JPH0143675Y2 - - Google Patents
Info
- Publication number
- JPH0143675Y2 JPH0143675Y2 JP5048683U JP5048683U JPH0143675Y2 JP H0143675 Y2 JPH0143675 Y2 JP H0143675Y2 JP 5048683 U JP5048683 U JP 5048683U JP 5048683 U JP5048683 U JP 5048683U JP H0143675 Y2 JPH0143675 Y2 JP H0143675Y2
- Authority
- JP
- Japan
- Prior art keywords
- evaporator
- suction head
- effective suction
- concentrate
- concentrate pump
- 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
Links
- 239000007788 liquid Substances 0.000 claims description 45
- 239000012141 concentrate Substances 0.000 claims description 38
- 239000002699 waste material Substances 0.000 claims description 13
- 238000001704 evaporation Methods 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000001771 impaired effect Effects 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000009833 condensation Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Description
【考案の詳細な説明】
本考案は例えば原子力発電所で使用される廃液
蒸発装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a waste liquid evaporator used, for example, in nuclear power plants.
一般に廃液蒸発装置は、濃縮液を収容する蒸発
器を備え、この蒸発器内の濃縮液を濃縮液ポンプ
により循環させ、その際加熱器を通過させる構成
となつており廃液を蒸発して濃縮し、その際発生
する蒸気をコンデンサ等に導入し擬縮水として若
使用あるいは排水する。上記蒸発器の水位・圧力
は運転状態により大きく変化し、それに伴ない上
記濃縮液ポンプを流通する濃縮液の温度も時間と
共に変化する為にいわゆるキヤビテーシヨンが発
生する恐れがある。このようなキヤビテーシヨン
が発生すると濃縮液ポンプが損傷する恐れがあり
好ましいことではなく、その為従来保護インタロ
ツク機構を設けてキヤビテーシヨン発生による損
傷を未然に防止することが行なわれていた。すな
わち濃縮液ポンプの必要有効吸込ヘツド（以後
NPSHreqと称す）を下回ることのないような圧
力を求めて、この圧力により上記保護インタロツ
クを作動させていた。 In general, a waste liquid evaporator is equipped with an evaporator that stores the concentrated liquid, and the concentrated liquid in the evaporator is circulated by a concentrated liquid pump, and at that time, it is passed through a heater, and the waste liquid is evaporated and concentrated. The steam generated at this time is introduced into a condenser, etc., and used as pseudo-condensation water or drained. The water level and pressure in the evaporator vary greatly depending on the operating conditions, and the temperature of the concentrated liquid flowing through the concentrated liquid pump also changes with time, so that so-called cavitation may occur. If such cavitation occurs, the concentrate pump may be damaged, which is not desirable. Therefore, conventionally, a protective interlock mechanism has been provided to prevent damage caused by cavitation. i.e. the required effective suction head of the concentrate pump (hereinafter
A pressure that does not fall below NPSHreq (referred to as NPSHreq) is determined, and this pressure is used to activate the protection interlock.
しかしながら運転状態が変化すると、蒸発器の
圧力および濃縮液の温度も変化する為にそれに合
せて設定する圧力を変更する必要があり、これを
行なう為には制御設備を大掛りなものとしなけれ
ばならず、そこで従来は濃縮液ポンプの運転を制
限することにより対処していた。 However, if the operating conditions change, the pressure of the evaporator and the temperature of the concentrated liquid will also change, so it is necessary to change the set pressure accordingly, and in order to do this, the control equipment must be large-scale. Conventionally, this problem was dealt with by restricting the operation of the concentrate pump.
このように従来の廃液蒸発装置においては、運
転状態が変化して例えば冷却運転状態を行なつた
場合には蒸発器の圧力および濃縮液の温度が大き
く変化し、その場合には濃縮液ポンプの運転を不
必要に制限しあるいは停止させなければならず、
装置としての安定した運転が損なわれる恐れがあ
つた。 As described above, in conventional waste liquid evaporators, when the operating state changes, for example, when the cooling operation is performed, the pressure of the evaporator and the temperature of the concentrate change significantly, and in that case, the concentrate pump Driving must be unnecessarily restricted or stopped;
There was a risk that the stable operation of the device would be impaired.
本考案は以上の点にもとづいてなされたもので
その目的とするところは、不必要な濃縮液ポンプ
の運転制限あるいは停止をなくし、装置としての
安定した運転を可能にする廃液蒸発装置を提供す
ることにある。 The present invention has been developed based on the above points, and its purpose is to provide a waste liquid evaporation device that eliminates unnecessary operational restrictions or stoppages of the concentrated liquid pump and enables stable operation of the device. There is a particular thing.
すなわち本考案による廃液蒸発装置は、蒸発器
と、この蒸発器内の濃縮液を加熱器を介して循環
させる濃縮液ポンプとを備えた廃液蒸発装置にお
いて、上記蒸発器の液位・圧力および循環する濃
縮液温度から有効吸込ヘツドを算出しあらかじめ
設定された上記濃縮液ポンプの必要有効吸込ヘツ
ドとを比較して算出した有効吸込ヘツドが必要有
効吸込ヘツドを下回つた時濃縮液ポンプを停止さ
せる運転制御装置を設けた構成である。 That is, the waste liquid evaporator according to the present invention is a waste liquid evaporator equipped with an evaporator and a concentrate pump that circulates the concentrated liquid in the evaporator via a heater. Calculate the effective suction head from the concentrated liquid temperature and compare it with the required effective suction head of the concentrated liquid pump set in advance, and stop the concentrated liquid pump when the calculated effective suction head falls below the required effective suction head. This configuration includes an operation control device.
したがつて、蒸発器の液位・圧力および循環す
る濃縮液温度からその運転状態における有効吸込
ヘツドを算出し、必要有効吸込ヘツドと比較して
いるので、必要有効吸込ヘツドを上回つている限
り濃縮液ポンプの運転を制限する必要はなく、従
来のように運転を制限したりあるいは停止させた
りすることはなくなり、装置として安定した運転
を行なうことができる。また算出した有効吸込ヘ
ツドが必要有効吸込ヘツドを下回つた場合には速
やかに濃縮液ポンプを停止させることができるの
で濃縮液ポンプを保護することが可能となりキヤ
ビテーシヨン発生による損傷等を未然に防止する
ことができる。 Therefore, the effective suction head under the operating conditions is calculated from the liquid level and pressure of the evaporator and the temperature of the circulating concentrated liquid, and compared with the required effective suction head, so as long as it exceeds the required effective suction head, There is no need to restrict the operation of the concentrate pump, and the device does not have to be restricted or stopped as in the past, and the device can operate stably. In addition, if the calculated effective suction head falls below the required effective suction head, the concentrate pump can be stopped immediately, making it possible to protect the concentrate pump and prevent damage caused by cavitation. be able to.
以下第１図および第２図を参照して本考案の一
実施例を説明する。第１図は本実施例による廃液
蒸発装置の概略構成を示す図である。図中符号１
は蒸発器を示す。この蒸発器１には濃縮液ポンプ
２を介挿した再循環配管３が接続されており、ま
た濃縮液ポンプ２の吐出側の再循環配管３には、
加熱器４が介挿されている。そして上記濃縮液ポ
ンプ２により蒸発器１内の濃縮液を加熱器４を通
して再循環させる構成である。上記蒸発器１には
圧力検出器５および液位検出器６が設けられてお
り、蒸発器１内の圧力および蒸発器１内の濃縮液
の液位を検出する構成である。また濃縮液ポンプ
２の吸込側の再循環配管３には、温度検出器７が
設けられており、循環する濃縮液の温度を検出す
る構成である。これら圧力検出器５、液位検出器
６および温度検出器７の検出信号は運転制御装置
８に入力され、運転制御装置８はこれらの検出信
号をもとに前記濃縮液ポンプ２の運転を制御す
る。 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a diagram showing a schematic configuration of a waste liquid evaporator according to this embodiment. Code 1 in the diagram
indicates an evaporator. A recirculation pipe 3 in which a concentrate pump 2 is inserted is connected to the evaporator 1, and the recirculation pipe 3 on the discharge side of the concentrate pump 2 is connected to the
A heater 4 is inserted. The concentrate pump 2 is configured to recirculate the concentrate in the evaporator 1 through the heater 4. The evaporator 1 is provided with a pressure detector 5 and a liquid level detector 6, which are configured to detect the pressure within the evaporator 1 and the liquid level of the concentrated liquid within the evaporator 1. Further, a temperature detector 7 is provided in the recirculation pipe 3 on the suction side of the concentrate pump 2, and is configured to detect the temperature of the circulating concentrate. Detection signals from the pressure detector 5, liquid level detector 6, and temperature detector 7 are input to an operation control device 8, and the operation control device 8 controls the operation of the concentrate pump 2 based on these detection signals. do.
上記運転制御装置は第２図に示すような制御を
行なう。まず液位検出器６からの検出信号をもと
に蒸発器１内の液位（％）を（ｍ）に換算して液
位Ａ（ｍ）を算出する。また圧力検出器５からの
検出信号をもとに蒸発器１内の圧力を絶対圧力に
換算して圧力Ｂ（Kg／cm2）を算出し温度検出器７
からの検出信号をもとに濃縮液温度の飽和蒸気圧
力Ｃ（Kg／cm2）を算出する。次に上記液位Ａ（ｍ）
に０％液位から濃縮液ポンプ２の中心までの静水
頭（ｍ）を加算して液位Ｄ（ｍ）を求める。一方
上記圧力Ｂ（Kg／cm2）から飽和蒸気圧Ｃ（Kg／cm2）
を減算してＥ（Kg／cm2）を求め、このＥ（Kg／cm2）
をｍに換算しＦ（ｍ）を求める。そしてこれらＤ
（ｍ）、Ｆ（ｍ）および濃縮液ポンプ２の吸込側管
路圧損Ｇ（ｍ）をもとに次式に示す演算を行ない
有効吸込ヘツド（HPSHav）を算出する。 The operation control device performs control as shown in FIG. First, the liquid level (%) in the evaporator 1 is converted into (m) based on the detection signal from the liquid level detector 6 to calculate the liquid level A (m). Also, based on the detection signal from the pressure detector 5, the pressure inside the evaporator 1 is converted into absolute pressure to calculate the pressure B (Kg/cm 2 ), and the pressure is sent to the temperature detector 7.
The saturated vapor pressure C (Kg/cm 2 ) of the concentrated liquid temperature is calculated based on the detection signal from the . Next, the above liquid level A (m)
The static water head (m) from the 0% liquid level to the center of the concentrate pump 2 is added to the liquid level D (m) to obtain the liquid level D (m). On the other hand, from the above pressure B (Kg/cm 2 ) to the saturated vapor pressure C (Kg/cm 2 )
Subtract to find E (Kg/cm 2 ), and this E (Kg/cm 2 )
is converted to m to find F(m). And these D
(m), F(m) and the suction side pipe pressure loss G(m) of the concentrate pump 2, the calculation shown in the following equation is performed to calculate the effective suction head (HPSHav).
Ｄ（ｍ）−Ｇ（ｍ）＋Ｆ（ｍ）＝NPSHav …（）
そしてこの算出された有効吸込ヘツド
（NPSHav）とあらかじめ設定された必要有効吸
込ヘツド（NPSHreq）とを比較して、NPSHav
＞NPSHreqであれば濃縮液ポンプ２をそのまま
運転させ、NPSHav＜NPSHreqであれば、濃縮
液ポンプ２を停止させる。すなわち圧力検出器
５、液位検出器６および温度検出器７からの検出
信号をもとに有効吸込ヘツド（NPSHav）を逐
時算出し、この有効吸込ヘツド（NPSHav）と
あらかじめ設定された必要有効吸込ヘツド
（NPSHreq）との比較を行ないそれによつて濃
縮液ポンプ２の運転を制御する構成である。 D(m)-G(m)+F(m)=NPSHav...() Then, compare this calculated effective suction head (NPSHav) with the preset required effective suction head (NPSHreq), and calculate NPSHav.
> NPSHreq, the concentrate pump 2 is operated as is, and if NPSHav<NPSHreq, the concentrate pump 2 is stopped. In other words, the effective suction head (NPSHav) is calculated one by one based on the detection signals from the pressure detector 5, liquid level detector 6, and temperature detector 7, and the effective suction head (NPSHav) and the required effective suction head (NPSHav) are calculated in advance. The configuration is such that a comparison is made with the suction head (NPSHreq) and the operation of the concentrate pump 2 is controlled based on the comparison.
以上の構成によると、有効吸込ヘツド
（NPSHav）を逐時算出して必要有効吸込ヘツド
（NPSHreq）と比較しているので、従来のよう
に不必要に濃縮液ポンプ２の運転を制限したりあ
るいは停止させたりすることはなく、本当に停止
させる必要があるときのみ濃縮液ポンプ２を停止
させることが可能となり装置として安定した運転
を行なうことができ、また有効吸込ヘツド
（NPSHav）が必要有効吸込ヘツド（NPSHreq）
を下回つたときには濃縮液ポンプ２を確実に停止
させることができるのでキヤビテーシヨン発生を
未然に防止することができ濃縮液ポンプ２の健全
性を損なうこともない。 According to the above configuration, since the effective suction head (NPSHav) is calculated from time to time and compared with the required effective suction head (NPSHreq), the operation of the concentrate pump 2 may be unnecessarily restricted or It is possible to stop the concentrate pump 2 only when it is really necessary to stop it, and the device can operate stably.In addition, an effective suction head (NPSHav) is required. (NPSHreq)
Since the concentrate pump 2 can be reliably stopped when the concentration drops below the limit, cavitation can be prevented from occurring and the integrity of the concentrate pump 2 will not be impaired.
以上詳述したように本考案による廃液蒸発装置
は、蒸発器と、この蒸発器内の濃縮液を加熱器を
介して循環させる濃縮液ポンプとを備えた廃液蒸
発装置において、上記蒸発器の液位・圧力および
循環する濃縮液温度から有効吸込ヘツドを算出し
あらかじめ設定された上記濃縮液ポンプの必要有
効吸込ヘツドとを比較して算出した有効吸込ヘツ
ドが必要有込ヘツドを下回つた時濃縮液ポンプを
停止させる運転制御装置を設けた構成である。 As described in detail above, the waste liquid evaporator according to the present invention is a waste liquid evaporator equipped with an evaporator and a concentrate pump that circulates the concentrated liquid in the evaporator via a heater. Concentrate when the effective suction head calculated by calculating the effective suction head from the level, pressure, and circulating concentrate temperature and comparing it with the required effective suction head of the concentrate pump set in advance is less than the required loading head. This configuration includes an operation control device that stops the liquid pump.
したがつて、蒸発器の液位・圧力および循環す
る濃縮液温度からその運転状態における有効吸込
ヘツドを算出し、必要有効吸込ヘツドと比較して
いるので、必要有刻吸込ヘツドを上回つている限
り濃縮液ポンプの運転を制限する必要はなく、従
来のように不必要に運転を制限したりあるいは停
止させたりすることはなくなり、装置として安定
した運転を行なうことができる。また算出した有
効吸込ヘツドが必要有効吸込ヘツドを下回つた場
合には速やかに濃縮液ポンプを停止させることが
できるので濃縮液ポンプを保護することが可能と
なりキヤビテーシヨン発生による損傷等を未然に
防止することができる等その効果は大である。 Therefore, the effective suction head in the operating state is calculated from the liquid level and pressure of the evaporator and the temperature of the circulating concentrated liquid, and compared with the required effective suction head, so that it exceeds the required effective suction head. As far as possible, there is no need to limit the operation of the concentrate pump, and unlike in the past, there is no need to restrict or stop the operation unnecessarily, and the device can operate stably. In addition, if the calculated effective suction head falls below the required effective suction head, the concentrate pump can be stopped immediately, making it possible to protect the concentrate pump and prevent damage caused by cavitation. The effect is great.
第１図および第２図は本考案の一実施例を示す
図で、第１図は廃液蒸発装置の概略構成図、第２
図は運転制御装置の制御を示す図である。
１……蒸発器、２……濃縮液ポンプ、４……加
熱器、５……圧力検出器、６……液位検出器、７
……温度検出器、８……運転制御装置。
1 and 2 are diagrams showing one embodiment of the present invention, in which FIG. 1 is a schematic configuration diagram of a waste liquid evaporator, and FIG.
The figure is a diagram showing control of the operation control device. 1... Evaporator, 2... Concentrate pump, 4... Heater, 5... Pressure detector, 6... Liquid level detector, 7
...Temperature detector, 8...Operation control device.
Claims (1)
して循環させる濃縮液ポンプとを備えた廃液蒸発
装置において、上記蒸発器の液位・圧力および循
環する濃縮液温度から有効吸込ヘツドを算出しあ
らかじめ設定された上記濃縮液ポンプの必要有効
吸込ヘツドとを比較して算出した有効吸込ヘツド
が必要有効吸込ヘツドを下回つた時濃縮液ポンプ
を停止させる運転制御装置を設けたことを特徴と
する廃液蒸発装置。 In a waste liquid evaporator equipped with an evaporator and a concentrate pump that circulates the concentrate in the evaporator via a heater, the effective suction head is determined from the liquid level and pressure of the evaporator and the temperature of the circulating concentrate. The invention is characterized by being provided with an operation control device that stops the concentrate pump when the calculated effective suction head falls below the required effective suction head by comparing the calculated and preset required effective suction head of the concentrate pump. Waste liquid evaporation equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5048683U JPS59155597U (en) | 1983-04-05 | 1983-04-05 | Waste liquid evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5048683U JPS59155597U (en) | 1983-04-05 | 1983-04-05 | Waste liquid evaporator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59155597U JPS59155597U (en) | 1984-10-18 |
| JPH0143675Y2 true JPH0143675Y2 (en) | 1989-12-18 |
Family
ID=30180944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5048683U Granted JPS59155597U (en) | 1983-04-05 | 1983-04-05 | Waste liquid evaporator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59155597U (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0679710B2 (en) * | 1987-11-10 | 1994-10-12 | 三菱電線工業株式会社 | Cyan waste liquid treatment device |
-
1983
- 1983-04-05 JP JP5048683U patent/JPS59155597U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59155597U (en) | 1984-10-18 |
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