CN202253722U - High oxygen enrichment combustion-supporting and energy-saving device for reducing generation of NOx - Google Patents
High oxygen enrichment combustion-supporting and energy-saving device for reducing generation of NOx Download PDFInfo
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- CN202253722U CN202253722U CN2011203885564U CN201120388556U CN202253722U CN 202253722 U CN202253722 U CN 202253722U CN 2011203885564 U CN2011203885564 U CN 2011203885564U CN 201120388556 U CN201120388556 U CN 201120388556U CN 202253722 U CN202253722 U CN 202253722U
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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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- 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
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Abstract
A high oxygen enrichment combustion-supporting and energy-saving device for reducing the generation of NOx includes a front pretreatment unit used for pressuring and drying the air and providing stable air flow through a buffer tank, a pressure swing adsorption oxygen generation unit connected with the front pretreatment unit and used for separating oxygen in the air, removing nitrogen and obtaining the oxygen enrichment, a rear pretreatment unit connected with the pressure swing adsorption oxygen generation unit, and used for performing pressuring, drying, oil removing and dedusting for the oxygen enrichment for the second time, and heating the oxygen enrichment to reach a steady temperature higher than the dew point, and a membrane separation and purification unit connected with the rear pretreatment unit, and used for performing membrane separation and purification for the compressed and filtered oxygen enrichment, and further removing nitrogen to obtain high oxygen enrichment. The device can control content of nitrogen from the air supply source, keeps the combustion of the oxygen enrichment at a high temperature and greatly reduces the generation quantity of NOx at the same time, has strong applicability to the conventional gas burners, is simple to operate and control, and is effective once being butted normally for air supply and combustion, and the experimental result shows that the concentration of high oxygen enrichment output by the high oxygen enrichment combustion-supporting and energy-saving device is equal to or higher than 98%.
Description
Technical field
The utility model relates to gas fired-boiler energy-conserving and environment-protective technical field, is a kind of high oxygen-enriched combustion-supporting energy saver that nitrogen oxide produces that reduces specifically, mainly is applicable to the centralized high oxygen-enriched air supply of gas fired-boiler.
Background technology
Nitrogen oxide (NOx) is the atmosphere pollution of emphasis control during China 12.
When oxygen concentration＞21%, be called oxygen enrichment, when oxygen concentration >=90%, be called high oxygen enrichment.At present, oxygen-enriched combusting is widely used in industrial process, and energy-saving effect is remarkable.But the NOx that oxygen-enriched combusting produces increases considerably, and is particularly evident in the combustion process that with the natural gas is fuel, and this is because oxygen-enriched combustion-supporting has improved flame temperature, thereby promoted the generation of heating power type NOx (nitrogen oxidation under hot conditions generates in the air).In the combustion of natural gas process of oxygen-enriched combustion-supporting, the NOx main source is the heating power type NOx of high-temperature region, and the generation of therefore controlling heating power type NOx is to reduce the key that gas fired-boiler NOx generates total amount.
To the oxygen-enriched combustion-supporting gas fired-boiler, the low NOx combusting technology of extensive use at present mainly is to realize through reducing approach such as flame temperature, the shortening high-temperature region time of staying, improvement combustion system, like air classification, flue gas recirculation, special burner etc.Though these technology have played positive effect; But just (being up to 50%) reduced NOx generation total amount on the part degree; And it is inconsistent with the characteristics of high-temp combustion to reduce flame temperature, and the speed of control air coefficient and burner ejection simultaneously requires degree high to performance accuracy, so is necessary to develop and a kind ofly need reduce the oxygen enriched flame temperature; Control simply, can reduce the new method or the new equipment of gas fired-boiler NOx discharging simultaneously by a larger margin.
The utility model content
In order to address the deficiencies of the prior art, the utility model embodiment provides a kind of high oxygen-enriched combustion-supporting energy saver that nitrogen oxide produces that reduces, and this device is through reducing the discharge capacity that nitrogen content reduces NOx from the source.
To achieve these goals, the utility model embodiment provides a kind of high oxygen-enriched combustion-supporting energy saver that nitrogen oxide produces that reduces, and said device comprises: preceding pretreatment unit, to air pressurize, drying, and stable air stream is provided through surge tank; The omnibus control system unit connects said preceding pretreatment unit, separates said airborne oxygen and remove nitrogen obtaining oxygen enrichment; Back pretreatment unit connects said omnibus control system unit, to said oxygen enrichment pressurize once more, dry, oil removing dedusting, and be heated above the steady temperature of dew point; Film separates purifier units, connects said back pretreatment unit, and the oxygen enrichment after compression is filtered carries out film to be separated and purify further that removal nitrogen obtains high oxygen enrichment.
Pretreatment unit comprises before said: air compressor, cooling driers and air cushioning jar; Said air compressor connects said cooling driers, and said cooling driers connects said air cushioning jar.
Said omnibus control system unit comprises: absorber and oxygen surge tank; Said absorber, connect said oxygen surge tank and said before the air cushioning jar of pretreatment unit, separate said airborne oxygen and remove nitrogen obtaining oxygen enrichment; A branch of said oxygen surge tank directly exports said oxygen enrichment through an outlet valve, and another branch is pretreatment unit after inlet valve connection is said.
Said omnibus control system unit also comprises: intake valve, connect said before the air cushioning jar and the said absorber of pretreatment unit, be said absorber input air raw material; Air bleeding valve connects said absorber, discharges the nitrogenous tail gas after said absorber is handled; Air outlet valve connects said back pretreatment unit through an one-way inlet valve, and output is through the isolated oxygen enrichment of said absorber; Flushing valve connects said absorber, and said absorber is all pressed and washed.
Said absorber is a plurality of.
Said absorber is an AB carbon molecular sieve absorber.
Said back pretreatment unit comprises: air compressor, cooling driers, filter and electric heater; Said air compressor connects said cooling driers, and said cooling driers connects said filter, and said filter connects said electric heater, and said electric heater connects said film and separates purifier units.
Said film separates purifier units and comprises: membrane separator and oxygen surge tank; Said membrane separator connects the said electric heater of pretreatment unit afterwards, and connects said oxygen surge tank through an inlet valve; Said oxygen surge tank connects gas burner through an outlet valve.
Said membrane separator is a hollow fiber membrane separator.
The high oxygen-enriched combustion-supporting energy saver that reduction nitrogen oxide that the utility model embodiment provides produces, control nitrogen content from the air feed source (surpasses 90%) and reduces the generation of NOx significantly when keeping oxygen-enriched combusting high temperature; And this device is strong to the applicability of existing gas burner, controls simply, only needs the normal air feed burning of butt joint to achieve the goal, and tests high oxygen concentration >=98% of its output of proof.
Description of drawings
Fig. 1 is the overall structure figure of the utility model embodiment device;
Fig. 2 is the refined structure figure of the utility model embodiment device.
The specific embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment clearer; To combine the accompanying drawing among the utility model embodiment below; Technical scheme among the utility model embodiment is carried out clear, intactly description; Obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
To the oxygen-enriched combustion-supporting gas fired-boiler, the utility model provides a kind of high oxygen enrichment (oxygen concentration >=98%) combustion-supporting and energy-saving device, from air feed source control nitrogen content, when keeping oxygen-enriched combusting high temperature, (surpasses 90%) significantly and reduce the generation of NOx; And this device is strong to the applicability of existing gas burner, controls simply, only needs the normal air feed burning of butt joint to achieve the goal.
Fig. 1 is the overall structure figure of the utility model embodiment device.As shown in Figure 1, this device comprises: preceding pretreatment unit 100, omnibus control system unit 200, back pretreatment unit 300 and film separate purifier units 400.As shown in Figure 1, preceding pretreatment unit 100, omnibus control system unit 200, back pretreatment unit 300 and film separate purifier units 400 and connect successively.
Particularly, preceding pretreatment unit 100, to air pressurize, drying, and stable air stream is provided through surge tank; Omnibus control system unit 200, pretreatment unit 100 before connecting, the oxygen in the separation of air is also removed nitrogen and is obtained oxygen enrichment (concentration about 94% in the utility model); Back pretreatment unit 300 connects omnibus control system unit 200, to oxygen enrichment pressurize once more, dry, oil removing dedusting, and be heated above the steady temperature of dew point; Film separates purifier units 400, connects back pretreatment unit 300, and the oxygen enrichment after compression is filtered carries out film to be separated to purify and further remove nitrogen and obtain high oxygen enrichment (in the utility model oxygen content reach >=98%).
Fig. 2 is the refined structure graph structure figure of the utility model embodiment device.As shown in Figure 2:
Preceding pretreatment unit 100 comprises: air compressor 1, cooling driers 2 and air cushioning jar 3; Air compressor 1 connects cooling driers 2, and cooling driers 2 connects air cushioning jar 3; Connect omnibus control system unit 200 behind the air cushioning jar 3.Air compressor 1 is used for air is compressed, and cooling driers 2 is used for the air after the compression is carried out cool drying, and air cushioning jar 3 is used for to omnibus control system unit 200 stable air stream being provided.
Omnibus control system unit 200 comprises: absorber 4 and oxygen surge tank 13; Absorber 4 connects the air cushioning jar 3 of oxygen surge tank 13 and preceding pretreatment unit 100, and the oxygen in the separation of air is also removed nitrogen and obtained oxygen enrichment; A branch of oxygen surge tank 13 directly exports oxygen enrichment through an outlet valve 14, and another branch is pretreatment unit 300 after an inlet valve 15 connects.Alternatively, this absorber 4 can be an AB carbon molecular sieve absorber.
Particularly, absorber 4 can be for a plurality of, and Fig. 2 is that example describes with 2 absorbers, can also be other quantity as required in the practical application.
As shown in Figure 2, corresponding to the situation of 2 absorbers, omnibus control system unit 200 also comprises: 2 intake valves 5,8, and the air cushioning jar 3 and absorber 4 of pretreatment unit 100 are absorber 4 input air raw materials before connecting; 2 air bleeding valves 6,7 connect absorber 4, discharge the nitrogenous tail gas after absorber 4 is handled; Air outlet valve 9,11 connects back pretreatment unit 300 through an one-way inlet valve 12, and output is through absorber 4 isolated oxygen enrichments; Flushing valve 10 connects absorber 4, and absorber 4 is all pressed and washed.
Film separates purifier units 400 and comprises: membrane separator 20 and oxygen surge tank 22; Membrane separator 20 connects the electric heater 19 of back pretreatment unit 300, and passes through an inlet valve 21 connection oxygen surge tanks 22; Oxygen surge tank 22 connects gas burner, the emptying of non-infiltration tail gas through an outlet valve 23.Alternatively, said membrane separator is a hollow fiber membrane separator.
Below in conjunction with Fig. 2 the operation principle of the utility model embodiment device is described in detail.
Behind 1 pressurization of air process air compressor machine, cooling driers 2 cool dryings, get into absorbers 4 circulation system oxygen through air cushioning jar 3.The effect of surge tank is steady pressure and a flow between air supply source and air intake apparatus, and the oxygen surge tank is that oxygen is cushioned, and the air cushioning jar is that air is cushioned.
Intake valve 5,8, air outlet valve 9,11, flushing valve 10, air bleeding valve 6,7 is the automatic switchover magnetic valve of Programmable Logic Controller PLC (Programmable Logic Controller, Programmable Logic Controller) control.Intake valve 5,8 input air raw materials, the oxygen of air outlet valve 9,11 outputs 94%, the nitrogenous tail gas that air bleeding valve 6,7 is discharged after resolving, the effect of flushing valve 10 is all to press and clean carbon molecular sieve.Absorber 4 isolated oxygen enrichments get into oxygen surge tank 13 through inlet one-way valve 12, and the nitrogenous tail gas after the parsing is discharged through air bleeding valve 6,7, and the oxygen concentration in the oxygen surge tank 13 is about 94%.
In order to reach omnibus control system unit 200 separates purifier units 400 with film optimum Match effect; Need to regulate by adsorption oxygen-preparation unit 200 and get into film separation purifier units 400 air capacities; At this moment can open outlet valve 14 and regulate, simultaneously the film in the membrane separator 20 played a protective role.Therefore, can directly to the user who satisfies its requirement high oxygen enrichment be provided through outlet valve 14 here, this air feed branch road can reach simultaneously regulates subsequent film separation purifier units air inflow, safing purpose.
Another branch road that oxygen surge tank 13 gas outlets connect is pretreatment unit 300 after inlet valve 15 gets into, and oxygen enrichment is through air compressor machine 16 pressurizations, and cooling driers 17 dryings dewater; Filter 18 oil removing dedustings; After electric heater 19 is heated to constant temperature (being higher than dew-point temperature), gets into membrane separator 20 and separate purification, nitrogen is further separated; Oxygen content can reach more than 98%; High oxygen enrichment after the purification gets into oxygen surge tank 22 through one-way inlet valve 21, connects gas burner through outlet valve 23 again, the emptying of the isolated non-infiltration tail gas of membrane separator.
The high oxygen-enriched combustion-supporting energy saver that reduction nitrogen oxide that the utility model embodiment provides produces, control nitrogen content from the air feed source (surpasses 90%) and reduces the generation of NOx significantly when keeping oxygen-enriched combusting high temperature; And this device is strong to the applicability of existing gas burner, controls simply, only needs the normal air feed burning of butt joint to achieve the goal, and tests high oxygen concentration >=98% of its output of proof.
The utility model is compared with present low NOx combusting technology has following advantage:
(1) greatly reduces the NOx discharge capacity.Through actual measuring and calculating, the NOx discharge capacity can reduce more than 90%.
(2) the oxygenerator oxygen recovery rate reaches 10%.
(3) energy-saving and cost-reducing, the thermal efficiency is high.Under the identical thermal efficiency condition, the fuel gas buring amount is saved 60-70%; The hot properties that has kept oxygen enriched flame, burner burner temperature significantly improves, and has improved the thermal efficiency of gas fired-boiler.
(4) this feeder has been simplified low NOx combusting technology and equipment, and applicability is wide.
Above embodiment is only in order to the technical scheme of explanation the utility model embodiment, but not to its restriction; Although the utility model embodiment has been carried out detailed explanation with reference to previous embodiment; Those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of each embodiment technical scheme of essence disengaging the utility model embodiment of relevant art scheme.
Claims (9)
1. one kind is reduced the high oxygen-enriched combustion-supporting energy saver that nitrogen oxide produces, and it is characterized in that said device comprises:
Before pretreatment unit, to air pressurize, drying, and stable air stream is provided through surge tank;
The omnibus control system unit connects said preceding pretreatment unit, separates said airborne oxygen and remove nitrogen obtaining oxygen enrichment;
Back pretreatment unit connects said omnibus control system unit, to said oxygen enrichment pressurize once more, dry, oil removing dedusting, and be heated above the steady temperature of dew point;
Film separates purifier units, connects said back pretreatment unit, and the oxygen enrichment after compression is filtered carries out film to be separated and purify further that removal nitrogen obtains high oxygen enrichment.
2. the high oxygen-enriched combustion-supporting energy saver that reduction nitrogen oxide according to claim 1 produces is characterized in that, said preceding pretreatment unit comprises: air compressor, cooling driers and air cushioning jar;
Said air compressor connects said cooling driers, and said cooling driers connects said air cushioning jar.
3. the high oxygen-enriched combustion-supporting energy saver that reduction nitrogen oxide according to claim 1 produces is characterized in that said omnibus control system unit comprises: absorber and oxygen surge tank;
Said absorber, connect said oxygen surge tank and said before the air cushioning jar of pretreatment unit, separate said airborne oxygen and remove nitrogen obtaining oxygen enrichment;
A branch of said oxygen surge tank directly exports said oxygen enrichment through an outlet valve, and another branch is pretreatment unit after inlet valve connection is said.
4. the high oxygen-enriched combustion-supporting energy saver that reduction nitrogen oxide according to claim 3 produces is characterized in that said omnibus control system unit also comprises:
Intake valve, connect said before the air cushioning jar and the said absorber of pretreatment unit, be said absorber input air raw material;
Air bleeding valve connects said absorber, discharges the nitrogenous tail gas after said absorber is handled;
Air outlet valve connects said back pretreatment unit through an one-way inlet valve, and output is through the isolated oxygen enrichment of said adnexa;
Flushing valve connects said absorber, and adsorbed device is all pressed and washed.
5. the high oxygen-enriched combustion-supporting energy saver that reduction nitrogen oxide according to claim 3 produces is characterized in that said absorber is a plurality of.
6. the high oxygen-enriched combustion-supporting energy saver that reduction nitrogen oxide according to claim 3 produces is characterized in that said absorber is an AB carbon molecular sieve absorber.
7. the high oxygen-enriched combustion-supporting energy saver that reduction nitrogen oxide according to claim 1 produces is characterized in that, said back pretreatment unit comprises: air compressor, cooling driers, filter and electric heater;
Said air compressor connects said cooling driers, and said cooling driers connects said filter, and said filter connects said electric heater, and said electric heater connects said film and separates purifier units.
8. the high oxygen-enriched combustion-supporting energy saver that reduction nitrogen oxide according to claim 1 produces is characterized in that, said film separates purifier units and comprises: membrane separator and oxygen surge tank;
Said membrane separator connects the said electric heater of pretreatment unit afterwards, and connects said oxygen surge tank through an inlet valve;
Said oxygen surge tank connects gas burner through an outlet valve.
9. the high oxygen-enriched combustion-supporting energy saver that reduction nitrogen oxide according to claim 8 produces is characterized in that said membrane separator is a hollow fiber membrane separator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203885564U CN202253722U (en) | 2011-10-13 | 2011-10-13 | High oxygen enrichment combustion-supporting and energy-saving device for reducing generation of NOx |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011203885564U CN202253722U (en) | 2011-10-13 | 2011-10-13 | High oxygen enrichment combustion-supporting and energy-saving device for reducing generation of NOx |
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| CN202253722U true CN202253722U (en) | 2012-05-30 |
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| CN2011203885564U Expired - Fee Related CN202253722U (en) | 2011-10-13 | 2011-10-13 | High oxygen enrichment combustion-supporting and energy-saving device for reducing generation of NOx |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111377537A (en) * | 2020-01-07 | 2020-07-07 | 三峡大学 | Device and method for accelerating denitrification efficiency of water body |
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2011
- 2011-10-13 CN CN2011203885564U patent/CN202253722U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111377537A (en) * | 2020-01-07 | 2020-07-07 | 三峡大学 | Device and method for accelerating denitrification efficiency of water body |
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Granted publication date: 20120530 Termination date: 20201013 |
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| CF01 | Termination of patent right due to non-payment of annual fee |