CN105423333A - High-temperature oxygen-enrichment type steam-injection boiler - Google Patents
High-temperature oxygen-enrichment type steam-injection boiler Download PDFInfo
- Publication number
- CN105423333A CN105423333A CN201510756257.4A CN201510756257A CN105423333A CN 105423333 A CN105423333 A CN 105423333A CN 201510756257 A CN201510756257 A CN 201510756257A CN 105423333 A CN105423333 A CN 105423333A
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- Prior art keywords
- oxygen
- boiler
- enriched
- steam
- temperature
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/007—Supplying oxygen or oxygen-enriched air
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
Abstract
The invention discloses a high-temperature oxygen-enrichment type steam-injection boiler. The steam-injection boiler comprises a boiler body, a radiation section and an oxygen-enriched air preheating section. The radiation section is arranged in an inner cavity of the boiler body, and the oxygen-enriched air preheating section is arranged outside the boiler body. The boiler further comprises a feed pump, a mixer, a steam-water separator, a header and a burner. According to the high-temperature oxygen-enrichment type steam-injection boiler, a water-feeding preheater and a convection section of an existing boiler are omitted; in the oxygen-enriched air preheating section, when high-temperature smoke flows through a heat accumulator, heat is transmitted to the heat accumulator which then continuously rotates to transmit the heat to air, and therefore the oxygen-enriched air is turned into high-temperature oxygen-enriched air. Through such continuous circulation, the high-temperature oxygen-enriched air is continuously supplied to the interior of the steam-injection boiler, high-temperature oxygen-enriched combustion is achieved, stability of flames in the boiler is guaranteed, and therefore the working condition in the boiler is not prone to fluctuation. By means of the combustion mode, fuel can be saved, the steam generating rate is increased, the flame length is increased, temperature distribution in the boiler is uniform, and the emission concentration of nitric oxides is lowered.
Description
Technical field
The present invention relates to a kind of uphole steam generator, particularly the high-temperature oxygen-enriched formula injection boiler of a kind of thickened oil recovery.
Background technology
Along with CO
2trapping, seal up for safekeeping and the deepening continuously of research on utilization, CO
2the displacement of reservoir oil day by day comes into one's own.Also be widely used with the oil recovery by heating equipment injection boiler of steam flooding simultaneously.Oxygen-enriched combustion technology is applied on injection boiler and traps CO by numerous researcher thus
2, realize the Poly-generation that product resourceization utilizes.Oxygen-enriched combusting adopts to come combustion-supporting than air hyperoxic in air.Current oxygen-enriched combustion technology especially local oxygen enriching technology successfully promotes the use of on fuel oil, gas steam injection boiler, and obtains significant economic benefit and social benefit, and fractional energy savings more than 4%, CO declines more than 80%.Although oxygen-enriched combusting has remarkable result on fractional energy savings, its NO
xconcentration of emission advantage is not given prominence to.
HTAC and Regenerative Combustion Technology, it adopts heat storage " limit " Mist heat recovering.Flue gas and air flow through heat storage to realize heat transfer in turn, when flue gas flows through heat storage, are heated by heat storage.When air flows through heat storage, heat storage is cooled, and air is heated, and air themperature can be elevated to more than 1000 DEG C.After air after preheating enters burner hearth, due to high velocity jet, form a low-pressure area, take out draw around low speed or static combustion product formed one containing oxysome volume concentrations be significantly less than 21% oxygen deprivation high temperature gas flow.Gaseous fuel (or atomized liquid fuel) sprays into after in stove through nozzle, high-temperature low-oxygen Diffusion of gas stream mixing therewith, occur and the diverse high-temperature and low-oxygen combustion of traditional combustion, but in the exhaust smoke level improving air burning quality and reduction unit of fuel, there is major defect in it.
Each pipeline of injection boiler frequently occurs owing to corroding the pipe explosion accident caused at present in addition, and corrosion is directly relevant with the temperature levels in stove, and the temperature difference of injection boiler different parts can produce temperature difference corrosion.
Summary of the invention
The object of this invention is to provide a kind of efficient, energy-conservation and high-temperature oxygen-enriched formula injection boiler that pollutant emission is low.
Object of the present invention is achieved through the following technical solutions:
A kind of high-temperature oxygen-enriched formula injection boiler, comprise body of heater, radiant section and oxygen-enriched air preheating section, described radiant section is arranged on body of heater inner chamber, and described oxygen-enriched air preheating section is arranged on outside body of heater; Boiler also comprises feed pump, blender, steam-water separator, collection header and burner; Blender is respectively with feed pump, radiant section and collect header and be communicated with, and steam-water separator is respectively with radiant section and collect header and be communicated with, and burner is communicated with oxygen-enriched air preheating section with body of heater respectively.
Described oxygen-enriched air preheating section is regenerative air preheater.
Described regenerative air preheater is connected with air blast by oxygen-enriched inlet pipeline.
Described regenerative air preheater is connected with smoke discharge tube road.
Described steam-water separator and collection header are arranged in outside body of heater.
Described collection header is connected with blowoff valve.
Between described collection header and blender, saturation water pipeline II is provided with check-valves.
The combustion adjuvant that described oxygen-enriched air preheating section adopts is oxygen-enriched air or regular air.
The invention has the advantages that: HTAC and oxygen-enriched combustion technology are combined, form high-temperature oxygen-enriched combustion technology, and be applied on injection boiler, high-temperature oxygen-enriched air adopts regenerative air preheater to produce, can realize the without interruption high-temperature oxygen-enriched air in stove, ensure that the stability of furnace flame, thus ensure the stability of inner operating, compensate for the deficiency of suitching type Regenerative Combustion System, utilize the waste heat of flue gas fully, improve the effective rate of utilization of fuel, fuel availability improves more than 20% than conventional injection boiler, steam generating capacity improves more than 10%, pollutant emission reduces, NO in flue gas can be made
xdischarge reduce more than 40%, simultaneously use can variation for fuel, and liquid fuel, gaseous fuel can be used also can to use solid fuel.In today of energy-consuming and energy pollution growing tension, the present invention has very considerable development prospect.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of high-temperature oxygen-enriched formula steam injection boiler system.
In figure: 1 is treated softening deaerated water with pressure, and 2 is feed pump, and 3 is blender, and 4 is radiant section, 5 is pipeline I, and 6 is steam-water separator, and 7 is collection header, 8 is blowoff valve, and 9 is saturated vapor outlet, and 10 is pipeline II, 11 is check-valves, and 12 is Fuel inlet pipe, and 13 is burner, 14 is flue, and 15 is regenerative air preheater, and 16 is smoke discharge tube road, 17 is air blast, and 18 is oxygen-enriched inlet pipeline, and 19 is pipeline III.
Below in conjunction with accompanying drawing, the present invention is described in further detail:
As shown in Figure 1, the high-temperature oxygen-enriched formula injection boiler of the present invention comprises body of heater, radiant section 4 and oxygen-enriched air preheating section, described radiant section 4 is arranged on body of heater inner chamber, described oxygen-enriched air preheating section is arranged on outside body of heater, oxygen-enriched air preheating section is regenerative air preheater 15, regenerative air preheater 15 is connected with smoke discharge tube road 16 and oxygen-enriched inlet pipeline 18, and oxygen-enriched inlet pipeline 18 is connected with air blast 17; Boiler also comprises feed pump 2, blender 3, steam-water separator 6, collection header 7 and burner 13; Steam-water separator 6 and collection header 7 are arranged in outside body of heater; Treated softening deaerated water 1 with pressure enters feed pump 2, blender 3 is respectively with feed pump 2, radiant section 4 and collect header 7 and be communicated with, steam-water separator 6 is respectively with radiant section 4 and collect header 7 and be communicated with, and burner 13 is communicated with oxygen-enriched air preheating section with Fuel inlet pipe 12, body of heater respectively.
The Water flow-path of boiler is: treated softening deaerated water 1 with pressure is after feed pump 2 boosts, after entering blender 3 by blender 3 feed-water intake end, the radiant section 4 entering described boiler is heated as saturated moist steam, saturated moist steam enters steam-water separator 6 by pipeline I by the moist steam arrival end of steam-water separator 6 and carries out carbonated drink separation, saturated vapor exports 9 by the saturated vapor at steam-water separator 6 top and flows out, and injects underground recover the oil by corresponding pipeline; Flowed out by the saturation water port of export bottom steam-water separator 6 by the isolated saturation water of steam-water separator 6, collection header 7 is entered by collection header 7 top saturation water arrival end, saturation water flows out by collecting the header 7 saturation water port of export, blender 3 is entered to blender 3 saturation water arrival end, mix with boiler feedwater, improve boiler feed temperature; Collection header 7 bottom blow-down mouth arranges blowoff valve 8, carries out blowdown when inorganic salts reaches finite concentration; Between collection header 7 and blender 3, saturation water pipeline II arranges check-valves 11, flow backwards to prevent saturation water.
The flue gas flow of boiler is: flue gas is successively by after the radiant section 4 of described boiler, regenerative air preheater 15 is flowed into by regenerative air preheater 15 smoke inlet end by flue 14, flowed out by the smoke discharge tube road 16 of regenerative air preheater 15 smoke outlet after self heat being passed to heat storage, temperature can be reduced to 110 ~ 150 DEG C, and the chimney finally by described boiler enters in air.
The oxygen-enriched air flow process of boiler: the oxygen-enriched air produced by methods such as embrane method, separation by deep refrigeration and pressure swing adsorption methods is by after air blast 17 supercharging, regenerative air preheater 15 is entered by regenerative air preheater 15 arrival end by oxygen-enriched inlet pipeline 17, high-temperature oxygen-enriched air is heated as after absorbing the heat of heat storage, air themperature can reach more than 1000 DEG C, flowed out by regenerative air preheater 15 air outlet slit end, finally by burner 13 and fuel mixed combustion in body of heater.
The implementation procedure of high-temperature oxygen-enriched combustion technology: the oxygen-enriched air produced by methods such as embrane method, separation by deep refrigeration and pressure swing adsorption methods enters regenerative air preheater, is heated and becomes high-temperature oxygen-enriched air.When high-temperature flue gas flows through heat storage, the continuous rotation by heat storage after transferring heat to heat storage transfers heat to oxygen-enriched air again, thus reaches the object of preheating oxygen-enriched air.So constantly circulation, can realize, to the without interruption high-temperature oxygen-enriched air in injection boiler, ensure that the stability of furnace flame, thus inner operating not easily being fluctuated.
HTAC and oxygen-enriched combustion technology combine by the present invention, form high-temperature oxygen-enriched burning, and combustion adjuvant adopts oxygen-enriched air; High-temperature oxygen-enriched air is produced by regenerative air preheater, and utilize the rotation of heat storage to realize the heat exchange of high-temperature flue gas and oxygen-enriched air, oxygen-enriched air sends into burner after being heated to be high-temperature oxygen-enriched air, carries out mixed combustion with fuel, realizes high-temperature oxygen-enriched burning.Save existing injection boiler convection section and give water-to-water heat exchanger, set up superheat section and oxygen-enriched air preheating section.Can realize, to the high temperature air without interruption in injection boiler, ensure that the stability of furnace flame, thus inner operating not easily being fluctuated, compensate for the deficiency of suitching type Regenerative Combustion System.Meanwhile, blender realizes being mixed with the direct of boiler feedwater by the isolated saturation water of steam-water separator, improves the temperature of boiler feedwater.In addition, the variation of the present invention's application fuel, both can be applied on fuel oil, gas steam injection boiler, also can be applicable in Steam-injection Boiler Burning Pulverized Coal.The present invention reduces the temperature difference of different parts, keeps the temperature in stove as far as possible even, reduces corrosion.
Oxygen-enriched air preheating section of the present invention is also applicable to regular air preheating section; namely; combustion adjuvant of the present invention adopts oxygen-enriched air; also can be other combustion adjuvants such as air; the above know-why being specific embodiments of the invention and using; any based on the equivalent transformation on technical solution of the present invention basis, all belong within protection scope of the present invention.
Claims (8)
1. a high-temperature oxygen-enriched formula injection boiler, it is characterized in that comprising body of heater, radiant section and oxygen-enriched air preheating section, described radiant section is arranged on body of heater inner chamber, and described oxygen-enriched air preheating section is arranged on outside body of heater; Boiler also comprises feed pump, blender, steam-water separator, collection header and burner; Blender is respectively with feed pump, radiant section and collect header and be communicated with, and steam-water separator is respectively with radiant section and collect header and be communicated with, and burner is communicated with oxygen-enriched air preheating section with body of heater respectively.
2. the high-temperature oxygen-enriched formula injection boiler of one according to claim 1, is characterized in that described oxygen-enriched air preheating section is regenerative air preheater.
3. the high-temperature oxygen-enriched formula injection boiler of one according to claim 2, is characterized in that described regenerative air preheater is connected with air blast by oxygen-enriched inlet pipeline.
4. the high-temperature oxygen-enriched formula injection boiler of one according to claim 2, is characterized in that described regenerative air preheater is connected with smoke discharge tube road.
5. the high-temperature oxygen-enriched formula injection boiler of one according to claim 1, is characterized in that described steam-water separator and collection header are arranged in outside body of heater.
6. the high-temperature oxygen-enriched formula injection boiler of one according to claim 1, is characterized in that described collection header is connected with blowoff valve.
7. the high-temperature oxygen-enriched formula injection boiler of one according to claim 1, is characterized in that, between described collection header and blender, saturation water pipeline II is provided with check-valves.
8. the high-temperature oxygen-enriched formula injection boiler of one according to claim 1, is characterized in that the combustion adjuvant that described oxygen-enriched air preheating section adopts is oxygen-enriched air or regular air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510756257.4A CN105423333A (en) | 2015-11-10 | 2015-11-10 | High-temperature oxygen-enrichment type steam-injection boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510756257.4A CN105423333A (en) | 2015-11-10 | 2015-11-10 | High-temperature oxygen-enrichment type steam-injection boiler |
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| CN105423333A true CN105423333A (en) | 2016-03-23 |
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|---|---|---|---|
| CN201510756257.4A Pending CN105423333A (en) | 2015-11-10 | 2015-11-10 | High-temperature oxygen-enrichment type steam-injection boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705108A (en) * | 2016-12-29 | 2017-05-24 | 辽宁石油化工大学 | High-temperature flue gas oxygen-doped type oxygen-enriched combustion steam-injection boiler |
| CN106705109A (en) * | 2016-12-29 | 2017-05-24 | 辽宁石油化工大学 | High-temperature flue gas oxygen-doped type superheated steam injection boiler |
| CN108072027A (en) * | 2016-11-11 | 2018-05-25 | 中国石油化工股份有限公司抚顺石油化工研究院 | A kind of injection boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108072027A (en) * | 2016-11-11 | 2018-05-25 | 中国石油化工股份有限公司抚顺石油化工研究院 | A kind of injection boiler |
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Application publication date: 20160323 |