Device for producing ammonium sulfate with ammonium bicarbonate as main raw material

Abstract

The invention discloses a device for producing ammonium sulfate with ammonium bicarbonate as a main raw material. The device consists of a hoister, a mixed reaction tank, a slurry delivery pump, a pressure filter, a filter cake belt conveyor, a filtrate delivery pump, a heat exchanger, an axial-flow pump, a crystallizer and a product belt conveyor, wherein the mixed reaction tank, the slurry delivery pump, the pressure filter, the filtrate delivery pump, the heat exchanger, the axial-flow pump and the crystallizer are sequentially connected with one another by pipelines; a material outlet of the hoister is adjacent to the mixed reaction tank; the filter cake belt conveyor is arranged below the pressure filter and is connected with a filter cake outlet of the pressure filter; and the product belt conveyor is arranged below the crystallizer and is connected with a material outlet of the crystallizer. By using the device, an ammonium sulfate product can be produced from ammonium bicarbonate ammonia and phosphogypsum, the energy consumption is low, and the investment is small; and the device realizes product structure adjustment, thus finding a development path for ammonium bicarbonate production industries, finding a utilization way for phosphogypsum generated by phosphorous chemical industries, and meeting the requirements of recycling economy.

Description

technical field [0001] The invention relates to fertilizers containing ammonium salts, in particular to ammonium bicarbonate and ammonium sulfate, and specifically relates to an ammonium sulfate device produced with ammonium bicarbonate as the main raw material. Background technique [0002] Ammonium sulfate is the earliest nitrogen fertilizer produced and used at home and abroad, with a nitrogen content between 20% and 21%. Ammonium sulfate is widely used in agriculture, metallurgy, medicine, leather, wood preservation, textile, electroplating and other industries. It is used as an acidic fertilizer in agriculture, and can be used as top dressing, base fertilizer, and seed fertilizer. [0003] Ammonium bicarbonate was once widely used as nitrogen fertilizer, but it has obvious disadvantages, mainly low fertilizer efficiency, easy to volatilize, easy to agglomerate, difficult to store and not suitable for long-distance transportation. In recent years, under the impact of ...

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Problems solved by technology

Its use is not only partially used as raw materials for phosphogypsum boards, cement retarders, phosphogypsum bricks, etc., but the recycling rate is currently less than 20%, and the storage pressure is extremely high, which seriously restricts the development of the phosphorus chemical industry. Therefore, the use of phosphogypsum It is imperative to adjust the product structure

These devices have their own characteristics, but so far there is no patent for a process and a device for producing ammonium sulfate with ammonium bicarbonate, ammonia and phosphogypsum as raw materials

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