CN2553259Y - Oxygen-enriched secondry blast device for boiler - Google Patents
Oxygen-enriched secondry blast device for boiler Download PDFInfo
- Publication number
- CN2553259Y CN2553259Y CN02274215U CN02274215U CN2553259Y CN 2553259 Y CN2553259 Y CN 2553259Y CN 02274215 U CN02274215 U CN 02274215U CN 02274215 U CN02274215 U CN 02274215U CN 2553259 Y CN2553259 Y CN 2553259Y
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- China
- Prior art keywords
- air
- oxygen
- boiler
- overfire air
- overfire
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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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 utility model relates to a secondary air device for boilers, in particular to an oxygen-enriched secondary air device with the oxygen content of 30 to 40% in the secondary air. The utility model adopts the technical proposal that an outlet of an air filter connected with an air duct is connected with an oxygen-enriched air generator and an air storage tank via a ventilator; an output port of the air storage tank is connected with a secondary air nozzle via a secondary fan and a secondary air duct. The utility model has the advantages that overall amount of air entering into the boiler is decreased when the device is put into operation; excess air coefficient of the boiler is greatly reduced; furnace temperature is increased; combustion condition is stable; carbon content of boiler ash is greatly decreased; discharge of smoke, dust and nitrogen oxides compound is reduced; the thermal efficiency is increased by 5% to 10%.
Description
Technical field
The utility model relates to a kind of boiler overfire air device, and specifically a kind of secondary wind is that oxygen content reaches 30～40% boiler oxygen enrichment overfire air device.
Background technology
At present, the Industrial Boiler of China is based on fire coal, and the output of coal-fired industry stove and use amount all account for international the first, and the coal-fired consumption of annual Industrial Boiler accounts for about 1/3 of China's raw coal output.Bulging air inducing technology commonly used causes the Industrial Boiler thermal efficiency low, and the combustible burning is insufficient.This is the insurmountable problem of present routine techniques, and this has just brought energy waste and contaminated environment two big worn-out diseases.
The utility model content
The purpose of this utility model is the deficiency at above-mentioned existence, and a kind of boiler thermal output that improves is provided, and makes the more sufficient combustion-supporting overfire air device of boiler oil burning.
Secondary wind is the strong air flow of sending into burner hearth from the grate top with the pressure form, and it mainly acts on is the disturbance gas stream in the stove, strengthens mutual mixing, reduces q3 and q4 heat loss under the situation that does not increase excess air coefficient; Favorably situated secondary wind can help to ignite the coal seam with the high-temperature flue gas leader tape in the stove to fire grate front end; Utilize secondary wind to blowing, the vortex motion that can organize flue gas can prolong and flies the time of staying of coal in burner hearth, and can make again that part flies coal, flying dust falls back on the fire grate, helps smoke abatement and dust control, reduces carry-over loss; Can make flue gas by desired path flows, thereby reach the prolong smoke flow process, improve the purposes such as degree of filling, control combustion centre position of gas stream in the stove.
The technical scheme that is adopted is, the air cleaner outlet that links to each other with ventilating duct is connected to oxygen-enriched generator and air accumulator through ventilation blower, and the output port of air accumulator send overfire air jet by overfire air fan and secondary air duct.Air enters the air cleaner that is attached thereto through ventilating duct under the effect of ventilation blower; Ventilation blower is with after filtered air has been sent into oxygen-enriched generator, and methods such as oxygen-enriched generator employing transformation absorption are divided into two kinds of gases with air: a kind of Poor oxygen gas is discharged from, and a kind of oxygen rich gas is sent to air accumulator; Overfire air fan is sent into the oxygen rich gas in the air accumulator and is participated in burning in the boiler furnace by secondary air duct, overfire air jet.
Use the oxygen enrichment overfire air device, can make the thermal efficiency of boiler improve 5%～10%, this technology is applicable to various types of Industrial Boilers, this technology can not only be a large amount of energy savings, cut the waste, but also, efforts at environmental protection are also had very great help to reduce dust and discharge of harmful gases concentration.Whole device enters boiler when putting into operation overall tolerance has reduced, and the excess air coefficient of boiler obviously reduces, and fire box temperature improves, stable combustion condition, and the ash content carbon of boiler obviously reduces, and the discharge capacity of flue dust and oxynitrides reduces.
Description of drawings
Accompanying drawing is a connection diagram of the present utility model.
The specific embodiment
In this device is installed between the subsidiary engine of boiler.Earlier with air cleaner, ventilation blower, oxygen-enriched generator, air accumulator, overfire air fan etc. give by construction drawing lay a solid foundation after having stayed the installation site, in place, fixing.The outlet that outdoor ventilating duct (1) is received in import is connected the inlet of air cleaner (2); The outlet of filter (2) links to each other with the air channel with the inlet of ventilation blower (3); The outlet of ventilation blower (3) links to each other with the air channel equally with the inlet of oxygen-enriched generator (4); The oxygen rich gas outlet of oxygen-enriched generator (4) links to each other with the inlet of air accumulator (5) with the air channel; The outlet of air accumulator (5) is connected with the air channel equally with the inlet of overfire air fan (6); The outlet of overfire air fan (6) is connected with the inlet of secondary air duct (7); The port of export of secondary air duct (7) links to each other with the overfire air jet that is arranged in boiler setting.
The electric-control system of whole device is located in the control room of boiler room.The ventilation blower that blast is low, ventilation is big (3) is finished the inlet suck air of the ventilating duct (1) outside the boiler room, enters air cleaner (2) and enters ventilation blower (3) and send in the oxygen enrichment generating means (4) through filtered air.The air separation that will enter oxygen-enriched generator (4) through the method for transformation absorption in oxygen-enriched generator (4) becomes two kinds of gases, a kind ofly directly discharges for Poor oxygen gas, and another kind enters air accumulator (5) for oxygen rich gas under the effect of overfire air fan (6).The effect of air accumulator is steady air flow and steady pressure, and is even, stable with the gas of guaranteeing the suction of secondary wind and providing.Overfire air fan (6) is the high wind pressure type blower fan of little air quantity, and its assurance is the air-flow of 3000～5000Pa pressure head through the oxygen rich gas that overfire air port (8) enters boiler (B).The ratio of the ventilation of ventilation blower (3) and overfire air fan (6) is 4: 1～5: 1 generally speaking, has so just guaranteed through the oxygen content that accounts for boiler (B) total blast volume about 10% that the isolated oxygen rich gas of oxygen-enriched generator (4) can satisfy the boiler needs fully to be 30～40% oxygen rich gas.
The medium of common secondary wind work generally is an air, also has part to use steam or flue gas.Though can improve the combustion position of boiler to a certain extent, desirable not to the utmost also.The boiler oxygen enrichment overfire air device that the utility model proposed will solve common secondary wind the difficult problem that can't overcome.Make that secondary wind technology is more perfect, more practical.Air (A) enters the air cleaner (2) that is attached thereto through ventilating duct (1) under the use of ventilation blower (3); Ventilation blower (3) is with after filtered air has been sent into oxygen-enriched generator (4), and methods such as oxygen-enriched generator (4) employing transformation absorption are divided into two kinds of gases with air: a kind of Poor oxygen gas is discharged from, and a kind of oxygen rich gas is sent to air accumulator (5); Overfire air fan (6) is sent into the oxygen rich gas in the air accumulator and is participated in burning in the boiler furnace by secondary air duct, overfire air jet.Overfire air jet (8) correspondence is connected to boiler (B) burner hearth, and secondary wind is the oxygen rich gas of oxygen content 30～40%.The blast that is entered the oxygen rich gas of burner hearth by overfire air fan (6) process secondary air duct (7) and overfire air jet (8) is 3000～5000Pa.The position that overfire air jet (8) is arranged is positioned at boiler furnace both walls or front-back wall place.Can realize: one, oxygen concentration increases and to help burning and burn in the gas, makes flying dust and fly carbon in the coal and combustible such as fugitive constituent burns fully under the wind action of oxygen enrichment secondary, and can make the part flying dust, fly coal and fall back on the fire grate, helps smoke abatement and dust control; Two, the flame temperature that forms of the oxygen of high concentration and the turbulence of inner flue gas of the stove strong convection obviously increases, and fire box temperature has increased, and high-temperature flue gas has increased the radiant heat in coal seam, helps igniting and the improvement of whole burner hearth combustion conditions of new coal; Three, the total air that enters in the burner hearth has tailed off, the air quantity of general secondary wind accounts for about 20% of total blast volume, and the secondary air flow that we give when using oxygen enrichment secondary wind only is about 10% of total blast volume, the total air quantity that enters burner hearth like this reduces, so reduce heat loss due to exhaust gas, reduced the discharging of oxynitrides.
Claims (4)
1. boiler oxygen enrichment overfire air device, have blower fan and nozzle, it is characterized in that air cleaner (2) outlet that links to each other with ventilating duct (1) is connected to oxygen-enriched generator (4) and air accumulator (5) through ventilation blower (3), the output port of air accumulator send overfire air jet (8) by overfire air fan (6) and secondary air duct (7).
2. according to the described boiler oxygen enrichment of claim 1 overfire air device, it is characterized in that overfire air jet (8) correspondence is connected to boiler (B) burner hearth, secondary wind is the oxygen rich gas of oxygen content 30～40%.
3. according to the described boiler oxygen enrichment of claim 1 overfire air device, it is characterized in that be 3000～5000Pa by overfire air fan (6) through the blast that secondary air duct (7) and overfire air jet (8) enter the oxygen rich gas of burner hearth.
4. according to the described boiler oxygen enrichment of claim 1 overfire air device, it is characterized in that the position that overfire air jet (8) is arranged is positioned at boiler furnace both walls or front-back wall place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02274215U CN2553259Y (en) | 2002-07-17 | 2002-07-17 | Oxygen-enriched secondry blast device for boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02274215U CN2553259Y (en) | 2002-07-17 | 2002-07-17 | Oxygen-enriched secondry blast device for boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2553259Y true CN2553259Y (en) | 2003-05-28 |
Family
ID=33738517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02274215U Expired - Fee Related CN2553259Y (en) | 2002-07-17 | 2002-07-17 | Oxygen-enriched secondry blast device for boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2553259Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927566A (en) * | 2012-11-15 | 2013-02-13 | 辽宁省电力有限公司电力科学研究院 | Correcting method for secondary air quantity curve of conventional boiler after local oxygen-enriched combustion transformation |
| CN108534169A (en) * | 2018-04-11 | 2018-09-14 | 江苏华飞宇节能技术有限公司 | A kind of integrating device for oxygen enriching burning-aid |
-
2002
- 2002-07-17 CN CN02274215U patent/CN2553259Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927566A (en) * | 2012-11-15 | 2013-02-13 | 辽宁省电力有限公司电力科学研究院 | Correcting method for secondary air quantity curve of conventional boiler after local oxygen-enriched combustion transformation |
| CN108534169A (en) * | 2018-04-11 | 2018-09-14 | 江苏华飞宇节能技术有限公司 | A kind of integrating device for oxygen enriching burning-aid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |