CN104531242A - Method for preparing coal water slurry from methylamine wastewater - Google Patents
Method for preparing coal water slurry from methylamine wastewater Download PDFInfo
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- CN104531242A CN104531242A CN201410751005.8A CN201410751005A CN104531242A CN 104531242 A CN104531242 A CN 104531242A CN 201410751005 A CN201410751005 A CN 201410751005A CN 104531242 A CN104531242 A CN 104531242A
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- methylamine
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Abstract
The invention discloses a method for preparing coal water slurry from methylamine wastewater, which comprises the following steps: regulating the pH value of the methylamine wastewater to 9.0-10.0 to perform deodorization treatment; carrying out activating treatment on a coal water slurry additive; and adding the coal water slurry additive and coal powder into the methylamine wastewater subjected to deodorization treatment, and uniformly mixing to obtain the coal water slurry. The methylamine wastewater is used instead of pure water in the coal water slurry, thereby effectively treating and utilizing the wastewater generated in the chemical industry production process. Compared with the traditional methylamine wastewater treatment process, the method does not need expensive equipment or reagents, and is simple and efficient. Compared with the traditional coal water slurry preparation technology, the method saves abundant water resources, and can further enhance the heat value of the produced coal water slurry.
Description
Technical field
The invention belongs to coal water slurry preparing technical field, be specifically related to a kind of method that methylamine waste water prepares coal water slurry.
Background technology
China has numerous chemical enterprises, and chemical enterprise all will discharge a large amount of trade effluent every day, but needs before discharging, through strict purification filtering operation, could discharge after water quality is up to state standards.But purification filtering needs complicated equipment and high medicament, often makes enterprise bear higher economical load.Along with China's industrialization development, the quantity discharged of trade effluent is increasing, the methylamine waste water especially produced in chemical industry building-up process, and processing cost is very high, and is often difficult to by the conventional process such as biological degradation, physical sedimentation.What require along with Environmental Protection in China improves constantly simultaneously, and the process of this kind of methylamine waste water also becomes the important factor of restriction chemical enterprise steady progression.Therefore, the challenge that this kind of methylamine waste water becomes current rigorous is processed.
Coal water slurry is a kind of low stain, high heating value, band oil coal based fluid fuel by Cemented filling, primarily of coal dust, water and a small amount of dispersion agent composition.It changes the traditional combustion mode of coal, not easily produces flue dust after burning, demonstrates huge environmental protection and energy saving advantage.But coal water slurry water generally uses pure water at present, and water accounting in coal water slurry, up to 30%-40%, causes the huge loss of existing water resources.
Summary of the invention
The object of this invention is to provide a kind of method that methylamine waste water prepares coal water slurry, solve the methylamine waste water that existing chemical enterprise produces and not easily to process and existing coal water slurry technology of preparing need consume a large amount of pure water problem.
The technical solution adopted in the present invention is, a kind of methylamine waste water prepares the method for coal water slurry, specifically implements according to following steps:
Step 1, acidity regulator slowly to be added in methylamine waste water, make methylamine waste water ph be down to 9.0 ~ 10.0, deodorizing process is carried out to methylamine waste water;
Step 2,
Slurries additive agent is carried out activation treatment, is that 3 ~ 5:1000 mixes in mass ratio by activated additive and the methylamine waste water processed through step 1, stirs;
Step 3,
By coal dust and the methylamine waste water processed through step 2 in mass ratio 1 ~ 2:1 mix, and constantly stir 10 ~ 20min, make coal dust fully be suspended in methylamine waste water, obtained coal water slurry.
Feature of the present invention is also,
In step 1, acidity regulator is the hydrochloric acid of mass concentration 10% ~ 20% or the sulfuric acid of mass concentration 10% ~ 20%.
In step 2, the concrete grammar of activation treatment is: be dissolved in distilled water by slurries additive agent, and stirs 20 ~ 30min under 35 ~ 50 DEG C of conditions, and stirring velocity is 300 ~ 500r/min, and obtained concentration is the activating additive of 25% ~ 35%;
Slurries additive agent is poly-naphthalene formaldehyde sulfonate, sodium lignosulfonate, Sodium salts humic acids, sodium polyacrylate, trimerization hydrogen methylamine sodium sulfonate, wherein one or more the mixing of trisodium phosphate.
The viscosity of obtained coal water slurry is 500m Pas ~ 1200m Pas.
The invention has the beneficial effects as follows,
A kind of methylamine waste water prepares the method for coal water slurry, by utilizing the pure water in methylamine waste water replacement coal water slurry, effectively processing and make use of the waste water produced in chemical process, compared to traditional methylamine method of wastewater treatment, do not need high equipment and medicament, treatment process is simply efficient; Compared to traditional coal-water-slurry technology of preparing, saved great lot of water resources, and the coal water slurry produced can improve calorific value further.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
A kind of methylamine waste water of the present invention prepares the method for coal water slurry, specifically implements according to following steps:
Step 1,
Slowly added in methylamine waste water by acidity regulator, make methylamine waste water ph be down to 9.0 ~ 10.0, carry out deodorizing process to methylamine waste water, wherein, acidity regulator is the hydrochloric acid of mass concentration 10% ~ 20% or the sulfuric acid of mass concentration 10% ~ 20%;
Step 2,
Naphthalene formaldehyde sulfonate will be gathered, sodium lignosulfonate, Sodium salts humic acids, sodium polyacrylate, trimerization hydrogen methylamine sodium sulfonate, wherein one or more the mixed dissolution of trisodium phosphate in distilled water, and stirs 20 ~ 30min under 35 ~ 50 DEG C of conditions, and stirring velocity is 300 ~ 500r/min, carry out living and also process, obtained concentration is the activating additive of 25% ~ 35%, is then that 3 ~ 5:1000 mixes in mass ratio by activated additive and the methylamine waste water processed through step 1, stirs.
Step 3,
By coal dust and the methylamine waste water processed through step 2 in mass ratio 1 ~ 2:1 mix, and constantly stir 10 ~ 20min, make coal dust fully be suspended in methylamine waste water, obtained viscosity is the coal water slurry of 500m Pas ~ 1200mPas.
In step 1 of the present invention, carrying out deodorizing process to methylamine waste water, is because methylamine is dissolved in after in water understand the gases such as hydrolysis ammonia, the bad smell gas that release is pungent, disadvantageous effect is caused to the health of field personnel, and aqueous methylamine solution is in comparatively strong basicity, perishable piping facility.And the pH value of methylamine waste water is down to 9.0 ~ 10.0, be through many experiments checking after, when pH value lower than 9.0 time, a large amount of acidity regulator need be consumed, increase production cost, when pH higher than 10.0 time, acidity regulator cannot effectively suppress methylamine to be hydrolyzed, thus cannot deodorizing.And select hydrochloric acid or sulfuric acid as acidity regulator, and be because hydrochloric acid and sulfuric acid wide material sources, with low cost, and there is the ability of excellent suppression methylamine hydrolysis.
In step 2 of the present invention, carrying out activation treatment to additive, is because poly-naphthalene formaldehyde sulfonate, sodium lignosulfonate, Sodium salts humic acids, sodium polyacrylate, trimerization hydrogen methylamine sodium sulfonate, trisodium phosphate all belongs to solid particulate, if directly join in methylamine waste water, above-mentioned additive is not easily fully dissolved in waste water, and not easily in waste water, forms stable dispersed system, causes additive to waste; And after activated process, above-mentioned additive to be fully dissolved in methylamine waste water and to form stable dispersion system, makes original additive usage quantity drop to 0.3 ~ 0.5% from 1 ~ 2%, greatly reduces the usage quantity of additive.
Embodiment 1
By mass concentration be 10% salt slow acid add methylamine waste water, and constantly to stir, stop when methylamine waste water ph is 9.0 adding, carry out deodorizing process; Be dissolved in distilled water by poly-naphthalene formaldehyde sulfonate, and stir 30min under 35 DEG C of conditions, stirring velocity is 300r/min, obtained concentration be 25% activation gather naphthalene formaldehyde sulfonate solution; Activation is gathered naphthalene formaldehyde sulfonate solution with methylamine waste water in mass ratio for 3.0:1000 mixes, stir, simultaneously by coal dust with process after methylamine waste water in mass ratio 1:1 mix, and constantly stir 10min, slurries additive agent is fully dissolved, coal dust is fully suspended in methylamine waste water, obtained viscosity is the coal water slurry of 500m Pas.
Embodiment 2
By mass concentration be 12% salt slow acid add methylamine waste water, and constantly to stir, stop when methylamine waste water ph is 9.1 adding, carry out deodorizing process; Be dissolved in distilled water by sodium lignosulfonate, and stir 28min under 37 DEG C of conditions, stirring velocity is 330r/min, obtained concentration be 27% activation gather naphthalene formaldehyde sulfonate solution; Activation is gathered naphthalene formaldehyde sulfonate solution with methylamine waste water in mass ratio for 3.3:1000 mixes, stir, simultaneously by coal dust with process after methylamine waste water in mass ratio 1.2:1 mix, and constantly stir 12min, slurries additive agent is fully dissolved, coal dust is fully suspended in methylamine waste water, obtained viscosity is the coal water slurry of 600m Pas.
Embodiment 3
By mass concentration be 14% sulfuric acid slowly add methylamine waste water, and constantly to stir, stop when methylamine waste water ph is 9.2 adding, carry out deodorizing process; Be dissolved in distilled water by Sodium salts humic acids, and stir 26min under 40 DEG C of conditions, stirring velocity is 370r/min, and obtained concentration is the activation sodium humate solution of 29%; Sodium humate solution will be activated with methylamine waste water in mass ratio for 3.7:1000 mixes, stir, simultaneously by coal dust with process after methylamine waste water in mass ratio 1.4:1 mix, and constantly stir 14min, slurries additive agent is fully dissolved, coal dust is fully suspended in methylamine waste water, obtained viscosity is the coal water slurry of 700m Pas.
Embodiment 4
By mass concentration be 15% sulfuric acid slowly add methylamine waste water, and constantly to stir, stop when methylamine waste water ph is 9.4 adding, carry out deodorizing process; Be dissolved in distilled water by sodium polyacrylate, and stir 25min under 42 DEG C of conditions, stirring velocity is 400r/min, and obtained concentration is the activated polyacrylic acid sodium solution of 30%; By activated polyacrylic acid sodium solution with methylamine waste water in mass ratio for 4.0:1000 mixes, stir, simultaneously by coal dust with process after methylamine waste water in mass ratio 1.5:1 mix, and constantly stir 15min, slurries additive agent is fully dissolved, coal dust is fully suspended in methylamine waste water, obtained viscosity is the coal water slurry of 800m Pas.
Embodiment 5
By mass concentration be 16% sulfuric acid slowly add methylamine waste water, and constantly to stir, stop when methylamine waste water ph is 9.6 adding, carry out deodorizing process; Be dissolved in distilled water by trimerization hydrogen methylamine sodium sulfonate, and stir 24min under 45 DEG C of conditions, stirring velocity is 430r/min, and obtained concentration is the activation trimerization hydrogen methylamine sodium sulfonate solution of 31%; Trimerization hydrogen methylamine sodium sulfonate solution will be activated with methylamine waste water in mass ratio for 4.3:1000 mixes, stir, simultaneously by coal dust with process after methylamine waste water in mass ratio 1.6:1 mix, and constantly stir 16min, slurries additive agent is fully dissolved, coal dust is fully suspended in methylamine waste water, obtained viscosity is the coal water slurry of 900m Pas.
Embodiment 6
By mass concentration be 18% salt slow acid add methylamine waste water, and constantly to stir, stop when methylamine waste water ph is 9.8 adding, carry out deodorizing process; Be dissolved in distilled water by trisodium phosphate, and stir 22min under 48 DEG C of conditions, stirring velocity is 470r/min, and obtained concentration is the activation sodium pyrophosphate solution of 33%; Sodium pyrophosphate solution will be activated with methylamine waste water in mass ratio for 4.7:1000 mixes, stir, simultaneously by coal dust with process after methylamine waste water in mass ratio 1.8:1 mix, and constantly stir 18min, slurries additive agent is fully dissolved, coal dust is fully suspended in methylamine waste water, obtained viscosity is the coal water slurry of 1000m Pas.
Embodiment 7
By mass concentration be 20% salt slow acid add methylamine waste water, and constantly to stir, stop when methylamine waste water ph is 10 adding, carry out deodorizing process; Sodium lignosulfonate and Sodium salts humic acids are dissolved in distilled water, and stir 20min under 50 DEG C of conditions, stirring velocity is 500r/min, and obtained concentration is activation sodium lignosulfonate and the Sodium salts humic acids mixing solutions of 35%; Sodium lignosulfonate and Sodium salts humic acids mixing solutions will be activated with methylamine waste water in mass ratio for 5.0:1000 mixes, stir, simultaneously by coal dust with process after methylamine waste water in mass ratio 2:1 mix, and constantly stir 20min, slurries additive agent is fully dissolved, coal dust is fully suspended in methylamine waste water, obtained viscosity is the coal water slurry of 1200m Pas.
Claims (4)
1. prepare a method for coal water slurry with methylamine waste water, it is characterized in that, specifically implement according to following steps:
Step 1,
Acidity regulator is slowly added in methylamine waste water, makes methylamine waste water ph be down to 9.0 ~ 10.0, deodorizing process is carried out to methylamine waste water;
Step 2,
Slurries additive agent is carried out activation treatment, is that 3 ~ 5:1000 mixes in mass ratio by activated additive and the methylamine waste water processed through step 1, stirs;
Step 3,
By coal dust and the methylamine waste water processed through step 2 in mass ratio 1 ~ 2:1 mix, and constantly stir 10 ~ 20min, make coal dust fully be suspended in methylamine waste water, obtained coal water slurry.
2. a kind of methylamine waste water according to claim 1 prepares the method for coal water slurry, it is characterized in that, in described step 1, acidity regulator is the hydrochloric acid of mass concentration 10% ~ 20% or the sulfuric acid of mass concentration 00% ~ 20%.
3. a kind of methylamine waste water according to claim 1 and 2 prepares the method for coal water slurry, it is characterized in that, in described step 2, the concrete grammar of activation treatment is: be dissolved in by slurries additive agent in distilled water, and 20 ~ 30min is stirred under 35 ~ 50 DEG C of conditions, stirring velocity is 300 ~ 500r/min, and obtained concentration is the activating additive of 25% ~ 35%; Described slurries additive agent is poly-naphthalene formaldehyde sulfonate, sodium lignosulfonate, Sodium salts humic acids, sodium polyacrylate, trimerization hydrogen methylamine sodium sulfonate, wherein one or more the mixing of trisodium phosphate.
4. a kind of methylamine waste water according to claim 1 prepares the method for coal water slurry, it is characterized in that, the viscosity of obtained coal water slurry is 500m Pas ~ 1200m Pas.
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| CN201410751005.8A CN104531242B (en) | 2014-12-08 | 2014-12-08 | A kind of method of preparing water-coal-slurry with methylamine waste water |
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| CN201410751005.8A CN104531242B (en) | 2014-12-08 | 2014-12-08 | A kind of method of preparing water-coal-slurry with methylamine waste water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105368495A (en) * | 2015-11-25 | 2016-03-02 | 陕西省煤化工工程技术研究中心 | Method for preparing synthesis gas from organic dissolvant and biomass residue |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102005028665A1 (en) * | 2005-06-15 | 2007-01-04 | Ami-Agrolinz Melamine International Gmbh | Process for the purification of wastewater from melamine plants |
| CN100564271C (en) * | 2008-01-18 | 2009-12-02 | 浙江丰登化工股份有限公司 | The method for treating ammonia-nitrogen wastewater that produces in a kind of amikacin production process |
| CN101982207B (en) * | 2010-10-13 | 2012-10-03 | 安徽淮化股份有限公司 | Method for treating wastes generated in the synthetic processes of methylamine and dimethyl formamide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105368495A (en) * | 2015-11-25 | 2016-03-02 | 陕西省煤化工工程技术研究中心 | Method for preparing synthesis gas from organic dissolvant and biomass residue |
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