Deep dehydration closed acid scrubbing purification process

A deep dehydration and purification process technology, applied in the direction of inorganic chemistry, sulfur compounds, sulfur trioxide/sulfuric acid, etc., can solve the problem of large gas flow and achieve the effect of ensuring water balance

Inactive Publication Date: 2018-10-02
ANHUI NARADA RENEWABLE RESOURCE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The characteristics of these flue gases are that the concentration of sulfur dioxide fluctuates from 2 to 5%, and the gas flow rate is large. The conventional acid production process is difficult to meet the requirements. It is necessary to improve the purification process and dehydrate the gas deeply to meet the production of concentrated sulfuric acid, fuming acid or refined Sulfuric acid requirements

Method used

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  • Deep dehydration closed acid scrubbing purification process

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Effect test

Embodiment 1

[0017] see figure 1 , the invention belongs to the technical field of chemical production, and is applicable to regenerated lead, molybdenum concentrate, etc. containing SO 2 The gas purification section for the production of sulfuric acid from smelting flue gas.

[0018] After the smelting flue gas of secondary lead and molybdenum concentrate is subjected to dry dust removal, the flue gas exiting the dry dust removal equipment is cooled and dehydrated by the first-level power wave scrubber, gas scrubber, second-level power wave scrubber, and deep gas cooling tower. And electric demister, after removing water mist, water droplets, acid mist, dust, etc., go to the dry suction section of sulfuric acid production.

[0019] In the present invention, the moisture in the furnace gas in the sulfuric acid production and purification section is deeply cooled, changed from a gaseous state to a liquid state, and discharged out of the system along with the dilute acid, which ensures the ...

Embodiment 2

[0040] Molybdenum concentrate flue gas, gas volume 33000Nm 3 / h, temperature 250 degrees. Entering the first-stage dynamic wave scrubber, the gas composition is shown in Table 5:

[0041] table 5

[0042] Element

Volume fraction%

Gas volume kmol / h

Air volumekg / h

Capacity Nm 3 / h

SO 2

2.85

41.98660714

2687.142857

940.5

SO 3

0.1

1.473214286

117.8571429

33

CO 2

0

0

0

0

h 2 o

11

162.0535714

2916.964286

3630

O 2

12

176.7857143

5657.142857

3960

N 2

73.4

1081.339286

30277.5

24222

total

100

1473.214286

41656.60714

33000

[0043] Enter the gas scrubber at 62 degrees, and the gas composition is shown in Table 6:

[0044] Table 6

[0045] Element

Volume fraction%

Gas volume kmol / h

Air volumekg / h

Capacity Nm 3 / h

SO 2

2.5499

41.9866

2687....

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Abstract

The invention disclose a deep dehydration closed acid scrubbing purification process, belongs to the technical field of chemical production, and is suitable for the gas purification section for producing sulfuric acid from metallurgical off-gas containing SO2 of regenerated lead, molybdenum concentrates and the like. The metallurgical off-gas of the regenerated lead, the molybdenum concentrates and the like is subjected to dry dedusting, and the flue gas flowing out of dry dedusting equipment is processed by a first-level dynamic wave scrubber, a gas scrubbing tower and a second-level dynamicwave scrubber, is cooled and dehydrated, and is processed by an electrostatic mist precipitator to remove water mist, water drops, acid mist, dust and the like, and then goes to the dry absorption section in the production of the sulfuric acid. The water in a furnace gas of the sulfuric acid production and purification section is deeply cooled, is turned from the gas state to the liquid state, andis discharged out of a system along with the dilute acid, the water balance of an acid making system is guaranteed, and the acid making system produces the concentrated sulfuric acid, the fuming acidor the refined sulfuric acid.

Description

technical field [0001] The invention relates to the technical field of regenerated lead, in particular to a closed pickling purification process of deep dehydration, which is suitable for regenerated lead, molybdenum concentrate, etc. containing SO 2 The gas purification section for the production of sulfuric acid from smelting flue gas. Background technique [0002] With the development of the automobile industry and the popularity of electric bicycles, a large number of waste lead-acid batteries need to be recycled. The lead-acid battery is disassembled and separated, and the lead paste in it is recycled into lead products through pyrometallurgy. During the smelting process, a large amount of flue gas containing sulfur dioxide is produced. Molybdenum concentrate is calcined in a rotary kiln during production, which also produces a large amount of flue gas containing sulfur dioxide. The characteristics of these flue gases are that the concentration of sulfur dioxide fluct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D50/00B01D53/50B01D53/78B01D53/00C01B17/74C01B17/90
CPCB01D50/00B01D53/002B01D53/50B01D53/78C01B17/74C01B17/90
Inventor 吴国庆朱保义刘乾刘汉
Owner ANHUI NARADA RENEWABLE RESOURCE TECH CO LTD
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