The exhaust gas emitted by the textile factory should be treated with that kind of environmental pro

The textile printing and dyeing industry has always been a major polluter in China, and the amount of waste water and waste gas produced every year is very large, and the main components of the waste gas are: a large number of smoke and dust, organic compounds, printing and dyeing auxiliaries and oil. For the treatment of printing and dyeing factory waste gas treatment method is more the use of water spray treatment, but because the waste gas is difficult to dissolve in water, so the treatment effect is not very ideal, today by Lin Sen will introduce you to the printing and dyeing factory waste gas treatment method.

For the methods used in the waste gas treatment of printing and dyeing factories, it is generally through the following methods:

1. Install a secondary glass fiber filter device, and install a secondary glass fiber filter device at the air inlet of the low-temperature plasma exhaust gas purification equipment to control dust emissions.

2. The high-temperature plasma incineration treatment scheme is applicable: industrial waste gas with high VOCs content, complex composition, difficult to decompose substances, a small amount of particulate matter, oily matter, and continuous large-dose discharge.

3. High-temperature plasma incineration technology is the shaped energy discharge of high-frequency, high-voltage and high-power power supply under specific conditions. The industrial waste gas rises sharply from normal temperature to 3,000 degrees Celsius in the reactor, and under the dual action of high temperature and high electric potential, the organic pollutants are ionized and cracked instantaneously. After high-temperature plasma incineration, the organic matter in the industrial waste gas is cracked into elemental substances.

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Shandong Haowei Environmental Protection Technology ****.

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

The exhaust gas of the textile dye factory mainly comes from the dilution process of various dye products and the volatilization process of the porosity of the oil tank. Waste gas is mainly composed of particles, sulfides, nitrides, carbon monoxide, organic matter, etc., and the complexity and diversity of dyes and ink odorous gases, as well as the synthesis of dust removal, sterilization and disinfection, are also relatively complex when dealing with flue gas.

The absorption method is to select a suitable liquid absorbent to remove gaseous pollutants, such as adding acid and alkali liquids, surfactants, etc. to make absorbents into water, and absorb pollutants to obtain purification. The equipment usually used is a packed tower or a spray tower.

The adsorption method mainly uses porous adsorbent materials to adsorb pollutants in the exhaust gas, and there are many types of adsorbents. The most commonly used adsorbent in the furniture industry is activated carbon, which has the advantages of stable performance and corrosion resistance, and can be suitable for absorbing large air volume and low concentration of organic waste gas, but the disadvantage is that the adsorbent needs to be replaced regularly.

The condensation method is to condense the exhaust gas directly or by adsorption and concentration to separate the most valuable organic matter, which is mostly suitable for the treatment of high-concentration and valuable organic waste gas.

The biological method is to contact the waste gas with microorganisms, which are captured, degraded, and oxidized by microorganisms, so that the pollutants are decomposed into harmless inorganic substances. Due to the low solubility of the components in the organic waste gas in water, there is a great resistance to gas-liquid transfer, and the microbial treatment efficiency is low.

Photo-oxygen catalytic degradation technology uses the photocatalytic activity of the catalyst to oxidize and adsorb target pollutants on the surface of the catalyst, which is suitable for the treatment of low-concentration and high-volume gases. However, the photooxidative degradation products should be hydrophilic VOCs, which form secondary pollution, and the treatment efficiency needs to be improved.

The combustion method is to burn and oxidize the organic matter in the exhaust gas and completely convert it into carbon dioxide and water. The initial investment and operating costs of the combustion method are high, and it is less widely used in the furniture industry.

UV deodorization, the temperature is high to cool down, if the dust concentration is high, use a bag filter.

There are two major links in the wastewater treatment of textile mills, firstly, the textile mill has to deal with the impurities of the raw materials themselves. Secondly, some water treatment agents such as coagulants should be added during processing. There are many methods in the treatment process, but from a macro enterprise perspective, we need to compare the infrastructure footprint between the several methods, the capital cost of implementing the water quality treatment project, and whether there is a conflict between the treatment effect and the environment.

It is not simply from the perspective of economic interests, but also from the perspective of the environment. We have to judge first of all by the size of this textile factory.

Let's take a look at the analysis of small textile mills

1) Since the wastewater produced in a small treatment plant is relatively small in a day, the water quality changes greatly and changes more in one day.

2) Due to the limited floor space, the arrangement of sewage treatment works should be as small as possible within a reasonable range.

3) In the treatment of sewage, it is necessary to take into account factors such as labor, and it is best to automate.

4) It is necessary to use equipment such as aeration tanks to reduce sludge production.

The specific processes for treating wastewater in textile mills are: contact oxidation and coagulation precipitation, contact oxidation and activated carbon adsorption, delayed aeration and coagulation precipitation, delayed aeration and activated carbon adsorption. Smaller textile mills should consider using time-delayed aeration and coagulation precipitation or time-delayed aeration and activated carbon adsorption.

It has a better effect on its own processing.

Where to treat sewage? Just look for Shandong Haipuou.

The clothes we wear every day are the initial fabric from the textile factory, the textile industry uses a huge amount of water, the discharge of wastewater is also a lot, the composition of the wastewater in the textile factory is very complex, including a variety of chemical reagents, oils, salts, acids and alkalis, etc., several years with organic solvents to dye the new technology These are the reasons why the textile factory wastewater is difficult to treat. This article describes three methods of wastewater treatment in textile mills:

Textile mill wastewater treatment anaerobic hair.

The contaminant content of the wastewater in textile mills is complex and can be treated by anaerobic biological methods. The organic matter in the wastewater can be decomposed by anaerobic decomposition, acidic and alkaline fermentation in two stages, the concentration of organic matter is relatively high, and the odor is large, so pretreatment is required. Acid fermentation of wastewater can break down simple organic matter, such as CO2

NH3, etc. Alkaline fermentation of wastewater can neutralize NH3 on organic acids, and pH can decompose organic acids into CH4 and CO2.

The wastewater generated in the production process of the textile industry is first collected in the regulating tank for pretreatment, hydrolyzed and acidified in the anaerobic tank, and then adsorbed and degraded by the activated sludge of the aerobic tank, and formed into an activated sludge mixture after clarification in the sedimentation tank into the intermediate pool, and then air flotation treatment and sludge dewatering, and the clean water after air flotation treatment is discharged or reused after being filtered by sand filter, and the dewatered sludge contains a large number of fungi and can be re-invested in the sewage pool for reuse.

Regulating tank, primary anaerobic tank, secondary anaerobic tank, primary aerobic pool, primary sedimentation tank, secondary aerobic tank, secondary sedimentation tank, regulating tank are arranged in series, sewage flows slowly from each pool in turn, after hydrolysis and acidification of anaerobic pool, so that the COD (chemical oxygen demand, is an important comprehensive index of water quality monitoring) in sewage is greatly reduced, and then through the activated sludge adsorption and degradation of the aerobic pool, the organic matter is decomposed into inorganic matter, and the activated sludge mixture is formed into the intermediate tank after being clarified by the sedimentation tank. Prepare for air flotation treatment and sludge dewatering.

The air flotation dissolved air tank is equipped with an automatic control system, which can produce high-quality dissolved air water and store it in the dissolved gas clear water tank. The dissolved vapor clear water pool has a pipe extending into the air flotation clean water pool. After the dissolved air water in the dissolved vapor clear water pool is discharged into the air flotation purification pool, the bursting bubbles stir up water waves in the reaction area, and the sludge in the water quickly forms alum flowers floating on the water surface under the action of the liquid medicine, gathering in the churning water lace, and slowly drifting to the clarification area in the middle of the pool, which perfectly realizes the solid-liquid separation.

The separated sludge forms a slag layer on the water surface and is scraped away by the sludge scraper, so as to achieve the effect of sewage purification. After separation, the purified water becomes clean and transparent after being filtered by sand filtration, and can be discharged up to the standard; The separated sludge needs to be dewatered and reused.

Sludge dewatering requires the use of a dewatering dissolution dosing device and a sludge dewatering machine. The function of the dissolving dosing device is to prepare the flocculant solution and add it to the sludge, and the sludge dewatering machine is to dewater the sludge with the flocculant solution, and then reuse it. The dewatering of sludge can also rely on natural drying, but it requires manpower to spread the sludge in the drying tank to air dry, which is greatly affected by the weather, covers a large area, consumes both labor and time, and the efficiency is still very low, so it is best to use a dehydrator.

Dewatering machines can greatly improve the efficiency of sludge treatment.

The dewatered sludge contains a large amount of fungi that can be reused in the cesspool.

Flow chart of wastewater treatment in the textile industry.

One of the most obvious characteristics of the wastewater in the textile industry is that the color in the wastewater is relatively high, the amount of water is large, the composition is complex, and the sewage contains dyes, slurries, fiber impurities, heavy metal elements and other substances, which makes the sewage in the textile industry generally difficult to treat and toxic, and the wastewater problem is generally decolorized.

Textile printing and dyeing factories will produce a lot of waste gases in the process of production and processing, and human beings breathe the harmful gases of textile printing and dyeing factories for a long time and are easy to get sick, which also causes certain damage to the atmospheric environment. So what are the methods of waste gas treatment in textile printing and dyeing factories?

1. High-temperature plasma incineration technology.

This exhaust gas treatment method is the concentrated energy discharge of high-frequency, high-voltage and high-power power supply under specific conditions. The industrial waste gas rises sharply from room temperature to 3,000 degrees Celsius in the reactor, and under the dual action of high temperature and high electric potential, the organic pollutant components (VOCs) are ionized instantaneously and completely cracked.

2. UV photooxidation catalytic technology.

The waste gas treatment technology mainly uses a special high-energy high-ozone UV ultraviolet beam to irradiate odorous gas, polymer odorous compound molecular chain, under the irradiation of high-energy ultraviolet beam, degradation into low-molecular compounds, and then oxidation reaction through ozone to achieve the purpose of deodorization and sterilization.

3. Adsorption treatment method of activated carbon adsorption device.

It is mainly to use the surface physical adsorption of activated carbon to separate harmful gases from it and use it.

The composition of textile printing and dyeing production wastewater is relatively complex, containing a large number of residual dyes and additives, so the color is large, the organic matter content is high, the suspended solids are more, and contain trace toxic substances. Therefore, it is very harmful and difficult to deal with. Through years of research and practice abroad.

1. Separation of natural sedimentation and condensation sedimentation.

2. Details of condensation and buoyancy anionic polyacrylamide.

3. Filtration, adsorption and evaporation separation.

In addition to the use of polyacrylamide as a treatment agent, there is also polyaluminium chloride, which is an alkaline flocculant. Basic aluminum chloride is one of the most commonly used anionic polyacrylamide flocculants in water treatment, and is the most widely used in the treatment of printing and dyeing wastewater.

When the dosage of polyaluminum chloride is 700 900mg L, the pH value is controlled, the decolorization rate can reach 93, and the polyaluminum chloride is larger than other anionic polyacrylamide flocculants, and the sedimentation rate is fast.