Application of polyaluminium chloride in wastewater treatment sites
2021-11-22
This issue should be analyzed in detail according to the actual situation, and today I would like to introduce how to use polyaluminum chloride.
At present, people are accustomed to buy solid aluminum chloride, so the dissolving agent before use is the basic knowledge of using polyaluminum chloride. Polyaluminium chloride needs to be dissolved at room temperature. For on-site use, you need to put the polyaluminum chloride into the dissolution tank, directly inject tap water to dissolve it, stir it to dissolve fully, and then leave it to get the polyaluminum chloride solution. In most cases, the weight ratio of polyaluminium chloride is 1:4 or 1:5 or 1:5. When using, it should be diluted according to the concentration of the polyaluminium chloride solution used.
When using polyaluminium chloride in actual wastewater, it is necessary to conduct a small test on the reasonable dosage and concentration of polyaluminium chloride, then configure the corresponding concentration of polyaluminium chloride solution to be pumped into the metering tank through the dosing pump, and then fully mix the polyaluminium chloride solution with the wastewater through the mixing device.
Since the property cannot be kept for a long time, the configured polyaluminium chloride solution needs to be used on the same day and therefore needs to be configured on the same day. Due to the use of tap water, there will be a small amount of precipitation in the polyaluminium chloride solution most of the time, but it has no effect on the effectiveness of the use of polyaluminium chloride.
How to use polyaluminium chloride? In most cases, changes still need to be made to suit the site conditions. There is no fixed method. Only the rational use of aluminum chloride can achieve the desired effect.
The correct use of polyaluminium chloride directly affects its use effect. The exact use of polyaluminium chloride usually depends on how and how much polyaluminium chloride is used. However, in practical application, the usage of polyaluminium chloride may change due to different site conditions. What should I pay attention to in practical application?
In fact, commonly used polyaluminium chloride is used for melting equipment. The dissolved polyaluminum chloride is added to the wastewater through reaction addition equipment. The corresponding reaction tank, post-sedimentation equipment or dewatering equipment is usually set up during the reaction process. Only through the action of these equipment, the polymerization of aluminum chloride can obtain better application results.
There are many kinds of dissolution equipment in practice, but generally the dissolution is done directly with tap water with corresponding mixing equipment to fully dissolve the PVC aluminum chloride. The preparation of PVC aluminum chloride into a solution and adding it to it is actually a doser. The doser pumps an aqueous solution of PVC aluminum chloride into the effluent, and the reaction device is usually a flow-through device. The addition of the PVC aluminum chloride solution to the flowing effluent results in a well-mixed reaction at a slow flow rate. Then, the reaction solution is passed through the corresponding sedimentation equipment or filter press equipment to achieve water purification.
When using polyaluminium chloride, its own characteristics should be considered and suitable aluminium chloride products should be selected according to the sewage treatment situation, and then used according to the actual situation to achieve the desired effect.
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