CN114046494B - Communication system and standby method for industrial steam extraction - Google Patents
Communication system and standby method for industrial steam extraction Download PDFInfo
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- CN114046494B CN114046494B CN202111112059.6A CN202111112059A CN114046494B CN 114046494 B CN114046494 B CN 114046494B CN 202111112059 A CN202111112059 A CN 202111112059A CN 114046494 B CN114046494 B CN 114046494B
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- 238000000605 extraction Methods 0.000 title claims abstract description 209
- 238000000034 method Methods 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000009467 reduction Effects 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims description 31
- 238000000926 separation method Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 10
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
- F22D1/325—Schematic arrangements or control devices therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G5/00—Controlling superheat temperature
- F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Fluid Pressure (AREA)
- Cleaning By Liquid Or Steam (AREA)
Abstract
The invention discloses a communication system and a standby method for industrial steam extraction, comprising a primary steam extraction, a first high-pressure heater, an industrial steam extraction valve group, a fourth machine water supply main pipe, a temperature reduction valve group, a desuperheater and a safety valve; the primary steam extraction is connected with a first high-pressure heater, the output end of the primary steam extraction connection is connected with the input end of an industrial steam extraction valve group, the industrial steam extraction valve group is connected with a desuperheater, and the output end of a fourth water supply mother pipe is connected with the desuperheater through a temperature reduction valve group. According to the invention, after the unit trips, the extraction parallel connection can be realized through the fourth unit of the communication system, so that the continuity of industrial extraction and the stability of parameters are ensured, and the stable operation of a power plant is ensured; the industrial steam extraction self-supply can be realized through the first and second pumps of the fourth unit and the fifth industrial steam extraction pipeline, so that the environment-friendly parameters in the running process of the unit are ensured to reach the standards, and the loss of electric quantity and the economic assessment of a power grid are avoided.
Description
Technical Field
The invention relates to the technical field of thermal power coal-fired units, in particular to a communication system and a standby method for industrial steam extraction.
Background
The industrial extraction steam is an important benefit part of the thermal power plant, utilizes the steam which is acted by the steam turbine to meet certain parameters of users, reduces the cold source loss of the coal-fired unit, improves the circulating heat efficiency of the unit, reduces the coal consumption, saves the power supply cost, and gains additional benefit through the supply of the steam source; at present, most ammonia gas for denitration of a thermal power plant is formed by industrial steam extraction and urea hydrolysis, so that stability of industrial steam extraction parameters and flow determines whether a unit can reach the national ultra-low emission standard.
At present, most of power grids often have unit single-machine operation conditions, if the unit operation is stopped under abnormal conditions, the risk of losing industrial steam extraction is faced, the unit industrial steam extraction and the unit are connected for standby, and the selection of the pressure level of a proper connection steam source is one of the technical problems faced by the current thermal power plants.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides an industrial steam extraction communication system and a standby method.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a communication system for industrial extraction of steam, comprising:
the system comprises a first-stage steam extraction, a first high-pressure heater, an industrial steam extraction valve group, a fourth machine water supply main pipe, a temperature reduction valve group, a temperature reducer and a safety valve;
the first-stage steam extraction is connected with a first high-pressure heater, the output end of the first-stage steam extraction connection is connected with the input end of an industrial steam extraction valve group, the industrial steam extraction valve group is connected with a desuperheater, the output end of a fourth water supply pipe is connected with the desuperheater through a temperature reduction valve group, a safety valve is arranged on a rear pipeline of the desuperheater to ensure equipment and pipeline safety, the desuperheater is simultaneously connected with a drainage valve group, and the drainage valve group can fully drain and warm the water pipe before operation;
the desuperheater is also connected to the manual doors of the fourth to fifth industrial steam extraction pipelines, the manual doors of the fourth to fifth industrial steam extraction pipelines are connected with the electric doors of the fifth to steam separation cylinders and the unit denitration steam supply device, and the unit denitration steam supply device can provide denitration steam for the unit; the output end of the fifth machine to the steam-extraction steam-separation cylinder electric door is connected with an industrial steam-extraction steam-separation cylinder, and the output end of the industrial steam-extraction steam-separation cylinder is connected with the input end of an industrial steam-extraction user steam supply device.
Preferably, the communication system of the industrial steam extraction further comprises a second-stage steam extraction and a fifth industrial steam extraction;
the pipeline door of the fifth industrial steam extraction is connected with the fifth industrial steam extraction electric door, then is integrated into a fifth industrial steam extraction pipeline, and is connected with the fifth industrial steam extraction to steam separation cylinder electric door through the fifth industrial steam extraction pipeline;
the secondary steam extraction is connected with a second high-pressure heater, the secondary steam extraction is connected with a secondary extraction industrial steam extraction valve group, the secondary extraction industrial steam extraction valve is simultaneously connected with the safety valve, the secondary extraction industrial steam extraction valve group is simultaneously connected with a drainage valve group, and the secondary extraction industrial steam extraction valve group is connected with a fourth-fifth industrial steam extraction pipeline manual door.
Preferably, the one-extraction industrial steam extraction valve group comprises an electric door, an adjusting door and front and back manual doors of the electric door; the temperature reducing valve group comprises an adjusting door, a manual door in front of the adjusting door, a check door behind the adjusting door and a manual door, and is convenient for carrying out high-efficiency and rapid adjustment on an industrial steam extraction valve and a temperature reducing valve.
Preferably, the safety valve arranged on the rear pipeline of the desuperheater is an empty safety valve, and safety of equipment and pipelines can be ensured through the empty safety valve.
Preferably, the pipelines from the first-stage steam extraction and the second-stage steam extraction to the fifth industrial steam extraction are provided with a drain valve group, and water and heating pipes can be fully conveyed before operation.
Preferably, the air relief valve comprises a valve body, an air inlet channel is formed in the bottom of the valve body, a valve seat is fixedly arranged at the top of the air inlet channel, an exhaust pipe is formed in the side face of the valve body, a valve cover is fixedly arranged at the top of the valve body through a flange and a screw, an upper spring disc is fixedly arranged at the top of the inner side of the valve cover, a pressure spring is fixedly arranged at the bottom of the upper spring disc, a lower spring disc is fixedly arranged at the bottom of the pressure spring, a valve rod is movably sleeved at the inner side of the upper spring disc, the valve rod is fixedly sleeved with the lower spring disc, and a cleaning mechanism is arranged at the bottom end of the valve rod.
Preferably, the cleaning mechanism comprises a cleaning disc, a pneumatic blade and a rotating rod, wherein the rotating rod is fixedly sleeved at the bottom of the valve rod, a rotating bearing is installed at the joint of the rotating rod and the valve rod, the pneumatic blade is fixedly installed on the side wall of the surface of the rotating rod, the cleaning disc is fixedly sleeved with the rotating rod, a fixing box is fixedly installed on the inner side of the cleaning disc, a telescopic spring is fixedly installed on one side, close to the rotating rod, of the fixing box, and a cleaning rod is fixedly installed on the other end of the telescopic spring.
A standby method of industrial steam extraction, comprising the steps of:
the fourth machine to the fifth industrial steam extraction pipeline door are kept fully open during the hot standby, an electric door, an adjusting door and a temperature reducing water adjusting door in the first extraction industrial steam extraction valve group are kept closed, a water supply main pipe of the fourth machine is kept open to the first extraction temperature reducing valve group, other manual doors are kept open, a drain door is properly opened, and the electric door and the adjusting door are interlocked at the input position;
after receiving a command of stopping the operation of the fifth industrial steam extraction, immediately stopping the operation of the first high-pressure heater and the second high-pressure heater, closing steam inlet electric doors of the first high-pressure heater and the second high-pressure heater, and after stopping the operation of the high-pressure heater, opening electric doors and regulating doors in the two-extraction industrial steam extraction valve group, and putting into the two-extraction industrial steam extraction;
and opening an electric door and an adjusting door in a fourth machine one-extraction industrial steam extraction valve group, and feeding a water mother pipe to the one-extraction temperature-reduction valve group by the fourth machine to extract industrial steam.
Preferably, the temperature of the industrial steam extraction main pipe is kept at 240-300 ℃, and the pressure of the industrial steam extraction main pipe is not more than 0.85-0.9MPa.
Compared with the prior art, the invention has the beneficial effects that:
1. the safety of equipment and pipelines can be ensured through the safety valve arranged on the rear pipeline of the desuperheater; the drainage valve group connected with the desuperheater can fully drain water and warm pipes before operation, so that the safety of equipment is ensured; the safety of equipment and pipelines can be ensured by arranging an empty safety valve on the rear pipeline of the desuperheater;
2. when the pressure of the pipeline behind the desuperheater exceeds the limit set by the safety valve, the gas in the air inlet channel pushes the valve clack to move upwards and compress the pressure spring, after the valve clack is jacked by the gas, the air inlet channel and the inside of the exhaust pipe are in a flowing state, the rotating rod is driven to rotate through the rotation of the pneumatic blade, meanwhile, the cleaning disc is driven to rotate, the cleaning rod stretches out in the direction away from the rotating rod under the influence of the rotating centrifugal force, the top of the valve seat is rubbed, the top of the valve seat can be cleaned, impurities attached to the top of the valve seat in the gas can be removed, the tightness of the air safety valve is ensured, and the stability and the safety of the whole pipeline system are improved;
when the air pressure in the pipeline is restored to the normal level, the valve clack is pushed to be restored to the closed state under the action of the pressure spring, the rotating rod stops rotating, the cleaning rod is retracted to the original position under the action of the restoring force of the telescopic spring, no additional driving force is needed, the cleaning and automatic resetting effects are achieved by utilizing the pressure of the air, the energy is saved, and the safe operation of the system is ensured.
3. After the unit trips, because the pressure level of the fourth unit is different, the fourth unit can be utilized to realize steam extraction parallel connection through the communication system, thereby ensuring the continuity of industrial steam extraction and the stability of parameters and ensuring the stable operation of the power plant.
4. Compared with the prior power plant which loses more than half an hour of industrial steam extraction once, if the power plant is operated, nitrogen oxides exceed standard, the average value of the nitrogen oxides exceeds a certain limit, the power plant is forced to be stopped in an unscheduled manner, and serious assessment of a power grid is caused.
Drawings
FIG. 1 is a schematic diagram of a standby method for industrial steam extraction according to the present invention;
FIG. 2 is a schematic diagram of an industrial steam extraction communication system according to the present invention;
FIG. 3 is a schematic diagram of the overall structure of an air relief valve of an industrial steam extraction communication system according to the present invention;
FIG. 4 is a schematic diagram of a cleaning mechanism transmission mechanism of an empty safety valve of a communication system for industrial steam extraction according to the present invention;
fig. 5 is a schematic structural diagram of a cleaning mechanism of an air relief valve of a communication system for industrial steam extraction according to the present invention.
In the figure: 1. a valve body; 2. a valve cover; 3. an air intake passage; 4. an exhaust pipe; 5. a valve seat; 6. A spring plate is arranged; 7. a valve stem; 8. a pressure spring; 9. a valve flap; 10. a cleaning mechanism; 11. a lower spring plate; 12. pneumatic blades; 13. a cleaning plate; 14. a fixed box; 15. a telescopic spring; 16. A cleaning rod; 17. and rotating the rod.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Referring to fig. 1-5, an industrial extraction liaison system, comprising:
the system comprises a first-stage steam extraction, a first high-pressure heater, an industrial steam extraction valve group, a fourth machine water supply main pipe, a temperature reduction valve group, a temperature reducer and a safety valve;
the first-stage steam extraction is connected with a first high-pressure heater, the output end of the first-stage steam extraction connection is connected with the input end of an industrial steam extraction valve group, the industrial steam extraction valve group is connected with a desuperheater, the output end of a fourth water supply main pipe is connected with the desuperheater through a desuperheater valve group, a safety valve is arranged on a rear pipeline of the desuperheater to ensure the safety of equipment and pipelines, the desuperheater is simultaneously connected with a drainage valve group, and the drainage valve group can sufficiently drain and warm the pipeline before operation;
the desuperheater is also connected to the manual doors of the fourth to fifth industrial steam extraction pipelines, the manual doors of the fourth to fifth industrial steam extraction pipelines are connected with the electric doors of the fifth to steam separation cylinders and the unit denitration steam supply device, and the unit denitration steam supply device can provide denitration steam for the unit; the output end of the fifth machine to the steam-extraction cylinder electric door is connected with an industrial steam-extraction cylinder, and the output end of the industrial steam-extraction cylinder is connected with the input end of an industrial steam-extraction user steam supply device.
As shown in fig. 2, an industrial extraction communication system further includes a second stage extraction and a fifth industrial extraction;
the pipeline door of the fifth industrial steam extraction is connected with the electric door of the fifth industrial steam extraction, then is integrated into the pipeline of the fifth industrial steam extraction, and is connected with the electric door of the fifth industrial steam extraction to the steam separation cylinder through the pipeline of the fifth industrial steam extraction;
the second-stage steam extraction and second-stage steam extraction are connected with a second high-pressure heater, the second-stage steam extraction is connected with a second-stage industrial steam extraction valve set, the second-stage industrial steam extraction valve set is simultaneously connected with a safety valve, the second-stage industrial steam extraction valve set is simultaneously connected with a drainage valve set, and the second-stage industrial steam extraction valve set is connected with a manual door of a fourth-fifth industrial steam extraction pipeline.
As shown in fig. 2, the industrial extraction valve group comprises an electric door, an adjusting door and front and back manual doors of the electric door; the temperature reducing valve group comprises an adjusting door, a manual door in front of the adjusting door, a check door behind the adjusting door and a manual door, and is convenient for carrying out high-efficiency and rapid adjustment on an industrial steam extraction valve and a temperature reducing valve.
As shown in fig. 2, the safety valve arranged on the rear pipeline of the desuperheater is an empty safety valve, and the safety of equipment and pipelines can be ensured through the empty safety valve.
As shown in fig. 2, the pipelines from the first-stage steam extraction and the second-stage steam extraction to the fifth industrial steam extraction are provided with a drain valve group, and the pipeline can be fully used for water and heating before operation.
As shown in fig. 3, an air inlet channel 3 is formed in the bottom of a valve body 1 of an air safety valve, a valve seat 5 is fixedly mounted at the top of the air inlet channel 3, an exhaust pipe 4 is formed in the side face of the valve body 1, a valve cover 2 is fixedly mounted at the top of the valve body 1 through a flange and a screw, an upper spring disc 6 is fixedly mounted at the top of the inner side of the valve cover 2, a pressure spring 8 is fixedly mounted at the bottom of the upper spring disc 6, a lower spring disc 11 is fixedly mounted at the bottom of the pressure spring 8, a valve rod 7 is movably sleeved at the inner side of the upper spring disc 6, the valve rod 7 is fixedly sleeved with the lower spring disc 11, and a cleaning mechanism 10 is mounted at the bottom end of the valve rod 7.
As shown in fig. 4-5, the cleaning mechanism 10 comprises a cleaning disc 13 and a gas-moving blade 12, the valve rod 7 is fixedly arranged on the surface side wall of the valve rod 7, the cleaning disc 13 is fixedly sleeved with the valve rod 7, a fixed box 14 is fixedly arranged on the inner side of the cleaning disc 13, a telescopic spring 15 is fixedly arranged on one side, close to the valve rod 7, of the inner side of the fixed box 14, and a cleaning rod 16 is fixedly arranged at the other end of the telescopic spring 15.
Referring to fig. 1, a standby method for industrial steam extraction comprises the following steps:
s1: the fourth machine to the fifth industrial steam extraction pipeline door are kept fully opened during the hot standby period, an electric door, an adjusting door and a temperature reducing water adjusting door in the first extraction industrial steam extraction valve group are kept closed from the electric door, the adjusting door and the fourth machine water supply main pipe to the first extraction temperature reducing valve group in the second extraction industrial steam extraction valve group, other manual doors are kept open, the drain door is properly opened, and the electric door and the adjusting door are interlocked at the input position;
s2: after receiving a command that the fifth industrial steam extraction is stopped and the fourth industrial steam extraction is immediately put into operation, immediately stopping the operation of the first high-pressure heater and the second high-pressure heater, closing steam inlet electric doors of the first high-pressure heater and the second high-pressure heater, opening electric doors and adjusting doors in a two-extraction industrial steam extraction valve group after the high-pressure heater is stopped, and putting into two-extraction industrial steam extraction;
s3: and opening an electric door and an adjusting door in a fourth machine one-extraction industrial steam extraction valve group, and feeding a water mother pipe to the one-extraction temperature-reduction valve group by the fourth machine to extract industrial steam.
The temperature of the industrial steam extraction main pipe is kept at 240-300 ℃, and the pressure of the industrial steam extraction main pipe is not more than 0.85-0.9MPa.
In the invention, the industrial extraction valve group comprises an electric door, an adjusting door and front and back manual doors of the electric door; the temperature reducing valve group comprises an adjusting door, a manual door in front of the adjusting door, a back check door of the adjusting door and the manual door, so that an industrial extraction valve and a temperature reducing valve can be conveniently and efficiently and quickly adjusted, the safety of equipment and the pipelines can be ensured by an empty safety valve arranged on a back pipeline of the temperature reducer, and the hydrophobic valve group of the pipelines from the primary extraction steam and the secondary extraction steam to the fifth industrial extraction steam can play roles of fully conveying water and heating pipes before operation and ensuring the safety of the equipment;
when the pressure of the pipeline behind the desuperheater exceeds the limit set for the air relief valve, the gas in the air inlet channel 3 pushes the valve clack 9 to move upwards and compresses the pressure spring 8, after the valve clack 9 is jacked by the gas, the air inlet channel 3 and the inside of the exhaust pipe 4 are in a flowing state, the rotating rod 17 is driven to rotate through the rotation of the pneumatic blade 12, meanwhile, the cleaning disc 13 is driven to rotate, the cleaning rod 16 stretches out in the direction away from the rotating rod 17 under the influence of the rotating centrifugal force, the top of the valve seat 5 is rubbed, the top of the valve seat 5 can be cleaned, impurities attached to the top of the valve seat 5 in the gas can be removed, the tightness of the air relief valve is ensured, and the stability and the safety of the whole pipeline system are improved;
when the air pressure in the pipeline returns to the normal level, the valve clack 9 is pushed to return to a closed state under the action of the pressure spring 8, the rotating rod 17 stops rotating, the cleaning rod 16 retracts to the original position under the action of the restoring force of the telescopic spring 15, no additional driving force is needed, the cleaning and automatic resetting effects are achieved by utilizing the pressure of the air, the energy is saved, and the safe operation of the system is ensured;
the fourth machine to the fifth industrial steam extraction pipeline door are kept fully opened during the hot standby period, an electric door, an adjusting door and a temperature reducing water adjusting door in the first extraction industrial steam extraction valve group are kept closed from the electric door, the adjusting door and the fourth machine water supply main pipe to the first extraction temperature reducing valve group in the second extraction industrial steam extraction valve group, other manual doors are kept open, the drain door is properly opened, and the electric door and the adjusting door are interlocked at the input position;
after receiving a command that the fifth industrial steam extraction is stopped and the fourth industrial steam extraction is immediately put into operation, immediately stopping the operation of the first high-pressure heater and the second high-pressure heater, closing steam inlet electric doors of the first high-pressure heater and the second high-pressure heater, and after the high-pressure heater is stopped, rapidly opening electric doors and regulating doors in a two-extraction industrial steam extraction valve group, and putting into two-extraction industrial steam extraction;
opening an electric door and an adjusting door in a fourth machine one-extraction industrial steam extraction valve group, feeding a water main pipe to the one-extraction temperature-reduction valve group by the fourth machine, and putting into one-extraction industrial steam extraction;
after the unit trips, the fourth unit can realize steam extraction parallel connection through the communication system, thereby ensuring the continuity of industrial steam extraction and the stability of parameters and ensuring the stable operation of the power plant; meanwhile, industrial steam extraction self-supply can be realized through the first and second pumps of the fourth unit and the fifth industrial steam extraction pipeline, so that environment-friendly parameters in the running process of the unit are ensured to reach standards, and electric quantity loss and economic assessment of a power grid are avoided.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (3)
1. A communication system for industrial extraction of steam, comprising:
the system comprises a first-stage steam extraction, a first high-pressure heater, an industrial steam extraction valve group, a fourth machine water supply main pipe, a temperature reduction valve group, a temperature reducer and a safety valve;
the first-stage steam extraction is connected with a first high-pressure heater, the output end of the first-stage steam extraction connection is connected with the input end of an industrial steam extraction valve group, the industrial steam extraction valve group is connected with a desuperheater, the output end of a fourth water supply pipe is connected with the desuperheater through a temperature reduction valve group, a safety valve is arranged on a rear pipeline of the desuperheater to ensure equipment and pipeline safety, the desuperheater is simultaneously connected with a drainage valve group, and the drainage valve group can fully drain and warm the water pipe before operation;
the desuperheater is also connected to the manual doors of the fourth to fifth industrial steam extraction pipelines, the manual doors of the fourth to fifth industrial steam extraction pipelines are connected with the electric doors of the fifth to steam separation cylinders and the unit denitration steam supply device, and the unit denitration steam supply device can provide denitration steam for the unit; the output end of the fifth machine to the steam-extraction steam-separation cylinder electric door is connected with an industrial steam-extraction steam-separation cylinder, and the output end of the industrial steam-extraction steam-separation cylinder is connected with the input end of an industrial steam-extraction user steam supply device;
the industrial steam extraction communication system further comprises a second-stage steam extraction and a fifth industrial steam extraction;
the pipeline door of the fifth industrial steam extraction is connected with the fifth industrial steam extraction electric door, then is integrated into a fifth industrial steam extraction pipeline, and is connected with the fifth industrial steam extraction to steam separation cylinder electric door through the fifth industrial steam extraction pipeline;
the secondary steam extraction is connected with a second high-pressure heater, the secondary steam extraction is connected with a secondary industrial steam extraction valve group, the secondary industrial steam extraction valve is simultaneously connected with the safety valve, the secondary industrial steam extraction valve group is simultaneously connected with a drainage valve group, and the secondary industrial steam extraction valve group is connected with a fourth-fifth industrial steam extraction pipeline manual door;
the one-suction industrial steam extraction valve group comprises an electric door, an adjusting door and front and back manual doors of the electric door; the temperature reducing valve group comprises an adjusting door, a manual door in front of the adjusting door, a back check door of the adjusting door and the manual door, so that an industrial steam extraction valve and a temperature reducing valve can be conveniently and efficiently and quickly adjusted, a safety valve arranged on a back pipeline of the temperature reducing device is an empty safety valve, the safety of equipment and pipelines can be ensured through the empty safety valve, and the pipelines from the primary steam extraction and the secondary steam extraction to the fifth industrial steam extraction are provided with a drainage valve group, so that water and heating pipes can be fully transported before operation;
the air safety valve comprises a valve body (1), an air inlet channel (3) is formed in the bottom of the valve body (1), a valve seat (5) is fixedly arranged at the top of the air inlet channel (3), an exhaust pipe (4) is formed in the side face of the valve body (1), a valve cover (2) is fixedly arranged at the top of the valve body (1) through a flange and a screw, an upper spring disc (6) is fixedly arranged at the top of the inner side of the valve cover (2), a pressure spring (8) is fixedly arranged at the bottom of the upper spring disc (6), a lower spring disc (11) is fixedly arranged at the bottom of the pressure spring (8), a valve rod (7) is movably sleeved on the inner side of the upper spring disc (6), the valve rod (7) is fixedly sleeved with the lower spring disc (11), and a cleaning mechanism (10) is arranged at the bottom of the valve rod (7);
the cleaning mechanism (10) comprises a cleaning disc (13), a pneumatic blade (12) and a rotating rod (17), wherein the rotating rod (17) is fixedly sleeved at the bottom of the valve rod (7), a rotating bearing is arranged at the joint of the rotating rod (17) and the valve rod (7), the pneumatic blade (12) is fixedly arranged on the surface side wall of the rotating rod (17), the cleaning disc (13) is fixedly sleeved with the rotating rod (17), a fixing box (14) is fixedly arranged on the inner side of the cleaning disc (13), a telescopic spring (15) is fixedly arranged on one side, close to the rotating rod (17), of the inner side of the fixing box (14), and a cleaning rod (16) is fixedly arranged at the other end of the telescopic spring (15).
2. A method for standby-up of industrial steam extraction using an industrial steam extraction liaison system according to claim 1, comprising the steps of:
the fourth machine to the fifth industrial steam extraction pipeline door are kept fully open during the hot standby, an electric door, an adjusting door and a temperature reducing water adjusting door in the first extraction industrial steam extraction valve group are kept closed, a water supply main pipe of the fourth machine is kept open to the first extraction temperature reducing valve group, other manual doors are kept open, a drain door is properly opened, and the electric door and the adjusting door are interlocked at the input position;
after receiving a command of stopping the operation of the fifth industrial steam extraction, immediately stopping the operation of the first high-pressure heater and the second high-pressure heater, closing steam inlet electric doors of the first high-pressure heater and the second high-pressure heater, and after stopping the operation of the high-pressure heater, opening electric doors and regulating doors in the two-extraction industrial steam extraction valve group, and putting into the two-extraction industrial steam extraction;
and opening an electric door and an adjusting door in a fourth machine one-extraction industrial steam extraction valve group, and feeding a water mother pipe to the one-extraction temperature-reduction valve group by the fourth machine to extract industrial steam.
3. A standby method for industrial steam extraction according to claim 2 wherein the temperature of the main industrial steam extraction pipe is kept between 240 ℃ and 300 ℃ and the pressure of the main industrial steam extraction pipe is not more than 0.85 MPa to 0.9MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112059.6A CN114046494B (en) | 2021-09-23 | 2021-09-23 | Communication system and standby method for industrial steam extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111112059.6A CN114046494B (en) | 2021-09-23 | 2021-09-23 | Communication system and standby method for industrial steam extraction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114046494A CN114046494A (en) | 2022-02-15 |
| CN114046494B true CN114046494B (en) | 2024-03-22 |
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