CN1236730A - Process and apparatus for purifying raw gas of sulfuric acid - Google Patents
Process and apparatus for purifying raw gas of sulfuric acid Download PDFInfo
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- CN1236730A CN1236730A CN 99113614 CN99113614A CN1236730A CN 1236730 A CN1236730 A CN 1236730A CN 99113614 CN99113614 CN 99113614 CN 99113614 A CN99113614 A CN 99113614A CN 1236730 A CN1236730 A CN 1236730A
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- water
- tower
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Abstract
A process for removing the acidic fog and dust from raw gas of sulfuric acid charge gas is disclosed, which is conducted in the disclosed apparatus that is composed of corrugated sheet normalized filler tower, plate-type heat exchanger, circulating pump and circulating tank. Its advantages include high fog and dust removing rate up to 99.9% or higher, less investment in apparatus, low pressure drop, and low consumption of energy.
Description
The invention belongs to the gas washing in SA production technical field, relate to the purification process and the device of raw gas of sulfuric acid, relate in particular to technology and the device of removing acid mist and dust in the raw gas of sulfuric acid.
As everyone knows, the unstripped gas that is adopted in vitriolic production generally all derives from the roasting of sulfurous iron ore or the waste gas of non-ferrous metals smelting works, and no matter any unstripped gas all contains 0.1～10.0g/m
3About acid mist, 0.1～10g/m
3About the water vapor of dust and 10～20% (v/v%), must carry out just being sent to subsequent processing after the purifying treatment.At present, general production equipment all adopts the method for electric precipitation and electric demist, and this method exists very significant disadvantage: (1) facility investment is big, and a flue gas treatment capacity is 60000Nm
3The refining plant of/h, its facility investment expense are about about 1,000 ten thousand yuan of Renminbi, and (2) systemic resistance is big, is about 600mmH
2The O post, thus energy consumption is increased.(3) volume of equipment is big, and floor space is big, also needs attached high voltage supply system.
The objective of the invention is to disclose the technology and the device of acid mist and dust in a kind of new purification raw gas of sulfuric acid, to overcome the above-mentioned shortcoming of existing in prior technology.
Design of the present invention is such:
With water is the washing, purifying medium, unstripped gas in packing tower with the water counter current contact, raw material gas purifying process in the condensation of water vapour is carried out, the water droplet that produces in the condensation process will be at first attached to the surface of acid mist particle and dust particle, the particle diameter of acid mist particle and dust particle can increase to 2.0～3.0um by 0.5～1.0um, the liquid film of inertial impaction filling surface repeatedly repeatedly can greatly improve demist and dust separating effect then.
According to above-mentioned design, the present invention has researched and developed the technology and the device of acid mist and dust in a kind of new purification raw gas of sulfuric acid, will do detailed elaboration to the present invention by accompanying drawing below.Fig. 1 is a schema.Among the figure:
The 1----packing tower
The 2----interchanger
The 3----recycle pump
The 4----circulation groove
The unstripped gas that contains acid mist and dust, its temperature is 60～70 ℃, at first enter the bottom of packed tower 1, with temperature from heat exchanger 2 be 20～40 ℃ purification medium-water counter current contacting, unstripped gas is cooled, part steam in the unstripped gas is condensed, and acid mist and dust are removed in unstripped gas and purification medium-water counter current contacting, unstripped gas after the purification is flowed out by the top of packed tower 1, be sent to rear operation, its sulphuric acid mist content can be less than 5mg/Nm3, purifying rate can reach more than 99.9%, and dirt content also can be less than 5mg/Nm3, purifying rate can reach 99.99%, Purification medium-the water that has absorbed acid mist and dust is then flowed out by the bottom of packed tower 1, enters circulating slot 4, temperature Be 30～60 ℃, part is processed by the bottom of circulating slot 4 discharging decontaminated water, and part is sent to water by circulating pump 3 Heat exchanger 2 is taken away heat by cooling water, and temperature is reduced to 20～40 ℃, again enters filler 1 and recycles, and purifies Medium-water can enter system by the packed tower upper supplementary. Its process conditions are such: the unstripped gas temperature is 60～70 ℃, the unstripped gas time of staying is 5～15 seconds, and the temperature that enters the circulatory mediator-water on absorption tower is 20～40 ℃, cooling water temperature is 15～30 ℃, and empty tower gas velocity is 1.0～2.0m/s, sprinkle density is 10～30m3/m
2·h。
The said technology of the present invention can be by packed tower 1, heat exchanger 2, circulating pump 3 and 4 structures of circulating slot Carry out in the device that becomes. Filler in the said packed tower 1 can preferably adopt corrugated plate regular packing, with poly-third Alkene or stainless steel are the 150X～250X type the best of material.
Said heat exchanger 2 can adopt the plate type heat exchanger with high heat transfer coefficient, to reduce the consumption of cooling water With the outlet temperature that reduces purification medium-water.
As seen from the above technical solution, the said method of the present invention has numerous advantages:
(1) good purification, demist rate can reach more than 99.9%, and dust removal efficiency can reach more than 99.99%;
(2) facility investment expense is low, and for identical treatment capacity, facility investment only is 25% of an electric removal apparatus;
(3) pressure drop is little, and energy consumption is low, process cost only be identical treatment capacity the electric precipitation method 25%;
(4) floor space is little, reaches effect same, only is 25% of electric precipitation method.
To relevant details of the present invention be further described by embodiment below.
Handle the smelting waste gas of non-ferrous metals smelting works with said technology of the present invention and device.
Processing parameter and equipment size are as follows:
Unstripped gas treatment capacity: 600m
3/ h
Unstripped gas temperature: 65 ℃
Unstripped gas particle concentration: 1.5g/m
3
Unstripped gas acid mist content: 1.5g/m
3
Unstripped gas water vapour content: 15% (v/v%)
Specific liquid rate: 20m
3/ m
2H
Purification medium-water temp: 40 ℃
Absorption tower: φ 400 * 14500mm
Packed height: 5m * 2 are 10m altogether
Filler model: 250X Polypropylene Plate Corrugated Packing
Result is as follows:
Exhaust gas particle concentration: 0.1mg/m
3Exhaust gas acid mist content: 0.1mg/m
3
Pressure drop: 1.3Kpa
Claims (5)
1. the purification process of a raw gas of sulfuric acid is characterized in that:
(1) contains the unstripped gas of acid mist and dust, at first enter the bottom of packing tower (1), and from interchanger (2)
The contact of purification medium-water, the unstripped gas after the purification is flowed out by the top of packing tower (1), has absorbed
Purification medium-the water of acid mist and dust is then flowed out by the bottom of packing tower (1), enters circulation groove (4),
By recycle pump (3) water is sent to from interchanger (2), enters filler (1) circulation after the reduction temperature once more and make
With;
(2) its processing condition are such: the unstripped gas residence time is 5～15 seconds, enters following of absorption tower (1)
The temperature of ring medium-water is 20～40 ℃, and empty tower gas velocity is 1.0～2.0m/s, and specific liquid rate is
10～30m
3/m
2·h。
2. technology as claimed in claim 1 is characterized in that: part purification medium-water is by the bottom discharging of circulation groove (4), and part is sent to interchanger (2) by recycle pump (3) with water.
3. technology as claimed in claim 2 is characterized in that: purification medium-water can enter system by the upper supplementary of packing tower (1).
4. the purification process device of a raw gas of sulfuric acid is characterized in that: said device main stuffing tower (1), change
Hot device (2), recycle pump (3) and circulation groove (4) are formed:
Filler in the said packing tower (1) is a corrugated plate regular packing;
Said interchanger (2) is a plate-type heat exchanger.
5. device as claimed in claim 4 is characterized in that: said filler is that polypropylene or stainless steel are the 150X～250X type structured packing of material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113614A CN1085187C (en) | 1999-04-07 | 1999-04-07 | Process and apparatus for purifying raw gas of sulfuric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113614A CN1085187C (en) | 1999-04-07 | 1999-04-07 | Process and apparatus for purifying raw gas of sulfuric acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1236730A true CN1236730A (en) | 1999-12-01 |
| CN1085187C CN1085187C (en) | 2002-05-22 |
Family
ID=5276788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99113614A Expired - Fee Related CN1085187C (en) | 1999-04-07 | 1999-04-07 | Process and apparatus for purifying raw gas of sulfuric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1085187C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830443A (en) * | 2010-04-14 | 2010-09-15 | 清华大学 | Process for purifying sulfuric acid phase and hydriodic acid phase in iodine-sulfur cycle |
| CN103429313A (en) * | 2011-02-01 | 2013-12-04 | 琳德股份公司 | Process for removing contaminants from gas streams |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3326561C2 (en) * | 1983-07-22 | 1986-05-22 | Bayer Ag, 5090 Leverkusen | Process for the treatment of used sulfuric acid |
| CN1056824A (en) * | 1990-05-29 | 1991-12-11 | 北京工业大学 | The process for purifying of dust, acid mist, acid gas mix waste gas |
| CN2168638Y (en) * | 1993-06-10 | 1994-06-15 | 吴康地 | Sour fog gas-liquid separator |
-
1999
- 1999-04-07 CN CN99113614A patent/CN1085187C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830443A (en) * | 2010-04-14 | 2010-09-15 | 清华大学 | Process for purifying sulfuric acid phase and hydriodic acid phase in iodine-sulfur cycle |
| CN101830443B (en) * | 2010-04-14 | 2011-06-15 | 清华大学 | Process for purifying sulfuric acid phase and hydriodic acid phase in iodine-sulfur cycle |
| CN103429313A (en) * | 2011-02-01 | 2013-12-04 | 琳德股份公司 | Process for removing contaminants from gas streams |
| CN103429313B (en) * | 2011-02-01 | 2015-03-11 | 琳德股份公司 | Process for removing contaminants from gas streams |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1085187C (en) | 2002-05-22 |
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