JPS622671B2 - - Google Patents
Info
- Publication number
- JPS622671B2 JPS622671B2 JP55071731A JP7173180A JPS622671B2 JP S622671 B2 JPS622671 B2 JP S622671B2 JP 55071731 A JP55071731 A JP 55071731A JP 7173180 A JP7173180 A JP 7173180A JP S622671 B2 JPS622671 B2 JP S622671B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- heat exchanger
- exhaust
- recovery type
- condensate
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 238000011084 recovery Methods 0.000 claims description 28
- 239000007789 gas Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000002378 acidificating effect Effects 0.000 claims description 9
- 230000003472 neutralizing effect Effects 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000003546 flue gas Substances 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- -1 CaCO 3 Chemical class 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
- Details Of Fluid Heaters (AREA)
Description
【発明の詳細な説明】
本発明は、水加熱用の熱交換器において加熱作
用した後の燃焼排ガスを利用して前記水加熱用熱
交換器に対する供給水を予熱する排熱回収型熱交
換器、及び、そこで発生する高酸性ドレンの回収
装置を備えた湯沸し器に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides an exhaust heat recovery type heat exchanger that preheats water supplied to the water heating heat exchanger using combustion exhaust gas after heating in the water heating heat exchanger. , and a water heater equipped with a recovery device for highly acidic condensate generated therein.
上記構成の湯沸し器は、排熱の回収利用によつ
て、熱効率を向上し、燃料等、熱エネルギーの消
費量節減、排気温低下に伴なう排気設備の熱的耐
久性の増進等を図れる反面、排熱回収型熱交換器
をもたないものに比べて、その熱交換器の所での
凝縮によつて多量のドレンを発生し、かつ、その
ドレンに排気中のSOx，NOx等が溶け込んでPHで
２〜５程度の高い酸性度のドレン水となるため、
この高酸性ドレン水の後処理において、排水管路
の腐蝕などを生起し易い問題があつた。 The water heater with the above configuration improves thermal efficiency by recovering and using exhaust heat, reduces the consumption of fuel and other thermal energy, and improves the thermal durability of exhaust equipment as the exhaust temperature decreases. On the other hand, compared to a heat exchanger that does not have an exhaust heat recovery type heat exchanger, a large amount of condensate is generated due to condensation at the heat exchanger, and the condensate contains SO x and NO x in the exhaust gas. etc. dissolve and become highly acidic drain water with a pH of about 2 to 5.
In the post-treatment of this highly acidic drain water, there was a problem that corrosion of the drain pipes was likely to occur.
本発明は、かかる実情に鑑み、排熱回収によつ
て熱効率の向上、及びそれに付随するエネルギー
節減の効果等を図り乍ら、排熱回収に伴なう派生
的問題点であるドレン処理を効果的に行なえるよ
うにせんとする点に目的を有する。 In view of these circumstances, the present invention aims to improve thermal efficiency and concomitant energy savings through waste heat recovery, while also improving drain processing, which is a secondary problem associated with waste heat recovery. The purpose is to make it possible to carry out activities in a practical manner.
本発明による湯沸し器は、水加熱用の熱交換器
において加熱作用した後の燃焼排ガスを利用し
て、すなわち、排熱を回収利用して前記水加熱用
熱交換器に対する供給水を予熱する排熱回収型熱
交換器を設けるという構成により熱効率の向上を
図り、それに付随して省エネルギー、排気設備の
耐久性増進効果等を十分に達成し乍ら、そのよう
な構成故に排熱回収型熱交換器の所で多量に発生
されることになる高酸性ドレンの回収部又は排出
路に、回収したドレンの酸性度を中和する中和装
置を組込むことによつて、回収ドレンをPHで５〜
９前後のほぼ中性のものに改善して、ドレン排水
管路の腐蝕など、熱効率向上手段に伴なう派生的
問題点を簡単に、かつ、効果的に解消できるに至
つたのであり、これによつて、高熱効率湯沸器の
実用化、商品化を促進し得るに至つたものであ
る。 The water heater according to the present invention utilizes combustion exhaust gas after heating in a heat exchanger for water heating, that is, recovers and utilizes exhaust heat to preheat water supplied to the water heating heat exchanger. The structure of installing a heat recovery type heat exchanger improves thermal efficiency, and it also achieves sufficient effects such as energy saving and improving the durability of exhaust equipment. By incorporating a neutralization device that neutralizes the acidity of the collected condensate into the collection section or discharge path of the highly acidic condensate that is generated in large quantities at the vessel, the pH of the collected condensate can be reduced to 5 to 5.
By improving the temperature to a nearly neutral value of around 9, we were able to easily and effectively solve the problems that arise from thermal efficiency improvement measures, such as corrosion of drain pipes. As a result, we have been able to promote the practical application and commercialization of high thermal efficiency water heaters.
特に本発明の湯沸し器は、前記の燃焼排ガスの
流路の下流側に位置した排熱回収型熱交換器で予
熱された水が、上記流路の上流側に位置し、ガス
バーナに近い水加熱用熱交換器で加熱されたのち
給湯管から出ていく構成であるから、燃焼排ガス
の流れと水の流れとはいわば「向流」の状態にあ
る。従つて、やや低温化した排ガスで「冷たい」
水が加熱されることになり、一部の従来の技術に
おける「並流」式（特開昭50―158953号公報）に
おいて低温化した排ガスで「熱い」湯を加熱して
いる構成とは異なり、全体としての熱効率におい
て優れている。さらに、やや「低温化」した排ガ
スが排熱回収型熱交換器で冷たい水の管に接する
から、ドレンの発生量が比較的少なくなると共
に、主たる熱交換器のところでも、「予熱」され
た水と高温の排ガスとの接触であるから、上記並
流式の場合よりもドレン量は少なくなる。このよ
うに本発明では熱効率を高めながらドレン量を抑
制するとともに、ドレンの中和が簡便かつ確実に
行われる、という構成の湯沸し器が提供されるの
である。 In particular, in the water heater of the present invention, the water preheated by the exhaust heat recovery type heat exchanger located downstream of the flue gas flow path is heated upstream of the flow path, and the water is heated close to the gas burner. Since the hot water is heated in a heat exchanger and then exits from the hot water pipe, the flow of combustion exhaust gas and the flow of water are in a state of ``countercurrent'' so to speak. Therefore, the exhaust gas has a slightly lower temperature and is "cold".
The water is heated, unlike the configuration in which "hot" water is heated with cooled exhaust gas in the "parallel flow" method (Japanese Unexamined Patent Publication No. 158953/1983) in some conventional technologies. , has excellent overall thermal efficiency. Furthermore, since the somewhat "cooled" exhaust gas comes into contact with the cold water pipe in the exhaust heat recovery type heat exchanger, the amount of condensate generated is relatively small, and the main heat exchanger is also "preheated". Since water and high-temperature exhaust gas are in contact with each other, the amount of drainage is smaller than in the case of the above-mentioned parallel flow type. As described above, the present invention provides a water heater configured to suppress the amount of drain while increasing thermal efficiency, and neutralize the drain easily and reliably.
次に、本発明の実施の態様を例示図に基づいて
詳述すると、第１図で示すように、ガスバーナ４
の上部に、その両端を給水管５および給湯管７に
連通接続させた状態でフインチユーブ式の水熱交
換器６を配置し、この水熱交換器６の上部に、排
熱によつて給湯用水を予熱する排熱回収型のフイ
ンチユーブ式熱交換器１を設けるとともに、その
排熱回収型熱交換器１の下部に、そこで発生する
高酸性ドレンを受容する回収部２Ｂと回収したド
レン水を流下排出する排出路２Ａとから成るドレ
ン回収装置２を設け、かつ、前記排熱回収型熱交
換器１の上部に、排気速度を上げることで境膜伝
熱抵抗を減少して排熱回収の効率をも高めるべ
く、吸排式の強制排気フアン８を設けてある湯沸
し器において、前記排熱回収型熱交換器１を、銅
管および銅製フインの表面に錫やニツケルをメツ
キする或いは、デイツピングにより耐酸性の表面
被覆を施すとともに、前記ドレン回収装置２の排
出路２Ａにドレン酸性度を中和する装置３を組込
んだものであつて、その中和装置３として、例え
ば、第２図で明示の如く、前記ドレン排出路２Ａ
にフランジ接合可能な筒状容器３Ａ内に、マグネ
シウム、アルミニウム等の金属粒子、或いは、
CaCO3，Na2CO3，K2CO3等の粉状無機化合物、
更に、セメント等の固形中和物質ａを充填したも
のを使用する、又は、図示しないがPH改善用液剤
を添加するもの、或いは、前記回収部２Ｂにマグ
ネシウム合金やステンレスなどアルカリ性金属皿
を付設して回収ドレンを中和することなどが考え
られる。 Next, an embodiment of the present invention will be described in detail based on illustrative drawings. As shown in FIG.
A Finch-Ube type water heat exchanger 6 is placed above the water heat exchanger 6 with its both ends connected to the water supply pipe 5 and the hot water supply pipe 7. An exhaust heat recovery type heat exchanger 1 is provided to preheat the heat exchanger 1, and at the bottom of the exhaust heat recovery type heat exchanger 1, there is a recovery part 2B that receives the highly acidic drain generated therein and a recovery part 2B for receiving the highly acidic drain generated therein, and a recovery part 2B for receiving the highly acidic drain generated therein, and a recovery part 2B for receiving the highly acidic drain generated therein. A drain recovery device 2 consisting of a drain passage 2A is provided above the exhaust heat recovery type heat exchanger 1, and the efficiency of exhaust heat recovery is increased by increasing the exhaust speed to reduce film heat transfer resistance. In a water heater equipped with a suction-type forced exhaust fan 8, the exhaust heat recovery type heat exchanger 1 is made acid-resistant by plating the surfaces of the copper tubes and copper fins with tin or nickel, or by dipping. In addition, a device 3 for neutralizing drain acidity is incorporated in the discharge path 2A of the drain recovery device 2, and the neutralizing device 3 is, for example, as shown in FIG. As shown in the above, the drain discharge path 2A
Metal particles such as magnesium or aluminum, or
Powdered inorganic compounds such as CaCO 3 , Na 2 CO 3 , K 2 CO 3 ,
Furthermore, a method filled with solid neutralizing substance a such as cement, a method to which a PH improving liquid (not shown) is added, or an alkaline metal dish such as magnesium alloy or stainless steel is attached to the recovery section 2B. Possible methods include neutralizing the recovered condensate.
尚、第１図中、９はバーナコントローラ、１０
はガスガバナ、１１は水ガバナである。 In addition, in Fig. 1, 9 is a burner controller, 10
is a gas governor, and 11 is a water governor.
本発明は、排熱回収型熱交換器１を二段以上、
複数段に備えたものに適用実施することも良きこ
ともちろんである。 The present invention provides an exhaust heat recovery type heat exchanger 1 in two or more stages.
Of course, it is also possible to apply this method to a device equipped with multiple stages.
図面は本発明に係る湯沸し器の実施の態様を例
示し、第１図は全体の概略縦断面図、第２図は要
部の拡大縦断面図である。
１……排熱回収型熱交換器、２……ドレン回収
装置、２Ａ……ドレン排出路、２Ｂ……ドレン回
収部、３……中和装置、６……水加熱用の熱交換
器。
The drawings illustrate an embodiment of the water heater according to the present invention, with FIG. 1 being a schematic vertical cross-sectional view of the whole, and FIG. 2 being an enlarged vertical cross-sectional view of the main parts. 1... Exhaust heat recovery type heat exchanger, 2... Drain recovery device, 2A... Drain discharge path, 2B... Drain recovery section, 3... Neutralization device, 6... Water heating heat exchanger.
Claims (1)
後の燃焼排ガスを利用して前記水加熱用熱交換器
６に対する供給水を予熱する排熱回収型熱交換器
１を設け、その排熱回収型熱交換器１に対しここ
で発生する高酸性ドレンを回収する装置２を設け
た湯沸し器において、前記ドレン回収装置２の排
出路２Ａに回収したドレンの酸性度を中和する装
置３を組込んであると共に、前記の燃焼排ガスの
流路の下流側に位置した排熱回収型熱交換器１で
予熱された水が、上記流路の上流側に位置し、ガ
スバーナ４に近い水加熱用熱交換器６で加熱され
たのち給湯管７から出ていく構成であることを特
徴とする湯沸し器。 ２ 前記中和装置３が筒状容器３Ａ内に粒状又は
粉状の固形中和物質ａを充填したものから構成さ
れている特許請求の範囲第１項に記載の湯沸し
器。[Scope of Claims] 1. An exhaust heat recovery type heat exchanger 1 that preheats water supplied to the water heating heat exchanger 6 using combustion exhaust gas after heating in the water heating heat exchanger 6. In a water heater equipped with a device 2 for recovering highly acidic condensate generated in the exhaust heat recovery type heat exchanger 1, the acidity of the condensate collected in the discharge path 2A of the condensate recovery device 2 is moderated. In addition, water preheated by the exhaust heat recovery type heat exchanger 1 located downstream of the flue gas flow path is installed at the upstream side of the flow path, and the gas burner This water heater is characterized in that the water is heated by a water heating heat exchanger 6 similar to 4, and then exits from a hot water supply pipe 7. 2. The water heater according to claim 1, wherein the neutralization device 3 is constructed by filling a cylindrical container 3A with a granular or powdery solid neutralizing substance a.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7173180A JPS56168055A (en) | 1980-05-28 | 1980-05-28 | Hot water supplier |
| US06/448,276 US4444156A (en) | 1980-05-28 | 1982-12-09 | Water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7173180A JPS56168055A (en) | 1980-05-28 | 1980-05-28 | Hot water supplier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56168055A JPS56168055A (en) | 1981-12-24 |
| JPS622671B2 true JPS622671B2 (en) | 1987-01-21 |
Family
ID=13468954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7173180A Granted JPS56168055A (en) | 1980-05-28 | 1980-05-28 | Hot water supplier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56168055A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58168839A (en) * | 1982-03-29 | 1983-10-05 | Gasutaa:Kk | Water heater |
| JPH07167586A (en) * | 1993-12-13 | 1995-07-04 | Rinnai Corp | Heat exchanger |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50158953A (en) * | 1974-06-14 | 1975-12-23 | ||
| JPS5374110A (en) * | 1976-12-08 | 1978-07-01 | Ebara Mfg | Heat exchanger for paper making apparatus |
-
1980
- 1980-05-28 JP JP7173180A patent/JPS56168055A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50158953A (en) * | 1974-06-14 | 1975-12-23 | ||
| JPS5374110A (en) * | 1976-12-08 | 1978-07-01 | Ebara Mfg | Heat exchanger for paper making apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56168055A (en) | 1981-12-24 |
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