JP2012217969A - Cleaning device for surplus sludge transfer pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning device for a surplus sludge transfer pipe which cleaning device certainly cleans the interior of a transfer pipe that transfers surplus sludge during operation of a sludge disposal system.SOLUTION: The cleaning device cleans a surplus sludge transfer pipe that transfers surplus sludge for methane fermentation, and includes a high-temperature steam jetting unit which jets high-temperature steam to the interior of the surplus sludge transfer pipe. It is preferable that the cleaning device further includes a heat exchanging unit which exchanges heat between post-heating surplus sludge heated by the high-temperature steam and pre-heating surplus sludge. It is also preferable that the heat exchanging unit is of a double-pipe structure composed of a surplus sludge transfer pipe that transfers the post-heating surplus sludge and a surplus sludge transfer pipe that transfers the pre-heating surplus sludge.

Description

  The present invention relates to a cleaning device for excess sludge transfer pipe.

  In a general sewage sludge treatment system, surplus sludge is transferred through a transfer pipe and subjected to methane fermentation. However, this excess sludge is highly viscous because it contains impurities such as sand and microorganisms. Therefore, there is an inconvenience that the transfer pipe for transferring the excess sludge is easily clogged.

  As described above, various techniques for eliminating the clogging of the transfer pipe are provided for the inconvenience that the transfer pipe for transferring the excess sludge is easily clogged by the excess sludge. For example, there is a method of cleaning a pipe in an oil mixed sludge treatment system that removes mixed sludge remaining in the vertical pipe after the operation is stopped and does not cause the pipe to be blocked when the operation is resumed (Japanese Patent Laid-Open No. 2006-130370). ).

  However, since it is necessary to stop the operation of the sludge treatment system in order to carry out the pipe cleaning method in the oil mixed sludge treatment system described above, there is a possibility that the operating efficiency of the sludge treatment system is lowered.

  In other words, the surplus sludge transfer pipe that can reliably clean the inside of the transfer pipe that transports the excess sludge during operation of the sludge treatment system without stopping the sludge treatment system including a series of processes of methane fermentation of the surplus sludge. No cleaning device has yet been provided.

JP 2006-130370 A

  The present invention has been made in view of these disadvantages, and an object of the present invention is to provide a cleaning device for an excess sludge transfer pipe that can reliably clean the interior of the excess sludge transfer pipe during operation of the sludge treatment system. .

The invention made to solve the above problems is
A cleaning device for cleaning an excess sludge transfer pipe for transferring excess sludge for methane fermentation,
A surplus sludge transfer pipe cleaning device comprising a high temperature steam jetting section for jetting high temperature steam inside the surplus sludge transfer pipe.

  The surplus sludge transfer pipe cleaning device is provided with a high temperature steam jet section for jetting high temperature steam inside the surplus sludge transfer pipe, so that the heat and discharge pressure of the high temperature steam jetted from the high temperature steam jet section The excess sludge transfer pipe with high viscosity can be smoothly transferred in the excess sludge transfer pipe, and the excess sludge adhering to the inside of the excess sludge transfer pipe can be removed sufficiently to reliably clean the clogs inside the excess sludge transfer pipe. be able to. Furthermore, since the high-temperature steam ejected from the high-temperature steam ejection section is ejected through the surplus sludge transfer pipe without stopping the operation process until the surplus sludge is methane-fermented, the surplus sludge transfer pipe is washed. The apparatus can reliably achieve cleaning of the excess sludge transfer pipe during operation of the sludge treatment system including a series of processes for methane fermentation of excess sludge.

  The surplus sludge transfer pipe cleaning device may further include a heat exchanging unit that performs heat exchange between the heated surplus sludge heated by the high-temperature steam and the surplus sludge before heating. In this way, the cleaning device for the excess sludge transfer pipe includes a heat exchange unit that performs heat exchange between the heated excess sludge heated by the high-temperature steam and the excess sludge before heating. Heat efficiently moves to the previous excess sludge. As a result, the cleaning device for the excess sludge transfer pipe can reduce the energy amount of the high-temperature steam ejected with respect to the excess sludge and can save energy.

  The heat exchanging unit may be a double pipe type of an excess sludge transfer pipe for transferring the heated excess sludge and an excess sludge transfer pipe for transferring the excess sludge before heating. Thus, the said excess heat sludge transfer pipe is because the said heat exchange part is a double pipe type of the excess sludge transfer pipe which transfers the above-mentioned heating sludge, and the excess sludge transfer pipe which transfers the excess sludge before heating. This cleaning device can efficiently transfer heat from the above-described heated excess sludge to the excess sludge before heating with a compact configuration, and further increases the amount of energy of the high-temperature steam ejected to the excess sludge. Can be reduced.

  The cleaning apparatus for the excess sludge transfer pipe may further include a transfer pipe internal pressure measuring unit that measures the internal pressure of the excess sludge transfer pipe. Thus, by further including a transfer pipe internal pressure measuring unit that measures the internal pressure of the excess sludge transfer pipe, the cleaning device for the excess sludge transfer pipe can reduce the internal pressure of the excess sludge transfer pipe during operation of the sludge treatment system. It is possible to measure, and it is possible to easily grasp the clogged state of the excess sludge transfer pipe based on the internal pressure data thus measured.

  The cleaning apparatus for the excess sludge transfer pipe may further include a flow rate adjusting unit that adjusts the flow rate of the excess sludge in the excess sludge transfer pipe. Thus, by further including a flow rate adjusting unit that adjusts the flow rate of the excess sludge in the excess sludge transfer pipe, the cleaning device for the excess sludge transfer pipe is, for example, the excess sludge transferred by the excess sludge transfer pipe. The flow rate can be adjusted to be small, and the resistance in the excess sludge transfer pipe can be reduced. That is, since the resistance in the surplus sludge transfer pipe is reduced in this way, the high-temperature steam ejected from the high-temperature steam ejection section is kept inside the surplus sludge transport pipe while minimizing the decrease in heat and discharge pressure. The clogging of the attached excess sludge can be pumped more effectively, and as a result, the cleaning device for the excess sludge transfer pipe can further improve the cleaning effect of the excess sludge transfer pipe.

  As described above, the cleaning device for surplus sludge transfer pipe of the present invention injects high-temperature steam into the surplus sludge transfer pipe for transferring surplus sludge for methane fermentation in a series of processes for methane fermentation of surplus sludge. Therefore, it is possible to solve the problem of conventional cleaning of the excess sludge transfer pipe during operation of the sludge treatment system.

It is a flowchart which shows the sludge processing system containing the washing | cleaning apparatus of the excess sludge transfer pipe which concerns on the 1st Embodiment of this invention. It is a schematic block diagram which shows the washing | cleaning apparatus of the excess sludge transfer pipe concerning the 1st Embodiment of this invention. It is a flowchart which shows the sludge processing system containing the washing | cleaning apparatus of the excess sludge transfer pipe which concerns on the 2nd Embodiment of this invention. It is a schematic block diagram which shows the washing | cleaning apparatus of the excess sludge transfer pipe | tube which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the sludge processing system containing the washing | cleaning apparatus of the excess sludge transfer pipe which concerns on the 3rd Embodiment of this invention. It is a schematic block diagram which shows the washing | cleaning apparatus of the excess sludge transfer pipe which concerns on the 3rd Embodiment of this invention. It is a schematic block diagram which shows the washing | cleaning apparatus of the excess sludge transfer pipe which concerns on the 4th Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. Note that the present invention is not limited to these embodiments.

(Cleaning apparatus for excess sludge transfer pipe according to the first embodiment)
In the sludge treatment system of FIG. 1, surplus sludge R is sludge for methane fermentation, and is transported by surplus sludge transfer pipe S and methane fermented by methane fermentation apparatus T. In the sludge treatment system of FIG. 1, the surplus sludge transfer pipe cleaning device according to the first embodiment ejects high-temperature steam U into the surplus sludge transfer pipe S. The concentration of excess sludge R is not particularly limited. Moreover, it does not specifically limit as a kind of methane fermentation apparatus T, A well-known apparatus can be used.

  The excess sludge transfer pipe S is a member for transferring excess sludge R. The shape of the excess sludge transfer pipe S is not particularly limited as long as the excess sludge R can be sufficiently passed through the inside. Further, the inner diameter of the excess sludge transfer pipe S is not particularly limited as long as the excess sludge R can be sufficiently passed through the inside.

  The excess sludge transfer pipe cleaning apparatus 1 in FIG. 2 is an apparatus for cleaning the excess sludge transfer pipe S that transfers the excess sludge R. The surplus sludge transfer pipe cleaning device 1 mainly includes a high temperature steam ejection part 2, a high temperature steam generation part 3, a transfer pipe internal pressure measurement part 4, and a flow rate adjustment part 5.

  The high-temperature steam ejection part 2 communicates with the excess sludge transfer pipe S and is a member for ejecting the high-temperature steam U into the excess sludge transfer pipe S. The structure of the high-temperature steam ejection part 2 is not particularly limited as long as it can sufficiently eject the high-temperature steam U into the excess sludge transfer pipe S. Further, the ejection interval and ejection timing of the high-temperature steam U in the high-temperature steam ejection section 2 are not particularly limited, and for example, every minute, every hour, continuously, intermittently, or a combination pattern thereof. Can be mentioned.

  The high temperature steam generation unit 3 is a member for generating the high temperature steam U ejected from the high temperature steam ejection unit 2. The structure of the high temperature steam generator 3 is not particularly limited as long as the high temperature steam U can be generated satisfactorily.

  The transfer pipe internal pressure measurement unit 4 is a member for measuring the pressure inside the excess sludge transfer pipe S. The transfer pipe internal pressure measuring unit 4 mainly includes a transfer pipe internal pressure gauge 6 and an internal pressure data processing mechanism 7.

  The transfer pipe internal pressure gauge 6 is a member that is disposed in the excess sludge transfer pipe S and measures the pressure inside the excess sludge transfer pipe S. As the structure of the transfer pipe internal pressure gauge 6, the internal pressure of the excess sludge transfer pipe S is sufficiently measured even when the excess sludge R and high-temperature steam U exist and are transferred inside the excess sludge transfer pipe S. There is no particular limitation as long as it is possible. Also, the number and location of the transfer pipe internal pressure gauges 6 in the excess sludge transfer pipe S are not particularly limited.

  The internal pressure data processing mechanism 7 is a member for acquiring and analyzing pressure data inside the excess sludge transfer pipe S measured by the transfer pipe internal pressure gauge 6. The configuration of the internal pressure data processing mechanism 7 is not particularly limited as long as the internal pressure data of the excess sludge transfer pipe S measured by the transfer pipe internal pressure gauge 6 can be sufficiently acquired and analyzed.

  The flow rate adjusting unit 5 is a member for adjusting the flow rate of the excess sludge R transferred by the excess sludge transfer pipe S. The flow rate adjusting unit 5 mainly includes a valve 8 and a flow rate data processing mechanism 9.

  The valve 8 is a member that is disposed in the excess sludge transfer pipe S and that actually adjusts the flow rate of the excess sludge R that is transferred by the excess sludge transfer pipe S. The structure of the valve 8 is not particularly limited as long as the flow rate of the excess sludge R transferred by the excess sludge transfer pipe S can be sufficiently adjusted. Further, the number and location of the valves 8 in the excess sludge transfer pipe S are not particularly limited.

  The flow rate data processing mechanism 9 is a member for acquiring and analyzing the flow rate of the excess sludge R in the excess sludge transfer pipe S as data. The configuration of the flow rate data processing mechanism 9 is not particularly limited as long as it can sufficiently acquire and analyze the flow rate data of the excess sludge R inside the excess sludge transfer pipe S.

  Next, with reference to FIG. 2, the use procedure of the cleaning device 1 for the excess sludge transfer pipe will be described in detail focusing on the effects. In the state in which the excess sludge R is transferred inside the excess sludge transfer pipe S, the cleaning device 1 for the excess sludge transfer pipe causes the heat of the high temperature steam U to be generated by jetting the high temperature steam U from the high temperature steam jet part 2. Due to the discharge pressure, it is possible to smoothly transfer the excess sludge R with high viscosity, and it is possible to sufficiently remove the excess sludge R adhering to the inside of the excess sludge transfer pipe S. As a result, the excess sludge transfer pipe S The clogging can be reliably cleaned. Further, since the high-temperature steam U is ejected through the surplus sludge transfer pipe S without stopping the operation process until the surplus sludge R is subjected to methane fermentation, the surplus sludge transfer pipe cleaning device 1 During operation of the sludge treatment system including a series of processes for methane fermentation of R, cleaning of the excess sludge transfer pipe S can be reliably achieved.

  In the surplus sludge transfer pipe cleaning device 1, the jet direction of the high-temperature steam U is not particularly limited. For example, when the surplus sludge R is substantially the same as the transfer direction of the surplus sludge transfer pipe S, the excess sludge R The heat and discharge pressure of the high-temperature steam U are preferentially applied in substantially the same direction as the transfer direction, and particularly the inside of the excess sludge transfer pipe S disposed on the methane fermentation side (downstream side) can be sufficiently washed. it can.

  Moreover, the said excess sludge transfer pipe washing | cleaning apparatus 1 can measure the pressure inside the excess sludge transfer pipe S during operation of the above-mentioned sludge treatment system by providing the transfer pipe internal pressure measurement part 4, and is measured in this way. The internal pressure data of the excess sludge transfer pipe S can be acquired and analyzed, and the clogged state of the excess sludge transfer pipe S can be easily grasped. Specifically, when it is determined that the internal pressure of the excess sludge transfer pipe S is high during the operation of the above sludge treatment system, the excess sludge R adheres to the inside of the excess sludge transfer pipe S and clogging occurs. It can be easily estimated that the excess sludge R is not smoothly transferred.

  Moreover, the said excess sludge transfer pipe washing | cleaning apparatus 1 is easily equipped with the flow volume adjustment part 5, and adjusts the flow volume of the excess sludge R transferred in the above-mentioned excess sludge transfer pipe S in operation of the sludge treatment system. Can do. Specifically, during the operation of the above-described sludge treatment system, for example, the flow rate of the excess sludge R is reduced in the flow rate adjusting unit 5 (not shown in FIG. 2) disposed on the upstream side of the excess sludge transfer pipe S. When adjusted, the flow rate of the excess sludge R flowing inside the excess sludge transfer pipe S is limited, and as a result, the resistance inside the excess sludge transfer pipe S can be reduced. Since the internal resistance of the excess sludge transfer pipe S is reduced in this way, the high temperature steam U ejected from the high temperature steam ejection section 2 keeps the decrease in heat and discharge pressure while keeping the excess sludge transfer pipe to a minimum. The clogging of the excess sludge R adhering to the inside of S can be pumped more effectively, and as a result, the cleaning device 1 for the excess sludge transfer pipe can further improve the cleaning effect of the excess sludge transfer pipe S.

  The discharge pressure of the high-temperature steam U is not particularly limited. For example, if it is 0.2 MPa or more, the cleaning device 1 for the excess sludge transfer pipe surely cleans the excess sludge transfer pipe S described above. Can be achieved. Further, the temperature of the high-temperature steam U is not particularly limited.

  In addition, since the excess sludge R heated by the said high temperature steam U has low viscosity, it becomes difficult to adhere to the inside of the excess sludge transfer pipe S. Thus, the surplus sludge R is heated in the surplus sludge transfer pipe S by heating the surplus sludge R.

(Cleaning device for surplus sludge transfer pipe according to the second embodiment)
In the sludge treatment system of FIG. 3, the excess sludge R, the excess sludge transfer pipe S, and the methane fermentation apparatus T are the same as those in the sludge treatment system of FIG. In the sludge treatment system of FIG. 3, the surplus sludge transfer pipe cleaning device according to the second embodiment ejects the high temperature steam U into the surplus sludge transfer pipe S. However, this is different from the case of the cleaning apparatus for excess sludge transfer pipe according to the first embodiment.

  The excess sludge transfer pipe cleaning device 10 of FIG. 4 is an apparatus for cleaning the excess sludge transfer pipe S that transfers the excess sludge R. The surplus sludge transfer pipe cleaning device 10 mainly includes a high temperature steam ejection part 2, a high temperature steam generation part 3, a transfer pipe internal pressure measurement part 4, and a flow rate adjustment part 5. The transfer pipe internal pressure measurement unit 4 mainly includes a transfer pipe internal pressure gauge 6 and an internal pressure data processing mechanism 7, and the flow rate adjustment unit 5 mainly includes a valve 8 and a flow rate data processing mechanism 9. Note that the high-temperature steam ejection unit 2, the high-temperature steam generation unit 3, the transfer pipe internal pressure measurement unit 4, the flow rate adjustment unit 5, the transfer pipe internal pressure gauge 6, the internal pressure data processing mechanism 7, the valve 8, and the flow rate data processing mechanism 9 are described above. Since it is the same as that of the case of the cleaning apparatus 1 of the excess sludge transfer pipe, the same number is assigned and the description is omitted.

  Next, with reference to FIG. 4, the use procedure of the surplus sludge transfer pipe cleaning device 10 will be described in detail with a focus on the different effects from the surplus sludge transfer pipe cleaning device 1.

  In the surplus sludge transfer pipe cleaning device 10, the jet direction of the high temperature steam U is opposite to the surplus sludge R transfer direction in the surplus sludge transfer pipe S. Thus, when the ejection direction of the high temperature steam U is opposite to the transfer direction of the excess sludge R in the excess sludge transfer pipe S, the transfer direction of the excess sludge R is opposed to the upstream side in the above sludge treatment system. On the other hand, the surplus sludge transfer pipe disposed on the supply side (upstream side) of the surplus sludge R, even when the heat and discharge pressure of the high-temperature steam U acts preferentially and the sludge treatment system described above is in operation. The inside of S can be washed sufficiently.

  In addition, in the said excess sludge transfer pipe washing | cleaning apparatus 10, the reliable achievement of the washing | cleaning of the excess sludge transfer pipe S in the operation | movement of the above-mentioned sludge treatment system, and the surplus sludge transfer pipe S of having the transfer pipe internal pressure measurement part 4 are provided. For easy grasping of the clogging state, easy adjustment of the flow rate of the excess sludge R by providing the flow rate adjusting unit 5, the temperature and discharge pressure range of the high temperature steam U, etc. Same as the case.

(Cleaning device for excess sludge transfer pipe according to the third embodiment)
In the sludge treatment system of FIG. 5, the excess sludge R, the excess sludge transfer pipe S, the methane fermentation apparatus T, and the high-temperature steam U are the same as those in the sludge treatment system of FIG. Is omitted. In the sludge treatment system of FIG. 5, the surplus sludge transfer pipe cleaning device according to the third embodiment ejects the high temperature steam U into the surplus sludge transfer pipe S, but is heated by the high temperature steam U. It differs from the case of the cleaning apparatus of the surplus sludge transfer pipe which concerns on the said 1st Embodiment to provide the below-mentioned heat exchange part 12 which heat-exchanges the surplus sludge V heated and the surplus sludge R before a heating. Moreover, as shown in FIG. 5, the bypass which transfers the surplus sludge R before a heating directly to the methane fermentation apparatus T can also be installed. This bypass is a transfer pipe capable of transferring excess sludge R, and the same as the above-described excess sludge transfer pipe S can be used. In such a bypass, the excess sludge R before heating and the excess sludge R transferred from the heat exchange unit 12 can be mixed and transferred to the methane fermentation apparatus T. The high-temperature steam U can be ejected into the bypass.

  The excess sludge transfer pipe cleaning device 11 of FIG. 6 is an apparatus for cleaning the excess sludge transfer pipe S that transfers the excess sludge R. The surplus sludge transfer pipe cleaning device 11 mainly includes a high temperature steam ejection part 2, a high temperature steam generation part 3, a transfer pipe internal pressure measurement part 4, a flow rate adjustment part 5, and a heat exchange part 12. The transfer pipe internal pressure measurement unit 4 mainly includes a transfer pipe internal pressure gauge 6 and an internal pressure data processing mechanism 7, and the flow rate adjustment unit 5 mainly includes a valve 8 and a flow rate data processing mechanism 9. Note that the high-temperature steam ejection unit 2, the high-temperature steam generation unit 3, the transfer pipe internal pressure measurement unit 4, the flow rate adjustment unit 5, the transfer pipe internal pressure gauge 6, the internal pressure data processing mechanism 7, the valve 8, and the flow rate data processing mechanism 9 are described above. Since it is the same as that of the case of the cleaning apparatus 1 of the excess sludge transfer pipe, the same number is assigned and the description is omitted.

  The heat exchange part 12 is a member for performing heat exchange between the heated excess sludge V heated by the high-temperature steam U and the excess sludge R before heating in the excess sludge transfer pipe S. The structure of the heat exchange unit 12 is not particularly limited as long as it can sufficiently achieve heat exchange between the above-described heated excess sludge V and the excess sludge R before heating. Although a cylindrical form, a plate type, etc. are mentioned, it is preferable that it is a double pipe type mentioned later especially.

  Next, with reference to FIG. 6, the use procedure of the surplus sludge transfer pipe cleaning device 11 will be described in detail with a focus on different effects from the surplus sludge transfer pipe cleaning device 1 and the excess sludge transfer pipe cleaning device 10. To do.

  The surplus sludge transfer pipe cleaning device 11 includes the heat exchanging portion 12 so that heat is efficiently transferred from the heated surplus sludge V heated by the high-temperature steam U to the surplus sludge R before heating. Become. As a result, since the cleaning device 11 for the surplus sludge transfer pipe ejects the high temperature steam U to the surplus sludge R already heated by the heated surplus sludge V, the high temperature steam ejected to the surplus sludge R. Energy amount can be reduced, and energy saving can be achieved.

  In addition, in the cleaning apparatus 11 for the surplus sludge transfer pipe, the surplus sludge transfer pipe S of the surplus sludge transfer pipe S provided with the reliable achievement of the cleaning of the surplus sludge transfer pipe S during the operation of the above-described sludge treatment system and the transfer pipe internal pressure measuring unit 4 is provided. For easy grasping of the clogging state, easy adjustment of the flow rate of the excess sludge R by providing the flow rate adjusting unit 5, the temperature and discharge pressure range of the high temperature steam U, etc. Same as the case.

(Cleaning device for surplus sludge transfer pipe according to the fourth embodiment)
The excess sludge transfer pipe cleaning device 13 in FIG. 7 is an apparatus for cleaning the excess sludge transfer pipe S that transfers the excess sludge R. The excess sludge transfer pipe cleaning device 13 mainly includes a high-temperature steam ejection part 2, a high-temperature steam generation part 3, a transfer pipe internal pressure measurement part 4, a flow rate adjustment part 5, and a double pipe heat exchange part 14. The transfer pipe internal pressure measuring unit 4 mainly includes a transfer pipe internal pressure gauge 6 and an internal pressure data processing mechanism 7. The flow rate adjusting unit 5 mainly includes a valve 8 and a flow rate data processing mechanism 9. Note that the high-temperature steam ejection unit 2, the high-temperature steam generation unit 3, the transfer pipe internal pressure measurement unit 4, the flow rate adjustment unit 5, the transfer pipe internal pressure gauge 6, the internal pressure data processing mechanism 7, the valve 8, and the flow rate data processing mechanism 9 are described above. Since it is the same as that of the case of the cleaning apparatus 1 of the excess sludge transfer pipe, the same number is assigned and the description is omitted.

  The double pipe heat exchanging unit 14 is a member for performing heat exchange between the heated excess sludge V heated by the high-temperature steam U and the excess sludge R before heating. The structure of the double pipe heat exchange section 14 is such that the surplus sludge transfer pipe S has a double structure, and includes an outer pipe section 15 and an inner pipe section 16. In the double-pipe heat exchanging section 14, the heated surplus sludge V heated by the high-temperature steam U is transferred in the outer pipe section 15, and the surplus sludge R is transferred from the upstream of the sludge treatment system described above in the inner pipe section 16. The

  In addition, about the internal diameter of the said outer pipe part 15 and the inner pipe part 16, if the surplus sludge R and the heating surplus sludge V can be transferred satisfactorily, it will not specifically limit. Further, in each of the outer pipe portion 15 and the inner pipe portion 16, the transfer pipe internal pressure gauge 6 and the valve 8 described above can be arranged by selecting an arbitrary arrangement location and arrangement number.

  Next, referring to FIG. 7, the use procedure of the excess sludge transfer pipe cleaning device 13 will be described in detail with a focus on different effects from the above-described excess sludge transfer pipe cleaning device 1 and the excess sludge transfer pipe cleaning device 10. To do.

  As shown in FIG. 7, surplus sludge R transferred from the upstream side of the above-described sludge treatment system is first transferred through the inner pipe portion 16 and heated by the high-temperature steam U ejected from the high-temperature steam ejection section 2 to be heated surplus sludge. V. Next, the heated surplus sludge V is transferred to the outer pipe portion 15, exchanges heat with the surplus sludge R inside the inner pipe portion 16, and is transferred to the downstream side of the above-described sludge treatment system. In this case, since the surplus sludge R in the inner pipe portion 16 is heated by the heated surplus sludge V transferred by the outer pipe portion 15, the surplus sludge R is already heated when it reaches the high temperature steam ejection portion 2. Will be. That is, the surplus sludge transfer pipe cleaning device 13 includes the double pipe heat exchanging section 14 so that the heat transfer from the heated surplus sludge V to the surplus sludge R can be efficiently performed with a compact configuration. As a result, it is possible to further reduce the energy amount of the high-temperature steam ejected to the excess sludge R.

  In addition, in the cleaning apparatus 13 for the surplus sludge transfer pipe, the surplus sludge transfer pipe S of the surplus sludge transfer pipe S provided with the reliable achievement of the cleaning of the surplus sludge transfer pipe S during the operation of the above-described sludge treatment system and the transfer pipe internal pressure measuring unit 4 is provided. For easy grasping of the clogging state, easy adjustment of the flow rate of the excess sludge R by providing the flow rate adjusting unit 5, the temperature and discharge pressure range of the high temperature steam U, etc. Same as the case. In addition, since this heating surplus sludge V has low viscosity similarly to the surplus sludge R heated with the above-mentioned high temperature steam U, it becomes difficult to adhere to the inside of the surplus sludge transfer pipe S. Thus, the surplus sludge R is heated in the surplus sludge transfer pipe S by heating the surplus sludge R.

  The surplus sludge transfer pipe cleaning device of the present invention is not limited to the above embodiment. For example, in the apparatus for cleaning an excess sludge transfer pipe of the present invention, a means for measuring the surface temperature of the excess sludge transfer pipe can be employed as a means for confirming the cleaning state of the excess sludge transfer pipe. Specifically, such a means is used in the case where the surface temperature rapidly rises to, for example, 100 ° C. or more at an arbitrary position of the excess sludge transfer pipe after jetting high temperature steam into the excess sludge transfer pipe. At this point, the high temperature steam presses out the excess sludge adhering to the inside of the excess sludge transfer pipe, and it is judged that the cleaning has been achieved.

  For example, in the cleaning apparatus for excess sludge transfer pipe of the invention, the flow rate of excess sludge transferred by the excess sludge transfer pipe can be adjusted by a pump for transferring excess sludge and the like. In addition, it does not specifically limit about the kind of this pump, A well-known thing can be used.

  In addition, for example, in the cleaning device for excess sludge transfer pipe of the present invention, a mechanism that can freely change the jet direction of the high-temperature steam can be employed. The type of the mechanism is not particularly limited, and a known mechanism can be adopted, and examples thereof include an automatic type, a manual type, or a combination pattern thereof.

  Also, for example, in the cleaning apparatus for excess sludge transfer pipe of the present invention, the valve disposed in the above-described excess sludge transfer pipe upstream of the sludge treatment system is set in a slightly open state and disposed in the downstream excess sludge transfer pipe. By sufficiently releasing the valve, the downstream excess sludge transfer pipe can be washed strongly in a shorter time. Further, by setting the valve disposed in the surplus sludge transfer pipe downstream of the above-described sludge treatment system to a slightly open state and sufficiently releasing the valve disposed in the upstream sludge transfer pipe, the upstream surplus sludge The transfer tube can also be cleaned strongly in a shorter time.

  As described above, the cleaning device for excess sludge transfer pipe of the present invention can be suitably used for cleaning the excess sludge transfer pipe for transferring excess sludge in a general sludge treatment system.

DESCRIPTION OF SYMBOLS 1 Cleaning apparatus of excess sludge transfer pipe 2 High temperature steam injection part 3 High temperature steam generation part 4 Transfer pipe internal pressure measurement part 5 Flow rate adjustment part 6 Transfer pipe internal pressure gauge 7 Internal pressure data processing mechanism 8 Valve 9 Flow rate data processing mechanism 10 Excess sludge transfer pipe Cleaning device 11 Cleaning device for surplus sludge transfer pipe 12 Heat exchange section 13 Cleaning device for surplus sludge transfer pipe 14 Double pipe heat exchange section 15 Outer pipe section 16 Inner pipe section R Surplus sludge S Surplus sludge transfer pipe T Methane fermentation unit U High temperature steam V Heated excess sludge

Claims (5)

A cleaning device for cleaning an excess sludge transfer pipe for transferring excess sludge for methane fermentation,
An apparatus for cleaning an excess sludge transfer pipe, comprising a high temperature steam jetting part for jetting high temperature steam inside the excess sludge transfer pipe.   The apparatus for cleaning an excess sludge transfer pipe according to claim 1, further comprising a heat exchanging unit that performs heat exchange between the heated excess sludge heated by the high-temperature steam and the excess sludge before heating.   The surplus sludge according to claim 1 or 2, wherein the heat exchanging part is a double pipe type of a surplus sludge transfer pipe for transferring the heated surplus sludge and a surplus sludge transfer pipe for transferring the surplus sludge before heating. Transfer pipe cleaning device.   The cleaning apparatus for an excess sludge transfer pipe according to any one of claims 1 to 3, further comprising a transfer pipe internal pressure measurement unit that measures an internal pressure of the excess sludge transfer pipe. The cleaning device for an excess sludge transfer pipe according to any one of claims 1 to 4, further comprising a flow rate adjusting unit for adjusting a flow rate of the excess sludge in the excess sludge transfer pipe.

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