CN107573002A - The production method of foaming thermal-insulating based on carbide slag desulphurization denitration - Google Patents
The production method of foaming thermal-insulating based on carbide slag desulphurization denitration Download PDFInfo
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Abstract
The invention discloses a kind of production method of the foaming thermal-insulating based on carbide slag desulphurization denitration.The desulfurizing agent being made up of carbide slag and magnesia addition alkaline industrial waste water is prepared into desulfurizer slurry；Make desulfurizer slurry and ozone and smoke contacts；Slurries are discharged when the pH value for absorbing slurries reaches 5.3~6.8, obtain desulphurization denitration slurries；Desulphurization denitration slurries are mixed with the raw material comprising industrial solid wastes, foaming agent, adjustable solidification agent and additive；Then conserved 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 manufacture method of foaming thermal-insulating, and in particular to one kind is based on mixed base desulfurization denitrification agent
The method of the production foaming thermal-insulating such as desulphurization denitration slurries and other wastes for being formed with ozone.
Background technology
Nearly 20 years, building heat preservation light weight board obtained the development of great-leap-forward, and heat preservation plate material is in kind, quality, quantity, property
Energy and application etc. all obtain significant progress.Cement board is the strong representative of cement class sheet material, main to use
The materials such as Portland cement, glass bead, flyash, foaming agent, polypropylene fibre, agitated, foaming, shaping, maintenance
Producing foamed cement plane materiel.
CN104261864A discloses a kind of cement insulation board, consists of the following composition by weight：3.5 parts poly-
Acrylic acid, 8.9 parts of magnesium chloride solutions, 1.2 parts of acrylate, 4.5 parts of hydrogen peroxide, 1.2 parts of sodium metasilicate, 6.7 parts of land plasters, 1.2
Part calcium chloride, 8.9 parts of magnesia, 3.4 parts of Calcium Disodium Versenates, 4.5 parts of triethanolamines, 80 parts of 625# cement, 25 parts of powder
Coal ash.The cement insulation board of this method production has fire prevention, waterproof thermal-insulated performance, and environmental protection and energy saving, heat-insulating sound-insulating and matter
Light resistance to compression.
CN102964097A disclose using Portland cement (40%~45%), fine-ground fly-ash (14%~
21%), bentonite (1%~4%), foaming agent (3.5%~4.8%), hydrophober (0.8%~1.5%), early strength agent (0.2%
~0.8%), polypropylene fibre (0.3%~0.9%), water etc. prepare cement insulation board scheme, have energy-conserving and environment-protective,
The advantage such as high insulating effect, fire prevention is non-ignitable, ageing resistace is good, easy construction, cost performance height.
CN 102863194A, which are disclosed, utilizes gel rubber material (120~180 parts), flyash (50~80 parts), fiber reinforcement
(1~5 part) material (0.5~1 part), foaming stable dispersant preparation cement insulation board, wherein the gel rubber material used is
Sulphur aluminic acid cement or 525 Portland cements.
In summary, it is using the production and processing of existing cement progress insulation material, due to cement in the prior art
Belong to highly energy-consuming building materials, substantial amounts of environmental contaminants can be produced in process of production, and it is serious to consume energy.Meanwhile market is existing
Cement foaming insulation board, bad when good during quality because technical merit is uneven, easily collapse mould, Air Bubble Size when mainly producing
The problem of uneven, skewness, defect rate is high, thermal conductivity factor height be present, and intensity is looked into, and sound insulation value is poor, and rapid wear is frangible.
The content of the invention
It is an object of the invention to provide a kind of production method of the foaming thermal-insulating based on carbide slag desulphurization denitration.One
Aspect, the combination of the invention by technologies such as carbide slag, magnesia FGD and oxidizing and denitrating ozones are same in flue gas desulfurization course
Step removing nitrogen oxides, has cooperative effect.This method have desulphurization denitration dosage is small, cost is low, denitrification efficiency is high, fortune
The characteristics of row is stable.On the other hand, the present invention using desulphurization denitration slurries and combines waste water, solid waste production foamed heat insulating
Material, there is higher economic value, and further realize the recycling of waste resource, reduce environmental pollution, mitigate enterprise's fortune
Row burden.Specifically, the present invention includes herein below.
A kind of production method of the foaming thermal-insulating based on carbide slag desulphurization denitration, it comprises the following steps：
(1) pulping stage：The desulfurizing agent being made up of 50~80 parts by weight carbide slags and 20~50 parts by weight magnesia is added
Enter the industrial wastewater that pH value is 7~12 and prepare desulfurizer slurry；
(2) desulphurization denitration step：It is 1000mg/Nm by the desulfurizer slurry, ozone and content of sulfur dioxide3Below,
Amount of nitrogen oxides is 500mg/Nm3Below and oxygen content is 10~20vol% smoke contacts, so as to form absorption slurries；
Wherein, the ozone reacts with the flue gas at 40~70 DEG C；
(3) plasma discharge step：Slurries are discharged when the pH value for absorbing slurries reaches 5.3~6.8, obtain desulphurization denitration slurries；
(4) blend step：By desulphurization denitration slurries and include 60~100 parts by weight industrial solid wastes, 1~8 parts by weight
The raw material mixing of foaming agent, 1~5 parts by weight adjustable solidification agent and 1~10 parts by weight additive；
(5) curing step：The compound 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 the weight ratio of the desulfurizing agent and the industrial wastewater is 1:5~
10。
According to method of the present invention, it is preferable that the content of calcium hydroxide is more than 80wt% in the carbide slag, and
The content of activated magnesia is more than 50% in magnesia.
According to method of the present invention, it is preferable that the magnesia be selected from magnesite light burnt powder, dolomite light burnt powder and
At least one of pure zirconia magnesium is analyzed, and the content of magnesia is divided in the magnesite light burnt powder and the dolomite light burnt powder
Wei not 65wt%~85wt%.
According to method of the present invention, it is preferable that the content of the sulfur dioxide in flue gas is 300mg/Nm3More than,
And the content of nitrogen oxides is 300mg/Nm3More than.
According to method of the present invention, it is preferable that the concentration for starting ozone during reaction is 1~15wt%.
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 and
One or more in useless ash.
According to method of the present invention, it is preferable that the foaming agent in calcium carbide, ammonium carbonate and hydrogen peroxide one
Kind is a variety of.
According to method of the present invention, it is preferable that the adjustable solidification agent is in desulfurated plaster, ardealite and the natural gypsum
One or more.
According to method of the present invention, it is preferable that the additive is vinal.
The present invention solves traditional foaming insulation board life using industrial wastewater, solid waste production foaming thermal-insulating
During production using cement as primary raw material and caused by high energy consumption, the wasting of resources the problem of, make industrial residue, grey the like waste all
Obtain cycling and reutilization.The present invention had both saved foaming thermal-insulating investment, greatly reduced desulphurization denitration operating cost again.Separately
Outside, substantial amounts of industrial residue can be added by foaming thermal-insulating produced by the invention, and main composition magnesium sulfate is
It is prepared by the waste liquid after desulfurization, belongs to desulfuration byproduct, it is cheap, significantly reduce the cost of production.
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.
" foaming thermal-insulating " of the present invention refers to the foam hole that closing is formed in inside concrete, makes concrete light
The material of matter and thermal insulation separation thermalization.The thermal conductivity factor of the foaming thermal-insulating of the present invention is usually 0.10~0.28W/ (m
K), preferably 0.10~0.25W/ (mK), thermal resistance are about 10~20 times of normal concrete.The foaming thermal-insulating of the present invention
Dry volume density is usually 300~1000kg/m3, preferably 400~900kg/m3, equivalent to the 1/5~1/ of portland cement concrete
8 or so, building Integral Loading can be mitigated.The compression strength of the foaming thermal-insulating of the present invention is usually 1.0~10.0MPa,
It is preferred that 1.1~5.0MPa.The water imbibition of the foaming thermal-insulating of the present invention is smaller, usually less than 10%, preferably less than 9%,
Relatively independent closed air bubbles and good globality, make it have certain water resistance.
The present invention is that the production method of foaming thermal-insulating is carried out using the flue gas of low sulfur content.Under normal circumstances, low-sulfur
The flue gas of content can not obtain the foaming thermal-insulating with superperformance.The present invention by creativeness optimize technique so as to
High-efficiency desulfurization denitration is realized, while produces qualified foaming thermal-insulating.Specifically, foaming thermal-insulating of the invention
Manufacture method includes pulping stage, desulphurization denitration step, plasma discharge step, blend step and curing step.It is situated between in detail below
Continue.
Pulping stage：
The present invention is the method for wet-treating flue gas.Slurries for wet-treating are prepared as pulping stage.Specifically,
The desulfurizing agent being made up of carbide slag and magnesia addition industrial wastewater is prepared into desulfurizer slurry.The usage amount of carbide slag be 50~
80 parts by weight, the usage amount of magnesia is 20~50 parts by weight, and the pH value of industrial wastewater is preferably 7~12, more preferably 7~10.
The weight of desulfurizing agent and industrial wastewater ratio is usually 1:5~10, preferably 1:9.The main component of the desulfurizer slurry is hydrogen-oxygen
Change magnesium, calcium hydroxide.
The carbide slag of the present invention is by calcium carbide main component CaC2Reacted with water caused.Carbide slag slurry it is main
Composition is Ca (OH)2, its alkalescence is stronger, and pH value is typically in the range of 10~12.Preferably, in carbide slag calcium hydroxide content
For more than 80wt%.
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 65wt%~85wt% in preferable magnesite light burnt powder and the dolomite light burnt powder.It is preferred that
Ground, at least 50wt% activated magnesia, more preferably at least 60wt% activated magnesia are included in magnesia.
Carbide slag and magnesia are preferably powdered granule thing in the present invention.It is highly preferred that the granularity of carbide slag and magnesia
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 ozone, desulfurization
Agent etc. and the contact area of flue gas.Be advantageous to improve simultaneously to sulfur dioxide in flue gas (SO2) and nitrogen oxides (NOX) absorption
Function, further improve the efficiency of desulphurization denitration.
Desulphurization denitration step：
It by the desulfurizer slurry, ozone and content of sulfur dioxide is 1000mg/Nm that the desulphurization denitration step of the present invention, which is,3
Below, amount of nitrogen oxides 500mg/Nm3Below and oxygen content is 10~20vol% smoke contacts, is absorbed so as to be formed
Slurries；Wherein, the ozone reacts with the flue gas at 40~70 DEG C.When the flue gas contacts with desulfurizer slurry, take off
The sulfur dioxide in magnesium hydroxide, calcium hydroxide and flue gas in sulphur agent slurries reacts to form sulphite, sulfate.According to this
Invention, when starting contact, the content of sulfur dioxide in flue gas is 1000mg/Nm3Hereinafter, such as 900mg/Nm3Below.It is another
Aspect, the content of sulfur dioxide is preferably 300mg/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, influence the performance of the foaming thermal-insulating of production.On it should be noted that
The scope for stating content of sulfur dioxide refers to content when flue gas contacts with desulfurizer slurry first, above-mentioned with the carry out of reaction
Content can be reduced further.
In accordance with the present production process, the content of oxygen is 10~20vol% in flue gas when contacting.In the range of this
Oxygen content is advantageous to sulphite and is further oxidized to sulfate.Oxygen content is too low, the desulfurization slurry sulfite salt mistake produced
Height, the performance for being unfavorable for foaming thermal-insulating improve.In certain embodiments, in order to improve the content of oxygen in flue gas, can adopt
With oxygenation means.For example, the air blast into flue gas.Air blast can use any means known in the art.On it should be noted that
The scope for stating oxygen content refers to content when flue gas contacts with desulfurizer slurry first, with the above-mentioned content meeting of the carry out of reaction
Further reduce.
The content of nitrogen oxides in effluent is 500mg/Nm3Below.The scope of above-mentioned amount of nitrogen oxides refers to work as flue gas
First with content during ozone contact, can further be reduced with the above-mentioned content of carry out of reaction.Preferably, ozone and flue gas
Reaction temperature is 40~70 DEG C.Be advantageous to ozone and NO in this temperature rangeXReaction, so as to be advantageous to improve denitration effect
Rate.Preferably, when first with smoke contacts, the concentration of ozone is in 1~15wt%, preferably in the range of 5~10wt%.From economy
From the aspect of property and denitration efficiency, more preferably ozone concentration is 10wt%.Ozone concentration herein refers to be produced by ozone generator
The concentration of raw ozone, the concentration of ozone in the mixture formed after not ozone mixes with flue gas.Nitrogen oxygen in above range
Compound content is advantageous to keep the nitrate of suitable amount in product, and the nitrate of this suitable amount has shield muscle ability, it is possible to increase
Materials ' durability.
Dust content can be controlled in 30~50mg/Nm in the flue gas of the present invention3Scope.Dust content in the range of this has
Reaction beneficial to ozone and NOx is carried out.Dust content is too high, and denitration efficiency reduces, and possible cause is the dust of too high amount
Part ozone may have been adsorbed.
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 desulphurization denitration step are absorption slurries.With the progress of desulphurization denitration, slurry is absorbed
The pH of liquid is reduced.Slurries are discharged when the pH value drop for absorbing slurries reaches 5.3~6.8, preferably 5.5~6.0, obtain desulphurization denitration
Slurries.The content of pH value control magnesium sulfate in the scope, one side absorption slurry is higher, be advantageous to the performance of resulting product
Improve.On the other hand the desulfurizer slurry more renewed by plasma discharge is advantageous to keep high desulfuration efficiency.Control sulphur in compound
The concentration of sour magnesium is 10~20wt%.Magnesium sulfate concentration within this range, be advantageous to the intensity of the foaming thermal-insulating of production
Improve.
Blend step：
The present invention blend step include by desulphurization denitration slurries with comprising 60~100 parts by weight industrial solid wastes, 1~
The raw material mixing of 8 parts by weight of blowing agent, 1~5 parts by weight adjustable solidification agent and 1~10 parts by weight additive.The use of desulphurization denitration slurries
It can be 150~500 parts by weight to measure, such as 250~350 parts by weight.
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.It is excellent
Selection of land, industrial solid wastes of the invention may be selected from clinker and/or slag.In certain embodiments, useless ash choosing of the invention
One or more from flyash, land plaster, dolomite dust and shale powder, preferably 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.
The foaming agent of the present invention is the material for making object pore-forming.The example includes but is not limited to calcium carbide, ammonium carbonate and double
One or more in oxygen water (hydrogen peroxide).Preferably hydrogen peroxide.The dosage of foaming agent is usually 1~8 parts by weight.Preferably
2~6 parts by weight.
One kind or more that the example of the adjustable solidification agent of the present invention includes but is not limited in desulfurated plaster, ardealite and the natural gypsum
Kind.The dosage of adjustable solidification agent is usually 1~5 parts by weight, preferably 2~4 parts by weight.
The additive of the present invention can be vinal.Its dosage is usually 1~10 parts by weight, preferably 3~10
Parts by weight.
The blend step of the present invention can use any mixed media or mode known in the art, as long as both can be incited somebody to action
It is well mixed or reaches as the mixability needed for foaming thermal-insulating.The mixing apparatus of the present invention can mix for single shaft
Conjunction machine, double-shaft mixer or mixer.Preferably, mixing apparatus of the invention is mixer.
The present invention blend step be preferably：Industrial solid wastes, additive are first mixed with desulphurization denitration slurries, then
Add foaming agent.In an exemplary embodiment, stir speed (S.S.) not preferably less than 600r/min, and 1200r/ should not be higher than during mixing
Min, slurry mixing time need to be 4~10s, preferably 5~8s after adding foaming agent.
Curing step：
It is 20~60 DEG C, preferably 30~50 DEG C in temperature that the curing step of the present invention, which is included the compound, and wet
Spend for 50~100%, be preferably conserve 3~10 hours, preferably 3~8 hours under conditions of 60~80%.
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.
Present invention additionally comprises other steps, for example, demoulding step and cutting step.Demoulding step is protected including cement to be foamed
Adiabator completes maintenance flow, can be stripped when possessing early strength.Cutting step is the foam cement that will be provided with some strength
It can be cut after the demoulding of insulation material blank, cut form adjusts cutting blade progress as needed.
It should be noted that the one or more in sintering machine, pelletizing and kiln are may be from according to the flue gas of the present invention.Only
Sulfur dioxide in flue gas content, oxygen content and nitrogen oxides are wanted in above-mentioned prescribed limit, then the not specific source for limiting flue gas.
The foaming thermal-insulating that the combination of the flue gas of the present invention and specified raw material and specific amount ranges obtains production meets required
Performance requirement.
It should also be noted that, the desulphurization denitration step of the present invention includes desulfurized step and denitrification step, the two can distinguish
Carry out, can also carry out simultaneously.From efficient angle is put forward, preferably carry out simultaneously.Because NO is the main of NOx in flue gas
Composition, it is insoluble in water.It is oxidized when ozone and NO react as NO2Or N2O5Etc. the nitrogen oxides of high-valence state, these high prices
The nitrogen oxides of state is easily absorbed by water or alkaline matter, so as to promote denitrification process.In addition, above-mentioned oxidizing process also generates oxygen
Gas, it is sulfate that it, which further promotes sulfite oxidation,.Therefore, work is cooperateed with the combination of ozone based on the desulfurizing agent of carbide slag
With promoting the progress of desulphurization denitration.
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
(1) magnesia powder and carbide slag powder are added into waste water (pH is 10 or so) and is mixed and made into desulfurizer slurry, delivered to
In the recycle slurry liquid pool of desulfurization tower bottom.Wherein, the component and part of desulfurizing agent is：
The parts by weight of carbide slag 63；The parts by weight of MgO 37.
(2) ozone is made by ozone generator, and spraying pipeline through ozone booster fan, ozone enters desulphurization denitration tower, cigarette
Nitrogen oxides (especially NO) and ozone contact in gas, it is oxidized.Moisture in oxidized nitrogen oxides and desulfurizing agent connects
Touch and fallen into by absorption in lower slurry circulatory pool.Ozone sprays pipeline and is arranged in tower in 65 DEG C of temperature sections.Desulphurization denitration operating mode
Parameter is shown in Table 1.
The desulphurization denitration duty parameter of table 1
| Sequence number | Parameter | Unit | Numerical value |
| 1 | Inlet flue gas amount (operating mode) | m3/h | 1000000 |
| 2 | Inlet flue gas amount (mark condition) | Nm3/h | 685929 |
| 3 | Inlet flue gas temperature | ℃ | 125 |
| 4 | Sulfur dioxide entrance concentration | mg/Nm3 | 1000 |
| 5 | Nitrogen oxides entrance concentration | mg/Nm3 | 400 |
| 6 | Entrance flue dust | mg/Nm3 | 80 |
| 7 | Humidity of flue gas | Wt% | 4.2 |
(3) slurries in recycle slurry liquid pool are expelled to instead by excavationg pump when the pH value of recycle slurry liquid pool reaches 6.0
Answer groove.
(4) following raw material is added in mixing channel to mix with desulphurization denitration slurries, forms foaming thermal-insulating slurry.
The parts by weight of each raw material are as follows：300 parts of desulphurization denitration slurries, flyash (main component 50wt%SiO2, 25wt%
Al2O3, 9wt%CaO) 62 parts, it is 3 parts of foaming agent (hydrogen peroxide, technical grade, concentration 27.5%), 4 parts of adjustable solidification agent (desulfurated plaster), poly-
6 parts of alcohol fibers.High-speed stirred 5s.
(5) the insulation material slurry of formation is poured into the mold and foamed, it is to be foamed completely after at 60 DEG C, humidity 50%
In the environment of conserve 8 hours, finally complete the demoulding, cutting and packaging.
The desulfurization off sulfide effect of embodiment 1 is shown in Table 2, and the testing result of the performance of the foaming thermal-insulating of embodiment 1 is shown in Table
3。
Embodiment 2
In addition to using formula as below or step, foaming thermal-insulating is produced in the same manner as in Example 1.
The component and part of desulfurizing agent is：70 parts of carbide slag, 30 parts of MgO.
The parts by weight of each raw material in blend step are as follows：300 parts of desulphurization denitration slurries, 82 parts of flyash, foaming agent 5
Part, 2 parts of adjustable solidification agent, 6 parts of vinal.High-speed stirred 8s.
The desulfurization off sulfide effect of embodiment 2 is shown in Table 2, and the performance test results of the foaming thermal-insulating of embodiment 2 are shown in Table 3.
Embodiment 3
In addition to using formula as below or step, foaming thermal-insulating is produced in the same manner as in Example 1.
The component and part of desulfurizing agent is：80 parts of carbide slag, 20 parts of MgO.
The parts by weight of each raw material in blend step are as follows：250 parts of desulphurization denitration slurries, 90 parts of flyash, foaming agent 6
Part, 2 parts of adjustable solidification agent, 10 parts of vinal.High-speed stirred 5s.
The desulfurization off sulfide effect of embodiment 3 is shown in Table 2, and the performance test results of the foaming thermal-insulating of embodiment 3 are shown in Table 3.
The flue gas desulfurization and denitrification effect statistical form of 2 each embodiment of table
| Gas Parameters | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Exiting flue gas amount (operating mode) (Nm3/h) | 802237 | 827751 | 818897 |
| Exhaust gas temperature (DEG C) | 55 | 60 | 63 |
| SO2Concentration of emission (mg/Nm3) | 20 | 15 | 16 |
| Desulfuration efficiency (%) | 98.1 | 98.5 | 98.4 |
| NOXConcentration of emission (mg/Nm3) | 18 | 14 | 15 |
| Denitration efficiency (%) | 95.6 | 96.5 | 96.4 |
| Export dust concentration (mg/Nm3) | 12 | 8 | 15 |
| Efficiency of dust collection (%) | 85.4 | 90.1 | 81.8 |
| The quantum of output (t/h) of accessory substance | 4.1 | 4.5 | 4.8 |
The performance test results of each embodiment foaming insulation board of table 3
As shown in tables 2 and 3, method desulfuration efficiency of the invention is up to more than 98%, and denitration efficiency is up to more than 95%.This hair
It is bright to realize high-efficiency desulfurization and denitration, while the foaming thermal-insulating produced meets the regulation of national standard.
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)
1. a kind of production method of the foaming thermal-insulating based on carbide slag desulphurization denitration, it is characterised in that comprise the following steps：
(1) pulping stage：The desulfurizing agent being made up of 50~80 parts by weight carbide slags and 20~50 parts by weight magnesia is added into pH
It is worth and prepares desulfurizer slurry for 7~12 industrial wastewater；
(2) desulphurization denitration step：It is 1000mg/Nm by the desulfurizer slurry, ozone and content of sulfur dioxide3Below, nitrogen oxidation
Thing content is 500mg/Nm3Below and oxygen content is 10~20vol% smoke contacts, so as to form absorption slurries；Wherein, institute
Ozone is stated to react at 40~70 DEG C with the flue gas；
(3) plasma discharge step：Slurries are discharged when the pH value for absorbing slurries reaches 5.3~6.8, obtain desulphurization denitration slurries；
(4) blend step：By desulphurization denitration slurries with being foamed comprising 60~100 parts by weight industrial solid wastes, 1~8 parts by weight
The raw material mixing of agent, 1~5 parts by weight adjustable solidification agent and 1~10 parts by weight additive；
(5) curing step：The compound 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 the weight ratio of the desulfurizing agent and the industrial wastewater is 1:
5~10.
3. according to the method for claim 2, it is characterised in that in the carbide slag content of calcium hydroxide be 80wt% with
On, and the content of activated magnesia is more than 50% in magnesia.
4. according to the method for claim 3, it is characterised in that it is light that the magnesia is selected from magnesite light burnt powder, dolomite
Burn at least one of powder and analysis pure zirconia magnesium, and magnesia in the magnesite light burnt powder and the dolomite light burnt powder
Content is respectively 65wt%~85wt%.
5. according to the method for claim 4, it is characterised in that the content of the sulfur dioxide in flue gas is 300mg/Nm3With
On, and the content of nitrogen oxides is 200mg/Nm3More than.
6. according to the method for claim 5, it is characterised in that when starting reaction, the concentration of the ozone for 1~
15wt%.
7. according to the method for claim 6, it is characterised in that the industrial solid wastes be selected from clinker, slag, slag,
One or more in scum and useless ash.
8. according to the method for claim 7, it is characterised in that the foaming agent is selected from calcium carbide, ammonium carbonate and hydrogen peroxide
In one or more.
9. according to the method for claim 8, it is characterised in that the adjustable solidification agent is selected from desulfurated plaster, ardealite and natural
One or more in gypsum.
10. according to the method for claim 9, it is characterised in that the additive is vinal.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109650835A (en) * | 2018-12-26 | 2019-04-19 | 国电新能源技术研究院有限公司 | A kind for the treatment of method for high-salinity wastewater |
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| 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 |
| 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 |
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| 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 |
| 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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109650835A (en) * | 2018-12-26 | 2019-04-19 | 国电新能源技术研究院有限公司 | A kind for the treatment of method for high-salinity wastewater |
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Application publication date: 20180112 |