CN103234211B - Carry the biomass boiler of one-level ceramic multi-tube cyclone dust removal - Google Patents
Carry the biomass boiler of one-level ceramic multi-tube cyclone dust removal Download PDFInfo
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- CN103234211B CN103234211B CN201310138574.0A CN201310138574A CN103234211B CN 103234211 B CN103234211 B CN 103234211B CN 201310138574 A CN201310138574 A CN 201310138574A CN 103234211 B CN103234211 B CN 103234211B
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Abstract
The invention provides a kind of back-end ductwork of biomass boiler and a kind of biomass boiler, wherein, the back-end ductwork of described biomass boiler adopts U-shaped layout, and flue gas after described back-end ductwork top drops to bottom, then rises to top by bottom; Described back-end ductwork comprises: be arranged in described back-end ductwork flue gas is upwards folded to the position of flowing deduster from level, and, be positioned at the first flue-dust retainer below described deduster; After deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer; Be positioned at one or more economizers of the position that flue gas flows from bottom to top; And, the first air preheater above the economizer being positioned at the position that described flue gas flows from bottom to top.The present invention can improve boiler from dust collection capacity, reduce boiler dust removal equipment and take up an area and investment cost and the various problems that cause of solution collecting ash.
Description
Technical field
The present invention relates to technical field of mechanical equipment, particularly relate to a kind of back-end ductwork of biomass boiler and a kind of biomass boiler.
Background technology
The living beings such as agricultural crop straw, bagasse, rice husk send into boiler combustion as fuel, and the steam of generation is for generate electricity or heat supply is the Biomass Energy Utilization technology that country advocates.For the characteristic of biomass fuel, grate firing is adopted to add suspension combustion, or, suspension combustion, or the combustion system such as recirculating fluidized bed is the burning process of common maturation, after adopting the boiler of above-mentioned burning process to burn, the original discharge concentration of flue dust higher (after stove the efficiency of dust collection of deduster will reach more than 99.8% just can reach current environment protection emission and require) in boiler exhaust gas, and the particle often containing band Mars in flue gas, has the harm of scaling loss to sack cleaner after stove.
The schematic diagram of suspension combustion biomass boiler and dust pelletizing system is added with reference to grate firing typical in a kind of prior art shown in figure 1, this typical grate firing adds suspension combustion biomass boiler and dust pelletizing system generally by feeding system, the biomass boiler be connected with feeding system, and, external dust arrester composition.Fuel reaches biomass boiler through feeding system, produce flue gas after combustion, flue gas carries out discharging after dedusting through external dust arrester, because external dust arrester adopts sack cleaner, once containing the particle being with Mars, the harm of scaling loss will be produced to sack cleaner in flue gas.For this problem, propose in prior art and increase one cyclonic deduster between biomass boiler and sack cleaner, to remove the particle of band Mars.But increase cyclone needs to configure separately, and corresponding increase floor space and equipment cost.
With reference to the schematic diagram of a kind of existing typical biomass boiler shown in figure 2, this typical suspension combustion biomass boiler and dust pelletizing system generally by feeding system, the biomass boiler be connected with feeding system, and, external dust arrester composition.Fuel reaches biomass boiler through feeding system, produce flue gas after combustion, flue gas is through back-end ductwork, eventually pass after external dust arrester carries out dedusting and discharge, the flow of flue gas direction of boiler back end ductwork is top-down as shown by arrows in FIG., flue dust under self gravitation effect, for the easy dust stratification of economizer of bundled tube horizontal shown in figure, collecting ash
Easily cause the problem of the following aspects: 1. cause security incident; 2. reduce the thermal efficiency, waste fuel; 3. reduce boiler output; 4. reduce boiler life; 5. reduce economic benefit.
Therefore, those skilled in the art need the urgent problem solved to be: provide a kind of back-end ductwork of biomass boiler and a kind of biomass boiler, in order to improve boiler from dust collection capacity, reduce boiler dust removal equipment and take up an area and investment cost and the various problems that cause of solution collecting ash.
Summary of the invention
In view of this, the present invention is directed to above-mentioned prior art Problems existing to make improvements, namely the technical problem to be solved in the present invention is to provide a kind of back-end ductwork and biomass boiler of biomass boiler, can improve boiler from dust collection capacity, reduce boiler dust removal equipment and take up an area and investment cost and the various problems that cause of solution collecting ash.
For solving the problems of the technologies described above, the embodiment of the invention discloses a kind of back-end ductwork of biomass boiler, described back-end ductwork adopts U-shaped layout, and flue gas after described back-end ductwork top drops to bottom, then rises to top by bottom; Described back-end ductwork comprises: be arranged in described back-end ductwork flue gas is upwards folded to the position of flowing deduster from level, and, be positioned at the first flue-dust retainer below described deduster; After deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer; Be positioned at one or more economizers of the position that flue gas flows from bottom to top; And, the first air preheater above the economizer being positioned at the position that described flue gas flows from bottom to top.
Preferably, the back-end ductwork of described biomass boiler, also comprises:
Be positioned at the water seal scraper plate Machine for cleaning-out ash bottom described first flue-dust retainer.
Preferably, described deduster is for axially entering type multi-tube dust cleaner.
Preferably, the back-end ductwork of described biomass boiler, also comprises:
Be positioned at one or more economizers of the position that flue gas flows from top to bottom; And, at the second air preheater of the below of the position that described flue gas flows from top to bottom.
Preferably, the back-end ductwork of described biomass boiler, also comprises:
Be positioned at described flue gas to flow from top to bottom second flue-dust retainer of bottom position; And, be positioned at the unloading valve below described second flue-dust retainer.
Preferably, when adopting the back-end ductwork of described biomass boiler to carry out dedusting, comprise with the next stage:
The flue gas decline stage: flue gas declines from described back-end ductwork top, through economizer and the second air preheater;
In the dedusting stage: be upwards folded to the position of flowing at flue gas from level, flue gas enters deduster, after deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer;
Flue gas ascent stage: the flue gas through dust removal process rises bottom described back-end ductwork, discharges from described back-end ductwork top through economizer and the first air preheater.
The embodiment of the invention also discloses a kind of biomass boiler, comprise feeding system, the combustion furnace be connected with described feeding system, and, with the back-end ductwork be connected of described combustion furnace: described back-end ductwork adopts U-shaped layout, flue gas after described back-end ductwork top drops to bottom, then rises to top by bottom; Described back-end ductwork comprises: be arranged in described back-end ductwork flue gas is upwards folded to the position of flowing deduster from level, and, be positioned at the first flue-dust retainer below described deduster; After deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer; Be positioned at one or more economizers of the position that flue gas flows from bottom to top; And, the first air preheater above the economizer being positioned at the position that described flue gas flows from bottom to top.
Preferably, described back-end ductwork also comprises:
Be positioned at the water seal scraper plate Machine for cleaning-out ash bottom described first flue-dust retainer.
Preferably, described deduster is for axially entering type multi-tube dust cleaner.
Preferably, described back-end ductwork also comprises:
Be positioned at one or more economizers of the position that flue gas flows from top to bottom, and, at the second air preheater of the below of the position that described flue gas flows from top to bottom.
Compared with prior art, tool of the present invention has the following advantages:
The present invention is by adopting U-shaped layout to change flow of flue gas direction at boiler back end ductwork, particularly, prior art flow of flue gas direction is first up and then down, flow of flue gas direction of the present invention gets on, get off, namely flow of flue gas (dedusting) is divided into following three phases: 1, the flue gas decline stage: flue gas declines from described back-end ductwork top, through economizer and the second air preheater; 2, in the dedusting stage: be upwards folded to the position of flowing at flue gas from level, flue gas enters deduster, after deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer; 3, flue gas ascent stage: the flue gas through dust removal process rises bottom described back-end ductwork, discharges from described back-end ductwork top through economizer and the first air preheater.Solve horizontal bundled tube economizer dust stratification problem.
Further, the position of flowing is upwards folded to from level at flue gas, arrange deduster, a flue-dust retainer is arranged below this deduster, described flue-dust retainer is the first flue-dust retainer, for ensureing the negative pressure of boiler at this flue-dust retainer position, prevent cold wind from leaking into boiler, regularly take dust stratification out of simultaneously, also bottom flue-dust retainer, be provided with water seal scraper plate Machine for cleaning-out ash simultaneously, after flue dust enters deduster along back-end ductwork, flue dust is under the effect of rotary centrifugal force, separated from flue gas, and then fall under gravity in flue-dust retainer, reach the effect of initial dedusting, the present invention passes through at back-end ductwork internal placement deduster, thus improve biomass boiler from dust collection capacity.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that in a kind of prior art, typical grate firing adds suspension combustion biomass boiler and dust pelletizing system;
Fig. 2 is a kind of schematic diagram of existing typical biomass boiler;
Fig. 3 is the structure chart of the back-end ductwork example of a kind of biomass boiler of the present invention;
Fig. 4 is the structure chart that a kind of axis of the present invention enters type multi-pipe china dust removing device;
Fig. 5 is the axial schematic diagram entering blade of ceramic dust-removing element that a kind of axis of the present invention enters type multi-pipe china dust removing device.
Detailed description of the invention
For making structure of the present invention, characteristic and advantage clearly, before being described in detail below in conjunction with specific embodiment, first the prior art that background technology part is mentioned is illustrated by reference to the accompanying drawings.
Fig. 1 and Fig. 2 is respectively boiler common in prior art and its dust arrester schematic diagram.
The schematic diagram of suspension combustion biomass boiler and dust pelletizing system is added with reference to grate firing typical in a kind of prior art shown in figure 1, this typical grate firing adds suspension combustion biomass boiler and dust pelletizing system generally by the feeding system indicated in figure, the biomass boiler be connected with feeding system, and, external dust arrester composition, particularly, external dust arrester comprises: cyclone dust collectors and bag-type dust equipment.Fuel reaches biomass boiler through feeding system, produces flue gas after combustion, and flue gas carries out discharging after dedusting through external dust arrester.Particularly, dust arrester is connected on boiler back end ductwork by cyclone dust collector and dust-removal cloth-bag by external mode, back-end ductwork is that inverted u-shaped fixes on the ground, the flue gas with flue dust produced by boiler combustion is lowered through after external cyclone dust collector carries out rough dusting through straight line after back-end ductwork first rises through horizontal junction, top and carries out final dusting through bag-type dust again, finally discharges the flue gas through dust removal process.
With reference to the schematic diagram of the typical suspension combustion biomass boiler shown in figure 2 and dust pelletizing system, this typical suspension combustion biomass boiler and dust pelletizing system generally by feeding system, the biomass boiler be connected with feeding system, and, external dust arrester composition.External dust arrester is cyclone dust collector, back-end ductwork is that inverted u-shaped fixes on the ground, the flue gas with flue dust produced by boiler combustion straight line after back-end ductwork first rises through horizontal junction, top declines, the economizer of flue gas step by step through laterally restraining in flue, afterwards through external cyclone dust collector dedusting, finally discharge the flue gas through dust removal process.
For the dedusting method of these two kinds of boilers, the design of boiler does not all have from dust collection capacity, and user needs to configure cyclone dust collectors separately and removes Mars and oarse-grained flue dust, takes up an area and invests higher; Meanwhile, the flow of flue gas direction of boiler back end ductwork is top-down, and soot dust granule constantly down fall owing under self gravitation effect, the easy dust stratification of the economizer for horizontal bundled tube.
Embodiments of the present invention are exactly the improvement do not made from dust collection capacity and dust stratification problem for boiler in prior art.One of core idea of the embodiment of the present invention is, by changing the arrangement of boiler back end ductwork, utilize the change of boiler back end ductwork flue gas flow direction, deduster is set up in back-end ductwork, improve boiler from dust collection capacity, reach the object of external dedusting after abandoning stove, to reduce dust arrester floor space and equipment cost.
With reference to the structure chart of the back-end ductwork example of the of the present invention a kind of biomass boiler shown in figure 3, for sake of convenience, hereinafter alleged " left side " and " right side " and a left side for accompanying drawing itself, right direction is consistent, but does not play restriction effect to structure of the present invention.
As shown in Figure 3, in embodiments of the present invention, described back-end ductwork can adopt U-shaped layout, based on described U-shaped layout, described back-end ductwork can be divided into left flue and right flue, and left flue is connected by U-shaped foot passage with right flue, this flue profile can be preferably rectangle, can certainly be other shapes such as cylinder type, whole back-end ductwork preferably can support with boiler tail steelframe, and other bolts or embedded mode can certainly be adopted to fix.Inner at described back-end ductwork, flow of flue gas direction can be: flue gas after back-end ductwork top drops to bottom, then rises to top by bottom; Namely being appreciated that described back-end ductwork inside smoke flow direction is flue gas admission passage from top to bottom, is fume emission passage from the bottom up; Namely the flowing of back-end ductwork inside smoke first declines to rising afterwards.
In embodiments of the present invention, described back-end ductwork can comprise: be arranged in described back-end ductwork flue gas is upwards folded to the position of flowing deduster from level, and, be positioned at the first flue-dust retainer below described deduster; After deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer.
As a kind of preferred exemplary of specific implementation of the present invention, described deduster can adopt and axially enter type multi-pipe china dust removing device, and in specific implementation, described deduster preferably can be fixed on right side flue by the porous barrier of steel.The structure chart of type multi-pipe china dust removing device is entered with reference to the of the present invention a kind of axis shown in figure 4, ceramic multi-tube cyclone dust collectors are arranged with a lot of ceramic dust-removing element laterally arranged side by side, after ash-laden gas enters described ceramic dust-removing element, the soot dust granule separated falls under gravity into the first flue-dust retainer, and purified gas is discharged through fume emission passage.The dust removal process of ceramic dust-removing element wherein axially can enter blade schematic diagram by the ceramic dust-removing element shown in reference diagram 5, flue gas flows through the airflow direction of element as shown by arrows in FIG., do rotary flowing, utilize the centrifugal force produced to be separated with flue gas by unequal for quality soot dust granule, carry out centrifugal dedusting.
After deduster is separated flue dust from flue gas, flue dust under gravity, drop in the first flue-dust retainer, the effect of flue-dust retainer is used to collect dust, so that uniform effluent, flue-dust retainer and flue Nature Link, flue-dust retainer is up big and down small, the shape of flue-dust retainer can be pyramid, also can be transitioned into taper shape from pyramid when highly allowing.
In one preferred embodiment of the invention, described back-end ductwork can also comprise: be positioned at the water seal scraper plate Machine for cleaning-out ash bottom described first flue-dust retainer.Described water seal scraper plate Machine for cleaning-out ash not only can ensure the negative pressure of boiler at this position, can also prevent cold wind from leaking into boiler, regularly takes dust stratification out of simultaneously.
In embodiments of the present invention, described back-end ductwork can also comprise: the one or more economizers being positioned at the position that flue gas flows from bottom to top.
In specific implementation, described back-end ductwork can also comprise the one or more economizers being positioned at the position that flue gas flows from top to bottom.
For for purpose of brevity, the economizer that described Fig. 3 is positioned at left side back-end ductwork is placed with " one-level economizer " from top to down successively, " secondary economizer ", " three grades of economizers ", " level Four economizer ", " the second air preheater ", the economizer being positioned at right side back-end ductwork is placed with " final stage economizer ", " the first air preheater ".What be positioned at the position that flue gas flows from bottom to top is provided with one or more economizer, for absorbing the heat of flue gas in flue, promote hot efficiency of combustion, in the back-end ductwork of left side, be dispersed with from top to down " one-level economizer ", " secondary economizer ", " three grades of economizers ", " level Four economizer ", " the second air preheater ", it should be noted that, these economizers can be arranged arbitrarily in practice, one can be arranged, also can arrange multiple, the quantity of concrete setting can depending on flue length and thermally equilibrated needs, the present invention to this without the need to being limited.These economizers can be adopted as horizontal bundled tube economizer, fixed form can be fixed on U-shaped back-end ductwork inside by bolt or other.Particularly, the effect of described economizer can be: the heat 1, absorbing low-temperature flue gas, reduces exhaust gas temperature, reduces flue gas loss, fuel saving; 2, due to feedwater enter drum before first in economizer heating, because this reducing the heat absorption of feeding water at heating surface, can replace with economizer the evaporating heating surface that part cost is higher; 3, feed temperature improves, and entering drum will reduce wall temperature difference, and thermal stress reduces accordingly, extends drum service life.
In one preferred embodiment of the invention, the back-end ductwork of described biomass boiler can also comprise: the second air preheater being positioned at the below of one or more economizers of the position that described flue gas flows from top to bottom; And, be positioned at the first air preheater of the top of one or more economizers of the position that flue gas flows from bottom to top.Air preheater, generally referred to as air preheater, is used for coal-fired power station boiler, and can be box type or swinging, be box type in preferred embodiment.Described box type air preheater operation principle is: flue gas flows through from bobbin carriage outside, and air passes through from bobbin carriage inside, by temperature difference different heat transfer.Identical with the principle such as economizer, superheater.
In one preferred embodiment of the invention, the back-end ductwork of described biomass boiler can also comprise: be positioned at the unloading valve below described second flue-dust retainer.Particularly, left side stack base is provided with a flue-dust retainer, flue-dust retainer and flue Nature Link, and flue-dust retainer is up big and down small, and the shape of flue-dust retainer can be pyramid, also can be transitioned into taper shape from pyramid when highly allowing.At flue-dust retainer lower openings place, a unloading valve is housed.In order to make back-end ductwork be protected safely, selecting of described unloading valve just make sealing below flue-dust retainer and maximum pressure and the maximum temperature that can bear flue.
In one preferred embodiment of the invention, the back-end ductwork dust removal process of described biomass boiler can comprise following several stages:
The flue gas decline stage: flue gas declines from described back-end ductwork top, through economizer and the second air preheater;
In the dedusting stage: be upwards folded to the position of flowing at flue gas from level, flue gas enters deduster, after deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer;
Flue gas ascent stage: the flue gas through dust removal process rises bottom described back-end ductwork, discharges from described back-end ductwork top through economizer and the first air preheater.
It should be noted that, in above-mentioned embodiment U-shaped structure tail portions flue and everywhere immobilization material be metal material form, miscellaneous part is then according to function, and purposes and suitable environment carry out selection.
In sum, the present invention is by adopting U-shaped layout to change flow of flue gas direction at boiler back end ductwork, particularly, prior art flow of flue gas direction is first up and then down, flow of flue gas direction of the present invention gets on, get off, namely flow of flue gas (dedusting) is divided into following three phases: 1, the flue gas decline stage: flue gas declines from described back-end ductwork top, through economizer and the second air preheater; 2, in the dedusting stage: be upwards folded to the position of flowing at flue gas from level, flue gas enters deduster, after deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer; 3, flue gas ascent stage: the flue gas through dust removal process rises bottom described back-end ductwork, discharges from described back-end ductwork top through economizer and the first air preheater.Solve horizontal bundled tube economizer dust stratification problem.
Further, the position of flowing is upwards folded to from level at flue gas, arrange deduster, the first flue-dust retainer is arranged below this deduster, for ensureing the negative pressure of boiler at this flue-dust retainer position, prevent cold wind from leaking into boiler, regularly take dust stratification out of simultaneously, also bottom flue-dust retainer, be provided with water seal scraper plate Machine for cleaning-out ash simultaneously, after flue dust enters deduster along back-end ductwork, flue dust is under the effect of rotary centrifugal force, separated from flue gas, and then fall under gravity in flue-dust retainer, reach the effect of initial dedusting, the present invention passes through at back-end ductwork internal placement deduster, thus improve biomass boiler from dust collection capacity.
The embodiment of the invention also discloses a kind of biomass boiler, specifically can comprise: feeding system, the combustion furnace be connected with described feeding system, and, with the back-end ductwork be connected of described combustion furnace: described back-end ductwork adopts U-shaped layout, flue gas after described back-end ductwork top drops to bottom, then rises to top by bottom; Described back-end ductwork can comprise: be arranged in described back-end ductwork flue gas is upwards folded to the position of flowing deduster from level, be arranged in the first flue-dust retainer below described deduster after deduster is separated flue dust from flue gas, flue dust drops in flue-dust retainer, is positioned at one or more economizers of the position that flue gas flows from bottom to top; And, the first air preheater above the economizer being positioned at the position that described flue gas flows from bottom to top.
In embodiments of the present invention, described biomass boiler can also comprise: be arranged in described back-end ductwork flue gas is upwards folded to the position of flowing deduster from level, and, be positioned at the first flue-dust retainer below described deduster; After deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer.
As a kind of preferred exemplary of specific implementation of the present invention, described deduster can adopt and axially enter type multi-pipe china dust removing device.
In one preferred embodiment of the invention, described biomass boiler can also comprise: be positioned at the water seal scraper plate Machine for cleaning-out ash bottom described flue-dust retainer.
In specific implementation, described biomass boiler can also comprise: the one or more economizers being arranged in the position that back-end ductwork flue gas flows from top to bottom, and, at the second air preheater of the below of the position that described flue gas flows from top to bottom.
In one preferred embodiment of the invention, described biomass boiler can also comprise: be positioned at the unloading valve below described second air preheater.
In a particular application, the dedusting stage of described biomass boiler can comprise the steps:
The flue gas decline stage: flue gas declines from described back-end ductwork top, through economizer and the second air preheater;
In the dedusting stage: be upwards folded to the position of flowing at flue gas from level, flue gas enters deduster, after deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer;
Flue gas ascent stage: the flue gas through dust removal process rises bottom described back-end ductwork, discharges from described back-end ductwork top through economizer and the first air preheater.
For the embodiment of biomass boiler, due to itself and back-end ductwork embodiment basic simlarity, so description is fairly simple, relevant part illustrates see the part of unit embodiment.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
Above to the back-end ductwork of a kind of biomass boiler provided by the present invention, and, a kind of biomass boiler is described in detail, apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (2)
1. a back-end ductwork for biomass boiler, is characterized in that, described back-end ductwork adopts U-shaped layout, and flue gas after described back-end ductwork top drops to bottom, then rises to top by bottom;
Described back-end ductwork comprises:
Be arranged in described back-end ductwork flue gas is upwards folded to the position of flowing deduster from level, and, be positioned at the first flue-dust retainer below described deduster; After deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer; Described deduster is for axially entering type multi-tube dust cleaner; Described first flue-dust retainer is pyramid;
Be positioned at one or more economizers of the position that flue gas flows from bottom to top;
And,
The first air preheater above the economizer being positioned at the position that described flue gas flows from bottom to top;
Be positioned at the water seal scraper plate Machine for cleaning-out ash bottom described first flue-dust retainer;
Be positioned at one or more economizers of the position that flue gas flows from top to bottom;
And,
At the second air preheater of the below of the position that described flue gas flows from top to bottom;
Be positioned at described flue gas to flow from top to bottom second flue-dust retainer of bottom position; Described second flue-dust retainer is pyramid;
And,
Be positioned at the unloading valve below described second flue-dust retainer;
When adopting the back-end ductwork of described biomass boiler to carry out dedusting, comprise with the next stage:
The flue gas decline stage: flue gas declines from described back-end ductwork top, through economizer and the second air preheater;
In the dedusting stage: be upwards folded to the position of flowing at flue gas from level, flue gas enters deduster, after deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer;
Flue gas ascent stage: the flue gas through dust removal process rises bottom described back-end ductwork, discharges from described back-end ductwork top through economizer and the first air preheater.
2. a biomass boiler, it is characterized in that, comprise feeding system, the combustion furnace be connected with described feeding system, and, with the back-end ductwork be connected of described combustion furnace: described back-end ductwork adopts U-shaped layout, and flue gas, after described back-end ductwork top drops to bottom, then rises to top by bottom;
Described back-end ductwork comprises:
Be arranged in described back-end ductwork flue gas is upwards folded to the position of flowing deduster from level, and, be positioned at the first flue-dust retainer below described deduster; After deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer; Described deduster is for axially entering type multi-tube dust cleaner; Described first flue-dust retainer is pyramid;
Be positioned at one or more economizers of the position that flue gas flows from bottom to top;
And,
The first air preheater above the economizer being positioned at the position that described flue gas flows from bottom to top;
Be positioned at the water seal scraper plate Machine for cleaning-out ash bottom described first flue-dust retainer;
Described back-end ductwork also comprises:
Be positioned at one or more economizers of the position that flue gas flows from top to bottom;
And,
At the second air preheater of the below of the position that described flue gas flows from top to bottom;
Be positioned at described flue gas to flow from top to bottom second flue-dust retainer of bottom position; Described second flue-dust retainer is pyramid;
And,
Be positioned at the unloading valve below described second flue-dust retainer;
The dedusting stage of described biomass boiler comprises the steps:
The flue gas decline stage: flue gas declines from described back-end ductwork top, through economizer and the second air preheater;
In the dedusting stage: be upwards folded to the position of flowing at flue gas from level, flue gas enters deduster, after deduster is separated flue dust from flue gas, flue dust drops in the first flue-dust retainer;
Flue gas ascent stage: the flue gas through dust removal process rises bottom described back-end ductwork, discharges from described back-end ductwork top through economizer and the first air preheater.
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| CN201310138574.0A CN103234211B (en) | 2013-04-19 | 2013-04-19 | Carry the biomass boiler of one-level ceramic multi-tube cyclone dust removal |
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| CN201310138574.0A CN103234211B (en) | 2013-04-19 | 2013-04-19 | Carry the biomass boiler of one-level ceramic multi-tube cyclone dust removal |
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| CN102878569A (en) * | 2012-09-19 | 2013-01-16 | 浙江大学 | High-temperature air combustion intensifying device and method applicable to low heating value mixed garbage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE10227639B4 (en) * | 2002-06-20 | 2006-06-22 | Steag Encotec Gmbh | coal-fired power station |
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| CN2087099U (en) * | 1991-03-25 | 1991-10-23 | 牛利杰 | Air locking and dust collecting device for cyclone type dust remover |
| CN2724846Y (en) * | 2004-03-16 | 2005-09-14 | 唐少华 | Multiple pipe dust-remover with series of ceramic core-tubes |
| CN201412857Y (en) * | 2009-06-09 | 2010-02-24 | 青岛威特水煤浆技术开发有限公司 | Cold ash hopper-type ash remover of water-coal-slurry boiler |
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| CN102878569A (en) * | 2012-09-19 | 2013-01-16 | 浙江大学 | High-temperature air combustion intensifying device and method applicable to low heating value mixed garbage |
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|---|---|
| CN103234211A (en) | 2013-08-07 |
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