CN107143841A - The comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load - Google Patents
The comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load Download PDFInfo
- Publication number
- CN107143841A CN107143841A CN201710412458.1A CN201710412458A CN107143841A CN 107143841 A CN107143841 A CN 107143841A CN 201710412458 A CN201710412458 A CN 201710412458A CN 107143841 A CN107143841 A CN 107143841A
- Authority
- CN
- China
- Prior art keywords
- waste water
- desulfurization wastewater
- flue gas
- lower load
- zero
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- 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
- F22D1/36—Water and air preheating systems
-
- 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
- F23J15/006—Layout of treatment plant
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treating Waste Gases (AREA)
Abstract
The comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load, including concurrent heating subsystem and desulfurization wastewater evaporative subsystem, described concurrent heating subsystem include No. zero high-pressure heater, high steam pipeline and steam valve；Described desulfurization wastewater evaporative subsystem includes waste water baffle-box, waste water filtering reducing device, waste water preheater, water pump, atomizer and waste pipe, can lift boiler feedwater and exhaust gas temperature, provides more heat energy for waste water evaporation and shortens its evaporation time；Recoverable thermal flue gas realizes the zero-emission of desulfurization wastewater under running on the lower load, while can also lift unit denitration efficiency.
Description
Technical field
The present invention relates to the system that thermal flue gas evaporation desulfurization wastewater is recycled under a kind of coal-burning power plant's running on the lower load,
The system can realize the zero-emission of desulfurization wastewater under running on the lower load while improving unit capacity usage ratio, belong to thermal power generation section
Can emission reduction field.
Background technology
In order to reach country to coal-burning power plant SO2The requirement of minimum discharge, domestic power plant is mostly wet using limestone-gypsum
Method flue gas desulfurization technique, the technology generates serious discharge of wastewater while high-efficiency desulfurization.In April, 2015, State Council's hair
Cloth《Water pollution action plan》Enhance the dynamics of preventing and treating to all kinds of water pollutions, desulfurization wastewater due to complicated component (containing suspension,
Fluoride, heavy metal and salinity etc.), emission hazard receive highest attention in the industry greatly.At present, most power plant is heavy using chemistry
The technique (traditional three headers method) in shallow lake removes desulfurization wastewater pollutant, but this method operating cost is high, to solubilities such as villaumites
The removal of heavy metal ions rate such as salinity and selenium is limited, and its water outlet suspended particulate substance and COD etc. also tend to be unable to stably reaching standard discharge,
Easily cause secondary pollution.In order to realize the zero-emission of desulfurization wastewater, flue evaporation technique is suggested and gradually paid attention to, should
Desulfurization wastewater is atomized the flue to be sprayed into after drop between air preheater and electric cleaner by technology, utilizes boiler tail thermal flue gas
Waste water is evaporated, the fine solid particle thing of generation is caught by electric cleaner, its key is effectively to utilize boiler exhaust gas used heat will
Exhausted water drips evaporating completely in a short time.For the higher unit of exhaust gas temperature, boiler exhaust gas gives up under its rated load
Heat is typically all evaporated desulfurization wastewater drop in a short time enough.However, recent year fired power generating unit be generally chronically at it is low
Load operating region, the reduction of load often leads to the decline of exhaust gas temperature, when shortage of heat contained by flue gas is with set
When being evaporated desulfurization wastewater in the time, drop will attach to stack inner surface or enter electric cleaner, easily cause corrosion and scaling and
Electric cleaner failure, desulfurization wastewater flue evaporation technique will be unable to come into operation.The row for improving boiler tail under running on the lower load
Cigarette temperature becomes the key that the technology realizes desulfurization wastewater zero-emission.
The active reaction temperature of coal group of motors denitrating system catalyst is typically about 320-420 DEG C.In unit underload fortune
Under row state, the temperature of economizer exit flue gas can accordingly decline, when cigarette temperature is not enough to reach catalyst activity reaction temperature
Denitration device efficiency can be caused to be greatly reduced or even be forced out of service, unit will be unable to reach country to the ultralow row of nitrogen oxides
The requirement put.The problem of in order to solve running on the lower load denitration, " No. zero high-pressure heater " technology is suggested and gradually promoted should
With.The technology (is pressed to Water flow-path) after Steam Turbine Regenerative System is No. 1 high in addition and sets up primary heater (i.e. No. zero hyperbaric heating
Device), the heater draws steam heating from No. 1 high plus outlet boiler feedwater at system high-quality vapour source, is remarkably improved
Boiler feed temperature.The raising of feed temperature reduces the heat exchange amount of flue gas and feedwater in economizer, makes economizer exit cigarette
Temperature rises the active temperature for reaching denitrating catalyst, realizes the raising of denitration efficiency under running on the lower load.However, due to the skill
Art can also improve the cigarette temperature of air preheater outlet simultaneously, so result in the increase of boiler exhaust gas heat loss, rationally utilize the part
Used heat is to improving unit capacity usage ratio important in inhibiting.
In summary, under performing low-load running of machine set operating mode, " No. zero high-pressure heater " technology is ensuring denitration device effect
But boiler tail flue gas temperature is improved while rate, heat loss due to exhaust gas is increased；Although desulfurization wastewater flue evaporation technique can
To realize the zero-emission of waste water, but must be premised on sufficient boiler exhaust gas waste heat.Two kinds of technologies of joint can be utilized effectively
Thermal flue gas, realize desulfurization wastewater zero-emission and lift denitration efficiency, reach the purpose of power plant effluent and used heat comprehensive improvement.
The content of the invention
The system that the present invention provides a kind of combined desulfurization waste water evaporative subsystem and concurrent heating subsystem, can be low in coal-burning power plant
The zero-emission of desulfurization wastewater and the recycling of thermal flue gas are realized under load condition.Desulfurization wastewater evaporative subsystem is used for de-
Sulphur waste water is pre-processed (filtering decrement and preheating), and in flue of the atomized spray between air preheater and electric cleaner；In advance
Processing can reduce waste water and required heat energy is evaporated in flue；The final smoke exhaust heat that absorbed in flue of waste water is evaporated, and is produced
Particulate matter be captured into electric cleaner.Concurrent heating subsystem be used for improve boiler feedwater and exhaust gas temperature, can for waste water in cigarette
Evaporation provides more sufficient heat energy and shortens its evaporation time in road；In addition, can also improve the denitration under unit running on the lower load
Efficiency.
The technical solution adopted by the present invention is as described below.
The comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load, it is characterised in that including concurrent heating
Subsystem and desulfurization wastewater evaporative subsystem；Described concurrent heating subsystem include No. zero high-pressure heater, high steam pipeline with
Steam valve；Described desulfurization wastewater evaporative subsystem include waste water baffle-box, waste water filtering reducing device, waste water preheater,
Water pump, atomizer and waste pipe.
Further, No. zero high-pressure heater is connected by high steam pipeline with high-quality vapour source, No. zero hyperbaric heating
Device is connected with the heaters at different levels of heat regenerative system, is arranged in No. 1 between high-pressure heater and economizer.
Further, waste water baffle-box is connected with desulfurizing tower, waste water baffle-box, waste water filtering reducing device, waste water preheating
Device, water pump and atomizer are sequentially connected, and atomizer is arranged in the flue top between air preheater and electric cleaner, by desulfurization
Waste water atomized spray is in flue.
Further, high steam pipeline one end of concurrent heating subsystem is connected with steam turbine high-pressure cylinder perforate, the other end with
No. zero high-pressure heater is connected.
Further, turbine system is provided with filling regulating valve, high steam pipeline one end of concurrent heating subsystem and filling
Pipeline after regulating valve is communicated, and the other end is connected with No. zero high-pressure heater.
Further, concurrent heating subsystem includes No. zero high-pressure heater, jet type heat pump, the first high steam pipeline, the
Two high steam pipelines, the 3rd high steam pipeline, steam valve；First high steam pipeline one end and boiler platen superheater
Jet chimney is communicated, and the other end is connected with jet type heat pump driving steam inlet；Second high steam pipeline one end adds with No. 1 high
Extraction line is communicated, and the other end is connected with jet type heat pump suction steam inlet；3rd high steam pipeline one end and injecting type
Heat pump steam (vapor) outlet is connected, and the other end is connected with No. zero high-pressure heater.
Further, waste water filtering reducing device uses principle of reverse osmosis；Desulfurization wastewater be filtered into high-concentration waste water with
Clear water, wherein clear water carry out water resource recycling, and high-concentration waste water is evaporated.
Further, waste water filtering reducing device is made up of multiple standalone modules, is conducted batch-wise and is put into operation and clean, and is carried out whole
Body runs without interruption.
Further, waste water preheater is pipe heat exchanger, is installed in the flue between electric cleaner and desulfurizing tower；Change
It is low-temp desulfurization waste water in heat pipe, outer pipe is high-temperature flue gas；Or waste water preheater is pipe heat exchanger, outer pipe is low-temp desulfurization
It is high temperature heat medium water in waste water, pipe, waste water preheater is connected by heating agent waterpipe with fume waste heat recover；Fume waste heat is returned
Receipts device is pipe heat exchanger, is arranged in the flue between electric cleaner and desulfurizing tower, and it is low temperature heat medium water that it, which is managed interior, and pipe is outer to be
High-temperature flue gas.
Further, air compressor is connected between desulfurization wastewater water pump and atomizer there is provided the sky of certain pressure intensity
Gas, the atomizing effect of lifting waste water.
Compared with prior art, the present invention is taken off for the present situation of the long-term underrun of domestic coal unit using joint
The mode of sulphur waste water evaporative subsystem and concurrent heating subsystem, it is relatively low mainly to solve unit exhaust gas temperature under running on the lower load, takes off
Sulphur waste water can not realize the zero-emission of desulfurization wastewater in flue the problem of evaporating completely, improve electric cleaner operation
Security；Under unit rated load, concurrent heating subsystem can be closed, desulfurization wastewater evaporative subsystem can equally realize waste water zero
Discharge；Effective recycling unit thermal flue gas, improves capacity usage ratio；Improve the denitration under unit running on the lower load
Efficiency；Waste water drop, which is atomized, to be sprayed in the reunion in flue, being conducive to wherein tiny particles content, and cigarette is reduced to a certain extent
Dirt is discharged.
Brief description of the drawings
Fig. 1 is the structural representation of embodiments of the invention one；
Fig. 2 is the structural representation of embodiments of the invention two；
Fig. 3 is the structural representation of embodiments of the invention three；
Wherein：1- boilers, 2- economizers, 3- denitration devices, 4- air preheaters, 5- electric cleaners, 6- desulfurizing towers, 7- waste water mistakes
Reducing device is filtered, 8- waste water preheaters, 9- water pumps, 10- atomizers are No. 11-1 high to add, No. zero high-pressure heater of 12-, 13- vapour
Turbine high pressure cylinder, 14- desulfurization wastewater pipelines, 15- high steam pipelines, 16- steam valves, 17- filling regulating valves, 18- injections
Formula heat pump, 19- steam valves, 20- steam valves, 21- high steam pipelines, 22- high steam pipelines, 23- waste water baffle-boxs,
24- heating agent water-circulating pumps, 25- fume waste heat recovers, 26- waste water preheaters, 27- air compressors.
Embodiment
Below in conjunction with the accompanying drawings, technical scheme is described in detail.
Desulfurization wastewater zero-emission is realized under unit running on the lower load, its key is the exhaust gas temperature for improving boiler tail
With the heat for reducing waste water evaporation demand.The present invention improves the temperature of flue gas after air preheater by high-pressure heater concurrent heating subsystem
Degree, provides more sufficient heat energy, while shortening its evaporation time for waste water evaporation；Desulfurization wastewater first passes around filtering decrement and pre-
Heat etc. is pre-processed, and reduces it and required heat energy is evaporated in flue, spray and removed in air preheater and electricity thereafter by atomizer
In flue between dirt device, moisture absorption flue gas heat is evaporated, and the particulate matter of generation is captured into electric cleaner.
High-pressure heater concurrent heating subsystem includes the parts such as No. zero high-pressure heater, high steam pipeline and steam valve.
No. zero high-pressure heater is connected by high steam pipeline with high-quality vapour source, and high steam pipeline is provided with steam valve, high
Quality vapour source can be Boiler High Pressure jet chimney, steam turbine high-pressure cylinder and other high steam pipelines etc..No. zero high pressure adds
Hot device is connected with the heaters at different levels of heat regenerative system, is connected to by boiler feedwater pipeline No. 1 high plus economizer between, is fed water
Flow through successively it is No. 1 high plus, No. zero high-pressure heater and economizer.When performing low-load running of machine set, start concurrent heating subsystem.Come from
The steam of high-quality vapour source enters No. zero high-pressure heater through high steam pipeline, heats and is given from No. 1 high plus outlet boiler
Water, the boiler feedwater after heating is sent to economizer and boiler successively.Because boiler feed temperature is significantly improved, economizer
Middle flue gas and the heat exchange amount of feedwater are reduced, and the cigarette temperature of economizer exit is enhanced about 10-25 DEG C (with the many-side such as unit and load
Factor is relevant).Now, the cigarette temperature of air preheater outlet, which also gets a promotion, (can lift about 5-10 DEG C, if increasing taking out for high-quality steam
Vapour amount can be lifted higher), the evaporation for being desulfurization wastewater under underload in flue provides more sufficient heat energy, shortens simultaneously
Time needed for its evaporation.Further, since exhaust gas temperature is relatively low under running on the lower load, tend not to reach denitrating system
The active reaction temperature (about 320-420 DEG C) of catalyst, denitration device efficiency can be greatly reduced or even be forced out of service.This
Invention can improve about 10-25 DEG C of the temperature of economizer exit flue gas, reach denitration catalyst by the concurrent heating subsystem set up
The active reaction temperature of agent, can lift the denitration efficiency (can reach 80%-90%) under performing low-load running of machine set.
Desulfurization wastewater evaporative subsystem includes waste water baffle-box, waste water filtering reducing device, waste water preheater, water pump, mist
The position of change nozzle and waste pipe etc. part, the said equipment and waste water is both needed to make of acid corrosion-resistant material.Waste water delays
Rush case with desulfurizing tower to be connected, waste water filtering reducing device, waste water preheater, water pump and mist are sequentially passed through after desulfurization wastewater is buffered
Change nozzle to evaporate into flue.Waste water filtering reducing device uses principle of reverse osmosis, is made up of multiple standalone modules, can throw in batches
Fortune and cleaning, run without interruption；Desulfurization wastewater is filtered into high-concentration waste water and clear water, the wherein recyclable profit of clear water by the device
With high-concentration waste water (40%-70% for accounting for raw water amount) flows to waste water preheater.Waste water preheater effectively utilizes electric cleaner
The used heat of flue gas is preheated to desulfurization wastewater between desulfurizing tower, about 40-70 DEG C of wastewater temperature can be improved, while flue-gas temperature
About 1-2 DEG C of reduction.The desulfurization wastewater flowed out by waste water preheater leads to atomizer through water pump, and atomizer is installed on air preheater
Desulfurization wastewater, can be atomized (average grain diameter≤70 μm) and spray in flue by the flue top between electric cleaner.In flue
In, with flue gas mixing heat-exchange occurs for drop, fully absorbs wherein used heat, moisture is evaporated, and the solid particulate matter of generation is with cigarette
Gas is caught into electric cleaner by electrode, realizes the zero-emission of desulfurization wastewater.In this evaporation process, flue-gas temperature reduction about 3-
8 DEG C, because cigarette temperature is higher than acid dew point under running on the lower load, and No. zero high-pressure heater can lift 5-10 DEG C of cigarette temperature, so
Will not occur low-temperature corrosion influence unit safety operation.
Embodiment 1：
As shown in figure 1, concurrent heating subsystem includes No. zero high-pressure heater 12, high steam pipeline 15 and steam valve 16.
High steam pipeline 15 is provided with steam valve 16, and its one end is connected with the perforate of steam turbine high-pressure cylinder 13, the other end and No. zero high
Heater 12 is pressed to be connected.No. zero high-pressure heater 12 be installed on it is No. 1 high Jia 11 between economizer 2, boiler feedwater flows through 1 successively
It is number high Jia 11, No. zero high-pressure heater 12 and economizer 2.When performing low-load running of machine set, steam valve 16 is opened, steam turbine is high
The high steam of cylinder pressure 13 enters No. zero high-pressure heater 12 and heated from No. 1 high boiler feedwater Jia 11 and exported, and improves empty pre-
The temperature of the exiting flue gas of device 4, higher heat energy is provided for desulfurization wastewater evaporation.Also improve simultaneously and enter the flue gas of denitration device 3
Temperature, lifted denitration efficiency.
Desulfurization wastewater evaporative subsystem includes waste water baffle-box 23, waste water filtering reducing device 7, waste water preheater 8, water pump
9th, the position of atomizer 10 and desulfurization wastewater pipeline 14, aforementioned device and waste water is made using acid corrosion-resistant material.
The waste water exported by desulfurizing tower 6 sequentially passes through waste water baffle-box 23, waste water filtering reducing device 7, waste water preheater 8, water
Pump 9 and atomizer 10.The entrance of waste water baffle-box 23 is connected with the outlet of desulfurizing tower 6, enters useless after desulfurization wastewater is buffered
Water filtration reducing device 7.Waste water filtering reducing device 7 uses principle of reverse osmosis, is made up of multiple standalone modules, can put into operation in batches
With cleaning, run without interruption；Desulfurization wastewater is filtered into high-concentration waste water and clear water, wherein clear water recoverable by the device,
High-concentration waste water (40%-70% for accounting for raw water amount) flows to waste water preheater 8.Waste water preheater 8 is pipe heat exchanger, is installed
In flue between electric cleaner 5 and desulfurizing tower 6；It is low-temp desulfurization waste water in heat exchanger tube, outer pipe is high-temperature flue gas, waste water temperature
Degree gets a promotion through heat exchange.The waste water that waste water preheater 8 is exported delivers to atomizer 10 through water pump 9, and the nozzle is installed on empty pre-
Flue inner top between device 4 and electric cleaner 5, in order to increase heat-exchange time of the drop in flue, need to as far as possible be arranged in and lean on
The side of nearly air preheater 4；The desulfurization wastewater atomization of high concentration is the droplet cluster below 70 μm of average grain diameter and injection by the nozzle
In in flue；Drop absorbs fume waste heat evaporation in flue, and the solid particulate matter of generation is electric into electric cleaner 5 with flue gas
Pole is caught, and realizes the zero-emission of desulfurization wastewater.
Embodiment 2：
The present embodiment is directed to the system provided with filling regulating valve 17.As shown in Fig. 2 concurrent heating subsystem adds including No. zero high pressure
Hot device 12, high steam pipeline 15 and steam valve 16.High steam pipeline 15 is provided with steam valve 16, and pipeline one end is with mending
Pipeline after steam control valve 17 is communicated, and the other end is connected with No. zero high-pressure heater 12.No. zero high-pressure heater 12 is installed on No. 1
Height Jia 11 between economizer 2, boiler feedwater flow through successively it is No. 1 high Jia 11, No. zero high-pressure heater 12 and economizer 2.Work as machine
During group underrun, open the high steam after filling regulating valve 17 and steam valve 16, filling regulating valve 17 and enter No. zero
High-pressure heater 12 is heated from No. 1 high plus outlet boiler feedwater, improves the temperature of the exiting flue gas of air preheater 4, is that desulfurization is given up
Water evaporation provides higher heat energy.The temperature for entering the flue gas of denitration device 3 is also improved simultaneously, lifts denitration efficiency.
" desulfurization wastewater evaporation " subsystem includes waste water baffle-box 23, waste water filtering reducing device 7, waste water preheater 8, water
The position of pump 9, air compressor 27, atomizer 10 and desulfurization wastewater pipeline 14, aforementioned device and waste water is using resistance to
Acid etching materials make.The waste water flowed out by desulfurizing tower 6 sequentially passes through waste water baffle-box 23, waste water filtering reducing device 7, waste water
Preheater 8, water pump 9 and atomizer 10.The entrance of waste water baffle-box 23 is connected with the outlet of desulfurizing tower 6, and desulfurization wastewater is through slow
Enter waste water filtering reducing device 7 after punching.Waste water filtering reducing device 7 uses principle of reverse osmosis, is made up of multiple standalone modules,
It can put into operation and clean in batches, run without interruption；Desulfurization wastewater is filtered into high-concentration waste water and clear water by the device, and wherein clear water can
Recycle, high-concentration waste water (40%-70% for accounting for raw water amount) flows to waste water preheater 8.Waste water preheater 8 changes for tubular type
Hot device, is installed in the flue between electric cleaner 5 and desulfurizing tower 6；It is low-temp desulfurization waste water in heat exchanger tube, outer pipe is high temperature cigarette
Gas, wastewater temperature gets a promotion through heat exchange.The waste water that waste water preheater 8 is exported is sent to atomizer 10 through water pump 9, water pump 9 with
Air compressor 27 is connected between atomizer 10；Air compressor 27 provides the air of certain pressure intensity, lifts atomizer
The atomizing effect of 10 pairs of waste water.Atomizer 10 is installed on the flue inner top between air preheater 4 and electric cleaner 5, in order to increase
The heat-exchange time that liquid feeding is dropped in flue, the side of air preheater 4 need to be disposed adjacent to as far as possible；The nozzle gives up the desulfurization of high concentration
Water smoke turns to the droplet cluster below 70 μm of average grain diameter and sprayed in flue；Drop absorbs fume waste heat evaporation in flue,
The solid particulate matter of generation is caught with flue gas into electric cleaner 5 by electrode, realizes the zero-emission of desulfurization wastewater.
Embodiment 3：
As shown in figure 3, concurrent heating subsystem includes No. zero high-pressure heater 12, jet type heat pump 18, high steam pipeline 15
(with 21,22), steam valve 16 (with 19,20).High steam pipeline 21 is provided with steam valve 19, pipeline one end and boiler screen
Formula superheater jet chimney is communicated, and the other end is connected with the driving steam inlet of jet type heat pump 18；Set on high steam pipeline 22
There is steam valve 20, pipeline one end is communicated with No. 1 high plus extraction line, and the other end sucks steam inlet phase with jet type heat pump 18
Even；High steam pipeline 15 is provided with steam valve 16, and pipeline one end is connected with the steam (vapor) outlet of jet type heat pump 18, the other end and
No. zero high-pressure heater 12 is connected；No. zero high-pressure heater 12 be installed on it is No. 1 high Jia 11 between economizer 2, boiler feedwater according to
It is secondary flow through it is No. 1 high Jia 11, No. zero high-pressure heater 12 and economizer 2.When performing low-load running of machine set, opening steam valve 16,
19 and 20.Steam from boiler platen superheater enters jet type heat pump nozzle 18 through high steam pipeline 21, and injection comes from 1
It is number high plus part draw gas (through high steam pipeline 22), enter No. zero high through high steam pipeline 15 after the mixing of two parts steam
Pressure heater 12 is heated from No. 1 high plus outlet boiler feedwater, is improved the temperature of the exiting flue gas of air preheater 4, is desulfurization wastewater
Evaporation provides higher heat energy.The temperature for entering the flue gas of denitration device 3 is also improved simultaneously, lifts denitration efficiency.
Desulfurization wastewater evaporative subsystem includes waste water baffle-box 23, waste water filtering reducing device 7, waste water preheater 26, cigarette
Gas waste heat recoverer 25, heating agent water-circulating pump 24, water pump 9, atomizer 10 and desulfurization wastewater pipeline 14, the said equipment and waste water
The position of contact is made using acid corrosion-resistant material.The waste water flowed out by desulfurizing tower 6 sequentially passes through waste water baffle-box 23, waste water
Filter reducing device 7, waste water preheater 26, water pump 9 and atomizer 10.The entrance of waste water baffle-box 23 goes out with desulfurizing tower 6
Mouth is connected, and enters waste water filtering reducing device 7 after desulfurization wastewater is buffered.Waste water filtering reducing device 7 uses principle of reverse osmosis,
It is made up of multiple standalone modules, can puts into operation and clean in batches, is run without interruption；Desulfurization wastewater is filtered into high-concentration waste by the device
Water and clear water, wherein clear water recoverable, high-concentration waste water (40%-70% for accounting for raw water amount) flow into waste water preheater
26.Waste water preheater 26 is pipe heat exchanger, and outer pipe is low-temp desulfurization waste water, and interior pipe is high temperature heat medium water, and wastewater temperature is through changing
Heat gets a promotion；The equipment is connected by heating agent waterpipe with fume waste heat recover 25, and heat medium water is set on heating agent waterpipe
Circulating pump 24.Fume waste heat recover 25 is pipe heat exchanger, is arranged in the flue between electric cleaner 5 and desulfurizing tower 6；Its
It is low temperature heat medium water in pipe, outer pipe is high-temperature flue gas, and through exchanging heat, flue gas transfers heat to heat medium water.Flowed by waste water preheater 26
The desulfurization wastewater gone out is sent to atomizer 10 through water pump 9.Atomizer 10 is installed on the cigarette between air preheater 4 and electric cleaner 5
Road inner top, in order to increase heat-exchange time of the drop in flue, the side of air preheater 4 need to be disposed adjacent to as far as possible；The nozzle
The desulfurization wastewater of high concentration is atomized as the droplet cluster below 70 μm of average grain diameter and sprayed in flue；Drop is inhaled in flue
Fume waste heat evaporation is received, the solid particulate matter of generation is caught with flue gas into electric cleaner 5 by electrode, realizes the zero of desulfurization wastewater
Discharge.
Finally it should be noted that：The explanation of the present invention is the foregoing is only, is not intended to limit the invention, although to this hair
Bright to be described in detail, for those skilled in the art, it still can be to foregoing described technical scheme
Modify, or equivalent substitution is carried out to which part technical characteristic.Within the spirit and principles of the invention, made
Any modification, equivalent substitution and improvements etc., should be included in the scope of the protection.
Claims (10)
1. the comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load, it is characterised in that including concurrent heating
System and desulfurization wastewater evaporative subsystem；Described concurrent heating subsystem includes No. zero high-pressure heater, high steam pipeline with steaming
Steam valve door；Described desulfurization wastewater evaporative subsystem includes waste water baffle-box, waste water filtering reducing device, waste water preheater, water
Pump, atomizer and waste pipe.
2. the comprehensive improvement system of desulfurization wastewater and thermal flue gas, its feature under running on the lower load according to claim 1
It is, No. zero high-pressure heater is connected by high steam pipeline with high-quality vapour source, No. zero high-pressure heater and heat regenerative system
Heaters at different levels series connection, be arranged in No. 1 between high-pressure heater and economizer.
3. the comprehensive improvement system of desulfurization wastewater and thermal flue gas, its feature under running on the lower load according to claim 1
It is, waste water baffle-box is connected with desulfurizing tower, waste water baffle-box, waste water filtering reducing device, waste water preheater, water pump and atomization
Nozzle is sequentially connected, and atomizer is arranged in the flue top between air preheater and electric cleaner, by desulfurization wastewater atomized spray
In in flue.
4. the comprehensive improvement system of desulfurization wastewater and thermal flue gas, its feature under running on the lower load according to claim 1
It is, high steam pipeline one end of concurrent heating subsystem is connected with steam turbine high-pressure cylinder perforate, the other end and No. zero hyperbaric heating
Device is connected.
5. the comprehensive improvement system of desulfurization wastewater and thermal flue gas, its feature under running on the lower load according to claim 1
It is, turbine system is provided with filling regulating valve, high steam pipeline one end and the pipe after filling regulating valve of concurrent heating subsystem
Road is communicated, and the other end is connected with No. zero high-pressure heater.
6. the comprehensive improvement system of desulfurization wastewater and thermal flue gas, its feature under running on the lower load according to claim 1
It is, concurrent heating subsystem includes No. zero high-pressure heater, jet type heat pump, the first high steam pipeline, the second high-pressure steam pipe
Road, the 3rd high steam pipeline, steam valve；First high steam pipeline one end and boiler platen superheater jet chimney phase
Logical, the other end is connected with jet type heat pump driving steam inlet；Second high steam pipeline one end and No. 1 high plus extraction line phase
Logical, the other end is connected with jet type heat pump suction steam inlet；3rd high steam pipeline one end goes out with jet type heat pump steam
Mouth connection, the other end is connected with No. zero high-pressure heater.
7. the comprehensive improvement system of desulfurization wastewater and thermal flue gas, its feature under running on the lower load according to claim 1
It is, waste water filtering reducing device uses principle of reverse osmosis；Desulfurization wastewater is filtered into high-concentration waste water and clear water, wherein clear water
Water resource recycling is carried out, high-concentration waste water is evaporated.
8. the comprehensive improvement system of desulfurization wastewater and thermal flue gas, its feature under running on the lower load according to claim 1
It is, waste water filtering reducing device is made up of multiple standalone modules, is conducted batch-wise and puts into operation and clean, carries out overall uninterrupted fortune
OK.
9. the comprehensive improvement system of desulfurization wastewater and thermal flue gas, its feature under running on the lower load according to claim 1
It is, waste water preheater is pipe heat exchanger, is installed in the flue between electric cleaner and desulfurizing tower；It is low temperature in heat exchanger tube
Desulfurization wastewater, outer pipe is high-temperature flue gas；Or waste water preheater is pipe heat exchanger, outer pipe is to be in low-temp desulfurization waste water, pipe
High temperature heat medium water, waste water preheater is connected by heating agent waterpipe with fume waste heat recover；Fume waste heat recover is tubular type
Heat exchanger, is arranged in the flue between electric cleaner and desulfurizing tower, and it is low temperature heat medium water that it, which is managed interior, and outer pipe is high-temperature flue gas.
10. the comprehensive improvement system of desulfurization wastewater and thermal flue gas, its feature under running on the lower load according to claim 1
It is, air compressor is connected between desulfurization wastewater water pump and atomizer there is provided the air of certain pressure intensity, lifting waste water
Atomizing effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710412458.1A CN107143841A (en) | 2017-05-22 | 2017-05-22 | The comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710412458.1A CN107143841A (en) | 2017-05-22 | 2017-05-22 | The comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107143841A true CN107143841A (en) | 2017-09-08 |
Family
ID=59780892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710412458.1A Pending CN107143841A (en) | 2017-05-22 | 2017-05-22 | The comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107143841A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935292A (en) * | 2017-12-27 | 2018-04-20 | 大唐环境产业集团股份有限公司 | The system and method for smoke discharging residual heat evaporation desulfurization wastewater are utilized under running on the lower load |
| CN107973475A (en) * | 2017-12-27 | 2018-05-01 | 大唐环境产业集团股份有限公司 | Desulfurization wastewater Zero discharging system and method based on waste heat reuse under running on the lower load |
| CN108049925A (en) * | 2017-12-22 | 2018-05-18 | 安徽三联学院 | A kind of industrial wastewater power device using thermal energy of exhaust gas and its work method |
| CN108128956A (en) * | 2017-12-27 | 2018-06-08 | 大唐环境产业集团股份有限公司 | A kind of width load denitration and the desulfurization wastewater Zero discharging system and method for UTILIZATION OF VESIDUAL HEAT IN |
| CN108190986A (en) * | 2018-02-06 | 2018-06-22 | 华电电力科学研究院有限公司 | A kind of flue is classified pre- thermal evaporation desulfurization wastewater Zero discharging system and its method of work |
| CN108613164A (en) * | 2018-04-08 | 2018-10-02 | 大唐(北京)能源管理有限公司 | The feed heating system of denitration effect under a kind of improvement underload |
| CN109282274A (en) * | 2018-11-15 | 2019-01-29 | 上海发电设备成套设计研究院有限责任公司 | A kind of liquid metal heat-transfer Turbo-generator Set and its working method |
| CN109455867A (en) * | 2018-12-28 | 2019-03-12 | 大唐环境产业集团股份有限公司 | A kind of flexibly adjustable thermal power plant's full load high-salinity wastewater zero-emission system and method |
| CN110056854A (en) * | 2019-04-03 | 2019-07-26 | 东南大学 | The steam-supplying system and operation method of No. zero high-pressure heater in a kind of coal unit |
| CN110056853A (en) * | 2019-05-13 | 2019-07-26 | 国家电投集团电站运营技术（北京）有限公司 | Boiler thermodynamic system and its control method |
| CN111302424A (en) * | 2020-03-27 | 2020-06-19 | 中国华能集团清洁能源技术研究院有限公司 | Low-energy-consumption desulfurization wastewater treatment system and working method thereof |
| CN117886386A (en) * | 2024-03-14 | 2024-04-16 | 南京依涛环保科技有限公司 | Single-fluid spray evaporation system for drying desulfurization wastewater concentrated solution |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1176750A (en) * | 1997-09-08 | 1999-03-23 | Mitsubishi Heavy Ind Ltd | Flue gas treating device |
| CN104061564A (en) * | 2014-07-16 | 2014-09-24 | 中国电力工程顾问集团华东电力设计院 | 0# high-pressure heater system with back heating crossing units |
| CN204550303U (en) * | 2015-03-11 | 2015-08-12 | 中国华电集团科学技术研究总院有限公司 | Desulfurization wastewater underload evaporation process system |
| CN204880082U (en) * | 2015-06-17 | 2015-12-16 | 大唐(北京)能源管理有限公司 | Improve denitrification effect's water heating system that gives |
| CN105481157A (en) * | 2015-12-18 | 2016-04-13 | 王辛平 | Method for zero emission treatment of desulfurization waste water based on flue gas waste heat evaporation |
| CN105953213A (en) * | 2016-05-16 | 2016-09-21 | 长沙湘资生物科技有限公司 | Hot-pressing type ultra supercritical unit number-zero high-pressure heater and switching system thereof |
| CN106587235A (en) * | 2017-02-09 | 2017-04-26 | 北京哈宜节能环保科技开发有限公司 | Full-load gradient flue gas waste heat evaporative waste water control system and control method thereof |
| CN207006110U (en) * | 2017-05-22 | 2018-02-13 | 大唐(北京)能源管理有限公司 | The comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load |
-
2017
- 2017-05-22 CN CN201710412458.1A patent/CN107143841A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1176750A (en) * | 1997-09-08 | 1999-03-23 | Mitsubishi Heavy Ind Ltd | Flue gas treating device |
| CN104061564A (en) * | 2014-07-16 | 2014-09-24 | 中国电力工程顾问集团华东电力设计院 | 0# high-pressure heater system with back heating crossing units |
| CN204550303U (en) * | 2015-03-11 | 2015-08-12 | 中国华电集团科学技术研究总院有限公司 | Desulfurization wastewater underload evaporation process system |
| CN204880082U (en) * | 2015-06-17 | 2015-12-16 | 大唐(北京)能源管理有限公司 | Improve denitrification effect's water heating system that gives |
| CN105481157A (en) * | 2015-12-18 | 2016-04-13 | 王辛平 | Method for zero emission treatment of desulfurization waste water based on flue gas waste heat evaporation |
| CN105953213A (en) * | 2016-05-16 | 2016-09-21 | 长沙湘资生物科技有限公司 | Hot-pressing type ultra supercritical unit number-zero high-pressure heater and switching system thereof |
| CN106587235A (en) * | 2017-02-09 | 2017-04-26 | 北京哈宜节能环保科技开发有限公司 | Full-load gradient flue gas waste heat evaporative waste water control system and control method thereof |
| CN207006110U (en) * | 2017-05-22 | 2018-02-13 | 大唐(北京)能源管理有限公司 | The comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108049925B (en) * | 2017-12-22 | 2020-04-07 | 安徽三联学院 | Industrial wastewater and waste gas heat energy power device and acting method thereof |
| CN108049925A (en) * | 2017-12-22 | 2018-05-18 | 安徽三联学院 | A kind of industrial wastewater power device using thermal energy of exhaust gas and its work method |
| CN107973475A (en) * | 2017-12-27 | 2018-05-01 | 大唐环境产业集团股份有限公司 | Desulfurization wastewater Zero discharging system and method based on waste heat reuse under running on the lower load |
| CN108128956A (en) * | 2017-12-27 | 2018-06-08 | 大唐环境产业集团股份有限公司 | A kind of width load denitration and the desulfurization wastewater Zero discharging system and method for UTILIZATION OF VESIDUAL HEAT IN |
| CN107935292A (en) * | 2017-12-27 | 2018-04-20 | 大唐环境产业集团股份有限公司 | The system and method for smoke discharging residual heat evaporation desulfurization wastewater are utilized under running on the lower load |
| CN108190986A (en) * | 2018-02-06 | 2018-06-22 | 华电电力科学研究院有限公司 | A kind of flue is classified pre- thermal evaporation desulfurization wastewater Zero discharging system and its method of work |
| CN108613164A (en) * | 2018-04-08 | 2018-10-02 | 大唐(北京)能源管理有限公司 | The feed heating system of denitration effect under a kind of improvement underload |
| CN109282274A (en) * | 2018-11-15 | 2019-01-29 | 上海发电设备成套设计研究院有限责任公司 | A kind of liquid metal heat-transfer Turbo-generator Set and its working method |
| CN109455867A (en) * | 2018-12-28 | 2019-03-12 | 大唐环境产业集团股份有限公司 | A kind of flexibly adjustable thermal power plant's full load high-salinity wastewater zero-emission system and method |
| CN109455867B (en) * | 2018-12-28 | 2023-04-25 | 大唐环境产业集团股份有限公司 | Flexible and adjustable thermal power plant full-load high-salinity wastewater zero-emission system and method |
| CN110056854A (en) * | 2019-04-03 | 2019-07-26 | 东南大学 | The steam-supplying system and operation method of No. zero high-pressure heater in a kind of coal unit |
| CN110056854B (en) * | 2019-04-03 | 2020-03-31 | 东南大学 | Steam supply system of zero-number high-pressure heater in coal-fired unit and operation method |
| CN110056853A (en) * | 2019-05-13 | 2019-07-26 | 国家电投集团电站运营技术（北京）有限公司 | Boiler thermodynamic system and its control method |
| CN111302424A (en) * | 2020-03-27 | 2020-06-19 | 中国华能集团清洁能源技术研究院有限公司 | Low-energy-consumption desulfurization wastewater treatment system and working method thereof |
| CN117886386A (en) * | 2024-03-14 | 2024-04-16 | 南京依涛环保科技有限公司 | Single-fluid spray evaporation system for drying desulfurization wastewater concentrated solution |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107143841A (en) | The comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load | |
| CN206950940U (en) | High energy efficiency flue gas desulphurization system | |
| CN107032428B (en) | System and method for zero emission treatment of undersaturated flue gas concentration crystallization desulfurization wastewater | |
| CN106215563A (en) | Garbage-incineration smoke purifying processing system | |
| CN107036115A (en) | A kind of system of deep exploitation residual heat from boiler fume and pollutant removing | |
| CN106474860A (en) | Wet desulfurization flue gas processing system and processing method | |
| CN105536484B (en) | A kind of pollutant pre-corrosion tower based on flue gas condensing | |
| CN107973475A (en) | Desulfurization wastewater Zero discharging system and method based on waste heat reuse under running on the lower load | |
| CN107935292A (en) | The system and method for smoke discharging residual heat evaporation desulfurization wastewater are utilized under running on the lower load | |
| CN106731538A (en) | A kind of dry desulfurization dust pelletizing system and its flue gas water saving fixtures | |
| CN107473301A (en) | A kind of desulfurization wastewater low-temperature evaporation processing system | |
| CN104150552A (en) | Distillation drying tower for treating desulfurized waste water in thermal power plant | |
| CN102980198B (en) | Washing condensing smoke triple recovery device | |
| CN108128956A (en) | A kind of width load denitration and the desulfurization wastewater Zero discharging system and method for UTILIZATION OF VESIDUAL HEAT IN | |
| CN107777820A (en) | The technique that Air-Cooling Island exhaust steam residual heat is used for Waste Water From Fire Power Plant zero discharge treatment | |
| CN107686141A (en) | A kind of desulfurization wastewater low-temperature evaporation concentration systems | |
| CN206799197U (en) | A kind of undersaturation flue gas condensing crystallizing desulfurization wastewater zero-discharge treatment system | |
| CN106801884A (en) | A kind of smoke comprehensive processing unit and its method | |
| CN207006110U (en) | The comprehensive improvement system of desulfurization wastewater and thermal flue gas under a kind of running on the lower load | |
| EP2584256A1 (en) | Oxygen preheating in oxyfuel combustion system | |
| CN210544082U (en) | Heat exchange type waste heat recovery and waste gas purification device | |
| CN205386406U (en) | Pollutant pretreater based on flue gas condensation | |
| CN207748983U (en) | A kind of desulfurization wastewater Zero discharging system of width load denitration and UTILIZATION OF VESIDUAL HEAT IN | |
| CN207845404U (en) | Desulfurization wastewater Zero discharging system based on waste heat reuse under a kind of running on the lower load | |
| CN207845196U (en) | A kind of desulfurization wastewater low-temperature evaporation concentration systems |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170908 |