Evaporation equipment in pharmaceutical purification workshop
Evaporation equipment in pharmaceutical purification pharmaceutical cleanroom
Evaporation in purification pharmaceutical cleanroom is the operation of heating the solution to boiling, so that part of the solvent is evaporated and removed, thereby increasing the concentration of the solution or concentrating the solution to saturation and precipitation of solutes. The purpose is to concentrate the solution or recover the solvent. Evaporation process The process has downstream, countercurrent, mixed...
Text label: Pharmaceutical purification pharmaceutical cleanroom, evaporation equipment, Zhongjing Global purification
Pharmaceutical purification workshop plant evaporation equipment
Evaporation in purification workshop is the operation of heating the solution to boiling, so that part of the solvent is evaporated and removed, thereby increasing the concentration of the solution or concentrating the solution to saturation and precipitation of solutes. The purpose is to concentrate the solution or recover the solvent. Evaporation process The process has four forms: cocurrent, countercurrent, mixed flow and advection; the single-effect falling film evaporation process with indirect condenser is suitable for small processing capacity, high evaporation intensity, high boiling point rise of materials, low heating steam pressure, continuous or intermittent operation. It is especially suitable for the evaporation of materials that need to be recovered from condensed water or secondary steam. It is characterized by low investment and high steam consumption. The boiling point of the heat pump is increased, the heating steam pressure is low and the intermittent operation is characterized by low investment and high steam consumption; the three-effect heat pump evaporation process is suitable for materials with large processing capacity, small boiling point rise and low evaporation temperature.
Central circulating tube evaporator, the larger diameter tube in the center of the heating chamber is the central circulating tube, surrounded by smaller diameter heating tube bundles, all of which are installed vertically. The vaporization rate of the solution is low, the bubbles are formed less, and the relative density is high, so the solution rises in the heating tube, descends in the central circulation tube, and circulates regularly. It is suitable for solutions with high viscosity; the advantages are simple structure, operation Reliable, but the disadvantages are troublesome maintenance and low cycle speed. The heating tube bundle of the hanging frame evaporator is like a basket, which is suspended in the lower heating chamber and can be taken out for cleaning and maintenance. There is an annular gap with a large cross-sectional area between the heating tube bundle and the shell. It rises when heated, descends in the annular space, and circulates continuously; compared with the central circulating tubular evaporator, the circulation speed is faster, the cleaning and maintenance are convenient, the heat loss is small, but the structure is complicated; solution. Forced circulation evaporator, a circulation pump is installed on the pipeline of the circulation pipe of the externally heated evaporator to form a forced circulation evaporator suitable for crystal precipitation. The forced circulation evaporator can improve the production intensity, but it needs to add a pump and increase operating costs. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for pharmaceutical purification workshops and clean workshops.
Film evaporator is a single-pass evaporator, which makes the solution flow in a thin film at a high speed, and the solvent in it quickly evaporates into secondary evaporation. The completed liquid can be obtained by separating and removing the secondary steam in the separation chamber. Fast, short heating time, especially suitable for the concentration of heat-sensitive materials, widely used in the pharmaceutical industry; there are rising film evaporators, falling film evaporators, scraped film evaporators, centrifugal thin film evaporators, plate evaporators. The rotating drum of the centrifugal thin film evaporator has multi-layer conical heating surfaces, the conical disc is hollow, and the heating steam flows through it. A film of 0.05-1mm is formed on the shaped disc, which is quickly flowed from the center to the outer edge, and the completed liquid is collected at the periphery of the drum and flows out through the discharge pipe; the condensed water is collected at the periphery of the heating steam channel under the action of centrifugal force, and the condensed water The discharge pipe flows out, the evaporator is generally operated in vacuum, and the secondary steam is drawn out through the channel on the side wall; it is suitable for heat-sensitive materials, and it is not suitable for materials with high viscosity, easy scaling and crystallization; the advantage of high heat transfer coefficient , The evaporation intensity is large, the heating time of the material and liquid is short, and the disadvantage is complex structure and high price.
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