JPS6287226A - Dry stack gas desulfurization method - Google Patents
Dry stack gas desulfurization methodInfo
- Publication number
- JPS6287226A JPS6287226A JP60227796A JP22779685A JPS6287226A JP S6287226 A JPS6287226 A JP S6287226A JP 60227796 A JP60227796 A JP 60227796A JP 22779685 A JP22779685 A JP 22779685A JP S6287226 A JPS6287226 A JP S6287226A
- Authority
- JP
- Japan
- Prior art keywords
- tower
- recovery system
- gas
- sulfur
- sulfur recovery
- 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
Landscapes
- Treating Waste Gases (AREA)
Abstract
Description
【発明の詳細な説明】 （関連技術分野） 本発明は乾式排煙脱硫方法の改良に関するものである。[Detailed description of the invention] (Related technical field) The present invention relates to an improvement in a dry flue gas desulfurization method.
（従来技術）
従来は、脱離塔出口には、サイクロン集塵器の様な簡単
でしかもダストのみしか除去できない集塵器が設置され
ていた。しかもこれはダスト捕集効率が悪く、塩安（Ｎ
１１４ＣＱ ）、硫安＜ （ＮＨ，）２ Ｓ０４ ）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, a simple dust collector such as a cyclone dust collector that can only remove dust has been installed at the exit of the desorption tower. Moreover, this method has poor dust collection efficiency and
114CQ) and ammonium sulfate < (NH,)2S04) 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ＮＨ４ＣＱ
や（Ｎ）＋４ ）２Ｓ０４或いは活性炭粉等によって閉
塞したり、回収硫黄内へ上記物質が混入し。(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 contain NH4CQ.
or (N)+4) 2S04 or activated carbon powder, or the above substances are mixed into the recovered sulfur.
回収硫黄の純度を落すという問題があったが、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。There has been a problem of lowering the purity of recovered sulfur, but the present invention attempts to solve this problem.
（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 The feature is that it is sent to
（実施例）
１は脱離塔で、この脱離塔１を出た脱離ガスはＮｉ１４
（１、（ＮＨ，）２５０．、 ＨＦを１，０００−１．
０．ＯＯＯｐｐｍ程度含んでいる。又この他に活性炭粉
を１〜３ ｇ ／Ｎ、３程度含んでいる。脱離ガスはダ
クト２を経て、洗浄塔３でまず水スプレー３ａと接触し
、Ｎｔ（４ＣＱ、（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ＳＯ，リッチガスとして充填塔
３ｂを経て後段の硫黄回収系４に送られる。(Example) 1 is a desorption tower, and the desorption gas leaving this desorption tower 1 is Ni14
(1, (NH,)250., HF 1,000-1.
0. Contains about OOppm. In addition to this, it also contains activated carbon powder at a rate of 1 to 3 g/N. The desorbed gas passes through the duct 2 and first comes into contact with the water spray 3a in the cleaning tower 3, where Nt(4CQ, (Nl+4)2SO, HF, etc.) are washed away 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 4 via the packed column 3b as highly pure SO and rich gas.
洗浄塔３の前段では水スプレー３ａ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３ｂ内で気液接触して完全にＮＨ
４（１、（ＮＨ４）２Ｓｏ４等が除去される。In the first stage of the cleaning tower 3, the desorbed gas comes into direct contact with the water spray 3a, so the gas temperature is also lowered, and in the latter stage packed tower 3b filled with Raschig rings, etc., gas-liquid contact occurs and the NH is completely removed.
4(1, (NH4)2So4, etc.) are removed.
又脱離ガス中には３０〜４０％の１１２０が含まｊｌて
いるが、充填塔３ｂで凝縮除去される。かくして充填塔
の出口では、約７０〜８０’Ｃ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 3b. Thus, at the outlet of the packed column there is a gas temperature of about 70-80'C.
充填塔３ｂにて精製されたＳＯ□リッチの脱離ガスは硫
黄回収系４に送ら九、高純度の硫黄として回収される。The SO□-rich desorption gas purified in the packed column 3b is sent to the sulfur recovery system 4, where it is recovered as high-purity sulfur.
残ったテールガスは焼却炉５で焼却される。The remaining tail gas is incinerated in an incinerator 5.
洗浄塔３ではポンプ７によって洗浄水が循環されるが、
洗浄水槽６内のＰ Ｈ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。又洗浄水槽６のその水位
検出により、適時洗浄水はパージ排水される。In the washing tower 3, washing water is circulated by a pump 7.
Makeup water is injected in a timely manner as the pH value in the wash water tank 6 increases. Further, by detecting the water level in the cleaning water tank 6, the cleaning water is purged and drained at an appropriate time.
（効果）
従来乾式脱硫プロセスに於ては不純物（Ｎｉ＋４（１、
（ＮＨ４）２Ｓｏ４、ＨＦ 、 ＩＩｃ Ｑ、 、Ｎ８
３等）を含んだＳＯ，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。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。(Effect) In the conventional dry desulfurization process, impurities (Ni+4(1,
(NH4)2So4, HF, IIc Q, , N8
The SO and rich desorption gas containing 3, etc.) was directly sent to the sulfur recovery system, causing various problems such as clogging and corrosion of sulfur condensers, scrubbers, etc. By providing a cleaning tower between the desorption tower and the sulfur recovery system as in the present invention, (1) clogging of condensers, scrubbers, etc. is eliminated, and safe operation of the sulfur recovery system is enabled.
■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。■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.
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 脱離塔 ２ ダクト
３ 洗浄塔 ３ａ 水スプレー３ｂ 充填
塔 ４ 硫黄回収系５ （アールガスの）焼却
炉The figure shows a flue gas desulfurization process according to the present invention. In the figure: 1 Desorption tower 2 Duct 3 Washing tower 3a Water spray 3b Packed tower 4 Sulfur recovery system 5 (R gas) incinerator
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したこと
を特徴とする乾式排煙脱硫方法。A cleaning tower consisting of a water spray followed by 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. A dry flue gas desulfurization method characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60227796A JPH0229367B2 (en) | 1985-10-15 | 1985-10-15 | KANSHIKIHAIENDATSURYUHOHO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60227796A JPH0229367B2 (en) | 1985-10-15 | 1985-10-15 | KANSHIKIHAIENDATSURYUHOHO |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6287226A true JPS6287226A (en) | 1987-04-21 |
| JPH0229367B2 JPH0229367B2 (en) | 1990-06-29 |
Family
ID=16866521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60227796A Expired - Lifetime JPH0229367B2 (en) | 1985-10-15 | 1985-10-15 | KANSHIKIHAIENDATSURYUHOHO |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0229367B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143253A (en) * | 2013-03-19 | 2013-06-12 | 瓮福（集团）有限责任公司 | Device for removing low-concentration sulfur dioxide from phosphate concentrate and application method of device |
-
1985
- 1985-10-15 JP JP60227796A patent/JPH0229367B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103143253A (en) * | 2013-03-19 | 2013-06-12 | 瓮福（集团）有限责任公司 | Device for removing low-concentration sulfur dioxide from phosphate concentrate and application method of device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0229367B2 (en) | 1990-06-29 |
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