JP2565654Y2 - Septic tank - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention comprises a sedimentation tank for sedimenting sludge in treated water from the upstream side, a disinfection tank for disinfecting the supernatant from the sedimentation tank, and a right and left passage from the sedimentation tank to the disinfection tank. The present invention relates to a septic tank in which a medicine tube for dissolving a solid disinfectant in treated water is provided upright at a junction of an overflow channel.

[0002]

2. Description of the Related Art In a conventional septic tank, the merging portion of an overflow channel in which a medicine tube is vertically arranged is the same depth as the upstream and downstream sides of the merging portion in the overflow channel. However, since the flow rate of the treated water flowing into the septic tank fluctuates, in such a configuration, for example, when the flow rate of the treated water is reduced,
Since the depth of the treated water flowing through the overflow channel becomes shallower as a whole, the solid disinfectant contained in the medicine cylinder installed upright at the junction of the overflow channel can maintain a sufficient contact area with the treated water. May disappear. As a result, the amount of disinfectant dissolved may be insufficient, and the concentration of the disinfectant in the treated water to be discharged may not reach the predetermined disinfectant concentration. Further, for example, the temperature of the treated water changes depending on the season, and the disinfectant dissolution rate decreases in winter, so that the disinfectant dissolved in the treated water may not reach a predetermined concentration.

[0003]

Therefore, an object of the present invention is to set the concentration of the disinfectant of the treated water to be discharged constantly even if the inflow of the treated water is reduced or the temperature is lowered. It is an object of the present invention to provide a septic tank capable of reaching a predetermined concentration.

[0004]

In order to achieve the above object, the present invention has the following features: a septic tank for sedimenting sludge in treated water from an upstream side; and a disinfectant for disinfecting a supernatant from the sedimentation tank. the vessel is provided, at the confluence of the right and left overflow path to the disinfecting bath from the precipitation tank, together with the upright position the chemical cartridge for dissolving the solid disinfectant in the treated water, the merging section, the overflow A stagnant portion that can stagnate treated water is formed deeper than the upstream and downstream sides of the junction in the flow path.

[0005]

The merging portion where the medicine cylinder is erected is formed deeper than the upstream and downstream sides of the merging portion in the overflow channel so that the merging portion has the same depth as the upstream side and the downstream side. Thus, the state in which the medicine cylinder is immersed deeper in the treatment liquid can be always maintained as compared with the conventional configuration. In addition, since the retention section is provided,
The chemical cylinder is determined by the flow depth of the processing liquid in the overflow channel.
Also keeps the state immersed deeply in the processing solution,
A sufficient contact time with the treatment liquid can be secured, and the treatment liquid
Even if the flow rate is reduced, the processing liquid remains
So that it once stays in the part and makes contact with the medicine cylinder
And can be contacted for a sufficient time,
The dissolution of the drug can be sufficiently ensured. Its <br/> result, there is a variation in the inflow of process water, even this had to be reduced, dissolved thereto always sufficiently contact with the treatment water disinfectant solid contained in the chemical cartridge Can be done.

[0006]

[Effect of the invention] In other words, the junction is formed deep and the treated water
The dissolution efficiency of the solid disinfectant can be improved by a simple improvement in which a retaining portion capable of retaining is formed and the medicine cylinder is erected there. As a result, for example, even if the inflow of the treated water is reduced or the temperature is lowered, a septic tank can be provided so that the concentration of the disinfectant of the treated water to be discharged always reaches a predetermined concentration. We were able to.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a septic tank according to the present invention. As shown in FIG. 1, this septic tank is
A sedimentation tank 1 for sedimentation and separation of the sludge in the treated water flowing from the bottom of the upstream contact aeration tank E, a disinfecting tank 2 for disinfecting the supernatant liquid transferred from the sedimentation tank 1, and the treated water from the disinfecting tank 2 once. A discharge water storage tank 3 for receiving and retaining the mixed water and discharging after mixing, and a discharge pump 5 for discharging the treated water in the discharge water storage tank 3 through a discharge pipe 4 are provided. As shown in FIGS. 1 to 4, the depth of the junction of the right and left overflow channel 6 from the sedimentation tank 1 to the disinfection tank 2 is deeper than the upstream and downstream sides of the junction 6 in the overflow channel 6. Formed and formed in the stagnation area of the treated water
is there. Further , a medicine tube 8 is provided upright near the center of the junction. The width of the junction is formed wider than the diameter of the medicine tube 8. The medicine tube 8 contains a solid disinfectant, and a plurality of lengthwise dispensers for the treated water to enter and exit over the entire circumference near the bottom of the medicine tube 8 so that the disinfectant comes into contact with the treated water and dissolves. A hole is formed. The supernatant of the sedimentation tank 2 flows into the overflow channel 6 from a plurality of V-notches formed in the right and left overflow weirs 9, and contacts the disinfectant in the medicine tube 8 at the junction to dissolve the disinfectant. While flowing into the disinfection tank 2. The disinfecting tank 2 is provided with a partition wall 10 while securing a flow path at the bottom so that the dissolved disinfectant mixes well with the treated water. 10, the water overflows from the overflow port 11 to the discharge water storage tank 3. As shown in FIG. 1, the discharge water storage tank 3 uses a float 12 to automatically manage the water level. When the water level rises to the upper limit water level HWL, the discharge pump 5 is operated, and the water is discharged through the discharge pipe 4. When the water is discharged and the water level falls to the lower limit water level LWL, the discharge pump is stopped. The capacity of the discharge pump 5 is made larger than the inflow of the treated water into the septic tank, and a part of the treated water pumped up by the discharge pump is returned to the discharge tank via the circulation path 14, and the treated water in the discharged water tank is discharged. The disinfectant concentration of the treated water is sufficiently mixed so as to minimize temporal and spatial variations in the disinfectant concentration. The upper limit water level HWL is set lower than the overflow port 11, and the overflow port 11 is provided at a level lower than the outlet of the overflow channel 6. In the figure, reference numeral 15 denotes a flow rate adjusting valve for adjusting the apparent pump capacity of the discharge pump 5 by adjusting the flow rate of the circulating water. As the solid disinfectant, for example, an isocyanuric acid organic chlorine agent having a high effective chlorine content can be used. This disinfectant
Compared to calcium hypochlorite, which is widely used, it does not easily swell when immersed in treated water, so even if the lower part of the drug contained in the drug cylinder dissolves in the treated water, the upper drug swells. It is excellent in that it does not cause a so-called bridging phenomenon that does not fall into the tank. There was a possibility that the concentration did not reach the predetermined concentration.
However, according to the above configuration, while the bridging phenomenon can be eliminated by using the solid disinfectant, for example, even if there is a change in the inflow amount of the treated water into the septic tank, the disinfectant of the treated water The concentration can always reach a predetermined concentration.

[0008] In the claims of the utility model registration, reference numerals are written for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a main part of a septic tank in an embodiment.

FIG. 2 is a perspective view of the vicinity of an overflow channel.

FIG. 3 is a cross-sectional view of the vicinity of the junction of the overflow channel.

FIG. 4 is a vertical cross-sectional view of the vicinity of the junction of the overflow channel.

[Explanation of symbols]

 Reference Signs List 1 sedimentation tank 2 disinfection tank 6 overflow channel 8 drug cylinder

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical indication location C02F 1/50 550 C02F 1/50 550B 560 560H 1/76 1/76 A (72) Inventor Kitai Good person 2 in Takamatsu, Kosai-cho, Koga-cho, Shiga Prefecture Inside the Kubota Shiga Plant (72) Inventor Kazuyuki Honda 2 in Takamatsu, Kosai-cho, Koga-gun, Shiga Prefecture Inside Kubota Shiga Plant (56) Reference Literature Japanese Utility Model Hei 3-75893 (JP, U) Japanese Utility Model Showa 51-9560 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A sedimentation tank (1) for sedimenting sludge in treated water from an upstream side, and a disinfection tank (2) for disinfecting a supernatant liquid from the sedimentation tank (1). A purifying tank in which a medicine tube (8) for dissolving a solid disinfectant in treated water is provided upright at a junction of a right and left overflow channel (6) to the disinfection tank (2), in the overflow channel deeper than the upstream side and downstream side of the merging portion of the (6), the residence possible accumulation of treated water
Septic tank with a part formed.