JP3230563U - Pyrolysis-coupled direct power generation system using high-temperature flue gas from a boiler as a heat source - Google Patents
Pyrolysis-coupled direct power generation system using high-temperature flue gas from a boiler as a heat source Download PDFInfo
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 239000003546 flue gas Substances 0.000 title claims abstract description 26
- 238000010248 power generation Methods 0.000 title claims abstract description 14
- 239000003245 coal Substances 0.000 claims abstract description 86
- 239000007789 gas Substances 0.000 claims abstract description 35
- 239000000843 powder Substances 0.000 claims abstract description 35
- 238000005979 thermal decomposition reaction Methods 0.000 claims abstract description 16
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 239000000284 extract Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 239000000571 coke Substances 0.000 abstract description 9
- 239000006163 transport media Substances 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 3
- 238000003763 carbonization Methods 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
【課題】ボイラの高温煙道ガスのリサイクルを実現でき、ＮＯｘの生成濃度を低減するとともに、熱分解システムの配置を簡略化し、熱分解ガスを粉コークスの輸送媒体として利用することで、安全性を向上できる粉炭熱分解結合直接発電システムを提供する。【解決手段】システムは、粉炭熱分解装置３、オイルガス分離装置４、粉バンカ５、高温送風機８及び空気予熱器９などを含み、石炭ミル２の粉炭出口は粉炭熱分解装置の粉炭入口に連通し、粉炭の熱分解熱源は、ボイラ７の水平煙道から抽出された高温低酸素煙道ガスであり、高温送風機による抽出後、粉炭熱分解装置に入り粉炭に接触し、粉炭熱分解装置の出口はオイルガス分離装置の入口に連通し、オイルガス分離装置はタール出口、高温粉コークス出口及び熱分解ガス出口を備え、高温粉コークス出口は粉バンカの入口に連通し、粉バンカの出口は粉排出機６を介してボイラに連通し、空気予熱器は煙道ガスにより熱交換され、空気予熱器の熱一次風出口は石炭ミルの熱一次風入口に連通する。【選択図】図１PROBLEM TO BE SOLVED: To realize recycling of high-temperature flue gas of a boiler, reduce the production concentration of NOx, simplify the arrangement of a pyrolysis system, and use the pyrolysis gas as a transport medium for powdered coke for safety. Provide a pulverized coal pyrolysis combined direct power generation system that can improve. The system includes a pulverized coal pyrolyzer 3, an oil / gas separator 4, a pulverized bunker 5, a high temperature blower 8, an air preheater 9, and the like, and the pulverized coal outlet of the coal mill 2 is at the pulverized coal inlet of the pulverized coal pyrolyzer. The thermal decomposition heat source of the pulverized coal is the high-temperature low-oxygen flue gas extracted from the horizontal flue of the boiler 7, and after being extracted by the high-temperature blower, it enters the pulverized coal pyrolyzer and comes into contact with the pulverized coal. The outlet is connected to the inlet of the oil / gas separator, the oil / gas separator is equipped with a tar outlet, a high temperature powder coke outlet and a pyrolysis gas outlet, and the high temperature powder coke outlet is connected to the powder bunker inlet, and the powder bunker outlet. Communicates with the boiler via the powder discharger 6, the air preheater communicates with the flue gas, and the thermal primary air outlet of the air preheater communicates with the thermal primary air inlet of the coal mill. [Selection diagram] Fig. 1
Description
本考案は、石炭分級分質利用分野に関し、特に粉炭石炭熱分解と石炭火力発電ユニットの結合発電に適用するボイラの高温煙道ガスを熱源として用いる粉炭熱分解結合直接発電システムに関する。 The present invention relates to the field of coal classification and classification utilization, and particularly to a pulverized coal pyrolysis combined direct power generation system using a boiler high temperature flue gas as a heat source, which is applied to combined power generation of pulverized coal coal pyrolysis and a coal-fired power generation unit.
中低温乾留プロセスを採用し、石炭を遮断空気条件で加熱分解してタール、半コークス及びガスを生成し、タールを仕上げ加工して付加価値の高い化学工業製品を得ることができる。このようなプロセスは、石炭分級分質利用を実現する有効な手段であり、現在、既に国内で独特な循環経済産業チェーンを形成している。。 By adopting a medium-low temperature dry distillation process, coal can be heat-decomposed under closed air conditions to produce tar, semi-coke and gas, and the tar can be finished to obtain high-value-added chemical products. Such a process is an effective means to realize the utilization of coal classification and classification, and has already formed a unique circular economy and industry chain in the country. ..
従来から、石炭中低温乾留プロセスは、塊炭（３０〜８０ｍｍ）のみを原料石炭として用いることができ、塊炭の生産率は、原炭の採掘量の２５％程度を占め、大量の粉炭は、効率的に加工することができない。国内関連企業の絶え間ない努力により、現在、粉炭乾留プロセスは、既に応用条件を具備する。しかし、高付加価値のタール製品を生成する以外に、ガス及び割合が７０％程度の半コークスは、効率的に利用することができず、ある程度のエネルギー浪費を引き起こし、産業の発展を妨げている。ガスは、大部分が直接排出又はガスタービンにより発電し、有効利用率が低い。大量の半コークスは、まず常温まで冷却され、そして輸送により火力発電ユニットに輸送されて燃焼し、エネルギーを消費して高温の半コークスを降温させるだけでなく、高温の粉コークスの高温顕熱を無駄に消費してしまう。 Conventionally, in the low-temperature carbonization process in coal, only lump coal (30 to 80 mm) can be used as raw coal, the production rate of lump coal accounts for about 25% of the mined amount of raw coal, and a large amount of pulverized coal is used. , Cannot be processed efficiently. Due to the constant efforts of domestic affiliates, the pulverized coal carbonization process now meets the application conditions. However, other than producing high-value-added tar products, gas and semi-coke with a ratio of about 70% cannot be used efficiently, causing some energy waste and hindering the development of industry. .. Most of the gas is directly discharged or generated by a gas turbine, and the effective utilization rate is low. A large amount of semi-coke is first cooled to room temperature and then transported to a thermal power generation unit for combustion, consuming energy to lower the temperature of the hot semi-coke, as well as sensible heat of the hot powder coke. It will be wasted.
本考案は、上述した従来技術の欠陥を鑑みて、ボイラの高温煙道ガスを熱源として用いる粉炭熱分解結合直接発電システムを提供することを目的とする。 In view of the above-mentioned defects of the prior art, the present invention aims to provide a pulverized coal pyrolysis coupled direct power generation system using the high temperature flue gas of a boiler as a heat source.
本考案は、以下の技術案により実現される。
ボイラの高温煙道ガスを熱源として用いる粉炭熱分解結合直接発電システムであって、石炭バンカ、石炭ミル、粉炭熱分解装置、オイルガス分離装置、粉バンカ、粉排出機、ボイラ及び空気予熱器を含み、
石炭バンカの出口は、石炭ミルの原炭入口に連通し、石炭ミルの粉炭出口は、粉炭熱分解装置の粉炭入口に連通し、粉炭の熱分解熱源は、ボイラの水平煙道から抽出された高温低酸素煙道ガスからのものであって、粉炭熱分解装置に入って粉炭に接触し、粉炭熱分解装置の出口は、オイルガス分離装置の入口に連通し、オイルガス分離装置は、タール出口、高温粉コークス出口及び熱分解ガス出口が設けられ、オイルガス分離装置の高温粉コークス出口は、粉バンカの入口に連通し、粉バンカの出口は、粉排出機を介してボイラに連通し、空気予熱器は、ボイラの煙道ガスにより熱交換され、空気予熱器の熱一次風出口は、石炭ミルの熱一次風入口に連通する。
The present invention is realized by the following technical proposal.
A pulverized coal pyrolysis combined direct power generation system that uses the high temperature flue gas of a boiler as a heat source, and includes coal bunker, coal mill, pulverized coal pyrolysis device, oil gas separator, pulverized bunker, powder discharger, boiler and air preheater. Including
The outlet of the coal bunker communicated with the raw coal inlet of the coal mill, the pulverized coal outlet of the coal mill communicated with the pulverized coal inlet of the pulverized coal pyrolysis device, and the thermal decomposition heat source of the pulverized coal was extracted from the horizontal flue of the boiler. It is from high temperature and low oxygen flue gas, enters the pulverized coal pyrolyzer and comes into contact with pulverized coal, the outlet of the pulverized coal pyrolyzer communicates with the inlet of the oil gas separator, and the oil gas separator is tar. An outlet, a high-temperature powder coke outlet and a pyrolysis gas outlet are provided. The high-temperature powder coal outlet of the oil gas separator communicates with the inlet of the powder bunker, and the outlet of the powder bunker communicates with the boiler via a powder discharger. The air preheater is thermally exchanged by the flue gas of the boiler, and the thermal primary air outlet of the air preheater communicates with the thermal primary air inlet of the coal mill.
本考案の更なる改良として、高温送風機をさらに含み、高温送風機は、ボイラの水平煙道から高温低酸素煙道ガスを抽出して粉炭熱分解装置の入口に送る。 As a further improvement of the present invention, a high temperature blower is further included, which extracts high temperature and low oxygen flue gas from the horizontal flue of the boiler and sends it to the inlet of the pulverized coal pyrolyzer.
本考案は、少なくとも以下の有益な技術的効果を有する。
本考案は、ボイラの９００℃程度の高温低酸素煙道ガスを粉炭熱分解装置の熱分解熱源として利用し、熱分解後の混合ガスがオイルガス分離器により分離された熱分解ガスは、粉コータスの輸送媒体として、粉コータスとともに燃焼器によりボイラに送り込まれて燃焼し、高温の粉コータスの輸送の安全性を確保する。本考案は、ボイラの一部の高温煙道ガスのリサイクルを実現することができ、一定のＮＯｘの生成濃度を低減させる効果を有するとともに、高温煙道ガスを抽出することは、熱分解システムの配置を効果的に簡略化し、熱分解ガスを粉コータスの輸送媒体として利用することにより、高温の粉コータスの輸送の安全性を向上させることができる。
The present invention has at least the following beneficial technical effects.
In the present invention, the high temperature and low oxygen flue gas of about 900 ° C. of the boiler is used as the thermal decomposition heat source of the pulverized coal pyrolysis apparatus, and the pyrolysis gas obtained by separating the mixed gas after the thermal decomposition by the oil gas separator is powder. As a transport medium for cortus, it is sent to a boiler together with powder cortus by a combustor and burned to ensure the safety of transporting high-temperature powder cortus. The present invention can realize the recycling of a part of the high temperature flue gas of the boiler, has the effect of reducing the production concentration of a certain NOx, and extracts the high temperature flue gas is a pyrolysis system. By effectively simplifying the arrangement and using the pyrolysis gas as a transport medium for the powdered coatus, the safety of transporting the high temperature powdered coatus can be improved.
以下、図面を参照しつつ本考案をさらに説明する。
本考案の原理図は、図１に示され、技術要点は以下の通りである。
石炭側
石炭工場からの原炭は、石炭バンカ１を経て石炭ミル２に送り込まれて製粉され、製粉後の粒径が要求された粒径を満たす粉炭は、粉炭熱分解装置３に入り、粉炭熱分解装置３内で乾留熱分解され、析出した生成物は、オイルガス分離機４によりタール、高温の粉コータス、熱分解ガスが分離され、タールは、収集されて後続の仕上げ加工が行われ、高温の粉コータスは、収集されて粉バンカ５に入り、そして粉排出機６を介して直接ボイラに送り込まれて燃焼する。
Hereinafter, the present invention will be further described with reference to the drawings.
The principle diagram of the present invention is shown in FIG. 1, and the technical points are as follows.
Coal side The raw coal from the coal factory is sent to the coal mill 2 via the coal bunker 1 to be pulverized, and the pulverized coal having the required particle size after pulverization enters the pulverized coal pyrolyzer 3 and is pulverized. The product obtained by dry distillation thermal decomposition in the thermal decomposition apparatus 3 is separated into tar, high-temperature powder coatus, and thermal decomposition gas by the oil gas separator 4, and the tar is collected and subjected to subsequent finishing. The hot powder coal is collected, enters the powder bunker 5, and is sent directly to the boiler via the powder ejector 6 for burning.
ガス側
ボイラの空気予熱器９により加熱された熱一次風は、原炭製粉の乾燥及び輸送の媒体として石炭ミル２に入り、製粉後、粉炭を運んで粉炭熱分解装置３に入り、粉炭の熱分解熱源は、ボイラ７の水平煙道から抽出された高温低酸素煙道ガスからのものであり、高温送風機８により抽出された後、粉炭熱分解装置３に入って粉炭に接触し、熱分解過程が行われる。熱分解後の混合ガスは、オイルガス分離器４により熱分解ガスが分離され、熱分解ガスは、輸送媒体として粉排出機６に入り高温の粉コータスと混合された後、ボイラに送り込まれて燃焼する。
The thermal primary wind heated by the air preheater 9 of the gas side boiler enters the coal mill 2 as a medium for drying and transporting the raw coal pulverization, and after pulverization, carries the pulverized coal and enters the pulverized coal pyrolyzer 3 to enter the pulverized coal. The pyrolysis heat source is from the high-temperature low-oxygen flue gas extracted from the horizontal flue of the boiler 7, and after being extracted by the high-temperature blower 8, enters the pulverized coal thermal decomposition apparatus 3 and comes into contact with the pulverized coal to generate heat. The decomposition process takes place. The pyrolysis gas is separated by the oil gas separator 4, and the pyrolysis gas enters the powder discharger 6 as a transportation medium, is mixed with the high-temperature powder coatus, and then is sent to the boiler. Burn.
本考案は、ボイラの高温煙道ガスを熱源として用いる粉炭熱分解結合直接発電システムにより、以下のメリットを有する。
（１）ボイラの高温低酸素煙道ガスを熱分解システム熱源として抽出し、熱分解装置の配置を効果的に簡略化する。
（２）ボイラから抽出された高温煙道ガスと熱分解後のガスをボイラに送り戻す内部循環を実現し、ボイラシステムの熱伝導に影響することなくＮＯｘ生成濃度を低減させる一定の効果を有する。
（３）熱分解ガスは、直接高温の粉コータスの輸送媒体としてボイラに送り込まれて燃焼し、高温の粉コータスの顕熱を無駄に消費することを回避する。
（４）本考案は、火力発電ユニットと粉炭熱分解装置をうまく結合することができ、粉炭熱分解後の粉コータスの効率的な利用に新たなアプローチを提供し、顕著な社会的効果と環境効果を有する。
The present invention has the following merits by the pulverized coal pyrolysis combined direct power generation system using the high temperature flue gas of the boiler as a heat source.
(1) The high temperature and low oxygen flue gas of the boiler is extracted as a heat source of the pyrolysis system, and the arrangement of the pyrolysis device is effectively simplified.
(2) Realizes internal circulation that sends the high-temperature flue gas extracted from the boiler and the gas after thermal decomposition back to the boiler, and has a certain effect of reducing the NOx generation concentration without affecting the heat conduction of the boiler system. ..
(3) The pyrolysis gas is directly sent to the boiler as a transport medium for the high-temperature powder coatus and burned to avoid wasting the sensible heat of the high-temperature powder coatus.
(4) The present invention can successfully combine the thermal power generation unit and the pulverized coal pyrolysis device, and provides a new approach to the efficient use of pulverized cortus after pulverized coal pyrolysis, and has a remarkable social effect and environment. Has an effect.
上述したように、本考案は、高温送風機により抽出されたボイラの高温低酸素煙道ガスを熱分解システムの熱分解熱源として利用し、オイルガス分離装置を利用してタール、粉コータス、熱分解ガスの有効な分離を実現し、熱分解ガスは、粉コータスの輸送媒体として、粉排出風機により排出された粉コータスと混合された後、ボイラ燃焼器を介してボイラ内に噴射された燃焼する。 As described above, the present invention utilizes the high-temperature low-oxygen flue gas of the boiler extracted by the high-temperature blower as the thermal decomposition heat source of the thermal decomposition system, and uses the oil gas separator to decompose tar, powdered coatus, and thermal decomposition. Achieves effective separation of the gas, and the pyrolysis gas is mixed with the powder coatus discharged by the powder discharge blower as a transport medium for the powder coatus, and then burned by being injected into the boiler via the boiler combustor. ..
１ 石炭バンカ
２ 石炭ミル
３ 粉炭熱分解装置
４ オイルガス分離装置
５ 粉バンカ
６ 粉排出機
７ ボイラ
８ 高温送風機
９ 空気予熱器
1 Coal bunker 2 Coal mill 3 Powder coal pyrolysis device 4 Oil gas separator 5 Powder bunker 6 Powder discharger 7 Boiler 8 High temperature blower 9 Air preheater
Claims (2)
石炭バンカ（１）、石炭ミル（２）、粉炭熱分解装置（３）、オイルガス分離装置（４）、粉バンカ（５）、粉排出機（６）、ボイラ（７）及び空気予熱器（９）を含み、
石炭バンカ（１）の出口は、石炭ミル（２）の原炭入口に連通し、石炭ミル（２）の粉炭出口は、粉炭熱分解装置（３）の粉炭入口に連通し、粉炭の熱分解熱源は、ボイラ（７）水平煙道から抽出された高温低酸素煙道ガスからのものであって、粉炭熱分解装置（３）に入って粉炭に接触し、粉炭熱分解装置（３）の出口は、オイルガス分離装置（４）の入口に連通し、オイルガス分離装置（４）は、タール出口、高温粉コークス出口及び熱分解ガス出口が設けられ、オイルガス分離装置（４）の高温粉コークス出口は、粉バンカ（５）の入口に連通し、粉バンカ（５）の出口は、粉排出機（６）を介してボイラ（７）に連通し、空気予熱器（９）は、ボイラ（７）の煙道ガスにより熱交換され、空気予熱器（９）の熱一次風出口は、石炭ミル（２）の熱一次風入口に連通することを特徴とするボイラの高温煙道ガスを熱源として用いる粉炭熱分解結合直接発電システム。 It is a pulverized coal pyrolysis combined direct power generation system that uses the high temperature flue gas of the boiler as a heat source.
Coal bunker (1), coal mill (2), pulverized coal pyrolyzer (3), oil gas separator (4), pulverized bunker (5), powder discharger (6), boiler (7) and air preheater ( 9) including
The outlet of the coal bunker (1) communicates with the raw coal inlet of the coal mill (2), and the pulverized coal outlet of the coal mill (2) communicates with the pulverized coal inlet of the pulverized coal thermal cracker (3) to thermally decompose the pulverized coal. The heat source is from the high-temperature low-oxygen flue gas extracted from the boiler (7) horizontal flue gas, enters the pulverized coal thermal decomposition device (3) and comes into contact with the pulverized coal, and the pulverized coal thermal decomposition device (3). The outlet communicates with the inlet of the oil / gas separator (4), and the oil / gas separator (4) is provided with a tar outlet, a high-temperature powder coal outlet, and a thermal decomposition gas outlet, and the high temperature of the oil / gas separator (4) is provided. The powder coal outlet communicates with the inlet of the powder bunker (5), the outlet of the powder bunker (5) communicates with the boiler (7) via the powder discharger (6), and the air preheater (9) communicates with the boiler (7). The high temperature flue gas of the boiler is characterized in that heat is exchanged by the flue gas of the boiler (7) and the primary heat outlet of the air preheater (9) communicates with the primary heat inlet of the coal mill (2). A direct power generation system that uses pulverized coal thermal decomposition coupling as a heat source.
高温送風機（８）は、ボイラ（７）の水平煙道から高温低酸素煙道ガスを抽出して粉炭熱分解装置（３）の入口に送ることを特徴とする請求項１に記載のボイラの高温煙道ガスを熱源として用いる粉炭熱分解結合直接発電システム。 Including a high temperature blower (8)
The boiler according to claim 1, wherein the high-temperature blower (8) extracts high-temperature low-oxygen flue gas from the horizontal flue of the boiler (7) and sends it to the inlet of the pulverized coal pyrolyzer (3). A pulverized coal pyrolysis combined direct power generation system that uses high-temperature flue gas as a heat source.
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