CN105841142A - Efficient low-heating-value gas combustion boiler - Google Patents
Efficient low-heating-value gas combustion boiler Download PDFInfo
- Publication number
- CN105841142A CN105841142A CN201610348600.6A CN201610348600A CN105841142A CN 105841142 A CN105841142 A CN 105841142A CN 201610348600 A CN201610348600 A CN 201610348600A CN 105841142 A CN105841142 A CN 105841142A
- Authority
- CN
- China
- Prior art keywords
- boiler
- heating
- low
- value gas
- air preheater
- 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.)
- Pending
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 13
- 238000010438 heat treatment Methods 0.000 title abstract description 9
- 239000007789 gas Substances 0.000 claims abstract description 32
- 239000000779 smoke Substances 0.000 claims abstract description 20
- 239000004788 BTU Substances 0.000 claims description 10
- 230000000694 effects Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000000567 combustion gas Substances 0.000 abstract 1
- 230000002441 reversible Effects 0.000 abstract 1
- 239000003570 air Substances 0.000 description 15
- 239000000446 fuel Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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[C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910002089 NOx Inorganic materials 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 230000002596 correlated Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/02—Disposition of air supply not passing through burner
- F23C7/06—Disposition of air supply not passing through burner for heating the incoming air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2202/00—Fluegas recirculation
-
- 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
Abstract
The invention discloses an efficient low-heating-value gas combustion boiler. The efficient low-heating-value gas combustion boiler comprises a boiler body, a combustor and an air preheater, wherein the combustor is positioned on the left side of the boiler body; the air preheater is positioned on the right side of the boiler body; the boiler body comprises a barrel, a boiler liner positioned on the inner side of the barrel, a combustion gas connector positioned on the left lower part, a reversal chamber positioned on the right lower part, a second return smoke tube positioned on the upper part, a third return smoke tube positioned above the second return smoke tube, a front smoke box positioned on the left side and a rear smoke box positioned on the right side; and the air preheater is connected with the boiler body through a flue. The efficient low-heating-value gas combustion boiler has the beneficial effect that because low-heating-value gas stabilizes flame difficultly, the low-heating-value gas is directly discharged for a long time, huge energy waste is caused, through research and development of the project, the low-heating-value gas is directly combusted through the boiler, and therefore, running costs of enterprises are saved.
Description
Technical field
The present invention relates to boiler technology field, particularly relate to a kind of low-BTU gas efficient burning boiler.
Background technology
Low calorific value gas fuel generally refers to calorific value gaseous fuel between 2800 ~ 6280kJ/m3, industrial belonging to low calorific value gas fuel such as blast furnace gas, coal seam gasification coal gas, the various gasifier gas etc. of integral coal gasification, its calorific value just corresponds to the 1/10 ~ 1/8 of heating value of natural gas.The main component of blast furnace gas is CO and N2.Wherein CO is colourless, tasteless toxic gas.The content of every cube of blast furnace gas CO is about 0.5kg.By present GB 3095-2012 " ambient air quality ", the CO daily mean of concentration that its three grades of air quality standards specify is 6mg/m3.Every m3 blast furnace gas be enough to the CO content making 20,000 m3 air more than three grades of air quality standards, and serious environment pollution affects health.
Low-BTU gas composition with system operation conditions change thus calorific value is unstable, other be correlated with Wuli-Shili-Renli system approach also can change.Such as directly burning, heat power equipment is stablized properly functioning impact the biggest.Therefore being usually present such situation, low combustion value furnace gas can only discharge, and contained energy runs off and environmental pollution.
Summary of the invention
In view of the foregoing, the invention provides a kind of low-BTU gas efficient burning boiler.
For reaching above-mentioned purpose, the technical solution adopted for the present invention to solve the technical problems is:
A kind of low-BTU gas efficient burning boiler, including boiler body, is positioned at the burner on the left of described boiler body and is positioned at the air preheater on the right side of described boiler body；Described boiler body include cylinder, be positioned at the flue inside described cylinder, be positioned at lower left burning gases interface, be positioned at bottom-right return combustion chamber, the second backhaul smoke pipe above, be positioned at the 3rd backhaul smoke pipe above described second backhaul smoke pipe, be positioned at left side front smoke box and be positioned at right side rear smoke box；Described air preheater is connected by a flue and described boiler body.
Its further feature is as follows:
Described air preheater bag is provided with hot-flow flue and cold air duct.
Due to the utilization of technique scheme, the present invention compared with prior art has a following beneficial effect:
1. low-BTU gas is due to steady flame difficulty, the most directly discharges, causes huge energy waste, by this Project-developing, can directly be burnt by boiler, save operating cost for enterprise.
2. the content of every cube of blast furnace gas CO is about 0.5kg.By present GB 3095-2012 " ambient air quality ", the CO daily mean of concentration that its three grades of air quality standards specify is 6mg/m3.Every m3 blast furnace gas be enough to make the CO content of 20,000 m3 air, and more than three grades of air quality standards, serious environment pollution affects health.By this Project-developing, meet national standard by the exhaust emissions after boiler combustion.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the present invention a kind of low-BTU gas efficient burning boiler.
Detailed description of the invention
Below in conjunction with specific embodiment, present disclosure is described in further detail:
Refering to Fig. 1, a kind of low-BTU gas efficient burning boiler, including boiler body, it is positioned at the burner 1 on the left of described boiler body and is positioned at the air preheater 11 on the right side of described boiler body；Described boiler body include cylinder 6, be positioned at the flue 3 inside described cylinder, be positioned at lower left burning gases interface 2, be positioned at bottom-right return combustion chamber 4, the second backhaul smoke pipe 7 above, be positioned at the 3rd backhaul smoke pipe 8 above described second backhaul smoke pipe, be positioned at left side front smoke box 5 and be positioned at right side rear smoke box 9；Described air preheater is connected by a flue 10 and described boiler body.Described air preheater bag is provided with hot-flow flue 12 and cold air duct 13.
1., for the feature design large-scale combustion room that low calorific value gas fuel exhaust gas volumn is big, combustor, than conventional increase 20%, the boiler structure of high circulation area, adjusts afterbody waste-heat recovery device way of recycling, keeps boiler to have higher efficiency；
2. according to the change of the composition of low calorific value gas fuel, add a certain amount of H2, one or more of CO, CH4, make the burning can be with even running；Meanwhile, flame combustion chamber central temperature to be controlled, within 1500 DEG C, reduces the generation of NOx, to reach the optimum of combustion system；
3. increase boiler tail UTILIZATION OF VESIDUAL HEAT IN, the temperature to more than 200 DEG C of combustion air is greatly improved, it is beneficial to the burning of low calorific value gas fuel and reduces heat loss due to exhaust gas, it is remarkably improved the operational efficiency of heating equipment, makes boiler efficiency grade meet and exceed two grades of Energy Efficiency Standards that TSG G0002-2010 " boiler energy-saving technical supervision rule of management " specifies.
Above-described embodiment is only for technology design and the feature of the explanation present invention; its object is to allow person skilled in the art will appreciate that present disclosure and to be carried out; can not limit the scope of the invention with this; all equivalence changes made according to spirit of the invention or modification, all should contain within the scope of the present invention.
Claims (2)
1. a low-BTU gas efficient burning boiler, it is characterised in that include boiler body, be positioned at the burner on the left of described boiler body and be positioned at the air preheater on the right side of described boiler body；
Described boiler body include cylinder, be positioned at the flue inside described cylinder, be positioned at lower left burning gases interface, be positioned at bottom-right return combustion chamber, the second backhaul smoke pipe above, be positioned at the 3rd backhaul smoke pipe above described second backhaul smoke pipe, be positioned at left side front smoke box and be positioned at right side rear smoke box；
Described air preheater is connected by a flue and described boiler body.
A kind of low-BTU gas efficient burning boiler the most according to claim 1, it is characterised in that: described air preheater bag is provided with hot-flow flue and cold air duct.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107917428A (en) * | 2017-11-28 | 2018-04-17 | 湖南长宏南雁锅炉修理安装有限公司 | The refuse pyrolysis steam pot furnace system of high-efficiency environment friendly |
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