JPH08189622A - Semi-continuous operation type waste incinerator - Google Patents
Semi-continuous operation type waste incineratorInfo
- Publication number
- JPH08189622A JPH08189622A JP7002968A JP296895A JPH08189622A JP H08189622 A JPH08189622 A JP H08189622A JP 7002968 A JP7002968 A JP 7002968A JP 296895 A JP296895 A JP 296895A JP H08189622 A JPH08189622 A JP H08189622A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- heat storage
- air
- heat
- boiler
- 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
- 239000002699 waste material Substances 0.000 title abstract description 5
- 238000005338 heat storage Methods 0.000 claims abstract description 58
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000002485 combustion reaction Methods 0.000 claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 230000001172 regenerating effect Effects 0.000 claims description 4
- 238000004056 waste incineration Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 83
- 238000004140 cleaning Methods 0.000 abstract description 17
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 8
- 239000002918 waste heat Substances 0.000 abstract description 7
- 239000000446 fuel Substances 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 102220008421 rs193922681 Human genes 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Air Supply (AREA)
- Incineration Of Waste (AREA)
Abstract
(57)【要約】
【目的】 准連続運転式ごみ焼却炉から効率よく廃熱を
回収する。
【構成】 ごみ焼却炉本体１内の排ガス経路に水管式ボ
イラ部22を設け、休止中に起動されてボイラ部22の温度
低下を防止する加熱バーナー21を炉本体１の後壁に配置
し、一対２組の蓄熱体25A,25B と25C,25D の一方の組
に、ボイラ部22の入口から導入される排ガスと加熱バー
ナー21用の燃焼空気とを交互に導入して熱回収するとと
もに、他方の組にジェットパルスを供給して洗浄し、各
組の蓄熱体25A,25B と25C,25D を一定時間毎に切り換え
るバーナー制御装置34を設けた。
【効果】休止中のボイラーの温度低下を防止して露点腐
食をなくし、蓄熱体によりボイラ部入口の高温の排ガス
から熱回収して加熱バーナーの燃費を向上する。
(57) [Summary] [Purpose] Efficiently recover waste heat from a quasi-continuous operation type waste incinerator. [Structure] A water pipe type boiler unit 22 is provided in the exhaust gas passage in the refuse incinerator body 1, and a heating burner 21 that is activated during a rest to prevent the temperature of the boiler unit 22 from decreasing is arranged on the rear wall of the furnace body 1. Exhaust gas introduced from the inlet of the boiler section 22 and combustion air for the heating burner 21 are alternately introduced into one pair of the heat storage bodies 25A, 25B and 25C, 25D of one pair to recover heat. A burner controller 34 is provided for supplying a jet pulse to each group for cleaning, and switching the heat storage bodies 25A, 25B and 25C, 25D of each group at regular intervals. [Effect] The temperature drop of the boiler during rest is prevented, dew point corrosion is eliminated, and heat is recovered from the high-temperature exhaust gas at the inlet of the boiler by the heat storage body to improve the fuel efficiency of the heating burner.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、８〜１６時間／日程度
の稼働率で不連続に運転・休止を繰り返す准連続運転式
ごみ焼却設備に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a quasi-continuous operation type refuse incinerator in which operation and suspension are discontinuously repeated at an operating rate of about 8 to 16 hours / day.
【０００２】[0002]
【従来の技術】従来、８〜１６時間／日程度の稼働率で
不連続に運転・休止を繰り返す准連続運転式ごみ焼却設
備では、休止時に排ガス有害成分の結露によるボイラチ
ューブの露点腐食が激しいため、水管ボイラによる排ガ
スからの熱回収は行われておらず、そのため排ガスは、
冷却水の噴霧により冷却された後、集塵器を介して排出
されている。なお、煙道に温度低下が小さく露点腐食が
少ない空気を熱媒体とする小型の熱交換器を設けて熱回
収し、さらにこの熱媒体により水を加熱して温水を得る
熱回収装置を具備したものも見られるが、得られる温水
の温度が８０℃程度で、回収される熱量が少ない。2. Description of the Related Art Conventionally, in a semi-continuous operation type waste incineration facility in which operation and suspension are discontinuously performed at an operating rate of about 8 to 16 hours / day, dew point corrosion of a boiler tube is severe due to dew condensation of harmful components of exhaust gas during suspension. Therefore, heat recovery from the exhaust gas by the water tube boiler is not performed, and therefore the exhaust gas is
After being cooled by spraying cooling water, it is discharged through a dust collector. In addition, the flue was equipped with a small heat exchanger that uses air that has a small temperature drop and less dew point corrosion as a heat medium to recover heat, and that this heat medium heats water to obtain hot water. Although some can be seen, the temperature of the hot water obtained is about 80 ° C, and the amount of heat recovered is small.
【０００３】[0003]
【発明が解決しようとする課題】そのため、従来の准連
続式ごみ焼却炉では、利用可能な大量の廃熱を無駄に排
出していることになり、極めて熱回収効率が悪く、また
空気を熱媒体とする小型の熱交換器でも、充分な熱回収
が行われないという問題があった。Therefore, in the conventional quasi-continuous waste incinerator, a large amount of waste heat that can be used is wastefully discharged, resulting in extremely poor heat recovery efficiency and heat of air. Even a small heat exchanger used as a medium has a problem that sufficient heat recovery cannot be performed.
【０００４】そのため、本出願人は、特願平６−２０５
８４６号（平成６年８月３１日）の図２に示す実施例を
提案した。このごみ焼却設備は、休止中や立上げ時、低
品位ごみの焼却時に使用する加熱バーナーを炉本体に配
置するとともに、排ガス経路に水管式ボイラを配置し、
ボイラの下流側排ガス経路から排ガスの一部を蓄熱体に
導入して蓄熱体を加熱し、加熱された蓄熱体に加熱バー
ナーの燃焼用空気を導入して予熱するように構成したも
のである。Therefore, the applicant of the present invention filed Japanese Patent Application No. 6-205.
No. 846 (August 31, 1994), the example shown in FIG. 2 was proposed. This waste incineration facility has a heating burner in the furnace body that is used for incinerating low-grade waste during shutdown or startup, and a water pipe boiler in the exhaust gas path.
A part of the exhaust gas is introduced into the heat storage body from the downstream side exhaust gas passage of the boiler to heat the heat storage body, and the combustion air of the heating burner is introduced into the heated heat storage body to preheat the heat storage body.
【０００５】しかし、上記実施例では、ボイラ出口の排
ガス温度は約２５０℃で、蓄熱体を通過して排出される
排ガス温度が１７０℃と温度差が小さく、回収熱量＝
（蓄熱体入口排ガス温度−蓄熱体出口排ガス温度）×ガ
ス比熱（Ｃｐ＝０．３Kcal/ ℃m3）＝２４Kcal/ m3が少
ないという問題があった。ここで、排ガス温度が１７０
℃とされるのは、下流側排ガス経路に介在されるバグフ
ィルター式集塵器において、低温腐食の防止（１４０℃
以上確保）とろ布の維持（２００℃以下確保）のためで
ある。However, in the above embodiment, the temperature of the exhaust gas at the boiler outlet is about 250 ° C., the temperature of the exhaust gas discharged through the heat storage body is 170 ° C., and the temperature difference is small, and the recovered heat amount =
There was a problem that (heat storage body inlet exhaust gas temperature-heat storage outlet exhaust gas temperature) × gas specific heat (Cp = 0.3 Kcal / ° C. m 3 ) = 24 Kcal / m 3 was small. Here, the exhaust gas temperature is 170
℃ is used to prevent low temperature corrosion (140 ℃
This is to maintain the filter cloth (maintain above 200 ° C).
【０００６】本発明は、上記問題点を解決して、不連続
に運転・休止を繰り返すごみ焼却炉においても、ボイラ
の水管腐食を防止できて、高効率で排ガスから廃熱を有
効に回収できる准連続運転式ごみ焼却設備を提供するこ
とを目的とする。The present invention solves the above problems and can prevent the water pipe corrosion of the boiler even in a refuse incinerator in which the operation and stop are discontinuously repeated, and can efficiently recover the waste heat from the exhaust gas with high efficiency. The purpose is to provide a quasi-continuous operation type waste incineration facility.
【０００７】[0007]
【課題を解決するための手段】上記問題点を解決するた
めに本発明は、炉本体内の排ガス経路中に水管群を備え
たボイラ部を配設し、少なくともごみ焼却炉の休止中
に、このボイラ部を加熱する加熱バーナーを炉本体に設
け、この加熱バーナーに供給される燃焼空気を予熱する
蓄熱式の空気予熱装置を設け、この空気予熱装置を、少
なくとも一対の蓄熱体に、ボイラ部上流側の排ガスを排
ガス制御手段を介して導入する排ガス導入管をそれぞれ
接続するとともに、空気制御手段を介して前記加熱バー
ナーに燃焼用空気を導入する空気供給管をそれぞれ接続
して構成し、前記排ガス制御手段および空気制御手段を
操作して蓄熱体にそれぞれ導入される排ガスおよび燃焼
空気を一定時間毎に交互に切り換えるバーナー制御装置
を設けたものである。In order to solve the above problems, the present invention provides a boiler section provided with a water tube group in an exhaust gas passage in a furnace body, and at least during a rest of a refuse incinerator, A heating burner for heating the boiler part is provided in the furnace body, a regenerative air preheating device for preheating the combustion air supplied to the heating burner is provided, and the air preheating device is provided for at least one pair of heat storage bodies in the boiler part. The exhaust gas on the upstream side is connected to the exhaust gas introducing pipes through the exhaust gas control means, and the air supply pipes for introducing the combustion air into the heating burner is connected via the air control means. A burner control device is provided which operates the exhaust gas control means and the air control means to alternately switch the exhaust gas and the combustion air introduced into the heat storage body at regular intervals.
【０００８】また上記構成において、炉本体の加熱バー
ナーとボイラ部との間の炉壁に、前記蓄熱体を排ガス制
御手段を介して炉内と直接連通するように設置したもの
である。In the above construction, the heat storage body is installed on the furnace wall between the heating burner of the furnace body and the boiler section so as to directly communicate with the inside of the furnace through the exhaust gas control means.
【０００９】[0009]
【作用】上記構成によれば、ごみ焼却炉の運転中は、水
を熱媒体とするボイラ部により、排ガスから高い効率で
廃熱回収することができ、ごみ焼却炉の休止中は加熱バ
ーナーにより、ボイラ部を加熱して排ガス中の有害物質
の結露による露点腐食を防止することができる。そし
て、この加熱バーナーは、燃焼用空気を蓄熱式の空気予
熱器により、加熱バーナーのボイラ導入前の高温の排ガ
スを利用して蓄熱体により高効率で熱回収させて、その
熱により燃焼空気を炉内の温度近くまで加熱することが
できるので、加熱バーナーの燃料消費量を大幅に節減す
ることができ、運転コストを大幅に低減することができ
る。According to the above construction, during operation of the refuse incinerator, waste heat can be recovered from the exhaust gas with high efficiency by the boiler section using water as a heat medium, and by the heating burner while the refuse incinerator is stopped. By heating the boiler part, it is possible to prevent dew point corrosion due to dew condensation of harmful substances in the exhaust gas. Then, this heating burner uses a heat storage type air preheater for combustion air to recover heat with high efficiency by a heat storage body using high temperature exhaust gas before introducing the boiler of the heating burner, and the combustion air is heated by the heat. Since the temperature inside the furnace can be heated to near, the fuel consumption of the heating burner can be significantly reduced, and the operating cost can be significantly reduced.
【００１０】また空気予熱器の蓄熱体を炉本体に直接設
置することにより、高温の排ガスを流送する排ガスダク
トが不要になり、維持管理やヒートロスが無くなり、設
備コストを低減できる。Further, by directly installing the heat storage body of the air preheater in the furnace main body, an exhaust gas duct for feeding high temperature exhaust gas is not required, maintenance and heat loss are eliminated, and equipment cost can be reduced.
【００１１】[0011]
【実施例】以下、本発明に係るごみ焼却設備の第１実施
例を図１に基づいて説明する。休止と運転を繰り返す准
連続式のストーカ型焼却炉本体１には、上流側にごみ投
入ホッパー２が設けられるとともに、内部に傾斜式火格
子３を備え、火格子３の下流端には灰出口４が形成され
ている。またごみピット５から第１押込送風機６Ａによ
り第１空気吸引管７を介して吸引された燃焼空気を、直
接または蒸気式空気予熱器８を介してウインドボックス
から火格子３を通し燃焼室９に供給するように構成され
ている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the refuse incineration facility according to the present invention will be described below with reference to FIG. A semi-continuous stoker-type incinerator body 1 that repeats suspension and operation is provided with a dust input hopper 2 on the upstream side, an inclined grate 3 inside, and an ash outlet on the downstream end of the grate 3. 4 are formed. Further, the combustion air sucked from the dust pit 5 by the first forced air blower 6A through the first air suction pipe 7 is passed through the grate 3 from the windbox directly or through the steam air preheater 8 to the combustion chamber 9. Is configured to supply.
【００１２】この炉本体１内の排ガス経路には、廃熱回
収用の水管群を備えたボイラ部２２が設置されており、
ボイラ部２２から排出される排ガスは、排ガス管２３か
らバグフィルター１１に導入されて除塵された後、誘引
送風機１２により煙突１３から大気中に排出される。ま
た、炉本体１の灰出口４の上部後壁には、ごみ焼却炉の
休止時や立上時、低発熱ごみの焼却時に起動されてボイ
ラ部２２を加熱する加熱バーナー２１が設置され、この
加熱バーナー２１への燃焼空気供給経路に洗浄機能付の
蓄熱式空気予熱装置２４が付設されている。A boiler section 22 having a water pipe group for waste heat recovery is installed in the exhaust gas passage in the furnace body 1.
Exhaust gas discharged from the boiler unit 22 is introduced into the bag filter 11 from the exhaust gas pipe 23 to remove dust, and then discharged from the chimney 13 to the atmosphere by the induction blower 12. A heating burner 21 is installed on the upper rear wall of the ash outlet 4 of the furnace body 1 to heat the boiler part 22 when the refuse incinerator is at rest or when it is started up, or when incinerating low-heat waste. A regenerative air preheater 24 with a cleaning function is attached to the combustion air supply path to the heating burner 21.
【００１３】この空気予熱器２４は、一対２組の第１，
第２蓄熱体２５Ａ，２５Ｂと第３，第４蓄熱体２５Ｃ，
２５Ｄがそれぞれ配置され、排ガス導入管２６から排出
される排ガスにより加熱される。すなわち燃焼空気は、
基端部が炉本体１の燃焼室９に臨む天壁に接続された排
ガス導入管２６から第１，第２排ガス導入ファン２６
Ａ，２６Ｂにより第１，第２排ガス導入管２７Ａ，２７
Ｂに吸引され、さらに第１，第２排ガス導入管２７Ａ，
２７Ｂから排ガス制御手段の一例である第１〜第４排ガ
ス制御弁２８ａ〜２８ｄを介して第１〜第４蓄熱体２５
Ａ〜２５Ｄのどれかに送られる。そして、第１〜第４蓄
熱体２５Ａ〜２５Ｄ内の蓄熱媒体を加熱した排ガスは、
排ガス排出管２９から排ガス制御手段の一例である第５
〜第８排ガス制御弁２８ｅ〜２８ｈを介して排ガス管２
３の下流側に合流される。The air preheater 24 comprises a pair of first and second sets.
The second heat storage bodies 25A, 25B and the third and fourth heat storage bodies 25C,
25D are arranged and are heated by the exhaust gas discharged from the exhaust gas introducing pipe 26. That is, the combustion air is
From the exhaust gas introduction pipe 26 whose base end is connected to the ceiling wall facing the combustion chamber 9 of the furnace body 1 to the first and second exhaust gas introduction fans 26
The first and second exhaust gas introducing pipes 27A and 27 by A and 26B.
B is sucked into the first and second exhaust gas introducing pipes 27A,
27B via the 1st-4th exhaust gas control valves 28a-28d which are examples of an exhaust gas control means.
A to 25D. And the exhaust gas which heated the heat storage medium in the 1st-4th heat storage body 25A-25D,
From the exhaust gas discharge pipe 29, a fifth example of exhaust gas control means
-Exhaust gas pipe 2 through eighth exhaust gas control valves 28e-28h
It joins the downstream side of 3.
【００１４】一方、ごみピット５から第２押込送風機６
Ｂにより吸引された燃焼空気は、主空気供給管３０から
分岐され空気制御手段の一例である第１〜第４空気制御
弁３１ａ〜３１ｄを介して第１〜第４蓄熱体２５Ａ〜２
５Ｄに導入される。そして第１〜第４蓄熱体２５Ａ〜２
５Ｄ内の蓄熱媒体により予熱された燃焼空気は、空気制
御手段の一例である第５〜第８空気制御弁３１ｅ〜３１
ｈを介して空気送入管３２Ａ，３２Ｂに排出され、第
１，第２空気送入管３２Ａ，３２Ｂに介在された空気制
御手段の一例である第１，第２空気切換弁３３ａ，３３
ｂを介して加熱バーナー２１に供給されるように構成さ
れている。On the other hand, from the dust pit 5 to the second forced air blower 6
The combustion air sucked by B is branched from the main air supply pipe 30 and is passed through the first to fourth air control valves 31a to 31d, which are an example of air control means, to the first to fourth heat storage bodies 25A to 25D.
Introduced in 5D. And 1st-4th heat storage body 25A-2
The combustion air preheated by the heat storage medium in 5D is the fifth to eighth air control valves 31e to 31 which are an example of air control means.
First and second air switching valves 33a and 33 which are examples of air control means which are discharged to the air inlet pipes 32A and 32B via h and are interposed in the first and second air inlet pipes 32A and 32B.
It is configured to be supplied to the heating burner 21 via b.
【００１５】さらに、第１〜第４蓄熱体２５Ａ〜２５Ｄ
に送られる洗浄用のパルスジェット（洗浄用脈動空気）
は、洗浄空気ポンプ４１により洗浄空気供給管４２にお
くられ第１〜第４洗浄空気制御弁４３ａ〜４３ｄを介し
て第１〜第４蓄熱体２５Ａ〜２５Ｄに導入される。第１
〜第４蓄熱体２５Ａ〜２５Ｄ内の蓄熱媒体を洗浄後のパ
ルスジェットは、第５〜第８洗浄空気制御弁４３ｅ〜４
３ｈを介して洗浄空気排出管４４に排出され、さらにガ
ス排出管２９から排ガス管２３に送り出される。Further, the first to fourth heat storage bodies 25A to 25D
Pulse jet for cleaning (pulsing air for cleaning)
Is placed in the wash air supply pipe 42 by the wash air pump 41 and introduced into the first to fourth heat storage bodies 25A to 25D via the first to fourth wash air control valves 43a to 43d. First
~ The pulse jet after cleaning the heat storage medium in the fourth heat storage bodies 25A to 25D is the fifth to eighth cleaning air control valves 43e to 4
It is discharged to the cleaning air discharge pipe 44 via 3h, and is further sent from the gas discharge pipe 29 to the exhaust gas pipe 23.
【００１６】前記第１〜第４蓄熱体２５Ａ〜２５Ｄは同
一構成で、断熱ボックス内に隙間を通して排ガスや空気
を流送可能な粒状の蓄熱媒体が収容され、この蓄熱媒体
は、たとえばアルミナを焼成して直径２０〜５０ｍｍの
ボール状に形成されたものや、砕石状のアルミナ電鋳品
で２０〜３０ｍｍの不定形のものが使用される。そして
蓄熱媒体の種類や容量に応じて、バーナー制御装置３４
により、第１〜第８排ガス制御弁２８ａ〜２８ｈおよび
第１〜第８空気制御弁３１ａ〜３１ｈならびに第１，第
２空気切換弁３３ａ，３３ｂが操作されて一定時間ごと
に切り換えられ、各組の蓄熱体２５Ａ，２５Ｂまたは２
５Ｃ，２５Ｄの一方に排ガスが供給されて蓄熱媒体が加
熱され、他方の蓄熱媒体により燃焼空気が予熱される。
他方の組の休止中の蓄熱体２５Ａ，２５Ｂまたは２５
Ｃ，２５Ｄは、第１〜第８洗浄空気制御弁４３ａ〜４３
ｈが操作されて洗浄用のパルスジェットが供給され蓄熱
媒体が洗浄される。そして各組の気が供給される。ま
た、各組の蓄熱体２５Ａ，２５Ｂまたは２５Ｃ，２５Ｄ
は、一定の使用時間毎に切り換えられ交代で使用および
洗浄される。The first to fourth heat storage bodies 25A to 25D have the same structure, and a granular heat storage medium capable of sending exhaust gas or air through a gap is housed in the heat insulation box. The heat storage medium is, for example, alumina. Then, a ball-shaped product having a diameter of 20 to 50 mm or a crushed alumina electroformed product having an irregular shape of 20 to 30 mm is used. Then, according to the type and capacity of the heat storage medium, the burner control device 34
Thus, the first to eighth exhaust gas control valves 28a to 28h, the first to eighth air control valves 31a to 31h, and the first and second air switching valves 33a and 33b are operated and switched at regular time intervals. Heat storage body 25A, 25B or 2
The exhaust gas is supplied to one of 5C and 25D to heat the heat storage medium, and the other heat storage medium preheats the combustion air.
The other set of resting heat storage bodies 25A, 25B or 25
C and 25D are the first to eighth cleaning air control valves 43a to 43.
When h is operated, a pulse jet for cleaning is supplied to clean the heat storage medium. And each group's energy is supplied. In addition, the heat storage bodies 25A, 25B or 25C, 25D of each set
Are used at regular intervals of use and are alternately used and washed.
【００１７】上記実施例によれば、上記実施例によれ
ば、休止と運転を繰り返す准連続運転式ごみ焼却設備に
おいて、ごみ焼却炉の運転時には、水を熱媒体とするボ
イラ部２２により高効率で排ガスから廃熱回収すること
ができ、また休止時には、加熱バーナー２１によりボイ
ラ部２２の温度低下を防止し露点腐食を防止できる。こ
の時、ボイラ部２２の入口の排ガス温度は約９５０℃
で、蓄熱体を通過して排出される排ガス温度が１７０℃
と温度差が大きく、回収熱量＝（蓄熱体入口排ガス温度
−蓄熱体出口排ガス温度）×ガス比熱（Ｃｐ＝０．３Kc
al/ ℃m3）＝２３４Kcal/ m3と、先に提案したものより
飛躍的に回収熱量を多くできる。したがって、第１〜第
４蓄熱体３Ａ〜３Ｄにより、少ない燃費で加熱バーナー
２１を運転することができる。さらに、ごみ焼却炉の運
転時に、汚染された排ガスを使用するため、蓄熱媒体の
フィルタリング機能により、通常より多くの汚染物が付
着するおそれがあるが、これを休止中に蓄熱媒体がパル
スジェットで洗浄することができるので、蓄熱媒体の耐
用使用期間を長くすることができる。次に図２および図
３に基づいて第２実施例を説明する。なお、第１実施例
と同一の部材には同一符号を付し、説明は省略する。According to the above-described embodiment, according to the above-mentioned embodiment, in the quasi-continuous operation type refuse incinerator which repeats suspension and operation, when the refuse incinerator is in operation, the boiler section 22 using water as a heat medium provides high efficiency. Thus, waste heat can be recovered from the exhaust gas, and at the time of rest, the heating burner 21 can prevent the temperature of the boiler part 22 from decreasing and prevent dew point corrosion. At this time, the exhaust gas temperature at the inlet of the boiler part 22 is about 950 ° C.
And the temperature of the exhaust gas discharged through the heat storage body is 170 ° C.
The difference in temperature is large, and the amount of recovered heat = (heat storage unit inlet exhaust gas temperature-heat storage unit outlet exhaust gas temperature) x gas specific heat (Cp = 0.3 Kc
al / ℃ m 3 ) = 234 Kcal / m 3 , which means that the amount of recovered heat can be dramatically increased compared to the previously proposed one. Therefore, the heating burner 21 can be operated with less fuel consumption by the first to fourth heat storage bodies 3A to 3D. In addition, since the polluted exhaust gas is used during operation of the refuse incinerator, there is a possibility that more pollutants will adhere than usual due to the filtering function of the heat storage medium. Since it can be washed, the useful life of the heat storage medium can be extended. Next, a second embodiment will be described based on FIGS. 2 and 3. The same members as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
【００１８】上記第１実施例ではボイラ部２２の入口の
高温の排ガスを利用することにより、省エネルギー効果
が高まる反面、高温の排ガスを流送する主ガス導入管２
６および排ガス導入管２７Ａ，２７Ｂの維持管理が非常
に困難になるため、この第２実施例では、炉本体１に第
１〜第４蓄熱体２５Ａ〜２５Ｄを直接設置することによ
り、問題を解決したものである。In the first embodiment, the high temperature exhaust gas at the inlet of the boiler section 22 is used to enhance the energy saving effect, but the main gas introducing pipe 2 for sending the high temperature exhaust gas is sent.
6 becomes extremely difficult to maintain and manage the exhaust gas introduction pipes 27A and 27B, the problem is solved by directly installing the first to fourth heat storage bodies 25A to 25D in the furnace body 1 in the second embodiment. It was done.
【００１９】すなわち、この蓄熱式空気予熱装置５０
は、炉本体１の燃焼室９上方でボイラ部２２の入口に臨
む天壁１ａの四隅位置に４個の貫通孔５１Ａ〜５１Ｄを
形成するとともに、各貫通孔５１Ａ〜５１Ｄに排ガス制
御手段の一例である開閉ダンパやシャッターなどの開閉
装置５２ａ〜５２ｄを介して第１〜第４蓄熱体２５Ａ〜
２５Ｄがそれぞれ設置されている。これにより、従来に
必要であった主ガス導入管２６および排ガス導入管２７
Ａ，２７Ｂが削除できる。なお、排ガス導入ファンに代
えて排ガス排出管２９に排ガス吸引ファン５３が介在さ
れている。また、加熱バーナー２１に燃焼空気を送る空
気送入管５４には押込送風機５５が介在されている。That is, the regenerative air preheating device 50
Forms four through holes 51A to 51D at four corners of the ceiling wall 1a facing the inlet of the boiler portion 22 above the combustion chamber 9 of the furnace body 1, and also forms an example of exhaust gas control means in each of the through holes 51A to 51D. Through the opening / closing devices 52a-52d such as opening / closing dampers and shutters,
25D is installed respectively. As a result, the main gas introduction pipe 26 and the exhaust gas introduction pipe 27, which have been conventionally required,
A and 27B can be deleted. An exhaust gas suction fan 53 is provided in the exhaust gas exhaust pipe 29 instead of the exhaust gas introduction fan. Further, a forced air blower 55 is interposed in the air inlet pipe 54 that feeds the combustion air to the heating burner 21.
【００２０】上記構成において、第１実施例と同様にバ
ーナー制御装置３４により、開閉装置５２ａ〜５２ｄ、
第４〜第８排ガス制御弁２８ｅ〜２８ｈ、第１〜第８空
気制御弁３１ａ〜３１ｈおよび第１，第２空気切換弁３
３ａ，３３ｂが操作されて一定時間ごとに切り換えら
れ、各組の第１，第２蓄熱体２５Ａ，２５Ｂまたは第
３，第４蓄熱体２５Ｃ，２５Ｄの一方に、ボイラ部２２
の入口の高温の燃焼ガスが貫通孔５１Ａ〜５１Ｂから導
入されて蓄熱媒体が加熱されると同時に、他方に主空気
供給管３０から燃焼空気が導入されて蓄熱媒体の持つ潜
熱により予熱され、この燃焼空気が加熱バーナー２１に
供給される。また、第１，第２蓄熱体２５Ａ，２５Ｂと
第３，第４蓄熱体２５Ｃ，２５Ｄの各組は上記のように
交互に使用され、休止中のものには、洗浄空気ポンプ４
１から洗浄空気供給管４２および第１〜第４洗浄空気制
御弁４３ａ〜４３ｄを介してパルスジェット（洗浄用脈
動空気）が供給され、蓄熱媒体が洗浄される。In the above structure, the opening / closing devices 52a to 52d are controlled by the burner control device 34 as in the first embodiment.
Fourth to eighth exhaust gas control valves 28e to 28h, first to eighth air control valves 31a to 31h, and first and second air switching valves 3
3a and 33b are operated and switched at regular intervals, and one of the first and second heat storage bodies 25A and 25B or the third and fourth heat storage bodies 25C and 25D of each set is connected to the boiler unit 22.
At the same time, the high temperature combustion gas at the inlet of is introduced from the through holes 51A to 51B to heat the heat storage medium, and at the same time, the combustion air is introduced from the main air supply pipe 30 to be preheated by the latent heat of the heat storage medium. Combustion air is supplied to the heating burner 21. In addition, the first and second heat storage bodies 25A and 25B and the third and fourth heat storage bodies 25C and 25D are alternately used as described above.
1, a pulse jet (pulsating air for cleaning) is supplied from the cleaning air supply pipe 42 and the first to fourth cleaning air control valves 43a to 43d to clean the heat storage medium.
【００２１】したがって、第２実施例によれば、炉本体
１内のボイラ部２２の入口から高温の燃焼空気を吸引す
る特別仕様の排ガス導入管がなくなるので、設備コスト
を下げられるとともに配管およびダクトのメンテナンス
が容易となり、さらにヒートロスをなくすことができ
る。Therefore, according to the second embodiment, since the exhaust gas introduction pipe of the special specification for sucking the high temperature combustion air from the inlet of the boiler portion 22 in the furnace body 1 is eliminated, the equipment cost can be reduced and the pipe and the duct can be reduced. Maintenance is easy and heat loss can be eliminated.
【００２２】なお、本発明はストーカ型焼却炉に限ら
ず、流動床型焼却炉などの他の形式の焼却炉にも適用で
きる。The present invention is not limited to the stoker type incinerator, but can be applied to other types of incinerators such as a fluidized bed type incinerator.
【００２３】[0023]
【発明の効果】以上に述べたごとく本発明によれば、ご
み焼却炉の運転中は、水を熱媒体とするボイラ部によ
り、排ガスから高い効率で廃熱回収することができ、ご
み焼却炉の休止中は加熱バーナーにより、ボイラ部を加
熱して排ガス中の有害物質の結露による露点腐食を防止
することができる。そして、この加熱バーナーは、燃焼
用空気を蓄熱式の空気予熱器により、加熱バーナーのボ
イラ導入前の高温の排ガスを利用して蓄熱体により高効
率で熱回収させて、その熱により燃焼空気を炉内の温度
近くまで加熱することができるので、加熱バーナーの燃
料消費量を大幅に節減することができ、運転コストを大
幅に低減することができる。As described above, according to the present invention, during operation of the refuse incinerator, waste heat can be recovered from exhaust gas with high efficiency by the boiler section using water as a heat medium, and the refuse incinerator can be recovered. During the rest period, the heating burner can heat the boiler section to prevent dew point corrosion due to condensation of harmful substances in the exhaust gas. Then, this heating burner uses a heat storage type air preheater for combustion air to recover heat with high efficiency by a heat storage body using high temperature exhaust gas before introducing the boiler of the heating burner, and the combustion air is heated by the heat. Since the temperature inside the furnace can be heated to near, the fuel consumption of the heating burner can be significantly reduced, and the operating cost can be significantly reduced.
【００２４】また空気予熱器の蓄熱体を炉本体に直接設
置することにより、高温の排ガスを流送する排ガスダク
トが不要になり、維持管理やヒートロスが無くなり、設
備コストを低減できる。Further, by directly installing the heat storage body of the air preheater in the furnace main body, an exhaust gas duct for feeding high temperature exhaust gas is not required, maintenance and heat loss are eliminated, and equipment cost can be reduced.
【図１】本発明に係るごみ焼却設備の第１実施例を示す
構成図である。FIG. 1 is a configuration diagram showing a first embodiment of a refuse incineration facility according to the present invention.
【図２】本発明に係るごみ焼却設備の第２実施例を示す
構成図である。FIG. 2 is a configuration diagram showing a second embodiment of the refuse incineration facility according to the present invention.
【図３】同第２実施例の配管を示す要部平面図である。FIG. 3 is a plan view of an essential part showing a pipe of the second embodiment.
１ 炉本体 ９ 燃焼室 ２１ 加熱バーナー ２２ ボイラ部 ２３ 主排ガス導入管（排ガス導入管） ２４ 空気予熱装置 ２５Ａ〜２５Ｄ 第１〜第４蓄熱体 ２６Ａ，２６Ｂ 第１，第２排ガス導入ファン ２７Ａ，２７Ｂ 第１，第２排ガス導入管（排ガス導入
管） ２８ａ〜２８ｈ 第１〜第８排ガス制御弁（排ガス制御
手段） ２９ 排ガス排出管 ３０ 主空気供給管（空気供給管） ３１ａ〜３１ｈ 第１〜第８空気制御弁（空気制御手
段） ３２Ａ，３２Ｂ 第１，第２空気送入管（空気供給管） ３３ａ，３３ｂ 第１，第２空気切換弁 ３４ バーナー制御装置 ４１ 洗浄空気ポンプ ４２ 洗浄空気供給管 ４３ａ〜４３ｈ 第１〜第８洗浄空気制御弁 ４４ 洗浄空気排出管 ４１ 洗浄空気ポンプ ４２ 洗浄空気供給管 ４３ａ〜４３ｈ 第１〜第８洗浄空気制御弁 ５０ 空気予熱装置 ５１Ａ〜５１Ｄ 貫通孔 ５２ａ〜５２ｄ 開閉装置（排ガス制御手段） ５３ 排ガス吸引ファンDESCRIPTION OF SYMBOLS 1 furnace main body 9 combustion chamber 21 heating burner 22 boiler part 23 main exhaust gas introduction pipe (exhaust gas introduction pipe) 24 air preheating device 25A-25D 1st-4th heat storage body 26A, 26B 1st, 2nd exhaust gas introduction fan 27A, 27B 1st, 2nd exhaust gas introduction pipe (exhaust gas introduction pipe) 28a-28h 1st-8th exhaust gas control valve (exhaust gas control means) 29 exhaust gas discharge pipe 30 main air supply pipe (air supply pipe) 31a-31h 1st-first 8 air control valve (air control means) 32A, 32B first and second air inlet pipes (air supply pipes) 33a, 33b first and second air switching valves 34 burner control device 41 wash air pump 42 wash air supply pipe 43a-43h 1st-8th cleaning air control valve 44 Cleaning air discharge pipe 41 Cleaning air pump 42 Cleaning air supply pipe 43a-43h 1st-8th cleaning air control valve 5 0 Air preheating device 51A to 51D Through hole 52a to 52d Opening / closing device (exhaust gas control means) 53 Exhaust gas suction fan
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ２３Ｇ 5/50 ＺＡＢ Ｈ Ｊ Ｋ Ｆ２３Ｌ 15/02 ＺＡＢ Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI Technical display location F23G 5/50 ZAB H J K F23L 15/02 ZAB
Claims (2)
ボイラ部を配設し、 少なくともごみ焼却炉の休止中に、このボイラ部を加熱
する加熱バーナーを炉本体に設け、 この加熱バーナーに供給される燃焼空気を予熱する蓄熱
式の空気予熱装置を設け、 この空気予熱装置を、少なくとも一対の蓄熱体に、ボイ
ラ部上流側の排ガスを排ガス制御手段を介して導入する
排ガス導入管をそれぞれ接続するとともに、空気制御手
段を介して前記加熱バーナーに燃焼用空気を導入する空
気供給管をそれぞれ接続して構成し、 前記排ガス制御手段および空気制御手段を操作して蓄熱
体にそれぞれ導入される排ガスおよび燃焼空気を一定時
間毎に交互に切り換えるバーナー制御装置を設けたこと
を特徴とする准連続運転式ごみ焼却設備。1. A boiler section provided with a water tube group is provided in an exhaust gas path in a furnace body, and a heating burner for heating the boiler section is provided in the furnace body at least while the refuse incinerator is inactive. A regenerative air preheater for preheating the combustion air supplied to the burner is provided, and this air preheater introduces the exhaust gas on the upstream side of the boiler into the at least one pair of heat storage bodies via the exhaust gas control means. Each of which is connected to an air supply pipe for introducing combustion air into the heating burner through an air control means, and the exhaust gas control means and the air control means are operated to respectively introduce the heat storage body. A quasi-continuous operation type refuse incinerator, which is equipped with a burner control device that alternately switches the exhaust gas and combustion air that are generated at regular intervals.
炉壁に、前記蓄熱体を排ガス制御手段を介して炉内と直
接連通するように設置したことを特徴とする請求項１記
載の准連続運転式ごみ焼却設備。2. The heat storage body is installed on the furnace wall between the heating burner of the furnace body and the boiler section so as to directly communicate with the inside of the furnace via the exhaust gas control means. Semi-continuous operation type waste incineration facility.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7002968A JPH08189622A (en) | 1995-01-12 | 1995-01-12 | Semi-continuous operation type waste incinerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7002968A JPH08189622A (en) | 1995-01-12 | 1995-01-12 | Semi-continuous operation type waste incinerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08189622A true JPH08189622A (en) | 1996-07-23 |
Family
ID=11544182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7002968A Pending JPH08189622A (en) | 1995-01-12 | 1995-01-12 | Semi-continuous operation type waste incinerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08189622A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110600A (en) * | 2021-11-08 | 2022-03-01 | 西安交通大学 | Heat storage quick start type garbage pyrolysis gasification system and method thereof |
-
1995
- 1995-01-12 JP JP7002968A patent/JPH08189622A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110600A (en) * | 2021-11-08 | 2022-03-01 | 西安交通大学 | Heat storage quick start type garbage pyrolysis gasification system and method thereof |
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