JP3598950B2 - Method and apparatus for treating shellfish recovered from intake channel of thermal power plant - Google Patents
Method and apparatus for treating shellfish recovered from intake channel of thermal power plant Download PDFInfo
- Publication number
- JP3598950B2 JP3598950B2 JP2000208806A JP2000208806A JP3598950B2 JP 3598950 B2 JP3598950 B2 JP 3598950B2 JP 2000208806 A JP2000208806 A JP 2000208806A JP 2000208806 A JP2000208806 A JP 2000208806A JP 3598950 B2 JP3598950 B2 JP 3598950B2
- Authority
- JP
- Japan
- Prior art keywords
- shellfish
- power plant
- thermal power
- washing
- intake channel
- 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 - Fee Related
Links
- 235000015170 shellfish Nutrition 0.000 title claims description 96
- 238000000034 method Methods 0.000 title claims description 10
- 238000005406 washing Methods 0.000 claims description 63
- 239000002351 wastewater Substances 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000007921 spray Substances 0.000 claims description 25
- 230000002378 acidificating effect Effects 0.000 claims description 22
- 238000012545 processing Methods 0.000 claims description 13
- 239000005416 organic matter Substances 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 10
- 235000013372 meat Nutrition 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000012716 precipitator Substances 0.000 claims description 6
- 239000013535 sea water Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 239000004568 cement Substances 0.000 description 9
- 239000002994 raw material Substances 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 238000006386 neutralization reaction Methods 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 230000001877 deodorizing effect Effects 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241000238586 Cirripedia Species 0.000 description 1
- 208000005156 Dehydration Diseases 0.000 description 1
- 241000237536 Mytilus edulis Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- -1 admixture Substances 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 235000011116 calcium hydroxide Nutrition 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 235000020638 mussel Nutrition 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Images
Landscapes
- Processing Of Solid Wastes (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は貝類の洗浄分離に関し、火力発電所において、海水の取水路より回収した貝類を酸性の機器洗浄排水で貝殻と貝肉等の有機物とに洗浄分離することにより貝殻の無臭化・低塩分化を図り、良好なセメント原料等を得るための貝類の処理方法に関する。
【0002】
【従来の技術及び発明が解決しようとする課題】
従来、火力発電所においては、発電設備の復水器の冷却水として海水が取水路を経て導入使用されるが、その水路底側面にはムラサキイガイ及びフジツボ等の貝類が生育・付着し、水流抵抗を増大させ、あるいは一部剥離して流れ出た貝類が発電所の冷却管に閉塞するなどの問題を発生させるため、定期的に貝類を剥離除去しなければならない。この取水路に付着する貝類の年間除去量は、火力発電所で1回当たり数百トンにも及ぶもので、大量の貝類が除去される。その除去貝類はほとんどが埋め立て処分、又は焼却して有資源化する方法等が行われていたが、近年廃棄物処理法改正で埋め立て処分場の構造が強化されたことによる腐敗異臭対策が課題になつている。
【0003】
一方、最近では前記貝類の建築・土木分野でのコンクリート材料(セメント原料・混和材・骨材)等への有効利用も考えられているが、コンクリートへの塩分混入によるコンクリート強度の低下や鉄筋の発錆が促進されるため、セメント・コンクリート原料とする貝類の低塩分化技術の開発が課題となっている。
【0004】
【課題を解決するための手段】
本発明者らは、上記事情に鑑み、火力発電所取水路付着貝類の有効利用を促進し、貝殻の無臭化、低塩分化によるセメント原料等への提供を図るべく鋭意研究し、下記構成の本発明をなすに至った。
(1)火力発電所取水路から回収された貝類に、火力発電所設備の空気予熱器又は電気集塵器の洗浄排水である酸性洗浄排水を散水して、貝殻と貝肉等の有機物とに洗浄分離することを特徴とする火力発電所取水路から回収された貝類の処理方法。
(2)火力発電所取水路から回収された貝類を上下多段配置の振動スクリーンに載置し、その上から火力発電所設備の空気予熱器又は電気集塵器の洗浄排水である酸性洗浄排水を散水して、貝殻と貝肉等の有機物とに洗浄分離することを特徴とする火力発電所取水路から回収された貝類の処理方法。
(3)火力発電所取水路から回収された貝類を載置するための上下多段配置の振動スクリーンとその上から火力発電所設備の空気予熱器又は電気集塵器の洗浄排水である酸性洗浄排水を散水するシャワリング装置とからなる、酸性洗浄排水の散水により貝類を貝殻と貝肉等の有機物とに洗浄分離するための貝類洗浄分離装置を備えてなることを特徴とする火力発電所取水路から回収された貝類の処理装置。
(4)酸性洗浄排水の散水により貝類を貝殻と貝肉等の有機物とに洗浄分離するための貝類洗浄分離装置が、上下多段配置の振動スクリーンとスプレーノズルを備えたシャワーリング装置とからなるものであることを特徴とする前項3に記載の火力発電所取水路から回収された貝類の処理装置。
(5)上下多段配置の振動スクリーンが、水平方向への振動と上下方向への振動ができるものであることを特徴とする前項3又は4に記載の火力発電所取水路から回収された貝類の処理装置。
(6)シャワーリング装置が、散水方向を変更調整できるスプレーノズルを備えてなるものであることを特徴とする前項3〜5のいずれか1項に記載の火力発電所取水路から回収された貝類の処理装置。
(7)貝類洗浄分離装置の前方に取水路から回収された貝類と泥水と海水とを含む混合液が供給される受水槽を設け、該受水槽にはその下方部に傾斜板を配設してなることを特徴とする前項3〜6のいずれか1項に記載の火力発電所取水路から回収された貝類の処理装置。
(8)貝類洗浄分離装置の下部に洗浄排水受槽を配置し、かつ同受槽にはオーバーフロー管を取り付けてなることを特徴とする前項3〜7のいずれか1項に記載の火力発電所取水路から回収された貝類の処理装置。
【0005】
上記本発明で使用される火力発電所から排出される酸性洗浄排水は、火力発電所設備の空気予熱器又は電気集塵器を水で洗浄して排出された洗浄排水であり、酸性(pH:2〜3)で金属成分として主にFeと炭素元素を含み、他に微量のNa、Mg、Ca、Al、Si、V、Ni等を含んでいる。
従来、該酸性洗浄排水は、中和処理され固液分離処理された後、排水処理装置を介して排出されていた。
また、本発明の洗浄分離装置は、貝類の処理量・処理速度に合わせて上下多段配置の振動スクリーンとシャワーリング装置(スプレー管に多数のスプレーノズルをその散水方向に合わせて調整可能に配設)とを適宜調整して使用できる。
また、本発明における受水槽の下方部に設ける傾斜板は好ましくは傾斜角16°であるが、貝類と泥水と海水とを含む混合液の処理量に合わせた傾斜角を使用できる。また、本発明は火力発電所以外でも酸性洗浄排水が得られる事業所において利用できる。
【0006】
【発明の実施の形態】
次に本発明の実施の形態を図面に基づいて説明する。
図1は本発明の貝類の洗浄分離処理方法を示すブロック図、図2は本発明の貝類処理装置の概念図を示す。
図3は貝類の洗浄分離装置の斜視説明図、図4は同洗浄分離装置のシャワーリング装置に配設されるスプレー管とスプレーノズルの説明断面図を示す。図5は受水槽の斜視説明図を示す。
本発明の概略工程は図1に示すごとく火力発電所から定期的に剥奪回収が行われる貝類1を受水槽2に供給する。該受水槽2より搬送ポンプ(例えばコンクリートポンプ)3で貝類洗浄分離装置4に搬送される。
次に、該貝類洗浄分離装置4に搬送された貝類は上下多段配置の振動スクリーン上5に供給され、その上部より本発明に係る酸性洗浄排水Aを散水(シャワーリング)され貝殻と貝肉等の有機物(泥分、微細貝を含む)とに分離される。その後洗浄分離された貝殻は搬送コンベア(スクリュー式)6により搬送・脱水された後、袋詰され生石灰(CaO)、消石灰(Ca(OH2))等の良好なセメント原料として利用される。
【0007】
一方、分離された貝肉等及び有機物(泥分、微細貝含む)は洗浄排水受槽Dに貯蔵され、そこで浮遊する貝肉等はオーバーフロー管Eで一旦回収槽Fに集めた後、ポンプHにより排水貯槽Bに返還され、該排水貯槽Bで処理(BOD,COD低減化処理)される。また、酸性の酸性洗浄排水Aは排水貯槽Bへ導入される。
【0008】
前記の酸性洗浄排水Aは、火力発電所の空気予熱器又は電気集塵器の定期点検時に機器を淡水で洗浄したさいに得られるものであり、酸性(pH:2〜3)で金属成分として主にFeと炭素元素を含み、他に微量のNa、Mg、Ca、Al、Si、V、Ni等を含んでいる。排水貯槽B中の該酸性洗浄排水Aは洗浄分離装置4において貝類に散水され、貝肉等から生成するアンモニア等のアルカリ性悪臭物質を中和反応により無臭化及び貝殻表面に付着している塩分を除去する役割をはたす。
【0009】
前記の洗浄分離装置4は、図3に示すごとく貝類を載置する上下多段配置の振動スクリーン5(5a,5b)とシャワリング装置Cを組み合わせて構成されている。 また、前記の上下多段配置の振動スクリーン5(5a,5b)は水平方向への振動と上下方向への振動(例えば全振幅:約11mm)を可能とする。
該スクリーン5には、篩作用をもつ振動スクリーン板(ステンレス製パンチングメタル:3.13φ)を採用することも好ましい。
該振動スクリーン5は貝類の処理に応じて段数、振幅、篩口径を選定して用いることができる。また、前記のシャワーリング装置Cについては、振動スクリーン板5の上方位置に、図4に示すごとく、散水方向及び散水量・圧力を適宜変更調整できるスプレー管7((A)〜(C):7a,7b,7c)と多数のスプレーノズル8(8a,8b,8c)を備えている。
多数のスプレーノズル8a〜8c・・のうちの幾つか又は全部の向きを、スプレー管7a〜7c・・を少し回転することで、右下方又は左下方へ傾斜させ、ノズル8a〜8c・・から斜め下方へ酸性排水Aを噴出することによって洗浄と同時に貝殻を、例えば(B)のスプレー管7bを少し左へ回転してノズル8bを右下方へ向けることによって、右方に配設された搬送コンベア6方向への移動(移送)することができる。
なお、該スプレーノズル8a、8b・・は貝類の処理量に合わせて配置し本数及び散水方向等を調整する。
【0010】
搬送ポンプ3で送られた貝類を上下多段配置の振動スクリーン5に載置して、該貝類に振動及び篩作用を与えながら、その上からスプレー管7と多数のスプレーノズル8を備えたシャワーリング装置Cにより該酸性洗浄排水Aを連続的に散水して貝殻に上下動、左右動の反転等を付与し踊るように運動を与えながら貝類を均一的に洗浄して、該貝殻と貝肉等の有機物とに分離するとともに貝殻を低塩分化する。
また、貝殻に付着する貝肉の脱離により、貝殻と貝肉等の有機物(泥分、微細貝等)とに洗浄分離する。
【0011】
一方、図5に示すように、取水路から回収された貝類1と泥水と海水とを含む混合液が供給される。該受水槽2は飛散防止板9で覆われ、その下方部に貝類を自重移動する傾斜板10(傾斜角:10〜20°、好ましくは約16°:鋼板製)を配設される。なお、この傾斜板10の角度及び材料は貝類の処理量及び搬送速度に合わせて変更する。
【0012】
次に、図1に示すごとく貝類の洗浄分離装置4において洗浄分離された貝肉等の有機物(泥分、微細貝を含む)を含む洗浄後の排水は、該洗浄分離装置4の下部に配置された洗浄排水受槽Dに貯められた後、同受槽Dの上部に取り付けられたオーバーフロー管Eにより、その上澄み浮遊物である貝肉等はオーバーフロー管Eを通し回収槽Fに一時集め(集水槽の浸出水も回収)た後、ポンプHにより排水貯槽Bに返還され酸性洗浄排水Aとして再使用される。
【0013】
また、排水貯槽Bでは、空気爆気による生物学的処理(COD、BODの低減)がなされ、その下層液状物は凝集沈殿処理装置I(凝集槽と凝集沈殿槽と濃縮槽からなる)で汚泥が分離され、ついで脱水処理Jされ、そして固形物は袋詰めされ良好なセメント原料として使用される。また、この凝集沈殿処理装置Iで分離された排水は下水処理場に排出される。
【0014】
本発明によれば、以上のように腐敗臭の強い貝類の洗浄分離に、空気予熱器又は電気集塵器等を淡水で洗浄することにより生成される酸性でFe分・炭素(未燃料カーボン)分及び微量の他金属分等含む機器の酸性洗浄排水Aの酸が貝類に含まれる貝肉等から生成するアンモニア等のアルカリ性悪臭物質を中和反応で抑制する。また、Feと炭素(未燃カーボン)分及び微量の他金属元素が該化学反応を促進する触媒又は活性物として作用し、さらに無臭化の効果を高める。
【0015】
一方、洗浄分離装置4は、振動スクリーン5で貝類の篩及び上下動、左右動の反転運動とスプレーノズル8(シャワーリング装置C)での散水による貝類の貝殻と貝肉等の有機物との洗浄分離と貝殻の移送作用とを組み合わせたことによる貝殻の洗浄及び貝殻と貝肉等の有機物との分離化が良好に行なわれ、該貝殻の低塩化(脱塩)を促進する。この結果、得られた貝殻は良好なセメント原料への使用が可能となる。
【0016】
【発明の効果】
以上説明したように本発明によれば、下記のような優れた効果が得られる。
(1)従来の火力発電所における、取水路から回収した大量の生貝の埋め立て処分、又は焼却して有資源化する処理をなくし、本発明による貝類の洗浄分離処理方法により貝類をセメント原料に有効利用できる結果、埋め立て用地の確保の問題をなくし、また、悪臭等の公害問題の発生も大幅に低減される。
(2)貝類の洗浄分離処理において、火力発電所設備の洗浄処理で排出された酸性の酸性洗浄排水を利用し、スプレーノズル(シャワーリング)と振動スクリーンとを配備した洗浄分離装置とを用いることにより、貝類から発生する悪臭を大幅に抑制できる。また、同時に貝殻の低塩分化ができ良好なセメント原料等が得られる。
(3)貝類の前処理工程である受水槽に傾斜板を設けたことにより、貝類の前処理を容易にし、かつその設備費及び管理費も大幅に低減できた。
【図面の簡単な説明】
【図1】図1は本発明の貝類の洗浄分離処理方法を示すブロック図である。
【図2】図2は本発明の貝類処理装置の概念図を示す。
【図3】図3は貝類の洗浄分離装置の斜視説明図を示す。
【図4】図3に示す洗浄分離装置のシャワーリング装置に配設されるスプレー管とスプレーノズルの説明断面図を示す。
【図5】受水槽の斜視説明図を示す。
【符号の説明】
A 空気予熱器・電気集塵器の酸性洗浄排水
B 排水貯槽
C シャワーリング装置
D 洗浄排水受槽
E オーバーフロー管
F 回収槽
G 集水槽
H ポンプ
I 凝集沈殿処理装置
J 脱水処理
1 取水路から回収された貝類
2 受水槽
3 搬送ポンプ(コンクリートポンプ)
4 洗浄分離装置
5 振動スクリーン
6 搬送コンベア
7(7a、7b、7c) スプレー管
8(8a、8b,8c) スプレーノズル
9 飛散防止板
10 傾斜板[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to washing and separation of shellfish, and in a thermal power plant, deodorizing and lowering salt content of shells by washing and separating shellfish collected from a seawater intake channel into shells and organic substances such as shellfish with acidic equipment washing drainage. The present invention relates to a method for treating shellfish to obtain a good cement raw material and the like.
[0002]
Problems to be solved by the prior art and the invention
Conventionally, in thermal power plants, seawater is introduced and used through the intake channel as cooling water for the condenser of the power generation facility, but shells such as mussels and barnacles grow and adhere to the bottom side of the channel, and the water flow resistance is reduced. The shellfish must be peeled and removed on a regular basis in order to increase the number of shells or cause problems such as shells that have flowed off after being partially peeled off and clogged with cooling pipes of the power plant. The annual amount of shellfish removed from this intake channel reaches hundreds of tons at a thermal power plant, and a large amount of shellfish is removed. Most of the removed shellfish were landfilled or incinerated to turn them into resources.However, in recent years, the revision of the Waste Disposal and Public Cleansing Law has strengthened the structure of the landfill disposal site, which has become an issue. I'm familiar.
[0003]
On the other hand, recently, it has been considered that the shellfish can be effectively used as a concrete material (cement raw material, admixture, aggregate) in the construction and civil engineering fields. Since rusting is promoted, the development of low-salt differentiation technology for shellfish used as a raw material for cement and concrete has been an issue.
[0004]
[Means for Solving the Problems]
In view of the above circumstances, the present inventors have conducted intensive research to promote the effective use of shellfish attached to the intake channel of a thermal power plant, to make the shell odorless, and to provide cement raw materials and the like by low salt differentiation. The present invention has been made.
(1) Spray the shellfish recovered from the intake channel of the thermal power plant with acidic cleaning wastewater, which is the cleaning wastewater of the air preheater or electric precipitator of the thermal power plant equipment, to convert it into organic matter such as shells and shell meat. A method for treating shellfish recovered from an intake channel of a thermal power plant, comprising washing and separating.
(2) The shellfish collected from the thermal power plant intake channel is placed on a vibrating screen in a multi-stage arrangement, and the acid washing wastewater, which is the washing wastewater for the air preheater or electric precipitator of the thermal power plant equipment, is placed on top of it. A method for treating shellfish recovered from an intake channel of a thermal power plant, wherein the shellfish is sprayed and washed and separated into shells and organic matter such as shellfish.
(3) Multi-stage vibrating screen for placing shells recovered from the intake channel of the thermal power plant, and from above the acid cleaning drainage, which is the cleaning drainage of the air preheater or electric precipitator of the thermal power plant equipment And a showering device for washing and separating shellfish into shells and organic matter such as shellfish by sprinkling acidic washing wastewater, comprising a showering device for spraying water. Processing equipment for shellfish collected from Japan.
(4) A shellfish washing / separation device for washing and separating shellfish into organic matter such as shells and shellfish by sprinkling of acidic washing wastewater, consisting of a vibrating screen arranged vertically in multiple stages and a showering device equipped with a
(5) Shellfish recovered from the intake channel of a thermal power plant as described in (3) or (4) above, wherein the vibrating screen having a vertically arranged multistage is capable of vibrating in a horizontal direction and in a vertical direction. Processing equipment.
(6) The shellfish collected from the intake channel of a thermal power plant according to any one of (3) to (5) above, wherein the showering device is provided with a spray nozzle capable of changing and adjusting a watering direction. Processing equipment.
(7) A water receiving tank is provided in front of the shellfish washing / separating device to which a mixed solution containing shellfish, muddy water and seawater recovered from the intake channel is supplied, and the water receiving tank is provided with an inclined plate below. 7. The apparatus for treating shellfish collected from the intake channel of a thermal power plant according to any one of the
(8) The intake channel for a thermal power plant according to any one of (3) to (7) above, wherein a washing drainage receiving tank is disposed below the shellfish washing / separating apparatus, and an overflow pipe is attached to the receiving tank. Processing equipment for shellfish collected from Japan.
[0005]
The acidic washing wastewater discharged from the thermal power plant used in the present invention is a washing wastewater discharged by washing an air preheater or an electric dust collector of the thermal power plant equipment with water, and is acidic (pH: In (2) to (3), it mainly contains Fe and a carbon element as metal components, and also contains trace amounts of Na, Mg, Ca, Al, Si, V, Ni, and the like.
Conventionally, the acidic washing wastewater is discharged through a wastewater treatment device after being subjected to neutralization treatment and solid-liquid separation treatment.
In addition, the washing and separating apparatus of the present invention comprises a vibrating screen and a showering apparatus (a number of spray nozzles are arranged in a spray pipe in a manner that can be adjusted in accordance with the direction of water spray) in a multi-stage arrangement in accordance with the throughput and processing speed of shellfish. ) Can be appropriately adjusted for use.
In addition, the inclined plate provided in the lower part of the water receiving tank in the present invention preferably has an inclination angle of 16 °, but an inclination angle that matches the processing amount of a mixed solution containing shellfish, muddy water and seawater can be used. In addition, the present invention can be used in establishments other than thermal power plants that can obtain acidic washing wastewater.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a method for washing and separating shellfish of the present invention, and FIG. 2 is a conceptual diagram of a shellfish processing apparatus of the present invention.
FIG. 3 is a perspective explanatory view of a washing and separating apparatus for shellfish, and FIG. 4 is an explanatory sectional view of a spray pipe and a spray nozzle provided in a showering device of the washing and separating apparatus. FIG. 5 shows a perspective explanatory view of the water receiving tank.
In the schematic process of the present invention, as shown in FIG. 1, shellfish 1 that is periodically deprived and collected from a thermal power plant is supplied to a water receiving
Next, the shellfish conveyed to the shellfish washing / separating
[0007]
On the other hand, the separated shell meat and the like and the organic matter (including mud and fine shellfish) are stored in the washing and drainage receiving tank D, and the shell meat and the like floating there are once collected in the collecting tank F by the overflow pipe E and then pumped by the pump H. The water is returned to the drainage storage tank B, and is processed in the drainage storage tank B (BOD and COD reduction processing). Further, the acidic washing wastewater A is introduced into the wastewater storage tank B.
[0008]
The acidic washing wastewater A is obtained when the equipment is washed with fresh water at the time of periodic inspection of an air preheater or an electric dust collector of a thermal power plant, and is acidic (pH: 2-3) as a metal component. It mainly contains Fe and carbon elements, and also contains trace amounts of Na, Mg, Ca, Al, Si, V, Ni and the like. The acidic washing wastewater A in the wastewater storage tank B is sprinkled with shellfish in the washing /
[0009]
As shown in FIG. 3, the washing /
It is also preferable to employ a vibrating screen plate (stainless steel punching metal: 3.13φ) having a sieve action as the screen 5.
The number of stages, amplitude, and sieve diameter of the vibrating screen 5 can be selected and used according to the processing of shellfish. As for the showering device C, as shown in FIG. 4, a spray pipe 7 ((A) to (C)) capable of appropriately changing and adjusting a watering direction and a watering amount / pressure at a position above the vibrating screen plate 5. 7a, 7b, 7c) and a number of spray nozzles 8 (8a, 8b, 8c).
By slightly rotating the spray pipes 7a to 7c, the directions of some or all of the many spray nozzles 8a to 8c are inclined downward or downward to the right or left, and from the nozzles 8a to 8c. By transporting the shells simultaneously with washing by ejecting the acidic wastewater A obliquely downward, for example, by slightly rotating the spray pipe 7b of (B) to the left and turning the nozzle 8b downward and to the right, the transport provided on the right It can move (transfer) in the direction of the conveyor 6.
The spray nozzles 8a, 8b,... Are arranged in accordance with the amount of shellfish to be treated, and the number and direction of water spray are adjusted.
[0010]
The shellfish sent by the
Further, by the detachment of the shell meat adhering to the shell, the shell is washed and separated into organic substances (mud, fine shellfish, etc.) such as shell.
[0011]
On the other hand, as shown in FIG. 5, a mixed solution containing the shellfish 1, muddy water and seawater collected from the intake channel is supplied. The
[0012]
Next, as shown in FIG. 1, the washed wastewater containing organic substances (including mud and fine shellfish) such as shellfish washed and separated in the shellfish washing /
[0013]
In the drainage storage tank B, biological treatment (reduction of COD and BOD) is performed by air bombardment, and the lower layer liquid is sludge treated by the coagulation sedimentation treatment apparatus I (condensation tank, coagulation sedimentation tank, and concentration tank). Is separated and then dewatered, and the solids are bagged and used as a good cement material. The wastewater separated by the coagulation-sedimentation treatment apparatus I is discharged to a sewage treatment plant.
[0014]
According to the present invention, for the washing and separation of the shellfish having a strong putrefaction odor as described above, the acidic Fe component / carbon (unfueled carbon) generated by washing the air preheater or the electric dust collector with fresh water. The acid of the acidic washing wastewater A of equipment containing minute amounts and trace amounts of other metals, etc., suppresses the alkaline malodorous substances such as ammonia generated from shellfish and the like contained in the shellfish by a neutralization reaction. Further, Fe, carbon (unburned carbon) and a trace amount of other metal elements act as a catalyst or an active substance for promoting the chemical reaction, and further enhance the deodorizing effect.
[0015]
On the other hand, the washing /
[0016]
【The invention's effect】
As described above, according to the present invention, the following excellent effects can be obtained.
(1) Eliminating the conventional landfill disposal or incineration of large quantities of raw shellfish recovered from intake channels in conventional thermal power plants to convert them into resources, and the shellfish washing and separation method according to the present invention enables shellfish to be used as a cement raw material. As a result, the problem of securing a landfill site is eliminated, and the occurrence of pollution problems such as bad smell is greatly reduced.
(2) In the washing and separating process of shellfish, a washing and separating device provided with a spray nozzle (shower ring) and a vibrating screen is used by utilizing the acidic washing water discharged from the washing of the thermal power plant equipment. Thereby, the bad odor generated from the shellfish can be significantly suppressed. At the same time, the shell can be differentiated with low salt, and a good cement raw material can be obtained.
(3) The provision of the inclined plate in the water receiving tank, which is a pretreatment step for shellfish, facilitated the pretreatment of shellfish, and also greatly reduced equipment costs and management costs.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a method for washing and separating shellfish of the present invention.
FIG. 2 shows a conceptual diagram of a shellfish processing apparatus of the present invention.
FIG. 3 is a perspective explanatory view of a washing and separating apparatus for shellfish.
FIG. 4 is an explanatory sectional view of a spray pipe and a spray nozzle provided in a showering device of the washing / separating device shown in FIG. 3;
FIG. 5 shows a perspective explanatory view of a water receiving tank.
[Explanation of symbols]
A Acid washing drainage of air preheater / electric precipitator B Drainage storage tank C Shower ring device D Washing drainage receiving tank E Overflow pipe F Recovery tank G Water collecting tank H Pump I Coagulation sedimentation treatment equipment J Dehydration treatment 1 Dewatering treatment 1
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000208806A JP3598950B2 (en) | 2000-07-10 | 2000-07-10 | Method and apparatus for treating shellfish recovered from intake channel of thermal power plant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000208806A JP3598950B2 (en) | 2000-07-10 | 2000-07-10 | Method and apparatus for treating shellfish recovered from intake channel of thermal power plant |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2002018418A JP2002018418A (en) | 2002-01-22 |
JP3598950B2 true JP3598950B2 (en) | 2004-12-08 |
Family
ID=18705324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000208806A Expired - Fee Related JP3598950B2 (en) | 2000-07-10 | 2000-07-10 | Method and apparatus for treating shellfish recovered from intake channel of thermal power plant |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3598950B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4866595B2 (en) * | 2005-12-09 | 2012-02-01 | 財団法人電力中央研究所 | Method and apparatus for treating deposits such as shellfish |
-
2000
- 2000-07-10 JP JP2000208806A patent/JP3598950B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2002018418A (en) | 2002-01-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2001015826A1 (en) | Sewage treatment apparatus | |
TWI537066B (en) | Method and apparatus for the removal of contaminants from organic waste | |
KR101417277B1 (en) | Device to cohere and to dispose of wastes water | |
CN108911461A (en) | A kind of mercury object original position abatement disposition ship | |
AU688480B2 (en) | An apparatus and method for purifying water | |
JP3598950B2 (en) | Method and apparatus for treating shellfish recovered from intake channel of thermal power plant | |
EP0950639A1 (en) | An apparatus and method for purifying water | |
US5770092A (en) | Apparatus and method for purifying water | |
KR101156021B1 (en) | Processing apparatus for wastewater treatment | |
JPH07309645A (en) | Method for washing shell for cement stock | |
JPH04215811A (en) | Treatment apparatus for separating at least artificial and natural fibers in night soil or sewage water | |
JPS58101745A (en) | Method and device for separating waste material containing sand | |
TWI243155B (en) | Purifying method for leachate in closed-type landfill | |
KR101749521B1 (en) | Sewage disposal method | |
CN108892327A (en) | A kind of environment-friendly type industrial waste water purifying device | |
JP3759523B2 (en) | Livestock wastewater treatment method and apparatus | |
JP2003080299A (en) | Method of treating sludge | |
RU2133712C1 (en) | Sewage water cleaning method | |
JP2002177989A (en) | Night soil treatment equipment | |
CN215559479U (en) | Salt-washing waste brine recycling facility | |
CN108751633A (en) | A kind of mud purifier of water environment treatment | |
JPH11267416A (en) | Multistage device and method for continuous waste water filtration | |
JP3707585B2 (en) | Method and apparatus for treating deposits on intake channel | |
JPS6014508Y2 (en) | Sewage screen residue treatment equipment | |
KR20080097641A (en) | Absorption type apparatus for the treatment of food waste leachate |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20040729 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20040824 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20040906 |
|
R150 | Certificate of patent or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070924 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080924 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080924 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090924 Year of fee payment: 5 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100924 Year of fee payment: 6 |
|
LAPS | Cancellation because of no payment of annual fees |