JP2013240739A - Regeneration system of adsorption treatment facility, regeneration method, and desalination system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a regeneration system of an adsorption treatment facility, along with a regeneration method and a desalination system, capable of efficiently performing the oxidation treatment of organic matter deposited on an adsorbent surface.SOLUTION: A regeneration system of an adsorption treatment facility includes: an adsorption treatment facility 1 having an adsorbent 2 for removing organic matter from a raw water 11 containing salts; a fresh water injection means 33 for removing salts from the surface of the adsorbent 2 by injecting a fresh water 37 into the adsorption treatment facility 1; and a hot gas injection means 21 for injecting a hot gas 23 containing oxygen into the adsorption treatment facility 1 to oxidize the organic matter deposited on the adsorbent 2.

Description

  The present invention relates to a regeneration system, a regeneration method, and a desalination system for an adsorption treatment facility provided in the front stage of a membrane in a desalination system using a membrane for obtaining fresh water from seawater or brine.

  In recent years, seawater desalination systems and brine water desalination systems that perform filtration using a semipermeable membrane tend to increase. Semipermeable membranes include reverse osmosis membranes and forward osmosis membranes depending on the structure and usage. These semipermeable membranes are made of materials such as cellulose and polyamide, and in the case of reverse osmosis membranes, by applying a pressure higher than the osmotic pressure of the supplied seawater or brine, Permeate to suppress permeation of salt and obtain fresh water.

  In general, seawater and brackish water contain not only salt but also organic matter. For this reason, microorganisms contained in seawater or brackish water or microorganisms that have entered from the air ingest and grow this organic matter, causing biofouling on the surface of the semipermeable membrane, and improving the permeability of the semipermeable membrane. May decrease.

  On the other hand, in order to remove organic substances contained in seawater and brackish water, an adsorption treatment facility filled with an adsorbent made of activated carbon or zeolite is provided as a pretreatment, so that the adsorption reaction by the adsorbent and the growth on the surface of the adsorbent By the intake by the microorganisms, the concentration of organic substances reaching the semipermeable membrane can be reduced, and biofouling on the semipermeable membrane surface can be reduced.

  However, organic substances accumulate in the adsorption treatment facility due to adsorption reaction by the adsorbent and ingestion by microorganisms grown on the surface of the adsorbent, so that it is necessary to remove the organic substance regularly or irregularly. There are methods for removing this organic matter, such as backwashing with water treated with an adsorption treatment facility and air washing by blowing air, but it is difficult to remove any organic matter that has entered the pores of the adsorbent. In addition, there has been a problem that environmental problems occur in which a large amount of organic matter is contained in the wastewater.

  In order to solve this problem, the following conventional techniques (Patent Documents 1 to 5) have been proposed so far. In each of the prior arts described in Patent Documents 1 to 5, high-temperature gas is blown into an adsorbent on which organic substances are adsorbed, and the attached organic substances are oxidized to convert carbon dioxide or a part thereof into carbon monoxide to form a gas. As a discharge.

JP-A-8-10757 JP-A 63-294945 International Publication No. 2006/049149 JP 2006-55713 A JP-T-3-501461

  However, when raw water containing salt, such as seawater or brine, is used, there are problems that it is difficult to apply or the efficiency of organic matter removal is low.

  In order to oxidize the organic matter adhering to the adsorbent by supplying a high-temperature gas, first, seawater or brine is drained from the adsorbent filling tank. However, if seawater or brackish water is simply removed, it is inevitable that drops containing salt adhere to the adsorbent surface and remain. When high temperature gas is supplied in this state, the salt of seawater or brine remaining before the organic matter is oxidized is precipitated as crystals on the surface of the adsorbent, which becomes an obstacle to the adsorbent pores and the adsorbent gap, The supply of the high temperature gas becomes insufficient, and the progress of the oxidation reaction is delayed.

  As a result, if the high-temperature gas is allowed to flow for the same time, there arises a problem that the organic matter removal rate from the adsorbent decreases. On the other hand, in order to obtain a desired organic matter removal rate, there is a problem that the supply time of the necessary high-temperature gas becomes long and the energy efficiency is lowered.

  Microorganisms adhering to the adsorbent store moisture in the body, and the moisture contains salt so that the osmotic pressure is balanced with external seawater or brine. When the high temperature gas is supplied in a state where microorganisms remain in this way, there are problems that salts in the body of the microorganisms precipitate and energy efficiency is lowered due to an increase in moisture to be evaporated.

For such problems, Patent Document 1, Patent Document 2, Patent Document 4 and Patent Document 5 are not considered at all and cannot be solved.
On the other hand, Patent Document 3 discloses that the remaining salts adversely affect the components of the adsorbent, but the adsorbent (zeolite) can be obtained by setting the temperature of the high-temperature gas as low as possible below 600 ° C. Only a method for suppressing the deterioration of the adsorbent by suppressing the reaction between the SiO ₂ therein and the salt Na is disclosed, and as a result, none of the above problems can be solved.

  Therefore, an object of the present invention is to provide a regeneration system, a regeneration method, and a desalination system for an adsorption treatment facility that can efficiently oxidize organic substances adhering to the adsorbent surface.

  In order to solve such problems, the present invention provides an adsorption treatment facility having an adsorbent that removes organic substances from raw water containing salts provided for a desalination system, and injecting fresh water into the adsorption treatment facility. A fresh water injection means for removing salts from the surface of the adsorbent; and a high temperature gas injection means for injecting a high-temperature gas containing oxygen into the adsorption treatment facility to oxidize organic substances adhering to the adsorbent. This is a regeneration system for an adsorption treatment facility characterized by the following.

  The present invention also relates to a method for regenerating an adsorption treatment facility having an adsorbent that removes organic matter from salt-containing raw water used in a desalination system, wherein fresh water is injected and the salt is introduced from the surface of the adsorbent. And a step of injecting a high-temperature gas containing oxygen to oxidize the organic matter adhering to the adsorbent.

  According to the present invention, it is possible to provide a regeneration system, a regeneration method, and a desalination system for an adsorption treatment facility that can efficiently oxidize organic substances adhering to the adsorbent surface.

It is a block diagram of a desalination system provided with the reproduction | regeneration system of the adsorption processing equipment which concerns on 1st Embodiment. It is a flowchart explaining the reproduction | regeneration processing of adsorption processing equipment. It is a block diagram of a desalination system provided with the reproduction | regeneration system of the adsorption processing equipment which concerns on 2nd Embodiment. It is a block diagram of a desalination system provided with the reproduction | regeneration system of the adsorption processing equipment which concerns on 3rd Embodiment.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate. In each figure, common portions are denoted by the same reference numerals, and redundant description is omitted.

<< First Embodiment >>
Drawing 1 is a lineblock diagram of a desalination system provided with a regeneration system of adsorption treatment equipment concerning a 1st embodiment.

As shown in FIG. 1, the desalination system includes an adsorption treatment facility 1 having an adsorbent 2 and a semipermeable membrane treatment facility 3 having a reverse osmosis membrane (not shown). The raw water 11 ”) is processed by the adsorption treatment facility 1 before flowing into the semipermeable membrane treatment facility 3 to become organic matter-reduced raw water 12 and flows into the semipermeable membrane treatment facility 3.
The organic matter-reduced raw water 12 that has flowed into the semipermeable membrane treatment facility 3 is separated into fresh water 13 and concentrated drainage 14 in which salt and the like are concentrated by a reverse osmosis membrane.

  Although not shown in FIG. 1, a two-layer filtration facility, a UF membrane filtration facility using a UF membrane (Ultrafiltration Membrane), or an MF membrane (Microfiltration Membrane; microfiltration membrane), although not shown in FIG. Pretreatment equipment such as MF membrane filtration equipment using) may be provided. In this case, the adsorption treatment facility 1 may be on the upstream side of the pretreatment facility, may be on the downstream side, or any of them.

  Here, as typical adsorbents, there are granular activated carbon, zeolite, ceramic, filter sand and the like. As the adsorbent 2 filled in the adsorption treatment facility 1 of the present embodiment, these adsorbents are used. Of these, inorganic adsorbents (zeolite, ceramics, filter sand, etc.) that do not contain carbon as the main component are targeted. The adsorbent 2 has a large number of pores, and organic substances and microorganisms contained in the raw water 11 are adsorbed and removed on the pores and the surface.

  Moreover, the microorganisms adhering to the surface of the adsorbent 2 grow by taking in organic substances contained in the raw water 11 as nutrients. For this reason, the organic matter contained in the raw water 11 is not only simply adsorbed by the adsorbent 2, but also removed from the raw water 11 by the action of metabolism by microorganisms.

  As described above, the adsorption treatment facility 1 generates the organic matter-reduced raw water 12 in which the organic matter is reduced from the raw water 11 by the physicochemical adsorption action and the biological metabolic action, and the subsequent semipermeable membrane treatment equipment 3. To supply. As a result, the organic matter-reduced raw water 12 with reduced organic matter is supplied to the semipermeable membrane treatment equipment 3, so that biofouling is prevented from occurring on the membrane surface of the reverse osmosis membrane, and as a result, the fresh water 13 is efficiently used. You can get well.

  However, since the adsorbent 2 has a limit in the amount of adsorption and the amount of microorganisms adhering to the surface, if the adsorption treatment facility 1 is continuously used, the adsorbent 2 becomes closer to the saturated adsorption amount of the adsorbent 2. As a result, the organic matter in the organic matter reducing raw water 12 supplied to the semipermeable membrane treatment equipment 3 cannot be sufficiently reduced, and the microorganisms and their products have grown on the surface of the adsorbent 2. The organic matter flows into the semipermeable membrane treatment equipment 3 at the subsequent stage.

<Regeneration system for adsorption processing equipment>
Therefore, the desalination system shown in FIG. 1 includes a regeneration system for the adsorption treatment facility 1 that removes organic substances and microorganisms attached to the surface of the adsorbent 2 of the adsorption treatment facility 1 and restores the adsorption ability of the adsorbent 2. Is provided.
The regeneration system for the adsorption treatment facility 1 includes a high temperature gas injection facility 21 and a high temperature gas inlet 22 for injecting the high temperature gas 23 into the adsorption treatment facility 1, and a fresh water tank 31 for injecting fresh water 37 into the adsorption treatment facility 1. , A fresh water heating facility 32, a fresh water injection facility 33, a salt concentration measuring facility 34, and a control unit 41.

<High-temperature gas injection mechanism>
As described above, the high-temperature gas injection facility 21 and the high-temperature gas injection port 22 are provided as a mechanism for injecting the high-temperature gas 23 into the adsorption treatment facility 1 and removing organic substances and microorganisms attached to the adsorbent 2.
The high temperature gas 23 is introduced from the high temperature gas injection facility 21 to the high temperature gas injection port 22 provided in the adsorption processing facility 1, and is injected into the inside of the adsorption processing facility 1 from the high temperature gas injection port 22. . And it is discharge | released outside as the exhaust gas 24 from the adsorption processing equipment 1. FIG.

  Here, the organic substances and microorganisms (including the death of microorganisms) to be removed from the adsorbent 2 are all organic substances, mainly composed of hydrogen and carbon, and contain a lot of moisture. For this reason, when the high-temperature gas 23 containing oxygen is injected into the adsorption treatment facility 1, the moisture is heated to become water vapor, and the organic matter (including microorganisms) undergoes an oxidation reaction to become water vapor and carbon dioxide. The water vapor and carbon dioxide are released to the outside from the adsorption treatment facility 1 together with the exhaust gas 24 as gas, thereby removing organic substances and microorganisms from the adsorbent 2 and restoring the adsorption capacity of the adsorbent 2. It becomes possible.

  Thus, the regeneration system for the adsorption processing facility 1 according to the first embodiment removes organic substances and microorganisms from the adsorbent 2 by injecting the high-temperature gas 23 containing oxygen into the adsorption processing facility 1, and adsorbent 2. Since it is possible to restore the adsorption capacity of the adsorbent, there is no need for chemicals (for example, caustic soda or sodium hypochlorite) when washing the adsorbent 2, and there is no need for waste liquid treatment, backwashing The merit that the waste water containing the organic substance of high concentration at the time is not generated, and the merit that the organic substance adsorbed inside the pores of the adsorbent 2 that is difficult to remove by general backflow cleaning or air bubble cleaning can be obtained.

Here, the high-temperature gas 23 is not limited, as long as it is a high-temperature gas and contains oxygen. The temperature of the high-temperature gas 23 is desirably at least several hundred degrees Celsius because organic substances (including microorganisms) need to react with oxygen to become carbon dioxide.
For example, when a power generation system (for example, a gas turbine power generation system (not shown)) is added to the desalination system, the high temperature gas injection facility 21 desirably uses the high temperature exhaust gas of the power generation system (not shown) as the high temperature gas 23. For example, an exhaust gas from a gas turbine is suitable because it has an oxygen concentration of about 15% and a temperature of 400 ° C. to 500 ° C.
Further, if the desalination system is not provided with a power generation system, the high-temperature gas 23 may be manufactured by providing a separate combustion facility or heating facility as the high-temperature gas injection facility 21.

  Further, as the adsorbent 2, if it is an inorganic adsorbent (for example, zeolite, ceramic, filter sand, etc.), even if the high temperature gas 23 is injected, it will not be reduced or disappeared by combustion, The adsorbent 2 can be used repeatedly after the regeneration.

Desirably, there are a plurality of high temperature gas injection ports 22 for injecting the high temperature gas 23 from the high temperature gas injection facility 21 into the adsorption treatment facility 1 instead of one.
This is because the non-uniformity of the oxidation effect by the high temperature gas 23 is suppressed. When the particulate adsorbent 2 is filled in the adsorption treatment facility 1, the injected high-temperature gas 23 tends to flow through a path with a low pressure loss. For this reason, in the path with low pressure loss, moisture evaporates quickly and organic substances and microorganisms are removed, and the pressure loss is further reduced (resistance to the high temperature gas 23 is lowered). On the contrary, the removal (oxidation treatment) of organic substances and microorganisms adhering to the adsorbent 2 at a location far from the path is difficult to proceed.
On the other hand, when a plurality of high-temperature gas injection ports 22 are provided, there are a plurality of paths through which the high-temperature gas 23 flows. Therefore, the surfaces of the adsorbent 2 are adhered to the surface, gaps, and pores more uniformly. Organic substances and microorganisms can be removed (oxidation treatment). In addition, when the hot gas inlet 22 is branched from one pipe, the flow rate of the hot gas 23 can be dealt with by switching the valve opening and the flow path over time so that the flow rate of the hot gas 23 is not biased to a specific pipe. Is desirable.

<Fresh water injection mechanism>
As a mechanism for injecting fresh water 37 into the adsorption treatment facility 1 and removing salt before injecting the high temperature gas 23 into the adsorption treatment facility 1 to remove organic substances and microorganisms adhering to the adsorbent 2, a fresh water tank 31; A fresh water heating facility 32, a fresh water injection facility 33, and a salt concentration measurement facility 34 are provided.

Fresh water 13 obtained by the semipermeable membrane treatment equipment 3 (desalination system) is supplied to and stored in the fresh water tank 31. The fresh water 35 stored in the fresh water tank 31 is supplied to the fresh water heating facility 32.
The fresh water heating facility 32 warms the fresh water 35 supplied from the fresh water tank 31 and supplies the heated fresh water 36 to the fresh water injection facility 33.
The fresh water injection facility 33 injects the fresh water 36 supplied and heated from the fresh water heating facility 32 into the inside of the adsorption treatment facility 1 as the heated fresh water 37. And it is discharged | emitted from the adsorption processing equipment 1 to the exterior of the adsorption processing equipment 1 as the waste_water | drain 38. FIG.

The salt concentration measurement facility 34 can measure the salt concentration of the drainage 38 discharged from the adsorption treatment facility 1.
Specifically, the salt concentration measuring equipment 34 includes a conductivity meter that measures the conductivity of the drainage 38, and a map (not shown) showing the relationship between the salt concentration and the conductivity based on the measured conductivity. ) To calculate the salt concentration. In addition to this, by further providing a thermometer for measuring the water temperature of the drainage 38, by calculating the salt concentration from a map (not shown) showing the relationship between the salt concentration corrected by the temperature and the conductivity, A more accurate measurement value can be obtained.
And the waste water 38 discharged | emitted from the adsorption processing equipment 1 is discharged | emitted outside the desalination system as the waste_water | drain 39. FIG.

  Here, before the organic matter and microorganisms adhering to the adsorbent 2 are removed by injecting the high temperature gas 23 into the adsorption treatment facility 1, first, the raw water 11 filled in the adsorption treatment facility 1 is discharged. For example, it is naturally discharged or forcibly discharged through a drain or drainage pipe (not shown) provided at the bottom of the adsorption treatment facility 1.

  However, even if it is attempted to discharge the raw water 11 through the drain or drainage pipe, it is unavoidable that some raw water 11 remains on the surface, gaps, and pores of the adsorbent 2 in the adsorption treatment facility 1 due to surface tension. Absent. If the high temperature gas 23 is supplied in this state, the salt content in the raw water 11 is precipitated as crystals before the organic matter and microorganisms are oxidized, and there is a possibility that the oxidation of the organic matter and microorganisms below the organic water and microorganisms may be inhibited.

  Moreover, the microorganisms adhering to the surface or gap of the adsorbent 2 contain salt and moisture in the body. For this reason, when the high temperature gas 23 is supplied to the adsorption treatment facility 1, the salt in the microorganisms precipitates as crystals before the organic matter is oxidized and inhibits the oxidation. The high temperature gas 23 supplied to vaporize moisture in the body. The amount of heat is deprived and energy efficiency is reduced.

  In response to such a problem, the regeneration system of the adsorption treatment facility 1 according to the first embodiment injects fresh water 37 from the fresh water injection facility 33 into the adsorption treatment facility 1, so that the surface, gap, and fineness of the adsorbent 2 are reduced. The raw water 11 remaining inside the hole is diluted and discharged from the adsorption treatment facility 1 together with the drainage 38. For this reason, it is desirable that the fresh water injection facility 33 supplies the fresh water 37 as uniformly as possible to the adsorbent 2 provided in the adsorption treatment facility 1.

In addition, the fresh water 37 not only wash away the raw water 11 adhering to the surface of the adsorbent 2, but also acts to rupture the cell membrane of the microorganisms adhering to the adsorbent 2 to cause the moisture and salt in the microorganisms to flow out of the body. To do.
Microorganisms take in and out the raw water 11 through a semipermeable membrane provided in at least a part of the body. However, when fresh water 37 is injected and the salt concentration outside the body suddenly changes, the osmotic pressure causes the body to enter the body. Water flows into the body and the microbial tissue ruptures. As a result, the salt in the body where the salt concentration is particularly high is discharged to the outside. Then, the water and salt that have flowed out of the body from the inside of the microorganism are diluted with the fresh water 37, washed away from the adsorbent 2, and discharged from the adsorption treatment facility 1 together with the drainage 38.

  Thus, the salt remaining in the inside of the adsorption treatment facility 1 (the salt due to the raw water 11 remaining on the surface of the adsorbent 2, etc., the salt in the microorganism) is preferably removed. And after salt content is removed, it becomes possible to efficiently remove organic substances and microorganisms adhering to the surface of the adsorbent 2 by injecting the high-temperature gas 23.

Moreover, the fresh water 36 and the fresh water 37 are heated by the fresh water heating equipment 32.
Since the raw water 11 remaining on the surface, gaps, and pores of the adsorbent 2 diffuses and dilutes faster as the temperature of the fresh water 37 is higher, salt can be removed from the adsorbent 2 more efficiently. It becomes. Moreover, since the viscosity coefficient also becomes small when the temperature of the fresh water 37 is high, the fresh water 37 can reach even a fine gap, and in this respect also, salt can be more efficiently removed from the adsorbent 2. In addition, the water temperature of the fresh water 37 is so desirable that it is high.

  Here, the freshwater heating facility 32 requires energy for heating. For example, when a power generation system (for example, a gas turbine power generation system (not shown)) is added to the desalination system, It is desirable to use the waste heat contained in the cooling waste water.

<Regeneration processing of adsorption processing equipment 1>
The control unit 41 can control the hot gas injection facility 21, the fresh water heating facility 32, and the fresh water injection facility 33. Further, the salinity concentration of the drainage 38 detected by the salt concentration measuring equipment 34 is input to the control unit 41.
The regeneration process of the arrival processing facility 1 executed by the control unit 41 will be described with reference to FIG. FIG. 2 is a flowchart for explaining the regeneration process of the adsorption processing facility 1.

In step S101, the control unit 41 determines whether or not to start the regeneration processing of the adsorption processing facility 1 (adsorbent 2). For example, when the regeneration process is started when a predetermined time has elapsed since the previous regeneration process, when the organic substance concentration or the microorganism concentration of the organic matter-reduced raw water 12 exceeds a predetermined threshold, or when the operator inputs the regeneration process. judge.
When it determines with not starting a reproduction | regeneration process (S101 * No), the control part 41 repeats the process of step S101. On the other hand, when it determines with starting a reproduction | regeneration process (S101 * Yes), the process of the control part 41 progresses to step S102.

  In step S102, after discharging the raw water 11 from the adsorption treatment facility 1, the control unit 41 controls the fresh water heating facility 32 and the fresh water injection facility 33 to inject the heated fresh water 37 into the adsorption treatment facility 1. .

In step S103, the control unit 41 determines whether or not the salt concentration of the waste water 38 measured by the salt concentration measuring facility 34 is equal to or less than a predetermined threshold value. Here, the threshold value is a threshold value for determining that the salt in the adsorption treatment facility 1 has been sufficiently discharged, and is a value stored in advance.
When the salt concentration of the wastewater 38 measured by the salt concentration measurement facility 34 is not less than or equal to a predetermined threshold (No at S103), the control unit 41 repeats the process of Step S103, and the fresh water 37 heated by the adsorption treatment facility 1 is obtained. Continue to inject. On the other hand, when the salt concentration of the wastewater 38 measured by the salt concentration measuring facility 34 is equal to or less than the predetermined threshold (S103 / Yes), the process of the control unit 41 proceeds to step S104.

  In step S <b> 104, the control unit 41 controls the fresh water heating facility 32 and the fresh water injection facility 33 to stop the injection of the fresh water 37 into the adsorption treatment facility 1.

  In step S <b> 105, the control unit 41 controls the high temperature gas injection equipment 21 to inject the high temperature gas 23 into the adsorption processing equipment 1.

In step S106, the control unit 41 determines whether or not a predetermined time (oxidation processing time) has elapsed since the injection of the high temperature gas 23 was started. Here, the oxidation treatment time is a threshold value for determining that organic substances and microorganisms in the adsorption treatment facility 1 have been sufficiently discharged by the oxidation treatment, and is a value stored in advance.
When the predetermined time (oxidation treatment time) has not elapsed (No in S106), the control unit 41 repeats the process of Step S106 and continues to inject the high temperature gas 23 into the adsorption treatment facility 1. On the other hand, when the predetermined time (oxidation treatment time) has elapsed (S106, Yes), the processing of the control unit 41 proceeds to step S107.

  In step S107, the control unit 41 controls the hot gas injection facility 21 to stop the injection of the high temperature gas 23 into the adsorption processing facility 1.

  As described above, since the hot gas 23 can be injected after the fresh water 37 is injected into the adsorption treatment facility 1 and the salt in the adsorption treatment facility 1 is discharged, the salt precipitation is suppressed and the adsorbent 2 is adhered. Organic substances and microorganisms can be efficiently oxidized to improve the regeneration efficiency of the adsorption treatment facility 1 (adsorbent 2).

Moreover, the saltwater is contained in the waste water 38 after supplying the fresh water 37 to the adsorption treatment equipment 1 and removing the salt in the adsorption treatment equipment 1, and the density | concentration falls with time.
As shown in step S103, whether the concentration of salt contained in the waste water 38 of the adsorption treatment facility 1 is measured by the salt concentration measurement facility 34, and the injection of fresh water 37 into the adsorption treatment facility 1 is continued or stopped. In the state where the salinity concentration contained in the waste water 38 is still high, that is, in the state where the salinity remains in the adsorption treatment facility 1, the injection of the fresh water 37 into the adsorption treatment facility 1 is stopped, and the high temperature By supplying the gas 23, it is possible to prevent the salt from being precipitated and the efficiency of the oxidation treatment from being lowered. Moreover, when the salt concentration contained in the waste water 38 becomes less than the threshold value, that is, in a state where the salt content in the adsorption treatment facility 1 is sufficiently discharged, the injection of the fresh water 37 into the adsorption treatment facility 1 may be stopped. Therefore, it is possible to prevent a large amount of fresh water in the fresh water tank 31 from being consumed.
In this way, by measuring the concentration of salt contained in the waste water 38 with the salt concentration measuring equipment 34, it is possible to perform an appropriate salt removal operation, taking into account both the consumption of fresh water and the oxidation operation with high-temperature gas. Operation can be realized.

<< Second Embodiment >>
Next, the desalination system provided with the reproduction | regeneration system of the adsorption processing equipment which concerns on 2nd Embodiment is demonstrated using FIG. Drawing 3 is a lineblock diagram of a desalination system provided with a regeneration system of adsorption treatment equipment concerning a 2nd embodiment.

  In the second embodiment (see FIG. 3), as compared with the first embodiment (see FIG. 1), the adsorption processing equipment 1 into which the fresh water 37 and the high-temperature gas 23 are injected is adsorbed in which the fresh water 37 is injected. In addition to the treatment facility 1 </ b> A, an adsorbent regeneration facility 52 into which the high-temperature gas 23 is injected and an adsorbent moving facility 51 that moves the adsorbent 2 between the adsorption treatment facility 1 </ b> A and the adsorbent regeneration facility 52 are provided. Is different.

For this reason, in the regeneration process of the adsorption treatment facility 1A according to the second embodiment (see FIG. 3), fresh water 37 is injected into the adsorption treatment facility 1A, and the raw water 11 and microbial salt adhering to the adsorbent 2 are discharged. After that, the adsorbent 2 is moved from the adsorption processing facility 1 </ b> A to the adsorbent regeneration facility 52 by the adsorbent moving facility 51.
And the high temperature gas 23 is inject | poured into the adsorbent reproduction | regeneration apparatus 52, the organic substance and microorganisms which adhered to the adsorbent 2 are oxidized, and the adsorbent 2 is regenerated. The regenerated adsorbent is moved from the adsorbent regeneration facility 52 to the adsorption treatment facility 1A by the adsorbent moving facility 51, and the regeneration process is completed.

  In the first embodiment (see FIG. 1), the adsorption treatment facility 1 is preferably a sealed tank-type container in order to inject the hot gas 23. On the other hand, according to such a configuration, the high-temperature gas 23 is injected into the adsorbent 2 even when the adsorption treatment facility 1A is not a sealed tank type but a tank type with an open top. Thus, the adsorbent 2 can be regenerated.

  Further, unlike the adsorption treatment facility 1, the adsorbent regeneration facility 52 is a facility specialized for the regeneration of the adsorbent 2, so it is desirable that the adsorbent regeneration facility 52 be a sealable container.

  Thus, by separately providing the adsorbent regeneration facility 52, it is not necessary to regenerate the entire adsorbent 2 at once, and for example, it is possible to regenerate it in portions, so the adsorbent regeneration facility 52 It is possible to reduce the scale of the initial investment, and to suppress the cost of the required initial investment.

«Third embodiment»
Next, the desalination system provided with the regeneration system for the adsorption treatment facility according to the third embodiment will be described with reference to FIG. Drawing 4 is a lineblock diagram of a desalination system provided with a regeneration system of adsorption treatment equipment concerning a 3rd embodiment.

  Compared to the first embodiment (see FIG. 1), the third embodiment (see FIG. 4) includes an adsorption treatment facility 1B instead of the adsorption treatment facility 1 into which the fresh water 37 and the high-temperature gas 23 are injected. And an adsorbent regeneration facility 53 into which the fresh water 37 and the high-temperature gas 23 are injected, and an adsorbent moving facility 51 that moves the adsorbent 2 between the adsorption processing facility 1B and the adsorbent regeneration facility 53. Is different.

For this reason, in the regeneration process of the adsorption processing facility 1B according to the third embodiment (see FIG. 4), the adsorbent 2 is moved from the adsorption treatment facility 1B to the adsorbent regeneration facility 53 by the adsorbent moving facility 51, and the adsorbent is recovered. Fresh water 37 is injected into the regenerating facility 53 to discharge the raw water 11 and microbial salt adhering to the adsorbent 2.
And the high temperature gas 23 is inject | poured into the adsorbent reproduction | regeneration apparatus 53, the organic substance and microorganisms which adhered to the adsorbent 2 are oxidized, and the adsorbent 2 is regenerated. The regenerated adsorbent is moved from the adsorbent regeneration facility 53 to the adsorption treatment facility 1B by the adsorbent moving facility 51, and the regeneration process is completed.

  In the first embodiment (see FIG. 1), the adsorption treatment facility 1 is preferably a sealed tank-type container in order to inject the hot gas 23. On the other hand, according to such a configuration, the high temperature gas 23 is injected into the adsorbent 2 even when the adsorption processing facility 1B is not a sealed tank type but a water tank type with an open top. Thus, the adsorbent 2 can be regenerated.

  Further, unlike the adsorption treatment facility 1, the adsorbent regeneration facility 53 is a facility specialized for the regeneration of the adsorbent 2, so it is desirable that the adsorbent regeneration facility 53 be a sealed container that does not cause the above-described problems.

  In this way, by separately providing the adsorbent regeneration facility 53, it is not necessary to regenerate the entire adsorbent 2 at once, and for example, it is possible to regenerate it in portions, so the adsorbent regeneration facility 53 It is possible to reduce the scale of the initial investment, and to suppress the cost of the required initial investment.

≪Modification≫
The regeneration system for the adsorption processing facility according to the present embodiment is not limited to the configuration of the above-described embodiment, and various modifications can be made without departing from the spirit of the invention.

When removing the salt content of the adsorbent 2, the fresh water injection facility 33 is described as supplying fresh water 37 continuously to the adsorption treatment facility 1 (adsorption treatment facility 1A, adsorbent regeneration facility 53) and discharging it as drainage 38. However, it is not limited to this.
For example, fresh water 37 is supplied from the fresh water injection facility 33 to the adsorption treatment facility 1 (adsorption treatment facility 1A, adsorbent regeneration facility 53) in a state in which a drain valve (not shown) of the discharge path for discharging the waste water 38 is closed. Then, after the fresh water 37 is stored in the adsorption treatment facility 1 (adsorption treatment facility 1A, adsorbent regeneration facility 53), the water injection from the fresh water injection facility 33 is stopped. And the structure which opens a drain valve (not shown) and discharges the waste_water | drain 38 from adsorption processing equipment 1 (adsorption processing equipment 1A, adsorbent regeneration equipment 53) may be sufficient. Further, these operations may be combined.

Moreover, although demonstrated as what inject | pours the fresh water 36 heated by the fresh water heating equipment 32 from the fresh water injection equipment 33 into the adsorption treatment equipment 1 (adsorption treatment equipment 1A, the adsorbent regeneration equipment 53) as the fresh water 37, It is not limited.
For example, the structure which supplies the fresh water 36 and 37 as water vapor | steam may be sufficient. Fresh water 37 injected into the adsorption treatment facility 1 (adsorption treatment facility 1A, adsorbent regeneration facility 53) as water vapor condenses on the surface of the adsorbent 2 to become liquid water. Compared with the case where fresh water 37 is supplied as a liquid with such a configuration, fresh water 37 can be supplied to a fine gap in the adsorbent 2, and salt can be efficiently removed from the adsorbent 2.

1, 1A, 1B Adsorption treatment equipment 2 Adsorbent 3 Semipermeable membrane treatment equipment (membrane treatment equipment)
11 Raw water 12 Organic matter-reduced raw water 13 Fresh water 14 Concentrated drainage 21 High-temperature gas injection equipment (high-temperature gas injection means)
22 High temperature gas inlet 23 High temperature gas 24 Exhaust gas 31 Fresh water tank 32 Fresh water heating equipment (fresh water heating means)
33 Fresh water injection equipment (fresh water injection means)
34 Salt concentration measuring equipment (salt concentration measuring means)
35, 36, 37 Fresh water 38, 39 Drain 41 Control section (control means)
51 Adsorbent transfer equipment (adsorbent transfer means)
52 Adsorbent regeneration equipment (adsorbent regeneration means)
53 Adsorbent regeneration equipment (Adsorbent regeneration means)

Claims (8)

An adsorption treatment facility having an adsorbent that removes organic matter from raw water containing salts used in a desalination system;
Fresh water injection means for injecting fresh water into the adsorption treatment facility to remove salts from the surface of the adsorbent;
A regeneration system for an adsorption treatment facility, comprising: high-temperature gas injection means for injecting a high-temperature gas containing oxygen into the adsorption treatment facility to oxidize organic substances adhering to the adsorbent. The regeneration system for an adsorption treatment facility according to claim 1, further comprising a fresh water heating means for raising a temperature of fresh water injected by the fresh water injection means. Salt concentration measuring means for measuring the salt concentration of the wastewater discharged from the adsorption treatment facility;
Control means for controlling the fresh water injection means and the hot gas injection means,
The control means includes
When the salt concentration of the wastewater measured by the salt concentration measuring means is below a predetermined threshold,
Stopping the injection of the fresh water by the fresh water injection means,
The regeneration system for an adsorption processing facility according to claim 1 or 2, wherein injection of the high temperature gas by the high temperature gas injection means is started. The regeneration system for an adsorption treatment facility according to any one of claims 1 to 3, wherein the adsorption treatment facility includes a plurality of hot gas inlets. An adsorption treatment facility having an adsorbent that removes organic matter from raw water containing salts used in a desalination system;
Fresh water injection means for injecting fresh water into the adsorption treatment facility to remove salts from the surface of the adsorbent;
An adsorbent moving means for taking out the adsorbent from the adsorption treatment facility;
An adsorbent regeneration means in which the adsorbent taken out by the adsorbent moving means is disposed;
A regeneration system for an adsorption treatment facility, comprising: a high-temperature gas injection means for injecting a high-temperature gas containing oxygen into the adsorbent regeneration means to oxidize organic substances adhering to the adsorbent. An adsorption treatment facility having an adsorbent that removes organic matter from raw water containing salts used in a desalination system;
An adsorbent moving means for taking out the adsorbent from the adsorption treatment facility;
An adsorbent regeneration means in which the adsorbent taken out by the adsorbent moving means is disposed;
Fresh water injection means for injecting fresh water into the adsorbent regeneration means to remove salts from the surface of the adsorbent;
A regeneration system for an adsorption treatment facility, comprising: a high-temperature gas injection means for injecting a high-temperature gas containing oxygen into the adsorbent regeneration means to oxidize organic substances adhering to the adsorbent. A method for regenerating an adsorption treatment facility having an adsorbent that removes organic substances from raw water containing salts supplied to a desalination system,
Injecting fresh water to remove salts from the surface of the adsorbent;
Injecting a high-temperature gas containing oxygen to oxidize organic substances adhering to the adsorbent, and regenerating the adsorption processing equipment. A desalination system comprising the regeneration system for an adsorption treatment facility according to any one of claims 1 to 6.

Images