CN204952621U - Single tower oxidative desulfurization denitrification facility - Google Patents
Single tower oxidative desulfurization denitrification facility Download PDFInfo
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- CN204952621U CN204952621U CN201520673521.3U CN201520673521U CN204952621U CN 204952621 U CN204952621 U CN 204952621U CN 201520673521 U CN201520673521 U CN 201520673521U CN 204952621 U CN204952621 U CN 204952621U
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Abstract
The utility model provides a single tower oxidative desulfurization denitrification facility, includes the absorption tower tower body of tube -shape, be located absorption tower tower body lower part the section of thick bamboo that admits air, be located absorption tower tower body upper portion the aiutage, set up baffle -box outside the absorbent pond of absorption tower tower body and absorption system and the tower be connected with the absorption tower tower body, single tower oxidative desulfurization denitrification facility is absorbent pond, lower part absorption system, oxidative system, partition system and upper portion absorption system along flue gas flow from bottom to top in proper order. The flue gas gets into the absorption tower tower body by the section of thick bamboo that admits air, sprays layer and lower part defroster through agitator, lower part in proper order, and wherein the lower part sprays the desulfurizer in spraying the layer, absorbs SO2 wherein, and the flue gas behind the desorption SO2 gets into the oxidative system. The utility model discloses technology and system be simple, can realize high -efficiently that SOx/NOx control function, multiple mode of operation can be fit for multiple flue gas, sulphur nitrogen resource can independent recycle, but the wide application is handled in flue gas or waste gas SOx/NOx control.
Description
Technical field
The utility model relates to a kind of flue gas purifying equipment.
Background technology
Sulfur dioxide (SO
2) and nitrogen oxide (NO
x) discharge drastically influence natural environment.The industrial waste gases such as power plant, cement, metallurgy, iron and steel all need through cleaning procedure process, reduce the concentration of emission of pollutant.Along with process of industrialization is progressively deepened, discharge amount of exhaust gas and the total amount of pollutant progressively rise, and because total amount goes up, the concentration of emission of pollutant controls strict gradually.
In early days, wet desulfurizing process occupies the staple market of means of flue gas desulfurization of power plant, and the double-cycle process (for CN102921287A) further developed can SO
2concentration of emission low in the enterprising step-down in former wet desulphurization basis; Simultaneously power-plant flue gas denitration general incorporating selectively catalytic reduction (SCR) denitration technology, desulfurization and denitration operation need two cover systems, two groups of personnel, floor space and operating cost high.In this case, single tower simultaneous SO_2 and NO removal technology comes into one's own gradually.Not only power-plant flue gas, also there is desulfurization and denitrification integral technology in the improvement of petrochemical industry flue gas, tail gas, has suitable representativeness with the Wet technique of-Belco company of Du Pont.But this technology needs, before ozone sprays, to set up the quenching apparatus of waste gas, reduces the life-span to ensure the ozone sprayed not draw hot environment; Meanwhile, sulphur, nitrogen resource can only process as mixed waste liquor, are difficult to again utilize.
Chinese patent CN102847430A discloses a kind of flue gas purification system, and this technology passes into gaseous oxidizing agent at former smoke conveying duct.Generally, the temperature of former flue gas is higher than 100 DEG C, and at this temperature, the half-life of ozone decomposed is very short, and the oxidation productive rate of NOx is very low.The oxidation productive rate of lower NOx directly causes lower device denitration efficiency, and sulphur, nitrogen resource be difficult to again utilize.
Chinese patent CN201410496174.1 discloses a kind of technology utilizing hydrogenperoxide steam generator to carry out oxidation and denitration, simultaneously desulfurization, but sulphur, nitrogen resource cannot reclaim respectively and again utilize.Meanwhile, water-soluble far below SO due to NO
2deng other sour gas, the NOX in flue gas is main based on NO again, there is remarkable defect in the technology of liquid phase oxidation NOX, is difficult to realize efficient oxidation, and this is the character decision of handling object NO molecule itself.Very well water-soluble due to SO2, liquid phase oxidation can reach good effect.
In technology disclosed in Chinese patent CN201410078967.1, flue gas repeatedly changes flow direction, multistage baffle plate can cause flue gas resistance excessive under existing, and causes system burden overweight.In this technology, reckon without the mixed problem of oxidant and flue gas.
In single tower simultaneous SO_2 and NO removal technology, the selection of oxidant, feed postition and position, be very important with the factor such as hybrid mode, mixing condition of oxide.
Utility model content
The purpose of this utility model is to provide a kind of single tower oxidation sweetening denitrification apparatus, can realize SO in efficient removal waste gas
2and NO
xobject, the element sulphur removed, nitrogen element can reclaim respectively, again utilize, and housing structure is simple, and do not need the annex such as deflection plate, quenching apparatus, flue gas resistance is little.
For achieving the above object, the utility model adopts following technical scheme:
A kind of single tower oxidation sweetening denitrification apparatus, comprise the absorption tower tower body of tubular, be positioned at the air induction mast of tower body bottom, absorption tower, be positioned at the aiutage on tower body top, absorption tower, the outer baffle-box of tower being arranged on absorbent pond in the tower body of absorption tower and absorption system and being connected with absorption tower tower body, also comprise oxidative system and separating system, described single tower oxidation sweetening denitrification apparatus is followed successively by absorbent pond from bottom to top along flue gas flow direction, lower absorbent system, oxidative system, separating system and top absorption system, described separating system is communicated with by the outer baffle-box of pipeline and tower.
Described oxidative system comprises ozone transfer pipeline, be connected to the first injector of every root ozone transfer pipeline end and second injector and the ozone baffle plate below first injector, described first injector and second injector are oppositely arranged, wherein first injector is positioned at below, its port spraying ozone gas is downward, and wherein second injector is positioned at top, it sprays the port of ozone gas upwards.
Described separating system comprises the gravity line be positioned at through oxidative system on tower body axis, absorption tower, is connected to the catch tray of the back taper tubular of gravity line upper end and is positioned at the deflection cone of the annular above catch tray, and the lower surface of described catch tray is positioned at the top that second injector sprays the port of ozone gas.
The pipeline that described gravity line is communicated with the outer baffle-box of tower is connected with the 3rd valve, and the both sides up and down gravity line being positioned at this pipeline are connected to the second valve and the second valve.
Described ozone transfer pipeline and be connected to the first injector of every root ozone transfer pipeline end and second injector has 1 ~ 8 group, described ozone transfer pipeline is connected to the inner side of absorption tower tower body around gravity line hoop uniform intervals, the corresponding one piece of ozone baffle plate in the below of each first injector, wherein first injector and second injector spray the port of ozone gas and the angle of vertical direction is all no more than 45 °.
Described deflection cone hoop is fixed on the inwall of absorption tower tower body, its upper surface by the one end be connected with absorption tower tower body inwall to catch tray tilt and exceed the edge of catch tray, lower surface is tilted by the inwall of the one end being positioned at catch tray to absorption tower tower body, the longitudinal section of deflection cone is the triangle be made up of top surface edge, lower surface edge and absorbing tower body sidewall edge three.
The shape of described ozone baffle plate is one or more in fan-shaped, circular, oval, triangle, quadrangle, convex or concave shape.
Described absorbent pond is communicated with smoke inlet pipe road and Sulphur ressource reclaim line, and absorbent pond is communicated with air or oxygen air inlet pipeline and has agitator in absorbent pond.
The outer baffle-box of described tower and nitrogen resource reclaim pipeline connection, agitator is arranged at the bottom of the outer baffle-box of tower.
Described lower absorbent system comprises bottom spraying layer and is positioned at the bottom demister above the spraying layer of bottom, and described bottom spraying layer is communicated with absorbent pond by circulating feeding liquid bypass.
Described top absorption system comprises top spraying layer and is positioned at the top demister above the spraying layer of top, and described top spraying layer is passed through circulating feeding liquid bypass and is communicated with absorbent pond, is communicated with by pipeline and the outer baffle-box of tower.
Compared with prior art the utility model has following characteristics and beneficial effect:
The utility model overcomes traditional desulfuring and denitrifying apparatus complex structure, removal effect difference and sulphur, nitrogen resource effectively can not be separated the shortcoming of recycling, solves and realizes SO
2and NO
xthe technical problem removing, have recovery efficiency of sulfur, nitrogen resource.
The utility model provides a kind of single tower oxidation sweetening denitrification apparatus, and its structure comprises absorbent pond, lower absorbent system, oxidative system, separating system, top absorption system and exhaust system from bottom to top successively:
(1) absorbent pond: comprise agitator and smoke inlet pipe road, agitator can install multiple stage at different angles, differing heights, air inlet pipeline can be multiple along tower cross section annular different angles distributing installation, and the absorbent in absorption cell pumps into top spraying layer and bottom spraying layer by solution feed pump through circulating feeding liquid bypass.
(2) lower absorbent system: comprise bottom spraying layer, bottom demister, bottom spraying layer sprays absorbent, and bottom demister is for reducing the droplet in flue gas, droplet content, and object reduces ozone decomposed speed to affect by the speedup of droplet, drop; Meanwhile, when uptake zone, top absorbent used is different from lower absorbent district absorbent used, mixing between the two can effectively be reduced.
(3) oxidative system: comprise first injector, second injector, ozone baffle plate and ozone transfer pipeline, first injector by ozone transfer pipeline Jet with downward flow direction to ozone baffle plate, second injector is upwards injected into separating system catch tray lower surface by ozone transfer pipeline, ozone spreads from ozone baffle plate and catch tray lower surface respectively, mix with flue gas and contact, carry out oxidation reaction in gas phase.
(4) separating system: comprise catch tray, gravity line and deflection cone, the absorbent that catch tray sprays for collecting top spraying layer, collector tray bottom connects gravity line, and catch tray lower surface is as second injector gas gas contact surface; When uptake zone, top and lower absorbent district use absorbent of the same race, gravity line can by the liquid of collection discharged to absorbent pond or the outer baffle-box of tower, and when uptake zone, top and lower absorbent agent use different absorbents, gravity line will collect liquid discharged to the outer baffle-box of tower; Deflection cone upper surface is used for the guiding fluid catch tray that will collect, and lower surface is used for flue gas speed-raising, promotes the Homogeneous phase mixing of the ozone that second injector sprays and flue gas.
(5) top absorption system: comprise top spraying layer, top arranges top demister, and top spraying layer sprays absorbent, and top demister is for reducing the droplet in flue gas, droplet content, and object reduces the discharge of the solid particulate matter carried in droplet.
(6) exhaust emissions: the flue gas after purification is disposed to air through discharge drum.
The mode of oxidizing that the utility model utilizes gas phase and liquid phase to combine, gaseous oxidation is used for out of stock, and liquid phase oxidation is used for desulfurization, and wherein gas phase oxidation mainly occurs in oxidative system, mainly comprises following reaction:
（1）
；
（2）
；
（3）
；
（4）
；
（5）
；
（6）
；
Wherein, reaction (1), (2), (3) are fast response, (4), (5), (6) are long response time, and in zoneofoxidation, flue-gas temperature scope is not higher than 100 DEG C, reaction rate 7 ~ 10 orders of magnitude faster than the reaction rate of rear three long response times of first three fast response.Therefore, generally, rear three long response times can be ignored, but long response time also can produce in zoneofoxidation.Except oxidation reaction, in zoneofoxidation, also there is the decomposition reaction of following ozone simultaneously:
（1）
；
（2）
；
（3）
；
（4）
；
（5）
；
Ozonolysis reactions comprises: in decomposition reaction (1), (2) of gas phase generation, in the decomposition reaction (3) that surface particles occurs, in decomposition reaction (4), (5) of liquid phase generation.Flue-gas temperature scope in tower is not higher than 100 DEG C, and decomposition reaction 5 ~ 7 orders of magnitude slow in above-mentioned oxidizing reaction rate of gas phase ozone self, the decomposition of ozone self does not affect oxidation efficiency substantially.But, surface particles and drop surface or be dissolved in drop, the decomposition rate of ozone can increase greatly, and reaction rate is than the oxidation efficiency that can have influence on oxidation reaction.Therefore, need to arrange bottom demister above the spraying layer of bottom, reduce the quantity that flue gas carries drop or particle, also need to arrange separating system on oxidative system upper strata, the absorbent preventing top spraying layer from spraying affects the oxidation reaction of carrying out in oxidative system.
Technical advantage of the present utility model:
(1) oxidative system is arranged between top spray system and bottom spray system: flue gas bottom spray system cooling after again with ozone contact, make in the temperature of ozone region lower, thus ensure that ozone has the longer life-span.Accessible air temperature ranges greatly improves and does not need quenching apparatus.
(2) separating system is set between oxidative system and top spray system: separating system role is not limited only to separate upper strata absorbent and lower floor's absorbent, also for separating mixing of upper strata absorbent and flue gas in oxidative system and ozone: ozone has unstability, in the situation of being heated, the decomposition that is attracted to surface particles, all can causes ozone when entering in drop, the oxidation NO of its catabolite oxygen
xspeed significantly lower than ozone oxidation speed.Oxidative system is also carried into the particle of oxidative system or the quantity of drop by flue gas, to carry out insulation blocking further by the bottom demister minimizing in the spray system of bottom.
(3) Forced Mixing device is set at oxidative system ozone and flue gas: the reaction rate of ozone oxidation is very fast, when ideal mixes, can oxidation reaction be completed within 0.2s, but, only ozone is sprayed into tower body by playpipe and mix with flue gas and be difficult to reach desirable mixed effect; Therefore, by catch tray lower surface and ozone baffle plate, ozone diffusingsurface is expanded, makes flue gas can be more abundant with mixing of ozone.Meanwhile, the material of catch tray lower surface and ozone baffle plate needs to select the material of not easily having an effect with ozone to make.The drop that flue gas can not be carried due to bottom demister or the complete Ex-all of particle, simultaneously owing to there is the phenomenons such as fluid spills, catch tray also cannot the absorbent of top spraying layer and oxidative system completely isolated.Therefore, in oxidative system, always there is a certain amount of drop or particle concentration, thus cause ozone accelerated decomposition, affect oxidation effectiveness.Therefore, after the injection of one-level ozone injector, mixing, secondary ozone injector is set and sprays ozone, mix with flue gas.Ensure the NO in flue gas
xefficient Conversion is N
2o
5.Deflection cone lower surface causes flue gas speed-raising to rise, and this link can make ozone more abundant with mixing of flue gas, thus promotes that gas phase oxidation carries out.
(4) difference selective oxidation NO
xand SO
2optimal oxygen agent: due under equilibrium partial pressure, ozone and NO
xsolubility in absorbent is all very little.NO
xbe the oxide mainly existed in the gas phase, and ozone is the oxidant mainly existed in the gas phase, and ozone oxidation NO
xspeed very fast, therefore select ozone as NO
xoxidant.And SO
2solubility in absorbent is comparatively large, and SO
2comparatively slow in the oxidation rate of gas phase, therefore, select Oxygen in Liquid agent to be oxidized SO
2, such as, alkaline absorbent containing dissolved oxygen, hydrogen peroxide, high-valency metal compound.
(5) set up the bypass of cocycle feed flow and catch tray to flow automatically back absorbent pond branch road, in conjunction with gaseous oxidation denitration and liquid phase oxidation desulfurization, regulate by regulating the outer baffle-box pipeline of the flow direction of catch tray gravity line, the flow direction of absorbent pond liquid feeding pipeline and tower to flow to; Thus realize multiplely convertiblely removing pollutant pattern, selectable operation modes comprises: (1) by adjustment second valve 22 be closed condition, the first valve 21 and the 3rd valve 23 be opening, upper and lower spraying layer uses faintly acid absorbent and alkalescent absorbent respectively and opens ozone injection apparatus, realizes lower floor's desulfurization, upper strata denitration; (2) by adjustment the 3rd valve 23 be closed condition, the first valve 21 and the second valve 22 be opening, upper and lower spraying layer uses same absorbent agent, realizes lower floor's desulfurization, upper strata deep desulfuration; (3) by adjustment second valve 22 be closed condition, the first valve 21 and the 3rd valve 23 be opening, upper and lower spraying layer uses alkalescent absorbent also to open ozone injection apparatus, realizes lower floor's desulfurization, upper strata desulphurization denitration.
(6) do not need in tower body to arrange the object that Multi-level deflector plate can reach oxidation sweetening, denitration.The sulphur deviate from, nitrogen resource can recycle respectively, again utilize.SO in flue gas
2with NO
xatmosphere pollution, but, if can collect and be used, be also valuable Sulphur ressource and nitrogen resource.SO
2recycling can relax the present situation of the current Sulphur ressource shortage of China to a certain extent.For NO
x, current nitric acid is take air as raw material by oxidation of nitrogen for NO is oxidized nitric acid processed, more further by NO
xit is NO and by NO that recycling can be saved oxidation of nitrogen
xbe reduced to the energy of useless nitrogen.
To sum up chatted, the utility model have technique and system simple, desulphurization denitration function can be realized efficiently, multiple modes of operation can be applicable to multiple flue gas, sulphur nitrogen resource can independently be recycled feature, flue gas or exhuast gas desulfurization denitration process can be widely used in.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in more detail.
Fig. 1 is single tower oxidation sweetening denitrification apparatus structural representation of the present utility model.
Fig. 2 is the ozone baffle arrangement schematic diagram of the utility model embodiment one.
Fig. 3 is the ozone baffle arrangement schematic diagram of the utility model embodiment two.
Fig. 4 is the ozone baffle arrangement schematic diagram of the utility model embodiment three.
Fig. 5 is the ozone baffle arrangement schematic diagram of the utility model embodiment four.
Fig. 6 is the ozone baffle arrangement schematic diagram of the utility model embodiment five.
Fig. 7 is the ozone baffle arrangement schematic diagram of the utility model embodiment six.
Reference numeral: 1-absorption tower tower body, 2-top spraying layer, 3-deflection cone, 4-catch tray, 5-second injector, 6-first injector, 7-ozone baffle plate, 8-bottom spraying layer, 9-agitator, 10-air or oxygen air inlet pipeline, the bypass of 11-circulating feeding liquid, 12-ozone transfer pipeline, 13-Sulphur ressource reclaim line, the outer baffle-box of 14-tower, 15-nitrogen resource reclaim pipeline, 16-top demister, 17-bottom demister, 18-gravity line, 19-discharge drum, 20-air induction mast, 21-first valve, 22-second valve, 23-the 3rd valve.
Detailed description of the invention
Embodiment is shown in Figure 1, this single tower oxidation sweetening denitrification apparatus, comprise the absorption tower tower body 1 of tubular, be positioned at the air induction mast 20 of tower body bottom, absorption tower, be positioned at the aiutage 19 on tower body top, absorption tower, the outer baffle-box 14 of tower being arranged on absorbent pond in absorption tower tower body 1 and absorption system and being connected with absorption tower tower body 1, also comprise oxidative system and separating system, described single tower oxidation sweetening denitrification apparatus is followed successively by absorbent pond from bottom to top along flue gas flow direction, lower absorbent system, oxidative system, separating system and top absorption system, described separating system is communicated with by the outer baffle-box 14 of pipeline and tower.
Described oxidative system comprises ozone transfer pipeline 12, be connected to the first injector 6 of every root ozone transfer pipeline 12 end and second injector 5 and the ozone baffle plate 7 below first injector 6, described first injector 6 and second injector 5 are oppositely arranged, wherein first injector 6 is positioned at below, its port spraying ozone gas is downward, and wherein second injector 5 is positioned at top, it sprays the port of ozone gas upwards.
Described separating system comprises the gravity line 18 be positioned at through oxidative system on tower body axis, absorption tower, is connected to the catch tray 4 of the back taper tubular of gravity line 18 upper end and is positioned at the deflection cone 3 of the annular above catch tray, and the lower surface of described catch tray 4 is positioned at the top that second injector 5 sprays the port of ozone gas.
Described ozone transfer pipeline 12 and be connected to the first injector 6 of every root ozone transfer pipeline 12 end and second injector 5 has 1 ~ 8 group, described ozone transfer pipeline 12 is connected to the inner side of absorption tower tower body around gravity line 18 hoop uniform intervals, the corresponding one piece of ozone baffle plate 7 in the below of each first injector 6, wherein the angle of first injector 6 and second injector 5 port and vertical direction that spray ozone gas is all no more than 45 °.
Described deflection cone 3 hoop is fixed on the inwall of absorption tower tower body 1, its upper surface by the one end be connected with absorption tower tower body 1 inwall to catch tray 4 tilt and exceed the edge of catch tray 4, lower surface is tilted by the inwall of the one end being positioned at catch tray 4 to absorption tower tower body 1, the longitudinal section of deflection cone is the triangle be made up of top surface edge, lower surface edge and absorbing tower body sidewall edge three.
The shape of described ozone baffle plate 7 is one or more in fan-shaped, circular, oval, triangle, quadrangle, convex or concave shape, see shown in Fig. 2 to Fig. 7, for four groups of ozone transfer pipelines 12, first injector 6 and second injector 5, ozone baffle plate 7 also has four, symmetrical centered by tower body axis, absorption tower, the embodiment of six kinds of ozone baffle shapes is provided, in order to adapt to different flue gas flow rate, NO in figure
xconcentration or regulate different oxidation products.
Described absorbent pond is communicated with smoke inlet pipe road 10 and Sulphur ressource reclaim line 13, and absorbent pond is communicated with air or oxygen air inlet pipeline 10 and has agitator 9 in absorbent pond; The outer baffle-box 14 of described tower is communicated with nitrogen resource reclaim pipeline 15, and agitator is arranged at the bottom of the outer baffle-box 14 of tower.
The bottom demister 17 that described lower absorbent system comprises bottom spraying layer 8 and is positioned at above bottom spraying layer 8, described bottom spraying layer 8 is communicated with absorbent pond by circulating feeding liquid bypass 11; Described top absorption system comprises top spraying layer 2 and is positioned at the top demister 16 above top spraying layer 2, described top spraying layer 2 is communicated with absorbent pond by circulating feeding liquid bypass 11, by pipeline and tower outward baffle-box 14 be communicated with.
A kind of desulfurization denitration method applying described single tower oxidation sweetening denitrification apparatus, flue gas enters absorption tower tower body 1 by air induction mast 20, successively through agitator 9, bottom spraying layer 8 and bottom demister 17, in its middle and lower part spraying layer 8, spray desulfurizing agent, absorb SO wherein
2, remove SO
2after flue gas enter oxidative system; First injector 6 in oxidative system sprays ozone to the diffusion of ozone baffle plate, first carries out mixed once and oxidation reaction with flue gas, sprays ozone subsequently spread to catch tray lower surface by second injector 5, then carries out secondary with flue gas and mix and oxidation reaction; After flue gas leaves oxidative system, top absorption system is entered by separating system, the absorbent that top spraying layer 2 sprays by catch tray 4 reclaims and is disposed to diverse location through gravity line 18: when top absorption system and lower absorbent system use absorbent of the same race, gravity line by the liquid collected discharged to the outer baffle-box 14 of absorbent pond or tower, when top absorption system and lower absorbent system use different absorbents, gravity line by the liquid collected discharged to the outer baffle-box 14 of tower; Flue gas is discharged by aiutage 19 after top spraying layer 2 and top demister 16 are cleaned again.
Wherein, when flue gas enters absorbent pond, in absorbent pond, provide air or oxygen that liquid phase sulphur is oxidizing to highest price by air or oxygen air inlet pipeline.
Regulate by regulating the outer baffle-box pipeline of the flow direction of catch tray gravity line, the flow direction of absorbent pond liquid feeding pipeline and tower to flow to; Thus realize multiplely convertiblely removing pollutant pattern, namely by adjustment first valve 21, second valve 22 and the opening of the 3rd valve 23 and the kind of absorbent, carry out the switching of multiple-working mode:
The first pattern: the second valve 22 is closed condition by regulating, the first valve 21 and the 3rd valve 23 are opening, upper and lower spraying layer uses two kinds of different absorbents respectively, upper strata uses faintly acid absorbent, lower floor uses alkalescent absorbent, open ozone injection apparatus simultaneously, realize lower floor's desulfurization, upper strata denitration.
The second pattern: be closed condition by regulating the 3rd valve 23, the first valve 21 and the second valve 22 be opening, upper and lower spraying layer uses identical alkalescent absorbent, realizes lower floor's desulfurization, upper strata deep desulfuration.
The third pattern: the second valve 22 is closed condition by regulating, the first valve 21 and the 3rd valve 23 are opening, and upper and lower spraying layer uses identical alkalescent absorbent and opens ozone injection apparatus, realizes lower floor's desulfurization, upper strata desulphurization denitration.
In purification process of the present utility model, ozone baffle plate, ozone spray orientation, catch tray lower surface, deflection cone, first injector and second injector at zoneofoxidation ozone oxidation NO
xeffect aspect serve key effect.
(1) catch tray lower surface and deflection cone are to the facilitation effect of ozone and flue gas mixed effect: when not having catch tray, and mixed process does not exist the facilitation of catch tray lower surface to ozone and flue gas, the situation that both software simulations mix.When not having catch tray lower surface to raise speed to flue gas, the mixability unevenness of ozone and flue gas is up to 70%; When there being catch tray lower surface to raise speed to flue gas/exhaust gas, the mixability unevenness of ozone and flue gas/exhaust gas is no more than 20%.
(2) first injector and second injector are to the facilitation effect of ozone and flue gas mixed effect: only have first injector to deposit in case, when not considering ozone decomposed, the mixability unevenness of ozone and flue gas/exhaust gas is about 15 ~ 20%; Consider ozone decomposed, the unevenness of real gas mixing can be lower; Only have second injector to deposit in case, when not considering ozone decomposed, ozone is same about 15 ~ 20% with the mixability unevenness of flue gas/exhaust gas; Consider ozone decomposed, the unevenness of real gas mixing can be lower.But through one-level ozone injector and the acting in conjunction of secondary ozone injector, the actual mixability unevenness of ozone and flue gas/exhaust gas can control within 5%, thus makes oxidation reaction efficiently complete, ensure NO
xremoval efficiency.
(3) ozone baffle plate is to the facilitation effect of ozone and flue gas mixed effect: when not having ozone baffle plate, no matter be that ozone upwards sprays, or ozone Jet with downward flow direction, the mixability unevenness of ozone and flue gas/exhaust gas is between 50 ~ 60%, and after setting up ozone baffle plate, the mixability unevenness that first injector sprays ozone and flue gas/exhaust gas can control about 15% ~ 20%.The effect of ozone baffle plate is very important.
(4) ozone sprays the facilitation effect of orientation and flue gas mixed effect: because flue gas flow rate field is uneven along tower cross-sectional distribution in zoneofoxidation, thus the distance of ozone injector and absorption tower tower body and the spray angle of ozone injector can have an impact to mixed effect, therefore, the angle of first injector 6 and second injector 5 port and vertical direction that spray ozone gas is all no more than 45 ° to realize optimized effect.
Claims (8)
1. a single tower oxidation sweetening denitrification apparatus, comprise the absorption tower tower body (1) of tubular, be positioned at the air induction mast (20) of tower body bottom, absorption tower, be positioned at the aiutage (19) on tower body top, absorption tower, the outer baffle-box (14) of tower being arranged on absorbent pond in absorption tower tower body (1) and absorption system and being connected with absorption tower tower body (1), it is characterized in that: also comprise oxidative system and separating system, described single tower oxidation sweetening denitrification apparatus is followed successively by absorbent pond from bottom to top along flue gas flow direction, lower absorbent system, oxidative system, separating system and top absorption system, described separating system is communicated with by the outer baffle-box (14) of pipeline and tower.
2. single tower oxidation sweetening denitrification apparatus according to claim 1, it is characterized in that: described oxidative system comprises ozone transfer pipeline (12), be connected to the first injector (6) of every root ozone transfer pipeline (12) end and second injector (5) and the ozone baffle plate (7) in first injector (6) below, described first injector (6) and second injector (5) are oppositely arranged, wherein first injector (6) is positioned at below, its port spraying ozone gas is downward, wherein second injector (5) is positioned at top, it sprays the port of ozone gas upwards.
3. single tower oxidation sweetening denitrification apparatus according to claim 2, it is characterized in that: described separating system comprises the gravity line (18) be positioned at through oxidative system on tower body axis, absorption tower, is connected to the catch tray (4) of the back taper tubular of gravity line (18) upper end and is positioned at the deflection cone (3) of the annular above catch tray, the lower surface of described catch tray (4) is positioned at the top that second injector (5) sprays the port of ozone gas;
The pipeline that described gravity line (18) is communicated with the outer baffle-box (14) of tower is connected with the 3rd valve (23), and the both sides up and down gravity line (18) being positioned at this pipeline are connected to the second valve (21) and the second valve (22).
4. the single tower oxidation sweetening denitrification apparatus according to claims 1 to 3 any one, it is characterized in that: described ozone transfer pipeline (12) and be connected to the first injector (6) of every root ozone transfer pipeline (12) end and second injector (5) has 1 ~ 8 group, described ozone transfer pipeline (12) is connected to the inner side of absorption tower tower body around gravity line (18) hoop uniform intervals, the corresponding one piece of ozone baffle plate (7) in below of each first injector (6), wherein first injector (6) and second injector (5) spray the port of ozone gas and the angle of vertical direction is all no more than 45 °.
5. single tower oxidation sweetening denitrification apparatus according to claim 4, it is characterized in that: described deflection cone (3) hoop is fixed on the inwall of absorption tower tower body (1), its upper surface by the one end be connected with absorption tower tower body (1) inwall to catch tray (4) tilt and exceed the edge of catch tray (4), lower surface is tilted by the inwall of the one end being positioned at catch tray (4) to absorption tower tower body (1), the longitudinal section of deflection cone is the triangle be made up of top surface edge, lower surface edge and absorbing tower body sidewall edge three.
6. single tower oxidation sweetening denitrification apparatus according to claim 1, is characterized in that: the shape of described ozone baffle plate (7) is one or more in fan-shaped, circular, oval, triangle, quadrangle, convex or concave shape.
7. single tower oxidation sweetening denitrification apparatus according to claim 1, it is characterized in that: described absorbent pond is communicated with smoke inlet pipe road (10) and Sulphur ressource reclaim line (13), absorbent pond is communicated with air or oxygen air inlet pipeline (10) and has agitator (9) in absorbent pond;
The outer baffle-box (14) of described tower is communicated with nitrogen resource reclaim pipeline (15), and agitator is arranged at the bottom of the outer baffle-box (14) of tower.
8. single tower oxidation sweetening denitrification apparatus according to claim 1, it is characterized in that: described lower absorbent system comprises bottom spraying layer (8) and is positioned at the bottom demister (17) of bottom spraying layer (8) top, and described bottom spraying layer (8) is communicated with absorbent pond by circulating feeding liquid bypass (11);
Described top absorption system comprises top spraying layer (2) and is positioned at the top demister (16) of top spraying layer (2) top, described top spraying layer (2) is communicated with absorbent pond by circulating feeding liquid bypass (11), by pipeline and tower outward baffle-box (14) be communicated with.
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Cited By (5)
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| CN105148699A (en) * | 2015-09-02 | 2015-12-16 | 北京国电龙源环保工程有限公司 | Single-tower oxidizing desulfurization and denitration device and method |
| CN105879621A (en) * | 2016-05-12 | 2016-08-24 | 大唐环境产业集团股份有限公司 | Two-section type dual-circulation desulfurization and denitrification device and method for realizing near zero emission |
| CN109794156A (en) * | 2019-03-25 | 2019-05-24 | 大连理工大学 | A kind of collection desulphurization denitration, dedusting and the integrated high-efficiency multi-function flue gas waste heat recovery tower of condensing hot air furnace |
| CN110141960A (en) * | 2019-05-27 | 2019-08-20 | 张波 | A kind of chain oxidation unit of ammonia process of desulfurization denitrating system |
| CN110465175A (en) * | 2018-05-10 | 2019-11-19 | 中国石油化工股份有限公司 | Flue-gas dust-removing and desulfurization tower and flue gas ash removal, desulfurization and wastewater treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105148699A (en) * | 2015-09-02 | 2015-12-16 | 北京国电龙源环保工程有限公司 | Single-tower oxidizing desulfurization and denitration device and method |
| CN105148699B (en) * | 2015-09-02 | 2018-01-12 | 北京国电龙源环保工程有限公司 | A kind of single column oxidation sweetening denitrification apparatus and its desulfurization denitration method |
| CN105879621A (en) * | 2016-05-12 | 2016-08-24 | 大唐环境产业集团股份有限公司 | Two-section type dual-circulation desulfurization and denitrification device and method for realizing near zero emission |
| CN110465175A (en) * | 2018-05-10 | 2019-11-19 | 中国石油化工股份有限公司 | Flue-gas dust-removing and desulfurization tower and flue gas ash removal, desulfurization and wastewater treatment method |
| CN109794156A (en) * | 2019-03-25 | 2019-05-24 | 大连理工大学 | A kind of collection desulphurization denitration, dedusting and the integrated high-efficiency multi-function flue gas waste heat recovery tower of condensing hot air furnace |
| CN110141960A (en) * | 2019-05-27 | 2019-08-20 | 张波 | A kind of chain oxidation unit of ammonia process of desulfurization denitrating system |
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