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Granulator comprising double tubular reactors and application thereof in diammonium phosphate production

A tubular reactor, diammonium phosphate technology, applied in the direction of ammonium orthophosphate fertilizer, application, phosphate, etc., to prolong the service life of equipment, reduce unit cost, and avoid wear and tear

Active Publication Date: 2015-08-26
HUBEI LIUGUO CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the form of single-pipe reverse double nozzles cannot solve the problem of excessive pipe back pressure when the spraying volume is large; therefore, the method of adding a new tube reverse is adopted, double-pipe reverse double nozzles are sprayed and granulated, and a set of nozzles is added at the same time Ammonia distributor for secondary ammoniation of the two shotcrete points

Method used

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  • Granulator comprising double tubular reactors and application thereof in diammonium phosphate production
  • Granulator comprising double tubular reactors and application thereof in diammonium phosphate production

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A granulator with double tubular reactors, the upper part of the granulator is provided with a girder, and a tubular reactor is respectively installed on the two pairs of sides of the granulator, that is, No. 1 tubular reactor and No. 2 tubular reactor In the first tubular reactor, the ammonia distributor is inserted into the material layer of the granulator through the "plow" steel parts welded on the girder, and the end of the first tubular reactor installed outside the granulator is equipped with a liquid Ammonia feed pipe; the No. 2 tubular reactor is welded on the girder "plow type" steel parts to insert the ammonia distributor into the material layer of the granulator, and the end of the No. 2 tubular reactor set outside the granulator is installed with The liquid ammonia delivery pipe; the washing liquid circulation tank is respectively connected to the upper part of the No. 1 tubular reactor and the No. 2 tubular reactor through the tubular reactor feeding pump. ...

Embodiment 2

[0039] The granulator with double-tube reactor is applied to the production of diammonium phosphate. The specific production method is as follows:

[0040]The washing liquid from the washing liquid circulation tank (the washing liquid mainly contains 40% phosphorus pentoxide) is transported to the No. 1 tubular reactor and the No. 2 tubular reactor through the feeding pump respectively, and reacts with liquid ammonia to produce ammonium phosphate The slurry and the ammonium phosphate slurry are sprayed on the inner material curtain of the granulator through the No. 1 nozzle and the No. 2 nozzle respectively. The granulator performs granulation through stock transfer, and after drying, sieves to obtain 2-4mm particles, then cools and packs to obtain the finished product of diammonium phosphate.

[0041] Among them, the spray volume of No. 1 nozzle and No. 2 nozzle is controlled to 20m 3 / h, the internal control pressure of No. 1 tubular reactor is 380KPa, and the internal con...

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Abstract

The invention provides a granulator comprising double tubular reactors. A main beam is arranged on the upper part of the granulator. A No.1 tubular reactor and a No.2 tubular reactor are respectively arranged on the two opposite sides of the granulator. According to the No.1 tubular reactor, an ammonia distributor is inserted into a granulator feed layer through a plow-type steel part welded on the main beam. A liquid ammonia delivery pipe is arranged on the end of the No.1 tubular reactor positioned on the outer side of the granulator. According to the No.2 tubular reactor, an ammonia distributor is inserted into a granulator feed layer through a plow-type steel part welded on the main beam. A liquid ammonia delivery pipe is arranged on the end of the No.2 tubular reactor positioned on the outer side of the granulator. A washing liquid circulation tank is respectively connected to the upper parts of the No.1 tubular reactor and the No.2 tubular reactor through tubular reactor feeding pumps. The working pressure of the equipment is lower than that of single tubular reactors. A blocking frequency is substantially reduced. Single tubular reactor purging frequency is reduced to once per shift. A cylinder scale phenomenon close to a spray point is inhibited.

Description

technical field [0001] The invention relates to a novel granulator applied to diammonium phosphate, specifically a granulator containing double-tube reactors, which is applied to the granulation of diammonium phosphate. Background technique [0002] Hubei Liuguo Chemical Co., Ltd.'s annual output of 240,000 tons of 64% nutrient diammonium phosphate plant was completed and put into operation on September 18, 2012, and reached the production and standard in early 2013. In order to increase the production capacity of the device and reduce the production cost per ton, the factors restricting the production capacity of the device must be modified. [0003] The original production process uses a single tubular reactor (referred to as tube reactor) for secondary ammoniation spray granulation. In the process of increasing production capacity, increasing the system load will lead to fouling of tube reactor nozzles, increased tube counter pressure, primary ammonia and The flow of was...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/28C05B7/00
Inventor 韩帆陈宇刘延
Owner HUBEI LIUGUO CHEM IND
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