JPH0810527A - Method for washing and dehydrating gypsum slurry - Google Patents
Method for washing and dehydrating gypsum slurryInfo
- Publication number
- JPH0810527A JPH0810527A JP6146137A JP14613794A JPH0810527A JP H0810527 A JPH0810527 A JP H0810527A JP 6146137 A JP6146137 A JP 6146137A JP 14613794 A JP14613794 A JP 14613794A JP H0810527 A JPH0810527 A JP H0810527A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- cake layer
- washing
- layer
- gypsum cake
- 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
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 66
- 239000010440 gypsum Substances 0.000 title claims abstract description 66
- 238000005406 washing Methods 0.000 title claims abstract description 29
- 239000002002 slurry Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000010419 fine particle Substances 0.000 claims abstract description 18
- 230000018044 dehydration Effects 0.000 abstract description 15
- 238000006297 dehydration reaction Methods 0.000 abstract description 15
- 239000012535 impurity Substances 0.000 abstract description 12
- 230000035699 permeability Effects 0.000 abstract description 10
- 238000001914 filtration Methods 0.000 abstract description 8
- 239000000460 chlorine Substances 0.000 abstract description 4
- 229910052801 chlorine Inorganic materials 0.000 abstract description 3
- -1 chlorine ions Chemical class 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000967 suction filtration Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical group [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Landscapes
- Filtration Of Liquid (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は排煙脱硫装置で得られる
石膏スラリの洗浄脱水方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning and dehydrating gypsum slurry obtained by a flue gas desulfurization device.
【０００２】[0002]
【従来の技術】石膏スラリ用脱水機は排煙脱硫プロセス
の変更（スート混合方式の採用、すなわち冷却塔と吸収
塔の一体化によるスラリ液中の塩素イオンの増加）によ
る装置の耐食性や処理量の増加による大型化に伴う設備
費、運転費、保守費及び脱水性能の総合評価の結果から
従来の遠心分離機方式から図６に示すようなベルトフィ
ルタによるバスケット型真空吸引脱水方式が採用される
ようになっている。2. Description of the Related Art A dehydrator for gypsum slurries has a corrosion resistance and treatment amount due to a change in flue gas desulfurization process (adoption of soot mixing method, that is, increase of chlorine ion in slurry liquid due to integration of cooling tower and absorption tower). As a result of comprehensive evaluation of equipment cost, operation cost, maintenance cost and dehydration performance due to increase in size, basket type vacuum suction dehydration system with belt filter as shown in FIG. 6 is adopted from conventional centrifuge system. It is like this.
【０００３】図６において、石膏スラリ５は供給ヘッダ
６からベルトフィルタ４上へ供給され、第１真空ボック
ス部７で真空吸引ろ過される。真空吸引ろ過して得られ
たベルトフィルタ４上の石膏ケーキ３はゴムベルト８に
より第２真空ボックス部１０へ送られる。この時、洗浄
水供給装置９より石膏ケーキ３上に洗浄液が供給され
る。第２真空ボックス部１０で洗浄水を真空吸引ろ過し
たのち、更に所定時間真空吸引して石膏ケーキ３中の水
分を脱水する。脱水された石膏ケーキ３はゴムベルト８
により回収コンベア１１部へ送られて、ベルトフィルタ
４から剥離して回収コンベア１１に回収される。石膏ケ
ーキ３を剥離したベルトフィルタ４はベルトフィルタ洗
浄装置１２で洗浄された後スラリ供給部へ送られる。In FIG. 6, the gypsum slurry 5 is supplied from the supply header 6 onto the belt filter 4 and vacuum suction filtered in the first vacuum box section 7. The gypsum cake 3 on the belt filter 4 obtained by vacuum suction filtration is sent to the second vacuum box section 10 by the rubber belt 8. At this time, the cleaning liquid is supplied from the cleaning water supply device 9 onto the gypsum cake 3. The washing water is vacuum suction filtered in the second vacuum box unit 10, and then vacuum suction is further performed for a predetermined time to dehydrate the water in the gypsum cake 3. The dehydrated gypsum cake 3 has a rubber belt 8
Is sent to the recovery conveyor 11 and separated from the belt filter 4 to be recovered by the recovery conveyor 11. The belt filter 4 from which the gypsum cake 3 has been peeled off is washed by the belt filter washing device 12 and then sent to the slurry supply section.
【０００４】[0004]
【発明が解決しようとする課題】既存のベルトフィルタ
による真空吸引脱水方法では、スラリ中に含まれる微細
な不純物、例えば未燃カーボンや、フッ化カルシウム、
シリカ、水酸化アルミニウム、水酸化鉄からなる微粒子
ダストがケーキ表面で連続膜状層となるため、真空吸引
時にケーキ層の通気性が悪く、遠心分離機に比較して脱
水性能が劣る欠点がある。本発明は上記技術水準に鑑
み、石膏スラリをベルトフィルタ上で脱水するに当り、
上述したような不具合のない石膏スラリの脱水方法を提
供しようとするものである。In the vacuum suction dehydration method using the existing belt filter, fine impurities contained in the slurry, such as unburned carbon and calcium fluoride,
Since fine particle dust consisting of silica, aluminum hydroxide, and iron hydroxide forms a continuous film-like layer on the cake surface, the cake layer has poor breathability during vacuum suction, and there is the disadvantage that the dehydration performance is inferior to that of a centrifuge. . The present invention, in view of the above technical level, when dehydrating the gypsum slurry on the belt filter,
An object of the present invention is to provide a method for dehydrating gypsum slurry without the above-mentioned problems.
【０００５】[0005]
【課題を解決するための手段】本発明は （１）ベルトフィルタおよび真空脱水装置を用いて石膏
スラリを吸引脱水して、ベルトフィルタ上に石膏ケーキ
層を形成させた後、さらに吸引脱水しながら該石膏ケー
キ層を洗浄水により洗浄する石膏スラリの洗浄脱水方法
において、該石膏ケーキ層の洗浄水の供給前および／ま
たは後に該石膏ケーキ層表面の不純物微粒子膜状層を破
壊することを特徴とする石膏スラリの洗浄脱水方法。 （２）洗浄水が４５℃以上であることを特徴とする上記
（１）記載の石膏スラリ洗浄脱水方法。である。According to the present invention, (1) a gypsum slurry is sucked and dewatered by using a belt filter and a vacuum dewatering device to form a gypsum cake layer on the belt filter, and then by suction and dewatering. In the method for washing and dehydrating the gypsum slurry for washing the gypsum cake layer with washing water, the impurity fine particle film layer on the surface of the gypsum cake layer is destroyed before and / or after the washing water is supplied to the gypsum cake layer. Method for washing and dehydrating plaster slurry. (2) The gypsum slurry washing and dehydrating method according to (1) above, wherein the washing water is at 45 ° C. or higher. Is.
【０００６】[0006]
【作用】石膏ケーキ層表面の不純物微粒子膜状層を破壊
する手段により、ケーキ層表面の通気性を悪化させてい
る連続膜状層を破壊し、石膏ケーキ層内に混合分散する
ことで、微細粒子の緻密な膜がなくなり真空吸引時の石
膏ケーキ層の通気性を改善することができる。また、真
空吸引時の石膏ケーキ層の通気性がよくなることによ
り、脱水性能が改善される。さらに、洗浄水を４５℃以
上として供給し、石膏ケーキ層内の間隙水を昇温するこ
とにより、間隙水の粘度および表面張力を小さくでき微
粒子間移動抵抗を下げ通気性がよくなる。[Function] By destroying the impurity fine particle film-like layer on the surface of the gypsum cake layer, the continuous film-like layer on the surface of the cake layer, which is impairing air permeability, is destroyed and mixed and dispersed in the gypsum cake layer to obtain fine particles. The dense film of particles is eliminated, and the air permeability of the gypsum cake layer during vacuum suction can be improved. In addition, dehydration performance is improved by improving the air permeability of the gypsum cake layer during vacuum suction. Further, by supplying washing water at 45 ° C. or higher and raising the temperature of the pore water in the gypsum cake layer, the viscosity and surface tension of the pore water can be reduced and the migration resistance between fine particles can be lowered to improve the air permeability.
【０００７】[0007]
【実施例】以下、本発明の具体的な実施例をあげ、本発
明の効果を明らかにする。EXAMPLES The effects of the present invention will be clarified by giving concrete examples of the present invention.
【０００８】（実施例１）本発明の一実施例を図１によ
って説明する。図１において、７および１０は真空脱水
装置で７は第１真空ボックス部、１０は第２真空ボック
ス部である。８は真空ボックス部７および１０の上面に
接して移動巡回する搬送用のゴムベルト、４は搬送用の
ゴムベルト８の上面に載って移動巡回する通気性を有す
るベルトフィルタ（ろ布）、９は機器類の腐食を防ぐた
めに石膏スラリに含まれる高濃度の塩素イオンを洗い流
すための洗浄水供給装置、６は石膏スラリの供給ヘッ
ダ、５は石膏スラリの供給ヘッダ６から供給されベルト
フィルタ４の上に載せられた石膏スラリ、３は真空ボッ
クス部７および１０によりベルトフィルタ４を介して脱
水した石膏ケーキ層である。石膏ケーキ層３は搬送用の
ゴムベルト８の動きに従って移動するベルトフィルタ４
の上を移動してゆき、第２真空ボックス部１０を通過
後、回収コンベア１１に移され、次工程へ移動する。さ
らにベルトフィルタ４は搬送用のゴムベルト８の下部に
おいてローラで指示されながら、ベルトフィルタ洗浄装
置１２により洗浄され、再度第１真空ボックス部７上面
へと巡回する。以上は従来技術と同様である。(Embodiment 1) An embodiment of the present invention will be described with reference to FIG. In FIG. 1, 7 and 10 are vacuum dehydrators, 7 is a first vacuum box section, and 10 is a second vacuum box section. Reference numeral 8 is a rubber belt for transportation that moves and circulates in contact with the upper surfaces of the vacuum box portions 7 and 10, 4 is a belt filter (filter cloth) having air permeability that travels on the upper surface of the rubber belt 8 for transportation, and 9 is a device. To supply high-concentration chlorine ions contained in the gypsum slurry to prevent corrosion of the gypsum slurry, 6 is a gypsum slurry supply header, 5 is a gypsum slurry supply header 6 on the belt filter 4. The placed gypsum slurry 3 is a gypsum cake layer dehydrated through the belt filter 4 by the vacuum boxes 7 and 10. The gypsum cake layer 3 is a belt filter 4 that moves according to the movement of a rubber belt 8 for transportation.
After passing through the second vacuum box section 10, it is moved to the recovery conveyor 11 and moves to the next step. Further, the belt filter 4 is cleaned by the belt filter cleaning device 12 while being instructed by the roller below the conveying rubber belt 8, and is circulated again to the upper surface of the first vacuum box unit 7. The above is the same as the conventional technique.
【０００９】本発明は前記構成によりなる石膏スラリの
真空脱水装置において、洗浄水供給装置９により石膏ス
ラリに含まれる塩素イオンを洗い流した後、石膏ケーキ
層表面の不純物微粒子膜状層を破壊するダンディーロー
ル２を新たに設けたものである。ダンディーロール２は
ドラムの外部に多数の突起を有したもので、回転させる
ことによって該突起により前記不純物微粒子膜状層を破
壊するものである。ここでダンディーロールの設置位置
は図４に示すように不純物微粒子膜状層表面に該突起が
あたり、十分に該膜を破壊できるようにダンディーロー
ル取付け高さを調整する。該ダンディーロール２の回転
方向はベルトフィルタ４の進行方向と対向するように回
転させることが好ましい。図４において、１は不純物微
粒子膜状層、２はダンディーロール、３は石膏ケーキ
層、４はベルトフィルタである。According to the present invention, in the vacuum dehydrator for a gypsum slurry having the above-mentioned structure, the chlorine water contained in the gypsum slurry is washed away by the cleaning water supply device 9 and thereafter the fine particulate film layer on the surface of the gypsum cake layer is destroyed. The roll 2 is newly provided. The dandy roll 2 has a large number of protrusions on the outside of the drum, and when rotated, the protrusions destroy the impurity fine particle film layer. Here, the installation position of the dandy rolls is adjusted so that the protrusions hit the surface of the impurity particulate film layer as shown in FIG. It is preferable to rotate the dandy roll 2 so as to face the traveling direction of the belt filter 4. In FIG. 4, 1 is an impurity fine particle film layer, 2 is a dandy roll, 3 is a gypsum cake layer, and 4 is a belt filter.
【００１０】（実施例２）前記実施例において、洗浄水
供給装置９下流側にあったダンディーロール２を図２に
示すように上流側に配置して洗浄水供給前段階にて不純
物微粒子膜状層を破壊するものである。図２中、２′は
上流側に配置したダンディーロールを示す。その他は図
１と同じであるので説明は省略する。(Embodiment 2) In the above-mentioned embodiment, the dandy roll 2 located on the downstream side of the cleaning water supply device 9 is arranged on the upstream side as shown in FIG. It destroys the layers. In FIG. 2, 2'denotes a dandy roll arranged on the upstream side. Others are the same as those in FIG. 1, and thus description thereof will be omitted.
【００１１】（実施例３）図３に示すように、第１のダ
ンディーロール２′を洗浄水供給装置９より上流側に設
置すると共に、洗浄水供給装置９の下流側にも第２のダ
ンディーロール２を設ければ、洗浄前後の２段階にて不
純物微粒子膜状層を破壊することができる。その他の符
号は図１と同じであるので説明は省略する。(Embodiment 3) As shown in FIG. 3, a first dandy roll 2'is installed upstream of the cleaning water supply device 9 and a second dandy is provided downstream of the cleaning water supply device 9 as well. When the roll 2 is provided, the impurity fine particle film layer can be destroyed in two steps before and after cleaning. Since the other reference numerals are the same as those in FIG. 1, the description thereof will be omitted.
【００１２】（実施例４）前記実施例１〜３の洗浄水供
給装置９において、洗浄水温度を４５℃以上にして供給
するもので、洗浄効果を高めると同時に石膏ケーキ層内
の間隙水の温度を高め該粘度および表面張力を下げるこ
とができ、従来の２０〜４５℃の洗浄水に比べ脱水効果
をさらに高めることができる。(Embodiment 4) In the cleaning water supply device 9 of the above-mentioned Embodiments 1 to 3, the cleaning water is supplied at a temperature of 45 ° C. or higher, so that the cleaning effect is enhanced and at the same time the pore water in the gypsum cake layer is increased. The temperature can be raised to lower the viscosity and surface tension, and the dehydration effect can be further enhanced as compared with the conventional wash water of 20 to 45 ° C.
【００１３】図５は前記実施例１において、洗浄水の温
度を４５，７０，９０℃としたときの実験例を示したも
ので、このときの石膏ケーキ層含水率とろ過速度を示し
たものである。実験で用いた石膏スラリは固形分濃度：
１８．７％、石膏純度：９７．５％のものを１６００ｇ
用い、またベルトフィルタにはＮ６８１Ｃ（敷島カンバ
スの商品名称、通気度は１２００ｃｃ／ｍｉｎ ｃ
ｍ2 ）を使用し、真空ボックスの真空度を−６００ｍｍ
Ｈｇ、ベルトフィルタ面積を７８．５ｃｍ2 として吸引
ろ過したものである。また不純物微粒子膜状層の破壊に
はダンディーロール２に替えガラス棒を用いて攪拌し、
破壊された該微粒子膜が石膏ケーキ層内に混合分散する
ようにして、吸引ろ過した。このときの洗浄水温度の変
化に対する石膏ケーキ層含水率およびろ過速度の結果を
表１に示す。FIG. 5 shows an experimental example in which the temperature of the washing water was set to 45, 70 and 90 ° C. in Example 1 and the water content and filtration rate of the gypsum cake layer at this time are shown. Is. The gypsum slurry used in the experiment has a solid content concentration:
18.7g with 18.7% and gypsum purity: 97.5%
N681C (brand name of Shikishima canvas, air permeability is 1200 cc / min c)
m 2 ) and the vacuum degree of the vacuum box is -600 mm
It was obtained by suction filtration with Hg and a belt filter area of 78.5 cm 2 . Further, in order to destroy the impurity fine particle film layer, a glass rod is used instead of the dandy roll 2 and stirred.
The broken fine particle film was mixed and dispersed in the gypsum cake layer and suction-filtered. Table 1 shows the results of the water content of the gypsum cake layer and the filtration rate with respect to changes in the temperature of the washing water at this time.
【００１４】[0014]
【表１】 この表を曲線にしたものが図５である。[Table 1] A curve of this table is shown in FIG.
【００１５】これらの図表によれば、洗浄水の温度が高
くなればなる程ろ過速度が上がり、同時に石膏ケーキ層
含水率は下がり、洗浄水温度を高くするにつれて脱水効
果が向上していることが分かる。また、洗浄水の温度は
特に４５〜７０℃の領域においてろ過速度および石膏ケ
ーキ層含水率を顕著に改善させるが、７０℃以上になる
と曲線は横ばい傾向となり、あまり顕著な改善はみられ
なくなる。According to these figures, the higher the temperature of the wash water, the higher the filtration rate, and at the same time, the lower the water content of the gypsum cake layer, and the higher the wash water temperature, the better the dehydration effect. I understand. Further, the temperature of the washing water remarkably improves the filtration rate and the water content of the gypsum cake layer particularly in the region of 45 to 70 ° C., but at 70 ° C. or higher, the curve tends to be flat, and a notable improvement is not seen.
【００１６】なお、参考までに洗浄水温度を従来の最高
温度である４５℃とし、かつ不純物微粒子膜状層を破壊
しないで真空脱水した実験例を図５中の◎印で示す。こ
れは石膏ケーキ層の不純物微粒子膜状層を破壊しないこ
と以外は、前記の実験と全く同様に行ったものである。
本実験によれば、石膏ケーキ層含水率は１０．６重量
％、ろ過速度は１．６ｍ 3 ／ｍ2 ｈであった。For reference, the washing water temperature is the highest
The temperature is 45 ° C, and the fine particle film layer of impurities is destroyed.
An experimental example of vacuum dehydration without being shown is indicated by a double circle in FIG. This
This does not destroy the fine particulate film layer of the gypsum cake layer.
Except for the above, the experiment was performed in exactly the same manner as the above experiment.
According to this experiment, the water content of the gypsum cake layer is 10.6 weight.
%, Filtration speed is 1.6m 3/ M2It was h.
【００１７】以上の実験より、同一温度でも石膏ケーキ
層の不純物微粒子膜状層を破壊した場合としない場合と
では脱水効果に顕著な差がみられ、不純物微粒子膜状層
を破壊することにより、破壊しないときよりろ過速度で
６８％増、石膏ケーキ層含水率で８．５％減の成果が得
られた。From the above experiments, a significant difference was found in the dehydration effect between the case where the gypsum cake layer of the gypsum cake layer was destroyed and the case where the gypsum cake layer was not destroyed. The results were that the filtration rate was increased by 68% and the gypsum cake layer water content was decreased by 8.5% compared with the case without destruction.
【００１８】[0018]
【発明の効果】以上、説明したように、本発明の洗浄脱
水方法によればケーキ層表面の不純物微粒子膜状層を破
壊することにより、真空吸引時の石膏ケーキ層の通気性
を改善し、脱水性能を向上させることができ、また脱水
性能の改善により、ろ過時間の短縮を達成することがで
きる。さらに、洗浄水の温度を従来の２０〜４５℃から
４５℃以上とすることにより、石膏ケーキ層の間隙水を
昇温し間隙水の粘度および表面張力を下げ、もって微粒
子間を洗浄水が移動する際の抵抗を下げるという効果を
得ることができる。As described above, according to the washing and dehydration method of the present invention, the impure fine particle film layer on the surface of the cake layer is destroyed to improve the air permeability of the gypsum cake layer during vacuum suction, The dehydration performance can be improved, and the reduction of the filtration time can be achieved by the improvement of the dehydration performance. Furthermore, by raising the temperature of the washing water from the conventional temperature of 20 to 45 ° C. to 45 ° C. or higher, the pore water of the gypsum cake layer is heated to lower the viscosity and surface tension of the pore water, so that the washing water moves between the fine particles. It is possible to obtain the effect of lowering the resistance when doing.
【図１】本発明の第１実施例の説明図。FIG. 1 is an explanatory diagram of a first embodiment of the present invention.
【図２】本発明の第２実施例の説明図。FIG. 2 is an explanatory diagram of a second embodiment of the present invention.
【図３】本発明の第３実施例の説明図。FIG. 3 is an explanatory diagram of a third embodiment of the present invention.
【図４】本発明の一実施例のダンディーロールの設置位
置の説明図。FIG. 4 is an explanatory view of the installation position of the dandy roll according to the embodiment of the present invention.
【図５】本発明の洗浄脱水効果の一例を示す図表。FIG. 5 is a chart showing an example of the washing and dehydrating effect of the present invention.
【図６】従来の石膏スラリの洗浄脱水方法の一態様の説
明図。FIG. 6 is an explanatory diagram of one embodiment of a conventional method for cleaning and dehydrating gypsum slurry.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ０１Ｄ 33/44 33/58 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location B01D 33/44 33/58
Claims (2)
いて石膏スラリを吸引脱水して、ベルトフィルタ上に石
膏ケーキ層を形成させた後、さらに吸引脱水しながら該
石膏ケーキ層を洗浄水により洗浄する石膏スラリの洗浄
脱水方法において、該石膏ケーキ層の洗浄水の供給前お
よび／または後に該石膏ケーキ層表面の不純物微粒子膜
状層を破壊することを特徴とする石膏スラリの洗浄脱水
方法。1. A gypsum slurry is sucked and dewatered by using a belt filter and a vacuum dewatering device to form a gypsum cake layer on the belt filter, and then the gypsum cake layer is washed with washing water while being further sucked and dewatered. A method for washing and dewatering a gypsum slurry, characterized in that, in the method for washing and dewatering a gypsum slurry, the impure fine particle film layer on the surface of the gypsum cake layer is destroyed before and / or after the washing water is supplied to the gypsum cake layer.
する請求項１記載の石膏スラリ洗浄脱水方法。2. The method for washing and dehydrating gypsum slurry according to claim 1, wherein the washing water is at 45 ° C. or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06146137A JP3117362B2 (en) | 1994-06-28 | 1994-06-28 | Washing and dewatering method for gypsum slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06146137A JP3117362B2 (en) | 1994-06-28 | 1994-06-28 | Washing and dewatering method for gypsum slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0810527A true JPH0810527A (en) | 1996-01-16 |
| JP3117362B2 JP3117362B2 (en) | 2000-12-11 |
Family
ID=15400985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06146137A Expired - Fee Related JP3117362B2 (en) | 1994-06-28 | 1994-06-28 | Washing and dewatering method for gypsum slurry |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3117362B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006110426A (en) * | 2004-10-13 | 2006-04-27 | Ishikawajima Harima Heavy Ind Co Ltd | Gypsum dewatering equipment |
| JP2016107230A (en) * | 2014-12-09 | 2016-06-20 | Ｊｘエネルギー株式会社 | Gypsum dehydration apparatus |
| JP2022006746A (en) * | 2020-06-24 | 2022-01-13 | 中国電力株式会社 | Gypsum separator |
| JP2023072817A (en) * | 2021-11-15 | 2023-05-25 | 三菱重工業株式会社 | Gypsum recovery device |
| CN116371075A (en) * | 2023-05-15 | 2023-07-04 | 美蓝飘尔(上海)过滤设备有限公司 | Central water purifying equipment |
| CN117717826A (en) * | 2023-12-28 | 2024-03-19 | 华能(福建)能源开发有限公司福州分公司 | A kind of wet desulfurization gypsum treatment method |
| WO2025225202A1 (en) * | 2024-04-24 | 2025-10-30 | 三菱重工業株式会社 | Gypsum dehydration system |
-
1994
- 1994-06-28 JP JP06146137A patent/JP3117362B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006110426A (en) * | 2004-10-13 | 2006-04-27 | Ishikawajima Harima Heavy Ind Co Ltd | Gypsum dewatering equipment |
| JP2016107230A (en) * | 2014-12-09 | 2016-06-20 | Ｊｘエネルギー株式会社 | Gypsum dehydration apparatus |
| JP2022006746A (en) * | 2020-06-24 | 2022-01-13 | 中国電力株式会社 | Gypsum separator |
| JP2023072817A (en) * | 2021-11-15 | 2023-05-25 | 三菱重工業株式会社 | Gypsum recovery device |
| CN116371075A (en) * | 2023-05-15 | 2023-07-04 | 美蓝飘尔(上海)过滤设备有限公司 | Central water purifying equipment |
| CN116371075B (en) * | 2023-05-15 | 2025-05-23 | 美蓝飘尔(上海)过滤设备有限公司 | A central water purification device |
| CN117717826A (en) * | 2023-12-28 | 2024-03-19 | 华能(福建)能源开发有限公司福州分公司 | A kind of wet desulfurization gypsum treatment method |
| WO2025138583A1 (en) * | 2023-12-28 | 2025-07-03 | 华能(福建)能源开发有限公司福州分公司 | Wet flue gas desulfurization gypsum treatment method |
| WO2025225202A1 (en) * | 2024-04-24 | 2025-10-30 | 三菱重工業株式会社 | Gypsum dehydration system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3117362B2 (en) | 2000-12-11 |
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