CN204901755U - Reduce cement rotary kiln NOX's coal slurry spray gun - Google Patents
Reduce cement rotary kiln NOX's coal slurry spray gun Download PDFInfo
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- CN204901755U CN204901755U CN201520696095.5U CN201520696095U CN204901755U CN 204901755 U CN204901755 U CN 204901755U CN 201520696095 U CN201520696095 U CN 201520696095U CN 204901755 U CN204901755 U CN 204901755U
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- slurry
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Abstract
The utility model discloses a reduce cement rotary kiln NOX's coal slurry spray gun, include to be used for leading to the outer tube of coal slurry and the inner tube that is used for leading to compressed air that should locate this interior outside of tubes by outer pipe box, other is equipped with atomizing nozzle and blocks up one of inner tube and outer tube is served, has mixed atomizing passageway in this atomizing nozzle, and the interior port that should mix the atomizing passageway feeds through with the interior lumen of inner tube and the outer lumen of outer tube respectively interior lumen and the junction of mixing the atomizing passageway are equipped with the filter equipment who is used for preventing the coal slurry and passes through. This reduce cement rotary kiln NOX's coal slurry spray gun lumen and the junction of mixing the atomizing passageway is equipped with the filter equipment who is used for preventing the coal slurry and passes through including because, can prevent the coal slurry because the jam that the inner tube led to the fact is gone into to the pressure mistake, guarantees the nozzle stable performance, improves its life.
Description
Technical field
The utility model relates to a kind of reduction Modern Dry Process Cement Plant NO
xthe device of discharge capacity specifically, is a kind of for reducing cement rotary kiln NO
xwater-coal-slurry spraying gun.
Background technology
New dry cement production technology is the leading type technology of current cement production process, but because of the operating feature of its high-temperature calcination, inevitably produces oxynitrides in the offgas and (be referred to as NO
x), it is one of cement industry primary waste gases pollutant.At present, domestic and international new type nonaqueous cement industry denitration technology has noncatalytic reduction (SNCR), catalysis selected deoxidizing method (SCR), electronic beam method, reducing atmosphere method etc., consider the factors such as investment cost, operation stability, maintenance cost, current said method all fails to obtain significant results in cement industry.Along with continuous aggravation and China the improving constantly environmental requirement of global atmosphere pollution situation, need badly a kind of effective and meet the Novel denitration technology of the current cement industry current situation of China.
CN1804459A discloses a kind of re-burning denitration of coal water slurry method and device thereof, denitration efficiency can be made to reach more than 50%, but this method is only applicable to heat power plant boiler denitration.CN101907295A discloses a kind of combustion water coal and reduces NO
xburner and combustion method, its combustion characteristics and physical dimension still can not be used in new type nonaqueous cement industrial rotary kiln.US5746144 discloses a kind of technique of power plant boiler combined desulfurization and denitration, utilizes the spray gun of special construction and nozzle above boiler economizer, spray into the mixed liquors such as water-coal-slurry, lime, urea thus reaches the effect of desulphurization denitration.US2005/0284347A1 discloses a kind of by water spray reduction NO in rotary kiln
xthe method of discharge, can by firing system NO
xdischarge capacity reduces about 10%-20%, injection flow rate is the U.S. gallon per minute (about 15.14-20.06 liter/min) of 4-5.3, but it is the test on 230t/d large-scale production line, not research experiment on large-scale production line, and injection flow rate need increase along with the increase of production scale and coal consumption.The open a kind of reduction cement rotary kiln NO of CN202221081
xwater-coal-slurry spraying gun can solve the problems of the technologies described above, but the Y type atomizer of this spray gun spray time due to jet power larger, part water-coal-slurry is caused to enter interior pipeline, in the course of time accumulate gradually at inner tube wall and form blocking, thus affect the normal use of water-coal-slurry spraying gun, cause quality unstable, service life reduces.
Summary of the invention
In order to overcome above-mentioned defect, it is simple that the utility model provides a kind of structure, and easy to use, steady quality reduces cement rotary kiln NO reliably
xwater-coal-slurry spraying gun.
The utility model in order to the technical scheme solving its technical problem and adopt is: a kind ofly reduce cement rotary kiln NO
xwater-coal-slurry spraying gun, comprise for the outer tube of water flowing coal slurry with for logical compressed-air actuated interior pipe, this outer tube sleeve is located at outside this interior pipe, separately being provided with atomizer gets lodged on one end of described inner and outer tubes, there is in this atomizer mixed aerosol passage, the inner port of this mixed aerosol passage is communicated with the outer lumen of outer tube with tube chamber in interior pipe respectively, it is characterized in that: be provided with the filter for preventing water-coal-slurry from passing through in the junction of described interior tube chamber and mixed aerosol passage.
As further improvement of the utility model, described inner and outer tubes are coaxially arranged, be provided with between described outer tube wall and outer wall of inner tube uniform along this interior pipe circumference in pipe holder.
As further improvement of the utility model, described filter is filter screen.
As further improvement of the utility model, described nozzle is Y type atomizer.
As further improvement of the utility model, also comprise torch oil gun pipeline, described outer tube is supported in this torch oil gun pipeline by outer pipe holder.
The beneficial effects of the utility model are: this reduction cement rotary kiln NO
xwater-coal-slurry spraying gun in cement rotary kiln, spray into the thermal regulation that suitable quantity of water coal slurry not only can not affect Cement clinker buring, the NO of firing system can also be reduced to a certain extent
xdischarge capacity; Water-coal-slurry enters in rotary kiln after atomization, carburation by evaporation in high-temperature flue gas environment, and forms certain density CO and H
2distributed areas, by the NO in firing system
xreaction is converted into N
2; Spraying into of water-coal-slurry reduces Three-channel Coal Burner outlet flame temperature peak, containment thermal NO
xgeneration; Water-coal-slurry spraying gun structure is simple, easy to operate, and makes full use of idle Three-channel Coal Burner torch oil gun pipeline, does not affect normal operation and the operation of coal burner; The cost of material of preparation water-coal-slurry is low, and equipment investment is few, easy care, and system operation cost is low; Being provided with the filter for preventing water-coal-slurry from passing through in the junction of interior tube chamber and mixed aerosol passage, preventing the water-coal-slurry blocking that interior pipe causes because pressure is strayed into, ensure that nozzle performance is stablized, improve its service life.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the A-A cross-sectional view in Fig. 1;
Fig. 3 is method of denitration schematic flow sheet;
Fig. 4 is the atomizer enlarged drawing in Fig. 1.
By reference to the accompanying drawings, make the following instructions:
1---interior pipe 2---outer tube
3---pulp-inlet pipe 4---outer pipe holder
5---atomizer 6---torch oil gun pipeline
7---interior pipe holder 8---outer lumen
9---interior tube chamber 10---mixed aerosol passage
11---rotary kiln 12---kiln head cover
13---coal injection pipe 14---burner
15---air compressor 16---ball valve
17---screw pump 18---agitator tank
19---kiln hood operating platform 20---air communication passage
21---water-coal-slurry communicating passage 91---filter
Detailed description of the invention
Below in conjunction with accompanying drawing, a preferred embodiment of the present utility model is elaborated.But protection domain of the present utility model is not limited to following embodiment, the simple equivalence namely in every case done with the utility model claim and description changes and modifies, and all still belongs within the utility model patent covering scope.
A kind of reduction cement rotary kiln NO
xwater-coal-slurry spraying gun, comprise the coaxial interior pipe 1 that arranges and outer tube 2, interior pipe enters pressure-air, and outer tube injects water-coal-slurry by pulp-inlet pipe 3.Be provided with between wall and outer wall of inner tube within the outer tube uniform along interior pipe circumferential and axial in pipe holder 7.Outer tube outer wall is welded with bracing frame i.e. outer pipe holder 4, and the circumferential and axial also along outer tube are uniform.Gun head is provided with Y type water-coal-slurry atomizing nozzle 5, has mixed aerosol path 10 in nozzle, and the inner of mixed aerosol passage is connected with outer lumen 8 with interior tube chamber 9 with water-coal-slurry connection respectively by air communication passage 20.Simultaneously be provided with the filter 91 i.e. filter screen for preventing water-coal-slurry from passing through in the junction of interior tube chamber and mixed aerosol passage, see Fig. 4, because air communication passage 20, water-coal-slurry communicating passage 21 and mixed aerosol path 10 form y-type structure, therefore be referred to as y-type nozzle.Whole nozzle is placed in the torch oil gun pipeline 6 of triple-channel burner 14.See Fig. 2, burner 14 is connected with coal injection pipe 13.Coal injection pipe 13 is arranged on the kiln head cover 12 of the end of rotary kiln 11.Water spray coal slurry and the circulating line of pressure-air respectively between inner and outer pipes (outer lumen 8) and pipeline (interior tube chamber 9) enter atomizer 5, finally spray from the atomization of mixed aerosol path 10, enter in rotary kiln 11.Be placed with water-coal-slurry agitator tank 18 burning till on kiln hood operating platform 19, obtained satisfactory water-coal-slurry delivers to the pulp-inlet pipe 3 of water-coal-slurry spraying gun through screw pump 17.Pressure-air is provided by air compressor 15.
Pour coal dust, water, stabilizing agent into water-coal-slurry agitator tank after metering, stir 30-60min under normal temperature and pressure, obtained concentration and viscosity are applicable to the water-coal-slurry applied, and are delivered to spray gun afterbody pulp-inlet pipe through screw pump.Control screw pump outlet pressure within the scope of 1-6MPa, by adjusting screw(rod) pump discharge ball valve 16, control water-coal-slurry mass flow.Pressure-air again air compressor machine provides, and by interface tube in Pipeline transport to spray gun afterbody, controlling compressed air pressure is within the scope of 0.1-1MPa, to ensure good atomizing effect.Firing system NO
xdischarge value by be arranged on kiln tail C1 level cylinder export flue gas analyzer automatic on-line detect.Spray into water-coal-slurry continuously, the emissions data of observation NOX.
The present invention is owing to being provided with the filter 91 i.e. filter screen for preventing water-coal-slurry from passing through in the junction of interior tube chamber and mixed aerosol passage, it can certainly be the device that other play a role in filtering, make water-coal-slurry can not be strayed into interior pipe when being injected mixed aerosol passage by pulp-inlet pipe and cause interior blockage, thus ensure that nozzle performance is stablized, improve its service life.
Embodiment 1:
Obtained mass concentration is 10% water-coal-slurry, controlling its feed flow is 1000kg/h, and screw pump outlet pressure is 1.5MPa, and high-pressure air pressure is 0.501MPa, total run time is 60min, and kiln tail preheater C1 exports NOX discharge value and drops to about 790ppm by testing front 870ppm.
Embodiment 2:
Obtained mass concentration is 10% water-coal-slurry, controlling its feed flow is 1000kg/h, and screw pump outlet pressure is 1.5MPa, and high-pressure air pressure is 0.501MPa, total run time is 60min, and kiln tail preheater C1 exports NOX discharge value and drops to about 710ppm by testing front 846ppm.
Embodiment 3:
Obtained mass concentration is 10% water-coal-slurry, controlling its feed flow is 1000kg/h, and screw pump outlet pressure is 1.5MPa, and high-pressure air pressure is 0.501MPa, total run time is 60min, and kiln tail preheater C1 exports NOX discharge value and drops to about 720ppm by testing front 880ppm.
Claims (5)
1. one kind is reduced the water-coal-slurry spraying gun of cement rotary kiln NOX, comprise for the outer tube (2) of water flowing coal slurry with for logical compressed-air actuated interior pipe (1), this outer tube sleeve is located at outside this interior pipe, separately being provided with atomizer (5) gets lodged on one end of described inner and outer tubes, there is in this atomizer mixed aerosol passage (10), the inner port of this mixed aerosol passage is communicated with the outer lumen (8) of outer tube with tube chamber (9) in interior pipe respectively, it is characterized in that: be provided with the filter (91) for preventing water-coal-slurry from passing through at described mixed aerosol passage near the junction of itself and interior official jargon.
2. the water-coal-slurry spraying gun of reduction cement rotary kiln NOX according to claim 1, is characterized in that: described inner and outer tubes are coaxially arranged, be provided with between described outer tube wall and outer wall of inner tube uniform along this interior pipe circumference in pipe holder (7).
3. the water-coal-slurry spraying gun of reduction cement rotary kiln NOX according to claim 1, is characterized in that: described filter is filter screen.
4. the water-coal-slurry spraying gun of reduction cement rotary kiln NOX according to claim 1, is characterized in that: described nozzle is Y type atomizer.
5. the water-coal-slurry spraying gun of reduction cement rotary kiln NOX according to claim 1, is characterized in that: also comprise torch oil gun pipeline, and described outer tube is supported in this torch oil gun pipeline by outer pipe holder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520696095.5U CN204901755U (en) | 2015-09-10 | 2015-09-10 | Reduce cement rotary kiln NOX's coal slurry spray gun |
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| CN201520696095.5U CN204901755U (en) | 2015-09-10 | 2015-09-10 | Reduce cement rotary kiln NOX's coal slurry spray gun |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107469608A (en) * | 2017-09-11 | 2017-12-15 | 苏州中材建设有限公司 | Reducing agent sprayer unit for denitrating flue gas |
| CN109264753A (en) * | 2017-07-18 | 2019-01-25 | 神华集团有限责任公司 | Raw slurry spraying gun, alumina rotary kiln and the method for spraying raw slurry |
-
2015
- 2015-09-10 CN CN201520696095.5U patent/CN204901755U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109264753A (en) * | 2017-07-18 | 2019-01-25 | 神华集团有限责任公司 | Raw slurry spraying gun, alumina rotary kiln and the method for spraying raw slurry |
| CN109264753B (en) * | 2017-07-18 | 2021-08-17 | 国家能源投资集团有限责任公司 | Raw slurry spray gun, alumina clinker kiln and raw slurry spraying method |
| CN107469608A (en) * | 2017-09-11 | 2017-12-15 | 苏州中材建设有限公司 | Reducing agent sprayer unit for denitrating flue gas |
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