JPH11117381A - Removing device for fibrous decomposition retardant material contained in sanitary sewage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a removing device for a fibrous decomposition retardant material contained in sanitary sewage to perform stable disposal of sanitary sewage by efficiently arresting and removing only a fibrous decomposition retardant material, contained in sanitary sewage, through a simple means. SOLUTION: An endless cable 3 made of a shape memory alloy is stretched in a manner to effect circulation drive between sheaves 21 and 22 arranged in a position above a water tank 1, where sanitary sewage is circulated, and in a water tank. In a position above the water tank 1, and a cable 3 in a shape 3a wherein a fibrous decomposition retardant material is easily arrested by shape deforming means 23 and 24 for a cable is deformed into a linear state 3b. Thereafter, the fibrous decomposition retardant material arrested by the cable 3 is removed by an arrested material removing means 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing fibrous hardly decomposable substances contained in sewage, and more particularly to a fibrous hardly decomposable substance contained in sewage flowing into a small-scale sewage treatment plant. The present invention relates to a device for reliably capturing and removing by simple means.

[0002]

2. Description of the Related Art Conventionally, sewage flowing into a sewage treatment plant includes:
In addition to lump-like degradable substances such as human dung and kitchen waste, lump-like degradable substances such as plastic lump, wood chips and empty cans, and fibrous refractory substances such as hair (in this specification, simply referred to as "fibrous In some cases, small-scale sewage treatment plants provide a simple method for removing lumpy hard-to-decompose substances from sewage. Only dust removal means were installed.

[0003]

As the dust removing means, among the substances contained in the sewage flowing into the sewage treatment plant, lumps of hardly decomposable substances are captured and removed, and lumps of lumpy degradable substances are crushed. However, those which are configured to be introduced into the treatment tank together with the sewage are mainly used. However, this dust removing means cannot capture and remove fibrous hardly decomposable substances, and these fibrous Has been problematic in that the hardly decomposable substance is entangled with a sensor or a pump installed in a treatment tank or in a subsequent process, causing a malfunction of the sensor or a decrease in the processing capacity of the pump, thereby hindering sewage treatment. .

In order to address this problem, a very fine screen, for example, a mesh width of 2 is used for the screen of the dust removing means.
It is also conceivable to use a screen of about mm, but in this case, a large amount of decomposable substances such as human feces and kitchen garbage are captured together with the hardly decomposable substance by the dust removing means, and the captured residue is collected inside the dust removing means. Due to decay, it is difficult to sanitarily treat the captured residue, and even with such a fine screen, fibrous hardly decomposable substances could not be completely removed. .

[0005] In view of the above-mentioned problems of the conventional sewage treatment plant, the present invention provides a stable method by efficiently capturing and removing only fibrous hardly decomposable substances contained in sewage by simple means. It is an object of the present invention to provide an apparatus for removing fibrous hardly decomposable substances contained in sewage, which can perform sewage treatment.

[0006]

In order to achieve the above object, the apparatus for removing fibrous hardly decomposable substances contained in sewage of the present invention is installed at a position above a water tank through which sewage circulates and in the water tank, respectively. An endless cable made of a shape memory alloy stretched between sheaves and circulated, and disposed below a sheave installed above the water tank, and circulated to be moved to a position above the water surface. A scavenging substance removing means for removing the fibrous hardly decomposable substance trapped by the cable; and a straight line formed in a shape in which the fibrous hardly decomposable substance is easily captured at a position near the scavenging substance removing means. And a means for deforming the shape of the cable to be formed into a shape. here,
"The shape in which the fibrous hard-to-degrade material is easily captured" means that the fibrous hard-to-degrade material that has caught on the rope, such as a helical shape other than a straight line, a wavy shape, or a saw blade, slips from the wire. A shape that does not fall and is difficult to separate.

The apparatus for removing fibrous hard-to-decompose substances contained in sewage is provided by extending endless ridges between sheaves installed in the tank above the tank in which the sewage circulates and in the tank. Part of the strip is immersed in the sewage, and the fibrous indegradable substance contained in the sewage circulating in the water tank is hooked on the strip, and the strip is intermittently or continuously driven to circulate. Thus, the fibrous hardly decomposable substance caught on the cable is pulled up on the water surface, and at this position, the fibrous hardly decomposable substance captured on the cable by the trapping substance removing means is removed. In this case, the endless cable that is driven by circulation to capture the fibrous hard-to-decompose material is made of a shape memory alloy, and the fibrous hard-to-decompose by the wire shape deforming means near the trapped substance removing means. In order to prevent the detachment of the fibrous hard-to-decompose substances caught on the cords, the fibrous hard-to-decompose substances are placed on the water surface because the straight lines with the shape in which the insoluble substances are easily trapped are prevented. And the fibrous hardly decomposable substance trapped on the cord by the trapping substance removing means can be easily removed.

[0008] In this case, the cable can be configured to be spiral in the sewage.

Thus, the rope can be easily deformed from a helical shape to a linear shape by the wire shape deforming means (the same applies to the case where the rope is deformed from a linear shape to a helical shape), and the rope is hooked on the rope. When the fibrous hardly decomposable substance is pulled up on the water surface, it is possible to reliably prevent the fibrous hardly decomposable substance from coming off.

[0010] Further, the trapping substance removing means can be constituted by a washing nozzle for jetting washing water.

[0011] Thus, the captured fibrous hardly decomposable substances can be easily removed by the washing water jetted from the washing nozzle.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the apparatus for removing fibrous hardly decomposable substances contained in sewage of the present invention will be described below with reference to the drawings.

1 to 3, the apparatus for removing fibrous hardly decomposable substances contained in sewage of the present invention is applied to a treatment tank (water tank) 1 used in sewage treatment equipment of a small-scale sewage treatment plant. An example is shown below. As shown in FIG. 3, the sewage treatment equipment of this small-scale sewage treatment plant includes, as shown in FIG. 3, various substances discharged from homes and the like, that is, lump-sum degradable substances such as human dung and kitchen garbage, plastic lump, It is for biological treatment of sewage containing bulky indegradable substances such as wood chips and empty cans and fibrous indegradable substances such as hair. This sewage is firstly screened from a pump pit P of a sewage treatment plant. Is introduced into the dust removing device 5 provided, and collects and removes lump-like insoluble substances such as plastic lump, wood chips, empty cans and the like, and lump-up leachable substances such as human dung and kitchen garbage contained in sewage are pulverized. Then, the wastewater is introduced into the treatment tank 1 together with the wastewater, and is biologically treated.

The treatment tank 1 into which the sewage is introduced is configured so that the sewage is circulated naturally by the introduction of the sewage or forcibly by a stirrer, an aerator 6 or the like.

By the way, the sewage introduced into the treatment tank 1 includes degradable substances such as crushed human dung and kitchen garbage,
It contains fibrous hard-to-decompose substances such as hair, and these fibrous hard-to-decompose substances are entangled with sensors and pumps installed in the processing tank 1, causing malfunctions of the sensors and deterioration of the processing capacity of the pump. And cause a problem in sewage treatment.

In order to capture and remove the fibrous hardly decomposable substance, the treatment tank 1 is provided with a fibrous hardly decomposable substance removing device 2. The apparatus 2 for removing fibrous hard-to-decompose substances is installed on the treatment tank 1 through which sewage circulates, and the upper sheave 21 is placed above the treatment tank 1.
Each of the lower sheaves 22 is set in the
The shaft is made of a shape memory alloy flexible wire by rotating it intermittently or continuously by a drive source (not shown) such as a motor, and a part of the wire is immersed in sewage. And stretched between both sheaves 21 and 22,
An endless cable 3 for catching fibrous hardly decomposable substances contained in sewage circulating in the inside is driven to circulate.

In this case, the rope 3 made of a shape memory alloy has a shape 3a in which a fibrous hardly decomposable substance is easily trapped in sewage, for example, a helical shape other than a linear shape, a wavy shape, a saw blade shape or the like. This makes it possible to reliably prevent the fibrous hard-to-decompose substance from detaching when the fibrous hard-to-decompose substance caught on the rope is pulled up on the water surface. To For this reason, the rope 3 is configured to have a required shape other than the linear shape at the temperature of the sewage.
In the present embodiment, the cable 3 is formed in a spiral shape, but by this, the cable 3 is straightened from the spiral 3a by the cable shape deforming means 23, 24 described later. 3b can be easily deformed (the same applies to the case where the shape is changed from a linear shape to a spiral shape).

At a position below the upper sheave 21 installed above the treatment tank 1, the fibrous hard-to-decompose substance caught on the rope 3 by circulating the rope 3 is placed on the water surface. At this position, a washing nozzle 41 and a trash receptacle 42 as a trapping substance removing means 4 for removing the fibrous hardly decomposable substance trapped by being hooked on the rope 3 are installed. In this case, the rope 3 deformed from the spiral 3a to the linear 3b by the rope shape deforming means 23, 24 described below does not return to the spiral shape by the action of the temperature of the washing water injected from the cleaning nozzle 41. Then, the temperature of the washing water is set to a temperature different from the temperature of the sewage (for example, hot water higher than the temperature of the sewage is used for the washing water).

At a position near the trapping substance removing means 4,
A cord 3 having a shape 3a in which a fibrous hardly decomposable substance is easily captured.
A heating device 23 (see FIG. 1 (A)) or a stretching roller 24 (see FIG. 1 (B)) is provided as means for deforming the cable 3 so as to form a straight line 3b. In this manner, by forming the cable 3 in a straight line 3b in the vicinity of the trapping substance removing means 4, the fiber 3 is prevented from being detached from the fibrous hardly decomposable substance caught on the cable 3 while the fiber 3 is being separated. Can be pulled up on the water surface, and the fibrous non-degradable substance trapped on the cable 3 by the trapping substance removing means 4 can be easily removed.

Further, as shown in FIG.
, A pressing roller 25 formed of elastic rubber or soft synthetic resin is disposed to face the upper sheave 21.
And the holding roller 25 sandwiches the rope 3,
The frictional resistance at the position of the upper sheave 21 is increased, and the fibrous hard-to-degrade material trapped by the rope 3
Even if tension is applied, the rope 3 can be smoothly circulated without causing relative slippage between the upper sheave 21 and the rope 3.

A take-up device (not shown) for applying a required tension to the rope 3 is provided at an appropriate position of the rope 3, and the rope 3 stretched between the sheaves 21 and 22 is provided with a take-up device. 2
Adjust so that it does not deviate from 1 and 22.

Further, this removing device 2 can
A plurality of processing tanks 1 can be installed in parallel in the width direction of the circulation channel.

Next, the operation of the above-described apparatus for removing fibrous hardly decomposable substances contained in sewage will be described. A part of the cable 3 is immersed in the wastewater by stretching the cable 3 between the sheaves 21 and 22 installed in the processing tank 1 where the sewage circulates and the sheaves 21 and 22 installed in the processing tank 1, respectively. A fibrous non-degradable substance contained in sewage circulating in the treatment tank 1 is hooked on the cord 3 in the shape 3a. When the fibrous hard-to-decompose substance is caught on the spiral portion 3a of the cable 3, the shaft of the upper sheave 21 is intermittently or continuously rotated by a drive source such as a motor, thereby rotating the cable 3 Is circulated to prevent the fibrous hard-to-degrade material caught on the cable 3 from being detached by the spiral portion 3a of the wire 3 while the fibrous hard-to-degrade material caught on the wire 3 Above the water surface. Then, at a position near the trapping substance removing unit 4, the heating device 23 or the stretching roller 24 as a shape deforming unit of the rope 3 removes the helical 3 a rope 3 in which the fibrous hardly decomposable substance is easily trapped. Deforms into a straight line 3b. In this state, the trapping substance removing means 4
By injecting the washing water from the washing nozzle 41 as a member, the fibrous hardly decomposable substance caught on the cable 3 is removed by the water pressure of the washing water, and is accommodated in the garbage container 42 to thereby remove the cable. The fibrous hard-to-decompose substances trapped in 3 are removed. And the rope 3 from which the fibrous indegradable substance has been removed
Is further circulated, and when the rope 3 is immersed in the sewage, the linear 3b rope 3 is
It returns to a helical shape, and in the same manner, a fibrous hardly decomposable substance is captured.

In this embodiment, the fibrous hard-to-decompose material is trapped and removed in the treatment tank 1, but the fibrous hard-to-decompose material of the present invention is removed separately from the treatment tank 1. It is also possible to provide a water tank in which the apparatus is installed, remove the fibrous hardly decomposable substances in the wastewater, and then introduce the wastewater into the treatment tank 1.

[0025]

According to the apparatus for removing fibrous hardly decomposable substances contained in sewage of the present invention, an endless cable is provided between a sheave provided in the water tank and a position above the water tank in which the sewage circulates. Part of the cable is immersed in the sewage by stretching it, and the fibrous hardly degradable substance contained in the sewage circulating in the water tank is hooked on the cable, and the cable is intermittently or By continuously circulating drive, the fibrous hard-to-degrade substance caught on the rope is pulled up on the water surface, and at this position, the fibrous hard-to-degrade substance trapped in the rope by the trapping substance removing means is removed can do. In particular, a circulatingly driven endless cord that captures fibrous hard-to-degrade substances is made of a shape memory alloy, and in the vicinity of the trapped substance removing means, the fibrous hard-to-degrade property is obtained by means of the wire shape deforming means. Since the rope with a shape that allows the substance to be easily trapped is formed in a straight line, the fibrous hard-to-degrade substance is kept on the water surface while preventing the fibrous hard-to-degrade substance caught on the rope from coming off. In addition to being able to be pulled up, the fibrous hardly decomposable substance trapped in the cord by the trapping substance removing means can be easily removed. This prevents erroneous operation of the sensor due to entanglement of the fibrous hard-to-decompose substance and a decrease in the processing capacity of the pump, etc., thereby enabling stable sewage treatment and an extremely fine screen on the screen of the dust removing means. As in the case of using, a large amount of decomposable substances such as human dung and kitchen garbage are captured by the dust removing means, and the captured residue does not rot inside the dust removing means. It can be processed hygienically and easily,
The fibrous hardly decomposable substance removed from the sewage can be easily treated.

[0026] Further, by configuring the rope to be spiral in sewage, the rope can be easily deformed from a spiral to a straight line by means of the rope shape deforming means (from a straight line). The same applies to the case of spiral deformation)
When the fibrous hardly decomposable substance caught on the cable is pulled up on the water surface, the fibrous hardly decomposable substance can be reliably prevented from detaching.

Further, by forming the trapped substance removing means with a washing nozzle for jetting the washing water, the trapped fibrous hardly decomposable substance can be easily removed by the washing water jetted from the washing nozzle. .

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of an apparatus for removing fibrous hardly decomposable substances in sewage treatment of the present invention.

FIG. 2 is an explanatory view of an embodiment in which a pressing roller is provided on an upper sheave.

FIG. 3 is an external explanatory view showing an example of a wastewater treatment facility of a small-scale wastewater treatment plant to which the apparatus for removing fibrous hardly decomposable substances contained in wastewater of the present invention is applied.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 treatment tank (water tank) 2 apparatus for removing fibrous hard-to-decompose substances 21 upper sheave 22 lower sheave 23 heating device (cord strip shape deforming means) 24 stretching roller (cord strip shape deforming means) 25 presser roller 3 cord Article 3a spiral (part) 3b linear (part) 4 trapping substance removing means 41 washing nozzle 42 garbage receiver

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tetsuo Yamagata 3-11-1, Shimosakabe, Amagasaki City, Hyogo Prefecture

Claims (3)

[Claims] 1. An endless cable made of a shape memory alloy, which is stretched between a sheave installed in a water tank and a sheave installed in the water tank and circulates sewage, and installed above the water tank. Disposed at a position below the sheave, and a trapping substance removing means for removing the fibrous hard-to-decompose substance trapped in the rope at a position on the water surface by circulating drive,
In the vicinity of the trapping substance removing means, the sewage water is characterized by comprising a rope shape deforming means for making a fibrous hard-to-degrade substance easily trapped in a linear shape. For removing hard-to-decompose fibrous substances. 2. The apparatus for removing fibrous hard-to-degrade substances contained in sewage according to claim 1, wherein the cable is formed in a spiral form in the sewage. 3. The apparatus for removing fibrous hardly decomposable substances in sewage treatment according to claim 1, wherein the trapped substance removing means comprises a washing nozzle for jetting washing water.