KR101066709B1 - High concentration odor gas or industrial waste disposal method and apparatus - Google Patents

Abstract

The present invention discloses a method for treating a high concentration of odor gas or an industrial waste gas and an apparatus thereof.
According to the method and apparatus for treating high concentration malodorous gas or industrial waste gas according to the present invention, the step S1 of collecting and contrasting high concentration malodorous gas or industrial waste gas to form waste gas, and the contrast treated waste gas to ultraviolet light It characterized in that it comprises a step S2 for photodegradation and S3 step for oxidizing the photolyzed waste gas by mixing with ozone, thereby removing harmful substances or odors with high efficiency, In addition, it avoids secondary environmental pollution by pollutant sources, has no special mechanical operation, makes no noise, easy maintenance, and does not require special pretreatment.

Description

The method of treating foul smell and contaminated gas and device of treating foul smell and contaminated gas}

The present invention relates to a method and apparatus for treating a high concentration of malodorous gas or industrial waste. More particularly, the present invention relates to a process for deodorizing / purifying malodorous gas or industrial waste gas such as sewage treatment, sewage lifting, waste treatment, pharmaceutical field, and chemical manufacturing. It can be used in the field of environmental protection, effective odor removal, high purification efficiency, high adaptability, high relative throughput, and a method and apparatus for treating high concentration odor gas or industrial waste gas without secondary pollution by reprocessing. will be.

Industrial waste gases and high concentrations of odors are important factors that cause environmental pollution. In particular, odors have a great adverse effect on the environment and human body.

These odors refer to all types of gases that irritate the olfactory organs, causing discomfort or harming the living environment, which is generally recognized as a typical environmental pollution.

Internationally, the control of odor has been done for a long time, and industrial countries in developed countries have adopted a lot of fixed activated carbon deodorization method.

In recent years, China has also focused on the measurement and combating of odors and enacted the odor emission standard (GB 14554-93) and the analysis method associated with it.The odor pollutants (ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan, emulsified methyl) , Dimethyl disulfide, carbon disulfide, and styrene) emissions are managed at the national level.

The intensity of the odor increases as the concentration of odor increases. According to related research data, the odor intensity exhibited by odors to humans is directly proportional to the amount of odorous substances stimulated by human smell, ie, I = K × logC + a (I: Olfactory sense of smell (odor intensity), K: constant (value according to the kind of odorous substance), C: concentration of odorous substance, a: constant (value according to the kind of odorous substance)) In this regard, it can be seen that even if the odor substance is removed by about 90%, the sense of smell of the human is sensed as if the odor concentration is reduced by less than half.

Therefore, the removal of odor is more difficult than the removal of other air pollutants, and in order to thoroughly remove the odor, it must be several tens to one thousand times more stringent than the exhaust emission standard.

In addition, currently, high concentration of odor gas purification treatment generated in the production process of the plant is mainly proceeded by direct high temperature combustion method, catalytic oxidation method, activated carbon deposition method, acid / alkaline drug injection method, bio deodorization method, etc. Large facility investment costs, high maintenance costs, low throughput for investment, unstable operation, large footprint of available equipment, low deodorization and secondary environmental pollution, etc. there is a problem.

The first technical problem to be solved by the present invention is to remove volatile organic substances (VOCs), inorganic substances, hydrogen sulfide, ammonia, mercaptan and other major pollutants and high concentration odor with high efficiency, transportation equipment by pollution-free energy source such as electric power It is possible to deodorize and purify malodorous gas or waste gas with the power of, and to provide a high concentration of malodorous gas or industrial waste gas which does not require the addition of a separate chemical to participate in chemical reaction.

The second technical problem to be solved by the present invention is to remove volatile organic substances (VOCs), inorganic substances, hydrogen sulfide, ammonia, mercaptan and other major pollutants and high concentration odor with high efficiency, and transport equipment by pollution-free energy sources such as electric power It can deodorize and purify odor gas or waste gas only with the power of. It does not require the addition of chemicals to participate in chemical reactions. It has no special mechanical operation. It makes no noise and easy maintenance. It does not require special pretreatment such as warming and humidification, and it does not require secondary pre-treatment such as waste or wastewater by pyrolysis and ozonation of toxic or toxic substances in odors or waste gases. It is to provide a processing device.

The present invention to solve the first technical problem described above,

S1 step of forming a waste gas by performing a contrast treatment to collect a high concentration of odor gas or industrial waste gas and to prepare for transport to the next step, S2 step of photodegrading the contrast treated waste gas by ultraviolet light and the photolysis treatment It provides a method for treating high concentration odor gas or industrial waste gas comprising the step S3 of oxidizing the waste gas by mixing with ozone.

According to an embodiment of the present invention, the step S21 of pre-oxidation treatment by nanometer (nano-scale) titania before or after the photolysis treatment in step S2 may be further included.

According to another embodiment of the present invention, the ultraviolet rays of step S2 may have a wavelength of 180nm to 230nm.

According to another embodiment of the present invention, the ultraviolet ray of step S2 may have an energy of 472 KJ / mol to 700 KJ / mol.

According to another embodiment of the present invention, the concentration of ozone in the oxidation treatment of step S3 may be 200ppm to 800ppm.

The present invention to solve the above second technical problem,

An ultraviolet photolysis treatment device and an ozone oxidation treatment device are connected to a pipe tube as a passage, respectively, and a program control device for controlling the operation of the ultraviolet photolysis treatment device and the ozone oxidation treatment device and transportation of waste gas mounted on the conduit. Provided is a treatment apparatus for a high concentration of odor gas or industrial waste gas, comprising a device.

According to an embodiment of the present invention, a waste gas storage hopper may be installed at a front end of the ultraviolet photolysis apparatus and may be connected to the ultraviolet photolysis apparatus and a conduit as a passage.

According to another embodiment of the present invention, the ultraviolet photolysis processing apparatus has a sealed photolysis box (box) shape, a plurality of ultraviolet emitters are disposed inside the photolysis box and waste gas on the opposite side of the photolysis box. It may be provided with an inlet portion to enter and an outlet portion to be discharged.

According to another embodiment of the present invention, the inlet and the outlet may be equipped with a plurality of titania networks (titaniumdioxide network).

According to another embodiment of the present invention, the ozone oxidation treatment apparatus includes an ozone generator and an oxidation treatment tower, an outlet of the ozone generator and an oxidation treatment tower communicate with a conduit as a passage, and the oxidation treatment tower has an oxidation treatment. The tower inlet and the oxidation treatment tower outlet may be disposed respectively.

According to another embodiment of the present invention, the ozone generator is connected to the oxidation treatment tower through a passage, and the distance between the oxidation treatment tower inlet and the oxidation treatment tower outlet is the distance between the outer walls of the oxidation treatment tower. It may be a relatively long distance.

According to another embodiment of the present invention, the program control device includes a waste gas flow sensor mounted at the front end of the ultraviolet photolysis treatment apparatus, an ozone concentration sensor mounted at the front end of the ozone oxidation treatment apparatus, and a rear end of the ozone oxidation treatment apparatus. The installed waste gas exhaust concentration sensor and the main control unit are included, and the waste gas flow rate sensor, the ozone concentration sensor and the waste gas exhaust gas concentration sensor are connected to the main control unit, respectively, and the main control unit is the ultraviolet light decomposition treatment device and ozone, respectively. It may be connected to an oxidation treatment device and a waste gas transportation device.

According to another embodiment of the present invention, the waste gas transport apparatus may be disposed at the rear end of the ozone oxidation treatment apparatus or mounted at the front end of the ultraviolet photolysis treatment apparatus.

According to another embodiment of the present invention, the waste gas transport apparatus may be a transport pump or a blower.

According to the method and apparatus for treating high concentration odor gas or industrial waste gas according to the present invention, it removes harmful substances or odors with high efficiency, is environmentally friendly, avoids secondary environmental pollution by pollutants, and there is no special mechanical operation, so there is no noise Maintenance is easy and there is no need for special pretreatment.

1 is a view schematically showing the configuration of a treatment apparatus for a high concentration of odor gas or industrial waste gas according to the present invention.
Figure 2 is a schematic diagram showing the interior of the ultraviolet photolysis treatment apparatus of the treatment apparatus of high concentration malodorous gas or industrial waste gas according to the present invention.

Hereinafter, the present invention will be described in more detail.

The method for treating a high concentration of odor gas or industrial waste gas according to the present invention and its apparatus include ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan, methyl emulsion, dimethyl disulfide, carbon disulfide, styrene, hydrogen sulfide (H ₂ S), Pyrolytic treatment of highly odorous gases such as VOCs, Benzene, Toluene and Xylene and molecular bonds that make up industrial wastes by using UV light Pyrolysis treatment breaks the intermolecular bonds to form an atmosphere on a single-molecule mixed gas in an ionic state. The ozone oxidation treatment of such mixed gas causes the single molecules in the ionic state to react with ozone to form small molecules. It is converted into carbon dioxide (CO ₂ ), water (H ₂ O) and neutral molecules. In this way, malodorous gases or industrial waste gases which are harmful to the human body or human environment can be converted into harmless neutral small molecules.

First, the method for treating a high concentration malodorous gas or industrial waste gas according to the present invention collects and contrasts a high concentration of malodorous gas or industrial waste gas to form a waste gas, and photo-decomposes the contrast treated waste gas by ultraviolet rays. S2 step and S3 step of oxidizing the photolyzed waste gas by mixing with ozone (Ozone), wherein the contrast treatment to the waste gas is to collect various odor gas or industrial waste gas in the next step in a constant amount It means to prepare the transfer to the furnace, for example, can be collected through the chimney of the industrial site or the hood of the restaurant can be prepared to be uniformly added to the next process, it is also possible to use a storage hopper.

Next, the contrast-treated waste gas is subjected to photodegradation with ultraviolet rays, wherein the ultraviolet rays may have a wavelength of 180 nm to 230 nm, more preferably 180 nm to 190 nm, and irradiation time Is preferably 0.25 seconds or less. Here, if it is less than the lower limit, there is a problem that the transmittance of ultraviolet rays is significantly lowered and the effective distance capable of actually reacting is less than 3 cm. On the contrary, if the upper limit is exceeded, the photon energy of ultraviolet rays is reduced and the waste is discarded. There is a problem that the energy required to attract the molecular rings of some of the components of the gas may be short.

In addition, when irradiated for 0.25 seconds or less, the concentration of the waste gas is set based on an atmosphere containing oxygen and nitrogen, which may be preferably 200 ppm or less and an ultraviolet output of 4200λw / cm ² . It can be set and changed according to the situation of the waste gas.

In addition, the oxidation pretreatment may be performed by nanometer titania before or after the photolysis process. The nanometer titania may be processed into titanium dioxide with a particle diameter of several tens to several hundred nm, thereby causing the malodor gas or waste gas. In order to increase the surface area in contact with, it can be realized by means such as a filter net coated with particles of such particle diameter. The titania material used here is titanium dioxide (TiO ₂ ) and is known to exhibit an effect such as deodorization by oxidation.

Next, the photo-decomposed waste gas is mixed with ozone for oxidation, and the concentration of the ozone may be 200 ppm to 800 ppm.

Here, the concentration of ozone is set on the basis of the atmosphere containing oxygen and nitrogen containing the prepared waste gas, and after the molecular ring of contaminants in the waste gas is decomposed by ultraviolet photon energy. Since it is a problem that is determined by the amount necessary to proceed the ozone and oxidative reaction, the higher the concentration of the waste gas has a relationship that the amount of ozone required increases.

Combination Binding energy ( KJ Of mol ) Combination Binding energy ( KJ Of mol ) H-H 436.2 C-H 413.6 H-C 347.9 C-F 441.2 C = C 607.0 C-N 291.2 C = C 828.8 C = N 791.2 N-N 160.7 C-0 351.6 0-0 139.0 C = 0 724.2 0 = 0 490.6 0-H 463.0

<Table 1> is the binding energy of the substances constituting the odor gas or industrial waste gas, the photon energy of ultraviolet rays used in the present invention is 472 KJ / mol to 700 KJ / mol, the bond of <Table 1> It is higher than energy, so it can break the bond.

Herein, the photon energy having a range of 472 KJ / mol to 700 KJ / mol is determined in relation to the wavelength range of 180 nm to 230 nm of ultraviolet rays. If the molecular ring binding force of the contaminant in the waste gas is within the range of this photon energy, decomposition may be possible, but decomposition may be weak. After the molecular ring of contaminants in the waste gas is decomposed, it is liberated as an ionic state atom and combines with ozone, which has a very strong oxidizing ability, to produce a new harmonic material with a simple structure or less harm. Therefore, the above-mentioned concentration of 200ppm to 800ppm of ozone can be controlled by the number of ion state atoms of the decomposed contaminants.

In addition, ozone used in the present invention may be generated by an ozone generator, which produces a ozone molecule by pyrolyzing oxygen molecules in air.

<Formula 1>

O ₂ → O ^{- +} O +

<Formula 2>

O^*+ O₂ → O₃

<Formula 1, 2> represents the mechanism of the generation of active oxygen and ozone, the ozone has an extremely strong oxidation effect on the organic material, effective to extinguish the irritating odor such as odor gas or industrial waste gas to be.

In other words, long-term molecules such as odor gas are broken by ultraviolet light having high energy, and are thermally decomposed into a single molecule in an independent ion state, and then converted into harmless molecules such as water and carbon dioxide by oxidizing ozone. .

On the other hand, the treatment apparatus of high concentration odor gas or industrial waste gas according to the present invention, the ultraviolet photolysis treatment device and the ozone oxidation treatment device are each connected to a pipe tube as a passage, the ultraviolet photolysis treatment device and the ozone oxidation treatment device It includes a program control device for controlling the operation and the waste gas transport device mounted on the conduit, Figure 1 is a schematic drawing of the configuration of a treatment apparatus of a high concentration of odor gas or industrial waste gas according to the present invention. In more detail with reference to this, the waste gas storage hopper (1), the ultraviolet photolysis processing unit (2) and the ozone oxidation treatment unit (3) connected through the conduit (10) are connected in order, which is collected and in process The use of conduits is preferred for the smooth flow and leakage prevention as the passage of waste gas. (2) and the ozone oxidation treatment device (3) is connected to a program control device (not shown, the main control unit 70, which is a component thereof) for controlling the electronic control, to the ozone oxidation treatment device (3) The waste gas transport apparatus 5 connected to the conduit 10 discharges the waste gas to the outside or the atmosphere by the waste gas discharge conduit 6 connected separately.

Here, Figure 2 is a schematic view showing the interior of the ultraviolet photolysis treatment apparatus of the treatment apparatus of high concentration malodorous gas or industrial waste in accordance with the present invention, referring to the ultraviolet photolysis treatment apparatus 2 in more detail, the ultraviolet photolysis A sealed photolysis box 20 is interpolated in the processing apparatus 2, and a plurality of ultraviolet emitters 21 are installed inside the photolysis box 20, in which a UV lamp composed of a low pressure mercury discharge tube is used. It can be seen that the UV emitter 21 can be installed in a vertically or horizontally arranged in the photolysis box 20 uniformly at regular intervals.

In addition, the opposite side of the photolysis box 20 has an inlet portion (not shown, installed on the side opposite to the outlet portion) into which the odor gas or industrial waste gas enters, and an outlet portion 22 discharged after the photolysis treatment. It can be seen that it is formed.

In addition, since the photodegradation intensity and the flow rate of the waste gas are varied due to various chemical substances constituting the odor gas or waste gas, the plurality of ultraviolet ray emitters 21 are used. At the time, the UV emitter 21 receives the control signal of a program control device linked thereto by a sensor for detecting an incoming waste gas or odor gas, thereby operating or emitting the plurality of UV emitters 21. The intensity of the emission is controlled, and the emission intensity is controlled within the range of 180 nm to 230 nm of ultraviolet light and the energy of 472 KJ / mol to 700 KJ / mol. The program control device has a data input / output port by a sensor, and can be controlled even in a control center at a place where a processing apparatus according to the present invention is installed.

In addition, it can be seen that the inlet and outlet 22 are equipped with a plurality of titania networks (titaniumdioxide network, 23), the titania network, respectively, the inlet and outlet portions on the opposite surface of the photolysis box 20 The waste gas, which is fixed at 22 and flows out, is subjected to oxidation pretreatment as described in the treatment method according to the present invention.

On the other hand, the ozone oxidation treatment apparatus 3 is connected to the ozone generator 31 and the oxidation treatment tower 32, the outlet of the ozone generator 31 and the oxidation treatment tower 32 is a conduit 8 as a passage. In communication with each other, an oxidation treatment tower inlet 32a and an oxidation treatment tower outlet 32b may be disposed in the oxidation treatment tower 32, respectively. In this case, the inlet of the ozone generator 31 is disposed in front of an element such as a filter (not shown) that directly contacts the outside atmosphere or removes a pollutant such as dust, and thus uses abundant oxygen in the atmosphere. Mechanism for converting the oxygen in the air to ozone has been described in the above <Formula 1,2> and omitted.

In addition, a transport pump 9 of a means such as a vacuum pump, a blower, or the like may be used at the front or the rear of the ozone generator 31 to smoothly supply oxygen to the atmosphere. In the apparatus, a vacuum pump, a blower, or the like may be installed in front of the apparatus for smooth supply of odor gas or waste gas.

In addition, the distance between the oxidation treatment tower inlet 32a and the oxidation treatment tower outlet 32b of the oxidation treatment tower connected to the ozone generator 31 is a relatively long distance among the outer walls of the oxidation treatment tower 32. That is, the farthest distance between two points on the outer wall of the oxidation treatment tower 32 is preferable. In this case, the treatment efficiency of the waste gas can be increased under the same conditions, and since a bad smell gas or waste gas contains a considerable amount of oxygen, In addition to the pyrolysis treatment, the ultraviolet photolysis treatment device 2 also generates ozone and is mixed with the waste gas into the oxidation treatment tower 32 so that the ozone supplied by the ozone generator 31 is only insufficient ozone. Therefore, the heat treatment and the oxidation treatment improve the efficiency.

In addition, the program control device includes a waste gas flow sensor 71 mounted on the front end conduit 10 of the ultraviolet photolysis processing apparatus 2 and an ozone concentration mounted on the front end conduit 10 of the ozone oxidation treatment apparatus 3. A sensor 72, a waste gas exhaust concentration sensor 73 and a main control unit 70 mounted on the rear end conduit 6 of the ozone oxidation treatment apparatus are included, and the waste gas flow rater 71 and the ozone concentration sensor ( 72 and the waste gas exhaust concentration sensor 73 are electrically connected to the main control unit 70, and the main control unit 70 is the ultraviolet photolysis processing unit 2 and the ozone oxidation processing unit 3, respectively. And the waste gas transport apparatus 5.

 The waste gas transport device 5 is mounted to the rear conduit 10 of the ozone oxidation treatment device 3, and may use a vacuum pump, a blower, or an air inhaler, and also a front end of the ultraviolet photolysis treatment device 2. Can be deployed.

In this case, when the waste gas transport device 5 is disposed in the rear conduit 10 of the ozone oxidation treatment device 3, the waste gas transport device 5 is disposed in the oxidation treatment tower 32, the ozone generator 31, and the conduit. Since the differential pressure is formed, the installation of a separate air transport pump in the ozone generator 31 connected to the conduit 8 can be omitted.

As described above, according to the method and apparatus for treating high concentration odor gas or industrial waste gas according to the present invention, the waste gas flow sensor 71, ozone concentration sensor 72 and The concentration and flow rate of ozone generated in the ozone generator and photolysis by the ultraviolet photolysis treatment device are controlled by a program control device interlocked with the waste gas exhaust concentration sensor 73, and the ultraviolet photolysis treatment device and the ozone oxidation treatment device. When operating the gas, the odor gas or waste gas stored in the waste gas storage hopper 1 flows into the photolysis box due to the differential pressure formed by air suction, and the oxidation pretreatment is first performed by a plurality of titania networks, Pyrolysis reaction occurs by ultraviolet rays, and ionic molecules and ozone formed at this time The ozone) stability, such as water, carbon dioxide, by the oxidation reaction of the ozone oxidation column and the gas mixture leading to the small molecule is to be converted to harmless substances discharged into the outside atmosphere.

1: waste gas storage hopper 2: UV photolysis treatment device
3: ozone oxidation treatment device 5: waste gas transportation device
6: waste gas exhaust conduit 8 conduit
10: conduit 20: photolysis box
21 ultraviolet ray emitter 31 ozone generator
32: oxidation treatment tower 70: main control unit

Claims (14)

A step S1 of collecting a high concentration of malodorous gas or an industrial waste gas and preparing a transfer to a next step to form a waste gas;
S2 step of photodecomposing the contrast-treated waste gas by ultraviolet rays having energy of 472 KJ / mol to 700 KJ / mol; And
And S3 step of oxidizing the photo-decomposed waste gas of step S2 with ozone having a concentration of 200 ppm to 800 ppm, and oxidizing the odor gas or industrial waste gas.
The method of claim 1,
And a step S21 of performing oxidation pretreatment by nanometer titania before or after the photolysis treatment in step S2.
The method according to claim 1 or 2,
Ultraviolet rays of step S2 have a wavelength of 180nm to 230nm, characterized in that the treatment of high concentration odor gas or industrial waste gas.
delete delete The ultraviolet photolysis treatment apparatus and the ozone oxidation treatment apparatus are connected to a pipe tube as a passage, respectively, and a program control device for controlling the operation of the ultraviolet photolysis treatment apparatus and the ozone oxidation treatment apparatus is provided. A waste gas transport apparatus for applying a differential pressure to the apparatus and the ozone oxidation treatment apparatus,
The ozone oxidation treatment apparatus includes an ozone generator and an oxidation treatment tower, an outlet of the ozone generator and an oxidation treatment tower communicate with a conduit as a passage, and the oxidation treatment tower inlet and the oxidation treatment tower outlet are respectively provided in the oxidation treatment tower. Placed,
The ozone generator is connected to the oxidation tower through a passage, and the distance between the oxidation tower entrance and the oxidation tower exit is a relatively long distance between the outer walls of the oxidation tower. High concentration odor gas or industrial waste disposal apparatus.
The method according to claim 6,
A waste gas storage hopper is installed at a front end of the ultraviolet photolysis processing apparatus and is connected to the ultraviolet photolysis processing apparatus through a conduit as a passage.
The method according to claim 6 or 7,
The ultraviolet photolysis processing apparatus has a sealed photolysis box (box) shape, a plurality of ultraviolet emitters are disposed inside the photolysis box, and the inlet portion and the outlet portion through which waste gas enters are disposed on the opposite surface of the photolysis box. An apparatus for treating high concentration malodorous gas or industrial waste gas, wherein an additional portion is provided.
The method of claim 8,
And a plurality of titania networks (titanium dioxide network) are installed at the inlet and the outlet.
delete delete The method according to claim 6,
The program control device includes a waste gas flow sensor mounted at the front of the ultraviolet photolysis treatment apparatus, an ozone concentration sensor mounted at the front of the ozone oxidation treatment apparatus, a waste gas exhaust concentration sensor mounted at the rear of the ozone oxidation treatment apparatus, and a main controller. The waste gas flow sensor, the ozone concentration sensor, and the waste gas exhaust concentration sensor are respectively connected to the main control unit, and the main control unit is connected to the ultraviolet photolysis treatment unit, the ozone oxidation treatment unit, and the waste gas transport unit, respectively. A high concentration odor gas or an industrial waste disposal apparatus.
The method of claim 12,
The waste gas transport apparatus is disposed at a rear end of the ozone oxidation treatment apparatus or is disposed at a front end of the ultraviolet photolysis treatment apparatus.
The method of claim 13,
The waste gas transport apparatus is a treatment pump or blower (blower), a high concentration of odor gas or industrial waste gas treatment apparatus.

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