CN206660956U - A kind of device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant - Google Patents
A kind of device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant Download PDFInfo
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- CN206660956U CN206660956U CN201720228897.2U CN201720228897U CN206660956U CN 206660956 U CN206660956 U CN 206660956U CN 201720228897 U CN201720228897 U CN 201720228897U CN 206660956 U CN206660956 U CN 206660956U
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- flue gas
- spray
- low temperature
- multiple pollutant
- phase oxidation
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Abstract
The utility model discloses a kind of device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant, belong to flue gases purification field.This device includes liquid oxidizer heating activation, catalysis oxidation and spray-absorption three parts, and liquid oxidizer heating activated partial main body is winding pipe, and the abundant vaporization of liquid oxidizer is realized by extending the residence time；Catalysis oxidation part is low-temperature catalyzed for dust arrester rear end, and gas-like phase oxidant is in this and catalyst, flue gas pollutant haptoreaction；Spray-absorption part is spray column, and bottom and top are connected with filtering separation device and chimney respectively, realize the recycling of oxidation product and the discharge of clean flue gas.The utility model carries out integrated removing to flue gas multiple pollutant, investment and operating cost are saved, and absorption product nitrogen, sulfur content are higher, are easy to recycling, suitable for polytype boiler and other filed of flue gas purification, there is higher economy and promotional value.
Description
Technical field
The utility model belongs to flue gases purification field, and in particular to a kind of low temperature class catalytic gas phase oxidation removes flue gas
The device of multi-pollutant.
Background technology
In recent years, with SO2、NOxAnd Hg0Govern that national economy is quick, sustainable development for the coal-fired flue-gas pollutant of representative
Exhibition, while be also one of inducement for taking place frequently of China's haze, the improvement to coal-fired flue-gas multi-pollutant for safeguard ecological environment and
Human health is significant.The desulfurizing and denitrifying process of the existing coal-burning power plant's main flow in China be respectively wet desulphurization (WFGD) and
Selective catalytic reduction denitration (SCR), U.S. part power plant before dust arrester by installing activated carbon injected system (ACI) additional
Realize the adsorbing and removing of gas mercury.Big floor space, system complex and operating cost height etc. be present and lack in above-mentioned classification processing mode
Fall into, and product (mercurous activated carbon, N2And H2O that secondary pollution and value are low etc.) be present.Therefore, Low-cost, can
The multi-pollutant integration removing sulfuldioxide of recycling and non-secondary pollution is the weight in domestic and international coal-fired flue-gas pollutant catabolic gene field
Want research direction.
In many integrated techniques, the mode that oxidation bonding absorbs is a kind of great representational administering method, wherein
The selection of oxidant is again the most important thing for realizing this method.Using persulfate, hypochlorite, hydrogen peroxide and permanganate as
The oxidant of representative has all been applied successfully in the field, but the oxidability of single liquid phase oxidant still has much room for improvement.Research
Show, liquid oxidizer activation and the use of high activated catalyst can all be effectively improved to the oxidation of unit oxidant by heating up
Ability.Therefore, the catalysis oxidation developed under the conditions of gas-like phase, for improve pollutant removing efficiency, reduce oxidant consumption amount,
Operating cost is reduced to have great importance.
Utility model content
The utility model is directed to the deficiency of existing multi-pollutant removing technology, there is provided a kind of gas-like phase catalytic oxidative desulfurization
The device of flue gas multiple pollutant, the device are made up of liquid oxidizer heating activation, catalysis oxidation and spray-absorption three parts, institute
Liquid oxidizer heating activated partial is stated, by oxidant fluid reservoir 1, the first proportioning pump 2, booster fan 3, winding pipe 4 and insulation
Pipe 5 forms, and the winding pipe 4 is located in the flue of the front end of dust arrester 6, by the first proportioning pump 2 and increases blower fan 3 by liquid
Oxidant is blasted in winding pipe 4, and realizes that the heating of oxidant activates using the temperature in the front end smoke canal of dust arrester 6；It is described
Insulating tube 5 is located at the top of dust arrester 6, and winding pipe 4 is connected with steam-like oxidant nozzle 7；
The catalysis oxidation part is located in the rear end flue of dust arrester 6, by steam-like oxidant nozzle 7 and catalyst
Bed 8 is formed, and the steam-like oxidant nozzle 7 is located at the front end of beds 8, and the gas-like phase oxidant of ejection is being catalyzed
Agent effect is lower to produce oxidizing species, by the efficient Quick Oxidation of slightly solubility pollutant in flue gas；
The spray-absorption part is located at the downstream of catalysis oxidation part, by the second proportioning pump 13, the and of absorbing liquid conservation tank 9
Spray absorber 10 is formed, and the absorbing and removing of soluble pollutants in coal-fired flue-gas is realized by spray-absorption slurries.
The winding pipe 4 is titanium steel structure, is combined by multiple ring-shaped round pipe, liquid oxidizer wherein with coal-fired cigarette
Gas carries out heat exchange, and the warm pipe 5 of gained gas-like phase oxidant enters steam-like oxidant nozzle 7.
The insulating tube 5 is three layers of cylindrical structure, is anti-corrosion pipe, electric heating layer and heat insulation foam successively from inside to outside.
The beds 8 are placed in the flue in dust arrester exit, using two layers of cellular arrangement, air speed
Less than or equal to 229299h-1, flue gas after dust removal process and gas-like phase oxidant are simultaneously into inside bed, in the work of catalyst
Efficient Quick Oxidation occurs with lower.
The bottom of spray absorber 10 sets filtering separation device 12, and the top of spray absorber 10 is connected with chimney 11.
The beneficial effects of the utility model：
1st, the device of flue gas multiple pollutant is removed using the low temperature class catalytic gas phase oxidation, the optimal desulphurization denitration of acquirement takes off
Mercury efficiency is respectively 99-100%, 90-95% and 90-95%, under the conditions of power plants typical case's operating condition, can meet combustion
Coal-fired plant's atmosphere pollution minimum discharge standard.The classification processing mode existing compared to coal-burning power plant, the technology can be to a variety of
Flue gas pollutant is realized and removed simultaneously, and the removal efficiency obtained is higher, capital construction and operating cost are lower, and operation is more easy,
Product is more conducive to recycling, suitable for polytype boiler, has broad application prospects.
2nd, the device of a kind of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant of the present utility model, is effectively utilized
The flue gas heat of deduster rear and front end, low temperature catalyst is also set to be in activity most while realizing liquid oxidizer heating activation
Good temperature window, effectively increases heat utilization efficiency, the application of low temperature catalyst it also avoid impact of the flue dust to catalyst and
Block, extend catalyst service life, save investment operating cost.
Brief description of the drawings
Fig. 1 is the structure that a kind of low temperature class catalytic gas phase oxidation provided by the utility model removes flue gas multiple pollutant device
Schematic diagram；
Label implication is as follows in figure：1- oxidant fluid reservoirs；The proportioning pumps of 2- first；3- booster fans；4- returns ring pipe；5-
Insulating tube；6- dust arresters；7- steam-like oxidant nozzles；8- beds；9- absorbing liquid fluid reservoirs；10- spray-absorptions
Tower；11- chimneys；12- filtering separation devices；The proportioning pumps of 13- second.
Fig. 2 is the structural representation of winding pipe.
Embodiment
The utility model provides a kind of device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant, with reference to
The utility model feature is described drawings and examples, and example is served only for explaining the utility model, is not limited to this
The scope of utility model.
Low temperature class catalytic gas phase oxidation removing means provided by the utility model is as shown in figure 1, described device includes liquid
Oxidant heating activation, catalysis oxidation and spray-absorption three parts, the liquid oxidizer heating activated partial, are stored up by oxidant
Flow container 1, the first proportioning pump 2, booster fan 3, winding pipe 4 and insulating tube 5 form, and the winding pipe 4 is located at the front end of dust arrester 6
Flue in, the insulating tube 5 is located at the top of dust arrester 6, and winding pipe 4 is connected with steam-like oxidant nozzle 7；It is described to urge
Change oxidized portion to be located in the rear end flue of dust arrester 6, be made up of steam-like oxidant nozzle 7 and beds 8, it is described
Steam-like oxidant nozzle 7 is located at the front end of beds 8；The spray-absorption part is located under catalysis oxidation part
Trip, is made up of the second proportioning pump 13, absorbing liquid conservation tank 9 and spray absorber 10.
The winding pipe 4 is titanium steel structure, is combined by multiple ring-shaped round pipe, as shown in Figure 2.
The insulating tube 5 is three layers of cylindrical structure, is anti-corrosion pipe, electric heating layer and heat insulation foam successively from inside to outside.
The beds 8 are placed in the flue in dust arrester exit, using two layers of cellular arrangement.
The bottom of spray absorber 10 sets filtering separation device 12, and the top of spray absorber 10 is connected with chimney 11.
In flue gas multiple pollutant removal process：Liquid oxidizer is injected deduster front end by proportioning pump 2 and booster fan 3
In back-shaped pipe 4 in flue, using cigarette temperature by oxidant activation be gas-like phase, through steam-like oxidant nozzle 7 spray after, except
Oxidizing species are produced with the effect of catalyst 8 in the flue of dirt rear end, slightly solubility component in flue gas is rapidly and efficiently aoxidized, and
The integration removing of coal-fired flue-gas multi-pollutant, product stream in the form of sulfate, nitrate are realized in dissolving in spray column 10
To absorb the bottom of the tower, it is separated by filtration device 12 and realizes filtering, separation, the higher product of nitrogen, sulfur content is obtained after drying.
Embodiment 1
Using 15wt% hydrogenperoxide steam generators as oxidant, molecular sieve carried nano zero valence iron is catalyst, is in air speed
152866h-1Under the conditions of, hydrogenperoxide steam generator is injected into heated up in back-shaped pipe activation, the warm pipe of gas-like phase oxidant and nozzle
Contacted after ejection with beds, produce the highly reactive form of oxygen agent using hydroxyl radical free radical as representative, by slightly solubility pollutant oxygen
Change, and ammonia absorption lower by spray in absorption tower, during maintain that back-shaped pipe is interior, reaction bed temperature is followed successively by
130 DEG C, 110 DEG C, gained removal efficiency is as follows：SO2Removal efficiency be 99.1%, denitration efficiency 90.2%, demercuration efficiency
For more than 90.7%.
Embodiment 2
Using 15wt% potassium persulfate solutions as oxidant, molecular sieve carried nano ferriferrous oxide is catalyst, in air speed
For 229299h-1Under the conditions of, potassium persulfate solution is injected into heated up in back-shaped pipe activation, the warm pipe of gas-like phase oxidant and spray
Mouth contacts after spraying with beds, the highly reactive form of oxygen agent using potentiometric titrations as representative is produced, by indissoluble contact scar
Thing aoxidizes, and sodium humate lower by spray in absorption tower absorbs, during maintain that back-shaped pipe is interior, reaction bed temperature
170 DEG C, 150 DEG C are followed successively by, gained removal efficiency is as follows：SO2Removal efficiency be 99.5%, denitration efficiency 91.2%, take off
Mercury efficiency is more than 92.7%.
Embodiment 3
Using 2%wt potassium peroxydisulfates and 15%wt hydrogenperoxide steam generators as oxidant, molecular sieve carried nano zero valence iron and four
Fe 3 O is catalyst, is 229299h in air speed-1Under the conditions of, composite oxidant is injected into the activation that heated up in back-shaped pipe, class gas
The warm pipe of phase oxidation agent and nozzle contact after spraying with beds, produce using hydroxyl radical free radical, potentiometric titrations as
The highly reactive form of oxygen agent of representative, slightly solubility pollutant is aoxidized, and in absorption tower by spray and under ammoniacal liquor/sodium humate inhale
Receive.During maintain back-shaped pipe in, reaction bed temperature be followed successively by 170 DEG C, 150 DEG C, gained removal efficiency is as follows：SO2's
Removal efficiency is 99.9%, denitration efficiency 95.1%, and demercuration efficiency is more than 94.7%.
Claims (5)
- A kind of 1. device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant, it is characterised in that：Described device is by liquid Oxidant heating activation, catalysis oxidation and spray-absorption three parts composition, the liquid oxidizer heating activated partial, by aoxidizing Agent fluid reservoir (1), the first proportioning pump (2), booster fan (3), winding pipe (4) and insulating tube (5) composition, the winding pipe (4) In the flue of dust arrester (6) front end, the insulating tube (5) is located above dust arrester (6), by winding pipe (4) with steaming Steam state oxidant nozzle (7) is connected；The catalysis oxidation part is located in the flue of dust arrester (6) rear end, is aoxidized by steam-like Agent nozzle (7) and beds (8) composition, the steam-like oxidant nozzle (7) are located at the front end of beds (8)； The spray-absorption part is located at the downstream of catalysis oxidation part, by the second proportioning pump (13), absorbing liquid conservation tank (9) and spray Absorption tower (10) forms.
- 2. a kind of device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant, its feature exist according to claim 1 In the winding pipe (4) is titanium steel structure, is combined by multiple ring-shaped round pipe.
- 3. a kind of device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant, its feature exist according to claim 1 In the insulating tube (5) is three layers of cylindrical structure, is anti-corrosion pipe, electric heating layer and heat insulation foam successively from inside to outside.
- 4. a kind of device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant, its feature exist according to claim 1 In the beds (8) are located in the flue in dust arrester (6) exit, and arrangement is cellular two layers, and air speed is small In equal to 229299h-1。
- 5. a kind of device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant, its feature exist according to claim 1 In spray absorber (10) bottom sets filtering separation device (12), spray absorber (10) top and chimney (11) phase Even.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720228897.2U CN206660956U (en) | 2017-03-09 | 2017-03-09 | A kind of device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant |
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| CN201720228897.2U CN206660956U (en) | 2017-03-09 | 2017-03-09 | A kind of device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant |
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| CN206660956U true CN206660956U (en) | 2017-11-24 |
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| CN201720228897.2U Expired - Fee Related CN206660956U (en) | 2017-03-09 | 2017-03-09 | A kind of device of low temperature class catalytic gas phase oxidation removing flue gas multiple pollutant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109865415A (en) * | 2019-04-08 | 2019-06-11 | 福建省特种设备检验研究院 | CFB boiler, which is mixed, burns anthracite and sawdust sludge gas mercury oxidation control technique |
-
2017
- 2017-03-09 CN CN201720228897.2U patent/CN206660956U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109865415A (en) * | 2019-04-08 | 2019-06-11 | 福建省特种设备检验研究院 | CFB boiler, which is mixed, burns anthracite and sawdust sludge gas mercury oxidation control technique |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171124 Termination date: 20190309 |