JPS62160200A - Pressure type activated sludge system - Google Patents

Abstract

PURPOSE:To contrive effective utilization of energy, by burning fuel injected by utilizing excessive air in exhaust gas to form high pressure and high temp. gas to obtain power. CONSTITUTION:Fuel is injected in a combustion chamber 3 by a fuel jet valve 4 and burnt to produce high temp. and high pressure gas which is, in turn, guided to a gas turbine 6 to generate power. A compressor 8 or a water supply pump 11 is driven by this power. By this method, power energy can be effectively utilized.

Description

DETAILED DESCRIPTION OF THE INVENTION Activated sludge systems are a promising method of wastewater treatment. In order to make this process even more efficient and compact, a system called the deep shaft process has been developed in recent years, in which the reaction is carried out at high pressure in a deep well-shaped hole. By increasing the pressure, the partial pressure of oxygen in the water also increases, promoting the reaction and increasing the pressure nearly 10 times to around 10 atmospheres. In this case, it is necessary to fart into a deep well, and the excess air, carbon dioxide, nitrogen gas, etc. that are exhausted are simply dumped into atmospheric pressure, wasting valuable pressure energy. Of course, some of this is used to circulate sewage, but it is extremely inefficient, and deep wells may be difficult and expensive due to geological conditions.

Further, processing of slatch generated as a result of processing requires a separate complicated system, which is high in cost and not economical.

The inventor of this invention aims to improve these by making use of the excess air in the exhaust gas, injecting fuel into it and combusting it to produce high-pressure, high-temperature gas, which is then used to power the gas turbine.
This power can be used to drive compressors and pumps, eliminating the burden of extra power due to pressurization. Furthermore, the surplus power can be used for various other purposes.

In addition, various methods have been tried to deal with the sludge produced in the activated sludge method, such as incinerating it in a hearth or turning it into fertilizer. This incineration does not self-combust unless it is sufficiently dried and smoked, and the dehydration and dry glazing process is a problem. In the present invention, even if oil, gas, coal, etc. are actively used to supplement combustion, this energy is effectively utilized as motive power, so the amount of dynamic fuel can be increased, and even undried water-containing sludge can be completely incinerated. In this case, in addition to the usual auxiliary combustion method, it is also possible to use COM and CIA/H, which uniformly mix petroleum or coal powder in the water-containing slatch and combust it. Pressure energy will also be guided to a hydraulic turbine to recover the power and be used to drive the water supply pump.

Next, in this system, a large amount of air works effectively and a sufficient amount of excess air can exist economically, so this system can reduce a considerable portion of the nitrogen content that cannot be removed with ordinary activated sludge methods. To explain the details in detail, FIG. 1 is an overall structural diagram of the present invention, and 1' is a reactor for treating sewage.

The pressure in this reactor I is usually around 10 atmospheres. This GM? J9 includes a small-diameter tower-shaped pressure vessel, a large number of bee-shaped aggregates of small-diameter, low-profile pressure vessels, and the pressure vessel itself is made of cement using recently developed cement technology. It can also be a pressure vessel. Carbon, glass, steel, etc. can be used as reinforcing fibers. The figure shows a case where the pressure vessel is 3 times. After the exhaust gas reacts in the water, it rises, separates from the water surface, and is led to the top. At this time, water droplets may accompany the exhaust gas, so to prevent this, a separator 2 is provided at the outlet to separate the water droplets.

As a result, the exhaust gas exits as dry gas. 3 is a combustion chamber in which fuel is combusted to produce high-temperature, high-pressure gas. At this time, a separate slatch-containing water injection valve is installed,
At the same time, they can be transferred and fired. Alternatively, petroleum or pulverized coal may be uniformly mixed in slatch-containing water, such as COM or CWM, and then burned. 4 is a fuel injection valve and 5 is a slatch-containing water injection valve. 6 is a gas turbine. In some cases, the slatch may be treated separately, the gas turbine may be used as a mere low-temperature exhaust expander for only part of the power recovery, and the thermal combustion chamber 3 may be eliminated to simplify the system. 7 is a generator. 8 is an air compressor. 9 is a driving electric nada. 10 uses the exhaust heat of the gas turbine 6,
This is a regenerative heat exchanger that preheats the air in the combustion chamber 3. 11
12 is a water supply pump that uses a diaphragm pump to pressurize wastewater containing various substances. 12 is a water turbine that recovers the pressure energy of the treated wastewater and supplies it to the water supply pump 11. Assists with driving. 13 is a drive 1II71 electric motor of the water supply pump 11.

[Brief explanation of drawings]

FIG. 1 is an overall structural diagram of the present invention.

Claims (1)

[Claims] A sewage treatment system in which sewage is placed in a pressurized container and activated sludge, the reaction of which is promoted by pressurized air, is applied to the sewage, and power is generated by using the energy of exhaust and wastewater. Pressurized activated sludge system for recovery.