CN203123794U - SCR (selective catalytic reduction) denitration device for smoke gas of glass kiln - Google Patents
SCR (selective catalytic reduction) denitration device for smoke gas of glass kiln Download PDFInfo
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- CN203123794U CN203123794U CN 201220686178 CN201220686178U CN203123794U CN 203123794 U CN203123794 U CN 203123794U CN 201220686178 CN201220686178 CN 201220686178 CN 201220686178 U CN201220686178 U CN 201220686178U CN 203123794 U CN203123794 U CN 203123794U
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Abstract
The utility model discloses an SCR (selective catalytic reduction) denitration device for smoke gas of a glass kiln. The SCR denitration device comprises residual heat boilers and a denitration reactor, wherein the gas inlet end of an ammonia process SCR denitration reactor is communicated with a first residual heat boiler for receiving the smoke gas with the temperature which is reduced to 320-420 DEG C by heat exchange, and the exhaust end of the ammonia process SCR denitration reactor is communicated with a second residual heat boiler and used for exhausting the smoke gas after denitration into a chimney after the temperature is reduced to 150 DEG C-170 DEG C by heat exchange; and the denitration reactor comprises an ammonia injection grid, an ammonia-smoke gas mixer, a rectifier, a multi-layer catalyst bed and an ash blowing device thereof which are sequentially mounted in a smoke gas channel. The SCR denitration device disclosed by the utility model has a wide range of application, the power generation of the residual heat boilers is not affected, and both the residual heat utilization and the denitration are realized; regulating valves are arranged in all links in the whole system for ensuring the denitration effect and saving the using amount of ammonia; and the ash blowing device of the reactor adopts steam ash blowing, the pressure control is precise, steam of the residual heat boilers which are arranged in a matching manner is fully utilized, doors which can be opened and closed are arranged at interfaces of a denitration system with the residual heat boilers, and independent or simultaneous operation of the residual heat boilers can be ensured.
Description
Technical field
The invention belongs to environmental pollution improvement and air pollution control technique field, especially belong to a kind of and carry out the device of denitrating flue gas by SCR (SCR), particularly a kind of glass factory equipment for denitrifying flue gas.
Background technology
Nitrogen oxide is one of atmosphere major pollutants, has brought the harm of acid rain and photochemical fog.Along with the strictness day by day of China environmental protection law, rule and standard, SCR (SCR) technology of technology maturation, denitration rate height, non-secondary pollution will become the mainstream technology in China denitrating flue gas market gradually.The glass furnace of glass factory is as pollution sources of NOx discharging, reinforcement along with popular environmental requirement and consciousness, China relevant departments in 2011 issues " flat glass industry atmosphere pollutants emission standards ", in the standard clearly regulation NOx concentration of emission be 700mg/m
3(8% oxygen content) handled as not carrying out denitration, and existing glass furnace fume does not meet discharge standard and requires.All there is supporting waste heat boiler generating in existing most glass factories, and more good utilisation existing equipment, abundant energy savings are that glass furnace fume is handled the technical problem of always exploring therefore to select what method and apparatus denitration.
SCR(selective catalytic reduction, Selective Catalytic Reduction) be gas denitrifying technology preferably at present, it is method of denitration behind a kind of stove, is to utilize reducing agent (NH
3, urea) under the metallic catalyst effect, optionally generate N with NOx reaction
2And H
2O, rather than by O
2Oxidation, at present SCR technology mainly is divided into two kinds of ammonia process SCR and urea method SCR.Two kinds of methods all are to utilize ammonia to the restoring function of NOx, with NOx, mainly are NO wherein under the effect of catalyst, are reduced to the N less to atmospheric effect
2And H
2O.
The catalyst that uses in SCR is mostly with TiO
2Be carrier, with V
2O
5Or V
2O
5-WO
3Or V
2O
5-MoO
3For active component is made honeycomb fashion, board-like or corrugated three types of catalyst.The reaction temperature difference that different catalyst is suitable.If reaction temperature is on the low side, activity of such catalysts can reduce, and causes denitration efficiency to descend, and if catalyst continue operation at low temperatures and can make catalyst generation permanent damage; If reaction temperature is too high, NH
3Oxidized easily, the NOx growing amount increases, and also can cause the phase transformation of catalyst material, and activity of such catalysts is degenerated.At present, the SCR system adopts high temperature catalyst mostly both at home and abroad, the reaction temperature interval is 320 ℃～420 ℃, therefore must enter temperature to flue gas before flue gas enters denitrification apparatus controls, existing denitrification apparatus usually is equipped with flue gas heating or cooling device, to adapt to the needs of SCR denitrification apparatus.
Summary of the invention
The present invention discloses a kind of SCR denitrification apparatus of glass furnace fume according to the deficiencies in the prior art.The problem to be solved in the present invention provide a kind of more energy-conservation, with the SCR denitrification apparatus of the more collaborative coupling of each equipment of existing glass furnace.
The present invention is achieved through the following technical solutions:
The SCR denitrification apparatus of glass furnace fume comprises waste heat boiler and Benitration reactor, it is characterized in that: described Benitration reactor is ammonia process SCR Benitration reactor; The preceding inlet end of described ammonia process SCR Benitration reactor is communicated with first residual heat boiler for exchanging heat, the final vacuum end is communicated with second residual heat boiler for exchanging heat;
The described connection with first residual heat boiler for exchanging heat is that first waste heat boiler changing-over receipts glass furnace fume is imported ammonia process SCR Benitration reactor after heat exchange is cooled to 320～420 ℃;
The described connection with second residual heat boiler for exchanging heat is that second waste heat boiler will enter chimney by flue gas after the denitration of ammonia process SCR Benitration reactor after heat exchange is cooled to 150 ℃～170 ℃.
Described ammonia process SCR Benitration reactor comprises ammonia-spraying grid, ammonia-flue gas blender, rectifier and the multi-layer catalyst bed that is installed in successively in the exhaust gases passes, is provided with soot blower at every layer of catalyst bed.
Further described soot blower is communicated with the waste heat boiler steam outlet, and blowing grey steam pressure is 0.6～0.8MPa, blows ash during catalyst bed stressor layer 〉=400Pa, and catalyst bed stressor layer≤200Pa stops to blow ash.Described catalyst bed stressor layer is the flue gas pressures of catalyst bed inlet end face.
There is the valve of the unlatching the regulated size of flue gas checkout gear and checkout gear control at each flue gas import and export place in the further described SCR denitrification apparatus.
Above-mentioned SCR denitrification apparatus also comprises the ammonia feeding mechanism that is made of the connecting pipe between storage ammonia jar, liquefied ammonia delivery pump, liquefied ammonia evaporimeter, gas ammonia surge tank, ammonia thinning tank, ammonia recovery unit and each equipment.
Above-mentioned ammonia-spraying grid is made of the nozzle that is evenly arranged in the flue and be positioned on the same horizontal plane, and described nozzle bore is 8 millimeters of φ, and the ammonia jet velocity is 100～200m/s.Ammonia-spraying grid is in order to spray into a kind of device of flue uniformly through the ammonia of dilution behind the blower fan, and what of nozzle quantity are decided according to the ammonia spraying amount of nitrogen oxide needs in the flue gas in the ammonia-spraying grid.
Above-mentioned ammonia-flue gas blender is after ammonia sprays into flue, with ammonia and the mixed uniformly a kind of device of flue gas, concrete position is specifically considered according to flue deployment scenarios in the project, ammonia-flue gas blender hybrid element is stainless steel, by being fixed on the mixed cell internals in the mixing duct, make ammonia and flue gas produce the fluid cutting, shear, rotate and mix; Reach dispersion and well-mixed purpose between the fluid.
Above-mentioned rectifier is arranged in 1 meter position of ground floor catalyst bed front end, and described rectifier is formed by evenly being arranged on the exhaust gases passes that rhombus in the flue or triangle riser constitute.Rectifier is a kind of device that evenly arranges by catalyst behind the SCR reactor in order to enter at flue gas; from the equipment of flowing through of flue gas in proper order; rectifier is arranged on the front of catalyst; just flue gas earlier enters catalyst area through rectifier rectification after evenly again; rectifier is arranged at the bottom of the reactor inlet flue 1 meter position; flue gas is after the deflector rough segmentation; divide equally through rectifier again; rectifier is by rhombus; the triangle riser is formed exhaust gases passes, is conducive to the consolidationization of flow of flue gas; reduce flue gas washing away catalyst; steady flow condition; guard catalyst.
Above-mentioned catalyst bed has three layers, and 1 meter every layer thick, and the interval is 1.5 meters between each layer.
Above-mentioned Benitration reactor and waste heat boiler junction are provided with door to be opened/closed, and gate open to be opened/closed is normal to adopt sealable baffle door structure, cut off being connected of denitrating system and waste heat boiler when being used for accident condition, guarantee not influence waste heat boiler and move.
The flue gas detection system of with good grounds denitrating flue gas rate and tail gas amount of ammonia slip control ammonia spraying amount in the above-mentioned SCR denitrification apparatus.
Above-mentioned ammonia feeding mechanism can also comprise unload the ammonia tank car, the equipment such as pump and waste water pump of unloading.Storage ammonia jar with by the pump of unloading, fluid assembly and disassembly arm is connected with the factory external ammonia tank car that unloads, unloading ammonia compressor is connected with fluid assembly and disassembly arm with storage ammonia jar by pipeline, storage ammonia jar is connected with the liquefied ammonia evaporimeter by the liquefied ammonia delivery pump, can not need the liquefied ammonia delivery pump in the higher area of southern temperature, on the pipeline adjustment doors is housed between liquefied ammonia delivery pump and the liquefied ammonia evaporimeter, control gas ammonia flow, the liquefied ammonia evaporimeter is connected by pipeline with the gas ammonia surge tank, adjustment doors is housed on the connecting pipe, the ammonia thinning tank is connected with each equipment exhaust system by pipeline, and what system discharged delivers to plant area appointed place processing by the fire water dilution back that plant area comes by waste water pump without ammonia.
The gas ammonia surge tank is connected with ammonia-flue gas blender by pipeline, and control valve is housed on the pipeline, and ammonia-flue gas blender is connected with ammonia-spraying grid with the dilution blower fan by pipeline; Described gas approach baffle door is installed in waste heat boiler denitration interface, and gas approach baffle door and ammonia-spraying grid are connected the back by flue and are connected with ammonia-flue gas blender, and flue gas is flowed through and directly entered reactor behind ammonia-flue gas blender; Flue gas fairing, catalyst, soot blower are set in the reactor; Flue gas returns waste heat boiler through behind the reactor by the exhanst gas outlet baffle door.
In the above-mentioned whole device flow process, for ease of operation, for each link of ammonia control valve is arranged.
Catalyst consumption in the catalyst bed setting is generally 30～40m
3, variant because of glass factory's exhaust gas volumn and flue gas NOx content, the catalyst chemical life-span is variant, and a small amount of frit is very little to the influence of catalyst chemical life-span in the flue gas content.
Correct position is provided with adjustment doors between each equipment, when being used for the flue gas load fluctuation regulating system use the ammonia amount, guarantee NOx content and the amount of ammonia slip of denitration outlet.
Benitration reactor arranges and goes up near waste heat boiler that it is compact that ammonia-spraying grid and ammonia-flue gas blender is arranged, reduces the temperature drop that denitrification apparatus is imported and exported, and reduces the cogeneration heat loss.
For waste heat boiler, denitration gas approach, outlet are provided with baffle door, are used for cutting off denitrification apparatus and waste heat boiler, also can be used for regulating the cigarette air quantity.
The present invention is fit to all glass factory's glass furnace fumes and handles, and glass furnace fume is generally 90000～200000Nm
3/ h, NOx content is generally 2000～5000mg/Nm
3, reaction temperature satisfies 320～420 ℃.After the flue gas of glass furnace picked out by waste heat boiler, successively by entering the denitration of SCR reactor behind gas approach baffle door, ammonia-spraying grid, the ammonia-flue gas mixing arrangement, the flue gas after the denitration returned waste heat boiler by the exhanst gas outlet baffle door.Meanwhile, unload the ammonia tank car and by fluid assembly and disassembly arm liquefied ammonia is sent into storage ammonia tank stores, liquefied ammonia in the storage ammonia jar is delivered to the liquefied ammonia evaporimeter by the liquefied ammonia delivery pump and is become gas ammonia, the gas ammonia that comes out from the liquefied ammonia evaporimeter is through entering ammonia-spraying grid after by adjustment doors after the gas ammonia surge tank buffering, is linked to be a complete denitrating system with flue gas system.On the pipeline adjustment doors is housed between liquefied ammonia delivery pump and the liquefied ammonia evaporimeter, regulator solution ammonia evaporator liquid level and keep the loine pressure balance.Be provided with NOx concentration monitor point at denitration outlet, the adjustment doors on signal and the ammonia pipeline forms interlocking, and when the NOx change in concentration, adjustment doors can be adjusted aperture by signal.Because ammonia is dangerous goods, for the safety of system, is furnished with accessory system, as little subsystems such as nitrogen replacement, ammonia emptying, accident sprays.
Major advantage of the present invention is:
1, this device is applied widely, is applicable to all glass factory's glass furnaces.General 400～550 ℃ of the flue gas of glass furnace outlet, high-temperature flue gas enter denitrating system after being reduced to 320～420 ℃ of temperature that are fit to denitration through waste heat boiler, and the flue gas after denitration returns waste heat boiler and continues the heat exchange utilization.This denitrification apparatus does not influence waste heat boiler generating, reaches UTILIZATION OF VESIDUAL HEAT IN and the denitration purpose of neglecting neither.
2, each link is provided with control valve in the whole system, guarantees to reach denitration effect and saves the ammonia consumption.The denitration rate can reach 98% at the initial stage of putting into operation, and still can reach more than 80% in the later stage, and the ammonia utilization rate reaches 99%.
3, the reactor soot blower adopts steam soot blowing, pressure control accurately, blowing grey steam pressure is 0.6～0.8MPa, is up to 1.4MPa, blows ash during catalyst bed stressor layer 〉=400Pa, catalyst bed stressor layer≤200Pa stops to blow ash, guarantees to blow grey effect.The jet chimney connecting line is simple, and handled easily takes full advantage of the waste heat boiler steam that coupling arranges.
4, denitrating system and waste heat boiler interface are provided with door to be opened/closed, cut off denitrating system and waste heat boiler when being used for accident condition, guarantee not influence the waste heat boiler operation.
Description of drawings
Fig. 1 is denitration workflow schematic diagram of the present invention;
Fig. 2 is denitrification apparatus schematic diagram of the present invention.
Among the figure, the 1st, catalyst bed, the 2nd, rectifier, the 3rd, soot blower, the 4th, ammonia-flue gas blender, the 5th, spray ammonia pipeline, the 6th, ammonia-spraying grid, the 7th, baffle door, R are preceding inlet ends, F is the final vacuum end.
The specific embodiment
Further describe below by the present invention of embodiment; present embodiment only is used for the present invention is further detailed; but can not be interpreted as limiting the scope of the invention, those skilled in the art can make some nonessential improvement and adjustment belongs to the scope of protection of the invention according to the content of the invention described above.
In conjunction with Fig. 1 and Fig. 2.
Fig. 1 is denitration workflow schematic diagram of the present invention, and Fig. 2 is the denitrification apparatus schematic diagram.The SCR denitrification apparatus of glass furnace fume of the present invention comprises waste heat boiler and Benitration reactor, Benitration reactor is ammonia process SCR Benitration reactor, its preceding inlet end R be communicated with first waste heat boiler receive through heat exchange be cooled to 320～420 ℃ of flue gases, final vacuum end F is communicated with second waste heat boiler, and will enter chimney after heat exchange is cooled to 150 ℃～170 ℃ through flue gas after the ammonia process SCR denitration.
The ammonia process SCR Benitration reactor that the present invention adopts comprises ammonia-spraying grid 6, ammonia-flue gas blender 4, rectifier 2 and the multi-layer catalyst bed 1 that is installed in successively in the exhaust gases passes, is provided with soot blower 3 at every layer of catalyst bed 1.
Soot blower 3 is communicated with the waste heat boiler steam outlet, and blowing grey steam pressure is 0.6～0.8MPa, is up to 1.4MPa, blows ash during catalyst bed stressor layer 〉=400Pa, and catalyst bed stressor layer≤200Pa stops to blow ash.Utilize both energy savings of waste heat boiler steam, the connection nearby of equipment pipeline maximum possible, above-mentioned steam pressure and opening and closing pressure can realize blowing grey effect and energy savings best after deliberation.
There is the valve of the unlatching the regulated size of flue gas checkout gear and checkout gear control at each flue gas import and export place in the SCR denitrification apparatus.Above-mentioned flue gas detects with control device and adopts conventional equipment and require to regulate control according to different flue gas turnover amount controls.
The flue gas detection system of with good grounds denitrating flue gas rate and tail gas amount of ammonia slip control ammonia spraying amount in the SCR denitrification apparatus.Above-mentioned denitrating flue gas rate and the detection of tail gas amount of ammonia slip and control device and flue gas detection system coupling realize that the denitration rate can reach 98% at the initial stage of putting into operation, and reach more than 80% in the later stage, and the ammonia utilization rate reaches 99% requirement.
Ammonia-spraying grid 6 is made of the nozzle that is evenly arranged in the flue and be positioned on the same horizontal plane, and nozzle bore is 8 millimeters of φ, and the ammonia jet velocity is 100～200m/s.Ammonia-spraying grid 6 is in order to spray into a kind of device of flue uniformly through the ammonia of dilution behind the blower fan, and what of nozzle quantity are decided according to the ammonia spraying amount of nitrogen oxide needs in the flue gas in the ammonia-spraying grid.
Ammonia-flue gas blender 4 is after ammonia sprays into flue, with ammonia and the mixed uniformly a kind of device of flue gas, concrete position is specifically considered according to the flue deployment scenarios, ammonia-flue gas blender 4 hybrid elements are stainless steel, by being fixed on the mixed cell internals in the mixing duct, make ammonia and flue gas produce the fluid cutting, shear, rotate and mix; Reach dispersion and well-mixed purpose between the fluid.The described mixed cell internals that are fixed in the mixing duct are arranged on the various realization fluid cuttings in the mixing duct, in the fluid passage, the turbulent element of shearing, rotating and mix.
Rectifier 2 is arranged in 1 meter position of ground floor catalyst bed 1 front end, and rectifier 2 is formed by evenly being arranged on the exhaust gases passes that rhombus in the flue or triangle riser constitute.Rectifier 2 is a kind of devices that evenly arrange by catalyst behind the SCR reactor in order to enter at flue gas; from the equipment of flowing through of flue gas in proper order; rectifier 2 is arranged on the front of ground floor catalyst bed 1; just flue gas is earlier through entering catalyst area again after rectifier 2 rectifications evenly; rectifier 2 is arranged at the bottom of the reactor inlet flue 1 meter position; flue gas is after the deflector rough segmentation; divide equally through rectifier again; rectifier is by rhombus; the triangle riser is formed exhaust gases passes, is conducive to the consolidationization of flow of flue gas; reduce flue gas washing away catalyst; steady flow condition; guard catalyst.
As shown in Figure 2, catalyst bed 1 has three layers in apparatus of the present invention, and 1 meter every layer thick, and the interval is 1.5 meters between each layer.The catalyst consumption that arranges at catalyst bed 1 is generally 30～40m
3, variant because of glass factory's exhaust gas volumn and flue gas NOx content, the catalyst chemical life-span is variant, and a small amount of frit is very little to the influence of catalyst chemical life-span in the flue gas content.
Benitration reactor and waste heat boiler junction are provided with door to be opened/closed, and gate open to be opened/closed is normal to adopt sealable baffle door 7 structures, cut off being connected of denitrating system and waste heat boiler when being used for accident condition, guarantee not influence waste heat boiler and move.
The SCR denitrification apparatus also comprises the ammonia feeding mechanism that is made of the connecting pipe between storage ammonia jar, liquefied ammonia delivery pump, liquefied ammonia evaporimeter, gas ammonia surge tank, ammonia thinning tank, ammonia recovery unit and each equipment.The ammonia feeding mechanism can also comprise unload the ammonia tank car, the equipment such as pump and waste water pump of unloading.Storage ammonia jar with by the pump of unloading, fluid assembly and disassembly arm is connected with the factory external ammonia tank car that unloads, unloading ammonia compressor is connected with fluid assembly and disassembly arm with storage ammonia jar by pipeline, storage ammonia jar is connected with the liquefied ammonia evaporimeter by the liquefied ammonia delivery pump, can not need the liquefied ammonia delivery pump in the higher area of southern temperature, on the pipeline adjustment doors is housed between liquefied ammonia delivery pump and the liquefied ammonia evaporimeter, control gas ammonia flow, the liquefied ammonia evaporimeter is connected by pipeline with the gas ammonia surge tank, adjustment doors is housed on the connecting pipe, the ammonia thinning tank is connected with each equipment exhaust system by pipeline, and what system discharged delivers to plant area appointed place processing by the fire water dilution back that plant area comes by waste water pump without ammonia.
The gas ammonia surge tank is connected with ammonia-flue gas blender 4 by pipeline, and control valve is housed on the pipeline, and ammonia-flue gas blender 4 is connected with ammonia-spraying grid 6 with the dilution blower fan by pipeline; Described gas approach baffle door 7 be installed in waste heat boiler denitration interface namely before inlet end R, gas approach baffle door 7 is connected by flue with ammonia-spraying grid 6 and then is connected with ammonia-flue gas blender 4, flue gas is flowed through and is directly entered reactor behind ammonia-flue gas blender 4; Flue gas rectifier 2, catalyst bed 1, soot blower 3 are set in the reactor; Flue gas is through being that final vacuum end F returns waste heat boiler by exhanst gas outlet baffle door 7 behind the reactor.
In the above-mentioned whole device flow process, for ease of operation, for each link of ammonia control valve is arranged.
Correct position is provided with adjustment doors between each equipment, when being used for the flue gas load fluctuation regulating system use the ammonia amount, guarantee NOx content and the amount of ammonia slip of denitration outlet.
Benitration reactor arranges and goes up near waste heat boiler that it is compact that ammonia-spraying grid 1 and ammonia-flue gas blender 4 is arranged, reduces the temperature drop that denitrification apparatus is imported and exported, and reduces the cogeneration heat loss.
For waste heat boiler, denitration gas approach, outlet are provided with baffle door, are used for cutting off denitrification apparatus and waste heat boiler, also can be used for regulating the cigarette air quantity.
The present invention is fit to all glass factory's glass furnace fumes and handles, and glass furnace fume is generally 90000～200000Nm
3/ h, NOx content is generally 2000～5000mg/Nm
3, reaction temperature satisfies 320～420 ℃.After the flue gas of glass furnace picked out by waste heat boiler, successively by entering the denitration of SCR reactor behind gas approach baffle door 7, ammonia-spraying grid 6, the ammonia-flue gas mixing arrangement 4, the flue gas after the denitration returned waste heat boiler by exhanst gas outlet baffle door 7.Meanwhile, unload the ammonia tank car and by fluid assembly and disassembly arm liquefied ammonia is sent into storage ammonia tank stores, liquefied ammonia in the storage ammonia jar is delivered to the liquefied ammonia evaporimeter by the liquefied ammonia delivery pump and is become gas ammonia, the gas ammonia that comes out from the liquefied ammonia evaporimeter is through entering ammonia-spraying grid 6 after by adjustment doors after the gas ammonia surge tank buffering, is linked to be a complete denitrating system with flue gas system.On the pipeline adjustment doors is housed between liquefied ammonia delivery pump and the liquefied ammonia evaporimeter, regulator solution ammonia evaporator liquid level and keep the loine pressure balance.Be provided with NOx concentration monitor point at denitration outlet, the adjustment doors on signal and the ammonia pipeline forms interlocking, and when the NOx change in concentration, adjustment doors can be adjusted aperture by signal.Because ammonia is dangerous goods, for the safety of system, is furnished with accessory system, as little subsystems such as nitrogen replacement, ammonia emptying, accident sprays.
Case history
In certain Glass Co., Ltd., adopt denitrification apparatus of the present invention, idiographic flow is as follows:
The ammonia supply system disposes pipeline, instrument, valve supporting in ammonia bottle, nitrogen cylinder, ammonia evaporimeter, gas ammonia surge tank, ammonia mass flowmenter, ammonia control valve and the system.SCR denitrification apparatus area configurations has dilution blower fan, induced-draught fan, denitrification apparatus flue entrance baffle door, outlet damper door, ammonia-spraying grid, ammonia-flue gas blender, fairing, catalyst, flue gas monitoring system, each layer of catalyst that remarkable platform is set.Ammonia bottle and nitrogen cylinder periodic replacement, the ammonia in ammonia bottle system by the road enters the ammonia evaporimeter, and after evaporator evaporation, ammonia enters the gas ammonia surge tank, and ammonia is sent into ammonia-spraying grid through voltage stabilizing by mass flowmenter, control valve, ammonia-flue gas blender.
Flue gas picks out behind the waste heat boiler low temperature superheater, introduce denitrating system, successively flow through denitrification apparatus flue entrance baffle door, ammonia-spraying grid, ammonia-flue gas blender enters Benitration reactor, flue gas, ammonia gas mixture body are again through the flue deflector, flue gas-ammonia gas mixture enters catalyst area after the fairing rectification, nitrogen oxide under catalyst action in the flue gas and ammonia react generate the nitrogen G﹠W, the clean flue gas that removes the most of the nitrogen oxide is sent waste heat boiler low temperature superheater rear end back to through induced-draught fan, proceeds heat exchange.
Each layer of catalyst is provided with steam soot-blower, when rising to setting value 400Pa, blows the reactor catalyst stressor layer ash: open the steam soot blowing main valve, carry out 1～2 minute heating coil, hydrophobic after, open each layer again and blow grey switch valve catalyst is successively carried out steam blast, treat to close again when pressure drops to setting value 200Pa soot-blowing valve.At the low only 200mg/Nm of glass furnace dust content
3, viscosity is strong, granularity is little characteristics, between continuous operating period, adopt regular injection method, once the winding-up cycle is 12 hours, it is respond well to blow ash.
In experimentation, the entrance nitrogen oxide is stabilized in 3416mg/Nm
3(8% oxygen content), control spray ammonia control valve opening 33%, the outlet nitrogen oxide can be reduced to 149mg/Nm
3, be lower than glass industry environmental emission standard (700mg/Nm in 2014
3).
Reactor, flue appearance adopt the knitting blanket of 150mm alumina silicate to carry out the one-level insulation, and the knitting blanket of alumina silicate outside adopts the high temperature glass wool of 100mm to carry out the secondary insulation again, and through measuring, the insulation hull-skin temperature is 30～35 degree.
Experiment showed, and adopt present technique to carry out glass furnace SCR denitration, can with the intact combination of glass furnace power station waste heat boiler, neither influence cogeneration, reach the purpose that removes nitrogen oxide simultaneously, satisfy environmental requirement, namely be conducive to society and be of value to enterprise again.
Claims (10)
1. the SCR denitrification apparatus of a glass furnace fume comprises waste heat boiler and Benitration reactor, it is characterized in that:
Described Benitration reactor is ammonia process SCR Benitration reactor; The preceding inlet end of described ammonia process SCR Benitration reactor is communicated with first residual heat boiler for exchanging heat, the final vacuum end is communicated with second residual heat boiler for exchanging heat;
The described connection with first residual heat boiler for exchanging heat is that first waste heat boiler changing-over receipts glass furnace fume is imported ammonia process SCR Benitration reactor after heat exchange is cooled to 320～420 ℃;
The described connection with second residual heat boiler for exchanging heat is that second waste heat boiler will enter chimney by flue gas after the denitration of ammonia process SCR Benitration reactor after heat exchange is cooled to 150 ℃～170 ℃.
2. the SCR denitrification apparatus of glass furnace fume according to claim 1, it is characterized in that: described ammonia process SCR Benitration reactor comprises ammonia-spraying grid, ammonia-flue gas blender, rectifier and the multi-layer catalyst bed that is installed in successively in the exhaust gases passes, is provided with soot blower at every layer of catalyst bed.
3. the SCR denitrification apparatus of glass furnace fume according to claim 2, it is characterized in that: described soot blower is communicated with the waste heat boiler steam outlet, blowing grey steam pressure is 0.6～0.8MPa, blow ash during catalyst bed stressor layer 〉=400Pa, catalyst bed stressor layer≤200Pa stops to blow ash.
4. according to the SCR denitrification apparatus of claim 1 or 2 or 3 described glass furnace fumes, it is characterized in that: there is the valve of the unlatching the regulated size of flue gas checkout gear and checkout gear control at each flue gas import and export place in the described SCR denitrification apparatus.
5. the SCR denitrification apparatus of glass furnace fume according to claim 4 is characterized in that: described SCR denitrification apparatus comprises the ammonia feeding mechanism that is made of the connecting pipe between storage ammonia jar, liquefied ammonia delivery pump, liquefied ammonia evaporimeter, gas ammonia surge tank, ammonia thinning tank, ammonia recovery unit and each equipment.
6. the SCR denitrification apparatus of glass furnace fume according to claim 5, it is characterized in that: described ammonia-spraying grid is made of the nozzle that is evenly arranged in the flue and be positioned on the same horizontal plane, described nozzle bore is 8 millimeters of φ, and the ammonia jet velocity is 100～200m/s.
7. the SCR denitrification apparatus of glass furnace fume according to claim 5, it is characterized in that: described rectifier is arranged in 1 meter position of ground floor catalyst bed front end, and described rectifier is formed by evenly being arranged on the exhaust gases passes that rhombus in the flue or triangle riser constitute.
8. the SCR denitrification apparatus of glass furnace fume according to claim 5, it is characterized in that: described catalyst bed has three layers, and 1 meter every layer is thick, between each layer 1.5 meters at interval.
9. the SCR denitrification apparatus of glass furnace fume according to claim 5 is characterized in that: the flue gas detection system of with good grounds denitrating flue gas rate and tail gas amount of ammonia slip control ammonia spraying amount in the described SCR denitrification apparatus.
10. the SCR denitrification apparatus of glass furnace fume according to claim 5 is characterized in that: Benitration reactor and waste heat boiler junction are provided with door to be opened/closed.
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| CN 201220686178 CN203123794U (en) | 2012-12-13 | 2012-12-13 | SCR (selective catalytic reduction) denitration device for smoke gas of glass kiln |
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| CN 201220686178 CN203123794U (en) | 2012-12-13 | 2012-12-13 | SCR (selective catalytic reduction) denitration device for smoke gas of glass kiln |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007743A (en) * | 2012-12-13 | 2013-04-03 | 成都东方凯特瑞环保催化剂有限责任公司 | SCR (Selective Catalytic Reduction) denitrification device for flue gas of glass kiln |
| CN103623699A (en) * | 2013-12-13 | 2014-03-12 | 贵州电力试验研究院 | Method for nitrogen displacement in denitration and deamination zones |
| CN103933859A (en) * | 2014-03-31 | 2014-07-23 | 上海德凯工业技术有限公司 | SCR (Selective Catalytic Reduction) denitration system for tail gas treatment of acrylonitrile device |
| CN104190248A (en) * | 2014-08-14 | 2014-12-10 | 诸暨洁球环保科技有限公司 | Denitration device |
| CN105457687A (en) * | 2015-12-04 | 2016-04-06 | 盐城市兰丰环境工程科技有限公司 | On-line blockage cleaning method for SCR (selective catalytic reduction) denitration catalyst |
| CN109173704A (en) * | 2018-08-29 | 2019-01-11 | 宫子凡 | A kind of selective-catalytic-reduction denitrified reactor |
-
2012
- 2012-12-13 CN CN 201220686178 patent/CN203123794U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103007743A (en) * | 2012-12-13 | 2013-04-03 | 成都东方凯特瑞环保催化剂有限责任公司 | SCR (Selective Catalytic Reduction) denitrification device for flue gas of glass kiln |
| CN103623699A (en) * | 2013-12-13 | 2014-03-12 | 贵州电力试验研究院 | Method for nitrogen displacement in denitration and deamination zones |
| CN103623699B (en) * | 2013-12-13 | 2016-03-30 | 贵州电力试验研究院 | A kind of method for the displacement of denitration ammonia district nitrogen |
| CN103933859A (en) * | 2014-03-31 | 2014-07-23 | 上海德凯工业技术有限公司 | SCR (Selective Catalytic Reduction) denitration system for tail gas treatment of acrylonitrile device |
| CN104190248A (en) * | 2014-08-14 | 2014-12-10 | 诸暨洁球环保科技有限公司 | Denitration device |
| CN105457687A (en) * | 2015-12-04 | 2016-04-06 | 盐城市兰丰环境工程科技有限公司 | On-line blockage cleaning method for SCR (selective catalytic reduction) denitration catalyst |
| CN105457687B (en) * | 2015-12-04 | 2018-08-14 | 盐城市兰丰环境工程科技有限公司 | A kind of method of the online block clearing of SCR denitration |
| CN109173704A (en) * | 2018-08-29 | 2019-01-11 | 宫子凡 | A kind of selective-catalytic-reduction denitrified reactor |
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