JPS6213078B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an evapotranspiration treatment device for evaporating wastewater sent from a septic tank, and includes an evaporation treatment tank 1 in which inflowing sewage accumulates, an intake port 2 and an exhaust port provided in the evaporation treatment tank 1. 3, a filter 4 provided in the evaporation treatment tank 1, a water supply device 5 that supplies dirty water at the bottom of the evaporation treatment tank 1 to the filter 4, and an air supply fan that sucks air from the intake port 2 and sends air to the filter 4. 6, a plurality of parallel filters 4 are arranged diagonally across the evaporation treatment tank 1,
An evapotranspiration process characterized by arranging the water sprinkler 32 of the water supply device 5 above between the plurality of filters 4 and making the air supply fan 6 face the filter 4 below the plurality of filters 4. It is related to the device.

Conventionally, as a means for natural evaporation of sewage, for example, as shown in FIG. Some substances evaporate and transpire into the atmosphere. Here 12 is the cleaning port,
GL is the ground. However, such conventional examples have various drawbacks as described below. First, it required a large area. In other words, the amount of natural evaporation from the ground surface is 0 to 5/m ² . It is said that it is about 2/m ² .day on average. Based on the amount of evaporation per day, if a family of five uses a conventional flush toilet and septic tank, the amount of water processed will be
250 (50 per person per day), the area will be ^125m2 . Even if a combination of a simple flush toilet and a dedicated septic tank is used, the amount of water to be treated will be 25 (5 per person, 5 per day), which requires 12.5 ^m2 . Secondly, there were many restrictions on where it could be installed. In other words, in the case of natural evapotranspiration, the optimal location is a sunny and well-ventilated location. Locations that are unsuitable for installation include locations with high groundwater levels,
There are many restrictions such as under slopes, depressions, near rice fields, poorly drained areas, and clay or sandy soils. Furthermore, measures against rainwater were needed. In other words, the average rainfall in Japan is approximately 1800mm, equivalent to 1800mm per day.
4.9/m ² days. During rainfall, not only does the evaporation function stop, but there is also a risk that the water may seep into the tank, so surface drainage measures such as embankments are necessary. Furthermore, maintenance and management was time-consuming and difficult. In other words, in the case of natural evapotranspiration, it is important to keep the soil on the evaporation surface soft, which requires digging up the soil and turning it over.

There is also a composting toilet that evaporates urine, as shown in Figure 2, although it is not an evapotranspiration device that evaporates wastewater sent from a septic tank. This is toilet bowl 33
The excrement that has fallen from the toilet is separated by a human waste separator 13, the urine is sent to an evaporation bed 14, and the waste is sent to a composting chamber 34, where it is heated and evaporated by a heating device 15. Here, 16 is an exhaust port, 17 is a curing room,
18 is an outlet. However, in such a conventional example, since the toilet bowl 33 is not a flush type, the usability is far inferior to that of a flush type. There is also a heating device 1 inside.
5, and has a structure in which the intake air is heated and then evaporated by supplying the air, so the amount of heat required for heating is required and the running cost is relatively high. Furthermore, the entire device including the evapotranspiration mechanism must be installed directly below the toilet room 19, making construction extremely difficult. In particular, the compost extraction side cannot be constructed if there is a building foundation, so there is no foundation. In other words, construction cannot be carried out unless the foundation in part A in Figure 2 is removed or there is no foundation.
Furthermore, since air passes through the surface of the evaporation bed 14 made of mulch, etc., the air-liquid contact area is small, resulting in low efficiency.

The present invention has been made in view of the above points, and the object of the present invention is to have high evaporation efficiency, do not require a large site area, and can be installed anywhere without being subject to restrictions on installation location. The purpose of the present invention is to provide an evaporation treatment device that does not require rain protection. The present invention will be explained in detail below with reference to Examples. Reference numeral 1 denotes an evaporation treatment tank, into which wastewater is sent from the septic tank through a wastewater inflow pipe 21. A lid 23 is detachably attached to an inspection opening 22 at the center of the top surface of the evaporation treatment tank 1. An intake pipe 25 is connected to an opening 24 on one side of the upper surface of the evaporation treatment tank 1 with a connector 26 such as a bolt and nut to form an intake port 2. A rainwater cover 27 is installed above the intake pipe 25. is installed. An exhaust port 3 is formed by connecting an exhaust pipe 29 to the opening 28 on the other side of the upper surface of the evaporation treatment tank 1 . Inside the evaporation treatment tank 1, a plurality of filters 4 for gas-liquid contact are arranged diagonally across the inside of the tank, and a water sprinkler 32 is arranged above between the plurality of filters 4. There is. Evaporation treatment tank 1
A water pump 30 is disposed at the lower part of the interior, and the water supply device 5 is formed by connecting the water sprinkler 32 and the pump 30 with a water supply pump 31. An air supply fan 6 is disposed below the intake port 2 in the evaporation treatment tank 1. Here, HWL is the highest water level and LWL is the lowest water level. When the air fan 6 and the water pump 30 are driven, the unsaturated air taken in by the air fan 6 is blown onto the filter 4, while the dirty water sucked in by the water pump 30 is blown into the water pipe 31.
The water is sent to the water sprinkler 32 via the water sprinkler 32, and the filter 4 is sprinkled with water by the water sprinkler 32. Therefore, it evaporates through gas-liquid contact with the filter 4 and is discharged from the exhaust port 3 to the outside of the tank.

For example, the amount of air required for blowing is calculated as follows.

Using the Osaka region as an example, calculate the amount of air blown in January, when the conditions are the most severe.

Average temperature in January: 4.5℃ Average humidity: 68% (from the Science Chronology) The toilet used will be a simple flush toilet, and the total amount of sewage per person per day will be 3.6.

Q = (H ₂ - H ₁ ) x 1/v _H where Q: Amount of water evaporation per 1 m ³ (Kg/m ³ ) H ₂ : Absolute humidity at temperature t ₂ and humidity h ₂ (Kg/Kg) H ₁ : Temperature t ₁ , humidity h ₁ 〃 〃 Kg/Kg t ₁ = 4.5℃, h ₁ = 68% v _H : Specific volume at t ₁ , h ₁ (m ³ /Kg) t ₂ : Exhaust air temperature (h ₂ = 90% and t ₂ ≒ 3
℃) h ₂ : Exhaust air humidity (assuming = 90%) When calculating, Q = 9.76×10 ^-4 Kg−H ₂ O/m ³ −
air Therefore, the amount of air required to evaporate 3.6/day is (3.6/Q) x 1/24hr x 1/60min = 2.56m
³ /min As a result of the above calculation, even in January, when the conditions are the most severe, in a household of five people, if air is supplied at a rate of 2.56 x 5 = 128m ³ /min, the sewage from the flush toilet (human waste + washing water) can be completely reduced. = 3.6/day.person) can be evaporated.

In addition, in the case of a general human waste septic tank, the amount of sewage per person per day is 50, and the air flow rate is also required to be 178 m ³ /min, so the present invention is not suitable for general household use.

As described above, in the present invention, sewage is supplied to the filter in the evaporation treatment tank, and air is sent to the filter using an air fan to cause gas-liquid contact and evaporate the sewage, thereby improving evaporation efficiency. It does not require a large site area, and since air is sucked into the evaporation treatment tank through the intake port and evaporated wastewater is exhausted from the exhaust port, it can be installed anywhere without restrictions. Furthermore, since the water is evaporated in an evaporation treatment tank, it does not require rainwater countermeasures.Furthermore, it does not require any special maintenance and does not release water at all, so it provides the comfort of flushing in any area. It is possible to obtain this by arranging a plurality of parallel filters diagonally across the evaporation treatment tank.
The sprinkler of the water supply device is placed above the multiple filters, and the air supply fan is placed opposite the filter below the multiple filters, so that the waste water sprinkled from the sprinkler is distributed between the multiple filters. When the air flows down through the filters and flows down between the filters, air is blown from an air fan facing the lower filter and evaporated by hitting the filter. It can be applied effectively to promote gas-liquid contact and evaporate efficiently, and even if the air from the air fan is applied directly and strongly to the filter, it can prevent wastewater from scattering at the upper filter. This prevents water droplets of sewage from splashing out from the exhaust port.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of one conventional example, FIG. 2 is a sectional view of another conventional example, and FIG. 3 is a sectional view of an embodiment of the present invention, in which 1 is an evaporation treatment tank, 2 is an intake port. , 3 is an exhaust port, 4 is a filter, 5 is a water supply device, and 6 is an air supply fan.

Claims (1)

[Claims] 1. An evaporation treatment tank in which inflowing sewage accumulates, an intake port and an exhaust port provided in the evaporation treatment tank, a filter provided in the evaporation treatment tank, and a water supply device that supplies sewage at the bottom of the evaporation treatment tank to the filter; It consists of an air supply fan that takes in air from the intake port and sends air to the filter, and a plurality of parallel filters are arranged diagonally across the evaporation treatment tank, and a water supply device is installed above between the plurality of filters. 1. An evaporative transpiration treatment device, characterized in that a water sprinkler is disposed, and the air supply fan is opposed to a lower filter of a plurality of filters.