Summary of the invention
The present invention can not meet carrying out the clear of edging chamfering back-panel glass afterwards in order to solve traditional cleaningWash the technical problem of demand, designed the cleaning to back-panel glass in a kind of thin-film solar cells production, utilize this clearWash the impurity such as particulate that technique can remove the backboard safety glass remained on surface after edging chamfering, organic matter, grease, chip,Can effectively improve follow-up lamination process quality, play vital effect to improving cell power generation efficiency.
The technical solution used in the present invention is: the cleaning to back-panel glass in a kind of thin-film solar cells production,Key is: this technique is to scrub matching purge by the pre-spray wash chamber, the round brush that set gradually on glass transfer rollerChamber, again spray wash chamber, rinsing chamber and dry that chamber realizes, described processing step comprises:
A, pre-spray clean: will spray in advance wash chamber and be controlled under normal temperature state, and using deionized water as cleaning fluid, willThe one group of nozzle assembly arranging respectively at transfer roller upper and lower 90-110mm place sprays in advance as cleaning means, wherein, everyGroup nozzle assembly comprises 18-25 fan nozzle, and the flow of each nozzle under 0.12-0.16Mpa pressure is 1-1.1L/min;
B, round brush are scrubbed matching purge: round brush is scrubbed to matching purge chamber and is controlled at 45 DEG C ± 2 DEG C temperature, will go fromSub-water is as spray liquid, using the one group of nozzle assembly arranging respectively at transfer roller upper and lower 90-110mm place as cleaning meansSpray, meanwhile, what use was 300 ~ 600rpm at the rotating speed arranging respectively apart from transfer roller upper and lower 0-8mm place rollsScrub, wherein, every group of nozzle assembly comprises 30-35 fan nozzle, and each nozzle is at 0.12-0.16Mpa pressureUnder flow be 1-1.1L/min;
C, spray cleaning again: will again spray wash chamber and be controlled under normal temperature state, using deionized water as cleaningAgent, sprays the one group of nozzle assembly arranging respectively at transfer roller upper and lower 90-110mm place again as cleaning meansClean, wherein, every group of nozzle assembly comprises 18-25 fan nozzle, the flow of each nozzle under 0.3-0.4Mpa pressureFor 1-1.15L/min;
D, rinsing: in rinsing chamber, upper and lower back-panel glass surface is rinsed;
E, oven dry: drying in chamber, by upper and lower back-panel glass skin drying, complete whole cleaning process.
The described quantity that again sprays wash chamber is 2, be set in turn in round brush scrub matching purge chamber after,Before rinsing chamber.
The quantity of described rinsing chamber is 2, be set in turn in again spray wash chamber after, dry chamber itBefore, rinsing chamber is controlled under normal temperature, using deionized water as purificant, by glass transfer roller upper and lower 90-110mm placeThe one group of nozzle assembly arranging respectively carries out rinsing as cleaning means, and wherein, every group of nozzle assembly comprises that 15-20 is individual fan-shapedNozzle, the flow of each nozzle under 0.12-0.16Mpa pressure is 1-1.15L/min.
The quantity of described oven dry chamber is 2, after being set in turn in rinsing chamber, on this basis, described bakingDry process comprises:
E1, one-level air knife purge dries: in the first oven dry chamber, carry out, utilize transfer roller upper and lower 0-8mm place respectivelyThe one-level air knife arranging is dried, and wherein, the angle of one-level air knife and glass direct of travel is 60 °-80 °, the wind-warm syndrome blowing outDegree is 25 ~ 50 DEG C, and air quantity is 200 ~ 700m3/h;
E2, secondary air knife purge dries: in the second oven dry chamber, carry out, utilize transfer roller upper and lower 0-8mm place respectivelyThe secondary air knife arranging is dried, and wherein, the angle of secondary air knife and glass direct of travel is 60 °-80 °, the wind-warm syndrome blowing outDegree is 25 ~ 80 DEG C, and air quantity is 200 ~ 700m3/h。
The invention has the beneficial effects as follows: 1, by main four steps required in manufacture of solar cells process are cleaned to demandResearch, designed technical solution of the present invention, the cleaning in this programme is applicable to back-panel glass after edging chamferingClean, broken tradition to the unified way that adopts a kind of cleaning process flow of four step cleaning demands, make glass surface dirtThe cleaning of stain is more pointed, and cleaning performance is more remarkable, and has effectively saved cost; 2, utilize this technique to the back of the bodyThe cleaning of glass sheet, particulate, fingerprint, cutting oil, plastics, rubber and the glass that can effectively remove back-panel glass surface separateThe impurity such as material (lucite, a small amount of remaining chip); 3, clean front every square metre of glass that granule number is greater than 2000Substrate clearance rate>=95%; Before cleaning, granule number is less than 2000, every square metre of granule number<100 after cleaning, particle size>25 micro-Rice, is equal to the requirement of 10000 grade clean rooms; 4, under spotlight, detect by an unaided eye, glass surface is without particle and cut; 5,Organic matter: ensure contact angle≤15 degree of glass after cleaning; 6, former cleaning processing equipment overall length 16000mm, adopts new clearWash process equipment overall length 4260mm, reduced cost of investment.
Detailed description of the invention
Thin-film solar cells produce in a cleaning to back-panel glass, this technique is by glass transfer rollerPre-spray wash chamber 1, the round brush setting gradually on 9 scrubbed matching purge chamber 2, again sprayed wash chamber 3, rinsing chamber4 and dry chamber 5 and realize, described processing step comprises:
A, pre-spray clean: will spray in advance wash chamber 1 and be controlled under normal temperature state, and using deionized water as cleaning fluid,The one group of nozzle assembly arranging respectively at transfer roller upper and lower 90-110mm place is sprayed in advance as cleaning means, wherein,Every group of nozzle assembly comprises 18-25 fan nozzle, and the flow of each nozzle under 0.12-0.16Mpa pressure is 1-1.1L/min;
B, round brush are scrubbed matching purge: round brush is scrubbed to matching purge chamber 2 and be controlled at 45 DEG C ± 2 DEG C temperature, will goIonized water is as spray liquid, using the one group of nozzle assembly arranging respectively at transfer roller upper and lower 90-110mm place as scavengerTool sprays, and meanwhile, use is 300 ~ 600rpm at the rotating speed arranging respectively apart from transfer roller upper and lower 0-8mm placeRound brush 8 is scrubbed, and wherein, every group of nozzle assembly comprises 30-35 fan nozzle, and each nozzle is pressed at 0.12-0.16MpaFlow under power is 1-1.1L/min;
C, spray cleaning again: will again spray wash chamber 3 and be controlled under normal temperature state, using deionized water as cleaningAgent, sprays the one group of nozzle assembly arranging respectively at transfer roller upper and lower 90-110mm place again as cleaning meansClean, wherein, every group of nozzle assembly comprises 18-25 fan nozzle, the flow of each nozzle under 0.3-0.4Mpa pressureFor 1-1.15L/min;
D, rinsing: in rinsing chamber 4, upper and lower back-panel glass surface is rinsed;
E, oven dry: drying in chamber 5, by upper and lower back-panel glass skin drying, complete whole cleaning process.
In order thoroughly the impurity of the base plate glass remained on surface after round brush and cleaning agent matching purge to be removed, more describedThe quantity of inferior spray wash chamber 3 is 2, be set in turn in round brush scrub matching purge chamber 2 after, before rinsing chamber 4.
In order to strengthen wash effect to make the cleaning of glass meet cleannes demand, the quantity of described rinsing chamber 4Be 2, be set in turn in again spray wash chamber 3 after, dry before chamber 5, rinsing chamber 4 is controlled at normal temperatures,Using deionized water as purificant, one group of nozzle assembly that transfer roller upper and lower 90-110mm place is arranged is respectively as cleaningInstrument carries out rinsing, and wherein, every group of nozzle assembly comprises 15-20 fan nozzle, and each nozzle is pressed at 0.12-0.16MpaFlow under power is 1-1.15L/min.
In order to strengthen drying effect, the quantity of described oven dry chamber 5 is 2, after being set in turn in rinsing chamber 4,On this basis, described baking operation step comprises:
E1, one-level air knife purge dries: in the first oven dry chamber 5-1, carry out, utilize transfer roller upper and lower 0-8mm placeThe one-level air knife 7 arranging is respectively dried, and wherein, one-level air knife 7 is 60 °-80 ° with the angle of glass direct of travel, blows outAir temperature be 25 ~ 50 DEG C, air quantity is 200 ~ 700m3/h;
E2, secondary air knife purge dries: in the second oven dry chamber 5-2, carry out, utilize transfer roller upper and lower 0-8mm placeThe secondary air knife 6 arranging is respectively dried, and wherein, secondary air knife 6 is 60 °-80 ° with the angle of glass direct of travel, blows outAir temperature be 25 ~ 80 DEG C, air quantity is 200 ~ 700m3/h。
For the fingerprint of glass surface, cutting wet goods residue are removed, described alkalescent cleaning agent be concentration be 2% ~5% NaOH or KOH or TMAH cleaning agent.
In order to meet the cleaning pressure demand in this technical process, described nozzle is that material is that SUS303, bore are 1/8Very little, spray angle is the fan nozzle of 90 °.
The material of described round brush 8 is that nylon 612, diameter are ¢ 0.1 ~ ¢ 0.063. Use this material and diameterRound brush, can, when protective substrate glass surface is not by scratching, reach good cleaning effect.
The air feed system structure of described one-level air knife 7 comprises one-level air blast 7-1 and defeated with one-level air blast wind-forceGo out the main air filter 7-2 that end connects, the output of main air filter 7-2 and the wind-force input of one-level air knife 7Connect.
The air feed system structure of described secondary air knife 6 comprises secondary air blast 6-1, exports with secondary air blast wind-forceThe heater 6-2 that end connects and the secondary air filter 6-3 being connected with heater output, secondary air filter 6-3'sOutput is connected with the wind-force input of secondary air knife 6.
Described one-level air knife 7, secondary air knife 6 is that material is the cylinder structure of SUS304.
In the specific implementation, referring to the structural representation of the purging system based on this cleaning shown in accompanying drawing 1. At the back of the bodyOn glass sheet transfer roller 9, according to production line order set gradually pre-spray wash chamber 1, round brush is scrubbed matching purge chamber2,2 of chambers spray wash chamber, 2 rinsing chambers and 2 oven dry chambers again, and back-panel glass to be cleaned is passed through upper successivelyState each chamber, utilize this cover cleaning can remove the particulate of the back-panel glass remained on surface after edging chamfering, organic matter,The impurity such as grease, chip, can effectively improve the lamination quality of production line subsequent technique.
In pre-spray wash chamber 1, arrange respectively at back-panel glass transfer roller 9 upper and lower 90-110mm places one groupNozzle assembly. In cleaning process, this chamber temp is controlled to normal temperature, sprays in advance by deionized water, wherein, nozzle is materialMatter is that SUS303, bore are that 1/8 cun, spray angle are the fan nozzle of 90 °, and every group of nozzle assembly comprises 21 fan-shaped spraysMouth, the flow of each nozzle under 0.15Mpa pressure is 1.06L/min.
Scrub in matching purge chamber 2 the one group of spray arranging respectively at transfer roller 9 upper and lower 90-110mm places at round brushNozzle assembly, is controlled at the temperature in this chamber at 45 DEG C ± 2 DEG C, with deionized water spray, and apart from transfer roller upper and lower 0-The rotating speed that 8mm place arranges is respectively that the round brush of 300 ~ 600rpm is scrubbed, wherein, every group of nozzle assembly comprise 32 fan-shapedNozzle, the flow of each nozzle under 0.15Mpa pressure is 1.06L/min;
Again spray in wash chamber 3 the one group of nozzle arranging respectively at transfer roller upper and lower 90-110mm place eachAssembly, will again spray wash chamber and be controlled under normal temperature state, sprays with deionized water, wherein, every group of nozzle assemblyComprise 21 fan nozzles, nozzle uses flow under 0.3Mpa pressure for 1L/min or adopts at 0.4Mpa pressureUnder the flow nozzle that is 1.15L/min;
The quantity of described rinsing chamber 4 is 2, be set in turn in again spray wash chamber 3 after, dry chamber 5, rinsing chamber 4 is controlled at normal temperatures, using deionized water as purificant, by through again spraying the backboard after operation beforeOne group of nozzle assembly that glass transfer roller upper and lower 90-110mm place arranges respectively carries out rinsing as cleaning means, wherein, everyGroup nozzle assembly comprises 15-20 fan nozzle, and the flow of each nozzle under 0.12-0.16Mpa pressure is 1-1.15L/Min, while specifically use, the nozzle quantity of the transfer roller upper and lower in can the first rinsing chamber 4-1 is set to 21,0.3Flow under Mpa pressure is that the flow under 1L/min or 0.4Mpa pressure is 1.15L/min, will be in the second rinsing chamber 4-2The nozzle quantity of transfer roller upper and lower be set to 17, the flow under 0.15Mpa pressure is 1.06L/min.
In order to strengthen drying effect, the quantity of described oven dry chamber 5 is 2, first dries chamber 5-1 and the second bakingDry chamber 5-2 after two chambers are set in turn in rinsing chamber 4, carries out in the first oven dry chamber 5-1, utilizes transfer rollerThe one-level air knife 7 that upper and lower 0-8mm place arranges is respectively dried, wherein, and one-level air knife 7 and back-panel glass direct of travelAngle is 60 °-80 °, with the angle of the perpendicular direction of back-panel glass direct of travel be 15 ° ~ 20 °, the air temperature blowing out is 25 ~ 50DEG C, air quantity is 200 ~ 700m3/ h, the air feed power source of one-level air knife is one-level air blast 7-1, one-level air blast 7-1 blows outAir flows to one-level air knife 7 through main air filter 7-2; In the second oven dry chamber 5-2, utilize transfer roller upper and lowerThe secondary air knife 6 that 0-8mm place of side arranges is respectively dried, and wherein, secondary air knife 6 with the angle of back-panel glass direct of travel is60 °-80 °, and the angle of the perpendicular direction of glass direct of travel: 15 ° ~ 20 °, the air temperature blowing out is 25 ~ 80 DEG C, and air quantity is200~700m3/h。