CN206073106U - A kind of controllable erosion system for cleaning boiler heating surface - Google Patents
A kind of controllable erosion system for cleaning boiler heating surface Download PDFInfo
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- CN206073106U CN206073106U CN201621046918.0U CN201621046918U CN206073106U CN 206073106 U CN206073106 U CN 206073106U CN 201621046918 U CN201621046918 U CN 201621046918U CN 206073106 U CN206073106 U CN 206073106U
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Abstract
The utility model discloses a kind of controllable erosion system for cleaning boiler heating surface, specifically a kind of that the system that the grains of sand carry out erosion cleaning to boiler heating surface by the mouth feeding burner hearth that sandblasts of diverse location as sootblowing dielectric is carried by the use of flowing gas；After main burning area, easily there is the boiler wall before the heating surface that slagging scorification is stain and some groups of mouths that sandblast are installed, the mouth that sandblasts avoids high temperature main burning area, flow velocity and the adjustable sootblowing dielectric of grains of sand content are sprayed into burner hearth, the grains of sand are made not melt and flow inside whole burner hearth, with the slagging scorification of certain speed and angle erosion boiler heating surface and dust stratification layer；This utility model utilizes erosion effect and abrasive action of the grains of sand to slagging scorification on boiler heating surface and dust stratification, the slagging scorification on heating surface and the abrasion of dust stratification layer are made, crushed, departed from, and using the good mobility of the grains of sand, each heating surface is flowed through with flue gas, timely and effective each heating surface can be cleaned without dead angle ground erosion.
Description
Technical field
This utility model is related to clean boiler heating surface technical field, and in particular to the grains of sand are sent by one kind using flowing gas
Enter burner hearth, controllably erosion heating surface, the system for cleaning boiler heating surface.
Background technology
China's thermal power generation based on coal, in coal-burning boiler operation, when temperature is received higher than the sweep of gases of ash fusion point
During hot face, the lime-ash melted in flue gas will adhere to and slagging scorification is formed on heating surface；When flue-gas temperature is less than ash fusion point, flying dust
Deposit to boiler heating surface and easily form dust stratification.Therefore, boiler heating surface slagging scorification dust stratification is generally existing in coal-burning boiler operation
Problem, it is especially even more serious when using the higher fire coal of alkali metal content (such as quasi- east coal).Boiler heating surface slagging scorification is accumulated
Ash can affect heat transfer coefficient, reduce boiler thermal output, causes high temperature corrosion and increase gaseous contaminant discharge, can lead when more serious
The operation of unit load down or blowing out are caused, or even causes the perils such as boiler tube bursting blast.
The predominantly organic tool rapping of cleaning mode of boiler heating surface, steam soot blowing, sonic soot blowing, fuel gas pulse ash blower, water
Rifle flushing cinder, steel ball deashing etc., but all have the shortcomings that certain.The mode of mechanical vibrator is limited due to the direction and region of rapping,
There is deashing dead angle；Steam soot blowing is to purge heating surface tube wall using continuous high steam, does not only exist serious mechanical parts
Abrasion also has substantial amounts of energy expenditure；The energy intensity of sonic soot blowing is not enough, limited to the cleaning capacity of dust stratification；Gas impulse blows
Ash produces shock wave cleaning heating surface using combustible gas deflagrating, is only used for low-temperature zone, is of limited application；Hydraulic giant flushing cinder skill
Art also needs the recovery and discharge for considering washing slag water.The soot blower system of station boiler typically first sets soot blower period simultaneously, according to
Expeced time periodically carries out deashing, but due to coal type change, the change of combustion case, actually required cleaning cycle often with
It is expected to refuse to obey, deashing deficiency or soot blowing overfrequency are often resulted in, the heat transfer efficiency of boiler heating surface is affected.
The content of the invention
In order to overcome the shortcomings of that existing ash-clearing technology is present, the technical problems to be solved in the utility model is just to provide one kind
For cleaning the controllable erosion system of boiler heating surface, the grains of sand are carried into boiler furnace using flowing gas, made in flue gas
The grains of sand of even distribution hard, by erosion and the abrasive action of the grains of sand, effectively remove slagging scorification and the dust stratification of boiler heating surface.
This utility model solves the technical scheme adopted by its technical problem：
A kind of controllable erosion system for cleaning boiler heating surface, including some groups of mouths that sandblast installed in boiler wall
4, be connected with the mouth 4 that sandblasts through some groups of sootblowing dielectric conveyance conduits 3 of boiler furnace wall, and with sootblowing dielectric delivery pipe
Road 3 connection particle delivery systems 1 it is gentle-granule mixing arrangement 2.
The mouth 4 that sandblasts along boiler wall vertical direction is equidistant or non-equidistant arrangement, or boiler top transversely and
Longitudinal direction is equidistant or non-equidistant is arranged.After the mouth that sandblasts is arranged on main burning area, before easily there is the heating surface that slagging scorification is stain, sandblast
The inner flue gas of the stove temperature range of mouthful installation site is：500～1200 DEG C.The installation site avoids flue-gas temperature upper zone,
Being softened or melted for the grains of sand under high temperature can be effectively prevented, while all can cover phenomenon temperature range is stain in easily there is lime-ash
Heating surface so that the solid particle with enough hardness constantly washes away and can form the heating surface surface for staiing bottom, so as to anti-
The constantly growth for only staiing layer is thickening.
The adjustable angle sandblasted between mouth 4 and boiler wall, the angular range between its axis and boiler wall be 10 °～
90 °, direction in stove is pointed to, and any direction can be pointed to as needed in the three dimensions in stove.
Controllable erosion method for cleaning the controllable erosion system of boiler heating surface described above, particle delivery systems 1
To gas-supply grains of sand of granule mixing arrangement 2, flowing gas enter gas-granule mixing arrangement 2 and carry the grains of sand as sootblowing dielectric,
Sootblowing dielectric is sent into boiler furnace by the mouth that sandblasts installed in diverse location via sootblowing dielectric conveyance conduit 3 and boiler is heated
Face is cleaned, with slagging scorification and the dust stratification of the sand dashed sand erosion boiler heating surface of flow of flue gas, make slagging scorification on heating surface and
The abrasion of dust stratification layer, broken, disengaging, prevent the constantly growth for staiing layer thickening, and the purging with reference to flowing gas is acted on, and is reached clear
The effect of clean boiler heating surface.
Secondary wind or the special compressed air that arrange of the flowing gas using boiler, the grains of sand are common little particle particle diameter
Solid particle, the flow velocity of sootblowing dielectric can be by the flow rate regulation of flowing gas, and in sootblowing dielectric, the content of the grains of sand is adjustable.
The grains of sand are the natural grains of sand, and the grains of sand that mainly desert of China northern territory, Gobi desert etc. are produced, the region are exactly height
The place of origin of contamination coal, when output high contamination coal, also can export the natural grains of sand nearby.Southern area can also make
With natural river sand and sea sand, the artificial grains of sand that artificial pulverizing building stones are formed can also be used.
Compared with prior art, this utility model has the advantage that：
1st, after multigroup mouth that sandblasts is arranged in main burning area, before easily there is the heating surface that slagging scorification is stain, the mouth that sandblasts is installed
The inner flue gas of the stove temperature range of position is：500～1200 DEG C, being softened or melted for the grains of sand is prevented from, and ensures enough hardness
The grains of sand with flue gas, effectively the heating surface that easy slagging scorification is stain is cleaned in erosion.
2nd, this utility model is directly using secondary wind or special compressed air the taking as sootblowing dielectric for arranging of boiler
Band gas, does not adopt Boiler Steam or flue gas, and energy expenditure is little, and pipeline modification is simple.This utility model is to boiler heating surface
Clean method, can be carried out in boiler operatiopn, not affect the normal operation of boiler.
3rd, it is using the grains of sand as the solid particle in sootblowing dielectric, economical convenient, it is little to carrying gas flow rate requirement.The grains of sand
Grain diameter is little, and the mechanical wear and impact to heating surface is little；Good fluidity, easily can equably be full of burner hearth, not deposit
At deashing dead angle；Each heating surface is flowed through with flue gas, can erosion in time cleaning heating surface on slagging scorification and dust stratification.
4th, in the mouth that sandblasts of differing heights, the flow velocity and grains of sand content of sootblowing dielectric be adjustable, soot blowing adjustable angle, Ke Yishi
Heating surface now to zones of different, different slagging scorification dust stratification situations are more effectively cleaned.
Description of the drawings
Fig. 1 is the system flow chart of this utility model specific embodiment.
Fig. 2 is mouthful position view that sandblasts of this utility model specific embodiment.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment, further describe this utility model.It should be understood that each part is equal shown in figure
Schematically not to be drawn by concrete size, specific embodiment is limited the use of for illustrating that this utility model is not of the present utility model
Scope.
As shown in figure 1, a kind of controllable erosion system for cleaning boiler heating surface described in the utility model, including installation
In some groups of mouths 4 that sandblast of boiler wall, it is connected with the mouth 4 that sandblasts through some groups of sootblowing dielectric delivery pipes of boiler furnace wall
Road 3, and the particle delivery systems 1 being connected with sootblowing dielectric conveyance conduit 3 it is gentle-granule mixing arrangement 2.
Particle delivery systems 1 enter gas-granule mixing arrangement 2 to gas-supply grains of sand of granule mixing arrangement 2, flowing gas
The grains of sand are carried as sootblowing dielectric, sootblowing dielectric is via sootblowing dielectric conveyance conduit 3 by the mouth that sandblasts installed in diverse location
Send into boiler furnace to be cleaned boiler heating surface, with slagging scorification and the product of the sand dashed sand erosion boiler heating surface of flow of flue gas
Ash, makes the slagging scorification on heating surface and the abrasion of dust stratification layer, crushes, departs from, and the purging with reference to flowing gas is acted on, and reaches cleaning pot
The effect of stove heating surface.
There are a certain amount of grains of sand in sootblowing dielectric, when sootblowing dielectric is sprayed in burner hearth, grains of sand granule flows in burner hearth, with
The slagging scorification of certain speed and angle erosion boiler heating surface and dust stratification layer, by the grains of sand to slagging scorification and the continuous friction of dust stratification layer
And erosion, the slagging scorification on heating surface and dust stratification abrasion are made, is crushed and is departed from, prevent the constantly growth for staiing layer thickening.Meanwhile, it is husky
Grain has less grain diameter, thus with good mobility, easily full of whole burner hearth, each heating surface is all had
Erosion is acted on, and is difficult the presence of deashing dead angle, it is also possible to flow through each heating surface with flue gas, is bonded in boiler and is received so as to remove in time
Slagging scorification and dust stratification on hot face.
Further, the content of the flow velocity and the grains of sand of the sootblowing dielectric is adjustable, and the flow velocity of sootblowing dielectric can be by adjusting stream
Take offence body flow velocity adjusting, grains of sand content can be adjusted by adjusting the supply of grains of sand unit interval.Adopt in this example
With boiler secondary air as flowing gas, the adjustable extent of secondary wind flow velocity is 10 meter per second～100 meter per seconds, husky in the air-flow that sandblasts
The content of grain is 0.1kg/m3～1000kg/m3.Have as flowing gas using secondary wind that pipeline transformation is little, arrangement is simple
Advantage, but which has the shortcomings that flow velocity is difficult to adjust, affects air distribution condition of burning；According to compressed air as flowing gas
Advantage be pipeline without taking Insulation, low cost, maintenance cost are low, and which has the disadvantage, and power consumption is high, compressor short life.When
When the slagging scorification of boiler heating surface is with dust stratification degree and different composition, the content of different sootblowing dielectric flow velocitys and the grains of sand can be adopted,
To reach the purpose that boiler heating surface is cleaned in controllable effectively erosion.For hardness is bigger, the slagging scorification that caking property is strong, degree is serious
And dust stratification, larger sootblowing dielectric flow velocity and grains of sand content can be adopted；When slagging scorification and dust stratification hardness it is little, it is more loose when, can
Sootblowing dielectric flow velocity and grains of sand content are adjusted to into smaller value.
The solid particle is the grains of sand, using the grains of sand as erosion boiler heating surface granule cost is relatively low, economic convenience.
Simultaneously, it is contemplated that sand particle size is less not only relatively low to carrying gas flow rate requirement, and good fluidity, can be with flue gas whole
Flowing in individual burner hearth.Therefore the grains of sand not only can effectively water wall surface in erosion burner hearth, can be entering water with flue gas
Flat flue and vertical flue, the effective heating surface such as erosion reheater, superheater, economizer successively, and with flue gas in the lump through removing
Dirt device, without being separately provided solid particle retracting device.The grains of sand, because with particle diameter particularity less than normal, which is received to boiler
The mechanical wear and effect of impact in hot face is less than ash removal methods such as steel ball deashing, mechanical vibrators；Its particle weight is little, easily with cigarette
Flow of air is in whole burner hearth, therefore there is no deashing dead angle, and together flows through each heating surface with flue gas, can be timely and effective
Ground cleaning is bonded in slagging scorification and dust stratification on heating surface.
Fig. 2 shows the installation site of the mouth that sandblasts, and after the mouth installation main burning area that sandblasts, easily occurs what slagging scorification was stain
Before heating surface (such as position 5), along boiler wall vertical direction is equidistant or non-equidistant arrangement, it is also possible to as needed installed in pot
Stove roof of the furnace (such as position 6), equidistant in horizontal or vertical direction or non-equidistant number of permutations row.The mouth that sandblasts is installed by above-mentioned position can be with
The higher main burning area of temperature is avoided, makes granule remain to keep graininess rather than molten condition in penetrating burner hearth, while having
The heating surface that easy slagging scorification is stain is cleaned in effect erosion.
Multigroup mouth that sandblasts is arranged on diverse location and height, by the stream of sootblowing dielectric in the mouth that sandblasts of regulation differing heights
The content of speed and the grains of sand, controls the clean-up performance to zones of different heating surface.When Boiler Heating Surfaces in horizontal flue and dust stratification
The flow velocity and the content of the grains of sand of sootblowing dielectric in the mouth that sandblasts at burner hearth furnace roof when situation is serious, can be increased, so as to control to enter
Grains of sand amount in horizontal flue, increases abrasion and erosion of the grains of sand to heating surface in horizontal flue.
Further, the mouth that sandblasts is adjustable with the angle of boiler wall, the angular range between its axis and boiler wall be 10 °～
90 °, direction in stove is pointed to, and any direction can be pointed to as needed in the three dimensions in stove.The grains of sand are to Boiler Heating Surfaces
It is relevant with its speed and impact angle with the erosion effect of dust stratification layer, thus can pass through to adjust the angle of each mouth that sandblasts can be with
Cleaning effect of the adjustment to each heating surface.The spray angle for adjusting the mouth that sandblasts simultaneously can control the grains of sand in burner hearth, horizontal flue
And the distribution situation in vertical flue.Can ensure to enter the boiler heating surface under zones of different, differing heights, condition of different temperatures
Row is fully cleaned.
Further, the grains of sand flow through horizontal flue, vertical flue, back-end ductwork with flue gas, finally together enter with flue gas and remove
Dirt device is removed, and need not be separately provided retracting device.
Further, this utility model method can be carried out in boiler operatiopn, need not arrange timing cleaning cycle, can be in pot
Controllable erosion cleaning is carried out to heating surface in real time in stove operation.
Above-described embodiment be to explanation of the present utility model, not to restriction of the present utility model, it is any new to this practicality
Scheme after type simple change belongs to protection domain of the present utility model.
Claims (3)
1. a kind of controllable erosion system for cleaning boiler heating surface, it is characterised in that：If including installed in boiler wall
The dry group of mouth that sandblasts (4), is connected with the mouth that sandblasts (4) through some groups of sootblowing dielectric conveyance conduits (3) of boiler furnace wall, and
The particle delivery systems (1) that are connected with sootblowing dielectric conveyance conduit (3) are gentle-granule mixing arrangement (2).
2. a kind of controllable erosion system for cleaning boiler heating surface according to claim 1, it is characterised in that：It is described
Mouth (4) sandblast after main burning area, before the heating surface for slagging scorification easily occurs, staiing, sandblasts in the stove of mouthful installation site
Flue-gas temperature scope is：500～1200 DEG C, along boiler wall vertical direction is equidistant or non-equidistant arrangement；Or installed in pot
Stove furnace roof, transversely equidistant with longitudinal direction or non-equidistant arrangement.
3. a kind of controllable erosion system for cleaning boiler heating surface according to claim 1, it is characterised in that：It is described
The adjustable angle sandblasted between mouth (4) and boiler wall, the angular range between its axis and boiler wall are 10 °～90 °, point to stove
Interior direction, and any direction can be pointed to as needed in the three dimensions in stove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621046918.0U CN206073106U (en) | 2016-09-09 | 2016-09-09 | A kind of controllable erosion system for cleaning boiler heating surface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621046918.0U CN206073106U (en) | 2016-09-09 | 2016-09-09 | A kind of controllable erosion system for cleaning boiler heating surface |
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| CN206073106U true CN206073106U (en) | 2017-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196115A (en) * | 2016-09-09 | 2016-12-07 | 西安交通大学 | A kind of controlled erosion system and method for cleaning boiler heating surface |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106196115A (en) * | 2016-09-09 | 2016-12-07 | 西安交通大学 | A kind of controlled erosion system and method for cleaning boiler heating surface |
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