Treatment method and treatment system for ammoniated pelleting compound fertilizer tail gas

A treatment method and compound fertilizer technology, which are applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of not meeting the environmental protection objectives of production tasks, reducing environmental protection emission indicators, and low ammonia solubility, and achieving a good society. Benefit, Complaint Reduction, Effect of Reducing Ammonia Consumption

Inactive Publication Date: 2013-01-23
山东聊城鲁西化工第五化肥有限公司
View PDF3 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The method of treating tail gas by using water washing method disclosed in the above-mentioned patent is suitable for the treatment of tail gas of spray granulation compound fertilizer. Low, the method of washing with water is not applicable
[0005] In addition, as the environmental protection situation becomes more severe, the e

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Treatment method and treatment system for ammoniated pelleting compound fertilizer tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for treating tail gas of ammoniated granulated compound fertilizer, comprising the following process steps:

[0035] (1) 50000m per hour 3 Containing NH at a temperature of 60°C 3 The amount of 80 kg of dry tail gas is transported to two parallel cyclone dust collectors for cyclone dust removal, and then enters the first venturi tube;

[0036] (2) put 20m 3 Phosphoric acid aqueous solution with a mass concentration of phosphorus pentoxide of 20% is pumped into the first venturi tube by the first circulation pump from the first washing liquid tank, and is sprayed out through the nozzle in the first venturi tube to dry the tail gas. Washing, using phosphoric acid to absorb ammonia in the tail gas so that the pH of the washing solution is ≤ 1;

[0037] (3) The exhaust gas and washing liquid after washing are recycled to the first washing liquid tank; the amount of ammonia discharged from the drying tail gas after absorption is 20 kg / hour, and the gas that meets...

Embodiment 2

[0046] A method for treating tail gas of ammoniated granulated compound fertilizer, comprising the following process steps:

[0047] (1) 70000m per hour 3 Containing NH at a temperature of 80°C 3 The amount of 90 kg of dry tail gas is transported to two parallel cyclone dust collectors for cyclone dust removal, and then enters the first venturi tube;

[0048] (2) put 20m 3 Phosphoric acid aqueous solution with a mass concentration of phosphorus pentoxide of 20% is pumped into the first venturi tube by the first circulation pump from the first washing liquid tank, and is sprayed out through the nozzle in the first venturi tube to dry the tail gas. Washing, using phosphoric acid to absorb ammonia in the tail gas so that the pH of the washing solution is ≤ 1;

[0049] (3) The exhaust gas and washing liquid after washing are recycled to the first washing liquid tank; the amount of ammonia discharged from the drying tail gas after absorption is 20 kg / hour, and the gas that meets t...

Embodiment 3

[0058] A method for treating tail gas of ammoniated granulated compound fertilizer, comprising the following process steps:

[0059] (1) 100000m per hour 3 Containing NH at a temperature of 90°C 3 The amount of 100 kg of dry tail gas is transported to two parallel cyclone dust collectors for cyclone dust removal, and then enters the first venturi tube;

[0060] (2) put 20m 3 Phosphoric acid aqueous solution with a mass concentration of phosphorus pentoxide of 20% is pumped into the first venturi tube by the first circulation pump from the first washing liquid tank, and is sprayed out through the nozzle in the first venturi tube to dry the tail gas. Washing, using phosphoric acid to absorb ammonia in the tail gas so that the pH of the washing solution is ≤ 1;

[0061] (3) The exhaust gas and washing liquid after washing are recycled to the first washing liquid tank; the amount of ammonia discharged from the drying tail gas after absorption is 20 kg / hour, and the gas that mee...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a treatment method and a treatment system for ammoniated pelleting compound fertilizer tail gas. The tail gas treatment method provided by the invention comprises the following steps of: simultaneously adding phosphoric acid and tail gas in a drying working section to a venturi tube; using phosphoric acid to wash ammonia in the tail gas; emptying the tail gas, and punching washing liquid into a pelleting working section, so as to react with pelleting tail gas in a pelleting working section venturi tube; performing secondary water washing due to high ammonia content in the pelleting tail gas; emptying the tail gas after ammonia content of the tail gas is qualified; and punching the washing liquid into a potassium hydride process to reuse. The tail gas treatment system provided by the invention comprises a drying tail gas working section and a pelleting tail gas working section. Ammonia discharge amount of the tail gas is reduced to be 20 kg per hour from 50-60 kg per hour, thereby being greatly lower than a national emission standard; the ammoniated pelleting compound fertilizer tail gas is discharged after reaching the standard, thereby reducing complaints from surrounding residents and creating a good social benefit; absorbed ammonia can be recycled, so that ammonia consumption is reduced, and production is more stable; the washing liquid is recycled without waste liquid, and is economical and practicable.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing compound fertilizer tail gas and a treatment system thereof, in particular to a method for treating tail gas generated in the production process of ammoniated granulation to produce sulfur-based compound fertilizers and a treatment system thereof. Background technique [0002] In 2010, Shandong Liaocheng Luxi Chemical Fifth Fertilizer Co., Ltd. completed a set of ammonification granulation production equipment for sulfur-based compound fertilizers after transformation and construction, and carried out trial production. The tail gas of ammoniated granulation compound fertilizer is divided into two parts, one part is drying tail gas with a small amount of ammonia, and the other part is granulation tail gas with higher ammonia content. In the production process, in order to produce high-nitrogen compound fertilizers, secondary neutralization is required at the granulation station to increase ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01D53/78B01D53/58
CPCY02A50/20
Inventor 孙海兵王广辉陈春良吕保国郎子国
Owner 山东聊城鲁西化工第五化肥有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap