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JPS623081B2 - - Google Patents
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JPS623081B2 - - Google Patents

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Publication number
JPS623081B2
JPS623081B2 JP54059161A JP5916179A JPS623081B2 JP S623081 B2 JPS623081 B2 JP S623081B2 JP 54059161 A JP54059161 A JP 54059161A JP 5916179 A JP5916179 A JP 5916179A JP S623081 B2 JPS623081 B2 JP S623081B2
Authority
JP
Japan
Prior art keywords
sulfur
converter
containing gas
gas
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP54059161A
Other languages
Japanese (ja)
Other versions
JPS55154308A (en
Inventor
Kenichi Gomi
Takao Hishinuma
Norio Arashi
Hidetoshi Akimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Mitsubishi Power Ltd
Original Assignee
Babcock Hitachi KK
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Babcock Hitachi KK, Hitachi Ltd filed Critical Babcock Hitachi KK
Priority to JP5916179A priority Critical patent/JPS55154308A/en
Publication of JPS55154308A publication Critical patent/JPS55154308A/en
Publication of JPS623081B2 publication Critical patent/JPS623081B2/ja
Granted legal-status Critical Current

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  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、イオウの回収装置に係り、特に酸化
イオウ、水蒸気および酸素を含む排出ガス、例え
ば石炭または燃料油の燃焼によつて生じる煙道ガ
スからイオウ酸化物を除去し、単体イオウを回収
する装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a sulfur recovery device, in particular for the recovery of sulfur and flue gases, such as those produced by the combustion of coal or fuel oil, containing exhaust gases such as sulfur oxides, water vapor and oxygen. This invention relates to an apparatus for removing sulfur oxides from gas and recovering elemental sulfur.

〔従来の技術〕[Conventional technology]

イオウ濃度の高い石炭や燃料油を燃焼させた排
ガス中には、多量のイオウ酸化物が含まれ、大気
汚染の元凶の1つとなつている。
Exhaust gas from burning coal or fuel oil with high sulfur concentrations contains large amounts of sulfur oxides, which are one of the causes of air pollution.

従来、排煙からイオウ酸化物(二酸化イオウお
よび三酸化イオウを総称する)を除去する方法と
しては、いわゆる石灰−石こう法がよく知られて
いる。しかし、この方法においては、火力発電所
等のように設備が大型化すると排出される石膏な
どの回収量が膨大になり、その運搬等に多大のコ
ストを要し、また投棄するにしてもその場所の確
保が容易ではないという欠点がある。
Conventionally, the so-called lime-gypsum method is well known as a method for removing sulfur oxides (sulfur dioxide and sulfur trioxide are collectively referred to) from flue gas. However, with this method, as the equipment becomes larger, such as in thermal power plants, the amount of gypsum and other waste that is discharged becomes enormous, and it costs a lot of money to transport it. The disadvantage is that it is not easy to secure a place.

そこで近年、排ガス中のイオウ酸化物を、石膏
のような硫酸塩の形ではなく、処理の容易な単体
イオウとして回収し、排出量を軽減する方法が提
案され、種々のプロセスが開発されている。排ガ
ス中のイオウ酸化物から単体イオウを回収するプ
ロセスの1つは湿式法とよばれ、イオウ酸化物の
吸収にアルカリ等の水溶液を使用するものであ
る。しかしこの方法は、多量の水を要し、またプ
ロセスから排水が出ることが避けられず、新たに
排水の処理設備を要するという欠点がある。
Therefore, in recent years, methods have been proposed to reduce emissions by recovering sulfur oxides in exhaust gas as simple sulfur, which is easy to treat, rather than in the form of sulfates like gypsum, and various processes have been developed. . One of the processes for recovering elemental sulfur from sulfur oxides in exhaust gas is called a wet method, which uses an aqueous solution of an alkali or the like to absorb sulfur oxides. However, this method has the disadvantage that it requires a large amount of water, and that wastewater is inevitably produced in the process, requiring new wastewater treatment equipment.

一方、乾式プロセスとしては、排ガス中のイオ
ウ酸化物を活性炭や半成コークスを用いて吸着除
去する方法が提案されている。特に半成コークス
を吸着材とする方法は、石炭焚ボイラーの排ガス
の脱硫プロセスにおいてボイラー原料の石炭の一
部を利用して吸着材を得ることができるので、有
利である。
On the other hand, as a dry process, a method has been proposed in which sulfur oxides in exhaust gas are adsorbed and removed using activated carbon or semi-formed coke. In particular, the method of using semi-formed coke as an adsorbent is advantageous because the adsorbent can be obtained by using part of the coal as a raw material for the boiler in the desulfurization process of the exhaust gas of a coal-fired boiler.

半成コークス等の炭素質吸着材を用いる排ガス
脱硫においては、排ガス中にイオウ酸化物ととも
に酸素およびスチームが共存するので、イオウ酸
化物は半成コークス上に硫酸の形で吸着される。
このように半成コークス上に濃縮された硫酸は、
350〜400℃に加熱することにより、二酸化イオウ
(SO2)の形に分解されて半成コークスから脱離さ
れる。この脱離ガス中のSO2濃度は、煙道排ガス
中の濃縮に比べてはるかに高いので、さらにこれ
を転換器に導入し、800℃以上の温度で炭素質物
質(例えば半成コークス)と反応させることによ
り、下記(1)式に示すように単体イオウを回収する
ことができる。
In exhaust gas desulfurization using a carbonaceous adsorbent such as semi-formed coke, since oxygen and steam coexist with sulfur oxides in the exhaust gas, sulfur oxides are adsorbed on the semi-formed coke in the form of sulfuric acid.
The sulfuric acid concentrated on the semi-formed coke in this way is
By heating to 350-400°C, it is decomposed into the form of sulfur dioxide (SO 2 ) and released from the semi-formed coke. Since the SO 2 concentration in this desorbed gas is much higher than the concentration in the flue gas, it is further introduced into the converter and converted into carbonaceous materials (e.g. semi-formed coke) at temperatures above 800°C. By reacting, elemental sulfur can be recovered as shown in the following formula (1).

SO2+C→CO2+S+7.69Kcal/mole (1) この反応で副生するCO2は、下記(2)式に示すよ
うに、炭素質物質とさらに反応してCOを生成す
る。
SO 2 +C→CO 2 +S+7.69Kcal/mole (1) CO 2 produced as a by-product in this reaction further reacts with the carbonaceous material to generate CO, as shown in equation (2) below.

1/2CO2+1/2C→CO−20.11Kcal/mole (2) これらの反応速度は温度に強く依存し、温度が
高いほど大きくなる傾向にあり、また(1)式の反応
は僅かに発熱反応であるが、(2)式の反応は吸熱量
の大きい反応であるため、反応が進行するにつれ
て転換器内の温度が部分的または全体的に低下
し、未反応のSO2が排出されるという欠点があ
る。すなわち、SO2含有ガスを転換器の下部から
導入して反応させる場合、まず(1)式の反応が起こ
つて反応器の温度が少し上昇するが、生成した
CO2が(2)式に従つて反応するため、転換器内の温
度が除々に低下し、イオウの転換率が低くなる。
1/2CO 2 +1/2C→CO−20.11Kcal/mole (2) These reaction rates strongly depend on temperature, and tend to increase as the temperature increases, and the reaction in equation (1) is slightly exothermic. However, since the reaction in equation (2) is a reaction with a large endothermic amount, as the reaction progresses, the temperature inside the converter decreases partially or completely, and unreacted SO 2 is discharged. There are drawbacks. In other words, when SO 2 -containing gas is introduced from the bottom of the converter and reacted, the reaction of equation (1) occurs first and the temperature of the reactor rises slightly, but the produced
Since CO 2 reacts according to equation (2), the temperature inside the converter gradually decreases and the sulfur conversion rate decreases.

そこで、このような問題を解決するために転換
器内に酸素含有ガスSO2含有ガスと同伴させなが
ら導入し、転換器内の石炭を燃焼させ転換器内温
度を維持する従来例が存在する(特開昭53−
78993号公報記載のもの)。
Therefore, in order to solve this problem, there is a conventional example in which oxygen-containing gas and SO 2- containing gas are introduced into the converter together with coal, and the coal inside the converter is combusted to maintain the temperature inside the converter ( Japanese Unexamined Patent Publication 1973-
(as described in Publication No. 78993).

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかし、転解器内の炭素質粒子は流動層ではな
く、移動層であるため、一つの反応器内で発熱反
応と吸熱反応を同時に行わせた温度を一定に保つ
のは困難である。
However, since the carbonaceous particles in the converter are not in a fluidized bed but in a moving bed, it is difficult to maintain a constant temperature at which an exothermic reaction and an endothermic reaction are simultaneously performed in one reactor.

また、前記(1)の単体イオウを回収する反応温度
の最適温度範囲は、750℃±50℃と一般に狭い。
Furthermore, the optimum temperature range of the reaction temperature for recovering elemental sulfur in (1) above is generally narrow at 750°C±50°C.

したがつて、上記従来例では転換器内温度をこ
の値に制御することは困難なため、イオウの回収
効率が十分でないという問題があつた。
Therefore, in the conventional example described above, since it is difficult to control the temperature inside the converter to this value, there is a problem that the sulfur recovery efficiency is not sufficient.

このような問題点を解決するために、本発明は
イオウの回収効率を高くすることができるイオウ
の回収装置を提供することを目的とする。
In order to solve these problems, an object of the present invention is to provide a sulfur recovery device that can improve the sulfur recovery efficiency.

〔問題点を解決するための手段〕[Means for solving problems]

上記問題点を解決するために本発明は、炭素質
吸着剤が備えられた吸着器と、 該吸着器にイオウ酸化物を含有するガスを供給
するイオウ酸化物含有ガス供給装置と、 当該イオウ酸化物を硫酸となし、該硫酸を吸着
した前記炭素質吸着剤を加熱することにより二酸
化イオウ含有ガスとして脱離される脱離器と、 炭素質固体を備えてなり、当該炭素質固体と前
記脱離器から供給された二酸化イオウとを接触反
応させて、当該二酸化イオウを単体イオウに転換
する転換器と、 該転換器に酸素含有ガスを供給する酸素ガス供
給装置とを備えてなるイオウの回収装置におい
て、 前記転換器を複数個設けるとともに、 該各転換器内温度を検出する温度検出器と、 当該各転換器内の検出温度値を適正温度値に合
致させるように二酸化イオウ含有ガスと酸素含有
ガスとを選択的に該各転換器に供給するガス流路
制御装置とを備えてなり、複数の転換器の間で二
酸化イオウ含有ガスの導入と、酸素含有ガスの導
入とを交互に切換えて行なうことを特徴とするイ
オウの回収装置である。
In order to solve the above problems, the present invention provides: an adsorbent equipped with a carbonaceous adsorbent; a sulfur oxide-containing gas supply device for supplying a gas containing sulfur oxide to the adsorbent; and the sulfur oxide. a desorber in which the sulfuric acid is desorbed as a sulfur dioxide-containing gas by heating the carbonaceous adsorbent that has adsorbed the sulfuric acid, and a carbonaceous solid, the carbonaceous solid and the desorber are A sulfur recovery device comprising: a converter that converts the sulfur dioxide into elemental sulfur through a catalytic reaction with sulfur dioxide supplied from a container; and an oxygen gas supply device that supplies an oxygen-containing gas to the converter. , a plurality of the converters are provided, and a temperature detector for detecting the temperature inside each converter, and a sulfur dioxide-containing gas and an oxygen-containing gas so as to match the detected temperature value in each converter with an appropriate temperature value. a gas flow path control device that selectively supplies the gas to each of the converters, and alternately switches the introduction of the sulfur dioxide-containing gas and the introduction of the oxygen-containing gas between the plurality of converters. This is a sulfur recovery device characterized by:

典型的には、本発明は2つ以上の転換器を用
い、各転換器の温度を検出し、一方の転換器の温
度が反応の進行につれて設定値より低下する時点
でイオウ酸化物含有ガスの導入を中止し、酸素含
有ガス(例えば空気)を導入するとともに、他方
の転換器にはイオウ酸化物含有ガスを導入してイ
オウの回収を行ない、前記一方の転換器の温度が
所定の値に復帰し、かつ他方の転換器の温度が低
下する時点で、前記一方の転換器への酸素含有ガ
スの導入を中止し、イオウ含有ガスを導入してイ
オウの回収を行ない、同時に他方の転換器へのイ
オウ含有ガスの導入を中止し、酸素含有ガスの導
入を行ない、以下、この操作を交互に繰返して転
換器の反応温度を適正値に保つものである。
Typically, the present invention uses two or more converters, detects the temperature of each converter, and switches the sulfur oxide-containing gas at the point where the temperature of one converter falls below a set point as the reaction progresses. The introduction is stopped, an oxygen-containing gas (for example, air) is introduced, and a sulfur oxide-containing gas is introduced into the other converter to recover sulfur, and the temperature of the one converter reaches a predetermined value. When the temperature returns to normal and the temperature of the other converter decreases, the introduction of oxygen-containing gas to the one converter is stopped, sulfur-containing gas is introduced to recover sulfur, and at the same time, the other converter is The introduction of the sulfur-containing gas to the converter is stopped, and the oxygen-containing gas is introduced, and this operation is then repeated alternately to maintain the reaction temperature of the converter at an appropriate value.

本発明は、二酸化イオウ含有ガスおよび酸素含
有ガスの各導入口、温度検出器、炭素質固体の導
入口および残渣の排出口、ならびに単体イオウを
含むガスの排出口を備えた転換器を少なくとも2
基有し、温度検出器およびガスの導入ラインに設
けられたバルブと連結する制御装置により、各ガ
スの導入ラインのバルブの開閉を制御することに
より容易に行なうことができる。
The present invention provides at least two converters each having an inlet for a sulfur dioxide-containing gas and an oxygen-containing gas, a temperature sensor, an inlet for a carbonaceous solid, an outlet for a residue, and an outlet for a gas containing elemental sulfur.
This can be easily carried out by controlling the opening and closing of the valves of each gas introduction line using a controller connected to a temperature sensor and a valve provided on the gas introduction line.

〔作用〕[Effect]

上記本発明の構成によれば、転換器内の炭素物
質の燃焼反応(酸素含有ガスと炭素質吸着剤との
発熱反応)と、イオウの転換反応(SO2と炭素と
の吸熱反応)を別々に行なわせるため、装置全体
に対するSO2含有ガスを連続して供給しても転換
器内の温度制御が確実に行なわれる。
According to the above configuration of the present invention, the combustion reaction of carbon material in the converter (exothermic reaction between oxygen-containing gas and carbonaceous adsorbent) and the conversion reaction of sulfur (endothermic reaction between SO 2 and carbon) are carried out separately. Therefore, the temperature inside the converter can be reliably controlled even if the SO 2 -containing gas is continuously supplied to the entire device.

〔実施例〕〔Example〕

第1図は、排ガス脱硫におけるイオウの回収装
置の全体構成図、第2図は第1図の装置のうちの
転換器の詳細を示す構成図である。
FIG. 1 is an overall configuration diagram of a sulfur recovery device for exhaust gas desulfurization, and FIG. 2 is a configuration diagram showing details of a converter in the device of FIG. 1.

第1図において石炭焚きボイラー6の排ガス
は、導管8により吸着器10に導びかれ、石炭か
ら生成した半成コークスと接触して、イオウ酸化
物が吸着除去される。この工程は、例えば移動層
のような形式で、ガスと半成コークスを垂直方向
に接触させることにより行なわれる。この際の吸
着器の温度は、例えば150℃程度が適当である。
吸着剤の半成コークスは、ボイラー原料の石炭の
一部を乾留器24に導びいて製造される。すなわ
ち、乾留器24において石炭は600〜800℃の温度
で乾留され、半成コークスと共にガス、タールが
生成される。ガスとタールは、導管26により抜
き出され、燃焼等によりプロセスの熱源として使
用することができる。乾留器24で生成した半成
コークスは、イオウ酸化物の吸着能を向上させる
ため、賦活器30に送られ、スチームと酸素含有
ガスとによつて部分燃焼され、賦活される。賦活
器30で発生した水素(H2)、一酸化炭素
(CO)、二酸化炭素(CO2)に富むガスは導管32
により抜き出され、例えば燃料として使用され
る。賦活された半成コークスは、導管22および
42により、それぞれ吸着器10および第2図で
図示する2基の転換器46に送られる。
In FIG. 1, exhaust gas from a coal-fired boiler 6 is led to an adsorber 10 through a conduit 8, where it comes into contact with semi-formed coke produced from coal, and sulfur oxides are adsorbed and removed. This process is carried out by bringing the gas and the semi-formed coke into vertical contact, for example in the form of a moving bed. The temperature of the adsorber at this time is, for example, approximately 150°C.
Semi-formed coke, which is an adsorbent, is produced by introducing a portion of coal, which is a raw material for a boiler, into a carbonizer 24. That is, coal is carbonized in the carbonization device 24 at a temperature of 600 to 800°C, and gas and tar are produced along with semi-formed coke. The gas and tar can be extracted via conduit 26 and used as a heat source for the process, such as by combustion. The semi-formed coke produced in the carbonization device 24 is sent to the activator 30, where it is partially combusted and activated by steam and oxygen-containing gas, in order to improve its ability to adsorb sulfur oxides. Gas rich in hydrogen (H 2 ), carbon monoxide (CO), and carbon dioxide (CO 2 ) generated in the activator 30 is transferred to the conduit 32
is extracted and used as fuel, for example. The activated semi-coke is conveyed by conduits 22 and 42, respectively, to adsorber 10 and two converters 46, illustrated in FIG.

導管8中の排ガス中にはイオウ酸化物と共に、
酸素、スチームが含まれているため、吸着器10
においてイオウ酸化物は硫酸の形で半成コークス
上に吸着されている。硫酸を吸着した半成コーク
スは脱離器14に送られ、その途中で粉化したも
のは導管20によりボイラーに戻され、燃焼され
る。
The exhaust gas in the conduit 8 contains sulfur oxides,
Adsorber 10 contains oxygen and steam.
In , sulfur oxides are adsorbed on semi-formed coke in the form of sulfuric acid. The semi-formed coke that has adsorbed sulfuric acid is sent to the desorber 14, and what is pulverized on the way is returned to the boiler through the conduit 20 and burned.

脱離器14において、半成コークス上の硫酸
は、300〜400℃の温度で、二酸化イオウの形に分
解され、二酸化イオウに富むガスは導管44によ
り転換器46に送られる。再出された半成コーク
スは導管16により吸着器10に循環され、再使
用される。
In desorber 14, the sulfuric acid on the semi-coke is decomposed to the form of sulfur dioxide at a temperature of 300 DEG to 400 DEG C., and the sulfur dioxide-rich gas is sent by conduit 44 to converter 46. The recycled semi-formed coke is circulated through conduit 16 to adsorber 10 and reused.

次に第2図において、二酸化イオウの脱離器1
4から、導管44によりバルブ68またはバルブ
70を介して、二酸化イオウ含有ガスが転換器4
6Aまたは転換器46Bに導入される。バルブ6
8またはバルブ70は、バルブ制御盤80の信号
により交互に開閉が行なわれる。転換器への半成
コークスは導入管42Aまたは42Bから供給さ
れ、その反応残渣(実質的に灰分を含む)は抜出
管74Aまたは74Bにより系外に抜き出され、
後の処理工程に送られる。転換器内で生成したイ
オウ、CO、CO2は、ガス出口管50Aまたは5
0Bにより系外に抜き出され、後段の処理工程に
導びかれる。空気は、ブロワーから導管82によ
りバルブ64またはバルブ66を介して、転換器
46Aまたは転換器46Bに導入される。空気バ
ルブ64またはバルブ66は制御盤80からの信
号により開閉が行なわれる。
Next, in FIG. 2, the sulfur dioxide desorber 1
4, the sulfur dioxide-containing gas is transferred by conduit 44 via valve 68 or valve 70 to converter 4.
6A or converter 46B. Valve 6
The valves 8 and 70 are alternately opened and closed by signals from a valve control panel 80. Semi-formed coke to the converter is supplied from the inlet pipe 42A or 42B, and the reaction residue (substantially containing ash) is extracted out of the system by the extractor pipe 74A or 74B.
Sent to later processing steps. Sulfur, CO, and CO2 generated in the converter are removed from the gas outlet pipe 50A or 5
It is extracted out of the system by 0B and guided to the subsequent processing step. Air is introduced from the blower by conduit 82 through valve 64 or valve 66 to converter 46A or converter 46B. The air valve 64 or the valve 66 is opened or closed by a signal from a control panel 80.

バルブ制御盤80は、転換器内の温度を検出
し、該信号により転換器46Aまたは46Bに導
入する空気とイオウ酸化物含有ガスとを切換える
ために、空気バルブ64,66およびバルブ6
8,70の開閉を行なうものである。具体的な制
御方法としては、例えば転換器46A内の温度が
ある設定値以下に低下した場合、バルブ68を閉
じ、イオウ酸化物含有ガスの導入を中止し、空気
バルブ64を開いて空気を導入し、半成コークス
を燃焼させて転換器46A内の温度を上昇させ
る。この時、転換器46Bでは、バルブ70が開
かれ、イオウ酸化物含有ガスが導入され、イオウ
への転換器反応が行なわれ、一方、空気バルブ6
6は閉じられる。転換器46B内の反応温度が設
定値より低下し、かつ転換器46A内の温度が設
定値以上に上昇した時点で、イオウ酸化物含有ガ
スのバルブ68を開、バルブ70を閉とし、一
方、空気バルブ64を閉、66を開とし、転換器
46Aではイオウへの転換反応を行ない、転換器
46Bでは半成コークスの燃焼による反応温度を
上昇させる。
The valve control panel 80 detects the temperature inside the converter and controls air valves 64, 66 and valve 6 to switch between air and sulfur oxide-containing gas introduced into the converter 46A or 46B based on the detected temperature.
8 and 70 are opened and closed. As a specific control method, for example, when the temperature inside the converter 46A falls below a certain set value, the valve 68 is closed to stop introducing the sulfur oxide-containing gas, and the air valve 64 is opened to introduce air. Then, the semi-formed coke is combusted to raise the temperature inside the converter 46A. At this time, in the converter 46B, the valve 70 is opened and the sulfur oxide-containing gas is introduced, and the converter reaction to sulfur takes place, while the air valve 6
6 is closed. When the reaction temperature in the converter 46B falls below the set value and the temperature in the converter 46A rises above the set value, the sulfur oxide-containing gas valve 68 is opened and the valve 70 is closed; The air valve 64 is closed and the air valve 66 is opened, the converter 46A performs a conversion reaction to sulfur, and the converter 46B raises the reaction temperature by combustion of the semi-formed coke.

第2図のフローシートを用いた具体的実施例を
以下に述べる。
A specific example using the flow sheet shown in FIG. 2 will be described below.

実施例 1 脱離器14からSO2を50VOL%含むガスを
6900Nm3/hの速度で転換器46Aに導入した。
導管72Aから供給される固体炭素質としては、
平均粒径5mmの太平洋炭を乾留して生成した半成
コークスを用いた。その供給量は3.4t/hであつ
た。転換器46A内の温度は、ガス導入開始時は
1000〜1100℃であつたが、前記の(1)および(2)式の
反応により徐々に低下し、3時間後には800℃ま
で低下し、この温度では反応速度が遅く、出口ガ
ス中の未反応SO2量が増加することが認められ
た。このため、バルブ制御盤の下限温度を800
℃、上限温度を1100℃に設定しておき、転換器4
6Aでは下限温度になつたときにバルブ68を閉
にしてSO2含有ガスの供給を停止し、バルブ64
を開にして空気を導入し、逆に上限温度に達した
ときにバルブ64を閉にして空気の供給を停止
し、バルブ68を開にしてSO2含有ガスを導入す
るように制御した。一方、転換器46Bでも同様
の操作を行なつたが、上記と逆に下限温度になつ
た時にバルブ70を開、バルブ66を閉にし、上
限温度に達した時にバルブ70を閉、バルブ68
を開になるように制御した。
Example 1 Gas containing 50VOL% of SO 2 is supplied from the desorber 14.
It was introduced into converter 46A at a rate of 6900 Nm 3 /h.
The solid carbon material supplied from the conduit 72A is as follows:
Semi-formed coke produced by carbonizing Pacific coal with an average particle size of 5 mm was used. The supply amount was 3.4t/h. The temperature inside the converter 46A at the start of gas introduction is
The temperature was 1000-1100℃, but it gradually decreased due to the reactions of equations (1) and (2) above, and after 3 hours it dropped to 800℃. It was observed that the amount of reacted SO 2 increased. For this reason, the lower limit temperature of the valve control panel was set to 800.
℃, upper limit temperature is set to 1100℃, converter 4
6A, when the lower limit temperature is reached, the valve 68 is closed to stop the supply of SO2- containing gas, and the valve 64 is closed.
Control was performed such that air was introduced by opening the valve, and conversely, when the upper limit temperature was reached, the valve 64 was closed to stop the supply of air, and the valve 68 was opened to introduce SO 2 -containing gas. On the other hand, the same operation was performed for the converter 46B, but in contrast to the above, when the lower limit temperature was reached, the valve 70 was opened and the valve 66 was closed, and when the upper limit temperature was reached, the valve 70 was closed, and the valve 68 was closed.
was controlled to be open.

その結果、導管50Aおよび50Bから排出さ
れるガス中には未反応のSO2はほとんど検出され
ず、転換器46Aおよび46B内では適正条件で
イオウの転換反応が行なわれていることが確認さ
れた。
As a result, almost no unreacted SO 2 was detected in the gas discharged from conduits 50A and 50B, confirming that the sulfur conversion reaction was occurring under appropriate conditions in converters 46A and 46B. .

なお、上記実施例では転換器内で石炭を乾留し
て製造した半成コークスを二酸化イオウの還元剤
として使用するため、転換器後段のタールによる
汚染を防止できる。
In the above embodiment, semi-formed coke produced by carbonizing coal in the converter is used as a reducing agent for sulfur dioxide, so it is possible to prevent tar contamination in the latter stage of the converter.

〔効果〕〔effect〕

以上、本発明によれば、SO2含有ガスをイオウ
に転換する転換器内の温度を検出し、その信号に
よつてSO2含有ガスと空気の導入を切換えるた
め、常に最適な温度でイオウの回収のための反応
を行うことができ、排ガス中の未反応SO2をほと
んどなくすことができる。その結果、イオウの回
収効率が向上する。
As described above, according to the present invention, the temperature inside the converter that converts SO 2 -containing gas to sulfur is detected, and the introduction of SO 2- containing gas and air is switched based on the signal. A reaction for recovery can be carried out, and unreacted SO 2 in the exhaust gas can be almost completely eliminated. As a result, sulfur recovery efficiency is improved.

また、従来の単基の転換器を有するイオウの回
収装置では、転換器内の温度を最適温度値に保持
しようとすると、酸素含有ガスが導入されている
間でSO2含有ガスの導入を停止しなければならな
いが、本発明では、少なくとも2基の転換器を使
用してイオウの転換反応と温度上昇を切換えて運
転することにより、温度調整のために脱離器から
のSO2含有ガスの供給を一時停止することなく、
安定した連続運転を行なうことができる。その結
果、一層イオウの回収効率が向上する。
In addition, in conventional sulfur recovery equipment that has a single converter, when attempting to maintain the temperature inside the converter at an optimal temperature value, the introduction of SO2- containing gas is stopped while oxygen-containing gas is introduced. However, in the present invention, at least two converters are used to switch between the sulfur conversion reaction and the temperature increase, thereby controlling the SO2 - containing gas from the desorber for temperature control. without suspending supply.
Stable continuous operation is possible. As a result, the sulfur recovery efficiency is further improved.

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

第1図は、排ガス脱硫におけるイオウ回収方法
のフローシート、第2図は、その転換器46の詳
細を示すフローシートである。 6……ボイラー、10……吸着器、14……脱
離器、24……乾留器、30……賦活器、46…
…転換器、46A,46B……転換器、64,6
6……空気バルブ、68,70……バルブ。
FIG. 1 is a flow sheet of a sulfur recovery method in exhaust gas desulfurization, and FIG. 2 is a flow sheet showing details of the converter 46. 6... Boiler, 10... Adsorber, 14... Desorber, 24... Carbonization device, 30... Activator, 46...
...Converter, 46A, 46B...Converter, 64,6
6...Air valve, 68,70...Valve.

Claims (1)

【特許請求の範囲】 1 炭素質吸着剤が備えられた吸着器と、該吸着
器にイオウ酸化物を含有するガスを供給するイオ
ウ酸化物含有ガス供給装置と、 当該イオウ酸化物を硫酸となし、該硫酸を吸着
した前記炭素質吸着剤を加熱することにより二酸
化イオウ含有ガスとして脱離させる脱離器と、 炭素質固体を備えてなり、当該炭素質固体と前
記脱離器から供給された二酸化イオウとを接触反
応させて、当該二酸化イオウを単体イオウに転換
する転換器と、 該転換器に酸素含有ガスを供給する酸素ガス供
給装置とを備えてなるイオウの回収装置におい
て、 前記転換器を複数個設けるとともに、 該各転換器内温度を検出する温度検出器と、 当該各転換器内の検出温度値を適正温度値に合
致させるように二酸化イオウ含有ガスと酸素含有
ガスとを選択的に該各転換器に供給するガス流路
制御装置とを備えてなり、複数の転換器の間で二
酸化イオウ含有ガスの導入と、酸素含有ガスの導
入とを交互に切換えて行なうことを特徴とするイ
オウの回収装置。 2 特許請求の範囲第1項において、前記炭素質
吸着剤および炭素質固体として、石炭を乾留して
得られた半成コークスを用いることを特徴とする
イオウの回収装置。
[Scope of Claims] 1. An adsorbent equipped with a carbonaceous adsorbent, a sulfur oxide-containing gas supply device for supplying a sulfur oxide-containing gas to the adsorbent, and the sulfur oxide being sulfuric acid. , a desorber for heating the carbonaceous adsorbent that has adsorbed the sulfuric acid to desorb it as a sulfur dioxide-containing gas; and a carbonaceous solid, the carbonaceous solid being supplied from the desorber with the carbonaceous solid. A sulfur recovery device comprising: a converter for converting the sulfur dioxide into elemental sulfur through a catalytic reaction with sulfur dioxide; and an oxygen gas supply device for supplying an oxygen-containing gas to the converter, the converter comprising: A temperature detector is provided to detect the temperature inside each converter, and a sulfur dioxide-containing gas and an oxygen-containing gas are selectively supplied so that the detected temperature value in each converter matches the appropriate temperature value. and a gas flow path control device for supplying gas to each of the converters, and is characterized in that the introduction of the sulfur dioxide-containing gas and the introduction of the oxygen-containing gas are alternately carried out between the plurality of converters. Sulfur recovery equipment. 2. The sulfur recovery device according to claim 1, wherein semi-formed coke obtained by carbonizing coal is used as the carbonaceous adsorbent and the carbonaceous solid.
JP5916179A 1979-05-16 1979-05-16 Recovery of sulfur Granted JPS55154308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5916179A JPS55154308A (en) 1979-05-16 1979-05-16 Recovery of sulfur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5916179A JPS55154308A (en) 1979-05-16 1979-05-16 Recovery of sulfur

Publications (2)

Publication Number Publication Date
JPS55154308A JPS55154308A (en) 1980-12-01
JPS623081B2 true JPS623081B2 (en) 1987-01-23

Family

ID=13105361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5916179A Granted JPS55154308A (en) 1979-05-16 1979-05-16 Recovery of sulfur

Country Status (1)

Country Link
JP (1) JPS55154308A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4459275A (en) * 1981-07-01 1984-07-10 Sumitomo Heavy Industries, Ltd. Process for production of sulfur from SO2 -containing gas

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2373326A1 (en) * 1976-12-13 1978-07-07 Allied Chem Conversion of sulphur di:oxide to sulphur in waste gas - where gas is fed continuously through heated fluidised bed of coal
JPS5595604A (en) * 1979-01-17 1980-07-21 Sumitomo Heavy Ind Ltd Reducing method for sulfur dioxide with coal
JPS55104905A (en) * 1979-02-02 1980-08-11 Sumitomo Heavy Ind Ltd Reducing method for sulfur dioxide with coal
JPS5858131B2 (en) * 1979-03-23 1983-12-23 株式会社日立製作所 Flue gas desulfurization method and its equipment

Also Published As

Publication number Publication date
JPS55154308A (en) 1980-12-01

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