CN111185091A - Desulfurization and dust removal integrated washing tower - Google Patents
Desulfurization and dust removal integrated washing tower Download PDFInfo
- Publication number
- CN111185091A CN111185091A CN202010030238.4A CN202010030238A CN111185091A CN 111185091 A CN111185091 A CN 111185091A CN 202010030238 A CN202010030238 A CN 202010030238A CN 111185091 A CN111185091 A CN 111185091A
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- shell
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- flue gas
- dust removal
- desulfurization
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/10—Venturi scrubbers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/502—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a desulfurization and dust removal integrated washing tower which comprises a shell and a Venturi tube, wherein the shell is of a hollow cylindrical tubular structure, the bottom of the periphery of the shell is fixedly connected with one end of the Venturi tube, and the shell and the Venturi tube are communicated; the venturi includes cooling zone, choke, diffuser and crooked linkage segment, the equipartition has the first atomizing nozzle of multiunit on the pipeline lateral wall of cooling zone, and the cooling zone is linked together through the choke with the diffuser, the pipeline diameter of choke is less than the pipeline diameter of cooling zone and diffuser, the diffuser is through all sides bottom fixed connection of crooked linkage segment and casing, and the pipeline of crooked linkage segment communicates with each other with the inside of casing. Aiming at the design of the washing tower, the invention can ensure that the flue gas in the tower uniformly rises by effectively utilizing part of kinetic energy of the flue gas, reduce the adherence and upward movement of the flue gas, fully mix the flue gas with spray liquid drops and realize the integrated treatment of dedusting and desulfurizing of the flue gas.
Description
Technical Field
The invention relates to the technical field of exhaust desulfurization application of marine diesel engines, in particular to a desulfurization and dust removal integrated washing tower.
Background
The regulations governing sulfur emissions, enforced by the International Maritime Organization (IMO), will be implemented at 1/2020, which require global 0.5% sulfur limits to be achieved and 0.1% sulfur limits to be achieved by the Emission Control Area (ECA). Wherein SO is treated by a wet desulphurization technologyXThe technology is a mainstream technology at present, in which the exhaust gas of a diesel engine is connected with a desulfurizing tower, a spraying layer is arranged in the desulfurizing tower, alkaline liquid drops are sprayed out of a nozzle and directly contacted with flue gas to generate chemical reaction, SO that SO is removed2。
The washing tower is used as the core equipment of the technology and realizes SO in the exhaust gasXIn the key places of physical dissolution and chemical absorption in the washing liquid, the design of the internal structure of the washing tower has great influence on the movement of a flue gas flow field by the design of a spraying layer, but the current washing tower only mixes the flue gas with alkaline liquid drops sprayed from a nozzle, the flow direction of the flue gas is not controlled, the corrosion of a shell in the washing tower is accelerated, the desulfurization efficiency is totally dependent on the self-mixing of the flue gas and the liquid drops, and the efficiency is extremely low; part of the flue gas is discharged without being treated in time, but the flue gas contains a large amount of noxious substances, such as particulate dust, sulfur oxides, and the like, which are harmful to the atmosphere, particularly in coastal areas.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a desulfurization and dust removal integrated washing tower, which solves the problems that the current washing tower only mixes flue gas with alkaline liquid drops sprayed from a nozzle, the flow direction of the flue gas is not controlled, the corrosion of a shell in the washing tower is accelerated, and the desulfurization efficiency is extremely low.
The technical scheme is as follows: the invention relates to a desulfurization and dust removal integrated washing tower which comprises a shell and a Venturi tube, wherein the shell is of a hollow cylindrical tubular structure, the bottom of the periphery of the shell is fixedly connected with one end of the Venturi tube, and the shell and the Venturi tube are communicated;
the venturi tube comprises a cooling section, a throat tube, a diffusion section and a bent connection section, wherein a plurality of groups of first atomizing nozzles are uniformly distributed on the side wall of the pipeline of the cooling section, the cooling section is communicated with the diffusion section through the throat tube, the diameter of the pipeline of the throat tube is smaller than that of the cooling section and the diffusion section, the diffusion section is fixedly connected with the bottom of the periphery of the shell through the bent connection section, and the pipeline of the bent connection section is communicated with the inside of the shell;
casing axle center department is equipped with vertical setting and inside shower that is hollow structure, the bottom of shower is passed through the bearing and is rotationally installed on the casing, and fixed cover is equipped with conical anti-wind base on the shower, fixedly connected with multiunit is the guide vane of annular array and vertical setting on the conical surface of anti-wind base, guide vane's the pipeline that highly and crooked linkage segment are close to casing one end height the same, be equipped with the vertical decurrent second atomizing nozzle of multiunit on the horizontal spray tube of shower, be equipped with multilayer atomizing nozzle layer on the vertical spray tube of shower, every layer of atomizing nozzle layer includes that the multiunit is the third atomizing nozzle that annular array set up, the nozzle direction of third atomizing nozzle is downwards to one side, and becomes 60 with the horizontal direction.
Furthermore, one end of the pipeline of the bent connecting section, which is close to the shell, is provided with an air deflector. The air deflector enables the flow velocity of the flue gas to be over against the guide vane, so that the guide vane and the spray pipe rotate, and the phenomenon that the power is insufficient when the flue gas is over against the axis can be avoided.
Furthermore, a dust removal groove is arranged on the pipeline of the bent connecting section. At venturi's diffuser segment, the gas-liquid velocity of flow diminishes, and the dust-laden particulate matter in the flue gas condenses into the bigger dust-laden granule of diameter, and deposit in the dust removal groove under the action of gravity, and the dust removal groove plays the collecting action to dust-laden granule.
Further, the bottom of casing is equipped with the leakage fluid dram, the leakage fluid dram is linked together through pipeline and alkali lye pond, alkali lye pond is through pipeline and pump's import sealing connection, and the export of pump is linked together with the inside hollow structure of shower. Realizes simple recycling of the alkali liquor, and omits complex liquid supply equipment.
Further, the nozzle direction of the first atomizing nozzle is inclined downward at 60 ° from the horizontal direction.
Furthermore, the cross section of each guide vane is arc-shaped, the number of the guide vanes is 8-12, and a gap is formed between every two adjacent guide vanes. The guide vanes with arc design can also ensure rotation under the smaller smoke power.
Furthermore, the included angle formed by the conical surface of the counter-wind base and the bottom surface of the counter-wind base is 10 degrees. The first kinetic energy that can guarantee the flue gas can fully be played to guide vane, guarantees that guide vane can move, thereby drives the flue gas and can form the contained angle with vertical face and make the flue gas spiral-lift, and the second can guarantee that alkali lye can slide smoothly and flow in the bottom of casing.
Has the advantages that: aiming at the design of the washing tower, the invention can ensure that the flue gas in the tower uniformly rises by effectively utilizing part of kinetic energy of the flue gas, reduce the adherence and upward movement of the flue gas, fully mix the flue gas with spray liquid drops and realize the integrated treatment of dedusting and desulfurizing of the flue gas.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
FIG. 2 is a schematic view of a connection structure of a spray pipe, a counter-wind base and a guide vane;
FIG. 3 is a top view of the connection of the shower, the counter-wind base and the guide vanes;
FIG. 4 is a schematic view of a connection structure of a counter-wind base and a guide vane;
fig. 5 is a cross-sectional view of the leeward base.
Detailed Description
The invention is further described below with reference to the following figures and examples:
as shown in fig. 1 to 5, the desulfurization and dust removal integrated washing tower of the present invention comprises a shell 1 and a venturi tube 2, wherein the shell 1 is a hollow cylindrical tubular structure, and the bottom of the periphery of the shell 1 is fixedly connected with one end of the venturi tube 2, and the two are communicated;
the Venturi tube 2 comprises a cooling section 21, a throat 22, a diffusion section 23 and a bending connection section 24, one end of a pipeline of the cooling section 21 is a flue gas inlet, four groups of first atomizing nozzles 25 are uniformly distributed on the side wall of the pipeline of the cooling section 21, the four groups of first atomizing nozzles 25 are distributed in an annular array, the nozzle direction of the first atomizing nozzles 25 is inclined downwards and forms 60 degrees with the horizontal direction, the first atomizing nozzles 25 are communicated with an alkali liquor pool (not shown in the figure) through a pipeline and a pump, alkali liquor is sprayed out through the first atomizing nozzles 25, the first atomizing nozzles 25 can reduce the temperature of the flue gas effectively, and the inner wall of the washing tower is prevented from being irreversibly damaged by high temperature; the flue gas can be subjected to acid-base neutralization reaction in advance, so that the desulfurization efficiency is improved; meanwhile, because the gas-liquid two-phase speed difference is large, the liquid drops are atomized under the action of the airflow, so that dust-containing particles in the flue gas are wetted, and the dust-containing particles and the alkaline liquid drops collide with each other and are condensed and grown up;
the cooling section 21 is communicated with the diffusion section 23 through the throat 22, the diameter of the throat 22 is smaller than that of the cooling section 21 and the diffusion section 23, when the sprayed flue gas passes through the throat 22, the space between the dust-containing particles and the alkaline liquid drops is further compressed, the collision probability between the dust-containing particles and the alkaline liquid drops is increased, the degree of agglomeration and growth of the dust-containing particles and the alkaline liquid drops is higher, and medium-diameter dust-containing particles are formed; the medium-diameter dust-containing particles enter the diffusion section 23, the gas-liquid flow velocity is reduced in the diffusion section 23, the pressure is increased again, and the medium-diameter dust-containing particles in the flue gas are condensed into large dust-containing particles with larger diameters;
the diffusion section 23 is fixedly connected with the bottom of the peripheral side of the shell 1 through a bent connection section 24, a pipeline of the bent connection section 24 is communicated with the inside of the shell 1, a dust removal groove 26 is formed in the pipeline of the bent connection section 24, large dust-containing particles with larger diameters in smoke are deposited in the dust removal groove 26 under the action of gravity in the diffusion section 23 of the Venturi tube 2, and the dust removal groove 26 plays a role in collecting the large dust-containing particles;
then the flue gas enters the shell 1 from the bent connecting section 24, one end of the pipeline positioned at the bent connecting section 24, which is close to the shell 1, is provided with an air deflector 27, the air deflector 27 enables the flow velocity of the flue gas to be over against the guide vane 13, so that the guide vane 13 and the spray pipe 11 rotate, and the phenomenon that the power is insufficient when the flue gas is over against the axis can be avoided;
a vertically arranged spray pipe 11 with a hollow structure inside is arranged at the axis of the shell 1, the bottom of the spray pipe 11 is rotatably arranged on the shell 1 through a bearing, and the bearing uses high-low temperature bearing lubricating grease refined by additives such as wear-resistant, oxidation-resistant, rust-resistant and corrosion-resistant, so that the bearing has a corrosion-resistant function; a conical counter-wind base 12 is fixedly sleeved on the spray pipe 11, a plurality of groups of guide vanes 13 which are arranged in an annular array and are vertically arranged are fixedly connected to the conical surface of the counter-wind base 12, and the guide vanes 13 are made of aluminum alloy or stainless steel materials, so that the guide vanes 13 can resist corrosion under the condition of low quality, and the guide vanes 13 can rotate under the action of small power;
the height of the guide vanes 13 is the same as that of one end, close to the shell 1, of the pipeline of the bent connecting section 24, the cross section of each guide vane 13 is arc-shaped, the number of the guide vanes 13 is 8-12, gaps are formed between every two adjacent guide vanes 13, the guide vanes 13 designed in the arc shape can also ensure rotation under smaller smoke power, meanwhile, the shape of the counter-wind base 12 is conical, and an included angle formed by the conical surface of the counter-wind base 12 and the bottom surface of the counter-wind base 12 is 10 degrees, so that the kinetic energy of smoke can be fully transmitted to the guide vanes 13, the guide vanes 13 can be ensured to operate, the smoke can be driven to form an included angle with a vertical surface, the smoke can be spirally lifted, and the sticking upward of the smoke is reduced; secondly, the alkali liquor can be ensured to smoothly slide down and flow into the bottom of the shell 1;
a plurality of groups of second atomizing nozzles 14 which are vertically downward are arranged on a transverse spray pipe 111 of the spray pipe 11, the nozzle angle of the second atomizing nozzles 14 is opposite to the direction of flue gas, a plurality of layers of atomizing nozzle layers are arranged on a vertical spray pipe 112 of the spray pipe 11, each layer of atomizing nozzle layer comprises eight groups of third atomizing nozzles 15 which are arranged in an annular array, the nozzle direction of the third atomizing nozzles 15 is inclined downward and forms 60 degrees with the horizontal direction, the spraying bodies formed by the nozzles of the third atomizing nozzles 15 form an umbrella shape and are coupled with the spraying bodies formed by the nozzles of the second atomizing nozzles 14, the fog drops in two directions are coupled to enable the liquid drops to fill the whole shell 1, the spray pipe 11, the counter-wind base 12 and the guide vanes 13 are made of corrosion-resistant materials, the flue gas enables the guide vanes 13 to move, the guide vanes 13 drive the spray pipe 11 to rotate, the combination of the guide vanes 13 and the counter-wind base 12 has the advantages that the combination of the guide, the flue gas is uniformly mixed and rises, so that the flow direction of the flue gas is guided and controlled, a complex electric power system is not used for driving the spray pipe 11 to rotate, the investment is small, and the equipment maintenance is simple;
when the smoke amount is small, the rotating speed of the guide vanes 13 is slow, the rotating speed of the spray pipe 11 is slow, and the treatment amount is small; when the flue gas amount is large, the rotation speed of the guide vanes 13 is high, the rotation speed of the spray pipe 11 is high, the treatment capacity is large, the spray vanes and the spray pipe form self coupling, spray liquid drops rotate and descend relative to the flue gas, so that the full contact reaction of the flue gas and the liquid drops is increased, the flue gas can be ensured to rotate and uniformly ascend, the disturbance of the spray liquid drops and the flue gas can be effectively improved by the rotation of the spray pipe 11, the mixing of the spray liquid drops and the flue gas is increased, the acid-base neutralization reaction with the flue gas is greatly improved, and the desulfurization;
the bottom of casing 1 is equipped with leakage fluid dram 16, and leakage fluid dram 16 is linked together through pipeline and alkali lye pool 17, and the liquid of collecting in the bottom of casing 1 passes through leakage fluid dram 16 and arranges the alkali lye pool 17 in, is equipped with alkali lye in the alkali lye pool 17, and alkali lye pool 17 passes through the import sealing connection of pipeline and pump 18, and the export of pump 18 is linked together with the inside hollow structure of shower 11, has realized the simple cyclic utilization of alkali lye, has saved complicated confession liquid equipment. Aiming at the design of the washing tower, the invention can ensure that the flue gas in the tower uniformly rises by effectively utilizing part of kinetic energy of the flue gas, reduce the adherence and upward movement of the flue gas, fully mix the flue gas with spray liquid drops and realize the integrated treatment of dedusting and desulfurizing of the flue gas.
Claims (7)
1. The utility model provides a desulfurization dust removal integration scrubbing tower which characterized in that: the venturi tube type air conditioner comprises a shell and a venturi tube, wherein the shell is of a hollow cylindrical tubular structure, the bottom of the peripheral side of the shell is fixedly connected with one end of the venturi tube, and the shell and the venturi tube are communicated;
the venturi tube comprises a cooling section, a throat tube, a diffusion section and a bent connection section, wherein a plurality of groups of first atomizing nozzles are uniformly distributed on the side wall of the pipeline of the cooling section, the cooling section is communicated with the diffusion section through the throat tube, the diameter of the pipeline of the throat tube is smaller than that of the cooling section and the diffusion section, the diffusion section is fixedly connected with the bottom of the periphery of the shell through the bent connection section, and the pipeline of the bent connection section is communicated with the inside of the shell;
casing axle center department is equipped with vertical setting and inside shower that is hollow structure, the bottom of shower is passed through the bearing and is rotationally installed on the casing, and fixed cover is equipped with conical anti-wind base on the shower, fixedly connected with multiunit is the guide vane of annular array and vertical setting on the conical surface of anti-wind base, guide vane's the pipeline that highly and crooked linkage segment are close to casing one end height the same, be equipped with the vertical decurrent second atomizing nozzle of multiunit on the horizontal spray tube of shower, be equipped with multilayer atomizing nozzle layer on the vertical spray tube of shower, every layer of atomizing nozzle layer includes that the multiunit is the third atomizing nozzle that annular array set up, the nozzle direction of third atomizing nozzle is downwards to one side, and becomes 60 with the horizontal direction.
2. The integrated washing tower for desulfurization and dust removal according to claim 1, characterized in that: and one end of the pipeline of the bent connecting section, which is close to the shell, is provided with an air deflector.
3. The integrated washing tower for desulfurization and dust removal according to claim 1, characterized in that: and a dust removal groove is arranged on the pipeline of the bent connecting section.
4. The integrated washing tower for desulfurization and dust removal according to claim 1, characterized in that: the bottom of casing is equipped with the leakage fluid dram, the leakage fluid dram is linked together through pipeline and alkali lye pond, alkali lye pond is through pipeline and pump import sealing connection, and the export of pump is linked together with the inside hollow structure of shower.
5. The integrated washing tower for desulfurization and dust removal according to claim 1, characterized in that: the nozzle direction of the first atomizing nozzle is inclined downwards and forms 60 degrees with the horizontal direction.
6. The integrated washing tower for desulfurization and dust removal according to claim 1, characterized in that: the cross section of each guide vane is arc-shaped, the number of the guide vanes is 8-12, and a gap is formed between every two adjacent guide vanes.
7. The integrated washing tower for desulfurization and dust removal according to claim 1, characterized in that: the included angle formed by the conical surface of the counter-wind base and the bottom surface of the counter-wind base is 10 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010030238.4A CN111185091A (en) | 2020-01-13 | 2020-01-13 | Desulfurization and dust removal integrated washing tower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010030238.4A CN111185091A (en) | 2020-01-13 | 2020-01-13 | Desulfurization and dust removal integrated washing tower |
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| Publication Number | Publication Date |
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| CN111185091A true CN111185091A (en) | 2020-05-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010030238.4A Pending CN111185091A (en) | 2020-01-13 | 2020-01-13 | Desulfurization and dust removal integrated washing tower |
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| CN (1) | CN111185091A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112191075A (en) * | 2020-09-11 | 2021-01-08 | 广东省肇庆华格生物科技有限公司 | Moisture-removing type device for directionally recovering methyl chloride in waste gas generated in production of maltol |
| CN112973322A (en) * | 2021-02-04 | 2021-06-18 | 内江市香趣食品有限公司 | Novel water smoke dust removal sulphur removal smoke abatement equipment |
| CN113245751A (en) * | 2021-04-15 | 2021-08-13 | 庄勇全 | Linkage type closed dust removal and smoke purification device of numerical control plasma cutting machine |
| CN113863971A (en) * | 2021-10-31 | 2021-12-31 | 太原理工大学 | Safety ventilation device for coal mine and working method |
| CN114146522A (en) * | 2021-11-30 | 2022-03-08 | 华能吉林发电有限公司长春热电厂 | Venturi wet dust removal device |
| CN114570169A (en) * | 2022-05-09 | 2022-06-03 | 山东神驰化工集团有限公司 | Ammonia water loading ammonia recovery system |
| CN115006966A (en) * | 2022-07-07 | 2022-09-06 | 深圳华创生态环境科技有限公司 | Waste gas treatment device for waste engine oil regeneration process |
| CN117065489A (en) * | 2023-10-17 | 2023-11-17 | 四川铸创安全科技有限公司 | Spray type dust fall device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112191075A (en) * | 2020-09-11 | 2021-01-08 | 广东省肇庆华格生物科技有限公司 | Moisture-removing type device for directionally recovering methyl chloride in waste gas generated in production of maltol |
| CN112973322A (en) * | 2021-02-04 | 2021-06-18 | 内江市香趣食品有限公司 | Novel water smoke dust removal sulphur removal smoke abatement equipment |
| CN113245751A (en) * | 2021-04-15 | 2021-08-13 | 庄勇全 | Linkage type closed dust removal and smoke purification device of numerical control plasma cutting machine |
| CN113245751B (en) * | 2021-04-15 | 2024-03-08 | 庄勇全 | Linkage type closed dedusting and smoke purifying device for numerical control plasma cutting machine |
| CN113863971A (en) * | 2021-10-31 | 2021-12-31 | 太原理工大学 | Safety ventilation device for coal mine and working method |
| CN113863971B (en) * | 2021-10-31 | 2024-08-09 | 太原理工大学 | Safety ventilation device for coal mine and working method |
| CN114146522B (en) * | 2021-11-30 | 2023-02-03 | 华能吉林发电有限公司长春热电厂 | Venturi wet dust removal device |
| CN114146522A (en) * | 2021-11-30 | 2022-03-08 | 华能吉林发电有限公司长春热电厂 | Venturi wet dust removal device |
| CN114570169B (en) * | 2022-05-09 | 2022-07-08 | 山东神驰化工集团有限公司 | Ammonia water loading ammonia recovery system |
| CN114570169A (en) * | 2022-05-09 | 2022-06-03 | 山东神驰化工集团有限公司 | Ammonia water loading ammonia recovery system |
| CN115006966A (en) * | 2022-07-07 | 2022-09-06 | 深圳华创生态环境科技有限公司 | Waste gas treatment device for waste engine oil regeneration process |
| CN117065489A (en) * | 2023-10-17 | 2023-11-17 | 四川铸创安全科技有限公司 | Spray type dust fall device |
| CN117065489B (en) * | 2023-10-17 | 2023-12-15 | 四川铸创安全科技有限公司 | Spray type dust fall device |
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Application publication date: 20200522 |