Optimization method and optimization device for phosphoric acid production process

Abstract

The invention provides an optimization method and an optimization device for a phosphoric acid production process. The optimization method comprises the following steps: constructing a production unitmechanism model for each device of a semi-water reaction process, a primary solid-liquid separation process, a crystal form conversion process and a secondary solid-liquid separation process, constructing a full-process production operation optimization model under constraint conditions by taking the maximum economic benefit as an optimization target, taking the operation parameters as decision variables, and solving the optimization model to obtain an optimal decision variable, thereby fully exerting the potential of the existing production process, improving the overall economic benefit ofan enterprise, and having important practical significance for improving the production operation level of the whole process.

Description

technical field [0001] The invention relates to the technical field of phosphoric acid production, in particular to an optimization method and an optimization device for a phosphoric acid production process. Background technique [0002] Phosphoric acid is an important chemical raw material, not only the main raw material for high-concentration fertilizers, but also an intermediate raw material for the manufacture of various fine phosphate products. Phosphoric acid production process can be divided into wet phosphoric acid and thermal phosphoric acid. Due to the high energy consumption and high production cost of the thermal phosphoric acid process, the wet phosphoric acid process is mainly used at home and abroad to treat phosphorus concentrate. [0003] The wet phosphoric acid process can be divided into semi-water method, dihydrate method, semi-water-dihydrate method and dihydrate-semi-water method. Among them, the dihydric method occupies a leading position in my count...

AI Technical Summary

Problems solved by technology

[0005] However, due to the lack of in-depth understanding of the acidolysis mechanism, crystallization and hydration phase transition laws in the hemihydrate-dihydrate recrystallization process, the current production operations, control and decision-making of the entire process still largely rely on knowledge and experience, resulting in High cost, low efficiency, large resource and energy consumption, unstable product quality and other issues, the simulation and optimization of the production process is the core to solve the current problem of low resource utilization and difficult control in the phosphoric acid industry

[0006] At present, the energy saving and optimization of phosphoric acid production process at home and abroad are mainly focused on single equipment or a single process to solve local optimization and control problems, such as the simulation of phosphoric acid reaction tank and crystallization process and equipment optimization, and overall planning has not been widely implemented The system setting method of resources, energy utilization and process parameters, which only considers a single equipment or process, only obtains a local optimization plan, which is difficult to guarantee the overall optimal balance effect, and obviously cannot support enterprises to achieve the minimum production cost, that is, the maximum economic benefit needs

Images