JPS63143408A - Coal burner of high fuel ratio - Google Patents
Coal burner of high fuel ratioInfo
- Publication number
- JPS63143408A JPS63143408A JP28806786A JP28806786A JPS63143408A JP S63143408 A JPS63143408 A JP S63143408A JP 28806786 A JP28806786 A JP 28806786A JP 28806786 A JP28806786 A JP 28806786A JP S63143408 A JPS63143408 A JP S63143408A
- Authority
- JP
- Japan
- Prior art keywords
- coal
- burner
- pulverized coal
- coal burner
- pulverized
- 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
- 239000003245 coal Substances 0.000 title claims abstract description 110
- 239000000446 fuel Substances 0.000 title claims abstract description 26
- 238000002485 combustion reaction Methods 0.000 claims abstract description 39
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 19
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 claims description 5
- 239000003830 anthracite Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000002678 semianthracite Substances 0.000 claims description 5
- 239000002802 bituminous coal Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 239000002245 particle Substances 0.000 abstract description 7
- 239000003063 flame retardant Substances 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 description 8
- 238000011105 stabilization Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 5
- 239000000295 fuel oil Substances 0.000 description 5
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000003442 weekly effect Effects 0.000 description 1
Landscapes
- Combustion Of Fluid Fuel (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、Ｉａ燃製の半無煙炭、無煙炭、低揮発分瀝青
炭を、重油などの助燃なしに安定燃焼させる高燃料比炭
バーナに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high fuel ratio coal burner that stably burns Ia fuel semi-anthracite coal, anthracite coal, and low volatile bituminous coal without auxiliary combustion such as heavy oil.
燃料として半無煙炭、無煙炭等を微粉状で浮遊燃焼させ
るボイラ等にあっては、燃料中の固定炭素が多く且つ揮
発分が少ない石炭性状を有するため、着火、保炎性に対
する配慮のほか、燃焼完遂の為に必要な炉内滞留時間を
長く取れる次の考慮が払われて来た。In boilers that use semi-anthracite, anthracite, etc. as a fuel in floating combustion in fine powder form, the fuel has a coal-like nature with a lot of fixed carbon and little volatile matter, so in addition to consideration for ignition and flame stability, combustion The following considerations have been made to increase the residence time in the furnace necessary for completion.
（１）垂直燃焼方式の採用
燃焼に必要な炉内滞留時間を確保するため火炉形状を１
−ツクリ型とし、火炉の肩から燃料を垂直に下向きに噴
出させて、炉内の火炎をＷ型フレームとして滞留時間の
確保をする。(1) Adoption of a vertical combustion method In order to ensure the residence time in the furnace necessary for combustion, the furnace shape was changed to 1.
- The fuel is jetted vertically downward from the shoulder of the furnace, and the flame inside the furnace is made into a W-shaped frame to ensure a sufficient residence time.
（２）微粉炭粒度を上げる。(2) Increase pulverized coal particle size.
（３）火炉内、バーナゾーン水冷壁部表面に断熱材を施
工することによって、バーナゾーンにおける雰囲気温度
を高め、もって、燃焼率を高めるだけでなく、着火性を
促進する。(3) By installing a heat insulating material on the surface of the water-cooled wall of the burner zone in the furnace, the atmospheric temperature in the burner zone is increased, thereby not only increasing the combustion rate but also promoting ignitability.
（４）重油等の着火性の優れた助燃用燃料を常時若干量
投入することによって保炎を行う。(4) Flame stabilization is carried out by always adding a small amount of auxiliary fuel with excellent ignitability such as heavy oil.
ことを概略骨子とした方法が採用されてきた。A method with this as a general outline has been adopted.
第６図は、従来技術になる半無煙炭、無煙炭焚きボイラ
構造例を、第７図〜第９〕図は、同じくバーナ構造例を
示す。第６図において微粉炭１は、１次空気によって空
気搬送され、微粉炭管２を経て、キャスタ（断熱材）８
に設けられた微粉炭ノズル３から、火炉４へ供給される
。微粉炭ノズル３の極く近くには、火炉４の緯入熱量の
１０〜３０％から成る重油（またはガス）が供給される
安定バーナ５が配置されており、安定バーナ火炎６の輻
射熱、および炉内雰囲気温度によって、前記微粉炭１の
粒子を加熱し着火して石炭火炎７を形成する。これらの
火炎は下方噴出としているためＵターンして炉内の上方
への流れへと変化して、Ｗ形の火炎を形成すると共に高
温での炉内滞留時間がＵターン分だけ長い結果、難燃性
燃焼にはふされしいものであった。FIG. 6 shows an example of the structure of a semi-anthracite or anthracite coal-fired boiler according to the prior art, and FIGS. 7 to 9 show examples of the burner structure. In FIG. 6, pulverized coal 1 is air conveyed by primary air, passed through pulverized coal pipe 2, and then passed through caster (insulating material) 8.
The pulverized coal is supplied to the furnace 4 from a nozzle 3 installed in the pulverized coal. A stable burner 5 is arranged very close to the pulverized coal nozzle 3 to which heavy oil (or gas) consisting of 10 to 30% of the weft heat input of the furnace 4 is supplied, and the radiant heat of the stable burner flame 6 and The particles of the pulverized coal 1 are heated and ignited by the furnace atmosphere temperature to form a coal flame 7. Since these flames eject downward, they make a U-turn and flow upwards inside the furnace, forming a W-shaped flame.As a result, the residence time in the furnace at high temperature is longer by the amount of the U-turn, resulting in difficulty. It was suitable for flammable combustion.
尚、図中９は過熱器、１０は灰処理ホッパ。In the figure, 9 is a superheater, and 10 is an ash processing hopper.
１１は起動用バーナ、１２は風箱であり、１３は風箱１
２から送り込まれる二次空気の空気ポートである。11 is a starting burner, 12 is a wind box, and 13 is a wind box 1
This is an air port for secondary air sent from 2.
第７図は第６図中のバーナの側面図、第８図は第７図の
縦断面図、第９図は第７図のバーナを下からみた図であ
る。尚、図中１４は水冷壁、２０は炉内再循環ガスであ
る。7 is a side view of the burner shown in FIG. 6, FIG. 8 is a longitudinal sectional view of FIG. 7, and FIG. 9 is a view of the burner shown in FIG. 7 viewed from below. In the figure, 14 is a water cooling wall, and 20 is a recirculated gas in the furnace.
一方、近年の燃料コストの高騰化に伴なって。On the other hand, with the rise in fuel costs in recent years.
これらの難燃性燃焼に対しても助燃用重油（またはガス
）なしに自燃させ、しかも出来るだけ、低負荷域まで助
燃なし運転が出来るバーナ設備が強く求められるように
なって来た。For these flame-retardant combustions, there has been a strong demand for burner equipment that can self-combust without the need for heavy oil (or gas) for combustion assistance, and that can operate without combustion assistance up to as low a load as possible.
しかし、従来技術から成る前記したバーナ設備では、微
粉炭の自燃化についての配慮はされていなかった。従っ
て、もし雰囲気温度（ボイラ負荷に比例する）が低下し
たり微粉濃度がうすくなると、吹き飛び燃焼したり失火
したりする危険性があり、火炉保護」二、着火保炎性の
良い重油、ガスの助燃を必要とするものであった。However, in the above-mentioned conventional burner equipment, no consideration was given to self-combustion of pulverized coal. Therefore, if the ambient temperature (proportional to the boiler load) decreases or the fine powder concentration decreases, there is a risk of blow-off combustion or misfire. It required auxiliary combustion.
従って上記従来技術は、難燃性微粉炭を助燃なしで自燃
させることについての配慮が不足し、よって高価な助燃
用燃料を使用する為燃料コス１−が高くなるという問題
があった。Therefore, the above-mentioned conventional technology lacks consideration for allowing the flame-retardant pulverized coal to self-combust without auxiliary combustion, and as a result, there is a problem in that the fuel cost 1- increases due to the use of expensive auxiliary combustion fuel.
すなわち本発明の目的は、バーナ構造および、バーナグ
ループの構造に工夫を加えることによって助燃なしの専
燃型微粉炭バーナ装置を提供することにある。That is, an object of the present invention is to provide a dedicated combustion type pulverized coal burner device without auxiliary combustion by adding innovation to the burner structure and the structure of the burner group.
上記の目的を達成する為に、本発明の高燃料比炭バーナ
はｆ記の特徴を有する。In order to achieve the above object, the high fuel ratio coal burner of the present invention has the characteristics described in f.
（１） 微粉炭バーナ入口に配置された微粉炭管内の
微粉炭の通過容斌を１０〜３０％と、９０〜７０％に二
分割する構造を有する。(1) It has a structure in which the passage capacity of pulverized coal in the pulverized coal pipe placed at the pulverized coal burner inlet is divided into two parts: 10 to 30% and 90 to 70%.
（２） 前記１０〜３０％の微粉炭は高濃度微粉で構
成され１強旋回型レジスタの安定用石炭バーナへ供給す
る。(2) The 10 to 30% pulverized coal is composed of highly concentrated fine powder and is supplied to a stabilizing coal burner of a one-strong swirl register.
（３）９０〜７０％の微粉炭は比較的低濃度微粉で構成
され、並行流且つ薄板状噴出バーナ構造から成る従来型
負荷用石炭バーナへ供給する。(3) 90-70% of the pulverized coal is composed of relatively low concentration of fines and is fed to a conventional load coal burner consisting of parallel flow and laminar jet burner construction.
（４） 前記安定用石炭バーナと、従来型負荷用石炭
バーナとの、構造の異る２種類のバーナを一対として、
点火及び消火することによって負荷の増減を行うことに
よって、安定用石炭バーナにより保炎を確保し、助燃用
燃料を廃止しコストを下げることを達成し、炉内滞留時
間を確保し火炉の有効利用率を高める。(4) A pair of two types of burners with different structures, the stabilization coal burner and the conventional load coal burner,
By increasing and decreasing the load by igniting and extinguishing the fire, flame stability is ensured by the stabilizing coal burner, reducing costs by eliminating auxiliary combustion fuel, ensuring residence time in the furnace, and making effective use of the furnace. increase rate.
前記２種類のバーナのうち安定用石炭バーナは。 Of the two types of burners mentioned above, the stabilizing coal burner is.
単独バーナ構造としては水平燃焼（瀝青炭燃焼）の技術
としてこれ迄かなり発達して来た。保炎のみに着眼すれ
ば。As a single burner structure, horizontal combustion (bituminous coal combustion) technology has been considerably developed. If we focus only on flame retention.
（イ）微粉炭濃度を高濃度にする。（ロ）微粉炭流速を
低くし最適化する。（低流速思考）（ハ）保炎リングを
取り付ける。（小さな渦の活用）（ニ）広角インペラを
採用する（バーナ下流に生ずる大きな熱ガス再循環流の
活用）、（ホ）燃焼用空気を強旋回する。などの技術に
よって、燃焼比７゜５程度迄の微粉炭を専燃し保炎でき
ることは工場内テストで確認されている。(b) Increase the pulverized coal concentration to a high concentration. (b) Lower and optimize the pulverized coal flow rate. (Low velocity thinking) (c) Attach the flame holding ring. (Use of small vortices) (d) Adopt a wide-angle impeller (use of large hot gas recirculation flow that occurs downstream of the burner), (e) Strongly swirl the combustion air. It has been confirmed in factory tests that pulverized coal with a combustion ratio of up to about 7.5 can be burned and flame-maintained using this technology.
しかし、この安定用石炭バーナは、広角火炎で貫通力（
炉内へ吹き込み力）がなく、短災である。However, this stabilizing coal burner has a wide-angle flame with a penetrating power (
There was no blowing force into the furnace, so it was a short disaster.
一方、薄板状の並行流から成る前記従来型負荷用石炭バ
ーナは１貫通力があり、火炎の炉内滞留時間は確保でき
るものの、保炎性には欠点がある。On the other hand, although the conventional load coal burner, which is composed of thin plate-like parallel flow, has a penetration force of 1, and can secure the residence time of the flame in the furnace, it has a drawback in flame stabilization.
従って自燃性に欠け、助燃燃料を必要とした。Therefore, it lacked self-combustibility and required auxiliary combustion fuel.
本発明では、両者のバーナを組み合わせて１対で運転す
るので、安定用石炭バーナは保炎用にのみ動作させ、そ
れによって従来型負荷用石炭バーナを着火させるので、
保炎が確保され、且つ炉内滞留時間も従来型負荷用石炭
バーナ側で維持されるので、助燃なし、高燃料比炭燃焼
を達成し、助燃料が必要とすることはない。In the present invention, since both burners are combined and operated as a pair, the stabilizing coal burner is operated only for flame stabilization, thereby igniting the conventional load coal burner.
Since flame holding is ensured and the residence time in the furnace is maintained on the conventional loading coal burner side, coal combustion with a high fuel ratio is achieved without auxiliary combustion, and no auxiliary fuel is required.
本発明の一実施例になる高燃料比炭バーナの構造を第１
図および第２図により説明する。第１図において第６図
〜第９図と同一符号（′をつけて区別する）を付した部
分は同一機能で同一名称の部分を示す。A first embodiment of the structure of a high fuel ratio coal burner according to the present invention is described below.
This will be explained with reference to the drawings and FIG. In FIG. 1, parts with the same reference numerals (distinguished by adding ') as in FIGS. 6 to 9 indicate parts with the same function and the same name.
要するに本実施例のポイントとなる第１の点は、バーナ
入口微粉炭管を１例えば管内に生ずる微粉炭の偏流（慣
性力）を活用して高濃度側と低濃度側とに分岐し、高濃
度側を安定バーナへ、低濃度側を主バーナへ別けたこと
である。第２の点は、従来技術において助燃バーナとし
て配置されていたバーナを、起動用油バーナと安定用石
炭バーナから成る強旋回型エアレジスタ構造とし、微粉
炭の保炎の為に必要な全ゆる方策（広角インペラ。In short, the first point of this embodiment is that the burner inlet pulverized coal pipe is branched into a high-concentration side and a low-concentration side, for example, by utilizing the drift (inertial force) of the pulverized coal that occurs inside the pipe. The high concentration side is divided into a stable burner and the low concentration side is divided into a main burner. The second point is that the burner, which was arranged as an auxiliary burner in the conventional technology, has been changed to a strong swirling air register structure consisting of a starting oil burner and a stabilizing coal burner. Strategy (wide angle impeller.
保炎リング等）を採り入れたことであ゛る。第３の点は
、燃焼の為に必要な炉内高温域での滞留時間を確保する
為、従来型負荷用バーナのである並行流薄板状バーナを
主バーナとして有せしめたこと。This is due to the adoption of flame-holding rings, etc.). The third point is that the main burner is a parallel-flow thin plate burner, which is a conventional load burner, in order to ensure the residence time in the high-temperature region inside the furnace necessary for combustion.
第４の点は、これらの安定用石炭バーナと従来型負荷用
バーナを、一対として点、消火できるようにしたことで
ある。The fourth point is that the stabilizing coal burner and the conventional load burner can be extinguished as a pair.
具体的な実施例を第１図〜第５図により説明する。第１
図において微粉炭機出口からの微粉炭１′は、バーナ入
口の微粉炭管に沿って高濃度側微粉炭管２″と、低濃度
側の微粉炭管２′に分流して安定用石炭バーナの微粉炭
ノズル５′および従来型負荷用石炭バーナの微粉炭ノズ
ル３′へ供給される。容量配分は、取扱う石炭の種類に
よって請求範囲に示す範囲で定める。微粉濃度を濃淡化
する方法には、例えば第３図〜第５図に示されるように
、微粉炭の慣性力を応用した方法が在り、微粉炭を濃淡
化して分離できる。バーナは１強旋回により燃焼用空気
を供給され、て且つ後記する広角インペラ等を有する安
定用石炭バーナ５′と。A specific example will be explained with reference to FIGS. 1 to 5. 1st
In the figure, pulverized coal 1' from the pulverized coal machine outlet is divided into a high concentration side pulverized coal pipe 2'' and a low concentration side pulverized coal pipe 2' along the pulverized coal pipe at the burner inlet, and then flows into the stabilizing coal burner. is supplied to the pulverized coal nozzle 5' of the conventional load coal burner and the pulverized coal nozzle 3' of the conventional load coal burner.The capacity distribution is determined according to the type of coal to be handled within the range shown in the claims. For example, as shown in Figures 3 to 5, there is a method that utilizes the inertial force of pulverized coal, and the pulverized coal can be concentrated and separated. and a stabilizing coal burner 5' having a wide-angle impeller, etc., which will be described later.
並行流の燃焼用空気流れをもつ薄板状石炭噴出ノズルを
有する従来型負荷用石炭バーナ３′が一対で構成されて
いる。燃焼用空気は、燃焼空気開閉ダンパー１４′を開
閉することによって点火時は開、消火時は開でコン１−
ロールされるよう予め制御装置が設定されている。A pair of conventional load coal burners 3' having laminar coal injection nozzles with parallel combustion air flows are constructed. Combustion air is supplied to the controller 1- by opening and closing the combustion air opening/closing damper 14'.
The control device is preset to roll.
まず、高濃度側の安定用石炭バーナについて説明すると
下記の様な作用により安定火炎を形成する。First, the stabilizing coal burner on the high concentration side will be explained. A stable flame is formed by the following actions.
すなわち第２図において、微粉炭１′は、高濃度側の微
粉炭管２″から微粉炭ノズル３″を通って、先端に取付
けた保炎用広角インペラ１０’ を経て図中の矢印で示
すように、広角で火炉４″へ噴出される。この時、噴流
の発達に伴ない微粉炭をまき込んで、炉内熱ガスがエン
トレインメント（ｅｕｔｒａ、ｉｎｍｅｎｔ）によって
大きな再循環流（図中黒矢印で示す） ｌ ３ ”を生
ずる。That is, in Fig. 2, pulverized coal 1' passes from the pulverized coal pipe 2'' on the high concentration side, passes through the pulverized coal nozzle 3'', and passes through the wide-angle impeller 10' for flame stabilization attached to the tip, as indicated by the arrow in the figure. At this time, as the jet develops, pulverized coal is thrown in, and the hot gas inside the furnace is ejected into a large recirculation flow (black in the figure) due to entrainment. (indicated by the arrow) l 3 ”.
また、再循環流は風箱１２′から強旋回型エアレジスタ
を通過して旋回流（図中白矢印で示す）を形成し、バー
ナノズル下流の熱ガス＋＋ｊ循環ｄεをより強固なもの
にする。尚、第２図中１５′は旋回力調整リンク、１６
′は風域配分調整リンク。Further, the recirculation flow passes through the strongly swirling air register from the wind box 12' to form a swirling flow (indicated by a white arrow in the figure), thereby making the hot gas ++j circulation dε downstream of the burner nozzle more robust. In addition, 15' in Fig. 2 is the turning force adjustment link, and 16
′ is the wind area distribution adjustment link.
１７″は燃焼用空気、１８′は強旋回用エアレジスタで
ある。17'' is combustion air, and 18' is an air register for strong swirling.
この様に、火炉内の炉内熱ガスの再循環流によって微粉
炭は加熱され、微粉炭の粒子が着火温度以上になって火
炎を形成するものである。In this way, the pulverized coal is heated by the recirculation flow of the hot gas inside the furnace, and the particles of the pulverized coal rise to a temperature higher than the ignition temperature to form a flame.
この時、微粉炭粒子が着火温度にまで、加熱されるには
、微粉炭濃度が濃く粒径が細かいほど効率がよく、これ
により低負荷域（炉内熱ガス温度が低い）の安定火炎が
得られる。しかし、この安定用石炭バーナは安定性はよ
いが火←炎が旋回流火炎を形成し広角で且つ短炎化とな
る特徴をもつので、燃焼率を高める為に必要な、高温域
での炉内滞留時間が十分とれないので、火炉の右動利用
率は低下する。そこで安定用石炭バーナの容量は、保炎
のみに必要な量、すなわち石炭バーナ全入熱斌の１０〜
３０％とし、他方隣接して設ける従来型負荷用石炭バー
ナの容量を９０〜７０％とし、該従来型負荷用石炭バー
ナは、燃焼用空気および燃料とも並行流で噴出させるも
のである。At this time, the higher the concentration of pulverized coal and the finer the particle size, the more efficient it is to heat the pulverized coal particles to the ignition temperature. can get. However, although this stabilizing coal burner has good stability, it has the characteristic that the flame forms a swirling flame and has a wide angle and short flame, so it is necessary to use a furnace in a high temperature range to increase the combustion rate. Since there is not enough residence time in the furnace, the right-hand utilization rate of the furnace decreases. Therefore, the capacity of the stabilizing coal burner is the amount necessary only for flame stabilization, that is, 10 to
30%, and the capacity of an adjacent conventional load coal burner is 90 to 70%, and the conventional load coal burner blows out combustion air and fuel in parallel flow.
従来型負荷用石炭バーナからの火炎は、安定用石炭バー
ナの火炎の燃焼熱および炉内熱ガスによって下方向へ発
達しながら噴き込まれる。従来型負荷用石炭バーナの噴
出口は、薄板状となっており１表面積を広く取る等の工
夫が加えられているので、比較的低濃度の微粉炭でも火
炉の広い空間を利用して、燃焼が完遂されるものとなる
。つまり本発明は、一対のバーナの各々の特徴を生かし
、週燃性の高燃料比炭を、安定にして高効率で燃焼させ
るにふされしいものである。The flame from the conventional load coal burner is injected while developing downward by the combustion heat of the flame of the stabilizing coal burner and the hot gas in the furnace. The spout of conventional load coal burners has a thin plate shape and has been designed to have a large surface area, so even relatively low concentration pulverized coal can be burned by utilizing the large space of the furnace. will be completed. In other words, the present invention is suitable for stably and highly efficiently burning weekly combustible high fuel ratio coal by taking advantage of the characteristics of each of the pair of burners.
最近、石油コークス（燃料比的６．５〜８．５）を微粉
炭燃焼させるテス１−を行ない、強旋回レジスタ、広角
インペラ、保炎リングの採用組合せにより、この程度の
高燃料比炭でも自燃は可能であるとの確認が得られた。Recently, we conducted a test 1 in which petroleum coke (fuel ratio 6.5 to 8.5) was burned with pulverized coal, and with the combination of a strong swirl register, wide-angle impeller, and flame-holding ring, even coal with such a high fuel ratio can be used. It was confirmed that self-combustion is possible.
〔発明の効果〕
本発明によれば
（１）低揮発分瀝青炭、半無煙炭、無煙炭といった難燃
性石炭に対し、安定用の重油、ガスと云った助燃料が不
要となり、低コスト運転が可能である。[Effects of the Invention] According to the present invention, (1) low-volatile bituminous coal, semi-anthracite coal, anthracite coal, and other flame-retardant coals do not require auxiliary fuels such as heavy oil and gas for stabilization, allowing low-cost operation. It is.
（２）保炎が安定用石炭バーナによって確保できるので
火炉保護上、有効である。(2) Flame stability can be ensured by the stabilizing coal burner, which is effective in protecting the furnace.
（３） 負荷による火炎安定範囲が広く、負荷運用性
がよい（油切替え操作が不要）。(3) Wide flame stability range depending on the load and good load operability (no oil switching required).
等の効果をもつものである。It has the following effects.
第１図：本発明のボイラ及びバーナ構造実施例を示す図
、
第２図：本発明に適用できる安定バーナ構造実施例を示
す図、
第３図〜第５図：１１ｆ粉炭を高濃度と低濃度に分ける
ための装置の例を示す図。
第６図；従来技術によるボイラ及びバーナ構造を示す図
、
第７図：第６図の側面図。
第８図：第７図の縦断面図、
第９図：第７図のバーナを下から見た図である。
１．１′・・・・・・微粉炭
２．２’２”・・・・・・微粉炭管
３．３′・・・・・・微粉炭ノズル
４．４′・・・・・・火炉
５．５′・・・・・・安定用石炭バーナ６．６′・・・
・・・安定用石炭バーナ火災７．７′・・・・・・石炭
火災
８．８′・・・・・・キャスタ
ＥＬ９’・・・・・・過熱器
１０、ｔｏ’・・・・・・灰処理ホッパ１１．１１’
・・・・・・起動用バーナ１２．１２’・・・・・・風
箱
１３．１３’・・・・・・二次空気ポート１４′・・・
・・・水冷壁
１４′・・・・・・燃焼空気開閉ダンパ１５′・・・・
・・旋回力調整リング
１６′・・・・・・風量配分調整リング１７′・・・・
・・燃焼用空気
１８′・・・・・・強旋回用エアレジスタ。Figure 1: A diagram showing an example of the boiler and burner structure of the present invention, Figure 2: A diagram showing an example of a stable burner structure applicable to the present invention, Figures 3 to 5: 11f pulverized coal with high concentration and low concentration. The figure which shows the example of the apparatus for dividing into concentration. FIG. 6: A diagram showing a boiler and burner structure according to the prior art. FIG. 7: A side view of FIG. 6. FIG. 8: A longitudinal cross-sectional view of FIG. 7. FIG. 9: A view of the burner of FIG. 7 viewed from below. 1.1'... Pulverized coal 2.2'2"... Pulverized coal pipe 3.3'... Pulverized coal nozzle 4.4'... Furnace 5.5'... Stabilization coal burner 6.6'...
...Stabilizing coal burner fire 7.7'... Coal fire 8.8'... Caster EL9'... Superheater 10, to'...・Ash processing hopper 11.11'
...Starting burner 12.12'... Wind box 13.13'... Secondary air port 14'...
...Water cooling wall 14'... Combustion air opening/closing damper 15'...
...Turning force adjustment ring 16'...Air volume distribution adjustment ring 17'...
...Combustion air 18'...Air register for strong turning.
Claims (1)
ら成る低揮発分瀝青炭、半無煙炭および無煙炭を燃焼さ
せる垂直燃焼型バーナ装置において、バーナ入口微粉炭
管曲管部の慣性力によって当該微粉炭管の１０〜３０％
容量をもつ高濃度微粉を選択的に旋回型の安定用石炭バ
ーナへ供給し、残る９０〜７０％の低濃度微粉を薄板状
並行流型の従来型負荷用石炭バーナへ供給し、安定用石
炭バーナと従来型負荷用石炭バーナを一対として運転す
ることを特徴とした微粉炭バーナ。In a vertical combustion burner device that burns low-volatile bituminous coal, semi-anthracite, and anthracite with a fuel ratio (fixed carbon/volatile content) of 4.0 to 7.0, the inertia of the curved part of the pulverized coal pipe at the burner inlet 10-30% of the pulverized coal pipe depending on the force
High-concentration fine powder with a capacity is selectively supplied to a rotating type stabilizing coal burner, and the remaining 90 to 70% of low-concentration fine powder is supplied to a thin plate-like parallel flow type conventional loading coal burner. A pulverized coal burner characterized by operating a burner and a conventional load coal burner as a pair.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28806786A JPS63143408A (en) | 1986-12-03 | 1986-12-03 | Coal burner of high fuel ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28806786A JPS63143408A (en) | 1986-12-03 | 1986-12-03 | Coal burner of high fuel ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63143408A true JPS63143408A (en) | 1988-06-15 |
Family
ID=17725390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28806786A Pending JPS63143408A (en) | 1986-12-03 | 1986-12-03 | Coal burner of high fuel ratio |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63143408A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6155183A (en) * | 1996-01-31 | 2000-12-05 | A E P Resources Service Company | Method and apparatus for reducing NOx emissions from a multiple-intertube pulverized-coal burner |
| CN1333199C (en) * | 2005-05-23 | 2007-08-22 | 哈尔滨工业大学 | W-shape flame furnace with gradation coal burner |
| CN101865456A (en) * | 2010-07-16 | 2010-10-20 | 贵州电力试验研究院 | High combustion performance slot burner W-shaped flame boiler and its preparation method |
| CN105114974A (en) * | 2015-06-12 | 2015-12-02 | 重庆大学 | A Method of Obtaining a Stable Cold Flame by Adding O3 and CH3OH |
| CN110887037A (en) * | 2019-12-19 | 2020-03-17 | 沈阳环境科学研究院 | Low-nitrogen combustion device for enhancing pulverized coal gasification |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145810A (en) * | 1982-02-22 | 1983-08-31 | Babcock Hitachi Kk | Combustion of coal |
| JPS58193006A (en) * | 1982-05-06 | 1983-11-10 | Babcock Hitachi Kk | Burner for ground coke |
| JPS61291807A (en) * | 1985-06-20 | 1986-12-22 | Mitsubishi Heavy Ind Ltd | Boiler |
-
1986
- 1986-12-03 JP JP28806786A patent/JPS63143408A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58145810A (en) * | 1982-02-22 | 1983-08-31 | Babcock Hitachi Kk | Combustion of coal |
| JPS58193006A (en) * | 1982-05-06 | 1983-11-10 | Babcock Hitachi Kk | Burner for ground coke |
| JPS61291807A (en) * | 1985-06-20 | 1986-12-22 | Mitsubishi Heavy Ind Ltd | Boiler |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6155183A (en) * | 1996-01-31 | 2000-12-05 | A E P Resources Service Company | Method and apparatus for reducing NOx emissions from a multiple-intertube pulverized-coal burner |
| CN1333199C (en) * | 2005-05-23 | 2007-08-22 | 哈尔滨工业大学 | W-shape flame furnace with gradation coal burner |
| CN101865456A (en) * | 2010-07-16 | 2010-10-20 | 贵州电力试验研究院 | High combustion performance slot burner W-shaped flame boiler and its preparation method |
| CN105114974A (en) * | 2015-06-12 | 2015-12-02 | 重庆大学 | A Method of Obtaining a Stable Cold Flame by Adding O3 and CH3OH |
| CN110887037A (en) * | 2019-12-19 | 2020-03-17 | 沈阳环境科学研究院 | Low-nitrogen combustion device for enhancing pulverized coal gasification |
| CN110887037B (en) * | 2019-12-19 | 2024-05-24 | 沈阳环境科学研究院 | A low nitrogen combustion device for enhancing coal pulverization gasification |
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