CN106082899B - A method of recycling boiler ash - Google Patents

A method of recycling boiler ash Download PDF

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Publication number
CN106082899B
CN106082899B CN201610353624.0A CN201610353624A CN106082899B CN 106082899 B CN106082899 B CN 106082899B CN 201610353624 A CN201610353624 A CN 201610353624A CN 106082899 B CN106082899 B CN 106082899B
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CN
China
Prior art keywords
parts
boiler ash
waterproofing agent
stalk
boiler
Prior art date
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CN201610353624.0A
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Chinese (zh)
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CN106082899A (en
Inventor
秦晓武
赵年根
徐晖
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Changzhou Southeast Thermal Power Co Ltd
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Changzhou Southeast Thermal Power Co Ltd
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Priority to CN201610353624.0A priority Critical patent/CN106082899B/en
Publication of CN106082899A publication Critical patent/CN106082899A/en
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/10—Lime cements or magnesium oxide cements
    • C04B28/12—Hydraulic lime
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/10—Burned or pyrolised refuse
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/244—Structural elements or technologies for improving thermal insulation using natural or recycled building materials, e.g. straw, wool, clay or used tires
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Civil Engineering (AREA)
  • Processing Of Solid Wastes (AREA)
  • Road Paving Structures (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses a kind of methods for recycling boiler ash, belong to field of combustion technology.Gained Boiler Ash brick of the invention has the good wet flame retardant property of resistance, and has good insulation effect, reaches shockproof requirements.The present invention, herein in connection with stalk, has prepared the Boiler Ash brick that performance matches in excellence or beauty with common brick by not only reducing the cost of steam power plant's processing Boiler Ash for the Boiler Ash recycling of steam power plant, environmentally friendly and energy saving.

Description

A method of recycling boiler ash
Technical field
The present invention relates to a kind of methods for recycling boiler ash, belong to field of combustion technology.
Background technique
A kind of generation of the boiler ash as thermal power plant, its stockpiling not only occupy a large amount of soil, but also Also certain pollution is caused to environment, how to improve the comprehensive utilization value of lime-ash, it is made to turn waste into wealth, become Recent study Emphasis.
Solution to this problem, which has, at present grinds boiler bottom slag, economizer cinder through coal pulverizer, then through boiler Burner is mixed with coal dust to be sent into burner hearth, and to reduce substance uncombusted in lime-ash, however above-mentioned technology has the following deficiencies: 1) by lime-ash, economizer cinder, air preheater cinder is weighed is supplied to coal pulverizer, since the abrasion of slag is higher than coal, greatly increase The abrasion of coal pulverizer, reduces the reliability and stability of coal pulverizer；2) broken lime-ash is fired with powder feeding pipes through spray Device is sent into burner hearth, destroys the material balance of boiler；3) it is sent out due to the calorific value of substance uncombusted in lime-ash well below coal dust Heat imitates the burning that a large amount of lime-ash penetrating burner hearth can reduce boiler.
Boiler Ash brickmaking is a kind of mode for recycling Boiler Ash.Curing agent is added in Boiler Ash, and applies certain Pressure, increase Boiler Ash interparticle contact surface, reunite by adsorption capacity between particle close, and particle deformation occurs, external force After shedding, this adsorption capacity is still remained, this is the initial strength source of Boiler Ash brick.With the growth of product pilling up time, Curing agent Ca (OH)2Hydration reaction occurs with Boiler Ash under water effect and generates hard substance.There is Boiler Ash brick Physically better mechanical property and durability are to solve the problems, such as that Boiler Ash whereabouts must be taken into consideration.
Summary of the invention
The invention solves first problem be to provide a kind of Boiler Ash brick, the good water-resisting ability having and pole Good heat-insulating property and compression strength.
The Boiler Ash brick, is counted in mass ratio, composed of the following components:
50-60 parts of Boiler Ash,
15-20 parts of stalk,
1-5 parts of lime,
2-3 parts of turf,
CaCl22-3 parts,
2-3 parts of fire retardant,
3-5 parts of waterproofing agent,
10-15 parts of water.
In one embodiment of the invention, the Boiler Ash derives from thermal power plant circulating fluidized bed boiler.
In one embodiment of the invention, the stalk includes the farmings such as rice straw, wheat stalk, corn stover One of object stalk is a variety of.
In one embodiment of the invention, the fire retardant includes brominated epoxy resin, brominated Polystyrene, ten bromines Diphenylethane.
In one embodiment of the invention, the waterproofing agent is waterproofing agent of organosilicon.
In one embodiment of the invention, the Boiler Ash brick, is counted in mass ratio, composed of the following components:
50 parts of Boiler Ash,
20 parts of stalk,
2 parts of lime,
3 parts of turf,
CaCl23 parts,
2 parts of fire retardant,
5 parts of waterproofing agent,
15 parts of water.
In one embodiment of the invention, the Boiler Ash brick, is counted in mass ratio, composed of the following components:
55 parts of Boiler Ash,
15 parts of stalk,
4 parts of lime,
3 parts of turf,
CaCl23 parts,
2 parts of fire retardant,
3 parts of waterproofing agent,
15 parts of water.
The present invention also provides a kind of methods for preparing the Boiler Ash brick, comprising the following steps:
(1) stalk dried, be crushed to 250 mesh, Boiler Ash, turf are crushed to 400 mesh；
(2) by CaCl2, fire retardant and waterproofing agent be added in 50-60 DEG C of water in proportion, the side Bian Tianjia stirs evenly；
(3) Boiler Ash crushed, stalk and turf are added sequentially in the mixture that step (2) obtains, stirring is equal It is even, 3-6h is kept the temperature under the conditions of 50-60 DEG C；
(4) mixed material that step (3) obtains is poured into mold compression moulding, it is then steam-cured under the conditions of 200 DEG C, 2MPa 12h, at workshop natural Health preservation 2-3 days after cooling.
The present invention provides a kind of novel Boiler Ash brick and preparation method thereof, gained Boiler Ash brick has good resistance wet Flame retardant property, and have good insulation effect, reach shockproof requirements.The present invention by the way that the Boiler Ash of steam power plant is recycled, The cost for not only reducing steam power plant's processing Boiler Ash has prepared the Boiler Ash brick that performance matches in excellence or beauty with common brick herein in connection with stalk, It is environmentally friendly and energy saving.
Specific embodiment
Embodiment 1
Boiler Ash brick, is counted in mass ratio, is contained:
50 parts of Boiler Ash,
20 parts of wheat stalk,
2 parts of lime,
3 parts of turf,
CaCl23 parts,
2 parts of fire retardant,
5 parts of waterproofing agent,
15 parts of water.
Preparation process the following steps are included:
(1) wheat stalk dried, be crushed to 250 mesh, Boiler Ash, turf are crushed to 400 mesh；
(2) by CaCl2, fire retardant and waterproofing agent be added in 55 DEG C of water in proportion, the side Bian Tianjia stirs evenly；
(3) Boiler Ash crushed, stalk and turf are added sequentially in the mixture that step (2) obtains, stirring is equal It is even, 6h is kept the temperature under the conditions of 55 DEG C；
(4) mixed material that step (3) obtains is poured into mold compression moulding, it is then steam-cured under the conditions of 200 DEG C, 2MPa 12h, at workshop natural Health preservation 2-3 days after cooling.
The thermal coefficient of obtained Boiler Ash brick is 0.041W/ (mK), compression strength 4.72MPa.
Embodiment 2
Boiler Ash brick, is counted in mass ratio, is contained:
55 parts of Boiler Ash,
15 parts of corn stover,
4 parts of lime,
3 parts of turf,
CaCl23 parts,
2 parts of fire retardant,
3 parts of waterproofing agent,
15 parts of water.
Preparation process the following steps are included:
(1) corn stover dried, be crushed to 250 mesh, Boiler Ash, turf are crushed to 400 mesh；
(2) by CaCl2, fire retardant and waterproofing agent be added in 60 DEG C of water in proportion, the side Bian Tianjia stirs evenly；
(3) Boiler Ash crushed, stalk and turf are added sequentially in the mixture that step (2) obtains, stirring is equal It is even, 6h is kept the temperature under the conditions of 60 DEG C；
(4) mixed material that step (3) obtains is poured into mold compression moulding, it is then steam-cured under the conditions of 200 DEG C, 2MPa 12h, at workshop natural Health preservation 2-3 days after cooling.
The thermal coefficient of obtained Boiler Ash brick is 0.043W/ (mK), compression strength 4.77MPa.
Reference examples 1
Boiler Ash brick, is counted in mass ratio, is contained:
45 parts of Boiler Ash,
25 parts of corn stover,
4 parts of lime,
3 parts of turf,
CaCl23 parts,
2 parts of fire retardant,
3 parts of waterproofing agent,
15 parts of water.
Preparation process the following steps are included:
(1) stalk dried, be crushed to 250 mesh, Boiler Ash, turf are crushed to 400 mesh；
(2) by CaCl2, fire retardant and waterproofing agent be added in 60 DEG C of water in proportion, the side Bian Tianjia stirs evenly；
(3) Boiler Ash crushed, stalk and turf are added sequentially in the mixture that step (2) obtains, stirring is equal It is even, 6h is kept the temperature under the conditions of 60 DEG C；
(4) mixed material that step (3) obtains is poured into mold compression moulding, it is then steam-cured under the conditions of 200 DEG C, 2MPa 12h, at workshop natural Health preservation 2-3 days after cooling.
The thermal coefficient of obtained Boiler Ash brick is 0.041W/ (mK), compression strength 4.07MPa.
Reference examples 2
Boiler Ash brick, is counted in mass ratio, is contained:
55 parts of Boiler Ash,
4 parts of lime,
3 parts of turf,
CaCl23 parts,
2 parts of fire retardant,
3 parts of waterproofing agent,
10 parts of water.
Preparation process the following steps are included:
(1) Boiler Ash, turf are crushed to 400 mesh；
(2) by CaCl2, fire retardant and waterproofing agent be added in 60 DEG C of water in proportion, the side Bian Tianjia stirs evenly；
(3) Boiler Ash crushed, stalk and turf are added sequentially in the mixture that step (2) obtains, stirring is equal It is even, 6h is kept the temperature under the conditions of 60 DEG C；
(4) mixed material that step (3) obtains is poured into mold compression moulding, it is then steam-cured under the conditions of 200 DEG C, 2MPa 12h, at workshop natural Health preservation 2-3 days after cooling.
The thermal coefficient of obtained Boiler Ash brick is 0.029W/ (mK), compression strength 3.77MPa.
Reference examples 3
Boiler Ash brick, is counted in mass ratio, is contained:
55 parts of Boiler Ash,
15 parts of corn stover,
4 parts of lime,
CaCl23 parts,
2 parts of fire retardant,
3 parts of waterproofing agent,
15 parts of water.
Preparation process the following steps are included:
(1) corn stover dried, be crushed to 250 mesh, Boiler Ash is crushed to 400 mesh；
(2) by CaCl2, fire retardant and waterproofing agent be added in 60 DEG C of water in proportion, the side Bian Tianjia stirs evenly；
(3) Boiler Ash crushed, stalk and turf are added sequentially in the mixture that step (2) obtains, stirring is equal It is even, 6h is kept the temperature under the conditions of 60 DEG C；
(4) mixed material that step (3) obtains is poured into mold compression moulding, it is then steam-cured under the conditions of 200 DEG C, 2MPa 12h, at workshop natural Health preservation 2-3 days after cooling.
The thermal coefficient of obtained Boiler Ash brick is 0.039W/ (mK), compression strength 4.15MPa.
Reference examples 4
Boiler Ash brick, is counted in mass ratio, is contained:
55 parts of Boiler Ash,
15 parts of corn stover,
4 parts of lime,
3 parts of turf,
CaCl23 parts,
2 parts of fire retardant,
3 parts of waterproofing agent,
15 parts of water.
Preparation process the following steps are included:
(1) corn stover dried, be crushed to 250 mesh, Boiler Ash, turf are crushed to 400 mesh；
(2) by CaCl2, fire retardant and waterproofing agent be added in 60 DEG C of water in proportion, the side Bian Tianjia stirs evenly；
(3) Boiler Ash crushed, stalk and turf are added sequentially in the mixture that step (2) obtains, stirring is equal Even is to pour into mold compression moulding, then the steam-cured 12h under the conditions of 200 DEG C, 2MPa, at workshop natural Health preservation 2-3 days after cooling.
The thermal coefficient of obtained Boiler Ash brick is 0.033W/ (mK), compression strength 3.57MPa.
Although the present invention has been described by way of example and in terms of the preferred embodiments, it is not intended to limit the invention, any to be familiar with this skill The people of art can do various change and modification, therefore protection model of the invention without departing from the spirit and scope of the present invention Enclosing subject to the definition of the claims.

Claims (15)

1. a kind of Boiler Ash brick, which is characterized in that it counts in mass ratio, composed of the following components:
50-60 parts of Boiler Ash,
15-20 parts of stalk,
1-5 parts of lime,
2-3 parts of turf,
CaCl22-3 parts,
2-3 parts of fire retardant,
3-5 parts of waterproofing agent,
10-15 parts of water；
The Boiler Ash brick is prepared by the following method:
(1) stalk dried, be crushed to 250 mesh, Boiler Ash, turf are crushed to 400 mesh；
(2) by CaCl2, fire retardant and waterproofing agent be added in 50-60 DEG C of water in proportion, the side Bian Tianjia stirs evenly；
(3) Boiler Ash crushed, stalk and turf are added sequentially in the mixture that step (2) obtains, are stirred evenly, 3-6h is kept the temperature under the conditions of 50-60 DEG C；
(4) mixed material that step (3) obtains is poured into mold compression moulding, then the steam-cured 12h under the conditions of 200 DEG C, 2MPa, At workshop natural Health preservation 2-3 days after cooling.
2. a kind of Boiler Ash brick according to claim 1, which is characterized in that it counts in mass ratio, composed of the following components:
50 parts of Boiler Ash,
20 parts of stalk,
2 parts of lime,
3 parts of turf,
CaCl23 parts,
2 parts of fire retardant,
5 parts of waterproofing agent,
15 parts of water.
3. a kind of Boiler Ash brick according to claim 1, which is characterized in that it counts in mass ratio, composed of the following components:
55 parts of Boiler Ash,
15 parts of stalk,
4 parts of lime,
3 parts of turf,
CaCl23 parts,
2 parts of fire retardant,
3 parts of waterproofing agent,
15 parts of water.
4. a kind of Boiler Ash brick according to claim 1 or 2 or 3, which is characterized in that the Boiler Ash derives from steam power plant Circulating fluidized bed boiler.
5. a kind of Boiler Ash brick according to claim 1 or 2 or 3, which is characterized in that the stalk include rice straw, One of wheat stalk, corn stover are a variety of.
6. a kind of Boiler Ash brick according to claim 1, which is characterized in that the fire retardant include brominated epoxy resin, Brominated Polystyrene, decabromodiphenylethane.
7. a kind of Boiler Ash brick according to claim 2, which is characterized in that the fire retardant include brominated epoxy resin, Brominated Polystyrene, decabromodiphenylethane.
8. a kind of Boiler Ash brick according to claim 3, which is characterized in that the fire retardant include brominated epoxy resin, Brominated Polystyrene, decabromodiphenylethane.
9. a kind of Boiler Ash brick according to claim 1, which is characterized in that the waterproofing agent is waterproofing agent of organosilicon.
10. a kind of Boiler Ash brick according to claim 2, which is characterized in that the waterproofing agent is waterproofing agent of organosilicon.
11. a kind of Boiler Ash brick according to claim 3, which is characterized in that the waterproofing agent is waterproofing agent of organosilicon.
12. a kind of method for preparing claims 1 or 2 or the 3 Boiler Ash bricks, which comprises the following steps:
(1) stalk dried, be crushed to 250 mesh, Boiler Ash, turf are crushed to 400 mesh；
(2) by CaCl2, fire retardant and waterproofing agent be added in 50-60 DEG C of water in proportion, the side Bian Tianjia stirs evenly；
(3) Boiler Ash crushed, stalk and turf are added sequentially in the mixture that step (2) obtains, are stirred evenly, 3-6h is kept the temperature under the conditions of 50-60 DEG C；
(4) mixed material that step (3) obtains is poured into mold compression moulding, then the steam-cured 12h under the conditions of 200 DEG C, 2MPa, At workshop natural Health preservation 2-3 days after cooling.
13. Boiler Ash brick described in claim 1 is piling up the application in wall.
14. Boiler Ash brick described in claim 2 is piling up the application in wall.
15. Boiler Ash brick described in claim 3 is piling up the application in wall.
CN201610353624.0A 2016-05-25 2016-05-25 A method of recycling boiler ash Active CN106082899B (en)

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Application Number Priority Date Filing Date Title
CN201610353624.0A CN106082899B (en) 2016-05-25 2016-05-25 A method of recycling boiler ash

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CN106082899A CN106082899A (en) 2016-11-09
CN106082899B true CN106082899B (en) 2019-03-05

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Publication number Priority date Publication date Assignee Title
CN115259811B (en) * 2022-08-29 2023-04-25 常熟金陵海虞热电有限公司 Recycling method of boiler ash of thermal power plant

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103864387B (en) * 2012-12-17 2016-06-01 虞建放 Boiler ash brick

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