CN103406345A - Comprehensive utilization process of wastewater and waste residues in concrete mixing station - Google Patents
Comprehensive utilization process of wastewater and waste residues in concrete mixing station Download PDFInfo
- Publication number
- CN103406345A CN103406345A CN2013103857568A CN201310385756A CN103406345A CN 103406345 A CN103406345 A CN 103406345A CN 2013103857568 A CN2013103857568 A CN 2013103857568A CN 201310385756 A CN201310385756 A CN 201310385756A CN 103406345 A CN103406345 A CN 103406345A
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- concrete
- water
- slurry
- comprehensive utilization
- pulp
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- 239000004567 concrete Substances 0.000 title claims abstract description 57
- 238000002156 mixing Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000002351 wastewater Substances 0.000 title claims abstract description 13
- 239000002699 waste material Substances 0.000 title abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000004568 cement Substances 0.000 claims abstract description 32
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000011268 mixed slurry Substances 0.000 claims abstract description 8
- 238000004062 sedimentation Methods 0.000 claims description 16
- 230000008676 import Effects 0.000 claims description 6
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000002002 slurry Substances 0.000 abstract description 11
- 239000004576 sand Substances 0.000 abstract description 10
- 239000010865 sewage Substances 0.000 abstract description 10
- 239000004575 stone Substances 0.000 abstract description 6
- 238000004140 cleaning Methods 0.000 abstract description 5
- 230000003750 conditioning effect Effects 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 description 7
- 239000003651 drinking water Substances 0.000 description 6
- 235000020188 drinking water Nutrition 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000001556 precipitation Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000011083 cement mortar Substances 0.000 description 3
- 230000003203 everyday effect Effects 0.000 description 3
- 239000011513 prestressed concrete Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Landscapes
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Processing Of Solid Wastes (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a comprehensive utilization process of wastewater and waste residues in a concrete mixing station. The method comprises the following steps: step 1, washing waste concrete through circulating water to obtain mixed slurry; step 2, introducing the mixed slurry into a stirring separator to be fully washed to obtain separate cement slurry and sand, introducing the cement slurry into a stock trough through a slurry guide groove, and dropping the sand into a material tank through a discharge opening; and step 3, mixing concrete with cement slurry, wherein the cement slurry obtained in the step 2 is introduced into the stock trough through the slurry guide groove after passing by a conditioning pool. The comprehensive utilization process disclosed by the invention can be used for not only full-automatically separating and cleaning sand, stone and slurry in the waste concrete of an agitating lorry at one time, but also ensuring the sand, the stone and the slurry to be recycled, and sewage is settled by a three-level settling pond and is pumped into a machine to be recycled, so that the zero emission of the sewage is completely realized, which both saves resources and protects the environment. The slurry is used for mixing the concrete to completely use the recycled slurry, so that real zero emission of three-wastes of the concrete mixing station is realized.
Description
Technical field
The invention belongs to construction material recovery process technical field, relate to a kind of waste water and dregs of concrete mixing station comprehensive utilization process.
Background technology
Most important material in civil construction project during concrete.Along with the expanding day of construction scale, reinforced concrete structure becomes the building structure main body, makes the production of commerical ready-mixed concrete be rapidly developed.According to statistics, build together into 683 of mixing plants to the whole nation in 1999, design year production capacity 12700 ten thousand steres, actual production has surpassed 15400 ten thousand steres.A large amount of concrete production like this; slurry treatment problem after concrete equipment cleans just becomes a major issue of puzzlement concrete mixing plant: brushing apparatus needs a large amount of water on the one hand; be exactly the processing of slime water after cleaning on the other hand; in today that water resource growing tension, environmental protection more and more come into one's own, it is especially outstanding that this problem just seems.
Concrete mixing plant all needs to rinse mixer, transport vehicle every day, in the pulp-water after flushing device, contains cement mortar, aggregate and the impurity of bringing into, additive etc., and because these pulp-waters have strong basicity, pH value can reach 12 left and right, and arbitrarily discharge pollutes the environment; Rinse in addition a transport vehicle and need 1～2 ton of water, will rinse every day 2～3 times, the medium scale mixing plant of Yi Yijia is used 20 trucd mixers to be example every day, and one day will water 40～120 tons, is also a very large waste so use clear water to rinse transport vehicle.
Summary of the invention
Technical problem to be solved by this invention just is to provide a kind of waste water and dregs of concrete mixing station comprehensive utilization process, can thoroughly solve the discarded concrete pollution problem, and can economize on resources.Not only can be by the sand in the discarded concrete in trucd mixer, stone, the disposable full-automatic separation cleaning of pulp-water; and guarantee that sand, stone, water recycle; sewage is by three grades of sedimentation basins; after precipitation, in the suction machine, recycle again; thoroughly realized the zero-emission of sewage; both save resource, protected again environment.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: a kind of waste water and dregs of concrete mixing station comprehensive utilization process comprises the following steps:
Step 1: use the circulating water flushing discarded concrete, obtain mixed slurry;
Step 2: mixed slurry is imported to the stirring seperator and fully clean, the cement pulp-water and the sandstone that obtain separating, the cement pulp-water imports stock tank through leading stock tank, and sandstone falls into the material pond through discharging opening;
Step 3: the cement pulp-water is used for mixing and stirring concrete.
When pulp-water concentration is less than or equal to the 4%(mass fraction) time, not remarkable on the impact of the concrete slump, 7 days and 28 days intensity; But when pulp-water concentration reaches the 6%(mass fraction) time, concrete slump is die-offed, and has a strong impact on concrete workability, for improving its workability, two kinds of methods is arranged: the one, and the volume of increase additive; The 2nd, the cement that the solid constituent in pulp-water is replaced to flyash and increase one half quantity guarantees the slump and intensity, but two kinds of methods have all increased the cost of material of formula.If pulp-water concentration is controlled at the 4%(mass fraction) with in interior situation, just can on producing, all consume, do not need to adopt said method to carry out the match ratio adjustment.Use 4%(mass fraction) pulp-water of concentration mixes and stirs concrete and can consume the recovery pulp-water fully, and concrete mixing plant is realized " three wastes " real zero-emission.
Preferably, the cement pulp-water that in step 2, separation obtains, behind modified pond, imports stock tank through leading stock tank.Because the cement mortar glassware for drinking water of concrete mixing plant has strong basicity, pH value can reach 12 left and right, arbitrarily discharge pollutes the environment, and after separation, first through modified pond, the pH value of cement pulp-water is suitably lowered, and then is diluted and reclaim be used to mixing and stirring concrete, even pulp-water concentration reaches the 6%(mass fraction) time, because pH value is lower, it is dry and astringent that the glue sand after stirring can not become, the mobility still had, be not easy to condense, also can not affect concrete durability index.With the 6%(mass fraction after modified) pulp-water of concentration and the contrast test that drinking water has been made cement setting time.While using drinking water, the presetting period is 2 hours 25 minutes; Final setting time is 3 hours 35 minutes; And use the 6%(mass fraction after modified) during the concentration pulp-water, the presetting period is 2 hours 50 minutes; Final setting time is 4 hours 02 minute.Setting time, poor being respectively 25 minutes, 27 minutes, all met the poor requirement that is less than 30 minutes setting time.Namely through modified pond, carry out after modified the cement pulp-water obtained, do not need to control pulp-water concentration at the 4%(mass fraction) below, also meet and well below the most sternly requiring in standard (water quality requirement of prestressed concrete).This cement pulp-water mixes and stirs concrete also can consume the recovery pulp-water fully, and concrete mixing plant is realized " three wastes " real zero-emission.
Preferably, in modified pond, with acid, the pH value of cement pulp-water is adjusted to 8～10.
Preferably, the stirring seperator in step 2 is connected with sedimentation basin.
Preferably, sedimentation basin comprises one-level sedimentation basin, second-level settling pond and three grades of sedimentation basins.Sewage, by three grades of sedimentation basins, recycles in the suction machine after precipitation again, has thoroughly realized the zero-emission of sewage, has both saved resource, has protected again environment.
Compared with prior art; advantage of the present invention is: solved discarded concrete generation waste water and dregs and caused environmental pollution; the waste resource; the cleaning discarded concrete needs the problems such as a large amount of human and material resources, financial resources; the present invention not only can be by the sand in the discarded concrete in trucd mixer, stone, the disposable full-automatic separation cleaning of pulp-water; and guarantee that sand, stone, water recycle; sewage is by three grades of sedimentation basins; after precipitation, in the suction machine, recycle again; thoroughly realized the zero-emission of sewage; both save resource, protected again environment.After separation, first through modified pond, the pH value of cement pulp-water is suitably lowered, and then dilute and reclaim be used to mixing and stirring concrete, even pulp-water concentration reaches the 6%(mass fraction) time, also meet and well below the most sternly requiring in standard (water quality requirement of prestressed concrete).This cement pulp-water mixes and stirs concrete also can consume the recovery pulp-water fully, and concrete mixing plant is realized " three wastes " real zero-emission.
The invention will be further described below in conjunction with the specific embodiment:
The specific embodiment
A kind of waste water and dregs of concrete mixing station comprehensive utilization process of the present invention embodiment 1 comprises the following steps:
Step 1: use the circulating water flushing discarded concrete, obtain mixed slurry;
Step 2: mixed slurry is imported to the stirring seperator and fully clean, the cement pulp-water and the sandstone that obtain separating, the cement pulp-water imports stock tank through leading stock tank, and sandstone falls into the material pond through discharging opening;
Step 3: the cement pulp-water is used for mixing and stirring concrete.
Generally, when pulp-water concentration is less than or equal to the 4%(mass fraction) time, not remarkable on the impact of the concrete slump, 7 days and 28 days intensity; But when pulp-water concentration reaches the 6%(mass fraction) time, concrete slump is die-offed, and has a strong impact on concrete workability, for improving its workability, two kinds of methods is arranged: the one, and the volume of increase additive; The 2nd, the cement that the solid constituent in pulp-water is replaced to flyash and increase one half quantity guarantees the slump and intensity, but two kinds of methods have all increased the cost of material of formula.If pulp-water concentration is controlled at the 4%(mass fraction) with in interior situation, just can on producing, all consume, do not need to adopt said method to carry out the match ratio adjustment.Use 4%(mass fraction) pulp-water of concentration mixes and stirs concrete and can consume the recovery pulp-water fully, and concrete mixing plant is realized " three wastes " real zero-emission.
The cement pulp-water that in step 2, separation obtains, behind modified pond, imports stock tank through leading stock tank.
In modified pond, with acid, the pH value of cement pulp-water is adjusted to 8～10.
Because the cement mortar glassware for drinking water of concrete mixing plant has strong basicity, pH value can reach 12 left and right, arbitrarily discharge pollutes the environment, and after separation, first through modified pond, the pH value of cement pulp-water is suitably lowered, and then is diluted and reclaim be used to mixing and stirring concrete, even pulp-water concentration reaches the 6%(mass fraction) time, because pH value is lower, it is dry and astringent that the glue sand after stirring can not become, the mobility still had, be not easy to condense, also can not affect concrete durability index.With the 6%(mass fraction after modified) pulp-water of concentration and the contrast test that drinking water has been made cement setting time.While using drinking water, the presetting period is 2 hours 25 minutes; Final setting time is 3 hours 35 minutes; And use the 6%(mass fraction after modified) during the concentration pulp-water, the presetting period is 2 hours 50 minutes; Final setting time is 4 hours 02 minute.Setting time, poor being respectively 25 minutes, 27 minutes, all met the poor requirement that is less than 30 minutes setting time.Namely through modified pond, carry out after modified the cement pulp-water obtained, do not need to control pulp-water concentration at the 4%(mass fraction) below, also meet and well below the most sternly requiring in standard (water quality requirement of prestressed concrete).This cement pulp-water mixes and stirs concrete also can consume the recovery pulp-water fully, and concrete mixing plant is realized " three wastes " real zero-emission.So just do not need to be subject to the concentration limit of cement pulp-water, can fine assurance realize " three wastes " real zero-emission.
Stirring seperator in step 2 is connected with sedimentation basin.
Sedimentation basin comprises one-level sedimentation basin, second-level settling pond and three grades of sedimentation basins.
Sewage, by three grades of sedimentation basins, recycles in the suction machine after precipitation again, has thoroughly realized the zero-emission of sewage, has both saved resource, has protected again environment.
The foregoing is only specific embodiments of the invention, but technical characterictic of the present invention is not limited to this, any those skilled in the art is in the field of the invention, and the variation of doing or modification all are encompassed among the scope of the claims of the present invention.
Claims (5)
1. waste water and dregs of concrete mixing station comprehensive utilization process is characterized in that: comprise the following steps:
Step 1: use the circulating water flushing discarded concrete, obtain mixed slurry;
Step 2: mixed slurry is imported to the stirring seperator and fully clean, the cement pulp-water and the sandstone that obtain separating, the cement pulp-water imports stock tank through leading stock tank, and sandstone falls into the material pond through discharging opening;
Step 3: the cement pulp-water is used for mixing and stirring concrete.
2. waste water and dregs of concrete mixing station comprehensive utilization process as claimed in claim 1 is characterized in that: in step 2, separate the cement pulp-water that obtains behind modified pond, import stock tank through leading stock tank.
3. waste water and dregs of concrete mixing station comprehensive utilization process as claimed in claim 2, is characterized in that: with acid, the pH value of cement pulp-water is adjusted to 8～10 in modified pond.
4. waste water and dregs of concrete mixing station comprehensive utilization process as claimed in claim 1, it is characterized in that: the stirring seperator in step 2 is connected with sedimentation basin.
5. waste water and dregs of concrete mixing station comprehensive utilization process as claimed in claim 4, it is characterized in that: sedimentation basin comprises one-level sedimentation basin, second-level settling pond and three grades of sedimentation basins.
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| CN2013103857568A CN103406345A (en) | 2013-08-29 | 2013-08-29 | Comprehensive utilization process of wastewater and waste residues in concrete mixing station |
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| CN2013103857568A CN103406345A (en) | 2013-08-29 | 2013-08-29 | Comprehensive utilization process of wastewater and waste residues in concrete mixing station |
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| CN103406345A true CN103406345A (en) | 2013-11-27 |
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| CN2013103857568A Pending CN103406345A (en) | 2013-08-29 | 2013-08-29 | Comprehensive utilization process of wastewater and waste residues in concrete mixing station |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141498A (en) * | 2014-06-05 | 2014-11-12 | 长安大学 | High-performance construction device for spraying concrete with wet method and construction method of construction device |
| CN104628283A (en) * | 2015-02-09 | 2015-05-20 | 湖南中建五局混凝土有限公司 | Concrete retarder prepared by utilizing waste water of mixing plant and blackstrap of sugar refinery as well as preparation method and use method of concrete retarder |
| CN104944851A (en) * | 2015-05-25 | 2015-09-30 | 上海城建物资有限公司 | Technology for producing concrete from wastewater |
| CN105330237A (en) * | 2015-11-09 | 2016-02-17 | 同济大学 | Baking-free brick produced from waste residues of concrete batching plant and preparation method thereof |
| CN105502985A (en) * | 2016-01-05 | 2016-04-20 | 鄂尔多斯市世正工贸有限公司 | Commercial concrete waste recycling system |
| CN106277882A (en) * | 2016-08-09 | 2017-01-04 | 魏元聪 | A kind of production technology of New Regenerated environmental protection breeze flyash |
| CN106365484A (en) * | 2016-08-18 | 2017-02-01 | 上海二十冶建设有限公司 | Waste commodity concrete recovery and recycling technology |
| CN109433579A (en) * | 2018-11-12 | 2019-03-08 | 长沙万荣粉体设备科技有限公司 | A kind of fixed-end forces equipment |
| CN110538514A (en) * | 2019-09-29 | 2019-12-06 | 东宸环保装备制造有限公司 | Resource recovery detecting system based on sewage and slurry separation treatment |
| CN110568142A (en) * | 2019-09-25 | 2019-12-13 | 成都精准混凝土有限公司 | Detection process of concrete wastewater |
| CN110627259A (en) * | 2019-10-25 | 2019-12-31 | 中国矿业大学 | A purification method for washing sewage of concrete mixer truck |
| CN110862241A (en) * | 2019-11-29 | 2020-03-06 | 湖北工业大学 | Process and equipment suitable for disposal of waste residue in mixing plant |
| CN112624649A (en) * | 2020-12-31 | 2021-04-09 | 徐州经济技术开发区诚意商品混凝土有限公司 | Ultrasonic shelling and regenerating gelation utilization method for concrete tank car cleaning waste residue |
| CN112756085A (en) * | 2020-12-31 | 2021-05-07 | 徐州经济技术开发区诚意商品混凝土有限公司 | Method for recycling cleaning waste liquid of concrete tank truck |
| CN113321282A (en) * | 2021-06-18 | 2021-08-31 | 杭州三中新型建材科技有限公司 | Concrete mixing plant water circulation system and water treatment method thereof |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104141498A (en) * | 2014-06-05 | 2014-11-12 | 长安大学 | High-performance construction device for spraying concrete with wet method and construction method of construction device |
| CN104628283B (en) * | 2015-02-09 | 2016-07-06 | 中建西部建设湖南有限公司 | A kind of concrete retarder utilizing mixing plant waste water and waste molasses of sugar plant to prepare, preparation method and using method |
| CN104628283A (en) * | 2015-02-09 | 2015-05-20 | 湖南中建五局混凝土有限公司 | Concrete retarder prepared by utilizing waste water of mixing plant and blackstrap of sugar refinery as well as preparation method and use method of concrete retarder |
| CN104944851A (en) * | 2015-05-25 | 2015-09-30 | 上海城建物资有限公司 | Technology for producing concrete from wastewater |
| CN105330237A (en) * | 2015-11-09 | 2016-02-17 | 同济大学 | Baking-free brick produced from waste residues of concrete batching plant and preparation method thereof |
| CN105502985B (en) * | 2016-01-05 | 2018-05-18 | 鄂尔多斯市世正工贸有限公司 | Business's concrete gives up clout recycling system |
| CN105502985A (en) * | 2016-01-05 | 2016-04-20 | 鄂尔多斯市世正工贸有限公司 | Commercial concrete waste recycling system |
| CN106277882A (en) * | 2016-08-09 | 2017-01-04 | 魏元聪 | A kind of production technology of New Regenerated environmental protection breeze flyash |
| CN106365484A (en) * | 2016-08-18 | 2017-02-01 | 上海二十冶建设有限公司 | Waste commodity concrete recovery and recycling technology |
| CN109433579A (en) * | 2018-11-12 | 2019-03-08 | 长沙万荣粉体设备科技有限公司 | A kind of fixed-end forces equipment |
| CN110568142A (en) * | 2019-09-25 | 2019-12-13 | 成都精准混凝土有限公司 | Detection process of concrete wastewater |
| CN110538514A (en) * | 2019-09-29 | 2019-12-06 | 东宸环保装备制造有限公司 | Resource recovery detecting system based on sewage and slurry separation treatment |
| CN110627259A (en) * | 2019-10-25 | 2019-12-31 | 中国矿业大学 | A purification method for washing sewage of concrete mixer truck |
| CN110862241A (en) * | 2019-11-29 | 2020-03-06 | 湖北工业大学 | Process and equipment suitable for disposal of waste residue in mixing plant |
| CN110862241B (en) * | 2019-11-29 | 2022-01-25 | 湖北工业大学 | Process and equipment suitable for treating waste residues in mixing plant |
| CN112624649A (en) * | 2020-12-31 | 2021-04-09 | 徐州经济技术开发区诚意商品混凝土有限公司 | Ultrasonic shelling and regenerating gelation utilization method for concrete tank car cleaning waste residue |
| CN112756085A (en) * | 2020-12-31 | 2021-05-07 | 徐州经济技术开发区诚意商品混凝土有限公司 | Method for recycling cleaning waste liquid of concrete tank truck |
| CN113321282A (en) * | 2021-06-18 | 2021-08-31 | 杭州三中新型建材科技有限公司 | Concrete mixing plant water circulation system and water treatment method thereof |
| CN113321282B (en) * | 2021-06-18 | 2022-05-17 | 杭州三中新型建材科技有限公司 | Concrete mixing plant water circulation system and water treatment method thereof |
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Application publication date: 20131127 |