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A neutralization and concentration device and method for use in the production of monoammonium phosphate

A monoammonium phosphate, production process technology, applied in the direction of phosphate, phosphorus oxyacid, etc.

Active Publication Date: 2022-03-18
YIDU XINGFA CHEM COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to provide an integrated device for neutralizing and concentrating monoammonium phosphate products using raffinate acid to solve the problem of too high concentration of raffinate acid when using raffinate method to produce monoammonium phosphate products. , it is necessary to reduce the technical difficulties of subsequent production after acid concentration, which can save the steam consumption of slurry concentration in the production of monoammonium phosphate products by slurry method, and save a large amount of steam required for slurry concentration every year, and play a role in energy saving and emission reduction purpose, and at the same time realize the efficient recovery and reuse of raffinate

Method used

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  • A neutralization and concentration device and method for use in the production of monoammonium phosphate

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Effect test

Embodiment 1

[0025] Such as figure 1 In connection with the drawings, the present invention is further explained:

[0026] A neutralization and concentrated apparatus for a ammonium phosphate produced, and the reactor 1 is connected to the steam heat exchanger 9, and the steam heat exchanger 9 is connected to the tube reactor 12, and the tube reactor 12 is reacted. The slurry circulation tube 14 is connected to the top of the reactor 1; the upper portion of the reactor 1 is provided with a sucked acid delivery tube 25; the middle of the reactor 1 is transmitted to the high pressure pump conveying tube 24 and the high pressure pump 23 is connected to the powder tower. .

[0027] The upper portion of the reactor 1 is provided with an overflow tube 21, and the overflow tube 21 is disposed at 80-90% levels of the reactor 1 tower body. The overflow tube 21 is open higher than the slurry to high pressure pump conveying tube 24 The insertion of the feeder is inserted into the lower portion 1 / 4-1 / 5 of...

Embodiment 2

[0032] The process carried out using the apparatus described in Example 1 is as follows:

[0033] 40-44% acid concentrated acid was delivered to the reactor tower body 1 by the intravation of the saueric acid delivery conduit 25, and the liquid level gauge 17 showed the liquid level to start the circulation pump 6;

[0034] Through the intravation of the intake gas ammonia to the tubular reactor 12, the sampling analysis is enhanced, and the induction of 0.92 mol / mol is reached. Automatic interlocking, set the amino ratio in the neutralization of 0.95 to 1.02 mol / mol;

[0035] When sampling analysis slurry, the specific gravity is 1.5-1.55, it is not necessary to use itself to concentrate steam heat exchanger 9; directly activate the high pressure pump 23 to transport the slurry to the powder tower, if the specific weight is less than 1.5, turn on the steam valve 10 to use The steam heat exchanger 9 is concentrated, and it is appropriately raised the rare acid or concentrated ...

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Abstract

The invention discloses a device for neutralization and concentration in the production of monoammonium phosphate and a method for using it. Specifically, the bottom of the reactor is connected with a steam heat exchanger through a circulation pump, the steam heat exchanger is connected with a tubular reactor, and the tubular reactor undergoes reaction The slurry circulation pipe is connected to the top of the reactor; the upper part of the reactor is provided with a feeding pipe for raffinate; the middle part of the reactor is connected to the high-pressure pump through the slurry-to-high-pressure pump delivery pipe and then sent to the powder spraying tower. Neutralize raffinate or concentrated phosphoric acid with ammonia gas to obtain monoammonium phosphate slurry that meets the powder spraying index, and then use a high-pressure pump to transport it to the powder spraying tower to obtain monoammonium phosphate products. Solve the technical problem that when using raffinate acid to produce monoammonium phosphate products by slurry method, because the acid concentration of raffinate acid is too high, the acid concentration needs to be reduced before subsequent production can be carried out, which can save the time for producing monoammonium phosphate products by slurry method According to the current raffinate consumption, the steam consumption for slurry concentration can save 43,200 tons of steam per year, and the direct economic benefit of saving steam consumption is 7.78 million yuan.

Description

Technical field [0001] The present invention relates to phosphorus resource recovery, specifically, by simply collapse acidic acid in the wet phosphoric acid purification process (in ensuring 40-44%, the specific gravity is 1.4-1.5), and is sent to the present invention. The device is formed to form an ammonium phosphate and an aerosolite, and an ammonium phosphate that meets the need for an ammonium phosphate is sent to a powder tower to produce an ammonium phosphate. Background technique [0002] During wet phosphoric acid refining production, a large amount of succubic acid is produced, and the quarantine is high, and the multiploidal oxide is high. The general treatment method is to produce a pyrocyte product of the binder. Ammonium phosphate. Since the sucral acid is too high, it is necessary to reduce the neutralization of the acid, then the slurry is concentrated, and an ammonium phosphate is produced, and the acid concentrate is lowered to waste a lot of steam. Inventive...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/28
CPCC01B25/28
Inventor 郑光明邹学勇沈维云刘明高杜万保王宗孝陈春雷黄翔翔汪耀兴
Owner YIDU XINGFA CHEM COMPANY
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