CN104132337A - Multi-channel cement oxygen enrichment low-carbon burner - Google Patents
Multi-channel cement oxygen enrichment low-carbon burner Download PDFInfo
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- CN104132337A CN104132337A CN201410382025.2A CN201410382025A CN104132337A CN 104132337 A CN104132337 A CN 104132337A CN 201410382025 A CN201410382025 A CN 201410382025A CN 104132337 A CN104132337 A CN 104132337A
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- wind
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- burner
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The invention discloses a multi-channel cement oxygen enrichment low-carbon burner which is used in a calcining technology stage of a rotary cement kiln. An oxygen enrichment air pressure storage tank is connected to inlets of a direct flow air fan, a center air fan and a swirl air fan respectively. Outlets of the fans are connected to a multi-channel pipeline of the burner through pipelines of the outlets. The multi-channel pipeline of the burner is communicated with the rotary cement kiln and provides air for the rotary cement kiln for combustion supporting, and flame temperature is improved. According to the multi-channel cement oxygen enrichment low-carbon burner, oxygen is reduced during burning, burning temperature and flame transmission speed can be improved, the energy using rate is improved, and fuel is saved compared with common air burning supporting. Fuel can be saved by at least 30% by oxygen enrichment low-nitrogen burning supporting compared with common air burning supporting, emission of smoke, oxynitride and oxysulfide can be lowered, accordingly, atmospheric pollution is lowered, the quality of clinker and cement can be improved, and the production cost of cement is lowered.
Description
Technical field
The present invention is a kind of multichannel cement oxygen enrichment low NO that uses oxygenized air combustion supporting, in the clinker burning operation stage for the rotary kiln of New Type Dry-process Cement Production.
Background technology
The at present production of new type nonaqueous cement a large amount of coal that burns in thermal decomposition in advance, rotary kiln clinker sintering process kiln outside respectively, use normal air oxygen content 21% in combustion process, mostly exist local anoxic, produce imperfect combustion, a large amount of combustibles and waste gas major part are that nitrogen oxide becomes flue dust and drains, and waste energy and cause atmosphere pollution.
Summary of the invention
Based on above-mentioned the deficiencies in the prior art, the invention provides a kind of multichannel cement oxygen enrichment low NO, be characterized in having greatly reduced the input quantity of nitrogen in improving oxygen-rich concentration, thereby significantly improve the thermal efficiency, greatly reduce heat loss due to exhaust gas, reduce especially generation and the discharge of nitrogen oxide of harmful substance, and can use cheap colm, reduced the cost of manufacture of cement.
Technical scheme of the present invention is:
A kind of multichannel cement oxygen enrichment low NO, is mainly made up of oxygen rich air generation device, direct current wind oxygen-enriched air pressure vessel, eddy flow wind oxygen-enriched air pressure vessel, centre wind oxygen-enriched air pressure vessel, direct current wind blower fan, centre wind blower fan, eddy flow wind blower fan, coal wind blower fan and burner multichannel pipeline.
The entrance of direct current wind oxygen-enriched air pressure vessel, eddy flow wind oxygen-enriched air pressure vessel and centre wind oxygen-enriched air pressure vessel is connected with oxygen rich air generation device; Direct current wind oxygen-enriched air pressure vessel, eddy flow wind oxygen-enriched air pressure vessel and centre wind oxygen-enriched air pressure vessel are connected respectively to the entrance of direct current wind blower fan, centre wind blower fan and eddy flow wind blower fan; The outlet of direct current wind blower fan, centre wind blower fan and eddy flow wind blower fan by pipeline-direct current wind pipeline, centre wind pipeline and eddy flow wind pipeline separately, is connected respectively to burner multichannel pipeline again; Meanwhile, coal wind blower fan is also connected on burner multichannel pipeline by coal wind pipeline.
Burner multichannel pipeline is a multilayer pipe being set in together, mutually isolated between each layer of pipe; Direct current wind pipeline, centre wind pipeline, eddy flow wind pipeline and coal wind pipeline are communicated to respectively in the different layer pipes of burner multichannel pipeline; It is that its air feed is combustion-supporting that burner multichannel pipeline leads in cement rotary kiln.
Direct current wind oxygen-enriched air pressure vessel, eddy flow wind oxygen-enriched air pressure vessel, centre wind oxygen-enriched air pressure vessel are connected to respectively the entrance of direct current wind blower fan, centre wind blower fan and eddy flow wind blower fan by direct current wind oxygen-enriched air air intake valve, centre wind oxygen-enriched air air intake valve and eddy flow wind oxygen-enriched air air intake valve by the pipeline connecting separately.
On the pipeline between direct current wind oxygen-enriched air air intake valve and direct current wind blower fan, be provided with direct current wind normal air air intake valve; On the pipeline between centre wind oxygen-enriched air air intake valve and centre wind blower fan, be provided with centre wind normal air air intake valve; On the pipeline between eddy flow wind oxygen-enriched air air intake valve and eddy flow wind blower fan, be provided with eddy flow wind normal air air intake valve.
Between direct current wind fan outlet and direct current wind pipeline, be provided with direct current wind firing rate valve; Between centre wind fan outlet and centre wind pipeline, be provided with centre wind firing rate valve; Between eddy flow wind fan outlet and eddy flow wind pipeline, be provided with direct current wind firing rate valve.
Enter the porch of burner multichannel pipeline at the end of direct current wind pipeline, be provided with direct current wind oxygen-rich concentration sensor; Enter the porch of burner multichannel pipeline at the end of centre wind pipeline, be provided with centre wind oxygen-rich concentration sensor; Enter the porch of burner multichannel pipeline at the end of eddy flow wind pipeline, be provided with eddy flow wind oxygen-rich concentration sensor.
Direct current wind pipeline leads to the outermost direct current wind of burner multichannel pipeline passage, eddy flow wind pipeline leads to the burner multichannel pipeline eddy flow wind passage of several second layers outward, coal wind pipeline leads to the coal wind duct of outer several the 3rd layer of burner multichannel pipeline, and centre wind pipeline leads to the center wind duct at burner multichannel pipeline center.
Oxygen rich air generation device is the source of the gas that produces oxygen rich air.
Use multichannel cement oxygen enrichment low NO to have following advantage compared with original burner:
In multichannel cement oxygen enrichment low NO combustion process due to the minimizing of nitrogen, can improve ignition temperature and flame propagation velocity, capacity usage ratio improves, and a large amount of minimizing of waste gas causes heat loss to reduce in addition, thereby the low nitrogen of oxygen enrichment is combustion-supporting than the combustion-supporting fuel saving of normal air.Calculate according to theory, if reach same ignition temperature, the low nitrogen of oxygen enrichment is combustion-supporting than the combustion-supporting fuel saving of normal air more than 30%, can reduce the discharge of flue dust, nitrogen oxide and oxysulfide, reduce discharge amount of exhaust gas 60%-70%, thereby reduce atmosphere pollution, it is one of preferred approach reducing pollution and discharge of poisonous waste, oxygen enrichment low nitrogen burning has improved flame temperature, thereby can improve the quality of grog and cement, has improved 3 days, 28 days intensity.Be specially:
1 has reduced heat loss: owing to containing 70% useless nitrogen in former once wind, be heated to 1400 degree left and right will in calcination process this part nitrogen, and most nitrogen is not participated in reflection, discharge with flue dust, so wasted a large amount of heat energy, use oxygen-enriched air to replace after original wind, oxygen content is brought up to 50%-80%, wherein nitrogen content greatly reduces, and therefore can reduce this part heat loss.
2 abundant Reasonable Combustions.For 3 passage oxygenation selectively, make different passages obtain concentration, different oxygen-enriched air and the jet velocities of flow, make coal-fired fully burning, flame temperature, radiation intensity significantly promote, thereby the utilization rate of heat energy is significantly improved, fall the low consumed while and improved again quality.
3 reduce manufacture of cement cost: multichannel cement oxygen enrichment low NO can use colm in a large number, regulate the oxygen concentration of each passage can strengthen the ratio that uses colm, can also calcine industrial refuse and industrial waste, produce the cement products of high-quality simultaneously.
4 reduce the discharge of nitride NOx: owing to having increased oxygen, reduced the input quantity of nitrogen, can reduce the discharge of flue dust, nitrogen oxide and oxysulfide, thereby reduce atmosphere pollution, be to reduce to pollute and one of best approach of discharge of poisonous waste.
5 is simple in structure safe and reliable: the present invention is simple in structure, and floor space is little, and noise is little, non-secondary pollution, easy maintenance safety.
6 have tele-control system: can be former according to difference, fuel carries out Long-distance Control, oxygen concentration sensor is housed in system, for the operation actual conditions of rotary kiln, adjust the optimal proportion of the oxygen-enriched air of each passage, can give play to the optimum operation level of rotary kiln.
Brief description of the drawings
Fig. 1 is composition schematic diagram of the present invention.
Fig. 2 is the cross section enlarged drawing of burner multichannel pipeline.
Mark in figure:
1. oxygen rich air generation device; 2. direct current wind oxygen-enriched air pressure vessel; 3. eddy flow wind oxygen-enriched air pressure vessel; 4. centre wind oxygen-enriched air pressure vessel; 5. direct current wind oxygen-enriched air air intake valve; 6. centre wind oxygen-enriched air air intake valve; 7. eddy flow wind oxygen-enriched air air intake valve; 8. direct current wind normal air air intake valve; 9. centre wind normal air air intake valve; 10. eddy flow wind normal air air intake valve; 11. direct current wind blower fans; 12. centre wind blower fans; 13. eddy flow wind blower fans; 14. direct current wind firing rate valves; 15. centre wind firing rate valves; 16. eddy flow wind firing rate valves; 17. direct current wind pipelines; 18. centre wind pipelines; 19. eddy flow wind pipelines; 20. direct current wind oxygen-rich concentration sensors; 21. centre wind oxygen-rich concentration sensors; 22. eddy flow wind oxygen-rich concentration sensors; 23. coal wind blower fans; 24. coal wind pipelines; 25. burner multichannel pipelines; 26. direct current wind passages; 27. eddy flow wind passages; 28. coal wind ducts; 29. center wind ducts.
Detailed description of the invention
The multichannel cement oxygen enrichment low NO that the object of the invention is to utilize oxygen-enriched combustion technology to invent and apply in a kind of new manufacture of cement.
With reference to Fig. 1, the present invention is mainly made up of oxygen rich air generation device 1, direct current wind oxygen-enriched air pressure vessel 2, eddy flow wind oxygen-enriched air pressure vessel 3, centre wind oxygen-enriched air pressure vessel 4, direct current wind blower fan 11, centre wind blower fan 12, eddy flow wind blower fan 13, coal wind blower fan 23 and burner multichannel pipeline 25.Oxygen rich air generation device 1 is for producing the source of the gas of oxygen rich air, the entrance of direct current wind oxygen-enriched air pressure vessel 2, eddy flow wind oxygen-enriched air pressure vessel 3, centre wind oxygen-enriched air pressure vessel 4 is connected with oxygen rich air generation device 1 respectively, store the oxygen-enriched air of being sent into by oxygen rich air generation device 1, the high concentration oxygen rich gas of the 50%-80% that oxygen rich air generation device 1 can be produced is stored in storage tank.Direct current wind oxygen-enriched air pressure vessel 2, eddy flow wind oxygen-enriched air pressure vessel 3, centre wind oxygen-enriched air pressure vessel 4 are connected to respectively the entrance of direct current wind blower fan 11, centre wind blower fan 12 and eddy flow wind blower fan 13 by direct current wind oxygen-enriched air air intake valve 5, centre wind oxygen-enriched air air intake valve 6, eddy flow wind oxygen-enriched air air intake valve 7 by the pipeline connecting separately.The outlet of direct current wind blower fan 11, centre wind blower fan 12 and eddy flow wind blower fan 13 by pipeline-direct current wind pipeline 17, centre wind pipeline 18 and eddy flow wind pipeline 19 separately, is connected respectively to burner multichannel pipeline 25 again.Meanwhile, coal wind blower fan 23 is also connected on burner multichannel pipeline 25 by coal wind pipeline 24.Burner multichannel pipeline 25 is multilayer pipe that are set in together, mutually isolated between each layer of pipe.Direct current wind pipeline 17 leads to the outermost direct current wind passage 26 of burner multichannel pipeline 25, eddy flow wind pipeline 19 leads to the eddy flow wind passage 27 of burner multichannel pipeline 25 outer several second layers, coal wind pipeline 24 leads to the coal wind duct 28 of outer several the 3rd layer of burner multichannel pipeline 25, and centre wind pipeline 18 leads to the center wind duct 29 at burner multichannel pipeline 25 centers.It is that its air feed is combustion-supporting that burner multichannel pipeline 25 leads in this burner cement rotary kiln below.
For controlling the oxygen concentration of air intake gas in each passage, on the pipeline between direct current wind oxygen-enriched air air intake valve 5 and direct current wind blower fan 11, be provided with direct current wind normal air air intake valve 8, air can be blended in direct current wind oxygen-enriched air; On the pipeline between centre wind oxygen-enriched air air intake valve 6 and centre wind blower fan 12, be provided with centre wind normal air air intake valve 9, air can be blended in centre wind oxygen-enriched air; On the pipeline between eddy flow wind oxygen-enriched air air intake valve 7 and eddy flow wind blower fan 13, be provided with eddy flow wind normal air air intake valve 10, air can be blended in direct current wind oxygen-enriched air.Enter amount of jet and the effluxvelocity of burner multichannel pipeline 25 gases for controlling each pipeline, between 11 outlets of direct current wind blower fan and direct current wind pipeline 17, direct current wind firing rate valve 14 is set, between 12 outlets of centre wind blower fan and centre wind pipeline 18, centre wind firing rate valve 15 is set, between 13 outlets of eddy flow wind blower fan and eddy flow wind pipeline 19, eddy flow wind firing rate valve 16 is set.
For monitoring the oxygen concentration of each air intake gas, enter the porch of burner multichannel pipeline 25 at the end of direct current wind pipeline 17, be provided with direct current wind oxygen-rich concentration sensor 20; Enter the porch of burner multichannel pipeline 25 at the end of centre wind pipeline 18, be provided with centre wind oxygen-rich concentration sensor 21; Enter the porch of burner multichannel pipeline 25 at the end of eddy flow wind pipeline 19, be provided with eddy flow wind oxygen-rich concentration sensor 22.
Remote controlled 9 valves of the present invention, i.e. direct current wind oxygen-enriched air air intake valve 5, direct current wind normal air air intake valve 8 and direct current wind firing rate valve 14; Centre wind oxygen-enriched air air intake valve 6, centre wind normal air air intake valve 9 and centre wind firing rate valve 15; Eddy flow wind oxygen-enriched air air intake valve 7, eddy flow wind normal air air intake valve 10 and eddy flow wind firing rate valve 16.
The present invention can three sensing datas of remote collection, the i.e. data of direct current wind oxygen-rich concentration sensor 20, centre wind oxygen-rich concentration sensor 21 and eddy flow wind oxygen-rich concentration sensor 22.
The course of work of the present invention is:
The concentration of being produced by oxygen rich air generation device 1 is 50%-80% oxygen-enriched air, send into respectively direct current wind oxygen-enriched air pressure vessel 2, eddy flow wind oxygen-enriched air pressure vessel 3, in centre wind oxygen-enriched air pressure vessel 4, direct current wind oxygen-enriched air pressure vessel 2 is by direct current wind intake oxygen enrichment valve 5 and direct current wind normal air air intake valve 8, eddy flow wind oxygen-enriched air pressure vessel 3 is by centre wind oxygen-enriched air air intake valve 6 and centre wind normal air air intake valve 9, centre wind oxygen-enriched air pressure vessel 4 cooperatively interacts by eddy flow wind oxygen-enriched air air intake valve 7 and eddy flow wind normal air air intake valve 10, be made into certain concentration by oxygen-enriched air mixed respectively.Adjust the revolution of each blower fan, make oxygen-enriched air there is different flows, then adjust respectively direct current wind firing rate valve 14, centre wind firing rate valve 15, eddy flow wind firing rate valve 16, make oxygen-enriched air there is different speed.The oxygen-enriched air of variable concentrations, flow and the speed producing is transported in cement rotary kiln combustion-supporting by burner multichannel pipeline 25, thereby adjusts the shape of rotary kiln end flame, makes it reach best fired state.The present invention is by the oxygen-enriched air air inflow of three valve control direct current wind, centre wind and eddy flow wind, by the air inflow of three valve control normal air, be mixed into the rich gas gas of variable concentrations by valve, by three valve control oxygen-enriched air jet velocities, cancel original primary air fan in device, replace the normal air of former once wind with oxygen-enriched air.In running, gather each oxygen-enriched air concentration and other main duty parameter, 6 intake valves of Long-distance Control, 3 firing rate valves, change oxygen-rich concentration, flow and the jet velocity of each passage.
6 intake valves, 3 firing rate valves in the present invention can independently be controlled, and also can be connected to DCS system, are unified to control by middle control, and coal wind blower fan 23 also can be controlled by DCS system.
Claims (9)
1. a multichannel cement oxygen enrichment low NO, is characterized in that: be mainly made up of oxygen rich air generation device (1), direct current wind oxygen-enriched air pressure vessel (2), eddy flow wind oxygen-enriched air pressure vessel (3), centre wind oxygen-enriched air pressure vessel (4), direct current wind blower fan (11), centre wind blower fan (12), eddy flow wind blower fan (13), coal wind blower fan (23) and burner multichannel pipeline (25).
2. burner according to claim 1, is characterized in that: the entrance of direct current wind oxygen-enriched air pressure vessel (2), eddy flow wind oxygen-enriched air pressure vessel (3) and centre wind oxygen-enriched air pressure vessel (4) is connected with oxygen rich air generation device (1); Direct current wind oxygen-enriched air pressure vessel (2), eddy flow wind oxygen-enriched air pressure vessel (3) and centre wind oxygen-enriched air pressure vessel (4) are connected respectively to the entrance of direct current wind blower fan (11), centre wind blower fan (12) and eddy flow wind blower fan (13); The outlet of direct current wind blower fan (11), centre wind blower fan (12) and eddy flow wind blower fan (13) by pipeline-direct current wind pipeline (17), centre wind pipeline (18) and eddy flow wind pipeline (19) separately, is connected respectively to burner multichannel pipeline (25) again; Meanwhile, coal wind blower fan (23) is also connected on burner multichannel pipeline (25) by coal wind pipeline (24).
3. burner according to claim 1 and 2, is characterized in that: burner multichannel pipeline (25) is a multilayer pipe being set in together, mutually isolated between each layer of pipe; Direct current wind pipeline (17), centre wind pipeline (18), eddy flow wind pipeline (19) and coal wind pipeline (24) are communicated to respectively in the different layer pipes of burner multichannel pipeline (25); It is that its air feed is combustion-supporting that burner multichannel pipeline (25) leads in cement rotary kiln.
4. burner according to claim 1, is characterized in that: direct current wind oxygen-enriched air pressure vessel (2), eddy flow wind oxygen-enriched air pressure vessel (3), centre wind oxygen-enriched air pressure vessel (4) are connected to respectively the entrance of direct current wind blower fan (11), centre wind blower fan (12) and eddy flow wind blower fan (13) by direct current wind oxygen-enriched air air intake valve (5), centre wind oxygen-enriched air air intake valve (6) and eddy flow wind oxygen-enriched air air intake valve (7) by the pipeline connecting separately.
5. burner according to claim 4, is characterized in that: on the pipeline between direct current wind oxygen-enriched air air intake valve (5) and direct current wind blower fan (11), be provided with direct current wind normal air air intake valve (8); On the pipeline between centre wind oxygen-enriched air air intake valve (6) and centre wind blower fan (12), be provided with centre wind normal air air intake valve (9); On the pipeline between eddy flow wind oxygen-enriched air air intake valve (7) and eddy flow wind blower fan (13), be provided with eddy flow wind normal air air intake valve (10).
6. according to the burner described in claim 1,4 or 5, it is characterized in that: between direct current wind blower fan (11) outlet and direct current wind pipeline (17), be provided with direct current wind firing rate valve (14); Between centre wind blower fan (12) outlet and centre wind pipeline (18), be provided with centre wind firing rate valve (15); Between eddy flow wind blower fan (13) outlet and eddy flow wind pipeline (19), be provided with direct current wind firing rate valve (16).
7. burner according to claim 2, is characterized in that: enter the porch of burner multichannel pipeline (25) at the end of direct current wind pipeline (17), be provided with direct current wind oxygen-rich concentration sensor (20); Enter the porch of burner multichannel pipeline (25) at the end of centre wind pipeline (18), be provided with centre wind oxygen-rich concentration sensor (21); Enter the porch of burner multichannel pipeline (25) at the end of eddy flow wind pipeline (19), be provided with eddy flow wind oxygen-rich concentration sensor (22).
8. according to the burner described in claim 2 or 3, it is characterized in that: direct current wind pipeline (17) leads to burner multichannel pipeline (25) outermost direct current wind passage (26), eddy flow wind pipeline (19) leads to the eddy flow wind passage (27) of the outer number of burner multichannel pipeline (25) second layer, coal wind pipeline (24) leads to the coal wind duct (28) of outer several the 3rd layer of burner multichannel pipeline (25), and centre wind pipeline (18) leads to the center wind duct (29) at burner multichannel pipeline (25) center.
9. burner according to claim 1, is characterized in that: oxygen rich air generation device (1) is for producing the source of the gas of oxygen rich air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410382025.2A CN104132337A (en) | 2014-08-06 | 2014-08-06 | Multi-channel cement oxygen enrichment low-carbon burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410382025.2A CN104132337A (en) | 2014-08-06 | 2014-08-06 | Multi-channel cement oxygen enrichment low-carbon burner |
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| CN104132337A true CN104132337A (en) | 2014-11-05 |
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| CN201410382025.2A Pending CN104132337A (en) | 2014-08-06 | 2014-08-06 | Multi-channel cement oxygen enrichment low-carbon burner |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113776045A (en) * | 2021-08-19 | 2021-12-10 | 深圳世能科泰能源技术股份有限公司 | Multichannel rotary kiln combustor with directional oxygen enrichment combustion supporting function |
| CN114280219A (en) * | 2021-12-29 | 2022-04-05 | 中国人民解放军战略支援部队航天工程大学 | Multifunctional mixing combustion experimental device |
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