CN115921113A - Radioactive tail gas dust removal device and method - Google Patents
Radioactive tail gas dust removal device and method Download PDFInfo
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- CN115921113A CN115921113A CN202211418409.6A CN202211418409A CN115921113A CN 115921113 A CN115921113 A CN 115921113A CN 202211418409 A CN202211418409 A CN 202211418409A CN 115921113 A CN115921113 A CN 115921113A
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- 239000002699 waste material Substances 0.000 claims abstract description 22
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- 239000013618 particulate matter Substances 0.000 claims abstract description 9
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The invention discloses a radioactive tail gas dust removal device and a method, and relates to the technical field of radioactive waste volume reduction treatment; dust collector includes: the upper end of the cloth bag dust chamber is provided with an exhaust chamber; the filter cloth bag is arranged in the cloth bag dust removing chamber and is used for filtering particulate matters in the tail gas; the plasma electrostatic dust collection assembly comprises a cathode plate and an anode plate, and the cathode plate and the anode plate are respectively arranged at two sides of the filtering cloth bag; the ash bucket, the upper end with the sack clean room links to each other, is used for collecting the filter cloth bag with the particulate matter of anode plate filtering, by high-voltage static reinforcing filter effect, reduce the load of filtering the cloth bag, the life of extension filter cloth bag improves filtration efficiency and filter effect to reduce the secondary waste because change the sack and produce. The dust removal method is based on the dust removal device, the load of the filter cloth bag can be reduced, the generation of secondary waste can be reduced, the service life of the filter cloth bag is prolonged, and the filtering efficiency and the filtering effect are improved.
Description
Technical Field
The invention relates to the technical field of radioactive waste volume reduction treatment, in particular to a radioactive tail gas dust removal device and method.
Background
The radioactive waste treatment by the heat treatment can achieve the best volume reduction and weight reduction effect to meet the waste minimization principle. The radioactive waste will generate process off-gas during the volume reduction heat treatment process, similar to the common waste heat treatment process. The treated tail gas generated in the volume-reducing heat treatment process of the existing heat-treated radioactive waste also contains radioactivity, and is different from common dust removal equipment. Most of the existing tail gas dust removal devices adopt dust removal cloth bags for dust removal, so that the tail gas dust removal device is large in size, easy to block the cloth bags, low in filtering efficiency and high in replacement frequency of filtering elements.
Disclosure of Invention
Aiming at the technical problems of low filtering efficiency and high replacement frequency of filtering elements of the existing tail gas dust removing device; the invention provides a radioactive tail gas dust removal device and a method, wherein a plasma electrostatic dust removal assembly is arranged in a dust removal chamber to combine plasma electrostatic dust removal with cloth bag dust removal, the high-voltage static electricity enhances the filtering effect, the load of a filtering cloth bag is reduced, the service life of the filtering cloth bag is prolonged, the filtering efficiency is improved, and secondary waste generated by replacing the cloth bag is reduced.
The invention is realized by the following technical scheme:
in a first aspect, the present invention provides a radioactive tail gas dust removal device, including: the upper end of the cloth bag dust chamber is provided with an exhaust chamber; the filter cloth bag is arranged in the cloth bag dust removal chamber and is used for filtering particulate matters in the tail gas; the plasma electrostatic dust collection assembly comprises a cathode plate and an anode plate, and the cathode plate and the anode plate are respectively arranged at two sides of the filtering cloth bag; and the upper end of the ash bucket is connected with the cloth bag dust removal chamber and is used for collecting the particulate matters filtered by the filter cloth bag and the anode plate.
Knoing is, and current tail gas dust collector mostly directly adopts the dust removal sack to remove dust, and not only the volume is great, and the sack blocks up easily, and filtration efficiency is low, and filters the change frequency of original paper high.
The radioactive tail gas dust removal device provided by the invention is characterized in that a plasma electrostatic dust removal assembly is arranged in the cloth bag dust removal chamber, a cathode plate and an anode plate of the plasma electrostatic dust removal assembly are respectively arranged at two sides of the filtering cloth bag, and the plasma electrostatic dust removal assembly has adjustable voltage and current and adjustable electrostatic treatment effect in the treatment process.
When the dust-containing radioactive tail gas enters the bag-type dust removing chamber, the dust-containing radioactive waste heat treatment tail gas firstly passes through an electric field of the plasma electrostatic dust removing assembly, in the electric field of the plasma electrostatic dust removing assembly, the negative plate discharges electricity, so that dust in the tail gas is charged, the dust is favorably condensed, the dust is adsorbed to the positive plate and the polar line under the action of electrostatic force, namely, the positive plate is used as a dust collecting polar plate, the tail gas passing through the plasma electrostatic dust removing assembly enters the filtering bag for dust removal, and clean flue gas is discharged into the exhaust chamber through the bag-type dust removing chamber and then is discharged.
Therefore, the plasma electrostatic dust collection and the cloth bag dust collection are combined, the high-voltage static electricity enhances the filtering effect, the load of the filtering cloth bag is reduced, the service life of the filtering cloth bag is prolonged, the filtering efficiency and the filtering effect are improved, secondary wastes generated by replacing the cloth bag are reduced, and the operation and maintenance cost is reduced.
In an optional embodiment, the card is equipped with on the sack clean room, the card lower extreme can be dismantled and be connected with a plurality of cages bone, the cage bone is used for dismantling the suit filter the sack, filter the sack cover and establish outside the cage bone, can avoid filtering the sack and draw in under the pressure action and influence the filter effect, and the cage bone can be dismantled with the card and be connected, is convenient for filter the installation and the change of sack.
In an optional embodiment, the bag dust chamber is adapted with a blowing pipe and an exhaust pipe, so that compressed gas in a direction opposite to the filtering direction can be input into the filtering bag, and the purpose of back flushing is achieved.
In an alternative embodiment, a rapper is also included, the rapper being used to rap the anode plate so as to shake off the particles attached to the anode plate and the polar line.
In an optional embodiment, be equipped with the baffle that can overturn between sack clean room with the ash bucket, the baffle is used for communicateing or blocking the sack clean room with the connection between the ash bucket, separates sack clean room and ash bucket through the baffle, is convenient for maintain and change the parts in the sack clean room to ensure operating personnel's safety and the normal operating of equipment.
In an alternative embodiment, the hopper is adapted with a wall vibrator to shake off particles attached to the side wall of the hopper, thereby preventing the particles from remaining on the side wall of the hopper during dust discharge.
In an optional embodiment, the ash bucket is adapted with a heater, so that the ash bucket is heated by the heater to prevent the particles in the ash bucket from moisture absorption and hardening.
In a second aspect, the invention provides a radioactive tail gas dust removal method, which is based on the radioactive tail gas dust removal device and comprises the following steps:
introducing tail gas generated by the thermal treatment of the radioactive waste into a bag-type dust chamber, and sequentially carrying out dust removal through a plasma electrostatic dust removal assembly and a filter bag.
The invention discharges the radioactive waste gas containing dust into the bag-type dust chamber, the plasma electrostatic dust-collecting component discharges to charge the dust in the tail gas, the dust is absorbed on the anode plate and the polar line under the action of electrostatic force, namely the anode plate is used as the dust-collecting polar plate, the tail gas passing through the plasma electrostatic dust-collecting component enters the filtering bag for dust collection, and the clean smoke is discharged into the clean air chamber through the bag-type dust chamber for discharge, therefore, the load of the filtering bag can be reduced, the service life of the filtering bag is prolonged, the filtering efficiency and the filtering effect are improved, the secondary waste generated by replacing the bag is reduced, and the operation and maintenance cost is reduced.
In an optional embodiment, the method further comprises the following steps:
monitoring the internal pressure difference of the bag dust chamber in real time, and comparing the pressure difference with a set threshold value;
when the pressure difference reaches a first set value, compressed air is introduced to the filter cloth bag and the anode plate through the blowback pipe for blowback, and filtered particles are collected through the ash bucket;
monitoring the weight of the particulate matters in the ash bucket in real time, and comparing the weight of the particulate matters with a set value;
when the weight of the particles reaches a set value, discharging the particles in the ash bucket into a collection container;
and when the pressure difference reaches a second set value, replacing the filtering cloth bag.
By detecting the internal pressure difference of the bag type dust chamber and comparing the internal pressure difference with the first set value, the reduction of the dust removing capacity of the bag type dust chamber can be timely found, the back flushing can be timely conveniently carried out, the dust removing capacity of the filtering bag can be recovered, the normal operation of the dust removing process can be ensured, and the dust removing efficiency can be further ensured. Meanwhile, the internal pressure difference of the cloth bag dust chamber is detected and compared with a second set value, so that the phenomenon that the filtering cloth bag bears overlarge pressure difference to cause the breakage of the filtering cloth bag and the damage of a supporting structure, and the filtering effect is reduced is avoided.
Specifically, the process of replacing the filter cloth bag comprises the following steps:
s30, after the back flushing and dust removing steps are executed, controlling a partition plate to separate the bag dust removing chamber from the ash bucket;
s31, opening an access window in a negative pressure state in the cloth bag dust removal chamber;
s32, taking out the cage bones in the filter cloth bag, and then unloading the waste filter cloth bag from the flower bed plate opening;
s33, installing a new filter cloth bag to the flower plate, and putting the cage bones into the corresponding filter cloth bag again;
and S34, closing the access panel and resetting the partition plate.
Through blowback and dust removal step, can be with the particulate matter in the clean room discharge in the ash bucket to separate sack clean room and ash bucket through the baffle, can separate radioactive substance and sack clean room, thereby make the maintenance and the change of bag clean room inner part go on under nonradioactive environment, ensure operating personnel's safety and avoid filtering the thing and escape.
Compared with the prior art, the invention has the following advantages and beneficial effects
1. The radioactive tail gas dust removal device provided by the invention is characterized in that a plasma electrostatic dust removal assembly is arranged in a cloth bag dust removal chamber, a cathode plate and an anode plate of the plasma electrostatic dust removal assembly are respectively arranged at two sides of a filter cloth bag, when dust-containing radioactive tail gas enters the cloth bag dust removal chamber, the dust-containing radioactive waste heat treatment tail gas firstly passes through an electric field of the plasma electrostatic dust removal assembly, the cathode plate discharges in the electric field of the plasma electrostatic dust removal assembly, so that dust in the tail gas is charged, the dust is adsorbed onto the anode plate and a polar line under the action of electrostatic force, namely the anode plate is used as a dust collection polar plate, the tail gas passing through the plasma electrostatic dust removal assembly enters the filter cloth bag for dust removal, and clean flue gas is discharged into a clean gas chamber through the cloth bag dust removal chamber.
2. The radioactive tail gas dust removal method provided by the invention is based on the device, dust-containing radioactive waste gas is discharged into the bag-type dust removal chamber, the plasma electrostatic dust removal assembly discharges electricity to enable dust in the tail gas to be charged, the dust is adsorbed onto the anode plate and the polar line under the action of electrostatic force, namely, the anode plate is used as a dust collection polar plate, the tail gas passing through the plasma electrostatic dust removal assembly enters the filter bag to be subjected to dust removal, and clean flue gas is discharged into the gas purification chamber through the bag-type dust removal chamber to be discharged, so that the load of the filter bag can be reduced, the service life of the filter bag is prolonged, the filter efficiency and the filter effect are improved, secondary waste generated by replacing the bag is reduced, and the operation and maintenance cost is reduced.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
In the drawings:
FIG. 1 is a schematic structural diagram of a front view of a radioactive tail gas dust removal device according to an embodiment of the present invention;
FIG. 2 is a schematic side view of a radioactive tail gas dust collector according to an embodiment of the present invention;
FIG. 3 is a schematic top view of a clean room according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of a radioactive tail gas dedusting method according to an embodiment of the present invention.
Reference numbers and corresponding part names in the drawings:
1-a cloth bag dust removal chamber, 2-an exhaust chamber, 3-an air inlet chamber, 4-a filter cloth bag, 5-a cathode plate, 6-an anode plate, 7-an ash bucket, 8-a flower plate, 9-a cage bone, 10-an injection tube, 11-an exhaust tube, 12-a vibrator, 13-a partition plate, 14-a dust collection box, 15-a waste cloth bag barrel, 16-a glove box and 17-a gas uniform distributor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present application, the terms "central," "upper," "lower," "left," "right," "vertical," "longitudinal," "lateral," "horizontal," "inner," "outer," "front," "rear," "top," "bottom," and the like refer to orientations or positional relationships that are conventionally used in the manufacture of the present application, or that are routinely understood by those of ordinary skill in the art, but are merely used to facilitate the description and to simplify the description and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered limiting of the present application.
Example 1
With reference to fig. 1, the present embodiment provides a radioactive tail gas dust removal device, including: the upper end of the cloth bag dust chamber 1 is provided with an exhaust chamber 2; the filter cloth bag 4 is arranged in the cloth bag dust chamber 1 and is used for filtering particles in the tail gas; the plasma electrostatic dust collection assembly comprises a cathode plate 5 and an anode plate 6, wherein the cathode plate 5 and the anode plate 6 are respectively arranged at two sides of the filter cloth bag 4; and the upper end of the ash bucket 7 is connected with the cloth bag dust removal chamber 1 and is used for collecting the particulate matters filtered by the filter cloth bag 4 and the anode plate 6.
Specifically, the bag-type dust chamber 1 is a closed cavity, and in order to ensure that the side wall of the bag-type dust chamber 1 can play a role in shielding radiation, a metal material is usually adopted to enclose the bag-type dust chamber 1. In this embodiment, a bag-type dust chamber 1 is formed by 316L stainless steel to ensure the corrosion resistance of the device in radioactive environment.
It should be understood that the plasma electrostatic precipitator assembly and the filter cloth bag 4 constitute one filter unit, and the dust filter unit includes at least one plasma electrostatic precipitator assembly and at least one filter cloth bag 4. Typically, a plurality of filter cloth bags 4 are provided between a set of cathode plates 5 and anode plates 6.
Combine fig. 1 and fig. 3, 1 upper end in sack clean room is equipped with card 8, 8 lower extremes of card can be dismantled and be connected with a plurality of cages bone 9, the suit can be dismantled to cage bone 9 be used for dismantling the suit filter sack 4, filter sack 4 cover is established outside cage bone 9, can avoid filter sack 4 to draw in under the pressure effect and influence the filter effect, and cage bone 9 can be dismantled with card 8 and be connected, is convenient for filter sack 4's installation and change.
The flower plate 8 is a plate provided with a plurality of mounting holes for mounting the filter cloth bag 4, and is usually located above the cloth bag dust removal chamber 1, so that the exhaust chamber 2 is isolated in the cloth bag dust removal chamber 1, and the cathode plate 5 and the anode plate 6 are located below the flower plate 8. An air inlet chamber 3 is further arranged on one side of the cloth bag dust removal chamber 1, and an air distributor 17 is adapted in the air inlet chamber 3 to ensure that the radioactive tail gas can be equalized in pressure and passes through each filtering unit.
For the filtering cloth bag 4, a table with a detachable bag opening is arranged in the mounting hole corresponding to the flower plate 8 and is sleeved outside the cage 9. In order to ensure the applicability of the filter cloth bag 4 to the high-temperature smoke environment and to improve the service life of the filter cloth bag 4, in this example, the filter cloth bag 4 is made of a full PTFE (polytetrafluoroethylene) film coating material.
On the basis, the bag dust chamber 1 is matched with a blowing pipe 10 and an exhaust pipe 11, so that compressed gas in the direction opposite to the filtering direction can be input into the filtering bag 4, and the purpose of back flushing is achieved. Switch valves are usually adapted to the injection pipe 10 and the exhaust pipe 11 so as to control the on/off of the air path, and the injection pipe 10 should be capable of performing back blowing on the inner cavity of each filter cloth bag 4.
In this embodiment, a rapper 12 is also included, said rapper 12 being used to rap said anode plate 6 in order to shake off the particles adhering to the anode plate 6 and to the polar lines. In this embodiment, a rapper 12 is also provided for rapping the filter cloth bag 4, in order to shake off the particulate matter adhering to the cloth bag. It should be noted that the position of the rapping device 12 is not particularly limited, and the root cloth bag can be arranged at different positions of the front, middle, rear and end of the cloth bag system.
Further, sack clean room 1 with be equipped with baffle 13 that can overturn between the ash bucket 7, baffle 13 is used for the intercommunication or blocks sack clean room 1 with connection between ash bucket 7 separates sack clean room 1 and ash bucket 7 through baffle 13, is convenient for maintain and change the part in the sack clean room 1 to ensure operating personnel's safety and the normal operating of equipment.
Meanwhile, the dust hopper 7 is adapted with a wall vibration device so as to shake off the particles attached to the side wall of the dust hopper 7, thereby preventing the particles from remaining on the side wall of the dust hopper 7 during dust exhaust.
And the ash bucket 7 is adapted with a heater, such as an electric heater, so that the ash bucket 7 is heated by the heater to prevent the particulate matters in the ash bucket 7 from moisture absorption and hardening.
Knoing is, and current tail gas dust collector mostly directly adopts the dust removal sack to remove dust, and not only the volume is great, and the sack blocks up easily, and filtration efficiency is low, and filters the change frequency of original paper high.
The radioactive tail gas dust removal device provided by the embodiment is characterized in that a plasma electrostatic dust removal assembly is arranged in the cloth bag dust removal chamber 1, a cathode plate 5 and an anode plate 6 of the plasma electrostatic dust removal assembly are respectively arranged on two sides of the filter cloth bag 4, and in the processing process of the plasma electrostatic dust removal assembly, the voltage and the current are adjustable, and the electrostatic processing effect is adjustable.
When the dust-containing radioactive tail gas enters the cloth bag dust removing chamber 1, the dust-containing radioactive waste heat treatment tail gas firstly passes through an electric field of the plasma electrostatic dust removing component, the negative plate 5 discharges in the electric field of the plasma electrostatic dust removing component to enable dust in the tail gas to be charged so as to be beneficial to dust condensation, the dust is adsorbed to the positive plate 6 and a polar line under the action of electrostatic force, namely the positive plate 6 is used as a dust collecting polar plate, the tail gas passing through the plasma electrostatic dust removing component enters the filtering cloth bag 4 for dust removal, and clean flue gas is discharged after being discharged into the exhaust chamber 2 through the cloth bag dust removing chamber 1.
That is, in the cloth bag dust chamber 1, the dust-containing gas is ionized by a high-voltage strong electric field, the charged dust is adhered to the polar plate and the polar line under the action of the electric field force, the polar plate and the polar line are vibrated by the vibrator 12 to remove the dust, and the dust falls into the lower dust hopper 7 to be collected. After electrostatic dust collection, tail gas enters the filter cloth bag 4, the tail gas enters the exhaust chamber 2 after being filtered by the filter cloth bag 4, the purified tail gas in the exhaust chamber 2 is exhausted through the exhaust vent, the filtration of the tail gas is completed, and dust in the tail gas remains on the outer surface of the filter cloth bag 4.
In conclusion, in the embodiment, the plasma electrostatic dust collection is combined with the bag dust collection, the high-voltage static electricity enhances the filtering effect, reduces the load of the filtering bag 4, prolongs the service life of the filtering bag 4, improves the filtering efficiency and the filtering effect, reduces the secondary waste generated by replacing the filtering bag, and reduces the operation and maintenance cost.
Example 2
With reference to fig. 4, the present embodiment provides a method for removing dust from radioactive tail gas, based on the radioactive tail gas dust removal device described in embodiment 1, including the following steps:
introducing tail gas generated by the thermal treatment of the radioactive waste into a cloth bag dust removing chamber 1, and sequentially performing dust removal through a plasma electrostatic dust removing assembly and a filter cloth bag 4.
Specifically, the dust-containing radioactive waste gas is discharged into the cloth bag dust removing chamber 1, the plasma electrostatic dust removing assembly discharges electricity to enable dust in the tail gas to be charged, the dust is adsorbed onto the anode plate 6 and the polar line under the action of electrostatic force, namely, the anode plate 6 is used as a dust collecting polar plate, the tail gas passing through the plasma electrostatic dust removing assembly enters the filter cloth bag 4 to be removed in a dust mode, and clean flue gas is discharged into the air purifying chamber through the cloth bag dust removing chamber 1 to be discharged out, so that the load of the filter cloth bag 4 can be reduced, the service life of the filter cloth bag 4 is prolonged, the filtering efficiency and the filtering effect are improved, secondary waste generated by replacing the cloth bag is reduced, and the operation and maintenance cost is reduced.
Monitoring the internal pressure difference of the bag dust chamber 1 in real time, and comparing the pressure difference with a set threshold value;
when the pressure difference reaches a first set value, compressed air is introduced to the filter cloth bag 4 and the anode plate 6 through the blowback pipe for blowback, and filtered particles are collected through the ash bucket 7;
monitoring the weight of the particles in the ash bucket 7 in real time, and comparing the weight of the particles with a set value;
when the weight of the particles reaches a set value, discharging the particles in the ash bucket 7 into a collection container;
when the pressure difference reaches a second set value (0.05-0.1 Mpa), the filter cloth bag 4 is replaced.
Wherein, the dust that remains on filtering sack 4 surface can form the filter cake, forms pressure differential in sack clean room 1 (card 8 both sides), when the pressure differential in sack clean room 1 reaches the setting value, opens the pneumatic valve, lets in compressed air to each filtering sack 4 and anode plate 6 through jetting pipe 10, carries out the blowback. The particles attached to the outside of the filter cloth bag 4 and the anode plate 6 naturally fall into the ash bucket 7, so that the filter cloth bag 4 and the anode plate 6 are recovered to a good working state. And after the back flushing is finished, closing the compressed air valve and closing the pneumatic valve matched with the cloth bag dust removal chamber 1.
After the back flushing treatment, particulate matters generated by back flushing are accumulated in the ash hopper 7, a certain mass of dust is gradually deposited in the ash hopper 7, and when the weight of the dust reaches a set value, the dust removal communication valve is automatically opened, so that the dust in the ash hopper 7 enters a collection container (a dust collection box 14). And then the dust enters a dust metering work box through a particulate matter conveying device, a dust removal bag is arranged in the dust metering work box, when the dust amount in the dust metering work box reaches a set value, the particulate matter conveying device is stopped, an inlet cover plate valve of the dust metering work box is closed, the dust removal bag in the dust metering work box is packaged, and the dust removal bag filled with dust is moved out through the lower end of the dust metering work box. Conveying the ash removing bag to a dust temporary storage place. Then, a cover plate at the lower end of the dust metering work box is closed, a new ash removal bag is automatically placed at the upper port/cover plate of the dust metering work box, an inlet valve of the work box is opened, and a particulate matter conveying device is opened to carry out next ash metering and collecting operation.
And, through detecting the internal pressure difference of the bag type dust chamber 1 and comparing the internal pressure difference with the first set value, the dust removal capacity of the bag type dust chamber 1 can be found to be reduced in time, the back flushing can be conveniently carried out in time, and the dust removal capacity of the filtering bag 4 is recovered, so that the normal operation of the dust removal process is ensured, and the dust removal efficiency is further ensured. Meanwhile, the internal pressure difference of the cloth bag dust chamber 1 is detected and compared with a second set value, so that the phenomenon that the filtering cloth bag 4 is subjected to overlarge pressure difference to cause the breakage of the filtering cloth bag 4 and the damage of a supporting structure, and the filtering effect is reduced is avoided.
In addition, the process of replacing the filter cloth bag 4 comprises the following steps:
s30, after the back flushing and dust removing steps are executed, the bag-type dust removing chamber 1 is separated from the ash bucket 7 by the control partition plate 13;
s31, opening an access window when the inside of the cloth bag dust chamber 1 is in a negative pressure state;
s32, taking out the cage ribs 9 in the filter cloth bag 4, and then unloading the waste filter cloth bag 4 from the opening of the pattern plate 8;
s33, installing a new filter cloth bag 4 to the flower plate 8, and putting the cage ribs 9 into the corresponding filter cloth bag 4 again;
and S34, closing the access panel and resetting the partition plate 13.
Through blowback and dust removal step, can be with the particulate matter in the clean room discharge in the ash bucket 7 to separate sack clean room 1 and ash bucket 7 through baffle 13, can separate radioactive substance and sack clean room 1, thereby make the maintenance and the change of sack clean room inner part go on under nonradioactive environment, ensure operating personnel's safety and avoid filtering the thing and escape.
Specifically, when the filter bag 4 is broken or the filter bag 4 is operated for a predetermined replacement time (usually, at least once a year), the filter bag 4 needs to be replaced. When the filter cloth bag 4 is replaced, firstly, all operations of the particle collection end, namely, the back flushing and ash removing steps, are required to be completed, after the dust in the ash bucket 7 is confirmed to completely enter the dust collection chamber, the partition plate 13 is controlled to turn over, and the cloth bag dust removal area is separated from the ash bucket 7 and the fly ash collection box unit.
With reference to fig. 3, after the cloth bag dust removal chamber 1 is ensured to be in a negative pressure state, the top access hole is opened, the cage ribs 9 in the filter cloth bag 4 are taken out, the waste filter cloth bag 4 is dismounted from the flower plate 8, so that the waste filter cloth bag 4 automatically falls onto the turnover partition plate 13, and meanwhile, the waste filter cloth bag 4 on the turnover partition plate 13 is dragged/pushed into the waste cloth bag barrel 15 on the side through the dust removal device middle side surface dust removal glove box 16, so that the waste filter cloth bag 4 automatically falls into the waste cloth bag barrel 15. When the waste cloth bag barrel 15 is filled with the filter cloth bag 4, the waste cloth bag barrel 15 is covered with a cover and then moved out, and the waste cloth bag barrel is moved into an empty barrel from the other side face.
And (3) sequentially installing new filter cloth bags 4 to the pattern plate 8 in the overhaul region, putting cage ribs 9 into the corresponding filter cloth bags 4 again, closing the overhaul door, and simultaneously putting down the turnover type partition plate 13 for resetting, so that the dust removal cloth bag chamber is communicated with the inner cavity of the ash bucket 7.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a radioactive tail gas dust collector which characterized in that includes:
a cloth bag dust chamber (1), an exhaust chamber (2) is arranged at the upper end of the cloth bag dust chamber;
the filtering cloth bag (4) is arranged in the cloth bag dust removing chamber (1) and is used for filtering particulate matters in the tail gas;
the plasma electrostatic dust collection assembly comprises a cathode plate (5) and an anode plate (6), wherein the cathode plate (5) and the anode plate (6) are respectively arranged on two sides of the filtering cloth bag (4);
and the upper end of the ash bucket (7) is connected with the cloth bag dust removal chamber (1) and is used for collecting the particulate matters filtered by the filtering cloth bag (4) and the anode plate (6).
2. The radioactive tail gas dust removal device according to claim 1, wherein a pattern plate (8) is arranged at the upper end of the cloth bag dust removal chamber (1), a plurality of cages (9) are detachably connected to the lower end of the pattern plate (8), and the cages (9) are used for detachably sleeving the filter cloth bag (4).
3. Radioactive exhaust gas dust removal device according to claim 1, characterized in that the bag house (1) is fitted with a blowing pipe (10) and an exhaust pipe (11).
4. The radioactive exhaust gas dust removal device according to claim 1, further comprising a rapper (12), wherein the rapper (12) is used for rapping the anode plate (6).
5. The radioactive tail gas dust removal device according to any one of claims 1 to 4, wherein a reversible partition plate (13) is arranged between the bag dust removal chamber (1) and the ash bucket (7), and the partition plate (13) is used for communicating or blocking the connection between the bag dust removal chamber (1) and the ash bucket (7).
6. Radioactive exhaust gas dedusting apparatus according to claim 5, characterized in that the ash hopper (7) is adapted with a wall resonator.
7. The radioactive exhaust gas dedusting device according to claim 5, characterized in that the ash hopper (7) is adapted with a heater.
8. A radioactive tail gas dust removal method is characterized in that the radioactive tail gas dust removal device based on any one of claims 1 to 7 comprises the following steps:
tail gas generated by the thermal treatment of the radioactive waste is introduced into the cloth bag dust removing chamber (1) and is subjected to dust removal sequentially through the plasma electrostatic dust removing component and the filtering cloth bag (4).
9. The radioactive tail gas dedusting method according to claim 8, further comprising the steps of:
monitoring the internal pressure difference of the bag dust chamber (1) in real time, and comparing the pressure difference with a set threshold value;
when the pressure difference reaches a first set value, compressed air is introduced to the filter cloth bag and the anode plate (6) through the blowback pipe for blowback, and filtered particles are collected through the ash bucket (7);
monitoring the weight of the particulate matters in the ash bucket (7) in real time, and comparing the weight of the particulate matters with a set value;
when the weight of the particulate matter reaches a set value, discharging the particulate matter in the ash bucket (7) into a collection container;
and when the pressure difference reaches a second set value, replacing the filter cloth bag (4).
10. The radioactive tail gas dust removal method according to claim 9, wherein the process of replacing the filter cloth bag (4) comprises the steps of:
s30, after the back flushing and dust removing steps are executed, a control partition plate (13) separates the cloth bag dust removing chamber (1) from the ash bucket (7);
s31, opening an access window when the interior of the cloth bag dust chamber (1) is in a negative pressure state;
s32, taking out the cage ribs (9) in the filter cloth bag (4), and then unloading the waste filter cloth bag from the opening of the pattern plate (8);
s33, installing a new filter cloth bag (4) to the position of the pattern plate (8), and putting the cage ribs (9) into the corresponding filter cloth bag (4) again;
s34, closing the access panel and resetting the partition plate (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211418409.6A CN115921113A (en) | 2022-11-14 | 2022-11-14 | Radioactive tail gas dust removal device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211418409.6A CN115921113A (en) | 2022-11-14 | 2022-11-14 | Radioactive tail gas dust removal device and method |
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| CN115921113A true CN115921113A (en) | 2023-04-07 |
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| CN202211418409.6A Pending CN115921113A (en) | 2022-11-14 | 2022-11-14 | Radioactive tail gas dust removal device and method |
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| KR20040101806A (en) * | 2003-05-27 | 2004-12-03 | 엘지건설 주식회사 | Method and apparatus for removing the dust by using dielectric barrier discharge |
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| CN114420336A (en) * | 2021-12-20 | 2022-04-29 | 核工业西南物理研究院 | System and method for treating radioactive waste through plasma high-temperature pyrolysis and melting |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200207679Y1 (en) * | 2000-08-08 | 2000-12-15 | 한국중공업주식회사 | Combined Equipment with Plasma Reactor for Treatment of Hazardous Gas and Electrostatic Precipitator for Collection of Fly-ash and Byproducts |
| KR20040101806A (en) * | 2003-05-27 | 2004-12-03 | 엘지건설 주식회사 | Method and apparatus for removing the dust by using dielectric barrier discharge |
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