JP2010188315A - Treating method and facility of raw water containing organic pollutant or toxic substance - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively remove toxicity and malodor of raw water containing organic pollutants or toxic substances like harmful microorganisms and chemical substances, besides algae, without separately setting a reactive gas injection apparatus or a surplus reactive gas treatment apparatus. <P>SOLUTION: The reactive gas is filled in a sealed vessel 2 in advance, the raw water containing organic pollutants or toxic substances is sprayed at a high pressure in the reactive gas atmosphere to impinge onto an impact plate 4 to atomize the raw water, and at the same time, to react the atomized raw water with the reactive gas filled in the sealed vessel 2. A water sump 22 is formed in the sealed vessel 2 to store the treating water after impingement at a given water level of L1-L2. The reactive gas is stored in advance in the sealed vessel 2 at the part above the water level of L1-L2 of the treating water stored in the water sump 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method and equipment for treating raw water containing organic pollutants or toxic substances.

  Conventionally, as an example of a method and facility for treating raw water containing organic pollutants or toxic substances, raw water containing algae that are organic pollutants is jetted at a high pressure in a sealed container and collided with an impact plate. There is an algae-killing method and apparatus for destroying algae by impact and killing algae (see Patent Document 1). With this technology, it is possible to suppress the growth of algae and to preserve the water quality of a reservoir or the like.

  Then, the treated water is returned to the reservoir or the like as it is to promote the food chain of the reservoir or the like, or sprayed on floating islands or the like (see Patent Document 2).

  Although the techniques of Patent Documents 1 and 2 can suppress the growth of algae, the toxicity and odor possessed by algae cannot be removed. Therefore, an ozone gas (reactive gas) injection device is installed separately from the algaecidal device, and ozone gas is injected into the treated water to remove the algae's toxicity and odor.

Japanese Patent No. 2835574 Japanese Patent No. 3535819

  However, when an ozone gas injection device such as a treated water storage tank is separately installed, there is a problem that the equipment is enlarged and the equipment cost is increased. Further, it is difficult to control the amount of ozone gas injected, and a surplus (waste) ozone gas processing apparatus is required separately, which causes the problem that the equipment is further increased in size and the equipment cost is increased.

  The present invention has been made to solve the above-described problems, and it is not necessary to separately install a reactive gas injection device, an excess reactive gas processing device, etc., and not only algae but also harmful microorganisms and An object of the present invention is to provide a method and facility for treating raw water containing organic pollutants or toxic substances, which can effectively remove the toxicity and odor of raw water containing organic pollutants such as chemical substances or toxic substances. Is.

  In order to solve the above-mentioned problems, the first means of the present invention is that the closed container is prefilled with a reactive gas, and an organic pollutant or a toxic substance is contained in the reactive gas atmosphere. An organic pollutant characterized by spraying raw water at a high pressure and atomizing the raw water by colliding with an impact plate, and at the same time reacting the atomized raw water with a reactive gas filled in a sealed container or The present invention provides a method for treating raw water containing toxic substances.

  As in claim 2, in claim 1, the reactive gas is preferably any one of ozone gas, chlorine gas, chlorine dioxide gas, carbon dioxide gas, ammonia gas, and oxygen gas.

  According to a third aspect of the present invention, the closed container is filled with a reactive gas in advance, and raw water containing organic pollutants or toxic substances is injected at a high pressure in the reactive gas atmosphere. A raw water treatment facility containing organic pollutants or toxic substances that makes the raw water atomized by colliding with a plate and simultaneously reacting the atomized raw water with a reactive gas filled in a sealed container, A nozzle that injects the raw water at high pressure in the upper part of the sealed container and the impact plate that collides the raw water ejected from the nozzle are disposed, and the lower part in the sealed container is subjected to collision with the impact plate. A water reservoir is formed to store the treated water at a predetermined water level, and a reactive gas atmosphere is formed by prefilling the reactive gas in the sealed container above the water level of the treated water accumulated in the water reservoir. A reactive gas supply device was installed. There is provided a raw water treatment facility including organic contaminants or toxic substances, characterized and.

  As in claim 4, in claim 3, an upper limit and a lower limit of the water level of the treated water accumulated in the water reservoir in the sealed container are set, and the water level of the treated water is maintained within the upper limit and lower limit ranges. It is preferable to provide a control device for controlling the gas pressure of the reactive gas.

  As in claim 5, in claim 3 or 4, the reactive gas is preferably any one of ozone gas, chlorine gas, chlorine dioxide gas, carbon dioxide gas, ammonia gas, and oxygen gas.

  According to claim 1 of the present invention, the raw water containing organic pollutants or toxic substances is injected at a high pressure in the reactive gas atmosphere in the sealed container, and at the same time the raw water is atomized by colliding with the impact plate. The atomized raw water is reacted with the reactive gas filled in the sealed container.

  Therefore, for example, when organic pollutants or toxic substances are algae and the reactive gas is ozone gas, the algae in the raw water are destroyed by impact by colliding the raw water containing algae with the impact plate at high pressure. Algae will be killed. In addition, the toxicity of algae will be degraded.

  At the same time, since the raw water collides with the impact plate in the ozone gas atmosphere, the raw water is atomized by the collision, and this atomized (fine particle) raw water is filled in the sealed container and is easily in contact with the filled ozone gas. As a result (gas-liquid mixing), the reaction between the atomized raw water and ozone gas is promoted. Thus, by promoting the reaction, the toxicity and odor of algae can be effectively removed by oxidative decomposition.

  As a result, when organic pollutants or toxic substances are algae and the reactive gas is ozone gas, there is no need to install an ozone injection device separately, and an ozone gas supply device is added to existing impact algae killing devices, etc. It is possible to effectively remove the toxicity and odors of algae with only a few modifications such as. Similarly, when the reactive gas is chlorine gas or chlorine dioxide gas, the toxicity of algae is decomposed.

  On the other hand, as organic pollutants or toxic substances, wastewater (raw water) from hospitals containing microorganisms such as harmful viruses and bacteria, wastewater (raw water) from alcohol and juice manufacturing factories containing microorganisms that rot, harmful Reacts even with agricultural wastewater (raw water) containing various agricultural chemicals, wastewater (raw water) from chemical factories, etc. containing harmful dioxins and PCBs (chemical substances), and underground contaminated water (raw water) in factory sites and landfills If ozone gas, chlorine gas, or chlorine dioxide gas is used as the reactive gas, toxicity, odor, and the like can be effectively removed by oxidative decomposition.

  In addition, when the reactive gas is carbon dioxide, neutralization of the alkaline atomized raw water is effectively promoted, and when the reactive gas is ammonia gas, Sum is effectively promoted. In addition, when the reactive gas is oxygen gas, oxygen dissolution of oxygen-free atomized raw water (oxygen-free water in which living organisms cannot survive) is effectively promoted.

  According to claim 3 of the present invention, raw water containing organic pollutants or toxic substances is jetted from a nozzle at high pressure in a reactive gas atmosphere in a sealed container, and the raw water is atomized by colliding with an impact plate. At the same time, the atomized raw water is reacted with the reactive gas supplied from the reactive gas supply device and filled in the sealed container.

  Therefore, for example, when organic pollutants or toxic substances are algae and the reactive gas is ozone gas, the algae in the raw water are destroyed by impact by colliding the raw water containing algae with the impact plate at high pressure. Algae will be killed. In addition, the toxicity of algae will be degraded.

  At the same time, since the raw water collides with the impact plate in the ozone gas atmosphere, the raw water is atomized by the collision, and this atomized (fine particle) raw water is filled in the sealed container and is easily in contact with the filled ozone gas. As a result (gas-liquid mixing), the reaction between the atomized raw water and ozone gas is promoted. Thus, by promoting the reaction, the toxicity and odor of algae can be effectively removed by oxidative decomposition.

  Furthermore, since the ozone gas atmosphere is only formed in the sealed container above the water level of the treated water collected in the lower water reservoir in the sealed container, the ozone gas is not discharged to the outside.

  As a result, when the organic pollutant or toxic substance is algae and the reactive gas is ozone gas, there is no need to separately install an ozone injection device or a surplus (waste) ozone treatment device. By adding a slight modification such as adding an ozone gas supply device, etc., the toxicity and odor of algae can be effectively removed.

  In addition, even if it is the waste water (raw water) from the hospital etc. containing microorganisms, such as harmful viruses and bacteria, as an organic pollutant or a toxic substance, the effect similar to Claim 1 can be show | played.

  According to the fourth aspect, since the control device controls the gas pressure of the reactive gas so that the water level of the treated water in the water reservoir in the sealed container maintains the upper and lower limits, the sealed container An appropriate amount of reactive gas can always be supplied into the interior.

It is a system diagram of the processing equipment of the raw water containing the organic pollutant or toxic substance of the embodiment of the present invention. It is a conceptual diagram of the principal part of the installation of FIG. It is a perspective view of the modification of a nozzle.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIG. 1 is a system diagram of a raw water treatment facility 1 containing organic pollutants or toxic substances according to the present invention, and FIG. 2 is a conceptual diagram of a main part of the facility of FIG.

  First, the schematic configuration and operation of the main part of the raw water treatment facility 1 containing organic pollutants or toxic substances will be described with reference to FIG. A nozzle 3 that jets raw water containing organic pollutants or toxic substances at high pressure and an impact plate 4 that collides the raw water jetted from the nozzle 3 are arranged in the sealed container 2. Here, the organic pollutant or the toxic substance is “algae” as an example, and the raw water containing the organic pollutant is “raw water containing algae”.

  From the nozzle 3, for example, raw water pressurized to 0.7 MPa is injected at a speed of 20 to 30 m / sec (see arrow a). By causing the raw water sprayed from the nozzle 3 to collide with the impact plate 4, the algae in the raw water are destroyed by the impact and are killed.

  And the treated water after the collision which collected on the bottom part in the airtight container 2 comes to be drained out of the airtight container 2 from the drain outlet 5 (refer arrow b).

  As shown in FIG. 1, the sealed container 2 has a vertically long cylindrical shape, and is sealed by a top 2a and a bottom 2b. For reference, when algae is killed by the treatment facility 1 to preserve the water quality of the vast reclaimed pond that has been closed off by the partition wall, the treatment facility 1 is installed in an area where algae are blown by the wind, etc. For example, the one having a diameter D of about 2 m and a height H1 of about 4 m is used.

  The nozzle 3 penetrates the center of the bottom 2b of the sealed container 2 from the outside and faces the sealed container 2, and the upward nozzle port 3a at the upper end faces the top 2a.

  A raw water supply pipe 7 is connected to the lower end of the nozzle 3 outside the sealed container 2, and a high pressure pump 8 for pressurizing the raw water and a raw water adjustment valve 9 for adjusting the amount of raw water are connected to the raw water supply pipe 7. And are provided.

  The impact plate 4 is suspended and supported by a plurality of support members 10 from the top 2a so as to face the nozzle opening 3a of the nozzle 3 at a predetermined interval in the vicinity of the top 2a in the sealed container 2. It is installed downward. And the raw | natural water sprayed from the nozzle opening 3a of the nozzle 3 comes to collide with the lower surface of the impact board 4 (refer arrow a). As shown in FIG. 3, when the impact plate 4 has a large outer diameter, a plurality of nozzle openings 3 a are branched from the nozzle 3 so that the sprayed raw water collides with the impact plate 4 evenly. You can also

  An external drain pipe 12 is connected to the drain outlet 5 of the bottom 2b of the sealed container 2, and a partition valve 13 for adjusting the amount of drainage is provided in the drain pipe 12. Then, the treated water that has accumulated on the bottom 2b in the sealed container 2 is drained out of the sealed container 2 from the drain port 5 through the drain pipe 12 (see arrow b).

  The drain pipe 12 is bent in a substantially horizontal direction after being raised at the height H2 from the bottom 2b on the downstream side of the partition valve 13. This height H2 will be described later.

  A water level meter 14 that can visually observe the water level in the sealed container 2 from the outside is provided outside the sealed container 2.

  At the top 2a of the sealed container 2, an ozone gas supply pipe 16 is penetrated downward from the outside through the center of the top 2a so as to face the sealed container 2, and the downward supply port 16a at the lower end faces the upper surface of the impact plate 4. ing.

  The other end of the ozone gas supply pipe 16 is connected to an ozone gas generator (reactive gas supply device) 17. The ozone gas supply pipe 16 includes an ozone gas adjustment valve 18 that adjusts the amount of ozone gas, and ozone gas in the sealed container 2. A pressure gauge 19 for detecting the gas pressure and a safety valve 20 are provided.

  A water reservoir 22 is formed in the lower part of the hermetic container 2 to store treated water after colliding with the impact plate 4 at a predetermined water level L1 to L2. Then, ozone gas (reactive gas) is prefilled in the sealed container 2 above the water levels L1 to L2 of the treated water accumulated in the water reservoir 22 to form an ozone gas atmosphere.

  The upper limit L2 and lower limit L1 of the level of treated water accumulated in the water reservoir 22 in the sealed container 2 are set, and the gas pressure of the ozone gas is set so that the level of this treated water maintains the range between the upper limit L2 and the lower limit L1. A control device 23 that adjusts the amount of ozone gas by the ozone gas adjustment valve 18 while being detected by the pressure gauge 19 is provided.

  The above-described drain pipe 12 is raised at a height H2 upward on the downstream side of the partition valve 13.

  The reason for this is that if the drain pipe 12 is only bent substantially horizontally from the drain port 5 (see arrow c), the treated water after colliding with the sealed container 2 does not collect in the water reservoir 22. Ozone gas may also be discharged out of the sealed container 2 from the drain port 5. Accordingly, the upper limit L2 and the lower limit L1 of the water level of the treated water accumulated in the water reservoir 22 are set to prevent the ozone gas from being discharged out of the hermetic container 2 from the drain outlet 5 to the height H2. Was launched. Further, if the height H2 of the drain pipe 12 is lower than the upper limit L2 of the water level, the upper limit L2 of the water level cannot be maintained.

  As described above, in the case of the raw water treatment facility 1 containing algae which are organic pollutants or toxic substances, the raw water containing algae is jetted from the nozzle 3 at high pressure in the ozone gas atmosphere in the sealed container 2, and the impact plate The raw water can be atomized by making it collide with the water, and at the same time, the atomized raw water can be reacted with the ozone gas filled in the sealed container 2.

  Therefore, when the organic pollutant or toxic substance is algae and the reactive gas is ozone gas, the algae in the raw water is destroyed by impact by colliding the raw water containing algae with the impact plate 4 at high pressure. Algae will be killed. In addition, the toxicity of algae will be decomposed.

At the same time, since the raw water collides with the impact plate 4 in the ozone gas atmosphere, the raw water is atomized by the collision, and referring to FIG. 2, this atomized (fine particle) water d fills the sealed container 2; Similarly, since it becomes easy to come into contact with the filled ozone gas O ₃ (gas-liquid mixing), the reaction between the atomized water and the ozone gas is promoted. Thus, by promoting the reaction, the toxicity and odor of algae can be effectively removed by oxidative decomposition.

  As a result, when the organic pollutant or toxic substance is algae and the reactive gas is ozone gas, it is not necessary to install a separate ozone injection device, and the odor and toxicity of algae can be effectively removed. become.

  Moreover, since the ozone gas atmosphere is only formed in the sealed container 2 above the water levels L1 to L2 of the treated water accumulated in the lower water reservoir 22 in the sealed container 2, the ozone gas may be discharged to the outside. Absent.

  Furthermore, since the control device 23 controls the gas pressure of the ozone gas so that the water level of the treated water in the water reservoir 22 in the sealed container 2 is maintained in the range between the upper limit L2 and the lower limit L1, the inside of the sealed container 2 It is possible to always supply an appropriate amount of ozone gas.

  As a result, when the reactive gas is ozone gas, there is no need to separately install an ozone injection device or a surplus (waste) ozone gas processing device, and a slight amount such as adding an ozone gas generator 17 to an existing algaecidal device or the like. It is possible to effectively remove the odor and toxicity of algae by simply remodeling.

  In the above embodiment, the case where the organic pollutant or toxic substance is algae and the reactive gas is ozone gas is described.

  However, organic pollutants or toxic substances include, for example, wastewater from hospitals that contain microorganisms such as harmful viruses and bacteria (raw water), and wastewater (raw water) from factories that produce alcohol and juice containing microorganisms that are spoiled. However, if ozone gas, chlorine gas, or chlorine dioxide gas is used as the reactive gas, microorganisms are killed, and toxicity and odor are effectively removed by oxidative decomposition.

  In addition, as organic pollutants or toxic substances, for example, agricultural wastewater (raw water) containing harmful pesticides, wastewater (raw water) from chemical factories containing harmful dioxins, PCB (chemical substances), etc. Even if it is underground polluted water (raw water), if ozone gas, chlorine gas, or chlorine dioxide gas is used as a reactive gas, toxicity and odor can be effectively removed by oxidative decomposition.

  Further, when the reactive gas is carbon dioxide, neutralization of the alkaline atomized raw water is effectively promoted, and when the reactive gas is ammonia gas, the acidic atomized raw water is neutralized. Sum is effectively promoted.

  In addition, when the reactive gas is oxygen gas, oxygen dissolution of oxygen-free atomized raw water (oxygen-free water in which living organisms cannot survive) is effectively promoted, and aerobic water can be produced.

  Thus, depending on the type of organic pollutant or toxic substance, reactive gas can be properly used as necessary, such as ozone gas, chlorine gas, chlorine dioxide gas, carbon dioxide gas, ammonia gas, oxygen gas, etc. it can.

1 Processing equipment for raw water containing organic pollutants or toxic substances 2 Sealed container 3 Nozzle 4 Impact plate 17 Ozone generator (reactive gas supply device)
18 Ozone adjustment valve 19 Pressure gauge 22 Reservoir 23 Control device L1, L2 Water level

Claims (5)

  Reactive gas is filled in the sealed container in advance, and raw water containing organic pollutants or toxic substances is injected at high pressure in this reactive gas atmosphere, and at the same time, the raw water is atomized by colliding with the impact plate. A method for treating raw water containing organic pollutants or toxic substances, characterized in that the atomized raw water is reacted with a reactive gas filled in a sealed container.   2. The raw water containing organic pollutant or toxic substance according to claim 1, wherein the reactive gas is any one of ozone gas, chlorine gas, chlorine dioxide gas, carbon dioxide gas, ammonia gas and oxygen gas. Processing method. Reactive gas is filled in the sealed container in advance, and raw water containing organic pollutants or toxic substances is injected at high pressure in this reactive gas atmosphere, and at the same time, the raw water is atomized by colliding with the impact plate. A raw water treatment facility containing organic pollutants or toxic substances for reacting the atomized raw water with a reactive gas filled in a sealed container,
After the nozzle that jets the raw water at a high pressure and the impact plate that collides the raw water jetted from the nozzle are arranged at the upper part in the sealed container, and after the impact plate hits the lower part in the sealed container In addition to forming a water reservoir that accumulates the treated water at a predetermined water level, a reactive gas atmosphere is formed by prefilling the closed vessel above the water level of the treated water accumulated in the water reservoir in advance. An apparatus for treating raw water containing organic pollutants or toxic substances, characterized in that a reactive gas supply device is provided.   Control for controlling the gas pressure of the reactive gas so that the upper and lower limits of the level of the treated water accumulated in the water reservoir in the sealed container are set and the level of the treated water is maintained within the upper and lower limits. 4. The facility for treating raw water containing organic pollutants or toxic substances according to claim 3, wherein an apparatus is provided.   The organic pollutant or toxic substance according to claim 3 or 4, wherein the reactive gas is any one of ozone gas, chlorine gas, chlorine dioxide gas, carbon dioxide gas, ammonia gas, and oxygen gas. Including raw water treatment facilities.

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