CN113232157A - Waste slurry recycling process and device for mixing plant - Google Patents
Waste slurry recycling process and device for mixing plant Download PDFInfo
- Publication number
- CN113232157A CN113232157A CN202110620777.8A CN202110620777A CN113232157A CN 113232157 A CN113232157 A CN 113232157A CN 202110620777 A CN202110620777 A CN 202110620777A CN 113232157 A CN113232157 A CN 113232157A
- Authority
- CN
- China
- Prior art keywords
- waste slurry
- desliming
- waste
- water
- mixing plant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002699 waste material Substances 0.000 title claims abstract description 178
- 239000002002 slurry Substances 0.000 title claims abstract description 165
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000002156 mixing Methods 0.000 title claims abstract description 40
- 230000008569 process Effects 0.000 title claims abstract description 36
- 238000004064 recycling Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 239000007787 solid Substances 0.000 claims abstract description 40
- 239000002562 thickening agent Substances 0.000 claims abstract description 32
- 238000012216 screening Methods 0.000 claims abstract description 15
- 238000003860 storage Methods 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims description 28
- 239000002245 particle Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 238000004062 sedimentation Methods 0.000 claims description 8
- 229920002401 polyacrylamide Polymers 0.000 claims description 7
- 229910021578 Iron(III) chloride Inorganic materials 0.000 claims description 2
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000010908 plant waste Substances 0.000 claims 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims 2
- 239000004567 concrete Substances 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 4
- 239000002910 solid waste Substances 0.000 abstract description 4
- 239000002893 slag Substances 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract 2
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000004575 stone Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 16
- 230000000694 effects Effects 0.000 description 9
- 238000005086 pumping Methods 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000007569 slipcasting Methods 0.000 description 4
- 238000000967 suction filtration Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a waste slurry recycling process and a waste slurry recycling device for a mixing plant. The process comprises the following steps: s1, separating; s2, concentrating; s3, vacuum desliming; the device comprises a screening device, a thickener, a waste slurry storage tank, a desliming machine and a clean water tank which are sequentially communicated. The invention can treat and recycle the waste slurry water of the mixing plant, the waste slurry water of the mixing plant is treated by sand-stone separation equipment and then enters a thickener for water-slurry quick separation, the overflow clear water can be directly used for cleaning concrete production, equipment and sites, the waste slurry with high concentration at the bottom enters high-efficiency desliming equipment for water-solid separation, the separated solid slag is loose and scattered and is directly reused for production, and the separated water is directly used for cleaning production or equipment and sites. The method has the characteristics of efficient and high-value treatment of the solid waste of the mixing plant, and has the advantages of low treatment cost, zero emission of the solid waste, complete recycling, intelligent monitoring and control, environmental friendliness and the like.
Description
Technical Field
The invention belongs to the technical field of concrete admixture production, and particularly relates to a waste slurry recycling process and device for a mixing plant.
Background
The urban construction has great demand on building materials such as concrete, and a stirring station can generate a large amount of waste slurry water in the process of producing concrete, wherein the waste slurry water mainly comes from washing stirring trucks, pump trucks, conveying belts, stirrers, fields and the like, so that the waste slurry water contains aggregate, cement, fly ash, mineral powder, a small amount of mud and the like, and can be used as a concrete production raw material. However, the solid content is generally low and unstable, the method is directly used for concrete production, the reduction is limited, the production mix proportion needs to be continuously adjusted, and a lot of inconvenience is brought to the production management of a concrete mixing plant.
At present, main disposal methods of the waste slurry water of the mixing plant comprise a precipitation filter-pressing method, a homogenization method and the like, the disposal methods are provided with a sedimentation tank, the sedimentation tank is required to be cleared up regularly, the production management is inconvenient while the occupied area is large, simultaneously, mud cakes generated after the precipitation filter-pressing method is directly transported and disposed, the disposal cost is high, the situations of supplementing clear water and the like can be met in the disposal process of the homogenization method, the reduction disposal of the waste slurry water is not favorable, the homogenized waste slurry is directly used for concrete production, the mixing amount is difficult to accurately control, and the quality of the concrete is unstable.
Although the existing mixing station waste slurry water treatment process and equipment in China can also primarily treat the mixing station waste slurry water, the existing mixing station waste slurry water treatment process and equipment have substantial defects, such as: the waste slurry disposal device can not release a large amount of clear water, and is not beneficial to the reduction of the waste slurry of the mixing plant.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a waste slurry recycling process and a waste slurry recycling device for a mixing plant, which can realize zero solid waste discharge of the mixing plant and realize the purpose of green production in the industry of the mixing plant.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:
a recycling process of waste slurry of a mixing plant comprises the following steps:
s1, separating
Separating particles with the particle size larger than 2mm in the waste slurry generated by the stirring station to obtain residual waste slurry;
s2, concentrating
Concentrating the residual waste slurry in the step S1 to obtain overflow liquid and underflow waste slurry, wherein the overflow liquid is reused for production;
s3, vacuum desliming
And (5) desliming the underflow waste slurry in the step S2 to obtain waste residues and desliming waste slurry, and returning the desliming waste slurry to the step S2 for continuous concentration.
Furthermore, in the vacuum desliming, the vacuum degree is kept at 0.04-0.08 MPa, the vacuum degree is controlled, the loose degree of the desliming waste residue can be controlled, and the vacuum desliming waste residue can directly enter a main stirring machine for concrete production and can be easily and uniformly dispersed under the stirring action.
Further, in the concentration process, the waste slurry entering the concentrator has enough residence time, the residence time is not less than 60min, preferably 60-90 min, and more preferably 90 min; the solid content of the overflow liquid is less than 0.02%, the solid content of the bottom waste slurry is more than 20% after sedimentation, and the retention time is ensured to give a certain sedimentation time, so that the solid content of the bottom waste slurry in the thickener is improved.
Furthermore, the solid content of the waste slurry after vacuum desliming is less than 1%, the solid content of the waste residue after desliming is more than 70%, the solid content of the deslimed waste slurry is very high, the reduction significance of the waste slurry is obvious, and the deslimed waste slurry water has no visible solid to naked eyes and is in a clear water state.
Furthermore, a settling agent is required to be added in the concentration process, and the using amount of the settling agent is 0.01-0.02% of the volume of the waste slurry; the settling agent mainly comprises one or more of polymeric aluminum ferric chloride, polymeric ferric sulfate, polymeric aluminum sulfate, polysilicate and polyacrylamide, and the addition of the settling agent can obviously improve the settling efficiency and shorten the settling time, and meanwhile, the dosage of the settling agent is little, and the settling agent has no adverse effect on concrete.
Further, the sedimentation agent is preferably formed by mixing aluminum polysilicate and polyacrylamide in a ratio of 1: 1.
The application also designs a device matched with the waste slurry recycling process of the mixing plant, which comprises a screening device, a thickener, a waste slurry storage tank, a desliming machine and a clean water tank which are sequentially communicated;
the concentrator bottom is hourglass hopper-shaped, and open on the upper portion has the overflow launder, and open at the middle part has the slip casting mouth, and slip casting mouth department is provided with the slip casting chamber, and the muddy useless thick liquid that the slip casting chamber can avoid injecting mixes and unable overflow clear water with the clear water of excessive flow.
Further, the anti-blocking device comprises a second motor arranged on the outer wall of the discharge port pipeline; a second rotating shaft connected with a second motor is arranged in the pipeline; the second rotating shaft is provided with a first stirring blade and a second stirring blade which have opposite spiral directions.
Furthermore, a valve is arranged below the anti-blocking device, and preferably the valve is an electric valve.
Furthermore, the grouting opening can be communicated with the grouting cavity through a pipeline and can also be directly arranged above the grouting cavity.
Furthermore, the top of the thickener is also provided with a stirring device which comprises a first motor arranged at the top of the thickener, and a first rotating shaft which extends to the discharge hole and is connected with the first motor is arranged in the thickener; the first rotating shaft is connected with a scraper or a scraper through a connecting plate, and the scraper or the scraper can remove slurry adhered to the inner wall of the aggregate cavity through rotation.
Further, a discharge hole of the screening equipment is communicated with a grouting hole of the thickener; the bottom of the thickener is communicated with a waste pulp storage tank through a pump; the waste slurry storage tank is connected with the desliming machine through a pump machine; the drainage end of the desliming machine and the overflow port of the thickener are respectively communicated with the clean water tank.
Furthermore, the thickener and the waste slurry storage tank are provided with a liquid level meter, a flow monitor, a drop-in ultrasonic concentration meter, an industrial pH meter and a stirring device.
Furthermore, a flow monitor, a solid content monitor and a pH monitor are arranged at a slurry injection port, an overflow port, a discharge port and a desliming waste slurry outlet of the thickener.
Furthermore, the flow monitor adopts one or more of a differential pressure type flowmeter, a positive displacement flowmeter and an electromagnetic flowmeter for monitoring.
Furthermore, the solid content monitor adopts an input type ultrasonic concentration meter for monitoring, and concentration detection can provide data basis for judging the concentration effect.
Further, the pH monitor is monitored by an industrial online pH meter, provides process data for people, and judges the change and the characteristics of the waste slurry.
Further, an overflow port and a discharge port of the thickener are both provided with electric valves; the electric valve and the control system are connected through a conventional electric connection mode. Through setting up the motorised valve, the velocity of flow and the flow of overflow clear liquid, underflow waste pulp that produce carry out remote control through configuration motorised valve, through adjustable concentration parameter of control flap, and then online adjustment concentration effect.
Further, the control system is an STM32F103 single chip microcomputer control system.
The invention has the beneficial effects that:
1. the invention has the characteristics of high efficiency and zero emission, is different from the traditional method for constructing a sedimentation tank to homogenize and treat waste slurry, utilizes a thickener and a chemical sedimentation principle to release a large amount of clear water, and simultaneously can obviously improve the solid content of the lower layer of waste slurry and obviously reduce the waste slurry. Meanwhile, the deslimed waste residues are loose and porous and can be directly recycled for concrete production, 100% recycling of the waste slurry water of the mixing plant is realized, zero waste discharge of the mixing plant is realized, and green production is realized.
2. The invention has the characteristics of high efficiency, energy saving and equipment loss reduction, obviously improves the solid content of the waste slurry through physical and chemical concentration, utilizes the vacuum suction filtration equipment for further dehydration, realizes deep solid-waste separation, can also obviously reduce the work load of the vacuum suction filtration equipment, reduces the loss of rear-end equipment, reduces the work time of the vacuum suction filtration equipment and reduces the energy consumption.
3. The invention also has the characteristic of high added value, the invention releases a large amount of clear water in the concentration link, can greatly increase the supply of clear water resources, achieves the water balance and reduces the water consumption cost, and meanwhile, the fine materials after vacuum suction filtration are loose and porous, can directly replace part of raw materials for use, and achieves the purpose of reducing the production cost.
Drawings
FIG. 1 is a schematic structural view of the apparatus;
FIG. 2 is a schematic view of a thickener;
fig. 3 is a schematic structural diagram of the anti-blocking device.
Wherein, 1, a screening device; 2. a thickener; 201. a material collecting cavity; 202. an overflow port; 203. a grouting port; 204. a grouting cavity; 205. an anti-blocking device; 206. a connecting plate; 207. a squeegee; 208. a valve; 209. a first motor; 210. a discharge port; 211. a second motor; 212. a second rotating shaft; 213. a first stirring blade; 214. a second stirring blade; 3. a pump machine; 4. a waste slurry storage tank; 5. a desliming machine; 6. a clean water tank.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1, the waste slurry recycling device of the mixing plant comprises a screening device 1, a pump 3, a thickener 2, a waste slurry storage tank 4, a desliming machine 5 and a clean water tank 6; wherein, the discharge hole of the screening device 1 is communicated with the grouting hole of the thickener 2; the bottom of the thickener 2 is communicated with a waste pulp storage tank 4 through a pump 3; the waste slurry storage tank 4 is connected with the deslimer 5 through the pump machine 3; the drainage end of the deslimer 5 and the overflow port 202 of the thickener 2 are respectively communicated with the clean water tank 6.
As shown in fig. 2, the top of the thickener 2 is provided with a grouting opening 203, and a grouting chamber 204 communicated with the grouting opening 203 is arranged at the top of the thickener 2, so as to ensure that slurry entering from the grouting opening 203 enters the thickener 2 through the grouting chamber 204. In addition, the upper end of one side of the thickener 2 is provided with an overflow port 202, and the bottom end of the grouting cavity 204 is 30-50 cm lower than the lower end of the overflow port 202, so that overflow liquid flowing out of the overflow port 202 is prevented from becoming turbid.
As shown in fig. 2, a first motor 209 is disposed at the top of the thickener 2, a first rotating shaft is connected to the first motor 209, an end of the first rotating shaft extends to a discharge port 210 of the collecting chamber 201, meanwhile, a scraper 207 is connected to the first rotating shaft through a connecting plate 206, and the scraper 207 can remove slurry adhered to the inner wall of the collecting chamber 201 through rotation. The first rotating shaft can be positioned in the grouting cavity 203 or outside the grouting cavity 203.
As shown in fig. 3, the anti-blocking device 205 includes a first motor 211 disposed on the outer wall of the discharge port 210; a second rotating shaft 212 connected with the second motor 211 is arranged in the pipeline; the second rotating shaft 212 is provided with a first stirring blade 213 and a second stirring blade 214 with opposite spiral directions.
The first motor 209 and the second motor 211 are connected to the control system in a conventional electrical connection. Under the cooperation of the first motor 209, the second motor 211 and the second rotating shaft 212, the possibility of blockage of the device can be reduced as much as possible. Moreover, the first stirring blade 213 and the second stirring blade 214 with opposite spiral directions can also avoid the blocking of the slurry which may occur when the slurry is stirred in the same direction.
The concentrator 2 is also provided with a liquid level detection device, the liquid level detection device adopts one or more of an ultrasonic liquid level meter, a magnetic turning plate liquid level meter, a magnetic float liquid level meter, an internal floating type liquid level meter and a drop-in type liquid level meter, and the liquid level meter can detect process data so as to be convenient for better maintenance, overhaul and the like.
A flow monitor, a solid content monitor and a pH monitor (not shown in the figure) are also arranged at the grouting port, the overflow port 202 and the discharge port 210 of the thickener 2 and the slurry outlet of the deslimed waste slurry; the flow monitor adopts one or more of differential pressure type, volumetric flow meter and electromagnetic flow meter for monitoring.
The solid content monitor is monitored by an input type ultrasonic concentration meter, and concentration detection can provide data basis for judging the concentration effect.
The pH monitor is monitored by an industrial online pH meter, provides process data for people and judges the change and the characteristics of waste slurry.
In addition, the overflow port 202 and the discharge port 210 of the thickener 2 are both provided with electric valves, and the electric valves are connected with a control system in a conventional electric connection mode, so that the concentration parameters can be adjusted through the control valves, and the concentration effect can be adjusted on line.
Example 1
A recycling process of waste slurry of a mixing plant comprises the following steps:
s1, separating
Separating particles with the particle size larger than 2mm in the waste slurry water generated by the stirring station by adopting screening equipment to obtain residual waste slurry;
s2, concentrating
Adding aluminum polysilicate accounting for 0.01 percent of the volume of the waste slurry obtained in the step S1 into the waste slurry, and concentrating the waste slurry in a concentrator for 60 min; respectively obtaining clear water with solid content less than 0.1 percent and underflow waste slurry with solid content more than 20 percent;
s3, vacuum desliming
And (4) pumping the underflow waste slurry obtained in the step (S2) into a desliming machine, desliming in an environment of 0.04MPa, collecting the obtained waste residues and desliming waste slurry, and returning the desliming waste slurry to the step (S2) for continuous concentration.
Example 2
A recycling process of waste slurry of a mixing plant comprises the following steps:
s1, separating
Separating particles with the particle size larger than 2mm in the waste slurry water generated by the stirring station by adopting screening equipment to obtain residual waste slurry;
s2, concentrating
Adding aluminum polysilicate accounting for 0.01 percent of the volume of the waste slurry obtained in the step S1 into the waste slurry, and concentrating the waste slurry in a concentrator for 60 min; respectively obtaining clear water with solid content less than 0.1 percent and underflow waste slurry with solid content more than 20 percent;
s3, vacuum desliming
And (4) pumping the underflow waste slurry obtained in the step (S2) into a desliming machine, desliming in an environment of 0.05MPa, collecting the obtained waste residues and desliming waste slurry, and returning the desliming waste slurry to the step (S2) for continuous concentration.
Example 3
A recycling process of waste slurry of a mixing plant comprises the following steps:
s1, separating
Separating particles with the particle size larger than 2mm in the waste slurry water generated by the stirring station by adopting screening equipment to obtain residual waste slurry;
s2, concentrating
Adding aluminum polysilicate accounting for 0.01 percent of the volume of the waste slurry obtained in the step S1 into the waste slurry, and concentrating the waste slurry in a concentrator for 60 min; respectively obtaining clear water with solid content less than 0.1 percent and underflow waste slurry with solid content more than 20 percent;
s3, vacuum desliming
And (4) pumping the underflow waste slurry obtained in the step (S2) into a desliming machine, desliming in an environment of 0.06MPa, collecting the obtained waste residues and desliming waste slurry, and returning the desliming waste slurry to the step (S2) for continuous concentration.
Example 4
A recycling process of waste slurry of a mixing plant comprises the following steps:
s1, separating
Separating particles with the particle size larger than 2mm in the waste slurry water generated by the stirring station by adopting screening equipment to obtain residual waste slurry;
s2, concentrating
Adding aluminum polysilicate accounting for 0.01 percent of the volume of the waste slurry obtained in the step S1 into the waste slurry, and concentrating the waste slurry in a concentrator for 60 min; respectively obtaining clear water with solid content less than 0.1 percent and underflow waste slurry with solid content more than 20 percent;
s3, vacuum desliming
And (4) pumping the underflow waste slurry obtained in the step S2 into a desliming machine, desliming in an environment of 0.07MPa, collecting the obtained waste residues and desliming waste slurry, and returning the desliming waste slurry to the step S2 for continuous concentration.
Example 5
A recycling process of waste slurry of a mixing plant comprises the following steps:
s1, separating
Separating particles with the particle size larger than 2mm in the waste slurry water generated by the stirring station by adopting screening equipment to obtain residual waste slurry;
s2, concentrating
Adding aluminum polysilicate accounting for 0.01 percent of the volume of the waste slurry obtained in the step S1 into the waste slurry, and concentrating the waste slurry in a concentrator for 60 min; respectively obtaining clear water with solid content less than 0.1 percent and underflow waste slurry with solid content more than 20 percent;
s3, vacuum desliming
And (4) pumping the underflow waste slurry obtained in the step S2 into a desliming machine, desliming in an environment of 0.08MPa, collecting the obtained waste residues and desliming waste slurry, and returning the desliming waste slurry to the step S2 for continuous concentration.
Example 6
A recycling process of waste slurry of a mixing plant comprises the following steps:
s1, separating
Separating particles with the particle size larger than 2mm in the waste slurry water generated by the stirring station by adopting screening equipment to obtain residual waste slurry;
s2, concentrating
Adding a settling agent accounting for 0.01 percent of the volume of the waste slurry water obtained in the step S1, wherein the settling agent is prepared from 1:1 polyacrylamide: the polysilicate aluminum is used, and the concentration residence time in a concentrator is 70 min; respectively obtaining clear water with solid content less than 0.1 percent and underflow waste slurry with solid content more than 20 percent;
s3, vacuum desliming
And (4) pumping the underflow waste slurry obtained in the step (S2) into a desliming machine, desliming in an environment of 0.06MPa, collecting the obtained waste residues and desliming waste slurry, and returning the desliming waste slurry to the step (S2) for continuous concentration.
Example 7
A recycling process of waste slurry of a mixing plant comprises the following steps:
s1, separating
Separating particles with the particle size larger than 2mm in the waste slurry water generated by the stirring station by adopting screening equipment to obtain residual waste slurry;
s2, concentrating
Adding a settling agent accounting for 0.01 percent of the volume of the waste slurry water obtained in the step S1, wherein the settling agent is prepared from 1:1 polyacrylamide: the polysilicate aluminum is used, and the concentration residence time in a concentrator is 80 min; respectively obtaining clear water with solid content less than 0.1 percent and underflow waste slurry with solid content more than 20 percent;
s3, vacuum desliming
And (4) pumping the underflow waste slurry obtained in the step (S2) into a desliming machine, desliming in an environment of 0.06MPa, collecting the obtained waste residues and desliming waste slurry, and returning the desliming waste slurry to the step (S2) for continuous concentration.
Example 8
A recycling process of waste slurry of a mixing plant comprises the following steps:
s1, separating
Separating particles with the particle size larger than 2mm in the waste slurry water generated by the stirring station by adopting screening equipment to obtain residual waste slurry;
s2, concentrating
Adding a settling agent accounting for 0.01 percent of the volume of the waste slurry water obtained in the step S1, wherein the settling agent is prepared from 1:1 polyacrylamide: the polysilicate aluminum is used for concentrating and staying for 90min in a concentrator; respectively obtaining clear water with solid content less than 0.1 percent and underflow waste slurry with solid content more than 20 percent;
s3, vacuum desliming
And (4) pumping the underflow waste slurry obtained in the step (S2) into a desliming machine, desliming in an environment of 0.06MPa, collecting the obtained waste residues and desliming waste slurry, and returning the desliming waste slurry to the step (S2) for continuous concentration.
Examples of the experiments
1. The results of the tests on the concentration effect of examples 1 to 8 and the desliming effect of examples 1 to 8 and the control group, respectively, were shown in tables 1 and 2, using the unconcentrated waste slurry and then directly subjected to vacuum desliming as the control group.
TABLE 1 concentration Effect
| Examples | Concentration of bottom solids | Solid content of overflow liquid | The proportion of the released clear water in the original waste pulp |
| 1 | 25％ | Clean water | 60％ |
| 2 | 24％ | Clean water | 65％ |
| 3 | 25％ | Clean water | 65％ |
| 4 | 23％ | Clean water | 70％ |
| 5 | 26％ | Clean water | 72％ |
| 6 | 28％ | Clean water | 75％ |
| 7 | 30％ | Clean water | 80％ |
| 8 | 35％ | Clean water | 82％ |
TABLE 2 desliming Effect
| Scheme(s) | Solid content of desliming waste slurry | Solid content of desliming waste residue | The ratio of desliming waste slurry to original waste slurry |
| Comparison group | 1.0％ | 80％ | 95％ |
| Example 1 | 0.2％ | 86％ | 35％ |
| Example 2 | 0.3％ | 88％ | 33％ |
| Example 3 | 0.3％ | 88％ | 32％ |
| Example 4 | 0.2％ | 90％ | 26％ |
| Example 5 | 0.1％ | 91％ | 23％ |
| Example 6 | 0.2％ | 88％ | 22％ |
| Example 7 | 0.2％ | 88％ | 18％ |
| Example 8 | 0.2％ | 89％ | 15％ |
As can be seen from the data of the examples 1 to 5 in the table 2, along with the improvement of the vacuum degree of the vacuum desliming machine and along with the improvement of the vacuum degree of the vacuum desliming machine, the solid content of the desliming waste slurry is not greatly different, the solid content of the waste residue is obviously improved, and the amount of the desliming waste slurry is gradually reduced, which indicates that the improvement of the vacuum degree is beneficial to the reduction of the waste slurry in the mixing plant. The data of examples 6-8 show that the concentration effect is improved with the increase of the concentration residence time.
2. The energy consumption of the control group (the waste slurry which is not concentrated and then directly subjected to vacuum desliming is taken as the control group) and the processes of the embodiments 1 to 8 is detected, and the results are shown in the table 3.
TABLE 3 energy consumption
| Scheme(s) | Working time/(hour/day) | Energy consumption of the process/kw |
| Comparison group | 12.0 | 60 |
| Example 1 | 6.0 | 35 |
| Example 2 | 5.0 | 37 |
| Example 3 | 4.5 | 39 |
| Example 4 | 4.2 | 39 |
| Example 5 | 4.0 | 41 |
| Example 6 | 5.0 | 35 |
| Example 7 | 5.2 | 34 |
| Example 8 | 5.6 | 35 |
As can be seen from the data in Table 3, the desliming energy consumption of the embodiments 1 to 8 is obviously lower than that of direct desliming for concentration, the energy consumption is reduced by more than 30%, the equipment running time is reduced by more than 50%, and the equipment running loss is effectively reduced.
3. The strength of C30 concrete prepared from the blank (C30 concrete without slag) and the slag prepared in examples 1 to 8 was examined, and the results are shown in Table 4.
TABLE 4 concrete Strength
As can be seen from the data of examples 1 to 8 in Table 4, the strength of the C30 concrete prepared by using the desliming waste residues to replace fine aggregates is equivalent to that of the blank group C30 concrete in terms of 7d and 28d, and the strength performance of the concrete is guaranteed.
Claims (10)
1. A recycling process of waste slurry of a mixing plant is characterized by comprising the following steps:
s1, separating
Separating particles with the particle size larger than 2mm in the waste slurry of the stirring station to obtain waste slurry;
s2, concentrating
Adding a settling agent into the waste slurry obtained in the step S1, and concentrating to respectively obtain clear water and underflow waste slurry;
s3, vacuum desliming
And (4) desliming the underflow waste slurry obtained in the step (S2) in an environment of 0.01-0.15 MPa, and collecting the desliming waste residue.
2. The mixing plant waste slurry water recycling process according to claim 1, wherein the residence time of the waste slurry water in the concentration process is 90 min.
3. The process for recycling waste slurry of a mixing plant as claimed in claim 1, wherein the amount of the sedimentation agent is 0.01-0.05% of the volume of the waste slurry.
4. The mixing station waste slurry water recycling process according to claim 1 or 3, wherein the settling agent is at least one of polyaluminum ferric chloride, polyferric sulfate, polyaluminum sulfate, polysilicate and polyacrylamide.
5. The process of claim 4, wherein the settling agent is a mixture of aluminum polysilicate and polyacrylamide in a ratio of 1: 1.
6. The recycling process of the waste slurry of the mixing plant according to claim 1, wherein the vacuum degree of the vacuum desliming is 0.04-0.08 MPa.
7. The mixing plant waste slurry water recycling process according to claim 1, wherein the vacuum desliming process generates desliming waste slurry and waste residues; the solid content of the desliming waste slurry is less than 1 percent, and the step S2 is returned again for concentration; the solid content of the waste residue is more than 70 percent.
8. A stirring station waste slurry water recycling device is characterized by comprising a screening device, a thickener, a waste slurry storage tank, a desliming machine and a clean water tank which are sequentially communicated;
a grouting cavity is formed in the top of the thickener, and a grouting opening communicated with the grouting cavity is formed in the top end of the thickener; a funnel-shaped collecting cavity is arranged below the grouting cavity in the thickener; the discharge gate department that the collection chamber bottom was seted up is provided with prevents stifled device.
9. The mixing station waste slurry recycling device according to claim 8, wherein the anti-blocking device comprises a second motor disposed on the outer wall of the discharge port pipe; a second rotating shaft connected with a second motor is arranged in the pipeline; and a first stirring blade and a second stirring blade which are opposite in spiral direction are arranged on the second rotating shaft.
10. The mixing plant waste slurry water reuse apparatus according to claim 8, wherein the thickener and the waste slurry storage tank are each provided with a level meter, a flow monitor, a drop-in ultrasonic concentration meter, an industrial pH meter, and a stirring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620777.8A CN113232157A (en) | 2021-06-03 | 2021-06-03 | Waste slurry recycling process and device for mixing plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110620777.8A CN113232157A (en) | 2021-06-03 | 2021-06-03 | Waste slurry recycling process and device for mixing plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113232157A true CN113232157A (en) | 2021-08-10 |
Family
ID=77136690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110620777.8A Pending CN113232157A (en) | 2021-06-03 | 2021-06-03 | Waste slurry recycling process and device for mixing plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113232157A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113735239A (en) * | 2021-09-22 | 2021-12-03 | 中建西部建设建材科学研究院有限公司 | Waste slurry settling agent for concrete mixing plant and preparation method and use method thereof |
| CN114393712A (en) * | 2022-01-27 | 2022-04-26 | 广州机觉云物联科技有限公司 | Mixing plant waste slurry recovery processing system |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB444577A (en) * | 1934-09-19 | 1936-03-19 | Int Comb Ltd | Improvements in or relating to coal washing plant |
| CN1579971A (en) * | 2003-08-07 | 2005-02-16 | 上海新型纺纱技术开发中心 | Method and apparatus for concrete waste mortar treatment and reuse |
| KR100817771B1 (en) * | 2007-03-16 | 2008-03-31 | (주)대전산업건기 | Plant for recycling of waste asphalt concrete or waste concrete with grease input device |
| TW200829753A (en) * | 2007-01-12 | 2008-07-16 | Ming-Hum Chen | Method for dredging and treatment of sediments from reservoirs |
| CN203048027U (en) * | 2012-12-07 | 2013-07-10 | 四川顶点建筑工程有限公司 | Anti-blocking type double discharge port spiral conveyer |
| CN105776818A (en) * | 2016-05-03 | 2016-07-20 | 上海幸使环保科技有限公司 | Treatment method and treatment device for treating solid waste with wastewater |
| CN107151034A (en) * | 2017-05-31 | 2017-09-12 | 临汾市华基建材科技有限公司 | A kind of mixing plant sewage water treatment method |
| CN109968538A (en) * | 2019-04-24 | 2019-07-05 | 郑州三和水工机械有限公司 | A kind of concrete mixing plant sewage waste residue recycling system and its equipment |
| CN110357297A (en) * | 2019-07-02 | 2019-10-22 | 马鞍山星奇达新材料科技有限公司 | Water recovery method and its device in one kind alkaline waste water containing aluminium |
| CN210162663U (en) * | 2019-05-08 | 2020-03-20 | 山东天和纸业有限公司 | Prevent blockking up and carry stirring ridge |
| CN111635098A (en) * | 2020-06-05 | 2020-09-08 | 广西广宇水资源技术开发有限公司 | Waste water zero discharge process for concrete mixing plant |
| CN212283180U (en) * | 2020-04-24 | 2021-01-05 | 包头市安顺新型建材有限责任公司 | Tank washing mud filtering device |
-
2021
- 2021-06-03 CN CN202110620777.8A patent/CN113232157A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB444577A (en) * | 1934-09-19 | 1936-03-19 | Int Comb Ltd | Improvements in or relating to coal washing plant |
| CN1579971A (en) * | 2003-08-07 | 2005-02-16 | 上海新型纺纱技术开发中心 | Method and apparatus for concrete waste mortar treatment and reuse |
| TW200829753A (en) * | 2007-01-12 | 2008-07-16 | Ming-Hum Chen | Method for dredging and treatment of sediments from reservoirs |
| KR100817771B1 (en) * | 2007-03-16 | 2008-03-31 | (주)대전산업건기 | Plant for recycling of waste asphalt concrete or waste concrete with grease input device |
| CN203048027U (en) * | 2012-12-07 | 2013-07-10 | 四川顶点建筑工程有限公司 | Anti-blocking type double discharge port spiral conveyer |
| CN105776818A (en) * | 2016-05-03 | 2016-07-20 | 上海幸使环保科技有限公司 | Treatment method and treatment device for treating solid waste with wastewater |
| CN107151034A (en) * | 2017-05-31 | 2017-09-12 | 临汾市华基建材科技有限公司 | A kind of mixing plant sewage water treatment method |
| CN109968538A (en) * | 2019-04-24 | 2019-07-05 | 郑州三和水工机械有限公司 | A kind of concrete mixing plant sewage waste residue recycling system and its equipment |
| CN210162663U (en) * | 2019-05-08 | 2020-03-20 | 山东天和纸业有限公司 | Prevent blockking up and carry stirring ridge |
| CN110357297A (en) * | 2019-07-02 | 2019-10-22 | 马鞍山星奇达新材料科技有限公司 | Water recovery method and its device in one kind alkaline waste water containing aluminium |
| CN212283180U (en) * | 2020-04-24 | 2021-01-05 | 包头市安顺新型建材有限责任公司 | Tank washing mud filtering device |
| CN111635098A (en) * | 2020-06-05 | 2020-09-08 | 广西广宇水资源技术开发有限公司 | Waste water zero discharge process for concrete mixing plant |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113735239A (en) * | 2021-09-22 | 2021-12-03 | 中建西部建设建材科学研究院有限公司 | Waste slurry settling agent for concrete mixing plant and preparation method and use method thereof |
| CN114393712A (en) * | 2022-01-27 | 2022-04-26 | 广州机觉云物联科技有限公司 | Mixing plant waste slurry recovery processing system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103232132B (en) | Magnetic separation method and apparatus for mine water underground treatment | |
| CN113232157A (en) | Waste slurry recycling process and device for mixing plant | |
| CN207913371U (en) | A kind of concrete mixing plant waste water circulatory system | |
| CN107698088A (en) | Magnetic-coagulation precipitates method for purifying water and device | |
| CN217437934U (en) | Reclaimed water reuse treatment system | |
| CN206680234U (en) | Unified water treating apparatus with ballasted flocculation precipitation function | |
| CN206512089U (en) | A kind of flocculation of sludge handles agitating device | |
| CN208916952U (en) | Mine water integrated combination settler | |
| CN104370432B (en) | A kind of sewage treatment process for reducing flocculant usage | |
| CN113354321B (en) | Method and device for recycling waste slurry water of mixing plant | |
| CN208327549U (en) | A kind of mixing plant wastewater ocean disposal system | |
| CN104692559A (en) | High-density sedimentation and clarifying integrated device with square overall upper and lower cross sections for water treatment | |
| CN206108966U (en) | Gas floatation device is dissolved to movable type | |
| CN208500611U (en) | A kind of wastewater of construction electric flocculation processing system | |
| CN112047609A (en) | Desilting sediment efficient dewatering and volume reduction system and process based on resource utilization | |
| CN204643926U (en) | A kind of square of total cross section up and down precipitation clarification equipment | |
| CN105399248A (en) | Treating process and treating system for sewage of concentrating plant or sand producing plant | |
| CN111018183A (en) | Concrete production is recycle device for sewage | |
| CN113307406B (en) | High-efficient separation enrichment facility of stirring station waste slurry water | |
| CN113351342B (en) | Stirring station waste slurry water sectional type grinding recycling process and device thereof | |
| CN221620325U (en) | Harmless and recycling treatment system for shield slag soil | |
| CN214990798U (en) | Pickling passivation sewage treatment system | |
| CN113336359A (en) | Mixing plant waste slurry water enrichment facility | |
| CN217340190U (en) | Sedimentation tank structure for reclaimed water recycling treatment system | |
| CN221296616U (en) | Vehicle-mounted oil and gas field oil extraction wastewater treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210810 |