JPS6121713B2 - - Google Patents
Info
- Publication number
- JPS6121713B2 JPS6121713B2 JP55092248A JP9224880A JPS6121713B2 JP S6121713 B2 JPS6121713 B2 JP S6121713B2 JP 55092248 A JP55092248 A JP 55092248A JP 9224880 A JP9224880 A JP 9224880A JP S6121713 B2 JPS6121713 B2 JP S6121713B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid
- path
- cleaning
- sprayed
- spray nozzle
- 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 46
- 238000004140 cleaning Methods 0.000 claims description 35
- 239000007921 spray Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 6
- JCMLRUNDSXARRW-UHFFFAOYSA-N trioxouranium Chemical compound O=[U](=O)=O JCMLRUNDSXARRW-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 229910002007 uranyl nitrate Inorganic materials 0.000 description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 4
- 229910052770 Uranium Inorganic materials 0.000 description 4
- 229910017604 nitric acid Inorganic materials 0.000 description 4
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- ZQPKENGPMDNVKK-UHFFFAOYSA-N nitric acid;plutonium Chemical compound [Pu].O[N+]([O-])=O ZQPKENGPMDNVKK-UHFFFAOYSA-N 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910052778 Plutonium Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- OYEHPCDNVJXUIW-UHFFFAOYSA-N plutonium atom Chemical compound [Pu] OYEHPCDNVJXUIW-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
Landscapes
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
Description
【発明の詳細な説明】
本発明は最も広義には処理液噴霧ノズルの洗
浄、狭義には流動層反応塔の処理液噴霧ノズルの
洗浄に関し、最も狭義には硝酸ウラニル、硝酸プ
ルトニウム等を流動層反応によつて脱硝して酸化
物に転化する場合の処理液噴霧ノズルの洗浄に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates in the broadest sense to cleaning a treatment liquid spray nozzle, in the narrowest sense to cleaning a treatment liquid spray nozzle in a fluidized bed reaction tower, and in the narrowest sense to cleaning uranyl nitrate, plutonium nitrate, etc. in a fluidized bed. This invention relates to cleaning a treatment liquid spray nozzle when denitrifying and converting to oxides by reaction.
本発明は該ノズル洗浄の方法および装置に関す
る。 The present invention relates to a method and apparatus for cleaning the nozzle.
ウランおよびプラトニウムの硝酸系溶液を流動
層法によつて直接かつ連続的に熱分解する方法は
従来から行なわれている、いわゆる湿式法に比し
処理量の増大および廃液発生量の低減等に大きな
利点を有するが、装置の設計および運転管理が十
分であつても、噴霧ノズルの閉塞の可能性を有し
ており、万一、噴霧ノズルが閉塞すると、最悪の
場合には運転を停止しなければならない。 The method of directly and continuously thermally decomposing a nitric acid solution of uranium and platonium using a fluidized bed method has the advantage of increasing the throughput and reducing the amount of waste liquid generated compared to the conventional wet method. However, even if the design and operational management of the equipment are adequate, there is a possibility that the spray nozzle will become clogged, and if the spray nozzle becomes clogged, in the worst case, the operation will have to be stopped. Must be.
従来、このような噴霧ノズルの閉塞の解除は、
閉塞を感知した時点で、あらかじめ噴霧ノズルに
装置した洗浄用のニードルを機械的に作動させる
方法、または処理液の供給を停止し温水を供給す
る方法、あるいは両者の併用策が採られてきた。
しかしながら、前者の方法は、ニードルを機械的
に往復作動させるため、しばしばニードルの破損
を生ずる欠点を有するばかりか、ニードルの作動
時には流動層への処理供給が中断されることによ
り装置の運転管理に悪影響を及ぼすため、頻繁な
作動、特に閉塞防止のための定期的な作動は避け
る必要があつた。また、後者の方法は、温水の供
給に切り換える際に、バルブ操作等の繁雑さを伴
い、閉塞防止のための定期的な利用に困難がある
と共に、切り換え操作中に閉塞が更に進行し、洗
浄効果がなくなることがあつた。 Conventionally, unblocking of such spray nozzles is done by
When a blockage is detected, a method has been adopted in which a cleaning needle previously installed in the spray nozzle is mechanically operated, a method is to stop the supply of processing liquid and a method is to supply hot water, or a combination of both methods has been adopted.
However, the former method has the disadvantage that the needle is mechanically reciprocated, which often causes breakage of the needle. In addition, when the needle is operated, the processing supply to the fluidized bed is interrupted, making it difficult to manage the operation of the equipment. Frequent activation, especially periodic activation to prevent blockage, had to be avoided because of the negative effects. In addition, the latter method involves complicated valve operations when switching to hot water supply, making it difficult to use regularly to prevent blockages. There were times when the effect disappeared.
本発明によれば、被噴霧液の導路、それを取り
まく噴出気体の導路および該被噴霧液導路を洗浄
する洗浄液噴出路を具えた噴霧ノズルにおいて、
上記被噴霧液導路と上記洗浄液噴出路とを直線状
に配置して洗浄液噴出路を被噴霧液導路に臨ま
せ、被噴霧液体の供給路に逆流防止の逆止弁を設
けたことを特徴とする噴霧ノズルが提供される。 According to the present invention, in a spray nozzle that includes a channel for a liquid to be sprayed, a channel for ejected gas surrounding the channel, and a cleaning liquid ejection channel for cleaning the channel for the sprayed liquid,
The sprayed liquid guide path and the cleaning liquid jetting path are arranged in a straight line so that the cleaning liquid jetting path faces the sprayed liquid guiding path, and a check valve to prevent backflow is provided in the sprayed liquid supply path. A spray nozzle is provided.
次に図面を参照して本発明を具体的に説明す
る。 Next, the present invention will be specifically described with reference to the drawings.
第１図は本発明にかかる噴霧ノズルの概念を示
す図である。 FIG. 1 is a diagram showing the concept of a spray nozzle according to the present invention.
第１図に示される噴霧ノズルは被噴霧液導路１
と噴出気体導路２を有しており、両導路はノズル
の噴口部４で会合して、この部分で霧が生成す
る。ここまでのべた構成は全く既知であつて、組
立に便利なように適当な部品に分けて構成され、
それも当業者が適宜設計し得ることである。例え
ば噴口部にキヤツプ４１を取り付けて噴出気体の
出口２１を形成することも通常行なわれるところ
である。このような既知の噴霧ノズルでは被噴霧
液導路の噴口部１１にしばしば閉塞が起る。 The spray nozzle shown in FIG.
and an ejected gas conduit 2, both conduits meet at the nozzle nozzle part 4, and mist is generated in this part. The configuration described so far is completely known, and is divided into appropriate parts for convenient assembly.
This can also be appropriately designed by those skilled in the art. For example, it is common practice to attach a cap 41 to the nozzle part to form an outlet 21 for the ejected gas. In such known atomizing nozzles, blockages often occur in the orifice 11 of the liquid conduit to be atomized.
本発明にかかる噴霧ノズルの特徴は洗浄液の噴
出路３を有し、かつ被噴霧液導路１の供給側１２
の１部に逆止弁、例えばボール弁１３を備えてい
ることである。洗浄液噴出路３は導入管３１とし
て噴霧ノズル体に取り付けられ、洗浄液が直接に
ノズルの開口に向つて噴出されるように構成され
ている。即ち、洗浄液噴出路３は第１図に示すよ
うに上記被噴霧液導路１と直線状に配置され、該
洗浄液噴出路３の先端は上記被噴霧液導路１に向
つて延び、該導路１の噴出口１１に臨んでいる。
更に該洗浄液噴出路３は適当な導管手段によつて
洗浄液の加圧容器（第２図に示される）に連通す
る。この連通路の途中に、好ましくは噴霧器に近
い位置に、例えばタイマーに連動して作動する電
磁弁を設けて加圧洗浄液の供給を断続できるよう
にしておく。このような装置は当業者が容易に製
作し得るものであるから、それについて特に詳細
に述べる必要はない。 The spray nozzle according to the present invention is characterized by having a cleaning liquid jetting path 3 and a supply side 12 of the sprayed liquid guiding path 1.
A check valve, for example a ball valve 13, is provided in a part of the valve. The cleaning liquid jetting passage 3 is attached to the spray nozzle body as an introduction pipe 31, and is configured so that the cleaning liquid is jetted directly toward the opening of the nozzle. That is, as shown in FIG. 1, the cleaning liquid jetting path 3 is arranged in a straight line with the sprayed liquid guide path 1, and the tip of the cleaning liquid jetting path 3 extends toward the sprayed liquid guiding path 1. It faces the spout 11 of road 1.
Furthermore, the cleaning liquid outlet 3 communicates by suitable conduit means with a pressurized container of cleaning liquid (shown in FIG. 2). In the middle of this communication path, preferably at a position close to the sprayer, a solenoid valve that operates in conjunction with a timer is provided, for example, so that the supply of the pressurized cleaning liquid can be interrupted. Since such a device can be readily fabricated by those skilled in the art, it is not necessary to describe it in particular detail.
このような改良された自己洗浄できる噴霧ノズ
ルを用いて本発明の方法を実施するためには、例
えば第２図のようなシステムを設ける。反応塔２
００に噴霧液１０１を設け、それへの洗浄液供給
管にタイマー１０３によつて作動する電磁弁１０
２を設ける。 In order to carry out the method of the present invention using such an improved self-cleaning spray nozzle, a system as shown in FIG. 2, for example, is provided. Reaction tower 2
00 is provided with a spray liquid 101, and a solenoid valve 10 operated by a timer 103 is connected to a cleaning liquid supply pipe to the spray liquid 101.
2 will be provided.
洗浄液供給管は洗浄液の加圧貯槽１０４に接続
し、必要なら、さらに弁１１２を設ける。貯槽１
０４はヒーター１０５、加圧気体導入管系１０
６，圧力計１０７、洗浄液供給口１０９、圧力調
整弁１０８、溢流孔１１０、排出孔１１３を備え
ている。 The cleaning fluid supply pipe connects to a pressurized reservoir 104 of cleaning fluid and is further provided with a valve 112 if necessary. Storage tank 1
04 is a heater 105 and a pressurized gas introduction pipe system 10
6, a pressure gauge 107, a cleaning liquid supply port 109, a pressure regulating valve 108, an overflow hole 110, and a discharge hole 113.
このような系において、タイマーを適当な周期
にセツトし、貯槽内に適当な洗浄液を入れて、前
述の諸装置によつて適当な量、温度、圧力に維持
する。このように洗浄液をセツトされた周期に従
つて洗浄液をノズルに供給し、間けつ的にノズル
を洗浄することができる。この場合前述のように
ノズルの被噴霧液供給路には逆止弁１３が設けら
れ、被噴霧液との混合希釈が防止される。 In such a system, a timer is set for the appropriate period, and the appropriate cleaning fluid is placed in the reservoir and maintained at the appropriate volume, temperature, and pressure by the devices described above. In this way, the cleaning liquid can be supplied to the nozzles according to the set period, and the nozzles can be cleaned intermittently. In this case, as described above, the check valve 13 is provided in the spray liquid supply path of the nozzle to prevent mixing and dilution with the spray liquid.
洗浄液は被噴霧液に影響を与えないものが使用
される。 The cleaning liquid used is one that does not affect the liquid to be sprayed.
次に本発明の方法を実施例によつて具体的に説
明する。 Next, the method of the present invention will be specifically explained using examples.
実施例 １
硝酸ウラニル溶液（ウラン換算濃度500ｇ/）
を三酸化ウランの流動層へ噴霧ノズルによりウラ
ン換算2.5Kg/hrの速度で噴霧し280℃で熱分解し
連続的に三酸化ウランとする場合に次の通りに設
定した条件で噴霧ノズルの定期的洗浄を行なつ
た。Example 1 Uranyl nitrate solution (uranium equivalent concentration 500g/)
When spraying uranium trioxide into a fluidized bed of uranium trioxide at a rate of 2.5 kg/hr of uranium equivalent and thermally decomposing it at 280°C to continuously produce uranium trioxide, the spray nozzle is periodically operated under the following conditions. A thorough cleaning was carried out.
１洗浄液 純水
２同上温度 50℃
３同上圧力 ３Kg/cm2
４電磁作動開閉時間 0.5秒
５同上間隔 30分間
実施例 ２
実施例１に述べた方法で硝酸ウラニル溶液のウ
ラン換算濃度1200ｇ/、噴霧速度14Kg/hrで運転
し、次の通りの条件で噴霧ノズルの定期的洗浄を
行なつた。 1 Cleaning liquid Pure water 2 Same as above Temperature 50℃ 3 Same as above Pressure 3 Kg/cm 2 4 Electromagnetic operation opening/closing time 0.5 seconds 5 Same as above 30 minutes Example 2 Using the method described in Example 1, a uranyl nitrate solution with a uranium equivalent concentration of 1200 g/spray was sprayed. It was operated at a speed of 14 Kg/hr, and the spray nozzle was periodically cleaned under the following conditions.
１洗浄液 30％希硝酸水溶液
２同上温度 60℃
３同上圧力 ５Kg/cm2
４電磁作動弁開閉時間 0.8秒
５同上間隔 20分間
実施例１および２の両者において、従来数時間
の間隔で発生した噴霧ノズルの閉塞は完全になく
なり、装置の連続運転時間が飛躍的に増大すると
共に運転管理上の負担が軽減された。 1 Cleaning liquid 30% dilute nitric acid aqueous solution 2 Same as above Temperature 60℃ 3 Same as above Pressure 5 Kg/cm 2 4 Solenoid operated valve opening/closing time 0.8 seconds 5 Same as above Interval 20 minutes In both Examples 1 and 2, the spray that conventionally occurred at intervals of several hours. Nozzle blockage was completely eliminated, the continuous operation time of the device was dramatically increased, and the burden on operational management was reduced.
なお、上に記した実施例以外の経験から硝酸ウ
ラニル溶液の濃度が濃く、かつ処理量が多いとき
には温水より温希硝酸の方が閉塞解除効果がある
ことが判明したが、硝酸プルトニウムあるいは硝
酸ウランと硝酸プルトニウムの混合溶液を流動層
を用いて熱分解する場合には、硝酸プルトニウム
の加水分解を防止するため、被噴霧溶液の濃度に
かかわらず希硝酸を用いることにより噴霧ノズル
の閉塞解除は容易に行えると推定される。 Furthermore, from experience other than the examples described above, it has been found that when the concentration of the uranyl nitrate solution is high and the amount of treatment is large, warm dilute nitric acid is more effective in releasing blockages than hot water. When pyrolyzing a mixed solution of plutonium and plutonium nitrate using a fluidized bed, it is easy to unblock the spray nozzle by using dilute nitric acid, regardless of the concentration of the solution to be sprayed, in order to prevent hydrolysis of the plutonium nitrate. It is estimated that this can be done.
本発明は特に硝酸ウラニルの流動層反応による
脱硝酸反応の場合について詳細に説明したが、本
発明それ自身はどのような噴霧の場合にも応用で
きることは理解されよう。 Although the present invention has been particularly described in detail with respect to the denitrification reaction using a fluidized bed reaction of uranyl nitrate, it will be understood that the present invention itself can be applied to any type of spraying.
第１図は本発明にかかる噴霧ノズルの概念を示
す概略縦断面図。（１…被噴霧液導路、２…噴出
気体導路、３…洗浄液噴出路）、第２図は本発明
の方法を実施するための系統図である。
（２００…反応塔、１０１…噴霧ノズル、１０
２…電磁弁、１０３…タイマー、１０４…洗浄液
貯槽）。
FIG. 1 is a schematic vertical sectional view showing the concept of a spray nozzle according to the present invention. FIG. 2 is a system diagram for carrying out the method of the present invention. (200... Reaction tower, 101... Spray nozzle, 10
2...Solenoid valve, 103...Timer, 104...Cleaning liquid storage tank).
Claims (1)
導路および該被噴霧液導路を洗浄する洗浄液噴出
路を具えた噴霧ノズルにおいて、上記被噴霧液導
路と上記洗浄液噴出路とを直線状に配置して洗浄
液噴出路を被噴霧液導路に臨ませ、被噴霧液体の
供給路に逆流防止の逆止弁を設けたことを特徴と
する噴霧ノズル。1. In a spray nozzle equipped with a guide path for a liquid to be sprayed, a guide path for ejected gas surrounding the same, and a cleaning liquid jet path for cleaning the liquid guide path, the liquid to be sprayed and the cleaning liquid jet path are connected in a straight line. 1. A spray nozzle characterized in that the cleaning liquid ejection path is arranged in a shape such that the cleaning liquid ejection path faces the sprayed liquid guide path, and a check valve for preventing backflow is provided in the sprayed liquid supply path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9224880A JPS5719052A (en) | 1980-07-08 | 1980-07-08 | Washing of atomizing nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9224880A JPS5719052A (en) | 1980-07-08 | 1980-07-08 | Washing of atomizing nozzle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5719052A JPS5719052A (en) | 1982-02-01 |
| JPS6121713B2 true JPS6121713B2 (en) | 1986-05-28 |
Family
ID=14049118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9224880A Granted JPS5719052A (en) | 1980-07-08 | 1980-07-08 | Washing of atomizing nozzle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5719052A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0228964B2 (en) * | 1985-03-01 | 1990-06-27 | Koresawa Tetsukosho Kk |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0118478B1 (en) * | 1982-08-30 | 1989-07-26 | Labtest Equipment Company (S E Asia) Pty Ltd | Nebulizer |
| JPS59147189A (en) * | 1983-02-10 | 1984-08-23 | 株式会社竹中工務店 | Device for repairing leakage of duct and method of repair construction of leakage |
| JP2536011Y2 (en) * | 1992-07-16 | 1997-05-21 | 株式会社丸山製作所 | Cleaning device for chemical sprayer |
-
1980
- 1980-07-08 JP JP9224880A patent/JPS5719052A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0228964B2 (en) * | 1985-03-01 | 1990-06-27 | Koresawa Tetsukosho Kk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5719052A (en) | 1982-02-01 |
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