CN203437004U - High-flue gas-velocity PM2.5 flue gas and pollutant wet flue gas purification system - Google Patents
High-flue gas-velocity PM2.5 flue gas and pollutant wet flue gas purification system Download PDFInfo
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- CN203437004U CN203437004U CN201320556904.3U CN201320556904U CN203437004U CN 203437004 U CN203437004 U CN 203437004U CN 201320556904 U CN201320556904 U CN 201320556904U CN 203437004 U CN203437004 U CN 203437004U
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- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The utility model relates to a high-flue gas-velocity PM2.5 flue gas and pollutant wet flue gas purification system and method, solves the technical problem that the PM2.5 flue gas with the flow velocity being not less than above 2 m/s and pollutants are poor in removal effect, and belongs to the technical field of atmospheric pollution treatment. The purification system is characterized in that a flue gas treatment tower is sequentially divided into a wet desulfurization section, a flue gas uniformly-distributed section and a pollutant integrated removal section from bottom to top; a spray device is arranged at the upper end of the wet desulfurization section and used for desulfurization through spraying; the flue gas uniformly-distributed section is used for uniformly distributing and expanding or slowing down the flue gas; the pollutant integrated removal section is provided with a wet electric precipitation device for removing pollutants. The purification system has the benefits that wet desulfurization purification and wet electric precipitation purification are combined into the same flue gas treatment tower to effectively remove pollutant particles, heavy metal, acid fog, aerosol, escaped ammonia and the like in the flue gas, the purification efficiency of the flue gas is high, and through the combination of water/gas film spray nozzle and a water film spray nozzle, the consumption of flushing water is reduced greatly, the water recovery rate is high, and the environment-friendly and energy-saving needs are met.
Description
Technical field
The utility model belongs to air contaminant treatment technical field, particularly a kind of high cigarette speed PM2.5 and pollutant Wet smoke cleaning system.
Background technology
Along with country more and more payes attention to environmental protection, fine particle, SO
3agenda that the reduction of discharging of the pollutant that acid mist, heavy metal (as mercury) etc. exist with aerosol form is referred, the new < < ambient air quality > > of country requires significantly to improve to original discharge standard, includes mercury, PM2.5 in ambient air quality simultaneously.In January, 2013,28， China Meteorological Administration was listed as the meteorological elements such as the reflection PM2.5 concentration of air quality and atmospheric visibility, relative humidity the important indicator of early warning classification first.
At present, the flue gas desulfurization technique overwhelming majority of coal-burning power plant adopts Wet Flue Gas Desulfurization Technology (WFGD), the Limestone-gypsum Wet Flue Gas Desulfurization Process that is being wherein most widely used purifies, and this purifications is usingd lime stone slurry and as absorbent, flue gas carried out to desulfurization processing, generation desulfurizing byproduct gypsum.Limestone-gypsum Wet Flue Gas Desulfurization Process purifies the impact that is subject to the factors such as flue gas heat exchange and demister removal efficiency, easily forms " gypsum rain " phenomenon, causes serious environmental pollution and equipment corrosion.Except Limestone-gypsum Wet Flue Gas Desulfurization Process purifies, also there are the purifications such as the wet desulphurization of the ammonia process of employing, white clay wet desulphurization and carbide slag wet desulphurization, after these wet desulphurizations purify, in flue gas, may have fine particle, aerosol, ease ammonia, heavy metal (as mercury) ion, SO
3the pollutants such as acid mist.How effectively to alleviate fine particle, aerosol, and effectively alleviate wet desulphurization purification unescapable gypsum fine grained (i.e. " gypsum rain ") and SO
3impact on environment, reduces the harm that PM2.5 fine particulates, heavy metal ion bring health effectively, has become the task of top priority that current atmosphere pollution is administered industry.
After new air quality standard is put into effect, traditional smoke gas treatment equipment can not reach desirable regulation effect.Dry electric precipitation device is for fine particle, SO
3the pollutant that acid mist, heavy metal (as mercury) etc. exist with aerosol form is not removed ability substantially; Wet-esp technology is the effective means that solves above-mentioned technical barrier, but existing wet electrical dust precipitator is mainly used in outside tower as single special equipment, and floor space is larger.The flue gas flow rate that existing electric dust-removing equipment requires is in addition all lower, very poor for its removal effect of the above flue gas of flue gas flow rate >=2m/s; Tower body increases, and has improved again equipment center of gravity, has greatly increased device security hidden danger and design and construction difficulty.
Summary of the invention
The purpose of this utility model is the shortcoming that overcomes prior art, and a kind of high cigarette speed PM2.5 and pollutant Wet smoke cleaning system are provided, can be under high cigarette speed (flue gas flow rate>=2m/s) condition, efficient, collaboratively remove the SO in flue gas
2, fine particle, heavy metal (as mercury), the aerosol such as PM2.5 and SO that wet desulphurization produced
3the multiple pollutants such as acid mist, meet the requirement of environmental protection.
In order to achieve the above object, the technical scheme that Bian uses is: high cigarette speed PM2.5 and pollutant Wet smoke cleaning system, comprise: smoke gas treatment tower, the slurries recirculation unit, absorbent preparation device, gypsum dehydration treating apparatus and the water treatment facilities that are connected with described smoke gas treatment tower pipeline respectively, is characterized in that; Bottom-up wet desulphurization section, flue gas even distribution section and the integrated section of removing of pollutant of being divided into successively of described smoke gas treatment tower; Described wet desulphurization section upper end is at least equipped with one deck for the spray equipment of spray-absorption agent, and below is equipped with absorbent slurry pond, and between described spray equipment and absorbent slurry pond, described smoke gas treatment tower tower wall is equipped with a gas approach; Described flue gas even distribution section lower end smoke gas flow entrance is built-in with flue gas even distribution device, and upper end is flue gas extension diameter section, and its bore is bottom-up with progressively hole enlargement of flue gas flow direction, and the upper end of described flue gas extension diameter section is connected and communicates with the integrated section of removing of described pollutant; The integrated section of removing of described pollutant, comprises Wet type electric dust-removing device and exhanst gas outlet thereof.
Described Wet type electric dust-removing device comprises: battery lead plate, corona wire, water/gas film nozzle, moisture film nozzle and electric control gear, is characterized in that: the longitudinally spaced and parallel setting each other of described battery lead plate and described corona wire, and leave each other spacing; Described water/gas film nozzle quantity has a plurality of, is placed in the top of described Wet type electric dust-removing device, and tile horizontally evenly arranges; Described moisture film nozzle quantity has a plurality of, is placed in the below of described battery lead plate and corona wire, and tile horizontally evenly arranges.
Described water/gas film nozzle, is placed in the top of described battery lead plate and corona wire, and tile horizontally evenly arranges.
Described water/gas film nozzle is placed in the top of described Wet type electric dust-removing device, and tile horizontally is evenly arranged between described each battery lead plate, longitudinally at least one deck, evenly configuration.
Slurry pump in described gypsum dehydration treating apparatus, one end is communicated with absorbent slurry pond, pollutant in absorbent slurry pond is discharged to smoke gas treatment tower, the other end is connected and communicates with hydrocyclone, vacuum belt dewaterer, automatic filtering unit, reflux tank successively pipeline, carries out Separation of Solid and Liquid processing; The water purification obtaining after treatment in described reflux tank, is connected with described Wet type electric dust-removing device pipeline by backflow water pump, for described water/gas film nozzle and moisture film nozzle provide wash water.
Described water/gas film nozzle spray medium is water or compressed air, and described moisture film nozzle spray medium is water.
The beneficial effects of the utility model are: Wet smoke cleaning system and purification method that the utility model provides, wet desulphurization and wet-esp purification are integrated in same smoke gas treatment tower, be applicable to the above high flue gas flow rate condition of flue gas flow rate 2m/s, to various pollutants in fume as SO
2, particle, heavy metal (such as mercury) and the SO such as PM2.5
3acid mist, aerosol, ease ammonia etc. all can effectively be removed, and have improved the purification efficiency of flue gas, have reduced floor space.The arrangement of nozzles mode that adopts water/gas film nozzle and moisture film nozzle to combine can significantly reduce the use amount of flushing water, and can reduce the water being pulled away under high speed flue gas condition, further improve the rate of recovery of water, reduce use amount, improve the operation stability of whole cleaning system.
accompanying drawing explanation:
By accompanying drawing, illustrate that the utility model is described in further detail with embodiment below.
Fig. 1 is the high cigarette speed PM2.5 of the utility model and pollutant Wet smoke cleaning system structural representation.
Fig. 2 is one of the interior water/gas film nozzle of Wet type electric dust-removing device and moisture film nozzle arrangement mode structural representation (water/gas film nozzle is placed in the top of described battery lead plate and corona wire);
Fig. 3 is two (water/gas film nozzle tile horizontally is arranged between each battery lead plate, longitudinal three-decker, the horizontal horizontal of water inlet pipe) of the interior water/gas film nozzle of Wet type electric dust-removing device and moisture film nozzle arrangement mode structural representation;
Fig. 4 is the local amplification assumption diagram of the A of Fig. 3;
Fig. 5 is that the B of Fig. 3 is to structural representation (the horizontal horizontal of water/gas film nozzle water inlet pipe);
Fig. 6 is three (water/gas film nozzle tile horizontally is arranged between each battery lead plate, longitudinal three-decker, longitudinal vertical setting of water inlet pipe) of the interior water/gas film nozzle of Wet type electric dust-removing device and moisture film nozzle arrangement mode structural representation;
Fig. 7 is that the C of Fig. 6 is to structural representation.
In figure:
| 1 Wet smoke is administered tower | 2 flue gas extension diameter sections | 3 flue gas even distribution devices |
| 4 Wet type electric dust-removing |
401 |
402 |
| 403 water/ |
404 |
405 water inlet pipes |
| 5 gas approach | 6 spray equipments | 7 absorbent slurry ponds |
| 8 exhaust gases passes | 9 exhanst gas outlets | 10 slurry pumps |
| 11 hydrocyclones | 12 vacuum belt dewaterers | 13 automatic filtering units |
| 14 reflux tanks | 15 backflow water pumps | ? |
the specific embodiment:
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, discloses preferred embodiment of the present utility model, be intended to make those of ordinary skills can understand and implement the utility model, not in order to limit the utility model.Should be appreciated that protection domain of the present utility model is when being as the criterion with the scope that claims were defined.
Fig. 1 is the high cigarette speed PM2.5 of the utility model and pollutant Wet smoke cleaning system structural representation, as shown in the figure, the utility model comprises: smoke gas treatment tower 1, the slurries recirculation unit, absorbent preparation device, gypsum dehydration treating apparatus and the water treatment facilities that are connected with described smoke gas treatment tower 1 pipeline respectively, is characterized in that; Bottom-up wet desulphurization section, flue gas even distribution section and the integrated section of removing of pollutant of being divided into successively of described smoke gas treatment tower 1; Described wet desulphurization section upper end is at least equipped with one deck for the spray equipment 6 of spray-absorption agent, and below is equipped with absorbent slurry pond 7, and between described spray equipment 6 and absorbent slurry pond 7, described smoke gas treatment tower 1 tower wall is equipped with a gas approach 5; Described flue gas even distribution section lower end smoke gas flow entrance is built-in with flue gas even distribution device 3, and upper end is flue gas extension diameter section 2, and its bore is bottom-up with progressively hole enlargement of flue gas flow direction, and the upper end of described flue gas extension diameter section 2 is connected and communicates with the integrated section of removing of described pollutant; The integrated section of removing of described pollutant, comprises Wet type electric dust-removing device 4 and the exhanst gas outlet 9 being connected with described Wet type electric dust-removing device 4.
Fig. 2 is one of the interior water/gas film nozzle of Wet type electric dust-removing device and moisture film nozzle arrangement mode structural representation, illustrating described Wet type electric dust-removing device 4 comprises: battery lead plate 402, corona wire 401, water/gas film nozzle 403, moisture film nozzle 404 and electric control gear, it is characterized in that: the longitudinally spaced and parallel setting each other of described battery lead plate 402 and described corona wire 401, and leave each other spacing; Described water/gas film nozzle 403 quantity have a plurality of, are placed in the top of described battery lead plate and corona wire, and tile horizontally evenly arranges; Described moisture film nozzle 404 quantity have a plurality of, are placed in the bottom of described Wet type electric dust-removing device 4, the below of described battery lead plate 402 and corona wire 401, and tile horizontally evenly arranges.
Fig. 3～Fig. 7 is respectively water/gas film nozzle and the another two kinds of configuration mode structural representations of moisture film nozzle in Wet type electric dust-removing device, illustrate the top that described water/gas film nozzle 403 is placed in described Wet type electric dust-removing device 4, tile horizontally is evenly arranged between described each battery lead plate 402, longitudinal one deck at least, even laminating configuration (longitudinally take three layers in figure as example), described moisture film nozzle 404 quantity have a plurality of, are placed in the below of described battery lead plate 402 and corona wire 401, and tile horizontally evenly arranges.Shown in Fig. 3～Fig. 5, described water/gas film nozzle water inlet pipe 405 is vertical with described corona wire 401; Shown in Fig. 6～Fig. 7, described water/gas film nozzle water inlet pipe 405 is parallel with described corona wire 401.
It is any no matter described water/gas film nozzle 403 arrangements select in Fig. 2～Fig. 7, and the equal tile horizontally of moisture film nozzle 404 of described Wet type electric dust-removing device 4 is arranged at the below (Fig. 2,3 and Fig. 6) of battery lead plate 402.
Described slurries recirculation unit, absorbent preparation device, gypsum dehydration treating apparatus and water treatment facilities are connected with described smoke gas treatment tower 1 respectively, in wherein said gypsum dehydration treating apparatus, slurry pump 10 one end are communicated with absorbent slurry pond 7, the pollutant and the absorbent slurry spray that are rinsed in absorbent slurry pond 7 are processed to the rear gypsum discharge smoke gas treatment tower 1 generating, through gypsum dehydration treating apparatus dehydration recovery.The other end is connected and communicates with hydrocyclone 11, vacuum belt dewaterer 12, automatic filtering unit 13, reflux tank 14 successively pipeline, carries out Separation of Solid and Liquid processing; The interior water purification of described reflux tank 14 is connected with described Wet type electric dust-removing device 4 pipelines by backflow water pump 15, according to actual condition, the pH of the required water in difference in functionality district of device change is regulated to its pH, the water purification that obtains meeting rinsing requirement provides wash water for water/gas film nozzle 403 and moisture film nozzle 404.
Described water/gas film nozzle 403 spray media are water or compressed air, and described moisture film nozzle (404) spray medium is water.When described water/gas film nozzle 403, moisture film nozzle 404 are when all adopting water to be scouring media, water/gas film nozzle 403 is formed and is connected in parallel by pipeline and backflow water pump 15 with moisture film nozzle 404; It is scouring media, moisture film nozzle 404 while adopting water to be scouring media that described water/gas film nozzle 403 adopts compressed air, and moisture film nozzle 404 is connected with backflow water pump 15 by pipeline.
The purification method of utilizing described high cigarette speed (flue gas flow rate >=2m/s) PM2.5 and pollutant Wet smoke cleaning system, comprises the steps:
1) spray desulfurization is processed: flue gas (can determine whether need through pretreatment according to operating mode) enters smoke gas treatment tower 1 through exhaust gases passes 8 by smoke inlet 5, and spray equipment 6, to flue gas spray-absorption agent slurries, sprays processing to flue gas.Described absorbent is selected lime, carbide slag or white clay; The flue-gas temperature at described smoke inlet 5 places is 115～155 ℃.In this step, by the SO in flue gas
2with minority SO
3absorb, to the dust in flue gas, metal oxide (mercury etc.), fine particulates (PM2.5/PM
10) etc. carry out moistening modified and tentatively absorb;
Flue gas pretreatment, refers to that by SCR, purifying (selective-catalytic-reduction denitrified method) carries out denitration pretreatment, or by dry electrostatic cleaner, sack cleaner or electrostatic fabric filter, flue gas is carried out to pre-dust removal process,
2) flue gas even distribution reduction of speed: flue gas rises through flue gas even distribution device 3, enters hole enlargement linkage section 2, flue gas even distribution reduction of speed is processed;
3) pollutant removing is processed: the flue gas after absorbent slurry spray is processed, by hole enlargement linkage section 2 reductions of speed, enter Wet type electric dust-removing device 4, and the pollutant in flue gas is removed to processing.By electric control gear, control corona wire 401 electric discharges, make the pollutant in flue gas under the effect of electric field, be adsorbed on battery lead plate 402, by water/gas film nozzle 403 adopt from top to bottom water/gas to battery lead plate 402 rinse, moisture film nozzle 404 adopts water to rinse battery lead plate 402 from bottom to top, the pollutant being adsorbed on battery lead plate 402 is rinsed in absorbent slurry pond 7.In this step, make dust, metal oxide (mercury etc.), fine particulates (PM2.5/PM in flue gas
10) and hydrone with charged, under the effect of electric field, with charged pollutant is heavy, be attached on the battery lead plate 402 of Wet type electric dust-removing device 4, and rinse and bring pollutant into absorbent slurry pond 7 by continuing mobile water/gas film on battery lead plate 402.Finally complete the purification of flue gas, by exhanst gas outlet 9, discharged.If necessary, exhanst gas outlet 9 also can be set up the efficient demister of one deck to reach the object being further purified.
At 300MW thermal power generation unit, coal-fired sulfur content is 2.1%～2.9%, and the exhaust gas volumn that boiler produces is 105～1,300,000 Nm
3/ h, SO
2content 500～6800mg/Nm
3, flue gas enters smoke gas treatment tower 1 through exhaust gases passes 8 by smoke inlet 5, and inlet temperature is 105 ℃～145 ℃.Flue gas carries out spray-absorption after entering smoke gas treatment tower 1, and spray equipment 6 ejection absorbent slurries are by the SO in flue gas
2with minority SO
3absorb, to the dust in flue gas, heavy metal (as mercury etc.), fine particle (PM2.5/PM
10) etc. carry out moistening and tentatively absorb, in flue gas, steam reaches capacity, and carries out modifiedly for 4 pairs of various contaminant particles of follow-up Wet type electric dust-removing device are charged, the slurries after absorption enter absorbent slurry pond 7, by circulating pump 12, squeeze into spray equipment 6 again.Flue gas after modified enters hole enlargement linkage section 2 and flue gas even distribution device wherein 3, and flue gas is carried out to uniform reduction of speed processing; Flue gas continues to rise and enters Wet type electric dust-removing device 4, and corona wire 401 electric discharges, make dust, metal oxide (mercury etc.), fine particulates (PM2.5/PM in flue gas
10) and moisture subband charged, under the effect of electric field, with charged pollutant is heavy, be attached on battery lead plate 402.Water/gas film nozzle 403 sprays compressed air rinsing under nominal situation, only at unusual service condition (as more in dust stratification, under the rising of portion nozzle retaining pressure or maintenance condition) water feeding and washing.Moisture film nozzle 404 water supply water spray films.By water/gas film nozzle 403 adopt from top to bottom water/gas to battery lead plate 402 rinse, moisture film nozzle 404 adopts water to rinse battery lead plate 402 from bottom to top, brings the pollutant being adsorbed on battery lead plate 402 into absorbent slurry pond 7.Water/gas film nozzle 403 and moisture film nozzle 404 wash waters are that the water purification obtaining after automatic filtering unit 13 is processed recycles.The arrangement of nozzles mode that adopts water/gas film nozzle and moisture film nozzle to combine can significantly reduce the use amount of flushing water, and can reduce the water being pulled away under high speed flue gas condition, further improve the rate of recovery of water, reduce use amount, the present embodiment is discharged clean flue gas by exhanst gas outlet 9
.high cigarette speed (flue gas flow rate>=2m/s) PM2.5 and pollutant Wet smoke cleaning system and method that the utility model provides, combine wet desulphurization in same smoke gas treatment tower with wet-esp purification, to various pollutants in fume as SO
2, particle, heavy metal (such as mercury) and the SO such as PM2.5
3acid mist, aerosol, ease ammonia etc. all can effectively be removed, and the purification efficiency of flue gas is high; The arrangement of nozzles mode that adopts water/gas film nozzle and moisture film nozzle to combine significantly reduces the use amount of flushing water, energy-conserving and environment-protective.
Claims (4)
1. one kind high cigarette speed PM2.5 and pollutant Wet smoke cleaning system, comprise: smoke gas treatment tower, the slurries recirculation unit, absorbent preparation device, gypsum dehydration treating apparatus and the water treatment facilities that are connected with described smoke gas treatment tower pipeline respectively, is characterized in that; Bottom-up wet desulphurization section, flue gas even distribution section and the integrated section of removing of pollutant of being divided into successively of described smoke gas treatment tower; Described wet desulphurization section upper end is at least equipped with one deck for the spray equipment of spray-absorption agent, and below is equipped with absorbent slurry pond, and between described spray equipment and absorbent slurry pond, described smoke gas treatment tower tower wall is equipped with a gas approach; Described flue gas even distribution section lower end smoke gas flow entrance is built-in with flue gas even distribution device, and upper end is flue gas extension diameter section, and its bore is bottom-up with progressively hole enlargement of flue gas flow direction, and the upper end of described flue gas extension diameter section is connected and communicates with the integrated section of removing of described pollutant; The integrated section of removing of described pollutant, comprises Wet type electric dust-removing device and exhanst gas outlet thereof.
2. high cigarette speed PM2.5 and pollutant Wet smoke cleaning system according to claim 1, described Wet type electric dust-removing device comprises: battery lead plate, corona wire, water/gas film nozzle, moisture film nozzle and electric control gear, it is characterized in that: the longitudinally spaced and parallel setting each other of described battery lead plate and described corona wire, and leave each other spacing; Described water/gas film nozzle quantity has a plurality of, is placed in the top of described Wet type electric dust-removing device, and tile horizontally evenly arranges, at least one deck; Described moisture film nozzle quantity has a plurality of, is placed in the bottom of described Wet type electric dust-removing device, the below of described battery lead plate and corona wire, and transverse horizontal evenly arranges.
3. high cigarette speed PM2.5 and pollutant Wet smoke cleaning system according to claim 2, is characterized in that: described water/gas film nozzle is placed in the top of described battery lead plate and corona wire, and tile horizontally evenly arranges.
4. high cigarette speed PM2.5 and pollutant Wet smoke cleaning system according to claim 2, it is characterized in that: described water/gas film nozzle is placed in the top of described Wet type electric dust-removing device, tile horizontally is evenly arranged between described each battery lead plate, longitudinally at least one deck, evenly configuration.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320556904.3U CN203437004U (en) | 2013-09-09 | 2013-09-09 | High-flue gas-velocity PM2.5 flue gas and pollutant wet flue gas purification system |
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|---|---|---|---|
| CN201320556904.3U CN203437004U (en) | 2013-09-09 | 2013-09-09 | High-flue gas-velocity PM2.5 flue gas and pollutant wet flue gas purification system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480223A (en) * | 2013-09-09 | 2014-01-01 | 上海龙净环保科技工程有限公司 | Wet-type fume purification system and purification method for high smoke speed PM2.5 and pollutant |
| CN103949129A (en) * | 2014-04-24 | 2014-07-30 | 大连拓新能源有限公司 | Efficient and intelligent oil smoke purification system and method |
| CN109252918A (en) * | 2018-09-30 | 2019-01-22 | 金涛 | A kind of Fractions of Diesel Engine Exhaust Particulates object processing system |
-
2013
- 2013-09-09 CN CN201320556904.3U patent/CN203437004U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103480223A (en) * | 2013-09-09 | 2014-01-01 | 上海龙净环保科技工程有限公司 | Wet-type fume purification system and purification method for high smoke speed PM2.5 and pollutant |
| CN103480223B (en) * | 2013-09-09 | 2015-05-20 | 上海龙净环保科技工程有限公司 | Wet-type fume purification system and purification method for high smoke speed PM2.5 and pollutant |
| CN103949129A (en) * | 2014-04-24 | 2014-07-30 | 大连拓新能源有限公司 | Efficient and intelligent oil smoke purification system and method |
| CN103949129B (en) * | 2014-04-24 | 2015-12-09 | 大连拓新能源有限公司 | High efficiency smart lampblack purifying system and purification method |
| CN109252918A (en) * | 2018-09-30 | 2019-01-22 | 金涛 | A kind of Fractions of Diesel Engine Exhaust Particulates object processing system |
| CN109252918B (en) * | 2018-09-30 | 2024-04-19 | 金涛 | Diesel engine tail gas particulate matter processing system |
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Granted publication date: 20140219 |