[Soda ash knowledge] Daily question (137) 2010.2.26
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Please hide the reply. If you do not hide it, you will not be graded in principle. Edited posts will not be graded. Specific hiding methods: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2 %D8 The title of this issue is taken from the electronic version of the book "Technical Workers Job Training Question Bank-Soda Ash Production Operator": http://bbs.hcbbs.com/thread-13140-1-2.html 1. Short answer questions: 1. In general soda ash production, why is it necessary to add a sedimentation aid to the clarification of ammonia brine? What is its theoretical basis?
During the clarification process, in order to increase the size of precipitated particles such as CaCO3 and MgCO3, a polymer flocculant is added to adsorb the solids in the brine that cannot be suspended, resulting in a bridging phenomenon. At the same time, it is accompanied by charge neutralization and plays a good coagulation effect. The complex flocs then adsorb each other, entangle together, and gradually grow and aggregate into larger particles. The clarification operation is based on the principle of gravity, that is, the solid particles suspended in the brine are heavier than the brine and naturally settle by gravity, causing the impurities to stratify with the clear water.
answer: In the clarification process, in order to increase the size of precipitated particles such as calcium carbonate and magnesium carbonate, polymer flocculants are added to adsorb solid insoluble suspended solids in the brine, resulting in a bridging phenomenon, accompanied by charge neutralization, which plays a good coagulation effect, and the complex agglomerates are adsorbed and entangled with each other, and gradually grow and aggregate into larger particles. The clarification operation is based on the principle of gravity sedimentation, that is, the solid particles suspended in the brine are heavier than the brine and settle freely by gravity, causing the impurities to stratify with the clear liquid. According to Stokes formula: ω=d2(ρ1-ρ2)/18υ (ω: Sedimentation rate d2: Solid particle diameter ρ1, ρ2 Solid particle and clear liquid density υ Suspension viscosity) 1# 9067jxhuas
answer: During the clarification process, in order to increase the size of precipitated particles such as calcium carbonate and magnesium carbonate, a polymer flocculant is added to adsorb the solid insoluble suspended matter in the brine, resulting in a bridging phenomenon, accompanied by charge neutralization, which plays a good coagulation effect. The complex flocs then adsorb each other, entangle together, and gradually grow and aggregate into larger particles. The clarification operation is based on the principle of gravity, that is, the solid particles suspended in the brine are heavier than the brine and settle freely by gravity, causing the impurities to stratify with the clear liquid.
During the clarification process, in order to increase the size of precipitated particles such as calcium carbonate and magnesium carbonate, a polymer flocculant is added to adsorb the solid insoluble suspended matter in the brine, resulting in a bridging phenomenon, accompanied by charge neutralization, which plays a good coagulation effect. The complex flocs then adsorb each other, entangle together, and gradually grow and aggregate into larger particles. The clarification operation is based on the principle of gravity, that is, the solid particles suspended in the brine are heavier than the brine and settle freely by gravity, causing the impurities to stratify with the clear liquid.
During the clarification process, in order to increase the size of precipitated particles such as calcium carbonate and magnesium carbonate, polymer flocculants are added to adsorb solid insoluble suspended solids in the brine, resulting in a bridging phenomenon, accompanied by charge neutralization, which plays a good flocculation effect. The complex flocs then adsorb each other, entangle together, and gradually grow and aggregate into larger particles. The clarification operation is based on the principle of gravity, that is, the solid particles suspended in the brine are heavier than the brine and settle freely by gravity, causing the impurities to stratify with the clear liquid. According to Stokes' formula, the constant velocity motion of settlement is expressed by the following formula, w=d2(ρ1 - ρ2)/18μ.
During the clarification process, in order to increase the size of precipitated particles such as CaCO3 and MgCO3, a polymer flocculant is added to adsorb the solids in the brine that cannot be suspended, resulting in a bridging phenomenon. At the same time, it is accompanied by charge neutralization and plays a good coagulation effect. The complex flocs then adsorb each other, entangle together, and gradually grow and aggregate into larger particles. The clarification operation is based on the principle of gravity, that is, the solid particles suspended in the brine are heavier than the brine and naturally settle by gravity, causing the impurities to stratify with the clear water. 1# 9067jxhuas
During the clarification process, in order to increase the size of precipitated particles such as CaCO3 and MgCO3, a polymer flocculant is added to adsorb the solids in the brine that cannot be suspended, resulting in a bridging phenomenon. At the same time, it is accompanied by charge neutralization and plays a good coagulation effect. The complex flocs then adsorb each other, entangle together, and gradually grow and aggregate into larger particles. The clarification operation is based on the principle of gravity, that is, the solid particles suspended in the brine are heavier than the brine and naturally settle by gravity, causing the impurities to stratify with the clear water.
In the brine refining process of soda ash production, in order to precipitate Ca2+ and Mg2+ impurities as quickly as possible, a sedimentation aid needs to be added to generate calcium carbonate, and magnesium carbonate will precipitate quickly.
During the clarification process, in order to increase the size of settled particles such as CaCO3 and MgCO3, a polymer coagulant is added to adsorb the solid insoluble suspended solids in the brine, resulting in a bridging phenomenon. At the same time, it is accompanied by charge neutralization and plays a good coagulation effect. The complex flocs then adsorb each other, entangle together, and gradually grow and aggregate into larger particles. The clarification operation is based on the principle of gravity, that is, the solid particles suspended in the brine are heavier than the brine and settle freely by gravity, causing the impurities to stratify with the clear liquid. According to Stoke's formula, the constant velocity motion of settlement is expressed by the following formula: w=d2(p1-p2)/18u where: w---clarification rate, cm/s; d2---diameter of solid particles, cms p1, p2---density of solid particles and clear liquid, g/cm3s u---viscosity of suspension, g/cm.
During the clarification process, in order to increase the size of the precipitated particles such as CaCO3 and MgCo3, a polymer coagulant is added to adsorb the solid insoluble suspended solids in the brine, resulting in a bridging phenomenon, accompanied by charge neutralization, which plays a good coagulation effect, while the complex flocs adsorb each other, entangle together, and gradually grow and aggregate into larger particles. The clarification operation is based on the principle of gravity, that is, the solid particles suspended in the brine are heavier than the brine and only settle due to gravity, causing the impurities to stratify with the clear liquid. According to Stokes' formula, the constant velocity motion of settlement is expressed by the following formula: ω=d2(ρ1-ρ2)/18μ where: ω-clarification rate, cm/s ； d2－Diameter of solid particles, cm ； ρ1, ρ2 - Density of solid particles and clear liquid, g/cm3 ； μ - suspension viscosity, g/cm