Cyclic sedimentation method and device, and method for producing dry organic fertilizer powder

Abstract

The invention discloses a cyclic sedimentation method. The cyclic sedimentation method comprises the following steps: step 1, subjecting a stock solution to primary standing in a first storage tank, and transferring a liquid supernatant in the first storage tank into a second storage tank for secondary standing; and 2, transferring a stock solution containing sediments and colloids and located atthe lower layer of the second storage tank into the first storage tank for standing, and transferring the liquid supernatant of the first storage tank into the second storage tank for standing, wherein a liquid supernatant in the second storage tank is a desired raw material. According to the cyclic sedimentation method in the invention, an occupied area is reduced; cost is reduced; multiple timesof sedimentation treatment can be realized to meet requirements according to the conditions of raw material components or requirements of processes on raw material indexes; and no equipment cost needs to be increased.

Description

technical field [0001] The invention relates to the technical field of sedimentation of raw materials used in the production of dry powder by heating and spraying technology, more specifically, the invention relates to a circulation sedimentation method and its device and a method for producing dry powder of organic fertilizer in spraying type. Background technique [0002] Dry powder usually includes water-soluble powdered sugar, yeast powder, milk powder, feed powder, fertilizer powder and various powdered additives. The production of dry powder is usually made by heating and spraying production process. The atomization drying tower is a common equipment. The main production process is: the raw liquid is transported to the atomizer through the pipeline, and the atomizer sprays the raw liquid into the drying tower in the form of mist. Then the hot air is passed into the drying tower to dry and crystallize the mist raw liquid into hot dry powder, and then the hot dry powder ...

AI Technical Summary

Problems solved by technology

First, the existence of insoluble matter in the stock solution will cause sedimentation in the pipes, valves, atomizers and other components through which the stock solution flows, causing blockage, requiring frequent shutdowns for cleaning, resulting in waste of time and labor, and a greater impact on production capacity ; and some insolubles are brought into the finished product, which will lead to a decrease in the effective use of the finished product, and the overall dissolution rate will also decrease (that is, there is a large amount of insolubles that will affect the quality of the finished product or the effect of dilution)

Second, there may be colloidal substances in the original solution. The existence of these substances may cause the dry powder after spray drying to be agglomerated. These agglomerates are usually loose, but when the amount is large, it will cause blockage of the pipeline output to the packaging. , affecting the yield and quality of finished products

When using these traditional methods for operation, the disadvantages are: A. It requires a larger floor area for equipment installation; B. Adding several large storage tanks and filter presses requires a large cost input, such as the need to reach daily output When the production capacity of finished products is 100 tons, the capital investment of the above two types of equipment is expected to be no less than one million yuan; C. It is necessary to increase the number of workers who operate the above equipment, and it is estimated that one shift will need to increase the number of workers by 1-2; D. Increased Electricity, maintenance and management fees

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