JP4208768B2 - Method and apparatus for treating boric acid-containing waste liquid - Google Patents

Method and apparatus for treating boric acid-containing waste liquid Download PDF

Info

Publication number
JP4208768B2
JP4208768B2 JP2004168957A JP2004168957A JP4208768B2 JP 4208768 B2 JP4208768 B2 JP 4208768B2 JP 2004168957 A JP2004168957 A JP 2004168957A JP 2004168957 A JP2004168957 A JP 2004168957A JP 4208768 B2 JP4208768 B2 JP 4208768B2
Authority
JP
Japan
Prior art keywords
waste liquid
boric acid
containing waste
tank
supply tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2004168957A
Other languages
Japanese (ja)
Other versions
JP2005345440A (en
Inventor
英睦 永山
勝 西久保
龍明 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP2004168957A priority Critical patent/JP4208768B2/en
Publication of JP2005345440A publication Critical patent/JP2005345440A/en
Application granted granted Critical
Publication of JP4208768B2 publication Critical patent/JP4208768B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Removal Of Specific Substances (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Description

本発明は、加圧水型原子炉(PWR)等において発生するホウ酸含有廃液の処理方法及び処理装置に関する。   The present invention relates to a method and apparatus for treating boric acid-containing waste liquid generated in a pressurized water reactor (PWR) or the like.

加圧水型原子炉(PWR)等において発生するホウ酸含有廃液は、放射性核種を含むホウ酸が含まれているため、最終的にはセメントなどで固化する必要がある。しかしながら、ホウ酸はセメントの固化を妨害するため、セメント中へ添加できるホウ酸量には限界がある。このため、ホウ酸含有廃液中に予め水酸化カルシウム等のカルシウム化合物を添加してホウ酸を不溶化しホウ酸カルシウムを析出させる前処理を行い、この析出物を乾燥させて粉体化し、セメント固化することにより、ホウ酸によるセメント固化の妨害作用を回避する方法が知られている。   Since the boric acid-containing waste liquid generated in a pressurized water reactor (PWR) or the like contains boric acid containing a radionuclide, it must finally be solidified with cement or the like. However, since boric acid prevents the cement from solidifying, there is a limit to the amount of boric acid that can be added to the cement. For this reason, a calcium compound such as calcium hydroxide is added in advance to the boric acid-containing waste liquid to make boric acid insoluble and to precipitate calcium borate. The precipitate is dried and pulverized to solidify the cement. Thus, a method for avoiding the hindering effect of cement solidification by boric acid is known.

しかしながら、上記の方法では、ホウ酸含有廃液の粘度が上昇し、配管内の滞留部などにホウ酸カルシウムが沈降、堆積して配管が閉塞してまうという課題があった。このため、80℃に加熱したホウ酸含有廃液に、アルカリ金属元素化合物とアルカリ土類金属元素化合物とを添加し、この廃液を析出温度以上に保ちつつ配管内を通流させて乾燥機に供給し、乾燥処理することによって、配管内の滞留部への沈降等を抑制する方法が提案されている(例えば、特許文献1参照)。
特開2000−284092号公報(第11−12頁)
However, the above-described method has a problem that the viscosity of the boric acid-containing waste liquid increases, and calcium borate settles and accumulates in a staying portion or the like in the pipe and the pipe is blocked. For this reason, an alkali metal element compound and an alkaline earth metal element compound are added to a boric acid-containing waste liquid heated to 80 ° C., and the waste liquid is allowed to flow through the piping while being kept at a temperature equal to or higher than the precipitation temperature, and supplied to the dryer. And the method of suppressing sedimentation etc. to the residence part in piping is proposed by carrying out a drying process (for example, refer patent document 1).
JP 2000-284092 A (pages 11-12)

上述した改良された背景技術においても、ホウ酸含有廃液にアルカリ金属元素化合物とアルカリ土類金属元素化合物とを添加することによって廃液の粘度が上昇し、配管内の滞留部への沈降、堆積する可能性があるため、配管が閉塞してしまうという課題は以前としてあった。   Also in the improved background art described above, the viscosity of the waste liquid is increased by adding the alkali metal element compound and the alkaline earth metal element compound to the boric acid-containing waste liquid, and sedimentation and accumulation in the staying portion in the pipe are performed. Because of the possibility, there has been a problem that the pipe is blocked.

本発明は、かかる従来の事情に対処してなされたもので、ホウ酸含有廃液の粘度の上昇を抑制することができ、配管の閉塞などが生じることなく、安定してホウ酸含有廃液を処理することのできるホウ酸含有廃液の処理方法及び処理装置を提供しようとするものである。   The present invention has been made in response to such a conventional situation, can suppress an increase in the viscosity of the boric acid-containing waste liquid, and stably treats the boric acid-containing waste liquid without causing clogging of piping. An object of the present invention is to provide a boric acid-containing waste liquid treatment method and treatment apparatus that can be used.

本発明のホウ酸含有廃液の処理方法は、セメント固化するホウ酸含有廃液を処理する方法であって、前記ホウ酸含有廃液にアルカリ金属元素化合物を添加する工程と、前記ホウ酸含有廃液の温度を85℃より高い所定温度に昇温し、アルカリ土類金属化合物を添加して撹拌する工程とを具備したことを特徴とする。   The method for treating a boric acid-containing waste liquid according to the present invention is a method for treating a boric acid-containing waste liquid that is solidified into a cement, the step of adding an alkali metal element compound to the boric acid-containing waste liquid, and the temperature of the boric acid-containing waste liquid And heating the mixture to a predetermined temperature higher than 85 ° C., adding an alkaline earth metal compound, and stirring.

また、本発明のホウ酸含有廃液の処理装置は、ホウ酸含有廃液を収容する廃液供給タンクと、前記ホウ酸含有廃液を乾燥する乾燥処理装置と、前記廃液供給タンクから前記乾燥処理装置に前記ホウ酸含有廃液を定量移送する移送機構と、を具備しセメント固化する前記ホウ酸含有廃液を処理する装置であって、前記廃液供給タンク内にアルカリ金属元素化合物を添加する装置と、前記廃液供給タンク内にアルカリ土類金属元素化合物を添加する装置と、前記廃液供給タンク内の前記ホウ酸含有廃液の温度を85℃より高い所定温度に昇温する加熱機構と、前記廃液タンク内の前記ホウ酸含有廃液を撹拌する撹拌機構と、を具備したことを特徴とする。   The boric acid-containing waste liquid treatment apparatus of the present invention includes a waste liquid supply tank that contains boric acid-containing waste liquid, a drying treatment apparatus that dries the boric acid-containing waste liquid, and the waste liquid supply tank to the drying treatment apparatus. A transport mechanism for quantitatively transporting the boric acid-containing waste liquid, and an apparatus for processing the boric acid-containing waste liquid to solidify the cement, the apparatus for adding an alkali metal element compound in the waste liquid supply tank, and the waste liquid supply An apparatus for adding an alkaline earth metal element compound in the tank, a heating mechanism for raising the temperature of the boric acid-containing waste liquid in the waste liquid supply tank to a predetermined temperature higher than 85 ° C., and the boron in the waste liquid tank. And a stirring mechanism for stirring the acid-containing waste liquid.

また、本発明の他のホウ酸含有廃液の処理装置は、ホウ酸含有廃液を収容する廃液供給タンクと、前記ホウ酸含有廃液を乾燥する乾燥処理装置と、前記廃液供給タンクから前記乾燥処理装置に前記ホウ酸含有廃液を定量移送する移送機構と、を具備しセメント固化する前記ホウ酸含有廃液を処理する装置であって、前記廃液供給タンクに供給する前記ホウ酸含有廃液を前処理するための前処理タンクと、前記前処理タンク内にアルカリ金属元素化合物を添加する装置と、前記前処理タンク内にアルカリ土類金属元素化合物を添加する装置と、前記前処理タンク内の前記ホウ酸含有廃液の温度を85℃より高い所定温度に昇温する加熱機構と、前記前処理タンク内の前記ホウ酸含有廃液を撹拌する撹拌機構と、を具備したことを特徴とする。   In addition, another boric acid-containing waste liquid treatment apparatus according to the present invention includes a waste liquid supply tank that contains a boric acid-containing waste liquid, a drying treatment apparatus that dries the boric acid-containing waste liquid, and the drying treatment apparatus from the waste liquid supply tank. A device for processing the boric acid-containing waste liquid to be supplied to the waste liquid supply tank. A pretreatment tank, an apparatus for adding an alkali metal element compound in the pretreatment tank, an apparatus for adding an alkaline earth metal element compound in the pretreatment tank, and the boric acid content in the pretreatment tank A heating mechanism for raising the temperature of the waste liquid to a predetermined temperature higher than 85 ° C. and a stirring mechanism for stirring the boric acid-containing waste liquid in the pretreatment tank are provided.

本発明によれば、ホウ酸含有廃液の粘度の上昇を抑制することができ、配管の閉塞などが生じることなく、安定してホウ酸含有廃液を処理することができる。   ADVANTAGE OF THE INVENTION According to this invention, the raise of the viscosity of a boric acid containing waste liquid can be suppressed, and the boric acid containing waste liquid can be processed stably, without the obstruction | occlusion of piping etc. arising.

以下、本発明のホウ酸含有廃液の処理方法及び処理装置の詳細を実施形態について図面を参照して説明する。   Hereinafter, embodiments of the boric acid-containing waste liquid treatment method and treatment apparatus of the present invention will be described in detail with reference to the drawings.

図1は、本発明のホウ酸含有廃液の処理方法の一実施形態の構成を示すフロー図である。同図に示すように、本実施形態に係るホウ酸含有廃液の処理方法では、原子力発電所等から発生するホウ酸が主成分で、放射性ホウ酸を含むホウ酸含有廃液(1)に、アルカリ金属元素化合物(例えばNaOH)(2)を適量添加して中和した後、85℃より高温(好ましくは88℃〜95℃、更に好ましくは略90℃)に加熱(3)し、この後、アルカリ土類金属元素化合物(例えばCa(OH)2 )(4)を適量添加して、所定時間(例えば3時間以上)一定撹拌(5)し、70℃以上の温度に降温する(6)。そしてこの後、乾燥処理(7)を行い、セメント固化(8)を行う。 FIG. 1 is a flowchart showing the configuration of an embodiment of the method for treating a boric acid-containing waste liquid of the present invention. As shown in the figure, in the method for treating boric acid-containing waste liquid according to the present embodiment, boric acid generated from a nuclear power plant or the like is a main component, and the boric acid-containing waste liquid (1) containing radioactive boric acid is alkalinized. After an appropriate amount of a metal element compound (for example, NaOH) (2) is added and neutralized, it is heated (3) to a temperature higher than 85 ° C. (preferably 88 ° C. to 95 ° C., more preferably about 90 ° C.). An appropriate amount of an alkaline earth metal element compound (for example, Ca (OH) 2 ) (4) is added, and the mixture is stirred for a predetermined time (for example, 3 hours or more) (5), and the temperature is lowered to 70 ° C. or more (6). And after this, a drying process (7) is performed and cement solidification (8) is performed.

なお、アルカリ金属元素化合物としては、例えば、ナトリウムの水酸化物、硫酸化物、硝酸化物、あるいは、カリウムの水酸化物、硫酸化物、硝酸化物などを使用することができる。このアルカリ金属元素化合物の添加量は、例えばNaOHの場合、好ましくは、Na/B(モル比)=0.3〜0.4である。   Examples of alkali metal element compounds that can be used include sodium hydroxide, sulfate, and nitrate, or potassium hydroxide, sulfate, and nitrate. In the case of NaOH, for example, the amount of the alkali metal element compound added is preferably Na / B (molar ratio) = 0.3 to 0.4.

また、アルカリ土類金属元素化合物としては、例えば、カルシウムの水酸化物、硫酸化物、硝酸化物、あるいは、マグネシウムの水酸化物、硫酸化物、硝酸化物などを使用することができる。このアルカリ土類金属元素化合物の添加量は、例えばCa(OH)2 の場合、好ましくは、Ca/B(モル比)=0.5〜0.7である。 In addition, as the alkaline earth metal element compound, for example, calcium hydroxide, sulfate, nitrate, magnesium hydroxide, sulfate, nitrate, or the like can be used. For example, in the case of Ca (OH) 2 , the added amount of the alkaline earth metal element compound is preferably Ca / B (molar ratio) = 0.5 to 0.7.

図2は、縦軸を粘度(mPa・s)、横軸を時間(h)として、上記実施形態における放射性ホウ酸含有廃液(1)の加熱(2)温度と、粘度の時間的な変化の関係を調べた結果を示すものである。なお、同図において、曲線Aは85℃、曲線Bは88℃、曲線Cは90℃、曲線Dは95℃の場合を示している。   In FIG. 2, the vertical axis represents the viscosity (mPa · s) and the horizontal axis represents the time (h). The result of investigating the relationship is shown. In the figure, curve A is 85 ° C, curve B is 88 ° C, curve C is 90 ° C, and curve D is 95 ° C.

同図の曲線Aに示すように、加熱温度が85℃の場合、一時的に粘度が30mPa・s以上に高くなるが、85℃より高い温度、例えば、曲線Bに示す加熱温度が88℃の場合、曲線Cに示す加熱温度が90℃の場合、曲線Dに示す加熱温度が95℃の場合のいずれも、粘度が30mPa・s以下に保たれる。このため、加熱温度は、85℃より高温、好ましくは88℃〜95℃、更に好ましくは略90℃とする。これによって、粘度が低い安定した状態で、放射性ホウ酸含有廃液(1)を乾燥処理(7)の工程に送ることができ、配管が閉塞してしまうような事態が生じることを防止することができる。なお、アルカリ土類金属元素化合物添加後の撹拌は、反応を促進しかつ粘度の上昇を抑制するために所定時間以上行うことが必要であり、3時間以上とすることが好ましい。   As shown in the curve A of the figure, when the heating temperature is 85 ° C., the viscosity is temporarily higher than 30 mPa · s, but the temperature is higher than 85 ° C., for example, the heating temperature shown in the curve B is 88 ° C. In this case, when the heating temperature indicated by the curve C is 90 ° C., the viscosity is maintained at 30 mPa · s or less in both cases where the heating temperature indicated by the curve D is 95 ° C. For this reason, heating temperature is higher than 85 degreeC, Preferably it is 88 to 95 degreeC, More preferably, you may be about 90 degreeC. As a result, the radioactive boric acid-containing waste liquid (1) can be sent to the drying process (7) in a stable state with a low viscosity, and it is possible to prevent the occurrence of a situation where the piping is blocked. it can. The stirring after addition of the alkaline earth metal element compound needs to be performed for a predetermined time or more in order to accelerate the reaction and suppress the increase in viscosity, and is preferably set to 3 hours or more.

図3は、上述したホウ酸含有廃液の処理方法を実施するためのホウ酸含有廃液の処理装置の一実施形態の構成を示すものである。同図に示すように、本実施形態に係るホウ酸含有廃液の処理装置は、濃縮廃液供給タンク11と、濃縮廃液供給ポンプ12及びヘッドタンク13などからなる移送機構と、乾燥処理装置(竪型薄膜乾燥機)14とを具備している。   FIG. 3 shows a configuration of an embodiment of a boric acid-containing waste liquid treatment apparatus for carrying out the above-described boric acid-containing waste liquid treatment method. As shown in the figure, the boric acid-containing waste liquid treatment apparatus according to this embodiment includes a concentrated waste liquid supply tank 11, a transfer mechanism including a concentrated waste liquid supply pump 12, a head tank 13, and the like, and a drying treatment apparatus (saddle type). Thin film dryer) 14.

また、濃縮廃液供給タンク11には、中和剤であるアルカリ金属元素化合物を添加するためのアルカリ金属元素化合物添加装置15と、アルカリ土類金属元素化合物を添加するための、添加物測定装置16aを有し添加量を制御するアルカリ土類金属元素化合物添加装置16が設けられている。さらに、濃縮廃液供給タンク11には、タンク中の液温を一定に保つ電気式加温機17と、液温を降温させるための冷却装置18、ベント冷却器19、タンク中の液位を測定するための液位計20、タンク中の液温を測定するための温度計21、タンク中の廃液を撹拌するための機械式撹拌機22が設けられている。なお、同図において23,24は流量計、25はレベル計、26は調整弁、27は洗浄ラインである。   Further, the concentrated waste liquid supply tank 11 has an alkali metal element compound adding device 15 for adding an alkali metal element compound as a neutralizing agent, and an additive measuring device 16a for adding an alkaline earth metal element compound. There is provided an alkaline earth metal element compound addition device 16 for controlling the addition amount. Furthermore, the concentrated waste liquid supply tank 11 measures the electric heater 17 for keeping the liquid temperature in the tank constant, the cooling device 18 for lowering the liquid temperature, the vent cooler 19, and the liquid level in the tank. A liquid level meter 20 for measuring the temperature, a thermometer 21 for measuring the temperature of the liquid in the tank, and a mechanical stirrer 22 for stirring the waste liquid in the tank are provided. In the figure, 23 and 24 are flow meters, 25 is a level meter, 26 is a regulating valve, and 27 is a cleaning line.

上記構成のホウ酸含有廃液の処理装置では、濃縮廃液供給タンク11にホウ酸含有濃縮廃液を収容し、アルカリ金属元素化合物添加装置15から例えばNaOHなどのアルカリ金属元素化合物を所定量添加して中和した後、電気式加温機17によってホウ酸含有濃縮廃液を85℃より高温(例えば90℃)に加熱する。そして、アルカリ土類金属元素化合物添加装置16から例えばCa(OH)2 などのアルカリ土類金属元素化合物を所定量添加し、機械式撹拌機23で一定時間(3時間以上)撹拌する。しかる後、冷却装置18によって、ホウ酸含有濃縮廃液を所定温度(例えば略70℃)に降温する。 In the boric acid-containing waste liquid treatment apparatus having the above-described configuration, the concentrated waste liquid supply tank 11 stores the boric acid-containing concentrated waste liquid, and a predetermined amount of an alkali metal element compound such as NaOH is added from the alkali metal element compound addition apparatus 15 to the inside. After the addition, the boric acid-containing concentrated waste liquid is heated to a temperature higher than 85 ° C. (for example, 90 ° C.) by the electric warmer 17. Then, a predetermined amount of an alkaline earth metal element compound such as Ca (OH) 2 is added from the alkaline earth metal element compound addition device 16 and stirred by the mechanical stirrer 23 for a predetermined time (3 hours or more). Thereafter, the boric acid-containing concentrated waste liquid is cooled to a predetermined temperature (for example, approximately 70 ° C.) by the cooling device 18.

上記のような処理(難溶化処理)を行うことにより、ホウ酸含有廃液の廃液性状を安定化することができ、粘度上昇を抑制することができる。そして、この粘度上昇幅が低いホウ酸含有濃縮廃液を、濃縮廃液供給ポンプ12及びヘッドタンク13などにより、乾燥処理装置14へ給液するので、配管が閉塞してしまうような事態が生じることを防止することができ、信頼性の向上を図ることができる。また、濃縮廃液供給タンク11で、前述したホウ酸含有濃縮廃液の難溶化処理を行うことができるので、構成機器が比較的少なく、占有スペースを少なくすることができる。   By performing the above treatment (slightly solubilizing treatment), the waste liquid properties of the boric acid-containing waste liquid can be stabilized, and an increase in viscosity can be suppressed. Then, since the concentrated waste liquid containing boric acid having a low viscosity increase width is supplied to the drying processing device 14 by the concentrated waste liquid supply pump 12 and the head tank 13 or the like, there is a situation in which the piping is blocked. Can be prevented, and reliability can be improved. In addition, since the above-described boric acid-containing concentrated waste liquid can be hardly solubilized in the concentrated waste liquid supply tank 11, the number of components is relatively small, and the occupied space can be reduced.

図4は、他の実施形態に係るホウ酸含有廃液の処理装置の構成を示すものであり、前述した実施形態に対応する部分には、同一の符号が付してある。同図に示す実施形態では、濃縮廃液供給タンク11を2系列備えており、一方の濃縮廃液供給タンク11でホウ酸含有濃縮廃液の難溶化処理工程を行っている間に、他方の濃縮廃液供給タンク11では既に難溶化処理を行ったホウ酸含有濃縮廃液の給液工程を行うことができ、これによって全体的な処理時間の短縮を図ることができる。また、一方の濃縮廃液供給タンク11のみを用いた処理も行うことができ、他方の濃縮廃液供給タンク11のメンテナンスを行う時などに有効である。   FIG. 4 shows a configuration of a boric acid-containing waste liquid treatment apparatus according to another embodiment, and parts corresponding to the above-described embodiments are denoted by the same reference numerals. In the embodiment shown in the figure, two concentrated waste liquid supply tanks 11 are provided. While one of the concentrated waste liquid supply tanks 11 performs the process of making the boric acid-containing concentrated waste liquid insoluble, the other concentrated waste liquid supply is performed. In the tank 11, it is possible to perform a boric acid-containing concentrated waste liquid supplying process that has already been subjected to a slightly solubilizing process, and thus the overall processing time can be shortened. In addition, processing using only one concentrated waste liquid supply tank 11 can be performed, which is effective when the other concentrated waste liquid supply tank 11 is maintained.

図5は、他の実施形態に係るホウ酸含有廃液の処理装置の構成を示すものであり、前述した実施形態に対応する部分には、同一の符号が付してある。同図に示す実施形態では、ヘッドタンクを介することなく、濃縮廃液供給タンク11から、濃縮廃液供給ポンプ12によって、直接乾燥処理装置14に難溶化処理したホウ酸含有濃縮廃液を給液するようになっている。このため粘度上昇する前に乾燥処理装置14における乾燥処理を行うことができる。   FIG. 5 shows a configuration of a boric acid-containing waste liquid treatment apparatus according to another embodiment, and portions corresponding to the above-described embodiments are denoted by the same reference numerals. In the embodiment shown in the drawing, the boric acid-containing concentrated waste liquid that has been hardly solubilized is supplied directly from the concentrated waste liquid supply tank 11 to the drying treatment apparatus 14 by the concentrated waste liquid supply pump 12 without using the head tank. It has become. For this reason, the drying process in the drying processing apparatus 14 can be performed before the viscosity increases.

なお、この場合、乾燥処理装置14を洗浄する乾燥機洗浄水を受け入れるための乾燥機洗浄水タンク30、乾燥機洗浄水ポンプ31などが設けられている。また、乾燥機洗浄水タンク30には、ヒータ32、温度計33、液位計34、機械式撹拌機35などが設けられている。   In this case, a dryer cleaning water tank 30 and a dryer cleaning water pump 31 for receiving the dryer cleaning water for cleaning the drying processing apparatus 14 are provided. The dryer washing water tank 30 is provided with a heater 32, a thermometer 33, a liquid level gauge 34, a mechanical stirrer 35, and the like.

図6は、他の実施形態に係るホウ酸含有廃液の処理装置の構成を示すものであり、前述した実施形態に対応する部分には、同一の符号が付してある。同図に示す実施形態では、濃縮廃液供給タンク11に、前処理タンク40を設け、さらに、この前処理タンク40に、アルカリ金属元素化合物添加装置15、アルカリ土類金属元素化合物添加装置16、電気式加温機17、冷却装置18、温度計42、機械式撹拌機43、液位計44などを設けたものである。なお、この場合、濃縮廃液供給タンク11には、保温装置41が設けられている。   FIG. 6 shows a configuration of a boric acid-containing waste liquid treatment apparatus according to another embodiment, and portions corresponding to the above-described embodiments are denoted by the same reference numerals. In the embodiment shown in the figure, a pretreatment tank 40 is provided in the concentrated waste liquid supply tank 11, and further, an alkali metal element compound addition device 15, an alkaline earth metal element compound addition device 16, A type warmer 17, a cooling device 18, a thermometer 42, a mechanical stirrer 43, a liquid level meter 44, and the like are provided. In this case, the concentrated waste liquid supply tank 11 is provided with a heat retaining device 41.

上記構成のホウ酸含有廃液の処理装置では、前処理タンク40と、濃縮廃液供給タンク11とを有するので、前処理(難溶化処理)工程と給液工程とをこれらによって同時に行うことができ、全体的な処理時間の短縮を図ることができる。   Since the boric acid-containing waste liquid treatment apparatus having the above-described configuration includes the pretreatment tank 40 and the concentrated waste liquid supply tank 11, the pretreatment (slightly soluble treatment) step and the liquid supply step can be simultaneously performed by these, The overall processing time can be shortened.

本発明のホウ酸含有廃液の処理方法の一実施形態の構成を示すフロー図。The flowchart which shows the structure of one Embodiment of the processing method of the boric-acid containing waste liquid of this invention. 本発明の一実施形態における廃液粘度の時間的な変化を示すグラフ。The graph which shows the time change of the waste liquid viscosity in one Embodiment of this invention. 本発明の一実施形態におけるホウ酸含有廃液の処理装置の構成を示す概略系統図。The schematic system diagram which shows the structure of the processing apparatus of the boric acid containing waste liquid in one Embodiment of this invention. 本発明の他の実施形態におけるホウ酸含有廃液の処理装置の構成を示す概略系統図。The schematic system diagram which shows the structure of the processing apparatus of the boric acid containing waste liquid in other embodiment of this invention. 本発明の他の実施形態におけるホウ酸含有廃液の処理装置の構成を示す概略系統図。The schematic system diagram which shows the structure of the processing apparatus of the boric acid containing waste liquid in other embodiment of this invention. 本発明の他の実施形態におけるホウ酸含有廃液の処理装置の構成を示す概略系統図。The schematic system diagram which shows the structure of the processing apparatus of the boric acid containing waste liquid in other embodiment of this invention.

符号の説明Explanation of symbols

11…濃縮廃液供給タンク、12…濃縮廃液供給ポンプ、13…ヘッドタンク、14…乾燥処理装置、15…アルカリ金属元素化合物添加装置、16…アルカリ土類金属元素化合物添加装置、17…電気式加温機、18…冷却装置、19…ベント冷却器、20…液位計、21…温度計、22…機械式撹拌機。   DESCRIPTION OF SYMBOLS 11 ... Concentrated waste liquid supply tank, 12 ... Concentrated waste liquid supply pump, 13 ... Head tank, 14 ... Drying processing apparatus, 15 ... Alkali metal element compound addition apparatus, 16 ... Alkaline earth metal element compound addition apparatus, 17 ... Electric addition Warm machine, 18 ... cooling device, 19 ... vent cooler, 20 ... liquid level meter, 21 ... thermometer, 22 ... mechanical stirrer.

Claims (12)

セメント固化するホウ酸含有廃液を処理する方法であって、
前記ホウ酸含有廃液にアルカリ金属元素化合物を添加する工程と、
前記ホウ酸含有廃液の温度を85℃より高い所定温度に昇温し、アルカリ土類金属化合物を添加して撹拌する工程と
を具備したことを特徴とするホウ酸含有廃液の処理方法。
A method for treating boric acid-containing waste liquid that solidifies into cement,
Adding an alkali metal element compound to the boric acid-containing waste liquid;
And a step of heating the boric acid-containing waste liquid to a predetermined temperature higher than 85 ° C., adding an alkaline earth metal compound, and stirring the boric acid-containing waste liquid.
前記撹拌を3時間以上行うことを特徴とする請求項1記載のホウ酸含有廃液の処理方法。   The boric acid-containing waste liquid treatment method according to claim 1, wherein the stirring is performed for 3 hours or more. 前記所定温度が88〜95℃であることを特徴とする請求項1又は2記載のホウ酸含有廃液の処理方法。   The said predetermined temperature is 88-95 degreeC, The processing method of the boric acid containing waste liquid of Claim 1 or 2 characterized by the above-mentioned. 前記所定温度に昇温した前記ホウ酸含有廃液の温度を、略70℃に降温する工程をさらに具備したことを特徴とする請求項1〜3のいずれか1項記載のホウ酸含有廃液の処理方法。   The treatment of boric acid-containing waste liquid according to any one of claims 1 to 3, further comprising a step of lowering the temperature of the boric acid-containing waste liquid heated to the predetermined temperature to about 70 ° C. Method. ホウ酸含有廃液を収容する廃液供給タンクと、前記ホウ酸含有廃液を乾燥する乾燥処理装置と、前記廃液供給タンクから前記乾燥処理装置に前記ホウ酸含有廃液を定量移送する移送機構と、を具備しセメント固化する前記ホウ酸含有廃液を処理する装置であって、
前記廃液供給タンク内にアルカリ金属元素化合物を添加する装置と、
前記廃液供給タンク内にアルカリ土類金属元素化合物を添加する装置と、
前記廃液供給タンク内の前記ホウ酸含有廃液の温度を85℃より高い所定温度に昇温する加熱機構と、
前記廃液タンク内の前記ホウ酸含有廃液を撹拌する撹拌機構と、
を具備したことを特徴とするホウ酸含有廃液の処理装置。
A waste liquid supply tank for storing boric acid-containing waste liquid; a drying processing apparatus for drying the boric acid-containing waste liquid; and a transfer mechanism for quantitatively transferring the boric acid-containing waste liquid from the waste liquid supply tank to the drying processing apparatus. An apparatus for treating the boric acid-containing waste liquid that solidifies and cements,
An apparatus for adding an alkali metal element compound into the waste liquid supply tank;
An apparatus for adding an alkaline earth metal element compound into the waste liquid supply tank;
A heating mechanism that raises the temperature of the boric acid-containing waste liquid in the waste liquid supply tank to a predetermined temperature higher than 85 ° C;
An agitation mechanism for agitating the boric acid-containing waste liquid in the waste liquid tank;
An apparatus for treating boric acid-containing waste liquid, comprising:
前記廃液供給タンク内の前記ホウ酸含有廃液の温度を略70℃に降温する冷却装置をさらに具備したことを特徴とする請求項5項載のホウ酸含有廃液の処理装置。   6. The apparatus for treating boric acid-containing waste liquid according to claim 5, further comprising a cooling device for lowering the temperature of the boric acid-containing waste liquid in the waste liquid supply tank to about 70 ° C. 前記廃液供給タンクを複数具備したことを特徴とする請求項5又は6記載のホウ酸含有廃液の処理装置。   The boric acid-containing waste liquid treatment apparatus according to claim 5 or 6, comprising a plurality of the waste liquid supply tanks. ホウ酸含有廃液を収容する廃液供給タンクと、前記ホウ酸含有廃液を乾燥する乾燥処理装置と、前記廃液供給タンクから前記乾燥処理装置に前記ホウ酸含有廃液を定量移送する移送機構と、を具備しセメント固化する前記ホウ酸含有廃液を処理する装置であって、
前記廃液供給タンクに供給する前記ホウ酸含有廃液を前処理するための前処理タンクと、
前記前処理タンク内にアルカリ金属元素化合物を添加する装置と、
前記前処理タンク内にアルカリ土類金属元素化合物を添加する装置と、
前記前処理タンク内の前記ホウ酸含有廃液の温度を85℃より高い所定温度に昇温する加熱機構と、
前記前処理タンク内の前記ホウ酸含有廃液を撹拌する撹拌機構と、
を具備したことを特徴とするホウ酸含有廃液の処理装置。
A waste liquid supply tank for storing boric acid-containing waste liquid; a drying processing apparatus for drying the boric acid-containing waste liquid; and a transfer mechanism for quantitatively transferring the boric acid-containing waste liquid from the waste liquid supply tank to the drying processing apparatus. An apparatus for treating the boric acid-containing waste liquid that solidifies and cements,
A pretreatment tank for pretreating the boric acid-containing waste liquid supplied to the waste liquid supply tank;
An apparatus for adding an alkali metal element compound into the pretreatment tank;
An apparatus for adding an alkaline earth metal element compound into the pretreatment tank;
A heating mechanism for raising the temperature of the boric acid-containing waste liquid in the pretreatment tank to a predetermined temperature higher than 85 ° C;
A stirring mechanism for stirring the boric acid-containing waste liquid in the pretreatment tank;
An apparatus for treating boric acid-containing waste liquid, comprising:
前記前処理タンク内の前記ホウ酸含有廃液の温度を略70℃に降温する冷却装置と、前記廃液供給タンク内の前記ホウ酸含有廃液の温度を略70℃に保持する保温装置とをさらに具備したことを特徴とする請求項8項記載のホウ酸含有廃液の処理装置。   A cooling device that lowers the temperature of the boric acid-containing waste liquid in the pretreatment tank to approximately 70 ° C., and a heat retention device that maintains the temperature of the boric acid-containing waste liquid in the waste liquid supply tank at approximately 70 ° C. The apparatus for treating a boric acid-containing waste liquid according to claim 8, wherein the boric acid-containing waste liquid is treated. 前記移送機構がヘッドタンクを具備したことを特徴とする請求項5〜9のいずれか1項記載のホウ酸含有廃液の処理装置。   The boric acid-containing waste liquid treatment apparatus according to claim 5, wherein the transfer mechanism includes a head tank. 前記移送機構が定量移送ポンプを具備したことを特徴とする請求項5〜9のいずれか1項記載のホウ酸含有廃液の処理装置。   10. The boric acid-containing waste liquid treatment apparatus according to claim 5, wherein the transfer mechanism includes a quantitative transfer pump. 前記加熱機構の前記所定温度が88〜95℃であることを特徴とする請求項5〜11のいずれか1項記載のホウ酸含有廃液の処理装置。   The said predetermined temperature of the said heating mechanism is 88-95 degreeC, The processing apparatus of the boric acid containing waste liquid of any one of Claims 5-11 characterized by the above-mentioned.
JP2004168957A 2004-06-07 2004-06-07 Method and apparatus for treating boric acid-containing waste liquid Expired - Lifetime JP4208768B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004168957A JP4208768B2 (en) 2004-06-07 2004-06-07 Method and apparatus for treating boric acid-containing waste liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004168957A JP4208768B2 (en) 2004-06-07 2004-06-07 Method and apparatus for treating boric acid-containing waste liquid

Publications (2)

Publication Number Publication Date
JP2005345440A JP2005345440A (en) 2005-12-15
JP4208768B2 true JP4208768B2 (en) 2009-01-14

Family

ID=35497948

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004168957A Expired - Lifetime JP4208768B2 (en) 2004-06-07 2004-06-07 Method and apparatus for treating boric acid-containing waste liquid

Country Status (1)

Country Link
JP (1) JP4208768B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5172493B2 (en) * 2008-06-23 2013-03-27 株式会社東芝 Method and apparatus for treating boric acid-containing waste liquid
JP5570865B2 (en) * 2010-04-23 2014-08-13 株式会社東芝 Method and apparatus for treating boric acid-containing waste liquid
JP5783536B2 (en) * 2012-03-29 2015-09-24 公益財団法人 塩事業センター Boron recovery method

Also Published As

Publication number Publication date
JP2005345440A (en) 2005-12-15

Similar Documents

Publication Publication Date Title
JP5172493B2 (en) Method and apparatus for treating boric acid-containing waste liquid
US3507801A (en) Entrapment of radioactive waste water using sodium borate
CN105989903B (en) Method for handling radioactive liquid waste
JP4208768B2 (en) Method and apparatus for treating boric acid-containing waste liquid
CN108352201B (en) Nuclear power plant and method for operating a nuclear power plant
CN105237425B (en) Mother liquor pretreatment and circulation utilization method in a kind of chain type complex of ferrous glycine synthesis
JP2008256660A (en) Radioactive waste burned ash solidification processing method
JP5649383B2 (en) Method and apparatus for treating boric acid-containing waste liquid
JP2006258716A (en) Radioactive waste solidification method and solidification device
JP6306864B2 (en) Method and equipment for adjusting pH of slag granulated water
JP4712018B2 (en) Solidification method of radioactive waste
CN115491681A (en) Chemical cleaning liquid and cleaning process for boiler under oxygen-adding working condition
CN103878029B (en) A kind of supplements-iron for complex iron desulphurization solution and preparation method thereof
JP5160215B2 (en) Method for treating sodium hydroxide waste solution of aluminum material
CN209098815U (en) Power station, thermal power plant, nuclear power station water supply adding sodium hydroxide intelligent precise Automatic Control match, integrative machine are administered
US1783478A (en) Method and means for removing scale from water jackets of internal combustion engines
US20060135801A1 (en) Continuous process for the neutralization of surfactant acid precursors
JPS6151758B2 (en)
JP5498326B2 (en) Method and apparatus for treating boric acid-containing waste liquid
JP2009109253A (en) Method and device for chemical decontamination
JPS6230269B2 (en)
CN104449562B (en) A kind of Boiler heating water anti-theft agent and preparation method thereof
JP5570865B2 (en) Method and apparatus for treating boric acid-containing waste liquid
JPH03251602A (en) Controlling method for water quality for steam converter
Sista Continuous hydrogen reduction of copper from its sulfate solution: kinetic study in a plug flow reactor.

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061023

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20080403

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20081014

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20081021

R151 Written notification of patent or utility model registration

Ref document number: 4208768

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R151

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111031

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111031

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121031

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131031

Year of fee payment: 5