CN208967776U - A kind of supercritical once-through boiler pipe-line system - Google Patents
A kind of supercritical once-through boiler pipe-line system Download PDFInfo
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- CN208967776U CN208967776U CN201821139512.6U CN201821139512U CN208967776U CN 208967776 U CN208967776 U CN 208967776U CN 201821139512 U CN201821139512 U CN 201821139512U CN 208967776 U CN208967776 U CN 208967776U
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Abstract
The utility model discloses a kind of supercritical once-through boiler pipe-line systems, including water-cooling wall, separator, water tank, hydrophobic development unit, drain tank, wastewater disposal basin, cooling tower, condenser, low-pressure heater, oxygen-eliminating device, high-pressure heater, water supply station and economizer, the water-cooling wall connects the separator, the separator connects the water tank, the water tank connects the hydrophobic development unit, the hydrophobic development unit connects the drain tank, the drain tank is separately connected the wastewater disposal basin, the drain tank is provided with drainage pump, the low-pressure heater connects the oxygen-eliminating device, it was connected with for the first communicating pipe between the water outlet of the water tank and the vapour side of the high-pressure heater, it was connected with for the second communicating pipe between the water outlet of the water tank and the oxygen-eliminating device, the inspection for detecting boiler water quality is provided at the drain tank Survey device.The technical program is for solving the problems, such as that existing unit starting process consumption is big and the starting time is long.
Description
Technical field
The utility model belongs to supercritical once-through boiler technical field, and in particular to a kind of supercritical once-through boiler pipeline system
System.
Background technique
Currently, super (super-) critical direct current cooker has become the main force of China's fired power generating unit, project in construction is numerous.Due to
Direct current cooker does not have natural convection loop when starting, so the sole mode of water wall of monotube boiler cooling is from boiler starting point
Fire keeps certain working medium flow just constantly to boiler feed water, to guarantee the good cooling of heating surface.In order to recycle starting
The working medium and heat of process simultaneously have enough mass velocities in water screen tube when guaranteeing underrun, and direct current cooker needs to be arranged
Special activation system is rinsed and performing low-load running of machine set state is knocked off matter and heat next time with facilitating in boiler thermal-state.With
The limitation of national energy conservation and emission reduction policy and electricity, coal price lattice, each electricity power group take up to optimize new-built unit system,
The activation system for starting to occur without furnace water pump is built in unit.The characteristics of due to direct current furnace starting system without boiler water circulating pump,
In the limitation plus chemical water-making ability, prevent the hot flushing of boiler needs blowing out water, to moisture storage capacity from being carried out continuously
It lights a fire again after meeting the requirements.This not only extends the time of unit cold start, but also consumes a large amount of demineralized waters.In addition, due to
Heat cannot recycle, and boiler economizer inlet water temperature is very low, and boiler is bigger than normal in increasing temperature and pressure stage coal amount, lead to boiler combustion not
Steady and red switch steam parameter mismatches, and seriously affects unit safety starting.
The activation system of the boiler is made of separator, water tank, water storage tank water level regulating valve etc..What separator was isolated
Water enters water tank by the connecting tube below separator, and the water in water tank is drawn by the outlet connecting pipe of lower part, by storage
Cistern water level regulating valve enters hydrophobic development unit, and fraction water evaporation arranges atmosphere, and most of water enters drain tank through connecting tube,
A drain tank outlet arrangement two drainage pumps and drainpipe, in cleaning boiler and igniting initial stage, a large amount of furnace water according to
Its water quality is discharged in wastewater disposal basin or cooling tower or condenser hotwell.
Since, without boiler water circulating pump, this, which is just determined, maintains boiler water wall minimum flow characteristic in the activation system
Power must be realized by feedwater flow.
Utility model content
For the above technical problems, the utility model provides a kind of supercritical once-through boiler pipe-line system, with
Solve the problems, such as that the consumption of unit starting process is big and the starting time is long, which can shorten boiler
The cold start time utmostly improves unit feed temperature, conducive to the matching of red switch steam parameter, saves water resource, reduces
Cost is a kind of improvement structure without boiler water circulating pump Once-through Boiler that economic benefit can be brought to the start-up course of unit.
The utility model provides a kind of supercritical once-through boiler pipe-line system, including water-cooling wall, separator, water tank,
Hydrophobic development unit, drain tank, wastewater disposal basin, cooling tower, condenser, low-pressure heater, oxygen-eliminating device, high-pressure heater, water supply station and
Economizer, the water-cooling wall connect the separator, and the separator connects the water tank, and is provided on the separator
Escape pipe, the water tank connect the hydrophobic development unit, and the hydrophobic development unit connects the drain tank, the drain tank point
The wastewater disposal basin is not connected, and the drain tank is provided with drainage pump, and the drainage pump is used to convey in the water in the drain tank
To cooling tower and/or the condenser, condensate pump, the low pressure are connected between the condenser and the low-pressure heater
Heater connects the oxygen-eliminating device, and feed pump, the hyperbaric heating are connected between the oxygen-eliminating device and the high-pressure heater
Device connects the water supply station, and the water supply station connects the economizer, and the economizer connects the water-cooling wall, the water tank
Water outlet and the high-pressure heater vapour side between be connected with for the first communicating pipe, the water outlet of the water tank is removed with described
It was connected with for the second communicating pipe between oxygen device, is provided with the first shut-off valve and the first regulating valve on first communicating pipe, described
It is provided with the second shut-off valve and the second regulating valve on two communicating pipes, the inspection for detecting boiler water quality is provided at the drain tank
Survey device.
Further, the first drain pipe is also connected between the high-pressure heater and the oxygen-eliminating device, described first dredges
Water pipe is used to the hydrophobic of the high-pressure heater being guided to the oxygen-eliminating device, and it is hydrophobic to be provided with first on first drain pipe
Regulating valve.
Further, the second drain pipe is also connected between the high-pressure heater and the condenser, described second dredges
Water pipe is used to the hydrophobic of the high-pressure heater being guided to the condenser, and it is hydrophobic to be provided with second on second drain pipe
Regulating valve.
Further, be provided with third shut-off valve between the water tank and the hydrophobic development unit, the drain tank with
The 4th shut-off valve is provided between the wastewater disposal basin.
Further, the 5th shut-off valve, drainage pump and the cooling are provided between the drainage pump and the condenser
The 6th shut-off valve is provided between tower.
Further, it is provided between the condensate pump and the low-pressure heater for removing boiler impurities in water
Precision processing device.
This supercritical once-through boiler pipe-line system be directed to supercritical once-through boiler the characteristics of, to boiler startup draining system into
Row transformation, is respectively arranged with the first communicating pipe and second between the water tank and the high-pressure heater and the oxygen-eliminating device
Communicating pipe, the advantages of being transformed in this way, are:
(1) demineralized water has been saved, thermal loss is reduced.In the case where the detection device detects water quality qualification,
Discharge water requires no hydrophobic development unit, is directly entered oxygen-eliminating device or high-pressure heater, recycles heat while saving water,
Boiler economizer inlet water temperature is utmostly improved, is conducive to the stable control with red switch steam parameter of boiler combustion, shortens
It the time of boiler cold-state starting, economizes on resources, reduce cost.
(2) starting of high temperature and pressure is hydrophobic without draining into condenser hotwell, has not only saved condenser hydrophobic development unit and has subtracted
Warm water amount also reduces condensate pump running current, saves station service.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structure chart of supercritical once-through boiler pipe-line system.
Specific embodiment
The utility model discloses a kind of supercritical once-through boiler pipe-line systems, which can
Shorten boiler cold-state and start the time, utmostly improve unit feed temperature, conducive to the matching of red switch steam parameter, saves water money
Source reduces cost.
Below in conjunction with the attached drawing in the utility model, the technical solution in the utility model is carried out clearly and completely
Description, it is clear that described is only the utility model a part of the embodiment, instead of all the embodiments.It is practical based on this
Embodiment in novel, those of ordinary skill in the art are obtained every other without creative labor
Embodiment is fallen within the protection scope of the utility model.
It is shown in Figure 1, the utility model discloses a kind of supercritical once-through boiler pipe-line system, including water-cooling wall 1, point
From device 3, water tank 4, hydrophobic development unit 8, drain tank 9, wastewater disposal basin (not shown), cooling tower (not shown), condenser 26, low pressure
Heater 22, oxygen-eliminating device 21, high-pressure heater 13, water supply station 7 and economizer 2, the water-cooling wall 1 connect the separator 3, institute
It states separator 3 and connects the water tank 4, and be provided with escape pipe 30 on the separator 3, the water tank 4 connects described dredge
Water flash vessel 8, the hydrophobic development unit 8 connect the drain tank 9, and the drain tank 9 is separately connected the wastewater disposal basin, described to dredge
Water tank 9 is provided with drainage pump 29, and the drainage pump 29 is used to for the water in the drain tank 9 being delivered to cooling tower and/or described
Condenser 26 is connected with condensate pump 25, the low-pressure heater 22 between the condenser 26 and the low-pressure heater 22
The oxygen-eliminating device 21 is connected, feed pump 14 is connected between the oxygen-eliminating device 21 and the high-pressure heater 13, the high pressure adds
Hot device 13 connects the water supply station 7, and the water supply station 7 connects the economizer 2, and the economizer 2 connects the water-cooling wall 1,
The first communicating pipe 11, the water tank 4 are connected between the water outlet of the water tank 4 and the vapour side of the high-pressure heater 13
Water outlet and the oxygen-eliminating device 21 between be connected with for the second communicating pipe 18, be provided with the first cut-off on first communicating pipe 11
Valve 10 and the first regulating valve 12 are provided with the second shut-off valve 19 and the second regulating valve 20 on second communicating pipe 18, described to dredge
The detection device (not shown) for detecting boiler water quality is provided at water tank 9.
Mainly the water of cutting isolation water tank 4 enters high-pressure heater when closed for the effect of first shut-off valve 10
13 vapour sides, while the water for also preventing 13 vapour side of high-pressure heater flows backward to water tank 4；The work that first shut-off valve 10 is opened
With being that the high-temperature water of water tank 4 is connected to 13 vapour side of high-pressure heater.
The effect of first regulating valve 12 mainly adjusts the water that water tank 4 enters 13 vapour side of high-pressure heater, prevents
Only 13 vapour side superpressure of high-pressure heater.
Mainly the water of cutting isolation water tank 4 enters oxygen-eliminating device 21 when closed for the effect of second shut-off valve 19,
The water for also preventing oxygen-eliminating device 21 simultaneously flows backward to water tank 4；The effect that second shut-off valve 19 is opened is conducting water tank 4
High-temperature water to oxygen-eliminating device 21.
The effect of second regulating valve 20 mainly adjusts the water that water tank 4 enters oxygen-eliminating device 21, prevents oxygen-eliminating device
21 superpressures.
The first drain pipe 17, first drain pipe are also connected between the high-pressure heater 13 and the oxygen-eliminating device 21
17, for the hydrophobic of the high-pressure heater 13 to be guided to the oxygen-eliminating device 21, are provided with first on first drain pipe 17
Drain regulating valve 16.
The effect of first drain regulating valve 16 is mainly when the vapour side of high-pressure heater 13 is run, by HP heater drainage
Oxygen-eliminating device 21 is drained into, and controls 13 vapour side water level of high-pressure heater, prevents 13 full water of high-pressure heater.When the utility model is put into
When work and when the water of water tank 4 enters high-pressure heater 13, the first drain regulating valve 16 of unlatching, which drains into water after cooling, to be removed
Oxygen device 21.
The second drain pipe 15, second drain pipe are also connected between the high-pressure heater 13 and the condenser 26
15, for the hydrophobic of the high-pressure heater 13 to be guided to the condenser 26, are provided with second on second drain pipe 15
Drain regulating valve 23.
The effect of second drain regulating valve 23 is mainly when 13 vapour side water level of high-pressure heater is higher than certain value, by high pressure
Heater 13 is hydrophobic to drain into condenser 26, prevents 13 full water of high-pressure heater from jeopardizing Turbine Safety.When the utility model is put into
When work, the accident water discharging valve that the second drain regulating valve 23 is run as 13 vapour side of high-pressure heater prevents high topped up with water.
Third shut-off valve 5 is provided between the water tank 4 and the hydrophobic development unit 8, the drain tank 9 gives up with described
The 4th shut-off valve 6 is provided between pond.
The effect of the third shut-off valve 5 mainly controls 4 water level of water tank in a certain range in the operation of boiler hygrometric state
It is interior, avoid separator water inlet or the dry pot of boiler.
The effect of 4th shut-off valve 6 mainly when boiler water quality is unqualified (500 μ g/L of Fe >), which passes through, opens this
The water of drain tank 9 is drained into wastewater disposal basin by valve, and when water quality reaches certain standard, (μ of Fe≤500 g/L) closes the 4th shut-off valve 6,
It cuts off and drains into wastewater disposal basin outside the water of drain tank 9.
The 5th shut-off valve 27, drainage pump 29 and the cooling tower are provided between the drainage pump 29 and the condenser 26
Between be provided with the 6th shut-off valve 28.
The water of pipeline drains into condenser after the effect of 5th shut-off valve 27 mainly closing isolation cutting drainage pump 29
26；The effect that 5th shut-off valve 27 is opened is that the water of conducting drainage pump 29 drains into condenser 26.When the utility model is normal
The first shut-off valve 11 or the second shut-off valve 19 are open when work, and the 5th shut-off valve 27 is to close.When first section
When only valve 11 or the second shut-off valve 19 are closed, the 5th shut-off valve 27 needs to open.
The effect of 6th valve 28 mainly reaches certain standard (200 μ g/L < Fe <, 500 μ g/ in boiler water quality
L the water of drain tank 9) is drained into cooling tower by drainage pump 29 by opening this valve afterwards, when water quality meets recycling standard (Fe <
200 μ g/L, the μ of turbidity≤3NTU, SiO2≤100 g/L) the 6th valve 28 is closed when i.e. the utility model is devoted oneself to work, it cuts
The water after drainage pump 29 that broken drains into cooling tower.
It is provided between the condensate pump 25 and the low-pressure heater 22 at the essence for removing boiler impurities in water
Manage device 24.
The operating process of this supercritical once-through boiler pipe-line system is as follows:
Ignition of the boiler and initial start stage, after the water of boiler water tank drains into hydrophobic development unit dilatation, cooling by valve 10
Into drain tank, the water of water quality (500 μ g/L of Fe >) not up to standard is drained into wastewater disposal basin by opening the 4th shut-off valve.When water quality reaches
To after certain standard (the 200 μ g/L < μ of Fe≤500 g/L), start a drainage pump, opens the 6th shut-off valve, closes the 4th cut-off
The water of drain tank is drained into cooling tower by valve.When boiler water quality qualification meets recycling standard (200 μ g/L of Fe <, turbidity≤3NTU, S
The μ of iO2≤100 g/L) after, it slowly opens the 5th shut-off valve, close the 6th shut-off valve, water is drained into the hot well of condenser, and pass through
5th cut-off valve regulation drain tank water level.Then the second shut-off valve is gradually opened, slowly opens the second regulating valve, and pass through second
Regulating valve control enters the water of oxygen-eliminating device, prevents oxygen-eliminating device superpressure, water tank is mentioned by the second communicating pipe to oxygen-eliminating device at this time
Heat and working medium recycling are realized in supplying heat source and water supply.After oxygen-eliminating device pressure reaches design value, the second hydrophobic adjusting is slowly opened
Valve, and put into high plus water level and automatically control, the first shut-off valve and the first regulating valve are then slowly opened, and pass through the first regulating valve
Control enters the water of high-pressure heater vapour side, prevents high-pressure heater vapour side superpressure.By slowly opening the first hydrophobic adjusting
It valve and closes the second drain regulating valve and simultaneously puts into water level automatic control, send high-pressure heater vapour side is hydrophobic to oxygen-eliminating device, at this time
Water tank provides heat source and water supply to oxygen-eliminating device and high-pressure heater by the first communicating pipe and the second communicating pipe, returns to greatest extent
Receive heat and working medium.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (6)
1. a kind of supercritical once-through boiler pipe-line system, which is characterized in that including water-cooling wall, separator, water tank, dewatering capacity-enlarging
Device, drain tank, wastewater disposal basin, cooling tower, condenser, low-pressure heater, oxygen-eliminating device, high-pressure heater, water supply station and economizer, institute
It states water-cooling wall and connects the separator, the separator connects the water tank, and is provided with escape pipe on the separator, institute
It states water tank and connects the hydrophobic development unit, the hydrophobic development unit connects the drain tank, and the drain tank is separately connected institute
Wastewater disposal basin is stated, the drain tank is provided with drainage pump, and the drainage pump is used to the water in the drain tank being delivered to cooling tower
And/or the condenser, condensate pump is connected between the condenser and the low-pressure heater, the low-pressure heater connects
The oxygen-eliminating device is connect, feed pump is connected between the oxygen-eliminating device and the high-pressure heater, the high-pressure heater connects institute
Water supply station is stated, the water supply station connects the economizer, and the economizer connects the water-cooling wall, the water outlet of the water tank
It was connected with for the first communicating pipe between the vapour side of the high-pressure heater, between the water outlet of the water tank and the oxygen-eliminating device
It was connected with for the second communicating pipe, the first shut-off valve and the first regulating valve, second communicating pipe is provided on first communicating pipe
On be provided with the second shut-off valve and the second regulating valve, the detection device for detecting boiler water quality is provided at the drain tank.
2. a kind of supercritical once-through boiler pipe-line system according to claim 1, which is characterized in that the high-pressure heater
The first drain pipe is also connected between the oxygen-eliminating device, first drain pipe is for leading the hydrophobic of the high-pressure heater
It is flow to the oxygen-eliminating device, is provided with the first drain regulating valve on first drain pipe.
3. a kind of supercritical once-through boiler pipe-line system according to claim 1, which is characterized in that the high-pressure heater
The second drain pipe is also connected between the condenser, second drain pipe is for leading the hydrophobic of the high-pressure heater
It is flow to the condenser, is provided with the second drain regulating valve on second drain pipe.
4. a kind of supercritical once-through boiler pipe-line system according to claim 1, which is characterized in that the water tank and institute
It states and is provided with third shut-off valve between hydrophobic development unit, the 4th shut-off valve is provided between the drain tank and the wastewater disposal basin.
5. a kind of supercritical once-through boiler pipe-line system according to claim 1, which is characterized in that the drainage pump and institute
It states and is provided with the 5th shut-off valve between condenser, the 6th shut-off valve is provided between drainage pump and the cooling tower.
6. a kind of supercritical once-through boiler pipe-line system according to claim 1, which is characterized in that the condensate pump and
The precision processing device for removing boiler impurities in water is provided between the low-pressure heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821139512.6U CN208967776U (en) | 2018-07-18 | 2018-07-18 | A kind of supercritical once-through boiler pipe-line system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821139512.6U CN208967776U (en) | 2018-07-18 | 2018-07-18 | A kind of supercritical once-through boiler pipe-line system |
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| CN208967776U true CN208967776U (en) | 2019-06-11 |
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| CN201821139512.6U Active CN208967776U (en) | 2018-07-18 | 2018-07-18 | A kind of supercritical once-through boiler pipe-line system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594821A (en) * | 2020-04-13 | 2020-08-28 | 中国能源建设集团广东省电力设计研究院有限公司 | Boiler desuperheating water device and method |
| WO2022011903A1 (en) * | 2020-07-16 | 2022-01-20 | 西安热工研究院有限公司 | Boiler wet water recovery system under low load of coal-fired unit and working method |
| CN114321874A (en) * | 2022-01-05 | 2022-04-12 | 国家能源集团国源电力有限公司 | Boiler starting system |
-
2018
- 2018-07-18 CN CN201821139512.6U patent/CN208967776U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594821A (en) * | 2020-04-13 | 2020-08-28 | 中国能源建设集团广东省电力设计研究院有限公司 | Boiler desuperheating water device and method |
| WO2022011903A1 (en) * | 2020-07-16 | 2022-01-20 | 西安热工研究院有限公司 | Boiler wet water recovery system under low load of coal-fired unit and working method |
| CN114321874A (en) * | 2022-01-05 | 2022-04-12 | 国家能源集团国源电力有限公司 | Boiler starting system |
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