CN203002153U - Multistage combined-type waste gas purification apparatus - Google Patents
Multistage combined-type waste gas purification apparatus Download PDFInfo
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- CN203002153U CN203002153U CN 201220478744 CN201220478744U CN203002153U CN 203002153 U CN203002153 U CN 203002153U CN 201220478744 CN201220478744 CN 201220478744 CN 201220478744 U CN201220478744 U CN 201220478744U CN 203002153 U CN203002153 U CN 203002153U
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Abstract
A multistage combined-type waste gas purification apparatus. Waste gas is introduced into a spraying device B by a waste gas suction device A, and is introduced into a cyclone material collecting device C; the waste gas and liquid intermiscible substances are transferred to a return pipe K and a liquid pool J by the cyclone material collecting device C; a gas pipeline C4 of the cyclone material collecting device C is connected with an induced draft fan D. Furthermore, an outlet of an air pipe of the induced draft fan D is connected with a water filtering device G; the separated liquid is introduced into the return pipe K by the water filtering device G; the return pipe K is communicated with the liquid pool J. the outlet of the air pipe of the induced draft fan D is connected with a cyclone material collecting device F; the waste gas and liquid intermiscible substances are transferred to the return pipe K and the liquid pool J by the cyclone material collecting device F; a gas pipeline F4 of the cyclone material collecting device F is connected with the water filtering device G; the separated liquid is introduced into the return pipe K and the liquid pool J by the water filtering device G. The water filtering device G is the other end of a double-layer hollow U-shaped pipe, and is connected with an active carbon purification device. The utility model has the beneficial effects that various industrial waste gas can be treated; combined-type design is adopted, which is flexible for use; the waste gas treatment efficiency is high, and the purification effect is good.
Description
Technical field
The utility model relates to cleaner production and environmental protection technical field, is further gas purifying equipment, especially for the waste gas that produces in various industrial processes, such as the gas purifying equipment that contains dust waste gas, acid waste gas, oil flue waste gas etc.
Background technology
Along with the increasing of people to the environmental protection dynamics, life and the processing of industrial waste gas are paid attention to by society day by day.Especially the dust waste gas that produces, acid waste gas, oil flue waste gas etc., as process badly, can cause larger pollution to environment.Yet in prior art, the off-gas cleaning equipment designing technique is relatively single, processes the waste gas effect and has much room for improvement.
Therefore, research and solve the equipment that can purify various waste gas, dust and mist, very valuable.
The utility model content
The purpose of this utility model is to provide a kind of multistage combined off-gas cleaning equipment, and it adopts the combined type design, can process efficiently various waste gas.
The purpose of this utility model realizes by following scheme:
Multistage combined off-gas cleaning equipment comprises the waste gas suction apparatus A that connects successively, spray equipment B, and tornado feeder set C, waste gas suction apparatus A imports spray equipment B with waste gas, and spray equipment B is used for waste gas and liquid are mixed, and forms the misty rain shape; Tornado feeder set C is used for the waste gas that enters tornado feeder set C and the liquid thing that dissolves each other is collected, and changes return duct K over to; It is characterized in that: the structure of described spray equipment B is: in be provided with some shower B2, each shower has a plurality of fluid holes, fluid hole can be decided pore diameter size according to the pressure size of concentration, air intake blast and the water of liquid, be provided with the first valve B1 on the top of shower B2, can regulate pressure and the flow of liquid; The structure of described tornado feeder set C is: tornado feeder set C is funnel-form, and its lower end the second valve C2 regularly discharges impurities in collection Litter in tornado feeder set C; The bottom of tornado feeder set C also is provided with discharging tube C3, discharging tube C3 is S shape or the U-shaped that is bent upwards, to be detained liquid, gas can not be sprayed from the lower end, discharging tube C3 outer end is provided with the 3rd valve C5, the 3rd valve C5 flow rate adjustable and liquid level, the 3rd valve C5 is connected to return duct K, and return duct K leads to liquid pool J; Described liquid pool J connects spray piping by pipeline, and spray piping connects shower B2 by the first valve B1; Be provided with feed channel C4 in tornado feeder set C, feed channel C4 end opening is placed in middle part or the middle and upper part of tornado feeder set C, and feed channel C4 connects air-introduced machine D.
The utility model also can further be realized by following scheme:
The outlet of described air-introduced machine D airduct connects water treatment plant G, the structure of described water treatment plant G is: water treatment plant G is double layer hollow type U-shaped tubular construction, be provided with a plurality of taper captation G1 in inner tube, taper captation G1 cone point makes progress, and upper lower wall is cellular or netted; Be stainless steel wire or other corrosion-resistant fluffy filiforms in interlayer between upper lower wall, there are a lot of spillway holes interlayer lower end and water treatment plant inwall junction, make the moisture of gathering enter the lower end of outer tube by this orifice flow; Water treatment plant G lower end arranges the 7th valve G4, regularly impurities in collection Litter in water treatment plant is discharged; Water treatment plant G bottom also is provided with discharging tube G5, discharging tube G5 is S shape or the U-shaped that is bent upwards, to be detained liquid, gas can not be sprayed from the lower end, discharging tube G5 outer end is provided with the 8th valve G6, the 8th valve G6 flow rate adjustable and liquid level, the 8th valve G6 is connected to return duct K, and return duct K leads to liquid pool J.
Further:
The outlet of described air-introduced machine D airduct connects tornado feeder set F, and the structure of tornado feeder set F is: tornado feeder set F is funnel-form, and its lower end the 5th valve F2 regularly discharges impurities in collection Litter in tornado feeder set F; The bottom of tornado feeder set F also is provided with discharging tube F3, discharging tube F3 is S shape or the U-shaped that is bent upwards, to be detained liquid, gas can not be sprayed from the lower end, discharging tube F3 outer end is provided with the 6th valve F5, the 6th valve F5 flow rate adjustable and liquid level, the 6th valve F5 is connected to return duct K, and return duct K leads to liquid pool J; Tornado feeder set F is built-in with feed channel F4, feed channel F4 end opening is placed in middle part or the middle and upper part of tornado feeder set F, feed channel F4 connects water treatment plant G, the structure of described water treatment plant G is: water treatment plant G is double layer hollow type U-shaped tubular construction, be provided with a plurality of taper captation G1 in inner tube, taper captation G1 cone point makes progress, and upper lower wall is cellular or netted; Be stainless steel wire or other corrosion-resistant fluffy filiforms in interlayer between upper lower wall, there are a lot of spillway holes interlayer lower end and water treatment plant inwall junction, make the moisture of gathering enter the lower end of outer tube by this orifice flow; Water treatment plant G lower end arranges the 7th valve G4, regularly impurities in collection Litter in water treatment plant is discharged; Water treatment plant G bottom also is provided with discharging tube G5, discharging tube G5 is S shape or the U-shaped that is bent upwards, to be detained liquid, gas can not be sprayed from the lower end, discharging tube G5 outer end is provided with the 8th valve G6, the 8th valve G6 flow rate adjustable and liquid level, the 8th valve G6 is connected to return duct K, and return duct K leads to liquid pool J.
Further again:
Described water treatment plant G is the other end of double layer hollow type U-shaped pipe, also be connected with the activated carbon purifier, be provided with multilayer active carbon filtration layer H2 in described activated carbon purifier, this activated carbon purifier lower floor arranges minute device of air of porous shape, be provided with a plurality of activated carbon filter layers in device, activated carbon filter layer is packed into from a side of purifier wall, can increase at any time, reduces or change active carbon layer.
The exit of described air-introduced machine D airduct is provided with spray equipment E, the structure of described spray equipment E is: in be provided with some shower E2, each shower has a plurality of fluid holes, fluid hole can be decided pore diameter size according to the pressure size of concentration, air intake blast and the water of liquid, be provided with the 4th valve E1 on the top of shower E2, can regulate pressure and the flow of liquid; Spray piping connects shower E2 by the 4th valve E1, and spray piping is communicated with liquid pool J.
Described the first tornado feeder set C, the second tornado feeder set F and water treatment plant G combine, and make equipment form triangular shape, and this can make equipment volume greatly reduce, and is conducive to install and use.
Described the first tornado feeder set C, the second tornado feeder set F and water treatment plant G lower end are respectively arranged with the first observation panel C1, the second observation panel F1, the 3rd observation panel G3, are used for the liquid levels of lower end is observed.
The structure of described waste gas suction apparatus A is: the waste gas suction inlet is horn-like, is conducive to suction and the collection of waste gas, and top is movable curved neck, malleable air intake angle and direction.
The beneficial effects of the utility model are: 1, process range is wide, for the waste gas that produces in various industrial processes, such as containing dust waste gas, acid waste gas, oil flue waste gas etc., both can purify pure gas, can purify mist again; 2, combined type design can be used flexibly, adopts multistage combined design, can for different situations, select the equipment of various combination; 3, processing waste gas efficient is high, good purification: the settings such as spray thrower, cleaning material shower nozzle, puff prot can strengthen cleaning performance; And the cleaning fluid reusable edible, waste gas is by processing qualified discharge.
In order to make those skilled in the art person understand better the utility model scheme, and above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with embodiment, the utility model is described in further detail.
Description of drawings
Fig. 1 is the utility model schematic diagram.
The specific embodiment
Embodiment:
As shown in Figure 1,
A is the waste gas suction inlet of waste gas suction apparatus, for horn-like, is conducive to suction and the collection of waste gas, and top is movable curved neck, malleable air intake angle and direction.
B is the one-level spray equipment, and this device is for square, in shower is arranged.B1 is the first valve, can regulate pressure and the flow of liquid; B2 is shower, this shower can be a plurality of as requested, there are a plurality of fluid holes in each shower lee side, fluid hole can be decided pore diameter size according to the pressure size of concentration, air intake blast and the water of liquid, this fluid hole goes out back to air intake, and the aperture is difficult for excessive, and the hole mostly is, be conducive to waste gas and liquid fully absorbs, form the misty rain shape.
C is the one-level tornado feeder set.Collect entering waste gas in tornado feeder set and the liquid thing that dissolves each other.C1 is tornado feeder set lower end observation panel, and the liquid levels of tornado feeder set lower end is observed; C2 is that the second valve is placed in the tornado feeder set lower end, regularly discharges collecting in Litter impurities in tornado feeder set, and this valve can with magnetic valve or pneumatic operated valve, regularly be discharged foreign material automatically; C3 is S shape or U-shaped discharging tube, this device is arranged at the second somewhere, valve C2 top, tornado feeder set lower end, pipe crook highest point will be lower than the center of observation panel C1, this device can make the tornado feeder set lower end possess liquid always, gas can not be entered from the lower end, and adjust flow and liquid level by this device lower end C5 the 3rd valve, the anti-return duct K that flow to of liquid after absorption waste gas, again to the J liquid pool, C4 is one-level tornado feeder set outlet pipe, and the gas after first class purification is discharged by this road.
D is air-introduced machine, be corrosion-resistant formula blower fan, blower fan is in the middle of Liang Jikou, the one-level tornado feeder set is collected the particle in waste gas or dust thing, gleanings is deposited on the bottom of tornado feeder set C in tornado feeder set, the second valve C2 discharges from the bottom, thereby reduces the wearing and tearing of fan blade, extends service life of fan.Blower fan also makes that blast is negative pressure in the one-level tornado feeder set, is malleation in the secondary tornado feeder set.
E is secondary spray equipment (this device similar to B spray equipment), in shower is arranged.E1 is the 4th valve, can regulate pressure and flow that liquid enters; E2 is shower, this shower can be a plurality of as requested, there are a plurality of fluid holes in each shower lee side, fluid hole can be according to the pressure size of concentration, air intake blast and the water of liquid and set aperture is big or small, this portals and goes out back to air intake, portalling, it is excessive to be difficult for, and makes secondary exhaust gas and liquid carry out fully merging absorbing, and again forms the misty rain shape.This spray equipment is less than the liquid of B spray equipment ejection, contains more moisture in the air after avoiding purifying, and the activated carbon in H is extended service life.
F is the secondary tornado feeder set.Collect entering waste gas in tornado feeder set and the liquid thing that dissolves each other.F1 is tornado feeder set lower end observation panel, and the liquid levels of tornado feeder set lower end is observed; F2 is that the 5th valve is placed in the tornado feeder set lower end, regularly discharges collecting in Litter impurities in tornado feeder set, and this valve can with magnetic valve or pneumatic operated valve, regularly be discharged foreign material automatically; F3 is S shape or U-shaped discharging tube, this device is arranged at the 5th somewhere, valve F2 top, tornado feeder set lower end, managing curved highest point will be lower than the center of observation panel F1, this device can make the tornado feeder set lower end possess liquid always, gas can not be discharged from the lower end, and adjust flow and liquid level by this device lower end the 6th valve F5, the anti-return duct K that flow to of liquid after absorption waste gas, again to the J liquid pool, F4 is secondary tornado feeder set feed channel, and the gas after secondary purification is discharged by this road.
G is water treatment plant, and contained moisture content in gas after purifying is assembled again, is conducive to that in H, activated carbon extends service life, and this device is U-shaped, and device is the double layer hollow type, in be provided with a plurality of taper captation G1 and G2.G1 and G2 cone point upwards, are stainless steel wire or other corrosion-resistant fluffy filiforms in the middle of each captation interlayer, and on the captation bullet, lower wall is cellular or netted.There are a lot of spillway holes G1 and G2 lower end and water treatment plant inwall junction, and the moisture content that makes gathering enters the water treatment plant lower end by this orifice flow.G3 is the water treatment plant observation panel.G4 is that the 7th valve is placed in the water treatment plant lower end, regularly discharges collecting in Litter impurities in water treatment plant, and this valve can or be pneumatic operated valve with magnetic valve, automatically regular discharge foreign material.G5 is water treatment plant S shape or U-shaped discharging tube, this device is arranged at the 7th somewhere, valve G4 top, water treatment plant lower end, managing curved highest point will be lower than the center of observation panel G3, this device can make the water treatment plant lower end possess liquid always, gas can not be sprayed from the lower end, and adjust flow and liquid level by this device lower end the 8th valve G6, the anti-return duct K that flow to of liquid after absorption waste gas, again to the J liquid pool.
H is three level active carbon purifiers, this device circular or square all can, in be provided with multilayer active carbon filtration layer, this purifier bottom H1 is a minute device of air, this device is the porous shape, and the gas of ejection is disperseed.H2 is the active carbon filtration layer, packs in a side of purifier wall, can change at any time active carbon layer.H3 is monitoring instrument (adopting different monitoring instruments for different waste gas), and the gas that purifies rear discharge is carried out data monitoring, and whether gas-monitoring is up to standard.Situation up to standard according to gas, judgment device select to open first class purification, secondary purification, three grades of purifications etc.
K is return duct, and the liquid backflow after each is collected is to water liquid pool J.
J water liquid pool, the liquid after each is collected stores, the supply water pump, this pond liquid can be configured industrial chemicals according to different pollutants contained in Litter, and the liquid of configuration is conducive to absorb the pollutant in waste gas.This liquid periodic replacement is processed the mutually soluble liquids that absorbs exhaust emission again, is as the criterion with qualified discharge.
The L water pump is the firsts and seconds clarifier supply aqueous solution (can be water, also can be that alkaline solution or acid solution or other are conducive to the liquid that in absorbed air, pollutant is as the criterion).
According to exhaust gas constituents, can only use the C combination, also can use C, G combination, can also use C, F and G combination.Above C, F and G can combine, and make equipment form triangular shape, and this can make equipment volume greatly reduce, and is conducive to install and use.If on the G device, exhaust outlet has demand can separately add rain cover.
Each equipment material of handy acid-alkali-corrosive-resisting is made (plastics, stainless steel etc.).
The above; it is only the specific embodiment of the present utility model; but protection domain of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement are within all should being encompassed in protection domain of the present utility model.
Claims (8)
1. multistage combined off-gas cleaning equipment, comprise the waste gas suction apparatus (A) that connects successively, spray equipment (B), tornado feeder set (C), waste gas suction apparatus (A) imports spray equipment (B) with waste gas, and spray equipment (B) is used for waste gas and liquid are mixed, and forms the misty rain shape; Tornado feeder set (C) is used for the waste gas that enters tornado feeder set (C) and the liquid thing that dissolves each other is collected, and changes return duct (K) over to; It is characterized in that: the structure of described spray equipment (B) is: in be provided with some showers (B2), each shower has a plurality of fluid holes, fluid hole can be decided pore diameter size according to the pressure size of concentration, air intake blast and the water of liquid, be provided with the first valve (B1) on the top of shower (B2), can regulate pressure and the flow of liquid; The structure of described tornado feeder set (C) is: tornado feeder set (C) is funnel-form, and its lower end second valve (C2) is regularly discharged impurities in collection Litter in tornado feeder set (C); The bottom of tornado feeder set (C) also is provided with discharging tube (C3), discharging tube (C3) is S shape or the U-shaped that is bent upwards, to be detained liquid, gas can not be sprayed from the lower end, discharging tube (C3) outer end is provided with the 3rd valve (C5), the 3rd valve (C5) flow rate adjustable and liquid level, the 3rd valve (C5) is connected to return duct (K), and return duct (K) leads to liquid pool (J); Described liquid pool (J) connects spray piping by pipeline, and spray piping connects shower (B2) by the first valve (B1); Be provided with feed channel (C4) in tornado feeder set (C), feed channel (C4) end opening is placed in middle part or the middle and upper part of tornado feeder set (C), and feed channel (C4) connects air-introduced machine (D).
2. multistage combined off-gas cleaning equipment according to claim 1, it is characterized in that: the outlet of described air-introduced machine (D) airduct connects water treatment plant (G), the structure of described water treatment plant (G) is: water treatment plant (G) is double layer hollow type U-shaped tubular construction, be provided with a plurality of taper captations (G1) in inner tube, taper captation (G1) cone point makes progress, and upper lower wall is cellular or netted; Be stainless steel wire or other corrosion-resistant fluffy filiforms in interlayer between upper lower wall, there are a lot of spillway holes interlayer lower end and water treatment plant inwall junction, make the moisture of gathering enter the lower end of outer tube by this orifice flow; Water treatment plant (G) lower end arranges the 7th valve (G4), regularly impurities in collection Litter in water treatment plant is discharged; Water treatment plant (G) bottom also is provided with discharging tube (G5), discharging tube (G5) is S shape or the U-shaped that is bent upwards, to be detained liquid, gas can not be sprayed from the lower end, discharging tube (G5) outer end is provided with the 8th valve (G6), the 8th valve (G6) flow rate adjustable and liquid level, the 8th valve (G6) is connected to return duct (K), and return duct (K) leads to liquid pool (J).
3. multistage combined off-gas cleaning equipment according to claim 1, it is characterized in that: the outlet of described air-introduced machine (D) airduct connects tornado feeder set (F), the structure of tornado feeder set (F) is: tornado feeder set (F) is funnel-form, its lower end the 5th valve (F2) is regularly discharged impurities in collection Litter in tornado feeder set (F); The bottom of tornado feeder set (F) also is provided with discharging tube (F3), discharging tube (F3) is S shape or the U-shaped that is bent upwards, to be detained liquid, gas can not be sprayed from the lower end, discharging tube (F3) outer end is provided with the 6th valve (F5), the 6th valve (F5) flow rate adjustable and liquid level, the 6th valve (F5) is connected to return duct (K), and return duct (K) leads to liquid pool (J); Tornado feeder set (F) is built-in with feed channel (F4), feed channel (F4) end opening is placed in middle part or the middle and upper part of tornado feeder set (F), feed channel (F4) connects water treatment plant (G), the structure of described water treatment plant (G) is: water treatment plant (G) is double layer hollow type U-shaped tubular construction, be provided with a plurality of taper captations (G1) in inner tube, taper captation (G1) cone point makes progress, and upper lower wall is cellular or netted; Be stainless steel wire or other corrosion-resistant fluffy filiforms in interlayer between upper lower wall, there are a lot of spillway holes interlayer lower end and water treatment plant inwall junction, make the moisture of gathering enter the lower end of outer tube by this orifice flow; Water treatment plant (G) lower end arranges the 7th valve (G4), regularly impurities in collection Litter in water treatment plant is discharged; Water treatment plant (G) bottom also is provided with discharging tube (G5), discharging tube (G5) is S shape or the U-shaped that is bent upwards, to be detained liquid, gas can not be sprayed from the lower end, discharging tube (G5) outer end is provided with the 8th valve (G6), the 8th valve (G6) flow rate adjustable and liquid level, the 8th valve (G6) is connected to return duct (K), and return duct (K) leads to liquid pool (J).
4. according to claim 2 or 3 described multistage combined off-gas cleaning equipments, it is characterized in that: described water treatment plant (G) is the other end of double layer hollow type U-shaped pipe, also be connected with the activated carbon purifier, be provided with multilayer active carbon filtration layer (H2) in described activated carbon purifier, this activated carbon purifier lower floor arranges minute device of air of porous shape, be provided with a plurality of activated carbon filter layers in device, activated carbon filter layer is packed into from a side of purifier wall, can increase at any time, reduces or change active carbon layer.
5. according to claim 2 or 3 described multistage combined off-gas cleaning equipments, it is characterized in that: the exit of described air-introduced machine (D) airduct is provided with spray equipment (E), the structure of described spray equipment (E) is: in be provided with some showers (E2), each shower has a plurality of fluid holes, fluid hole can be decided pore diameter size according to the pressure size of concentration, air intake blast and the water of liquid, be provided with the 4th valve (E1) on the top of shower (E2), can regulate pressure and the flow of liquid; Spray piping connects shower (E2) by the 4th valve (E1), and spray piping is communicated with liquid pool (J).
6. multistage combined off-gas cleaning equipment according to claim 3, it is characterized in that: described the first tornado feeder set (C), the second tornado feeder set (F) and water treatment plant (G) are combined, make equipment form triangular shape, this can make equipment volume greatly reduce, and is conducive to install and use.
7. multistage combined off-gas cleaning equipment according to claim 3, it is characterized in that: described the first tornado feeder set (C), the second tornado feeder set (F) and water treatment plant (G) lower end are respectively arranged with the first observation panel (C1), the second observation panel (F1), the 3rd observation panel (G3), are used for the liquid levels of lower end is observed.
8. multistage combined off-gas cleaning equipment according to claim 1, it is characterized in that: the structure of described waste gas suction apparatus (A) is: the waste gas suction inlet is horn-like, be conducive to suction and the collection of waste gas, top is movable curved neck, malleable air intake angle and direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220478744 CN203002153U (en) | 2012-09-19 | 2012-09-19 | Multistage combined-type waste gas purification apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220478744 CN203002153U (en) | 2012-09-19 | 2012-09-19 | Multistage combined-type waste gas purification apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN203002153U true CN203002153U (en) | 2013-06-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220478744 Expired - Lifetime CN203002153U (en) | 2012-09-19 | 2012-09-19 | Multistage combined-type waste gas purification apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN203002153U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814098A (en) * | 2012-09-19 | 2012-12-12 | 巨锋 | Multilevel combined waste gas purifying equipment |
| CN106731452A (en) * | 2016-12-20 | 2017-05-31 | 南通春光自控设备工程有限公司 | Spraying emission-control equipment |
-
2012
- 2012-09-19 CN CN 201220478744 patent/CN203002153U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814098A (en) * | 2012-09-19 | 2012-12-12 | 巨锋 | Multilevel combined waste gas purifying equipment |
| CN102814098B (en) * | 2012-09-19 | 2015-01-28 | 巨锋 | Multilevel combined waste gas purifying equipment |
| CN106731452A (en) * | 2016-12-20 | 2017-05-31 | 南通春光自控设备工程有限公司 | Spraying emission-control equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130619 Effective date of abandoning: 20150128 |
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| RGAV | Abandon patent right to avoid regrant |