CN105481068A - Thermal power plant ash residue water treatment method - Google Patents
Thermal power plant ash residue water treatment method Download PDFInfo
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- CN105481068A CN105481068A CN201410472398.9A CN201410472398A CN105481068A CN 105481068 A CN105481068 A CN 105481068A CN 201410472398 A CN201410472398 A CN 201410472398A CN 105481068 A CN105481068 A CN 105481068A
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- power plant
- thermal power
- hydrochloric acid
- red mud
- treatment method
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- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention discloses a thermal power plant ash residue water treatment method, which comprises: drying red mud, grinding, screening with a 100-300 mesh sieve, carrying out calcining activation by using Na2CO3 as an auxiliary agent, and adding hydrochloric acid to adjust the pH value to 6.0-7.2 to obtain a liquid flocculant; and adding the prepared flocculant to the ash residue water treatment system of a thermal power plant, and completely mixing the flocculant and the ash residue water discharged from thermal power plant so as to reduce the suspended solid content in the ash residue water. The thermal power plant ash residue water treatment method of the present invention has the following advantages that the raw materials are easy to obtain, wherein in the alumina plant, the thermal power plant supplies steam required by the production of the alumina plant, and the red mud is the pollutant waste residue generated during the alumina production process, such that the raw materials are rich; the liquid flocculant preparation process is simple, and the storage is easy; and the operation of the treatment method is simple, the wastewater treatment effect is good, and the cost is low.
Description
Technical field
The present invention relates to a kind for the treatment of method for ash water of heating and power plant, relate to solid waste red mud recycling field specifically, refer more particularly to a kind of method utilizing Bayer process red mud to make flocculation agent process heat power plant clinker water.
Background technology
Heat power plant generally adopts interpolation flocculation agent to its treatment method for ash water discharged, and improves the settling property of suspended substance in clinker water, substantially increases post precipitation treatment effect, reaches the object of purification clinker water.But this kind of method exists the high shortcoming of reagent cost, the cost of flocculation agent is generally about treatment total cost half.
Red mud is produced pollution waste residue in aluminum oxide production process, and the content of each composition of Bayer process red mud is: SiO
23%-20%, CaO
2%-8%, Al
2o
310%-20%, Fe
2o
330%-40%, average is often produced 1 ton of aluminum oxide and is about produced red mud more than 1.5 tons.A large amount of red muds can not fully effectively utilize, and large-area stockyard can only be relied on to stack, occupy a large amount of soil, also cause serious pollution to environment.The production of a large amount of red muds to the production of the mankind, life cause many-sided directly and affect indirectly, so reduce output and the harm of red mud to greatest extent, realize red mud resource utilization by all kinds of means extremely urgent.
Summary of the invention
For solving the problems of the technologies described above, the object of this invention is to provide the method for a kind of heat power plant treatment, while producing refuse (red mud) in recycling alumina producing, the process heat power plant clinker water of efficient economy.Technical scheme of the present invention is: first dried by red mud, ground 100-300 mesh sieve, with Na
2cO
3for fusing assistant calcination activation, add hydrochloric acid and adjust about pH to 6.0-7.2, obtain liquid flocculation agent; Joined in the treatment system of heat power plant by the flocculation agent made, the clinker water that flocculation agent and heat power plant are discharged fully mixes, thus reduces the suspension content in clinker water.
Maturing temperature is 500-800 DEG C, and soak time is 2.0h.
Described hydrochloric acid is technical hydrochloric acid, and concentration is 30%, and input ratio is 1:1-3 by red mud and hydrochloric acid soln mass ratio.
Treatment method for ash water of heating and power plant, directly enters flocculation sedimentation tank by the liquid flocculant concentration made, and every cubic metre of clinker water flocculant dosage is 10-100ml.
Advantage of the present invention is as follows:
1. raw material of the present invention is easy to get, and in alumina producer, heat power plant produces for alumina producer and provides required steam, and red mud is the contaminative waste residue of the generation of producing in alumina process, therefore abundant raw material.With Na
2cO
3for fusing assistant calcination activation, through roasting, the SiO in red mud
2, CaO
2, Al
2o
3, Fe
2o
3destroyed in crystal, the metal ions such as contained sodium, silicon, calcium, aluminium, iron transfer active ion to, participate in reaction.
2. in the present invention, liquid flocculating agent formulation process is simple, is easy to store.
3. in the present invention, treatment process is simple to operate, and process waste water effect is better, and cost is low.
Embodiment
Embodiment 1
First dried by red mud, ground 200 mesh sieves, with Na
2cO
3for fusing assistant calcination activation, add hydrochloric acid and adjust about pH to 6.0, obtain liquid flocculation agent; Joined in the treatment system of heat power plant by the flocculation agent made, the clinker water that flocculation agent and heat power plant are discharged fully mixes, thus reduces the suspension content in clinker water.
Maturing temperature is 800 DEG C, and soak time is 3h.
Described hydrochloric acid is technical hydrochloric acid, and concentration is 30%, and input ratio is 1:2 by red mud and hydrochloric acid soln mass ratio.
Treatment method for ash water of heating and power plant, directly enters flocculation sedimentation tank by the liquid flocculant concentration made, and every cubic metre of clinker water flocculant dosage is 50ml.
Embodiment 2
First dried by red mud, ground 100 mesh sieves, with Na
2cO
3for fusing assistant calcination activation, add hydrochloric acid and adjust about pH to 6.8, obtain liquid flocculation agent; Joined in the treatment system of heat power plant by the flocculation agent made, the clinker water that flocculation agent and heat power plant are discharged fully mixes, thus reduces the suspension content in clinker water.
Maturing temperature is 500 DEG C, and soak time is 2.0h.
Described hydrochloric acid is technical hydrochloric acid, and concentration is 30%, and input ratio is 1:1 by red mud and hydrochloric acid soln mass ratio.
Treatment method for ash water of heating and power plant, directly enters flocculation sedimentation tank by the liquid flocculant concentration made, and every cubic metre of clinker water flocculant dosage is 10ml.
Embodiment 3
First dried by red mud, ground 300 mesh sieves, with Na
2cO
3for fusing assistant calcination activation, add hydrochloric acid and adjust about pH to 7.2, obtain liquid flocculation agent; Joined in the treatment system of heat power plant by the flocculation agent made, the clinker water that flocculation agent and heat power plant are discharged fully mixes, thus reduces the suspension content in clinker water.
Maturing temperature is 600 DEG C, and soak time is 3.5h.
Described hydrochloric acid is technical hydrochloric acid, and concentration is 30%, and input ratio is 1:3 by red mud and hydrochloric acid soln mass ratio.
Treatment method for ash water of heating and power plant, directly enters flocculation sedimentation tank by the liquid flocculant concentration made, and every cubic metre of clinker water flocculant dosage is 100ml.
Embodiment 4
First dried by red mud, ground 200 mesh sieves, with Na
2cO
3for fusing assistant calcination activation, add hydrochloric acid and adjust about pH to 6.0, obtain liquid flocculation agent; Joined in the treatment system of heat power plant by the flocculation agent made, the clinker water that flocculation agent and heat power plant are discharged fully mixes, thus reduces the suspension content in clinker water.
Maturing temperature is 700 DEG C, and soak time is 2.5h.
Described hydrochloric acid is technical hydrochloric acid, and concentration is 30%, and input ratio is 1:2.5 by red mud and hydrochloric acid soln mass ratio.
Treatment method for ash water of heating and power plant, directly enters flocculation sedimentation tank by the liquid flocculant concentration made, and every cubic metre of clinker water flocculant dosage is 75ml.
Claims (4)
1. a treatment method for ash water of heating and power plant, is characterized in that: first dried by red mud, ground 100-300 mesh sieve, with Na
2cO
3for fusing assistant calcination activation, add hydrochloric acid and adjust pH to 6.0-7.2, obtain liquid flocculation agent; Joined in the treatment system of heat power plant by the flocculation agent made, the clinker water that flocculation agent and heat power plant are discharged fully mixes, thus reduces the suspension content in clinker water.
2. red mud roasting process according to claim 1, it is characterized in that, maturing temperature is 500-800 DEG C, and soak time is 2.0-3.5h.
3. adjust pH process according to claim 1, is characterized in that, described hydrochloric acid is technical hydrochloric acid, and concentration is 30%, and input ratio is 1:1-3 by red mud and hydrochloric acid soln mass ratio.
4. treatment method for ash water of heating and power plant according to claim 1, it is characterized in that directly the liquid flocculant concentration made being entered flocculation sedimentation tank, dosage is 10-100ml/m3 clinker water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410472398.9A CN105481068A (en) | 2014-09-16 | 2014-09-16 | Thermal power plant ash residue water treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410472398.9A CN105481068A (en) | 2014-09-16 | 2014-09-16 | Thermal power plant ash residue water treatment method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105481068A true CN105481068A (en) | 2016-04-13 |
Family
ID=55668403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410472398.9A Pending CN105481068A (en) | 2014-09-16 | 2014-09-16 | Thermal power plant ash residue water treatment method |
Country Status (1)
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|---|---|
| CN (1) | CN105481068A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116351855A (en) * | 2023-05-17 | 2023-06-30 | 江苏集萃功能材料研究所有限公司 | Method for recycling red mud solid waste by crystal modification coupling mineralization technology |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993013017A1 (en) * | 1991-12-27 | 1993-07-08 | Alcan International Limited | Improved process for separating red mud in production of alumina from bauxite |
| CN1868912A (en) * | 2006-06-05 | 2006-11-29 | 中国铝业股份有限公司 | Treatment method for ash water of heating and power plant |
| CN102344171A (en) * | 2010-07-30 | 2012-02-08 | 孙建之 | New method for resource comprehensive utilization of red mud and fly ash |
-
2014
- 2014-09-16 CN CN201410472398.9A patent/CN105481068A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993013017A1 (en) * | 1991-12-27 | 1993-07-08 | Alcan International Limited | Improved process for separating red mud in production of alumina from bauxite |
| CN1868912A (en) * | 2006-06-05 | 2006-11-29 | 中国铝业股份有限公司 | Treatment method for ash water of heating and power plant |
| CN102344171A (en) * | 2010-07-30 | 2012-02-08 | 孙建之 | New method for resource comprehensive utilization of red mud and fly ash |
Non-Patent Citations (1)
| Title |
|---|
| 顾玲等: "聚硅酸铝铁絮凝剂的制备及其在印染废水处理中的应用", 《化工环保》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116351855A (en) * | 2023-05-17 | 2023-06-30 | 江苏集萃功能材料研究所有限公司 | Method for recycling red mud solid waste by crystal modification coupling mineralization technology |
| CN116351855B (en) * | 2023-05-17 | 2023-08-15 | 江苏集萃功能材料研究所有限公司 | Method for recycling red mud solid waste by crystal modification coupling mineralization technology |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160413 |
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| RJ01 | Rejection of invention patent application after publication |