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Fax: 0519-81169881
Mobile: Mr. Xu 13961189388
E-mail : lsd@lsdhb.cn13961189388@163.com

Address: Changzhou City Wujin District Caoqiao Industrial Park 342 provincial highway on the 9th

 

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Odor gas deodorization device

产品名称

Odor gas deodorization device

Details

A chemical cleaning deodorant technology

 
Chemical scrubber principle is mainly based on the composition of the odor using strong acid (sulfuric acid), alkali (sodium hydroxide), strong oxidant (sodium hypochlorite) as a wash spray solution and gas molecules in the gas-liquid contact, the gas phase The odor component is transferred to the liquid phase, and the odor component is neutralized by chemical agents and odor components, and oxidized or other chemical reactions. Chemical washing methods can be applied to treat odor substances including organic sulfur compounds, nitrogen compounds, organic acids, oxygenated hydrocarbons, halogenated substances and other exhaust gases. Suitable for sludge treatment, food, petroleum, chemical, pharmaceutical and other industries.
 
(1) The chemical washing equipment commonly used in washing equipment is a packed tower. The chemical absorption liquid is sprayed down from the top of the tower, the exhaust gas flows upwards, and the odorous gas is fully contacted with the absorbing liquid to be removed. Absorption fluid and exhaust flow ratio (liquid / gas ratio) is generally 1-3L / m3, packing height is generally 2-5 meters, the gas superficial velocity is generally 0.5-1 m / sec. Well-packed tower, deodorant effect can reach 90%.
 
 
(2), chemical absorbers commonly used chemical absorbers include the following:
 
(1) alkaline solution Alkaline absorption solution commonly used solution containing 1 to 10% sodium hydroxide is very effective in eliminating hydrogen sulfide, others such as methyl mercaptan, methyl sulfide, methyl disulfide, lower fatty acids often in the wastewater Disposal of the site caused by the smell of the material, this method can get very good treatment effect.
 
(2) acidic solution Acid washing is mainly used to eliminate the odor caused by ammonia, trimethylamine and other alkaline gases, the general use of sulfuric acid (0.5-5% solution) as the washing liquid.
 
(3) Sodium hypochlorite solution: Sodium hypochlorite is generally used together with an acid-base absorption solution. For other methods is difficult to eliminate the sulfur methyl, the use of sodium hypochlorite absorbent control effect is very good. Sodium hypochlorite solution (effective chlorine concentration) is about 500-2000 ppm when it is used to treat high concentration odors in sewage treatment plant, while sodium hypochlorite solution is used at about 50-500 ppm when treating lower concentration odors. In terms of the performance of various oxidants, sodium hypochlorite cheapest, the effect is not bad, so the most commonly used. The sodium hypochlorite in solution is in the form of hypochlorous acid (HOCl): NaOCl + H2O → HOCl + NaOH ... At pH 7.5, the available chlorine in the hypochlorite solution is treated with 50% HOCI and hypochlorite ( OCl -) exists. At pH = 10, only 0.3% of available chlorine is present as HOCl; at pH = 11 or 12, HOCl is almost completely dissociated into useless hypochlorite ions, so pH control is important.
 
 
 

Two biological filtration deodorant technology

 
Biofilter deodorization process using "microbial" degradation technology, the use of growth in the filter on the deodorant microorganisms on H2S, SO2, NH3 and most of the volatile organic malodor degradation, deodorant rate of up to 98% -99 %. System life of up to 10 years or more, in the outdoor -20 ℃ -40 ℃ range of work. Can run all year round, running 24 hours a day, the process does not produce secondary pollution. And the system covers an area of ​​small, save land resources. Processing system using FRP theme, good corrosion resistance.
 
The core of the biological filtration deodorization system is a high-efficiency biological filter (pond) tower, a composite packing and a dominant microbial strain that is conducive to biological attachment and growth. Under suitable environmental conditions, the microorganisms in the filter tower form a biofilm on the surface of the packing material. The inorganic and organic substances of the exhaust gas act as a carbon source and an energy source, and the living substance is maintained by degrading malodorous substances. The malodorous substances are decomposed into water , Carbon dioxide and minerals such as odorless, to purify the foul gas purposes.
 
 
 

Biodegradation process

 
1, the gas-liquid diffusion stage: the malodorous gas material is adsorbed or absorbed by microorganisms on the filler in the living body and transferred from the gas phase to the biological phase;
 
2, the liquid-solid diffusion stage: malodorous gas material and biofilter (pool) tower packing - biofilm surface water contact dissolved in water, transferred from the vapor phase to liquid water, dissolved in water, H2S is perched on the packing of biological Adsorption, transfer from the liquid phase to the biological phase;
 
3, the biological oxidation stage: biofilm formed on the surface of the biofilm microorganisms feed on malodorous gaseous matter, malodorous substances and VOCS are microbial decomposition of oxidants, the energy generated in the conversion process for my microbes to provide energy and growth and reproduction , So that the transformation of foul gas substances continued.
 
 
 

The main role of the object

 
Malodorous inorganic gases: including hydrogen sulfide, ammonia, mercaptans, thioethers and the like.
 
Non-volatile malodorous organic gases: organic benzene, toluene, chlorobenzene, lower aliphatic hydrocarbons, alcohols, aldehydes and so on.
 
VOCs: Sulfur-containing organic compounds (mercaptans and thioethers), nitrogenous compounds (amines, amides), oxygenated organic compounds (alcohols, ethers, ketones and aldehydes) and hydrocarbons (aliphatic and aromatic hydrocarbons) Creature and so on.
 
 
 

Three natural plant solution deodorant

 
The early seventies of last century, foreign countries began to extract from pure natural plant juice to eliminate odor research work, and successfully obtained from a variety of edible natural plants can eliminate different odor, many types of plants Extract. Since 1975, patented core technology - From more than 350 kinds of natural plant extracts formulated as a working fluid to eliminate odor in the air, in more than 40 countries around the world in the use of natural plant extract odor control technology to eliminate Odor-like environment, especially the odor emitted by organic matter. Its important feature is the ability to quickly eliminate odors rather than temporarily mask the stench.
 
Natural plant liquid products are purified from natural plants, non-toxic to humans and non-toxic, will not cause skin or respiratory allergies and other adverse reactions, is reliable, in line with international health standards of environmentally friendly products.
 
Natural plant extracts can be based on a variety of workplaces and public places, different sources of odor, targeted design process, remove odor, keep the air clean.
 
 
 

Composition of natural plant extracts

 
In the natural plant extract odor control technology, the working fluid used is a series of plant extracts from the compound, these plant extracts from trees, grass and flowers and other plants extracted from the smell of organic matter.
 
These organic flavors contain a large number of complex compounds, all of which are the major components of most vegetable oils and can be divided into four broad categories:
 
① terpenes: These naturally occurring compounds are the most important ingredients in vegetable oils. They all have the same empirical C10H16. For example, pinane, menthane.
 
② linear compounds: the compounds that make up this part are aldehydes, alcohols and ketones. They are present in a range of volatile vegetable oils extracted from fruits. Such as Kwai alcohol, lauryl alcohol.
 
③ Benzene Derivatives: These compounds have the same formula as the compounds derived from benzene, especially from propylbenzene. Such as acetate.
 
④ other compounds: Examples of the fourth category are vanillin, cinnamic acid and geranic acid formate working solution
 
 
 

Introduction to natural plant deodorization process principle

 
After natural plant extract deodorant equipment atomization, natural plant extract to form a mist, the radius of the liquid droplets in the space ≤ 0.04mm. Droplets have a large specific surface area, with a large surface energy. The average per mole is about a few dozen kcal. This order of magnitude energy is 1 / 3-1 / 2 of the bond energy of many elements. The surface of the solution not only can effectively adsorb the odor molecules in the air, but also can change the configuration of the odor molecules adsorbed, weaken the chemical bond in the odor molecules, and increase the instability of the odor molecules, It is easy to react with other molecules. The acid buffer in the plant fluid reacts to form an odorless and non-toxic organic salt. For example, hydrogen sulfide reacts under the action of plant liquid to generate sulfate ions and water; ammonia produces nitrogen and water under the action of plant liquid.
 
The effective molecules contained in natural plant extracts are plant-derived extracts, most of which contain multiple conjugated double bond systems and have a strong ability to provide electron pairs, thus increasing the reactivity of odor molecules.
 
Odor molecules adsorbed on the surface of the natural plant extract solution come into contact with the oxygen in the air. At this time, the odor molecule increases its reactivity due to the above two reasons and changes the reaction mechanism with oxygen, Reacts with oxygen.
 
 
 

The reaction of natural plant extract and odor molecules can be expressed as follows:

 
A. Acid-base reaction: If the plant extract contains alkaloids, it can react with acidic odor molecules such as hydrogen sulfide. Unlike the general acid-base reaction, the common base is toxic, inedible and not biodegradable. The natural plant extracts can be biodegradable, non-toxic.
 
B. Catalytic oxidation reactions: Hydrogen sulfide, as a rule, can not react with oxygen in the air. But in the natural plant extracts catalytic, with oxygen in the air can react. Take hydrogen sulfide reaction as an example:
 
R-NH2 + H2S R-NH3 + + SH-
 
R-NH2 + SH- + O2 + H2O R- NH3 + SO42- + OH-
 
R-NH3 ++ OH- R-NH2 + H2O
 
In another example, the oxidation of mercaptan in the air:
 
R-SH (air) + O2 → R-SS-R (slow)
 
R-SH (natural plant extract) + O2 → R-SS-R (fast)
 
C. Lewis acid-base reaction. In organic chemistry, molecules or groups of atoms that can absorb electron clouds are called Lewis acids. In organosulfur compounds, the outer layer of sulfur atoms has empty orbitals and can accept extraneous electron clouds. Therefore, it can be said that such organic compounds are Lewis acids . In contrast, molecules or radicals that provide an electron cloud are called Lewis bases. Generally negatively charged radicals, nitrogen-containing organic compounds belonging to Lewis base. For example, the reaction of phenyl sulfide with natural plant extracts falls into this category. Phenyl sulfide is a Lewis acid, and the nitrogen-containing compound is a Lewis base. The two can react.
 
D. Thermodynamic point of view to discuss. After atomized natural plant extract droplets, the diameter of 0.04 mm. In this case, the surface energy of the droplets has reached one-third and one-quarter of the energy of some organic compounds. In this case, the key is to ruin the odor molecules, making them unstable and easy to decompose.
 
E. Redox reaction. For example, formaldehyde is oxidative and some of the active molecules in natural plant extracts have reducibility. They can react directly.
 
Reaction with formaldehyde and ammonia: H
 
R-NH2 + HCHO R-HN2 + H-C = CO2 + H2O
 
R-NH2 + NH3 R-NH2 + N2 + H2O
 
In theory, plant fluid can eliminate any odor gas, it is the use of the following forces to play a role: 1. Van der Waals force; 2. Coupling force; 3. Chemical reaction force; 4 attractive
 
Plant liquid deodorization has the following stages: plant liquid by van der Waals forces and odor molecules, odor molecules because of chemical reaction with plant fluids and be eliminated.
 
In addition, natural plant deodorant can also eliminate chlorine and carbon dioxide, which is generated by the corona around the particles, corona generated, the gas molecules and plant liquid to be removed.
 
 
 

Natural plant liquid deodorant technology safety and superiority

 
Plant extract and the air of various odor molecules quickly decompose, and the decomposition of the products are harmless substances, such as water, oxygen, nitrogen and so on. Botanical Extract The working fluid is characterized by the rapid breakdown of odor molecules in the air, rather than cover up the odor.
 
Plant extracts are non-toxic and harmless liquid, after 40 countries and regions in the world's strict testing and approval. Unanimously agree: plant extracts safe, non-toxic, non-irritating, non-flammable, non-explosive.
 
Natural plant liquid odor control technology not only low investment, easy operation, but also wide applicability, small footprint, without change, adding structures and additional facilities. Special odor control system does not require a lot of power consumption, safe and easy to use, easy for workers to operate, only need to regularly replenish the working fluid, the entire system maintenance and operating costs low. Odor control system is not only suitable for closed indoor space, more suitable for large, very large outdoor space.
 
 
 

Advanced system technology

 
Due to the different smelly sources, the requirements for the selection, dosage and treatment of plant liquor are also different. The main factors affecting the treatment effect are: 1. Odor concentration (ppm); 2. Air flow velocity; 3. Odor solubility; 4. Odor molecular weight; 5. Odor molecular density; Structure and composition. Only through the use of the system in accordance with a variety of different conditions in order to achieve a variety of deodorant requirements.
 
Space atomization method: plant extract through a special atomization control system micronized particle size atomization in the air, atomized molecules evenly dispersed in the air, the adsorption of odor molecules in the air, and the odor molecules decomposition, Polymerization, substitution, substitution and addition and so on chemical reactions, prompting odor molecules change the original molecular structure, so that the loss of odor. The system process can not effectively control the peripheral environmental pollution caused by the spillage of malodorous gas from the stench source, and is applicable to medium-sized and concentrated stench gas sources; less investment in construction and higher operating costs.
 
Collection evaporation method: The plant extract is evaporated into a gaseous state by a special evaporator to disperse among the containers. The induced draft fan draws the malodorous gas into the container through the collecting pipe, mixes with the gaseous plant extract dispersed in the container, and then flows through the exhaust port Discharge, thus eliminating the odor. The system process can effectively control the peripheral environmental pollution caused by the spillage of malodorous gas from the stench source, and is suitable for the stench source with lower odor concentration and smaller odor; the construction investment is medium and the operating cost is relatively low.
 
Washing and filtration method: The diluted plant extract in the storage tank is sent to the shower spray in the washing container through the circulation pump, and the spray liquid is drained to the storage tank to be circulated by the circulation pump. Induced draft fan through the collection pipe will be foul gas drawn to the washing container, the smell gas through the gas distribution plate uniform after the gas flow and spray reverse into the packing layer, the gas flow through the multi-directional cutting, shunt and fully with the filler surface of the diluted Plant extract contact and reaction, the malodorous gas flow rate at this time slow, long residence time in the container, into a semi-liquid phase, the surface of the plant extract fillers to form a filter effect, the odor of the gas flows out of the filler layer is sprayed After the liquid is discharged through the exhaust port, the odor is eliminated. The system process can effectively control the peripheral environmental pollution caused by the spillage of malodorous gas from the stench source and has obvious treatment effect and is suitable for the stench gas source with higher odor concentration and larger odor; the construction investment is slightly higher and the operating cost is lower.
 
 
 

Natural plant deodorant application of the scope

 
Case proved natural plant deodorant is a very good deodorant, and its contact reaction, the odor, such as hydrogen sulfide and ammonia will be reduced by 95%, sulfur dioxide, ethanol, sulfur, methanol, sulfur content decreased by 97% , So it is widely used in deodorization of various kinds of sewage treatment plants (stations), refuse transfer stations, landfills, composting plants, sludge accumulation areas and other places as well as petroleum, chemical, synthetic rubber, pharmaceuticals, food processing , Paper and other production plant waste gas purification.
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