CN109000223A - A kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure - Google Patents
A kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure Download PDFInfo
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- CN109000223A CN109000223A CN201810610502.4A CN201810610502A CN109000223A CN 109000223 A CN109000223 A CN 109000223A CN 201810610502 A CN201810610502 A CN 201810610502A CN 109000223 A CN109000223 A CN 109000223A
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- thermal insulation
- insulation layer
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
- F23C10/24—Devices for removal of material from the bed
- F23C10/26—Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedures, comprising the following steps: and one, it determines thermal insulation layer cavity: determining thermal insulation layer damaged condition and thermal insulation layer cavity range；Two, it opens up and repairs hole: opening up several in the surrounding corner of thermal insulation layer cavity and repair hole；Three, connect pressing machine: selection grout hole, the welding metal short tube at grout hole, short metal pipe connect pressing machine pipeline；Four, grouting indentation: the heat-insulated press-in material being stirred being packed into the hopper of pressing machine, starts pressing machine, and heat-insulated press-in material is pressed into thermal insulation layer cavity；Pressing machine is closed when having heat-insulated press-in material spilling from peep hole；Five, 5-10 days excision short metal pipes after furnace lifting will repair hole closing with iron plate.Reparation of the present invention completing material return device for circulating fluidized bed boiler cylinder part thermal insulation layer lining in such a way that material returning device wall outer wall aperture is pressed into heat-insulated press-in material can shorten the lining building time, reduce furnace lining price for repairing.
Description
Technical field
The present invention relates to recirculating fluidized bed material returning device insulating and wearing-resistant lining field more particularly to a kind of circulating fluidized bed boiler
Material returning device part thermal insulation layer lining restorative procedure.
Background technique
Circulating fluidized bed boiler (CFBB) material returning device is important component part.900 DEG C of operation temperature or so, media particle
1600 kg/Nm3 of concentration (accumulation volume) left and right, 0.2 m/s of grey speed or so.Generally use multilayer insulation wear resistance lining structure.Every
Thermosphere is using small heat-barrier materials of thermal coefficients such as heat insulating casting material, refractory fibre product or calcium silicate boards, and wearing layer is using resistance to
The high wear-resistant castable of mill property.The thermal expansion coefficient of wearing layer and thermal insulation layer differs greatly, and long-time service is easy to produce interlayer seam
Gap.Wearing layer is used for a long time more with crackle after multiple start and stop.And thermal insulation layer is low using temperature, intensity is low, once it is big with hardness
High-temperature medium particle contact, thermal insulation layer is worn out quickly, wearing layer outwardly sound often occurs and material returning device wall overheat shows
As not only increasing heat dissipation capacity, and there are serious security risks.Need to be thermally shielded repairing for wear resistance lining in the case
It mends.General method for repairing and mending is that the insulating and wearing-resistant lining of cylinder body outer wall superheat section is removed the method for remaking lining again to repair
It is multiple.
Traditional CFBB material returning device cylinder refractory liner restorative procedure has the following problems: 1, material returning device barrel diameter is small,
Working face is small, and operation difficulty is big；2, maintenance engineering amount is big, waste is big, and the wearing layer castable for needing not damage is also simultaneously
It removes, repair；3, wearing layer thickness is big, body is close big, and risk is big when dismounting；4, more wearing layer linings are caused to connect simultaneously
Seam, furnace lining globality are deteriorated；5, it needs baker that could use after lining reparation, increases maintenance time and baker expense.
The presence of problem above, make the maintenance time of material return device for circulating fluidized bed boiler refractory liner it is long, it is costly, maintenance
It is of low quality.
Summary of the invention
The present invention provides a kind of material return device for circulating fluidized bed boiler part to solve shortcoming in the prior art
Thermal insulation layer lining restorative procedure, completing recirculating fluidized bed in such a way that material returning device wall outer wall aperture is pressed into heat-insulated press-in material
The reparation of boiler return feeder cylinder part thermal insulation layer lining can shorten the lining building time, reduce the furnace lining cost of repairs.
In order to solve the above technical problems, the present invention adopts the following technical scheme: a kind of material return device for circulating fluidized bed boiler office
Portion's thermal insulation layer lining restorative procedure, comprising the following steps:
Step 1 determines thermal insulation layer cavity: tentatively true according to overtemperature situation of the material returning device cylinder wall in day-to-day operation first
Determine thermal insulation layer damaged condition, taps overtemperature site boundary with hammer, listening determines thermal insulation layer cavity range；
Step 2 opens up and repairs hole: opening up several in the surrounding corner of thermal insulation layer cavity and repairs hole；
Step 3 connects pressing machine: selecting one as grout hole in wherein one reparation hole, weld and have at grout hole
The short metal pipe of screw thread or flange, remaining repairs hole as peep hole, and short metal pipe connects pressing machine pipeline；
Step 4, grouting indentation: the heat-insulated press-in material being stirred being packed into the hopper of pressing machine, starts pressing machine, will be heat-insulated
Press-in material is pressed into thermal insulation layer cavity by pressing machine pipeline and short metal pipe；There is heat-insulated press-in material to overflow from peep hole
When, it closes pressing machine and stops being pressed into heat-insulated press-in material, block short metal pipe；
Step 5,5-10 days excision short metal pipes after furnace lifting fill out cellucotton at hole repairing, will repair hole closing with iron plate.
Preferably, in step 2, when opening up reparation hole, metal anchorage need to be avoided, the material returning device at thermal insulation layer cavity
On cylinder wall respectively circumferentially opened up with 500 ± 50mm of axially spaced-apart, repair hole size be φ 30- φ 50mm, one every
Two reparation holes are at least opened up at thermosphere cavity, one of them is as grout hole, another is as peep hole.
Preferably, in step 3, the reparation hole for selecting the top positioned at thermal insulation layer cavity to locate between two parties is as grout hole.
Preferably, in step 4, when thermal insulation layer cavity has different height position that is multiple and being located at material returning device cylinder, first
It is in the milk since the thermal insulation layer cavity for being located at material returning device cylinder lower part, from material returning device inside, if at thermal insulation layer cavity
Wearing layer has dilatation joint, then is in the milk and needs when being pressed into while observing the case where heat-insulated press-in material oozes out from dilatation joint, to heat-insulated
Press-in material oozes out from dilatation joint, while when the pressure reduction of pressing machine, clogs dilatation joint with pottery fiber cotton, removes pressing machine pipe
Road, blocks the grout hole at the thermal insulation layer cavity and replaces a grout hole of more top and carry out grouting push operation；In same
The peep hole of one horizontal plane, which has to rise with the horizontal line of heat-insulated press-in material when the exudation of heat-insulated press-in material, block until completely
It blocks；Aforesaid operations are repeated until whole thermal insulation layer cavity groutings is completed.
Preferably, in step 3, the internal diameter of the outer diameter and pressing machine pipeline of short metal pipe matches, the internal diameter of short metal pipe
Match with the diameter of grout hole, one end of short metal pipe is connect by welding manner with material returning device cylinder wall, short metal pipe
The other end connect with the discharge port of pressing machine pipeline by fastener.
Preferably, the feed inlet of pressing machine pipeline is connect by fastener with pressing machine, and pressing machine selection for pipeline is high-intensitive
Sebific duct.
Preferably, pressing machine selects piston type or squash type mortar pump, when completing operation or longer intermediate idle hours and
Heat-insulated press-in material in Shi Qingli hopper and pressing machine pipeline.
Preferably, heat-insulated press-in material is mainly made of the raw material of following weight percent: light-weight refractory aggregate 40-60%, resistance to
Fiery powder 8-20%, bonding agent 15-40%, Ultramicro-powder 0.5-10%, plasticizer 0.1-10% and cellucotton 0.5-10%, it is additional above-mentioned
The compound additive of total mass of raw material 0.1-3%.
According to above-mentioned heat-insulated press-in material, it is mainly made of the raw material of following weight percent: light-weight refractory aggregate
42%, refractory powder 20%, bonding agent 30%, Ultramicro-powder 3%, plasticizer 4.5 and cellucotton 0.5%, additional above-mentioned raw materials gross mass
0.3% compound additive.
According to above-mentioned heat-insulated press-in material, the light-weight refractory aggregate is haydite, expanded vermiculite, expanded perlite, lightweight
Brick sand, light-weight mullite or alumina hollow ball, the partial size of light-weight refractory aggregate are 0.1-8mm.
According to above-mentioned heat-insulated press-in material, the refractory powder is clay, alumina, floating bead, flyash or slag fine powder, resistance to
Partial size≤0.074mm of fiery powder.
According to above-mentioned heat-insulated press-in material, the bonding agent is solid binder or liquid binder, and solid binder is
Portland cement, aluminate cement, sulphate aluminium cement combine clay；Liquid binder is that waterglass, silica solution or aluminium are molten
Glue.
According to above-mentioned heat-insulated press-in material, the Ultramicro-powder is alumina powder, silicon powder, chromium oxide powder or zirconia powder.
According to above-mentioned heat-insulated press-in material, the plasticizer is organic plasticizers or inorganic plasticizer.
According to above-mentioned heat-insulated press-in material, the cellucotton is ceramic fiber cotton, rock wool or organic fiber cotton.
According to above-mentioned heat-insulated press-in material, the compound additive is organo-silicon coupling agent.
According to the specifically used method of above-mentioned heat-insulated press-in material, it is by light-weight refractory aggregate, refractory powder, combination
It is packed after the metering such as agent, Ultramicro-powder, plasticizer, cellucotton, compound additive.For two-component packet when using liquid binder
Dress.Adding water or bonding agent to stir evenly when use according to a certain percentage can be installed by the modes such as being pressed into, pumping, Gu
Change, come into operation after baking.The heat-insulated press-in material has good mobility, fillibility and thermal insulation, bulk density 800-
1500kg/m3, it is suitable for mechanization indentation construction.
Light-weight refractory aggregate is generally partial size 0.1mm or more, natural or artificial synthesized with higher refractoriness and hardness
Light material.Its kind includes but is not limited to: haydite, expanded vermiculite, expanded perlite, light-weight brick sand, light-weight mullite, oxidation
Aluminium hollow sphere etc..Partial size is general maximum no more than 8mm, and too big particle can not carry out indentation construction, according to the thickness of refractory lining
Degree determines.
Refractory powder can be by light-weight refractory aggregate further it is levigate form, be also possible to clay, alumina, floating bead, powder
Coal ash, ground slag etc..
Bonding agent can be portland cement, aluminate cement, sulphate aluminium cement, in conjunction with solid binders such as clays,
It is also possible to the liquid binders such as waterglass, silica solution, Aluminum sol.
Ultramicro-powder is the very big refractory material fine powder of fineness, and material includes but is not limited to alumina powder, silicon powder, chromium oxide
Powder, zirconia powder etc..It commonly include alumina powder, silicon powder etc..
Plasticizer is the material that is layered after increasing heat-insulated press-in material plasticity, mixture being avoided to add water, be can be organically,
It is also possible to inorganic.
Cellucotton is used to improve the material of the cracking resistance of the furnace lining after mixture adds water to install, including but not limited to ceramic
Cellucotton, rock wool, organic fiber cotton etc.；Cellucotton can also generally improve the plasticity of mixture.
Compound additive is based on organic surface active agent.
By adopting the above technical scheme, the invention has the following advantages that
The present invention mainly uses the spaced openings on material returning device metal wall, using pressing machine by heat-insulated press-in material from grout hole
The method of indentation thermal insulation layer cavity is repaired, and is replaced and is removed the insulating and wearing-resistant lining of material returning device cylinder body outer wall superheat section again
The restorative procedure for remaking lining no longer needs to the wearing layer castable that will do not damage also while removing, repairing, avoids and tear open
Issuable danger when except wearing layer, while more wearing layer lining seams are avoided, ensure furnace lining globality, more
Importantly, due to which the heat-insulated press-in material that the present invention uses when repairing has been subjected to quick baking, therefore after repairing lining, it is not necessarily to
Furnace lining Decrepitation Phenomena will not occur for baker, save plenty of time of baker consuming and artificial etc., shorten maintenance time, reduce
Baker expense can save great amount of cost for enterprise.
The present invention repairs hole on material returning device cylinder wall at thermal insulation layer cavity respectively circumferentially between axial direction opening up
Multiple reparation holes are opened up every 500 ± 50mm, select one of them as grout hole, remaining is repaired hole and is all used as peep hole, with
Existing grouting method (opening two reparation holes, one of them is for being in the milk, another is for the slurry that overflows) has significant difference, multiple
Peep hole can help service worker to ensure the reparation situation of thermal insulation layer in repair process, because only opening up two reparation Kong Xiu
It cannot determine whether heat-insulated damage layer situation has completely been not present well after multiple, since centre is there may be isolated island part,
There may be the abrasion of thickness direction, multiple peep holes are observed during being easily repaired, and are avoided omitting, are also reduced and only open
Two holes cause the risks such as grouting pressure is excessive, filling is discontented.
The present invention selects light-weight refractory aggregate and refractory powder, using based on bonding agent and the compound additive of auxiliary, adds
Add Ultramicro-powder and plasticizer, the heat-insulated press-in material of low cost is produced by simply puddling, which is a kind of bulk density
For 800-1500kg/m3Heat-insulated press-in material, be suitable for mechanization indentation construction.
Detailed description of the invention
Fig. 1 is using reparation schematic diagram of the invention；
In figure: 1, material returning device cylinder wall, 2, short metal pipe, 3, hopper, 4, heat-insulated press-in material, 5, pressing machine, 6, pressing machine pipe
Road, 7, fastener, 8, residual thermal insulation layer, 9, wearing layer, 10, metal anchorage, 11, thermal insulation layer cavity, 12, reparation hole.
Specific embodiment
As shown in Figure 1, a kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure of the invention includes
Following steps:
Step 1 determines thermal insulation layer cavity 11: preliminary according to overtemperature situation of the material returning device cylinder wall 1 in day-to-day operation first
It determines thermal insulation layer damaged condition, taps overtemperature site boundary with hammer, listening determines 11 range of thermal insulation layer cavity；
Step 2 opens up and repairs hole 12: opening up several in the surrounding corner of thermal insulation layer cavity 11 and repairs hole 12；
When opening up reparation hole 12, metal anchorage 10 need to be avoided, on the material returning device cylinder wall 1 at thermal insulation layer cavity 11 respectively
It is circumferentially opened up with axially spaced-apart 500mm, the size for repairing hole 12 is φ 40mm, at least opens up two at a thermal insulation layer cavity 11
A reparation hole 12, one of them is as grout hole, another is as peep hole.
Step 3 connects pressing machine 5: the reparation hole 12 for selecting the top positioned at thermal insulation layer cavity 11 to locate between two parties is as grouting
Hole, short metal pipe 2 of the welding with screw thread or flange at grout hole, remaining is repaired hole 12 and is used as peep hole, peep hole
Have the function of that 11 inner air of thermal insulation layer cavity is discharged simultaneously in filling process, short metal pipe 2 connects pressing machine pipeline 6；
Step 4, grouting indentation: the heat-insulated press-in material 4 being stirred being packed into the hopper 3 of pressing machine 5, starts pressing machine 5, is filled
The pressure and speed for starching indentation need to determine according to field condition, break thermal insulation layer to avoid the pressure of grouting indentation excessive
Bad, the pressure for indentation of being in the milk is generally 3-4Mpa；Heat-insulated press-in material 4 is pressed by pressing machine pipeline 6 and short metal pipe 2 heat-insulated
In layer cavity 11；When having heat-insulated press-in material 4 spilling from peep hole, closes pressing machine 5 and stops being pressed into heat-insulated press-in material 4,
Block short metal pipe 2；
When thermal insulation layer cavity 11 has different height position that is multiple and being located at material returning device cylinder, first under material returning device cylinder
The thermal insulation layer cavity 11 in portion starts to be in the milk, from material returning device inside, if the wearing layer 9 at thermal insulation layer cavity 11 has expansion
Seam is then in the milk and needs when being pressed into while observing the case where heat-insulated press-in material 4 oozes out from dilatation joint, to heat-insulated press-in material 4 from swollen
It is oozed out at expansion joint (E.J.), while when the pressure reduction of pressing machine 5, clogs dilatation joint with pottery fiber cotton, remove pressing machine pipeline 6, block this
Grout hole at a thermal insulation layer cavity 11 and grout hole for replacing more top carries out grouting push operation；In same level
Peep hole have to rise with the horizontal line of heat-insulated press-in material 4 when the exudation of heat-insulated press-in material 4 and block until completely blocking；Weight
Multiple aforesaid operations are until whole thermal insulation layer cavitys 11 is in the milk and completes.
Step 57 days after furnace lifting, cuts off short metal pipe 2, fills out cellucotton at hole 12 repairing, will repair hole with iron plate
12 closings.
The residual thermal insulation layer 8 of breakage may be adjacent to material returning device cylinder wall 1 or wearing layer on material returning device cylinder wall 1
9, it is also possible between material returning device cylinder wall 1 and wearing layer 9.Remaining thermal insulation layer 8 can be thicker, can also be very thin, even
All disappear.For the different situations of above-mentioned residual thermal insulation layer 8, using above-mentioned restorative procedure, by pressing machine 5 by heat-insulated indentation
In 4 indentation thermal insulation layer cavity 11 of material, the gap between filling material returning device cylinder wall 1, residual thermal insulation layer 8 and wearing layer 9, equal energy
The reparation for completing material returning device lining, forms furnace lining very close to each other.
The outer diameter of short metal pipe 2 and the internal diameter of pressing machine pipeline 6 match, the internal diameter of short metal pipe 2 and grout hole it is straight
Diameter matches, and one end of short metal pipe 2 is connect by welding manner with material returning device cylinder wall 1, and the other end of short metal pipe 2 is logical
Fastener 7 is crossed to connect with the discharge port of pressing machine pipeline 6.The length of short metal pipe 2 is generally 100 ~ 200mm, is also possible to more
Long length.Short metal pipe 2 will have enough intensity, be able to bear the pressure of 10MPa.
The feed inlet of pressing machine pipeline 6 is connect by fastener 7 with pressing machine 5, and pressing machine pipeline 6 selects high-intensitive glue
Pipe.Pressing machine pipeline 6 is able to bear at least pressure of 10MPa, can also partially use steel pipe, and pressing machine pipeline 6 will contract as far as possible
It is short, avoid overlong time of the heat-insulated press-in material 4 in pressing machine pipeline 6.The section of pressing machine pipeline 6 is generally circular in cross section, size
It is adapted with other component interconnected.Fastener 7 and the connection of other component can be that buckle-type is connect, flange form connects
It connects, the modes such as screw-type connection or welding.Fastener 7 answer it is light, connection want quick, secured, closed, can bear at least
The pressure of 10MPa is without revealing.
Pressing machine 5 selects piston type or squash type mortar pump, completes to clear up in time when operation or longer intermediate idle hours
Heat-insulated press-in material 4 in hopper 3 and pressing machine pipeline 6 places solidification blocking pipeline to prevent heat-insulated press-in material 4 for a long time.
Heat-insulated press-in material 4 is mainly made of the raw material of following weight percent: light-weight refractory aggregate 42%, refractory powder
20%, bonding agent 30%, Ultramicro-powder 3%, plasticizer 4.5 and cellucotton 0.5%, the compound addition of additional above-mentioned raw materials gross mass 0.3%
Agent.
The light-weight refractory aggregate is haydite, expanded vermiculite, expanded perlite, light-weight brick sand, light-weight mullite or oxidation
Aluminium hollow sphere, the partial size of light-weight refractory aggregate are 0.1-8mm.
The refractory powder is clay, alumina, floating bead, flyash or slag fine powder, the partial size of refractory powder≤
0.074mm。
The bonding agent be solid binder or liquid binder, solid binder be portland cement, aluminate cement,
Sulphate aluminium cement combines clay；Liquid binder is waterglass, silica solution or Aluminum sol.
The Ultramicro-powder is alumina powder, silicon powder, chromium oxide powder or zirconia powder.
The plasticizer is organic plasticizers or inorganic plasticizer.
The cellucotton is ceramic fiber cotton, rock wool or organic fiber cotton.
The compound additive is organo-silicon coupling agent.
According to the specifically used method of above-mentioned heat-insulated press-in material, it is by light-weight refractory aggregate, refractory powder, combination
It is packed after the metering such as agent, Ultramicro-powder, plasticizer, cellucotton, compound additive.For two-component packet when using liquid binder
Dress.Adding water or bonding agent to stir evenly when use according to a certain percentage can be installed by the modes such as being pressed into, pumping, Gu
Change, come into operation after baking.The heat-insulated press-in material has good mobility, fillibility and thermal insulation, bulk density 800-
1500kg/m3, it is suitable for mechanization indentation construction.
Light-weight refractory aggregate is generally partial size 0.1mm or more, natural or artificial synthesized with higher refractoriness and hardness
Light material.Its kind includes but is not limited to: haydite, expanded vermiculite, expanded perlite, light-weight brick sand, light-weight mullite, oxidation
Aluminium hollow sphere etc..Partial size is general maximum no more than 8mm, and too big particle can not carry out indentation construction, according to the thickness of refractory lining
Degree determines.
Refractory powder can be by light-weight refractory aggregate further it is levigate form, be also possible to clay, alumina, floating bead, powder
Coal ash, ground slag etc..
Bonding agent can be portland cement, aluminate cement, sulphate aluminium cement, in conjunction with solid binders such as clays,
It is also possible to the liquid binders such as waterglass, silica solution, Aluminum sol.
Ultramicro-powder is the very big refractory material fine powder of fineness, and material includes but is not limited to alumina powder, silicon powder, chromium oxide
Powder, zirconia powder etc..It commonly include alumina powder, silicon powder etc..
Plasticizer is the material that is layered after increasing heat-insulated press-in material plasticity, mixture being avoided to add water, be can be organically,
It is also possible to inorganic.
Cellucotton is used to improve the material of the cracking resistance of the furnace lining after mixture adds water to install, including but not limited to ceramic
Cellucotton, rock wool, organic fiber cotton etc.；Cellucotton can also generally improve the plasticity of mixture.
Compound additive is based on organic surface active agent.
Carrying out material return device for circulating fluidized bed boiler in such a way that material returning device wall outer wall aperture is pressed into heat-insulated press-in material 4
The reparation of cylinder part thermal insulation layer lining can shorten the lining building time, reduce the furnace lining cost of repairs.By certain improvement
Can also carry out the online hot repair of local thermal insulation layer lining, change at present can only cold repair status.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (8)
1. a kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure, it is characterised in that: the following steps are included:
Step 1 determines thermal insulation layer cavity: tentatively true according to overtemperature situation of the material returning device cylinder wall in day-to-day operation first
Determine thermal insulation layer damaged condition, taps overtemperature site boundary with hammer, listening determines thermal insulation layer cavity range；
Step 2 opens up and repairs hole: opening up several in the surrounding corner of thermal insulation layer cavity and repairs hole；
Step 3 connects pressing machine: selecting one as grout hole in wherein one reparation hole, weld and have at grout hole
The short metal pipe of screw thread or flange, remaining repairs hole as peep hole, and short metal pipe connects pressing machine pipeline；
Step 4, grouting indentation: the heat-insulated press-in material being stirred being packed into the hopper of pressing machine, starts pressing machine, will be heat-insulated
Press-in material is pressed into thermal insulation layer cavity by pressing machine pipeline and short metal pipe；There is heat-insulated press-in material to overflow from peep hole
When, it closes pressing machine and stops being pressed into heat-insulated press-in material, block short metal pipe；
Step 5,5-10 days excision short metal pipes after furnace lifting fill out cellucotton at hole repairing, will repair hole closing with iron plate.
2. a kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure according to claim 1, special
Sign is: in step 2, when opening up reparation hole, need to avoid metal anchorage, the material returning device cylinder wall at thermal insulation layer cavity
Upper difference is circumferentially opened up with 500 ± 50mm of axially spaced-apart, and the size for repairing hole is φ 30- φ 50mm, a thermal insulation layer cavity
Place at least opens up two reparation holes, one of them is as grout hole, another is as peep hole.
3. a kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure according to claim 1, special
Sign is: in step 3, the reparation hole for selecting the top positioned at thermal insulation layer cavity to locate between two parties is as grout hole.
4. a kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure according to claim 1, special
Sign is: in step 4, thermal insulation layer cavity have it is multiple and be located at material returning device cylinder different height positions when, first from be located at return
The thermal insulation layer cavity of glassware cylinder lower part starts to be in the milk, from material returning device inside, if the wearing layer at thermal insulation layer cavity has
Dilatation joint is then in the milk and needs when being pressed into while observing the case where heat-insulated press-in material oozes out from dilatation joint, to heat-insulated press-in material from
It is oozed out at dilatation joint, while when the pressure reduction of pressing machine, clogs dilatation joint with pottery fiber cotton, remove pressing machine pipeline, block this
Grout hole at a thermal insulation layer cavity and grout hole for replacing more top carries out grouting push operation；In same level
Peep hole, which has to rise with the horizontal line of heat-insulated press-in material when the exudation of heat-insulated press-in material, block until blocking completely；In repetition
Operation is stated until whole thermal insulation layer cavity groutings is completed.
5. a kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure according to claim 1, special
Sign is: in step 3, the internal diameter of the outer diameter and pressing machine pipeline of short metal pipe matches, the internal diameter and grout hole of short metal pipe
Diameter match, one end of short metal pipe is connect by welding manner with material returning device cylinder wall, the other end of short metal pipe
It is connect by fastener with the discharge port of pressing machine pipeline.
6. a kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure according to claim 5, special
Sign is: the feed inlet of pressing machine pipeline is connect by fastener with pressing machine, pressing machine selection for pipeline high intensity sebific duct.
7. a kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure according to claim 1, special
Sign is: pressing machine selects piston type or squash type mortar pump, completes to clear up material in time when operation or longer intermediate idle hours
Heat-insulated press-in material in bucket and pressing machine pipeline.
8. a kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure according to claim 1, special
Sign is: the heat-insulated press-in material is mainly made of the raw material of following weight percent: light-weight refractory aggregate 40-60%, fire resisting
Powder 8-20%, bonding agent 15-40%, Ultramicro-powder 0.5-10%, plasticizer 0.1-10% and cellucotton 0.5-10%, additional above-mentioned original
Expect the compound additive of gross mass 0.1-3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810610502.4A CN109000223A (en) | 2018-06-14 | 2018-06-14 | A kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810610502.4A CN109000223A (en) | 2018-06-14 | 2018-06-14 | A kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure |
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| CN109000223A true CN109000223A (en) | 2018-12-14 |
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|---|---|---|---|
| CN201810610502.4A Pending CN109000223A (en) | 2018-06-14 | 2018-06-14 | A kind of material return device for circulating fluidized bed boiler part thermal insulation layer lining restorative procedure |
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| CN (1) | CN109000223A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681863A (en) * | 2019-01-03 | 2019-04-26 | 青海盐湖工业股份有限公司 | A kind of feed back pipeline repair technology of circulating fluidized bed boiler |
| CN110529843A (en) * | 2019-09-04 | 2019-12-03 | 张选 | A kind of restorative procedure of material returner of fluidized-bed boiler heat preservation heat insulation layer failure |
| CN116293653A (en) * | 2023-03-27 | 2023-06-23 | 新疆华电米东热电有限公司 | Method for repairing internal defect of boiler material returning device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109681863A (en) * | 2019-01-03 | 2019-04-26 | 青海盐湖工业股份有限公司 | A kind of feed back pipeline repair technology of circulating fluidized bed boiler |
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| CN116293653A (en) * | 2023-03-27 | 2023-06-23 | 新疆华电米东热电有限公司 | Method for repairing internal defect of boiler material returning device |
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Application publication date: 20181214 |