CN101694297A - Forced-draft burner and method for regularizing side-combustion high-temperature preheated air of square-box furnace - Google Patents

Forced-draft burner and method for regularizing side-combustion high-temperature preheated air of square-box furnace Download PDF

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Publication number
CN101694297A
CN101694297A CN200910066235A CN200910066235A CN101694297A CN 101694297 A CN101694297 A CN 101694297A CN 200910066235 A CN200910066235 A CN 200910066235A CN 200910066235 A CN200910066235 A CN 200910066235A CN 101694297 A CN101694297 A CN 101694297A
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CN
China
Prior art keywords
combustion
gas
burner
air
temperature
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Application number
CN200910066235A
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Chinese (zh)
Inventor
马晓阳
王伟
邵松
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洛阳瑞昌石油化工设备有限公司
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Priority to CN200910066235A priority Critical patent/CN101694297A/en
Publication of CN101694297A publication Critical patent/CN101694297A/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The invention discloses forced-draft burner and method for regularizing side-combustion high-temperature preheated air of a square-box furnace. The burner is provided with two independent grades of gas wheels; a main gas gun 3 is arranged in the center of the burner and the gas blower of the gas gun is communicated with a combustion channel consisting of flam path bricks 1, that is to say, the gas blower of the gas gun is communicated with a primary combustion area; a combustion air channel is communicated with the center of the burner; and an air adjustment butterfly vale 8 is arranged for controlling the quantity of combustion air; all combustion air enters the burner via the combustion air channel and is mixed with the gas blown out of the main gas gun 3 for combustion together in the combustion channel consisting of the flame path bricks 1; a second-level gas distribution ring 4 is arranged and communicated with a second-level gas source; and a plurality of second-level gas guns 10 are arranged on the second-level gas distribution ring 4 and around the outer wall of the flame bricks of the burner. By adopting graded combustion and flue backflow technologies, the invention can reduce the generation of nitric oxides and has the advantages of full combustion, energy saving, environmental protection and high efficiency.

Description

A kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner and method
Technical field
The invention belongs to petrochemical industry reformation square chest stove technical field, relate to a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner and method.
Background technology
At present, along with the raising of national environmental protection laws and regulations requirement and growing to the demand of clean fuel, the status of continuous reformer in oil plant becomes even more important. and heating furnace is one of nucleus equipment in the reformer, burner is again the crucial energy supply equipment of heating furnace, and its performance quality directly influences distribution and the transmission of heat in stove.Therefore, require the performance of burner can not only satisfy the requirement that heat demand also will satisfy the energy-saving and emission-reduction aspect.Tradition reformer burner generally adopts the nature air feed, because the temperature of combustion air is low, pressure is low, has caused the chemistry of fuel incomplete combustion loss bigger, system's efficiency of utilization is low.The hot flue gas of furnace stack outlet does not make full use of, and the heat of the relatively low thermal source of the some other temperature in refinery does not make full use of in addition, causes sizable energy waste.
Summary of the invention
For overcoming the deficiencies in the prior art, the invention provides a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner.Can in combustion process, reduce the generation of nitrogen oxide, make it have sufficient combustion, energy-saving and environmental protection, characteristics of high efficiency.
For achieving the above object, the present invention adopts following technical scheme:
A kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner, described burner is provided with independently gas wheel of two-stage, promptly be provided with main gas gun and be located at the burner center, its ejiction opening is communicated with the fire trough that the quirk brick constitutes, promptly be communicated with primary combustion zone, be communicated with the combustion air passage with the burner center, and be provided with the accent wind butterfly valve of regulating combustion air inlet size; Combustion air by the combustion air passage all enter burner and with gas mixed combustion in the fire trough that the quirk brick constitutes by the ejection of main gas gun; Be provided with secondary gas and distribute ring and it is communicated with secondary gas source, on the secondary gas distribution ring a plurality of secondary gas guns are set and the secondary gas gun is arranged around the quirk brick outer wall of burner.
Described a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner, main gas gun are connected with altar lamp on the base plate that a section of gas source is fixed in burner shell.
Described a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner, main gas gun is fixed in the upper and lower side of burner shell by the gas gun sleeve pipe, and main gas gun head is provided with stable flame cover.
Described a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner is provided with heat-insulation layer in the burner shell plate, and base plate is provided with peephole.
Described a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner, secondary gas gun head are positioned at inclined-plane, quirk brick outer root; The secondary gas gun is connected secondary gas by flange and distributes on the ring and can dismantle separately.
Described a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner, fire trough is made of the quirk brick, and the quirk brick is higher than body of heater above the outer.
A kind of method of work of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner adopts fractional combustion and smoke backflow recirculating process; By set two-stage independence gas gun fuel is divided into two parts and enters burner, and gone in two combustion zones by injection respectively, be primary combustion zone, secondary firing district, independently finish burning in the combustion zone at two, burning was finished two stages, and the flame temperature of arbitrary combustion phases can be near the temperature in the normal burner; In primary combustion zone, part of fuel and whole combustion air enter primary combustion zone, and the burning of primary fuel is finished in satisfying whole fuel combustion required airs, makes excessive air reduce flame temperature; Fuel in the introducing secondary firing district and surplus air mixed combustion from primary combustion zone, the heat of combustion flame outer rim continues to transmit towards periphery by heat radiation, thus, the flame temperature in the two-stage combustion district temperature in the burner that can not be near the mark, a gas part that is burner is entered by the gas gun that main gas gun promptly is positioned at the burner center, spray into the fire trough that the quirk brick constitutes with bigger spray angle, gas jet and combustion-supporting air flow form certain interspersed angle, fully contact mixed combustion with excessive combustion air; Utilize excessive combustion air, make the ignition temperature in the quirk brick be lower than the normal burner temperature, suppress the generation of thermodynamics Nox; It is the secondary firing district in primary combustion zone downstream and surplus air mixed combustion from primary combustion zone that a plurality of secondary gas guns that another part gas of burner encloses quirk brick outer wall by ring enter and spray into along inclined-plane, quirk brick outer quirk brick center, high speed gas jet by the injection of secondary gas gun, make place, burner quirk brick outer form stronger negative pressuren zone, the flue gas that environment temperature is lower in the stove is under the effect of this negative pressure, fill negative pressuren zone fast, entering the secondary firing district mixes with secondary firing district flue gas, and the flue gas recirculation of mixing is incorporated into participates in burning in the high speed gas combustion gas, the flue gas cooling flame of inertia, reduce partial pressure of oxygen, and to reduce discharged nitrous oxides be outside flue gas recirculation and inner flue gas recirculation, and the generation of Nox is further reduced.
Because adopt aforesaid technical scheme, the present invention has following superiority:
Burner of the present invention burns the reformer burner with common side to be compared, and burner flame maximum temperature of the present invention can reduce about 120 ℃, and the NOx growing amount can reduce 55%--60%.Burner of the present invention limits the NOx product by the temperature of restriction combustion zone.The burner of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner grade separation fuel should range low-NOx combustor.Be a kind of, and efficient, the energy-saving and environmental protection of adopting that fuel staging and smoke backflow technology reduce that nitrogen oxide generates are in the burner of one in combustion process.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Among the figure: 1, quirk brick, 2, stable flame cover, 3, main gas gun, 4, secondary gas distributes ring, and 5, burner shell, 6, the gas gun sleeve pipe, 7, combustion air passage, 8, transfer the wind butterfly valve, 9, peephole, 10, secondary gas gun, 11, secondary gas inlet, 12, altar lamp, 13, heat-insulation layer, 14, main gas inlet, 15, the altar lamp gas inlet.
The specific embodiment
In conjunction with the accompanying drawings embodiments of the invention are illustrated;
As shown in Figure 1, 2, described a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner, have primary combustion system and secondary firing system, the primary combustion system is made of the main gas gun 3 that is positioned at the burner center, main gas gun 3 is fixed in the center of burner shell 5 by gas gun sleeve pipe 6, its head is provided with stable flame cover 2 and is communicated with fire trough, and fire trough is made of quirk brick 1, and the quirk brick is higher than body of heater above 1 outer; Main gas gun 3 other ends are communicated with the gas source by main gas inlet 14; Described secondary firing system is distributed by burner secondary gas that equally distributed a plurality of secondary gas guns 10 constitute on the ring 4, and secondary gas gun 10 rings are trapped among quirk brick 1 outer wall; Secondary gas gun 10 heads are positioned at inclined-plane, quirk brick 1 outer root; Secondary gas gun 10 is connected secondary gas by flange and distributes on the ring 4 and can dismantle separately; One side of described main gas gun 3 is provided with altar lamp 12, and altar lamp one end is concordant with main gas gun 3 heads, and the other end is communicated with altar lamp gas source by altar lamp gas inlet 15 and is fixed on the base plate of burner shell 5; Described burner shell 5 tops are provided with fire trough, and its underpart is communicated with combustion air passage 7, is provided with heat-insulation layer 13 in the burner shell 5, and base plate is provided with peephole 9; Be provided with the accent wind butterfly valve 8 of regulating combustion air inlet size in the combustion air passage 7.
Combustion air passage 7 links to each other with burner shell 5, is provided with heat-insulation layer 13 in the burner shell, and when guaranteeing the high temperature combustion air by burner, the burner outer wall temperature is overtemperature not.The gas of burner is divided into two parts and enters burner respectively, and a route master gas inlet 14 enters main gas gun 3, and the fuel nozzle by center gas gun 3 sprays in the quirk brick with bigger spray angle.Gas jet and combustion-supporting air flow form certain interspersed angle, fully contact mixing, burning with excessive combustion air.Because combustion air is excessive,, has suppressed thermodynamics Nox and generated so the ignition temperature in the quirk brick 1 is low than normal burner.Another road gas enters secondary gas by secondary gas inlet 11 and distributes ring 4, and secondary gas distributes arranges a plurality of secondary gas guns 10 on the ring 4.Gas is by the shower nozzle ejection of secondary gas gun 10, and the gas jet sprays into quirk brick 1 center and center peroxide flue gas mixed combustion along inclined-plane, quirk brick outer.Heated by brazier brick when high speed gas stream sprays along hot inclined-plane, quirk brick outer, make the easier burning of gas.Because secondary gas jet jet velocity is near critical condition, the place forms negative pressuren zone in quirk brick 1 outer, drive the lower flue gas of environment temperature and enter flame zone and participate in burning, the combustion zone temperature of so further reduction, Nox generate to further reducing.Thereby reach purpose of design of the present invention.
The method of work of burner of the present invention, adopted fractional combustion and smoke backflow to reduce the technology that nitrogen oxide generates:
Adopt fractional combustion and smoke backflow recirculating technique, by set two-stage independence gas gun fuel is divided into two parts and enters burner, and gone in two combustion zones by injection respectively, be primary combustion zone, secondary firing district, independently finish burning in the combustion zone at two, burning was finished two stages, and the flame temperature of arbitrary combustion phases can be near the temperature in the normal burner; In primary combustion zone, part of fuel and whole combustion air enter primary combustion zone, and the burning of primary fuel is finished in satisfying whole fuel combustion required airs, makes excessive air reduce flame temperature; Fuel in the introducing secondary firing district and surplus air mixed combustion from primary combustion zone, the heat of combustion flame outer rim continues to transmit towards periphery by heat radiation, thus, the flame temperature in the two-stage combustion district temperature in the burner that can not be near the mark, a gas part that is burner is entered by the gas gun that main gas gun promptly is positioned at the burner center, spray into the quirk brick with bigger spray angle, gas jet and combustion-supporting air flow form certain interspersed angle, fully contact mixed combustion with excessive combustion air; Utilize excessive combustion air, make the ignition temperature in the quirk brick be lower than the normal burner temperature, suppress the generation of thermodynamics Nox; It is the secondary firing district in primary combustion zone downstream and surplus air mixed combustion from primary combustion zone that a plurality of secondary gas guns that another part gas of burner encloses quirk brick outer wall by ring enter and spray into along inclined-plane, quirk brick outer quirk brick center, high speed gas jet by the injection of secondary gas gun, make place, burner quirk brick outer form stronger negative pressuren zone, the flue gas that environment temperature is lower in the stove is under the effect of this negative pressure, fill negative pressuren zone fast, entering the secondary firing district mixes with secondary firing district flue gas, and the flue gas recirculation of mixing is incorporated into participates in burning in the high speed gas combustion gas, the flue gas cooling flame of inertia, reduce partial pressure of oxygen, and to reduce discharged nitrous oxides be outside flue gas recirculation and inner flue gas recirculation, and the generation of Nox is further reduced.

Claims (7)

1. regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner, it is characterized in that: described burner is provided with independently gas wheel of two-stage, promptly be provided with main gas gun (3) and be located at the burner center, its ejiction opening is communicated with the fire trough that quirk brick (1) constitutes, promptly be communicated with primary combustion zone, be communicated with the combustion air passage with the burner center, and be provided with the accent wind butterfly valve (8) of regulating combustion air inlet size; Combustion air by the combustion air passage all enter burner and with gas mixed combustion in the fire trough that quirk brick (1) constitutes by the ejection of main gas gun; Be provided with secondary gas and distribute ring (4) and it is communicated with secondary gas source, on the secondary gas distribution ring (4) a plurality of secondary gas guns (10) are set and the secondary gas gun is arranged around the quirk brick outer wall of burner.
2. a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner according to claim 1 is characterized in that: main gas gun (3) is connected with altar lamp (12) on the base plate that a section of gas source is fixed in burner shell (5).
3. a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner according to claim 1, it is characterized in that: main gas gun (3) is fixed in the upper and lower side of burner shell (5) by gas gun sleeve pipe (6), and main gas gun (3) head is provided with stable flame cover (2).
4. a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner according to claim 1 is characterized in that: be provided with heat-insulation layer (13) in burner shell (5) plate, base plate is provided with peephole (9).
5. a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner according to claim 1 is characterized in that: secondary gas gun (10) head is positioned at quirk brick (1) inclined-plane, outer root; Secondary gas gun (10) is connected secondary gas by flange and distributes on the ring (4) and can dismantle separately.
6. a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner according to claim 1 is characterized in that: fire trough is made of quirk brick (1), and quirk brick (1) is higher than body of heater above the outer.
7. the method for work of the described a kind of regularizing side-combustion high-temperature preheated air of square-box furnace forced-draft burner of claim 1, adopted fractional combustion and smoke backflow to reduce the technology that nitrogen oxide generates, by set two-stage independence gas gun fuel is divided into two parts and enters burner, and gone in two combustion zones by injection respectively, be primary combustion zone, secondary firing district, independently finish burning in the combustion zone at two, burning was finished two stages, and the flame temperature of arbitrary combustion phases can be near the temperature in the normal burner; In primary combustion zone, part of fuel and whole combustion air enter primary combustion zone; The burning of primary fuel is finished in satisfying whole fuel combustion required airs, make excessive air reduce flame temperature, fuel in the introducing secondary firing district and surplus air mixed combustion from primary combustion zone, the heat of combustion flame outer rim continues to transmit towards periphery by heat radiation, thus, the flame temperature in the two-stage combustion district temperature in the burner that can not be near the mark, a gas part that is burner is entered by the gas gun that main gas gun promptly is positioned at the burner center, spray into the quirk brick with bigger spray angle, gas jet and combustion-supporting air flow form certain interspersed angle, fully contact mixed combustion with excessive combustion air; Utilize excessive combustion air, make the ignition temperature in the quirk brick be lower than the normal burner temperature, suppress the generation of thermodynamics Nox; It is the secondary firing district in primary combustion zone downstream and surplus air mixed combustion from primary combustion zone that a plurality of secondary gas guns that another part gas of burner encloses quirk brick outer wall by ring enter and spray into along inclined-plane, quirk brick outer quirk brick center, high speed gas jet by the injection of secondary gas gun, make place, burner quirk brick outer form stronger negative pressuren zone, the flue gas that environment temperature is lower in the stove is under the effect of this negative pressure, fill negative pressuren zone fast, entering the secondary firing district mixes with secondary firing district flue gas, and the flue gas recirculation of mixing is incorporated into participates in burning in the high speed gas combustion gas, the flue gas cooling flame of inertia, reduce partial pressure of oxygen, and to reduce discharged nitrous oxides be outside flue gas recirculation and inner flue gas recirculation, and the generation of Nox is further reduced.
CN200910066235A 2009-10-23 2009-10-23 Forced-draft burner and method for regularizing side-combustion high-temperature preheated air of square-box furnace CN101694297A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102537961A (en) * 2010-12-20 2012-07-04 西安航天远征流体控制股份有限公司 Multi-nozzle semi-premixed gas burner
CN102537955A (en) * 2010-12-20 2012-07-04 西安航天远征流体控制股份有限公司 Multi-nozzle double-row burner for heating furnace
CN102563621A (en) * 2010-12-20 2012-07-11 西安航天远征流体控制股份有限公司 Heating furnace with multiple burners
CN103836626A (en) * 2012-11-27 2014-06-04 浙江海洋学院 Fuel gas energy-saving combustor
CN105570890A (en) * 2016-03-15 2016-05-11 河南方圆工业炉设计制造有限公司 Hot flue gas self-circulation type ultra-low NOx combustor
CN105570892A (en) * 2014-11-06 2016-05-11 佛山高富中石油燃料沥青有限责任公司 Gas burner
CN109701372A (en) * 2018-12-28 2019-05-03 李强 Coal mine pump drainage low concentration gas heat source sled
CN110553257A (en) * 2019-09-19 2019-12-10 洛阳瑞铝耐火材料有限公司 Novel high-efficiency low NO X burner

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102537961A (en) * 2010-12-20 2012-07-04 西安航天远征流体控制股份有限公司 Multi-nozzle semi-premixed gas burner
CN102537955A (en) * 2010-12-20 2012-07-04 西安航天远征流体控制股份有限公司 Multi-nozzle double-row burner for heating furnace
CN102563621A (en) * 2010-12-20 2012-07-11 西安航天远征流体控制股份有限公司 Heating furnace with multiple burners
CN103836626A (en) * 2012-11-27 2014-06-04 浙江海洋学院 Fuel gas energy-saving combustor
CN105570892A (en) * 2014-11-06 2016-05-11 佛山高富中石油燃料沥青有限责任公司 Gas burner
CN105570892B (en) * 2014-11-06 2017-12-01 佛山高富中石油燃料沥青有限责任公司 A kind of gas burner
CN105570890A (en) * 2016-03-15 2016-05-11 河南方圆工业炉设计制造有限公司 Hot flue gas self-circulation type ultra-low NOx combustor
CN109701372A (en) * 2018-12-28 2019-05-03 李强 Coal mine pump drainage low concentration gas heat source sled
CN110553257A (en) * 2019-09-19 2019-12-10 洛阳瑞铝耐火材料有限公司 Novel high-efficiency low NO X burner

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