Technology for removing and leaching impurity in mixed liquor in production of lutein factice

Abstract

The invention discloses a technology for removing and leaching impurities in mixed liquor in the production of lutein factice, which relates to a technology part and an equipment part. The leaching technology comprises the following steps: an olefin pump is adopted to generate power, and two leaching tanks are used for circularly soaking and extracting; differential pressure is 1.5MPa-2MPa when liquor is poured; an evaporating tank No. 1 is adjusted to 50 DEG C-55 DEG C, and the evaporating time is not more than 10 minutes; and the opening degree between a liquor inlet valve and a liquor outlet valve of each filter is adjusted in such a way that the opening degree of the liquor inlet valve is smaller than that of the liquor outlet valve. The filter screen density of each of the three filters is A1 of 200 meshes, A2 of 350 meshes and A3 of 400 meshes; and the two adjacent filters are connected in a mixing way of parallel connection and series connection, two annular grooves are respectively processed in the position with not less than 5 cm of distance from the upper bottom and the lower bottom of a filter element, and a strip connecting groove is processed between the two annular grooves so as to form a filter screen mounting groove communicated by the three grooves. The impurity content of a lutein factice product is reduced to below 1 percent by technical measures of a technology aspect and an equipment aspect.

Description

technical field [0001] The invention relates to a method of extracting and producing marigold lutein ointment products by using dried flower granules made of marigold flowers as raw materials and adopting a solvent extraction and separation process. It is a method for removing impurities in the extraction mixture in the production of extracting lutein ointment. Background technique [0002] In the process of producing lutein ointment with marigold dried flower granules as raw materials, it involves the technology of removing tiny suspended solid particles from the leaching mixture. The effect of this technology is directly related to whether the content of impurities in the product can meet the technical standards of the product. That is, whether the quality of the finished lutein ointment is qualified. Currently, marigold lutein ointment is mainly produced in the world by the method of solvent extraction and separation process with small investment and low cost. One of th...

AI Technical Summary

Problems solved by technology

One of the reasons is that there are problems in the process: one is that the single-pass immersion extraction under mechanical agitation is adopted, and the structure of dried marigold dried flowers in the leaching tank is destroyed due to agitation, which increases the impurity amount of solid suspended fine particles in the leaching mixture; The second is that the pressure difference is too large when the leaching mixed solution is poured into the tank, that is, 2.5Mpa--3Mpa, which makes the flow rate of the mixed solution too fast, destroys the dried marigold flower particle structure in the leaching tank, and increases the amount of impurities in the mixed solution; Increased the difficulty and workload of impurity treatment for subsequent processes

The third is to use the temporary storage tank only as a temporary storage turnover during the mixed liquid inversion tank delivery process. Under normal and balanced production conditions, the temporary storage tank is not used, ignoring the settlement of the mixed liquid in a static state of suspended solid tiny particles Treatment; Fourth, before pouring liquid from 1# evaporation tank to 2# evaporation tank, the evaporation time of 1# evaporation tank is too long and the temperature is low, that is, the evaporation time is 40 minutes and the temperature is 40°C-50°C, resulting in 1# evaporation The mixed liquid in the tank has high concentration and high viscosity. When the 1# evaporation tank pours the liquid into the 2# evaporation tank and passes through the filter, the flow rate is slow, the output is low, and the filter cake is easy to form on the filter screen, which often causes the filter screen to block and stop production.

The second reason is the problems in the equipment: First, as the three key equipment for filtering impurities - the filter, the density of the filter used is too small, which are 100 mesh, 200 mesh and 200 mesh in turn, and the impurity particles in the mixed liquid Extremely small, the filter of this kind of filter can only filter larger impurity particles, but cannot filter tiny impurity particles

The second is that it is unreasonable to use a single parallel structure for the two filters between the 1# evaporation tank and the 2# evaporation tank. Only one of the two filters is used, and the other is only used as a backup device

[0003] Therefore, according to the current production process and the lutein ointment produced by defective filter equipment, the impurity content is high and difficult to control, and the quality of the lutein ointment product is difficult to meet the product quality standard

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