【Daily Question】Chemical Engineering Principles 327: Mechanically Stirred Clarifier (February 25)
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This post was last edited by Zaihui Kangqiao on 2016-3-21 at 15:12. The Chemical Engineering Theory section is now launching a \"One Question per Day\" activity to help everyone reinforce their basic knowledge in chemical engineering. Subsequent series such as \"Principles of Chemical Engineering\", \"Mass Transfer and Separation\", \"Thermodynamics in Chemical Engineering\", and \"Chemical Process Engineering\" will also be introduced. We hope you will give it your active support! Wishing everyone a happy Christmas! Answers to the questions in the \"One Question per Day\" activity can be viewed directly, and the thread will be closed after 1 day ! To encourage continued participation from everyone this year! You get 3 wealth rewards just for participating, and an additional 4 wealth points if you answer correctly~~~ Short answer question: Briefly describe the working principle of a mechanical stirred clarifier The mechanically stirred clarifier uses the lifting action of the stirrer impeller to cause the sludge that has been formed earlier and settled in the sludge zone to return to the reaction zone, where it contributes to the formation of new sludge. In this process, the sludge formed earlier acts as a crystallization core and for contact adsorption, facilitating the rapid growth of new sludge and thus achieving effective separation.
The mechanically stirred clarifier uses the lifting action of the stirrer impeller to cause the sludge that has been formed earlier and settled in the sludge zone to return to the reaction zone, where it contributes to the formation of new sludge. In this process, the sludge formed earlier acts as a crystallization core and for contact adsorption, facilitating the rapid growth of new sludge and thus achieving effective separation.
A mechanically stirred clarifier combines the mixing chamber and the reaction chamber into one unit; raw water enters directly into the first reaction chamber, where the stirring action of the impeller blades and turbines facilitates rapid mixing of the incoming water, chemicals, and a large amount of returned sludge. The mechanical reaction takes place in this first reaction chamber, during which the substances collide with and adhere to the existing sludge in the returned sludge, forming larger flocs. These flocs are then lifted by the turbines to the second reaction chamber, from where they are directed to the clarification zone for separation. The clear water rises and is collected through a water collection tank, while the sludge returns to the first reaction chamber at the bottom of the clarification zone. It is gathered by a sludge scraper and discharged through a sludge discharge valve at the bottom of the tank, thereby achieving the purpose of clarifying and separating the raw water.
The mechanically stirred clarifier uses the lifting action of the stirrer impeller to cause the sludge that has been formed earlier and settled in the sludge zone to return to the reaction zone, where it contributes to the formation of new sludge. In this process, the sludge formed earlier acts as a crystallization core and for contact adsorption, facilitating the rapid growth of new sludge and thus achieving effective separation.
The mechanically stirred clarifier uses the lifting action of the stirrer impeller to cause the sludge that has been formed earlier and settled in the sludge zone to return to the reaction zone, where it contributes to the formation of new sludge. In this process, the sludge formed earlier acts as a crystallization core and for contact adsorption, facilitating the rapid growth of new sludge and thus achieving effective separation.
The mechanically stirred accelerated clarifier utilizes the lifting action of the stirrer impeller to cause the sludge that has been formed earlier and settled in the sludge zone to return to the reaction zone, where it contributes to the formation of new sludge.
The mechanically stirred accelerated clarifier utilizes the lifting action of the stirrer impeller to cause the sludge that has been formed earlier and settled in the sludge zone to return to the reaction zone, where it contributes to the formation of new sludge.
The wastewater enters the annular distribution trough through the inlet pipe, while the coagulant is added to the distribution trough via a dosing pipe; both then flow into the mixing zone where water, chemicals, and returned sludge are mixed together. Due to the lifting effect of the turbine, the mixed slurry is lifted to the reaction zone to continue the coagulation reaction, and then overflows into the diversion zone. The guide vanes in the diversion area eliminate the circular flow coming from the reaction area, allowing the waste fluid to flow steadily along the umbrella-shaped cover into the separation area. The exhaust pipe in the separation area expels the air brought in with the wastewater, reducing interference with the sludge-water separation. The separation zone has a large area; due to the sudden increase in the water flow area, the flow velocity decreases, and the sludge settles naturally under the force of gravity, while the supernatant flows out of the tank through the collection tank and outlet pipes. A small portion of the sludge enters the concentration zone and is removed regularly through sludge discharge pipes, while most of the sludge returns to the mixing zone via the return slots under the action of the turbine.
A mechanically stirred clarifier combines the mixing chamber and the reaction chamber into one unit; raw water enters directly into the first reaction chamber, where the stirring action of the impeller blades and turbines facilitates rapid mixing of the incoming water, chemicals, and a large amount of returned sludge. The mechanical reaction takes place in this first reaction chamber, during which the substances collide with and adhere to the existing sludge in the returned sludge, forming larger flocs. These flocs are then lifted by the turbines to the second reaction chamber, from where they are directed to the clarification zone for separation. The clear water rises and is collected through a water collection tank, while the sludge returns to the first reaction chamber at the bottom of the clarification zone. It is gathered by a sludge scraper and discharged through a sludge discharge valve at the bottom of the tank, thereby achieving the purpose of clarifying and separating the raw water.
Briefly describe the working principle of a mechanically stirred clarifier? Answer: The mechanically stirred clarifier uses the lifting action of the stirrer impeller to bring back the sludge that has been formed earlier and settled in the sludge zone to the reaction zone, where it contributes to the formation of new sludge. In this process, the sludge formed earlier acts as a crystallization core and for contact adsorption, facilitating the rapid growth of new sludge and thus achieving effective separation.
Briefly describe the working principle of a mechanically stirred clarifier? The mechanically stirred clarifier uses the lifting action of the stirrer impeller to cause the sludge that has been formed earlier and settled in the sludge zone to return to the reaction zone, where it contributes to the formation of new sludge. In this process, the sludge formed earlier acts as a crystallization core and for contact adsorption, facilitating the rapid growth of new sludge and thus achieving effective separation.