JPS6287228A - Dry stack gas desulfurization process - Google Patents
Dry stack gas desulfurization processInfo
- Publication number
- JPS6287228A JPS6287228A JP60227798A JP22779885A JPS6287228A JP S6287228 A JPS6287228 A JP S6287228A JP 60227798 A JP60227798 A JP 60227798A JP 22779885 A JP22779885 A JP 22779885A JP S6287228 A JPS6287228 A JP S6287228A
- Authority
- JP
- Japan
- Prior art keywords
- tower
- water
- washing
- gas
- recovery system
- 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.)
- Granted
Links
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Treating Waste Gases (AREA)
Abstract
Description
【発明の詳細な説明】
（関連技術分野）
この発明は乾式排煙脱硫プロセスの改良に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION (Related Technical Field) This invention relates to improvements in dry flue gas desulfurization processes.
（従来技術）
従来は、乾式脱硫プロセスに於ける脱離塔出口には、サ
イクロン集塵器の様な簡単な集塵塔しか設置されていな
かった。このため塩安（Ｎｌ１４Ｃｆｌ ）、硫安（（
ＮＨ，）ｚ ｓｏ、 ）などの不純物はそのまま通過し
、次の硫黄回収系へ流入されるという状態であった。(Prior Art) Conventionally, only a simple dust collector such as a cyclone dust collector was installed at the outlet of a desorption tower in a dry desulfurization process. For this reason, ammonium chloride (Nl14Cfl), ammonium sulfate ((
Impurities such as NH, )z so, ) passed through as they were and were flowed into the next sulfur recovery system.
（発明の解決しようと、する問題点）
従来型乾式脱硫装置では、乾式脱硫プロセスにおける硫
黄回収系の硫黄コンデンサー、スクラバーがＮＩ＋、（
ｌや（ＮＨ４）２５０４或いは活性戻粉等によって閉塞
したり、回収硫黄内へ上記物質が混入し、回収硫黄の純
度を落すという問題があったが１本発明はこのような問
題を解決しようとするものである。(Problems to be solved by the invention) In the conventional dry desulfurization equipment, the sulfur condenser and scrubber of the sulfur recovery system in the dry desulfurization process are NI+, (
There have been problems such as clogging by l, (NH4) 2504, activated return powder, etc., and the above substances are mixed into the recovered sulfur, reducing the purity of the recovered sulfur.1 The present invention aims to solve these problems. It is something to do.
（発明の解決手段）
脱離塔と硫黄回収系との間に水スプレーとこれに続く充
填塔よりなる洗浄塔を設置し、この洗浄塔で脱離ガス中
の不純物を除去したのち硫黄回収系に送るようにし、か
つ洗浄塔パージ水を吸着塔入口及び出口煙道に導き、こ
れを蒸発させて再利用できるようにし、排水処理の必要
性をなくしたことを特徴とする。(Solution Means of the Invention) A cleaning tower consisting of a water spray and a subsequent packed tower is installed between the desorption tower and the sulfur recovery system, and after removing impurities in the desorption gas with this cleaning tower, the sulfur recovery system In addition, the cleaning tower purge water is introduced to the adsorption tower inlet and outlet flue to be evaporated and reused, thereby eliminating the need for wastewater treatment.
（実施例）
１はボイラーで、該ボイラーの排煙は吸着塔２を経て煙
突３から大気中に排出される。(Example) Reference numeral 1 denotes a boiler, and exhaust smoke from the boiler passes through an adsorption tower 2 and is discharged into the atmosphere from a chimney 3.
４は脱離塔で、この脱離塔４を出た脱離ガスはＮＨ４Ｃ
Ｑ、（ＮＨ４）２ＳＯ４、ＨＦを１，０００〜ｌＯ，Ｏ
ＯＯｐｐｍ程度含んでいる。又この他に活性戻粉を１〜
３ ｇ ／Ｎｍ’程度含んでいる。脱離ガスはダクト５
を経て、洗浄塔６でまず水スプレー６ａと接触し、ＮＨ
２ＯＱ、（Ｎｌ＋４）２ＳｏいＨＦ等が洗浄されてこれ
ら物質の含有率がＯ〜１０ｐｐｍまで低減される。又含
有されているＳＯ□はほとんど水に溶けないため、その
まま純度の高いＳ０２リツチガスとして充填塔６ｂを経
て後段の硫黄回収系７に送られる。4 is a desorption tower, and the desorption gas leaving this desorption tower 4 is NH4C.
Q, (NH4)2SO4, HF from 1,000 to 1O,O
Contains about OOppm. In addition to this, add 1 or more activated rehydrated powder.
Contains about 3 g/Nm'. Desorption gas is in duct 5
In the washing tower 6, it first comes into contact with water spray 6a, and the NH
2OQ, (Nl+4)2So, HF, etc. are washed and the content of these substances is reduced to 0 to 10 ppm. Also, since the SO□ contained therein is hardly soluble in water, it is directly sent to the subsequent sulfur recovery system 7 through the packed tower 6b as a highly pure SO2 rich gas.
洗浄塔６の前段では水スプレー６ａに直接脱離ガスが接
触するので、ガス温度も下げ、後段のラシヒリング等が
充填されている充填塔６ｂ内で気液接触して完全にＮＨ
４ＣＱ、（ＮＨ４）２８０４等が除去される。In the first stage of the cleaning tower 6, the desorbed gas comes into direct contact with the water spray 6a, so the gas temperature is also lowered, and in the latter stage packed tower 6b filled with Raschig rings, etc., gas-liquid contact occurs and the NH is completely removed.
4CQ, (NH4)2804, etc. are removed.
又脱離ガス中には３０〜４０％の１１２０が含まれてい
るが、充填塔６ｂで凝縮除去される。かくして充填塔の
出口では、約７０〜８０℃のガス温度となっている。The desorbed gas contains 30 to 40% of 1120, which is condensed and removed in the packed column 6b. Thus, at the outlet of the packed column, the gas temperature is approximately 70-80°C.
充填塔６ｂにて精製されたＳＯ□リッチの脱離ガスは硫
黄回収系７に送られ、高純度の硫黄として回収される。The SO□-rich desorption gas purified in the packed column 6b is sent to the sulfur recovery system 7, where it is recovered as high-purity sulfur.
残ったテールガスは焼却炉８で焼却される。The remaining tail gas is incinerated in an incinerator 8.
洗浄塔６ではポンプ１０によって洗浄水が循環されるが
、洗浄水槽９内のＰＨ値等の増加によって適時補給水が
注入されるようになっている。In the washing tower 6, washing water is circulated by a pump 10, and make-up water is injected at appropriate times depending on the increase in the pH value in the washing water tank 9.
さて、洗浄塔６で洗われた脱離ガスはそのま＼硫黄回収
系に移行する。洗浄塔からの排水中に溶解したこれらの
不純物は洗浄水槽９から適時パージ水と共に排出される
が、このパージ水を吸着塔入口煙道又は出口煙道にダク
ト１１を介し導かれたのち、噴霧化され再利用される。Now, the desorbed gas washed in the washing tower 6 is directly transferred to the sulfur recovery system. These impurities dissolved in the waste water from the washing tower are discharged from the washing water tank 9 together with purge water at a suitable time, but this purge water is led to the adsorption tower inlet flue or outlet flue through the duct 11 and then sprayed. be recycled and reused.
（効果）
（１）従来、乾式脱硫プロセスに於ては不純物（Ｎｌ（
４ＣＱ、（ＮＨ４）ｚｓｏいＨＦ、 Ｈ（１，Ｎｉ＋、
等）を含んだＳＯ２リッチ脱離ガスがそのまま硫黄回収
系に送られ、硫黄コンデンサー、スクラバー等の閉塞や
腐蝕等の種々のトラブルの原因となっていた。(Effects) (1) Conventionally, in the dry desulfurization process, impurities (Nl(
4CQ, (NH4)zsoHF, H(1,Ni+,
The SO2-rich desorption gas containing sulfur condensers, scrubbers, etc.) was sent as is to the sulfur recovery system, causing various problems such as clogging and corrosion of sulfur condensers, scrubbers, etc.
これに対し、本発明の如く、脱離塔と硫黄回収系との間
に洗浄塔を設ることにより、コンデンサー、スクラバー
等の閉塞がなくなり、硫黄回収系の安全運転が可能とな
った。又不純物とともに活性戻粉などのダストも洗浄塔
で除去するので、純度の高い硫黄が硫黄回収系で回収で
きる。In contrast, by providing a cleaning tower between the desorption tower and the sulfur recovery system as in the present invention, clogging of the condenser, scrubber, etc. is eliminated, and safe operation of the sulfur recovery system is possible. In addition, since dust such as activated return powder is removed along with impurities in the cleaning tower, highly pure sulfur can be recovered in the sulfur recovery system.
（２）洗浄水排水を吸着塔入口煙道又は出口煙道で噴霧
気化させるので、排水処理設備を要しない。(2) Since the washing water wastewater is atomized and vaporized in the adsorption tower inlet flue or outlet flue, no wastewater treatment equipment is required.
洗浄水排水を吸着塔入口にもどした場合、ＮＨ，蒸気が
この蒸気中に存在している為、アンモニアの使用量が低
減でき、脱硫、脱硝効率をあげることができる。かつま
た、温度が低下し水分が増加するので、脱硫効率を一段
と上昇させることができる。When the wash water waste water is returned to the adsorption tower inlet, NH and steam are present in this steam, so the amount of ammonia used can be reduced and the desulfurization and denitrification efficiency can be increased. Furthermore, since the temperature decreases and the moisture content increases, the desulfurization efficiency can be further increased.
図は本発明に係る排煙脱硫プロセスを示す図。
図において；
１ ボイラー ２ 吸着塔
３ 煙突 ４ 脱離塔
５ ダクト ６ 洗浄塔
６ａ 水スプレー ６ｂ 充填塔７ 硫黄回収
系
８ （テールガスの）焼却炉
９ 洗浄水槽 １０ ポンプ
１１ ダクト
以上The figure shows a flue gas desulfurization process according to the present invention. In the figure: 1 Boiler 2 Adsorption tower 3 Chimney 4 Desorption tower 5 Duct 6 Washing tower 6a Water spray 6b Packed tower 7 Sulfur recovery system 8 (Tail gas) Incinerator 9 Washing water tank 10 Pump 11 Duct and above
Claims (1)
填塔よりなる洗浄塔を設置し、該洗浄塔で脱離ガス中の
不純物を除去したのち硫黄回収系に送るように、かつ洗
浄塔パージ水を吸着塔入口及び出口煙道に導きこれを蒸
発させ、該蒸気を排煙脱硫装置にて再利用可能にしたこ
とを特徴とする乾式排煙脱硫プロセス。A cleaning tower consisting of a water spray and a packed tower is installed between the desorption tower and the sulfur recovery system, and the cleaning tower removes impurities in the desorption gas before sending it to the sulfur recovery system, and A dry flue gas desulfurization process characterized in that cleaning tower purge water is introduced into an adsorption tower inlet and outlet flue to evaporate it, and the vapor can be reused in a flue gas desulfurization device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60227798A JPS6287228A (en) | 1985-10-15 | 1985-10-15 | Dry stack gas desulfurization process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60227798A JPS6287228A (en) | 1985-10-15 | 1985-10-15 | Dry stack gas desulfurization process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6287228A true JPS6287228A (en) | 1987-04-21 |
| JPH0229368B2 JPH0229368B2 (en) | 1990-06-29 |
Family
ID=16866554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60227798A Granted JPS6287228A (en) | 1985-10-15 | 1985-10-15 | Dry stack gas desulfurization process |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6287228A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009047290A (en) * | 2007-08-23 | 2009-03-05 | Miwa Tec:Kk | Omnidirectional vibration damper |
| CN103047660A (en) * | 2013-01-14 | 2013-04-17 | 无锡市沈能节能设备有限公司 | Yellow phosphorus tail gas recycling system |
-
1985
- 1985-10-15 JP JP60227798A patent/JPS6287228A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009047290A (en) * | 2007-08-23 | 2009-03-05 | Miwa Tec:Kk | Omnidirectional vibration damper |
| CN103047660A (en) * | 2013-01-14 | 2013-04-17 | 无锡市沈能节能设备有限公司 | Yellow phosphorus tail gas recycling system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0229368B2 (en) | 1990-06-29 |
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