JP2008018308A - Sludge concentrator and sludge concentrator equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sludge concentrating device having a vacuum function and a sludge concentrating function, having a simple pipe configuration and easy operation of a valve for opening and closing those pipes.
SOLUTION: A tank 5 in which a sludge tank 8 and a reaction tank 7 are separated by a partition, a pump 22 for depressurizing or pressurizing the inside of the reaction tank 7, and communication or blocking between the pump 22 and the reaction tank 7 The suction / pressurization switching valve 25, the sludge suction pipe 51 for sucking the raw sludge water into the sludge tank 8, and the sludge tank 8 or the reaction tank 7, or the sludge tank 8 and the reaction tank 7 A tank switching valve 45 communicating therewith, a drum screen 11 is provided in the sludge tank 8, the tank switching valve 45 is switched, the suction / pressurization switching valve 25 is switched, and the reaction tank 7 is driven by the pump 22. A path through which the original sludge water is sucked into the sludge tank 8 from the sludge suction pipe 51 into the sludge tank 8 and the sludge is separated by the drum screen 11, and the primary sludge from which the sludge is separated by the drum screen 11. From the sludge tank 8 A route for suctioning into the reaction tank 7 is provided.
[Selection] Figure 3

Description

  The present invention relates to a sludge concentrating device that concentrates and collects septic tank sludge, industrial waste sludge, and the like, and a sludge concentrating vehicle equipped with the same.

  Conventionally, septic tank sludge, industrial waste sludge, etc. (hereinafter simply referred to as “sludge”) are collected regularly (once a year) by a sludge collection vehicle or as needed and sent to a predetermined treatment plant. Being transported. In the case of the septic tank sludge, sewerage is spreading nationwide in urban areas, but there is a tendency to decrease. Tend to. This is due to the widespread use of a combined septic tank that treats domestic wastewater from a conventional single septic tank only for human waste. However, in the case of the septic tank sludge, since a large amount of water is collected together with the sludge, the sludge collection vehicle having a limited tank capacity has few septic tanks that can collect sludge in one collection operation, and the operation efficiency is very poor. .

  Therefore, a sludge concentrating vehicle that collects only the solid content in the collected sludge and attempts to improve operational efficiency has been proposed. In the case of this sludge concentrating vehicle, a sludge separator provided with a screen is provided apart from the tank (see, for example, Patent Document 1).

In addition, as another conventional technique, there is a tank in which a stock solution tank and a sludge tank are integrated, and a flat elliptical trick-type small drum screen with a rotating shaft inclined above the sludge tank (for example, , See Patent Document 2).
Japanese Patent Laid-Open No. 2004-100221 (Page 7, FIGS. 2 and 3) Japanese Utility Model Publication No. 61-45920 (page 3-4, FIG. 4)

  However, since Patent Document 1 has a configuration in which a sludge separator provided with a screen is installed apart from a tank, each configuration is connected by a very large number of pipes, and many of them open and close those pipes. This valve is required. Therefore, in this patent document 1, a lot of time and labor are required for connection of pipes at the time of manufacture, and complicated opening / closing operations of these pipes are required at the time of operation. However, the number of skilled workers is greatly reduced, making it difficult to operate efficiently, and it is difficult to operate an efficient sludge concentrating vehicle.

  In the case of Patent Document 2 as well, a plurality of pipes connected to a drum screen provided above the tank extend to the upper part of the tank, and many valves for opening and closing the pipes need to be provided around the tank. Therefore, this Patent Document 2 also requires a lot of time and labor for connecting pipes at the time of manufacture, and complicated opening and closing operations of these pipes are necessary at the time of operation. However, the number of skilled workers is greatly reduced, making it difficult to operate efficiently, and it is difficult to operate an efficient sludge concentrating vehicle.

  This also applies to sludge concentrators other than sludge concentrators, and the number of skilled workers is greatly reduced, making it difficult to operate efficiently, and the efficient operation of sludge concentrators is difficult.

  On the other hand, as mentioned above, there are many mountain villages that leave the urban area where septic tanks remain, so by concentrating sludge, the number of septic tanks that can collect sludge in one collection operation is increased to increase operational efficiency. There is also a demand to collect only sludge quickly in a place where it is not installed and to collect it more efficiently.

  Therefore, the present invention provides a sludge concentrating device that has a vacuum function and a sludge concentrating function, has a simple pipe configuration, and that can easily operate a valve that opens and closes these pipes, and a sludge concentrating vehicle including the sludge concentrating vehicle. For the purpose.

  In order to achieve the above object, a sludge concentrating apparatus of the present invention comprises a tank in which a sludge tank and a reaction tank are separated by a partition, a pump for depressurizing or pressurizing the reaction tank, the pump and the reaction tank, A suction / pressurization switching valve for communicating or shutting off, a sludge suction pipe for sucking raw sludge water into the sludge tank, and the sludge tank or the reaction tank, or a communication between the sludge tank and the reaction tank. A tank switching valve, provided with a sludge separation means in the sludge tank, by switching the tank switching valve, switching the suction / pressurization switching valve, and reducing the pressure in the reaction tank by the pump, A path for sucking raw sludge water from a sludge suction pipe into the sludge tank and separating the sludge by the sludge separation means, and the primary sludge separated by the sludge separation means from the sludge tank to the reaction tank. And a path for suctioning inward. The “raw sludge water” in the specification and the claims is “sludge water” including “sludge”, and refers to “sludge” to be sucked. “Primary sewage” means “sewage” obtained by separating “sludge” from “raw sludge”. With such a configuration, the pump and the reaction tank are communicated by the suction / pressurization switching valve, the sludge suction pipe and the sludge tank are communicated by the tank switching valve, and the sludge tank and the reaction tank are communicated. If the air in the reaction tank is sucked and reduced by a pump, the raw sludge water is sucked from the sludge suction pipe to the sludge tank, the sludge content in the raw sludge water is separated by the sludge separation means, and stored in the sludge tank. Only the primary sewage that has passed through the sludge separation means can be sucked into the reaction tank. This is the vacuum function.

  In addition, the path for supplying the flocculant to the primary sewage sucked into the reaction layer, the switching of the tank switching valve, the switching of the suction / pressure switching valve, and the pressure reduction in the reaction tank by the pump, You may provide the path | route which attracts | sucks air from the said sludge suction pipe into the said reaction tank, and stirs the primary sewage in this reaction tank. In this way, the sludge in the primary sewage sucked into the reaction layer can be aggregated with the flocculant, and the air can be agitated with the air sucked into the reaction tank to efficiently make the sludge into a floc form. .

  Furthermore, if a path for opening the reaction tank to the atmosphere by switching a path for opening the inside of the sludge tank to the atmosphere, switching the tank switching valve, and switching the suction / pressurization switching valve, And the inside of the reaction layer can be opened to the atmosphere.

  A path for pumping primary sewage from the reaction tank to the sludge tank by switching the tank switching valve, switching the suction / pressurization switching valve, and pressurizing the reaction tank by the pump; If the secondary sludge after separating the sludge from the primary sludge by the sludge separation means in the sludge tank is provided to the outside from the sludge suction pipe, the floc-shaped primary sludge in the reaction tank The sludge can be separated by secondary filtration with the sludge separation means of the sludge tank. This is the concentration function. The “secondary sewage” in the specification and claims refers to “sewage” obtained by separating the “sludge” that has been floculated by agglomeration reaction from the “primary muddy water”. The secondary sewage from which the floc sludge has been separated is discharged to the outside from the sludge suction pipe.

  Furthermore, a means for shutting off the sludge suction pipe is provided, and the sludge in the sludge tank is removed by switching the tank switching valve, switching the suction / pressurization switching valve, and pressurizing the sludge tank by the pump. By providing a discharge port for discharging, the communication between the inside of the reaction layer and the outside is blocked by the blocking means, and the sludge stored from the discharge port can be discharged efficiently by pressurizing the inside of the sludge tank.

  In addition, by arranging the suction / pressurization switching valve and the tank switching valve together on one side of the vehicle, each valve can be easily operated from one side of the vehicle. Valve operation is possible.

  On the other hand, the sludge concentration vehicle of the present invention includes any one of these sludge concentration apparatuses. By providing such a sludge concentrating device in a sludge concentrating vehicle, for example, even a septic tank sludge in a mountain village can be efficiently collected, and a sludge concentrating vehicle with high operational efficiency can be configured.

  The present invention can provide a sludge concentrating device having a vacuum function for sucking raw sludge water and a sludge concentration function for concentrating the sucked raw sludge water by means as described above, and efficiently. It becomes possible to suck sludge water and perform sludge collection work with high operational efficiency.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a sludge concentrating vehicle according to an embodiment of the present invention, and FIG. 2 is a plan view of the sludge concentrating vehicle shown in FIG. The overall configuration of the sludge concentration vehicle 1 equipped with the sludge concentration device 20 will be described based on these drawings. In the following description, the front side, rear side, left side, and right side refer to the front side, rear side, port side, and starboard side of the vehicle.

  As shown in FIG. 1, a traveling engine E is provided below the driver seat 2 of the sludge concentrating vehicle 1, and the engine E is provided with a PTO 21 (Power Take Off) for taking out power. A vehicle body frame 3 is provided from the driver's seat 2 toward the rear, a subframe 4 is provided on the upper portion of the vehicle body frame 3, and a sludge concentrating device 20 is mounted on these frames 3 and 4. A tank 5 extending in the front-rear direction of the vehicle is mounted on the subframe 4, and two tanks, a reaction tank 7 and a sludge tank 8, separated by a partition wall 6, are formed in the tank 5. The reaction tank 7 is provided on the front side of the vehicle, and the sludge tank 8 is provided on the rear side. A hose reel 9 for sucking raw sludge water into the tank 5 is provided at the upper part of the tank 5. The hose reel 9 stores, for example, a several tens meter sludge suction pipe (resin hose, etc.).

  A float valve 10 is provided in the upper part of the reaction tank 7, and a drum screen 11 as a sludge separation means is provided in the sludge tank 8. By providing the drum screen 11 as the sludge separation means in the sludge tank 8, the configuration and piping for sealing the drum screen 11 are reduced, thereby reducing the number of piping and the number of switching valves.

  Further, on the left side of the vehicle, there is provided an operation panel 17 provided with instruments such as a flocculant tank 12, an oil separator 13, an air separator 15, an engine tachometer and a pump exhaust thermometer. A confirmation window 18 for confirming the amount of primary sewage in the reaction tank 7 and a confirmation window 19 for confirming the amount of sludge stored in the sludge tank 8 are provided on the left side of the tank 5. As shown in FIG. 2, an overflow safety valve 14 and a water tank 16 are provided on the right side of the vehicle.

  FIG. 3 is a piping system diagram of the sludge concentrating device mounted on the sludge concentrating vehicle shown in FIGS. FIG. 3 shows a state when the raw sludge water in the septic tank is sucked. The piping system of the sludge concentrator 20 will be described below with reference to FIG. A pump 22 driven by the power extracted by the PTO 21 is provided, and air is sucked into the pump 22 via a check valve 23. An oil separator 13 is provided on the discharge side of the pump 22 to remove oil in the discharged air. On the downstream side of the oil separator 13, the inside of the reaction tank 7 and the sludge tank 8 in the tank 5 is depressurized (negative pressure) or the reaction tank 7 and the sludge tank 8 are discharged by discharging air from the pump 22 to the discharge pipe 24. A suction / pressurization switching valve 25, which is a four-way valve that switches when the inside is pressurized, is provided. The atmosphere release pipe 26 connected to the suction / pressurization switching valve 25 is opened to the atmosphere 27 via a silencer 37. The discharge pipe 24 is provided with a branch pipe 28, and the branch pipe 28 is provided with a relief valve 29 that opens at a predetermined set pressure. The relief valve 29 is set to a set pressure that allows the air discharged from the pump 22 to escape to the atmosphere 27 when the pressure on the suction / pressurization switching valve 25 side increases. On the upstream side of the check valve 23, there is provided an on-off valve 30 that is normally closed for use during maintenance inspections.

  The suction / pressurization switching valve 25 is connected to a first air pipe 31 that communicates with the check valve 23 and a second air pipe 32 that communicates with the tank 5 side. By switching the suction / pressurization switching valve 25, the first air pipe 31, the second air pipe 32, the discharge pipe 24, and the atmosphere release pipe 26 are switched. With such a pipe configuration, the pump 22 can perform pressure reduction for sucking air in the reaction tank 7 and the sludge tank 8 and pressure for discharging air into the reaction tank 7 and the sludge tank 8. It is like that.

  Further, the second air pipe 32 is connected via the air separator 15 to a third air pipe 33 communicating with the reaction tank 7 of the tank 5 and a fourth air pipe 34 communicating with the sludge tank 8. A float valve 10 for stopping the flow to the pump 22 when the reaction tank 7 is full is provided on the reaction tank 7 side of the third air pipe 33, and a float valve 10 is provided on the connection side with the fourth air pipe 34. An overflow safety valve 14 is provided so that sludge and water do not flow to the pump 22 side even when overflowing. The fourth air pipe 34 is provided with a check valve 35 for preventing reverse flow of air.

  According to these structures, it functions as follows. When the suction / pressurization switching valve 25 is switched to the left suction position a shown in the figure, the discharge pipe 24 of the pump 22 and the atmosphere release pipe 26 communicate with each other, and the first air pipe 31 and the second air pipe 32 communicate with each other. To do. If the pump 22 is driven in this state, the air in the reaction tank 7 is sucked from the air separator 15 to the second air pipe 32 and the first air pipe 31 via the third air pipe 33, and from the discharge pipe 24. It is emitted to the atmosphere 27 through the atmosphere opening pipe 26.

  Further, when the suction / pressurization switching valve 25 is switched to the middle positive position b in the center, the atmosphere release pipe 26 and the second air pipe 32 communicate with each other, and the discharge pipe 24 of the pump 22 and the first air pipe 31 communicate with each other. . In this state, the reaction tank 7 and the sludge tank 8 are opened to the atmosphere via the second air pipe 32 and the atmospheric discharge pipe 26.

  Further, when the suction / pressurization switching valve 25 is switched to the right pressurization position c shown in the figure, the discharge pipe 24 of the pump 22 and the second air pipe 32 communicate with each other, and the atmosphere release pipe 26 and the first air pipe 31 Communicate. When the pump 22 is driven in this state, the atmosphere is sucked into the pump 22 from the atmosphere opening pipe 26 via the first air pipe 31, and the pressurized air discharged from the pump 22 is discharged into the discharge pipe 24, suction / pressurization switching. Via the valve 25 and the second air pipe 32, the third air pipe 33 is supplied to the reaction tank 7 and the fourth air pipe 34 is supplied to the sludge tank 8.

  On the other hand, as described above, the drum screen 11 is provided in the sludge tank 8 as sludge separation means for separating the sludge content in the sucked raw sludge water. The drum screen 11 is provided with a cylindrical screen body 60 in which a rotation axis is disposed in the horizontal direction. A water container 38 is provided at the lower part of the screen body 60, and the lower part of the cylindrical screen body 60 is configured to always rotate within the water container 38. Thereby, the surface of the screen main body 60 is prevented from being dried and causing a function deterioration. The screen body 60 is rotationally driven by a hydraulic motor 40 driven by oil supplied from a hydraulic pump 39 driven by the PTO 21. 41 shown is a relief valve set to a predetermined pressure, and 42 is an oil tank.

  Furthermore, between the reaction tank 7 and the sludge tank 8, the 1st sludge pipe | tube 43 provided in the reaction tank 7, and the 2nd sludge pipe | tube which supplies raw sludge water or primary sludge water to the drum screen 11 of the sludge tank 8 A tank switching valve 45 that is a four-way valve that communicates with or shuts off 44 is provided. The tank switching valve 45 is connected to a third sludge pipe 46 for discharging primary sewage or secondary sewage from the water container 38 of the drum screen 11 and a fourth sludge pipe 47 connected to the hose reel 9. Has been. An air suction valve 48 for sucking air into the sludge tank 8 is provided in the middle of the second sludge pipe 44. Further, the fourth sludge pipe 47 is provided with a pressurizing valve 49 that closes when the tank 5 is pressurized. The hose reel 9 is provided with a sludge suction pipe 51 extending to the septic tank 50.

  According to these structures, it functions as follows. When the tank switching valve 45 is switched to the right sludge tank position d shown in the figure, the fourth sludge pipe 47 and the second sludge pipe 44 communicate with each other, and the third sludge pipe 46 and the first sludge pipe 43 communicate with each other. If the pressure in the reaction tank 7 is reduced in this state, the raw sludge water is sucked from the fourth sludge pipe 47 to the drum screen 11 in the sludge tank 8, and the primary sludge from which the sludge has been separated by the drum screen 11 becomes the water container 38. To the reaction tank 7 through the third sludge pipe 46 and the first sludge pipe 43.

  Further, a flocculant supply pipe 55 is connected to the reaction tank 7, and this flocculant supply pipe 55 is connected to the flocculant tank 12 through a flocculant valve 56. When supplying the flocculant, the required amount of flocculant is supplied from the flocculant tank 12 to the primary sewage in the reaction tank 7 whose pressure has been reduced by manually opening or closing the flocculant valve 56. In this embodiment, the flocculant supply pipe 55 is connected to the reaction tank 8, but the flocculant supply pipe 55 is connected to the first sludge pipe 43, the reaction tank 7 is decompressed, and the primary sewage is supplied to the reaction tank 7. At that time, the coagulant may be simultaneously sucked into the reaction tank 7 from the coagulant supply pipe 55 through the first sludge pipe 43 with the negative pressure.

  Furthermore, if the tank switching valve 45 is switched to the left reaction tank position f shown in the figure, the first sludge pipe 43 and the fourth sludge pipe 47 communicate with each other, and the second sludge pipe 44 and the third sludge pipe 46 communicate with each other. To do. In this state, the reaction tank 7 is opened to the atmosphere via the first sludge pipe 43 and the fourth sludge pipe 47.

  Further, when the tank switching valve 45 is switched to the intermediate two tank connection position e shown in the figure, the first sludge pipe 43 and the second sludge pipe 44 communicate with each other, and the third sludge pipe 46 and the fourth sludge pipe 47 communicate with each other. To do. If the inside of the reaction tank 7 and the sludge tank 8 is pressurized in this state, the inside of the sludge tank 8 is opened to the atmosphere via the third sludge pipe 46 and the fourth sludge pipe 47, so The primary sewage is pumped to the drum screen 11 in the sludge tank 8 through the first sludge pipe 43 and the second sludge pipe 44. This is a path for pumping the primary sewage from the reaction tank 7 to the sludge tank 8.

  In addition, a sludge discharge pipe 52 for discharging the sludge in the sludge tank 8 is provided below the sludge tank 8. The sludge discharge pipe 52 is provided with a discharge valve 53. By opening the discharge valve 53 and pressurizing the sludge tank 8, the sludge stored in the sludge tank 8 is discharged to the disposal site 54. The In this embodiment, the sludge discharge pipe 52 and the discharge valve 53 are the discharge ports for the sludge collected in the sludge tank 8.

  Further, the sludge concentrating device 20 of this embodiment is provided with a cleaning device 59 for injecting water in the water tank 16 from an injection nozzle 58 by a pump 57. With this cleaning device 59, the inside of the septic tank 50 can be cleaned or the hands of workers can be cleaned.

  The pump 22, the hydraulic motor 40 and the like are provided below the tank 5 in the rear part of the driver seat 2 shown in FIGS. 3 that appear in FIGS. 1 and 2 are given the same reference numerals in FIGS. Further, the sludge concentrator 20 of this embodiment is provided with the suction / pressurization switching valve 25, the tank switching valve 45, the pressurization valve 49 and the operation panel 17 on the left side of the tank 5, so that the operator can concentrate sludge. A series of operations can be easily performed on the left side of the apparatus 20.

  FIG. 4 is a work content diagram in the configuration of the piping system diagram shown in FIG. As shown in FIG. 4, there are five main operations for sucking and concentrating septic tank sludge by the sludge concentrator 20: raw sludge water suction, agglomeration reaction, release to the atmosphere, sludge concentration, discharge valve discharge. . In FIG. 4, each of these operations, the operation state of each valve at each operation, the internal pressure of the sludge tank 8 and the reaction tank 7, and the presence or absence of sludge water are summarized in a list format. The operations in each column will be described below with reference to FIGS.

  5 is a piping system diagram at the time of sucking raw sludge water in the work content diagram shown in FIG. 4, FIG. 6 is a piping system diagram at the time of agglomeration reaction in the reaction tank in the work content diagram shown in FIG. 4 is a piping system diagram when the atmosphere is released in the work content diagram shown in FIG. 4, FIG. 8 is a piping system diagram during sludge concentration in the work content diagram shown in FIG. 4, and FIG. 9 is a discharge valve in the work content diagram shown in FIG. It is a piping system figure at the time of discharge from.

  As shown in FIG. 5, when the raw sludge water is sucked, the tip of the sludge suction pipe 51 is inserted into the septic tank 50, the tank switching valve 45 is switched to the sludge tank position d with the pressurizing valve 49 opened, and suction is performed. The pressurization switching valve 25 is switched to the suction position a. Then, by driving the pump 22, the air in the reaction tank 7 is sucked and the pressure in the reaction tank 7 is reduced. As a result, the inside of the sludge tank 8 is depressurized via the first sludge pipe 43 and the third sludge pipe 46, and the sludge tank 8 is passed through the fourth sludge pipe 47 and the second sludge pipe 44 from the sludge suction pipe 51. Raw sludge water is sucked into the drum screen 11 provided. The sucked raw sludge is separated by the screen body 60 of the drum screen 11, and the primary sludge from which the sludge has been separated passes from the water container 38 through the third sludge pipe 46 and the first sludge pipe 43. And sucked into the reaction vessel 7. This is a path for sucking raw sludge water from the sludge suction pipe 51 into the sludge tank 8 and separating the sludge with the drum screen 11, and the primary sludge separated with the drum screen 11 from the sludge tank 8. And a path for suctioning into the reaction tank 7. By this operation, sludge is stored in the sludge tank 8 and primary sludge is stored in the reaction tank 7.

  By this operation, primary sludge water sucked into the tank 5 is subjected to primary filtration, and scum, precipitated sludge and the like in the septic tank 50 are stored in the sludge tank 8 from the drum screen 11 and filtered through the drum screen 11. Only the sewage is sucked into the reaction tank 7. The suction of raw sludge water by this operation is a vacuum function, and scum and precipitated sludge can be efficiently sucked into the sludge tank 8. Moreover, only one sludge can be efficiently stored in the sludge tank 8 through the drum screen 11 in the original sludge water having a large amount of sludge and the raw sludge having a small amount of sludge by one suction operation. Since only the sewage can be sucked, efficient raw sludge water suction and sludge separation can be performed continuously.

  As shown in FIG. 6, at the time of agglomeration reaction of the primary sewage sucked into the reaction tank 7, the tip of the sludge suction pipe 51 is taken out from the purification tank 50, and the tank switching valve 45 is switched to the reaction tank position f. The suction / pressurization switching valve 25 is at the suction position a, and the air in the reaction tank 7 is sucked by driving the pump 22. At the same time, a predetermined amount of the flocculant is supplied from the flocculant tank 12 into the reaction tank 7. This is a path for supplying the flocculant to the primary sewage sucked into the reaction layer 7. The amount of the flocculant is determined by the amount of primary sewage sucked into the reaction tank 7 or the like. At the same time, air is sucked into the reaction tank 7 from the sludge suction pipe 51, and the primary sewage in the reaction tank 7 is stirred with air. This is a path for sucking air and stirring the primary sewage in the reaction tank 7. Thereby, promotion of the aggregation reaction of primary sewage is achieved. During this operation, there is sludge in the sludge tank 8 and primary sewage in the reaction tank 7.

  As shown in FIG. 7, when the atmosphere is released, the tank switching valve 45 is switched to the reaction tank position f, and the suction / pressurization switching valve 25 is switched to the neutral position b. Further, the air suction valve 48 of the second sludge pipe 44 is opened. As a result, the reaction tank 7 is opened to the atmosphere by the third air pipe 33 communicating with the atmosphere opening pipe 26 via the second air pipe 32. On the sludge pipe side, the first sludge pipe 43 of the reaction tank 7 is opened to the atmosphere via the fourth sludge pipe 47 and the sludge suction pipe 51 of the hose reel 9, and the second sludge pipe 44 of the sludge tank 8 is air. The air is released through the intake valve 48. This is a path that opens the sludge tank 8 to the atmosphere. During this operation, there is sludge in the sludge tank 8 and primary sewage in the reaction tank 7.

  As shown in FIG. 8, at the time of sludge concentration, the tank switching valve 45 is switched to the two tank connection position e, and the suction / pressure switching valve 25 is switched to the pressure position c. The air intake valve 48 of the second sludge pipe 44 is closed. The water container 38 provided on the drum screen 11 of the sludge tank 8 is connected to the sludge suction pipe 51 whose tip is inserted into the septic tank 50 via the third sludge pipe 46, the tank switching valve 45 and the fourth sludge pipe 47. Communicated with. Then, by driving the pump 22, the atmosphere is sucked into the pump 22 via the suction / pressurization switching valve 25 from the atmosphere opening pipe 26, and the reaction tank 7 is sucked from the pump 22 via the suction / pressurization switching valve 25. Pressurized air is supplied to the inside and the sludge tank 8. At this time, since the inside of the sludge tank 8 communicates with the septic tank 50 under atmospheric pressure as described above, the primary sewage in the pressurized reaction tank 7 becomes the first sludge pipe 43, the tank switching valve 45, the second It is pumped to the drum screen 11 in the sludge tank 8 having a low pressure through the sludge pipe 44. The primary sewage pumped to the drum screen 11 is separated from the sludge by the screen body 60 of the drum screen 11. By this operation, the primary sewage in the reaction tank 7 is pumped into the sludge tank 8, and the reaction tank 7 has no primary sewage.

  By this operation, the secondary filtration of the primary sewage is performed, and the floc sludge that has been coagulated in the reaction tank 7 is stored in the sludge tank 8 from the drum screen 11. This is a concentration function for concentrating the primary sewage in the reaction tank 7 by the drum screen 11 as the sludge separation means. Moreover, since the secondary sewage filtered by the drum screen 11 is water from which the sludge is further removed from the primary sewage, the third sludge pipe 46, the tank switching valve 45, the fourth sludge pipe 47, Is discharged from the sludge suction pipe 51 as the tanning water of the septic tank 50. This is a path for discharging secondary sewage from the sludge suction pipe 51 to the outside.

  As shown in FIG. 9, when discharging from the discharge valve, the tank switching valve 45 is switched to the reaction tank position f, and the suction / pressurization switching valve 25 is switched to the pressure position c and discharged at the treatment plant 54. Valve 53 is opened. Then, by driving the pump 22, the atmosphere is sucked into the pump 22 from the atmosphere opening pipe 26 via the suction / pressurization switching valve 25, and the suction / pressurization switching valve 25 and the second air pipe 32 are pumped from the pump 22. Then, pressurized air is supplied from the third air pipe 33 into the reaction tank 7 and from the fourth air pipe 34 into the sludge tank 8. At this time, since the inside of the reaction tank 7 is closed by closing the pressurizing valve 49, the pressurized air is supplied only into the sludge tank 8, and the sludge stored in the sludge tank 8 by this pressurized air is discharged as sludge. It is discharged from the pipe 52 to the treatment plant 54. The sludge can be surely discharged. By this operation, the sludge in the sludge tank 8 is discharged, and there is no sludge in the sludge tank 8.

  In the above-described embodiment, the example in which the raw sludge water in the septic tank 50 is sucked and concentrated has been described. For example, if the raw sludge water has a low solid content, the tank switching valve 45 is switched to the reaction tank position f. In addition, each of the operations such as suction of sludge is not limited to the above-described operations.

  Further, the above-described embodiment shows an example, and various modifications can be made without departing from the gist of the present invention, and the present invention is not limited to the above-described embodiment.

  The sludge concentrating apparatus according to the present invention can be used for collecting sludge for suctioning septic tank sludge, industrial waste sludge and the like by a vacuum function, or simply concentrating and dewatering to improve loading efficiency and transport.

It is a side view which shows the sludge concentration vehicle which concerns on one embodiment of this invention. It is a top view of the sludge concentration vehicle shown in FIG. It is a piping system diagram of the sludge concentration apparatus mounted in the sludge concentration vehicle shown in FIGS. It is a work content figure in the structure of the piping system diagram shown in FIG. It is a piping system diagram at the time of the raw sludge water suction in the work content diagram shown in FIG. It is a piping system figure at the time of the aggregation reaction in the reaction tank in the work content diagram shown in FIG. FIG. 5 is a piping system diagram when the atmosphere is released in the work content diagram shown in FIG. 4. It is a piping system diagram at the time of sludge concentration in the work content diagram shown in FIG. It is a piping system figure at the time of discharge | emission from the discharge valve in the work content diagram shown in FIG.

Explanation of symbols

1 ... Sludge concentration vehicle
5 ... Tank
6 ... Bulkhead
7 ... Reaction tank
8 ... Sludge tank
9 ... Hose reel 11 ... Drum screen (sludge separation means)
DESCRIPTION OF SYMBOLS 12 ... Flocculant tank 17 ... Operation panel 20 ... Sludge concentrator 22 ... Pump 25 ... Suction / pressurization switching valve 27 ... Atmosphere 30 ... On-off valve 31 ... First air pipe 32 ... Second air pipe 33 ... Third air pipe 34 ... 4th air pipe 35 ... Check valve 38 ... Water container 39 ... Hydraulic pump 40 ... Hydraulic motor 43 ... 1st sludge pipe 44 ... 2nd sludge pipe 45 ... Tank switching valve 46 ... 3rd sludge pipe 47 ... 4th sludge Pipe 48 ... Air intake valve 50 ... Septic tank 51 ... Sludge suction pipe 52 ... Sludge discharge pipe 53 ... Discharge valve 54 ... Disposal site 60 ... Screen body
a ... Suction position
b ... Middle position
c ... Pressure position
d ... Sludge tank position
e ... 2 tank connection position
f ... Reaction tank position

Claims (7)

A tank in which a sludge tank and a reaction tank are separated by a partition;
A pump for depressurizing or pressurizing the inside of the reaction vessel;
A suction / pressure switching valve for communicating or blocking between the pump and the inside of the reaction tank;
A sludge suction pipe for sucking raw sludge water into the sludge tank and the sludge tank or the reaction tank, or a tank switching valve for communicating the sludge tank and the reaction tank;
A sludge separation means is provided in the sludge tank,
The sludge separation is performed by sucking raw sludge water from the sludge suction pipe into the sludge tank by switching the tank switching valve, switching the suction / pressurization switching valve, and reducing the pressure in the reaction tank by the pump. A sludge concentrating device comprising a path for separating sludge by means and a path for sucking the primary sludge separated from the sludge by the sludge separating means from the sludge tank into the reaction tank. A path for supplying a flocculant to the primary sewage sucked into the reaction layer;
By switching the tank switching valve, switching the suction / pressurization switching valve, and reducing the pressure in the reaction tank by the pump, air is sucked from the sludge suction pipe into the reaction tank. The sludge concentration apparatus according to claim 1, further comprising a path for stirring the primary sewage. A path for opening the inside of the sludge tank to the atmosphere;
The sludge concentration apparatus according to claim 1 or 2, wherein a path for opening the reaction tank to the atmosphere by switching the tank switching valve and switching the suction / pressurization switching valve is provided.   A path for pumping primary sewage from the reaction tank to the sludge tank by switching the tank switching valve, switching the suction / pressurization switching valve, and pressurizing the reaction tank by the pump, and the primary sewage The sludge concentration apparatus according to any one of claims 1 to 3, further comprising a path for discharging secondary sludge after the sludge is separated by sludge separation means in the sludge tank from the sludge suction pipe. . Providing means for blocking the sludge suction pipe;
The discharge port which discharges the sludge in this sludge tank by switching of the said tank switching valve, switching of the said suction and pressurization switching valve, and the pressurization in the sludge tank by the said pump was provided. The sludge concentration apparatus of any one of these.   The sludge concentration apparatus according to any one of claims 1 to 5, wherein the suction / pressurization switching valve and the tank switching valve are arranged together on one side of the vehicle. The sludge concentration vehicle provided with the sludge concentration apparatus of any one of Claims 1-6.

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