JPS5830398A - Heating and dissolving method for sludge of crude oil tank - Google Patents
Heating and dissolving method for sludge of crude oil tankInfo
- Publication number
- JPS5830398A JPS5830398A JP56129743A JP12974381A JPS5830398A JP S5830398 A JPS5830398 A JP S5830398A JP 56129743 A JP56129743 A JP 56129743A JP 12974381 A JP12974381 A JP 12974381A JP S5830398 A JPS5830398 A JP S5830398A
- Authority
- JP
- Japan
- Prior art keywords
- crude oil
- oil
- sludge
- tank
- solvent
- 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.)
- Pending
Links
Abstract
Description
【発明の詳細な説明】
本発明は原油タンクスラッジ加熱溶解処理方法に関する
ものであり、スラッジ溶解加熱源として通油量、ならび
に熱負荷の大なる石油加熱炉、および常圧蒸留塔を使用
して溶解工程の短縮、あるいは安全面の向上を図るもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for heating and dissolving crude oil tank sludge, which uses an oil heating furnace with a large amount of oil passing and a large heat load, and an atmospheric distillation column as the sludge melting heating source. This aims to shorten the melting process or improve safety.
タンクスラッジはワックス分、重質油分、泥水外等より
成る高流動点の混合物であり、原油受払い時の持ち込み
や配管の錆などにより、経時的に蓄積される。これらの
スラッジは法で定められた定期開放検査時には搬出処理
しなければならず、それに要する費用や時間は多大なも
のとなる。Tank sludge is a mixture of wax, heavy oil, muddy water, etc. with a high pour point, and accumulates over time due to crude oil brought in when receiving and discharging crude oil, rusted pipes, etc. These sludges must be removed and disposed of during periodic inspections required by law, which requires a great deal of cost and time.
従来よシタンクスラツジ加熱溶解処理には溶媒油による
加熱溶解処理法や温水による加熱溶解処理法などがある
が、これらの従来法を第１図にて説明すると、溶媒油に
よる加熱溶解処理法はスラッジ１の堆積した原油タンク
２に、溶媒油３として原油または軽油をスラッジ：原油
比＝１：１〜１．５にて導入する。次にスチーム４にて
駆動する仮設の往復式ポンプ５にて仮設のスチームヒー
ター６に送シ込まれる。スチームヒーター６に送シ込ま
れた溶媒油３は加熱された後に仮設のリターンライン７
を経て、ドレン払い出しライン８よシ原油タンク２に戻
る。Conventionally, heat dissolution treatment for sludge sludge includes a heat dissolution treatment method using solvent oil and a heat dissolution treatment method using hot water, but these conventional methods are explained using Figure 1. Crude oil or light oil is introduced as a solvent oil 3 into the crude oil tank 2 in which sludge:crude oil is deposited at a sludge:crude oil ratio of 1:1 to 1.5. Next, the steam is sent to a temporary steam heater 6 by a temporary reciprocating pump 5 driven by the steam 4. The solvent oil 3 sent to the steam heater 6 is heated and then a temporary return line 7
After that, it returns to the crude oil tank 2 through the drain discharge line 8.
以上の如く、溶媒油３ｉｊ時間経過と共に温度を上昇さ
せて６０℃前後にてスラッジワックスの溶解を確認した
後に循環を停止する。一方、温水による方法は上述した
方法中の溶媒油の原油または軽油に代えて、王水あるい
は海水を用い、スラッジ分散剤を併用するものである。As described above, the temperature of the solvent oil 3ij is increased as time elapses, and after confirming that the sludge wax has melted at around 60° C., the circulation is stopped. On the other hand, the hot water method uses aqua regia or seawater in place of crude oil or light oil as the solvent oil in the above-mentioned method, and also uses a sludge dispersant.
これらの溶解工程（−次処理）で残存した強固々スラッ
ジを、場合によシ更に二次処理により物理的に除去し、
仕上は掃除（人による掻出し）して原油タンクのクリー
ニングが行われる。前記の従来法による溶解工程は通常
１０日〜１５日を臂し、全工程では４０日程度を要する
。In some cases, the hard sludge remaining in these melting processes (secondary treatment) is physically removed by further secondary treatment.
The final step is cleaning (scraping by hand) and cleaning of the crude oil tank. The dissolution process according to the conventional method usually takes 10 to 15 days, and the entire process takes about 40 days.
従来の加熱溶解処理工程では一般にはタンク周辺にてス
ラッジ処理を実施することと、タンク敷地内への仮設電
気設備の搬入が望ましくないことから、小容量のスチー
ム駆動往復式ポンプおよび石油加熱炉と比較して熱負荷
の小なるスチームヒーターを用いなければならず、その
ためにタンク内油（水）温の昇温速度の小なることを余
儀なくされる。また、循環油の組成はほとんど変化しな
いために、油温上昇とともに軽質炭化水素の蒸気圧が高
くなることから処理タンク周辺における炭化水素ガス濃
度が増大し、作業上の危険性が増すという問題があった
。In the conventional heating melting process, sludge treatment is generally carried out around the tank, and it is undesirable to bring temporary electrical equipment into the tank site, so a small-capacity steam-driven reciprocating pump and an oil-heating furnace are used. In comparison, it is necessary to use a steam heater with a small heat load, and therefore the rate of temperature rise of the oil (water) in the tank is forced to be slow. In addition, since the composition of the circulating oil hardly changes, the vapor pressure of light hydrocarbons increases as the oil temperature rises, increasing the concentration of hydrocarbon gas around the processing tank and increasing the danger of work. there were.
本発明は上記の点に鑑みて成されたものであって、従来
のスチーム駆動往復ポンプに代えて、大容量の原油蒸留
塔供給ポンプを用いることによる通油量の増大を口論み
、また、加熱源はスチームヒーターに代えて、熱負荷の
よシ大なる石油加熱炉を用いることでスラッジ溶解時間
の短縮を図るとともに、後続の蒸留塔にてＬＰＧ相当の
軽質炭化水素を採取するととによりタンク周辺での炭化
水米ガスの発生を抑制し、安全面の向上を図ることを目
的とするものである。The present invention has been made in view of the above points, and aims to increase the amount of oil passing by using a large-capacity crude oil distillation column supply pump in place of the conventional steam-driven reciprocating pump. Instead of a steam heater, the heating source is an oil-fired furnace with a high heat load to shorten the sludge melting time, and to collect light hydrocarbons equivalent to LPG in the subsequent distillation column. The purpose is to suppress the generation of hydrocarbon gas in the surrounding area and improve safety.
即ち、本発明は原油タンク底部に堆積したスラッジに溶
媒として原油又は軽油（共油）を約同量加え、加熱源を
用いて循環加熱し、スラッジに含まれる多肴のワックス
を溶媒中に溶出せしめた後に固型物と油分を分離するス
ラッジ処理方法であって、加熱源として常圧蒸留装置の
石油加熱炉を使用して溶解速度を早めること、ならびに
常圧蒸留塔に通油して軽質油分を採取することにより処
理タンク付近での炭化水素ガス雰囲気の低減を図ること
を特徴とする原油タンクスラッジ加熱溶解処理方法であ
る。That is, in the present invention, approximately the same amount of crude oil or light oil (co-oil) is added as a solvent to the sludge deposited at the bottom of a crude oil tank, and the sludge is circulated and heated using a heating source to dissolve the waxes contained in the sludge into the solvent. This is a sludge treatment method that separates solids and oil after sludge treatment, which uses an oil heating furnace in an atmospheric distillation unit as a heating source to speed up the dissolution rate, and passes oil through an atmospheric distillation column to separate light sludge. This is a method for heating and dissolving crude oil tank sludge, which is characterized by reducing the hydrocarbon gas atmosphere near the processing tank by collecting oil.
以下本発明の実施例を第２図に基づいて具体的に詳述す
る。Embodiments of the present invention will be described in detail below with reference to FIG.
下記の表１
表 １
に示した性状のスラッジ１が経年的に堆積した５ ００
００１１容量の原油タンク２のスラッジ１４５００ｆｒ
Ｌ３の上に他タンクから原油９ ６５００に〃を移送す
る。その後に比較的流計の大なる既設の常圧蒸留塔原油
供給ポンプ１０にで仮設のバイパスライン１１、既設の
石油加熱炉１２、既設の常圧蒸留塔１３、および既設の
スロップライン１４を経由して、毎時１８０１１で溶媒
原油３を循環させる。この時に原油予熱交換器群１５並
びに前留塔１６は循環原油？中に竹解分散したスラッジ
粒子による汚れを防止するためにバイパスライン１１を
仮設し、それに通油した。耐媒原油９目上記ＩＩｆ￥に
で循環されるが、先ず熱負荷の高い石油加熱炉１２にて
１１０℃まで昇温され、次いで常圧蒸留塔１３にてヘキ
サン以下に相当する低沸点留分１７を溶媒原油１００容
量部に対して４容量部弱採取し、溶媒原油９の突沸防止
を考慮して冷却器１８にて９０℃まで降温させた後に既
設のスロップライン１４を経て、仮に接続させたドレン
払いＬ１１シライン８よυ元の原油タンク２に戻る。500 sludge 1 with the properties shown in Table 1 below has accumulated over the years.
0011 capacity crude oil tank 2 sludge 14500fr
Transfer crude oil 96,500 from another tank onto L3. After that, it is passed through a temporary bypass line 11, an existing oil heating furnace 12, an existing atmospheric distillation column 13, and an existing slop line 14 to the existing atmospheric distillation column crude oil supply pump 10, which has a relatively large flow meter. The solvent crude oil 3 is circulated at a rate of 18,011 hours per hour. At this time, the crude oil preheating exchanger group 15 and the pre-distillation column 16 are circulating crude oil? A bypass line 11 was temporarily installed to prevent contamination by sludge particles dispersed in bamboo, and oil was passed through the bypass line 11. The solvent-resistant crude oil 9 is circulated in the above-mentioned IIf\, but is first heated to 110°C in the oil heating furnace 12 with a high heat load, and then in the atmospheric distillation column 13 as a low boiling point fraction equivalent to hexane or lower. A little less than 4 parts by volume of Solvent Crude Oil 9 were collected from 100 parts by volume of Solvent Crude Oil, and the temperature was lowered to 90°C in a cooler 18 in order to prevent the solvent crude oil 9 from boiling, and then it was temporarily connected via the existing slop line 14. Drain the drain L11 line 8 and return to the original crude oil tank 2.
原油タンク２においてはスラッジ１の流動点が＋５０℃
であること、および炭化水素ガス濃度の増大抑制を考慮
して、溶媒原油の平均油温を６０℃以下に管理した。循
環原油中には時間経過と共にスラッジ中のワックス分や
油分が分散溶解して、その油温、流動点、動粘度、泥水
外を増加させてゆく。これらの各性状が恒量値になった
時点をスラッジ溶解の終点としたととる、この溶解工程
には１４５時間（約６日間）しか費さ彦かった。捷たこ
の溶解工程後の残存スラッジは下記の表２表 ２
１）、２）は表１の場合と同じ意味を表わす。In crude oil tank 2, the pour point of sludge 1 is +50℃
In consideration of this and suppression of increase in hydrocarbon gas concentration, the average oil temperature of the solvent crude oil was controlled to be 60° C. or lower. As time passes, the wax and oil in the sludge are dispersed and dissolved in the circulating crude oil, increasing the oil temperature, pour point, kinematic viscosity, and muddy water content. The end point of sludge dissolution was taken as the point at which each of these properties reached a constant weight value, and this dissolution process took only 145 hours (approximately 6 days). The remaining sludge after the melting process of the shredded material is shown in Table 2 below. 1) and 2) have the same meaning as in Table 1.
の性状を有し、その址は約３１０７Ｋ”であった。It had the following characteristics and its age was approximately 3107K''.
なお従来法では原油タンク底部スラッジの性状によって
も異なるが溶媒油による方法では本実施例と同程度の規
模では５００〜６００ｔｒＬ３、まだ温海水による方法
では７００〜ａｏｏｍｓ程度のスラッジが残存する。In the conventional method, although it depends on the properties of the sludge at the bottom of the crude oil tank, in the method using solvent oil, 500 to 600 trL3 of sludge remains on a scale similar to that of this example, and in the method using warm seawater, about 700 to aooms of sludge remains.
従って本発明によれば残存スラッジ量がはるかに少なく
なシ、クリーニング工程を含む全工程は２７日程度と大
巾に短縮することができた。なお参考のために本実施例
と従来法による比較例についてのその他のデータを表３
に総括した。Therefore, according to the present invention, the amount of residual sludge is much smaller, and the entire process including the cleaning process can be significantly shortened to about 27 days. For reference, other data regarding this example and a comparative example using the conventional method are shown in Table 3.
summarized in.
表 ６
以上の様に本発明によシタンク容量の有効利用が図られ
、工期の短縮、ならびに労働衛生、安全面の向上をも図
ることができる。Table 6 As described above, according to the present invention, the capacity of the tank can be used effectively, the construction period can be shortened, and occupational health and safety can also be improved.
第１図は従来例の概略フロー図であシ、第２図は本発明
方法の実施例の概略フロー図である。
図中符号：
１・・・スラッジ；２・・・原油タンク：３・・・溶媒
油又は水；４・・・スチーム；５・・・スチーム駆動往
復式ポンプ：６・・・スチームヒーターニア・ｅ・リタ
ーンライン；８・・・ドレン払い出しライン；９・骨・
原油；１０・・・常圧蒸留塔供給用ポンプ；１１・・・
仮設バイパスライン；１２・・・石油加熱炉：１３−＠
−常圧蒸留塔；１４・−・スロップライン；１５−＠・
原油予熱交換器；１６・・・前留塔；１７・・・低沸点
留分；１Ｂ・・・冷却器。
（９）
５５９FIG. 1 is a schematic flow diagram of a conventional example, and FIG. 2 is a schematic flow diagram of an embodiment of the method of the present invention. Codes in the figure: 1...Sludge; 2...Crude oil tank: 3...Solvent oil or water; 4...Steam; 5...Steam-driven reciprocating pump: 6...Steam heater near... e・Return line; 8...Drain discharge line; 9・Bone・
Crude oil; 10...Normal pressure distillation column supply pump; 11...
Temporary bypass line; 12...Oil heating furnace: 13-@
-Normal pressure distillation column; 14--Slop line; 15-@-
Crude oil preheating exchanger; 16... Front distillation tower; 17... Low boiling point fraction; 1B... Cooler. (9) 559
Claims (1)
、常圧蒸留装置の石油加熱炉を用いて循環加熱し、スラ
ッジに含まれるワックスを溶媒中に溶出せしめた後に固
型物と油分を分離し、常圧蒸留塔に通油して軽質油分を
採取することを特徴とする原油タンクスラッジ加熱溶解
処理方法。Approximately the same amount of solvent is added to the sludge deposited at the bottom of the crude oil tank, and the oil heating furnace of the atmospheric distillation equipment is used to circulate and heat the sludge, and the wax contained in the sludge is eluted into the solvent, after which solids and oil are separated. A method for heating and dissolving crude oil tank sludge, which is characterized by passing the oil through an atmospheric distillation column to collect light oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56129743A JPS5830398A (en) | 1981-08-19 | 1981-08-19 | Heating and dissolving method for sludge of crude oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56129743A JPS5830398A (en) | 1981-08-19 | 1981-08-19 | Heating and dissolving method for sludge of crude oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5830398A true JPS5830398A (en) | 1983-02-22 |
Family
ID=15017105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56129743A Pending JPS5830398A (en) | 1981-08-19 | 1981-08-19 | Heating and dissolving method for sludge of crude oil tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5830398A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5580391A (en) * | 1993-10-15 | 1996-12-03 | Petroleo Brasileiro S.A. - Petrobras | Process for the thermo-chemical cleaning of storage tanks |
| CN103693824A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Deep extraction coking treatment process of oil-containing sludge |
| CN103693833A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Comprehensive control method of oily sludge |
| CN103693823A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Harmless treatment method of oil-containing sludge |
| CN103693825A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Resource treatment method of oil-containing sludge |
| CN103693834A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Resource combined treatment method of oil-containing sludge |
-
1981
- 1981-08-19 JP JP56129743A patent/JPS5830398A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5580391A (en) * | 1993-10-15 | 1996-12-03 | Petroleo Brasileiro S.A. - Petrobras | Process for the thermo-chemical cleaning of storage tanks |
| CN103693824A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Deep extraction coking treatment process of oil-containing sludge |
| CN103693833A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Comprehensive control method of oily sludge |
| CN103693823A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Harmless treatment method of oil-containing sludge |
| CN103693825A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Resource treatment method of oil-containing sludge |
| CN103693834A (en) * | 2012-09-28 | 2014-04-02 | 中国石油天然气股份有限公司 | Resource combined treatment method of oil-containing sludge |
| CN103693823B (en) * | 2012-09-28 | 2015-08-19 | 中国石油天然气股份有限公司 | The treatment process that a kind of oily sludge is innoxious |
| CN103693833B (en) * | 2012-09-28 | 2015-10-28 | 中国石油天然气股份有限公司 | A kind of comprehensive processing method of oily sludge |
| CN103693834B (en) * | 2012-09-28 | 2015-10-28 | 中国石油天然气股份有限公司 | A kind of resource utilization combination treatment method of oily sludge |
| CN103693824B (en) * | 2012-09-28 | 2015-10-28 | 中国石油天然气股份有限公司 | A kind of degree of depth extraction coking treatment process of oily sludge |
| CN103693825B (en) * | 2012-09-28 | 2015-10-28 | 中国石油天然气股份有限公司 | A kind of recycling processing method of oily sludge |
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