JPS6141400B2 - - Google Patents
Info
- Publication number
- JPS6141400B2 JPS6141400B2 JP4220078A JP4220078A JPS6141400B2 JP S6141400 B2 JPS6141400 B2 JP S6141400B2 JP 4220078 A JP4220078 A JP 4220078A JP 4220078 A JP4220078 A JP 4220078A JP S6141400 B2 JPS6141400 B2 JP S6141400B2
- Authority
- JP
- Japan
- Prior art keywords
- preheater
- air preheater
- washing device
- steam
- regenerative air
- 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
- 238000005406 washing Methods 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000001172 regenerating effect Effects 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 description 6
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 241000287227 Fringillidae Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 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
Landscapes
- Air Supply (AREA)
Description
【発明の詳細な説明】
本発明はボイラ設備の蒸気式空気予熱器等の二
次予熱器の水洗装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water washing device for a secondary preheater such as a steam-type air preheater for boiler equipment.
ボイラに使用される再生式空気予熱器は、ボイ
ラの排ガスの熱を回転エレメントを介して燃焼用
空気に伝達する熱交換器であるが、この再生式空
気予熱器エレメントの平均メタル温度が低いと、
排ガス中の亜硫酸ガスによる露点腐食のため装置
の寿命を短くしてしまう不都合があつた。このた
め、前記再生式空気予熱器エレメントの平均メタ
ル温度を亜硫酸ガスの露点温度以上に保つ必要が
あり、このための手段として蒸気式空気予熱器等
の二次予熱器が、再生式空気予熱器入口空気の加
熱用として設置される。これを第１図を用いてよ
り具体的に説明すると、矢印１は再生式空気予熱
器であつて、ダンパ６を通過した排気ガスダクト
１２内の排ガスＧの熱は回転エレメント２を介し
て空気ダクト１３を通過する燃焼用空気Ａに伝達
される。なお、加熱に供した排ガスＧはダンパ６
ａから排出され、加熱された燃焼用空気Ａはダン
パ６ｃから排出される。この方式の再生式空気予
熱器においては、排ガスＧの通過により、排ガス
中の灰分等が装置に付着するため、塵介の結りに
よるドラフトロスの増加が制限値を越えた場合
に、もしくは定期的に水洗を行う必要がある。３
は再生式空気予熱器水洗装置を示し、これを回転
エレメント２の排ガスダクト１２側の上下に設け
ることにより付着した灰分を水洗除去するもので
ある。すなわち、ボイラの運転を停止するか、ま
たは片方の再生式空気予熱器で運転を続けなが
ら、燃焼用空気入口ダンパ６ｂを閉じ、回転エレ
メント２を回転させながら、前記水洗装置３から
温水Ｗを該回転エレメント２に噴霧し灰分を除去
する。灰分除去に使用した水洗排水W′は排ガス
ダクト１２および燃焼用空気ダクト１３の下部に
設けたホツパ５ａおよび５ｂから排出される。こ
の場合、二次予熱器である蒸気式空気予熱器７が
回転エレメント２の下部に設置されているため、
水洗排水W′が回転エレメント２の回転にともな
い雫となつて前記蒸気式空気予熱器７に落下す
る。このため蒸気式空気予熱器７のフインチユー
ブの汚れ、詰り、腐食が発生し、蒸気式空気予熱
器７の性能低下、寿命短縮の原因となつていた。
このため、蒸気式空気予熱器を再生式空気予熱器
と離して設置したり、耐腐食性材料を使用する必
要が生じ、装置の効率低下をきたしたり、不経済
な設計となる等の欠点があつた。 The regenerative air preheater used in boilers is a heat exchanger that transfers the heat of the boiler exhaust gas to the combustion air through a rotating element.If the average metal temperature of this regenerative air preheater element is low, ,
There was an inconvenience that the life of the equipment was shortened due to dew point corrosion caused by sulfur dioxide gas in the exhaust gas. For this reason, it is necessary to maintain the average metal temperature of the regenerative air preheater element above the dew point temperature of sulfur dioxide gas, and as a means for this purpose, a secondary preheater such as a steam air preheater is used as a regenerative air preheater. Installed to heat the inlet air. To explain this more specifically with reference to FIG. The combustion air A passes through 13. Note that the exhaust gas G subjected to heating is
The heated combustion air A discharged from the damper 6c is discharged from the damper 6c. In this type of regenerative air preheater, as the exhaust gas G passes through, ash in the exhaust gas adheres to the device, so if the increase in draft loss due to dust particles exceeds the limit value, or if the It is necessary to wash with water. 3
1 shows a regenerative air preheater washing device, which is installed above and below the exhaust gas duct 12 side of the rotating element 2 to remove adhering ash by washing with water. That is, the combustion air inlet damper 6b is closed while the boiler operation is stopped, or the boiler is continued to operate with one regenerative air preheater, and the hot water W is supplied from the water washing device 3 while the rotating element 2 is rotated. The rotating element 2 is sprayed to remove ash. The washing waste water W' used for ash removal is discharged from hoppers 5a and 5b provided at the lower part of the exhaust gas duct 12 and the combustion air duct 13. In this case, since the steam air preheater 7, which is a secondary preheater, is installed below the rotating element 2,
As the rotating element 2 rotates, the washing waste water W' becomes drops and falls into the steam air preheater 7. As a result, the finch tube of the steam air preheater 7 becomes dirty, clogged, and corroded, which causes the performance of the steam air preheater 7 to deteriorate and its life to be shortened.
For this reason, it is necessary to install the steam air preheater separately from the regenerative air preheater and to use corrosion-resistant materials, which has disadvantages such as reducing the efficiency of the equipment and making the design uneconomical. It was hot.
本発明の目的は上記した従来技術の欠点をなく
し、蒸気式空気予熱器等の二次予熱器の伝熱面を
清浄に保つ装置を提供することにある。 SUMMARY OF THE INVENTION An object of the present invention is to eliminate the drawbacks of the prior art described above and to provide an apparatus for keeping the heat transfer surface of a secondary preheater, such as a steam air preheater, clean.
要するに本発明は、蒸気式空気予熱器等の二次
予熱器にスプレーノズルを有する水洗装置を設置
して、再生式空気予熱器の水洗終了後に二次予熱
器を単独で水洗できるようにしたものである。 In short, the present invention installs a water washing device having a spray nozzle on a secondary preheater such as a steam-type air preheater, so that the secondary preheater can be washed with water independently after washing the regenerative air preheater. It is.
次に本発明の実施例を第１図および第２図に基
づいて説明する。 Next, an embodiment of the present invention will be described based on FIGS. 1 and 2.
第１図において、二次予熱器である蒸気式空気
予熱器７が回転エレメント２の下側の空気ダクト
１３に設置してある。８はこの蒸気式空気予熱器
７の上部に設置したスプレー管であり、第２図に
示すように複数本（図示の場合は８本）設置して
ある。１０は前記スプレー管８に接続した管寄で
あり、９は水洗装置止弁である。また１１はスプ
レー用温水の流量調整用オリフイスである。以上
の構成を有する本発明水洗装置の使用例を次に示
す。先ず再生式空気予熱器水洗装置止弁９を開に
して、スプレー管８から温水Ｗを蒸気式空気予熱
器７に噴霧することにより、付着した灰分および
水洗汚水を洗浄除去する。この場合、オリフイス
１１をあらかじめ調整して、各スプレー管８から
温水Ｗが均一に噴霧されるようにしておく。 In FIG. 1, a steam air preheater 7, which is a secondary preheater, is installed in an air duct 13 below the rotating element 2. Reference numeral 8 designates spray pipes installed above the steam-type air preheater 7, and as shown in FIG. 2, a plurality of spray pipes (eight in the case shown) are installed. 10 is a header connected to the spray pipe 8, and 9 is a water washing device stop valve. Further, 11 is an orifice for adjusting the flow rate of hot water for spraying. An example of the use of the water washing device of the present invention having the above configuration will be shown below. First, the stop valve 9 of the regenerative air preheater washing device is opened and hot water W is sprayed from the spray pipe 8 onto the steam air preheater 7 to wash and remove adhering ash and washing waste water. In this case, the orifice 11 is adjusted in advance so that the hot water W is sprayed uniformly from each spray pipe 8.
本発明によれば蒸気式空気予熱器等の二次予熱
器の伝熱面を常に清浄に保つておくことができる
ので、汚れによる伝熱効率の低下、詰りによるド
ラフトロスの増加を防止することができる。 According to the present invention, the heat transfer surface of a secondary preheater such as a steam air preheater can be kept clean at all times, thereby preventing a decrease in heat transfer efficiency due to dirt and an increase in draft loss due to clogging. can.
さらに排ガス中の硫黄分による装置の腐食の問
題が生ぜず装置の寿命を延長でき経済的である。 Furthermore, the problem of corrosion of the equipment due to the sulfur content in the exhaust gas does not occur, and the life of the equipment can be extended, which is economical.
第１図は再生式空気予熱器に二次予熱器７を設
置した状態を示す再生式空気予熱器の系統概略
図、第２図は第１図のＡ−Ａ視図であつて、二次
予熱器水洗装置の平面図である。
１……再生式空気予熱器、２……回転エレメン
ト、３……再生式空気予熱器水洗装置、５ａ，５
ｂ……水洗排水ホツパ、６，６ａ，６ｂ，６ｃ…
…ダンパ、７……蒸気式空気予熱器（二次予熱
器）、８……スプレー管、９……水洗装置止弁、
１０……管寄、１１……流量調整用オリフイス、
１２……排ガスダクト、１３……空気ダクト、Ａ
……燃焼用空気、Ｇ……排ガス、Ｗ……温水、
W′……水洗排水。
FIG. 1 is a system schematic diagram of a regenerative air preheater showing a state in which a secondary preheater 7 is installed in the regenerative air preheater, and FIG. 2 is a view taken along line A-A in FIG. FIG. 3 is a plan view of the preheater washing device. 1... Regenerative air preheater, 2... Rotating element, 3... Regenerative air preheater water washing device, 5a, 5
b...Washing drainage hopper, 6, 6a, 6b, 6c...
... Damper, 7 ... Steam air preheater (secondary preheater), 8 ... Spray pipe, 9 ... Water washing device stop valve,
10... pipe head, 11... orifice for flow rate adjustment,
12...Exhaust gas duct, 13...Air duct, A
... Combustion air, G ... Exhaust gas, W ... Hot water,
W′...Washing drainage.
Claims (1)
て、該再生式空気予熱器の回転エレメントの下部
に設けた二次予熱器の上部にスプレー管を設置し
たことを特徴とする二次予熱器の水洗装置。 ２ 流量調整用オリフイスを有する複数のスプレ
ー管を管寄に連結してなることを特徴とする特許
請求の範囲第１項記載の二次予熱器の水洗装置。[Claims] 1. A regenerative air preheater equipped with a water washing device, characterized in that a spray pipe is installed above a secondary preheater provided at the bottom of a rotating element of the regenerative air preheater. Water washing device for secondary preheater. 2. A water washing device for a secondary preheater according to claim 1, characterized in that a plurality of spray pipes each having a flow rate adjusting orifice are connected to a header.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4220078A JPS54134860A (en) | 1978-04-12 | 1978-04-12 | Rinsing device for secondary preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4220078A JPS54134860A (en) | 1978-04-12 | 1978-04-12 | Rinsing device for secondary preheater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54134860A JPS54134860A (en) | 1979-10-19 |
| JPS6141400B2 true JPS6141400B2 (en) | 1986-09-13 |
Family
ID=12629359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4220078A Granted JPS54134860A (en) | 1978-04-12 | 1978-04-12 | Rinsing device for secondary preheater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54134860A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5044424A (en) * | 1980-12-19 | 1991-09-03 | Monro Richard J | Heat generator |
| US4413673A (en) * | 1982-10-18 | 1983-11-08 | Maigret Herve C De | Devices for supplying tube exchangers with cleaning bodies and for recovering these bodies |
| JPS6032690U (en) * | 1983-08-05 | 1985-03-06 | ガデリウス株式会社 | Heat transfer body cleaning device for rotary regenerative heat exchanger |
| CN112460627B (en) * | 2019-08-21 | 2023-03-17 | 南京兆能节能科技有限公司 | Rotary air preheater with cleaning function and cleaning method thereof |
-
1978
- 1978-04-12 JP JP4220078A patent/JPS54134860A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54134860A (en) | 1979-10-19 |
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