JP7078708B2 - Flue gas mixer and method - Google Patents

Flue gas mixer and method Download PDF

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JP7078708B2
JP7078708B2 JP2020503915A JP2020503915A JP7078708B2 JP 7078708 B2 JP7078708 B2 JP 7078708B2 JP 2020503915 A JP2020503915 A JP 2020503915A JP 2020503915 A JP2020503915 A JP 2020503915A JP 7078708 B2 JP7078708 B2 JP 7078708B2
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flue gas
segment
flue
throat
annular
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JP2020528343A (en
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朱廷▲ギュ▼
徐文青
李超群
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Institute of Process Engineering of CAS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
    • B01F23/10—Mixing gases with gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
    • B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
    • B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B01F25/31425—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the axial and circumferential direction covering the whole surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/21—Measuring
    • B01F35/2132—Concentration, pH, pOH, p(ION) or oxygen-demand
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
    • B01F35/20—Measuring; Control or regulation
    • B01F35/22—Control or regulation
    • B01F35/2201—Control or regulation characterised by the type of control technique used
    • B01F35/2202—Controlling the mixing process by feed-back, i.e. a measured parameter of the mixture is measured, compared with the set-value and the feed values are corrected
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Treating Waste Gases (AREA)

Description

本発明は、ガス混合技術分野に関し、例えば煙道ガス混合装置及び方法に関する。 The present invention relates to the art of gas mixing, eg, flue gas mixing devices and methods.

燒結煙道ガス循環プロセスとは、燒結過程で排出された一部の熱伝導ガスを燒結イグナイターの後の台車へ戻って循環使用する燒結方法である。関連技術における燒結煙道ガス循環プロセスには、いずれも煙道ガス循環において燒結鉱物品質を保証するために、循環煙道ガスの中に十分な酸素が含有されることを保証すべきであることが提出されているため、プロセス設計において一般的には環状冷却器が生じた排気ガスを利用して、燒結煙道ガスにおける酸素含有量を補足する。 The sinter flue gas circulation process is a sintering method in which a part of the heat conductive gas discharged in the sintering process is returned to the trolley after the sintering igniter and circulated for use. All of the flue gas circulation processes in the related technology should ensure that the circulating flue gas contains sufficient oxygen to ensure the quality of the flue gas in the flue gas circulation. Is submitted, the process design generally utilizes the exhaust gas produced by the annular cooler to supplement the oxygen content in the flue gas.

図１は、関連技術における煙道ガス循環の典型的なプロセスフローチャートであり、図１に示す機器は、環状冷却器１’、環状冷却循環送風機１１’、煙道ガス混合器２’、煙道ガスシールカバー３１’、燒結機３２’、除塵器４’、燒結循環送風機４１’、燒結メイン吸引機４２’、脱硫塔５’、煙突６’及び機器の間を連結する管路を有する。上記燒結工程、燒結煙道ガス処理工程及び煙道ガス循環プロセスの作動手順は以下の通りである。材料は燒結機３２’で燒結され、燒結機３２’から取り外された燒結熱鉱は、環状冷却器１’により冷却された後に環状冷却排気ガスを生じ、環状冷却排気ガスは、環状冷却循環送風機１１’により加圧された後、燒結機３２’から取り込んだ、燒結循環送風機４１’により増圧された循環煙道ガスと共に、煙道ガス混合器２’に入り、且つさらに燒結機３２’の上方に位置する煙道ガスシールカバー３１’を通過して燒結機３２’に入る。燒結機３２’が生じる煙道ガス（非循環煙道ガス）の大部分は、除塵器４’を通過し、燒結メイン吸引機４２’により加圧されて脱硫塔５’及び煙突６’に搬送され、最後に排出される。そのうち、環状冷却循環送風機及び煙道ガス混合器は、連携して環状冷却排気ガス及び循環煙道ガスの混合を実現するが、空気の補足は、煙道ガスシールカバーに通気弁を設けることにより実現することが多い。 FIG. 1 is a typical process flow chart of flue gas circulation in a related technique, and the equipment shown in FIG. 1 is an annular cooler 1', an annular cooling circulation blower 11', a flue gas mixer 2', and a flue gas. It has a gas seal cover 31', a flue gas 32', a dust remover 4', a flue circulation blower 41', a flue main suction machine 42', a desulfurization tower 5', a flue gas 6', and a pipeline connecting the equipment. The operation procedure of the above-mentioned sintering step, flue gas treatment step and flue gas circulation process is as follows. The material was sintered by the sinter 32', and the sinter hot ore removed from the sinter 32' produced an annular cooling exhaust gas after being cooled by the annular cooler 1', and the annular cooling exhaust gas was an annular cooling circulation blower. After being pressurized by 11', it enters the flue gas mixer 2'with the circulating flue gas taken in from the sinter 32'and boosted by the sinter circulation blower 41', and further of the sinter 32'. It passes through the flue gas seal cover 31'located above and enters the firing machine 32'. Most of the flue gas (non-circulating flue gas) generated by the flue gas 32'passes through the dust remover 4', is pressurized by the flue main suction machine 42', and is transported to the desulfurization tower 5'and the chimney 6'. And finally discharged. Among them, the annular cooling circulation blower and the flue gas mixer cooperate to realize the mixing of the annular cooling exhaust gas and the circulating flue gas, but the air is supplemented by providing a vent valve on the flue gas seal cover. Often realized.

同時に、混合する必要な二本の煙道ガスの圧力、温度、流量及び成分などがいずれも異なるので、関連技術における煙道ガス混合装置は以下の問題が存在している。例えば三方煙道の混合装置は、煙道及びそのエルボの空間が限られるので、二本の気流が混合する過程において気流が偏向渦し、煙道が摩耗され、灰集積及び混合効果が悪いなどの問題が存在しており、さらに気流逆吸いが発生し、煙道ガス循環送風機の振動悪化及び失速不安定などの作業事故を引き起こす。複数の混合キャビティの混合装置及び変径混合ドラムの混合装置は煙道ガスを十分に混合することができるが、両方がいずれも塵含有量の大きい煙道ガスに適しない。したがって、低抵抗であり且つ煙道の煙道ガス成分及び煙道ガス温度を便利に調節し、煙道ガスの流量を安定化させ、煙道の集灰及び摩耗を回避し、送風機及び付属煙道などの機器を保護することができる煙道ガス混合装置の設計は、煙道ガス循環プロセスの安定及び効率的な動作に対して意義が重大である。 At the same time, the pressure, temperature, flow rate, composition, etc. of the two flue gases required to be mixed are different, so that the flue gas mixing device in the related technique has the following problems. For example, in a three-way flue mixing device, the space of the flue and its elbow is limited, so that the airflow is deflected and swirled in the process of mixing the two airflows, the flue is worn, and the ash accumulation and mixing effect are poor. In addition, the back suction of the airflow occurs, causing work accidents such as deterioration of vibration of the flue gas circulation blower and unstable stall. Mixers with multiple mixing cavities and mixers with variable diameter mixing drums can mix flue gas well, but neither is suitable for flue gas with a high dust content. Therefore, it has low resistance and conveniently regulates the flue gas component and flue gas temperature of the flue gas, stabilizes the flow rate of flue gas, avoids ash collection and wear of the flue gas, and blowers and attached flue gas. The design of a flue gas mixer that can protect equipment such as roads is of great significance for the stable and efficient operation of the flue gas circulation process.

同時に、関連技術における煙道ガス循環プロセスは、シールカバーから空気を直接補充し、シールカバー空間が大きいので、シールカバー内のガスは短い滞留時間内に燒結床層に吸入されて燃焼反応に参加することで、このような方式は、酸素が循環煙道ガスに不均一に混合する問題が存在し、即ち空気インレットに近づく領域に酸素含有量が高いが、空気インレットに遠ざかる領域に酸素含有量が低く（または低酸素不感帯と称する）、このような低酸素不感帯の存在は燒結生産にかなり不利である。したがって、適正な技術的手段によって補足的に入る空気により運んだ酸素を循環煙道ガスに均一に混合させることも煙道ガス循環プロセスの安定性を向上する重要なポイントである。 At the same time, the flue gas circulation process in the related technology replenishes air directly from the seal cover, and because the seal cover space is large, the gas in the seal cover is sucked into the smoldering bed layer within a short residence time and participates in the combustion reaction. Therefore, such a method has a problem that oxygen is mixed unevenly with the circulating flue gas, that is, the oxygen content is high in the region near the air inlet, but the oxygen content is in the region away from the air inlet. Low (or referred to as the low oxygen insensitive zone), the presence of such a low oxygen insensitive zone is a significant disadvantage to the smoldering production. Therefore, it is also an important point to improve the stability of the flue gas circulation process to uniformly mix the oxygen carried by the air supplemented by appropriate technical means with the circulating flue gas.

本発明は、煙道ガス混合装置及び方法を提供し、関連技術における煙道ガス混合装置のエネルギー消費が高く、煙道ガス混合効果が不良であるという問題を解決することができる。煙道ガス混合装置は、
煙道入口セグメントと、
側壁に複数の吸入孔が周設されたスロートセグメントと、
スロートセグメントの外周に設けられた環状キャビティと、
環状キャビティに連結された環状冷却排気ガス支管と、
煙道出口セグメントと、
煙道入口セグメントとスロートセグメントとの間に連結されたネッキングセグメントと、
スロートセグメントと煙道出口セグメントとの間に連結されたフレアセグメントとを含む。 The present invention provides a flue gas mixing device and a method, and can solve the problems that the energy consumption of the flue gas mixing device is high and the flue gas mixing effect is poor in the related art. The flue gas mixer is
Flue entrance segment and
A throat segment with multiple suction holes on the side wall,
An annular cavity provided on the outer circumference of the throat segment,
An annular cooling exhaust gas branch pipe connected to the annular cavity,
Flue exit segment and
The necking segment connected between the flue inlet segment and the throat segment,
Includes a flare segment linked between the throat segment and the flue exit segment.

一実施例において、吸入孔の軸線とスロートセグメントの軸線との夾角は２０°～９０°である。 In one embodiment, the angle between the axis of the suction hole and the axis of the throat segment is 20 ° to 90 °.

一実施例において、環状冷却排気ガス支管の軸線とスロートセグメントの軸線との夾角は１５°～７５°である。 In one embodiment, the angle between the axis of the annular cooling exhaust gas branch pipe and the axis of the throat segment is 15 ° to 75 °.

一実施例において、環状キャビティの断面は台形構造であり、且つ台形構造の角部は円弧形遷移面を有する。 In one embodiment, the cross section of the annular cavity is a trapezoidal structure, and the corners of the trapezoidal structure have an arcuate transition surface.

一実施例において、空気支管及び制御モジュールをさらに含み、空気支管の軸線とスロートセグメントの軸線との夾角は３０°～９０°であり、空気支管は電動バルブを含み、電動バルブは制御モジュールに電気的に接続されている。 In one embodiment, the air branch pipe and the control module are further included, the angle between the axis of the air branch pipe and the axis of the throat segment is 30 ° to 90 °, the air branch pipe includes an electric valve, and the electric valve is electric to the control module. Is connected.

一実施例において、煙道出口セグメントに設けられた酸素含有量モニタをさらに含み、酸素含有量モニタは制御モジュールに電気的に接続されている。 In one embodiment, an oxygen content monitor provided in the flue outlet segment is further included, the oxygen content monitor being electrically connected to the control module.

一実施例において、煙道出口セグメントの底部に設けられた灰バケツをさらに含む。 In one embodiment, an ash bucket provided at the bottom of the flue outlet segment is further included.

一実施例において、煙道出口セグメントの直径は煙道入口セグメントの直径よりも大きい。 In one embodiment, the diameter of the flue outlet segment is larger than the diameter of the flue inlet segment.

煙道ガス混合方法は、
煙道入口セグメントへ煙道ガスを導入することと、
環状冷却排気ガス支管に環状冷却排気ガスを導入することと、
環状冷却排気ガスが環状キャビティ及び吸入孔を順次通過した後、煙道ガスと混合して混合ガスを形成することとを含む。 The flue gas mixing method is
Introducing flue gas into the flue inlet segment and
Introducing annular cooling exhaust gas into the annular cooling exhaust gas branch pipe,
It involves sequentially passing the annular cooling exhaust gas through the annular cavity and the suction hole and then mixing with the flue gas to form a mixed gas.

一実施例において、前記環状冷却排気ガスと前記煙道ガスとを混合した後に、混合ガスの酸素含有量に対して監視を行うことと、
前記酸素含有量により、環状キャビティ内に吸入された空気の吸入量をリアルタイムに調整することとをさらに含む。 In one embodiment, after mixing the annular cooling exhaust gas and the flue gas, the oxygen content of the mixed gas is monitored.
The oxygen content further includes adjusting the inhaled amount of air sucked into the annular cavity in real time.

本発明の煙道ガス混合装置及び方法は、関連技術における煙道ガス混合装置のエネルギー消費が高く、煙道ガス混合効果が不良であるという問題を解決することができる。 The flue gas mixing device and method of the present invention can solve the problem that the energy consumption of the flue gas mixing device in the related technique is high and the flue gas mixing effect is poor.

図１は関連技術の燒結煙道ガス循環プロセスフロー模式図である。FIG. 1 is a schematic diagram of a flue gas circulation process flow of a related technique. 図２は一実施例に係る煙道ガス混合装置の平面図である。FIG. 2 is a plan view of the flue gas mixer according to the embodiment. 図３は一実施例に係る煙道ガス混合装置の正面図である。FIG. 3 is a front view of the flue gas mixing device according to the embodiment. 図４は一実施例に係る燒結煙道ガス循環プロセスのプロセスフロー模式図である。FIG. 4 is a schematic process flow diagram of a flue gas circulation process according to an embodiment. 図５は一実施例に係る煙道ガス混合方法のフローチャートである。FIG. 5 is a flowchart of the flue gas mixing method according to the embodiment.

図２に示すように、図２は一実施例に係る煙道ガス混合装置の平面図であり（図に空気支管を表示していない）、煙道ガス混合装置の本体はベンチュリ管（Ｖｅｎｔｕｒｉ ｔｕｂｅ）構造であり、且つ煙道ガスの流れ方向に沿って煙道入口セグメント１１、ネッキングセグメント２１、スロートセグメント２２、フレアセグメント２３及び煙道出口セグメント１２が順に設けられている。吸入孔２２１は、均一で且つ傾斜してスロートセグメント２２の周方向側壁に周設されており、スロートセグメント２２の周方向から外へ環状キャビティ３が延在され、環状キャビティ３はスロートセグメント２２全体の外部に被覆し、環状キャビティ３の内部にガスを収容する空間が形成されている。環状キャビティ３の断面は円形構造であってもよいし、台形構造であってもよい。例示的には、本実施例において、環状キャビティ３の断面は台形構造であり、環状キャビティ３の断面が台形構造であると、台形構造の角部は円弧形遷移面を有することで、環状キャビティ３内に灰集積の死角が存在せず、環状キャビティ３の内部に吸入された気流がスムーズであることを保障するとともに、環状キャビティ３の内壁の灰集積を防止することができる。 As shown in FIG. 2, FIG. 2 is a plan view of the flue gas mixer according to the embodiment (the air branch pipe is not shown in the figure), and the main body of the flue gas mixer is a Venturi tube. ), And the flue gas inlet segment 11, the necking segment 21, the throat segment 22, the flare segment 23, and the flue outlet segment 12 are provided in this order along the flow direction of the flue gas. The suction hole 221 is uniformly and inclined so as to be provided around the circumferential side wall of the throat segment 22, and the annular cavity 3 extends outward from the circumferential direction of the throat segment 22, and the annular cavity 3 is the entire throat segment 22. A space for accommodating gas is formed inside the annular cavity 3 by covering the outside of the annular cavity 3. The cross section of the annular cavity 3 may have a circular structure or a trapezoidal structure. Illustratively, in this embodiment, when the cross section of the annular cavity 3 has a trapezoidal structure and the cross section of the annular cavity 3 has a trapezoidal structure, the corners of the trapezoidal structure have an arcuate transition surface, whereby the annular shape is formed. There is no blind spot for ash accumulation in the cavity 3, it is possible to ensure that the airflow sucked into the annular cavity 3 is smooth, and it is possible to prevent ash accumulation on the inner wall of the annular cavity 3.

環状キャビティ３が外へ延在して環状冷却排気ガス支管３１が形成され、吸入孔２２１はいずれも環状キャビティ３及び環状冷却排気ガス支管３１に連通され、且つ環状冷却排気ガス支管３１は傾斜して環状キャビティ３に設けられ、このように設計することにより、環状冷却排気ガスはまず環状冷却排気ガス支管３１から環状キャビティ３に吸入され、さらに均一で且つ傾斜してスロートセグメント２２の周方向側壁に分布された吸入孔２２１により煙道ガスメイン通路に吸入されることで、スロートセグメント２２の全周に亘って均一に吸入することを実現し、流入煙道ガスに対する緩衝及び圧力安定化も実現し、且つ環状キャビティ３と煙道ガスメイン通路に安定差圧を形成させ、煙道ガスメイン通路流動場の均一安定性を維持する。好ましくは、環状キャビティ３内に環状冷却排気ガスが充満することを利用し、スロートセグメント２２のすべての吸入孔２２１を十分に利用して吸入することにより、環状冷却排気ガスは吸入孔２２１を通過すると加速が発生し、さらに流入煙道ガスに対するガイド作用を実現することができる。また、スロートセグメント２２における吸入孔２２１は傾斜して設けられ、環状冷却排気ガスを予め設けられた角度で流入煙道ガスと合流させることができ、環状冷却排気ガスの流入煙道ガスに対する直接な衝撃を回避することで、流入煙道ガスの流動に対する影響を減少し、且つ引き込まれたガスと流入煙道ガスとの衝突損失を減少する。図３に示すように、図３は一実施例に係る煙道ガス混合装置の正面図であり（図に環状冷却排気ガス支管を表示していない）、環状キャビティ３に空気支管３２が設けられ、空気支管３２の底部に電動バルブ３３が組み付けられることで、空気支管３２の吸気を制御する。煙道出口セグメント１２の頂上部に酸素含有量モニタ１４が設けられることで、混合した後に煙道ガスにおける酸素含有量をリアルタイムに監視し、酸素含有量モニタ１４のプローブは煙道出口セグメント１２の中心位置までに延びており、混合した煙道ガスの酸素含有量に対してより正確に測定できることを保証することができる。煙道ガス混合装置には、制御モジュール３４がさらに設けられ、酸素含有量モニタ１４は制御モジュール３４に電気的に接続され、酸素含有量モニタ１４は、検出された酸素含有量の結果を制御モジュール３４にフィードバックし、制御モジュール３４は、空気支管３２における電動バルブ３３の開度を調節することで、燒結酸素が十分に供給されることを保証する。好ましくは、煙道ガス循環過程における熱損失を減少するために、煙道ガス混合装置の本体の外部に保温処理を行い、且つ空気支管３２の電動バルブ３３の開度を適時調節する。煙道出口セグメント１２の直径は煙道入口セグメント１１の直径より大きく、煙道出口セグメント１２の底部に灰バケツ１３が設けられることで、混合煙道ガスがフレアセグメント２３に通した後に管直径が大きくになることにより流速が減速され、重力により沈降される一部の粉塵を収集することで、煙道の灰集積及び摩耗を有効に回避することができる。 The annular cavity 3 extends outward to form the annular cooling exhaust gas branch pipe 31, the suction holes 221 are both communicated with the annular cavity 3 and the annular cooling exhaust gas branch pipe 31, and the annular cooling exhaust gas branch pipe 31 is inclined. By designing the annular cooling exhaust gas in this way, the annular cooling exhaust gas is first sucked into the annular cavity 3 from the annular cooling exhaust gas branch pipe 31, and further uniformly and inclined to the circumferential side wall of the throat segment 22. By being sucked into the flue gas main passage through the suction holes 221 distributed in the throat segment 22, it is possible to suck evenly over the entire circumference of the throat segment 22, and it is also possible to buffer the inflowing flue gas and stabilize the pressure. In addition, a stable differential pressure is formed between the annular cavity 3 and the flue gas main passage to maintain uniform stability of the flue gas main passage flow field. Preferably, by utilizing the fact that the annular cavity 3 is filled with the annular cooling exhaust gas and sucking by fully utilizing all the suction holes 221 of the throat segment 22, the annular cooling exhaust gas passes through the suction holes 221. Then, acceleration occurs, and a guide action for the inflowing flue gas can be realized. Further, the suction hole 221 in the throat segment 22 is provided so as to be inclined so that the annular cooling exhaust gas can be merged with the inflow flue gas at a predetermined angle, and the annular cooling exhaust gas can be directly connected to the inflow flue gas. By avoiding the impact, the influence on the flow of the inflowing flue gas is reduced, and the collision loss between the drawn gas and the inflowing flue gas is reduced. As shown in FIG. 3, FIG. 3 is a front view of the flue gas mixing device according to the embodiment (the annular cooling exhaust gas branch pipe is not shown in the figure), and the annular cavity 3 is provided with the air branch pipe 32. By assembling the electric valve 33 to the bottom of the air branch pipe 32, the intake air of the air branch pipe 32 is controlled. An oxygen content monitor 14 is provided at the top of the flue outlet segment 12 to monitor the oxygen content in the flue gas in real time after mixing, and the probe of the oxygen content monitor 14 is the probe of the flue outlet segment 12. It extends to the central position and can ensure that the oxygen content of the mixed flue gas can be measured more accurately. The flue gas mixer is further provided with a control module 34, the oxygen content monitor 14 is electrically connected to the control module 34, and the oxygen content monitor 14 controls the result of the detected oxygen content. By feeding back to 34, the control module 34 adjusts the opening degree of the electric valve 33 in the air support pipe 32 to ensure that the flue gas is sufficiently supplied. Preferably, in order to reduce heat loss in the flue gas circulation process, heat insulation treatment is performed on the outside of the main body of the flue gas mixing device, and the opening degree of the electric valve 33 of the air branch pipe 32 is appropriately adjusted. The diameter of the flue outlet segment 12 is larger than the diameter of the flue inlet segment 11, and the ash bucket 13 is provided at the bottom of the flue outlet segment 12, so that the tube diameter becomes larger after the mixed flue gas is passed through the flare segment 23. As the flow rate increases, the flow velocity slows down, and by collecting some dust that is settled by gravity, ash accumulation and wear in the flue can be effectively avoided.

図２及び図３に示すように、吸入孔２２１の軸線とスロートセグメント２２の軸線との夾角は２０°～９０°であり、環状冷却排気ガス支管３１の軸線とスロートセグメント２２の軸線との夾角は１５°～７５°であり、空気支管３２の軸線とスロートセグメント２２の軸線との夾角は３０°～９０°である。引き込んだガスの吸気構造を傾斜して設けることにより、引き込んだガスが流入煙道ガスに対する直接な衝撃を回避することができるとともに、流入煙道ガスにガイド作用を与えることができ、煙道ガスメイン通路の流動場の均一及び安定が維持され、引き込んだガスと流入煙道ガスとの衝突損失が減少される。そのうち、環状冷却排気ガス支管３１は一定な角度で環状キャビティ３内に傾斜して連結し、環状冷却排気ガス支管３１と環状キャビティ３との連通をより便利にすることができる。 As shown in FIGS. 2 and 3, the angle between the axis of the suction hole 221 and the axis of the throat segment 22 is 20 ° to 90 °, and the angle between the axis of the annular cooling exhaust gas branch 31 and the axis of the throat segment 22. Is 15 ° to 75 °, and the angle between the axis of the air support pipe 32 and the axis of the throat segment 22 is 30 ° to 90 °. By providing the intake structure of the drawn gas at an angle, the drawn gas can avoid a direct impact on the inflowing flue gas, and can also give a guiding action to the inflowing flue gas, so that the flue gas can be guided. The uniformity and stability of the flow field in the main passage is maintained, and the collision loss between the drawn gas and the inflow flue gas is reduced. Among them, the annular cooling exhaust gas branch pipe 31 is inclined and connected in the annular cavity 3 at a constant angle, so that the communication between the annular cooling exhaust gas branch pipe 31 and the annular cavity 3 can be made more convenient.

図４は一実施例に係る燒結煙道ガス循環プロセスのプロセスフロー模式図であり、図２～図４に示すように、燒結煙道ガス循環プロセスの作業原理は以下の通りである。 FIG. 4 is a schematic diagram of the process flow of the flue gas circulation process according to one embodiment, and as shown in FIGS. 2 to 4, the working principle of the flue gas circulation process is as follows.

材料は燒結機３ｂで燒結され、燒結機３ｂから取り外された燒結熱鉱は、環状冷却器１により冷却された後に環状冷却排気ガスを生じ、燒結機３ｂの首尾部から取り込んだ、燒結循環送風機４１により増圧された循環煙道ガスと共に、煙道ガス混合装置に入り、且つ燒結機３ｂの頭部における煙道ガスシールカバー３ａを通過して燒結機３ｂに入る。燒結機３ｂが生じる煙道ガス（非循環煙道ガス）の大部分は、除塵器４を通過し、燒結メイン吸引機４２により加圧されて脱硫塔５及び煙突６に搬送され、最後に排出される。 The material was sintered by the sinter 3b, and the sinter hot ore removed from the sinter 3b produced an annular cooling exhaust gas after being cooled by the sinter cooler 1, and was taken in from the successful part of the sinter 3b. Together with the circulating flue gas boosted by 41, it enters the flue gas mixer, passes through the flue gas seal cover 3a at the head of the sinter 3b, and enters the sinter 3b. Most of the flue gas (non-circulating flue gas) generated by the flue gas 3b passes through the dust remover 4, is pressurized by the flue main suction machine 42, is transported to the desulfurization tower 5 and the chimney 6, and is finally discharged. Will be done.

本実施例において、循環煙道ガスは燒結循環送風機４１により加圧された後に、経典的なベンチュリ管構造を本体とする煙道ガス混合装置内に流れることにより、スロートセグメント２２で負圧が発生され、環状冷却排気ガスは、環状冷却器１の従来の送風機（図示せず）により押されて環状冷却排気ガス支管３１により環状キャビティ３内に入り、負圧の作用で吸入孔２２１によりスロートセグメント２２の流入煙道ガスに吸入され、且つ二つの流体の差圧を利用して引き込んだ環状冷却排気ガスと流入煙道ガスとを十分に混合させ、関連技術における燒結煙道ガス循環プロセスに比べて、本実施例は環状冷却循環送風機１１を必要とせず、環状冷却排気ガスと循環煙道ガスとの十分な混合を効果的に実現することができ、燒結煙道ガス循環プロセスにおける煙道の煙道ガスの成分及び煙道ガスの温度を均一にして、煙道ガスの流量を安定化することもできる。また、スロートセグメント２２に空気支管３２が傾斜して設けられ、空気支管３２は、混合した後に煙道出口セグメント１２における酸素含有量の変化により、随時調整・制御して空気を補足することもできる。 In this embodiment, the circulating flue gas is pressurized by the smoldering circulation blower 41 and then flows into the flue gas mixing device having a classic venturi tube structure as a main body, so that a negative pressure is generated in the throat segment 22. The annular cooling exhaust gas is pushed by the conventional blower (not shown) of the annular cooler 1 and enters the annular cavity 3 by the annular cooling exhaust gas branch pipe 31, and is throat segmented by the suction hole 221 due to the action of negative pressure. Compared to the smoldering flue gas circulation process in the related technology, the annular cooling exhaust gas sucked into the inflow flue gas of 22 and drawn in by using the differential pressure of the two fluids and the inflow flue gas are sufficiently mixed. Therefore, this embodiment does not require the annular cooling circulation blower 11, can effectively realize sufficient mixing of the annular cooling exhaust gas and the circulating flue gas, and can effectively realize the flue gas in the smoldering flue gas circulation process. It is also possible to stabilize the flow rate of the flue gas by making the components of the flue gas and the temperature of the flue gas uniform. Further, the throat segment 22 is provided with an inclined air support pipe 32, and the air support pipe 32 can be adjusted and controlled at any time to supplement air by changing the oxygen content in the flue outlet segment 12 after mixing. ..

図５は一実施例に係る煙道ガス混合方法フローチャートであり、図５に示すように、当該煙道ガス混合方法はステップ１１０～ステップ１３０を含む。 FIG. 5 is a flowchart of a flue gas mixing method according to an embodiment, and as shown in FIG. 5, the flue gas mixing method includes steps 110 to 130.

ステップ１１０において、煙道入口セグメントへ煙道ガスを導入する。 In step 110, flue gas is introduced into the flue inlet segment.

ステップ１２０において、環状冷却排気ガス支管へ環状冷却排気ガスを導入する。 In step 120, the annular cooling exhaust gas is introduced into the annular cooling exhaust gas branch pipe.

ステップ１３０において、環状冷却排気ガスは環状キャビティ及び吸入孔を順次通過した後に、煙道ガスと混合して混合ガスを形成する。 In step 130, the annular cooling exhaust gas sequentially passes through the annular cavity and the suction hole and then mixes with the flue gas to form a mixed gas.

好ましくは、当該煙道ガス混合方法は、混合ガスの酸素含有量を監視することと、
酸素含有量により、環状キャビティ内に吸入された空気の吸入量をリアルタイムに調整することとをさらに含む。 Preferably, the flue gas mixing method comprises monitoring the oxygen content of the mixed gas.
The oxygen content further includes adjusting the inhaled amount of air sucked into the annular cavity in real time.

本発明に係る煙道ガス混合装置は、関連技術における煙道ガス混合装置のエネルギー消費が高く、煙道ガス混合効果が不良であるという問題を解決することができる。 The flue gas mixing device according to the present invention can solve the problem that the energy consumption of the flue gas mixing device in the related technique is high and the flue gas mixing effect is poor.

１’ 環状冷却器
１１’ 環状冷却循環送風機
２’ 煙道ガス混合器
３１’ 煙道ガスシールカバー
３２’ 燒結機
４’ 除塵器
４１’ 燒結循環送風機
４２’ 燒結メイン吸引機
５’ 脱硫塔
６’ 煙突
１ 環状冷却器
３ａ 煙道ガスシールカバー
３ｂ 燒結機
４ 除塵器
４１ 燒結循環送風機
４２ 燒結メイン吸引機
５ 脱硫塔
６ 煙突
１１ 煙道入口セグメント
１２ 煙道出口セグメント
１３ 灰バケツ
１４ 酸素含有量モニタ
２１ ネッキングセグメント
２２ スロートセグメント
２３ フレアセグメント
２２１ 吸入孔
３ 環状キャビティ
３１ 環状冷却排気ガス支管
３２ 空気支管
３３ 電動バルブ
３４ 制御モジュール 1'annular cooler 11'annular cooling circulation blower 2'flue gas mixer 31'flue gas seal cover 32' flue gas seal cover 32' flue gas remover 4'dust remover 41' simmering circulation blower 42'smelting main suction machine 5'desulfurization tower 6' Chimney 1 Circular cooler 3a Flue gas seal cover 3b Flue gas remover 4 Dust remover 41 Chimney circulation blower 42 Chimney main suction machine 5 Desulfurization tower 6 Chimney 11 Flue gas inlet segment 12 Flue gas outlet segment 13 Ash bucket 14 Oxygen content monitor 21 Necking segment 22 Throat segment 23 Flare segment 221 Suction hole 3 Circular cavity 31 Circular cooling flue gas branch 32 Air branch 33 Electric valve 34 Control module

Claims (9)

煙道ガス混合装置であって、
前記煙道ガス混合装置は、
煙道入口セグメント（１１）と、
側壁に複数の吸入孔（２２１）が周設されたスロートセグメント（２２）と、
前記スロートセグメント（２２）の外周に設けられた環状キャビティ（３）と、
前記環状キャビティ（３）に連結された環状冷却排気ガス支管（３１）と、
煙道出口セグメント（１２）と、
前記煙道入口セグメント（１１）と前記スロートセグメント（２２）との間に連結されたネッキングセグメント（２１）と、
前記スロートセグメント（２２）と前記煙道出口セグメント（１２）との間に連結されたフレアセグメント（２３）と、
前記環状キャビティ（３）に設けられた空気支管（３２）と、制御モジュール（３４）とを含み、
前記空気支管（３２）の軸線と前記スロートセグメント（２２）の軸線との夾角は３０°～９０°であり、前記空気支管（３２）は電動バルブ（３３）を含み、前記電動バルブ（３３）は前記制御モジュール（３４）に電気的に接続されている、煙道ガス混合装置。 A flue gas mixer
The flue gas mixer is
Flue entrance segment (11) and
A throat segment (22) having a plurality of suction holes (221) on the side wall, and a throat segment (22).
An annular cavity (3) provided on the outer periphery of the throat segment (22) and
An annular cooling exhaust gas branch pipe (31) connected to the annular cavity (3),
Flue exit segment (12) and
A necking segment (21) connected between the flue inlet segment (11) and the throat segment (22),
A flare segment (23) connected between the throat segment (22) and the flue outlet segment (12),
The air branch pipe (32) provided in the annular cavity (3) and the control module (34) are included.
The angle between the axis of the air branch (32) and the axis of the throat segment (22) is 30 ° to 90 °, the air branch (32) includes an electric valve (33), and the electric valve (33). ) Is a flue gas mixing device electrically connected to the control module (34) . 前記吸入孔（２２１）の軸線と前記スロートセグメント（２２）の軸線との夾角は２０°～９０°である、ことを特徴とする請求項１に記載の煙道ガス混合装置。 The flue gas mixing device according to claim 1, wherein the angle between the axis of the suction hole (221) and the axis of the throat segment (22) is 20 ° to 90 °. 前記環状冷却排気ガス支管（３１）の軸線と前記スロートセグメント（２２）の軸線との夾角は１５°～７５°である、ことを特徴とする請求項１に記載の煙道ガス混合装置。 The flue gas mixing device according to claim 1, wherein the angle between the axis of the annular cooling exhaust gas branch pipe (31) and the axis of the throat segment (22) is 15 ° to 75 °. 前記環状キャビティ（３）の断面は台形構造であり、かつ前記台形構造の角部は円弧形遷移面を有する、ことを特徴とする請求項３に記載の煙道ガス混合装置。 The flue gas mixing apparatus according to claim 3, wherein the cross section of the annular cavity (3) has a trapezoidal structure, and the corner portions of the trapezoidal structure have an arcuate transition surface. 前記煙道出口セグメント（１２）に設けられた酸素含有量モニタ（１４）をさらに含み、前記酸素含有量モニタ（１４）は前記制御モジュール（３４）に電気的に接続されている、ことを特徴とする請求項１に記載の煙道ガス混合装置。 It further comprises an oxygen content monitor (14) provided in the flue outlet segment (12), wherein the oxygen content monitor (14) is electrically connected to the control module (34). The flue gas mixing device according to claim 1 . 前記煙道出口セグメント（１２）の底部に設けられた灰バケツ（１３）をさらに含む、ことを特徴とする請求項５に記載の煙道ガス混合装置。 The flue gas mixing device according to claim 5 , further comprising an ash bucket (13) provided at the bottom of the flue outlet segment (12). 前記煙道出口セグメント（１２）の直径は前記煙道入口セグメント（１１）の直径よりも大きい、ことを特徴とする請求項１～６のいずれか一項に記載の煙道ガス混合装置。 The flue gas mixing apparatus according to any one of claims 1 to 6 , wherein the diameter of the flue outlet segment (12) is larger than the diameter of the flue inlet segment (11). 請求項１～７のいずれか一項に記載の煙道ガス混合装置を利用する煙道ガス混合方法であって、
前記煙道入口セグメント（１１）へ煙道ガスを導入することと、
前記環状冷却排気ガス支管（３１）へ環状冷却排気ガスを導入することと、
前記環状冷却排気ガスが前記環状キャビティ（３）及び前記吸入孔（２１１）を順次通過した後、前記煙道ガスと混合して混合ガスを形成することとを含む、煙道ガス混合方法。 A flue gas mixing method using the flue gas mixing device according to any one of claims 1 to 7 .
Introducing flue gas into the flue inlet segment (11) and
Introducing the annular cooling exhaust gas into the annular cooling exhaust gas branch pipe (31) and
A flue gas mixing method comprising sequentially passing the annular cooling exhaust gas through the annular cavity (3) and the suction hole (211) and then mixing with the flue gas to form a mixed gas. 前記環状冷却排気ガスと前記煙道ガスとを混合した後に、
前記混合ガスの酸素含有量に対して監視を行うことと、
前記酸素含有量により、前記環状キャビティ（３）に設けられた空気支管（３２）から前記環状キャビティ（３）内に補足されるべき空気の吸入量をリアルタイムに調整することとをさらに含む、ことを特徴とする請求項８に記載の煙道ガス混合方法。 After mixing the annular cooling exhaust gas and the flue gas,
Monitoring the oxygen content of the mixed gas and
Further including adjusting the intake amount of air to be captured in the annular cavity (3) from the air support pipe (32) provided in the annular cavity (3) in real time by the oxygen content. The flue gas mixing method according to claim 8 .
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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109631032A (en) * 2018-12-14 2019-04-16 同济大学 A kind of cross-current flue gas air mixing device
CN110057197B (en) * 2019-04-12 2020-05-08 诸暨市库仑环保科技有限公司 Sintering flue gas waste heat circulation system
CN110237734A (en) * 2019-06-10 2019-09-17 中国石油大学(北京) Gas mixer and emission-control equipment
CN111960634A (en) * 2020-08-07 2020-11-20 浙江绿治环保技术有限公司 Jet pump steam-mud heating mixer for sludge continuous thermal hydrolysis pipeline
CN112461008B (en) * 2020-11-24 2022-07-19 苏州玛旭自动化科技有限公司 Recycling device for waste heat of tail gas of tubular furnace
CN113639276B (en) * 2021-07-30 2022-08-16 西安建筑科技大学 Anti-smoke-channeling three-way flue and control method thereof
CN113996155A (en) * 2021-12-02 2022-02-01 宁波太极环保设备有限公司 Smoke whitening device, chimney and smoke whitening method
CN114373963A (en) * 2021-12-15 2022-04-19 国家电投集团氢能科技发展有限公司 Humidifier and fuel cell humidifying gas system
CN115487696B (en) * 2022-08-26 2023-12-22 昆明有色冶金设计研究院股份公司 Air oxygenation mixing device for micro-combustion engine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2599437A1 (en) 1986-05-27 1987-12-04 Roy Philippe Duct inducing nozzle.
DE3607676C2 (en) 1985-04-01 1989-06-08 Waagner-Biro Ag, Wien, At
DE10019414A1 (en) 2000-04-19 2001-10-31 Xcellsis Gmbh Gas feed device for pipeline section e.g. for fuel cell gas generation system, has inlet line coupled to annular collection space integrated within pipeline section
JP2002098012A (en) 2000-06-01 2002-04-05 Caterpillar Inc Variable flow venturi assembly for use in exhaust gas recirculation system of internal combustion engine
CN203627010U (en) 2013-12-31 2014-06-04 广西玉柴机器股份有限公司 EGR (Exhaust Gas Recirculation) mixer
CN105435669A (en) 2015-11-23 2016-03-30 重庆普什机械有限责任公司 Venturi mixer with drainage function
CN205779317U (en) 2016-05-06 2016-12-07 哈尔滨工程大学 A kind of marine low speed diesel engine Venturi tube ERG of improvement
JP2017517624A (en) 2015-03-27 2017-06-29 中国科学院過程工程研究所 Pollutant emission reduction process and system by classifying and collecting waste heat of sintered flue gas

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11324812A (en) * 1998-05-20 1999-11-26 Hino Motors Ltd Venturi type mixer
US6827084B2 (en) * 2002-06-21 2004-12-07 Lloyd Thomas Grubb, Jr. Automatic gas blender
WO2008047887A1 (en) * 2006-10-17 2008-04-24 Canon Kabushiki Kaisha Exhaust fuel diluting mechanism and fuel cell system with the exhaust fuel diluting mechanism
PL2667276T3 (en) * 2012-05-24 2018-04-30 Air Products And Chemicals, Inc. Method of, and apparatus for, providing a gas mixture
CN202715368U (en) * 2012-07-20 2013-02-06 宝山钢铁股份有限公司 Flue gas mixer
US9038590B2 (en) * 2012-12-09 2015-05-26 Crossroads Machine, Inc. Adjustable venturi mixing valve assembly
CN104028133B (en) * 2014-05-22 2015-11-25 西安交通大学 A kind of rotatable venturi mixer
CN104034175B (en) * 2014-06-11 2015-12-30 中冶北方（大连）工程技术有限公司 A kind of energy-saving and emission-reducing sintering process
CN104258752B (en) * 2014-09-30 2016-09-28 中国瑞林工程技术有限公司 A kind of flue gas mixing arrangement and method
CN205073837U (en) * 2015-10-20 2016-03-09 秦皇岛首创思泰意达环保科技有限公司 Flue gas washing and heat dissipation matter device

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3607676C2 (en) 1985-04-01 1989-06-08 Waagner-Biro Ag, Wien, At
FR2599437A1 (en) 1986-05-27 1987-12-04 Roy Philippe Duct inducing nozzle.
DE10019414A1 (en) 2000-04-19 2001-10-31 Xcellsis Gmbh Gas feed device for pipeline section e.g. for fuel cell gas generation system, has inlet line coupled to annular collection space integrated within pipeline section
JP2002098012A (en) 2000-06-01 2002-04-05 Caterpillar Inc Variable flow venturi assembly for use in exhaust gas recirculation system of internal combustion engine
CN203627010U (en) 2013-12-31 2014-06-04 广西玉柴机器股份有限公司 EGR (Exhaust Gas Recirculation) mixer
JP2017517624A (en) 2015-03-27 2017-06-29 中国科学院過程工程研究所 Pollutant emission reduction process and system by classifying and collecting waste heat of sintered flue gas
CN105435669A (en) 2015-11-23 2016-03-30 重庆普什机械有限责任公司 Venturi mixer with drainage function
CN205779317U (en) 2016-05-06 2016-12-07 哈尔滨工程大学 A kind of marine low speed diesel engine Venturi tube ERG of improvement

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