CN206304550U - A kind of damp dry type flue gas purifying system based on Carbon Materials oxidation and denitration - Google Patents
A kind of damp dry type flue gas purifying system based on Carbon Materials oxidation and denitration Download PDFInfo
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- CN206304550U CN206304550U CN201621169584.6U CN201621169584U CN206304550U CN 206304550 U CN206304550 U CN 206304550U CN 201621169584 U CN201621169584 U CN 201621169584U CN 206304550 U CN206304550 U CN 206304550U
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- flue gas
- dry type
- purifying system
- reactor
- gas purifying
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Abstract
The utility model discloses a kind of damp dry type flue gas purifying system and method based on Carbon Materials oxidation and denitration.The damp dry type flue gas purifying system based on Carbon Materials oxidation and denitration includes that desulfurization reactor, dust removing units, the storage of weary absorbent are sent, activate and humidification unit and Benitration reactor；The outlet of the desulfurization reactor is connected with the dust removing units；The exhanst gas outlet of the dust removing units is connected with the Benitration reactor；The outlet of the Benitration reactor is sequentially connected air-introduced machine and chimney；The outlet of the ash dropping hopper of the dust removing units send with the weary absorbent storage, activate and humidification unit is connected.The utility model realizes the coupling of denitration, desulfurization, dedusting technology, and facility compact, floor space is small；Using semidry method, water consumption is few, and final product is solid-state, without processing waste water, process is simple, in can be widely used for industrial smoke processing procedure.
Description
Technical field
The utility model is related to a kind of smoke eliminator, and in particular to a kind of half dry type based on Carbon Materials oxidation and denitration
Flue gas purification system.
Background technology
Current SCR is the most gas denitrifying technology of commercial Application, and wherein high temperature catalyst reaction temperature requirement is at 350 DEG C
Before left and right is, it is necessary to be arranged in dust-removal and desulfurizing, high-sulfur cloud of dust gas high has very big negative to the activity and service life of catalyst
Effect.Be placed on after desulfurization and dedusting for denitration by low-temperature SCR technique, but reaction temperature is general also more than 150 DEG C, and through desulfurization with
Flue-gas temperature afterwards is general below 70 DEG C, and this requires also to need to reheat flue gas before denitration.Other SCR denitration method
Using NH3Reducing agent is made, ammonia belongs to dangerous material, there is certain potential safety hazard in transport and storing process, in denitrification process
There is NH3The problem of escape.
Utility model content
The purpose of this utility model is to provide a kind of damp dry type flue gas purifying system based on Carbon Materials oxidation and denitration.
Damp dry type flue gas purifying system based on Carbon Materials oxidation and denitration provided by the utility model, it includes that desulfurization is anti-
Device, dust removing units, the storage of weary absorbent is answered to send, activate and humidification unit and Benitration reactor；
The outlet of the desulfurization reactor is connected with the dust removing units；
The exhanst gas outlet of the dust removing units is connected with the Benitration reactor；
The outlet of the Benitration reactor is sequentially connected air-introduced machine and chimney；
The outlet of the ash dropping hopper of the dust removing units send with the weary absorbent storage, activate and humidification unit is connected.
In the utility model, the weary absorbent refer to have absorb potentiality, but activation process of still needing absorbent.
In described damp dry type flue gas purifying system, an air preheater is also connected with before the desulfurization reactor.
In described damp dry type flue gas purifying system, the desulfurization reactor can be riser reactor.
In described damp dry type flue gas purifying system, the dust removing units include primary deduster and the refined dedusting of connection
Device；
The primary deduster is any one in cyclone dust collector, gravity type deduster and louver separator；
The refined dedusting device is any one in sack cleaner, electric cleaner and electric bag combined dust catcher.
In described damp dry type flue gas purifying system, the weary absorbent storage send, activate and humidification unit includes phase successively
The storage bin of connection, conveying device, activator and humidification blender；
Blocking valve is provided between the dust removing units and the storage bin, with the negative shadow for preventing from collaborating to dust removing effects
Ring；
The storage bin is in back taper, and its cone angle is more than 70 °, is conducive to the flowing of solid particulate matter；
The bulkhead of the storage bin is provided with fluidizer and air bubble；
The storage bin wall is provided with weighing device, for the metering of solid particulate matter conveying capacity；
The conveying device is revolution discharge valve or screw feeder；
The activator is provided with finer atomization nozzle or steam nozzle, and can reserve additional solid absorbent charge door；
The activator is continous way or batch (-type) discharge method, and 2+N activator is used if being discharged using batch (-type)
It is arranged in parallel, the activation effect of weary absorbent is further improved by extending soak time；
In described damp dry type flue gas purifying system, the humidification blender passes through distributing device phase with the desulfurization reactor
Connection；
The distributing device is rounded, square or dustpan-shaped.
In described damp dry type flue gas purifying system, the exit of the air-introduced machine connects a flue gas recirculation flue duct bypass,
The flue gas recirculation flue duct bypass is connected with the heat exchanger in the boiler, the outlet of the heat exchanger and the denitration reaction
The regenerated flue gas entrance of device is connected；
The regenerated flue gas outlet of the Benitration reactor is connected with the entrance of the air preheater；
When the carbon base catalyst in the Benitration reactor inactivates (i.e. NO2Gas absorption saturation) after, can be by the cigarette
The regeneration to the carbon base catalyst is realized in the bypass of gas cycle flue：Clean flue gas are heated by the heat exchanger, institute is back to
State in Benitration reactor；The NO for making to be adsorbed on carbon base catalyst using the heat effect of heat smoke2Exported by regenerated flue gas again
The import of air preheater is returned to, is converged with boiler exhaust gas, agent removing is desulfurized in desulfurization reactor.
In described damp dry type flue gas purifying system, the damp dry type flue gas purifying system includes the described de- of multiple parallel connections
Nitre reactor, when a Benitration reactor starts regeneration, can open remaining Benitration reactor, to ensure the continuous fortune of denitration
OK.
When carrying out gas cleaning using this utility model damp dry type flue gas purifying system, can carry out in accordance with the following steps：
Desulphurization denitration is carried out to flue gas to be clean using described damp dry type flue gas purifying system, obtains meeting discharge mark
Accurate flue gas.
Wherein, the purification route of flue gas to be clean is：It is anti-that flue gas to be clean enters the desulfurization by the air preheater
Answer in device, with the desulfurization agent in the desulfurization reactor；Then the flue gas enters from the outlet of the desulfurization reactor
Dedusting is carried out to the dust removing units；The flue gas enters to the Benitration reactor from the exhanst gas outlet of the dust removing units
It is interior, denitration is carried out in the presence of the carbon base catalyst, then reached from the denitration exhanst gas outlet discharge of the Benitration reactor
To the flue gas for meeting discharge standard.
The desulfurizing agent can be high-calcium fly ass, and to obtain the flyash containing calcium activated, boiler oil preferably uses high calcium
Coal (when sulfur content in coal amount is 0.5~1%, CaO content ＞ 10% in ash content~20%)；If fuel is low calcium coal, can be
A certain amount of CaCO is mixed in coal3、Ca(OH)2Or CaO.Also can be by Ca (OH)2Or in CaO addition circulating ash.In order to improve desulfurization
The reactivity of agent, can by water humidification cycle ash (or water humidification cycle ash+in the reactor top spray into two grades humidification water)
Mode adjust temperature and relative humidity required in desulfurization reactor.Reaction temperature is warm away from control with nearly adiabatic saturation temperature
At 5~25 DEG C.
The carbon base catalyst can be activated carbon, activated coke, active carbocoal and/or NACF
The utility model system realizes that the principle of gas cleaning is：
In the Benitration reactor under the catalytic action of carbon based material, the NO oxidation generations of adsorptivity difference are more easy to by charcoal in flue gas
The NO of sill absorption2, the middle NO of flue gasxRemoved by catalytic adsorption；After Carbon Materials inactivation is adsorption saturation, clean hot cigarette is passed through
Gas thermal regeneration, the NO high after regeneration2Flue gas returns to the interior calcium-based desulfurizing agent of desulfurization reactor and is removed.
The utility model obtains following technique effect：
The utility model uses carbon based material as catalyst, under conditions of low temperature and oxygen are present, by the NO in flue gas
It is oxidized to the NO for easily being adsorbed by Carbon Materials2, so that the NO in removing flue gasx, removal efficiency is more than 90%.Carbon Materials absorption is full
With it is rear, using heat smoke heating by the way of regenerated, can repeatedly use.
Contain NO after regeneration2Flue gas enter desulfuration reaction device in calcium-based desulfurizing agent reaction removed, greatly letter
The handling process of accessory substance after denitration is changed.Benitration reactor is arranged in after desulfurization and dedusting, greatly reduces sulfureous in flue gas
Compound and dust to the poisoning of catalyst, block, the negative effect such as wear and tear, and denitration reaction uses fixed-bed structure form, keeps away
The mechanical wear of catalyst in moving bed denitrating technique is exempted from.
At 50~90 DEG C, just in the temperature window of NO catalysis oxidations, flue gas can be passed directly into flue-gas temperature after desulfurization
Denitration reaction is carried out in Benitration reactor, without being heated to flue gas again.
The utility model realizes the coupling of denitration, desulfurization, dedusting technology, and facility compact, floor space is small；Using half-dried
Method, water consumption is few, and final product is solid-state, and without processing waste water, process is simple can be widely used for industrial smoke processing procedure
In.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model damp dry type flue gas purifying system.
Fig. 2 is the structural representation of Benitration reactor in utility model damp dry type flue gas purifying system.
Each mark is as follows in figure：
1,2 Benitration reactor, 3 desulfurization reactors, 41 primary dedusters, 42 refined dedusting devices, 5 blocking valves, 6 storage bins, 7 is defeated
Send device, 8 activators, 9 humidification blenders, 10 distributing devices, 11 air preheaters, 12 boilers, 13 heat exchangers, the circulation of 14 regenerated flue gas
Pump, 15 air-introduced machines, 16 chimneys, 17 grey storehouses, 101,102,103,104,201,202,203,204 valves, 105 catalyst charges
Mouthful, 106 catalyst discharging openings, 107 denitration gas approach, 108 denitration exhanst gas outlets, 109 regenerated flue gas imports, 110 regeneration cigarettes
Gas is exported.
Specific embodiment
The utility model is described further below in conjunction with the accompanying drawings, but the utility model is not limited to following implementation
Example.
Experimental technique used in following embodiments is conventional method unless otherwise specified.
Material used, reagent etc. in following embodiments, unless otherwise specified, commercially obtain.
As shown in figure 1, be the structural representation of the utility model damp dry type flue gas purifying system, the removing system and boiler
12 are connected, and the back-end ductwork of boiler 12 is connected with air preheater 11, the outlet of air preheater 11 and the desulfurization reactor 3 of vertical pipe type
It is connected, SO in the calcium activated removing flue gas in utilizing flyash in desulfurization reactor 32、SO3Deng sour gas.Desulphurization reaction
The outlet of device 3 is connected with dust removing units, for the flue gas removed after pollutant to be carried out into dedusting.Wherein, dust removing units bag
The primary deduster 41 and refined dedusting device 42 of connection are included, primary deduster 41 may be selected cyclone dust collector, gravity type deduster
With in louver separator any one, refined dedusting device 42 may be selected sack cleaner, electric cleaner and electric bag combined dust catcher
In any one.The ash port of the dust removing units is stored up by blocking valve 5 and weary absorbent and send, activates and humidification unit is connected, lock
The effect of air valve 5 is the negative effect for preventing from collaborating to dust removing effects.Weary absorbent storage gives, activate and humidification unit include according to
The storage bin 6 of secondary connection, conveying device 7, activator 8 and humidification blender 9, storage bin 6 is in back taper, and its cone angle is more than 70 °,
Be conducive to the flowing of circulating ash.Cinder-discharging port is set in the cone section of storage bin 6, unnecessary material delivers to grey storehouse 17 through cinder-discharging port discharge, with
The material balance of maintenance system.The blender 9 that is humidified in the utility model system is connected with desulfurization reactor 3 by distributing device 10
Logical, distributing device can be rounded, square or dustpan-shaped.The exhanst gas outlet of dust removing units Benitration reactor 1 and 2 phase in parallel with 2
Connection, under the catalytic action of carbon based material, the NO oxidation generations of adsorptivity difference are more easy to what is adsorbed by carbon based material in flue gas
NO2, the middle NO of flue gasxRemoved by catalytic adsorption.The outlet of Benitration reactor 1 and 2 is sequentially connected air-introduced machine 15 and chimney 16, i.e.,
Clean flue gas are discharged through air-introduced machine 15 from chimney 16.The pipe being connected with the smoke inlet and exhanst gas outlet of Benitration reactor 1 and 2
Road is provided with valve 101,102,103,104,201,202,203 and 204.
When the carbon base catalyst in Benitration reactor 1 and 2 inactivates (i.e. NO2Gas absorption saturation) after, can be by setting cigarette
The regeneration to carbon base catalyst is realized in the bypass of gas cycle flue：Connected by the flue gas recirculation flue in the exit of air-introduced machine 15
Road, the flue gas recirculation flue duct bypass is connected with the heat exchanger 13 in the boiler 12, the outlet of heat exchanger 13 and denitration reaction
Regenerated flue gas entrance 109 of the device 1 with 2 is connected；The regenerated flue gas outlet 110 of Benitration reactor 1 and 2 and the entrance of air preheater 11
It is connected；Clean flue gas are heated by heat exchanger 13, is back in Benitration reactor 1 and 2, the heat effect using heat smoke makes
The NO adsorbed on carbon base catalyst2110 imports for returning to air preheater 11 are exported by regenerated flue gas again, are converged with boiler exhaust gas,
Agent removing is desulfurized in desulfurization reactor 3.
The utility model damp dry type flue gas purifying system use Benitration reactor structure as shown in Fig. 2 its top and
Bottom is respectively equipped with catalyst feeds 105 and catalyst discharging opening 106, and denitration gas approach is respectively equipped with its opposing sidewalls
107 and denitration exhanst gas outlet 108, regenerated flue gas import 109 and regenerated flue gas outlet 110 are additionally provided with its side wall.
The flow for carrying out gas cleaning using the utility model damp dry type flue gas purifying system is as follows：
Boiler 12 burning produce 100~200 DEG C of flue gases through air preheater 11 exchange heat after further lower the temperature, temperature 120 DEG C with
Under flue gas enter in the desulfurization reactor 3 of vertical pipe type, remove flue gas using the calcium activated in flyash in the desulfurization reactor 3
Middle SO2、SO3Deng sour gas；The dust in primary deduster 41 and the removing flue gas of refined dedusting device 42 is sequentially entered afterwards；Through de-
(50~90 DEG C) of low-temperature flue gas after sulphur dedusting enter Benitration reactor 1, under the catalytic action of carbon based material, are adsorbed in flue gas
Property difference NO oxidation generation be more easy to by carbon based material adsorb NO2, the middle NOx of flue gas removed by catalytic adsorption, clean flue gas warp
Air-introduced machine is discharged from chimney.The flyash that pre-duster 41 and refined dedusting device 42 are collected enters storage in storage bin 6 through blocking valve 5
Deposit, conveying device 7 quantitatively feeds activator 8, after the material after activation enters the uniform humidification of humidification mixing arrangement 9, then through cloth
In the negative pressure of device 10 suction desulfurization reactor 3, the complete desulfurizing agent of unreacted participates in reaction again, to improve the utilization of desulfurizing agent
Rate.Unnecessary flyash is entered in grey storehouse 17 in storage bin 6.
I.e. NO after Carbon Materials inactivation in Benitration reactor 12Gas absorption saturation, closes and imports and exports the He of gas fume valve 101
102, open regenerated flue gas and import and export Flue valve 103 and 104, extension flue gas is exported through circulating fan 14 from air-introduced machine 15
Into the heat exchanger 13 in boiler 12,250~450 DEG C of clean heat smoke is heated to through regenerated flue gas imported valve 103
Into the inside of Benitration reactor 1 or chuck, (i.e. heating parsing of the heat smoke to Carbon Materials can use direct contact type, also may be used
With using contactless), the NO adsorbed on Carbon Materials in Benitration reactor 1 after being heated through heat smoke2By outlet valve 104 times
To the import of air preheater 11, converge with boiler exhaust gas, agent removing is desulfurized in desulfurization reactor 3.To ensure the company of denitrification apparatus
Reforwarding row, when Benitration reactor 1 starts regeneration, while opening the import and export Flue valve 201 and 201 of Benitration reactor 2.Two
And above Benitration reactor is alternately enabled.
The clean-up effect of the utility model system：
Boiler exhaust gas are constituted：SO2Concentration is 600mg/Nm3, NOxConcentration is 400mg/Nm3, the temperature of flue gas is 120
℃.Purified through the utility model damp dry type flue gas purifying system, wherein, desulfurizing agent is high-calcium fly ass, carbon base catalyst
It is activated carbon.Purified treatment, SO2Removal efficiency is 92%, NOxRemoval efficiency is 90%.
Claims (7)
1. a kind of damp dry type flue gas purifying system based on Carbon Materials oxidation and denitration, it includes desulfurization reactor, dust removing units, weary
Absorbent storage is sent, activates and humidification unit and Benitration reactor；
The outlet of the desulfurization reactor is connected with the dust removing units；
The exhanst gas outlet of the dust removing units is connected with the Benitration reactor；
The outlet of the Benitration reactor is sequentially connected air-introduced machine and chimney；
The outlet of the ash dropping hopper of the dust removing units send with the weary absorbent storage, activate and humidification unit is connected.
2. damp dry type flue gas purifying system according to claim 1, it is characterised in that：The desulfurization reactor is vertical pipe type
Reactor.
3. damp dry type flue gas purifying system according to claim 1 and 2, it is characterised in that：The dust removing units include connecting
The primary deduster and refined dedusting device for connecing；
The primary deduster is any one in cyclone dust collector, gravity type deduster and louver separator；
The refined dedusting device is any one in sack cleaner, electric cleaner and electric bag combined dust catcher.
4. damp dry type flue gas purifying system according to claim 3, it is characterised in that：The weary absorbent storage is sent, activates
And humidification unit includes being sequentially connected storage bin, conveying device, activator and the humidification blender for connecing；
Blocking valve is provided between the dust removing units and the storage bin；
The storage bin is in back taper, and its cone angle is more than 70 °；
The bulkhead of the storage bin is provided with fluidizer and air bubble；
The storage bin wall is provided with weighing device；
The conveying device is revolution discharge valve or screw feeder；
The activator is provided with finer atomization nozzle or steam nozzle；
The activator is continous way or batch (-type) discharge method.
5. damp dry type flue gas purifying system according to claim 4, it is characterised in that：The humidification blender is de- with described
Reaction of Salmon-Saxl device is connected by distributing device；
The distributing device is rounded, square or dustpan-shaped.
6. damp dry type flue gas purifying system according to claim 5, it is characterised in that：The exit connection of the air-introduced machine
One flue gas recirculation flue duct bypass, the flue gas recirculation flue duct bypass is connected with the heat exchanger in boiler, the heat exchanger
Outlet be connected with the regenerated flue gas entrance of the Benitration reactor；
The regenerated flue gas outlet of the Benitration reactor is connected with the entrance of air preheater.
7. damp dry type flue gas purifying system according to claim 6, it is characterised in that：The damp dry type flue gas purifying system
Including multiple Benitration reactors in parallel；
The carbon base catalyst that the Benitration reactor is used is activated carbon, activated coke, active carbocoal and/or NACF.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621169584.6U CN206304550U (en) | 2016-11-02 | 2016-11-02 | A kind of damp dry type flue gas purifying system based on Carbon Materials oxidation and denitration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621169584.6U CN206304550U (en) | 2016-11-02 | 2016-11-02 | A kind of damp dry type flue gas purifying system based on Carbon Materials oxidation and denitration |
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| CN206304550U true CN206304550U (en) | 2017-07-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019228546A1 (en) * | 2018-05-31 | 2019-12-05 | 郑州市天之蓝环保科技有限公司 | Industrial flue gas treatment system |
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2016
- 2016-11-02 CN CN201621169584.6U patent/CN206304550U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019228546A1 (en) * | 2018-05-31 | 2019-12-05 | 郑州市天之蓝环保科技有限公司 | Industrial flue gas treatment system |
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Address after: 100013 No. 5 Youth Road, Chaoyang District, Beijing, Hepingli Patentee after: Beijing Tiandi Sunac Technology Co.,Ltd. Address before: 100013 No. 5 Youth Road, Chaoyang District, Beijing, Hepingli Patentee before: CHINA COAL RESEARCH INSTITUTE (CCRI) ENERGY SAVING TECHNOLOGY CO.,LTD. |
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| CP01 | Change in the name or title of a patent holder |