CN107413149A - A kind of MDF dries the modified technique and processing system of tail gas biochemical processing method - Google Patents

Abstract

A kind of MDF dries the modified technique and processing system of tail gas biochemical processing method, comprises the following steps：The first step, high speed and high pressure spray-chilling and suction aldehyde；Second step, low speed flue gas water film dedusting and suction aldehyde；The first step, aqueous vapor separation crust block technique is set up between second step, aqueous vapor separation crust block technique includes gravitational settling crust block technique and aqueous vapor rotating separation crust block technique, aqueous vapor separation crust block technique can be in time by the mud of reserved area and the regular pump drainage of water, carry out Water warfare deslagging process, water after processing recycles in each operation, without whole production system is shut down during deslagging, and without manually cleaning, the clean water body separated can also be with exhaust emissions, reduce the cost of water body storage, and a large amount of clean water bodys can be taken away by exhaust emissions, mitigate " Bai Long " phenomenon, prevent " production waste water " caused by 20~30 tons of condensed waters per hour from can not handle and have to increase huge investment to build Sewage Disposal.

Description

A kind of MDF dries the modified technique and processing system of tail gas biochemical processing method

Technical field

The present invention relates to wood-based plate to manufacture vent gas treatment field, more particularly to a kind of Midst density beaver board (MDF) is done The modified technique and processing system of dry tail gas biochemical processing method.

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.

The content of the invention

The technical problems to be solved by the invention are to provide the modified technique that a kind of MDF dries tail gas biochemical processing method And its processing system, the modified technique and processing system can be on the premise of the normal subbranches of processing system, in time by above-mentioned mud Slag and water are collected, separation, and the dust-filtering in water body, deslagging, maintain water body more clean, it is ensured that system circulation pigment dirt Lower content, anti-locking system reclaimed water pump, shower nozzle, valve, water mist dust-removing packing material etc. blocking probability, improve whole system Stable operation it is horizontal, reduce maintenance workload.

The present invention is achieved by the following technical solutions：

A kind of MDF dries the modified technique of tail gas biochemical processing method, comprises the following steps：

The first step, high speed and high pressure spray-chilling and suction aldehyde；

Second step, low speed flue gas water film dedusting and suction aldehyde；

It is characterized in that：

Aqueous vapor separation crust block technique is set up between the first step, second step, by the tail gas after first step spraying cooling and water and Dust granules, the fibrous caking carried in water separates：Dust granules, fibrous caking after water-setting condense into mud, and water is together Decline, rest on reserved area, tail gas quickly through and ascend into lower road PROCESS FOR TREATMENT；The mud of reserved area and water are determined Phase pump drainage, Water warfare deslagging process is carried out, the water after processing recycles in each operation；

The aqueous vapor separation crust block technique is gravitational settling crust block technique, and air-water mixture is passed through into one section of U-shaped pipe reality Dust, particle sedimentation are applied, tail gas is quickly through dust granules, fibrous caking after water and water-setting rest on crust block separate pipeline Bottom, form the mixture of water and mud, and immediately or interruption discharge contains water slurry；

Or the aqueous vapor separation crust block technique is aqueous vapor rotating separation crust block technique, air-water mixture is tangentially entered Enter disengagement chamber pool inner wall, form water, cyclone in disengagement chamber, the current of rotation make the dust granules after water-setting, fibrous caking Condense into mud alluvial and contain water slurry in the center of disengagement chamber basin bottom, instant or interruption discharge；It is layered in mud Return after the clean water body filtration of outer ring and recycled in each sequence with water conservancy project, tail gas is lifted off disengagement chamber and entered at lower road technique Reason；

The Water warfare deslagging process is by the stratification containing water slurry of aqueous vapor separation crust block technique discharge, deslagging is sunk Drop and discharge in time, the clean water body obtained after processing returns to be recycled in each sequence with water conservancy project.

The purpose of technique of aqueous vapor separation crust block technique, is high speed and high pressure spray-chilling and inhales the tail gas after aldehyde cooling：

1st, the tail gas after preliminary cooling, spray filtering is separated from water；

2nd, by shower water in disengagement chamber quick rotational flow, dust, fibrous caking are condensed in disengagement chamber pool bottom Among portion, or, by gravitational settling of the shower water in the suddenly heavy crust block separate pipeline to rise suddenly, dust, fibrous caking are coagulated The lower in crust block separate pipeline is tied, filter cleaning is carried out so that sludge pump is periodically extracted into Water warfare deslagging process；According to big The separation situation of small different equipment reclaimed water and mud, additionally it is possible to the water in disengagement chamber pond is directly carried out Sprayer Circulation profit With so as to reduce the processing load of Water warfare deslagging process.

The technique purpose of Water warfare deslagging process is：

1st, aqueous vapor is separated stratification containing water slurry, the circulating filtration collected in crust block technique, the dust in water body Filtering, deslagging, maintain water body more clean, it is ensured that the dust lower content in system circulation water, 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；

2nd, 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 Return again in each sequence with water conservancy project and recycle after cooling, realize the auxiliary control of stable water temperature, or, the water after processing is straight Connect to return and recycled in each sequence with water conservancy project.

3rd, during water circulation use, part steam can vapor away with exhaust emissions, reduce water body storage and processing Burden.

Further, the second step low speed flue gas water film dedusting and inhale aldehyde technique after be additionally provided with duct type ionization dedusting, Deodorization process, tail gas is carried out using the clean water body after the processing of Water warfare deslagging process ionizing dedusting and spray in the duct Leaching.The technique can further reduce particle content in tail gas with the subacidity organic matter in dedusting and in tail gas, reduce It sends out alcohol amount with deodorization, and the cost of equipment in itself is higher, therefore can be matched as needed.The patent of this department earlier application Disclosed in tower ionization dust collecting process, be that ionization dedusting region is set in spray column middle and upper part, due to ionization dedusting region body Product is big, and equipment cost is high, also, ionizes and connect above and below dedusting area and the main suction aldehyde process area of low speed flue gas water film dedusting, low Fast flue gas water film dedusting and a large amount of spray water mists inhaled in aldehyde process area are easily carried up into ionization dedusting area, tail by tail gas Gas dilution can influence to ionize dedusting, the efficiency of deodorization；And duct type ionizes dedusting, deodorization process not only small volume, equipment cost It is low, while the separation of crust block technique can also be separated ionization dedusting, deodorization pipeline with aqueous vapor according to the equipment of scene apolegamy Chamber/crust block separate pipeline or low speed flue gas water film dedusting and suction aldehyde process area separate independently of each other, distance between the two Increase, the moisture content into ionization dedusting, deodorization pipeline is relatively small, so as to which exhaust gas volumes are relatively reduced, it is possible to increase electricity From the efficiency of dedusting, deodorization.

Further, it is contemplated that in the process disclosed in this department granted patent, cooling degree is inadequate before exhaust emissions, Although the emission compliance that dust granules are less than 50mg/ cubes is realized during discharge, but in the winter time, high-temperature tail gas can go out when discharging Existing " Bai Long " phenomenon, cause periphery civic to complain and report, and then cause the frequent detection of Environmental Protection Agency and manufacturer largely to connect Treat, explain work, therefore, can the second step low speed flue gas water film dedusting and inhale aldehyde technique after or it is described ionization remove The cooling of active whirlwind, alkaline water atomizing spray technique or alkaline water spray process are set up after dirt, deodorization process：

Wherein, the cooling of active whirlwind, alkaline water atomizing spray technique pass through the Wind Volume according to tail gas discharge capacity VFC Axial flow blower implements rotation driving to the tail gas after dedusting, tail gas cyclone type is increased, while carries out alkaline Water spray to tail gas, Described alkaline water for after the Water warfare deslagging process filter cleaner clean water body and with aqueous vapor rotating separation crust block The clean water body of technique layering adds basic formulations and is prepared, and the purpose of the technique is：

Wind oxygenation is mended, the nitric oxide in tail gas and oxygen reaction are generated nitrogen dioxide, vaporific shower water is dioxy Change nitrogen, which dissolves in, forms nitric acid in water, then is neutralized by shower water neutral and alkali material into salt and water；

The condensation vapor with microparticle in tail gas into big water droplet, decline, crust block, slagging-off；

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 water as far as possible Mist is sufficiently mixed with tail gas, on the one hand cooling, on the one hand raising efficiency of dust collection；

This region is full of water smoke by spray, adhere to fine solid particle using water smoke for the last time, further reduce tail gas In dust discharge amount, dust emission can be made to be down to less than 20mg/ cubes；

Wind cooling is mended, in winter, by shower water and wind is mended exhaust temperature is further decreased to close to environment temperature, greatly The mist state (i.e. current winter common " Bai Long " phenomenon) of amplitude reduction discharge tail gas；

Return and evaporate absorption formaldehyde, be reduced to the formaldehyde in tail gas minimum, it is ensured that to realize qualified discharge；

Absorb again, reduce odor concentration (VOC)；

Mend wind and take away steam, condensation and part cleaning water body after the Water warfare deslagging process filter cleaner and The clean water body of aqueous vapor rotating separation crust block technique layering, 3~6 times of air quantity discharge supplemented by axial flow blower are taken away, prevented Per hour " production waste water " caused by 20~30 tons of condensed waters (be actually cleaned clean water body) can not handle and must not Huge investment is not increased to build Sewage Disposal.

Using the clean shower water for mending wind blower fan and flow-controllable of air volume controlled, formed on the process area top " cold But tower " function, the cost of investment of independent cooling tower is reduced or remitted, i.e.,：Clean water spray flux is increased, increases and mends wind air quantity to water body implementation Air cooling cools.Clean water after not being carried away by the wind, air-cooled drops back into bottom of towe with gravity, automatically returns to system.And because mend Wind direction is tangential direction, and the position forms whirlwind, so, water loss amount longer than common cooling tower cooler effective time Less.

Shower water is segmented into two layers up and down, and wherein lower floor's clean water is alkaline water, above whirlwind area, for neutralizing The nitrogen dioxide generated after benefit wind oxygenation in tail gas；Upper strata clean water does not pass through basification, and main function is：First, utilize Tail gas takes away clean steam；Second, the droplet condensation for making to rise in whirlwind declines, " Bai Long " phenomenon is reduced, third, being sprayed by improving Water drenching amount, while increase the blow rate required of axial flow blower, " cooling tower " function can be formed；Fourth, relative individual layer alkalescence Water spray, Lower floor's alkalescence water ph value of double layers of sprinkling can be with some larger, and neutralization is more preferable, because if the spray of individual layer alkalescence Water spray Water drenching pH value is larger, is likely to result in the pollution to air during exhaust emissions, and the upper strata shower water of double layers of sprinkling Tail gas can be diluted, while promotes droplet to sink, does not have the above situation, so individual layer alkalescent water spray is more suitable for tail The less simplified version handling process of gas disposal amount, and double layers of sprinkling is adapted to vent gas treatment amount larger, it is necessary to " cooling tower " function Tail gas treatment process.

Alkaline water spray process mitigates white imperial phenomenon, the alkalescence by carrying out spraying cooling again to tail gas before discharging What water was layered for the clean water body after the Water warfare deslagging process filter cleaner and with aqueous vapor rotating separation crust block technique Clean water body adds basic formulations and is prepared, and the purpose of the technique is：

Nitric oxide and oxygen reaction generation nitrogen dioxide, vaporific shower water in tail gas dissolve in nitrogen dioxide in water Nitric acid is formed, then is neutralized by shower water neutral and alkali material into salt and water；

The condensation vapor with microparticle in tail gas into big water droplet, decline, crust block, slagging-off；

This region is full of water smoke by spray, adhere to fine solid particle using water smoke for the last time, further reduce tail gas In dust discharge amount, dust emission can be made to be down to less than 20mg/ cubes；

Spraying cooling, in winter, exhaust temperature is further decreased to close to environment temperature, discharge tail gas is greatly lowered Mist state (i.e. current winter common " Bai Long " phenomenon)；

Return and evaporate absorption formaldehyde, be reduced to the formaldehyde in tail gas minimum, it is ensured that to realize qualified discharge.

Meanwhile tail gas can also take away part spray steam, be filtered out condensing and being crossed by the Water warfare deslagging process The clean water body of part cleaning water body and the layering of aqueous vapor rotating separation crust block technique after slag, is taken away by exhaust emissions, avoided The investment of great number water treatment facilities.

Further, the first step high speed and high pressure spray-chilling and suction aldehyde technique are tapered pipeline high speed and high pressure mist Change spraying cooling and inhale aldehyde region technique, i.e.,：By tail gas by first tapered caliber, wind speed, then anxious expander footpath are improved, patch pipeline The a large amount of dust of inwall operation implements spraying and dedusting before being rolled onto the anxious nozzle for expanding position with venturi principle, by such one-level or The venturi reducing dedusting spray piping of plural serial stage, makes tail gas gather at the tapered place of caliber in pipeline centrally through pipeline, tail Dust granules, the fibrous caking carried in gas is then spread apart at caliber urgency expansion to tube wall, is sprayed with the atomization being arranged on tube wall Water drenching gas is sufficiently mixed, and water-setting sedimentation, improves spraying and dedusting efficiency.Tail gas wind speed at reducing first rises to be declined again, makes tail gas The dust of middle carrying spreads to tube wall, and preferably the shower water of the spray head injection with being set on tube wall fuses, dedusting separation effect Fruit is more preferable.

Further, it is additionally provided with two level cyclone dust removal before the first step high speed and high pressure spray-chilling and suction aldehyde technique Technique, the tail gas for drying whirlwind discharge is carried out a cyclone dust removal again, the fiber grain thing of 40~80% in tail gas is removed Fall, be transmitted back to artificial board product line and comprehensively utilized；Mitigate the pressure of follow-up spray system dedusting to greatest extent, to greatest extent Reduce the treating capacity of fibre dust in water.

A kind of processing system for the modified technique that tail gas biochemical processing method is dried using above-mentioned MDF, including sequentially connect Drying cyclone dust collectors, spray-chilling pipeline, the spray column connect；

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.

The processing system of also a kind of modified technique that tail gas biochemical processing method is dried using above-mentioned MDF, including it is suitable The drying cyclone dust collectors of secondary connection, spray-chilling pipeline, increasing processing chamber；

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-chilling pipeline tail end carries one section of " u "-shaped crust block section, bottom and the automatic scraping slag filter of crust block section It is connected；

It is the overstriking section in the perpendicular section of smoke discharging pipe to increase processing chamber, from top to bottom, electricity is sequentially configured in processing chamber increasing From dedusting, deodorization area and water film dedusting area, third level spray head, water film dedusting area top are provided with the top of ionization dedusting, deodorization area Provided with second level spray head；

The water purification outlet of automatic scraping slag filter is sprayed by first order spray pipeline, second level spray pipeline, the third level Shower pipe road connects first order spray head, second level spray head and third level spray head respectively.

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；Its crust block section corresponds to gravity and sunk Pour point depression slag process area, increase processing chamber and sequentially correspond to low speed flue gas water film dedusting from bottom to up and inhale aldehyde process area, pipe Road formula ionization dedusting, deodorization process region, automatic scraping slag filter correspond to Water warfare deslagging process region.

Another kind application MDF described above dries the processing system of the modified technique of tail gas biochemical processing method, including suitable Drying cyclone dust collectors, spray-chilling pipeline, dust settling tank and the increasing processing chamber of secondary connection,

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-chilling pipeline output end tangentially connects the top of dust settling tank conical lower portion, dust settling tank cone Shape bottom lowest part is crust block area, is connected with automatic scraping slag filter；

Smoke discharging pipe lower end tangentially connects dust settling tank top, and it is the overstriking in the perpendicular section of smoke discharging pipe to increase processing chamber Section, from top to bottom, ionization dedusting, deodorization area and water film dedusting area are sequentially configured in processing chamber increasing, ionization dedusting, deodorization area Top is provided with third level spray head, and second level spray head is provided with the top of water film dedusting area；

The water purification outlet of automatic scraping slag filter is sprayed by first order spray pipeline, second level spray pipeline, the third level Shower pipe road connects first order spray head, second level spray head and third level spray head respectively.

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；Dust settling tank corresponds to aqueous vapor Rotating separation crust block process area, increase processing chamber and sequentially correspond to low speed flue gas water film dedusting from bottom to up and inhale aldehyde process island Domain and duct type ionization dedusting, deodorization process region, automatic scraping slag filter correspond to Water warfare deslagging process region.

The technological effect of dust settling tank is：By expanding tail gas air channel, it is optimal to 0.8 meter per second to reduce tail gas flow velocity The water film dedusting wind speed of cost performance, improve dust removing effects.

The above-mentioned MDF of 4th kind of application dries the processing system of the modified technique of tail gas biochemical processing method, including sequentially Drying cyclone dust collectors, spray-chilling pipeline, dust settling tank and the increasing processing chamber of connection,

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-chilling pipeline output end tangentially connects the top of dust settling tank conical lower portion, dust settling tank cone It is crust block area at the center of bottom, is connected with automatic scraping slag filter, crust block area outer ring is storage area, is dust in the middle part of dust settling tank Settling tank water film dedusting area, dust settling tank water film dedusting area top are provided with second level spray head；

Smoke discharging pipe lower end tangentially connects dust settling tank top；

It is the overstriking section in the perpendicular section of smoke discharging pipe to increase processing chamber, from top to bottom, master is sequentially configured in processing chamber increasing Dynamic whirlwind cooling, alkaline water spraying zone and ionization dedusting, deodorization area；

The cooling of active whirlwind, alkaline water spraying zone side wall are provided with axial flow blower, the air draft direction of axial flow blower chamfer to Ascending air that is upper, forming cyclone type, the cooling of active whirlwind, alkaline water spraying zone top are provided with fourth stage spray head；Ionization removes Third level spray head is provided with the top of dirt, deodorization area；

The sensor set in spray-chilling pipeline output end controls axial flow blower, adjustment axis stream by control system The air quantity and blast of blower fan；

The water purification outlet of automatic scraping slag filter, the storage area top of dust settling tank are respectively connected to tank top；

Tank bottom passes through first order spray pipeline, second level spray pipeline, third level spray pipeline and fourth stage spray Shower pipe road connects first order spray head, second level spray head, third level spray head, fourth stage spray head respectively.

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；Dust settling tank bottom corresponds to Aqueous vapor rotating separation crust block process area, dust settling tank top correspond to low speed flue gas water film dedusting and inhale aldehyde process area, Increase processing chamber and sequentially correspond to duct type ionization dedusting, deodorization process region and the cooling of active whirlwind, alkaline water from bottom to up Atomizing spray process area, automatic scraping slag filter correspond to Water warfare deslagging process region.

The technological effect of dust settling tank is：By expanding tail gas air channel, it is optimal to 0.8 meter per second to reduce tail gas flow velocity The water film dedusting wind speed of cost performance, improve dust removing effects.

Further, water storage clarifier-tank and lower end and water storage of the automatic scraping slag filter including horizontal arrangement are net Change the inclined deslagging pond that pond is connected, one end away from deslagging pond is provided with U-shaped wastewater influent groove, U-shaped dirt in water storage clarifier-tank Deflector is stretched out diagonally downward towards deslagging pond, the spaced and parallel fixed conveyer belt of some scraper plates at water intake chamber upper end open One end is stretched into below U-shaped wastewater influent groove, and deslagging pond upper end is stretched out in one end upwards, and water storage clarifier-tank bottom opens up close to lower end to be taken The mouth of a river, screen cloth is covered on intake, it is characterised in that：

The water purification outlet of the automatic scraping slag filter includes main water purification outlet, standby water purification outlet, the 3rd net Water outlet and the 4th water purification outlet：

Between the deflector and chain type conveyor belt, one piece of roll bending is configured,

Roll bending upper end is located at deflector close to the lower section of U-shaped wastewater influent groove one end, and roll bending lower end is first towards deslagging pond one Side is stretched out, and is re-directed towards water storage clarifier-tank bottom fold, is stretched out towards U-shaped wastewater influent groove, last lower end is close to U-shaped wastewater influent The upward bending of groove, end are stretched out towards deslagging pond, and upper and lower end has the overlay segment being separated from each other, and form the flat spiral shell of at least one circle The structure that twists is revolved, inside roll bending, main water purification outlet is provided with below the section of stretching out of lower end；

Or roll bending upper end is fixedly arranged on deflector close to the lower section of deslagging pond one end, roll bending lower end first obliquely, towards U Type wastewater influent groove bending, close to upward bending at U-shaped wastewater influent groove, end is stretched out towards deslagging pond, in " J " toppled over Character form structure, main water purification outlet is provided with the inside of " J " font crotch；

Intake is standby water purification outlet, and main water purification outlet is higher than standby water purification outlet；

Water storage clarifier-tank side below U-shaped wastewater influent groove at water storage clarifier-tank bottom connection with being provided with the 3rd water purification Outlet；

Water storage clarifier-tank side above U-shaped wastewater influent groove, the overfall being provided with the top of water storage clarifier-tank are 4th water purification outlet, overfall are higher than deflector.

The spiral of roll bending is twisted structure or " J " character form structure, and water storage is purified when being and preventing main water purification outlet from drawing water The suspension of bottom of pond portion sedimentation smokes, prevents floating object to be extracted into main water purification outlet out of water storage clarifier-tank, clear beneficial to water body It is clean；In addition, the multistage bending design of roll bending is also advantageous that in precipitate suspended particles.

The beneficial effects of the present invention are：

1st, multilevel cyclone dust collection technique mesh can remove the fiber grain thing of more than 80% in tail gas, be transported to production Line is comprehensively utilized, and reduces vent gas treatment cost, while save Wood-based Panel Production cost；

2nd, tapered pipeline high speed and high pressure spray-chilling and inhale aldehyde region technique can make the dust that is carried in tail gas to Tube wall spreads, and 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 be discharged and separated in time by aqueous vapor separation crust block technique, will need not entirely be produced during deslagging System-down, and without manually cleaning, the clean water body separated can also reduce water body and deposit with exhaust emissions The cost of storage；

4th, Water warfare deslagging process separates aqueous vapor stratification containing water slurry, the circulating filtration collected in crust block technique, The dust-filtering in water body, deslagging, maintain water body more clean, it is ensured that the dust lower content in system circulation water, to prevent The blocking probability of water pump, shower nozzle, valve, water mist dust-removing packing material etc. in system, the stable operation that improves whole system is horizontal, Reduce maintenance workload；

5th, duct type ionizes dedusting, deodorization process not only small volume, and equipment cost is low, while can also improve ionization and remove Dirt, the efficiency of deodorization；

6th, the cooling of active whirlwind, alkaline water atomizing spray technique or alkaline water spray process, it is not only obvious to mitigate " in vain Dragon " phenomenon, also takes away corresponding vapour quantity, " production waste water " nothing caused by preventing 20~30 tons of condensed waters per hour because mending air quantity Method handles and has to increase huge investment to build Sewage Disposal.

7th, dust and content of formaldehyde in can further reducing tail gas on the basis of existing process, improve exhaust emissions Index.

Brief description of the drawings

Fig. 1 is the structural representation of the first optimum decision system of the invention

Fig. 2 is the structural representation of second of optimum decision system of the invention

Fig. 3 is the structural representation of the third optimum decision system of the invention

Fig. 4 is the structural representation of the 4th kind of optimum decision system of the invention

Fig. 5 is a kind of preferred scheme front view of automatic scraping slag filter

Fig. 6 is the enlarged diagram of roll bending in Fig. 5

Fig. 7 is the enlarged diagram of another roll bending

In Fig. 1~7：1 is dries cyclone dust collectors, and 2 be tapered pipeline spray-chilling pipeline, and 201 be that venturi becomes Footpath dedusting spray piping, 202 be isometrical spray piping；3 be spray column, and 302 be first order spray pipeline, and 303 be spray column water Cyclone turns Disengagement zone, and 305 be the cooling of spray column active whirlwind, alkaline water spraying zone, and 306 be spray column water film dedusting area, and 4 be first Aldehyde agent for capturing preparation vessel, 5 is increase processing chamber, and 501 be ionization dedusting, deodorization area, and 502 be the cooling of active whirlwind, alkaline water spray Area is drenched, 503 be water film dedusting area, and 6 be alkali lye preparation tank, and 7 be dust settling tank, and 701 be dust settling tank water film dedusting area, 8 It is tank for axial flow blower, 9,10 be automatic scraping slag filter, and 101 be water storage clarifier-tank, and 102 be deslagging pond, and 103 be U-shaped Wastewater influent groove, 104 be conveyer belt, and 105 be scraper plate, and 106 be deflector, and 107 be intake, and 108 be roll bending, and 109 be to block ripple Baffle plate, 110 be main water purification outlet, and 112 be overfall, and 113 be the 3rd water purification outlet, and 11 be sludge pump.

Embodiment

The invention will be further described 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 present invention proposes a kind of MDF and dried at tail gas biochemistry The modified technique of reason method, the dust and formaldehyde that the technique can not only be on the basis of existing process in further reduction tail gas Content；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 bright It is aobvious to mitigate " Bai Long " phenomenon, moreover it is possible to prevent that " production waste water " can not be handled and had to caused by 20~30 tons of condensed waters per hour Increase huge investment to build Sewage Disposal；And crust block and water body can be discharged and separated in time, without will during deslagging Whole 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-shaped 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-filtering in tail gas Totally；

D, implement shower water dissolving to the formaldehyde in tail gas, major part (75~90%) formaldehyde in tail gas is dissolved substantially It is complete；

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.

Embodiment 1

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 shower between two sections of venturi reducing dedusting spray pipings 201 Road 202 connects；Venturi reducing dedusting spray piping 201 is Taper Pipe, along tail gas direct of travel, venturi reducing dedusting shower The caliber of road 201 is gradually reduced；Taper is 7~20 ° between the big small end of Taper Pipe, venturi reducing dedusting spray piping 201 and isometrical Ratio 0.8~1.5 between the radical length of 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 be formed cyclone type ascending air, be sprayed The cooling of leaching tower 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, in the top shape of spray column 3 Into " cooling tower " function, the cost of investment of independent cooling tower is reduced or remitted, i.e.,：Clean water spray flux is increased, increases and mends wind air quantity to 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.Because mending Wind direction is tangential direction, and the position forms whirlwind, so, water loss amount longer than common cooling tower cooler effective time 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%

Embodiment 2

As shown in Fig. 2 in the embodiment, the drying whirlwind that MDF dries tail gas biochemical treatment system and includes being sequentially connected with removes Dirt device 1, spray-chilling pipeline 2, increase processing chamber 5.

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 shower between two sections of venturi reducing dedusting spray pipings 201 Road 202 connects；Along tail gas direct of travel, the caliber of venturi reducing dedusting spray piping 201 is gradually reduced；In the embodiment, text Reducing dedusting spray piping 201 is Taper Pipe in mound, and taper is 7~20 ° between big small end, venturi reducing dedusting spray piping Ratio 0.8~1.5 between 201 and the radical length of isometrical spray piping 202.

It is in serpentine that spray-chilling pipeline 2 is overall, the upward bending of its tail end, and serpentine hypomere is crust block section, crust block section Bottom be connected by sludge pump 11 with automatic scraping slag filter 10, sludge pump 11 at interval of setting time section operate setting time Value.

It is the overstriking section in the perpendicular section of smoke discharging pipe to increase processing chamber 5, and the internal diameter ratio for increasing processing chamber 5 and smoke discharging pipe is 3: 1~8:1, increase processing chamber 5 and become larger section in the vertical reducing tubular that both ends are thin, stage casing is thick, its upper end barrel dliameter and removed for ionization Dirt, deodorization area 501, middle direct tube section are water film dedusting area 503；Ionize dedusting, the top of deodorization area 501 is provided with the third level and sprayed Head, the top of water film dedusting area 503 are provided with second level spray head.

The water purification outlet of automatic scraping slag filter 10 passes through first order spray pipeline 302, second level spray pipeline, the 3rd Level spray pipeline connects first order spray head, second level spray head and third level spray head respectively；On first order spray pipeline 302 Provided with formaldehyde catching agent preparation vessel 4；Second level spray pipeline, third level spray pipeline are provided with the and of formaldehyde catching agent preparation vessel 4 Alkali lye preparation tank 6.

The lower end of increasing processing chamber 5 of the lower section of water film dedusting area 503 is additionally provided with the 6th grade of spray head, the filtering of automatic scraping slag The water purification outlet of machine 10 connects the 6th grade of spray head by the 6th grade of spray pipeline, and the 6th grade of spray pipeline is caught provided with formaldehyde Catch agent preparation vessel 4 and alkali lye preparation tank 6.

Embodiment 3

As shown in figure 3, in the embodiment, the drying whirlwind that MDF dries tail gas biochemical treatment system and includes being sequentially connected with removes Dirt device 1, spray-chilling pipeline 2, dust settling tank 7 and increasing processing chamber 5.

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 shower between two sections of venturi reducing dedusting spray pipings 201 Road 202 connects；Along tail gas direct of travel, the caliber of venturi reducing dedusting spray piping 201 is gradually reduced；In the embodiment, text Reducing dedusting spray piping 201 is Taper Pipe in mound, and taper is 7~20 ° between big small end, venturi reducing dedusting spray piping Ratio 0.8~1.5 between 201 and the radical length of isometrical spray piping 202.

The output end of spray-chilling pipeline 2 tangentially connects the top of the conical lower portion of dust settling tank 7, dust settling tank 7 conical lower portion lowest parts are crust block area, and crust block area is connected by sludge pump 11 with automatic scraping slag filter 10, sludge pump 11 every Setting time value is operated every setting time section.

Smoke discharging pipe lower end tangentially connects the top of dust settling tank 7, with the tangential mist for connecting the bottom of dust settling tank 7 Change spraying cooling pipeline 2 and be collectively forming rotary power, make the inward turning monsoon intensity of dust settling tank 7 stronger；Processing chamber 5 is increased as smoke evacuation Pipeline erects the overstriking section in section, and the internal diameter ratio for increasing processing chamber 5 and smoke discharging pipe is 3:1~8:1；It is in both ends to increase processing chamber 5 Carefully, the thick vertical reducing tubular in stage casing, its upper end barrel dliameter become larger section and are for ionization dedusting, deodorization area 501, middle direct tube section Water film dedusting area 503；Ionization dedusting, the top of deodorization area 501 are provided with third level spray head, and the top of water film dedusting area 503 is provided with the Two level spray head.

The water purification outlet of automatic scraping slag filter 10 passes through first order spray pipeline 302, second level spray pipeline, the 3rd Level spray pipeline connects first order spray head, second level spray head and third level spray head respectively；On first order spray pipeline 302 Provided with formaldehyde catching agent preparation vessel 4；Second level spray pipeline, third level spray pipeline are provided with the and of formaldehyde catching agent preparation vessel 4 Alkali lye preparation tank 6.

The lower end of increasing processing chamber 5 of the lower section of water film dedusting area 503 is additionally provided with the 6th grade of spray head, the filtering of automatic scraping slag The water purification outlet of machine 10 connects the 6th grade of spray head by the 6th grade of spray pipeline, and the 6th grade of spray pipeline is caught provided with formaldehyde Catch agent preparation vessel 4 and alkali lye preparation tank 6.

Embodiment 4

As shown in figure 4, in the embodiment, MDF dries the dry rotation that tail gas biochemical treatment system includes being sequentially connected with Wind deduster 1, spray-chilling pipeline 2, dust settling tank 7 and increasing processing chamber 5.

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 shower between two sections of venturi reducing dedusting spray pipings 201 Road 202 connects；Along tail gas direct of travel, the caliber of venturi reducing dedusting spray piping 201 is gradually reduced；Venturi reducing dedusting Spray piping 201 is Taper Pipe, and taper is 7~20 ° between big small end, venturi reducing dedusting spray piping 201 and isometrical spray Ratio 0.8~1.5 between the radical length of pipeline 202.

The output end of spray-chilling pipeline 2 tangentially connects the top of the conical lower portion of dust settling tank 7, dust settling tank It is crust block area at 7 cone bottom centers, crust block area is connected by sludge pump 11 with automatic scraping slag filter 10, and sludge pump 11 is at interval of setting Section of fixing time operates setting time value；Crust block area outer ring is storage area, and the middle part of dust settling tank 7 is dust settling tank water film dedusting Area 701, the top of dust settling tank water film dedusting area 701 are provided with second level spray head；

Smoke discharging pipe lower end tangentially connects the top of dust settling tank 7, and wrong with the output end of spray-chilling pipeline 2 180 ° are opened, so as to be collectively forming rotary power with spray-chilling pipeline 2, makes the inward turning monsoon intensity of dust settling tank 7 stronger；Add Big processing chamber 5 is the overstriking section in the perpendicular section of smoke discharging pipe, and the internal diameter ratio for increasing processing chamber 5 and smoke discharging pipe is 3:1~8:1；Add Big processing chamber 5 is thin in both ends, the thick vertical reducing tubular in stage casing, and its direct tube section upper end is the cooling of active whirlwind, alkaline Water spray Area 502, the direct tube section lower end of processing chamber 5 is increased as ionization dedusting, deodorization area 501.

The cooling of active whirlwind, the side wall of alkaline water spraying zone 502 are provided with axial flow blower 8, and axial flow blower 8 drops in active whirlwind Circumferentially arranged with a circle or multi-turn in temperature, the side wall of alkaline water spraying zone 502, radially provided with a row or multiple row, per some Individual axial flow blower 8 is arranged as one group, and multigroup axial flow blower 8 is configured in the cooling of active whirlwind, the side wall of alkaline water spraying zone 502, For forming region turbulent layer, the interval between multigroup axial flow blower 8 is not necessarily uniform, the quantity of every group of axial flow blower 8 and arrangement Also it is not necessarily identical；Or multiple evenly spaced configurations of axial flow blower 8 are in the cooling of active whirlwind, the side of alkaline water spraying zone 502 On wall；The air quantity of axial flow blower 8 is 50000~70000m³/ h, blast are 300~400Pa；The air draft direction beveling of axial flow blower 8 Upwards, the ascending air of cyclone type is formed, the cooling of active whirlwind, the top of alkaline water spraying zone 502 are provided with fourth stage spray head；Electricity Third level spray head is provided with from dedusting, the top of deodorization area 501；

The sensor set in the output end of spray-chilling pipeline 2 controls axial flow blower 8, adjustment axis by control system The air quantity and blast of flow fan 8；

The water purification outlet of automatic scraping slag filter 10, the storage area top of dust settling tank 7 are respectively connected on tank 9 Portion；

The bottom of tank 9 passes through first order spray pipeline 302, second level spray pipeline, third level spray pipeline and the 4th Level spray pipeline connects first order spray head, second level spray head, third level spray head, fourth stage spray head respectively；The first order Spray pipeline 302 is provided with formaldehyde catching agent preparation vessel 4；Second level spray pipeline, third level spray pipeline and fourth stage spray Pipeline is provided with alkali lye preparation tank 6.

Ionization dedusting, the lower end of increasing processing chamber 5 of the lower section of deodorization area 501 are additionally provided with the 6th grade of spray head, tank 9 Bottom connects the 6th grade of spray head by the 6th grade of spray pipeline, and the 6th grade of spray pipeline is provided with alkali lye preparation tank 6.

Embodiment 5

As shown in figure 5, automatic scraping slag filter 10 includes the water storage clarifier-tank 101 of horizontal arrangement and lower end purifies with water storage The inclined deslagging pond 102 that pond 101 is connected, one end away from deslagging pond 102 is entered provided with U-shaped sewage in water storage clarifier-tank 101 Tank 103, deflector 106 is stretched out diagonally downward towards deslagging pond 102 at the U-shaped upper end open of wastewater influent groove 103, it is spaced and parallel The U-shaped lower section of wastewater influent groove 103 is stretched into one end of conveyer belt 104 of fixed some scraper plates 105, and deslagging pond is stretched out in one end upwards 102 upper ends, the bottom of water storage clarifier-tank 101 open up intake 107 close to lower end, screen cloth 108 are covered on intake 107.

The water purification outlet of automatic scraping slag filter 10 includes main water purification outlet 110, standby water purification outlet, the 3rd net Water outlet 113) and the 4th water purification outlet：

Between deflector 106 and chain type conveyor belt 104, one piece of roll bending 108 is configured, deflector 106 is fixed on roll bending 108 On end, along the water body flow direction on deflector 106, the both sides downward bending of deflector 106, twice protection edge is formed, such as Fig. 5 institutes Show.

As shown in fig. 6, the lower end of roll bending 108 is first stretched out towards the side of deslagging pond 102, the bottom of water storage clarifier-tank 101 is re-directed towards Bending, stretched out towards U-shaped wastewater influent groove 103, last lower end is close to U-shaped 103 upward bending of wastewater influent groove, end direction row Slag bath 102 stretches out, and upper and lower end has an overlay segment being separated from each other, and forms the flat spiral of at least one circle and twists structure, in roll bending Inside 108, main water purification outlet 110 is provided with below the section of stretching out of lower end；

Or as shown in fig. 7, the upper end of roll bending 108 is fixedly arranged on deflector 106 close to the lower section of the one end of deslagging pond 102, roll bending 108 lower ends first obliquely, towards the U-shaped bending of wastewater influent groove 103, close to upward bending at U-shaped wastewater influent groove 103, end Portion is stretched out towards deslagging pond 102, and in " J " character form structure toppled over, main water purification outlet 110 is provided with the inside of " J " font crotch.

Intake 107 is standby water purification outlet, and main water purification outlet 110 is higher than standby water purification outlet；

The side of water storage clarifier-tank 101 below U-shaped wastewater influent groove 103 at the bottom connection of water storage clarifier-tank 101 with setting There is the 3rd water purification outlet 113；

The side of water storage clarifier-tank 101 above U-shaped wastewater influent groove 103, it is provided with close to the top of water storage clarifier-tank 101 Overfall 112 is the 4th water purification outlet, and overfall 112 is higher than deflector 106.

Parallel interval sets and blocks ripple baffle plate 109 on deflector 106, blocks water body of the ripple baffle plate 109 on deflector 106 Flow direction configures, and multiple block is parallel to each other between ripple baffle plate 109, blocks ripple baffle plate 109 as the right angle angle steel section that Open Side Down.

Claims (11)

1. a kind of MDF dries the modified technique of tail gas biochemical processing method, comprise the following steps：

The first step, high speed and high pressure spray-chilling and suction aldehyde；

Second step, low speed flue gas water film dedusting and suction aldehyde；

It is characterized in that：

Aqueous vapor separation crust block technique is set up between the first step, second step, by the tail gas after first step spraying cooling and water and water The dust granules of carrying, fibrous caking separation：Dust granules, fibrous caking after water-setting condense into mud, and water decline together, Rest on reserved area, tail gas quickly through and ascend into lower road PROCESS FOR TREATMENT；The mud of reserved area and water are periodically taken out Row, Water warfare deslagging process is carried out, the water after processing recycles in each operation；

The aqueous vapor separation crust block technique is gravitational settling crust block technique, and air-water mixture is implemented into powder by one section of U-shaped pipe Dirt, particle sedimentation, tail gas is quickly through dust granules, fibrous caking after water and water-setting rest on the bottom of crust block separate pipeline Portion, the mixture of water and mud is formed, and instant or interruption discharge contains water slurry；

Or aqueous vapor separation crust block technique be aqueous vapor rotating separation crust block technique, make air-water mixture tangentially into dividing From chamber pool inner wall, water, cyclone are formed in disengagement chamber, the current of rotation condense the dust granules after water-setting, fibrous caking Contain water slurry in the center of disengagement chamber basin bottom, instant or interruption discharge into mud alluvial；It is layered in mud outer ring Clean water body filtration after return and recycled in each sequence with water conservancy project, tail gas is lifted off disengagement chamber and enters lower road PROCESS FOR TREATMENT；

The Water warfare deslagging process is by the stratification containing water slurry of aqueous vapor separation crust block technique discharge, makes deslagging sedimentation simultaneously Discharge in time, the clean water body obtained after processing returns to be recycled in each sequence with water conservancy project.

2. MDF according to claim 1 dries the modified technique of tail gas biochemical processing method, it is characterised in that：Described Duct type ionization dedusting, deodorization process are additionally provided with after two step low speed flue gas water film dedustings and suction aldehyde technique, utilizes warp in the duct The clean water body crossed after the processing of Water warfare deslagging process carries out ionizing dedusting and spray to tail gas.

3. the MDF according to claims 1 or 2 dries the modified technique of tail gas biochemical processing method, it is characterised in that：Institute After stating low speed flue gas water film dedusting and inhaling aldehyde technique, or, it is additionally provided with active whirlwind drop after the ionization dedusting, deodorization process Temperature, alkaline water atomizing spray technique, rotation is implemented to the tail gas after dedusting according to tail gas discharge capacity VFC strong blast volume axial-flow fan Turn driving, tail gas cyclone type is increased, while alkaline Water spray is carried out to tail gas, described alkaline water is to pass through the Water warfare Clean water body after deslagging process filter cleaner and the clean water body addition alkalescence system with the layering of aqueous vapor rotating separation crust block technique Agent is prepared：

Wind oxygenation is mended, the nitric oxide in tail gas and oxygen reaction are generated nitrogen dioxide, vaporific shower water is nitrogen dioxide Dissolve in and nitric acid is formed in water, then neutralized by shower water neutral and alkali material into salt and water；

The condensation vapor with microparticle in tail gas into big water droplet, decline, crust block, slagging-off；

Turbulent fluctuation laminar flow is formed, the mixed proportion of tail gas and water is further improved, water smoke is sufficiently mixed with tail gas as far as possible, on the one hand Cooling, on the one hand improve efficiency of dust collection；

Fine solid particle is adhered to using water smoke；

Wind cooling is mended, in winter, by shower water and wind is mended exhaust temperature is further decreased to close to environment temperature, significantly Reduce the mist state of discharge tail gas；

Return and evaporate absorption formaldehyde, be reduced to the formaldehyde in tail gas minimum, it is ensured that to realize qualified discharge；

Absorb again, reduce odor concentration (VOC)；

Mend wind and take away steam, part cleaning water body and aqueous vapor condensation and after the Water warfare deslagging process filter cleaner The clean water body of rotating separation crust block technique layering, 3~6 times of air quantity discharge supplemented by axial flow blower are taken away.

4. the MDF according to claims 1 or 2 dries the modified technique of tail gas biochemical processing method, it is characterised in that：Institute State low speed flue gas water film dedusting and be additionally provided with alkaline water spray with after suction aldehyde technique or after duct type ionization dedusting, deodorization process Leaching technique, the alkaline water for after the Water warfare deslagging process filter cleaner clean water body and with aqueous vapor rotating separation The clean water body of crust block technique layering adds basic formulations and is prepared：

Nitric oxide and oxygen reaction generation nitrogen dioxide in tail gas, vaporific shower water, which dissolves in nitrogen dioxide in water, to be formed Nitric acid, then neutralized by shower water neutral and alkali material into salt and water；

The condensation vapor with microparticle in tail gas into big water droplet, decline, crust block, slagging-off；

Fine solid particle is adhered to using water smoke；

Spraying cooling, in winter, exhaust temperature is further decreased to close to environment temperature, the mist of discharge tail gas is greatly lowered State；

Return and evaporate absorption formaldehyde, be reduced to the formaldehyde in tail gas minimum, it is ensured that to realize qualified discharge；

Tail gas takes away part spray steam, the part clean water condensation and after the Water warfare deslagging process filter cleaner Body and the clean water body of aqueous vapor rotating separation crust block technique layering, are taken away by exhaust emissions.

5. MDF according to claim 1 dries the modified technique of tail gas biochemical processing method, it is characterised in that：Described One step high speed and high pressure spray-chilling and suction aldehyde technique are tapered pipeline high speed and high pressure spray-chilling and inhale aldehyde region work Skill, by tail gas by first tapered caliber, wind speed, then anxious expander footpath are improved, a large amount of dust that patch inner-walls of duct is run is with literary mound In principle be rolled onto the anxious nozzle for expanding position before implement spraying and dedusting, pass through venturi reducing dedusting of so one or more levels series connection Spray piping, tail gas is set to gather at the tapered place of caliber in pipeline centrally through pipeline, dust granules, the fiber knot carried in tail gas Group then spreads apart at caliber urgency expansion to tube wall, is sufficiently mixed with the atomizing spray aqueous vapor being arranged on tube wall, water-setting sedimentation, carries High spraying and dedusting efficiency.

6. MDF according to claim 1 dries the modified technique of tail gas biochemical processing method, it is characterised in that：Described Two level cyclone dust removal technique is additionally provided with before one step high speed and high pressure spray-chilling and suction aldehyde technique, the tail for drying whirlwind discharge Gas carries out a cyclone dust removal again, and the fiber grain thing of 40~80% in tail gas is removed, artificial board product line is transmitted back to and enters Row comprehensive utilization；Mitigate the pressure of follow-up spray system dedusting, reduce the treating capacity of fibre dust in water.

7. a kind of processing system for the modified technique for applying MDF as claimed in claim 1 to dry tail gas biochemical processing method, its It is characterised by：Including the drying cyclone dust collectors (1), spray-chilling pipeline (2), spray column (3) being sequentially connected with；

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.

8. a kind of processing system for the modified technique for applying MDF as claimed in claim 1 to dry tail gas biochemical processing method, its It is characterised by：Including the drying cyclone dust collectors (1), spray-chilling pipeline (2), increasing processing chamber (5) being sequentially connected with；

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-chilling pipeline (2) tail end carries one section of " u "-shaped crust block section, bottom and the automatic scraping slag filter of crust block section (10) it is connected；

It is the overstriking section in the perpendicular section of smoke discharging pipe to increase processing chamber (5), from top to bottom, is sequentially configured increasing in processing chamber (5) Dedusting, deodorization area (501) and water film dedusting area (503) are ionized, being provided with the third level at the top of ionization dedusting, deodorization area (501) sprays Head, second level spray head is provided with the top of water film dedusting area (503)；

The water purification outlet of automatic scraping slag filter (10) passes through first order spray pipeline (302), second level spray pipeline, the 3rd Level spray pipeline connects first order spray head, second level spray head and third level spray head respectively.

9. a kind of processing system for the modified technique for applying MDF as claimed in claim 1 to dry tail gas biochemical processing method, its It is characterised by：Including be sequentially connected with drying cyclone dust collectors (1), spray-chilling pipeline (2), dust settling tank (7) and Processing chamber (5) is increased,

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-chilling pipeline (2) output end tangentially connects the top of dust settling tank (7) conical lower portion, dust settling tank (7) conical lower portion lowest part is crust block area, is connected with automatic scraping slag filter (10)；

Smoke discharging pipe lower end tangentially connects dust settling tank (7) top, and it is that smoke discharging pipe erects adding in section to increase processing chamber (5) Thick section, from top to bottom, ionization dedusting, deodorization area (501) and water film dedusting area (503) are sequentially configured in processing chamber (5) increasing, Third level spray head is provided with the top of ionization dedusting, deodorization area (501), second level spray head is provided with the top of water film dedusting area (503)；

The water purification outlet of automatic scraping slag filter (10) passes through first order spray pipeline (302), second level spray pipeline, the 3rd Level spray pipeline connects first order spray head, second level spray head and third level spray head respectively.

10. a kind of processing system for the modified technique for applying MDF as claimed in claim 1 to dry tail gas biochemical processing method, It is characterized in that：Including the drying cyclone dust collectors (1), spray-chilling pipeline (2), dust settling tank (7) being sequentially connected with With increase processing chamber (5),

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-chilling pipeline (2) output end tangentially connects the top of dust settling tank (7) conical lower portion, dust settling tank (7) it is crust block area to bore at the center of bottom, is connected with automatic scraping slag filter (10), and crust block area outer ring is storage area, dust settling tank (7) middle part is dust settling tank water film dedusting area (701), and being provided with the second level at the top of dust settling tank water film dedusting area (701) sprays Drench head；

Smoke discharging pipe lower end tangentially connects dust settling tank (7) top；

It is the overstriking section in the perpendicular section of smoke discharging pipe to increase processing chamber (5), from top to bottom, is sequentially configured increasing in processing chamber (5) The cooling of active whirlwind, alkaline water spraying zone (502) and ionization dedusting, deodorization area (501)；

The cooling of active whirlwind, alkaline water spraying zone (502) side wall are provided with axial flow blower (8), the air draft direction of axial flow blower (8) Beveling is upward, forms the ascending air of cyclone type, and fourth stage spray is provided with the top of the cooling of active whirlwind, alkaline water spraying zone (502) Drench head；Third level spray head is provided with the top of ionization dedusting, deodorization area (501)；

The sensor set in spray-chilling pipeline (2) output end controls axial flow blower (8), adjustment axis by control system The air quantity and blast of flow fan (8)；

The water purification outlet of automatic scraping slag filter (10), the storage area top of dust settling tank (7) are respectively connected to tank (9) Top；

Tank (9) bottom passes through first order spray pipeline (302), second level spray pipeline, third level spray pipeline and the 4th Level spray pipeline connects first order spray head, second level spray head, third level spray head, fourth stage spray head respectively.

11. the MDF according to claim 7,8,9 or 10 dries tail gas biochemical treatment system, the automatic scraping slag filtering The inclined deslagging that machine (10) includes the water storage clarifier-tank (101) of horizontal arrangement and lower end is connected with water storage clarifier-tank (101) Pond (102), one end away from deslagging pond (102) is provided with U-shaped wastewater influent groove (103), U-shaped sewage in water storage clarifier-tank (101) Deflector (106) is stretched out diagonally downward towards deslagging pond (102) at intake chamber (103) upper end open, if spaced and parallel fixed Conveyer belt (104) one end of dry scraper plate (105) is stretched into below U-shaped wastewater influent groove (103), and deslagging pond is stretched out in one end upwards (102) upper end, water storage clarifier-tank (101) bottom open up intake (107) close to lower end, and intake covers screen cloth on (107) (108), it is characterised in that：

The water purification outlet of the automatic scraping slag filter (10) includes main water purification outlet (110), standby water purification outlet, Three water purification outlets (113) and the 4th water purification outlet：

Between the deflector (106) and chain type conveyor belt (104), one piece of roll bending (108) is configured,

Roll bending (108) upper end is located at deflector (106) under the lower section of U-shaped wastewater influent groove (103) one end, roll bending (108) End is first stretched out towards deslagging pond (102) side, water storage clarifier-tank (101) bottom fold is re-directed towards, towards U-shaped wastewater influent groove (103) to stretch out, last lower end is stretched out close to the upward bending of U-shaped wastewater influent groove (103), end towards deslagging pond (102), upper, There is an overlay segment being separated from each other lower end, and forms the flat spiral of at least one circle and twists structure, internal in roll bending (108), lower end is stretched Go out below section and be provided with main water purification outlet (110)；

Or roll bending (108) upper end is fixedly arranged on deflector (106) under the lower section of deslagging pond (102) one end, roll bending (108) End first obliquely, towards U-shaped wastewater influent groove (103) bending, close to the upward bending in U-shaped wastewater influent groove (103) place, end Stretched out towards deslagging pond (102), in " J " character form structure toppled over, main water purification outlet is provided with the inside of " J " font crotch (110)；

Intake (107) is standby water purification outlet, and main water purification outlet (110) is higher than standby water purification outlet；

At water storage clarifier-tank (101) side and water storage clarifier-tank (101) bottom connection below U-shaped wastewater influent groove (103) Provided with the 3rd water purification outlet (113)；

Water storage clarifier-tank (101) side above U-shaped wastewater influent groove (103), it is provided with the top of water storage clarifier-tank (101) Overfall (112) be the 4th water purification outlet, overfall (112) is higher than deflector (106).