Stirring device for defluorination conversion device for producing calcium superphosphate and stirring method

Abstract

The invention discloses a stirring device for a defluorination conversion device for producing calcium superphosphate and a stirring method. The stirring device comprises a hood (2), and a fixed stirrer (16), a feed scattering device (17), a stirring pipe (18) and a feed evening device (19) are arranged in the hood (2) in the direction that feed is delivered in sequence; the fixed stirrer (16) comprises a primary wedge-shaped opening (16-1), the large opening end of the primary wedge-shaped opening (16-1) is at the same side as the feed inlet end of the feed, a feed distributing block (16-2) is arranged at one side of the small opening end of the primary wedge-shaped opening (16-1), the small end of the feed distributing block (16-2) is at the same side as the small opening end of the primary wedge-shaped opening (16-1), a secondary wedge-shaped opening (16-3) is formed in one side of the large end of the feed distributing block (16-2), and the large opening end of the secondary wedge-shaped opening (16-3) is at the same side as that of the feed distributing block (16-2); the feed scattering device (17) is arranged at one side of the small opening end of the secondary wedge-shapedopening (16-3). The stirring device has the advantages of saving resources and being environmentally friendly and high in efficiency when being used in cooperation with a defluorination conversion device.

Description

technical field [0001] The invention relates to the field of phosphorus chemical industry, in particular to a stirring device and a stirring method for producing a calcium superphosphate defluorination conversion device. Background technique [0002] At present, the conversion machine (mixer) for the production of superphosphate can only use high-grade primary phosphate rock with a phosphorus content of 31.5%-32%, in order to produce first-grade superphosphate; the production of superphosphate in this way is not only The production cost is high, and the waste of mineral resources is caused. In addition, the use of primary high-grade phosphate rock to produce calcium phosphate requires a large amount of sulfuric acid, and a large amount of harmful tetrafluoride gas will be emitted into the atmosphere during the production process, causing environmental pollution. The current calcium superphosphate production technology cannot convert calcium hydrogen phosphate and lime phosp...

AI Technical Summary

Problems solved by technology

[0002] At present, the conversion machine (mixer) for the production of superphosphate can only use high-grade primary phosphate rock with a phosphorus content of 31.5%-32%, in order to produce first-grade superphosphate; the production of superphosphate in this way is not only High production cost and waste of mineral resources

In addition, the use of primary high-grade phosphate rock to produce calcium phosphate shares requires a large amount of sulfuric acid, and a large amount of harmful tetrafluoride gas will be emitted into the atmosphere during the production process, causing environmental pollution.

The current calcium superphosphate production technology cannot convert calcium hydrogen phosphate and lime phosphorus slag (citrate-soluble phosphorus) into calcium superphosphate (water-soluble phosphorus), thus causing calcium hydrogen phosphate and lime phosphorus slag to be piled up as waste residues, so and pollute the environment, occupying a large amount of land resources; not only that, there are also unscrupulous traders using unconverted calcium hydrogen phosphate and lime phosphorus slag to make fake fertilizers, pitting farmers against farmers, and obtaining huge profits

In order to solve the above problems, the applicant has designed a defluorination conversion device for the production of calcium superphosphate, which realizes the production of calcium superphosphate with calcium hydrogen phosphate and lime phosphorus slag as raw materials, and realizes the comprehensive utilization of resources; but the device has produced For calcium phosphate, the traditional mixing device cannot be used for mixing and stirring, and the traditional mixing device will beat the material during mixing to cause the material to gelatinize; therefore, a new type of mixing device is needed to cooperate with the defluorination conversion device. There is no agitation device that works well with this defluorination conversion unit

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