CN1035441A - The dry purification process of flux galvanizing smog - Google Patents
The dry purification process of flux galvanizing smog Download PDFInfo
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- CN1035441A CN1035441A CN 88105485 CN88105485A CN1035441A CN 1035441 A CN1035441 A CN 1035441A CN 88105485 CN88105485 CN 88105485 CN 88105485 A CN88105485 A CN 88105485A CN 1035441 A CN1035441 A CN 1035441A
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- flue
- zinc
- galvanizing
- sack cleaner
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Abstract
The present invention is a kind of process for purifying of flux galvanizing smog, and the galvanizing of particularly suitable sheet metal flux produces the purification of smog.
This technology is at the property one-tenth of the ultrafine of zinc mist, high moisture absorption, high viscosity.According to zinc mist deliquescence curve, adopt technological process as shown in the figure, reach the purpose of improving working conditions, ensure workman's health key health, particularly avoided zinc mist pollution on the environment.
Description
The present invention is a kind of dry purification process of flux galvanizing smog, is specially adapted to the purification that the galvanizing of sheet metal flux produces smog.
During the galvanizing of steel flux, the flux of being made up of ammonium chloride and zinc chloride is quickish in the reaction speed of zinc pot, and in reaction and vaporization, the molten bath can give off strong white smoke, i.e. the zinc mist.The galvanizing of sheet metal flux is because the plating piece surface area is big, the plate face requires quality height, zinc pot temperature height, and it is heavy to produce load, so the discharging of zinc mist is stronger.This zinc mist is mainly become to be grouped into by ammonium chloride, zinc chloride, aluminium chloride and zinc chloride etc.Its composition is complicated, and has the character of ultrafine, high moisture absorption, high viscosity.
The zinc mist purification method that day disclosure 51-14138 has discharged when having introduced the continuous zinc coating of band steel.Because it adopts strong reducing property gas hydrogen and nitrogen to clean plating material surface and shields, the main component of zinc mist is zinc oxide and protection gas, and it and the galvanizing of sheet metal flux produce the composition and the different in kind of smog, so the improvement method is also different.
The improvement of zinc mist divides two kinds of wet method and dry method.Germany patent 3403737-A has introduced the method for employing wet scrubbing galvanizing coating bath combustion gas and the processing of washings, and the means of dry treatment flue dust mainly contain: sedimentation, cyclonic separation method, cloth bag filtration method, electric precipitation, particle dedusting and the filtration method that dusts.Though sedimentation and cyclonic separation method are simple, expense is low, because the particle diameter of zinc mist is too little, in light weight, can't reach the purification purpose.Particle dedusting biggest advantage is can be high temperature resistant, and dust high viscosity also is unfavorable for purifying ultra-fine.Powder injection process is the means of taking at the purification of sticky dust, and technology is newer, but this aspect can make the flue dust material increase, complicated componentization, and the comprehensive utilization difficulty, operating cost is higher.The purification efficiency of electric precipitation than higher, running cost is lower, but the zinc spray dust of viscosity sticks on the pole plate easily, can't flow automatically, and influences dust removing effects.Simultaneously, the volume of electric cleaner is bigger, and once investment is high, and need understand fully the ratio resistance value of flue dust, adopts this method, and the place is bigger, invests higher.
The objective of the invention is to overcome the deficiency of said method, utilize that investment is less, floor space is less and cloth bag dust collection method that efficiency of dust collection is higher, the zinc mist that produces when administering the flux galvanizing, improve working conditions, ensure that the workman is healthy, especially avoided zinc mist pollution on the environment.
The present invention proposes a kind of dry purification process according to the character of flux galvanizing generation zinc mist, and its technological process as shown in Figure 1.The greatest difficulty of cloth bag purification smog is the deliquescence that will prevent flue dust, overcomes the trouble that viscosity is brought, and prevents " sticking with paste bag ".The present invention utilizes high-temperature and relative humidity relative theory, find out the temperature range that the zinc mist is not subjected to the moisture absorption deliquescence, its numerical value is determined by zinc mist deliquescence curve (Fig. 2), the flue-gas temperature of sack cleaner is advanced in control then, and the control flue-gas temperature will be noted the anticorrosion of the insulation of flue gas, the seal of controlling tolerance, system and equipment.When if flue gas does not reach desired temperature or equipment fault occurs,, deduster safety closed cycle heat-insulation system is set for guaranteeing the safe work state of deduster.In addition, for the deashing of favourable deduster unloads dirt, reverse gas cleaning wind be should give heating, its numerical value should be greater than the flue-gas temperature of advancing sack cleaner (can＞10 ℃), for guaranteeing this technology, should select strong sack cleaner of deashing force (should use S VI type revolution sack cleaner) and filtrate (should use " 729 " filtrate) for use.Deduster should be provided with the safety by-pass road, and notes the anti-clogging measure of equipment.Total system will be set up necessary security warning, automatic control and manual supplementary measures.
The present invention has the following advantages:
1, bag-type dust efficient height, and be applicable to the flue dust that captures this special small particle diameter;
2, bag-type dust non-secondary pollution;
3, special corollary apparatus is easy to suit;
4, device is stable continuously, and floor space is less;
5, cloth bag filtration air speed wider range, operating flexibility is big;
6, gather dust and to fully utilize.
Fig. 1 is a zinc mist dry purification process flow chart.
Fig. 2 is a zinc fog dust dirt deliquescence curve map.
Embodiment: the zinc mist controlling device on the galvanized sheet metal production line of 1.8 ten thousand tons of annual productions, adopt this technology, dust concentration can be by 414.2 milligrams/mark rice
3Drop to 17.6 milligrams/mark rice
3Main technologic parameters is: the smoke treatment amount: 30000 meters
3/ time, blowback air quantity: 1610-3650 rice
3/ time, counter-blowing wind-pressure: the 592-533 millimeter of water, temperature range: 30-80 ℃ of flue gas control, deduster filter area: 690 meters
2, the rate of filtration: 0.7 meter/minute.
Claims (8)
1, a kind of flux galvanizing produces the process for purifying of zinc mist.It is characterized in that at character such as zinc mist ultrafine, high moisture absorption, high viscosities, propose the technology of following dry cleaning: the smog that galvanizing produces is through inhaling cover, heating apparatus control valve, enter sack cleaner with certain temperature, continue and extract out, purify fume emission by blower fan.
2, technology according to claim 1 is characterized in that the principle of utilizing temperature relevant with relative humidity, finds out the temperature range that the zinc mist is not subjected to the moisture absorption deliquescence, and its numerical value is determined that by zinc mist deliquescence curve the flue-gas temperature of sack cleaner is advanced in control then.
3, technology according to claim 2 is characterized in that controlling flue-gas temperature and will note the anticorrosion of the insulation of flue gas, the seal of controlling tolerance, system and equipment.
4, technology according to claim 2 is characterized in that when flue gas does not reach desired temperature or equipment fault occurs, for guaranteeing the safe work state of deduster, deduster safety closed cycle heat-insulation system is set.
5, technology according to claim 1 is characterized in that unloading dirt for the deashing of favourable deduster, and reverse gas cleaning wind be should give heating, and its numerical value should be greater than the flue-gas temperature of advancing sack cleaner (can＞10 ℃).
6, technology according to claim 1 is characterized in that sack cleaner (should use S IV type revolution sack cleaner) and the filtrate (should use " 729 " filtrate) of selecting for use deashing force strong.
7, technology according to claim 6 is characterized in that deduster should be provided with the safety by-pass road, and notes the anti-clogging measure of equipment.
8, technology according to claim 1 is characterized in that total system will set up necessary security warning, automatic control and manual supplementary measures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88105485 CN1020549C (en) | 1988-03-03 | 1988-03-03 | Dry clarificating technology for smoke of flux hot-dipping zn |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88105485 CN1020549C (en) | 1988-03-03 | 1988-03-03 | Dry clarificating technology for smoke of flux hot-dipping zn |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1035441A true CN1035441A (en) | 1989-09-13 |
| CN1020549C CN1020549C (en) | 1993-05-12 |
Family
ID=4833671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88105485 Expired - Fee Related CN1020549C (en) | 1988-03-03 | 1988-03-03 | Dry clarificating technology for smoke of flux hot-dipping zn |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1020549C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580416A (en) * | 2012-03-20 | 2012-07-18 | 南京大吉铁塔制造有限公司 | Method for preventing filter bag of bag type collector from blockage |
| CN104645741A (en) * | 2013-11-22 | 2015-05-27 | 河北建支铸造集团有限公司 | Quicklime-adding apparatus of bag-type dust remover |
| CN108452605A (en) * | 2018-03-14 | 2018-08-28 | 宇星科技发展(深圳)有限公司 | A kind of flue gas dust collecting system technique and its flue device of application |
-
1988
- 1988-03-03 CN CN 88105485 patent/CN1020549C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580416A (en) * | 2012-03-20 | 2012-07-18 | 南京大吉铁塔制造有限公司 | Method for preventing filter bag of bag type collector from blockage |
| CN104645741A (en) * | 2013-11-22 | 2015-05-27 | 河北建支铸造集团有限公司 | Quicklime-adding apparatus of bag-type dust remover |
| CN108452605A (en) * | 2018-03-14 | 2018-08-28 | 宇星科技发展(深圳)有限公司 | A kind of flue gas dust collecting system technique and its flue device of application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1020549C (en) | 1993-05-12 |
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