JPS58183996A - Chemical removal method of sulfur scale - Google Patents
Chemical removal method of sulfur scaleInfo
- Publication number
- JPS58183996A JPS58183996A JP6611382A JP6611382A JPS58183996A JP S58183996 A JPS58183996 A JP S58183996A JP 6611382 A JP6611382 A JP 6611382A JP 6611382 A JP6611382 A JP 6611382A JP S58183996 A JPS58183996 A JP S58183996A
- Authority
- JP
- Japan
- Prior art keywords
- sulfur
- scale
- hydrazine
- removal method
- chemical removal
- 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.)
- Granted
Links
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title claims description 20
- 229910052717 sulfur Inorganic materials 0.000 title claims description 18
- 239000011593 sulfur Substances 0.000 title claims description 17
- 238000000034 method Methods 0.000 title claims description 6
- 239000000126 substance Substances 0.000 title claims description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 41
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 22
- 239000004115 Sodium Silicate Substances 0.000 claims description 9
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 9
- 150000003464 sulfur compounds Chemical class 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 240000007124 Brassica oleracea Species 0.000 description 1
- 235000003899 Brassica oleracea var acephala Nutrition 0.000 description 1
- 235000012905 Brassica oleracea var viridis Nutrition 0.000 description 1
- BWGNESOTFCXPMA-UHFFFAOYSA-N Dihydrogen disulfide Chemical compound SS BWGNESOTFCXPMA-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004299 exfoliation Methods 0.000 description 1
- NOKUIIONGVTVQM-UHFFFAOYSA-N hydrazine sulfide Chemical compound SN=N NOKUIIONGVTVQM-UHFFFAOYSA-N 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は壁面に付着した単体イオウおよびイオウ化合物
を主体とするイオウスケールを安全かつ迅速に＃解剥離
するイオウスケールの化学的除去方法忙関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for chemically removing sulfur scale, which safely and rapidly detaches sulfur scale mainly consisting of simple sulfur and sulfur compounds attached to a wall surface.
地熱発電所の冷却水系統の機器、配管や温泉水を輸送す
る配管などのように、硫化水素を含む水で運転される機
器やその配管（材質はいずれも炭素鋼、不銹鋼、アルミ
ニウム合金）の壁面に硫化水素から生成した熱伝導率の
悪い本体イオウやイオウ化合物が付着し、それＫよって
伝導耐外やそのスケールによる配管などの閉塞も考えら
れる。Equipment and piping (all made of carbon steel, stainless steel, and aluminum alloy) that are operated with water containing hydrogen sulfide, such as cooling water system equipment and piping in geothermal power plants and piping that transports hot spring water, etc. Sulfur and sulfur compounds with poor thermal conductivity generated from hydrogen sulfide adhere to the wall surface, which may lead to conduction resistance and blockage of piping due to scale.
従って、この種のスケールが付着する機器の稼動率ｔ−
高めるためには、該スケールの除去が必要である。Therefore, the operating rate t-
In order to increase this, it is necessary to remove the scale.
しかしながら、単体イオウは化学的に非常に安定で、直
接溶解するためには取扱いの危険な二硫化炭ｇを虜用す
るしかない。そのため１機械的な手段で、除去する方法
が一般的であるが、該スケールが乾燥すると１強固なス
ケールとなり％機械的な除去法ですら困難になる。However, elemental sulfur is chemically very stable, and the only way to directly dissolve it is to use charcoal disulfide, which is dangerous to handle. Therefore, it is common to remove the scale by mechanical means, but when the scale dries, it becomes a hard scale, making even mechanical removal difficult.
本発明はＬ記の従来方法の欠点を解決し、電画に付着し
た単体イオウおよびイオウ化＆物を主体とするイオウス
ケールを安全かつ迅速に溶Ｓ＠砿するイオウスケールの
化学的除去方法を提供するもので、その要旨とするとこ
ろは、ヒドラジン５幅以上および水酸化ナトリウムまた
はメタケイ酸ナトリウム０．１〜１．０俤を含む水浴液
を壁面に付着した単体イオウおよびイオウ化合物を主体
とするイオウスケールに接触させること全特徴とするイ
オウスケールの化学的除去方法、にある。The present invention solves the drawbacks of the conventional methods listed in L and provides a method for chemically removing sulfur scale that safely and quickly dissolves the sulfur scale mainly composed of simple sulfur and sulfurized substances adhering to the electrolyte. The gist is that a water bath solution containing 5 or more hydrazine and 0.1 to 1.0 tons of sodium hydroxide or sodium metasilicate is attached to the wall, and the main substance is sulfur and sulfur compounds. A method for chemically removing sulfur scale, the entire feature of which is contacting the sulfur scale.
本発明で使用されるヒドラジン５憾以上及び水酸化ナト
リウムまたはメタケイ酸ナトリクム０．１〜１．０優を
含む水溶液の単体イオウおよびイオウ化合物を主体とす
るスケールを溶解剥離する反応機構について述べると、
次のごとくである。The reaction mechanism for dissolving and peeling off scale mainly composed of elemental sulfur and sulfur compounds in an aqueous solution containing 5 or more hydrazine and 0.1 to 1.0 or more sodium hydroxide or sodium metasilicate used in the present invention is as follows:
It is as follows.
（１） ヒドラジン（Ｎｗａ４）の作用ヒドラジンは
次の式で示すように、アルカリ溶液中で化学的に活性度
が高くなるので、これ會ス３Ｎ、Ｈ４＋２８→（Ｎｍ
Ｈａ ） ＠・Ｈ，８＋Ｎ、＋）ｉ、１１ケールの主成
分である単体イオウに反応させ、イオウ粒子表面をヒド
ラジン硫化物に変える。また。(1) Effect of hydrazine (Nwa4) Hydrazine becomes chemically more active in an alkaline solution, as shown by the following formula.
Ha) @・H,8+N,+)i,11 Reacts with elemental sulfur, which is the main component of kale, and changes the sulfur particle surface to hydrazine sulfide. Also.
このとき発生するＮ１ガスや■ＩＳＩ２ガスーズな４ｓ
盾に変った該スケールの崩壊を促進する。ヒドラジンの
緯加量が５ｃｓ−Ｊｃ満ではこの効果ははとんと１１い
。The N1 gas and ISI2 gas generated at this time are 4s
Promotes the collapse of the scale that has become a shield. This effect is extremely strong when the latitudinal addition of hydrazine is less than 5 cs-Jc.
（２） 水酸化ナトリウム（ＮａＯＨ）の作用水酸化
ナトリウムはヒドラジンの該スケール中への浸透性と還
元剥離効果を高め、水酸化す） ＩＪウムで浴けた硫化
物（ＮａＩ、Ｓ）かさらにイオウを浴つくる。(2) Effect of sodium hydroxide (NaOH) Sodium hydroxide increases the permeability of hydrazine into the scale and the reductive exfoliation effect, causing hydrazine to oxidize. Make a bath.
また系統内にアルミニウム合金で構成された機器や配管
がある場合、水酸化す） ＩＪウム代りＫ。In addition, if there are equipment or piping made of aluminum alloy in the system, use hydroxide instead of IJ.
メタケイ酸ナトリウム（Ｎａ、Ｓ ｉｏ、 ） ｆ Ｏ
，Ｉ Ｓｌ、０慢添加してもよめ。Sodium metasilicate (Na, S io, ) f O
, I Sl, 0 may be added slowly.
水酸化ナトリウム、メタケイ酸ナトリウムの添加量が０
．１優未満では上記の効果がなく、１％を越えると母材
の腐食が大きくなる。Added amount of sodium hydroxide and sodium metasilicate is 0
．． If it is less than 1%, the above effect will not be obtained, and if it exceeds 1%, corrosion of the base material will increase.
次に１本発明を実施例によってさらに具体的に説明する
。Next, the present invention will be explained in more detail with reference to Examples.
実施例
スケール付着量２０ Ｉｖ／ｅｒｒ？の実械配管を温度
２゜０Ｃで５％以上のヒドラジンおよび０．１〜１．０
１の水酸化す） ＩＪウムを含む＃液１ｃ２４時間＃！
漬装置処理すると、スケールは完全に除去できる。なお
。Example scale adhesion amount 20 Iv/err? 5% or more of hydrazine and 0.1 to 1.0
1 hydroxide) # solution containing IJium 1c 24 hours #!
The scale can be completely removed by soaking equipment. In addition.
ヒドラジン５優以上、水酸化ナトリウム０．１〜１．０
優の範囲内でのスケール除去率および母材の腐食率を第
１表に示す。Hydrazine 5 or more, sodium hydroxide 0.1-1.0
Table 1 shows the scale removal rate and base metal corrosion rate within the excellent range.
第１表
比較ガ
実ＩＩＡｆｉ１１と同一配管を５ＩＩＩ塩酸にインヒビ
ターを加えた溶液（ボイラーの蒸発管に付着したスクー
ルを除去するのに使用されているｔの）で夷總例と同一
条件で処理したところ、スケールのａｔ去率は３７％程
度で完全に除去することができなかった。Table 1 Comparison Example The same piping as IIAfi11 was treated with a solution of 5III hydrochloric acid and an inhibitor (a solution used to remove school deposits on boiler evaporation tubes) under the same conditions as in the sample. However, the scale removal rate was about 37% and could not be completely removed.
なお、比較例の２例の結果を次の第２表に示す。The results of two comparative examples are shown in Table 2 below.
第２！ｇ！ 上記の２ｆ１１ではスケールが溶解しなかった。Second! g! The scale did not dissolve in the above 2f11.
また、スケール除去時の母材腐食量について述べる。We will also discuss the amount of base metal corrosion during scale removal.
母材が炭素鋼、不銹＃については腐食量は〈０．０２〜
４” ｅ ４８ Ｈｒで無視できる種度であるが。When the base material is carbon steel and rust-free #, the amount of corrosion is <0.02 ~
4" e 48 Hr, the degree of severity is negligible.
アルミニウム合金については図に下すように、水酸化ナ
トリウムＳ度’ｉ ０．１％にすれば腐食量は０−１
”ｆ／ｃＮ” ａ Ｈｒとなる。この場合、水酸化ナト
リウムの代りに、メタケイ酸ナトリウムを使用すると、
腐食量ｔさらに小さくできる。For aluminum alloys, as shown in the figure, if the sodium hydroxide degree S'i is 0.1%, the amount of corrosion will be 0-1.
"f/cN" a Hr. In this case, if sodium metasilicate is used instead of sodium hydroxide,
The amount of corrosion t can be further reduced.
本発明の効果は次の通りである。The effects of the present invention are as follows.
（１３５１以上のヒドラジンおよび０．１〜１．０−の
水酸化ナトリウムを含む水溶液で、従来法では化学的に
除去することが困峻であったイオウスケールを完全に付
着面から溶解剥離して除去することかでざる。(This is an aqueous solution containing 1351 or more hydrazine and 0.1 to 1.0 - sodium hydroxide, which completely dissolves and peels off the sulfur scale, which was difficult to chemically remove with conventional methods, from the adhering surface.) There is no need to remove it.
（２）本発明の除去方法は常温で処理できかつ流速も必
要でない。(2) The removal method of the present invention can be processed at room temperature and does not require a flow rate.
（３） ４１１１成材料によって、水酸化ナトリウム
の代りに、メタケイ酸ナトリウムを用いることができる
。(3) Depending on the 4111 component, sodium metasilicate can be used instead of sodium hydroxide.
（４）洗浄時の構成材料の腐食量は無視できる種度で問
題ない。(4) The amount of corrosion of the constituent materials during cleaning is negligible and poses no problem.
（５）引火性のつよい二硫化炭素を使用する必要がない
ので、イオウスケール除去作業上の危険が少ない。(5) Since there is no need to use highly flammable carbon disulfide, there is less danger in the sulfur scale removal work.
添付図は０．１〜１．０嗟のＮａ０Ｈ（又は、メタケイ
−ナトリウム）と５９１ｋＮ＊Ｈａを含む溶液中でのＮ
ａＯＨ（又は、メタケイ酸ナトリウム）の濃度とアルミ
ニウム曾金の腐食率の関係を示すグラフ図。
曲−１はＮａＯＨの場合１曲線璽はメタケイ酸ナトリウ
ムの場合である。
濃度（τ）The attached diagram shows N in a solution containing 0.1 to 1.0 mo of NaOH (or sodium metasilicon) and 591 kN*Ha.
A graph diagram showing the relationship between the concentration of aOH (or sodium metasilicate) and the corrosion rate of aluminum alloy. Curve 1 is for NaOH, and Curve 1 is for sodium metasilicate. Concentration (τ)
Claims (1)
またはメタケイ酸ナトリウム０．１〜１．０１を含む水
＃准をＩｍｒｋＪに付着した単体イオウおよびイオウ化
合物を主体とするイオウスケールに接触させることｔ−
特徴とするイオウスケールの化学的除去方法０(1) Bringing water containing 5 or more hydrazine and 0.1 to 1.01 of sodium hydroxide or sodium metasilicate into contact with the sulfur scale mainly composed of simple sulfur and sulfur compounds attached to ImrkJ.
Characteristic chemical removal method of sulfur scale 0
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6611382A JPS58183996A (en) | 1982-04-20 | 1982-04-20 | Chemical removal method of sulfur scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6611382A JPS58183996A (en) | 1982-04-20 | 1982-04-20 | Chemical removal method of sulfur scale |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58183996A true JPS58183996A (en) | 1983-10-27 |
| JPH0159039B2 JPH0159039B2 (en) | 1989-12-14 |
Family
ID=13306500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6611382A Granted JPS58183996A (en) | 1982-04-20 | 1982-04-20 | Chemical removal method of sulfur scale |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58183996A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018115240A (en) * | 2017-01-17 | 2018-07-26 | 株式会社片山化学工業研究所 | Cleaning agent of sulfur scale and cleaning method of sulfur scale using the same |
| CN118495624A (en) * | 2024-06-07 | 2024-08-16 | 阳新弘盛铜业有限公司 | Gas-liquid reinforced vulcanization reaction equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03646U (en) * | 1989-05-24 | 1991-01-08 |
-
1982
- 1982-04-20 JP JP6611382A patent/JPS58183996A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018115240A (en) * | 2017-01-17 | 2018-07-26 | 株式会社片山化学工業研究所 | Cleaning agent of sulfur scale and cleaning method of sulfur scale using the same |
| CN118495624A (en) * | 2024-06-07 | 2024-08-16 | 阳新弘盛铜业有限公司 | Gas-liquid reinforced vulcanization reaction equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0159039B2 (en) | 1989-12-14 |
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