Method and device for removing SO2 in smoke gas by pyrolusite slurry and resource utilization

A technology of resource utilization and pyrolusite, applied in chemical instruments and methods, separation methods, manganese sulfate, etc., can solve the problems of large investment and energy consumption, loss of ammonia volatilization, high cost, etc., and achieve low operating costs and good economic benefits Effect

Pending Publication Date: 2017-02-08
KUNMING UNIV OF SCI & TECH
View PDF11 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the wet desulfurization technology, although the lime-limestone method is the most mature technology at present, the desulfurization efficiency of this process is high (the desulfurization rate is above 90%), the absorbent is cheap and the source is wide, but its system is complicated, the investment and energy consumption are large, and the production The application value of the waste residue is not great, and it is easy to cause secondary pollution; although the by-products of the ammon

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
  • Method and device for removing SO2 in smoke gas by pyrolusite slurry and resource utilization

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] Such as Figure one As shown, a manganese ore slurry removes SO in flue gas 2 And its resource utilization equipment, including pressurized blower 1, desulfurization tower 2, demister 3, slurry pump I4, circulating pump 5, slurry tank 6, desulfurization slurry storage tank 7, slurry pump II8, vacuum filter I9 , Receiving tank I10, vacuum pump I11, purification tank 12, screw pump 13, filter press 14, neutralization tank 15, clarification sedimentation tank 16, slurry pump III17, vacuum filter II18, receiving tank II19, vacuum pump II20, vacuum evaporator 21. Centrifuge I22, clear liquid pump 23, carbonization tank 24, centrifuge II25, mother liquor tank 26, ammonia pump 27, ammonia distillation tower 28, separator 29, dryer I30, dryer II31; pressurized blower 1 and The lower part of the desulfurization tower 2 is connected, the bottom of the desulfurization tower 2 is equipped with a material box, and the upper part is equipped with a spray device. The ...

Example Embodiment

[0035] Example 2

[0036] The manganese ore slurry in this example removes SO from flue gas 2 And the method of resource utilization, the device adopted is the same as that of Example 1, except that two rows of spray devices are set, and each row is set with 7 nozzles. The specific steps are as follows:

[0037] (1) Wet grind the pyrolusite with a ball mill, pass a 200-mesh sieve, add water in the slurry tank 6 to make a pyrolusite slurry, the solid content of the pyrolusite slurry is 22%, and the pH of the pyrolusite slurry is adjusted to 4;

[0038] (2) The flue gas is the flue gas of the power plant boiler, and the flue gas volume is 100,000Nm 3 / h, SO in flue gas 2 The content is 2000mg / Nm 3 , The average temperature is 120℃, and the flue gas SO is required 2 Less than 400mg / Nm 3 The flue gas with higher temperature first enters the waste heat exchanger to produce low-pressure steam for the evaporation process. After cooling, the flue gas enters from the lower part of the desulfur...

Example Embodiment

[0043] Example 3

[0044] The manganese ore slurry in this example removes SO from flue gas 2 Its resource utilization method uses the same device as that of Embodiment 1. The specific steps are as follows:

[0045] (1) Wet grind the pyrolusite with a ball mill, pass a 200-mesh sieve, and add water in the slurry tank 6 to make a pyrolusite slurry. The solid content of the pyrolusite slurry is 18%, and the pH of the pyrolusite slurry is adjusted to 4.5;

[0046] (2) The flue gas is the flue gas of the sulfuric acid preparation plant, and the sulfuric acid tail gas treatment capacity is 200,000Nm 3 / h, SO in the tail gas of two-rotation and two-absorption sulfuric acid plant 2 Content 650mg / Nm 3 , Tail gas outlet requirements SO 2 Content 100mg / Nm 3 Below, the desulfurization efficiency is more than 85%, and the flue gas with higher temperature first enters the waste heat exchanger to produce low-pressure steam for use in the evaporation process. After cooling, the flue gas enters from ...

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 Method and device for removing SO2 in smoke gas by pyrolusite slurry and resource utilization. Pyrolusite is subjected to wet milling with water added by a ball mill and pH value regulation to prepare pyrolusite slurry; the pyrolusite slurry performs inverse contact reaction with SO2-containing smoke gas in a desulfurizing tower for desulfurization; the smoke gas is subjected to defogging, and then enters the next work procedure; the ore slurry circulation flow process comprises the steps of vacuum filtering, filtering after pH regulation by lime, pH regulation of filter liquid and precipitation in a precipitation pool, vacuum evaporative crystallization and solid-liquid separation, and filter liquid carbonization solid-liquid separation. The pyrolusite slurry is used for removing SO2 in the smoke gas; meanwhile, the SO2 takes oxidation-reduction reaction with manganese dioxide in the pyrolusite to generate manganous sulfate; through the processes of purification, evaporative crystallization, mother liquid carbonization and the like, manganese sulfate monohydrate and manganese carbonate with high added values can be obtained; the SO2 in the smoke gas is controlled; the secondary pollution of the smoke gas is prevented; meanwhile, high-added-value products are generated; meanwhile, the SO2 control problem is solved; the economic benefits are obtained.

Description

technical field [0001] The invention relates to a method for removing SO in flue gas from pyrolusite 2 The method and device for resource utilization thereof, to achieve the purpose of pollution control with raw ore, and to obtain high value-added products at the same time, belong to the technical field of environmental protection. Background technique [0002] Flue gas desulfurization methods can be roughly divided into dry desulfurization and wet desulfurization according to the phase of desulfurization agent. At present, there are more than 200 kinds of flue gas desulfurization technology processes at home and abroad, and there are only more than ten kinds of processes and supporting equipment with industrial application value. Wet desulfurization is the most commonly used because of its simple operation and low cost. In the wet desulfurization technology, although the lime-limestone method is the most mature technology at present, the desulfurization efficiency of this...

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): B01D53/80B01D53/50C01G45/10
CPCB01D53/507B01D53/80C01G45/10B01D2251/608B01D2258/0283B01D2257/302
Inventor 宁平殷梁淘殷在飞张秋林
Owner KUNMING UNIV OF SCI & TECH
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