Rubber tire waste gas peculiar smell decomposing agent as well as preparation method and application thereof

Abstract

The invention discloses a rubber tire waste gas peculiar smell decomposing agent as well as a preparation method and application thereof, relates to the field of peculiar smell and waste gas treatment in the rubber tire industry, and can effectively solve the problems of standard pollution and peculiar smell complaint of residents in the existing rubber tire waste gas treatment field. The rubber tire waste gas peculiar smell decomposing agent comprises the following components in percentage by mass: 2%-10% of linalool, 1%-15% of alpha-terpineol, 1%-15% of hexamethylenetetramine, 5%-30% of an auxiliary agent, 0.1%-5% of zinc pyrithione, 0.1%-3% of an antibacterial agent and the balance of water. The peculiar smell decomposing agent disclosed by the invention has an obvious treatment effect on peculiar smell gas discharged by the rubber tire industry, and can be used for treating part of VOC gas while efficiently removing peculiar smell, so that a synergistic treatment effect is achieved. The peculiar smell decomposing agent further has the following advantages that non-covering type thorough purification and peculiar smell removal are achieved; the cleaning agent is nontoxic, non-corrosive, non-irritant, safe, environment-friendly and free of secondary pollution; the preparation process is simple, the dilution ratio is high, the cost performance is high, and the operation cost is low; and the application form is flexible and the application scene is wide.

Description

Technical Field

[0001] The invention relates to the technical field of environmental waste gas treatment, and in particular to a rubber tire waste gas odor decomposer and a preparation method and application thereof. Background Art

[0002] According to relevant research, about 60% of the waste gas generated during the production of rubber products is odorous waste gas. At the same time, this type of waste gas has the characteristics of large gas production, high temperature, complex composition, but relatively low concentration, and foul odor, which causes certain harm to the health of factory employees and surrounding residents. According to surveys, although enterprises have met the emission standards for VOCs in waste gas in recent years, some odorous gases with low olfactory thresholds and obvious odors are still contained in the exhaust gas, which have not been effectively removed, resulting in an increasing number of environmental complaints.

[0003] At present, the technologies used in the market for the treatment of odor from rubber tire exhaust gas mainly include masking, adsorption, combustion, microbial degradation, spraying, plasma photochemical method, etc. Masking is a physical masking method. By adding a large amount of fragrance to cover the odor, people can temporarily not smell the odor, but the fragrance and odor will eventually separate, and the odor is not fundamentally removed; the adsorption method has the problem of decreased adsorption efficiency over time, and the adsorbent regeneration energy consumption is high, and there is secondary pollution; although the combustion method has high treatment efficiency, the investment cost and operating cost are high; the microbial method equipment occupies a large area, the investment cost is high, and the treatment effect is greatly affected by the activity of microbial strains; the traditional spray method adopts water washing / alkali washing / acid washing and other methods, which can only treat the gas components that are easily soluble in water / acidic / alkaline in the exhaust gas, and the gas-liquid mass transfer efficiency is low, the treatment components are relatively single, and the absorption efficiency is low; although the plasma photochemical method has a low operating cost, it has a low purification efficiency, a large number of intermediate by-products, a complex reaction mechanism, and the presence of secondary pollutants such as O3.

[0004] Therefore, developing a stable, efficient, thorough purification, low-cost, non-toxic, harmless, and secondary pollution-free odor removal technology suitable for the treatment of odorous exhaust gas in the rubber tire industry is an important issue to solve the current problems of "standard pollution" of exhaust gas in the rubber tire industry and frequent complaints from residents. Summary of the invention

[0005] In order to solve the related technical defects and problems mentioned in the above background technology, the present invention aims to provide a rubber tire exhaust odor decomposer, which can be used for the treatment of complex exhaust gas conditions in the rubber tire industry, and has the advantages of non-masking and thorough purification and removal of odor, simple preparation process, low investment and operating cost, non-toxic, non-corrosive, non-irritating, safe and environmentally friendly, and no secondary pollution.

[0006] Another object of the present invention is to provide a method for preparing a rubber tire waste gas odor decomposer.

[0007] Another object of the present invention is to provide an application of a rubber tire waste gas odor decomposer.

[0008] To achieve the above object, the present invention adopts the following technical solution:

[0009] The invention provides a rubber tire waste gas odor decomposer. The raw materials, calculated by mass percentage, include 2% to 10% of linalool, 1% to 15% of a-terpineol, 1% to 15% of hexamethylenetetramine, 5% to 30% of an auxiliary agent, 0.1% to 5% of zinc pyrithione, 0.1% to 3% of an antibacterial agent, and the remainder is water.

[0010] Preferably, the auxiliary agent is selected from one or more of dipropylene glycol methyl ether acetate, tripropylene glycol methyl ether, and 3-methyl-3-methoxy-1-butanol.

[0011] Preferably, the antibacterial agent is selected from one or more of 1,2-benzisothiazolin-3-one, benzalkonium chloride and cinnamaldehyde.

[0012] Preferably, the pH of the prepared solution is about 6 to 8, and the pH of the solution is close to neutral when diluted for use.

[0013] The present invention also provides a method for preparing the above-mentioned rubber tire waste gas odor decomposer, comprising the following process steps:

[0014] Step 1: weigh corresponding mass parts of auxiliary agents and add them into a reaction kettle, heat and stir; then weigh corresponding mass parts of linalool, a-terpineol and zinc pyrithione and add them thereto, continue heating and stirring;

[0015] Step 2: Add corresponding mass fractions of hexamethylenetetramine to the reaction kettle of step 1, and then add half volume of water in the formula, heat to a certain temperature and stir;

[0016] Step 3: Weigh the corresponding amount of antibacterial agent, slowly drip it into the solution prepared in the above step 2, keep the temperature constant and stir for a certain period of time;

[0017] Step 4: Weigh half the volume of water remaining in the formula, slowly add it to the solution in step 3 above, keep the temperature constant, and stir for a certain period of time;

[0018] Step 5: Stop stirring and heating, and cool the solution in step 4 to room temperature.

[0019] Preferably, the stirring speed is 300-2000 r / min, the heating and temperature-raising temperature ranges are both 35° C.-70° C., and the stirring time is 20-60 min.

[0020] The present invention also provides the use of the above-mentioned rubber tire waste gas odor decomposer. Specifically, the odor decomposer is used in combination with a spray tower and a high-pressure atomization device; the odor decomposer can be used for deodorization reaction in the exhaust pipe / collection duct of the mixing workshop and the vulcanization workshop, and can also be directly used for spray deodorization in unorganized areas such as rubber tire enterprise factories, production workshops, and warehouses.

[0021] Preferably, the odor decomposer can be diluted 2000 to 5000 times before use.

[0022] Compared with the prior art, the beneficial effects of the present invention are mainly:

[0023] 1. The present invention is different from the conventional masking deodorization technology principle. The odor decomposer adopts a series of complex reaction mechanisms such as rapid adsorption and encapsulation, bonding, coordination, neutralization, and redox reaction to ultimately convert odor molecules into odorless and harmless substances.

[0024] 2. The linalool and a-terpineol in the present invention play a synergistic role. Both contain alcohol hydroxyl groups and carbon-carbon double bonds in their molecules, and can react with sulfur-containing and nitrogen-containing odor molecules in the exhaust gas through free radical polymerization and nucleophilic addition, thereby quickly eliminating the odor.

[0025] 3. The copper zinc pyrithione component of the present invention can form an odorless complex with the odor molecules in the exhaust gas through the thioketone active group, thereby reducing the concentration of the odor molecules in the gas phase; at the same time, the active Zn 2+ The points can react with the reducing odor molecules to form odorless molecules, completely eliminating the odor.

[0026] 4. The hexamethylenetetramine in the present invention is a weakly alkaline compound having a quaternary amine structure, and can achieve the purpose of removing odor by reacting with acidic odor molecules through acid-base neutralization reaction or forming thiocarbamate, reacting with alkaline odor molecules such as ammonia to form hexamethylenetetramine derivatives, etc.

[0027] 5. The additives used in the present invention, such as dipropylene glycol methyl ether acetate, tripropylene glycol methyl ether, 3-methyl-3-methoxy-1-butanol, etc., have good amphiphilic properties, which help the odor decomposer to fully contact and react with the odor molecules and increase the mass transfer effect of the contact surface. At the same time, the additives are all biodegradable substances and are green and environmentally friendly.

[0028] 6. The odor decomposer of the present invention can be diluted up to 5000 times, which is much higher than conventional products on the market (the maximum dilution ratio of conventional products is 1000 times), with low operating costs and high cost performance. After the solution is diluted, the pH is neutral, non-corrosive, safer and more environmentally friendly.

[0029] 7. Experimental tests have shown that the odor decomposer of the present invention has obvious treatment effects on typical odorous gases emitted by the rubber tire industry (such as hydrogen sulfide, ammonia, carbon disulfide, styrene and other components with low odor thresholds and difficult to handle). While efficiently removing odors, it can also treat some VOC components (such as toluene, xylene, ethylbenzene, etc.), achieving a synergistic control effect.

[0030] In summary, the rubber tire exhaust odor decomposer provided by the present invention can be used for the treatment of complex exhaust gas conditions in the rubber tire industry. It has the advantages of non-masking and thorough purification and removal of odor, simple preparation process, low investment and operating cost, non-toxic, non-corrosive, non-irritating, safe and environmentally friendly, and no secondary pollution. It can not only efficiently remove odor but also treat some VOC components, achieving a synergistic governance effect. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. The specific embodiments are as follows:

[0032] Example 1

[0033] This embodiment provides a rubber tire exhaust odor decomposer, the composition and mass ratio of each component are: linalool 5%, a-terpineol 15%, hexamethylenetetramine 10%, auxiliary agent 20%, pyrithione zinc 1%, antibacterial agent 0.1%, and the rest is water. The auxiliary agent is dipropylene glycol methyl ether acetate, and the antibacterial agent is 1,2-benzisothiazolin-3-one.

[0034] The preparation steps are as follows:

[0035] Step 1: Add 20% of dipropylene glycol methyl ether acetate to the reactor and heat the reactor to keep the temperature at about 50°C; weigh 5% of linalool, 15% of a-terpineol, and 1% of zinc pyrithione into the reactor, and start stirring at a speed of 1000 r / min for 30 minutes until the solution is evenly mixed;

[0036] Step 2: Add 10% hexamethylenetetramine to the reaction kettle of step 1, and then add half the volume of water in the formula, raise the temperature to 60°C, start stirring, the stirring speed is 1500r / min, and the stirring time is 20min;

[0037] Step 3: Weigh 0.1% of 1,2-benzisothiazolin-3-one and slowly drip it into the solution prepared in the above step 2, keep the temperature at 60°C, stir at a speed of 500r / min, and stir for 30min;

[0038] Step 4: Weigh half the volume of water remaining in the formula and slowly add it to the solution in step 3 above, keeping the temperature at 60°C, stirring at a speed of 1200 r / min and stirring for 30 min.

[0039] Step 5: Stop stirring and heating, and cool the solution in step 4 to room temperature.

[0040] Example 2

[0041] This embodiment provides a rubber tire exhaust odor decomposer, the composition and mass ratio of each component are: 2% linalool, 10% a-terpineol, 6% hexamethylenetetramine, 25% auxiliary agent, 3% zinc pyrithione, 1.5% antibacterial agent, and the rest is water. The auxiliary agent is tripropylene glycol methyl ether, and the antibacterial agent is benzalkonium chloride.

[0042] The preparation steps are the same as in Example 1.

[0043] Example 3

[0044] This embodiment provides a rubber tire exhaust odor decomposer, the composition and mass ratio of each component are: linalool 8%, a-terpineol 2%, hexamethylenetetramine 15%, auxiliary agent 30%, pyrithione zinc 5%, antibacterial agent 1%, and the rest is water. The auxiliary agent is 3-methyl-3-methoxy-1-butanol, and the antibacterial agent is cinnamaldehyde.

[0045] The preparation steps are the same as in Example 1.

[0046] The rubber tire exhaust odor decomposers prepared in Examples 1 to 3 were respectively tested for the treatment effect of rubber tire exhaust odor, and the main odor gas components (hydrogen sulfide, ammonia, carbon disulfide, styrene) and typical VOC components (toluene, xylene, ethylbenzene) in the rubber tire industry exhaust were selected for effect testing. The test method is as follows:

[0047] Measuring gas: hydrogen sulfide, ammonia, carbon disulfide, styrene, toluene, xylene, ethylbenzene and other standard gases;

[0048] Gas volume: 8000m 3 / h;

[0049] Gas flow rate: 12-15 m / s;

[0050] Dilution gas: clean compressed air;

[0051] High-pressure atomizing spray equipment: When the odorous gas passes through the box, it reacts with the atomized odor polymer decomposer;

[0052] Odor decomposer dilution multiple: 5000 times;

[0053] Odor intensity of odorous gas intake: ~5000 dimensionless;

[0054] VOC intake air concentration: ~100mg / m 3 ;

[0055] Odor intensity detection instrument: Use Japan's new universe portable odor intensity detector to detect the intensity of imported and exported odorous gases;

[0056] VOC concentration detection instrument: domestic portable FID detection equipment is used to detect the inlet and outlet VOC gas concentration.

[0057] The standard gases of different odor substances are diluted to prepare odor gas sources of different concentrations. The odor polymer decomposer is diluted 5000 times and then atomized into micron-sized molecules by high-pressure atomization equipment. When the odor gas flows through the high-pressure atomization spray equipment, a series of purification reactions occur with the micron-sized odor polymer decomposer. By real-time detection of the odor intensity and VOC concentration data at the inlet and outlet of the high-pressure spray equipment, the odor treatment effect is shown in Table 1, and the VOC treatment effect is shown in Table 2:

[0058] Table 1

[0059]

[0060]

[0061] It can be seen from the test data in Table 1 that the rubber tire waste gas odor decomposers prepared in Examples 1 to 3 of the present invention have obvious odor removal effects on hydrogen sulfide, ammonia, carbon disulfide, and styrene, the main odor components in the rubber tire industry. When the inlet concentration is ~5000 dimensionless, the outlet is <200 dimensionless; the treatment efficiency of hydrogen sulfide, ammonia, carbon disulfide, and styrene is all above 90%, among which Example 3 is a relatively preferred embodiment of the present invention and has the best treatment effect on odorous gases in the rubber tire industry.

[0062] Table 2

[0063]

[0064] It can be seen from the test data in Table 2 that the rubber tire exhaust odor decomposers prepared in Examples 1 to 3 of the present invention also have a certain treatment effect on the main VOC components of toluene, xylene and ethylbenzene in the rubber tire industry, forming a synergistic effect with the odor treatment. VOC inlet concentration ~100mg / m 3When the odor decomposers of rubber tire waste gas prepared in Examples 1 to 3 of the present invention have a treatment efficiency of about 24.4% to 39.8% for toluene, xylene and ethylbenzene; similarly, Example 3 is a relatively preferred embodiment of the present invention, and has the best synergistic treatment effect on VOC gases in the rubber tire industry.

[0065] The above is a preferred embodiment of the present invention, but the present invention should not be limited to the contents disclosed in the embodiment. Therefore, any equivalent or modification completed without departing from the spirit disclosed in the present invention shall fall within the scope of protection of the present invention.

Claims

1. A rubber tire exhaust odor decomposer, characterized in that: The rubber tire waste gas odor decomposer comprises, by mass percentage, 2% to 10% of linalool, 1% to 15% of a-terpineol, 1% to 15% of hexamethylenetetramine, 5% to 30% of an auxiliary agent, 0.1% to 5% of zinc pyrithione, 0.1% to 3% of an antibacterial agent, and the remainder is water.

2. The rubber tire exhaust odor decomposer according to claim 1, characterized in that: The auxiliary agent is selected from one or more of dipropylene glycol methyl ether acetate, tripropylene glycol methyl ether, and 3-methyl-3-methoxy-1-butanol.

3. The rubber tire exhaust odor decomposer according to claim 1, characterized in that: The antibacterial agent is selected from one or more of 1,2-benzisothiazolin-3-one, benzalkonium chloride and cinnamaldehyde.

4. The rubber tire exhaust odor decomposer according to claim 1, characterized in that: Its pH is 6-8, and the pH of the solution is close to neutral when diluted.

5. The method for preparing the rubber tire exhaust odor decomposer according to any one of claims 1 to 4, characterized in that: The process steps include: Step 1: weigh corresponding mass parts of auxiliary agents and add them into a reaction kettle, heat and stir; then weigh corresponding mass parts of linalool, a-terpineol and zinc pyrithione and add them thereto, continue heating and stirring; Step 2: Add corresponding mass fractions of hexamethylenetetramine to the reaction kettle of step 1, and then add half volume of water in the formula, heat to a certain temperature and stir; Step 3: Weigh the corresponding amount of antibacterial agent, slowly drip it into the solution prepared in the above step 2, keep the temperature constant and stir for a certain period of time; Step 4: Weigh half the volume of water remaining in the formula, slowly add it to the solution in step 3 above, keep the temperature constant, and stir for a certain period of time; Step 5: Stop stirring and heating, and cool the solution in step 4 to room temperature.

6. The method for preparing the rubber tire exhaust odor decomposer according to claim 5, characterized in that: The stirring speed is 300-2000 r / min, the heating and temperature-raising temperature ranges are both 35° C.-70° C., and the stirring time is 20-60 min.

7. The use of the rubber tire exhaust odor decomposer according to any one of claims 1 to 4, characterized in that: The odor decomposer is used in combination with a spray tower and high-pressure atomization equipment; the odor decomposer can be used for odor removal reactions in exhaust gas exhaust pipes / collection ducts in mixing workshops and vulcanization workshops, and can also be directly used for spray odor removal in unorganized areas such as rubber tire enterprise factories, production workshops, and warehouses.

8. The use of the rubber tire exhaust odor decomposer according to claim 7, characterized in that: The odor decomposer can be diluted 2000 to 5000 times before use.

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