CN101792130B - Hot-air blowing method for supporting insulator of electrostatic precipitator in pyrite-based sulfuric acid production - Google Patents
Hot-air blowing method for supporting insulator of electrostatic precipitator in pyrite-based sulfuric acid production Download PDFInfo
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- CN101792130B CN101792130B CN2009101029966A CN200910102996A CN101792130B CN 101792130 B CN101792130 B CN 101792130B CN 2009101029966 A CN2009101029966 A CN 2009101029966A CN 200910102996 A CN200910102996 A CN 200910102996A CN 101792130 B CN101792130 B CN 101792130B
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Abstract
The invention discloses a hot-air blowing method for a supporting insulator of an electrostatic precipitator in pyrite-based sulfuric acid production. The process equipment in the method consists of a demisting chamber 3, a draught fan 4, an insulator chamber 5, the electrostatic precipitator 6 and connected process pipelines. In the method, a pipeline is introduced into the demisting chamber 3 from a channel for tail gas 1 absorbed by an absorbing system to discharge into atmosphere 2; the tail gas is delivered to the insulator chamber 5 for blowing through the draught fan 4 which is connected with the demisting chamber 3; then, the tail gas enters the electrostatic precipitator 6 and is discharged, wherein the introduced tail gas is at about 75 DEG C, and the gas is dried hot gas; the hot gas can be used for hot air blowing for the insulator of the electrostatic precipitator by pumping of the draught fan 4; temperatures of the inner wall and the outer wall of the insulator can be the same by heating so as to avoid dewing phenomenon; and an electric heater is closed when a device works, the power consumption of the device can be effectively reduced by utilizing heat energy of the tail gas in the pyrite-based sulfuric acid production, and part of sulphur dioxide in the tail gas can be reclaimed by a demister 3 and the electrostatic precipitator 6. Therefore, the method is advantageous to environmental protection.
Description
Technical field
The invention belongs to production field in the pyrite-based sulfuric acid production, relate in particular to hot-air blowing method for supporting insulator of electrostatic precipitator in the pyrite-based sulfuric acid production.
Background technology
In the pyrite-based sulfuric acid production, electrostatic precipitator is one of device key equipment, its work ultimate principle is to utilize high-voltage dc, remove the sulfuric acid mist that produces in the pyrite burning process, in order to ensure the stability of high-voltage dc, its supporting insulator all adopts external type of heating to carry out hot-air blowing, has caused the plant energy consumption increase.
For cutting down the consumption of energy, researcher is constantly attempted various effective ways both at home and abroad, and to so far, comparatively sophisticated is the cold wind purging system of Qingdao these research and development of Harrar, and this system can satisfy the production demand substantially when the device ordinary production; But this system has following shortcoming:
1) electrostatic precipitator electric current and voltage under original driving situation is lower, the demist decrease in efficiency.
2) after stopping in emergency appearred in device, baking flue gas was scurried into insulator chamber, caused supporting insulator creepage, after need cleaning supporting insulator, and can works better.
3) at the electrostatic precipitator that old device is transformed in normal productive process, demist efficient descends to some extent.If will reach original demist efficient, need the energy that expands to electrostatic precipitator, investment increases.
In addition, in Chinese patent literature, aspect electrostatic precipitator, many patent application documents are arranged also, as application number is 200510041490.0, and name is called " assembled smoke gas denitration, dedusting, desulfurizer ", is the smoke eliminator that pollutes control or association area about power-plant flue gas.Relatively to have technology more reasonable with the smoke eliminator of routine, system layout compactness, investment and the low characteristics of working cost.Electric precipitator (and electrostatic precipitator is arranged; Application number 200620137691.0, name are called " a kind of electrostatic precipitator " and just relate to a kind of the be used for dedusting of gas cleaning, the electrostatic precipitator improvement of demist process.Convert anode tube the leaking outside of causing of breaking to interior leakage, increase the characteristics in its work-ing life.In addition; at application number is 200820031741.6; name is called " electric mist insulator gas shield device " and discloses the interior electric mist insulator gas shield device of static demist technical field; can replenish a spot of exsiccant air by inlet pipe; insulator inside and outside wall temperature is equated; no dewfall phenomenon can keep the state of insulation of insulator.The utility model is applied on the high pressure static electricity mist eliminator, can save a large amount of electric energy.
Do not find the relevant patent documentation of electrostatic precipitator in the pyrite-based sulfuric acid production by retrieval.
Summary of the invention
Purpose of the present invention is energy-saving and cost-reducing, be to come from the casing of electric mist insulated case to be provided with the piped insulator, some electric heating tubes are installed on the cabinet wall of insulator periphery, by heating insulator inside and outside wall temperature is equated, no dewfall phenomenon produces, guaranteeing that demist is working properly carries out, and this need consume a large amount of electric energy; The contriver is for saves energy, under the dedusting working order, can close electric heating tube, can allow insulator inside and outside wall temperature can not differ greatly again and produce the dewfall phenomenon, destroy the state of insulation of insulator, adopt the method that feeds the exsiccant tail gas of preparing discharging, insulator inside and outside wall temperature is equated, no dewfall phenomenon, can keep the state of insulation of insulator can utilize the pyrite-based sulfuric acid production exhaust heat-energy again, effectively reduce the consumption of plant energy consumption, reclaimed the part sulfurous gas in the tail gas simultaneously, reached energy saving purposes, invention has the benefit of tangible environmental protection.
The present invention adopts following method and apparatus to finish above purpose:
Hot-air blowing method for supporting insulator of electrostatic precipitator in the pyrite-based sulfuric acid production of the present invention, its processing unit is by removing fog chamber 3, induced draft fan 4, insulator chamber 5, electrostatic precipitator 6 and the process pipe composition that connects; Introduce a pipeline from the tail gas 1 after the absorption system absorption to the pipeline that enters atmosphere 2 to removing fog chamber 3, by connecting the induced draft fan 4 that removes fog chamber 3, the insulator chamber 5 of delivering to pipe connection purges, and then, enters electrostatic precipitator 6 discharges; Enter about 75 ℃ of atmospheric exhaust temperature after the absorption tower absorbs, moiety is that content of sulfur dioxide is 960mg/m
3, acid mist is 30mg/m
3, all the other are nitrogen, because this part gas is the exsiccant hot gas, through induced draft fan 4 suctions,, insulator inside and outside wall temperature is equated by heating as electrostatic precipitator insulator hot-air blowing, not having the dewfall phenomenon produces, just can close electric heater during work,, effectively reduce the consumption of device electric energy by utilizing the pyrite-based sulfuric acid production exhaust heat-energy, simultaneously, mist eliminator 3, electrostatic precipitator 6 have reclaimed the part sulfurous gas in the tail gas.
Effect of the present invention or advantage, 1) effectively utilized the heat energy of tail gas in the pyrite-based sulfuric acid production process, saving supporting insulator simultaneously need adopt external heating or carry out the energy consumption of hot-air blowing, reclaimed the sulfurous gas of part in the tail gas, both reached energy saving purposes, tangible environmental benefit had been arranged again.2) easy with the reducing energy consumption of original pyrite-based sulfuric acid production device, former main device is not changed, only increase equipment component, do not influence the main operation control of original device.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
In Fig. 1, the tail gas after 1. absorption system absorbs 2. enters atmosphere, 3. removes fog chamber, 4. induced draft fan, 5. insulator chamber, 6. electrostatic precipitator.
Embodiment
Claims (1)
1. hot-air blowing method for supporting insulator of electrostatic precipitator in the pyrite-based sulfuric acid production of the present invention is characterized in that processing unit is by removing fog chamber (3), induced draft fan (4), insulator chamber (5), electrostatic precipitator (6) and the process pipe composition that connects; Introduce a pipeline from the tail gas (1) after the absorption system absorption to the pipeline that enters atmosphere (2) to removing fog chamber (3),, deliver to insulator chamber (5) purging, then, enter electrostatic precipitator (6) and discharge by connecting the induced draft fan (4) that removes fog chamber (3); Enter 75 ℃ of atmospheric exhaust temperatures after the absorption tower absorbs, content of sulfur dioxide is 960mg/m in the composition of composition
3, acid mist is 30mg/m
3, all the other are nitrogen, this part gas is the exsiccant hot gas, aspirate through induced draft fan (4), behind electrostatic precipitator insulator hot-air blowing, just close electric heater during work, by utilizing the pyrite-based sulfuric acid production exhaust heat-energy, effectively reduce the device power consumption, mist eliminator (3), electrostatic precipitator (6) have reclaimed the part sulfurous gas in the tail gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101029966A CN101792130B (en) | 2009-12-30 | 2009-12-30 | Hot-air blowing method for supporting insulator of electrostatic precipitator in pyrite-based sulfuric acid production |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101029966A CN101792130B (en) | 2009-12-30 | 2009-12-30 | Hot-air blowing method for supporting insulator of electrostatic precipitator in pyrite-based sulfuric acid production |
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| CN101792130A CN101792130A (en) | 2010-08-04 |
| CN101792130B true CN101792130B (en) | 2011-10-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014001638A1 (en) * | 2012-06-28 | 2014-01-03 | Metso Power Oy | Arrangement and method in electric filter |
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2009
- 2009-12-30 CN CN2009101029966A patent/CN101792130B/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014001638A1 (en) * | 2012-06-28 | 2014-01-03 | Metso Power Oy | Arrangement and method in electric filter |
| EP2866940A4 (en) * | 2012-06-28 | 2016-02-24 | Valmet Technologies Oy | Arrangement and method in electric filter |
| US9845952B2 (en) | 2012-06-28 | 2017-12-19 | Valmet Technologies Oy | Arrangement and method in electric filter |
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| CN101792130A (en) | 2010-08-04 |
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Address after: 550500 Guizhou Province, Qiannan Buyei and Miao Autonomous Prefecture Fuquan Racecourse town Yingbin Road No. 1 Wengfu group Patentee after: WENGFU GROUP Co.,Ltd. Address before: 550002, International Building, No. 57, South City Road, Nanming District, Guizhou, Guiyang Patentee before: WENGFU GROUP Co.,Ltd. |
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