JPH1062404A - Method for measuring moisture concentration in exhaust gas and dust collecting device - Google Patents
Method for measuring moisture concentration in exhaust gas and dust collecting deviceInfo
- Publication number
- JPH1062404A JPH1062404A JP8221990A JP22199096A JPH1062404A JP H1062404 A JPH1062404 A JP H1062404A JP 8221990 A JP8221990 A JP 8221990A JP 22199096 A JP22199096 A JP 22199096A JP H1062404 A JPH1062404 A JP H1062404A
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- fuel
- water
- gas
- combustion
- pressure gauge
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Abstract
(57)【要約】
【課題】 加熱炉等から排出する排ガス中のダスト濃度
の測定に際して、ダスト採取管の入口におけるガス流速
を排気ダクトにおけるガス流速と等しい等速吸引量に制
御する。
【解決手段】 バーナー７により燃焼Ｆを燃焼用空気Ａ
により燃焼する加熱炉６において、バーナー７に供給す
る燃焼用空気Ａ中の水分量ａｗ（ｇ／ｍ3Ｎ）を水分検
知管を用いて測定し、該水分量を燃料１ｋｇを燃焼させ
たときの燃料用空気中の水分量Ａｗ（ｇ／ｋｇ）に換算
し、該水分量Ａｗと燃料Ｆの成分組成から求めた燃料の
燃焼によって発生する水分量Ｆｗ（ｇ／ｋｇ）の合計値
によって排ガスの水分濃度を求め、該水分濃度を用いて
等速吸引量を演算するとともに該等速吸引量に応じて流
量調整弁１４を制御する。
(57) [Problem] To measure a dust concentration in exhaust gas discharged from a heating furnace or the like, a gas flow rate at an inlet of a dust sampling pipe is controlled to a constant velocity suction amount equal to a gas flow rate in an exhaust duct. SOLUTION: Burner 7 converts combustion F into combustion air A.
When the amount of water aw (g / m 3 N) in the combustion air A to be supplied to the burner 7 is measured using a water detector tube in the heating furnace 6 that burns with 1 kg of fuel, the amount of water is burned with 1 kg of fuel. Is converted into the water content Aw (g / kg) in the fuel air of the above, and the exhaust gas is calculated by the sum of the water content Aw and the water content Fw (g / kg) generated by the combustion of the fuel obtained from the composition of the fuel F. Is calculated, and the constant-velocity suction amount is calculated using the water concentration, and the flow control valve 14 is controlled in accordance with the constant-velocity suction amount.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、加熱炉等の燃焼装
置から排出する排ガス中のダスト濃度測定のためのダス
トを採取する装置及びダスト採取において必要な排ガス
中の水分濃度を測定する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for collecting dust for measuring the concentration of dust in exhaust gas discharged from a combustion apparatus such as a heating furnace, and a method for measuring the moisture concentration in exhaust gas required for dust collection. Things.
【０００２】[0002]
【従来の技術】加熱炉等から排出する排ガス中のダスト
濃度を測定し、ダスト濃度が規定値以下となるように操
業することが、大気汚染防止法（ＪＩＳ．Ｚ８８０８）
により規定されている。排ガス中のダスト濃度測定に際
して、排気ダクトに設けたダスト採取管により排ガス中
のダストを採取する場合、排気ダクトのガス流速に対し
てダスト採取管のガス流速が不一致であると、ダストを
正確に採取できない。そのため、ダスト採取管のガス流
速を排気ダクトのガス流速と一致させて、ダスト採取管
のガス流速を排気ダクトのガス流速と等しい等速吸引量
とすることが義務付けられている（ＪＩＳ．Ｚ８８０
８）。2. Description of the Related Art It is required to measure the concentration of dust in exhaust gas discharged from a heating furnace or the like and operate the apparatus so that the concentration of dust is equal to or lower than a specified value.
Stipulated by When measuring the dust concentration in the exhaust gas, if the dust in the exhaust gas is collected by the dust collection pipe provided in the exhaust duct, if the gas flow rate in the dust collection pipe does not match the gas flow rate in the exhaust duct, the dust can be accurately measured. Cannot be collected. Therefore, it is obliged that the gas flow velocity of the dust collection pipe is made to match the gas flow velocity of the exhaust duct, and the gas flow velocity of the dust collection pipe is set to a constant suction amount equal to the gas flow velocity of the exhaust duct (JIS. Z880).
8).
【０００３】ダスト採取管のガス流量を等速吸引量とす
るためには、排気ダクトとダスト採取管のガス流速を測
定する必要があるが、排ガスは通常水蒸気を含んでお
り、この水蒸気はダスト採取管に設けられた流量計に到
達するまでに水になる。そのため、等速吸引量とするた
めには排ガス中の水蒸気（以下、水分という）の濃度を
測定し、ダスト採取管で吸引する排ガス流量を水分濃度
分だけ少なくする必要がある。[0003] In order to make the gas flow rate in the dust collecting pipe equal to the suction rate, it is necessary to measure the gas flow velocity in the exhaust duct and the dust collecting pipe. The exhaust gas usually contains water vapor, and the water vapor contains dust. It becomes water by the time it reaches the flow meter provided in the sampling tube. Therefore, in order to obtain a constant-speed suction amount, it is necessary to measure the concentration of water vapor (hereinafter, referred to as moisture) in the exhaust gas and reduce the flow rate of the exhaust gas sucked by the dust collection pipe by the moisture concentration.
【０００４】[0004]
【発明が解決しようとする課題】排ガス中の水分濃度を
測定する方法は、前記の大気汚染防止法により規定され
ており、図５に示すように、煙道の排ガスを水分吸収瓶
１，ＳＯ2吸収瓶２，ミスト除去瓶３，真空ポンプ４，
ガスメータ５に通して重量分析により測定するが、前記
各器具のセット，水分測定，分析及び水分濃度の算出等
に約１時間を必要とするため、能率が悪いという問題が
あった。また、測定値のバラッキが大きいため、精度を
上げるためにはサンプリング回数を増す必要があり、そ
の結果、能率を更に悪くしていた。The method for measuring the moisture concentration in the exhaust gas is specified by the above-mentioned Air Pollution Control Law. As shown in FIG. 2 absorption bottle 2, mist removal bottle 3, vacuum pump 4,
It is measured by gravimetric analysis through the gas meter 5, but it takes about one hour to set each of the instruments, measure the moisture, analyze, and calculate the moisture concentration. In addition, since the measured values have large variations, it is necessary to increase the number of samplings in order to increase the accuracy, and as a result, the efficiency has been further deteriorated.
【０００５】排ガス中の水分濃度を測定する他の方法と
して、例えば特開昭５４−２６７８８号公報によれば、
ガス通路の途中にガス冷却装置を設け、ガス冷却装置の
前後のガス流量差により、排ガス中の水分濃度を測定す
る方法が知られている。しかし、この方法はガス通路に
多数の機器を設けるため、これらの機器による目詰りに
より精度及びメンテナスに問題がある。[0005] As another method for measuring the moisture concentration in exhaust gas, for example, according to Japanese Patent Application Laid-Open No. 54-26788,
2. Description of the Related Art There is known a method in which a gas cooling device is provided in the middle of a gas passage, and a moisture concentration in exhaust gas is measured based on a gas flow difference between before and after the gas cooling device. However, in this method, since many devices are provided in the gas passage, there is a problem in accuracy and maintenance due to clogging by these devices.
【０００６】本発明は、排ガス中のダスト濃度測定のた
めのダスト採取において必要な排ガス中の水分濃度を高
精度で能率よく測定することにより、ダストを高精度で
採取することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to collect dust with high precision by efficiently measuring the water concentration in exhaust gas required for dust collection for measuring dust concentration in exhaust gas.
【０００７】[0007]
【課題を解決するための手段】本発明による焼排ガス中
の水分濃度測定方法は、バーナにより燃料を燃焼する方
法において、該バーナーに供給する燃焼用空気中の水分
量ａｗ（ｇ／ｍ3Ｎ）を水分検知管を用いて測定し、該
水分量ａｗを燃料１ｋｇを燃焼させたときの燃焼用空気
中の水分量Ａｗ（ｇ／ｋｇ）に換算し、該水分量Ａｗと
燃料の成分組成から求めた燃料の燃焼によって発生する
水分量Ｆｗ（ｇ／ｋｇ）の合計値によって燃焼排ガス中
の水分濃度（％）を求めることを特徴とする。According to the present invention, there is provided a method for measuring the concentration of water in a flue gas by burning a fuel by a burner, the method comprising: measuring a water content aw (g / m 3 N) in combustion air supplied to the burner; ) Is measured using a moisture detector tube, and the moisture content aw is converted into the moisture content Aw (g / kg) in the combustion air when 1 kg of fuel is burned, and the moisture content Aw and the component composition of the fuel are calculated. The water concentration (%) in the combustion exhaust gas is obtained from the total value of the water amount Fw (g / kg) generated by the combustion of the fuel obtained from the above.
【０００８】また、焼排ガス中のダスト採取装置は、燃
焼装置(6)の排気ダクト(8)に覗ませてダクト吸引管(9)
とガス導入管(10)とピトー管(11)と温度計(21)及び静圧
計(22)を設け、ダスト吸引管(9)にはガス流れ方向の上
流側からフイルター(12)を内蔵したダスト採取装置(13)
と流量調整弁(14)と吸引ポンプ(15)と流量計(16)と温度
計(23)と圧力計(24)を設け、ガス導入管(10)には酸素濃
度計(17)を設け、ピトー管(11)には動圧計(18)を設け、
酸素濃度計(17)と動圧計(18)と温度計(21)と静圧計(22)
と温度計(23)及び圧力計(24)の信号を取り込んで等速吸
引量ｑｍを演算し、該等速吸引量ｑｍに応じて流量調整
弁(14)を制御する制御装置(19)を設けたことを特徴とす
る。なお、理解を容易にするためにカッコ内には、図面
に示し後述する実施例の対応要素の記号を、参考までに
付記した。[0008] Further, a device for collecting dust in the flue gas is viewed through an exhaust duct (8) of a combustion device (6) and a duct suction pipe (9).
And a gas inlet pipe (10), a pitot pipe (11), a thermometer (21) and a static pressure gauge (22), and a filter (12) built in the dust suction pipe (9) from the upstream side in the gas flow direction. Dust sampling equipment (13)
And a flow control valve (14), a suction pump (15), a flow meter (16), a thermometer (23) and a pressure gauge (24), and an oxygen concentration meter (17) in the gas inlet pipe (10). The pitot tube (11) is provided with a dynamic pressure gauge (18),
Oxygen meter (17), dynamic pressure gauge (18), thermometer (21) and static pressure gauge (22)
And a signal from the thermometer (23) and the pressure gauge (24) to calculate a constant-speed suction amount qm, and a control device (19) for controlling the flow rate regulating valve (14) according to the constant-speed suction amount qm. It is characterized by having been provided. In addition, in order to facilitate understanding, the symbols of the corresponding elements in the embodiments shown in the drawings and described later are added in the parentheses for reference.
【０００９】[0009]
【発明の実施の形態】以下に本発明を図１，図２を参照
して説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to FIGS.
【００１０】図１には、熱間圧延工場に供給される鋼材
Ｋを所定温度に加熱するための燃焼装置としての加熱炉
６を示し、バーナー７には重油，軽油，灯油等の燃料Ｇ
と燃焼用空気Ａが供給され、排ガスは排気ダクト８を通
って煙突から排出される。FIG. 1 shows a heating furnace 6 as a combustion device for heating a steel material K supplied to a hot rolling mill to a predetermined temperature, and a burner 7 has a fuel G such as heavy oil, light oil, kerosene or the like.
And the combustion air A are supplied, and the exhaust gas is discharged from the chimney through the exhaust duct 8.
【００１１】加熱炉６の排気ダクト８には、その内部に
覗ませてダスト吸引管９とガス導入管１０とピトー管１
１と温度計２１及び静圧計２２が設けられている。ダス
ト吸引管９にはガス流れ方向の上流側からフイルター１
２を内蔵したダスト採取装置１３と流量調整弁１４と吸
引ポンプ１５と流量計１６と温度計２３及び圧力計２４
が設けられている。ガス導入管１０には酸素濃度計１７
が設けられており、ピトー管１１には動圧計１８が設け
られている。なお、流量計１６と温度計２３及び圧力計
２４は一体的に設けられた、いわゆるガスメーターを設
けてもよく、またダスト採取装置１３とピトー管１１及
び動圧計１８も通常は一体的に設けられている。The exhaust duct 8 of the heating furnace 6 has a dust suction pipe 9, a gas introduction pipe 10, and a pitot
1, a thermometer 21 and a static pressure gauge 22 are provided. The filter 1 is connected to the dust suction pipe 9 from the upstream side in the gas flow direction.
2, a flow control valve 14, a suction pump 15, a flow meter 16, a thermometer 23, and a pressure gauge 24.
Is provided. An oxygen concentration meter 17 is provided in the gas introduction pipe 10.
Is provided, and the pitot tube 11 is provided with a dynamic pressure gauge 18. It should be noted that a so-called gas meter may be provided in which the flow meter 16, the thermometer 23 and the pressure gauge 24 are integrally provided, and the dust sampling device 13, the pitot tube 11 and the dynamic pressure gauge 18 are also usually provided integrally. ing.
【００１２】制御装置１９は、ピトー管１１に設けられ
た動圧計１８による動圧(mmH2O)と予め求めた排気ダク
ト内のガス重量γ（ｋｇｆ／ｍ3）を用いて（１）式に
より排気ダクト８におけるガス流速ｖ（ｍ／ｓｅｃ）を
演算する。The control device 19 uses the dynamic pressure (mmH 2 O) measured by the dynamic pressure gauge 18 provided on the pitot tube 11 and the gas weight γ (kgf / m 3 ) in the exhaust duct obtained in advance to obtain the equation (1). To calculate the gas flow velocity v (m / sec) in the exhaust duct 8.
【００１３】 ｖ＝ｃ√（２ｇｈ／γ） ・・・（１） 但し、 ｃ：ピトー管係数 ｈ：ピトー管による動圧(mmH2O) γ：排気ダクト内のガス重量(kgf/m3） ｇ：重力の加速度(9.81m/sec2） また、制御装置１９は、（１）式により求めた排気ダク
トのガス流速ｖ(m/sec)と温度計２３による吸引ガス温
度θｍ（°Ｃ）と静圧計２２による排気ダクトの静圧Ｐ
ｓ(mmHg)と温度計２１による排気ダクトのガス温度θｓ
（°Ｃ）と圧力計２４によるガスメーターゲージ圧Ｐｍ
(mmHg)の信号と、予め作成された換算表から求めた前記
吸引ガス温度θｍ（°Ｃ）における飽和蒸気圧(mmHg)と
ダスト採取管９の入口直径ｄ(mm)及び後述する（３）〜
（７）式により求められる吸引ガス中の水分濃度Ｘｗ
（％）により、下記の（２）式を用いて、ダスト採取管
９のガス流速(m/sec)が排気ダクト８のガス流速(m/sec)
と等しい等速吸引量(リットル/min)となるように流量調
整弁１４を制御する。V = c√ (2 gh / γ) (1) where c: Pitot tube coefficient h: Dynamic pressure by pitot tube (mmH 2 O) γ: Gas weight in exhaust duct (kgf / m 3) G: acceleration of gravity (9.81 m / sec 2 ) Further, the control device 19 determines the gas flow velocity v (m / sec) of the exhaust duct obtained by the equation (1) and the suction gas temperature θm (° C ) And the static pressure P of the exhaust duct by the static pressure gauge 22
s (mmHg) and gas temperature θs of exhaust duct by thermometer 21
(° C) and gas meter gauge pressure Pm by pressure gauge 24
(mmHg), the saturated vapor pressure (mmHg) at the suction gas temperature θm (° C) obtained from the conversion table prepared in advance, the inlet diameter d (mm) of the dust sampling pipe 9, and (3) to be described later. ~
Moisture concentration Xw in suction gas obtained by equation (7)
According to (%), the gas flow rate (m / sec) of the dust sampling pipe 9 is changed to the gas flow rate (m / sec) of the exhaust duct 8 using the following equation (2).
The flow control valve 14 is controlled so that the constant suction rate (liter / min) is equal to.
【００１４】[0014]
【数２】 (Equation 2)
【００１５】但し、 ｄ：ダスト採取管の入口直径(mm) ｖ：排気ダクトのガス流速(m/sec) Ｘｗ：吸引ガス中の水分濃度（％） θｍ：吸引ガス温度（°Ｃ） θｓ：排気ダクトのガス温度（°Ｃ） Ｐａ：大気圧(760mmHg) Ｐｓ：排気ダクト内の静圧(mmHg) Ｐｍ：ガスメーターゲージ圧(mmHg) Ｐｖ：θｍの飽和蒸気圧(mmHg) （２）式における吸引ガス中の水分濃度Ｘｗ（％）は、
次のようにして求める。 加熱される鋼材Ｋから発生す
る水分量を無視すると、排ガス中の水分量は、燃料の燃
焼によって発生する水分量と燃焼用空気中の水分量との
合計水分量と等しい。そこで、燃料の燃焼によって発生
する水分量と燃焼用空気中の水分量との合計水分量を算
出し、この値を排ガス中の水分量とする。Here, d: diameter of the inlet of the dust collection pipe (mm) v: gas flow rate of the exhaust duct (m / sec) Xw: moisture concentration in the suction gas (%) θm: suction gas temperature (° C) θs: Gas temperature of exhaust duct (° C) Pa: Atmospheric pressure (760 mmHg) Ps: Static pressure in exhaust duct (mmHg) Pm: Gas meter gauge pressure (mmHg) Pv: Saturated vapor pressure of θm (mmHg) The moisture concentration Xw (%) in the suction gas is
We ask as follows. If the amount of water generated from the steel material K to be heated is neglected, the amount of water in the exhaust gas is equal to the total amount of water generated by combustion of the fuel and the amount of water in the combustion air. Therefore, the total moisture content of the moisture content generated by the combustion of the fuel and the moisture content in the combustion air is calculated, and this value is defined as the moisture content in the exhaust gas.
【００１６】燃料１ｋｇの燃焼によって発生する水分量
Ｆｗ(g/kg)は、（３）式によって求まる。なお、燃料中
の水分量及び水素量は、例えば表１に示すように予め知
られている値を用いる。The amount of water Fw (g / kg) generated by the combustion of 1 kg of fuel is determined by the following equation (3). Note that, as the water content and the hydrogen content in the fuel, for example, values known in advance as shown in Table 1 are used.
【００１７】 Ｆｗ＝ｆｗ＋ｆｈ ・・・（３） 但し、ｆｗ：燃料中の水分量(g/kg) ｆｈ：燃料中の水素量を水分量に換算した値(g/kg)Fw = fw + fh (3) where fw: the amount of water in the fuel (g / kg) fh: the value obtained by converting the amount of hydrogen in the fuel into the amount of water (g / kg)
【００１８】[0018]
【表１】 [Table 1]
【００１９】一方、燃焼用空気中の水分量の測定は、図
２に示す水分検知管２０〔例えば、ガステック（株）製
の水蒸気Ｎｏ．６Ｌ（商標）〕をバーナー７に供給する
燃焼用空気のブロアー（図示しない）の入口に近ずけ
て、ツマミ２０ａを矢印の方向に引くことによって燃焼
用空気を採取し、水分検知管２０の変色境界部の目盛り
の値を読み取り、その値と予め求めた図３に示す換算表
を用いて燃焼用空気中の水分量ａｗ（ｇ／ｍ3Ｎ）を求
める。なお、図３における１／２ストロークは、水分検
知器２０のツマミ２０の引抜ストロークを１／２とした
場合であり、°Ｃは、バーナー７の入側で測定した燃焼
用空気の温度である。On the other hand, the amount of water in the combustion air is measured by using a water detecting tube 20 [for example, steam No. 6L (trademark)] is approached to the inlet of a combustion air blower (not shown) for supplying to the burner 7, and the knob 20a is pulled in the direction of the arrow to collect combustion air. The value of the scale at the boundary of the discoloration is read, and the water content aw (g / m 3 N) in the combustion air is determined using the value and the conversion table shown in FIG. Note that the ス ト ロ ー ク stroke in FIG. 3 is a case where the withdrawal stroke of the knob 20 of the moisture detector 20 is １ ／, and ° C. is the temperature of the combustion air measured on the inlet side of the burner 7. .
【００２０】制御装置１９は、酸素濃度計１７による酸
素濃度Ｏ2（％）の信号による空気比ｍ，バーナー７の
入側で測定した燃焼用空気の温度Ｔ（°Ｃ），大気圧Ｋ
としての760(mmHg)及び前記表１による燃料の理論空気
量Ａo(m3N/kg)，前記により求めた燃焼用空気中の水分
量ａｗ(g/m3N)を用いて、（４）式により燃料１ｋｇが
燃焼したときの燃焼用空気中の水分量Ａｗ(g/kg)を演算
する。The control device 19 controls the air ratio m based on the signal of the oxygen concentration O 2 (%) from the oxygen concentration meter 17, the temperature T (° C.) of the combustion air measured at the inlet of the burner 7, and the atmospheric pressure K.
Using 760 (mmHg) as the theoretical air amount Ao (m 3 N / kg) of the fuel according to Table 1 and the water content aw (g / m 3 N) in the combustion air determined as described above, (4 The water content Aw (g / kg) in the combustion air when 1 kg of the fuel is burned is calculated by the formula (1).
【００２１】 Ａｗ＝ａｗ×ｍ×Ａo×〔273/(273＋Ｔ)〕×(760/Ｐa) ・・・（４） 但し、 ａｗ：検知管による燃焼用空気中の水分量(g/m3) ｍ：空気比＝21/(21-Ｏ2） Ｏ2：酸素濃度（％） Ａo：燃料の理論空気量(Nm3/kg) Ｔ：燃焼用空気の温度（°Ｃ） Ｐa：大気圧(760mmHg) 燃料１ｋｇの燃焼によって発生する水分量Ｆｗ（g/kg)
を（５）式により演算する。Aw = aw × m × Ao × [273 / (273 + T)] × (760 / Pa) (4) where aw is the amount of water in the combustion air from the detector tube (g / m 3 ). m: air ratio = 21 / (21-O 2 ) O 2 : oxygen concentration (%) Ao: theoretical amount of fuel air (Nm 3 / kg) T: temperature of combustion air (° C) Pa: atmospheric pressure ( 760mmHg) Moisture amount Fw (g / kg) generated by burning 1kg of fuel
Is calculated by equation (5).
【００２２】 Ｆｗ＝（Ｈ＋Ｗ）×１０ ・・・（５） 但し、 Ｈ：燃料中の水素濃度（％） Ｗ：燃料中の水分濃度（％） 前記（４）式及び（５）式により燃料１ｋｇの燃焼によ
って発生する排ガス中の水分量Ｇｗ(g/kg)を（６）式に
より演算する。Fw = (H + W) × 10 (5) where, H: concentration of hydrogen in fuel (%) W: concentration of water in fuel (%) According to the formulas (4) and (5), The water content Gw (g / kg) in the exhaust gas generated by the combustion of 1 kg is calculated by the equation (6).
【００２３】 Ｇｗ＝Ａｗ＋Ｆｗ ・・・（６） 但し、 Ａｗ：燃料１ｋｇが燃焼したときの燃焼用空気中の水分
量(g/kg) Ｆｗ：燃料１ｋｇｆｋ燃焼によって発生する水分量(g/k
g) 吸引ガス中の水分濃度Ｘｗ（％）は式（７）により演算
する。Gw = Aw + Fw (6) where Aw: the amount of water in the combustion air when 1 kg of fuel is burned (g / kg) Fw: the amount of water (g / k) generated by burning 1 kg of fuel 1 kgfk
g) The water concentration Xw (%) in the suction gas is calculated by the equation (7).
【００２４】[0024]
【数７】 (Equation 7)
【００２５】但し、 ｍ：空気比〔21/(21-Ｏ2)〕 Ｇｗ：燃焼用排ガス中の水分量(g/kg) Ｆｗ：燃料の燃焼によって発生する水分量(g/kg) Ａo：燃料の理論空気量(m3N/kg) Ｓ：燃料中の硫黄濃度（％） Ｃ：燃料中の炭素濃度（％） Ｎ：燃料中の窒素濃度（％）Where m: air ratio [21 / (21-O 2 )] Gw: amount of water in combustion exhaust gas (g / kg) Fw: amount of water generated by fuel combustion (g / kg) Ao: Fuel theoretical air volume (m 3 N / kg) S: Sulfur concentration in fuel (%) C: Carbon concentration in fuel (%) N: Nitrogen concentration in fuel (%)
【００２６】[0026]
【実施例】図４は、図１に示した加熱炉６における操業
条件を一定として、本発明の装置を用いた本発明例と、
図５に示した装置を用いた従来例とにより、排ガス中の
水分濃度を合計８回測定した結果を示している。図に示
すように、本発明例によれば測定値のバラツキを標準偏
差で従来は０．６３であったものを０．１７に小さくす
ることができた。また、排ガス中の水分濃度の測定所要
時間を、従来は約１時間であったものを約３分に短縮で
きた。FIG. 4 shows an example of the present invention using the apparatus of the present invention with the operating conditions in the heating furnace 6 shown in FIG.
5 shows the results of measuring the water concentration in the exhaust gas eight times in total by using the conventional example using the apparatus shown in FIG. As shown in the figure, according to the example of the present invention, the dispersion of the measured values can be reduced from the conventional value of 0.63 to 0.17 by the standard deviation to 0.17. In addition, the time required for measuring the moisture concentration in the exhaust gas was reduced from about 1 hour in the past to about 3 minutes.
【００２７】[0027]
【発明の効果】本発明の方法によれば、排ガス中のダス
ト濃度の測定において必要な排ガス中の水分濃度の測定
を、燃焼用空気中の水分量と燃料の燃焼によって発生す
る水分量の合計によって求めるようにしたので、測定値
のバラツキを小さくして高精度で能率よく測定すること
ができる。According to the method of the present invention, the measurement of the moisture concentration in the exhaust gas required for the measurement of the dust concentration in the exhaust gas is performed by determining the sum of the moisture amount in the combustion air and the moisture amount generated by the combustion of the fuel. Therefore, it is possible to reduce the variation of the measured value and measure the measurement with high accuracy and efficiency.
【００２８】また、本発明の装置によれば、排ガス中の
ダストの採取において、ダスト採取装置におけるガス流
速を排気ダクトのガス流速と等しい等速吸引量に高精度
で制御可能としたので、排ガス中のダストを高精度で能
率よく採取することができる。Further, according to the apparatus of the present invention, when collecting dust in the exhaust gas, the gas flow rate in the dust collecting apparatus can be controlled with high accuracy to a constant velocity suction amount equal to the gas flow rate in the exhaust duct. The dust inside can be collected with high accuracy and efficiency.
【図１】 本発明の一実施例の構成を示すブロック図で
ある。FIG. 1 is a block diagram showing a configuration of one embodiment of the present invention.
【図２】 本発明において使用する水分検知管の側面図
である。FIG. 2 is a side view of a moisture detecting tube used in the present invention.
【図３】 図２に示す水分検知管の目盛と燃焼中空気中
の水分量の関係を示グラフである。FIG. 3 is a graph showing the relationship between the scale of the moisture detection tube shown in FIG. 2 and the amount of moisture in air during combustion.
【図４】 排ガス中水分濃度の測定値を示すグラフであ
る。FIG. 4 is a graph showing measured values of the moisture concentration in exhaust gas.
【図５】 従来の排ガス中の水分濃度測定装置の構成を
示すブロック図である。FIG. 5 is a block diagram showing a configuration of a conventional apparatus for measuring the concentration of water in exhaust gas.
１：水分吸収瓶 ２：ＳＯ2吸収瓶 ３：ミスト除去瓶 ４：真空ポンプ ５：ガスメータ ６：加熱炉 ７：バーナー ８：排気ダクト ９：ダスト採取管 １０：排ガス導入管 １１：ピトー管 １２：フイルター １３：ダスト採取装置 １４：流量調整弁 １５：吸引ポンプ １６：流量計 １７：酸素濃度計 １８：動圧計 １９：制御装置 ２０：水分検知管 ２１：排気ダクトの温度計 ２２：排気ダクト
の静圧計 ２３：ガスメーターの温度計 ２４：ガスメータ
ーの圧力計 Ａ：燃焼用空気 Ｇ：燃料 Ｋ：鋼材1: Moisture absorption bottles 2: SO 2 absorption bottles 3: mist removal bin 4: Vacuum pump 5: gas meter 6: heating furnace 7: burner 8: exhaust duct 9: Dust collection pipe 10: gas introducing pipe 11: Pitot tube 12: Filter 13: Dust sampling device 14: Flow control valve 15: Suction pump 16: Flow meter 17: Oxygen concentration meter 18: Dynamic pressure gauge 19: Control device 20: Moisture detection tube 21: Thermometer of exhaust duct 22: Static of exhaust duct Pressure gauge 23: Gas meter thermometer 24: Gas meter pressure gauge A: Combustion air G: Fuel K: Steel material
───────────────────────────────────────────────────── フロントページの続き (72)発明者 乾 榮 介 光市大字島田3434番地 新日本製鐵株式会 社光製鐵所内 (72)発明者 岡 ▲ざき▼ 正 和 光市大字島田3434番地 新日本製鐵株式会 社光製鐵所内 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Eisuke Inui 3434 Shimada, Hikari-shi, Nippon Steel Corporation Inside the Hikari Works (72) Inventor Oka ▲ Za ▼▼ 3434 Shimada, Oaza, Wakashi-shi New Nippon Steel Corporation Hikari Works
Claims (2)
て、該バーナーに供給する燃焼用空気中の水分量ａｗ
（ｇ／ｍ3Ｎ）を水分検知管を用いて測定し、該水分量
ａｗを燃料１ｋｇを燃焼させたときの燃焼用空気中の水
分量Ａｗ（ｇ／ｋｇ）に換算し、該水分量Ａｗと燃料の
成分組成から求めた燃料の燃焼によって発生する水分量
Ｆｗ（ｇ／ｋｇ）の合計値によって燃焼排ガス中の水分
濃度（％）を求めることを特徴とする燃焼排ガス中の水
分濃度測定方法。1. A method for burning fuel by a burner, wherein the amount of water aw in the combustion air supplied to the burner is
(G / m 3 N) was measured using a moisture detector tube, and the moisture content aw was converted to the moisture content Aw (g / kg) in the combustion air when 1 kg of fuel was burned. Measuring the water concentration (%) in the combustion exhaust gas based on the total value of Aw and the water content Fw (g / kg) generated by combustion of the fuel obtained from the composition of the fuel; Method.
吸引管とガス導入管とピトー管と温度計及び静圧計を設
け、ダスト吸引管にはガス流れ方向の上流側からフイル
ターを内蔵したダスト採取装置と流量調整弁と吸引ポン
プと流量計と温度計と圧力計を設け、ガス導入管には酸
素濃度計を設け、ピトー管には動圧計を設け、酸素濃度
計と動圧計と温度計と静圧計と温度計及び圧力計の信号
を取り込んで等速吸引量ｑｍを演算し、該等速吸引量ｑ
ｍに応じて流量調整弁を制御する制御装置を設けたこと
を特徴とする燃焼排ガス中のダスト採取装置。2. A dust suction pipe, a gas introduction pipe, a pitot pipe, a thermometer and a static pressure gauge are provided in the exhaust duct of the combustion apparatus, and a dust suction pipe has a built-in filter from the upstream side in the gas flow direction. A sampling device, a flow control valve, a suction pump, a flow meter, a thermometer, and a pressure gauge are provided.A gas introduction pipe is provided with an oxygen concentration meter, a pitot tube is provided with a dynamic pressure gauge, and an oxygen concentration meter, a dynamic pressure gauge, and a thermometer are provided. And the signals of the static pressure gauge, the thermometer and the pressure gauge are taken in, and the constant speed suction amount qm is calculated.
A device for collecting dust in combustion exhaust gas, comprising a control device for controlling a flow control valve according to m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8221990A JPH1062404A (en) | 1996-08-23 | 1996-08-23 | Method for measuring moisture concentration in exhaust gas and dust collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8221990A JPH1062404A (en) | 1996-08-23 | 1996-08-23 | Method for measuring moisture concentration in exhaust gas and dust collecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1062404A true JPH1062404A (en) | 1998-03-06 |
Family
ID=16775362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8221990A Withdrawn JPH1062404A (en) | 1996-08-23 | 1996-08-23 | Method for measuring moisture concentration in exhaust gas and dust collecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1062404A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002031469A1 (en) * | 2000-08-10 | 2002-04-18 | Rupprecht & Patashnick Company, Inc. | Exhaust gas particulate mass measurement apparatus with real-time moisture monitor |
| KR100872151B1 (en) | 2008-06-27 | 2008-12-08 | (주)두일테크 | Autosampler with precise control of constant velocity suction through automatic differential pressure correction and constant velocity suction control method using the same |
-
1996
- 1996-08-23 JP JP8221990A patent/JPH1062404A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002031469A1 (en) * | 2000-08-10 | 2002-04-18 | Rupprecht & Patashnick Company, Inc. | Exhaust gas particulate mass measurement apparatus with real-time moisture monitor |
| US6439027B1 (en) | 2000-08-10 | 2002-08-27 | Rupprecht & Patashnick Company, Inc. | Particulate mass measurement apparatus with real-time moisture monitor |
| KR100872151B1 (en) | 2008-06-27 | 2008-12-08 | (주)두일테크 | Autosampler with precise control of constant velocity suction through automatic differential pressure correction and constant velocity suction control method using the same |
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