JPS6145920Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is a compact and lightweight sludge that can be carried into a small site such as a back alley, and can be repeatedly subjected to self-suction concentration treatment at the site. It concerns enrichment vehicles.

Conventionally, sludge from septic tanks was collected using vacuum trucks and transported to a treatment plant for treatment, but vacuum trucks are usually large and difficult to enter the back of the street, and the sludge is directly sucked in without being concentrated, resulting in a reduction in the number of treatments. However, it has the disadvantage that the total amount of waste is large and transportation costs are high, and ocean dumping is difficult due to pollution regulations.On the other hand, when processing by composting, incineration, etc., the processing fee is
The drawback was that oil costs were high.

In view of the above-mentioned drawbacks, this idea has a simple configuration in which a condensate tank and a small drum screen are loaded on a vacuum car, which reduces the overall size of the vehicle, and also allows small tanks such as small individual human waste treatment tanks for home use to be installed in multiple locations at once. To provide a sludge thickening vehicle which can be cleaned and recovered by carrying it out, has a high concentration rate, and has good transport processing efficiency.

Next, drawings showing embodiments of the present invention will be described.

Raw solution tank 25 and thickened sludge tank 37 on the chassis
A flocculant tank 19 is installed on the upper left and right sides of the raw solution tank 25, and a thickener 30 made of a small drum screen is placed above the thickened sludge tank 37.

In the figure, reference numeral 1 is a transmission P/T/O that extracts power from the vehicle, and 2 is located inside the driver's seat.
The lever, 3 is a throttle that adjusts the engine rotation speed (pump rotation speed), and 4 is a vacuum pump that suctions (vacuums and pressurizes) sludge, and the one in the drawing shows a 4-blade rotary eccentric pump. .

A safety valve 5 is a valve for keeping the discharge pressure of the pump 4 constant so that abnormal pressure is not applied to the tank 25 when the pump 4 is pumping. 6 is a compound gauge that displays the pressure applied to each tank 25, 37 during suction and pressure feeding, 7 is a main manhole, and when the manhole is full, a float 7a in the hole pushes up the valve spindle 7b, and the valve seat 7c The vacuum pump 4 is crimped to block the air flow path, automatically stop suction, and prevent sludge from flowing into the vacuum pump 4.

8 is an air cleaner with a backflow prevention valve, and even if sludge flows in due to malfunction of the main manhole 7, it will be captured by the tank inside the cleaner 8, and if the sludge exceeds a certain amount, the internal float will floats up and is pressed against the valve seat, blocking the air flow path and automatically preventing sludge from flowing into the vacuum pump 4.

A check valve 9 prevents the vacuum pump 4 from idling due to back pressure when the vacuum pump 4 is stopped during operation, and maintains the pressure in the tank 25.

Reference numeral 10 denotes a suction/exhaust four-way valve that switches the air flow path of the vacuum pump 4 to perform both suction and pressure feeding operations.

Reference numeral 11 denotes an oil tank and separator, and since the vacuum pump 4 has a sliding part inside, it is constantly supplied with lubricating oil for operation, and the supplied lubricating oil is discharged from the vacuum pump 4 together with the exhaust gas. The oil contained therein is collected and stored here, and is again supplied to the vacuum pump 4 as lubricating oil. Reference numeral 12 denotes a deodorizer, which uses a deodorizing liquid to deodorize and exhaust the bad odor contained in the exhaust gas from the vacuum pump 4. 13 is a tank three-way valve, and this valve is used for suction and operation of the stock solution tank 25.
When performing pressure feeding and pressure feeding from the concentration tank 37, it is switched to one direction. Numeral 14 is a manhole check valve that prevents the sludge from being pumped through the manhole 7, and 15 is a pressure check valve that prevents sludge from flowing back from the pressure piping. Reference numeral 16 denotes a flow rate adjustment valve, which adjusts the amount of mud supplied to the thickener 30.

When using this machine as a normal vacuum car, fully open this valve 16. 17 is an auxiliary suction valve that sucks up the sludge to its full capacity, allowing subsequent suction of the flocculant. It is necessary to suction the agent, and this valve 17 is also opened during aeration and stirring to compensate. 18 is an aeration valve, which is connected to the auxiliary suction valve 17;
In conjunction with this, the sludge and flocculant are reacted by aeration and agitation.

19 is a flocculant tank, and two units may be installed on the left and right sides of the stock solution tank 25, and each unit may further have two chambers.

Since it is divided into left and right sides, it has a good balance, and the structure is simple because it can be flowed by the head.

Reference numeral 20 denotes a flocculant injection valve, which is opened during aeration and agitation of the stock solution tank 25 to suction and inject the flocculant.

Reference numeral 21 is a suction/discharge three-way valve that switches between the suction of sludge and the drainage of desorbed liquid. 22 is a hose reel that stores a hose 22a, and this hose 22a is used for suction and
One can be used for both drainage and drainage. 23 is a reel drive switch, which is pressed when winding up the hose.

24 is a reel drive lever, and the upper side of this lever is released. When set in this position, the reel becomes free and the hose can be freely pulled out. The bottom part is a connection and is used when winding up the hose or locking the reel. Reference numeral 25 denotes a raw solution tank for suctioning and storing septic tank sludge and reacting it with a flocculant.The cross section is wide and oval in the horizontal direction as shown in the figure to lower the center of gravity and to allow parts to be placed on top of the tank. It's easy.

Reference numeral 26 is a raw solution tank monitoring window, which is used to monitor the reaction state of sludge and flocculant, and is also used for maintenance and inspection inside the tank. 27 Raw solution level meter that indicates the amount of sludge sucked, 2
Reference numeral 8 denotes a slurry supply valve that is opened when mud is being fed under pressure to the thickener 30, 29 is a slurry feed transparent tube that monitors the state of mud supply to the thickener 30, and 30 is a thickener, which includes a rotating screen 30a and It consists of a water tank 30b and is arranged coaxially with the chassis axis, so it has a good left and right balance.It is also arranged inclined in the front and rear direction, and the opening of the tokuri-shaped drum is made small in diameter 30c, and the body of the tokuri-shaped drum is made in a large diameter. However, since this body is immersed in the water tank, a slight change in the angle of inclination will not change the excess area much, so there is no need for adjustment, and the structure of the cleaning device 30d for the screen 30a is similar to that shown in FIG. Since the baffles 30e are disposed opposite to each other so that the discharged water is dispersed in a planar manner, the discharge port of the cleaning device 30d is not clogged, so that the water accumulated in the water receiving tank 30b can be used for proper cleaning at all times. 31 is a concentrator drive switch that drives the concentrator 30 and at the same time turns on the automatic drainage pump and cleaning pump, which will be described later.
becomes.

A concentrator drive motor 32 rotates the internal drum of the concentrator 30. The concentration rate is adjusted by changing the rotation speed of the internal drum by changing the belt.

A cleaning pump 33 cleans the screen 30a of the internal drum to prevent clogging. 34 is a full drain valve that serves as a drain valve for the concentrator 30; 35 is a drainage tube that monitors the drainage state of the desorbed liquid; and 36 is a drain pump that returns the desorbed liquid from the concentrator 30 to the septic tank. Both automatic drainage using level control and independent drainage using the switch attached to the pump are possible. A thickened sludge tank 37 is integrated with the raw solution tank 25, is internally partitioned, and stores the thickened sludge discharged from the thickener 30. 38 is a thickened sludge tank monitoring window, which monitors the properties of thickened sludge and is also used for maintenance and inspection inside the tank.

39 is a thickened sludge level meter that indicates the accumulated amount of thickened sludge, 40 is a thickened sludge discharge valve that pumps and discharges the thickened sludge, and 41 is a undiluted sludge discharge valve.When this machine is used as a vacuum car to suck up human waste, etc. is used for gravity discharge or pressure-fed discharge from this valve. Reference numeral 42 denotes a gate valve, which is opened during concentration operation and closed during traveling and pressure-feeding and discharging.

Since the configuration is as described above, each operation will be explained next.

[Sludge suction] Park the machine near the septic tank with the engine running, set the change lever to neutral, depress the clutch pedal, move the P/T/O lever to the close position, and then release the clutch pedal. Gradually return the pressure, and now the vacuum pump 4 starts rotating.

The gate valve 42 is opened, the suction and discharge three-way valve 21 is set to the drain side, the tank three-way valve 13 is set to the stock solution tank 25, the suction and discharge four-way valve 10 is set to the suction side, and all other valves are closed.

Operate the throttle 3 lever and vacuum pump 4.
Gradually increase the rotation speed to the specified rotation speed.

Set the hose reel 22 lever to the release side, pull out the hose, insert it into the septic tank, set the suction/exhaust three-way valve 21 to the suction side, and start suction.

When a certain amount of suction is completed, the suction/exhaust three-way valve 21
to the drain side and stop suction.

The capacity of the stock solution tank 25 in this example is 1800,
If the amount of sludge suction exceeds this, the subsequent suction addition of flocculant and aeration agitation will not be possible, and the concentration process will not be possible. Therefore, while suctioning sludge, always monitor the raw liquid level meter 27 and do not allow it to be suctioned above 1800. do it like this.

[Flocculant addition and aeration stirring] The interlocking auxiliary suction valve 17 and aeration valve 18 are opened, air flows into the sludge at the same time, and aeration agitation begins.

Open the flocculant injection valve 20, inject the necessary amount of flocculant into the sludge, and after closing the flocculant injection valve 20, continue aeration and stirring for a while, and at this time monitor the floc formation state of the internal sludge through the raw solution tank monitoring window 26. do.

After a suitable floc is formed, the auxiliary suction valve 17 and the aeration valve 18 are closed to stop the aeration stirring, and the suction/exhaust four-way valve 10 is set to neutral.

The slurry supply valve 28 is gradually opened, and the stock solution tank 25 is
Release the internal vacuum.

[Concentration] Turn on the concentrator drive switch 31, rotate the screen 30a inside the concentrator 30, and set the suction/discharge four-way valve 10 to pressure feeding.

The amount of sludge to be pumped is determined by observing the sludge feed transparent tube 29,
The flow rate is adjusted using the flow rate adjustment valve 16.

When the sludge flows into the thickener 30 and the desorbed liquid exceeds a certain amount, the cleaning pump 33 is automatically activated.
Cleaning of the screen 30a is started, and the drain pump 36 also automatically starts draining water.

After a while, thickened sludge begins to fall from the opening of the thickener 30. If the thickened sludge is hard, increase the amount of sludge supplied slightly, and if it is soft, adjust the concentration rate by decreasing the amount of sludge supplied. Adjustment of the concentration ratio is carried out by changing the rotational speed of the drum. In this case, the suction/exhaust four-way valve is returned to neutral and mud feeding is temporarily stopped.

The capacity of the thickened sludge tank 37 is 600, and this amount is equivalent to 3 times when processing a standard septic tank (i.e. 1800 x 3 = 5400
This tank 37 can concentrate and store the sludge of ()).
To ensure that there is no overflow, the work should be stopped at a suitable point and returned to the base.

When the full amount of slurry supply is completed, the pressurized air in the stock solution tank 25 will escape and a sound will be produced, so the suction/exhaust four-way valve is set to neutral and the slurry supply valve is closed.

The screen 30a continues to rotate as it is for a while, and all the thickened sludge inside is discharged.

Open the full drain valve, turn on the full drain switch of the drain pump, and completely drain the desorbed liquid inside the concentrator 30.

Next, close the full drain valve, turn off the full drain switch, and then turn on the thickener drive switch 31 on the operation panel.
Turn OFF, return throttle 3, and let the engine idle.

Set the hose reel lever 24 to the connection position, turn on the hose reel switch 23, wind the hose, close the gate valve 42, depress the clutch pedal, and move the P/T/O lever 2 to the off position. Then run to the base.

[Force-feeding and discharging] As in the case of suction, put the P.T.O. lever 2 in contact, rotate the vacuum pump 4, and connect the thickened sludge discharge valve 40 to the equipment at the base with a hose.

The tank 3-way valve 13 is set to the concentration tank side, the suction/discharge 4-way valve 10 is set to the pressure feeding position, the throttle 3 lever is gradually raised, and when the pump 4 reaches a specified rotational speed, discharging begins.

When the discharge is completed, the suction/exhaust four-way valve 10 is returned to the neutral position, the throttle 3 lever is returned to low speed, and the P/T/O lever 2 is turned off.

[When used as a vacuum car] When the thickener 30 is not used, it can be used as a normal vacuum car. In this case, the sludge capacity that can be sucked is 1800, which is equivalent to a 2-ton vehicle class.

Set the tank three-way valve 13 to the raw sludge tank side, suck the sludge in the same way as when suctioning, and discharge the raw sludge through the raw sludge discharge valve 41.
Let's do it.

When discharging by force, follow the same procedure as when discharging by force. In this case, the flow rate regulating valve 16 is fully opened and closed to its original position after pressure feeding is completed.

In the compact sludge thickening vehicle of this invention with the above-mentioned configuration, the center of gravity of the tank is low, so the whole thickening vehicle is stable, and therefore, the flocculant tank can be mounted on the left and right sides separately at the front upper part of the tank. In addition, since the tank is divided, different types of flocculant can be filled separately, and the flocculant can be inserted in the middle of the suction pipe path and the suction force can be used to feed and stir the flocculant into the stock solution tank. It has the advantage of not requiring a separate supply pump or stirrer for flocculant, and since the thickness of the small drum screen differs depending on the cross section, there is little change in overarea even if the inclination angle changes slightly. It has the advantage that no adjustment is required, and since we decided to use super water as the washing water for the small drum screen, there is no need to separately install fresh water for washing, and it is also possible to specify the washing nozzle for this small drum screen. Because of the shape, there is no clogging of the injection nozzle, and since the liquid is pumped without using a pump to send the liquid to the drum screen, it has the advantage that the flocs in the liquid are less likely to break. The overall shape of the concentrator vehicle is downsized to enable cleaning and recovery of small tanks such as small individual human waste treatment tanks for home use by transporting them to a plurality of locations at one time, and the effect is that the concentration rate is high and the transport processing efficiency is improved.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view thereof, FIG. 2A is a right side view, FIG. 2B is a left side view, FIG. 3A is a rear view, and FIG. is a front view,
FIG. 4 is a simplified side view of the main part, FIG. 5 is an enlarged view of a part thereof, and FIG. 6 is an explanatory diagram of a part thereof. 19...Flocculant tank, 25...Standard solution tank,
30...Thickener, 37...Thickened sludge tank.

Claims (1)

[Scope of utility model registration request] A large-capacity stock solution tank and a small-capacity thickened sludge tank are integrated in the axial direction on the chassis, and a horizontally flat oval cylindrical tank is arranged in the same axial direction as the chassis. The raw solution tank is installed in front of the vehicle, and a flocculant tank is installed separately on the left and right in the upper part in front of the raw solution tank, and a thickener consisting of a small drum screen is installed above the thickened sludge tank of the tank. is arranged so that its rotation axis is in the same direction as the chassis axis, and the rotation axis of this small drum screen is rotatably supported at an angle with respect to the horizontal axis. The drum screen is formed into a circular shape and has blades wound around the inner peripheral wall of the small drum screen in a spiral shape, and a water receiving tank for superfluous water is provided at the bottom of the drum screen. A pipe is extended to a small drum screen via a pump, and a nozzle equipped with a diffuser plate with a variable inclination angle is attached to the tip of this pipe.
Connect the suction pipe of the pump installed on the vehicle chassis to the internal space of the stock solution tank, insert the supply pipe extending from the flocculant tank to near the bottom of the stock solution tank, and drain the stock solution to a position slightly lower than the bottom of the stock solution tank. A sludge thickening vehicle is provided with an outlet, a pipe connecting the raw solution discharge port to the drum screen, and a water absorption/drainage hose extending from the upper end of the raw solution tank.