CN107602046A - The method of flue gas desulfurization and denitrification production foaming thermal-insulating based on red mud - Google Patents
The method of flue gas desulfurization and denitrification production foaming thermal-insulating based on red mud Download PDFInfo
- Publication number
- CN107602046A CN107602046A CN201711063292.3A CN201711063292A CN107602046A CN 107602046 A CN107602046 A CN 107602046A CN 201711063292 A CN201711063292 A CN 201711063292A CN 107602046 A CN107602046 A CN 107602046A
- Authority
- CN
- China
- Prior art keywords
- weight
- foaming
- agent
- slurries
- flue gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a kind of method of the flue gas desulfurization and denitrification production foaming thermal-insulating based on red mud.The desulfurization denitrification agent being made up of red mud, carbide slag, magnesia and sodium hydroxide addition alkaline industrial waste water is prepared into desulfurization denitrification agent slurries；Make desulfurization denitrification agent slurries and ozone and smoke contacts, to form absorption slurries；Slurries are discharged when the pH value for absorbing slurries is down to 6.5~7.5 scope, obtain desulphurization denitration slurry；Raw material comprising desulphurization denitration slurry, magnesia, industrial solid wastes, foaming agent and additive is mixed, and carries out foaming；Then conserved 3~8 hours under conditions of temperature is 20~60 DEG C and humidity is 50~100%.The method of the present invention can solve the atmosphere polluting problem that sulfur dioxide and nitrogen oxides are 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 production method of foaming thermal-insulating, and in particular to a kind of desulfurization based on red mud and ozone
The method that denitration slurry and other wastes etc. produce foaming thermal-insulating.
Background technology
With the propulsion built a conservation-minded society, the requirement more and more higher for building energy conservation, environment-friendly energy-saving material
Research and development be one of important directions.
Foam cement insulation material is that foam caused by foaming agent is introduced into cement paste or the cement-fly ash water such as slurry only
In cement-based material, the light heat insulation material containing a large amount of sealed porositys of foamed shaping and maintenance formation.Inorganic foamed cement is wide
The one kind for belonging to foam concrete in justice, but it is general do not mix sandstone etc. and gather materials, even if a small amount of inorganic lightweight aggregate of incorporation also not
Skeleton structure as load-bearing.Inorganic foamed cement insulation product has quality as another novel inorganic external-wall heat-insulation material
Gently, the excellent properties such as insulation, fire prevention, sound insulation, antidetonation and good endurance, it is the ep-type material given priority to now.
CN103304200A discloses a kind of foam concrete and preparation method thereof, and where it is proposed in-situ chemical foaming
Concept, the higher foaming haydite lightweight concrete of strength grade can be obtained, but only by chemical blowing and use haydite to be light thick
Aggregate can not obtain unit weight and be less than 500kg/m3Lightweight concrete sill.In addition, used in current inorganic heat insulation mortar
Glass bead is as thin lightweight aggregate, and cement is as binder materials, to reduce the unit weight of inorganic heat insulation mortar, using reducing cement
Dosage uses high molecular polymer as supplementary cementitious material with a large amount of, although the inorganic heat insulation mortar unit weight obtained can reach
400kg/m3Hereinafter, and there is ideal heat insulation effect, but because uses substantial amounts of high molecular polymer to aid in glue
Gel material, closed-cell expanded glass bead are light fine aggregate, the cost of thermal insulation mortar is remained high, also result in thermal insulation mortar in addition
Weatherability and durability it is undesirable.
In summary, the technique that cost produces low unit weight foaming thermal-insulating lower is present needed exist for.
The content of the invention
It is an object of the invention to provide a kind of method of the flue gas desulfurization and denitrification production foaming thermal-insulating based on red mud.
An aspect of of the present present invention, taken off by the desulfurization denitrification agent and ozone oxidation that are made up of red mud, carbide slag, magnesia and sodium hydroxide
The combination of the technologies such as nitre, the simultaneous removing nitrogen oxides in flue gas desulfurization course, desulphurization denitration collaboration are efficiently carried out.This method has
There is the characteristics of desulphurization denitration dosage is small, cost is low, denitrification efficiency is high, stable.On the other hand, desulphurization denitration material is utilized
Starch and combine waste water, the foaming thermal-insulating density of solid waste production is less than 750kg/m3, environmental pollution low with cost
The advantages of small.Specifically, the present invention includes herein below.
A kind of method of the flue gas desulfurization and denitrification production foaming thermal-insulating based on red mud, it is characterised in that including following
Step：
(1) pulping stage：The desulfurization denitrification agent being made up of red mud, carbide slag, magnesia and sodium hydroxide is added into pH value
Desulfurization denitrification agent slurries are prepared for 10~12 industrial wastewater；
(2) desulphurization denitration step：Make the desulfurization denitrification agent slurries and ozone and smoke contacts, to form absorption slurries；
(3) plasma discharge step：Slurries are discharged when the pH value of the absorption slurries is down to 6.5~7.5, obtain desulphurization denitration material
Slurry；
(4) forming step：The original of desulphurization denitration slurry, magnesia, industrial solid wastes, foaming agent and additive will be included
Material mixing, and foaming is carried out, so as to obtain foaming body；Wherein, the desulphurization denitration slurry is 100~110 parts by weight, institute
It is 25~35 parts by weight to state magnesia, and the industrial solid wastes are 25~55 parts by weight, and the foaming agent is 2~10 weight
Part, and the additive is 2~10 parts by weight；
(5) curing step：The foaming body is supported under conditions of temperature is 20~60 DEG C and humidity is 50~100%
Shield 3~8 hours.
According to method of the present invention, it is preferable that include 6~50wt% calcium oxide, 2~10wt% oxygen in the red mud
Change sodium, 5~20wt% aluminum oxide and 5~50wt% iron oxide, in the carbide slag content of calcium hydroxide for 80wt%~
90wt%, and the content of activated magnesia is more than 60% in the magnesia.
According to method of the present invention, it is preferable that the red mud is 30~70 parts by weight, and the carbide slag is 30~70
Parts by weight, the magnesia is 1~40 parts by weight, and the sodium hydroxide is 0.1~30 parts by weight.
According to method of the present invention, it is preferable that the weight ratio of the desulfurization denitrification agent and the industrial wastewater is 1:6
~10.
According to method of the present invention, it is preferable that the content of the sulfur dioxide in flue gas is 300mg/Nm3With up to
3000mg/Nm3Hereinafter, the content of nitrogen oxides is 200mg/Nm3With up to 500mg/Nm3Hereinafter, and oxygen content be 10~
20vol%.
According to method of the present invention, it is preferable that the ozone is 40 DEG C~70 with the temperature during smoke reaction
DEG C, and be 1~15wt% with the concentration of ozone during smoke contacts.
According to method of the present invention, it is preferable that the industrial solid wastes be selected from clinker, slag, steel slag and iron slag,
Flyash, land plaster, the one or more of dolomite dust and shale powder.
According to method of the present invention, it is preferable that it is 1 that the industrial solid wastes, which are selected from weight ratio,:0.8~1.5
The mixture of slag and flyash.
According to method of the present invention, it is preferable that the foaming agent is selected from hydrogen peroxide, sodium acid carbonate, ammonium carbonate, idol
One or more in azodicarbonamide and azodiisobutyronitrile.
According to method of the present invention, it is preferable that the additive is selected from water reducer, early strength agent, retarder, foam stabilizing
One or more in agent, air entraining agent and hydrophober.
The method of the present invention manufactures foaming thermal-insulating using industrial wastewater, solid waste, makes industrial solid wastes
All obtain cycling and reutilization.The method of the present invention had both saved foaming thermal-insulating investment, greatly reduced desulphurization denitration fortune again
Row cost.Foaming thermal-insulating produced by the invention adds a large amount of industrial residues, and main component magnesium sulfate is by after desulfurization
Waste liquid be prepared, belong to desulfuration byproduct, it is cheap, significantly reduce production cost, and produce obtained material
Material density rating is less than 750kg/m3。
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, " % " and " wt% " refers to be based on
The percentage of weight." vol% " refers to the percentage based on volume.
Number range in the present invention, it is thus understood that specifically disclose the scope upper and lower bound and they between
Each median.Median and any other statement value in any statement value or stated ranges or in the scope
Each less scope between median is also included within the disclosure.These small range of upper and lower bounds can be wrapped independently
Include or exclude in the range of.
The thermal conductivity factor of the foaming thermal-insulating of the present invention is usually 0.01~0.20W/ (mK), and thermal resistance is about common mixed
10~20 times of solidifying soil.The density of the foaming thermal-insulating of the present invention is usually 200~900kg/m3, preferably 300~800kg/
m3, equivalent to 1/5~1/8 or so of portland cement concrete, building Integral Loading can be mitigated.The foamed heat insulating material of the present invention
The compression strength of material is usually 1.0~10.0MPa, preferably 1.1~5.0MPa.The present invention foaming thermal-insulating water imbibition compared with
Small, usually less than 10%, preferably less than 9%, relatively independent closed air bubbles and good globality make it have certain
Water resistance.
In order to further reduce the cost of production foaming thermal-insulating, the present inventor creatively by fume treatment slurries and
Industrial solid wastes are combined, and are found by using the de- of the magnesia of specific proportioning, red mud, carbide slag and sodium hydroxide composition
Cooperative effect can be produced when sulphur denitrfying agent and ozone are to handle flue gas, so that with higher efficiency desulphurization denitration, while obtain
Desulphurization denitration slurry can also be combined with other industrial solid wastes, manufacture the low-density foamed insulation material of high-quality.Specifically, originally
The manufacture method of invention includes pulping stage, desulphurization denitration step, plasma discharge step, forming step and curing step.Carry out below
It is discussed in detail.
Pulping stage：
The desulfurization denitrification agent being made up of red mud, carbide slag, magnesia and sodium hydroxide is added into industrial wastewater, is well mixed
Obtain desulfurization denitrification agent slurries.The dosage of carbide slag is 30~70 parts by weight, preferably 35~65 parts by weight；The dosage of magnesia is
1~40 parts by weight, preferably 10~35 parts by weight；The dosage of red mud is 30~70 parts by weight, preferably 35~65 parts by weight；Hydroxide
The dosage of sodium is 0.1~30 parts by weight, preferably 5~25 parts by weight.The pH value of industrial wastewater is preferably 10~12, more preferably 11~
12.The weight of desulfurization denitrification agent and industrial wastewater ratio is usually 1:5~10, preferably 1:9.Desulfurization denitrification agent slurries it is main into
It is divided into magnesium hydroxide, calcium hydroxide (Ca (OH)2) etc..
The carbide slag of the present invention is the discarded object discharged during acetylene production.Preferably, carbide slag of the invention is aqueous
Amount is down to 30~40wt%, in powdery.The desulfurization that inventor has found to be made up of carbide slag, red mud, magnesia and sodium hydroxide takes off
The active calcium ion content is higher in nitre agent, and better than the active calcium ion content in independent carbide slag or common lime stone.In addition, the present invention
In desulfurization denitrification agent the calcium hydroxide of carbide slag in activity and specific surface area on than independent carbide slag or Conventional calcination lime
Calcium hydroxide caused by hydrolysis is high-quality after stone, and confirms that the desulphurizing ability of carbide slag in the desulfurization denitrification agent of the present invention is higher than hydrogen-oxygen
Change calcium.Preferably, the content of calcium hydroxide is more than 80wt% in carbide slag of the invention.
What the red mud of the present invention was discharged when being alumina producing contains offscum in alkali, and the basicity of red mud liquid is 3000~15000mg/
L.Preferably, 6~50wt% calcium oxide, 2~10wt% sodium oxide molybdenas, 5~20wt% aluminum oxide and 5 are included in red mud of the invention
~50wt% iron oxide.Each component content in the range of this causes red mud to have more useful desulfurized effect.It is further preferred that
The content of di-iron trioxide is more than 30wt% in the red mud of the present invention, and the ferric oxide in the range of this can be with hydrated ferric oxide shape
Formula is present, and it is to H2S has very strong adsorption capacity.
The present invention magnesia (MgO) selected from magnesite light burnt powder, dolomite light burnt powder, analysis pure zirconia magnesium at least
It is a kind of.The content of magnesia is 65%-85% in preferable magnesite light burnt powder and the dolomite light burnt powder.Preferably, oxygen
Change the activated magnesia for including more than 50wt% in magnesium, more preferably more than 60wt% activated magnesia.
The sodium hydroxide of the present invention is usually used any product in the art.For example, commercially available commodity can be used.
Carbide slag, red mud and magnesia are preferably powdered granule thing in the present invention.It is highly preferred that carbide slag, red mud and oxygen
Change the granularity of magnesium to be more than 200 mesh.In carbide slag of the granularity in the range of this, particle is smaller, and specific surface area is larger, is advantageous to improve
The contact area of ozone, desulfurization denitrification agent etc. and flue gas, while be advantageous to improve to sulfur dioxide in flue gas (SO2) and nitrogen oxidation
Thing (NOX) adsorption function, further improve desulphurization denitration efficiency.Preferably, above-mentioned raw materials are entered using Ball Mill System
Row ball milling is so that its granularity is more than 200 mesh.
Desulphurization denitration step：
The desulphurization denitration step of the present invention includes making the desulfurization denitrification agent slurries and ozone and smoke contacts.When the cigarette
When gas is with desulfurization denitrification agent slurry liquid contacts, the titanium dioxide in magnesium hydroxide, calcium hydroxide and flue gas in desulfurization denitrification agent slurries
Reaction of Salmon-Saxl forms sulphite, sulfate.When contact start, the content of sulfur dioxide in flue gas is 3000mg/Nm3Hereinafter,
It is preferred that 1000mg/Nm3Hereinafter, such as 900mg/Nm3Below.On the other hand, preferably 500mg/Nm3More than, such as 700mg/
Nm3More than.The content of sulfur dioxide is too low, then the content deficiency of the magnesium sulfate generated in desulfurization slurry, influences the lightweight of manufacture
The performance of concrete product.
In the manufacture method of the present invention, when contact start, oxygen content is 10~20vol% in flue gas.This scope
Interior oxygen content is advantageous to sulphite, and further reaction is oxidized to sulfate.Oxygen content is too low, in the desulfurization slurry manufactured
Sulphite is too high, and the performance for being unfavorable for foaming thermal-insulating improves.In certain embodiments, in order to improve oxygen in flue gas
Content, oxygenation means can be used, such as blast air or oxygen.
It should be noted that above-mentioned content of sulfur dioxide and the scope of oxygen content refer to when flue gas first with desulphurization denitration
Content during agent slurry liquid contacts, can further it be reduced with the above-mentioned content of carry out of reaction.
In the manufacture method of the present invention, when contact start, the amount of nitrogen oxides in flue gas is 500mg/Nm3With
Under, preferably 100mg/Nm3More than.The scope of above-mentioned amount of nitrogen oxides refer to when flue gas first with content during ozone contact,
Can further it be reduced with the above-mentioned content of carry out of reaction.Preferably, ozone and temperature during smoke contacts are 40~70 DEG C, excellent
Select 50~65 DEG C.Be advantageous to ozone and NO in this temperature rangeXReaction, so as to be advantageous to improve denitration efficiency.Ozone with
The water capacity of flue gas is preferably 10wt%~15wt% during smoke contacts.Water capacity in the range of this can ensure there are being a large amount of hydrogen
Oxygen radical ion reacts chain reaction in the case of existing, and more hydroxyl radical free radicals is generated, so as to which ozone usage be greatly decreased.
In the manufacture method of the present invention, when contact start, the concentration of ozone is in 1~15wt%, preferably 5~10wt% models
In enclosing.From the aspect of economy and denitration efficiency, more preferably ozone concentration is 10wt%.Ozone concentration herein refers to by smelly
The concentration of ozone caused by Oxygen Generator.
It should be noted that one kind in coal-burning boiler, sintering machine, pelletizing and kiln is may be from according to the flue gas of the present invention
Or a variety of, the one or more being preferred from sintering machine, pelletizing and kiln.As long as sulfur dioxide in flue gas content, oxygen content
With nitrogen oxides in above-mentioned prescribed limit, then it is not specific limit flue gas source.The flue gas of the present invention and specified raw material and spy
The foaming thermal-insulating that determining the combination of amount ranges obtains manufacture meets required performance requirement.
Although being illustrated it should also be noted that, desulfurization and denitration are divided into single two steps herein,
Actually desulfurization can be carried out simultaneously with denitration.When carrying out simultaneously, denitrification efficiency is higher.Inventor speculates that reason may be
NO is NOx main component in flue gas, and it is insoluble in water.It is oxidized when ozone and NO react as NO2Or N2O5Deng high price
The nitrogen oxides of state, the nitrogen oxides of these high-valence states is easily absorbed by water or alkaline matter, so as to promote denitrification process.Separately
Outside, above-mentioned oxidizing process also generates oxygen, and it is sulfate that it, which further promotes sulfite oxidation,.Therefore, based on carbide slag
The combination acts synergistically of desulfurization denitrification agent and ozone, promote the progress of desulphurization denitration.
It need to be controlled in 30~50mg/Nm according to dust content in the flue gas of the present invention3Scope.Dust content in the range of this
The reaction for being advantageous to ozone and NOx is carried out.Dust content is too high, and denitration efficiency reduces, and possible cause is the powder of too high amount
Dirt may adsorb part ozone.
Any means known in the art can be used to produce for the ozone of the present invention.For example, occurred by using ozone
Device produces.In addition, ozone can by any device, such as high pressure nozzle supply with smoke contacts.The pressure of high pressure nozzle
Range preferably from 0.8~0.9Mpa.
Plasma discharge step：
The slurries obtained after above-mentioned desulfurization and denitrification step are absorption slurries.With the progress of desulphurization denitration, absorb
The pH of slurries is reduced.Slurries are discharged when the pH value for absorbing slurries is down to 6.5~7.5, obtain desulphurization denitration slurry.By pH value control
The content of system magnesium sulfate in the scope, one side absorption slurry is higher, and the performance for being advantageous to resulting product improves.On the other hand
The desulfurization denitrification agent slurries more renewed by plasma discharge are advantageous to keep high desulfuration efficiency.
Forming step：
The forming step of the present invention includes that 100~110 parts by weight desulphurization denitration slurries, the oxidation of 25~35 parts by weight will be included
The raw material mixing of magnesium, 25~55 parts by weight industrial solid wastes, 2~10 parts by weight of blowing agent and 2~10 parts by weight additives, and
Carry out foaming and obtain foaming body.By each Composition Control within the above range, the performance of resulting product of the present invention can be improved.
The industrial solid wastes of the present invention are preferably the one or more in clinker, slag, steel slag and iron slag and useless ash.
In some embodiments, the one or more of useless ash of the invention in flyash, land plaster, dolomite dust and shale powder.
Industrial solid wastes are preferably slag and flyash, are selected from weight ratio as 1:0.8~1.5, preferably 1:1~1.2 ore deposit
The mixture of slag and flyash.
The industrial solid wastes of the present invention are particle, it is preferable that control the granularity of industrial solid wastes more than 200 mesh.
Because the slag charge granularity of separate sources is larger and granularity heterogeneity is, it is necessary to carry out powdered and homogenization.It is therefore preferred that this
Also include the process for being ground industrial solid wastes such as slag charge before the mixing of invention, with ensure granularity 200 mesh with
On.In the present invention, mesh number is bigger, and particle diameter is smaller.
The foaming agent of the present invention is the material for making object pore-forming, and example includes but is not limited to hydrogen peroxide (hydrogen peroxide), carbon
One or more in sour hydrogen sodium, ammonium carbonate, azodicarbonamide and azodiisobutyronitrile；Preferably hydrogen peroxide.Foaming agent
Dosage is usually 2~10 parts by weight.Preferably 3~10 parts by weight.
The additive of the present invention is usually used material in the art, including but not limited to water reducer, early strength agent, slow setting
Agent, foam stabilizer, air entraining agent and hydrophober.The example of additive includes silicon rubber, polyester fiber, glass fibre, phosphoric acid, di(2-ethylhexyl)phosphate
Hydrogen salt, dibasic alkaliine, tartaric acid, tartrate and aminotrimethylene phosphoric acid.One in the usable above-mentioned substance of the present invention
Kind is applied in combination two or more.
The forming step of the present invention can use any mixing known in the art and foaming means or mode.The present invention's
Mixing apparatus can be single shaft mixer, double-shaft mixer or mixer.Preferably, mixing apparatus of the invention is mixer.
The foaming machine of the present invention can use the conventional mould of work.
In the present invention, magnesia, industrial solid wastes and additive etc. can first be mixed with desulphurization denitration slurry, so
After add foaming agent.In an exemplary embodiment, stir speed (S.S.) not preferably less than 600r/min, and should not being higher than during mixing
1800r/min, after adding foaming agent, mixing time can be 4~10s, preferably 5~8s.
Curing step：
The curing step of the present invention includes being 20~60 DEG C, being preferably 30~50 DEG C in temperature by foaming body, and humidity is
50~100%, be preferably 60~80% under conditions of conserve 3~10 hours, preferably 3~8 hours.
In certain embodiments, curing step of the invention is included the foaming body (such as foaming insulation board) after form removal
It is placed into maintenance area and carries out 3~8h of initial curing, curing temperature is 20~60 DEG C, and humidity is 50~100%, then carries out nature
Maintenance 10~20 days.Maintain equipment as usually used those in the art.
The present invention can also include other steps, for example, demoulding step and cutting step.Demoulding step includes pending soaked
Mud insulation material completes maintenance flow, can be stripped when possessing early strength.Cutting step is the foaming that will be provided with some strength
It can be cut after the demoulding of cement heat preserving blanks, cut form adjusts cutting blade progress as needed.
In following examples, foaming thermal-insulating is poured into a mould in 100 × 100 × 100mm template, to the sample
It is dried/freezes, and is tested according to JG/T266-2001.
Embodiment 1
(1) modulation of desulfurization denitrification agent
Each component is well mixed according to formula as below, obtains desulfurization denitrification agent.
Table 1-1 desulfurization denitrification agents composition and dosage
(2) technique of desulphurization denitration waste liquid production foaming thermal-insulating is utilized
Desulfurization denitrification agent is added into alkaline industrial waste water (pH 10, from chemical plant；The two part by weight is 1:9) it is made
Desulfurization denitrification agent slurries, and be pumped in desulfurizing tower, for absorbing the sulfur dioxide during spraying zone absorbs flue gas in sulfur dioxide.
The flue gas for coming from coal-burning boiler enters inside desulfurizing tower from smoke inlet.In flue gas uphill process, with dioxy
Change sulphur and absorb spraying zone contact, flue gas is discharged from the exhanst gas outlet at the top of desulfurizing tower.Sulfur dioxide absorbs spraying zone spray desulfurization
Denitrfying agent slurries are to absorb the sulfur dioxide in flue gas.
Ozone is delivered to ozone steam oxidation reaction layer after the pressurization of ozone delivery pump, and sprays downwards, preliminary purification
In uphill process with ozone counter current contacting oxidation reaction occurs for flue gas, is height by the part lower nitrogen oxides in flue gas
Valency nitrogen oxides, form ozone oxidation flue gas；
Ozone oxidation flue gas continues to rise, the alkaline slurry counter current contacting ejected with absorbing spraying layer, ozone oxidation cigarette
Nitrogen oxides and the sulfur dioxide not eliminated and alkaline slurry generation neutralization reaction in gas, are obtained containing nitrite, nitric acid
The absorption product of salt and sulphite, and formed ozone oxidation desulphurization denitration flue gas；
The absorption product that desulfurization denitrification agent slurries are formed after sulfur dioxide absorption, then be imported into through excavationg pump in slurry tank
Storage.
Above-mentioned slurries enter mixer, by collected from the clinker (50wt%SiO of steel mill2, 12wt%A12O3, 9wt%
Fe2O3, 16wt%CaO) and to be ground into specific surface area be 400m2/ kg powder, the flyash collected from steel mill, foaming agent (mistake
Hydrogen oxide, technical grade, 27.5%) it is sent into mixer with additive (sodium dihydrogen phosphate) and is stirred mixing.
It is in mixer, above-mentioned material stirring is uniform, mixing speed 1600rpm, by the casting equipment that foams
Shaping, is dried through drying machine, and cutting machine is cut, and is put in storage after packaged machine packaging.
Flue gas desulfurization and denitrification operating mode is referring to table 1 below -2 and table 1-3.Formula and the performance test results ginseng of foaming thermal-insulating
It is shown in Table 1-4 and table 1-5.
Table 1-2 flue gas desulfurization and denitrification duty parameters
| Sequence number | Project | Quantity | Unit |
| 1 | Inlet flue gas amount (operating mode) | 1172078 | m3/h |
| 2 | Standard state exhaust gas volumn | 791361 | Nm3/h |
| 3 | Inlet temperature | 138 | ℃ |
| 4 | Sulfur dioxide entrance concentration | 1000 | mg/Nm3 |
| 5 | Nitrogen oxides entrance concentration | 470 | mg/Nm3 |
| 6 | Entrance flue dust | 110 | mg/Nm3 |
| 7 | Humidity of flue gas | 5.3 | Wt% |
Table 1-3 desulphurization denitration emission behaviours
| Sequence number | Project | Quantity | Unit |
| 1 | Exiting flue gas amount (operating mode) | 894493 | m3/h |
| 2 | Exhaust gas temperature | 60 | ℃ |
| 3 | Sulfur dioxide emissioning concentration | 25 | mg/Nm3 |
| 4 | Discharged nitrous oxides concentration | 48 | mg/Nm3 |
| 5 | Desulfuration efficiency | 98.5 | Wt% |
| 6 | Denitration efficiency | 89.5 | Wt% |
| 7 | Export dust concentration | 11 | mg/Nm3 |
The material proportion and the performance test results for the foaming thermal-insulating that embodiment 1 produces are as follows：
The formula of table 1-4 foaming thermal-insulatings
| Name of material | Denitration desulfurization slurry | Magnesia | Slag | Flyash | Foaming agent | Additive |
| Specification (kg) | 100 | 30 | 20 | 30 | 5 | 5 |
The performance test results of table 1-5 foaming thermal-insulatings
| Compression strength (MPa) | Density (kg/m3) | Thermal conductivity factor (W/mK) | Water absorption rate (%) |
| 3.2 | 300 | 0.081 | 22.4 |
Embodiment 2
It is same as Example 1 in addition to following formulas or step.
(1) modulation of desulfurization denitrification agent
Each component is well mixed according to formula as below, obtains desulfurization denitrification agent.
Table 2-1 desulfurization denitrification agents composition and dosage
Flue gas desulfurization and denitrification operating mode is referring to table 2 below -2 and table 2-3.Formula and the performance test results ginseng of foaming thermal-insulating
It is shown in Table 2-4 and table 2-5.
Table 2-2 flue gas desulfurization and denitrification duty parameters
| Sequence number | Project | Quantity | Unit |
| 1 | Inlet flue gas amount (operating mode) | 1156075 | m3/h |
| 2 | Standard state exhaust gas volumn | 796364 | Nm3/h |
| 3 | Inlet temperature | 135 | ℃ |
| 4 | Sulfur dioxide entrance concentration | 985 | mg/Nm3 |
| 5 | Nitrogen oxides entrance concentration | 445 | mg/Nm3 |
| 6 | Entrance flue dust | 100 | mg/Nm3 |
| 7 | Humidity of flue gas | 5.3 | Wt% |
Table 2-3 desulphurization denitration emission behaviours
| Sequence number | Project | Quantity | Unit |
| 1 | Exiting flue gas amount (operating mode) | 820493 | m3/h |
| 2 | Exhaust gas temperature | 58 | ℃ |
| 3 | Sulfur dioxide emissioning concentration | 20 | mg/Nm3 |
| 4 | Discharged nitrous oxides concentration | 46 | mg/Nm3 |
| 5 | Desulfuration efficiency | 98.4 | Wt% |
| 6 | Denitration efficiency | 89.3 | Wt% |
| 7 | Export dust concentration | 12 | mg/Nm3 |
The formula of table 2-4 foaming thermal-insulatings
| Name of material | Desulphurization denitration slurry | Magnesia | Slag | Flyash | Foaming agent | Additive |
| Specification (kg) | 100 | 30 | 20 | 20 | 5 | 5 |
The performance test results of table 2-5 foaming thermal-insulatings
| Compression strength (MPa) | Density (kg/m3) | Thermal conductivity factor (W/mK) | Water absorption rate (%) |
| 6.0 | 550 | 0.125 | 20 |
Embodiment 3
It is same as Example 1 in addition to following formulas or step.
(1) modulation of desulfurization denitrification agent
Each component is well mixed according to formula as below, obtains desulfurization denitrification agent.
Table 3-1 desulfurization denitrification agents composition and dosage
Flue gas desulfurization and denitrification operating mode is referring to table 3 below -2 and table 3-3.Formula and the performance test results ginseng of foaming thermal-insulating
It is shown in Table 3-4 and table 3-5.
Table 3-2 flue gas desulfurization and denitrification duty parameters
| Sequence number | Project | Quantity | Unit |
| 1 | Inlet flue gas amount (operating mode) | 1092076 | m3/h |
| 2 | Standard state exhaust gas volumn | 741361 | Nm3/h |
| 3 | Inlet temperature | 143 | ℃ |
| 4 | Sulfur dioxide entrance concentration | 956 | mg/Nm3 |
| 5 | Nitrogen oxides entrance concentration | 439 | mg/Nm3 |
| 6 | Entrance flue dust | 113 | mg/Nm3 |
| 7 | Humidity of flue gas | 5.8 | Wt% |
Table 3-3 desulphurization denitration emission behaviours
| Sequence number | Project | Quantity | Unit |
| 1 | Exiting flue gas amount (operating mode) | 828453 | m3/h |
| 2 | Exhaust gas temperature | 57 | ℃ |
| 3 | Sulfur dioxide emissioning concentration | 20 | mg/Nm3 |
| 4 | Discharged nitrous oxides concentration | 33 | mg/Nm3 |
| 5 | Desulfuration efficiency | 98.7 | Wt% |
| 6 | Denitration efficiency | 89.6 | Wt% |
| 7 | Export dust concentration | 11 | mg/Nm3 |
The formula of table 3-4 foaming thermal-insulatings
| Name of material | Desulphurization denitration slurry | Magnesia | Slag | Flyash | Foaming agent | Additive |
| Specification (kg) | 100 | 30 | 20 | 10 | 5 | 5 |
The performance test results of table 3-5 foaming thermal-insulatings
| Compression strength (MPa) | Density (kg/m3) | Thermal conductivity factor (W/mK) | Water absorption rate (%) |
| 8.2 | 710 | 0.181 | 25.4 |
From embodiment 1~3, the present invention can be with high-efficiency desulfurization denitration, and the density of the foaming thermal-insulating produced
Less than 750kg/m3, significantly larger than with other foaming products under density, thermal conductivity factor is far below with other under density intensity
Foaming product.
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 the flue gas desulfurization and denitrification production foaming thermal-insulating based on red mud, it is characterised in that including following step Suddenly：(1) pulping stage：It is 10 that the desulfurization denitrification agent being made up of red mud, carbide slag, magnesia and sodium hydroxide is added into pH value ~12 industrial wastewater prepares desulfurization denitrification agent slurries；(2) desulphurization denitration step：Make the desulfurization denitrification agent slurries and ozone and smoke contacts, to form absorption slurries；(3) plasma discharge step：Slurries are discharged when the pH value of the absorption slurries is down to 6.5~7.5 scope, obtain desulphurization denitration material Slurry；(4) forming step：Raw material comprising desulphurization denitration slurry, magnesia, industrial solid wastes, foaming agent and additive is mixed Close, and carry out foaming, obtain foaming body；Wherein, the desulphurization denitration slurry is 100~110 parts by weight, the magnesia For 25~35 parts by weight, the industrial solid wastes are 25~55 parts by weight, and the foaming agent is 2~10 parts by weight, and described Additive is 2~10 parts by weight；(5) curing step：The foaming body conserves under conditions of temperature is 20~60 DEG C and humidity is 50~100% to 3~ 8 hours.
- 2. according to the method for claim 1, it is characterised in that in the red mud comprising 6~50wt% calcium oxide, 2~ 10wt% sodium oxide molybdenas, 5~20wt% aluminum oxide and 5~50wt% iron oxide；The content of calcium hydroxide is in the carbide slag 80wt%~90wt%；And the content of activated magnesia is more than 60% in the magnesia.
- 3. according to the method for claim 1, it is characterised in that the red mud is 30~70 parts by weight, and the carbide slag is 30~70 parts by weight, the magnesia is 1~40 parts by weight, and the sodium hydroxide is 0.1~30 parts by weight.
- 4. according to the method for claim 1, it is characterised in that the weight ratio of the desulfurization denitrification agent and the industrial wastewater For 1:6~10.
- 5. according to the method for claim 1, it is characterised in that the content of the sulfur dioxide in flue gas is 300mg/Nm3With Up to 3000mg/Nm3Hereinafter, the content of nitrogen oxides is 200mg/Nm3With up to 500mg/Nm3Hereinafter, and oxygen content be 10~ 20vol%.
- 6. according to the method for claim 5, it is characterised in that the ozone is 40 DEG C with the temperature during smoke reaction ~70 DEG C, and the concentration of ozone is 1~15wt% when starting to contact with flue gas.
- 7. according to the method for claim 6, it is characterised in that the industrial solid wastes be selected from clinker, slag, slag, Scum, flyash, land plaster, the one or more of dolomite dust and shale powder.
- 8. according to the method for claim 7, it is characterised in that it is 1 that the industrial solid wastes, which are selected from weight ratio,:0.8~ 1.5 slag and the mixture of flyash.
- 9. 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.
- 10. according to the method for claim 9, it is characterised in that the additive be selected from water reducer, early strength agent, retarder, One or more in foam stabilizer, air entraining agent and hydrophober.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711063292.3A CN107602046A (en) | 2017-11-02 | 2017-11-02 | The method of flue gas desulfurization and denitrification production foaming thermal-insulating based on red mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711063292.3A CN107602046A (en) | 2017-11-02 | 2017-11-02 | The method of flue gas desulfurization and denitrification production foaming thermal-insulating based on red mud |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107602046A true CN107602046A (en) | 2018-01-19 |
Family
ID=61085663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711063292.3A Pending CN107602046A (en) | 2017-11-02 | 2017-11-02 | The method of flue gas desulfurization and denitrification production foaming thermal-insulating based on red mud |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107602046A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115745519A (en) * | 2022-11-25 | 2023-03-07 | 东南大学 | Foamed light soil based on expansive soil and industrial solid waste and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055689A (en) * | 2013-01-09 | 2013-04-24 | 浙江大学 | Desulfurization absorption liquid capable of simultaneously stabilizing bivalent mercury |
| CN104857835A (en) * | 2015-06-05 | 2015-08-26 | 北京中晶佳镁环境科技股份有限公司 | Integrated flue gas treatment device and method |
| CN105817134A (en) * | 2015-01-07 | 2016-08-03 | 河北衡兴环保设备工程有限公司 | Chemical process wet-method desulphurization technology |
| CN105859166A (en) * | 2016-03-28 | 2016-08-17 | 北京中晶环境科技股份有限公司 | Modified magnesium oxysulfate cement for foaming and foam material thereof |
| CN106467387A (en) * | 2015-08-19 | 2017-03-01 | 北京中晶环境科技股份有限公司 | A kind of magnesium processes desulfurization produces the device and method of magnesium sulfate foamed bricks |
-
2017
- 2017-11-02 CN CN201711063292.3A patent/CN107602046A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103055689A (en) * | 2013-01-09 | 2013-04-24 | 浙江大学 | Desulfurization absorption liquid capable of simultaneously stabilizing bivalent mercury |
| CN105817134A (en) * | 2015-01-07 | 2016-08-03 | 河北衡兴环保设备工程有限公司 | Chemical process wet-method desulphurization technology |
| CN104857835A (en) * | 2015-06-05 | 2015-08-26 | 北京中晶佳镁环境科技股份有限公司 | Integrated flue gas treatment device and method |
| CN106467387A (en) * | 2015-08-19 | 2017-03-01 | 北京中晶环境科技股份有限公司 | A kind of magnesium processes desulfurization produces the device and method of magnesium sulfate foamed bricks |
| CN105859166A (en) * | 2016-03-28 | 2016-08-17 | 北京中晶环境科技股份有限公司 | Modified magnesium oxysulfate cement for foaming and foam material thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115745519A (en) * | 2022-11-25 | 2023-03-07 | 东南大学 | Foamed light soil based on expansive soil and industrial solid waste and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108373315B (en) | Device and method for producing magnesium sulfate foamed bricks by magnesium desulfurization methods | |
| CN107488021B (en) | The manufacturing method of cementitious material based on ozone oxidation | |
| CN101734875B (en) | Method for catalytic oxidation of calcium sulfite in desulphurization ash by dry method and semi-dry method | |
| CN106467370B (en) | A kind of device and method of magnesium processes desulfurization production cement | |
| CN101607172B (en) | Desulfurizer for desulfurization of smoke and method for preparing same | |
| CN113336514A (en) | Mineralized carbon dioxide brick making process | |
| JPH06198126A (en) | Method for treating exhaust gas | |
| CN107573013A (en) | The method of flue gas desulfurization and denitrification production fibre cement product based on red mud | |
| CN107602046A (en) | The method of flue gas desulfurization and denitrification production foaming thermal-insulating based on red mud | |
| CN107500697A (en) | The manufacture method of fibre cement product based on ozone oxidation | |
| CN108939904B (en) | Desulfurizing agent composition and application thereof in cement clinker production | |
| CN107721452A (en) | The manufacture method of foaming thermal-insulating based on ozone oxidation | |
| CN107628804A (en) | The method of flue gas desulfurization production foaming thermal-insulating based on red mud | |
| CN105036796A (en) | Load-bearing aerated concrete prepared by means of coal gangue and lime nitrogen hydrolysis waste and preparation method thereof | |
| CN107573002A (en) | The production method of foaming thermal-insulating based on carbide slag desulphurization denitration | |
| CN114163158A (en) | Multi-component waste residue coupling and quality-enhancing composite powder and preparation method and application thereof | |
| CN107721365A (en) | The manufacture method of foaming thermal-insulating based on carbide slag desulphurization denitration | |
| CN107628797A (en) | The method that flue gas desulfurization and denitrification manufactures foaming thermal-insulating | |
| CN102010627B (en) | Calcination-free functional desulphurization gypsum putty powder for interior and exterior walls and preparation method thereof | |
| CN107759180A (en) | The method of flue gas desulfurization and denitrification manufacture light concrete product based on red mud | |
| CN107698228A (en) | The production method of foaming thermal-insulating based on carbide slag desulfurization | |
| CN107673719A (en) | The method of flue gas desulfurization and denitrification production light concrete product based on red mud | |
| CN107721341A (en) | Light concrete product and its production method | |
| CN113117490A (en) | Integrated process for flue gas desulfurization and denitrification and cementing material production | |
| CN113117494A (en) | Integrated method for flue gas desulfurization and denitrification and cementing material production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 100176 Ronghua International Building, 10 Ronghua South Road, Beijing Daxing District, Beijing Economic and Technological Development Zone, 20th Floor Applicant after: Zhongjing Blue Industrial Group Co., Ltd. Address before: 100176 Ronghua International Building, 10 Ronghua South Road, Beijing Daxing District, Beijing Economic and Technological Development Zone, 20th Floor Applicant before: MICROTEK blue Industrial Co., Ltd. |
|
| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180119 |
|
| RJ01 | Rejection of invention patent application after publication |