JPH0717301U - Settling tank - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a settling tank capable of filtering the contaminated water flowing into the tank with a sludge receiving bag and easily removing the precipitate deposited in the tank. [Structure] In a precipitation tank in which polluted water is separated into a precipitation tank A and a supernatant layer B inside the tank 2 to deposit a precipitate in the tank 2 and to let the supernatant liquid flow out of the tank 2. A sludge receiving bag 12 arranged at the inflow portion of the polluted water, and a bag receiving body 13 that is located in the tank 2 and supports the sludge receiving bag 12 are further provided. An opening / closing means is provided for forming the outlet and opening / closing the outlet,
The inner bottom part 3 is formed by inclining downward toward the discharge port.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a settling tank installed in, for example, industrial wastewater, domestic wastewater, and other sewage treatment facilities.

[0002]

[Prior art]

 For example, in a sewage treatment system, the settling tank does not perform the primary treatment for the purpose of removing fine suspended solids and the secondary treatment for the purpose of removing colloidal solids and soluble organic substances. When treated by a physical and chemical treatment method, it is installed in a sewage treatment facility that actually treats it, and it is generally in the shape of a rectangular parallelepiped, and the polluted water after the treatment is in the running water channel. After passing, when it flows into the tank and accumulates, impurities in the polluted water, especially colloidal or soluble organic substances, are precipitated in the tank, and the supernatant liquid separated from the precipitated precipitate is taken into the tank. It is what is leaked to the outside.

[0003]

[Problems to be solved by the device]

 However, the above conventional settling tank has the following disadvantages. In other words, when the deposits that have settled in the tank accumulate over time, it becomes necessary to remove such precipitates from the tank. The treatment method was not taken into consideration, and therefore, in order to remove the precipitate from the tank, an operator entered the tank and scraped it off with a scoop. As a result, the efficiency of sewage treatment declined, and more manpower was required, resulting in higher costs.

The present invention can solve the above-mentioned inconveniences, and an object of the present invention is to filter the polluted water flowing into the tank with a sludge receiving bag and to easily remove the precipitate deposited in the tank. It is to provide a settling tank that can be removed.

[0005]

Means for Solving the Problems Among the settling tanks of the present invention, the one set forth in claim 1 separates polluted water into a settling layer and a supernatant layer inside the tank, and deposits the precipitate in the tank. In a settling tank that is designed to deposit and to let the supernatant flow out of the tank, a bag for sludge that is placed at the inflow part of polluted water, and a bag receiver that is located in the tank and supports the bag for sludge It is characterized by having a body.

Further, in a second aspect of the present invention, in the first aspect of the present invention, a discharge port for deposits deposited in the tank is formed in the lower portion of the tank and the discharge port is provided. An opening / closing means for opening and closing is provided, and the inner bottom portion of the tank is formed so as to be inclined downward toward the discharge port.

[0007]

[Action]

 According to the settling tank of the present invention according to claim 1, a sludge receiving bag disposed at an inflow portion of polluted water and a bag receiving member which is located in the tank and supports the sludge receiving bag. With the body, the contaminated water that flows into the tank will temporarily accumulate in the tank after passing through the sludge receiving bag. As a result, the impurities contained in the contaminated water are received by the sludge receiving bag when passing through the sludge receiving bag, and the polluted water after the impurities are removed is accumulated in the tank. Therefore, it becomes possible to remove impurities before the polluted water flows into the tank. When the amount of impurities received by the sludge receiving bag reaches a certain amount, the sludge receiving bag is removed and a new sludge receiving bag is attached again. At this time, since the sludge receiving bag is supported by the bag receiving body, the sludge receiving bag does not move freely in the tank, and when the sludge receiving bag is replaced, the work can be easily performed. It is possible to do.

According to the second aspect, when the polluted water flows into the tank with the discharge port formed in the tank closed by the opening / closing means, the polluted water accumulates in the tank over time. Go. The contaminated water accumulated in the tank is a supernatant consisting of a sediment layer in which the fine particles such as sand and viscosity contained in the sediment precipitate at the bottom of the tank, and the supernatant liquid above this sediment layer. Separated into layers, the precipitate gradually accumulates in the tank, and the supernatant liquid flows out of the tank. When the amount of the sediment that has settled in the tank reaches a certain amount, the discharge port is opened by the opening / closing means, and the sediment is stored in the tank inclined downward toward the discharge port due to the action of water pressure and gravity. It is discharged from the discharge port to the outside of the tank along the bottom. Therefore, it is possible to easily remove the precipitates from the tank in a short time by a simple work such as opening the discharge port with the opening / closing means, and it is possible to improve the treatment efficiency of polluted water and reduce its cost. Becomes

[0009]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 3 show an embodiment of a precipitation tank according to the present invention. A front surface of the precipitation tank 1 is shown in FIG. 1, a front section is shown in FIG. 2 and a side section is shown in FIG. The tank main body 2 of the settling tank 1 is a box-shaped body having a bottom portion 3 and walls surrounding the four sides and having an upward opening. A partition wall 7 is provided inside the tank main body 2 and the tank main body 2 is provided. The interior of 2 is divided into a first chamber 2a and a second chamber 2b. Further, in the lower portion of the front wall 4 in FIG. 1, two rectangular outlets 4a are formed corresponding to the first and second chambers 2a and 2b, and a rubber packing or the like (not shown) is formed on the periphery thereof. A sealing element is provided. An opening / closing door 8 is fitted in the discharge port 4a as a part of the wall body 4 in the same plane, and the opening / closing door 8 and a chain to be described later constitute an opening / closing means.

The opening / closing door 8 has an upper edge pivotally supported by the wall body 4 and can be opened and closed in the vertical direction, and a ring protruding outward is provided on the lower edge side. Further, one end of a chain 9 is fixed to the wall body 4 above the opening / closing door 8, and a hook provided on the other end of the chain 9 engages with a ring provided on the opening / closing door 8. ing. Then, when the open / close door 8 is open (see FIGS. 1 and 3), the ring and the hook are engaged, and the lower end side of the open / close door 8 is supported by the chain 9, while in the closed state, a bolt (not shown) is attached. Therefore, it is fixed to the wall body 4. 1 and 2, an outlet 5a for discharging the supernatant liquid accumulated in the tank body 2 to the outside is provided in the upper part of the left wall portion 5 and the bottom portion 3 is shown in FIG. As shown in detail in FIG. 3, the wall body 4 has a structure inclined downward toward the discharge port 4a.

A tube body such as a hose 11 for inflowing polluted water toward the tank body 2 is disposed above the tank body 2 and the tip of the hose 11, that is, the hose 11 is polluted. In the present embodiment, for example, a sludge receiving bag 12 in which artificial fibers are formed into a porous bag shape is attached to the muddy water discharge port. The sludge receiving bag 12 is attached by wrapping the tip of the hose 11 at its opening and tightening the wrapped portion with a band 15 or the like from the outside. Therefore, the contaminated water flowing through the hose 11 into the tank is once passed through the sludge receiving bag 12 and then passes through the perforation to be drained into the tank body 2.

The sludge receiving bag 12 is supported by a bag receiving body 13 attached to the right side wall body 6 in FIGS. 1 and 2. The bag receiving body 13 is formed by forming a plurality of braids in a mesh shape and then forming the braided braids in a rectangular parallelepiped shape that opens upward, and has two ridge lines orthogonal to the opening surface. The mounting bracket 13a provided is engaged with the upper edge portion of the wall body 6, whereby the bag receiving body 13 is mounted while being positioned inside the tank body 2. The bag receiving body 13 may be configured such that only the bottom surface or the surface facing the first chamber 2a is made of the mesh-like stiffener, and the other is made of an ordinary flat plate, or is formed as a column or as a whole. It may be formed in a semi-cylindrical shape or the like, or may have an openable / closable lid or the like on the upper surface.

Next, the operation of the settling tank 1 having the above structure will be described. First, the settling tank 1 is set in a state in which the opening / closing door 8 is closed and the opening / closing door 8 is fixed to the wall body 4 by bolts, and the polluted water flowing through the hose 11 is allowed to flow into the tank body 2. At this time, the polluted water contains impurities such as sand, fine particles such as viscosity, and other suspended matters, and among these impurities, those that are relatively coarse pass through the sludge receiving bag 12. At this point, the contaminated water, which has been received by the sludge receiving bag 12 and has removed the coarse impurities, passes through the perforations of the sludge receiving bag 12 and accumulates in the first chamber 2a of the tank body 2 over time. .

The polluted water filled in the first chamber 2a flows over the partition wall 7 into the second chamber 2b, and accumulates with the passage of time. The polluted water accumulated in the first and second chambers 2a and 2b is a sediment layer A in which fine particles such as sand and viscosity contained therein are deposited in the lower part of the tank, and the sediment layer. The supernatant is separated into a supernatant layer B consisting of a supernatant liquid, and the precipitate is gradually deposited in the first and second chambers 2a and 2b, while the supernatant liquid is discharged from the outlet port 5a to the tank body. It leaks to the outside of 2.

After that, when a certain amount of the sediment that has settled in the tank body 2 is accumulated, the bolt is removed and the opening / closing door 8 is opened to engage the ring of the opening / closing door 8 with the hook of the chain 9. The chain 9 supports the opening / closing door 8. Due to the opening of the opening / closing door 8, the sediment that has settled in the tank body 2 tends to flow downward along the inclination of the bottom portion 3 due to the action of the water pressure and gravity of the polluted water, so that the sediment is not formed. That is, it is discharged from the discharge port 4a of the tank body 2 to the outside, and the discharged precipitate may be stored in, for example, a saucer outside the tank body 2 and discarded.

On the other hand, when a certain amount of impurities received in the sludge receiving bag 12 is accumulated, the band 15 that fastens the sludge receiving bag 12 and the hose 11 is removed, and the sludge receiving bag 12 is removed. , Reinstall a new sludge bag. At this time, since the sludge receiving bag 12 is supported by the bag receiving body 13, all the weight of the sludge receiving bag 12 containing impurities is applied to the bag receiving body 13, and the sludge receiving bag 12 is stored in the tank body 2. Since it is located at the open end, the replacement work of the sludge receiving bag 12 can be easily performed without any special effort.

As described above, the impurities contained in the contaminated water are received by the sludge receiving bag 12 when the contaminated water flows into the tank, and the fine particles that have passed through the pores of the sludge receiving bag 12 are contained. Since the substance settles in the first and second chambers 2a and 2b of the tank body 2 and is taken out from the discharge port 4a, it is possible to easily remove this impurity in a short time and improve the treatment efficiency of polluted water. , Its cost can be reduced.

In this embodiment, the sludge receiving bag 12 is attached to the tip of the hose 11 with the band 15. However, the present invention is not limited to this example, and the sludge receiving bag 12 may be a cloth-like bag. The inner surface of the bag receiving body 13 may be covered so that the contaminated water may flow toward the inside of the bag receiving body 13. In this case, if a certain amount of impurities are accumulated, the end of the cloth-like sludge receiving bag is When the bag is replaced by grasping it, the same effect as the bag-shaped sludge receiving bag 12 can be obtained.

[0019]

[Effect of device]

 As is clear from the above description, according to the settling tank of the present invention, the following effects can be obtained. According to the first aspect, the tank is provided with the sludge receiving bag arranged at the inflow portion of the polluted water, and the bag receiving body that is located inside the tank and supports the sludge receiving bag. The polluted water that flows into the tank will temporarily accumulate in the tank after passing through the sludge receiving bag.Therefore, before the polluted water flows into the tank, impurities contained in the polluted water will be removed. It can be removed to improve the treatment efficiency of polluted water and reduce its cost. Moreover, since the sludge receiving bag is supported by the bag receiving body, the sludge receiving bag does not move in the tank without permission, and the sludge receiving bag can be easily replaced.

According to the second aspect of the present invention, the deposit accumulated in the tank can be removed from the tank by a simple operation such as opening the discharge port by the opening / closing means, and the treatment efficiency of the polluted water can be improved. It can be improved and its cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of a settling tank according to the present invention.

FIG. 2 is a front sectional view of FIG.

FIG. 3 is a side sectional view of FIG.

[Explanation of symbols]

 1 settling tank 2 tank body 3 bottom of tank 4a discharge port 8 opening / closing door (opening / closing means) 9 chain (opening / closing means) 11 hose 12 sludge receiving bag 13 bag receiving body A sedimentation layer B supernatant layer

Claims (2)

[Scope of utility model registration request] 1. A polluted water in a settling tank, wherein polluted water is separated into a settling layer and a supernatant layer inside the tank, the precipitate is deposited in the tank, and the supernatant is allowed to flow out of the tank. A sedimentation tank, comprising: a sludge receiving bag disposed at an inflow portion of the container, and a bag receiving body located in the tank and supporting the sludge receiving bag. 2. A discharge port for deposits deposited in the tank is provided in the lower part of the tank, and an opening / closing means for opening / closing the discharge port is provided, and an inner bottom portion of the tank is connected to the discharge port. The precipitation tank according to claim 1, wherein the precipitation tank is formed so as to be inclined downward.