CN218780387U - Wide-load flexible heat supply operation device for thermal power plant - Google Patents
Wide-load flexible heat supply operation device for thermal power plant Download PDFInfo
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- CN218780387U CN218780387U CN202222939684.4U CN202222939684U CN218780387U CN 218780387 U CN218780387 U CN 218780387U CN 202222939684 U CN202222939684 U CN 202222939684U CN 218780387 U CN218780387 U CN 218780387U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
A wide-load flexible heat supply operation device for a thermal power plant. In the prior art, a unit is allowed to be put into heat supply operation when the rated steam inlet quantity is more than 70%, and the reported peak shaving depth of the unit which cannot meet the requirement of a power grid is 30% of rated load. The utility model discloses the constitution includes: high pressure jar (15), intermediate pressure jar (16), the high pressure jar passes through liquid accuse butterfly valve (14) on the pipeline, pneumatic control valve (13) are connected with high pressure heat supply female pipe, the high pressure jar is connected with steam-operated check valve (12), extraction check valve (8) through the pipeline respectively, take over to heating system between extraction check valve and the extraction steam electric valve (11), install electric valve (10) on heating system's the pipeline in proper order, steam-operated valve B (9), desuperheater (3), the desuperheater respectively with manual valve A (2), contrary steam valve (4), contrary steam valve in proper order with manual valve B (5), steam-operated valve A (6), manual valve C (7). The utility model is used for wide load flexibility heat supply operation device of steam power plant.
Description
The technical field is as follows:
the utility model relates to a combined heat and power units heat supply technical field, concretely relates to be used for wide load flexibility heat supply running device of steam power plant.
Background art:
in order to meet the requirement of industrial heat of thermal power plant heat users, the thermal power plant is designed to have industrial steam supply capacity, when a unit adopts a cogeneration condensing steam turbine, and is provided with two-stage heat supply steam extraction, the first-stage industrial steam extraction of the steam turbine is extracted from a high-pressure cylinder steam exhaust pipeline, namely 'cold steam extraction', the second-stage industrial steam extraction is extracted from a medium-pressure cylinder steam exhaust pipeline, namely 'medium-discharge steam extraction', check valves, quick shut-off valves and safety valves are arranged on the first-stage industrial steam extraction and second-stage industrial steam extraction pipelines of the steam turbine, and a quick shut-off valve with an adjusting function is arranged on the first-stage industrial steam extraction pipeline of the steam turbine, the adjusting range is 20-100%, and the steam is supplied to industrial users after temperature reduction; the secondary industrial extraction steam controls the extraction steam pressure through a heat supply adjusting butterfly valve arranged on a communication pipe of the medium-low pressure cylinder, so that the requirement of an industrial user is met, and the unit is allowed to be put into heat supply operation when the rated steam inlet amount is more than 70%; according to the requirements of a power grid, reporting a rated load with a peak shaving depth of 30% by a thermal power plant unit; therefore, the prior art can not meet the requirements of a power grid;
the high-pressure heating system in the prior art only has one pipeline led out from the outlet of the high-pressure cylinder, and has single structure and inflexible operation mode.
The utility model has the following contents:
the utility model aims at providing a be used for wide load flexibility heat supply running device of steam power plant. This structure can make steam turbine, pneumatic governing valve, liquid accuse butterfly valve, steam extraction check valve, steam extraction electrically operated gate, heating system cooperation setting, improves the external heat supply ability of steam turbine unit of steam power plant, causes the influence to the heat consumer when avoiding the low-load.
The above purpose is realized by the following technical scheme:
a wide load flexibility heating operation device for a thermal power plant, comprising: high pressure jar, intermediate pressure jar, high pressure jar pass through the female union coupling of liquid accuse butterfly valve, pneumatic control valve on the pipeline and high pressure heat supply, high pressure jar be connected with steam-operated check valve, extraction check valve through the pipeline respectively, extraction check valve and extraction electric valve between take over to heating system, install electric valve, steam-operated check valve B, desuperheater on heating system's the pipeline in proper order, the desuperheater be connected with manual valve A, contrary steam valve respectively, contrary steam valve be connected with manual valve B, steam-operated check valve A, manual valve C in proper order.
The wide-load flexible heat supply operation device for the thermal power plant is characterized in that the steam extraction electric door is connected with the high-pressure heater through a pipeline, the intermediate pressure cylinder is connected with the low-pressure cylinder, and the manual door C is connected with the condensation water pipe.
Has the advantages that:
1. the utility model relates to a be used for wide load flexibility heat supply operating means of steam power plant, this structure adopts pneumatic control valve, liquid accuse butterfly valve, steam extraction check valve, steam extraction electric door, heating system to mutually support the setting, effectively improves the external heating capacity of steam turbine group of steam power plant, causes the influence to the heat consumer when avoiding the low-load, satisfies the electric wire netting requirement.
The utility model discloses a pipeline that draws forth before the structure increases the steam extraction check valve connects to high-pressure heating system, sets up the desuperheating water system simultaneously on the pipeline, has increased the mode of thermoelectricity steam turbine heat supply operation like this, through switching heating pipe way system and temperature reduction control, can satisfy the requirement of external heat supply pressure and temperature under the multiple load of unit.
The utility model discloses a structure setting heat supply is nimble, and the operation is reliable, and the thermal power turbo generator set that can guarantee the heat supply homoenergetic provides external heat supply when wide load operation, guarantees equipment safety and heat supply parameter simultaneously.
The utility model discloses when the thermal power turbo generator set load of heat supply is less than 50% rated load, the high pressure feed ware operation of usable withdraw from the steam turbine will be one section backheat and is taken out the steam and switch to the heating system operation, and is higher because of one section temperature of taking out the steam, just can satisfy after needing to carry out the desuperheating to steam to guarantee the parameter of the external heat supply of thermal power plant, satisfy hot user's requirement.
The utility model discloses when the thermal power turbo generator set load of heat supply is higher than 50% rated load, the heating system and the annex of usable steam turbine itself carry out the heat supply parameter and adjust, mainly include heating system pneumatic control valve control pressure, utilize the pneumatic cylinder admission governing valve of the little steam turbine of pass to improve high-pressure cylinder exhaust pressure.
The utility model discloses a structure has embodied cogeneration's energy-conserving technical thinking, will produce huge economic benefits, environmental benefit and social in the aspect of energy saving and emission reduction, is favorable to thermal power plant's pluralism to manage, also accords with the needs of unit degree of depth peak regulation.
The utility model discloses a structure is used for realizing in unit 30% to 100% load interval, realizes that the unit satisfies the industry and the civilian heat supply function of rated heat supply parameter, has overcome the limitation of the heat supply more than 70% load of the original design of unit to reduce the heat supply variety and the economic nature of unit.
The utility model discloses in operation adjustment process, need do and make when one section steam extraction carries out industry heat supply, keep high pressure feed water heater's water side operation to make high pressure feed water heater be in hot standby state always, during the unit lift load, drop into the thermal stress of #1 high time-lapse tube sheet again, thereby protect high pressure feed water heater.
The utility model discloses mainly when the low-load, the requirement of industry heat supply can not be satisfied to high exhaust pressure, but the steam parameter of one section steam extraction this moment just in time is close with the industry heat supply steam parameter of design, reduces the damage to high pressure feed water heater in order to prevent high pressure feed water heater admission simultaneously, so withdraw from high pressure feed water heater operation, carries out industry heat supply with one section steam extraction, and has protected high pressure feed water heater, has also improved the heat utilization ratio of unit, improves unit efficiency.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
Wherein: 1. the system comprises a high-pressure heater, 2, manual valves A,3, a desuperheater, 4, a reverse valve, 5, manual valves B,6, steam valves A,7, manual valves C,8, a steam extraction check valve, 9, steam valves B,10, electric valves, 11, a steam extraction electric valve, 12, a steam extraction check valve, 13, a pneumatic regulating valve, 14, a hydraulic control butterfly valve, 15, a high-pressure cylinder, 16 and an intermediate pressure cylinder.
The specific implementation mode is as follows:
example 1:
a wide load flexibility heating operation device for a thermal power plant, comprising: high pressure cylinder 15, intermediate pressure cylinder 16, the high pressure cylinder pass through the female union coupling of liquid accuse butterfly valve 14, pneumatic control valve 13 and high pressure heat supply on the pipeline, the high pressure cylinder be connected with steam-operated check valve 12, extraction check valve 8 through the pipeline respectively, extraction check valve and extraction electric valve 11 between take over to heating system, install electric valve 10, steam-operated check valve B9, desuperheater 3 on heating system's the pipeline in proper order, the desuperheater be connected with manual valve A2, contrary steam-operated check valve 4 respectively, contrary steam-operated check valve be connected with manual valve B5, steam-operated check valve A6, manual valve C7 in proper order.
Example 2:
according to the wide-load flexible heat supply operation device for the thermal power plant in the embodiment 1, the steam extraction electric door is connected with the high-pressure heater 1 through a pipeline, and the intermediate pressure cylinder is connected with the low-pressure cylinder. And the manual door C is connected with the condensation water pipe.
The wide-load flexibility heat supply operation device for the thermal power plant can realize the industrial heat supply function that the unit meets rated heat supply parameters in the load range of 30-100% of the unit, thereby improving the overall economy of the unit;
when the load of the unit is reduced to 50-70% load stage, and the high exhaust pressure is less than 2.679MPa, the medium-pressure adjusting valve of the steam turbine can be adopted to participate in heat supply adjustment, and key components of an oil engine, an actuator, a steam distribution mechanism and the like of the medium-pressure adjusting valve of the steam turbine are replaced and modified, so that large moment generated by large front-back pressure difference of the valve in a pressure-holding adjusting mode is overcome, and meanwhile, the modified medium-pressure adjusting valve equipment is prevented from being damaged by equipment such as spring breakage and the like; the DEH function is upgraded and the heat supply is adjusted to be optimized, and the opening of the adjusting valve can be automatically adjusted within the range of 20-100% after being modified, so that the aim of changing the high exhaust pressure is fulfilled.
When the load of the unit is reduced to below 50%, the unit can be opened to 100% by adopting a middle regulating door, and the unit slowly exits from the high-pressure heater to operate, and high-pressure heat supply and steam supply are carried out by utilizing one-section steam extraction, so that the requirement of high-pressure heat supply parameters can be met.
Designing the composition of a system diagram:
an outlet pipeline is arranged at the back of the steam extraction check valve 8 and the front of the steam extraction electric door 11, a steam extraction pipe is connected to a high-pressure heat supply main pipe, the electric door 10, the steam valve B9 and the desuperheater 3 are arranged in the middle, and a manual door A2, a reverse steam valve 4, a manual door B5, a manual door C7 and a steam valve A6 are arranged at the same time, as shown in figure 1.
Claims (2)
1. A wide load flexibility heating operation device for a thermal power plant, comprising: high pressure cylinder, intermediate pressure cylinder, characterized by: the high-pressure cylinder pass through the female union coupling of liquid accuse butterfly valve, pneumatic governing valve on the pipeline and high pressure heat supply, the high-pressure cylinder be connected with steam-operated check valve, extraction check valve through the pipeline respectively, extraction check valve and extraction electric valve between take over to heating system, install electric valve, steam-operated check valve B, desuperheater on heating system's the pipeline in proper order, the desuperheater be connected with manual check valve A, contrary steam valve respectively, contrary steam valve be connected with manual check valve B, steam-operated check valve A, manual check valve C in proper order.
2. The wide load flexibility heating operation device for thermal power plant as claimed in claim 1, wherein: the steam extraction electric door is connected with the high-pressure heater through a pipeline, the intermediate pressure cylinder is connected with the low-pressure cylinder, and the manual door C is connected with the condensation water pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222939684.4U CN218780387U (en) | 2022-11-04 | 2022-11-04 | Wide-load flexible heat supply operation device for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222939684.4U CN218780387U (en) | 2022-11-04 | 2022-11-04 | Wide-load flexible heat supply operation device for thermal power plant |
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| Publication Number | Publication Date |
|---|---|
| CN218780387U true CN218780387U (en) | 2023-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222939684.4U Active CN218780387U (en) | 2022-11-04 | 2022-11-04 | Wide-load flexible heat supply operation device for thermal power plant |
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- 2022-11-04 CN CN202222939684.4U patent/CN218780387U/en active Active
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