KR20240020479A - Sewage pipe odor backflow blocking device using durable foam and Blocking method by the device - Google Patents

Abstract

The present invention relates to a sewer pipe odor backflow blocking device and blocking method using persistent foam. The odor backflow blocking device includes a foam generator that blows air into a mixed solution containing a surfactant and water to create foam; a foam transport means for transporting the foam produced in the foam generating unit to the sewer pipe; a foam ejection unit that receives the foam transported by the foam transport means and ejects it into the sewer pipe to fill the inside of the sewer pipe with the foam and block the flow of odor; It includes a control unit that controls the foam generating unit, the foam transport means, and the foam ejection unit.
The sewer pipe odor backflow blocking device using the persistent foam of the present invention as described above prevents the backflow of odor by filling the space above the water surface of the sewer pipe with eco-friendly foam, thereby preventing the backflow of odor from sewer pipes piped at points where it is difficult to install a mechanical blocking device. Even bad odors can be blocked. In addition, by mixing microorganisms for water quality improvement into the foam, the water quality of the sewage is improved on its own while the sewage is moving to the sewage treatment plant, thereby reducing bad odor more effectively and further reducing the load on the sewage treatment plant. .

Description

Sewage pipe odor backflow blocking device using durable foam and Blocking method by the device}

The present invention relates to a malodor blocking device and method for blocking the backflow of foul odors in sewer pipes. More specifically, the present invention relates to an odor blocking device and blocking method for blocking the backflow of foul odors in sewer pipes, and more specifically, to prevent the movement of foul odors by ejecting persistent foam into sewer pipes and blocking the flow passage of foul odors within sewer pipes with the foam. This relates to a sewer pipe odor backflow blocking device and blocking method using persistent foam.

Domestic sewage generated from apartments, schools, hospitals, houses, etc. is sent to a sewage treatment plant through sewage pipes piped underground. At a sewage treatment plant, the inflow of domestic sewage is purified through a designated treatment process and then discharged into the river.

However, if the flow rate of sewage passing through the sewer pipe is not large, the odor inside the sewer pipe often flows back and flows indoors. Especially in the hot and humid summer season, sewage stagnating in sewers decays, creating an even worse odor, and sometimes hatched mosquitoes infiltrate households through sewer pipes.

This phenomenon cannot be eliminated because of the piping method, which requires designing the slope of the sewer pipe to be low, and unless the flow rate passing through the sewer pipe cannot be intentionally controlled. Instead, the odor generated cannot be eliminated. Technology to block this is being proposed.

For example, in Domestic Patent Publication No. 10-1868692, a sewer pipe odor blocking device is disclosed that prevents odor from flowing back to the ground by closing the sewer pipe when there is no sewage flow.

The disclosed odor blocking device includes an annular wing of an inner flange and an outer flange that are assembled in a double overlapping manner, a flange member that can be contracted/relaxed by an opening cut in the cylindrical body, and PVC on the inside and outside of the elastic fabric woven fabric. A tube member coated with polyethylene and PE and equipped with a load member at the outer end is assembled at the sewer pipe inlet, and the tube member is temporarily opened or pressed by the weight of the load member due to rainwater flowing into the sewer pipe, thereby eliminating the foul odor of the sewer pipe. In blocking backflow, a band-shaped elastic band is assembled to the flange member to maintain the elasticity of the outer flange to spread outward, and the steel band extending long from the elastic band is located on the inner side of the tube member. Thus, it has a configuration that induces the tube member to spread out on the bottom of the sewer pipe.

However, the odor blocking device has the disadvantage that as it is used for a long time, contaminants are deposited on the tube member itself, and the odor blocking device acts as a source of odor. Additionally, if the tube member is frozen in a pressed state during the winter, there is a problem in that it cannot discharge water when water to be drained flows in, and rather acts as a stopper blocking the sewer pipe.

The present invention was created to solve the above problems. It can block odors generated from sewage pipes piped in locations where it is difficult to install a mechanical blocking device, and leads to improvement in the water quality of sewage while it is moving to the sewage treatment plant. The purpose is to provide a sewer pipe odor backflow blocking device and blocking method using persistent foam that reduces odor more effectively.

The sewer pipe odor backflow blocking device using persistent foam of the present invention as a means of solving the problem for achieving the above object includes a foam generator that ejects air into a mixed solution containing a surfactant and water to create foam; a foam transport means for transporting the foam produced in the foam generating unit to the sewer pipe; a foam ejection unit that receives the foam transported by the foam transport means and ejects it into the sewer pipe to fill the inside of the sewer pipe with the foam and block the flow of odor; It includes a control unit that controls the foam generating unit, the foam transport means, and the foam ejection unit.

In addition, the bubble transport means; It includes a bubble induction pipe connecting the foam generating unit and the foam ejection unit, and a transfer pump for pumping foam through the bubble induction pipe, and the foam ejection unit includes; It is mounted on a sewer pipe and has a spray nozzle that ejects foam that has passed through the bubble guide pipe into the sewer pipe.

Additionally, an odor sensor is installed in the sewer pipe, which detects the concentration of odor inside the sewer pipe and transmits the detection information to the control unit, allowing the control unit to decide whether to supply foam.

Additionally, a camera is further installed inside the sewer pipe to capture images of the inside of the sewer pipe and transmit them to the outside.

In addition, the inside of the sewer pipe is further equipped with a flow rate sensor that determines the flow rate of sewage flowing inside the sewer pipe and transmits the determined information to the control unit, allowing the control unit to decide whether to supply foam.

In addition, a water level sensor is further installed inside the sewer pipe to determine the water level of sewage flowing inside the sewer pipe and then transmits the information to the control unit, allowing the control unit to decide whether to supply foam.

Additionally, on the downstream side of the spray nozzle, a foam loss suppression unit is provided to prevent foam ejected through the spray nozzle from being lost due to the flow of sewage.

And, the foam loss suppression unit; The upper end is fixed to the upper side of the inner wall of the sewer pipe and hangs downward, the lower end is located at a level below the water surface of the sewage, and includes a blocking sheet that blocks the flow of bubbles.

In addition, the method for blocking and blocking backflow of bad odors in sewer pipes using the persistent foam of the present invention is a method of blocking backflow of bad smells in sewer pipes, which includes an odor concentration detection step of determining the bad odor concentration inside the sewer pipe; When the identified odor concentration is higher than the standard value, a foam supply step is included, which ejects foam into the sewer and blocks the odor backflow passage with the foam.

In addition, as a process that proceeds after the start of the foam supply step, an odor concentration confirmation step of checking the odor concentration in the space upstream of the ejected foam; If the confirmed odor concentration falls below the standard value, there is an additional foam blocking step to block the supply of foam.

The sewer pipe odor backflow blocking device using the persistent foam of the present invention as described above prevents the backflow of odor by filling the space above the water surface of the sewer pipe with eco-friendly foam, thereby preventing the backflow of odor from sewer pipes piped at points where it is difficult to install a mechanical blocking device. Even bad odors can be blocked.

In addition, by mixing microorganisms for water quality improvement into the foam, the water quality of the sewage is improved on its own while the sewage is moving to the sewage treatment plant, thereby reducing bad odor more effectively and further reducing the load on the sewage treatment plant. .

Figure 1 is a diagram for explaining the concept of a sewer pipe odor backflow blocking device using persistent foam according to an embodiment of the present invention.
Figure 2 is a block diagram showing the overall configuration of a sewer pipe odor backflow blocking device using persistent foam according to an embodiment of the present invention.
Figure 3 is a diagram showing the malodor backflow blocking device according to an embodiment of the present invention mounted on a sewer pipe.
Figure 4 is a diagram showing the operation of the odor backflow blocking device shown in Figure 3.
Figure 5 is a diagram showing the foam loss suppression unit applied to the blocking device of Figure 3.
Figure 6 is a longitudinal cross-sectional view of a sewer pipe showing the installation structure of the blocking sheet shown in Figure 5.
Figure 7 is an exploded perspective view showing a modified example of the foam loss suppressor of Figure 5.
Figure 8 is a diagram showing a configuration in which a different type of foam loss suppression unit is applied to the blocking device of Figure 3.
Figure 9 is a flowchart illustrating a method for blocking sewer pipe odor backflow using persistent foam according to an embodiment of the present invention.

Hereinafter, one embodiment according to the present invention will be described in more detail with reference to the attached drawings.

Figure 1 is a diagram for explaining the concept of a sewer pipe odor backflow blocking device 30 using persistent foam according to an embodiment of the present invention.

The sewer pipe odor backflow blocking device 30 according to this embodiment blocks bad odor backflow from the sewer pipe using foam. In other words, foam is ejected into the discharge pipe 15 and the sewer pipe, and the foam blocks the flow path of the odor, thereby preventing the odor from rising. The odor flow passage includes the flow space within the sewer pipe 16 and the discharge pipe 15.

In addition, the foam created in the foam generating unit 31, which will be described later, may be ejected simultaneously into both the discharge pipe 15 and the sewer pipe 16, may be ejected only into the discharge pipe 15, or may be ejected only into the sewer pipe 16. In this explanation, only the ejection of foam into the sewer pipe 16 has been described.

Referring to FIG. 1, it can be seen that a sewer pipe 16 is buried in the ground below the building 11, and each building and the sewer pipe 16 are connected by a discharge pipe 15. The discharge pipe 15 is a pipeline through which domestic sewage or sewage discharged from the building 11 drains.

Additionally, a foam generating unit 31 and a control unit 37 are installed inside each building 11. The foam generating unit 31 is a component of the blocking device 30 of this embodiment and serves to create foam. The foam created in the foam generator (31) lasts for about 10 hours and goes down to the sewer pipe (16) through the foam induction pipe (32) to block the odor flow passage, thereby preventing the odor from rising through the discharge pipe (15). prevent it from happening

The control unit 37 controls all of the foam generating unit 31, the monitoring unit 35, the foam ejection unit 33, and the powered foam loss suppression unit (50 in FIG. 8), which will be described later.

As described above, when the foam generating unit 31 and the control unit 37 are installed and operated within the building 11, the odor backflow blocking device 30 can be operated according to the selection of the occupants of the building.

Reference number 13 is the management building. The management building 13 is a building operated by the local government in the region and has a foam generating unit 31 (larger capacity) and a control unit 37. The foam generating unit 31 and the control unit 37 installed in the management building 13 generate foam in the sewer pipe 16 in the area where the building 11 is located, regardless of whether or not odor is generated in each building 11. supply to completely block the outflow of bad odors. For example, when the sewage flow rate inside the sewer pipe 16 is low and a bad odor is expected to occur, foam is ejected.

Figure 2 is a block diagram showing the overall configuration of a sewer pipe odor backflow blocking device using persistent foam according to an embodiment of the present invention.

As shown, the sewer pipe odor backflow blocking device 30 according to the present embodiment includes a control unit 37, a foam generating unit 31, a foam transport means, a foam ejection unit 33, and a foam loss suppression unit 40. ,50), including a monitoring unit (35) and an administrator terminal (39).

The control unit 37 is a controller that outputs all control signals for driving the backflow blocking device 30. That is, it is connected to the foam generating unit 31, the transfer pump 34, and the foam loss suppression unit 50, and outputs a control signal appropriate for the situation. The manager can input a set value into the backflow blocking device 30 through the control unit 37.

The set value can be said to be a threshold that determines whether to output bubbles or not. For example, foam is output as soon as the odor concentration inside the sewer pipe 16 exceeds the set concentration, foam is output when the flow rate of sewage flowing through the sewer pipe is below the set speed, and foam is output when the sewage water level is below a certain level. This is the standard value that causes bubbles to be printed. If the set value is entered, the backflow blocking device 30 can be operated automatically.

The control unit 37 is wirelessly connected to the manager terminal 39. The administrator terminal 39 is a smartphone or tablet PC carried by the administrator. The manager can remotely control the backflow blocking device (30) using his/her manager terminal (39) from a remote location.

The bubble generating unit 31 serves to create bubbles to be ejected into the sewer pipe 16. The foam generating unit 31 includes a raw material mixer 31a and an air injector 31b.

The raw material mixer 31a is a device that mixes surfactants, foam sustaining agents, and microorganisms supplied from outside with water. The ratio of each raw material input may vary. The foam sustaining agent may include any one of glycerin, gelatin, clay, oil, starch, and xanthan gum, and is added in a ratio that allows the foam to last for about 10 hours. Microorganisms are functional bacteria that decompose odor-producing substances.

Depending on the embodiment, an oxidizing agent may be added in addition to surfactants, foam sustaining agents, and microorganisms. For example, one of potassium permanganate, sodium persulfate, or hydrogen peroxide is selectively added. These oxidizing agents not only decompose and remove bad odors, but also lower the load on sewage treatment plants by removing organic substances mixed in sewage.

The air injector 31b blows air into the raw material mixture to create bubbles. The bubbles created by the air injector (31b) are pumped by the transfer pump (34) and transferred to the bubble ejection unit (33).

The foam transfer means moves the foam created in the foam generating unit 31 to the foam ejection unit 33, and includes a foam induction pipe 32 and a transfer pump 34.

The bubble induction pipe 32 is a pipe that connects the bubble generating part 31 and the bubble ejecting part 33. Additionally, the transfer pump 34 is installed in the bubble induction pipe 32 and serves to pump bubbles. The control unit 37 can control the transfer pump 34 to control the amount of bubbles ejected in the sewer pipe.

The foam ejection unit 33 ejects the foam transported by the foam transport means, that is, the control unit 37, into the inside of the sewer pipe 16, and as shown in FIG. 4, the foam Z penetrates the inside of the sewer pipe. Fill it to block the flow of odor backflow in the direction of arrow c.

This foam ejection unit 33 includes a foam receiver 33a and a plurality of injection nozzles 33b. The foam receiver (33a) is a hollow case fixed to the outer peripheral surface of the sewer pipe (16) and includes a spray nozzle (33b) in its inner area. The foam receiver (33a) distributes the foam supplied through the foam induction pipe (32) to the spray nozzle (33b). The transfer pressure of the transfer pump 34 acts on the inside of the foam receiver 33a.

The spray nozzle 33b is accommodated in the inner area of the foam receiver 33a and ejects the delivered foam into the sewer pipe 16. The foam (Z) sprayed through the spray nozzle (33b) is maintained on the water surface of the sewage (W) and fills the inner space of the sewer pipe (16) to prevent backflow of bad odor. The internal space of a sewer pipe is the space above the sewage water table.

The sprayed foam is not easily washed away by the sewage water (W) flowing in the direction of arrow a in FIG. 4. This is because the bubbles Z are gathered together by surface tension and remain attached to the inner wall of the sewer pipe 16.

Of course, the foam (Z) in the part that is in direct contact with the sewage (W) may be lost due to the influence of the sewage. However, by continuously supplying the amount of foam that is lost, the foam (Z) can continuously block the odor backflow space.

Additionally, as long as the bubble (Z) is in contact with flowing water, it cannot help but receive the kinetic energy of the water, so the bubble (Z) can gradually move downstream over time. Since this movement of the bubbles is not desirable, in this embodiment, the foam loss suppression units 40 and 50 are applied to suppress the downstream movement of the bubbles as much as possible. This will be explained later.

However, if the flow rate of sewage increases and the water level is high and the flow rate is fast, even if foam (Z) is supplied, foam is not supplied because the foam is easily lost. In fact, when the flow rate increases, there is no need to supply foam because no foul odor arises anyway. The odor backflow blocking device 30 of this embodiment operates only when the water level of the sewage W is low and the flow rate is slow, so that odor generation conditions are established or when odor is detected.

The monitoring unit 35 monitors the internal situation of the sewer pipe 16 and transmits the monitoring results to the control unit 37. The control unit 37 determines whether to supply bubbles or wait based on the information received through the monitoring unit 35.

The monitoring unit 35 includes an odor sensor 35a, a camera 35c, a water level sensor 35e, and a flow sensor 35g.

The odor sensor 35a detects the odor concentration inside the sewer pipe 16. Based on the odor concentration information received from the odor sensor 35a, the control unit 37 ejects foam when the odor concentration is higher than the set value. However, if the concentration is lower than the set value, it waits for now.

The camera 35c photographs the situation inside the sewer pipe 16 and transmits the captured image to the control unit 37. The control unit 37 transmits the image captured by the camera 35c to the manager terminal 39. The manager can check the internal situation of the sewer pipe 16 through his or her terminal. For example, it is possible to determine in real time whether the bubble (Z) is well maintained.

The water level sensor 35e is a sensor that detects the water level of sewage (W) flowing through the sewer pipe 16, and the flow rate sensor 35g is a sensor that detects the flow rate of sewage. The water level and flow rate information detected by the water level sensor 35e and the flow sensor 35g are transmitted to the control unit 37, which allows the control unit to decide whether to spray foam.

The control unit 37 does not spray foam when the water level is higher than the set value and at the same time the flow speed is faster than the set speed. However, in situations where the odor concentration is higher than the set point, when the water level is higher than the set point but the flow speed is slow, or when the flow speed is faster than the set point but the water level is low, foam is sprayed.

A description of the foam loss suppression units 40 and 50 will be provided later.

Figure 3 is a diagram showing a part of the odor backflow blocking device 30 according to an embodiment of the present invention applied to the sewer pipe 16, and Figure 4 shows foam (Z) using the spray nozzle shown in Figure 3. This is a drawing showing spraying.

As shown, a plurality of spray nozzles 33b, odor sensors 35a, and cameras 35c are disposed on the upper inner wall of the sewer pipe 16.

The spray nozzle (33b) receives the foam collected in the foam receiver (33a) and ejects it into the sewer pipe (16). The ejected foam (Z) adheres to the inner wall of the sewer pipe (16), and some of it touches the water surface of the sewage pipe (W). The foam (Z) that touches the sewage receives force in the direction of the flow of sewage, that is, arrow a, due to friction with the sewage.

The friction force in the direction of arrow a varies depending on the water level and flow rate of the sewage (W). Compared to the friction force, if the adhesion force between the inner wall of the sewer pipe 16 and the foam is large, the foam almost stays in place. Of course, the bubbles (Z) sink as the bubbles in the lower layer burst, but since bubbles are continuously supplied from the outside, the volume of the bubbles remains almost constant.

Conversely, if the friction force is greater, the bubbles (Z) move in the direction of the sewage flow. At this time, the foam loss suppression units 40 and 50 act.

As described above, the camera 35c captures the internal situation of the sewer pipe 16 and transmits the image to the control unit 37. Additionally, the odor sensor 35a senses the odor concentration inside the sewer pipe. And the water level sensor 35e detects the water level of the sewage water (W). The increase or decrease in sewage flow rate is always sensed by the water level sensor (35e). The flow rate sensor (35g) is located at the bottom of the sewer pipe 16 and detects the flow rate of sewage.

The detected contents of the odor sensor 35a, the water level sensor 35e, and the flow sensor 35g and the captured contents of the camera 35c are transmitted to the control unit 37 via the communication relay unit 61. The communication relay unit 61 amplifies the signals detected by each sensor, removes noise, and transmits them to the control unit 37.

Figure 5 is a diagram showing the foam loss suppression unit applied to the blocking device of Figure 3, and Figure 6 is a cross-sectional view taken along line D-D of Figure 5.

Hereinafter, the same reference numbers as the above-mentioned reference numbers indicate the same members with the same function, and repeated descriptions thereof will be omitted.

Referring to the drawing, it can be seen that a plurality of foam loss suppression units 40 are installed on the downstream side of the injection nozzle 33b. The foam loss suppressing unit 40 serves to suppress foam erupted in the sewer pipe 16 from being lost due to the flow of sewage. In other words, the goal is to prevent the bubbles (Z) from being washed away into the sewage (\) as much as possible.

As mentioned above, when the water level of the sewage is low, the adhesive force between the foam (Z) and the inner wall of the sewer pipe is relatively large compared to the friction force between the foam and the sewage, so the phenomenon of foam floating away rarely occurs. There is no need to worry about foam loss. If it is certain that the sewage water level is always low, there is no need for a foam loss control unit.

However, in the case of a sewer pipe where the change in sewage flow rate is large, it is advantageous to install and operate the foam loss suppression unit 40 in preparation for a sudden increase in flow rate.

The foam loss suppression unit 40 shown as an example in FIGS. 5 and 6 includes a holder 41, a blocking sheet 42, and a weight 43.

The blocking sheet 42 is made of non-woven fabric cut to match the cross-sectional shape of the sewer pipe, and the upper end is coupled to the holder 41. The holder 41 is an arc-shaped member fixed to the upper end of the inner wall of the sewer pipe 16 and suspends and supports the blocking sheet 42.

The blocking sheet 42 is fixed to the holder 41 and hangs downward by its own weight. In particular, the lower end of the blocking sheet 42 is located at a level below the water surface of the sewage water (W). The weight 43 is a horizontal rod-shaped member fixed to the lower end of the blocking sheet 42, and serves to ensure that the lower end of the blocking sheet 42 is always submerged in water. Naturally, the specific gravity of weight 43 is greater than that of water. The reason for applying the weight 43 in this way is to prevent the foam from passing through the lower part of the blocking sheet 42 by lifting it upward.

Figure 7 is an exploded perspective view showing a modified example of the foam loss suppressor of Figure 5.

The foam loss suppression unit 40 shown in FIG. 7 is a replacement type.

As shown, a slit-shaped installation hole 16a is formed in the upper part of the sewer pipe 16. The installation hole 16a is a through passage perpendicular to the direction of extension of the sewer pipe, and passes through the blocking sheet 42. Additionally, a seating groove 16b is provided around the installation hole 16a. The seating groove 16b is a groove of a certain depth that accommodates the installation hole 16a in its inner area.

The loss suppression unit 40 of FIG. 7 is composed of a curved disk-shaped holder 41, a blocking sheet 42, and a weight 43. After inserting the blocking sheet 42 into the installation hole 16a and fixing the holder 41 in the seating groove 16b, installation of the foam loss prevention unit 40 is completed.

FIG. 8 is a diagram showing a configuration in which a different type of foam loss suppression unit 50 is applied to the backflow blocking device of FIG. 3.

The foam loss suppression unit 50 shown in FIG. 8 includes a blower 51 and a plurality of air nozzles 53. The air nozzle 53 is located on the downstream side of the spray nozzle 33b and ejects air diagonally upstream. The bubbles (Z) can be pushed upstream by the air sprayed from the air nozzle 53. By adjusting the blowing pressure of the air nozzle, it is possible to prevent the bubbles (Z) from being pushed up or down. The blower 51 is controlled by the control unit 37.

Figure 9 is a flowchart illustrating a method for blocking sewer pipe odor backflow using persistent foam according to an embodiment of the present invention.

As shown, the method for blocking odor backflow from sewer pipes using persistent foam according to this embodiment includes an odor concentration detection step (101), a sewage monitoring step (103), a foam supply step (105), and an odor concentration confirmation step (107). , including a bubble blocking step (109).

The odor concentration detection step 101 is a process of determining the odor concentration inside the sewer pipe 16 using the odor sensor 35a. As described above, the odor sensor 35a determines the odor concentration inside the sewer pipe and transmits the determined data to the control unit 37. The odor concentration detection step 101 is performed at regular intervals throughout 24 hours.

The control unit 37 does not take any action when the concentration of the identified odor is lower than the standard value, and performs the sewage monitoring step 103 when it is higher than the standard value.

The sewage monitoring step 103 is a process of determining the water level and flow rate of sewage water (W) using the water level sensor 35e and the flow rate sensor 35g. Through the sewage monitoring step 103, when the flow rate of sewage is slow or the water level is low, that is, when the flow rate and water level are slower or lower than the set values, the foam supply step 105 is performed.

The foam supply step 105 is a process of operating the foam generator 31 and the transfer pump 34 to eject foam into the sewer pipe 16 through the spray nozzle 33b, thereby blocking the odor backflow passage.

The odor concentration confirmation step 107 is a process that proceeds after the start of the foam supply step 105 and is a process of confirming the odor concentration in the space upstream of the ejected foam. The reason for checking the concentration of the upstream space is to check whether the foam (Z) is properly blocking the odor.

As a result of checking the odor concentration, if the odor concentration is lower than the standard value, the supply of foam is temporarily stopped through the foam blocking step (109). However, if the concentration of the odor has not yet decreased, the supply of foam continues to fill the sewer pipe 16 with foam. This process is repeated until the concentration of the upstream odor decreases.

As described above, the sewer pipe odor backflow blocking device of this embodiment is configured to block the passage through which odor moves by blocking it with foam, and can effectively prevent the backflow of odor without using a separate mechanical device. Moreover, since the foam contains functional bacteria that decompose odor-generating substances, it additionally provides a purification function for the sewage itself.

Above, the present invention has been described in detail through specific embodiments, but the present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art within the scope of the technical idea of the present invention.

11: Building 13: Management Building 15: Discharge Pipe
16: Sewer pipe 16a: Installation hole 16b: Seating groove
30: Backflow blocking device 31: Bubble generator 31a: Raw material mixer
31b: Air injector 32: Bubble induction pipe 33: Bubble ejection unit
33a: Bubble receiver 34: Transfer pump 35: Monitoring unit
35a: Odor sensor 35c: Camera 35e: Water level sensor
35g: Flow sensor 37: Control unit 39: Administrator terminal
40: Foam loss suppression unit 41: Holder 42: Blocking sheet
43: Weight 50: Foam loss suppression unit 51: Blower
53: Air nozzle 61: Communication relay unit

Claims (10)

a foam generator that blows air into a mixed solution containing a surfactant and water to create foam;
a foam transport means for transporting the foam produced in the foam generating unit to the sewer pipe;
a foam ejection unit that receives the foam transported by the foam transport means and ejects it into the sewer pipe to fill the inside of the sewer pipe with the foam and block the flow of odor;
Includes a control unit that controls the foam generating unit, foam transport means, and foam ejection unit,
A sewer pipe odor backflow blocking device using persistent foam. According to paragraph 1,
The foam transport means is;
It includes a bubble induction pipe connecting the foam generating unit and the foam ejection unit, and a transfer pump that pumps foam through the foam induction pipe,
Bubble ejection part;
It is mounted on a sewer pipe and has a spray nozzle that ejects foam that has passed through the bubble guide pipe into the sewer pipe,
A sewer pipe odor backflow blocking device using persistent foam. According to paragraph 2,
In the sewer pipe,
An odor sensor is installed that detects the odor concentration inside the sewer pipe and then transmits the detection information to the control unit, allowing the control unit to decide whether to supply foam.
A sewer pipe odor backflow blocking device using persistent foam. According to paragraph 3,
Inside the sewer pipe,
It is further equipped with a camera that takes pictures of the inside of the sewer pipe and transmits them to the outside.
A sewer pipe odor backflow blocking device using persistent foam. According to paragraph 2,
Inside the sewer pipe,
It is further equipped with a flow sensor that determines the flow rate of sewage flowing inside the sewer pipe and transmits the determined information to the control unit, allowing the control unit to decide whether to supply foam.
A sewer pipe odor backflow blocking device using persistent foam. According to paragraph 2,
Inside the sewer pipe,
A water level sensor is further installed to determine the level of sewage flowing inside the sewer pipe and then transmit the information to the control unit to determine whether to supply foam.
A sewer pipe odor backflow blocking device using persistent foam. According to paragraph 2,
On the downstream side of the injection nozzle,
Equipped with a foam loss suppression unit that prevents the foam ejected through the spray nozzle from being lost due to the flow of sewage,
A sewer pipe odor backflow blocking device using persistent foam. In clause 7,
The foam loss suppression unit;
The upper end is fixed to the upper side of the inner wall of the sewer pipe and hangs downward, the lower end is located at a level below the water table of the sewage, and includes a blocking sheet that blocks the flow of bubbles,
A sewer pipe odor backflow blocking device using persistent foam. As a method of blocking the backflow of odors in sewer pipes,
An odor concentration detection step of determining the odor concentration inside the sewer pipe;
When the identified odor concentration is higher than the standard value, it includes a foam supply step that ejects foam into the sewer and blocks the odor backflow passage with foam.
A method of blocking sewer pipe odor backflow using persistent foam. According to clause 9,
As a process that occurs after the start of the foam supply step,
An odor concentration confirmation step of checking the odor concentration in the space upstream of the ejected foam;
It further has a foam blocking step to block the supply of foam when the confirmed odor concentration falls below the standard value,
A method of blocking sewer pipe odor backflow using persistent foam.

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