CN111255534A - 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
- Publication number
- CN111255534A CN111255534A CN202010247203.6A CN202010247203A CN111255534A CN 111255534 A CN111255534 A CN 111255534A CN 202010247203 A CN202010247203 A CN 202010247203A CN 111255534 A CN111255534 A CN 111255534A
- Authority
- CN
- China
- Prior art keywords
- steam
- water
- storage device
- enters
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003860 storage Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 123
- 239000013589 supplement Substances 0.000 claims abstract description 8
- 238000000889 atomisation Methods 0.000 claims description 15
- 229920006395 saturated elastomer Polymers 0.000 claims description 14
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 230000008016 vaporization Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000009834 vaporization Methods 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a steam storage peak regulation system and 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, after the exhaust steam of the high-pressure cylinder enters the boiler to be heated for the second time, one part of the exhaust steam enters an intermediate pressure cylinder to do work, and the other part of the exhaust steam converges into a steam supply main pipe to supply outside; the exhaust steam of the intermediate 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; condensed water of the condenser sequentially passes through the low-pressure heater group and the high-pressure heater group and enters the boiler to complete the whole circulation; the invention stores industrial steam during the peak of electricity utilization, releases the industrial steam as the supplement of the whole plant steam supply during the deep peak regulation of the coal-fired unit, plays the role of peak shifting and valley filling, and improves the deep peak regulation capability and the profitability under the condition of ensuring the external steam supply of the coal-fired unit.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the field of comprehensive utilization of heat supply networks, and relates to a steam storage peak regulation system and method applied to an industrial steam supply system of a coal-fired unit.
[ background of the invention ]
With the social development and the continuous adjustment of industrial structures, the power utilization structure changes continuously, the power system faces the increasingly aggravated peak regulation problem, and the deficiency of the peak regulation capability of the system becomes an important factor for restricting the power development. The peak load regulation of the power grid is difficult and the new energy electric power rejection phenomenon is frequent due to factors such as large power supply and demand, great increase of installed capacity of wind energy, solar energy and water energy electric power, increase of peak-to-valley difference of electric load of the power grid, continuous increase of external electric power input and the like.
The coal-fired power generating unit bearing industrial steam supply is suitable for meeting the requirements of steam-using enterprises according to quality and quantity while responding to the deep peak regulation requirement of a power grid, otherwise, users have the problem of production reduction and even production stop caused by the reduction of steam consumption, and serious economic loss is caused. The coal-fired power generating unit bearing industrial steam supply has the common problem of power industry that the industrial steam supply capacity is rapidly reduced when low load participates in deep peak regulation, and no effective solution is publicly reported at present.
[ summary of the invention ]
The invention aims to solve the problems in the prior art and provides a steam storage peak regulation system and method applied to an industrial steam supply system of a coal-fired unit.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a steam storage peak shaving system applied to an industrial steam supply system of a coal-fired unit comprises:
the new steam at the outlet of the boiler superheater enters a high-pressure cylinder to do work, the exhaust steam of the high-pressure cylinder enters a boiler reheater to be heated for the second time, one part of the exhaust steam enters an intermediate pressure cylinder to do work, and the other part of the exhaust steam converges into a steam supply main pipe to supply outside; the exhaust steam of the intermediate 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 and enters the boiler to complete the whole circulation;
and the steam storage device is connected in parallel on the steam supply main pipe.
The invention further improves the following steps:
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 a pipeline of a steam inlet and a steam supply main pipe of the steam storage device, and a third valve group is arranged on a pipeline of a 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.
And a fourth valve group is arranged on a pipeline at the demineralized water inlet of the steam storage device.
The steam storage device comprises a water storage tank body, 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 replenishing 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 on the upper part of the water storage tank body is of a vertical cylindrical structure, and the side surface of the atomization heat exchange area is provided with a plurality of inlets, wherein a half cycle is a steam inlet, and the other half cycle is a demineralized water inlet; the steam inlet is communicated with the industrial steam loop, and the demineralized water inlet is communicated with the demineralized water loop.
And the tail ends of the industrial steam loop and the desalted water loop are both provided with atomizing nozzles, 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 demineralized water ring pipe.
A steam storage peak regulation method applied to an industrial steam supply system of a coal-fired unit comprises the following steps:
when the industrial steam supply can meet the requirements of users:
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, part of the exhausted steam enters a middle-pressure cylinder to do work after being heated for the second time by the boiler, and part of the exhausted steam is converged into a steam supply main pipe to be supplied to the outside; the low-pressure cylinder exhaust steam enters a condenser for condensation, the desalted water and the supplemented water enter the condenser for thermal deoxidization, and the condensed water sequentially passes through a condensed water pump, a low-pressure heater group, a water feeding pump and a high-pressure heater group and then enters a boiler to complete the whole cycle; 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, industrial steam is continuously contacted with demineralized water in the steam storage device for heat exchange, when the temperature of the demineralized water in the steam storage device reaches a saturation temperature corresponding to the pressure, the steam storage process is considered to be finished, and abundant part of industrial steam is stored in a high-pressure high-temperature near-saturation water mode;
when the coal-fired power generating unit participates in the deep peak shaving of the power grid, the steam turbine generator unit operates at low load, and when the industrial steam supply capacity is not enough to meet the requirements of users:
closing the first valve group, opening the third valve group, the fourth valve group and the pressure reducer, feeding the high-pressure and high-temperature near saturated water serving as industrial steam supplement after vaporization to the steam supply main pipe for supplying to external users, feeding the low-temperature demineralized water into the steam storage device through the fourth valve group, converting the steam storage device into a steam release mode at the moment, feeding the high-pressure and high-temperature near saturated water serving as industrial steam supplement after vaporization to the steam supply main pipe for supplying to users, gradually vaporizing and discharging the high-pressure and high-temperature near saturated water along with the upper layer of the high-pressure and high-temperature near saturated water, and feeding the low-temperature demineralized water into each steam storage device through the fourth valve; the upper layer of the steam storage device is continuously vaporized and discharged, the lower layer of the steam storage device is continuously injected with equal amount of low-temperature demineralized water, the interior 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 interior of the steam storage device is completely filled with the low-temperature demineralized water.
Compared with the prior art, the invention has the following beneficial effects:
the invention stores industrial steam during the peak of electricity utilization, releases the industrial steam as the supplement of the whole plant steam supply during the deep peak regulation of the coal-fired unit, plays the role of peak shifting and valley filling, and improves the deep peak regulation capability and the profitability under the condition of ensuring the external steam supply of the coal-fired unit.
[ description of the drawings ]
FIG. 1 is a schematic view of the structure of a steam storage device according to the present invention;
FIG. 2 is a schematic structural view of an atomization heat exchange zone of the steam storage device of the present invention;
fig. 3 is a schematic diagram of the vapor storage peak shaving system of the present invention.
Wherein, 1-a boiler; 2-high pressure cylinder; 3, a medium pressure cylinder; 4-low pressure cylinder; 5-a condenser; 6-a condensate pump; 7-low pressure heater group; 8-a water supply pump; 9-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 relief valve; 15-a vapor storage device; 16-industrial steam loop; 17-a demineralized water loop; 18-self-circulating pipeline pump.
[ detailed description ] embodiments
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
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. In addition, if a layer/element is "on" another layer/element in one orientation, then that layer/element may be "under" the other layer/element when the orientation is reversed.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or 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 accompanying drawings:
referring to fig. 3, the invention is applied to the steam storage peak shaving system of the industrial steam supply system of the coal-fired unit, comprising a boiler 1 and a steam storage device 15; fresh steam at the outlet of a superheater of the boiler 1 enters a high-pressure cylinder 2 to do work, after exhaust steam of the high-pressure cylinder 2 enters a reheater of the boiler 1 to be heated for the second time, one part of the exhaust steam enters an intermediate-pressure cylinder 3 to do work, and the other part of the exhaust steam is converged into a steam supply main pipe to be supplied to the outside; the exhaust steam of the intermediate 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 deoxidization; the condensed water of the condenser 5 sequentially passes through a low-pressure heater group 7 and a high-pressure heater group 9 to enter the boiler 1 to complete the whole circulation; the steam storage device 15 is connected in parallel to the steam supply main pipe. A condensate pump 6 is arranged between the condenser 5 and the low-pressure heater group 7; a 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 a pipeline of a steam inlet and a steam supply main pipe of the steam storage device 15, and a third valve group 12 is arranged on a pipeline of a 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 a steam supply main pipe. A fourth valve group 14 is arranged on a pipeline at the demineralized water inlet of the steam storage device 15. The steam storage device 15 comprises a water storage tank body, 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 replenishing 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 on the upper part of the water storage tank body is of a vertical cylindrical structure, and the side surface of the atomization heat exchange area is provided with a plurality of inlets, wherein a half cycle is a steam inlet, and the other half cycle is a demineralized water inlet; the steam inlet is in communication with industrial steam loop 16 and the demineralized water inlet is in communication with demineralized water loop 17.
The end of the industrial steam loop 16 and the end of the demineralized water loop 17 are both provided with atomizing nozzles which form an annular pipe network in the 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 18, and the outlet of the self-circulating pipeline pump 18 is communicated with the inlet of the demineralized water circular pipe 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 pressure reduction steam supply system, a water supplementing pipeline and the like. The atomization heat exchange area adopts a cylindrical structure, steam and demineralized water respectively occupy half areas in an annular pipe network form, and atomization nozzles are uniformly arranged on the annular pipe network. And (3) a steam storage process: the steam and the desalted water are atomized at high speed in an opposite mode to contact and exchange heat, and fall into a lower water storage area in a water drop mode. In order to improve the mixed heating effect, a self-circulation pipeline system is arranged, the lower layer water in the water storage area enters the atomization heat exchange area in an atomization mode after being pressurized by a pipeline circulating pump, and is heated repeatedly in sequence, so that the industrial steam can be stored in a high-pressure and high-temperature near-saturation water mode. And (3) a steam releasing process: the high-pressure and high-temperature near saturated water is vaporized and then used as industrial steam supplement to enter a steam supply main pipe to be supplied to users, the high-pressure and high-temperature near saturated water on the upper layer is gradually vaporized and discharged outside, and the low-temperature demineralized 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 of the steam storage device is continuously injected with equal amount of low-temperature demineralized water, the interior 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 interior of the steam storage device is completely filled with the low-temperature demineralized water.
The working process of the invention is as follows:
the steam storage device is suitable for overall optimization design according to factors such as the change characteristic of the industrial steam supply capacity of the coal-fired generator set along with the electric load, the distribution characteristic of the external steam supply load, the deep peak regulation load rate requirement, the duration and the like, the utilization rate is low when the steam storage device is too large, and the peak regulation requirement cannot be effectively met when the steam storage device is too small.
When the unit is in high-load operation, the industrial steam supply capacity is large, and the capacity is reduced and the margin capacity is stored under the condition of meeting the user requirement: the new steam at the outlet of the boiler 1 enters the high pressure cylinder 2 to do work, part of the exhausted steam enters the steam turbine intermediate pressure cylinder 3 to do work after the secondary heating of the boiler, and part of the exhausted steam is converged into the whole plant steam supply main pipe to be supplied to the outside. 4 steam exhausts of low pressure jar get into condenser 5 condensation, and the desalination moisturizing gets into condenser 5 and realizes the thermal power deoxidization, and the condensate water gets into boiler 1 behind condensate pump 6, low pressure heater group 7, feed pump 8 and high pressure heater group 9 in proper order, accomplishes whole circulation. A part of steam in the steam supply main pipe enters a steam storage device 15 through a valve group 10, at the moment, the valve groups 12 and 13 are closed, a pressure reducer 14 is closed, and abundant part of industrial steam is stored in a high-pressure high-temperature near-saturated water mode. When the coal-fired power generating unit participates in deep peak shaving of a power grid, the steam turbine generator unit operates at low load, the industrial steam supply capacity is not enough to meet external requirements, at the moment, the steam storage device 15 is switched to a steam release mode, the valve group 10 is closed, the valve groups 12 and 13 are opened, the pressure reducer 14 is opened, high-pressure and high-temperature nearly saturated water is vaporized and then used as industrial steam for supplement, enters a steam supply main pipe and is supplied to external users, low-temperature demineralized water enters the steam storage device 15 through the valve group 13 and is gradually replaced in a layered mode from bottom to top.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (9)
1. A be applied to coal-fired unit industry and supply vapour peak shaving system of storage of vapour system which characterized in that includes:
the new steam at the outlet of the superheater of the boiler (1) enters a high-pressure cylinder (2) to do work, the exhaust steam of the high-pressure cylinder (2) enters a reheater of the boiler (1) to be heated for the second time, one part of the exhaust steam enters an intermediate-pressure cylinder (3) to do work, and the other part of the exhaust steam converges into a steam supply main pipe to supply outside; the system comprises an intermediate pressure cylinder (3), wherein exhaust steam of the intermediate pressure cylinder (3) enters a low pressure cylinder (4) to do work, and exhaust steam of the low pressure cylinder (4) enters a condenser (5) to perform thermal deoxidization; the condensed water of the condenser (5) sequentially passes through the low-pressure heater group (7) and the high-pressure heater group (9) and enters the boiler (1) to complete the whole circulation;
the steam storage device (15), the steam storage device (15) is connected in parallel on the steam supply main pipe.
2. The steam storage and peak shaving system applied to the industrial steam supply system of the coal-fired unit according to claim 1, characterized in that a condensate pump (6) is arranged between the condenser (5) and the low-pressure heater group (7); a water feeding pump (8) is arranged between the low-pressure heater group (7) and the high-pressure heater group (9).
3. The steam storage peak shaving system applied to the industrial steam supply system of the coal-fired unit as claimed in claim 1, wherein a first valve set (10) is arranged on the pipelines of the steam inlet and the steam supply main pipe of the steam storage device (15), and a third valve set (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 (15) and the steam supply main pipe.
4. The steam storage peak shaving system applied to the industrial steam supply system of the coal-fired unit as claimed in claim 3, wherein a fourth valve set (14) is arranged on the pipeline at the demineralized water inlet of the steam storage device (15).
5. The steam storage peak shaving system applied to the industrial steam supply system of the coal-fired unit as recited in claim 3, wherein the steam storage device (15) comprises a water storage tank body, 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 replenishing 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 on the upper part of the water storage tank body is of a vertical cylindrical structure, and the side surface of the atomization heat exchange area is provided with a plurality of inlets, wherein a half cycle is a steam inlet, and the other half cycle is a demineralized water inlet; the steam inlet is communicated with an industrial steam loop (16), and the demineralized water inlet is communicated with a demineralized water loop (17).
6. The steam storage and peak shaving system applied to the industrial steam supply system of the coal-fired unit as recited in claim 4, characterized in that the tail end of the industrial steam loop (16) and the tail end of the desalted water loop (17) are provided with atomizing nozzles which form an annular pipe network in the atomizing heat exchange area.
7. The steam storage and peak shaving system for the industrial steam supply system of the coal-fired unit as claimed in claim 6, wherein the atomizing nozzles are uniformly arranged in the circumferential direction and the height direction.
8. The steam storage and peak shaving system applied to the industrial steam supply system of the coal-fired unit as claimed in claim 6, wherein the circulating water outlet 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 demineralized water loop pipe (17).
9. A method for regulating peak storage and delivery of steam for industrial steam supply system of coal-fired power plant using the system of any one of claims 1-8, comprising the steps of:
when the industrial steam supply can meet the requirements of users:
closing the third valve group (12), the fourth valve group (13) and the pressure reducer (14); the new steam at the outlet of the boiler (1) enters a high-pressure cylinder (2) to do work, part of the exhausted steam enters a medium-pressure cylinder (3) to do work after being heated for the second time by the boiler (1), and part of the exhausted steam is converged into a steam supply main pipe and is supplied out; the low-pressure cylinder (4) exhausts steam and enters a condenser (5) for condensation, desalted water and supplemented water enter the condenser (5) for thermal deoxidization, and condensed water sequentially passes through a condensate pump (6), a low-pressure heater group (7), a water feed pump (8) and a high-pressure heater group (9) and then enters a boiler (1) to complete the whole cycle; part of steam of the steam supply main pipe enters a steam storage device (15) through a first valve group (10), the steam storage device (15) is converted into a steam storage mode, industrial steam supply and desalted water inside the steam storage device (15) are in continuous contact heat exchange, when the temperature of the desalted water inside the steam storage device (15) reaches a saturation temperature corresponding to the pressure, the steam storage process is considered to be finished, and rich part of industrial steam is stored in a high-pressure high-temperature near-saturation water mode;
when the coal-fired power generating unit participates in the deep peak shaving of the power grid, the steam turbine generator unit operates at low load, and when the industrial steam supply capacity is not enough 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 reducer (14), opening the high-pressure high-temperature near saturated water as industrial steam supplement after vaporization, feeding the steam supply main pipe for external users, feeding the low-temperature demineralized water into the steam storage device (15) through the fourth valve group (13), switching the steam storage device (15) into a steam release mode, feeding the high-pressure high-temperature near saturated water as industrial steam supplement after vaporization, feeding the steam supply main pipe for users, gradually vaporizing and discharging the low-temperature demineralized water into each steam storage device (15) along with the upper-layer high-pressure high-temperature near saturated water, and feeding the low-temperature demineralized water into 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 of the steam storage device 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 the bottom to the 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 (15) is completely filled with the low-temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010247203.6A CN111255534A (en) | 2020-03-31 | 2020-03-31 | Steam storage peak regulation system and method applied to industrial steam supply system of coal-fired unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010247203.6A CN111255534A (en) | 2020-03-31 | 2020-03-31 | Steam storage peak regulation system and method applied to industrial steam supply system of coal-fired unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111255534A true CN111255534A (en) | 2020-06-09 |
Family
ID=70949942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010247203.6A Pending CN111255534A (en) | 2020-03-31 | 2020-03-31 | Steam storage peak regulation system and method applied to industrial steam supply system of coal-fired unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111255534A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178615A (en) * | 2020-09-29 | 2021-01-05 | 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 |
| WO2023274239A1 (en) * | 2021-06-29 | 2023-01-05 | 西安热工研究院有限公司 | Method and system for optimizing operation of industrial steam power plant coupled with molten salt heat storage |
| CN116734230A (en) * | 2023-08-14 | 2023-09-12 | 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 (16)
| 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 |
| US20140208752A1 (en) * | 2011-02-07 | 2014-07-31 | Krishna Moorthy Palanisamy | Method and apparatus of producing and utilizing thermal energy in a combined heat and 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 |
-
2020
- 2020-03-31 CN CN202010247203.6A patent/CN111255534A/en active Pending
Patent Citations (16)
| 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 |
| US20140208752A1 (en) * | 2011-02-07 | 2014-07-31 | Krishna Moorthy Palanisamy | Method and apparatus of producing and utilizing thermal energy in a combined heat and power plant |
| 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 |
|---|
| 春健;: "300 MW纯凝机组再热蒸汽系统供热改造方案研究", 应用能源技术, no. 12 * |
| 沈建锋;刘伟;: "蒸汽蓄热器设计要点及案例分析", 节能技术, no. 04 * |
| 黄嘉驷;刘永林;付亦葳;王伟;徐海涛;居文平;: "200 MW机组蒸汽旁路热电解耦能力评估", 热力发电, no. 10 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112178615A (en) * | 2020-09-29 | 2021-01-05 | 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 |
| 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 |
| WO2023274239A1 (en) * | 2021-06-29 | 2023-01-05 | 西安热工研究院有限公司 | Method and system for optimizing operation of industrial steam power plant coupled with molten salt heat storage |
| CN116734230A (en) * | 2023-08-14 | 2023-09-12 | 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 |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111255534A (en) | Steam storage peak regulation system and method applied to industrial steam supply system of coal-fired unit | |
| CN114233417B (en) | Heat storage type deep flexible peak regulation thermal power generation system and heat storage and release method | |
| CN107940538B (en) | Graded heat storage system for cogeneration unit and peak shaving method thereof | |
| CN212406829U (en) | System for realizing wide-load stable heat supply | |
| CN114382559B (en) | Double-medium heat storage type peak regulation thermal power generation system and heat storage and release method | |
| CN113175362B (en) | Bus pipe connection system for realizing zero output of low-pressure cylinder and operation method | |
| CN111336492A (en) | Steam storage system and method for effectively avoiding frequent start and stop of back pressure steam supply unit | |
| CN109595045B (en) | Energy storage system for efficient and flexible heat supply of ultra-supercritical secondary reheating unit | |
| CN111102549A (en) | Single-tank molten salt thermocline heat storage system and method for coal-fired power generating unit | |
| CN211950613U (en) | Steam storage peak regulation system applied to industrial steam supply system of coal-fired unit | |
| CN215676608U (en) | Fused salt energy storage electric power peak regulation system | |
| CN109026240B (en) | Power generation system and method based on nuclear energy and solar energy coupling | |
| CN109113813B (en) | Heat accumulation power generation system | |
| CN110701601A (en) | System and method for realizing large-flow water-replenishing efficient deoxidization of industrial heat supply unit | |
| CN215170237U (en) | Flexible peak shaving system of thermal power plant based on heat storage | |
| CN116045709A (en) | Fused salt energy storage peak regulation system with flue gas temperature control function | |
| CN215174935U (en) | High-low temperature heat storage peak shaving system of thermal power plant | |
| CN212132393U (en) | Steam storage device and system for reducing heat loss of pipe network | |
| CN114992619A (en) | Combined heat and power generation unit based on fused salt heat storage | |
| CN212408811U (en) | Heat supply network peak heating system | |
| CN212132394U (en) | Steam storage system capable of effectively avoiding frequent start and stop of back pressure steam supply unit | |
| CN211871454U (en) | Water and electricity cogeneration system for realizing no cold source loss of coal-fired power station | |
| CN111336491A (en) | Steam storage device, system and method for reducing heat loss of pipe network | |
| CN111878949A (en) | Low-pressure-cylinder few-steam heating system and method capable of achieving annual operation | |
| CN211011315U (en) | System for realizing large-flow water-replenishing high-efficiency deoxidization of industrial heat supply unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |