CN1853758A - Method for treating waste gas containing lead - Google Patents
Method for treating waste gas containing lead Download PDFInfo
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- CN1853758A CN1853758A CN 200510049687 CN200510049687A CN1853758A CN 1853758 A CN1853758 A CN 1853758A CN 200510049687 CN200510049687 CN 200510049687 CN 200510049687 A CN200510049687 A CN 200510049687A CN 1853758 A CN1853758 A CN 1853758A
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Abstract
A method for treating the Pb-contaied waste gas features that said waste gas is filled into a cyclone plate tower and the aqueous solution of acetic acid or sodium hydroxide is used as absorbent to absorb Pb from said waste gas. Its advantages are high effect (96% or more) and low cost.
Description
(I) technical field
The invention relates to a method for treating waste gas, in particular to a method for treating lead-containing waste gas.
(II) background of the invention
Lead is a light green,grey and soft heavy metal with a high specific gravity (11.34), a low melting point (327 ℃) and a high boiling point (1740 ℃). Lead is a very harmful heavy metal element. Lead generally enters human body through respiratory tract, digestive tract and skin, and almost all organs can be damaged due to wide affinity to human body tissues, wherein brain and kidney are the most seriously damaged, and blood is firstly damaged. In severe cases, senile dementia, congenital dementia of infants, mental retardation, and other diseases can be caused.
According to the characteristics of production of storage battery enterprises, in the storage battery industry, lead pollutants mainly come from lead-containing waste gas generated in sections such as grid manufacturing, lead grain manufacturing, paste mixing, partition plate wrapping, slicing, welding and assembling and lead-containing waste water generated in each section. With the development of the storage battery industry, the pollution of lead has attracted more and more attention.
At present, the domestic and foreign purification methods for lead-containing waste gas (smoke dust) mainly comprise an electrostatic method, a filtration method and an absorption method. Under proper operating conditions, the 3 types of methods can achieve higher purification efficiency, but have the problems of large energy consumption loss and high operating cost of a purification system. And from the collection system that current battery manufacturing enterprise configured, collection efficiency is poor, and workshop lead pollution is still very serious. Therefore, how to design a scientific collecting and purifying system is a key for researching and solving the pollution treatment problem of lead-containing waste gas.
The cyclone plate tower is a novel efficient absorption device, liquid on a tower plate is highly dispersed in gas and liquid under the action of high-speed rotating airflow to form two-phase contact states of foam, mist, film and the like, and the treatment efficiency is high. At present, no relevant report that the cyclone plate tower is used for treating the lead-containing waste gas exists.
Disclosure of the invention
The invention aims to provide a method for treating lead-containing waste gas with high purification efficiency, low energy consumption loss and low running cost.
The technical scheme adopted by the invention for achieving the aim of the invention is as follows:
the method comprises the steps of introducing the waste gas into a cyclone plate tower, and carrying out absorption and purification by using an acetic acid aqueous solution with the concentration of 0.5-3% or a sodium hydroxide aqueous solution with the concentration of 0.4-5% as an absorption liquid to obtain the treated gas.
When the absorption liquid adopts a sodium hydroxide aqueous solution, the pH value is controlled to be 9-10 in the purification process, lead is precipitated, and the supernatant of the absorption liquid can be returned to the circulating tank for continuous use.
See in particular fig. 1.
The reaction using acetic acid solution absorption was:
the reaction absorbed by the alkali liquor is as follows:
when the lead-containing waste gas is lead fume, the method comprises the following steps: after the lead fume is collected by upward air suction or side air suction, the lead fume enters the cyclone plate tower through the induced draft fan, the lead fume is absorbed and purified through absorption liquid in the cyclone plate tower, the absorption liquid is an acetic acid aqueous solution with the concentration of 0.5-3% or a sodium hydroxide aqueous solution with the concentration of 0.4-5%, and the treated gas is discharged after demisting through the demisting plate.
When the lead-containing waste gas is lead dust, the method comprises the following steps: after the lead dust is collected by lower air suction, the lead dust enters the cyclone plate tower through the induced draft fan, the lead dust is absorbed and purified through absorption liquid in the cyclone plate tower, the absorption liquid is an acetic acid aqueous solution with the concentration of 0.5-3% or a sodium hydroxide aqueous solution with the concentration of 0.4-5%, and the treated gas is discharged after demisting through the demisting plate.
The method for treating the lead-containing waste gas has the beneficial effects that: (1) the treatment method adopts a cyclone column plate as main purification equipment, and the purification efficiency of lead fume and lead dust in the waste gas is more than 96 percent; (2) low energy consumption and low cost.
(IV) description of the drawings:
FIG. 1 is a flow chart of the processing method of the present invention.
(V) detailed description of the preferred embodiments
The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto:
example 1:
the RST type cyclone plate tower is adopted, a waste gas inlet is connected with a waste gas collecting device through an induced draft fan, lead-containing waste gas enters the cyclone plate tower through the induced draft fan when equipment runs, the lead-containing waste gas passes through a purification tower plate in the cyclone plate tower from bottom to top to remove lead contained in the waste gas, and finally demisting is carried out on a demisting plate and then enters the atmosphere through an exhaust pipe. The absorption liquid is acetic acid water solution with mass concentration of 2.5%.
On induced draft collect lead smoke, lead smoke gets into the whirl plate bottom through the draught fan, when lead smoke gets into the whirl plate bottom, the absorption liquid is inhaled from circulating water tank through the water pump, send to on the blind plate of highest one deck tower, the downward successive layer of absorption liquid passes through the column plate, with being spouted into tiny liquid drop by the air current that passes the blade passageway, lead smoke piles the department at column plate and overflow and carries out the mass transfer heat transfer, harmful substance is detached, the atmosphere is discharged into to the gas after the defogging of defogging board after the purification, the absorption liquid returns the circulating tank through the outlet pipe, for guaranteeing treatment effect, need often change the absorption liquid. Lead waste gas at each working point is purified and is lower than the highest allowable sanitary mass concentration of 0.03mg/m designed by national industrial enterprises3The standard of (2).
Example 2:
the RST type cyclone plate tower is adopted, a waste gas inlet is connected with a waste gas collecting device through an induced draft fan, lead-containing waste gas enters the cyclone plate tower through the induced draft fan when equipment runs, the lead-containing waste gas passes through a purification tower plate in the cyclone plate tower from bottom to top to remove lead contained in the waste gas, and finally demisting is carried out on a demisting plate and then enters the atmosphere through an exhaust pipe. The absorption liquid is sodium hydroxide aqueous solution with the mass concentration of 3.0%, the pH value of the absorption liquid is controlled to be 9-10, lead precipitation is generated, and supernatant liquid of the lead precipitation can be returned to the circulating pool for continuous use.
The lead dust is collected in the downdraft, and the lead dust gets into the whirl plate tower bottom through the draught fan, and when the lead dust got into whirl plate tower bottom, absorption liquid was followed circulation tank through the water pump and is sucked up, sent to the blind plate of the highest layer of tower on, absorption liquidThe lead dust is subjected to mass transfer and heat transfer at the tower plate and the overflow pile, harmful substances are removed, the purified gas is demisted by a demisting plate and then discharged into the atmosphere, and the absorption liquid flows into a circulating pool through a drain pipe for continuous use. Lead dust at each working point is purified and is lower than the highest allowable sanitary mass concentration of 0.03mg/m designed by national industrial enterprises3The standard of (2).
Claims (4)
1. The method is characterized in that the lead-containing waste gas isintroduced into a cyclone plate tower and is absorbed and purified by absorption liquid arranged in the cyclone plate tower, wherein the absorption liquid is 0.5-3% acetic acid aqueous solution or 0.4-5% sodium hydroxide aqueous solution.
2. The method for treating lead-containing waste gas according to claim 1, wherein the absorption solution is an aqueous solution of sodium hydroxide, and the pH value is controlled to 9 to 10 during the purification process.
3. The method according to claim 1, wherein the lead-containing exhaust gas is lead fume, and the method comprises: after the lead fume is collected by upward air suction or side air suction, the lead fume enters the cyclone plate tower through the induced draft fan, the lead fume is absorbed and purified through absorption liquid in the cyclone plate tower, the absorption liquid is an acetic acid aqueous solution with the concentration of 0.5-3% or a sodium hydroxide aqueous solution with the concentration of 0.4-5%, and the treated gas is discharged after demisting through the demisting plate.
4. The method according to claim 1, wherein the lead-containing waste gas is lead dust, and the method comprises: after the lead dust is collected by lower air suction, the lead dust enters the cyclone plate tower through the induced draft fan, the lead dust is absorbed and purified through absorption liquid in the cyclone plate tower, the absorption liquid is an acetic acid aqueous solution with the concentration of 0.5-3% or a sodium hydroxide aqueous solution with the concentration of 0.4-5%, and the treated gas is discharged after demisting through the demisting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510049687 CN1853758A (en) | 2005-04-28 | 2005-04-28 | Method for treating waste gas containing lead |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510049687 CN1853758A (en) | 2005-04-28 | 2005-04-28 | Method for treating waste gas containing lead |
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| CN1853758A true CN1853758A (en) | 2006-11-01 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102000475A (en) * | 2010-10-28 | 2011-04-06 | 江门三同新能源科技有限公司 | Environmental-protection treatment system for production process of lead-acid battery polar plate |
| CN101725988B (en) * | 2009-11-03 | 2011-08-10 | 洪一兵 | Integrated method for treating and utilizing refuse |
| CN102389698A (en) * | 2011-09-16 | 2012-03-28 | 百力达太阳能股份有限公司 | Effective method for industrial fluorinion-containing waste gas treatment |
| CN103446827A (en) * | 2013-09-30 | 2013-12-18 | 佛山市海天(高明)调味食品有限公司 | Chicken essence waste gas treatment process, waste gas purifying device and chicken essence waste gas treatment system |
| CN103551023A (en) * | 2013-10-30 | 2014-02-05 | 常州大学 | Lead smoke purifying treatment method |
| CN104474868A (en) * | 2014-12-05 | 2015-04-01 | 黄敏方 | Smoke dust removal system |
| CN106731608A (en) * | 2017-01-04 | 2017-05-31 | 长沙汇聚环境技术有限公司 | A kind of administering method of waste gas containing lead |
| CN107051152A (en) * | 2017-01-04 | 2017-08-18 | 长沙汇聚环境技术有限公司 | A kind of method of the leaded treating flour dust of sintering machine wet desulfurization flue gas |
| CN110218858A (en) * | 2019-07-04 | 2019-09-10 | 武汉淡蓝环保科技开发有限公司 | The waste gas containing lead processing unit that patenting generates in a kind of Production for Steel Wire |
-
2005
- 2005-04-28 CN CN 200510049687 patent/CN1853758A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725988B (en) * | 2009-11-03 | 2011-08-10 | 洪一兵 | Integrated method for treating and utilizing refuse |
| CN102000475A (en) * | 2010-10-28 | 2011-04-06 | 江门三同新能源科技有限公司 | Environmental-protection treatment system for production process of lead-acid battery polar plate |
| CN102389698A (en) * | 2011-09-16 | 2012-03-28 | 百力达太阳能股份有限公司 | Effective method for industrial fluorinion-containing waste gas treatment |
| CN103446827B (en) * | 2013-09-30 | 2015-10-07 | 佛山市海天(高明)调味食品有限公司 | A kind of chickens' extract waste gas treatment process, waste gas purification apparatus and chickens' extract exhaust treatment system |
| CN103446827A (en) * | 2013-09-30 | 2013-12-18 | 佛山市海天(高明)调味食品有限公司 | Chicken essence waste gas treatment process, waste gas purifying device and chicken essence waste gas treatment system |
| CN103551023A (en) * | 2013-10-30 | 2014-02-05 | 常州大学 | Lead smoke purifying treatment method |
| CN103551023B (en) * | 2013-10-30 | 2015-10-28 | 常州大学 | A kind of lead fume purifying treatment method |
| CN104474868A (en) * | 2014-12-05 | 2015-04-01 | 黄敏方 | Smoke dust removal system |
| CN104474868B (en) * | 2014-12-05 | 2016-03-30 | 黄敏方 | A kind of smoke abatement system |
| CN106731608A (en) * | 2017-01-04 | 2017-05-31 | 长沙汇聚环境技术有限公司 | A kind of administering method of waste gas containing lead |
| CN107051152A (en) * | 2017-01-04 | 2017-08-18 | 长沙汇聚环境技术有限公司 | A kind of method of the leaded treating flour dust of sintering machine wet desulfurization flue gas |
| CN110218858A (en) * | 2019-07-04 | 2019-09-10 | 武汉淡蓝环保科技开发有限公司 | The waste gas containing lead processing unit that patenting generates in a kind of Production for Steel Wire |
| CN110218858B (en) * | 2019-07-04 | 2020-12-08 | 安徽风雷机械设备制造有限公司 | Lead-containing waste gas treatment device for lead quenching in steel wire production |
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