WO2021212786A1 - Sludge co-processing integrated system and method based on hot air circulation in coal-fired power station - Google Patents

Sludge co-processing integrated system and method based on hot air circulation in coal-fired power station Download PDF

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WO2021212786A1
WO2021212786A1 PCT/CN2020/122975 CN2020122975W WO2021212786A1 WO 2021212786 A1 WO2021212786 A1 WO 2021212786A1 CN 2020122975 W CN2020122975 W CN 2020122975W WO 2021212786 A1 WO2021212786 A1 WO 2021212786A1
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hot air
sludge
coal
boiler
inlet
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PCT/CN2020/122975
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French (fr)
Chinese (zh)
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张茂龙
吕海生
宋润
郭涛
刘冠杰
张庆
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华能国际电力股份有限公司
中国华能集团清洁能源技术研究院有限公司
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Publication of WO2021212786A1 publication Critical patent/WO2021212786A1/en

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    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
    • F26B21/002—Drying-air generating units, e.g. movable, independent of drying enclosure heating the drying air indirectly, i.e. using a heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/18—Sludges, e.g. sewage, waste, industrial processes, cooling towers
    • 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
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • the invention belongs to the field of power generation, and specifically relates to an integrated system and method for sludge co-processing based on hot air circulation of coal-fired power stations.
  • the existing sludge drying co-processing device mainly refers to the use of discs, paddles or belt conveyors as the heating surface and steam as the heat source for drying.
  • the sludge can only passively migrate with the movement or rotation of the heating surface, the heat transfer efficiency is low, the equipment scale is limited, and the material rigidity is limited, and it is not easy to expand.
  • the purpose of the present invention is to provide an integrated system and method for sludge co-processing based on hot air circulation of coal-fired power stations, which solves the problem of low heat transfer efficiency in the existing sludge drying process.
  • the present invention provides an integrated system for sludge co-processing based on hot air circulation in a coal-fired power station, which includes an air preheater for the tail flue of a boiler and drying equipment, wherein an air inlet is provided on the air preheater for the tail flue of the boiler And the flue gas inlet, the flue gas inlet is connected to the flue gas outlet of the upper-level heat exchange equipment in the tail flue of the coal-fired power station boiler; The inlet and the fluidized hot air inlet of the drying equipment; the drying equipment is provided with a wet sludge inlet, a steam inlet and a dry sludge outlet.
  • the air inlet on the air preheater of the tail flue of the boiler is connected to the outlet of the boiler fan.
  • the wet sludge inlet of the drying equipment is connected with a wet sludge storage bin; a conveying system and a primary crushing device are sequentially arranged between the wet sludge storage bin and the wet sludge inlet on the drying equipment.
  • the dry sludge outlet of the drying equipment is connected with a dry sludge bin.
  • the steam inlet of the drying equipment is connected with a steam pipe arranged in the inner cavity of the drying equipment; the steam outlet of the steam pipe is connected to the steam water system of the power station.
  • the drying equipment is also provided with a hot air outlet, the hot air outlet is connected to a cyclone separation device; the dry sludge outlet of the cyclone separation device is connected to a dry sludge silo; the hot air outlet of the cyclone separation device is in turn Connect the secondary separation device, condensing equipment and boiler furnace.
  • an air distribution device is provided at the fluidized hot air inlet of the drying equipment.
  • a method for co-processing sludge based on hot air circulation in coal-fired power stations, based on the integrated system for co-processing sludge based on hot air circulation in coal-fired power stations, includes the following steps:
  • the wet sludge entering the drying equipment is dried by the steam inside the drying equipment and the fluidized hot air.
  • the hot air discharged from the drying equipment contains a large amount of fine-particle dry sludge, and most of the dry sludge is separated by the cyclone separation device to the dry sludge bin, and the remaining hot air is sent through the secondary separation device and the condensing device in turn. Into the furnace of the boiler to continue burning.
  • the present invention provides an integrated system and method for sludge co-processing based on hot air circulation of coal-fired power stations, which uses boiler hot air as the power source and auxiliary heat source, and uses hot steam as the main heat source to dry wet sludge.
  • the wet sludge is fluidized in the drying equipment, and the heat transfer area between the wet sludge and the hot air increases, and the heat transfer efficiency increases.
  • the wet sludge continuously collides and separates between particles during the fluidization process, which increases the transfer rate. Thermal disturbance effect Through the above-mentioned fluidized bed heat transfer enhancement method, the steam consumption rate of the drying equipment can be further reduced.
  • the present invention proposes that the system includes a multi-stage separation device and a multi-phase waste disposal process, which can highlight the green environmental protection characteristics of the co-processing of sludge from coal-fired power plants.
  • Fig. 1 is a system structure diagram related to the present invention.
  • the present invention provides an integrated system for sludge co-processing based on hot air circulation in coal-fired power plants, including coal-fired power plant boiler 1, boiler fan 2, boiler tail flue air preheater 3, boiler furnace 5 , Fluidized hot air inlet 6, drying equipment 7, air distribution device 8, hot air outlet 9, wet sludge storage bin 10, conveying system 11, primary crushing equipment 12, steam pipeline 13, power station steam and water system 14, cyclone separation device 15 , Dry sludge silo 16, dry sludge conveying equipment 17, secondary separation device deodorization 18, condensing equipment 19, wastewater treatment device 20 and deodorizing fan 21, among them, the upper level heat exchange in the tail flue of coal-fired power station boiler 1
  • the flue gas outlet of the equipment is connected to the flue gas inlet of the boiler tail flue air preheater 3; the medium and high temperature flue gas outlets of the boiler tail flue air preheater 3 are respectively connected to the inlet of the boiler furnace 5 and the drying equipment 7 Fluidized hot air inlet.
  • An air inlet is provided on the air preheater 3 for the tail flue of the boiler, and the air inlet is connected to the outlet of the boiler fan 2.
  • the air preheater 3 for the tail flue of the boiler is provided with a secondary tuyere 4 and the primary and secondary tuyere 4 are connected to the furnace 5 of the boiler.
  • the drying equipment 7 is provided with a wet sludge inlet, and the wet sludge inlet is connected to a wet sludge storage bin 10.
  • a conveying system 11 and a primary crushing device are sequentially arranged between the wet sludge storage bin 10 and the wet sludge inlet on the drying equipment.
  • An air distribution device 8 is provided at the fluidized hot air inlet of the drying equipment 7.
  • a steam pipe 13 is laid in the inner cavity of the drying equipment 7, and the steam port of the steam pipe 13 is connected to the power station soda system 14.
  • a discharge port is provided at the bottom of the drying equipment 7, and a dry sludge bin 16 is connected to the discharge port.
  • the top of the drying equipment 7 is provided with a hot air outlet 9; the hot air outlet 9 is connected to the inlet of the cyclone separation device 15; the dry sludge outlet of the cyclone separation device 15 is connected to the dry sludge bin 16; the cyclone separation
  • the hot air outlet of the device 15 is connected to the secondary separation device 18, the condensing device 19 and the boiler furnace 5 in sequence.
  • the wet sludge storage bin 10, the dry sludge bin 16 and the sludge conveying system 11 are all connected with a deodorizing fan 21.
  • a part of the hot air is drawn from the outlet of the air preheater 3 in the tail flue of the coal-fired power station boiler 1 as the power source of the drying system, and the remaining hot air continues to be sent into the boiler furnace 5 in the form of primary and secondary air;
  • the extracted hot air enters the drying equipment 7 evenly through the air distribution device 8 as the fluidized hot air of the drying system, and is finally discharged from the top.
  • the wet sludge enters from the wet sludge storage bin 10 through the conveying system 11 and the primary crushing equipment 12 Drying equipment 7;
  • a steam pipe 13 is laid inside the drying equipment 7, and the hot steam is provided by the power station soda system. After heat exchange, it returns to the power station soda system 14. There is a discharge port at the bottom of the drying equipment 7, which can discharge the dried sludge.
  • the top outlet hot air 9 contains a large amount of fine-particle dry sludge, and the cyclone separation device 15 separates most of the dry sludge to the dry sludge bin 16, and the remaining hot air is sent to the boiler to continue combustion after passing through the secondary separation device and condensing equipment;
  • the wet sludge bin, dry sludge bin, and sludge conveying pipeline need to be exhausted by the deodorizing fan 21, and the exhausted odor is finally sent to the boiler for combustion.
  • the outlet hot air temperature of the air preheater 3 in the tail flue of the boiler is mainly based on the operating state of the boiler. During the design, only the design working conditions of the boiler are taken, and the extracted air volume is the design value of the drying device. The treatment scale shall prevail), which will not have a major impact on the operation of the boiler;
  • the main function of the air distribution device is to distribute the air evenly, while increasing the air distribution resistance to prevent the mud in the drying device from leaking into the air supply system;
  • the primary crushing device can use a wet sludge cutter or other similar equipment.
  • This patent does not impose specific restrictions, but the description of related improvements should be within the scope of protection of this patent.
  • the steam pipeline in the drying equipment is a spiral coil or "S" tube bundle.
  • the specific design is subject to the heat exchange calculation of the drying equipment, but the description of related improvements should be within the protection scope of this patent;
  • the structure of the discharge port at the bottom of the drying equipment is similar to that of a fluidized bed boiler.
  • a feeding device (similar to a scraper feeder, screw feeder, etc.) should be installed behind the discharge port. This patent does not impose specific restrictions, but related improvements The description should be in the scope of protection of this patent.
  • the two-stage separation device can choose the bag dust removal equipment or the tube type dust removal equipment.
  • the specific conditions are subject to the site conditions. This patent does not impose specific restrictions.
  • the condensing equipment is a mature heat exchange equipment. If the condensed waste water meets the local pipe standards, it can be directly discharged into the sewage system of the power station, otherwise it can be discharged into the sewage system of the power station through a wastewater treatment device.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The present invention provides a sludge co-processing integrated system and method based on hot air circulation in a coal-fired power station. The system comprises a boiler tail flue air preheater and drying equipment. The boiler tail flue air preheater is provided with an air inlet and a flue gas inlet. The flue gas inlet is connected to a flue gas outlet of a coal-fired power station boiler. An air outlet of the boiler tail flue air preheater is separately connected to an inlet of a boiler furnace of the coal-fired power station boiler, and a fluidizing hot air inlet of the drying equipment. The drying equipment is provided with a wet sludge inlet, a steam inlet, and a dry sludge outlet. According to the present invention, the hot air of a boiler is used as a power source and an auxiliary heat source, and a heat steam is used as a main heat source to dry the wet sludge. The heat transfer disturbance effect can be increased, the heat transfer efficiency is improved, and the consumption rate of the stream of the drying equipment is reduced.

Description

一种基于燃煤电站热风循环的污泥协同处置一体化系统及方法Integrated system and method for sludge co-processing based on hot air circulation of coal-fired power station 技术领域Technical field
本发明属于发电领域，具体涉及一种基于燃煤电站热风循环的污泥协同处置一体化系统及方法。The invention belongs to the field of power generation, and specifically relates to an integrated system and method for sludge co-processing based on hot air circulation of coal-fired power stations.
背景技术Background technique
随着我国城市化的不断加深，城镇生活污水排放量自2010年的354亿吨已增长至600亿吨，相应城市污泥待处理量已增长至约4000万吨。根据国家能源局《关于开展燃煤耦合生物质发电技改试点工作的通知(2017)》，建议燃煤电站需协助处理秸秆、污泥等类型生物质燃料。As China's urbanization continues to deepen, the amount of urban domestic sewage discharge has increased from 35.4 billion tons in 2010 to 60 billion tons, and the corresponding amount of urban sludge to be treated has increased to about 40 million tons. According to the National Energy Administration's "Notice on Launching the Pilot Work for Technical Transformation of Coal-fired Coupled Biomass Power Generation (2017)", it is recommended that coal-fired power stations need to assist in processing biomass fuels such as straw and sludge.
目前，燃煤电站若大比例掺烧污泥，需先将污泥含水率干化至20％～40％方可与煤掺混，经输送系统送入锅炉焚烧。现有污泥干化协同处置装置主要指利用圆盘、桨叶或皮带机作为受热面，以蒸汽为热源，进行干化。污泥只能被动随着受热面移动或转动进行迁移，传热效率低，设备规模受限材料刚性等限制，不易扩大化。At present, if a large proportion of sludge is mixed in coal-fired power plants, the water content of the sludge must be dried to 20% to 40% before it can be mixed with coal and sent to the boiler for incineration through the conveying system. The existing sludge drying co-processing device mainly refers to the use of discs, paddles or belt conveyors as the heating surface and steam as the heat source for drying. The sludge can only passively migrate with the movement or rotation of the heating surface, the heat transfer efficiency is low, the equipment scale is limited, and the material rigidity is limited, and it is not easy to expand.
发明内容Summary of the invention
本发明的目的在于提供一种基于燃煤电站热风循环的污泥协同处置一体化系统及方法，解决了现有的污泥干化过程中，存在传热效率低的问题。The purpose of the present invention is to provide an integrated system and method for sludge co-processing based on hot air circulation of coal-fired power stations, which solves the problem of low heat transfer efficiency in the existing sludge drying process.
为了达到上述目的，本发明采用的技术方案是：In order to achieve the above objective, the technical solution adopted by the present invention is:
本发明提供的一种基于燃煤电站热风循环的污泥协同处置一体化系统，包括锅炉尾部烟道空预器和干化设备，其中，所述锅炉尾部烟道空预器上设置有空气入口和烟气入口，所述烟气入口连接燃煤电站锅炉尾部烟道上一级换热设备的烟气出口；所述锅炉尾部烟道空预器的空气出口分别连接燃煤电站锅炉的锅炉炉膛的入口、以及干化设备的流化热风入口；所述干化设备上设置有湿污泥入口、蒸汽入口和干污泥出口。The present invention provides an integrated system for sludge co-processing based on hot air circulation in a coal-fired power station, which includes an air preheater for the tail flue of a boiler and drying equipment, wherein an air inlet is provided on the air preheater for the tail flue of the boiler And the flue gas inlet, the flue gas inlet is connected to the flue gas outlet of the upper-level heat exchange equipment in the tail flue of the coal-fired power station boiler; The inlet and the fluidized hot air inlet of the drying equipment; the drying equipment is provided with a wet sludge inlet, a steam inlet and a dry sludge outlet.
优选地，所述锅炉尾部烟道空预器上的空气入口连接锅炉风机的出口。Preferably, the air inlet on the air preheater of the tail flue of the boiler is connected to the outlet of the boiler fan.
优选地，所述干化设备的湿污泥入口连接有湿污泥储仓；所述湿污泥储仓和干化设备上的湿污泥入口之间依次设置有输送系统和初级破碎设备。Preferably, the wet sludge inlet of the drying equipment is connected with a wet sludge storage bin; a conveying system and a primary crushing device are sequentially arranged between the wet sludge storage bin and the wet sludge inlet on the drying equipment.
优选地，所述干化设备的干污泥出口连接有干污泥仓。Preferably, the dry sludge outlet of the drying equipment is connected with a dry sludge bin.
优选地，所述干化设备的蒸汽入口连接有蒸汽管道，所述蒸汽管道布置在干化设备的内腔中；所述蒸汽管道的蒸汽口连接电站汽水系统。Preferably, the steam inlet of the drying equipment is connected with a steam pipe arranged in the inner cavity of the drying equipment; the steam outlet of the steam pipe is connected to the steam water system of the power station.
优选地，所述干化设备上还设置有热风出口，所述热风出口连接有旋风分离装置；所述旋风分离装置的干污泥出口连接干污泥仓；所述旋风分离装置的热风出口依次连接二级分离装置、冷凝设备和锅炉炉膛。Preferably, the drying equipment is also provided with a hot air outlet, the hot air outlet is connected to a cyclone separation device; the dry sludge outlet of the cyclone separation device is connected to a dry sludge silo; the hot air outlet of the cyclone separation device is in turn Connect the secondary separation device, condensing equipment and boiler furnace.
优选地，所述干化设备的流化热风入口处设置有布风装置。Preferably, an air distribution device is provided at the fluidized hot air inlet of the drying equipment.
一种基于燃煤电站热风循环的污泥协同处置方法，基于所述的一种基于燃煤电站热风循环的污泥协同处置一体化系统，包括以下步骤：A method for co-processing sludge based on hot air circulation in coal-fired power stations, based on the integrated system for co-processing sludge based on hot air circulation in coal-fired power stations, includes the following steps:
从燃煤电站锅炉尾部烟道空预器出口抽取一部分热空气作为干化系统动力源，同时作为干化系统的辅助热源进入干化设备，其余热风送入锅炉炉膛内；Take part of the hot air from the outlet of the air preheater in the tail flue of the coal-fired power station boiler as the power source of the drying system, and at the same time as the auxiliary heat source of the drying system to enter the drying equipment, and the remaining hot air is sent into the boiler furnace;
通过干化设备内部的蒸汽以及流化热风对进入干化设备内的湿污泥进行干化。The wet sludge entering the drying equipment is dried by the steam inside the drying equipment and the fluidized hot air.
优选地，所述干化设备排出的热风含大量细颗粒干污泥，经过旋风分离装置分离出绝大部分干污泥至干污泥仓，剩余热风依次经过二级分离装置和冷凝设备后送入锅炉炉膛继续燃烧。Preferably, the hot air discharged from the drying equipment contains a large amount of fine-particle dry sludge, and most of the dry sludge is separated by the cyclone separation device to the dry sludge bin, and the remaining hot air is sent through the secondary separation device and the condensing device in turn. Into the furnace of the boiler to continue burning.
与现有技术相比，本发明的有益效果是：Compared with the prior art, the beneficial effects of the present invention are:
本发明提供的一种基于燃煤电站热风循环的污泥协同处置一体化系统及方法，以锅炉热风作为动力源和辅助热源，以热蒸汽为主热源，对湿污泥进行干化。湿污泥在干化设备中呈现流态化，湿污泥与热空气传热面积增加，传热效率增加；同时，湿污泥在流态化过程中颗粒之间不断碰撞、分离，增加传热扰动效果通过上述流态床传热强化方式，干化设备蒸汽耗率可进一 步降低。The present invention provides an integrated system and method for sludge co-processing based on hot air circulation of coal-fired power stations, which uses boiler hot air as the power source and auxiliary heat source, and uses hot steam as the main heat source to dry wet sludge. The wet sludge is fluidized in the drying equipment, and the heat transfer area between the wet sludge and the hot air increases, and the heat transfer efficiency increases. At the same time, the wet sludge continuously collides and separates between particles during the fluidization process, which increases the transfer rate. Thermal disturbance effect Through the above-mentioned fluidized bed heat transfer enhancement method, the steam consumption rate of the drying equipment can be further reduced.
进一步的，本发明提出系统含多级分离装置及多相态废物处置工艺，可突出燃煤电站污泥协同处置的绿色环保特性。Furthermore, the present invention proposes that the system includes a multi-stage separation device and a multi-phase waste disposal process, which can highlight the green environmental protection characteristics of the co-processing of sludge from coal-fired power plants.
附图说明Description of the drawings
图1是本发发明涉及的系统结构图。Fig. 1 is a system structure diagram related to the present invention.
具体实施方式Detailed ways
下面结合附图，对本发明进一步详细说明。The present invention will be further described in detail below in conjunction with the accompanying drawings.
如图1所示，本发明提供的一种基于燃煤电站热风循环的污泥协同处置一体化系统，包括燃煤电站锅炉1、锅炉风机2、锅炉尾部烟道空预器3、锅炉炉膛5、流化热风入口6、干化设备7、布风装置8、热风出口9、湿污泥储仓10、输送系统11、初级破碎设备12、蒸汽管道13、电站汽水系统14、旋风分离装置15、干污泥仓16、干污泥输送设备17、二级分离装置除臭18、冷凝设备19、废水处理装置20和除臭风机21，其中，燃煤电站锅炉1尾部烟道上一级换热设备的的烟气出口连接锅炉尾部烟道空预器3的烟气入口；所述锅炉尾部烟道空预器3的中高温烟气出口分别连接锅炉炉膛5的入口、以及干化设备7的流化热风入口。As shown in Figure 1, the present invention provides an integrated system for sludge co-processing based on hot air circulation in coal-fired power plants, including coal-fired power plant boiler 1, boiler fan 2, boiler tail flue air preheater 3, boiler furnace 5 , Fluidized hot air inlet 6, drying equipment 7, air distribution device 8, hot air outlet 9, wet sludge storage bin 10, conveying system 11, primary crushing equipment 12, steam pipeline 13, power station steam and water system 14, cyclone separation device 15 , Dry sludge silo 16, dry sludge conveying equipment 17, secondary separation device deodorization 18, condensing equipment 19, wastewater treatment device 20 and deodorizing fan 21, among them, the upper level heat exchange in the tail flue of coal-fired power station boiler 1 The flue gas outlet of the equipment is connected to the flue gas inlet of the boiler tail flue air preheater 3; the medium and high temperature flue gas outlets of the boiler tail flue air preheater 3 are respectively connected to the inlet of the boiler furnace 5 and the drying equipment 7 Fluidized hot air inlet.
所述锅炉尾部烟道空预器3上设置有空气入口，所述空气入口连接锅炉风机2的出口。An air inlet is provided on the air preheater 3 for the tail flue of the boiler, and the air inlet is connected to the outlet of the boiler fan 2.
所述锅炉尾部烟道空预器3上设置有一、二次风口4，该一、二次风口4与锅炉炉膛5连接。The air preheater 3 for the tail flue of the boiler is provided with a secondary tuyere 4 and the primary and secondary tuyere 4 are connected to the furnace 5 of the boiler.
所述干化设备7上设置有湿污泥入口，所述湿污泥入口连接有湿污泥储仓10。The drying equipment 7 is provided with a wet sludge inlet, and the wet sludge inlet is connected to a wet sludge storage bin 10.
所述湿污泥储仓10和干化设备上的湿污泥入口之间依次设置有输送系统11和初级破碎设备。A conveying system 11 and a primary crushing device are sequentially arranged between the wet sludge storage bin 10 and the wet sludge inlet on the drying equipment.
所述干化设备7的流化热风入口处设置有布风装置8。An air distribution device 8 is provided at the fluidized hot air inlet of the drying equipment 7.
所述干化设备7的内腔中铺设有蒸汽管道13，所述蒸汽管道13的蒸汽口连接有电站汽水系统14。A steam pipe 13 is laid in the inner cavity of the drying equipment 7, and the steam port of the steam pipe 13 is connected to the power station soda system 14.
所述干化设备7的底部设置有排料口，所述排料口连接有干污泥仓16。A discharge port is provided at the bottom of the drying equipment 7, and a dry sludge bin 16 is connected to the discharge port.
所述干化设备7的顶部设置有热风出口9；所述热风出口9连接有旋风分离装置15的入口；所述旋风分离装置15的干污泥出口连接干污泥仓16；所述旋风分离装置15的热风出口依次连接二级分离装置18、冷凝设备19和锅炉炉膛5。The top of the drying equipment 7 is provided with a hot air outlet 9; the hot air outlet 9 is connected to the inlet of the cyclone separation device 15; the dry sludge outlet of the cyclone separation device 15 is connected to the dry sludge bin 16; the cyclone separation The hot air outlet of the device 15 is connected to the secondary separation device 18, the condensing device 19 and the boiler furnace 5 in sequence.
所述湿污泥储仓10、干污泥仓16和污泥输送系统11均连接有除臭风机21。The wet sludge storage bin 10, the dry sludge bin 16 and the sludge conveying system 11 are all connected with a deodorizing fan 21.
本发明的工作流程：The workflow of the present invention:
从燃煤电站锅炉1尾部烟道空预器3出口抽取一部分热空气作为干化系统动力源，其余热风继续以一、二次风等形式送入锅炉炉膛5内；A part of the hot air is drawn from the outlet of the air preheater 3 in the tail flue of the coal-fired power station boiler 1 as the power source of the drying system, and the remaining hot air continues to be sent into the boiler furnace 5 in the form of primary and secondary air;
抽取的热风作为干化系统的流化热风经过布风装置8均匀进入干化设备7，最终从顶部排出，同时，湿污泥由湿污泥储仓10经过输送系统11和初级破碎设备12进入干化设备7；The extracted hot air enters the drying equipment 7 evenly through the air distribution device 8 as the fluidized hot air of the drying system, and is finally discharged from the top. At the same time, the wet sludge enters from the wet sludge storage bin 10 through the conveying system 11 and the primary crushing equipment 12 Drying equipment 7;
干化设备7内部铺设有蒸汽管道13，热蒸汽有电站汽水系统提供，换热后返回至电站汽水系统14，干化设备7底部有排料口，可将干化后的大块污泥排至干污泥仓16；A steam pipe 13 is laid inside the drying equipment 7, and the hot steam is provided by the power station soda system. After heat exchange, it returns to the power station soda system 14. There is a discharge port at the bottom of the drying equipment 7, which can discharge the dried sludge. To dry sludge bin 16;
顶部出口热风9含大量细颗粒干污泥，经过旋风分离装置15分离出绝大部分干污泥至干污泥仓16，剩余热风经过二级分离装置和冷凝设备后送入锅炉继续燃烧；The top outlet hot air 9 contains a large amount of fine-particle dry sludge, and the cyclone separation device 15 separates most of the dry sludge to the dry sludge bin 16, and the remaining hot air is sent to the boiler to continue combustion after passing through the secondary separation device and condensing equipment;
为防止污泥臭气散播，湿污泥仓、干污泥仓、污泥输送管道需用除臭风机21抽气，所抽臭气最终送入锅炉中燃烧。In order to prevent sludge odor from spreading, the wet sludge bin, dry sludge bin, and sludge conveying pipeline need to be exhausted by the deodorizing fan 21, and the exhausted odor is finally sent to the boiler for combustion.
进一步，锅炉尾部烟道空预器3的出口热风温度以锅炉运行状态为主，设计时只取锅炉设计工况，抽取风量为干化装置设计值，约5000～20000Nm3/h(以干化机处理规模为准)，不会对锅炉运行产生较大影响；Furthermore, the outlet hot air temperature of the air preheater 3 in the tail flue of the boiler is mainly based on the operating state of the boiler. During the design, only the design working conditions of the boiler are taken, and the extracted air volume is the design value of the drying device. The treatment scale shall prevail), which will not have a major impact on the operation of the boiler;
流化热风风压力受限于锅炉风机，可能无法满足干化装置需求，因此可能需配置单独的增 压风机，本专利不进行特定约束，但相关改进描述均应在本专利保护范围。The fluidized hot air pressure is limited by the boiler fan and may not be able to meet the requirements of the drying device. Therefore, a separate booster fan may be required. This patent does not impose specific restrictions, but the description of related improvements should fall within the protection scope of this patent.
图中只标示一、二次热风，但实际可能存在三次风或者OFA风等，本专利不进行特定约束，但相关改进描述均应在本专利保护范围。Only the primary and secondary hot air are shown in the figure, but there may actually be tertiary air or OFA air, etc. This patent does not impose specific restrictions, but the description of related improvements should fall within the scope of protection of this patent.
布风装置主要作用为均匀布风，同时增加布风阻力以防止干化装置中的泥料倒漏入送风系统中；The main function of the air distribution device is to distribute the air evenly, while increasing the air distribution resistance to prevent the mud in the drying device from leaking into the air supply system;
湿污泥储仓(如液压滑架、液压盖板)及输送系统(如柱塞泵、蛟龙输送器)为成熟技术，本专利不进行特定约束；Wet sludge storage bins (such as hydraulic slides, hydraulic cover plates) and transportation systems (such as plunger pumps, Jiaolong conveyors) are mature technologies, and this patent does not impose specific restrictions;
初级破碎装置可使用湿污泥切条机或其他类似设备，本专利不进行特定约束，但相关改进描述均应在本专利保护范围。The primary crushing device can use a wet sludge cutter or other similar equipment. This patent does not impose specific restrictions, but the description of related improvements should be within the scope of protection of this patent.
干化设备内蒸汽管道为螺旋盘管或“S”型管束，具体设计以干化设备换热计算为准，但相关改进描述均应在本专利保护范围；The steam pipeline in the drying equipment is a spiral coil or "S" tube bundle. The specific design is subject to the heat exchange calculation of the drying equipment, but the description of related improvements should be within the protection scope of this patent;
干化设备底部排料口结构与流化床锅炉相近，排料口后部应安装有送料装置(类似刮板给料机、螺旋给料机等)，本专利不进行特定约束，但相关改进描述均应在本专利保护范围。The structure of the discharge port at the bottom of the drying equipment is similar to that of a fluidized bed boiler. A feeding device (similar to a scraper feeder, screw feeder, etc.) should be installed behind the discharge port. This patent does not impose specific restrictions, but related improvements The description should be in the scope of protection of this patent.
出口热风经过旋风分离装置分离后，若距离锅炉较近，且无冬季极寒天气，可选择不经过二级分离装置和冷凝设备，直接送至锅炉，本专利不进行特定约束，但相关改进描述均应在本专利保护范围；After the outlet hot air is separated by the cyclone separation device, if it is close to the boiler and there is no extreme cold weather in winter, it can be directly sent to the boiler without passing through the secondary separation device and condensing equipment. This patent does not impose specific restrictions, but related improvements are described All should be within the scope of protection of this patent;
二级分离装置可选用布袋除尘设备也可选用管式除尘设备，具体以现场条件为准，本专利不进行特定约束。The two-stage separation device can choose the bag dust removal equipment or the tube type dust removal equipment. The specific conditions are subject to the site conditions. This patent does not impose specific restrictions.
冷凝设备为成熟换热设备，冷凝出的废水若符合当地纳管标准，可直接排入电站污水系统，否则需经过废水处理装置方可排入电站污水系统。The condensing equipment is a mature heat exchange equipment. If the condensed waste water meets the local pipe standards, it can be directly discharged into the sewage system of the power station, otherwise it can be discharged into the sewage system of the power station through a wastewater treatment device.

Claims (9)

  1. 一种基于燃煤电站热风循环的污泥协同处置一体化系统，其特征在于，包括锅炉尾部烟道空预器(3)和干化设备(7)，其中，所述锅炉尾部烟道空预器(3)上设置有空气入口和烟气入口，所述烟气入口连接燃煤电站锅炉(1)尾部烟道上一级换热设备的烟气出口；所述锅炉尾部烟道空预器(3)的空气出口分别连接燃煤电站锅炉的锅炉炉膛的入口、以及干化设备的流化热风入口；所述干化设备(7)上设置有湿污泥入口、蒸汽入口和干污泥出口。An integrated system for sludge co-processing based on hot air circulation in coal-fired power stations, which is characterized by comprising an air preheater (3) and drying equipment (7) for the tail flue of the boiler, wherein the air preheater of the tail flue of the boiler The device (3) is provided with an air inlet and a flue gas inlet, and the flue gas inlet is connected to the flue gas outlet of the upper-level heat exchange equipment in the tail flue of the coal-fired power station boiler (1); the boiler tail flue air pre-heater ( 3) The air outlet is respectively connected to the inlet of the boiler furnace of the coal-fired power station boiler and the fluidized hot air inlet of the drying equipment; the drying equipment (7) is provided with a wet sludge inlet, a steam inlet and a dry sludge outlet .
  2. 根据权利要求1所述的一种基于燃煤电站热风循环的污泥协同处置一体化系统，其特征在于，所述锅炉尾部烟道空预器(3)上的热风入口连接锅炉风机(2)的热风出口。The integrated system of sludge co-processing based on hot air circulation of coal-fired power plants according to claim 1, characterized in that the hot air inlet on the air preheater (3) of the tail flue of the boiler is connected to the boiler fan (2) The hot air outlet.
  3. 根据权利要求1所述的一种基于燃煤电站热风循环的污泥协同处置一体化系统，其特征在于，所述干化设备(7)的湿污泥入口连接有湿污泥储仓(10)；所述湿污泥储仓(10)和干化设备上的湿污泥入口之间依次设置有输送系统(11)和初级破碎设备(12)。The integrated system of sludge co-processing based on hot air circulation of coal-fired power plants according to claim 1, characterized in that the wet sludge inlet of the drying equipment (7) is connected with a wet sludge storage bin (10). ); The wet sludge storage bin (10) and the wet sludge inlet on the drying device are sequentially provided with a conveying system (11) and a primary crushing device (12).
  4. 根据权利要求1所述的一种基于燃煤电站热风循环的污泥协同处置一体化系统，其特征在于，所述干化设备(7)的干污泥出口连接有干污泥仓(16)。The integrated system of sludge co-processing based on hot air circulation of coal-fired power plants according to claim 1, characterized in that the dry sludge outlet of the drying equipment (7) is connected with a dry sludge bin (16) .
  5. 根据权利要求1所述的一种基于燃煤电站热风循环的污泥协同处置一体化系统，其特征在于，所述干化设备(7)的蒸汽入口连接有蒸汽管道(13)，所述蒸汽管道(13)布置在干化设备(7)的内腔中；所述蒸汽管道(13)的蒸汽口连接电站汽水系统(14)。The integrated system of sludge co-processing based on hot air circulation of coal-fired power plants according to claim 1, characterized in that the steam inlet of the drying equipment (7) is connected with a steam pipe (13), and the steam The pipe (13) is arranged in the inner cavity of the drying equipment (7); the steam port of the steam pipe (13) is connected to the steam water system (14) of the power station.
  6. 根据权利要求1所述的一种基于燃煤电站热风循环的污泥协同处置一体化系统，其特征在于，所述干化设备(7)上还设置有热风出口(9)，所述热风出口(9)连接有旋风分离装置(15)；所述旋风分离装置(15)的干污泥出口连接干污泥仓(16)；所述旋风分离装置(15)的热风出口依次连接二级分离装置(18)、冷凝设备(19)和锅炉炉膛(5)。The integrated system for co-processing sludge based on hot air circulation of coal-fired power plants according to claim 1, wherein the drying equipment (7) is also provided with a hot air outlet (9), and the hot air outlet (9) The cyclone separation device (15) is connected; the dry sludge outlet of the cyclone separation device (15) is connected to the dry sludge bin (16); the hot air outlet of the cyclone separation device (15) is connected to the secondary separation in turn Device (18), condensing equipment (19) and boiler furnace (5).
  7. 根据权利要求1所述的一种基于燃煤电站热风循环的污泥协同处置一体化系统，其特征在于，所述干化设备(7)的流化热风入口处设置有布风装置(8)。The integrated system for sludge co-processing based on hot air circulation of coal-fired power plants according to claim 1, characterized in that an air distribution device (8) is provided at the fluidized hot air inlet of the drying equipment (7) .
  8. 一种基于燃煤电站热风循环的污泥协同处置方法，其特征在于，基于权利要求1-7中 任一项所述的一种基于燃煤电站热风循环的污泥协同处置一体化系统，包括以下步骤：A method for co-processing sludge based on hot air circulation in a coal-fired power station, characterized in that, based on any one of claims 1-7, an integrated system for co-processing sludge based on hot air circulation in a coal-fired power station, comprising The following steps:
    从燃煤电站锅炉(1)尾部烟道空预器(3)出口抽取一部分热空气作为干化系统动力源，同时作为干化系统的辅助热源进入干化设备(7)，其余热风送入锅炉炉膛(5)内；A part of the hot air is drawn from the outlet of the air preheater (3) in the tail flue of the coal-fired power station boiler (1) as the power source of the drying system, and at the same time as the auxiliary heat source of the drying system enters the drying equipment (7), and the remaining hot air is sent to the boiler Inside the furnace (5);
    通过干化设备(7)内部的蒸汽以及流化热风对进入干化设备(7)内的湿污泥进行干化。The wet sludge entering the drying device (7) is dried by steam inside the drying device (7) and fluidized hot air.
  9. 根据权利要求8所述的一种基于燃煤电站热风循环的污泥协同处置方法，其特征在于，所述干化设备(7)排出的热风含大量细颗粒干污泥，经过旋风分离装置(15)分离出绝大部分干污泥至干污泥仓(16)，剩余热风依次经过用于除去细微颗粒二级分离装置和用于除去废水冷凝设备后送入锅炉炉膛(5)继续燃烧。The method for co-processing sludge based on hot air circulation in coal-fired power plants according to claim 8, characterized in that the hot air discharged from the drying equipment (7) contains a large amount of fine-particle dry sludge and passes through a cyclone separation device ( 15) Separate most of the dry sludge to the dry sludge bin (16), and the remaining hot air is sent to the boiler furnace (5) to continue burning after passing through the secondary separation device for removing fine particles and the equipment for removing condensing water.
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