CN103435185A - Treatment method for boiler wastewater - Google Patents
Treatment method for boiler wastewater Download PDFInfo
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- CN103435185A CN103435185A CN2013103750363A CN201310375036A CN103435185A CN 103435185 A CN103435185 A CN 103435185A CN 2013103750363 A CN2013103750363 A CN 2013103750363A CN 201310375036 A CN201310375036 A CN 201310375036A CN 103435185 A CN103435185 A CN 103435185A
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Abstract
The invention discloses a treatment method for boiler wastewater. The treatment method comprises the following steps: (1) adding 1-3 percent by weight of ferrous sulfate into boiler water at room temperature; (2) stirring the boiler water for 10-15 minutes and naturally settling after stirring; (3) adding propyl cellulose, wherein the amount of added propyl cellulose is 2-3 percent by weight of the boiler water; (4) stirring the boiler water for 20-35 min, and naturally settling after stirring; (5) taking supernatant out, passing the supernatant through a quartz sand filter material, and filtering to obtain treated boiler wastewater, wherein the mesh number of the quartz sand is 300-500. After the boiler wastewater is treated by the treatment method, the CODcr (Chemical Oxygen Demand) value in the wastewater is reduced from 1360 mg/L to 13-18 mg/L, and the calcium ion content is reduced from 54 mg/L to 0.5-0.9 mg/L.
Description
Technical field
The present invention relates to a kind for the treatment of process of waste water, particularly relate to a kind for the treatment of process of boiler wastewater.
Background technology
Boiler in use, can produce a large amount of pollutents.Also can produce a large amount of foulings simultaneously.Wherein the total amount of calcium ion is severe overweight, and the value of its chemical oxygen demand (COD) is also higher simultaneously, by the processing of certain way, can reduce the chemical oxygen demand total amount in boiler wastewater, but the removal effect of calcium ion is not ideal.The method that can simultaneously reduce chemical oxygen demand total amount in boiler wastewater and calcium ion concn in method commonly used is less.Therefore, we are necessary to develop and a kind ofly can reduce calcium ion concn in boiler wastewater and the method for chemical oxygen demand total amount simultaneously.
Summary of the invention
?the technical problem solved: the higher problem of CODcr value and calcium ion concn in boiler wastewater.
Technical scheme: the invention discloses a kind for the treatment of process of boiler wastewater, treatment step is as follows: add ferrous sulfate under (1) room temperature in feedwater, the ferrous sulfate add-on is 1wt%～3wt%; (2) feedwater is stirred to 10～15min, natural subsidence after stirring; (3) add again propyl cellulose, 2wt%～3wt% that add-on is feedwater weight; (4) feedwater is stirred to 20～35min, natural subsidence after stirring; (5) take out supernatant liquor, then supernatant liquor is passed through to quartz sand filter media, quartzy Grains number is 300～500 orders, obtains processing boiler wastewater later after filtration.
Wherein, the ferrous sulfate add-on is preferably the 2wt% of boiler wastewater weight; After adding ferrous sulfate, churning time is preferably 15min; The propyl cellulose add-on is preferably the 3wt% of boiler wastewater weight; Quartzy Grains number is preferably 500 orders.
Beneficial effect: after processing boiler wastewater by method of wastewater treatment of the present invention, in boiler wastewater, the CODcr value is down to 13～18mg/L from 1360mg/L, and calcium ion content is down to 0.5～0.9mg/L from 54mg/L.Treatment process of the present invention has the function that simultaneously significantly reduces the boiler water pollutant.
Embodiment
Embodiment 1
(1) add ferrous sulfate under room temperature in feedwater, the ferrous sulfate add-on is 3wt%; (2) feedwater is stirred to 10min, natural subsidence after stirring; (3) add again propyl cellulose, the 2wt% that add-on is feedwater weight; (4) feedwater is stirred to 20min, natural subsidence after stirring; (5) take out supernatant liquor, then supernatant liquor is passed through to quartz sand filter media, quartzy Grains number is 300 orders, obtains processing boiler wastewater later after filtration.
Embodiment 2
(1) add ferrous sulfate under room temperature in feedwater, the ferrous sulfate add-on is 2wt%; (2) feedwater is stirred to 15min, natural subsidence after stirring; (3) add again propyl cellulose, the 2wt% that add-on is feedwater weight; (4) feedwater is stirred to 30min, natural subsidence after stirring; (5) take out supernatant liquor, then supernatant liquor is passed through to quartz sand filter media, quartzy Grains number is 400 orders, obtains processing boiler wastewater later after filtration.
Embodiment 3
(1) add ferrous sulfate under room temperature in feedwater, the ferrous sulfate add-on is 1wt%; (2) feedwater is stirred to 12min, natural subsidence after stirring; (3) add again propyl cellulose, the 3wt% that add-on is feedwater weight; (4) feedwater is stirred to 35min, natural subsidence after stirring; (5) take out supernatant liquor, then supernatant liquor is passed through to quartz sand filter media, quartzy Grains number is 500 orders, obtains processing boiler wastewater later after filtration.
Before processing, in boiler wastewater, the CODcr value is 1360mg/L, and calcium ion content is 54mg/L.After embodiment 1, embodiment 2, embodiment 3 process, in boiler wastewater, CODcr value and calcium ion content are as follows.
| ? | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| CODcr value (mg/L) | 14 | 18 | 13 |
| Calcium ion content (mg/L) | 0.5 | 0.8 | 0.9 |
As can be seen from the table, process later the total amount of pollutant in boiler wastewater and obtained remarkable decline.
Claims (5)
1. the treatment process of a boiler wastewater, it is characterized in that treatment step is as follows: add ferrous sulfate under (1) room temperature in feedwater, the ferrous sulfate add-on is 1wt%～3wt%; (2) feedwater is stirred to 10～15min, natural subsidence after stirring; (3) add again propyl cellulose, 2wt%～3wt% that add-on is feedwater weight; (4) feedwater is stirred to 20～35min, natural subsidence after stirring; (5) take out supernatant liquor, then supernatant liquor is passed through to quartz sand filter media, quartzy Grains number is 300～500 orders, obtains processing boiler wastewater later after filtration.
2. the treatment process of a kind of boiler wastewater according to claim 1, is characterized in that the 2wt% that the ferrous sulfate add-on is boiler wastewater weight.
3. the treatment process of a kind of boiler wastewater according to claim 1, it is characterized in that adding churning time after ferrous sulfate is 15min.
4. the treatment process of a kind of boiler wastewater according to claim 1, is characterized in that the 3wt% that the propyl cellulose add-on is boiler wastewater weight.
5. the treatment process of a kind of boiler wastewater according to claim 1, is characterized in that quartzy Grains number is 500 orders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103750363A CN103435185A (en) | 2013-08-26 | 2013-08-26 | Treatment method for boiler wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103750363A CN103435185A (en) | 2013-08-26 | 2013-08-26 | Treatment method for boiler wastewater |
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| Publication Number | Publication Date |
|---|---|
| CN103435185A true CN103435185A (en) | 2013-12-11 |
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| CN2013103750363A Pending CN103435185A (en) | 2013-08-26 | 2013-08-26 | Treatment method for boiler wastewater |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108328852A (en) * | 2017-12-28 | 2018-07-27 | 昆山奕盛来环境科技有限公司 | A kind of processing equipment of boiler waste gas waste water |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891319A (en) * | 2010-07-13 | 2010-11-24 | 佛山市三水区大塘污水处理有限公司 | Alkaline printing and dyeing wastewater materialization pretreatment method and system |
| CN102167462A (en) * | 2011-05-27 | 2011-08-31 | 新疆中泰化学（集团）股份有限公司 | Chemical oxygen demand (COD) sewage treatment method in production of polyvinyl chloride resin through calcium carbide acetylene method |
-
2013
- 2013-08-26 CN CN2013103750363A patent/CN103435185A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101891319A (en) * | 2010-07-13 | 2010-11-24 | 佛山市三水区大塘污水处理有限公司 | Alkaline printing and dyeing wastewater materialization pretreatment method and system |
| CN102167462A (en) * | 2011-05-27 | 2011-08-31 | 新疆中泰化学（集团）股份有限公司 | Chemical oxygen demand (COD) sewage treatment method in production of polyvinyl chloride resin through calcium carbide acetylene method |
Non-Patent Citations (2)
| Title |
|---|
| 倪海明等: "纤维素吸附材料的研究进展", 《大众科技》 * |
| 陈皓等: "经济絮凝剂优化处理印染废水实验研究", 《江苏环境科技》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108328852A (en) * | 2017-12-28 | 2018-07-27 | 昆山奕盛来环境科技有限公司 | A kind of processing equipment of boiler waste gas waste water |
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Application publication date: 20131211 |