JPS62266395A - Method for removing adhesions on thermal conducting surface of waste heat recovery device - Google Patents
Method for removing adhesions on thermal conducting surface of waste heat recovery deviceInfo
- Publication number
- JPS62266395A JPS62266395A JP11019586A JP11019586A JPS62266395A JP S62266395 A JPS62266395 A JP S62266395A JP 11019586 A JP11019586 A JP 11019586A JP 11019586 A JP11019586 A JP 11019586A JP S62266395 A JPS62266395 A JP S62266395A
- Authority
- JP
- Japan
- Prior art keywords
- heat recovery
- sodium carbonate
- water
- recovery device
- pipe
- 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
- 238000011084 recovery Methods 0.000 title claims abstract description 17
- 239000002918 waste heat Substances 0.000 title claims abstract description 6
- 238000000034 method Methods 0.000 title abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 17
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- 238000005406 washing Methods 0.000 claims abstract description 14
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 claims abstract description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 17
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract description 16
- 239000000126 substance Substances 0.000 abstract description 13
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 abstract description 8
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 abstract description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 abstract description 8
- 239000004071 soot Substances 0.000 abstract description 5
- 239000007864 aqueous solution Substances 0.000 abstract description 4
- 229910000030 sodium bicarbonate Inorganic materials 0.000 abstract description 4
- 235000017557 sodium bicarbonate Nutrition 0.000 abstract description 4
- 235000011089 carbon dioxide Nutrition 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 2
- 239000007832 Na2SO4 Substances 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical class OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 etc. Chemical compound 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 229910000358 iron sulfate Inorganic materials 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000008237 rinsing water Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
Landscapes
- Cleaning By Liquid Or Steam (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ディーゼル、ガスタービン等の主機からの排
ガス中の熱を回収する装置の伝熱管外表面等の伝熱面に
付着した付着物を除去する方法に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to the treatment of deposits attached to heat transfer surfaces such as the outer surfaces of heat transfer tubes of devices for recovering heat in exhaust gas from main engines such as diesel engines and gas turbines. Regarding how to remove.
舶用ディーゼル主機や火力発電プラント等では、燃費の
向上を計るため、排ガスの排熱を排ガスエコノマイザ−
や排熱回収の熱交換装置等で回収するが、これらの装置
の伝熱面外表面には排ガスの煤や付着灰による汚れが生
じる。特に、舶用ディーゼル主機の排ガスエコノマイザ
−では、酸露点排ガス域９０°〜１２０°ＣまでのりＦ
熱回収が行なわれているが、燃料の粗悪化と。In order to improve fuel efficiency in marine diesel main engines, thermal power plants, etc., exhaust heat from exhaust gas is converted into exhaust gas economizers.
However, the outer heat transfer surfaces of these devices become contaminated with soot from the exhaust gas and adhering ash. In particular, in exhaust gas economizers for marine diesel main engines, the acid dew point range is 90° to 120°C.
Although heat recovery is being carried out, the quality of the fuel deteriorates.
酸露点以下の温度域における排熱回収のため。For waste heat recovery in the temperature range below the acid dew point.
排ガスエコノマイザ−の低温熱回収部には、未燃カーボ
ン、硫酸鉄、酸化バナジウム等や、燃料中の硫黄により
生成した硫酸と、この硫酸により燃料中の夾雑物が析出
し易いダストとなって酸露点以下の低温熱回収部分に付
着し、ドラフトロスの増加及び排熱回収率の低下等の問
題が生じている。この為、従来は排ガスエコノマイザ−
低温熱回収部の伝熱面の外表面付着物は。The low-temperature heat recovery section of the exhaust gas economizer contains unburned carbon, iron sulfate, vanadium oxide, etc., and sulfuric acid generated from sulfur in the fuel. It adheres to low-temperature heat recovery parts below the dew point, causing problems such as increased draft loss and decreased exhaust heat recovery rate. For this reason, conventional exhaust gas economizers
What is the deposit on the outer surface of the heat transfer surface of the low-temperature heat recovery section?
水洗法で除去している。It is removed by washing with water.
第２図は、この水洗要領を排ガスエコノマイザ−の構造
と共に示したものであり、第２図において、水洗水は、
弁５の取付けられた水洗用管６から散水され、予熱器管
２．低圧蒸発器管３等の低温熱回収部の付着物・２洗浄
除去し、排ガスエコノマイザ−ケーシング１内の下方に
位置する過熱器管４の下方に配置された洗浄廃液受樋７
．ホース８を経て廃液タンク９に溜められる。Figure 2 shows this flushing procedure together with the structure of the exhaust gas economizer. In Figure 2, the flushing water is
Water is sprayed from the flush pipe 6 to which the valve 5 is attached, and the preheater pipe 2. A cleaning waste liquid receiving trough 7 is arranged below the superheater pipe 4 located below the exhaust gas economizer casing 1 to remove deposits from the low-temperature heat recovery section such as the low-pressure evaporator pipe 3.
．． It passes through a hose 8 and is stored in a waste liquid tank 9.
予熱脂管２．低圧蒸発器管３の低温熱回収部の付着物の
約３０〜６０％は、水の浸透性の悪い不完全燃焼の生成
物である未燃カーボンや煤であり、又予熱器管２．低圧
蒸発器管３が排熱回収をよくするためフィン付きで、管
の上下方向の配列も、ガスの流れを阻害するように交互
に管の半径分だけずれているため、水洗水による未燃カ
ーボンや煤を主成分とする付着物への浸透・湿潤や洗浄
除去が行なわれないまま局部的な流れとなり、多くの水
洗水を使用しても効果的な付着物の除去ができない。Preheat fat pipe 2. Approximately 30 to 60% of the deposits on the low-temperature heat recovery section of the low-pressure evaporator tube 3 are unburned carbon and soot, which are products of incomplete combustion with poor water permeability, and on the preheater tube 2. The low-pressure evaporator tubes 3 are equipped with fins to improve waste heat recovery, and the vertical arrangement of the tubes is alternately shifted by the radius of the tubes to obstruct the flow of gas. The deposits, which are mainly composed of carbon and soot, are not penetrated, wetted, or washed away, resulting in localized flow, and even if a large amount of rinsing water is used, the deposits cannot be effectively removed.
又高圧水でゼット洗浄しても管の配列が上下に半径分だ
けずれているため外側の１〜２列の管が水洗できるだけ
で多量の水洗水と人工を要しても効果的な付着物の除去
ができない。Furthermore, even when jet cleaning is performed with high-pressure water, the arrangement of the pipes is shifted vertically by the radius, so only one or two rows of pipes on the outside can be washed with water, and even if a large amount of washing water and manual labor are required, it is not effective in removing deposits. cannot be removed.
本発明は、排熱回収装置の伝熱面に対し、炭酸ナトリウ
ム、炭酸水素ナトリウム等の水溶性の炭酸塩、又は重炭
酸塩の少なくとも一種を含む洗浄液をスプレーした後、
水洗浄を行う排熱回収装置の伝熱面付着物の除去法を提
供している。In the present invention, after spraying a cleaning liquid containing at least one type of water-soluble carbonate or bicarbonate such as sodium carbonate or sodium bicarbonate onto the heat transfer surface of an exhaust heat recovery device,
We provide a method for removing deposits on heat transfer surfaces of waste heat recovery equipment that performs water cleaning.
炭酸ナトリウムや炭酸水素ナトリウム等の炭酸塩又は重
炭酸塩の水溶液はアルカリ性であるため未燃分の多い付
着物中へもよく浸透し、また付着物中の遊離の硫酸及び
硫酸第一鉄と反斤。Aqueous solutions of carbonates or bicarbonates such as sodium carbonate or sodium bicarbonate are alkaline, so they penetrate well into deposits with a large amount of unburned matter, and they also react with free sulfuric acid and ferrous sulfate in deposits. A loaf.
して炭酸ガスを発生させる。to generate carbon dioxide gas.
ＮａｚＣＯａ＋Ｈ２ＳＯ４−＋ Ｎａ２ＳＯ４＋ＨｚＯ
＋ＣＯｚ↑２ＮａＨＣＯ３＋ Ｈ２ＳＯ４→Ｎａ ２
ＳＯ４＋ ２Ｈ２０＋ ２ＣＯ２↑この炭酸ガス発生時
の衝撃により付着物を剥離させ、液への溶解を容易なら
しめ、水洗浄で残存付着物を除去する。NazCOa+H2SO4-+ Na2SO4+HzO
+COz↑2NaHCO3+ H2SO4→Na 2
SO4+ 2H20+ 2CO2↑The impact generated when carbon dioxide gas is generated causes the deposits to be peeled off, making it easier to dissolve in the liquid, and the remaining deposits are removed by washing with water.
本発明の実施例を第１図によって説明する。 An embodiment of the present invention will be explained with reference to FIG.
第１図において付着物化学洗浄用タンク１ｏとポンプ１
１が弁１２を介して水洗用管６に連結されており、先ず
、化学洗浄液タンク１０に溶解した炭酸ナトリウム２０
％の水溶液を化学洗浄液タンク１０からポンプ１１を介
し、水洗用管６へ送り。In Figure 1, a tank 1o for chemical cleaning of deposits and a pump 1
1 is connected to a water washing pipe 6 via a valve 12, and first, sodium carbonate 20 dissolved in a chemical cleaning liquid tank 10 is added.
% aqueous solution is sent from the chemical cleaning liquid tank 10 to the water washing pipe 6 via the pump 11.
水洗用管６から散水して付着物を湿潤にさせ。Sprinkle water from the washing pipe 6 to moisten the deposits.
付着物と炭酸ナトリウムが反応し炭酸ガスを発生し、こ
の炭酸ガスにより付着物を剥離させると同時に反応生成
物を液に溶解させる。The deposits and sodium carbonate react to generate carbon dioxide gas, which removes the deposits and at the same time dissolves the reaction product in the liquid.
次いで、湿潤され剥離し易い状態となった残存付着物を
水洗で除去する。Next, the remaining deposits, which have become wet and easily peeled off, are removed by washing with water.
なお、液量は主機が１７，０ＯＯＰＳの排ガスエコノマ
イザでは約２ｒｔｔ”程度でよく、又、炭酸ナトリウム
に変え、炭酸水素ナトリウムも利用でき。In addition, the liquid amount may be about 2rtt'' for an exhaust gas economizer whose main engine is 17,000 OOPS, and sodium hydrogen carbonate can also be used instead of sodium carbonate.
さらには重炭酸塩も利用できる。これらの水溶液濃度は
、飽和濃度迄使用できる。Additionally, bicarbonate salts can also be used. These aqueous solution concentrations can be used up to saturation concentrations.
水洗のみでは除去困難な未燃カーボンからなる有機物・
煤等の付着物を、アルカリ性の条件下で伝熱面を腐食さ
せることなく、完全に除去することが可能であり、ドラ
フトロスの防止や排熱回収率が向上できる。Organic matter consisting of unburned carbon that is difficult to remove with water washing alone.
It is possible to completely remove deposits such as soot without corroding the heat transfer surface under alkaline conditions, and it is possible to prevent draft loss and improve the exhaust heat recovery rate.
又水洗水が従来の３０〜４０ ｒｎ”から１／２〜１／
３に低下でき、水洗に要する時間、費用も大幅に節約で
きる。Also, the washing water is 1/2 to 1/2 of the conventional 30 to 40 rn”.
3, and the time and cost required for washing can be significantly reduced.
第１図は本発明の排熱回収装置の伝熱面付着物の除去法
を示す系統図、第２図は従来法を示す系統図である。
１・・・排ガスエコノマイザ−ケーシング、２・・・予
熱器管、３・・・低圧蒸発器管、４・・・過熱器管。
６・・・水洗用管、９・・・廃液タンク、 １０・・・
化学洗浄液タンク”、Ｆｉｌ・・・ポンプ。FIG. 1 is a system diagram showing a method for removing deposits on a heat transfer surface of the exhaust heat recovery device of the present invention, and FIG. 2 is a system diagram showing a conventional method. DESCRIPTION OF SYMBOLS 1...Exhaust gas economizer casing, 2...Preheater tube, 3...Low pressure evaporator tube, 4...Superheater tube. 6...Washing pipe, 9...Waste liquid tank, 10...
Chemical cleaning liquid tank", Fil... pump.
Claims (1)
炭酸塩の少なくとも一種を含む洗浄液をスプレーした後
、水洗浄を行うことを特徴とする排熱回収装置の伝熱面
付着物の除去法。An exhaust heat recovery device with a heat transfer surface, characterized in that a cleaning liquid containing at least one type of water-soluble carbonate or bicarbonate is sprayed onto the heat transfer surface of the waste heat recovery device, and then water washing is performed. How to remove kimono.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11019586A JPS62266395A (en) | 1986-05-14 | 1986-05-14 | Method for removing adhesions on thermal conducting surface of waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11019586A JPS62266395A (en) | 1986-05-14 | 1986-05-14 | Method for removing adhesions on thermal conducting surface of waste heat recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62266395A true JPS62266395A (en) | 1987-11-19 |
Family
ID=14529458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11019586A Pending JPS62266395A (en) | 1986-05-14 | 1986-05-14 | Method for removing adhesions on thermal conducting surface of waste heat recovery device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62266395A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5924478A (en) * | 1997-05-08 | 1999-07-20 | Caterpillar Inc. | Radiator washing system and method |
| JP2011214731A (en) * | 2010-03-31 | 2011-10-27 | Takasago Thermal Eng Co Ltd | Cleaning method of heat exchanger |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5220175A (en) * | 1975-08-04 | 1977-02-15 | Takayoshi Nakanishi | Method of cleaning bath can |
| JPS548207A (en) * | 1977-06-20 | 1979-01-22 | Kurita Kasen Kk | Scale removing method |
| JPS5852494A (en) * | 1981-09-24 | 1983-03-28 | Nippon Steel Corp | Iron-zinc alloy plated steel material |
| JPS58221397A (en) * | 1982-06-18 | 1983-12-23 | Asahi Pen:Kk | Cleaning of bath boiler |
-
1986
- 1986-05-14 JP JP11019586A patent/JPS62266395A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5220175A (en) * | 1975-08-04 | 1977-02-15 | Takayoshi Nakanishi | Method of cleaning bath can |
| JPS548207A (en) * | 1977-06-20 | 1979-01-22 | Kurita Kasen Kk | Scale removing method |
| JPS5852494A (en) * | 1981-09-24 | 1983-03-28 | Nippon Steel Corp | Iron-zinc alloy plated steel material |
| JPS58221397A (en) * | 1982-06-18 | 1983-12-23 | Asahi Pen:Kk | Cleaning of bath boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5924478A (en) * | 1997-05-08 | 1999-07-20 | Caterpillar Inc. | Radiator washing system and method |
| JP2011214731A (en) * | 2010-03-31 | 2011-10-27 | Takasago Thermal Eng Co Ltd | Cleaning method of heat exchanger |
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