JPH0436288B2 - - Google Patents
Info
- Publication number
- JPH0436288B2 JPH0436288B2 JP59146076A JP14607684A JPH0436288B2 JP H0436288 B2 JPH0436288 B2 JP H0436288B2 JP 59146076 A JP59146076 A JP 59146076A JP 14607684 A JP14607684 A JP 14607684A JP H0436288 B2 JPH0436288 B2 JP H0436288B2
- Authority
- JP
- Japan
- Prior art keywords
- kitchen waste
- carbon
- weight
- raw
- combustible
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000010806 kitchen waste Substances 0.000 claims description 37
- 229910052799 carbon Inorganic materials 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 17
- 239000007787 solid Substances 0.000 claims description 15
- 235000011389 fruit/vegetable juice Nutrition 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000002245 particle Substances 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000003077 lignite Substances 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 238000005345 coagulation Methods 0.000 claims description 6
- 230000015271 coagulation Effects 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 3
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 2
- 159000000014 iron salts Chemical class 0.000 claims description 2
- 230000003472 neutralizing effect Effects 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000002351 wastewater Substances 0.000 claims description 2
- 239000008394 flocculating agent Substances 0.000 claims 1
- 238000005728 strengthening Methods 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 description 19
- 239000010813 municipal solid waste Substances 0.000 description 14
- 239000000295 fuel oil Substances 0.000 description 12
- 230000006835 compression Effects 0.000 description 11
- 238000004062 sedimentation Methods 0.000 description 9
- 239000003245 coal Substances 0.000 description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000010865 sewage Substances 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 238000005189 flocculation Methods 0.000 description 5
- 230000016615 flocculation Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- QJZYHAIUNVAGQP-UHFFFAOYSA-N 3-nitrobicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid Chemical compound C1C2C=CC1C(C(=O)O)C2(C(O)=O)[N+]([O-])=O QJZYHAIUNVAGQP-UHFFFAOYSA-N 0.000 description 3
- 208000005156 Dehydration Diseases 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003311 flocculating effect Effects 0.000 description 3
- 239000004021 humic acid Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000005273 aeration Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003350 kerosene Substances 0.000 description 2
- 239000006148 magnetic separator Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 239000010812 mixed waste Substances 0.000 description 2
- 230000009965 odorless effect Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 102000001999 Transcription Factor Pit-1 Human genes 0.000 description 1
- 108010040742 Transcription Factor Pit-1 Proteins 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 150000001413 amino acids Chemical class 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000010794 food waste Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 239000011973 solid acid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Gasification And Melting Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Description
発明の分野
本発明は生厨芥の可燃処理法に関し、より詳細
には生厨芥の単独処理を無公害かつ省エネルギー
で効果的に処理する方法に関する。
従来技術
一般に含水率の極めて低い雑芥と含水率の極め
て高い生厨芥とを同時に混合燃焼する場合には、
高発熱量の雑芥の燃焼までが阻害されて、焼却炉
内環境の不順を招き、全体の焼却効率が著しく悪
化する。その結果、燃焼助剤として使用される重
油、灯油等の消費量が増加し、炉内雰囲気温度の
みが上昇するため炉壁の損耗が著しく、また窒素
酸化物の有毒ガスを発生するという甚だ不都合な
問題が生じている。
本発明の目的
即ち本発明の目的は、発熱量の低い燃焼困困難
な生厨芥を自然限界に到達せしめて極めて低燃費
において完全灰化し得る様に可燃処理すると共に
極めて多量に随伴する汚水を有効に無公害浄化処
理する方法を提供するにある。
発明の概要
本発明によれば、生厨芥を30Kg／cm2以上の圧力
によつて圧縮し脱水することによりその発熱量を
向上せしめる生厨芥の可燃処理法において、前記
圧縮工程において排出される搾汁に対して、９メ
ツシユ乃至500メツシユの粒径のものが85乃至95
重量％の範囲となる様に粒度調整された褐炭の微
粉末を、該搾汁の固形分100重量部当り30乃至200
重量部添加混合し、ナフサカーボン、オイルカー
ボン等の凝集補助剤、鉄塩、硫酸バンド、次亜塩
素酸ソーダ、ポリ塩化アルミニウム等の等電点設
定剤、苛性ソーダ、石灰乳等の中和剤及び高分子
凝集剤等のフロツク強化剤を添加して固液分離を
連続的に行ない、生成した処理水を清澄排水とし
て系外に排出すると共に、次いで沈降凝集物を脱
水して捕集した含炭ケーキを前記生厨芥に生厨芥
の固形分当り10乃至100重量％の割合で混合して
圧縮を行なうことを特徴とする生厨芥の可燃処理
法が提供される。
発明の構成
本発明においては、生厨芥を30Kg／cm2以上の圧
力によつて圧縮脱水を行なうことによりその発熱
量を増大せしめ可燃物とする。
本発明の重要な特徴は、上記圧縮脱水により排
出される搾汁を褐炭の粒度調整微粉炭（以下
MFCと略す）を用いて凝集沈降処理に賦し、得
られる含炭処理ケーキを圧縮脱水処理すべき生厨
芥と混合し、圧縮脱水による可燃処理を行なうこ
とにある。
即ち、この搾汁にMFCを添加混合し凝集沈降
処理を行なう。
このMFCは、９メツシユ乃至500メツシユの粒
径のものが85乃至95重量％の範囲となる様に粒度
調整されており、褐炭の微粉末から成つている。
この様に粒度調整された褐炭の微粉末を使用する
ことにより搾汁の凝集沈降分離が迅速且つ有効に
行なわれるのである。
この理由は、褐炭は一般に単に搾汁汚水の微粒
固形物等に対する吸着力が強いというだけでな
く、通常かなりの量のフミン酸（腐植酸）を賦有
しており、このフミン酸はその構造中に、フエノ
ール性水酸基、カルボキシル基、カルボニル基等
の活性官能基を有する固体酸であつて、該微粉炭
はこのため一種のイオン交換体としての作用を示
し、これが一般には困難とされるゾル状固形物の
有効な凝集に寄与しているものと推測される。
本発明において、MFCは搾汁の固形分100重量
部当り30乃至200重量部の量を使用する。この範
囲よりも少量であれば凝集沈降分離に際して所望
の効果が達成されず、また多量に使用した場合に
は搾汁の処理効率が低下するという不都合を生じ
る。
凝集沈降分離は、搾汁に上記MFCを混入攪拌
し、次いで該混合物を静置し、上澄液と含炭固形
分とに分離し、この含炭固形分を過し脱水する
ことにより行なう。
本発明によれば、前述したMFCを凝集沈降剤
として使用し、更にナフサカーボン、オイルカー
ボン等の凝集補助剤、鉄塩、硫酸バンド、次亜塩
素酸ソーダ、ポリ塩化アルミニウム等の等電点設
定剤、苛性ソーダ、石灰乳等の中和剤を適宜配合
する。
一般に生厨芥の圧縮脱水排液中に含まれる固形
分は、分散媒としての水に極めて均密になじんだ
安定なゾル状態で存在するために、この固形分の
沈降分離は通常の凝集沈降分離では容易に行なえ
ないのである。而して本発明に従い、所定の粒度
分布を有する微粉炭を凝集沈降剤として使用する
ことにより、固形分の沈降分離が極めて容易に行
い得るのである。
また生厨芥の圧縮脱水排液は、BOD30000〜
160000ppm、COD20000〜50000ppm、及び
SS40000〜50000ppm程度であり、アミノ酸系の
腐敗性有機物を含む悪臭濃厚廃液であるが、微粉
炭を使用した上記凝集沈降処理によつて腐敗成分
の酸化分解が行なわれ、該廃液の無臭化が行なわ
れるという利点も達成される。
本発明においては更に、上述した凝集沈降処理
によつて得られた含炭ケーキを生厨芥と混合し、
圧縮脱水処理を行なつて可燃化する。
即ち、生厨芥は75重量％以上の含水率を有して
おり、これを30Kg／cm2以上の圧力を用いて脱水処
理した場合、その含水率は通常35乃至60重量％程
度に迄脱水される。
この場合生厨芥の発熱量は387Kcal／Kgwetで
あるから、含炭ケーキを用いないで圧縮処理した
とすると、含水率が最大60％になつたとしてその
低位発熱量は約1000Kcal／Kgwetとなる（水の蒸
発熱は約9.7Kcal／molとして算出）。
而して凝集沈降分離により得られた含炭ケーキ
の含水率は約60％前後であるから、MFCとして
4000Kcal／Kgの発熱量を有する微粉炭を、搾液
中の固形分と同量使用した場合には、その低位発
熱量は約1200Kcal／Kgである。然るにこの含炭
ケーキは数日の風乾により含水率が約30％となる
から、その低位発熱量は約2800Kcal／Kgとなり、
これは自燃限界を!?かに超える。従つて先の圧縮
厨芥の助燃剤として利用することが可能となる。
尚、参考のため含炭ケーキの含水率と燃焼温度と
の関係を第１図に示す。
尚、燃焼温度ｔと、固形分低位発熱量（絶乾平
均）Hl（Kcal／Kgとの関係は下記式で表わされ
る。
t℃＝0.99−Hl(1-P)−526P＋43／6.5×10-4Hl(1-P)＋
0.73−0.23P
式中、Ｐは含水率（％×１／100）を示す。
例えば、通常の雑芥15t（2000Kcal／Kgwet（30
％H2Ｏ））と生厨芥15t（387.5Kcal／Kgwet（75％
H2Ｏ））とを混合燃焼する場合について説明す
る。
この場合800℃で燃焼を維持するためには、
1333Kcal／Kgwetの熱量が必要である（着燃
420.1Kcal／Kgwet、ガス顕熱増加分845.3Kcal／
Kgwet、炉体放散熱67.6Kcal／Kgwet）。
従つて燃焼に必要な重油消費量は、
（1333−2000＋387.5／２）／6000＝23.3l／t.wet
（重油の発熱量は6000Kcal／ｌ）
となる。
これに対して30Kg／cm2以上の圧力を用いて
15tonの生厨芥の圧縮脱水を行なうと、約60％以
下の含水率に脱水され、厨芥重量は約1/2となる。
従つて雑芥と圧縮処理された厨芥（低位発熱量
は1000Kcal／Kg）との混合物の低位発熱量は、
1662Kcal／Kgとなる。この混合芥を800℃の温度
で燃焼を維持するためには、1590Kcal／Kgwetの
熱量が必要である。而してこの場合の着火熱は
503.3Kcal／Kg、混合芥の発熱量が1662Kcal／Kg
wetであるから重油による助燃は殆んど不必要と
なる。
更に本発明に従い、生厨芥の圧縮処理により排
出された搾汁の凝集処理から捕集された含炭ケー
キ（含水率30％程度まで風乾されている）の低位
発熱量は約2800Kcal／Kgwetであり、これを圧縮
処理前の生厨芥と混合（生厨芥の固形分当り20重
量％）して圧縮処理を行なえば、圧縮厨芥の低位
発熱量は、1300Kcal／Kgwetとなる。従つて雑芥
との混合芥の低位発熱量は1750Kcal／Kgに増大
する。斯くしてこの混合芥の燃焼は重油や灯油等
を使用することなく極めて安定に行い得ることが
理解されよう。
尚、凝集処理からの含炭ケーキの使用量は、該
処理の際に用いる褐炭MFCの炭質等によつても
異なるが、通常生厨芥の固形分当り10乃至100重
量％の範囲、特に20乃至50重量％の範囲とするこ
とが好適である。これよりも少量の場合には、発
熱量の増大がもたらされず、多量に使用した場合
には生厨芥の処理効率が低下する。
更に第２図に高温焼却（燃焼排ガス温度900℃）
における焼却炉機種別重油消費量と焼却すべき塵
芥の低位発熱量との関係を示す線図を表わす。
第２図において曲線Ａは空気予熱のない機種
（セミ機械炉）、曲線Ｂは200℃の予熱空気を使用
する機種（機械炉）、曲線Ｃは600℃予熱空気を使
用する機種（ジエツト式炉）の場合を示す。
この第２図によれば、200℃の予熱空気を使用
する機種においては、塵芥発熱量が約
1600Kcal／Kgにおいて理論重油消費量が０、即
ち自燃限界にある。
また600℃予熱空気を使用する焼却炉の場合に
は、圧縮処理のみで重油を必要としない自燃限界
に到達することが理解されよう。
従つて本発明の可燃処理により生厨芥の発熱量
は雑芥の発熱量近くまで増大され、焼却炉の燃焼
性を重油等を使用することなく安定化することが
可能となる。
発明の好適態様
以下本発明の可燃処理法を添付図面に示す具体
例に基づいて説明する。
本発明の可燃処理法のフローチヤートを示す第
３図において、収集された塵芥はクレーン１によ
り雑芥ピツト２と厨芥ピツト３に配分され、雑芥
はグライフアーで焼却炉２２に供給される。
生厨芥はホツパー４から破砕機５によつて分解
されてからマグネツトセパレーター６で金属類を
捕収し、金属回収函７に貯留する。金属類を除去
した破砕生厨芥はコンベヤーで運ばれて圧縮脱水
機８に供給され、約30Kg／cm2のプレス圧力で圧縮
されて含有する水分はスカムと共に多孔シリンダ
ーから搾汁として圧出される。脱水された圧縮厨
芥重量と搾出汚汁重量は略々同量となる。搾出汚
汁は前述の如くBCD，COD共に70000ppmを超え
る悪臭有機物質を含有するので汚汁ピツト９に受
けてから曝気槽１０に送入する。この時、必要な
場合は、搾汁をピツト９又は曝気槽１０で清澄な
水で稀釈してもよい。次にその搾汁立方米当り
MFCを1000ppm乃至5000ppmの範囲で添加しブ
FIELD OF THE INVENTION The present invention relates to a method for combustible disposal of kitchen waste, and more particularly to a method for effectively treating raw kitchen waste alone in a pollution-free and energy-saving manner. Prior Art Generally, when miscellaneous waste with an extremely low moisture content and kitchen waste with an extremely high moisture content are mixed and burned at the same time,
The combustion of garbage with a high calorific value is also inhibited, resulting in an unstable environment within the incinerator, and the overall incineration efficiency deteriorates significantly. As a result, the consumption of heavy oil, kerosene, etc. used as combustion aids increases, and only the atmospheric temperature inside the furnace increases, resulting in significant wear and tear on the furnace walls, and the generation of toxic nitrogen oxide gas, which is a serious inconvenience. A problem has arisen. Purpose of the present invention That is, the purpose of the present invention is to treat raw kitchen waste, which has a low calorific value and is difficult to burn, to its natural limit so that it can be completely ashed with extremely low fuel consumption, and to effectively use a large amount of accompanying sewage. The goal is to provide a pollution-free purification method. SUMMARY OF THE INVENTION According to the present invention, in a method for combustible processing of raw kitchen waste, which improves the calorific value by compressing the raw kitchen waste at a pressure of 30 kg/cm 2 or more and dehydrating it, For the juice, particles with a particle size of 9 mesh to 500 mesh are 85 to 95
Fine lignite powder whose particle size has been adjusted to a range of 30 to 200 parts by weight per 100 parts by weight of the solid content of the squeezed juice.
Add and mix parts by weight, flocculation aids such as naphtha carbon and oil carbon, isoelectric point setting agents such as iron salt, band sulfate, sodium hypochlorite and polyaluminum chloride, neutralizing agents such as caustic soda and milk of lime, and Solid-liquid separation is performed continuously by adding a flocculation agent such as a polymer flocculant, and the generated treated water is discharged outside the system as clear wastewater, and then the settled flocculates are dehydrated and collected. A method for combustible processing of kitchen waste is provided, which comprises mixing the cake with the kitchen waste at a ratio of 10 to 100% by weight based on the solid content of the kitchen waste and compressing the mixture. Structure of the Invention In the present invention, raw kitchen waste is compressed and dehydrated at a pressure of 30 kg/cm 2 or more to increase its calorific value and make it combustible. An important feature of the present invention is that the squeezed juice discharged by the above-mentioned compression dehydration is converted into pulverized lignite coal (hereinafter referred to as pulverized coal).
The carbon-containing cake thus obtained is mixed with raw kitchen waste to be compressed and dehydrated, and subjected to combustible treatment by compression dehydration. That is, MFC is added to and mixed with this squeezed juice, and flocculation and sedimentation treatment is performed. This MFC is made of fine powder of lignite whose particle size is adjusted so that the particle size of 9 mesh to 500 mesh is in the range of 85 to 95% by weight.
By using fine brown coal powder whose particle size has been adjusted in this way, the coagulation and sedimentation separation of squeezed juice can be carried out quickly and effectively. The reason for this is that lignite generally not only has a strong adsorption power for fine solids in squeezed sewage, but also usually contains a considerable amount of humic acid (humic acid), and this humic acid is contained in its structure. It is a solid acid having active functional groups such as phenolic hydroxyl groups, carboxyl groups, and carbonyl groups, and the pulverized coal therefore acts as a kind of ion exchanger, which is difficult to achieve in the form of a sol. It is presumed that this contributes to the effective flocculation of solids. In the present invention, MFC is used in an amount of 30 to 200 parts by weight per 100 parts by weight of solid content of squeezed juice. If the amount is less than this range, the desired effect will not be achieved during coagulation-sedimentation separation, and if it is used in a large amount, the processing efficiency of juice will be reduced. The coagulation and sedimentation separation is carried out by mixing the squeezed juice with the MFC and stirring, then allowing the mixture to stand, separating the supernatant liquid and the carbon-containing solids, and filtering and dehydrating the carbon-containing solids. According to the present invention, the above-mentioned MFC is used as a flocculating sedimentation agent, and the isoelectric point setting of flocculating aids such as naphtha carbon and oil carbon, iron salts, sulfate band, sodium hypochlorite, polyaluminum chloride, etc. Neutralizers such as caustic soda, milk of lime, etc. are added as appropriate. In general, the solid content contained in the compressed dewatered liquid of kitchen waste exists in a stable sol state that is very evenly blended with water as a dispersion medium. This cannot be done easily. Therefore, according to the present invention, by using pulverized coal having a predetermined particle size distribution as a flocculating and settling agent, sedimentation and separation of solid content can be carried out extremely easily. In addition, compressed dewatering liquid from raw kitchen waste costs BOD30,000~
160000ppm, COD20000~50000ppm, and
The SS is about 40,000 to 50,000 ppm, and it is a foul-smelling, concentrated waste liquid that contains amino acid-based putrefactive organic matter, but the above-mentioned coagulation sedimentation treatment using pulverized coal oxidizes and decomposes the putrefactive components, making the waste liquid odorless. The advantage of In the present invention, the carbon-containing cake obtained by the above-mentioned coagulation sedimentation treatment is further mixed with raw kitchen waste,
It is made combustible by compression dehydration treatment. That is, raw kitchen waste has a water content of 75% by weight or more, and when it is dehydrated using a pressure of 30 kg/cm 2 or more, the water content is usually dehydrated to about 35 to 60% by weight. Ru. In this case, the calorific value of raw kitchen waste is 387 Kcal/Kgwet, so if compression treatment is performed without using a carbon-containing cake, the lower calorific value will be approximately 1000 Kcal/Kgwet even if the moisture content reaches a maximum of 60% ( The heat of vaporization of water is calculated as approximately 9.7Kcal/mol). Since the moisture content of the carbon-containing cake obtained by coagulation-sedimentation is around 60%, it can be used as an MFC.
When pulverized coal having a calorific value of 4000 Kcal/Kg is used in the same amount as the solid content in the squeezed liquid, its lower calorific value is approximately 1200 Kcal/Kg. However, after several days of air drying, the moisture content of this carbon-containing cake becomes approximately 30%, so its lower calorific value is approximately 2800Kcal/Kg.
This far exceeds the self-combustion limit! Therefore, it can be used as a combustion aid for the compressed kitchen waste.
For reference, FIG. 1 shows the relationship between the moisture content of the carbon-containing cake and the combustion temperature. The relationship between combustion temperature t and solid content lower calorific value (absolutely dry average) Hl (Kcal/Kg) is expressed by the following formula: t℃=0.99−Hl(1-P)−526P+43/6.5×10 − 4 Hl(1-P)＋
0.73−0.23P In the formula, P indicates water content (%×1/100). For example, regular garbage 15t (2000Kcal/Kgwet (30
%H 2 O)) and raw kitchen waste 15t (387.5Kcal/Kgwet (75%
A case of mixed combustion of H 2 O)) will be explained. In this case, to maintain combustion at 800℃,
A heat amount of 1333Kcal/Kgwet is required (ignition
420.1Kcal/Kgwet, gas sensible heat increase 845.3Kcal/
Kgwet, furnace body dissipated heat 67.6Kcal/Kgwet). Therefore, the amount of heavy oil consumed for combustion is (1333-2000+387.5/2)/6000=23.3l/t.wet (heavy oil has a calorific value of 6000Kcal/l). On the other hand, using a pressure of 30Kg/cm2 or more
When 15 tons of kitchen waste is compressed and dehydrated, the water content is reduced to about 60% or less, and the weight of the kitchen waste is reduced to about 1/2. Therefore, the lower heating value of a mixture of garbage and compressed kitchen waste (lower heating value is 1000Kcal/Kg) is:
It becomes 1662Kcal/Kg. To maintain combustion of this mixed waste at a temperature of 800°C, a heat amount of 1590 Kcal/Kgwet is required. Therefore, the ignition heat in this case is
503.3Kcal/Kg, calorific value of mixed fruit is 1662Kcal/Kg
Since it is wet, auxiliary combustion with heavy oil is almost unnecessary. Further, according to the present invention, the lower calorific value of the carbon-containing cake (air-dried to a moisture content of about 30%) collected from the coagulation treatment of the squeezed juice discharged from the compression treatment of raw kitchen waste is approximately 2800 Kcal/Kgwet. If this is mixed with raw kitchen waste before compression treatment (20% by weight based on the solid content of raw kitchen waste) and subjected to compression treatment, the lower calorific value of the compressed kitchen waste will be 1300 Kcal/Kgwet. Therefore, the lower calorific value of waste mixed with miscellaneous waste increases to 1750 Kcal/Kg. It will be understood that the combustion of this mixed waste can be carried out extremely stably without using heavy oil or kerosene. The amount of carbon-containing cake used from the flocculation treatment varies depending on the carbon quality of the lignite MFC used in the treatment, but it is usually in the range of 10 to 100% by weight, especially in the range of 20 to 100% by weight based on the solid content of raw kitchen waste. A preferable range is 50% by weight. If the amount is smaller than this, no increase in calorific value will be brought about, and if the amount is used in a large amount, the processing efficiency of raw food waste will be reduced. Furthermore, Figure 2 shows high-temperature incineration (combustion exhaust gas temperature 900℃).
A diagram showing the relationship between heavy oil consumption by incinerator model and the lower calorific value of trash to be incinerated. In Figure 2, curve A is a model without air preheating (semi-mechanical furnace), curve B is a model that uses 200℃ preheated air (mechanical furnace), and curve C is a model that uses 600℃ preheated air (jet type furnace). ) is shown. According to this figure 2, in the model that uses preheated air at 200℃, the amount of heat generated by the dust is approximately
At 1600Kcal/Kg, the theoretical heavy oil consumption is 0, that is, at the self-combustion limit. Furthermore, in the case of an incinerator that uses preheated air at 600°C, it is understood that the self-combustion limit can be reached without the need for heavy oil through compression processing alone. Therefore, the combustible treatment of the present invention increases the calorific value of raw kitchen waste to nearly that of miscellaneous garbage, making it possible to stabilize the combustibility of the incinerator without using heavy oil or the like. Preferred Embodiments of the Invention The combustible disposal method of the present invention will be explained below based on specific examples shown in the accompanying drawings. In FIG. 3 showing a flowchart of the combustible disposal method of the present invention, the collected garbage is distributed by a crane 1 to a garbage pit 2 and a kitchen garbage pit 3, and the garbage is supplied to an incinerator 22 by a greifter. Raw kitchen waste is disassembled by a crusher 5 from a hopper 4, metals are collected by a magnetic separator 6, and stored in a metal recovery box 7. The crushed raw kitchen waste from which metals have been removed is conveyed by a conveyor and supplied to a compression dehydrator 8, where it is compressed at a press pressure of about 30 kg/cm 2 and the water contained therein is squeezed out as juice from a porous cylinder along with the scum. The weight of the dehydrated compressed kitchen waste and the weight of the squeezed sewage are approximately the same. As mentioned above, the expressed sewage contains foul-smelling organic substances in both BCD and COD exceeding 70,000 ppm, so it is received in the sewage pit 9 and then sent to the aeration tank 10. At this time, if necessary, the squeezed juice may be diluted with clear water in the pit 9 or the aeration tank 10. Next, the juice per cubic meter
Add MFC in the range of 1000ppm to 5000ppm
【表】
発明の効果
一般に都市塵芥の焼却における重油消費量は焼
却トン当り100〜130であるが、本発明による生
厨芥の可燃処理法によれば、着火に際して極く僅
かの重油（10〜15／ｔ）を使用するのみで完全
燃焼が可能となり、その省エネルギー効果は莫大
である。
また本発明においては、生厨芥の圧縮処理によ
り排出する廃液を無臭化処理するとともに、回収
固形分を生厨芥の可燃処理に供するため、処理工
程を極めて合理的に行い得るという効果も有す
る。
更に本発明の可燃処理法によれば、近年急増し
ている雑芥中に含まれる塩化ビニル類の超高熱燃
焼を適当な燃焼温度に調整することが可能とな
り、その結果、炉体維持が良好となり、窒素酸化
物の有毒ガスの発生を減少させることが可能とな
るものである。[Table] Effects of the invention Generally, the amount of heavy oil consumed in incineration of urban garbage is 100 to 130 kg per ton of incineration, but according to the method for combustible disposal of kitchen waste according to the present invention, only a small amount of heavy oil (10 to 15 kg) is consumed at the time of ignition. /t), complete combustion is possible, and the energy saving effect is enormous. Furthermore, in the present invention, the waste liquid discharged from the compression treatment of kitchen waste is treated to be odorless, and the recovered solid content is used for the combustible treatment of the kitchen waste, so that the treatment process can be carried out extremely rationally. Furthermore, according to the combustible treatment method of the present invention, it is possible to adjust the extremely high-temperature combustion of vinyl chloride contained in miscellaneous garbage, which has been rapidly increasing in recent years, to an appropriate combustion temperature, and as a result, the furnace body can be maintained well. This makes it possible to reduce the generation of toxic nitrogen oxide gas.
第１図は、含炭ケーキの含水率と燃焼温度との
関係を示す線図、第２図は、高温焼却における焼
却炉機種別重油消費量と焼却すべき塵芥の低位発
熱量との関係を示す線図、第３図は、本発明の可
燃処理法のフローチヤートを示す。
引照数字２は雑芥ピツト、３は厨芥ピツト、４
はホツパー、５は破砕機、６はマグネツトセパレ
ータ、８は圧縮脱水機、９は汚汁ピツト、１１及
び１２は反応槽、１３は固液分離槽、２１は脱水
機、２２は焼却炉を示す。
Figure 1 is a diagram showing the relationship between the moisture content of the coal-containing cake and the combustion temperature, and Figure 2 is a diagram showing the relationship between heavy oil consumption by incinerator model and the lower calorific value of the garbage to be incinerated in high-temperature incineration. The diagram shown in FIG. 3 shows a flowchart of the combustible treatment method of the present invention. Reference number 2 is garbage pit, 3 is kitchen garbage pit, 4
is a hopper, 5 is a crusher, 6 is a magnetic separator, 8 is a compression dehydrator, 9 is a sewage pit, 11 and 12 are reaction tanks, 13 is a solid-liquid separation tank, 21 is a dehydrator, and 22 is an incinerator. show.
Claims (1)
脱水することによりその発熱量を向上せしめる生
厨芥の可燃処理法において、 前記圧縮工程において排出される搾汁に対し
て、９メツシユ乃至500メツシユの粒径のものが
85乃至95重量％の範囲となる様に粒度調整された
褐炭の微粉末を、該搾汁の固形分100重量部当り
30乃至200重量部添加混合し、ナフサカーボン、
オイルカーボン等の凝集補助剤、鉄塩、硫酸バン
ド、次亜塩素酸ソーダ、ポリ塩化アルミニウム等
の等電点設定剤、苛性ソーダ、石灰乳等の中和剤
及び高分子凝集剤等のフロツク強化剤を添加して
固液分離を連続的に行ない、生成した処理水を清
澄排水として系外に排出すると共に、沈降凝縮物
を脱水して捕集した含炭ケーキを前記生厨芥に生
厨芥の固形分当り10乃至100重量％の割合で混合
して圧縮を行うことを特徴とする生厨芥の可燃処
理法。[Scope of Claims] 1. A method for combustible processing of raw kitchen waste in which the calorific value is increased by compressing the raw kitchen waste at a pressure of 30 Kg/cm 2 or more and dehydrating it, wherein the squeezed juice discharged in the compression process is On the other hand, those with a particle size of 9 mesh to 500 mesh
Fine lignite powder whose particle size is adjusted to be in the range of 85 to 95% by weight per 100 parts by weight of the solid content of the squeezed juice.
Add and mix 30 to 200 parts by weight, naphtha carbon,
Coagulation aids such as oil carbon, isoelectric point setting agents such as iron salts, band sulfate, sodium hypochlorite, polyaluminum chloride, neutralizing agents such as caustic soda and milk of lime, and floc strengthening agents such as polymer flocculants. is added to continuously perform solid-liquid separation, and the generated treated water is discharged from the system as clear wastewater, and the settled condensate is dehydrated and the collected carbon-containing cake is added to the raw kitchen waste. A method for combustible disposal of raw kitchen waste, characterized by mixing and compressing at a rate of 10 to 100% by weight per minute.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14607684A JPS6124910A (en) | 1984-07-16 | 1984-07-16 | Incinerating disposal of raw garbage |
| KR1019850005058A KR860001179A (en) | 1984-07-16 | 1985-07-16 | Combustible treatment of wet kitchen trash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14607684A JPS6124910A (en) | 1984-07-16 | 1984-07-16 | Incinerating disposal of raw garbage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6124910A JPS6124910A (en) | 1986-02-03 |
| JPH0436288B2 true JPH0436288B2 (en) | 1992-06-15 |
Family
ID=15399559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14607684A Granted JPS6124910A (en) | 1984-07-16 | 1984-07-16 | Incinerating disposal of raw garbage |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS6124910A (en) |
| KR (1) | KR860001179A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2320164A2 (en) | 2009-10-05 | 2011-05-11 | Panasonic Corporation | Refrigeration cycle apparatus and hot water heater |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114308979A (en) * | 2021-12-21 | 2022-04-12 | 楚永杰 | Garbage crushing and drying device suitable for garbage incineration power generation engineering |
| CN116618418B (en) * | 2023-07-24 | 2024-02-09 | 江苏乾景环保科技有限公司 | Solid waste processing apparatus for environmental protection |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5130389A (en) * | 1974-09-06 | 1976-03-15 | Hitachi Metals Ltd |
-
1984
- 1984-07-16 JP JP14607684A patent/JPS6124910A/en active Granted
-
1985
- 1985-07-16 KR KR1019850005058A patent/KR860001179A/en not_active Application Discontinuation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5130389A (en) * | 1974-09-06 | 1976-03-15 | Hitachi Metals Ltd |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2320164A2 (en) | 2009-10-05 | 2011-05-11 | Panasonic Corporation | Refrigeration cycle apparatus and hot water heater |
| EP2320164A3 (en) * | 2009-10-05 | 2014-02-05 | Panasonic Corporation | Refrigeration cycle apparatus and hot water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6124910A (en) | 1986-02-03 |
| KR860001179A (en) | 1986-02-24 |
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