CN103708632A - Grey water antiscale dispersion agent for gasification - Google Patents
Grey water antiscale dispersion agent for gasification Download PDFInfo
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- CN103708632A CN103708632A CN201410013818.7A CN201410013818A CN103708632A CN 103708632 A CN103708632 A CN 103708632A CN 201410013818 A CN201410013818 A CN 201410013818A CN 103708632 A CN103708632 A CN 103708632A
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Abstract
The invention discloses a grey water antiscale dispersion agent for gasification. The antiscale dispersion agent is prepared from 35-50 percent of terpolymer, 10-30 percent of acrylate-hydroxypropyl acrylate, 20-30 percent of hydrolyzed maleic anhydride copolymer, 2-5 percent of phosphate, 5-15 percent of epoxy sodium succinate and a certain proportion of water. According to the antiscale dispersion agent, the static antiscale rate of calcium carbonate at 150 DEG C reaches more than 96 percent, the antiscale rate of calcium carbonate at 250 DEG C reaches more than 85 percent, and the antiscale rate of calcium carbonate at high pressure of 8.0Mpa and 250 DEG C reaches more than 77 percent. When the addition amount of the antiscale dispersion agent in gasification of grey water is 40-80ppm, calcium ions and magnesium ions can be dispersed, the scaling of the grey water is retarded, suspended solids, such as insoluble silicate and coal ash can be effectively dispersed, the problem of scaling of a gray water system in a gasification process is solved, and a device can continuously operate under the rigorous working conditions of long period and high load; water sources are saved and the call to environmental friendliness is responded.
Description
Technical field
The present invention relates to organic chemistry composition, refer in particular to a kind of gasification buck dirt dispersion agent.
Background technology
China is the country of coal more than, few oil, deficency, by 2010, in primary energy source consumption structure, coal accounts for 60% left and right, greatly develop clean coal technology, utilize coal resources in China high-efficiency cleaning, for promoting energy and environment coordinated development, meet national economy fast and stable development need, there is extremely important strategic importance.
Gasification, as the important component part of clean coal technology, has very important status.Up to now, the most representative is to take the Texaco gasification technology that the Shell gasification technology that dry pulverized coal is raw material and the coal water slurry of take be raw material.Gasification installation grey black water circulation system, needs a large amount of recirculated water to use as washing gas liquor.And system is different from general boiler of power plant and Water System of Refinery, gasification installation grey black water system has range of temperature wide (40～250 ℃), and the high temperature residence time is long, 150 ℃ of above about 30min of region residence time; Pressure range wide (0.09～6.5Mpa); PH changes wide (5～9); Grey black aqueous suspension object height; Calcium, magnesium, silicon ion content are high; Change in flow is large, and these factors have caused each position deposition fouling tendency of system different jointly, are difficult to control thin slag deposits and CaCO
3, MgCO
3deposition.And face environmental requirement, a lot of coal chemical industry enterprises blowdown flow rates have been subject to very big restriction, and water system cycles of concentration constantly increases, and the system of water quality environment harshness is made the matter worse more, easier fouling, when fouling is serious, the equipment that affects normally moves.
Summary of the invention
The object of the invention is to be improved for the shortcoming existing in background technology and problem, a kind of high temperature resistant, high pressure resistant, resistance to high rigidity is provided, to adapt to pH a wider range compatibleness good, particularly can the extension device cycle of operation in coal gasification apparatus ash water system, save the repair time, expense, and can meet a kind of gasification buck dirt dispersion agent of the environment protection control index of enterprise's buck blowdown requirement.
The present invention is comprised of the component of following mass percent:
Terpolymer 35 ~ 50%, vinylformic acid-Propylene glycol monoacrylate 10 ~ 30%, hydrolysis copolymer-maleic anhydride 20 ~ 30%, phosphonate 2 ~ 5%, polyepoxy sodium succinate 5 ~ 15%, a certain proportion of water.
Terpolymer of the present invention is vinylformic acid/2-methyl-2-acrylamido-propane sulfonic acid multipolymer, and its solid content is 30%, high temperature resistant, lays particular emphasis on dissemination.
The solid content of vinylformic acid-Propylene glycol monoacrylate multipolymer of the present invention is 30%, high temperature resistant, not only carbonate is had to significant scale effect, and Indian red, clay, mud are had to good dissemination.
Maleic anhydride of the present invention is oil soluble technique hydrolysis maleic anhydride, and its solid content is 48%, high temperature resistant, and decomposition temperature, more than 330 ℃, is still having good scale inhibition dispersion effect to carbonate below 300 ℃, and the scale inhibition time can reach 100h.
Phosphonate of the present invention is hydroxy ethylene diphosphonic acid, and its active ingredient accounts for 50%, high temperature resistant, lays particular emphasis on scale effect.
The solid content of polyepoxy sodium succinate of the present invention is 40%, high temperature resistant, lays particular emphasis on the silicon flowing in buck after scale inhibition scattered pulverized coal or coal slurry burning dirty.
A certain proportion of water of the present invention, its certain proportion is the last concentration that regulates, and makes dirt dispersion agent solid content be controlled at the content of more than 25% water.
The present invention has following advantage and beneficial effect:
1, the present invention is directed to the ash water system in coal gasification apparatus, buck is comparatively special: high temperature, high pressure, high rigidity, pH range are wider, and general medicament is difficult to reach to CaCO in buck
3, MgCO
3and scale inhibition, the dissemination of outstanding thing admittedly such as silicon dirt.The present invention filters out the medicament of Various Functions from scale-inhibiting dispersion agent for water treatment, carries out compatibility, obtains the gasification buck dirt dispersion agent of excellent performance.
2, to have P content low in the present invention, and environmental friendliness, good, the low-consuming feature of dispersing and antisludging effect are applicable to the grey water treatment system of different quality, coal, temperature, pressure.
3, the present invention is in service at device, can make dirt layer thinner outside, dirty matter is also more loose, for the time has been saved in maintenance, expense.
4, the present invention can improve buck cycles of concentration, reduces sewage discharge, saving water resource.
Embodiment
Embodiment 1
Laboratory is from water distribution: preparation is containing Ca
2+the calcium chloride water of 6.0 mg/mL, containing HCO
3 -the sodium bicarbonate water sample of 18.3mg/mL is stand-by.
Dirt dispersion agent: proportioning raw materials:
Vinylformic acid/2-methyl-2-acrylamido-propane sulfonic acid multipolymer (solid content: 30%): 45g;
Vinylformic acid-Propylene glycol monoacrylate multipolymer (solid content: 30%): 25g;
Hydrolysis maleic anhydride (solid content: 48%): 20g;
Hydroxy ethylene diphosphonic acid (active ingredient: 50%): 2.5g;
Polyepoxy sodium succinate (solid content: 40%): 7.5g;
The water yield: 34g
After being uniformly mixed, stand-by.
1, experiment condition: temperature: 80 ℃
Experimental procedure: add the calcium chloride water sample 20ml of experiment autogamy calcium ions in 500ml volumetric flask, making calcium ion content is 120mg, then adds 10ml dirt dispersion agent, more slowly add and contain HCO
3 -sodium bicarbonate water sample 20ml, make HCO
3 -amount be 366mg, be diluted with water to volumetric flask scale, in the test solution finally preparing approximately containing Ca
2+6mmol/L, containing HCO
3 -12mmol/L; Make blank contrast sample simultaneously; The test solution preparing and blank test solution are transferred to respectively in Erlenmeyer flask, put into the water bath with thermostatic control of 80 ℃, constant temperature 10 hours, takes out and filters, and uses respectively the calcium ion in EDTA standardized solution titration water, and the scale inhibition performance that records dirt dispersion agent is 97.6%
2, experiment condition: temperature: 150 ℃
Experimental procedure: add the calcium chloride water sample 40ml of experiment autogamy calcium ions in 1000ml volumetric flask, making calcium ion content is 240mg, then adds 20ml dirt dispersion agent, more slowly add and contain HCO
3 -sodium bicarbonate water sample 40ml, make HCO
3 -amount be 732mg, be diluted with water to volumetric flask scale, in the test solution finally preparing approximately containing Ca
2+6mmol/L, containing HCO
3 -12mmol/L; Make blank contrast sample simultaneously; The test solution preparing and blank test solution are transferred to respectively in 1500ml normal-pressure reaction kettle, and temperature is controlled at 150 ℃, and constant temperature takes out filtration after 2 hours, uses respectively the calcium ion in EDTA standardized solution titration water, and the scale inhibition performance that records dirt dispersion agent is 97.1%.
3, experiment condition: temperature: 250 ℃
Experimental procedure: add the calcium chloride water sample 40ml of experiment autogamy calcium ions in 1000ml volumetric flask, making calcium ion content is 240mg, then adds 20ml dirt dispersion agent, more slowly add and contain HCO
3 -sodium bicarbonate water sample 40ml, make HCO
3 -amount be 732mg, be diluted with water to volumetric flask scale, in the test solution finally preparing approximately containing Ca
2+6mmol/L, containing HCO
3 -12mmol/L; Make blank contrast sample simultaneously; The test solution preparing and blank test solution are transferred to respectively in 1500ml normal-pressure reaction kettle, and temperature is controlled at 250 ℃, and constant temperature 2 hours takes out and filters, and uses respectively the calcium ion in EDTA standardized solution titration water, and the scale inhibition performance that records dirt dispersion agent is 88.0%.
4, experiment condition: temperature: 250 ℃, high pressure 8.0mPa
Experimental procedure: add the calcium chloride water sample 40ml of experiment autogamy calcium ions in 1000ml volumetric flask, making calcium ion content is 240mg, then adds 20ml dirt dispersion agent, more slowly add and contain HCO
3 -sodium bicarbonate water sample 40ml, make HCO
3 -amount be 732mg, be diluted with water to volumetric flask scale, in the test solution finally preparing approximately containing Ca
2+6mmol/L, containing HCO
3 -12mmol/L; Make blank contrast sample simultaneously; The test solution preparing and blank test solution are transferred to respectively in 1500ml autoclave, and temperature is controlled at 250 ℃, and pressure-controlling is at 8.0mPa, constant temperature 2 hours, take out and filter, use respectively the calcium ion in EDTA standardized solution titration water, record the scale inhibition performance 80.1% of dirt dispersion agent.
Embodiment 2
The Inner Mongol easy high Coal Chemical Industry gasification workshop section buck water quality: pH:8.07, specific conductivity: 3.84mS/cm, turbidity: 33.4NTU, total hardness: 583.50 mg/L, Ca
2+475.70 mg/L, total alkalinity: 560.00 mg/L, chlorion 133.875mg/L, total iron 5.30mg/L, total phosphorus: 8.83mg/L.
Dirt dispersion agent: proportioning raw materials:
Vinylformic acid/2-methyl-2-acrylamido-propane sulfonic acid multipolymer (solid content: 30%): 35g; Vinylformic acid-Propylene glycol monoacrylate multipolymer (solid content: 30%): 28g;
Hydrolysis maleic anhydride (solid content: 48%): 25g;
Hydroxy ethylene diphosphonic acid (active ingredient: 50%): 2.5g;
Polyepoxy sodium succinate (solid content: 40%): 9.5g;
The water yield: 38g
After being uniformly mixed, stand-by.
1, experiment condition: temperature: 80 ℃
Experimental procedure is with 1 in embodiment 1, and the scale inhibition performance of dirt dispersion agent of the present invention is 97.5%
2, experiment condition: temperature: 150 ℃
Experimental procedure is with 2 in embodiment 1, and the scale inhibition performance of dirt dispersion agent of the present invention is 96.8%
3, experiment condition: temperature: 250 ℃
Experimental procedure is with 3 in embodiment 1, and the scale inhibition performance of dirt dispersion agent of the present invention is 89.2%
4, experiment condition: temperature: 250 ℃, high pressure 8.0mPa
Experimental procedure is with 4 in embodiment 1, and the scale inhibition performance of dirt dispersion agent of the present invention is 80.3%
Embodiment 3
Firing Shenhua Coal liquefaction packet header Coal Chemical Industry branch office gasification installation low pressure ash water pump buck water quality: pH:7.68, specific conductivity: 4.83mS/cm, turbidity: 67.6NTU, total hardness: 1212.52 mg/L, Ca
2+1123.80 mg/L, total alkalinity: 1205.00 mg/L, chlorion 512.34 mg/L, total iron 4.87mg/L, total phosphorus: 2.39mg/L.
Dirt dispersion agent: proportioning raw materials:
Vinylformic acid/2-methyl-2-acrylamido-propane sulfonic acid multipolymer (solid content: 30%): 35g;
Vinylformic acid-Propylene glycol monoacrylate multipolymer (solid content: 30%): 20g;
Hydrolysis maleic anhydride (solid content: 48%): 30g;
Hydroxy ethylene diphosphonic acid (active ingredient: 50%): 5g;
Polyepoxy sodium succinate (solid content: 40%): 10g;
The water yield: 44 g
After being uniformly mixed, stand-by
1, experiment condition: temperature: 80 ℃ of times: 10 hours
Experimental procedure is with 1 in embodiment 1, and the scale inhibition performance of dirt dispersion agent of the present invention is 97. 1 %
2, experiment condition: temperature: 150 ℃
Experimental procedure is with 2 in embodiment 1, and the scale inhibition performance of dirt dispersion agent of the present invention is 97.5%
3, experiment condition: temperature: 250 ℃
Experimental procedure is with 3 in embodiment 1, and the scale inhibition performance of dirt dispersion agent of the present invention is 88.2%
4, experiment condition: temperature: 250 ℃, high pressure 8.mPa
Experimental procedure is with 4 in embodiment 1, and the scale inhibition performance of dirt dispersion agent of the present invention is 79.6%
Embodiment of the present invention is only the description that the preferred embodiment of the present invention is carried out; not design of the present invention and scope are limited; do not departing under the front topic of design philosophy of the present invention; various modification and improvement that in this area, engineering technical personnel make technical scheme of the present invention; all should fall into protection scope of the present invention; the technology contents that the present invention asks for protection, is all documented in claims.
Claims (7)
1. a gasification buck dirt dispersion agent, is characterized in that it is prepared from by following mass percent component:
Terpolymer 35 ~ 50%, vinylformic acid-Propylene glycol monoacrylate 10 ~ 30%, hydrolysis copolymer-maleic anhydride 20 ~ 30%, phosphonate 2 ~ 5%, polyepoxy sodium succinate 5 ~ 15%, a certain proportion of water.
2. a kind of gasification buck dirt dispersion agent according to claim 1, is characterized in that described terpolymer is vinylformic acid-2-methyl-2-vinylformic acid amido-propane sulfonic acid multipolymer, and its solid content is 30%.
3. a kind of gasification buck dirt dispersion agent according to claim 1, is characterized in that described vinylformic acid-Propylene glycol monoacrylate multipolymer solid content is 30%.
4. a kind of gasification buck dirt dispersion agent according to claim 1, is characterized in that described hydrolysis maleic anhydride is oil soluble technique hydrolysis maleic anhydride, and its solid content is 48%.
5. a kind of gasification buck dirt dispersion agent according to claim 1, is characterized in that described phosphonate is hydroxy ethylene diphosphonic acid, and its active ingredient accounts for 50%.
6. a kind of gasification buck dirt dispersion agent according to claim 1, is characterized in that the solid content of described polyepoxy sodium succinate is 40%.
7. a kind of gasification buck dirt dispersion agent according to claim 1, is characterized in that described a certain proportion of water, and its certain proportion is the last concentration that regulates, and makes solid content be controlled at the content of more than 25% water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410013818.7A CN103708632B (en) | 2014-01-13 | 2014-01-13 | Grey water antiscale dispersion agent for gasification |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410013818.7A CN103708632B (en) | 2014-01-13 | 2014-01-13 | Grey water antiscale dispersion agent for gasification |
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| CN103708632A true CN103708632A (en) | 2014-04-09 |
| CN103708632B CN103708632B (en) | 2015-04-01 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105754670A (en) * | 2016-04-06 | 2016-07-13 | 山东泰和水处理科技股份有限公司 | Coal water slurry dispersion stabilizer |
| CN106830378A (en) * | 2017-02-23 | 2017-06-13 | 山东化友水处理技术有限公司 | A kind of buck scale preventative and its preparation and filler test method |
| US10196509B2 (en) | 2015-05-07 | 2019-02-05 | Baker Hughes, A Ge Company, Llc | Inhibiting fouling tendency in high coal ash-containing water systems |
| CN112079456A (en) * | 2020-09-17 | 2020-12-15 | 四川路加四通科技发展有限公司 | Coal gasification high-temperature grey water scale inhibition and dispersion agent, and preparation method and application thereof |
| CN112578078A (en) * | 2020-11-18 | 2021-03-30 | 北京星枫先控科技有限公司 | Water quality Ca for gasification device2+、Mg2+On-line monitoring method |
| CN112980523A (en) * | 2021-02-22 | 2021-06-18 | 陕西省石油化工研究设计院 | Coal water slurry and additive mixed with methanol-to-olefin wastewater |
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| EP0302651A1 (en) * | 1987-08-03 | 1989-02-08 | Calgon Corporation | Method for controlling calcium carbonate scaling in high PH aqueous systems |
| JP2005270769A (en) * | 2004-03-24 | 2005-10-06 | Kurita Water Ind Ltd | Scale prevention method |
| CN101066811A (en) * | 2007-06-15 | 2007-11-07 | 武汉金坡化工科技有限公司 | No-phosphate corrosion and scale inhibitor and its application |
| CN101746900A (en) * | 2008-12-01 | 2010-06-23 | 中国石油化工股份有限公司 | Scale inhibitor combination, preparation method thereof and sewage treatment method |
| CN103086524A (en) * | 2012-12-07 | 2013-05-08 | 江苏天脉化工有限公司 | High-efficiency grey water dispersing agent |
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Patent Citations (5)
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|---|---|---|---|---|
| EP0302651A1 (en) * | 1987-08-03 | 1989-02-08 | Calgon Corporation | Method for controlling calcium carbonate scaling in high PH aqueous systems |
| JP2005270769A (en) * | 2004-03-24 | 2005-10-06 | Kurita Water Ind Ltd | Scale prevention method |
| CN101066811A (en) * | 2007-06-15 | 2007-11-07 | 武汉金坡化工科技有限公司 | No-phosphate corrosion and scale inhibitor and its application |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10196509B2 (en) | 2015-05-07 | 2019-02-05 | Baker Hughes, A Ge Company, Llc | Inhibiting fouling tendency in high coal ash-containing water systems |
| CN105754670A (en) * | 2016-04-06 | 2016-07-13 | 山东泰和水处理科技股份有限公司 | Coal water slurry dispersion stabilizer |
| CN106830378A (en) * | 2017-02-23 | 2017-06-13 | 山东化友水处理技术有限公司 | A kind of buck scale preventative and its preparation and filler test method |
| CN106830378B (en) * | 2017-02-23 | 2020-11-10 | 山东化友水处理技术有限公司 | Preparation and screening test method of grey water scale inhibitor |
| CN112079456A (en) * | 2020-09-17 | 2020-12-15 | 四川路加四通科技发展有限公司 | Coal gasification high-temperature grey water scale inhibition and dispersion agent, and preparation method and application thereof |
| CN112578078A (en) * | 2020-11-18 | 2021-03-30 | 北京星枫先控科技有限公司 | Water quality Ca for gasification device2+、Mg2+On-line monitoring method |
| CN112980523A (en) * | 2021-02-22 | 2021-06-18 | 陕西省石油化工研究设计院 | Coal water slurry and additive mixed with methanol-to-olefin wastewater |
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Effective date of registration: 20160624 Address after: 414000 Hunan Province Economic and Technological Development Zone Yueyang Xu Road Building 205 room 3 No. 1 2 Patentee after: Hunan Dong Ying energy saving and environmental protection science and Technology Development Co.,Ltd. Address before: 907, room 414000, Century Star building, 1 Yunmeng Road, Yueyang Tower District, Hunan, Yueyang Patentee before: Hunan Dongying Coal Chemical Technology Development Co.,Ltd. |
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