CN108413431A - Boiler oil pretreatment unit and boiler - Google Patents
Boiler oil pretreatment unit and boiler Download PDFInfo
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- CN108413431A CN108413431A CN201810295450.6A CN201810295450A CN108413431A CN 108413431 A CN108413431 A CN 108413431A CN 201810295450 A CN201810295450 A CN 201810295450A CN 108413431 A CN108413431 A CN 108413431A
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- reaction tube
- boiler
- pretreatment unit
- tube
- pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K5/00—Feeding or distributing other fuel to combustion apparatus
- F23K5/002—Gaseous fuel
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The present invention relates to a kind of boiler oil pretreatment unit and boilers, wherein boiler oil pretreatment unit includes reaction tube, separation bend pipe, the first delivery pipe and the second delivery pipe, reaction tube is equipped with fuel inlet, fuel is entered by fuel inlet carries out imperfect combustion in reaction tube, separation bend pipe is arranged in the downstream of reaction tube, separation bend pipe is used to carry out gas solid separation to the combustion product that fuel generates in reaction tube, first delivery pipe is connected to the side of separation bend pipe to concave, and for the gas isolated to be sent into boiler furnace；Second delivery pipe is connected to the side of the convex of separation bend pipe, and for the solid isolated to be sent into burner hearth.The separation principle of combustion product is the separation using separation bend pipe gas and solid in the stalling characteristic of corner and by the effect realization combustion product of centrifugal force in the present invention, and then gas and solid are respectively delivered in burner hearth, this separated structure is simple, operation and maintenance cost are relatively low, convenient for promoting.
Description
Technical field
The present invention relates to boiler oil field of combustion technology more particularly to a kind of boiler oil pretreatment units and boiler.
Background technology
According to《Implement in full coal-burning power plant's minimum discharge and reducing energy consumption programme of work》Requirement, the whole nation all has item
The coal-burning power plant of part will realize that minimum discharge, the wherein concentration of emission of nitrogen oxides are not higher than 50mg/m in the year two thousand twenty3.Mesh
Before, most domestic power plant is all made of tail portion SCR denitration technology to reduce the discharge of pollutant, needs to pay every year using the technology
Huge SCR denitration operation and maintenance cost, whole economic efficiency are bad；Meanwhile downstream sky is easy to cause using SCR denitration system
The corrosion and blocking of air preheater, influence the safety of boiler controller system；Moreover, the secondary dirt that SCR catalyst and the escaping of ammonia are brought
Dye is also unable to get effective solution.
To realize that minimum discharge, current universally recognized technology path are that will have been given birth to by spraying into reducing gas into stove
At NOxIt is reduced to N2, to realize NOxMinimum discharge, reduce corrosion and block, reduce secondary pollution.Although natural gas reburning
NO can effectively be reducedxConcentration, emission reduction rate is up to 70%, but existing coal gasification apparatus is complicated, and operating cost is high, inconvenient
In popularization, how to obtain to meet at low cost and fire the reducibility gas of share again as current maximum problem.
It should be noted that the information for being disclosed in background of invention part is merely intended to increase the totality to the present invention
The understanding of background, and be not construed as recognizing or imply in any form the information constitute by those skilled in the art public affairs
The prior art known.
Invention content
The purpose of the present invention is to propose to a kind of boiler oil pretreatment unit and boilers, are produced to preprocessing process with realizing
The separation of raw combustion product, and support is provided for the different location that the gas after detaching and solid are respectively fed to burner hearth, to the greatest extent
The structure for possibly simplifying boiler oil pretreatment unit, reduces operation and maintenance cost.
To achieve the above object, the present invention provides a kind of boiler oil pretreatment unit, including reaction tube, separation are curved
Pipe, the first delivery pipe and the second delivery pipe, reaction tube are equipped with fuel inlet, and fuel, which is entered by fuel inlet in reaction tube, to carry out
The burning for being used to generate fuel in reaction tube in the downstream of reaction tube, separation bend pipe is arranged in imperfect combustion, separation bend pipe
Product carries out gas solid separation, and the first delivery pipe is connected to the side of separation bend pipe to concave, and for that will pass through separation bend pipe
The gas isolated is sent into boiler furnace；Second delivery pipe is connected to the side of the convex of separation bend pipe, and for that will pass through
The solid that separation bend pipe is isolated is sent into burner hearth.
Further, reaction tube is horizontally disposed；Alternatively, reaction tube is arranged vertically.
Further, the first delivery pipe includes that the first pipeline section and horizontally disposed of arrangement is tilted upward along airflow direction
Two pipeline sections, the first pipeline section are connected to bend pipe connection, the second pipeline section is detached with the first pipeline section.
Further, the second delivery pipe includes the third pipeline section arranged diagonally downward along airflow direction and horizontally disposed
Four pipeline sections, third pipeline section are connected to bend pipe connection, the 4th pipeline section is detached with third pipeline section.
Further, boiler oil pretreatment unit further includes accelerating tube, and the intake area of accelerating tube, which is more than, to be accelerated
The exit area of pipe, accelerating tube are connected to reaction tube and detach between bend pipe.
Further, boiler oil pretreatment unit further includes inlet tube, and inlet tube is connected to the fuel inlet of reaction tube,
The area of section of reaction tube is bigger than the area of section of inlet tube.
Further, the ratio between area of section of the area of section of reaction tube and inlet tube is 3~15.5.
Further, inlet tube is different from the arranged direction of reaction tube, and connecting bend is equipped between inlet tube and reaction tube.
Further, boiler oil pretreatment unit further includes deceleration tube, and the intake area of deceleration tube, which is less than, to slow down
The exit area of pipe, deceleration tube are connected between connecting bend and reaction tube.
Further, inlet tube is horizontally disposed, and reaction tube is arranged vertically.
Further, boiler oil pretreatment unit further includes heat source, and heat source is for lighting fuel.
To achieve the above object, the present invention also provides a kind of boiler, including burner hearth and boiler oil pretreatment unit, pots
Stove fuel Pretreater apparatus uses above-mentioned boiler oil pretreatment unit, the first delivery pipe and the second delivery pipe to connect with burner hearth
It is logical.
Further, the angle between the axis and vertical line of reaction tube is 0 °~30 °, and separation bend pipe is arranged in reaction tube
Lower section, boiler oil pretreatment unit further includes diversion pipe, and diversion pipe is connected to the upstream of separation bend pipe, and diversion pipe is along remote
Direction from burner hearth extends.
Further, diversion pipe and/or separation bend pipe are in tilted layout relative to vertical line.
Further, the upper layer spout connection of the first delivery pipe and primary zone in burner hearth；Alternatively, the first delivery pipe and burner hearth
Interior reducing zone connection；Alternatively, the first delivery pipe is connected to the upper area of burning-out zone in burner hearth.
Further, the second delivery pipe is connected to the primary zone in burner hearth.
Based on the above-mentioned technical proposal, the embodiment of the present invention can be such that fuel is carried out in reaction tube by the way that reaction tube is arranged
Imperfect combustion realizes the pretreatment to fuel；By setting detach bend pipe, can to fuel combustion generate combustion product into
Row gas solid separation；By the way that the first delivery pipe and the second delivery pipe is arranged, the gas obtained after separation and solid can be sent respectively
Enter burner hearth, the different location for gas and solid to be respectively fed to burner hearth provides support.Wherein, the separation principle of combustion product
It is to realize gas and solid in combustion product using stalling characteristic of the separation bend pipe in corner and the effect by centrifugal force
Separation, and then gas and solid is respectively delivered in burner hearth, relatively simple for structure used by this separate mode, operation and
Maintenance cost is relatively low, can simplify the overall structure of boiler oil pretreatment unit, reduce cost, convenient for promoting.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is the structural schematic diagram of boiler one embodiment of the present invention.
Fig. 2 is the structural schematic diagram of another embodiment of boiler of the present invention.
In figure：
1, inlet tube；2, heat source；3, reaction tube；4, accelerating tube；5, diversion pipe；6, bend pipe is detached；7, the first delivery pipe；8、
Second delivery pipe；9, connecting bend；10, deceleration tube.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, is clearly and completely retouched to the technical solution in embodiment
It states.Obviously, described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this hair
Bright embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term "center", " transverse direction ", " longitudinal direction ", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as pair
The limitation of the scope of the present invention.
As shown in Figure 1, in an illustrative examples of boiler oil pretreatment unit provided by the present invention, the pot
Stove fuel Pretreater apparatus includes that reaction tube 3, separation bend pipe 6, the first delivery pipe 7 and the second delivery pipe 8, reaction tube 3 are equipped with combustion
Expect import, fuel is entered by fuel inlet carries out imperfect combustion in reaction tube 3.In reaction tube 3, it can complete to fuel
Preprocessing process, CH can be generated by imperfect combustion4、H2, the reducibility gas such as CO, these reducibility gas are passed through
It can be to NO caused by burner hearth fuel combustion in burner hearthxIt is restored, realizes boiler NOxLow emission.This mode can be real
Self-sufficient, the low cost acquisition reducibility gas of existing reducibility gas.
There are gas and solid in the combustion product generated after imperfect combustion by fuel, to ensure to be passed through in burner hearth
Gas purity, and residual fuel is made fully to burn, reduces waste of fuel, be additionally provided in boiler oil pretreatment unit point
From device, to be detached to gas and solid.Separator includes separation bend pipe 6, the first delivery pipe 7 and the second delivery pipe 8, separation
Bend pipe 6 is arranged in the downstream of reaction tube 3, and separation bend pipe 6, which has, to turn round, can by separation bend pipe 6 in the stalling characteristic of corner
Gas solid separation is carried out to the combustion product that fuel generates in reaction tube 3, the first delivery pipe 7 is connected to the inside of separation bend pipe 6
Recessed side, and for boiler furnace will to be sent by detaching the gas that bend pipe 6 is isolated；Second delivery pipe 8 is connected to separation
The side of the convex of bend pipe 6, and for burner hearth will to be sent by detaching the solid that bend pipe 6 is isolated.
Bend pipe 6, the first delivery pipe 7 and the second delivery pipe 8 are detached by setting, for gas and solid are respectively fed to burner hearth
Different location provide support.In an alternate embodiment of the invention, reducibility gas and semicoke are may separate out by detaching bend pipe 6,
Reducibility gas is sent into the corresponding position of burner hearth, the NO that can be generated to stove chamber inner combustionxIt is restored, reduces NOxDischarge；It will
Semicoke is sent into the corresponding position of burner hearth, semicoke can be made fully to be burnt, and improves fuel availability, reduces waste.
In above-mentioned illustrative examples, the separation principle of combustion product is the separation spy using separation bend pipe in corner
Property and pass through the effect of centrifugal force and realize the separation of gas and solid in combustion product, and then gas and solid are respectively delivered to
Relatively simple for structure used by this separate mode in burner hearth, operation and maintenance cost are relatively low, and it is pre- can to simplify boiler oil
The overall structure of processing unit, reduces cost, convenient for promoting.
In boiler oil pretreatment unit embodiment provided by the present invention, reaction tube 3 can be horizontally disposed, can also
Vertical arrangement.
Optionally, the first delivery pipe 7 includes that the first pipeline section and horizontally disposed of arrangement is tilted upward along airflow direction
Two pipeline sections, the first pipeline section are connected to bend pipe 6 is detached, and the second pipeline section is connected to the first pipeline section.Setting can facilitate gas in this way
Conveying makes gas more swimmingly enter the first delivery pipe 7.
Optionally, the second delivery pipe 8 includes the third pipeline section arranged diagonally downward along airflow direction and horizontally disposed
Four pipeline sections, third pipeline section are connected to bend pipe 6 is detached, and the 4th pipeline section is connected to third pipeline section.Setting can be with easy solid in this way
Conveying makes solid more swimmingly enter the second delivery pipe 8.
As shown in Figure 1, boiler oil pretreatment unit further includes accelerating tube 4, the intake area of accelerating tube 4, which is more than, to be added
The exit area of fast pipe 4, accelerating tube 4 are connected to reaction tube 3 and detach between bend pipe 6.It, can be with by the way that accelerating tube 4 is arranged
The flow velocity for improving air-flow, allows the air-flow in 3 exit of reaction tube to be quickly discharged, prevents accumulated powder slagging.
In embodiment as depicted in figs. 1 and 2, boiler oil pretreatment unit includes level-one accelerating tube 4.In other realities
It applies in example, the accelerating tube 4 of two-stage or two-stage or more can be set.
Optionally, boiler oil pretreatment unit further includes inlet tube 1, and inlet tube 1 and the fuel inlet of reaction tube 3 connect
Logical, the area of section of reaction tube 3 is bigger than the area of section of inlet tube 1.Setting can make air-flow laggard by inlet tube 1 in this way
Enter in the larger reaction tube 3 of cross-sectional area, extend reaction time of the fuel in reaction tube 3, improves in reaction tube 3 on cross section
The uniformity of Temperature Distribution can also effectively avoid the accumulated powder clogging problems in reaction tube 3.
Optionally, the ratio between the area of section of reaction tube 3 and the area of section of inlet tube 1 (being known as ratio) are 3~15.5.
Ratio is set as 3~15.5, coal dust firing can be made more to stablize, Temperature Distribution is more uniform, 3 inside smoke of reaction tube
Mean temperature up to 900~1500 DEG C, coal dust can be made to be pyrolyzed rapidly, gasify, generate a large amount of reducibility gas, realize NOx
Minimum discharge；It can also facilitate installation by the cross-sectional area of reaction tube 3 and length control in reasonable range, effectively control
This is made.
When ratio is less than 3, in order to ensure residence time of the fuel in reaction tube 3, meet pyrolysis and gasification reaction
Requirement, generate enough reducibility gas, need lengthen reaction tube 3 length, can thus improve to boiler space layout
Requirement, bring bigger difficulty to the installation of boiler single unit system, and the length itself for increasing reaction tube 3 is also brought along into
It is the problem of this increase, less economical；When ratio be more than 15.5 when, the cross-sectional area of reaction tube 3 is too big, can also face space,
The problem of in terms of installation and cost.
Optionally, as shown in Fig. 2, inlet tube 1 is different from the arranged direction of reaction tube 3, between inlet tube 1 and reaction tube 3
Equipped with connecting bend 9.By the way that connecting bend 9 is arranged, the arranged direction of inlet tube 1 and reaction tube 3 can be made there are more more options, carried
High property easy for installation.By the way that connecting bend 9 is arranged, the concentration effect of elbow can also be utilized to improve ignition effectiveness, improve boiler
Adaptability of the fuel Pretreater apparatus to different operating modes and different types of coal.
Deflector can be set in connecting bend 9, to realize preferable water conservancy diversion effect.
Optionally, inlet tube 1 is horizontally disposed, and reaction tube 3 is arranged vertically.Can make in this way fuel in the horizontal direction enter into
In mouth pipe 1, the conveying of convenient fuel；And reaction tube 3 is arranged vertically, can effectively prevent fuel gas stream accumulated powder in reaction tube 3
Slagging.
Further, boiler oil pretreatment unit further includes deceleration tube 10, and the intake area of deceleration tube 10 is less than
The exit area of deceleration tube 10, deceleration tube 10 are connected between connecting bend 9 and reaction tube 3.By the way that deceleration tube 10 is arranged,
The vortex that Initial Stage after Ignition can be eliminated is conducive to the stabilization of diffusion and the burning of flame.
In addition, boiler oil pretreatment unit further includes heat source 2, heat source 2 is for lighting fuel.Combustion may be used in heat source 2
The device of primary wind and powder can be lighted or be heated to burner, plasma igniting, grease gun igniting, air gun igniting, high temperature air etc..
Optionally, heat source 2 along reaction tube 3 radial arrangement or be obliquely installed relative to horizontal direction.
Optionally, heat source 2 is arranged at connecting bend 9, by the concentration effect of connecting bend 9 convenient for igniting.By setting
Heat source 2 is set, can be that fuel combustion (such as pulverized coal pyrolysis, gasification reaction) provides stable, reliable burning things which may cause a fire disaster.
Optionally, heat source 2 includes at least two-stage combustion cylinder.Using two-stage or multistage combustion cylinder, can be increased by fractional combustion
Strong ignition performance makes flame combustion more stablize, and by reasonably selecting firing power, can expand boiler oil pretreatment unit
To the scope of application of operating mode and coal.
Optionally, the power adjustable of heat source 2.By adjusting the power of heat source 2, the igniting that can adjust primary wind and powder is strong
Degree to control the combustion intensity inside boiler oil pretreatment unit, and then realizes the purpose of control temperature, effectively prevent filling
Set internal overtemperature, slagging.
Boiler oil pretreatment unit embodiment provided by the present invention is also used as low NO use.
The present invention also provides a kind of boiler, which includes burner hearth and boiler oil pretreatment unit, and boiler oil is pre-
Processing unit uses the boiler oil pretreatment unit in above-mentioned each embodiment, the first delivery pipe 7 and the second delivery pipe 8 with
Burner hearth is connected to.
Optionally, the angle between the axis and vertical line of reaction tube 3 is 0 °~30 °, can make reaction tube 3 whole in this way
It is substantially arranged vertically, the benefit being arranged so is the accumulated powder slagging it is possible to prevente effectively from reaction tube 3.
Separation bend pipe 6 is arranged in the lower section of reaction tube 3, and boiler oil pretreatment unit further includes diversion pipe 5, diversion pipe 5
It is connected to the upstream of separation bend pipe 6, diversion pipe 5 extends along the direction far from burner hearth.Since separation bend pipe 6 finally needs to divide
The gas and solid separated out is sent into burner hearth, therefore detaches bend pipe 6 and extend along close to the direction of burner hearth.By the way that diversion pipe 5 is arranged,
Air-flow can be made first to flow to the direction far from burner hearth along diversion pipe 5, then enter back into separation bend pipe 6 and detached, in this way
The bend pipe effect in separation bend pipe 6 can be increased, improve separating effect.
Optionally, diversion pipe 5 and/or separation bend pipe 6 are in tilted layout relative to vertical line.Setting can make air-flow stream in this way
It is logical more smooth, unnecessary flow perturbation or vortex are reduced, burning and conveying effect are influenced.
Optionally, diversion pipe 5 and/or separation bend pipe 6 guide air-flow diagonally downward.
In boiler embodiments, there are many modes for the position of the first delivery pipe 7 and the second delivery pipe 8, according to boiler
Structure and NOxEmission level, the installation site of the first delivery pipe 7 and the second delivery pipe 8 can be flexibly set, keep boiler real
Existing minimum discharge.Optionally, the upper layer spout connection of the first delivery pipe 7 and primary zone in burner hearth；Alternatively, the first delivery pipe 7 with
Reducing zone connection in burner hearth；Alternatively, the first delivery pipe 7 is connected to the upper area of burning-out zone in burner hearth.Wherein preferably,
One delivery pipe 7 is connected to the reducing zone in burner hearth, it can be achieved that preferably reduction effect, effectively reduces NOxDischarge.
Optionally, the second delivery pipe 8 is connected to the primary zone in burner hearth.In this way can the remaining product of burning (such as
Semicoke) be sent into burner hearth continue to burn.
Positive technique effect possessed by boiler oil pretreatment unit is equally applicable to boiler in above-mentioned each embodiment,
Which is not described herein again.
With reference to Fig. 2 to the concrete structure and work of one embodiment of boiler oil pretreatment unit of the present invention and boiler
It is illustrated as principle：
By taking boiler oil is coal dust as an example, as shown in Fig. 2, boiler oil pretreatment unit includes mainly inlet tube 1, heat source
2, reaction tube 3, accelerating tube 4, diversion pipe 5, separation bend pipe 6, the first delivery pipe 7, the second delivery pipe 8, connecting bend 9 and deceleration tube
10。
Wherein, inlet tube 1 is horizontally disposed, and deceleration tube 10, reaction tube 3 and accelerating tube 4 are arranged vertically, reaction tube 3 it is transversal
The ratio between area and the cross-sectional area of inlet tube 1 are 3~15.5.The setting of accelerating tube 4 can improve the stream of 3 spout flue gas of reaction tube
Speed.It detaches bend pipe 6 to detach using elbow, makes full use of high-speed flow and elbow effect to detach combustion gas and semicoke, structure
Simply, resistance is smaller.With the first delivery pipe 7 of the side connection to concave for detaching bend pipe 6 for conveying gas, gas is led to
Enter the reducing zone of boiler furnace, the generated NO of drastic reductionx；It is defeated with the second of the side for the convex for detaching bend pipe 6 connection
It send pipe 8 for conveying solid substance, uncombusted semicoke is passed through to the primary zone of boiler furnace, ensure the abundant after-flame of coal dust.Inlet tube 1
It is connected to by connecting bend 9 between deceleration tube 10, heat source 2 is located at the inside of connecting bend 9 and deceleration tube 10, connecting bend 9
With concentration effect, be conducive to pulverized coal ignition.
At work, primary wind and powder enters in inlet tube 1, and by the concentration effect of connecting bend 9, coal dust is in connecting bend
It is gathered at 9, the wind powder mixture of heat source 2 point fire coal and air makes input by part coal dust firing heat release in reaction tube 3
Coal dust pyrolysis, gasification reaction occurs, the flow velocity of combustion product is improved through at least level-one accelerating tube 4, avoids accumulated powder in pipeline
And slagging, guide functions of the combustion product through diversion pipe 5 after flow velocity promotion enter separation bend pipe 6 and are detached, then passed through
Reducibility gas and semicoke are transported to burner hearth by the first delivery pipe 7 and the second delivery pipe 8 respectively.
Wherein, primary wind and powder directly fully enters reaction tube without air-coal separating, and coal dust treating capacity is big, reproducibility production
Object is more, realizes inexpensive, low energy consumption gas processed；Heat source 2 provides stable, reliable burning things which may cause a fire disaster for pyrolysis, the gasification of coal dust；Instead
Should pipe 3 use big ratio, and vertical installation, both can extend the reaction time, and improve the Temperature Distribution on cross section of reaction tube 3
Uniformity, and can effectively avoid accumulated powder, slagging in reaction tube 3；In the reaction tube 3 after burning, can simply, at low cost,
Obtain to low energy consumption a large amount of CH4、H2, the reducibility gas, wherein H such as CO2For 6~15%, CH4For 0.5~5%, CO be 8~
20%, these gases are sprayed into burner hearth, it can be to NOxDrastic reduction is carried out, boiler export NO is madexA concentration of 0 or tend to 0, realize
Boiler NOxMinimum discharge.
Pass through the explanation to boiler oil pretreatment unit of the present invention and multiple embodiments of boiler, it can be seen that the present invention
Boiler oil pretreatment unit and boiler embodiments at least have the advantages that one or more of：
1, separation bend pipe utilizes bend pipe stalling characteristic, by combustion product gas and solid detach, and it is defeated by first
Send pipe and the second delivery pipe that can respectively be conveyed to gas and solid, for gas and solid are delivered to burner hearth not respectively
Support is provided with position；
2, the ratio of reaction tube is 3~15.5, and vertical installation, and the stability of reaction not only can be improved, can also extend
Reaction time, and solve the problems, such as accumulated powder in reaction tube, slagging；
3, it is connected with accelerating tube between reaction tube and diversion pipe, the flow velocity of spout flue gas can be improved, can avoid blocking, product
, also there is humidification in the problems such as powder, slagging to the gas solid separation in downstream；
4, it is equipped with connecting bend between inlet tube and reaction tube, coal dust is conducive to by the localized concentrations effect of connecting bend
Igniting, accommodation of the expansion instrument to coal quality and operating mode；
5, it is equipped with deceleration tube between connecting bend and reaction tube, the vortex of Initial Stage after Ignition can be eliminated, be conducive to the expansion of flame
Scattered and flameholding；
6, boiler oil pretreatment unit overall structure is simple, easy to transform, and operating cost is relatively low, is carried out to primary wind and powder
A large amount of reducibility gas that pretreatment generates can be injected directly into burner hearth, so that boiler is realized NO by burning in stovexMinimum discharge, with
SCR system compares remarkable in economical benefits, and avoids the secondary pollutions such as waste catalyst and the escaping of ammonia, in NOxUltra-clean discharge
Field has good application prospect.
Finally it should be noted that：The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
It can modify to the specific implementation mode of the present invention or equivalent replacement is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (16)
1. a kind of boiler oil pretreatment unit, which is characterized in that including reaction tube (3), separation bend pipe (6), the first delivery pipe
(7) and the second delivery pipe (8), the reaction tube (3) are equipped with fuel inlet, and fuel enters the reaction by the fuel inlet
It manages and carries out imperfect combustion in (3), the separation bend pipe (6) is arranged in the downstream of the reaction tube (3), the separation bend pipe
(6) it is used to carry out gas solid separation to the combustion product that fuel generates in the reaction tube (3), first delivery pipe (7) is even
It is connected on the side of the separation bend pipe (6) to concave, and for will be sent by the gas that the separation bend pipe (6) is isolated
Boiler furnace；Second delivery pipe (8) is connected to the side of the convex of the separation bend pipe (6), and for that will pass through institute
It states the solid that separation bend pipe (6) is isolated and is sent into the burner hearth.
2. boiler oil pretreatment unit according to claim 1, which is characterized in that the reaction tube (3) is horizontally disposed；
Alternatively, the reaction tube (3) is arranged vertically.
3. boiler oil pretreatment unit according to claim 1, which is characterized in that first delivery pipe (7) includes
Tilt upward the first pipeline section of arrangement and horizontally disposed second pipeline section along airflow direction, first pipeline section with it is described detach it is curved
(6) connection is managed, second pipeline section is connected to first pipeline section.
4. boiler oil pretreatment unit according to claim 1, which is characterized in that second delivery pipe (8) includes
The third pipeline section and horizontally disposed 4th pipeline section arranged diagonally downward along airflow direction, the third pipeline section with it is described detach it is curved
(6) connection is managed, the 4th pipeline section is connected to the third pipeline section.
5. boiler oil pretreatment unit according to claim 1, which is characterized in that the boiler oil pretreatment unit
Further include accelerating tube (4), the intake area of the accelerating tube (4) is more than the exit area of the accelerating tube (4), institute
It states accelerating tube (4) and is connected to the reaction tube (3) and detached between bend pipe (6) with described.
6. boiler oil pretreatment unit according to claim 1, which is characterized in that the boiler oil pretreatment unit
Further include inlet tube (1), the inlet tube (1) is connected to the fuel inlet of the reaction tube (3), and the reaction tube (3) is cut
Face area is bigger than the area of section of the inlet tube (1).
7. boiler oil pretreatment unit according to claim 6, which is characterized in that the section face of the reaction tube (3)
The ratio between product and the area of section of the inlet tube (1) are 3~15.5.
8. boiler oil pretreatment unit according to claim 6, which is characterized in that the inlet tube (1) with it is described anti-
The arranged direction that (3) should be managed is different, and connecting bend (9) is equipped between the inlet tube (1) and the reaction tube (3).
9. boiler oil pretreatment unit according to claim 8, which is characterized in that the boiler oil pretreatment unit
Further include deceleration tube (10), the intake area of the deceleration tube (10) is less than the outlet face of the deceleration tube (10)
Product, the deceleration tube (10) are connected between the connecting bend (9) and the reaction tube (3).
10. boiler oil pretreatment unit according to claim 6, which is characterized in that the horizontal cloth of the inlet tube (1)
It sets, the reaction tube (3) is arranged vertically.
11. boiler oil pretreatment unit according to claim 1, which is characterized in that the boiler oil pretreatment dress
It further includes heat source (2) to set, and the heat source (2) is for lighting the fuel.
12. a kind of boiler, which is characterized in that including burner hearth and boiler oil pretreatment unit, the boiler oil pretreatment dress
It sets using such as claim 1~11 any one of them boiler oil pretreatment unit, first delivery pipe (7) and described the
Two delivery pipes (8) are connected to the burner hearth.
13. boiler according to claim 12, which is characterized in that between the axis and vertical line of the reaction tube (3)
Angle is 0 °~30 °, and the separation bend pipe (6) is arranged in the lower section of the reaction tube (3), the boiler oil pretreatment unit
Further include diversion pipe (5), the diversion pipe (5) is connected to the upstream of the separation bend pipe (6), and the diversion pipe (5) is along remote
Direction from the burner hearth extends.
14. boiler according to claim 13, which is characterized in that the diversion pipe (5) and/or the separation bend pipe (6)
It is in tilted layout relative to vertical line.
15. boiler according to claim 12, which is characterized in that first delivery pipe (7) and main combustion in the burner hearth
The upper layer spout connection in area；Alternatively, first delivery pipe (7) is connected to the reducing zone in the burner hearth；Alternatively, described first
Delivery pipe (7) is connected to the upper area of burning-out zone in the burner hearth.
16. boiler according to claim 12, which is characterized in that second delivery pipe (8) and the master in the burner hearth
Fire area's connection.
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Cited By (1)
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| CN111298522A (en) * | 2020-03-31 | 2020-06-19 | 西北工业大学 | Separation device and method for metal powder condensed phase combustion products |
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| CN108413431B (en) | 2023-09-22 |
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