CN107702358A - A kind of high temperature resistant solid-state heat reservoir steams water flushing method - Google Patents
A kind of high temperature resistant solid-state heat reservoir steams water flushing method Download PDFInfo
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- CN107702358A CN107702358A CN201710810492.4A CN201710810492A CN107702358A CN 107702358 A CN107702358 A CN 107702358A CN 201710810492 A CN201710810492 A CN 201710810492A CN 107702358 A CN107702358 A CN 107702358A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The present invention relates to solid-state energy storage domain technology field, more particularly to a kind of high temperature resistant solid-state heat reservoir steams water flushing method, this method, including the addition water lasting into the pipeline of solid-state heat-storage medium, and control the water temperature for adding water to gradually rise, realize that the synchronous progress of water is steamed in flushing of pipeline and solid-state heat-storage medium heat exchange heating；After solid-state heat-storage medium is warming up to design temperature, stop plus water operation, it is lasting into the pipeline of solid-state heat-storage medium to be passed through high-temperature steam, continue to carry out heating drying operation to solid-state heat-storage medium.Using this method, first water flowing, then logical steam, when being passed through high-temperature steam, solid-state heat-storage medium is risen certain temperature by water extraction, then is not in the situation that solid-state heat-storage medium is drastically heated and ftractureed when being passed through high-temperature steam, avoids solid-state heat-storage medium from damaging；Meanwhile when water flowing carries out steaming water to solid-state heat-storage medium, water can be also rinsed to pipeline, the impurity in pipeline can be rinsed discharge, be created conditions for follow-up purging.
Description
Technical field
The present invention relates to solid-state energy storage domain technology field, more particularly to a kind of high temperature resistant solid-state heat reservoir to steam water and rinse
Method.
Background technology
The advantage of solar light-heat power-generation is that it can avoid the silicon wafer opto-electronic conversion technique of costliness, can substantially reduce
The cost of solar power generation, furthermore, it is possible to the heat energy of solar energy conversion is stored, even after the sun sets, or it is overcast and rainy
Under weather environment, remain to continue to generate electricity.
The heat accumulation tower at solar light-heat power-generation station is a kind of heat accumulation module for being used to store heat energy.During energy storage, to heat accumulation
Vapours is passed through in tower, vapours completes heat exchange by being restrained in heat accumulation tower with heat-storage medium (concrete), discharges condensed water；
During energy supply, water is passed through into heat accumulation tower, water and the heat energy of storage in heat accumulation tower occur heat exchange, finally discharges vapours.
As a kind of conventional heat-storage medium, the heat accumulation module at solar light-heat power-generation station has obtained widely concrete
Using its structure is to penetrate pipeline in concrete, fin is set on the outer wall of pipeline, fin contacts with concrete, in use, hot
Steam is passed into pipeline, vapours is completed heat exchange with concrete by fin auxiliary.
Wherein, heat accumulation module is easily retaining gravel, welding slag and corrosion during manufacture, transport, keeping, installation etc. in pipeline
The various impurity such as product, need to be cleared up before use, meanwhile, concrete is before formal come into operation, it is also necessary to is dried
Processing, dry Main Means are to make its heating, make (300 DEG C of free water (100-110 DEG C of evaporation) and the crystallization water in concrete
More than separate out) loss, avoid use when concrete temperature it is too low and it is moist drastically be heated after expand inequality cause concrete cracking.
At present, above-mentioned two operations be separate operations, during flushing, are passed through hot water into the pipeline of concrete, pass through water general
Impurity in pipeline is gone out；When drying, high-temperature gas is passed through into pipeline, gas temperature typically at 420-480 DEG C or so, passes through
High-temperature gas carries out heat exchange with concrete, reaches dry purpose.Above-mentioned two steps separate operations, waste time and energy, Er Qieyou
Initial temperature when concrete is being dried is relatively low, is 20 DEG C or so, and generally, the temperature of concrete exists after drying
300-450 DEG C, front and rear temperature span is larger, and concrete is rapidly heated in drying process, easily causes concrete cracking, so as to shadow
Ring the normal use of heat accumulation tower.
The content of the invention
The invention provides a kind of high temperature resistant solid-state heat reservoir to steam water flushing method, and its object is to can realize solid-state
The flushing of heat-storage medium is carried out simultaneously with steaming water, first carries out steaming water to solid-state heat-storage medium using the water progressively to heat up, then be passed through
High-temperature steam can avoid solid-state heat-storage medium from ftractureing.
To achieve these goals, technical scheme is as follows：
A kind of high temperature resistant solid-state heat reservoir steams water flushing method, comprises the following steps：
The lasting addition water into the pipeline of solid-state heat-storage medium, and control the water temperature for adding water to gradually rise, realize institute
State flushing of pipeline and the synchronous progress of water is steamed in the heat exchange of solid-state heat-storage medium；
Complete the water after flushing and heat exchange steaming water and the solid-state heat-storage medium is discharged by the line end；
After the solid-state heat-storage medium is warming up to design temperature, stops plus water operates, to the solid-state heat-storage medium
It is lasting in pipeline to be passed through high-temperature steam, continue to carry out heating drying operation to the solid-state heat-storage medium.
Further, the solid-state heat-storage medium is concrete, solid salt, ceramics, solid-state sand
Further, the solid-state heat-storage medium is concrete, and the water added into the pipeline of the concrete is by described
The top layer of concrete adds, and is discharged after completing flushing and heat exchange steaming water by the bottom of the concrete, adds the initial temperature of water
Temperature of the degree higher than the concrete of top.
Further, the concrete is warming up to design temperature as the described of layer where steam-water separator in the concrete
Concrete temperature reaches after 200-300 DEG C.
Further, the temperature range for adding water is 80-270 DEG C, and the temperature range for being passed through steam is 350-480 DEG C.
Further, during the drying operation, when the temperature of the concrete of bottommost reaches 270 DEG C drying operation stop
Only.
Further, the water added in the pipeline of the concrete steam as caused by the Sun Island of power station carries out heat exchange liter
Temperature, the interior steam added of pipeline of the concrete is steam caused by the Sun Island of power station.
Further, build temporary system, temporary system includes high pressure heat exchanger, high pressure heat exchanger by interim pipeline with
Thermal-arrest water circulating pump and the steam output circuit connection in power station；
Using steam caused by the water of the thermal-arrest cyclic water tank in power station and power station the Sun Island in the high pressure heat exchange of temporary system
Exchanged heat in device, the line upper portion of the high pressure heat exchanger to heat accumulation tower concrete adds the high-temperature water after heat exchange.
Further, the water of concrete base discharge is reclaimed, the thermal-arrest for being delivered to power station after filtering follows
Ring water tank.
Further, when adding the temperature of water in 100-110 DEG C of section, the water of this temperature range is in the concrete
72-168 hours are stopped in pipeline, afterwards, the concrete are sampled, carrying out drying to sample weighs.
From above technical scheme, the high temperature resistant solid-state heat reservoir in the application steams water flushing method, mainly includes
Two steps, the first step first add water into the pipeline of solid-state heat-storage medium, and there is water certain temperature to be sent out with solid-state heat-storage medium
Heat exchanges, and goes out the water evaporation in solid-state heat-storage medium；Wherein, the constant temperature lifting of water is added so that solid-state heat accumulation is situated between
The temperature of matter also gradually steps up, and is finally reached the purpose that water is steamed to solid-state heat-storage medium, meanwhile, lasting adds water, and water is in pipeline
Interior flowing, impurity present in pipeline can be taken away, reach the purpose of flushing；Afterwards, pipe of the second step to solid-state heat-storage medium
Steam is passed through in road, the temperature of steam is higher, and further solid-state heat-storage medium is carried out to steam water drying.
Using this method, due to being first water flowing, then the steaming water drying mode of logical steam, when being passed through high-temperature steam, solid-state storage
Thermal medium is risen certain temperature by water extraction, and the steaming water for having carried out a period of time is dried, therefore, then when being passed through high-temperature steam not
The situation for occurring solid-state heat-storage medium to be drastically heated and ftractureing, solid-state heat-storage medium is avoided to damage；Meanwhile in water flowing to solid-state
When heat-storage medium carries out steaming water, pipeline can be also rinsed, the impurity in pipeline can be rinsed discharge, be created for follow-up purging
Make condition.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also be obtained according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the flow chart for the embodiment one that heat accumulation tower provided by the invention steams water flushing method；
Fig. 2 is the flow chart for the embodiment two that heat accumulation tower provided by the invention steams water flushing method.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Whole description, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The steaming water flushing method provided in present embodiment, drying behaviour can be carried out to the solid-state heat-storage medium of heat-storing device
Make, by the way of water is combined with steam phase, heating progressively can be carried out to solid-state heat-storage medium, specifically, a kind of high temperature resistant
Solid-state heat reservoir steams water flushing method, comprises the following steps：
The lasting addition water into the pipeline of solid-state heat-storage medium, and control the water temperature for adding water to gradually rise, realize institute
State flushing of pipeline and the synchronous progress of water is steamed in the heat exchange of solid-state heat-storage medium；
Complete the water after flushing and heat exchange steaming water and the solid-state heat-storage medium is discharged by the line end；
After the solid-state heat-storage medium is warming up to design temperature, stops plus water operates, to the solid-state heat-storage medium
It is lasting in pipeline to be passed through high-temperature steam, continue to carry out heating drying operation to the solid-state heat-storage medium.
Preferably, the solid-state heat-storage medium is concrete, solid salt, ceramics, solid-state sand.Following two embodiments are with solid
State heat-storage medium be concrete exemplified by, specifically：
Embodiment one comprises the following steps as shown in figure 1, a kind of high temperature resistant solid-state heat reservoir steaming water flushing method：
The lasting addition water into the pipeline of heat accumulation tower concrete, and control the water temperature for adding water to gradually rise, realize institute
State flushing of pipeline and the concrete heat exchanges the synchronous progress for steaming water；
Complete the water after flushing and heat exchange steaming water and the heat accumulation tower is discharged by the line end；
After concrete is warming up to design temperature, stops plus water operates, it is lasting into the pipeline of heat accumulation tower concrete to lead to
Enter high-temperature steam, continue to carry out heating drying operation to the concrete.
Concrete is warming up to design temperature, and the concrete temperature of layer reaches 200- where steam-water separator in heat accumulation tower
After 300 DEG C.The purpose of water flowing it is concrete is progressively heated up in the pipeline of concrete, avoids the unexpected high temperature of concrete and ftracture,
After the concrete of layer where steam-water separator is warming up to 200-300 DEG C, generally 14 layers, stops water flowing operation, switch to
Logical steam.
As preferred embodiment, during operation, the water/steam added into the pipeline of the heat accumulation tower concrete is by institute
The top layer for stating heat accumulation tower is added, and water/steam is discharged by the bottom of the heat accumulation tower after completing flushing and heat exchange steaming water, adds water
Initial temperature higher than the concrete of top in the heat accumulation tower temperature.
Preferably, the temperature range for adding water is 80-270 DEG C, and the temperature range for being passed through steam is 350-480 DEG C.
When heat accumulation top of tower concrete temperature is below 55 DEG C, the temperature that control adds water is no more than 80 DEG C, with holding
Continuous plus water, after heat accumulation top of tower temperature is more than 55 DEG C, control enters heat accumulation tower water temperature and existed with heat accumulation tower top layer temperature difference
Within 25 DEG C；Add water controlled by feed pump, after heat accumulation top of tower concrete temperature is more than 80 DEG C, control feed pump according to
Water flow velocity is more than 1.5m/s flow velocity power outputs in every pipeline, to ensure that heat accumulation tower adds water, row's outlet effect, developing result
And heating rate stabilization and relative equilibrium.
It is passed through steam to continue to continue drying operation to concrete, when the temperature of the concrete of heat accumulation tower bottommost reaches
Drying operation stops at 270 DEG C.The concrete structure of heat accumulation tower includes sandwich construction, generally 18 layers, in two steps, high-temperature water
And steam is passed through by top, bottom discharge, during water is steamed in water/steam fluid interchange, heat exchange is successively completed, bottom
Temperature is less than head temperature, therefore, when bottom temp reaches 270 DEG C, can infer accordingly, the temperature at top is above
270 DEG C, therefore, it can only monitor the concrete temperature of bottommost.
Embodiment two as shown in Fig. 2 for adding water and steam in concrete pipeline, can external equipment lasting rise is provided
Warm water and steam, or, using the existing structure in power station, to provide persistently overheating water and steam.
Specifically, building temporary system, temporary system includes high pressure heat exchanger, and high pressure heat exchanger passes through interim pipeline and electricity
Thermal-arrest water circulating pump and the steam output circuit connection stood；
Using steam caused by the water of the thermal-arrest cyclic water tank in power station and power station the Sun Island in the high pressure heat exchange of temporary system
Exchanged heat in device, the high pressure heat exchanger adds the high-temperature water after heat exchange to heat accumulation tower concrete line upper portion.
Water in thermal-arrest cyclic water tank is delivered to high pressure heat exchanger by the thermal-arrest water circulating pump in power station, caused by Jing Chang heat absorptions
High-temperature steam is delivered to high pressure heat exchanger, water and steam heat-exchanging in high pressure heat exchanger, after water heating discharge be delivered to heat accumulation tower
The top of concrete pipeline.Wherein, by adjusting the temperature of the water in thermal-arrest cyclic water tank, it is high to can adjust high pressure heat exchanger output
The water temperature of warm water.
Temporary system is passed through before water into concrete, it is necessary to which high pressure heat exchanger and corresponding pipeline to temporary system enter
Row exhaust, flushing are handled, and air bleeding valve and hydrophobic valve are included on the pipeline of temporary system, when being vented, rinsing processing, by air bleeding valve
And hydrophobic valve is opened, with minimum frequency water flowing into high pressure heat exchanger and connected pipeline, band air bleeding valve has continuously
Air bleeding valve, the transparent rear closing of water bleach of hydrophobic valve discharge are closed after water droplet, while stops supplying water.This excessively in, interim pipe
Pressure in road is no more than 4MPa.
Water can be added into the pipeline of concrete after pump-down process, the lasting addition into the pipeline of heat accumulation tower concrete
Water, and control the water temperature for adding water to gradually rise, realize that the flushing of pipeline and the concrete heat exchange the same stepping for steaming water
OK；
Complete the water after flushing and heat exchange steaming water and the heat accumulation tower is discharged by the line end；
After concrete is warming up to design temperature, stops plus water operates, it is lasting into the pipeline of heat accumulation tower concrete to lead to
Enter high-temperature steam, continue to carry out heating drying operation to the concrete.
Heat accumulation tower includes more modules, and every module includes multilayer, for example, heat accumulation tower is made up of 6 modules, every module
It is homogeneous intercommunicated between each layer, each seat including 18 layers.
In the concrete pipeline in the state of full water, its internal pressure is 4-5MPa.If in use, in heat accumulation tower
Water foot, the sewage draining exit of 6 heat accumulation towers can be opened simultaneously, if water shortage, sewage draining exit alternation switch, and the unlatching of sewage draining exit
Time is essentially identical.Wherein, pressure in heat accumulation tower can be kept to refer to interior proof water foot in scope, it is on the contrary then belong to water not
Foot.
The blowdown flow rate of heat accumulation tower single seat tower is not less than 85t/h, and during 6 blowdowns simultaneously, total amount of pollutants discharged be not less than 510t/h, guarantor
Water flow velocity is not less than 1.5m/s in card heat accumulation tower.
Further preferred technical scheme, the water of heat accumulation tower bottom discharge is reclaimed.Heat accumulation tower flushing process
In, early stage, the water of heat accumulation tower sewage draining exit discharge was more muddy, and after a period of time, the water of sewage draining exit discharge can be gradually limpid, works as row
When the water gone out reaches certain standard, recoverable, the wasting of resources is avoided, it is cost-effective.Preferably, periodically to the heat accumulation
The water of tower bottom discharge is acquired and chemically examined, and e.g., at interval of 2 hours, once gather, chemically examines, when chlorine in the water of discharge
When ion concentration is less than 25ppm and all iron content and is less than 50mg/L, recycled to discharging water.
Meanwhile heat accumulation tower discharge recycling Water Sproading into thermal-arrest cyclic water tank so that heat accumulation tower, collection thermal cycle
Water tank and high pressure heat exchanger form a closed cycle structure.Controlled by controlling loop quantity and the control mode of Jing Chang inputs
Into the quantity of steam of high pressure heat exchanger, while the input quantity and frequency of domination set thermal cycle water pump, realize from high pressure heat exchanger
Outlet has larger internal circulating load simultaneously into the water temperature of heat accumulation tower higher than heat accumulation tower temperature of top, to ensure the water in heat accumulation tower
Flow velocity is enough, in the case that the flow velocity in heat accumulation tower is enough, beneficial to the samming that concrete in heat accumulation tower is overall, avoids top and bottom
The temperature difference in portion is larger.
In embodiment one and embodiment two, lasting addition water is rinsed, steam water during, when the temperature for adding water
At 100-110 DEG C of section, the water of this temperature range stops 72-168 hours (3-7 days) in the pipeline of the concrete, it
Afterwards, the concrete is sampled, carrying out drying to sample weighs.Mainly evaporated in primary steaming water drying stage mixed
Free water in solidifying soil, wherein, therefore the temperature range for water evaporation of dissociating, is stopped between 100-110 DEG C in this temperature range
The time of abundance is stayed, free water evaporation can be made abundant.
Wherein, specific sample mode is the sample for gathering the concrete two edges and middle part, gathers the weight of sample
Not less than 30g, drying heating-up temperature is not less than 600 DEG C.(crystallization water contains in concrete for the gross weight reduction 6% of sample after heating
Amount about 6%) within be considered as it is qualified.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes can be being carried out without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (10)
1. a kind of high temperature resistant solid-state heat reservoir steams water flushing method, it is characterised in that comprises the following steps：
The lasting addition water into the pipeline of solid-state heat-storage medium, and control the water temperature for adding water to gradually rise, realize the pipe
Road is rinsed and the heat exchange of solid-state heat-storage medium is steamed the synchronous of water and carried out；
Complete the water after flushing and heat exchange steaming water and the solid-state heat-storage medium is discharged by the line end；
After the solid-state heat-storage medium is warming up to design temperature, stops plus water operates, to the pipeline of the solid-state heat-storage medium
It is interior it is lasting be passed through high-temperature steam, continue to carry out heating drying operation to the solid-state heat-storage medium.
2. high temperature resistant solid-state heat reservoir according to claim 1 steams water flushing method, it is characterised in that the solid-state storage
Thermal medium is concrete, solid salt, ceramics, solid-state sand.
3. high temperature resistant solid-state heat reservoir according to claim 2 steams water flushing method, it is characterised in that the solid-state storage
Thermal medium is concrete, and the water/steam added into the pipeline of the concrete is added by the top layer of the concrete, completes punching
Wash and heat exchange steam water after water/steam by the concrete bottom discharge, add water initial temperature be higher than top institute
State the temperature of concrete.
4. high temperature resistant solid-state heat reservoir according to claim 3 steams water flushing method, it is characterised in that the concrete
The concrete temperature that design temperature is warming up to as layer where steam-water separator in the concrete reaches 200-300 DEG C.
5. high temperature resistant solid-state heat reservoir according to claim 3 steams water flushing method, it is characterised in that adds the temperature of water
It is 80-270 DEG C to spend scope, and the temperature range for being passed through steam is 350-480 DEG C.
6. high temperature resistant solid-state heat reservoir according to claim 5 steams water flushing method, it is characterised in that the drying behaviour
When making, the drying operation stopping when the temperature of the concrete of bottommost reaches 270 DEG C.
7. high temperature resistant solid-state heat reservoir according to claim 5 steams water flushing method, it is characterised in that the concrete
Pipeline in water steam as caused by the Sun Island of power station for adding carry out heat exchange heating, added in the pipeline of the concrete
Steam is steam caused by the Sun Island of power station.
8. high temperature resistant solid-state heat reservoir according to claim 7 steams water flushing method, it is characterised in that builds interim system
System, temporary system include high pressure heat exchanger, and high pressure heat exchanger is defeated by the thermal-arrest water circulating pump and steam in interim pipeline and power station
Go out pipeline connection；
Using steam caused by the water of the thermal-arrest cyclic water tank in power station and power station the Sun Island in the high pressure heat exchanger of temporary system
Exchanged heat, the high pressure heat exchanger adds the high-temperature water after heat exchange to heat accumulation tower concrete line upper portion.
9. high temperature resistant solid-state heat reservoir according to claim 8 steams water flushing method, it is characterised in that to the coagulation
The water of native bottom discharge is reclaimed, and is delivered to the thermal-arrest cyclic water tank in power station after filtering.
10. high temperature resistant solid-state heat reservoir according to claim 5 steams water flushing method, it is characterised in that when addition water
Temperature at 100-110 DEG C of section, the water of this temperature range stops 72-168 hours in the pipeline of the concrete, it
Afterwards, the concrete is sampled, carrying out drying to sample weighs.
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| CN201710810492.4A CN107702358B (en) | 2017-09-11 | 2017-09-11 | Method for flushing high-temperature-resistant solid heat storage system by evaporating water |
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| CN201710810492.4A CN107702358B (en) | 2017-09-11 | 2017-09-11 | Method for flushing high-temperature-resistant solid heat storage system by evaporating water |
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| CN107702358B CN107702358B (en) | 2020-03-31 |
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| CN107702358B (en) | 2020-03-31 |
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