KR102232004B1 - Trenchless rehabilitation method using low energy curing system - Google Patents

Abstract

The present invention relates to a non-excavation pipe repair method using a low-energy curing system which forms a valve and a bypass pipe on an air compressor to selectively produce low-temperature and high-temperature compressed air and reduce needed energy by reducing required power by the air compressor designed to be a low-pressure type, and includes a superheated steam unit and a control unit to prevent creation of a large quantity of condensate water and reduce the energy required for steam production by reducing steam usage through humidity control. A low-pressure air compressor is used to reduce the power required to produce compressed air of the same flow and a bypass is formed to use high-temperature compressed air in steam curing to reduce operating power and reduce creation of condensate water and energy loss caused by mixing low-temperature compressed air and high-temperature steam. The creation of condensate water can be reduced through humidity control to prevent non-curing of tubes and reduce steam usage to have the effect of reducing the energy required for steam production. An air-water separator is embedded in the superheated steam unit to remove condensate water in steam without heat loss. The inside has a multi-grid structure to maximize heating efficiency, and the outer wall is insulated and finished to minimize heat loss.

Description

Trenchless rehabilitation method using low energy curing system {Trenchless rehabilitation method using low energy curing system}

The present invention relates to a method of repairing aging water and sewage pipes by non-drilling, and in more detail, by forming a valve and a bypass pipe in an air compressor, selectively producing low-temperature and high-temperature compressed air, and a low-pressure type air compressor. As a result, the required energy is reduced by reducing the required power, preventing the generation of a large amount of condensed water by configuring the superheated steam unit and the control unit, and reducing the steam consumption through humidity control, a low-energy curing system that can reduce the energy required for steam production. It relates to a non-excavation repair method using a pipe.

In general, there is a method of replacing or partially repairing old pipes with new pipes by excavating the ground where pipes are buried in order to repair aging water and sewage pipes and industrial pipes such as gas, electricity, and communication. .

The method of replacing or repairing the above ground by excavating the ground with a new pipe is to damage the surrounding environment and to cause ground subsidence due to erosion of the soil after the construction is completed, as well as traffic congestion and pedestrians in the crowded urban area. There is a problem that causes civil discomfort, such as that.

As described above, as the enormous construction cost due to the excavation work, the increase in traffic congestion, the occurrence of safety accidents, and the increase in social loss costs such as environmental problems, a non-drilling overall repair method was developed as an alternative, and various construction methods are being applied.

Among the above-described non-drilling repair methods, the CIPP (cured in place pipe) is a representative water and sewage non-drilling repair method. It performs preliminary preparation work for aging pipes, and makes impregnated tubes and inserts and hardens the impregnated tubes. And after cooling, it is finished as a finishing operation.

In the field hardening pipe construction method, a curable resin is impregnated in the cut tube according to the length of the maintenance pipe and the extra length of each construction method, and after inserting the tube into the maintenance pipe, heat is applied to harden it, and the end of both ends and the connecting pipe are drilled. At the end of the process, the thermally cured CIPP is gradually cooled to room temperature to minimize cracking and shrinkage. At this time, when the air compressor has the same power, the higher the discharge pressure, the lower the discharge flow rate.

On the other hand, if the hardening work is performed using only 100% of the steam discharged from the steam boiler without using the compressed air discharged from the air compressor, the steam is liquefied due to the temperature difference between the steam heat and the inside of the pipe, thereby generating a large amount of condensate to block heat transfer. Therefore, it takes a long time for uncuring and curing work, the construction quality is deteriorated due to the uncuring, and the cost of reconstruction is excessive, and the nearest place to which steam is supplied is high heat, causing the waterproof layer film to swell. However, due to the long curing time, there is a problem of excessive use of fuel and excessive emission of carbon dioxide.

As a prior art related to the non-drilling repair method as described above, the front part of the tube inserted into the inside of the old tube is securely fixed inside the tube pulling device in the shape of a hopper according to Korean Patent Registration No. 10-1455611. After the tube is folded inward so that it can be pulled in the direction of the outlet of the tube, a hole is drilled so that the fixing bolt can be inserted into the tube, and the fixing bolt is fixed using a fixing frame and a nut so that the tube remains on the inner wall of the pipe. It is equipped with a dry heat device that only supplies dry heat obtained by heating air without condensed water inside the tube with steam after the traction work is completed, minimizing the generation of condensate and curing work in an early time. A water and sewage pipe non-excavation hardening method and a hardening device are disclosed to complete the water and sewage pipes. In addition, in the case of non-excavation repair work in Korean Patent Publication No. 10-1993404, a predetermined temperature and pressure are mixed with steam and compressed air in advance. Constant-temperature static pressure type tube liner lining device for repair of non-excavated water and sewage system that automatically adjusts the temperature and pressure inside the tube liner during hardening work using a software program and automatically adjusts the temperature and pressure inside the tube liner, and water and sewage using the same. A non-drilling repair method is disclosed. In addition, in Registered Patent Publication No. 10-1561993, compressed air and steam are repeatedly circulated through the first circulation device, the dry-humid heat heating device, and the second circulation device. A dry and wet heat device and method using compressed air that generates dry and wet heat consisting of only compressed air without any moisture and supplies it to the inside of the tube installed inside the water and sewer pipe to quickly perform the curing work of the tube are disclosed. .

However, the above-described conventional techniques use a mixer to mix compressed air and steam, or generate dry and wet heat consisting of only compressed air without moisture at all to quickly perform the hardening work of the impregnated tube, whereas the present invention has a lattice structure inside. It is composed of, and a heater is installed in each compartment to generate superheated steam, and a partition wall and a baffle plate are installed in the internal flow path to induce fluid mixing, increase the heating efficiency by the heater, and minimize the pressure and heat loss by minimizing the piping structure. The superheated steam with the outer wall insulated and finished is formed, and the superheated steam mixed with compressed air and steam is introduced into the impregnating tube to complete the hardening work.

As described above, in the conventional hardening method, the required power of the air compressor is consumed a lot, resulting in a large energy loss, and energy loss generated when mixing low temperature compressed air and high temperature steam and forming a water film prevents heat transfer. To reduce the generation of condensate, the purpose is to provide a non-excavation repair method for pipes using a low-energy curing system configured to reduce the problem of impregnating tubes not being hardened by controlling humidity.

As a solution to the non-excavation repair method using the low-energy curing system of the present invention, in order to repair the old conduit, insert the impregnated tube into the inner side of the conduit without excavation and construct a system for curing, generating compressed air. An air compression unit 10 and a steam boiler 20 that generates steam, and a superheated steam unit that receives and mixes and heats the compressed air generated by the air compression unit 10 and the steam generated by the steam boiler 20 (30) and the impregnation tube (40) in the conduit (300) for introducing the superheated steam generated by the superheated steam (30) to one side and the discharger (50) for discharging the end point by connecting to the other side of the impregnating tube (40) ) And a control unit 90 for controlling the progress status.

The air compression unit 10 is composed of an air inlet filter 11, an air compressor 12, an oil separator 13, an air cooler 14, an oil cooler 15, and a controller 80, and the air inlet The air introduced through the filter 11 is introduced into the air compressor 12, and the compressed air compressed through the air compressor 12 moves to the oil separator 13, and the compressed air and oil in the oil separator 13 The separated oil at the bottom is cooled by the oil cooler 15 and then moved back to the air compressor 12 for reuse, and the separated compressed air at the top is inlet pipe 18 by the bypass valve 16. Then, it moves to the air cooler 14 or moves to the superheated steam unit 30 along the bypass pipe 19.

The bypass valve 16 is applied when the air cooler 14 and the oil cooler 15 are integrated, and when the air cooler 14 and the oil cooler 15 are separate types, the controller 80 uses the air cooler ( 14) is controlled to allow compressed air to pass.

The inside of the superheated steam unit 30 is formed in a multi-grid structure of 8 to 20, and heaters 34 are formed therein to maintain a constant heating temperature, and when viewed from the side, the steam is injected to the upper right. A steam inlet pipe 31 is formed, an air inlet pipe 33 is formed to inject air to the lower left, and a superheated steam discharge pipe 32 is formed to discharge superheated steam mixed with steam and air in the middle of the left. do.

In addition, the steam separator 35 is built inside the superheated steam unit 30 to minimize heat loss and efficiently remove the condensed water in the steam.

In the superheated steam unit 30, an overheated steam hygrometer, a flow control valve, a flow meter, and a controller may be added to determine the exact value of humidity and flow rate, and the superheated steam unit 30 is more precisely controlled by controlling the valve by a controller. It is desirable to configure it to control.

In addition, a baffle plate is installed inside the multi-grid structure of the superheated steam part 30 to increase mixing and heating efficiency, and the outer wall of the superheated steam part 30 is thermally closed to minimize heat loss. Can be optimized.

The method of inserting and hardening the impregnated tube 40 into the conduit 300 to be repaired without excavating the underground to repair the aging conduit 300 using the system 1 configured as described above is the tube insertion step. It consists of an expansion step, a temperature rise step 1, a temperature rise step 2, a temperature maintenance step 1, a temperature maintenance step 2, and a cooling step.

Specifically, the tube insertion step of inserting the impregnated tube into the aging pipeline by the reversing method and the traction method, the expansion step of attaching the impregnated tube to the aging pipeline with low temperature and low pressure compressed air using an air compressor, and an air compression unit and The bypass valve produces high-temperature compressed air, flows into the superheated steam, operates the first-stage heater to raise the temperature, and then injects it into the impregnating tube to raise the temperature while maintaining the pressure. Step 2 of heating the steam into the superheated steam and operating the second-stage heater to produce superheated steam and injecting it into the impregnated tube; and maintaining the temperature to maintain the curing temperature by generating superheated steam by mixing and heating compressed air and steam 1 Step 2 maintains the temperature and reduces the amount of steam while maintaining the pressure and temperature, controlling humidity, and shutting off the steam injection and operating an air cooler for compressed air to produce compressed air at room temperature to create a thermally cured impregnated tube with only compressed air. It comprises a cooling step of gradually cooling to room temperature.

As described above, the method using a pipe-less excavation hardening system consisting of a tube insertion step, an expansion step, a heating step 1, a heating step 2, a temperature maintenance step 1, a temperature maintenance step 2, and a cooling step is used for hardening of the impregnated tube in the existing method. Since the amount of steam less than the amount of steam is required, energy can be drastically reduced.

The pipeline non-drilling repair method using the low-energy curing system of the present invention uses a low-pressure air compressor to reduce the power required to produce compressed air with the same flow rate, and forms a bypass to reduce operation power because high-temperature compressed air is used for steam curing. It can reduce energy loss and condensate generated by mixing low-temperature compressed air and high-temperature steam, and reduce the generation of condensed water through humidity control, thus preventing the tube from being uncured and reducing steam consumption at the same time. Therefore, there is an effect of reducing the energy required for steam production.

In addition, a steam separator is built into the superheated steam to remove the condensed water in the steam without heat loss, and the inner side has a multi-grid structure to maximize the heating efficiency, and the outer wall is formed with an insulating finish to minimize heat loss. It works.

1 is a block diagram of a pipe line non-excavation repair method using a low-energy curing system according to the present invention.
Figure 2 is a general system configuration diagram of the pipeline non-excavation repair method using the low-energy curing system of the present invention.
Figure 3 is a block diagram of the air compressor of the non-excavation repair method using the low-energy curing system of the present invention.
Figure 4 is a block diagram of the air compression unit in another embodiment of the pipe non-excavation repair method using the low-energy curing system of the present invention.
5 is a block diagram of a superheated steam part of the non-excavation repair method of a pipe using a low energy curing system according to the present invention.
Figure 6 is a side view of the superheated steam portion of the pipe non-excavation repair method using the low-energy curing system of the present invention.
Figure 7 is a view showing a graph of the amount of steam in the pipeline non-excavation repair method using the low-energy curing system of the present invention.
Figure 8 is a flow chart of the pipeline non-excavation repair method using the low-energy curing system of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and in the following description of the present invention, when it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the subject matter of the present invention. Detailed description thereof has been omitted.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, the definition should be made based on the contents throughout the present specification.

1 is a configuration diagram of the present invention, Figure 2 is a general system configuration diagram of the present invention, Figure 3 is a configuration diagram of an air compressor of the present invention, Figure 4 is a configuration diagram of an air compression unit in another embodiment of the present invention 5 is a configuration diagram of the superheated steam unit of the present invention, Fig. 6 is a side view of the superheated steam unit of the present invention, Fig. 7 is a view showing a vapor amount graph of the present invention, and Fig. 8 is a flow chart of the present invention,

When described in detail with reference to FIG. 1,

It is a diagram showing the system (1) in the pipeline non-excavation repair method using the present inventors low energy curing system. The system 1 forms an air compression unit 10 from the left, and the air compression unit 10 is connected to the superheated steam unit 30. In addition, a steam boiler 20 is connected to the superheated steam unit 30.

The superheated steam unit 30 is connected to the impregnated tube 40 inserted into the conduit 300, and the impregnated tube 40 is connected to the discharger 50. In addition, a control unit 90 is additionally configured in the system 1.

Compressed air generated by the air compression unit 10 is inserted into the conduit 300 in reverse insertion and expansion, hardening and cooling processes of the impregnated tube 40 inserted into the conduit 300 to be repaired. It is used as a pressure source that adheres to it and a heat medium that transfers heat.

Compressed air generated by the air compression unit 10 is injected into the superheated steam unit 30. In addition, the steam generated by the steam boiler 20 is also introduced into the superheated steam unit 30.

The compressed air and steam injected as described above are introduced into the superheated steam unit 30 to maximize heating and mixing effects. In addition, a steam flow meter is additionally formed in the superheated steam unit 30 to use the steam quantitatively under the control of the control unit 90, and a humidity sensor is additionally formed in the superheated steam unit 30 to receive the control of the control unit 90. Humidity can be maintained adequately.

Compressed air and steam heated under the control of the controller 90 are generated as superheated steam and used for hardening of the impregnated tube 40. The superheated steam is quantitatively and appropriately maintained by the control unit 90. The superheated steam is injected after measuring pressure, temperature, and humidity by a pressure sensor, a temperature sensor, and a humidity sensor additionally configured in the superheated steam unit 30 before being introduced into the impregnating tube 40.

In the superheated steam unit 30, the amount of compressed air generated by the air compression unit 10 and the amount of compressed air generated by the steam boiler 20 is generated by the control of the control unit 90 in accordance with each step of the pipeline non-excavation repair method. To adjust the amount of steam to be injected.

As described above, the superheated steam injected into the impregnating tube 40 is used for hardening of the impregnated tube 40 and discharged through the discharger 50 located at the end point.

When the old pipe line 300 is repaired by the system 1 as described above, the air injected into the superheated steam unit 30 is preheated as a whole around the starting point, so that the steam injected into the superheated steam unit 30 is in a low-temperature environment. It can prevent exposure and the formation of large amounts of condensate. When a large amount of the condensed water is generated, a large amount of condensed water is mixed with the superheated steam introduced into the impregnating tube 40, so that a water film is formed to prevent heat transfer, thereby causing a serious problem that the impregnated tube 40 is uncured.

In addition, since the humidity is controlled by the control unit 90, the amount of steam used for curing can be reduced by about 30% or more compared to the existing technology, so that the energy generating steam can be reduced.

In addition, it is preferable to include a water separator 35 inside the superheated steam unit 30, which can efficiently remove condensed water in the steam while minimizing heat loss.

When described in detail with reference to FIG. 2,

Unlike the system 1 of the present invention of FIG. 1, the general system 200 is shown, and the air compressor 10 is connected to the mixer 70. In addition, the steam boiler 20 is connected to the brackish water separation unit 60, and the brackish water separation unit 60 is connected to the mixer 70. Therefore, at one side of the mixer 70, the air compressor 10 and the brackish water separator 60 are connected together.

In addition, the mixer 70 is connected to the impregnating tube 40 inserted into the conduit 300, and the impregnating tube 40 is connected to the discharger 50.

In the case of traction insertion, the general system 200 pressurizes and expands the impregnated tube 40 using compressed air generated by the air compressor 10 to perform a pressing step of intimate contact with the pipe line 300, and the end point The phosphorus discharger 50 is opened to discharge compressed air, while at the same time gradually reducing the input amount of compressed air and gradually increasing the amount of steam generated by the steam boiler 20 to increase the temperature while maintaining the pressure. In order to maintain the pressure and the amount of compressed air and steam, a maintenance step is performed to control the amount of discharged in the discharger 50, which is the end point, and the input of steam is blocked, and the heat-cured impregnated tube is gradually cooled to room temperature with only compressed air. Carry out the cooling step.

Since the general system 200 measures only temperature and pressure and controls the input amount of compressed air and steam using a manual valve, some of the steam is lost in the transfer pipe and is also consumed for increasing the temperature of the compressed air, and some of it is impregnated. The hardening and impregnation of the tube 40 is lost through the conduit 300 and the soil adjacent to the tube 40, and a part is discharged through the discharger 50 which is the end point.

As described above, the general system 200 consumes a lot of steam compared to the system 1 of the present invention, so energy consumption is increased, and the amount of condensate is generated so that the hose in the impregnation tube must be inserted to continuously discharge it. Condensed water forms a water film, causing energy consumption and uncuring by re-evaporation.

When described in detail with reference to FIG. 3,

1, the air compression unit 10 has an air inlet filter 11 connected to the air compressor 12, and the air compressor 12 is an oil separator 13 The oil separated at the bottom of the oil separator 13 moves to the oil cooler 15, and the oil cooled in the oil cooler 15 returns to the air compressor 12 and is reused.

The separated air at the top of the oil separator 13 moves along the inlet pipe 18 or the bypass pipe 19 by the bypass valve 16. The inlet pipe 18 is connected to the air cooler 14 to cool and discharge the air, and the bypass pipe 19 is discharged directly without passing through the air cooler 14.

When the air cooler 14 and the oil cooler 15 are integrated, the air compressor 10 may control a movement path of compressed air by additionally forming a bypass valve 16.

When the air compression unit 10 uses the same power, the higher the discharge pressure, the lower the discharge flow rate. That is, since the air compression unit is generally 7 bar or more, an air compressor with a discharge pressure of 7 bar is used, but the air compression unit 10 of the present invention uses a low pressure type air compressor 12 of 2 to 3 bar, so that the same discharge flow rate is obtained. The required power consumption can be significantly reduced.

The air introduced through the air inlet filter 11 is at room temperature, and the inlet air is introduced into the air compressor 12. In the air compressor 12, the temperature of the inlet air rises to 80 to 100° C. by the heat of compression and is cooled while passing through the air cooler 14, so that the temperature of the inlet air is cooled to about +5° C. at room temperature.

At this time, the compressed air having a high temperature in the air compressor (12) passes through the oil separator (13) to separate the oil and is discharged to move along the inlet pipe (18) by the bypass valve (16) or the bypass pipe (19). ).

When inserting the impregnated tube 40 in the reverse direction in the conduit 300 shown in FIG. 1, low-temperature compressed air is used. At this time, the compressed air cooled by moving to the air cooler 14 along the inlet pipe 18 by the bypass valve 16 maintains a temperature similar to room temperature, so that the impregnated tube 40 is prevented from being cured early. I can.

In addition, when the impregnated tube 40 is vapor-cured in the pipeline 300, high-temperature compressed air is used. At this time, the bypass valve 16 directly discharges along the bypass pipe 19, mixes high-temperature compressed air and steam, and injects it into the impregnation tube 40, thereby preventing steam energy loss and reducing the generation of condensate water. .

Further, a controller 80 is additionally configured in the air compression unit 10, and the bypass valve 16 is controlled by the controller 80.

When described in detail with reference to FIG. 4,

As a general air compression unit 100 showing another embodiment of the air compression unit 10 of FIG. 3, the air compression unit 10 of FIG. 3 includes an air cooler 14 and an oil cooler 15 Since it is an integral type, the compressed air could be discharged to the bypass pipe 19 or the inlet pipe 18 by additionally forming the bypass valve 16.

The general air compressor 100 can be applied when the air cooler 14 and the oil cooler 15 are separate types, and compressed air is discharged through the air cooler 14, and at this time, the operation of the air cooler 14 By turning ON / OFF in the controller 80, high temperature compressed air may be discharged or room temperature compressed air may be discharged.

In order to save energy consumption when the air cooler 14 and the oil cooler 15 are integrated or separated as described above, a bypass valve 16 is additionally formed in the integrated type to control the temperature of the discharged compressed air. In the separate type, the controller 80 controls the operation of the air cooler 14 to control the temperature of the discharged compressed air.

When described in detail with reference to FIG. 5,

5 is a perspective view of the superheated steam unit 30 as viewed from the front, the inner side of the superheated steam unit 30 is separated into 4 rows, and only the left side of the remaining 3 rows is separated except for the top 1 row on the left side. A steam inlet pipe 31, a superheated steam outlet pipe 32, and an air inlet pipe 33 were formed on the outside of 39) from the top to the bottom.

As described above, the inner configuration of the superheated steam unit 30 has been described with reference to the drawings, and the superheated steam unit 30 of the present invention is formed in a multi-grid structure of 8 to 20, and the heater 34 in each grid It is preferable to insert and install a baffle to control the flow of compressed air and steam moving inside the superheated steam unit 30.

In addition, it is preferable to additionally form a water separator 35 inside the superheated steam unit 30 to remove condensed water in the steam without heat loss.

After removing the condensed water in the steam through the steam separator 35 built in the superheated steam unit 30, the steam input through the steam inlet pipe 31 is moved to the inside where the heater 34 is formed, and the removed condensate water Is discharged to the condensed water discharge pipe 36 formed at the lower end of the superheater body 39, and the air injected through the air inlet pipe 33 also moves to the inside where the heater 34 is formed, and the superheated steam unit 30 The superheated steam is discharged through the superheated steam discharge pipe 32 formed in the middle of the steam inlet pipe 31 and the air inlet pipe 33 by being heated by the heater 34 formed inside the.

High-temperature compressed air is introduced into the superheated steam unit 30 through the air inlet pipe 33 to the inside of the superheated steam body 39. At this time, as shown in the drawing, the heater 34 is operated in one step to provide compressed air. The temperature is raised to a set temperature and injected into the impregnating tube 40 of FIG. 1 to gradually increase the temperature while maintaining the pressure.

As described above, since the compressed air injected into the superheated steam unit 30 is heated, it is possible to prevent the generation of a large amount of condensed water generated by mixing the steam with the compressed air of a low temperature.

Since there is a limit to the temperature increase only with compressed air, the steam is gradually introduced into the superheated steam body 39 through the steam inlet pipe 31, and at the same time, the heater 34 is operated in two stages to raise the superheated steam to a set temperature. When the impregnation tube 40 is hardened by injecting it into the impregnation tube 40 of 1, and the heat transfer to the pipe 300 and the soil reaches an equilibrium state, the flow rate of the steam and the humidity of the superheated steam are measured in real time using a sensor and impregnated. While maintaining the temperature and pressure in the tube 40, the amount of steam injected is gradually reduced.

This is to reduce the humidity while maintaining the temperature of the superheated steam, thereby reducing the amount of use of steam flowing into the superheated steam unit 30 and reducing the amount of condensed water generated.

The superheated steam unit 30 replaces the steam separation unit 60 and the mixer 70 of FIG. 2 and can maximize the heating and mixing effect of superheated steam generated by inputting compressed air and steam. A steam flow meter may be additionally formed in the steam unit 30 to quantitatively monitor and control the inflow of steam, and a hygrometer may be additionally formed to measure and control humidity.

In addition, since several devices are replaced with one device, failure and management are easy, and maintenance and maintenance are simple.

As described above, the number of the heater 43 is for explanation using the drawings, and the superheated steam unit 30 of the present invention forms an inner side with a multi-grid structure of 8 to 20, and the outer side is finished with insulation, It is preferable to form by inserting a heater 43 into each grid inside the superheated steam unit 30 and to install a baffle plate.

When described in detail with reference to FIG. 6,

6 is a perspective view as viewed from the side of the superheated steam unit 30,

When the inside of the superheated steam part 30 is viewed from the side, it is divided by 4 X 2 to form a partition wall and separated. The inside of the superheated steam unit 30 is formed in a multi-grid structure of 8 to 20, and heaters 34 are installed therein, respectively, so that the steam and air inlet pipe 33 flowing through the steam inlet pipe 31 are provided. The air introduced through is mixed and heated to generate superheated steam.

It is possible to induce mixing of steam and compressed air through the installation of a partition wall and a baffle plate in the inner flow path of the superheat increase body 39 and increase the heating efficiency by the heater 34. In addition, the built-in separator 35 minimizes heat loss and improves the efficiency of condensate removal, and the outer side of the superheated steam part 30 is thermally closed to minimize heat loss, and heat efficiency is optimized by forming an integral type.

In the superheated steam unit 30, an overheated steam hygrometer, a flow control valve, a flow meter, and a controller are additionally formed so that accurate values of humidity and flow rate can be grasped. It is desirable to configure the unit 30 to control.

Compressed air introduced into the superheater body 39 through the air inlet pipe 33 formed at the lower left part moves the inside blocked by the partition wall to the right compartment along the flow path, and is heated by the heater 34 additionally formed for each compartment. Is moved to the upper compartment, and the steam introduced into the superheater body 39 through the steam inlet pipe 31 formed at the upper right side meets and mixes with the heated compressed air moved from the lower side, and the inner heater 34 It is heated by and becomes superheated steam. As shown in the figure, it moves to the upper cell, moves to the left cell, and moves to the lower cell again, and is discharged to the outside through the superheated steam discharge pipe 32 formed in the left middle part.

The superheated steam unit 30 minimizes the pressure and heat loss by minimizing the piping structure, and the outer wall of the superheater body 39 is heat-insulated to minimize heat loss.

When described in detail with reference to FIG. 7,

The temperature of the impregnated tube, indicated by the red line, gradually rises from 20℃ until the first 30 minutes, and rises to a maximum of 90℃. After that, it is maintained at 90°C until 180 minutes, and after 180 minutes, it is gradually cooled to room temperature.

Since the impregnated tube is heated and injected with compressed air above 150℃, the temperature of the impregnated tube is gradually raised, and the temperature of the impregnated tube is limited only by compressed air. Therefore, steam is gradually introduced and superheated steam is injected. At this time, it is possible to prevent the generation of a large amount of condensed water by using the superheated steam.

In order to maintain the curing temperature of the impregnated tube by continuously introducing superheated steam, the pressure, temperature and humidity are controlled and kept constant.

After the impregnated tube is hardened, the amount of steam is gradually reduced to control pressure, temperature, and humidity. If the humidity is lowered while maintaining the temperature, the amount of steam used can be reduced and the amount of condensed water generated can be reduced.

After that, steam inflow is blocked and the hardened impregnated tube is cooled to room temperature using only room temperature compressed air.

As shown in the graph of FIG. 7, it can be seen that the amount of steam of the conventional technology shown in FIG. 2 is consumed and required more than the amount of steam of the present invention shown in FIG. 1. In addition, in the temperature raising step, the slope of the amount of steam consumed is steeper than the slope of the increase in the temperature of the impregnated tube, and there are parts that deviate from the temperature gradient of the impregnating tube.

This is related to the efficiency of the energy consumed to increase the temperature of the impregnated tube.

It can be seen that the amount of steam consumed in the present invention is located on the inside of the temperature graph of the impregnating tube and requires a much smaller amount of steam than the amount of steam consumed in the conventional technology to increase and maintain the temperature of the impregnating tube.

As described above, the present invention is a system for repairing aging pipes by non-drilling, and since it uses lower energy than the existing system, it is possible to reduce the cost required for repair and to reduce the generation of condensed water, thereby preventing unhardening of the impregnated tube. I can.

When described in detail with reference to FIG. 8,

The non-excavation hardening system using low energy of the present invention proceeds through the following steps. First, the tube insertion step (S01) of inserting the impregnated tube into the aging conduit, the expansion step (S02) of expanding the impregnated tube into the aging conduit with low-temperature and low-pressure compressed air using an air compressor, and the high temperature The steam is superheated using a steam boiler and the first step of temperature rise (S03), in which compressed air is produced and introduced into the superheated steam, and the temperature is raised by operating the first-stage heater, and then injected into the impregnating tube to raise the temperature while maintaining the pressure. Step 2 of heating (S04) in which superheated steam is produced and injected into the impregnated tube by flowing into the steam section and operating the second-stage heater, and the first step of maintaining the curing temperature using heated compressed air and heated superheated steam. (S05) and temperature maintenance step 2 (S06), which reduces the amount of steam while maintaining pressure and temperature, controlling humidity, and shutting off steam injection and operating the air cooler of the air compression unit to produce compressed air at room temperature to heat only with compressed air. It comprises a cooling step (S07) of gradually cooling the cured impregnated tube to room temperature.

That is, it consists of a tube insertion step, an expansion step, a temperature rise step 1, a temperature rise step 2, a temperature maintenance step 1, a temperature maintenance step 2, and a cooling step.

In the tube insertion step (S01), the impregnated tube is inserted into a conduit that is aged and needs maintenance.

In the expansion step (S02), the impregnated tube inserted into the conduit is expanded in the conduit using compressed air of low temperature and low pressure. The low-temperature and low-pressure compressed air passes through an air compressor and an air cooler and passes through the superheated steam unit and is supplied to the impregnated tube in an unheated state by not operating the heater, thereby increasing only the necessary pressure.

In the first step of heating (S03), high-temperature compressed air is produced by an air compressor, it is not cooled by the bypass valve, but flows into the superheated steam, and the first step heater is operated to raise the temperature, and then the compressed air is supplied to the impregnated tube. It is to gradually increase the temperature while maintaining my pressure.

In the heating step 2 (S04), since there is a limit to heating only with compressed air, steam is gradually introduced with compressed air, and the second-stage heater is operated in the superheated steam to produce high-temperature superheated steam and supply it to the impregnated tube. The temperature is increased while maintaining the pressure by increasing the steam injected into the superheated steam and decreasing the compressed air injected into the superheated steam until the internal temperature of the impregnated tube reaches a set value.

In the temperature maintenance step 1 (S05), the amount of condensed water generated can be simultaneously reduced by reducing the amount of steam injected into the superheated steam unit. The compressed air and steam injection amount and heater output are controlled to maintain the curing temperature and pressure.

In the temperature maintenance step 2 (S06), the amount of vapor in the impregnated tube that has been hardened for a certain amount is gradually reduced. At this time, the humidity is controlled while maintaining the pressure and temperature. When the impregnated tube hardens and the heat loss to the pipeline and soil reaches equilibrium, the flow rate of the steam and the humidity of the superheated steam are measured in real time, while maintaining the temperature and pressure in the impregnating tube and reducing the amount of steam input. As described above, since the humidity is lowered while maintaining the temperature, the amount of steam used can be reduced and the amount of condensed water generated can be reduced.

In the cooling step (S07), the injection of steam is blocked and the air cooler is operated to produce compressed air at room temperature, thereby gradually cooling the heat-cured impregnated tube to room temperature with only compressed air.

As described in detail with reference to FIGS. 1 to 8 above, the results of the CIPP strength test completed using the system 1 are described in Table 1 below.

Application of existing technology Application of the present invention technology Flexural strength ^* Flexural modulus ^* Condensate Flexural strength Flexural modulus Condensate (N/mm ² ) (N/mm ² ) (L) (N/mm ² ) (N/mm ² ) (L) 55.5 2,875 33 55.2 2,405 11 57.6 2,020 - 51.4 2,419 0 *Test method: KS M 3015: 2003
*Condensate: D500mm, L=24m Total amount generated after construction

As shown in Table 1 above, the test method is KS M 3015:2003, which is a general test method for thermosetting plastics, and the flexural strength and flexural modulus required for CIPP maintained high values in both the conventional technology and the present invention.

As shown in Table 1, the generation of condensate water in the conventional technology is 33L, and the generation of condensate water in the two test constructions applying the present invention is 11L and 0L.It can be seen that the generation of condensate water in the present invention is 1/3 or less than that of the existing technology, which is very low. .

As described above, if the old pipe is repaired using the present invention, a large amount of condensed water can be prevented from being produced, thereby preventing the impregnated tube from being uncured, and the amount of steam used can be reduced, thereby reducing the energy required for steam production. Can be reduced.

In the present invention, the above embodiments are only examples, and the present invention is not limited thereto. Anything that has substantially the same configuration as the technical idea described in the claims of the present invention and achieves the same operation and effects is included in the technical scope of the present invention.

1. System
10. Air compression unit
11. Air inlet filter
12. Air Compressor
13. Oil separator
14. Air cooling aid
15. Oil cooling aid
16. Bypass valve
18. Inlet piping
19. Bypass piping
20. Steam boiler
30. Superheated steam section
31. Steam inlet pipe
32. Superheated steam discharge pipe
33. Air inlet pipe
34. Heater
35. Separator
36. Condensate discharge pipe
39. Hyperthermia base body
40. Impregnated tube
50. Ejector
60. Radix Separation
70. Mixer
80. Controller
90. Controls
100. General air compression unit
200. General system
300. Pipeline

Claims (5)

In the non-excavation repair method using a system for hardening an impregnated tube in an aging pipeline,
The compressed air generated by the air compression unit 10 generating compressed air, the steam boiler 20 generating steam, and the compressed air generated by the air compression unit 10 and the steam generated by the steam boiler 20 are introduced and mixed. The end point is discharged by connecting the impregnated tube 40 in the conduit 300 for injecting the superheated steam portion 30 to be heated and the heated steam generated by the superheated steam unit 30 to one side and the other side of the impregnating tube 40 Consisting of a system (1) comprising an ejector (50) and a control unit (90) for controlling the progress,
The air compression unit 10 is composed of an air inlet filter 11, an air compressor 12, an oil separator 13, an air cooler 14, an oil cooler 15, and a controller 80, and the air inlet The air introduced through the filter 11 is introduced into the air compressor 12, and the compressed air compressed through the air compressor 12 moves to the oil separator 13, and the compressed air and oil in the oil separator 13 Separated oil at the bottom by separating by is cooled in the oil cooler (15) and then moved to the air compressor (12) for reuse, and the separated compressed air at the top is inlet pipe (18) by the bypass valve (16). Pipeline non-excavation repair method using a low-energy hardening system, characterized in that it moves to the air cooler (14) or moves to the superheated steam unit (30) along the bypass pipe (19). delete The method according to claim 1,
The bypass valve 16 is applied when the air cooler 14 and the oil cooler 15 are integrated, and when the air cooler 14 and the oil cooler 15 are separate types, the controller 80 uses the air cooler ( 14) Controlling the operation of the pipe line non-excavation repair method using a low-energy hardening system, characterized in that the compressed air is passed. The method according to claim 1,
The inside of the superheated steam part 30 is formed in a multi-grid structure of 8 to 20, and heaters 34 are respectively configured therein to maintain efficient heating and temperature constant. A steam inlet pipe 31 for inputting is formed, an air inlet pipe 33 for injecting air into the lower left side is formed, and a superheated steam discharge pipe 32 for discharging superheated steam in which steam and air are mixed and heated in the left middle ), and a water separator 35 is additionally formed on the inside to remove condensed water in the steam without heat loss. The method according to claim 1,
In the method of hardening the impregnated tube in an aging pipeline by non-excavation using the system (1),
A tube insertion step (S01) of inserting an impregnated tube into an aging conduit;
An expansion step (S02) of expanding the impregnated tube with compressed air of low temperature and low pressure using an air compressor to intimate contact with the aging pipe;
Step 1 (S03) of raising the temperature while maintaining the pressure by injecting it into the impregnating tube after producing high-temperature compressed air with an air compressor, flowing it into the superheated steam, and operating the first step heater to raise the temperature;
A heating second step (S04) of introducing steam into the superheated steam using a steam boiler and operating a second-stage heater to produce superheated steam and injecting it into the impregnation tube;
A temperature maintenance step (S05) of maintaining the curing temperature using the heated superheated steam;
Temperature maintenance step 2 (S06) of reducing the amount of steam injection by controlling the humidity while maintaining the pressure and temperature;
Pipeline using a low-energy curing system comprising a cooling step (S07) of gradually cooling the impregnated tube thermally cured with only compressed air to room temperature by shutting off steam injection and operating the air cooler of the air compression unit to produce compressed air at room temperature. Non-excavation repair method.

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