JPH07265849A - Sewage treating device - Google Patents

Abstract

PURPOSE:To continuously heat a large volume of sewage contg. night soil, etc., with extremely simple constitution and slight energy without using a pump for feeding/discharging the sewage and to sterilize this sewage to the extent of permitting utilization as a fertilizer as it is. CONSTITUTION:This sewage treating device for sterilizing the sewage contg. water-soluble pollutant, such as night soil, by heating consists of a sewage tank 2 for temporarily storing the sewage and a heat treating device 3 for sterilizing the sewage supplied from the inside of this sewage tank 2 by heating. This heat treating device 3 consists of a high-temp. chamber 5 for boiling the sewage and a heater 6 for heating the inside of the chamber 5 to the b. p. of the sewage or above. The heater 6 and the high-temp. chamber 5 are covered with heat insulating materials 7 to prevent leakage of their heat outside. A feed pipe 9 for feeding the sewage by the water pressure of the sewage in the sewage tank 2 is connected to the high-temp. chamber 5 so as to open at the base of the chamber or near the base. The high-temp. chamber 5 is provided with a siphon pipe 10 for discharge which discharge the sewage boiled in the chamber 5 outside by the steam pressure in the chamber 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment apparatus for heat-sterilizing sewage containing water-soluble pollutants such as manure.

[0002]

2. Description of the Related Art Recently, hygienic and simple flush toilets have become widespread even where sewerage facilities are not fully equipped. This type of flush toilet compresses manure and stores it in a tank etc. and collects it regularly with a vacuum car etc., but it is assumed that manure will be collected, so you can not put a vacuum car It cannot be installed in a mountain hut in a mountainous place. Therefore, in such a place, a so-called fertilizer moat that is a primitive moat is kept in the moat and left for a while. Alternatively, it is used by being manually extracted and used as fertilizer. In addition, when manure of humans or livestock is used as fertilizer, not only in such mountains, it is also temporarily stored in the fertilizer and used in the fields as needed.

[0003]

However, since manure contains many Escherichia coli and other pathogenic bacteria derived from the intestinal tracts of humans and animals, if it is used as it is as a fertilizer, it may contaminate the soil. However, there is a problem that the maggots are born and a large number of flies are generated, which is not hygienic. Similar to general sewage treatment, it is hygienic to disinfect manure with chlorine, which is a strong oxidant, but if this is spread over the fields, soil will be acidified by residual chlorine contained in the disinfected manure, It causes the problem that crops will not grow.

Heat disinfection is known as a method for sterilizing without using an oxidizing agent such as chlorine. When sewage containing feces and urine is subjected to heat treatment, it is supplied from the sewage tank into the heating tank. Each of the pump, the pump for discharging the heat-treated sewage, the heater in the heating tank, etc. consumes energy, so that not only the running cost increases, but also the plant becomes complicated and the equipment cost increases.
Therefore, the present invention has a very simple structure without using a pump for feeding / discharging sewage, and continuously heats a large amount of sewage containing manure with a small amount of energy, and directly uses it as a fertilizer. The technical issue is to be able to sterilize to the extent that it can be used.

[0005]

In order to solve this problem, the present invention is a sewage treatment apparatus for heat-sterilizing sewage containing water-soluble contaminants such as manure, which temporarily stores sewage. And a heat treatment device that heats and sterilizes the sewage fed from the sewage tank, wherein the heat treatment device heats the inside of the chamber to a high temperature chamber for boiling the sewage or above the boiling point of the sewage. The heater and the high temperature chamber are covered with a heat insulating material so as to prevent the heat from leaking to the outside, and a feed pipe for feeding the sewage by the water pressure of the sewage in the sewage tank. A drain siphon pipe is provided, which is connected to the bottom surface of the high temperature chamber or near the bottom surface so as to open, and discharges the wastewater boiled in the high temperature chamber to the outside by the water vapor pressure in the chamber. You .

[0006]

According to the present invention, since the high temperature chamber of the heat treatment apparatus and the dirty water tank are communicated with each other through the dirty water supply pipe, the dirty water flows into the high temperature chamber due to the water pressure of the dirty water. At this time, if the high temperature chamber is heated above the boiling point of the sewage by the heater, the sewage is heated and boiled, and when the sewage further flows in and the inlet of the siphon tube for discharge is blocked, the high temperature is caused by steam. Since the pressure in the chamber becomes high, the sewage does not flow any further, and only the sewage in the high temperature chamber is boiled and sterilized by heating.

Next, when the wastewater is further boiled to increase the pressure in the high temperature chamber, the sterilized wastewater is discharged to the outside through the discharge siphon tube. At this time, since the excrement and urine are completely melted by heating, the siphon tube is not clogged. Then, when the sewage is discharged and the water level falls below the inlet of the siphon pipe, the pressure in the high temperature chamber decreases, the sewage flows into the high temperature chamber from the sewage tank, and the newly introduced sewage is boiled. , Sewage is treated continuously without using a feeding device such as a pump. The high temperature chamber and the heater are covered with a heat insulating material, and most of the heat is used only for heating the sewage through the high temperature chamber, so the thermal efficiency is high, and no pump or the like is required, so energy consumption is high. Also few.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on the embodiments shown in the drawings. FIG. 1 is a cross-sectional view showing an example configuration of a sewage treatment apparatus according to the present invention.

Reference numeral 1 denotes a sewage treatment apparatus for heat-sterilizing sewage containing water-soluble contaminants such as manure, which temporarily stores sewage containing manure that flows from a toilet bowl or the like (not shown). The sewage tank 2 is provided with a heat treatment device 3 for heating the sewage fed from the sewage tank 2, and a recovery tank 4 for collecting the sewage after the heat treatment.

The heat treatment apparatus 3 comprises a high temperature chamber 5 for boiling sewage, and a heater 6 for heating the inside of the chamber 5 to a temperature above the boiling point of sewage. And the high temperature chamber 5
Is formed of a metal such as stainless steel or titanium having a high thermal conductivity and a high corrosion resistance, and its plane area is selected to be about half the area of the heater 6. The high temperature chamber 5 and the heater 6 are covered and covered with a heat insulating material 7 so that the heat does not leak to the outside.
The gap is filled with a heat conductive material 8 that transfers the heat of the heater 6 to the side surface and the ceiling surface of the high temperature chamber 5.

Further, a feed pipe 9 communicating with the inside of the waste water tank 2 is connected to the bottom surface of the high temperature chamber 5 or in the vicinity of the bottom surface, and the waste water is stored in the waste water tank 2 due to the water pressure of the waste water. It is designed to be delivered inside. A branch pipe 9a whose upper end is closed is erected upright in the vicinity of the end on the sewage tank 2 side of the supply pipe 9, and a vertical head difference between the sewage tank 2 and the high temperature chamber 3 is provided. A pressure adjusting portion 9b is formed so as to be formed in an annular shape.

Reference numeral 10 denotes a discharge siphon tube for discharging the dirty water boiled in the high temperature chamber 5 to the recovery tank 4 by the water vapor pressure in the chamber 5, the inlet 10a of which is near the bottom surface in the high temperature chamber 5. At the height of 1, and is guided to the outside of the high temperature chamber 5, the discharge port 10b is opened at a position higher than the maximum water level of the waste water tank 2, and the waste water discharged from the discharge port 10b is collected in the recovery tank 4. To be done.

Reference numeral 11 indicates that the steam in the high temperature chamber 5 is discharged to the recovery tank 4 via the discharge siphon pipe 10 and is made to flow back to the waste water tank 2 via the feed pipe 9. It is a pressure adjusting pipe that automatically adjusts the pressure in the high temperature chamber 5 so as to repeat alternately. Even if the pressure adjusting pipe 11 and the branch pipe 9a and the pressure adjusting portion 9b of the supply pipe 9 are not provided, the sewage can be continuously treated. However, by providing these, the water vapor frequently flows backward. It was experimentally confirmed that it would occur. As a result, even if, for example, paper is clogged at the inlet (not shown) of the water supply pipe 9 on the side of the dirty water tank 2 to cause clogging, water vapor frequently flows backward and the clogging is automatically eliminated. It

The above is an example of the configuration of the present invention, and its operation will be described below. In advance, the heater 6 is turned on to heat the entire high temperature chamber 5 so that the internal temperature becomes equal to or higher than the boiling point of the waste water, and the waste water is discharged from the waste water stored in the waste water tank 2 through the feed pipe 9 to the high temperature chamber. Send within 9. Since the high temperature chamber 5 is heated above the boiling point of the waste water, the waste water that has flowed into the high temperature chamber 5 is boiled in an instant, but the waste water further flows in and the inlet 10a of the siphon tube 10 for discharge is blocked. Then, the pressure in the high temperature chamber 5 increases due to the water vapor obtained by boiling the sewage, so that the sewage does not flow any further and the high temperature chamber 5
Only the wastewater inside is boiled and sterilized by heating.

Next, when the wastewater is further boiled to increase the pressure in the high temperature chamber 5, the sterilized wastewater is discharged to the recovery tank 4 through the discharge siphon pipe 10. Since the sterilization treatment of the wastewater recovered in the recovery tank 4 has been completed, most of the Escherichia coli and other pathogenic bacteria have been killed, and this can be used as it is as a fertilizer. Moreover, since the excrement and urine are completely melted by being heated, the siphon tube 10 is not clogged.

When the sewage is discharged and the water level falls below the inlet 10a of the siphon pipe 10, the pressure in the high temperature chamber 5 decreases, and the sewage flows into the high temperature chamber 5 from the sewage tank 2 and newly flows in. The treated wastewater is boiled, and the wastewater is continuously treated in the same manner as described above. Since the high temperature chamber 5 and the heater 6 are covered with the heat insulating material 7 and most of the heat is used only for heating the sewage through the high temperature chamber 5, the thermal efficiency is high and the energy loss is small.

[0017]

As described above, according to the present invention, the energy used is only the heater for heating the sewage,
Since the dirty water is automatically supplied / discharged by the pressure change in the high temperature chamber and the siphon pipe for discharging, it has an extremely simple structure without using any pump or the like for supplying / discharging the dirty water, and a little energy consumption. It has an extremely excellent effect that a large amount of sewage including feces and urine can be heated and sterilized to the extent that it can be directly used as fertilizer.

[Brief description of drawings]

FIG. 1 is a sectional view showing a sewage treatment apparatus according to the present invention.

[Explanation of symbols]

 1 ... Sewage treatment device 2 ... Sewage tank 3 ... Heat treatment device 5 ... High temperature chamber 6 ... Heater 7 ... Insulation material 9 ... Supply pipe 10 ... For discharge Siphon tube

Claims (1)

[Claims] 1. A sewage treatment apparatus for heat-sterilizing sewage containing water-soluble pollutants such as manure, which comprises: a sewage tank (2) for temporarily storing sewage; and a sewage tank (2) The heat treatment device (3) heat-sterilizes the sewage to be fed, and the heat treatment device (3) has a high temperature chamber (5) for boiling the sewage and a temperature equal to or higher than the boiling point of the sewage in the chamber (5). A heater (6) for heating to
And the high temperature chamber (5) is covered with a heat insulating material (7) to prevent the heat from leaking to the outside, and the waste water tank (2)
A feed pipe (9) for feeding the sewage by the water pressure of the sewage therein is connected so as to open at or near the bottom of the high temperature chamber (5), and the sewage boiled in the high temperature chamber (5) A sewage treatment apparatus comprising a discharge siphon pipe (10) for discharging the gas to the outside by the water vapor pressure in the chamber (5).