JP2020065888A - Method and treatment device for conducting removal of hydrogen sulfide in sewerage pipe and agricultural waste water pipe caused by renewal and repair of sewerage, and decomposition of indigenous bacteria and organic matter - Google Patents

Abstract

To overcome instantaneous generation of accidental troubles of a maintenance management operator even after ventilation or detachment of a corrosion part in a sewerage pipe during conduction of regeneration construction by novel lining construction in the sewerage pipe by generation of hydrogen sulfide due to sulfur reduction bacteria for conducting sewerage maintenance, which is consequent phenomenon generated by activation of bacteria remaining in the sewerage pipe.SOLUTION: According to an embodiment of the present invention, irreversible neutralization of hydrogen sulfide is conducted, environment in a sewerage pipe is improved by sterilization of various bacteria such as sulfur reduction bacteria and sulfur oxidation bacteria, and hydrogen sulfide concentration is an extremely low value during conducting novel lining construction in the sewerage pipe. Short time conduction of the irreversible neutralization of hydrogen sulfide provides a short time reaction of strong oxidation effects similar to concrete corrosion by sulfur oxidation bacteria in the sewerage pipe in long time. Recovery of alkalinity of a concrete surface by oxidation is needed to be conducted by spraying an alkali solution with pH of 12 or more after completion of hydrogen sulfide removal operation.SELECTED DRAWING: Figure 2

Description

It is related to sewer and agricultural wastewater pipe rehabilitation / repair, hydrogen sulfide, organic matter decomposition, and removal of indigenous bacteria.

In order to carry out a social life, domestic water is used in accordance with life or production, or a large amount of water is used for intermediate treatment and washing accompanying production of a product. In some industries, some water is reused by reprocessing the water, but in many cases, it is eventually sewage. As for general domestic wastewater, the sewage pipeline contains a large amount of sulfur-containing organic substances such as manure, which causes fermentation, decomposition, and binding chemistry due to anaerobic and aerobic bacteria floating in the air. Although varied, various secondary products are produced during the fermentation decomposition process.

When submersing in a pipeline facility, when performing on-site work such as inspections and surveys, fully recognize that there is a danger of oxygen deficiency, hydrogen sulfide poisoning, falling, etc., and always perform strict safety confirmation. There is a need. When working, ensure the safety of road traffic by working zones, etc., and ensure the safety of work by making the oxygen concentration 18% or more and the hydrogen sulfide concentration 10ppm or less by ventilation. In particular, hydrogen sulfide is extremely toxic, and there are many places that generate high-concentration hydrogen sulfide that causes immediate death, so it is considered to be one of the most important precautions among accidents involving personal injury in sewer maintenance work.

Sulfate production from the process of hydrogen sulfide generation by sulfate-reducing bacteria by the reaction of hydrogen sulfide to sulfur-oxidizing bacteria by the process of decomposition and binding by various bacteria is the hydration product of various mineral components mainly composed of calcium. Easily dissolves cement, which is an alkaline concrete material. Concrete releases calcium hydroxide as it hardens, and is usually a strong alkali with a pH of 12 or higher, but concrete corroded by hydrogen sulfide lowers its pH.

At present, the main sewer pipes are mainly fume pipes made of reinforced concrete pipes used in large water areas, but due to microbial fermentation, many harmful gases such as hydrogen sulfide are generated in various human bodies. Many kinds of bacteria such as Escherichia coli are mixed together with various gases. This environment is often buried underground and isolated from general life, but the interior of the pipe can often be eroded and brittle due to long-term use. Although rehabilitation and repairs are performed as needed to maintain such pipes, it is not uncommon for hydrogen sulfide concentrations to be measured more than expected just below the manhole installed on the road surface. In the past, there have been many cases where workers who invaded manholes died due to lack of oxygen. In addition, there are many reports that roads are sunk due to aging pipes installed in the past, deterioration of sewer pipes due to sulfuric acid corrosion of reinforced concrete pipes, and damage.

https://www.jswa.go.jp/g/g5/g5m/im/pdf/i7.pdf (concrete corrosion by sulfuric acid) https://www.jiwet.or.jp/examination/%E6%9B%B4%E7%94%9F%E6%8A%80%E8%A1%93-3-4 (rehabilitation / repair technology) Sewage pipeline facility stock management guideline 2016 edition Chapter 1 to Chapter 4 (Japan Sewer Association) https://concrete-mc.jp/concrete-chemical-attack/ (About chemical erosion of concrete) http://library.jsce.or.jp/jsce/open/00064/2009/51-05-0050.pdf (Study on prediction of concrete deterioration due to ozone in sewage treatment plants) https://www.jiwet.or.jp/examination/%E6%9B%B4%E7%94%9F%E6%8A%80%E8%A1%93-3-4 (Japan Sewerage New Technology Organization Repair technology) https://www.jswa.go.jp/g/g4/g4g/pdf/gihyo25.pdf (report on technical evaluation of ozone treatment technology) Concrete anticorrosion practice for water and sewage facilities Morikita Publishing Co., Ltd. Yoshihiro Nonaka, Fumio Mishina

In addition to various wastes, various bacteria also simultaneously flow into the running water in the sewer pipe as waste water.
Representative examples of the bacterium that causes the generation of hydrogen sulfide in the present problem include sulfur-reducing bacteria, and sulfur-oxidizing bacteria that convert hydrogen sulfide into sulfurous acid and sulfuric acid.
As described in Non-Patent Document 1: Corrosion of Concrete by Sulfuric Acid, the change from hydrogen sulfide generated in the pipe can to sulfuric acid causes concrete corrosion to proceed drastically and concrete strength to be remarkably lowered.

Most of the sewer pipes are buried underground, and as a sewage pipe structure, a plurality of resin small-diameter pipe lines are assembled to form a network of medium-diameter pipe lines and large-diameter pipe lines. Since it is buried deep in the ground depth with an inclination angle considering running water, the reconstruction of medium- and large-diameter pipelines has a social impact such as traffic congestion due to the implementation in view of the current social structure. It is said to be impossible due to its size.

After temporarily stopping the running water in the sewer pipe and removing the deposits in the pipe sewer, after performing sprinkling cleaning, it is confirmed that hydrogen sulfide is generated again over time even after ventilation by air blowing. In many cases, it is often the case that the worker's entry exceeds 10 ppm, which is considered dangerous.

Considering the social impact of reconstructing deteriorated, medium- and large-diameter sewer pipes, it is often difficult to re-excavate the buried road surface. The technology of lining the inner surface of the pipe with a new material with high corrosion resistance is implemented by the construction method that has obtained the technical examination of the New Sewerage Technology Organization of Japan. After cleaning the inside of the pipe, the high-concentration hydrogen sulfide inside the pipe is reduced to the specified concentration by atmospheric ventilation, but within a short time before the lining is performed, the concentration of hydrogen sulfide inside the pipe becomes higher than the human dangerous concentration. There are many cases of rising prices.

A large amount of water was consumed in conducting social life, and domestic wastewater including feces and urine, food processing, and water used for industrial purposes were collectively collected as sewage and then various cleaning treatments were carried out at the sewage treatment plant. Although it will later be discharged to rivers, seas, etc., many problems will be raised in the sewage pipes before the sewage reaches the sewage treatment plant. Various nutrients, organic substances, minerals, etc. contained in the sewage flow in the sewer pipe are mixed, and various chemical reactions are routinely generated by indigenous bacteria, but it is fatal to the concrete sewer pipe. The chemical change that causes physical damage is the generation of hydrogen sulfide by sulfur components contained in wastewater and sulfate-reducing bacteria to the production of sulfuric acid by sulfur-oxidizing bacteria. It lowers the strength of the concrete and weakens the built-in reinforcing bar. As a case where hydrogen sulfide is generated again with the lapse of time described in 0009, it is not possible to eliminate the sulfate-reducing bacteria and sulfur-oxidizing bacteria that have been resident in the sewer pipe only by the cleaning work such as high-pressure injection. It's obvious.

After closing the desired section in the sewer pipe section and removing residual water in the pipe section and residual residue in the underdrain using a vacuum pump or an appropriate method, hydrogen sulfide in the sewer pipe space, For the purpose of removing indigenous bacteria, clean water is degassed to a DO value of about 1 ppm using a hollow fiber membrane filter, and then ozone is dissolved at about 10 to 100 ppm. The mist having a particle size that does not satisfy the above conditions is sprayed into the space by the spray device. The mist is for the purpose of expanding the surface area of water containing ozone, and for promptly promoting the reaction with the airborne hydrogen sulfide. In addition, ozone is advantageous in terms of environment because it has a feature that components other than oxygen are not left as a residue after desired sterilization, decomposition and the like.

The purpose is to increase the surface area of water containing ozone, to accelerate the reaction with airborne hydrogen sulfide, and to spray fine powder containing calcium such as calcium hydroxide into the space with compressed air. As a result of the chemical change of (formula 3) to (formula 5), the mist, which has changed hydrogen sulfide to sulfurous acid and sulfuric acid, and calcium hydroxide particles are bound, and is converted to dihydrate gypsum by the neutralization reaction. It falls freely according to gravity, and the concentration of hydrogen sulfide in the sewer pipe space decreases rapidly.

The characteristic of hydrogen sulfide is that it dissolves in water at a high concentration of 2550 cubic centimeters (0.1 mol / L) in 1 liter of water at 20 ° C and 1 atmosphere. As described in (Formula 1) and (Formula 2), the reaction is reversible, and there is a possibility that other ion-bonded sulfide may be formed depending on the conditions.

When hydrogen sulfide reacts with ozone, which is a strong oxidant, the chemical reaction shown in (Formula 5) causes the hydrogen molecule to be oxidized (Formula 3) to change from sulfurous acid (sulfur dioxide) to (Formula 4) sulfuric acid. By spraying particulate calcium hydroxide or calcium admixture in the space while the mist is floating in the space inside the tube, the sulfated hydrogen sulfide is combined with calcium ions, It changes to the dihydrate gypsum shown in and falls freely on the lower surface of the pipe can.

The high-concentration ozone water sprayed into the pipe space reacts not only with the hydrogen sulfide that fills the space but also with the hydrogen sulfide adhering to the surface of the concrete that has been corroded inside the pipe. Its strong oxidizing power and hydroxyl group in the decomposition process of ozone, by-products in the decomposition process such as hydrogen peroxide destroy the cell membranes of sulfate-reducing bacteria, sulfur-oxidizing bacteria and other bacteria and sterilize them in an extremely short time.

A new lining work is applied to the inner surface of the deteriorated sewer pipe to restore the strength and smoothness in the pipe canister, and the sewer flow will not be interrupted, or the sewer pipe life will be improved by repairing the separation point in the pipe canal. Life extension work has been carried out, but the increase in hydrogen sulfide concentration when workers enter the pipe canister during or after a lapse of time will prevent workers' accidents by eradicating the indigenous bacteria in the pipe canister. In addition, when the pipe lining work is carried out without removing the indigenous bacteria, hydrogen sulfide continuously generated in the concrete pipe canal corresponding to the outer cylinder part due to the generation of hydrogen sulfide by the indigenous bacteria. It is possible to prevent the deterioration of the casing due to the generation of sulfuric acid, gypsum dihydrate, and the generation of ettringite.

Ozone molecules contained in ozone water and OH ions generated when ozone water is decomposed destroy the cell membranes of indigenous fungi, oxidize polysaccharides, and cut the polymer structure to cut the inside of the tube. The slime-like substance adhering to the wall surface can be peeled and removed even with a water jet having a relatively low pressure, and the work can be carried out more efficiently.

It is a conceptual diagram of corrosion by hydrogen sulfide in a sewer pipe. It is a partial perspective view of a buried manhole. It is a layout of a gas cleaner in a sewer pipe. It is a general view of a gas cleaner movable part. It is an exploded view of a gas cleaner movable part. It is a reel mount diagram which supplies a gas cleaner cable drive, fluid, and electricity. It is a perspective view from the reel mount fluid supply side. Reel mount A drive system including a servomotor from the gas supply side. It is a drawing of a rope drive unit alone. FIG. 7 is a split ladder diagram for smoothly sliding a rope drive system using rollers and fluid, an electric supply cable, and the like. It is the figure which showed that the water stop plug for sealing the inside of the sewer pipe was foldable. It is the figure which expanded and constructed the water stop plug. It is a water stop plug compression tube figure added to a water stop plug. It is an electric circuit control box figure which contained the electric circuit which implements various controls. It is a fluid introduction manifold figure which receives the fluid supply from the outside. It is a fluid outflow fluid control box figure which controls a fluid based on the command from a control circuit. It is a housing figure which sprays powder based on the command of a fluid control box. It is a result figure which carried out fluid analysis of the characteristic of a powder spray part. It is a device diagram which injects a high-pressure fluid in a mist form according to a command from a fluid control circuit. It is an exploded view of an injection device. It is a supply rotary coupler figure, moving the fluid in the circumferential direction. It is a disassembled conceptual diagram of a rotary coupler. It is a slip ring device for supplying electricity in the orbiting direction. It is a disassembled conceptual diagram of a slip ring. It is a conceptual diagram which removed the reel from the reel mount part. It is a gas sensor conceptual diagram for measuring the gas concentration in a sewer pipe. It is a pulley assembly drawing. It is a pulley disassembly conceptual diagram.

It is impossible to carry in the equipment to carry out the process because the entrance to the aboveground manhole part for entering work into the underground sewer pipe is very narrow, so it is not possible to carry in the equipment for the process, but in the shaft part and the sewer pipe comparatively. It was judged that there was a space allowance and that the assembly of the equipment could be carried out, and it was made easy to disassemble and assemble the equipment of the parts installed on the ground and the movable parts inside the sewer pipe.

Fluids such as ozone water, compressed air, washing water, power supply, and electric wires for communication are provided with separate reel drums, and movable parts in the sewer pipe are installed inside the pipe using the tow line on the ground. This is the result of fearing corrosion of electric motors and the like because the surrounding atmosphere is a dense environment of hydrogen sulfide and sulfuric acid while avoiding supply of large electric power to moving parts.

Regarding tow lines and fluids, a roller-type ladder is provided to prevent deterioration and frictional operation due to friction between the above-ground equipment part and the underground sewer pipe due to friction with the passing part, and the depth of the underground entrance shaft. There is a difference between the two, so the ladder configuration allows free addition.

A fine powder such as calcium hydroxide is sprayed in the sewer pipe, but it is almost impossible to make the powder into a fluid transport tube structure, so a powder tank was provided in the movable part of the pipe. The fine powder spraying device uses Bernoulli's theorem, which is equivalent to spraying, but it is a method in which the fine powder side is sucked to the negative pressure generated by the high-speed fluid with a pressure equivalent to or higher than atmospheric pressure. It is clear that the fine powder solidifies as a result of sucking the air from the surroundings in the high humidity environment generated by the high pressure injection. Therefore, the compressed air supplied from the ground was decompressed, and the dry air set slightly higher than the atmospheric pressure was supplied to realize the smooth atomization by preventing the moisture absorption of the fine powder.

FIG. 1 is a conceptual diagram of corrosion of a sewer pipe cross section, and FIG. 2 is a conceptual diagram of sewer pipe embedding and its embodiment. Figure 2-1 shows the road pavement surface, and Figure 2-2 shows the vertical shaft leading to the underground sewer pipe. Fig. 2-3 shows a sewer pipe, and Fig. 2-4 shows the gas cleaner of the present invention as a target for neutralizing and removing hydrogen sulfide accumulated in the pipe.

Figure 2-5 is to supply electricity, fluid, and tow lines to operate in the sewer pipe of Figure 2-4, and to move forward and backward according to the operating state by the gas concentration signal sent from Figure 26-17. Fig. 6-18-1 Servo motor for driving the cable drive unit for forward and reverse rotation, Fig. 6-19-1 Transmission / reception transmission cable of signals for controlling the electric and fluid supply reel drive servo motor, piping, and tow cable drive unit .

FIG. 2-6 is a cable group of the above-mentioned embodiment 0025.

Figure 2-7 shows the ladder for sliding the tow cable, fluid, and electric cable group.Figure 7-1 shows the structure of the roller for sliding the tow cable on the ladder section and Figure 7-2 roller for the electrical and fluid sliding on the ladder section. It is made up. Figure 2-2 Since the vertical shaft has different depths depending on its location conditions, it is necessary to change the required length of the ladder in Figure 7 as well.

Figure 2-8 shows the manhole entrance, and although there are various sizes in the sewer standard, the smallest entrance diameter is the 60 cm diameter opening, and the entrance shaft is located directly below the entrance. A descent step is laid on the wall. Fig.2-4 Gas cleaner and Fig.2-9 Water plug are required to be introduced and operated from the manhole entrance into the sewer pipe. Fig.2-8 The structure is easy to disassemble and fold. It is as a structure. Details of the water stop plug are shown in FIGS. 11 to 13.

Fig. 2-9 shows a water shut-off plug for sealing the sewer pipe, which is made up of the water shut-off plug constituent plates shown in Fig. 2-9-1 to Fig. 2-9-5. -6 Interconnected by a hinge for opening and closing the water stop plug. Fig.2-9-1 This is an air supply valve for fixing the compression of the water stop plug, which is installed in the groove of the water stop plug. Fig.13-9-7 0.5 to 0.7MPa of the compression tube of the water stop plug By filling the high pressure air of Fig.3, the water stop plug and the sewer pipe can be fixedly connected and sealed. Fig.3-10 The water stop plug reinforcing bar increases the strength and Fig.27-22 Pulley. 4-6-4 Pulling out the tow cable on the outward route and passing through the other pulley, which is also laid in the same way, as shown in Figure 3-6-1 Tow cable along the return route and Figure 2-7 Tow cable, fluid and electric cable group movable ladder Figure 9-18-8 Driven through the drive rope guide roller and is sent out at the same time as being wound up on the reel for drive rope in Figure 9-18-5.

FIG. 4 is a mounting view of the movable portion of the gas cleaner, and is shown as an exploded view of the gas cleaner in FIG. Fig. 4-4-1 and Fig. 4-4-2 are the lower housing plates 1 and 2, and the wheels for moving the main body of Fig. 4-4-5 are attached to the lower surface and are used as the lower base of the gas cleaner main body of Fig. 4. In addition, Fig. 4-4-1 and Fig. 4-4-2 may be descended from the sewer entry manhole pit in Fig. 2-8 with the hinge installed in the aggregate. Fig. 4-4-5 The wheels for moving the main body are a preliminary measure for the situation where the flatness difference between the bottom and the bottom of the sewer pipe is not guaranteed.

Figure 4-4-1 Lower housing plate 1 and Figure 4-4-2 Lower housing plate 2 are assembled or unfolded, and Figure 4-4-9 Housing connection shaft is installed in Figure 4-4-1 Lower housing. Body plate 1 and Fig. 4-4-2 Lower housing plate 1 and Fig. 4-4 -2 Lower housing plate 2 Fig. 4-4-11 Pantograph component plates in the parts that are pre-drilled on both sides Fig. 4-4-1 Lower housing plate 1 and Fig. 4-4-2 Lower housing plate 2 After passing the housing connecting shaft to the inner hole, tighten the nuts and fix it. Fig. 4-4-11 Two pantograph plates are constructed as a set, and bearings are inserted in the bearing and movable parts to rotate with less friction.

Fig. 4-4-11 Screw holes provided in the stepping motor storage box and Fig. 4-12-2 ball nut storage box in the center opening of the pantograph component board where the bearings have been inserted. The bolt is mounted on the shaft portion having. Assemble in the same manner as item 0031 in Fig. 4-3 upper casing plate 1 and Fig. 4-4 upper casing plate 2.

Figure 4-11 is an electric circuit control box, which has a group of electrical peripheral connectors and is connected to the electrical peripheral wiring group of Figure 6-6-2. Although not shown inside, a sequencer, stepping motor driver, Fig. 4-4-10 Case position detection limit switch, assembly completion switch, and distribution board are built in, and the power required by each part is supplied. We are distributing.

Figure 4-4-7 is a posture stabilizing wheel that functions to stabilize the posture of the moving parts of the gas cleaner by pushing pneumatic tires against the inner wall of the sewer pipe. Fig. 4-4-7 After the assembly of the gas cleaner mount is completed for the posture stable wheel, a signal is input from the assembly completion switch, and the signal is transmitted to the external control box in Fig. 29. Fig. 4-6 from the external control box in Fig. 29 -2 From the electrical wiring group Fig. 4-11 Although not shown in Fig. 4-4-10, the limit switch for detecting the chassis position is shown in Fig. 4-4-3. 1 and Fig. 4-4-4 Lower the height of the upper mount stage composed of the upper casing plate 2 until the limit switch for casing position detection in Fig. 4-4-10 operates. Figure 29 The external control box stores its position in the sequencer memory built into the external control box. Fig. 4-4-5 Offset values of wheels for moving the main body are stored in advance in the memory. Fig. 29 Fig. 29-xx provided in the external control box. Enter the measured diameter of the sewer pipe on the touch panel. Fig. 4-4-7 Until the posture stabilizing wheel matches the center of the sewer pipe in Fig. 3-3. Raise the mount stage.

Fig. 4-11 Built-in stepping motor driver reaches the specified position Fig. 4-12 Built-in Fig. 5-12-4 When the specified amount of pulses is sent to the stepping motor, it becomes an end signal internally, and Fig. 4-4 -8 Signal to move the piston rod to the air cylinder for posture stabilization wheel drive is transmitted from the electric circuit control box to the fluid control box as an electric signal from the electric circuit control box, and the corresponding solenoid valve is driven. -8 Posture stability wheel drive Air cylinder Piston rod is moved forward to drive Fig. 4-4-6 Posture stabilization wheel swing arm and Fig. 4-4-7 Posture stabilization wheel is pressed against the center point of the inner surface of the sewer pipe. Get stable posture.

Fig. 4-13 is a fluid introduction manifold, which is connected to Fig. 4--6-3, supplies the necessary fluid from the fluid-related supply pipe group of Fig. 6-6-3, and is required inside Fig. 4. Converted to soft tube or metal pipe.

Fig. 4-14 shows a fluid control box, which has a solenoid valve, a pressure regulator, and a pressure switch, which are not shown in the figure. The electric power and control signals required inside are supplied from the electric circuit control box in Figure 4-11, and the fluid to be controlled is supplied from the piping converted by the fluid introduction manifold in Figure 4-13.

Figure 4-15 shows the distance sensor, which is installed before and after the gas cleaner mount. There are multiple options for the type of distance sensor, including infrared, ultrasonic, and laser options. As a reason for installing the distance sensors in the front and rear, Fig. 2-9 Water stop plug is installed at the leading edge of the stroke, and Fig. 4-6-4 Outgoing tow line Fig. 6-18-1 Drive unit unit drive The servo motor is started based on the external control box command, and the electric / fluid supply reel drive clutch is released as shown in Figure 6-19-4, and the vehicle moves forward to approach the water stop plug. Figure 4-15 shows the distance sensor transmits the signal to the external control box in real time about the distance from the water stop plug. The approach limit distance is set in the external control box, and the gas cleaner mount section stops moving forward at the set value. The reel mount section is shown in FIGS. The detailed structure is shown in FIGS.

If hydrogen sulfide is defined as having an air specific gravity of 1, hydrogen sulfide has a specific gravity of 1.19. Normally, the sewer pipe is buried with a slight inclination in order to utilize the natural flow, and the device of the present invention has its main purpose of neutralizing and removing hydrogen sulfide. It is efficient to execute the process from the part.

Fig. 4-14-xx When the gas cleaner mount stops advancing, Fig. 4-14-xx starts injection of ozone water from the injection nozzle. Details are described in FIGS. 19 and 20. Fig. 19-xx Ozone water with a concentration of 10 to 100 ppm that has been compressed higher than that of Fig. 19-xx is supplied and compressed by the Fig. 20-14-xx spring tension adjusting screw. When the pressure on the ozone water side becomes high, the ozone water mist that has become more mist than the one in Fig. 20-14-xx from the tip of Fig. 2014-xx diffuses from the tips of multiple injection ports and fills the space. . The injection nozzle is shown in FIGS.

At the same time, from Fig. 4-16-1 to Fig. 4-16 Fig. 17-16-9 The powder to be sprayed is sucked from the Fig. 17-16-4 powder inlet tube, and Fig. 18 shows the ejector simulation result principle. Based on the high-speed injection based on Fig. 18-16-6, the high-speed powder is diffused into the sewer pipe with the diffusion angle at the outlet. Figure 17-16-9 The powder to be sprayed is a fine particle powder, and the ozone water mist at the destination where it floats in the space for a long time oxidizes hydrogen sulfide and changes to sulfurous acid and sulfuric acid. Since the powder is an alkaline substance such as calcium hydroxide, the chemical reaction of (Formula 4) is established with the sulfuric acid mist, and as a result, it changes to dihydrate gypsum. Figure 2-3 The hydrogen sulfide concentration in the sewer pipe falls after falling into the sewer pipe in a short time.

Fig. 17-16 is a conceptual diagram of powder spray perspective, and Fig. 16-16-9 is a fine powder of calcium hydroxide, etc., and the chemical reaction with sulfuric acid in the chemical changes from (Formula 3) to (Formula 5). The material that produces gypsum dihydrate as a reaction is stored in Figure 7-16. Figure 7-16-1 shows a powder injection nozzle that sprays fine powder with high pressure air. While the device of the present invention is operating, the mist containing ozone sprayed from Fig. 4-14-2 fills the space, and Fig. 17-16-7 and Fig. 17-16-8 are stored. 9 Calcium hydroxide absorbs moisture, and sulfuric acid mist is applied with a pressure slightly higher than atmospheric pressure to prevent it from entering the case and solidifying. The reason is that high pressure air is supplied to the inside of the powder introduction pipe in Fig. 18-16-4 from the ejector simulation result diagram in Fig. 18-16-2 to create a high-speed flow. According to Bernoulli's theorem when passing through the body mixing point, the velocity exceeds sonic velocity and the pressure is 560m or more per second and the pressure is 0.055MPa. Figure 17-16-4 The internal pressure of the powder introduction pipe is 0.09MPa, and the inside of the fine powder accumulation tank is definitely hidden. It is certain that it will become a pressure and that gas and mist will be sucked from the surrounding atmosphere, and in order to prevent that suction, pressure is applied to the inside of the fine powder accumulation tank at a pressure higher than atmospheric pressure by about 0.1 MPa, gas and powder from the outside , Moisture is prevented from entering the fine powder storage unit.

Apart from the result of (Chemical Formula 5) combined in the space, the surplus reactant in (Chemical Formula 4) left Item 4 Ozone also adheres to the inner wall surface of the sewer pipe as a mist. Reacts with sulfur-reducing bacteria and sulfur-oxidizing bacteria remaining in the space, ozone changes its composition and changes into OH and hydrogen peroxide during ozonolysis process, destroys bacterial cell membranes in the process of sterilization do. Eventually, ozone changes to oxygen and loses its strong oxidizing power, but as a side effect, it is possible to remove a considerable amount of the bad odor that fills the sewer pipe in Figure 2-3.

Fig. 4-17 shows the gas sensor assembly, and details are shown in the gas sensor perspective view of Fig. 26. Figures 26-17-2 to 26-17-4 are gas sensors. Three types of detection gas, hydrogen sulfide, ozone, and oxygen, are detected and transmitted to the external control box in real time, and the hydrogen sulfide concentration set in the external control box is detected. The value is constantly monitored and the values of all gas concentrations are displayed as numbers on the touch panel display. When the number becomes lower than the set hydrogen sulfide concentration, the external control box issues a signal for moving the gas cleaner movable part shown in Fig. 4 to the reel mount part shown in Fig. 6.

When a movement signal is issued, an activation signal is sent from the external control box to the servo motor for driving the cable drive unit in Fig. 6-18-1 and the servo motor for driving the electric and fluid supply reels in Fig. 6-19-1. Is the servomotor rotation in the opposite direction. Fig. 4-6-1 Tension is applied to the forward tow line and Fig. 4 Gas cleaner movable part moves backward. In addition, Fig. 4-6-2 Electric wiring group, Fig. 4-6-3 Fluid-related supply wiring group rotate in the winding direction, and Fig. 6-19-4 Electric and fluid supply reel drive clutch is connected and pulled out. Figure 6-6-2 Electricity-related wiring group and Figure 6-6-3 Fluid related supply piping group pull back and wind up. When the concentration becomes higher than the hydrogen sulfide concentration specified value set in the external control box, the above operation is stopped and the operation is repeated between item 0044 and the above. The moving distance is also displayed as the current position on the external control box touch panel display.

When item 0044 and item 0045 are repeated, the starting point where the assembly is carried out is gradually approached. At this point, the need for a distance sensor, shown in Figure 4-15, installed at the rear arises. It is the same as Fig. 2-9, and has a structure in which the area of the movable parts such as the tow lines, electrical wiring groups, and fluid-related supply piping groups shown in Fig. 3-6-1 to Fig. 3-6-4 is divided below. If a water stop plug is laid at the start point, the method of removing hydrogen sulfide in an almost sealed environment and the distance between the vertical shaft in Fig. 2-2 and the rear surface of the connection part of the sewer pipe in Fig. 2-3 are It is possible to set on the touch panel of the external control box whether the operation of the movable part of the gas cleaner shown in FIG. 4 is ended or the operation is ended in a completely sealed state with water blocking plugs installed in front and back.

It is needless to say that a bypass should be installed between the work section before and the current work section in order to prevent the sewer sewage from flowing into the work section when the sewer pipe work is normally carried out. Therefore, there is a water stop plug at the end of the sewer pipe before the work section, and what distance can be calculated by adding the distance on the touch panel of the external control box when the distance sensor operates. Whether to stop the operation can be easily selected.

Figure 2-3 Hydrogen sulfide removal in the sewer pipe is a corrosive state in which bacteria have been generated over a long period of time in the natural environment, but the hydrogen sulfide removal process according to the present invention has occurred in the natural environment. Accumulation of dihydrate gypsum naturally adhering to the wall surface in the pipe will carry out its chemical reaction in an extremely short time, but the surface of the cement itself remains alkaline and maintains its strength. Since the oxidation process using ozone water may cause the inner wall of the sewer pipe to be slightly exposed, after the series of processes, the type of water used for the spray mist is changed to alkaline water with a pH of 12 or more and the process is increased by one more process. It is desirable to use a different process. Therefore, the piping for supplying alkaline water is included in the piping of the fluid system piping group in Figure 2-6-3. By adding this process, it is possible to maintain the soundness of the cement surface.

In the method and treatment device for removing hydrogen sulfide and indigenous bacteria in the sewer pipe and the agricultural wastewater pipe accompanying the sewer rehabilitation / repair according to the present invention, from the outside to the execution of electricity, As the fluid, compressed air is required to be 0.7 MPa to 1 MPa, ozone water supply device capable of changing the concentration of 10 to 100 ppm, alkaline water having a pH of 12 or more, and an external supply device capable of delivering at 5 to 10 MPa in the pump.

Although it is not generally regarded as important as the basis of society at present, sewerage is extremely important in supporting the prosperity of society at present, but if management and maintenance of sewerage is neglected, it is everywhere in modern society. It is obvious that the sewage overflows and filth accumulates. In addition, there are now many cases of sudden heavy rain, but the fact that a large amount of precipitation is processed is a result of sufficient sewer maintenance and maintenance, and good sewer-related maintenance is a social stability. Support dynamic development.

1 Earth paved surface
2 Manhole shaft
3 sewer pipe
4 Gas cleaner moving part
4-1 Lower housing plate 1
4-2 Lower housing plate 2
4-3 Upper housing plate 1
4-4 Upper housing plate 2
4-5 Wheels for moving the body
4-6 Posture stable wheel swing arm
4-7 Posture stabilizing wheel
4-8 Pneumatic cylinders for driving posture stable wheels
4-9 Casing connection shaft
4-10 Limit switch for case position detection
4-11 Pantograph component board
5 Tow line, fluid, electric cable drive unit mounting plate
6 Towline, fluid, electrical cable group
6-1 Forward tow line
6-2 Electric wiring group
6-3 Fluid related supply piping group
6-4 Forward tow line
6-5 Upper and lower clamp rollers for tow line
6-6 Upper and lower clamp rollers for electric and fluid
7 Towline, fluid, electric cable group Movable ladder
7-1 Roller for sliding rudder tow line
7-2 Ladder part Electric and fluid sliding roller
8 Sewer entry manhole pit
9 Water stop plug
9-1 Air supply valve for compression fixing of water stop plug
9-2 Water stop plug component plate 1
9-3 Water stop plug component plate 2
9-4 Water stop plug component plate 3
9-5 Water stop plug component plate 4
9-6 Hinges for opening / closing the water stop plug
9-7 Water stop plug mounting groove
9-8 Water stop plug compression tube
11 Electric circuit control box
11-1 Electrical connector group
12 stepper motor storage box
12-1 Ball screw
12-2 Ball nut storage box
12-3 Ball nut
12-4 Stepping motor
13 Fluid introduction manifold
13-1 One-touch connector for fluid introduction connection
13-2 Gas cleaner internal piping connector
14 Fluid control box
14-1 Electrical connector for fluid control box drive
14-2 Fluid introduction connector in the housing
14-3 High pressure fluid output connector
14-4 Output connector for powder spray
14-5 Decompression air connector
14-6 Compressed air output connector
14-7 injection nozzle
14-8 Injection fluid introduction connector
14-9 Spring tension adjusting screw
14-10 Tension bolt lock nut
14-11 Spring retainer base
14-12 O-ring
14-13 Tension spring
14-14 Liquid jet plunger
15 distance sensor
16 powder spray box
16-1 Powder injection nozzle
16-2 High pressure air passage
16-3 Decompression chamber
16-4 Powder introduction tube
16-5 High pressure air, powder mixing point
16-6 High-speed powder diffusion outlet
16-7 Low pressure air supply port
16-8 Low pressure air supply pipe
16-9 Powder to be scattered
17 gas sensor box
17-1 Water and powder removal filter
17-2 Constant potential gas sensor 1
17-3 Constant potential gas sensor 2
17-4 Constant potential gas sensor 3
17-5 Fan for introducing air into the sensor box
18 Cable drive unit
18-1 Servo motor for cable drive unit drive
18-2 Servo motor shaft coupling for driving the cable drive unit
18-3 Cable drive unit Planetary gear
18-4 Rope drive unit small timing pulley
18-5 Cable drive reel
18-6 Large timing pulley for rope drive
18-7 Timing belt for rope drive
18-8 Drive rope guide roller
19 Electric and fluid supply reel mount
19-1 Electric and fluid supply reel drive servo motor
19-2 Electric / Fluid Supply Reel Drive Servo Motor Shaft Connection Coupling
19-3 Electric and fluid supply reel drive planetary gear
19-4 Electric and fluid supply reel drive clutch
19-5 Electricity, fluid supply reel drive small timing pulley
19-6 Fluid supply reel
19-7 Electric supply reel
19-8 Electric and fluid supply reel drive large timing pulley
19-9 Cable, hose guide roller
19-10 Reel lower guide roller
20 Slip ring external housing
20-1 Fixed side power supply port
20-2 Slip ring leaf spring group
20-3 Slip ring contact brush group
20-4 Slip ring fixed side core
20-5 Slip ring group
21 Rotary coupler External housing
21-1 Rotary coupler fixed side core
21-2 Rotary coupler fluid supply port
21-3 Rotary coupler fluid outlet
21-4 O-ring group for separating adjacent slits
22 pulley
22-1 Pulley lid
22-2 Pulley shaft
22-3 Pulley bearing
22-4 Pulley assembly base

Claims (5)

It is a device that can remove hydrogen sulfide generated in the sewer pipe by sulfate-reducing bacteria, etc. for a short time and without any person. It does not exhibit reversible chemical changes after removal of hydrogen sulfide (chemical formula 1) ~ ( Chemical formula 4) This is a process to carry out a chemical change, which is characterized by the rapid neutralization and removal of hydrogen sulfide in the sewer pipe space and the sterilization of bacteria such as sulfate-reducing bacteria and sulfur-oxidizing bacteria. apparatus. If the specific gravity of the atmosphere is 1, the specific gravity of hydrogen sulfide is 1.19. Solubility in water dissolves at a high concentration of 2550 cubic centimeters (about 0.1 mol / L) in 1 liter of water at 20 ° C and 1 atmosphere. In carrying out (Chemical Formula 1) to (Chemical Formula 4), ozone water is sprayed in the range of 10-200 micron particle size that does not become a dry mist to strongly oxidize hydrogen sulfide, while calcium hydroxide etc. is sewered. By spraying fine powder into the pipe, the mist containing fine particles of ozone and ozone are matched, and while free fall in the sewer pipe space, the ozone water changes the sulfuric acid that has changed from hydrogen sulfide through sulfurous acid. A device that is characterized by neutralizing with calcium hydroxide. When removing the hydrogen sulfide in the sewer pipe, during operation of the apparatus of the present invention, the atmosphere containing hydrogen sulfide, ozone, sulfuric acid, oxygen 21% nitrogen 78% is mixed in the internal space. It is dangerous for a worker to enter the sewer pipe during operation of this equipment, but the atmosphere in the sewer pipe is sucked in, and the oxygen, ozone, and hydrogen sulfide concentrations are measured and monitored by sensors, A device characterized by displaying on a display and moving the operating location by a drive device installed on the ground as the removal device changes as the hydrogen sulfide concentration changes. Normally, a manhole is laid when entering the sewer pipe for work, but the entrance of the manhole is generally a narrow opening, and it is defined as 60 cm as the minimum diameter when personnel can enter. However, it is impossible to carry in the device for carrying out the above-mentioned claims 1 to 3, and in the present invention, the carrying device in the aboveground installation part and the sewer pipe is divided, and easily disassembled and assembled. A device having a mechanism having the features that enable the above-mentioned claims 1 to 3 to be performed in a short time. When claim 1 to claim 3 are carried out, a strong oxidizing action due to ozone occurs due to neutralization of alkaline hydrogen sulfide in the sewer pipe, and it is sprayed at the same time with the change to sulfurous acid and sulfuric acid. The neutralization work process is completed in the form of gypsum dihydrate due to the generation of salts with alkaline substances such as calcium hydroxide, and at the same time, the unreacted mist of ozone water adheres to the inner wall surface of the pipe canal and inhabits it. The cell membrane is destroyed by the active hydroxyl groups and hydrogen peroxide that are generated in the process of changing ozone into oxygen for fungi, and the cells die. At the same time, the inner surface of the sewer pipe is also subjected to an oxidizing action at the same time, which may lead to a decrease in cement strength. Therefore, spray an alkaline aqueous solution with a pH of 12 or more on the cement surface to restore the alkalinity of the cement surface. This is a device with the feature that enables the maintenance of sewer pipe strength.