CN103332494A - Pneumatic conveying method for removing dust and crude ash in dry process of converter once flue gas - Google Patents
Pneumatic conveying method for removing dust and crude ash in dry process of converter once flue gas Download PDFInfo
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- CN103332494A CN103332494A CN2013102679597A CN201310267959A CN103332494A CN 103332494 A CN103332494 A CN 103332494A CN 2013102679597 A CN2013102679597 A CN 2013102679597A CN 201310267959 A CN201310267959 A CN 201310267959A CN 103332494 A CN103332494 A CN 103332494A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000000428 dust Substances 0.000 title claims abstract description 34
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title abstract description 6
- 239000003546 flue gas Substances 0.000 title abstract description 6
- 238000001035 drying Methods 0.000 title abstract 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 86
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 43
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 238000003860 storage Methods 0.000 claims abstract description 17
- 238000005243 fluidization Methods 0.000 claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000003818 cinder Substances 0.000 claims description 84
- 239000003517 fume Substances 0.000 claims description 20
- 238000010926 purge Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 11
- 238000009736 wetting Methods 0.000 claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- 239000004568 cement Substances 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000005261 decarburization Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 230000005012 migration Effects 0.000 claims description 3
- 238000013508 migration Methods 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 230000009885 systemic effect Effects 0.000 claims description 3
- 230000009466 transformation Effects 0.000 abstract description 2
- 235000002918 Fraxinus excelsior Nutrition 0.000 abstract 1
- 244000181980 Fraxinus excelsior Species 0.000 abstract 1
- 238000007664 blowing Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000010408 sweeping Methods 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 4
- 239000000571 coke Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a pneumatic conveying method for removing dust and crude ash in a dry process of converter once flue gas. The method comprises the following steps of S1, constructing a pneumatic conveying system for removing dust and crude ash in the dry process of converter once flue gas; S2, feeding: a signal is sent when a material level meter (3) detects crude ash in a lower funnel of an evaporative cooling tower (1) reaching an upper limit, ash is discharged into a cabin pump (10), and a vibrating and striking device (2) works; S3, fluidization: a pneumatic ball valve (15) is started, nitrogen enters into a first fluidization device in the cabin pump (10) from a gas storage tank (14); S4, conveying: after a second pneumatic double-gate plate valve (16) is opened, the uniformly fluidized gas and ash mixture is conveyed into a crude ash cabin (18) through a pneumatic conveying pipe (17); S5, blowing and sweeping, and S6, moving by transportation. By adopting the method, a common ash transportation cart can be used for transporting ash, the investment is greatly lowered, and the cost is saved. The method solves the problem that the height of the evaporative cooling tower is limited during the transformation of dust removal in the dry process, the method is particularly suitable for the project that dust removal of once flue gas in a converter via a wet process is transformed into a dry process, and the method has wide application prospect.
Description
Technical field
The present invention relates to the environmental protection field, more particularly, relate to a dry fume dedusting of a kind of converter cinder pneumatic conveying method.
Background technology
Along with the continuous reinforcement of environmental consciousness, flue gas of converter newly-built and reconstruction mostly adopts dry method dust.The cinder that wet cooling tower below banana-bends is collected is delivered to cinder storehouse in the converter main building by built-in chain-linked conveyer, pneumatic push-pull valve and pneumatic double-deck flap valve under the gravity effect, transported outward by automobile behind the humidification.
The problem that a dry fume dedusting of existing converter cinder delivery system mainly exists: the one, built-in chain-linked conveyer fault rate height, often the card ash has a strong impact on the converter ordinary production; The 2nd, the cinder storehouse is located in the converter main building, often is subjected to the restriction of process for making arrangement condition, consider the fortune ash passage of automobile turnover, has taken a large amount of interior spaces; The 3rd, each price of vacuum suction and discharge tank car is invested higher about 1,000,000 yuan.
Summary of the invention
The technical problem to be solved in the present invention is, at the above-mentioned defective of prior art, provides a dry fume dedusting of a kind of converter cinder pneumatic conveying method.
The technical solution adopted for the present invention to solve the technical problems is: construct a dry fume dedusting of a kind of converter cinder pneumatic conveying method, may further comprise the steps:
S1, a dry fume dedusting of structure converter cinder air-transport system, it comprises wet cooling tower, ash-unloading tube, storehouse pump, pneumatic carrier and the cinder storehouse that connects successively; Be provided with level-sensing device and rapping apparatus in the wet cooling tower; Described ash-unloading tube is provided with pneumatic push-pull valve and the first pneumatic double-gate plate valve; Pump top, described storehouse is provided with the first vacuum pressure Dump valve; Described pneumatic carrier is connected with storage tank, and the entrance of described storage tank is connected with first nitrogen tube, and the entrance of described first nitrogen tube links to each other with nitrogen header pipe; Described storehouse pump links to each other by pneumatic carrier with the cinder storehouse, and described pneumatic carrier is provided with the second pneumatic double-gate plate valve, and pump bottom in described storehouse is provided with the first class device; The nitrogen tube of described storage tank outlet is divided into two-way, and one the tunnel is connected with described first class device, and another road is connected with described pneumatic carrier, is provided with pneumatic ball valve between described storage tank and the storehouse pump; Bag dust collector and the second vacuum pressure Dump valve are established in top, described cinder storehouse, be provided with second fluidizer in the awl bucket under the described cinder storehouse, the cinder-discharging port of the following awl bucket of bottom, described cinder storehouse links to each other with the second manual push-pull valve entrance, and the described second manual push-pull valve outlet links to each other with dust wetting stirrer entrance; The outlet of described dust wetting stirrer links to each other by ash releasing tube with the canvas hose entrance; Described nitrogen header pipe also links to each other with the second nitrogen tube entrance, and the outlet of described second nitrogen tube is divided into two-way, and one the tunnel is connected another Lu Yucang top bag dust collector connection with fluidizer; Establish pressure regulating valve and electromagnetic valve between second nitrogen tube and the fluidizer;
S2, charging: level-sensing device detects and sends signal when the cinder in the awl bucket reaches upper limit under the wet cooling tower, beginning is unloaded ash to the storehouse pump, pneumatic push-pull valve and the first pneumatic double-gate plate valve are opening, pneumatic ball valve and the second pneumatic double-gate plate valve are closed, rapping apparatus work, cinder enters the storehouse pump under the gravity effect, when level-sensing device that the storehouse pump carries detect material full after, send signal and pass through the PLC programming control, automatically close the first pneumatic double-gate plate valve and the 3rd pneumatic double-gate plate valve, fill process finishes;
S3, fluidisation: pneumatic ball valve is opened, nitrogen enters first class device in the pump of storehouse from storage tank, the abundant fluidisation of cinder in the pump of storehouse, pressure constantly raises, when pressure rises to the setting operation pressure, by the PLC programming control, open the second pneumatic double-gate plate valve at pump side portion discharging opening place, storehouse automatically, fluid mapper process finishes;
S4, conveying: after the second pneumatic double-gate plate valve was opened, the uniform gas ash of fluidisation compound was delivered to the cinder storehouse by pneumatic carrier, and the interior pressure of storehouse pump this moment keeps stable; After the ash of the gas in the pump of storehouse compound had been carried, the resistance of pneumatic carrier descended, and the pressure of pneumatic carrier begins to reduce, when being reduced to the threshold pression of setting, then course of conveying finishes, and enters purge, and this moment, pneumatic ball valve and the second pneumatic double-gate plate valve still remained on opening;
S5, purging: nitrogen continues purge bin pump and pneumatic carrier, the interior no flying dust of storehouse pump this moment, gas ash compound in the pneumatic carrier reduces gradually, almost all be nitrogen at last, systemic resistance continues to descend and after a period of stabilisation, purge finishes, and closes pneumatic ball valve and the second pneumatic double-gate plate valve, open the first pneumatic double-gate plate valve and the 3rd pneumatic double-gate plate valve then, the storehouse pump recovers feed state;
S6, migration: open electromagnetic valve, nitrogen feeds in second fluidizer, and the fluidisation cinder is opened the second manual push-pull valve, behind the cinder process dust wetting stirrer humidification in the cinder storehouse, joins in the bulk cement truck by ash releasing tube and canvas hose.
Among the step S2 in a dry fume dedusting of converter of the present invention cinder pneumatic conveying method, send signal when the level-sensing device in the wet cooling tower detects when the cinder in the awl bucket unloads to lower limit under the wet cooling tower, stop to unload ash to the storehouse pump.
In a dry fume dedusting of converter of the present invention cinder pneumatic conveying method, described converter is decarburization converter or dephosphorization converter or lava homogenizing furnace or corrosion-resistant steel converter.
In a dry fume dedusting of converter of the present invention cinder pneumatic conveying method, the nitrogen pressure 〉=0.6MPa that carries among the described step S3-S6.
Implement a dry fume dedusting of converter of the present invention cinder pneumatic conveying method, have following beneficial effect:
1, number of devices and plant maintenance amount have been reduced.Dismountable cover banana-bends and built-in chain-linked conveyer have solved the problem of built-in chain-linked conveyer card ash, have reduced equipment failure rate, have ensured the converter ordinary production.
2, the cinder storehouse both can be placed in the converter main building, also can be placed on outside the converter main building, and storage ash and fortune ash are not subjected to the restriction of place and distance.
3, after the present invention adopts the dust wetting stirrer, can adopt common bulk cement truck fortune ash, reduce investment greatly, save cost.
The height-limited problem of wet cooling tower when 4, the invention solves the dry method dust transformation especially is fit to flue-gas wet dust removal of converter and changes the dry method dust project, has a extensive future.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of the cinder air-transport system in a dry fume dedusting of the converter of the present invention cinder pneumatic conveying method.
The specific embodiment
Understand for technical characterictic of the present invention, purpose and effect being had more clearly, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
A dry fume dedusting of a kind of converter of the present invention cinder pneumatic conveying method comprises step S1-S6, and is specific as follows:
S1, a dry fume dedusting of structure converter cinder air-transport system, as shown in Figure 1, it comprises wet cooling tower 1, ash-unloading tube 4, storehouse pump 10, pneumatic carrier 17 and the cinder storehouse 18 that connects successively.
The following awl bucket of wet cooling tower 1 is used for capturing the cinder of raw coke oven gas, is provided with level-sensing device 3 and rapping apparatus 2 in the wet cooling tower 1.Can detect cinder amount in the wet cooling tower 1 by level-sensing device 3, can guarantee that by rapping apparatus 2 cinder can fall in the ash-unloading tube 4 smoothly, prevent from stopping up.Storehouse pump 10 is installed in the below of wet cooling tower 1, and the cinder-discharging port of the following awl bucket of wet cooling tower 1 is connected by ash-unloading tube 4 with storehouse pump 10 entrances, and ash-unloading tube 4 is provided with pneumatic push-pull valve 5 and the first pneumatic double-gate plate valve 6.When pneumatic push-pull valve 5 and the first pneumatic double-gate plate valve 6 were opened, the cinder of wet cooling tower 1 inside fell in the storehouse pump 10 by ash-unloading tube 4.The top of storehouse pump 10 is provided with the first vacuum pressure Dump valve 12, prevents that pump 10 internal pressures in storehouse are excessive.
Pneumatic carrier 17 is connected with storage tank 14, and the entrance of storage tank 14 is connected with first nitrogen tube 13, and the entrance of first nitrogen tube 13 links to each other with nitrogen header pipe.Storehouse pump 10 links to each other by pneumatic carrier 17 with cinder storehouse 18, and pneumatic carrier 17 is provided with the second pneumatic double-gate plate valve 16, and pump 10 bottoms in storehouse are provided with the first class device.
The nitrogen tube of storage tank 14 outlet is divided into two-way, and one the tunnel is connected with the first class device, and another road is connected with pneumatic carrier 17, is provided with pneumatic ball valve 15 between storage tank 14 and the storehouse pump 10.
Nitrogen header pipe also links to each other with second nitrogen tube, 27 entrances, and the outlet of second nitrogen tube 27 is divided into two-way, and one the tunnel is connected another Lu Yucang top bag dust collector 19 connections with second fluidizer 30.Establish pressure regulating valve 28 and electromagnetic valve 29 between second nitrogen tube 27 and second fluidizer 30.
S2, charging: level-sensing device 3 detects and sends signal when 1 time interior cinder of awl bucket of wet cooling tower reaches upper limit, beginning is unloaded ash to storehouse pump 10, pneumatic push-pull valve 5 and the first pneumatic double-gate plate valve 6 are opening, pneumatic ball valve 15 and the second pneumatic double-gate plate valve 16 are closed, cinder enters storehouse pump 10 under the gravity effect, when level-sensing device that storehouse pump 10 carries detect material full after, send signal and by the PLC programming control, automatically close the first pneumatic double-gate plate valve 6, fill process finishes.Pressure in the storehouse pump 10 can influence charging when excessive, and can open the first vacuum pressure Dump valve 12 this moment.The dust-laden raw coke oven gas is during by wet cooling tower 1 time awl bucket owing to flow to the variation that takes place more than 90 °, under gravity and action of centrifugal force, the crude particle dust of 25%～35% (being generally 30%) under bore the bucket place and be captured; The crude particle dust temperature is 200～300 ℃ (being generally 250 ℃); Crude particle dust bulk density 1.8～2.6t/m
3Crude particle dust water ratio 3%～5%.
S3, fluidisation: pneumatic ball valve 15 is opened, nitrogen enters first class device in the storehouse pump 10 from storage tank 14, the abundant fluidisation of cinder in the storehouse pump 10, pressure constantly raises, when pressure rises to the setting operation pressure, by the PLC programming control, open the second pneumatic double-gate plate valve 16 at storehouse pump 10 sidepiece discharging opening places automatically, fluid mapper process finishes.
S4, conveying: after the second pneumatic double-gate plate valve 16 was opened, the uniform gas ash of fluidisation compound was delivered to cinder storehouse 18 by pneumatic carrier 17, and this moment, pump 10 interior pressure in storehouse kept stable; After the ash of the gas in the storehouse pump 10 compound has been carried, the resistance of pneumatic carrier 17 descends, the pressure of pneumatic carrier 17 begins to reduce, when being reduced to the threshold pression of setting, then course of conveying finishes, enter purge, this moment, pneumatic ball valve 15 and the second pneumatic double-gate plate valve 16 still remained on opening.Pressure in the cinder storehouse 18 can influence charging when excessive, and can open the second vacuum pressure Dump valve 20 this moment.
S5, purging: nitrogen continues purge bin pump 10 and pneumatic carrier 17, no flying dusts in this moment storehouse pump 10, gas ash compound in the pneumatic carrier 17 reduces gradually, almost all be nitrogen at last, systemic resistance continues to descend and after a period of stabilisation, purge finishes, and closes pneumatic ball valve 15 and the second pneumatic double-gate plate valve 16, open the first pneumatic double-gate plate valve 6 then, storehouse pump 10 recovers feed state.
S6, migration: open electromagnetic valve 29, nitrogen feeds in second fluidizer 28, and the fluidisation cinder is opened the second manual push-pull valve 21, behind cinder process dust wetting stirrer 22 humidifications in the cinder storehouse 18, join in the bulk cement truck by ash releasing tube 23 and canvas hose 24.Unload ash and can adopt common bulk cement truck fortune ash, cost is low.Second fluidizer 38 spray low-pressure nitrogens can reduce the temperature of cinders in the cinder storehouse 18, also can the fluidisation cinders, be convenient to unload ash.Can regulate the feeding amount of nitrogen by pressure regulating valve 28.The cinder that top, storehouse bag dust collector 19 is collected is delivered to 18 bottoms, cinder storehouse by second nitrogen tube 27, guarantees the cinder discharging fully fast in the cinder storehouse 18, reduces residual.
Storehouse pump 10 among the present invention adopts and is interrupted the mode of carrying, and cinder of every conveying is a cyclic process, and each circulation comprises S2-S5 totally 4 steps.
Further, in step S2, the cinder in the level-sensing device 3 in the wet cooling tower 1 detects 1 time awl bucket of wet cooling tower sends signal when unloading to lower limit, stops to unload ash to storehouse pump 10.Ash envelope in 1 time awl bucket of wet cooling tower can prevent that coal gas is excessive, ash envelope height 800～1000mm.
Further, the pumped (conveying) medium among the step S3-S6 adopts low-pressure nitrogen, nitrogen pressure 〉=0.6MPa.
Further, can bore bucket under wet cooling tower arranges the first accident ash-unloading tube, 7, the first accident ash-unloading tubes 7 and is provided with the first manual push-pull valve 9.During 10 maintenance of storehouse pump, cinder is discharged through 1 time awl of wet cooling tower bucket accident cinder-discharging port, the first accident ash-unloading tube 7 and the first manual push-pull valve 9.Be provided with connection pipe 8 between ash-unloading tube 4 and the first accident ash-unloading tube 7, be mainly used to get rid of the accident ponding in 1 time awl bucket of wet cooling tower.Pump 10 bottoms in storehouse also can arrange drain hose, are used for discharging the ponding in the storehouse pump 10.
Further, can be in the cinder storehouse 18 times awl buckets the second accident ash-unloading tube, 25, the second accident ash-unloading tubes 25 be set be provided with the 3rd manual push-pull valve 26.When overhauled in cinder storehouse 18,18 times through cinder storehouse awls of cinder bucket accident cinder-discharging port, the second accident ash-unloading tube 25 and the 3rd manual push-pull valve 26 were discharged.
Further, can at wet cooling tower 1 manhole be set, easy access.
Further, pump 10 materials in storehouse are 16MnR or Q235B or spheroidal graphite iron or corrosion-resistant steel.Storehouse pump 10 capacity: 1.0～10m
3Storehouse pump 10 quantity 〉=1 can a plurality ofly be used in combination.Pneumatic carrier 17 adopts and contains the manganese solid drawn pipe, elbow, threeway inner liner abrasive resistant stupalith, and pipe bending radius 〉=10 times pipe diameter, pipeline has choke preventing function.
Converter in a dry fume dedusting of the converter of the present invention cinder pneumatic conveying method is defined as: decarburization converter or dephosphorization converter or lava homogenizing furnace or corrosion-resistant steel converter.Method in the present embodiment is applicable to the conveying of a 80t～dry fume dedusting of 300t converter cinder.The about 300m of its fed distance, the about 30m of climb altitude.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (4)
1. a dry fume dedusting of converter cinder pneumatic conveying method is characterized in that, may further comprise the steps:
S1, structure converter dry fume dedusting cinder air-transport system, it comprises the wet cooling tower (1) that connects successively, ash-unloading tube (4), storehouse pump (10), pneumatic carrier (17) and cinder storehouse (18); Be provided with level-sensing device (3) and rapping apparatus (2) in the wet cooling tower (1); Described ash-unloading tube (4) is provided with pneumatic push-pull valve (5) and the first pneumatic double-gate plate valve (6); Described storehouse pump (10) top is provided with the first vacuum pressure Dump valve (12); Described pneumatic carrier (17) is connected with storage tank (14), and the entrance of described storage tank (14) is connected with first nitrogen tube (13), and the entrance of described first nitrogen tube (13) links to each other with nitrogen header pipe; Described storehouse pump (10) links to each other by pneumatic carrier (17) with cinder storehouse (18), and described pneumatic carrier (17) is provided with the second pneumatic double-gate plate valve (16), and described storehouse pump (10) bottom is provided with the first class device; The nitrogen tube of described storage tank (14) outlet is divided into two-way, and one the tunnel is connected with described first class device, and another road is connected with described pneumatic carrier (17), is provided with pneumatic ball valve (15) between described storage tank (14) and the storehouse pump (10); Bag dust collector (19) and the second vacuum pressure Dump valve (20) are established in top, described cinder storehouse (18), described cinder storehouse (18) is provided with second fluidizer (30) in the awl bucket down, the cinder-discharging port of the following awl bucket of bottom, described cinder storehouse (18) links to each other with second manual push-pull valve (21) entrance, and the outlet of the described second manual push-pull valve (21) links to each other with dust wetting stirrer (22) entrance; The outlet of described dust wetting stirrer (22) links to each other by ash releasing tube (23) with canvas hose (24) entrance; Described nitrogen header pipe also links to each other with second nitrogen tube (27) entrance, and described second nitrogen tube (27) outlet is divided into two-way, and one the tunnel is connected another Lu Yucang top bag dust collector (19) connection with second fluidizer (30); Establish pressure regulating valve (28) and electromagnetic valve (29) between second nitrogen tube (27) and the fluidizer (30);
S2, charging: level-sensing device (3) detects and sends signal when the cinder in the awl bucket reaches upper limit under the wet cooling tower (1), beginning is unloaded ash to storehouse pump (10), pneumatic push-pull valve (5) and the first pneumatic double-gate plate valve (6) are opening, pneumatic ball valve (15) and the second pneumatic double-gate plate valve (16) are closed, rapping apparatus (2) work, cinder enters storehouse pump (10) under the gravity effect, when level-sensing device that storehouse pump (10) carries detect material full after, send signal and pass through the PLC programming control, automatically close the first pneumatic double-gate plate valve (6), fill process finishes;
S3, fluidisation: pneumatic ball valve (15) is opened, nitrogen enters the interior first class device of storehouse pump (10) from storage tank (14), the abundant fluidisation of cinder in the storehouse pump (10), pressure constantly raises, when pressure rises to the setting operation pressure, by the PLC programming control, open the second pneumatic double-gate plate valve (16) at storehouse pump (10) sidepiece discharging opening place automatically, fluid mapper process finishes;
S4, conveying: after the second pneumatic double-gate plate valve (16) was opened, the uniform gas ash of fluidisation compound was delivered to cinder storehouse (18) by pneumatic carrier (17), and it is stable that the pressure in storehouse pump this moment (10) keeps; After the ash of the gas in the storehouse pump (10) compound has been carried, the resistance of pneumatic carrier (17) descends, the pressure of pneumatic carrier (17) begins to reduce, when being reduced to the threshold pression of setting, then course of conveying finishes, enter purge, this moment, pneumatic ball valve (15) and the second pneumatic double-gate plate valve (16) still remained on opening;
S5, purging: nitrogen continues purge bin pump (10) and pneumatic carrier (17), no flying dust in storehouse pump this moment (10), gas ash compound in the pneumatic carrier (17) reduces gradually, almost all be nitrogen at last, systemic resistance continues to descend and after a period of stabilisation, purge finishes, and closes pneumatic ball valve (15) and the second pneumatic double-gate plate valve (16), open the first pneumatic double-gate plate valve (6) then, storehouse pump (10) recovers feed state;
S6, migration: open electromagnetic valve (29), nitrogen feeds in second fluidizer (30), the fluidisation cinder, open the second manual push-pull valve (21), behind cinder process dust wetting stirrer (22) humidification in the cinder storehouse (18), join in the bulk cement truck by ash releasing tube (23) and canvas hose (24).
2. a dry fume dedusting of converter according to claim 1 cinder pneumatic conveying method, it is characterized in that, in described step S2, send signal when the level-sensing device (3) in the wet cooling tower (1) detects when the cinder in the awl bucket unloads to lower limit under the wet cooling tower (1), stop to unload ash to storehouse pump (10).
3. a dry fume dedusting of converter according to claim 1 cinder pneumatic conveying method is characterized in that, described converter is decarburization converter or dephosphorization converter or lava homogenizing furnace or corrosion-resistant steel converter.
4. a dry fume dedusting of converter according to claim 1 cinder pneumatic conveying method is characterized in that the nitrogen pressure 〉=0.6MPa that carries among the described step S3-S6.
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| CN104404199A (en) * | 2014-10-20 | 2015-03-11 | 无锡泓成环境科技有限公司 | Converter one-time dry method dedusting evaporating cooling tower crude ash pneumatic conveying method under full-working condition |
| CN104555455A (en) * | 2013-10-20 | 2015-04-29 | 宁夏嘉翔自控技术有限公司 | Electric automatic control system of double-bunker pneumatic conveying system for limestone powder |
| CN107520035A (en) * | 2017-09-27 | 2017-12-29 | 中国电建集团西北勘测设计研究院有限公司 | A kind of device and method of sandstone processing and dedusting |
| CN112029951A (en) * | 2020-08-12 | 2020-12-04 | 北京首钢自动化信息技术有限公司 | Coarse ash conveying control method and device |
| CN112760445A (en) * | 2020-12-24 | 2021-05-07 | 江西理工大学 | Pneumatic conveying system for dry dedusting fine ash of converter gas |
| CN114737014A (en) * | 2022-03-21 | 2022-07-12 | 福建龙净环保股份有限公司 | A kind of converter dust removal ash conveying equipment and conveying method |
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| CN107520035A (en) * | 2017-09-27 | 2017-12-29 | 中国电建集团西北勘测设计研究院有限公司 | A kind of device and method of sandstone processing and dedusting |
| CN107520035B (en) * | 2017-09-27 | 2024-01-23 | 中国电建集团西北勘测设计研究院有限公司 | Sand processing and dust removing device and method |
| CN112029951A (en) * | 2020-08-12 | 2020-12-04 | 北京首钢自动化信息技术有限公司 | Coarse ash conveying control method and device |
| CN112760445A (en) * | 2020-12-24 | 2021-05-07 | 江西理工大学 | Pneumatic conveying system for dry dedusting fine ash of converter gas |
| CN112760445B (en) * | 2020-12-24 | 2022-03-29 | 江西理工大学 | A kind of pneumatic conveying system of converter gas dry dust removal and fine ash |
| CN114737014A (en) * | 2022-03-21 | 2022-07-12 | 福建龙净环保股份有限公司 | A kind of converter dust removal ash conveying equipment and conveying method |
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