JP2747754B2 - Sewage treatment apparatus and operating method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus and method for washing, crushing and dewatering sewage collected from a sewage treatment plant or the like, and performing stable treatment even if the properties of the sewage change. It relates to the driving method.

[0002]

2. Description of the Related Art The residue collected from a sewage treatment plant or the like has a high water content and contains a large amount of undissolved substances such as human feces, and cannot be dumped or incinerated in the recovered state. For this reason, the collected residue is washed by crushing lump such as human feces, and then dewatering and transporting the lump to perform the next process. Then, the treatment is performed by combining a pressing and washing apparatus for crushing and washing the uncrushed material of the residue and a dehydrating apparatus.

[0003]

The amount and properties of the residue collected from a sewage treatment plant and the like always vary. For this reason, conventionally, equipment having the ability to process the maximum amount of fluctuations in the amount of residue is provided. In particular, the processing capacity on the downstream side must always be equal to or greater than that on the upstream side, and the equipment as a whole becomes large and expensive. Further, in the process of pressing, washing and dewatering the residue, there is only one place where a chute capable of temporarily storing the residue is provided. For this reason, it is necessary to provide a margin for the processing capacity of the downstream dehydrator.

An object of the present invention is to provide an apparatus having a minimum necessary capacity and to be able to stably treat even the properties and amount of the residue.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above-mentioned object, and a residue chute is provided above a crushing washing machine having a roller and a press plate opposed to each other. A dehydrator chute provided with a level sensor is provided at the lower part of the chute, and a dehydrator for dehydrating the residue by a reciprocating motion of a plan in a dehydrating cylinder and supplying and transporting it into a transport duct is provided below the chute. That is the gist.

[0006]

[Function] The amount of residue passing through the crushing and washing machine is determined by the number of rotations of the roller.
It is determined by the pressing force of the press plate, and can supply a substantially constant amount to the dehydrator. However, even when the properties of the residue are not constant and the squeeze is not deformed during pressing, the residue is thrown in and the press plate is opened more than the set amount and the amount passing through the crushing and washing machine increases beyond the set amount. Since the crushing washer can be stopped temporarily when this amount reaches the set amount or more, the processing capacity of the downstream dehydrator must be equal to or greater than that of the upstream crushing and cleaning machine. Since there is no such equipment, it is possible to prevent the equipment from becoming unnecessarily large, and also to cope with fluctuations in the amount of residue, and to efficiently process the residue.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing the structure of a residue processing apparatus according to the present invention; In the figure, reference numeral 1 denotes a crushing and washing machine chute for supplying sewage collected from a sewage treatment plant, having an internal volume capable of temporarily storing a required amount of sewage,
When the set amount is reached, this is detected, and in order to prevent the residue from flowing out of the chute, the level sensor 11 for stopping the introduction of the residue is moved to the upper position of the chute. Crusher 2 under the chute 1
Is arranged.

In the crushing and washing machine 2, a squeezing roller 21, a press plate 22 facing the squeezing roller 21, and a washing nozzle 23 are disposed in a casing having a required size. The squeezing roller 21 is driven at a predetermined speed and direction, and the press plate 22 is curved in an arc shape. The gap between the lowermost end of the press plate and the roller is appropriately determined by squeezing the residue with the required pressure so that uncrushed and undissolved substances such as human droppings in the residue can be compulsorily crushed. In some cases, a press plate is attached to a roller so as to perform a separating motion and a means such as a cylinder for the separating motion is provided so that foreign substances can be quickly discharged when the foreign matter is caught.

Further, crushed human feces and the like are mixed in the residue pressed between the press plate 22 and the pressing roller 21. The washing water is jetted from the nozzle 23 toward the residue discharged from the space between the press plate and the roller in order to wash out the crushed human feces and the like.

The residue discharged from the crushing and washing machine 2 is supplied to a dehydrator chute 3 disposed below the crushing and washing machine 2. The inner capacity of the chute 3 is determined in accordance with the amount by which the plunger 5b of the dehydrator 5 can perform compression dehydration in one reciprocating motion, and connects the lower part of the casing of the crushing washer 2 and the upper end of the chute 3. A level sensor 31 is provided above the chute 3 for detecting the highest level of the residue put into the chute 3 and stopping the crushing and washing machine 2 so that no more residue is put into the chute 3.

A dehydrator is disposed below the chute 3 and is composed of a dehydrating cylinder 4 capable of draining dewatering.
And a dehydrator 5 comprising a plunger 5b reciprocating in the dehydrating cylinder 4 and a piston 5b for operating the plunger 5b. Accordingly, the lower end of the chute 3 is connected to a part of the dewatering cylinder 4 and the relationship between the chute and the dewatering cylinder is adjusted so that the residue in the chute 3 is dropped and supplied into the dehydration cylinder 4 at the retreat position of the plunger 5b. Determined.

A transport duct 7 for transporting the residue of the dewatering cylinder is connected to the distal end of the dewatering cylinder 4, and a back pressure plate 6 for applying pressure when the plunger advances to effectively dewater the residue.
Is swingably provided by a cylinder 9 to synchronize the swing of the back pressure plate 6 with the reciprocation of the plunger 5b.

The conveying duct 7 has a required inclination angle and height, and its tip is bent as shown in the drawing to discharge chute 8.
And

Next, a description will be given of a method of exercising the treatment by crushing, washing and dewatering the residue in the apparatus configured as described above. The residue collected by a sewage treatment plant or the like is introduced into a crushing and washing machine chute 1. This is a level sensor 1 which has a larger capacity than the dehydrator chute 3 and is provided at the top.
It can be turned on until the highest level is detected at 1. The residue put into the chute 1 is removed by a roller 21 and a press plate 22 of a crushing and washing machine 2 provided below the chute.
It is supplied between the rollers, and is gradually pressurized by the rotation of the roller 21, and the human feces and the like in the residue are crushed and washed with the washing water jetted from the nozzle 23 at the position discharged from the tip of the press plate. In addition, crushed human droppings are discharged and removed.

The washed residue is then put into a dehydrator chute 3. Since the lower end of the chute 3 is connected to the dewatering cylinder 4 so as to be electrically connected to the dehydration cylinder, when the plunger 5b in the dehydration cylinder retreats, the residue from the chute 3 is removed from the dehydration cylinder 4. It will be naturally dropped and supplied inside. When the plunger 5b is advanced while closing the back pressure plate 6 in this state, the residue in the dehydrating cylinder is pressurized and dehydrated. This separation and dewatering is drained from the drainage hole of the dewatering cylinder, and only the residue after dewatering is pushed into the transport duct 7 through the gap of the back pressure plate.

This operation is sequentially repeated to carry out dewatering and transport of the residue. In this case, if the processing capacity of the crushing and washing machine becomes larger than the processing capacity of the dehydrator due to fluctuations in the properties of the residue, etc. The amount of the residue is larger than the processing amount of the dehydrator and becomes a set value. When the level is detected by the level sensor 31, the crushing and washing machine 2 is stopped, and only the dehydrator is operated.
The residue filled in the chute 3 is subsequently dehydrated.
Then, when the amount of the accumulated residue in the chute 3 is no longer detected by the level sensor 31, the crushing washer 2 is driven again to perform a required operation.

Therefore, the crushing washer is rotated by the rotation of the roller.
The residue is sent between a roller and a press plate and squeezed to crush lumps such as human dung, and is washed away by spraying washing water. For this reason, the amount of residue passing through the crushing and washing machine is determined by the number of rotations of the roller and the pressing force of the press plate, and a substantially constant amount can be supplied to the dehydrator. However, even when the properties of the residue are not constant and the squeeze is not deformed during pressing, the residue is thrown in and the press plate is opened more than the set amount and the amount passing through the crushing and washing machine increases beyond the set amount. Temporarily stored in the chute,
When this amount exceeds the set amount, the crushing washer can be stopped.Therefore, it is not necessary to make the processing capacity of the downstream dehydrator equal to or greater than the processing capacity of the upstream crushing washer. It is possible to prevent an increase in size and to cope with fluctuations in the amount of residue, and to efficiently process the residue.

After the crushing and washing machine 2 is stopped, restarting is performed by setting a predetermined time with a timer, in which the residue in the dewatering machine chute is processed by the reciprocating movement of the plunger. Alternatively, a separate level sensor may be installed in the chute 3 to detect a decrease in the amount of residue in the chute and restart.

[0019]

According to the present invention, since the residue processing apparatus and the method of operating the same are constructed and operated as described above, the processing capacity of the dehydrator does not need to have a margin with respect to the processing capacity of the crushing and washing machine. In addition, the equipment can be downsized, and even if the properties of the residue fluctuate, it can be treated stably, and the amount of residue in the dehydrator input section is limited, so that the adverse effect of a decrease in the water content of the dehydrator is prevented. It has such advantages as possible.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a residue processing apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crusher washing machine chute 2 Crusher washing machine 21 Roller 22 Press plate 3 Dehydrator chute 31 Level sensor 4 Dehydration cylinder 5b Plunger 6 Back pressure plate 7 Transport duct

Claims (2)

(57) [Claims] 1. A debris chute is provided at the upper part of a crushing and washing machine having a roller and a press plate opposed to each other, and a dehydrator chute provided with a level sensor is provided at a lower part of the crushing and washing machine. A residue processing device provided with a dehydrator for dehydrating the residue by reciprocating a plunger in a dehydrating cylinder and supplying and transporting the residue into a transport duct. 2. A dewatering machine having a dewatering machine chute at the lower part of the crushing and washing machine, and a dewatering machine capable of temporarily storing the residue is disposed. When the capacity is exceeded, it is detected by the level sensor provided on the dehydrator chute, and only the crushing washer is temporarily stopped.
When the amount of residue in the dehydrator chute decreases from the set value during continuous operation of the dehydrator, the crushing washer is restarted to always respond to fluctuations in the properties of the residue, and thus, it is always stable. A method of operating a residue processing apparatus, wherein the method is adapted to perform a treatment.