WO2023188114A1 - Appareil et procédé de traitement de boues organiques - Google Patents
Appareil et procédé de traitement de boues organiques Download PDFInfo
- Publication number
- WO2023188114A1 WO2023188114A1 PCT/JP2022/016013 JP2022016013W WO2023188114A1 WO 2023188114 A1 WO2023188114 A1 WO 2023188114A1 JP 2022016013 W JP2022016013 W JP 2022016013W WO 2023188114 A1 WO2023188114 A1 WO 2023188114A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- organic sludge
- raw material
- cement
- mixing
- preheated
- Prior art date
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims description 13
- 239000002994 raw material Substances 0.000 claims abstract description 70
- 238000002156 mixing Methods 0.000 claims abstract description 30
- 238000010304 firing Methods 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000001354 calcination Methods 0.000 claims abstract description 10
- 239000000428 dust Substances 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims description 48
- 238000001035 drying Methods 0.000 claims description 10
- 239000007787 solid Substances 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 16
- 235000012255 calcium oxide Nutrition 0.000 description 8
- 239000000292 calcium oxide Substances 0.000 description 8
- 239000010801 sewage sludge Substances 0.000 description 7
- 239000000446 fuel Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- JTJMJGYZQZDUJJ-UHFFFAOYSA-N phencyclidine Chemical class C1CCCCN1C1(C=2C=CC=CC=2)CCCCC1 JTJMJGYZQZDUJJ-UHFFFAOYSA-N 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005194 fractionation Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 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
- 238000006114 decarboxylation reaction Methods 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/13—Treatment of sludge; Devices therefor by de-watering, drying or thickening by heating
Definitions
- the present invention relates to an apparatus and method for treating organic sludge such as sewage sludge, and relates to an apparatus and the like that effectively utilizes organic sludge as fuel and the like.
- Patent Document 1 discloses a technology in which organic sludge such as sewage sludge, in the form of a water-containing slurry, is directly charged into the kiln bottom or calciner of a cement manufacturing facility to be turned into fuel. .
- Patent Document 2 discloses a technology in which sewage sludge and quicklime are mixed, the sewage sludge is dehydrated, and the resulting solid content is put into a cement kiln to form cement together with other cement raw materials.
- Patent Document 3 and Patent Document 4 disclose techniques for drying sewage sludge using quicklime as a preheater bottom raw material and quicklime as bypass dust.
- the organic sludge is fed into the cement kiln in the form of a water-containing slurry to the part where the cement raw material undergoes the decarboxylation reaction (from the bottom of the kiln to the bottom cyclone inlet), so the sludge water content is reduced.
- the amount of heat required for evaporation is large, the location and time of evaporation of water are not constant, the amount of exhaust gas fluctuates, and the firing temperature suddenly drops, reducing cement production efficiency.
- Patent Document 5 the present applicant separated the preheated raw material from the preheater cyclones excluding the lowest cyclone of the cement firing equipment, mixed the organic sludge with the preheated raw material, and used the sensible heat of the preheated raw material.
- organic sludge is dried using the sensible heat of the preheated raw material, and the dried sludge is dried together with the preheated raw material in a duct between the calciner or the bottom of the cement kiln and the calciner.
- the dried sludge can be effectively used as a fuel substitute, and the heat source can efficiently contribute to the decarbonation of cement raw materials in calciners, etc., reducing equipment costs, cement production efficiency, and clinker production. It is possible to treat organic sludge while minimizing the deterioration of organic sludge.
- the dried sludge dried using the sensible heat of the preheated raw material has a temperature of about 100°C and has an odor, so it cannot be returned to the cement raw material system. Heat loss occurs because the preheated raw material is returned to the duct between the bottom of the calciner or cement kiln and the calciner.
- the temperature of the preheated raw material is relatively low at around 650°C, so the amount of preheated raw material collected increases and processing costs increase. There is also the problem of doing so.
- the present invention was made in view of the above-mentioned problems in the conventional technology, and aims to treat organic sludge while maintaining stable operation with less heat loss and less amount of fractionation. do.
- the present invention provides an organic sludge treatment device, which includes a fractionating device that fractionates a preheated raw material from a calciner of a cement firing device, and a fractionating device that collects organic sludge by the fractionating device.
- a mixing device that mixes the organic sludge with a preheated raw material and dries the organic sludge using the sensible heat of the preheated raw material, and a supply device that supplies the mixture discharged from the mixing device to the raw material supply system of the cement firing device. It is characterized by being prepared.
- the conventional mixture in order to return the mixture of dried organic sludge and separated preheated raw materials to the raw material supply system of the cement kiln, the conventional mixture is placed in the duct between the bottom of the cement kiln and the calciner.
- the amount of preheated material used can also be reduced because the organic sludge is dried using preheated material at a high temperature of approximately 800°C taken from the calciner. can.
- the separation device is a screw conveyor from which the upper half of the casing has been removed, and the longitudinal opening edge of the casing is extended along the wall surface of the raw material flow section of the calciner.
- the organic sludge treatment device may include an introduction device that introduces exhaust gas containing dust, odor, and water vapor from the mixing device into the gas outlet section of the lowest cyclone of the cement firing device, and This makes it possible to treat odor gas while effectively using it for denitration of cement kiln exhaust gas.
- exhaust gas is returned to the calcining furnace or cement kiln, it will result in heat loss during calcination, but in the present invention, heat loss is minimized because it is returned to the gas outlet of the lowest stage cyclone (exhaust gas after calcination is completed). can be suppressed to
- the temperature of the mixture at the outlet of the mixing device can be set to 100°C or higher, thereby making it possible to dry the organic sludge to a moisture content of 5% by mass or less without generating an odor, and also to avoid problems caused by moisture condensation during transportation. can be prevented.
- the present invention also provides a method for treating organic sludge, in which organic sludge is mixed with a preheated raw material separated from a calciner of a cement firing device, and the organic sludge is dried using the sensible heat of the preheated raw material. , characterized in that the mixture is supplied to a raw material supply system of the cement firing apparatus.
- the conventional mixture in order to return the mixture of dried organic sludge and separated preheated raw materials to the raw material supply system of the cement kiln, the conventional mixture is placed in the duct between the bottom of the cement kiln and the calciner.
- the amount of preheated material used can also be reduced because the organic sludge is dried using preheated material at a high temperature of approximately 800°C taken from the calciner. can.
- exhaust gas containing dust, odor, and water vapor generated during mixing of the organic sludge and the preheated raw material can be introduced into the gas outlet section of the lowest cyclone of the cement firing device, and the sludge
- the ammonia component contained in the odor gas generated by drying can be effectively used for denitration of cement kiln exhaust gas.
- FIG. 1 is a schematic diagram showing an embodiment of an organic sludge treatment apparatus according to the present invention.
- FIG. 2 is a schematic cross-sectional view showing an installation example of a separation device of the organic sludge treatment device shown in FIG. 1.
- FIG. 1 is a schematic diagram showing an embodiment of an organic sludge treatment apparatus according to the present invention.
- FIG. 2 is a schematic cross-sectional view showing an installation example of a separation device of the organic sludge treatment device shown in FIG. 1.
- FIG. 2 is a schematic cross-sectional view showing an installation example of a separation device of the organic sludge treatment device shown in FIG. 1.
- FIG. 1 shows a cement firing apparatus equipped with an organic sludge treatment apparatus according to the present invention.
- a fractionating device 5 separates a part of the preheated raw material R1 descending through the calciner 3, and the separated preheated raw material R2 is mixed with the organic sludge S supplied from the organic sludge supply device 6. It also includes a mixing device 8 for drying the organic sludge S.
- the preheater 4 has four or five stages of cyclones, but in FIG. 1, illustration of a device located above the three-stage cyclones 4C1 and 4C2 is omitted.
- Organic sludge S refers to sewage sludge, paper manufacturing sludge, building pit sludge, food sludge, and the like.
- the fractionation device 5 for example, a screw conveyor in which the upper half of the casing 5a (the upper half of the cylindrical casing) is removed to open the upper part can be used.
- the sorting device 5 extends the longitudinal opening edge 5b of the casing 5a that passes through the calciner 3 along the wall surface 3a of the flow section of the preheated raw material R1 of the calciner 3. . Since the preheated raw material R1 flowing along the wall surface 3a is smoothly introduced into the fractionating device 5, stable operation can be maintained without pulsating the fractionated amount. Note that it is also possible to use a fractionator having a configuration other than the above.
- the mixing device 8 is a pug mill or the like in which a large number of blades 8b are attached to a horizontal shaft 8a, and the blades 8b also rotate by rotating the horizontal shaft 8a. Mixing and drying and transporting the preheated raw materials R2 are performed simultaneously.
- the mixing device 8 is not limited to the one described above, and other types of devices that can dry the organic sludge S using the sensible heat of the preheated raw material R2 obtained by separating the organic sludge S can also be employed.
- the mixing device 8 is provided with an introduction device that introduces the exhaust gas G containing dust, odor, and water vapor from the mixing device 8 into the gas outlet of the lowermost cyclone (in the illustrated example, the lowermost cyclone 4A2). It will be done.
- the organic sludge S is supplied to the mixing device 8 via the organic sludge supply device 6, and a part of the preheated raw material R1 descending through the calciner 3 is fractionated by the fractionating device 5. , the separated preheated raw material R2 is introduced into the mixing device 8 and the organic sludge S is dried.
- the fractional amount of preheated raw material R2 can be instantly adjusted by changing the rotation speed of the screw conveyor of the preparative separation device 5, and even when the supply amount of organic sludge S changes, the fraction of preheated raw material R2 can be adjusted immediately. It is possible to respond by immediately adjusting the intake amount, and stable processing becomes possible.
- the organic sludge S and the preheated raw material R2 are conveyed while being mixed and stirred for preferably about 1 to 5 minutes, and the organic sludge S is heated and dried by the sensible heat of the separated preheated raw material R2.
- the preheated raw material R1 that has not been separated is decarboxylated in the calciner 3 and the lowermost cyclones 4A1 and 4A2 as usual, and then fired in the cement kiln 2 to produce cement clinker.
- Table 1 shows the relationship between the moisture content (% by mass) and the odor of the mixture M of the organic sludge S dried as described above and the preheated raw material R2.
- the moisture content was measured in accordance with JIS Z 7302-3 "Waste solidified fuel - Part 3: Moisture test method". That is, when the sample was heated and dried at 107 ⁇ 2° C. for 1 hour, the difference in mass before and after drying was defined as the water content as a mass percentage with respect to the sample.
- odor intensity was measured using the following procedure. (1) Seal 100 g of sample in a 1 L plastic container. (2) Stand still for 1 hour in a constant temperature environment of 30°C. (3) Using a flex pump, collect the gas in the plastic container containing the sample into a 3L gas bag. (4) The strength of the odor of the gas in the sampled gas bag is measured using an odor sensor (NeoSigma manufactured by Calmor Co., Ltd.).
- the odor intensity at which humans can tolerate discomfort is 600 or less.
- the moisture content at which the odor intensity is 600 is 5% by mass, and in order to keep the moisture content of the mixture M at 5% by mass or less, the temperature of the mixture M at the outlet of the mixing device 8 is set to 100° C. or higher.
- the organic sludge (mixture M) can be dried to a moisture level that does not generate an odor, and handling properties during transportation can be improved.
- the mixture M Since the mixture M has been dried to a moisture content of 5% by mass or less without generating an odor, it can be returned to the raw material supply system of the cement firing device 1, that is, from the raw material storage area to the raw material supply device to the preheater 4. As a result, the heat loss that conventionally occurs when the mixture M is returned to the duct or the like between the kiln bottom of the cement kiln 2 and the calciner 3 can be reduced by about 50 kJ/kg-cli. Furthermore, since the organic sludge is dried using preheated raw material at a high temperature of about 800° C. taken from the calciner, the amount of preheated raw material used can also be reduced.
- the exhaust gas G containing dust, odor, and water vapor from the mixing device 8 is returned to the gas outlet of the lowest stage cyclone 4A2 of the cement firing device 1, and the odor gas generated by drying the organic sludge S is used for denitration of the cement kiln exhaust gas. Process while making effective use of it. Furthermore, if the exhaust gas G is returned to the calcination furnace 3 or the cement kiln 2, it will result in heat loss during calcination, but in the present invention, the exhaust gas G is returned to the gas outlet section of the lowest stage cyclone 4A2 (exhaust gas after calcination is completed). Loss is minimized. 1 Cement firing device 2 Cement kiln 3 Calcining furnace 4 Preheater 5 Separation device 6 Organic sludge supply device 8 Mixing device G Exhaust gas M Mixture R1, R2 Preheating raw material S Organic sludge
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
Le problème décrit par la présente invention concerne le traitement de boues organiques tout en maintenant un fonctionnement stable et en réduisant les pertes thermiques et une fraction de la quantité. La solution consiste en un appareil de traitement des boues organiques comprenant : un dispositif de fractionnement (5) qui reçoit une fraction d'un matériau préchauffé (R1) provenant d'un four de calcination (3) d'un dispositif de cuisson de ciment (1) ; un dispositif de mélange (8) qui mélange les boues organiques (S) avec le matériau préchauffé (R2) reçu par le dispositif de fractionnement, et qui sèche les boues organiques en utilisant la chaleur sensible du matériau préchauffé ; et un dispositif d'alimentation qui fournit un mélange (M) provenant du dispositif de mélange à un système d'alimentation en matières premières du dispositif de cuisson du ciment. Le dispositif de fractionnement est un convoyeur à vis doté d'une enveloppe dont la moitié supérieure a été retirée. Une partie de bord d'ouverture dans le sens longitudinal du boîtier peut être déployée le long d'une surface de paroi d'une partie d'écoulement de matière première du four de calcination. Un dispositif d'introduction qui introduit un gaz d'échappement contenant de la poussière, des odeurs et de la vapeur d'eau provenant du dispositif de mélange dans une sortie de gaz d'un cyclone inférieur (4A2) du dispositif de cuisson du ciment peut être fourni.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2022/016013 WO2023188114A1 (fr) | 2022-03-30 | 2022-03-30 | Appareil et procédé de traitement de boues organiques |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2022/016013 WO2023188114A1 (fr) | 2022-03-30 | 2022-03-30 | Appareil et procédé de traitement de boues organiques |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023188114A1 true WO2023188114A1 (fr) | 2023-10-05 |
Family
ID=88200304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2022/016013 WO2023188114A1 (fr) | 2022-03-30 | 2022-03-30 | Appareil et procédé de traitement de boues organiques |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2023188114A1 (fr) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0398700A (ja) * | 1989-09-11 | 1991-04-24 | Onoda Cement Co Ltd | 下水汚泥の資源化システム |
| JP2000176492A (ja) * | 1998-12-15 | 2000-06-27 | Taiheiyo Cement Corp | 汚泥処理方法、及びセメントクリンカー焼成装置 |
| JP2013173651A (ja) * | 2012-02-27 | 2013-09-05 | Taiheiyo Cement Corp | バイオマス系廃棄物の利用方法及びセメント原燃料化装置 |
| WO2019193938A1 (fr) * | 2018-04-04 | 2019-10-10 | 太平洋エンジニアリング株式会社 | Dispositif et procédé de traitement de déchets organiques |
-
2022
- 2022-03-30 WO PCT/JP2022/016013 patent/WO2023188114A1/fr active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0398700A (ja) * | 1989-09-11 | 1991-04-24 | Onoda Cement Co Ltd | 下水汚泥の資源化システム |
| JP2000176492A (ja) * | 1998-12-15 | 2000-06-27 | Taiheiyo Cement Corp | 汚泥処理方法、及びセメントクリンカー焼成装置 |
| JP2013173651A (ja) * | 2012-02-27 | 2013-09-05 | Taiheiyo Cement Corp | バイオマス系廃棄物の利用方法及びセメント原燃料化装置 |
| WO2019193938A1 (fr) * | 2018-04-04 | 2019-10-10 | 太平洋エンジニアリング株式会社 | Dispositif et procédé de traitement de déchets organiques |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI114393B (fi) | Menetelmä ja laitos sementtiklinkkerin valmistamiseksi | |
| US8607469B2 (en) | Cement burning apparatus and method of drying high-water-content organic waste | |
| US5199987A (en) | Method of producing cement clinker | |
| WO2005123885A1 (fr) | Procede et appareil de sechage de bio-solides mouilles a l'aide de l'exces de chaleur recupere d'un equipement de processus de fabrication de ciment | |
| RU2756513C1 (ru) | Способ обработки шлама и система для производства цемента | |
| WO2023188114A1 (fr) | Appareil et procédé de traitement de boues organiques | |
| WO2007104368A1 (fr) | Méthode de traitement de la boue produite par les procédés de taille et de polissage des pierres | |
| JP6696053B2 (ja) | 有機汚泥の処理装置及び処理方法 | |
| JP5582554B2 (ja) | セメント焼成装置 | |
| ZA200501342B (en) | Method and plant for manufacturing cement clinker | |
| US5449404A (en) | Method for manufacturing cement | |
| US20080210134A1 (en) | Precipitated Calcium Carbonate (PCC) from Sugar Processing Byproducts for use in Cementitious Applications and Methods Thereof | |
| JP7326448B2 (ja) | 脱硫剤製造方法及びセメントキルン排ガスの脱硫方法 | |
| US8636840B2 (en) | Process for utilizing organic waste materials | |
| WO2014150695A1 (fr) | Utilisation de chaleur résiduelle de four pour réduire la teneur en humidité de biosolides de classe a et d'autres combustibles de biomasse | |
| JP2024070378A (ja) | 有機汚泥処理装置の制御方法 | |
| JP6151147B2 (ja) | 含水有機廃棄物の処理装置及び処理方法 | |
| RU2777126C1 (ru) | Способ обработки шлама и система для производства цемента | |
| JPH1142500A (ja) | 有機質含有汚泥の処理方法 | |
| SU1643496A1 (ru) | Способ получени цементного клинкера | |
| SU933000A3 (ru) | Установка дл обжига влажного цементного сырь |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 2023504546 Country of ref document: JP |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22935260 Country of ref document: EP Kind code of ref document: A1 |