CN110068013B - Sludge deep-dewatering drying incineration power generation system - Google Patents

Sludge deep-dewatering drying incineration power generation system Download PDF

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Publication number
CN110068013B
CN110068013B CN201910454638.5A CN201910454638A CN110068013B CN 110068013 B CN110068013 B CN 110068013B CN 201910454638 A CN201910454638 A CN 201910454638A CN 110068013 B CN110068013 B CN 110068013B
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sludge
steam
outlet
incinerator
air
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CN110068013A (en
Inventor
管志云
何志锋
邵敏
刘玉坤
李才
郭鹏辉
樊锐
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Shanghai Institute for Design and Research on Environmental Engineering Co Ltd
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Shanghai Institute for Design and Research on Environmental Engineering Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
    • 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
    • F23G5/033—Incineration of waste; Incinerator constructions; Details, accessories or control therefor with pretreatment comminuting or crushing
    • 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
    • F23G5/44—Details; Accessories
    • 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
    • F23G5/44—Details; Accessories
    • F23G5/442—Waste feed arrangements
    • F23G5/444—Waste feed arrangements for solid waste
    • 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
    • F23G5/44—Details; Accessories
    • F23G5/46—Recuperation of heat
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • 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
    • Y02E20/12—Heat utilisation in combustion or incineration of waste

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Water Supply & Treatment (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention relates to a sludge deep dehydration drying incineration power generation system, which comprises a membrane filter press, wherein the membrane filter press is suitable for deep dehydration of sludge; the steam disc dryer is suitable for drying the sludge; the spiral conveyor is suitable for conveying the dried sludge; the incinerator is suitable for drying and incinerating the sludge; the waste heat boiler is suitable for absorbing heat of high-temperature waste gas in the incinerator; the discharge port of the membrane filter press is connected with the feed port of the steam disc dryer, the discharge port of the steam disc dryer is connected with the feed port of the screw conveyor, the outlet of the screw conveyor is connected with the feed port of the incinerator, and the exhaust port of the incinerator is connected with the flue gas inlet of the waste heat boiler. The sludge deep-dewatering drying incineration power generation system is simple in structure, low in failure rate and high in heat energy utilization rate, can reduce the cost of sludge drying incineration, and simultaneously realizes recycling of sludge on the basis of reduction.

Description

Sludge deep-dewatering drying incineration power generation system
Technical Field
The invention relates to the field of environmental protection, in particular to a sludge deep-dewatering, drying and incinerating power generation system.
Background
Sludge can be produced in the sewage treatment process of a sewage treatment plant, the sludge needs to be incinerated after being dehydrated by a dehydration device, and the sludge is discharged after meeting the harmless requirement of reduction, but the cost of maintaining spontaneous combustion of the incinerated sludge after deep dehydration is high, and meanwhile, the heat energy produced in the sludge incineration process is basically wasted, the heat loss is large, and the economic benefit is low.
The composition of the urban sludge is related to the sources of sewage, the treatment process, the living level of urban residents and the like, the average value of the dry basis heat value of the sludge in China is about 11MJ/kg, and compared with developed countries such as Europe and the like, the dry basis heat value of the sludge in China is reduced by 22.4% -37.7%. Meanwhile, the domestic sludge has higher water content, the water content after dehydration and concentration is still higher, the water content in China is basically about 80%, the domestic sludge can only be blended and burned by the higher water content and the lower sludge heat value, and the domestic sludge and a cement kiln are cooperatively treated, but the blending and burning amount is limited.
The existing sludge incineration treatment process rarely adopts measures such as intermediate reheating and the like, has low power generation efficiency and low economic benefit, and needs a large amount of government subsidy to maintain the operation of a household garbage incineration plant.
Disclosure of Invention
The invention aims to solve the technical problems that: overcomes the defects of the prior art, provides a sludge deep-dewatering drying incineration power generation system, and solves the problem of insufficient sludge reduction treatment capacity in the current stage.
The technical scheme adopted for solving the technical problems is as follows: the sludge deep dehydration, drying and incineration power generation system comprises a membrane filter press, and is suitable for deep dehydration of sludge;
the steam disc dryer is suitable for drying the sludge;
the spiral conveyor is suitable for conveying the dried sludge;
the incinerator is suitable for drying and incinerating the sludge;
the waste heat boiler is suitable for absorbing heat of high-temperature waste gas in the incinerator;
the discharge port of the membrane filter press is connected with the feed port of the steam disc dryer, the discharge port of the steam disc dryer is connected with the feed port of the screw conveyor, the outlet of the screw conveyor is connected with the feed port of the incinerator, and the exhaust port of the incinerator is connected with the flue gas inlet of the waste heat boiler.
Further, a steam outlet of the waste heat boiler is connected with a steam power generation system;
the steam power generation system comprises a high-pressure turbine, a reheater, a gas turbine, a condenser, a low-pressure preheater, a high-pressure preheater and a deaerator;
the steam outlet of the waste heat boiler is connected with the air inlet of the high-pressure steam turbine, the air outlet of the high-pressure steam turbine is connected with the reheater, the air outlet of the reheater is connected with the low-pressure steam turbine, the air outlet of the low-pressure steam turbine is connected with the condenser, the water outlet of the condenser is connected with the low-pressure preheater, the low-pressure preheater is connected with the high-pressure preheater, the high-pressure preheater is connected with the deaerator, and the deaerator is connected with the water inlet of the waste heat boiler through the water feeding pump.
Further, the steam outlet of the low pressure turbine is connected with the steam disc dryer through a branch pipeline and is suitable for providing steam for the steam disc dryer.
Further, the system also comprises a flue gas treatment system, wherein the flue gas treatment system comprises an SNCR system, a semi-dry reactor, an activated carbon injector, a bag-type dust remover and an SCR system;
the SNCR system is arranged between the incinerator smoke outlet and the exhaust-heat boiler smoke inlet;
the flue gas outlet of the waste heat boiler is connected with a semi-dry reactor, the semi-dry reactor is connected with a bag-type dust remover, the bag-type dust remover is connected with an SCR system, and the SCR system is connected with a chimney;
the activated carbon sprayer is arranged on a flue gas pipeline between the cloth bag dust remover and the semi-dry reactor.
Further, the exhaust-heat boiler flue gas outlet is connected with the air preheater flue gas inlet, and the air preheater flue gas outlet is connected with the semi-dry reactor;
the heat exchange air inlet of the air preheater is connected with the primary air blower, and the heat exchange air outlet of the air preheater is connected with the air inlet of the incinerator;
the incinerator is provided with an ignition device, and a combustion-supporting air port of the ignition device is connected with a heat exchange air outlet of the air preheater.
Further, the device also comprises a sludge temporary storage chamber, wherein a discharge port of the sludge temporary storage chamber is connected with a feed port of the membrane filter press;
an air outlet of the sludge temporary storage bin is connected with a secondary air blower, and the secondary air blower is connected with an air inlet of the incinerator.
Further, the coal screening machine further comprises a crushing and screening machine, wherein the crushing and screening machine is suitable for screening dry coal, and a discharge hole of the crushing and screening machine is connected with a feed inlet of the screw conveyor.
The beneficial effects of the invention are as follows:
the sludge deep-dewatering drying incineration power generation system is simple in structure, low in failure rate and high in heat energy utilization rate, can reduce the cost of sludge drying incineration, and simultaneously realizes recycling of sludge on the basis of reduction.
The system adopts the combination of deep sludge removal and drying, so that the water content of the sludge entering the incinerator can be reduced, the fuel consumption is reduced, the disposal cost of the sludge is reduced, and meanwhile, the drying machine can adjust the water content of a sludge outlet according to own design requirements;
waste heat utilization and power generation are carried out on the flue gas heat generated by sludge incineration, so that the resource and energy of the sludge are realized on the basis of sludge reduction, and the economic benefit of the sludge is improved;
the high-low pressure turbine unit can realize the maximum utilization of the steam heat, and the overall power generation efficiency of sludge power generation is improved;
the deep dehydration, drying and incineration power generation system has high heat utilization rate, the annual operation hour is more than 8000 hours, and the outlet flue gas meets the emission requirement;
the heat efficiency of the drier is 90-95%, so that the heat efficiency of the whole plant is obviously improved.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic block diagram of a sludge deep-dewatering, drying and incinerating power generation system;
fig. 2 is a schematic diagram of a steam power generation system.
Detailed Description
The invention will now be further described with reference to specific examples. These drawings are simplified schematic views illustrating the basic structure of the present invention by way of illustration only, and thus show only the constitution related to the present invention.
As shown in FIG. 1, the sludge deep dehydration, drying and incineration power generation system comprises a membrane filter press, and is suitable for deep dehydration of sludge; the steam disc dryer is suitable for drying the sludge; the spiral conveyor is suitable for conveying the dried sludge; the incinerator is suitable for drying and incinerating the sludge; the waste heat boiler is suitable for absorbing heat of high-temperature waste gas in the incinerator.
The discharge port of the membrane filter press is connected with the feed port of the steam disc dryer, the discharge port of the steam disc dryer is connected with the feed port of the screw conveyor, the outlet of the screw conveyor is connected with the feed port of the incinerator, and the exhaust port of the incinerator is connected with the flue gas inlet of the waste heat boiler.
The incinerator adopts a bubbling incinerator, the combustion temperature is 850-950 ℃, the retention time of the temperature of flue gas generated by incineration is more than 850 ℃ and is more than 2 seconds, primary air of the incinerator is extracted from the atmosphere, and secondary air is exhaust gas of the drier.
The waste heat boiler is an existing mature product and comprises a flue gas inlet, a flue gas outlet, a steam outlet and a water inlet; the method mainly recycles the heat of the flue gas of the incinerator, utilizes the heat of the flue gas to generate high-temperature saturated steam, and depends on the steam to do work.
Specifically, as shown in fig. 2, a steam outlet of the waste heat boiler is connected with a steam power generation system; the steam power generation system comprises a high-pressure turbine, a reheater, a gas turbine, a condenser, a low-pressure preheater, a high-pressure preheater and a deaerator; the steam outlet of the waste heat boiler is connected with the air inlet of the high-pressure steam turbine, the air outlet of the high-pressure steam turbine is connected with the reheater, the air outlet of the reheater is connected with the low-pressure steam turbine, the air outlet of the low-pressure steam turbine is connected with the condenser, the water outlet of the condenser is connected with the low-pressure preheater, the low-pressure preheater is connected with the high-pressure preheater, the high-pressure preheater is connected with the deaerator, and the deaerator is connected with the water inlet of the waste heat boiler through the water feeding pump.
The working flow of the steam power generation system is as follows: the saturated water firstly enters a steam pipeline in a waste heat boiler to exchange heat with high-temperature flue gas in an incinerator to become saturated steam, then enters a superheater in the waste heat boiler to become superheated steam with the temperature of 4MPa and 400 ℃, then enters a high-pressure turbine set to generate electricity, then enters a reheater to raise the temperature, the heated steam enters a low-pressure turbine set to generate electricity, then is discharged into a condenser to be condensed, meanwhile, part of steam is extracted in the low-pressure turbine to enter a steam disc dryer to dry sludge, the condensed water and low-temperature steam in the steam disc dryer enter the condenser to be mixed with valve gas of the low-pressure turbine, then enter the low-pressure heater and the high-pressure heater, and enter the waste heat boiler once through a deaerator and a water supply pump;
the system adopts a high-pressure turbine and a low-pressure turbine, and the valve gas at the outlet of the high-pressure turbine is reheated and heated and then enters the low-pressure turbine for power generation and reutilization, so that the utilization rate of water vapor can be improved, and the power generation efficiency is improved;
the reheater utilizes the steam in the steam drum to exchange heat with the steam at the outlet of the high-pressure steam turbine, so that the temperature of the steam is increased, the steam enters the low-pressure steam turbine to further generate electricity, the reheater has various heat exchange modes, namely convection type, radiation type and semi-radiation type, various structures can be adopted, and the convection type reheater has countercurrent flow, concurrent flow and mixed flow, single pipe rings, double pipe rings and multiple pipe rings, and the convection type reheater is vertical, horizontal, parallel to the front wall and vertical to the front wall. The convection type reheater is a reheater that mainly absorbs convection heat; the radiation type reheater refers to a reheater for absorbing hearth radiation; a half-radiant reheater (i.e., a screen superheater) refers to a reheater that absorbs relatively much of the furnace radiation (the radiation absorbs more than 1/2 of the total heat).
The low-pressure and high-pressure preheaters extract superheated steam in the operation of the low-pressure and high-pressure steam turbines to heat, so that the temperature of condensed water can be increased to more than 100 ℃, and then the primarily heated condensed water is pumped into the waste heat boiler under the action of the water supply pump.
The steam outlet of the low pressure turbine is connected with the steam disc dryer through a branch pipeline and is suitable for providing steam for the steam disc dryer. Therefore, the steam heat can be fully utilized to dry the sludge, the sludge is effectively recycled, and the cost of sludge disposal is reduced.
Specifically, the sludge deep-removal drying incineration power generation system also comprises a flue gas treatment system, wherein the flue gas treatment system comprises an SNCR system, a semi-dry reactor, an activated carbon injector, a bag-type dust remover and an SCR system; the SNCR system is arranged between the incinerator smoke outlet and the exhaust-heat boiler smoke inlet; the flue gas outlet of the waste heat boiler is connected with a semi-dry reactor, the semi-dry reactor is connected with a bag-type dust remover, the bag-type dust remover is connected with an SCR system, and the SCR system is connected with a chimney; the activated carbon sprayer is arranged on a flue gas pipeline between the cloth bag dust remover and the semi-dry reactor.
The flue gas treatment system works in principle: the method comprises the steps of firstly reducing the content of nitrogen oxides in flue gas by an SNCR system, then heating saturated water of a water supply pump to superheated steam through a waste heat boiler, heating combustion-supporting air once in an air preheater, then entering a semi-dry reactor, injecting slaked lime in the semi-dry reactor to reduce sulfides in the flue gas, injecting active carbon in a pipeline before entering a bag-type dust collector to remove dioxin in the flue gas, removing particles in the flue gas in the bag-type dust collector, then entering an SCR system to inject ammonia water for further denitration, and finally entering a chimney.
Specifically, in order to fully utilize the heat of the flue gas, the flue gas outlet of the waste heat boiler is connected with the flue gas inlet of the air preheater, and the flue gas outlet of the air preheater is connected with the semi-dry reactor;
the heat exchange air inlet of the air preheater is connected with the primary air blower, and the heat exchange air outlet of the air preheater is connected with the air inlet of the incinerator; the incinerator is provided with an ignition device, and a combustion-supporting air port of the ignition device is connected with a heat exchange air outlet of the air preheater.
Specifically, before the sludge enters the membrane filter press, the sludge is prevented from being in a temporary sludge storage, and a discharge port of the temporary sludge storage is connected with a feed port of the membrane filter press; an air outlet of the sludge temporary storage bin is connected with a secondary air blower, and the secondary air blower is connected with an air inlet of the incinerator. The secondary air blower draws the temporary sludge storage, and performs primary dehumidification on the sludge.
And the crushing and screening machine is suitable for screening the dry coal, and a discharge hole of the crushing and screening machine is connected with a feed inlet of the screw conveyor. When the sludge enters the screw conveyor, the sludge enters the screw conveyor together with the screened dry coal, the dry coal and the sludge are fully and uniformly stirred, and then the sludge enters the incinerator for incineration, so that the sludge can be fully combusted.
The process of the patent dry coal comprises the following steps: the coal blocks are firstly stored in a dry coal warehouse, the storage capacity of the dry coal warehouse is 30 days, then the coal blocks enter a crusher through a belt conveyor to be crushed, crushed coal dust and sludge are mixed in a mixer, and then the crushed coal dust and sludge are conveyed to an incinerator together.
The invention relates to a working principle of a sludge deep-removal drying incineration power generation system, which comprises the following steps: the sludge is conveyed into a membrane filter press through a screw rod, partial medicament is added into the membrane filter press according to the actual requirement of the sludge to reduce the water content of the sludge from 80% to 60%, the deeply removed sludge enters a steam disc dryer through a scraper conveyor, the steam disc dryer extracts partial steam from a low-pressure turbine set as a heat source to dry the sludge, the water content of the sludge is reduced to 40% from the original 60%, the dried sludge enters a middle temporary storage bin, the mixed sludge is mixed according to the proportion of the sludge and coal dust, the mixed sludge enters a fluidized bed incinerator through a bucket elevator to be incinerated, the incinerated slag enters a slag cooler to be cooled, and the slag enters a slag warehouse to be subjected to subsequent treatment, so that the sludge can be used as an additive of building materials or foundations or is buried.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.

Claims (2)

1. The sludge deep-dewatering drying incineration power generation system is characterized by comprising
The membrane filter press is suitable for deep dehydration of sludge;
the steam disc dryer is suitable for drying the sludge;
the spiral conveyor is suitable for conveying the dried sludge;
the incinerator is suitable for drying and incinerating the sludge;
the waste heat boiler is suitable for absorbing heat of high-temperature waste gas in the incinerator;
the discharge port of the membrane filter press is connected with the feed port of the steam disc dryer, the discharge port of the steam disc dryer is connected with the feed port of the screw conveyor, the feed port of the incinerator at the outlet of the screw conveyor is connected, and the smoke outlet of the incinerator is connected with the smoke inlet of the waste heat boiler;
the steam outlet of the waste heat boiler is connected with a steam power generation system;
the steam power generation system comprises a high-pressure turbine, a reheater, a gas turbine, a condenser, a low-pressure preheater, a high-pressure preheater and a deaerator;
the steam outlet of the waste heat boiler is connected with the air inlet of the high pressure turbine, the air outlet of the high pressure turbine is connected with the reheater, the air outlet of the reheater is connected with the low pressure turbine, the air outlet of the low pressure turbine is connected with the condenser, the water outlet of the condenser is connected with the low pressure preheater, the low pressure preheater is connected with the high pressure preheater, the high pressure preheater is connected with the deaerator, and the deaerator is connected with the water inlet of the waste heat boiler through the water feeding pump;
the steam outlet of the low-pressure steam turbine is connected with the steam disc dryer through a branch pipeline and is suitable for providing steam for the steam disc dryer;
the system also comprises a flue gas treatment system, wherein the flue gas treatment system comprises an SNCR system, a semi-dry reactor, an activated carbon injector, a bag-type dust remover and an SCR system;
the SNCR system is arranged between the incinerator smoke outlet and the exhaust-heat boiler smoke inlet;
the flue gas outlet of the waste heat boiler is connected with a semi-dry reactor, the semi-dry reactor is connected with a bag-type dust remover, the bag-type dust remover is connected with an SCR system, and the SCR system is connected with a chimney;
the active carbon sprayer is arranged on a flue gas pipeline between the cloth bag dust remover and the semi-dry reactor;
the exhaust-heat boiler flue gas outlet is connected with the air preheater flue gas inlet, and the air preheater flue gas outlet is connected with the semi-dry reactor;
the heat exchange air inlet of the air preheater is connected with the primary air blower, and the heat exchange air outlet of the air preheater is connected with the air inlet of the incinerator;
an ignition device is arranged on the incinerator, and a combustion-supporting air port of the ignition device is connected with a heat exchange air outlet of the air preheater;
the device also comprises a sludge temporary storage tank, wherein a discharge port of the sludge temporary storage tank is connected with a feed port of the membrane filter press;
an air outlet of the sludge temporary storage bin is connected with a secondary air blower, and the secondary air blower is connected with an air inlet of the incinerator.
2. The sludge deep-dewatering drying incineration power generation system according to claim 1, further comprising a crushing and screening machine, wherein the crushing and screening machine is suitable for screening dry coal, and a discharge port of the crushing and screening machine is connected with a feed port of the screw conveyor.
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CN110631020A (en) * 2019-08-15 2019-12-31 杭州国泰环保科技股份有限公司 Dry sludge dewatering incinerator system and dry sludge dewatering incineration method thereof
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