CN105438849A - Dust discharging process and dust discharging structure used for yellow phosphorus gas purifying - Google Patents
Dust discharging process and dust discharging structure used for yellow phosphorus gas purifying Download PDFInfo
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- CN105438849A CN105438849A CN201510724521.6A CN201510724521A CN105438849A CN 105438849 A CN105438849 A CN 105438849A CN 201510724521 A CN201510724521 A CN 201510724521A CN 105438849 A CN105438849 A CN 105438849A
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- ash
- dust
- ash silo
- yellow phosphorus
- silo
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- 239000000428 dust Substances 0.000 title claims abstract description 249
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 title claims abstract description 155
- 238000000034 method Methods 0.000 title claims abstract description 82
- 238000007599 discharging Methods 0.000 title claims abstract description 46
- 239000011574 phosphorus Substances 0.000 claims abstract description 52
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 52
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000007787 solid Substances 0.000 claims abstract description 33
- 238000010438 heat treatment Methods 0.000 claims abstract description 21
- 238000000926 separation method Methods 0.000 claims abstract description 11
- 238000000746 purification Methods 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 111
- 238000004140 cleaning Methods 0.000 claims description 82
- 238000009413 insulation Methods 0.000 claims description 23
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- 239000004071 soot Substances 0.000 claims description 13
- 230000001681 protective effect Effects 0.000 claims description 9
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 6
- 229910052756 noble gas Inorganic materials 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 abstract description 7
- 239000010802 sludge Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 13
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 230000006378 damage Effects 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 238000009835 boiling Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000003818 cinder Substances 0.000 description 2
- 239000000571 coke Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 150000003017 phosphorus Chemical class 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- QVMHUALAQYRRBM-UHFFFAOYSA-N [P].[P] Chemical compound [P].[P] QVMHUALAQYRRBM-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/34—Emptying devices
- B65G65/40—Devices for emptying otherwise than from the top
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
- B65D88/70—Large containers characterised by means facilitating filling or emptying preventing bridge formation using fluid jets
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/02—Preparation of phosphorus
- C01B25/027—Preparation of phosphorus of yellow phosphorus
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention aims at solving the technical problem of providing a dust discharging process and dust discharging structure used for yellow phosphorus gas purifying. Through the dust discharging process and dust discharging structure, producing of phosphorous sludge can be effectively reduced and even almost be eliminated. According to the dust discharging process and dust discharging structure used for yellow phosphorus gas purifying, firstly, the dust discharging process used for yellow phosphorus gas purifying comprises the steps that dust filtered out through the gas-solid separation of yellow phosphorus gas is accumulated; then, the dust is discharged to the outside of a yellow phosphorus gas purification device and subjected to follow-up transporting; in the processes, the operations that the dust is heated, so that solid yellow phosphorus in the dust volatilizes, and volatilized gaseous phosphorus and solid dust are separated are adopted; secondly, the dust discharging structure used for yellow phosphorus gas purifying comprises the yellow phosphorus gas purification device connected with a dust accumulating device, the dust accumulating device comprises a heating element and an air outlet, wherein the heating element can heat the solid yellow phosphorus in the dust to volatilize, and the air outlet is used for conducting gas-solid separating.
Description
Technical field
The present invention relates to phosphorus production field, particularly for the dust ash discharge of the purification yellow phosphorus gas in phosphorus production field.
Background technology
Yellow phosphorus is the chemical products of a kind of high energy consumption, high material-consumption, high pollution.Current phosphorus production is by the input electric furnace reaction according to a certain percentage of phosphorus ore, coke and silica difference, then carries out a series of process to the yellow phosphorus furnace gas reacting generation in electric furnace, finally obtains yellow phosphorus.
In current domestic yellow phosphorus preparation technology, what generally adopt is prepare yellow phosphorus by electrothermal way, the carbonic oxide contained in furnace gas, phosphorus, silicon tetrafluoride, hydrogen sulphide, elemental sulfur and the impurity such as trickle ground phosphate rock and coke blacking purify by the mode again through washing, these impurity enter cold phosphorus system together with phosphorus furnace gas, through washing compound---the mud phosphorus be condensate in by forming a large amount of emulsion state in phosphorus groove.Phosphorus content in mud phosphorus is all very high, the mud phosphorus amount produced in refinery pit can reach 90%, and the mud phosphorus phosphorus content entering sink drainage is lower, be generally 35 ~ 60%, its phosphorus content of grains of sand shape mud phosphorus entering the places such as trench also has 3% ~ 35%, this also just causes very large pollution and destruction to environment, and these mud phosphorus be carried out processing also is need very high cost and very large energy consumption, simultaneously also because phosphorus itself belongs to flammable object, deal with also with certain potential safety hazard, also corresponding causing the P elements in raw materials for production is wasted significantly simultaneously, reduce production efficiency.
And at present, domestic almost do not have a kind of mode above-mentioned mud phosphorus can be eliminated.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of ash discharge technique for yellow phosphorus gas cleaning and ash discharge structure.By this ash discharge technique and ash discharge structure, the generation even almost eliminating mud phosphorus effectively can be reduced.
First, for realizing above-mentioned first object, ash discharge technique for yellow phosphorus gas cleaning provided by the present invention, comprise yellow phosphorus gas gas solid separation is filtered out dust accumulation, then carry out to the outside of yellow phosphorus gas cleaning unit discharging and the process of subsequent delivery, wherein, take in said process to heat described dust thus the solid yellow phosphorus in dust gasified volatilize and make the gaseous state phosphorus that volatilizes and solid-state dust realize the operation of shunting.
In above-mentioned technique, first comprise be by the gas in yellow phosphorus gas and gas with dust carry out gas solid separation carry out dust filtration assemble, this process is carried out in yellow phosphorus gas cleaning unit, afterwards, again the dust collected is heated, thus make solid yellow phosphorus contained in dust, volatilized by heating, and make the gaseous state phosphorus after volatilization and solid-state dust carry out triage operator.Thus in above-mentioned technique, the solid yellow phosphorus contained in dust can be removed, achieve simply and easily in dust without phosphatization, safely and effectively the yellow phosphorus in dust is removed, the dust obtained so can not form mud phosphorus again in subsequent treatment, therefore reduce significantly to the pollution that environment causes in yellow phosphorus preparation technology, while improve environment friendliness degree, also reduce the cost to dust process significantly.Achieve impurity dust in phosphorus production industry and no longer produce mud phosphorus and the important breakthrough that becomes dry dust phosphorous hardly.
Be further, said process comprise be provided with the first ash silo be positioned at yellow phosphorus gas cleaning unit lower end collect dust, wherein be provided with exhausr port in the first ash silo to be connected with yellow phosphorus gas cleaning unit, dust is arranged in this first ash silo and is heated to 200 DEG C ~ 280 DEG C, and time of heat is 1 ~ 4 hour.In above-mentioned technique, wherein be provided with the first ash silo and be positioned at yellow phosphorus gas cleaning unit lower end collection dust, and be provided with exhausr port in the first ash silo to be connected with yellow phosphorus gas cleaning unit, generally speaking, now in solid dust, yellow phosphorus quality accounting is about 5 ~ 12%, industrially, the dust of this phosphorus content does not allow directly discharge, if and such dust forms the low lean phosphorus mud of phosphorus content at certain condition, has sizable harm to environment, and lean phosphorus mud bothers again on treating process very much, need to solve so this problem is also this technique.And in above-mentioned technique, the bottom of yellow phosphorus gas cleaning unit is provided with the first ash silo, dust in yellow phosphorus gas cleaning unit is passed into the first ash silo and carries out heating operation, thus realize dust realize in the first ash silo by the solid yellow phosphorus in dust with the form of gas volatilization discharge.In above-mentioned technique, institute the first ash silo and yellow phosphorus gas cleaning unit to be directly connected be carry out subsequent delivery to realize the solid yellow phosphorus in dust to volatilize with the form of gaseous state yellow phosphorus and again import in yellow phosphorus gas cleaning unit, improve yellow phosphorus and prepare raw material availability in production technology.Like this, the dust in the first ash silo is heated to 200 DEG C ~ 280 DEG C and is at least incubated operation 1 ~ 4 hour, be also go out with the volatilization of the form of gaseous state yellow phosphorus fully in order to ensure the solid yellow phosphorus in dust as far as possible.It is to be noted, because the boiling point of industrial and mineral yellow phosphorus is about 181, the boiling point of pure yellow phosphorus is about 281 DEG C, actual boiling point according to the admixture of yellow phosphorus and and self purity and have certain change, detect according to practice, the yellow phosphorus boiling point in the dust related in the present invention is in the scope between 181 DEG C ~ 200 DEG C.In above-mentioned technique, why selective temperature is 200 DEG C ~ 280 DEG C and is through contriver in Practical experiments, measures the heating temperature range drawn, the yellow phosphorus in dust can be realized to discharge with the volatilization of the form of gaseous state yellow phosphorus; And the soot density relative loose be passed into after yellow phosphorus gas cleaning unit filters in the first ash silo; So in above-mentioned condition, the exhaust structure that the gaseous state yellow phosphorus volatilized in dust is connected from the first ash silo with yellow phosphorus gas cleaning unit is discharged, and realizes also making yellow phosphorus again reclaim the conversion ratio improving phosphorus in the form of a vapor while that solid yellow phosphorus in the first ash silo in dust being removed.Certainly, also the lower end of yellow phosphorus gas cleaning unit directly can be communicated with the first ash silo upper end in above-mentioned technique, make to be formed a closed entirety between the two, like this, the dust that just can complete process heating in the first ash silo, after being volatilized in the form of a vapor by solid yellow phosphorus, directly can enter yellow phosphorus gas cleaning unit again.First ash silo carries out insulation more than 1 ~ 4 hour in above-mentioned 200 DEG C ~ 280 DEG C temperature, through the Practical experiments of contriver, can realize the phosphorous mass ratio of dust in the first ash silo lower than 3%.Phosphorus content in such dust has been low to moderate the harm of human body very little, also without the need to remaking special protective treatment because of the comb. of yellow phosphorus again, yellow phosphorus can be improve significantly and prepare environment friendliness degree in industry, and also improve the degree of utilization of raw material accordingly.
Further, dust is heated to 240 DEG C ~ 260 DEG C in the first ash silo, time of heat is 2 ~ 2.5 hours.After the Practical experiments of contriver, when finding that controlling the heating-up temperature of dust in the first ash silo is 240 DEG C ~ 260 DEG C, time of heat controls at 2 ~ 2.5 hours, and the phosphorous mass ratio that can realize in dust reaches lower than 1%, namely substantially can regard as in dust not phosphorous; And at this moment, the control for the energy consumption in technique and efficiency is also be in a state comparatively optimized.Through the dust of process like this, phosphorus content wherein can not cause any impact to environment, becomes the slag of a kind of very environmental protection in phosphorus production technique.
Further, dust after stopping heating, be incubated cooling more than 0.5 hour, dust temperature falls in less than 90 DEG C.Because the dust temperature after above-mentioned furnace run is still very high, the temperature of dust is now not suitable for discharging directly to the external world; Still can remain the solid yellow phosphorus of hoot in dust, so dust to be carried out insulation cooling 0.5 is little is down to less than 90 DEG C up to its temperature simultaneously.Such first can guarantee that the temperature of dust itself is lower, can not cause danger and destruction by environment to external world; Second can prevent dust quick refrigeration and be condensed into block to its cleaning and transport bring inconvenience; 3rd also can utilize waste heat further to be cleared up by the yellow phosphorus remained in dust.After such processing step, the dust obtained has very high friendly degree to environment, eliminates the generation of mud phosphorus, and can directly carry out toppling over, bury or utilizing as breeze secondary.
Further, be positioned at the first ash silo lower end and be provided with the second ash silo, dust is entered in the second ash silo carry out insulation cooling 0.5 ~ 1 hour, temperature is down to less than 70 DEG C.First ash silo lower end is provided with the second ash silo, achieves the multistep treatment to dust, separately process to the heating of dust and insulation cooling in different processing equipment, effectively can improve the work efficiency in technique.Through the Practical experiments of contriver, find the dust cooling insulation in the second ash silo 0.5 ~ 1 hour, chilling temperature is the work-hours proportioning that a kind of economic benefit is higher when being down to below 70 DEG C, can be generally at this time 0.5 ~ 0.8m3 by the second ash silo fixing fabric structure is have higher economic benefit.
Further, be provided with the ash discharging hole that ash-valve and ash releasing tube form between the first ash silo and the second ash silo, the second ash silo lower end is provided with the cinder-discharging port be connected with the external world, and this cinder-discharging port comprises unloading valve and ash-unloading tube:
Before yellow phosphorus gas cleaning unit passes into dust to the first ash silo and dust carry out in the first ash silo in heat process, control ash-valve ash discharging hole is closed;
Dust the first ash silo through heating after, nitrogen or noble gas is passed into in the second ash silo, and the cinder-discharging port controlled in the second ash silo is in closure state, and the equalizing pipe be provided with between the first ash silo and the second ash silo for equilibrium of pressure, open equalizing pipe, control ash discharging hole by ash-valve afterwards to open, dust is entered the second ash silo;
After dust in the first ash silo enters the second ash silo, close ash discharging hole, dust is placed in the second ash silo insulation cooling;
After completing the second ash silo insulation cooling down operation, closed equalizing pipe, stops passing into nitrogen or noble gas, then controls ash-valve and open and be discharged outside to by dust;
Wherein carry out isothermal holding and/or furnace run in described ash releasing tube.
A kind of dust to enter a kind of optimization of the second ash silo again process from yellow phosphorus gas cleaning unit to the first ash silo is achieved by above-mentioned technique, in this process, achieve after dust entered the first ash silo and carry out the heating closed between yellow phosphorus gas cleaning unit and gaseous state yellow phosphorus is carried out gas solid separation importing yellow phosphorus gas cleaning unit.Afterwards again by the ash discharging hole between the first ash silo and the second ash silo, and the equalizing pipe be provided with between the first ash silo and the second ash silo for balancing pressure between two ash silos, be engaged in again in the second ash silo and pass into nitrogen or noble gas, thus guarantee that in whole process, realization discharge air guarantees the safety in technological process.Through insulation cooling after dust enters into the second ash silo, closed equalizing pipe, stops passing into nitrogen or noble gas, then controls ash-valve and open and be discharged outside to by dust.In this technological process, can the first ash silo be avoided to enter in the process of dust to the second ash silo occur wall sticking phenomenon because of dust cooling by actv. carrying out isothermal holding and/or furnace run in ash releasing tube.If do not carry out isothermal holding and/or furnace run to ash releasing tube, even a small amount of sticky wall, in use year in year out, also also very large impact can be caused to the ash discharge efficiency of ash releasing tube, so carry out isothermal holding to ash releasing tube in above-mentioned technique and/or furnace run is necessary.
Further, in the first ash silo, being provided with temperature-detecting device, completing material level observation by detecting the change of temperature in the first ash silo; When wherein yellow phosphorus gas cleaning unit passes into dust in the first ash silo, vertical dimension in the first ash silo detected
when position temperature obviously raises, then yellow phosphorus gas cleaning unit is stopped to continue to pass into dust toward the first ash silo; When first ash silo discharges dust in the second ash silo, when detecting that the interior vertical dimension 200mm ~ 1000mm position temperature of the first ash silo obviously reduces, then the first ash silo is stopped to continue to discharge dust toward the second ash silo.By above-mentioned technique, realize controlling preferably the Dust Capacity in the first ash silo.In the first ash silo, inwall carries out temperature detection, thus when detecting that the temperature of this position on inwall obviously rises or declines, can judge the material level of dust in the first ash silo.This mode only needs detector unit, so structure is simple, cost is very low, economical and practical, and the first ash silo in hot environment, easily there is sticky wall and airborne dust in its inwall, cannot carry out good material level judgement by directly observing, alternate manner is as higher in costs such as laser detection, use is complicated, and accuracy and the practicality of the observation of its material level are also undesirable.And by above-mentioned material level observation process to the dust charge level height observation in the first ash silo, realize the control to Dust Capacity in the first ash silo, thus realize controlling the Dust Capacity comprised in the follow-up work process of the second ash silo.As described in above-mentioned technique, through Practical experiments, when wherein yellow phosphorus gas cleaning unit passes into dust in the first ash silo, vertical dimension in the first ash silo cavity detected
when position temperature obviously raises, then yellow phosphorus gas cleaning unit is stopped to continue to pass into dust toward the first ash silo; When first ash silo discharges dust in the second ash silo, when the vertical dimension 200mm ~ 1000mm position temperature detecting in the first ash silo obviously reduces, then the first ash silo is stopped to continue to discharge dust toward the second ash silo; This is a kind of optimal control passing into the dust in the first ash silo and discharge, thus realize the optimal control of Dust Capacity in the first ash silo, and then by this optimal control to Dust Capacity in the first ash silo, realize optimal control to the Dust Capacity in whole process, avoid the disposable dust entering the first ash silo furnace run of ash too much or very few.
Meanwhile, be provided with the auxiliary soot blower be connected with the first ash silo and/or the second ash silo, this auxiliary soot blower comprises carrying out inwall annular blast in warehouse and jetting up and down two techniques to lower end dust outlet in warehouse.By above-mentioned technique, carry out inwall annular blast technique by auxiliary soot blower in the first ash silo and/or the second ash silo, realize carrying out in the cavity to ash silo that inwall is auxiliary blows ash thus dust can be avoided to build bridge in ash silo or stick on grey bulkhead; Above-mentioned inwall annular blast technique is preferably adopted as and is a kind ofly purged by the cavity inner wall of blowing gas to ash silo, this purge gas preferably acts on the cut mode of being partial to below the dust that the cavity inner wall of ash silo adheres to, form the downward swirling eddy of annular at the cavity inner wall of ash silo, thus avoid dust build bridge in ash silo or stick on grey bulkhead.Meanwhile, by auxiliary soot blower, upper and lower blowing process is carried out to ash silo, thus avoid the dust in ash silo to result in blockage to ash discharging hole in the process of ash discharge; The above-mentioned cavity lower end ash discharging hole to ash silo carries out upper and lower blowing process, preferred employing arranges the shower nozzle of upper and lower nozzle in the lower end ash discharging hole central authorities of the cavity of ash silo, thus the dust that ash discharging hole is assembled can be stirred, destroyed, ash discharging hole is dredged fully, prevents dust from blocking.Above-mentioned auxiliary soot blower, preferably employing application number is the yellow phosphorus gas cleaning unit ash discharge auxiliary device in the utility model patent of 2013206812136.Further, in above-mentioned technique, inwall annular blast is carried out to the cavity of ash silo and can also promote that the yellow phosphorus in dust accelerates gaseous state and discharges to a certain extent.
In sum, by above-mentioned technique, thus realize a kind of easy and simple to handle, safely and effectively the yellow phosphorus in dust is removed, realize without phosphatization in dust, also effectively can improve the phosphorus conversion ratio of raw material to finished product simultaneously, improve production efficiency; And the dust after above-mentioned PROCESS FOR TREATMENT, its phosphorus content is down to less than 3%, in the treating process in later stage, phosphorus content in dust has been low to moderate the harm of human body very little, also without the need to remaking special protective treatment because of the comb. of yellow phosphorus again, reduce the processing cost of dust, the pollution reducing dust improves the friendly degree to environment.After each is further optimized, the dust that a kind of phosphorus content is almost nil can be realized, achieve impurity dust in phosphorus production industry first and become the important breakthrough of dry not phosphorous dust by mud phosphorus.
Secondly, for realizing second object, ash discharge structure for yellow phosphorus gas cleaning provided by the present invention, include and yellow phosphorus is carried out the yellow phosphorus gas cleaning unit that gas solid separation realizes purification, wherein, described yellow phosphorus gas cleaning unit is connected with dust collecting, includes the heater element making the solid yellow phosphorus in dust carry out heating volatilization in this dust collecting, and for carrying out the exhausr port of gas solid separation.In said structure, wherein there is yellow phosphorus gas cleaning unit for filtering yellow phosphorus furnace gas, mainly the solid particulate matters such as the dust in furnace gas are filtered, now filter in the dust obtained and must contain a certain proportion of yellow phosphorus, generally speaking, the yellow phosphorus quality accounting in dust is about 5 ~ 12%, the dust of this phosphorus content does not allow direct discharge, and the low mud phosphorus of phosphorus content may be formed, large to the harm of environment, but deal with and bother very much.In said apparatus, the bottom of yellow phosphorus gas cleaning unit is provided with dust collecting, by being provided with the heater element making the solid yellow phosphorus in dust carry out heating volatilization in this dust collecting, with the exhausr port for carrying out gas solid separation, thus can realize heating described dust thus the solid yellow phosphorus in dust is gasified and volatilize and make the gaseous state phosphorus that volatilizes and solid-state dust realize the operation of shunting.
Further, described dust collecting is the first ash silo, and this first ash silo is for being connected to yellow phosphorus gas cleaning unit lower end and and being provided with exhausr port between yellow phosphorus gas cleaning unit.Like this, just can by be connected to yellow phosphorus gas cleaning unit lower end and and be provided with the first ash silo of exhausr port between yellow phosphorus gas cleaning unit, the integration realized between above-mentioned dust collecting and yellow phosphorus gas cleaning unit connects, the yellow phosphorus gas volatilized in the first ash silo can be realized again to import in yellow phosphorus gas cleaning unit by the gas flow direction in yellow phosphorus gas cleaning unit accordingly and carry out next step transmission, so also just achieve by the solid yellow phosphorus in dust after deriving in the mode of gaseous state yellow phosphorus, not only can realize carrying out gas solid separation by between gaseous state yellow phosphorus and dust, but also achieve gaseous state yellow phosphorus is imported in yellow phosphorus gas cleaning unit again, the raw material conversion efficiency in yellow phosphorus preparation technology can be improved.
Further, described first ash silo lower end is connected with the second ash silo, and this second ash silo is provided with heat-insulation layer; This second ash silo and the first ash silo junction are provided with ash-valve and ash releasing tube, and the second ash silo lower end is provided with unloading valve and ash-unloading tube.Thus accordingly can at dust after the furnace run of the first ash silo, dust in first ash silo can be entered in the second ash silo and further be incubated cooling, accordingly, can by carrying out an insulation cooling relatively relaxed in the second ash silo to the THICKNESS CONTROL of heat-insulation layer and the control realization dust of temperature retention time.Such first can guarantee that the temperature of dust itself is lower, can not cause danger and destruction by environment to external world; Second can prevent dust quick refrigeration and be condensed into block to its cleaning and transport bring inconvenience; 3rd also can utilize waste heat further to be cleared up by the yellow phosphorus remained in dust.After such processing step, the dust obtained has very high friendly degree to environment, eliminates the generation of mud phosphorus, and can directly carry out toppling over, bury or utilizing as breeze secondary.In addition, by being provided with the second ash silo in the first ash silo lower end, achieving the multistep treatment to dust, separately processing to the heating of dust and insulation cooling in different processing equipment, effectively can improve the work efficiency in technique.Accordingly, second ash silo and the first ash silo junction are provided with ash-valve and ash releasing tube, and the second ash silo lower end is provided with unloading valve and ash-unloading tube, thus control dust working process between, and can be implemented in leakproofness necessary in above-mentioned insulation cooling process.
Meanwhile, between the first ash silo and the second ash silo, be communicated with the equalizing pipe for equilibrium of pressure.Owing to needing that the dust in the first ash silo is entered the second ash silo, so be provided with the equalizing pipe for equilibrium of pressure between the first ash silo and the second ash silo, this be in order to the first ash silo in the second ash silo, enter dust time, cause by opening this equalizing pipe and namely can avoiding occurring difference of pressure between the first ash silo and the second ash silo dust to stagnate cannot move, between the first ash silo and the second ash silo, be provided with equalizing pipe namely can address this problem preferably.Thus by said structure, the dust after the first ash silo furnace run successfully can be drained into the second ash silo.
Meanwhile, material level observation device is provided with in the first ash silo.In said structure, by observing the material level of dust in the first ash silo, thus realize detecting for dust total amount in the ash discharge structure of yellow phosphorus gas cleaning unit this, avoid treated dust too much or very few, also can realize carrying out monitoring optimization to the amount of dust in the second ash silo simultaneously.
Again preferably, described material level observation device adopts the detector unit being arranged on the first ash silo inwall, and wherein the first ash silo comprises at least two detector units, is wherein positioned at the cavity vertical dimension of the first ash silo in the first ash silo
position is provided with the first detector unit, and the cavity vertical dimension 200mm ~ 1000mm position being positioned at the first ash silo is provided with the 3rd detector unit.Detected by the detector unit of the inwall being arranged on the first ash silo, thus when detecting that the temperature of this position on inwall obviously rises or declines, the material level of dust in ash silo can be judged.This mode only needs detector unit, so structure is simple, cost is very low, economical and practical, and the ash silo in hot environment, easily there is sticky wall and airborne dust in ash silo, cannot carry out material level judgement by directly observing, alternate manner is as higher in costs such as laser detection, use is complicated, and accuracy and the practicality of the observation of its material level are also undesirable.And by above-mentioned material level observation process to the dust charge level height observation in the first ash silo, realize the control to Dust Capacity in the first ash silo, thus realize controlling the Dust Capacity in whole ash silo.As described in above-mentioned technique, through Practical experiments, when wherein yellow phosphorus gas cleaning unit passes into dust in the first ash silo, vertical dimension in the cavity the first ash silo being detected
when position temperature obviously raises, then yellow phosphorus gas cleaning unit is stopped to continue to pass into dust toward the first ash silo; When first ash silo discharges dust in the second ash silo, when vertical dimension 200mm ~ 1000mm position temperature obviously reduces in the cavity the first ash silo being detected, then the first ash silo is stopped to continue to discharge dust toward the second ash silo; This is a kind of optimal control passing into the dust in the first ash silo and discharge, thus realize the optimal control of Dust Capacity in the first ash silo, and then by this optimal control to Dust Capacity in the first ash silo, realize the optimal control to the Dust Capacity in whole ash silo, avoid the dust in ash silo too much or very few.
By said structure, be a kind of easy and simple to handle, safely and effectively removal structure carried out to the yellow phosphorus in dust, realize without phosphatization in dust, also effectively can improve the phosphorus conversion ratio of raw material to finished product simultaneously, improve production efficiency; After testing, the dust after said structure process, its phosphorus content can be down to less than 3%, arranges and can be down to less than 1%.In the treating process in later stage, the phosphorus content in dust has been low to moderate the harm of human body very little, also without the need to remaking special protective treatment because of the comb. of yellow phosphorus again, reduces the processing cost of dust, and the pollution reducing dust improves the friendly degree to environment.Achieve impurity dust in phosphorus production industry and no longer produce mud phosphorus and the important breakthrough that becomes dry dust phosphorous hardly.
Below in conjunction with the drawings and specific embodiments, the present invention is described further.The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Fig. 1 is the composition schematic diagram of the ash discharge structure for yellow phosphorus gas cleaning in the application.
Fig. 2 is the connection diagram of the ash discharge structure for yellow phosphorus gas cleaning in the application.
In the attached body of specification sheets, each structure is respectively with the corresponding of numbering:
101 is the first ash silo, and 102 is the second ash silo, and 201 is ash releasing tube; 202 is ash-valve, and 203 is heating and thermal insulation cover, and 204 is hot-water line; 301 is ash-unloading tube, and 302 is unloading valve, and 401 is the first detector unit; 402 is the second detector unit, and 403 is the 3rd detector unit, and 404 is the 4th detector unit; 501 is inwall injection tube, and 502 is upper and lower injection tube, and 503 is gas-filled protective pipe; 6 is equalizing pipe, and 7 is device for recovering powder, and 8 is yellow phosphorus gas cleaning unit.
Detailed description of the invention
As shown in Figure 2, the ash discharge structure installment for yellow phosphorus gas cleaning in the present embodiment is between the yellow phosphorus gas cleaning unit 8 and device for recovering powder 7 of phosphorus production system, wherein the bottom of yellow phosphorus gas cleaning unit 8 is connected with dust collecting, this dust collecting is the cone-shaped cavity being connected to yellow phosphorus gas cleaning unit 8 bottom, and the top of cone-shaped cavity is provided with opening to be connected with yellow phosphorus gas cleaning unit 8, also realized the collection of dust by this opening simultaneously.As shown in Figure 1, the described dust collecting being positioned at yellow phosphorus gas cleaning unit 8 bottom is the first ash silo 101 of cone-shaped cavity, wherein the upper end of the first ash silo 101 is connected with the opening that yellow phosphorus gas cleaning unit 8 passes into dust, so this opening is simultaneously also as the exhaust structure of the first ash silo 101.In first ash silo 101, temperature control element is installed, can the temperature environment in the first ash silo 101 cone-shaped cavity be controlled by temperature control element.First ash silo 101 lower end is provided with ash discharging hole, and described ash discharging hole is made up of the ash-valve 202 of the ash releasing tube 201 and this ash releasing tube 201 of control that are connected to cone-shaped cavity lower end; And heating and thermal insulation cover 203 is installed on ash releasing tube 201 outer wall, is provided with for the hot-water line 204 during overhaul of the equipments at the top end position of ash releasing tube 201 simultaneously; And ash-valve 202 adopts two flap valve or bispin rotary valve.The auxiliary soot blower for preventing dust bridge and blocking cavity is provided with in the first ash silo 101, described auxiliary soot blower comprises inwall injection tube 501 and upper and lower injection tube 502, wherein inwall injection tube 501 is arranged horizontally the endless tube on the first ash silo 101 sidewall, this endless tube is connected with the first ash silo 101 sidewall the interface that four pass into ash silo, the interface passing into ash silo by this carries out inwall annular blast to ash silo sidewall, builds bridge or stick on grey bulkhead to avoid dust in ash silo; Be provided with upper and lower injection tube 502 simultaneously, this upper and lower injection tube 502 adopts the shower nozzle arranging upper and lower nozzle in the lower end ash discharging hole central authorities of cone-shaped cavity, thus the dust that ash discharging hole is assembled can be stirred, destroyed, ash discharging hole is dredged fully, prevents dust from blocking; Above-mentioned auxiliary soot blower employing application number is the yellow phosphorus gas cleaning unit 8 ash discharge auxiliary device in the utility model patent of 2013206812136.In the present embodiment, the gas passed in above-mentioned auxiliary soot blower is nitrogen.In the first ash silo 101 inwall, be positioned at cone-shaped cavity vertical dimension
position be provided with the first detector unit 401, be positioned at cone-shaped cavity vertical dimension 300mm position and be provided with the 3rd detector unit 403, between the first detector unit 401 and the 3rd detector unit 403, be provided with the second detector unit 402 simultaneously.
Above-mentioned first ash silo 101 is sealedly connected with second cone-shaped cavity by lower end ash discharging hole, and this cone-shaped cavity is the second ash silo 102.In the present embodiment, the second ash silo 102 volume is 0.5 ~ 0.8m
3, and the second ash silo 102 outer wall is provided with certain heat-insulation layer, occurs caking and wall sticking phenomenon to prevent dust from occurring quick refrigeration in the second ash silo 102.Between second ash silo 102 and the first ash silo 101, equalizing pipe 6, second ash silo 102 be communicated with for equilibrium of pressure is connected with gas-filled protective pipe 503, is positioned at the second ash silo 102 simultaneously and is provided with the 4th detector unit 404 in position on lower side.This second ash silo lower end is provided with cinder-discharging port, and this cinder-discharging port is made up of the unloading valve 302 of the ash-unloading tube 301 and this ash-unloading tube 301 of control that are connected to cone-shaped cavity lower end, can be provided with the injection tube up and down 502 preventing from blocking cavity in ash-unloading tube 301; And unloading valve 302 adopts single flap valve or rotovalve.
Be positioned at above-mentioned second ash silo 102 cinder-discharging port lower end and be provided with device for recovering powder 7, this device for recovering powder 7 can be adopt container as centralized collection, driven by motor cinder conveyer also can be set dust is delivered to the external world, in the present embodiment, device for recovering powder 7 selects cinder conveyer that dust is delivered to the external world.Device for recovering powder 7, when collecting dust, can carry out water spray and add wet treatment, to prevent reentrainment of dust contaminated environment.
In the present embodiment, all devices, pipeline, valve all do anticorrosion, insulation protective treatment.
Composition graphs 1 and Fig. 2, the ash discharge technique for yellow phosphorus gas cleaning on the basis of said structure comprises the steps:
Control ash-valve 202 ash discharging hole of the first ash silo 101 lower end is closed, dust in yellow phosphorus gas cleaning unit 8 is passed into the first ash silo 101, pass in the process of the first ash silo 101 at dust, when the temperature observing that the second detector unit 402 detects obviously raises, slow down the speed that yellow phosphorus gas cleaning unit 8 passes into dust in the first ash silo 101, when observing that the 3rd detector unit 403 obviously raises, yellow phosphorus gas cleaning unit 8 is stopped to continue to pass into dust in the first ash silo 101; In the present embodiment, when vertical dimension in the first ash silo 101
the first detector unit 401 of position detect temperature generation significant change time, now in the first ash silo 101, actual dust volume is about 0.3 ~ 0.6m
3, before treated, the yellow phosphorus contained in these dust accounts for 8 ~ 10% of dust total mass.
By temperature control element, the temperature in the first ash silo 101 is controlled at about 250 DEG C, and the adjustment can carrying out to a certain degree according to the change of time of heat, thus realize by dust in the first ash silo 101 with yellow phosphorus evaporate from dust in a gaseous form, and then the opening that gaseous state yellow phosphorus is tightly connected by the first ash silo 101 upper end and yellow phosphorus gas cleaning unit 8 comes back in yellow phosphorus gas cleaning unit 8.And inwall injection tube 501 pairs of dust that can start in the first ash silo 101 carry out suitable inwall annular blast there is wall sticking phenomenon to prevent dust at the first ash silo 101 inwall, also can accelerate the dust air speed in the first ash silo 101, the solid yellow phosphorus accelerating to mix in dust is discharged with the form of gaseous state yellow phosphorus simultaneously.
Control dust in the first ash silo 101 to be vented 2 hours under 250 DEG C of temperature environments, when after stopping heating, open the ash-valve 202 of the first ash silo 101 lower end, dust is entered the second ash silo 102 by the ash releasing tube 201 be connected with the second ash silo 102 from the first ash silo 101.
Dust now after above-mentioned PROCESS FOR TREATMENT, yellow phosphorus wherein accounts for dust total mass less than 1%.
Before above-mentioned first ash silo 101 of beginning operates to the second ash silo 102 ash discharge; the unloading valve 302 of the second ash silo 102 lower end is needed to close; and first to the nitrogen passing into q.s in the second ash silo 102, this is passed into nitrogen procedure and is completed by the gas-filled protective pipe 503 that the second ash silo 102 connects.And needed the equalizing pipe 6 by the first ash silo 101 is connected with the second ash silo 102 to open (equalizing pipe is in closure state before this) before ash-valve 202 is opened, thus the pressure between balance the first ash silo 101 and the second ash silo 102.
When ash-valve 202 is opened, the 503 pairs of ash discharging holes of injection tube up and down started in the first ash silo 101 are jetted up and down, ash discharging hole is blocked to prevent dust, now in the first ash silo, the inwall injection tube 501 of 101 is also opening, cannot enter the second ash silo 102 to prevent dust at the sticky wall of the first ash silo 101 inwall appearance or arch formation.And on ash releasing tube 201 outer wall that the first ash silo 101 is connected with the second ash silo 102, be provided with heating and thermal insulation overlap 203, to prevent dust quick refrigeration and occur sticky wall in ash releasing tube 201, block ash releasing tube 201.
After ash-valve 202 is opened, the dust in the first ash silo 101 is discharged to the second ash silo 102, when observing the temperature generation significant change that the second detector unit 402 detects, slows down ash discharge speed by ash-valve 202; When observing the temperature generation significant change that the 3rd detector unit 403 detects, closing ash-valve 202 and stopping ash discharge.
After dust enters the second ash silo 102, again equalizing pipe is placed in closure state, dust is carried out insulation cooling 0.5 hour in the second ash silo 102, now in the second ash silo 102, the temperature of dust is about about 60 DEG C, its phosphorus content also environmentally safe, can directly discharge.
Stop restarting protective tube 503 afterwards and pass into nitrogen in the second ash silo 102, open cinder-discharging port by unloading valve, the dust in the second ash silo 102 is discharged, collect dust by the device for recovering powder 7 of the second ash silo 102 lower end and be delivered to extraneous unified process.
Dust is after the process of above-mentioned technique, can reach the degree of directly toppling over, burying or utilizing as breeze secondary, no matter now the yellow phosphorus content in dust or the temperature of dust, all without the need to carrying out subsequent treatment again, be a kind of environment friendly and pollution-free dust high to environment friendliness degree.
Finally, in the present embodiment, be provided with for the hot-water line 204 during overhaul of the equipments at the top end position of ash releasing tube 201, when above-mentioned ash discharge arrangement works a period of time for yellow phosphorus gas cleaning overhauls, cleaned by the parts in this hot-water line 204 pairs of ash discharge structures.
Claims (10)
1. for the ash discharge technique of yellow phosphorus gas cleaning, comprise yellow phosphorus gas gas solid separation is filtered out dust accumulation, then carry out to the outside of yellow phosphorus gas cleaning unit (8) discharging and the process of subsequent delivery, it is characterized in that: take in said process to heat described dust thus the solid yellow phosphorus in dust gasified volatilize and make the gaseous state phosphorus that volatilizes and solid-state dust realize the operation of shunting.
2. as claimed in claim 1 for the ash discharge technique of yellow phosphorus gas cleaning, it is characterized in that: said process comprise be provided with the first ash silo (101) be positioned at yellow phosphorus gas cleaning unit (8) lower end collect dust, wherein be provided with exhausr port in the first ash silo (101) to be connected with yellow phosphorus gas cleaning unit (8), dust is arranged in this first ash silo (101) and is heated to 200 DEG C ~ 280 DEG C, and time of heat is 1 ~ 4 hour.
3., as claimed in claim 2 for the ash discharge technique of yellow phosphorus gas cleaning, it is characterized in that: dust is heated to 240 DEG C ~ 260 DEG C in the first ash silo (101), time of heat is 2 ~ 2.5 hours.
4., as claimed in claim 2 for the ash discharge technique of yellow phosphorus gas cleaning, it is characterized in that: dust after stopping heating, be incubated cooling more than 0.5 hour, dust temperature falls in less than 90 DEG C.
5. as claimed in claim 4 for the ash discharge technique of yellow phosphorus gas cleaning, it is characterized in that: be positioned at the first ash silo (101) lower end and be provided with the second ash silo (102), dust is entered in the second ash silo (102) carry out insulation cooling 0.5 ~ 1 hour, temperature is down to less than 70 DEG C.
6. as claimed in claim 5 for the ash discharge technique of yellow phosphorus gas cleaning, it is characterized in that: between the first ash silo (101) and the second ash silo (102), be provided with the ash discharging hole that ash-valve (202) and ash releasing tube (201) form, second ash silo (102) lower end is provided with the cinder-discharging port be connected with the external world, and this cinder-discharging port comprises unloading valve (302) and ash-unloading tube (301):
Yellow phosphorus gas cleaning unit (8) passes into before dust to the first ash silo (101) and dust carries out in heat process in the first ash silo (101), controls ash-valve (202) and is closed by ash discharging hole;
Dust the first ash silo (101) through heating after, nitrogen or noble gas is passed into in the second ash silo (102), and the cinder-discharging port controlled in the second ash silo (102) is in closure state, and the equalizing pipe (6) be provided with between the first ash silo (101) and the second ash silo (102) for equilibrium of pressure, open equalizing pipe (6), control ash discharging hole by ash-valve (202) afterwards to open, dust is entered the second ash silo (102);
After dust in the first ash silo (101) enters the second ash silo (102), close ash discharging hole, dust is placed in the second ash silo (102) insulation cooling;
After completing the second ash silo (102) insulation cooling down operation, closed equalizing pipe (6), stops passing into nitrogen or noble gas, then controls ash-valve (202) and open and be discharged outside to by dust;
Wherein carry out isothermal holding and/or furnace run in described ash releasing tube (201).
7. as claimed in claim 5 for the ash discharge technique of yellow phosphorus gas cleaning, it is characterized in that: in the first ash silo (101), be provided with temperature-detecting device, completing material level observation by detecting the change of temperature in the first ash silo (101); When wherein yellow phosphorus gas cleaning unit (8) passes into dust in the first ash silo (101), the first ash silo (101) interior vertical dimension detected
when position temperature obviously raises, then yellow phosphorus gas cleaning unit (8) is stopped to continue to pass into dust toward the first ash silo (101); When first ash silo (101) discharges dust in the second ash silo (102), when detecting that the interior vertical dimension 200mm ~ 1000mm position temperature of the first ash silo (101) obviously reduces, then the first ash silo (101) is stopped to continue to discharge dust toward the second ash silo (102); Be provided with the auxiliary soot blower be connected with the first ash silo (101) and/or the second ash silo (102), this auxiliary soot blower comprises carrying out inwall annular blast in warehouse and jetting up and down two techniques to lower end dust outlet in warehouse.
8. for the ash discharge structure of yellow phosphorus gas cleaning, include and yellow phosphorus is carried out the yellow phosphorus gas cleaning unit (8) that gas solid separation realizes purification, it is characterized in that: described yellow phosphorus gas cleaning unit (8) is connected with dust collecting, the heater element making the solid yellow phosphorus in dust carry out heating volatilization is included in this dust collecting, and for carrying out the exhausr port of gas solid separation.
9. as claimed in claim 8 for the ash discharge structure of yellow phosphorus gas cleaning, it is characterized in that: described dust collecting is the first ash silo (101), this first ash silo (101) is for being connected to yellow phosphorus gas cleaning unit (8) lower end and and being provided with exhausr port between yellow phosphorus gas cleaning unit (8).
10., as claimed in claim 9 for the ash discharge structure of yellow phosphorus gas cleaning, it is characterized in that: described first ash silo (101) lower end is connected with the second ash silo (102), and this second ash silo (102) is provided with heat-insulation layer; This second ash silo (102) and the first ash silo (101) junction are provided with ash-valve (202) and ash releasing tube (201), and the second ash silo (102) lower end is provided with unloading valve (302) and ash-unloading tube (301); And the first ash silo (101) and the second ash silo (102) are connected with blowing device, this blowing device includes and the auxiliary soot blower be connected in the first ash silo (101) and the gas-filled protective pipe (503) that be connected middle with the second ash silo (102); And the equalizing pipe (6) be communicated with between the first ash silo (101) and the second ash silo (102) for equilibrium of pressure; First ash silo is provided with material level observation device in (101); Described material level observation device adopts the detector unit being arranged on the inwall of the first ash silo (101), wherein the first ash silo (101) comprises at least two detector units, is wherein positioned at cone-shaped cavity vertical dimension in the first ash silo (101)
position is provided with the first detector unit (401), is positioned at cone-shaped cavity vertical dimension 200mm ~ 1000mm position and is provided with the 3rd detector unit (403).
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