherein: and a third temperature and pressure reducing device is arranged on the second steam pipeline, and the master controller is connected with the third temperature and pressure reducing device.
8. The combined operation system of the gas boiler generator set and the sintering waste heat generator set according to claim 7, wherein: the cold water inlet ends of the first temperature and pressure reducing device, the second temperature and pressure reducing device and the third temperature and pressure reducing device are respectively connected to the water outlet end of the external tap water pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223490212.1U CN219034829U (en) | 2022-12-27 | 2022-12-27 | Combined operation system of gas boiler generator set and sintering waste heat generator set |
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| CN202223490212.1U CN219034829U (en) | 2022-12-27 | 2022-12-27 | Combined operation system of gas boiler generator set and sintering waste heat generator set |
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| CN219034829U true CN219034829U (en) | 2023-05-16 |
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| CN202223490212.1U Active CN219034829U (en) | 2022-12-27 | 2022-12-27 | Combined operation system of gas boiler generator set and sintering waste heat generator set |
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Effective date of registration: 20231116 Address after: Building 1296, Haiyi Haoting Yufeng, No. 68, Hujing Avenue, Houjie, Dongguan, Guangdong 523000 Patentee after: Guangdong Xinkaineng Engineering Technology Co.,Ltd. Patentee after: Yangjiang Guangrun Energy Saving Technology Co.,Ltd. Patentee after: Yulin Guangrun waste heat power generation Co.,Ltd. Patentee after: Ningde Kaineng Environmental Protection Energy Co.,Ltd. Patentee after: Dongguan Chuanneng Waste Heat Power Generation Co.,Ltd. Address before: Room 1405, building 2, area C, Dongguan Tian'an Digital City, No.1, Huangjin Road, Hongfu community, Nancheng street, Dongguan City, Guangdong Province, 523000 Patentee before: GUANGDONG KAINENG ENVIRONMENTAL PROTECTION & ENERGY Co.,Ltd. Patentee before: Yangjiang Guangrun Energy Saving Technology Co.,Ltd. Patentee before: Yulin Guangrun waste heat power generation Co.,Ltd. Patentee before: Ningde Kaineng Environmental Protection Energy Co.,Ltd. |
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