CN116351835A - Waste gas treatment method in foundry - Google Patents

Waste gas treatment method in foundry Download PDF

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CN116351835A
CN116351835A CN202111571168.4A CN202111571168A CN116351835A CN 116351835 A CN116351835 A CN 116351835A CN 202111571168 A CN202111571168 A CN 202111571168A CN 116351835 A CN116351835 A CN 116351835A
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waste gas
exhaust gas
foundry
treatment
gas treatment
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郑志勋
袁亮
郑金文
张茂员
张敏
奚淘
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WUHU YONGYU AUTOCAR INDUSTRIAL CO LTD
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WUHU YONGYU AUTOCAR INDUSTRIAL CO LTD
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultraviolet radiation
    • A61L9/205—Ultraviolet radiation using a photocatalyst or photosensitiser
    • 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
    • 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
    • B01D53/007—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 by irradiation
    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • 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
    • B01D53/14—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 by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/75—Multi-step processes
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77—Liquid phase processes
    • B01D53/78—Liquid phase processes with gas-liquid contact
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/869—Multiple step processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents
    • B01D2253/102—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/80—Type of catalytic reaction
    • B01D2255/802—Photocatalytic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Chemical Kinetics & Catalysis (AREA)
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  • Treating Waste Gases (AREA)

Abstract

The invention discloses a foundry waste gas treatment method, which comprises the following steps: s1, running a fan, and converging waste gas by a waste gas collecting cover in a foundry; s2, conveying the waste gas to a scrubber for treatment; s3, the waste gas treated by the gas washer enters waste gas treatment equipment for treatment; s4, the waste gas treated by the waste gas treatment equipment is discharged outwards through an exhaust pipe; wherein, exhaust gas collection covers set up a plurality ofly, and each exhaust gas collection cover is located the top of a casting equipment respectively. The waste gas treatment method for the foundry can improve the waste gas collection and treatment effect.

Description

铸造车间废气处理方法Waste gas treatment method in foundry

技术领域technical field

本发明属于废气处理技术领域，具体地说，本发明涉及一种发动机缸盖铸造车间废气处理方法。The invention belongs to the technical field of waste gas treatment, in particular, the invention relates to a method for treating waste gas in an engine cylinder head casting workshop.

背景技术Background technique

发动机缸盖在铸造生产过程中会产生大量的工业废气，废气主要集中在铸造车间，主要污染物为铸造加热中产生的树脂废气-三苯、总烃等废气及铸造本身废气酸气、氨气等污染物。因车间废气量较大，现有的废气收集系统因收集气体量较小，而无法将车间内产生的废气进行全部收集，收集和处理效果较差，收集效率低。The engine cylinder head will produce a large amount of industrial waste gas during the casting production process. The waste gas is mainly concentrated in the foundry workshop. The main pollutants are the resin waste gas-triphenyl, total hydrocarbon and other waste gas generated during casting heating, as well as the waste gas of the casting itself, acid gas and ammonia gas. and other pollutants. Due to the large amount of exhaust gas in the workshop, the existing exhaust gas collection system cannot collect all the exhaust gas generated in the workshop due to the small amount of collected gas, the collection and treatment effect is poor, and the collection efficiency is low.

发明内容Contents of the invention

本发明旨在至少解决现有技术中存在的技术问题之一。为此，本发明提供一种发动机缸盖铸造车间废气处理方法，目的是提高废气处理效果。The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention provides a method for treating exhaust gas in an engine cylinder head foundry, with the purpose of improving the effect of exhaust gas treatment.

为了实现上述目的，本发明采取的技术方案为：铸造车间废气处理方法，包括步骤：In order to achieve the above object, the technical solution adopted by the present invention is: a method for treating waste gas in a foundry, comprising the steps of:

S1、风机运转，由铸造车间内的废气收集罩汇聚废气；S1. The fan is running, and the exhaust gas is collected by the exhaust gas collection cover in the foundry;

S2、废气被输送至洗气机进行处理；S2. The exhaust gas is transported to the scrubber for processing;

S3、经洗气机处理后的废气进入废气处理设备进行处理；S3. The exhaust gas treated by the scrubber enters the exhaust gas treatment equipment for treatment;

S4、经废气处理设备处理后的废气由排气管向外排放；S4. The exhaust gas treated by the exhaust gas treatment equipment is discharged from the exhaust pipe;

其中，废气收集罩设置多个，各个废气收集罩分别位于一个铸造设备的上方。Wherein, a plurality of exhaust gas collection covers are provided, and each exhaust gas collection cover is respectively located above a casting equipment.

所述废气收集罩通过废气输送管路与所述洗气机连接。The waste gas collection cover is connected with the gas scrubber through a waste gas delivery pipeline.

所述废气处理设备为光氧化废气处理设备。The waste gas treatment equipment is photo-oxidation waste gas treatment equipment.

所述废气处理设备具有四个依次布置的光氧化处理区和一个活性炭吸附区，来自所述洗气机废气依次流经四个光氧化处理区和活性炭吸附区。The exhaust gas treatment equipment has four photo-oxidation treatment areas and an activated carbon adsorption area arranged in sequence, and the exhaust gas from the scrubber flows through the four photo-oxidation treatment areas and the activated carbon adsorption area in sequence.

所述风机为节能环保离心风机。The fan is an energy-saving and environment-friendly centrifugal fan.

本发明的铸造车间废气处理方法，可以提高废气收集和处理效果。The method for treating exhaust gas in a foundry of the invention can improve the effect of collecting and treating exhaust gas.

附图说明Description of drawings

本说明书包括以下附图，所示内容分别是：This manual includes the following drawings, the contents shown are:

图1是本发明铸造车间废气处理方法的流程图；Fig. 1 is the flowchart of foundry waste gas treatment method of the present invention;

图2是废气处理系统的结构示意图；Fig. 2 is a structural schematic diagram of the waste gas treatment system;

图中标记为：Labeled in the figure:

1、废气收集罩；2、洗气机；3、废气处理设备；4、风机；5、排放管。1. Exhaust gas collection hood; 2. Gas scrubber; 3. Exhaust gas treatment equipment; 4. Fan; 5. Discharge pipe.

具体实施方式Detailed ways

下面对照附图，通过对实施例的描述，对本发明的具体实施方式作进一步详细的说明，目的是帮助本领域的技术人员对本发明的构思、技术方案有更完整、准确和深入的理解，并有助于其实施。The specific embodiment of the present invention will be described in further detail by describing the embodiments below with reference to the accompanying drawings, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present invention, and contribute to its implementation.

如图1和图2所示，本发明提供了一种铸造车间废气处理方法，包括如下的步骤：As shown in Figure 1 and Figure 2, the present invention provides a method for treating exhaust gas in a foundry, comprising the following steps:

S1、风机4运转，由铸造车间内的废气收集罩1汇聚废气；S1, the fan 4 is running, and the waste gas is collected by the waste gas collection cover 1 in the foundry;

S2、废气被输送至洗气机2进行处理；S2, the exhaust gas is transported to the scrubber 2 for processing;

S3、经洗气机2处理后的废气进入废气处理设备3进行处理；S3, the exhaust gas processed by the scrubber 2 enters the exhaust gas treatment equipment 3 for processing;

S4、经废气处理设备3处理后的废气由排气管5向外排放。S4. The exhaust gas treated by the exhaust gas treatment equipment 3 is discharged outward through the exhaust pipe 5 .

具体地说，如图2所示，洗气机2与废气收集罩1连接，废气处理设备3与洗气机2连接，风机4与废气处理设备3连接，排放管5与风机4连接。废气收集罩1通过废气输送管路与洗气机2的进气口连接，废气输送管路内设置百叶吸风口，洗气机2的出气口与废气处理设备3的进气口连接，废气处理设备3的出气口与风机4的进气口连接，风机4的出气口与排放管5的下端连接，排放管5为竖直设置，排放管5的上端设置排气口，处理后的废气经排放管5向外排出。废气收集罩1位于铸造车间内，废气收集罩1设置多个，各个废气收集罩1分别位于一个铸造设备的上方，铸造设备包括射芯机、铸造机、壳芯机、投料机和保温炉等，可以实现铸造车内内废气的有效收集，提高废气收集效率和收集效果。在上述步骤S1中，风机4运转后，可以产生吸力，废气收集罩1中形成气流，各个铸造设备处产生的废气汇聚至上方的废气收集罩1，由废气收集罩1进行收集。Specifically, as shown in FIG. 2 , the scrubber 2 is connected to the exhaust gas collection cover 1 , the exhaust gas treatment equipment 3 is connected to the scrubber 2 , the fan 4 is connected to the exhaust gas treatment equipment 3 , and the discharge pipe 5 is connected to the fan 4 . The exhaust gas collection cover 1 is connected to the air inlet of the scrubber 2 through the exhaust gas conveying pipeline, and the louver suction port is arranged in the exhaust gas conveying pipeline, and the gas outlet of the scrubber 2 is connected to the inlet of the exhaust gas treatment equipment 3, and the exhaust gas is treated The air outlet of the device 3 is connected to the air inlet of the fan 4, and the air outlet of the fan 4 is connected to the lower end of the discharge pipe 5, the discharge pipe 5 is vertically arranged, and the upper end of the discharge pipe 5 is provided with an exhaust port, and the waste gas after treatment is passed through The discharge pipe 5 discharges to the outside. Exhaust gas collection hood 1 is located in the foundry workshop. There are multiple exhaust gas collection hoods 1. Each exhaust gas collection hood 1 is located above a casting equipment. The casting equipment includes core shooting machines, casting machines, shell core machines, feeders and holding furnaces, etc. , can realize the effective collection of exhaust gas in the casting car, and improve the efficiency and effect of exhaust gas collection. In the above step S1, after the fan 4 is running, it can generate suction, and an air flow is formed in the exhaust gas collection hood 1, and the exhaust gas generated at each casting equipment converges to the upper exhaust gas collection hood 1, and is collected by the exhaust gas collection hood 1.

洗气机2、废气处理设备3和风机4位于铸造车间的外部，铸造车间内的废气为无机气体。在上述步骤S2中，废气首先被输送至洗气机2进行处理，洗气机2的雾化效果好，可以更有效的去除溶于水的无机气体，稀释废气浓度，降低安全隐患，酸碱中和，降低废气温度及去除粉尘和粘附物。Gas scrubber 2, waste gas treatment equipment 3 and fan 4 are located outside the foundry, and the waste gas in the foundry is inorganic gas. In the above step S2, the exhaust gas is first transported to the gas scrubber 2 for treatment. The atomization effect of the gas scrubber 2 is good, which can more effectively remove inorganic gases dissolved in water, dilute the concentration of exhaust gas, and reduce potential safety hazards. Neutralize, reduce exhaust gas temperature and remove dust and adherents.

作为优选的，废气处理设备3为光氧化废气处理设备，对废气的处理效果更好。在上述步骤S3中，从洗气机2流出的废气进入废气处理设备3中，由废气处理设备3对废气进行处理。光氧化废气处理设备采用高能C波段(仅次于切割不锈钢的激光，强于氩弧焊光源的数十倍强度)在设备内，强裂解恶臭物质分子链，改变物质结构，将高分子污染物质，裂解、氧化成为低分子无害物质，如水和二氧化碳等。光氧化废气处理设备内利用催化氧化剂进行废气催化氧化，可有效地杀灭细菌，将有毒有害物质破坏且改变成为低分子无害物质。在分解过程中产生高能高臭氧UV紫外线光束分解空气中的氧分子产生游离氧，即活性氧，因游离氧所携正负电子不平衡所以需与氧分子结合，进而产生臭氧。UV+O2→O-+O*(活性氧)O+O2→O3(臭氧)，众所周知臭氧对有机物具有极强的氧化作用，对恶臭气体及其它刺激性异味有极强的清除效果。O3也为强催化氧化剂进行废气催化氧化，裂解恶臭气体中细菌的分子键，破坏细菌的核酸(DNA)，再通过臭氧进行氧化反应，彻底达到脱臭及杀灭菌的目的。Preferably, the exhaust gas treatment equipment 3 is a photo-oxidation exhaust gas treatment equipment, which has a better treatment effect on exhaust gas. In the above step S3, the waste gas flowing out from the scrubber 2 enters the waste gas treatment equipment 3, and the waste gas is treated by the waste gas treatment equipment 3. The photo-oxidation waste gas treatment equipment adopts high-energy C-band (second only to the laser for cutting stainless steel, and tens of times stronger than the intensity of argon arc welding light source) in the equipment to strongly crack the molecular chains of odorous substances, change the material structure, and remove polymer pollutants , cracked and oxidized into low-molecular harmless substances, such as water and carbon dioxide. Photo-oxidation waste gas treatment equipment uses catalytic oxidizers to carry out catalytic oxidation of waste gas, which can effectively kill bacteria, destroy toxic and harmful substances and change them into low-molecular harmless substances. During the decomposition process, high-energy and high-ozone UV rays are generated to decompose oxygen molecules in the air to generate free oxygen, that is, active oxygen. Because the positive and negative electrons carried by free oxygen are unbalanced, they need to combine with oxygen molecules to generate ozone. UV+O 2 →O-+O* (active oxygen) O+O 2 →O 3 (ozone), it is well known that ozone has a strong oxidation effect on organic matter, and has a strong removal effect on malodorous gases and other irritating odors . O 3 is also a strong catalytic oxidant for catalytic oxidation of exhaust gas, cracking the molecular bonds of bacteria in malodorous gas, destroying the nucleic acid (DNA) of bacteria, and then performing oxidation reaction through ozone to completely achieve the purpose of deodorization and sterilization.

而且，光氧化废气处理设备占地小、质量轻，方便布置。可适应高浓度，大气量，不同恶臭气体物质的脱臭净化处理，可每天24小时连续工作，运行稳定可靠，安全性高，不会产生二次污染。Moreover, the photo-oxidation waste gas treatment equipment occupies a small area, is light in weight, and is convenient to arrange. It can adapt to the deodorization and purification treatment of high concentration, large volume, and different malodorous gas substances. It can work continuously 24 hours a day, with stable and reliable operation, high safety, and no secondary pollution.

作为优选的，废气处理设备3具有四个依次布置的光氧化处理区和一个活性炭吸附区，来自洗气机2废气依次流经四个光氧化处理区和活性炭吸附区。活性炭吸附区处设置有活性炭箱，活性炭箱布置三层，可以有效地改善设备处理能力，提高废气处理效果。Preferably, the exhaust gas treatment equipment 3 has four photooxidation treatment areas and an activated carbon adsorption area arranged in sequence, and the exhaust gas from the scrubber 2 flows through the four photooxidation treatment areas and the activated carbon adsorption area in sequence. The activated carbon adsorption area is equipped with an activated carbon box, and the activated carbon box is arranged in three layers, which can effectively improve the processing capacity of the equipment and improve the effect of waste gas treatment.

作为优选的，风机4为节能环保离心风机。风机4设置两台，两台风机4为并联设置，风机4的最大风量为130000m3/h，增大废气的收集量。风机4配套变频器，可根据铸造车间相应情况对风机4的风量进行调节，同时设备功率相应减小。Preferably, the fan 4 is an energy-saving and environment-friendly centrifugal fan. There are two fans 4, and the two fans 4 are arranged in parallel. The maximum air volume of the fans 4 is 130000m 3 /h, which increases the collection amount of waste gas. The fan 4 is equipped with a frequency converter, which can adjust the air volume of the fan 4 according to the corresponding conditions in the foundry, and at the same time reduce the power of the equipment accordingly.

如图2所示，排放管5为竖直设置，排放管5的高度为15米，确保排放达标。As shown in Figure 2, the discharge pipe 5 is vertically arranged, and the height of the discharge pipe 5 is 15 meters, so as to ensure that the discharge reaches the standard.

以上结合附图对本发明进行了示例性描述。显然，本发明具体实现并不受上述方式的限制。只要是采用了本发明的方法构思和技术方案进行的各种非实质性的改进；或未经改进，将本发明的上述构思和技术方案直接应用于其它场合的，均在本发明的保护范围之内。The present invention has been exemplarily described above with reference to the accompanying drawings. Apparently, the specific implementation of the present invention is not limited by the above methods. As long as various insubstantial improvements are made using the method concept and technical solution of the present invention; or without improvement, the above-mentioned concept and technical solution of the present invention are directly applied to other occasions, all within the protection scope of the present invention within.

Claims (5)

1.铸造车间废气处理方法，其特征在于，包括步骤：1. The waste gas treatment method in foundry, characterized in that it comprises the steps: S1、风机运转，由铸造车间内的废气收集罩汇聚废气；S1. The fan is running, and the exhaust gas is collected by the exhaust gas collection cover in the foundry; S2、废气被输送至洗气机进行处理；S2. The exhaust gas is transported to the scrubber for processing; S3、经洗气机处理后的废气进入废气处理设备进行处理；S3. The exhaust gas treated by the scrubber enters the exhaust gas treatment equipment for treatment; S4、经废气处理设备处理后的废气由排气管向外排放；S4. The exhaust gas treated by the exhaust gas treatment equipment is discharged from the exhaust pipe; 其中，废气收集罩设置多个，各个废气收集罩分别位于一个铸造设备的上方。Wherein, a plurality of exhaust gas collection covers are provided, and each exhaust gas collection cover is respectively located above a casting equipment. 2.根据权利要求1所述的铸造车间废气处理方法，其特征在于，所述废气收集罩通过废气输送管路与所述洗气机连接。2 . The method for treating waste gas in a foundry according to claim 1 , wherein the waste gas collection cover is connected to the gas scrubber through a waste gas delivery pipeline. 3 . 3.根据权利要求1或2所述的铸造车间废气处理方法，其特征在于，所述废气处理设备为光氧化废气处理设备。3. The foundry waste gas treatment method according to claim 1 or 2, characterized in that the waste gas treatment equipment is photo-oxidation waste gas treatment equipment. 4.根据权利要求3所述的铸造车间废气处理方法，其特征在于，所述废气处理设备具有四个依次布置的光氧化处理区和一个活性炭吸附区，来自所述洗气机废气依次流经四个光氧化处理区和活性炭吸附区。4. The foundry waste gas treatment method according to claim 3, wherein the waste gas treatment equipment has four sequentially arranged photooxidation treatment areas and an activated carbon adsorption area, and the waste gas from the scrubber flows through in sequence Four photo-oxidation treatment areas and activated carbon adsorption area. 5.根据权利要求1或2所述的铸造车间废气处理方法，其特征在于，所述风机为节能环保离心风机。5. The method for treating waste gas in a foundry according to claim 1 or 2, wherein the fan is an energy-saving and environment-friendly centrifugal fan.
CN202111571168.4A 2021-12-21 2021-12-21 Waste gas treatment method in foundry Pending CN116351835A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204337942U (en) * 2014-12-24 2015-05-20 萍乡市天东电器科技有限公司 Cast panel workshop filter
CN205517250U (en) * 2016-01-11 2016-08-31 重庆净空居环保科技有限公司 Casting exhaust treatment device
CN212548820U (en) * 2020-04-15 2021-02-19 太仓荣邦金属制品有限公司 High-efficient waste gas absorbing device of aluminum alloy die casting production

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN204337942U (en) * 2014-12-24 2015-05-20 萍乡市天东电器科技有限公司 Cast panel workshop filter
CN205517250U (en) * 2016-01-11 2016-08-31 重庆净空居环保科技有限公司 Casting exhaust treatment device
CN212548820U (en) * 2020-04-15 2021-02-19 太仓荣邦金属制品有限公司 High-efficient waste gas absorbing device of aluminum alloy die casting production

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