CN110486958A - Slot type photo-thermal power station fused salt injection technology - Google Patents
Slot type photo-thermal power station fused salt injection technology Download PDFInfo
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- CN110486958A CN110486958A CN201910491701.2A CN201910491701A CN110486958A CN 110486958 A CN110486958 A CN 110486958A CN 201910491701 A CN201910491701 A CN 201910491701A CN 110486958 A CN110486958 A CN 110486958A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
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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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Abstract
The invention discloses slot type photo-thermal power station fused salt injection technologies, comprising the following steps: the step of preparing before note salt；The step of sloppy heat salt cellar preheats；The step of fused salt melts；Sloppy heat salt cellar infuses the step of salt and displacement of cold tank nitrogen；The step of heating salt cellar preheating；The step of oily salt heat exchanger note salt；The step of heating salt cellar note salt；The step of heating the displacement of salt cellar nitrogen, it is identical as sloppy heat salt cellar, after heating salt and filling, start nitrogen displacement.The present invention is according to unit installed capacity while comprehensively considering the special physical characteristic of fused salt, entire operation process is injected to fused salt and control measure are optimized, the control of control, fused salt and equipment room rate of heat transfer including temperature, the optimization of process, to ensure that quick, the safety of fused salt injection.
Description
Technical field
The invention belongs to slot type photo-thermal power station technical field, in particular to a kind of slot type photo-thermal power station fused salt injection technology.
Background technique
In recent years, with the development and utilization of new energy, solar light-heat power-generation technology is continuously available popularization and application, wherein
With the most widely used of slot type photo-thermal power station.Fused salt is low with its fusing point, temperature upper limit is high, heat transfer efficiency is high, heat transfer is stable simultaneously,
The good feature of thermal storage performance is increasingly becoming the main heat-storage medium of slot type photo-thermal power station project, and is gradually being situated between to heat absorption heat accumulation
The trend of matter development.And fused salt has 238 DEG C of higher crystalline temperature, therefore how to do the control in fused salt injection process to temperature
System and process optimization become the problem of urgently researching and solving.
Summary of the invention
In view of the deficienciess of the prior art, the present invention provides a kind of slot type photo-thermal power station fused salt injection technology, according to machine
Kludge capacity comprehensively considers the special physical characteristic of fused salt simultaneously, injects entire operation process and control measure to fused salt
It is optimized, control (temperature of fused salt and the temperature for storing equipment), fused salt and equipment room rate of heat transfer including temperature
Control, the optimization of process, to ensure that quick, the safety of fused salt injection.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that:
Slot type photo-thermal power station fused salt injection technology, comprising the following steps:
A. the step of preparing before note salt；
B. the step of sloppy heat salt cellar preheats；
C. the step of fused salt melts；
D. the step of sloppy heat salt cellar note salt and cold tank nitrogen are replaced, including with the next stage, infuse salt to electric heater and start liquid
Position starts electric heater；Salt is infused to fused salt pump startup liquid level, starts pump for liquid salts, passes through recirculation conduit and fused salt distribution duct
Carry out self-loopa；Salt is persistently infused to highest liquid level；After the completion of sloppy heat salt cellar infuses salt, with residual gas in nitrogen displacement tank；
E. the step of heating the step of salt cellar preheats, preheating with sloppy heat salt cellar is identical；
F. the step of oily salt heat exchanger note salt, including oily salt heat exchanger and the displacement of salt discharge tank nitrogen；Oily salt heat exchanger preheating
And oiling；Oily salt heat exchanger infuses salt；
G. the step of hot melt salt cellar note salt is identical as sloppy heat salt cellar note salt step；
H. the step of hot melt salt cellar nitrogen displacement, it is identical as sloppy heat salt cellar, after heating salt and filling, start nitrogen displacement.
Further, step a infuse salt before prepare the step of include infuse salt job instruction work out and examine pass through,
The personnel of all participation note salt work need to know each details of operation and every safety notice, all participations infuse salt
Auxiliary device debugging finish and in place, confirmation reach note salt condition.
Further, step b sloppy heat salt cellar preheat the step of include pre-heating device arrangement, pipeline connection, pre-heating system from
Dynamic the step of adjusting preheating.
Further, pre-heating system automatically adjusts the air and gas flow for entering burner and will be with hot combustion gas
Mixed air reaches 200 DEG C -600 DEG C before entering tank；The thermocouple of real-time monitoring salt cellar each position in warm,
Ensure that each position temperature uniformly rises in salt cellar, and guarantees temperature in early warning range；Temperature reaches 350 DEG C -370 DEG C in tank,
Preheating is completed, and pre-heating device is stopped, and burner extinguishes, and blower remains in operation 10 minutes cooled-preheated equipment, and closing valve prevents
Hot air reflow to equipment, injecting compressed air cools down equipment.
Further, the step of step c fused salt melts includes pre-stored solid-state fused salt, the crushing of solid salt and transmission, enters
Furnace preheating, fuse salt transfer, the fused salt liquid level after thawing will be added with the solid-state fused salt continually entered and increase liquid level, fuse salt
The transfer tank that preheating is completed is flowed by overflow line, until liquid level reaches defeated salt pump startup liquid level, starts to continuously run note
Salt.
Further, the crushing of solid salt and transmitting step include,
Mixing match: 60% sodium nitrate and 40% sodium nitrate, will according to the ratio of 3:2 simultaneously in two preprocessors
Upper progress feeding and crushing, two adhesive tape drive end units connecting with smelting furnace are furnished with electronic scale, and weighing information will be delivered to smelting furnace
PLC is calculated, and the running speed of every sealing-tape machine is controlled by PLC, reaches preset mixed proportion requirement.
It is broken to open bag: solid salt is maneuvered into the included lifting elevator region of sealing-tape machine by storage area through fork truck, via skin
Crane with conveyer will be promoted at the solid salt of bag and be caught broken machine top automatically, open bag by the operation completion of operator；
The salt of solid agglomerates, which will be carried out squeezing by the fixture of chunk breaker, completes preliminary be crushed；
Transmission: the pulverizer that broken bulk particle falls into bottom is crushed, and the solid salt through crushing qualified is fallen into
Sealing-tape machine；
Dedusting: the dust that broken and transmission generates will be adsorbed by the deduster for being arranged in end and again return to sealing-tape machine
On.
Further, oily salt heat exchanger nitrogen displacement step is specifically in step f: oily salt heat exchanger N2 entrance door is opened,
N2 is injected into oily salt heat exchanger, while opening oily salt heat exchanger exhaust outlet to salt discharge tank, detection salt discharge tank exports oxygen concentration,
Until no oxygen is discharged, as displacement is completed；The displacement of salt discharge tank nitrogen is identical as oily salt operation of heat exchanger；
Oily salt heat exchanger preheating and oiling step are specifically: oily salt heat exchanger preheating is heated to about 290 DEG C through electric tracing；Oil
Salt heat exchange temperature reaches with after conduction oil permission temperature difference (first conduction oil injects about 300 DEG C of temperature), starts filling heat-conductive
Oil；When oily salt heat exchanger outlet temperature is close or slightly above cold salt cellar in temperature of molten salt (292 DEG C of cold salt cellar temperature of molten salt) after, i.e.,
Meet note salt requirement；
Oily salt heat exchanger note salt step is specifically: opening a pump for liquid salts, and to be adjusted to minimum speed, while opening out
Mouth valve 10%, slowly infuses salt, after fused salt manifold pressure rises, Open valve 20%-25%；It is vented to oily salt heat exchanger
When mouth electric thermo-couple temperature shows 265-350 DEG C, represents oily salt heat exchanger and filled salt；Salt pump is continuously run at this time, it will be through exchanging heat
The salt of the heating of device injects hot tank.
Compared with prior art, the invention has the advantages that:
According to unit installed capacity while comprehensively considering the special physical characteristic of fused salt, whole operation stream is injected to fused salt
Journey and control measure are optimized, and control including temperature (temperature of fused salt and the temperature for storing equipment), fused salt and set
The control of rate of heat transfer, the optimization of process between standby, to ensure that quick, the safety of fused salt injection.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
Fig. 2 is chimney arrangement schematic diagram of the invention；
Fig. 3 is pre-heating device arrangement schematic diagram；
Fig. 4 is salt cellar preheated air type of flow schematic diagram；
Fig. 5 is that fused salt pre-processes and inject schematic diagram.
In figure, 1. chimneys；2. negative throat noz(zle)；3 fused salt tanks.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is further illustrated.
Material and equipment required for the present invention are the prior art, its known structure of those skilled in the art and user
Method, main material and equipment are shown in Table 1.
1 material of table and equipment list
Lower mask body introduces slot type photo-thermal power station fused salt injection technology of the present invention, comprising the following steps:
One, prepare before infusing salt
The preparation of note salt is mainly started in terms of people, machine, material, method, five, ring, and the job instruction including infusing salt is compiled
System complete and examine pass through, all personnel for participating in note salt work need to know each details and every secure attention thing of operation
, it is all participate in note salt auxiliary device debugging finish and in place, confirmation reach note salt condition.
Infuse salt condition:
1. fused salt tank is completed according to drawing construction, the water pressure test is qualified, and internal cleaning is completed, and heat preservation is completed；
2. fused salt subsystem (pump for liquid salts, tank bottom ventilation, interim preheater, electric heating, heat tracing, temperature liquid level pressure prison
Control system is installed and debugs completion)；
3. nitrogen, compressed air, industrial water system are available；
4. interim fused salt pretreatment system construction, debugging are completed；
5. interim molten salt furnace and transportation system construction debugging are completed；
6. temporary fuel system venting and debugging completion.
Two, sloppy heat salt cellar preheats
It summarizes: before (350 DEG C -370 DEG C) of the fused salt cold salt cellars of injection after high temperature melt, it is necessary to be carried out to cold salt cellar pre-
Heat prevents salt from crystallizing, and same warm must be slow, guarantees that the temperature of each section is almost the same, and each point temperature difference is no more than 25
DEG C, maximum temperature is no more than 400 DEG C of the design temperature (- 20) of salt cellar, and the thermal stress of tank body is no more than the limit.
Specifically includes the following steps:
1. pre-heating device is arranged
Salt cellar pre-heating device specifically includes that burner, exhaust pipe Pneumatic butterfly valve, negative throat noz(zle)Chimney (low-temperature flue gas discharge).
Burner (mixture that fuel is propane and butane each 50%) should include blower, exhaust pipe, and it is flat to be placed on salt pump
On platform；2 distal center line of negative throat noz(zle) is in vertical direction with 45 degree of angles, with tank skin tangent line at 60 degree when negative throat noz(zle) 2 is installed
Angle, to guarantee that the aerodynamic field control technology that flue gas each section temperature in fused salt tank 3 slowly uniformly rises is realized.Chimney
1 bottom is provided withHole.Chimney and layout drawing are detailed in Fig. 2 and Fig. 3, and the salt cellar preheated air type of flow is shown in Fig. 4.
2. pipeline connects
All pipelines of salt cellar relevant connection must be blocked with blind plate, and valve must be isolated for the pipeline for connecting completion, really
Protect the tight No leakage of all isolating points.
3. pre-heating system automatic adjustment preheating
(1) pre-heating system ignition temperature is up to 600 DEG C, in order not to make excessively high hot gas enter salt cellar, can pass through equipment
PLC adjust and burner and inject a certain amount of fresh air to control.
(2) pre-heating system automatic adjustment enters the air and gas flow of burner and will mix with hot combustion gas
Air, to reach suitable temperature (200 DEG C -600 DEG C) before entering tank；
(3) in warm real-time monitoring salt cellar each position thermocouple, it is ensured that each position temperature uniformly rises in salt cellar,
And guarantee temperature (each measuring point temperature difference ≯ 25 DEG C) in early warning range；
(4) (temperature reaches 350 DEG C -370 DEG C in tank) is completed in preheating, stops pre-heating device, and burner extinguishes, and blower continues
10 minutes cooled-preheated equipment is operated, butterfly valve closing prevents hot air reflow to equipment, the cooling equipment of injecting compressed air.
The ignition temperature of pre-heating system is up to 600 DEG C, and capacity is about 2000-16000m3/ h, in 12 days (~280h)
Temperature reaches 320-350 DEG C in tank later, and temperature rise rate need to be controlled in 1~1.2 DEG C/h, maximum no more than 3 DEG C/h.
Real-time monitoring in the process:
A, the adjacent thermoelectric maximum of tank skin is no more than 25 DEG C
B, the adjacent thermoelectric maximum of tank deck is no more than 25 DEG C
C, the temperature difference maximum of all thermocouple any two of tank bottom is no more than 35 DEG C
D, the temperature difference maximum of all thermocouple any two of tank deck is no more than 35 DEG C
E, the temperature difference maximum of all thermocouple any two is no more than 60 DEG C in entire tank
All thermocouples are no more than 400 DEG C of design temperature in tank
F, pressure inside the tank is no more than design pressure 20mbar
Note: temperature difference protection is can to adjust burner simultaneously by the PLC of equipment in order not to make excessively high hot gas enter salt cellar
A certain amount of fresh air is injected to control.Pre-heating system can automatically adjust into burner air and gas flow and
The air that will be mixed with hot combustion gas, to reach suitable temperature before entering tank.
Three, fused salt melts
After fused salt arrival be solid granulates, need to through smashing to pieces and high temperature melt (350 DEG C -370 DEG C) after, through pump by infuse salt
Pipeline injects salt cellar.It includes the equipment such as solids disposal facilities, thawing apparatus, transfer tank that salt, which melts system,.Solids disposal facilities are
Solid salt is delivered to a small funnel by a series of salt that conveyer belts screen, it is ensured that salt flows into smelting furnace.It is true
Guarantor, which melts salt furnace, continuously solid salt input, and 3 set of 100% capacity solid fused salt is arranged and handles line (2 fortune one are standby), at 2
Salt adhesive tape conveying machine (each one of potassium nitrate, sodium nitrate) after reason.The device also has bag-type dusting filter, is responsible for collecting
The dust that two lines generate, and return to system.Thawing apparatus is made of one 25 cubic metres of molten salt furnace, and is furnished with 12
Gas regulation burner, hot gas is oriented to its bottom by container inside by some pipelines, and is extracted out by side chimney.It has melted
Salt pass through the overflow port overflow of stove to transfer tank.Shift tankage size 9m3, the salt after thawing enters after transfer tank through one
25m3The pump of/h is delivered to the fused salt tank having had been warmed up.(equipment used in process is existing equipment)
1. it includes: solids disposal facilities (lifting device, crushing device, filtering recovering device (bag-type dust that salt, which melts equipment,
Device), transmission device, thawing apparatus (melting furnace, control cabinet, blender, fuel (propane) holding vessel, chimney), fused salt surge tank
(melting tank, defeated salt pump, pollution discharge pond).Salt melts system power output in 25t/h-30t/h.
Fused salt injects process as shown in Figure 5, and solid salt pretreatment-thawing-surge tank-is pumped into fused salt tank --- blowing out
Blowdown.
2. operating procedure
(1) pre-stored solid-state fused salt.
(2) crushing and transmission of solid salt
Component part: solid salt treatment workshop by 3 salt preprocessors (elevator, bag-opening machine bulk hydraulic breaker and
Rotary drum grinder composition) and 2 sealing-tape machine compositions, it is standby that salt preprocessor 2 transports 1.
Mixing match: 60% sodium nitrate and 40% sodium nitrate, will be according to the ratio of 3:2 (3 bags of sodium nitrate, 2 bags of nitric acid
Potassium, every bag of 1.2t) feeding and crushing are carried out on two preprocessors simultaneously.Two adhesive tape drive end units connecting with smelting furnace are furnished with
Electronic scale, the PLC that weighing information will be delivered to smelting furnace are calculated, and the running speed of every sealing-tape machine is controlled by PLC, reach pre-
If mixed proportion requirement.
It is broken to open bag: solid salt is maneuvered into the included lifting elevator region of sealing-tape machine by storage area through fork truck, via skin
Crane with conveyer will be promoted at the solid salt of bag (1.2t) and be caught broken machine top automatically, be completed by the operation of operator
Open bag (cracking bottom)；The salt of solid agglomerates, which will be carried out squeezing by the fixture of chunk breaker, completes preliminary be crushed.
Transmission: the pulverizer that broken bulk particle falls into bottom is crushed, and the solid salt through crushing qualified is fallen into
Sealing-tape machine.
Dedusting: the dust that broken and transmission generates will be adsorbed by the deduster for being arranged in end and again return to sealing-tape machine
On.
(3) enter furnace preheating: broken solid salt enters melting furnace laser heating to 380 DEG C, to guarantee that smelting furnace is completely equal
It is even heated, after the completion of above step, fused salt will be stopped and stood for 24 hours.
Solid salt, which can start to continuously enter, after completion aforesaid operations melts salt furnace.
(4) fuse salt shifts: the fused salt liquid level after thawing will be added with the solid-state fused salt continually entered and increase liquid level, melt
Melt salt and the transfer tank that preheating is completed is flowed by overflow line, until liquid level reaches defeated salt pump startup liquid level, the continuous fortune of beginning
Metaideophone salt.
3. process sewage treatment
For fused salt during thawing, the impurity such as impurity such as sand, installation residue, soil for being mixed into furnace become liquid in fused salt
Furnace bottom will be sunk to because of gravity when body, be discharged under the agitation of blender through furnace bottom blowdown valve.
4. blowing out and blowdown
(1) be added complete last bag of fused salt when, when smelting furnaces liquid level being waited decline stopping blowdown pump operation simultaneously and
When close discharge valve and prevent fused salt from flowing backwards, and stop furnace heats.
(2) about 1m is discharged in the blowdown valve for opening furnace bottom3Fused salt stops the blender of smelting furnace.
(3) smelting furnace empties:
1. adjusting the minimum starting liquid level of fused salt discharge pump, opens blowdown pump and open outlet valve.Reach most to liquid level
Stop discharge pump when low and closes pump discharge valve.
2. opening the safe dump valve that furnace bottom is connected with surge tank, pass when surge tank liquid level rises to the upper limit is checked
Valve closing door.
3. repeating 1. and 2. until smelting furnace, surge tank liquid level reach lower limit 300mm.
4. smelting furnace and surge tank blowdown are opened, until emptying.
5. keeping blowdown valve open state, air is allowed to flow into from bottom to top, natural cooling smelting furnace and surge tank.
Four, sloppy heat salt cellar note salt and the displacement of cold tank nitrogen
Sloppy heat salt cellar entirely infuses salt process and is divided into following several stages:
1. note salt to electric heater start liquid level: start to infuse salt into salt cellar, until electric heater starting liquid level 533mm with
On, start electric heater.
2. note salt is to fused salt pump startup liquid level: after fused salt injection liquid level reaches 1.5m, starting pump for liquid salts, during which pre-actuate
Pump for liquid salts is connected about 350 DEG C of preheating fused salt pipelines of pipeline electric tracing.Next starting pump for liquid salts passes through recirculation conduit and fused salt
Distribution duct carries out self-loopa, to realize that the mixing of liquid salt sufficiently avoids being layered in tank, while prevented also from molten salt heater
Local temperature is excessively high after starting.
3. note salt is to highest liquid level: persistently infusing salt according to above step to highest liquid level 14.7m.
4. cold salt cellar nitrogen displacement: after the completion of sloppy heat salt cellar infuses salt, with residual gas (oxygen) in nitrogen displacement tank.
After cold salt cellar note salt reaches highest liquid level 14.7m, start to import N2 into tank, while opening salt cellar exhaust outlet valve
Door is exhausted, and until pressure inside the tank is slightly above atmospheric pressure, while exporting detection no oxygen discharge, indicates that nitrogen replaces
Finish, closes exhaust outlet and N2 inlet valve
Five, hot melt salt cellar preheating
This process is prepared for hot melt salt cellar note salt, and (when cold salt cellar fused salt liquid level reaches 1.5m, pre-heating device can be moved to heat
Fused salt tank, cold salt cellar fused salt liquid level reach capacity liquid level half when (about 7m), can start fused salt tank preheating), this process
The step of preheating with sloppy heat salt cellar is identical.
Six, oily salt heat exchanger infuses salt
This process includes oily salt heat exchanger and the displacement of salt discharge tank nitrogen；Oily salt heat exchanger preheating and oiling；Oily salt heat exchanger
Infuse salt.
Oily salt heat exchanger nitrogen displacement step is specifically: opening oily salt heat exchanger N2 entrance door, infuses into oily salt heat exchanger
Entering N2, while opening oily salt heat exchanger exhaust outlet to salt discharge tank, detection salt discharge tank exports oxygen concentration, until no oxygen discharge,
As displacement is completed.The displacement of salt discharge tank nitrogen is identical as oily salt operation of heat exchanger.
Oily salt heat exchanger preheating and oiling step are specifically: oily salt heat exchanger preheating is heated to about 290 DEG C through electric tracing；Oil
Salt heat exchange temperature reaches with after conduction oil permission temperature difference (first conduction oil injects about 300 DEG C of temperature), starts filling heat-conductive
Oil；When oily salt heat exchanger outlet temperature is close or slightly above cold salt cellar in temperature of molten salt (292 DEG C of cold salt cellar temperature of molten salt) after, i.e.,
Meet note salt requirement.
Oily salt heat exchanger note salt step is specifically: opening a pump for liquid salts, and to be adjusted to minimum speed, while opening out
Mouth valve 10%, slowly infuses salt, after fused salt manifold pressure rises, Open valve 20%-25%；It is vented to oily salt heat exchanger
When mouth electric thermo-couple temperature shows 265-350 DEG C, represents oily salt heat exchanger and filled salt；Salt pump is continuously run at this time, it will be through exchanging heat
The salt of the heating of device injects hot tank.
Seven, hot melt salt cellar infuses salt
Fused salt in cold tank is directly injected into hot tank after system pipeline enters oily salt heat exchanger heating.
This process is identical as sloppy heat salt cellar note salt step；Injection liquid level, which reaches 1.5m, can declare that hot tank note salt is complete
At.
Eight, hot melt salt cellar nitrogen displacement
After heating salt and filling, start nitrogen displacement, step is identical as cold salt cellar.
Performance analysis is carried out below by case
Fuel consumption
This engineering method plans as a whole planning working procedure, improves construction efficiency, shortens the construction period according to unit installed capacity
(being compared according to the above note salt actual construction time and plan time, total to save 17 days durations) reduces construction cost, creates huge
Big economic benefit.
In conclusion this engineering method the duration, quality, cost and in terms of level all with higher, have
Higher promotional value.
Certainly, the above description is not a limitation of the present invention, and the present invention is also not limited to the example above, the art
Those of ordinary skill, within the essential scope of the present invention, the variations, modifications, additions or substitutions made all should belong to the present invention
Protection scope.
Claims (7)
1. slot type photo-thermal power station fused salt injection technology, which comprises the following steps:
A. the step of preparing before note salt；
B. the step of sloppy heat salt cellar preheats；
C. the step of fused salt melts；
D. the step of sloppy heat salt cellar note salt and cold tank nitrogen are replaced, including with the next stage, infuse salt to electric heater and start liquid level, open
Dynamic electric heater；Salt is infused to fused salt pump startup liquid level, starts pump for liquid salts, is carried out certainly by recirculation conduit and fused salt distribution duct
Circulation；Salt is persistently infused to highest liquid level；After the completion of sloppy heat salt cellar infuses salt, with residual gas in nitrogen displacement tank；
E. the step of heating the step of salt cellar preheats, preheating with sloppy heat salt cellar is identical；
F. the step of oily salt heat exchanger note salt, including oily salt heat exchanger and the displacement of salt discharge tank nitrogen；Oily salt heat exchanger preheating and note
Oil；Oily salt heat exchanger infuses salt；
G. the step of hot melt salt cellar note salt is identical as sloppy heat salt cellar note salt step；
H. the step of hot melt salt cellar nitrogen displacement, it is identical as sloppy heat salt cellar, after heating salt and filling, start nitrogen displacement.
2. slot type photo-thermal power station fused salt injection technology according to claim 1, which is characterized in that prepare before step a note salt
The step of include infuse salt job instruction work out and examine pass through, it is all participate in note salt work personnel need to know operation
Each details and every safety notice, all auxiliary device debugging for participating in note salt finish and in place, confirmation reaches
Infuse salt condition.
3. slot type photo-thermal power station fused salt injection technology according to claim 1, which is characterized in that step b sloppy heat salt cellar is pre-
The step of heat includes the steps that pre-heating device arrangement, pipeline connection, pre-heating system automatic adjustment preheating.
4. slot type photo-thermal power station fused salt injection technology according to claim 3, which is characterized in that pre-heating system automatic adjustment
Air and gas flow into burner and the air that will be mixed with hot combustion gas, reach before entering tank 200 DEG C-
600℃；The thermocouple of real-time monitoring salt cellar each position in warm, it is ensured that each position temperature uniformly rises in salt cellar, and protects
Temperature is demonstrate,proved in early warning range；Temperature reaches 350 DEG C -370 DEG C in tank, and preheating is completed, and stops pre-heating device, and burner extinguishes,
Blower remains in operation 10 minutes cooled-preheated equipment, and closing valve prevents hot air reflow to equipment, and injecting compressed air is cooling
Equipment.
5. slot type photo-thermal power station fused salt injection technology according to claim 1, which is characterized in that step c fused salt melted
Step includes pre-stored solid-state fused salt, the crushing of solid salt and transmission, enters furnace preheating, fuse salt transfer, the liquid fused salt after thawing
Position will be added with the solid-state fused salt continually entered and increase liquid level, and fuse salt flows into the transfer that preheating is completed by overflow line
Tank starts to continuously run note salt until liquid level reaches defeated salt pump startup liquid level.
6. slot type photo-thermal power station fused salt injection technology according to claim 5, which is characterized in that the crushing and biography of solid salt
Defeated step includes,
Mixing match: 60% sodium nitrate and 40% sodium nitrate, will according to the ratio of 3:2 simultaneously it is enterprising in two preprocessors
Row feeding and crushing, two adhesive tape drive end units connecting with smelting furnace are furnished with electronic scale, weighing information will be delivered to the PLC of smelting furnace into
Row calculates, and the running speed of every sealing-tape machine is controlled by PLC, reaches preset mixed proportion requirement.
It is broken to open bag: solid salt is maneuvered into the included lifting elevator region of sealing-tape machine by storage area through fork truck, defeated via belt
It send the crane of machine that will be promoted at the solid salt of bag and is caught broken machine top automatically, bag is opened by the operation completion of operator；Solid
The salt of bulk, which will be carried out squeezing by the fixture of chunk breaker, completes preliminary be crushed；
Transmission: the pulverizer that broken bulk particle falls into bottom is crushed, and the solid salt through crushing qualified falls into adhesive tape
Machine；
Dedusting: the dust that broken and transmission generates will be adsorbed by the deduster for being arranged in end and be again returned on sealing-tape machine.
7. slot type photo-thermal power station fused salt injection technology according to claim 1, which is characterized in that
Oily salt heat exchanger nitrogen displacement step is specifically in step f: oily salt heat exchanger N2 entrance door is opened, into oily salt heat exchanger
N2 is injected, while opening oily salt heat exchanger exhaust outlet to salt discharge tank, salt discharge tank is detected and exports oxygen concentration, until no oxygen is arranged
Out, as displacement is completed；The displacement of salt discharge tank nitrogen is identical as oily salt operation of heat exchanger；
Oily salt heat exchanger preheating and oiling step are specifically: oily salt heat exchanger preheating is heated to about 290 DEG C through electric tracing；Oily salt changes
Hot device temperature reaches with after conduction oil permission temperature difference, starts filling heat-conductive oil；When oily salt heat exchanger outlet temperature is close or omits
After temperature of molten salt in cold salt cellar, that is, meet note salt requirement；
Oily salt heat exchanger note salt step is specifically: opening a pump for liquid salts, and to be adjusted to minimum speed, while opening outlet valve
Door 10%, slowly infuses salt, after fused salt manifold pressure rises, Open valve 20%-25%；To oily salt heat exchanger exhaust outlet heat
At 265-350 DEG C of galvanic couple temperature display, represents oily salt heat exchanger and filled salt；Salt pump is continuously run at this time, it will be through heat exchanger
The salt of heating injects hot tank.
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