CN103225881B - Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system - Google Patents

Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system Download PDF

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Publication number
CN103225881B
CN103225881B CN201310150263.6A CN201310150263A CN103225881B CN 103225881 B CN103225881 B CN 103225881B CN 201310150263 A CN201310150263 A CN 201310150263A CN 103225881 B CN103225881 B CN 103225881B
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air
boiler
powderheat
burner
unit
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CN201310150263.6A
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CN103225881A (en
Inventor
李动振
詹灵通
闫永胜
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SHENWU ENVIRONMENTAL TECHNOLOGY CO., LTD.
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ZHUJI TIANLI ENVIRONMENTAL PROTECTION ENERGY-SAVING TECHNOLOGY Co Ltd
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Priority to CN201310150263.6A priority Critical patent/CN103225881B/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 present invention relates to a kind of Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system, belong to technical field of heat transfer oil equipment.Comprise air inlet system, burner, boiler body, described boiler body comprises combustion chamber, radiation heating-surface and convection heating surface, and radiation heating-surface and convection heating surface are calandria structure, and radiation heating-surface and convection heating surface are installed in series at outer wall of combustion chamber; Burner and combustion chamber are connected; Air inlet system comprises air-intake device, secondary air device and three air-intake devices, one time air-intake device is connected with burner respectively with secondary air device, wherein, one time air-intake device is accessed by the middle part of burner, secondary air device is accessed by the bottom of burner, three times air intake is arranged in the middle part of the sidewall of combustion chamber, directly to combustion chamber air feed.The present invention's efficient oxygen-enriched combusting multicomponent powder heat conducting oil boiler has that automaticity is high, thermal efficiency advantages of higher.

Description

Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system
Technical field
The present invention relates to a kind of multicomponent powder heat conduction oil boiler furnace system of efficient oxygen-enriched combusting, belong to technical field of heat transfer oil equipment.
Background technology
Heat conducting oil boiler is Design Thinking based on forced circulation and the single flow special boiler developed, owing to being closed circulation heat supply, low pressure operation, can service life of prolonged boiler, liquid phase conveying heat energy, heat loss is less, energy-saving effect is comparatively remarkable, environment protecting is good, therefore, is widely used in oil, chemical industry, pharmacy, textile printing and dyeing, light industry, building materials, food, road asphalt are heated etc. needs the industrial circle of high temperature.Existing heat conducting oil boiler is mostly common chain, coal dust or fuel oil (gas) boiler, and the design of ubiquity heated face structure is unreasonable, and furnace heating surface is arranged less, boiler local heat load is higher, boiler tail high fume temperature, heat loss due to exhaust gas is large, and boiler thermal output is generally lower; Require higher to coal, regional feature is obvious, and coal is single, and coal is Shenmu County, Fugu three class high-quality bituminous coal.Be difficult to form stable fuel supply, the adaptability of coal is poor, and the coal only having quality higher just can use; Burner structure is designed with defect, be easy to form coking, N compound is wayward, the slagging scorification of integral combustion system, coking are serious, structure of boiler body directly applies mechanically fuel-oil or fuel-gas boiler structure, is unfavorable for the timely eliminating of lime-ash, have impact on long-term, the safe and effective operation of boiler, boiler ash discharge falls slag difficulty, has a strong impact on the safety and economic operation of steam generator system; Boiler load not easily adjusts, and load adjustment adaptability is poor, and usual operating load is greater than more than 70%, and the quality accidents such as combustion instability, ash content carbon rising, furnace puff easily occur; Coal dust burn-off rate is poor, ash content carbon sometimes up to 3000 kilocalories/kilogram; Flame diameter length cannot adjust, poor with boiler matching, and automatic control of boiler level is not high, and combustion adjustment difficulty, stoker's personnel labor intensity is excessive.
Have based on this, make the present invention.
Summary of the invention
For solving the problems of the technologies described above, the invention provides the multicomponent powder heat conducting oil boiler of the efficient oxygen-enriched combusting that a kind of automaticity is high, the thermal efficiency is high.
For achieving the above object, the technical scheme taked of the present invention is as follows:
Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system, comprise air inlet system, burner, boiler body, described boiler body comprises combustion chamber, radiation heating-surface and convection heating surface, radiation heating-surface and convection heating surface are calandria structure, and radiation heating-surface and convection heating surface are installed in series at outer wall of combustion chamber; Burner and combustion chamber are connected; Air inlet system comprises air-intake device, secondary air device and three air-intake devices, one time air-intake device is connected with burner respectively with secondary air device, wherein, one time air-intake device is accessed by the middle part of burner, secondary air device is accessed by the bottom of burner, three times air intake is arranged in the middle part of the sidewall of combustion chamber, directly to combustion chamber air feed.
For realizing better result of use, arranging further of technique scheme is as follows:
Described secondary air device comprises embrane method oxygen generator, air separator, secondary air channel and blower fan, for providing oxygen content at the oxygen-enriched air (oxygen content is the 25%-35% of the total gas couette accounting for the input of secondary air device) of 25-35% for burner.Secondary air device provides fuel rich oxygen condition for burner, the First air that air-intake device provides enters burner by middle part, the Secondary Air that secondary air device provides enters burner by bottom, on the one hand, fuel is in turbulent condition by First air and Secondary Air, be more conducive to fully contacting of fuel and air, on the other hand, oxygen-enriched combustion-supporting is beneficial to and improves flame adiabatic combustion theoretical temperatures, be beneficial to fuel to light rapidly, improve the stability of burning, improve efficiency of combustion, effectively reduce ash content carbon 2% ~ 3%, reduce excess air factor, reduce boiler discharging flue gas amount and effectively improve boiler thermal output.
Described boiler body also includes waste-heat recovery device, and waste-heat recovery device is connected by blast pipe and boiler body, blast pipe is provided with flue gas content detection device.
The outside erection of described combustion chamber has platform staircase, and platform staircase is provided with oil export and oil inlet, and conduction oil, after oil inlet enters, after boiler heating, after oil export heat energy that conduction oil is with is fed to heating equipment, then returns and reheats.
Described bottom, combustion chamber is provided with furnace hopper, and furnace hopper is the bucket-shaped structure formed by water-cooling wall, and for cooled slag, make it be solid-state smooth discharge, furnace hopper of the present invention can anti-coking, Anti-slagging.
Described boiler body outer wall is provided with explosion-protection equipment and sound wave ash remover.The security of whole production process guaranteed by explosion-protection equipment, and handled easily personnel process unsafe condition and critical condition in time; Acoustic wave ash ejector can clearing furnace and convection part dust stratification, in conjunction with furnace hopper structure, can facilitate the smooth discharge of lime-ash and drain.
The nozzle of three times described air-intake devices is provided with separator, according to coal powder light-dark, to strengthen mixing and disturbance of powder and air, improves the burn-off rate of coal dust further.
A described air-intake device is connected with burner with secondary air channel by primary air piping respectively with secondary air device, on primary air piping and secondary air channel, equal device has on-line monitoring system, on-line monitoring system comprises PLC control cabinet, wind speed probe and concentration probe, wind speed probe, concentration probe are connected in pipeline, and by the data feedback that detects to PLC control cabinet, PLC control cabinet sends warning or safety signal according to corresponding data area.
Adopt heat conduction oil boiler furnace system of the present invention, its operation principle and beneficial effect as follows:
(1) air-intake device and secondary air device form the oxygen enrichment air inlet system of burner, wherein, in the Secondary Air that secondary air device provides, oxygen content can reach about 25 ~ 35%, for burner provides fuel rich oxygen condition, and oxygen-enriched combustion-supporting is beneficial to raising flame adiabatic combustion theoretical temperatures, be beneficial to fuel to light rapidly, improve the stability of burning, improve efficiency of combustion, boiler can fuel coal dust more diversified, not only make the fuel source more diversification of heat conducting oil boiler, also effectively reduce ash content carbon 2 ~ 3 percentage points, reduce excess air factor, reduce boiler discharging flue gas amount, effectively improve boiler thermal output,
(2) radiation heating-surface adopts high-efficiency helical biradial heated face structure, convection heating surface adopts snakelike convection heating surface structure, radiation heating-surface and convection heating surface series connection, and adopt outlet structure, furnace binding layout is more suitable for the Thorough combustion of coal dust and burns rapidly; The smooth discharge that furnace hopper structural design is conducive to lime-ash with drain, radiation heating-surface and convection heating surface are calandria structure, can available protecting boiler setting, reduce body of heater external skin temperatures, reduce heat loss, ensure that tightness and the explosion-proof performance of burner hearth;
(3) on-line monitoring system is adopted can to carry out accurate Calculation to burner and combustion chamber intrinsic parameter, choose rational Heat-transfer Oil Pump parameter, realize energy-saving and cost-reducing, adopt PLC or DCS control system, on-line checkingi powder concentration, blast, air quantity, to boiler operatiopn load variations, flue gas oxygen content, the parameters such as combustion chamber draft carry out data acquisition and contrast computing, wind coal proportion in automatic adjustment air-intake device, realize whole combustion system and automatically run the automatic adjustment with load, complete flow, conduction oil temperature and pressure detecting, perfect early warning, alarm protecting apparatus, simple and clear operation interface, realize energy supply completely, the Automatic Control of the aspects such as burning and protection, there is automatic display, optimum configurations, automatic control function is perfect, complete, reliably, operating system is directly perceived, simple and direct,
(4) acoustic wave ash ejector can clearing furnace and convection part dust stratification, in conjunction with furnace hopper structure, and can anti-coking, Anti-slagging.
Adopt heat conduction oil boiler furnace system of the present invention, can reliable and stable safe and highly efficient operation, steam generator system load regulation range is comparatively broad, load regulation range can reach 40 ~ 110%, the powders such as fuel coal dust obtain the burning of high effect cleaning, low dust, low-sulfur are low-nitrogen discharged, and structure anti-coking Anti-slagging, coal is scalable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Number in the figure: 1, air inlet system; 11, an air-intake device; 111, primary air piping; 12, secondary air device; 121, embrane method oxygenerator; 122, air separator; 123, blower fan; 124, secondary air channel; 13, three air-intake devices; 131, separator; 2, burner; 3, boiler body; 31, combustion chamber; 32, radiation heating-surface; 33, convection heating surface; 34, waste-heat recovery device; 341, blast pipe; 35, furnace hopper; 36, flame detecting device; 4, platform staircase; 41, oil export; 42, oil inlet; 5, explosion-protection equipment; 6, sound wave ash remover; 7, on-line monitoring system; 71, PLC control cabinet; 72, wind speed probe; 73, concentration probe; 8, heavy boiler setting; 9, oxygen content of smoke gas detects.
Detailed description of the invention
Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system of the present invention, composition graphs 1, comprise air inlet system 1, burner 2, boiler body 3, boiler body 3 comprises combustion chamber 31, radiation heating-surface 32 and convection heating surface 33, radiation heating-surface 32 and convection heating surface 33 are calandria structure, and radiation heating-surface 32 and convection heating surface 33 adopt external to be arranged on combustion chamber 31 outer wall after connecting, burner 2 and combustion chamber 31 are connected, air inlet system 1 turnkey draws together an air-intake device 11, secondary air device 12 and three air-intake devices 13, one time air-intake device 11 is connected with burner 2 respectively with secondary air device 12, wherein, one time air-intake device 11 is accessed by the middle part of burner 2 by primary air piping 111, secondary air device 12 comprises embrane method oxygen generator 121, air separator 122, blower fan 123 and secondary air channel 124, for providing oxygen content at the oxygen-enriched air of 25-35% for burner 2, secondary air device 12 is accessed by the bottom of burner 2 by secondary air channel 124, the air that fuel and air-intake device are sent into fully contacts, on primary air piping 111 and secondary air channel 124, all device has on-line monitoring system 7, on-line monitoring system 7 comprises PLC control cabinet 71, wind speed probe 72 and concentration probe 73, wind speed probe 72, concentration probe 73 is connected in the pipeline of primary air piping 111 and secondary air channel 124, and by the data feedback that detects to PLC control cabinet 71, PLC control cabinet 71 sends warning or safety signal according to corresponding data area, three times air-intake device 13 is arranged in the middle part of the sidewall of combustion chamber 31, directly to combustion chamber 31 air feed, the nozzle of three air-intake devices 13 is provided with separator, according to coal powder light-dark, reinforcement powder mixes and disturbance with air, the burn-off rate of further raising coal dust.
In order to finishing the work of more system, boiler body 3 also includes waste-heat recovery device 34, furnace hopper 35, flame detecting device 36 and platform staircase 4, explosion-protection equipment 5 and sound wave dust separator 6.Wherein, waste-heat recovery device 34 is connected by blast pipe 341 and boiler body 3, blast pipe 341 is provided with flue gas content detection device, detects Exhaust Gas; Platform staircase 4 is erected at the outside of combustion chamber 31, platform staircase 4 is provided with oil export 41 and oil inlet 42, conduction oil is after the oil inlet 42 that position is lower enters, after boiler body 3 heats, the oil export 41 higher through position is discharged, after heat energy that conduction oil is with in oil pipe is fed to heating equipment, then returns and reheat; Burner 2 adopts oxygen enrichment high-efficient pulverized coal burner; Bottom, combustion chamber 31 is provided with furnace hopper 35, and furnace hopper 35 is the bucket-shaped structures formed by water (oil) cold wall, for cooled slag, makes it be solid-state smooth discharge, avoids coking, slagging scorification; Boiler body 3 outer wall is provided with explosion-protection equipment 5 and sound wave ash remover 6, acoustic wave ash ejector 6 can clearing furnace and convection part dust stratification, and in conjunction with furnace hopper 35 structure, can facilitate the smooth discharge of lime-ash and drain, explosion-protection equipment 5 ensure that the security of production process.
In use procedure, coal is after powder process processing factory is prepared into qualified coal dust, by airtight powder tank car, the coal dust meeting quality standard is injected boiler Stokehole pulverized coal by compressed air at regular time and quantity and store up tower, coal dust in coal dust storage tower sends into burner 2 by feeding system, due to one time, air-intake device 11 is accessed by the middle part of burner 2, secondary air device 12 is accessed by the bottom of burner 2, First air and Secondary Air make fuel be in turbulent condition, fuel fully can contact at the oxygen-enriched air of 25 ~ 35% with oxygen content, rapid pre-burning can be drawn in time, the flue gas of pre-burning and fuel arrive in the combustion chamber 31 of boiler body 3 further, under three air-intake devices 13 act on, reinforcement air mixes and disturbance with fuel powder, fuel obtains Thorough combustion, in flue gas, ash content carbon reduces by 2% ~ 3%, after the high-temperature flue gas produced completes radiation and heat convection in radiation heating-surface 32 and convection heating surface 33, enter and enter waste-heat recovery device 34 through blast pipe 341, the clean flue gas of discharging after dedusting enters air through chimney, the flyash that dedusting is collected is collected in grey storehouse through the closed system discharge of boiler body 3, carry out focusing on and utilizing.
Wherein, conduction oil is after the oil inlet 42 of platform staircase 4 enters, high efficient heat exchanging is carried out with the high-temperature flue gas produced in boiler body 3, after conduction oil is heated to be the working media meeting energy supply requirement, again via oil export 41 for user, get back to boiler body place after release heat energy to reheat, go round and begin again and recycle.Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system of the present invention is adopted to be applicable to the boiler of rated power at 7.0MW-70.0MW, fuel can be carried out the burning of high effect cleaning, the low dust of emission gases, the low nitrogen of low-sulfur, coking, slagging scorification phenomenon is it also avoid in overall structure, coal adapts to more extensive, requires lower, thus can realize the burning of diversification fuel powder to the coal of feed, the load regulation range of steam generator system is comparatively broad, and load regulation range can reach 40 ~ 110%.

Claims (4)

1. Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system, it is characterized in that: comprise air inlet system, burner, boiler body, described boiler body comprises combustion chamber, radiation heating-surface and convection heating surface, radiation heating-surface and convection heating surface are calandria structure, and radiation heating-surface adopts spiral biradial heated face structure, radiation heating-surface and convection heating surface are installed in series at outer wall of combustion chamber; Burner and combustion chamber are connected; Air inlet system comprises air-intake device, secondary air device and three air-intake devices, and one time air-intake device is connected with burner respectively with secondary air device, and wherein, one time air-intake device is accessed by the middle part of burner; Secondary air device comprises embrane method oxygen generator, air separator, secondary air channel and blower fan, is accessed at the oxygen-enriched air secondary air device of 25-35% for providing oxygen content for burner by the bottom of burner; Three times air intake is arranged in the middle part of the sidewall of combustion chamber, and directly to combustion chamber air feed, the nozzle of three air-intake devices is provided with separator, in order to strengthen mixing and disturbance of powder and air; Described boiler body also includes waste-heat recovery device, and waste-heat recovery device is connected by blast pipe and boiler body, blast pipe is provided with flue gas content detection device; A described air-intake device and the airduct of secondary air device are all provided with on-line monitoring system, on-line monitoring system comprises PLC control cabinet, wind speed probe and concentration probe, wind speed probe, concentration probe are connected in the pipeline of airduct, and by the data feedback that detects to PLC control cabinet; The outside erection of combustion chamber has platform staircase, and platform staircase is provided with oil export and oil inlet, and conduction oil, after oil inlet enters, after boiler heating, after oil export heat energy that conduction oil is with is fed to heating equipment, then returns and reheats.
2. Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system according to claim 1, it is characterized in that: described bottom, combustion chamber is provided with furnace hopper, furnace hopper is the bucket-shaped structure formed by oil cooling wall, for cooled slag, makes it be solid-state smooth discharge.
3. Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system according to claim 1, is characterized in that: described boiler body outer wall is provided with sound wave ash remover.
4. Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system according to claim 1, is characterized in that: described boiler body outer wall is provided with explosion-protection equipment.
CN201310150263.6A 2013-04-25 2013-04-25 Efficient oxygen-enriched-combmultiple-unit-powderheat multiple-unit-powderheat heat transfer oil boiler system Expired - Fee Related CN103225881B (en)

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CN104456946A (en) * 2014-11-05 2015-03-25 广东生益科技股份有限公司 Heat conduction oil furnace and control method thereof
CN104613631A (en) * 2014-12-08 2015-05-13 柳州东侯生物能源科技有限公司 Biomass burner detection device

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CN101556039A (en) * 2009-05-14 2009-10-14 西安建筑科技大学 Oxygen-enriched burner
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