CN204522750U - A kind of denitrification apparatus of rotary kiln - Google Patents
A kind of denitrification apparatus of rotary kiln Download PDFInfo
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- CN204522750U CN204522750U CN201520153451.9U CN201520153451U CN204522750U CN 204522750 U CN204522750 U CN 204522750U CN 201520153451 U CN201520153451 U CN 201520153451U CN 204522750 U CN204522750 U CN 204522750U
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Abstract
The utility model relates to a kind of denitrification apparatus of rotary kiln, belongs to off-gas cleaning equipment field, to improve the denitration effect of denitrification apparatus.A kind of denitrification apparatus of rotary kiln, comprise suspended preheater and reactor, described suspended preheater comprises multiple cyclone cylinder, flue is connected with between adjacent described cyclone cylinder, described reactor is provided with air inlet and gas outlet, is connected with hot precipitator between the air inlet of described reactor and described flue.
Description
Technical field
The utility model relates to a kind of denitrification apparatus of rotary kiln, belongs to off-gas cleaning equipment field.
Background technology
The Solnhofen cement plant of Germany, Italian Monselice cement plant and Italian Calavino cement plant are provided with denitrification apparatus on rotary kiln, and described denitrification apparatus all adopts high dirt to arrange.
With reference to Fig. 1, concrete, denitrification apparatus comprises suspended preheater 20 and reactor 30, and suspended preheater 2 comprises the first cyclone cylinder 201, second cyclone cylinder 202, the 3rd cyclone cylinder 203, the 4th cyclone cylinder 204 and the 5th cyclone cylinder 205 that connect successively.Flue gas in rotary kiln 10 after the 5th cyclone cylinder 205, the 4th cyclone cylinder 204, the 3rd cyclone cylinder 203, second cyclone cylinder 202 and the first cyclone cylinder 201, is entered in reactor 40 by air inlet pipe 30 successively.
With reference to Fig. 1, the temperature that reactor 40 inner catalyst normally runs is 320 DEG C-420 DEG C, best denitrating flue gas temperature is 370 DEG C-380 DEG C, but, flue-gas temperature after tested in the first cyclone cylinder 201 is 250 DEG C-350 DEG C, the flue gas of 250 DEG C-350 DEG C is after the further cooling of air inlet pipe 30, and the flue gas entered in reactor 40 will reduce the activity of catalyst, thus causes denitrification apparatus denitration effect poor.
With reference to Fig. 1, in the flue gas in the first cyclone cylinder 201, high (content of dust is 50g/m to dust content
3-80g/m
3), a large amount of dust enters in reactor 40.6 layers of flow straightening grid 401 are provided with in reactor 40, flue gas enters in the catalyst micropore canals of reactor 40 by flow straightening grid 401 uniformly, there is a large amount of dust in flue gas not only can the micropore through hole of blocking catalyst, and, dust comprises alkali metal and heavy metal, also accelerates the speed of catalyst failure.
Summary of the invention
Problem to be solved in the utility model is just to provide a kind of denitrification apparatus of rotary kiln, to improve the denitration effect of denitrification apparatus.
For solving the problem, the utility model adopts following technical scheme: a kind of denitrification apparatus of rotary kiln, comprise suspended preheater and reactor, described suspended preheater comprises multiple cyclone cylinder, flue is connected with between adjacent described cyclone cylinder, described reactor is provided with air inlet and gas outlet, is connected with hot precipitator between the air inlet of described reactor and described flue.
Further, described multiple cyclone cylinder comprises the first cyclone cylinder, second cyclone cylinder, 3rd cyclone cylinder, 4th cyclone cylinder and the 5th cyclone cylinder, the first flue is connected with between described first cyclone cylinder and described second cyclone cylinder, the second flue is connected with between described second cyclone cylinder and described 3rd cyclone cylinder, described hot precipitator is connected between the air inlet of reactor and the second flue, the 3rd flue is connected with between described 3rd cyclone cylinder and described 4th cyclone cylinder, the 4th flue is connected with between described 4th cyclone cylinder and described 5th cyclone cylinder, the 5th flue is connected with between described 5th cyclone cylinder and described rotary kiln.
Further, the gas outlet of described reactor is connected with described second flue, and the pipeline of described second fume pipe between air inlet and gas outlet is provided with flue valve.
Further, described suspended preheater comprises the first cyclone cylinder, second cyclone cylinder, 3rd cyclone cylinder, 4th cyclone cylinder and the 5th cyclone cylinder, the first flue is connected with between described first cyclone cylinder and described second cyclone cylinder, described hot precipitator is connected between the air inlet of reactor and the first flue, the second flue is connected with between described second cyclone cylinder and described 3rd cyclone cylinder, the 3rd flue is connected with between described 3rd cyclone cylinder and described 4th cyclone cylinder, the 4th flue is connected with between described 4th cyclone cylinder and described 5th cyclone cylinder, the 5th flue is connected with between described 5th cyclone cylinder and described rotary kiln.
Further, the gas outlet of described reactor is connected with described first flue, and the pipeline of described first fume pipe between air inlet and gas outlet is provided with flue valve.
Further, described hot precipitator lower end is provided with the cleaning shaft for connecting flue, and described cleaning shaft is provided with cleaning shaft valve.
Further, be connected with air inlet pipe between the air inlet of described reactor and flue, described hot precipitator is arranged in air inlet pipe, and the pipeline of described air inlet pipe between hot precipitator and flue is provided with the first switch valve.
Further, be connected with escape pipe between the gas outlet of described reactor and flue, described escape pipe is provided with second switch valve.
Further, described escape pipe is provided with charge pipe.
Further, described first cyclone cylinder is provided with offgas duct.
The beneficial effects of the utility model:
In the utility model, hot precipitator is provided with between the air inlet of reactor and flue, hot precipitator is not only for raising the temperature of air inlet inner tube smoke, to avoid the catalysqt deactivation in reactor, and, hot precipitator can also reduce the content of dust in flue gas, to avoid the micro channel of dust blocking catalyst.
Accompanying drawing explanation
Fig. 1 is the structural representation of denitrification apparatus in prior art;
Fig. 2 is the first structural representation of the denitrification apparatus of rotary kiln in the utility model;
Fig. 3 is the structural representation of suspended preheater in Fig. 2;
Fig. 4 is the second structural representation of the denitrification apparatus of rotary kiln in the utility model.
Detailed description of the invention
The technical scheme of accompanying drawing to the embodiment of the present invention below in conjunction with the embodiment of the present invention is explained and illustrated, but following embodiment is only the preferred embodiments of the present invention, and not all.Based on the embodiment in embodiment, those skilled in the art under the prerequisite not making creative work obtain other embodiments, all belong to protection scope of the present invention.
Embodiment one
With reference to Fig. 2 and Fig. 3, a kind of denitrification apparatus of rotary kiln, comprise suspended preheater 2 and reactor 3, suspended preheater 2 comprises the first cyclone cylinder 21 setting up and down successively, second cyclone cylinder 22, 3rd cyclone cylinder 23, 4th cyclone cylinder 24 and the 5th cyclone cylinder 25, the first flue 61 is connected with between first cyclone cylinder 21 and the second cyclone cylinder 22, the tube wall of the first flue 61 is provided with the first charge pipe 611, the second flue 62 is connected with between second cyclone cylinder 22 and the 3rd cyclone cylinder 23, the first removing ash pipeline 71 is connected with between second flue 62 and the first cyclone cylinder 21 lower end, first removing ash pipeline 71 is provided with the first removing ash pipeline valve 711, the 3rd flue 63 is connected with between 3rd cyclone cylinder 23 and the 4th cyclone cylinder 24, the second removing ash pipeline 72 is connected with between 3rd flue 63 and the second cyclone cylinder 22 lower end, second removing ash pipeline 72 is provided with the second removing ash pipeline valve 721, the 4th flue 64 is connected with between 4th cyclone cylinder 24 and the 5th cyclone cylinder 25, the 3rd removing ash pipeline 73 is connected with between 4th flue 64 and the 3rd cyclone cylinder 23 lower end, 3rd removing ash pipeline 73 is provided with the 3rd removing ash pipeline valve 731, the 5th flue 65 is connected with between 5th cyclone cylinder 25 and rotary kiln 1, the 4th removing ash pipeline 74 is connected with between 5th flue 65 and the 4th cyclone cylinder 22 lower end, 4th removing ash pipeline 74 is provided with the 4th removing ash pipeline valve 741, wherein, in the present embodiment, rotary kiln 1 is cement kiln.
With reference to Fig. 2, in the present embodiment, air inlet pipe 32 is connected with between the air inlet of reactor 3 and the second flue 62, air inlet pipe 32 is provided with hot precipitator 4, escape pipe 33 is connected with between the gas outlet of reactor 3 and the second flue 62, the tube wall of the second flue 62 between air inlet pipe 32 and escape pipe 33 is provided with flue valve 5, flue valve 5, for being communicated with or disconnecting the second flue 62, is disposed in the second cyclone cylinder 22 after reactor 3 denitration with the flue gas realized in the second flue 62.In rotary kiln 1 course of work, flue valve 5 cuts out, in rotary kiln 1, the emission path of flue gas is: the 5th flue 65, 5th cyclone cylinder 25, 4th flue 64, 4th cyclone cylinder 24, 3rd flue 63, 3rd cyclone cylinder 23, the pipeline that second flue 62 is communicated with air inlet pipe 32, air inlet pipe 32, reactor 3, escape pipe 33, the pipeline that second flue 62 is communicated with escape pipe 33, second cyclone cylinder 22, first flue 61 and the first cyclone cylinder 21, first cyclone cylinder 21 upper end is provided with offgas duct 211, flue gas in first cyclone cylinder 21 is disposed in air by offgas duct 211.
With reference to Fig. 2, from rotary kiln 1, the emission path of flue gas is known, in the present embodiment, flue gas in 3rd cyclone cylinder 23 needs just can enter in reactor 3 through hot precipitator 4, flue gas is after hot precipitator 4 heats, and temperature can rise to 370 DEG C-380 DEG C, to avoid catalysqt deactivation; Flue gas is after hot precipitator 4 dedusting, and in reactor 3, the quantity of flow straightening grid 31 can be reduced to 3 layers or 4 layers from existing 6 layers, to realize the use cost reducing reactor 3 inner catalyst.
With reference to Fig. 2, in this enforcement, the lower end of hot precipitator 4 is provided with the cleaning shaft 41 for being communicated with the 4th flue 64, dust in hot precipitator 4 is discharged by cleaning shaft 41, cleaning shaft 41 is provided with cleaning shaft valve 411, cleaning shaft valve 411 is for being communicated with or disconnecting cleaning shaft 41.
With reference to Fig. 2, the tube wall of the first flue 61 is provided with the first charge pipe 611.Open flue valve 5, the path that raw material enter rotary kiln 1 is: after the first charge pipe 611, first flue 61, second cyclone cylinder 22, second flue 62, the 3rd cyclone cylinder 23, the 3rd flue 63, the 4th cyclone cylinder 24, the 4th flue 64, the 5th cyclone cylinder 25 and the 5th flue 65, enter in rotary kiln 1.
With reference to Fig. 2, feed in raw material in process for avoiding the first charge pipe 611, raw material are strayed in reactor 3, in the present embodiment, air inlet pipe 32 is provided with the first switch valve 321, escape pipe 33 is provided with second switch valve 331, when the first charge pipe 611 feeds in raw material, the first switch valve 321 and second switch valve 331 are closed.
In the present embodiment, denitrification apparatus also comprises support, and support is used for support suspension preheater, and for reducing the height of support, in the present embodiment, air inlet pipe and escape pipe are connected with the second flue respectively.
In the present embodiment, suspended preheater also can omit the first cyclone cylinder, after omitting the first cyclone cylinder, the first flue directly and air communication, to realize the fume emission after denitration in air.
Embodiment two
Be with embodiment one difference, in embodiment two, the position that reactor is connected with suspended preheater changes.
With reference to Fig. 4, concrete, air inlet pipe 32 one end is connected with the upper end of reactor 3, air inlet pipe 32 other end is connected with the first flue 61, escape pipe 33 one end is connected with the lower end of reactor 3, escape pipe 33 other end is connected with the first flue 61, and the tube wall of the first flue 61 between air inlet pipe 32 and escape pipe 33 is provided with flue valve 5.
Compared with embodiment one, in the present embodiment, flue gas is before entering reactor, and need first through the second cyclone cylinder, this structure can reduce the content that flue gas enters dust in hot precipitator further.
With reference to Fig. 4, the escape pipe 33 of the present embodiment can be installed the second charge pipe 332, second charge pipe 332
Embodiment three
Be with embodiment one difference, in embodiment three, the position that reactor is connected with suspended preheater changes.
Concrete, air inlet pipe one end is connected with the upper end of reactor, the air inlet pipe other end is connected with the second flue, escape pipe one end is connected with the lower end of reactor, the escape pipe other end is connected with the first flue, and the tube wall of the first flue between air inlet pipe and escape pipe is provided with flue valve.
Compared with embodiment one, in the present embodiment, air inlet pipe is connected with the second flue, can reduce the height of hot precipitator.
Embodiment four
Be with embodiment one difference, in embodiment four, escape pipe is only connected with the gas outlet of reactor, is directly disposed to air from the flue gas in reactor by escape pipe.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and those of ordinary skill in the art should be understood that and the present invention includes but the content being not limited to accompanying drawing and describing in detailed description of the invention above.Any amendment not departing from function and structure principle of the present invention all will comprise within the scope of the appended claims.
Claims (10)
1. the denitrification apparatus of a rotary kiln, comprise suspended preheater and reactor, described suspended preheater comprises multiple cyclone cylinder, flue is connected with between adjacent described cyclone cylinder, described reactor is provided with air inlet and gas outlet, it is characterized in that: be connected with hot precipitator between the air inlet of described reactor and described flue.
2. the denitrification apparatus of rotary kiln as claimed in claim 1, it is characterized in that: described multiple cyclone cylinder comprises the first cyclone cylinder, second cyclone cylinder, 3rd cyclone cylinder, 4th cyclone cylinder and the 5th cyclone cylinder, the first flue is connected with between described first cyclone cylinder and described second cyclone cylinder, the second flue is connected with between described second cyclone cylinder and described 3rd cyclone cylinder, described hot precipitator is connected between the air inlet of reactor and the second flue, the 3rd flue is connected with between described 3rd cyclone cylinder and described 4th cyclone cylinder, the 4th flue is connected with between described 4th cyclone cylinder and described 5th cyclone cylinder, the 5th flue is connected with between described 5th cyclone cylinder and described rotary kiln.
3. the denitrification apparatus of rotary kiln as claimed in claim 2, is characterized in that: the gas outlet of described reactor is connected with described second flue, the pipeline of described second fume pipe between air inlet and gas outlet is provided with flue valve.
4. the denitrification apparatus of rotary kiln as claimed in claim 1, it is characterized in that: described suspended preheater comprises the first cyclone cylinder, second cyclone cylinder, 3rd cyclone cylinder, 4th cyclone cylinder and the 5th cyclone cylinder, the first flue is connected with between described first cyclone cylinder and described second cyclone cylinder, described hot precipitator is connected between the air inlet of reactor and the first flue, the second flue is connected with between described second cyclone cylinder and described 3rd cyclone cylinder, the 3rd flue is connected with between described 3rd cyclone cylinder and described 4th cyclone cylinder, the 4th flue is connected with between described 4th cyclone cylinder and described 5th cyclone cylinder, the 5th flue is connected with between described 5th cyclone cylinder and described rotary kiln.
5. the denitrification apparatus of rotary kiln as claimed in claim 4, is characterized in that: the gas outlet of described reactor is connected with described first flue, the pipeline of described first fume pipe between air inlet and gas outlet is provided with flue valve.
6. the denitrification apparatus of the rotary kiln as described in one of claim 1 to 5, is characterized in that: described hot precipitator lower end is provided with the cleaning shaft for connecting flue, and described cleaning shaft is provided with cleaning shaft valve.
7. the denitrification apparatus of the rotary kiln as described in one of claim 1 to 5, it is characterized in that: between the air inlet of described reactor and flue, be connected with air inlet pipe, described hot precipitator is arranged in air inlet pipe, and the pipeline of described air inlet pipe between hot precipitator and flue is provided with the first switch valve.
8. the denitrification apparatus of the rotary kiln as described in one of claim 1 to 5, is characterized in that: be connected with escape pipe between the gas outlet of described reactor and flue, and described escape pipe is provided with second switch valve.
9. the denitrification apparatus of rotary kiln as claimed in claim 8, is characterized in that: described escape pipe is provided with charge pipe.
10. the denitrification apparatus of the rotary kiln as described in one of claim 2 to 5, is characterized in that: described first cyclone cylinder is provided with offgas duct.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520153451.9U CN204522750U (en) | 2015-03-18 | 2015-03-18 | A kind of denitrification apparatus of rotary kiln |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520153451.9U CN204522750U (en) | 2015-03-18 | 2015-03-18 | A kind of denitrification apparatus of rotary kiln |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108465367A (en) * | 2018-05-11 | 2018-08-31 | 熊燕飞 | A kind of desulfurization denitration method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108465367A (en) * | 2018-05-11 | 2018-08-31 | 熊燕飞 | A kind of desulfurization denitration method |
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