JPH1121565A - Process for removing tar from combustible gas - Google Patents

Process for removing tar from combustible gas

Info

Publication number
JPH1121565A
JPH1121565A JP9174743A JP17474397A JPH1121565A JP H1121565 A JPH1121565 A JP H1121565A JP 9174743 A JP9174743 A JP 9174743A JP 17474397 A JP17474397 A JP 17474397A JP H1121565 A JPH1121565 A JP H1121565A
Authority
JP
Japan
Prior art keywords
gas
combustible gas
tar
gasifier
waste
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9174743A
Other languages
Japanese (ja)
Inventor
Teruo Oshiro
照男 大城
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.)
N K K PLANT KENSETSU KK
NKK Plant Engineering Corp
Original Assignee
N K K PLANT KENSETSU KK
NKK Plant Engineering Corp
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 N K K PLANT KENSETSU KK, NKK Plant Engineering Corp filed Critical N K K PLANT KENSETSU KK
Priority to JP9174743A priority Critical patent/JPH1121565A/en
Publication of JPH1121565A publication Critical patent/JPH1121565A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Landscapes

  • Industrial Gases (AREA)

Abstract

PROBLEM TO BE SOLVED: To efficiently remove the tar from a combustible gas formed when wastes are gasified in a fluidized-bed gasifier to thereby make the combustible gas fully utilizable. SOLUTION: A combustible gas formed when wastes are gasified in a gasifier 2 is passed through a waste heat boiler 4 to recover the heat, cooled in a wet- type scrubber 5 to remove the tar contained therein. Next, this gas is passed through an electrostatic precipitator to perfectly remove the tar from the gas, and the gas is stored in a gas holder and is fully utilized.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、会社、工場、一
般家庭等、各方面から排出された有機系物質からなる廃
棄物のガス化処理に際し、生成した可燃性ガス中に含有
されているタールを除去し、可燃性ガスを有効に利用す
る方法に関するものである。
BACKGROUND OF THE INVENTION The present invention relates to tar contained in combustible gas generated in the gasification of organic wastes discharged from various fields, such as companies, factories, and general households. And a method for effectively using combustible gas.

【0002】[0002]

【従来の技術】会社、工場、一般家庭等から排出された
有機系物質からなる廃棄物の処理手段の1つとして、こ
れら廃棄物を流動層方式のガス化炉においてガス化し、
生成した可燃性ガスを燃料等に有効利用することが行わ
れている。
2. Description of the Related Art As one of means for treating organic wastes discharged from companies, factories, ordinary households, etc., these wastes are gasified in a fluidized-bed gasifier.
The generated combustible gas is effectively used as fuel or the like.

【0003】このようなガス化炉での廃棄物のガス化処
理に際し、生成した可燃性ガスは、タールおよびCl、
S等を含有している。そのために、上記可燃性ガスを排
熱ボイラーや熱交換器等に通し熱回収する際に、タール
分が熱回収機器に析出して付着するために、熱回収効率
を低下させ、場合によっては、熱回収が不可能になる問
題があった。
[0003] In the gasification treatment of wastes in such a gasification furnace, the combustible gas generated includes tar and Cl,
Contains S and the like. Therefore, when the combustible gas is passed through a waste heat boiler, a heat exchanger, or the like to recover heat, tar components precipitate and adhere to the heat recovery device, thereby lowering the heat recovery efficiency. There was a problem that heat recovery became impossible.

【0004】[0004]

【発明が解決しようとする課題】そのために、従来は、
ガス化炉から生成した可燃性ガスを、湿式スクラバーに
おいて大量の洗浄液と接触させて、これを冷却すると共
に、ガス中のタール分およびCl、S等を除去してい
た。そのために、高温の可燃性ガスの熱回収を行うこと
ができず、顕熱損失が大であり、更に、湿式スクラバー
による除去方法では、タールの除去効率が悪く、全体の
約60%位しか除去することができない。従って、その
後の工程における各種機器へのタールの付着およびそれ
に伴って生ずる問題を解決するには至っていない。
Therefore, conventionally,
A combustible gas generated from a gasification furnace was brought into contact with a large amount of a cleaning liquid in a wet scrubber to cool the same and to remove tar components, Cl, S, etc. in the gas. Therefore, heat recovery of high-temperature flammable gas cannot be performed, and sensible heat loss is large. Furthermore, in the removal method using a wet scrubber, tar removal efficiency is poor, and only about 60% of the total is removed. Can not do it. Therefore, it has not been possible to solve the problem of tar adhering to various devices in the subsequent steps and the problems caused thereby.

【0005】石炭ガス化炉で発生するガス中のタール分
を除去する方法として、特開平2−55789号公報等
には、石炭ガス化炉の発生ガスを、触媒を内蔵したター
ル分解装置によって除去する方法(以下、先行技術とい
う)が開示されている。
[0005] As a method for removing tar components in gas generated in a coal gasifier, Japanese Unexamined Patent Publication No. 2-55789 discloses a method in which a gas generated in a coal gasifier is removed by a tar cracking device having a built-in catalyst. (Hereinafter referred to as prior art) is disclosed.

【0006】しかしながら、先行技術は、石炭ガス化炉
で発生するガスを対象としているので、タール分は分解
し得ても、廃棄物をガス化処理する場合に問題となる、
生成ガス中に存在する触媒毒としてのClやSを除去す
ることができず、これらClやSのためにタール分解装
置において触媒が劣化する結果、タール分の分解が行い
得なくなる問題がある。従って、先行技術のような方法
を、廃棄物のガス化処理に適用することはできない。
[0006] However, since the prior art is directed to gas generated in a coal gasifier, even if the tar component can be decomposed, it becomes a problem when gasifying waste.
It is not possible to remove Cl and S as catalyst poisons present in the generated gas, and the Cl and S degrade the catalyst in the tar decomposer. As a result, there is a problem in that tar cannot be decomposed. Therefore, methods such as the prior art cannot be applied to gasification of waste.

【0007】この発明は、上述した問題を解決し、廃棄
物を流動層方式のガス化炉においてガス化処理するに際
し、生成した可燃性ガス中に含有されているタールを効
率的に除去し、可燃性ガスを有効利用すると共にその有
する顕熱を回収することができる方法を提供することに
ある。
[0007] The present invention solves the above-mentioned problems, and efficiently removes tar contained in the combustible gas generated when gasifying waste in a fluidized-bed gasifier. An object of the present invention is to provide a method capable of effectively using a combustible gas and recovering the sensible heat of the combustible gas.

【0008】[0008]

【課題を解決するための手段】この発明の方法は、廃棄
物を流動層方式のガス化炉においてガス化し、生成した
可燃性ガスを得るに際し、前記ガス化炉において生成し
た可燃性ガスを廃熱ボイラに導き、廃熱ボイラにおいて
顕熱を回収し、次いで、前記熱回収された可燃性ガスを
湿式スクラバーに導き、湿式スクラバーにおいて、前記
可燃性ガスを冷却し60℃以下にすると共に、ガス中に
含有されているタールを除去し、次いで、前記60℃以
下に冷却された可燃性ガスを電気集塵機に導き、電気集
塵機においてガス中に含有されているタールを完全に除
去し、このようにしてタールが完全に除去された可燃性
ガスをガスホルダーに貯蔵し、有効に利用することに特
徴を有するものである。
According to the method of the present invention, waste gas is gasified in a fluidized-bed type gasifier and the combustible gas generated in the gasifier is used to obtain the combustible gas. Guided to a hot boiler, recovers sensible heat in a waste heat boiler, and then guides the heat recovered flammable gas to a wet scrubber, where the flammable gas is cooled down to 60 ° C. The tar contained therein is removed, and then the combustible gas cooled to 60 ° C. or lower is led to an electric precipitator, and the tar contained in the gas is completely removed in the electric precipitator. This is characterized in that the combustible gas from which tar has been completely removed is stored in a gas holder and used effectively.

【0009】[0009]

【発明の実施の形態】次に、この発明を図面を参照しな
がら説明する。図1はこの発明の方法の一実施態様を示
す概略工程図である。図面に示すように、廃棄物を収容
する原料ホッパ1に近接して流動層方式のガス化炉2が
設けられており、原料ホッパ1からガス化炉2内に供給
された廃棄物は、ガス化炉2内においてその下部からブ
ロワ8により吹き込まれる高温空気によって流動化し、
700〜800℃の温度でガス化される。
Next, the present invention will be described with reference to the drawings. FIG. 1 is a schematic process diagram showing one embodiment of the method of the present invention. As shown in the drawing, a fluidized-bed gasification furnace 2 is provided adjacent to a raw material hopper 1 for containing waste, and the waste supplied from the raw material hopper 1 into the gasification furnace 2 is gaseous. Fluidized by high-temperature air blown from below by a blower 8 in the gasifier 2,
It is gasified at a temperature of 700-800C.

【0010】ガス化炉2に続いて、サイクロン3、廃熱
ボイラ4、湿式スクラバー5および電気集塵機6が設け
られており、ガス化炉2において生成した可燃性ガス
は、サイクロン3においてガス中のダストが除去された
上、廃熱ボイラ4において熱回収される。
[0010] Subsequent to the gasifier 2, a cyclone 3, a waste heat boiler 4, a wet scrubber 5, and an electric precipitator 6 are provided. After the dust is removed, heat is recovered in the waste heat boiler 4.

【0011】次いで、可燃性ガスを湿式スクラバー5に
導き、湿式スクラバー5において大量の洗浄液と接触さ
せることにより、60℃以下の温度まで冷却すると共
に、ガス中に含有されているタール分を約60%まで除
去し、同時にガス中に含有されているCl、S等も除去
する。
Next, the combustible gas is guided to the wet scrubber 5 and brought into contact with a large amount of cleaning liquid in the wet scrubber 5 to cool the mixture to a temperature of 60 ° C. or less and to reduce the amount of tar contained in the gas to about 60 ° C. %, And at the same time, Cl, S, etc. contained in the gas are also removed.

【0012】このようにしてタール分およびCl、S等
が除去されたガスを電気集塵機6に導き、電気集塵機6
において、ガス中に残存するタールを完全に除去する。
除去されたタールはタール受槽7に受け入れ、油水分離
後、再利用される。
The gas from which the tar content and Cl, S, etc. have been removed in this way is led to the electric precipitator 6 and the electric precipitator 6
In the above, tar remaining in the gas is completely removed.
The removed tar is received in the tar receiving tank 7 and is reused after oil-water separation.

【0013】タールが完全に除去された可燃性ガスは、
ガスホルダー9に貯蔵され、各種用途に利用される。上
述したように、この発明によれば、廃棄物を流動層方式
のガス化炉2においてガス化し生成した可燃性ガスは、
湿式スクラバー5において大量の洗浄液と接触しタール
分が約60%まで除去され、次いで、水分が飽和状態に
なった可燃性ガスは、電気集塵機6において電気集塵さ
れる。従って、電気集塵時に多量の凝縮水が、ガス中の
タールと会合する結果、タールの除去効率が極めて高く
なり、且つ、ガス中の水分も効率的に除去される。
The combustible gas from which tar has been completely removed is
It is stored in the gas holder 9 and used for various purposes. As described above, according to the present invention, the combustible gas generated by gasifying waste in the fluidized bed gasifier 2 is
The wet scrubber 5 comes into contact with a large amount of cleaning liquid to remove the tar content up to about 60%. Then, the combustible gas whose water content is saturated is collected by the electric precipitator 6. Accordingly, a large amount of condensed water is associated with tar in the gas during the electrostatic precipitating, so that the tar removal efficiency is extremely high and the moisture in the gas is also efficiently removed.

【0014】[0014]

【実施例】次に、この発明を実施例により説明する。容
量15Nm3/H の流動層方式のガス化炉2に有機物系の廃
棄物を供給し、その下部から常温の空気を吹込み、廃棄
物を流動化ガス化した。
Next, the present invention will be described with reference to embodiments. Organic waste was supplied to a gasification furnace 2 of a fluidized bed system having a capacity of 15 Nm 3 / H, and air at room temperature was blown from the lower part thereof to fluidize and gasify the waste.

【0015】ガス化炉において生成した約700〜80
0℃の温度の可燃性ガスを、サイクロン3に導きダスト
を除去した後、廃熱ボイラ4において熱回収した。廃熱
ボイラ4において熱回収された約150℃のガスは、湿
式スクラバー5において約60℃に冷却された後、電気
集塵機6において電気集塵され、残りのタールを完全に
除去した。
Approximately 700 to 80 produced in the gasifier
The combustible gas at a temperature of 0 ° C. was led to the cyclone 3 to remove dust, and then heat was recovered in the waste heat boiler 4. The gas of about 150 ° C. recovered by heat in the waste heat boiler 4 was cooled to about 60 ° C. in the wet scrubber 5 and then was electrically collected in the electric precipitator 6 to completely remove the remaining tar.

【0016】上記湿式スクラバー5および電気集塵機6
の入側および出側における可燃性ガス中のタール量は、
次の通りである。 湿式スクラバー入側:10.38g/Nm3 湿式スクラバー出側: 6.21g/Nm3 (タール除去効
率40.2%) 電気集塵機出側 : 0 g/Nm3 (タール除去効
率100%) その結果、廃熱ボイラ4等において、タールの付着が生
ずることはなく、効率的に熱交換が行われ、ガスの有す
る顕熱を有効に回収することができた。
The wet scrubber 5 and the electric dust collector 6
The amount of tar in the flammable gas at the entrance and exit of the
It is as follows. Wet scrubber inlet: 10.38 g / Nm 3 Wet scrubber outlet: 6.21 g / Nm 3 (tar removal efficiency 40.2%) Electric dust collector outlet: 0 g / Nm 3 (tar removal efficiency 100%) In the waste heat boiler 4 and the like, no tar was attached, heat was efficiently exchanged, and the sensible heat of the gas could be effectively recovered.

【0017】[0017]

【発明の効果】以上述べたように、この発明によれば、
廃棄物を流動層方式のガス化炉においてガス化するに際
し、生成した可燃性ガス中に含有されているタールを効
率的に除去し、可燃性ガスを有効に利用すると共にその
有する顕熱を回収することができる等、多くの工業上優
れた効果がもたらされる。
As described above, according to the present invention,
When gasifying waste in a fluidized bed gasifier, the tar contained in the combustible gas generated is efficiently removed, the combustible gas is effectively used, and the sensible heat of the gas is recovered. And many other industrially superior effects.

【図面の簡単な説明】[Brief description of the drawings]

【図1】この発明の方法の概略工程図である。FIG. 1 is a schematic process diagram of the method of the present invention.

【符号の説明】[Explanation of symbols]

1 原料ホッパ 2 ガス化炉 3 サイクロン 4 廃熱ボイラ 5 湿式スクラバー 6 電気集塵器 7 タール受槽 8 ブロワ 9 ガスホルダー DESCRIPTION OF SYMBOLS 1 Raw material hopper 2 Gasifier 3 Cyclone 4 Waste heat boiler 5 Wet scrubber 6 Electric dust collector 7 Tar receiving tank 8 Blower 9 Gas holder

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 廃棄物を流動層方式のガス化炉において
ガス化し、生成した可燃性ガスを得るに際し、前記ガス
化炉において生成した可燃性ガスを廃熱ボイラに導き、
廃熱ボイラにおいて顕熱回収し、 次いで、前記熱回収された可燃性ガスを湿式スクラバー
に導き、湿式スクラバーにおいて、前記可燃性ガスを冷
却し60℃以下の温度にすると共に、ガス中に含有され
ているタールを除去し、次いで、前記60℃以下に冷却
された可燃性ガスを電気集塵機に導き、電気集塵機にお
いてガス中に含有されているタールを完全に除去し、こ
のようにしてタールが完全に除去された可燃性ガスをガ
スホルダーに貯蔵し有効に利用することを特徴とする、
可燃性ガス中のタール除去方法。
When the waste is gasified in a fluidized-bed gasifier and the generated combustible gas is obtained, the combustible gas generated in the gasifier is guided to a waste heat boiler.
Sensible heat recovery in a waste heat boiler, and then conducting the heat-recovered combustible gas to a wet scrubber, in which the combustible gas is cooled to a temperature of 60 ° C. or less and contained in the gas. Then, the combustible gas cooled to a temperature of 60 ° C. or lower is guided to an electric precipitator, and tar contained in the gas is completely removed in the electric precipitator. Characterized by storing the combustible gas removed in the gas holder and using it effectively,
Method for removing tar in combustible gas.
JP9174743A 1997-06-30 1997-06-30 Process for removing tar from combustible gas Pending JPH1121565A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9174743A JPH1121565A (en) 1997-06-30 1997-06-30 Process for removing tar from combustible gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9174743A JPH1121565A (en) 1997-06-30 1997-06-30 Process for removing tar from combustible gas

Publications (1)

Publication Number Publication Date
JPH1121565A true JPH1121565A (en) 1999-01-26

Family

ID=15983911

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9174743A Pending JPH1121565A (en) 1997-06-30 1997-06-30 Process for removing tar from combustible gas

Country Status (1)

Country Link
JP (1) JPH1121565A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102585916A (en) * 2011-12-29 2012-07-18 武汉凯迪工程技术研究总院有限公司 Biomass synthesized gas negative pressure purifying process method and system configuration for producing oil
CN102604685A (en) * 2011-12-29 2012-07-25 武汉凯迪工程技术研究总院有限公司 Biomass synthesis gas positive pressure purification process and system configuration for oil production
AU2012362087B2 (en) * 2011-12-29 2016-08-25 Wuhan Kaidi General Research Institute Of Engineering & Technology Co., Ltd. Process for cooling and washing biomass syngas and system thereof
WO2021193573A1 (en) * 2020-03-24 2021-09-30 積水化学工業株式会社 Pyrolysis gas purification/cooling device, pyrolysis gas purification/cooling method, organic substance production device, and method for producing organic substance

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102585916A (en) * 2011-12-29 2012-07-18 武汉凯迪工程技术研究总院有限公司 Biomass synthesized gas negative pressure purifying process method and system configuration for producing oil
CN102604685A (en) * 2011-12-29 2012-07-25 武汉凯迪工程技术研究总院有限公司 Biomass synthesis gas positive pressure purification process and system configuration for oil production
EP2799525A1 (en) * 2011-12-29 2014-11-05 Wuhan Kaidi Engineering Technology Research Institute Co., Ltd. Biomass syngas purification process under negative pressure for producing oil and system configuration thereof
US20150041719A1 (en) * 2011-12-29 2015-02-12 Wuhan Kaidi General Research Institute Of Engineering & Technology Co., Ltd. Method of purification of biomass syngas under positive pressure
US20150041720A1 (en) * 2011-12-29 2015-02-12 Wuhan Kaidi General Research Institute Of Engineering & Technology Co., Ltd. Method of purification of biomass syngas under negative pressure
EP2799525A4 (en) * 2011-12-29 2015-09-30 Wuhan Kaidi Eng Tech Res Inst Biomass syngas purification process under negative pressure for producing oil and system configuration thereof
US9309115B2 (en) * 2011-12-29 2016-04-12 Wuhan Kaidi General Research Institute Of Engineering & Technology Co., Ltd. Method of purification of biomass syngas under positive pressure
US9409775B2 (en) * 2011-12-29 2016-08-09 Wuhan Kaidi Engineering Technology Research Institute Co., Ltd. Method of purification of biomass syngas under negative pressure
AU2012362087B2 (en) * 2011-12-29 2016-08-25 Wuhan Kaidi General Research Institute Of Engineering & Technology Co., Ltd. Process for cooling and washing biomass syngas and system thereof
WO2021193573A1 (en) * 2020-03-24 2021-09-30 積水化学工業株式会社 Pyrolysis gas purification/cooling device, pyrolysis gas purification/cooling method, organic substance production device, and method for producing organic substance
CN115335493A (en) * 2020-03-24 2022-11-11 积水化学工业株式会社 Apparatus and method for purifying and cooling pyrolysis gas, apparatus for producing organic substance, and method for producing organic substance

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