JP2020075799A - Coal transport facility - Google Patents

Coal transport facility Download PDF

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JP2020075799A
JP2020075799A JP2018210586A JP2018210586A JP2020075799A JP 2020075799 A JP2020075799 A JP 2020075799A JP 2018210586 A JP2018210586 A JP 2018210586A JP 2018210586 A JP2018210586 A JP 2018210586A JP 2020075799 A JP2020075799 A JP 2020075799A
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coal
transport device
yard
storage yard
storage
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JP7127497B2 (en
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直也 宮脇
Naoya Miyawaki
直也 宮脇
憲昭 池田
Kensho Ikeda
憲昭 池田
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Nippon Steel Corp
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Abstract

To provide a coal transport facility capable of continuously operating a coal-fired power plant even when coal cannot be carried out from a coal storage yard by a carrying-out device.SOLUTION: A coal transport facility 2 comprises: a first transport device 7 for transporting coal of a coal receiving yard 3; a second transport device 10 which transports the coal transported by the first transport device 7 or the coal carried out from an outdoor coal storage yard 4 to supply to an intermediate coal storage vessel 5; a loading/carrying-out device 9 which loads the coal transported by the first transport device 7 on the outdoor coal storage yard 4 and further carries out the coal loaded on the outdoor coal storage yard 4 to the second transport device 10; and a third transport device 13 which transports the coal supplied to the intermediate coal storage vessel 5 to supply to a coal burning boiler 6. The facility further comprises one or more coal throwing-in devices 16 which throw in the coal transported by one or more mobile transporting body 15 transporting the coal stored in the outdoor coal storage yard 4 while moving, into at least one of the first transport device 7 and the second transport device 10.SELECTED DRAWING: Figure 1

Description

本発明は、石炭搬送設備に関し、具体的には、石炭火力発電所の貯炭場に積み付けられた石炭を例えばスタッカ・リクレーマで払出して石炭燃焼ボイラーへ供給する石炭搬送設備に関する。   TECHNICAL FIELD The present invention relates to a coal transportation facility, and more specifically, to a coal transportation facility that discharges coal loaded in a coal storage yard of a coal-fired power plant by, for example, a stacker / reclaimer and supplies the coal to a coal combustion boiler.

石炭火力発電所は、石炭燃焼ボイラーにより石炭を燃焼することによって得られるエネルギーを発電機へ供給することにより、発電する。日本国内における石炭火力発電所は、石炭船により海上輸送されてきた石炭を、陸揚げして粉砕乾燥等を行った後に石炭燃焼ボイラーへ供給する。このため、一般的に、何段階かの石炭の搬送作業および貯蔵作業が、船舶に積載されてから石炭燃焼ボイラーに供給されて燃焼するまでの間に行われる。   A coal-fired power plant generates power by supplying energy obtained by burning coal with a coal-fired boiler to a generator. Coal-fired power plants in Japan supply the coal, which has been transported by sea by a coal ship, to a coal-fired boiler after landing, crushing and drying the coal. For this reason, in general, several stages of coal transfer work and storage work are performed between the time when the coal is loaded on a ship and the time when it is supplied to a coal combustion boiler and burned.

電力需要に応じて安定して操業することが石炭火力発電所に求められる。このため、石炭を必要時に安定して供給することが重要である。一方で、上述した何段階かの搬送作業および貯蔵作業を行う必要があるため、通常、石炭火力発電所は何らかの石炭貯蔵機能を有する。これにより、日常的な変動に対応しながら石炭貯蔵量の過不足が生じないように、石炭の受入、石炭保有量の把握、送炭作業等が計画的に管理される。   Coal-fired power plants are required to operate stably according to the demand for electric power. For this reason, it is important to supply coal stably when needed. On the other hand, the coal-fired power plant usually has some kind of coal storage function because it is necessary to perform the above-described several stages of transfer work and storage work. This systematically manages the receipt of coal, the grasp of the amount of coal held, the coal transfer work, etc. so as to prevent excess or deficiency of the coal storage amount while responding to daily fluctuations.

しかし、上述した石炭の搬送作業や貯蔵作業の多くは屋外で行われる。このため、異常気象等の悪天候により石炭の受入や搬送ができなくなることがある。短時間の作業停止時間で日常的な変動の範囲であれば大きな問題はないものの、悪天候が長時間継続すると、石炭火力発電所の操業に大きく影響し、最悪の場合には操業停止に至ることもある。   However, most of the above-mentioned coal transportation work and storage work are performed outdoors. For this reason, it may not be possible to receive or carry coal due to bad weather such as abnormal weather. Although there are no major problems within a range of daily fluctuations with a short work stop time, if bad weather continues for a long time, it will greatly affect the operation of the coal-fired power plant, and in the worst case, it will be shut down. There is also.

このため、異常気象等の悪天候が長時間継続しても、石炭燃焼ボイラーへの石炭供給を可能にする必要がある。   Therefore, it is necessary to enable the coal supply to the coal combustion boiler even if bad weather such as abnormal weather continues for a long time.

例えば、悪天候等により石炭船の入港が困難な状況が続くと、計画していた石炭船から貯炭場への石炭の受入ができなくなり、貯炭場の石炭保有量が計画値より減少して下限を下回り、発電所の継続運転に支障をきたす。これを防ぐため、特許文献1には、石炭保有量の推移を予測して、石炭保有量が所定量よりも下回ると予測された場合に警告を発すること、または、運転計画を修正することにより、単位時間当たりの石炭消費量を抑制することにより、石炭火力発電所の燃料不足を自動的に回避する発明が開示されている。   For example, if it is difficult to enter a coal ship due to bad weather, etc., the planned coal ship will no longer be able to receive coal from the coal ship, and the coal stock at the coal stockyard will fall below the planned value and the lower limit will be reached. It will fall below the level and interfere with the continuous operation of the power plant. In order to prevent this, in Patent Document 1, by predicting the transition of the coal holding amount and issuing a warning when the coal holding amount is predicted to be lower than a predetermined amount, or by modifying the operation plan. An invention is disclosed that automatically avoids a fuel shortage in a coal-fired power plant by suppressing the amount of coal consumed per unit time.

特開2007−264681号公報JP, 2007-264681, A

特許文献1に開示された発明によれば、悪天候等により石炭保有量を計画的に増加させることができない場合であっても、その時点で保有している石炭を有効に使用することができる。このため、特許文献1の実施例に示されたプラント構成において貯炭場に十分な量の石炭を保有していれば、特許文献1に開示されたシステムを利用することによって、ある程度の期間、発電所の継続運転が可能になると考えられる。   According to the invention disclosed in Patent Document 1, even if the coal holding amount cannot be intentionally increased due to bad weather or the like, the coal held at that time can be effectively used. Therefore, if the coal storage plant has a sufficient amount of coal in the plant configuration shown in the embodiment of Patent Document 1, the system disclosed in Patent Document 1 is used to generate power for a certain period of time. It is thought that continuous operation of the place will be possible.

ところで、広大な貯炭場を有する石炭火力発電所においては、一般に、貯炭場から石炭を払い出すために、払出し装置(リクレーマまたはスタッカ・リクレーマ等)が用いられる。払出し装置は、例えば、旋回可能なブームと、貯炭場から石炭をかき取るためにブームの先端に設けられるバケットホイールと、バケットホイールによってかき取った石炭を地上のベルトコンベアに搬送するための1以上のベルトコンベアとを備えている。   By the way, in a coal-fired power plant having a vast coal storage yard, a delivery device (a reclaimer or a stacker / reclaimer or the like) is generally used to deliver coal from the coal yard. The dispensing device is, for example, a swingable boom, a bucket wheel provided at the tip of the boom for scraping coal from a coal storage yard, and one or more for transporting the coal scraped by the bucket wheel to a belt conveyor on the ground. Equipped with a belt conveyor.

石炭火力発電所に設置される払出し装置は、一般に、強風時においても、ベルトコンベアを稼動できるように構成されている。しかしながら、強風時には、ブームの傾動および旋回動作を行うことは難しい。このため、強風時には、払出し装置によって貯炭場から石炭を払い出すことができなくなる。したがって、強風時には、特許文献1に開示されたシステムを利用したとしても、石炭燃焼ボイラーへ石炭を供給することができなくなる。   The payout device installed in a coal-fired power plant is generally configured so that the belt conveyor can be operated even in strong wind. However, when the wind is strong, it is difficult to tilt and rotate the boom. Therefore, when the wind is strong, coal cannot be discharged from the coal yard by the discharging device. Therefore, when the wind is strong, it becomes impossible to supply coal to the coal combustion boiler even if the system disclosed in Patent Document 1 is used.

近年では、気候の過酷化や設備保安基準の厳格化等のために、強風による払出し装置の一部機能の停止(ブームの稼動停止等)が2日間程度に及ぶこともあり、石炭火力発電所を継続して運転することに支障をきたす頻度が高くなる可能性が大きい。   In recent years, due to severe weather and stricter equipment safety standards, some functions of the dispensing device may be stopped due to strong winds (boom operation stop, etc.) for about two days. There is a high possibility that there will be a high frequency of hindrance to continuous operation.

強風下で払出し装置が通常通りの払出し能力を発揮できなくても石炭を継続的に石炭燃焼ボイラーに供給することができれば、石炭火力発電所を継続して運転することに支障をきたすことがなくなるか、あるいはより軽微な支障で済む。   If coal can be continuously supplied to the coal-fired boiler even if the discharge device does not exhibit the normal discharge capability under strong wind, it will not hinder the continuous operation of the coal-fired power plant. Or, it may be a minor problem.

本発明は、従来の技術が有する課題に鑑みてなされたものであり、払出し装置によって貯炭場から石炭を払い出すことができない場合でも、石炭火力発電所を継続して運転できる石炭搬送設備を提供することである。   The present invention has been made in view of the problems of the conventional technology, and provides a coal transportation facility that can continuously operate a coal-fired power plant even when coal cannot be discharged from a coal storage yard by a discharging device. It is to be.

本発明者らは、上述の課題を解決するために鋭意検討を重ねた結果、以下に列記の知見A〜Fを得て、本発明を完成した。   As a result of earnest studies to solve the above-mentioned problems, the present inventors have obtained findings A to F listed below, and completed the present invention.

(A)特許文献1における「悪天候等による影響」とは、石炭船の入港ができず石炭の受入ができないために貯炭場の石炭保有量が計画値より減少することであると解される。特許文献1では、悪天候下においても石炭火力発電所の操業は停止していないことから、貯炭場から微粉炭機やボイラー方向へ石炭を搬送する輸送コンベア等の石炭搬送設備は機能していると解されるからである。   (A) "Influence of bad weather" in Patent Document 1 is understood to mean that the amount of coal held in a coal storage yard decreases from a planned value because a coal ship cannot enter a port and cannot accept coal. In Patent Document 1, since the operation of the coal-fired power plant is not stopped even under bad weather, it is said that coal transport facilities such as a transport conveyor that transports coal from the coal yard to the pulverized coal machine and the boiler are functioning. Because it is understood.

(B)特に、特許文献1の段落0005に「貯炭場のスペース的な制約がある発電所においては、短期間の石炭船の入港困難な状況により、継続運転に支障をきたす恐れがある。」と記載されているように、貯炭場の石炭保有量が小さいことが悪天候等による影響が大きくなる原因であるとしている。   (B) In particular, in paragraph 0005 of Patent Document 1, "in a power plant where space is limited in a coal storage yard, there is a risk that continuous operation may be hindered by a situation in which a coal ship is difficult to enter a port for a short period of time." As described in the above, it is said that the fact that the amount of coal held in the coal storage yard is small is the cause of the large impact of bad weather.

(C)石炭搬送設備の一つであるベルトコンベアの総延長が数kmに及ぶような、広大な屋外貯炭場を有する石炭火力発電所(例えば、川崎重工技報 136号 1998年1月 8〜13頁参照)の石炭保有量は大きい。このため、この石炭火力発電所には特許文献1における「悪天候による影響」は小さいと考えられる。   (C) A coal-fired power plant having a vast outdoor coal yard where the total length of a belt conveyor, which is one of the coal transport facilities, is several kilometers (for example, Kawasaki Heavy Industry Technical Report No. 136, January 1998, 8- The amount of coal held (see page 13) is large. Therefore, this coal-fired power plant is considered to have a small “influence of bad weather” in Patent Document 1.

(D)広大な屋外貯炭場を有する石炭火力発電所における「悪天候等による影響」とは、例えば強風等の悪天候により、石炭受入場で石炭船から石炭を揚炭するためのアンローダや、貯炭場から石炭を払出すスタッカ・リクレーマの運転を停止せざるを得なくなり、貯炭場から微粉炭機や石炭燃焼ボイラーへ石炭を搬送できなくなることである。   (D) "Impact due to bad weather" in a coal-fired power plant having a vast outdoor coal storage yard means, for example, an unloader for discharging coal from a coal ship at a coal receiving site or a coal storage site due to bad weather such as strong wind. There is no choice but to stop the operation of the stacker / reclaimer that discharges coal from the coal yard, and it becomes impossible to transfer coal from the coal yard to the pulverized coal machine or the coal combustion boiler.

すなわち、広い屋外貯炭場を有する石炭火力発電所においても悪天候等により石炭燃焼ボイラーへの石炭供給量を維持することができない理由は、石炭を保有する貯炭場への石炭の搬送設備、あるいは、貯炭場からの石炭の搬送設備の運転に支障が生じることである。   That is, even in a coal-fired power plant having a large outdoor coal storage plant, the reason why the coal supply amount to the coal combustion boiler cannot be maintained due to bad weather or the like is that the coal transportation facility to the coal storage plant that holds the coal or the coal storage plant. This is an obstacle to the operation of coal transportation equipment from the site.

(E)運転に支障が生じる石炭の搬送設備を、悪天候の影響を受けない石炭の搬送設備により代替することによって、異常気象等の長期の悪天候期間においても、石炭火力発電所を継続して運転できる。   (E) By replacing the coal transportation facility that causes trouble in operation with a coal transportation facility that is not affected by bad weather, the coal-fired power plant is continuously operated even during a long bad weather period such as abnormal weather. it can.

(F)換言すれば、悪天候等により影響を受ける石炭の搬送設備は、石炭の搬送設備の中でも特定の搬送設備(上記のアンローダやスタッカ・リクレーマ)に限定され、かつ、貯炭場と搬送設備の配置状況によっては、悪天候等により影響を受ける石炭の搬送設備を、悪天候の影響を受けない石炭の搬送設備によって代替できる。   (F) In other words, the coal transportation equipment that is affected by bad weather is limited to the specific transportation equipment (unloader, stacker / reclaimer, etc.) among the coal transportation equipment, and the coal storage equipment and the transportation equipment are Depending on the arrangement, the coal transportation facility that is affected by bad weather can be replaced by the coal transportation facility that is not affected by bad weather.

本発明は以下に列記の通りである。   The present invention is as listed below.

(1)石炭を外部から受け入れる石炭受入場と、石炭を貯める貯炭場と、石炭を燃焼して発電用熱源を生成する石炭燃焼ボイラーと、石炭を前記石炭燃焼ボイラーへ供給する中間貯炭容器とを備える石炭火力発電所の石炭搬送設備であって、
前記石炭受入場の石炭を搬送する第1搬送装置と、
該第1搬送装置により搬送された石炭、または、前記貯炭場から払い出された石炭を搬送して前記中間貯炭容器へ供給する第2搬送装置と、
前記第1搬送装置により搬送された石炭を、前記貯炭場へ積み付けるとともに該貯炭場に積み付けられた石炭を前記第2搬送装置へ払出す積み付け払出し装置と、
前記中間貯炭容器に供給された石炭を搬送して前記石炭燃焼ボイラーへ供給する第3搬送装置を備え、さらに、
移動しながら前記貯炭場に貯められた石炭を搬送する1基以上の移動式搬送体により搬送された石炭を、前記第1搬送装置および前記第2搬送装置の少なくとも一方へ投入する1基以上の石炭投入装置を備える、石炭搬送設備。
(1) A coal receiving place for receiving coal from the outside, a coal storage place for storing coal, a coal burning boiler for burning coal to generate a heat source for power generation, and an intermediate coal storage container for supplying coal to the coal burning boiler. A coal transportation facility of a coal-fired power plant equipped with,
A first conveyor for conveying the coal at the coal receiving site;
A second transfer device that transfers the coal transferred by the first transfer device or the coal discharged from the coal storage yard and supplies the coal to the intermediate coal storage container;
A stacking and dispensing device that stacks the coal transported by the first transport device to the coal storage yard and dispenses the coal loaded in the coal storage yard to the second transport device;
A third transfer device that transfers the coal supplied to the intermediate coal storage container and supplies the coal to the coal combustion boiler;
One or more units for charging the coal transported by one or more mobile carriers that transport the coal stored in the coal yard while moving to at least one of the first transport device and the second transport device. A coal transportation facility equipped with a coal feeding device.

(2)前記貯炭場は屋外貯炭場である、1項に記載の石炭搬送設備。   (2) The coal transport facility according to item 1, wherein the coal storage yard is an outdoor coal storage yard.

(3)前記積み付け払出し装置は、前記第1搬送装置により搬送された石炭を前記貯炭場へ積み付けるとともに、前記貯炭場に積み付けられた石炭を前記第2搬送装置へ払出すスタッカ・リクレーマである、1または2項に記載の石炭搬送設備。   (3) The stacking / discharging device stacks the coal transported by the first transport device to the coal storage yard, and dispenses the coal loaded in the coal storage yard to the second transport device. The coal transportation facility according to Item 1 or 2.

(4)前記積み付け払出し装置は、前記第1搬送装置により搬送された石炭を前記貯炭場へ積み付けるスタッカと、前記貯炭場に積み付けられた石炭を前記第2搬送装置へ払出すリクレーマとを有する、1または2項に記載の石炭搬送設備。   (4) The stacking and dispensing device includes a stacker that stacks the coal transported by the first transport device to the coal storage yard, and a reclaimer that dispenses the coal loaded in the coal storage yard to the second transport device. The coal transportation facility according to 1 or 2, which further comprises:

(5)前記第1搬送装置はベルトコンベアを有する、1〜4項のいずれかに記載の石炭搬送設備。   (5) The coal transport facility according to any one of items 1 to 4, wherein the first transport device has a belt conveyor.

(6)前記第2搬送装置はベルトコンベアを有する、1〜5項のいずれかに記載の石炭搬送設備。   (6) The coal transportation facility according to any one of items 1 to 5, wherein the second transportation device has a belt conveyor.

本発明により、悪天候等により、スタッカ・リクレーマを稼働できない場合であっても、中間貯炭容器へ石炭を供給できるようになる。これにより、異常気象等の悪天候下においても、石炭燃焼ボイラーへ石炭を継続的に供給でき、石炭火力発電所を継続して運転できるようになる。   According to the present invention, coal can be supplied to the intermediate coal storage container even when the stacker / reclaimer cannot be operated due to bad weather or the like. As a result, the coal can be continuously supplied to the coal-fired boiler even under bad weather such as abnormal weather, and the coal-fired power plant can be continuously operated.

図1は、本発明に係る石炭搬送設備の一例を示す説明図である。FIG. 1 is an explanatory diagram showing an example of a coal transportation facility according to the present invention.

本発明を、添付図面を参照しながら説明する。はじめに、本明細書で用いる用語を説明する。   The present invention will be described with reference to the accompanying drawings. First, terms used in this specification will be described.

(1)石炭受入場
石炭火力発電所の外部から発電用の石炭を受け入れる場所・設備である。現在の日本国内においては、石炭船が停泊する岸壁が典型例である。石炭受入場が岸壁である場合、停泊する石炭船から石炭を揚炭するためのアンローダなどの設備を備える。石炭受入場は、岸壁に限定されるものではなく、石炭が貨車で輸送されてくる場合には貨物駅等が該当する。本明細書では、石炭受入場が石炭船用の岸壁である場合を例にとる。
(1) Coal receiving site This is a place / equipment to receive coal for power generation from outside the coal-fired power plant. In Japan today, the quay where coal ships are anchored is a typical example. When the coal receiving site is a quay, it is equipped with equipment such as an unloader for discharging coal from a docked coal ship. The coal receiving place is not limited to the quay, and when coal is transported by freight car, it is a freight station or the like. In this specification, the case where the coal receiving site is a quay for a coal ship is taken as an example.

(2)貯炭場
文字通り、石炭火力発電所の外部から受け入れた石炭を貯めておく場所・設備である。ヤードと称される屋外貯炭場が代表的である。貯炭場は、必ずしも屋外で有る必要はなく、ドーム式などの屋内貯炭場もある。石炭火力発電所の機能として必須ではないが、一定規模以上の石炭火力発電所において安定して継続運転するためには、揚炭した石炭をまず貯炭場に搬送するとともに、貯炭場として相当量の石炭を貯めておくための広い敷地を有することが事実上の必要条件である。本明細書では、屋外貯炭場である場合を例にとって説明する。
(2) Coal storage site Literally, it is a place and equipment for storing coal received from outside the coal-fired power plant. An outdoor coal storage yard called a yard is typical. Coalyards do not necessarily have to be outdoors, and there are dome-type indoor coalyards as well. Although not essential for the functioning of a coal-fired power plant, in order to stably and continuously operate coal-fired power plants of a certain scale or larger, the coal that has been pumped is first transported to a coal storage yard, and at the same time a considerable amount of coal storage yard is required. Having a large lot to store coal is a de facto requirement. In the present specification, a case of an outdoor coal yard will be described as an example.

(3)中間貯炭容器
石炭サイロ、石炭バンカなどと称される設備が典型的である。中間貯炭容器から供給される石炭を微粉炭機によって粉砕することにより微粉炭を製造し、この微粉炭を石炭燃焼ボイラーの燃焼用原料として利用する。
(3) Intermediate Coal Storage Container Equipment called coal silo, coal bunker, etc. is typical. Pulverized coal is manufactured by pulverizing coal supplied from an intermediate coal storage container with a pulverized coal machine, and this pulverized coal is used as a raw material for combustion of a coal combustion boiler.

(4)石炭燃焼ボイラー
石炭火力発電の主要設備である。74μm(200メッシュ)以下が70質量%程度の微粉炭を、空気とともに供給して燃焼させて発電用の熱源を生成する。
(4) Coal-fired boiler This is the main facility for coal-fired power generation. Pulverized coal having a particle size of 74 μm (200 mesh) or less of about 70% by mass is supplied together with air and burned to generate a heat source for power generation.

(5)第1搬送装置
石炭受入場である岸壁等から貯炭場へ石炭を搬送するための装置である。石炭船から揚炭された石炭を屋外貯炭場の近傍まで搬送するベルトコンベアが例示される。
(5) First transfer device This is a device for transferring coal from a quay, which is a coal receiving site, to a coal storage yard. An example is a belt conveyor that conveys coal unloaded from a coal ship to the vicinity of an outdoor coal storage yard.

(6)第2搬送装置
貯炭場から中間貯炭容器へ石炭を搬送するための装置である。屋外貯炭場から払い出された石炭を搬送するベルトコンベアが例示される。
(6) Second transfer device This is a device for transferring coal from the coal storage yard to the intermediate coal storage container. A belt conveyor that conveys coal discharged from an outdoor coal storage yard is exemplified.

(7)積み付け払出し装置
第1搬送装置により搬送された石炭を貯炭場へ積み付けるとともに貯炭場に積み付けられた石炭を第2搬送装置へ払出す装置である。
(7) Stacking and Discharging Device This is a device for stacking the coal transported by the first transport device to the coal storage yard and dispensing the coal loaded in the coal storage yard to the second transport device.

積み付け払出し装置は、
(i)第1搬送装置により搬送された石炭を貯炭場へ積み付けるとともに、貯炭場に積み付けられた石炭を第2搬送装置へ払出すスタッカ・リクレーマ(以下、「SR」と記載する)である場合、
(ii)第1搬送装置により搬送された石炭を貯炭場へ積み付けるスタッカ(前工程から搬送されてきた石炭を、トリッパーコンベア、ブームコンベアを介して屋外貯炭場へ積み付ける装置)と、貯炭場に積み付けられた石炭を払出すリクレーマ(ブーム先端のバケットホイールの回転により貯蔵された石炭を連続してかき取り、ブームコンベアを介して次工程に供給するコンベアへ払出す装置)とを組み合わせて構成する場合が例示される。現在ではスタッカとリクレーマの機能を併せ持つSRが用いられることが多い。
The loading and unloading device is
(I) A stacker / reclaimer (hereinafter referred to as “SR”) that loads the coal transported by the first transport device to the coal storage yard and also discharges the coal loaded in the coal storage yard to the second transport device. If there is
(Ii) Stacker for stacking the coal transported by the first transport device to the coal stockyard (a device for loading the coal transported from the previous process to the outdoor coal stockyard via the tripper conveyor and the boom conveyor), and the coal stockyard In combination with a reclaimer that discharges the coal loaded in the stack (a device that continuously scrapes the stored coal by rotating the bucket wheel at the tip of the boom and discharges it to the conveyor that supplies it to the next process via the boom conveyor) A case of configuring is exemplified. At present, SRs having both stacker and reclaimer functions are often used.

(8)配置
石炭は、通常時には、石炭受入場、第1搬送設備、貯炭場、第2搬送設備、中間貯炭容器の順番を経由して搬送される。しかし、各設備がこの順番に直列に配置されなくてもよく、各設備の設置場所の制約や利便性等を考慮して、適宜配置される。例えば、屋外貯炭場は敷地が大きいこともあり、石炭受入場、屋外貯炭場と中間貯炭容器の位置関係は直線的であるとは限らない。
(8) Arrangement Normally, coal is transported through the coal receiving site, the first transport facility, the coal storage facility, the second transport facility, and the intermediate coal storage container in this order. However, the respective facilities may not be arranged in series in this order, and may be appropriately arranged in consideration of restrictions on the installation place of each facility and convenience. For example, since an outdoor coal storage yard has a large site, the positional relationship between the coal receiving yard, the outdoor coal storage yard and the intermediate coal storage container is not always linear.

次に、本発明に係る石炭搬送設備を、添付図面を参照しながら説明する。図1は、石炭火力発電所1における本発明に係る石炭搬送設備2の一例を概念的に示す説明図である。図1に示される各要素をつなぐ矢印は、石炭の搬送方向を示す。   Next, a coal transportation facility according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is an explanatory view conceptually showing an example of a coal transportation facility 2 according to the present invention in a coal-fired power plant 1. The arrow connecting the elements shown in FIG. 1 indicates the direction of coal transportation.

図1に示すように、石炭火力発電所1は、岸壁である石炭受入場3と、屋外貯炭場4と、中間貯炭容器5と、石炭燃焼ボイラー6を備える。石炭受入場3は発電用の石炭を外部(石炭船)から受け入れる。屋外貯炭場4は受け入れた石炭を貯める。中間貯炭容器5は石炭を石炭燃焼ボイラー6へ供給する。石炭燃焼ボイラー6は石炭を燃焼して発電用の熱源を生成する。   As shown in FIG. 1, the coal-fired power plant 1 includes a coal receiving site 3 that is a quay, an outdoor coal storage site 4, an intermediate coal storage container 5, and a coal combustion boiler 6. The coal receiving site 3 receives coal for power generation from the outside (coal ship). The outdoor coal yard 4 stores the received coal. The intermediate coal storage container 5 supplies coal to the coal combustion boiler 6. The coal combustion boiler 6 burns coal to generate a heat source for power generation.

石炭搬送設備2は、第1搬送装置7と、第2搬送装置10と、積み付け払出し装置9と、第3搬送装置13を備える。   The coal transportation facility 2 includes a first transportation device 7, a second transportation device 10, a loading and unloading device 9, and a third transportation device 13.

第1搬送装置7はベルトコンベア8を有する。ベルトコンベア8は、石炭受入場3のアンローダにより石炭船から揚炭された石炭を、屋外貯炭場4の近傍まで搬送する。   The first transfer device 7 has a belt conveyor 8. The belt conveyor 8 conveys the coal unloaded from the coal ship by the unloader of the coal receiving site 3 to the vicinity of the outdoor coal storage site 4.

第2搬送装置10はベルトコンベア12を有する。ベルトコンベア12は、ベルトコンベア8により搬送されてきた石炭、または、積み付け払出し装置9により払い出されて搬送されてきた石炭を搬送して中間貯炭容器5に供給する。   The second transfer device 10 has a belt conveyor 12. The belt conveyer 12 conveys the coal conveyed by the belt conveyer 8 or the coal discharged and conveyed by the loading / discharging device 9 and supplies it to the intermediate coal storage container 5.

詳細な説明は省略するが、第1搬送装置7および第2搬送装置10はそれぞれ、複数のベルトコンベアによって構成されてもよく、1つのベルトコンベアによって構成されてもよい。また、1つのベルトコンベアによって第1搬送装置7および第2搬送装置10が構成されてもよい。言い換えると、1つのベルトコンベアの一部を、第1搬送装置7として用い、1つのベルトコンベアの他の一部を、第2搬送装置10として用いてもよい。   Although detailed description is omitted, each of the first transport device 7 and the second transport device 10 may be configured by a plurality of belt conveyors or may be configured by one belt conveyor. Further, the first conveyor 7 and the second conveyor 10 may be configured by one belt conveyor. In other words, a part of one belt conveyor may be used as the first transfer device 7, and another part of one belt conveyor may be used as the second transfer device 10.

図1に示した石炭搬送設備2では、積み付け払出し装置9として、SR11が設けられている。SR11は、ベルトコンベア8により搬送された石炭を屋外貯炭場4へ積み付けるとともに、屋外貯炭場4に積み付けられた石炭をベルトコンベア12に払出す。   In the coal transport facility 2 shown in FIG. 1, the SR 11 is provided as the loading / unloading device 9. The SR 11 loads the coal conveyed by the belt conveyor 8 onto the outdoor coal storage yard 4, and also discharges the coal loaded on the outdoor coal storage yard 4 to the belt conveyor 12.

積み付け払出し装置9を、第1搬送装置7により搬送された石炭を屋外貯炭場4へ積み付けるスタッカと、屋外貯炭場4に積み付けられた石炭を払出すリクレーマとの組み合わせにより、構成してもよい。   The stacking and dispensing device 9 is configured by a combination of a stacker that stacks the coal transported by the first transport device 7 onto the outdoor coal storage site 4 and a reclaimer that dispenses the coal stacked on the outdoor coal storage site 4. Good.

第3搬送装置13はベルトコンベア14を有する。ベルトコンベア14は、中間貯炭容器5に供給された石炭を搬送して石炭燃焼ボイラー6へ供給する。   The third transfer device 13 has a belt conveyor 14. The belt conveyor 14 conveys the coal supplied to the intermediate coal storage container 5 and supplies it to the coal combustion boiler 6.

石炭搬送設備2では、ベルトコンベア8の先端側とベルトコンベア12の後端側とが上下方向に重なって配置されている。本実施形態では、ベルトコンベア8,12の接続点17と屋外貯炭場4とが、SR11を介して接続される。   In the coal transport facility 2, the front end side of the belt conveyor 8 and the rear end side of the belt conveyor 12 are arranged so as to overlap each other in the vertical direction. In the present embodiment, the connection point 17 of the belt conveyors 8 and 12 and the outdoor coal storage yard 4 are connected via the SR 11.

積み付け払出し装置9であるSR11のベルトコンベアのベルト部分のキャリア側(石炭が載せられる部分)が図1のA方向へ移動するように、SR11を運転することにより、ベルトコンベア8により搬送されてきた石炭を屋外貯端場4へ搬送することができる。   The SR11, which is the loading and unloading device 9, is conveyed by the belt conveyor 8 by operating the SR11 so that the carrier side (portion on which coal is placed) of the belt portion of the belt conveyor moves in the direction A of FIG. The coal can be transported to the outdoor storage area 4.

また、SR11のベルトコンベアのベルト部分の上記キャリア側が図1のB方向へ移動するようにSR11を運転することにより、ベルトコンベア8により搬送されてきた石炭を貯炭場4ではなくベルトコンベア12へ搬送することができる。したがって、本実施形態では、石炭船から揚炭された石炭を、屋外貯炭場4を介することなく、第1搬送装置7、SR11のベルトコンベア、および第2搬送装置10によって中間貯炭容器5へ搬送することもできる。なお、詳細な説明は省略するが、スタッカおよびリクレーマを組み合わせて積み付け払出し装置9を構成する場合も、石炭船から揚炭された石炭を、屋外貯炭場4を介することなく中間貯炭容器5へ搬送することができるように、第1搬送装置7および第2搬送装置10が構成される。   Further, by operating SR11 so that the carrier side of the belt portion of the belt conveyor of SR11 moves in the direction B of FIG. 1, the coal conveyed by the belt conveyor 8 is conveyed to the belt conveyor 12 instead of the coal storage yard 4. can do. Therefore, in the present embodiment, the coal unloaded from the coal ship is transferred to the intermediate coal storage container 5 by the first transfer device 7, the SR11 belt conveyor, and the second transfer device 10 without passing through the outdoor coal storage site 4. You can also do it. Although detailed description is omitted, even when the stacker and reclaimer are combined to form the loading / unloading device 9, the coal unloaded from the coal ship is transferred to the intermediate coal storage container 5 without passing through the outdoor coal storage site 4. The first transfer device 7 and the second transfer device 10 are configured so that they can be transferred.

このように、第2搬送装置10であるベルトコンベア12は、第1搬送装置7であるベルトコンベア8により搬送された石炭、または、SR11により屋外貯炭場4から払い出された石炭を搬送して中間貯炭容器5へ供給する。   As described above, the belt conveyor 12 that is the second conveyor 10 conveys the coal that is conveyed by the belt conveyor 8 that is the first conveyor 7 or the coal that has been discharged from the outdoor coal yard 4 by the SR 11. Supply to the intermediate coal storage container 5.

本発明に係る石炭搬送設備2では、移動式搬送体15が利用される。移動式搬送体15は、SR11による屋外貯炭場4からの石炭の払い出しが悪天候等により不可能になった場合に、屋外貯炭場4においてSR11が移動する範囲に移動して石炭を、第1搬送装置7または第2搬送装置10の一方または双方へ搬送する。例えば、移動式ベルトコンベア、自走式ベルトコンベア、ショベルローダやダンプトラックなどを適宜組合せて移動式搬送体15とすればよい。   In the coal transportation facility 2 according to the present invention, the mobile carrier 15 is used. When the delivery of coal from the outdoor coal storage yard 4 by the SR 11 becomes impossible due to bad weather or the like, the mobile carrier 15 moves to a range in which the SR 11 moves in the outdoor coal yard 4 and transfers the coal to the first carrier. The sheet is conveyed to one or both of the apparatus 7 and the second conveyor 10. For example, a movable belt conveyor, a self-propelled belt conveyor, a shovel loader, a dump truck, or the like may be appropriately combined to form the movable carrier 15.

また、本発明に係る石炭搬送設備2は石炭投入装置16を有する。石炭投入装置16は、SR11による石炭の払い出しが悪天候等により不可能になった場合に、移動式搬送体15によって搬送されてきた石炭を、第1搬送装置7であるベルトコンベア8、および第2搬送装置10であるベルトコンベア12の少なくとも一方に供給する装置である。   Further, the coal transportation facility 2 according to the present invention has a coal charging device 16. The coal feeding device 16 transfers the coal conveyed by the movable carrier 15 to the belt conveyor 8 which is the first conveyor device 7 and the second conveyor when the discharge of the coal by the SR 11 becomes impossible due to bad weather or the like. It is a device that supplies to at least one of the belt conveyors 12 that are the transfer devices 10.

ベルトコンベア8,12への石炭投入装置16の設置数を増やすとともにそれぞれの石炭投入装置16へ石炭を投入する移動式搬送体15の稼動台数を増やすことにより、中間貯炭容器5への石炭の搬送量を増やすことができる。   Conveying coal to the intermediate coal storage container 5 by increasing the number of coal feeding devices 16 installed on the belt conveyors 8 and 12 and increasing the number of operating mobile carriers 15 that feed coal to each coal feeding device 16. The amount can be increased.

ベルトコンベア8,12のベルト部分に石炭を供給できればよいので、石炭投入装置16は、コンベア長さを調整できる自走式ベルトコンベアなどであればよい。   Since it suffices that coal can be supplied to the belt portions of the belt conveyors 8 and 12, the coal feeding device 16 may be a self-propelled belt conveyor or the like that can adjust the conveyor length.

別の方式としては、石炭の搬送は移動式搬送体15により行い、石炭投入装置16は、搬送されてきた石炭を、ベルトコンベア8,12へ円滑に供給する機能のみを有する装置であってもよい。この石炭投入装置16は、ベルトコンベア8,12の運転を妨げないように、ベルトコンベア8,12を跨いで設置されて、その上部で移動式搬送体15により搬送されてきた石炭を受入れ、シュート状の装入ガイドにより、ベルトコンベア8,12のベルト部分に石炭を供給すればよい。   As another method, even if the coal is carried by the mobile carrier 15 and the coal feeding device 16 has only the function of smoothly supplying the carried coal to the belt conveyors 8 and 12. Good. The coal feeding device 16 is installed across the belt conveyors 8 and 12 so as not to hinder the operation of the belt conveyors 8 and 12, and receives the coal conveyed by the movable carrier 15 at the upper portion thereof and shoots it. It suffices to supply coal to the belt portions of the belt conveyors 8 and 12 with a charging guide having a shape.

図1に例示するように、本発明を適用される石炭火力発電所1は、屋外貯炭場4を有しており、石炭受入場3と屋外貯炭場4を結ぶ第1搬送装置7と、屋外貯炭場4と中間貯炭容器5を結ぶ第2搬送装置10と、積み付け払出し装置9を有する。換言すると、石炭火力発電所1は、石炭受入場3と中間貯炭容器5がベルトコンベア8,12により結ばれ、ベルトコンベア8,12の中間部分に配置されたSR11により、屋外貯炭場4との間で石炭の積み付けおよび払出しを行っている。   As illustrated in FIG. 1, the coal-fired power plant 1 to which the present invention is applied has an outdoor coal storage yard 4, and a first transfer device 7 connecting the coal receiving yard 3 and the outdoor coal yard 4, and the outdoor. It has the 2nd conveyance apparatus 10 which connects the coal yard 4 and the intermediate coal storage container 5, and the loading and unloading apparatus 9. In other words, in the coal-fired power plant 1, the coal receiving site 3 and the intermediate coal storage container 5 are connected by the belt conveyors 8 and 12, and the outdoor coal storage site 4 is connected by the SR11 arranged in the intermediate portion of the belt conveyors 8 and 12. Coal is loaded and unloaded between.

通常時、石炭は、石炭受入場3から第1搬送装置7により搬送され、屋外貯炭場4で保管される。その後、屋外貯炭場4から第2搬送装置10により中間貯炭容器5へ搬送される。   Normally, coal is transferred from the coal receiving site 3 by the first transfer device 7 and stored in the outdoor coal storage site 4. After that, the second coal transfer device 10 transfers the coal from the outdoor coal storage yard 4 to the intermediate coal storage container 5.

中間貯炭容器5は、2個の貯槽(1750tと800t)および4台の石炭バンカ(各450t)により、計4350トンの容量(A)を有する。石炭燃焼ボイラー6の定常運転時の1時間当たりの石炭消費量(B)は187トン/時である。第2搬送装置10から中間貯炭容器5へ石炭が搬送されなかった場合の最大運転時間は、上記(A)/(B)から算出でき、約23時間である。   The intermediate coal storage container 5 has a total capacity (A) of 4350 tons due to two storage tanks (1750t and 800t) and four coal bunkers (450t each). The coal consumption (B) per hour during steady operation of the coal-fired boiler 6 is 187 tons / hour. The maximum operating time when the coal is not transferred from the second transfer device 10 to the intermediate coal storage container 5 can be calculated from the above (A) / (B) and is about 23 hours.

なお、石炭燃焼ボイラー6の運転量を、100%負荷運転ではなく例えば75%とした場合でも、石炭消費量(B2)は140トン/時であり、(A)/(B2)から算出される最大運転時間は約31時間である。   Even when the operation amount of the coal combustion boiler 6 is set to 75% instead of 100% load operation, the coal consumption amount (B2) is 140 tons / hour, which is calculated from (A) / (B2). The maximum operating time is about 31 hours.

ここで、第1搬送装置7および第2搬送装置10ではない搬送系統から、中間貯炭容器5へA(t/h)の能力で石炭を搬送できるとすれば、定常運転時の1時間あたりの石炭消費量(187t/h)の場合でも、最大運転時間Hは、H=4350/(187−A)に延長できることになる(A=0の時、H=23時間)。   Here, assuming that coal can be transferred to the intermediate coal storage container 5 with a capacity of A (t / h) from a transfer system that is not the first transfer device 7 and the second transfer device 10, it is Even in the case of coal consumption (187 t / h), the maximum operating time H can be extended to H = 4350 / (187-A) (when A = 0, H = 23 hours).

上式から、例えば最大運転時間H=48時間(2日間)を確保するためにはA=96(トン/時)であり、H=120時間(5日間)を確保するためには、A=151(トン/時)である。   From the above formula, for example, A = 96 (ton / hour) for securing the maximum operating time H = 48 hours (2 days), and A = 96 for securing H = 120 hours (5 days). It is 151 (ton / hour).

このため、中間貯炭容器5へ能力At/hで石炭を搬送する能力を有する設備(以下、「緊急搬送設備」という)として、移動式搬送体15および石炭投入装置16を設置した。そして、悪天候等によりSR11の払い出し機能が停止したことを想定し、SR11の払い出し機能を用いない搬送系統(すなわち、屋外貯炭場4を介さない搬送系統)により、石炭を中間貯炭容器5へ搬送した。   For this reason, the mobile carrier 15 and the coal charging device 16 are installed as equipment (hereinafter referred to as “emergency transportation equipment”) having the ability to transport coal to the intermediate coal storage container 5 with the capacity At / h. Then, assuming that the delivery function of SR11 has stopped due to bad weather or the like, the coal was delivered to the intermediate coal storage container 5 by the delivery system that does not use the delivery function of SR11 (that is, the delivery system that does not go through the outdoor coal yard 4). ..

移動式搬送体15は、ショベルローダ3台、ダンプトラック(容量18t)2台とした。石炭投入装置16は、第1搬送装置7では第1ベルトコンベア8を覆うように設置した。設置した状態であっても第1ベルトコンベア8の稼働に支障はなかった。   The mobile carriers 15 were three shovel loaders and two dump trucks (capacity 18t). The coal feeding device 16 was installed so as to cover the first belt conveyor 8 in the first transfer device 7. Even in the installed state, the operation of the first belt conveyor 8 was not hindered.

第1ベルトコンベア8は、幅1050mmであり、石炭投入装置16は、高さ800mm、長さ4825mm、幅2540mmの外径寸法であって、投入ホッパは、上部幅は2540mm、下部幅は1300mmとした。   The first belt conveyor 8 has a width of 1050 mm, the coal charging device 16 has an outer diameter of 800 mm in height, 4825 mm in length and 2540 mm in width, and the charging hopper has an upper width of 2540 mm and a lower width of 1300 mm. did.

屋外貯炭場4の石炭を、ショベルローダ2台によりダンプトラック15に積み込んだ。ダンプトラック15は、屋外貯炭場4から石炭投入装置16の近傍まで走行して、一時貯留バンカに石炭を排出した。一時貯留バンカの石炭を、1台のショベルローダ15により積み付け、ショベルローダ15が移動して、石炭投入装置16の投入ホッパの上から、石炭を投入して第1ベルトコンベア8に供給した。   The coal in the outdoor coal stockyard 4 was loaded on the dump truck 15 by two shovel loaders. The dump truck 15 traveled from the outdoor coal storage yard 4 to the vicinity of the coal charging device 16 and discharged coal to the temporary storage bunker. The coal in the temporary storage bunker was loaded by one shovel loader 15, the shovel loader 15 moved, and the coal was charged from the charging hopper of the coal charging device 16 and supplied to the first belt conveyor 8.

石炭は、SR11による積み付けおよび払出しを行われず、第1ベルトコンベア8および第2ベルトコンベア12を直送して中間貯炭容器5へ送られた。これにより、中間貯炭容器5の石炭保有量が増加した。本例では、A=152(トン/時)を得られ、最大運転時間H=124時間を確保できた。   The coal was not loaded and discharged by the SR 11, and was directly sent to the first belt conveyor 8 and the second belt conveyor 12 and sent to the intermediate coal storage container 5. As a result, the amount of coal held in the intermediate coal storage container 5 increased. In this example, A = 152 (ton / hour) was obtained, and the maximum operating time H = 124 hours could be secured.

1 石炭火力発電所
2 本発明に係る石炭搬送設備
3 石炭受入場
4 屋外貯炭場
5 中間貯炭容器
6 石炭燃焼ボイラー
7 第1搬送装置
8 ベルトコンベア
9 積み付け払出し装置
10 第2搬送装置
11 スタッカ・リクレーマ
12 ベルトコンベア
13 第3搬送装置
14 ベルトコンベア
15 移動式搬送体
16 石炭投入装置
17 接続点

DESCRIPTION OF SYMBOLS 1 Coal-fired power plant 2 Coal transfer facility 3 according to the present invention 3 Coal receiving site 4 Outdoor coal storage site 5 Intermediate coal storage container 6 Coal combustion boiler 7 1st transfer device 8 Belt conveyor 9 Loading and discharging device 10 2nd transfer device 11 Stacker Reclaimer 12 Belt conveyor 13 Third transfer device 14 Belt conveyor 15 Mobile transfer device 16 Coal charging device 17 Connection point

Claims (6)

石炭を外部から受け入れる石炭受入場と、石炭を貯める貯炭場と、石炭を燃焼して発電用熱源を生成する石炭燃焼ボイラーと、石炭を前記石炭燃焼ボイラーへ供給する中間貯炭容器とを備える石炭火力発電所の石炭搬送設備であって、
前記石炭受入場の石炭を搬送する第1搬送装置と、
該第1搬送装置により搬送された石炭、または、前記貯炭場から払い出された石炭を搬送して前記中間貯炭容器へ供給する第2搬送装置と、
前記第1搬送装置により搬送された石炭を、前記貯炭場へ積み付けるとともに該貯炭場に積み付けられた石炭を前記第2搬送装置へ払出す積み付け払出し装置と、
前記中間貯炭容器に供給された石炭を搬送して前記石炭燃焼ボイラーへ供給する第3搬送装置を備え、さらに、
移動しながら前記貯炭場に貯められた石炭を搬送する1基以上の移動式搬送体により搬送された石炭を、前記第1搬送装置および前記第2搬送装置の少なくとも一方へ投入する1基以上の石炭投入装置を備える、石炭搬送設備。
A coal-fired thermal power plant including a coal receiving place for receiving coal from the outside, a coal storage place for storing coal, a coal burning boiler for burning coal to generate a heat source for power generation, and an intermediate coal storage container for supplying coal to the coal burning boiler. A coal transportation facility at a power plant,
A first conveyor for conveying the coal at the coal receiving site;
A second transfer device that transfers the coal transferred by the first transfer device or the coal discharged from the coal storage yard and supplies the coal to the intermediate coal storage container;
A stacking and dispensing device that stacks the coal transported by the first transport device to the coal storage yard and dispenses the coal loaded in the coal storage yard to the second transport device;
A third transfer device that transfers the coal supplied to the intermediate coal storage container and supplies the coal to the coal combustion boiler;
One or more units for charging the coal transported by one or more mobile carriers that transport the coal stored in the coal yard while moving to at least one of the first transport device and the second transport device. A coal transportation facility equipped with a coal feeding device.
前記貯炭場は屋外貯炭場である、請求項1に記載の石炭搬送設備。   The coal transportation facility according to claim 1, wherein the coal storage yard is an outdoor coal storage yard. 前記積み付け払出し装置は、前記第1搬送装置により搬送された石炭を前記貯炭場へ積み付けるとともに、前記貯炭場に積み付けられた石炭を前記第2搬送装置へ払出すスタッカ・リクレーマである、請求項1または2に記載の石炭搬送設備。   The stacking and dispensing device is a stacker / reclaimer that stacks the coal transported by the first transport device to the coal storage yard and dispenses the coal loaded in the coal storage yard to the second transport device. The coal transportation facility according to claim 1. 前記積み付け払出し装置は、前記第1搬送装置により搬送された石炭を前記貯炭場へ積み付けるスタッカと、前記貯炭場に積み付けられた石炭を前記第2搬送装置へ払出すリクレーマとを有する、請求項1または2に記載の石炭搬送設備。   The stacking and dispensing device includes a stacker that stacks the coal transported by the first transport device to the coal storage yard, and a reclaimer that dispenses the coal loaded in the coal storage yard to the second transport device. The coal transportation facility according to claim 1. 前記第1搬送装置はベルトコンベアを有する、請求項1〜4のいずれかに記載の石炭搬送設備。   The said 1st conveyance apparatus is a coal conveyance installation in any one of Claims 1-4 which has a belt conveyor. 前記第2搬送装置はベルトコンベアを有する、請求項1〜5のいずれかに記載の石炭搬送設備。

The said 2nd conveyance apparatus is a coal conveyance equipment in any one of Claims 1-5 which has a belt conveyor.

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JP2020037001A (en) * 2019-12-11 2020-03-12 株式会社三洋物産 Game machine
CN114014028A (en) * 2021-11-05 2022-02-08 国能(绥中)发电有限责任公司 Bucket wheel machine and control method of bucket wheel machine
CN114988136A (en) * 2022-04-25 2022-09-02 国能(绥中)发电有限责任公司 Coal blending system and blending method
JP7551490B2 (en) 2020-12-18 2024-09-17 三菱重工業株式会社 How to set up a bunker

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CN114988136A (en) * 2022-04-25 2022-09-02 国能(绥中)发电有限责任公司 Coal blending system and blending method

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