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Process and equipment for producing potassium sulfate compound fertilizer by integrally utilizing tail gas generated in sulphuric acid production

A technology of potassium sulfate compound fertilizer and sulfuric acid production, which is applied in the production process and equipment of compound fertilizer, and in the field of ammonium production of potassium sulfate compound fertilizer. It can solve the problems of ammonium tank expansion and the difficulty of normal production and operation of enterprises, and achieve cost savings. , Convenient manufacturing and processing, and the effect of reducing waste of resources

Active Publication Date: 2010-06-09
山东聊城鲁西化工第五化肥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In order to prevent excessive emission of sulfur dioxide concentration in sulfuric acid and chlorosulfonic acid tail gas, the method of ammonia water absorption is generally adopted to treat the tail gas. Restrictions, unable to sell smoothly, often cause ammonium tanks to expand, bring difficulties to the normal production and operation of the enterprise, and restrict the long-term stable production of the enterprise

Method used

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  • Process and equipment for producing potassium sulfate compound fertilizer by integrally utilizing tail gas generated in sulphuric acid production
  • Process and equipment for producing potassium sulfate compound fertilizer by integrally utilizing tail gas generated in sulphuric acid production
  • Process and equipment for producing potassium sulfate compound fertilizer by integrally utilizing tail gas generated in sulphuric acid production

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Effect test

Embodiment 1

[0038] A process for comprehensively utilizing tail gas from sulfuric acid production to produce potassium sulfate compound fertilizer, comprising the following steps:

[0039] (1) 330,000 m 3 Contains 1950mg / m 3 SO 2 The sulfuric acid tail gas is delivered to the first washing tower 1, and 3m is added to the first washing tower 1 from the ammonia water tank 8 through the ammonia water pump 5 3 Mass concentration is 18% ammoniacal liquor, ammoniacal liquor and the sulfuric acid tail gas in the first washing tower generate the solution that contains ammonium bisulfite and ammonium sulfite, gas is exhausted through the first washing tower 1 chimney, in the first washing tower 1 The mass ratio of the generated ammonium bisulfite to ammonium sulfite is 2.16:1, and the total concentration is 278g / l; after absorption, the tail gas emits SO 2 Concentration 589mg / m 3 .

[0040] (2) will 100,000 m 3 Contains 3000mg / m 3 SO 2 The chlorosulfonic acid tail gas is transported in the...

Embodiment 2

[0048] A process for comprehensively utilizing tail gas from sulfuric acid production to produce potassium sulfate compound fertilizer, comprising the following steps:

[0049] (1) 330,000 m 3 Contains 1850mg / m 3 SO 2 The sulfuric acid tail gas is delivered to the first washing tower 1, and 3m is added to the first washing tower 1 from the ammonia water tank 8 through the ammonia water pump 5 3 Concentration is the ammoniacal liquor of 15%, ammoniacal liquor and the sulfuric acid tail gas in the first washing tower generate the solution that contains ammonium bisulfite and ammonium sulfite, gas is exhausted through the first washing tower 1 chimney, and in the first washing tower 1 The mass ratio of the generated ammonium bisulfite to ammonium sulfite is 2.08:1, and the total concentration is 252g / l; the tail gas SO after absorption 2 Emission concentration 301mg / m 3 .

[0050] (2) will 100,000 m 3 Contains 2600mg / m 3 SO 2 The chlorosulfonic acid tail gas is transporte...

Embodiment 3

[0056] A process for comprehensively utilizing tail gas from sulfuric acid production to produce potassium sulfate compound fertilizer, comprising the following steps:

[0057] (1) 330,000 m 3 Contains 1630mg / m 3 SO 2 The sulfuric acid tail gas is delivered to the first washing tower 1, and 3m is added to the first washing tower 1 from the ammonia water tank 8 through the ammonia water pump 5 3 Concentration is 10% ammoniacal liquor, ammoniacal liquor and the sulfuric acid tail gas in the first scrubber 1 generate the solution that contains ammonium bisulfite and ammonium sulfite, gas is exhausted through the first scrubber 1 chimney, and in the first scrubber 1 The mass ratio of the produced ammonium bisulfite to ammonium sulfite is 2.69:1, and the total concentration is 218g / l; after absorption, the tail gas emits SO 2 Concentration 10mg / m 3 .

[0058] (2) will 100,000 m 3 Contains 1880mg / m 3 SO 2 The chlorosulfonic acid tail gas is transported in the second washing ...

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Abstract

The invention relates to a process and equipment for producing potassium sulfate compound fertilizer by integrally utilizing tail gas generated in sulphuric acid production, belonging to the technical field of fertilizer manufacture. The process comprises the following steps: washing sulphuric acid tail gas and chlorosulfonic acid tail gas with ammonia water; preparing ammonium sulfate by the generated ammonium bisulfite and ammonium sulfite; and producing the potassium sulfate by the prepared ammonium sulfite. The equipment for the process includes a reaction kettle which is communicated with a first washing tower and a second washing tower through a circulating pump and a pipeline, wherein the first washing tower and an ammonia vessel are connected with a sulphric acid tail gas exhaust device; and the second washing tower and the ammonia vessel are connected with a chlorosulfonic acid tail gas exhaust device. The process uses the ammonium bisulfite and the ammonium sulfite generated in the tail gas treatment of sulphuric acid production and chlorosulfonic acid, wherein the sulphric acid is used to decompose the sulfur dioxide generated by the ammonium bisulfite and the ammonium sulfite to reproduce sulphric acid, and the produced ammonium sulfate is applied to the compound fertilizer system for producing the compound fertilizer so as to reduce resource waste and environmental pollution.

Description

technical field [0001] The invention relates to a production process and equipment of compound fertilizer, in particular to a process and equipment for producing potassium sulfate compound fertilizer by using sulfur to make acid and ammonium recovered from chlorosulfonic acid tail gas, and belongs to the field of fertilizer manufacturing technology. Background technique [0002] In order to prevent excessive emission of sulfur dioxide concentration in sulfuric acid and chlorosulfonic acid tail gas, the method of ammonia water absorption is generally adopted to treat the tail gas. Restrictions prevent smooth sales, often causing ammonium tanks to swell, which brings difficulties to the normal production and operation of the company, and restricts the long-term stable production of the company. Contents of the invention [0003] The purpose of the invention is to provide a process for comprehensively utilizing tail gas from sulfuric acid production to produce potassium sulfa...

Claims

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Application Information

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IPC IPC(8): C01D5/04C05G1/06
Inventor 焦延涛吕新春王汝申
Owner 山东聊城鲁西化工第五化肥有限公司
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