JP2016130422A - Vacuum-type drainage collection system and drainage collection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum-type drainage collection system and a drainage collection method for collecting drainage without leakage, in an economically efficient way.SOLUTION: A vacuum-type drainage collection system is provided that includes: a plurality of liquid storage tanks for storing drainage; a vacuum station having a collection tank into which drainage from the plurality of liquid storage tanks is collected, and a vacuum generator that introduces a negative pressure in the collection tank; a communication passage connecting each of the liquid storage tanks with the collection tank; a plurality of remote-controlled valves disposed in correspondence with each of the plurality of liquid storage tanks, for opening/closing the communication passage; measurement means disposed in correspondence with each of the plurality of liquid storage tanks, for measuring a condition of each of the plurality of liquid storage tanks; and control means for the remote-controlled valve that remote-controls an operation of the plurality of remote-controlled valves. The control means for the remote-controlled valve is capable of determining priority regarding an order of operation of the plurality of remote-controlled valves on the basis of an output signal from the measurement means, and remote-controlling the plurality of remote-controlled valves according to the priority.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vacuum drainage collection system and a drainage collection method.

  Conventionally, laboratory wastewater from laboratories, universities, factories, and the like has been collected by natural flow or pumping. However, leakage of the transport liquid leads to groundwater contamination. In the unlikely event that a leak occurs, it is difficult to identify and repair the leak location. In recent years, the Water Pollution Control Law has been revised and issued, and prevention of groundwater contamination has become increasingly important.

  Generally, it is not allowed to flow experimental waste liquid and experimental waste water containing harmful substances used in experiments in experimental facilities as they are to public sewers. The experimental waste liquid is a liquid discharged from the experimental facility, which is organic or inorganic, and refers to a concentrated experimental waste liquid containing the first and second washing water for laboratory equipment and containers, and is collected separately according to strict collection rules. Need to be disposed of by a specialized processor. On the other hand, experimental wastewater refers to wastewater discharged from the experimental facility after the third wash water of the experimental vessel, wastewater that is not experimental waste liquid, and equipment cooling water, collected in the wastewater treatment facility on the premises, and meeting the water quality standards Are required to be processed. The experimental wastewater treated at the wastewater treatment facility can be reused after being reclaimed or discharged to public sewers.

  In such experimental facilities, piping bodies, fittings, flanges, valves, drainage channels, drainage drains, and pumping equipment are used to collect experimental wastewater that requires wastewater treatment from each experimental wastewater source to treatment equipment. Ancillary facilities for flowing water containing harmful substances are provided. In these conventional incidental facilities, experimental wastewater has been collected by methods such as natural flow and pumping. In order to prevent groundwater contamination in the conventional incidental equipment of this type, for example, a structure as shown in FIG. 11 is required. When installing the pipe 1 on the ground, it is required to install it away from the floor so that leakage can be easily confirmed visually. At this time, the pipe 1 may be installed in the tray 2 in preparation for leakage. Moreover, when installing in the underground, the installation of the piping 1 in the trench 3 or the use of a protective pipe (sheath pipe) is required so that the drainage does not directly flow into the underground in case of leakage. In addition, it is conceivable to make a double structure by coating the inside of the pipe or passing the pipe through the existing pipe. Although it is relatively easy to examine the above structure in advance when constructing ancillary facilities, it is not easy to modify the above structure for drainage ditches installed underground in the past. It is possible that you are not satisfied. In such a case, as a second best measure, check the presence or absence of abnormalities by visual inspection, etc., or check the penetration of the underground into the underground by checking the fluctuation of the water level inside the drainage ditch etc. Is required.

  However, in the conventional method, there are many cases of leaks in the past in installed pipes and the like, joints such as joints, and equipment such as valves. In systems such as natural flow and pumping, it is impossible to completely prevent the leakage itself, no matter how much structural efforts are made. Therefore, it is necessary to take safety measures on the assumption that there is a possibility of leakage, and to perform inspections with sufficient frequency. In addition, with regard to the trench, there may be a case where a dedicated trench cannot be installed due to space limitations of the installation location. For those that cannot be changed to a structure that can cope with leakage, such as drainage channels installed underground in the past, it is necessary to prevent contamination of the groundwater by enhancing inspection facilities and tightening inspection contents.

An object of one embodiment of the present invention is to provide an economical vacuum drainage collection system that can collect liquid without leakage. Another object of the present invention is to provide an economical drainage collection method that can collect liquid without leakage. Further, according to an embodiment of the present invention, even when there is a defect in the vacuum piping, it is possible to immediately identify the defective part, thereby minimizing the inspection effort for preventing groundwater contamination. It is an object of the present invention to provide a vacuum drainage collection system that can perform such a process. The present invention can achieve at least one of the above objects.

  According to one embodiment of the present invention, a vacuum drainage collection system, a plurality of liquid storage tanks in which drainage is stored, a water collection tank in which drainage liquids in the plurality of liquid storage tanks are collected, and A vacuum station including a vacuum generator for introducing a negative pressure into the water collection tank, a communication path that connects each of the liquid storage tanks to the water collection tank, and a plurality of liquid storage tanks that open and close the communication path A plurality of remote control valves provided corresponding to each of the plurality of liquid storage tanks, measuring means provided corresponding to each of the plurality of liquid storage tanks, and a plurality of remote control valves And a remote control valve control means for remotely controlling the operation of the vacuum drainage collection system. The remote control valve control means can determine the priority for the operation order of the plurality of remote control valves based on the output signal from the measurement means, and can remotely operate the plurality of remote control valves according to the priority. According to this configuration, since the drainage is collected in the water collection tank through the communication path under a negative pressure, the drainage can be collected without the risk of leakage unlike the above-described conventional technology. Further, since all of the plurality of remote control valves are not opened simultaneously, it is possible to effectively prevent the liquid from staying in the communication pipe. In addition, the entire piping of the system can be designed with a minimum diameter, and the equipment of the vacuum station can be designed with a small capacity to realize an economical system.

  According to one embodiment of the present invention, the measurement means includes a water level meter that is provided corresponding to each of the plurality of liquid storage tanks and continuously measures the water level of the liquid storage tank, and includes a remote control valve control means. Can compare the measured values of the water level meter with each other and remotely control only the remote control valve corresponding to the liquid storage tank having the highest water level. According to this configuration, the plurality of remote control valves can be operated at appropriate timing so as to drain the water collecting tank in order from the liquid storage tank having the highest necessity for draining.

  According to one embodiment of the present invention, the remote control valve control means can remotely control at least one remote control valve among a plurality of remote control valves without performing mutual comparison of the measured values of the water level gauge. . According to this configuration, it is possible to quickly cope with an event that is considered to be a trouble on the system.

  According to one embodiment of the present invention, the vacuum station includes a power control panel that controls the operation of the vacuum generator, and the remote control valve control means is provided in the power control panel. With this configuration, a plurality of remote control valves can be opened and closed at an appropriate timing linked with the operation of the vacuum generator.

  According to one embodiment of the present invention, there is provided a method of collecting drainage under negative pressure in a water collection tank that communicates with each of a plurality of liquid storage tanks in which drainage is stored via a communication path. This method corresponds to each of the plurality of liquid storage tanks based on the output signal from the measuring means provided corresponding to each of the plurality of liquid storage tanks so as to measure the state of each of the plurality of liquid storage tanks. And determining a priority for the operation order of the plurality of remote control valves provided in the communication path, and remotely operating the plurality of remote control valves according to the priority.

According to one embodiment of the present invention, the measuring means is a water level meter provided in each of the plurality of liquid storage tanks, and the step of determining the priority is based on the measured values of the water level meter. The step of comparing the water levels of the storage tanks with each other includes the step of determining the first liquid storage tank having the highest water level.

  According to one embodiment of the present invention, the step of determining the first liquid storage tank is a step of determining whether or not the water level of the first liquid storage tank is equal to or lower than a predetermined valve actuation minimum water level. Opening the remote control valve corresponding to the first liquid storage tank when the water level of the first liquid storage tank is not below the predetermined minimum valve actuation level.

  According to one embodiment of the present invention, each of the plurality of liquid storage tanks is provided with a pressure gauge for measuring the pressure in the communication path, and the method is a remote operation corresponding to the first liquid storage tank. After the step of opening the valve, the water level of the first liquid storage tank is below a predetermined value, and the measured value of the pressure gauge of the first liquid storage tank and the pressure in the gas phase portion of the water collection tank are A step of closing the remote control valve corresponding to the first liquid reservoir when close to each other over a predetermined time.

  According to one embodiment of the present invention, after the step of opening the remote control valve corresponding to the first liquid storage tank, the water level of the first liquid storage tank is below a predetermined value, and A step of closing the remote control valve corresponding to the first liquid storage tank when the amount of increase in the water level of the water collecting tank reaches a predetermined value;

  According to one embodiment of the present invention, after the step of opening the remote control valve corresponding to the first liquid storage tank, the water level of the first liquid storage tank is below a predetermined value, and A step of closing a remote control valve corresponding to the first liquid storage tank when a predetermined time has elapsed;

  According to one embodiment of the present invention, the method includes the steps of starting operation of the vacuum generator to introduce negative pressure into the water collection tank, and when the gas phase portion of the water collection tank reaches a predetermined pressure. A step of stopping the operation of the vacuum generating device, a step of maintaining the stopped state of the vacuum generating device when all of the plurality of remote control valves are closed, and at least one of the plurality of remote control valves is And resuming operation of the vacuum generator when in the open state.

  According to an embodiment of the present invention, the method comprises the step of opening at least one remotely operated valve of the plurality of remotely operated valves without performing the steps of comparing each other.

  According to an embodiment of the present invention, the step of opening the at least one remote control valve includes at least one when a water level of at least one liquid storage tank exceeds a predetermined maximum allowable water level among the plurality of liquid storage tanks. Including opening only the remote control valve corresponding to the liquid reservoir.

  According to an embodiment of the present invention, the step of opening at least one remote control valve is performed by operating at least one manual operation means among a plurality of manual operation means provided corresponding to the plurality of remote control valves, respectively. Sometimes opening only the remotely operated valve corresponding to at least one manually operated means.

  According to one embodiment of the present invention, the step of opening the at least one remote control valve is performed such that the water level increase amount per unit time of at least one liquid storage tank among the plurality of liquid storage tanks is a predetermined maximum allowable water level increase amount. When only the remotely operated valve corresponding to at least one liquid reservoir is opened.

It is a figure showing roughly the whole composition of the vacuum type drainage collection system concerning one embodiment of the present invention. It is a figure showing plane arrangement of vacuum piping (communication passage) in one embodiment of the present invention. It is a figure which shows the detail of the liquid storage tank in one Embodiment of this invention. It is a figure which shows the longitudinal cross-sectional shape of the vacuum piping (communication channel) in one Embodiment of this invention. It is a functional block diagram of the vacuum type drainage collection system concerning one embodiment of the present invention. It is a flowchart which shows an example of the drainage collection method which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the drainage collection method which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the drainage collection method which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the drainage collection method which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the drainage collection method which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the drainage collection method which concerns on one Embodiment of this invention. It is a flowchart which shows an example of the drainage collection method which concerns on one Embodiment of this invention. It is a figure which shows the example of the incidental equipment piping structure for preventing a leak by a prior art.

  Hereinafter, a vacuum drainage collecting system according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the following embodiment, a system targeting experimental effluent discharged from experimental facilities installed in the premises of laboratories, universities, factories, etc. will be described. However, the system of the present invention is an experimental effluent. However, the present invention can be widely applied to collect liquid discharged from various facilities. The target facility (drainage source) is not particularly limited.

[Overview of vacuum drainage collection system]
FIG. 1 shows an overall outline of a vacuum drainage collection system (hereinafter simply referred to as a system) 400 according to an embodiment of the present invention. As an example, the system 400 includes a liquid storage tank 200 installed in an opening formed on the ground surface in the site of the experimental facility 100, a water collection tank 306 and a water collection tank in which wastewater from the liquid storage tank 200 is collected. And a vacuum station 300 including a vacuum generator (for example, a vacuum pump 303) for introducing a negative pressure to 306. A water collection tank 306 of the vacuum station 300 is connected to the wastewater treatment facility 600 via a pressure pump 304. The liquid storage tank 200 and the water collection tank 306 can communicate with each other through the communication path 500. As shown in FIG. 1, a remote control valve 501 that opens and closes the communication path 500 is provided in the communication path 500. In the present embodiment, the remote control valve 501 may be electrically connected to the on-site panel 502 (control panel).

  The system 400 includes a plurality of liquid storage tanks 200, and the communication paths 500 may be arranged in a tree-like planar arrangement as shown in FIG. 2, for example. In the example of FIG. 2, the communication path 500 includes a main pipe and a plurality of branch pipes branched from the main pipe and opened to the plurality of liquid storage tanks 200. Each branch pipe normally has the same diameter as the remote control valve 501 disposed in the corresponding liquid storage tank 200. When remote control valves 501 having different diameters are used between the plurality of liquid storage tanks 200, the diameters are compared at the confluence, and the pipe diameter downstream from the confluence is determined in accordance with the larger diameter. Can do. The on-site board 502 can be installed for each liquid storage tank 200.

The communication path 500 can be configured as an aerial pipe having a vertical cross-sectional shape as shown in FIG. 4 outdoors or indoors, and may be lifted, for example, to a ceiling portion in a facility. In the present embodiment, the communication pipe 500 can be provided with a ventilation pipe, which will be described later. In this case, a sufficient amount of air can be sucked into the communication pipe 500 to obtain a high flow rate and air lift effect immediately after liquid suction. . Also, when piping in the above-ground part or in a trench instead of an overhead piping, it is possible to perform piping with a longitudinal section shape with a higher degree of freedom compared to the natural flow method. In FIG. 4, reference numeral 506 denotes a check valve for preventing a back flow from the overhead piping to the liquid storage tank.

  As described above, in the present embodiment, for each of the plurality of liquid storage tanks 200, a field board 502 for operating an accessory device of the liquid storage tank 200 is installed. The remote control valve 501 of the storage tank 200 is electrically connected. The on-site panel 502 is installed in the vicinity of the corresponding liquid storage tank 200. The on-site panel 502 is electrically connected to a water level gauge 206 and a pressure gauge 507, which will be described later, and the measured values of the water level gauge 206 and the pressure gauge 507 are output to the on-site panel 502. The vacuum station 300 includes a power control panel 305, and operation control of the vacuum pump 303 and the pressure feed pump 304 is performed by the power control panel 305. Each field board 502 is electrically connected to the power control board 305.

[About liquid storage tank]
FIG. 3 shows details of the liquid storage tank 200. In the illustrated example, a box-shaped culvert (in other words, a culvert) 700 is embedded in the ground, and a liquid storage tank 200 is installed inside thereof. The culvert 700 is installed in preparation for a case where leakage occurs in the liquid storage tank 200 itself, but the culvert 700 is not necessarily provided in the system 400 of the present embodiment.

  On the side wall of the liquid storage tank 200, a drain pipe 102 is formed by natural flow from the drainage source 101, and waste water flows into the liquid storage tank 200 through this opening. In the liquid storage tank 200, a suction pipe 503 having a liquid suction port that opens at a desired height from the bottom surface of the liquid storage tank 200 is disposed, and a remote control valve 501 is provided in the suction pipe 503. Note that the suction pipe 503 is a part of the communication pipe 500. The remote operation valve 501 may be any valve that can be electrically opened and closed by a control signal, and various valves such as an electric valve, an electromagnetic valve, and a diaphragm operation valve can be used as the remote operation valve 501. Alternatively, a vacuum valve may be used as the remote control valve, and the vacuum valve may be controlled remotely by using an electric three-way valve instead of a non-powered controller. The remote control valve 501 is provided with a valve sensor (not shown) that can detect the open / closed state of the remote control valve 501. The valve sensor can output a valve open signal indicating that the remote control valve 501 is in an open state or a valve close signal indicating that the remote control valve 501 is in an open state to the field panel 502. The diameter of the remote control valve 501 and the number of units installed for each liquid storage tank 200 are not particularly limited, and should be determined according to the liquid quality (existence of solid matter, etc.) of the target drainage and drainage conditions. Can do. For example, when the solid matter is not included in the drainage liquid, it is not necessary to consider the passing particle size of the solid matter, so that it can be set to a relatively small aperture.

  In the present embodiment, the communication pipe 500 further includes a vent pipe that can be opened and closed with respect to the atmosphere, and the vent pipe includes an air suction port that is separate from the liquid suction port. The vent pipe is provided with an adjustment valve 505 for adjusting the amount of air sucked from the air suction port. The adjustment valve 505 can have a structure capable of adjusting the opening degree or adjusting the opening degree and the opening time. In the present embodiment, the adjustment valve 505 is an electric valve and is electrically connected to the field panel 502. In another embodiment of the present invention, the regulating valve 505 is not necessarily a motorized valve, and may be a solenoid valve. Further, a vent pipe provided with a manual adjustment valve 505 that can only adjust the opening degree may be provided on the upstream side (liquid suction port side) of the remote control valve 501. When the amount of liquid sucked at one time is small, an air suction port separate from the liquid suction port is not provided, and after the liquid suction from the liquid storage tank 200 is completed (that is, the water level of the liquid storage tank 200 is the liquid suction The remote control valve 501 may be kept open for a certain period of time (after being lower than the mouth), and air may be sucked only from the liquid suction port.

Measuring means for measuring the state of the liquid storage tank 200 can be provided in the liquid storage tank 200. As such a measuring means, for example, a water level gauge 206 and a pressure gauge 507 can be provided in addition to the valve sensor described above. The water level meter 206 can be provided for continuously measuring the water level of the liquid in the liquid storage tank 200. The measured value (continuous value) of the water level gauge 206 is output to the on-site panel 502. In addition, the pressure gauge 507 is provided in the communication pipe (branch pipe) 500 in each liquid storage tank 200, and the measurement value of the pressure gauge 507 is output to the field panel 502.

[About vacuum station]
Referring to FIG. 1 again, the vacuum station 300 will be described. The vacuum station 300 can be installed in the vicinity of the wastewater treatment facility 600. The embodiment will be described below by taking as an example the case of using a vacuum pump 303 as a vacuum generator. The vacuum station 300 in this embodiment includes a water collection tank 306, a vacuum pump 303 for introducing a negative pressure into the water collection tank 306, and a power control panel 305 for performing operation control of the vacuum pump 303. The negative pressure from the vacuum pump 303 is introduced into the communication path 500 through the water collection tank 306. By opening the remote control valve 501, the liquid in the liquid storage tank 200 is sucked into the communication path 500 via the suction pipe 503 due to the differential pressure between the negative pressure in the communication path 500 and the atmospheric pressure, and the water collection tank 306 can be collected.

  Although not shown, the water collection tank 306 is provided with a pressure gauge that measures the pressure in the gas phase portion of the water collection tank 306 and a water level gauge that measures the water level of the liquid in the water collection tank 306. These measured values are output to the power control panel 305.

  In the example of FIG. 1, a single water collection tank 306 is shown. However, in another embodiment of the present invention, two water collection tanks 306 may be provided with one set as a backup. Further, for example, when it is necessary to collect the waste liquid separately for each type, two water collection tanks 306 may be provided, and a switching valve may be provided at the inlet. The vacuum station may be an ejector type vacuum station that uses an ejector as a vacuum generator.

[Drainage collection method]
In the vacuum drainage collection system 400 of the present embodiment configured as described above, the on-site panel 502 disposed in the vicinity of each liquid storage tank 200 and the power control panel 305 disposed in the vacuum station 300 include: They can communicate with each other. An example of a functional block diagram of the vacuum drainage collection system 400 of this embodiment is shown in FIG. For convenience of explanation, FIG. 5 shows four liquid reservoirs 200 for one vacuum station 300, but the number of liquid reservoirs 200 is not particularly limited. For example, several tens of liquid storage tanks 200 may be managed by one vacuum station 300.

Referring to FIG. 5, as described above, each liquid storage tank 200 is provided with a remote control valve 501 and a measuring unit 201 that measures the state of each liquid storage tank 200. In the present embodiment, the measurement unit 201 includes, for example, a valve sensor that detects the open / close state of the remote control valve 501, a water level meter 206 that continuously measures the water level of the liquid in the liquid storage tank 200, and the liquid storage tank 200. A pressure gauge 507 provided in a communication pipe (branch pipe) 500 in or near the inside is included. The on-site panel 502 includes a communication unit 508 that can communicate with the power control panel 305, and the measurement value by the measuring unit 201 is output to the remote control valve control unit of the power control panel 305 via the communication unit 508. In particular, the continuous value of the water level gauge 206 is always monitored by the remote control valve control unit of the power control panel 305. Based on the measurement value of the measuring means 201, the remote control valve control unit can transmit a control signal for controlling the operation of the remote control valve 501 to the communication unit 508 of the field panel 502. The remote control valve 501 is electrically opened and closed by a control signal from the communication unit 508. The on-site panel 502 includes a manual operation unit 509 that can electrically open and close the remote control valve 501 without using the power control panel 305. The manual operation unit 509 may be anything that can be manually operated by an on-site worker, and may be, for example, a push button or a touch panel. When the manual operation unit 509 is operated, a control signal can be transmitted to the remote control valve 501 via the communication unit 508. When the manual operation unit 509 is operated, a signal indicating that the manual operation unit 509 has been operated can be output to the power control panel 305 via the communication unit 508.

  The power control panel 305 provided in the vacuum station 300 includes a CPU, a memory, and the like, and controls the operation of the remote operation valve control unit that can remotely control the operation of the remote operation valve 501 and the operation of the vacuum pump 303. A vacuum pump controller that can. Although not shown, the power control panel 305 is also provided with a pressure pump control unit that controls the operation of the pressure pump 304 according to the water level of the water collection tank 306. As will be described later, the measured values of the pressure gauge 307 and the water level gauge 308 of the water collection tank 306 output to the power control panel 305 can be used for operation control of the remote control valve 501 by the remote control valve control unit.

  In the vacuum type drainage collection system 400 of the present embodiment, information on the state of the plurality of liquid storage tanks 200 measured by the measuring means 201 is used as a remote control valve control unit of the power control panel 305 provided in the vacuum station 300. Can be collected. As an example, in this embodiment, the continuous value of the water level meter 206 provided in each liquid storage tank 200 is monitored by the remote control valve control unit, and the remote control valve control unit measures the water level meter 206 every predetermined time. The values are compared with each other, and the priority is determined for the operation order of the plurality of remote control valves 501. By operating the plurality of remote control valves 501 according to this priority, the liquid storage tank 200 having a high priority (in other words, a high water level) without opening all of the plurality of remote control valves 501 simultaneously. The liquid can be collected in order. Further, by associating the operation of the remote control valve 501 with the operation of the vacuum pump 303, the vacuum pump 303 can be operated more efficiently. As described above, the remote control valve 501 can be opened and closed at an appropriate timing in conjunction with the operation of the vacuum pump 303, so that it is possible to perform flexible control according to the drainage conditions of various facilities such as experimental facilities. become. As an example, the vacuum drainage collection system 400 of the present embodiment can operate as follows.

[First embodiment (scheduled collection mode)]
With reference to FIG. 6, a first embodiment of a drainage collection method using a vacuum drainage collection system 400 will be described. In the first embodiment, the power control panel 305 is configured to have a timer function such as a 24-hour timer. When the set time comes, processing by the remote control valve control unit (remote control valve control flow) and a vacuum pump The processing by the control unit (vacuum pump control flow) is executed in parallel. For convenience of explanation, this control method is referred to as a fixed time collection mode. Hereinafter, the remote control valve control flow and the vacuum pump control flow in the regular repetition collection mode will be described.

(Remote control valve control flow)
At the set time, the remote control valve control unit of the power control panel 305 compares the measured values of the water level gauge 206 with respect to all of the plurality of liquid storage tanks 200 monitored by the remote control valve control unit, and in order of increasing water level. A permutation is added (step 801). Next, the remote control valve control unit determines (selects) the first liquid storage tank 200 having the highest water level (step 802). Thereafter, the remote control valve control unit determines that the water level in the first liquid storage tank 200 is a predetermined water level (“minimum valve operation water level”) based on the measured value of the water level meter 206 in the first liquid storage tank 200. It is determined whether or not (step 803). When the water level of the first liquid storage tank 200 is not lower than the minimum valve operation water level (NO), the first liquid storage tank 200 is provided from the remote control valve control unit via the communication unit 508 of the field panel 502. A control signal is sent to the remote control valve 501 provided. As a result, the remote control valve 501 is opened (step 804). When the water level of the first liquid storage tank 200 is equal to or lower than the minimum valve operation level (YES), all the water levels of the plurality of liquid storage tanks 200 monitored by the remote control valve control unit are equal to or lower than the minimum valve operation level. . Therefore, the opening / closing operation of the remote control valve 501 is skipped, and the remote control valve control unit is in a standby state until the next set time.

  When the remote control valve 501 of the first liquid storage tank 200 is opened in step 804, the liquid in the first liquid storage tank 200 is caused by the differential pressure between the negative pressure in the communication pipe 500 and the atmospheric pressure. Suction is taken from the suction pipe 503. Thereafter, the remote control valve control unit determines whether or not the water level of the first liquid storage tank 200 is equal to or lower than a predetermined water level (LWL) based on the water level gauge 206 of the liquid storage tank 200 (step 805). ). The predetermined water level (LWL) is set to a level lower than the lowest valve operation level. When the water level of the liquid storage tank 200 is equal to or lower than a predetermined water level (LWL) (YES), the remote control valve control unit can close the remote control valve 501. However, in this embodiment, following step 805, the remote control valve control unit compares the measured value of the pressure gauge 507 of the first liquid storage tank 200 with the pressure of the water collection tank 306 (step 806). . When the pressures in the first liquid storage tank 200 and the water collection tank 306 are approximated for a certain time or longer, the remote control valve control unit closes the remote control valve 501 (step 807).

  By setting the closing condition of the remote control valve 501 in this way, after the liquid suction from the liquid storage tank 200 is completed (that is, after the water level of the liquid storage tank 200 becomes lower than the liquid suction port), The remote control valve 501 can be kept open for a certain period of time, and air can be sucked from the liquid suction port. At that time, the sucked air rapidly expands under a negative pressure in the communication pipe 500, so that the liquid is reliably conveyed to the water collection tank 306. In the present embodiment, the adjustment valve (electrically operated valve in this embodiment) 505 is opened and closed simultaneously with the opening and closing of the remote control valve 501 so as to obtain a sufficient flow velocity in the communication pipe 500.

  The air may be sucked from the liquid suction port in a short time (for example, several tens of seconds) after the remote control valve 501 is opened.

  As described above, in this embodiment, regarding the condition for closing the remote control valve 501, the water level of the first liquid storage tank 200 is equal to or lower than a predetermined water level (LWL) and the first liquid storage tank 200 is used. The remote control valve 501 can be set to be closed when the pressure in the water collection tank 306 approximates for a certain time or more. When air is sucked from the liquid suction port, the degree of vacuum in the communication pipe 500 changes every moment according to the air volume of the vacuum pump and the amount of sucked air, but gradually balances and converges to a certain degree of vacuum. Go. Based on the signals of the respective pressure gauges installed in the first liquid storage tank 200 and the water collection tank 306, the degree of vacuum of the liquid storage tank 200 and the water collection tank 306 is compared, and the pressure of both is constant. The remote control valve 501 can be closed when the time is approximated over the time and the pressure in the system 400 is almost equalized. When the pressures in the liquid storage tank 200 and the water collection tank 306 are equalized, all of the sucked liquid has reached the water collection tank 306, that is, there is substantially no liquid in the communication pipe 500. It is confirmed.

  By this series of operations, the liquid sucked into the communication pipe 500 from the remote control valve 501 is reliably transported to the water collecting tank 306 by the air sucked subsequently, and then the remote control valve 501 is closed. Become. Therefore, the remote control valve 501 can be closed in a state where no liquid exists in the communication pipe 500. Thereby, when starting the vacuum pump 303, the water collection tank 306 and the communicating path 500 can be easily maintained at a high degree of vacuum over the entire volume.

Not limited to the above example, for example, the fact that the water level of the first liquid storage tank 200 is equal to or lower than a predetermined water level (LWL) and that a predetermined time has elapsed since the remote control valve 501 was opened is The operating valve 501 may be closed. Alternatively, the water level of the first liquid storage tank 200 is equal to or lower than a predetermined water level (LWL), and the rising amount of the water level gauge 308 of the water collection tank 306 after the remote control valve 501 is opened is a certain value or more. It may be a closing condition of the remote control valve 501. Also in these cases, it is possible to keep the remote control valve 501 open for a certain period of time after the end of the liquid suction and to suck air from the liquid suction port.

  At the same time as the remote control valve 501 is closed, the adjustment valve 505 for the vent pipe (in this embodiment, a motor operated valve) is closed.

  When step 807 ends, the remote control valve control unit returns to step 801. At this time, since the water level of the liquid storage tank 200 selected as the first rank is equal to or lower than the predetermined water level (LWL), in step 802, the remote control valve control unit determines that the liquid reservoir tank has the second highest water level. 200 is selected as the first liquid storage tank 200. Then, the same opening / closing operation is performed on the remote control valve 501 of the liquid storage tank 200. By repeating this opening / closing operation, all of the liquid storage tanks 200 from the liquid storage tank 200 having the highest water level to the liquid storage tank 200 having the lowest water level are sequentially selected one by one according to the permutation of the water level. As a result, drainage collection to the vacuum station 300 is performed for each liquid storage tank 200.

  In addition, even if there is a water level rise due to a sudden inflow in the liquid storage tank 200 once drained during this repetition, if the permutation rises when the water level is compared, the liquid storage tank 200 is always sucked again.

  In addition, as described above, when the water level of the first liquid storage tank 200 does not reach the minimum valve operation level, the remote control valve control unit skips the opening / closing operation of the remote control valve 501 and performs the next setting. It will be in a standby state until the time.

  The liquid collected in the water collection tank 306 can be pumped to the adjacent wastewater treatment facility 600 at the shortest distance by the pumping pump 304 controlled based on the measured value of the water level meter in the water collection tank 306.

  The capacity of the liquid storage tank 200 can be determined in association with the operation interval (standby time) of the system 400. For example, when the operation interval is set to 1 hour, the capacity of the liquid storage tank 200 can be determined based on the maximum drainage amount per hour and the safety factor of the drainage source. Accordingly, when the operation interval of the system 400 is set to be long, the capacity of the liquid storage tank 200 can be increased, and when the operation interval of the system 400 is set to be short, the capacity of the liquid storage tank 200 can be reduced. As an example, the capacity of the liquid storage tank 200 can be designed to be about 50 liters. In addition, when a plurality of liquid storage tanks 200 are connected to the system 400, the capacity of all the liquid storage tanks 200 is not necessarily the same, and the capacity is set according to the scale of the drainage source connected to each liquid storage tank 200. You may design.

(Vacuum pump control flow)
When the set time comes, the vacuum pump control unit determines whether the activation condition of the vacuum pump 303 is satisfied (the presence or absence of a failure or the like) (step 901). When the vacuum pump 303 satisfies the activation condition, the vacuum pump control unit proceeds to step 902 and starts the operation of the vacuum pump 303 so that the water collection tank 306 and the communication path 500 are in a desired vacuum state. Then, the vacuum pump control unit determines whether or not the water collection tank 306 is at the vacuum pump stop vacuum degree (step 903). Specifically, in step 903, it is determined whether or not the measured value of the pressure gauge 307 is lower than a predetermined pressure required for collecting the drainage (step 903). If the water collection tank 306 is at the vacuum pump stop vacuum level (YES), the operation of the vacuum pump 303 is stopped at step 904. At this time, since there is no liquid in the communication path 500, the water collection tank 306 and the communication path 500 can be easily maintained at a high degree of vacuum over the entire volume. The vacuum pump stop vacuum degree can be appropriately set according to the diameter of the communication pipe 500, the pipe length, and the vertical cross-sectional shape. For example, when the pipe capacity of the system 400 is small, such as when the diameter of the communication pipe 500 is small and the pipe length is short, or when the head in the longitudinal cross-sectional shape is small, the operation may be performed at a low vacuum. Therefore, in this case, the vacuum pump stop vacuum degree can be set low.

  When the vacuum pump 303 is stopped in a state where the desired vacuum state is formed in this way, the vacuum pump control unit determines whether or not the remote operation valve control flow is ended (in other words, the remote operation valve control unit enters the standby state). Whether or not there is) is determined (step 905). This determination can be made based on the determination result in step 803 of the remote control valve control flow, for example. Alternatively, based on the valve open signal or the valve close signal of the valve sensor, it is determined that the remote control valve control flow is at an end by holding all the remote control valves 501 closed for a certain period of time or more. May be. When the remote control valve control flow is at the end (YES), the vacuum pump control unit enters a standby state. When the remote control valve control flow is not the end (NO), the vacuum pump control unit determines whether or not the water collection tank 306 is at the vacuum pump activation vacuum degree (step 906). Specifically, in step 906, it is determined whether or not the measured value of the pressure gauge 307 is higher than a predetermined pressure that requires operation of the vacuum pump 303. When the water collection tank 306 is at the vacuum pump activation vacuum degree (YES), the operation of the vacuum pump 303 is resumed. When the water collection tank 306 is not at the vacuum pump activation vacuum degree (in other words, when the water collection tank 306 has a sufficiently high degree of vacuum) (NO), the vacuum pump control unit maintains the vacuum pump 303 in a stopped state. . Then, in step 905 again, it is determined whether or not the remote control valve control flow is an end.

  According to another embodiment of the present invention, the series of operations does not necessarily have to be started every predetermined time. For example, a predetermined threshold value may be set for the water level of the liquid storage tank 200, and a series of operations may be automatically started when the water level of any liquid storage tank 200 reaches the threshold value. .

  In the first embodiment, the remote control valve control unit determines priorities for the operation order of the plurality of remote control valves 501 by comparing the measured values of the water level meter 206 with each other at predetermined time intervals, and the plurality of remote control valve control units according to the priorities. The remote control valve 501 is remotely operated. However, in another embodiment of the present invention, an abnormal value that can be determined as the occurrence of a trouble in operation is set for the water level and pressure in the liquid storage tank 200, and when an abnormal value is detected, the liquid indicating the abnormal value is displayed. Only the remote control valve 501 corresponding to the storage tank 200 can be operated. In this case, the remote control valve control unit does not perform a mutual comparison of the measured values of the water level meter 206. In the second embodiment described below, for example, when any water level of the plurality of liquid storage tanks 200 reaches the overflow danger water level for some reason, the drainage collection is performed only for the liquid storage tank 200. it can. For convenience of explanation, this control method is referred to as a high water level collection mode.

[Second Embodiment (High Water Level Collection Mode)]
In the second embodiment, the allowable maximum water level for each liquid storage tank 200 is set as an abnormal value. The measured value of the water level meter 206 of each liquid storage tank 200 is transmitted to the power control panel 305 via each field panel 502, and when this measured value reaches an abnormal value, the remote control valve control unit Begin drainage collection in hour collection mode. Hereinafter, the high water level collection mode will be described with reference to FIG.

(Remote control valve control flow)
When the remote control valve control unit detects that the measured value of the water level gauge 206 of any one of the liquid storage tanks 200 has reached an abnormal value, that is, a predetermined allowable maximum water level, the remote control valve 501 of the liquid storage tank 200 is detected. Is opened (step 804). Thereafter, it is determined whether or not the water level of the liquid storage tank 200 is equal to or lower than a predetermined water level (LWL) (step 805). When the water level of the liquid storage tank 200 becomes LWL or less, the remote control valve control unit may close the remote control valve 501. However, as in the first embodiment, the measured value of the pressure gauge 507 of the liquid storage tank 200 may be compared with the pressure of the water collection tank 306 (step 806). In this case, when the pressures in the liquid storage tank 200 and the water collection tank 306 are approximated for a certain time or longer, the remote control valve control unit closes the remote control valve 501 (step 807). As in the first embodiment, the closing condition of the remote control valve 501 is not limited to the above example. For example, the closing condition of the remote control valve 501 may be that the water level of the liquid storage tank 200 is equal to or lower than a predetermined water level (LWL) and that a predetermined time has elapsed after the remote control valve 501 is opened. Alternatively, it can be remotely controlled that the water level of the liquid storage tank 200 is equal to or lower than a predetermined water level (LWL), and the amount of increase in the water level of the water collection tank 306 after the remote control valve 501 is opened is a certain value or more. The closing condition of the valve 501 can also be set.

(Vacuum pump control flow)
If the vacuum pump control unit detects that the measured value of the water level meter 206 of any one of the liquid storage tanks 200 has reached an abnormal value, that is, a predetermined allowable maximum water level, whether the activation condition of the vacuum pump 303 is satisfied It is determined whether or not there is a failure (step 901). When the vacuum pump 303 satisfies the activation condition, the vacuum pump control unit proceeds to step 902 and starts the operation of the vacuum pump 303 so that the water collection tank 306 and the communication passage 500 are in a desired vacuum state. Then, it is determined whether or not the water collection tank 306 is at the vacuum pump stop vacuum degree (step 903). If the water collection tank 306 is at the vacuum pump stop vacuum level (YES), the vacuum pump 303 is stopped at step 904.

  When the vacuum pump 303 is stopped in a state where the desired vacuum state is formed in this way, the vacuum pump control unit determines whether or not the remote operation valve control flow is ended (in other words, the remote operation valve control unit enters the standby state). Whether or not there is) is determined (step 905). This determination can be performed based on, for example, a valve open signal or a valve close signal of the valve sensor. In this case, the remote control valve 501 is kept in a closed state for a certain period of time or more, so that remote control is performed. It may be determined that the valve control flow is an end. When the remote control valve control flow is at the end (YES), the vacuum pump control unit enters a standby state. When the remote control valve control flow is not the end (NO), the vacuum pump control unit determines whether or not the water collection tank 306 is at the vacuum pump activation vacuum degree (step 906). When the water collection tank 306 is at the vacuum pump activation vacuum degree, the operation of the vacuum pump 303 is resumed. When the water collection tank 306 is not at the vacuum pump activation vacuum degree (in other words, when the water collection tank 306 has a sufficient degree of vacuum) (NO), the vacuum pump control unit maintains the vacuum pump 303 stopped. Then, it is determined again whether or not the remote control valve control flow is the end.

[Third embodiment (collection mode during manual operation)]
In the third embodiment, even if the remote operation valve control flow and the vacuum pump control flow are started when the manual operation unit is operated to open the remote operation valve 501 of one of the liquid storage tanks 200, Good. The control method in this case is called a manual operation collection mode and is shown in FIG. In the third embodiment, the remote control valve control flow and the vacuum pump control flow are substantially the same as those described in the second embodiment except that the start condition is that the manual operation unit 509 is operated. It is. When the manual operation unit 509 is operated, a signal indicating that the manual operation unit 509 has been operated is output to the power control panel 305 and detected by the vacuum pump control unit and the remote control valve control unit. As in the second embodiment, the remote control valve control unit does not perform a mutual comparison of the measurement values of the water level meter 206. Also, unlike the first and second embodiments, the remote control valve 501 is opened by the manual operation unit 509. Therefore, when the remote operation valve control unit detects a signal indicating that the manual operation unit 509 has been operated. Then, it is determined whether or not the water level of the liquid storage tank 200 is equal to or lower than a predetermined water level (LWL) (step 805). When the water level of the liquid storage tank 200 becomes LWL or less, the remote control valve control unit may close the remote control valve 501, but compares the measured value of the pressure gauge 507 of the liquid storage tank 200 with the pressure of the water collection tank 306. (Step 806). In this case, when the pressures in the liquid storage tank 200 and the water collection tank 306 are approximated for a certain time or longer, the remote control valve control unit closes the remote control valve 501 (step 807). As in the first and second embodiments, the closing condition of the remote control valve 501 is not limited to the above example. For example, the closing condition of the remote control valve 501 may be that the water level of the liquid storage tank 200 is equal to or lower than a predetermined water level (LWL) and that a predetermined time has elapsed after the remote control valve 501 is opened. Alternatively, the water level in the liquid storage tank 200 is equal to or lower than a predetermined water level (LWL), and the amount of increase in the water level gauge 308 in the water collection tank 306 after the remote control valve 501 is opened is greater than or equal to a certain value. It is also possible to set a condition for closing the remote control valve 501.

  When the remote control valve 501 is operated by the manual operation unit 509, it is preferable that manual operation cannot be performed on a plurality of on-site panels 502 at the same time. Specifically, it is preferable that an interlock state in which the manual operation units 509 of the other site panels 502 are not operated when the manual operation unit 509 of the priority site panel 502 is operated can be set. For example, there is a case where it is desired to permit the discharge of harmful wastewater for each drainage source 101 due to circumstances on the wastewater treatment facility 600 side. In such a case, by controlling the priority on-site panel 502 by the operation on the administrator side. , Can manage the spill situation of toxic substances more strictly.

[Fourth embodiment (collection mode at excessive inflow)]
In the fourth embodiment, the remote control valve control unit has a function of calculating the water level increase per unit time of each liquid storage tank 200 based on the measurement value of the water level meter 206 of the liquid storage tank 200. . The amount of water level increase per unit time in the liquid storage tank 200 is calculated by using (WL2-WL1) / (T2) using the water level WL1 at time T1 and the water level WL2 at time T2 after a predetermined time interval from time T1. -T1). In the remote control valve control unit, this calculation is performed for each liquid storage tank 200 at predetermined time intervals, and when the calculation result is a large value, it indicates that the water level has greatly increased in a short time. In the liquid storage tank 200 designed to have a minimum capacity, if wastewater exceeding the maximum drainage amount that is the basis of the design flows in continuously from the experimental facility, etc., the wastewater collection by the vacuum station is not in time and the liquid from the liquid storage tank May overflow. Therefore, in the fourth embodiment, the allowable water level increase amount for each liquid storage tank 200 is set as an abnormal value. The measured value of the water level meter 206 of each liquid storage tank 200 is transmitted to the power control panel 305 via each field panel 502, and the water level increase calculated by the remote control valve control unit based on this measured value. When the value reaches the abnormal value, the remote control valve control flow and the vacuum pump control flow are started. For convenience of explanation, this control method is referred to as an excessive inflow collecting mode. Hereinafter, the excessive inflow collecting mode will be described with reference to FIG.

  In the fourth embodiment, the remote control valve control flow and the vacuum pump control flow are based on the start condition that the water level rise amount calculated for each liquid storage tank 200 per unit time has reached an abnormal value, that is, an excessive inflow. Except for this, it is substantially the same as that described in the second embodiment. As in the second embodiment, the remote control valve control unit does not perform a mutual comparison of the measurement values of the water level meter 206. For example, when the water level rise amount of any of the plurality of liquid storage tanks 200 reaches an abnormal value for some reason, the remote control valve control unit opens the remote control valve 501 of the liquid storage tank 200 (step 804). . Thereafter, when the water level of the liquid storage tank 200 becomes LWL or less, the remote control valve control unit may close the remote control valve 501, but the measured value of the pressure gauge 507 of the liquid storage tank 200 and the pressure of the water collection tank 306 are set. Comparison may be made (step 806). In this case, when the pressures in the liquid storage tank 200 and the water collection tank 306 are approximated for a certain time or longer, the remote control valve control unit closes the remote control valve 501 (step 807). As in the first, second, and third embodiments, the closing condition of the remote control valve 501 is not limited to the above example. For example, the closing condition of the remote control valve 501 may be that the water level of the liquid storage tank 200 is equal to or lower than a predetermined water level (LWL) and that a predetermined time has elapsed after the remote control valve 501 is opened. Alternatively, the water level in the liquid storage tank 200 is equal to or lower than a predetermined water level (LWL), and the amount of increase in the water level gauge 308 in the water collection tank 306 after the remote control valve 501 is opened is greater than or equal to a certain value. It is also possible to set a condition for closing the remote control valve 501.

  Thus, according to the embodiment of the present invention, it is possible to avoid sucking liquid from all of the plurality of remote control valves 501 at the same time. For example, the drainage liquid is sucked for each liquid storage tank 200 in accordance with the permutation of the water level, and is transported to the water collection tank 306. Therefore, it is possible to effectively prevent the liquid from staying in the vacuum pipe line (communication path 500). be able to. Further, the diameter of the vacuum pipe line need not be determined in consideration of the maximum amount of drainage per hour of the entire collection area, and all routes can be designed with the minimum diameter. Further, the capacity of the vacuum pump 303 installed in the vacuum station 300 does not need to be determined in consideration of the maximum drainage amount per hour of the entire collection area, and the maximum capacity and gas-liquid ratio (intake air amount) of each liquid storage tank 200. The volume can be designed with the minimum capacity in consideration of the volume ratio of the suction liquid to When it is necessary to open a plurality of remote control valves 501 at the same time for the convenience of the experimental facility 100, etc., the minimum number of simultaneously opened valves is taken into consideration in the design conditions, and the vacuum piping and vacuum station 300 are provided on a scale with an allowance. The specifications can be determined. In addition, by comparing the water level of the highest priority liquid storage tank with a predetermined threshold (valve minimum water level), the remote control valve is opened only for the liquid storage tank where the liquid needs to be collected. collect. Therefore, the drainage collecting step can be performed more efficiently.

  In addition, when it is necessary to collect different types of drainage, and when it is desired to collect these separately, the remote control valve 501 that operates for each liquid type when setting the time schedule of the opening time of the remote control valve 501 is set. Separate collection is possible by opening and closing in groups. In this case, it is also effective to combine the method with two pipes according to the grouping or the method of installing two water collecting tanks 306 in the vacuum station 300 and installing a switching valve at the inlet.

  Further, according to the embodiment of the present invention, it is possible to easily find a defect in the vacuum pipe (communication pipe 500). Since the vacuum pipe has a negative pressure, even if there is a malfunction (breakage, etc.) in the pipe, the drainage does not leak to the outside, but air is sucked from the broken part. In this case, even if the vacuum pump 303 is operated, a desired degree of vacuum cannot be obtained, or the vacuum pump 303 is operated excessively for a long time. Or the malfunction that the vacuum degree of the communicating path 500 falls gradually arises during the waiting time when the remote control valve 501 is not opened. By issuing an alarm when such a driving situation is detected, it is possible to immediately grasp the breakage of the communication path 500.

  In addition, according to the embodiment of the present invention, the remote control valve 501 is opened and closed at different timings for each liquid storage tank 200. Therefore, when a water quality abnormality of drainage is detected, the drainage source can be quickly identified. Is possible. For example, if the liquid storage tank 200 or the vacuum station 300 includes a sensor relating to water quality or harmful gas (for example, a pH meter or a harmful gas detector) and the sensor measures an abnormal value, the system 400 is stopped, and the problem occurrence point is determined. The monitoring method to report can be taken. As a result, even when high-concentration wastewater is accidentally flowed into the system 400 from the experimental facility 100 or the like, the wastewater source may be quickly identified, and wastewater exceeding the specified value may flow out of the system from the wastewater treatment facility 600. Can be eliminated. Moreover, even when a harmful gas is generated by mistake due to mixing of a plurality of discharged liquids, the generation source can be quickly identified.

In addition, the drainage collecting method according to the above embodiment can be implemented in combination. FIG. 10 is an example in which the scheduled repeated collection mode of the first embodiment is set as a normal operation method and can be switched to the high water level collection mode of the second embodiment. FIG. 11 is an example in which the scheduled repeated collection mode of the first embodiment is set as a normal operation method and can be switched to the manual operation collection mode of the third embodiment. FIG. 12 is configured such that the scheduled repeated collection mode of the first embodiment is set as a normal operation method, and the high water level collection mode of the second embodiment and the excessive inflow collection mode of the fourth embodiment can be switched. It is an example. In this case, since the inflow tendency can be grasped before the high water level is reached at the time of excessive inflow and collection can be started ahead of time, the drainage can be collected without fear of overflow of the liquid storage tank.

  Also, the above four embodiments can be implemented so as to be switchable with each other.

  The present invention can be widely applied as a vacuum drainage collection system and a drainage collection method for collecting liquid discharged from various facilities.

DESCRIPTION OF SYMBOLS 1 Pipe 2 Receptacle 3 Trench 100 Experiment facility 101 Drain source 102 Drain pipe 200 Liquid storage tank 201 Measuring means 206 Water level meter 300 Vacuum station 303 Vacuum pump 304 Pressure pump 305 Power control panel 306 Water collection tank 307 Pressure gauge 308 Water level meter 400 Vacuum Type drainage collection system 500 communication path 501 remote control valve 502 spot panel 503 suction pipe 505 adjustment valve 506 check valve 507 pressure gauge 508 communication unit 509 manual operation unit 600 wastewater treatment facility 700 culvert

Claims (15)

A vacuum drainage collection system,
A plurality of liquid storage tanks in which drainage is stored;
A vacuum station comprising a water collection tank in which drainage liquid in the plurality of liquid storage tanks is collected and a vacuum generator for introducing a negative pressure into the water collection tank;
A communication passage communicating each of the plurality of liquid storage tanks and the water collection tank;
A plurality of remote control valves provided corresponding to the plurality of liquid storage tanks so as to open and close the communication path;
Measuring means provided corresponding to each of the plurality of liquid storage tanks so as to measure the state of each of the plurality of liquid storage tanks;
Remote control valve control means for remotely controlling the operation of the plurality of remote control valves,
The remote control valve control means determines priority for the operation order of the plurality of remote control valves based on an output signal from the measurement means, and remotely operates the plurality of remote control valves according to the priority. Vacuum drainage collection system. The vacuum drainage collection system according to claim 1,
The measurement means includes a water level meter that is provided corresponding to each of the plurality of liquid storage tanks and continuously measures the water level of the liquid storage tank, and the remote control valve control means includes the water level gauge A vacuum drainage collection system that compares measured values with each other and can remotely control only the remote control valve corresponding to the liquid reservoir having the highest water level. The vacuum drainage collection system according to claim 2,
The remote control valve control means is capable of remotely operating at least one remote control valve among the plurality of remote control valves without performing mutual comparison of measured values of the water level gauge. . The vacuum drainage collection system according to any one of claims 1 to 3,
The vacuum station includes a power control panel that controls the operation of the vacuum generator, and the remote control valve control means is provided in the power control panel. A method of collecting the drainage liquid under a negative pressure in a water collection tank that communicates with each of a plurality of liquid storage tanks in which the drainage liquid is stored through a communication path,
Based on the output signal from the measuring means provided corresponding to each of the plurality of liquid storage tanks so as to measure the state of each of the plurality of liquid storage tanks, respectively corresponding to the plurality of liquid storage tanks Determining a priority for the operation order of a plurality of remote control valves provided in the communication path;
Remotely operating the plurality of remote control valves according to the priority. 6. A method according to claim 5, wherein
The measuring means is a water level meter provided in each of the plurality of liquid storage tanks,
The step of determining the priority includes a step of mutually comparing the water levels of the plurality of liquid storage tanks based on the measured value of the water level gauge, and the step of comparing the first is the first rank having the highest water level. Determining the liquid reservoir. The method of claim 6, comprising:
The step of determining the first liquid storage tank includes a step of determining whether or not the water level of the first liquid storage tank is equal to or lower than a predetermined minimum valve actuation water level, and the first liquid storage tank. Opening the remote control valve corresponding to the first liquid reservoir when the tank water level is not below a predetermined valve actuation minimum water level. The method of claim 7, comprising:
Each of the plurality of liquid storage tanks is provided with a pressure gauge for measuring the pressure in the communication path, and the method includes:
After the step of opening the remote control valve corresponding to the first liquid storage tank, the water level of the first liquid storage tank is below a predetermined value, and the first liquid storage tank Closing the remote control valve corresponding to the first liquid reservoir when a pressure gauge measurement and a pressure in the gas phase of the water collection tank approximate each other over a predetermined time. The method according to claim 7 or 8, comprising:
After the step of opening the remote control valve corresponding to the first liquid storage tank, the water level of the first liquid storage tank is below a predetermined value, and the amount of increase in the water level of the water collection tank is Closing the remote control valve corresponding to the first liquid reservoir when a predetermined value is reached. A method according to any one of claims 7-9,
After the step of opening the remote control valve corresponding to the first liquid storage tank, the water level of the first liquid storage tank is equal to or lower than a predetermined value, and when the predetermined time has elapsed, Closing the remote control valve corresponding to the liquid reservoir. A method according to any one of claims 5 to 10, wherein
Starting operation of the vacuum generator to introduce negative pressure into the water collection tank;
Stopping the operation of the vacuum generator when the gas phase of the water collection tank reaches a predetermined pressure;
Maintaining all the vacuum generators in a stopped state when all of the plurality of remote control valves are in a closed state;
Resuming operation of the vacuum generator when at least one of the plurality of remote control valves is in an open state. The method according to any one of claims 6 to 11, comprising:
A method comprising: opening at least one remote control valve of the plurality of remote control valves without performing the step of comparing each other. The method of claim 12, comprising:
The step of opening the at least one remote control valve includes the step of opening the remote corresponding to the at least one liquid storage tank when the water level of at least one liquid storage tank of the plurality of liquid storage tanks exceeds a predetermined maximum allowable water level. A method comprising opening only the operating valve. The method of claim 12, comprising:
The step of opening the at least one remote control valve includes the step of opening the at least one manual operation means when at least one manual operation means among a plurality of manual operation means provided corresponding to the plurality of remote control valves is operated. Opening only the remotely operated valve corresponding to the means. The method of claim 12, comprising:
The step of opening the at least one remote control valve includes the step of opening at least one of the plurality of liquid storage tanks when a water level increase amount per unit time of at least one liquid storage tank exceeds a predetermined maximum allowable water level increase amount. Opening only the remotely operated valve corresponding to one liquid reservoir.

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