CN111255534B - Steam storage peak regulation system and method applied to industrial steam supply system of coal-fired unit - Google Patents
Steam storage peak regulation system and method applied to industrial steam supply system of coal-fired unit Download PDFInfo
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- CN111255534B CN111255534B CN202010247203.6A CN202010247203A CN111255534B CN 111255534 B CN111255534 B CN 111255534B CN 202010247203 A CN202010247203 A CN 202010247203A CN 111255534 B CN111255534 B CN 111255534B
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- 238000003860 storage Methods 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000033228 biological regulation Effects 0.000 title abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 124
- 239000013589 supplement Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000000889 atomisation Methods 0.000 claims description 16
- 229920006395 saturated elastomer Polymers 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 7
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 238000010612 desalination reaction Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 238000011033 desalting Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
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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
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
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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
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
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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
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
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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
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Water Supply & Treatment (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The invention discloses a steam storage peak regulation system and a steam storage peak regulation method applied to an industrial steam supply system of a coal-fired unit. The new steam at the outlet of the boiler enters a high-pressure cylinder to do work, and the exhaust steam of the high-pressure cylinder enters the boiler to do secondary heating, wherein one part enters a medium-pressure cylinder to do work, and the other part is converged into a steam supply main pipe to be externally supplied; the exhaust steam of the medium pressure cylinder enters the low pressure cylinder to do work, and the exhaust steam of the low pressure cylinder enters the condenser to perform thermal deoxidization; the condensed water of the condenser sequentially passes through the low-pressure heater group and the high-pressure heater group to enter the boiler to complete the whole cycle; the invention stores industrial steam when electricity is used in peak, releases the industrial steam as the supplement of the steam supply of the whole plant when the coal-fired unit deeply peaks, plays the role of peak staggering and valley filling, and improves the deep peak regulation capacity and the profitability of the coal-fired unit under the condition of guaranteeing the external steam supply.
Description
[ Field of technology ]
The invention belongs to the field of comprehensive utilization of a heat supply network, and relates to a steam storage peak regulation system and method applied to a coal-fired unit industrial steam supply system.
[ Background Art ]
With the continuous adjustment of social development and industrial structures, the power utilization structure is changed continuously, the power system faces the increasingly serious peak shaving problem, and the defect of the peak shaving capacity of the system becomes an important factor for restricting the power development. The power supply is larger than the demand, the installed capacity of wind energy, solar energy, water energy and electric power is greatly improved, the peak-valley difference of the power grid power load is increased, the external power supply is continuously increased, and the like, so that the power grid peak regulation is difficult, and the phenomenon that new energy power is abandoned frequently occurs.
The coal-fired generator set for industrial steam supply is suitable for meeting the requirements of steam-using enterprises according to quality while responding to the deep peak regulation requirements of the power grid, otherwise, users cause the problems of yield reduction and even production stopping due to the reduction of the steam consumption, and serious economic loss is caused. The coal-fired generator set for bearing industrial steam supply, the steep decline of the industrial steam supply capability when the low load participates in deep peak regulation belongs to the common problem of the power industry, and no effective solution is disclosed at present.
[ Invention ]
The invention aims to solve the problems in the prior art and provides a steam storage peak regulation system and a steam storage peak regulation method applied to a coal-fired unit industrial steam supply system.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a steam storage peak shaving system for a coal-fired unit industrial steam supply system, comprising:
the new steam at the outlet of the boiler superheater enters a high-pressure cylinder to do work, and after the exhaust steam of the high-pressure cylinder enters a boiler reheater to perform secondary heating, one part of the exhaust steam enters a medium-pressure cylinder to do work, and the other part of the exhaust steam is converged into a steam supply main pipe to be externally supplied; the exhaust steam of the medium pressure cylinder enters the low pressure cylinder to do work, and the exhaust steam of the low pressure cylinder enters the condenser to perform thermal deoxidation; the condensed water of the condenser sequentially passes through the low-pressure heater group and the high-pressure heater group to enter the boiler to complete the whole circulation;
The steam storage device is connected in parallel to the steam supply main pipe.
The invention is further improved in that:
A condensate pump is arranged between the condenser and the low-pressure heater group; a water feeding pump is arranged between the low-pressure heater group and the high-pressure heater group.
A first valve group is arranged on the steam inlet of the steam storage device and the pipeline of the steam supply main pipe, and a third valve group is arranged on the pipeline of the steam supply outlet; the steam storage device is connected in parallel with the second valve group of the steam supply main pipe; a pressure reducing valve is arranged on a pipeline between a steam supply outlet of the steam storage device and the steam supply main pipe.
A fourth valve group is arranged on a pipeline at the desalted water inlet of the steam storage device.
The steam storage device comprises a water storage tank body, wherein the lower part of the water storage tank body is a water storage area, and the upper part of the water storage tank body is an atomization heat exchange area; the bottom of the water storage area is provided with a low-temperature desalted water supplementing inlet and a self-circulating water outlet, and the upper part of the water storage area is provided with a steam supply outlet;
The atomization heat exchange area at the upper part of the water storage tank body is of a vertical cylindrical barrel structure, a plurality of inlets are formed in the side face of the atomization heat exchange area, wherein the half circumference is a steam inlet, and the other half circumference is a demineralized water inlet; the steam inlet is communicated with an industrial steam loop, and the desalted water inlet is communicated with a desalted water loop.
The tail end of the industrial steam loop and the tail end of the desalted water loop are respectively provided with an atomizing nozzle, and the atomizing nozzles form an annular pipe network in an atomizing heat exchange area.
The atomizing nozzles are uniformly arranged in the circumferential direction and the height direction.
The circulating water outlet is connected with a self-circulating pipeline pump, and the outlet of the self-circulating pipeline pump is communicated with the inlet of the desalted water loop.
A method for storing and regulating peak of industrial steam supply system of coal-fired unit includes the following steps:
when the industrial steam supply can meet the user demand:
Closing the third valve group, the fourth valve group and the pressure reducer; the new steam at the outlet of the boiler enters a high-pressure cylinder to do work, a part of the exhaust steam enters a medium-pressure cylinder to do work after being secondarily heated by the boiler, and a part of the exhaust steam is converged into a steam supply main pipe to be externally supplied; the low-pressure cylinder exhaust steam enters a condenser for condensation, the desalting and water supplementing enters the condenser for thermal deoxidization, and the condensed water sequentially passes through a condensed water pump, a low-pressure heater group, a water supply pump and a high-pressure heater group and then enters a boiler to complete the whole cycle; a part of steam of the steam supply main pipe enters the steam storage device through the first valve group, the steam storage device is converted into a steam storage mode, the industrial steam supply and desalted water in the steam storage device are in continuous contact heat exchange, when the temperature of the desalted water in the steam storage device reaches the saturation temperature corresponding to the pressure, the steam storage process is considered to be finished, and the abundant part of industrial steam is stored in a high-pressure and high-temperature near-saturation water form;
when the coal-fired generator set participates in deep peak shaving of the power grid, the steam turbine generator set operates under low load, and when the industrial steam supply capacity is insufficient to meet the requirements of users:
Closing the first valve group, opening the third valve group, the fourth valve group and the pressure reducer, and taking the vaporized high-pressure and high-temperature nearly saturated water as industrial steam supplement, entering a steam supply main pipe to supply to external users, enabling low-temperature desalted water to enter a steam storage device through the fourth valve group, converting the steam storage device into a steam release mode, taking the vaporized high-pressure and high-temperature nearly saturated water as industrial steam supplement, entering the steam supply main pipe to supply to users, gradually vaporizing and discharging the nearly saturated water along with the high-pressure and high-temperature upper layer, and enabling the low-temperature desalted water to enter each steam storage device through the fourth valve group; the upper layer of the steam storage device is continuously vaporized and discharged, the lower layer is continuously injected with equal amount of low-temperature demineralized water, the inside of the steam storage device is always in a full water state, high-temperature water and low-temperature water are always in a layered state, the low-temperature water pushes the high-temperature water to be vaporized and discharged from bottom to top in the whole steam discharging process, when high-pressure and high-temperature nearly saturated water is completely vaporized and discharged, the inside of the steam storage device is completely filled with the low-temperature demineralized water, and the steam discharging process is finished.
Compared with the prior art, the invention has the following beneficial effects:
The invention stores industrial steam when electricity is used in peak, releases the industrial steam as the supplement of the steam supply of the whole plant when the coal-fired unit deeply peaks, plays the role of peak staggering and valley filling, and improves the deep peak regulation capacity and the profitability of the coal-fired unit under the condition of guaranteeing the external steam supply.
[ Description of the drawings ]
FIG. 1 is a schematic view of a vapor storage device according to the present invention;
FIG. 2 is a schematic diagram of an atomization heat exchange zone of the vapor storage device of the present invention;
FIG. 3 is a schematic diagram of a vapor storage peak shaving system according to the present invention.
Wherein, 1-boiler; 2-a high-pressure cylinder; 3, a medium pressure cylinder; 4-a low pressure cylinder; 5-a condenser; 6-a condensate pump; 7-a low pressure heater group; 8-a water supply pump; 9-a high pressure heater group; 10-a first valve group; 11-a second valve group; 12-a third valve group; 13-fourth valve group; 14-a pressure reducing valve; 15-a steam storage device; 16-industrial steam loop; 17-desalting water loop; 18-self-circulation pipeline pump.
[ Detailed description ] of the invention
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments, but not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Various structural schematic diagrams according to the disclosed embodiments of the present invention are shown in the accompanying drawings. The figures are not drawn to scale, wherein certain details are exaggerated for clarity of presentation and may have been omitted. The shapes of the various regions, layers and their relative sizes, positional relationships shown in the drawings are merely exemplary, may in practice deviate due to manufacturing tolerances or technical limitations, and one skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions as actually required.
In the context of the present disclosure, when a layer/element is referred to as being "on" another layer/element, it can be directly on the other layer/element or intervening layers/elements may be present therebetween. In addition, if one layer/element is located "on" another layer/element in one orientation, that layer/element may be located "under" the other layer/element when the orientation is turned.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the attached drawing figures:
Referring to fig. 3, the invention is applied to a steam storage peak shaving system of a coal-fired unit industrial steam supply system, and comprises a boiler 1 and a steam storage device 15; the new steam at the outlet of the superheater of the boiler 1 enters a high-pressure cylinder 2 to do work, and after the exhaust steam of the high-pressure cylinder 2 enters a reheater of the boiler 1 to carry out secondary heating, one part of the exhaust steam enters a medium-pressure cylinder 3 to do work, and the other part of the exhaust steam enters a steam supply main pipe to be externally supplied; the exhaust steam of the middle pressure cylinder 3 enters the low pressure cylinder 4 to do work, and the exhaust steam of the low pressure cylinder 4 enters the condenser 5 to perform thermal deoxygenation; the condenser 5, the condensed water of the condenser 5 enters the boiler 1 to complete the whole circulation through the low-pressure heater group 7 and the high-pressure heater group 9 in sequence; the steam storage device 15 is connected in parallel with the steam supply main pipe. A condensate pump 6 is arranged between the condenser 5 and the low-pressure heater group 7; a water feed pump 8 is arranged between the low-pressure heater group 7 and the high-pressure heater group 9.
A first valve group 10 is arranged on the steam inlet of the steam storage device 15 and the pipeline of the steam supply main pipe, and a third valve group 12 is arranged on the pipeline of the steam supply outlet; the steam storage device 15 is connected in parallel with the second valve group 11 of the steam supply main pipe; a pressure reducing valve 5 is arranged on a pipeline between a steam supply outlet of the steam storage device 6 and the steam supply main pipe. A fourth valve group 14 is arranged on the pipeline at the desalted water inlet of the steam storage device 15. The steam storage device 15 comprises a water storage tank body, wherein the lower part of the water storage tank body is a water storage area, and the upper part of the water storage tank body is an atomization heat exchange area; the bottom of the water storage area is provided with a low-temperature desalted water supplementing inlet and a circulating water outlet, and the upper part of the water storage area is provided with a steam supply outlet; the atomization heat exchange area at the upper part of the water storage tank body is of a vertical cylindrical barrel structure, a plurality of inlets are formed in the side face of the atomization heat exchange area, wherein the half circumference is a steam inlet, and the other half circumference is a demineralized water inlet; the steam inlet communicates with the industrial steam loop 16 and the desalinated water inlet communicates with the desalinated water loop 17.
The tail end of the industrial steam loop 16 and the tail end of the desalted water loop 17 are respectively provided with an atomizing nozzle, and the atomizing nozzles form an annular pipe network in an atomizing heat exchange area. The atomizing nozzles are uniformly arranged in the circumferential direction and the height direction. The outlet of the circulating water is connected with a self-circulating pipeline pump 18, and the outlet of the self-circulating pipeline pump 18 is communicated with the inlet of the desalted water loop 17.
The principle of the invention is as follows:
The steam storage device consists of an atomization heat exchange area, a water storage area, a steam input pipeline, a self-circulation system, a decompression steam supply system, a water supplementing pipeline and the like. The atomization heat exchange area adopts a cylindrical structure, steam and desalted water occupy half areas respectively in a ring pipe network form, and atomization nozzles are uniformly arranged on the ring pipe network. And (3) a steam storage process: the steam and desalted water are subjected to high-speed atomization contact heat exchange in a counter-form and fall into the lower part Chu Shuiou in a water drop form. In order to improve the mixed heating effect, a self-circulation pipeline system is arranged, and the lower water in the water storage area enters the atomization heat exchange area in an atomization mode after being pressurized by a circulating pump, so that the industrial steam can be stored in a mode of high-pressure and high-temperature near-saturation water. And (3) a steam release process: the high-pressure and high-temperature nearly saturated water is vaporized and then is used as industrial steam supplement, enters a steam supply main pipe to be supplied to users, and is gradually vaporized and discharged along with the high-pressure and high-temperature nearly saturated water on the upper layer, and low-temperature desalted water enters each steam storage device through a fourth valve group. The upper layer of the steam storage device is continuously vaporized and discharged, the lower layer is continuously injected with equal amount of low-temperature demineralized water, the inside of the steam storage device is always in a full water state, high-temperature water and low-temperature water are always in a layered state, the low-temperature water pushes the high-temperature water to be vaporized and discharged from bottom to top in the whole steam discharging process, when high-pressure and high-temperature nearly saturated water is completely vaporized and discharged, the inside of the steam storage device is completely filled with the low-temperature demineralized water, and the steam discharging process is finished.
The working process of the invention comprises the following steps:
The steam storage device is preferably designed in an overall optimization mode according to factors such as the characteristic that the industrial steam supply capacity of the coal-fired power generation unit changes along with the electric load, the external steam supply load distribution characteristic, the deep peak regulation load rate requirement, the duration time and the like, and the over-large utilization rate is easy to cause, and the over-small utilization rate cannot effectively meet the peak regulation requirement.
When the unit operates under high load, the industrial steam supply capacity is high, and the surplus capacity is reduced and stored under the condition of meeting the demands of users: new steam at the outlet of the boiler 1 enters the high-pressure cylinder 2 to do work, and part of the exhaust steam enters the middle-pressure cylinder 3 of the steam turbine to do work after being secondarily heated by the boiler, and the other part of the exhaust steam is converged into the steam supply main pipe of the whole plant to be supplied to the outside. The exhaust steam of the low-pressure cylinder 4 enters the condenser 5 to be condensed, the desalting and water supplementing water enters the condenser 5 to realize thermal deoxidization, and the condensed water sequentially passes through the condensate pump 6, the low-pressure heater group 7, the water feeding pump 8 and the high-pressure heater group 9 and then enters the boiler 1 to complete the whole cycle. A portion of the steam supplied to the main pipe passes through the valve assembly 10 and enters the steam storage device 15, at which time the valve assemblies 12 and 13 are closed, the pressure reducer 14 is closed, and a substantial portion of the industrial steam is stored as high pressure, high temperature, near-saturated water. When the coal-fired generator set participates in deep peak shaving of the power grid, the steam turbine generator set runs under low load, the industrial steam supply capacity is insufficient to meet the external requirements, at the moment, the steam storage device 15 is converted into a steam release mode, the valve set 10 is closed, the valve sets 12 and 13 are opened, the pressure reducer 14 is opened, high-pressure and high-temperature nearly saturated water is vaporized and then is used as industrial steam to supplement, the vaporized nearly saturated water enters a steam supply main pipe to be supplied to external users, low-temperature desalted water enters the steam storage device 15 through the valve set 13, and the nearly saturated water is replaced gradually in a layered mode from bottom to top.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (1)
1. A method for peak shaving of steam storage applied to an industrial steam supply system of a coal-fired unit, the method being based on a peak shaving system of steam storage applied to an industrial steam supply system of a coal-fired unit, the system comprising:
The boiler (1), the new steam of the superheater outlet of the boiler (1) enters the high-pressure cylinder (2) to do work, after the exhaust steam of the high-pressure cylinder (2) enters the reheater of the boiler (1) to do secondary heating, one part of the exhaust steam enters the medium-pressure cylinder (3) to do work, and the other part of the exhaust steam is converged into the main steam supply pipe and is supplied to the outside; the exhaust steam of the medium pressure cylinder (3) enters the low pressure cylinder (4) to do work, and the exhaust steam of the low pressure cylinder (4) enters the condenser (5); the condenser (5), the condensed water of the condenser (5) enters the boiler (1) to complete the whole circulation through the low-pressure heater group (7) and the high-pressure heater group (9) in sequence;
the steam storage device (15) is connected in parallel with the steam supply main pipe;
a condensate pump (6) is arranged between the condenser (5) and the low-pressure heater group (7); a water supply pump (8) is arranged between the low-pressure heater group (7) and the high-pressure heater group (9);
a first valve group (10) is arranged on a steam inlet of the steam storage device (15) and a pipeline of the steam supply main pipe, and a third valve group (12) is arranged on a pipeline of the steam supply outlet; the steam storage device (15) is connected in parallel with the second valve group (11) of the steam supply main pipe; a pressure reducing valve (14) is arranged on a pipeline between a steam supply outlet of the steam storage device (15) and the steam supply main pipe;
A fourth valve group (13) is arranged on a pipeline at the desalted water inlet of the steam storage device (15);
The steam storage device (15) comprises a water storage tank body, wherein the lower part of the water storage tank body is a water storage area, and the upper part of the water storage tank body is an atomization heat exchange area; the bottom of the water storage area is provided with a low-temperature desalted water supplementing inlet and a self-circulating water outlet, and the upper part of the water storage area is provided with a steam supply outlet;
The atomization heat exchange area at the upper part of the water storage tank body is of a vertical cylindrical barrel structure, a plurality of inlets are formed in the side face of the atomization heat exchange area, wherein the half circumference is a steam inlet, and the other half circumference is a demineralized water inlet; the steam inlet is communicated with an industrial steam annular pipe (16), and the desalted water inlet is communicated with a desalted water annular pipe (17);
the tail end of the industrial steam loop pipe (16) and the tail end of the desalted water loop pipe (17) are respectively provided with an atomizing nozzle, and the atomizing nozzles form an annular pipe network in an atomizing heat exchange area;
the atomizing nozzles are uniformly arranged in the circumferential direction and the height direction;
The self-circulation water outlet is connected with a self-circulation pipeline pump (18), and the outlet of the self-circulation pipeline pump (18) is communicated with the inlet of the desalted water loop (17); characterized in that the method comprises the steps of:
when the industrial steam supply can meet the user demand:
closing the third valve group (12), the fourth valve group (13) and the pressure reducing valve (14); new steam at the outlet of the boiler (1) enters the high-pressure cylinder (2) to do work, part of the exhaust steam enters the medium-pressure cylinder (3) to do work after being secondarily heated by the boiler (1), and the other part of the exhaust steam is converged into the steam supply main pipe to be supplied to the outside; the exhaust steam of the low-pressure cylinder (4) enters a condenser (5) for condensation, the desalination and water supplement enter the condenser (5), and the condensed water sequentially passes through a condensate pump (6), a low-pressure heater group (7), a water supply pump (8) and a high-pressure heater group (9) and then enters a boiler (1) to complete the whole cycle; a part of steam of the steam supply main pipe enters the steam storage device (15) through the first valve group (10), the steam storage device (15) is converted into a steam storage mode, the industrial steam supply and the desalted water in the steam storage device (15) are in continuous contact heat exchange, when the temperature of the desalted water in the steam storage device (15) reaches the saturation temperature corresponding to the pressure, the steam storage process is considered to be finished, and the rich part of industrial steam is stored in a high-pressure and high-temperature near-saturation water form;
when the coal-fired generator set participates in deep peak shaving of the power grid, the steam turbine generator set operates under low load, and when the industrial steam supply capacity is insufficient to meet the requirements of users:
Closing the first valve group (10), opening the third valve group (12), the fourth valve group (13) and the pressure reducing valve (14), enabling low-temperature desalted water to enter the steam storage device (15) through the fourth valve group (13), converting the steam storage device (15) into a steam release mode, enabling high-pressure and high-temperature nearly saturated water to be vaporized and then used as industrial steam to supplement, entering the steam supply main pipe for supplying to a user, enabling the upper-layer high-pressure and high-temperature nearly saturated water to be vaporized and discharged gradually, and enabling the low-temperature desalted water to enter each steam storage device (15) through the fourth valve group (13); the upper layer of the steam storage device (15) is continuously vaporized and discharged, the lower layer is continuously injected with low-temperature demineralized water, the inside of the steam storage device is always in a full water state, high-temperature water and low-temperature water are always in a layered state, the low-temperature water pushes the high-temperature water to be vaporized and discharged from bottom to top in the whole steam discharging process, when the high-pressure and high-temperature nearly saturated water is completely vaporized and discharged, the inside of the steam storage device (15) is completely filled with the low-temperature demineralized water, and the steam discharging process is finished.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010247203.6A CN111255534B (en) | 2020-03-31 | 2020-03-31 | Steam storage peak regulation system and method applied to industrial steam supply system of coal-fired unit |
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| CN202010247203.6A CN111255534B (en) | 2020-03-31 | 2020-03-31 | Steam storage peak regulation system and method applied to industrial steam supply system of coal-fired unit |
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| CN111255534A CN111255534A (en) | 2020-06-09 |
| CN111255534B true CN111255534B (en) | 2024-06-11 |
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| CN112178615B (en) * | 2020-09-29 | 2023-02-24 | 西安热工研究院有限公司 | Electric-steam-air cooling multi-combined supply system based on liquid compressed air energy storage system |
| CN113343490B (en) * | 2021-06-29 | 2023-02-24 | 西安热工研究院有限公司 | Industrial steam supply power station operation optimization method and system coupled with molten salt heat storage |
| CN116734230B (en) * | 2023-08-14 | 2024-01-23 | 西安热工研究院有限公司 | Fused salt steam storage system for improving safety of high-temperature gas cooled reactor generator set |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB638198A (en) * | 1948-06-12 | 1950-05-31 | G & J Weir Ltd | Improvements relating to de-aerating apparatus for boiler feed water |
| US5080047A (en) * | 1990-12-31 | 1992-01-14 | Williams Charles L | Cyclic demand steam supply system |
| CN102878824A (en) * | 2011-07-12 | 2013-01-16 | 张贵祥 | Energy-saving heat exchange system with direct vapor-water mixing |
| WO2013132994A1 (en) * | 2012-03-09 | 2013-09-12 | 株式会社日立製作所 | Coal-fired thermal power plant |
| CN106567811A (en) * | 2014-09-24 | 2017-04-19 | 国电龙源电力技术工程有限责任公司 | Power generation system comprising steam heat accumulator |
| CN106931630A (en) * | 2017-05-11 | 2017-07-07 | 沈阳恒久安泰环保与节能科技有限公司 | A kind of novel intelligent hot and cold water mixing constant temperature heating plant |
| CN107631288A (en) * | 2017-09-30 | 2018-01-26 | 北京姚魏环保技术有限公司 | A kind of method of fired power generating unit depth peak regulation and backheat energy-conservation |
| CN108757066A (en) * | 2018-06-13 | 2018-11-06 | 华电电力科学研究院有限公司 | Fired power generating unit backheat hold over system and operation method for load responding |
| CN109139151A (en) * | 2018-08-30 | 2019-01-04 | 华能国际电力股份有限公司丹东电厂 | A kind of thermoelectricity decoupled system with heat accumulation |
| CN109798157A (en) * | 2019-02-02 | 2019-05-24 | 华电电力科学研究院有限公司 | A kind of solidifying pumping back coupling steam extraction integrated system and its operation method for thermoelectricity unit power peak regulation |
| CN109854319A (en) * | 2019-02-02 | 2019-06-07 | 华电电力科学研究院有限公司 | A kind of matched combined cycle extraction for heat supply integrated system of coupling pressure and its operation method |
| CN109869204A (en) * | 2019-02-02 | 2019-06-11 | 华电电力科学研究院有限公司 | A kind of heat supply for Combined cycle gas-steam turbine unit and power peak regulation coupled system and its operation method |
| CN110006026A (en) * | 2019-04-18 | 2019-07-12 | 北京工业大学 | A kind of thermal power plant's depth peak regulation system |
| CN111336492A (en) * | 2020-03-31 | 2020-06-26 | 华能国际电力股份有限公司德州电厂 | Steam storage system and method for effectively avoiding frequent start and stop of back pressure steam supply unit |
| CN211950613U (en) * | 2020-03-31 | 2020-11-17 | 西安西热节能技术有限公司 | Steam storage peak regulation system applied to industrial steam supply system of coal-fired unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2863530C (en) * | 2011-02-07 | 2020-03-10 | Krishna Moorthy PALANISAMY | Method and apparatus of producing and utilizing thermal energy in a combined heat and power plant |
-
2020
- 2020-03-31 CN CN202010247203.6A patent/CN111255534B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB638198A (en) * | 1948-06-12 | 1950-05-31 | G & J Weir Ltd | Improvements relating to de-aerating apparatus for boiler feed water |
| US5080047A (en) * | 1990-12-31 | 1992-01-14 | Williams Charles L | Cyclic demand steam supply system |
| CN102878824A (en) * | 2011-07-12 | 2013-01-16 | 张贵祥 | Energy-saving heat exchange system with direct vapor-water mixing |
| WO2013132994A1 (en) * | 2012-03-09 | 2013-09-12 | 株式会社日立製作所 | Coal-fired thermal power plant |
| CN106567811A (en) * | 2014-09-24 | 2017-04-19 | 国电龙源电力技术工程有限责任公司 | Power generation system comprising steam heat accumulator |
| CN106931630A (en) * | 2017-05-11 | 2017-07-07 | 沈阳恒久安泰环保与节能科技有限公司 | A kind of novel intelligent hot and cold water mixing constant temperature heating plant |
| CN107631288A (en) * | 2017-09-30 | 2018-01-26 | 北京姚魏环保技术有限公司 | A kind of method of fired power generating unit depth peak regulation and backheat energy-conservation |
| CN108757066A (en) * | 2018-06-13 | 2018-11-06 | 华电电力科学研究院有限公司 | Fired power generating unit backheat hold over system and operation method for load responding |
| CN109139151A (en) * | 2018-08-30 | 2019-01-04 | 华能国际电力股份有限公司丹东电厂 | A kind of thermoelectricity decoupled system with heat accumulation |
| CN109798157A (en) * | 2019-02-02 | 2019-05-24 | 华电电力科学研究院有限公司 | A kind of solidifying pumping back coupling steam extraction integrated system and its operation method for thermoelectricity unit power peak regulation |
| CN109854319A (en) * | 2019-02-02 | 2019-06-07 | 华电电力科学研究院有限公司 | A kind of matched combined cycle extraction for heat supply integrated system of coupling pressure and its operation method |
| CN109869204A (en) * | 2019-02-02 | 2019-06-11 | 华电电力科学研究院有限公司 | A kind of heat supply for Combined cycle gas-steam turbine unit and power peak regulation coupled system and its operation method |
| CN110006026A (en) * | 2019-04-18 | 2019-07-12 | 北京工业大学 | A kind of thermal power plant's depth peak regulation system |
| CN111336492A (en) * | 2020-03-31 | 2020-06-26 | 华能国际电力股份有限公司德州电厂 | Steam storage system and method for effectively avoiding frequent start and stop of back pressure steam supply unit |
| CN211950613U (en) * | 2020-03-31 | 2020-11-17 | 西安西热节能技术有限公司 | Steam storage peak regulation system applied to industrial steam supply system of coal-fired unit |
Non-Patent Citations (3)
| Title |
|---|
| 200 MW机组蒸汽旁路热电解耦能力评估;黄嘉驷;刘永林;付亦葳;王伟;徐海涛;居文平;;热力发电(第10期);全文 * |
| 300 MW纯凝机组再热蒸汽系统供热改造方案研究;春健;;应用能源技术(第12期);全文 * |
| 蒸汽蓄热器设计要点及案例分析;沈建锋;刘伟;;节能技术(第04期);全文 * |
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