Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Process for performing ammonium sulfite pulping by using sulfur-containing flue gas absorber

A technology of ammonium method and absorbent, applied in the field of recycling technology, can solve the problems of low economic added value, waste pollutants, low absorption rate, etc., achieve high economic value, reduce degradation, and increase pulping yield

Active Publication Date: 2012-10-03
SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, what this method obtains must be a mixed product of ammonium sulfite and other substances, which needs further processing, and must also have material loss and other waste pollutants.
[0005] At present, there are many desulfurization methods for exhaust gas, but most of them generate ammonium sulfate with very low economic added value and are used to prepare chemical fertilizers
In addition, in the process of absorbing smoke, there is also the problem of low absorption rate.

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
  • Process for performing ammonium sulfite pulping by using sulfur-containing flue gas absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The flue gas is firstly dedusted by the electrostatic precipitator, and after the dedusted flue gas is pressurized by the induced draft fan, the amount of flue gas entering the induced draft fan is 310800m 3 / h, the flue gas enters the liquid collection tank at the bottom of the desulfurization tower, sprays excess ammonia water and reacts with sulfur dioxide to form ammonium sulfite and ammonium bisulfite. A mixture of ammonium bisulfite and ammonium sulfite ammonia is formed in the liquid collection tank. The mixture is pumped to the height of the tower and sprayed downward through the three-layer spray device in the middle of the tower. The gas is evenly mixed to absorb the residual sulfur dioxide in the flue gas. Ammonium bisulfite in the mixture reacts with sulfur dioxide to obtain ammonium sulfite and returns to the liquid collection tank. Such repeated cycles will completely absorb the sulfur dioxide in the flue gas. The temperature in the desulfurization tower...

Embodiment 2

[0062] The flue gas first passes through the filter and dust removal equipment for dust removal. After the dust removal flue gas is pressurized by the induced draft fan, the amount of flue gas entering the induced draft fan is 200,000~400,000m 3 / h, into the liquid collection tank at the bottom of the desulfurization tower, spraying excess ammonia water with a concentration of 0.8-11% to react with ammonium bisulfite to generate ammonium sulfite. A mixture of ammonium bisulfite and ammonium sulfite ammonia is formed in the liquid collection tank, and the mixture is pumped to the height of the tower, and sprayed downward through the second-layer spray device in the middle of the tower, and the upward smoke The gas is evenly mixed to absorb the residual sulfur dioxide in the flue gas. Ammonium bisulfite in the mixture reacts with sulfur dioxide to obtain ammonium sulfite and returns to the liquid collection tank. The temperature in the desulfurization tower is 90-120°C; the pre...

Embodiment 3

[0076] The flue gas is firstly dedusted by the electrostatic precipitator, and after the dedusted flue gas is pressurized by the induced draft fan, the intake volume of the induced draft fan is 305,000-400,000m 3 / h, the flue gas enters the liquid collection tank at the bottom of the desulfurization tower, sprays excess ammonia water and reacts with sulfur dioxide to form ammonium sulfite and ammonium bisulfite. A mixture of ammonium bisulfite and ammonium sulfite ammonia is formed in the liquid collection tank. The mixture is pumped to the height of the tower and sprayed downward through the three-layer spray device in the middle of the tower. The gas is evenly mixed to absorb the residual sulfur dioxide in the flue gas. Ammonium bisulfite in the mixture reacts with sulfur dioxide to obtain ammonium sulfite and returns to the liquid collection tank. Such repeated cycles will completely absorb the sulfur dioxide in the flue gas. The temperature in the desulfurization tower is...

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 relates to a process for performing ammonium sulfite pulping by using a sulfur-containing flue gas absorber, which comprises the following steps: (1) performing desulphurization on flue gas by using ammonia water, wherein the flue gas is sulfur-containing flue gas; and (2) performing ammonium sulfite pulping during papermaking by using sulfurous acid mixed solution obtained after the desulphurization. In the process, a high-efficiency flue gas absorption system is adopted; the obtained ammonium sulfite is used for ammonium sulfite pulping in papermaking industry; and heavy contaminated condensate produced by pulping can also be used for absorbing sulfur dioxide in the flue gas. The scheme of the invention not only minimally reduces the environmental pollution, but also recycles the resources. The process is particularly suitable to be used in a paper mill with a self-owned power plant.

Description

technical field [0001] The invention relates to a recycling process, in particular to a treatment method using industrial flue gas, and more specifically, to a process of using sulfur-containing flue gas absorbers to carry out pulping by the ammonium method. Background technique [0002] As we all know, coal-fired boilers or thermal power plants produce a large amount of flue gas, which contains SO 2 , SO and other harmful substances have seriously damaged the earth environment on which human beings depend and endangered people's health. Therefore, various methods for treating and absorbing coal-burning flue gas have emerged as the times require, among which the alkaline method is more effective, and the alkaline method mostly uses ammonia for absorption. [0003] For example, patent application 200310115522 discloses a method for desulfurizing flue gas with ammonium sulfite and ammonium bisulfite solution, which uses ammonia to adjust the pH value in the desulfurization to...

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
Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/14B01D53/78B01D53/50B01D53/96D21C11/02D21C7/00
Inventor 李洪法李玉林杨吉慧王延军贾明昊
Owner SHANDONG FUYIN PAPER & ENVIRONMENTAL PROTECTION TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com