technical field
The invention relates to the field of polyaluminum chloride production, in particular to a recycling device for polyaluminum chloride production waste slag.
Background technique
Polyaluminum chloride is a water purification material, inorganic polymer coagulant, also referred to as polyaluminum, English abbreviation is PAC, the molecular weight produced due to the bridging effect of hydroxide ions and the polymerization of polyvalent anions Larger, higher charge inorganic polymer water treatment agent.It can be divided into solid and liquid in form.The solid can be divided into brown, beige, golden yellow and white according to the color, and the liquid can be colorless and transparent, slightly yellow, light yellow to yellowish brown, and polyaluminum chloride of different colors has different advantages in application and production technology. big difference.
The production of polyaluminum chloride includes: metal aluminum method, aluminum hydroxide method, aluminum trioxide method, aluminum chloride method; no matter which method is used, solid or powder raw materials will be used, and solid and powder raw materials are used During the process, there are often incomplete reactions and deposits at the bottom of the reactor. Therefore, recycling the incompletely reacted raw materials can save production costs. At present, most recycling devices just dry the materials in the reactor through a filter press. Then directly put into reactor to use again, this kind of method is squeezed dry material also has reaction residue, and recycling again can affect the purity of polyaluminum chloride.
Contents of the invention
The purpose of the present invention is to provide a polyaluminium chloride production waste slag recovery and utilization device with scientific and reasonable structure design and the ability to repeatedly clean the filter cake.
The technical scheme adopted in the present invention is: a polyaluminum chloride production waste residue recovery and utilization device, which mainly includes a filter press, a filter cake smasher, a feeder, a washing kettle, a waste liquid tank and a mud pump connected in sequence. The top of the washing kettle is provided with a stirring motor, a feed port and a liquid inlet, and the inside of the washing kettle is provided with a stirring device, and the stirring device is connected with the stirring motor, and the side wall of the washing kettle is provided with a waste liquid outlet, and the waste liquid The outlet is connected to the waste liquid tank, the bottom of the washing kettle is provided with a discharge port, and the discharge port is connected to a three-way valve, one end of the three-way valve is connected to the mud pump, and the other end is connected to the recovery pump, and the recovery pump The other end is connected to a filter press, and the other end of the mud pump is connected to a reaction kettle for producing polyaluminum chloride.
Preferably, the filter press is a plate and frame filter press.
Preferably, the washing kettle, the waste liquid tank and the three-way valve are all stainless steel.
The advantages of the present invention are: a three-way valve is used at the discharge port, one end of the three-way valve is connected to the mud pump, and the other end is connected to the recovery pump. If the filter cake needs to be cleaned again, it can be pumped to the filter press through the recovery pump, and the After filtering, it is cleaned again. After cleaning, it can be pumped to the reactor by mud pump for reuse.
Description of drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
In the figure: 1 is the filter press, 2 is the filter cake smasher, 3 is the feeding machine, 4 is the washing kettle, 4.1 is the feeding port, 4.2 is the stirring motor, 4.3 is the liquid inlet, 4.4 is the waste liquid outlet , 4.5 is a discharge port, 4.6 is a stirring device, 5 is a waste liquid tank, 6 is a mud pump, 7 is a three-way valve, and 8 is a recovery pump.
specific embodiment
A kind of polyaluminium chloride production waste slag recovery and utilization device, mainly comprises successively connected filter press 1, filter cake pounder 2, feeder 3, washing kettle 4, waste liquid tank 5 and mud pump 6, described washing The top of the kettle 4 is provided with a stirring motor 4.2, a feed port 4.1 and a liquid inlet 4.3, and the inside of the washing kettle 4 is provided with a stirring device 4.6, and the stirring device 4.6 is connected with the stirring motor 4.2, and the side wall of the washing kettle 4 is provided with waste Liquid outlet 4.4, the waste liquid outlet 4.4 is connected with the waste liquid tank 5, the bottom of the washing kettle 4 is provided with a discharge port 4.5, and the discharge port 4.5 is connected with a three-way valve 7, and one end of the three-way valve 7 is connected to The mud pump 6 is connected, the other end is connected to the recovery pump 8, the other end of the recovery pump 8 is connected to the filter press 1, and the other end of the mud pump 6 is connected to the reaction kettle for producing polyaluminum chloride (not shown in the figure) , the filter press 1 is a plate and frame filter press, and the washing kettle 4, the waste liquid tank 5 and the three-way valve 7 are all stainless steel.
When working, after the recovered materials are squeezed dry by the filter press 1, the filter cake enters the filter cake masher 2 to be crushed, and then enters the feeder 3, and at the same time, the washing kettle 4 turns on the stirring motor 4.2 to drive the stirring device 4.6 to start rotating, The liquid port 4.3 is put into the cleaning liquid, and the feeding machine 3 starts to put the crushed filter cake into the washing kettle 4. After the cleaning and precipitation of the washing kettle 4, the cleaning waste liquid enters the waste liquid tank 5 through the waste liquid outlet 4.4, and the material passes through the tee The recovery pump 8 connected to the valve 7 enters the filter press 1 again for pressure filtration, and repeats in turn until it is cleaned, and the mud pump 6 connected to the three-way valve 7 is pumped to the reaction kettle for producing polyaluminum chloride
