Production method of ammonium sulfate

A production method and technology of ammonium sulfate, applied in chemical instruments and methods, ammonia compounds, inorganic chemistry, etc., to achieve the effects of increasing production, reducing production costs, and solving excess production of ammonia water

Active Publication Date: 2015-05-27
LIUZHOU IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to provide a kind of method that can use concentrated ammonia water as raw material to produce ammonium sulfate, the production method of this ammonium sulfate can solve the problem that the amount of the ammonia liquor produced by phosphoric acid washing process is greater than the demand of sintering ammonia gas desulfurization process

Method used

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  • Production method of ammonium sulfate

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Embodiment 1

[0019] A kind of production method of ammonium sulfate, use such as figure 1 A kind of ammonium sulfate production equipment shown, this ammonium sulfate production equipment comprises ammonium sulfate production equipment and comprises the saturator 1 that is provided with coke oven gas inlet 101 and coke oven gas outlet 103, in saturator 1 successively arranges There are inter-connected mixing zone 107, spray zone 108 and crystallization zone 109; the coke oven gas inlet 101 of saturator 1 is located on the side wall of the mixing zone 107 of saturator 1, and the coke oven gas outlet 103 of saturator 1 is located in the saturator The top of the mixing zone 107 of 1 is provided with two crystallization solution outlets 106 at the bottom of the crystallization zone 109 of the saturator 1, and the crystallization solution outlet 106 is communicated with the inlet of the crystallization elevated tank 8 through the pipeline and the crystallization pump 6; The outlet is communicat...

Embodiment 2

[0027] The production of ammonium sulfate comprises the following steps:

[0028] A. Coke oven gas and ammonia gas evaporated from coking plant wastewater are sent to the mixing zone of the saturator for mixing, and the mixed gas enters the spray zone of the saturator and is sprayed with a sulfuric acid solution with a concentration of 3%. The reaction gives product a;

[0029] B. The concentration of 15% ammonia water input from the ammonia water output main pipe is 3m 3 The flow rate of / h is introduced into the overflow tank through the conduit, and reacts with the sulfuric acid solution with a concentration of 3% in the overflow tank to obtain product b. The concentration that is sprayed is that the sulfuric acid solution reaction of 3% obtains product c;

[0030] C. The product a obtained by the reaction in step A and the product c obtained by the reaction in step B enter the crystallization zone of the saturator, and the water in the crystallization zone evaporates wit...

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Abstract

The invention discloses a production method of ammonium sulfate, which comprises the following steps: A, reacting coke oven gas and ammonia gas with a sulfuric acid solution in a spray area of a saturator so as to obtain a product a; B, guiding aqueous ammonia into an overflow tank to react with a sulfuric acid solution so as to obtain a product b, and conveying the product b to the inside of the saturator by a small mother liquor circulating pump to react with the sprayed sulfuric acid solution in the spray area of the saturator, so that a product c is obtained; C, feeding the product a and the product c into a crystallization area of the saturator, so that ammonium sulfate in the product a and the product c is gradually crystallized and separated out; D, conveying ammonium sulfate-containing crystallizing liquid to the inside of a crystallizing elevated tank from a crystallizing liquid outlet by a crystallizing pump; and E, conveying the crystallizing liquid in the crystallizing elevated tank to a centrifugal machine to separate, and conveying precipitates obtained by separating to a dryer to dry, so that ammonium sulfate is obtained. According to the invention, an ammonium sulfate product is produced by taking aqueous ammonia produced in the process of ammonia washing implemented by using phosphoric acid as a raw material, so that the problem that aqueous ammonia produced in the process of ammonia washing implemented by using phosphoric acid is surplus is solved.

Description

technical field [0001] The invention relates to the technical field of ammonium sulfate production, in particular to a method for producing ammonium sulfate using coke oven gas produced by ammonia washing with phosphoric acid. Background technique [0002] Coke oven gas is a flammable mixed gas produced in the coking process. Usually, ammonia washing with sulfuric acid and ammonia washing with phosphoric acid are used to purify ammonia in coke oven gas; among them, ammonia washing with sulfuric acid in saturator is used to produce ammonium sulfate. , ammonium sulfate can be directly exported; ammonium phosphate method uses ammonia in coke oven gas to produce ammonia water, which provides nitrogen source for sintering ammonia gas desulfurization, and realizes waste treatment with waste. At present, the production line for purifying ammonia in coke oven gas in Liuzhou Iron and Steel Coking Plant includes three sets of phosphoric acid ammonia washing equipment and one set of sa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01C1/242
Inventor 王伟男邹骏彭光文罗小华谭绍栋邓军生石继东
Owner LIUZHOU IRON & STEEL
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