CN212029678U - Exhaust steam waste heat recovery and heat supply system of direct air cooling unit - Google Patents
Exhaust steam waste heat recovery and heat supply system of direct air cooling unit Download PDFInfo
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- CN212029678U CN212029678U CN202020692622.6U CN202020692622U CN212029678U CN 212029678 U CN212029678 U CN 212029678U CN 202020692622 U CN202020692622 U CN 202020692622U CN 212029678 U CN212029678 U CN 212029678U
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Abstract
The utility model relates to an exhaust steam waste heat recovery and heat supply system of a direct air cooling unit, which comprises a heat supply network condenser; the high back pressure heat supply unit air cooling island and the steam exhaust device thereof are connected through a first steam exhaust pipe and a first steam exhaust condensate pipe; the adjacent unit air cooling island and the adjacent steam exhaust device are connected through a second steam exhaust pipe and a second steam exhaust condensate pipe; the first exhaust steam pipe is connected with the heat supply network condenser through a third exhaust steam pipe; the second exhaust steam pipe is connected with the heat supply network condenser through a fifth exhaust steam pipe; the first steam exhaust pipe is connected with the second steam exhaust pipe through a fourth steam exhaust pipe. In the heating period of the utility model, the steam exhaust of the high back pressure heat supply unit can be controlled to lead to the steam volume of the heat supply network condenser and the air cooling island near the machine so as to realize the thermoelectric decoupling operation, and the air cooling island is always completely isolated and safe and anti-freezing; in addition, when the high back pressure heat supply unit is shut down, the waste heat of the exhaust steam close to the machine can be led to the heat supply network condenser to supplement heat supply, and the heat supply guarantee is improved.
Description
Technical Field
The utility model relates to a heat supply technical field especially relates to a direct air cooling unit exhaust steam waste heat recovery heating system.
Background
For a pure condensing thermal power generating set, the loss of a steam turbine exhaust cold source accounts for more than 50% of the input heat of energy, which belongs to exhaust waste heat for a thermal power generating steam turbine, but belongs to serious waste of energy for resident heating with lower energy quality requirement. The high back pressure heat supply technology (also called low-level energy heat supply technology) is an energy-saving heat supply technology capable of effectively recovering the exhaust steam waste heat of the unit for heating, namely, the circulating water return of a heat supply network is used as the exhaust steam cooling water to directly recover the exhaust steam waste heat of the unit for heating in the heating period, the technology realizes the effective recovery and utilization of the exhaust steam waste heat of the unit, the heat supply capacity of the unit is greatly improved, and the heat supply energy consumption cost is reduced.
For a direct air cooling unit, in order to realize the recovery of the waste heat of the exhausted steam of the unit, an isolation valve is additionally arranged on a steam exhaust branch pipe above an air cooling island, a bypass branch pipe is additionally arranged on a main steam exhaust pipeline from a low-pressure cylinder of a steam turbine to the air cooling island, and the exhausted steam of the unit is led to a newly-added heat supply network condenser. In the heating period, the exhaust steam volume entering the air cooling island and the heat supply network condenser can be respectively adjusted according to different heat supply load requirements of residents, and the requirements of thermoelectric decoupling and flexible operation of the unit can be met. However, since the isolation valves on the steam exhaust branch pipes of the air cooling island are generally large-caliber vacuum isolation valves above DN2000, when the ambient temperature is low in winter, the valves frequently act, and the danger of untight closing and steam leakage and freezing of the branch pipes of the air cooling island easily occurs. In order to avoid the air cooling island from freezing, the steam can be always fed into the reserved branch rows in the whole heating period, but a large energy loss can be formed; the most ideal operation mode is that the isolation valves of the steam exhaust branch pipes above the air cooling island are all closed in the whole heating period, and the exhaust steam of the unit is all led to the heat supply network condenser for heating, but the defects of electricity fixation by heat and inflexible operation exist, and the peak regulation requirement of a power grid cannot be met. Therefore, when the conventional air cooling unit is used for high-back-pressure heat supply, the problems of flexible operation and incapability of preventing freezing of the air cooling island exist.
In addition, for a thermal power plant provided with two air cooling units, the thermal power plant is limited by the scale of the peripheral heat supply market, generally only one air cooling unit is subjected to high back pressure heat supply technical transformation, the other unit still adopts a conventional extraction and condensation type operation mode, once the high back pressure heat supply unit breaks down and stops, the heat supply capacity of the whole plant only depending on one extraction and condensation unit cannot meet the heat supply guarantee requirement, and the heat supply safety of residents is influenced.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
In view of the above-mentioned shortcoming, the deficiency of prior art, the utility model provides a direct air cooling unit exhaust steam waste heat recovery heating system, it has solved the flexible operation that exists and the frostproofing unable double-complete technical problem in air cooling island when conventional air cooling unit high back pressure heat supply operation.
(II) technical scheme
In order to achieve the above object, the utility model discloses a main technical scheme include:
in a first aspect, the embodiment of the utility model provides a direct air cooling unit exhaust steam waste heat recovery heating system, direct air cooling unit exhaust steam waste heat recovery heating system includes:
a heat supply network condenser;
the high-back-pressure heat supply unit comprises a high-back-pressure heat supply unit air cooling island and a high-back-pressure heat supply unit steam exhaust device, the high-back-pressure heat supply unit air cooling island and the high-back-pressure heat supply unit steam exhaust device are connected through a first steam exhaust pipe and a first steam exhaust condensate pipe to form a steam exhaust loop, and the first steam exhaust pipe is connected with the heat supply network condenser through a third steam exhaust pipe;
the adjacent unit comprises an adjacent unit air cooling island and an adjacent unit steam exhaust device, the adjacent unit air cooling island and the adjacent unit steam exhaust device are connected through a second steam exhaust pipe and a second steam exhaust condensate pipe to form a steam exhaust loop, and the second steam exhaust pipe is connected with the heat supply network condenser through a fifth steam exhaust pipe;
the heat supply network condenser is provided with an exhaust steam drainage pump, and the exhaust steam drainage pump is connected with the high-back-pressure heat supply unit through a first exhaust steam drainage return pipe;
the first steam exhaust pipe is connected with the second steam exhaust pipe through a fourth steam exhaust pipe, the first steam exhaust condensate pipe is connected with the second steam exhaust condensate pipe through a third steam exhaust condensate pipe, the fourth steam exhaust condensate pipe is provided with a first valve, and the third steam exhaust condensate pipe is provided with a second valve.
Optionally, a third valve is disposed on the first steam-exhaust pipe, and the third valve is located downstream of a junction of the first steam-exhaust pipe and the fourth steam-exhaust pipe and upstream of the high back-pressure heating unit air cooling island.
Optionally, a fourth valve is disposed on the third steam exhaust pipe.
Optionally, the first steam exhaust pipe is provided with a fifth valve, and the fifth valve is located upstream of a connection of the first steam exhaust pipe and the third steam exhaust pipe.
Optionally, the second exhaust steam pipe is connected with the heat supply network condenser through a fifth exhaust steam pipe; and the exhaust steam drainage pump is connected with the steam discharging device of the adjacent unit through a second exhaust steam drainage return pipe.
Optionally, a sixth valve is arranged between the fifth steam exhaust pipes.
Optionally, the second steam exhaust pipe is provided with a seventh valve, and the seventh valve is located downstream of a connection of the second steam exhaust pipe and the fourth steam exhaust pipe.
Optionally, the fourth steam exhaust pipe is provided with a first flow monitoring device;
optionally, the third exhaust steam condensate pipe is provided with a second flow monitoring device;
optionally, the exhaust steam waste heat recovery heating system of the direct air cooling unit further comprises a flow controller, and the flow controller is connected with the first valve, the second valve, the first flow monitoring device and the second flow monitoring device.
(III) advantageous effects
The utility model has the advantages that: the utility model discloses a direct air cooling unit exhaust steam waste heat recovery heating system, because the exhaust steam pipe that adopts high back pressure heat supply unit and adjacent unit links to each other with exhaust steam condensate line, the exhaust steam pipe of adjacent unit links to each other with the heat supply network condenser, in the heating period, high back pressure heat supply unit exhaust steam accessible control causes the steam volume of heat supply network condenser and machine-attached air cooling island, realize the operation of thermoelectric decoupling zero, for prior art, the air cooling island can be kept apart completely all the time to high back pressure heat supply unit, ensure that unit safety is frostproofing, in addition, when high back pressure heat supply unit shuts down, machine-attached exhaust steam waste heat can cause the heat supply network condenser to supply heat, improve the heat supply guarantee nature of whole factory.
Drawings
Fig. 1 is a schematic structural diagram of the exhaust steam waste heat recovery heating system of the direct air cooling unit of the present invention.
[ description of reference ]
1: a first valve; 2: a second valve; 3: a third valve; 4: a fourth valve; 5: a fifth valve; 6: a sixth valve; 7: a seventh valve; 8: a first flow monitoring device; 9: a second flow monitoring device;
10: a steam exhaust device of the high back pressure heat supply unit; 11: an adjacent unit steam exhaust device; 12: a high back pressure heat supply unit air cooling island; 13: an adjacent unit air cooling island; 14: a heat supply network condenser; 15: a waste steam drain pump;
20: a first exhaust pipe; 21: a first dead steam condensate pipe; 22: a third exhaust pipe; 23: a second exhaust pipe; 24: a second exhaust steam condensate pipe; 25: a fourth exhaust pipe; 26: a fifth exhaust pipe; 27: a third exhaust steam condensate pipe; 28: a first dead steam drainage return pipe; 29: and the second dead steam drain return pipe.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present invention, examples of which are illustrated in the accompanying drawings.
The embodiment of the utility model provides a direct air cooling unit exhaust steam waste heat recovery heating system, because the exhaust steam pipe that adopts high back pressure heat supply unit and adjacent unit links to each other with exhaust steam condensate line, the exhaust steam pipe of adjacent unit links to each other with the heat supply network condenser, in the heating period, high back pressure heat supply unit exhaust steam accessible control causes the steam volume of heat supply network condenser and near machine air cooling island, realize the operation of thermoelectric decoupling zero, for prior art, high back pressure heat supply unit can keep apart the air cooling island completely all the time, ensure that unit safety is frostproofing, in addition, when high back pressure heat supply unit shut down, near machine exhaust steam waste heat can cause the heat supply network condenser to supply heat, improve the heat supply guarantee of whole factory.
In order to better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Detailed description of the preferred embodiments
Example (b):
referring to fig. 1, the utility model provides a direct air cooling unit exhaust steam waste heat recovery heating system, it includes heat supply network condenser 14, high back pressure heat supply unit, adjacent unit. The heat supply network condenser 14 is used for supplying heat to heat users; the high-back-pressure heat supply unit comprises a high-back-pressure heat supply unit steam exhaust device 10 and a high-back-pressure heat supply unit air cooling island 12, the high-back-pressure heat supply unit steam exhaust device and the high-back-pressure heat supply unit air cooling island 12 are connected through a first steam exhaust pipe 20 and a first steam exhaust condensate pipe 21, the first steam exhaust pipe 20 is connected with a heat supply network condenser 14 through a third steam exhaust pipe 22, all the steam exhaust exhausted by the high-back-pressure heat supply unit steam exhaust device 10 enters the heat supply network condenser 14 to be cooled in a heating period, and the cooled steam exhaust condensate returns to the high-back-pressure heat supply unit steam exhaust device 10. In the non-heating period, all the exhaust steam discharged by the steam discharge device 10 of the high-back-pressure heat supply unit enters the air cooling island 12 of the high-back-pressure heat supply unit for cooling, and the exhaust steam condensate water obtained by cooling returns to the steam discharge device of the high-back-pressure heat supply unit from the exhaust steam condensate pipe for recycling.
The adjacent unit comprises an adjacent unit steam exhaust device 11 and an adjacent unit air cooling island 13, the adjacent unit steam exhaust device and the adjacent unit air cooling island 13 are connected through a second steam exhaust pipe 23 and a second steam exhaust condensate pipe 24, all the steam exhaust discharged by the adjacent unit steam exhaust device 11 enters the adjacent unit air cooling island 13 to be cooled, and the steam exhaust condensate water obtained by cooling returns to the steam exhaust device of the adjacent unit from the steam exhaust condensate pipe to be recovered.
In order to solve the problems of flexibility of the high-backpressure heat supply unit and freezing prevention of the air cooling island 12 of the high-backpressure heat supply unit: increasing a fourth exhaust pipe 25 of the high back pressure heat supply unit and the adjacent unit, and arranging a first valve 1 on the fourth exhaust pipe 25; correspondingly, an air cooling island of the high-back-pressure heat supply unit and a third exhaust steam condensate pipe 27 of the air cooling island of the adjacent unit are added, a second valve 2 is additionally arranged on the third exhaust steam condensate pipe 27, the steam inlet third valve 3 of the air cooling island 12 of the high-back-pressure heat supply unit is always closed in the whole heating period, all exhaust steam discharged by the steam discharge device 10 of the high-back-pressure heat supply unit enters the heat supply network condenser 14, and safe operation of the air cooling island is guaranteed. If the power generation load of the high back pressure heat supply unit is high and the heat of the exhaust steam cannot be completely recovered by the heat supply network condenser for heating, the first valve 1 on the fourth exhaust steam pipe 25 and the second valve 2 on the third exhaust steam condensate pipe 27 are opened, the exhaust steam discharged by the exhaust steam device 10 of the high back pressure heat supply unit is divided into two parts, one part enters the heat supply network condenser 14, and the other part enters the air cooling island 13 of the adjacent unit through the fourth exhaust steam pipe 25 for cooling. If when the generating load of the high back pressure heat supply unit is low and the waste steam heat can be completely recovered, the first valve 1 and the second valve 2 are closed, and the waste steam of the high back pressure heat supply unit completely enters the heat supply network condenser for heating. Therefore, the heat supply flexibility of the air cooling high back pressure heat supply unit is improved while the air cooling island is completely isolated and prevented from freezing in the heating period.
Meanwhile, the heat supply network condenser is provided with an exhaust steam drain pump, the exhaust steam drain pump is connected with the high-back-pressure heat supply unit steam exhaust device through a first exhaust steam drain return pipe, and exhaust steam of the high-back-pressure heat supply unit entering the heat supply network condenser is drained to the high-back-pressure unit steam exhaust device.
Further, a fourth valve 4 is arranged on the third exhaust pipe 22, and the fourth valve 4 can further control the amount of exhaust steam entering the heat supply network condenser 14 from the exhaust device 10 of the high-back-pressure heat supply unit, so that the thermoelectric decoupling flexible operation of the high-back-pressure heat supply unit can be better realized.
In a more preferred embodiment, referring to fig. 1, the first spent steam pipe 20 is provided with a fifth valve 5, the fifth valve 5 being located upstream of the connection of the first and third spent steam pipes 20, 22. Once the high back pressure heat supply unit stops due to a fault in the heating period, in order to guarantee heat supply, the fifth valve 5 is closed, the first valve 1 and the second valve 2 are opened, the third valve 3 is still kept closed, and partial exhaust steam discharged by the steam discharge devices 11 of the adjacent units enters the heat supply network condenser 14 through the fourth exhaust steam pipe 25, so that the heat supply guarantee capacity can be effectively improved.
In another embodiment, referring to fig. 1, the second exhaust pipe 23 is connected to the heat supply network condenser through a fifth exhaust pipe 26, and a sixth valve 6 is disposed between the fifth exhaust pipes 26. Once the high back pressure heat supply unit stops due to a fault in the heating period, the fourth valve 4 is closed, the sixth valve 6 is opened to ensure heat supply, the third valve 3 is still closed, partial exhaust steam discharged by the steam discharge device 11 of the adjacent unit enters the heat supply network condenser 14 through the fifth exhaust steam pipe 26, and the heat supply guarantee capacity can be effectively improved.
Meanwhile, the exhaust steam drain pump is connected with the steam exhaust device of the adjacent unit through a second exhaust steam drain return pipe; and leading the exhaust steam of the adjacent unit entering the heat supply network condenser to an exhaust steam device of the adjacent unit.
Furthermore, the second exhaust steam pipe 23 is provided with a seventh valve 7, the seventh valve 7 is located at the downstream of the connection position of the second exhaust steam pipe 23 and the fourth exhaust steam pipe 25, once the high back pressure heat supply unit stops working due to a fault in the heating period, the seventh valve 7 can be closed, and all the exhaust steam discharged by the steam discharge devices 11 of the adjacent units enters the heat supply network condenser 14 through the fourth exhaust steam pipe 25 or the fifth exhaust steam pipe 26, so that the heat supply capacity is fully guaranteed.
Further, the fourth exhaust steam pipe 25 is provided with a first flow monitoring device 8; the first flow monitoring device 8 can detect the flow of the exhaust steam on the fourth exhaust steam pipe 25.
The third dead steam condensation water pipe 27 is provided with a second flow monitoring device 9, and the second flow monitoring device 9 can detect the flow of the dead steam on the third dead steam condensation water pipe 27.
Further, the exhaust steam waste heat recovery heating system of the direct air cooling unit further comprises a flow controller, and the flow controller is connected with the first valve 1, the second valve 2, the first flow monitoring device 8 and the second flow monitoring device 9. In the running process of transferring the exhaust steam of the high back pressure heat supply unit to the air cooling island 13 of the adjacent unit, the flow on the fourth exhaust steam pipe 25 and the exhaust steam condensate communicating pipe of the air cooling island are monitored, namely the first flow monitoring device 8 and the second flow monitoring device 9 are monitored, then the opening degrees of the first valve 1 and the second valve 2 are adjusted according to the flow information displayed on the first flow monitoring device 8 and the second flow monitoring device 9, the equivalent amount of the exhaust steam led to the exhaust steam communicating pipe and the condensate returning from the exhaust steam condensate communicating pipe can be ensured, and therefore the electricity generation of the direct air cooling unit can be ensured not to be influenced by the exhaust steam.
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; either as communication within the two elements or as an interactive relationship of the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless otherwise expressly stated or limited, a first feature may be "on" or "under" a second feature, and the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate. Also, a first feature "on," "above," and "over" a second feature may be directly or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lower level than the second feature.
In the description herein, the description of the terms "one embodiment," "some embodiments," "an embodiment," "an example," "a specific example" or "some examples" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that modifications, alterations, substitutions and variations may be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. The utility model provides a direct air cooling unit exhaust steam waste heat recovery heating system which characterized in that, direct air cooling unit exhaust steam waste heat recovery heating system includes:
a heat supply network condenser;
the high-back-pressure heat supply unit comprises a high-back-pressure heat supply unit air cooling island and a high-back-pressure heat supply unit steam exhaust device, the high-back-pressure heat supply unit air cooling island and the high-back-pressure heat supply unit steam exhaust device are connected through a first steam exhaust pipe and a first steam exhaust condensate pipe to form a steam exhaust loop, and the first steam exhaust pipe is connected with the heat supply network condenser through a third steam exhaust pipe;
the adjacent unit comprises an adjacent unit air cooling island and an adjacent unit steam exhaust device, and the adjacent unit air cooling island and the adjacent unit steam exhaust device are connected through a second steam exhaust pipe and a second steam exhaust condensate pipe to form a steam exhaust loop;
the heat supply network condenser is provided with an exhaust steam drain pump, and the exhaust steam drain pump is connected with the exhaust steam device of the high back pressure heat supply unit through a first exhaust steam drain return pipe;
the first steam exhaust pipe is connected with the second steam exhaust pipe through a fourth steam exhaust pipe, the first steam exhaust condensate pipe is connected with the second steam exhaust condensate pipe through a third steam exhaust condensate pipe, the fourth steam exhaust condensate pipe is provided with a first valve, and the third steam exhaust condensate pipe is provided with a second valve.
2. The system of claim 1, wherein a third valve is disposed on the first exhaust pipe, and the third valve is located downstream of a junction of the first exhaust pipe and the fourth exhaust pipe and upstream of the high back pressure heat supply unit air cooling island.
3. The exhaust steam waste heat recovery heating system of the direct air cooling unit according to claim 2, wherein a fourth valve is arranged on the third exhaust steam pipe.
4. The exhaust steam waste heat recovery and heating system of the direct air cooling unit according to any one of claims 1 to 3, wherein the first exhaust steam pipe is provided with a fifth valve, and the fifth valve is located upstream of a connection position of the first exhaust steam pipe and the third exhaust steam pipe.
5. The exhaust steam waste heat recovery and supply system of the direct air cooling unit as claimed in any one of claims 1 to 3, wherein the second exhaust steam pipe is connected with the heat supply network condenser through a fifth exhaust steam pipe, and the exhaust steam drain pump is connected with the steam exhaust device of the adjacent unit through a second exhaust steam drain return pipe.
6. The exhaust steam waste heat recovery heating system of the direct air cooling unit according to claim 5, wherein a sixth valve is arranged between the fifth exhaust steam pipes.
7. The exhaust steam waste heat recovery and heating system of the direct air cooling unit according to any one of claims 1 to 3, wherein the second exhaust steam pipe is provided with a seventh valve, and the seventh valve is located downstream of a connection position of the second exhaust steam pipe and the fourth exhaust steam pipe.
8. The exhaust steam waste heat recovery heating system of the direct air cooling unit according to any one of claims 1 to 3, wherein the fourth exhaust steam pipe is provided with a first flow monitoring device.
9. The exhaust steam waste heat recovery heating system of the direct air cooling unit according to claim 8, wherein the third exhaust steam condensate pipe is provided with a second flow monitoring device.
10. The direct air cooling unit exhaust steam waste heat recovery heating system of claim 9, further comprising a flow controller connected to the first valve, the second valve, the first flow monitoring device and the second flow monitoring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020692622.6U CN212029678U (en) | 2020-04-29 | 2020-04-29 | Exhaust steam waste heat recovery and heat supply system of direct air cooling unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020692622.6U CN212029678U (en) | 2020-04-29 | 2020-04-29 | Exhaust steam waste heat recovery and heat supply system of direct air cooling unit |
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| CN212029678U true CN212029678U (en) | 2020-11-27 |
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| CN202020692622.6U Active CN212029678U (en) | 2020-04-29 | 2020-04-29 | Exhaust steam waste heat recovery and heat supply system of direct air cooling unit |
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Effective date of registration: 20201222 Address after: 16F, building 1, No. 16 yard, West Fourth Ring Road middle, Haidian District, Beijing 100089 Patentee after: GUODIAN LONGYUAN ENERGY SAVING TECHNOLOGY Co.,Ltd. Address before: 16F, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing 100039 Patentee before: BEIJING GUODIAN BLUE SKY ENERGY SAVING TECHNOLOGY DEVELOPMENT Co.,Ltd. |
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Address after: 102200 room 5413, building 305, Guodian New Energy Technology Research Institute, future science city, Beiqijia Town, Changping District, Beijing Patentee after: Guoneng Longyuan Lantian Energy Saving Technology Co.,Ltd. Address before: 16F, building 1, No. 16 yard, West Fourth Ring Road middle, Haidian District, Beijing 100089 Patentee before: GUODIAN LONGYUAN ENERGY SAVING TECHNOLOGY Co.,Ltd. |
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