CN109925869A - Flue gas of refuse burning high-efficient purification processing method - Google Patents
Flue gas of refuse burning high-efficient purification processing method Download PDFInfo
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- CN109925869A CN109925869A CN201910291618.0A CN201910291618A CN109925869A CN 109925869 A CN109925869 A CN 109925869A CN 201910291618 A CN201910291618 A CN 201910291618A CN 109925869 A CN109925869 A CN 109925869A
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Abstract
The invention discloses a kind of flue gas of refuse burning high-efficient purification processing methods, it is related to garbage disposal, the problem of particulate pollutant generated after aiming to solve the problem that can not be collected effectively, its key points of the technical solution are that: a kind of flue gas of refuse burning high-efficient purification processing method, it includes: flue system, spraying reaction tower, lime white preparation system, active carbon stocking system, active carbon spraying system, bag dust collector, byproduct transportation system, byproduct storage warehouse and air-introduced machine that gas cleaning, which handles complexes,.A kind of flue gas of refuse burning high-efficient purification processing method of the invention, the problem of optimizing the purified treatment path of flue gas of refuse burning, the particulate pollutant generated after depickling is effectively prevent not collected effectively.
Description
Technical field
The present invention relates to garbage disposals, more specifically, it relates to a kind of flue gas of refuse burning high-efficient purification processing method.
Background technique
House refuse refers to solid waste generating in resident's daily life, being not considered value and abandon, mainly
Including organic matter and inorganic matter two major classes.Organic matter includes kitchen waste material, paper, plastics, plant leaf etc., and inorganic matter includes ash
Soil, glass, metal etc..With the raising of expanding economy and people's quality of life, the collection quantity of rubbish increases year by year, wherein
The content of organic matter is continuously increased.
The environment that so a large amount of house refuse survives for people brings serious pollution.Including atmosphere, soil, water body.
It threatens for human health.The recycling of house refuse, harmless treatment be put it is extremely urgent important to the world
Project.
Currently, domestic rubbish disposal mainly has landfill, compost and burns three big methods.Since incineration method has innoxious journey
The advantages that degree is high, volume reduction amount is big, occupied area is small, processing is timely and recyclable thermal energy, it has also become handle the master of municipal refuse
Want method.
But due to component of refuse complexity, can generate after burning largely has containing heavy metal, dioxin, SO, HCl, HF etc.
Poison, pernicious gas, be discharged into atmosphere with flue gas, become the important component of atmosphere pollution, and accumulate in vivo and with
Biological chain is constantly concentrated.It is very big to environment and human health risk
A kind of dioxin in household garbage incineration smoke class atmosphere that the Chinese patent that notification number is CN105864792B is announced is dirty
The processing method of object is contaminated, be characterized in that: processing unit is made of the equipment being linked in sequence as follows: primary reinforcement combustion furnace,
Secondary reinforcement combustion furnace, porous SiN ceramic filter, counterflow heat exchange waste heat boiler, combined heat pipe exchanger, filter bag remove
Dirt device, acid gas removal system, activated carbon adsorber and air-introduced machine.
In above scheme, after first passing through bag dust collector removing particle contamination, then pass through the depickling of acid gas removal system,
But particulate pollutant can be equally generated during depickling, it can not effectively be received so as to cause the particulate pollutant of rear generation
The problem of collection, occurs；Therefore it needs to propose the new scheme of one kind to solve this problem.
Summary of the invention
In view of the deficiencies of the prior art, the present invention intends to provide at a kind of flue gas of refuse burning high-efficient purification
Reason method optimizes the purified treatment path of flue gas of refuse burning, effectively prevent the particulate pollutant generated after depickling that can not be had
The problem of effect is collected.
Above-mentioned technical purpose of the invention has the technical scheme that a kind of flue gas of refuse burning is efficient
Purifying treatment method, gas cleaning processing complexes include: flue system, spraying reaction tower, lime white preparation system,
Active carbon stocking system, active carbon spraying system, bag dust collector, byproduct transportation system, byproduct storage warehouse and air inducing
Machine；It the treating method comprises following steps: step 1: so that waste heat boiler comes out about 190 DEG C -240 DEG C of flue gas through flue gas
Pipe-line system enters spraying reaction tower by top, prepares lime white as absorbent by lime white preparation system at the same time, with
Fine mist shape sprays into spray reaction top of tower, comes into full contact with the absorbent droplet with very high surface area with flue gas, occurs
Strong chemical reaction and heat exchange absorbs the acid contaminant in flue gas, while the waste heat in flue gas steams absorbent droplet
It is dry；Step 2: the big quality byproduct that can not be driven by air-introduced machine gas pressure generated after step 1 depickling, by anti-by spraying
It answers tower bottom to drop out and be delivered in byproduct storage warehouse by byproduct transportation system to be stored；Step 3: de- through step 1
Polluted gas after acid is driven by air-introduced machine gas pressure towards bag dust collector, and in the process advanced in flue system
In, the active carbon particle receptor 1 activity charcoal spraying system effect injection that stores in active carbon stocking system in flue system,
To which active carbon particle enters bag dust collector in company with polluted gas together, active carbon particle sufficiently adsorbs contamination gas during this
Organic pollutant and metal pollutant in body form volume sufficiently large machine pollutant, metal pollutant and active carbon group
Zoarium is stranded in bag dust collector, and treated that tail gas is discharged through air-introduced machine for final purification.
By using above-mentioned technical proposal, the particular technique effect that step 1 is individually implemented has: 1. flue gases are in preboiler
It radiates to after 190 DEG C -240 DEG C, then imports spraying reaction tower and carry out depickling, high temperature is effectively reduced for flue system and spray
The service life of mist reaction tower influences；2. using lime white preparation system in deacidification, synchronizes and prepare lime white as suction
Agent is received, compared to calcium hydroxide emulsion is directly supplied, effectively reduces storage and transportation cost；3. spraying lime white using atomization
Absorbent so that it is guaranteed that flue gas and lime white absorbent come into full contact with, and then improves deacidification efficiency；4. being evaporated suction using waste heat
The moisture content of agent droplet is received, so that it is guaranteed that the aridity of big quality byproduct, avoids the later period from needing to be carried out dehydrating byproduct.
The particular technique effect that step 2 is individually implemented has: the air pressure that 1. air-introduced machines are not necessarily to undertake big quality byproduct pushes away
It send, so as to lower the operation power of air-introduced machine, and then reduces the operating cost of equipment；2. flue system is without supply
The conveying of big quality byproduct, to reduce the hidden danger that flue system blocks；3. mistake needed for reducing bag dust collector
The amount of substance of filter, to improve the filter efficiency of bag dust collector.
The particular technique effect that step 3 is individually implemented has: 1. by spurting into flue system for active carbon particle,
To realize during flue gas enters bag dust collector by spraying reaction tower, that is, start organic pollutant and metal pollutant
Adsorption cleaning, and then improve the efficiency of adsorption cleaning；2. active carbon is with organic pollutant in synchronous in flue system
Advance, both processes are motion state, ensure that coming into full contact with for the two, and then improve the effect of adsorption cleaning；
3. entering the active carbon inside bag dust collector, part is not yet adsorbed to saturation state, and the weight of the amount of activated charcoal is smaller, will
The gas pressure that will receive air-introduced machine fits in the filter bag surface of bag dust collector, to form one layer of activity in filter bag surface
Charcoal adsorption layer, and then further organic pollutant and metal pollutant are adsorbed by activated carbon adsorption layer, it realizes to pollution
Second of absorption of object, while improving absorption purifying effect, effectively improves the utilization rate for active carbon.
Step 1: Step 2: there is generated technical effect after step 3 combines: the purification of 1. optimization flue gas of refuse burning
Processing path, i.e., first depickling are adsorbed afterwards, are refiltered, compared to technical solution provided by cited paper, after effectivelying prevent depickling
The problem of particulate pollutant of generation can not be collected effectively；2. without shorter with service life, and can not continuously transport
Capable activated carbon adsorber, herein it is to be appreciated that the absorbability of activated carbon adsorber is limited, when being absorbed into saturation state,
It needs to carry out desorption processing, whole equipment is unable to operate normally during being somebody's turn to do；3. by entire purified treatment optimization order simplify to
Three steps effectively increase purified treatment efficiency, reduce equipment operating cost.
The present invention is further arranged to: the spraying reaction tower sprays the preparation of lime white preparation system using swivel nozzle
Absorbent, the size droplet diameter of absorbent are greater than 10s less than 50 μm, in the stay time in spraying reaction tower.
By using above-mentioned technical proposal, lime white absorbent is sprayed using swivel nozzle, so as to guarantee in slurries
When flow varies widely, the particle diameter distribution of atomized drop is not significantly changed, and is become to the flow of flue gas, temperature and ingredient
That changes has better adaptability；The size droplet diameter of absorbent is limited, so that the absorbent of equivalent has bigger range of scatter,
To ensure coming into full contact with for absorbent and flue gas；The stay time for limiting absorbent, so that it is guaranteed that acid contaminant and absorbent
Reaction time, and then ensure deacidification effect.
The present invention is further arranged to: the lime white preparation system is matched including the first storage bin, technique water tank, lime white
Slot and lime white storage tank processed and lime white pump machine are provided with the first lock between first storage bin and lime white make-up tank
Mechanism of qi is provided with technique water pump between the technique water tank and lime white make-up tank；The lime white absorbent preparation step is such as
Under: starting the first air locking machine guidance lime white raw material enters lime white make-up tank, and starting technique water pump driving process water enters stone
Mortar formulation slot, stand-by through manufactured lime white absorbent importing lime white storage tank after being sufficiently stirred by lime white make-up tank, stone
Mortar storage tank should uninterruptedly stir lime white absorbent in storing process；When it is desired to be used, stone is extracted by lime white pump machine
Mortar absorbent is simultaneously supplied to spraying reaction tower.
Lead to by using above-mentioned technical proposal by the first air locking machine by lime white feedstock transportation to lime white make-up tank
It crosses technique water pump and process water is pumped into lime white make-up tank, to be stirred by lime white make-up tank, and then ensure the dense of lime white
Uniformity is spent, simultaneously, it is only necessary to control the power of technique water pump, lime white can be adjusted according to the concentration of acid contaminant in flue gas
Concentration；Lime white after completing preparation is directed in lime white storage tank for use, so that it is guaranteed that lime white preparation system is always
Have sufficient lime white and be supplied to spraying reaction tower, and then ensures the continuous operation of whole equipment；Lime white storage tank is storing
Lime white absorbent should be uninterruptedly stirred in the process, to avoid leading to the reality for influencing lime white because of precipitating because of long-time storage
Border concentration.
The present invention is further arranged to: the lime white raw material stored in first storage bin is calcium hydroxide powder.
By using above-mentioned technical proposal, with calcium hydroxide Ca (OH) 2As lime white raw material, compared to calcium oxide CaO
It as raw material, avoids and generates amount of heat when preparing lime white, be contaminated so as to cause environment and lime white is prepared
The problem of rabbling mechanism heat damage of slot.
The present invention is further arranged to: the active carbon stocking system includes active carbon storage bin, scale hooper, and setting
The second air locking machine between active carbon storage bin and scale hooper；In active carbon supply process, starting the second air locking machine guidance
Active carbon enters in scale hooper, and through being sprayed by active carbon spraying system after weighing.
By using above-mentioned technical proposal, active carbon is sprayed by active carbon spraying system again after being weighed by scale hooper, from
And realize the control to active carbon spray volume.
The present invention is further arranged to: the active carbon spraying system includes injection blower, connection flue system
Active carbon pipeline, and the third air locking machine being set between scale hooper and active carbon pipeline；During spraying active carbon, together
Step starting third air locking machine and injection blower, so that the active carbon after weighing enters active carbon pipeline and by the gas of injection blower
Pressure effect, is injected into flue system through active carbon pipeline.
By using above-mentioned technical proposal, injection blower is individually added for pushing active carbon, is effectively prevent because needing to increase
The problem for adding the conveying of active carbon, and causing the operating load of air-introduced machine excessive occurs.
The present invention is further arranged to: the gas cleaning processing complexes further include supplement deacidification system, the benefit
Fill deacidification system include third storage bin, screw conveyor, supplement pipeline, and be set to supplement pipeline and screw conveyor it
Between the 4th air locking machine, the supplement pipeline both ends respectively with flue system and injection blower be connected to；Supplement depickling step
It is as follows: when detecting that acid contaminant is greater than discharge standard in discharged tail gas, synchronous averaging screw conveyor and the 4th
Air locking machine by the supplement depickling matter being stored in third storage bin import supplement pipeline, and via injection blower gas pressure into
Enter flue system, to complete the supplement depickling of polluted gas in flue system.
By using above-mentioned technical proposal, depickling matter is supplemented by injection, thus further taking off when realizing case of emergency
Acid, and then ensure that the acid contaminant content of institute's emission meets regulated discharge standard, reach and adapts to high concentrated acid contact scar
The technical effect of object flue gas；Deacidification system is supplemented with the injection blower of active carbon spraying system as driving force, to reduce
Equipment investment.
The present invention is further arranged to: the supplement depickling matter stored in the third storage bin is sodium bicarbonate dry powder.
By using above-mentioned technical proposal, using sodium bicarbonate dry powder NaHCO3As supplement depickling matter, on the one hand due to small
The activity of soda is higher than the activity of calcium hydroxide, so that efficiency when supplement depickling is improved, on the other hand due to the weight of sodium salt
It is lighter than the weight of calcium salt, so that it is guaranteed that the byproduct that depickling generates can be driven by air pressure and enter bag dust collector.
The present invention is further arranged to: the byproduct transportation system is scrapper conveyor, and conveying section connects spraying anti-simultaneously
Tower and bag dust collector are answered, delivery terminal connects byproduct storage warehouse, and the 5th air locking machine is arranged in the spraying reaction tower bottom end,
The bag dust collector bottom end setting opening and closing valve.
By using above-mentioned technical proposal, the by-product that byproduct transportation system simultaneously generates spraying reaction tower
The flying dust that product and bag dust collector filtering generate is collected and transports, to improve equipment for byproduct and flying dust
Collection efficiency.
In conclusion the invention has the following advantages: depickling is carried out at a temperature of 190 DEG C -240 DEG C, to imitate
Reducing high temperature influences the service life of flue system and spraying reaction tower；It synchronizes and prepares lime white as absorbent,
Effectively reduce storage and transportation cost；Lime white absorbent is sprayed using atomization, so that it is guaranteed that flue gas and lime white absorbent
Come into full contact with, and then improve deacidification efficiency；The moisture content of absorbent droplet is evaporated using waste heat, so that it is guaranteed that big quality byproduct
Aridity, avoid the later period from needing to be carried out dehydrating byproduct；The air pressure that air-introduced machine is not necessarily to undertake big quality byproduct pushes away
It send, so as to lower the operation power of air-introduced machine, and then reduces the operating cost of equipment；Flue system is big without supply
The conveying of quality byproduct, to reduce the hidden danger that flue system blocks；Reduce filtering needed for bag dust collector
Amount of substance, to improve the filter efficiency of bag dust collector；During flue gas enters bag dust collector by spraying reaction tower,
Start the adsorption cleaning of organic pollutant and metal pollutant, and then improves the efficiency of adsorption cleaning；Active carbon and organic
Pollutant ensures that coming into full contact with for the two in advanced in unison in flue system, and then improves the effect of adsorption cleaning
Fruit；Layer of active carbon adsorption layer is formed in filter bag surface, and then by activated carbon adsorption layer further to organic pollutant and metal
Pollutant is adsorbed, and is realized to second of pollutant absorption, while improving absorption purifying effect, effectively improve for
The utilization rate of active carbon；The purified treatment path for optimizing flue gas of refuse burning, effectively prevent the particulate pollutant generated after depickling
The problem of can not effectively being collected；Without with service life it is shorter, and can not continuous operation activated carbon adsorber；It will
Entire purified treatment optimization order is simplified to three steps, and purified treatment efficiency is effectively increased, and reduces equipment operating cost.
Detailed description of the invention
Fig. 1 is system schematic of the invention；
Fig. 2 is the system schematic of lime white preparation system of the present invention；
Fig. 3 is the system schematic of active carbon stocking system of the present invention；
Fig. 4 is the system schematic of present invention supplement deacidification system.
Detailed description of the invention: 1, flue system；2, spraying reaction tower；3, lime white preparation system；31, the first storage bin；
32, technique water tank；33, lime white make-up tank；34, lime white storage tank；35, lime white pump machine；36, the first air locking machine；37, technique
Water pump；4, active carbon stocking system；41, active carbon storage bin；42, scale hooper；43, the second air locking machine；5, active carbon injection system
System；51, blower is sprayed；52, active carbon pipeline；53, third air locking machine；6, bag dust collector；7, byproduct transportation system；71,
5th air locking machine；72, valve is opened and closed；8, byproduct storage warehouse；9, air-introduced machine；10, deacidification system is supplemented；101, third storage bin；
102, screw conveyor；103, pipeline is supplemented；104, the 4th air locking machine.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Flue gas of refuse burning high-efficient purification processing method, it includes: as shown in Figure 1, flue gas that gas cleaning, which handles complexes,
Pipe-line system 1, spraying reaction tower 2, lime white preparation system 3, active carbon stocking system 4, active carbon spraying system 5, filter bag remove
Dirt device 6, byproduct transportation system 7, byproduct storage warehouse 8 and air-introduced machine 9.
Processing method comprising the following three steps:
Step 1: so that the flue gas that waste heat boiler comes out about 190 DEG C -240 DEG C is spraying anti-by top entrance through flue system 1
Tower 2 is answered, lime white is prepared as absorbent by lime white preparation system 3 at the same time, spray reaction is sprayed into fine mist shape
2 top of tower, comes into full contact with the absorbent droplet with very high surface area with flue gas, and strong chemical reaction and heat occurs and hands over
It changes, absorbs the acid contaminant in flue gas, while absorbent droplet is evaporated by the waste heat in flue gas；Deacidification is anti-using soda acid
The chemical absorbing principle removing acid contaminant answered, specific chemical principle are as follows:
SO2+ Ca(OH)2→CaSO3+H2O
HCl+Ca(OH)2→CaCL2+H2O
HF+Ca(OH)2→CaF2+H2O
CaSO3+1/2O2→CaSO4
Step 2: the big quality byproduct that can not be driven by 9 gas pressure of air-introduced machine generated after step 1 depickling, by spraying
2 bottom of reaction tower drops out and is delivered in byproduct storage warehouse 8 by byproduct transportation system 7 and stored.
Step 3: the polluted gas after step 1 depickling is driven by 9 gas pressure of air-introduced machine towards bag dust collector 6,
And during advancing in flue system 1, the active carbon particle receptor 1 activity charcoal stored in active carbon stocking system 4 sprays
The effect injection of system 5 is in flue system 1, so that active carbon particle enters bag dust collector 6 in company with polluted gas together,
Active carbon particle sufficiently adsorbs organic pollutant and metal pollutant in polluted gas during this, and it is sufficiently large to form volume
Machine pollutant, metal pollutant and active carbon assembly are stranded in bag dust collector 6, final purification treated tail gas warp
Air-introduced machine 9 is discharged.
The particular technique effect that step 1 is individually implemented has: 1. flue gases after preboiler radiates to 190 DEG C -240 DEG C, then
It imports spraying reaction tower 2 and carries out depickling, high temperature is effectively reduced for the service life of flue system 1 and spraying reaction tower 2
It influences；2. using lime white preparation system 3 in deacidification, synchronizes and prepare lime white as absorbent, compared to directly confession
Calcium hydroxide emulsion is answered, storage and transportation cost are effectively reduced；3. lime white absorbent is sprayed using atomization, so that it is guaranteed that cigarette
Gas comes into full contact with lime white absorbent, and then improves deacidification efficiency；4. the moisture content of absorbent droplet is evaporated using waste heat, from
And ensure the aridity of big quality byproduct, avoid the later period from needing to be carried out dehydrating byproduct.
The particular technique effect that step 2 is individually implemented has: the air pressure that 1. air-introduced machines 9 are not necessarily to undertake big quality byproduct pushes away
It send, so as to lower the operation power of air-introduced machine 9, and then reduces the operating cost of equipment；2. flue system 1 is without supplying
The conveying of big quality byproduct is answered, to reduce the hidden danger that flue system 1 blocks；3. reducing 6 institute of bag dust collector
The amount of substance that need to be filtered, to improve the filter efficiency of bag dust collector 6.
The particular technique effect that step 3 is individually implemented has: 1. by spurting into flue system 1 for active carbon particle,
To realize during flue gas enters bag dust collector 6 by spraying reaction tower 2, that is, start organic pollutant and metallic pollution
The adsorption cleaning of object, and then improve the efficiency of adsorption cleaning；2. active carbon and organic pollutant are in same in flue system 1
Step is advanced, and both processes are motion state, ensures that coming into full contact with for the two, and then improve the effect of adsorption cleaning
Fruit；3. entering the active carbon inside bag dust collector 6, be partially not yet adsorbed to saturation state, the weight of the amount of activated charcoal compared with
It is small, it will by the gas pressure of air-introduced machine 9, the filter bag surface of bag dust collector 6 to be fitted in, to form one in filter bag surface
Layer activated carbon adsorption layer, and then further organic pollutant and metal pollutant are adsorbed by activated carbon adsorption layer, it realizes
Second of the absorption to pollutant, while improving absorption purifying effect, effectively improves the utilization rate for active carbon.
Step 1: Step 2: there is generated technical effect after step 3 combines: the purification of 1. optimization flue gas of refuse burning
Processing path, i.e., first depickling are adsorbed afterwards, are refiltered, compared to technical solution provided by cited paper, after effectivelying prevent depickling
The problem of particulate pollutant of generation can not be collected effectively；2. without shorter with service life, and can not continuously transport
Capable activated carbon adsorber, herein it is to be appreciated that the absorbability of activated carbon adsorber is limited, when being absorbed into saturation state,
It needs to carry out desorption processing, whole equipment is unable to operate normally during being somebody's turn to do；3. by entire purified treatment optimization order simplify to
Three steps effectively increase purified treatment efficiency, reduce equipment operating cost.
The specific spray mode of lime white absorbent is that spraying reaction tower 2 sprays lime white preparation system using swivel nozzle
The absorbent of 3 preparation of system, so as to guarantee that, when slurry flow varies widely, the particle diameter distribution of atomized drop does not occur
It significantly changes, there is better adaptability to the flow of flue gas, temperature and composition transfer；The size droplet diameter of lime white absorbent
Less than 50 μm, so that the absorbent of equivalent has bigger range of scatter, to ensure coming into full contact with for absorbent and flue gas；Lime
It starches absorbent and is greater than 10s in the stay time in spraying reaction tower 2, so that it is guaranteed that acid contaminant is with absorbent when reacting
Between, and then ensure deacidification effect.
The specific structure of lime white preparation system 3 is as follows, and as shown in Figure 1 and Figure 2, lime white preparation system 3 includes the first storage
Feed bin 31, technique water tank 32, lime white make-up tank 33 and lime white storage tank 34 and lime white pump machine 35, the first storage bin 31
It is provided with the first air locking machine 36 between lime white make-up tank 33, is provided with work between technique water tank 32 and lime white make-up tank 33
Skill water pump 37；Lime white absorbent preparation step is as follows, and starting the first air locking machine 36 guidance lime white raw material enters lime white and matches
Slot 33 processed, starting technique water pump 37 drives process water to enter lime white make-up tank 33, after being sufficiently stirred by lime white make-up tank 33,
Lime white storage tank 34 is imported for use through manufactured lime white absorbent, and lime white storage tank 34 should be stirred uninterruptedly in storing process
Lime white absorbent；When it is desired to be used, lime white absorbent is extracted by lime white pump machine 35 and is supplied to spraying reaction tower 2.
It is had the following technical effect that using above-mentioned lime white absorbent preparation step, by the first air locking machine 36 by lime white
Process water is pumped into lime white make-up tank 33 to lime white make-up tank 33, by technique water pump 37 by feedstock transportation, thus by lime
It starches make-up tank 33 to stir, and then ensures the even concentration of lime white absorbent, simultaneously, it is only necessary to control the function of technique water pump 37
Rate, can be according to the concentration of the concentration adjustment lime white absorbent of acid contaminant in flue gas；Lime white quilt after completing preparation
It imported into lime white storage tank 34 for use, so that it is guaranteed that lime white preparation system 3 has sufficient lime white always is supplied to spray
Mist reaction tower 2, and then ensure the continuous operation of whole equipment；Lime white storage tank 34 should uninterruptedly stir lime in storing process
Absorbent is starched, to avoid leading to the actual concentrations for influencing lime white because of precipitating because of long-time storage.
It should be noted that the lime white raw material stored in the first storage bin 31 is calcium hydroxide powder, so as to avoid
Amount of heat is generated when preparing lime white, leads to that environment is contaminated and the rabbling mechanism of lime white make-up tank 33 is by heat waste
Bad problem.
The specific structure of active carbon stocking system 4 is as follows, and as shown in Figure 1, Figure 3, active carbon stocking system 4 includes active carbon
Storage bin 41, scale hooper 42, and the second air locking machine 43 being set between active carbon storage bin 41 and scale hooper 42；In activity
The specific supply process of charcoal is as follows, starting the second air locking machine 43 guidance active carbon enter in scale hooper 42, and by weighing after through by
Active carbon spraying system 5 sprays；Active carbon is sprayed by active carbon spraying system 5 again after being weighed by scale hooper 42, to realize
Control to active carbon spray volume.
The specific structure of active carbon spraying system 5 is as follows, as shown in Figure 1, active carbon spraying system 5 includes injection blower
51, the active carbon pipeline 52 of flue system 1, and the third being set between scale hooper 42 and active carbon pipeline 52 are connected
Air locking machine 53；The specific course of injection of active carbon is as follows, synchronous averaging third air locking machine 53 and injection blower 51, thus through weighing
Active carbon afterwards enters active carbon pipeline 52 and by the gas pressure of injection blower 51, is injected into flue gas through active carbon pipeline 52
Pipe-line system 1；It individually adds injection blower 51 to be used to push active carbon, effectively prevent the conveying because needing to increase active carbon, and
The problem of causing the operating load of air-introduced machine 9 to increase.
It is found in practice, when acid contaminant concentration is excessive in flue gas, may result in contained acid in tail gas
The exceeded problem of contact scar object occurs, thus as Figure 1 and Figure 4, gas cleaning processing complexes further include supplement depickling
System 10, supplement deacidification system 10 includes third storage bin 101, screw conveyor 102, supplement pipeline 103, and is set to benefit
Fill the 4th air locking machine 104 between pipeline 103 and screw conveyor 102, supplement 103 both ends of pipeline respectively with flue system
1 is connected to injection blower 51；Steps are as follows for supplement depickling: when detecting in discharged tail gas that acid contaminant is greater than discharge mark
On time, the supplement depickling matter that synchronous averaging screw conveyor 102 and the 4th air locking machine 104 will be stored in third storage bin 101
Supplement pipeline 103 is imported, and enters flue system 1 via the gas pressure of injection blower 51, thus in flue system
The supplement depickling of polluted gas is completed in system 1；Depickling matter is supplemented by injection, thus further taking off when realizing case of emergency
Acid, and then ensure that the acid contaminant content of institute's emission meets regulated discharge standard, reach and adapts to high concentrated acid contact scar
The technical effect of object flue gas.
It should be noted that the supplement depickling matter stored in third storage bin 101 is sodium bicarbonate dry powder, deacidification is supplemented
Acid contaminant is removed using the chemical absorbing principle of acid-base reaction, specific chemical principle is as follows:
SO2+ NaHCO3→NaSO3+H2O
HCl+ NaHCO3→NaCL2+H2O
HF+ NaHCO3→NaF2+H2O
NaSO3+1/2O2→NaSO4
Using sodium bicarbonate dry powder NaHCO3As supplement depickling matter, on the one hand since the activity of sodium bicarbonate is higher than the work of calcium hydroxide
Property, so that efficiency when supplement depickling is improved, on the other hand since the weight of sodium salt is lighter than the weight of calcium salt, so that it is guaranteed that depickling
The byproduct of generation can be driven by air pressure enters bag dust collector 6.
In the present invention, Fig. 1 is returned to, byproduct transportation system 7 is scrapper conveyor, and conveying section connects spraying reaction tower 2 simultaneously
With bag dust collector 6, delivery terminal connects byproduct storage warehouse 8, and the 5th air locking machine 71, filter is arranged in 2 bottom end of spraying reaction tower
6 bottom end of bag dust collector setting opening and closing valve 72, so that byproduct transportation system 7 can simultaneously generate spraying reaction tower 2
The flying dust that byproduct and the filtering of bag dust collector 6 generate is collected and transports, so improve equipment for byproduct and
The collection efficiency of flying dust.
Specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
It can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as in this hair
All by the protection of Patent Law in bright scope of the claims.
Claims (9)
1. a kind of flue gas of refuse burning high-efficient purification processing method, it is characterised in that: it includes: cigarette that gas cleaning, which handles complexes,
Feed channel system (1), spraying reaction tower (2), lime white preparation system (3), active carbon stocking system (4), active carbon injection system
System (5), bag dust collector (6), byproduct transportation system (7), byproduct storage warehouse (8) and air-introduced machine (9)；
It the treating method comprises following steps:
Step 1: so that the flue gas that waste heat boiler comes out about 190 DEG C -240 DEG C is entered by spraying through flue system (1) by top
Reaction tower (2) is prepared lime white as absorbent by lime white preparation system (3) at the same time, is sprayed into and sprayed with fine mist shape
At the top of mist reaction tower (2), comes into full contact with the absorbent droplet with very high surface area with flue gas, strong chemical reaction occurs
And heat exchange, the acid contaminant in flue gas is absorbed, while absorbent droplet is evaporated by the waste heat in flue gas；
Step 2: the big quality byproduct that can not be driven by air-introduced machine (9) gas pressure generated after step 1 depickling, by spraying
Mist reaction tower (2) bottom drops out and is delivered in byproduct storage warehouse (8) by byproduct transportation system (7) and stored；
Step 3: the polluted gas after step 1 depickling is driven by air-introduced machine (9) gas pressure towards bag dust collector (6),
And during advancing in flue system (1), the active carbon particle receptor 1 activity charcoal of storage in active carbon stocking system (4)
Spraying system (5) effect injection is in flue system (1), so that active carbon particle enters filter bag in company with polluted gas together
Deduster (6), active carbon particle sufficiently adsorbs organic pollutant and metal pollutant in polluted gas during this, forms body
Product sufficiently large machine pollutant, metal pollutant and active carbon assembly are stranded in bag dust collector (6), at final purification
Tail gas after reason is discharged through air-introduced machine (9).
2. flue gas of refuse burning high-efficient purification processing method according to claim 1, it is characterised in that: the spray reaction
Tower (2) using swivel nozzle spray lime white preparation system (3) preparation absorbent, the size droplet diameter of absorbent less than 50 μm,
It is greater than 10s in the stay time in spraying reaction tower (2).
3. flue gas of refuse burning high-efficient purification processing method according to claim 1, it is characterised in that: the lime white system
Standby system (3) include the first storage bin (31), technique water tank (32), lime white make-up tank (33) and lime white storage tank (34) with
And lime white pump machine (35), the first air locking machine is provided between first storage bin (31) and lime white make-up tank (33)
(36), technique water pump (37) are provided between the technique water tank (32) and lime white make-up tank (33)；
The lime white absorbent preparation step is as follows: starting the first air locking machine (36) guidance lime white raw material enters lime white and matches
Slot (33) processed, starting technique water pump (37) driving process water enter lime white make-up tank (33), are filled by lime white make-up tank (33)
After dividing stirring, lime white storage tank (34) are imported for use through manufactured lime white absorbent, lime white storage tank (34) is in storing process
In should uninterruptedly stir lime white absorbent；When it is desired to be used, lime white absorbent is extracted by lime white pump machine (35) and supply
Spraying reaction tower (2) should be given.
4. flue gas of refuse burning high-efficient purification processing method according to claim 3, it is characterised in that: first storing
The lime white raw material stored in storehouse (31) is calcium hydroxide powder.
5. flue gas of refuse burning high-efficient purification processing method according to claim 1, it is characterised in that: the active carbon storage
Deposit system (4) includes active carbon storage bin (41), scale hooper (42), and is set to active carbon storage bin (41) and scale hooper
(42) the second air locking machine (43) between；
In active carbon supply process, starting the second air locking machine (43) guidance active carbon enters in scale hooper (42), and by claiming
Through being sprayed by active carbon spraying system (5) after weight.
6. flue gas of refuse burning high-efficient purification processing method according to claim 5, it is characterised in that: the active carbon spray
It penetrates system (5) to include injection blower (51), connect the active carbon pipeline (52) of flue system (1), and is set to weighing
The third air locking machine (53) to struggle against (42) between active carbon pipeline (52)；
During spraying active carbon, synchronous averaging third air locking machine (53) and injection blower (51), thus the work after weighing
Property charcoal enter active carbon pipeline (52) and by injection blower (51) gas pressure, be injected into flue gas through active carbon pipeline (52)
Pipe-line system (1).
7. flue gas of refuse burning high-efficient purification processing method according to claim 6, it is characterised in that: the gas cleaning
Processing complexes further include supplement deacidification system (10), and the supplement deacidification system (10) includes third storage bin (101), spiral shell
Conveyer (102), supplement pipeline (103) are revolved, and the be set between supplement pipeline (103) and screw conveyor (102)
Four air locking machines (104), supplement pipeline (103) both ends are connected to flue system (1) and injection blower (51) respectively；
Steps are as follows for supplement depickling: when detecting that acid contaminant is greater than discharge standard in discharged tail gas, synchronous averaging
Screw conveyor (102) and the 4th air locking machine (104) will be stored in the supplement depickling matter in third storage bin (101) and import supplement
Pipeline (103), and enter flue system (1) via the gas pressure of injection blower (51), thus in flue system
(1) the supplement depickling of polluted gas is completed in.
8. flue gas of refuse burning high-efficient purification processing method according to claim 7, it is characterised in that: the third storing
The supplement depickling matter stored in storehouse (101) is sodium bicarbonate dry powder.
9. flue gas of refuse burning high-efficient purification processing method according to claim 1, it is characterised in that: the byproduct is defeated
Sending system (7) is scrapper conveyor, and conveying section connects spraying reaction tower (2) and bag dust collector (6), delivery terminal connection simultaneously
The 5th air locking machine (71), bag dust collector (6) bottom end is arranged in byproduct storage warehouse (8), spraying reaction tower (2) bottom end
Setting opening and closing valve (72).
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Application publication date: 20190625 |