JPH04118199A - Dust removing and dehydrating device - Google Patents

Abstract

PURPOSE:To bag and take out only the extraneous matter in sewage by providing a cylindrical screen and duct in a plunger type pressure dehydrating means in the lower part of a water receiving tank of the dust removing and dehydrating device. CONSTITUTION:The dust removing and dehydrating device is constituted of the water receiving tank 1 which supplies the sewage, the pressure dehydrating means which is provided on a drain pipe 3 provided in the lower part thereof, a cylindrical screen 7 which is disposed to face this means, and a duct 8 which is connected thereto and is provided with a back pressure. A bag 10 is freely attachably and detachably provided at the front end of the duct 8. The extraneous matter in the sewage separated by the screen on the downstream in the sewage is washed and dehydrated by the forward and backward operations of the plunger of the pressure dehydrating means and the undissolved materials, such as human excretas, are crushed and washed and are discharged together with the sewage. Only the extraneous matter is thus bagged and taken out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dust removal and dewatering device suitable for small-scale sewage treatment.

[Conventional technology]

Generally, in large-scale sewage treatment plants, a large number of impurities are mixed in the sewage that flows through the sewer system. For this reason, after the wastewater is passed through a dust remover to remove impurities, the wastewater is aerated in the next step.

However, small-scale sewage treatment plants cannot install dust removers, and wastewater is treated directly.

[Problem to be solved by the invention]

Undissolved human feces and other impurities are mixed into the wastewater, and treatment in this state takes time and generates a large amount of untreated impurities. In addition, undissolved human excrement is mixed into dust removers that capture impurities with a screen and scrape them up with a rake, making it impossible to directly landfill or dump the scraped waste. ing.

When treating wastewater, the present invention aims to remove impurities and dehydrate the wastewater in advance, as well as destroy undissolved human excrement and the like that may be mixed in, wash the wastewater, and treat it.

[Means to solve the problem]

The present invention has been made to achieve the above object, and includes a water receiving tank for supplying waste water, a pressurized dewatering means provided on a drain pipe provided at the bottom of the water receiving tank, and a pressurized dewatering means provided on the drain pipe and the pressurized water receiving tank. a cylindrical screen disposed opposite the pressure dewatering means;
The main feature is that the device is connected to the screen and includes a duct equipped with a back pressure device, and a bag is detachably provided at the tip of the duct.

[For production]

The sewage that has flowed into the water receiving tank is guided to a pressurized dewatering means equipped with a screen located at the bottom of this water receiving tank, whereby the sewage passes through the screen and is drained from the outlet and supplied to the next sewage treatment tank. The impurities captured by the screen are pressurized and dehydrated by advancing the plunger of the pressurized dewatering means.

At this time, the plunger also reaches the set stroke 2.
Undissolved human excrement, etc. is destroyed by moving it back and forth three times.
Only the uncrushed contaminants are washed with wastewater that flows out through the screen.The uncrushed contaminants are pressurized and transferred through a duct connected to this screen, and stored in a bag placed at the tip of the duct, where the dehydrated contaminants are collected. Make discharge easier.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The dust removal and dehydration apparatus of the present invention will be explained below based on the illustrated embodiments.

1 to 6 show the first embodiment.
is a water tank having a required capacity; an inlet 2 is connected to this water tank 1 to supply wastewater into the tank 1, and a discharge pipe 3 is provided at the bottom of the tank. This water receiving tank 1 may be provided with an overflow roller to maintain the water level in the tank at a set level.

The discharge pipe 3 is disposed in a substantially vertical direction, and a cylinder 5 is integrally provided so as to intersect with the discharge pipe 3 in a horizontal direction, and a plunger 6 is slidably inserted into the cylinder 5 to constitute a pressurized dewatering means. At the same time, a cylindrical screen 7 is provided on the side of the discharge pipe 3, facing the cylinder 5. Therefore, the sewage supplied to the water receiving tank 1 passes through the discharge pipe 3 from inside the tank, and the sewage that is filtered from the screen 7 flows into the lower part of the outer tank 13 containing the secondary water receiving tank 1, pressurized dewatering means, screen 7, etc. The wastewater is drained out of the apparatus through the provided outlet 4, and when this wastewater passes through the screen 7, impurities in the wastewater are removed.

The foreign matter captured by this screen 7 is transferred to the plunger 6
Pressurized dehydration is carried out by the advancement of the The plunger 6 locks one end of a link 12 pivotably connected to a cylinder (hydraulic, pneumatic, electric, etc.) 11, and locks the other end of this link 12 to the plunger 6, so that the plunger 6 is inserted into the cylinder 5. The protrusion and retraction stroke of the plunger 6 is predetermined by the stroke of the cylinder 11 and the link 12. It penetrates in the direction and reaches inside the cylindrical screen. As the plunger 6 moves forward, the foreign matter trapped on the inner peripheral surface of the cylindrical screen 7 is pressurized. At this time, the plunger 6 protrudes from inside the cylinder 5 into the discharge pipe, and the discharge pipe is closed by the forwardly protruding plunger 6, stopping the outflow of sewage and pressurizing the foreign matter. is dehydrated and discharged to the outer tank 13 through a screen, and the impurities that have been dehydrated under pressure are passed through a duct 8 connected to the screen 7.
being pushed inward. Since this duct 8 is provided with a back pressure device 9, the foreign matter pushed into the duct by the plunger is pressurized within the duct and dehydrated.

The height of this back pressure device is set higher than the water level of the water receiving tank to prevent water from affecting the screen residue after dewatering.

Furthermore, if there is undissolved human excrement or the like among the foreign substances, it will be crushed when the plunger is pressurized, and the wastewater that flows out will naturally wash the wastewater and discharge it together with the wastewater. Also, the end face of the screen scum that has been pushed in is constantly being eroded by running water, and each time it is pressed with the plunger, it is washed and the screen scum is washed. By repeating this operation, the wastewater supplied to the water receiving tank is drained after removing impurities with a screen, and the captured impurities are dehydrated under pressure, transferred inside the duct, and sent to the tip of the duct. It is stored in a provided bag.

When the bag is full, it is replaced with a new one, and the bag filled with foreign matter after dehydration can be directly incinerated or disposed of in a landfill.

Figures 7 to 9 show a second embodiment with a different screen part, in which a cylindrical screen 7 is extended to the lower end of the discharge pipe 3, thereby improving the concentration efficiency of wastewater. The other configurations are the same as in the first embodiment.

FIG. 10 shows a third embodiment in which a link 14 is interposed between the plunger 6 and the link 12 so that the plunger 6 can be smoothly moved in and out by driving the cylinder 11.

The fourth embodiment shown in FIGS. 11 and 12 uses a pinch valve 15 as the back pressure device in the first embodiment.

〔Effect of the invention〕

According to the present invention, the plunger-type pressurized dewatering means provided at the bottom of the water receiving tank is equipped with a cylindrical screen, and a duct is connected to this screen, so that the contaminants in the wastewater separated by the screen as it flows downstream are removed. Materials can be washed and dehydrated by the reciprocating motion of the plunger, and substances such as undissolved human excrement are crushed and washed and flowed out together with the sewage, and only impurities are taken out in bags, making it suitable for small-scale sewage treatment. It's something.

[Brief explanation of drawings]

The drawings show an embodiment of the dust removal and dehydration device of the present invention, and FIGS. 1 to 6 show the first embodiment. FIG. 1 is a longitudinal sectional front view of the whole, and FIG. Figure 3 is its side view, Figure 4
The figure is a cross-sectional view of the pressurized dehydration means, and Figure 5 is V-V in Figure 4.
6 is a sectional view taken along the TV-TV line in FIG. 4, FIGS. 7 to 9 are a second embodiment with different pressurized dehydration means, and FIG. 7 is a longitudinal section of the main part. Front view, Figure 8 is the 7th
A cross-sectional view taken along the line ■-■ in the figure, Figure 9 is tx-t in Figure 7.
10 is a longitudinal sectional view of the third embodiment, FIGS. 11 and 12 are the fourth embodiment, FIG. It is an explanatory diagram. 1 is a water tank, 2 is an inlet, 3 is a water pipe, 4 is an outlet, 5
is a cylinder, 6 is a plunger, 7 is a cylindrical screen,
8 is a duct, 9 is a back pressure device, 10 is a bag, 11 is a cylinder, and 12 is a link. Patent applicant Hitachi Kiden Kogyo Co., Ltd. Figure 1 Figure 12 Figure 4 Figure 7 Figure 10 Figure 11

Claims (1)

[Claims] (1) A water tank that supplies sewage, a pressurized dewatering means installed in a drain pipe provided at the bottom of this water tank, and a drain pipe provided with
It also consists of a cylindrical screen disposed facing the pressurized dewatering means, and a duct connected to this screen and equipped with a back pressure device, and a bag is detachably provided at the tip of the duct to drain the waste water. A dust removal and dehydration device is characterized in that it removes impurities, etc. and performs the entire process up to dehydration and bagging.