JP4558512B2 - White smoke prevention method - Google Patents

White smoke prevention method Download PDF

Info

Publication number
JP4558512B2
JP4558512B2 JP2005001175A JP2005001175A JP4558512B2 JP 4558512 B2 JP4558512 B2 JP 4558512B2 JP 2005001175 A JP2005001175 A JP 2005001175A JP 2005001175 A JP2005001175 A JP 2005001175A JP 4558512 B2 JP4558512 B2 JP 4558512B2
Authority
JP
Japan
Prior art keywords
exhaust gas
temperature
white smoke
chimney
gas
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 - Fee Related
Application number
JP2005001175A
Other languages
Japanese (ja)
Other versions
JP2006189195A (en
Inventor
聡 吉本
良二 鮫島
隆昭 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takuma KK
Original Assignee
Takuma KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Takuma KK filed Critical Takuma KK
Priority to JP2005001175A priority Critical patent/JP4558512B2/en
Publication of JP2006189195A publication Critical patent/JP2006189195A/en
Application granted granted Critical
Publication of JP4558512B2 publication Critical patent/JP4558512B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Chimneys And Flues (AREA)

Description

本発明は、主に都市ごみ等の廃棄物を焼却処理するごみ焼却プラント等に用いられるものであり、ごみ焼却プラントのごみ焼却炉で発生し、煙突から大気中へ放出される排ガスの白煙化を防止すると共に、排ガスが流れるガスダクトや鋼板製の煙突の低温腐食を防止し、且つこれらに要するエネルギーを削減できるようにした白煙防止方法に関するものである。   The present invention is mainly used in a waste incineration plant that incinerates waste such as municipal waste, etc., and is generated in a waste incinerator of a waste incineration plant and exhausted white smoke emitted from a chimney into the atmosphere The present invention relates to a white smoke prevention method capable of preventing low temperature corrosion of a gas duct through which exhaust gas flows and a chimney made of a steel sheet, and reducing energy required for these.

一般に、ごみ焼却炉から排出された排ガスは、ＨＣｌやＳＯｘ等の酸性ガスを含んでいるので、これら酸性ガスを処理するために２００℃以下まで減温し、ガスタクトに消石灰や重曹を吹き込んで排ガス中の酸性ガスと反応させる乾式ガス処理や排ガスを苛性ソーダ等のアルカリ剤で中和した洗浄水で洗浄する湿式ガス処理により酸性ガスを除去するようにしている。   In general, exhaust gas discharged from a waste incinerator contains acidic gases such as HCl and SOx. Therefore, in order to treat these acidic gases, the temperature is reduced to 200 ° C. or lower, and exhaust gas is blown into the gas tact by slaked lime or baking soda. Acid gas is removed by dry gas treatment for reacting with acid gas therein or wet gas treatment for washing exhaust gas with washing water neutralized with an alkaline agent such as caustic soda.

又、ごみ焼却炉から排出された排ガスは、水分を多量に含んでいるうえ、減温のために水噴霧を行うこともあるため、上述した乾式ガス処理や湿式ガス処理により排ガス中の酸性ガスを除去し、そのままの状態で煙突から大気中へ放出すると、排ガス中の水分が大気中で凝縮して白煙となる。
そのため、ごみ焼却プラントに於いては、ごみ焼却炉から煙突に至る排ガスの排出経路に白煙防止装置を設置し、減温した排ガスに加熱空気を混合したり、或いは減温した排ガスを再加熱器により加熱したりして排ガスの白煙化を防止するようにしている。 In addition, since the exhaust gas discharged from the waste incinerator contains a large amount of water and may be sprayed with water to reduce the temperature, the acid gas in the exhaust gas can be obtained by the dry gas treatment or wet gas treatment described above. If it is removed and discharged from the chimney to the atmosphere as it is, the moisture in the exhaust gas is condensed in the atmosphere to become white smoke.
Therefore, in a waste incineration plant, a white smoke prevention device is installed in the exhaust gas exhaust path from the waste incinerator to the chimney, and heated air is mixed with the reduced temperature exhaust gas, or the reduced temperature exhaust gas is reheated. The exhaust gas is heated to prevent the exhaust gas from becoming white smoke.

従来、煙突から放出される排ガスの白煙化を防止する方法としては、例えば特許文献１（特開平７−１２７８４０号公報）や特許文献２（実開平３−１２１３３０号公報）等に開示された方法が知られている。   Conventionally, methods for preventing white smoke from exhaust gas emitted from a chimney have been disclosed in, for example, Patent Document 1 (Japanese Patent Laid-Open No. 7-127840) and Patent Document 2 (Japanese Utility Model Laid-Open No. 3-121330). The method is known.

即ち、前者の方法は、図４に示す如く、焼却炉３０から煙突３５に至る排ガスＧの排出経路に空気予熱器３１、白煙防止用空気予熱器３２及び集塵機３３を設置すると共に、空気予熱器３１と白煙防止用空気予熱器３２との間に空気予熱器３１からの予熱空気Ａ1 を冷空気Ａ0 と熱交換して冷却するプレヒータ３４を設け、当該プレヒータ３４で予熱した空気Ａ2 を白煙防止用空気予熱器３２に供給してここで排ガスＧによって更に予熱し、この予熱した空気を白煙防止用加熱空気Ａ3 として集塵機３３の下流側位置で排ガスＧに混合するようにしたものである。この方法は、煙突３５から排出される排ガスＧの白煙化及び白煙防止用空気予熱器３２の低温腐食を夫々防止することができる。 That is, in the former method, as shown in FIG. 4, an air preheater 31, a white smoke prevention air preheater 32, and a dust collector 33 are installed in the exhaust gas G discharge path from the incinerator 30 to the chimney 35, and the air preheating is performed. The preheater 34 for cooling the preheated air A 1 from the air preheater 31 with the cold air A 0 is cooled between the air heater 31 and the air preheater 32 for preventing white smoke, and the air A preheated by the preheater 34 is provided. by supplying 2 to white smoke preventing air preheater 32 and further preheated by the exhaust gas G, where to mix the exhaust gas G at a position downstream of the dust collector 33 of this preheated air as the heated air a 3 for preventing white smoke It is a thing. This method can prevent the exhaust gas G discharged from the chimney 35 from becoming white smoke and low-temperature corrosion of the white smoke prevention air preheater 32, respectively.

又、後者の方法は、図示していないが、送風機からエアヒータを経た温風を排ガス路内の排ガスに吹き込むと共に、外気温度及び外気湿度と煙突入口部の排ガスの温度及び湿度とを夫々計測し、その計測結果に基づいて排ガス状態が白煙防止範囲に入るように排ガスに混合する温風量を調節するようにしたものである。この方法は、煙突から排出される排ガスの白煙化を防止することができると共に、送風機の消費電力が節約されて省エネルギーを図ることができる。   Although the latter method is not shown in the figure, hot air that has passed through the air heater from the blower is blown into the exhaust gas in the exhaust gas passage, and the outside air temperature and outside air humidity and the temperature and humidity of the exhaust gas at the chimney inlet are measured. Based on the measurement result, the amount of warm air mixed with the exhaust gas is adjusted so that the exhaust gas state falls within the white smoke prevention range. This method can prevent the exhaust gas discharged from the chimney from becoming white smoke and can save energy by saving power consumption of the blower.

しかし、前者の方法は、排ガスＧの白煙化防止及び白煙防止用空気予熱器３２の低温腐食防止を目的としているため、煙突３５内の排ガスＧの温度及び湿度を計測しておらず、外気条件（温度、風速）によっては煙突３５の排ガスＧと接触する鋼板製内筒の温度が低温腐食域（１５０℃以下）になる場合がある。又、後者の方法も、外気温度及び外気湿度と排ガスの温度及び湿度とを計測して排ガスの白煙化を防止するようにしているため、特に夏場など白煙防止条件が比較的緩い季節には排ガスの温度を極力低く抑える制御となり、煙突の鋼板製内筒の温度が低温腐食域になる場合がある。その結果、前記各方法は、煙突の鋼板製内筒が低温腐食を引き起こし、煙突の寿命が短くなると云う問題があった。
更に、前者の方法は、排ガスＧの白煙化防止と白煙防止用空気予熱器３２の低温腐食防止を行うものであり、又、後者の方法は、排ガスの白煙化防止と送風機の消費電力の節約を行うものであり、何れの方法も排ガスの白煙化防止と煙突の鋼板製内筒の低温腐食防止とエネルギーの削減とを同時に達成するものではなく、これらの全てを解決する方法は未だ提案されていないのが実情である。
特開平７−１２７８４０号公報 実開平３−１２１３３０号公報 However, since the former method is intended to prevent white smoke of the exhaust gas G and to prevent low temperature corrosion of the air preheater 32 for preventing white smoke, the temperature and humidity of the exhaust gas G in the chimney 35 are not measured. Depending on the outside air conditions (temperature, wind speed), the temperature of the steel plate inner cylinder in contact with the exhaust gas G of the chimney 35 may become a low temperature corrosion zone (150 ° C. or less). The latter method also measures the outside air temperature and humidity and the temperature and humidity of the exhaust gas to prevent the exhaust gas from becoming white smoke. Therefore, especially in summer, the white smoke prevention conditions are relatively mild. Is a control to keep the temperature of exhaust gas as low as possible, and the temperature of the chimney steel plate inner cylinder may become a low temperature corrosion zone. As a result, each of the above methods has a problem that the chimney steel plate inner tube causes low temperature corrosion and the chimney life is shortened.
Further, the former method is to prevent white smoke of the exhaust gas G and to prevent low temperature corrosion of the air preheater 32 for white smoke prevention, and the latter method is to prevent white smoke of the exhaust gas and consumption of the blower. This method saves electric power, and neither of these methods achieves the prevention of white smoke from exhaust gas, the prevention of low-temperature corrosion of the chimney steel plate inner cylinder, and the reduction of energy at the same time. Is not yet proposed.
JP-A-7-127840 Japanese Utility Model Publication No. 3-121330

本発明は、このような問題点に鑑みて為されたものであり、その目的は煙突から大気中へ放出される排ガスの白煙化を防止すると共に、排ガスが流れるガスダクトや煙突の鋼板製内筒等の低温腐食を防止し、且つこれらに要するエネルギーを削減できるようにした白煙防止方法を提供することにある。   The present invention has been made in view of such problems, and its purpose is to prevent white smoke from the exhaust gas discharged from the chimney into the atmosphere, and to make the inside of the gas duct in which the exhaust gas flows and the steel plate inside the chimney. An object of the present invention is to provide a white smoke prevention method capable of preventing low temperature corrosion of a cylinder and the like and reducing energy required for the corrosion.

上記目的を達成するために、本発明は、排ガスの排出経路に設置した白煙防止装置により、ガスダクト内を流れる排ガスに加熱空気を混合若しくはガスダクト内を流れる排ガスを再加熱し、煙突から大気中へ放出される排ガスの白煙化を防止するようにした白煙防止方法に於いて、煙突の排ガスと接触する鋼板製内筒の排ガス入口及び排ガス出口の鉄皮部分の温度を計測し、同時に外気温度及び外気湿度とガスダクト内を流れる排ガスの温度、水分、ＳＯｘ濃度及びＨＣｌ濃度とを夫々検出し、これらの検出結果に基づいて排ガスの白煙化及び煙突の鋼板製内筒の低温腐食を夫々防止できるように前記白煙防止装置を制御するようにしたことに特徴がある。   In order to achieve the above-mentioned object, the present invention uses a white smoke prevention device installed in an exhaust gas discharge path to mix heated air with exhaust gas flowing in the gas duct or reheat the exhaust gas flowing in the gas duct, In the white smoke prevention method that prevents the exhaust gas emitted to the white smoke from being measured, the temperature of the iron skin part of the steel plate inner cylinder that contacts the exhaust gas of the chimney is measured at the same time. The temperature, humidity, SOx concentration, and HCl concentration of the exhaust gas flowing in the gas duct are detected, respectively. Based on the detection results, the flue gas becomes white smoke and the low-temperature corrosion of the chimney steel plate inner cylinder. The present invention is characterized in that the white smoke prevention device is controlled so that each can be prevented.

本発明は、煙突の鋼板製内筒の排ガス入口及び排ガス出口の鉄皮部分の温度と、外気温度及び外気湿度と、ガスダクト内を流れる排ガスの温度、水分、ＳＯｘ濃度及びＨＣｌ濃度とを夫々検出し、これらの検出結果に基づいて排ガスの排出経路に設置した白煙防止装置を制御して排ガスに加熱空気を混合したり、或いは排ガスを再加熱したりして、排ガスの状態を白煙及び低温腐食の両方を防止できる状態にしているため、煙突から放出される排ガスの白煙化を防止することができると共に、煙突の鋼板製内筒の温度を低温腐食温度以上に保つ運転制御を行うことができ、煙突の長寿命化を図ることができる。
又、本発明は、煙突の鋼板製内筒が低温腐食を起こさないように排ガスに加熱空気を混合したり、排ガスを再加熱したりするようにしているため、煙突までのガスダクトやガスダクトに介設した再加熱器（例えば蒸気式加熱器）の低温腐食も防止することができる。
更に、本発明は、煙突の鋼板製内筒の鉄皮部分の温度、外気温度及び外気湿度、排ガスの温度、水分、ＳＯｘ濃度及びＨＣｌ濃度を夫々検出し、これらの検出結果に基づいて排ガスに混合する加熱空気の量や再加熱する排ガスの温度を制御するようにしているため、必要以上のエネルギーを使用すると云うことがなく、省エネルギー化を図ることができる。
このように、本発明は、白煙防止と装置保護（ガスダクトや蒸気式加熱器等の保護）と省エネルギー運転とを同時に達成することができる。 The present invention detects the temperature of the steel shell part of the exhaust pipe inlet and the exhaust gas outlet of the chimney steel plate inner cylinder, the outside air temperature and the outside air humidity, and the temperature, moisture, SOx concentration and HCl concentration of the exhaust gas flowing in the gas duct, respectively. Based on these detection results, the white smoke prevention device installed in the exhaust gas discharge path is controlled to mix the heated air with the exhaust gas, or to reheat the exhaust gas so that the state of the exhaust gas Since it is in a state that can prevent both low-temperature corrosion, it can prevent the flue gas emitted from the chimney from becoming white smoke, and perform operation control to keep the temperature of the chimney steel plate inner cylinder above the low-temperature corrosion temperature It is possible to extend the life of the chimney.
Further, the present invention mixes heated air with the exhaust gas or reheats the exhaust gas so as not to cause low-temperature corrosion of the steel plate inner cylinder of the chimney. Low temperature corrosion of the installed reheater (for example, a steam heater) can also be prevented.
Furthermore, the present invention detects the temperature, the outside air temperature and the outside air humidity, the temperature of the exhaust gas, the moisture, the SOx concentration and the HCl concentration of the steel shell portion of the steel tube inner cylinder of the chimney, respectively. Since the amount of heated air to be mixed and the temperature of the exhaust gas to be reheated are controlled, it is possible to save energy without using more energy than necessary.
Thus, the present invention can simultaneously achieve white smoke prevention, device protection (protection of gas ducts, steam heaters, etc.) and energy saving operation.

以下、本発明の実施の形態を図面に基づいて詳細に説明する。
図１は本発明の方法を実施するごみ焼却プラントの排ガス系統を示し、当該排ガス系統は、ストーカ式焼却炉や流動床式焼却炉等のごみ焼却炉（図示省略）の排ガス出口に接続された廃熱ボイラ（図示省略）と、廃熱ボイラにガスダクト１を介して接続され、排ガスＧを減温する減温塔２と、減温塔２にガスダクト１を介して接続され、排ガスＧ中のダスト類を除去するバグフィルタ３と、バグフィルタ３にガスダクト１を介して接続された誘引通風機４と、誘引通風機４にガスダクト１を介して接続された煙突５と、ごみ焼却炉から煙突５に至る排ガスＧの排出経路に設置され、白煙防止用空気予熱器７及び送風機８等から成る白煙防止装置６等から構成されており、煙突５の排ガスＧと接触する鋼板製内筒５ａの排ガス入口及び排ガス出口の鉄皮部分の温度と、外気温度及び外気湿度と、ガスダクト１内を流れる排ガスＧの温度、水分、ＳＯｘ濃度及びＨＣｌ濃度とを夫々検出し、これらの検出結果に基づいて排ガスＧの白煙化及び煙突５の鋼板製内筒５ａの低温腐食を防止できるように前記白煙防止装置６の送風機８を制御するようにしたものである。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an exhaust gas system of a waste incineration plant for carrying out the method of the present invention, and the exhaust gas system is connected to an exhaust gas outlet of a waste incinerator (not shown) such as a stoker type incinerator or a fluidized bed type incinerator. A waste heat boiler (not shown), a temperature reduction tower 2 connected to the waste heat boiler via the gas duct 1 and reducing the temperature of the exhaust gas G, and connected to the temperature reduction tower 2 via the gas duct 1 Bag filter 3 for removing dust, induction fan 4 connected to bag filter 3 via gas duct 1, chimney 5 connected to induction fan 4 via gas duct 1, and chimney from a waste incinerator A steel plate inner cylinder that is installed in the exhaust gas G discharge route up to 5 and is composed of the white smoke prevention device 6 including the white smoke prevention air preheater 7 and the blower 8 and the like, and is in contact with the exhaust gas G of the chimney 5 5a exhaust gas inlet and exhaust gas outlet The temperature of the iron skin part, the outside air temperature and the outside air humidity, and the temperature, moisture, SOx concentration and HCl concentration of the exhaust gas G flowing in the gas duct 1 are detected, respectively, and the white smoke of the exhaust gas G is detected based on these detection results. The blower 8 of the white smoke prevention device 6 is controlled so that the low temperature corrosion of the steel tube inner cylinder 5a of the chimney 5 can be prevented.

尚、白煙は、大気条件（温度及び湿度）と排ガスＧの状態（温度及び湿度）の関係に影響される。その関係をグラフ化すると、図２に示すグラフのようになる。
図２のグラフに於いて、Ｇ1 点及びＧ2 点は煙突５排出直後の排ガスＧの状態を示し、排ガスＧ1 及びＧ2 は夫々拡散しながら冷却され、直線的に大気状態であるＡ0 点へ近づいて行く。このとき、排ガスＧ1 は、大気状態であるＡ点までたどり着く間に水分飽和線に交差するため、ガス中の水分が飽和状態となり、気体の状態を保てなくなった分が凝縮して白煙となる。一方、排ガスＧ2 は、大気状態であるＡ0 点までたどり着くまでに水分飽和線と交差することがないため、ガス中の水分が気体の状態のまま大気拡散して凝縮することがないので、白煙を生じない。つまり、大気状態であるＡ点から水分飽和線に対する接線（この接線を白煙防止限界線と呼び、大気状態Ａ点の条件（気温及び絶対湿度）により変わる）を考え、排ガスＧの状態が白煙防止限界線より上にあるときに白煙が生じ、下にある場合には白煙が生じないことになる。従って、白煙を防止するためには、排ガスＧの状態（温度及び湿度）が白煙防止限界線の下になるようにすれば良い。 White smoke is affected by the relationship between atmospheric conditions (temperature and humidity) and the state of exhaust gas G (temperature and humidity). When the relationship is graphed, the graph shown in FIG. 2 is obtained.
In the graph of FIG. 2, points G 1 and G 2 indicate the state of the exhaust gas G immediately after the discharge of the chimney 5, and the exhaust gases G 1 and G 2 are cooled while diffusing, and are linearly in an atmospheric state A. Approaching 0 point. At this time, since the exhaust gas G 1 crosses the moisture saturation line while reaching the point A in the atmospheric state, the moisture in the gas becomes saturated, and the amount of gas that cannot be maintained is condensed and becomes white smoke It becomes. On the other hand, since the exhaust gas G 2 does not cross the moisture saturation line before reaching the A 0 point in the atmospheric state, the moisture in the gas does not diffuse and condense in the atmospheric state in the gaseous state. Does not produce white smoke. In other words, considering the tangent to the moisture saturation line from the point A in the atmospheric state (this tangent is called the white smoke prevention limit line and changes depending on the conditions (temperature and absolute humidity) of the atmospheric state A), the state of the exhaust gas G is white. When it is above the smoke prevention limit line, white smoke is generated, and when it is below, no white smoke is generated. Therefore, in order to prevent white smoke, the state (temperature and humidity) of the exhaust gas G should be below the white smoke prevention limit line.

又、低温腐食は、排ガスＧ中に含まれるＳＯｘやＨＣｌが露点温度以下になっている金属表面で凝縮し、硫酸や塩酸になって金属が侵食される現象を云う。ＳＯｘやＨＣｌの露点温度は、排ガスＧ中の水分量とＳＯｘ濃度又はＨＣｌ濃度に依存し、これらの値により変化する。従って、煙突５の鋼板製内筒５ａの低温腐食を防止するためには、排ガスＧの状態（温度及び湿度）を変えて鋼板製内筒５ａの温度が酸性ガスの露点温度以上に保たれるようにすれば良い。   The low temperature corrosion is a phenomenon in which SOx and HCl contained in the exhaust gas G condense on the metal surface having a dew point temperature or lower and become sulfuric acid or hydrochloric acid, and the metal is eroded. The dew point temperature of SOx or HCl depends on the amount of water in the exhaust gas G and the SOx concentration or HCl concentration, and varies depending on these values. Therefore, in order to prevent the low temperature corrosion of the steel plate inner cylinder 5a of the chimney 5, the state (temperature and humidity) of the exhaust gas G is changed and the temperature of the steel plate inner cylinder 5a is kept above the dew point temperature of the acid gas. You can do that.

前記排ガス系統に設置した白煙防止装置６は、減温塔２の上流側のガスダクト１に設けた白煙防止用空気予熱器７と、白煙防止用空気予熱器７に空気を供給する送風機８と、誘引通風機４の下流側のガスダクト１と白煙防止用空気予熱器７を接続する加熱空気供給管９等から構成されており、送風機８から白煙防止用空気予熱器７へ供給した空気をガスダクト１内の排ガスＧにより間接的に加熱すると共に、この加熱空気Ａを加熱空気供給管９から誘引通風機４の下流側のガスダクト１内に吹き込んで排ガスＧと混合し、排ガスＧの状態（温度及び湿度）を変えることによって、煙突５から放出される排ガスＧの白煙化を防止するようになっている。   The white smoke prevention device 6 installed in the exhaust gas system includes a white smoke prevention air preheater 7 provided in the gas duct 1 upstream of the temperature reducing tower 2 and a blower for supplying air to the white smoke prevention air preheater 7. 8 and a heated air supply pipe 9 that connects the gas duct 1 on the downstream side of the induction fan 4 and the white smoke prevention air preheater 7 and the like, and is supplied from the blower 8 to the white smoke prevention air preheater 7. The heated air is indirectly heated by the exhaust gas G in the gas duct 1 and the heated air A is blown into the gas duct 1 downstream of the induction fan 4 from the heated air supply pipe 9 and mixed with the exhaust gas G. By changing the state (temperature and humidity), white smoke of the exhaust gas G emitted from the chimney 5 is prevented.

そして、前記排ガス系統は、煙突５の排ガスＧと接触する鋼板製内筒５ａの排ガス入口及び排ガス出口の鉄皮部分の温度を計測し、同時に外気温度及び外気湿度とガスダクト１内を流れる排ガスＧの温度、水分、ＳＯｘ濃度及びＨＣｌ濃度とを夫々検出し、これらの検出結果に基づいて排ガスＧの状態が白煙防止条件及び煙突５の鋼板製内筒５ａの低温腐食防止条件の両方を満足するように前記白煙防止装置６の送風機８を制御するように構成されている。   The exhaust gas system measures the temperatures of the iron shell portions of the steel plate inner cylinder 5a in contact with the exhaust gas G of the chimney 5 and at the same time the exhaust gas G flowing in the gas duct 1 and the outside air temperature and outside air humidity. Temperature, moisture, SOx concentration, and HCl concentration are detected, and based on these detection results, the state of the exhaust gas G satisfies both the white smoke prevention condition and the low temperature corrosion prevention condition of the steel plate inner cylinder 5a of the chimney 5 Thus, the blower 8 of the white smoke prevention device 6 is controlled.

即ち、前記排ガス系統には、煙突５の排ガスＧと接触する鋼板製内筒５ａの排ガス入口の鉄皮部分の温度を計測する入口側温度検出器１０と、鋼板製内筒５ａの排ガス出口の鉄皮部分の温度を計測する出口側温度検出器１１と、バグフィルタ３の下流側のガスダクト１内を流れる排ガスＧの温度を検出する排ガス温度検出器１２と、バグフィルタ３の下流側のガスダクト１内を流れる排ガスＧ中の水分を検出する水分計１３と、バグフィルタ３の下流側のガスダクト１内を流れる排ガスＧ中のＳＯｘ濃度を検出するＳＯｘ濃度検出計１４と、バグフィルタ３の下流側のガスダクト１内を流れる排ガスＧ中のＨＣｌ濃度を検出するＨＣｌ濃度検出計１５と、外気の温度を計測する外気温度計１６と、外気の湿度を計測する外気湿度計１７とが夫々設けられている。
又、排ガス系には、各温度検出器１０，１１、排ガス温度検出器１２、水分計１３、ＳＯｘ濃度検出計１４、ＨＣｌ濃度検出計１５、外気温度計１６及び外気湿度計１７からの検出信号に基づいて白煙及び低温腐食の両方を防止できる排ガスＧの状態（温度及び湿度）を算出すると共に、排ガスＧの状態が白煙及び低温腐食を防止できる範囲に入るように白煙防止装置６の送風機８の回転数を算出する演算器１８と、演算器１８からの出力信号に基づいて送風機８の回転数を制御する制御器１９とが夫々設けられている。
尚、演算器１８には、白煙防止条件、排ガスＧ中の水分量とＳＯｘ濃度との関係、排ガスＧ中の水分量とＨＣｌ濃度との関係、ＳＯｘ濃度と露点温度との関係、ＨＣｌ濃度と露点温度の関係等が予め記憶されている。 That is, the exhaust gas system includes an inlet-side temperature detector 10 that measures the temperature of the iron shell portion of the exhaust gas inlet of the steel plate inner cylinder 5a that contacts the exhaust gas G of the chimney 5, and the exhaust gas outlet of the steel plate inner cylinder 5a. An outlet-side temperature detector 11 for measuring the temperature of the iron skin portion, an exhaust gas temperature detector 12 for detecting the temperature of the exhaust gas G flowing in the gas duct 1 on the downstream side of the bag filter 3, and a gas duct on the downstream side of the bag filter 3 1, a moisture meter 13 that detects moisture in the exhaust gas G that flows through the interior of the gas filter 1, a SOx concentration detector 14 that detects SOx concentration in the exhaust gas G that flows in the gas duct 1 downstream of the bag filter 3, and a downstream of the bag filter 3. The HCl concentration detector 15 for detecting the HCl concentration in the exhaust gas G flowing in the gas duct 1 on the side, the outside air thermometer 16 for measuring the temperature of the outside air, and the outside air hygrometer 17 for measuring the humidity of the outside air It is provided.
Further, in the exhaust gas system, detection signals from the temperature detectors 10, 11, the exhaust gas temperature detector 12, the moisture meter 13, the SOx concentration detector 14, the HCl concentration detector 15, the outside air thermometer 16 and the outside air hygrometer 17. The exhaust gas G state (temperature and humidity) capable of preventing both white smoke and low-temperature corrosion is calculated based on the above, and the white smoke prevention device 6 is set so that the state of the exhaust gas G falls within a range where white smoke and low-temperature corrosion can be prevented. A calculator 18 for calculating the rotational speed of the blower 8 and a controller 19 for controlling the rotational speed of the blower 8 based on an output signal from the calculator 18 are provided.
The calculator 18 includes white smoke prevention conditions, the relationship between the moisture content in the exhaust gas G and the SOx concentration, the relationship between the moisture content in the exhaust gas G and the HCl concentration, the relationship between the SOx concentration and the dew point temperature, and the HCl concentration. The relationship between the temperature and the dew point temperature is stored in advance.

次に、上述したごみ焼却プラントの排ガス系統の作用について説明する。
前記排ガス系統に於いては、ごみ焼却炉で発生した排ガスＧは、廃熱ボイラ及びエコノマイザ（何れも図示省略）により熱回収されてから減温塔２に入り、ここで更に減温されてからバグフィルタ３に流入し、当該バグフィルタ３により排ガスＧ中の煤塵が除去された後、誘引通風機４に誘引されて煙突５から大気中へ放出される。
このとき、白煙防止装置６により誘引通風機４の下流側のガスダクト１内を流れる排ガスＧに適宜の量の加熱空気Ａが混合されており、煙突５から放出される排ガスＧの白煙化と煙突５の鋼板製内筒５ａの低温腐食とが夫々防止されている。 Next, the operation of the exhaust gas system of the above-described waste incineration plant will be described.
In the exhaust gas system, the exhaust gas G generated in the waste incinerator is recovered by the waste heat boiler and the economizer (both not shown) and then enters the temperature reducing tower 2, where it is further reduced in temperature. After flowing into the bag filter 3 and removing the dust in the exhaust gas G by the bag filter 3, the bag filter 3 is attracted by the induction fan 4 and discharged from the chimney 5 to the atmosphere.
At this time, an appropriate amount of heated air A is mixed with the exhaust gas G flowing in the gas duct 1 on the downstream side of the induction fan 4 by the white smoke prevention device 6, and the exhaust gas G discharged from the chimney 5 becomes white smoke. And low temperature corrosion of the steel plate inner cylinder 5a of the chimney 5 are prevented.

即ち、前記排ガス系統に於いては、各温度検出器１０，１１、排ガス温度検出器１２、水分計１３、ＳＯｘ濃度検出計１４、ＨＣｌ濃度検出計１５、外気温度計１６及び外気湿度計１７により、煙突５の排ガスＧと接触する鋼板製内筒５ａの排ガス入口及び排ガス出口の鉄皮部分の温度と、外気温度及び外気湿度と、バグフィルタ３の下流側のガスダクト１内を流れる排ガスＧの温度、水分、ＳＯｘ濃度及びＨＣｌ濃度とが夫々検出されており、これらの検出信号が演算器１８に入力されている。
前記演算器１８では、各検出信号に基づいて白煙及び低温腐食の両方を防止できる排ガスＧの状態（温度及び湿度）が算出されると共に、排ガスＧの状態が白煙及び低温腐食を防止できる範囲に入るように白煙防止装置６の送風機８の回転数が算出され、その信号を制御器１９へ入力する。制御器１９は、演算器１８からの出力信号に基づいて送風機８の回転数を制御し、誘引通風機４の下流側のガスダクト１内を流れる排ガスＧに混合される加熱空気Ａの量を調整している。
これによって、排ガスＧの状態が白煙の発生及び煙突５の鋼板製内筒５ａの低温腐食を防止できる状態となる。 That is, in the exhaust gas system, the temperature detectors 10 and 11, the exhaust gas temperature detector 12, the moisture meter 13, the SOx concentration detector 14, the HCl concentration detector 15, the outside air thermometer 16, and the outside air hygrometer 17. , The temperature of the steel shell portion of the steel plate inner cylinder 5a in contact with the exhaust gas G of the chimney 5, the outside air temperature and the outside air humidity, and the exhaust gas G flowing in the gas duct 1 on the downstream side of the bag filter 3 The temperature, moisture, SOx concentration, and HCl concentration are detected, and these detection signals are input to the calculator 18.
The computing unit 18 calculates the state (temperature and humidity) of the exhaust gas G that can prevent both white smoke and low temperature corrosion based on each detection signal, and the state of the exhaust gas G can prevent white smoke and low temperature corrosion. The rotational speed of the blower 8 of the white smoke prevention device 6 is calculated so as to fall within the range, and the signal is input to the controller 19. The controller 19 controls the rotational speed of the blower 8 based on the output signal from the computing unit 18 and adjusts the amount of the heated air A mixed with the exhaust gas G flowing in the gas duct 1 on the downstream side of the induction fan 4. is doing.
Thereby, the state of the exhaust gas G becomes a state in which the generation of white smoke and the low temperature corrosion of the steel plate inner cylinder 5a of the chimney 5 can be prevented.

このように、前記排ガス系統に於いては、煙突５の鋼板製内筒５ａの排ガス入口及び排ガス出口の鉄皮部分の温度と、外気温度及び外気湿度と、ガスダクト１内を流れる排ガスＧの温度、水分、ＳＯｘ濃度及びＨＣｌ濃度とを夫々検出し、これらの検出結果に基づいて白煙防止装置６の送風機８を制御して排ガスＧに混合される加熱空気Ａの量を調整し、排ガスＧの状態を白煙及び低温腐食の両方を防止できる状態にしているため、煙突５から放出される排ガスＧの白煙化を防止することができると共に、煙突５の鋼板製内筒５ａの温度を低温腐食温度以上に保つ運転制御を行うことができ、煙突５の長寿命化を図ることができる。
又、煙突５の鋼板製内筒５ａが低温腐食を起こさないように排ガスＧに加熱空気Ａを混合するようにしているため、煙突５に至るまでのガスダクト１の低温腐食も防止することができる。
更に、煙突５の鋼板製内筒５ａの鉄皮部分の温度、外気温度及び外気湿度、排ガスＧの温度、水分、ＳＯｘ濃度及びＨＣｌ濃度を夫々検出し、これらの検出結果に基づいて排ガスＧに混合する加熱空気Ａの量を制御するようにしているため、必要以上のエネルギーを使用すると云うことがなく、省エネルギー化を図ることができる。 As described above, in the exhaust gas system, the temperature of the iron shell portions of the exhaust pipe inlet and the exhaust gas outlet of the steel tube inner cylinder 5 a of the chimney 5, the outside air temperature and the outside air humidity, and the temperature of the exhaust gas G flowing in the gas duct 1. , Moisture, SOx concentration and HCl concentration are detected, and the amount of heated air A mixed with the exhaust gas G is adjusted by controlling the blower 8 of the white smoke prevention device 6 based on the detection results. Since both the white smoke and the low temperature corrosion can be prevented, the exhaust gas G emitted from the chimney 5 can be prevented from becoming white smoke, and the temperature of the steel tube inner cylinder 5a of the chimney 5 can be reduced. It is possible to perform operation control that keeps the temperature lower than the low-temperature corrosion temperature, and to extend the life of the chimney 5.
Further, since the heated air A is mixed with the exhaust gas G so that the steel plate inner cylinder 5a of the chimney 5 does not cause low temperature corrosion, low temperature corrosion of the gas duct 1 up to the chimney 5 can also be prevented. .
Furthermore, the temperature, the outside air temperature and the outside air humidity, the temperature of the exhaust gas G, the moisture, the SOx concentration and the HCl concentration of the steel shell portion 5a of the steel plate inner cylinder 5a of the chimney 5 are detected, and the exhaust gas G is determined based on these detection results. Since the amount of the heated air A to be mixed is controlled, it is not said that excessive energy is used, and energy saving can be achieved.

図３は本発明の他の方法を実施するごみ焼却プラントの排ガス系統を示し、当該排ガス系統は、ストーカ式焼却炉や流動床式焼却炉等のごみ焼却炉（図示省略）の排ガス出口に接続された廃熱ボイラ（図示省略）と、廃熱ボイラにガスダクト１を介して接続され、排ガスＧを減温する減温塔２と、減温塔２にガスダクト１を介して接続され、排ガスＧ中のダスト類を除去するバグフィルタ３と、バグフィルタ３にガスダクト１を介して接続された誘引通風機４と、誘引通風機４にガスダクト１を介して接続された煙突５と、誘引通風機４の下流側のガスダクト１に設置され、蒸気式加熱器２０及び制御弁２１から成る白煙防止装置６等から構成されており、煙突５の排ガスＧと接触する鋼板製内筒５ａの排ガス入口及び排ガス出口の鉄皮部分の温度と、外気温度及び外気湿度と、ガスダクト１内を流れる排ガスＧの温度、水分、ＳＯｘ濃度及びＨＣｌ濃度とを夫々検出し、これらの検出結果に基づいて排ガスＧの白煙化及び煙突５の鋼板製内筒５ａの低温腐食を防止できるように前記白煙防止装置６の制御弁２１を制御するようにしたものである。   FIG. 3 shows an exhaust gas system of a waste incineration plant that implements another method of the present invention, and the exhaust gas system is connected to an exhaust gas outlet of a waste incinerator (not shown) such as a stoker type incinerator or a fluidized bed incinerator. A waste heat boiler (not shown) connected to the waste heat boiler via the gas duct 1, the temperature reducing tower 2 for reducing the temperature of the exhaust gas G, connected to the temperature reducing tower 2 via the gas duct 1, and the exhaust gas G Bag filter 3 for removing dusts therein, induction fan 4 connected to bag filter 3 via gas duct 1, chimney 5 connected to induction fan 4 via gas duct 1, and induction fan Exhaust gas inlet of a steel plate inner cylinder 5 a that is installed in the gas duct 1 on the downstream side of 4 and is composed of a white smoke prevention device 6 comprising a steam heater 20 and a control valve 21, etc. And the iron skin part of the exhaust gas outlet The temperature, the outside air temperature and the outside air humidity, and the temperature, moisture, SOx concentration and HCl concentration of the exhaust gas G flowing in the gas duct 1 are detected, respectively, and the white smoke of the exhaust gas G and the chimney 5 are detected based on these detection results. The control valve 21 of the white smoke prevention device 6 is controlled so that low temperature corrosion of the steel plate inner cylinder 5a can be prevented.

前記白煙防止装置６は、誘引通風機４と煙突５との間のガスダクト１に介設した蒸気式加熱器２０と、蒸気式加熱器２０に流入する蒸気Ｓの量を制御する制御弁２１とから構成されており、廃熱ボイラで発生した蒸気Ｓを蒸気式加熱器２０へ供給してガスダクト１内を流れる排ガスＧを間接的に加熱し、排ガスＧの状態（温度及び湿度）を変えることによって、煙突５から放出される排ガスＧの白煙化を防止するようになっている。   The white smoke prevention device 6 includes a steam heater 20 interposed in the gas duct 1 between the induction fan 4 and the chimney 5 and a control valve 21 that controls the amount of steam S flowing into the steam heater 20. The steam S generated in the waste heat boiler is supplied to the steam heater 20 to indirectly heat the exhaust gas G flowing in the gas duct 1 to change the state (temperature and humidity) of the exhaust gas G. Thus, the exhaust gas G discharged from the chimney 5 is prevented from becoming white smoke.

そして、前記排ガス系統には、煙突５の排ガスＧと接触する鋼板製内筒５ａの排ガス入口の鉄皮部分の温度を計測する入口側温度検出器１０と、鋼板製内筒５ａの排ガス出口の鉄皮部分の温度を計測する出口側温度検出器１１と、バグフィルタ３の下流側のガスダクト１内を流れる排ガスＧの温度を検出する排ガス温度検出器１２と、バグフィルタ３の下流側のガスダクト１内を流れる排ガスＧ中の水分を検出する水分計１３と、バグフィルタ３の下流側のガスダクト１内を流れる排ガスＧ中のＳＯｘ濃度を検出するＳＯｘ濃度検出計１４と、バグフィルタ３の下流側のガスダクト１内を流れる排ガスＧ中のＨＣｌ濃度を検出するＨＣｌ濃度検出計１５と、外気の温度を計測する外気温度計１６と、外気の湿度を計測する外気湿度計１７とが夫々設けられている。
又、排ガス系には、各温度検出器１０，１１、排ガス温度検出器１２、水分計１３、ＳＯｘ濃度検出計１４、ＨＣｌ濃度検出計１５、外気温度計１６及び外気湿度計１７からの検出信号に基づいて白煙及び低温腐食の両方を防止できる排ガスＧの状態（温度及び湿度）を算出すると共に、排ガスＧの状態が白煙及び低温腐食を防止できる範囲に入るように白煙防止装置６の制御弁２１の開閉度合いを算出する演算器１８と、演算器１８からの出力信号に基づいて制御弁２１を制御する制御器１９とが夫々設けられている。 The exhaust gas system includes an inlet-side temperature detector 10 that measures the temperature of the iron shell portion of the exhaust gas inlet of the steel plate inner cylinder 5a that is in contact with the exhaust gas G of the chimney 5, and the exhaust gas outlet of the steel plate inner cylinder 5a. An outlet-side temperature detector 11 for measuring the temperature of the iron skin portion, an exhaust gas temperature detector 12 for detecting the temperature of the exhaust gas G flowing in the gas duct 1 on the downstream side of the bag filter 3, and a gas duct on the downstream side of the bag filter 3 1, a moisture meter 13 that detects moisture in the exhaust gas G that flows through the interior of the gas filter 1, a SOx concentration detector 14 that detects SOx concentration in the exhaust gas G that flows in the gas duct 1 downstream of the bag filter 3, and a downstream of the bag filter 3. An HCl concentration detector 15 for detecting the HCl concentration in the exhaust gas G flowing in the gas duct 1 on the side, an outside air thermometer 16 for measuring the temperature of the outside air, and an outside air hygrometer 17 for measuring the humidity of the outside air. People are provided.
Further, in the exhaust gas system, detection signals from the temperature detectors 10, 11, the exhaust gas temperature detector 12, the moisture meter 13, the SOx concentration detector 14, the HCl concentration detector 15, the outside air thermometer 16 and the outside air hygrometer 17. The exhaust gas G state (temperature and humidity) capable of preventing both white smoke and low-temperature corrosion is calculated based on the above, and the white smoke prevention device 6 is set so that the state of the exhaust gas G falls within a range where white smoke and low-temperature corrosion can be prevented. A calculator 18 for calculating the degree of opening and closing of the control valve 21 and a controller 19 for controlling the control valve 21 based on an output signal from the calculator 18 are provided.

前記排ガス系統は、図１に示す排ガス系統と同様の作用効果を奏することができる。然も、排ガスＧを蒸気Ｓにより加熱するようにしているため、煙突５から放出される排ガスＧの量を減少させることができる。   The exhaust gas system can achieve the same effects as the exhaust gas system shown in FIG. However, since the exhaust gas G is heated by the steam S, the amount of the exhaust gas G released from the chimney 5 can be reduced.

本発明の方法を実施するごみ焼却プラントの排ガス系統図である。It is an exhaust-gas system | strain diagram of the waste incineration plant which enforces the method of this invention. 大気と排ガスの状態変化を表わしたグラフである。It is a graph showing the state change of air | atmosphere and waste gas. 本発明の他の方法を実施するごみ焼却プラントの排ガス系統図である。It is an exhaust-gas system | strain diagram of the waste incineration plant which implements the other method of this invention. 従来の白煙防止方法を実施するごみ焼却システムの概略系統図である。It is a schematic system diagram of the refuse incineration system which enforces the conventional white smoke prevention method.

符号の説明Explanation of symbols

１はガスダクト、５は煙突、５ａは煙突の鋼板製内筒、６は白煙防止装置、Ｇは排ガス、Ａは加熱空気。   1 is a gas duct, 5 is a chimney, 5a is a steel cylinder inner cylinder of the chimney, 6 is a white smoke prevention device, G is exhaust gas, and A is heated air.

Claims (1)

排ガスの排出経路に設置した白煙防止装置により、ガスダクト内を流れる排ガスに加熱空気を混合若しくはガスダクト内を流れる排ガスを再加熱し、煙突から大気中へ放出される排ガスの白煙化を防止するようにした白煙防止方法に於いて、煙突の排ガスと接触する鋼板製内筒の排ガス入口及び排ガス出口の鉄皮部分の温度を計測し、同時に外気温度及び外気湿度とガスダクト内を流れる排ガスの温度、水分、ＳＯｘ濃度及びＨＣｌ濃度とを夫々検出し、これらの検出結果に基づいて排ガスの白煙化及び煙突の鋼板製内筒の低温腐食を夫々防止できるように前記白煙防止装置を制御するようにしたことを特徴とする白煙防止方法。   The white smoke prevention device installed in the exhaust gas discharge route mixes heated air with the exhaust gas flowing in the gas duct or reheats the exhaust gas flowing in the gas duct to prevent the exhaust gas emitted from the chimney into the atmosphere from becoming white smoke In the above-described white smoke prevention method, the temperature of the iron skin portion of the steel tube inner cylinder that contacts the exhaust gas of the chimney is measured, and at the same time, the outside air temperature, the outside air humidity, and the exhaust gas flowing through the gas duct are measured. The temperature, moisture, SOx concentration, and HCl concentration are detected, and the white smoke prevention device is controlled based on the detection results so that the exhaust gas becomes white smoke and the low temperature corrosion of the chimney steel plate inner cylinder can be prevented. A method for preventing white smoke, characterized in that
JP2005001175A 2005-01-06 2005-01-06 White smoke prevention method Expired - Fee Related JP4558512B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005001175A JP4558512B2 (en) 2005-01-06 2005-01-06 White smoke prevention method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005001175A JP4558512B2 (en) 2005-01-06 2005-01-06 White smoke prevention method

Publications (2)

Publication Number Publication Date
JP2006189195A JP2006189195A (en) 2006-07-20
JP4558512B2 true JP4558512B2 (en) 2010-10-06

Family

ID=36796572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005001175A Expired - Fee Related JP4558512B2 (en) 2005-01-06 2005-01-06 White smoke prevention method

Country Status (1)

Country Link
JP (1) JP4558512B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110270223A (en) * 2018-03-16 2019-09-24 三菱重工业株式会社 The method of operation of emission-control equipment and emission-control equipment

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008270040A (en) * 2007-04-23 2008-11-06 Toyota Motor Corp Exhaust adjusting device of fuel cell and exhaust pipe for fuel cell
JP5836049B2 (en) * 2011-10-14 2015-12-24 三菱重工環境・化学エンジニアリング株式会社 White smoke prevention method and apparatus for realizing the same
JP6172712B2 (en) * 2013-07-05 2017-08-02 株式会社タクマ White smoke prevention method and apparatus for waste incineration equipment
CN104132356A (en) * 2014-07-30 2014-11-05 上海迪夫格环境科技有限公司 Device for preventing chimney rain and gypsum rain by heating inner cylinder wall of wet chimney through steam
CN106871146A (en) * 2017-04-17 2017-06-20 洛阳瑞昌石油化工设备有限公司 A kind of chimney for eliminating wet desulphurization white cigarette

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5896914A (en) * 1981-12-07 1983-06-09 Masahiko Tsunoda Controlling method of white fume preventive device
JPH0263443U (en) * 1988-10-31 1990-05-11
JPH03121330U (en) * 1990-03-16 1991-12-12
JPH0650526A (en) * 1992-07-31 1994-02-22 Kubota Corp Incinerator
JPH07127840A (en) * 1993-06-28 1995-05-16 Kawasaki Giken:Kk White smoke-preventing method in incineration
JPH11248124A (en) * 1998-03-05 1999-09-14 Mitsui Eng & Shipbuild Co Ltd Cooler and cooling method for exhaust gas

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5896914A (en) * 1981-12-07 1983-06-09 Masahiko Tsunoda Controlling method of white fume preventive device
JPH0263443U (en) * 1988-10-31 1990-05-11
JPH03121330U (en) * 1990-03-16 1991-12-12
JPH0650526A (en) * 1992-07-31 1994-02-22 Kubota Corp Incinerator
JPH07127840A (en) * 1993-06-28 1995-05-16 Kawasaki Giken:Kk White smoke-preventing method in incineration
JPH11248124A (en) * 1998-03-05 1999-09-14 Mitsui Eng & Shipbuild Co Ltd Cooler and cooling method for exhaust gas

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110270223A (en) * 2018-03-16 2019-09-24 三菱重工业株式会社 The method of operation of emission-control equipment and emission-control equipment

Also Published As

Publication number Publication date
JP2006189195A (en) 2006-07-20

Similar Documents

Publication Publication Date Title
JP4558512B2 (en) White smoke prevention method
AU2010324040B2 (en) Exhaust gas treatment device for an oxygen combustion system
JP5302597B2 (en) Exhaust gas treatment apparatus and exhaust gas treatment method
KR101160815B1 (en) Waste Heat Recovery System
CN106090971A (en) A kind of combined steam flue gas MGGH system and method
CN105889899B (en) A kind of overheating steam temperature regulating system and method suitable for putting into operation under SCR underloads
ITMI20090709A1 (en) METHOD AND APPARATUS FOR IMPROVING THE EFFICIENCY OF A HEAT GENERATOR FOR INDUSTRIAL OR DOMESTIC USE
JP2004154683A (en) Exhaust gas treatment equipment and its operation method
CN106382824A (en) Novel tube heating furnace waste heat recovery system and method
US3382649A (en) Treatment of incinerator gases
JP2010127598A (en) Treated object combustion system and method of controlling concentration of nitrogen oxide in exhaust gas
CN209173734U (en) A kind of cooling protection system being applicable in activated coke dry method
JP2004060992A (en) Waste heat recovery boiler for incinerator
CN110260674A (en) Air cooling system and control method for thermal power plant
JPH09192430A (en) Waste gas dust collector for refuse incinerator and its operation
CN212262887U (en) Low-emission movable medical waste incineration tail gas treatment device
CN205948592U (en) A desulfurization system for using low -sulfur coal burning boiler
JPH06238127A (en) Flue gas treating device and controller for same
JPH1073238A (en) Method and device for heating air for combustion system
CN209405993U (en) Low-temp desulfurization device
JPH09323024A (en) Flue gas treating plant and its operation
CN219933983U (en) Dangerous waste incineration flue gas recirculation device
CN219756321U (en) Comprehensive utilization device for waste gas of synthetic ammonia produced by coal
CN220250020U (en) RTO waste gas alternating temperature back-firing device
JP3717221B2 (en) Waste incinerator exhaust gas control system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20071002

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100707

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100716

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100721

R150 Certificate of patent or registration of utility model

Ref document number: 4558512

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130730

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees