KR102085278B1 - Temperature control apparatus of bioreactor - Google Patents

Abstract

The present disclosure relates to a temperature control apparatus of a bioreactor, which is applied to a bioreactor having an air inlet and an air outlet. The temperature control apparatus of a bioreactor of the present invention comprises: a cooling tank installed at an upper layer part in an upper part of a bioreactor and having a suction port and an exhaust port separated from each other; an air supply fan connected to the suction port of the cooling tank to supply air; an exhaust fan connected to an air discharge unit formed on an upper end of the bioreactor to discharge air in which heat-exchange is finished; a wastewater injection unit positioned at an upper end of the cooling tank, extracting wastewater in the bioreactor to inject the same into the cooling tank; and a wastewater discharge unit uplifted from a plurality of umbrella-shaped cross sections in a lower part of the cooling tank. The injected wastewater and the supplied air may be in contact with each other to exchange heat in the cooling tank. Also, the temperature control apparatus further comprises an anti-scattering apparatus connected to a rear end of the exhaust fan, and introducing the air in which heat exchange is finished, discharged from the cooling tank and high-temperature and high-humidity air stagnated in the upper layer part in the bioreactor to prevent scattering of liquid and diffusion of odor.

Description

TEMPERATURE CONTROL APPARATUS OF BIOREACTOR}

The present invention relates to a temperature control device, and more particularly, to a temperature control device applied to a biological reaction tank of a wastewater treatment plant.

Wastewater or sewage is mixed with liquid or solid dirty substances, including organic substances, nutrient substances (N, P, etc.), toxic substances, and suspended inorganic substances, etc. We say water which we cannot use for life and business activity of person in that state. Wastewater treatment facilities to reduce the amount or concentration of pollutants by applying various treatment methods to remove pollutants contained in such wastewater or sewage, to prevent contamination of rivers or lakes, and to protect the habitat environment of underwater animals and plants. Is installing.

In general, a combination of physical, chemical, and biological treatments are employed to remove contaminants from wastewater treatment plants. Among them, the biological treatment method is mainly used as the main process of wastewater treatment, and organic materials in the influent can be stabilized or reduced by respiration, synthesis, and assetization using microorganisms.

Bioreactors can be installed and used to carry out biological treatment methods. When the liquid temperature in the bioreactors is 35 ± 5 ° C, microbial propagation and decomposition of organic substances is most active.

At this time, the bioreactor is supplied with a large amount of air using a blower to supply oxygen necessary for the activity of the microorganisms. In this process, air of a high temperature is supplied into the tank by the mechanical heat of the blower, and an exothermic reaction generated when organic matter is decomposed may increase the temperature of the wastewater. In particular, in summer, as the atmospheric temperature rises, the temperature of the wastewater in the bioreactor is further increased. As a result, when the temperature of the wastewater exceeds 40 ° C, microorganisms in the bioreactor may be killed and normal treatment may not be possible.

In addition, the bioreactor is configured in a closed structure to prevent the external diffusion of the odor, which is because the heat exchange with the atmosphere is not possible, the hot and humid air is stagnated in the upper part of the bioreactor to prevent the temperature of the waste water.

In order to solve this problem, conventionally, a method of cooling wastewater by cooling the air supplied to the bioreactor and supplying it in the tank or placing a cooling tower outside the bioreactor in contact with the air is used. However, the method of cooling the air supplied to the bioreactor has little effect of lowering the temperature of the wastewater, and the method of cooling the wastewater by placing a cooling tower on the outside causes pollution of the surroundings by causing external diffusion of odor and scattering of the wastewater. During periods of non-operation (January-May, October-December), they can act as stacks, causing problems with the spread of odors.

One aspect of the present invention is to contact the waste water and the outside air in the bioreactor to lower the temperature of the waste water, to prevent the external scattering of the waste water in advance and to discharge the hot and humid air located in the tank top layer to the outside to cool the waste water To improve the temperature and at the same time to provide a temperature control device of the biological reaction tank that can prevent the scattering of the liquid caused by the hot and humid air discharged to the outside and the diffusion of odor.

However, the problem to be solved by the embodiments of the present invention is not limited to the above-described problem can be variously extended within the scope of the technical idea included in the present invention.

The temperature control device of the bioreactor according to one embodiment of the present invention is a multipurpose temperature control device installed in a wastewater treatment facility and applied to a bioreactor having an air inlet and an air outlet, and installed in an upper layer of the bioreactor. A cooling tank having intake and exhaust ports spaced apart from each other, an air supply fan connected to the intake port of the cooling tank to supply air, an exhaust fan connected to an air outlet formed at an upper end of the bioreactor, and discharging the air after heat exchange; Located at the top of the cooling tank and includes a waste water injection unit for extracting the waste water in the biological reaction tank and sprayed into the cooling tank, and a waste water outlet portion raised in a plurality of hat cross section in the lower portion of the cooling tank, The injected waste water and the supplied air may contact each other to perform heat exchange. have.

The exhaust port of the cooling tank may be configured to open the interior of the bioreactor to a space adjacent to the air outlet to discharge the air after the heat exchange.

The waste water injection unit and the waste water is connected between the lower portion of the stored bioreactor, and a liquid circulation pump is installed may extract the waste water and further comprises a waste water supply pipe for supplying to the waste water injection unit.

The lower portion of the wastewater injection unit may include a conical dispersion induction member for inducing diffusion of the wastewater supplied from the wastewater injection unit.

The exhaust fan has a larger capacity than the air supply fan and may be discharged including hot and humid air stagnant in the upper portion of the bioreactor.

A scattering prevention device connected to a rear end of the exhaust fan and configured to introduce air having undergone heat exchange from the cooling tank and stagnant high temperature and high humidity air into an upper layer of the bioreactor to prevent scattering of liquid and diffusion of odor; It may further include.

The scattering prevention device, the first stage treatment unit including a multi-layered diaphragm to reduce the linear velocity of the liquid and odor contained in the introduced air, and remove the water of the first particle size, and water of fine particles at the top A second stage treatment unit which grows and removes water having a second particle size smaller than the first particle size by spraying, and removes water-soluble odors; and a third configured to spray and remove chemicals necessary for removing acidic and alkaline odors. It may include a processing unit.

The diaphragm may have a plurality of plates each having a cross section bent in opposite directions at both ends thereof to overlap each of the bent ends so as to form a zig-zag cross-sectional shape as a whole.

The diaphragm having the zigzag cross-sectional shape may be provided with a plurality of layers up and down.

According to the temperature control device of the bioreactor according to the present embodiment, the water temperature of the bioreactor is optimized for microorganisms by allowing heat exchange between air and wastewater inside the tank without separately installing a cooling device for waste water cooling. It can be maintained at the growth temperature (35 ± 5 ℃).

In addition, the waste water cooling efficiency in the bioreactor can be improved by discharging the hot and humid air stagnant in the upper portion of the bioreactor to the outside.

In addition, by aggregating moisture from the heat-exchanged air and spraying chemicals, it is possible to prevent external scattering and odor diffusion of waste water.

In addition, the liquid can be directly cooled using the existing bioreactor structure without installing a separate cooling tower, thus utilizing the existing internal conveying equipment (pump and piping) while maintaining the efficiency, thereby reducing construction costs and installation space. The effect can be obtained.

1 is a configuration diagram schematically showing a temperature control apparatus of a biological reactor according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating in detail the cooling tank of FIG. 1. FIG.
Figure 3 is a schematic diagram showing a scattering prevention device in the temperature control device of the biological reaction tank according to an embodiment of the present invention.
4 is an enlarged view of the diaphragm of FIG. 3.
FIG. 5 is a plan view showing a top view of a bioreactor equipped with a multipurpose temperature control apparatus according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail to be easily carried out by those of ordinary skill in the art. In the drawings, parts irrelevant to the description are omitted to clearly describe the present invention, and like reference numerals designate like elements throughout the specification.

In addition, throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, except to exclude other components unless specifically stated otherwise.

1 is a configuration diagram schematically showing a temperature control apparatus of a bioreactor according to an embodiment of the present invention, Figure 2 is a perspective view specifically showing the cooling tank of FIG.

The temperature control device 100 according to the present embodiment may be applied to the bioreactor 120 in the wastewater treatment facility. The bioreactor 120 is a facility for treating wastewater using microorganisms, and the like. The aerobic tank 121 converts ammonia nitrogen into nitrate nitrogen by supplying oxygen through the acid pipe 125 to remove organic matter and nitrification. And an oxygen-free tank 123 for removing nitrate nitrogen returned from the aerobic tank 121 by using the organic matter of the influent wastewater in the absence of oxygen.

1 and 2, the cooling tank 130 may be installed at an upper layer in the biological reactor 120. The cooling tank 130 includes an inlet port 131 and an exhaust port 132, and provides a space and a passage between the inlet port 131 and the exhaust port 132 to exchange heat with external air and waste water.

The bioreactor 120 is provided with an air inlet 127 and an air outlet 128 corresponding to the inlet 131 and the exhaust port 132 of the cooling tank 130, respectively, and the air supply fan 141 is It may be connected to the air inlet 127 and the exhaust fan 142 may be connected to the air outlet 128. The air supply fan 141 is installed adjacent to the inlet port 131 of the cooling tank 130, respectively, and the inlet port 131 and the exhaust port 132 may be spaced apart from each other at the top of the bioreactor 120. At this time, the exhaust fan 142 is designed to have a larger capacity than the air supply fan 141 and is supplied by the air supply fan 141 to complete the heat exchange in the cooling tank 130 as well as the upper layer part in the bioreactor 120. The hot and humid air stagnant can also be discharged to the outside. To this end, the exhaust port 132 of the cooling tank 130 may be configured to be opened to the space adjacent to the air outlet 128 in the biological reaction tank 120.

Waste water injection unit 150 is installed on the upper end of the cooling tank 130 may extract the waste water in the biological reaction tank 120 to be injected into the cooling tank 130. The wastewater injection unit 150 and the lower part of the bioreactor 120 are connected to the wastewater supply pipe 156 and a liquid circulation pump 157 is installed to draw up the wastewater stored in the lower portion of the bioreactor 120 to discharge the wastewater injection unit 150. Can be supplied to The conical dispersion induction member 153 is provided below the wastewater injection unit 150 to induce the diffusion of the supplied wastewater.

The bottom of the cooling tank 130 may be formed with a waste water outlet 154 raised in a plurality of hat cross-section. The wastewater sprayed from the wastewater sprayer 150 may contact the external air supplied through the inlet 131 to complete heat exchange, and then flow back into the lower portion of the bioreactor 120 through the wastewater outlet 154.

Meanwhile, the scattering prevention device 170 may be connected to the rear end of the exhaust fan 142. The scattering prevention device 170 may be configured to introduce air discharged from the cooling tank 130 to prevent scattering of liquids and diffusion of odors. Hereinafter, the present invention will be described in more detail with reference to FIG. 3.

Figure 3 is a schematic view showing a scattering prevention device in the temperature control device of the biological reaction tank according to an embodiment of the present invention, Figure 4 is an enlarged view of the diaphragm of FIG.

Referring to FIG. 3, the scattering prevention device 170 may sequentially process the first stage treatment part along a direction from the inlet 171 toward the outlet 172 in the main body 174 in which the inlet 171 and the outlet 172 are formed. (I), the second stage processor (II), and the third stage processor (III). The first stage processing unit I may directly connect with the inlet 171 to introduce air that has undergone heat exchange transmitted by the exhaust fan 142. The first stage processing unit I may include a multi-layered diaphragm 176 to reduce the linear velocity of the liquid and odor contained in the air introduced through the inlet 171 and to remove the water having the first particle size. The removed water is configured to be periodically discharged to the outside through the drain pipe. The second stage treatment unit II may spray the fine particles of water from the top to grow and remove moisture of the second particle size and to remove the water-soluble odor. The second particle size then has a diameter smaller than the first particle size.

The first stage treatment unit I and the second stage treatment unit II communicate with each other over the main body 174 of the scattering prevention device 170, and the water of the small particles that are not filtered out of the first stage treatment unit I is water-soluble odor. (Eg, with ammonia nitrogen (NH ₄ -N)) may be introduced into the second stage treatment unit (II). In the upper portion of the second stage treatment unit II, a flushing pipe 184 having an injection nozzle may be installed, and a diaphragm 178 may be installed in a lower portion thereof. The inclined surface 179 may be formed at the lower end of the second stage treatment unit II to design the falling water to flow, and the collected water may be supplied back to the washing pipe 184 by the washing pump 182. . That is, the water injected into the second stage treatment unit (II) through the water washing pipe 184 may reuse the effluent from the wastewater treatment plant, or may use time constant or ground water.

The main body 174 of the scattering prevention device 170 may be provided with a third stage processing unit III as a buffer space after the second stage processing unit II. The third stage treatment unit III and the second stage treatment unit II communicate with each other at a lower portion of the main body 174, and a diaphragm 178 is formed at a lower portion of the third stage treatment unit III, and the upper portion thereof has an outlet 172. Air treated in connection with the can be discharged through it. In addition, the third stage treatment unit (III) may be configured to spray by removing the chemicals necessary to remove the acidic odor and alkaline odor as necessary. Therefore, the chemical pipe 187 having the spray nozzle is installed on the third stage treatment unit III, and the chemical pipe 187 may be connected to the chemical pump 185.

Referring to FIG. 4, the diaphragms 176 and 178 installed in the processing units I, II, and III inside the main body 174 of the shatterproof device 170 are each bent in opposite directions at both ends. A plurality of plates are overlapped with each other by the curved ends to form a zig-zag cross-sectional shape as a whole. As described above, the diaphragms 176 and 178 having a zigzag cross-sectional shape may be provided with a plurality of layers vertically.

FIG. 5 is a plan view showing a top view of a bioreactor equipped with a multipurpose temperature control apparatus according to an embodiment of the present invention.

In this embodiment, the biological reaction tank 120 may include an anaerobic tank 123 and an aerobic tank 121 which are separated from each other. The temperature control device 100 may be installed in the aerobic tank 121 of the biological reactor (120). As shown in FIG. 5, the air supply fan 141 is connected to the air inlet 127 formed at one side of the aerobic tank 121, and the air outlet 128 formed at the other side of the aerobic tank 121 is provided. It can be configured by connecting the exhaust fan 142 and the scattering prevention device 170 in the installation.

The cooling tank 130 is positioned between the air supply fan 141 and the exhaust fan 142 so as to communicate with the air inlet 127, and a wastewater supply pipe 156 is positioned at an upper portion thereof to discharge the wastewater into the cooling tank 130. Can spray

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the scope of the invention.

100: thermostat 120: biological reactor
121: aerobic tank 123: anaerobic tank
125: diffuser 127: air inlet
128: air outlet 130: cooling tank
131: intake port 132: exhaust port
141: supply fan 142: exhaust fan
150: wastewater injection unit 153: conical dispersion induction member
154: wastewater outlet 156: wastewater supply pipe
157: liquid circulation pump 170: scattering prevention device
171: inlet 172: outlet
174: shatterproof device body 176, 178: diaphragm
179: slope 182: flush pump
184: flush tubing 185: chemical pump
187: chemical piping

Claims (7)

In the temperature control device applied to the bioreactor having an air inlet and an air outlet,
A cooling tank installed at an upper portion of the bioreactor and having an inlet port communicating with an air inlet of the bioreactor and an exhaust port spaced from the inlet port;
An air supply fan connected to an intake port of the cooling tank to supply air;
An exhaust fan connected to the air discharge unit formed at the upper end of the bioreactor for discharging the air having undergone heat exchange;
A wastewater injection unit positioned at an upper end of the cooling tank to extract wastewater in the biological reaction tank and spray the wastewater into the cooling tank; And
Waste water outlet portion raised in a plurality of hat cross-section on the lower portion of the cooling tank
Including,
In the cooling tank, the injected waste water and the supplied air contact each other, and heat exchange is performed.
The exhaust port of the cooling tank is configured to open the inside of the bioreactor to the space adjacent to the air outlet portion to discharge the air after the heat exchange, the temperature control device of the bioreactor. delete The method of claim 1,
And a conical dispersion induction member for inducing diffusion of wastewater supplied from the wastewater injection unit below the wastewater injection unit. The method of claim 1,
The exhaust fan has a larger capacity than the air supply fan, and includes a high temperature and humid air stagnant in the upper portion in the bioreactor to discharge, the temperature control device of the bioreactor. The method of claim 1,
A scattering prevention device connected to a rear end of the exhaust fan and configured to introduce air having undergone heat exchange from the cooling tank and stagnant high temperature and high humidity air into an upper layer of the bioreactor to prevent scattering of liquid and diffusion of odor; Further comprising, the temperature control device of the biological reactor. The method of claim 5, wherein
The scattering prevention device,
A first stage treatment part including a multi-layered diaphragm to reduce linear velocity of the liquid and odor contained in the introduced air and to remove moisture having a first particle size;
A second stage treatment unit spraying water of fine particles from the top to grow and remove water having a second particle size smaller than the first particle size, and to remove water-soluble odor; And
Third stage treatment unit configured to spray and remove chemicals required to remove acidic and alkaline odors
Comprising, the temperature control device of the biological reactor. The method of claim 6,
The diaphragm has a plurality of plates, each of which has a cross section bent in opposite directions at both ends thereof, so that the bent ends face each other and overlap each other to form a zig-zag cross-sectional shape as a whole.

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