CN205279039U

CN205279039U - Mud and living beings co -combustion power generation system

Info

Publication number: CN205279039U
Application number: CN201521133327.2U
Authority: CN
Inventors: 杜玉吉; 李龙; 纪执琴
Original assignee: Changzhou Energy Saving Research Institute Co Ltd
Current assignee: Changzhou Energy Saving Research Institute Co Ltd
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2016-06-01
Anticipated expiration: 2025-12-30

Abstract

The utility model discloses a mud and living beings co -combustion power generation system, vulcanization bed boiler including be used for burning mud and living beings, the flue gas that vulcanizes the production of bed boiler gets into the mud memory area and carries out the mummification processing to mud, the flue gas of handling gets into the feedwater of economizer heating boiler, discharge through flue gas processing system again, the boiler combustion of vulcanization bed is sent into to mud and mixed the entering together of biomass fuel that the mummification was handled after rubbing crusher smashes, the burning produces vapor and drives steam turbine acting electricity generation, drawing gas of steam turbine gets into air heater, an air for preheating get into and vulcanize the bed boiler. The utility model discloses with directly mixing burning electricity generation among the biomass fuel behind the sludge drying, can adjust the furnace temperature through adjusting the mixing proportion, the low noxious material of production dioxin is crossed to the furnace temperature when preventing that mud from burning alone. Mud and the heat that biomass fuel co -combustion had utilized the mud burning to produce do not need additionally to add fossil fuel, the energy can be saved moreover.

Description

A kind of mud and biomass mixed firing power generation system

Technical field

The utility model relates to a kind of mixed power generation system.

Background technology

Mud is the by product with a large amount of pollutent that Sewage Plant produces in Treating Municipal Sewage and trade effluent, and in the sewage work built up, more than 90% does not have the auxiliary facility of sludge treatment. The processing mode of current mud is mainly: stable landfill, compost (Land_use change) and burning, and burns and can make the whole carbonization of organism, effectively kills pathogenic agent, reduces sludge volume to greatest extent. Mud due to water ratio relatively big, combustion heat value is low, cannot directly burn, generally need to through dehydration, drying and other treatment. Traditional sludge treatment burning process is that mud is after the anhydration systems such as sludge condensation machine, plate-and-frame filter press, low temperature mummification stove process, water ratio is reduced to about 15%, then enter the burning of mud fluidized bed incinerator, need the fuel combustion supportings such as supplementary heavy oil simultaneously. The lime-ash outward transport landfill produced, flue gas, after air preheater, enters cleaning treatment system, high altitude discharge after being up to state standards.

There are problems in traditional sludge incineration technology, wherein key problem is the highly toxic substances such as investment is big, processing costs height, organic combustion generation Dioxins. Owing to the water content of dewatered sludge, organic content, composition are unstable, it is necessary to add a certain amount of fossil oil, directly have influence on processing cost.

Practical novel content

The purpose of this utility model is to provide a kind of mud and biomass mixed firing power generation system, makes up himself calorific value of mud low, the defect that can not directly burn, effectively utilizes sludge resource.

The technical scheme that the utility model provides is:

A kind of mud and biomass mixed firing power generation system, comprise the Fluidized Bed Boiler for burn mud and biomass, the flue gas that Fluidized Bed Boiler produces enters mud storage zone and mud is carried out drying and other treatment, the flue gas processed enters the feedwater of economizer heating boiler, discharge through smoke processing system again, the mud of drying and other treatment and biomass fuel are mixed to enter after pulverizer is pulverized and send into Fluidized Bed Boiler burning, burning produces water vapour and drives steam turbine acting generating, drawing gas of steam turbine enters air preheater, the air entering Fluidized Bed Boiler for preheating.

Mixed power generation system of the present utility model will directly mix combustion power generation in biomass fuel after sludge drying, it is possible to by regulating mixing proportion, regulating stove bore temperature, fire box temperature too low generation toxic substance Dioxins when preventing mud from burning separately. Mud and biomass fuel mixed firing make use of the heat that sludge incineration produces, and do not need additionally to add fossil oil, save the energy; Simultaneously using boiler exhaust gas first as the mummification thermal source of mud, again to feedwater heating, make full use of fume afterheat, and utilize extracted steam from turbine preheated air, air themperature can be improved, prevent flue gas low-temperature from corroding, solve the biomass resources such as stalk and arbitrarily burn the wasting of resources and problem of environmental pollution that bring.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figure 1, a kind of mud and biomass mixed firing power generation system, comprise the Fluidized Bed Boiler for burn mud and biomass, the flue gas that Fluidized Bed Boiler produces enters mud storage zone and mud is carried out drying and other treatment, the flue gas processed enters the feedwater of economizer heating boiler, discharge through smoke processing system again, the mud of drying and other treatment and biomass fuel are mixed to enter after pulverizer is pulverized and send into Fluidized Bed Boiler burning, burning produces water vapour and drives steam turbine acting generating, drawing gas of steam turbine enters air preheater, the air entering Fluidized Bed Boiler for preheating.

Mud is first carried out drying and other treatment by the high-temperature flue gas discharged from fluidized-bed combustion boiler, then enters the feedwater of economizer heating boiler, discharges after smoke processing system. Mud through dehydration, drying and other treatment enters pulverizer co-grinding with biomass fuel together with stalk, wood chip, Pericarppium arachidis hypogaeae etc., then fluidized-bed combustion boiler burning is sent into, water vapour is produced with water heat exchange, water vapour enters steam turbine acting and drives generator generating, blending burning can improve the combustionproperty of mud, and promote the temperature of combustion of burner hearth, prevent from producing toxic substance Dioxins during sludge incineration. Wherein, the part of steam turbine is drawn gas and is entered air preheater, for heating the air entering fluidized-bed combustion boiler, to improve fire box temperature, and fuel saving. Using draws gas does not utilize the reason of fume afterheat to be to preheating of air, containing a large amount of deleterious acidic gas in the flue gas that sludge incineration produces, if funnel temperature is too low, causing acid attack, the heated medium of air preheater is air, more difficult monitor temperature, and economizer heated medium is water, flue gas exit temperature, close to water temperature, is easier to monitoring, therefore utilize fume afterheat heated feed water, utilize bled steam preheating air. The lime-ash that last burner hearth produces directly transports outward landfill.

Claims

1. a mud and biomass mixed firing power generation system, it is characterized in that, comprise the Fluidized Bed Boiler for burn mud and biomass, the flue gas that Fluidized Bed Boiler produces enters mud storage zone and mud is carried out drying and other treatment, the flue gas processed enters the feedwater of economizer heating boiler, discharge through smoke processing system again, the mud of drying and other treatment and biomass fuel are mixed to enter after pulverizer is pulverized and send into Fluidized Bed Boiler burning, burning produces water vapour and drives steam turbine acting generating, drawing gas of steam turbine enters air preheater, the air entering Fluidized Bed Boiler for preheating.