JP3738319B2 - Sludge decompression levitation solid-liquid separation method and apparatus in septic tank sludge cleaning vehicle - Google Patents

Description

[0001]
[Industrial application fields]
The present invention inhales sludge from a septic tank, separates it into sludge and sewage, returns the sewage to the septic tank, etc., and makes it water, and sludge in a septic tank sludge cleaning vehicle that transports and discharges it to a sludge treatment plant. And a method for the same.
[0002]
[Prior art]
As is well known, a septic tank sludge cleaning vehicle called a vacuum car is used to clean the septic tank. However, a general vacuum car only sucks, transports and discharges sewage in the septic tank, and the sewage collected by the vacuum car. Is transported to a treatment plant, where water and sludge are separated at the treatment plant, and the sludge is solidified by incineration or cement to be blocked. However, the amount of sludge gradually increases and becomes a problem beyond the separation capacity of the treatment plant.
[0003]
In order to solve this problem, a septic tank sludge cleaning vehicle (see Patent Document 1) in which a sludge separation device is mounted on a vacuum car is considered. However, septic tanks for general households have a single septic tank that treats only sewage in toilets, and a combined septic tank that processes sewage in general domestic wastewater such as toilets, baths, and kitchens. In order to promote solid-liquid separation by changing the pressure in the tank, when treating sewage from a single septic tank with a small processing capacity in the same tank, sewage from a combined septic tank with a large processing capacity There is a problem that the efficiency is lower than the case of processing. In addition, there are more households using single septic tanks than ordinary households that are still using merged septic tanks, but merged septic tanks are becoming increasingly popular. Therefore, the advent of a vacuum car that can improve the efficiency of sewage treatment is desired.
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 7-17895 [Patent Document 2]
Japanese Utility Model Publication No. 59-51889
[Problems to be solved by the invention]
Therefore, the present invention intends to provide a septic tank sludge cleaning vehicle equipped with a device capable of efficiently treating sewage according to the type of septic tank.
[0006]
[Means for Solving the Problems]
The present invention has been made in order to solve the above-mentioned problems. The first aspect of the present invention is to provide a tank having two sludge agitation chambers in which an air diffuser provided with a diffuser is incorporated, a suction / discharge vacuum pump, A flocculant tank and a sludge separator, and the two sludge agitation chambers are connected to a suction / discharge vacuum pump via a three-way cock, and the flocculant tank is connected via a discharge cock and a check valve. An air intake cock is connected, the check valve is connected to the diffuser pipe through a discharge cock, and the sludge stirring chamber of the tank and the inlet of the sludge separator are connected through a three-way cock and a sewage cock. In the septic tank sludge cleaning vehicle in which a sludge discharge pipe is connected to the separated sludge outlet of the sludge separator, and a sludge suction / discharge pipe is connected to the separated sludge outlet of the sludge separator, in any of the sludge agitating chambers. Inhale sewage Then, fine air and condensate are jetted from the air diffuser into the sewage and stirred, and the sewage and the condensate are reacted by saturating the air in the sewage to form a flock, and then the tank is depressurized. The evacuated solid liquid of sludge in a septic tank sludge cleaning vehicle is characterized in that the air dissolved in the water is floated as a fine bubble by making a vacuum state, and the flock in the water is floated on the floating bubble attached Separation method.
[0007]
The second invention is a solid-liquid separator for sludge used in the implementation of the first invention, comprising a tank equipped with two sludge agitation chambers incorporating a diffuser tube provided with a diffuser, and a suction / discharge unit Equipped with a vacuum pump, a flocculant tank, and a sludge separator, the two tanks of sludge agitation chambers are connected to a suction / discharge vacuum pump via a three-way cock, and the agglomeration via a discharge cock and a check valve A liquid tank and an air suction cock are connected, the check valve is connected to the air diffuser through a discharge cock, and a sludge stirring chamber of the tank and an inlet of the sludge separator are connected to a three-way cock and a sewage cock. Sludge in a septic tank sludge cleaning vehicle, wherein a sludge discharge pipe is connected to a separation sludge outlet of the sludge separator, and a sludge suction / discharge pipe is connected to a separation sludge outlet of the sludge separator. Solid-liquid separation It is the location.
[0008]
According to a third aspect of the present invention, a cleaning pipe is provided on a check valve of an air intake / exhaust pipe connected to the tank of the solid-liquid separator according to the second aspect of the present invention.
[0009]
According to a fourth aspect of the present invention, an air discharge pipe for cleaning a permeation portion such as a viewing window or a sludge meter is provided in the tank of the solid-liquid separator according to the second aspect of the present invention.
[0010]
【Example】
FIG. 1 is a side view showing an overall schematic configuration of an embodiment of the present invention, wherein 1 is a tank provided with two large and small sludge agitating chambers 2 and 3 on the front and rear sides, and 8 is provided with a flocculated liquid tank 81 and a fresh water tank 82 A tank, 9 is a sludge separator, and 35 is an operation panel.
[0011]
2 is a piping diagram of the embodiment, 4 is a known vacuum pump, 5 is a drain separator, 6 is a sub-separator, 7 is a main separator, 12 is a deodorizer, the inlet side of the vacuum pump 4 is the drain separator 5, It is connected to the sludge agitation chambers 2 and 3 via an intake / exhaust switching cock 13, a three-way cock 14, and two-way cocks 15, 16 and 17. The two-way cock 16 also serves as an adjustment valve.
[0012]
The sludge agitation chambers 2 and 3 are connected to the inlet side of the sludge separation device 9 through the three-way cock 18 and the sewage cock 21, and are connected to the sludge suction pipe 33 connected to the hose reel through the three-way cocks 19 and 20. ing. Further, it is connected to a sludge discharge pipe 34 via a discharge cock 22.
[0013]
The sludge agitation chambers 2 and 3 are connected to the outlet of the separation sludge 92 of the sludge separation device 9 via the three-way cocks 19 and 20 and the discharge cock 23, and the three-way cocks 19 and 20, the discharge cock 24, the check valve 98 and the auxiliary valve. The pump 95 is connected to the outlet of the separated sludge 93 of the sludge separator 9.
[0014]
The air diffusers 36, 36 provided in the sludge agitation chambers 2, 3 are connected to the flocculated liquid tank 81 through the discharge cocks 28, 29, the check valve 27 and the discharge cock 25. An air intake cock 26 is connected between the check valve 27 and the discharge cock 25 via a check valve 27 ′.
FIG. 3 shows the diffuser attached to the tip of the diffuser pipe 36 connected to the sludge agitation chambers 2 and 3, and FIG. 3 (a) is a partially cutaway side view of the diffuser, showing the main body of the diffuser. 37, the cylinder 40 is sandwiched between an upper portion 38 and a bottom portion 41 provided with an attachment portion 39 for screwing the diffuser pipe 36, and attachment holes 42, 42, 42 and discharge holes 43, 43, 43, provided in the upper portion 38 and the bottom portion 41, respectively. 43, 43, 43, 43, 43, 43 are fixed with bolts 44, 44, 44 and nuts 45, 45, 45 communicating with the discharge holes 43, 43, 43 corresponding to the mounting holes 42, 42, 42. Configured. Then, as shown in FIG. 3 (b), air and condensate sucked from the air suction cock 26 through a plurality of discharge holes 43, 43, 43, 43, 43, 43 provided in the bottom 41 of the main body 37 during decompression. The condensed liquid in the tank 81 is mixed through the discharge cock 25 and injected into the sewage or sludge in the sludge agitation chambers 2 and 3.
[0016]
Further, when the sludge flows backward from the exhaust hole 43 and enters the main body 37, if the bolt 44 and the nut 45 are removed, the main body 37 is decomposed into three parts, ie, an upper portion 38, a cylinder 40, and a bottom portion 41, and the sludge can be easily removed. In addition, since no welding is required, the manufacturing cost is low and the assembly is easy. 30 is a compound meter.
[0017]
The sludge separation device 9 is provided with the separation screen 91 inclined, and the outlet of the separated sewage 93 is useful when discharging to a high place. The auxiliary pump linked with the drive system of the vacuum pump 4 and the electromagnetic clutch 4 '. 95, the check valve 98 and the discharge cock 24, and the sludge suction pipe 33 and the three-way cocks 19 and 20 are connected to the sludge agitation chambers 2 and 3. 10 is a septic tank, 11 is a treatment plant, 22 is a discharge cock, 31 and 32 are sludge meters and observation windows equipped with air discharge pipes 31a and 32a for removing sludge from sticking. When the valves of the air discharge pipes 31a and 32a are opened in a reduced pressure state, sludge can be blown off by inhaling air. 94 and 99 are cleaning nozzles for cleaning the separation screen 91 and the upper plate 90 connected to the fresh water tank 82 via the three-way cock 97 and the pump 96.
[0018]
Although omitted because the drawing becomes complicated, the activation of the vacuum pump 4 and the opening and closing of each cock are configured to be controlled via an electric circuit operated by a lever or a switch provided on the operation panel 35. Each cock can be opened and closed manually.
[0019]
FIG. 4 is a partially cut-away side view showing a manhole connecting an air intake / exhaust pipe 48 provided at the upper part of the sludge agitating chambers 2, 3. The stop valve 47 is pushed up to close the valve port 50 and prevent sludge from entering the air intake / exhaust pipe 48. A plurality of convex portions 51 that support the check valve 47 are provided at the lower opening of the manhole 46 so that the check valve 47 does not hinder the intake and exhaust of air. 49 is a cleaning pipe for containing cleaning water to prevent the check valve from functioning due to dirt or the like, so that the check valve can be cleaned without removing the manhole 46 from the sludge stirring chambers 2 and 3. It is a thing.
[0020]
Next, an embodiment of the present invention, that is, a method of using the septic tank sludge cleaning vehicle and its operation will be described.
[0021]
When the sewage water and sludge in the septic tank 10 are sucked into the sludge stirring chamber 2, the lever of the operation panel 35 is moved after the vacuum pump 4 is operated, and the three-way cock 14 and the intake / exhaust switching cock 13 are switched as shown in FIG. At the same time, the three-way cocks 18, 19, and 20 are switched as shown in FIG.
[0022]
As a result of this operation, the air in the sludge agitation chamber 2 flows from the three-way cock 14 → the intake / exhaust switching cock 13 → the drain separator 5 → the vacuum pump 4 → the sub-separator 6 → the main separator 7 → the two-way cock 16 → the intake and exhaust. It is exhausted by the vacuum pump 4 through the path of the switching cock 13 → deodorizer 12, and the sludge agitation chamber 2 is depressurized. Therefore, the sludge and sludge in the septic tank 10 are sludge intake / exhaust pipe 33 → the three-way cock 20 → the three-way cock 19. And is sucked into the sludge stirring chamber 2.
[0023]
If sewage and sludge are sucked into the sludge stirring chamber 2 from the septic tank 10 by the above operation, then the three-way cocks 19 and 20 are switched to open the discharge cock 25, the air suction cock 26 and the discharge cock 28 as shown in FIG. When the sludge stirring chamber 2 is depressurized by operating the pump 4, the condensed liquid and air in the condensate chamber 81 are discharged into the discharge cock 25, the air suction cock 26, the check valves 27 and 27 ', and the discharge cock. 28 through the diffuser main body 37 (see FIG. 3) attached to the diffuser pipe 36 and the diffuser main body 37 (see FIG. 3) into the sludge agitating chamber 2, and the sludge is mixed with the fine air mixed coagulated liquid discharged from the discharge hole 43. The sewage and sludge sucked into the agitation chamber 2 are agitated, and the sludge is agglomerated by reaction with the agglomerated liquid within 1 to 3 minutes from the start of decompression, and the water in the water becomes saturated.
[0024]
After completion of the reaction, when the air dissolved in the water becomes fine bubbles and rises on the water surface, the sludge can be separated into solid and liquid by raising the water flocs together to the water surface. By this method, the processing time can be reduced to 1/3 compared with the conventional solid-liquid separation by pressurization.
[0025]
As shown in FIG. 7, next, the three-way cock 14 is switched, the two-way cock 17 is opened, the three-way cock 18 is switched, and the sewage cock 21 and the discharge cock 23 are switched. open. From this operation, as shown by arrows in FIG. 7, the vacuum pump 4 → the sub separator 6 and the main separator 7 → the two-way cock 17 → the sludge stirring chamber 2 → the three-way cock 18 → the sewage cock 21 → the sludge separation device 9 → the discharge cock 23 → three-way cock 20 → three-way cock 19 → sludge stirring chamber 3 → three-way cock 14 → intake / exhaust switching cock 13 → drain separator 5 → flow path of vacuum pump 4, vacuum pump 4 → sub-separator 6, main separator 7 → two-way cock 16 A flow path of the intake / exhaust switching cock 13 → deodorizer 12 is formed, and the mixed sludge in the sludge stirring chamber 2 is transferred to the sludge separation device 9 and separated into the separated sludge 92 and the separated sludge 93, and the separated separated sludge 92 is separated. Is sucked into the sludge stirring chamber 3 through the discharge cock 23 and the three-way cocks 20 and 19. On the other hand, the separated sewage 93 is returned to the septic tank 10 through the auxiliary pump 95, the discharge cock 24, and the sewage intake / exhaust pipe 33, and is reused as part of the tension water.
[0026]
When cleaning a large number of septic tanks, the above operation is repeated until the sludge agitation chamber 3 is in a full tank state, and the sludge is cleaned by each septic tank cleaning as shown in FIG. To the sludge separator 9. However, there may be a slight amount of sludge remaining in the sludge agitating chamber 2 at this time, and this residual sludge with low moisture accumulates every time the treatment is performed. Processing capacity is reduced.
[0027]
In this case, as shown in FIG. 8, when the three-way cocks 14, 18, and 19 are switched, the discharge cock 28 and the air suction cock 26 are opened, and the sludge stirring chamber 3 is decompressed, air is taken in from the air suction cock 26, The residual sludge in the sludge agitation chamber 2 is loosened by the air discharged from the diffuser through 36 and the loosened sludge in the sludge agitation chamber 2 is transferred to the sludge agitation chamber 3 through the three-way cock 18. The processing capacity of the stirring chamber 2 can be returned to the original state.
[0028]
The series of operations described above is for draining sewage and filth from a single septic tank only for toilet drainage, but in the case of a combined septic tank that treats domestic wastewater from toilets, baths, and kitchens in general households, a sludge agitation chamber is used. 3 inhales the sewage and sludge from the septic tank 10. In this case, the three-way cocks 14, 18, and 19 are switched as shown in FIG. Then, as shown in FIG. 10, the discharge cock 29 is opened, and the air mixed coagulated liquid is added to perform sludge separation. After completion of the sludge separation operation, as shown in FIG. 11, the two-way cock 15 is opened and the three-way cocks 18 and 19 are switched to transfer the mixed sludge to the sludge separator 9 and the separated sludge 92 is sucked into the sludge agitation tank 2. Further, in the same manner as when the residual sludge in the sludge agitation tank 2 shown in FIG. 8 is transferred to the sludge agitation tank 3, the three-way cocks 14 and 19 shown in FIG. The residual sludge in the sludge agitation tank 3 can be transferred to the sludge agitation tank 2 by closing, opening the discharge cock 29 and depressurizing the sludge agitation tank 2.
[0029]
When sucking into the sludge agitation tanks 2 and 3 simultaneously, the three-way cocks 14 and 19 can be fully opened as shown in FIG. Similarly, when discharging to the sludge agitation tanks 2 and 3 simultaneously, as shown in FIG. 13, the suction / discharge switching cock 13 and the three-way cock 20 are switched, the two-way cock 22 is opened, and the sludge agitation chambers 2 and 3 are pressurized. Sludge can be discharged to the sludge treatment plant 11.
[0030]
The operation and cleaning of the sludge separation device 9 is performed by the sludge separation device 9 of the embodiment separating the sludge by the screen 91. The sludge dropped on the upper plate 90 through the sludge cock 21 falls on the screen 91 and is separated. It is separated into sludge 92 and separated sewage 93. If sludge is stuck on the upper plate 90 or the screen 91 is clogged, the auxiliary pump 96 is operated during the sludge separation operation shown in the figure to switch the washing cock 97 and from the washing water nozzle 82 through the washing nozzle 94. The fresh water is jetted onto the screen 91 and the fresh water is jetted from the washing nozzle 99 onto the upper plate 90 so as to blow off the adhering sludge.
[0031]
When the diffuser discharge hole 43 is clogged with sludge, the two-way cock 28 'or the two-way cock 29' is opened as shown in FIG. 14 or 15, and the sludge stirring chamber 3 or the sludge stirring chamber 2 is opened. By reducing the pressure, the sludge in the diffuser is sucked into the sludge agitating chamber 3 or 2 to eliminate clogging of the discharge hole 43.
[0032]
The tank 1 of the embodiment described above has two large and small sludge agitation chambers 2 and 3 arranged side by side, but is not limited to this structure, and may be provided vertically.
[0033]
【The invention's effect】
According to the present invention, the two tanks are made into a sludge agitation chamber, so that they can be used efficiently according to the type of septic tank. Further, it is possible to easily perform processing such as loosening of residual sludge in the sludge stirring chamber, transfer to another sludge stirring chamber, or discharge. Furthermore, it is possible to easily clean the check valve, the observation window and the sludge meter of the dirty air intake / exhaust pipe.
[Brief description of the drawings]
FIG. 1 is a schematic side view of an embodiment of the present invention.
FIG. 2 is a piping diagram of an embodiment of the present invention.
3A and 3B are diagrams showing an embodiment of a diffuser according to the present invention, in which FIG. 3A is a partially cutaway side view, and FIG. 3B is a bottom view.
FIG. 4 is a partially cutaway side view showing an example of a check valve according to the present invention.
FIG. 5 is an explanatory diagram of sludge inhalation.
FIG. 6 is an explanatory diagram at the time of injecting the flocculant and stirring the injected sludge.
FIG. 7 is an explanatory diagram at the time of sludge separation.
FIG. 8 is an explanatory diagram when residual sludge is treated.
FIG. 9 is an explanatory view of another sludge inhalation.
FIG. 10 is an explanatory diagram at the time of other sludge separation.
FIG. 11 is an explanatory diagram during sludge separation.
FIG. 12 is an explanatory diagram of simultaneous or alternating suction operation.
FIG. 13 is an explanatory diagram of simultaneous or alternating discharge operation.
FIG. 14 is an explanatory view of the diffuser when inhaling sludge.
FIG. 15 is an explanatory diagram of sludge inhalation by another diffuser.
[Explanation of symbols]
1,8 tanks
2, 3 Sludge mixing chamber
4 Vacuum pump
4 'electromagnetic clutch
5 Drain separator
6 Sub-separator
7 Main separator
81 Condensate tank
82 Shimizu room
9 Sludge separator
10 Septic tank
11 Sludge treatment plant
12 Deodorizer
13 Intake / exhaust switching cock 14, 18-20 Three-way cock
15-17 Two-way cock
21 Sewage cock 22-25, 28, 29 Discharge cock
26 Air intake cock 27, 27 ', 98 Check valve
30 compound meters
31 Sludge meter
32 Viewing window
33 Sludge intake and exhaust pipe
34 Sludge discharge pipe
35 Operation panel
36 Diffuser
37 Diffuser body
43 Discharge hole
46 Manhole
47 Check valve
48 Air intake and exhaust pipe
49 Cleaning tube
90 Upper plate
91 screens
92 Separation sludge
93 Separated sewage
94,99 Washing nozzle
95,96 Auxiliary pump
97 Washing cock

Claims (4)

Equipped with a tank equipped with two sludge agitation chambers with a diffuser and a diffuser, a vacuum pump for suction and discharge, a flocculated liquid tank, and a sludge separator. Connected to the suction / discharge vacuum pump via the cock, connected to the flocculant tank and the air suction cock via the discharge cock and check valve, and connected the check valve to the diffuser pipe via the discharge cock. And connecting the sludge stirring chamber of the tank and the inlet of the sludge separator via a three-way cock and a sludge cock, and connecting a sludge discharge pipe to the separated sludge outlet of the sludge separator, in the separation sewerage outlet of the separation device septic tank sludge sweeper connecting the sludge intake pipe, the sucked sewage to one of sludge stirring chamber, thereby ejecting fine air and condensate from the aeration tube in the sewage Stirring After reacting the with sewage condensate to form a floc in the air saturated in Rutotomoni sewage, is floated air was dissolved in the water by the vacuum reducing the pressure in the tank as fine bubbles And a method for separating sludge under reduced pressure in a septic tank sludge cleaning vehicle, characterized in that an underwater floc adhering to the rising bubbles is levitated. Equipped with a tank equipped with two sludge agitation chambers with a diffuser and a diffuser, a vacuum pump for suction and discharge, a flocculated liquid tank, and a sludge separator. Connected to the suction / discharge vacuum pump via the cock, connected to the flocculant tank and the air suction cock via the discharge cock and check valve, and connected the check valve to the diffuser pipe via the discharge cock. And connecting the sludge stirring chamber of the tank and the inlet of the sludge separator via a three-way cock and a sludge cock, and connecting a sludge discharge pipe to the separated sludge outlet of the sludge separator, A sludge solid-liquid separator in a septic tank sludge cleaning vehicle, characterized in that a sludge intake / exhaust pipe is connected to the separation sewage outlet of the separator.   3. A sludge solid-liquid separator in a septic tank sludge cleaning vehicle according to claim 2, wherein a cleaning pipe is provided on a check valve of an air intake / exhaust pipe connected to the tank.   3. The sludge solid-liquid separation device in a septic tank sludge cleaning vehicle according to claim 2, wherein an air discharge pipe for cleaning a permeation part such as a sight glass and a sludge meter is provided in the tank.

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