CN205979743U - Multiple air distribution system of buggy industrial boiler low -nitrogen combustion - Google Patents

Abstract

The utility model discloses a multiple air distribution system of buggy industrial boiler low -nitrogen combustion, multiple air distribution system of buggy industrial boiler low -nitrogen combustion, including low NOx burner device and the multiple air distribution system of connection on the low NOx burner device. Because nitrogen oxide generates under high temperature, oxygen boosting condition in a large number, the utility model discloses a combustion technology has adopted hypoxemia backward flow wind system all to combine multiple air distribution technique, and effective control combustion area temperature and oxygen content in the buggy fractional combustion guarantee that the boiler suppresses oxynitrides's formation in high -efficient combustion processes. The utility model discloses the technique has that equipment area is little, simple structure is reliable, convenient operation, advantages such as degree of automation height.

Description

The multiple blowing system of industrial coal powder boiler low nitrogen burning

Technical field

This utility model is related to a kind of multiple blowing system of industrial coal powder boiler low nitrogen burning.

Background technology

Quite interior over a long time in future, numerous economic field such as chemical industry, papermaking, weaving, light industry foods needing with heat vapour The industries such as product, coal-burned industrial boiler will be to produce the leading products providing heat and steam.Highlight in the works 12 The target of environmental protection energy-saving and emission-reduction, carries out becoming with the pulverized coal fired boiler old-fashioned traveling-grate stoker coal-burning boiler of replacement in boiler industry Urgent trend.According to incompletely statistics, there are about 500,000 below 35t/h miniature coal Industrial Boilers in current China, in chemical industry, makes The industries such as paper, printing and dyeing, light industry and food have a wide range of applications.

However, China's middle-size and small-size coal-burned industrial boiler generally existing has the problems such as efficiency of combustion is low, and pollutant emission is high.I Energy consumption structure based on fire coal for the state causes serious atmospheric pollution, 90% SO in atmosphere pollution₂With 67% NOX From the burning of coal, the SO in air₂And NO_XIt is the Main Ingredients and Appearance causing acid rain.The Eleventh Five-Year Plan period, the SO of China₂Discharge It is effectively controlled, domestic Acid Rain Pollution has been shifted compound for sulfuric acid type/nitric acid type by sulfuric acid type.According to statistics, 16,000,000 tons of discharge capacity ＞ of NOX in 2003, is 22,000,000 tons in 2005, reaches 24,000,000 tons within 2010.[NO in acid rain₃-]/ [SO₄ ^2-] ratio rises year by year, be only within 2003 1/8,2006 be 1/3, some areas reach 1/2.Cut down NO_XDischarge capacity It has been put into national " 12 " the binding indicator.

Therefore, how to ensure that boiler suppresses the generation of oxynitride during efficient burning, to reduce Industrial Boiler Discharged nitrous oxides become urgent problem.

In consideration of it, inventor furthers investigate to the problems referred to above, this case is then had to produce.

Utility model content

The purpose of this utility model is to provide a kind of life that can suppress boiler oxynitride during efficient burning Become it is ensured that discharged nitrous oxides meet the multiple blowing system of industrial coal powder boiler low nitrogen burning of national requirements for environmental protection.

In order to achieve the above object, this utility model adopts such technical scheme：

The multiple blowing system of industrial coal powder boiler low nitrogen burning, including low NO device and be connected to low NO Multiple blowing system on device, low NO device includes housing, igniter, primary air fan passage, First air eddy flow Blade, overfire air fan passage, secondary wind swirl vane and tertiary air machine passage, primary air fan passage, overfire air fan passage with And tertiary air machine passage is nested with from the inside to the outside successively, First air swirl vane is correspondingly arranged at the outlet of primary air fan passage, two Secondary wind swirl vane is correspondingly arranged at the outlet of overfire air fan passage, described multiple blowing system include primary air fan system, two Secondary blower fan system and tertiary air machine system, described primary air fan system include primary air fan, Venturi tube, described primary air fan lead to Road and described First air swirl vane.The outlet of primary air fan is connected with the import of Venturi tube, the outlet of Venturi tube and described The inlet communication of secondary fan passage；Described secondary fan system includes overfire air fan, overfire air fan air mixing device, described secondary wind Machine passage and described secondary wind swirl vane.Outside air is sucked by the import of overfire air fan air mixing device with hypoxia backflow wind, The outlet of overfire air fan air mixing device and the inlet communication of overfire air fan, the outlet of described overfire air fan is led to described overfire air fan Road connects；Described tertiary air machine system includes tertiary air machine, tertiary air machine air mixing device and described tertiary air machine passage, three times Outside air and hypoxia backflow wind is sucked by the import of blower fan air mixing device, the outlet of tertiary air machine air mixing device and tertiary air machine Inlet communication, the outlet of tertiary air machine and described tertiary air machine channel connection.

As a kind of optimal way of the present utility model, the First air also including correspondence described primary air fan setting mixes wind dress Put, when described primary air fan uses the centrifugal fan dilute phase feed of the high air quantity of low blast, described primary air fan is mixed by configuring Wind apparatus；When described primary air fan uses the roots blower concentrated phase feed of the low air quantity of high blast, described primary air fan will be unworthy of Put air mixing device.Blower fan type selecting will carry out difference configuration according to chamber structure characteristic, fuel speciality, boiler tonnage.

As a kind of optimal way of the present utility model, also include the First air of correspondence described First air swirl vane setting Swirl vane adjusting means.

As a kind of optimal way of the present utility model, also include four blower fan systems and five blower fan systems, four wind Machine system includes No. four blower fans, No. four blower fan air mixing devices and No. four blower fan quadrangle tangential circle passages.No. four blower fan air mixing devices Import by outside air, hypoxia flow back wind, overfire air fan outlet heat smoke suck, the outlet of No. four blower fan air mixing devices and four The inlet communication of secondary blower fan, the outlet of No. four blower fans and No. four blower fan quadrangle tangential circle channel connections, No. four times blower fan quadrangle tangential circle leads to Road is arranged on the middle and upper part of Industrial Boiler；Five times blower fan system includes No. five blower fans, No. five blower fan air mixing devices and five wind Machine corner comb, outside air is sucked by the import of No. five blower fan air mixing devices with hypoxia backflow wind, No. five blower fan air mixing devices Outlet and the inlet communication of No. five blower fans, the outlet of No. five blower fans connected with No. five blower fan corner combs, No. five blower fan corners Comb is arranged on the bottom of Industrial Boiler.

This utility model has that device systems are compact, floor space is few, stable, the low feature of pollutant emission.Adopt With the steam generator system of utility model, nitrogen oxides in effluent initial ejection concentration is less than 150mg/m³, in conjunction with end denitrification apparatus Discharged nitrous oxides concentration is up to 50mg/m³Hereinafter, require far below National Industrial coal-powder boiler standard.

After such scheme, this utility model has following several big feature：

First, burner can adopt low nitrogen powder combustor, designs multi-stage bias combustion air distribution passage.

2nd, primary air fan can adopt high blast low air quantity roots blower or low blast high air quantity centrifugal blower, blast, air quantity Can according to frequency conversion be adjusted can effective control powder feeding height, to control furnace flame centre height to regulate and control temperature in burner hearth Distribution, reaches low temperature fractional combustion purpose, First air swirl vane adjustable-angle range of accommodation controls at 45 ° -90 ° simultaneously, Control powder feeding height by adjusting First air swirl vane angles change powder feeding resistance；

3rd, the mixing wind after hypoxia backflow wind and air stoichiometry quoted by overfire air fan, by controlling nitrogen oxygen in combustion process The generation of compound, reaches the principle that low nitrogen produces；

4th, tertiary air machine adopts direct current to design, and plays parcel positioned at burner peripheral annular passage and raises swirl flame work With the length of flame being controlled by variable frequency adjustment tertiary air fan delivery blast size in burning, reaching temperature field in regulation and control burner hearth The purpose of distribution, simultaneously the tertiary air power traction hypoxia mixing wind after wind and air stoichiometry that flows back control nitrogen oxygen in combustion process The generation of compound, reaches the principle that low nitrogen produces；

5th, No. four blower fans quote air preheater outlet hot blast and hypoxia backflow wind feeding burner hearth middle and upper part, using corner Circle of contact arrangement supplements burner hearth middle and upper part oxygen amount, so that burner hearth middle and lower part uncombusted coal dust is burnt completely it is ensured that boiler fires in this region Burn efficiency and realize fractional combustion；

6th, burner hearth bottom surrounding sent into by No. five blower fans, and No. five times blower fan adopts infinite reflux wind to combine a small amount of air corner cut air-supply Design, can effectively suppress nitrogen oxides to produce, prevent burner hearth bottom dust stratification simultaneously.The low equipment of the system input cost takes up an area face Amass little, low nitrogen effect good.

7th, this device realizes full-automatic manipulation, is conducive to improving operational efficiency, reduces operating cost.

Brief description

Fig. 1 is the structural representation of the first optimal way of this utility model；

Fig. 2 is the structural representation of a preferred embodiment of coal dust tower in this utility model；

Fig. 3 is the structural representation of a preferred embodiment of burning boiler in this utility model；

Fig. 4 is the structural representation of a preferred embodiment of this utility model bottom type burner；

Fig. 5 is the structural representation of a preferred embodiment of multiple blowing system in this utility model

Fig. 6 is cleaner unit mechanism, coal ash pulping device, air-introduced machine, circulation desulfurizing device, desulfurization in this utility model Tower, light-dark separation device and dehydration device fit structure schematic diagram；

Fig. 7 is the structural representation of a preferred embodiment of desulfurizing tower in this utility model；

Fig. 8 is that in this utility model, device antiscale system applies the structural representation on desulfurizing tower；

Fig. 9 is the enlarged drawing of local A in Fig. 8.

Figure 10 is the structural representation of this utility model second optimal way；

In figure：

Coal dust tower 1

Storage powder tank 11 tower sack cleaner 111

Explosion proof door 112 connected entrance 113

Make tube cell 12 high charge level sensor 131

The middle level sensor 133 of low level sensor 132

Temperature inductor 141 air supply channel 142

Electromagnetic valve unit 143 crushes auger 151

Feeding auger 152 is weighed auger 153

Blowing stopper 154 LOAD CELLS 155

Venturi tube 156 roots blower 157

Pressure reductor 158 burning boiler 2

The public water-cooling wall 211 of boiler body 21

Burner 22

Igniter 221 primary air fan passage 222

First air swirl vane 223 overfire air fan passage 224

Secondary wind swirl vane 225 tertiary air machine passage 226

First air blade control device 227

Multiple air distribution equipment 23 overfire air fan 231

Overfire air fan air mixing device 232 tertiary air machine 233

No. 234 4 blower fans 235 of tertiary air machine air mixing device

236 4 wind quadrangle tangential circle passages 237 of No. four blower fan air mixing devices

No. 238 5 blower fan air mixing devices 239 of No. five blower fans

Five wind corner comb 240 First air air mixing devices 241

Air preheater 3

The airtight casing 41 of cleaner unit mechanism 4

Sack cleaner 42 ash-storing bin 43

Conveying worm 44 tube auger 45

Cyclone dust extractor 46

Coal ash pulping device 5 pulping tank 51

Pump for mortar transmission 52 air-introduced machine 6

Circulation desulfurizing device 7 desulfuration recycle pump 71

Circulating tank 72 deslagging pump 73

Desulfurizing tower 8

Tower body 81 sub-air chamber 811

Neutralization reaction Shi812Ye Qi separation chamber 813

Column type tower section 815 in tapered tower section 814

Lower column type tower section 816 reducing cyclone system 82

Upper hurricane cyclone 821 hydraulic pressure path transfer device 822

823 times hurricane cyclones 824 of aperture-type regulating valve

Magnetic glaze dope layer 831 drain dripping wire groove 832

Steam-operating blows dirty device 833 vibrating motor 834

Cleaning sprayer 835 Pneumatic emulsifying desulfurizing tower 836

Chimney 837 precipitation separation device 9

Concentrator device 91 Pulp pump 96

Mixed flow cylinder 92 filler 93

Rake machine 94 self-circulation pipeline system 95

Dehydration device 10 vacuum ceramic dewaterer 101

Filtrate water box 102 selective catalytic reduction denitration device 201

Hypoxia reflux 202 first back-up system 301

Second back-up system 302 the 3rd back-up system 303

Specific embodiment

For making the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with drawings and Examples, This utility model is further elaborated.Specific embodiment described herein is only used for explaining this utility model, not For limiting this utility model.It should be noted that arrow in Figure of description " → " refer to the flow direction of pipeline medium, The occurring of this arrow does not limit protection domain of the present utility model.

Referring to figs. 1 to Figure 10, in figure arrow represents the flow direction of medium, and this case is related to one kind and has the double burning of bottom type The vertical pulverized-coal fired boiler of device twin furnace, as shown in figure 1, include setting gradually coal dust tower 1, the combustion of connection by operative relation Burning boiler 2, air preheater 3, cleaner unit mechanism 4, coal ash pulping device 5, air-introduced machine 6, circulation desulfurizing device 7, desulfurizing tower 8th, light-dark separation device 9 and dehydration device 10.Below each mechanism and each inter-agency annexation are further elaborated.

Coal dust tower 1 is used for supplying coal dust to burning boiler 2, and coal dust is in powder shaped, and inflammable, so requiring coal dust tower 1 Possess safety reliably storage powder and quantitation but also accurately administer the function of coal dust not only, provide the one of coal dust tower 1 as shown in Figure 2 relatively Good embodiment, it is a kind of pneumatic storage and supply system of metering-type, and main inclusion assembles storage powder device and the powder feeder unit of setting up and down 15；Described storage powder device mainly includes storing up powder tank 11, beats tube cell 12, material level control mechanism 13 and anti-spontaneous combustion protection mechanism 14, under In the face of the storage all parts mechanism of powder device and the specific embodiment of powder feeder unit 15 and preferred embodiment are elaborated.

Storage powder tank 11 is an airtight tank body, and for storing coal dust, the bottom of storage powder tank 11 is provided with feed opening, and top is provided with Explosion proof door 112.Make tube cell 12 to be erected in storage powder tank 11, the upper port making tube cell 12 is meal outlet, and lower port is powder inlet, should Powder inlet is connected with extraneous tank car, and tank car adopts pneumatic conveying mode, via beating coal dust after the powder inlet of tube cell 12 from going out Powder mouth is thrown in storage powder tank 11.The corresponding described meal outlet position in top of storage powder tank 11 is provided with the dedusting mechanism including air-introduced machine 111, by this dedusting mechanism 111, the air storing up in powder tank, vapor (particularly beating a large amount of hot-airs entering during powder) are arranged In addition to tank, smooth to guarantee to beat powder, prevent from storing up in powder tank coal dust the problems such as lump, and outside also assuring that coal dust will not be with air Let out, prevent secondary pollution, significantly improve boiler room environmental health situation, realize clean manufacturing.

Described material level control mechanism 13 is used for carrying out real-time monitoring to the material position of storing in storage powder tank 11 and adjusts control, with Avoid the occurrence of material position too high or too low, thus preventing to cause quick-fried thorax because material deficiency causes powder feeding uneven, or because of thing Material excessively overflows, and causes environmental pollution and economic loss.A preferred embodiment of material level control mechanism 13 is given below, including At least two level sensors and Level control module (not shown), described at least two level sensors are electrically connected to On the signal input part of described Level control module, Level control module preferably can also be electrically connected with alarm unit (in figure Not shown), for sending alarm signal when storage powder tank 11 retaining amount is excessive and very few.Level sensor is arranged on storage powder tank 11 Side wall on, in the specific embodiment being given, described level sensor is provided with 5 altogether, including a high charge level sensor 131, Low level sensor 132 and three middle level sensors 133, this high charge level sensor 131, three middle level sensors 133 And one low level sensor 132 be in vertically Multi-layers distributing successively up and down on the side wall of storage powder tank 11, be in also preferably It is uniformly distributed at equal intervals, near the upper end position setting of storage powder tank 11, low level sensor 132 is close for high charge level sensor 131 The lower end position setting of storage powder tank 11.

The accurate storage feelings of material in storage powder tank 11 during material level control mechanism 13 work, are monitored by each level sensor Condition, wherein high charge level sensor 131 and low level sensor 132 are used in particular for monitoring maximum amount and the minimum flow feelings of material respectively Condition, when material is close to low material position, after the detection of low level sensor 131, coherent signal is sent to Level control module, by expecting Position control module controls tank car in time toward charging in storage powder tank 11, preferably can also send alarm by alarm, thus anti- Only cause quick-fried thorax because material deficiency causes powder feeding uneven；Conversely, when bank is to high charge level, same high charge level sensor After 132 detections, tank car is controlled to stop toward charging in storage powder tank 11 with reason Level control module, preferably can also be by reporting to the police Device sends alarm, thus preventing from because material is excessive overflowing, causes environmental pollution and economic loss.From there through described material position control Mechanism processed substantially increases safety, stability and the reliability of storage powder can system quantitatively supplying powder.

Described anti-spontaneous combustion protection mechanism 14 is used for preventing the storing storing up in powder tank 11 from spontaneous combustion problems occurring, and machine is protected in anti-spontaneous combustion The embodiment of structure 14 can have multiple, a preferred embodiment is given below, this anti-spontaneous combustion protection mechanism 14 includes temperature sense Device 141, the air supply channel 142 of noble gases and associated control modules, described temperature inductor 141 is arranged on storage powder tank 11, The connected entrance 113 being connected with the delivery outlet of air supply channel 142, described associated control modules are offered on the side wall of storage powder tank 11 Including control process unit (not shown) and electromagnetic valve unit 143, this electromagnetic valve unit 143 is arranged on air supply channel 142 On, for controlling the keying of air supply channel 142, described electromagnetic valve unit 143 and temperature inductor 141 all with described control process Unit is electrically connected.

During anti-spontaneous combustion protection mechanism 14 work, the temperature in powder tank 11 is entirely stored up by temperature inductor 141 real-time monitoring and divides Cloth, when temperature inductor 141 temperature sensor exceedes certain value (such as 65 DEG C), warning system sends alarm, air supply channel 142 On electromagnetic valve unit 143 automatically open up, quantitative noble gases (such as liquid low pressure CO 2 is sprayed by connected entrance 113 Gas), noble gases are deposited in surface of material, the oxygen contact with powder tank fuel in isolation air, form one layer of inertia Gas blanket, can achieve that (in about 20 seconds) make coal dust lower the temperature at short notice, effectively prevents its spontaneous combustion, thus substantially lower The risk of spontaneous combustion of pulverized coal, spontaneous combustion incidence rate is almost nil, substantially increases the safety that coal dust stores up powder tank.

Because coal dust is susceptible to spontaneous combustion under given conditions, further, described temperature inductor 141 be provided with some Individual, in upper and lower multilamellar and being uniformly distributed on storage powder tank 11, the connected entrance 113 on storage powder tank 11 is provided with several, this several Connected entrance 113 and several temperature inductors 141 described correspond setting respectively, specifically, this temperature inductor 141 and company The corresponding each group of port 113 is in contour on storage powder tank 11 and is oppositely arranged.Thus, when a certain temperature inductor 141 detects After obtaining uniform temperature, noble gases are sprayed by corresponding connected entrance 113 and is protected, realize quick, timely, accurately and effective Anti- spontaneous combustion defencive function.

Described powder feeder unit 15 mainly includes broken auger 151 all with drive mechanism, feeding auger 152, strand of weighing Dragon 153, also includes LOAD CELLS 155, Venturi tube 156 and roots blower 157.Described broken auger 151, feeding auger 152 and weigh between auger 153 using be flexible coupling mode from top to bottom successively carry out transmission connect, specifically, described broken auger At 151 feed openings being arranged on storage powder tank 11, a preferred embodiment of this broken auger 151, including a pusher shaft and two spirals Blade, the central bottom position of broken auger 151 is provided with discharging opening, and this discharging opening is mutually soft with the feeding mouth of feeding auger 152 Connect.Described two helical blades are respectively provided at described pusher shaft two ends and the hand of spiral is contrary, thus when pusher shaft rotates, two The material at end can be toward middle extruding under the screw propulsion of two helical blades, finally by the discharging opening warp of described broken auger 151 Send into feeding auger 152 by being flexible coupling, described two helical blades to coal dust toward middle extruding, using pressure breaking mode by coal dust The coal cinder of deadweight extruding caking is broken up, to reach pressure breaking effect it is ensured that coal dust enters during feeding auger 152 as powdery.

Be given in embodiment, the lower end of storage powder tank 11 is provided with two discharging openings, corresponding broken auger 151 is provided with two, it Discharging opening be all flexible coupling to the feeding mouth of feeding bipacking-auger 152, the discharging opening of feeding auger 152 is flexible coupling to double strands of weighing The feeding mouth of dragon 153, is provided with double LOAD CELLSs 155, by this LOAD CELLS 155 at the discharge end of auger 153 of weighing Weighed, and realized cumulative in the metering system of device, the amount of powder feeding can be understood in real time.Weigh the discharging of auger 153 Mouth is flexible coupling and has double venturi 156, and a free port of this Venturi tube 156 is discharging opening, and another free port is equiped with double sieve Thatch blower fan 157.The drive mechanism of described broken auger 151, feeding auger 152 and auger 153 of weighing is motor, is wherein System carries out VFC to the motor of broken auger 151 and feeding auger 152, the change according to boiler load and biography of weighing Sensor 155 feedack adjusts electric machine frequency size, reaches the purpose adjusting powder sending quantity, symmetry system having symmetry weight by regulating and controlling rotating speed The motor of auger 153 carries out industrial frequency control, occurs without blocking for ensureing to weigh in auger, and guarantees weighing precision, This utility model weighing precision is up to 0.1KG.

During powder feeder unit 15 work, the coal dust in storage powder tank 11 enters broken in broken auger 151, warp via its discharging opening Coal dust after broken, successively via feeding auger 152 and auger 153 of weighing, all spares to powder by screw propulsion mode, final coal Powder is sent by the discharging opening of auger 153 of weighing and is entered Venturi tube 156, produces the low wind of high blast in roots blower 157 afterwards Under the wind action of amount, by Venturi tube 156, coal dust is broken up in pipeline, finally put double burner the bottom of through and blow in burner hearth.

Described to powder device 15 first via broken auger 151 pressure breaking, then by feeding auger 152 and auger of weighing 153 screw propulsions conveying, finally with Roche blower fan 157 and Venturi tube 156, carry out air conveying confession powder it is ensured that coal dust not Can be in inner pipeline plug plug, the feed situation of auger 153 of weighing carries out on-line metering, described each auger by LOAD CELLS 155 Inter-agency all connected using the mode that is flexible coupling, system other parts can be run the impact LOAD CELLS such as vibration producing by it The factor of 155 weighing precisions eliminates, and thus ensures the accuracy of weighing system to greatest extent.This case is also preferably logical to powder device Cross correlative flow mechanism for monitoring and pulverized coal flow is carried out with monitor in real time, control auger 153 running speed of weighing constant, and according to pot After the signal of the situation of change of stove load and weight sensor feedback is analyzed processing, control broken auger 151 and feeding The powder feed rate of auger 152, thus further ensures that in auger of weighing and does not block, and optimize weighing precision.

In addition, this utility model is also provided with two pressure reductor in inverted " V " font in the surface of broken auger 151 further 158, the bottom of this two pressure reductor 158 is in that the mode being crossed on broken auger 151 central shaft both sides is arranged, and is flow automatically according to coal dust Characteristic, pressure reductor 158 setting the gradient be preferably 70 degree, storage powder tank 11 in coal dust can along pressure reductor 158 naturally cunning Fall and entered by the both sides of broken auger 151, whole coal dusts transfer out it is important to borrow after all crushing through broken auger 151 again By the pressure release effect of pressure reductor 158, reduce the pressure that broken auger 151 born it is ensured that the broken normal work of auger 151 Make.Further, the discharge outlet of described broken auger 151 is also equipped with a Blowing stopper 154, this Blowing stopper 154 is used for isolation storage powder Tank 11 and feeding auger 152, thereby further ensure that weighing system is stable.

Described burning boiler 2, such as Fig. 3 provide its structure design schematic diagram, include boiler body 21 and are arranged on this boiler Double type burner 22 is put at the bottom of body 21 bottom.Boiler body 21 arranges two hearth combustion formulas, corresponds to different bottoms respectively and puts Formula burner 22, left and right combustion chamber high temperature overlay region is arranged using public water-cooling wall 211, and public water-cooling wall 211 height accounts for stove Thorax 1/3rd height, in an embodiment, public water-cooling wall 211 adopts snakelike tubular construction, left and right burner hearth can isolated operation can Successfully manage external load change, single burner hearth list can be carried out according to outside air temperature change in Heating Hot Water Boiler application example Burner Ultra-low load operation, minimum load can be less than 30% continuous service, and solving traditional coal-powder boiler cannot underload continue The problem run, is only applicable to the forced circulation of hot-water boiler using public water-cooling wall 211 structure, ensure that single burner hearth runs When boiler water wall thermal stress compliant require.Public water-cooling wall is not then adopted for Natural Circulation steam oven.Corresponding relatively As shown in figure 4, bottom type low nitrogen double burner 22 is a burner body, this burner body is provided with igniting dress to good embodiment Put 221, primary air fan passage 222, First air swirl vane 223, overfire air fan passage 224, secondary wind swirl vane 225, three Secondary fan passage 226, First air blade control device 227.Primary air fan passage 222, overfire air fan passage 224, tertiary air machine Passage 226 is to being nested with successively from inside to outside.Igniter 221 adopts high energy natural gas/liquefied gas igniting, primary air fan passage 222 For coal dust transfer passage, between Pulverized Coal Bin 1 and burner 22, one-level powder feeding is realized even by one-level powder feeding pipe (i.e. Venturi tube 156) Connect, one-level powder feeding pipe is connected with the primary air fan 157 (i.e. roots blower or centrifugal blower) for air blast.Overfire air fan passage 224, it is the secondary wind ajutage of burner 22, tertiary air machine passage 226 is the tertiary air ajutage of burner 22.First air revolves Stream blade 223, secondary wind swirl vane 225 are located at burner 22 exit, are arranged on affiliated fan passage end, make through this The breeze airflow of swirl vane, combustion air are in that eddy flow state enters boiler combustion, contribute to the raising of efficiency of combustion.Tertiary air machine Passage 226 does not contain swirl vane, is played parcel flame, is prevented localized hyperthermia, elongates the purpose raising flame using direct current design, Contribute to boiler hearth temperature distribution adjustment.First air blade control device 227 is by adjusting to First air swirl vane 223 angle Section (45 ° of range of accommodation -- 90 °), to change breeze airflow by resistance during blade, to reach change furnace flame centre height To regulate and control the purpose of Temperature Distribution in burner hearth.

Corresponding preferred embodiment is as shown in figure 5, many level air-distributions equipment 23 mixes wind dress by overfire air fan 231, overfire air fan Put 232, tertiary air machine 233, No. 234, four blower fans of tertiary air machine air mixing device 236, four wind of No. 235, four blower fan air mixing devices No. 237, five blower fans of quadrangle tangential circle passage 239, five wind corner combs 240 of No. 238, five blower fan air mixing devices and corresponding pipeline instrument Meter valve forms.Overfire air fan 231, tertiary air machine 233 connect low NO 22, and No. four times air preheater 3 quoted by blower fan 235 Outlet hot blast and hypoxia backflow wind send into burner hearth middle and upper part four times wind quadrangle tangential circle passage 237, are arranged using quadrangle tangential circle and supplement Burner hearth middle and upper part oxygen amount, makes burner hearth middle and lower part uncombusted coal dust burn completely in this region, realizes fractional combustion and improves boiler combustion Burn efficiency, those skilled in the art can be according to the size of burner hearth, in the burner hearth differing heights setting multi-layer rotational flow circle of contact four times Wind, namely the outlet of No. four blower fans 235 is divided into multichannel, every road is all connected with four wind quadrangle tangential circle passages 237, and four times wind corner is cut Circular channel 237 is laid in the differing heights of burner hearth, forms multi-layer rotational flow, to realize the abundant burning of coal dust.No. five blower fans 238 are even Connect five wind corner combs 240 of burner hearth bottom, No. five times blower fan air mixing device 239 is sent with reference to a small amount of air corner cut using infinite reflux wind Wind designs, and can effectively suppress nitrogen oxides to produce, prevent burner hearth bottom dust stratification simultaneously.The low equipment of the system input cost takes up an area Little, the low nitrogen effect of area is good.In Fig. 5 example primary air fan 157 using roots blower when do not configure First air air mixing device, Figure 10 In example, primary air fan 157 adopts and configures First air air mixing device 241, the entering of primary air fan air mixing device 241 during centrifugal blower Outside air is sucked by mouth with hypoxia backflow wind, and when using low pressure high air quantity primary air fan, air mixing device can reduce coal dust Air-flow initial oxygen content reaches the purpose of low oxygen combustion, and flow back about 100-130 DEG C of air temperature simultaneously, can play pulverized coal preheating and make With reducing the purpose that heat loss due to exhaust gas improves boiler thermal output.

Overfire air fan air mixing device 232, tertiary air machine air mixing device No. 236, five blower fans of No. 234, four blower fan air mixing devices Air mixing device 239, according to fire box temperature, boiler export oxygen content numerical value, steam generator system afterbody discharge on-line checking nitrogen oxides Numerical value, to adjust backflow wind and air stoichiometry.Because primary air fan 157 is powder feeding blower fan, First air and coal that primary air fan conveys Powder is mixed to form breeze airflow and enters burner hearth, and First air oxygen content height affects coal dust and enters initial combustion state after burner hearth, because This primary air fan air mixing device 241 adjusts backflow wind and air stoichiometry according to furnace flame combustion intensity, fire box temperature.Work as stove Thorax flame intensity is high, when burner hearth bottom temperature is high, can suitably increase primary air fan air mixing device 241 internal reflux wind ratio, such as go out Existing burner hearth bottom need to adjust in primary air fan air mixing device 241 when taking off fire, flame fluctuation, burner hearth bottom temperature rapid decrease in time Backflow wind ratio.

When burner hearth bottom temperature is high, increase No. five blower fan 238 air quantity, reduce No. five blower fan air mixing devices 239 simultaneously and enter Mouth air capacity, weakening, by controlling furnace bottom oxygen content to reach, the purpose that burning reduces bottom temperature；When burner hearth bottom temperature is high And burner hearth middle and upper part temperature is relatively low, when fire box temperature field distribution is uneven, increase tertiary air machine 233 air quantity, increase three simultaneously Secondary blower fan air mixing device 234 inlet return wind air quantity, raises flame by controlling tertiary air machine 233 intensity to wrap up, reaches and draw Long flame reduces burner hearth bottom temperature, improves the purpose of burner hearth middle and upper part temperature；When boiler heavy-duty service, coal dust is in burner hearth When cannot burn completely in bottom, increase No. four blower fan 235 air quantity, reduce No. four blower fan air mixing device 236 inlet return wind simultaneously Air quantity, No. four times blower fan 235 will mix the quadrangle tangential circle passage 237 of wind feeding burner hearth middle and upper part, becomes circle of contact eddy flow in freeze profile Wind, No. four blower fans 235 supplement burner hearth middle and upper part oxygen amount, so that burner hearth middle and lower part uncombusted coal dust is burnt completely in this region it is ensured that Boiler combustion efficiency realizes fractional combustion.When steam generator system afterbody discharge online detection instrument detects discharged nitrous oxides numerical value Gao Shi, can suitably increase overfire air fan air mixing device 232, No. 234, four blower fan air mixing devices 236, five of tertiary air machine air mixing device Secondary blower fan air mixing device 239 backflow wind and air stoichiometry, reach smoke backflow low nitrogen burning purpose.

Described backflow wind (i.e. hypoxia backflow wind) exports from air-introduced machine 6 and introduces each fan inlet through hypoxia reflux 202 Air mixing device, backflow wind be boiler combustion after produce flue gas, have oxygen content low temperature high the features such as, flow back wind oxygen content 5%- 9%, 100 DEG C -130 DEG C of temperature, it is mainly used in directly adjusting the oxygen content of coal dust periphery, fired state can be finely adjusted, energy Enough improve the adaptability to different quality coal dusts for the burner, also utilize afterbody waste heat simultaneously and reach reduction of discharging energy-conservation purpose.

Described burning boiler 2 is designed to control the generation of coking well, and during burning, a powder feeding is passed through in one-level powder feeding Wind sends into bottom type double burner 22, and primary air fan 157 adopts high blast low air quantity roots blower or the centrifugation of low blast high air quantity Blower fan, blast, air quantity can according to frequency conversion be adjusted can effective control powder feeding height, to control furnace flame centre height Temperature Distribution in regulation and control burner hearth, reaches low temperature fractional combustion purpose, and First air swirl vane 223 adjustable-angle adjusts model simultaneously System of containing, at 45 ° -90 °, controls powder feeding height by adjusting First air swirl vane 223 Angulation changes powder feeding resistance, enters one Step improves the height that catches fire of flame, improves the height of flame kernel, also away from the heat-accumulating area of mould material, and also allows Water screen tube in boiler body 21 fully absorbs heat, and reduces the temperature of furnace bottom.Flame, when burning in high-temperature region, adds big in time Tertiary air machine 233 air quantity of amount, tertiary air machine 233 adopts direct current to design, and plays parcel positioned at burner peripheral annular passage and pushes away Rise swirl flame effect, in burning, the length of flame is controlled by variable frequency adjustment tertiary air machine 233 airflow pressure size, reach tune Control the purpose of thermo parameters method in burner hearth, the mixing wind after hypoxia backflow wind and air stoichiometry quoted by tertiary air machine 233 simultaneously Control the generation of oxynitride in combustion process, reach the principle that low nitrogen produces.Fine coal fusion point of ash is 1180 DEG C, this case profit Put, flue gas mix homogeneously contrary with burner outlet flue gas direction of rotation with double burner twin furnace bottom, burner hearth is laterally and vertical To temperature field more equalize, heating surface heat-transfer effect is good, the advantage of flame range length, by described reduction bottom temperature and burner hearth High-temperature region temperature, has just efficiently controlled the generation of coking, reduces the discharge of nitrogen oxides, and nitrous oxides concentration is less than 150mg/m³.Double burner is arranged at the different burner hearth in left and right simultaneously, and interfering property is relatively low, and be in operation achievable single burner Underrun, it is also double burner twin furnace bottom type water heater Dan Ran under special circumstances that hot-water boiler adopts forced circulation Burner is run provides possible condition.

Burning boiler 2 adopts double burner twin furnace bottom type mode, and reduces furnace bottom temperature by a series of above-mentioned technology Degree and burner hearth high-temperature region temperature, not only solve burner hearth coking, the big problem of nitrogen oxides volume of production, make bottom type double burner in pot It is carried out in stove, burner outlet flue gas direction of rotation is contrary, flue gas mix homogeneously, and the horizontal and vertical temperature field of burner hearth is more Equilibrium, heating surface heat-transfer effect is good, and more crucial is that to realize flame temperature controlled, reduces flame temperature, elongates burning fire bundle, improve The efficiency of combustion (boiler thermal output is up to 88%-92%) of burner hearth, also provides advantage for purification flyash, by controlling Furnace flame high-temperature temperature, under 1300 DEG C of -1500 DEG C of high temperature, is preferably controlled in 1400 DEG C about, and this temperature is viscous in combustion powder The melt temperature value of soil property mineral, after the melting of this clay mineral matter, forms drop, drop is in height under surface tension effects In speed motion, expanding formation bulky grain is adsorbed in agitation collision (melting particulate binder strong).In addition, double burner bottom put mode its Compared with existing conventional arrangement, that is, simplify coal powder conveying system, considerably reduce powder feeding height, optimize coal dust defeated The power sending, saves energy consumption, solves the problems, such as that coal dust delivery pipe abrasion-resistant metal elbow is easy to wear, reduces installation and uses Cost, overcome single burner boiler Large Copacity again and cannot meet boiler output and low load combustion problem；Burner is put at bottom Also save the space of boiler room, facilitate adjustment and the maintenance of burner.

Described air preheater 3 is connected to burning boiler 2 rear end, and the flue gas for discharging to burning boiler 2 is carried out rapidly Cooling, so that the bulky grain cooling down that melting is formed in burning boiler 2 is glass microballoon.Described cleaner unit mechanism 4 is even It is connected on air preheater 3 rear end, for carrying out dedusting to flue gas after cooling, efficiency of dust collection, up to more than 99.6%, is simultaneously used for The flue gas being mixed with powder ash (predominantly CaO) that will be fed into carries out flue dust and separates.

It is standby that coal ash pulping device 5 includes conveying worm 44, tube auger 45, pulping tank 51, pump for mortar transmission 52, first System 301 and the second back-up system 302, the outlet of described cleaner unit mechanism 4 and the inlet communication of conveying worm 44, spiral The outlet of conveyer 44 is all connected with the import of tube auger 45 and the import of pulping tank 51, the import of pump for mortar transmission 52 and pulping tank 51 outlet, outlet and the inlet communication of described light-dark separation device 9 of pump for mortar transmission 52, the first back-up system 301 and the The outlet all with pump for mortar transmission for two back-up systems 302.Tube auger 45 connects tank car in bulk, by fine coal in cleaner unit mechanism 4 Ash is delivered to tank car, as flyash dry process back-up system；First back-up system 301 is the back-up system of circulating tank 72, Second back-up system is the back-up system of vacuum ceramic dewaterer 101.

Described cleaner unit mechanism 4, as shown in fig. 6, including airtight casing 41 and being located at set up and down in this casing 41 High-efficient cloth-bag dust precipitator 42 and ash-storing bin 43, this airtight casing 41 offers smoke inlet (not shown) and outlet flue (not shown), this smoke inlet position between corresponding high-efficient cloth-bag dust precipitator 42 and ash-storing bin 43 in airtight casing 41 Place, at described outlet flue position of corresponding high-efficient cloth-bag dust precipitator 42 top in airtight casing 41.The going out of airtight casing 41 Mouth connects via an air-introduced machine 6 to the tower mouth of desulfurizing tower 8, and the feed opening of described ash-storing bin 43 is via conveying worm 44 even Connect ash charge mouth and the tube auger 45 of pulping tank 51, tube auger 45 is transported outward after dry ash conveying to tank car in bulk, can be used for work Industry brickmaking.

During sack cleaner mechanism 4 work, flue gas is passed through by the smoke inlet of airtight casing 41, by high-efficient cloth-bag dust precipitator 42 Catch the mixed coal ash containing in flue gas, this coal ash is collected by the ash-storing bin 43 of lower section, and the coal ash being collected falls under gravity into In spiral conveying mechanism 44, by spiral conveying mechanism 44 screw propulsion coal ash to pulping tank 51, the stirring of flyash agitated device is all Even, concentration is delivered to concentrator 91 by pump for mortar transmission 52 after reaching requirement and carries out serosity separation use.Pump for mortar transmission 52 outlet setting is defeated Deliver to the second back-up system 302 of vacuum ceramic dewaterer 101, pulverized fuel ash slurry is fed directly to vacuum ceramic dewaterer 101 are dried processed, carry out desulfurization using the alkaline clear liquor after dehydration, and the setting of pump for mortar transmission 52 outlet simultaneously is delivered to First back-up system 301 of circulating tank 72, when concentrator device 91 fault, flyash is fed directly to circulating tank 72 and is taken off Sulfur.

Described high-efficient cloth-bag dust precipitator 42 and integrating of ash-storing bin 43, will ash silo be combined with dust-precipitator, can Dedusting can store up ash again, and not only seal is strong, and ensures that collection efficiency reaches more than 99.6%, and the frequency clearing ash can also drop Low.

The powder ash that described sack cleaner 42 is collected adds pulping tank 51 as a kind of raw material preparing desulfurizing agent, with system Industrial wastes in slurry tank 51 and recovery waste water, under the chemicalses fusion such as dispersant and stabilizer, lead to through mechanical agitation Cross physically activated and chemical activation (such as infrared radiation) method and it is carried out with activation modification, improve powder ash CaO or Ca (OH) 2 Excite, end reaction synthesizing efficient calcium-based desulfurizing agent serosity (main component CaO powder ash) is delivered to concentrator dress by pump for mortar transmission 52 Put 91 and carry out precipitate and separate.

Circulation desulfurizing device 7 includes desulfuration recycle pump 71, circulating tank 72, deslagging pump 73 and slurry pipe line valve etc.；Described Circulating tank 72 includes agitator, level gauge, apparatus for measuring concentration, and circulating tank 72 import serosity is to overflow in concentrator device 91 upper strata Stream clear liquor；Described circulating pump 71 import connects described circulating tank 72, and outlet connects described desulfurizing tower 8, by powder in circulating tank 72 Coal ash desulfurizing agent is delivered in desulfurizing tower 8 and is circulated desulfurization, and after desulfurization, to circulating tank 72, warp is de- for pulverized fuel ash slurry overflow Sulfur cycle pump 71 is delivered to desulfurizing tower 8 again and is circulated desulfurization use.Described deslagging pump 73 import connects described circulating tank 72, Outlet connects described concentrator device 91, when serosity PH lowering of concentration in circulating tank, is delivered to described by described deslagging pump 73 Concentrator device 91 carries out recirculation dissolving, reaches circulating repetition and uses, improves serosity utilization ratio, described deslagging pump 73 simultaneously Outlet is provided with the 3rd back-up system 303 being delivered to dewaterer 4 it is ensured that circulating tank 72 entoplasm liquid energy during concentrator device 21 fault Enough normal processed.Clean flue gas after processing through desulfurizing tower 8 are by the high-order emptying of chimney 837.

The grout outlet of desulfuration recycle pump 71 connects to the desulfurizing agent spout of described desulfurizing tower 8 by desulfurizer nozzle, will High efficiency calciam base desulfurizer slurry sprays into desulfurizing tower directly as the desulfurizing agent of flue gas, with send into desulfurizing tower in contain SO₂Cigarette Gas, under pneumatic hurricane vortex acts on, is fully contacted hybrid reaction and produces CaSO₃, realize flue gas desulfurization effect.The CaSO producing₃ Finally enter the intermediate pool of desulphurization system, by Oxygenation, generate dihydrate gypsum.Clean cigarette after processing through desulfurizing tower 8 Gas is by the high-order emptying of chimney 837.

Above-mentioned desulfurizing tower 8 includes Pneumatic emulsifying desulfurizing tower 836 and chimney 837, for coming to sack cleaner mechanism 4 conveying Flue gas carry out desulfurization operations, handled exhaust gas volumn situation of change can directly affect the desulfurized effect to flue gas for the desulfurizing tower 8, therefore And make desulfurizing tower 8 still ensure that in the case of exhaust gas volumn changes greatly preferable desulfurized effect is most important.For this problem, this Case provides a preferred embodiment of desulfurizing tower 8, as shown in fig. 7, desulfurizing tower 8 is a kind of bilayer reducing cyclone desulfuration tower, including There is tower body 81, this tower body 81 is mainly by the sub-air chamber 811 connecting from bottom to up, neutralization reaction room 812,813 groups of Ye Qi separation chamber Become, the structure of tower body 81 and operation principle are similar with existing desulfurizing tower, no longer tire out in detail here and state.Desulfurizing tower 8 also includes becoming Footpath cyclone system 82, this reducing cyclone system 82 includes hurricane cyclone 821, hydraulic pressure path transfer device 822, aperture-type regulating valve 823rd, lower hurricane cyclone 824, flue gas quantity sensor (not shown) and master control mechanism (not shown).Hurricane rotation on this Stream device 821, hydraulic pressure path transfer device 822, aperture-type regulating valve 823, lower hurricane cyclone 824 are from top to bottom successively set on neutralization instead Answer in room 812, wherein hydraulic pressure path transfer device 822 is specially hydraulic pressure Kraft section path transfer device, and it is coaxially nested with neutralization reaction room 812 Interior.The lower port of described aperture-type regulating valve 823 is connected with the fixation of lower hurricane cyclone 824, and upper port stretches into hydraulic pressure path transfer device In 822, between the two, carry out the adjustable connection that links, that is, the bore of the upper port of aperture-type regulating valve 823 is adjusted with hydraulic pressure path transfer device 822 Footpath changes and the change that links.

Described flue gas quantity sensor is used for the exhaust gas volumn situation of detection process flue gas, and flue gas quantity sensor is by data wire electricity Connect to the data input pin of master control mechanism, thus the data detecting is sent to master control mechanism by data wire and be analyzed Process.The signal output part of described master control mechanism passes through controlling bus and hydraulic pressure path transfer device 822 and lower hurricane cyclone 824 difference It is electrically connected, lower hurricane cyclone 824 has the swirl vane of adjustable angle, master control mechanism is carried out point to the exhaust gas volumn of detection After analysis is processed, send control instruction to hydraulic pressure path transfer device 822 and lower hurricane cyclone 824, hydraulic pressure path transfer device 822 is realized with this Path transfer acts on, and the angle change of the rotating vane of lower hurricane cyclone 824.

During desulfurizing tower work, untreated flue gas are passed through by the sub-air chamber 811 of tower body 81 first, and untreated flue gas are carried out all Enter in neutralization reaction room 812 after even guiding, flue gas is passed through by lower hurricane cyclone 824 first, via aperture-type regulating valve 823 It is passed through hydraulic pressure path transfer device 822 again, the desulfurizer nozzle from neutralization reative cell 812 upper end for the desulfurizing agent sprays into, via upper hurricane eddy flow After device 821 effect, enter and carry out with pending flue gas in hydraulic pressure path transfer device 822 being atomized neutralization reaction, reacted band shredded tobacco for water pipes gas Enter Ye Qi separation chamber 813 and carry out gas-liquid separation and go forward side by side one-step desulfurization, after processing the most at last, flue gas is arranged to air.

Reducing cyclone system 82 adopts frequency conversion principle of automatic control, passes through to change the eddy flow leaf of lower hurricane cyclone 824 during work The angle of piece, so as to adapt to the change of exhaust gas volumn, so that flue gas eddy flow becomes preferable rotational flow gas, that is, ensures eddy flow flue gas tool There is the active force of preferable desulfurized effect, this eddy flow flue gas enters in hydraulic pressure path transfer device 822 afterwards, changes by hydraulic pressure path transfer device 822 Becoming the diameter in neutralization reaction space, automatically adjusting balancing response space, thus ensureing that eddy flow flue gas has preferable and stable footpath To speed, this stable radial velocity ensure that the preferable balancing response time, finally can reach preferable desulfurized effect.Cigarette Gas is purified by this case desulfurizing tower, and smoke dust discharge concentration is less than 20mg/m³, desulfurization degree reaches more than 97%, and sulfur dioxide concentration is little In 50mg/m³.

Further, described desulfurizing tower 8 is easy to dirty during using, dirty is also impact desulfurizing tower 8 normal work And a key factor of desulfurized effect, for the scale problems of desulfurizing tower 8, this case gives a preferred embodiment, as Fig. 8-9 institute Show, desulfurizing tower 8 is additionally provided with antiscale system 83, this antiscale system 83 is mainly by magnetic glaze dope layer 831, drain dripping wire groove 832, vapour Move and blow dirty device 833 and vibrating motor 834 4 great institutions composition, on desulfurizing tower 8, the tower body of desulfurizing tower 8 has their integrated combinations There are the upper column type tower section 815 being sequentially connected from top to bottom, tapered tower section 814 and lower column type tower section 816, described tapered tower section 13 is in Gradually necking down from top to bottom.In the embodiment being given, desulfurizing tower 8 is double-decker, described tapered tower section 814, upper column type tower section 815 and lower column type tower section be respectively formed with one group about 816, the medial wall of described tapered tower section 814 also referred to as in sunny side, wherein especially Be desulfurizing tower 8 topside position interior sunny side be the easy dirty of desulfurizing tower 8 position, and this interior sunny side is also to cause lower column type tower One principal element of section 816 inwall dirty.

The combination of sets of described antiscale system becomes distribution as follows：Described magnetic glaze dope layer 831 is attached to the interior of tapered tower section 814 On sunny side, described drain dripping wire groove 832 is connected at the inside edge of tapered tower section 814 bottom, and this drain is dripped The free end of wire casing 832 extends to lower column type tower section 816 inside and obliquely, preferably the inclination of this drain dripping wire groove 832 Angle is identical with the angle of inclination of sunny side in tapered tower section 814, and drain dripping wire groove 832 can be provided with several as needed, Or the lower edge integral arrangement of interior sunny side of postponing.Described steam-operating blows dirty device 833 and vibrating motor 834 is arranged at column type tower On the side wall of section 815, close with the natural frequency of dirty body or identical, steam-operating is blown for the vibration frequency control of vibrating motor 834 The number of dirty device 833 and vibrating motor 834 can be provided with multiple as needed and be uniformly distributed setting.

Antiscale system further comprises the cleaning sprayer 25 for rinse water input, and this cleaning sprayer 25 is located at column type tower Blow above dirty device 833 in section 815 and positioned at steam-operating.In Fig. 8, desulfurizing tower 8 topside position is provided with a whole set of described antiscale system, And lower floor position, due to fouling relatively fewer it may not be necessary to set a whole set of antiscale system, such as in figure only sets drain dripping wire groove 832 and vibrating motor 834.

This utility model antiscale system is antiscale scale removal in production run, firstly because there being magnetic glaze dope layer 831 Foundation protection, make the interior sunny side of easy fouling have the advantages that wear-resisting, be difficult the group that dust, easy cleaning, separating degree are high, produce in tower Knit lower water (such as desulfurization neutralizer) dirty along interior sunny side, by the drainage of drain dripping wire groove 832, under described tissue Water following current hanging and under, thus avoid organizing lower water directly dirty and produce along lower column type tower section 816 inwall in conventional art The included wall dirt of tower.For the powder dust particle in tower, blow the energy effect of dirty device 833 by steam-operating, make air molecule and dust grain Son produces vibration and destroys, and stops powder dust particle from depositing on heating surface surface, also stops simultaneously and combine between particle, is allowed to be in outstanding Floating state, to make flue gas be taken away or by self gravitation sedimentation, to reach the purpose of deashing.Certainly inevitable or can be Dirty body on a small quantity is assembled on inner wall of tower, now by the effect of vibration of vibrating motor 834 and dirty body natural frequency same frequency, makes dirty body Separate from attached wall.Cleaning sprayer 835 suitably can spray clear water toward in tower in good time, makes dirty body before fouling or fouling again Before be washed.

In this utility model, desulfurizing agent is flyash solution, and main component is active calcium oxide and other oxides, calcium Base desulfurizer be in reality be very easy to obtain be more economical desulfurizing agent.

Desulfurizing tower top arrangement spiral board dehydrator, humid flue gas 95% moisture after the process of this equipment recycles；By In emulsion the specific surface area of liquid grain bigger than methods such as water film dedusting, spraying and dedustings several times to tens times, therefore, unit liquid measure The efficiency of supplementary set and the harmful substance absorbing will significantly increase, and desulphurization reaction speed is fast, efficiency high, absorbing liquid utilization rate are high.

Described light-dark separation device 9 include concentrator device 91, mixed flow cylinder 92, rake machine 94, filler 93, Pulp pump 96, Self-circulation pipeline system 95 and slurry pipe line valve etc.；Described mixed flow cylinder 92, rake machine 94, filler 93 are arranged on concentrator device In 91, mixed flow cylinder 92, filler 94, rake machine 93, Pulp pump 96 are sequentially connected from top to bottom；Described concentrator device 91 is flyash Serosity light-dark separation device, import connects mixed flow cylinder 92, and concentration relatively low clear serum in upper strata is sent into circulating tank 72 and carried out desulfurization, The high serosity of lower floor's concentration is sent into vacuum ceramic dewaterer 101 through described Pulp pump 96 and is dehydrated；Described rake machine 94 is concentrator Device 91 interior stirring device；Described filler 93 is macromolecule inclined plate packing, is the internal deep or light serosity water conservancy diversion of concentrator device 91 Device.Pulp pump 96 import connects concentrator device 91 bottom, and outlet connects dehydration device 10, and described Pulp pump 96 exports simultaneously It is provided with standby self-circulation pipeline system 95, internal self-loopa can be carried out in dewaterer 10 fault, prevent bottom slurry deposition stifled Plug is it is ensured that desulfurization slurry concentration reaches use demand.

Concentrator device 91 is efficient deep wimble thickener, its top cylindrical shape, the body of lower cone shape.Serosity enters circle Tubular top mixed flow cylinder 92.Most of water in serosity flows to periphery in the settling section of concentrator cylindrical portions and overflows, little portion Divide and form little vortex in floc sedimentation decanting zone.It is in compressional zone in the tapered segment of body, precipitate is carried out under gravity Compression, is extracted out by underflow opening Pulp pump 96.Deep cone thickener cone is denseer, and precipitate is deposited cone base and born big gravity compressed Effect, makes the solids content of underflow very high.Described concentrator device 91 is light-dark separation device, using efficient deep cone precipitation side Formula, simultaneously built-in macromolecule inclined plate packing it is ensured that supernatant ＜ 0.5%, underflow density ＞ 30%, meet desulfurization use Reduce dehydration energy simultaneously.The upper clear supernate overflow of concentrator device 91 is circulated desulfurization to circulating tank 72 and uses, lower floor The high serosity of concentration is sent into vacuum ceramic dewaterer 101 through described Pulp pump 92 and is dehydrated.

Pulverized fuel ash slurry is entered behind concentrator device 91 inside by mixed flow cylinder 92, carries out separating through packing layer 93, top is clear Clear liquid overflow to circulating tank 72 carries out desulfurization, and the high serosity of lower floor's concentration sends into vacuum by Pulp pump 96 after loosening through rake machine 94 stirring Ceramic dewaterer 101 is dehydrated.Pulp pump 96 outlet is provided with standby self-circulation pipeline system 95, by concentrator device 21 bottom Serosity is delivered to mixed flow cylinder 92 again, carries out inner loop.

Dehydration device 10 includes vacuum ceramic dewaterer 101 and filtrate water box 102.Vacuum ceramic dewaterer 101 work base In the action principle of capillary micropore, using micropore ceramics as filter medium, using micropore ceramics are narrow and small in a large number, there is capillary work With the solid-liquid separating equipment of principle design, the disk filter under negative pressure working condition, using microporous ceramic filter plate, it is only The air-locked characteristic of special water flowing, extracts ceramic filter plate inner chamber vacuum and produces and outside pressure reduction, make the material suspending in hopper Adsorb in the presence of negative pressure on ceramic filter plate, solid material is because being trapped within pottery by microporous ceramic filter plate Plate surface, and liquid drains into filtrate water box 102 and is circulated utilization because outer in the presence of vacuum pressure reduction, thus reaching solid-liquid separation Purpose, after desulfurization, flyash solid material concentrates outward transport, can be used as cement additire, industrial brickmaking etc..Filtrate water box 102 is The clarification akaline liquid container being separated out after dewatering slurries, after dehydration, clear liquor overflows back described system by described filtrate water box 102 Slurry tank 51, uses as fresh water (FW) during pulverized fuel ash slurry initial preparation.

Refer again to Figure 10, as second optimal way of the present utility model, this utility model also proposes a kind of coal dust work Industry boiler smoke dust-removal and desulfurizing denitrating system, second optimal way is with the difference of the first optimal way：In second In embodiment, in industrial coal powder boiler flue-gas dust-removing and desulfurization denitrating system, in burning boiler 2, you can to use single burner Device, it is possible to use double burner.Industrial coal powder boiler flue-gas dust-removing and desulfurization denitrating system also includes equipment for denitrifying flue gas, flue gas Denitrification apparatus include selective catalytic reduction denitration device 201 and hypoxia reflux 202, selective catalytic reduction denitration device The outlet outlet of boiler body (concrete and) of 201 import and low NO device, SCR The outlet of denitrification apparatus 201 and the inlet communication of cleaner unit mechanism 4, the outlet of hypoxia reflux 202 is (i.e. many with blowing system Weight blowing system) inlet communication, the import of hypoxia reflux 202 connected with air-introduced machine 6, specifically, hypoxia reflux Outlet and primary air fan air mixing device 241, overfire air fan air mixing device 232, No. 234, four blower fans of tertiary air machine air mixing device The inlet communication of No. 236, five blower fan air mixing devices 239 of air mixing device.In second optimal way, cleaner unit mechanism includes revolving The outlet of wind cleaner unit 46 and sack cleaner 42, the import of cyclone dust extractor 46 and described air preheater 3, strap removes The import of dirt device 42 and cyclone dust extractor 46 outlet, the outlet of cyclone dust extractor 46 and sack cleaner 42 all with described powder The inlet communication of coal ash pulping device 5.

To sum up, this coal burning system is by a series of technological innovation and transformation, has reached that boiler thermal output is high, and dust is received Collection good leak tightness and collection efficiency is excellent, the desulfuration efficiency of desulfurizing tower is splendid and antiscale, scale removal excellent performance are it is ensured that efficient Desulfurization process and saving labour etc.；Finally make the discharge index of this utility model system flue gas dense far below national regulation discharge Degree, reaches the beneficial effect of energy-efficient, reduction of discharging and environmental protection, and this utility model is put using double burner twin furnace bottom first simultaneously Formula hot water furnace structure, belongs to domestic initiation.

Above-described embodiment and schema non-limiting product form of the present utility model and style, any art Suitable change or modification that those of ordinary skill is done to it, all should be regarded as without departing from patent category of the present utility model.

Claims (3)

1. the multiple blowing system of industrial coal powder boiler low nitrogen burning it is characterised in that：Including low NO device and being connected to Multiple blowing system on low NO device, low NO device include housing, igniter, primary air fan passage, First air swirl vane, overfire air fan passage, secondary wind swirl vane and tertiary air machine passage, primary air fan passage, secondary Fan passage and tertiary air machine passage are nested with from the inside to the outside successively, the corresponding primary air fan passage setting of First air swirl vane, The corresponding overfire air fan passage setting of secondary wind swirl vane, described multiple blowing system includes primary air fan system, overfire air fan System and tertiary air machine system, described primary air fan system include primary air fan, Venturi tube, described primary air fan passage and Described First air swirl vane, the outlet of primary air fan is connected with the import of Venturi tube, the outlet of Venturi tube and described First air The inlet communication of machine passage, described secondary fan system include overfire air fan, overfire air fan air mixing device, described overfire air fan lead to Road and described secondary wind swirl vane, the outlet of overfire air fan air mixing device and the inlet communication of overfire air fan, described secondary The outlet of blower fan and described overfire air fan channel connection, described tertiary air machine system includes tertiary air machine, tertiary air machine mixes wind dress Put and described tertiary air machine passage, the outlet of tertiary air machine air mixing device and the inlet communication of tertiary air machine, tertiary air machine Outlet and described tertiary air machine channel connection.

2. the multiple blowing system of industrial coal powder boiler low nitrogen burning as claimed in claim 1 it is characterised in that：Also include corresponding to The First air swirl vane adjusting means of described First air swirl vane setting and the First air according to the setting of boiler different condition Air mixing device.

3. the multiple blowing system of industrial coal powder boiler low nitrogen burning as claimed in claim 2 it is characterised in that：Also include four times Blower fan system and five blower fan systems, four times blower fan system includes No. four blower fans, No. four blower fan air mixing devices and No. four blower fans Quadrangle tangential circle passage, outlet and the inlet communication of No. four blower fans of No. four blower fan air mixing devices, the outlet of No. four blower fans with four times Blower fan quadrangle tangential circle channel connection, No. four blower fan quadrangle tangential circle passages are arranged on the middle and upper part of Industrial Boiler, five blower fan systems Including No. five blower fans, No. five blower fan air mixing devices and No. five blower fan corner combs, the outlet of No. five blower fan air mixing devices and five The inlet communication of secondary blower fan, the outlet of No. five blower fans is connected with No. five blower fan corner combs, and No. five times blower fan corner comb is arranged on The bottom of Industrial Boiler.