JP2005188239A - River purifying system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a river purifying system with largely reduced adverse influence by refuse and sludge pulled in from a river compared to a conventional system. <P>SOLUTION: This river purifying system purifies water taken in from the river, and is arranged in a waterway 1 for taking in the water from the river, and is provided with a dust collecting facility 3 for capturing the refuse flowing in the waterway 1. A rising flow generating device 6 for generating a rising flow along the dust collecting facility from a water bottom part, is arranged on the upstream side of this dust collecting facility 3. Slender string-like refuse can also be removed by a dust collector. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a river purification system that takes water from a river, purifies it, and discharges it into the river.

  The current river purification system draws in river water and purifies it, but a lot of garbage is floating in the river. The garbage is removed. After removing this waste, the river water is drawn into the purification tank and subsided, and then the river water is taken with the intake pump and sent to the filtration facility. In the filtration facility, dirty river water is filtered by chemical or biological filtration methods to make clean water, and then released into the river to promote purification of the river. (For example, refer to Patent Document 1).

  The problem here is that the amount of mud accumulated in the water intake tank varies depending on the concentration of river water. For example, when a water intake pump is automatically operated according to the water level of the water tank, the water level of the water intake tank is detected by a fruct level switch, etc., but the fruct level switch is buried in the accumulated sludge and stops even if the water level reaches the stop water level. The level may not be detected. In addition, sludge is sucked into the water intake pump by the operation of the water intake pump, and the sludge also moves, so the friction level switch also moves together with the sludge, and the water intake pump may stop due to erroneous detection of the stop level. When the intake pump is stopped, the water and sludge that have entered the pump pipe flow back to the intake tank, and the frit level switch moves together with the sludge, so that the operating water level is detected and restarted. As a result, the intake pump was frequently operated and stopped repeatedly, resulting in a burnout accident of the control device and a decrease in the life of the intake pump.

In addition, as described above, dust removal equipment is provided in the water intake channel from the river, but small dust or slender string-like dust that is difficult to remove with the dust removal equipment flows into the water intake tank through the dust removal equipment. For this reason, the intake pump and piping are clogged, and a lot of time and expenses are spent on regular inspections, which causes an increase in maintenance inspection management costs and complicated operator management.
Japanese Patent Laid-Open No. 10-8441

  In this way, dirt and sludge mixed in the water taken from the river causes clogging of the intake pump and piping, requiring a lot of time and management costs for maintenance, and the means for detecting the intake water level is Misdetection was caused by the accumulation of sludge, and the non-conformity that the intake pump repeated operation / stop frequently occurred. Furthermore, since the sludge accumulation state has not been detected so far, the water intake tank is cleaned using empirical data, which may be too early or too late. If there was a problem and it was too late, it was the cause of nonconformity due to sludge deposition as described above.

  An object of the present invention is to provide a river purification system in which adverse effects caused by garbage and sludge drawn from a river are greatly reduced as compared with the conventional art.

  The present invention is a river purification system that purifies water drawn from a river, and is provided in a water intake channel from the river, and a dust removal facility that captures dust flowing through the water channel, And an upward flow generating device for generating an upward flow along the dust removal equipment from the bottom.

  Further, in the present invention, a water storage tank that is formed in a cylindrical shape and that has a water passage opening from a river on its inner peripheral surface, and is provided on the inner peripheral surface of the cylindrical water storage tank, along the inner peripheral surface. You may make it the structure provided with the net-like dust removal member which captures the flowing underwater garbage.

  Moreover, in this invention, it has a water intake pump with which a suction inlet opens near the bottom part of a water intake tank, and you may install a mesh-shaped protective device around the said suction inlet of this water intake pump.

  Further, in the present invention, there is provided a means for detecting sludge accumulation level for measuring the accumulation level of sludge accumulated at the bottom of the water intake tank, and further provided with a reporting means for notifying the operator of the sludge accumulation level measured by this detection means. Also good.

  Moreover, in this invention, it is good also as a structure which provides the fluid ejection equipment which ejects a fluid to a water intake tank bottom part, and stirs the sludge accumulated in the water intake tank bottom part by the ejected fluid.

  Further, in the present invention, a configuration in which a frit level switch is used to detect the water level in the intake tank, and a pipe made of a soft material having a large number of washing fluid ejection holes is installed close to the rope holding the frit level switch. Good.

  Further, in the present invention, a flow path switching valve is provided in the discharge side piping of the water intake pump, one switching side is connected to the piping to the filtration facility, and the other switching side is connected to the piping to the sewage treatment facility, The discharge side may be switched to the sludge treatment facility side for a predetermined time from the start of operation of the intake pump, and switched to the filtration facility side after the predetermined time has elapsed.

  Furthermore, in the present invention, the intake pump may be configured to include a confirmation timer so that the operation / stop of the intake pump is controlled according to the water level of the intake tank, and the restart after the stop is executed after a lapse of a certain time from the stop.

  According to the present invention, it is possible to easily remove string-like elongated dust that has been difficult to remove so far, and clogging of a water intake pump and piping is reduced. For this reason, much time and management costs spent on maintenance can be reduced.

  In addition, if it is possible to detect sludge accumulation and report it to the operator, it will be possible to systematically clean the intake tank, so that it will not interfere with the operation of the intake pump as in the past, and loss due to nonconformity. Cost reduction and operator maintenance work are reduced.

  Moreover, if it is configured so that sludge does not accumulate easily, erroneous detection of the automatic operation water level of the water intake pump is eliminated, and the operation of the water intake pump is not hindered.

  In addition, when a friction level switch is used for water level detection, erroneous detection of the water level can be prevented by taking measures to improve the rigidity of the fixing rope.

  In addition, if a switching valve is provided on the discharge side of the intake pump so that water that contains a lot of sludge at the beginning of operation is switched to the sludge treatment facility, and water whose sludge is reduced is switched to the filtration facility, the filtration facility The amount of sludge flowing in can be reduced, and maintenance work due to clogging of filtration equipment can be reduced.

  Further, if the confirmation timer allows the restart after a certain time after the stop, the intake pump will not repeat the operation / stop frequently, and problems such as burnout of the control device and a decrease in the life of the intake pump can be solved.

  Hereinafter, an embodiment of a river purification system according to the present invention will be described with reference to the drawings.

  In the embodiment shown in FIG. 1, reference numeral 1 denotes a water channel, which is configured to flow a water intake 2 drawn from a river (not shown) into a water intake tank to be described later, and a dust removal facility 3 is provided at an intermediate portion in the flow direction. It has a mechanism that removes waste floating in the water intake 2. However, in the dust removal equipment 3 alone, the slender string-like dust flows along the flow direction of the water intake 2, so that it passes through the dust removal equipment 3 and flows into the water intake tank.

  Therefore, on the upstream side of the dust removal equipment 3, an upward flow generator 6 that generates an upward flow along the dust removal equipment 3 from the water bottom is provided. As shown in the figure, this upflow generator 6 is composed of an openable gate 6A provided at the lower back of the dust removal equipment 3, and a blower 6C that blows air 6B from the bottom of the water channel 1 at the front of the dust removal equipment 3. Is done.

  With this configuration, the water intake 2 flowing through the water channel 1 is once blocked by the openable gate 6A. In addition, air 6B is blown up from the bottom of the water channel 1 by the blower 6C at the front surface of the openable gate 6A (which is also the front surface of the dust removal equipment 3). Then, it passes over the open / close gate 6A while passing through the dust removal equipment 3. As described above, since the slender string-like waste also passes through the dust removal equipment 3 while being stirred together with the water intake 2, it is easily caught in the mesh of the dust removal equipment 3 and minimizes the amount of waste flowing into the water intake tank. be able to.

  Next, the embodiment shown in FIG. 2 will be described. A water intake tank is provided at the tip of the water channel 1 shown in FIG. 1, and the water 2 from which dust is removed flows through the dust removal equipment 3. Many conventional intake tanks 4 have a rectangular plane. In this case, the intake water 2 that has flowed in settles early, but sludge accumulates at the bottom due to fine dust contained in the intake water.

  Therefore, in this embodiment, as shown in FIGS. 2 and 3, the shape of the water intake tank 4 is a cylindrical shape with a circular planar shape, and an inflow port from the water channel 1 is opened on the inner peripheral surface thereof. The intake water 2 flowing in from 1 is configured to flow along the inner peripheral surface of the intake tank 4. The inner peripheral surface is provided with a plurality of net-like dust removing members 7 for capturing underwater dust flowing along the inner peripheral surface.

  As shown in FIG. 3, the bottom portion 4A of the water intake tank 4 has a shallow mortar shape, and a water intake pit 4B is formed at a substantially central portion thereof. Reference numeral 5 denotes a water intake pump, which is disposed near the bottom 4A of the water intake tank 4 (for example, in the water intake pit 4B) so that the suction port opens. Further, a net-like protective device 8 is installed around the suction port of the intake pump 5 to prevent the intake pump 5 from sucking sludge and fine dust.

  The intake pump 5 is automatically operated / stopped according to the water level of the intake tank 4. For detecting the water level, a friction level switch 9 that is not affected by water quality or the like is used. The friction level switch 9 is supported at the lower end of the rope 9B, moves up and down as the water level fluctuates, operates the built-in switch to detect the level, and has a signal line 9C for transmitting the detection signal. . The signal line 9C is connected to the water level detection circuit 9A, and detects the water level electrically.

  In the above configuration, the water intake tank 4 is cylindrical and the connection with the water channel 1 is inclined, so that the water intake 2 flowing in from the water channel 1 becomes a vortex and flows along the inner peripheral wall surface. Since a fine mesh-like dust removing member 7 is attached to the wall surface of the water intake tank 4, dust (including slender string-like dust) that could not be removed by the dust removal equipment 3 in the water channel 1 is cylindrical with the water intake 2. It flows as a vortex along the shape wall surface and is caught by the fine dust removing member 7 and can be easily removed.

  That is, in the conventional water intake tank, there was no means to remove even if garbage such as elongated strings that had passed through the dust removal equipment 3 provided in the water channel 1 entered the water intake tank, but the water intake layer 4 was made cylindrical. By flowing the water intake 2 along the inner peripheral surface, the dust that has entered the water intake tank 4 together with the water intake 2 can be removed by the dust removing member 7 provided on the inner peripheral surface of the water intake tank 4.

  The water intake pump 5 is operated when the water level in the water intake tank 4 becomes equal to or higher than a set value, and the water intake 2 in the water storage tank 4 is taken into a subsequent filtration facility (not shown). If the water level falls to the stop water level by the operation of the intake pump 5, the intake pump 5 is controlled to stop. During this pump operation, the dust and sludge that could not be removed by the dust removal equipment 3 and the dust removal member 7 try to enter the inside of the pump through the suction port of the intake pump 5, but around the suction port of the intake pump 5. Since the mesh-like protective device 8 is installed, it is possible to prevent sludge and fine dust from being sucked into the water intake pump 5.

  As a result, problems such as clogging due to suction of the sludge and sludge along with sludge, the capacity of the water intake pump, and increased maintenance of pipe cleaning can be greatly reduced compared to the past. Enables good pump operation.

  Next, the embodiment shown in FIG. 4 will be described. In this embodiment, sludge accumulation level detecting means 10 for measuring the accumulation level of sludge accumulated on the bottom of the intake tank 4 is provided. The water in the water intake tank 4 has been debris removed by the dust removal equipment 3 and the dust removal member 7 described above, but sludge 11 accumulates on the bottom 4A of the water intake tank 4 due to long-term use. Therefore, the sludge accumulation level detection means 10 is provided as described above, the detection signal (sludge concentration) is judged by the converter 10A, and the sludge accumulation level obtained thereby is reported to the operator.

  The installation level (detection level) of the sludge accumulation level detection means 10 is set to be equal to or lower than the emergency stop level that is the lowest level of the water level detected by the friction level switch 9. When the transducer 10A detects the accumulation state of the sludge 11 from the sludge concentration, a signal is transmitted to an operator notification device (not shown) to notify the operator of the accumulation abnormality of the sludge 11. As a result, the operator can take appropriate measures such as sludge removal.

  By performing such a treatment, the friction level switch 9 is not buried in the sludge 11, and appropriate automatic control of the intake pump 5 by always detecting a normal water level becomes possible.

  Next, the embodiment shown in FIG. 5 will be described. In this embodiment, a fluid ejection facility 12 that ejects fluid to the bottom of the water intake tank 4 is provided, and the sludge 11 deposited on the bottom of the water intake tank 4 is stirred by the ejected fluid. The fluid ejection device 12 includes a blower 12 </ b> A and an air pipe 12 </ b> B connected to the discharge side thereof. By operating the blower 12 </ b> A, air is ejected from the air pipe 12 </ b> B, and the sludge 11 accumulated at the bottom of the intake tank 4 is removed. Stir. The sludge 11 is periodically stirred so that the sludge 11 does not accumulate at the bottom of the water intake tank 4.

  When the sludge is stirred by air in this way, the sludge stirred and blown up flows along the inner peripheral surface of the water intake tank 4 together with the water intake 2 flowing from the water channel 1 and is captured and removed by the dust removing member 7. That is, the sludge agitation increases the dust and sludge removal effect by the dust removing member 7, and the fruct level switch 9 is not buried in the sludge 11. Thus, the automatic intake pump 5 can always be automatically controlled by detecting the normal water level. Become.

  However, while the sludge is being agitated with air, the fruct level switch 9 may move due to the agitation flow and malfunction. For this reason, the stirring time zone is provided with a mechanism for canceling the detection of the friction level switch 9 in an electric circuit.

  As described above, the friction level switch 9 is supported by the lower end portion of the rope 9B, moves up and down as the water level changes, and operates the built-in switch to detect the level. That is, as shown in FIG. 6, if the water level is low, the friction level switch 9 is lowered and the rope 9B is linear. On the other hand, if the water level rises, the friction level switch 9 also rises, and the rope 9B bends at the fixing bracket 13 portion as shown. A built-in contact (not shown) is turned on / off in response to the position change of the friction level switch 9, and the detection signal is output to the water level detection circuit 9A through the signal line 9C to detect the water level electrically.

  Because of this structure, it is important that the rope 9B is flexible in order to perform accurate water level detection. However, when used for a long time, the sludge component in the water intake tank 4 adheres, so that the stiffening of the rope 9B becomes prominent, which causes erroneous detection of the water level.

  Therefore, a pipe made of a soft material having a large number of cleaning fluid ejection holes is installed close to the rope 9B that holds the frit level switch 9 to prevent the rope 9B from becoming rigid. For example, as shown in FIG. 7, an air pipe 14A is inserted into the center of the rope 9B, and this is connected to the blower 14B as shown in FIG. Then, the blower 14B is periodically operated, the fixed rope 9B is washed with air (cleaning fluid) ejected from the air pipe 14A, and the attached sludge is cleaned to prevent the rope 9B from becoming rigid. As a result, it is possible to prevent erroneous detection of the water level due to the stiffening of the rope 9B.

  Next, the embodiment shown in FIG. 8 will be described. In this embodiment, the flow path switching valve 16 is provided in the discharge side pipe 15 of the intake pump 5 described above, one switching side is connected to the piping 15A to the filtration equipment, and the other switching side is connected to the sewage treatment equipment 15B. Connect to the piping to. Then, a predetermined time from the start of operation of the intake pump 5 is switched to the sludge treatment facility side piping 15B, and after the predetermined time has elapsed, the filtration facility side piping 15A is switched. That is, switching between the filtration equipment and the sludge treatment equipment is performed according to the amount of sludge sent from the water intake pump 5. Usually, at the initial stage of operation of the intake pump 5, the amount of sludge discharged is large, and the amount of sludge decreases after a certain amount of time has passed.

  For this reason, for a fixed time from the start of operation of the intake pump 5, the switching valve 16 selects the pipe 15B on the sludge treatment facility side, and the portion containing a lot of sludge is sent to the sludge treatment facility and treated as sludge. Thereafter, since the amount of sludge decreases after a certain period of time, the switching valve 16 is now switched to the piping 15A on the filtration equipment side, and normal river purification processing is performed by the filtration equipment. As a result, it is possible to reduce clogging of the filtration facility due to sludge.

  FIG. 8 shows an automatic operation flow of the water intake pump 5. When a predetermined operation condition is established (step 101) and the water level in the intake tank 4 reaches an operation level (step 102), the intake pump 5 is operated after a predetermined time delay by a timer (step 103). (Step 104). When the water level in the water storage tank 4 falls to the pump stop water level by this pump operation (step 105), the pump 5 is controlled to stop (step 106). In addition to this, the pump stop condition includes a case where the intake pump emergency stop water level is detected (step 107) and a failure occurrence is detected (step 108).

  Since it comprised in this way, even if it detects erroneously the water level of the intake tank 4 electrically, the phenomenon which the intake pump 5 repeats an operation | movement / stop frequently can be prevented electrically. That is, as explained in the prior art, when sludge is sucked into the water intake pump by the operation of the water intake pump 5, the friction level switch 9 also moves together with the sludge, so that the stop level is erroneously detected and the water intake pump 5 stops. May end up. When the intake pump 5 is stopped, the water and sludge that have entered the pump pipe flow back to the intake tank 4 and the fruct level switch 9 also moves together with the sludge to detect the operating water level. For this reason, the water intake pump 5 is restarted. As a result, there has been a problem that the intake pump 5 frequently repeats operation / stop.

  However, in the control of FIG. 9, when the intake pump 5 is stopped and automatically restarted, the confirmation timer is operated in step 103 and restarted after a certain period of time has elapsed. For this reason, the water intake pump is not restarted immediately, and the problem of frequently repeating the above-mentioned operation / stop does not occur.

It is a figure which shows one Embodiment of the river purification system by this invention. It is a top view which shows embodiment which improved the intake tank part in this invention. It is sectional drawing of the intake layer shown in FIG. It is a water intake tank sectional view which shows embodiment provided with the sludge accumulation level detection means in this invention. It is a water intake tank sectional view which shows embodiment provided with the accumulation sludge stirring apparatus in this invention. It is explanatory drawing of the friction level switch used for this invention. It is a perspective view explaining the detailed structure of the rope shown in FIG. It is explanatory drawing of embodiment which provided the switching valve in the discharge side of the intake pump in this invention. It is a flowchart explaining embodiment of the operation control of the intake pump in this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waterway 2 Water intake 3 Dust removal equipment 4 Water intake tank 5 Water intake pump 6 Upflow generator 7 Dust removal member 8 Protective device 9 Friction level switch 10 Sludge accumulation level detection means 11 Sludge 12 Fluid ejection equipment 14 for sludge agitation Piping 15 made of soft material having water intake pump discharge side piping 16 Flow path switching valve

Claims (8)

A river purification system that purifies water drawn from a river,
Dust removal equipment that is installed in the waterway that draws in from the river and captures the waste flowing through the waterway;
On the upstream side of this dust removal equipment, an upward flow generating device that generates an upward flow along the dust removal equipment from the bottom of the water,
A river purification system characterized by comprising: A river purification system that purifies water drawn from a river,
A water storage tank that is formed in a cylindrical shape and has a water channel that opens from a river on its inner peripheral surface;
A net-like dust removing member that is provided on the inner peripheral surface of the cylindrical water storage tank and captures waste in water flowing along the inner peripheral surface;
A river purification system characterized by comprising:   The river purification system according to claim 2, further comprising a water intake pump having a suction port opened near the bottom of the water intake tank, and a mesh-like protective device is installed around the suction port of the water intake pump.   3. A sludge accumulation level detecting means for measuring the accumulation level of sludge accumulated at the bottom of the water intake tank is provided, and a reporting means for notifying an operator of the sludge accumulation level measured by the detecting means is further provided. Or the river purification system of Claim 3.   The river purification system according to any one of claims 2 to 4, wherein a fluid ejection facility for ejecting fluid is provided at the bottom of the intake tank, and sludge accumulated at the bottom of the intake tank is stirred by the ejected fluid.   3. A fritted level switch is used for detecting the water level in the intake tank, and a pipe made of a soft material having a large number of cleaning fluid ejection holes is installed close to a rope holding the fritted level switch. The river purification system according to claim 5.   A flow switching valve is provided on the discharge-side piping of the intake pump, one switching side is connected to the piping to the filtration facility, and the other switching side is connected to the piping to the sewage treatment facility. The river purification system according to any one of claims 3 to 6, wherein the discharge side is switched to the sludge treatment facility side for a predetermined time, and is switched to the filtration facility side after the predetermined time has elapsed.   The intake pump is controlled to operate / stop according to the water level of the intake tank, and a restart timer after the stop is provided with a confirmation timer so as to be executed after a lapse of a certain time from the stop. River purification system.

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