CN211069544U - Naphthalene series water reducing agent workshop exhaust gas purification system - Google Patents
Naphthalene series water reducing agent workshop exhaust gas purification system Download PDFInfo
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- CN211069544U CN211069544U CN201921521423.2U CN201921521423U CN211069544U CN 211069544 U CN211069544 U CN 211069544U CN 201921521423 U CN201921521423 U CN 201921521423U CN 211069544 U CN211069544 U CN 211069544U
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- naphthalene
- chimney
- tank
- condensation
- recovery unit
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- 238000000746 purification Methods 0.000 title claims abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 32
- 150000002790 naphthalenes Chemical class 0.000 title claims description 7
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims abstract description 76
- 238000011084 recovery Methods 0.000 claims abstract description 43
- 238000009833 condensation Methods 0.000 claims abstract description 40
- 230000005494 condensation Effects 0.000 claims abstract description 40
- 239000002912 waste gas Substances 0.000 claims abstract description 33
- 239000007789 gas Substances 0.000 claims abstract description 27
- 239000007921 spray Substances 0.000 claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 21
- 238000005507 spraying Methods 0.000 claims description 18
- 238000012544 monitoring process Methods 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- 238000005070 sampling Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 4
- 239000000155 melt Substances 0.000 claims 1
- 238000012806 monitoring device Methods 0.000 claims 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 3
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 abstract description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 2
- 238000004332 deodorization Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000004568 cement Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a naphthalene water reducing agent workshop exhaust gas purification system, including melt naphthalene tank, gas collecting channel, recovery pond, condensation recovery unit, spray recovery unit, pressure boost centrifugal fan, photochemical treatment device, waste gas flue pipe and chimney, the gas collecting channel set up in melt the naphthalene tank top in order to absorb melt the steam that the naphthalene tank produced, gas collecting channel, condensation recovery unit, spray recovery unit, pressure boost centrifugal fan, photochemical treatment device and chimney set gradually along the steam emission direction; the photochemical treatment device can efficiently remove main pollutants such as organic matters, inorganic matters, hydrogen sulfide, ammonia gas, mercaptan and the like, and respective stink, and the treatment efficiency can reach more than 90 percent at most; need not to add any material, only need set up corresponding waste gas main air hose and pressure boost centrifugal fan, make waste gas pass through the utility model discloses carry out the deodorization and decompose the purification, need not to add any material and participate in chemical reaction.
Description
Technical Field
The utility model belongs to the technical field of the mechanical technique and specifically relates to a naphthalene series water reducing agent workshop exhaust gas purification system is related to.
Background
The water reducing agent is a concrete admixture capable of reducing the water consumption for mixing under the condition of maintaining the slump constant of concrete basically. Most of them are anionic surfactants, such as lignosulfonate and naphthalene sulfonate formaldehyde polymer. After the concrete mixture is added, the dispersion effect on cement particles is achieved, the workability of the concrete mixture can be improved, the unit water consumption is reduced, and the fluidity of the concrete mixture is improved; or the unit cement consumption is reduced, and the cement is saved. The naphthalene water reducer can produce a large amount of naphthalene-containing waste gas in the production process, if the waste gas is not recycled, naphthalene in the waste gas can be wasted, and the malodorous air pollutants in the waste gas can directly enter the atmosphere to pollute the environment.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model aims to provide an efficient, adaptable strong, the low exhaust gas purification system of running cost's naphthalene series water-reducing agent workshop.
In order to achieve the above purpose, the utility model provides a scheme does: a naphthalene series water reducing agent workshop waste gas purification system comprises a naphthalene melting tank, a gas collecting hood, a recovery tank, a condensation recovery device, a spray recovery device, a pressurization centrifugal fan, a photochemical treatment device, a waste gas main air pipe and a chimney, wherein the gas collecting hood is arranged above the naphthalene melting tank to absorb steam generated by the naphthalene melting tank, the gas collecting hood, the condensation recovery device, the spray recovery device, the pressurization centrifugal fan, the photochemical treatment device and the chimney are sequentially arranged along the steam discharge direction, the gas collecting hood, the condensation recovery device, the spray recovery device, the pressurization centrifugal fan and the photochemical treatment device are all connected through the waste gas main air pipe, the condensation recovery device comprises a condensation tank body, a pressurization blower, a plurality of filter screens, a condensation pipe, a baffle plates and a water collecting tank, an air inlet pipe is arranged between the condensation tank body and the pressurization blower, and the condensation pipe and the plurality of filter screens are sequentially arranged in the air inlet pipe from inside to outside, the joint of the waste gas main air pipe and the condensation tank body is higher than the joint of the air inlet pipe and the condensation tank body, a plurality of baffles are arranged on the inner side wall of the condensation tank body in a staggered mode at equal intervals, the baffles are obliquely and downwards arranged, the bottom of the condensation tank body is provided with a water collecting tank for collecting condensed liquid naphthalene, and a return pipe is arranged between the water collecting tank and a recovery tank;
the spraying recovery device comprises a spraying tank body, a plurality of spray heads, a plurality of activated carbon layers and a water accumulation tank, wherein the spray heads, the activated carbon layers and the water accumulation tank are arranged in the spraying tank body;
the photochemical treatment device comprises a treatment chamber and a plurality of ultraviolet lamps, wherein the ultraviolet lamps are arranged in the treatment chamber, and the chimney is arranged on the top surface of the treatment chamber.
The utility model has the advantages that: the waste gas is efficiently treated, the photochemical treatment device is arranged in the utility model, so that the main pollutants such as organic matters, inorganic matters, hydrogen sulfide, ammonia gas, mercaptan and the like and the respective malodorous gas can be efficiently removed, and the treatment efficiency can reach more than 90 percent at most; the waste gas is deodorized, decomposed and purified by arranging the corresponding waste gas main air pipe and the pressurizing centrifugal fan without adding any substance, and the waste gas is not required to be added to participate in chemical reaction; the utility model has strong adaptability, can adapt to the purification treatment of low concentration, large gas volume and different gas substances, can continuously work 24 hours a day, and has stable and reliable operation; the utility model has the advantages of low operation cost, no mechanical action, no noise, no need of special management and daily maintenance, only need of periodic inspection, low energy consumption, extremely less than 900pa of wind resistance, and capability of saving a large amount of energy consumption for exhaust power; no pretreatment is needed, the waste gas does not need special pretreatment such as heating, humidifying and the like, the temperature of the working environment of the equipment is between 30 ℃ below zero and 50 ℃, the humidity is between 30% and 50%, and the PH value can normally work between 2 and 13; the occupied area is small, the dead weight is light, the method is suitable for special conditions such as compact arrangement and narrow site, and the occupied area of the equipment is less than 2 square meters per 10000m of processing for carrying out dry distillation/h of wind.
Further, a rain-proof cap is arranged at the top end of the chimney to prevent rainwater from entering the photochemical treatment device from the chimney.
Further, a feeding port is formed in the top face of the naphthalene melting tank.
Further, a monitoring platform is arranged on the outer side of the chimney, and a stair is arranged between the monitoring platform and the ground.
Furthermore, a monitoring sampling point is arranged on the side wall of the chimney, and the monitoring sampling point is higher than the monitoring platform.
Drawings
Fig. 1 is a structural diagram of the present invention.
Fig. 2 is the internal structure diagram of the condensation recycling device of the present invention.
Fig. 3 is the internal structure diagram of the spray recovery device of the utility model.
Wherein, 1 is a naphthalene melting tank, 11 is a feeding port, 21 is a gas collecting hood, 22 is a main waste gas duct, 23 is a recovery tank, 231 is a return pipe, 31 is a condensing tank body, 32 is a pressurizing blower, 33 is a filter screen, 34 is a condensing pipe, 35 is a baffle, 36 is a water collecting tank, 37 is an air inlet pipe, 41 is a spraying tank body, 42 is a spray head, 43 is an active carbon layer, 44 is a water accumulating tank, 5 is a pressurizing centrifugal blower, 61 is a treatment chamber, 62 is an ultraviolet lamp, 7 is a chimney, 71 is a rain-proof cap, 72 is a monitoring sampling point, 73 is a monitoring platform, and 74 is a stair.
Detailed Description
The invention will be further described with reference to the following specific embodiments:
referring to the attached drawings 1 to 3, the waste gas purification system for the naphthalene series water reducing agent production workshop comprises a naphthalene melting tank 1, a gas collecting hood 21, a recovery tank 23, a condensation recovery device, a spraying recovery device, a pressurizing centrifugal fan 5, a photochemical treatment device, a waste gas main air pipe 22 and a chimney 7, wherein the gas collecting hood 21 is arranged above the naphthalene melting tank 1 to absorb steam generated by the naphthalene melting tank 1, the gas collecting hood 21, the condensation recovery device, the spraying recovery device, the pressurizing centrifugal fan 5, the photochemical treatment device and the chimney 7 are sequentially arranged along the steam discharge direction, the gas collecting hood 21, the condensation recovery device, the spraying recovery device, the pressurizing centrifugal fan 5 and the photochemical treatment device are all connected through the waste gas main air pipe 22, the condensation recovery device comprises a condensation tank body 31, a pressurizing blower 32, a plurality of filter screens 33, a condensation pipe 34, a baffle 35 and a water collecting tank 36, an air inlet pipe 37 is arranged between the condensation tank body 31 and the pressurizing blower 32, the air inlet pipe 37 is internally and sequentially provided with a condensing pipe 34 and a plurality of filter screens 33 from inside to outside, the joint of the waste gas main air pipe 22 and the condensing tank 31 is higher than the joint of the air inlet pipe 37 and the condensing tank 31, a plurality of baffles 35 are arranged on the inner side wall of the condensing tank 31 at equal intervals in a staggered manner, the baffles 35 are arranged obliquely and downwards, the bottom of the condensing tank 31 is provided with a water collecting tank 36 for collecting condensed liquid naphthalene, and a return pipe 231 is arranged between the water collecting tank 36 and the recovery tank 23.
The spraying recovery device comprises a spraying tank body 41, a plurality of spray heads 42, a plurality of activated carbon layers 43 and a water accumulation groove 44, wherein the spray heads 42, the activated carbon layers 43 and the water accumulation groove 44 are arranged in the spraying tank body 41, the activated carbon layers 43 are sequentially arranged at equal intervals from top to bottom, the spray heads 42 are arranged on the activated carbon layers 43, and the water accumulation groove 44 is arranged at the bottom of the spraying tank body 41.
The photochemical treatment device comprises a treatment chamber 61 and a plurality of ultraviolet lamps 62, wherein the plurality of ultraviolet lamps 62 are arranged in the treatment chamber 61, and a chimney 7 is arranged on the top surface of the treatment chamber 61.
The top end of the chimney 7 is provided with a rain-proof cap to prevent rainwater from entering the photochemical treatment device from the chimney 7. The top surface of the naphthalene melting tank 1 is provided with a feeding port 11.
A monitoring platform 73 is arranged outside the chimney 7, and a stair 74 is arranged between the monitoring platform 73 and the ground. The side wall of the chimney 7 is provided with a monitoring sampling point 72, and the monitoring sampling point 72 is higher than a monitoring platform 73.
The exhaust gas purification process of the present embodiment is: starting a booster centrifugal fan 5 to enable a gas collecting hood 21 to absorb high-temperature waste naphthalene steam emitted by a naphthalene melting tank 1, enabling the waste naphthalene steam to enter a condensation recovery device through a waste gas main air pipe 22 for condensation recovery, wherein the condensation recovery process is specifically that the high-temperature waste naphthalene steam enters a condensation tank 31 from the side wall of the condensation tank 31, at the moment, a booster blower 32 is started, the booster blower 32 absorbs air and pumps the air into an air inlet pipe 37, the air is firstly filtered by a plurality of filter screens 33 in the air inlet pipe 37 to remove waste gas impurities in the air, then cold water and other condensation media are flowed through the condensation pipe 34 to cool the air, finally the cold air enters the condensation tank 31 from the air inlet pipe 37 to be mixed with the waste naphthalene steam, so that the waste naphthalene steam is cooled to form liquid naphthalene, and contacts a plurality of baffles 35 in the process of rising in the condensation tank 31 to enable the liquid naphthalene to be accumulated on the baffles 35 and flow downwards along the baffles 35, finally, the liquid naphthalene is collected in the water collecting tank 36 (the liquid naphthalene in the water collecting tank 36 has high purity and can be recycled), so that the liquid naphthalene flows back to the recovery tank 23 through the return pipe 231 for recycling, and 90% of naphthalene in the waste gas can be recovered in the condensation process; then the surplus useless naphthalene steam is discharged from the top of condensation jar body 31 and is sprayed the recovery through the main tuber pipe 22 of waste gas entering spray recovery unit, and the process of spraying specifically is, useless naphthalene steam is from spraying jar 41 lateral wall entering and spraying jar 41 in, a plurality of shower nozzle 42 blowout water smoke this moment, and water smoke and useless naphthalene steam contact form liquid naphthalene, and liquid naphthalene filters through a plurality of activated carbon layer 43, falls to in the ponding groove 44 at last and retrieves.
And finally, the residual waste gas containing main pollutants such as organic matters, inorganic matters, hydrogen sulfide, ammonia gas, mercaptan and the like enters a photochemical treatment device for photochemical treatment through a pressurizing centrifugal fan 5, and the specific process of the photochemical treatment is as follows: after the waste gas enters the treatment chamber 61, a plurality of ultraviolet lamps 62 are opened, under the action of the ultraviolet lamps 62, the ultraviolet rays decompose oxygen in the waste gas to generate ozone and ion oxygen, under the action of ultraviolet rays, ozone and photocatalyst, respective organic polymers and inorganic substances are oxidized and decomposed into tasteless and odorless gas in a short time, meanwhile, the strong oxidizing capacity of the ozone and the ozone are utilized to generate high-activity ion oxygen under the irradiation of the ultraviolet rays, malodorous substances can be converted into non-toxic simple inorganic substances such as carbon dioxide, water, sulfuric acid and nitric acid, the aim of purifying the waste gas is achieved, and finally the purified waste gas is discharged out of the atmosphere from a chimney.
The above-described embodiments are merely preferred embodiments of the present invention, which are not intended to limit the present invention in any way. Those skilled in the art can make further changes and modifications to the invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention. Therefore, the content of the technical scheme of the utility model, according to the equivalent change made by the idea of the utility model, should be covered in the protection scope of the utility model.
Claims (4)
1. The utility model provides a naphthalene series water-reducing agent workshop exhaust gas purification system which characterized in that: including melting naphthalene jar (1), gas collecting channel (21), recovery pond (23), condensation recovery unit, spray recovery unit, pressure boost centrifugal fan (5), photochemical processing device, waste gas main air pipe (22) and chimney (7), gas collecting channel (21) set up in melt naphthalene jar (1) top in order to absorb the steam that melts naphthalene jar (1) and produce, gas collecting channel (21), condensation recovery unit, spray recovery unit, pressure boost centrifugal fan (5), photochemical processing device and chimney (7) set gradually along the steam discharge direction, and all pass through between gas collecting channel (21), condensation recovery unit, spray recovery unit, pressure boost centrifugal fan (5) and the photochemical processing device waste gas main air pipe (22) are connected, condensation recovery unit includes the condensing tank body (31), pressure boost hair-dryer (32), a plurality of filter screens (33), A condensing pipe (34), a baffle (35) and a water collecting tank (36), an air inlet pipe (37) is arranged between the condensing tank body (31) and the supercharging blower (32), the air inlet pipe (37) is internally and sequentially provided with the condensing pipe (34) and a plurality of filter screens (33), the joint of the waste gas main air pipe (22) and the condensation tank body (31) is higher than the joint of the air inlet pipe (37) and the condensation tank body (31), a plurality of baffles (35) are arranged on the inner side wall of the condensation tank body (31) at equal intervals in a staggered manner, the baffles (35) are arranged obliquely downwards, the bottom of the condensing tank body (31) is provided with the water collecting tank (36) to collect the condensed liquid naphthalene, a return pipe (231) is arranged between the water collecting tank (36) and the recovery tank (23), and a feeding port (11) is arranged on the top surface of the naphthalene melting tank (1);
the spraying recovery device comprises a spraying tank body (41), and a plurality of spray heads (42), a plurality of activated carbon layers (43) and a water accumulating tank (44) which are arranged in the spraying tank body (41), wherein the activated carbon layers (43) are sequentially arranged at equal intervals from top to bottom, the spray heads (42) are arranged on the activated carbon layers (43), and the water accumulating tank (44) is arranged at the bottom of the spraying tank body (41);
the photochemical treatment device comprises a treatment chamber (61) and a plurality of ultraviolet lamps (62), wherein the ultraviolet lamps (62) are arranged in the treatment chamber (61), and the chimney (7) is arranged on the top surface of the treatment chamber (61).
2. The system of claim 1, wherein the system comprises: and a rain-proof cap is arranged at the top end of the chimney (7) to prevent rainwater from entering the photochemical treatment device from the chimney (7).
3. The system of claim 1, wherein the system comprises: the chimney monitoring device is characterized in that a monitoring platform (73) is arranged on the outer side of the chimney (7), and a stair (74) is arranged between the monitoring platform (73) and the ground.
4. The system of claim 3, wherein the system comprises: open on chimney (7) lateral wall and monitor sampling point (72), monitor sampling point (72) are higher than monitoring platform (73).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921521423.2U CN211069544U (en) | 2019-09-12 | 2019-09-12 | Naphthalene series water reducing agent workshop exhaust gas purification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921521423.2U CN211069544U (en) | 2019-09-12 | 2019-09-12 | Naphthalene series water reducing agent workshop exhaust gas purification system |
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| Publication Number | Publication Date |
|---|---|
| CN211069544U true CN211069544U (en) | 2020-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921521423.2U Active CN211069544U (en) | 2019-09-12 | 2019-09-12 | Naphthalene series water reducing agent workshop exhaust gas purification system |
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| Country | Link |
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| CN (1) | CN211069544U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120346625A (en) * | 2025-06-24 | 2025-07-22 | 连云港旺和新型建材有限公司 | Dust collecting equipment for mineral powder processing workshop |
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2019
- 2019-09-12 CN CN201921521423.2U patent/CN211069544U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120346625A (en) * | 2025-06-24 | 2025-07-22 | 连云港旺和新型建材有限公司 | Dust collecting equipment for mineral powder processing workshop |
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