CN106975335A - A kind of sodium base spray dry desulfurization system - Google Patents

A kind of sodium base spray dry desulfurization system Download PDF

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Publication number
CN106975335A
CN106975335A CN201710233693.2A CN201710233693A CN106975335A CN 106975335 A CN106975335 A CN 106975335A CN 201710233693 A CN201710233693 A CN 201710233693A CN 106975335 A CN106975335 A CN 106975335A
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compressed air
lye
injection
lye tank
spray dry
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暴辰生
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Shandong Treasure Environmental Protection Technology Co Ltd
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Priority to CN201710233693.2A priority Critical patent/CN106975335A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/78Liquid phase processes with gas-liquid contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/16Evaporating by spraying
    • B01D1/18Evaporating by spraying to obtain dry solids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/02Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/501Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/502Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific solution or suspension
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/501Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/79Injecting reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/30Alkali metal compounds
    • B01D2251/304Alkali metal compounds of sodium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/60Inorganic bases or salts
    • B01D2251/604Hydroxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2257/00Components to be removed
    • B01D2257/30Sulfur compounds
    • B01D2257/302Sulfur oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

Abstract

The present invention relates to environmental technology field, a kind of sodium base spray dry desulfurization system, including desulfurizer, alkali lye feeding mechanism, pneumatic ash conveying plant, compressed air supply system and control device are disclosed.Sodium base spray dry desulfurization system of the present invention solves fouling and blocking, rich solution in existing Wet Flue Gas Desulfurization Technique and is difficult to handle, corrode and wear and tear and formed the insoluble problem such as white cigarette mist, simultaneously, also pulping process complexity, the one-time investment for solving calcium base spray dry desulfurization technique are high, the problems such as pump, pipeline and sprayer unit are blocked.In addition, when in use, sodium base spray dry desulfurization system desulfuration efficiency of the present invention is high, floor space is small, and water saving, energy-saving effect are notable.

Description

A kind of sodium base spray dry desulfurization system
Technical field
The present invention relates to environmental technology field, more particularly to a kind of sodium base spray dry desulfurization system.
Background technology
In process of production, in various stoves, kiln during the fuel of combustion of sulfur, sulphur in fuel at high temperature with air Following reaction occurs for oxygen:
S+O2=S O2Generate sulfur dioxide (S O2)。
Sulfur dioxide is the toxic and harmful gas for seriously endangering human health.In the prior art, in order to eliminate titanium dioxide Harm of the sulphur to human health, is usually removed (abbreviation desulfurization) to the sulfur dioxide in flue gas in the following ways:Utilize Some alkaline matters (such as calcium oxide or magnesia), calcium hydroxide (Ca (OH) is made by adding water2) or magnesium hydroxide (Mg (OH)2) slurries, then squeeze into absorption tower through pump and fully contacted with flue gas, make the titanium dioxide in the nitride sulphur flue gas in flue gas Sulphur carries out reaction generation MgSO with the calcium hydroxide or magnesium hydroxide in slurries3Or CaSO3, so as to remove the titanium dioxide in flue gas Sulphur.This technology is currently the agent technology of desulfurization, also known as Wet Flue Gas Desulfurization Technique, and about more than 90% desulfurization tolerance uses this The technology of kind.But this technology has some disadvantages:
Fouling and blocking:In this flue gas desulfurization, equipment and defeated slurries pipeline are it occur frequently that fouling and blocking, serious shadow The normal work of devulcanizer is rung, even results in that equipment is entirely ineffective to scrap.
The processing of rich solution:The rich solution (containing waste liquids such as flue dust, sulfate, sulphite) washed after sulfur dioxide is if handle not In time, the pollution of water body is caused simultaneously, the rich solution of recycling causes the decline of desulfuration efficiency also because of its alkalescence reduction.
Corrosion and abrasion:During coal burning in addition to sulfur dioxide is generated, a small amount of sulfur trioxide (SO is also generated3), cigarette The concentration of sulfur trioxide is 10~40ppm in gas, due to typically containing water (4%~12%), the sulfur trioxide of generation in flue gas Sulfuric acid mist is formed in moment.When the temperature is low, sulfuric acid mist condenses into sulfuric acid and is attached on the inwall of equipment, or is dissolved in washing In liquid.Here it is wet absorption tower and about equipment corrosion quite serious main cause.
Form white cigarette mist:Wet absorption tower in the process of running, is also easy to produce " mist " that particle diameter is 10~60 μm." mist " not only Containing moisture, it is also dissolved with sulfuric acid, sulfate, sulfur dioxide etc., if do not properly settled, " mist " of any entrance chimney, actual Exactly sulfur dioxide is discharged into air again, is the important sources of the formation such as PM2.5 in atmospheric haze.
Also have lime slurry spray dry desulfurization method (calcium base spray dry desulfurization method) at present, although this method overcomes Some shortcomings of sulfur method are stated, but because of pulping process complexity, one-time investment height in its technique, pump, pipeline and spraying dress The reasons such as blocking are put, are not also widely used.
The content of the invention
(1) technical problem to be solved
The present invention provides a kind of sodium base spray dry desulfurization system, to solve in existing Wet Flue Gas Desulfurization Technique fouling and stifled Plug, rich solution are the problem of be difficult to handle, corrode and wear and tear and formed white cigarette mist and lime slurry spray dry desulfurization method its slurrying Complex process, one-time investment are high, the problem of pump, pipeline and sprayer unit are blocked.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of sodium base spray dry desulfurization system, the system bag Desulfurizer, alkali lye feeding mechanism, pneumatic ash conveying plant, compressed air supply system and control device are included,
The middle and upper part that the desulfurizer is included in sealed housing, the housing is provided with multiple two-fluid shower nozzles, institute The lower end for stating housing is connected with ash bucket, the housing and is provided with flue, and the air inlet of the flue is through described The side wall of the lateral wall of the lower sides of housing and the flue and the housing is tightly connected, and the flue goes out Gas port is arranged on the top of the two-fluid shower nozzle and with being connected in the housing, is additionally provided with the lower sides of the housing SO is provided with exhanst gas outlet, the exhanst gas outlet2Sensor,
The Pneumatic ash conveying component includes being arranged on the Pneumatic ash conveying pipeline below the ash bucket,
The alkali lye feeding mechanism is included at least one lye tank for storing sodium hydrate aqueous solution, the lye tank Liquid level sensor is provided with, the lye tank is connected by transfer line with the liquid-inlet of the two-fluid shower nozzle, described defeated Frequency conversion lye pump is provided with liquid pipe line,
The compressed air supply system includes air compressor and compressed air reservoir, the compressed air reservoir Connected respectively by pipeline with the air intlet, Pneumatic ash conveying pipeline and lye tank of the two-fluid shower nozzle,
The control device and the SO2Sensor, liquid level sensor and frequency conversion lye pump are electrically connected.
Further, the lye tank is two, and two lye tanks are standby each other, and liquid level is provided with each lye tank Sensor, the control device is respectively connected with the liquid level sensor in each lye tank.
Further, the ash bucket is in infundibulate, and the ash bucket includes being arranged in several below the housing, each The discharging opening of the ash bucket is provided with star-shaped discharge valve,
The Pneumatic ash conveying pipeline includes the Pneumatic ash conveying Trunk Line connected with the compressed air reservoir and is connected The Pneumatic ash conveying by-pass line of the discharging opening of each ash bucket, the Pneumatic ash conveying Trunk Line is connected simultaneously with the Pneumatic ash conveying by-pass line Compressed air is conveyed into the Pneumatic ash conveying by-pass line.
Further, it is provided with conical fairing cap above the gas outlet of the correspondence flue in the housing.
Further, upper and lower two layers of flow straightening grid is provided with the upper space of the housing, the two-fluid shower nozzle is set Put between two layers of flow straightening grid;
The jet of the two-fluid shower nozzle is set towards top.
Further, the transfer line includes the injection alkali lye Trunk Line connected with the lye tank and is connected to institute Many injection branch road alkali liquor pipes on injection alkali lye Trunk Line are stated,
Connecting the pipeline of the two-fluid shower nozzle and the compressed air reservoir includes and the compressed air reservoir The injection compressed air Trunk Line of connection and many injection branch roads compression being connected with the injection compressed air Trunk Line are empty Tracheae,
The air inlet of each two-fluid shower nozzle connects short tube and the injection branch road compressed air by compressed air Pipe is connected, and the liquid-inlet of each two-fluid shower nozzle connects short tube by feed flow and connected with the injection branch road alkali liquor pipe.
Further, the injection alkali lye Trunk Line is connected by lye tank supply pipe before pump respectively with two lye tanks, Lye tank feed flow switch valve before pump is provided with before every pump on lye tank supply pipe, the frequency conversion lye pump is arranged on institute State on injection alkali lye Trunk Line.
Further, in addition to detergent line, the detergent line includes clear water Trunk Line, and the clear water Trunk Line is divided into Upper and two alkali lye are managed in three road outlet pipes, respectively clear water cleaning pipe, two lye tank clear water water injection pipes, the clear water cleaning Case clear water water injection pipe is respectively arranged with the water injection valve of control water conduction,
The delivery port of clear water cleaning pipe is connected with the alkali lye Trunk Line that sprays, two lye tank clear water water injection pipes Delivery port is corresponded with two lye tanks and connected.
Further, the outlet of the compressed air reservoir is provided with the main pressure-reducing valve of compressed air and compressed air master Switch valve,
The inlet end of the injection branch road compressed air hose is provided with injection compressed air bypass valve and injection branch road compression Air reducing valve,
The compressed air reservoir is connected by lye tank compressed air stirring pipe with the lye tank, the lye tank Lye tank stirring compressed air pressure-reducing valve and lye tank stirring air pressure switch valve are provided with compressed air stirring pipe;
The compressed air reservoir is connected by Pneumatic ash conveying compressed-air line with the Pneumatic ash conveying pipeline, described Pneumatic ash conveying pulse of compressed air valve and Pneumatic ash conveying compressed air pressure-reducing valve are provided with Pneumatic ash conveying compressed-air line.
Further, the control device be HNI touch-screen microprocessors, the HNI touch-screens microprocessor with it is described SO2Sensor, the frequency conversion lye pump are electrically connected and according to SO2The feedback signal of sensor controls the frequency conversion lye pump Rotating speed,
The HNI touch-screens microprocessor is connected with the liquid level sensor, and the HNI touch-screens microprocessor is also connected with Sound light crossing-signal, the HNI touch-screens microprocessor is according to the feedback signal of the liquid level sensor to the sound and light alarm Device sends control instruction.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the following advantages that:The sodium base spray dry desulfurization system that the present invention is provided, profit With sodium hydrate aqueous solution as desulfurizing agent, and sodium hydrate aqueous solution and high pressure air are mixed using two-fluid shower nozzle Sprayed afterwards from the nozzle of two-fluid shower nozzle, because there is larger speed difference, the height of high flow between air-flow and liquid stream during ejection Pressure compressed air tears up the liquid film in liquid flow, and moment makes the huge micron order drop of sodium hydrate aqueous solution quantity of formation, The micron order sodium hydrate aqueous solution drop of enormous amount has great specific surface area, the sulfur dioxide in flue Chemistry hair occurs with ultra-fine sodium hydrate aqueous solution drop rapidly should generate microgranular sodium sulfite or sodium sulphate drop;It is microgranular Sodium sulfite or sodium sulphate drop continue to run in housing with flue gas, and drying forms solid particle shape under high-temperature flue gas effect Sodium sulfite or sodium sulphate.
Sodium base spray dry desulfurization system of the present invention is compared with conventional wet desulfurization technology:Due to water-soluble using sodium hydroxide Liquid does not result in equipment and liquid-transport pipe-line fouling and obstruction as desulfurizing agent;Because sulfur dioxide and ultra-fine sodium hydroxide are water-soluble The final product of liquid drop is solid particle shape sodium sulfite or sodium sulphate, so rich solution will not be produced, it is to avoid rich solution processing Trouble;Hair can also occur with ultra-fine sodium hydrate aqueous solution drop and answer final product to be microgranular sulphur for sulfur trioxide in flue gas Sour sodium, so sulfur trioxide is solved in low temperature, the problem of sulfuric acid droplet corrodes and worn and torn to equipment inner wall;Hydrogen of the present invention Aqueous solution of sodium oxide drop is atomized rear particle diameter and reaches micron order, so unreacted sodium hydroxide solution drop is in later stage high temperature cigarette It can be also oven-dried in the presence of gas, simultaneously because solubility of the sodium hydroxide in water is high, reach more than 50%, therefore its solution In desulfurization, the consumption of solution is considerably less, so sodium base spray dry desulfurization system of the present invention will not also produce asking for white cigarette mist Topic.
Sodium base spray dry desulfurization system of the present invention is compared with lime slurry spray drying Wet Flue Gas Desulfurization Technique:Sodium hydroxide The aqueous solution is as desulfurizing agent, and it obtains technique than simple, reduces production cost, and sodium hydrate aqueous solution will not produce pump, The problem of pipeline and spray assembly block.
Sodium base spray dry desulfurization system of the present invention solves fouling and blocking, rich solution in existing desulfurization technology and is difficult to locate The insoluble problem such as reason, corrosion and abrasion and formation white cigarette mist;Meanwhile, with calcium base spray dry desulfurization process phase Than pulping process complexity, the one-time investment for solving calcium base spray dry desulfurization technique are high, and pump, pipeline and sprayer unit are stifled The problems such as plug.In addition, when in use, sodium base spray dry desulfurization system of the present invention is compared than other desulfurization methods, floor space Small, desulfuration efficiency is high, and water saving, energy-saving effect are notable.
Except it is described above present invention solves the technical problem that, constitute technical scheme technical characteristic and have this Outside the advantage that the technical characteristic of a little technical schemes is brought, what other technical characteristics of the invention and these technical characteristics were brought Advantage, will be further illustrated with reference to accompanying drawing.
Brief description of the drawings
Fig. 1 is the structural representation of sodium base spray dry desulfurization system of the embodiment of the present invention;
Fig. 2 is Fig. 1 A-A sectional views;
Fig. 3 is Fig. 1 B-B sectional views;
Fig. 4 is Fig. 1 C-C sectional views;
Fig. 5 is the mounting structure figure of the two-fluid shower nozzle of sodium base spray dry desulfurization system of the embodiment of the present invention;
Fig. 6 is the control system schematic diagram of sodium base spray dry desulfurization system of the embodiment of the present invention.
In figure:1- supporting legs, 2- Pneumatic ash conveying Trunk Lines, 3- star-shaped discharge valves, 4- ash buckets, 5- exhanst gas outlets, 6- housings, 7- Flue, 8- lower floors flow straightening grid, 9- injection branch road alkali liquor pipes, 10- feed flows connection short tube, 11- two-fluid shower nozzles, 12- sprays Penetrate branch road compressed air hose, 13- upper stratas flow straightening grid, 14- fairing cap pillars, 15- fairing caps, 16- top covers, 17- injection branch roads Compressed air pressure-reducing valve, 18- injection alkali lye bypass valves, 19- injection compressed air bypass valves, 20- injection compressed air Trunk Lines, 21- injection alkali lye Trunk Lines, the main pressure-reducing valve of 22- compressed airs, 23- compressed air main switching valves, 24- compressed air reservoirs, 25- air compressor export pipelines, 26- air compressors, 27- Pneumatic ash conveying by-pass lines, the decompression of 28- Pneumatic ash conveyings compressed air Valve, 29- Pneumatic ash conveying pulse of compressed air valves, 30- Pneumatic ash conveying compressed-air lines, the lye tanks of 31- second stirring compression is empty Exhaust switch valve, the lye tanks of 32- first stirring air pressure switch valve, the lye tanks of 33- second stirring compressed air pressure-reducing valve, 34- First lye tank stirs compressed air pressure-reducing valve, and 35- the first lye tank compressed air stirring pipes, the lye tanks of 36- second compression is empty Gas agitating pipe, 37- clear water cleaning pipe, 38- clear water purge valves, 39- the first lye tank clear water water injection valves, the lye tanks of 40- first are clear Water water injection pipe, 41- the second lye tank clear water water injection valves, 42- the second lye tank clear water water injection pipes, the lye tanks of 43- first, 44- First alkali lye before first lye tank feed pipe before two lye tanks, 45- clear water Trunk Lines, 46- frequency conversion lye pumps, 47- pumps, 48- pumps Second lye tank feed flow switch valve, 51- compressed airs before second lye tank feed pipe, 50- pumps before case feed flow switch valve, 49- pumps Connect short tube, 52- the first lye tank liquid level sensors, 53- the first liquid level sensor signal wires, 54-SO2Sensor, 55-SO2Pass Sensor signal line, 56-HNI touch-screen microprocessors, the audible-visual annunciators of 57- first, the audible-visual annunciators of 58- second, 59- power supplys, 60- frequency converters, 61- the second liquid level sensor signal wires, 62- the second lye tank liquid level sensors.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is A part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people The every other embodiment that member is obtained on the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected;Can To be mechanical connection or electrical connection;Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in invention.
In addition, in the description of the invention, unless otherwise indicated, " multiple ", " many ", " multigroup " be meant that two or Two or more, " several ", " some ", " some groups " are meant that one or more.
As shown in figure 1, sodium base spray dry desulfurization system provided in an embodiment of the present invention, the system is filled including desulfurization Put, alkali lye feeding mechanism, pneumatic ash conveying plant, compressed air supply system and control device.
The desulfurizer includes housing 6, and the housing 6 is rectangular apparatus wall box, the top surrounded by four sides steel plate The closing space of lid 16 and multiple bottom ash buckets 4 composition.Housing 6 is fixed by supporting leg 1 and supported.The middle and upper part of the housing 6 Multiple two-fluid shower nozzles 11 are disposed with, it is circular flue 7, the fume pipe that the inside center of housing 6, which is provided with section, The air inlet in road 7 is through the lower sides of the housing 6 and the side wall of the lateral wall of the flue 7 and the housing 6 is close Envelope connection, the gas outlet of the flue 7 is arranged on the top of the two-fluid shower nozzle 11 and connected with the enclosure interior. The lower sidewall of the housing 6, which is provided with exhanst gas outlet 5, the exhanst gas outlet 5, to be provided with for detecting that desulfurizer is handled The SO of the sulfur dioxide concentration in flue gas afterwards2Sensor 54.It is understood that the exhanst gas outlet 5 of the lower sidewall of housing 6 is used Flue gas feeding subordinate sack cleaner after by desulfurization carries out dust removal process.
The pneumatic ash conveying plant includes being arranged on the Pneumatic ash conveying pipeline below the ash bucket.Ash bucket 4 is shaped as Lou Bucket shape, the discharging opening of infundibulate ash bucket 4 is provided with star-shaped discharge valve 3.(star-shaped discharge valve 3 can realize ash bucket 4 and sky in housing Between sealing simultaneously again the dust in ash bucket 4 can smoothly be discharged) the Pneumatic ash conveying pipeline include by Pneumatic ash conveying compression Pneumatic ash conveying Trunk Line 2 that air line 30 is connected with compressed air reservoir 24 and the respectively discharging opening with multiple ash buckets 4 Many Pneumatic ash conveying by-pass lines 27 being connected, many Pneumatic ash conveying by-pass lines 27 are connected with the Pneumatic ash conveying Trunk Line 2. The function of the pneumatic ash conveying plant is the feed bin that the ash for discharging star-shaped discharge valve 3 is transported to distal end.It is to be appreciated that, in order to Control to be provided with Pneumatic ash conveying compression sky on the compressed air on Pneumatic ash conveying pipeline, the Pneumatic ash conveying compressed-air line 30 Gas pulse valve 29 and Pneumatic ash conveying compressed air pressure-reducing valve 28.
The alkali lye feeding mechanism includes setting at least one lye tank of storage sodium hydrate aqueous solution, the lye tank Liquid level sensor is equipped with, the lye tank is connected by transfer line with the liquid-inlet of the two-fluid shower nozzle 11, described defeated Frequency conversion lye pump 46 is provided with liquid pipe line.Lye tank is used for configuring and storing sodium hydrate aqueous solution, and liquid level sensor can The liquid level in lye tank is detected, and signal is sent to control device, frequency conversion lye pump 46 being capable of giving according to control device The signal timely adjustment gone out is supplied to the alkali lye amount of two-fluid shower nozzle.
The compressed air supply system mainly includes compressed air reservoir 24, air compressor 26, and the compression is empty Gas air accumulator 24 passes through respectively with the compressed air inlet of the two-fluid shower nozzle 11, Pneumatic ash conveying Trunk Line 2 and lye tank Pipeline is connected.The one side of compressed air reservoir 24 is that two-fluid shower nozzle 11 provides the compressed air needed, meanwhile, also it is strength Defeated grey Trunk Line 2 provides wind-force and blows out dust fallen into ash bucket etc. by compressed air;Compressed air is transported to lye tank Effect be in order to stir the liquid in lye tank, to promote the sodium hydroxide lye in lye tank to be well mixed.
The control device and the SO2Sensor 54, liquid level sensor and frequency conversion lye pump 46 are electrically connected.Control Device processed can be according to SO2The sulfur dioxide concentration that sensor 54 is detected controls the operating speed of frequency conversion lye pump 46 as feedback signal Degree, so that the consumption of intelligent control alkali lye, realizes the reasonable utilization of alkali lye, reduces production cost;Control device also has simultaneously The liquid level signal transmitted according to liquid level sensor is sent out instruction, reminds the change of liquid level in operating personnel's lye tank, so that Operating personnel are facilitated to carry out corresponding operating.
The present embodiment sodium base spray dry desulfurization system, by the use of sodium hydrate aqueous solution as desulfurizing agent, and utilizes double fluid Body shower nozzle 11 will sodium hydrate aqueous solution and high pressure air mix after sprayed from the nozzle of two-fluid shower nozzle, during ejection because There is larger speed difference between air-flow and liquid stream, swiftly flowing high pressure air tears up the liquid film in liquid flow, moment Make the micron order drop that sodium hydrate aqueous solution quantity of formation is huge, the micron order sodium hydrate aqueous solution drop tool of enormous amount There is great specific surface area, the sulfur dioxide in flue is concurrent with ultra-fine sodium hydrate aqueous solution drop contact rapidly Biochemical hair should generate microgranular sodium sulfite or sodium sulphate drop;Microgranular sodium sulfite or sodium sulphate drop continues with flue gas Run in housing, the moisture under high-temperature flue gas effect in ultra-fine sodium hydrate aqueous solution drop evaporates rapidly, surplus materials Drying forms solid particle shape sodium sulfite or sodium sulphate particulate.Solid particle shape sodium sulfite or a sodium sulphate part are with flue gas Entered by the exhanst gas outlet 5 on housing 6 and be removed after subordinate's sack cleaner, a part is fallen into the ash bucket 4 of bottom, And go out through Pneumatic ash conveying pipelined outside system.
Meanwhile, the setting flue 7, one side cigarette inside housing 6 of the present embodiment sodium base spray dry desulfurization system Feed channel 7 can realize that flue gas enters after case top from the bottom of housing 6, be arranged again from the bottom of housing 6 after reverse deceleration Go out, slow down the flowing velocity of flue gas, promote the reactive absorption of the sulfur dioxide and sodium hydrate aqueous solution in flue gas;Simultaneously Flue 7 can maintain the state of high temperature in housing 6, promote microgranular sodium sulfite to provide certain heat in housing 6 Or sodium sulphate drop flashes to solid-state.
The present embodiment sodium base spray dry desulfurization system, as desulfurizing agent, is taken off using sodium hydrate aqueous solution relative to other Sulphur agent, solubility of the sodium hydroxide in water it is high (such as at 20 DEG C, 1 kg of water can be completely dissolved 1.09 kilograms of sodium hydroxides, And at 20 DEG C, 1 kg of water is only completely dissolved 0.0016 kilogram of calcium hydroxide, the two solubility differs 630 times), it is possible to The sodium hydrate aqueous solution of high concentration is as desulfurizing agent required for configuration, and the configuration in the solution used than other sulfur methods makes Water consumption is less, configuration process is simple, and cost is relatively low.
The present embodiment sodium base spray dry desulfurization system is compared with conventional wet desulfurization technology:Due to using sodium hydroxide water Solution does not result in equipment and sets liquid-transport pipe-line fouling and obstruction as desulfurizing agent;Due to sulfur dioxide and ultra-fine sodium hydroxide water The final product of solution droplets is solid particle shape sodium sulfite or sodium sulphate, so rich solution will not be produced, it is to avoid at rich solution The trouble of reason;Hair can also occur with ultra-fine sodium hydrate aqueous solution drop and answer final product to be microgranular for sulfur trioxide in flue gas Sodium sulphate, so sulfur trioxide is solved in low temperature, the problem of sulfuric acid droplet corrodes and worn and torn to equipment inner wall;The present invention Sodium oxide molybdena is water-soluble because solubility is high, and solution usage is few, while drop, which is atomized rear particle diameter, reaches micron order, so unreacted Sodium hydroxide solution drop can also be dried rapidly in the presence of later stage high-temperature flue gas, so sodium base of the present invention spray drying is de- The problem of sulphur system never produces white cigarette mist.
Sodium base spray dry desulfurization system of the present invention is compared with lime slurry spray drying Wet Flue Gas Desulfurization Technique:Sodium hydroxide The aqueous solution is as desulfurizing agent, and it obtains technique than simple, reduces production cost, and sodium hydrate aqueous solution will not produce pump, The problem of pipeline and spray assembly block.
As shown in figure 1, as one embodiment of the present of invention, the head clearance certain distance of flue 7 is provided with circle Conical flow guiding lid 15, the fairing cap 15 is welded to connect with the top of flue 7 by fairing cap pillar 14.
It is understood that flue gas uniform and stable can be guided to around flue by fairing cap 15, it is easy to cigarette Gas uniform and stable flows downwardly to the bottom of housing 6.
As shown in figure 1, in order to further realize the steady of flue gas, the middle and upper part of the housing 6 is provided with two layers of honeycomb screen Grid, respectively upper strata flow straightening grid 13 and lower floor's flow straightening grid 8, upper strata flow straightening grid 13 and lower floor's flow straightening grid 8 are by steel The grid with certain length that plate is welded, its outside and the inwall of housing 6 are welded to connect.
Multiple two-fluid shower nozzles 11 are arranged between upper strata flow straightening grid 13 and lower floor's flow straightening grid 8, specific setting side Formula is as shown in Figure 1,3:Transfer line and injection gas transmission line are provided between upper strata flow straightening grid 13 and lower floor's flow straightening grid 8, Wherein transfer line includes the injection alkali lye Trunk Line 21 connected with lye tank, the injection being connected on injection alkali lye Trunk Line 21 Branch road alkali liquor pipe 9, the feed flow connection short tube 10 being connected on injection branch road alkali liquor pipe 9, feed flow connection short tube 10 are ultimately connected to Alkali lye is transported in two-fluid shower nozzle 11 by the bottom of two-fluid shower nozzle 11;Spray the switch valve that alkali lye bypass valve 18 is the branch road; Injection gas transmission line include connected with compressed air reservoir injection compressed air Trunk Line 20, be connected to injection compressed air Injection branch road compressed air hose 12 on Trunk Line 20, the compressed air connection being connected on injection branch road compressed air hose 12 are short Pipe 51, compressed air connection short tube 51 is ultimately connected to the side of two-fluid shower nozzle 11 and delivers compressed air to two-fluid shower nozzle 11 It is interior, the decompression and switch valve of injection branch road compressed air pressure-reducing valve 17, injection compressed air bypass valve 19 for the branch road.
The jet of the two-fluid shower nozzle 11 is set towards top, namely:Two-fluid shower nozzle sprays alkali lye upwards, double fluid The bottom of body shower nozzle 11 is liquid-inlet and connects short tube 10 by feed flow and spray branch road alkali liquor pipe 9 to connect, the two-fluid The side of shower nozzle 11 (air inlet) connects short tube 51 by compressed air and injection branch road compressed air hose 12 is connected.Wherein, every Multiple two-fluid shower nozzles 11 can be installed on bar injection branch road alkali liquor pipe 9 and injection branch road compressed air hose 12, while spraying branch road Alkali liquor pipe 9 and injection branch road compressed air hose 12 are also constituted by many.
It should be noted that injection branch road compressed air pressure-reducing valve 17 and injection compressed air bypass valve 19 are arranged on injection The input of branch road compressed air hose 12, injection alkali lye bypass valve 18 is arranged on the input of injection branch road alkali liquor pipe 9, the spray Penetrating branch road compressed air pressure-reducing valve 17 and injection compressed air bypass valve 19 and injection alkali lye bypass valve 18 is used to adjust the branch road The spray regime of multiple two-fluid shower nozzles 11.Each injection branch road compressed air hose 12 passes through welding and injection compressed air Trunk Line 20 be connected, respectively injection branch road alkali liquor pipe 9 be connected by welding with spraying alkali lye Trunk Line 21.
It is understood that two-fluid shower nozzle is set by the way of being sprayed towards top, the hydrogen after atomization can be slowed down The flow velocity of sodium oxide molybdena drop, promotes the sulfur dioxide and sodium hydroxide drop reactive absorption in flue gas.
As shown in figure 1, as one embodiment of the present of invention, the lye tank includes two, it is respectively that four sides is stainless The rectangular box that steel plate is surrounded, bottom is closed by stainless steel plate, top is unlimited, is respectively defined as the first lye tank 43 and second It (is respectively the first liquid level sensor 52, the second liquid level sensor that liquid level sensor is provided with lye tank 44, each lye tank 62), the control device is respectively connected with the liquid level sensor in frequency conversion lye pump and each lye tank.
It is understood that lye tank is preferably two, it can be consumed in the sodium hydrate aqueous solution in a lye tank When complete, another lye tank is switched to, and new alkali lye is configured in the lye tank for consumed alkali lye, it is achieved thereby that sweetening process Be carried out continuously.
As shown in figure 1, as one embodiment of the present of invention, alkali lye is configured for convenience, the spraying of the present embodiment sodium base is dry Dry desulphurization system also includes clear water pipeline, and the detergent line includes clear water Trunk Line 45, and the clear water Trunk Line 45 leads to respectively The first lye tank clear water water injection pipe 40, the second lye tank clear water water injection pipe 42 are crossed into the first lye tank 43, the second lye tank 44 Water filling, and in order to realize on the control of current, the first lye tank clear water water injection pipe 40, the second lye tank clear water water injection pipe 42 It is respectively arranged with the first lye tank clear water water injection valve 39, the second lye tank clear water water injection valve 41.
Pass through the first lye tank compressed air stirring pipe 35, the second alkali in first lye tank 43, the second lye tank 44 respectively Liquid case compressed air stirring pipe 36 is passed through compressed air, and in order to control the circulation of compressed air that is passed through in each lye tank and The first lye tank stirring air pressure switch valve 32, the are provided with flow velocity, the first lye tank compressed air stirring pipe 35 The stirring of the second lye tank is provided with one lye tank stirring compressed air pressure-reducing valve 34, the second lye tank compressed air stirring pipe 36 Air pressure switch valve 31, the second lye tank stirring compressed air pressure-reducing valve 33.
As shown in figure 1, as a kind of arrangement of frequency conversion lye pump, frequency conversion lye pump 46 is arranged on injection alkali lye supervisor On line 21, injection alkali lye Trunk Line 21 is distinguished by the second lye tank feed pipe 49 before the first lye tank feed pipe 47, pump before pump Connected with the first lye tank 43, the second lye tank 44 and feed liquor, and in order to control the first alkali lye before the conducting of feed pipe, the pump It is respectively arranged with before case feed pipe 47, pump on the second lye tank feed pipe 49 before pump before the first lye tank feed flow switch valve 48, pump Second lye tank feed flow switch valve 50.
As shown in figure 1, cleaning alkali lye transfer pipeline and two-fluid shower nozzle 11 for convenience, clear water Trunk Line 45 is also set up There is the clear water connected with injection alkali lye Trunk Line 21 to clean on pipe 37, the clear water cleaning pipe 37 and be provided with clear water purge valve 38.
The compressed air supply system includes compressed air reservoir 24 and passes through air compressor export pipeline 25 There is provided to the compressed air reservoir 24 on the air compressor 26 of compressed air, the outlet line of compressed air reservoir 24 It is provided with the main pressure-reducing valve 22 of compressed air, compressed air main switching valve 23.Compressed air outlet pipeline is divided into three tunnels respectively to spray Penetrate compressed air Trunk Line 20, Pneumatic ash conveying compressed-air line 30, the first lye tank compressed air stirring pipe 35 and the second alkali Liquid case compressed air stirring pipe 36 provides compressed air.
As shown in fig. 6, the control device can be master element with HNI touch-screens microprocessor 56, SO2 sensors 54, First lye tank liquid level sensor 52, the second lye tank liquid level sensor 62 input the micro- place of HNI touch-screens by signal wire respectively Manage in device 56, after identified calculating, output control signal is to frequency converter 60, the first audible-visual annunciator 57 and the second audible-visual annunciator 58 implement control and alarm.Its operation principle is:If exporting SO2Sensor 54 measures the SO in smoke outlet flue gas after desulfurization2 When concentration value is higher than setting value, by exporting SO2Concentration signal is inputted HNI touch-screens microprocessor 56 by sensor signal lines 55 In, then the frequency converter 60 by control signal to frequency conversion lye pump, increases output frequency, improves turning for frequency conversion lye pump 46 Speed, reaches the flow for the alkali lye that increase alkali lye supply system is provided to two-fluid shower nozzle 11, final to realize reduction smoke outlet SO in flue gas after desulfurization2Concentration;If conversely, outlet SO2Sensor 54 measures the SO in outlet flue gas after desulfurization2Concentration value is low When setting value, by exporting SO2Sensor signal lines 55 input concentration signal in HNI touch-screens microprocessor 56, through meter Calculate processing and then send frequency converter 60 of the control signal to frequency conversion lye pump, reduce output frequency, reduction frequency conversion lye pump 46 Rotating speed, reaches the flow for reducing the alkali lye that alkali lye supply system is provided to spraying system, and final realize reduces the consumption of alkali lye, The use cost of reduction system.In addition, when the first lye tank 43 implements water filling, when clear water liquid level reaches setting position, the One audible-visual annunciator 57 sends sound and light signal, reminds operating personnel to close the first lye tank clear water water injection valve 39;In the second alkali lye When case 44 implements water filling, when clear water liquid level reaches setting position, the second audible-visual annunciator 58 sends sound and light signal, reminds operation Personnel close the second lye tank clear water water injection valve 41.When normal desulfurization works, if the first lye tank 43 is to two-fluid shower nozzle 11 When supplying alkali lye, when the sodium hydrate aqueous solution being stored in the first lye tank 43 is depleted to liquid level as little as setting value, first Audible-visual annunciator 57 sends sound and light signal, reminds operating personnel to close the first lye tank feed flow switch valve 48 before pump, opens before pump Second lye tank feed flow switch valve 50, is converted into the second lye tank 44 and supplies alkali lye to spraying system;Equally when the second lye tank 44 to two-fluid shower nozzle 11 supply alkali lye when, when the sodium hydrate aqueous solution being stored in the second lye tank 44, to be depleted to liquid level low During to setting value, the second audible-visual annunciator 58 sends sound and light signal, reminds operating personnel to close the second lye tank feed flow before pump and opens Valve 50 is closed, the first lye tank feed flow switch valve 48 before pump is opened, the first lye tank 43 is converted into and supplies alkali lye to spraying system.
In Fig. 6, label 53 refers to the first liquid level sensor signal wire, and 59 refer to power supply, and 61 refer to the second liquid level Sensor signal lines.
In summary, the present embodiment sodium base spray dry desulfurization system solve in existing desulfurization technology fouling and block, Rich solution is difficult to handle, corrode and wear and tear and formed the insoluble problem such as white cigarette mist.Meanwhile, with calcium base spray dry desulfurization work Process is compared, and pulping process complexity, the one-time investment for solving calcium base spray dry desulfurization technique are high, pump, pipeline and spray The problems such as mist device is blocked.In addition, when in use, the present embodiment sodium base spray dry desulfurization system is than other desulfurization method phases Than desulfuration efficiency is high, and floor space is small, and water saving, energy-saving effect are notable.
The concrete application embodiment of the present invention is given below
The present embodiment sodium base spray dry desulfurization system is used to handle air quantity for 260000m3/ h, flue-gas temperature is 165 DEG C, Amount of sulfur contenting in smoke is 750mg/Nm3Flue gas.The appearance and size of desulfurizer housing be length × width × height=8000mm × 8000mm×21000mm。
When it is implemented, alkali lye preparation is carried out first, in the first lye tank 43 and capacity that capacity is 12 cubic metres 800kg flaky sodium hydrate solids are delivered to be each in 12 cubic metres of the second lye tank 44, the first alkali lye is then separately turned on Case clear water water injection valve 39 and the second lye tank clear water water injection valve 41, clear water is filled to the first lye tank 43 and the second lye tank 44; Adding amount per case is 8 cubic metres, and when clear water filling reaches setting position, the first audible-visual annunciator 57 sends acousto-optic letter Number, remind operating personnel to close the first lye tank clear water water injection valve 39;When the second lye tank 44 implements water filling, when clear water liquid level When reaching setting position, the second audible-visual annunciator 58 sends sound and light signal, reminds operating personnel to close the second lye tank clear water note Water valve 41;Now, when the pressure tabular value on unlatching air compressor 26, the main pressure-reducing valve 22 of air to be compressed reaches setting, open Compressed air main switching valve 23 is opened, being then turned on the first lye tank stirring air pressure switch valve 32 (should be according to the when using first Liquid level rolling situation adjustment the first lye tank stirring compressed air pressure-reducing valve 34 reaches appropriate blender gas in one lye tank 43 Pressure), pneumatic stirring is carried out to the liquid in the first lye tank 43, treats flaky sodium hydrate solid all untill dissolving.Open Second lye tank stirring air pressure switch valve 31 (should be according to liquid level rolling situation adjustment in the second lye tank 44 when using first Second lye tank stirring compressed air pressure-reducing valve 33 reaches appropriate stirring air pressure), the liquid in the second lye tank 44 is carried out Pneumatic stirring, treats flaky sodium hydrate solid all untill dissolving.Now alkali lye preparation terminates.
During system life's work (if it is determined that first supplying alkali lye to two-fluid shower nozzle with the first lye tank 43), open the before pump One lye tank feed flow switch valve 48, closes the second lye tank feed flow switch valve 50 before pump, connects the power supply 59 of control device, opens When pressure tabular value on air compressor 26, the main pressure-reducing valve 22 of air to be compressed reaches setting, compressed air main switch is opened Valve 23.Each system of sodium base spray drying devulcanizer is set to be in normal operating conditions.Now, the high-temperature flue gas of sulfur-bearing is in air inducing Risen under the driving of machine by flue 7 and reach the top of flue 7, because of effect of inertia, high-temperature flue gas stream can hit setting Fairing cap 15 in the top of flue 7, makes high-temperature flue gas stream flow downward, and has certain length via welded steel plate The rectification of upper strata flow straightening grid 13 of grid, enables high-temperature flue gas stream to compare uniformly across by injection branch road alkali liquor pipe 9, feed flow company Connect short tube 10, two-fluid shower nozzle 11, injection branch road compressed air hose 12, injection branch road compressed air pressure-reducing valve 17, injection compression Air passage valve 19, injection alkali lye bypass valve 18, compressed air connection short tube 51, spraying system compressed air Trunk Line 20 and spray Penetrate the spraying system of the composition of alkali lye Trunk Line 21.
Under the driving of frequency conversion lye pump 46, sodium hydrate aqueous solution flows out from the first lye tank 43, through the first alkali before pump First lye tank feed flow switch valve 48, frequency conversion lye pump 46, injection alkali lye Trunk Line 21, injection branch before liquid case feed pipe 47, pump Reached after road alkali liquor pipe 9, feed flow connection short tube 10 in two-fluid shower nozzle 11;It is simultaneously defeated through air compressor 26, air compressor Go out the main pressure-reducing valve 22 of pipeline 25, compressed air reservoir 24, compressed air, compressed air main switching valve 23, injection compressed air High pressure air after Trunk Line 20, injection branch road compressed air hose 12, compressed air connection short tube 51 also reaches two-fluid In shower nozzle 11.The spray of sodium hydrate aqueous solution and high pressure air in two-fluid shower nozzle 11 after mixing from two-fluid shower nozzle 11 Sprayed at mouthful, because there is huge speed difference between air-flow and liquid stream during ejection, swiftly flowing high pressure air can be by liquid Liquid film in body stream is torn up, and moment makes the huge micron order drop of sodium hydrate aqueous solution quantity of formation, these enormous amounts Micron order drop forms uniform sodium hydrate aqueous solution fog-zone in injection region, when high-temperature flue gas passes through this piece fog-zone When, because the micron order sodium hydrate aqueous solution drop of enormous amount has great specific surface area, now, in high-temperature flue gas SO2Occur following chemically react with sodium hydroxide in ultra-fine sodium hydrate aqueous solution drop rapidly:
SO2+2NaOH→Na2SO3+H2O
Na2SO3+H2O+SO2→2NaHSO3
NaHSO3+NaOH→Na2SO3+H2O
Na2SO3+1/2O2→Na2SO4
End reaction thing is microgranular sodium sulfite or sodium sulphate drop.These drops continue to transport in device with flue gas OK, drying forms solid-state sodium sulfite or sodium sulphate particle under high-temperature flue gas effect, these solid-state sodium sulfites or sodium sulphate A part for particle is removed in the sack cleaner of rear class with cigarette ash, and another part falls into the ash bucket 4 of device bottom In, it is transported to through star-shaped discharge valve 3, Pneumatic ash conveying branch spool 27, Pneumatic ash conveying Trunk Line 2 in the ash silo of distal end.Pneumatic ash conveying The active force of system is through air compressor 26, air compressor export pipeline 25, compressed air reservoir 24, compressed air master Pressure-reducing valve 22, compressed air main switching valve 23, Pneumatic ash conveying compressed-air line 30, Pneumatic ash conveying compressed air pressure-reducing valve 28, The high pressure air of Pneumatic ash conveying pulse of compressed air valve 29.Through above-mentioned processing, most SO in high-temperature flue gas2Gone Remove, realize the purpose of sulfur dioxide in efficient removal high-temperature flue gas.
Operationally, control system complete work be:If exporting SO2Sensor 54 is measured at exhanst gas outlet 5 after desulfurization SO in flue gas2When concentration value is higher than setting value, by exporting SO2Concentration signal is inputted HNI touch-screens by sensor signal lines 55 In microprocessor 56, it is computed handling and then sends control signal to frequency converter 60, increase output frequency, improve frequency conversion lye pump 46 rotating speed, reaches the flow for the alkali lye that increase alkali lye supply system is provided to spraying system, final to realize reduction exhanst gas outlet SO at de- 5 after sulphur in flue gas2Concentration, if conversely, outlet SO2Sensor 54 is measured at exhanst gas outlet 5 in flue gas after desulfurization SO2Concentration value is less than when setting value, by exporting SO2Concentration signal is inputted HNI touch-screen microprocessors by sensor signal lines 55 In device 56, then it is computed sending control signal after processing to frequency converter 60, reduces output frequency, reduction frequency conversion lye pump 46 Rotating speed, reaches the flow for reducing the alkali lye that alkali lye supply system is provided to spraying system, and final realize reduces the consumption of alkali lye, The use cost of reduction system.In addition, when the first lye tank 43 implements water filling, when clear water liquid level reaches setting position, the One audible-visual annunciator 57 sends sound and light signal, reminds operating personnel to close the first lye tank clear water water injection valve 39;In the second alkali lye When case 44 implements water filling, when clear water liquid level reaches setting position, the second audible-visual annunciator 58 sends sound and light signal, reminds operation Personnel close the second lye tank clear water water injection valve 41;When normal desulfurization works, if the first lye tank 43 is supplied to two-fluid shower nozzle When answering alkali lye, when the sodium hydrate aqueous solution being stored in the first lye tank 43 is depleted to liquid level as little as setting value, the first sound Light crossing-signal 57 sends sound and light signal, reminds operating personnel to close the first lye tank feed flow switch valve 48 before pump, opens before pump the Two lye tank feed flow switch valves 50, are converted into the second lye tank 44 and supply alkali lye to two-fluid shower nozzle 11;Equally when the second alkali lye Case 44 to two-fluid shower nozzle supply alkali lye when, when the sodium hydrate aqueous solution being stored in the second lye tank 44, to be depleted to liquid level low During to setting value, the second audible-visual annunciator 58 sends sound and light signal, reminds operating personnel to close the second lye tank feed flow before pump and opens Valve 50 is closed, the first lye tank feed flow switch valve 48 before pump is opened, the first lye tank 43 is converted into and supplies alkali lye to two-fluid shower nozzle.
In blowing out, frequency conversion lye pump 46 is stopped, now, closes the first lye tank clear water water injection valve 39 and the second alkali Liquid case clear water water injection valve 41;Clear water purge valve 38 is opened, cleaning clear water cleans pipe 37, injection alkali lye Trunk Line 21, spray through clear water Reached after penetrating branch road alkali liquor pipe 9, feed flow connection short tube 10 in two-fluid shower nozzle 11, it is defeated through air compressor 26, air compressor Go out the main pressure-reducing valve 22 of pipeline 25, compressed air reservoir 24, compressed air, compressed air main switching valve 23, injection compressed air High pressure air after Trunk Line 20, injection branch road compressed air hose 12, compressed air connection short tube 51 also reaches two-fluid In shower nozzle 11.Clean the nozzle spray from two-fluid shower nozzle 11 after clear water and high pressure air are mixed in two-fluid shower nozzle 11 Go out, after running 20 minutes, sodium hydrate aqueous solution remaining in alkali lye feeding mechanism, transfer line is cleaned completely after whole pump Totally, it is to avoid remaining sodium hydrate aqueous solution, which is dried, to be separated out solid NuaO and cause the stifled of liquid-supplying system and spraying system Plug, be next blow-on be ready,
Through final detection, the SO in smoke outlet, flue gas2Concentration be only 21mg/Nm3, remove SO2Efficiency be 97.2%.
Finally it should be noted that:The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations;Although The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that:It still may be used To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic; And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and Scope.

Claims (10)

1. a kind of sodium base spray dry desulfurization system, it is characterised in that:The system include desulfurizer, alkali lye feeding mechanism, Pneumatic ash conveying plant, compressed air supply system and control device,
The middle and upper part that the desulfurizer is included in sealed housing, the housing is provided with multiple two-fluid shower nozzles, the shell The lower end of body, which is connected with ash bucket, the housing, is provided with flue, and the air inlet of the flue passes through the housing Lower sides and the side wall of the lateral wall of the flue and the housing be tightly connected, the gas outlet of the flue It is arranged on the top of the two-fluid shower nozzle and with being connected in the housing, flue gas is additionally provided with the lower sides of the housing SO is provided with outlet, the exhanst gas outlet2Sensor,
The Pneumatic ash conveying component includes being arranged on the Pneumatic ash conveying pipeline below the ash bucket,
The alkali lye feeding mechanism includes setting at least one lye tank for storing sodium hydrate aqueous solution, the lye tank There is liquid level sensor, the lye tank is connected by transfer line with the liquid-inlet of the two-fluid shower nozzle, the woven hose Frequency conversion lye pump is provided with line,
The compressed air supply system includes air compressor and compressed air reservoir, the compressed air reservoir and institute The air intlet, Pneumatic ash conveying pipeline and lye tank for stating two-fluid shower nozzle are connected by pipeline respectively,
The control device and the SO2Sensor, liquid level sensor and frequency conversion lye pump are electrically connected.
2. sodium base spray dry desulfurization system according to claim 1, it is characterised in that:The lye tank is two, two Individual lye tank is standby each other, is provided with each lye tank in liquid level sensor, the control device and each lye tank Liquid level sensor is respectively connected with.
3. sodium base spray dry desulfurization system according to claim 1, it is characterised in that:The ash bucket is in infundibulate, institute Stating ash bucket includes being arranged in several below the housing, and the discharging opening of each ash bucket is provided with star-shaped discharge valve,
The Pneumatic ash conveying pipeline includes the Pneumatic ash conveying Trunk Line connected with the compressed air reservoir and is connected each The Pneumatic ash conveying by-pass line of the discharging opening of ash bucket, the Pneumatic ash conveying Trunk Line is connected with the Pneumatic ash conveying by-pass line and to institute State conveying compressed air in Pneumatic ash conveying by-pass line.
4. sodium base spray dry desulfurization system according to claim 1, it is characterised in that:The correspondence cigarette in the housing Conical fairing cap is provided with above the gas outlet of feed channel.
5. sodium base spray dry desulfurization system according to claim 1, it is characterised in that:In the upper space of the housing Upper and lower two layers of flow straightening grid is provided with, the two-fluid shower nozzle is arranged between two layers of flow straightening grid;
The jet of the two-fluid shower nozzle is set towards top.
6. sodium base spray dry desulfurization system according to claim 1, it is characterised in that:The transfer line includes and institute State the injection alkali lye Trunk Line of lye tank connection and many injection branch road alkali lye being connected on the injection alkali lye Trunk Line Pipe,
Connect the two-fluid shower nozzle includes connecting with the compressed air reservoir with the pipeline of the compressed air reservoir Injection compressed air Trunk Line and with many injection branch road compressed air hoses being connected of injection compressed air Trunk Line,
The air inlet of each two-fluid shower nozzle connects short tube by compressed air and connected with the injection branch road compressed air hose Logical, the liquid-inlet of each two-fluid shower nozzle connects short tube by feed flow and connected with the injection branch road alkali liquor pipe.
7. sodium base spray dry desulfurization system according to claim 6, it is characterised in that:It is described injection alkali lye Trunk Line with Two lye tanks are connected by lye tank supply pipe before pump respectively, are provided with before every pump on lye tank supply pipe before pump Lye tank feed flow switch valve, the frequency conversion lye pump is arranged on the injection alkali lye Trunk Line.
8. sodium base spray dry desulfurization system according to claim 7, it is characterised in that:Also include detergent line, it is described Detergent line includes clear water Trunk Line, and the clear water Trunk Line is divided into three road outlet pipes, respectively clear water cleaning pipe, two alkali lye Case clear water water injection pipe, the clear water cleaning pipe is upper and two lye tank clear water water injection pipes are respectively arranged with control water conduction Water injection valve,
The delivery port of the clear water cleaning pipe is connected with the injection alkali lye Trunk Line, the water outlet of two lye tank clear water water injection pipes Mouth is corresponded with two lye tanks and connected.
9. sodium base spray dry desulfurization system according to claim 6, it is characterised in that:The compressed air reservoir Outlet is provided with the main pressure-reducing valve of compressed air and compressed air main switching valve,
The inlet end of the injection branch road compressed air hose is provided with injection compressed air bypass valve and injection branch road compressed air Pressure-reducing valve,
The compressed air reservoir is connected by lye tank compressed air stirring pipe with the lye tank, the lye tank compression Lye tank stirring compressed air pressure-reducing valve and lye tank stirring air pressure switch valve are provided with air stirring pipe;
The compressed air reservoir is connected by Pneumatic ash conveying compressed-air line with the Pneumatic ash conveying pipeline, the strength Pneumatic ash conveying pulse of compressed air valve and Pneumatic ash conveying compressed air pressure-reducing valve are provided with defeated grey compressed-air line.
10. the sodium base spray dry desulfurization system according to claim any one of 1-9, it is characterised in that:The control dress It is set to HNI touch-screen microprocessors, the HNI touch-screens microprocessor and the SO2Sensor, frequency conversion lye pump difference Electrically connect and according to SO2The feedback signal of sensor controls the rotating speed of the frequency conversion lye pump,
The HNI touch-screens microprocessor is connected with the liquid level sensor, and the HNI touch-screens microprocessor is also connected with sound Light crossing-signal, the HNI touch-screens microprocessor is sent out according to the feedback signal of the liquid level sensor to the audible-visual annunciator Send control instruction.
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CN107854989A (en) * 2017-09-18 2018-03-30 安徽中科自动化股份有限公司 A kind of nozzle-type barn sulfur method, apparatus and system
CN113713597A (en) * 2021-09-26 2021-11-30 大连海洋大学 Industrial control automatic waste gas purification device
CN113713597B (en) * 2021-09-26 2024-02-06 大连海洋大学 Industrial control automatic waste gas purification device

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