Deodorizing composite oxidant

Abstract

The invention relates to a deodorizing composite oxidant, which mainly comprises the following components in percentage by mass: 15 to 40 percent of oxidant component, 20 to 50 percent of stabilizer component, 30 to 80 percent of filler component and 0.5 to 5 percent of surfactant component. The deodorizing composite oxidizing agent is wide in raw material source, low in cost, simple to prepare, low in cost and capable of eliminating malodorous odor in waste gas of most industrial industries and waste gas of environmental sanitation industries.

Description

Technical Field

[0001] The present invention relates to a prepared composite chemical, in particular to a deodorizing composite oxidant. Background Art

[0002] In many industrial waste gas treatment industries, waste gas and odor treatment has always been an environmental problem that needs to be solved urgently. These waste gases often contain a variety of odorous substances, such as hydrogen sulfide, ammonia, aldehydes, phenols, ketones and various heterocyclic compounds, which pose a threat to the surrounding environment and human health. In the field of sanitation, facing the large amount of complex odorous gases released during the fermentation process of domestic waste, the current deodorization technology seems to be incapable of coping with it. These gases not only pose a major hidden danger to the environment and public health, but also because of their diverse types and complex composition, traditional deodorization methods cannot meet the needs in terms of removal efficiency and durability.

[0003] At present, the main waste gas odor treatment processes in these industries include spray tower spraying, activated carbon adsorption, and masking agent masking. These deodorization processes cannot eliminate odorous gases. Spray water or activated carbon as adsorption carriers will be saturated, and after adsorption saturation, they will become hazardous waste; masking agents cannot eliminate odors and cannot fundamentally reduce the concentration of odors.

[0004] Therefore, there is an urgent need to develop a new type of deodorant that can quickly and efficiently remove various malodorous substances, has good adaptability, can be used in different industrial scenarios and sanitation fields, and has environmentally friendly and harmless characteristics, so as to achieve economical and efficient waste gas treatment and odor control, and meet increasingly stringent environmental protection standards and the public's growing demand for environmental quality. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a deodorizing composite oxidant that can remove the odor of industrial waste gas or the odor caused by microbial fermentation in the sanitation industry. The deodorizing composite oxidant has a wide and cheap raw material source, is simple to prepare, and has a low cost. It can eliminate the odor in most industrial waste gas and sanitation industry waste gas.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a deodorizing composite oxidant, comprising an oxidant component, a stabilizer component, a filler component, and a surfactant component, wherein the mass content of each component is 15-50% of the oxidant, 20-50% of the stabilizer, 15-80% of the filler, and 0.5-5% of the surfactant;

[0007] Furthermore, the oxidant is one or more of sodium hypochlorite, calcium hypochlorite, sodium dichloroisocyanurate, trichloroisocyanuric acid, sodium perchlorate, potassium chlorate, sodium percarbonate, sodium persulfate, and potassium permanganate.

[0008] Furthermore, the stabilizer component is a compound with weak alkalinity or a solution thereof with pH buffering effect, including one or more of dipotassium hydrogen phosphate, potassium dihydrogen phosphate, trisodium phosphate, sodium carbonate, sodium bicarbonate, sodium acetate, sodium bisulfate, citric acid, and sodium citrate.

[0009] Furthermore, the filler component is a material that does not antagonize the function of the deodorizing composite oxidant and has a certain chemical inertness, including one or more of bentonite, modified bentonite, clay, calcium carbonate, calcium sulfate, magnesium stearate, sodium stearate, sodium chloride, sodium sulfate, and aluminum oxide powder.

[0010] Furthermore, the surfactant includes one or more of sodium dodecyl sulfate, sodium dodecyl sulfonate, sodium dodecylbenzene sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate, sodium lauroyl glutamate, distearate, and sodium fatty alcohol polyoxyethylene ether sulfate.

[0011] The preparation method is as follows: firstly, the raw material powders are sieved to remove the agglomerated large particles, added to the mixer in proportion and mixed evenly, and the mixed powders are quantitatively packed into bags and vacuumed for storage. Alternatively, the mixed powders are pressed into pills by an automatic tablet press, and then packed into packaging bags and sealed for storage.

[0012] Technical principle of the present invention:

[0013] 1. One or more oxidants are selected to use their strong oxidizing properties to oxidize and decompose malodorous substances into odorless or low-odor products, thereby achieving a direct deodorizing effect;

[0014] 2. By using strong oxidants to kill microorganisms, the growth of microorganisms in industrial waste gas treatment systems can be inhibited, or the growth of microorganisms in the sanitation industry can be inhibited to reduce the odor caused by the decomposition of organic matter such as garbage, thereby achieving an indirect long-term deodorization effect;

[0015] 3. The stability of the oxidant can be improved by using the weak alkalinity or pH buffering characteristics of the stabilizer. The chemical stability of strong oxidants will decrease in an acidic environment, and their oxidizability will generally decrease in a strong alkaline environment. The aqueous solutions of stabilizers such as dipotassium hydrogen phosphate, trisodium phosphate, sodium carbonate, sodium bicarbonate, sodium acetate, etc. have a certain alkalinity; for example, the pH buffer solution composed of potassium dihydrogen phosphate and dipotassium hydrogen phosphate can resist the drastic pH changes caused by the acidic or alkaline components introduced by the external environment during the storage or operation of the oxidant, thereby extending the shelf life and working life of the deodorizing composite oxidant.

[0016] 4. The introduction of fillers can not only provide the necessary volume for the deodorant composite oxidant ingredients to make practical tablets, but also give the composite oxidant tablets the required mechanical properties, such as good fluidity and compressibility, to ensure the uniformity and structural stability of the composite oxidant during the manufacturing process. In addition, fillers can also serve as stabilizers to help prevent physical or chemical changes in the finished deodorant composite oxidant ingredients during storage and transportation, thereby extending the shelf life of the product. In addition, fillers can also serve as anti-adhesive agents to prevent adhesion between product ingredients, ensure fluidity and stability during production and packaging, and facilitate tableting production of products.

[0017] 5. In the treatment of malodorous waste gas, the addition of surfactants can reduce the surface tension of the liquid and improve the gas-liquid contact efficiency, help form smaller droplets to increase the gas-liquid contact surface area, and thus improve the absorption efficiency of pollutants. It can also improve the absorption efficiency by enhancing the mixing effect of insoluble pollutants and absorption liquid, while reducing scaling and clogging of nozzles, helping to maintain the normal operation of equipment and reduce the consumption of chemicals.

[0018] The invention is particularly suitable for treating malodorous waste gas generated in the breeding industry, the sanitation industry and sewage treatment, and has an excellent deodorizing effect on sulfide, ammonia nitrogen and other malodorous substances in the waste gas. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with the embodiments

[0020] Example 1

[0021] The deodorizing composite oxidant of the present embodiment comprises an oxidant, a stabilizer, a filler, and a surfactant, wherein the mass content of the components is 48% of the oxidant, 32% of the stabilizer, 16% of the filler, and 4% of the surfactant; wherein the oxidant is selected from industrial grade sodium hypochlorite and sodium percarbonate in a mass ratio of 1:2, the stabilizer is selected from industrial grade sodium carbonate and sodium bicarbonate in a mass ratio of 1:2, the filler is selected from industrial grade sodium chloride and magnesium stearate in a mass ratio of 1:0.01, and the surfactant is selected from industrial grade sodium dodecylbenzene sulfonate.

[0022] Preparation method: First, sieve the raw materials to remove the large particles of agglomerated raw materials, and then put the obtained raw material powders into a mixer in the proportion of 48% oxidant, 32% stabilizer, 16% filler and 4% surfactant to mix evenly, and then put the mixed powder into an automatic tablet press to press into tablets weighing about 1 gram each, and then pack and seal the tablets to obtain the deodorant composite oxidant product.

[0023] The above tablets were placed in the water tank of the spray tower for waste gas odor treatment at the enterprise sewage treatment station at a mass ratio of 1:1000, and fully stirred and dissolved for about 10 minutes. The odor of the waste gas at the outlet of the spray tower basically disappeared. VOC, odor concentration, hydrogen sulfide, ammonia and other indicators were greatly improved.

[0024] Example 2

[0025] The deodorizing composite oxidant of the present embodiment comprises an oxidant, a stabilizer, a filler, and a surfactant, wherein the mass content of the components is 42% of the oxidant, 32% of the stabilizer, 24% of the filler, and 2% of the surfactant; wherein the oxidant is selected from industrial grade potassium chlorate and sodium hypochlorite in a mass ratio of 1:1, the stabilizer is selected from industrial grade sodium carbonate, sodium bicarbonate, and sodium bisulfate in a mass ratio of 2:4:1, the filler is selected from industrial grade sodium sulfate and sodium stearate in a mass ratio of 1:0.02, and the surfactant is selected from industrial grade sodium dodecyl sulfonate.

[0026] Preparation method: First, sieve all the raw materials to remove the agglomerated large particles, and then put the obtained raw material powders into a mixer in the proportion of 42% oxidant, 32% stabilizer, 24% filler and 2% surfactant to mix evenly, and then put the mixed powder into an automatic tablet press to press into tablets weighing about 1 gram each, and pack and seal the tablets to obtain the finished deodorant composite oxidant. Dissolve the above tablets in water in a mass ratio of 1:200, fully stir and dissolve for about 5 minutes to obtain a composite oxidant solution.

[0027] The above solution was sprayed at 1m 3 / 10ml gas-liquid ratio is sprayed in the enterprise's waste gas treatment pipeline, and various indicators such as VOC, odor concentration, hydrogen sulfide, and ammonia are greatly improved.

[0028] Example 3

[0029] The deodorizing composite oxidant of the present embodiment comprises an oxidant, a stabilizer, a filler and a surfactant, wherein the mass content of the components is 30% of the oxidant, 34% of the stabilizer, 34% of the filler and 2% of the surfactant; wherein the oxidant is selected from industrial grade potassium permanganate and sodium hypochlorite in a mass ratio of 1:3, the stabilizer is selected from industrial grade sodium carbonate and sodium bicarbonate in a mass ratio of 1:2, the filler is selected from industrial grade potassium chloride, and the surfactant is selected from industrial grade sodium dodecyl sulfonate.

[0030] Preparation method: First, sieve all the raw materials to remove the large particles of the agglomerated raw materials, and then put the obtained raw material powders into a mixer in the proportion of 30% oxidant, 34% stabilizer, 34% filler and 2% surfactant to mix evenly, and then pack and seal the mixed powder to obtain the deodorant composite oxidant product.

[0031] Dissolve the above powder in water at a mass ratio of 1:200, fully stir and dissolve for about 1 minute to obtain a composite oxidant solution. Spray the solution directly on the garbage station or on top of domestic garbage. After about 1 minute, the odor disappears, and various indicators such as hydrogen sulfide and ammonia are greatly improved.

[0032] The above powder can also be dissolved in water at a ratio of 1:2000 to obtain a suitable oxidant solution, and the solution can be sprinkled in a garbage station or other odor pollution sources, or on the landfill leachate. After about 1 minute, the odor will disappear, malodorous substances such as hydrogen sulfide and ammonia will be reduced, and the landfill leachate will become clear and the odor will disappear.

[0033] Example 4

[0034] The deodorizing composite oxidant of the present embodiment comprises an oxidant, a stabilizer, a filler and a surfactant, wherein the mass content of the components is 48% of the oxidant, 20% of the stabilizer, 48% of the filler and 2% of the surfactant; wherein the oxidant is selected from industrial grade potassium permanganate and calcium hypochlorite in a mass ratio of 1:1, the stabilizer is selected from industrial grade potassium dihydrogen phosphate and dipotassium hydrogen phosphate in a mass ratio of 1:1, the filler is selected from industrial grade potassium chloride, and the surfactant is selected from industrial grade sodium dodecyl sulfate.

[0035] Preparation method: First, sieve all the raw materials to remove the large particles of the agglomerated raw materials, and then put the obtained raw material powders into a mixer in the proportion of 48% oxidant, 20% stabilizer, 2% filler and 2% surfactant to mix evenly, and then pack and seal the mixed powder to obtain the deodorant composite oxidant product.

[0036] For stubborn odor pollution sources, such as sludge with odor produced by filter presses in wastewater treatment plants; fermented and rotten kitchen waste or other rotten materials, sprinkle the powder of this product evenly on the sludge or other odorous solids, stir slightly and sprinkle the powder evenly again. Repeat this process 3 times. The odor will disappear in about 3 minutes, and the deodorizing effect can last for a long time.

Claims

1. A deodorizing composite oxidant, characterized in that: The invention comprises an oxidant component, a stabilizer component, a filler component and a surfactant component, wherein the mass content of the components is 15-40% of the oxidant, 20-50% of the stabilizer, 30-80% of the filler and 0.5-5% of the surfactant.

2. The deodorizing composite oxidant according to claim 1, characterized in that: The oxidant is one or more of sodium hypochlorite, calcium hypochlorite, sodium dichloroisocyanurate, trichloroisocyanuric acid, sodium perchlorate, potassium chlorate, sodium percarbonate, sodium persulfate, and potassium permanganate.

3. The deodorizing composite oxidant according to claim 1, characterized in that: The stabilizer component is a compound with weak alkalinity or a compound whose solution has a pH buffering effect.

4. The deodorizing composite oxidant according to claim 3, characterized in that: The compound having weak alkalinity or whose solution has pH buffering effect is one or more of dipotassium hydrogen phosphate, potassium dihydrogen phosphate, trisodium phosphate, sodium carbonate, sodium bicarbonate, sodium acetate, sodium bisulfate, citric acid, and sodium citrate.

5. The deodorizing composite oxidant according to claim 1, characterized in that: The filler component is a material that does not antagonize the function of the deodorizing composite oxidant and has a certain chemical inertness.

6. The deodorizing composite oxidant according to claim 5, characterized in that: The material which does not antagonize the function of the deodorizing composite oxidant and has certain chemical inertness is one or more of bentonite, modified bentonite, clay, calcium carbonate, calcium sulfate, magnesium stearate, sodium stearate, sodium chloride, sodium sulfate, and alumina powder.

7. The deodorizing composite oxidant according to claim 1, characterized in that: The surfactant is one or more of sodium dodecyl sulfate, sodium dodecyl sulfonate, sodium dodecylbenzene sulfonate, sodium fatty alcohol polyoxyethylene ether sulfate, sodium lauroyl glutamate, distearate, and sodium fatty alcohol polyoxyethylene ether sulfate.