JPS58150800A - Recovery method for heat of waste gas - Google Patents
Recovery method for heat of waste gasInfo
- Publication number
- JPS58150800A JPS58150800A JP3260182A JP3260182A JPS58150800A JP S58150800 A JPS58150800 A JP S58150800A JP 3260182 A JP3260182 A JP 3260182A JP 3260182 A JP3260182 A JP 3260182A JP S58150800 A JPS58150800 A JP S58150800A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- water
- exhaust gas
- steam
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は各種の産業用脚ガスの保有する熱を回収する方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for recovering heat contained in various industrial leg gases.
〔発明の技術的背景及び背景技術の問題点〕従来、各種
の産業用脚ガスの保有する熱を回収することが省エネル
ギ一対策の１つとし【種々行なわれているが、高温の廃
ガスからの熱回収が主であり、２００℃以下の比較的低
温の廃ガスからの熱回収は十分に行なわれ【いるとは言
い離い。[Technical background of the invention and problems with the background art] Conventionally, one of the energy saving measures is to recover the heat held in various industrial leg gases. It is far from the case that heat recovery from relatively low-temperature waste gas of 200°C or less is carried out sufficiently.
その場内は、才１に、２００’ＣＩｉ度の廃ガスからの
熱回収は熱回収用の熱交換器が大盤となり設備費が割高
となること、才２に、Ｓガス中には一般に硫酸イオンや
亜硫酸イオン等が含まれているので１５０〜２００℃以
下に廃ガスを冷却すると・その一部がＩ！縮して熱交換
６に付着しそれを腐蝕損傷することになるからである。At the site, the first problem is that recovering heat from waste gas at 200'CIi degrees requires a large heat exchanger, making the equipment cost relatively high.Secondly, S gas generally contains sulfate ions. When the waste gas is cooled to below 150-200℃, some of it contains I! and sulfite ions. This is because it will shrink and adhere to the heat exchanger 6, causing corrosion and damage to it.
本発明は、簡単な方法により比較的低温の廃がスに適用
する場合においても前記従来技術のような欠点を生ずる
ことなく有効に熱を回収することができることを目的と
するものである。An object of the present invention is to be able to effectively recover heat by a simple method without causing the disadvantages of the prior art even when applied to relatively low temperature waste gas.
廃ガス中に水等グ）液体を供給して廃ガスの保育する熱
を利用し【該液体を蒸発させ廃ガスの相対湿度を増加さ
せ、次いで廃ガスと蒸気との温合した流体を熱交換器に
導入するとともに鋏熱交換器に更に別の低温流体を導入
させ、該熱交換響内において前記両流体な間接的に熱交
換させ、前記低１ｔｔｌｔ体により前配属合流体を冷却
することにより線流体内の蒸気を鍛縮させ、この凝縮熱
を前記低温流体により回収するようにした廃ガスの熱を
回収する方法に関する。By supplying a liquid (such as water) into the waste gas and utilizing the heat stored in the waste gas, the liquid is evaporated to increase the relative humidity of the waste gas, and then the heated fluid of the waste gas and steam is heated. At the same time as introducing into the exchanger, another low-temperature fluid is introduced into the scissor heat exchanger, and the two fluids indirectly exchange heat in the heat exchanger, and the preassigned confluent is cooled by the low 1ttlt body. The present invention relates to a method for recovering heat from waste gas, in which steam in a linear fluid is forged, and the heat of condensation is recovered by the low-temperature fluid.
〔発明の１！施例〕
次に比較的低温な廃ガスの熱回収にも適用できる本発明
の実施の一例を説明する。[Invention 1! Example] Next, an example of the implementation of the present invention, which can also be applied to heat recovery of relatively low-temperature waste gas, will be described.
図において、（１）はディーゼルエンジン、〜（２）は
被駆動体例えば発電機または被駆動体、（４）は熱交換
器、（７）はドレン水分離器、（８）は排水溝である。In the figure, (1) is a diesel engine, - (2) is a driven object such as a generator or driven object, (4) is a heat exchanger, (7) is a drain water separator, and (8) is a drain. be.
ディーイルエンジン（１１の排気ガスは排気管（３）及
び（３１を通つ【熱交換器（４１に導入されるが、この
連中の適所におい℃水供給管αりより流量調節弁拍動を
経て本を噴−する。噴霧された水は１状に排気ガス中に
１合し８００〜６００″Ｃ１１度の温度の排気ガスの保
有する廃熱により蒸発し、排気ガスの温度は１００℃前
後に低下し同時にその相対湿度が上昇する。Exhaust gas from the diesel engine (11) passes through the exhaust pipe (3) and (31) and is introduced into the heat exchanger (41). Then, the books are sprayed.The sprayed water is mixed into the exhaust gas and evaporated by the waste heat possessed by the exhaust gas with a temperature of 800 to 600 degrees Celsius, and the temperature of the exhaust gas is around 100 degrees Celsius. and at the same time its relative humidity increases.
噴霧される水の量は、流量調節弁αＤを適宜調節するこ
とにより排気ガスの相対湿度がはＰｔ１ｏ。The amount of water to be sprayed is determined by appropriately adjusting the flow rate control valve αD, so that the relative humidity of the exhaust gas is adjusted to Pt1o.
−になるように調節される。It is adjusted so that -.
排気ガスと蒸気との混合流体は次いで熱交換器゛（４）
の伝熱管Ｑ３に流入する。一方、低温例えば６０℃の水
が流入管（５）から熱交換器（４）内に流入し、伝熱管
ａ１内を流れる混合流体と間接的に熱交換し。The mixed fluid of exhaust gas and steam is then transferred to a heat exchanger (4).
flows into the heat exchanger tube Q3. On the other hand, water at a low temperature, for example, 60° C., flows into the heat exchanger (4) from the inflow pipe (5) and indirectly exchanges heat with the mixed fluid flowing in the heat transfer pipe a1.
混合流体中の蒸気は凝縮する。したがって−気ガスの保
有す４１１魅は凝縮潜熱の形で流入管（〜から流入した
水Ｋ１１ｌ＊されたことになり、加熱された水は６に出
管（８１から流出する。混合流体中の凝縮水はドレン水
分離ａｌｌ（７１で分離され排気ガスは大気排出管部よ
り放出され、またドレン水は排水ＩＩＩ（８１に排出さ
れる。The vapor in the mixed fluid condenses. Therefore, the 411 heat possessed by the air gas is converted into the water K11l* that flows in from the inlet pipe (~) in the form of latent heat of condensation, and the heated water flows out from the outlet pipe (81) into the mixed fluid. The condensed water is separated by the drain water separator ALL (71), the exhaust gas is discharged from the atmospheric discharge pipe section, and the drain water is discharged to the drain water III (81).
この実施例によれば、ディーイルエンジン（１）からの
排気ガスの保有する熱は鍍ガス中に噴霧された水の蒸発
潜熱とし【蒸気に移動し、更にこの蒸気の凝縮によって
凝縮潜熱として流入管（１５）から流入され養水によっ
て吸収されるから、熱伝達の形式が相の変化に基づく潜
熱熱伝達に変り、熱伝達係数が大幅に改・善される。According to this embodiment, the heat possessed by the exhaust gas from the diesel engine (1) is transferred to steam as the latent heat of vaporization of the water sprayed into the hot gas, and further flows in as latent heat of condensation by condensation of this steam. Since the water flows in from the pipe (15) and is absorbed by the nutrient water, the type of heat transfer changes to latent heat transfer based on phase change, and the heat transfer coefficient is greatly improved.
また、凝縮した水が排気ガス中の腐蝕性成分を吸収しこ
れを大量に希釈した状態で系外に排出するので、熱交換
ＩＢ（４１の損傷が線域されると共に排気ガス中に會ま
れる煤勢は凝縮した水に洗われることになるから、常に
清浄な伝熱蘭が保持される。In addition, the condensed water absorbs corrosive components in the exhaust gas and discharges them out of the system in a highly diluted state. Since the soot that flows is washed away by condensed water, a clean heat transfer field is maintained at all times.
更に、熱交換ＩＩ（４１に導入される排気ガスの相対温
度が嫌Ｐ１ｔｏｏ−であり、熱交換器（４１内はドレン
水分離器（７）及び大気排出管ａ・を介し【大気圧とな
っているから、１００℃より低温の水が流入管（５）か
ら流入することによりｆ１４合流体中の蒸気は直ちに凝
縮を開始することかでき、また温舎流体中には余分の水
分な會有しな、いから熱交換器（４）の伝熱面に蒸気の
接触が十分に行なわれ凝縮潜熱とし【得られるので蒸気
の状態変化がきわめて能率よく行なわれる。Furthermore, the relative temperature of the exhaust gas introduced into the heat exchanger II (41) is P1too-, and the inside of the heat exchanger (41 is at [atmospheric pressure] through the drain water separator (7) and the atmospheric discharge pipe a). Therefore, the steam in the F14 confluence can immediately start condensing when water with a temperature lower than 100°C flows in from the inlet pipe (5), and there is no excess moisture in the greenhouse fluid. However, since the steam is brought into sufficient contact with the heat transfer surface of the heat exchanger (4) and converted into latent heat of condensation, the state of the steam can be changed very efficiently.
本発明によれば次の効果が得られる。 According to the present invention, the following effects can be obtained.
すなわち、従来技ｌＩＫおい文は廃ガスと低温流体とを
気体熱交換するという単−椙での顕鶴鶴伝達方式であっ
たが、本発−は二相での潜熱熱伝達方式であるから熱伝
達係数が大幅に良くな番。In other words, the conventional technology IK Oibun used a single-layer heat transfer method that exchanged gas heat with waste gas and low-temperature fluid, but the present technology uses a two-phase latent heat transfer method. The heat transfer coefficient is significantly better.
また、凝縮した水が廃ガス中の硫酸イオンや亜硫酸イオ
ン等を吸収し、これを希釈した状態で系外に排出するた
め、熱交換器の損傷が場滅される。Furthermore, since the condensed water absorbs sulfate ions, sulfite ions, etc. in the waste gas and discharges them out of the system in a diluted state, damage to the heat exchanger is eliminated.
更に、廃ガス中に含まれるｌｊＩ形分（煤等）が凝縮水
に洗われるととにより伝熱ｗに付着せず、常に清浄な伝
鴎藺が維持できるので随交換響の熱伝達係数が使用中に
低下しない。Furthermore, when the ljI type components (soot, etc.) contained in the waste gas are washed away by the condensed water, they do not adhere to the heat transfer surface, and a clean heat transfer surface can be maintained at all times. Does not degrade during use.
【図面の簡単な説明】
図は本発明の一実施例の系統図である。
（１）・・ディーゼルエンジン、＋ａ＋ｔｓｉ・・廃ガ
スのための排気管、（４）・・随交換器、ｔ５ｊ −−
低温流体の流入管、（６）・・低−流体の流出管、Ｉ・
・液体としての水を供給する水供給管、ａ３・・伝熱管
。BRIEF DESCRIPTION OF THE DRAWINGS The figure is a system diagram of an embodiment of the present invention. (1)...Diesel engine, +a+tsi...Exhaust pipe for waste gas, (4)...Replacement exchanger, t5j --
Low-temperature fluid inflow pipe, (6) Low-temperature fluid outflow pipe, I.
・Water supply pipe that supplies water as a liquid, a3...Heat transfer tube.
Claims (1)
により鋏液体を蒸発させ廃ガスの相対湿度を増加させた
後、喝ガスと蒸気との混合流体を熱交換器に導入すると
ともに核熱交換器に更に別の低温流体を導入させ、該熱
交換器内において前記両流体を間接的に熱交換させ、前
記低温流体により前記混合流体を冷却し前記蒸気を凝縮
させる廃ガスの熱を回収する方法。After supplying liquid into the reactor and increasing the relative humidity of the waste gas by evaporating the liquid using the heat possessed by the waste gas, the mixed fluid of the reactor gas and steam is introduced into the heat exchanger and the reactor is heated. Another low-temperature fluid is further introduced into the heat exchanger, and the two fluids are indirectly heat-exchanged in the heat exchanger, and the heat of the waste gas is cooled by the low-temperature fluid to cool the mixed fluid and condense the steam. How to collect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3260182A JPH0238879B2 (en) | 1982-03-02 | 1982-03-02 | HAIGASUNONETSUOKAISHUSURUTOTOMONIFUSHOKUSEIGASUOJOKYOSURUHOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3260182A JPH0238879B2 (en) | 1982-03-02 | 1982-03-02 | HAIGASUNONETSUOKAISHUSURUTOTOMONIFUSHOKUSEIGASUOJOKYOSURUHOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58150800A true JPS58150800A (en) | 1983-09-07 |
| JPH0238879B2 JPH0238879B2 (en) | 1990-09-03 |
Family
ID=12363378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3260182A Expired - Lifetime JPH0238879B2 (en) | 1982-03-02 | 1982-03-02 | HAIGASUNONETSUOKAISHUSURUTOTOMONIFUSHOKUSEIGASUOJOKYOSURUHOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0238879B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791477A (en) * | 2014-02-25 | 2014-05-14 | 江苏智道工程技术有限公司 | Durable dew-blocking-prevention combined-type exhaust gas waste heat utilization device |
-
1982
- 1982-03-02 JP JP3260182A patent/JPH0238879B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791477A (en) * | 2014-02-25 | 2014-05-14 | 江苏智道工程技术有限公司 | Durable dew-blocking-prevention combined-type exhaust gas waste heat utilization device |
| CN103791477B (en) * | 2014-02-25 | 2015-07-15 | 江苏智道工程技术有限公司 | Durable dew-blocking-prevention combined-type exhaust gas waste heat utilization device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0238879B2 (en) | 1990-09-03 |
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