KR101009339B1 - Deodorizing apparatus including pretreatment device in the biofilter way - Google Patents

Abstract

PURPOSE: A bio-filter type deodorization apparatus including a pre-processing unit is provided to effectively remove alkaline bad smell and acidic bad smell, and to reduce the chemical shock of microorganisms in a ceramic media. CONSTITUTION: A bio-filter type deodorization apparatus(100) comprises the following: a blowing fan(110) blowing bad smell gas into the deodorization apparatus; a first filter unit(120a) passing the bad smell gas through a polyurethane foam layer(121a) and a pall ring layer(122a); a pre-processing unit(120) formed with a second filter unit(120b); an acidic water supply tank(130a) supplying acidic water to the first filter unit; an alkaline water supply tank(130b) supplying alkaline water to the second filter unit; a main body(140) including a porous ceramic media layer(141), and a limestone layer(142); a processing water storage tank(150); a discharging unit(160) discharging purified gas after passing through a demister(162) and a steam separator; and a controller(170).

Description

Deodorizing apparatus including pretreatment device in the biofilter way

The present invention includes a chemical liquid cleaning pretreatment deodorizer at the front end of the biofilter deodorizer, and by neutralizing and removing the high concentration of acid and alkaline odor components contained in the collected odor gas, the microorganisms grown in the deodorizer are optimized. The present invention relates to a biofilter-type deodorizer which enables to grow in the environment.

Odors that occur in sewage treatment plants, pig farms, livestock wastewater treatment plants, slaughterhouses, food plants, and various chemical plants vary greatly in the composition of pollutants depending on the source or source of occurrence. Volatile organic compounds (VOCs) or volatile sulfur compounds including sulfur compounds, nitrogen compounds such as ammonia and amines, benzene, toluene, ethylbenzene, xylene, and the like.

The odor components are generally converted to water and carbon dioxide to be removed, and the odor gas treatment technologies currently used are largely physical and chemical deodorization methods such as activated carbon adsorption, chemical cleaning, ozone oxidation, and combustion deodorization, and soil microorganisms. There are biological deodorization methods such as treatment method, activated sludge method and bio filter.

These methods are selected according to the treatment environment to remove the odor gas, and may be used alone or in combination of two or more. The physical and chemical deodorization method has problems of operating costs such as chemicals, material costs, etc., the biological deodorization method Has a disadvantage of requiring a lot of land area and high power loss due to high pressure loss.

Accordingly, in recent years, the interest in the method for deodorizing the filled microorganism using the microorganism carrier having high deodorization efficiency can be operated in a small space of the biological deodorizing method.

Carrier-filled microorganism deodorization method is a method of introducing and removing malodorous gas into a packed column filled with a carrier to which microorganisms are immobilized. do. That is, odor components are decomposed and removed by the cultured microorganisms.

Biological methods using the microorganisms as described above have been mainly used for general wastewater and wastewater treatment, but recently, it has been applied to the field of removing odor and its utility is increasing.

These technologies in the air sector focus on the microorganisms immobilized on the carrier at high concentration so that they can be cultured and grown stably. These microorganisms require water and nutrient supply for growth and proliferation, and in particular, biological odors. In the case of the deodorizing device, it is important to prevent the microorganisms growing on the carrier from being subjected to chemical shock due to the rapid change in the odor gas.

As an example of the chemical shock, the sudden change in the hydrogen ion index (pH) inhibits the decomposition efficiency of the odor component of the microorganisms, causes the death of the microorganisms, and continuously accelerates the change in the hydrogen ion index by virtue of deterioration of the deodorizing device performance Cause.

When hydrogen sulfide (H ₂ S), which is an incoming sulfur-based odor component, is 30 ppm or more, sulfuric acid (H ₂ SO ₄ ) is produced by reacting with oxygen and water, and when high concentration of hydrogen sulfide of 50 ppm or more is introduced, it passes through a carrier where microorganisms are fixed and grown. When the microorganisms of the carrier are dead due to high acidity, the deodorizing function is stopped until the microorganisms are reinoculated.

In addition, the introduced ammonia (NH ₃ ) reacts with water to form ammonium hydroxide (NH ₄ OH), which is alkaline, and is converted to hydroxylamine (NH ₂ OH) by microorganisms, indicating strong bases in water. The pH of the deodorizer is changed according to the concentration of ammonia, which adversely affects the growth environment of microorganisms.

Therefore, it is very important to maintain the growth environment condition of microorganisms in order to remove the odor component by biological deodorization method, and precisely adjust the temperature, humidity, hydrogen ion index and nutrient supply which are operating conditions of microorganism deodorizer There is a need for the development of a precision operating system.

The problem to be solved by the present invention is a method for biological deodorization of malodorous gas, so that the acid alkali component introduced into the deodorizer can be efficiently pretreated to remove the malodorous component under optimum environmental conditions. To provide a deodorization device that can be.

In order to achieve the above object, the present invention, the blowing fan 110 for sucking the odor gas and blowing into the deodorizing device 100; The first filter unit 120a, the polling layer 122b, and the polyurethane foam layer 121b passing through the polyurethane foam layer 121a and the polling layer 122a by passing the odor gas from the blowing fan 110 in a downward flow. Pre-processing unit 120 consisting of a second filter unit (120b) passing in an upward flow; An acidic water supply tank 130a into which an acidic chemical is introduced and circulated and supplied with acidic water whose hydrogen ion index is controlled to the first filter part 120a; An alkaline water supply tank 130b into which an alkaline chemical is introduced and alkaline water whose hydrogen ion index is controlled is circulated and supplied to the second filter part 120b; A main body 140 having a porous ceramic carrier layer 141 and a limestone layer 142 in which malodor gas is introduced from the pretreatment unit 120 and the microorganisms are fixed and grown; A treated water storage tank 150 in which nutrients and microorganisms are introduced and the treated water whose hydrogen ion index is controlled is circulated and supplied to the main body 140; The discharge unit 160 is discharged to the atmosphere after passing through the built-in separator 161 and the demister 162, the clean gas in which the odor component of the odor gas is removed from the main body 140; And a control unit 170 for receiving the detected signal and transmitting a control signal according to the input set value to optimize the microbial growth environment of the porous ceramic carrier layer 141. To provide.

At this time, it is preferable that the polyurethane foam layers 121a and 121b have a structure in which a polyurethane foam is laminated and a member cut and processed into a cube shape having a size of 3 to 5 × 3 to 5 × 1 to 2 cm is laminated.

In addition, the first filter unit 120a is an acidic water injector 123a for spraying the acidic water supplied from the acidic water supply tank 130a on the upper side, and is installed below the acidic water injector 123a, and the blowing fan Odor gas flowing from the 110 and the acidic water injected from the acidic water injector (123a) is installed in contact with the polyurethane foam layer 121a, the polyurethane foam layer (121a) lower portion passes through and passes through the polyurethane foam layer (121a) It is preferably composed of a polluting layer 122a through which the odor gas and the acidic water pass downward, and an acidic water retention tank 124a disposed under the polling layer 122a and having the odor gas and the acidic water passing through the polling layer 122a. Do.

In addition, the second filter unit 120b is an alkaline water retention tank 124b in which the odor gas introduced from the first filter unit 120a and the alkaline water injected through the alkaline water injector 123b are retained, and the alkaline water retention is performed. Polling layer 122b positioned above the tank 124b, and the odor gas flowing from the alkaline water retention tank 124b passes upwards and the alkaline water injected through the alkaline water injector 123b passes downward to contact each other in countercurrent, the polling. The polyurethane foam layer 121b which is installed in contact with the top of the layer 122b and passes through the polling layer 122b, passes upward, and the alkaline water injected through the alkaline water injector 123b passes downward to contact each other in countercurrent. It is preferable that the space is installed on the polyurethane foam layer 121b and is composed of an alkaline water injector 123b for injecting alkaline water supplied from the alkaline water supply tank 130b. .

In addition, the main body 140, the upper portion of one side of the wall surface is connected to the upper portion of the wall surface side of the second filter portion 120b of the pretreatment unit 120 so as to flow to each other, the treatment water injector for spraying the treatment water on the upper portion 143, a porous ceramic carrier layer 141 spaced apart from the treated water injector 143 and a growth space of microorganisms, a limestone layer 142 and a limestone layer contacted to the lower portion of the porous ceramic carrier layer 141. (142) It is preferable that the treatment water retention tank 144 located below.

In addition, the carrier embedded in the porous ceramic carrier layer 141 is preferably composed of a component containing silica, alumina and iron oxide.

In addition, the discharge unit 160 is in contact with the separator separator 161 is arranged in a zigzag form of the plate, the grating plate-shaped demister 162 and the top of the demister 162 is installed in contact with the top of the separator 161. It is preferable that the discharge pipe 163 is installed, and detects a pressure drop in the pretreatment unit 120 and the main body 140 between the odor gas inlet of the pretreatment unit 120 and the discharge pipe 163. More preferably, a differential pressure gauge 164 for transmitting to 170 is provided.

The biofilter type deodorizing device having a pretreatment unit according to the present invention distinguishes odor gas from alkaline odor and acid odor in the pretreatment unit before the microorganism decomposes and removes the odor component. Since neutralization and removal are carried out, acidic odor and alkaline odor components can be removed efficiently compared to the scale of the pretreatment unit.

In addition, as the acid alkali component is sufficiently pretreated and removed, the chemical impact and load of the microorganisms growing on the ceramic carrier layer are reduced, so that the activity of the microorganisms is maintained at the highest level and the survival rate is improved. It can reduce the operating cost.

1 is a schematic configuration diagram of a biofilter type deodorizer according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

However, the following examples are only for illustrating the present invention, and the present invention is not limited by the following examples, and may be changed to other embodiments equivalent to substitutions and equivalents without departing from the technical spirit of the present invention. Will be apparent to those of ordinary skill in the art.

1, a biofilter type deodorizer having a pretreatment unit according to an embodiment of the present invention is indicated by the reference numeral 100.

The biofilter type deodorizer 100 includes: a blowing fan 110 for sucking odor gas and blowing air into the biofilter type deodorizer 100; Alkali component of the malodorous gas while the malodorous gas passes downward through the polyurethane foam layer 121a and the polling layer 122a in order to pretreat the malodorous gas introduced from the blower fan 110 before being decomposed and removed by microorganisms. The first filter unit 120a, which is neutralized by being in contact with the acidic water in a cocurrent flow, and the odor gas introduced from the first filter unit 120a sequentially form the polling layer 122b and the polyurethane foam layer 121b. A pretreatment unit 120 including a second filter unit 120b in which an acid component of the odor gas is neutralized by contacting with alkaline water in a countercurrent flow while passing upwardly; Acidic water supply tank 130a for supplying the acidic water from the first filter unit (120a) of the pretreatment unit 120 is supplied to the first filter unit (120a) after the hydrogen ion index is adjusted; Alkaline water supply tank 130b for supplying the alkaline water from the second filter unit 120b of the pretreatment unit 120 and supplying it to the second filter unit 120b after the hydrogen ion index is adjusted; The malodorous gas is decomposed by the microorganism whose growth environment is controlled by the treated water while the malodorous gas pretreated in the pretreatment unit 120 flows in order to sequentially pass through the porous ceramic carrier layer 141 and the limestone layer 142. Body 140 to be removed; Treated water storage tank 150 for supplying the treated water from the main body 140 to supply the treated water adjusted to the appropriate composition for the microorganism of the main body 140 to the main body 140; The clean gas in which the malodorous component of the malodorous gas is removed from the main body 140 is introduced into the water, and the water particles (mist) contained in the clean gas are sequentially passed through the separator 161 and the demister 162 sequentially. A discharge unit 160 which is collected and discharged to the atmosphere; And a controller 170 which receives the hydrogen ion index, temperature, water level and differential pressure signals of the deodorizer 100 and transmits a control signal according to the input set value to the operating device to optimize the growth environment of the microorganisms of the carrier layer 141. );

The inlet 111 of the blower fan 110 is connected to the inlet pipe (L1), which is a passage that is introduced into the deodorizing device 100 of the present invention by collecting the odor gas from the outside and the outlet 112 is one end of the pretreatment unit ( It is connected to the other end of the malodorous gas inlet pipe L2 connected to the upper space of the polyurethane foam layer 121a of the 1st filter part 120a of 120 so that circulation is possible.

The pretreatment unit 120 neutralizes an acid component of the malodorous gas introduced from the first filter unit 120a and the first filter unit 120a to neutralize the alkali component of the malodorous gas introduced from the blowing fan 110. It consists of a second filter unit 120b.

The first filter unit 120a is provided with an acidic water injector 123a for injecting the acidic water supplied from the acidic water supply tank 130a at an upper portion thereof, and is spaced apart from the acidic water injector 123a, and the odor gas inlet pipe is disposed. It is installed at a position lower than (L2) and the polyurethane foam layer 121a through which the odor gas flowing from the blowing fan 110 and the acidic water injected from the acidic water injector 123a pass downward, and the polyurethane foam layer 121a lower portion The odor gas and the acidic water passing through the polling layer 122a are disposed under the polling layer 122a and the polling layer 122a passing through the polyurethane foam layer 121a and the acidic water passing downward. It includes an acidic water retention tank 124a.

The second filter part 120b includes an alkaline water retention tank 124b in which the malodorous gas introduced from the first filter part 120a and the alkaline water injected through the alkaline water injector 123b remain, and the alkaline water retention tank ( The polling layer 122b located above and the polling layer 122b in which the odor gas flowing from the alkaline water retention tank 124b passes upward and the alkaline water injected through the alkaline water injector 123b passes downward to contact each other in countercurrent. 122b) Polyurethane foam layer 121b and the polyurethane, which are installed in contact with the upper portion, and the odor gas passing through the polling layer 122b pass upwards and the alkaline water injected through the alkaline water injector 123b passes downward to contact each other in countercurrent. An alkaline water injector 123b spaced above the foam layer 121b and spraying alkaline water supplied from the alkaline water supply tank 130b is included.

The polyurethane foam layers 121a and 121b have a structure in which a member cut and processed into a hexahedron shape having a size of 3 to 5 x 3 to 5 x 1 to 2 cm (width × length × height) by foaming polyurethane is laminated. Its high porosity and large contact area maximize the contact of odor gas with acidic and alkaline water.

The polling layers 122a and 122b are formed by stacking a plurality of pall rings to a certain height, and also increase the contact efficiency between the malodorous gas and the acidic / alkali water. Any product that is chemically resistant is not restricted for use.

One end of the inlet 132 of the acidic water supply tank 130a is connected to the acidic water retention tank 124a of the first filter part 120a so that the inflow port 132 is interposed therebetween. It is connected to the other end of the acidic water inlet pipe L3.

A pair of submersible pumps 131 are installed in the acidic water supply tank 130a, and one end of the discharge portion of the submersible pump 131 is distributed with the acidic water injector 123a of the first filter part 120a. It is connected to the other end of the acidic water supply line L4 which is connected so that it is possible, and the interruption | blocking valve V2 and the backflow prevention valve V3 are interposed.

In addition, the acidic water supply tank (130a) has a hydrogen ion index detector (133) for detecting the hydrogen ion index (pH) of the acidic water, a temperature sensor (134) for detecting the temperature of the acidic water, detects the water level of the acidic water The water level detector 135 is installed to transmit the signals detected by the controller 170 to the controller 170, and receives the signal from the controller 170 according to the signal of the temperature sensor 134 among the signals of the controller 170. The heater 136 for controlling the temperature of the acidic water is provided.

In addition, one end of the wall surface of the acidic water supply tank 130a is connected to a water supply source (not shown) so as to be circulated, and the other end of the water supply pipe L5 in which a shutoff valve V4 is interposed. The float valve V5 connected is provided to automatically replenish the water when the level of the acidic water supply tank 130a is lowered.

In addition, one end of the acidic water supply tank 130a is connected to a drain port (not shown) so as to be circulated to the other side of the acidic water supply tank 130a and the drainage automatic valve V6 is interposed therebetween. The outlet 137 connected to the other end is installed to discharge the acidic water to the drain according to the control signal of the controller 170 when the level of the acidic water supply tank 130a is increased or the quality of the acidic water is deteriorated. .

In addition, the other side of the wall surface of the acid water supply tank 130a is provided with a overflow outlet 138, the overflow outlet 138 is one end downstream of the automatic drain valve (V6) on the acid water discharge pipe (L6) It is connected to the other end of the overflow pipe (L7) that is connected to the circulation so that, if the level of the acidic water supply tank 130a is excessively high, the acidic water is discharged to the drain through the overflow pipe (L7).

In addition, the acidic water supply tank (130a) is provided with a chemical injection device (not shown) that can input the required chemicals depending on the composition of the odor gas flowing into.

The alkaline water supply tank 130b may be supplied with the necessary chemicals according to the composition of the malodorous gas introduced into and introduced from the alkaline water retention tank 124b of the second filter unit 120b. A function of supplying alkaline water to the alkaline water injector 123b is performed, and the structure of the alkaline water supply tank 130b is the same as the acidic water supply tank 130a described above, and thus repeated description thereof will be omitted.

The main body 140 having an upper portion of one side of the wall surface connected to the upper portion of the second surface of the second filter unit 120b of the pretreatment unit 120 so as to be circulated with each other may include a treatment water injector 143 for spraying the treatment water on the upper portion. The porous ceramic support layer 141 and the porous ceramic carrier layer 141 which are spaced apart from the treated water injector 143 and are spaces for growing microorganisms to decompose and remove odor gas introduced from the second filter part 120b. Installed under the limestone layer 142 and the limestone layer 142 for removing ammonia and hydrogen sulfide remaining in the odor gas and passing through the porous ceramic carrier layer 141 and the limestone layer 142. The treatment gas retention tank 144, in which the odor gas is purified, and the treatment water injected through the treatment water injector 143 stays therein.

The carrier embedded in the porous ceramic carrier layer 141 provides a space for the growth of microorganisms, mainly components such as silica (SiO ₂ ), alumina (Al ₂ O ₃ ), iron oxide (Fe ₂ O ₃ ) It consists of.

The inlet 152 of the treated water storage tank 150 has one end thereof connected to the treated water holding tank 144 so as to be circulated and the middle of the treated water inlet pipe L8 having the check valve V7 interposed therebetween. It is connected to the other end.

A pair of submersible pumps 151 are installed in the treated water storage tank 150, and one end of the submerged pump 151 is connected to the treated water injector 143 so as to be circulated, and a shut-off valve is disposed on the way. (8) and the other end of the treated water supply pipe (L9) with the non-return valve (V9) interposed therebetween.

In addition, the treated water storage tank 150 has a hydrogen ion index sensor 153 for detecting the hydrogen ion index of the treated water, a temperature sensor 154 for detecting the temperature of the treated water, a water level sensor for detecting the water level of the treated water 155 is installed to transmit the signals sensed by them to the controller 170, and receives the signal of the controller 170 according to the temperature sensor 154 of the signals of the controller 170 to the temperature of the treated water It is provided with a heater 156 to adjust.

The other end of the water supply pipe L10 having one end connected to a water supply source (not shown) and being circulated in the middle of the wall surface of the treated water storage tank 150 and having a shutoff valve V10 interposed therebetween. When the float valve V11 connected is installed and the water level of the treated water storage tank 150 is lowered, water is automatically replenished.

In addition, one end of the treated water storage tank 150 is connected to a drain port (not shown) so as to be circulated to the other side of the treated water storage tank 150, and the drained automatic valve V12 is interposed therebetween. The outlet 157 connected to the other end is installed so that the treated water is discharged to the drain according to the control signal of the controller 170 when the level of the treated water storage tank 150 is increased or the quality of the treated water is deteriorated. .

In addition, the other side of the wall surface of the treated water storage tank 150, the overflow outlet 158 is provided, one end of the overflow outlet 158 downstream of the automatic drain valve (V12) on the treated water discharge pipe (L11) It is connected to the other end of the overflow pipe (L12) that is connected to the circulation so as to flow, and when the water level of the treated water storage tank 150 is excessively high, the treated water is discharged to the drain through the overflow pipe (L12).

In addition, the treatment water storage tank 150 is provided with a chemical input device and a microbial input device (not shown) capable of injecting necessary drugs and nutrients according to the microbial state of the carrier layer 141.

The discharge unit 160 is a clean gas of the treatment water retention tank 144 of the main body 140 is introduced into a plate (zig) arranged in a zigzag form to separate the mist (mist) contained in the clean gas first Separator 161, the demister 162 in the form of a grid plate (secondary grid) to separate the fine mist (mist) that is installed in contact with the top of the separator 161 and not separated from the separator 161 and the And a discharge pipe 163 contacting the upper part of the demister 162 and discharging the clean gas from which the mist is removed from the demister 162 to the outside.

In addition, a differential pressure gauge 164 is installed between the discharge pipe 163 and the odor gas inlet pipe L2 to sense a pressure drop in the pretreatment unit 120 and the main body 140 and transmit the pressure drop to the control unit 170. .

The control unit 170 receives the detection signals transmitted from all the detectors of the biofilter type deodorizing device 100 and displays them on the screen installed in the control unit 170 and displays the control signals according to the input setting values of each operating device. By transmitting to the biofilter-type deodorizer 100 is automatically operated.

The biofilter type deodorizer 100 of the present invention configured as described above is operated as follows.

First, by analyzing the malodorous gas to be treated to select the microorganisms suitable for the physical properties of the malodorous gas and set the optimum operating temperature, humidity, hydrogen ion index and nutrients accordingly accordingly, the set value is input to the controller 170.

Next, a signal sensed by the hydrogen ion index detector 133, the temperature sensor 134, and the water level detector 135 of the acidic water supply tank 130a is transmitted to the controller 170, and the set value of the controller 170 is set. The controlled signal is transmitted to the heater 136 and the automatic drain valve V6 to adjust the temperature and the water level of the acidic water in the acidic water supply tank 130a.

In addition, the detected hydrogen ion index is displayed on the screen of the control unit 170 and compared with the set value to input the necessary chemicals, ammonia (NH ₃ ) contained in the odor gas reacts with water and ammonium hydroxide (NH ₄ OH) Since it is produced and becomes alkaline, acidic chemicals such as sulfuric acid or hydrochloric acid are introduced into the acidic water supply tank 130a through a chemical input device to control the hydrogen ion index.

The drug injection can be used both by manual injection or automatic injection device by the operator, it is a well-known technology that can be easily carried out by those skilled in the art having ordinary skill in the art, the present invention specific illustration And description is omitted.

The acidic water of the acidic water supply tank 130a is pumped by the submersible pump 131 and sprayed from the acidic water injector 123a of the first filter part 120a through the acidic water supply pipe L4 and then polyurethane. The foam layer 121a and the polling layer 122a penetrate downward and are collected in the acidic water retention tank 124a and then circulated back to the acidic water supply tank 130a through the acidic water inlet pipe L3.

Operation of the alkaline water supply tank 130b is also the same as the acidic water supply tank 130a, but hydrogen sulfide (H ₂ S), a sulfur-based malodorous component contained in the odor gas, reacts with oxygen and water to form sulfuric acid (H ₂ S). ₂ SO ₄ ) is produced and acidic, so that alkaline chemicals such as sodium hydroxide (NaOH) or sodium hypochlorite (NaClO) are introduced into the alkaline water supply tank 130b through a chemical input device to control the hydrogen ion index. .

Alkaline water of the alkaline water supply tank 130b is pumped by an underwater pump and sprayed from the alkaline water injector 123b of the second filter part 120b through a supply pipe, and then the polyurethane foam layer 121b and the polling layer 122b are sprayed. It penetrates downward and collects in the alkaline water holding tank 124b and then circulates back to the alkaline water supply tank 130b through the inlet pipe.

The treated water of the treated water storage tank 150 includes an underwater pump 151, a treated water supply pipe L9, a treated water sprayer 143, a porous ceramic carrier layer 141, a limestone layer 142, and a treated water retention tank. 144, the treatment water inlet pipe L8 and the treatment water storage tank 150 are sequentially circulated, and the operation and control method thereof is the same as in the acidic water supply tank 130a, and thus repeated description thereof will be omitted. .

Microorganisms are introduced into the porous ceramic carrier layer 141 by inserting the microorganisms into the treated water storage tank 150 through a microorganism input device so as to fix and grow the microorganisms, and circulating the treated water through the carrier layer 141. Attached, the microorganisms lost during operation of the deodorizer 100 is replenished by the amount of loss.

In addition, in order to control the hydrogen ion index of the microorganisms fixed and grown on the carrier layer 141 and to supply nutrients, the medicine or nutrients may be introduced into the treated water storage tank 150 through a chemical input device, which is a person skilled in the art Since it is a well-known technique that can be easily implemented, the detailed illustration and description thereof will be omitted.

Odor gas introduced into the blowing fan 110 through the inlet pipe L1 is passed through the odor gas inlet pipe L2 by the blowing fan 110 to the upper portion of the first filter unit 120a of the pretreatment unit 120. Transferred.

The malodorous gas introduced into the upper portion of the first filter part 120a is in direct contact with the acidic water sprayed through the acidic water injector 123a while descending through the polyurethane foam layer 121a and the polling layer 122a. Then, the acidic water retention tank 124a collects, and the ammonia contained in the odor gas reacts with water to produce alkaline ammonium hydroxide while contacting the acidic water. It is neutralized by reacting with acidic chemicals.

The odor gas of the acidic water retention tank 124a is introduced into the alkaline water retention tank 124b of the second filter part 120b and ascends through the polling layer 122b and the polyurethane foam layer 121b. 123b) is contacted in countercurrent with the alkaline water sprayed, and the hydrogen sulfide contained in the odor gas reacts with oxygen and water to produce acidic sulfuric acid. The sulfuric acid is mixed with alkaline chemicals such as sodium hydroxide or sodium hypochlorite in alkaline water. React and neutralize.

As described above, while the malodorous gas descends the first filter unit 120a of the pretreatment unit 120, the ammonia component which is lighter than the air is reacted with water of acidic water and converted into ammonium hydroxide which is lighter than water. Ammonium hydroxide is neutralized by reaction with acidic chemicals in acidic water.

That is, the light components of ammonia and ammonium hydroxide, which are light components, have a tendency to rise, and the odor gas has a falling flow in the first filter part 120a. It stays for a long time in the polyurethane foam layer 121a and the polling layer 122a of one filter part 120a.

On the other hand, the hydrogen sulfide and sulfuric acid, which are heavy components of water and malodorous gas generated by neutralization of the ammonium hydroxide with acidic water, are intended to descend, and thus, the first filter unit 120a is briefly connected with the descending flow of the malodorous gas. Will pass.

Therefore, while the malodorous gas passes through the first filter unit 120a, the ammonia and ammonium hydroxide of the malodorous gas stay for a long time to be in sufficient contact with the acidic water, and the remaining components pass for a short time, so the scale of the first filter unit 120a is reduced. Compared with this, the processing efficiency is increased.

In addition, while the malodorous gas ascends the second filter portion 120b of the pretreatment unit 120, the hydrogen sulfide component, which is a malodorous gas component that is heavier than air, is converted into sulfuric acid which is heavier than water by reacting with water of oxygen and alkaline water. It is neutralized by reacting with alkaline water of alkaline water.

That is, hydrogen sulfide and sulfuric acid, which are heavy components of the malodorous gas, have a property of descending, and the malodorous gas has an upward flow in the second filter part 120b. It stays in the polling layer 122a and the polyurethane foam layer 121a of the filter part 120b for a long time.

On the other hand, the odorous gas from which the hydrogen sulfide and sulfuric acid, which are heavy components of the odorous gas, are removed is light and exhibits a tendency to rise, so that the gas flows through the second filter part 120b for a short time.

Therefore, hydrogen sulfide and sulfuric acid of the malodorous gas stays in contact with alkali water for a long time while the malodorous gas passes through the second filter portion 120b, and the remaining malodorous gas passes for a short time, so the scale of the second filter portion 120b is reduced. In comparison, the processing efficiency is increased.

The malodorous gas from which the acidic and alkaline malodorous components have been removed from the pretreatment unit 120 is introduced into the main body 140 and fixed and grown on the carrier layer 141 while passing downward through the porous ceramic carrier layer 141. Microorganisms decompose bad odors into water and carbon dioxide.

Hydrogen ion index and temperature in the treated water storage tank 150, the growth environment of the microorganism is optimally controlled by the treated water supplemented with nutrients and microorganisms, remaining in the gas passing through the carrier layer 141 Ammonia and hydrogen sulfide are collected in the limestone layer 142 and removed.

As described above, the biofilter type deodorizer 100 of the present invention divides the malodorous gas into three stages of the first filter unit 120a, the second filter unit 120b, and the main body 140 of the pretreatment unit 120. In addition, the acidic water, the alkaline water, and the treated water sprayed onto the first filter part 120a, the second filter part 120b, and the main body 140 are also supplied and circulated from a separate supply device, so as to match the odor gas components. Precise operation of the deodorizer 100 is possible by adjusting the composition.

The clean gas from which the malodorous component of the malodorous gas has been removed while passing through the carrier layer 141 and the limestone layer 142 is passed through the treated water retention tank 144 to the separator 161 and the demister of the discharge unit 160. After passing through the 162 and the discharge pipe 163 in order to remove the mist contained in the clean gas is discharged to the atmosphere.

When the differential pressure of the differential pressure gauge 164 provided between the discharge pipe 163 and the odor gas inlet pipe L2 increases, the flow rate of the odor gas introduced through the blower fan 110 is reduced or the blower fan 110 is increased. To stop and stop the operation of the deodorizing device 100 if excessive differential pressure persists to perform an internal inspection to promote safe operation of the deodorizing device 100.

The biofilter type deodorizer 100 of the present invention configured as described above distinguishes the malodorous gas from the alkaline odor and the acidic odor, and the malodorous gas is odor in a downward (first filter portion) and upward (second filter portion) flow section. Since neutralization and removal are performed in accordance with the physical properties of the component, it is possible to efficiently remove acidic and alkaline odor components compared to the scale of the pretreatment unit 120.

In addition, as the acid alkali component is sufficiently pretreated, the chemical impact and load of the microorganisms growing on the porous ceramic carrier layer 141 are reduced, so that the activity of the microorganisms is maintained at the highest level and the survival rate is increased, thereby improving the removal efficiency of the odor gas and improving the microorganisms. Reduced replenishment can save on operating costs.

DESCRIPTION OF SYMBOLS 100: Biofilter type deodorizer, 110: Blower fan, 111: Inlet port, 112: Outlet port, 120: Pretreatment part, 120a: 1st filter part, 120b: 2nd filter part, 121a: Polyurethane foam layer, 121b: Polyurethane Foam layer, 122a: Polling layer, 122b: Polling layer, 123a: Acid water injector, 123b: Alkaline water injector, 124a: Acid water retention tank, 124b: Alkaline water retention tank, 130a: Acid water supply tank, 130b: Alkaline water supply tank, 131 : Submersible pump, 132: Inlet, 133: Hydrogen ion index sensor, 134: Temperature sensor, 135: Water level sensor, 136: Heater, 137: Outlet, 138: Overflow outlet, 140: Body, 141: Porous ceramic carrier layer, 142 : Limestone layer, 143: Treatment water injector, 144: Treatment water retention tank, 150: Treatment water storage tank, 151: Submersible pump, 152: Inlet port, 153: Hydrogen ion index sensor, 154: Temperature sensor, 155: Water level sensor, 156: heater, 157: outlet, 158: overflow outlet, 160: outlet, 161: water separator, 162: demister, 163: outlet, 164: differential pressure gauge, 170: controller,
L1: Inlet pipe, L2: Odor gas inlet pipe, L3: Acid water inlet pipe, L4: Acid water supply pipe, L5: Water supply pipe, L6: Acid water discharge pipe, L7: Overflow pipe, L8: Treatment water inlet pipe , L9: treated water supply pipe, L10: water supply pipe, L11: treated water discharge pipe, L12: overflow pipe,
V1: check valve, V2: check valve, V3: check valve, V4: check valve, V5: float valve, V6: drainage automatic valve, V7: check valve, V8: check valve, V9: check valve, V10: Shut-off valve, V11: Float valve, V12: Drainage automatic valve

Claims (8)

A blowing fan 110 that blows odor gas and blows it into the deodorizing apparatus 100;
The first filter unit 120a, the polling layer 122b, and the polyurethane foam layer 121b passing through the polyurethane foam layer 121a and the polling layer 122a by passing the odor gas from the blowing fan 110 in a downward flow. Pre-processing unit 120 consisting of a second filter unit (120b) passing in an upward flow;
An acidic water supply tank 130a into which an acidic chemical is introduced and circulated and supplied with acidic water whose hydrogen ion index is controlled to the first filter part 120a;
An alkaline water supply tank 130b into which an alkaline chemical is introduced and alkaline water whose hydrogen ion index is controlled is circulated and supplied to the second filter part 120b;
A main body 140 having a porous ceramic carrier layer 141 and a limestone layer 142 in which malodor gas is introduced from the pretreatment unit 120 and the microorganisms are fixed and grown;
A treated water storage tank 150 in which nutrients and microorganisms are introduced and the treated water whose hydrogen ion index is controlled is circulated and supplied to the main body 140;
The discharge unit 160 is discharged to the atmosphere after passing through the built-in separator 161 and the demister 162, the clean gas in which the odor component of the odor gas is removed from the main body 140; And
And a control unit (170) for optimizing the microbial growth environment of the porous ceramic carrier layer (141) by receiving a sensed signal and transmitting a control signal according to the input set value. The method of claim 1,
The polyurethane foam layers 121a and 121b have a pre-treatment part, which is a structure in which a polyurethane foamed layer 121a and 121b is formed by laminating a member cut and processed into a cube shape having a size of 3 to 5 × 3 to 5 × 1 to 2 cm. One biofilter deodorizer. The method of claim 1,
The first filter unit 120a may be installed at an acid water injector 123a for injecting acidic water supplied from the acidic water supply tank 130a at an upper portion thereof, and spaced below the acidic water injector 123a and provided at the blower fan 110. Malodorous gas flowing from the) and the acidic water injected from the acidic water injector (123a) is installed in contact with the polyurethane foam layer 121a, the polyurethane foam layer (121a) lower portion and passed through the polyurethane foam layer (121a) Characterized in that it consists of a polling layer 122a through which gas and acidic water pass downward, and an acidic water retention tank 124a which is disposed under the polling layer 122a and has odor gas and acidic water passing through the polling layer 122a. , Biofilter type deodorizer equipped with a pretreatment unit. The method of claim 1,
The second filter part 120b includes an alkaline water retention tank 124b in which the malodorous gas introduced from the first filter part 120a and the alkaline water injected through the alkaline water injector 123b remain, and the alkaline water retention tank ( The polling layer 122b located above and the polling layer 122b in which the odor gas flowing from the alkaline water retention tank 124b passes upward and the alkaline water injected through the alkaline water injector 123b passes downward to contact each other in countercurrent. 122b) Polyurethane foam layer 121b and the polyurethane, which are installed in contact with the upper portion, and the odor gas passing through the polling layer 122b pass upwards and the alkaline water injected through the alkaline water injector 123b passes downward to contact each other in countercurrent. Characterized in that the alkaline water injector 123b is installed on the foam layer 121b spaced apart and injects alkaline water supplied from the alkaline water supply tank 130b, A biofilter type deodorizer comprising a processing unit. The method of claim 1,
The main body 140 has an upper portion of one side of the wall surface connected to an upper portion of the one side of the wall surface of the second filter unit 120b of the pretreatment unit 120 so as to be distributed with each other, and a treatment water injector 143 for spraying the treatment water on the upper portion. ), The porous ceramic carrier layer 141 spaced apart from the treated water injector 143 and the growth space of the microorganism, the limestone layer 142 and the limestone layer 142 contacted to the lower portion of the porous ceramic carrier layer 141. Biofilter type deodorizing device having a pre-treatment unit, characterized in that consisting of the treated water retention tank 144 located in the lower portion. The method of claim 1,
The carrier embedded in the porous ceramic carrier layer 141 is characterized in that consisting of a component containing silica, alumina and iron oxide, a biofilter type deodorizing apparatus having a pretreatment unit. The method of claim 1,
The discharge unit 160 is a separator separator 161 in which the plate is arranged in a zigzag form, a grating plate-shaped demister 162 and the discharge pipe is installed in contact with the top of the demister 162 A biofilter type deodorizer having a pretreatment unit, comprising: 163. The method of claim 7, wherein
A differential pressure gauge 164 is installed between the odor gas inlet of the pretreatment unit 120 and the discharge pipe 163 to detect a pressure drop in the pretreatment unit 120 and the main body 140 and transmit it to the control unit 170. The biofilter type deodorizer provided with the preprocessing part characterized by the above-mentioned.

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