CN207006110U - 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
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- CN207006110U CN207006110U CN201720646203.7U CN201720646203U CN207006110U CN 207006110 U CN207006110 U CN 207006110U CN 201720646203 U CN201720646203 U CN 201720646203U CN 207006110 U CN207006110 U CN 207006110U
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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
It the utility model is related to and thermal flue gas evaporation desulfurization wastewater is recycled under a kind of coal-burning power plant's running on the lower load
System, the system can realize the zero-emission of desulfurization wastewater under running on the lower load while improve unit capacity usage ratio, belong to firepower
Generating energy emission reduction field.
Background technology
In order to reach country to coal-burning power plant SO2The requirement of minimum discharge, domestic power plant are mostly wet using limestone-gypsum
Method flue gas desulfurization technique, the technology generate serious discharge of wastewater while high-efficiency desulfurization.In April, 2015, State Council's hair
Cloth《Water pollution action plan》Enhance the preventing and treating dynamics 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 header methods) 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 atomization is the flue sprayed into after drop between air preheater and electric cleaner by technology, utilizes boiler tail thermal flue gas
Waste water is evaporated, caused fine solid particle thing is caught by electric cleaner, and 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 lead to the decline of exhaust gas temperature, when shortage of heat contained by flue gas is with set
When desulfurization wastewater is evaporated in the time, drop will attach to stack inner surface or into electric cleaner, easily cause corrosion and scaling and
Electric cleaner failure, desulfurization wastewater flue evaporation technique will be unable to come into operation.Improve the row of 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.Transported in unit underload
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.In order to solve the problems, such as running on the lower load denitration, " No. zero high-pressure heater " technology is suggested and gradually promoted should
With.In No. 1 height of Steam Turbine Regenerative System, rear (pressing to Water flow-path) sets up primary heater (i.e. No. zero hyperbaric heating to the technology in addition
Device), the heater draws the boiler feedwater that steam heating adds outlet from No. 1 height 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, increases heat loss due to exhaust gas；Although desulfurization wastewater flue evaporation technique can
To realize the zero-emission of waste water, but must be premised on the boiler exhaust gas waste heat of abundance.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.
Utility model content
The utility model provides a kind of system of combined desulfurization waste water evaporative subsystem and concurrent heating subsystem, can be in coal-fired electricity
The zero-emission of desulfurization wastewater and the recycling of thermal flue gas are realized under factory's running on the lower load.Desulfurization wastewater evaporative subsystem is used for
Desulfurization wastewater is pre-processed (filtering decrement and preheating), and flue of the atomized spray between air preheater and electric cleaner
In；Pretreatment can reduce waste water and required heat energy is evaporated in flue；Waste water finally absorbs smoke exhaust heat in flue and evaporated,
Caused particulate matter is captured into electric cleaner.Concurrent heating subsystem is used for improving boiler feedwater and exhaust gas temperature, can be waste water
Evaporation provides more sufficient heat energy and shortens its evaporation time in flue；In addition, it can also improve under unit running on the lower load
Denitration efficiency.
The technical solution adopted in the utility model 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 communicates, 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 communicates, and the other end is connected with jet type heat pump driving steam inlet；Second high steam pipeline one end adds with No. 1 height
Extraction line communicates, 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, it is high-temperature flue gas that pipe is outer；Or waste water preheater is pipe heat exchanger, it is low-temp desulfurization that pipe is outer
Waste water, pipe in be high temperature heat medium water, waste water preheater is connected by heating agent waterpipe with fume waste heat recover；Fume waste heat returns
Receipts device is pipe heat exchanger, is arranged in the flue between electric cleaner and desulfurizing tower, is low temperature heat medium water in its pipe, and pipe is outer to be
High-temperature flue gas.
Further, it is connected with air compressor 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 utility model is directed to the present situation of the long-term underrun of domestic coal unit, using connection
Close the mode of desulfurization wastewater evaporative subsystem and concurrent heating subsystem, mainly solve under running on the lower load unit exhaust gas temperature compared with
Low, desulfurization wastewater in flue the problem of evaporating completely, can not realize the zero-emission of desulfurization wastewater, improve electric cleaner fortune
Capable security；Under unit rated load, concurrent heating subsystem can be closed, desulfurization wastewater evaporative subsystem can equally be realized useless
Water zero discharge；Effective recycling unit thermal flue gas, improves capacity usage ratio；Improve under unit running on the lower load
Denitration efficiency；Waste water drop, which is atomized, to be sprayed in the reunion in flue, being advantageous to wherein tiny particles content, is subtracted to a certain extent
Few soot emissions.
Brief description of the drawings
Fig. 1 is the structural representation of embodiment one of the present utility model；
Fig. 2 is the structural representation of embodiment two of the present utility model；
Fig. 3 is the structural representation of embodiment three of the present utility model；
Wherein：1- boilers, 2- economizers, 3- denitration devices, 4- air preheaters, 5- electric cleaners, 6- desulfurizing towers, 7- waste water mistakes
Filter reducing device, 8- waste water preheaters, 9- water pumps, 10- atomizers, 11-1 height 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, the technical solution of the utility model 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 utility model passes through flue gas after high-pressure heater concurrent heating subsystem raising air preheater
Temperature, more sufficient heat energy is provided for waste water evaporation, while shorten its evaporation time；Desulfurization wastewater first pass around filtering decrement and
The pretreatment such as preheating, reduces it and required heat energy is evaporated in flue, sprayed thereafter by atomizer in air preheater and electricity
In flue between deduster, moisture absorption flue gas heat is evaporated, and caused particulate matter 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, and being connected to No. 1 height by boiler feedwater pipeline adds between economizer, feedwater
Flow through successively No. 1 height add, 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, heat from No. 1 height add the boiler of outlet to
Water, the boiler feedwater after heating are sent to economizer and boiler successively.Because boiler feed temperature is significantly improved, economizer
Middle flue gas and the heat exchange amount of feedwater reduce, 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 increase high-quality steam is taken out
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
Utility model can improve about 10-25 DEG C of the temperature of economizer exit flue gas, reach denitration by the concurrent heating subsystem set up
The active reaction temperature of catalyst, the denitration efficiency (can reach 80%-90%) under performing low-load running of machine set can be lifted.
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, pass through waste water filtering reducing device, waste water preheater, water pump and mist after desulfurization wastewater is buffered successively
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 preheats to desulfurization wastewater between desulfurizing tower, can improve about 40-70 DEG C of wastewater temperature, while flue-gas temperature
Reduce about 1-2 DEG C.Atomizer is led to through water pump by the desulfurization wastewater that waste water preheater flows out, atomizer is installed on air preheater
Flue top between electric cleaner, desulfurization wastewater can be atomized to (average grain diameter≤70 μm) and sprayed in flue.In flue
In, with flue gas mixing heat-exchange occurs for drop, fully absorbs wherein used heat, moisture is evaporated, and caused solid particulate matter 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 reduces 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
Low-temperature corrosion, which will not occur, influences 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 height
Heater 12 is pressed to be connected.No. zero high-pressure heater 12 is installed on No. 1 height and added between 11 and economizer 2, and boiler feedwater flows through 1 successively
Number height adds 11, No. zero high-pressure heaters 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 heats the boiler feedwater for adding 11 outlets from No. 1 height into No. zero high-pressure heater 12, 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 is successively by 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 after desulfurization wastewater is buffered useless
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, installation
In flue between electric cleaner 5 and desulfurizing tower 6；It is low-temp desulfurization waste water in heat exchanger tube, it is high-temperature flue gas outside to manage, waste water temperature
Degree gets a promotion through heat exchange.The waste water that waste water preheater 8 exports 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, it 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 caused solid particulate matter 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 communicates, 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 adds between 11 and economizer 2, and boiler feedwater flows through No. 1 height and adds 11, No. zero high-pressure heaters 12 and economizer 2 successively.Work as machine
During group underrun, filling regulating valve 17 and steam valve 16 are opened, the high steam after filling regulating valve 17 enters No. zero
High-pressure heater 12 heats the boiler feedwater for adding outlet from No. 1 height, improves the temperature of the exiting flue gas of air preheater 4, is given up for desulfurization
Water evaporation provides higher heat energy.The temperature into 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 is successively by 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, it is installed in the flue between electric cleaner 5 and desulfurizing tower 6；It is low-temp desulfurization waste water in heat exchanger tube, it is high temperature cigarette that pipe is outer
Gas, wastewater temperature get a promotion through heat exchange.The waste water that waste water preheater 8 exports 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,
Caused solid particulate matter 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 communicates, and the other end drives steam inlet to be connected with jet type heat pump 18；Set on high steam pipeline 22
There is steam valve 20, pipeline one end adds extraction line to communicate with No. 1 height, 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 with
No. zero high-pressure heater 12 connects；No. zero high-pressure heater 12 is installed on No. 1 height and added between 11 and economizer 2, boiler feedwater according to
It is secondary to flow through No. 1 height and add 11, No. zero high-pressure heaters 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
The part that number height adds is drawn gas (through high steam pipeline 22), enters No. zero height through high steam pipeline 15 after the mixing of two parts steam
Pressure heater 12 heats the boiler feedwater for adding outlet from No. 1 height, improves the temperature of the exiting flue gas of air preheater 4, is desulfurization wastewater
Evaporation provides higher heat energy.The temperature into 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 is successively by 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 it is low-temp desulfurization waste water that pipe is outer, is high temperature heat medium water in pipe, 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, it is high-temperature flue gas that pipe is outer, 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 atomization of high concentration for the droplet cluster below 70 μm of average grain diameter and is sprayed in flue；Drop is inhaled in flue
Fume waste heat evaporation is received, caused solid particulate matter is caught with flue gas into electric cleaner 5 by electrode, realizes the zero of desulfurization wastewater
Discharge.
Finally it should be noted that：Explanation of the present utility model is the foregoing is only, is not limited to the utility model, to the greatest extent
The utility model is described in detail pipe, and for those skilled in the art, it can still be remembered to foregoing
The technical scheme of load is modified, or carries out equivalent substitution to which part technical characteristic.It is all in spirit of the present utility model
Within principle, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
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 under running on the lower load according to claim 1, its feature
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 under running on the lower load according to claim 1, its feature
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 under running on the lower load according to claim 1, its feature
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 under running on the lower load according to claim 1, its feature
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 communicates, and the other end is connected with No. zero high-pressure heater.
6. the comprehensive improvement system of desulfurization wastewater and thermal flue gas under running on the lower load according to claim 1, its feature
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 adds extraction line phase with No. 1 height
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 are connected with No. zero high-pressure heater.
7. the comprehensive improvement system of desulfurization wastewater and thermal flue gas under running on the lower load according to claim 1, its feature
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 under running on the lower load according to claim 1, its feature
It is, waste water filtering reducing device is made up of multiple standalone modules, is conducted batch-wise and is put into operation and clean, and carries out overall uninterrupted fortune
OK.
9. the comprehensive improvement system of desulfurization wastewater and thermal flue gas under running on the lower load according to claim 1, its feature
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, it is high-temperature flue gas that pipe is outer；Or waste water preheater is pipe heat exchanger, it is low-temp desulfurization waste water that pipe is outer, is in pipe
High temperature heat medium water, waste water preheater are connected by heating agent waterpipe with fume waste heat recover；Fume waste heat recover is tubular type
Heat exchanger, it is arranged in the flue between electric cleaner and desulfurizing tower, is low temperature heat medium water in its pipe, it is high-temperature flue gas that pipe is outer.
10. the comprehensive improvement system of desulfurization wastewater and thermal flue gas under running on the lower load according to claim 1, its feature
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 |
|---|---|---|---|
| CN201720646203.7U CN207006110U (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 |
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