How to do the exhaust gas treatment in the dust free workshop?

Hello landlord, according to the questions you raised, the following will be answered in detail for you:

Dust-free workshops generally include industrial dust-free workshops and biological dust-free workshops. The main components of the exhaust gas emitted by the industrial dust-free workshop, especially the dust-free workshop of the electronics industry, are: general exhaust gas, hot waste gas, organic waste gas, acid and alkali waste gas, phosphorus-containing special waste gas, dust-containing waste gas, etc.

The composition of the exhaust gas emitted by the same industry, different products, and emissions is different, but it needs to be treated to a certain extent and can only be discharged outdoors after meeting the national emission standards.

The general exhaust gas discharged from the general living room, duty room and toilet can be directly discharged to the outside.

When the emission of organic waste gas exceeds the standard, it must be treated by organic waste gas treatment equipment to meet the standard before discharging organic waste gas, and the treatment methods include activated carbon adsorption method, liquid absorption method, etc.

If the acid and alkali waste gas is emitted more in the production process, it will be neutralized and discharged up to the standard through the wet exhaust gas absorption tower.

The exhaust heat can be discharged directly under normal circumstances, and if the temperature is high, thermal insulation measures must be taken to avoid injuring people.

Dust-containing exhaust gases must be removed by an appropriate dust removal device before being discharged into the atmosphere.

Special waste gases containing phosphorus and arsenic are first prevented from chemical reactions in the exhaust system, and are discharged up to standard after being treated by special waste gas treatment equipment. The general treatment methods include dilution method, absorption method, adsorption method, catalytic combustion method and so on.

The exhaust air of the biosafety laboratory generally contains active microorganisms such as toxic and harmful germs. Therefore, this type of exhaust air must be filtered and sterilized before being discharged. For example, the exhaust air in the operating room must be filtered with high efficiency before it can be discharged to the outside.

The exhaust air of the P3 laboratory must be filtered through an effective filter before it can be discharged to the outside.

The exhaust air in the P4 laboratory must be filtered through a two-stage high-efficiency filter before it can be discharged outside. For safety reasons, it is best to use a bag-in-bag-out high-efficiency filter device.

Hope it helps!

Different industries, different products, and the composition of the exhaust gas emitted by them are different.

Source control method.

The main reason for the generation of organic waste gas is the backward production capacity of the source process equipment. The industries with the largest exhaust emissions are coating, packaging and printing, and adhesives. These industries are also the current production capacity of relatively backward industries, enterprises should be upgraded from the entire industrial structure, water-based coatings to replace, for example, the automotive industry substitution work has been fully carried out, several major automotive industries in Beijing have completed the replacement of water-based coatings, and other places are also underway.

Strengthen link control.

Waste gas treatment is the main way to reduce VOCs leakage and fugitive emissions. For example, in industries such as petrochemicals and chemicals, a complete set of leak detection management systems is first needed to reduce VOCs emissions. At present, a lot of work has been done in this regard throughout the country, including some oil refining enterprises and large petrochemical enterprises.

The first thing to focus on in reducing VOCs emissions is the leak detection and repair LDAR technology. In solvent adaptation industries, such as paint production, ink production, etc., VOCs emissions are unavoidable due to the special properties of the production process. In these links, the first thing is to effectively collect VOCs, and if they cannot be collected, they cannot be governed, which is the premise of governance.

Article 45 of the new Air Pollution Prevention and Control Law clearly stipulates that the production and service activities that produce volatile organic compounds waste gas shall be carried out in a confined space, and the waste gas shall be collected and treated after collection.

Strengthen end-of-line governance.

The end treatment is only a phased measure, but now due to the very large stock, the enterprise cannot produce without end treatment. In many production processes involving VOCs as raw materials, VOCs emissions are inevitable, but after the discharge, they must be treated, such as oil and gas, gas stations, oil depots, terminals, etc.

Organic waste gas treatment is a requirement of enterprise environmental assessment, and the increase in demand for such process solutions will also promote the process development of the entire waste gas industry. Organic waste gas is mainly used to remove sulfides, hydrides, etc., and the direct emission of these components will cause air pollution. These exhaust gases need to go through multiple steps to achieve the effect of emission reduction.

You can consult Zhonghan-Hengersen environmental protection.

Wanchuan environmental protection workshop organic waste gas treatment methods are: UV photolysis method, activated carbon adsorption method, plasma purification method, spray method, catalytic combustion method.

Some high-temperature and high-humidity organic waste gas can be sprayed, small-scale enterprises can use UV photolysis and activated carbon adsorption, and large enterprises can use catalytic combustion.

Take the paint shop, for example.

The gas discharged from the drying chamber of electrophoresis, middle coat and top coat belongs to high-temperature and high-concentration waste gas, which is suitable for incineration treatment. At present, the coating exhaust gas treatment technical measures commonly used in the drying process are:

Regenerative Thermal Oxidation Technology (RTO), Regenerative Catalytic Combustion Technology (RCO), ** Thermal Incineration System (TNV).

Turn. 1. Condensation ** method.

The condensation method is a method of directly introducing the exhaust gas into the condenser or first adsorption and absorption, and then the analyzed concentrated exhaust gas is introduced into the condenser, and the condensate can be separated from valuable organic matter.

2. Absorption method. The absorption method can be divided into chemical absorption and physical absorption, because the organic waste gas contains a large amount of "triphenyl" gas, the chemical activity is low, and chemical absorption is generally not used.

Physical absorption is the dissolution of one or several components in the exhaust gas in the selected liquid absorbent, which should have a high affinity with the absorption components, low volatility, and should also have small volatility, and the absorption liquid is saturated and then cooled and reused.

3. Direct combustion method.

The direct combustion method is a method that uses the heat released by the combustion of auxiliary fuels such as gas or fuel oil to heat the mixed gas to a certain temperature (700 800) and stay for a certain time (seconds), so that the combustible harmful substances are decomposed into harmless substances at high temperature.

4. Thermal combustion method.

Thermal combustion refers to the process of raising the temperature of exhaust gas to the temperature of combustible pollutants and making it fully oxidized and decomposed.

5. Catalytic combustion.

Catalytic combustion is the process of completely oxidizing the harmful combustible components in the exhaust gas into carbon dioxide and water under the action of a catalyst.

6. Activated carbon adsorption method.

Activated carbon adsorption is to send the organic waste gas to the adsorption bed by the exhaust fan, and the organic waste gas is adsorbed by the activated carbon adsorbent in the adsorption bed to purify the gas, and the purified gas is discharged to the atmosphere to complete the purification process.

7. Biological law. The biological method is a process by which microorganisms take organic components as a source of carbon and energy and break them down into CO2 and H2O.

8. Plasma decomposition method.

Plasma decomposition method is an exhaust gas treatment method in which a large number of energy-carrying electrons generated by dielectric discharge bombards pollutant molecules under the action of an external electric field, triggering a series of complex physical and chemical reactions, so that pollutants can be degraded and removed.

1. The air intake of the dust-free workshop: the air inlet of the workshop has a blower, and a filter is added to the back, which generally has more than three layers of filtration, with initial effect, medium effect and high efficiency. The air entering the workshop is filtered and clean, and of course there is no dust in the workshop.

2. Circulating air system: as long as the exhaust pipe is connected to the front end of the blower, the circulating air is formed;

3. Fresh air system: add an exhaust fan to pump out the air in the workshop, and add a one-way air valve in the air outlet, only in and out.

The dust-free workshop needs positive pressure, that is, the clean air inside needs to overflow outward, under normal circumstances, if there is no unpleasant gas or toxic gas, there is generally no exhaust hole, only air intake. Of course, in areas where there are unpleasant smells or toxic gases, an exhaust machine is used.

The treatment method of workshop exhaust gas is usually selected according to the composition of the exhaust gas, the dismantling and the emission concentration. Here are some common workshop waste gas treatment equipment:

Dust collector: used to remove particles in the exhaust gas, such as dust, soot, etc.

Desulfurization equipment: used to remove sulfur dioxide in exhaust gas, common desulfurization equipment includes wet desulfurization, dry desulfurization, etc.

Denitrification equipment: used to remove nitrogen oxides in exhaust gas, common denitrification equipment includes selective quiet preparation reduction (SCR), selective non-catalytic reduction (SNCR), etc.

VOCs treatment equipment: used to remove volatile organic compounds from exhaust gas, such as adsorbents, combustion equipment, etc.

Catalytic combustion equipment: It is used to burn the harmful substances in the exhaust gas into harmless substances, such as catalytic oxidation, combustion, etc.

Biological filter: used to remove organic matter and foul odor in the exhaust gas, and the treatment is achieved through biodegradation.

It is necessary to select the appropriate waste gas treatment equipment according to the actual situation, and at the same time, attention should be paid to the use, maintenance and operation effect of the equipment.

What is the specific improvement of the dust-free workshop?

Design and decoration improvement (cleanliness improvement), or management system improvement, or dust-free workshop energy-saving improvement, or other improvements?

If it is a cleanliness improvement, the pure purification project will give you a reference:

The evaluation of the clean performance of clean clothes in the dust-free workshop needs to start from two aspects: dust-free and dust-filtering, and it is inappropriate to equate dust-free with clean.

Dust-free means that the clothing itself does not emit dust, which requires the selection of dust-free fabrics and accessories in the production and design process of clean clothing, and the possibility of dust and dust accumulation in cutting, sewing and style design of the garment. Using simple tools, you can judge whether a clean suit is dust-free in several ways:

1. Observe whether the fabric is woven with filament fibers through a microscope.

Natural fibers such as cotton and linen are staple fibers, and particulate matter is easily generated at the end of the fiber, so they cannot be used in dust-free workshops. Therefore, clean clothing must be woven with chemically synthesized filament fibers. In addition, because the fiber spun from recycled slices contains a certain proportion of ** materials, which have more impurities, which will increase the dust generation of the fabric, it cannot be used in the dust-free workshop.

It can be easily resolved with a microscope or a high-powered magnifying glass

2. Observe through a microscope whether the anti-static fibers added to the fabric will become a source of dust.

Anti-static fibers must be used in clean clothes in the clean room, and incorrect selection of anti-static fibers may cause pollution. At present, there are two common types of anti-static fibers - surface carburized anti-static fibers and composite spinning anti-static fibers. Because its conductive components are coated on the surface of the substrate, the surface carburized anti-static fiber is susceptible to washing and friction and a large amount of peeling, which increases the amount of dust generated by the fabric, and cannot be used in the dust-free workshop environment.

The composite spinning anti-static fiber is a fully mixed conductive component with a molten matrix material, and then compounded with the matrix material through a special spinneret to form a fiber, so it is wear-resistant, wash-resistant, and not easy to generate dust.

You haven't made the situation clear now, at present, you are in your own workshop, OEM for customers, the product can make customers satisfied, but the surface of the product contains dust, is that what it means?

Hello, the production process is recommended to make a clean shed, 100 grades, 1000 grades, 1000 grades, the cost is not high, easy to install, but also can be moved, disassembled.

Packaging process: It is recommended to use dust-free packaging products, because you don't know what your product is, it is not good to recommend.

Dust removal process: You can customize a set of automatic dust removal assembly line [Pengyu Purification Miss Tang] to remove dust, which can solve your above problems.

Hope it helps.

1) Your workshop can use sealing and environmental protection air conditioning to achieve primary purification 2) Before and after your products are bagged and packaged, you can use air compressed gas purging to remove dust (air compressed gas is generally filtered, you can sell better filter materials).

3) You can build a mini purification bench (of course your workpiece is in the case of the next one). The work and packaging are carried out on the mini decontamination bench.

4) Your packaging materials are best to use purified packaging materials.

A simple way to dispose of soot

Dust removal equipment is used to deal with fumes.

FiltrationDrum Dust Collector:The traditional cartridge dust collector has two cleaning methods, one is high-pressure air flow backblowing, and the other is pulse air flow injection;

Bag Collector:Bag filters are generally classified by different ash cleaning methods, including mechanical vibration bag filters, atmospheric back-blowing bag filters and pulse jet bag filters.

Stand-alone dust collector:Stand-alone dust collectors can generally be divided into several types, such as shaking type, self-controlled ash cleaning, pulse stand-alone dust collector, bag stand-alone dust collector, etc., which are suitable for dust removal in industrial dust removal places with small dust removal capacity.

Wet Dust Collector:Wet dust collectors can be divided into water storage wet dust collectors, pressurized water spray types and forced rotary spray wet desulfurization dust collectors from the structural type; From the size of energy consumption, it can be divided into low energy consumption; According to the gas-liquid contact type, it can be divided into integral and dispersed contact wet dust collectors.

Cyclone Dust Collector:As the name suggests, cyclone dust removal equipment is a dust removal equipment that uses the principle of centrifugal force generated by accelerating the rotation of gas, and separating the rotating solid dust from the gas.

Industrial smoke and dust waste gas treatment method

The usual treatment methods of dust and exhaust gas include precipitation method, filtration method and cleaning method, etc., and the corresponding purification equipment is mainly bag dust collector, filter element dust collector, spray tower, dry pre-dust removal device, etc. Different methods have different effects when dealing with dust of different particle sizes, and it is often necessary to select appropriate methods and equipment to treat dust and exhaust gas according to the particle size of dust and on-site working conditions.