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Method for regulating nutrients of diammonium phosphate product

A diammonium phosphate and product technology, which is applied in the field of adjusting the nutrition of diammonium phosphate products, can solve problems such as pollution, and achieve the effects of increasing nitrogen content, improving and protecting the environment, and reducing phosphorus content

Active Publication Date: 2012-08-15
WENGFU (GRP) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For diammonium phosphate production plants, it is often necessary to treat the production sewage, and in the process of treatment, the filtered sludge is still a kind of waste residue, although the amount is small, there is also some pollution

Method used

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  • Method for regulating nutrients of diammonium phosphate product

Examples

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Embodiment

[0027] Example: Both series of diammonium phosphate plants of Wengfu (Group) Co., Ltd. adopt this process to adjust the nutrient content of diammonium phosphate products.

[0028] The sewage treated by the sewage treatment station is filtered by a belt filter, and the water content of the sludge is about 11%. After drying in the rotary drying kiln, the water content is reduced to 4%, and it is transported to the feeding place of the device. According to the product analysis sample in the previous hour, the amount of sludge to be added per hour is calculated. After metering, use a manual or a small loader to add the return belt equipped with a belt scale, transport it to the return bucket elevator and enter the granulator together with the system return material, and spray the spray coating granulation together with the return material. In the production process, the specific addition amount is calculated according to the data of the total nutrient analysis of the product per h...

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Abstract

The invention discloses a method for regulating nutrients of a diammonium phosphate product, and relates to diammonium phosphate fertilizer. The method comprises the following steps: removing certain water from the sludge filtered through the sewage treatment, calculating the sludge quantity required to be increased according to the slurry spraying quantity and adding the sludge into the returning charge for producing the diammonium phosphate to regulate the nutrients of the product. The water content removed from the sludge accounts for 7 percent of the total weight of the sludge. By using the method, the nitrogen content of the product can be enhanced, the phosphorus content can be reduced, the qualification rate of the product can be ensured, the sludge can be recovered and the environment can be improved and protected. Therefore, the method is suitable for manufacturer of diammonium phosphate.

Description

technical field [0001] The present invention relates to phosphate fertilizer, more specifically to diammonium phosphate, and in particular to a method for regulating the nutrient content of diammonium phosphate products. Background technique [0002] The national standard of diammonium phosphate stipulates that the available phosphorus content is 45%, the nitrogen content is above 17%, and the total nutrient content is above 64%. If the average nutrient content of the produced product is lower than this standard, the product is unqualified; but if the average nutrient content of the produced product is too much higher than this standard, it will cause high acid consumption and ammonia consumption of the product, which will affect the production cost. Therefore, it is necessary to adjust the operation index to control the change of product nutrition, so that it is within the normal range, so as to maximize the profit of the product. The main measure commonly used to adjust n...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05B7/00
Inventor 张红映徐春刘显波肖升代光元游学华李伟
Owner WENGFU (GRP) CO LTD