CN206229145U - Multi-functional superposition flue gas advanced purification system - Google Patents

Abstract

The purpose of this utility model is to provide a kind of multi-functional superposition flue gas advanced purification system, and it can make flue gas reach deep purifying, reduce the discharge of pollutant.The multi-functional superposition flue gas advanced purification system includes at least one module, the module includes Unit at least one, the unit includes N number of purifier and smoke temperature reducer, dew trap setting, N number of purifier divides into first pass purifier successively according to flow of flue gas direction, second time purifier, ..., N compiles purifier, N is more than or equal to 3, after flue gas is by the superposition purification of N number of purifier, lowered the temperature by the smoke temperature reducer again, dew therein is caught by dew trap setting again, wherein, flue gas carries out deep purifying in each purifier to pollutant.

Description

Multi-functional superposition flue gas advanced purification system

Technical field

The utility model is related to flue gas purification system, more particularly to industrial furnace and thermal power plant gas cleaning system System.

Background technology

" AQI " in most of China area is higher than international 3-4 times of atmosphere pollution standard, wherein fire coal boiler fume discharge Pollutant occupy about 40%.

In January, 2016, China was proposed coal-fired boiler in power plant flue gas " minimum discharge standard ", and that was promulgated than 2014 is special Discharge standard is strictly many.Standard is as follows：

According to higher limit, with the PM original concentrations in flue dust as 20000mg/m³Calculate, its removal efficiency must reach More than 99.95%；With the SO in flue gas₂Original concentration is 2000mg/m³Calculate, its removal efficiency must reach more than 98.25%； With the NO in flue gas_XOriginal concentration is 1000mg/m³Calculate, its removal efficiency must reach more than 95%.

But current flue gas purifying technique both domestic and external is " single function series connection purification technique ", highest removal efficiency：Flue dust It is 98~99%, SO₂It is≤98%, NO_XIt is≤90%, it is impossible to reach " minimum discharge " limit value.

The flue gas pollutant emission limit of China is from " the especially discharge " in July, 2014 to " the ultralow row in January, 2016 Put ", standard has just been rewritten in only short 18 months, however not excluded that do not cross how long its standard can also rewrite.

According to above standard and the corresponding removal efficiency analysis for reaching, must carry out that " depth is net to the pollutant control of flue gas Change processes " can be only achieved minimum discharge " standard.

Utility model content

The purpose of this utility model is to provide a kind of multi-functional superposition flue gas advanced purification system, and it can reach flue gas Deep purifying, reduces the discharge of pollutant.

A kind of multi-functional superposition flue gas advanced purification system includes at least one module, and the module includes that at least one is single Unit, the unit includes N number of purifier and smoke temperature reducer, dew trap setting, and N number of purifier is according to flue gas stream Dynamic direction divide into successively first pass purifier, second time purifier ..., N compile purifier, N is more than or equal to 3, After flue gas is by the superposition purification of N number of purifier, then lowered the temperature by the smoke temperature reducer, then caught wherein by dew trap setting Dew, wherein, flue gas carries out multi-functional superposition deep purifying in each purifier to pollutant.

The further feature of described multi-functional superposition flue gas advanced purification system is, the pollutant include dust and SO₂、NO_X、VOC_s, Hg, harmful H₂O。

The further feature of described multi-functional superposition flue gas advanced purification system is that the first pass purifier includes Flat thin type undergauge clarifier long, the flat thin type undergauge clarifier long includes section converging transition and connects the small of section converging transition The flat thin type undergauge section long at end, the flat thin type undergauge segment length long is more than 5m and is configured with spray equipment, the flue gas being cleaned From the port of export discharge of the flat thin type undergauge section long.

The further feature of described multi-functional superposition flue gas advanced purification system is that second time purifier includes Coning purifier with the coning part in outer barrel and outer barrel, the coning part provides taper exhaust gases passes and taper The conveyor screw of arrangement in exhaust gases passes, and spray equipment is configured with, so that flue gas sprays into multifunctional ceiling while entering coning body Liquid is received, makes the further speedup of flue gas and rotation, carry out multifunctional purifying.

The further feature of described multi-functional superposition flue gas advanced purification system is that the 3rd time purifier is net depth Change device, deep purifier includes the sieve plate group in outer barrel and outer barrel, and sieve plate group is included on the face in flow of flue gas direction The left-hand sieve plate and dextrad sieve plate of interlaced arrangement, and the undergauge of each sieve plate is not more than 10%, and spray equipment is configured with, so that Flue gas enters also has absorbing liquid spray cleaning simultaneously.

The further feature of described multi-functional superposition flue gas advanced purification system is the smoke temperature reducer including cold But the fluid cooling tube of flue gas or apply cooled flue gas cold air agent device.

The further feature of described multi-functional superposition flue gas advanced purification system is multiple lists in each module Unit is set up in parallel, and shares a gas approach gate and an exhanst gas outlet gate.

The further feature of described multi-functional superposition flue gas advanced purification system is that multiple modules are set up in parallel, often Module described in one has independent gas approach gate and independent exhanst gas outlet gate.

The further feature of described multi-functional superposition flue gas advanced purification system is that N number of clarifier is by spray Multifunctional absorption liquid carrys out the hydrofilter of purifying smoke, and the Multifunctional absorption liquid energy is purified and absorbed and contains SO simultaneously₂、NO_X、 VOC_s, Hg solution or turbid liquid.

The further feature of described multi-functional superposition flue gas advanced purification system be the system also include lime-ash settling tank, Filtering pond and new liquid pool, the lime-ash settling tank be used to collecting the lime-ash that is carried by spray water droplet from the module and Grain, the absorbing liquid that part does not fully absorb that also has of the lime-ash settling tank discharge is precipitated into filtering pond, the filtering The portion filtrate in pond drains into new liquid pool, is changed into new for being transported to the absorbing liquid that the system purified for absorbent to be dissolved Liquid；Another part filtrate in the filtering pond is directly by being pumped into the system.

Multi-functional superposition flue gas advanced purification system energy flue dust SO of the present utility model₂、NO_X、VOC_sDeng organic volatile, The heavy metals such as Hg, are carried out multi-functional simultaneously in first pass, second time, the 3rd time, the 4th time ... superposition flue gas purifying equipment Purify repeatedly.Together with after multipass time multifunctional purifying technique, the pollutant of remaining is last with the flue gas entrance of a large amount of water smokes Multifunctional dirt-removing, except wet purification and technique before, flue gas is cooled down, allow flue gas cleaning system internal condensation remove, make cigarette The white smoke of chimney mouthful discharge is reduced.

Whole system has many block combiners to form, and each module has multiple units to be combined into a module, and maintenance is protected When supporting, each module or each unit Safe withdrawing from system separate with system, so that flue gas deep purifying and can more set When standby maintaining is repaired, the normal operation of without prejudice to boiler controller system, it is ensured that the long-term operation ratio 100% of big system.

Brief description of the drawings

The above and other feature of the present utility model, property and advantage will be by with reference to the accompanying drawings and examples Description and become readily apparent from, wherein：

Fig. 1 is that the cleaning equipment of the multi-functional superposition flue gas advanced purification system of one embodiment of the present utility model is interval Horizontal type superposition purification schematic diagram.

Fig. 2 is that the cleaning equipment of the multi-functional superposition flue gas advanced purification system of one embodiment of the present utility model is interval Vertical superposition purification schematic diagram.

Fig. 3 is the one of module of the multi-functional superposition flue gas advanced purification system of one embodiment of the present utility model The system architecture combination floor plan schematic diagram of individual unit.

Fig. 4 is the vertical sectional view of Fig. 3.

Fig. 5 is the 300MW (1000T/ of the multi-functional superposition flue gas advanced purification system of one embodiment of the present utility model H) the schematic diagram of boiler controller system (by 10 block combiners).

Fig. 6 is a module of the multi-functional superposition flue gas advanced purification system of one embodiment of the present utility model (100T/H boilers) combination diagram.

Before Fig. 7 is the dew catcher of multi-functional superposition flue gas advanced purification system of one embodiment of the present utility model Heat sink schematic diagram.

Fig. 8 A are the structural representation of the flat thin type undergauge clarifier long of one embodiment of the present utility model.

Fig. 8 B are the sectional view of the line A-A along Fig. 8 A.

Fig. 9 is the structural representation of an exemplary coning purifier device.

Figure 10 A are an exemplary structural representation with the deep purifier for intersecting sieve plate.

Figure 10 B are the profiles of each A-A sections along Figure 10 A.

Figure 10 C are the profiles of each B-B sections along Figure 10 A.

Specific embodiment

With reference to specific embodiments and the drawings, the utility model is described in further detail, elaborates in the following description More details are in order to fully understanding the utility model, but the utility model obviously can be described with various different from this Other manner is implemented, and those skilled in the art can be in the case of without prejudice to the utility model intension according to practical application feelings Condition is made similar popularization, is deduced, therefore should not limit protection domain of the present utility model with the content of this specific embodiment.

Multi-functional superposition flue gas advanced purification system is as shown in figure 1, not purified flue gas 15 enters lateral stacking first All over purifier 11, the flue gas purified by first pass enters second time purifier 12, by second time purifier 12 Flue gas enters the 3rd time purifier 13, and the 4th time purifier 14 ... ... is entered by the 3rd time flue gas of purifier 13, If necessary, more purifiers can be set.Reached by the purifying rate of flue gas after the superposition purification of multipass time it is high, can To meet the requirement of " flue gas minimum discharge ".As shown in figure 1, flue gas cool-down can set before last one purifier Device 39.

The workflow diagram of multi-functional superposition flue gas advanced purification system as shown in Figure 2 is identical, simply its flow of flue gas Mode is changed to the vertical upper and lower type of flow by transverse plane.

A system knot for unit in the multi-functional superposition flue gas advanced purification system for further describing as shown in Figure 3 Structure combination floor plan schematic diagram, import flue gas 15 enters " flat thin type undergauge clarifier long " 31, wherein by many nozzles pair Flue gas carries out first pass spray removing dirt, SO₂、NO_X、VOC_s, the pollutant such as Hg, connector 37 is then passed in and out by first flue Into " coning purifier device " 32, flue gas is carried out second time superposition spray cleaning, relayed at " coning purifier device " 32 Continue to relatively fine PM and SO₂、NO_X、VOC_s, the pollutant such as Hg remove, through the flue gas after second time spray superposition purification by the Two flues import and export connector 38 carries out the 3rd time superposition purification into " deep purifier " 33 with intersection sieve plate, makes cigarette The dust of more tiny below PM1 in gas, more rare SO₂、NO_X、VOC_s, Hg is purged.Can also if necessary be further added by Superposition purification all over time, more than three times or for several times to gas cleaning after, the pollutant in flue gas remains little.If reached Purifying rate higher, will be carried out " fine purifying " to flue gas；If it is desired that smoke gas fine purification to reach its purifying rate ultimate attainment, must also Must be by comprising superfine mist and clouds and more rare SO₂、NO_X、VOC_s, the pollutant such as Hg water smoke remove, these water smokes are by multipass Secondary to be superimposed spray cleaning and produce, the moisture (i.e. humidity) in flue gas is high and low related to flue-gas temperature, for example, one In secondary test, the water that (absolute humidity) is included at 60 DEG C is 130.1g/m³, and the water included at 20 DEG C is 17.3g/m³, surpass Saturation 112.8g/m³, and when 0 DEG C of atmospheric temperature, the water of saturation only has 4.8g/m³, over-saturation amount reach 125.3g/m³, this When part moisture leaves throat, when as relatively low such as temperature such as 0 DEG C, substantial amounts of white vapor smog, dirt therein will be distributed Dye thing, in company with arranging to air, is that the part moisture is made it shift to an earlier date the removal that condensed in flue gas purification system by this, can just be reduced big The concentration of AQI in gas.Thus flue gas is made to enter smoke temperature reducer 39 after leaving deep purifier 33.Flue gas cool-down is set to condense. Flue gas cool-down has several ways：One is to inject cooling agent in this place, and another way is the fluid cooling tube for setting cooled flue gas (heat exchanger tube), utilizes the heat in flue gas with absorption of fluids, both plays energy-saving effect, flue gas cool-down is condensed again, smoke-purifying Gas is acted on.

Fig. 8 A are the structural representation of an exemplary flat thin type undergauge clarifier 31 long, and Fig. 8 B are the line A-A along Fig. 8 A Sectional view, the arrow in figure represents flow of flue gas direction as the arrow in Fig. 9, Figure 10 B, Figure 10 C.Flat thin type undergauge long Clarifier 31 includes section converging transition 310, flat thin type undergauge section 311 long and ash bucket 312, the small end of section converging transition 310, ash The big end of bucket 312 is connected respectively with the two ends of flat thin type undergauge section 311 long, and spray dress is set in flat thin type undergauge section 311 long 3100 are put, so that the solution Forced Mixing sprayed in dust, dirt and spray equipment 3100 in flue gas.Flat thin type undergauge section long 311 length is more long, and length is more than 5m, and the flue gas being cleaned can so make from the end discharge of flat thin type undergauge section 311 long Very resistance is smaller simultaneously soon to obtain flue gas flow rate, and in 20m/s or so, flue gas resistance is arrived such as velocity of flue gas in 120Pa 150Pa, resistance very little, energy consumption is relatively low.

Fig. 9 is the structural representation of an exemplary coning purifier device 32, and it is included in outer barrel 320 and outer barrel Cone-type spiral part 321, cone-type spiral part 321 includes the taper exhaust gases passes 3210 of butt and in taper exhaust gases passes The conveyor screw 3211 of setting, conveyor screw can be extended in the shape of a spiral with piece volume morphing.Outer barrel 320nei is configured with spray equipment 3200, so that flue gas sprays into Multifunctional absorption liquid while entering cone-type spiral part 321, flue gas is further carried out multi-functional Purification.Cone-type spiral part 321 not only makes the flue gas can accelerate flow velocity, and it can be allowed to rotate, and forces flue gas dirt and spray equipment 3200 solution for spraying are more fully mixed, and ash bucket 322 is equipped with the bottom of outer barrel 320.

Figure 10 A are the structural representation of an exemplary deep purifier 33, and Figure 10 B are that each A-A sections are cutd open in Figure 10 A Face figure, Figure 10 C are the profiles of the B-B sections along Figure 10 A.Deep purifier 33 includes framework 330 and is set in framework 330 The sieve plate group 331 put, sieve plate group 331 includes multiple rows of sieve plate, and the water conservancy diversion direction of row's sieve plate 3310 is left-hand (on A-A directions), Abbreviation left-hand sieve plate, the flue gas water conservancy diversion direction of adjacent row sieve plate 3311 is abbreviation dextrad sieve plate to the right (on B-B directions) 3311.Left-hand sieve plate 3310 and dextrad sieve plate 3311 interlaced arrangement, the contracting of each sieve plate 3311,3310 in the flow direction of the flue gas Footpath is less than 10%, and flue gas cross at left-hand sieve plate 3310, the outlet of dextrad sieve plate 3311 is disturbed and mixed strongly, is hindered Power less, but is disturbed strong so that flue gas reaches the purpose of deep purifying.Sieve plate group 331 can arrange in multilayer manner, Spray equipment can be set between the layers.

It is an exemplary smoke temperature reducer 39 in Fig. 7, after flue gas passes into cooling device 39 by the direction of arrow 45 Low-temperature flue gas 46 discharge.The fluid 313 of cooled flue gas is imported by the entrance 313 of cooling device water inlet manifold 311, into cooling After device heat exchanger tube 310 absorbs the heat in flue gas, exported by cooling fluid after collecting via cooling device outfall sewer 312 314 discharges.Cooled low-temperature flue gas 46 are expelled to dew trap setting 34, and the dew in flue gas more than absolute humidity is caught The cleaner discharge system of flue gas 16 is entered into air afterwards.

In order to improve purifying rate, in domestic and international conventional art the venturi of the flue gas purifying equipment of single function series connection with it is porous Plate resistance is from 4000Pa to 20000Pa.

Due to multi-functional multipass time superposition purification, the drag overall requirement of whole system be designed to it is very low, in order to reduce many work( The resistance of cleaning system can be superimposed, the utility model devises " flat thin type undergauge clarifier long " 31 and " coning clarifier " 32.

Equipment resistance of the present utility model is as shown in the table：

Vertical sectional view " A-A " section view of figure 3 above is illustrated in figure 4, flue gas 15 enters flat thin with conventional flow velocity in figure After shape undergauge clarifier 31 long, because necking sectional area is reduced, cigarette speed increases to 10m/s-40m/s, up to several meters to tens of Under rice undergauge spray effect, dust and SO₂、NO_XEtc. first pass multifunctional purifying is carried out, then via first and second purifier it Between passage 37 enter coning clarifier 32, carry out second time multi-functional superposition purification, flue gas passes through coning body in the purifier 321, it is accelerated rotation by dust, SO₂、NO_XMake second superposition purification Deng pollutant, then flue gas enters deep purifier 33, what the utility model was configured is the deep purifier 33 (can also be the clarifier of other structures) of the structure of sieve plate 331 to cigarette Gas makees third time superposition deep purifying, the 4th time, the 5th time ... multi-functional superposition purification can also be carried out if desired, most Enter smoke temperature reducer 39 afterwards, dew catcher 34 is entered after making smoke condensation, a large amount of dews in flue gas can be intercepted In cleaning system, the flue gas of discharge is set to reduce white smoke.

Multi-functional superposition purification process system 300MW (1000T/H) boiler controller system 10 of one embodiment as shown in Figure 5 Module 501~510 is combined as a system schematic, and heavy line is flue gas 15 in figure, and each module flue gas is by gas approach gate 519 control with exhanst gas outlet gate 520.A certain module can be exited safely in systems when needing repairing, and without prejudice to its Its module is normally run in systems, and the continuous operation ratio of unit safety can throughout the year keep 100%.

When the new liquid 515 of the absorbing liquid of pollutant is input into individual module using liquid 516 with circulation fluid by pump in flue gas, also by inhaling Receiving the new liquid 515 of liquid and circulation fluid utilizes the valve 521 of liquid 516 to control, and can adjust flow or completely cut off and exit module System is repaired, the Safe withdrawing of module or to be incorporated to system particularly significant.For example, Chinese environmental protection rules and regulations coal-burning power plant machine Group does not allow to set by-pass flue, if flue gas purification system any position breaks down, it is necessary to stops unit operation and (stops Generate electricity), this can cause fatal harm and loss to any one power plant, and the utility model is solved in the method for block combiner The insurmountable problem of conventional art, and floor space is also smaller than traditional purification techniques occupation area of equipment.

The utility model uses liquid absorption method, PM and SO in purifying smoke₂、NO_X、VOC_s, the pollutant such as Hg when, cigarette Above-mentioned a large amount of lime-ash and particle in gas 15 are carried by spray water droplet, and by pipe influx to lime-ash settling tank 512, its lime-ash sinks There is chemical absorbing liquid (agent) 518 that part does not fully absorb still available in drop pond 512, so being carried out by filtering pond 514 Precipitation, portion filtrate removes new liquid pool 513, absorbing liquid (agent) 518 is dissolved and is changed into the new liquid 515 of absorbing liquid and is removed system purification, another Part can be recycled, and the part recycles liquid 516 by pump input system, when the molten water of the absorbing liquid of new liquid pool is inadequate, Part supplement water 517 can be supplemented.

As shown in fig. 6, a block diagram for module of the multi-functional superposition flue gas advanced purification system for one embodiment. In the module by flat thin type undergauge clarifier 31611 long, coning multi-functional cleaner 32612, deep purifier 33613 ... Deng smoke temperature reducer 39614, one unit of composition of dew catcher 34615.By flat thin type undergauge clarifier 31621 long, cone Rotation multi-functional cleaner 32622, deep purifier 33623 ... etc., smoke temperature reducer 39624, dew catcher 34625 One unit of composition.By flat thin type undergauge clarifier 31631 long, coning multi-functional cleaner 32632, deep purifier 33633rd ... etc., smoke temperature reducer 39634, dew catcher 34635 constitute a unit.So combined by several units Into a module, i.e., one unit number of module can be three or more or it is less.

It is shown in the figure 7, the dew of the multi-functional superposition flue gas advanced purification system of one embodiment of the present utility model Smoke temperature reducer 39614,39624,39634 in the module set before catcher 34615,34625,34635, cools down cigarette in figure The fluid 313 of gas is imported by cooling device water inlet manifold 311, after absorbing the heat in flue gas into cooling device heat exchanger tube 310, Discharged by cooling fluid outlet 314 after collecting via cooling device outfall sewer 312.

Flue gas, will be in low temperature saturation state by entering dew catcher 34615,34625,34635 after above-mentioned cooling Supersaturation water point in flue gas includes that pollutant catches, and allows fume-dehydrating to purify, and the flue gas of high purification is entered air.

Although the utility model is disclosed as above with preferred embodiment, its be not for limiting the utility model, it is any Those skilled in the art are not being departed from spirit and scope of the present utility model, can make possible variation and modification.Cause This, every content without departing from technical solutions of the utility model, according to technical spirit of the present utility model to above example institute Any modification, equivalent variations and the modification made, each fall within the protection domain that the utility model claim is defined.

Claims (6)

1. it is multi-functional to be superimposed flue gas advanced purification system, it is characterised in that including at least one module, the module is included at least One unit, the unit includes N number of purifier and smoke temperature reducer, dew trap setting, and N number of purifier is logical The hydrofilter that spray Multifunctional absorption liquid carrys out purifying smoke is crossed, the Multifunctional absorption liquid energy is purified simultaneously and absorption contains SO₂、NO_X、VOC_s, Hg solution or turbid liquid, according to flow of flue gas direction divide into successively first pass purifier, second time it is net Makeup puts, until N compiles purifier, N is more than or equal to 3, after flue gas is by the superposition purification of N number of purifier, then by the flue gas Heat sink is lowered the temperature, then catches dew therein by dew trap setting, wherein, flue gas is in each purifier to pollution Thing carries out multi-functional superposition deep purifying；

The first pass purifier includes flat thin type undergauge clarifier long, and the flat thin type undergauge clarifier long includes section gradually The flat thin type undergauge section long of the small end of contracting section and connection section converging transition, the flat thin type undergauge segment length long is more than 5m and matches somebody with somebody Spray equipment is equipped with, port of export discharge of the flue gas being cleaned from the flat thin type undergauge section long；

Second time purifier includes the coning purifier with the coning part in outer barrel and outer barrel, the coning portion Part provides the conveyor screw of arrangement in taper exhaust gases passes and taper exhaust gases passes, and is configured with spray equipment, so that flue gas enters Multifunctional absorption liquid is sprayed into while entering coning body, makes the further speedup of flue gas and rotation, carry out multifunctional purifying；

3rd time purifier is deep purifier, and deep purifier includes the sieve plate group in outer barrel and outer barrel, and sieve plate group includes The left-hand sieve plate and dextrad sieve plate of interlaced arrangement on the face perpendicular to flow of flue gas direction, and the undergauge of each sieve plate is not more than 10%, and spray equipment is configured with, so as to enter also have absorbing liquid spray cleaning simultaneously in flue gas.

2. it is multi-functional as claimed in claim 1 to be superimposed flue gas advanced purification system, it is characterised in that the pollutant includes ash Dirt and SO₂、NO_X、VOC_s, Hg, harmful H₂O。

3. it is multi-functional as claimed in claim 1 to be superimposed flue gas advanced purification system, it is characterised in that the smoke temperature reducer The device of the cold air agent of fluid cooling tube or applying cooled flue gas including cooled flue gas.

4. it is multi-functional as claimed in claim 1 to be superimposed flue gas advanced purification system, it is characterised in that many in each module The individual unit is set up in parallel, and shares a gas approach gate and an exhanst gas outlet gate.

5. it is multi-functional as claimed in claim 1 to be superimposed flue gas advanced purification system, it is characterised in that multiple modules are arranged side by side Set, each module has independent gas approach gate and independent exhanst gas outlet gate.

6. it is multi-functional as claimed in claim 1 to be superimposed flue gas advanced purification system, it is characterised in that the system also includes lime-ash Settling tank, filtering pond and new liquid pool, the lime-ash settling tank are used to collect the ash carried by spray water droplet from the module Slag and particle, the absorbing liquid that part does not fully absorb that also has of the lime-ash settling tank discharge are precipitated into filtering pond, institute The portion filtrate for stating filtering pond drains into new liquid pool, is changed into for being transported to the suction that the system is purified for absorbent to be dissolved Receive the new liquid of liquid；Another part filtrate in the filtering pond is directly by being pumped into the system.