Tubular reactor convenient for temperature control and use method thereof

Abstract

The invention discloses a tubular reactor convenient for temperature control and a use method thereof.The tubular reactor comprises a tubular reaction mixing head, one end of the tubular reaction mixing head is fixedly connected with a tubular reaction slurry pipe, a steam tank is arranged on the outer side of the tubular reactor, and the tubular reactor can be purged when the interior of the tubular reactor is blocked by foreign matters, so that safe production is ensured, and the production efficiency is improved. Meanwhile, the tubular reactor is applied to a granular monoammonium device, so that the generation proportion of impurity salt in ammoniation reaction is reduced, relatively high slurry neutralization degree is obtained by controlling the density of concentrated acid before reaction, final nutrients of the product are guaranteed, and in addition, the problems that impurities cannot be reduced and the nutrients are difficult to guarantee in concentrated full-load production can be avoided; moreover, a tail gas pipeline does not need to be newly added, the process route is short, the construction period is short, the investment cost is low, meanwhile, the heating mechanism and the cooling mechanism are utilized, the temperature in the tubular reactor can be rapidly controlled, the production efficiency is guaranteed, and practical application is facilitated.

Description

technical field [0001] The invention belongs to the technical field of diammonium phosphate production, in particular to a tubular reactor convenient for temperature control and a method for using the same. Background technique [0002] In the current life, diammonium phosphate is an inorganic substance with a molecular weight of 132.06, colorless and transparent monoclinic crystal or white powder. It is widely used in printing and plate making, medicine, fire prevention, electronic tubes, etc. , high-efficiency fertilizers for rice and wheat, industrially used as feed additives, ingredients for flame retardants and fire extinguishing agents, etc., while diammonium phosphate is generally produced by slurry method to produce 60% nutrient diammonium phosphate, and in the production of diammonium phosphate In the production process, the granular monoammonium device is specifically used for its production and preparation. In practical applications, after the two sets of filtrati...

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Problems solved by technology

[0002] In existing life, diammonium phosphate is an inorganic substance with a molecular weight of 132.06, colorless transparent monoclinic crystal or white powder, widely used in printing plate making, medicine, fire prevention, electronic tubes, etc. , high-efficiency fertilizers for rice and wheat, industrially used as feed additives, flame retardants and fire extinguishing ingredients, etc., and when diammonium phosphate is produced, the slurry method is generally used to produce 60% nutrient diammonium phosphate, and in In the production process, the granular monoammonium device is used for production and preparation. In actual application, after the two sets of filtration equipment and two sets of concentration equipment are fully loaded, the capacity of the concentrated acid settling device is small, and the solid content index control and The effective removal capacity of impurities is limited. If a neutralization tank is equipped with the granular monoammonium plant, it is difficult to reach 60% of the nutrient due to factors such as low final neutralization degree of the product and high impurities in concentrated acid. At the same time, it is affected by the site environment and equipment safety. Influenced by the distance, the slurry pipeline of the neutralization tank is long, the slurry viscosity is high, the pipeline is easy to be fouled and blocked, and the periodic shutdown and hot washing are frequent. Therefore, it is often necessary to equip a tubular reactor for use.

[0003] However, in the actual application of the existing tubular reactor for granular monoammonium plant, not only the interior is easily blocked by foreign matter, which cannot ensure safe production, but also cannot guarantee that the final nutrient of the product meets 60%, and new tail gas is required at the same time Negative pressure pipelines have a large investment share and a long construction period. At the same time, the temperature inside the tubular reactor cannot be controlled, resulting in a decrease in production efficiency, which is not conducive to practical applications.

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