CN111120104B - Gas and steam combined cycle system, synchronous washing method and device - Google Patents
Gas and steam combined cycle system, synchronous washing method and device Download PDFInfo
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- CN111120104B CN111120104B CN201911203617.2A CN201911203617A CN111120104B CN 111120104 B CN111120104 B CN 111120104B CN 201911203617 A CN201911203617 A CN 201911203617A CN 111120104 B CN111120104 B CN 111120104B
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- 238000005406 washing Methods 0.000 title claims abstract description 409
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 202
- 239000000428 dust Substances 0.000 claims abstract description 98
- 239000002918 waste heat Substances 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 143
- 239000002904 solvent Substances 0.000 claims description 63
- 239000003034 coal gas Substances 0.000 claims description 22
- 230000005684 electric field Effects 0.000 claims description 19
- 239000002956 ash Substances 0.000 claims description 9
- 230000008021 deposition Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000012716 precipitator Substances 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 7
- 239000010882 bottom ash Substances 0.000 claims description 6
- 239000002699 waste material Substances 0.000 abstract description 6
- 238000004939 coking Methods 0.000 description 8
- 238000001035 drying Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 239000012717 electrostatic precipitator Substances 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000012459 cleaning agent Substances 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000003599 detergent Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000004071 soot Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000005235 decoking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/705—Adding liquids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/48—Devices for removing water, salt, or sludge from boilers; Arrangements of cleaning apparatus in boilers; Combinations thereof with boilers
- F22B37/52—Washing-out devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/60—Fluid transfer
- F05D2260/607—Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention relates to the technical field of energy utilization, in particular to a gas-steam combined cycle system, a synchronous washing method and a device. Therefore, synchronous washing of the gas turbine, the waste heat boiler, the gas electric dust remover and the gas compressor is realized, the full utilization of energy is ensured, the waste of the energy is avoided, and the washing efficiency of the gas-steam combined cycle system is improved.
Description
Technical Field
The invention relates to the technical field of energy utilization, in particular to a gas and steam combined cycle system, a synchronous water washing method and a synchronous water washing device.
Background
In a combined gas and steam cycle system, the compressor of a gas turbine inevitably draws in air pollutants during operation. Over time, contaminants can deposit and clog compressor airflow passages. Therefore, the method not only can cause the output reduction of the compressor, the power reduction and the heat consumption increase of the gas turbine, but also can corrode the blades, further reduce the service life of the unit, and even cause the surge of the compressor when the unit is serious. In addition, the soot on the heating surface of the waste heat boiler also causes the exhaust gas temperature of the boiler to be increased and the steam yield to be reduced. Meanwhile, the dust accumulation of the dust collecting plate of the gas electric dust remover can cause the efficiency of the electric dust remover to be reduced. Meanwhile, the dust and scale deposition on the blades of the gas compressor can reduce the gas flow, thereby causing the output reduction of the gas compressor and the efficiency reduction of the unit.
Therefore, the gas turbine, the exhaust-heat boiler, the gas electric precipitator and the gas compressor in the gas-steam combined cycle system must be periodically subjected to a water washing operation. However, in the prior art, the water washing systems of the devices in the gas-steam combined cycle system are independent from each other and carry out water washing independently, so that the water washing time is inconsistent, energy cannot be fully utilized, and the technical problem of energy waste exists.
Disclosure of Invention
In view of the above, the present invention has been made to provide a combined gas and steam cycle system, a synchronous water washing method and apparatus that overcome or at least partially solve the above problems.
According to a first aspect of the invention, the invention provides a gas-steam combined cycle system, which comprises a gas turbine, a waste heat boiler, a gas electric dust remover, a gas compressor, a first water washing tank, a second water washing tank, a synchronous water washing pipe network, a turbine water washing nozzle, a boiler water washing nozzle, an electric dust remover water washing nozzle and a compressor water washing nozzle;
the synchronous washing pipe network comprises a first washing branch pipeline, a second washing branch pipeline, a third washing branch pipeline and a fourth washing branch pipeline;
the first water washing tank is connected with the turbine water washing nozzle through the first water washing branch pipeline, and the turbine water washing nozzle is arranged inside the gas turbine; the first water washing tank is connected with the boiler water washing nozzle through the second water washing branch pipeline, and the boiler water washing nozzle is arranged inside the waste heat boiler;
the second water washing tank is connected with the water washing nozzles of the electric dust collector through the third water washing branch pipeline, and the water washing nozzles of the electric dust collector are arranged inside the gas electric dust collector; the second water washing tank is connected with the compressor water washing nozzle through the fourth water washing branch pipeline, and the compressor water washing nozzle is arranged inside the gas compressor;
wherein a first washing solvent in the first washing tank is ejected through the turbine washing nozzle through the first washing branch line to wash the gas turbine; a first washing solvent in the first washing tank is sprayed out through the boiler washing nozzle through the second washing branch pipeline so as to wash the waste heat boiler; a second washing solvent in the second washing tank is sprayed out through the third washing branch pipeline through the washing nozzle of the electric dust remover so as to wash the gas electric dust remover; and a second washing solvent in the second washing tank is sprayed out through the fourth washing branch pipeline through the compressor washing nozzle so as to wash the gas compressor.
According to a second aspect of the present invention, there is provided a synchronous water washing method applied to the gas-steam combined cycle system according to the first aspect, the method comprising:
controlling the first washing solvent in the first washing tank to be sprayed out through the turbine washing nozzle through the first washing branch pipeline so as to wash the gas turbine;
simultaneously controlling the first washing solvent in the first washing tank to be sprayed out through the boiler washing nozzle through the second washing branch pipeline, and washing the waste heat boiler;
meanwhile, the second washing solvent in the second washing tank is controlled to be sprayed out through the third washing branch pipeline through the washing nozzle of the electric dust remover, and the gas electric dust remover is washed with water;
and simultaneously controlling the second washing solvent in the second washing tank to be sprayed out through the fourth washing branch pipeline through the compressor washing nozzle to wash the gas compressor.
Preferably, the controlling of the first washing solvent in the first washing tank to be ejected through the turbine washing nozzle via the first washing branch line to wash the gas turbine includes:
when the temperature between the gas turbine wheels is higher than 5 ℃ and not higher than 150 ℃, controlling the first washing solvent in the first washing tank to be sprayed out through the turbine washing nozzle through the first washing branch pipeline so as to wash the gas turbine;
wherein a temperature difference between a temperature of the first water-washing solvent and the gas turbine inter-wheel temperature is less than or equal to 65 ℃.
Preferably, the washing the exhaust-heat boiler includes:
and washing the boiler heating surface of the waste heat boiler from top to bottom.
Preferably, the gas electric dust remover is washed by water, and the method comprises the following steps:
and washing an inlet electric field dust deposition plate, an outlet electric field dust deposition plate, a bottom ash bucket and an ash bucket dust discharge pipe in the coal gas electric dust remover in sequence.
Preferably, the water washing of the gas compressor includes:
and washing the low-pressure gas compressor impeller and the high-pressure gas compressor impeller in the gas compressor in sequence.
Preferably, the method further comprises:
after the gas turbine, the waste heat boiler, the gas electric dust remover and the gas compressor are washed with water, the gas turbine is ignited and started, and the gas turbine, the waste heat boiler, the gas electric dust remover and the gas compressor are synchronously dried.
According to a third aspect of the present invention, there is provided a synchronous water washing device for use in the gas-steam combined cycle system according to the first aspect, the device comprising:
the first control module is used for controlling the first washing solvent in the first washing tank to be sprayed out through the turbine washing nozzle through the first washing branch pipeline so as to wash the gas turbine;
the second control module is used for simultaneously controlling the first washing solvent in the first washing tank to be sprayed out through the boiler washing nozzle through the second washing branch pipeline so as to wash the waste heat boiler;
the third control module is used for simultaneously controlling the second washing solvent in the second washing tank to be sprayed out through the third washing branch pipeline through the washing nozzle of the electric dust remover so as to wash the gas electric dust remover;
and the fourth control module is used for simultaneously controlling the second washing solvent in the second washing tank to be sprayed out through the fourth washing branch pipeline through the compressor washing nozzle so as to wash the gas compressor.
According to a fourth aspect of the present invention, there is provided a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the method steps as in the second aspect described above.
According to a fifth aspect of the present invention, there is provided a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method steps as in the second aspect when executing the program.
According to the gas-steam combined cycle system, the synchronous washing method and the device, the synchronous washing pipe network is arranged in the gas-steam combined cycle system and comprises a first washing branch pipeline, a second washing branch pipeline, a third washing branch pipeline and a fourth washing branch pipeline, the first washing solvent in the first washing tank is controlled to be sprayed out through the first washing branch pipeline and the turbine washing nozzle, the gas turbine is washed with water, the first washing solvent in the first washing tank is controlled to be sprayed out through the second washing branch pipeline and the boiler washing nozzle, the exhaust-heat boiler is washed with water, the second washing solvent in the second washing tank is controlled to be sprayed out through the third washing branch pipeline and the washing nozzle of the electric dust remover, the electric dust remover is washed with water, and the second washing solvent in the second washing tank is controlled to be sprayed out through the fourth washing branch pipeline and the compressor washing nozzle, and (5) washing the gas compressor with water. Therefore, synchronous washing of the gas turbine, the waste heat boiler, the gas electric dust remover and the gas compressor is realized, the full utilization of energy is ensured, the waste of the energy is avoided, and the washing efficiency of the gas-steam combined cycle system is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic view showing the construction of a gas-steam combined cycle system according to a first embodiment of the present invention;
FIG. 2 is a schematic view showing the construction of a combined gas and steam cycle system according to a specific example of the first embodiment of the present invention;
FIG. 3 is a flow chart showing a synchronous water washing method in a second embodiment of the present invention;
FIG. 4 is a schematic structural view showing a synchronous water washing apparatus according to a third embodiment of the present invention;
fig. 5 shows a block diagram of a computer apparatus in a fourth embodiment of the present invention.
Wherein, 1 is gas turbine, 2 is exhaust-heat boiler, 3 is the coal gas electrostatic precipitator, 4 is the coal gas compressor, 5 is first washing case, 6 is the second washing case, 7 is first washing branch pipeline, 8 is second washing branch pipeline, 9 is third washing branch pipeline, 10 is fourth washing branch pipeline, 11 is turbine washing nozzle, 12 is boiler washing nozzle, 13 is electrostatic precipitator washing nozzle, 14 is compressor washing nozzle.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may 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 disclosure to those skilled in the art.
The first embodiment of the invention provides a gas-steam combined cycle system, as shown in fig. 1, the system comprises a gas turbine 1, a waste heat boiler 2, a gas electric dust remover 3, a gas compressor 4, a first water washing tank 5, a second water washing tank 6, a synchronous water washing pipe network, a turbine water washing nozzle 11, a boiler water washing nozzle 12, an electric dust remover water washing nozzle 13 and a compressor water washing nozzle 14. The synchronous wash pipe network includes a first wash branch line 7, a second wash branch line 8, a third wash branch line 9, and a fourth wash branch line 10. The first water washing tank 5 is connected with a turbine water washing nozzle 11 through a first water washing branch pipeline 7, and the turbine water washing nozzle 11 is arranged inside the gas turbine 1; the first water washing tank 5 is connected to a boiler water washing nozzle 12 through a second water washing branch pipe 8, and the boiler water washing nozzle 12 is provided inside the exhaust-heat boiler 2. The second washing tank 6 is connected with a washing nozzle 13 of the electric dust collector through a third washing branch pipeline 9, and the washing nozzle 13 of the electric dust collector is arranged inside the gas electric dust collector 3; the second water washing tank 6 is connected to a compressor water washing nozzle 14 through a fourth water washing branch pipe 10, and the compressor water washing nozzle 14 is provided inside the gas compressor 4. The gas turbine 1 and the gas compressor 4 are coaxial.
Wherein, the first water washing solvent in the first water washing tank 5 is sprayed out through the first water washing branch pipeline 7 via the turbine water washing nozzle 11 to wash the gas turbine 1; the first washing solvent in the first washing tank 5 is sprayed out through the boiler washing nozzle 12 through the second washing branch pipeline 8 to wash the exhaust-heat boiler 2; a second washing solvent in the second washing tank 6 is sprayed out through a third washing branch pipeline 9 through a washing nozzle 13 of the electric dust remover so as to wash the gas electric dust remover 3; the second washing solvent in the second washing tank 6 is sprayed out through the fourth washing branch line 10 via the compressor washing nozzle 14 to wash the gas compressor 4 with water.
Further, as shown in fig. 2, the first water washing tank 5 may be provided around the gas turbine 1, and preferably, the first water washing tank 5 is provided at an inlet of a compressor of the gas turbine 1, so that a water washing line can be saved. The first water washing tank 5 contains a centrifugal water pump, an electric heater, a demineralized water tank, a detergent water tank, and an on-site control panel. The second water washing tank 6 can be arranged around the gas electric dust remover 3, so that the water washing pipeline can be saved. The second water washing tank 6 contains a washing water pump, an electric heater, a washing water tank, a detergent water tank, and an on-site control panel. The gas turbine 1 includes a compressor, a combustor, and a turbine. The waste heat boiler 2 comprises a boiler body, a condensed water heater and a chimney, and a boiler heating surface is arranged on the boiler body. The coal gas electric dust remover 3 comprises an inlet electric field dust deposition plate, an outlet electric field dust deposition plate, a bottom dust hopper and a dust hopper dust discharge pipe. The gas compressor 4 comprises a high-pressure gas machine and a low-pressure gas machine. The exhaust pressure of the high-pressure gas machine is 1-10MPa, and the exhaust pressure of the low-pressure gas machine is 0.3-1 MPa. The turbine washing nozzle 11 is arranged at the air inlet of the air compressor, and the boiler washing nozzle 12 is arranged in the tail flue of the waste heat boiler 2. The electric dust remover washing nozzle 13 is arranged in the electric field of the inlet and the outlet of the gas electric dust remover 3, and the compressor washing nozzle 14 is arranged in the compressors of the high-pressure gas machine and the low-pressure gas machine.
Therefore, the first washing solvent in the first washing tank 5 is sprayed out through the turbine washing nozzle 11 through the first washing branch pipeline 7 to wash the compressor and the turbine in the gas turbine 1, and various water-soluble substances, various oil and smoke sediments on the turbine blades of the compressor can be effectively removed, so that the pressure ratio and the flow rate of the compressor are recovered, and the output of the unit is improved. Meanwhile, when the heavy oil inferior fuel is combusted by the turbine, the heavy oil inferior fuel can be effectively cleaned, because the fuel contains more ash, trace metals and other impurities and has higher viscosity, dirt and deposits can be formed on turbine blades, high-temperature corrosion is generated, the performance of a unit is influenced, the service life of the unit is reduced, and under the condition, the performance of the unit can be recovered by washing with water. The first washing solvent in the first washing tank 5 is sprayed out through the boiler washing nozzle 12 through the second washing branch pipeline 8, and washing is performed on the boiler heating surface of the waste heat boiler 2 from top to bottom. And a second washing solvent in the second washing tank 6 is sprayed out through a third washing branch pipeline 9 and a washing nozzle 13 of the electric dust collector to sequentially wash an inlet electric field dust plate, an outlet electric field dust plate, a bottom dust hopper and a dust hopper dust discharge pipe in the gas electric dust collector 3. The second washing solvent in the second washing tank 6 is sprayed out through the fourth washing branch pipe 10 via the compressor washing nozzle 14, and sequentially washes the low-pressure gas compressor impeller and the high-pressure gas compressor impeller.
In addition, as shown in fig. 2, the gas and steam combined cycle system further comprises a coking coal dust remover and a mixer, wherein the coking coal dust remover and the mixer are sequentially arranged at the front end of the gas electric dust remover 3. Because the coking coal is rich in impurities, the coking coal gas is firstly subjected to dust removal, decoking and purification by the coking coal dust remover, the purified coking coal gas enters the mixer, the coking coal gas and the blast furnace gas are fully mixed in the mixer, then, the mixed gas enters the gas electric dust remover 3 and sequentially passes through the inlet electric field and the outlet electric field in the gas electric dust remover 3 so as to remove dust from the coking coal gas and the blast furnace gas in the mixed gas.
Based on the same inventive concept, a second embodiment of the present invention provides a synchronous water washing method, which is applied to the gas-steam combined cycle system as described in the first embodiment, and as shown in fig. 3, the method includes:
step 301: and controlling the first washing solvent in the first washing tank to be sprayed out through the first washing branch pipeline through the turbine washing nozzle so as to wash the gas turbine.
Step 302: and meanwhile, the first washing solvent in the first washing tank is controlled to be sprayed out through the boiler washing nozzle through the second washing branch pipeline, so that the waste heat boiler is washed.
Step 303: and meanwhile, a second washing solvent in the second washing tank is controlled to be sprayed out through a third washing branch pipeline through a washing nozzle of the electric dust remover, so that the coal gas electric dust remover is washed.
Step 304: and simultaneously controlling a second washing solvent in the second washing tank to be sprayed out through a fourth washing branch pipeline through a compressor washing nozzle to wash the gas compressor.
This application is when control carries out the washing to gas turbine, and control carries out the washing to exhaust-heat boiler to and control carries out the washing to coal gas electrostatic precipitator, and control carries out the washing to the coal gas compressor, has realized carrying out the washing to gas turbine, exhaust-heat boiler, coal gas electrostatic precipitator and coal gas compressor in step.
Specifically, for step 301, the gas turbine is first commanded to shutdown, the water wash isolation valves in the gas turbine are closed, and the gas turbine main control program issues an offline water wash command. And responding to the offline water washing instruction, rotating the gas turbine and starting the gas turbine water washing pump at the same time, so that the water and the cleaning agent in the first water washing tank are mixed to form a first water washing solvent. The first washing solvent is added with a cleaning agent, the cleaning agent can improve the effect of cleaning oily dirt, the first washing solvent also contains desalted water, and meanwhile, antifreezing agents such as methanol or alcohol and the like need to be added in winter. To improve the water washing effect, the first water washing solvent may be heated to 85 ℃ so that the detergent can be sufficiently dissolved in the first water washing solvent. Furthermore, a first washing solvent in the first washing tank is pressurized by a washing pump to be divided into two paths in a synchronous washing pipe network, and the two paths are respectively sprayed out through a first washing branch pipeline and a turbine washing nozzle to wash the gas turbine, and sprayed out through a boiler washing nozzle through a second washing branch pipeline to wash the waste heat boiler.
Before the gas turbine is operated, the gas turbine needs to be sufficiently cooled. Namely, the inter-turbine gas turbine temperature is controlled to be higher than 5 ℃ and not more than 150 ℃. Meanwhile, during water washing, the temperature difference between the temperature of the first water washing solvent and the temperature between the gas turbine wheels needs to be controlled to be lower than or equal to 65 ℃. Thus, thermal shock of the gas turbine is prevented. In addition, the washing needs to be carried out under the unit is dragged to high-speed barring state at the starter motor, and the washing process includes four stages, is respectively: a wetting phase, a cleaning phase, a rinsing phase and a drying phase. Wherein, the drying stage enables the liquid in the unit to be discharged. In order to remove the accumulated water, the water washing surface is dried, and the gas turbine is ignited and started to dry.
For step 302, the boiler heating surface at the tail part of the waste heat boiler is washed from top to bottom. As the boiler heating surface is seriously ash-deposited and corroded, the soot blowing effect is not obvious, and mixed alkaline water is needed, the mixed alkaline water is also added into the first water washing solvent. Simultaneously, boiler washing nozzle sets up at boiler afterbody flue top, and the washing flowing back receives the influence of gravity, and downstream to boiler bottom from the top down washes, can comply with the washing flowing direction of flowing back, improves water washing efficiency. In addition, the furnace wall adopts a common boiler steel plate, and the discharged water after washing contains extremely corrosive H2S04And the flue damage can be accelerated by water washing, so that accumulated water needs to be drained in time after the waste heat boiler is washed with water. Therefore, the exhaust-heat boiler needs to be dried synchronously with the gas turbine.
For step 303, under the effect of the offline washing instruction sent by the gas turbine main control program, the gas electric precipitator and the gas compressor are washed with the gas turbine and the exhaust-heat boiler synchronously, the offline washing instruction is responded, the washing pump of the second washing tank is started, the second washing solvent in the second washing tank is pressurized by the washing pump to be divided into two paths in the synchronous washing pipe network, and the two paths are respectively passed through the third washing branch pipeline flowing into the gas electric precipitator and flowing into the gas compressor through the fourth washing branch pipeline. And after the second washing solvent flows into the coal gas electric dust remover, washing an inlet electric field dust plate, an outlet electric field dust plate, a bottom dust hopper and a dust hopper dust discharge pipe in the coal gas electric dust remover in sequence. This application is through importing earlier electric field laying dust board washing, exports electric field laying dust board washing again, can make washing process unanimous with the flow direction of coal gas at the electric precipitation, guarantees the washing effect. Then, to bottom ash bucket washing, the reason is that the electrostatic precipitator washing nozzle is placed in the exit electric field top in, and the washing flowing back is influenced by gravity, following current to bottom ash bucket, ash bucket end-to-end connection dust exhaust pipeline, exit electric field washing flowing back dirt contains impurity and flows to the ash bucket, and the inclined plane of ash bucket can deposit impurity, must carry out bottom ash bucket washing this moment, washes away the deposit, and then contains deposit flowing back and get into ash bucket dust exhaust pipe, for preventing the dust exhaust pipe jam, sets up ash bucket dust exhaust pipe washing this moment, improves washing efficiency. The gas electric dust remover is required to drain accumulated water after being washed by water, and is synchronously dried with the gas turbine in order to avoid metal corrosion.
For step 304, after the second water-washing solvent flows into the gas compressor, the low-pressure gas compressor impeller and the high-pressure gas compressor impeller in the gas compressor are sequentially washed with water. This application is through earlier rinsing low pressure coal gas compressor impeller, washes high pressure coal gas compressor impeller again, can make the washing process unanimous with the flow direction of coal gas at the coal gas compressor. Because the compressor washing nozzle is arranged at the top of the inner cylinder of the gas compressor, the washing liquid sequentially washes the low-pressure and high-pressure gas compressor impellers according to the gas flow, and the washing efficiency is improved. After washing, each impeller is wet and has large moisture, and in order to prevent the gas compressor rotor and the impeller from rusting, the gas turbine needs to be synchronously started to dry the parts of the gas compressor rotor, the impeller and the like. Because the gas compressor is coaxial with the gas turbine, the gas compressor can synchronously rotate at an increased speed when the gas turbine is started, thereby drying the gas compressor while drying the gas turbine.
In order to avoid corrosion of the devices in the gas-steam combined cycle system after water washing, in the present application, the method further comprises:
after the gas turbine, the waste heat boiler, the gas electric precipitator and the gas compressor are washed with water, the gas turbine is ignited and started, and the gas turbine, the waste heat boiler, the gas electric precipitator and the gas compressor are synchronously dried.
Specifically, if the gas turbine, the exhaust-heat boiler, the gas electric precipitator and the gas compressor are respectively dried, the gas turbine needs to be started for drying the exhaust-heat boiler, the gas electric precipitator and the gas compressor, and therefore the problem of energy waste exists. Therefore, in the application, the gas turbine, the waste heat boiler, the gas electric dust remover and the gas compressor are simultaneously dried by starting the primary gas turbine, so that the energy is saved, and the working efficiency of the combined cycle is improved. Specifically, the gas turbine is ignited to realize synchronous drying of the gas turbine, the waste heat boiler, the gas electric dust remover and the gas compressor.
It should be noted that the low-heat value gas and steam combined cycle system is particularly suitable for the low-heat value gas and steam combined cycle system, because the fuel in the low-heat value gas and steam combined cycle system is a byproduct of steel smelting, the impurities are more, the water washing is more frequent, and the energy waste is great. Therefore, the waste of energy is particularly serious.
Based on the same inventive concept, a third embodiment of the present invention provides a synchronous water washing device, as shown in fig. 4, applied to the gas-steam combined cycle system according to the first embodiment, the device comprising:
a first control module 401, configured to control the first washing solvent in the first washing tank to be sprayed out through the turbine washing nozzle via the first washing branch line, so as to wash the gas turbine;
a second control module 402, configured to simultaneously control the first washing solvent in the first washing tank to be sprayed out through the boiler washing nozzle via the second washing branch pipeline, so as to wash the exhaust-heat boiler;
the third control module 403 is configured to simultaneously control the second washing solvent in the second washing tank to be sprayed out through the third washing branch pipeline via the washing nozzle of the electric dust remover, so as to wash the gas electric dust remover;
and a fourth control module 404, configured to simultaneously control the second washing solvent in the second washing tank to be sprayed out through the compressor washing nozzle via the fourth washing branch pipeline, so as to wash the gas compressor.
The first control module 401 is specifically configured to:
when the temperature between the gas turbine wheels is higher than 5 ℃ and not higher than 150 ℃, controlling the first washing solvent in the first washing tank to be sprayed out through the turbine washing nozzle through the first washing branch pipeline so as to wash the gas turbine;
wherein a temperature difference between a temperature of the first water-washing solvent and the gas turbine inter-wheel temperature is less than or equal to 65 ℃.
The second control module 402 is specifically configured to:
and washing the boiler heating surface of the waste heat boiler from top to bottom.
The third control module 403 is specifically configured to:
and washing an inlet electric field dust deposition plate, an outlet electric field dust deposition plate, a bottom ash bucket and an ash bucket dust discharge pipe in the coal gas electric dust remover in sequence.
The fourth control module 404 is specifically configured to:
and washing the low-pressure gas compressor impeller and the high-pressure gas compressor impeller in the gas compressor in sequence.
Wherein the apparatus further comprises:
and the drying module is used for igniting and starting the gas turbine after the gas turbine, the waste heat boiler, the gas electric dust remover and the gas compressor are washed by water, and synchronously drying the gas turbine, the waste heat boiler, the gas electric dust remover and the gas compressor.
Based on the same inventive concept, a fourth embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the method steps of the aforementioned second embodiment.
Based on the same inventive concept, a fifth embodiment of the present invention further provides a computer apparatus, as shown in fig. 5, for convenience of description, only the parts related to the embodiment of the present invention are shown, and details of the specific technology are not disclosed, please refer to the method part of the embodiment of the present invention. The computer device may be any terminal device including a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), a vehicle-mounted computer, etc., taking the computer device as the mobile phone as an example:
fig. 5 is a block diagram illustrating a partial structure associated with a computer device provided by an embodiment of the present invention. Referring to fig. 5, the computer apparatus includes: a memory 501 and a processor 502. Those skilled in the art will appreciate that the computer device configuration illustrated in FIG. 5 does not constitute a limitation of computer devices, and may include more or fewer components than those illustrated, or some components may be combined, or a different arrangement of components.
The following describes the components of the computer device in detail with reference to fig. 5:
the memory 501 may be used to store software programs and modules, and the processor 502 executes various functional applications and data processing by operating the software programs and modules stored in the memory 501. The memory 501 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.), and the like. Further, the memory 501 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 502 is a control center of the computer device, and performs various functions and processes data by operating or executing software programs and/or modules stored in the memory 501 and calling data stored in the memory 501. Alternatively, processor 502 may include one or more processing units; preferably, the processor 502 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications.
In this embodiment of the present invention, the processor 502 included in the computer device may have the functions corresponding to any of the method steps in the foregoing second embodiment.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual machine, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. Moreover, the present invention is not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the invention may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functionality of some or all of the components in accordance with embodiments of the present invention. The present invention may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present invention may be stored on computer-readable media or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
Claims (10)
1. A gas-steam combined cycle system is characterized by comprising a gas turbine, a waste heat boiler, a gas electric dust remover, a gas compressor, a first water washing tank, a second water washing tank, a synchronous water washing pipe network, a turbine water washing nozzle, a boiler water washing nozzle, an electric dust remover water washing nozzle and a compressor water washing nozzle;
the synchronous washing pipe network comprises a first washing branch pipeline, a second washing branch pipeline, a third washing branch pipeline and a fourth washing branch pipeline;
the first water washing tank is connected with the turbine water washing nozzle through the first water washing branch pipeline, and the turbine water washing nozzle is arranged inside the gas turbine; the first water washing tank is connected with the boiler water washing nozzle through the second water washing branch pipeline, and the boiler water washing nozzle is arranged inside the waste heat boiler;
the second water washing tank is connected with the water washing nozzles of the electric dust collector through the third water washing branch pipeline, and the water washing nozzles of the electric dust collector are arranged inside the gas electric dust collector; the second water washing tank is connected with the compressor water washing nozzle through the fourth water washing branch pipeline, and the compressor water washing nozzle is arranged inside the gas compressor;
wherein a first washing solvent in the first washing tank is ejected through the turbine washing nozzle through the first washing branch line to wash the gas turbine; a first washing solvent in the first washing tank is sprayed out through the boiler washing nozzle through the second washing branch pipeline so as to wash the waste heat boiler; a second washing solvent in the second washing tank is sprayed out through the third washing branch pipeline through the washing nozzle of the electric dust remover so as to wash the gas electric dust remover; and a second washing solvent in the second washing tank is sprayed out through the fourth washing branch pipeline through the compressor washing nozzle so as to wash the gas compressor.
2. A synchronous water washing method applied to the gas-steam combined cycle system of claim 1, the method comprising:
controlling the first washing solvent in the first washing tank to be sprayed out through the turbine washing nozzle through the first washing branch pipeline so as to wash the gas turbine;
simultaneously controlling the first washing solvent in the first washing tank to be sprayed out through the boiler washing nozzle through the second washing branch pipeline, and washing the waste heat boiler;
meanwhile, the second washing solvent in the second washing tank is controlled to be sprayed out through the third washing branch pipeline through the washing nozzle of the electric dust remover, and the gas electric dust remover is washed with water;
and simultaneously controlling the second washing solvent in the second washing tank to be sprayed out through the fourth washing branch pipeline through the compressor washing nozzle to wash the gas compressor.
3. The method of claim 2, wherein said controlling said first wash solvent in said first wash tank to be ejected through said turbine wash nozzle via said first wash branch line to wash said gas turbine comprises:
when the temperature between the gas turbine wheels is higher than 5 ℃ and not higher than 150 ℃, controlling the first washing solvent in the first washing tank to be sprayed out through the turbine washing nozzle through the first washing branch pipeline so as to wash the gas turbine;
wherein a temperature difference between a temperature of the first water-washing solvent and the gas turbine inter-wheel temperature is less than or equal to 65 ℃.
4. The method according to claim 2, wherein the washing the waste heat boiler with water comprises:
and washing the boiler heating surface of the waste heat boiler from top to bottom.
5. The method of claim 2, wherein the water washing the gas electric precipitator comprises:
and washing an inlet electric field dust deposition plate, an outlet electric field dust deposition plate, a bottom ash bucket and an ash bucket dust discharge pipe in the coal gas electric dust remover in sequence.
6. The method of claim 2, wherein said water washing said gas compressor comprises:
and washing the low-pressure gas compressor impeller and the high-pressure gas compressor impeller in the gas compressor in sequence.
7. The method of claim 2, wherein the method further comprises:
after the gas turbine, the waste heat boiler, the gas electric dust remover and the gas compressor are washed with water, the gas turbine is ignited and started, and the gas turbine, the waste heat boiler, the gas electric dust remover and the gas compressor are synchronously dried.
8. A synchronous water washing apparatus applied to the gas-steam combined cycle system of claim 1, the apparatus comprising:
the first control module is used for controlling the first washing solvent in the first washing tank to be sprayed out through the turbine washing nozzle through the first washing branch pipeline so as to wash the gas turbine;
the second control module is used for simultaneously controlling the first washing solvent in the first washing tank to be sprayed out through the boiler washing nozzle through the second washing branch pipeline so as to wash the waste heat boiler;
the third control module is used for simultaneously controlling the second washing solvent in the second washing tank to be sprayed out through the third washing branch pipeline through the washing nozzle of the electric dust remover so as to wash the gas electric dust remover;
and the fourth control module is used for simultaneously controlling the second washing solvent in the second washing tank to be sprayed out through the fourth washing branch pipeline through the compressor washing nozzle so as to wash the gas compressor.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 2 to 7.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 2-7 when executing the program.
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