CN1274614C - Technology for recovering ash water of coal-fired power plant and system of sealing circulating for recovering thereof - Google Patents
Technology for recovering ash water of coal-fired power plant and system of sealing circulating for recovering thereof Download PDFInfo
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- CN1274614C CN1274614C CN200410065135.2A CN200410065135A CN1274614C CN 1274614 C CN1274614 C CN 1274614C CN 200410065135 A CN200410065135 A CN 200410065135A CN 1274614 C CN1274614 C CN 1274614C
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- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims description 14
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Abstract
The present invention discloses technology for recovering ash water of a coal-fired power plant and a recovering and using closed circulation system thereof. The technology solves the problem of scale formation of an ash conveying pipe line and a water returning pipe line in the prior art. The recovering rate of the ash water of the present invention reaches more than 90% according to the calculation of a cement-water ratio with 1 to 20, and the water returning and scale blocking rate can reach to 94.1%; meanwhile, the present invention has the advantages of less adding amount of a precipitating agent and a scale blocking dispersal agent, low cost, small alternation for an original system by the technology, and strong operability. The steps of the technology for recovering ash water of a coal-fired power plant of the present invention mainly comprises washing, precipitation and ash water separation, wherein the returning water after the ash water is separated is preprocessed, and that is to say, the returning water after the ash water is separated is added with the scale blocking dispersal agent to be preprocessed before washed, and then the returning water is cleaned and removed with dust under the action of the scale blocking dispersal agent; the washed ash water is added with the precipitating agent to be sunk in a complexing way, and then the ash water is separated to form wash water recycling and using closed circulation technology.
Description
Technical field
The present invention relates to a kind of reuse technology and the recycle system thereof of water, more specifically to a kind of ash water of coal-fired power plant reuse technology and reuse closed cycle system thereof.
Background technology
As the water rich and influential family, thermal power plant is first department, accounts for about 1/4 of process water, so the water conservation of power industry just seems important unusually.And what account for waste water total amount about 90% mainly is ash disposal slagging-off draining.The promptly wet ash discharge of hydraulic(-ash) sluicing is the main ash disposal mode that domestic and international coal-burning power plant adopts, and ash disposal system comprises towards grey former water system and Ash Removal System.
The subject matter that hydraulic(-ash) sluicing exists is that the inwall of pipeline in operational process forms hard black dirt easily, As time goes on, and dirt layer progressive additive, cause grey water pipe circulation area to reduce, the buck resistance to flow increases in the pipe, and defeated grey power consumption increases, and directly influences the safety and economic operation of unit.
At present the technology that ash conveying pipe is adopted mainly contain add that acid treatment, stove cigarette are handled, pre-crystallization before the pipe, lime-ash mix and remove, active seed mixes antiscale method, electric precipitation ash pipeline and water film dedusting ash pipeline and is used alternatingly, adds Scale inhibitors, magnetizes processing or the like with inert seed." environmental protection for electric power " 1994 the 2nd phases " power station, Baoji buck adds the acid system summary " and " Jiangxi Electric Power " 2002 the 4th phases articles such as " man's Wei of Jiujiang power plant dust-flushing field buck add acid and administers engineering design " discloses a kind of acid-treated technology that adds, its weak point is that pickling descaling need stop ash-transmission system, consume a large amount of acid, operational condition is comparatively abominable, labour intensity is big, add sour preventing fouling simultaneously in actual applications, easily cause ingress's acid amount superfluous, cause corrosive pipeline; " east china electric power " 2003 the 3rd phases " 1025t/h boiler cigarette is handled the ash water system good antiscale property and handled " literary composition discloses a kind of stove cigarette treatment process, its stove cigarette processing can cause final dusting not pass a test, absorption tower outlet conduit and roots blower dust stratification are seriously until latch up phenomenon, and the running maintenance workload is big; The precipitator method need add acid or logical flue gas before the pipe, easily bring and above-mentioned two kinds of problems that method is identical, perhaps in buck, add Scale inhibitors or dispersion agent, because, suspension object height big towards the turbidity of buck, medicament is easy to be adsorbed and causes effect to descend, and the reagent consumption amount increases; Special rubber--the Mc nylon pipe exists intensity low, and is fragile, and industrial application is restricted; " China Power " 1994 the 9th phases " ash water of coal-fired power plant closed circuit circulatory system preventing fouling---active seed mixes the antiscale method with inert seed " and the 05th phase of " thermal power generation " nineteen ninety-five " thermal power plant's closed circulating system of ash sluicing water adopts active seed to mix the experimental study of antiscale method with inert seed " disclose active seed and have mixed the antiscale method with inert seed, but this method requires to remove the carbonate in the buck, the enforcement difficulty is big, does not also see at present and applies; " middle nitrogenous fertilizer " the 02nd phase in 2003 " the pulverized coal firing boiler flushing cinder is administered brief summary towards buck " discloses a kind of lime-ash and has mixed division, but this method is easily to the tubing abrasion, and especially in pipe bent position and ash pipe bottom, and the ash pipe top still can fouling; The method of disclosed magnetization processing of the 1st phase of " environmental protection for electric power " calendar year 2001 " application of higher frequency electromagnetic field preventing fouling on the buck recovery channel " buck is relevant with the intensity in magnetic field, magnetic journey etc., dirt very easily deposits at the back segment of ash pipeline, the necessary staging treating of the pipe-line transportation of therefore long distance causes the equipment input bigger; Equally also there are this problem in electronic hydrotreater or electrostatic-scaling device; Additive method often also exists the processing cost height in addition, the equipment complexity, and management is inconvenient, and effect is not very desirable, and some method also only rests on experimental stage.In addition because SO
4 2-, pH, F
-Etc. the interference effect that factor is separated out the crystallization of calcium dirt, its mechanism is comparatively complicated, thereby has increased the intractability of ash pipeline.Therefore an effective terms of settlement is not found in the antiscale of ash pipeline so far as yet, and is not high to the antiscaling effect of backwater, causes the reclamation rate of water lower, only at 40%-70%.
Summary of the invention
Ash water of coal-fired power plant reuse technology of the present invention and reuse closed cycle system thereof have solved ash pipeline line and return piping fouling and the lower problem of backwater reclamation rate in the prior art, have realized ash water recycling and closed cycle.
Technical scheme of the present invention is as follows:
Ash water of coal-fired power plant reuse technology of the present invention, step mainly comprises washing, precipitation, Ash Water Separator, backwater after the Ash Water Separator carries out pre-treatment earlier, be that backwater after the Ash Water Separator added dirt dispersion agent and carries out pre-treatment before washing, backwater scrubbing dust collection under the effect of dirt dispersion agent then, described dirt dispersion agent contain N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 10～20% of weight percent, phosphine carboxylic acid 10～30%, by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, the tetrapolymer 30～40% that 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids form and the water of surplus; Buck after the washing adds precipitation agent and carries out the complexing sedimentation, carries out Ash Water Separator then, forms ash water recycling closed cycle technology.
The add-on of the dirt dispersion agent described in the technology is preferably 1～4mg/L, and the add-on of precipitation agent is preferably 10～20mg/L.
Precipitation agent described in the technology contains Sodium salts humic acids 5～20%, trisodium citrate 5～10%, sulfonated lignin 5～15%, yellow soda ash 60～75%, sodium bicarbonate 0～5% and the sodium hydroxide 0～5% of weight percent; Described phosphine carboxylic acid is a 2-phosphonic acid butane-1,2, the 4-tricarboxylic acid.
The ash water of coal-fired power plant reuse closed cycle system of the ash water of coal-fired power plant reuse technology that enforcement of the present invention is above-mentioned, include washing device, equalizing tank, concentrating and precipitating pond, Hui Chang, come out to add described precipitation agent before buck through equalizing tank enters the concentrating and precipitating pond from washing device, after the complexing sedimentation, mortar is delivered to the ash field through ash pipeline by pump; Between ash field and washing device, be provided with the backwater pretreatment pool; a backwater that comes out from ash field adds described dirt dispersion agent when entering the backwater pretreatment pool after; deliver to washing device by back water pump; buck after the washing enters equalizing tank again; constitute the ash water recycling closed cycle system, described dirt dispersion agent contains N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 10～20% of weight percent; phosphine carboxylic acid 10～30%; by vinylformic acid; 2-acrylamido-2-methyl propane sulfonic acid; the tetrapolymer 30～40% that 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids form and the water of surplus.
Buck described in the system enters that the add-on of precipitation agent is preferably 10～20mg/L before the concentrating and precipitating pond, and the add-on of backwater dirt dispersion agent when entering the backwater pretreatment pool is preferably 1～4mg/L.
Precipitation agent described in the system contains Sodium salts humic acids 5～20%, trisodium citrate 5～10%, sulfonated lignin 5～15%, yellow soda ash 60～75%, sodium bicarbonate 0～5% and the sodium hydroxide 0～5% of weight percent; Described phosphine carboxylic acid is a 2-phosphonic acid butane-1,2, the 4-tricarboxylic acid.
The invention has the beneficial effects as follows:
Ash water of coal-fired power plant reuse technology of the present invention and reuse closed cycle system thereof have dedusting, desulfurization, water saving, characteristics such as efficient, calculate at 1: 20 by cement-water ratio, and the reclamation rate of buck reaches more than 90%, and the backwater scale inhibition performance can reach 94.1%; Precipitation agent of the present invention and dirt dispersion agent are adding less simultaneously, and cost is low, and original system is changed not quite, and be workable, has broad prospect for its application.
Description of drawings
Fig. 1 is an ash water of coal-fired power plant recovering process flow synoptic diagram
Fig. 2 is an ash water of coal-fired power plant reuse closed cycle system synoptic diagram
Embodiment
Embodiment 1
Ash water of coal-fired power plant reuse technology as depicted in figs. 1 and 2 and reuse closed cycle system thereof, the buck that comes out from washing tower in the washing back is introduced into equalizing tank, remove disintegrating slag again, precipitate then, add precipitation agent 15mg by every liter of buck before promptly entering the concentrating and precipitating pond, after the complexing sedimentation, by ash pump mortar is delivered to the ash field through ash pipeline and carries out Ash Water Separator again, promptly add 1～2mg/L polyacrylamide and carry out flocculating settling at Hui Chang, the backwater that comes out from the ash field after the sedimentation carries out pre-treatment earlier, be that backwater is introduced into the backwater pretreatment pool that is located between ash field and the washing tower, add dirt dispersion agent 3mg by every liter of backwater simultaneously, backwater is delivered to washing tower by back water pump and is carried out scrubbing dust collection under the effect of dirt dispersion agent, enter equalizing tank then and dash ash again, constitute ash water recycling closed cycle technology and system, realize recycle, measure backwater scale inhibition performance and pH value, the results are shown in Table 1.
Material preparation precipitation agent and dirt dispersion agent by following weight percent:
Precipitation agent: Sodium salts humic acids 20%, trisodium citrate 5%, sulfonated lignin 5%, yellow soda ash 60%, sodium bicarbonate 5% and sodium hydroxide 5%.
Dirt dispersion agent: N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 10%, 2-phosphonic acid butane-1; 2,4-tricarboxylic acid 30%, the tetrapolymer 40% and the distilled water 20% that form by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids.
Embodiment 2
Material preparation precipitation agent and dirt dispersion agent by following weight percent:
Precipitation agent: Sodium salts humic acids 18%, trisodium citrate 5%, sulfonated lignin 7%, yellow soda ash 62%, sodium bicarbonate 4% and sodium hydroxide 4%.
Dirt dispersion agent: N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 10%, 2-phosphonic acid butane-1; 2,4-tricarboxylic acid 20%, the tetrapolymer 40% and the distilled water 30% that form by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids.
The dosage of precipitation agent is 10mg/L, and the dosage of dirt dispersion agent is 2mg/L, and other no longer repeats with embodiment 1, the results are shown in Table 1.
Embodiment 3
Material preparation precipitation agent and dirt dispersion agent by following weight percent:
Precipitation agent: Sodium salts humic acids 16%, trisodium citrate 6%, sulfonated lignin 8%, yellow soda ash 64%, sodium bicarbonate 3% and sodium hydroxide 3%.
Dirt dispersion agent: N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 15%, 2-phosphonic acid butane-1; 2,4-tricarboxylic acid 30%, the tetrapolymer 30% and the distilled water 25% that form by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids.
The dosage of precipitation agent is 12mg/L, and the dosage of dirt dispersion agent is 1mg/L, and washing device is a water dust scrubber, and other no longer repeats with embodiment 1, the results are shown in Table 1.
Embodiment 4
Material preparation precipitation agent and dirt dispersion agent by following weight percent:
Precipitation agent: Sodium salts humic acids 15%, trisodium citrate 10%, sulfonated lignin 5%, yellow soda ash 66%, sodium bicarbonate 2% and sodium hydroxide 2%.
Dirt dispersion agent: N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 15%, 2-phosphonic acid butane-1; 2,4-tricarboxylic acid 20%, the tetrapolymer 30% and the distilled water 35% that form by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids.
The dosage of precipitation agent is 20mg/L, and the dosage of dirt dispersion agent is 4mg/L, and other no longer repeats with embodiment 1, the results are shown in Table 1.
Embodiment 5
Material preparation precipitation agent and dirt dispersion agent by following weight percent:
Precipitation agent: Sodium salts humic acids 14%, trisodium citrate 6%, sulfonated lignin 10%, yellow soda ash 68%, sodium bicarbonate 1% and sodium hydroxide 1%.
Dirt dispersion agent: N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 20%, 2-phosphonic acid butane-1; 2,4-tricarboxylic acid 10%, the tetrapolymer 30% and the distilled water 40% that form by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids.
The dosage of precipitation agent is 14mg/L, and the dosage of dirt dispersion agent is 2mg/L, and other no longer repeats with embodiment 1, the results are shown in Table 1.
Embodiment 6
Material preparation precipitation agent and dirt dispersion agent by following weight percent:
Precipitation agent: Sodium salts humic acids 12%, trisodium citrate 10%, sulfonated lignin 8% and yellow soda ash 70%.
Dirt dispersion agent: N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 20%, 2-phosphonic acid butane-1; 2,4-tricarboxylic acid 10%, the tetrapolymer 40% and the distilled water 30% that form by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids.
The dosage of precipitation agent is 15mg/L, and the dosage of dirt dispersion agent is 2mg/L, and other no longer repeats with embodiment 1, the results are shown in Table 1.
Embodiment 7
Material preparation precipitation agent and dirt dispersion agent by following weight percent:
Precipitation agent: Sodium salts humic acids 10%, trisodium citrate 9%, sulfonated lignin 10% and yellow soda ash 71%.
Dirt dispersion agent: N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 10%, 2-phosphonic acid butane-1; 2,4-tricarboxylic acid 20%, the tetrapolymer 30% and the distilled water 40% that form by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids.
The dosage of precipitation agent is 18mg/L, and the dosage of dirt dispersion agent is 4mg/L, and other no longer repeats with embodiment 1, the results are shown in Table 1.
Embodiment 8
Material preparation precipitation agent and dirt dispersion agent by following weight percent:
Precipitation agent: Sodium salts humic acids 8%, trisodium citrate 7%, sulfonated lignin 13% and yellow soda ash 72%.
Dirt dispersion agent: N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 15%, 2-phosphonic acid butane-1; 2,4-tricarboxylic acid 20%, the tetrapolymer 40% and the distilled water 25% that form by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids.
The dosage of precipitation agent is 15mg/L, and the dosage of dirt dispersion agent is 3mg/L, and other no longer repeats with embodiment 1, the results are shown in Table 1.
Embodiment 9
Material preparation precipitation agent and dirt dispersion agent by following weight percent:
Precipitation agent: Sodium salts humic acids 6%, trisodium citrate 6%, sulfonated lignin 15% and yellow soda ash 73%.
Dirt dispersion agent: N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 20%, 2-phosphonic acid butane-1; 2,4-tricarboxylic acid 20%, the tetrapolymer 40% and the distilled water 20% that form by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids.
The dosage of precipitation agent is 18mg/L, and the dosage of dirt dispersion agent is 4mg/L, and other no longer repeats with embodiment 1, the results are shown in Table 1.
Embodiment 10
Material preparation precipitation agent and dirt dispersion agent by following weight percent:
Precipitation agent: Sodium salts humic acids 5%, trisodium citrate 5%, sulfonated lignin 15% and yellow soda ash 75%.
Dirt dispersion agent: N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 15%, 2-phosphonic acid butane-1; 2,4-tricarboxylic acid 10%, the tetrapolymer 40% and the distilled water 35% that form by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids.
The dosage of precipitation agent is 10mg/L, and the dosage of dirt dispersion agent is 1mg/L, and other no longer repeats with embodiment 1, the results are shown in Table 1.
The contrast table of the backwater scale inhibition performance of the backwater scale inhibition performance of table 1 different embodiments of the invention, pH value and other dirt dispersion agent
| Embodiment | The backwater scale inhibition performance, % | The pH value |
| Embodiment 1 | 90.4 | 13.2 |
| Embodiment 2 | 88.7 | 13.0 |
| Embodiment 3 | 87.2 | 12.7 |
| Embodiment 4 | 94.1 | 12.2 |
| Embodiment 5 | 86.8 | 11.6 |
| Embodiment 6 | 90.6 | 11.7 |
| Embodiment 7 | 93.2 | 11.3 |
| Embodiment 8 | 92.6 | 11.5 |
| Embodiment 9 | 93.8 | 11.5 |
| Embodiment 10 | 85.4 | 11.3 |
| Amino three methane phosphonic acid TMP (2mg/L)/hydrolyzed polymaleic anhydride HPMA (2mg/L) | 75.2 | 12.6 |
| Amino three methane phosphonic acid TMP (2mg/L)/hydrolyzed polymaleic anhydride HPMA (4mg/L) | 80.4 | 11.4 |
Backwater scale inhibition performance of the present invention will be far above the backwater scale inhibition performance that adds dirt dispersion agent ATMP/HPMA commonly used under the condition of the dirt dispersion agent of same amount as can be seen from Table 1.
Claims (8)
1, a kind of ash water of coal-fired power plant reuse technology, step mainly comprises washing, precipitation, Ash Water Separator, backwater after the Ash Water Separator carries out pre-treatment earlier, be that backwater after the Ash Water Separator added dirt dispersion agent and carries out pre-treatment, backwater scrubbing dust collection under the effect of dirt dispersion agent then before washing; Buck after the washing adds precipitation agent and carries out the complexing sedimentation; carry out Ash Water Separator then; form ash water recycling closed cycle technology, it is characterized in that described dirt dispersion agent contains N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 10～20% of weight percent, phosphine carboxylic acid 10～30%, the tetrapolymer 30～40% that forms by vinylformic acid, 2-acrylamido-2-methyl propane sulfonic acid, 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids and the water of surplus.
2, ash water of coal-fired power plant reuse technology according to claim 1, the add-on that it is characterized in that described dirt dispersion agent is 1～4mg/L, the add-on of precipitation agent is 10～20mg/L.
3, ash water of coal-fired power plant reuse technology according to claim 1 and 2 is characterized in that described precipitation agent contains the Sodium salts humic acids 5～20% of weight percent, trisodium citrate 5～10%, sulfonated lignin 5～15%, yellow soda ash 60～75%, sodium bicarbonate 0～5% and sodium hydroxide 0～5%.
4, ash water of coal-fired power plant reuse technology according to claim 1 is characterized in that described phosphine carboxylic acid is a 2-phosphonic acid butane-1,2, the 4-tricarboxylic acid.
5, a kind of ash water of coal-fired power plant reuse closed cycle system of implementing the described ash water of coal-fired power plant reuse technology of claim 1, include washing device, equalizing tank, concentrating and precipitating pond, Hui Chang, come out to add described precipitation agent before buck through equalizing tank enters the concentrating and precipitating pond from washing device, after the complexing sedimentation, mortar is delivered to the ash field through ash pipeline by pump; Between ash field and washing device, be provided with the backwater pretreatment pool; a backwater that comes out from ash field adds described dirt dispersion agent when entering the backwater pretreatment pool after; deliver to washing device by back water pump; buck after the washing enters equalizing tank again; constitute the ash water recycling closed cycle system, it is characterized in that described dirt dispersion agent contains N-phosphonate group-N-sulfonic group-N '-dicarboxyl quadrol 10～20% of weight percent; phosphine carboxylic acid 10～30%; by vinylformic acid; 2-acrylamido-2-methyl propane sulfonic acid; the tetrapolymer 30～40% that 2-hydroxyl-2-phosphine acyl acetic acid and phosphonic acids form and the water of surplus.
6, ash water of coal-fired power plant reuse closed cycle system according to claim 5, it is characterized in that described buck enters that the add-on of precipitation agent is 10～20mg/L before the concentrating and precipitating pond, the add-on of backwater dirt dispersion agent when entering the backwater pretreatment pool is 1～4mg/L.
7, according to claim 5 or 6 described ash water of coal-fired power plant reuse closed cycle systems, it is characterized in that described precipitation agent contains the Sodium salts humic acids 5～20% of weight percent, trisodium citrate 5～10%, sulfonated lignin 5～15%, yellow soda ash 60～75%, sodium bicarbonate 0～5% and sodium hydroxide 0～5%.
8, ash water of coal-fired power plant reuse closed cycle system according to claim 5 is characterized in that described phosphine carboxylic acid is a 2-phosphonic acid butane-1,2, the 4-tricarboxylic acid.
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| CN100412000C (en) * | 2006-06-05 | 2008-08-20 | 中国铝业股份有限公司 | Treatment method for ash water of heating and power plant |
| CN102336496B (en) * | 2011-08-24 | 2013-02-27 | 中国五环工程有限公司 | Method for treating and recycling ash water in dry coal dust gasification device |
| US9617179B2 (en) * | 2013-03-14 | 2017-04-11 | Massachusetts Institute Of Technology | Ion sequestration for scale prevention in high-recovery desalination systems |
| CN104129868B (en) * | 2013-05-02 | 2016-05-18 | 王延军 | The technique of wastewater treatment and reclamation set and processing waste water |
| US9969638B2 (en) | 2013-08-05 | 2018-05-15 | Gradiant Corporation | Water treatment systems and associated methods |
| CN105683095B (en) | 2013-09-23 | 2019-09-17 | 格雷迪安特公司 | Desalination system and correlation technique |
| US10308526B2 (en) | 2015-02-11 | 2019-06-04 | Gradiant Corporation | Methods and systems for producing treated brines for desalination |
| US10167218B2 (en) | 2015-02-11 | 2019-01-01 | Gradiant Corporation | Production of ultra-high-density brines |
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| WO2017030937A1 (en) | 2015-08-14 | 2017-02-23 | Gradiant Corporation | Production of multivalent ion-rich process streams using multi-stage osmotic separation |
| WO2017030932A1 (en) | 2015-08-14 | 2017-02-23 | Gradiant Corporation | Selective retention of multivalent ions |
| CN105293726A (en) * | 2015-11-17 | 2016-02-03 | 新疆环境工程技术有限责任公司 | Scale inhibition and dispersion agent of high-temperature gas washing water system and treatment method thereof |
| WO2017147113A1 (en) | 2016-02-22 | 2017-08-31 | Gradiant Corporation | Hybrid desalination systems and associated methods |
| SG11202101293TA (en) | 2018-08-22 | 2021-03-30 | Gradiant Corp | Liquid solution concentration system comprising isolated subsystem and related methods |
| CA3197204A1 (en) | 2020-11-17 | 2022-05-27 | Richard STOVER | Osmotic methods and systems involving energy recovery |
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