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Method for guaranteeing safety of drying system in sulfur phosphate fertilizer production

A drying system and safe technology, which can be used in drying solid materials, drying gas layout, drying, etc., and can solve problems such as explosion, spontaneous combustion, and danger.

Active Publication Date: 2012-04-25
WENGFU (GRP) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the material stays for a long time during this period, when the flue gas at 350°C ~ 650°C is used as the drying heat source, the elemental S in the material will melt due to high temperature (the boiling point of sulfur is 444.6°C) and evaporate into sulfur vapor , may cause spontaneous combustion, combined with the dust in the material, it is very likely to cause an explosion, so the drying system is the most dangerous link

Method used

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  • Method for guaranteeing safety of drying system in sulfur phosphate fertilizer production
  • Method for guaranteeing safety of drying system in sulfur phosphate fertilizer production
  • Method for guaranteeing safety of drying system in sulfur phosphate fertilizer production

Examples

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Embodiment

[0073] Both series of diammonium phosphate plants of Wengfu (Group) Co., Ltd. adopt this process for the production of sulfur-containing phosphate fertilizers. The implementation steps are as follows:

[0074] 1. When the diammonium phosphate plant is producing sulfur-containing phosphate fertilizers (single S and combined S each account for 5%), before the system starts spraying normally, first ensure that the inlet temperature of the dryer is lower than 250°C, and the inlet temperature is controlled by the load of the hot blast stove ;

[0075] 2. Then open the steam spraying system at the inlet of the dryer, let in steam, eliminate the sparks brought by the hot air system in the flue, extinguish the fire source, and then start the system spraying operation. As long as the simple substance S and the material are fully mixed, the surface of the material will The temperature is at most 95°C;

[0076] 3. The moisture inlet of the material is controlled within 3...

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Abstract

The invention discloses a method for guaranteeing safety of a drying system in sulfur phosphate fertilizer production. the method comprises the following measures: firstly, a vapor spraying system is respectively arranged in a drying machine and all belt conveyers, in particular at a material entrance of a D-shaped tube of the drying machine; secondly, three directional blasting safety holes are arranged at both sides of each belt conveyer, and vapor pipelines are added at the safety holes; vapor pipelines and fire control water pipes are added on crushers, material conveying chutes and the top of a cyclone dust collector, so as to guarantee safety in emergency; thirdly, a vapor spraying device is added on a fan cleaning gate. The method can be used for guaranteeing the security of sulfur in sulfur fertilizer production and is a controllable scheme which meets production process indexes by increasing the humidity of a heat exchange furnace gas, decreasing the temperature of heat exchange, extinguishing sparks in flue gas and taking other methods.

Description

technical field [0001] The invention relates to fertilizer production, in particular to a method for producing sulfur and phosphate fertilizers using a diammonium phosphate device to ensure the safety of a drying system. Background technique [0002] When using diammonium phosphate plant to produce sulfur fertilizer, in addition to adding sulfuric acid containing sulfate radicals into the system to generate combined sulfur, the other part adds elemental sulfur (powdered or liquid sulfur) into the system; because sulfur is a flammable For explosive items, ensuring the safety of the production system has become one of the most important links. In addition, there are very few devices producing sulfur fertilizer in the world, because the risk is too high, especially the import of dryers. [0003] The combined material of elemental sulfur and diammonium products enters the dryer from the feeding port of the material maker, and the first thing it contacts is the D-sha...

Claims

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Application Information

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IPC IPC(8): F26B21/14F26B21/08F26B21/10F26B25/00
Inventor 刘显波徐春肖升王小裕
Owner WENGFU (GRP) CO LTD
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