CN206881437U - A kind of MDF dries tail gas biochemical treatment system - Google Patents
A kind of MDF dries tail gas biochemical treatment system Download PDFInfo
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Abstract
A kind of MDF dries tail gas biochemical treatment system, including drying cyclone dust collectors, spray-chilling pipeline, the spray column being sequentially connected with；Spray-chilling pipeline side wall is provided with first order spray head；Spray column includes the cooling of spray column active whirlwind, alkaline water spraying zone, spray column water film dedusting area and the spray column aqueous vapor rotating separation area sequentially arranged from top to bottom, and this biochemical treatment system can reduce vent gas treatment cost, while save Wood-based Panel Production cost；Dedusting separating effect is more preferable；Without whole production system is shut down during deslagging, and without manually cleaning, the clean water body separated with exhaust emissions, can also reduce the cost of water body storage；It is obvious to mitigate " Bai Long " phenomenon.
Description
Technical field
It the utility model is related to wood-based plate manufacture vent gas treatment field, more particularly to a kind of Midst density beaver board
(MDF) modified technique and processing system of tail gas biochemical processing method are dried.
Background technology
Present artificial board product line substantially belongs to self-discharging to exhaust emissions, and tail gas composition is not controlled.Although
Also there is the tail gas baffle-box for continuous press, but baffle-box mainly passes through bottom baffles, reduces wind speed, deposits dust.
Although this baffle-box can deposit the dust of some larger particles, the especially substantial amounts of minute dusts of most dust
Particle contains somebody still with exhaust emissions, and baffle-box can not be handled other materials in tail gas especially in tail gas
The formaldehyde and foul smell of the higher concentration given off in plate production process are made, can not be handled completely.And artificial board product line except
The flue gas of continuous press needs to handle outer, also has some other tail gas, such as the tail gas that the drying whirlwind of fiber drying pipe is discharged, with
And the tail gas of the discharge such as glue department, formaldehyde workshop.Therefore the exhaust emissions of present artificial board product line still has dust-laden
Amount is high, and temperature is high, the high situation of content of formaldehyde, has destruction to environment, is unfavorable for environmental protection.
This department granted patent《A kind of tail gas biochemical processing method and system》201410265262.0 disclose a kind of tail
Gas disposal method and production system, can greatly solve to deposit in above-mentioned MDF (i.e. medium density fibre board (MDF)) exhaust emissions in industry
The problem of, but found during Commissioning Practice, the body refuse and water that multi-stage spray dedusting is isolated are mixed in together, lodge in
Device bottom, timely separating treatment can not be carried out, it has to often run 3~6 months and shut down, empty and all sprayed in spray pipeline
Water, artificial cleaning condenses in the body refuse of device bottom, so as to cause problems with：
1st, because the water body storage in whole spray pipeline is larger, the shower water of discharge is possible excessive and triggers environment thing
Therefore --- it need to increase and build large-scale tank；
2nd, downtime, outage rate can be caused to rise the increase with labour cost；
3rd, crust block can not be separated and discharged with water body in time, and water body not enough cleans, easy plug nozzle and moisture film filler, be increased
Add fault rate and change filler cost, also increase producing cost；
4th, water body not enough cleans, and can cause water by fermentation, smelly and cause that VOC's is exceeded；
5th, water body not enough cleans, and can cause the increase of dust content in tail gas after handling.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of MDF and dries tail gas biochemical treatment system, at this
Reason system in time can collect above-mentioned body refuse and water, separation on the premise of the normal subbranch of processing system, and in water body
Dust-filtering, deslagging, maintain water body more clean, it is ensured that the lower content of system circulation pigment dirt, anti-locking system reclaimed water pump, spray
The blocking probability of head, valve, water mist dust-removing packing material etc., improve the stable operation level of whole system, reduce maintenance work
Amount.
The utility model processing system is configured based on following process areas：
(1) cyclone dust removal technique (apolegamy)；
(2) high speed and high pressure spray-chilling and suction aldehyde process area, or, tapered pipeline high speed and high pressure atomizing spray is cold
But with inhale aldehyde region technique；
(3) aqueous vapor separation crust block process area, is divided into gravitational settling crust block process area and aqueous vapor rotating separation crust block work
Two kinds of skill region；
(4) low speed flue gas water film dedusting and suction aldehyde region；
(5) duct type ionization dedusting, deodorization process (apolegamy)；
(6) cooling of active whirlwind, alkaline water atomizing spray process area, or, alkaline water spray process region (apolegamy)；
(7) Water warfare deslagging process.
A kind of MDF dries tail gas biochemical treatment system, including drying cyclone dust collectors, the spray-chilling being sequentially connected with
Pipeline, spray column；
Spray-chilling pipeline side wall is provided with first order spray head；Carried on spray-chilling pipeline or without
There is one or more snippets venturi reducing dedusting spray piping connected, if venturi reducing dedusting spray piping is carried, along tail
Gas direct of travel, venturi reducing dedusting spray piping caliber are gradually reduced；
Spray column includes the cooling of spray column active whirlwind, the alkaline water spraying zone sequentially arranged from top to bottom, spray column water
Film dedusting area and spray column aqueous vapor rotating separation area, wherein：
The cooling of spray column active whirlwind, alkaline water spraying zone side wall are provided with axial flow blower, the air draft direction of axial flow blower
It is upward along spray tower side wall beveling, cyclone type ascending air, the cooling of spray column active whirlwind, alkaline water spraying zone top can be formed
Portion is provided with fourth stage spray head and level V spray head；
Second level spray head is provided with the top of spray column water film dedusting area；
The storage area in spray column aqueous vapor rotating separation area including outer ring and the crust block area at place of bottom centre, crust block area bottom and
Automatic scraping slag filter is connected, and the water purification outlet of automatic scraping slag filter is connected with storage area；
Storage area passes through first order spray pipeline, second level spray pipeline, fourth stage spray pipeline and level V shower
Road connects first order spray head, second level spray head, fourth stage spray head and level V spray head respectively；
Spray-chilling pipeline output end tangentially connects spray column aqueous vapor rotating separation area top inner wall, atomizing spray
The sensor set in cooling line output end controls axial flow blower by control system, adjusts the air quantity and wind of axial flow blower
Pressure.
Wherein, cyclone dust collectors are dried and corresponds to cyclone dust removal process area (one-level or two level), venturi reducing dedusting
Spray piping corresponds to tapered pipeline high speed and high pressure spray-chilling and inhales aldehyde region technique；Spray column is right successively from bottom to up
It should be aqueous vapor rotating separation crust block process area, low speed flue gas water film dedusting and suction aldehyde process area, the cooling of active whirlwind, alkalescence
Water atomization spray process region, automatic scraping slag filter correspond to Water warfare deslagging process region.
Further, the spray column aqueous vapor rotating separation area inner chamber from top to bottom diametrically gradually increases round platform or in
The maximum shuttle platform shape of portion's diameter, it is easy to water, the rotation of cyclone rises and separation.
Further, crust block area bottom is connected by sludge pump with automatic scraping slag filter, and sludge pump is at interval of setting
Section of fixing time operates setting time value, will need not entirely be produced so that crust block and water body are discharged and separated in time, during deslagging and be
System is shut down, and without manually cleaning.
Further, the axial flow blower is radially provided with more circumferentially arranged with multi-turn in alkaline water spraying zone side wall
Row, one group is arranged as into rectangular per several axial flow blowers, multigroup axial flow blower configuration is in alkaline water spraying zone side wall；Or
Person, multiple evenly spaced configurations of axial flow blower are in alkaline water spraying zone side wall, with according to different tail gas discharge capacities, it is ensured that foot
Enough spinning updrafts.
Further, two sections of venturi reducing dedusting spray pipings, two sections of texts are carried on the spray-chilling pipeline
Connected in mound between reducing dedusting spray piping by isometrical spray piping.Tail gas is set to gather at the tapered place of caliber in pipeline center
By pipeline, the dust granules, the fibrous caking that are carried in tail gas are then spread apart at caliber urgency expansion to tube wall, with being arranged on tube wall
On atomizing spray aqueous vapor be sufficiently mixed, water-setting sedimentation, improve spraying and dedusting efficiency, particulate matter is mixed more with shower water
Fully, it is tapered twice it is anxious expand, can further improve particulate matter mixed with shower water, the effect of particulate matter and tail gas separation.
Further, the venturi reducing dedusting spray piping is Taper Pipe, and taper is 7~20 ° between big small end, text
Ratio 0.8~1.5 between the radical length of reducing dedusting spray piping and isometrical spray piping in mound.
Further, the dry cyclone dust collectors are that single-stage dries cyclone dust collectors or the two-stage of series connection dries whirlwind
Deduster.According to tail gas discharge capacity and vent gas treatment needs, secondary cyclone dedusting can be carried out, 40~80% fibre in tail gas
Dimension particulate matter is removed, and is transmitted back to artificial board product line and is comprehensively utilized；Follow-up spray system can also be mitigated to greatest extent simultaneously
The pressure of system dedusting, the treating capacity of fibre dust in water is reduced to greatest extent.
Further, the axial flow blower air quantity is 50000~70000m3/ h, blast are 300~400Pa.To ensure foot
Enough spinning updrafts, while clean water body can be taken away discharge.
Further, the first order spray pipeline is provided with formaldehyde catching agent preparation vessel to remove the formaldehyde in tail gas；
Fourth stage spray pipeline is provided with alkali lye preparation tank with middle conjunction nitric acid.
The beneficial effects of the utility model are：
1st, multilevel cyclone dust collection can remove the fiber grain thing of more than 80% in tail gas, be transported to production line progress
Comprehensive utilization, vent gas treatment cost is reduced, while save Wood-based Panel Production cost；
2nd, the dust that tapered pipeline high speed and high pressure spray-chilling and suction aldehyde can make to carry in tail gas spreads to tube wall,
Preferably the shower water of the spray head injection with being set on tube wall fuses, and dedusting separating effect is more preferable；
3rd, crust block and water body can discharges and separated in time by aqueous vapor separation crust block, need not be by whole production system during deslagging
Shut down, and without manually cleaning, the clean water body separated can also reduce water body storage with exhaust emissions
Cost；
4th, Water warfare slagging-off separates aqueous vapor stratification containing water slurry, the circulating filtration collected in crust block technique, water
Dust-filtering, deslagging in body, maintain water body more clean, it is ensured that the dust lower content in system circulation water, anti-locking system
The blocking probability of middle water pump, shower nozzle, valve, water mist dust-removing packing material etc., improve the stable operation level of whole system, reduce
Maintenance workload；
5th, the cooling of active whirlwind, alkaline water atomizing spray technique or alkaline Water spray, it is existing not only substantially to mitigate " Bai Long "
As also taking away corresponding vapour quantity because mending air quantity, preventing that " production waste water " can not be located caused by 20~30 tons of condensed waters per hour
Manage and have to increase huge investment to build Sewage Disposal.
6th, dust and content of formaldehyde in can further reducing tail gas on the basis of existing place's system, improve tail gas row
Put index.
Brief description of the drawings
Fig. 1 is a kind of structural representation of optimum decision system of the utility model
In Fig. 1：1 is dries cyclone dust collectors, and 2 be tapered pipeline spray-chilling pipeline, and 201 be that venturi reducing removes
Dirt spray piping, 202 be isometrical spray piping；3 be spray column, and 302 be first order spray pipeline, and 303 be that spray column aqueous vapor is revolved
Turn Disengagement zone, 305 be the cooling of spray column active whirlwind, alkaline water spraying zone, and 306 be spray column water film dedusting area, and 4 catch for formaldehyde
Agent preparation vessel is caught, 6 be alkali lye preparation tank, and 8 be axial flow blower, and 10 be automatic scraping slag filter, and 11 be sludge pump.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
What the tail gas or the wet process of press flue gas discharged for the drying whirlwind of fiber drying pipe in Wood-based Panel Production were discharged
Tail gas, for environmental requirement, it is necessary to reduce dust and content of formaldehyde, the utility model proposes a kind of MDF to dry tail gas life
Change processing system, the dust and content of formaldehyde that the system can not only be on the basis of existing process in further reduction tail gas；
And the shower water after being purified during vent gas treatment can be carried away by exhaust emissions in time in time, it is not only obvious to mitigate
" Bai Long " phenomenon, moreover it is possible to prevent that " production waste water " can not handle and have to increase caused by 20~30 tons of condensed waters per hour
Sewage Disposal is built in huge investment；And crust block and water body can be discharged and separated in time, without will be whole during deslagging
Production system is shut down, without manually cleaning.
Concrete technology flow process combination processing system is segmented into following process area：(1) cyclone dust removal technique (choosing
With)；(2) high speed and high pressure spray-chilling and inhale aldehyde process area, or, tapered pipeline high speed and high pressure spray-chilling and
Inhale aldehyde region technique；(3) aqueous vapor separation crust block process area, is divided into gravitational settling crust block process area and aqueous vapor rotating separation coagulates
Two kinds of slag process area；(4) low speed flue gas water film dedusting and suction aldehyde region；(5) duct type ionization dedusting, deodorization process (choosing
With)；(6) cooling of active whirlwind, alkaline water atomizing spray process area, or, alkaline water spray process region (apolegamy)；(7)
Water warfare deslagging process.
The concrete technology in corresponding each area requires as follows：
(1), two level cyclone dust removal technique (apolegamy)
The purpose of technique in the area is the tail gas for drying whirlwind discharge：
A, second of cyclone dust removal is carried out, the fiber grain thing of 40~80% in tail gas is removed, is transmitted back to wood-based plate
Production line is comprehensively utilized；
B, mitigate the pressure of follow-up spray system dedusting to greatest extent, reduce the processing of fibre dust in water to greatest extent
Amount.
(2) high speed and high pressure spray-chilling and suction aldehyde process area, or, tapered pipeline high speed and high pressure atomizing spray is cold
But with inhale aldehyde region technique；
The purpose of technique in the area is the tail gas for drying whirlwind discharge：
A, implement to expand caliber, be cooled fast in certain temperature range, it is therefore an objective to reduce the exhaust gas volumes of discharge, slow down
Tail gas wind speed and blast and：
1) drying air fan windage is reduced, reduces drying air fan energy consumption, reduces production cost；
2) formaldehyde absorption ratio is improved；
3) larger dust is settled to improve the preliminary cleaning effect of dust granules and be humidified and improved then to dust surface
Moisture film, water mist dust-removing effect；
B, the formaldehyde in initial absorption and tail gas is implemented；
C, water-setting sedimentation is implemented to the dust granules in tail gas, cleans tail gas；
D, shower water initial absorption, reduction odor concentration (VOC) are passed through；
E, appropriate formaldehyde catching agent is added in shower water, neutralizes the formaldehyde in tail gas.
Wherein, tapered pipeline high speed and high pressure spray-chilling and aldehyde region technique is inhaled by tail gas by first tapered caliber,
Wind speed, then anxious expander footpath are improved, a large amount of dust of patch inner-walls of duct operation is rolled onto the anxious nozzle for expanding position with venturi principle
Preceding implementation spraying and dedusting, by so one or more levels series connection venturi reducing dedusting spray piping, make tail gas in caliber gradually
Gather at contracting in pipeline centrally through pipeline, the dust granules that are carried in tail gas, fibrous caking are then at caliber urgency expansion to tube wall
Spread apart, be sufficiently mixed with the atomizing spray aqueous vapor being arranged on tube wall, water-setting sedimentation, improve spraying and dedusting efficiency, make particle
Thing mixes more abundant with shower water.
(3) aqueous vapor separation crust block process area
By high speed and high pressure spray-chilling and aldehyde process area is inhaled, or, tapered pipeline high speed and high pressure atomizing spray is cold
But with inhale the tail gas after the technique spraying cooling of aldehyde region：
A, the tail gas after preliminary cooling, spray filtering separates with dust granules, the fibrous caking carried in water and water；
B, the dust granules after water-setting, fibrous caking condense into mud, and water declines, rests on reserved area, tail together
Gas quickly through and ascend into lower road PROCESS FOR TREATMENT；By the mud of reserved area and the regular pump drainage of water, carry out Water warfare slagging-off
Technique, the water after processing recycle in each operation；
Wherein, gravitational settling crust block process area is that air-water mixture is passed through into one section of first anxious heavy U type crust block to rise suddenly again
Separate pipeline implements dust, particle sedimentation, and tail gas is quickly through dust granules, fibrous caking after water and water-setting rest on solidifying
Slag separate pipeline bottom, the mixture of water and mud is formed, and instant or interruption discharge contains water slurry；
Aqueous vapor rotating separation crust block technique is to make air-water mixture tangentially into disengagement chamber pool inner wall, in disengagement chamber
Form water, cyclone, the current of rotation make the dust granules after water-setting, fibrous caking condense into mud and deposit in disengagement chamber pool bottom
The center in portion, immediately or interruption discharge contains water slurry；It is layered and returns to each use after the clean water body filtration of mud outer ring
Recycled in water conservancy project sequence, tail gas is lifted off disengagement chamber and enters lower road PROCESS FOR TREATMENT.
(4) low speed flue gas water film dedusting and suction aldehyde region；
The purpose of technique in the area is the tail gas aqueous vapor separation crust block process area discharge：
A, double to slow down tail gas wind speed and blast by doubling to expand exhaust gas flow passage；
B, exhaust temperature is further reduced by shower water to reduce tail gas wind speed and blast, water smoke is improved and removes
Dirt effect and a large amount of formaldehyde absorbed in tail gas；
C, water mist dust-removing is implemented to the dust in tail gas, substantially the overwhelming majority (70~80%) dust mistake in tail gas
It is filtered dry net；
D, shower water dissolving is implemented to the formaldehyde in tail gas, it is substantially that major part (75~90%) formaldehyde in tail gas is molten
Solve；
E, further absorbed by shower water, reduce odor concentration (VOC)
F, shower water is implemented to rinse to water film dedusting packing material, prevents packing material from blocking and causing：
1) wind speed is accelerated and makes water film dedusting and inhale the decline of aldehyde effect；
2) packing material area reduces and causes water film dedusting and inhale the decline of aldehyde effect；
G, whole cooling, dedusting, the shower water for inhaling aldehyde spray column are collected, to send Water warfare area back to；
H, the moisture in condensing tail gas in summer, evaporation amount of moisture is reduced, reclaims the moisture in tail gas, reduces system water supplement
Amount, reduce production cost.
The shower water of the process area can be the clean water body after the processing of Water warfare deslagging process, can also match
Certain alkaline matter is added in clean water body, becomes alkalescent water, alkaline Water spray is advantageous in that：First, can
More preferable deodorization, it as the plank of the main raw material(s) of medium density fibre board (MDF) (abbreviation MDF) is subacidity organic matter that this, which is due to,
Using alkalescent water as shower water, the amount of fermentation of organic matter can be effectively reduced, so as to play a part of deodorization；Second, alkalescence
Water can also catch the dust in tail gas, so as to obtain more preferable dust removing effects.
(5) duct type ionization dedusting, deodorization process region (apolegamy)
Duct type ionization dedusting, deodorization process are that the clean water after the processing of Water warfare deslagging process is utilized in pipeline
Body carries out ionizing dedusting and spray to tail gas.
Duct type ionizes dedusting, deodorization process not only small volume, and equipment cost is low, while can also be according to scene apolegamy
Equipment, ionization dedusting, deodorization pipeline are separated to the disengagement chamber/crust block separate pipeline or low speed flue gas water of crust block technique with aqueous vapor
Film dedusting and suction aldehyde process area separate independently of each other, distance increase between the two, into ionization dedusting, the water of deodorization pipeline
Vapour content is relatively small, so as to which exhaust gas volumes are relatively reduced, it is possible to increase ionization dedusting, the efficiency of deodorization.
The shower water of the process area can be the clean water body after the processing of Water warfare deslagging process, can also match
Certain alkaline matter is added in clean water body, becomes alkalescent water, alkaline Water spray is advantageous in that：First, can
More preferable deodorization；Second, alkaline water can also catch the dust in tail gas, so as to obtain more preferable dust removing effects.
(6) cooling of active whirlwind, alkaline water atomizing spray process area, or, alkaline water spray process region (apolegamy)
The cooling of active whirlwind, alkaline water atomizing spray process area are to the tail after water film dedusting or ionization dedusting, deodorization
Gas：
A, control system is implemented by the signal of sensor feedback according to tail gas discharge capacity VFC strong blast volume axial-flow fan
Rotation driving, tail gas cyclone type is increased, form whirlwind tower working method：
1) wind oxygenation is mended, the nitric oxide in tail gas and oxygen reaction are generated nitrogen dioxide, vaporific alkaline Water spray
Water, which dissolves in nitrogen dioxide, forms nitric acid in water, then is neutralized by shower water neutral and alkali material into salt and water；
2) the condensation vapor with microparticle in tail gas into big water droplet, decline, crust block, slagging-off；
3) a certain degree of turbulent fluctuation laminar flow is formed in this region, the mixed proportion of tail gas and water is further improved, makes as far as possible
Water smoke is sufficiently mixed with tail gas, on the one hand cooling, on the one hand raising efficiency of dust collection；
B, implement at least one-level to spray, this region is full of water smoke, adhere to fine solid particle using water smoke for the last time；
C, wind cooling is mended, in winter, exhaust temperature is further decreased to close to environment temperature by shower water and benefit wind,
The mist state (i.e. current winter common " Bai Long " phenomenon) of discharge tail gas is greatly lowered；
D, return and evaporate absorption formaldehyde, be reduced to the formaldehyde in tail gas minimum, it is ensured that to realize qualified discharge；
E, absorb again, reduce odor concentration (VOC)；
F, mend wind and take away steam, the part condensation and after the slagging-off of (7) Water warfare deslagging process area filter is clean
Water body and the clean water body of aqueous vapor rotating separation crust block technique layering, 3~6 times of air quantity supplemented by axial flow blower discharge band
Walk, avoid the investment of great number water treatment facilities.
Alkaline water spray process region is to the tail gas after water film dedusting or ionization dedusting, deodorization：
A, nitrogen dioxide is dissolved in water by the nitric oxide in tail gas and oxygen reaction generation nitrogen dioxide, vaporific shower water
Middle formation nitric acid, then neutralized by shower water neutral and alkali material into salt and water；
B, the condensation vapor with microparticle in tail gas into big water droplet, decline, crust block, slagging-off；
C, implement spray, this region is full of water smoke, adhere to fine solid particle using water smoke for the last time；
D, spraying cooling, in winter, exhaust temperature is further decreased to close to environment temperature, discharge tail is greatly lowered
The mist state (i.e. current winter common " Bai Long " phenomenon) of gas；
E, return and evaporate absorption formaldehyde, be reduced to the formaldehyde in tail gas minimum, it is ensured that to realize qualified discharge；
F, tail gas takes away part spray steam, the part condensation and after the Water warfare deslagging process filter cleaner
Clean water body and the clean water body of aqueous vapor rotating separation crust block technique layering, are taken away by exhaust emissions, reduce great number water process
The investment of equipment.
The alkaline water of the process area is the clean water body and He Shui after the Water warfare deslagging process filter cleaner
The clean water body of gas rotating separation crust block technique layering adds basic formulations and is prepared.
(7) Water warfare deslagging process region
The Water warfare deslagging process is that the separation crust block process area discharge of (3) aqueous vapor is contained into water slurry:
A, stratification, settle deslagging and discharge in time, the clean water body obtained after processing returns each with water conservancy project sequence
Recycle；
B, clean water body is implemented circulating filtration, the dust-filtering in water body, deslagging, maintains water body more clean, really
The blocking of the lower content of insurance system recirculated water dust, anti-locking system reclaimed water pump, shower nozzle, valve, water mist dust-removing packing material etc.
Probability, improve the stable operation level of whole system, reduce maintenance workload；
C, the water after handling can send water circulation cooling zone (option device, being determined the need for according to when ground temperature) implementation back to
Cool, realize the auxiliary control of stable water temperature.
As shown in figure 1, in the embodiment, the two-stage that MDF dries tail gas biochemical treatment system and includes being sequentially connected with dries rotation
Wind deduster 1, spray-chilling pipeline 2, spray column 3.
The side wall of spray-chilling pipeline 2 is provided with first order spray head；With two sections of strings on spray-chilling pipeline 2
The venturi reducing dedusting spray piping 201 of connection, pass through isometrical spray between two sections of venturi reducing dedusting spray pipings 201
Pipeline 202 connects；Venturi reducing dedusting spray piping 201 is Taper Pipe, along tail gas direct of travel, venturi reducing dedusting spray
The caliber of pipeline 201 is gradually reduced；Taper is 7~20 ° between the big small end of Taper Pipe, venturi reducing dedusting spray piping 201 and is waited
Ratio 0.8~1.5 between the radical length of footpath spray piping 202.
Spray column 3 includes the cooling of spray column active whirlwind, the alkaline water spraying zone 305 sequentially arranged from top to bottom, spray
Tower water film dedusting area 306 and spray column aqueous vapor rotating separation area 303, wherein：
The cooling of spray column active whirlwind, the side wall of alkaline water spraying zone 305 are provided with axial flow blower 8, and axial flow blower 8 is in alkalescence
Circumferentially arranged with multi-turn in the side wall of Water spray area 305, radially provided with multiple row, per several axial flow blowers 8 into rectangular arrangement
For one group, multigroup axial flow blower 8 is configured in the side wall of alkaline water spraying zone 305, is forming region turbulent layer, multigroup axial flow blower
Interval between 8 is not necessarily uniform, and the quantity of every group of axial flow blower 8 and arrangement are also not necessarily identical；Or multiple axial flow blowers
8 evenly spaced configurations are in the side wall of alkaline water spraying zone 305；The air quantity of axial flow blower 8 is 50000~70000m3/ h, blast are
300~400Pa, the air draft direction of axial flow blower 8 are chamfer upwards along the side wall of spray column 3, can form cyclone type ascending air,
The cooling of spray column active whirlwind, the top of alkaline water spraying zone 305 are provided with fourth stage spray head and level V spray head；
The output end of spray-chilling pipeline 2 tangentially connects the top inner wall of spray column aqueous vapor rotating separation area 303, atomization
The sensor set in the output end of spraying cooling pipeline 2 controls axial flow blower 8 by control system, adjusts the wind of axial flow blower 8
Amount and blast.
The top of spray column water film dedusting area 306 is provided with second level spray head；
The round platform or mid diameter that the inner chamber of spray column aqueous vapor rotating separation area 303 from top to bottom diametrically gradually increases are maximum
Shuttle platform shape, including the crust block area at the storage area of outer ring and bottom centre, crust block area bottom pass through sludge pump 11 and automatic scraping
Slag filter 10 is connected, and sludge pump 11 operates setting time value, the water purification of automatic scraping slag filter 10 at interval of setting time section
Outlet is connected with storage area；
Storage area is sprayed by first order spray pipeline 302, second level spray pipeline, fourth stage spray pipeline and level V
Pipeline connects first order spray head, second level spray head, fourth stage spray head and level V spray head respectively；First order shower
Road is provided with formaldehyde catching agent preparation vessel 4；Fourth stage spray pipeline is provided with alkali lye preparation tank 6.
The output end of spray-chilling pipeline 2 tangentially connects the top inner wall of spray column aqueous vapor rotating separation area 303, atomization
The sensor set in the output end of spraying cooling pipeline 2 controls axial flow blower 8 by control system, adjusts the wind of axial flow blower 8
Amount and blast.
Using the fourth stage, the level V shower water of mending wind blower fan and flow-controllable of air volume controlled, on the top of spray column 3
" cooling tower " function is formed, reduces or remits the cost of investment of independent cooling tower, i.e.,：Clean water spray flux is increased, increases and mends wind air quantity pair
Water body implements air cooling cooling.Clean water after not being carried away by the wind, air-cooled drops back into bottom of towe with gravity, automatically returns to system.Cause
It is tangential direction to mend wind direction, and the position forms whirlwind, so, water loss longer than common cooling tower cooler effective time
Amount is less.
The technical parameter of the processing system is as follows：
First, before processing dries tail gas parameter
1st, tail gas dustiness：120~380mg/Nm3
2nd, methanal as tail gas concentration：About 2.1mg/Nm3
3rd, exhaust temperature：About 60~75 DEG C
4th, vapour content：About 0.1~0.2kg/kg
5th, particle size：About 1~40 μm
2nd, tail gas parameter is dried after handling
1st, tail gas dustiness：<5mg/Nm3
2nd, methanal as tail gas concentration：<0.5mg/Nm3
3rd, exhaust temperature：About 40~60 DEG C
4th, vapour content：About 0.16~0.2kg/kg
5th, particle size：About 1~20 μm
3rd, other technical parameters
1st, installation total capacity：200~350KW
2nd, water is reclaimed from current drying system：3~5 ton hours (by yield and ambient temperature effect)
3rd, whole system rate of water make-up：0~5 ton day (by yield and ambient temperature effect)
4th, automatic scummer bed drain purge：0.25 cubic meter/hour
5th, slag moisture content (relative moisture content)：100%.
Claims (9)
1. a kind of MDF dries tail gas biochemical treatment system, it is characterised in that：Including be sequentially connected with drying cyclone dust collectors (1),
Spray-chilling pipeline (2), spray column (3)；
Spray-chilling pipeline (2) side wall is provided with first order spray head；Carried on spray-chilling pipeline (2) or not
Venturi reducing dedusting spray piping (201) with one or more snippets series connection, if carrying venturi reducing dedusting shower
Road (201), along tail gas direct of travel, venturi reducing dedusting spray piping (201) caliber is gradually reduced；
Spray column (3) includes the cooling of spray column active whirlwind, the alkaline water spraying zone (305) sequentially arranged from top to bottom, spray
Tower water film dedusting area (306) and spray column aqueous vapor rotating separation area (303), wherein：
The cooling of spray column active whirlwind, alkaline water spraying zone (305) side wall are provided with axial flow blower (8), the row of axial flow blower (8)
Wind direction is chamfer upwards along spray column (3) side wall, can form cyclone type ascending air, the cooling of spray column active whirlwind, alkalescence
Fourth stage spray head and level V spray head are provided with the top of Water spray area (305)；
Second level spray head is provided with the top of spray column water film dedusting area (306)；
Spray column aqueous vapor rotating separation area (303) includes the crust block area at the storage area and bottom centre of outer ring, crust block area bottom
It is connected with automatic scraping slag filter (10), the water purification outlet of automatic scraping slag filter (10) is connected with storage area；
Storage area passes through first order spray pipeline (302), second level spray pipeline, fourth stage spray pipeline and level V shower
Road connects first order spray head, second level spray head, fourth stage spray head and level V spray head respectively；
Spray-chilling pipeline (2) output end tangentially connects spray column aqueous vapor rotating separation area (303) top inner wall, atomization
The sensor set in spraying cooling pipeline (2) output end controls axial flow blower (8) by control system, adjusts axial flow blower
(8) air quantity and blast.
2. MDF according to claim 1 dries tail gas biochemical treatment system, it is characterised in that：The spray column aqueous vapor rotation
Turn round platform that Disengagement zone (303) inner chamber from top to bottom diametrically gradually increases or the maximum shuttle platform shape of mid diameter.
3. MDF according to claim 1 dries tail gas biochemical treatment system, it is characterised in that：Crust block area bottom passes through silt
Dredge pump (11) is connected with automatic scraping slag filter (10), and sludge pump (11) operates setting time value at interval of setting time section.
4. MDF according to claim 1 dries tail gas biochemical treatment system, it is characterised in that：The axial flow blower (8) exists
Circumferentially arranged with multi-turn in alkaline water spraying zone (305) side wall, radially provided with multiple row, per several axial flow blowers (8) into square
Battle array shape is arranged as one group, and multigroup axial flow blower (8) configuration is in alkaline water spraying zone (305) side wall；Or multiple axial flow blowers
(8) evenly spaced configuration is in alkaline water spraying zone (305) side wall.
5. MDF according to claim 1 dries tail gas biochemical treatment system, it is characterised in that：The spray-chilling
Two sections of venturi reducing dedusting spray pipings (201), two sections of venturi reducing dedusting spray pipings (201) are carried on pipeline (2)
Between pass through isometrical spray piping (202) connect.
6. MDF according to claim 5 dries tail gas biochemical treatment system, it is characterised in that：The venturi reducing removes
Dirt spray piping (201) is Taper Pipe, and taper is 7~20 ° between big small end, venturi reducing dedusting spray piping (201) and is waited
Ratio 0.8~1.5 between the radical length of footpath spray piping (202).
7. MDF according to claim 1 dries tail gas biochemical treatment system, it is characterised in that：The dry cyclone dust removal
Device (1) is that single-stage dries cyclone dust collectors (1) or the two-stage of series connection dries cyclone dust collectors (1).
8. MDF according to claim 1 dries tail gas biochemical treatment system, it is characterised in that：Axial flow blower (8) wind
Measure as 50000~70000m3/ h, blast are 300~400Pa.
9. MDF according to claim 1 dries tail gas biochemical treatment system, it is characterised in that：The first order shower
Road is provided with formaldehyde catching agent preparation vessel (4)；Fourth stage spray pipeline is provided with alkali lye preparation tank (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720751045.1U CN206881437U (en) | 2017-06-26 | 2017-06-26 | A kind of MDF dries tail gas biochemical treatment system |
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|---|---|---|---|
| CN201720751045.1U CN206881437U (en) | 2017-06-26 | 2017-06-26 | A kind of MDF dries tail gas biochemical treatment system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111282423A (en) * | 2020-03-05 | 2020-06-16 | 许翠英 | Desulfurization and denitrification treatment method for industrial pollution emission waste gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111282423A (en) * | 2020-03-05 | 2020-06-16 | 许翠英 | Desulfurization and denitrification treatment method for industrial pollution emission waste gas |
| CN111282423B (en) * | 2020-03-05 | 2020-11-10 | 上海汇舸环保科技有限公司 | Desulfurization and denitrification treatment method for industrial pollution emission waste gas |
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