WO2007006218A1 - Séchoir, procédé et équipement destinés au séchage et à l’incinération de boues humides utilisant avec le sechoir un lit fluidisé en circulation - Google Patents

Séchoir, procédé et équipement destinés au séchage et à l’incinération de boues humides utilisant avec le sechoir un lit fluidisé en circulation Download PDF

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Publication number
WO2007006218A1
WO2007006218A1 PCT/CN2006/001610 CN2006001610W WO2007006218A1 WO 2007006218 A1 WO2007006218 A1 WO 2007006218A1 CN 2006001610 W CN2006001610 W CN 2006001610W WO 2007006218 A1 WO2007006218 A1 WO 2007006218A1
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WO
WIPO (PCT)
Prior art keywords
chamber
dryer
sludge
wet sludge
outlet
Prior art date
Application number
PCT/CN2006/001610
Other languages
English (en)
Chinese (zh)
Inventor
Qinggang Lu
Yongjie Na
Xiaoyin Yun
Ming Gao
Yunkai Sun
Jun He
Shaolin Bao
Weihong Jiao
Renxiong Ma
Dongyu Wang
Yumei Yong
Original Assignee
Institute Of Engineering Thermophysics, Chinese Academy Of Sciences
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from CNB2005100828253A external-priority patent/CN100447102C/zh
Priority claimed from CNB2005101029652A external-priority patent/CN100396994C/zh
Application filed by Institute Of Engineering Thermophysics, Chinese Academy Of Sciences filed Critical Institute Of Engineering Thermophysics, Chinese Academy Of Sciences
Priority to JP2008519785A priority Critical patent/JP4839371B2/ja
Publication of WO2007006218A1 publication Critical patent/WO2007006218A1/fr

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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
    • C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/02—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment
    • F23G5/04—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment drying
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/30—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having a fluidised bed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • 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
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing

Definitions

  • the present invention relates to a dryer, a waste incineration treatment apparatus and a treatment method, and more particularly to a particle dryer and a wet sludge incineration treatment apparatus and method using the particle dryer.
  • Sludge is a solid residue after sewage treatment, and the amount of sludge accounts for about 3% of the sewage treatment. ⁇ 5%. (in terms of water content of 97%).
  • the amount of industrial and domestic sewage treatment in China is increasing rapidly. With the continuous construction of sewage treatment plants, more sludge will be produced.
  • the composition of the sludge is very complicated. In addition to containing a large amount of water, it also contains common organic matter, refractory organic matter, various trace elements, pathogenic microorganisms, parasite eggs, heavy metals and other components.
  • the sludge treatment method with incineration as the core process can meet the requirements of reduction, stabilization and harmlessness to the greatest extent.
  • most of the existing sludge incineration methods require special equipment to dry the sludge and then incinerate it.
  • the drying and incineration are completed in two sets of equipment, and the system is complicated; the drying equipment consumes a large amount of energy. , high running cost and high safety requirements; and simple incineration of dry sludge, easy to produce NOx, need to be equipped with denitrification device after the incinerator; meanwhile, due to sulfur in the sludge, it is necessary to equip the incinerator with a desulfurization device. .
  • the unit processes such as drying, incineration and even harmless treatment of the sludge can be concentrated in a single unit at the same time, simplifying the sludge incineration treatment process , to reduce the cost of treatment; but the moisture contained in the wet sludge will be discharged along with the high-temperature flue gas generated by the incineration, taking away a lot of heat, so a large amount of auxiliary fuel needs to be added to achieve energy balance.
  • the object of the present invention is to provide a particle dryer in which a heat carrier and a wet sludge can be simultaneously added, and the wet sludge is directly mixed with a heat carrier in the particle dryer for heat exchange, and the wet sludge is Heating, wherein the water is evaporated to achieve drying, the wet sludge is in a fluidized state during the drying process, and the evaporated water is discharged to the dryer with the fluidizing gas, and the dried sludge is discharged together with the heat carrier to the particle dryer.
  • the object of the present invention is to provide a circulating fluidized bed wet sludge drying incineration treatment method with a particle dryer, which combines the drying and incineration of sludge and concentrates in a single circulating fluidized bed device. get on, The heat required for the drying of the wet sludge comes directly from the combustion of the sludge and the auxiliary fuel, and the dried sludge is sent back to the furnace for incineration.
  • a third object of the present invention is to provide a circulating fluidized bed wet sludge drying incineration treatment device with a particle dryer, which is an integrated device capable of organically combining sludge drying and incineration.
  • the heat required for the drying of the wet sludge is directly derived from the heat released by the combustion of the sludge and the auxiliary fuel, and the dried sludge is incinerated in the furnace.
  • the particle dryer provided by the present invention comprises: a cavity 600, a wet sludge inlet port 609, an exhaust port 610 and a dry sludge outlet 611; the lower portion of the cavity 600 is horizontally mounted.
  • the air duct 630 is provided with a windshield 620 provided with a hood 621; the cavity 600 is further provided with a hot ash inlet 613, and the hot ash inlet 613 is located on the bottom wall or the side wall of the cavity 600.
  • the dry sludge outlet 611 is disposed in the middle of the outer side wall of the cavity 600 opposite the hot ash inlet 613.
  • the lower part of the inner cavity of the cavity 600 is provided with a longitudinal outlet partition 607 fixed on the bottom wall of the cavity 600 and the side walls of the cavity 600.
  • the outlet partition 607 partitions the cavity 600 into an outlet chamber 604 and has a hot ash inlet 613.
  • the heat exchange chamber 602; the dry sludge outlet 611 is disposed at the bottom of the outlet chamber 604.
  • the wet sludge inlet port 609 is located on the side of the chamber 600 that is biased toward the hot ash inlet 613.
  • the vent 610 is located on the side of the chamber 600 that is biased toward the dry sludge outlet 611.
  • the cavity 600 is a bubbling fluidized bed having a fluidization velocity of 0.3 to 0.8 m/s.
  • the wet sludge is added from the wet sludge inlet port 609 at the top of the cavity 600 of the dryer, and the high temperature hot ash entering from the hot ash inlet 613 supplies heat to the dryer, and the wet sludge is in a fluidized state during the falling process.
  • the hot ash is directly blended so that the wet sludge is dried and granulated.
  • the dried sludge is discharged from the dry sludge outlet 611 together with the cooled hot ash, and the water evaporated from the wet sludge is discharged from the exhaust port 6 ⁇ 0 with the fluidizing gas, and the exhaust gas can be used as a dust removal and dehumidification. Fluidized gas recycling.
  • the wet sludge drying incineration treatment method provided by the invention is dried in a circulating fluidized bed incinerator or a circulating fluidized bed boiler to incinerate wet sludge having a moisture content of 60 to 90%, in a circulating fluidized bed.
  • a particle dryer is arranged in the warm cycle ash circuit, and the high temperature circulating ash separated by the cyclone separator is directly returned to the furnace and the other part enters the particle dryer; the wet sludge is directly mixed with the high temperature circulating ash in the particle dryer, and is heated. After drying to a dry sludge having a water content of 5 to 20%, it is returned to the furnace together with the circulating ash for incineration.
  • the particle dryer is of a bubbling fluidized bed type, and a fluidizing gas is introduced into the bottom.
  • the high-temperature circulating ash entering the particle dryer is adjusted by a hot ash distribution valve, and the exhaust temperature of the particle dryer is controlled at 80 to 150 °C. Can pass
  • the adjustment of the exhaust gas temperature of the particle dryer by the hot ash distribution valve is enhanced by adding an inert bed material to the circulation loop to increase the total circulating ash amount. After the dust of the particle dryer is dedusted and dehumidified, it is sent back to the particle dryer for circulation as a fluidizing gas, or sent to the furnace for incineration.
  • the method of the invention provides a bubbling fluidized bed type particle dryer in a high temperature circulating ash circulation loop of a circulating fluidized bed incinerator or a circulating fluidized bed boiler, and the high temperature circulating ash separated by the cyclone separator is mechanically or pneumatically controlled Hot ash distribution valve, one part enters the returning device and returns directly to the furnace, and the other part enters the particle dryer; the wet sludge with water content between 60 ⁇ 90% is broken up by the dispersing device and is set from the particle dryer The wet sludge is added to the inlet; the high-temperature circulating ash entering the particle dryer is adjusted by the hot ash distribution valve, and the particle dryer exhaust temperature can be controlled at 80 to 150 ° C to ensure that the wet sludge does not pyrolyze, Gasification, inhibiting the production of CO, preventing explosion; wet sludge is directly mixed with circulating ash in the particle dryer, heated, the water content is evaporated, and the wet sl
  • the dried sludge is returned to the furnace by mechanical conveying or pneumatic means together with the circulating ash; for drying the incinerated wet sludge by using a circulating fluidized bed incinerator with an insulated furnace
  • the auxiliary sludge can be cleaned without the auxiliary fuel, and the furnace can be kept to ensure the complete combustion of the sludge.
  • the evaporator is evaporated out, and the fluidized gas is taken out from the top of the particle dryer; the particulate dryer exhausts the fine powder and dust through the fine powder separator, the cooler condenses the condensed water, and then is pressurized by the fan.
  • the particle drier fluidized gas is sent back to the particle dryer for recycling, or sent to the furnace for incineration; the fine powder and dust separated by the fine powder separator are mechanically transported. Pneumatic loopback mode by incineration furnace, the cooler condensate condensed back to the sewage treatment plant.
  • the method of the invention can also be used for mixing circulating wet sludge in a conventional circulating fluidized bed coal-fired boiler, adding a particle dryer in the circulating fluidized bed boiler, and replacing the returning device with a hot ash distribution valve through a hot ash distribution valve Part of the hot ash is sent from the high-temperature circulating ash circuit of the boiler to the particle dryer, the wet sludge is added from the particle dryer, directly mixed with the wet sludge, the wet sludge is dried, and the dried sludge is The circulating ash is sent back to the furnace for incineration; the particle dryer is taken out and dedusted, dehumidified, recycled or sent to the furnace for incineration.
  • the wet sludge incineration treatment device with a particle dryer comprises: a circulating fluidized bed incinerator furnace 1, a high temperature gas-solid separator 2 and a tail flue 3, which are sequentially connected in an upper portion thereof, and a hot ash distribution back Material valve 4,
  • the sludge dispersing device 5, the particle dryer 6 and the dryer exhaust gas treatment system 7 composed of the connected fine powder separator 71, the cooler 72, the steam separator 73 and the fan 74, are:
  • the hot ash distribution return valve 4 is located below the high temperature gas-solid separator 2, the inlet is connected to the separator material leg 21, and the outlet is connected to the incinerator furnace 1 and the particle dryer 6, respectively, and the specific structure is - in the separator material
  • a vertical diverter plate 402 is disposed directly below the leg 21, and the two sides of the vertical diverter plate 402 are respectively disposed with the upper portion communicating with the hot ash distribution return valve at the same level.
  • the first feeding chamber 403 and the second feeding chamber 405 The vertical splitter plate 402 divides the projection of the separator legs 21 on the bottom surfaces of the first feed chamber 403 and the second feed chamber 405 into two portions; further comprising a first discharge chamber 404 and a second discharge chamber 406
  • the first discharge chamber 404 and the second discharge chamber 406 are respectively provided with a first overflow port 407 and a second overflow port 408, and the first overflow port 407 and the second overflow port 408 are at the same level. Height
  • the first feeding chamber 403 communicates with the bottom of the first discharging chamber 404 through the first horizontal hole 409, and the upper portion of the first discharging chamber 404 communicates with the incinerator furnace 1 through the first overflow opening 407;
  • the second feeding chamber 405 is in communication with the bottom of the second discharge chamber 406 through the second horizontal hole 410;
  • the first horizontal hole 409 and the top end of the second horizontal hole 410 are at the same level;
  • the top end of the vertical splitter 402 is not lower than the top of the first horizontal hole 409 And not higher than the bottom end of the first overflow port 407;
  • the first discharge chamber 404, the first feed chamber 403, the second feed chamber 405 and the second discharge chamber 406 are provided with a hood with a hood a plenum corresponding to the first discharge chamber 404, the first feed chamber 403, the second feed chamber 405, and the second discharge chamber 406 respectively disposed under the air distribution plate, and the flow rate in the air chamber is adjustable
  • the particle dryer 6 communicates with the hot ash distribution return valve 4 through the second overflow port 408, and has a specific structure: is disposed in the particle dryer 6 near the second overflow port 408 of the hot ash distribution return valve 4.
  • An air distribution plate with a hood is disposed on the bottom surface of the 602, and a wind chamber corresponding to the inlet chamber 601 and the heat exchange chamber 602 is disposed under the air distribution plate, and a fluidizing gas with adjustable flow rate is introduced into the air chamber;
  • the fluidizing gas is an inert gas or a cooled incinerator flue gas having a fluidization rate of 0.4 to 1.5 m/s; a heat sludge chamber 602 is provided near the in
  • the sludge dispersing device 5 is a mechanical or pneumatic sludge dispersing device, and is connected to the particle dryer 6 through the wet sludge adding port 609;
  • a dry sludge outlet 611 is disposed on the particle dryer 6 away from the second overflow port 408, and the dry sludge outlet 611 passes through the dry sludge returner 612 or the first screw feeder 613 and the incinerator furnace 1 Connected; particle drying The exhaust port 610 of the device 6 is in communication with the dryer exhaust treatment system 7;
  • the fine powder outlet of the fine powder separator 71 of the dryer exhaust treatment system 7 is connected to the incinerator furnace 1 through the fine powder feeder 711 or the second screw feeder 712, and the dirt separated from the dryer exhaust gas The fine powder is sent back to the incinerator furnace 1.
  • the dry sludge outlet 611 is disposed on the side wall of the heat exchanger chamber 602 of the particle dryer 6 away from the second overflow port 408, and the bottom end thereof is equal to the bottom end of the second overflow port 408; the dry sludge outlet 611
  • the dry sludge returner 612 is connected to the incinerator furnace 1 and the dried sludge and the cooled circulating ash are sent back to the incinerator furnace 1 via the dry sludge returner 612.
  • an outlet partition 607 is provided in parallel with the inlet partition 605, and an outlet chamber 604 is partitioned in the heat exchange chamber 602.
  • the outlet chamber 604 An air distribution plate with a hood is disposed on the bottom surface, a wind chamber corresponding to the outlet chamber 604 is disposed under the air distribution plate, and a fluidizing gas with adjustable flow rate is introduced into the air chamber; the heat exchange chamber 602 is separated by the outlet partition wall 607.
  • the top of the outlet partition 607 is connected to the bottom end of the second overflow opening 408; the dry sludge outlet 611 is disposed on the bottom surface of the outlet chamber 604, and is connected to the incinerator furnace 1 through the first screw feeder 613.
  • the dried sludge and the cooled circulating ash are sent back to the incinerator furnace 1 via the first screw feeder 613.
  • the vertical splitter plate 402 has a ratio of the area of the two portions into which the projection of the separator feed leg 21 on the bottom surfaces of the first feed chamber 403 and the second feed chamber 405 is 0.25 to 4.0.
  • the fan 74 outlet of the dryer exhaust treatment system 7 is connected to the bottom plenum of the heat exchange chamber 602 of the particle dryer 6 through the pilot gas line 741.
  • the outlet of the fan 74 of the dryer exhaust treatment system 7 is provided with a branch line 742 connected to the incinerator furnace 1 .
  • Dryer Exhaust Treatment System The inlet of the fine powder 'returner 711 or the second screw feeder 712 is provided with an inert bed material inlet 713.
  • the principle of the wet sludge incineration treatment apparatus with particle dryer of the present invention is:
  • the high-temperature circulating ash separated in the circulating fluidized bed incinerator cyclone separator is distributed by the hot ash distribution return valve, one part is directly returned to the furnace, and the other part enters the particle dryer; the wet sludge with water content between 60 ⁇ 90% After being dispersed by the dispersing device, it is added from the wet sludge inlet port provided on the particle dryer; the particle dryer is a bubbling fluidized bed type, the bottom is filled with fluidizing gas, and the hot ash distribution return valve is branched to the particle dryer.
  • the high temperature circulating ash is directly blended with the wet sludge to heat and dry the wet sludge.
  • the circulating ash can be directly returned to the furnace and into the particle dryer. Allocation, thus controlling The high-temperature circulating ash entering the particle dryer, the particle dryer exhaust temperature is controlled at 80 ⁇ 15 (TC, and provides enough heat to dry the wet sludge to a moisture content of 5 ⁇ 20%, together with the circulating ash Returned to the furnace through the return feeder for incineration.
  • the gas pressures of the first overflow port and the second overflow port are not equal, and the circulating ash can be balanced to return directly to the furnace through the position of the splitter plate.
  • the hot ash direct return port is higher than the dry sludge return port, the first overflow port pressure is lower, and the splitter plate divides the splitter material legs on the first feed chamber and the second feed chamber bottom surface. The ratio of the area of the two parts should be less than 1; otherwise it should be greater than 1.
  • the particle dryer Most of the moisture content of the wet sludge is evaporated in the particle dryer, and the fluidized gas is taken out from the top of the particle dryer with the particle dryer; the particle dryer exhausts the fine powder and dust through the fine powder separator, and the cooler After condensing the condensed water, it is pressurized by a fan, sent to the particle dryer as a particle dryer fluidized gas for recycling, and partially sent to the furnace for incineration; the fine powder and dust separated by the fine powder separator are mechanically transported or pneumatically The method is sent back to the furnace for incineration, and the condensed water condensed by the cooler is sent back to the sewage treatment plant for treatment.
  • the drying process of the wet sludge is carried out in a particle dryer, and the wet sludge is dried by the heat generated by the high temperature circulating ash and the combustion of the auxiliary fuel, and the wet sludge is dried to a moisture content of 5 to 20 % of the granular dry sludge is returned to the furnace together with the circulating ash for incineration.
  • the high temperature flue gas produced by incineration contains only a small amount of water vapor; most of the moisture in the wet sludge is from the outlet of the particle dryer in the form of water vapor. Discharge, water vapor is condensed into water in the cooler, and can be sent back to the sewage treatment plant for treatment.
  • the dehumidification and dehumidification of the particle dryer can be recycled in a closed cycle or sent to the furnace for incineration to avoid sludge drying.
  • the odorous gas generated during the discharge is discharged into the environment.
  • the particle dryer provided by the invention has the following advantages:
  • the wet sludge is directly exchanged with the hot ash in a fluidized state in a particle dryer, and the heat of the hot ash is utilized to heat the wet sludge, so that the moisture of the wet sludge is evaporated to achieve drying, and the evaporated water is water.
  • the vapor form is discharged to the dryer with the fluidizing gas, so that the wet sludge with high water content can be quickly dried to a moisture content of less than 20%, and the dried sludge is discharged to the incinerator together with the hot ash. Burning.
  • the circulating fluidized bed wet sludge drying incineration treatment method and treatment device with particle dryer provided by the invention has the following advantages: Breaking through the first drying and re-incineration, and the two processes independently performing the mold 5 to dry the sludge It is combined with incineration and concentrated in a single unit, which greatly simplifies the drying and incineration process of wet sludge and simplifies the drying and incineration equipment.
  • the heat required for drying the wet sludge comes directly from the sludge and auxiliary fuel. Heat of combustion
  • the particles are in direct contact with the wet sludge in the particle dryer, and are fully blended to enhance heat transfer, so that the wet sludge is quickly heated and dried.
  • the incinerator adopts a method of circulating fluidized combustion, which has the functions of suppressing NOx generation and desulfurization. Most of the moisture contained in the wet sludge is no longer discharged with the high-temperature flue gas generated by the incineration, but is concentrated in the low-temperature gas discharged from the particle dryer, which reduces the heat loss of the system and reduces the consumption of auxiliary fuel in the incinerator. Or increase the upper limit of the moisture content of the wet sludge that can be independently burned without adding auxiliary fuel; the gas generated in the sludge drying can be recycled or sent to the furnace for incineration, so that no emissions are discharged during the treatment. Odorous gas.
  • the particle dryer provided by the present invention and the wet sludge incineration treatment device with the particle dryer can be used for drying of waste water with high water content such as sludge, such as urban sewage sludge, paper sludge, and petrochemical industry sludge. Etc., can also be used for the drying of concentrated leachate in landfills.
  • FIG. 1 is a schematic view of a particle dryer of Embodiment 1 of the present invention.
  • Figure 2 is a view of the A-A ⁇ of the particle dryer of the embodiment of the present invention.
  • Figure 3 is a schematic view of a particle dryer of Embodiment 2 of the present invention.
  • Figure 4 is a cross-sectional view showing the B-B of the particle dryer of the embodiment of the present invention.
  • Figure 5 is a schematic view showing a wet sludge incineration treatment method with a particle dryer in Example 3 of the present invention.
  • Figure 6 is a schematic view showing a wet sludge incineration treatment method with a particle dryer in Example 4 of the present invention.
  • Figure 7 is a schematic view showing a wet sludge incineration treatment apparatus with a particle dryer according to Embodiment 5 of the present invention.
  • Figure 8 is a schematic view showing a hot ash distributing valve and a particle dryer of a wet sludge incineration treatment apparatus with a particle dryer in Example 5 of the present invention.
  • Figure 9 is a schematic view of a wet sludge incineration treatment apparatus with a particle dryer according to an embodiment of the present invention.
  • Figure 10 is a schematic view showing a hot ash distributing valve and a particle dryer of a wet sludge incineration treatment apparatus with a particle dryer according to an embodiment of the present invention.
  • the particle dryer of the first embodiment has the following structure, and includes:
  • a rectangular parallelepiped cavity 600 the lower part of the inner cavity is horizontally installed with the air duct 630, and the lower part of the cavity is provided with a longitudinal outlet partition wall 607 to divide the cavity into the heat exchange chamber 602 and the outlet chamber 604;
  • the heat exchange chamber 602 is provided with hot ash
  • the outlet chamber 604 is provided with an exhaust port 610 on the top cover and a dry sludge outlet 611 at the bottom.
  • Hot gray The inlet 613 is located at one end of the bottom of the heat exchange chamber 602 away from the outlet partition 607, and has two.
  • the wet sludge addition port 609 is located on the side of the heat exchange chamber 602 that is biased toward the hot ash inlet 613.
  • the vent 610 is located on the side of the outlet chamber 604 that is biased toward the dry sludge outlet 32.
  • the fluidization rate of the heat exchange chamber 602 is 0.5 m/s, and the fluidization velocity of the outlet chamber 604 is 0.4 m/ s , and both chambers are bubbling fluidized beds.
  • the wet sludge is added from the wet sludge addition port 609, and the dry sludge is discharged from the dry sludge outlet 611 with the cooled hot ash.
  • the particle dryer of the second embodiment has the following structure, and includes:
  • the chamber below the air distribution panel 620 is a fluidized air chamber 622
  • the cavity 600 is a bubbling fluidized bed; the cavity 600 is provided with a wet sludge inlet port 609, an exhaust port 610, a heat inlet 613 and a dry sludge outlet 611; the hot ash inlet 613 is located on the side wall of the cavity 600.
  • the dry sludge outlet 611 is located in the middle of the side wall opposite to the hot ash inlet 613; the wet sludge inlet 609 is located on the side of the cavity 600 that is biased toward the hot ash inlet 11.
  • the vent 610 is located on the side of the cavity 600 that is biased toward the side of the dry sludge outlet 611.
  • the fluidization velocity of the cavity 600 is 0.8 m/s.
  • Figure 5 is a schematic view of the third embodiment. It can be seen from the figure that the wet sludge incineration treatment method with the particle dryer of the third embodiment is separately dried and incinerated in a circulating fluidized bed incinerator with a moisture content of 60%.
  • wet sludge A is added from the wet sludge addition port 609 provided on the particle dryer 6, and is added by the dispersing device 5 mounted on the inlet port 609 when it is added;
  • the particle dryer 6 is set in the circulation In the circulating ash circulating circuit of the fluidized bed incinerator, the high temperature circulating ash separated by the cyclone 2 passes through the mechanical hot ash distributing valve 41, a part of which enters the returning device 42 and directly returns to the furnace 1 and the other part enters the particle dryer 6;
  • the dryer 6 is a bubbling fluidized bed type, and a fluidized gas is introduced into the bottom.
  • the inert bed material is added from the lower portion of the furnace 1 to increase the total circulation amount, and the high temperature circulating ash entering the particle dryer 6 is regulated by the hot ash distribution valve 41.
  • the amount of the particle dryer exhaust C temperature is controlled at about 80 ° C; the wet sludge A is directly mixed with the circulating ash in the particle dryer 6 and heated, the moisture is evaporated, and the wet sludge A is dried to Dry sludge B with a water content of 20%
  • the ash is returned to the furnace 1 by pneumatic means; the particle dryer exhaust C is taken out from the top thereof, the dust D is separated by the fine powder separator 71, and the condensed water E is condensed by the cooler 72, and then pressurized by the blower 74, as The particle dryer fluidized gas is sent back to the particle dryer 6 for recycling; the dust D separated by the fine powder separator 71 is sent back to the furnace for incineration, and the condensed water E condensed by the cooler 72 is sent back to
  • Figure 6 is a schematic view of the fourth embodiment. It can be seen from the figure that the wet sludge incineration treatment method with the particle dryer of the fourth embodiment adds coal to the circulating fluidized bed incinerator as the auxiliary fuel for drying and incineration moisture content.
  • the wet sludge A is added from the wet sludge addition port 609 provided on the particle dryer 6, and is added to the dispersing device 5 mounted on the inlet port 609 when it is added;
  • the particle dryer 6 is arranged in the circulating fluidized bed incinerator circulating ash circulation loop, the high temperature circulating ash separated by the cyclone separator 2 is passed through the pneumatically controlled hot ash distributing valve 41, a part of which enters the returning device 42 and directly returns to the furnace 1 and the other part enters the particle Dryer 6; particle dryer 6 is a bubbling fluidized bed type, and a fluidizing gas is introduced into the bottom; the high-temperature circulating ash amount entering the particle dryer 6 is regulated by the hot ash distributing valve 41, and the particle dryer exhaust C temperature is controlled.
  • wet sludge A is directly blended with the circulating ash in the particle dryer 6, and heated, the water content is evaporated, and the wet sludge A is dried to a dried sludge B having a water content of 15%, and Loop gray
  • the furnace drier 1 is incinerated by mechanical conveying; the particle dryer exhaust C is taken out from the top thereof, the dust D is separated by the fine powder separator 71, and the cooler 72 is condensed out of the condensed water E, and then pressurized by the blower 74, and sent
  • the furnace D is incinerated; the dust D separated by the fine powder separator 71 is sent back to the furnace 1 for incineration, and the condensed water E condensed by the cooler 72 is sent back to the sewage treatment plant for treatment.
  • the wet sludge incineration treatment apparatus with the particle dryer of the fifth embodiment includes a circulating fluidized bed incinerator furnace 1 and a high temperature gas-solid separator. 2.
  • Tail flue 3 hot ash distribution valve 4, sludge dispersing device 5, particle dryer 6, dryer exhaust treatment system 7 (including fine powder separator 71, cooler 72, steam separator 73 and fan) 74, etc.).
  • the hot ash distribution valve 4 is located below the separator 2, and the inlet is connected to the separator leg 21, and the outlet is connected to the incinerator furnace 1 and the particle dryer 6, respectively, and the specific structure is:
  • a straight splitter plate 402 is disposed directly below the separator leg 21, and the two sides of the hot ash distribution valve are respectively a first feeding chamber 403 and a second feeding chamber 405. The upper portions of the two chambers are connected, and the bottom surface is at the same level.
  • the splitter plate 402 divides the projection of the separator material leg 21 on the bottom surface of the two chambers into two parts; the first feed chamber 403 communicates with the bottom of the first discharge chamber 404 through the first horizontal hole 409, and the upper portion of the first discharge chamber 404
  • the second overflow chamber 405 communicates with the incinerator furnace through the first overflow port 407.
  • the second feed chamber 405 communicates with the bottom of the second discharge chamber 406 through the second horizontal hole 410, and the second discharge chamber 406 has a second overflow port at the upper portion. 408; the first overflow port 407 and the bottom end of the second overflow port 408 are in the same water
  • the first horizontal hole 409 and the second horizontal hole 410 are at the same level; the first discharge chamber 404, the first feed chamber 403, the second feed chamber 405, and the second discharge chamber 406 have a bottom surface.
  • the air distribution plate with the hood is respectively corresponding to the air chamber under the air chamber, and the fluidized air with adjustable flow rate is introduced.
  • a balance duct 401 is connected between the first discharge chamber 404 and the second discharge chamber 406. '
  • the top end of the splitter plate 402 is equal to the bottom end of the first overflow port 407; the area of the two portions of the splitter plate 402 that divides the projection of the separator material leg 21 on the bottom surfaces of the first feed chamber 403 and the second feed chamber 405 The ratio is 0.25.
  • the second overflow port 408 of the hot ash distribution valve 4 is in communication with the particle dryer 6, and the specific structure of the particle dryer 6 is:
  • a vertical inlet partition 605 is disposed in the particle dryer 6 near the second overflow port 408 of the hot ash distribution valve 4, and the interior of the particle dryer 6 is divided into an inlet chamber 601 and a heat exchange chamber 602; a second overflow
  • the port 408 is in communication with the upper portion of the inlet chamber 601.
  • the inlet chamber 601 and the heat exchange chamber 602 are separated by an inlet partition 605, and the bottom portions thereof communicate with each other; the bottom surfaces of the inlet chamber 601 and the heat exchange chamber 602 are hoods with hoods, respectively
  • a fluidizing gas with adjustable flow rate is introduced.
  • the fluidizing gas of the heat exchange chamber 602 is an inert gas, and the fluidization speed is 0.4 m/s.
  • the top of the change chamber 602 is adjacent to the entrance chamber 601 with a wet sludge inlet 609, and away from the inlet chamber 601 with an exhaust port 610.
  • the particle dryer 6 is provided with a mechanical sludge dispersing device 5 above the wet sludge inlet port 609, and the dispersed sludge directly falls into the particle dryer 6.
  • a dry sludge outlet 611 is disposed on the side wall of the heat exchanger chamber 602 of the particle dryer 6 away from the inlet chamber 601, and the bottom end of the dry sludge outlet 611 is equal to the bottom end of the second overflow port 408; the dry sludge outlet 611 is dried.
  • the sludge returner 612 is connected to the incinerator furnace 1 and the dried sludge and the cooled circulating ash are sent back to the incinerator furnace 1 via the dry sludge returner 612.
  • vent 610 of the particle dryer is connected to the dryer exhaust treatment system 7, and the outlet of the blower 74 of the dryer exhaust treatment system 7 is connected to the bottom plenum of the heat exchange chamber 602 of the particle dryer 6 through the fluidized gas line 741.
  • a branch line 742 is connected to the incinerator hearth 1.
  • the fine powder outlet of the fine powder separator 71 is connected to the incinerator furnace 1 through the second screw feeder 712, and the sludge fine powder separated from the dryer exhaust gas is sent back to the incinerator furnace 1; the second spiral feedstock
  • An inert bed feed port 713 is provided at the inlet of the machine 712 for adding an inert bed material such as sand during operation to improve the transport characteristics and fluidization characteristics of the sludge fine powder.
  • FIG. 9 and FIG. 10 are schematic diagrams showing the structure of Embodiment 6.
  • the wet sludge incineration treatment device comprises a circulating fluidized bed incinerator furnace 1, a high temperature gas solids separator, a tail flue 3, a hot ash distribution valve 4, a sludge dispersing device 5, a particle dryer 6,
  • the dryer exhaust treatment system 7 (including the fine powder separator 71, the cooler 72, the steam separator 73, the fan 74, and the like).
  • the hot ash distribution valve 4 is located below the separator 2, and the inlet is connected to the separator leg 21, and the outlet is connected to the incinerator furnace 1 and the particle dryer 6, respectively, and the specific structure is:
  • a vertical splitter plate 402 is disposed directly below the separator leg 21, and the two sides of the hot ash distributing valve are respectively a first feeding chamber 403 and a second feeding chamber 405. The upper portions of the two chambers are connected, and the bottom surface is at the same level.
  • the splitter plate 402 divides the projection of the separator material leg 21 on the bottom surface of the two chambers into two parts; the first feed chamber 403 communicates with the bottom of the first discharge chamber 404 through the first horizontal hole 409, and the upper portion of the first discharge chamber 404
  • the first overflow chamber 405 communicates with the incinerator furnace; the second feed chamber 405 communicates with the bottom of the second discharge chamber 406 through the second horizontal hole 410, and the second discharge chamber 406 is provided with a second overflow port 408.
  • the first overflow port 407 and the bottom end of the second overflow port 408 are at the same level; the first horizontal hole 409 and the top end of the second horizontal hole 410 are at the same horizontal degree; the first discharge chamber 404, the first feed The bottom surface of the chamber 403, the second feeding chamber 405 and the second discharging chamber 406 are all air hoods with hoods, and the lower portions respectively correspond to the air chambers, and the fluidized air with adjustable flow rate is introduced.
  • a balance duct 401 is connected between the first discharge chamber 404 and the second discharge chamber 406.
  • the top end of the splitter plate 402 is not lower than the top end of the first horizontal hole 409 and not higher than the bottom end of the first overflow port 407; the splitter plate 402 has the separator material leg 21 in the first feed chamber 403 and the second feed chamber 405 The projected area on the bottom surface is equally divided.
  • the second overflow port 408 of the hot ash distribution width 4 is in communication with the particle dryer 6, and the specific structure of the particle dryer 6 is:
  • a vertical inlet partition 605 is disposed in the particle dryer 6 near the second overflow port 408 of the hot ash distribution valve 4, and the interior of the particle dryer 6 is divided into an inlet chamber 601 and a heat exchange chamber 602; a second overflow
  • the port 408 is in communication with the upper portion of the inlet chamber 601.
  • the inlet chamber 601 and the heat exchange chamber 602 are separated by an inlet partition 605, and the bottom portions thereof communicate with each other; the bottom surfaces of the inlet chamber 601 and the heat exchange chamber 602 are hoods with hoods, respectively
  • a fluidizing gas with adjustable flow rate is introduced.
  • the fluidizing gas of the heat exchange chamber 602 is an inert gas, and the fluidization speed is 1.5 m/s.
  • the top of the heat exchange chamber 602 is provided with a wet sludge inlet port 609 near the inlet chamber 601 and an exhaust port 610 away from the inlet chamber 601.
  • the particle dryer 6 is provided with a pneumatic sludge dispersing device 5 above the wet sludge inlet port 609, and the dispersed sludge directly falls into the particle dryer 6.
  • the side of the particle dryer 6 remote from the second overflow opening 408 is provided with an outlet partition wall 607 parallel to the inlet partition wall 605, which separates the outlet chamber 604, the bottom surface of which is a hood with a hood, and the lower part corresponds to the air chamber.
  • a fluidizing gas with adjustable flow rate is introduced; the heat exchange chamber 602 and the outlet chamber 604 are separated by an outlet partition 607, and the upper portions are connected to each other.
  • the top of the outlet partition 607 is equal to the bottom end of the second overflow opening 408; the bottom of the outlet chamber 604 is provided with a dry sludge outlet 611, which is connected to the incinerator furnace 1 through the first screw feeder 613, and will be dried.
  • the mud and the cooled circulating ash are sent back to the incinerator furnace 1 via the first screw feeder 613.
  • the vent 610 of the particle dryer is connected to the dryer venting system 7, and the outlet of the fan 74 of the dryer venting system 7 is connected to the bottom plenum of the heat exchanger chamber 602 of the particle dryer 6 via a fluidizing gas line 741.
  • the fine powder outlet of the fine powder separator 71 is connected to the incinerator furnace 1 through the fine powder returner 711, and the sludge fine powder separated from the dryer exhaust gas is returned to the incinerator furnace 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Treatment Of Sludge (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

La présente invention concerne un séchoir, un procédé et un équipement destinés au séchage et à l’incinération de boues humides utilisant avec le séchoir un lit fluidisé en circulation. Des cendres chaudes et des boues humides sont acheminées ensemble dans le séchoir. Les boues humides, se trouvant dans un état fluidisé, échangent directement de la chaleur avec les cendres chaudes et sont suffisamment chauffées par les cendres chaudes dans le séchoir. Ainsi, le séchage et l’incinération des boues humides sont effectués à l’aide d’un seul équipement. Une fois séchées dans le séchoir, les boues humides retournent à la chambre d’incinération avec les cendres en circulation. Une grande quantité d’eau contenue dans les boues humides ne se rend pas dans le tube à flammes arrière avec le gaz brûlé à température élevée, au lieu de cela elle sort avec le gaz fluidisé dans le séchoir, ce qui permet de réduire la perte de chaleur. Une fois déshumidifié, le gaz sortant du séchoir est recyclé en tant que gaz fluidisé ou envoyé à la chambre d’incinération. Le procédé ne dégage aucune odeur particulière.
PCT/CN2006/001610 2005-07-08 2006-07-07 Séchoir, procédé et équipement destinés au séchage et à l’incinération de boues humides utilisant avec le sechoir un lit fluidisé en circulation WO2007006218A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2008519785A JP4839371B2 (ja) 2005-07-08 2006-07-07 粒子乾燥機と粒子乾燥機を用いたウェット汚泥焼却処理方法及び装置

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN200510082825.3 2005-07-08
CNB2005100828253A CN100447102C (zh) 2005-07-08 2005-07-08 粒子干燥器
CN200510102965.2 2005-09-16
CNB2005101029652A CN100396994C (zh) 2005-09-16 2005-09-16 一种带有粒子干燥器的湿污泥焚烧处理装置

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WO2007006218A1 true WO2007006218A1 (fr) 2007-01-18

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CN103808123A (zh) * 2014-01-26 2014-05-21 沈阳远大科技实业有限公司 带有自动返料的喷烧木屑和燃烧杂木的两用热风炉系统及使用方法
CN105953236A (zh) * 2016-05-28 2016-09-21 胡运冲 一种聚氯乙烯塑料垃圾处理方法
CN109519915A (zh) * 2018-12-25 2019-03-26 西安热工研究院有限公司 一种燃煤电站锅炉的污泥/生物质处理装置及方法
CN110748894A (zh) * 2018-07-23 2020-02-04 上海城投污水处理有限公司 一种循环流化床一体化污泥焚烧系统
CN112113224A (zh) * 2020-10-23 2020-12-22 天俱时工程科技集团有限公司 副产氯化钠盐回收设备、其专用焚烧炉及其回收方法
CN115925221A (zh) * 2022-12-21 2023-04-07 重庆地质矿产研究院 一种页岩气开采油基污泥处置装置
WO2024080582A1 (fr) * 2022-10-13 2024-04-18 주식회사 엘지화학 Procédé de séchage de poudre humide à l'aide d'un séchoir à lit fluidisé

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JP2012122623A (ja) * 2010-12-06 2012-06-28 Metawater Co Ltd 下水汚泥の乾燥焼却方法及び装置
CN111649334A (zh) * 2020-06-29 2020-09-11 华能国际电力股份有限公司 一种新型污泥干化焚烧系统及方法

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US5365889A (en) * 1992-11-13 1994-11-22 Fostyer Wheeler Energy Corporation Fluidized bed reactor and system and method utilizing same
US5630366A (en) * 1994-08-29 1997-05-20 Degremont Process for autothermal incineration of sludge and optionally in addition of household refuse
JP2001240879A (ja) * 2000-02-28 2001-09-04 Ebara Corp 脱硫方法
CN1523266A (zh) * 2003-02-20 2004-08-25 徐宝安 一种煅烧清除垃圾焚烧锅炉含二恶英飞灰的方法及装置

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Publication number Priority date Publication date Assignee Title
CN103808123A (zh) * 2014-01-26 2014-05-21 沈阳远大科技实业有限公司 带有自动返料的喷烧木屑和燃烧杂木的两用热风炉系统及使用方法
CN105953236A (zh) * 2016-05-28 2016-09-21 胡运冲 一种聚氯乙烯塑料垃圾处理方法
CN110748894A (zh) * 2018-07-23 2020-02-04 上海城投污水处理有限公司 一种循环流化床一体化污泥焚烧系统
CN109519915A (zh) * 2018-12-25 2019-03-26 西安热工研究院有限公司 一种燃煤电站锅炉的污泥/生物质处理装置及方法
CN109519915B (zh) * 2018-12-25 2024-01-23 西安热工研究院有限公司 一种燃煤电站锅炉的污泥/生物质处理装置及方法
CN112113224A (zh) * 2020-10-23 2020-12-22 天俱时工程科技集团有限公司 副产氯化钠盐回收设备、其专用焚烧炉及其回收方法
WO2024080582A1 (fr) * 2022-10-13 2024-04-18 주식회사 엘지화학 Procédé de séchage de poudre humide à l'aide d'un séchoir à lit fluidisé
CN115925221A (zh) * 2022-12-21 2023-04-07 重庆地质矿产研究院 一种页岩气开采油基污泥处置装置
CN115925221B (zh) * 2022-12-21 2024-05-17 重庆地质矿产研究院 一种页岩气开采油基污泥处置装置

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