CN107628797A - The method that flue gas desulfurization and denitrification manufactures foaming thermal-insulating - Google Patents
The method that flue gas desulfurization and denitrification manufactures foaming thermal-insulating Download PDFInfo
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- CN107628797A CN107628797A CN201711064375.4A CN201711064375A CN107628797A CN 107628797 A CN107628797 A CN 107628797A CN 201711064375 A CN201711064375 A CN 201711064375A CN 107628797 A CN107628797 A CN 107628797A
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- 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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Abstract
The invention discloses a kind of method of flue gas desulfurization and denitrification manufacture foaming thermal-insulating.Desulphurization denitration slurries are obtained using ozone and mixed base desulfurization denitrification agent wet-treating flue gas；Gained desulphurization denitration slurries and the raw material comprising industrial solid wastes, foaming agent and magnesia are mixed to form mixed slurry；Mixed slurry is foamed, then conserved 5~10 hours under conditions of temperature is 20~60 DEG C and humidity is 50~100%.Mixed base desulfurization denitrification agent includes 30~60 parts by weight magnesia, 20~50 parts by weight red muds and 20~50 parts by weight carbide slags；Magnesia is selected from least one of magnesite light burnt powder, dolomite light burnt powder and analysis pure zirconia magnesium.The method of the present invention can solve the atmosphere polluting problem that sulfur dioxide is brought, and industrial wastewater, industrial solid wastes can also be utilized to obtain qualified foaming thermal-insulating.
Description
Technical field
The present invention relates to a kind of manufacture method of foaming thermal-insulating, and in particular to one kind is based on mixed base desulfurization denitrification agent
Desulphurization denitration slurries (being also referred to as sometimes below " flue gas desulfurization and denitrification accessory substance ") and other wastes for being formed with ozone etc. come
The method for manufacturing foaming thermal-insulating.
Background technology
Adhere to requirement more and more higher of the people to building energy conservation, foaming thermal-insulating obtains tremendous development.On domestic market
It is organic heat-insulating sheet material mostly, such as EPS sheet and phenoplasts cystosepiment.It is organic heat-insulating sheet material poor durability, inflammable, and burn
When the gas that is discharged into air it is unfavorable to health of people, fire protecting performance is B levels, and inorganic heat insulation material is excellent resistance to due to its
Fire is more and more paid attention to by people.
CN103803943A discloses a kind of preparation method of exterior insulation.Its raw material weight percentage
Include flyash extraction aluminum oxide residue 30%~60%, talcum 5%~15%, gangue 5%~15%, fluxing agent molten 30%
~50% and appropriate auxiliary material.The patent document using flyash extraction aluminum oxide residue and gangue by being used as primary raw material
Exterior insulation is made, only coal ash lifting does not take the disposal of residue of aluminum and gangue and utilization to provide a kind of new way
Footpath, economic benefit and environmental benefit are added, so that exterior insulation has lightweight and the property of high-tensile
Can, but its cost or high, unsuitable large-scale promotion use.
CN102603357A discloses one kind using flyash as primary raw material, aids in Ninghai soil micro mist, talcum powder, and with
Glass dust is that furnace cooling obtains foamed ceramic after cosolvent sinters under 1230~1260 DEG C of oxidizing atmosphere and is incubated 0.5~2h
Warming plate.Gained exterior insulation is held one's breath porosity more than 75%, and tensile strength reaches 0.2MPa.This made preparation of method
Although bubble ceramic thermal insulation plate tensile strength values can obtain 0.2MPa or so, its mechanical property still needs to improve to meet to use need
Will.
In summary, prior art still cost is too high or performance is not high, however it remains to high-quality low cost, low energy consumption is built
The demand of material.
The content of the invention
It is an object of the invention to provide a kind of flue gas desulfurization and denitrification manufacture foaming thermal-insulating method, can with it is low into
Originally the foaming thermal-insulating of high-tensile is produced, while can also solve the atmosphere polluting problem that sulfur dioxide is brought.This
The another object of invention is the method for providing flue gas desulfurization and denitrification manufacture foaming thermal-insulating, further solves industrial wastewater
The Utilizing question of process problem and Industrial Solid Waste.
The method of the flue gas desulfurization and denitrification manufacture foaming thermal-insulating of the present invention comprises the following steps：
Desulphurization denitration step：Desulphurization denitration slurries are obtained using ozone and mixed base desulfurization denitrification agent wet-treating flue gas；
Blend step：Gained desulphurization denitration slurries and the raw material comprising industrial solid wastes, foaming agent and magnesia are mixed
Conjunction forms mixed slurry；With
Foam curing step：The mixed slurry is foamed, then temperature be 20~60 DEG C and humidity be 50~
Conserved 5~10 hours under conditions of 100%；
Wherein, the mixed base desulfurization denitrification agent includes 30~60 parts by weight magnesia, 20~50 parts by weight red muds and 20
~50 parts by weight carbide slags, the magnesia is selected from magnesite light burnt powder, dolomite light burnt powder and analyzes in pure zirconia magnesium extremely
Few one kind.
Method in accordance with the invention it is preferred that magnesia in the magnesite light burnt powder and the dolomite light burnt powder
Content is respectively 65wt%~85wt%.
Method in accordance with the invention it is preferred that the desulphurization denitration step include by the mixed base desulfurization denitrification agent with
Industrial wastewater is contacted to form the process of desulfurization denitrification agent slurries.
Contain method in accordance with the invention it is preferred that the desulphurization denitration step is included in ambient humidity more than 30%, flue gas
Moisture is between 10wt%~15wt% and keeps 50~80 DEG C of space, in the presence of having hydroxide ion making smelly
Chain reaction occurs for oxygen.
Method in accordance with the invention it is preferred that one or more of the flue gas in sintering machine, pelletizing and kiln.
Method in accordance with the invention it is preferred that the industrial solid wastes are selected from grain slag, slag, flyash and building rubbish
One or more in rubbish powder.
Method in accordance with the invention it is preferred that it is 0.5~2 that the industrial solid wastes, which are weight ratio,:1 slag and powder
Coal ash.
Method in accordance with the invention it is preferred that the foaming agent is selected from hydrogen peroxide, sodium acid carbonate, ammonium carbonate, azo first
One or more in acid amides and azodiisobutyronitrile.
Method in accordance with the invention it is preferred that desulphurization denitration slurries are 60~80 parts by weight, industrial solid wastes are 80~
100 parts by weight, foaming agent is 2~10 parts by weight and magnesia is 20~60 parts by weight.
Method in accordance with the invention it is preferred that the thermal conductivity factor of the foaming thermal-insulating is 0.06~0.28W/ (m
K)。
The present invention carries out flue gas desulfurization using red mud and carbide slag etc. as desulfurization denitrification agent, finds its desulfurization slurry obtained
Liquid is highly suitable for foaming thermal-insulating.The present invention directly mixes desulfurization slurry with industrial solid wastes, and passes through foaming
Legal system makes foaming thermal-insulating.Therefore, the present invention can prevent the secondary pollution problem of desulfurizing byproduct, and products obtained therefrom into
This is relatively low, is suitable for large-scale promotion use.
Embodiment
With reference to specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to
This.
In the present invention, unless otherwise stated, " part " refers to the number based on weight, " % " refers to hundred based on weight
Fraction.
As described herein, " foaming thermal-insulating " refers to the foam hole that closing is formed in inside concrete, makes concrete
Lighting and the material of thermal insulation separation thermalization.The thermal conductivity factor of the foaming thermal-insulating of the present invention is usually 0.06~0.28W/ (m
K), preferably 0.08~0.20W/ (mK), thermal resistance are about 10~20 times of normal concrete.The foaming thermal-insulating of the present invention
Dry volume density is usually 300~1600kg/m3, preferably 500~1000kg/m3, equivalent to portland cement concrete 1/5~
1/8 or so, building Integral Loading can be mitigated.The compression strength of the foaming thermal-insulating of the present invention is usually 0.6~
25.0MPa, preferably 4~10MPa.The water imbibition of the foaming thermal-insulating of the present invention is smaller, usually less than 10%, preferably 9%
Hereinafter, relatively independent closed air bubbles and good globality, make it have certain water resistance.
The manufacture method of the foaming thermal-insulating of the present invention includes desulphurization denitration step, blend step and foaming maintenance step
Suddenly.Introduce in detail below.
<Desulphurization denitration step>
The desulphurization denitration step of the present invention includes being taken off using ozone and mixed base desulfurization denitrification agent wet-treating flue gas
Sulphur denitration grout.In the present invention, " desulphurization denitration " is not strictly limited to only remove the sulfur dioxide and nitrogen oxides in flue gas,
Also include removing the thing that can be oxidized or absorb containing other in some other common acidic oxides and common flue gas
Matter, such as mercury, dust.
In the present invention, ozone forms high price nitrogen oxygen for the lower nitrogen oxides (such as NO) in synergistic oxidation flue gas
Compound (such as NO2、N2O5Deng), and further absorbed by water or alkaline matter.Preferably, the condition of ozone reaction is controlled, so as to enter
One step reduces the dosage of ozone.For example, it is 50~80 DEG C to control flue-gas temperature, preferably 60~70 DEG C, dust content can be 30
~50mg/Nm3, preferably 35~45mg/Nm3；Relative humidity is more than 30%, and preferably greater than 40%；Flue gas moisture content is
10wt%~15wt%, preferably 12wt%~13wt%.On this condition, ozone decomposed is slow, in addition, if slurries are in alkali
Property provide hydroxide ion, then humidity, temperature and hydroxide ion content are particularly suitable decomposites more hydroxyl radical free radicals,
And hydroxyl radical free radical is the material more stronger than ozone oxidation performance, can quickly by oxidation of nitric oxide into nitrogen dioxide, from
And save ozone usage.Further, hydroxyl radical free radical and the reaction of nitrogen oxides generation nitric acid and nitrous acid in flue gas.
In the present invention, mixed base desulfurization denitrification agent includes magnesia, red mud and carbide slag three or is only made up of three.
The desulfurizing agent of the present invention can use conventional method manufacture.Such as magnesia, red mud and carbide slag are well mixed and produced
Product.
Magnesia in mixed base desulfurization denitrification agent can be selected from magnesite light burnt powder, dolomite light burnt powder, analysis pure oxygen
Change at least one of magnesium.Preferably, the content of magnesia is 65wt% in magnesite light burnt powder and the dolomite light burnt powder
~85wt%, more preferably 70wt%~80wt%.Red mud refers to that aluminium industry extracts the contaminative waste residue discharged during aluminum oxide, its
With strong basicity, and contain the components such as substantial amounts of ferriferous oxide, calcium oxide, aluminum oxide, silica.Carbide slag is drying acetylene work
Carbide slag product caused by skill.The polished obtained granularity of carbide slag product can be less than to the finished product of 200 mesh.
According to an embodiment of the invention, desulfurization denitrification agent includes 30~60 parts by weight magnesia, 20~50 weight
Part red mud and 20~50 parts by weight carbide slags；For example, desulfurization denitrification agent includes 38~50 parts by weight magnesia, 30~35 parts by weight
Red mud and 30~35 parts by weight carbide slags.According to another implementation of the invention, desulfurization denitrification agent is by 35~55 parts by weight
Magnesia, 25~55 parts by weight red muds and 20~50 parts by weight carbide slags composition；For example, desulfurization denitrification agent is by 38~50 parts by weight
Magnesia, 30~35 parts by weight red muds and 30~35 parts by weight carbide slags composition.
" the desulphurization denitration slurries " of the present invention include certain moisture.Preferably, the content of water is 10~90wt%, preferably
20~80wt%, more preferably 30~75wt%.For example, 40wt%, 50wt%, 60wt% and 70wt% etc..
The desulphurization denitration step of the present invention can include pulping stage, smoke absorption step, plasma discharge step etc..
In the pulping stage of the present invention, include carrying out before processing to flue gas by mixed base desulfurization denitrification agent and Industry Waste
Water, such as alkaline waste water or acid waste water contact, so as to form desulfurization denitrification agent slurries.The use of desulfurization denitrification agent and industrial wastewater
Amount is not particularly limited, and the weight of desulfurization denitrification agent and industry water ratio is 1 under normal circumstances:(8~10), such as 1:9.
In the smoke absorption step of the present invention, make flue gas and desulfurization denitrification agent slurries (alkaline slurry) into desulfurizing tower
Contact, to absorb the sulfur dioxide in flue gas, and absorption product corresponding to formation.Sulfur dioxide in flue gas content can be 300
~20000mg/Nm3Between, preferably 100~2500mg/Nm3Between.Nitrogen oxides in effluent content can 100~
650mg/Nm3Between, preferably 300~500mg/Nm3Between.A certain amount of oxygen can be included in flue gas, the content of oxygen is usual
Between 8vol%~20vol%, preferably 9~18vol%, more preferably 12~18vol%.Flue gas is controlled in above-mentioned model
Enclose, desulfurization and denitration effect can be improved, and obtain the accessory substance of steady quality.
According to the smoke absorption step of the present invention, including when the pH value of desulfurization slurry is 6.5~7.5, is preferably 7.0,
Discharge it.Usually used equipment (such as excavationg pump) in the art can be used to carry out for the discharge of desulfurization slurry.
<Blend step>
The blend step of the present invention includes gained desulphurization denitration slurries and includes industrial solid wastes, foaming agent and oxidation
The raw material of magnesium is mixed to form mixed slurry.Any mixed media or mode known in the art can be used, as long as will can take off
Sulphur denitration grout is well mixed with raw material or reached as the mixability needed for foaming thermal-insulating.Mixing can be with container
Middle progress, the example of stainless steel include but is not limited to agitator, homogenizer, mixer etc..
In certain embodiments, blend step include by desulphurization denitration slurries, magnesia, industrial solid wastes and optionally
Additive be mixed evenly, this process typically continues 3min or so, afterwards in the case of above-mentioned slurry high-speed stirred
Foaming agent is added, continues 4~10s of stir about.
In the blend step of the present invention, the formula respectively formed is as follows：Desulphurization denitration slurries are 60~80 parts by weight, industry
Solid waste is 80~100 parts by weight, and foaming agent is 2~10 parts by weight and magnesia is 20~60 parts by weight.In some implementations
In scheme, desulphurization denitration slurries are 70~80 parts by weight, and industrial solid wastes are 95~100 parts by weight, and foaming agent is 5~8 weights
It is 25~50 parts by weight to measure part and magnesia.
In the present invention, the one or more of " industrial solid wastes " in grain slag, slag, flyash, building waste powder；
The preferably combination of the combination of the combination of grain slag and flyash, grain slag and slag or slag and building waste powder.According to this hair
A bright embodiment, it is 0.5~2 that the industrial solid wastes, which are selected from weight ratio,:1 slag and flyash；Weight ratio is
0.5~2:1 slag and grain slag；Weight ratio is 0.5~2:1 slag and building waste powder.
Flyash in the present invention is the fine ash that catching is got off in the flue gas after coal combustion, and flyash is coal-fired electricity
The key industry solid waste of factory's discharge.Slag is the slag of steel-making discharge, is divided into vessel slag, open hearth slag, electroslag according to the type of furnace.Water
Slag is rapidly cooled down and formed for the blast furnace slag of molten condition is placed in water, thus is different from slag.Building waste powder be with
Building waste is that raw material crushes the solid waste formed.
Foaming agent in the present invention is the material for making object material pore-forming, and the example includes CBA and physical blowing
Agent etc..Chemical substance of the CBA including the gases such as carbon dioxide and nitrogen can be discharged after heated decomposition.Physics is sent out
It is by the change of the physical aspect of a certain material that infusion, which includes foam pore, that is, passes through the expansion of compressed gas, liquid
Volatilization or the dissolving of solid and the material that is formed.The preferred CBA of the present invention, the example include but is not limited to hydrogen peroxide
(hydrogen peroxide), sodium acid carbonate, ammonium carbonate, azodicarbonamide and azodiisobutyronitrile；Preferably hydrogen peroxide.On the present invention can be used
State one kind in material, it is possible to use the two or more combinations in above-mentioned substance.
The foaming thermal-insulating of the present invention may also include additive, and its dosage can be 0.3~5 parts by weight, and preferably 0.5
~2 parts by weight.The additive can be selected from silicon rubber, polyester fiber, glass fibre, phosphoric acid, dihydric phosphate, the hydrogen of phosphoric acid one
One or more in salt, tartaric acid, tartrate or ATMP；Preferably dihydric phosphate or the hydrogen of phosphoric acid one
Salt.
In the present invention, the magnesia either as foaming thermal-insulating mixed material, or taken off as mixed base desulfurization
Magnesia in nitre agent can be respectively selected from least one in magnesite light burnt powder, dolomite light burnt powder and analysis pure zirconia magnesium
Kind.In certain embodiments, the magnesia as foaming thermal-insulating mixed material is with being used as in mixed base desulfurization denitrification agent
Magnesia it is identical.In certain embodiments, the magnesia as foaming thermal-insulating mixed material as mixed base with taking off
Magnesia in sulphur denitrfying agent is different.
<Foam curing step>
The foaming curing step of the present invention includes foaming mixed slurry, is then 20~60 DEG C, is preferably 30 in temperature
~50 DEG C, and humidity is 50~100%, is conserved 5~10 hours under conditions of preferably 60~80%, is preferably 6~8 hours.
In certain embodiments, sent out in the mixed slurry injection mould that foaming curing step of the invention includes obtaining
Bubble, reaches form removal after some strength.
In certain embodiments, curing step of the invention includes the foaming insulation board after form removal being placed into maintenance area
3~8h of initial curing is carried out, curing temperature is 20~60 DEG C, and humidity is 50~100%, then carries out natural curing 10~20 days
.Maintain equipment as usually used those in the art.
" part " in following examples represents parts by weight, unless specifically stated otherwise.Raw material, work used in following examples
Skill condition stub is as follows：
The composition of mixed base desulfurization denitrification agent is as follows with matching：The weight ratio of magnesia, red mud and carbide slag is 4:3:3.
The proportioning of mixed base desulfurization denitrification agent and alkaline waste water is as follows：The weight of desulfurization denitrification agent and alkaline waste water ratio is 1:
9。
- alkaline waste water：Its pH is 10 or so.
- flyash：Acid flyash (AFA), main component 50wt%SiO2, 25wt%Al2O3, 9wt%CaO).
- slag charge：Slag, main component 50wt%SiO2, 12wt%A12O3, 9wt%Fe2O3, 16wt%CaO).
- foaming agent：Hydrogen peroxide, technical grade, concentration 27.5%.
- additive：Sodium dihydrogen phosphate.
Foaming thermal-insulating is poured into a mould in 100 × 100 × 100mm template, the sample is dried/cold
Freeze, and tested according to JG/T266-2001.
Embodiment 1
Mixed base desulfurization denitrification agent is added into alkaline waste water, so as to form desulfurization nitre agent slurries, and delivered in desulfurizing tower.Cigarette
Gas (oxygen content 18vt%) enters desulfurizing tower from the gas approach of desulphurization denitration tower, after absorbing spraying layer, absorbs two
Sulfur oxide gas, then flue gas enter ozone steam absorbed layer, herein nitric oxide be oxidized to nitrogen dioxide and five oxidation
The nitrogen oxides of the high-valence states such as phenodiazine, the slurries containing magnesium hydroxide that spraying layer ejection is absorbed by the second layer absorb, while dioxy
Change sulphur to continue to be absorbed in this region, remaining a small amount of sulfur dioxide and nitrogen oxides are absorbed by third layer and sprayed in last flue gas
The slurries that layer sprays are to absorbing, and flue gas is directly discharged by the exhanst gas outlet through top chimney after demisting afterwards；
The absorption product that desulfurization denitrification agent slurries are formed after sulfur dioxide absorption is introduced into desulfurizing tower by Action of Gravity Field
It is interior in the tower of bottom in slurries circulating slot.
The slurries of slurries circulating slot bottom are discharged when pH reaches 7.0 through excavationg pump in tower, are then fed into the outer slurries storage of tower
Desulphurization denitration slurries are used as in storage；The slurries on slurries circulating slot top deliver to absorption spray by slurry circulating pump respectively in tower
Layer, internal circulating load account for the 50vt% of output total amount.
Shown in the following Tables 1 and 2 of flue gas desulfurization operating mode.
Table 1, desulphurization denitration duty parameter
| Sequence number | Project | Quantity | Unit |
| 1 | Inlet flue gas amount (operating mode) | 996854 | m3/h |
| 2 | Entrance standard state exhaust gas volumn | 649502 | m3/h |
| 3 | Inlet temperature | 146 | ℃ |
| 4 | Sulfur dioxide entrance concentration | 2160 | mg/Nm3 |
| 5 | Nitrogen oxides entrance concentration | 435 | mg/Nm3 |
| 6 | Entrance dust concentration | 116 | mg/Nm3 |
| 7 | Magnesium sulphur ratio | 1.05 | |
| 8 | Humidity of flue gas | 9.5 | Wt% |
Table 2, desulphurization denitration emission behaviour
| Sequence number | Project | Quantity | Unit |
| 1 | Exiting flue gas amount (operating mode) | 685234 | m3/h |
| 2 | Export standard state exhaust gas volumn | 588267 | m3/h |
| 3 | Exhaust gas temperature | 45 | ℃ |
| 4 | Sulfur dioxide emissioning concentration | 40 | mg/Nm3 |
| 5 | Desulfuration efficiency | 98.32 | % |
| 6 | Discharged nitrous oxides concentration | 34 | mg/Nm3 |
| 7 | Denitration efficiency | 92.92 | % |
| 8 | Export dust concentration | 9.8 | mg/Nm3 |
By slag charge, (specific surface area is about 500m2/ kg), flyash, magnesia and additive be sent into mixer, Ran Houyu
Desulphurization denitration slurries are mixed evenly, and mixing time is 30 minutes, then while high-speed stirred, add hydrogen peroxide, hold
Continuous stirring 5 seconds.Foamed with injecting slurry in mould, after the completion of injection molding at 30 DEG C of temperature and 60% damp condition
Initial curing 8h is carried out, is stripped afterwards, required specification is cut into after the demoulding, then natural curing 15 days or so, that is, foamed
Board finished product is incubated, and delivers to packing machine and is packed.The formula of foaming thermal-insulating is as shown in table 3.The test result such as institute of table 4
Show.
The formula of table 3, foaming insulation board
| Name of material | Desulphurization denitration slurries | Slag charge | Flyash | Magnesia | Hydrogen peroxide | Additive |
| Specification (kg) | 75 | 40 | 55 | 29.5 | 5 | 0.5 |
The performance of table 4, foaming insulation board
| Water absorption rate/% | Dry density/(kg/m3) | Intensity/MPa | Thermal conductivity factor/(W/ (mK)) |
| 6.8 | 480 | 3.5 | 0.085 |
Embodiment 2
Except the formula using table 5, remaining condition are same as Example 1.The performance test results are referring to table 6.
The formula of table 5, foaming insulation board
| Name of material | Desulphurization denitration slurries | Slag charge | Flyash | Magnesia | Hydrogen peroxide | Additive |
| Specification (kg) | 80 | 40 | 55 | 44.5 | 5 | 1.5 |
The performance of table 6, foaming insulation board
| Water absorption rate/% | Dry density/(kg/m3) | Intensity/MPa | Thermal conductivity factor/(W/ (mK)) |
| 7.4 | 760 | 6.3 | 0.13 |
Embodiment 3
Except the formula using table 7, remaining condition are same as Example 1.The performance test results are referring to table 8.
The formula of table 7, foaming insulation board
| Name of material | Desulphurization denitration slurries | Slag charge | Flyash | Magnesia | Hydrogen peroxide | Additive |
| Specification (kg) | 75 | 50 | 35 | 49.5 | 5 | 1.5 |
The performance of table 8, foaming insulation board
| Water absorption rate/% | Dry density/(kg/m3) | Intensity/MPa | Thermal conductivity factor/(W/ (mK)) |
| 8.6 | 650 | 4.7 | 0.11 |
The present invention is not limited to above-mentioned embodiment, in the case of without departing substantially from the substantive content of the present invention, this area skill
Any deformation, improvement, the replacement that art personnel are contemplated that each fall within the scope of the present invention.
Claims (10)
- A kind of 1. method of flue gas desulfurization and denitrification manufacture foaming thermal-insulating, it is characterised in that comprise the following steps：Desulphurization denitration step：Desulphurization denitration slurries are obtained using ozone and mixed base desulfurization denitrification agent wet-treating flue gas；Blend step：Gained desulphurization denitration slurries are mixed into shape with the raw material comprising industrial solid wastes, foaming agent and magnesia Into mixed slurry；WithFoam curing step：The mixed slurry is foamed, is then 20~60 DEG C in temperature and humidity is 50~100% Under the conditions of conserve 5~10 hours；Wherein, the mixed base desulfurization denitrification agent includes 30~60 parts by weight magnesia, 20~50 parts by weight red muds and 20~50 Parts by weight carbide slag, the magnesia selected from magnesite light burnt powder, dolomite light burnt powder and analysis pure zirconia magnesium at least one Kind.
- 2. according to the method for claim 1, it is characterised in that in the magnesite light burnt powder and the dolomite light burnt powder The content of magnesia is respectively 65wt%~85wt%.
- 3. according to the method for claim 1, it is characterised in that the desulphurization denitration step is included the mixed base desulfurization Denitrfying agent is contacted with industrial wastewater to form the process of desulfurization denitrification agent slurries.
- 4. according to the method for claim 3, it is characterised in that the desulphurization denitration step is included in ambient humidity and exceeded 30%th, humidity of flue gas between 10wt%~15wt% and keeps 50~80 DEG C of space, having existing for hydroxide ion In the case of make ozone occur chain reaction.
- 5. according to the method for claim 3, it is characterised in that the flue gas in sintering machine, pelletizing and kiln one Kind is a variety of.
- 6. according to the method for claim 3, it is characterised in that the industrial solid wastes are selected from grain slag, slag, flyash With the one or more in building waste powder.
- 7. according to the method for claim 6, it is characterised in that the industrial solid wastes are that weight ratio is 0.5~2:1 Slag and flyash.
- 8. according to the method for claim 7, it is characterised in that the foaming agent is selected from hydrogen peroxide, sodium acid carbonate, carbonic acid One or more in ammonium, azodicarbonamide and azodiisobutyronitrile.
- 9. according to the method for claim 1, it is characterised in that desulphurization denitration slurries are 60~80 parts by weight, industrial solid Waste is 80~100 parts by weight, and foaming agent is 2~10 parts by weight and magnesia is 20~60 parts by weight.
- 10. according to the method described in any one of claim 1~9, it is characterised in that the thermal conductivity factor of the foaming thermal-insulating For 0.06~0.28W/ (mK).
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| CN113666679A (en) * | 2021-08-27 | 2021-11-19 | 中晶环境科技股份有限公司 | Method for producing building material by using desulfurization and denitrification byproducts |
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