CN103261114B - The pneumatic transport equipment of chlorine bypass dust and the cement kiln waste gas processing system possessing this equipment - Google Patents
The pneumatic transport equipment of chlorine bypass dust and the cement kiln waste gas processing system possessing this equipment Download PDFInfo
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- CN103261114B CN103261114B CN201280004081.1A CN201280004081A CN103261114B CN 103261114 B CN103261114 B CN 103261114B CN 201280004081 A CN201280004081 A CN 201280004081A CN 103261114 B CN103261114 B CN 103261114B
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- dust
- air
- pressurized canister
- waste gas
- cement kiln
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- 239000000428 dust Substances 0.000 title claims abstract description 319
- 239000004568 cement Substances 0.000 title claims abstract description 83
- 239000002912 waste gas Substances 0.000 title claims abstract description 75
- 239000000460 chlorine Substances 0.000 title abstract description 50
- 229910052801 chlorine Inorganic materials 0.000 title abstract description 50
- ZAMOUSCENKQFHK-UHFFFAOYSA-N chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 title abstract description 48
- 239000007789 gas Substances 0.000 claims description 26
- 238000005276 aerator Methods 0.000 claims description 16
- 230000001939 inductive effect Effects 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 238000009825 accumulation Methods 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000003247 decreasing Effects 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 238000007792 addition Methods 0.000 description 9
- 230000000903 blocking Effects 0.000 description 8
- 238000009413 insulation Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000001629 suppression Effects 0.000 description 7
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 6
- 239000004615 ingredient Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000001103 potassium chloride Substances 0.000 description 3
- 235000011164 potassium chloride Nutrition 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- 210000003437 Trachea Anatomy 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000002516 radical scavenger Substances 0.000 description 2
- 230000000630 rising Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 101710010421 BN863_22020 Proteins 0.000 description 1
- 101710010411 BN863_22030 Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000009614 chemical analysis method Methods 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 150000001804 chlorine Chemical class 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 201000000522 chronic kidney disease Diseases 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229910052904 quartz Inorganic materials 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Abstract
The present invention provides the conveying equipment of the chlorine bypass dust of a kind of line clogging that can reduce in chlorine bypass dust course of conveying.A kind of pneumatic transport equipment of dust of trapping from cement kiln waste gas, it possesses: the first dust catching tank, its entrance with cement kiln waste gas and outlet, the outlet of dust for the dust arrester and trapping that trap dust from cement kiln waste gas；Pressurized canister, it has the air conveying outlet of the entrance of dust, air intake and dust from the first dust catching tank, and described pressurized canister is for carrying out this dust air conveying by compressed air；Air supply source, it is to the dried compressed air that pressurized canister supply atmospheric pressure dew point is less than 35 DEG C；And the second dust catching tank, it has from pressurized canister by the entrance of the air conveying dust of second pipe, for trapping dust arrester and the air outlet slit of dust.
Description
Technical field
The present invention relates to the pneumatic transport equipment of chlorine bypass dust.Moreover, it relates to possess by the chlorine of the present invention
The cement kiln waste gas processing system of the pneumatic transport equipment of road dust.
Background technology
Containing the volatile ingredient such as alkaline chloride, basic sulfatase in the waste gas of cement kiln equipment.These volatility become
Dividing while circulating between preheater and kiln in cement kiln equipment, gradually concentrating and being dissolved in grog, to cementaceous
Amount has undesirable effect, it addition, also can be attached to the inside wall of preheater etc. as coating, and becomes and makes the interior of preheater etc.
The reason of portion's wall blocking, therefore, the volatile ingredient concentrated area near cement kiln tail has extracted portion (Japan out
Unexamined Patent 9-175847 publication, Japanese Unexamined Patent Publication 11-35355 publication, Japanese Unexamined Patent Publication 2001-335348 publication, Japan
No. 4435273 publications of patent etc.).Volatile ingredient in the waste gas of this extraction is referred to as chlorine bypass because of the material of cooling and solidifying
Dust (chlorine bypass dust).
Chlorine bypass dust together can be processed with clinker etc. by refiner, but, deposit from cement kiln to refiner
In a certain distance, need that chlorine is bypassed dust and be transported to refiner there.As the carrying method of existing chlorine bypass dust, deposit
In following method: take out chlorine bypass dust from basin near cement kiln, it is transported to the basin (Japan near refiner with truck
JP 2000-354838 publication).But, chlorine bypass dust has hygroscopy, accordingly, there exist following problem: if these basins
Wall surface temperature reduce, then deliquescence can cause line clogging, and chlorine bypass dust is difficult to from basin take out.It addition, Japan Patent
No. 3318714 publication is recorded and chlorine has been bypassed dust emission to after outside quality coal in cement kiln systems, sent here by pneumatic transporting defeated
Deliver to the probability of cement refiner, but, the hygroscopy of chlorine bypass dust is high, therefore, can be appreciated that in process of pneumatic transmission
Pipeline can block, and there is no successful case so far.
In order to prevent this blocking, it is proposed that following method: add water in chlorine bypass dust formation slurry, uses cement manufacture
By this slurry and grog, Gypsum Fibrosum with grinding machine and mix at least one in material and be mixed together (Japanese Unexamined Patent Publication 2000-
No. 354838 publications).According to the document, it is described below: by the dress with the coarse powder separation circuit with dust in bypass gas
Put combination application such that it is able to make slurry growing amount be 1% to the maximum relative to cement output, and make this amount less than or equal to pulverizing
Injection flow rate in the grinding machine carried out during grog, does not interferes with cement quality.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 9-175847 publication
Patent documentation 2: Japanese Unexamined Patent Publication 11-35355 publication
Patent documentation 3: Japanese Unexamined Patent Publication 2001-335348 publication
Patent documentation 4: No. 4435273 publications of Japanese Patent No.
Patent documentation 5: Japanese Unexamined Patent Publication 2000-354838 publication
Patent documentation 6: No. 3318714 publications of Japanese Patent No.
But, if the method making chlorine bypass dust pulp described in Japanese Unexamined Patent Publication 2000-354838 publication, then it is assumed that
Can easily cause the burn into blocking of spray nozzle in grinding machine.As a result, it is difficult to control the injection flow rate from nozzle, injection flow rate
Fluctuation easily cause the fluctuation of grinding machine outlet temperature, worry also the fluctuation of cement quality to be brought impact.
Summary of the invention
The present invention makes in view of the foregoing, and its problem is, it is provided that a kind of chlorine bypass dust conveying equipment, its
Need not that chlorine is bypassed dust and be transported to refiner by truck, and can be reduced by chlorine by other method beyond pulp
The line clogging in course of conveying of the road dust.It addition, its problem of the present invention also resides in, it is provided that one possesses this chlorine bypass dust
The cement kiln waste gas processing system of conveying equipment.
The present inventor studies with keen determination in order to solve above-mentioned problem, finds chlorine is not being bypassed dust emission to system
In the case of Wai, be effective by there is the removal moisture drying air of regulation dew point carrying out air conveying, based on this create with
Under invention.
One scheme of the present invention is a kind of pneumatic transport equipment of the dust of trapping from cement kiln waste gas, and it possesses:
First dust catching tank, its entrance with cement kiln waste gas and outlet, for trapping the dust of dust from cement kiln waste gas
The outlet of the dust of device and trapping；Pressurized canister, its have the entrance of dust from the first dust catching tank, air intake,
And the air conveying outlet of dust, described pressurized canister is for coming this dust air conveying, wherein, first by compressed air
The outlet of the dust of dust catching tank is in the top of the entrance of the dust of pressurized canister, and both pass through the first pipeline communication；Air
Supply source, it is to the dried compressed air that pressurized canister supply atmospheric pressure dew point is less than-35 DEG C；And second dust catching
Tank, it has from pressurized canister by the entrance of the air conveying dust of second pipe, for trapping the dust arrester of dust, Yi Jikong
Gas exports.
The cement kiln waste gas flowing into the first dust catching tank in one embodiment, is entered by the pneumatic transport equipment of the present invention
Mouthful waste gas dehumidify in advance and cool down, to make atmospheric pressure dew point be 10～40 DEG C, temperature is 50～150 DEG C.
In another embodiment, air supply source has adsorption-type air-dry machine or without heat to the pneumatic transport equipment of the present invention
Formula air-dry machine.
In yet, the gas temperature in pressurized canister is 0～40 DEG C to the pneumatic transport equipment of the present invention.
The pneumatic transport equipment of the present invention in yet, is also equipped with: pressure switch, in it monitors pressurized canister
Pressure；Level switch, it monitors the Dust Capacity in pressurized canister；And controlling organization, sense pressurized canister when utilizing level switch
When interior Dust Capacity has reached ormal weight, stop supplying dust from the first dust catching tank to pressurized canister, by described dry sky
Pressurized canister is pressurizeed by gas, when having risen to authorized pressure when utilizing pressure switch to sense, starts to the second dust catching tank gas
Power conveying dust, then, when have decreased to authorized pressure when utilizing pressure switch to sense, stops the air conveying of dust, then
Secondary beginning supplies dust from the first dust catching tank to pressurized canister.
The pneumatic transport equipment of the present invention in yet, supplies to pressurized canister from the first dust catching tank from stopping
To dust to start again at from the first dust catching tank to pressurized canister supply dust time be 10 minutes within.
The pneumatic transport equipment of the present invention in yet, in dust going out from the dust of the first dust catching tank
During mouthful by the entrance of the dust of the first pipeline flow-direction pressurized canister, described dry air in the first pipeline with dust not
The flow of the degree that can reflux flows to the first dust catching tank from pressurized canister.
The pneumatic transport equipment of the present invention in yet, the pressure in pressurized canister during air conveying dust
Power is 0.1～0.5MPaG.
The pneumatic transport equipment of the present invention is in yet, air conveying to the second dust catching tank from pressurized canister
During dust, the dust in pressurized canister is in flow regime because flowing into the described dry air of pressurized canister.
In yet, parallel connection is provided with plural pressurized canister to the pneumatic transport equipment of the present invention, and at least one
Individual pressurized canister puts into powder from the first dust catching tank at least one pressurized canister residue pressurized canister in process of pneumatic transmission
Dirt.
The pneumatic transport equipment of the present invention in yet, connect and be provided with primary accumulation by the prime in pressurized canister
Tank, the pressurized canister of rear class puts into dust from the first dust catching tank to primary accumulation tank in process of pneumatic transmission.
Another scheme of the present invention is cement kiln waste gas processing system, possesses cement kiln waste gas air-extractor and as above institute
The pneumatic transport equipment of the present invention stated, wherein, cement kiln waste gas air-extractor possesses: for extraction section cement kiln waste gas
Exhaust tube, for the dust of the outlet connection of supply dehumidifying and the aerator of air of cooling and exhaust tube in exhaust tube
With cyclone separator and the air cooler of the outlet connection of cyclone separator, for supply dehumidifying in air cooler and
The aerator of the air of cooling and induction fan, the outlet of the first dust catching tank links with induction fan, and second
Dust catching tank has the outlet of the dust of trapping, and this outlet connects with cement manufacture grinding machine or clinker tank.
The cement kiln waste gas processing system of the present invention in one embodiment, the air outlet slit of the second dust catching tank and institute
State induction fan to link.
In another embodiment, the gas flow rate making exhaust tube export is the cement kiln waste gas processing system of the present invention
More than 10m/s.
Pneumatic transport equipment according to the present invention and cement kiln waste gas processing system, it is possible to alleviate owing to chlorine bypass dust exists
Deliquescence during keeping and during conveying and make the blocking that dust is attached on container and pipeline and thus causes, it is possible to realize that there is reality
The air conveying of dust is bypassed with the chlorine of property.
Accompanying drawing explanation
Fig. 1 is the cement kiln waste gas processing system of one embodiment of the present invention.
Fig. 2 is to represent that parallel connection is provided with the one of the situation of pressurized canister in the chlorine of the present invention bypasses the pneumatic transport equipment of dust
The schematic diagram of example.
Fig. 3 is to represent to be provided with primary storage in the prime of pressurized canister in the chlorine of the present invention bypasses the pneumatic transport equipment of dust
The schematic diagram of one example of the situation of long-pending tank.
Detailed description of the invention
1. pneumatic transport equipment
With reference to Fig. 1, the pneumatic transport equipment of the chlorine bypass dust of the present invention in one embodiment, possesses: the first dust
Capture tank 100, it has the entrance 101 of cement kiln waste gas and exports 102, for trapping the dust of dust from cement kiln waste gas
The outlet 104 of the dust of device 103 and trapping；Pressurized canister 200, it has entering of the dust from the first dust catching tank 100
Mouth 201, air intake 202 and the air conveying outlet 203 of dust, pressurized canister 200 is for carrying out strength by compressed air
Carrying this dust, wherein, the outlet 104 of the dust of the first dust catching tank 100 is in the entrance 201 of the dust of pressurized canister 200
Top, both are connected by the first pipeline 105；Air supply source 300, it supplies atmospheric pressure dew point to pressurized canister 200 is-35
Dried compressed air below DEG C；And the second dust catching tank 400, it has and passes through second pipe from pressurized canister 200
The entrance 401 of 204 air conveying dust, for trapping dust arrester 402 and the air outlet slit 403 of dust.
Deliquescence refers to when certain solid is exposed in air, absorbs vapor in the atmosphere and is dissolved in and is wherein formed water-soluble
The phenomenon of liquid.The main constituent of the chlorine bypass dust generated by cooling down the waste gas extracted out in cement manufacturing process is generally chlorination
Potassium (below with KCl).Have report claim pure KCl there is no hygroscopy, but, may is that due to chlorine bypass dust in except potassium chloride with
Outer possibly together with CaO, SiO2Deng other composition, and show the highest hygroscopy.Table 1 represents the bar of normal epidemic disaster 100%
Chlorine bypass dust under part and the holding time dependency of the moisture content of portland cement, it is to be understood that the deliquescence of chlorine bypass dust
Property how height.
[table 1]
Table 1. chlorine bypasses the holding time dependency of the moisture content of dust, portland cement
Note 1) damp condition=in order to keep relative humidity 100 [%], about 1 [g] is put in container, as water source to burning
Add water in Bei, keeping sample in airtight space.
Note 2) moisture measuring method " the Computrac MAX-of measuring method=JIS K 0068 chemical products of moisture content
50 " ((strain) I&D).
Cement kiln waste gas flows into the first dust catching tank 100 via entrance 101.Containing by chlorine in the cement kiln waste gas flowed into
Road dust, chlorine bypass dust is trapped by dust arrester 103.As the kind of dust arrester, it is not particularly limited, such as preferably pocket type mistake
Filter, cyclone separator (cyclone) and electric dust arrester.Waste gas after the chlorine that has been captured bypass dust is from exporting 102 rows
Go out.
Cement kiln waste gas usually temperature is about 900～1100 DEG C, atmospheric pressure dew point is more than 55 DEG C typically 60
～the high temperature and humidity gas of about 70 DEG C.If cement kiln waste gas flows into the first dust catching tank under such high temperature and humidity state
100, then can exceed the endurance of dust arrester 103 and become functional defect, or in the first dust catching tank 100, first
It is attached to the chlorine bypass dust generation deliquescence of moisture in pipeline 105 and easily produces blocking.On the other hand, if in order to strongly real
Execute dehumidifying and be intended to cool down cement kiln waste gas by dehumidified air, then equipment cost can sharp rise, and is unpractical.
It is therefore preferable that dehumidify the cement kiln waste gas flowing into entrance 101 in advance, making atmospheric pressure dew point is 10～40
DEG C, more preferably carrying out dehumidifying and making atmospheric pressure dew point is 20～30 DEG C.Additionally, it is preferred that to the cement kiln waste gas flowing into entrance 101
Cooling down in advance, making temperature is 50～150 DEG C, cools down the most in advance, and making temperature is 60～100 DEG C.It addition, conduct
Relative humidity, preferably less than 100%, more preferably less than 50%, more preferably less than 20%.As long as in this scope
In, it becomes possible to utilize extraneous air as cooling air, from the durability of dust arrester 103 and suppression the first dust catching tank
From the viewpoint of deliquescence in 100 and in the first pipeline 105, also there is practicality.EGT after being cooled down by reduction, from
And improve the durability of bag filter, bag filter also is able to the cheap products using heat resisting temperature low.In order to maintain
Desired temperature, prevents dust deliquescence, can be by covering the surrounding of the first dust catching tank 100 with insulation material or in week
Enclose arbitrary known approaches such as arranging heater be incubated or heat.
Induction fan 108 can be led to by such as exhaustor 106 from the waste gas of cement kiln waste gas outlet 102 discharge.
After induction fan 108 is gone out, it is possible to after drying machine, regulator, electrostatic (electric dust) precipitator etc., discharge from chimney.
As induction fan 108, use the kiln IDF of induction major part cement kiln waste gas, be convenient and economical.Enforcement at Fig. 1
Mode also using kiln IDF.The preferably upstream at induction fan 108 arranges bag filter scavenger fan 107, for
Reclaim the dust not trapped completely by dust arrester 103, the present embodiment of Fig. 1 is also equipped with bag filter aerofluxus wind
Fan.
On the other hand, in the first dust catching tank 100, the dust of trapping passes through first pipeline 105 flow direction from outlet 104
The pressurized canister 200 of side.As it is shown in figure 1, preferably outlet 104 is to extract the first interior recovery of dust catching tank 100 by gravity
The mode of dust is arranged at the bottom of the first dust catching tank 100, it addition, easily take out dust from the first dust catching tank 100
From the viewpoint of, preferably in the taper gradually narrowed to bottom or cone formed.It addition, by by the first dust catching tank
The outlet 104 of the dust of 100 is configured at the top of the entrance 201 of the dust of pressurized canister 200, thus from the powder of outlet 104 discharge
Dirt can utilize gravity to pass through the first pipeline 105 and naturally drop in pressurized canister 200.Preferably connect entrance 201 and the powder of dust
First pipeline 105 of the outlet 104 of dirt vertically extends, but as long as being dust meeting smooth delivery of power, being slightly tilted and also may be used
With.
Although being provided without in the embodiment of figure 1 but it also may be from the dust of the first dust catching tank 100 at dust
Outlet 104 dust that flows to pressurized canister 200 by the first pipeline 105 entrance 201 during, will be described later is dry
The flow of the degree that dry air will not reflux with dust in the first pipeline 105 from pressurized canister 200 to the first dust catching tank 100
Flowing.Thereby, it is possible to suppression is at the dust deliquescence of the first pipeline 105.From the viewpoint of preventing dust deliquescence, it is also possible to
One pipeline 105 is incubated or heats.Can be provided for controlling the valve of dust flowing on the first pipeline 105.For example, it is possible to
Dust is set near the outlet 104 of dust or its and puts into main valve 501, powder can be set near the entrance 201 of dust or its
Dirt puts into valve 502.
Pressurized canister 200 houses the dust from the first dust catching tank 100.If being stored with the dust of ormal weight, then in envelope
Close and after being pressurized to the air conveying required pressure of dust, open be arranged at dust air conveying export 203 conveying
Valve 504, by air conveying for dust to the second dust catching tank 400.During conveying, compressed air is passed through second from air intake 202
Pipeline 204 imports in the second dust catching tank 400.
This compressed air is supplied to pressurized canister 200 from air supply source 300 by air line 303.Air supply source 300
It typically is provided with utilizing the air compressor 301 of extraneous air, but be not restricted to that this.Can be in air supply source 300 and pressurization
It is provided for controlling the air supply valve 503 of compressed air supply on air line 303 between tank 200.From preventing dust tide
From the viewpoint of solution, it should use the air that dew point is extremely low, specifically, atmospheric pressure dew point is preferably used and is less than-35 DEG C
Dry air.Thus, though the gas temperature in pressurized canister 200 be carry out the most especially heating room temperature (such as 0～40 DEG C,
Typically 10～30 DEG C), it is also possible to the deliquescence of dust is suppressed can be practical degree.Compressed-air actuated atmospheric pressure dew point
More preferably less than-40 DEG C, more preferably less than-50 DEG C, most preferably less than-60 DEG C, for example can make air
Pressure dew point is-80 DEG C～-35 DEG C.Such dry air can possess such as adsorption-type air-dry machine or without hot type wind by use
The air supply source 300 of the air-dry machines such as dry machine 302 obtains.
As compressed-air actuated pressure condition, if discharge pressure is too low, then dust can not be transported to destination, the opposing party
Face, if discharge pressure is too high, then relative humidity rises, and easily causes the deliquescence of dust, it is therefore preferable that regulate air conveying dust
During pressurized canister 200 in pressure be 0.1～0.5MPaG.
From pressurized canister 200 to during the second air conveying dust of dust catching tank 400, preferably in pressurized canister 200
Dust be in flow regime because flowing into the above-mentioned dry air of pressurized canister 200.Thereby, it is possible in suppression pressurized canister 200
Dust anchors on the inwall of pressurized canister 200, it is also possible to reduce air conveying after remain in the dust in pressurized canister 200.To this end,
Such as, as it is shown in figure 1, air intake 202 can be arranged in the bottom of pressurized canister 200.Utilize the compression imported in pressurized canister 200
Air and the dust flowing that houses in making pressurized canister 200.
By covering the surrounding of pressurized canister 200 with insulation material or the arbitrary public affairs such as heater can also be set around
Know that means are incubated or heat.Although it addition, be provided without in the embodiment of figure 1, but, by air supply source 300
Possess heater, thus also be able to the compressed air that supplying temperature is higher.Thereby, it is possible to reduce pressurized canister 200 and second pipe
The relative humidity of the gas in 204, therefore, contributes to preventing dust deliquescence.
By dust from entrance 401 by air conveying importing the second dust catching tank 400.Second dust catching tank 400 has
There are the dust arrester 402 for trapping dust and air outlet slit 403.As the kind of dust arrester, it is not particularly limited, the most preferably
Bag filter.Be captured the air after dust from outlet 403 discharge.Can directly discharge from the air of outlet 403 discharge
In air, it is also possible to special gas extraction system is additionally set and discharges.It addition, as it is shown in figure 1, can be by exhaustor 404 and outlet
After 403 link, it is converged with the exhaustor 106 of the first dust catching tank 100.Thus, gas extraction system is caught, therefore
Very economical.
Owing to being admitted to above-mentioned dry air in the second dust catching tank 400, so in the second dust catching tank 400
Bringing into almost without moisture.Therefore, it is possible to while suppression deliquescence, the long-term chlorine that preserves bypasses dust.For instance, it is possible to preserve
More than one week, preferably can also preserve more than one month.After terminating during preserving, it is possible to smooth from the second dust catching tank 400
Dust is discharged on ground.The dust discharged can be via cement manufacture grinding machine (refiner) near the valve inputs such as revolving valve or cement
In grog tank (cement clinker tank).
The pneumatic transport equipment of the chlorine bypass dust of the present invention can have the pressure of the pressure in supervision pressurized canister 200 and open
The level switch (1evel switch) 602 of the Dust Capacity in pass 601 and supervision pressurized canister 200, can possess and control gas accordingly
The controlling organization of power conveying.Such as, controlling organization can make pneumatic transport equipment sequential operation as following.If by thing
The Dust Capacity that bit switch 602 senses in pressurized canister 200 has reached ormal weight, then stop from the first dust catching tank 100 to adding
Pressure tank 200 supplies dust, is pressurizeed pressurized canister 200 by dry air, has risen to regulation if being sensed by pressure switch 601
Pressure, then start, to the second air conveying dust of dust catching tank 400, then, to have decreased to if being sensed by pressure switch 601
Authorized pressure, then stop the air conveying of dust, starts again at and supplies dust from the first dust catching tank 100 to pressurized canister 200.
The sequence of operation of the more detailed pneumatic transport equipment in the embodiment of explanatory diagram 1.When from put into main valve 501,
When the state that input valve 502, air supply valve 503 and transfer valve 504 are closed starts, first, by opening input valve 502 successively
And put into main valve 501, thus start to put in pressurized canister 200 dust in first dust catching tank 100.If by level switch
602 Dust Capacities sensed in pressurized canister 200 have reached ormal weight, then by closing input main valve 501 successively and putting into valve
502, thus stop supplying dust from the first dust catching tank 100 to pressurized canister 200.Then, open air supply valve 503, logical
Cross dry air to pressurization in pressurized canister 200.If being sensed by pressure switch 601 and having risen to authorized pressure, then open conveying
Valve 504, starts to the second air conveying dust of dust catching tank 400.If without the dust that should carry, then in pressurized canister 200
Pressure drastically reduce.Therefore, have decreased to authorized pressure if being sensed by pressure switch 601, then by closing air successively
Supply valve and transfer valve, thus stop the air conveying of dust.Then, by opening input valve 502 successively and putting into main valve
501, thus start again at and the dust in the first dust catching tank 100 is put in pressurized canister 200, repeat above-mentioned moving
Make.
From pressurized canister 200 to during the second air conveying dust of dust catching tank 400, stopped from the first dust catching tank
100 supply dust to pressurized canister 200, therefore, can accumulate and have dust in the first dust catching tank 100.But, the first dust catching
Being the state that humidity is higher in tank 100, therefore, from the viewpoint of suppression dust deliquescence, preferably dust is not trapped in for a long time
In first dust catching tank 100.It is therefore preferable that supply dust to again from the first dust catching tank 100 to pressurized canister 200 from stopping
The time that secondary beginning supplies dust from the first dust catching tank 100 to pressurized canister 200 is short, for example, it is preferable within being 10 minutes, more
Within being preferably 5 minutes.But, if this time is the shortest, then the switching frequency of valve becomes big, and the life-span of valve is brought harmful effect,
It is therefore preferable that be more than 1 minute, typically 2～4 minutes.
As other method, as in figure 2 it is shown, two pressurized canister 200 can be arranged in parallel, a pressurized canister is air conveying
During in another pressurized canister put into dust.Plural pressurized canister 200 can also be arranged in parallel as required.At this
In the case of Zhong, a certain pressurized canister puts into dust from the first dust catching tank in process of pneumatic transmission to remaining pressurized canister.
Or, as it is shown on figure 3, the prime in pressurized canister is arranged in series primary accumulation tank 205, the pressurized canister 200 of rear class is air conveying
During put into dust to the primary accumulation tank 205 of prime, at the end of air conveying, can throw to pressurized canister from primary accumulation tank
Enter dust.So can discharge dust continuously from the first dust catching tank 100.Can also send to primary accumulation tank 205
The dry air identical with the air being sent to pressurized canister 200, remains drying regime by inside.
<2. cement kiln waste gas processing system>
The pneumatic transport equipment of the chlorine bypass dust of the present invention of described above can be with cement kiln waste gas air-extractor group
Incompatible composition cement kiln waste gas processing system.Thereby, it is possible to continued to useless from extracted out by cement kiln by tubing
Gas reclaims chlorine bypass dust the series of processes it processed with refiner.Cement kiln waste gas according to the present invention processes system
System, it is not necessary to chlorine is bypassed dust and is transported to refiner by truck, it is possible to reduce chlorine bypass dust pipe in course of conveying
The corrosion of spray nozzle and blocking in road blocking and refiner, it is possible to realize the pneumatic transporting with the chlorine bypass dust of practicality
Send.
With reference to Fig. 1, the cement kiln waste gas processing system of the present invention in one embodiment, possesses cement kiln waste gas and bleeds and set
The pneumatic transport equipment of the chlorine bypass dust of the standby and above-mentioned present invention, cement kiln waste gas air-extractor possesses: for extraction unit
Divide the exhaust tube 702 of cement kiln waste gas, for supplying dehumidifying and the aerator 703 of tempering air in exhaust tube 702 and taking out
The dust of the outlet connection of trachea 702 cyclone separator 704 and the air cooler of the outlet connection of cyclone separator 704
705, in air cooler 705, dehumidifying and the aerator 706 of tempering air and induction fan 108, the first powder are supplied
The entrance 101 of dirt capture tank 100 is connected by exhaustor 710 with air cooler 705, the outlet of the first dust catching tank 100
102 are connected by exhaustor 106 with induction fan 108, and the second dust catching tank 400 has the outlet 405 of the dust of trapping,
This outlet connects with cement manufacture grinding machine or clinker tank.
Exhaust tube 702 extracts the portion containing volatile ingredient discharged from rotary kiln out.Waste gas is as described above
High temperature and humidity gas.Exhaust tube 702 is general in addition to the kiln tail 701 being arranged at kiln, be also provided at from the kiln tail 701 of kiln to
In the way rising airduct or roaster that surface extends.In FIG, bleed from rising airduct.Aerator 703 passes through wind
Pipe is linked to exhaust tube 702, dehumidifies and the air that cools down is pressed in the way of thus flowing to the direction of cyclone separator 704 and takes out
Trachea 702.Waste gas, while mixing with the waste gas extracted out, is cooled down and dehumidifies by the air imported.As it has been described above, at this
The air used is extraneous air, for the purpose of ensuring that the reason of rate of cooling, the preferably gas flow rate of the outlet of exhaust tube 702
For more than 10m/s, such as, can be 10～30m/s.
By exhaustor 709, the mixed gas of the waste gas gone out from exhaust tube 702 and cooling air is imported dust revolve
Wind separator 704, separating coarse-grained.Then, mixed gas in air cooler 705 with the cooling being pressed into by aerator 706
It is further cooled by after air mixing.Then, mixed gas imports the first dust catching tank 100, from waste gas by exhaustor 710
The middle dust that bypassed by chlorine is recovered in the first dust catching tank 100.The dehumidifying that supplies from aerator 703 and aerator 706 and cold
As long as the amount of air but is adjusted to make the temperature of the cement kiln waste gas in inflow the first dust catching tank 100 and humidity upper
In the range of stating.The pneumatic transport equipment of the chlorine bypass dust after chlorine bypass dust is imported in first dust catching tank 100
Action described above.
Embodiment
Below, utilize embodiment that the present invention is described, but the invention is not restricted to these embodiments.
(embodiment 1)
The cement kiln waste gas processing system in the embodiment of Fig. 1 is made to start a week under following operating condition.
<operating condition>
(1) cement kiln waste gas of exhaust tube 702 entrance:
-temperature: 900～1100 DEG C,
-atmospheric pressure dew point: 60～69 DEG C
-air quantity: 150 [m3N/min]
(2) cool down and dehumidifying air:
-extraneous air (temperature: 2～16 DEG C, atmospheric pressure dew point :-5～11 DEG C)
The air air quantity that-aerator is sent into exhaust tube 702: 250 [m3N/min]
The air air quantity that-aerator is sent into cooler 705: 320 [m3N/min]
(3) gas flow rate of exhaust tube 702 outlet: 15m/s
(4) cement kiln waste gas of inflow entrance 101:
-gas temperature: 58～82 DEG C
-atmospheric pressure dew point: 30～39 DEG C
The dust arrester 103 of (5) first dust catching tanks 100: bag filter
(6) first dust catching tanks 100 are with or without insulation: have (insulation material+electric heater)
(7) first pipelines 105 are with or without insulation: have (insulation material)
(8) gas temperature in pressurized canister 200: 12～38 DEG C
(9) pressure in the pressurized canister in process of pneumatic transmission: 0.15MPaG
(10) conveying air supply source:
Air compressor
Adsorption-type air-dry machine (CKD company SHD3045)
(11) atmospheric pressure dew point of conveying air :-40～-56 DEG C
(12) pressurized canister 200 is with or without insulation: have (insulation material)
The dust arrester 402 of (13) second dust catching tanks 400: bag filter
(14) dust is supplied to start again at from first dust from the first dust catching tank 100 to pressurized canister 200 from stopping
Capture tank 100 supplies the time of dust to pressurized canister 200: about 2 minutes
(15) high (PIS H) setting value: 0.15MPaG of pressure switch
(16) pressure switch low (PIS L) setting value: 0.06MPaG
(17) high (LS H) setting value: 0.1m of level switch3
(18) air conveying distance: 150m
The dew point of the cement kiln waste gas of exhaust tube 702 entrance and the cement kiln waste gas of inflow entrance 101 is according to JIS
Z8808-1995, uses moisture absorption pipe to measure the water content in waste gas and calculate.
The dew point of cooling and the dew point of dehumidifying air and conveying air is entered by electrostatic capacitive Temperature Humidity Sensor
Row is measured.
It addition, sample the portion in exhaust tube 702, the chlorine bypass dust obtaining cooling carries out chemistry point
Analysis, result is as shown in table 2.
[table 2]
Note 1) measuring method=JIS R 5202 " chemical analysis method of cement " of chemical analysis value, Ig-loss is
Burning decrement at 1000 DEG C.
Note 2) sample just after chlorine bypass sampler extraction, gathering, air-dry with plastic bag, it is suppressed that moisture is inhaled
Wet, mobile.
The result that under above-mentioned operating condition, cement kiln waste gas processing system is started is, the first pipeline 105, pressurized canister 200 and
Dust attachment all it is hardly visible on second pipe 204.
(embodiment 2)
In addition to changing operating condition as follows, make the cement kiln in the embodiment of Fig. 1 similarly to Example 1
Exhaust treatment system starts a week.
<operating condition>
(1) cool down and dehumidifying air:
-extraneous air (temperature: 2～16 DEG C, atmospheric pressure dew point :-5～11 DEG C)
The air air quantity that-aerator is sent into exhaust tube 702: 100 [m3N/min]
The air air quantity that-aerator is sent into cooler 705: 100 [m3N/min]
(2) gas flow rate of exhaust tube 702 outlet: 6m/s
(3) cement kiln waste gas of inflow entrance 101:
-gas temperature: 230～270 DEG C
-atmospheric pressure dew point: 43～52 DEG C
(4) gas temperature in pressurized canister 200: 65～98 DEG C
The result that under above-mentioned operating condition, cement kiln waste gas processing system is started is, the first pipeline 105, pressurized canister 200 and
Dust attachment all it is hardly visible on second pipe 204.But, flow into the temperature mistake of the cement kiln waste gas of the first dust catching tank
Height, it is therefore contemplated that the life-span of bag filter can be affected.Specifically, high temperature can affect the filter cloth resin of bag filter
Aging life-span, it is impossible to carry out starting continuously of half a year.
(comparative example 1)
In addition to unused air-dry machine is dried compressed air, make under the same conditions as example 1 at cement kiln waste gas
Reason system operates a week.The atmospheric pressure dew point of conveying air is-5～5 DEG C.As a result of which it is, in the first pipeline 105, pressurization
The dust all having the amount more than embodiment 1 on tank 200 and second pipe 204 adheres to, grows, and causes blocking in pipe, on test way
In can not start continuously.
Description of reference numerals
100 first dust catching tanks
101 cement kiln waste gas entrances
102 cement kiln waste gas outlets
103 dust arresters
The outlet of 104 dust
105 first pipelines
106 exhaustors
107 bag filter scavenger fans
108 induction fans
200 defeat tank
201 from the entrance of the dust of the first dust catching tank
202 air intakes
The air conveying outlet of 203 dust
204 second pipes
205 primary accumulation tanks
300 air supply sources
301 air compressors
302 air-dry machines
303 air lines
400 second dust catching tanks
The entrance of 401 air conveying dust
402 dust arresters
403 air outlet slits
404 exhaustors
The outlet of 405 dust
501 put into main valve
502 put into valve
503 air supply valves
504 transfer valves
601 pressure switches
602 level switches
The kiln tail of 701 kilns
702 exhaust tubes
703 aerators
704 dust cyclone separator
705 air coolers
706 aerators
709 exhaustors
710 exhaustors.
Claims (14)
1. the pneumatic transport equipment of dust for trapping from cement kiln waste gas, it possesses:
First dust catching tank, its entrance with cement kiln waste gas and outlet, for trapping dust from cement kiln waste gas
The outlet of the dust of dust arrester and trapping；
Pressurized canister, it has the air conveying use of the entrance of dust, air intake and dust from the first dust catching tank
Outlet, described pressurized canister is for coming this dust air conveying, wherein, going out of the dust of the first dust catching tank by compressed air
Mouth is in the top of the entrance of the dust of pressurized canister, and both pass through the first pipeline communication；
Air supply source, it is to the dried compressed air that pressurized canister supply atmospheric pressure dew point is less than-35 DEG C；And
Second dust catching tank, it has from pressurized canister by the entrance of the air conveying dust of second pipe, for trapping powder
The dust arrester of dirt and air outlet slit.
2. pneumatic transport equipment as claimed in claim 1, wherein,
The waste gas of the cement kiln waste gas entrance flowing into the first dust catching tank is dehumidified in advance and cools down, makes atmospheric pressure dew point
Be 10～40 DEG C, temperature be 50～150 DEG C.
3. pneumatic transport equipment as claimed in claim 1 or 2, wherein,
Air supply source has adsorption-type air-dry machine or without hot type air-dry machine.
4. pneumatic transport equipment as claimed in claim 1 or 2, wherein,
Gas temperature in pressurized canister is 0～40 DEG C.
5. pneumatic transport equipment as claimed in claim 1 or 2, wherein, is also equipped with:
Pressure switch, it monitors the pressure in pressurized canister；
Level switch, it monitors the Dust Capacity in pressurized canister；And
Controlling organization, when the Dust Capacity utilizing level switch to sense in pressurized canister has reached ormal weight, stops from the first powder
Dirt capture tank supplies dust to pressurized canister, is pressurizeed pressurized canister by described dried compressed air, when utilizing pressure switch
Sense when having risen to authorized pressure, start to the second air conveying dust of dust catching tank, then, when utilizing pressure switch
Sense when have decreased to authorized pressure, stop the air conveying of dust, start again at from the first dust catching tank to pressurized canister
Supply dust.
6. pneumatic transport equipment as claimed in claim 5, wherein,
From stopping from the first dust catching tank to pressurized canister supply dust to starting again at from the first dust catching tank to pressurized canister
Within the time of supply dust is 10 minutes.
7. pneumatic transport equipment as claimed in claim 1 or 2, wherein,
At dust from the outlet of the dust of the first dust catching tank mistake by the entrance of the dust of the first pipeline flow-direction pressurized canister
Cheng Zhong, the flow of the degree that described dried compressed air will not reflux with dust in the first pipeline from pressurized canister to first
Dust catching tank flows.
8. pneumatic transport equipment as claimed in claim 1 or 2, wherein,
The pressure in pressurized canister during air conveying dust is 0.1～0.5MPaG.
9. pneumatic transport equipment as claimed in claim 1 or 2, wherein,
From pressurized canister to during the second air conveying dust of dust catching tank, the dust in pressurized canister is because flowing into pressurized canister
Described dried compressed air and be in flow regime.
10. pneumatic transport equipment as claimed in claim 1 or 2, wherein,
Parallel connection is provided with plural pressurized canister, at least one pressurized canister in process of pneumatic transmission from the first dust catching tank to
At least one pressurized canister in residue pressurized canister puts into dust.
11. pneumatic transport equipments as claimed in claim 1 or 2, wherein,
Prime in pressurized canister is connected and is provided with primary accumulation tank, and the pressurized canister of rear class is caught from the first dust in process of pneumatic transmission
Collection tank puts into dust to primary accumulation tank.
12. 1 kinds of cement kiln waste gas processing systems, possess institute any one of cement kiln waste gas air-extractor and claim 1～11
The pneumatic transport equipment stated, wherein,
Cement kiln waste gas air-extractor possesses: for the exhaust tube of extraction section cement kiln waste gas, for supplying in exhaust tube
The aerator of the air of dehumidifying and cooling and dust cyclone separator and the cyclone separator of the outlet connection of exhaust tube
Outlet connection air cooler, in air cooler supply dehumidifying and cooling air aerator and
Induction fan,
The outlet of the cement kiln waste gas of the first dust catching tank links with induction fan,
Second dust catching tank has the outlet of the dust of trapping, and this outlet connects with cement manufacture grinding machine or clinker tank
Logical.
13. cement kiln waste gas processing systems as claimed in claim 12, wherein,
The air outlet slit of the second dust catching tank links with described induction fan.
The 14. cement kiln waste gas processing systems as described in claim 12 or 13, wherein,
The gas flow rate making exhaust tube export is more than 10m/s.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-036232 | 2011-02-22 | ||
| JP2011036232A JP4746158B1 (en) | 2011-02-22 | 2011-02-22 | Chlorine bypass dust pneumatic transportation equipment and cement kiln exhaust gas treatment system equipped with the equipment |
| PCT/JP2012/053866 WO2012115014A1 (en) | 2011-02-22 | 2012-02-17 | Pneumatic transport facility for chlorine bypass dust, and cement kiln exhaust gas treatment system equipped with the facility |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103261114A CN103261114A (en) | 2013-08-21 |
| CN103261114B true CN103261114B (en) | 2016-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116929081A (en) * | 2023-09-18 | 2023-10-24 | 赣州有色冶金机械有限公司 | Dust collection and discharging device and rotary reduction furnace with same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101600666A (en) * | 2007-12-19 | 2009-12-09 | 三菱综合材料株式会社 | The exhaust gas treatment method of cement burning plant and treatment system |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101600666A (en) * | 2007-12-19 | 2009-12-09 | 三菱综合材料株式会社 | The exhaust gas treatment method of cement burning plant and treatment system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116929081A (en) * | 2023-09-18 | 2023-10-24 | 赣州有色冶金机械有限公司 | Dust collection and discharging device and rotary reduction furnace with same |
| CN116929081B (en) * | 2023-09-18 | 2023-12-01 | 赣州有色冶金机械有限公司 | Dust collection and discharging device and rotary reduction furnace with same |
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