JPS59137848A - Calorimeter - Google Patents

Calorimeter

Info

Publication number
JPS59137848A
JPS59137848A JP1237283A JP1237283A JPS59137848A JP S59137848 A JPS59137848 A JP S59137848A JP 1237283 A JP1237283 A JP 1237283A JP 1237283 A JP1237283 A JP 1237283A JP S59137848 A JPS59137848 A JP S59137848A
Authority
JP
Japan
Prior art keywords
passage
measured
gas
thermocouple
measuring ends
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
Application number
JP1237283A
Other languages
Japanese (ja)
Inventor
Shosaku Maeda
前田　昌作
Takeshi Matsuoka
毅 松岡
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.)
Azbil Corp
Original Assignee
Azbil Corp
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 Azbil Corp filed Critical Azbil Corp
Priority to JP1237283A priority Critical patent/JPS59137848A/en
Publication of JPS59137848A publication Critical patent/JPS59137848A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
    • G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
    • G01N25/28—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly
    • G01N25/30—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements
    • G01N25/32—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures the rise in temperature of the gases resulting from combustion being measured directly using electric temperature-responsive elements using thermoelectric elements

Abstract

PURPOSE:To easily prepare a calorimeter having reliability, by mounting a thermocouple to the passage of diluted gas to be measured so as to allow the measuring ends to face to said passage while mounting an electric heating means capable of burning the above mentioned gas to both measuring ends of said thermocouple. CONSTITUTION:A thermocouple 4 comprising a Pt-wire or a Rh-containing Pt alloy wire is provided to the lateral side of a feed pipe 1 so that the measuring ends 4a, 4b thereof each being a contact point face to the upstream and the down stream sides of the passage 2 of said pipe 1 while a platinum filament 5 being an electric heating means is arranged between the aforementioned measuring ends 4a, 4b. When measurement is performed in this arrangement, diluted gas SG to be measured is supplied to the passage 2 while heated to a definite temp. in a branched pipe 3. In this case, because reaction heat due to combustion is generated when the gas is contacted with the platnium filament 5, if the temps. before and after combustion are detected by the measuring ends 4a, 4b and the output E0 obtained corresponding to the temp. difference, the calorie of the diluted gas to be measured can be detected.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、主として燃料用ガスの熱量測定に用いられる
カロリーメータに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a calorimeter mainly used for measuring the calorific value of fuel gas.

〔従来技術〕[Prior art]

近年、都市ガス等の精製工程管理用あるいは取引用とし
て、連続的かつ即時的にガスの熱量を測定できるカロリ
ーメータが要望さｎている。In recent years, there has been a demand for calorimeters that can continuously and instantly measure the calorific value of gas, for use in controlling the refining process of city gas, etc., or for trading.

従来、この種のカロリーメータにおいては、ガス通路中
へ、白金線等の表面へ触媒を固着させたセンサを設け、
ガスと触媒との反応による発熱量を白金線等の抵抗値変
化として検出するものが提案されている０ しかるに、従来のメータにおいては、白金線等へ触媒を
固着させる場合、白金線がきわめて細いうえスラリー状
とした触媒を塗布して焼結させるため、こｎに高度の技
術を要するという欠点がある。また、触媒をスラリー状
とする際の溶媒が残留し、これが熱量測定に悪影響を与
えてセンサとしての信頼性が低下するという不都合があ
る。Conventionally, in this type of calorimeter, a sensor with a catalyst fixed to the surface of a platinum wire or the like is installed in the gas passage.
A device has been proposed that detects the amount of heat generated by the reaction between a gas and a catalyst as a change in resistance of a platinum wire, etc.0 However, in conventional meters, when the catalyst is fixed to a platinum wire, etc., the platinum wire is extremely thin. Furthermore, since a catalyst slurry is applied and sintered, this process has the disadvantage of requiring highly sophisticated technology. Further, there is a problem in that the solvent used to make the catalyst into a slurry remains, which has an adverse effect on calorimetry and reduces the reliability of the sensor.

〔発明の概要〕[Summary of the invention]

本発明はこのような事情に鑑みなさｎたもので、被測定
希釈ガスの通路の上流および下流側にそｎぞｎ測定端が
臨む熱電対と、こｎらの測定端間に被測定希釈ガスを燃
焼可能にする表面温度をもった電熱手段とを備えること
により、きわめて容易に製造でき、かつセンサとして信
頼性の高いカロリーメータを提供するものである。以下
、その構成等を図に示す実施例によって詳細に説明する
。The present invention was developed in view of the above circumstances, and includes a thermocouple whose measurement ends face upstream and downstream of the passage of the dilution gas to be measured, and a thermocouple with the measurement ends facing the dilution gas to be measured. The present invention provides a calorimeter that is extremely easy to manufacture and highly reliable as a sensor by being equipped with an electric heating means having a surface temperature that allows gas to be combusted. Hereinafter, the configuration and the like will be explained in detail with reference to embodiments shown in the drawings.

〔実施例〕〔Example〕

図は本発明に係るカロリーメータを示す断面図である。 The figure is a sectional view showing a calorimeter according to the present invention.

同図において、符号１で示すものは縦方向に長く形成さ
ｎた送通管で、内部に入口２ａを有する被測定希釈ガス
ＳＧの通路２が形成されており、下部にはこの通路２に
連通する枝管３が設けらｎている。４はｐｔ線およびＲ
ｈを含むｐｔの合金線からなる熱電対で、前記通路２の
上流および下流側にそｎぞれ接合点である測定端４ａ　
。In the figure, the reference numeral 1 indicates a passage pipe formed long in the vertical direction, and a passage 2 for the dilution gas to be measured SG having an inlet 2a is formed inside the passage 2. A communicating branch pipe 3 is provided. 4 is the pt line and R
A thermocouple made of a PT alloy wire containing h, and measuring ends 4a which are junction points on the upstream and downstream sides of the passage 2, respectively.
.

４ｂを臨ませ前記送通管１の側方に設けら扛ている。５
は電熱手段である白金フィラメントで、前記測定端４ａ
　、　４ｂ間に配置されている。この白金フィラメント
５は表面が定抵抗器５ａを通って流ｎる電流により少な
くとも８００℃の温度に保たれており、前記通路２に送
給さｎた被測定希釈ガスＳＧと接触してこ扛を燃焼でき
るように構成さ扛ている。６はニクロム線等からなる保
温用のヒータで、前記枝管３の外周面に巻回し前配送通
管１の入口２ａ側に配置さ扛ている。Ｔは前記送通管１
の外方に配設さｎたヒータコントローラで、前記通路２
における入口２ａ側に配置さｔた温度センサ８の検出出
力に応じて通電電流を制御するように構成さｎている０
こｎによって前記保温用のヒータ６は前記通路２に定流
量で送給される被測定希釈ガスＳＧを一定温度に加熱す
ることを可能としている。4b is exposed and is provided on the side of the transmission pipe 1. 5
is a platinum filament which is an electric heating means, and the measuring end 4a
, 4b. The surface of this platinum filament 5 is kept at a temperature of at least 800° C. by a current flowing through a constant resistor 5a, and the platinum filament 5 comes into contact with the dilution gas SG to be measured, which is fed into the passage 2. It is constructed so that it can be burned. Reference numeral 6 denotes a heat-retaining heater made of nichrome wire or the like, which is wound around the outer peripheral surface of the branch pipe 3 and placed on the inlet 2a side of the pre-delivery pipe 1. T is the delivery pipe 1
a heater controller disposed outside the passage 2;
The current is configured to be controlled in accordance with the detection output of a temperature sensor 8 disposed on the inlet 2a side of the
This makes it possible for the heat-retaining heater 6 to heat the dilution gas SG to be measured, which is fed to the passage 2 at a constant flow rate, to a constant temperature.

したがって、被測定希釈ガスＳＧは枝管３内において一
定温度に加熱されたうえ、通路２に送給さ扛、白金フィ
ラメント５に接触すると、燃焼による反応熱が発生する
ため、測定端４ａおよび４ｂにより燃焼前、後の温度を
検出し、その温度差に応じて得らｎる出力Ｅｏを求め扛
ば被測定希釈ガスＳＧの熱量を検知することができる。Therefore, the dilution gas SG to be measured is heated to a constant temperature in the branch pipe 3, and when it is fed into the passage 2 and comes into contact with the platinum filament 5, reaction heat due to combustion is generated, so that the measuring ends 4a and 4b By detecting the temperature before and after combustion, and calculating the output Eo obtained according to the temperature difference, the amount of heat of the dilution gas SG to be measured can be detected.

なお、本実施例においては白金フィラメント５の両端子
間および定抵抗器５ａの両端にそれぞ社訓わる電圧Ｖｌ
、Ｖ２の積が一定値を保つように制御して熱電対４側の
出力ＥＯを求め、被測定希釈ガスＳＧの熱量を検知する
ものを示したが、本発明はこれに限定さ扛るものではな
く、Ｅｏが常時一定値を保つように制御し、ｖｌ　、ｖ
２の変化を求めることによって被測定希釈ガスＳＧの熱
量を検知することもできる。また、本実施例において熱
電対４は１個配設するものを示したが、こ扛らをｎ個と
すｎば１個のみの場合に比べ、ｎ倍の電圧を有する出力
Ｅｏが得ら扛るため効果的である。さらに、電熱手段の
材料として白金フィラメント５を用いたが、表面が少な
くとも８００℃の高温状態を保持するものであるならば
ニクロム線のような材料であっても差支えない。In this embodiment, the voltage Vl specified by the company is applied between both terminals of the platinum filament 5 and between both ends of the constant resistor 5a.
, the output EO of the thermocouple 4 side is determined by controlling the product of V2 to maintain a constant value, and the amount of heat of the dilution gas SG to be measured is detected, but the present invention is not limited to this. Instead, Eo is controlled to always keep a constant value, and vl, v
The amount of heat of the dilution gas SG to be measured can also be detected by determining the change in 2. Furthermore, in this embodiment, one thermocouple 4 is provided, but if there are n thermocouples, an output Eo having n times the voltage can be obtained compared to the case where there is only one thermocouple. It is effective because it can be used as a deterrent. Further, although platinum filament 5 was used as the material for the electric heating means, a material such as nichrome wire may be used as long as the surface maintains a high temperature state of at least 800°C.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明によ牡ば被測定希釈ガスの
通路に測定端が臨む熱電対と、この熱電対の両測定端間
に被測定希釈ガスを燃焼可能にする表面温度をもった電
熱手段とを備えたので、きわめて容易に製造することが
できる。また、熱電対自身では発熱しないから、正確な
測定が行えるとともに、熱電対の熱容量が小であるため
検出の応答速度を向上させることができ、被測定希釈ガ
スに対する発熱量測定用の計器として顕著な効果を得る
ことができる。As explained above, according to the present invention, there is provided a thermocouple whose measurement end faces the passage of the dilution gas to be measured, and a surface temperature between both measurement ends of the thermocouple that enables the dilution gas to be measured to burn. Since it is equipped with an electric heating means, it can be manufactured very easily. In addition, since the thermocouple itself does not generate heat, accurate measurements can be made, and since the thermocouple has a small heat capacity, the detection response speed can be improved, making it an outstanding instrument for measuring the calorific value of the diluted gas being measured. effect can be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明に係るカロリーメータの一実施例を示す断面
図である。 １・・・・送通管、２＠・・・通路、４・・・・熱電対
、４ａ　、　４ｂ　・・・・測定端、５・・・・白金フ
ィラメント、６・−・ｅ保温用のヒータ、７・・・・ヒ
ータコントローラ、ＳＧ　・・・・被測定希釈ガス。 特許出願人　山武ハネウェル株式会社 代理人山川政樹（はが１名）The figure is a sectional view showing an embodiment of a calorimeter according to the present invention. 1...Transmission tube, [email protected], 4...Thermocouple, 4a, 4b...Measurement end, 5...Platinum filament, 6...e Heat retention Heater, 7... Heater controller, SG... Dilution gas to be measured. Patent applicant: Yamatake Honeywell Co., Ltd. Agent Masaki Yamakawa (1 person)

Claims (1)

【特許請求の範囲】[Claims] 定流量で送給される被測定希釈ガスの通路が内部に形成
さ扛た送通管と、との送通管の側方に配置され前記通路
の上流および下流側にそｎぞれ測定端が臨む熱電対と、
こｎら測定端間に配置さｎ前記被測定希釈ガスを燃焼可
能にする表面温度をもった電熱手段と、前記送通管の入
口側に配置さｎヒータコントローラの制御により前記被
測定希釈ガスを一定温度に加熱する保温用のヒータとを
備えたことを特徴とするカロリーメータ。a passage pipe having a passage formed therein for the dilution gas to be measured to be supplied at a constant flow rate; and a measuring end disposed on the side of the passage pipe, and measuring ends on the upstream and downstream sides of the passage. The thermocouple facing the
An electric heating means having a surface temperature that enables combustion of the diluent gas to be measured is placed between these measurement ends, and an electric heating means is placed on the inlet side of the transmission pipe to heat the diluent gas to be measured under the control of a heater controller. A calorimeter comprising: a heat-retaining heater that heats the calorimeter to a constant temperature.
JP1237283A 1983-01-28 1983-01-28 Calorimeter Pending JPS59137848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1237283A JPS59137848A (en) 1983-01-28 1983-01-28 Calorimeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1237283A JPS59137848A (en) 1983-01-28 1983-01-28 Calorimeter

Publications (1)

Publication Number Publication Date
JPS59137848A true JPS59137848A (en) 1984-08-08

Family

ID=11803431

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1237283A Pending JPS59137848A (en) 1983-01-28 1983-01-28 Calorimeter

Country Status (1)

Country Link
JP (1) JPS59137848A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52134798A (en) * 1976-03-11 1977-11-11 Rockwell International Corp Sighting method and apparatus for composite of flowing gases
JPS5657941A (en) * 1979-10-16 1981-05-20 Keisebun:Kk Combustion meter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52134798A (en) * 1976-03-11 1977-11-11 Rockwell International Corp Sighting method and apparatus for composite of flowing gases
JPS5657941A (en) * 1979-10-16 1981-05-20 Keisebun:Kk Combustion meter

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