JPH07309645A - Method for washing shell for cement stock - Google Patents
Method for washing shell for cement stockInfo
- Publication number
- JPH07309645A JPH07309645A JP6124567A JP12456794A JPH07309645A JP H07309645 A JPH07309645 A JP H07309645A JP 6124567 A JP6124567 A JP 6124567A JP 12456794 A JP12456794 A JP 12456794A JP H07309645 A JPH07309645 A JP H07309645A
- Authority
- JP
- Japan
- Prior art keywords
- shellfish
- washing
- raw material
- tank
- stirring
- 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.)
- Pending
Links
- 238000005406 washing Methods 0.000 title claims abstract description 60
- 239000004568 cement Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 235000015170 shellfish Nutrition 0.000 claims description 121
- 239000002994 raw material Substances 0.000 claims description 41
- 238000004140 cleaning Methods 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 27
- 238000000926 separation method Methods 0.000 claims description 16
- 235000013372 meat Nutrition 0.000 claims description 12
- 239000004576 sand Substances 0.000 claims description 12
- 238000011033 desalting Methods 0.000 claims description 9
- 238000007654 immersion Methods 0.000 claims description 8
- 238000013019 agitation Methods 0.000 claims description 5
- 238000010612 desalination reaction Methods 0.000 claims description 5
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 238000007598 dipping method Methods 0.000 claims description 4
- 239000013505 freshwater Substances 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 claims 1
- 150000003839 salts Chemical class 0.000 abstract description 20
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract description 2
- 235000019738 Limestone Nutrition 0.000 abstract 1
- 239000006028 limestone Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 241000237502 Ostreidae Species 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 235000020636 oyster Nutrition 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 239000013535 sea water Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241000238586 Cirripedia Species 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 2
- 241000237536 Mytilus edulis Species 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009965 odorless effect Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005115 demineralization Methods 0.000 description 1
- 230000002328 demineralizing effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000003578 releasing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- -1 that is Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Landscapes
- Cleaning By Liquid Or Steam (AREA)
- Processing Of Solid Wastes (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、セメント原料用貝ガラ
の洗浄方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning shellfish shellfish for cement raw material.
【０００２】[0002]
【従来の技術】一般に、発電所の海水取水路に付着し成
長したムラサキイガイ、フジツボ等の貝類は、定期的に
清掃されて大量（例えば、１回当り１０００ton ）に廃
棄される。また、カキ養殖産地では、カキガラが大量に
廃棄される。2. Description of the Related Art Generally, shellfish such as blue mussels and barnacles that have adhered to and grow in the seawater intake channel of a power plant are regularly cleaned and discarded in large quantities (for example, 1000 tons per time). In addition, a large amount of oysters are discarded in the oyster farming area.
【０００３】これらの貝ガラは本来、清浄無臭な無機
質、すなわち、炭酸カルシウムであることから、これを
利用することが提案されている（例えば、特開昭５７−
１６６３５８号公報、、特開平３−１６５８８１号公報
等参照）。本出願人も、特公昭６３−６５３９１号公報
や、特公平１−１９９５６号公報によってこの種の貝ガ
ラをカルシウム源として有効に利用することを提唱して
いる。Since these shellfish are essentially clean and odorless inorganic substances, that is, calcium carbonate, it has been proposed to utilize them (see, for example, JP-A-57-57).
166358, Japanese Patent Laid-Open No. 3-165881, etc.). The present applicant also proposes to effectively use this type of shellfish as a calcium source in Japanese Patent Publication No. 63-65391 and Japanese Patent Publication No. 1-19956.
【０００４】すなわち、本発明者らは、貝ガラの有効利
用のための前処理として、先ず、次の３つの基本処理工
程に着目した。 洗浄分級工程（原料貝類を洗浄、破砕後、貝肉等の腐
敗成分を分級除去し、清浄無臭で有効利用可能な洗浄貝
として回収する工程） 水処理工程（前記の工程で発生した洗浄排水から汚
泥成分を回収・浄化して放流する工程） 安定化工程（前記の工程で分級した貝肉や汚泥を
安定化する工程）That is, the present inventors first focused on the following three basic treatment steps as a pretreatment for effectively utilizing shellfish. Washing and classifying process (process of washing and crushing raw shellfish, classifying and removing putrefaction components such as shell meat, and collecting as clean and odorless and effectively usable washed shellfish) Water treatment process (from washing wastewater generated in the above process Stabilization process (process to collect and purify sludge components and discharge them) (process to stabilize shell meat and sludge classified in the above process)
【０００５】ところで、前掲の公報等において本出願人
は、かかる基本処理工程におけるの洗浄分級工程の貝
ガラの洗浄方法について、次のように提案している。By the way, in the above-mentioned publications, the present applicant proposes the following method of cleaning shellfish in the cleaning and classifying step in the basic processing step.
【０００６】図４において、海水取水路清掃時に回収さ
れたヘドロ等を含む貝類を、水切りした状態で貯蔵ホッ
パ−１に投入し、コンベア２により予め設定された供給
量にしたがって攪拌洗浄タンク３に供給する。この攪拌
洗浄タンク３では、満水の洗浄水が攪拌機４により攪拌
されているので、供給された貝類等は洗浄水で洗浄され
ると共に、貝類とヘドロ等とを遊離するよう攪拌され
る。In FIG. 4, shellfish containing sludge and the like collected at the time of cleaning the seawater intake channel are put into the storage hopper-1 in a drained state, and then transferred to the stirring and washing tank 3 according to a supply amount preset by the conveyor 2. Supply. In the agitation washing tank 3, the full-flush washing water is agitated by the agitator 4, so that the supplied shellfish and the like are washed with the wash water and agitated so as to release the shellfish and sludge.
【０００７】次いで、洗浄水で洗浄された貝類等を、破
砕ポンプ５により吸引し、かつ、細かく破砕して遊離効
果を高める。このとき、貝ガラと貝肉とが遊離する。こ
の破砕ポンプ５を出た貝類等は汚濁水と共に液体サイク
ロン６に供給され、比重大の貝ガラと、比重小の貝肉と
に分級され、汚濁水と共にオ−バ−フロ−およびアンダ
−フロ−から排出される。液体サイクロン６のオ−バ−
フロ−から排出された貝肉等は、前記攪拌洗浄タンク３
に連設したスカム（貝肉）スクリ−ン７にかけられ、脱
水し、貝肉や藻類等の有機固形物をＡのように回収す
る。Next, shellfish and the like washed with washing water are sucked by the crushing pump 5 and finely crushed to enhance the releasing effect. At this time, shellfish and shellfish are released. The shellfish and the like discharged from the crushing pump 5 are supplied to a hydrocyclone 6 together with polluted water, and are classified into shellfish of specific gravity and shell meat of small specific gravity, and together with the polluted water, overflow and underflow. -Is discharged from. Hydro cyclone 6 over
The shellfish and the like discharged from the flow are the agitating and washing tank 3
It is sprinkled on a scum (shell meat) screen 7 connected to the above and dehydrated, and organic solids such as shell meat and algae are collected like A.
【０００８】一方、液体サイクロン６のアンダ−フロ−
から排出された貝ガラと汚濁水は、砂沈澱タンク８にお
ける清澄水９が接線方向に供給されて旋回流となってい
る渦流分離タンク（特開平４−３１０２４７号公報参
照）１０に供給される。この渦流分離タンク１０では、
いわゆるサイクロン作用によって貝ガラ等は下方に沈降
しながら洗浄される。沈降した貝ガラは、攪拌機能をも
つスクリュ−コンベア１１によって振動スクリ−ン１２
へ供給される。On the other hand, the underflow of the hydrocyclone 6
The shellfish and polluted water discharged from the tank are supplied to a swirl separation tank (see Japanese Patent Laid-Open No. 4-310247) 10 in which the clear water 9 in the sand settling tank 8 is supplied tangentially to form a swirling flow. . In this vortex separation tank 10,
Due to the so-called cyclone action, shellfish etc. are washed while settling downward. The settled shellfish is vibrated by a screw conveyor 11 having a stirring function to a vibration screen 12
Is supplied to.
【０００９】この振動スクリ−ン１２では、前記砂沈澱
タンク８における清澄水９や、新しい水道水Ｂがジエッ
ト散水されて、破砕された貝ガラを洗浄すると共に、脱
砂・脱水を行う。この破砕された洗浄済の貝ガラは、遠
心脱水機１３にかけられ、更に脱水されて目的の洗浄破
砕貝Ｃが得られる。なお、Ｄは砂・細破砕貝を示し、ま
た、この洗浄プラントの排水はポンプＰ2によって前記
の水処理工程へ送水される。In this vibrating screen 12, the clear water 9 in the sand settling tank 8 and fresh tap water B are jet-jetted to wash the crushed shellfish and desand and dewater. This crushed and washed shellfish is put to a centrifugal dehydrator 13 and further dehydrated to obtain the target washed and crushed shellfish C. In addition, D shows sand and shredded shellfish, and the drainage of this washing plant is sent to the above-mentioned water treatment process by the pump P 2 .
【００１０】ところで、一般のコンクリ−トにおいて
は、鉄筋コンクリ−トに用いる骨材用砂に塩分が付着し
ていると、鉄筋の発錆が促進されたり、コンクリ−トの
長期強度が伸びなかったり、乾燥収縮率が若干大になっ
たりして、コンクリ−トにおける塩分の含有率はきわめ
て重要な問題になっている。By the way, in general concrete, if salt is attached to the aggregate sand used for the reinforcing bar concrete, rusting of the reinforcing bar is promoted and the long-term strength of the concrete does not increase. In addition, the content of salt in the concrete has become a very important problem because the drying shrinkage rate is slightly increased.
【００１１】例えば、骨材用砂に塩分が多く付着してい
ると、鉄筋コンクリ−ト壁は１０〜１５年後には、亀裂
が発生し、崩壊し易くなってビルやトンネルの内壁が落
下する、という問題があった。したがって、建設省の通
達では、骨材用の海砂の塩分は、０．０４％以下に脱塩
することを原則にしている。そのため、前記洗浄破砕貝
についても、これをセメント原料に用いる場合には、更
に厳格な塩分の制限が考えられ、例えば、５０ｍｇ／ｋ
ｇ以下にすることが望ましい、とされている。For example, if a large amount of salt adheres to the aggregate sand, the reinforcing steel concrete wall will crack after 10 to 15 years and will easily collapse, causing the inner wall of the building or tunnel to fall. , There was a problem. Therefore, the Ministry of Construction has a general rule that the salt content of aggregate sea sand should be desalted to 0.04% or less. Therefore, even when the washed and crushed shellfish is used as a cement raw material, stricter limitation of salt content may be considered, and for example, 50 mg / k.
It is said that it is desirable to set it to g or less.
【００１２】ところで、本出願人が提案した前掲の公報
では、液体サイクロン６のアンダ−フロ−から排出され
た貝ガラと汚濁水は、単なる分離タンクに供給して貝ガ
ラのみを取出していたが、かかる貝ガラの脱塩では、セ
メント原料の脱塩水準には到底達せられず、そのため本
出願人は、図４のように分離タンクを渦流分離タンクに
改善したり、貝ガラ用の散水振動スクリ−ンを設けたり
して、貝ガラを何とかセメント原料にしようと鋭意努力
を重ねた。[0012] By the way, in the above-mentioned publication proposed by the present applicant, the shellfish and the polluted water discharged from the underflow of the liquid cyclone 6 are simply supplied to the separation tank to take out only the shellfish. With such desalination of shellfish, the desalination level of the cement raw material cannot be reached at all, and therefore the applicant improved the separation tank to a vortex separation tank as shown in FIG. 4 or sprinkling vibration for shellfish. I put in a screen and worked hard to make the shellfish a raw material for cement.
【００１３】しかしながら、前記図４で示した貝ガラの
洗浄方法により得られた洗浄破砕貝を分析すると、洗浄
プラント１パスの洗浄では、５０ｍｇ／ｋｇ以下にする
ことはできず、２パスの洗浄により漸く５０ｍｇ／ｋｇ
以下に達成できた。したがって、図４で示す洗浄方法で
は、洗浄時間が約倍増し、使用動力も倍増することから
セメント原料がコストアップになる、という問題があっ
た。However, when the washed and crushed shellfish obtained by the method for washing shellfish shown in FIG. 4 is analyzed, it cannot be reduced to 50 mg / kg or less in one pass of the washing plant, and two passes are washed. 50mg / kg
We were able to achieve the following: Therefore, the cleaning method shown in FIG. 4 has a problem that the cleaning time is approximately doubled and the power used is also doubled, resulting in an increase in cost of the cement raw material.
【００１４】[0014]
【課題を解決するための手段】そこで本発明は、かかる
問題を解決するためになされたもので、その要旨とする
ところは、１）大量に廃棄された原料貝類を、洗浄水に
よる洗浄工程により脱貝肉、脱塩、脱砂および脱水して
セメント原料用貝ガラを連続的に生産する方法におい
て、前記洗浄に用いた回収水を常時、流下させている浸
漬タンクに、前記原料貝類を供給して所定の時間浸漬し
ながら連続的に排出し、続けて、これを前記洗浄工程に
連続供給することを特徴とするセメント原料用貝ガラの
洗浄方法にあり、また、２）大量に廃棄された原料貝ガ
ラを、洗浄水による洗浄工程により脱塩、脱砂および脱
水してセメント原料用貝ガラを連続的に生産する方法に
おいて、前記洗浄に用いた回収水を常時、流下させてい
る浸漬タンクに、前記原料貝ガラを供給して所定の時間
浸漬しながら連続的に排出し、続けて、これを前記攪拌
洗浄タンクに連続供給することを特徴とするセメント原
料用貝ガラの洗浄方法にあり、また、３）大量に廃棄さ
れた原料貝類を、攪拌洗浄タンク、破砕ポンプ、分級
機、散水洗浄スクリ−ンおよび脱水機の順に通して、脱
貝肉、脱塩、脱砂および脱水してセメント原料用貝ガラ
を連続的に生産する方法において、前記攪拌洗浄タンク
の上流側に浸漬タンクを設け、該浸漬タンクに、前記攪
拌洗浄タンクで用いた洗浄水を常時、流下させると共
に、前記原料貝類を供給して所定の時間浸漬しながら連
続的に排出し、続けて、これを前記攪拌洗浄タンクに連
続供給することを特徴とするセメント原料用貝ガラの洗
浄方法にあり、また、４）大量に廃棄された原料貝類
を、攪拌洗浄タンク、破砕ポンプ、分級機、渦流分離タ
ンク、散水洗浄スクリ−ンおよび脱水機の順に通して、
脱貝肉、脱塩、脱砂および脱水してセメント原料用貝ガ
ラを連続的に生産する方法において、前記攪拌洗浄タン
クの上流側に浸漬タンクを設け、該浸漬タンクに、前記
攪拌洗浄タンクで用いた洗浄水を常時、流下させると共
に、前記原料貝類を供給して所定の時間浸漬しながら連
続的に排出し、続けて、これを前記攪拌洗浄タンクに連
続供給し、しかも、前記分級機と渦流分離タンクとの間
に水切専用スクリ−ンを設けて破砕貝ガラから汚濁水を
水切りした後、該破砕貝ガラを清水のみにより、前記渦
流分離タンクで渦流洗浄した後、前記散水洗浄スクリ−
ンで散水洗浄することを特徴とするセメント原料用貝ガ
ラの洗浄方法にある。The present invention has been made in order to solve the above problems, and the gist of the present invention is as follows: 1) A large amount of discarded raw material shellfish is washed with washing water. In the method of continuously producing shellfish shellfish for cement raw material by removing shellfish meat, desalting, sand removal and dehydration, the raw material shellfish is supplied to a dipping tank in which the recovered water used for the washing is constantly flowing down. Then, the method is a method for cleaning a shellfish shell for cement raw material, characterized in that it is continuously discharged while being immersed for a predetermined time, and then continuously supplied to the cleaning step. In the method for continuously producing shellfish for cement raw material by desalting, desanding and dehydrating the raw material shellfish in a washing process with washing water, the recovered water used for the washing is constantly allowed to flow down. In front of the tank The raw material shellfish is fed and continuously discharged while being dipped for a predetermined time, and continuously, in the method for cleaning cement raw material shellfish, which is characterized by continuously supplying it to the stirring washing tank, and, 3) A large amount of discarded raw material shellfish is passed through an agitation washing tank, a crushing pump, a classifier, a sprinkling washing screen, and a dehydrator in this order to remove shellfish meat, desalting, desanding, and dehydrating it for a cement raw material. In a method for continuously producing shellfish, an immersion tank is provided on the upstream side of the stirring and washing tank, and the washing water used in the stirring and washing tank is constantly allowed to flow down to the immersion tank and the raw material shellfish is supplied. Then, it is continuously discharged while soaking for a predetermined time, and then continuously supplied to the stirring and washing tank, which is a method for washing shellfish for cement raw material. Done Raw shellfish, stirred wash tank, crushing pump, classifier, vortex separation tank, sprinkler washed subscription - through a sequence of emissions and dehydrators,
In a method for continuously producing shellfish for cement raw material by demineralization, desalting, desanding and dehydration, an immersion tank is provided on the upstream side of the stirring and washing tank, and the stirring and washing tank is provided with the stirring and washing tank. The washing water used is always allowed to flow down, and the raw material shellfish is supplied and continuously discharged while being immersed for a predetermined time, and continuously supplied to the agitation washing tank, and further, with the classifier. A screen for exclusive use of draining is provided between the vortex separation tank to drain the contaminated water from the crushed shellfish, and the crushed shellfish is vortexed and washed in the vortex separation tank only with fresh water, and then the sprinkling cleaning screen is used.
It is a method for cleaning shellfish shellfish for cement, which is characterized in that it is washed with water.
【００１５】[0015]
【実施例】本発明を添付図面に示す実施例により詳細に
述べる。図１は本発明の実施例の貝ガラ洗浄方法を示す
ブロック図、図２および図３は図１における実施装置の
部分概念図を示す。なお、図１の本発明の実施例の洗浄
方法と図４の従来例の洗浄方法との共通する部分は同一
符号を付したり、省略したりするので、図１のブロック
図を実施する装置の概念図は示していない。The present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a block diagram showing a shellfish cleaning method according to an embodiment of the present invention, and FIGS. 2 and 3 are partial conceptual views of the embodying apparatus in FIG. It should be noted that parts common to the cleaning method of the embodiment of the present invention in FIG. 1 and the cleaning method of the conventional example in FIG. Does not show a conceptual diagram of.
【００１６】本発明の実施例は、火力または原子力発電
所における復水器用冷却水を取水するための水路に付着
しているムラサキイガイおよびフジツボ等の混合貝（以
下、貝類という）をセメント原料に供するため、これら
の貝類の貝ガラを洗浄する方法に好適であるが、カキ養
殖産地におけるカキガラの洗浄方法にも適用できる。In the embodiment of the present invention, mixed shellfish (hereinafter referred to as shellfish) such as blue mussels and barnacles attached to a water channel for collecting condenser cooling water in a thermal power plant or a nuclear power plant is used as a cement raw material. Therefore, it is suitable for the method for washing the shellfish of these shellfish, but it can also be applied to the method for washing the oyster in the oyster cultivation area.
【００１７】本実施例の洗浄方法の概要を、先ず従来技
術にしたがって述べる。海水取水路の定期清掃によって
集められた貝類（細砂、金属小片、藻類等も含む）は、
直ちに本実施例の貝ガラ洗浄プラント（例えば、貝類処
理３ton ／ｈｒ、得られる洗浄破砕貝ガラ２．１ton ／
ｈｒの規模）で処理するため、野積の貝ガラ（１０００
〜１５００ｍｇ／ｋｇの塩分付着量）に比べ、高い濃度
（約７５００ｍｇ／ｋｇ）の塩分が付着している。かか
る塩分高濃度の生の貝類等は、予めクラッシャ等で荒砕
され、かつ、脱水されて攪拌洗浄タンク３に投入され
る。ここでは、攪拌機４により攪拌しながら洗浄する。
このときの洗浄水は、後記の砂沈澱タンク８の清澄水が
使われ、更に、この攪拌洗浄タンク３では、金属小片や
砂が最底部に沈降するので、これを間欠的に取出すよう
にしている。First, an outline of the cleaning method of this embodiment will be described according to the prior art. Shellfish (including fine sand, small metal pieces, algae, etc.) collected by regular cleaning of the seawater intake
Immediately after, the shellfish cleaning plant of this example (for example, shellfish treatment 3 ton / hr, the obtained washed and crushed shellfish 2.1 ton / hour)
Because it is processed at the scale of hr, Nogami's shellfish (1000
The salt concentration is higher (about 7500 mg / kg) than that of ˜1500 mg / kg. The raw shellfish or the like having a high salt concentration is roughly crushed in advance by a crusher or the like, dehydrated, and put into the stirring and washing tank 3. Here, washing is performed while stirring with the stirrer 4.
As the cleaning water at this time, the clear water in the sand settling tank 8 described later is used, and further, in this stirring and cleaning tank 3, since metal pieces and sand settle to the bottom, it should be taken out intermittently. There is.
【００１８】このように洗浄水で洗浄された貝類等は、
破砕ポンプ（格子状板体とカッタ−との組合せポンプ）
５によって細かく破砕されて、液体サイクロン（分級機
ともいう）６に導入される。この液体サイクロン６のア
ンダ−フロ−から排出された全体の約２０％に相当する
破砕貝ガラと汚濁水とは全量、渦流分離タンク１０に供
給される。ここでも、洗浄水がタンク接線方向に圧送さ
れているので、サイクロン作用を受け、重量別に分級さ
れる。そして、貝ガラ等の重量物は、スクリュ−コンベ
ア１１によって振動スクリ−ン（散水洗浄スクリ−ンと
もいう）１２の上流側の表面に供給される。この振動ス
クリ−ン１２で洗浄、脱砂および脱水された破砕貝ガラ
は、遠心脱水機（単に脱水機ともいう）１３にかけら
れ、完全に脱水される。以上の工程は従来技術と同じで
ある。The shellfish etc. thus washed with the washing water are
Crushing pump (combination pump of grid plate and cutter)
It is finely crushed by 5 and introduced into a hydrocyclone (also referred to as a classifier) 6. About 20% of the whole discharged from the underflow of the liquid cyclone 6 and the polluted water corresponding to about 20% of the whole are supplied to the swirl separation tank 10. Also here, since the wash water is pumped in the tangential direction of the tank, it undergoes a cyclone action and is classified by weight. Then, heavy materials such as shellfish are supplied to the upstream surface of the vibration screen (also referred to as a water spray cleaning screen) 12 by the screw conveyor 11. The crushed shellfish that have been washed, desanded and dehydrated by the vibration screen 12 are put into a centrifugal dehydrator (also simply referred to as dehydrator) 13 and completely dehydrated. The above steps are the same as in the prior art.
【００１９】ここにおいて、本実施例では、図１のブロ
ック図において、点線で囲った２つの工程を追加して、
更に塩分の低減を図った。Here, in this embodiment, two steps surrounded by a dotted line in the block diagram of FIG. 1 are added,
Furthermore, the salt content was reduced.
【００２０】先ず、第１の追加工程（上の点線枠のも
の）について述べる。図２において荒砕きされ、水切り
された貝類１４は、約１ｍ3 容量の移送コンテナ１５に
入れられて、約４ｍ3 容量の水封形受入タンク（浸漬タ
ンクともいう）１６に投入される。この水封形受入タン
ク１６の底には、チェ−ンコンベア１７が敷設されてお
り、このチェ−ンコンベア１７によって、移送コンテナ
１５から間欠的（例えば、１５分毎）に投入された貝類
等１４が除々に出口の方に移動しながら、この水封形受
入タンク１６内で約１時間の滞留によって、浸漬されて
いる。そして、このチェ−ンコンベア１７は常時、除々
に出口に向け運行しているので、浸漬済の貝類等１４
は、この水封形受入タンク１６から排出されて、次の攪
拌洗浄タンク３へ連続して供給される。First, the first additional step (indicated by the dotted frame above) will be described. In FIG. 2, the shellfish 14 that has been roughly crushed and drained is placed in a transfer container 15 having a volume of about 1 m 3 and then placed in a water-sealed receiving tank (also referred to as a dipping tank) 16 having a volume of about 4 m 3 . A chain conveyor 17 is laid at the bottom of the water-sealed receiving tank 16, and the shell conveyor 17 intermittently (for example, every 15 minutes) puts the shellfish and the like 14 from the transfer container 15 by the chain conveyor 17. While gradually moving toward the outlet, it is immersed in the water-sealed receiving tank 16 by staying for about 1 hour. Since the chain conveyor 17 is constantly operating gradually toward the exit, the dipped shellfish etc. 14
Is discharged from the water-sealed receiving tank 16 and continuously supplied to the next stirring and washing tank 3.
【００２１】この水封形受入タンク１６では、攪拌洗浄
タンク３で洗浄に用いられ、回収された環流水１８が常
時、向流的に流れており、しかも、貝類等１４も、前記
のように除々に出口に向け移動しているので、この水封
形受入タンク１６では、いわゆる攪拌洗浄が行われ、脱
塩される。In the water-sealed receiving tank 16, the circulating water 18 used for cleaning in the stirring cleaning tank 3 is constantly flowing countercurrently, and the shellfish etc. 14 are also flowed as described above. Since the water is gradually moving toward the outlet, the water-sealed receiving tank 16 is so-called agitated and washed to be desalted.
【００２２】この脱塩を図５および図６のグラフで示
す。図５のグラフは、攪拌洗浄タンク３で洗浄に使用し
た環流水の塩分が５１０ｐｐｍの場合、図６のグラフは
同じく９２０ｐｐｍの場合を示す。これらの５１０ｐｐ
ｍと９２０ｐｐｍとは、攪拌洗浄タンク３における各種
の貝類（例えば、野積みの貝類や生の貝類）を洗浄した
とき、多数の実験により得られた洗浄水の塩分の下限と
上限を示す。そして、この２つの環流水を別々にして、
水封形受入タンク１６に満たした状態で流下させ、約７
５００ｍｇ／ｋｇの塩分をもつ貝類を浸漬して１０分毎
に分析した。その結果、これらの２つのいずれの環流水
でも、１時間後には原料貝類は約１５００ｍｇ／ｋｇの
塩分になった。This desalting is shown in the graphs of FIGS. The graph of FIG. 5 shows the case where the salt content of the circulating water used for cleaning in the stirring cleaning tank 3 is 510 ppm, and the graph of FIG. 6 also shows the case of 920 ppm. 510 pp of these
m and 920 ppm indicate the lower limit and the upper limit of the salinity of the wash water obtained by a number of experiments when various types of shellfish (for example, open-shelled shellfish and raw shellfish) in the stirred washing tank 3 are washed. And make these two circulating water separate,
Approximately 7
Shellfish having a salt content of 500 mg / kg were immersed and analyzed every 10 minutes. As a result, the raw shellfish had a salinity of about 1500 mg / kg after 1 hour with both of these two types of reflux water.
【００２３】したがって、原料貝類を水封形受入タンク
１６に除々に通すだけで、塩分が大幅に低減されると共
に、攪拌洗浄タンク３で使用済の環流水を用いるので、
洗浄プラントからの排水処理量が増加しない。なお、図
５、図６における塩分の分析は、図７に示す分析フロ−
チャ−トを用いた。Therefore, by simply passing the raw shellfish through the water-sealed receiving tank 16, the salt content is greatly reduced, and the used circulating water is used in the stirring and washing tank 3.
Wastewater treatment amount from the washing plant does not increase. Note that the analysis of salt content in FIGS. 5 and 6 is performed using the analysis flow chart shown in FIG.
The chart was used.
【００２４】次に、第２の追加工程（図１における下の
点線枠のもの）について述べる。図３において、液体サ
イクロン６のアンダ−フロ−から排出された破砕貝ガラ
１８と汚濁水とは、水切専用振動スクリ−ン１９の表面
に供給されて水切りされる。この水切りされた破砕貝ガ
ラ１８は渦流分離タンク１０へ投入される。この渦流分
離タンク１０では、水道水（塩素濃度１５〜２０ｐｐ
ｍ）、または河川水等の清水のみを使用して破砕貝ガラ
１８を攪拌洗浄する。なお、この水切専用振動スクリ−
ン１９の下方にはトラフ２０が設けられ、このトラフ２
０で受けられた汚濁水は、攪拌洗浄タンク３へ返流して
いる。Next, the second additional step (indicated by the lower dotted frame in FIG. 1) will be described. In FIG. 3, the crushed shellfish 18 and the polluted water discharged from the underflow of the liquid cyclone 6 are supplied to the surface of the vibration screen 19 exclusively for draining and drained. The drained crushed shellfish 18 is put into the vortex separation tank 10. In this vortex separation tank 10, tap water (chlorine concentration 15 to 20 pp
m), or using only fresh water such as river water, the crushed shellfish 18 is washed by stirring. In addition, this vibration screen dedicated to draining
A trough 20 is provided below the channel 19, and the trough 2
The polluted water received at 0 is returned to the stirring and washing tank 3.
【００２５】第２の追加工程の脱塩を図８のグラフで示
す。破砕貝ガラ１８は、渦流分離タンク１０を約０．５
分間で通過するので、０．５分毎に分析した。この結
果、０．５分後には、破砕貝ガラ１８は５０ｍｇ／ｋｇ
の塩分になった。なお、この塩分の分析は、図７の分析
フロ−チャ−トを用いた。The desalting of the second additional step is shown graphically in FIG. The crushed shell glass 18 is about 0.5 in the vortex separation tank 10.
Since it passed in minutes, it was analyzed every 0.5 minutes. As a result, the crushed shellfish 18 was 50 mg / kg after 0.5 minutes.
Became salty. In addition, the analysis flowchart of FIG. 7 was used for the analysis of this salt content.
【００２６】したがって、液体サイクロン６で分級され
た後、水切りされた破砕貝ガラ１８を、約０．５分間、
水道水（または、河川水等の清水でも可）で攪拌洗浄を
すれば、前記目標値の５０ｍｇ／ｋｇの塩分に脱塩され
る。Therefore, the crushed shellfish 18 which has been classified by the liquid cyclone 6 and then drained is used for about 0.5 minutes.
By stirring and washing with tap water (or fresh water such as river water, etc.), the salt content of the target value of 50 mg / kg is desalted.
【００２７】次いで、この目標値に達した洗浄済の破砕
貝ガラ１８を、更に、水道水のみがジエット散水してい
る振動スクリ−ン１２にかけ、脱塩、脱砂および脱水を
してから、更に、遠心脱水機１３にかけると、塩分付着
量は更に低減する。Next, the washed crushed shellfish 18 that has reached this target value is further subjected to a vibration screen 12 in which only tap water is jetted, and after desalting, sand removal and dehydration, Further, when it is applied to the centrifugal dehydrator 13, the amount of attached salt is further reduced.
【００２８】以上のような本実施例の洗浄方法によれ
ば、大量の生の貝類を、貝肉等の有機物と、貝ガラ等の
無機物と、汚濁水とを別々に処理することができ、殊
に、集中的に大量に発生する生の貝類を、腐敗のないう
ちに、直ちに処理でき、しかも、この貝ガラを安価なセ
メント原料に供することができる。勿論、本発明によれ
ば、野積の貝類（塩分濃度の低いもの）も、セメント原
料用貝ガラに洗浄することができる。According to the cleaning method of the present embodiment as described above, a large amount of raw shellfish can be separately treated with organic substances such as shell meat, inorganic substances such as shellfish, and polluted water. In particular, raw shellfish, which is produced in a large amount in a concentrated manner, can be immediately treated without decay, and this shellfish can be used as an inexpensive cement raw material. Of course, according to the present invention, shellfish of Nozumi (those having a low salt concentration) can also be washed into shellfish for cement raw material.
【００２９】[0029]
【発明の効果】本発明のセメント原料用貝ガラの洗浄方
法によれば、 大量でかつ生の原料貝類に付着している塩分は、浸漬
タンクで、意外にも、直ちに大幅に脱塩され、後工程の
洗浄を容易にすることができる。 浸漬タンクでは、洗浄に使用された回収水を用いるの
で、洗浄プラントの排水処理に負担をかけない。 浸漬により脱塩するので、特に動力を必要としない。 間欠的に供給する場合でも、連続的に排出して洗浄工
程に連続供給するので、洗浄プラントの連続稼働に支障
がなく、大量の廃棄貝ガラの短時間の処理に好都合とな
る。 特に、請求項４の発明によれば、生の原料貝類から、
直ちに脱貝肉を含めて脱塩して、セメント原料用貝ガラ
の洗浄コストを上げずに、付着塩分の目標値の５０ｍｇ
／ｋｇに脱塩した洗浄貝ガラを提供することができる。EFFECTS OF THE INVENTION According to the method for cleaning shellfish shellfish for cement raw material of the present invention, a large amount of salt adhering to raw raw material shellfish is, in the immersion tank, surprisingly and immediately desalinated, It is possible to facilitate the cleaning in the subsequent process. In the immersion tank, since the recovered water used for cleaning is used, the waste water treatment of the cleaning plant is not burdened. Since it is desalted by immersion, no power is required. Even when it is intermittently supplied, it is continuously discharged and continuously supplied to the cleaning process, which does not hinder the continuous operation of the cleaning plant and is convenient for treating a large amount of waste shellfish in a short time. Particularly, according to the invention of claim 4, from raw material shellfish,
Immediately desalination including deshelled meat, 50mg of target value of attached salt without increasing the cleaning cost of shellfish for cement raw material
It is possible to provide the washed shellfish demineralized to / kg.
【図１】本発明の実施例の貝ガラ洗浄方法を示すブロッ
ク図である。FIG. 1 is a block diagram showing a shellfish cleaning method according to an embodiment of the present invention.
【図２】図１における実施装置の部分概念図である。FIG. 2 is a partial conceptual view of an implementation device in FIG.
【図３】図１における実施装置の部分概念図である。FIG. 3 is a partial conceptual diagram of an implementation device in FIG.
【図４】従来例の装置概念図である。FIG. 4 is a conceptual diagram of a conventional device.
【図５】グラフである。FIG. 5 is a graph.
【図６】グラフである。FIG. 6 is a graph.
【図７】分析フロ−チャ−トである。FIG. 7 is an analysis flowchart.
【図８】グラフである。FIG. 8 is a graph.
３…攪拌洗浄タンク、５…破砕ポンプ、６…液体サイク
ロン、１０…渦流分離タンク、１２…振動スクリ−ン、
１３…遠心脱水機、１６…水封形受入タンク3 ... Agitation washing tank, 5 ... Crushing pump, 6 ... Hydrocyclone, 10 ... Vortex separation tank, 12 ... Vibration screen,
13 ... Centrifugal dehydrator, 16 ... Water-sealed receiving tank
───────────────────────────────────────────────────── 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 // Ｂ０３Ｂ 5/00 Ｚ 8925−4Ｄ ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification code Office reference number FI technical display location // B03B 5/00 Z 8925-4D
Claims (4)
よる洗浄工程により脱貝肉、脱塩、脱砂および脱水して
セメント原料用貝ガラを連続的に生産する方法におい
て、 前記洗浄に用いた回収水を常時、流下させている浸漬タ
ンクに、前記原料貝類を供給して所定の時間浸漬しなが
ら連続的に排出し、続けて、これを前記洗浄工程に連続
供給することを特徴とするセメント原料用貝ガラの洗浄
方法。1. A method for continuously producing shellfish for cement raw material by descaling meat, desalting, desanding and dehydrating a large amount of discarded raw material shellfish in a washing step with washing water, wherein The recovered water used is constantly supplied to an immersion tank that is allowed to flow down, the raw shellfish is continuously discharged while being immersed for a predetermined time, and then continuously supplied to the cleaning step. Cleaning method for shellfish shell for cement raw material.
による洗浄工程により脱塩、脱砂および脱水してセメン
ト原料用貝ガラを連続的に生産する方法において、 前記洗浄に用いた回収水を常時、流下させている浸漬タ
ンクに、前記原料貝ガラを供給して所定の時間浸漬しな
がら連続的に排出し、続けて、これを前記攪拌洗浄タン
クに連続供給することを特徴とするセメント原料用貝ガ
ラの洗浄方法。2. A method of continuously producing shellfish for cement raw material by desalting, desanding and dehydrating a large amount of discarded raw material shellfish in a washing step with washing water, wherein the recovery used for the washing Characteristically, the raw material shellfish is supplied to an immersion tank in which water is constantly flowing down, continuously discharged while being immersed for a predetermined time, and then continuously supplied to the stirring and washing tank. Cleaning method of shellfish shell for cement raw material.
タンク、破砕ポンプ、分級機、散水洗浄スクリ−ンおよ
び脱水機の順に通して、脱貝肉、脱塩、脱砂および脱水
してセメント原料用貝ガラを連続的に生産する方法にお
いて、 前記攪拌洗浄タンクの上流側に浸漬タンクを設け、該浸
漬タンクに、前記攪拌洗浄タンクで用いた洗浄水を常
時、流下させると共に、前記原料貝類を供給して所定の
時間浸漬しながら連続的に排出し、続けて、これを前記
攪拌洗浄タンクに連続供給することを特徴とするセメン
ト原料用貝ガラの洗浄方法。3. A large amount of discarded raw material shellfish is passed through a stirring and washing tank, a crushing pump, a classifier, a sprinkling and washing screen and a dehydrator in this order to remove shellfish meat, desalination, sand removal and dehydration. In a method for continuously producing shellfish for cement raw material, a dipping tank is provided on the upstream side of the stirring and washing tank, and the washing water used in the stirring and washing tank is constantly allowed to flow down, and the raw material is used. A method for cleaning shellfish shell for cement raw material, comprising supplying shellfish, continuously discharging the shellfish while soaking for a predetermined time, and continuously supplying the shellfish to the stirring and cleaning tank.
タンク、破砕ポンプ、分級機、渦流分離タンク、散水洗
浄スクリ−ンおよび脱水機の順に通して、脱貝肉、脱
塩、脱砂および脱水してセメント原料用貝ガラを連続的
に生産する方法において、 前記攪拌洗浄タンクの上流側に浸漬タンクを設け、該浸
漬タンクに、前記攪拌洗浄タンクで用いた洗浄水を常
時、流下させると共に、前記原料貝類を供給して所定の
時間浸漬しながら連続的に排出し、続けて、これを前記
攪拌洗浄タンクに連続供給し、しかも、前記分級機と渦
流分離タンクとの間に水切専用スクリ−ンを設けて破砕
貝ガラから汚濁水を水切りした後、該破砕貝ガラを清水
のみにより、前記渦流分離タンクで渦流洗浄した後、前
記散水洗浄スクリ−ンで散水洗浄することを特徴とする
セメント原料用貝ガラの洗浄方法。4. A large amount of discarded raw material shellfish is passed through an agitation washing tank, a crushing pump, a classifier, a vortex separation tank, a sprinkling washing screen and a dehydrator in this order to remove shellfish meat, desalination and desanding. In the method of continuously producing and dewatering shellfish for cement raw material, a dipping tank is provided on the upstream side of the stirring and washing tank, and the washing water used in the stirring and washing tank is constantly made to flow down. At the same time, the raw material shellfish are supplied and continuously discharged while being immersed for a predetermined time, and then continuously supplied to the stirring and washing tank, and moreover, only for draining between the classifier and the vortex separation tank. It is characterized in that after a contaminated water is drained from the crushed shellfish by providing a screen, the crushed shellfish is swirled and washed in the vortex separation tank only with fresh water, and then washed with the sprinkling cleaning screen. Method of cleaning a cement raw materials for shellfish gala that.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6124567A JPH07309645A (en) | 1994-05-13 | 1994-05-13 | Method for washing shell for cement stock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6124567A JPH07309645A (en) | 1994-05-13 | 1994-05-13 | Method for washing shell for cement stock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07309645A true JPH07309645A (en) | 1995-11-28 |
Family
ID=14888683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6124567A Pending JPH07309645A (en) | 1994-05-13 | 1994-05-13 | Method for washing shell for cement stock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07309645A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002362949A (en) * | 2001-06-07 | 2002-12-18 | Korea Ocean Research & Development Inst | Method of manufacturing solidifying material utilizing oyster shell |
| JP2006239677A (en) * | 2005-02-01 | 2006-09-14 | Kansai Electric Power Co Inc:The | Method and device of treating shellfish |
| JP2011147854A (en) * | 2010-01-19 | 2011-08-04 | Yanagida Sangyo Kk | Method and system for treating marine shellfish |
| CN106824994A (en) * | 2017-02-15 | 2017-06-13 | 上海浦东路桥建设股份有限公司 | Shell class waste material turns to the process of road engineering material |
| CN107309251A (en) * | 2017-08-07 | 2017-11-03 | 安徽今朝环保科技有限公司 | The innoxious transhipment of industrial slag salt, processing unit and application method |
-
1994
- 1994-05-13 JP JP6124567A patent/JPH07309645A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002362949A (en) * | 2001-06-07 | 2002-12-18 | Korea Ocean Research & Development Inst | Method of manufacturing solidifying material utilizing oyster shell |
| JP2006239677A (en) * | 2005-02-01 | 2006-09-14 | Kansai Electric Power Co Inc:The | Method and device of treating shellfish |
| JP2011147854A (en) * | 2010-01-19 | 2011-08-04 | Yanagida Sangyo Kk | Method and system for treating marine shellfish |
| CN106824994A (en) * | 2017-02-15 | 2017-06-13 | 上海浦东路桥建设股份有限公司 | Shell class waste material turns to the process of road engineering material |
| CN107309251A (en) * | 2017-08-07 | 2017-11-03 | 安徽今朝环保科技有限公司 | The innoxious transhipment of industrial slag salt, processing unit and application method |
| CN107309251B (en) * | 2017-08-07 | 2023-06-02 | 安徽今朝环保科技有限公司 | Industrial slag salt harmless transferring and treating device and use method |
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