CN205939204U - High -efficient low emission boiler gas recirculation device - Google Patents

High -efficient low emission boiler gas recirculation device Download PDF

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Publication number
CN205939204U
CN205939204U CN201620905686.3U CN201620905686U CN205939204U CN 205939204 U CN205939204 U CN 205939204U CN 201620905686 U CN201620905686 U CN 201620905686U CN 205939204 U CN205939204 U CN 205939204U
Authority
CN
China
Prior art keywords
pipe
flue gas
boiler
flow
circulating fan
Prior art date
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
Application number
CN201620905686.3U
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Chinese (zh)
Inventor
朱九喜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JINAN YONGQUAN ENERGY-SAVING ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Original Assignee
JINAN YONGQUAN ENERGY-SAVING ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JINAN YONGQUAN ENERGY-SAVING ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd filed Critical JINAN YONGQUAN ENERGY-SAVING ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Priority to CN201620905686.3U priority Critical patent/CN205939204U/en
Application granted granted Critical
Publication of CN205939204U publication Critical patent/CN205939204U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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 utility model discloses a high -efficient low emission boiler gas recirculation device, it is equipped with dust collector including connecting a hot air duct on the boiler plenum and connecting the pipe of discharging fume on the boiler afterbody goes out the tobacco pipe on the pipe of discharging fume, being connected with recirculated flue gas pipe again in the portion's section that lies in the dust collector rear portion on the pipe of discharging fume, installing gaseous proportion blender on the recirculated flue gas pipe again, be connected with oxygen on another air inflow branch of gaseous proportion blender and advance the pipe, the end -to -end connection of recirculated flue gas pipe has circulating fan again, and circulating fan's air -out union coupling is on a hot air duct. The utility model discloses the emission of flue gas has been reduced when making the flue gas heat content be worth with cyclic utilization to reach energy saving and emission reduction's effect.

Description

Efficient low-discharging boiler flue gas recirculation device
Technical field
This utility model is related to a kind of efficient low-discharging boiler flue gas recirculation device.
Background technology
The flue gas producing after conventional fire coal, the fuel combustion in running of gas power plant's large medium-size boiler is directly arranged It is put in air, while flue gas has taken away substantial amounts of heat, the dust in flue gas and nitrogen oxides, the country such as sulfur dioxide The emission limiting, certainly will cause boiler thermal output to reduce, the phenomenon of energy waste.
Utility model content
The technical problems to be solved in the utility model is for above-mentioned deficiency, provide one kind can flue gas recycled from And the efficient low-discharging boiler flue gas recirculation device of energy saving.
In order to solve above-mentioned technical problem, this utility model provides a kind of efficient low-discharging boiler smoke of following structure EGR, it includes a hot-flow flue being connected on boiler air compartment and is connected to the smoke evacuation on boiler tail pipe Pipe, equipped with dust arrester on smoke exhaust pipe, its construction features is:It is located on described smoke exhaust pipe and connect in the section at dust arrester rear portion It is connected to flue gas recycled pipe, flue gas recycled pipe is provided with proportional gas mixer, another air inlet of proportional gas mixer Oxygen inlet pipe is connected with branch road, the end of flue gas recycled pipe is connected with circulating fan, and the discharge pipe of circulating fan is connected to On hot-flow flue.
After said structure, by the flue gas of smoke exhaust pipe after dust removal process, then it is passed through the oxygen of proper ratio, thus Produce into oxygen-enriched hot air, oxygen-enriched hot air is blown in a hot-flow flue by circulating fan, thus being the air compartment air feed of boiler, flue gas While discharge reduces, turn waste into wealth, so that flue gas recirculation is utilized, reach the purpose of energy-saving and emission-reduction.
It is located on described flue gas recycled pipe and be connected with flow control valve, oxygen in the section at proportional gas mixer rear Flow valve is connected with inlet pipe.
Valve and oxygen analyser are connected with the discharge pipe of described circulating fan.
Described oxygen analyser is arranged near the discharge pipe of circulating fan and the junction of a hot-flow flue.
Built with heat exchanger, a described hot-flow flue is connected to pot after passing through heat exchanger to described boiler tail pipe On stove air compartment, the junction of the discharge pipe of described circulating fan and a hot-flow flue is located at the rear of heat exchanger.
In sum, this utility model makes flue gas enthalpy be worth to decrease the discharge of flue gas while recycling, with Reach the effect of energy-saving and emission-reduction.Advantage of the present utility model is as follows:1)So that flue gas recirculation is reclaimed by plug-in corresponding mechanism, return Receive the heat enthalpy value of flue gas, the corresponding mechanism of increase and original system do not conflict, when unstable combustion timing, can off-the-line at any time, no Impact original system normally runs;2)Recirculation blower adjusts flue gas flow, calculates the corresponding oxygen flow mixing by program, uses The flow valve of oxygen controls flow, and whole-course automation degree is high;3)By flue gas recirculation, while energy saving, reduce The discharge of dust, sulfur dioxide and nitrogen oxides is it is achieved that good environment protecting.
Brief description
Below in conjunction with the accompanying drawings specific embodiment of the present utility model is described in further detail:
Fig. 1 is that a kind of embodiment of this utility model is connected to the structural representation on boiler;
Fig. 2 is the structural representation of embodiment in Fig. 1.
Specific embodiment
As depicted in figs. 1 and 2, in figure gives a kind of embodiment of efficient low-discharging boiler flue gas recirculation device, is Convenient description, the fore-and-aft direction being this device with flue gas trend, that is, smoke evacuation direction is the front of this device, and it includes being connected to pot A hot-flow flue 1 on stove air compartment and be connected to smoke exhaust pipe 2 on boiler tail pipe 10, equipped with dedusting on smoke exhaust pipe 2 Device, in the present embodiment, this dust arrester is electric cleaner naturally it is also possible to adopt other other structures of the prior art Dust arrester, on described smoke exhaust pipe 2 be located at dust arrester rear portion section on be connected with flue gas recycled pipe 3, recirculation cigarette Proportional gas mixer 4 is provided with trachea 3, another air inlet branch road of proportional gas mixer is connected with oxygen inlet pipe 5, then The end of circulating flue gas pipe 3 is connected with circulating fan 6, and the discharge pipe of circulating fan 6 is connected on a hot-flow flue 1, described again It is located on circulating flue gas pipe 3 and is connected with flow control valve 7 in the section at proportional gas mixer rear, oxygen inlet pipe 5 connects There is flow valve, the discharge pipe of described circulating fan is connected with valve 8 and oxygen analyser 9, described oxygen analyser 9 is near circulating fan The junction setting of discharge pipe and a hot-flow flue, described boiler tail pipe 10 built with heat exchanger, described once heat Air channel 1 is connected on boiler air compartment after passing through heat exchanger, the junction of the discharge pipe of described circulating fan and a hot-flow flue Rear positioned at heat exchanger.
As shown in figure 1, in figure illustrates the structure of whole steam generator system, it includes boiler body 20, boiler body 20 Side arranges feeder structure 21, the lower section setting boiler air compartment 22 of boiler body, and the smoke pipeline at boiler top is connected with rotation Wind cleaner unit 23, the rear of cyclone dust extractor 23 connects boiler tail pipe 10, and smoke exhaust pipe 2 is via smoke exhaust fan 25 and cigarette Cylinder 26 outwards discharges, and in the present system, arranges a hot-flow flue 1 and second heat air channel 24, a hot-flow flue 1 and second heat Air channel 24 is all by blower fan air feed, and second heat air channel 24 is also via the heat exchanger in above-mentioned boiler tail pipe 10, and two The hot blast of secondary hot-flow flue 24 feeds in the burner hearth of boiler body.
The flue gas of boiler, through calculating taking the CFBB of a 75T/H as a example, boiler flue gas per hour Discharge capacity is 82500Nm3/h, and smoke components are mainly three atomic gas, and theoretical nitrogen and theoretical vapor three part are constituted, its In also have the oxygen that part excess air brings, the volume fraction occupied in flue gas is about 7-9%. most boilers at present After the completion of burning, this partial fume is to enter chimney through air-introduced machine after dedusting, desulfurization to be directly discharged in air.Using this After the scheme of utility model, boiler is discharged into flue gas in air by circulating fan 6 recycled fume pipe 3 suction, by gas Proportioner 4 adds the oxygen of certainty ratio in flue gas simultaneously, increases the oxygen content in flue gas by the industrial pure oxygen of increase, Make hypoxic flue gas originally be changed into oxygen content in the oxygen-enriched flue gas of 22-25%, this flue gas is entered by hot-flow flue 1 of boiler Air compartment, substitutes the hot-air of script, participates in burning, thus reaching the purpose of energy-conserving and environment-protective, and is guarantee system flue gas flow With the flow equilibrium of combustion-supporting gas during burning, by automatically controlling of flow control valve 7, flow valve, valve 8 and oxygen analyser 9, from And precise control is passed through the hot blast oxygen content of air compartment and hot blast rate it is ensured that the abundant burning of fire coal.
The above is specific constructive form of the present utility model, and this utility model is not restricted to the described embodiments, For those skilled in the art, the equivalent variations based on concrete structure on this utility model and part replacement are all new in this practicality In the protection domain of type.

Claims (5)

1. a kind of efficient low-discharging boiler flue gas recirculation device, including a hot-flow flue being connected on boiler air compartment(1)With And it is connected to boiler tail pipe(10)On smoke exhaust pipe(2), smoke exhaust pipe(2)On equipped with dust arrester it is characterised in that:Institute State smoke exhaust pipe(2)Above it is located at and be connected with flue gas recycled pipe in the section at dust arrester rear portion(3), flue gas recycled pipe(3)On Proportional gas mixer is installed(4), another air inlet branch road of proportional gas mixer is connected with oxygen inlet pipe(5), then follow Ring fume pipe(3)End be connected with circulating fan(6), circulating fan(6)Discharge pipe be connected to a hot-flow flue(1)On.
2. efficient low-discharging boiler flue gas recirculation device as claimed in claim 1 it is characterised in that:Described flue gas recycled Pipe(3)Above it is located at and be connected with flow control valve in the section at proportional gas mixer rear(7), oxygen inlet pipe(5)On be connected with Flow valve.
3. efficient low-discharging boiler flue gas recirculation device as claimed in claim 1 it is characterised in that:Described circulating fan Valve is connected with discharge pipe(8)And oxygen analyser(9).
4. efficient low-discharging boiler flue gas recirculation device as claimed in claim 3 it is characterised in that:Described oxygen analyser(9) Near the discharge pipe of circulating fan and the junction setting of a hot-flow flue.
5. the efficient low-discharging boiler flue gas recirculation device as any one of claim 1-4 it is characterised in that:Described Boiler tail pipe(10)Built with heat exchanger, a described hot-flow flue(1)It is connected to boiler air through after heat exchanger On room, the junction of the discharge pipe of described circulating fan and a hot-flow flue is located at the rear of heat exchanger.
CN201620905686.3U 2016-08-20 2016-08-20 High -efficient low emission boiler gas recirculation device Expired - Fee Related CN205939204U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620905686.3U CN205939204U (en) 2016-08-20 2016-08-20 High -efficient low emission boiler gas recirculation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620905686.3U CN205939204U (en) 2016-08-20 2016-08-20 High -efficient low emission boiler gas recirculation device

Publications (1)

Publication Number Publication Date
CN205939204U true CN205939204U (en) 2017-02-08

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108759492A (en) * 2018-06-15 2018-11-06 内蒙古君正化工有限责任公司 A kind of control method of solid caustic soda molten salt furnace flue gas oxygen content

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108759492A (en) * 2018-06-15 2018-11-06 内蒙古君正化工有限责任公司 A kind of control method of solid caustic soda molten salt furnace flue gas oxygen content

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20170208

Termination date: 20190820