JPH042289B2 - - Google Patents
Info
- Publication number
- JPH042289B2 JPH042289B2 JP61012022A JP1202286A JPH042289B2 JP H042289 B2 JPH042289 B2 JP H042289B2 JP 61012022 A JP61012022 A JP 61012022A JP 1202286 A JP1202286 A JP 1202286A JP H042289 B2 JPH042289 B2 JP H042289B2
- Authority
- JP
- Japan
- Prior art keywords
- spray tower
- liquid
- exhaust gas
- spray
- supply device
- 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 - Lifetime
Links
- 239000007921 spray Substances 0.000 claims description 80
- 239000007788 liquid Substances 0.000 claims description 44
- 238000006386 neutralization reaction Methods 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 14
- 230000003472 neutralizing effect Effects 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000002745 absorbent Effects 0.000 claims description 9
- 239000002250 absorbent Substances 0.000 claims description 9
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 9
- 238000002844 melting Methods 0.000 claims description 9
- 230000008018 melting Effects 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 8
- 229910052602 gypsum Inorganic materials 0.000 claims description 4
- 239000010440 gypsum Substances 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 2
- VLCLHFYFMCKBRP-UHFFFAOYSA-N tricalcium;diborate Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]B([O-])[O-].[O-]B([O-])[O-] VLCLHFYFMCKBRP-UHFFFAOYSA-N 0.000 claims description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims 1
- 239000011575 calcium Substances 0.000 description 10
- 239000012530 fluid Substances 0.000 description 7
- 238000007796 conventional method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 2
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 2
- 235000011116 calcium hydroxide Nutrition 0.000 description 2
- 239000000920 calcium hydroxide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000011343 solid material Substances 0.000 description 2
- 239000000159 acid neutralizing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、亜硫酸ガスと無水ホウ酸を含むガラ
ス融解炉排ガスを処理装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an apparatus for treating glass melting furnace exhaust gas containing sulfur dioxide gas and boric anhydride.
従来の技術
従来のガラス融解炉排ガス処理装置は、たとえ
ば、第２図に示すような構成からなつている。第
２図において、２１はスプレー塔、２２は充てん
塔、２３は循環液ピツト、２４はスプレー塔液循
環ポンプ、２５は充てん塔液循環ポンプ、２６は
シツクナ、２７はフイルタプレス、２８は消石灰
供給装置、２９は排ガス導入ダクト、３０は排ガ
ス排ダクトである。すなわち、従来のガラス融解
炉排ガス中に含まれている無水ホウ酸の除去とそ
の回収方法としては、消石灰供給装置２８から循
環液ピツト２８にCa（OH）2を投入し、亜硫酸ガ
ス（SO2）の吸収と無水ホウ酸（B2O3）の除去
を、スプレー塔２１と充てん塔２２で行なつてい
た。2. Description of the Related Art A conventional glass melting furnace exhaust gas treatment apparatus has a configuration as shown in FIG. 2, for example. In Fig. 2, 21 is a spray tower, 22 is a packed tower, 23 is a circulating liquid pit, 24 is a spray tower liquid circulation pump, 25 is a packed tower liquid circulation pump, 26 is a shaker, 27 is a filter press, and 28 is a slaked lime supply. 29 is an exhaust gas introduction duct, and 30 is an exhaust gas exhaust duct. That is, as a conventional method for removing and recovering boric acid anhydride contained in the exhaust gas of a glass melting furnace, Ca(OH) 2 is introduced into the circulating fluid pit 28 from the slaked lime supply device 28, and sulfur dioxide gas (SO 2 ) and removal of boric anhydride (B 2 O 3 ) were carried out in a spray tower 21 and a packed tower 22.
発明が解決しようとする問題点
前述のように、従来の方法では、スプレー塔２
１と充てん塔２２で使用される循環液としては、
いずれも、循環液ピツト２３の同質の液体であつ
て、そのPH値が比較的高いため、とくに、充てん
塔２２においては、激しいスケーリングを生じ、
設備の停止や清掃を頻繁に行なわなければならな
いという問題点がある。本発明は、このような問
題点を解決しようとするものである。Problems to be Solved by the Invention As mentioned above, in the conventional method, the spray tower 2
The circulating fluid used in 1 and the packed tower 22 is as follows:
In both cases, the liquid in the circulating liquid pit 23 is of the same quality and has a relatively high pH value, so severe scaling occurs, especially in the packed tower 22.
There is a problem in that the equipment must be stopped and cleaned frequently. The present invention attempts to solve these problems.
問題点を解決するための手段
排ガスの流れからみて直列状に第１スプレー塔
と第２スプレー塔を設け、第１スプレー塔で
B2O3を除去し、第２スプレー塔でSO2を除去す
るようにした。また第１スプレー塔の循環液の一
部を中和タンクへ抜き出し、ここでPH値を制御す
るようにした。すなわち、本発明の構成は、亜硫
酸ガスと無水ホウ酸を含むガラス融解炉排ガスを
導入してその排ガス中の無水ホウ酸をスプレー液
によつて除去する第１スプレー塔と、この第１ス
プレー塔を出た排ガスを導入してその排ガス中の
亜硫酸ガスをスプレー液によつて除去する第２ス
プレー塔と、前記第１スプレー塔の循環液の一部
を抜き出して該液中の無水ホウ酸を中和剤で中和
してホウ酸カルシユーム生成物をつくる中和タン
クと、この中和タンクから抜き出したスラリー液
を濃縮して溢流液を前記第１スプレー塔に戻す第
１シツクナと、前記第２スプレー塔の循環液の一
部を抜き出して溢流液を前記第２スプレー塔に戻
すとともにその濃縮後の石こうスラリー液を前記
第１シツクナの液に合流させる第２シツクナと、
前記第１スプレー塔および第２スプレー塔で必要
とする水を供給する補給水供給装置と、前記中和
タンクに中和剤を供給する中和剤供給装置と、前
記第２スプレー塔に亜硫酸ガス吸収剤を供給する
吸収剤供給装置とを備えていることを特徴として
いる。Measures to solve the problem A first spray tower and a second spray tower are installed in series when viewed from the flow of exhaust gas, and the first spray tower
B 2 O 3 was removed and SO 2 was removed in a second spray tower. In addition, a part of the circulating liquid from the first spray tower was taken out to a neutralization tank, where the pH value was controlled. That is, the configuration of the present invention includes a first spray tower that introduces glass melting furnace exhaust gas containing sulfur dioxide gas and boric anhydride and removes boric acid anhydride in the exhaust gas with a spray liquid, and this first spray tower. A second spray tower introduces the exhaust gas exiting the exhaust gas and removes sulfur dioxide gas in the exhaust gas using a spray liquid, and a part of the circulating liquid of the first spray tower is extracted to remove boric anhydride from the liquid. a neutralization tank for neutralizing with a neutralizing agent to produce a calcium borate product; a first tanker for concentrating the slurry liquid extracted from the neutralization tank and returning the overflow to the first spray tower; a second strainer that extracts a portion of the circulating liquid of the second spray tower and returns the overflow liquid to the second spray tower, and merges the concentrated gypsum slurry liquid with the liquid of the first strainer;
A makeup water supply device that supplies water required by the first spray tower and the second spray tower, a neutralizing agent supply device that supplies a neutralizing agent to the neutralization tank, and a sulfur dioxide gas supply device to the second spray tower. The present invention is characterized by comprising an absorbent supply device that supplies an absorbent.
作 用
SO2とB2O3を含む排ガスを第１スプレー塔に
導入し、第１スプレー塔のスプレー液でB2O3を
除去し、こののち、その排ガスを第２スプレー塔
に導入し、第２スプレー塔の吸収剤を含むスプレ
ー液でSO2を除去する。そして、第１スプレー塔
の循環液中へはCa（OH）2、CaCO3、Mg（OH2）
などのアルカリ剤を直接投入することなく、その
循環液の一部を別に配置した中和タンクへ抜き出
し、そのタンク内へCa（OH）2を投入し、そのタ
ンク内の液のPH値の制御により溶解B2O3を除去
する。またB2O3溶液および化合物を含む第１シ
ツクナの溢流液を第２スプレー塔へは供給しなう
よいにし、第２シツクナから第１シツクナへ抜き
出した液量の相当量を工業用水などで補なうこと
で第２スプレー塔の循環液系でのB2O3の濃縮を
防止する。Effect: The exhaust gas containing SO 2 and B 2 O 3 is introduced into the first spray tower, B 2 O 3 is removed by the spray liquid in the first spray tower, and then the exhaust gas is introduced into the second spray tower. , the SO 2 is removed with a spray liquid containing an absorbent in the second spray tower. Then, Ca(OH) 2 , CaCO 3 , Mg(OH 2 ) enters the circulating fluid of the first spray tower.
A part of the circulating fluid is extracted into a separate neutralization tank, and Ca(OH) 2 is injected into that tank to control the PH value of the fluid in the tank, without directly introducing an alkaline agent such as Dissolved B 2 O 3 is removed by. In addition, the overflow liquid from the first spray tank containing the B 2 O 3 solution and compounds should not be supplied to the second spray tower, and a considerable amount of the liquid extracted from the second spray tower to the first spray tower should be supplemented with industrial water or the like. This prevents concentration of B 2 O 3 in the circulating liquid system of the second spray tower.
実施例
第１図は本発明の一実施例を示している。第１
図においては、１は第１スプレー塔、２は第２ス
プレー塔、３は排ガス導入フアン、４は前記第１
スプレー塔１と第２スプレー塔を接続している排
ガスダクト、５は第１スプレー塔液循環ポンプ、
６は第２スプレー塔液循環ポンプ、７は補給水供
給装置、８はCa（OH）2を供給するための中和剤
供給装置、９は中和タンク、１０は第１シツク
ナ、１１は第２シツクナ、１２はCaCO3または
Ca（OH）2を供給するための吸収剤供給装置、１
３は脱水機、１４は固形物、１５は前記中和剤供
給装置８と中和タンク９の間に設けられた第１流
量調整弁、１６は前記第２スプレー塔２と吸収剤
供給装置の間に設けられた第２流量調整弁であ
る。Embodiment FIG. 1 shows an embodiment of the present invention. 1st
In the figure, 1 is the first spray tower, 2 is the second spray tower, 3 is the exhaust gas introduction fan, and 4 is the first spray tower.
An exhaust gas duct connecting the spray tower 1 and the second spray tower, 5 a first spray tower liquid circulation pump,
6 is a second spray tower liquid circulation pump, 7 is a make-up water supply device, 8 is a neutralizing agent supply device for supplying Ca(OH) 2 , 9 is a neutralization tank, 10 is a first tanker, 11 is a first tank 2 sikkuna, 12 is CaCO 3 or
Absorbent supply device for supplying Ca(OH) 2 , 1
3 is a dehydrator, 14 is a solid material, 15 is a first flow rate regulating valve provided between the neutralizing agent supply device 8 and the neutralization tank 9, and 16 is a valve between the second spray tower 2 and the absorbent supply device. A second flow rate regulating valve is provided between the two.
なお第１図では、第１シツクナ１０の溢流液は
第１スプレー塔１への戻され、第２シツクナ１１
の溢流液は第２スプレー塔２へ戻されるようにな
つているが、第２シツクナ１１の溢流液を第１ス
プレー塔１へも供給するようにしてもよい。また
図示はしていないが、中和タンク９と第２スプレ
ー塔２には、それぞれの液のPHの値を検知するPH
測定器が設けられており、流量調整弁１５と１６
がそれぞれのPH測定器からの計測信号により、所
定のPH値になるように自動的にそれぞれの弁開度
が制御されるようになつている。 In FIG. 1, the overflow liquid from the first needle 10 is returned to the first spray tower 1, and the overflow liquid from the first needle 10 is returned to the second spray tower 1.
Although the overflow liquid of the second spray tower 2 is returned to the second spray tower 2, the overflow liquid of the second needle 11 may also be supplied to the first spray tower 1. Although not shown in the diagram, the neutralization tank 9 and the second spray tower 2 are equipped with a pH meter that detects the pH value of each liquid.
A measuring device is provided, and flow rate regulating valves 15 and 16 are provided.
The opening degree of each valve is automatically controlled to a predetermined PH value based on the measurement signal from each PH measuring device.
第１図に示すように構成されたガラス融解炉排
ガス処理装置においては、補給水供給装置７から
は補給水が、第１スプレー塔１と第２スプレー塔
２と中和剤供給装置８と吸収剤供給装置１２に供
給され、第１スプレー塔１と第２スプレー塔２で
はそれぞれのミストエリミネータの洗浄用スプレ
ー水となる。また第２スプレー塔２へは吸収剤供
給装置１２からCaCO3またはCa（OH）2が供給さ
れ、中和タンク９へは中和剤供給装置８かCa
（OH）2が供給される。一方、SO2とB2O3を含む
ガラス融解炉排ガスは、排ガス導入フアン３によ
り第１スプレー塔１に導入され、ここで、排ガス
中のB2O3の大部分がスプレー水とスプレー液に
より除去され、こののち、排ガスダクト４を通つ
て第２スプレー塔２に導入され、ここで、排ガス
中のSO2は、スプレー水およびPH制御により投入
されたCaCO3またはCa（OH）2のスプレー液によ
り吸収除去されてCaSO3・1/2H2Oとなり、さら
にガス中のO2によりCaSO4・2H2Oとなつて第２
シツクナ１１へ送液される。また第１スプレー塔
１の循環液の一部は中和タンク９に抜き出され、
この中和タンク９でB2O3溶解液はPH制御により
投入されたCa（OH）2と反応し、Ca3（BO3）2およ
びCaB2O4・2H2O等の固形物となり、B2O3溶解
度が低下する。このスラリー液は第２シツクナ１
１からの石こうスラリー液とともに第１シツクナ
１０へ入り、濃縮され、この濃縮後のスラリー液
は脱水機１３で固液分離され、固形物１４として
回収される。 In the glass melting furnace exhaust gas treatment apparatus configured as shown in FIG. The water is supplied to the agent supply device 12, and becomes spray water for cleaning the respective mist eliminators in the first spray tower 1 and the second spray tower 2. Further, CaCO 3 or Ca(OH) 2 is supplied to the second spray tower 2 from an absorbent supply device 12, and CaCO 3 or Ca(OH) 2 is supplied to the neutralization tank 9 from a neutralization agent supply device 8.
(OH) 2 is supplied. On the other hand, the glass melting furnace exhaust gas containing SO 2 and B 2 O 3 is introduced into the first spray tower 1 by the exhaust gas introduction fan 3, where most of the B 2 O 3 in the exhaust gas is mixed with spray water and spray liquid. After that, the SO 2 in the exhaust gas is introduced into the second spray tower 2 through the exhaust gas duct 4, where the SO 2 in the exhaust gas is removed by spray water and PH control to remove CaCO 3 or Ca(OH) 2 . It is absorbed and removed by the spray liquid to become CaSO 3 1/2H 2 O, and further converted to CaSO 4 2H 2 O by O 2 in the gas.
The liquid is sent to the liquid tanker 11. In addition, a part of the circulating liquid in the first spray tower 1 is extracted to the neutralization tank 9,
In this neutralization tank 9, the B 2 O 3 solution reacts with the Ca(OH) 2 introduced by controlling the pH, and becomes solid substances such as Ca 3 (BO 3 ) 2 and CaB 2 O 4 · 2H 2 O. B 2 O 3 solubility decreases. This slurry liquid is
The gypsum slurry from the gypsum slurry from 1 to 1 enters the first shaker 10 and is concentrated.The concentrated slurry is separated into solid and liquid by a dehydrator 13 and recovered as a solid material 14.
発明の効果
本発明は、排ガスの流れからみて、第１スプレ
ー塔と第２スプレー塔を直列状に配列し、SO2と
B2O3を含むガラス融解炉排ガスを、まず、前記
第１スプレー塔でB2O3を、つぎに、前記第２ス
プレー塔でSO2を、それぞれ個別に除去し、か
つ、前記第１スプレー塔の循環液には中和剤を直
接投入することなく、その循環液の一部を別に設
置した中和タンクへ抜き出し、このタンク内へ中
和剤を投入して溶解B2O3を除去するので、前記
第１スプレー塔でのPHを低くできることにより
B2O3飽和溶解度を高くすることができ、かつ、
前記第２スプレー塔内のB2O3溶解度が小さく、
しかも、PHも低いため、系内のスケーリング発生
を大幅に抑えることができる、設備の停止や清掃
を頻繁に行なう必要がなくなる。また前記中和タ
ンク内でのPHを簡単に高くすることができる。従
来方式より中和剤の使用量が少なくてすみ、この
ため、過剰な中和剤が大幅に低減され、かつ、こ
のことからしても、前記第１スプレーの循環液の
PHを低くすることができる。Effects of the Invention The present invention arranges the first spray tower and the second spray tower in series from the perspective of the flow of exhaust gas, so that SO 2 and
From the glass melting furnace exhaust gas containing B 2 O 3 , B 2 O 3 is first removed in the first spray tower, then SO 2 is removed in the second spray tower, and Rather than directly introducing neutralizing agent into the circulating fluid of the spray tower, a portion of the circulating fluid is drawn out to a separately installed neutralization tank, and the neutralizing agent is introduced into this tank to remove dissolved B 2 O 3 . The pH in the first spray tower can be lowered by removing
B 2 O 3 saturation solubility can be increased, and
B 2 O 3 solubility in the second spray tower is low;
Moreover, since the pH is low, scaling within the system can be significantly suppressed, and there is no need to frequently stop or clean the equipment. Further, the pH inside the neutralization tank can be easily increased. The amount of neutralizing agent used is smaller than that of the conventional method, and as a result, the amount of excessive neutralizing agent is significantly reduced.
PH can be lowered.
第１図は本発明の一実施例を示した説明図、第
２図は従来のこの種の装置の一塔例を示した説明
図である。
１……第１スプレー塔、２……第２スプレー
塔、７……補給水供給装置、８……中和剤供給装
置、９……中和タンク、１０……第１シツクナ、
１１……第２シツクナ、１２……吸収剤供給装
置。
FIG. 1 is an explanatory diagram showing one embodiment of the present invention, and FIG. 2 is an explanatory diagram showing an example of a conventional device of this type. DESCRIPTION OF SYMBOLS 1... First spray tower, 2... Second spray tower, 7... Makeup water supply device, 8... Neutralizing agent supply device, 9... Neutralization tank, 10... First shaker,
11...Second needle, 12...Absorbent supply device.
Claims (1)
排ガスを導入してその排ガス中の無水ホウ酸をス
プレー液によつて除去する第１スプレー塔と、こ
の第１スプレー塔を出た排ガスを導入してその排
ガス中の亜硫酸ガスをスプレー液によつて除去す
る第２スプレー塔と、前記第１スプレー塔の循環
液の一部を抜き出して該液中の無水ホウ酸を中和
剤で中和してホウ酸カルシユーム生成物をつくる
中和タンクと、この中和タンクから抜き出したス
ラリー液を濃縮して溢流液を前記第１スプレー塔
に戻す第１シツクナと、前記第２スプレー塔の循
環液の一部を抜き出して溢流液を前記第２スプレ
ー塔に戻すとともにその濃縮後の石こうスラリー
液を前記第１シツクナの液に合流させる第２シツ
クナと、前記第１スプレー塔および第２スプレー
塔で必要とする水を供給する補給水供給装置と、
前記中和タンクに中和剤を供給する中和剤供給装
置と、前記第２スプレー塔に亜硫酸ガス吸収剤を
供給する吸収剤供給装置とを備えていることを特
徴とする、ガラス融解炉排ガス処理装置。1. A first spray tower that introduces glass melting furnace exhaust gas containing sulfur dioxide gas and boric anhydride and removes boric anhydride in the exhaust gas with a spray liquid, and introduces the exhaust gas that exited the first spray tower. a second spray tower for removing sulfurous acid gas in the exhaust gas with a spray liquid, and a part of the circulating liquid of the first spray tower is extracted and boric anhydride in the liquid is neutralized with a neutralizing agent. a neutralization tank for producing a calcium borate product; a first tanker for concentrating the slurry liquid extracted from the neutralization tank and returning the overflow to the first spray tower; and a circulating liquid for the second spray tower. a second filter that extracts a portion of the liquid and returns the overflow liquid to the second spray tower and combines the concentrated gypsum slurry liquid with the liquid of the first spray tower; and the first spray tower and the second spray tower. a make-up water supply device that supplies the water needed by the
A glass melting furnace exhaust gas comprising: a neutralizing agent supply device that supplies a neutralizing agent to the neutralization tank; and an absorbent supply device that supplies a sulfur dioxide gas absorbent to the second spray tower. Processing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61012022A JPS62171731A (en) | 1986-01-24 | 1986-01-24 | Apparatus for treating exhaust gas of glass melting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61012022A JPS62171731A (en) | 1986-01-24 | 1986-01-24 | Apparatus for treating exhaust gas of glass melting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62171731A JPS62171731A (en) | 1987-07-28 |
| JPH042289B2 true JPH042289B2 (en) | 1992-01-17 |
Family
ID=11793972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61012022A Granted JPS62171731A (en) | 1986-01-24 | 1986-01-24 | Apparatus for treating exhaust gas of glass melting furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62171731A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101487048B1 (en) * | 2007-12-05 | 2015-01-28 | 아사히 가라스 가부시키가이샤 | Process for producing boron-containing glass product and method for purifying waste gas generated in production of boron-containing glass product |
| EP2716609B1 (en) | 2011-05-25 | 2016-02-03 | Asahi Glass Company, Limited | Method for manufacturing granulated body, method for manufacturing molten glass, and method for manufacturing glass article |
| JP5857802B2 (en) * | 2012-03-05 | 2016-02-10 | 日本電気硝子株式会社 | Exhaust gas treatment method and exhaust gas treatment apparatus |
| GB201502542D0 (en) * | 2015-02-14 | 2015-04-01 | Etimine S A | A process which is for the removal of gaseous boron species from furnace flue gases and which is such that an agricultural fertiliser is produced |
| JP7042692B2 (en) * | 2018-05-30 | 2022-03-28 | 日本電気硝子株式会社 | Treatment liquid treatment method and exhaust gas treatment method |
-
1986
- 1986-01-24 JP JP61012022A patent/JPS62171731A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62171731A (en) | 1987-07-28 |
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| EXPY | Cancellation because of completion of term |