JPS62213890A - Apparatus for purifying and heating waste water - Google Patents

Abstract

PURPOSE:To effectively recover generated heat, by arranging a rotor having undulated parts and a stator in a state close to each other and connecting the rotor to a rotary driving means. CONSTITUTION:A rotor 4 is rotated at 1,500-7,200 rpm by a rotary driving means 10 to continuously introduce ozone-containing air from a waste water introducing pipe 7. Waste water and ozone-containing air are stirred at a high speed by rotating the rotor 4 at a high speed and high speed shearing surfaces are formed between the perforation parts of the perforated plates 3 of a stator and the rotor 4, both of which provided so as to approach each other, and between the perforation parts and the plate parts to generate strong cavitation in waste water. By this mechanism, cavitation air bubbles are generated while the generated air bubbles are suddenly compressed in the compression stage of compression and expansion to generate high temp. and charge is generated on the surfaces of air bubbles to ionize the substance in each air bubble. Thus, reactivity is enhanced and the generated heat is recovered by a heat exchanger 19.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention involves mixing ozone-containing air or oxygen-containing gas such as air into wastewater to create a stator that removes undulating portions and a rotor with undulating portions that are softened in the vicinity of the stator. The high-speed rotation of the rotor generates strong capitivity in the wastewater containing the oxygen-containing gas between the two undulating parts, oxidizes and decomposes the pollutants in the wastewater, and at the same time generates capitivity. It relates to a device that raises the temperature of a liquid using the heat and oxidation heat generated during the process, and its purpose is to recover the increased heat.

Traditionally, wastewater purification methods include biological oxidation using bacteria, oxidation using air aeration under pressure or atmospheric pressure, wet combustion using high temperature and pressure, oxidation using ozone, ultraviolet rays, and sound waves. There are methods such as flocculation-sedimentation starch layer method, flotation layer method, and centrifugal layer method, but there is no method to reuse harmful organic wastewater.

In particular, the main focus of this invention is the potential energy for promoting the oxidation reaction, that is, capite.According to this, although the frequency can be increased, the amplitude of the oscillator is small, ranging from several tens of microns to two microns, and the impact force is weak. Although it is powerful, it is expensive, requires electrical equipment, is expensive, and generates only a small amount of energy. If the amount is too small or too large, the effectiveness is drastically reduced, and the addition method using air requires a lot of equipment and operating costs, and the fermentation method of organic wastewater also requires a large amount of installation cost. However, it had drawbacks such as the amount of organic gas generated varied greatly depending on changes in surrounding conditions.

This invention solves the above problems and provides a compact and inexpensive device for purifying wastewater and generating oxidation heat during the purification process. Energy efficiency of several hundred percent can also be achieved by recovering the generated heat. be able to.

To explain this with reference to the embodiment shown in the drawings, the closed cylindrical casing of the wastewater purification and temperature raising device 1 has an inner diameter of l.
The stator 5 is 0 mm in length, 200 mm in length, and has an undulating portion 6 inside, and has a thickness of 1 mm in which a large number of through holes (diameter of millimeters) are opened, about half of the total area. For example, five donut-shaped perforated plates 3 are closely fixed to the inner surface of the casing 2 at regular intervals, and between each of the perforated plates 3 and on both sides, a total of six small circular perforated plates having the same shape as the stator 5 are arranged. 3 is the casing 2 yen Ic1
The perforated plates 3 of the stator 5 and the rotor 4 are fixed at regular intervals to a rotating shaft 12 arranged in the length direction of the rotor 1, and the perforated plates 3 of the stator 5 and the rotor 4 each have a diameter of /~5 mm,
Preferably, the arrangement is such that there is a gap of 3 to 3.0 mm between the inner surface of the casing 2, the outer periphery of the perforated plate 3 of the rotor 4, the inner periphery of the perforated plate 3 of the stator 5, and the rotating shaft 1.
A gap of 2 to j millimeters is provided between the outer peripheries of the rotating shaft 12, and both ends of the rotating shaft 12 are connected to the casing 2.
(It is supported by a bearing 11 provided in IIW, one end of the rotating shaft 12 is connected to a rotational drive means 10 arranged outside the casing 2, and a waste water inlet pipe 7 and an oxygen-containing gas inlet are connected to one end of the casing 2. A pipe 8 is connected to the same end, a purified temperature rising liquid discharge pipe 9 is connected to the other end, and the casing 2,
The stator 5 and the rotor 4 are each made of corrosion-resistant stainless steel, for example, and the casing 2 and the rotation drive means 10 are fixed to, for example, a horizontal base 13. In this case, 1) the rotor 4 rotates; per minute/jOO~ by the drive means lO
If it is rotated at 7200 revolutions, the peripheral speed of the perforated plate 3 of the rotor 4 will be 10 - per second! ;becomes 0 meters.

2) Waste water, such as organic waste water, is continuously introduced from the waste water introduction pipe 7, and ozone-containing air, which is an oxygen-containing gas, is continuously introduced from the oxygen-containing gas introduction pipe 8. The ozone-containing air is rotated at high speed and stirred at high speed through small gaps. I am made to do so.

4) Forces between the stator 5 and the rotor 4, which are located close to each other, are generated and strong cavitation occurs.

5) Cavitation bubbles are generated when liquid expands due to strong negative pressure. This generated bubble is compressed by the device during the compression stage of compression and expansion that is repeated at a high frequency, resulting in several hundred atmospheres inside the bubble and a corresponding high temperature of several hundred degrees Celsius, and the temperature outside the bubble is relatively high. Electric charges are generated at the boundary between the low-temperature liquid part and the high-temperature region inside the bubble, that is, on the bubble surface.

6) Although the electric charge generated is weak, the bubbles themselves are small, 0.1 to 5 microns, and a strong electrical discharge occurs within the bubbles, ionizing the vaporized substance within the bubbles.

7) The cavitation bubbles eventually burst and generate a strong shock wave, which breaks the molecular bonds of the pollutants in the surrounding wastewater and turns them into low-molecular molecules.The ions generated in the bubbles enter the wastewater and undergo an oxidation reaction. Increases reactivity. This generated *m force further disperses the ozone-containing air bubbles mixed into ultrafine particles of 7 to 10 microns, thereby increasing the reaction area and increasing the reactivity.

8) Due to the high speed rotation of rotor 4, rotor 4 and stator 5
When the surface of the liquid is rubbed with S, heat is generated, and along with the energy from the cavity silicone, the potential energy for the oxidation reaction due to ozone and oxygen in the air increases the temperature of the liquid.

9) Ozone, which has a strong bactericidal power, not only oxidizes and decomposes organic substances in wastewater in a short time with its strong oxidizing power, but also completely kills bacteria and eliminates harmful substances in wastewater.

10) The above-mentioned action takes place between the perforated plates 3 of the stator 5 and rotor 4, and in the process in which wastewater and ozone-containing air are transferred between the perforated plates 3 to the discharge side, pollutants in the wastewater are removed. It is completely oxidized and decomposed, and the temperature of the liquid is raised by oxidation heat, cavitation heat, friction heat, etc.

11) The purified and heated liquid containing the gas is sent from the purified heated liquid discharge [9] to a heat recovery device, for example, a heat exchanger 19, where it is heat exchanged with a liquid such as water or a gas such as air, depending on the purpose of use. The purified water, which is used for heating and cooling or various types of heating, is discharged into a river or the sea from the purified water discharge pipe 20.

In the above example, ozone-containing air containing ozone with strong oxidizing power was used to oxidize pollutants in wastewater, but the amount of ozone that can be generated in the air is at most 2 to 4! It is possible to achieve complete oxidation by increasing the amount of air and slightly increasing the processing time, even by using only air, which is the cheapest method (% by weight), by obtaining strong energy from cavities. The heat recovery device may be a heat pipe, a heat pump, or the undulating portions 6 of the rotor 4 and stator 5.
Without being limited to the perforated plate 3 used as the second embodiment, FIG. 3, FIG. 5, FIG. As shown in Figure 6, the radial protrusions W provided every 5 degrees over the entire circumference are not chevrons or tooth shapes, but are short pieces (even if there are
As in the first embodiment, when wastewater that does not contain solids is introduced into the devices of the first and second embodiments, the purified and heated liquid is sent directly to the heat recovery device, but the wastewater is If it contains solid fugitives, use the above device to send it to the upper separation tank 17 for acid purple-containing gas used for oxidative decomposition of pollutants.
The solid substances that have not been oxidized and decomposed are floated and fractionated, and the solid substances in this state are sent to the heat recovery device from the purified temperature rising liquid discharge vR9 connected to the bottom of the flotation tank 16 as in the previous embodiment. This process is shown as a process diagram in Figure R.

Figure 9 and Figure 1O are the third actual example, and the difference from the first embodiment is that the three perforated plates 3 provided on the same trochanter 4 have approximately 70 mm diameter on the waste water introduction side. Leave a millimeter gap 1. A donut-shaped flat plate baffle plate 14 is tightly fixed to the circular surface of the casing 2, and a gap of about 10 mm is provided on the waste water introduction side of the baffle plate 14, and a gap of about 10 mm is provided at intervals of 10 mm each. Three perforated plates 3 having the same shape as the perforated plates 3 of the rotor 4 used in the example are fixed to the rotating shaft 12, and the high-density substance discharge pipe 11 is connected to the casing 2 on the waste water introduction side beside the baffle plate 14. Furthermore, a pulp 18 for adjusting the discharge amount is connected to this high-density substance discharge pipe 11, and a secondary purification liquid discharge pipe 15 is connected to the discharge side end of the casing 2. Further, a flange type motor 10 (rotation drive means) is directly connected to one side wall of the casing 2 of the wastewater purification and temperature raising device ll, and the rotation shaft of the motor 10 is connected to the rotation shaft 12 of the device 1.
Only both ends of the casing 2 are injected at t, 1. In this, wastewater containing solid substances is continuously introduced from the wastewater introduction pipe 7, and ozone-containing air is continuously introduced from the oxygen-containing gas introduction pipe 8. In this case, high-density substances contained in the wastewater are collected on the inner surface of the casing 2 by force due to the high-speed rotation of the three perforated plates 3 on the wastewater introduction side, and are discharged from the high-density substance discharge pipe 11. It is separated and discharged while adjusting the amount by the valve 18, and is incinerated after IliJm. On the other hand, wastewater and ozone-containing air after high-density substances have been separated migrate to the discharge side through the many holes with a diameter of about g millimeters in the three perforated plates 3. Via the part close to the hit +5, Via the gap between the center hole of the flat donut-shaped baffle plate 14 with a gap of S ~ 10 mm from the outer circumference of the rotating shaft 12, After that, the oxidative decomposition and heating of the liquid are carried out in the same manner as in the first and second embodiments, but if the solid material contains incompletely treated solid material, the solid material may has a low specific gravity with many ultra-fine air bubbles attached to its surface, and the wastewater in the treatment process containing solid substances in this state is floated and separated from the 7th purification heated liquid discharge pipe 15. It is sent to a tank 16, solid substances are separated, and the purified and heated liquid is heat-exchanged into gas or liquid by various heat recovery devices, such as a heat exchanger 19, and then used for various purposes. This process has the effect of reaching several times the calories compared to the operating power of the apparatus 1 shown in FIG. 11. The reason why a lot of heat can be generated during the oxidative decomposition and oxidative decomposition of the polluted mats contained in such wastewater is because, as mentioned above, the device of this invention produces a powerful and large amount of cavitation that could not be obtained with small amplitude ultrasonic waves. This is due to the fact that it can occur due to

In the above embodiment, the perforated plate 3 used as an example of the undulating part 6 was used, but the part where the stator 5 and rotor 4 for cavitation generation are arranged close to each other was used. A method may be used in which only heat is extracted from the incompletely purified wastewater that has wetted the perforated plate 3, and then the heat is completely purified through biological oxidation treatment. A diesel engine or a steam turbine that can be operated may be used, and the rotary drive means 10 and the rotor 4 may be connected by belt drive or indirect magnet drive.

[Brief explanation of drawings]

The drawings show embodiments of the present invention; FIG. 1 is a longitudinal sectional view of the first embodiment, FIG. 2 is a sectional view taken along line A-A in the first factor, and FIG. 7113 is a second embodiment. Longitudinal sectional view of, No. 4
The figure is a vertical cross-sectional view of the third embodiment taken along line B-B in FIG.
The first OrM is a sectional view taken along the line DD in FIG. 9, and FIG. 11 is a process diagram.

Claims (3)

[Claims] (1) An undulating portion 6 is provided inside the closed cylindrical casing 2 with a bottom.
A rotor 4 and a stator 5 having undulating portions 6 of both 4 and 5 are arranged in close proximity to each other, and the rotor 4 is connected to a rotation driving means 10 provided on one side of the casing 2. , a wastewater purification and heating device in which a wastewater introduction pipe 7 and an oxygen-containing gas introduction pipe 8 are connected to one side of a casing 2, and a purification temperature raising liquid discharge pipe 9 is connected to the other end thereof. (2) The wastewater purification and temperature raising device according to claim 1, wherein the undulating portion 6 is a perforated plate 3 having through or non-through holes. (3) The wastewater purification and temperature raising device according to claim 1, wherein the undulating portions 6 are protrusions or protrusions in a chevron shape, a tooth shape, a wave shape, or the like.