CN104083978B - A kind of green liquor dissolving tank exhaust recovery device - Google Patents
A kind of green liquor dissolving tank exhaust recovery device Download PDFInfo
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Abstract
The invention discloses a kind of green liquor dissolving tank exhaust recovery device, dissolving tank blast pipe respectively with dissolving tank exhaust outlet, cyclone separator air inlet is connected, feeding spraying pump water inlet pipe exports with the green liquor on green liquor dissolving tank respectively, feeding spraying pump is connected, variable-frequency motor respectively with feeding spraying pump, frequency converter is connected, spray header respectively with cyclone separator, feeding spraying pump is connected, green liquor pipe is connected with the green liquor import on green liquor dissolving tank, green liquor pipe exports with the green liquor on cyclone separator and is connected, vortex finder connects vortex finder outlet and entrainment trap import, temperature sensor respectively with vortex finder, Temperature displaying/control unit is connected, condensate pipe respectively with condensate water import, condensate water outlet is connected, entrainment trap blast pipe respectively with entrainment trap exhaust outlet, exhaust air-introduced machine is connected.Structure is simple, saves water and energy, effectively reclaims pernicious gas, improve production exercise environment, alleviate the corrosion of steel structure factory building primary structure member.
Description
Technical field
The present invention relates to paper industry pulping waste liquor combustion method and reclaim alkali technical field, more specifically relate to a kind of green liquor dissolving tank exhaust recovery device, be applicable to the waste gas recovery of green liquor dissolving tank exhaust.
Background technology
The fused mass (main component is sodium carbonate and vulcanized sodium) that green liquor dissolving tank (or being called for short dissolving tank) produces after being used for collecting papermaking wastewater (black liquor) burning, fused mass flows into dissolving tank, dissolve in water or rare white liquid (sig water based on NaOH) in groove, form green liquor (main component is water, sodium carbonate and vulcanized sodium).Flow in the engineering of green liquor dissolving tank at fused mass, the fused mass of about 750 DEG C ~ 970 DEG C through steam, water or rare white liquid separately or mixing smash, reach and dissolve noise reduction object.Slight explosive sound can be produced in noise reduction and course of dissolution, and produce a large amount of flash steams, a small amount of fused mass dust alkali dirt (very tiny Na
2sO
4and Na
2cO
3particle, accounts for 5% of alkali stove burning solid content amount), green liquor droplet, reproducibility sulfide gas (TRS).Fused mass dust and reproducibility sulfide gas are the major pollutants of dissolving tank exhaust.For reaching discharging standards, prevent the sulfide gas (mainly hydrogen sulfide (H of peculiar smell
2s) gas, and a small amount of methyl mercaptan (CH
3sH), methyl ether (CH
3sCH), dimethyl disulfide (CH
3sSH
3) etc. organic sulfur compound) and alkali dirt (very tiny Na
2sO
4and Na
2cO
3particle, accounts for 5% of alkali stove burning solid content amount) spread to around alkali collection furnace roof and factory building, cause environmental pollution, the bearing carrier in infringement house, this device is essential.
Up to now, following several dissolving tank gas discharging form is mainly contained both at home and abroad.
1, directly discharge
The alkali collection engineering of domestic ton paper plant adopts blast pipe usually, is received by blast pipe outside the roofing of boiler top, directly enters air.Its major defect has:
1. Long-Time Service directly discharges, and makes plant area have hydrogen sulfide (H
2s) gas peculiar smell, and cause environmental pollution.
2. cause factory building roof to gather a large amount of sode ash dust simultaneously, meet rain and form alkali lye, corrosion is produced to steel-structure factory building.
2, conventional water spray dust method
The alkali collection engineering of domestic ton paper plant adopts water spray dust's method usually.Its method is the blast pipe guided to by the liquid in green liquor dissolving tank near dissolving tank exhaust outlet, and from blast pipe, perforate sprays into green liquor, forms spray water mist, reaches depositing dust object.
Major defect has:
1. the discharge of part alkali dirt can only be reduced;
2. because the solubility of sulfide gas in water is very little, water spray dust's method can not stop the discharge of sulfide substantially.
2, washer depositing dust method
In the later stage nineties in last century, be widely used washer in the alkali collection engineering of large-scale paper mill and dissolving tank exhaust is washed.Washer generally adopts venturi type, and gas is introduced bottom washer; In the middle part of washer, filler is housed, top has cleaning solution to spray, can flash steam in coolant exhaust, washing exhaust dust, absorb a small amount of sulfide, the cleaning solution that washing produces flows into dissolving tank.Can reduce pollutant emission largely, reduce environmental pollution, but there is clean result difference, be difficult to the problems such as long-term operation continuously in system.
Major defect has:
1. washer shower nozzle and stuffing hole easily block, and cannot run continuously for a long time;
2. most of sulfide is water insoluble, can not lower the concentration of emission of sulfide on basic;
3. because washer easily blocks, air exhauster is made to produce high energy consumption;
4. for reducing the temperature of flash steam, clear water spray is employed.Because the consumption of spray washing water is large, destroy the balance of the concentration of lye of system.
Summary of the invention
The object of the invention is to there are provided a kind of green liquor dissolving tank exhaust recovery device, this device system can solve foul smell in the exhaust of alkali recovery furnace combustion product supporting green liquor dissolving tank and alkali dirt emission problem.This device overall structure is simple, and operation energy consumption is low, and water discharge capacity is few, operation automation; Effectively improve alkali collection production exercise environment, significantly reduce the impact of polluting environment; Effectively reduce corrosive concentration, alleviate the extent of corrosion of mill construction primary structure member, be conducive to reducing the problem of emission gases to mill construction corrosion of component grade.
In order to realize above-mentioned task, the present invention by the following technical solutions:
A kind of green liquor dissolving tank exhaust recovery device, it comprises: green liquor dissolving tank, feeding spraying pump, cyclone separator, entrainment trap, exhaust air-introduced machine, dissolving tank blast pipe, vortex finder, entrainment trap blast pipe, air-introduced machine blast pipe, feeding spraying pump water inlet pipe, spray header, green liquor pipe, condensate pipe, temperature sensor, pressure transmitter, PLC control device.
It is characterized in that: green liquor dissolving tank is located at a flooring (± 0.00m) position, green liquor dissolving tank is provided with the first dissolving tank exhaust outlet, second green liquor outlet, 3rd green liquor import, 4th condensate water import, dissolving tank blast pipe respectively with the first dissolving tank exhaust outlet, first cyclone separator air inlet is connected, be provided with three layers in dissolving tank blast pipe to give a dinner of welcome, blast pipe spray head is used in cooling, feeding spraying pump water inlet pipe exports with the second green liquor on green liquor dissolving tank respectively, feeding spraying pump is connected, variable-frequency motor respectively with feeding spraying pump, frequency converter is connected, frequency converter is connected with Temperature displaying/control unit, spray header respectively with cyclone separator, feeding spraying pump is connected, green liquor pipe is connected with the 3rd green liquor import on green liquor dissolving tank, green liquor pipe exports with the 3rd green liquor on cyclone separator and is connected, cyclone separator is provided with the first cyclone separator air inlet, second cyclone separator exhaust outlet, 3rd green liquor outlet, 4th hopper spray head, vortex finder connects the second vortex finder outlet and entrainment trap import, temperature sensor respectively with vortex finder, Temperature displaying/control unit is connected, pressure transmitter respectively with dissolving tank blast pipe, pressure display/control unit is connected, condensate pipe respectively with the 4th condensate water import, condensate water outlet is connected, entrainment trap is provided with entrainment trap air inlet, entrainment trap exhaust outlet, condensate water exports, entrainment trap blast pipe respectively with entrainment trap exhaust outlet, exhaust air-introduced machine is connected, exhaust air-introduced machine blast pipe connects air-introduced machine and combustion furnace, PLC control device is made up of programmable logic controller (PLC) and host computer, containing display/control unit, pressure display/control unit.Variable-frequency motor on exhaust air-introduced machine shows with frequency converter, pressure respectively/and control unit is connected; Frequency converter is connected with Temperature displaying/control unit; Temperature sensor is connected with vortex finder, Temperature displaying/control unit respectively.Variable-frequency motor respectively frequency converter, pressure display/control unit is connected.
Each part function and efficacy is:
1., feeding spraying pump act as with spray header water inlet pipe: be connected green liquor dissolving tank and feeding spraying pump, feeding spraying pump outlet spray header connects dissolving tank blast pipe spray head respectively, and cyclone separator hopper spray head; Blast pipe spray head divides three layers, shower water fully and containing exit gases, play give a dinner of welcome, cooling effect, the dust in the exhaust of removing major part, makes the flash steam in exhaust lower the temperature, condense.The dust going the green liquor separated and dissolved of cyclone separator spray head to go out, enters green liquor dissolving tank by green liquor pipe.
2., the effect of cyclone separator is: remove the solid particle in gas and drop, reach gas-solid-liquid and be separated.
Cyclone separator adopts vertical cylinder structure, and inside is divided into liquid collecting zone, cyclone separation, district of clean room etc. vertically.In-built Whirlwind cyclone component, circumferentially evenly arranged and also fixed by upper lower perforated plate in direction; Equipment adopts skirt to support, and end socket adopts high pressure resistant ellipse end socket.
The equipment mouth of pipe provides the flange, bolt, pad etc. of pairing.
Usually, gas access design point three kinds of forms:
A) top air inlet; B) middle part air inlet; C) bottom air inlet
For moisture, normal adopt bottom air inlet scheme, because bottom air inlet can utilize equipment lower space, drop diameter being greater than to 300 μm or 500 μm carries out pre-separation to alleviate the load of cyclone section.And middle part air inlet or top air inlet are often adopted for dry gas.Top air inlet distribution is even, but device diameters and device height all will increase, and invest higher; And middle part air inlet can reduce device height and reduce cost.
Cyclone separator is applicable to purify and is greater than the non-sticky of 1-3 micron, the dried dust of non-fiber.It is that a kind of structure is simple, easy to operate, high temperature resistant, the cleaning equipment of cost of equipment and resistance higher (80 ~ 160 millimeter of water), and cyclone dust collectors are applied the most extensive in cleaning equipment.Follow-on cyclone separator in partial devices for replacing exhaust filtration devices.The separating effect of cyclone separator: under design pressure and tolerance condition, all can remove >=the solid particle of 10 μm.At operating point, separative efficiency is 99%, and in operating point ± 15% scope, separative efficiency is 97%.
Under normal running conditions, separate unit cyclone separator is not more than 0.05MPa in operating point pressure drop.
The design service life of cyclone separator is no less than 20 years.
3., the effect of entrainment trap the drop in exhaust is caught by paving separate.Cyclone outlet blast pipe connects ripple folded plate type entrainment trap, gas flow rate operating mode: 8 ~ 9.6m/s.
Leave the liquid foam being still entrained with a great deal of in the steam of cyclone separator, namely entrainment, if without separation and recovery, the corrosion of generation e-quipment and pipe will be made, blocking pipe time serious.Adding entrainment trap effect is exactly the gas of process containing a small amount of lime set, realizes lime set and reclaims and gas phase purifying.
Saturated gas is in cooling or pressure process, and a part of condensable gas component can form droplet and flow with gas.Its structure is exactly generally a pressure vessel, and inside has relevant air inlet component, drop to trap component; Utilize the internals of cyclone settling, impingement baffles or baffling ripple flap and so on, the liquid carried secretly is condensed further, discharges, to remove liquid in gas.
Conventional mist is separated generally centrifugal, impact type, ripple folded plate type.
Centrifugal being generally applicable to, is used in low flow velocity operating mode (3 ~ 4,5m/s), and separative efficiency is greater than 90%;
Inertia-type is generally applicable to being used in high flow rate operating mode, and the lower flow velocity of decompression should be greater than 25m/s, but separative efficiency can only reach 90%;
Ripple folded plate type is generally applicable to being used in middle low flow velocity operating mode (3 ~ 10m/s), and separative efficiency is higher, generally between 90% ~ 99%.
In configuration aspects, inertia-type is comparatively simple, centrifugally takes second place, and ripple folded plate type is the most complicated.Consider from the angle of separative efficiency, ripple folded plate type is best selection, and production practices also demonstrate this point.
The isolated drop of entrainment trap forms condensate water, enters green liquor dissolving tank from entrainment trap bottom by condensate pipe.
4., the effect of air-introduced machine makes dissolving tank blast pipe produce tiny structure (-50 ~-20Pa), discharges gas in dissolving tank smoothly; Send alkali collection special boiler to burn the exhaust containing reproducibility sulfide gas (TRS) simultaneously.
The fuel of alkali collection special boiler be concentrate, be atomized, dried paper mill pulping waste liquor---black liquor, its composition main component is the organic matter of about 70% and the inorganic matter of about 30%, and organic matter mainly contains: lignin (accounting for about 12% ~ 40%), organic acid and a small amount of short fiber, half fiber heteroproteose cell, aliphatic acid and saponified etc.Inorganic matter mainly contains: NaOH (accounting for about 60%-85%) and a small amount of vulcanized sodium, sodium carbonate, sodium sulphate, sodium thiosulfate, silica etc.
When the burning of alkali collection special boiler is sent in the exhaust of the dissolving tank containing reproducibility sulfide gas (TRS) after spraying, reclaiming, sulfide (vulcanized sodium, sodium sulphate etc.) can be formed, thus elimination pernicious gas, reclaim the sulfide medicine being used for pulping and paper-making and producing.
5., PLC control device 15 by Temperature displaying/control unit 15-1, pressure display/control unit 15-2 forms.
Temperature displaying/control unit 15-1, the detection signal of temperature sensor 14-1 feeds back to PLC through cable, and after PLC computing, export control signal and reach feeding spraying pump frequency converter 2-2 through cable, temperature parameter shows at host computer; The electric machine frequency of feeding spraying pump is regulated by gas temperature in spray final vacuum pipe, to ensure that delivery temperature drops to less than 80 DEG C, the flash distillation condensation in cheap exhaust.
Pressure display/control unit 15-2, the detection signal of pressure transmitter 14-2 feeds back to PLC through cable, and after PLC computing, export control signal and reach exhaust air-introduced machine frequency converter 5-2 through cable, pressure parameter shows at host computer.By regulating exhaust id-motor frequency, controlling dissolving tank exhaust outlet pressure (-50 ~-20Pa), ensureing that dissolving tank is vented unimpeded discharge; Avoid, because of the ultralow negative pressure producing dissolving tank top of excessively bleeding, making solution tank liquor face produce a large amount of double evaporation-cooling gas simultaneously.
The present invention compared with prior art, has the following advantages and effect:
1) this device can effectively remove dissolving tank exhaust in foul smell and alkali dirt, improve alkali collection production exercise environment, obviously alleviate the impact of environmental pollution.Effectively alleviate the extent of corrosion of mill construction primary structure member, effectively reduce medium to mill construction corrosion of component grade.
2) utilize green liquor to adopt circulated sprinkling water as this system, reclaim the alkali dirt in exhaust and steam condensate (SC), saving water resource.With washer depositing dust method with clear water-cooling dust but compared with, when 1000 tons of solid content/sky alkali recovery furnace runs, can clear water be saved with regard to this: 8.65 ~ 22.14 ten thousand steres/year.
3) dissolving tank exhaust send combustion furnace to burn, and reduces sulfide gas discharge, effectively reclaims chemical industry medicine---the sulfide of pulping and paper-making production.
4) automaticity of the present invention is high, can record in time, regulate and early warning dissolving tank and blast pipe tiny structure (-50 ~-20Pa), be convenient to discharge gas in dissolving tank smoothly; Prevent exhaust air-introduced machine from excessively bleeding simultaneously and produce the ultralow negative pressure of dissolving tank, cause dissolving tank liquid level indirect steam to produce and excessively exhaust; Reduce air-introduced machine energy consumption simultaneously, make air-introduced machine stable, ensure that Systematical control is uniform and stable.
The present invention is applicable to foul smell and the alkali dirt emission problem that system solves alkali recovery furnace dissolving tank.Use green liquor circulated sprinkling, improve in the past with the clear water consumption that clear water cooling press dust lane comes, maintain the balance of the concentration of lye of system, saved water resource.This device overall structure is simple, and can run continuously for a long time, operation energy consumption is low, and water discharge capacity is few, operation automation; Effectively improve alkali collection production exercise environment, obviously reduce the pollution of foul smell discharge to environment; Effective recovery sulfur compound waste gas, alleviates the corrosion to steel plant structure primary structure member, is conducive to reducing dust and waste gas to mill construction corrosion of component grade.In papermaking wastewater field of reclaiming, there is good application prospect.
Accompanying drawing explanation
Fig. 1 is a kind of green liquor dissolving tank exhaust recovery device structural representation.
Wherein: 1-green liquor dissolving tank, 1-1-the first dissolving tank exhaust outlet, 1-2-the second green liquor exports, 1-3-the 3rd green liquor import, 1-4-the 4th condensate water import, 2-feeding spraying pump (model: ZAP125-40-2P-37KW, flow: 160m
3/ h, Yang Cheng: 40m, contact liq part material is AISI304), 2-1 variable-frequency motor (power: 37KW, rotating speed: 2900r/min, 380V, market is purchased), 2-2-frequency converter (non-standard equipment, as: 6SE6440-2UD33-7EB1,37KW, market is purchased), 3-cyclone separator (non-standard equipment, as XF-32, import wind speed: 8 ~ 12.8m
3/ h, air quantity: 27000Nm
3/ h, market is purchased), 3-1-the first cyclone separator air inlet, 3-2-the second cyclone separator exhaust outlet, 3-3-the 3rd green liquor exports, 3-4-the 4th spray head (∮ 5mm, market is purchased), 4-entrainment trap (non-standard equipment, as: R201211, ∮ 1500mm, air quantity: 27000Nm
3/ h, market is purchased), 4-1-entrainment trap air inlet, 4-2-entrainment trap exhaust outlet, 4-3-condensate water outlet, 5-exhaust air-introduced machine (Y5-55 № 10, contact gas fraction is AISI304, and market is purchased), 5-1-variable-frequency motor (fire-proof motor, power: 30KW, rotating speed: 1450r/min, 380V, market is purchased), 5-2-frequency converter (non-standard equipment, as: 6SE6440-2UD33-0EB1,30KW, market is purchased), 6-dissolving tank blast pipe, 6-1-blast pipe spray head (∮ 5mm, market is purchased), 7-vortex finder, 8-entrainment trap blast pipe, 9-air-introduced machine blast pipe, 10-feeding spraying pump water inlet pipe, 11-spray header, 12-green liquor pipe, 13-condensate pipe, 14-1-temperature sensor (platinum resistance thermometer sensor, model: WZPK-240, market is purchased), 14-2-pressure transmitter (teletransmission pressure transmitter, model: WT3000CD0A02A1BH2B3L4DFE8, market is purchased), 15-PLC control system is (containing rack and module, rack model: YR-BF04, market is purchased): 15-1-Temperature displaying/control unit (modular unit, market is purchased), 15-2-pressure display/control unit (modular unit, market is purchased).
Note: this appliance arrangement model changes with production output.This unit type provided is: carry out type selecting by processing 1000t solid content combustion furnace supporting dissolving tank exhaust apparatus every day.
" module ", also known as component, the built-in CPU{ central processing unit (CPU, CentralProcessingUnit) of module is one piece of integrated circuit }.Module is for completing one section of program needed for a certain function or subprogram, is to name separately and complete the set (i.e. the aggregate of program code and data structure) of the program statement of certain function independently.
Non-standard equipment refers to that equipment is not standardized, does not produce in batches, does not have unified model.After device fabrication producer receives order, need require to carry out personalized Drawing Design, making according to user.For non-standard universal design, personalization drawing need be carried out.
Detailed description of the invention
Embodiment 1:
The invention will be further described with reference to the accompanying drawings:
A kind of green liquor dissolving tank exhaust recovery device, it comprises: green liquor dissolving tank 1, feeding spraying pump 2, cyclone separator 3, entrainment trap 4, exhaust air-introduced machine 5, dissolving tank blast pipe 6, vortex finder 7, entrainment trap blast pipe 8, air-introduced machine blast pipe 9, feeding spraying pump water inlet pipe 10, spray header 11, green liquor pipe 12, condensate water 13, temperature sensor 14-1, pressure transmitter 14-2, PLC control system 15.Its annexation is: green liquor dissolving tank 1 is located at a flooring (± 0.00m) position, and green liquor dissolving tank 1 is provided with the first dissolving tank exhaust outlet 1-1, the second green liquor outlet 1-2, the 3rd green liquor import 1-3, the 4th condensate water import 1-4; Dissolving tank front-seat gas port 1-1 in green liquor dissolving tank 1 top first connects dissolving tank blast pipe 6, be provided with in dissolving tank blast pipe 6 three layers give a dinner of welcome, cooling blast pipe spray head 6-1, shower water fully and containing exit gases, play give a dinner of welcome, cooling effect.Dissolving tank blast pipe 6 is connected with the first dissolving tank exhaust outlet 1-1, the first cyclone separator air inlet 3-1 respectively, and cyclone separator 3 is provided with the first cyclone separator air inlet 3-1, the second cyclone separator exhaust outlet, the 3rd green liquor outlet, the 4th hopper spray head 3-4.Be vented the solid particle in cyclone separator 3 in further removal gas and drop; Vortex finder 7 connects the second vortex finder outlet 3-2 and entrainment trap import 4-1, entrainment trap 4 is provided with entrainment trap air inlet 4-1, entrainment trap exhaust outlet 4-2, condensate water outlet 4-3, and ripple folded plate type entrainment trap 4 makes the drop in gas be caught by paving to separate.
Entrainment trap blast pipe 8 respectively with entrainment trap exhaust outlet 4-2, be vented air-introduced machine 5 and be connected, exhaust air-introduced machine blast pipe 9 connects air-introduced machine 5 and combustion furnace, exhaust air-introduced machine 5 makes dissolving tank blast pipe produce tiny structure, and (-50 ~-20Pa, discharges gas in dissolving tank smoothly; Send alkali collection special boiler to burn the exhaust containing reproducibility sulfide gas (TRS) simultaneously.
Feeding spraying pump water inlet pipe 10 exports 1-2 with the second green liquor on green liquor dissolving tank 1 respectively, feeding spraying pump 2 is connected, and feeding spraying pump 2 upper outlet connects spray header 11, rear section two-way, and run in tracheae spray head 6-1 on a road; Another road meets the 4th hopper spray head 3-4 of cyclone separator 3.
Green liquor pipe 12 is connected with the 3rd green liquor import 1-3 on green liquor dissolving tank 1, enters the green liquor of the 4th hopper spray head 3-4, the dust that separated and dissolved goes out, then enters the 3rd green liquor import 1-3 of green liquor dissolving tank green liquor 1 through green liquor pipe 12.
Condensate pipe 13 exports 4-3 be connected with the 4th condensate water import 1-4, condensate water respectively, and the condensation-water drain 4-3 of entrainment trap 4 bottom connects condensate pipe 12, then meets the 4th condensate water import 1-4 of green liquor dissolving tank 1.The condensate water that entrainment trap 4 is collected enters green liquor dissolving tank by condensate pipe 12.
PLC control device 15 is by Temperature displaying/control unit 15-1, and pressure display/control unit 15-2 forms.
PLC control device 15 is described in detail as follows: PLC control device 15 to be monitored temperature, pressure and motor speed by programmable logic controller (PLC) and host computer or regulated and controled, as shown in dotted line in figure mono-.Be specially:
The variable-frequency motor 2-1 of feeding spraying pump 2 is connected with frequency converter 2-2, and PLC control device 15 is made up of programmable logic controller (PLC) and host computer, containing display/control unit 15-1, pressure display/control unit 15-2.Frequency converter 2-2 is connected with Temperature displaying/control unit 15-1; Temperature sensor 14-1 is connected with vortex finder 7, Temperature displaying/control unit 15-1 respectively.Temperature displaying and control unit 15-1, the gas temperature after cyclone separator 3 is detected by the temperature sensor 14-1 at vortex finder 7 place, signal feeds back to PLC by cable, the frequency converter 2-2 of frequency conversion feeding spraying pump 2 is output control signals to after PLC computing, frequency converter 2-2 is by regulating the rotating speed of variable-frequency motor 2-1, realize the pumped (conveying) medium flow changing feeding spraying pump 2, control flow check is through blast pipe spray head 6-1, and the green liquor amount of cyclone separator 3 the 4th hopper spray head 3-4, thus ensure that the gas temperature after spray is not higher than 80 DEG C.Gas temperature numerical value in vortex finder 7 shows at host computer.
PLC control device (15) is made up of programmable logic controller (PLC) and host computer, containing display/control unit 15-1, pressure display/control unit 15-2, the variable-frequency motor 5-1 on exhaust air-introduced machine 5 show with frequency converter 5-2, pressure respectively/and control unit 15-2 is connected; Frequency converter 2-2 is connected with Temperature displaying/control unit 15-1; Temperature sensor 14-1 is connected with vortex finder 7, Temperature displaying/control unit 15-1 respectively.Pressure transmitter 14-2 shows with dissolving tank blast pipe 6, pressure respectively/and control unit 15-2 is connected, pressure display and control unit 15-2, the pressure of the first dissolving tank exhaust outlet 1-1 is detected by pressure transmitter 14-2, signal feeds back to PLC by cable, the frequency converter 5-2 of exhaust air-introduced machine 5 is output control signals to after PLC computing, frequency converter 5-2 is by regulating the rotating speed of variable-frequency motor 5-1, change the pressure head of exhaust air-introduced machine 5, realize controlling dissolving tank blast pipe 6 pressure at tiny structure (-50 ~-20Pa).The gas pressure numerical value at dissolving tank blast pipe 6 place shows at host computer.
Claims (4)
1. a green liquor dissolving tank exhaust recovery device, it comprises green liquor dissolving tank (1), cyclone separator (3), entrainment trap (4), exhaust air-introduced machine (5), entrainment trap blast pipe (8), air-introduced machine blast pipe (9), feeding spraying pump water inlet pipe (10), spray header (11), green liquor pipe (12), condensate pipe (13), temperature sensor (14-1), it is characterized in that: green liquor dissolving tank (1) is provided with the first dissolving tank exhaust outlet (1-1), second green liquor outlet (1-2), 3rd green liquor import (1-3), 4th condensate water import (1-4), dissolving tank blast pipe (6) respectively with the first dissolving tank exhaust outlet (1-1), first cyclone separator air inlet (3-1) is connected, be provided with three layers in dissolving tank blast pipe (6) to give a dinner of welcome, cooling blast pipe spray head (6-1), feeding spraying pump water inlet pipe (10) exports (1-2) with the second green liquor on green liquor dissolving tank (1) respectively, feeding spraying pump (2) is connected, first variable-frequency motor (2-1) respectively with feeding spraying pump (2), first frequency converter (2-2) is connected, first frequency converter (2-2) is connected with Temperature displaying/control unit (15-1), spray header (11) respectively with cyclone separator (3), feeding spraying pump (2) is connected, green liquor pipe (12) is connected with the 3rd green liquor import (1-3) on green liquor dissolving tank (1), green liquor pipe (12) exports (3-3) with the 3rd green liquor on cyclone separator (3) and is connected, vortex finder (7) connects the second vortex finder outlet (3-2) and entrainment trap import (4-1), temperature sensor (14-1) respectively with vortex finder (7), Temperature displaying/control unit (15-1) is connected, pressure transmitter (14-2) respectively with dissolving tank blast pipe (6), pressure display/control unit (15-2) is connected, condensate pipe (13) respectively with the 4th condensate water import (1-4), condensate water outlet (4-3) is connected, entrainment trap (4) is provided with entrainment trap air inlet (4-1), entrainment trap exhaust outlet (4-2), condensate water outlet (4-3), entrainment trap blast pipe (8) respectively with entrainment trap exhaust outlet (4-2), exhaust air-introduced machine (5) is connected, air-introduced machine blast pipe (9) connects air-introduced machine (5) and combustion furnace, second variable-frequency motor (5-1) respectively with the second frequency converter (5-2), pressure display/control unit (15-2) is connected.
2. a kind of green liquor dissolving tank exhaust recovery device according to claim 1, is characterized in that: on cyclone separator (3), be provided with the first cyclone separator air inlet (3-1), the second cyclone separator exhaust outlet (3-2), the 3rd green liquor outlet (3-3), the 4th hopper spray head (3-4).
3. a kind of green liquor dissolving tank exhaust recovery device according to claim 1, is characterized in that: described entrainment trap (4) is ripple folded plate type, flow velocity operating mode: 8-9.6m/s.
4. a kind of green liquor dissolving tank exhaust recovery device according to claim 1, it is characterized in that: PLC control device (15) is made up of programmable logic controller (PLC) and host computer, containing Temperature displaying/control unit (15-1), pressure display/control unit (15-2), the second variable-frequency motor (5-1) in exhaust air-introduced machine (5) shows/control unit (15-2) with the second frequency converter (5-2), pressure respectively and is connected; First frequency converter (2-2) is connected with Temperature displaying/control unit (15-1); Temperature sensor (14-1) is connected with vortex finder (7), Temperature displaying/control unit (15-1) respectively.
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| CN203635019U (en) * | 2014-01-13 | 2014-06-11 | 苏州克利亚环保科技有限公司 | Spray paint waste gas treatment device |
| CN203935751U (en) * | 2014-07-07 | 2014-11-12 | 中国轻工业武汉设计工程有限责任公司 | A kind of green liquor dissolving tank exhaust recovery device |
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2014
- 2014-07-07 CN CN201410323548.XA patent/CN104083978B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005164115A (en) * | 2003-12-02 | 2005-06-23 | Sawa Techno:Kk | Combustion gas treatment method for refuse incineration installation and its device |
| CN201664566U (en) * | 2010-04-01 | 2010-12-08 | 黄海涛 | Large powder bank clearing device |
| CN202527013U (en) * | 2012-04-12 | 2012-11-14 | 湖南湘达环保工程有限公司 | Wet dust collection system for tail gas from salt drying furnace |
| CN203635019U (en) * | 2014-01-13 | 2014-06-11 | 苏州克利亚环保科技有限公司 | Spray paint waste gas treatment device |
| CN203935751U (en) * | 2014-07-07 | 2014-11-12 | 中国轻工业武汉设计工程有限责任公司 | A kind of green liquor dissolving tank exhaust recovery device |
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| CN104083978A (en) | 2014-10-08 |
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