CN112112712A - Steam purifier for engine tail gas - Google Patents
Steam purifier for engine tail gas Download PDFInfo
- Publication number
- CN112112712A CN112112712A CN201910563977.7A CN201910563977A CN112112712A CN 112112712 A CN112112712 A CN 112112712A CN 201910563977 A CN201910563977 A CN 201910563977A CN 112112712 A CN112112712 A CN 112112712A
- Authority
- CN
- China
- Prior art keywords
- gas
- water
- chopper
- air
- engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007789 gas Substances 0.000 claims abstract description 133
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000004062 sedimentation Methods 0.000 claims abstract description 19
- 239000002245 particle Substances 0.000 claims abstract description 15
- 239000003595 mist Substances 0.000 claims description 12
- 239000013618 particulate matter Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000009835 boiling Methods 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 230000008016 vaporization Effects 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 1
- 238000009834 vaporization Methods 0.000 claims 1
- 238000000746 purification Methods 0.000 abstract description 8
- 238000001816 cooling Methods 0.000 abstract description 7
- 238000004887 air purification Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002912 waste gas Substances 0.000 abstract 4
- 239000003054 catalyst Substances 0.000 abstract 2
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separation Of Particles Using Liquids (AREA)
Abstract
The invention belongs to the field of air purification, and particularly relates to a steam purifier for engine tail gas, which is suitable for tail gas purification of engines of vehicles and ships. At present, the air purification of the engines of vehicles and ships mainly uses the three-way catalyst for purification, but the three-way catalyst purifier has the defects of high manufacturing cost, incomplete purification and easy blockage, the invention introduces the waste gas discharged by the engine into a gas mixing chamber which is simultaneously communicated with a hot steam fog generator, after the waste gas discharged by the engine is mixed with the hot steam fog, solid particles in the waste gas lose the floating capacity and enter a cooling sedimentation tank, water exists in the cooling sedimentation tank, the gas in the cooling sedimentation tank is cooled, the air particles such as PM2.5 particles and the like in the waste gas are precipitated in the water, and the residual clean gas overflows from the cooling sedimentation tank. The scheme is high in purification efficiency, little in pollution discharge and close to zero pollution, and can thoroughly purify air to reach the standard of human breathing air and close to zero emission.
Description
Field of the invention
The invention belongs to the field of gas purification, and particularly relates to steam type purification of engine tail gas
The device is suitable for purifying the tail gas of the engines of vehicles and ships.
Background
At present, the air purification of the engines of vehicles and ships mainly uses a ternary purifier, but the ternary purifier has the defects of high manufacturing cost, incomplete purification and easy blockage, so that the development of a purifier for completely purifying the tail gas of the engine is very necessary.
Disclosure of Invention
The utility model provides an engine exhaust steam purifier, a steam purifier concatenates on engine exhaust's pollution gas passageway, this steam purifier has the gas mixing chamber, the gas mixing chamber communicates hot steam water generator simultaneously, gaseous pollutant becomes the gas of moist state after mixing with steam water smoke, the gas of moist state reentrants cooling sedimentation tank, there is water in the cooling sedimentation tank, gas is cooled down, its particulate matter also loses the floating capacity, wherein air particle such as PM2.5 granule is depositd in the aquatic, surplus clean gas overflows from the cooling sedimentation tank. This scheme of adoption, simple structure, with low costs, purification efficiency is high, and the blowdown is minimum, approaches zero pollution.
The specific technical scheme adopted by the invention is that the polluted gas discharged by an engine enters a gas mixing chamber through an air pipeline, the gas mixing chamber is a closed space and is simultaneously communicated with a hot steam generator, the hot steam generator is formed by water and a heat source in a closed container, the water is heated to boiling and vaporizing by the heat source, the water is fully atomized to form steam mist, the gas mixing chamber is communicated with a particle settling tank through a gas mixing pipe, the particle settling tank is filled with the water, an air exhaust fan is connected on the gas mixing pipe in series, the gas outlet end of the gas mixing pipe is communicated with a gas chopper, the gas chopper is a ventilated cavity, the ventilated surface of the gas chopper is a porous filter screen, the gas chopper is arranged below the water surface in the particle settling tank, and the upper end of the particle settling tank is provided with an air outlet; polluted gas discharged by an engine is introduced by an air exhaust fan and enters a gas mixing chamber through an air pipeline, steam water mist also enters the gas mixing chamber, the polluted gas and the steam water mist are mixed in the gas mixing chamber to become humid gas, the humid gas enters a particulate matter sedimentation tank through the air exhaust fan, water is arranged in the particulate matter sedimentation tank, the outlet end of a gas mixing pipe is communicated with a gas chopper, the gas chopper is soaked in the water, the humid gas can only enter the water through fine meshes of the gas chopper, the humid gas is forcibly cut into fine micro bubbles by the gas chopper, the micro bubbles are cooled and precipitate polluted particles in the air in the water, and the rest part becomes clean gas and is discharged from an exhaust pipe of the engine; all the components except the air inlet and the air outlet are sealed in the purifier shell; the heat source comprises one or a combination of resistance heating elements for heating by electrifying and engine waste heat utilization heating.
Drawings
FIG. 1 is a schematic diagram of a steam-water mist type air purifier with a mesh-shaped chamber as a gas chopper.
Fig. 2 is a schematic diagram of the principle of steam water mist type air purification consisting of a tubular cavity and a filter screen arranged in the tubular cavity of the gas chopper.
Fig. 3 is a schematic diagram of a gas chopper consisting of a mesh chamber.
FIG. 4 is a schematic view of the principle of the gas chopper with the tubular cavity and the screen arranged therein.
Fig. 5 is a schematic plan view of a screen.
In the figure, 1, polluted gas, 2, an air pipeline, 3, a gas mixing chamber, 4, a hot steam water generator, 5, a gas mixing pipe, 6, a particle settling tank, 7, an air exhaust fan, 8, a gas chopper, 9, a water surface, 10, an exhaust pipe, 11, clean gas, 12, wet gas, 13, steam water mist, 14, a purifier shell, 15, a tubular cavity, 16, a filter screen, 17, a mesh chamber, 18, micro bubbles and 19, a heat source.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
In the figure, the gas chopper 8 is composed of a closed and permeable chamber, called a mesh chamber 17, formed by a screen 16, and a plurality of mesh chambers 17 of different sizes are coaxially and parallelly sleeved to form the gas chopper 8, and the layers of the screen are separated by a certain distance.
The gas chopper 8 is composed of a tubular cavity 15 and filter screens 16 arranged in the tubular cavity, the plane of each filter screen 16 is vertical to the axial direction of the tubular cavity 15, the periphery of the plane of each filter screen 16 is matched with the inner wall of the tubular cavity 15, the filter screens 16 are parallel and spaced at a certain distance, and the wet gas 12 can only pass through small holes of the filter screens 16, so that the wet gas 12 is forcibly cut into tiny bubbles 18.
Fig. 1 is a schematic view of the principle of air purification with a mesh chamber as the gas chopper. In fig. 1, a polluted gas 1 enters a gas mixing chamber 3 through an air pipeline 2, the gas mixing chamber 3 is a closed space, the gas mixing chamber 3 is simultaneously communicated with a hot steam water generator 4, the hot steam water generator 4 is formed by adding water and a heat source (19) in a closed container, the heat source 19 heats the water to boil and vaporize, the water is fully atomized to form steam water mist 13, the gas mixing chamber 3 is communicated into a particulate matter sedimentation tank 6 through a gas mixing pipe 5, the particulate matter sedimentation tank 6 contains water, an air exhaust fan 7 is connected to the gas mixing pipe 5 in series, the gas outlet end of the gas mixing pipe 5 is communicated with a gas chopper 8, the gas chopper 8 is a breathable chamber, the breathable surface of the gas chopper is a porous filter screen, the gas chopper 8 is arranged below the water surface 9 in the particulate matter sedimentation tank 6, and the upper end of the particulate matter sedimentation tank 8; the method comprises the following steps that polluted gas 1 is introduced by an air exhaust fan 7 and enters a gas mixing chamber 3 through an air pipeline 2, steam mist 13 also enters the gas mixing chamber 3, the polluted gas 1 and the steam mist 13 are mixed in the gas mixing chamber 3 to become wet gas 12, the wet gas 12 enters a particulate matter sedimentation tank 6 through the air exhaust fan 7, water is contained in the particulate matter sedimentation tank 6, the outlet end of a gas mixing pipe 5 is communicated with a gas chopper 8, the gas chopper 8 is soaked in water, the wet gas 12 can only enter the water through fine meshes of the gas chopper 8, the wet gas 12 is forcibly cut into fine bubbles 18 by the gas chopper 8, the fine bubbles 18 are cooled and polluted particles in the air are precipitated in the water, the rest part of the air is clean gas 11, and the clean gas 11 is conveyed to an engine air inlet pipe through an air outlet pipe 10; all of the above components except the air inlet and the air outlet are enclosed in the purifier housing 14; the heat source comprises one or a combination of resistance heating elements for heating by electrifying and engine waste heat utilization heating.
Fig. 2 is a schematic view of the principle of air purification consisting of a tubular cavity and a filter screen arranged in the tubular cavity. Fig. 2 is basically the same principle as fig. 1, except that in fig. 2, the gas chopper 8 is composed of a tubular cavity 15 and a filter screen 16 arranged in the tubular cavity 15, the plane of the filter screen 16 is vertical to the axial direction of the tubular cavity 15, the periphery of the plane of the filter screen 16 is matched with the inner wall of the tubular cavity 15, the filter screens 16 are parallel and spaced apart, the wet gas 12 can only pass through the small holes of the filter screen 16 and enter the water, and therefore the wet gas 12 is forcedly cut into tiny bubbles 18.
Fig. 3 is a schematic diagram of a gas chopper consisting of a mesh chamber. In fig. 3, the mesh chamber 17 is a gas-permeable closed cavity, and a plurality of mesh chambers 17 of different sizes are coaxially and parallelly sleeved to form the gas chopper 8, and a certain distance is reserved between the filter screen layers.
FIG. 4 is a schematic view of the principle of the gas chopper with the tubular cavity and the screen arranged therein. In fig. 4, the gas chopper 8 is composed of a tubular cavity 15 and a filter screen 16 arranged therein, the plane of the filter screen 16 is axially perpendicular to the tubular cavity 15, the periphery of the plane of the filter screen 16 is matched with the inner wall of the tubular cavity 15, and the filter screens 16 are parallel and spaced at a certain distance.
Fig. 5 is a schematic plan view of a screen. The screen 16 is a mesh-like planar body that includes a sponge, an air-permeable sand hammer, and various variants of porous screens.
The installation position of the steam purifier for the tail gas of the engine has three forms: the first is installed between the engine and the ternary purifier, the second is installed behind the ternary purifier, and the third is to directly replace the ternary purifier, namely, the ternary purifier is omitted and the engine tail gas steam purifier is directly installed.
It should be noted that the steam is generated by heating the water in the container to boiling, which belongs to the known technology, and the structure of the hot steam water generator 4 will not be described in detail.
Claims (3)
1. The engine tail gas steam purifier is characterized in that a polluted gas (1) discharged from an engine enters a gas mixing chamber (3) through an air pipeline (2), the gas mixing chamber (3) is a closed space, the gas mixing chamber (3) is simultaneously communicated with a hot steam generator (4), the hot steam generator (4) is formed by water in a closed container and a heat source (19), the heat source (19) heats the water to boiling and vaporization, the water is fully atomized to form steam water mist (13), the gas mixing chamber (3) is communicated into a particulate matter sedimentation tank (6) through a gas mixing pipe (5), the particulate matter sedimentation tank (6) is filled with the water, an air exhaust fan (7) is connected to the gas mixing pipe (5) in series, the air outlet end of the gas mixing pipe (5) is communicated with a gas chopper (8), the gas chopper (8) is a breathable chamber, the breathable surface of the gas chopper (8) is a porous filter screen, and the gas chopper (8) is arranged below the water surface (9) in the particulate matter sedimentation tank, the upper end of the particle sedimentation tank (8) is provided with an air outlet pipe (10); the method comprises the steps that polluted gas (1) exhausted from an engine is introduced by an air exhaust fan (7) and enters a gas mixing chamber (3) through an air pipeline (2), steam water mist (13) also enters the gas mixing chamber (3), the polluted gas (1) exhausted from the engine and the steam water mist (13) are mixed in the gas mixing chamber (3) to form humid gas (12), the humid gas (12) enters a particle settling tank (6) through the air exhaust fan (7), water exists in the particle settling tank (6), the outlet end of a gas mixing pipe (5) is communicated with a gas chopper (8), the gas chopper (8) is soaked in the water, the humid gas (12) can only enter the water through fine meshes of the gas chopper (8), the humid gas (12) is forcibly cut into fine-crushed micro bubbles (18) by the gas chopper (8), the micro bubbles (18) are cooled and polluted particles in the air are precipitated in the water, the rest part becomes clean gas (11), and the clean gas (11) is discharged through the gas outlet pipe (10); all the above components except the air inlet and the air outlet are sealed in the purifier shell (14); the heat source comprises one or a combination of resistance heating elements for heating by electrifying and engine waste heat utilization heating.
2. The steam cleaner for engine exhaust according to claim 1, characterized in that the gas chopper (8) is a closed but permeable chamber, called a mesh chamber (17), formed by a screen (16), and a plurality of mesh chambers (17) of different sizes are coaxially and parallelly nested to form the gas chopper (8), with a certain distance between the layers of the screen.
3. The steam cleaner for engine exhaust according to claim 1, wherein the gas chopper (8) is composed of a tubular cavity (15) and a filter screen (16) arranged therein, the plane of the filter screen (16) is perpendicular to the axial direction of the tubular cavity (15), the periphery of the plane of the filter screen (16) is fitted with the inner wall of the tubular cavity (15), the filter screens (16) are parallel and spaced apart from each other, the wet gas (12) can only pass through the pores of the filter screen (16), and thus the wet gas (12) is forcibly cut into the micro bubbles (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910563977.7A CN112112712A (en) | 2019-06-19 | 2019-06-19 | Steam purifier for engine tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910563977.7A CN112112712A (en) | 2019-06-19 | 2019-06-19 | Steam purifier for engine tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112112712A true CN112112712A (en) | 2020-12-22 |
Family
ID=73796604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910563977.7A Pending CN112112712A (en) | 2019-06-19 | 2019-06-19 | Steam purifier for engine tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112112712A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703721A (en) * | 2022-03-11 | 2022-07-05 | 江苏顺联工程建设有限公司 | Small-size road roller is used in town road repair |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150266032A1 (en) * | 2012-12-26 | 2015-09-24 | Zhiqiang Zhou | Water Ion Air Purifier |
| CN108126460A (en) * | 2017-12-20 | 2018-06-08 | 姚舜 | Dirty method for gas purification based on ultrasonic atomizatio |
| CN108744836A (en) * | 2018-07-30 | 2018-11-06 | 姚舜 | With the method for mist purification dirt gas |
-
2019
- 2019-06-19 CN CN201910563977.7A patent/CN112112712A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150266032A1 (en) * | 2012-12-26 | 2015-09-24 | Zhiqiang Zhou | Water Ion Air Purifier |
| CN108126460A (en) * | 2017-12-20 | 2018-06-08 | 姚舜 | Dirty method for gas purification based on ultrasonic atomizatio |
| CN108744836A (en) * | 2018-07-30 | 2018-11-06 | 姚舜 | With the method for mist purification dirt gas |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114703721A (en) * | 2022-03-11 | 2022-07-05 | 江苏顺联工程建设有限公司 | Small-size road roller is used in town road repair |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209123588U (en) | A kind of new and effective lacquer spraying waste gas integrated treating device | |
| CN106139821A (en) | A kind of zeolite runner Adsorption Concentration purifier | |
| CN107998763A (en) | Paint spray booth's organic waste gas treatment system | |
| CN201747490U (en) | Air filtering device | |
| CN205760628U (en) | A kind of compound waste gas purification apparatus | |
| CN110193262A (en) | A kind of air cleaning unit based on ultrasonic technique | |
| CN210097283U (en) | Air purification device based on ultrasonic technology | |
| CN112112712A (en) | Steam purifier for engine tail gas | |
| CN208130662U (en) | Paint spray booth's organic waste gas treatment system | |
| CN111828209A (en) | Steam purifying type air filter | |
| CN210752104U (en) | VOC exhaust-gas treatment purifies stove | |
| CN205948596U (en) | Package printing industry VOCS exhaust treatment device | |
| CN204072856U (en) | Domestic Water bath type air purifier | |
| CN207762929U (en) | A kind of desorption combustion system of coating cloud exhaust gas | |
| CN109954351A (en) | The method of atomizing sprayer purification smog and dust | |
| CN202803043U (en) | Boiler smoke purifying device | |
| CN210564721U (en) | Exhaust gas purification device for diesel internal combustion engine | |
| CN201320440Y (en) | Furnace smoke dust processor | |
| CN109847559A (en) | A kind of boiler desulfurization dust-extraction unit that flue-gas temperature can be effectively reduced | |
| CN205277551U (en) | Motor vehicle exhaust purifier | |
| CN107754485A (en) | Back flushing type high-temperature flue gas dehumidifying cleaning system based on heat energy utilization | |
| CN211667871U (en) | Ultrasonic atomization oil fume purifying device | |
| CN211676853U (en) | Device for purifying smoke and dust of mist sprayer | |
| CN208418780U (en) | Energy-saving environmental-protection boiler | |
| CN112112711A (en) | Ultrasonic atomization type purifier for engine tail gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |