JPH0322235B2 - - Google Patents
Info
- Publication number
- JPH0322235B2 JPH0322235B2 JP59049971A JP4997184A JPH0322235B2 JP H0322235 B2 JPH0322235 B2 JP H0322235B2 JP 59049971 A JP59049971 A JP 59049971A JP 4997184 A JP4997184 A JP 4997184A JP H0322235 B2 JPH0322235 B2 JP H0322235B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- polypig
- petrochemicals
- piping
- nitrogen gas
- 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
Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 19
- 238000004140 cleaning Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 239000003348 petrochemical agent Substances 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000006200 vaporizer Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Cleaning In General (AREA)
Description
【発明の詳細な説明】
本発明は、特に異品種液体が交互に移送される
ような配管内を、両液の混合をさけるため残留濃
度がppmオーダになるまで洗浄できるようにした
配管内洗浄方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention is an in-pipe cleaning method that can clean the inside of a pipe in which different types of liquids are alternately transferred, in particular, until the residual concentration reaches the ppm order in order to avoid mixing of both liquids. Regarding the method.
従来から異品種液体、例えばシエルゾール、オ
キシトール等の石油化学品を交互に移送する際、
その都度管内を洗浄する方法として、ポリピグ工
法が採用されており、第１図に示すものは、同工
法を利用した従来の配管内洗浄装置１である。 Traditionally, when transferring different types of liquids, such as petrochemicals such as cielsol and oxytol,
The polypig method is adopted as a method for cleaning the inside of the pipe each time, and what is shown in FIG. 1 is a conventional pipe cleaning device 1 that utilizes this method.
同図において、配管２の一端には、ポリピグ３
を挿入し得るランチヤー４が連通接続されてお
り、他の一端には、配管２内を移送されてくるポ
リピグ３が回収し得るキヤツチヤー５を連通接続
させてあり、ランチヤー４付近の配管２には、ボ
ール弁６及び該ボール弁の下流側傍に石油化学品
を貯溜するタンカー（図示せず）と連通接続され
た導入パイプ８が夫々連結されており、該導入パ
イプには、ボール弁９が装着されている。 In the same figure, a polypig 3 is attached to one end of the pipe 2.
A launcher 4 into which a polypig 3 transferred through the piping 2 can be collected is connected to the other end thereof, and a catcher 5 is connected to the other end of the piping 2 in the vicinity of the launcher 4. , a ball valve 6 and an introduction pipe 8 connected to a tanker (not shown) for storing petrochemicals are connected to the downstream side of the ball valve, and a ball valve 9 is connected to the introduction pipe. It is installed.
キヤツチヤー５付近の配管２には、ボール弁１
０及び該ボール弁の上流側傍に石油化学品を排出
する複数、例えば３本の排出パイプ１１Ａ，１１
Ｂ，１１Ｃが夫々連結されており、各排出パイプ
は、夫々に対応するタンク（図示せず）に連通接
続されており、また各排出パイプには、ボール弁
１２，１３，１４が夫々装置されている。 A ball valve 1 is installed in the pipe 2 near the catcher 5.
0 and a plurality of, for example, three, discharge pipes 11A, 11 for discharging petrochemicals near the upstream side of the ball valve.
B and 11C are connected to each other, and each discharge pipe is connected to a corresponding tank (not shown), and each discharge pipe is equipped with a ball valve 12, 13, and 14, respectively. ing.
ポリピグ３は、既知の如く円柱状で高密度発泡
ポリウレタンを母材として円柱状に形成されてお
り、表面に耐摩性に富んだ樹脂等がコーテイング
されたもので、その直径は、配管２の内径より大
きく設定されており、例えば呼び径６インチの配
管２には、直径６ 1/2インチのポリピグ３が使用
されている。 As is well known, the polypig 3 is formed in a cylindrical shape using high-density polyurethane foam as a base material, and its surface is coated with a highly wear-resistant resin, and its diameter is equal to the inner diameter of the pipe 2. For example, for piping 2 with a nominal diameter of 6 inches, a poly pig 3 with a diameter of 6 1/2 inches is used.
そしてある品種の石油化学品Ａをタンカからタ
ンクに供給するには、まずホール弁１２を開に
し、他のボール弁６，１０，１３，１４を閉に
し、次にボール弁９を開にして石油化学品Ａをタ
ンカから導入パイプ８を通して配管２内に導入
し、排出パイプ１１Ａから排出し、タンクに供給
する。 To supply a certain type of petrochemical product A from a tanker to a tank, first open the hall valve 12, close the other ball valves 6, 10, 13, and 14, and then open the ball valve 9. Petrochemical A is introduced from the tanker into the pipe 2 through the introduction pipe 8, discharged from the discharge pipe 11A, and supplied to the tank.
別品種の石油化学品Ｂを別のタンクから配管２
を通して別のタンクに供給するには、まず配管２
内を洗浄するが、この場合にはボール弁６，１０
を開にし、他のボール弁９，１２，１３，１４を
閉にする。そしてランチヤー４に挿入されたポリ
ピグ３を配管２内に高圧ガス等の圧力で走行させ
ることで、配管２の管壁に付着している残留石油
化学品Ａを除去するようにしている。 Piping a different type of petrochemical B from another tank 2
To supply another tank through pipe 2, first
In this case, the ball valves 6 and 10 are cleaned.
is opened and the other ball valves 9, 12, 13, and 14 are closed. Then, by running the polypig 3 inserted into the launcher 4 into the pipe 2 under the pressure of high-pressure gas or the like, residual petrochemicals A adhering to the pipe wall of the pipe 2 are removed.
ところで石油化学品の場合、特に他品種の石油
化学品との混合を極端にきらうものであり、洗浄
後の残留濃度は、ppmオーダでなければならな
い。しかし従来の当該配管内洗浄装置１では、第
１回洗浄後の残留濃度は0.5％オーダであり、そ
の後何回か洗浄を繰り返してもppmオーダにする
ことは不可能であり、実用上問題があつた。 By the way, in the case of petrochemicals, mixing with other types of petrochemicals is extremely difficult, and the residual concentration after cleaning must be on the order of ppm. However, in the conventional pipe cleaning device 1, the residual concentration after the first cleaning is on the order of 0.5%, and it is impossible to reduce it to ppm order even after repeated cleaning several times, which poses a practical problem. It was hot.
本発明は、上記した従来技術の欠点を除くため
になされたものであつて、ポリピグであらかじめ
洗浄された配管内に窒素ガス供給装置から窒素ガ
スを圧送し、その後配管内を密閉して真空吸引装
置により真空吸引するようにすることによつて、
管壁及び管壁に付着している石油化学品の酸化を
上記窒素ガスの配在により防ぐと共に、上記の真
空吸引によつて配管内の残留濃度をppmオーダま
で低下させるようにし、かくして１本の配管で異
品種の石油化学品を交互に支障なく移送できるよ
うにすることによつて、移送系全体のコストを低
減させ得る方法と、これを円滑に実施することの
できる装置の提供が、その目的である。 The present invention has been made in order to eliminate the drawbacks of the prior art described above, and involves pressure-feeding nitrogen gas from a nitrogen gas supply device into piping that has been previously cleaned with a polypig, and then sealing the piping and vacuum suction. By providing vacuum suction with the device,
Oxidation of the pipe wall and petrochemicals adhering to the pipe wall is prevented by the above-mentioned distribution of nitrogen gas, and the residual concentration inside the pipe is reduced to the order of ppm by the above-mentioned vacuum suction. An object of the present invention is to provide a method that can reduce the cost of the entire transfer system by making it possible to transfer different types of petrochemicals alternately without any trouble through piping, and to provide a device that can smoothly implement this method. That is the purpose.
以下本発明を図面に示す実施例に基づいて説明
する。第２図から第４図に示すものは、本発明に
係る方法を実施するのに用い得る配管内洗浄装置
２１であり、第１図に示す従来の配管内洗浄装置
１に窒素ガス供給装置２２と、真空吸引装置２３
とが付加されており、同図において、従来の配管
内洗浄装置１のものと同一の部分には、同一の符
号を付して説明は省略する。 The present invention will be described below based on embodiments shown in the drawings. What is shown in FIGS. 2 to 4 is a pipe cleaning device 21 that can be used to implement the method according to the present invention, and a nitrogen gas supply device 22 is added to the conventional pipe cleaning device 1 shown in FIG. and vacuum suction device 23
In the figure, the same parts as those of the conventional pipe cleaning device 1 are given the same reference numerals, and the explanation will be omitted.
窒素ガス供給装置２２は、液体窒素を貯溜する
タンク２５と、該タンクにボール弁２６を介して
パイプ２８により連結されかつ液体窒素を気化さ
せる気化器３０とを備えており、さらに該気化器
は、調整弁３２を介してパイプ３４によつてラン
チヤー４に連結され、同パイプ３４には圧力計３
３が付設されている。 The nitrogen gas supply device 22 includes a tank 25 that stores liquid nitrogen, and a vaporizer 30 that is connected to the tank by a pipe 28 via a ball valve 26 and that vaporizes the liquid nitrogen. , is connected to the launcher 4 by a pipe 34 via a regulating valve 32, and a pressure gauge 3 is connected to the pipe 34.
3 is attached.
真空吸引装置２３は、吸引ポンプ３６が、ボー
ル弁３８を介してパイプ４０によりボール弁１０
の上流側傍にあつて、配管２に連結されたもので
ある。 In the vacuum suction device 23, a suction pump 36 is connected to the ball valve 10 by a pipe 40 via a ball valve 38.
It is located near the upstream side of the pipe 2 and is connected to the pipe 2.
上記の如き配管内洗浄装置２１を用いて本発明
の方法を実施するには、第１図において説明した
ように、ある品種の石油化学品Ａをタンカより配
管２及び排出パイプ１１Ａを通してタンクに供給
した後、別品種の石油化学品Ｂを別のタンクに供
給する以前にあつて、先ず配管２の洗浄を行うた
め、ボール弁６，１０，２６を開にすると共に、
他のボール弁９，１２，１３，１４，３８を閉に
し、タンク２５に貯溜された液体窒素を気化器３
０によつて気化させて窒素ガスとして、該窒素ガ
スを調整弁３２によつて圧力約２〜３Kg／cm2Ｇに
調整してランチヤー４に送る。すると該ランチヤ
ーにあらかじめ挿入されたポリピグ３は、窒素ガ
スの圧力によつて配管２内を、管壁に付着してい
る残留石油化学品Ａを除去しながら走行し、キヤ
ツチヤー５により回収される。そしてこのポリピ
グ３による洗浄作業は、必要に応じ何回か繰り返
す。 In order to carry out the method of the present invention using the pipe cleaning device 21 as described above, as explained in FIG. After that, before supplying a different type of petrochemical B to another tank, first open the ball valves 6, 10, and 26 in order to clean the piping 2, and
The other ball valves 9, 12, 13, 14, and 38 are closed, and the liquid nitrogen stored in the tank 25 is transferred to the vaporizer 3.
The pressure of the nitrogen gas is adjusted to about 2 to 3 kg/cm 2 G by the regulating valve 32, and the nitrogen gas is sent to the launcher 4. Then, the polypig 3 inserted in advance into the launcher travels inside the pipe 2 under the pressure of nitrogen gas while removing residual petrochemicals A adhering to the pipe wall, and is recovered by the catcher 5. This cleaning operation using the polypig 3 is repeated several times as necessary.
次にこの状態で気化器３０によつて気化された
窒素ガスを調整弁３２によつて圧力約１〜２Kg／
cm2Ｇに調整してランチヤー４から配管２内に圧送
し、その後、ボール弁６，１０を閉にして配管２
内を密閉状態にし、ボール弁３８のみを開にし
て、吸引ポンプ３６によつて該配管内が1torr〜
10-1torrになるまで真空吸引する。 Next, in this state, the nitrogen gas vaporized by the vaporizer 30 is pumped through the regulating valve 32 at a pressure of about 1 to 2 kg/kg.
cm 2 G and force feed it from the launcher 4 into the pipe 2, then close the ball valves 6 and 10 and release the water into the pipe 2.
The inside of the pipe is sealed, only the ball valve 38 is opened, and the inside of the pipe is heated to 1 torr or more using the suction pump 36.
Vacuum to 10 -1 torr.
要するに本発明に係る方法は、上記実施例によ
つて具現される通り、シエルゾール、オキシドー
ル等の石油化学品が交互に移送される配管２を、
ポリピグ３によつて洗浄する方法において、前記
配管２内に前記ポリピグ３を少なくとも１回高圧
ガス等の圧力で走行させた後、前記配管２内に窒
素ガスを圧送し、その後該配管内を密閉して真空
吸引することを特徴とするものであるから、ポリ
ピグであらかじめ洗浄された配管内に、窒素ガス
が圧送され、更に配管内が密閉されて真空吸引さ
れることとなり、この結果管壁及び該管壁にわず
かに付着している石油化学品の酸化が上記窒素ガ
スの配圧により防止されて、次に移送されてくる
石油化学品の酸化が防止され、該石油化学品の品
質の低下を防止することができると共に、配管の
管壁に付着している大部分の石油化学品は上記真
空吸引により除去され、従つて残留濃度がppmオ
ーダまで低くなり、また次に移送されてくる石油
化学品の移送が容易になる。また異品種の石油化
学品を１本の配管により交互に移送することがで
きるので、複数の配管を用意する必要がなく、装
置全体のコストが低減する等の種々の効果があ
る。 In short, the method according to the present invention, as embodied in the above embodiment, connects the pipe 2 through which petrochemicals such as Cielsol and Oxidol are alternately transferred.
In the method of cleaning with a polypig 3, after the polypig 3 is run at least once in the pipe 2 under pressure such as high pressure gas, nitrogen gas is force-fed into the pipe 2, and then the inside of the pipe is sealed. Nitrogen gas is pumped into the piping, which has been previously cleaned with a polypig, and then the inside of the piping is sealed and vacuum suction is carried out. As a result, the pipe wall and Oxidation of petrochemicals slightly attached to the pipe wall is prevented by the above-mentioned pressure distribution of nitrogen gas, and oxidation of the petrochemicals transferred next is prevented, resulting in a decrease in the quality of the petrochemicals. In addition, most of the petrochemicals adhering to the pipe walls are removed by the vacuum suction described above, and the residual concentration is reduced to the order of ppm. Easier transport of chemicals. Furthermore, since different types of petrochemical products can be transferred alternately through one pipe, there is no need to prepare a plurality of pipes, and there are various effects such as a reduction in the cost of the entire apparatus.
第１図は従来の配管内洗浄装置を示す正面図、
第２図は本発明に係る方法の実施に用いることの
できる配管内洗浄装置の全体配管概略図、第３図
は第２図にあつて配管部分を示した正面図、第４
図は第３図のキヤツチヤー部分を示した一部切欠
の拡大正面図である。
２……配管、３……ポリピグ、４……ランチヤ
ー、５……キヤツチヤー。
Figure 1 is a front view of a conventional pipe cleaning device;
Fig. 2 is a schematic diagram of the entire piping of a pipe cleaning device that can be used to carry out the method according to the present invention, Fig. 3 is a front view showing the piping part in Fig. 2, and Fig. 4
The figure is an enlarged partially cutaway front view showing the catcher portion of FIG. 3. 2... Piping, 3... Polypig, 4... Launcher, 5... Catcher.
Claims (1)
ンチヤーとキヤツチヤーとが連設された配管内
を、当該キヤツチヤー内のポリピグによつて洗浄
する方法において、前記配管内に上記ポリピグを
少なくとも１回高圧ガス等の圧力でキヤツチヤー
へ走行させた後、当該配管内に窒素ガスを圧送
し、その後、該配管内を密閉状態として真空吸引
することを特徴とする配管内洗浄方法。1. A method in which the inside of a pipe in which liquids of different types are alternately transferred and a launcher and a catcher are installed in front and back, respectively, is cleaned with a polypig in the catcher, in which the polypig is placed in the pipe at least once under high pressure. 1. A method for cleaning the inside of a pipe, which comprises running gas or the like under pressure to a catcher, feeding nitrogen gas under pressure into the pipe, and then sealing the inside of the pipe and vacuum suctioning the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59049971A JPS60193578A (en) | 1984-03-15 | 1984-03-15 | Method and device for washing inside of piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59049971A JPS60193578A (en) | 1984-03-15 | 1984-03-15 | Method and device for washing inside of piping |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60193578A JPS60193578A (en) | 1985-10-02 |
| JPH0322235B2 true JPH0322235B2 (en) | 1991-03-26 |
Family
ID=12845901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59049971A Granted JPS60193578A (en) | 1984-03-15 | 1984-03-15 | Method and device for washing inside of piping |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60193578A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102409299B1 (en) * | 2020-06-11 | 2022-06-15 | 주식회사 아세아프로텍 | Pipe cleaning system |
| KR102513778B1 (en) * | 2022-01-26 | 2023-03-28 | 주식회사 이디테크놀로지 | Pigging apparatus and method for integrated water pipe network management navigation using low nitrogen and Self-driving |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58136988A (en) * | 1982-02-05 | 1983-08-15 | Tlv Co Ltd | Heat exchanger for heat recovery of drain |
| JPS599500A (en) * | 1982-07-09 | 1984-01-18 | Hitachi Ltd | Removing device for water remaining in tube |
-
1984
- 1984-03-15 JP JP59049971A patent/JPS60193578A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58136988A (en) * | 1982-02-05 | 1983-08-15 | Tlv Co Ltd | Heat exchanger for heat recovery of drain |
| JPS599500A (en) * | 1982-07-09 | 1984-01-18 | Hitachi Ltd | Removing device for water remaining in tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60193578A (en) | 1985-10-02 |
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