CN111589584A - Electric dust collection system based on flue gas purging - Google Patents
Electric dust collection system based on flue gas purging Download PDFInfo
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- CN111589584A CN111589584A CN202010475702.0A CN202010475702A CN111589584A CN 111589584 A CN111589584 A CN 111589584A CN 202010475702 A CN202010475702 A CN 202010475702A CN 111589584 A CN111589584 A CN 111589584A
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- flue gas
- blowing
- electric dust
- blowing pipe
- rotating shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
- B03C3/70—Applications of electricity supply techniques insulating in electric separators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrostatic Separation (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides an electric dust collection system based on flue gas purging, which comprises a fan and an electric dust collector device, wherein the electric dust collector device comprises: the ceramic rotary shaft blowing device comprises a heat insulation box body for heat insulation, a ceramic rotary shaft arranged in the middle of the heat insulation box body and a blowing pipe for blowing the ceramic rotary shaft; the blowing pipe is connected with the fan through a pipeline, the blowing pipe is arranged above the ceramic rotating shaft and is parallel to the ceramic rotating shaft, a blowing groove for spraying gas is arranged in the length direction of the blowing pipe, and the gas is purified flue gas of the electric dilution furnace. Through jetting pipe and jetting groove, reach certain pressure with high temperature, dry flue gas and sweep the porcelain pivot, make the epaxial dust of porcelain pivot and moisture content take away, ensure the insulating properties of porcelain pivot insulator. Meanwhile, the high dew point flue gas is expelled out of the heat preservation box body, so that the dew point temperature and influence of an insulating part in the heat preservation box body are reduced, and energy consumption is saved.
Description
Technical Field
The invention relates to the technical field of purification and dust removal of nonferrous smelting electric dust collectors, in particular to an electric dust collection system based on flue gas purging.
Background
The electric dust collector is used for purifying and treating non-ferrous metal smelting fume, is one of the most widely used devices in fume treatment in pyrometallurgical and high-temperature smelting processes, and has operation stability directly related to the operation of the whole fume system, so that the whole smelting process is affected.
However, the existing nonferrous smelting flue gas has high water content and SO in the flue gas3The high content, the dew point of 250 ℃, causes the temperature of the incubator to be difficult to maintain. The result is frequent damage to the insulation, poor power supply to the electric precipitator and low dust removal efficiency. The main source is that the insulating part of the electric dust collector fails, the condensation occurs to cause the reduction of the insulating property, and the electric dust collector is in an electric stateIn the long-term operation in-process of dust collector, the heat that electric dust collector insulating part provided through electric heating pipe in the insulation can maintains the temperature and ensures that the insulating part surface does not condense, but the insulating part contacts with the flue gas again simultaneously, it is bigger to receive the influence of flue gas temperature simultaneously, when the condition that the temperature reduces appears, cause the insulating part to condense, insulating properties descends, the creepage phenomenon damages, lead to the electric dust collector electric field voltage to descend, influence the dust collection efficiency of electric dust collector, can also cause the electric field short circuit to lead to equipment shutdown when serious.
Therefore, in order to keep the insulation porcelain insulator with high insulation performance all the time, the temperature of the insulation box is generally raised by increasing the power of the electric heating pipe, and the temperature is controlled by the upper and lower temperature limits. However, for flue gas with a high dew point, the heating and temperature control difficulties are high, and particularly, the heating time is long during the start-stop period. The common hot air blowing device generally heats air by using an independent electric heating furnace, not only is the energy consumption high, but also the insulation performance of high dew point flue gas is ensured to be continuously blown when the dew point reaches above 250 ℃, the difficulty of increasing the air quantity is increased, and the difficulty of maintaining higher temperature is also higher.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide an electric dust collecting system based on flue gas purging, and aims to solve the problem that the temperature rise time of an electric dust collector in the existing electric dust collecting system based on flue gas purging is long.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides an electric dust collector system based on flue gas sweeps, includes fan, electric dust collector device includes: the ceramic blowing device comprises a heat insulation box body for heat insulation, a ceramic rotating shaft arranged in the middle of the heat insulation box body, and a blowing pipe for blowing the ceramic rotating shaft, wherein the blowing pipe is arranged above the ceramic rotating shaft and is parallel to the ceramic rotating shaft, and a blowing groove for blowing gas is arranged in the length direction of the blowing pipe; the gas is purified flue gas of a cleaning electric furnace; the blowing pipe is connected with the fan through a pipeline.
The electric dust collecting system based on flue gas purging, wherein the blowing pipes comprise a first blowing pipe and a second blowing pipe, the first blowing pipe and the second blowing pipe are respectively arranged on two sides of the porcelain rotating shaft, and the setting height of the first blowing pipe is higher than that of the second blowing pipe.
The electric dust collecting system based on flue gas purging, wherein the opening of the blowing groove faces the ceramic rotating shaft.
The electric dust collecting system based on flue gas purging, wherein an included angle between a plane where the first blowing pipe and the ceramic rotating shaft are located and a horizontal plane is a, 45 degrees < a <90 degrees, an included angle between a plane where the second blowing pipe and the ceramic rotating shaft are located and the horizontal plane is b, and b is smaller than 45 degrees.
The electric dust collecting system based on flue gas purging is characterized in that the distance between the blowing pipe and the ceramic rotating shaft is 0.2-0.5 m.
The electric dust collecting system based on flue gas purging, wherein a sealing plate is arranged inside the heat insulation box, and a heat insulation layer is arranged outside the heat insulation box.
The electric dust collecting system based on flue gas purging is characterized in that a heat insulation coating is coated on the sealing plate.
The electric dust collecting system based on flue gas purging, wherein the temperature of the flue gas of the electric dilution furnace is 140-300 ℃.
The electric dust collecting system based on flue gas purging, wherein the pressure of the flue gas of the electric cleaning furnace is 2000Pa-3200 Pa.
The electric dust collecting system based on flue gas purging, wherein the opening width of the blowing groove is 5-10 mm.
Has the advantages that: according to the electric dust collection system based on flue gas blowing, the air outlet of the blowing pipe in the heat-insulating box body is in a slot shape instead of a hollow shape, the blowing efficiency is improved, meanwhile, the gas used in the blowing pipe is the flue gas of the dilution electric furnace, the flue gas belongs to the gas with high temperature and low dew point, the dust and moisture on the ceramic rotating shaft can be taken away, the heating energy consumption is reduced, and the insulating property of the ceramic rotating shaft insulating part is ensured.
Drawings
FIG. 1 is a process flow diagram of an electric dust collecting system based on flue gas purging according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of an electric dust collector apparatus according to an embodiment of the present invention.
FIG. 3 is a schematic structural diagram of a blowing pipe in an electric dust collecting system based on flue gas purging provided by an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, a process flow diagram of an electric dust collecting system based on flue gas purging according to an embodiment of the present invention is shown. As shown in fig. 1, the electric dust collecting system based on flue gas purging provided by the present invention includes a fan 10 and an electric dust collector device, where the electric dust collector device includes: the device comprises a heat insulation box body 20 for heat insulation, a porcelain rotating shaft 30 arranged in the middle of the heat insulation box body, and an injection tube 40 for purging the porcelain rotating shaft, wherein the injection tube 40 is arranged above the porcelain rotating shaft 30 and is parallel to the porcelain rotating shaft, and a blowing groove for gas ejection is arranged in the length direction of the injection tube 40; the gas is purified flue gas of a cleaning electric furnace; the blowing pipe 40 is connected to the blower 10 through a pipe. Wherein, each pipeline for connecting the blowing pipe and the air pipe of the fan is provided with a valve 50, and the flow of the gas entering the heat insulation box is controlled by controlling the opening degree of the valves. The valve 50 may be a manual valve or an automatic solenoid valve.
In this embodiment, the fan can be high temperature resistant frequency conversion fan, high temperature resistant roots's fan, directly allies oneself with water-cooled high temperature fan etc. and the specification of fan can be confirmed according to actual required total amount of wind, for example can select technical parameter for Q3000 Nm3And h, P is 3200Pa high-temperature resistant fan. The heat preservation box body is made of heat preservation and heat resistance materialsIn order to enhance the heat preservation and insulation effect, a heat preservation and insulation layer can be additionally arranged outside the heat preservation box body, and the thickness of the heat preservation and insulation layer outside the existing heat preservation box body is increased. Meanwhile, a sealing plate can be additionally arranged in the heat insulation box body, and high-temperature-resistant heat insulation coating is coated on one side or two sides of the heat insulation sealing plate, wherein the used high-temperature-resistant heat insulation coating is the conventional common coating. The mode of setting up of thermal-insulated closing plate can set up according to the concrete shape of insulation box, for example when the insulation box is the cube, can set up thermal-insulated closing plate in four corners of insulation box, what formed is the heat preservation cavity of a hexagon shape, through the inner space that reduces the insulation box promptly, reduces heating space to reduce the intensification time.
As shown in fig. 3, in one embodiment, the blowing pipe 40 includes a blowing pipe air inlet 4102 and a blowing groove 4101 provided on the blowing pipe, the length, material and pipe diameter of the blowing pipe 40 can be set according to the air volume of the air supply fan, the blowing pipe is provided with the blowing groove 4101, the opening width of the blowing groove 4101 is 5-10mm, the opening of the blowing groove faces the porcelain rotation shaft, the blowing groove is used for a gas outlet for spraying the gas with pressure from the blowing pipe, and the gas outlet is provided in a groove shape, thereby improving the efficiency of blowing. The gas in the blowing pipe is the flue gas of the cleaning electric furnace, the flue gas of the cleaning electric furnace is the flue gas generated by clarifying and separating the high-temperature copper solution, and has high temperature, the temperature is 250-350 ℃, and the SO temperature is2The concentration is lower than 0.2%, the water content is low, the dust content is about 5% -8%, and the dew point is about 140 ℃. I.e. it is typically a high temperature, low dew point gas, suitable for purging a high dew point, high moisture content gas inside a heat retention box in an electric precipitator. Meanwhile, the flue gas of the cleaning furnace is a tail gas, and is introduced into the electric dust collecting system based on flue gas purging, so that the comprehensive utilization of the tail gas is realized, and the energy consumption in the production process is saved.
As shown in fig. 2, in one embodiment, the number of the injection pipes 40 may be one or two, and for example, when two injection pipes are provided, the injection pipes may include a first injection pipe 410 and a second injection pipe 420, wherein the first injection pipe 410 and the second injection pipe 420 are respectively provided on both sides of the porcelain rotation shaft 30, and the installation height of the first injection pipe 410 is higher than that of the second injection pipe 420, but the first injection pipe and the second injection pipe may be provided at the same height position. Through highly setting to one high one low with two jetting pipes, the gas pressure that utilizes jetting pipe spun that can be better promotes the rotation of porcelain pivot, does benefit to blow off and gathers the epaxial smoke and dust of porcelain pivot.
In this embodiment, an angle between the plane where the first blowing pipe and the porcelain rotating shaft are located and the horizontal plane may be defined as "a", an angle a may be set to a value of 45 ° < a <90 °, an angle between the plane where the second blowing pipe and the porcelain rotating shaft are located and the horizontal plane may be defined as "b", and an angle b may be set to less than 45 °.
Specifically, the first injection pipe is arranged in parallel with the porcelain rotating shaft and is arranged above the porcelain rotating shaft, so that the first injection pipe and the porcelain rotating shaft can form a plane, an included angle formed between the plane and the horizontal plane is defined as a, the angle of the angle a is set to be 45-90 degrees, similarly, the included angle between the plane where the second injection pipe and the porcelain rotating shaft are located and the horizontal plane can be defined as b, and the angle b is set to be smaller than 45 degrees. Through the inconsistent angle that sets up two jetting pipes for the direction of the gaseous effect of spun in the jetting pipe is different at the epaxial direction of action of porcelain, and two jetting pipe spun gaseous combined action promote the rotation of porcelain pivot, make to sweep more evenly thoroughly.
In one or more embodiments, the distance between the injection tube and the magnetic shaft can be set to be 0.2-0.5m and 0.3-0.4m, when the distance between the injection tube and the magnetic shaft is less than 0.2m, the distance is close to the ceramic rotating shaft, so that the insulation distance is insufficient, the discharge is easy to occur, the potential safety hazard exists, and when the distance between the injection tube and the ceramic rotating shaft is more than 0.5m, the purging effect is poor due to the long distance.
In some embodiments, the temperature of the depletion furnace flue gas used in the injection lance is 140-300 ℃. Although the temperature of the flue gas of the electric cleaning furnace can reach 250-350 ℃, the temperature of the flue gas entering the heat preservation box body is reduced after a series of dust removal and purification operations, but the temperature of the gas entering the heat preservation box body cannot be lower than 140 ℃, and when the temperature is lower than 140 ℃, the temperature is lower than the dew point of the flue gas of the pizza (the existing smelting flue gas treatment adopts an electric dust collector of the pizza, the flue gas of the pizza is the flue gas in the pizza), the purging effect cannot be achieved.
In one embodiment, the pressure of the flue gas of the electric depletion furnace can be set to 2000Pa-3200 Pa. The requirement that the impoverishment electric stove flue gas gets into the jetting pipe promptly, impoverishment electric stove flue gas will have pressure, if, when impoverishment electric stove flue gas pressure is less than 2000Pa, impoverishment electric stove flue gas through the jetting groove blowout back, when reaching the porcelain pivot, be difficult to with the epaxial laying dust of porcelain pivot clean, also do not be favorable to the rotation of porcelain pivot simultaneously, influence the dust blowing effect, when pressure is higher than 3200Pa, the pressure is too high and just high to the equipment requirement, need set up safety protection measure, simultaneously, because impoverishment electric stove flue gas will pass through the jetting groove blowout, because of the jetting groove opening width is less, when high-pressure draught passes through, the noise that produces is also great.
In summary, the present invention provides an electric dust collecting system based on flue gas purging, including a blower and an electric dust collector device, the electric dust collector device includes: the ceramic rotary shaft blowing device comprises a heat insulation box body for heat insulation, a ceramic rotary shaft arranged in the middle of the heat insulation box body and a blowing pipe for blowing the ceramic rotary shaft; the blowing pipe is connected with the fan through a pipeline, the blowing pipe is arranged above the ceramic rotating shaft and is parallel to the ceramic rotating shaft, a blowing groove for spraying gas is arranged in the length direction of the blowing pipe, and the gas is purified flue gas of the electric dilution furnace. Through jetting pipe and jetting groove, reach certain pressure with high temperature, dry flue gas and sweep the porcelain pivot, make the epaxial dust of porcelain pivot and moisture content take away, ensure the insulating properties of porcelain pivot insulator. Meanwhile, the high dew-point flue gas is expelled out of the heat preservation box body, so that the dew-point temperature and influence of an insulating part in the heat preservation box body are reduced, and energy consumption or power consumption is saved.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides an electric dust collector system based on flue gas sweeps, includes fan, electric dust collector device, its characterized in that, electric dust collector device includes: the ceramic rotary shaft blowing device comprises a heat insulation box body for heat insulation, a ceramic rotary shaft arranged in the middle of the heat insulation box body and a blowing pipe for blowing the ceramic rotary shaft; the blowing pipe is connected with the fan through a pipeline, the blowing pipe is arranged above the ceramic rotating shaft and is parallel to the ceramic rotating shaft, a blowing groove for spraying gas is arranged in the length direction of the blowing pipe, and the gas is purified flue gas of the electric dilution furnace.
2. The electric dust collecting system based on flue gas purging as claimed in claim 1, wherein the blowing pipes comprise a first blowing pipe and a second blowing pipe, the first blowing pipe and the second blowing pipe are respectively arranged on two sides of the porcelain rotating shaft, and the first blowing pipe is higher than the second blowing pipe.
3. The flue gas purging-based electric dust collection system according to claim 2, wherein an opening of the blowing slot faces the porcelain rotating shaft.
4. The electric dust collecting system based on flue gas purging of claim 2, wherein an included angle between a plane where the first injection pipe and the ceramic rotating shaft are located and a horizontal plane is a, and 45 degrees < a <90 degrees, and an included angle between a plane where the second injection pipe and the ceramic rotating shaft are located and the horizontal plane is b, and b is less than 45 degrees.
5. The electric dust collecting system based on flue gas purging of claim 1, wherein the distance between the blowing pipe and the porcelain rotating shaft is 0.2-0.5 m.
6. The electric dust collecting system based on flue gas purging of claim 1, wherein a sealing plate is arranged inside the heat insulation box, and an insulating layer is arranged outside the heat insulation box.
7. The flue gas purge-based electric dust collection system of claim 6, wherein the seal plate is coated with a thermal barrier coating.
8. The flue gas purging-based electric dust collection system as recited in claim 1, wherein the temperature of the flue gas of the electric dilution furnace is 140-300 ℃.
9. The flue gas purging-based electric dust collection system according to claim 8, wherein the pressure of the flue gas of the electric dilution furnace is 2000Pa-3200 Pa.
10. The electric dust collecting system based on flue gas purging of claim 3, wherein the opening width of the blowing slot is 5-10 mm.
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| CN202010475702.0A CN111589584B (en) | 2020-05-29 | 2020-05-29 | Electric dust collection system based on flue gas purging |
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