Original water treatment process flow chart;
Process description:
The beneficiation wastewater from the flotation plant first flows into the classifier to remove most of the coarse sand and then overflows into the thick pool. Two water treatment agents are added to the overflow pipe from the classifier to the thick pool to accelerate the sedimentation. Part of the suspended matter sinks to the bottom under the action of the agent, and the thick pool overflow liquid flows to the clear water pool and is used for rough selection; the mud at the bottom of the thick pool is slowly discharged to the natural dry pool, and is naturally dried and transported by a forklift.
Disadvantages of the old craft:
Since the suspended matter in the beneficiation wastewater is completely flocculated by the water treatment agent, the dosage is too large, and the excess water treatment agent remains in the clean water to make the organic content in the water exceed the standard, and the flocculation effect of the water treatment agent is seriously affected. The flotation effect.
Suggestions for rectification:
The biggest drawback of the old process is the excessive use of water treatment agents. Therefore, it is recommended to fundamentally solve the problem of drug dosage. After the amount of water treatment agent is reduced, the organic content in the clear water will not exceed the standard, and it will not affect the flotation.
Improved process flow chart:
Process description:
The beneficiation wastewater discharged from the workshop first flows into the classifier to remove most of the coarse sand. The classifier overflows into the thick pool, and then flows into the intermediate tank after further precipitation in the thick pool. The wastewater in the intermediate tank is pumped into the LJW filter through the pipeline pump. Add water treatment agent to the auxiliary filter before the filter. The clear water of the filter can be reused for production. The bottom of the filter will discharge a small amount of mud to the thick pool at intervals, so that the residue remains in the mud. The medicament can also be fully recycled, and the mud discharged from the bottom of the thick pool flows to the natural drying tank to be air-dried and then transported away.
Process technology principle:
(1) In the stage of the spiral classifier, most of the sand and large particles of mud in the wastewater are removed.
(2) In the sedimentation tank stage, the suspended solids which can be naturally precipitated in the wastewater for a short time are removed.
(3) In the LJW filter stage, it is difficult to precipitate fine suspended matter in the wastewater and the excess flotation agent is removed by filtration.
(4) The residual agent in the mud discharged from the bottom of the LJW filter can be recycled after being returned to the thick pool, and the cost of the medicament will be lower and lower after a long period of circulation.
Process technology features:
(1) The process energy consumption is small. Except for the power consumption of the pump and the mixer, there is almost no energy-consuming equipment. This technology has advanced technology, low operating cost, energy saving, reduced running time, reduced personnel shift and labor intensity, etc. Various types of domestic sewage treatment projects;
(2) Small footprint, because the LJW filter has strong filtering effect and high processing capacity, it can withstand the load caused by certain water quality changes, so the area of ​​the sedimentation tank will not be too large; LJW filter itself The land area is only 13m2, which greatly saves the land use area;
(3) The labor cost is low, and the LJW filter itself can realize automatic operation, which greatly reduces the labor cost;
(4) The cost of the water treatment agent is low, the process itself requires a small amount of medicament, and the precise method of adding the medicine is adopted, which greatly saves the dosage of the medicine and saves the cost of the medicine.
(5) The equipment has no wearing parts. The LJW filter is made of FRP material as a whole. The packing can be recycled, so it can run stably for a long time without replacing any parts regularly.
Introduction to LJW filter:
The LJW filter is an efficient filtration and separation device. The main material of the filter is epoxy vinyl resin, which is resistant to acid, alkali and oxidation and can be used to treat acidic, alkaline and neutral liquids. The equipment itself does not consume electricity, only one inlet pipe pump is needed to pump the tailings water to the equipment.
The vertical porous water distributor is first used in the LJW filter to not only buffer the balance of water flow, but also to make the flocculation group in the wastewater fully combine with coagulation, which makes it easier to precipitate. Secondly, it combines the advantages of various sedimentation tanks. The principle has designed a multi-layered grading filter device to filter the suspended solids in the wastewater which are less likely to precipitate, which greatly enhances the filter capacity of the filter. Finally, the top of the filter adopts the traditional partition + water cap. At the bottom of the board, the domestic advanced polymer polymerization filter pellets are added, and the surface of the pellets has a small amount of electric charge, which not only makes the pellets tighter, but also has a better filtering effect, and enables the surface of each pellet to be adsorbed and suspended. The fine suspensions that are not trapped by the filter beads are intercepted in this way. Because the charge on the surface of the ball is small, the fine suspension adhering to the surface of the ball encounters the reverse flow. It is easy to be washed down, so that the filter pellet can be reused for a long time without replacement.
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