CN205517198U - Alkaline process flue gas halogen desorption device - Google Patents
Alkaline process flue gas halogen desorption device Download PDFInfo
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- CN205517198U CN205517198U CN201620117334.1U CN201620117334U CN205517198U CN 205517198 U CN205517198 U CN 205517198U CN 201620117334 U CN201620117334 U CN 201620117334U CN 205517198 U CN205517198 U CN 205517198U
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- Prior art keywords
- alkali liquor
- flue gas
- led
- tail gas
- halogen
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- 239000003546 flue gas Substances 0.000 title claims abstract description 49
- 229910052736 halogen Inorganic materials 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 19
- -1 flue gas halogen Chemical class 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title claims abstract description 17
- 238000003795 desorption Methods 0.000 title abstract 5
- 239000003513 alkali Substances 0.000 claims abstract description 114
- 230000007246 mechanism Effects 0.000 claims abstract description 78
- 239000007789 gas Substances 0.000 claims abstract description 68
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000007921 spray Substances 0.000 claims abstract description 43
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 31
- 150000002367 halogens Chemical class 0.000 claims abstract description 31
- 238000012544 monitoring process Methods 0.000 claims abstract description 24
- 239000007787 solid Substances 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims description 62
- 230000005520 electrodynamics Effects 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- 230000003197 catalytic effect Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 abstract description 31
- 230000023556 desulfurization Effects 0.000 abstract description 25
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 24
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 abstract description 24
- 229910000041 hydrogen chloride Inorganic materials 0.000 abstract description 24
- 239000002351 wastewater Substances 0.000 abstract description 20
- 238000006243 chemical reaction Methods 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 13
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 abstract description 11
- 229910000040 hydrogen fluoride Inorganic materials 0.000 abstract description 11
- 150000003839 salts Chemical class 0.000 abstract description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 4
- 230000002378 acidificating effect Effects 0.000 abstract description 3
- 125000004122 cyclic group Chemical group 0.000 abstract description 3
- 239000012717 electrostatic precipitator Substances 0.000 abstract 2
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 238000002360 preparation method Methods 0.000 abstract 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 21
- 238000012360 testing method Methods 0.000 description 11
- 239000002253 acid Substances 0.000 description 10
- 238000010521 absorption reaction Methods 0.000 description 8
- 230000008859 change Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 238000007596 consolidation process Methods 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 3
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 235000011116 calcium hydroxide Nutrition 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 2
- 229910001634 calcium fluoride Inorganic materials 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to an alkaline process flue gas halogen desorption device. Be not used for the system of desorption halogen in the current boiler tail gas pipeline specially, lead to desulfurization waste water in halogen content on the high side. The utility model discloses a thick liquid preparation mechanism, atomizing injection mechanism and desorption efficiency monitoring mechanism, the alkali lye of thick liquid preparation mechanism production sprays to being arranged in the tail gas pipeline between air heater and electrostatic precipitator through atomizing injection mechanism, realizes the halogen rigid coupling and arranges outward. Add halogen desorption device on original tail gas pipeline, hydrogen chloride in alkali lye and the flue gas, hydrogen fluoride gas reaction forms solid salt, utilize electrostatic precipitator with the solid tail gas pipeline of discharging, effectively reduce the halogen content of flue gas, and then halogen content maintains lower level in ensureing desulfurization waste water, existing effect promotes the operational effect of desulfurization adsorption tower, fluorine ion in the reduction desulfurization waste water, chlorine ion concentration, the cyclic utilization who improves desulfurization waste water is rateed, water consumption reduction, the corruption harm of acidic material to the pipeline can also lighten.
Description
Technical field
This utility model relates to field of thermal power, is specifically related to halogen removing means.
Background technology
The halogen such as chlorine, fluorine is all the trace element in coal sample, it is converted into hydrogen chloride, hydrogen fluoride gas after burning, these gases can enter exhaust pipe along with boiler exhaust gas, and sequentially pass through economizer, SCR(selective catalytic reactor), AH(air preheater), ESP(electric cleaner), FGD(desulfuration absorbing tower) afterwards by arranging outside chimney.Flue gas is through desulfuration absorbing tower, and major part hydrogen chloride and fluohydric acid gas are absorbed removal, and enter desulfurization wastewater, causes the fluorine in desulfurization wastewater, cl concn to raise.After the fluorine in desulfurization wastewater, cl concn raise, both affected the desulfurized effect of desulfuration absorbing tower wet flue gas limestone-gypsum desulphurization system, and also can corrode the pipeline flowed through because desulfurization wastewater acidity becomes big, cause conduit failure, cause desulfurization wastewater not recycle, add water consumption.
Utility model content
In order to solve the deficiencies in the prior art, this utility model provides a kind of alkaline process flue gas halogen removing means, the alkali liquor of serosity preparing mechanism configuration sprays into exhaust pipe by atomized spray mechanism, and is consolidated by halogen before flue gas enters desulfuration absorbing tower, effectively reduces the content of halogen in desulfurization wastewater.
This utility model is accomplished by: a kind of alkaline process flue gas halogen removing means, including a removing means led to boiler exhaust gas pipeline, described tail gas pipeline includes selective catalytic reactor, air preheater and the electric cleaner being sequentially connected in series, removing means includes serosity preparing mechanism, atomized spray mechanism and removal efficiency mechanism for monitoring, the alkali liquor that described serosity preparing mechanism produces is sprayed in the tail gas pipeline being positioned between described air preheater and electric cleaner by atomized spray mechanism, it is achieved the affixed outer row of halogen.Original tail gas pipeline sets up halogen removing means, the alkali liquor of serosity preparing mechanism configuration sprays in the exhaust pipe before being positioned at electric cleaner by atomized spray mechanism, alkali liquor and the hydrogen chloride in flue gas, hydrogen fluoride gas reaction forms solid salt, utilize electric cleaner that solid salt is discharged exhaust pipe, effectively reduce the content of halogen of flue gas, and then guarantee that in desulfurization wastewater, content of halogen maintains reduced levels, the most effectively promote wet flue gas limestone--the operational effect of desulfurization of gypsum adsorption tower, reduce fluorion in desulfurization wastewater simultaneously, the concentration of chloride ion, improve the cyclic utilization rate of desulfurization wastewater, and then reduce desulfurization wastewater discharge capacity, fall low water consumption, corrosion-damaged to pipeline of acidic materials can also be alleviated.Alkali liquor is sprayed at the tail gas pipe section before being positioned at electric cleaner, both guarantee that the solid salt formed can be by the outer row of electric cleaner absorption, also ensure that the flue gas entering desulfuration absorbing tower has relatively low hydrogen chloride, hydrogen fluoride content, there is the advantages such as technique is simple, investment cost is low, floor space is little.
As preferably, described atomized spray mechanism includes a tube for transfusion being arranged on the shower nozzle in described tail gas pipeline and band transmission pump, described tube for transfusion one end is led to described serosity preparing mechanism, and the other end leads to described shower nozzle, it is achieved alkali liquor conveying is also sprayed in tail gas pipeline.It is delivered to alkali liquor preset sprinkling station by laying tube for transfusion, transmit pump and both play the effect of conveying alkali liquor, alkali liquor is also made to overcome loine pressure and be sprayed in tail gas pipeline, alkali liquor is broken up in thin pearl by described shower nozzle, shower nozzle is arranged on the upper wall of exhaust pipe, alkali liquor is scattered after holding the one section of region that can completely cover exhaust pipe, alkali liquor utilizes self gravitation to fall, make the exhaust pipe being capped is covered with thin pearl alkali liquor, by increasing the spray area of alkali liquor and improving the transformation efficiency of hydrogen chloride and fluohydric acid gas with the contact area of flue gas.
As preferably, described removal efficiency mechanism for monitoring includes being arranged on the induction apparatus in tail gas pipeline between described shower nozzle and described electric cleaner, and the halogen parameter that described serosity preparing mechanism obtains according to described induction apparatus adjusts alkali liquor parameter.Induction apparatus is arranged between shower nozzle and described electric cleaner in tail gas pipeline, hydrogen chloride after detecting flue gas and alkaline reaction, hydrogen fluoride gas retention amount, as the foundation of different formulations alkaline reaction effect, and then serosity preparing mechanism configuration optimization scheme can be passed through.
As preferably, described removal efficiency mechanism for monitoring includes the detection cabin in a band spray chamber, one is located at described spray top of chamber and the nozzle led to described tube for transfusion, described detection cabin is by an air inlet pipe introducing flue gas led to tail gas pipeline, and by an exhaustor flue gas entered and to be positioned between described air preheater and electric cleaner in tail gas pipeline, being provided with outside solid bottom described spray chamber and arrange mouth, described air inlet pipe and exhaustor lead to respectively in both sides, described spray chamber.Detection cabin provides confined space for flue gas and alkaline reaction, from exhaust pipe, dam partial fume by detection cabin, again the alkali liquor in tube for transfusion is sent into detection cabin by nozzle, make flue gas and alkaline reaction, the solid salt that reaction generates can utilize self gravitation to fall, and takes out by arranging mouth outside solid so that reaction result can be measured, by solid salt weight, component analysis being used as the foundation of different formulations alkaline reaction effect, and then by serosity preparing mechanism configuration optimization scheme.
As preferably, described air inlet pipe one end is led to spray chamber, the other end by the air intake branch of two band intake valves respectively air inlet and gas outlet with described selective catalytic reactor lead to.Detection cabin obtains have the flue gas of different technical parameters, to obtain more full and accurate detection data by leading to the air intake branch of diverse location.Two air intake branches air inlet and gas outlet with selective catalytic reactor respectively is led to, and the NOx content in both flue gases is inconsistent, and then research has the reaction difference between the flue gas of different NOx content and alkali liquor of the same race.
As preferably, described serosity preparing mechanism includes the feed bin of a band bobbing machine, the alkali liquor configuration case of one band mixing component, one auxiliary water tank and an outer defeated structure, described feed bin is located at below by one and the batcher of band belt conveyor configures case quantitative feed to described alkali liquor, described auxiliary water tank is led to described alkali liquor configuration case by the outlet pipe of a band control valve, described outer defeated structure includes that an outer comb led to described alkali liquor configuration case and middle part arrange the power pipe of medium pump, described outer comb is provided with control valve near described alkali liquor configuration case side, the alkali liquor flowed out from outer comb is delivered in described tube for transfusion by described medium pump.It is standby that feed bin is used for storing Calx, and it is standby that auxiliary water tank is used for storing blending water；Mixing component includes driving motor, puddler and paddle, and by Calx and water are sent into alkali liquor configuration case, recycling mixing component mixed material also configures alkali liquor；Alkali liquor in alkali liquor configuration case is delivered in tube for transfusion by power pipe, and medium pump provides carrying capacity for liquid conveying；Realize medium pump by control electrodynamic valve to lead to kinetic pump two ends；Bobbing machine is arranged on the lateral wall of feed bin, prevents Calx from luming because of longer-term storage.
As preferably, described serosity preparing mechanism includes a cleaning structure, described cleaning mechanism includes that the casing cleaning outer row that leads to described outer comb of arm led to described alkali liquor configuration case cleans pump housing cleaning arm that arm leads to described medium pump and cleans arm respectively with casing cleaning arm, outer row and discharge pipe line that the pump housing cleaning arm mate, and described casing cleaning arm, outer row cleans arm and pump housing cleaning arm is all led to water source by the control valve of correspondence.Cleaning structure, for removing the alkali liquor in pipeline, prevents the blocking pipeline because of alkali liquor sediment, when equipment is stopped transport or short-term suspends, can rapidly, automatically carry out being rinsed pipeline and draining.Casing cleans arm, outer row cleans arm and pump housing cleaning arm is realized by control valve respectively and alkali liquor configures the disconnected switching of the company between case, outlet pipe and medium pump, had both guaranteed that each portion can normally work, and has been cleaned flushing time out of service.When cleaning, seal by switching the control valve adjacent with parts to be cleaned, water in water source flows into parts to be cleaned by corresponding cleaning arm, and by arranging outside corresponding discharge pipe line, water source, cleaning arm, parts to be cleaned and discharge pipe line form clean water path.
As preferably, described power pipe is two, and connecting between described outlet pipe and tube for transfusion with parallel way, described medium pump is provided with the pump housing cleaning arm of correspondence, and described power pipe is respectively arranged at two ends with the preposition electrodynamic valve led to outer comb and the rearmounted electrodynamic valve led to described tube for transfusion.Two power pipes are connected between outlet pipe and tube for transfusion with parallel way so that each power pipe all can independently realize alkali liquor and send outside, it is ensured that during arbitrary power pipe fault, remain to normally be worked by another power pipe；Pump housing cleaning arm is two, and is connected with two power pipes respectively, it is achieved power pipe independently cleans；Medium pump realizes switching between mode of operation and cleaning mode by switching preposition electrodynamic valve and rearmounted electrodynamic valve, such as when needing cleaning medium pump, alkali liquor flow pipe is cut off by closing the electrodynamic valve at power pipe two ends, it is then turned on the pump housing cleaning arm led to water source, make cleaning water flow into medium pump, pass through to arrange outside discharge pipe line after the cleaning pump housing.
As preferably, described auxiliary water tank includes comb at the bottom of the water tank of a band control valve and the water inlet pipe led to water source and a band control valve, and described alkali liquor configuration case includes comb at the bottom of the casing of a band control valve.Auxiliary water tank provides configuration alkali liquor water for alkali liquor configuration case, water inlet pipe provides the configuration water of abundance for auxiliary water tank, it is positioned at comb at the bottom of the water tank bottom auxiliary water tank for emptying the residue water of auxiliary water tank, comb at the bottom of casing is for emptying the residue alkali liquor in alkali liquor configuration case, and the discharge pipe line corresponding with casing cleaning arm can be formed by comb at the bottom of described casing.
A kind of method of alkaline process flue gas halogen removing, it is characterised in that: the alkali liquor of serosity preparing mechanism configuration is sprayed in the tail gas pipeline being positioned between described air preheater and electric cleaner by atomized spray mechanism so that halogen consolidation is also removed by electric cleaner；Halogen consolidation, outer row's efficiency is obtained by the monitoring of removal efficiency mechanism for monitoring, serosity preparing mechanism adjusts alkali liquor formula according to the Monitoring Data of described removal efficiency mechanism for monitoring, atomized spray mechanism adjusts alkali liquor fountain height according to the Monitoring Data of described removal efficiency mechanism for monitoring, and then promotes halogen removal efficiency.Before desulfurization process, flue gas is carried out quenched, remove the hydrogen chloride in flue gas, hydrogen fluoride gas in advance, wet flue gas limestone--the operational effect of desulfurization of gypsum system will be promoted, reduce desulfurization wastewater chlorine ion concentration simultaneously, reduce desulfurization wastewater discharge capacity, moreover it is possible to alleviate hydrogen chloride, the hydrogen fluoride gas impact on pipeline.Additionally, detected the removal effect of hydrogen chloride, hydrogen fluoride gas in real time by removal efficiency testing agency, and adjust alkali liquor fountain height and formula in time, it is ensured that alkali liquor service efficiency.The consolidation salt that alkali liquor and hydrogen chloride, hydrogen fluoride gas gas are formed utilizes electric cleaner Adsorption, owing to electric cleaner is the existing equipment in tail gas pipeline, and serosity preparing mechanism can be external away from tail gas pipeline and the place with open space, and transmit alkali liquor by tube for transfusion, make existing equipment transformation relatively simple, there is the advantage that low cost, equipment are few, save installing space.
The beneficial effects of the utility model: set up halogen removing means on original tail gas pipeline, the alkali liquor of serosity preparing mechanism configuration sprays in the exhaust pipe before being positioned at electric cleaner by atomized spray mechanism, alkali liquor and the hydrogen chloride in flue gas, hydrogen fluoride gas reaction forms solid salt, utilize electric cleaner that solid salt is discharged exhaust pipe, effectively reduce the content of halogen of flue gas, and then guarantee that in desulfurization wastewater, content of halogen maintains reduced levels, the most effectively promote wet flue gas limestone--the operational effect of desulfurization of gypsum adsorption tower, reduce fluorion in desulfurization wastewater simultaneously, the concentration of chloride ion, improve the cyclic utilization rate of desulfurization wastewater, and then reduce desulfurization wastewater discharge capacity, fall low water consumption, corrosion-damaged to pipeline of acidic materials can also be alleviated.
Accompanying drawing explanation
Fig. 1 is this utility model structural representation；
nullIn figure: 1、Boiler，2、Selective catalytic reactor，3、Air preheater，4、Electric cleaner，5、Tail gas pipeline，6、Shower nozzle，7、Transmit pump，8、Tube for transfusion，9、Induction apparatus，10、Detection cabin，11、Nozzle，12、Air inlet pipe，13、Exhaustor，14、Mouth is arranged outside solid，15、Intake valve，16、Air intake branch，17、Bobbing machine，18、Feed bin，19、Mixing component，20、Alkali liquor configuration case，21、Batcher，22、Auxiliary water tank，23、Outlet pipe，24、Outer comb，25、Medium pump，26、Power pipe，27、Liquid valve，28、Casing cleaning arm，29、Outer row cleans arm，30、Pump housing cleaning arm，31、Preposition electrodynamic valve，32、Rearmounted electrodynamic valve，33、Water inlet pipe，34、Comb at the bottom of water tank，35、Comb at the bottom of casing.
Detailed description of the invention
Below in conjunction with specification drawings and specific embodiments, substantive distinguishing features of the present utility model is further described.
A kind of alkaline process flue gas halogen removing means as shown in Figure 1, the removing means led to boiler 1 tail gas pipeline 5 by one forms, described tail gas pipeline 5 includes selective catalytic reactor 2, air preheater 3 and the electric cleaner 4 being sequentially connected in series, removing means includes serosity preparing mechanism, atomized spray mechanism and removal efficiency mechanism for monitoring, the alkali liquor that described serosity preparing mechanism produces is sprayed to be positioned in the tail gas pipeline 5 between described air preheater 3 and electric cleaner by atomized spray mechanism, it is achieved the affixed outer row of halogen.In use, the alkali liquor of serosity preparing mechanism configuration is sprayed to be positioned in the tail gas pipeline 5 between described air preheater 3 and electric cleaner by atomized spray mechanism so that halogen consolidation is also removed by electric cleaner 4；Halogen consolidation, outer row's efficiency is obtained by the monitoring of removal efficiency mechanism for monitoring, serosity preparing mechanism adjusts alkali liquor formula according to the Monitoring Data of described removal efficiency mechanism for monitoring, atomized spray mechanism adjusts alkali liquor fountain height according to the Monitoring Data of described removal efficiency mechanism for monitoring, and then promotes halogen removal efficiency.
In practical operation, described atomized spray mechanism includes that a shower nozzle 6 being arranged in described tail gas pipeline 5 and a band transmit the tube for transfusion 8 of pump 7, described tube for transfusion 8 one end is led to described serosity preparing mechanism, and the other end leads to described shower nozzle 6, it is achieved alkali liquor conveying is also sprayed in tail gas pipeline 5.Shower nozzle 6 is arranged in tube for transfusion 8, the quantity of shower nozzle 6, position and shower nozzle 6 towards, spray regime, orifice diameter all should be according to practical situation depending on, also should adjust according to service condition, and then improve halogen row's efficiency affixed, outer, be regarded as specific embodiment of the utility model.Additionally, shower nozzle 6 is led to serosity preparing mechanism by tube for transfusion 8 so that serosity preparing mechanism can be arranged far from the void spaces of boiler 1 tail gas pipeline 5, only atomized spray mechanism need to be set on original tail gas pipeline 5, less on existing equipment impact；When tube for transfusion 8 length is shorter, and when the lift of medium pump 25 meets alkali liquor conveying, transmission pump 7 can be installed, simplify apparatus structure further, also can be considered as detailed description of the invention of the present utility model.
In practical operation, described removal efficiency testing agency includes implementation below:
Embodiment one: described removal efficiency mechanism for monitoring includes being arranged on the induction apparatus 9 in tail gas pipeline 5 between described shower nozzle 6 and described electric cleaner 4, the halogen parameter that described serosity preparing mechanism obtains according to described induction apparatus 9 adjusts alkali liquor parameter.Described induction apparatus 9 can be to test hydrogen chloride or the induction apparatus 9 of fluohydric acid gas in flue gas respectively, the installation site of described induction apparatus 9 can also be arranged in the exhaust pipe of electric cleaner 4 and desulfuration absorbing tower, also hydrogen chloride in flue gas, hydrogen fluoride content can be monitored, and then the data of acquisition atomized spray mechanism affixed halogen efficiency, and adjust alkali liquor configuration parameter offer foundation for serosity preparing mechanism.
Embodiment two: described removal efficiency mechanism for monitoring includes that described spray top of chamber and the nozzle 11 led to described tube for transfusion 8 are located in the detection cabin 10, in a band spray chamber, the air inlet pipe 12 that described detection cabin 10 is led to tail gas pipeline 5 by one introduces flue gas, and by an exhaustor 13 flue gas entered and to be positioned between described air preheater 3 and electric cleaner in tail gas pipeline 5, being provided with outside solid row's mouth 14 bottom described spray chamber, described air inlet pipe 12 and exhaustor lead to respectively in both sides, described spray chamber.Obtained the data of atomized spray mechanism affixed halogen efficiency by the solid matter mass and composition measuring analysis row's mouth 14 discharge from solid, and provide foundation for serosity preparing mechanism adjustment alkali liquor configuration parameter.Described air inlet pipe 12 one end is led to spray chamber, the other end by the air intake branch 16 of two band intake valves 15 respectively air inlet and gas outlet with described selective catalytic reactor 2 lead to, need to switch the intake valve 15 on each air intake branch 16 according to test, realize selectively to the test flue gas of spray chamber conveying different component, the position of leading to of described air intake branch 16 is not limited to such scheme, can also be led to other and can obtain the station with differentiation flue gas composition, be regarded as specific embodiment of the utility model.In addition, tube for transfusion 8 arranges control valve, this kind of removal efficiency testing agency can also be as test different ratio or the test platform of composition alkali liquor removing halogen efficiency, nozzle 11 is led to described tube for transfusion 8 by the detection pipe of a tape test valve, on the tube for transfusion 8 of described shower nozzle 6 side, a flow valve is set with tube for transfusion 8 junction at detection pipe, test valve and flow valve realizes shower nozzle 6 and nozzle 11 is used alone by controlling respectively, it is ensured that test platform can be with independent work.
When stating two kinds of embodiments on the implementation, both can select an employing, it is also possible to use according to practical situation, to guarantee measurement result reliability simultaneously.
In practical operation, described serosity preparing mechanism includes the feed bin 18 of a band bobbing machine 17, the alkali liquor configuration case 20 of one band mixing component 19, one auxiliary water tank 22 and an outer defeated structure, described feed bin 18 is located at below by one and the batcher 21 of band belt conveyor configures case 20 quantitative feed to described alkali liquor, described auxiliary water tank 22 is led to described alkali liquor configuration case 20 by the outlet pipe 23 of a band control valve, described outer defeated structure includes that an outer comb 24 led to described alkali liquor configuration case 20 and middle part arrange the power pipe 26 of medium pump 25, described outer comb 24 is provided with liquid valve 27 near described alkali liquor configuration case 20 side, the alkali liquor flowed out from outer comb 24 is delivered in described tube for transfusion 8 by described medium pump 25.In use, it is stored in feed bin 18 medium-slaking lime and sends in alkali liquor configuration case 20 by batcher 21, the water being stored in auxiliary water tank 22 is sent in alkali liquor configuration case 20 by outlet pipe 23, slaked lime and water conservancy mixing component 19 are mixed into uniform alkali liquor, and alkali liquor inputs tube for transfusion 8 under the propelling movement effect of power pipe 26.When tube for transfusion 8 pipeline is shorter, alkali liquor conveying just can be completed by power pipe 26.In practical operation, auxiliary water tank 22 can carry water by water pump, moreover it is possible to auxiliary water tank 22 is positioned above the position of described alkali liquor configuration case 20, utilizes the self gravitation of water to realize conveying.Described liquid valve 27 preferred version leads to alkali liquor configuration case 20 one end for being arranged on described outer comb 24, plays switch disconnection alkali liquor configuration case 20 and the effect of outer comb 24.
In practical operation, owing to the volume of alkali liquor configuration case 20 determines so that the alkali liquor volume of alkali liquor configuration case 20 single configuration determines, when needing the alkali liquor of differently configured concentration, guarantees that concentration of lye meets the requirements by controlling the input weight of slaked lime.In use, staff first passes through historical data to set the first configuration concentration of alkali liquor, alkali liquor at the uniform velocity sprays in tail gas pipeline 5 by atomized spray mechanism by certain flow, and monitored in real time by removal efficiency mechanism for monitoring fluohydric acid gas, the absorption efficiency of hydrogen chloride, when the fluohydric acid gas during removal efficiency mechanism for monitoring finds tail gas, hydrogen chloride absorption efficiency are less than preset lower limit value, adjust in the following manner:
1, when the alkali liquor of alkali liquor configuration case 20 single configuration has residue, fluohydric acid gas, hydrogen chloride absorption efficiency are improved by increasing alkali liquor fountain height at shower nozzle 6；
2, when the alkali liquor of alkali liquor configuration case 20 single configuration is finished and needs again to configure, the slaked lime weight sending into alkali liquor configuration case 20 by increasing batcher 21 improves concentration of lye, and then improves fluohydric acid gas, hydrogen chloride absorption efficiency.
In practical operation, the concentration of described alkali liquor can preset multiple concentration rank as required, is used for tackling fluohydric acid gas, the inefficient situation of hydrogen chloride absorption.When fluohydric acid gas, hydrogen chloride absorption efficiency are higher than the higher limit preset, can guarantee that fluohydric acid gas, hydrogen chloride absorption efficiency are in preset range all the time, to obtain preferable economy by reducing concentration of lye.
In practical operation, described serosity preparing mechanism can be with differently configured concentration and the alkali liquor of composition, for example with Ca (OH)2Or NaOH, its concentration range that can configure is 1% to 50%, with Ca (OH)2As a example by, the alkali liquor of 1% concentration is by the Ca (OH) of 1 part of weight2Being mixed to form with the water of 99 parts of weight, the alkali liquor of 50% concentration is by the Ca (OH) of 50 parts of weight2It is mixed to form with the water of 50 parts of weight.
Raw material forms Ca (OH) after mixing with water2Solution, with HF, HCl following chemical reaction of generation be:
Ca(OH) 2+2HF=CaF2+2H2O；
Ca(OH) 2+2HCl=CaCl2+2H2O；
Raw material forms NaOH solution after mixing with water, with HF, HCl following chemical reaction of generation is being:
NaOH+HF=NaF+H2O；
NaOH+HCl=NaCl+H2O；
Solids CaCl is formed by above-mentioned reaction2、CaF2、NaF、NaCl.The solids of larger particles deposits in being spray-dried reactor, by arranging outside solid；The solids of smaller particle is removed by cloth bag electric cleaner.
Additionally, Ca (OH) 2Solution can also be with SO2Generation chemical reaction:
Ca(OH) 2+SO2=CaSO3+H2O；
NaOH solution can also be with SO2Generation chemical reaction:
2NaOH
+SO2=Na2SO3+H2O；
The Na of solid-state is formed by above-mentioned reaction2SO3Or CaSO3, and then be beneficial to reduce the SO in flue gas2Content.
In practical operation, described serosity preparing mechanism includes a cleaning structure, described cleaning mechanism includes that the casing cleaning outer row that leads to described outer comb 24 of arm 28 led to described alkali liquor configuration case 20 cleans pump housing cleaning arm 30 that arm 29 leads to described medium pump 25 and cleans arm 29 respectively with casing cleaning arm 28, outer row and discharge pipe line that pump housing cleaning arm 30 mate, and described casing cleaning arm 28, outer row cleans arm 29 and pump housing cleaning arm 30 is all led to water source by the control valve of correspondence.Described power pipe 26 is two, and connect between described outlet pipe 23 and tube for transfusion 8 with parallel way, described medium pump 25 is provided with the pump housing cleaning arm 30 of correspondence, and described power pipe 26 is respectively arranged at two ends with the preposition electrodynamic valve 31 led to outer comb 24 and the rearmounted electrodynamic valve 32 led to described tube for transfusion 8.Described auxiliary water tank 22 includes that comb 34 at the bottom of the water tank of a band control valve and the water inlet pipe 33 led to water source and a band control valve, described alkali liquor configuration case 20 include comb 35 at the bottom of the casing of a band control valve.The cleaning operation of alkali liquor configuration case 20, outer comb 24 and medium pump 25 is illustrated by face respectively:
One, the cleaning to alkali liquor configuration case 20: when alkali liquor configuration case 20 needs to be cleaned operation, need to change to cleaning mode from mode of operation.When alkali liquor configuration case 20 is in mode of operation, liquid valve 27 and the control valve being positioned on outlet pipe 23 are opening, and the control valve that described casing cleans on comb 35 at the bottom of the control valve on arm 28 and casing is closed mode.Changed by following steps implementation pattern:
1. close liquid valve 27 and be positioned at the control valve on outlet pipe 23 so that alkali liquor configuration case 20 departs from from alkali liquor configuration flow；
2. opening the control valve on casing cleaning arm 28, external source enters alkali liquor configuration case 20 by casing cleaning arm 28, is cleaned rinsing；
3. open the control valve being located on comb 35 at the bottom of casing so that arrange outside the cleaning water in alkali liquor configuration case 20.
When alkali liquor configuration case 20 need from cleaning mode to working mode change time, by opening liquid valve 27 and being positioned at the control valve on outlet pipe 23 and the control valve closed at the bottom of the control valve on described casing cleaning arm 28 and casing on comb 35 realizes.
Two, the cleaning of external comb 24: when outer comb 24 needs to be cleaned operation, needs to change to cleaning mode from mode of operation.When outer comb 24 is in mode of operation, the preposition electrodynamic valve 31 on described liquid valve 27 and each power pipe 26 is opening, and described outer row cleans the control valve on arm 29 and the control valve on supporting discharge pipe line is closed mode.Changed by following steps implementation pattern:
1. close the preposition electrodynamic valve 31 on liquid valve 27 and each power pipe 26 so that outer comb 24 departs from from alkali liquor configuration flow；
2. opening the control valve on outer row's cleaning arm 29, external source cleans arm 29 by outer row and enters outer comb 24, is cleaned rinsing；
3. open to be located at and clean the control valve on the supporting discharge pipe line of arm 29 with outer row so that arrange outside the cleaning water in outer comb 24.
When actually used, described outer row cleans arm 29 with supporting discharge pipe line because setting up the two ends of comb 24 outside separately so that cleaning water can run through the outer comb 24 of cleaning whole piece, it is ensured that cleaning effect.When outer comb 24 need from cleaning mode to working mode change time, by the preposition electrodynamic valve 31 opened on liquid valve 27 and each power pipe 26 and close described outer row and clean the control valve on arm 29 and the control valve on supporting discharge pipe line realizes.
Three, the cleaning to medium pump 25: when medium pump 25 needs to be cleaned operation, needs to change to cleaning mode from mode of operation.When medium pump 25 is in mode of operation, the preposition electrodynamic valve 31 contacted with it and rearmounted electrodynamic valve 32 are opening, the control valve on described pump housing cleaning arm 30 and the control valve on supporting discharge pipe line and are closed mode.Changed by following steps implementation pattern:
1. close the preposition electrodynamic valve 31 with medium pump 25 series winding and rearmounted electrodynamic valve 32 so that medium pump 25 departs from from alkali liquor configuration flow；
2. opening the control valve on pump housing cleaning arm 30, external source enters medium pump 25 by pump housing cleaning arm 30, is cleaned rinsing；
3. open the control valve being located on the discharge pipe line supporting with pump housing cleaning arm 30 so that arrange outside the cleaning water in medium pump 25.
When medium pump 25 need from cleaning mode to working mode change time, by opening the preposition electrodynamic valve 31 with medium pump 25 series winding and rearmounted electrodynamic valve 32 and closing the described pump housing and clean the control valve on arm 30 and the control valve on supporting discharge pipe line realizes.
Claims (9)
1. an alkaline process flue gas halogen removing means, including a removing means led to boiler (1) tail gas pipeline (5), described tail gas pipeline (5) includes selective catalytic reactor (2), air preheater (3) and the electric cleaner (4) being sequentially connected in series, it is characterized in that removing means includes serosity preparing mechanism, atomized spray mechanism and removal efficiency mechanism for monitoring, the alkali liquor that described serosity preparing mechanism produces is sprayed in the tail gas pipeline (5) being positioned between described air preheater (3) and electric cleaner by atomized spray mechanism, it is achieved the affixed outer row of halogen.
A kind of alkaline process flue gas halogen removing means the most according to claim 1, it is characterized in that described atomized spray mechanism includes a tube for transfusion (8) being arranged on the shower nozzle (6) in described tail gas pipeline (5) and band transmission pump (7), described tube for transfusion (8) one end is led to described serosity preparing mechanism, the other end leads to described shower nozzle (6), it is achieved alkali liquor conveying is also sprayed in tail gas pipeline (5).
A kind of alkaline process flue gas halogen removing means the most according to claim 2, it is characterized in that described removal efficiency mechanism for monitoring includes being arranged on the induction apparatus (9) in tail gas pipeline (5) between described shower nozzle (6) and described electric cleaner (4), the parameter that described serosity preparing mechanism obtains according to described induction apparatus (9) adjusts alkali liquor parameter.
A kind of alkaline process flue gas halogen removing means the most according to claim 2, it is characterized in that described removal efficiency mechanism for monitoring includes the detection cabin (10) in a band spray chamber, one is located at described spray top of chamber and the nozzle (11) led to described tube for transfusion (8), described detection cabin (10) is by air inlet pipe (12) introducing flue gas led to tail gas pipeline (5), and by an exhaustor (13) flue gas entered and to be positioned between described air preheater (3) and electric cleaner in tail gas pipeline (5), it is provided with outside solid bottom described spray chamber and arranges mouth (14), described air inlet pipe (12) and exhaustor (13) lead to respectively in both sides, described spray chamber.
A kind of alkaline process flue gas halogen removing means the most according to claim 4, it is characterized in that described air inlet pipe (12) one end is led to spray chamber, the other end by the air intake branch (16) of two band intake valves (15) respectively air inlet and gas outlet with described selective catalytic reactor (2) lead to.
null6. according to the arbitrary described a kind of alkaline process flue gas halogen removing means of claim 1-5，It is characterized in that described serosity preparing mechanism includes the feed bin (18) of a band bobbing machine (17)、Alkali liquor configuration case (20) of one band mixing component (19)、One auxiliary water tank (22) and an outer defeated structure，Described feed bin (18) is located at below by one and the batcher (21) of band belt conveyor configures case (20) quantitative feed to described alkali liquor，Described auxiliary water tank (22) is led to described alkali liquor configuration case (20) by the outlet pipe (23) of a band control valve，Described outer defeated structure includes that an outer comb (24) led to described alkali liquor configuration case (20) and middle part arrange the power pipe (26) of medium pump (25)，Described outer comb (24) is provided with liquid valve (27) near described alkali liquor configuration case (20) side，The alkali liquor flowed out from outer comb (24) is delivered in described tube for transfusion (8) by described medium pump (25).
A kind of alkaline process flue gas halogen removing means the most according to claim 6, it is characterized in that described serosity preparing mechanism includes a cleaning structure, described cleaning mechanism includes casing cleaning arm (28) led to described alkali liquor configuration case (20), the outer row led to described outer comb (24) cleans arm (29), the pump housing led to described medium pump (25) cleans arm (30) and cleans arm (28) with casing respectively, outer row cleans arm (29) and the pump housing cleans the discharge pipe line that arm (30) mates, described casing cleaning arm (28), outer row cleans arm (29) and pump housing cleaning arm (30) is all led to water source by corresponding control valve.
A kind of alkaline process flue gas halogen removing means the most according to claim 7, it is characterized in that described power pipe (26) is two, and connect between described outlet pipe (23) and tube for transfusion (8) with parallel way, described medium pump (25) is provided with pump housing cleaning arm (30) of correspondence, and described power pipe (26) is respectively arranged at two ends with the preposition electrodynamic valve (31) led to outer comb (24) and the rearmounted electrodynamic valve (32) led to described tube for transfusion (8).
A kind of alkaline process flue gas halogen removing means the most according to claim 7, it is characterized in that described auxiliary water tank (22) includes that comb (34) at the bottom of the water tank of a band control valve and the water inlet pipe (33) led to water source and a band control valve, described alkali liquor configuration case (20) include comb (35) at the bottom of the casing of a band control valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620117334.1U CN205517198U (en) | 2016-02-05 | 2016-02-05 | Alkaline process flue gas halogen desorption device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620117334.1U CN205517198U (en) | 2016-02-05 | 2016-02-05 | Alkaline process flue gas halogen desorption device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536485A (en) * | 2016-02-05 | 2016-05-04 | 浙江浙能技术研究院有限公司 | Alkaline-process smoke halogen removal device and removal method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105536485A (en) * | 2016-02-05 | 2016-05-04 | 浙江浙能技术研究院有限公司 | Alkaline-process smoke halogen removal device and removal method |
| CN105536485B (en) * | 2016-02-05 | 2023-12-15 | 浙江浙能技术研究院有限公司 | Alkaline flue gas halogen removal device and removal method |
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