CN117398793A - Rare earth electrolysis waste gas treatment device - Google Patents
Rare earth electrolysis waste gas treatment device Download PDFInfo
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- CN117398793A CN117398793A CN202311279889.7A CN202311279889A CN117398793A CN 117398793 A CN117398793 A CN 117398793A CN 202311279889 A CN202311279889 A CN 202311279889A CN 117398793 A CN117398793 A CN 117398793A
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- Prior art keywords
- dust
- exhaust gas
- waste gas
- dust removal
- rare earth
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- 239000002912 waste gas Substances 0.000 title claims abstract description 64
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 25
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 23
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 20
- 239000000428 dust Substances 0.000 claims abstract description 130
- 239000007921 spray Substances 0.000 claims abstract description 80
- 239000004744 fabric Substances 0.000 claims abstract description 49
- 239000007789 gas Substances 0.000 claims abstract description 42
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000003513 alkali Substances 0.000 claims description 27
- 238000005507 spraying Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 9
- 238000000926 separation method Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000007664 blowing Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 229910052731 fluorine Inorganic materials 0.000 description 4
- 239000011737 fluorine Substances 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 150000004673 fluoride salts Chemical class 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 239000011552 falling film Substances 0.000 description 1
- 238000003682 fluorination reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 rare earth fluoride Chemical class 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/72—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with backwash arms, shoes or nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a rare earth electrolysis waste gas treatment device, and belongs to the technical field of rare earth electrolysis waste gas treatment. Comprises a dust removal bellows, a dust falling spray tower and an exhaust gas neutralization spray tower; the dust removal bellows comprises a plurality of air suction covers, a dust removal box, an exhaust gas pipeline, a negative pressure pump and a cloth bag structure, wherein one side of the dust removal box is provided with an exhaust gas inlet, and the air suction covers are connected with the exhaust gas inlet; the dust removing box is provided with an exhaust gas outlet, one end of the exhaust gas pipeline is connected with the exhaust gas outlet, the other end of the exhaust gas pipeline is connected with the dust settling spray tower, and the negative pressure pump is arranged on the exhaust gas pipeline; the cloth bag structure is arranged in the dust removing box; the bag structure is arranged in the dust collection box, the bag structure divides the inside of the dust collection box into a dust collection cavity and a waste gas cavity, and the rare earth electrolysis waste gas is discharged from the dust collection box after sequentially passing through the dust collection box, the dust fall spray tower and the dust fall spray tower. Solves the technical problems that a cloth bag dust remover in the traditional electrolytic waste gas treatment device is only suitable for one electrolytic furnace with two positions and is inconvenient for a plurality of electrolytic furnaces on the whole production line to use.
Description
Technical Field
The utility model relates to the technical field of rare earth electrolysis waste gas treatment, in particular to a rare earth electrolysis waste gas treatment device.
Background
At present, a fluoride molten salt electrolysis process is generally adopted in rare earth metal smelting, and a large amount of fluorine-containing tail gas is generated in the electrolysis process and is accompanied by dust containing rare earth elements. Dust and fluorine-containing tail gas generated in the rare earth smelting process can cause serious pollution to the environment if the effective treatment is not carried out. Aiming at the tail gas treatment, the current common practice is a two-stage treatment process, wherein the first stage adopts a cyclone separation or cloth bag dust removal method to collect dust containing rare earth, and the second stage adopts zeolite to absorb or introduce fluorine-containing waste gas into a spray tower to circularly absorb fluorine in the gas with aqueous solution, and the waste gas is discharged after reaching the standard.
The utility model discloses a rare earth fluoride waste gas treatment and rare earth recovery production line with the publication number of CN219441011U, which is characterized in that a plurality of bag-type dust collectors are connected and arranged on the periphery of a fluorination furnace, and solid rare earth is collected through a solid material receiving end arranged at the bottom of the bag-type dust collectors; the exhaust end of the cloth bag dust collector is connected with a plurality of falling film absorption towers and absorption circulating tanks, a circulating pump is arranged outside the absorption circulating tanks, the circulating pump and a valve can control the liquid in the absorption circulating tanks and the peripheral absorption circulating tanks to circulate, the fluorinated gas in the waste gas can be absorbed to the maximum extent, the water washing towers are arranged in cooperation with the absorption circulating tanks, the recovery liquid at the bottoms of the water washing towers flows back into the absorption circulating tanks through pipelines, and hydrofluoric acid is formed after multi-stage water washing for industrial secondary application; the rear side of the water washing tower is connected with a multi-stage neutralization tower, the multi-stage neutralization tower can obtain fluoride salt through alkali liquor supply and reaction, and the recovery of fluoride salt can realize industrial secondary application. Most of traditional bag dust collectors are used, and the traditional bag dust collectors are only suitable for electrolytic furnaces at one or two positions, so that a plurality of electrolytic furnaces on a whole production line are required to be matched with a plurality of bag dust collectors, the cost is high, and the use of a plurality of electrolytic furnaces on the whole production line is inconvenient.
Disclosure of Invention
The utility model aims to solve the problems that a cloth bag dust remover is only suitable for one electrolytic furnace with two positions in the traditional electrolytic waste gas treatment device, a plurality of electrolytic furnaces on a whole production line are required to be matched with a plurality of cloth bag dust removers, the cost is high, and the use of a plurality of electrolytic furnaces on the whole production line is inconvenient.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a rare earth electrolysis waste gas treatment device comprises a dust removal bellows, a dust fall spray tower and a waste gas neutralization spray tower; the dust removal bellows comprises a plurality of air suction covers, a dust removal box, an exhaust gas pipeline, a negative pressure pump and a cloth bag structure, wherein one side of the dust removal box is provided with a plurality of openable and closable exhaust gas inlets, and the air suction covers are connected with the exhaust gas inlets; the dust removing box is provided with an exhaust gas outlet, one end of the exhaust gas pipeline is connected with the exhaust gas outlet, the other end of the exhaust gas pipeline is connected with the dust falling spray tower, and the negative pressure pump is arranged on the exhaust gas pipeline; the cloth bag structure is arranged in the dust removing box; the bag structure is arranged in the dust removal box, the bag structure divides the interior of the dust removal box into a dust collection cavity and an exhaust cavity from top to bottom, the exhaust inlet is communicated with the dust collection cavity, and the exhaust cavity is communicated with the exhaust outlet; the dust removal bellows, the dust fall spray tower with the dust fall spray tower is connected gradually, and rare earth electrolysis waste gas is followed the dust removal bellows passes through in proper order the dust removal bellows, the dust fall spray tower with behind the dust fall spray tower discharges.
Further, the dust removal bellows still includes pulse blowback, pulse blowback includes pressure pipe and a plurality of blowback pipeline, the pressure pipe is followed the dust removal case outside is laid, blowback pipeline one end pass through the on-off valve with the pressure pipe intercommunication, be provided with on the blowback pipeline and stretch into the blowback mouth of sack, the on-off valve is closed after opening by a break time automation.
Further, the cloth bag structure comprises a separation plate and a plurality of groups of cloth bags, wherein a plurality of groups of air passing holes are formed in the separation plate, the first air passing holes are respectively provided with one cloth bag correspondingly, and the plurality of groups of cloth bags are distributed along the length direction of the dust removal box; the cloth bags are vertically arranged, and groups of cloth bags are distributed in an array mode.
Further, the dust fall spray tower comprises a first tower body, a clean water tank and a first spray device, wherein a first water outlet is formed in the lower portion of the first tower body, and a first air outlet pipe is arranged at the top of the first tower body; the waste gas pipeline is connected with the lower part of the first tower body, the clean water tank is arranged outside the first tower body, the first spraying device is connected with the clean water tank, and the first spraying device stretches into the clean water tank and sprays atomized clean water from the top of the clean water tank.
Further, the waste gas neutralization spray tower comprises a second tower body, a base solution tank and a second spray device, wherein a second water outlet is formed in the lower portion of the second tower body, and a second air outlet pipe is arranged at the top of the second tower body; the waste gas pipeline is connected with the lower part of the second tower body, the alkali liquor tank is arranged outside the second tower body, the second spraying device is connected with the alkali liquor tank, and the second spraying device stretches into the alkali liquor tank and sprays atomized alkali liquor from the top of the alkali liquor tank.
Further, the number of the waste gas neutralization spray towers is multiple, the waste gas neutralization spray towers are connected in series, and the number of atomized alkali liquid sprayed by the spray towers positioned at the rear position is smaller than that of atomized alkali liquid sprayed by the spray towers positioned at the front position.
By adopting the technical scheme, the utility model has the beneficial effects that:
1. when the dust removing device is used, air in the dust removing box is blown into the dust removing spray tower and the waste gas neutralization spray tower through the negative pressure pump; waste gas of the electrolytic furnace is sucked into a dust collection cavity of the dust collection box from the air suction cover, and a large amount of dust substances are filtered down through a cloth bag structure and fall down to the dust collection box; the waste gas passing through the cloth bag structure is sprayed in a dust falling spray tower for secondary dust falling, so that the particulate matters in the waste gas are further reduced; and then the waste gas passes through a waste gas neutralization spray tower, acidic substances in the waste gas are neutralized, and the waste gas is discharged after reaching the emission standard. Based on the above, the dust removal case can be set up along a plurality of electrolytic furnace lateral parts in the workshop, and a plurality of induced draft covers one-to-one are used to the electrolytic furnace dust absorption, through one set of dust removal bellows structure and dust fall spray column and waste gas neutralization spray column, realize the exhaust treatment of a plurality of electrolytic furnaces, solve traditional sack cleaner and only be suitable for the electrolytic furnace use of a two positions, a plurality of electrolytic furnaces on the whole production line need adapt a plurality of sack cleaner, and is with high costs, the technical problem that a plurality of electrolytic furnaces on the whole production line of inconvenience used.
2. According to the utility model, the pulse back blower is arranged, so that particles on the cloth bag can be shaken off to the bottom of the dust removal box at regular time through the pulse back blower, the blocking of dust particles on the cloth bag is reduced, and meanwhile, the filtering area of the cloth bag can be increased and the filtering speed can be increased through the cloth bag vertically arranged in an array. The exhaust gas leakage caused by insufficient suction force of the suction hood is prevented; the arrangement of the pressure pulse machine is reduced by the pressure tube arranged along the outer side of the dust removing box.
3. The utility model realizes the multistage neutralization of the waste gas and further reduces the flying-out of acid gas in the waste gas by arranging a plurality of waste gas neutralization spray towers; the spray tower at the rear position sprays atomized alkali liquor, the mesh number of which is smaller than that of the spray tower at the front position, and the water mist particles at the rear position are bigger and fall faster, so that the neutralized water mist is prevented from carrying out a neutralization product, and pollution emission is further carried out.
Drawings
FIG. 1 is a schematic plan view of the present utility model;
FIG. 2 is a schematic diagram of the front view structure of the dust removing bellows of the present utility model;
FIG. 3 is a schematic diagram of the internal structure of the dust removal bellows of the present utility model;
FIG. 4 is a schematic diagram of the opening of a partition board of the cloth bag structure of the present utility model;
FIG. 5 is a schematic diagram of a pulse back blower arrangement of the present utility model.
In the attached drawings, a 1-dust removal air box, a 2-dust fall spray tower, a 3-waste gas neutralization spray tower, a 4-electrolytic furnace, an 11-induced draft hood, a 12-dust removal box, a 13-waste gas pipeline, a 14-negative pressure pump, a 15-cloth bag structure, a 16-pulse back blower, a 21-first tower body, a 22-clean water tank, a 23-first spray device, a 31-second tower body, a 32-alkali liquid tank, a 33-second spray device, a 121-waste gas inlet, a 122-waste gas outlet, a 123-dust collection cavity, a 124-waste gas cavity, a 151-division plate, 152-air passing holes, 153-cloth bags, 161-pressure pipes, 162-back blowing pipelines and 163-on-off valves.
Detailed Description
The following is a further description of the specific embodiments of the utility model with reference to the accompanying drawings.
In the description of the present utility model, it should be understood that the terms "center," "length," "width," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Referring to fig. 1 to 5, a rare earth electrolysis waste gas treatment device comprises a dust removal bellows 1, a dust fall spray tower 2 and a waste gas neutralization spray tower 3; the dust removal bellows 1 comprises a plurality of air suction covers 11, a dust removal box 12, an exhaust pipeline 13, a negative pressure pump 14 and a cloth bag structure 15, wherein one side of the dust removal box 12 is provided with a plurality of openable and closable exhaust gas inlets 121, and the air suction covers 11 are connected with the exhaust gas inlets 121; an exhaust outlet 122 is arranged on the dust removal box 12, one end of an exhaust pipeline 13 is connected with the exhaust outlet 122, the other end is connected with the dust fall spray tower 2, and a negative pressure pump 14 is arranged on the exhaust pipeline 13; the cloth bag structure 15 is arranged in the dust collection box 12; the cloth bag structure 15 is arranged in the dust collection box 12, the cloth bag structure 15 divides the interior of the dust collection box 12 into a dust collection cavity 123 and an exhaust cavity 124 up and down, the exhaust inlet 121 is communicated with the dust collection cavity 123, and the exhaust cavity 124 is communicated with the exhaust outlet 122; the dust removal bellows 1, the dust fall spray tower 2 and the dust fall spray tower 2 are connected in sequence, and rare earth electrolysis waste gas is discharged from the dust removal bellows 1 after passing through the dust removal bellows 1, the dust fall spray tower 2 and the dust fall spray tower 2 in sequence. When in use, the negative pressure pump 14 is used for blowing the air in the dust removing box 12 into the dust removing spray tower 2 and the waste gas neutralization spray tower 3; the waste gas of the electrolytic furnace 4 is sucked into the dust collecting cavity 123 of the dust removing box 12 from the air suction cover 11, and a large amount of dust substances are filtered by the cloth bag structure 15 and fall under the dust removing box 12; the waste gas passing through the cloth bag structure 15 is sprayed in the dust falling spray tower 2 for secondary dust falling, so that the particulate matters in the waste gas are further reduced; and then the waste gas passes through a waste gas neutralization spray tower 3, acidic substances in the waste gas are neutralized, and the waste gas is discharged after reaching the emission standard.
In this embodiment, the dust removal bellows 1 further includes a pulse back-blowing device 16, the pulse back-blowing device 16 includes a pressure pipe 161 and a plurality of back-blowing pipelines 162, the pressure pipe 161 is arranged along the outside of the dust removal bellows 12, one end of the back-blowing pipeline 162 is communicated with the pressure pipe 161 through an on-off valve 163, a back-blowing port extending into the cloth bag 153 is arranged on the back-blowing pipeline 162, and the on-off valve 163 is closed after being opened automatically at intervals of a time interval. By providing the pulse back blower 16, the particulate matter on the cloth bag 153 can be shaken off to the bottom of the dust box 12 at regular time by the pulse back blower 16. The clogging of the cloth bag 153 by dust particles is reduced, and the setting of the pressure pulse machine is reduced by providing the pressure pipe 161 along the outside of the dust removing box 12.
In this embodiment, the cloth bag structure 15 includes a partition plate 151 and a plurality of groups of cloth bags 153, the partition plate 151 is provided with a plurality of groups of air passing holes 152, the first air passing holes 152 are respectively provided with a cloth bag 153 correspondingly, and the plurality of groups of cloth bags 153 are distributed along the length direction of the dust collection box 12; the cloth bags 153 are vertically arranged, and the groups of cloth bags 153 are distributed in an array mode. Specifically, 9 bags 153 are arranged in an array structure of 3*3. Meanwhile, through the cloth bags 153 vertically arranged in the array, the filtering area of the cloth bags 153 can be increased, the filtering speed is increased, and the exhaust gas leakage caused by insufficient suction force of the suction hood 11 is prevented;
in this embodiment, the dust fall spray tower 2 includes a first tower body 21, a clean water tank 22 and a first spray device 23, a first water outlet is provided at the lower part of the first tower body 21, and a first air outlet pipe is provided at the top of the first tower body 21; the waste gas pipeline 13 is connected with the lower part of the first tower body 21, the clean water tank 22 is arranged outside the first tower body 21, the first spraying device 23 is connected with the clean water tank 22, and the first spraying device 23 stretches into the clean water tank 22 and sprays atomized clean water from the top of the clean water tank 22.
In the embodiment, the waste gas neutralization spray tower 3 comprises a second tower body 31, an alkali liquor tank 32 and a second spray device 33, wherein a second water outlet is arranged at the lower part of the second tower body 31, and a second air outlet pipe is arranged at the top of the second tower body 31; the waste gas pipeline 13 is connected with the lower part of the second tower body 31, the alkali liquor tank 32 is arranged outside the second tower body 31, the second spraying device 33 is connected with the alkali liquor tank 32, and the second spraying device 33 stretches into the alkali liquor tank 32 and sprays atomized alkali liquor from the top of the alkali liquor tank 32.
In the embodiment, two waste gas neutralization spray towers 3 are arranged, the two waste gas neutralization spray towers 3 are connected in series, and the number of spray alkali liquid sprayed by the spray tower positioned at the rear position is smaller than that of spray alkali liquid sprayed by the spray tower positioned at the front position. Specifically, the number of the atomizing nozzles at the front position is 1000-2000 meshes, and the number of the atomizing nozzles at the rear position is 400-800 meshes. Through the arrangement of a plurality of waste gas neutralization spray towers 3, the multi-stage neutralization of waste gas is realized, and the flying-out of acid gas in the waste gas is further reduced; the spray tower at the rear position sprays atomized alkali liquor with the mesh number smaller than that of the spray tower at the front position, and the water mist particles at the rear position are bigger and fall faster, so that the neutralized water mist is prevented from carrying out neutralization products, and pollution emission is further carried out.
The foregoing description is directed to the preferred embodiments of the present utility model, but the embodiments are not intended to limit the scope of the utility model, and all equivalent changes or modifications made under the technical spirit of the present utility model should be construed to fall within the scope of the present utility model.
Claims (6)
1. A rare earth electrolysis waste gas treatment device is characterized in that: comprises a dust removal bellows, a dust falling spray tower and an exhaust gas neutralization spray tower; the dust removal bellows comprises a plurality of air suction covers, a dust removal box, an exhaust gas pipeline, a negative pressure pump and a cloth bag structure, wherein one side of the dust removal box is provided with a plurality of openable and closable exhaust gas inlets, and the air suction covers are connected with the exhaust gas inlets; the dust removing box is provided with an exhaust gas outlet, one end of the exhaust gas pipeline is connected with the exhaust gas outlet, the other end of the exhaust gas pipeline is connected with the dust falling spray tower, and the negative pressure pump is arranged on the exhaust gas pipeline; the cloth bag structure is arranged in the dust removing box; the bag structure is arranged in the dust removal box, the bag structure divides the interior of the dust removal box into a dust collection cavity and an exhaust cavity from top to bottom, the exhaust inlet is communicated with the dust collection cavity, and the exhaust cavity is communicated with the exhaust outlet; the dust removal bellows, the dust fall spray tower with the dust fall spray tower is connected gradually, and rare earth electrolysis waste gas is followed the dust removal bellows passes through in proper order the dust removal bellows, the dust fall spray tower with behind the dust fall spray tower discharges.
2. The rare earth electrolysis exhaust gas treatment apparatus according to claim 1, wherein: the dust removal bellows still includes pulse blowback, pulse blowback includes pressure pipe and a plurality of blowback pipeline, the pressure pipe is followed the dust removal case outside is laid, blowback pipeline one end pass through the on-off valve with the pressure pipe intercommunication, be provided with on the blowback pipeline and stretch into the blowback mouth of sack, the on-off valve closes after opening after interval time is automatic.
3. The rare earth electrolysis exhaust gas treatment apparatus according to claim 1, wherein: the cloth bag structure comprises a separation plate and a plurality of groups of cloth bags, wherein the separation plate is provided with a plurality of groups of air passing holes, the first air passing holes are respectively provided with one cloth bag correspondingly, and the plurality of groups of cloth bags are distributed along the length direction of the dust removal box; the cloth bags are vertically arranged, and groups of cloth bags are distributed in an array mode.
4. The rare earth electrolysis exhaust gas treatment apparatus according to claim 1, wherein: the dust fall spray tower comprises a first tower body, a clean water tank and a first spray device, wherein a first water outlet is formed in the lower portion of the first tower body, and a first air outlet pipe is arranged at the top of the first tower body; the waste gas pipeline is connected with the lower part of the first tower body, the clean water tank is arranged outside the first tower body, the first spraying device is connected with the clean water tank, and the first spraying device stretches into the clean water tank and sprays atomized clean water from the top of the clean water tank.
5. The rare earth electrolysis exhaust gas treatment apparatus according to claim 1, wherein: the waste gas neutralization spray tower comprises a second tower body, an alkali solution tank and a second spray device, wherein a second water outlet is formed in the lower portion of the second tower body, and a second air outlet pipe is arranged at the top of the second tower body; the waste gas pipeline is connected with the lower part of the second tower body, the alkali liquor tank is arranged outside the second tower body, the second spraying device is connected with the alkali liquor tank, and the second spraying device stretches into the alkali liquor tank and sprays atomized alkali liquor from the top of the alkali liquor tank.
6. The rare earth electrolysis exhaust gas treatment apparatus according to claim 5, wherein: the waste gas neutralization spray towers are connected in series, and the number of atomized alkali liquid sprayed by the spray towers at the rear position is smaller than that of atomized alkali liquid sprayed by the spray towers at the front position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311279889.7A CN117398793A (en) | 2023-09-28 | 2023-09-28 | Rare earth electrolysis waste gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311279889.7A CN117398793A (en) | 2023-09-28 | 2023-09-28 | Rare earth electrolysis waste gas treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117398793A true CN117398793A (en) | 2024-01-16 |
Family
ID=89486284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311279889.7A Pending CN117398793A (en) | 2023-09-28 | 2023-09-28 | Rare earth electrolysis waste gas treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117398793A (en) |
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2023
- 2023-09-28 CN CN202311279889.7A patent/CN117398793A/en active Pending
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