CN102463015B - Desulfurization and denitrification method and treatment device for marine exhaust gas - Google Patents
Desulfurization and denitrification method and treatment device for marine exhaust gas Download PDFInfo
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- CN102463015B CN102463015B CN201010540886.0A CN201010540886A CN102463015B CN 102463015 B CN102463015 B CN 102463015B CN 201010540886 A CN201010540886 A CN 201010540886A CN 102463015 B CN102463015 B CN 102463015B
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Abstract
The invention discloses a desulfurization and denitrification method and a treatment device for marine exhaust gas. Exhaust gas produced by a marine diesel engine is treated with ozone, hydrogen peroxide and a neutralizing agent, and the neutralizing agent is sodium chloride with the characteristics of high desulfurization and denitrification capacities, low price and extraction from seawater at any time. Being different from high-irritation and toxic ammonia neutralizing agents, on-board permission of sodium chloride is not required, so that the problems of inconvenience in using and managing other similar neutralizing agents and adverse effects on the living environment of shipmen can be solved; and on the other hand, a neutral salt with a high added value is produced in a neutralizing treatment process, and is recovered through an exhaust pipe at the bottom of a reaction groove, so that the recovery rate and reutilization ratio of the neutral salt are increased greatly. Regions are partitioned inside the reaction space of a porous plate for distributing air current, so that ozone treatment, hydrogen peroxide treatment and neutralizing agent treatment are performed separately respectively. Exhaust gas treatment can be performed under a uniform distribution condition, so that treatment efficiency is increased.
Description
[technical field]
Technical field of the present invention belongs to use ozone, hydrogen peroxide and nertralizer and processes marine diesel engine institute waste air one class.Particular content of the present invention is: use the nertralizer of sodium chloride cheap, that can extract from seawater at any time as desulphurization and denitration.In neutralization reaction process, produce the neutral salt of high additive value, reclaim by the comb of reaction tank bottom.Porous plate distributes air-flow and divides the interior zone of reaction compartment, makes ozone treatment, hydrogen peroxide treatment and nertralizer processing be able to each leisure and independently in space, carries out.
[background technology]
Recently, along with industrial accelerated development, the consumption demand of the various chemical fuels such as oil, coal is also sharply increased.When chemical fuel burning, produce various pernicious gases and cause atmosphere pollution day by day serious, wherein the most representative example is exactly coal smoke and acid rain.
As mentioned above, the discharge such as vehicle motor, Coal fired power station and factory contains oxysulfide (SO
x) and nitre oxide (NO
x) waste gas, make chemical substance become the main cause of atmosphere pollution.Along with the raising of nearest people's environmental consciousness, not only in policy, limit the discharge of oxysulfide, nitrogen oxide, also carry out like a raging firely about the research of how to remove waste gas institute's sulfur-containing oxide and nitrogen oxide.
First, because the oxysulfide having the greatest impact is produced by fuel combustion conventionally, therefore select sulphur removal or not the fuel of sulfur-bearing be to prevent one of method producing in combustion process oxysulfide.In policy, carry out Desulphurization of fuels scheme simultaneously.Encourage to use the desulfurized fuels such as sulfur-free gasoline.
But from the aspect of industrial economy, inevitably to use sulfurous fuels, now just must be equipped with in desulphurization plant with fuel combustion after the oxysulfide gas of discharging.In order to control oxysulfide gas purging concentration, existing legal provisions factory or power station must be equipped with desulphurization plant at present.
Even if having above-mentioned desulphurization plant, part nitrogen oxide still cannot be removed completely, finally discharged to atmosphere, brings thus the burden that must be equipped with denitration device when being equipped with desulphurization plant.For this burden is minimized, existing people's application is about method and the device of exhuast gas desulfurization denitration, be registered in separately Korea S's publication communique No. 1999-8963 No. 10-355179th, (publication date: on 02 05th, 1999) and Korean Patent Registration communique (date of registration: on 09 19th, 2002), is widely known by the people.
With the former corresponding diesel engine exhaust processing method and device, in its waste gas of to the effect that discharging to Diesel engine, add hydrogen peroxide H
2o
2, imported plasma reactor, react and generate commercial sulphuric acid H by corona discharge
2sO
4or nitric acid HNO
3, add afterwards nertralizer ammonia NH
3, sulfuric acid and nitric acid are changed into ammonium salt NH
4hSO
4and NH
4nO
3, these ammonium salts can obtain by the mode of collecting, mainly as chemical fertilizer.
Meanwhile, the ozone waste gas desulphurization denitration method relevant to the latter and device thereof to the effect that make institute's sulfur-containing oxide and nitrogen oxide and ozone O in waste gas
3after reaction changes into sulfuric acid and nitric acid, then make neutralization reaction with nertralizer ammonia.In neutralisation treatment process, generate ammonium salt, collect these ammonium salts and reclaim.Porous plate is set in the hybrid reaction groove that carries out ozone reaction and neutralization reaction to distribute off-gas flows.
In addition, every sanction measure, immediately following environmental protection trend, is put into effect in countries in the world, and making unremitting effort for control environmental pollution has become trend.Comply with this trend, be in exploration step about how process the scheme that produces oxysulfide and nitrogen oxide in ship's navigation process on boats and ships.As a ring of processing scheme, the desulphurization and denitration facture of attempting land to use is applied on boats and ships.
The desulphurization denitration method applicable when land is applied on boats and ships, and owing to using nertralizer ammonia, problem is also following.First, ammonia is strong, poisonous, the harmful material of a kind of excitant, must be through loaded down with trivial details prior requisition procedure as will be aboard ship used and preserve.
Secondly, once storage tank generation ammonia leak, by life and healthy aspect bring huge adverse effect to the crewman who lives aboard ship.Ammoniacal liquor, as the nertralizer of processing waste gas, is generally taken care of in the airtight place of engine room and so on.Therefore, must carefully take care of in order to prevent that ammoniacal liquor from leaking.
From the treatment effeciency of waste gas, take ozone waste gas desulphurization denitration method and device thereof as example, porous plate is set in hybrid reaction groove with mean allocation air-flow, improve reaction efficiency.But in fact, above-mentioned porous plate is arranged on central authorities in hybrid reaction groove, and ozone spout and nertralizer spout are positioned at entrance and the outlet of hybrid reaction groove separately, therefore cannot improve the treatment effeciency of waste gas.
In other words, waste gas flows into from the hybrid reaction groove porch that is provided with ozone spout, and because air-flow is not by porous plate, ozone treatment cannot be carried out under even, safe distribution of air flow condition.In addition, although off-gas flows becomes evenly by porous plate, again become inhomogeneous in hybrid reaction groove exit.Thus, neutralisation treatment is difficult to carry out under even, safe distribution of air flow condition.
In neutralisation treatment process, generate the ammonium salt of high value, in order to reclaim ammonium salt, remove fine solid particle, dry collector must be set, be i.e. sack cleaner (Bag filter) and electronic precipitator.Because ammonium salt mixes mutually with fine solid particle, be difficult to separate, bring difficulty to the recycling of ammonium salt.
Moreover, in the removal process of ammonium salt, dry collector can only be used, the wet scrubber that can dissolve ammonium salt can not be used.But pocket type and electronic precipitator cannot catch the hygroscopy powder dust particle that size is 1 μ m (micron).The desulphurization denitration that cannot effectively complete thus waste gas is processed and dust removal process.
For these reasons, for solving the oxysulfide, nitrogen oxide and the fine solid particle problem that occur in ship's navigation way, make to process and can aboard ship carry out more efficiently, eliminate the adverse effect that on ship, permanent crewman produces, the improvement scheme that makes existing exhaust-gas treatment method and device can be applicable to boats and ships is tried to explore simultaneously.
[summary of the invention]
The invention discloses a kind of marine exhaust desulphurization denitration processing method and device, use the nertralizer of sodium chloride cheap and that can extract at any time as desulphurization denitration from seawater, can fundamentally solve thus and use need to go on board especially during as nertralizer license, keeping of ammonia loaded down with trivial details and crewman's life and health are caused to the problem of adverse effect.The matter of utmost importance that this solves for the present invention.
Secondly, be recovered in the neutral salt that produces high additive value in waste gas treatment process by the comb of reaction tank bottom, neutral salt just can separate recovery with fine dust thus, improves the efficiency of neutral salt recycling.Meanwhile, except dry collector, can also use the high-efficiency wet-type dust collector of Venturi scrubber (venturi scrubber) and so on, thereby improve the treatment effeciency of fine dust.The Second Problem that this solves for the present invention
Finally, distribute the porous plate of air-flow to divide reactive tank inner space, ozone treatment, hydrogen peroxide treatment and neutralisation treatment are able to independently carrying out in space separately, reaction can be carried out under safety, uniform distribution of air flow condition, thereby make reaction more efficient, greatly strengthen the performance of exhuast gas desulfurization denitration processing.The 3rd problem that this solves for the present invention.
For achieving the above object, the technical scheme that the present invention takes is as follows:
A kind of marine exhaust desulphurization denitration processing method, comprises filtration step, removes the dust in marine diesel engine institute waste air; Ozone treatment step, the waste gas complete to dedusting sprays ozone; Hydrogen peroxide treatment step, the waste gas complete to ozone treatment sprays hydrogen peroxide; Neutralisation treatment step, the waste gas complete to hydrogen peroxide treatment sprays nertralizer; Dust removal step, removes contained fine solid particle in the complete waste gas of neutralisation treatment.In above-mentioned neutralisation treatment step, use sodium-chloride water solution as nertralizer, with institute's sulfur-containing oxide and reaction of nitrogen oxides in waste gas; Reaction tank bottom precipitates the product-neutral salt of this secondary response; Neutral salt reclaims by the comb that is arranged on reaction tank bottom.
The feature of desulphurization denitration facture is: in above-mentioned ozone treatment step, hydrogen peroxide treatment step and neutralisation treatment step, waste gas is by flowing to 3 regions delimiting by porous plate successively, and reaction is independently carrying out in space separately; Or above-mentioned ozone treatment and hydrogen peroxide treatment step carry out in the same space, neutralization reaction is carried out in another space.
As mentioned above, on the marine diesel engine blast pipe of this device after prolongation, filter is set; The reactive tank of set handling waste gas between above-mentioned filter and deduster; The nertralizer spout that order is loaded onto the ozone spout being connected with ozone supply pipe, the hydrogen peroxide spout being connected with hydrogen peroxide supply pipe, is connected with nertralizer supply pipe in above-mentioned reactive tank.Upper pertusate porous plate becomes 3 spaces above-mentioned reactive tank interior separation, is respectively: the first space, second space and the 3rd space.The first interior volume top arranges ozone spout, and second space inner and upper arranges hydrogen peroxide spout, and the 3rd interior volume top arranges nertralizer spout.Above-mentioned nertralizer feeder is the supply mean of sodium-chloride water solution, and the 3rd bottom, space is provided with the comb with safety valve.
In other examples of the present invention, above-mentioned reactive tank is divided into the first reactive tank and the second reactive tank, each reactive tank is connected with blast pipe.In the first reactive tank, top arranges ozone spout and hydrogen peroxide spout, establishes multiple porous plates with holes and be separated out reaction compartment and distribute air-flow in the second reactive tank.Nertralizer spout is set above above-mentioned reaction compartment, and bottom arranges comb.Above-mentioned high-pressure water pipe connects Venturi scrubber (venturi scrubber) deduster.
Beneficial effect of the present invention is:
The nertralizer sodium chloride of marine exhaust is not only cheap, can from seawater, extract at any time, and also nontoxic, harmless.Different from nertralizer ammonia, do not need to go on board especially license and loaded down with trivial details keeping program, can fundamentally solve the adverse effect that ammonia causes crewman's life, health.
In neutralization reaction process, produce the neutral salt of high additive value, this neutral salt is not to reclaim by deduster, but directly reclaims by the comb that is arranged on reaction tank bottom, and neutral salt does not mix mutually with fine solid particle.Under this state, improve the effect of recycling.Set up on this basis high-efficiency wet-type dust collector, under acting in conjunction, in exhuast gas desulfurization denitration, remove fine solid particle, effect is remarkable.
In the space that ozone treatment, hydrogen peroxide treatment and neutralisation treatment are separated out at porous plate, carry out separately.Porous plate safety, distribute air-flow equably, with this understanding, the corresponding chemical reaction of various processes has more efficiency.Thus, the handling property of exhuast gas desulfurization denitration obtains essence and promotes, and can give play to larger effect.
[accompanying drawing explanation]
Fig. 1 is the flow chart of marine exhaust desulfurization denitration method of the present invention.
Fig. 2 is the sectional view for the treatment of apparatus 10 in first embodiment of the invention.
Fig. 3 is the sectional view for the treatment of apparatus 10 in second embodiment of the invention.
Fig. 4's
(A) with
(B) be the front elevation of porous plate 3, mainly use on treating apparatus.
Fig. 5 is the sectional view for the treatment of apparatus 10 in third embodiment of the invention.
The part label relating in accompanying drawing is as follows:
1. reactive tank
2. blast pipe
3. porous plate
3a. hole
4. filter
5. ozone spout
6. hydrogen peroxide spout
7. nertralizer spout
8. deduster
9. comb
9a. comb safety valve
10. emission-control equipment
10a. the 1st space
10b. the 2nd space
10c. the 3rd space
11. ozone supply devices
11a. ozone supply pipe
12. hydrogen peroxide feeders
12a. hydrogen peroxide supply pipe
13. nertralizer feeders
13a. nertralizer supply pipe
14. Venturi scrubbers
15. high-pressure water pipe
16. the 1st reactive tanks
17. the 2nd reactive tanks
17a. reaction compartment
[specific embodiment]
Illustrate how to reach above-mentioned target below with reference to accompanying drawing of the present invention.
Fig. 1 is the flow chart of marine exhaust desulfurization denitration method of the present invention.As shown in Figure 1, flow process comprises: filtration step S1, removes contained dust in marine diesel engine combustion gas; Ozone treatment step S2, the waste gas complete to dedusting sprays ozone; Hydrogen peroxide treatment step S3, the waste gas complete to ozone treatment sprays hydrogen peroxide; Neutralisation treatment step S4, the waste gas complete to hydrogen peroxide treatment sprays nertralizer; And dust removal step S5, remove contained fine solid particle in the complete waste gas of neutralisation treatment.
In above-mentioned filtration step S1, by being arranged on the filter in blast pipe, remove contained corpuscular type material in waste gas, as solid carbon, solid sulfur, oxycarbide etc.Above-mentioned dust removal step S5 finally removes filtration step S1 fine solid particle that do not remove, after desulphurization denitration.
Above-mentioned ozone treatment step, as the initial reaction step after filtration step, is sprayed ozone to the waste gas flowing in reactive tank.In waste gas, the sulfur-containing oxide SOx of institute and nitrogen oxide NOx and ozone play oxidation reaction, and concrete reaction equation is as follows:
SO
2+O
3→SO
3+O
2
NO+O
3→NO
2+O
2
2NO
2+O
3→O
2+N
2O
5↓
As mentioned above, in the process of ozone treatment step S2, produce sediment N
2o
5.In nitrogen oxide, N
2o
5not only can not cause atmosphere pollution, and practical value is very high.Anhydrous nitrogen is deposited in reaction tank bottom, reclaims by the comb that is arranged on reaction tank bottom.
Through above-mentioned ozone treatment step S2, the hydrogen peroxide H that is 10～30% to the complete waste gas spray concentration of oxidation
2o
2dilution (hydrogen peroxide), the sulfur-containing oxide SO of institute in waste gas
3with nitrogen oxide NO
2react with hydrogen peroxide dilution, this is and the 2nd step of hydroperoxidation.Concrete reaction equation is as follows:
SO
3+H
2O
2→H
2SO
4
NO
2+H
2O
2→NHO
3+NHO
2
Through above-mentioned hydrogen peroxide treatment step S3, oxysulfide SO
3with nitrogen oxide NO
2change into separately sulfuric acid H
2sO
4with nitric acid NHO
3.The nitrous acid NHO producing in this process
2be a very unsettled alkali acid, very easily with through the residual oxygen molecule of ozone treatment step S2 react, generate nitric acid.
Through after above-mentioned hydrogen peroxide treatment step S3, will experience a most important ring-neutralisation treatment step S4 in the present invention, this is the 3rd step of the present invention.Hereinto with treatment step S4 in, use sodium chloride replace the ammonia all the time using in desulphurization denitration process, working concentration is for 10～30% sodium chloride nacl aqueous solution are as the sulfur acid H of institute in nertralizer and waste gas
2sO
4and nitric acid NHO
3reaction, concrete reaction equation is as follows:
H
2SO
4+NaCl→HCl+NaHSO
4↓
HNO
3+NaCl→HCl+NaNO
3↓
HCl+NaCl+O
2→NaOH+Cl
2
At above-mentioned neutralisation treatment step S4, compared with nertralizer ammonia, sodium chloride is cheap, can from seawater, extract at any time, nontoxic, can not produce adverse effect to human body.Therefore best nertralizer when it is the processing of marine exhaust desulphurization denitration.Moreover, identical during with ammonia react, can additionally obtain the neutral salt NaHSO of high additive value
4and NaNO
3.
In above-mentioned neutralisation treatment step S4, the extra neutral salt obtaining is deposited in reaction tank bottom, reclaims by the comb that is arranged on reaction tank bottom.In neutralization reaction process, generate hydrogen chloride HCl gas and fine solid particle, this fine solid particle will be absorbed by deduster at dust removal step S5 and remove.
The neutral salt generating in above-mentioned treatment step S4 is not to be absorbed by deduster together with fine solid particle, but directly reclaim by the comb that is arranged on reaction tank bottom, neutral salt is not mixed with fine solid particle, greatly improved thus comfort level and the efficiency of recycling.
Moreover, because neutral salt is reclaimed by reactive tank in S4 step, therefore at dust removal step S5 except using the dry collectors such as sack cleaner, also can use Venturi scrubber (venturi scrubber) high-efficiency wet-type dust collector.The disturbing factor while reclaiming neutral salt can be removed thus, contained hygroscopy in waste gas (solid runs into the character that moisture dissolves) particle and fine solid particle can be removed simultaneously completely.
In above-mentioned nertralizer treatment step S4, obtain neutral salt as additional product.Wherein, niter cake NaHSO
4can be used as analyzing the solvent of various chemical compositions, as platinum cleaning agent etc.Sodium nitrate NaNO
3can be used as the raw material of common herbicide, medicine, chemicals and cultivate penicillin etc., of many uses.
As mentioned above, the condition of the most applicable ozone treatment step S2 of marine exhaust desulphurization denitration facture, hydrogen peroxide treatment step S3 and neutralisation treatment S4 is: by toxic emission direction, reactive tank is set, the porous plate that distributes air-flow is set in reactive tank, the inside of reactive tank is divided into 3 respective reaction spaces.In 3 spaces that each reactions steps S2, S3 and S4 are separated out at porous plate, independently carry out separately.
Carry out in the above described manner treatment step S2, S3 and S4, in the space being separated out at porous plate, air-flow will flow into reactive tank under safety, uniform distributive condition.Thus, the corresponding chemical reaction of each reactions steps S2, S3 and S4 is more efficient, and the handling property of exhuast gas desulfurization denitration is greatly improved.
While carrying out above-mentioned ozone treatment step S2 and hydrogen peroxide treatment step S3, can, according to required, separate without porous plate, but carry out at same reaction compartment.In the present invention, most important neutralisation treatment step S4 carries out at another reaction compartment.Each reactions steps S2, S3 and S4 all, under equal distribution of air flow condition, react smooth.
Below, for the optimization process device allocation plan of marine exhaust desulphurization denitration facture of the present invention, describe in detail with reference to figure 2～5.
Fig. 2 is the sectional view of first embodiment of the invention treating apparatus 10 used.On the marine diesel engine blast pipe 2 extending, dust removal filter 4 and deduster 8 are set, between above-mentioned dust removal filter 4 and deduster 8, reactive tank 1 are set and process waste gas.Above-mentioned dust removal filter can use the plain filter products such as fabric filter, adhesive-bonded fabric filter and active carbon filter, and above-mentioned deduster 8 can use the dry collector such as sack cleaner, electronic precipitator.
The nertralizer spout 7 that the order of carrying out according to reaction above above-mentioned reactive tank 1 is interior has set gradually the ozone spout 5 being connected with ozone supply pipe 11a and ozone supply device 11, the hydrogen peroxide spout 6 being connected with hydrogen peroxide supply pipe 12a and hydrogen peroxide feeder 12, has been connected with nertralizer supply pipe 13a and nertralizer feeder 13.
Main being responsible for of above-mentioned ozone supply device 11 produced and ozone supply, can use the product of any kind, generally has 2 kinds of chassis type (Plate) and casts (Tube).The principle of ozone supply device is: air is cleaned by filter after compressor compression.After being arranged on the discharge tube processing on cooling-water duct, airborne oxygen and current response, make oxygen decompose combination again, thereby generate ozone.
Be 10～30% hydrogen peroxide and sodium chloride dilution at above-mentioned hydrogen peroxide feeder 12 and the interior concentration that stores respectively of nertralizer feeder 13, under the effect of not shown pump, dilution passes through respectively hydrogen peroxide supply pipe 12a and nertralizer supply pipe 13a, sprays from hydrogen peroxide spout 6 and nertralizer spout 7.
The effect of porous plate is identical with above-mentioned neutralisation treatment step, is the important component part of emission-control equipment 10 of the present invention.On porous plate 3, there are multiple hole 3a for distributing air-flow, form setting at certain intervals in above-mentioned reactive tank 1, the inner space of separating reactive tank.Thus, reactive tank is divided into the first space 10a, second space 10b and the 3rd space 10c.
Above-mentioned porous plate 3 is the direction along reactive tank 1 in reactive tank 1 inside, and airflow direction is endways arranges 4.The first space 10a inner and upper that porous plate is separated out arranges ozone spout 5, and second space 10b inner and upper arranges hydrogen peroxide spout 6, the three space 10c inner and upper nertralizer spout 7 is set.
According to diagram, each spout 5,6 and 7 arranges 4 with same level line respectively above respective reaction space 10a, 10b and 10c, in addition also can be according to the endways setting of the central point of reaction compartment 10a, 10b and 10c.The quantity of spout 5,6 and 7 can be adjusted according to the quality of the capacity of reactive tank 1 and the waste gas of processing.
Under the condition of above-mentioned porous plate 3 and spout 5,6,7, in reaction compartment 10a, the 10b that ozone treatment, hydrogen peroxide treatment and neutralisation treatment are separated out at porous plate 3 and 10c, independently carry out separately.Air-flow carries out chemical reaction under safety, uniform distributive condition, and the required chemical reaction of each reactions steps is more efficient.Thus, the handling property of exhuast gas desulfurization denitration is greatly improved.
Meanwhile, for reclaiming the sediment generating in ozone reaction and neutralization reaction process, i.e. anhydrous nitrogen N
2o
5and neutral salt NaHSO
4and NaNO
3, below the first reaction compartment 10a, i.e. reactive tank 1 below, the 3rd reaction compartment 10c below, reactive tank 1 below arranges comb 9 and the comb safety valve 9a with funnel function.
In above-mentioned neutralisation treatment process, generate the neutral salt of high additive value, these neutral salt are not absorbed by deduster, but directly reclaim by the comb that is arranged on the 3rd reaction compartment 10c bottom, neutral salt does not mix mutually with fine solid particle, has greatly improved thus the efficiency of recycling.
Fig. 3 is the sectional view of second embodiment of the invention treating apparatus 10 used, and particular content has been described above, and its structure is substantially identical with the first embodiment.Different is to be provided with Venturi scrubber 14.
Above-mentioned Venturi scrubber 14 is one of gas dust remover, makes gas after neutralisation treatment can't help blast pipe and discharges, but flow into flow tube.Improve flow velocity in flow tube throat.Meanwhile, the water under high pressure in throat (fresh water or seawater) separates the drop (particulate of water) and powder dust particle collision that form.This is the process of drop seizure powder dust particle.
Drop flows in not shown recovery separator-anticyclone device after catching powder dust particle, and air and drop separation are also purified.In this step, the air after purification flows out and finally enters atmosphere from the outlet of anticyclone device top, and the water that has caught dust flows out from the outlet of anticyclone device below.This is final purification step.
Above-mentioned Venturi scrubber 14 can be effective to remove pocket type and electronic precipitator cannot catch, and size is the hygroscopy powder dust particle of 1 μ m (micron).It is more efficient that this treating apparatus can make desulphurization denitration processing and the dedusting of waste gas thus.
Can use the reason of above-mentioned Venturi scrubber 14 and so on wet scrubber to be, the neutral salt producing in neutralisation treatment process is reclaimed by comb 9 after being deposited in the 3rd bottom, space.The multiple high-efficiency wet-type dust collector of removing in addition fine solid particle except Venturi scrubber 14 is available.
Fig. 4's
with
it is the porous plate 3 using on this treating apparatus 10.This strip has the hole 3a of certain thickness and certain intervals, can distribute safely, equably off-gas flows.Can select square, circular or other shapes according to the shape of reactive tank 1.
Most preferred scheme is: according to the direction of reactive tank 1, several porous plates 3 are set, on porous plate 3, the position of empty 3a reaches unanimously, can distribute safely, equably thus off-gas flows.
Fig. 5 is device 10 sectional views of third embodiment of the invention.Reactive tank 1 in the first embodiment and the second embodiment is divided into the first reactive tank 16 and the second reactive tank 17.Each reactive tank 16,17 use blast pipes 2 connect.Above the first reactive tank 16 is interior, ozone spout 5 and hydrogen peroxide spout 6 are set.
Meanwhile, the outlet in the second reactive tank 17 and porch arrange several (each on figure fill 3) porous plates 3 at certain intervals, thereby mark off reaction compartment 17a in the second reactive tank 17 central authorities.In above-mentioned reaction compartment inner and upper, nertralizer spout 7 is set, all the other facilities are identical with the first embodiment and the second embodiment.
In above-mentioned example, between ozone treatment and hydrogen peroxide treatment, do not establish porous plate 3, but jointly carry out in the first reactive tank.In the reaction compartment 17a of the second reactive tank 17 that in exhaust-gas treatment, most important neutralisation treatment marks off at porous plate 3, carry out.Also can obtain thus identical treatment effect.
In addition, on the second reactive tank 17 rear blast pipes 2, be provided with deduster as shown in the figure.This deduster can be the dry collector 8 using in the first embodiment, can be also the Venturi scrubber 14 using in the second embodiment.For reclaiming neutral salt, below corresponding the second reactive tank 17 of reaction compartment 17a, comb 9 is set.
Claims (6)
1. a marine exhaust desulfurization denitration method, comprising:
Filtration step (S1), removes contained dust in marine diesel engine combustion gas;
Ozone treatment step (S2), the waste gas complete to dedusting sprays ozone;
Hydrogen peroxide treatment step (S3), the waste gas complete to ozone treatment sprays hydrogen peroxide;
Neutralisation treatment step (S4), the waste gas complete to hydrogen peroxide treatment sprays nertralizer; And
Dust removal step (S5), removes contained fine solid particle in the complete waste gas of neutralisation treatment,
Wherein, in described neutralisation treatment step (S4), use the NaCl aqueous solution as contained H in nertralizer and waste gas
2sO
4composition and HNO
3composition reaction, is characterized in that: in described neutralisation treatment step (S4), and the NaHSO obtaining by reaction
4, NaNO
3be deposited in reaction tank bottom, reclaim by the comb that is arranged on reaction tank bottom.
2. marine exhaust desulfurization denitration method according to claim 1, it is characterized in that: the porous plate that distributes air-flow is set according to toxic emission direction, the inside of reactive tank is divided into 3 reaction compartments, in 3 spaces that ozone treatment step (S2), hydrogen peroxide treatment step (S3) and neutralisation treatment step (S4) are separated out at porous plate, independently carries out separately.
3. a marine exhaust desulphurization denitration treating apparatus, its emission-control equipment (10) mainly comprises: on the marine diesel engine blast pipe (2) extending, dust removal filter (4) and deduster (8) are set; Reactive tank (1) is set between described dust removal filter (4) and deduster (8) and processes waste gas; In described reactive tank (1), order is provided with the ozone spout (5) being connected with ozone supply device (11); The hydrogen peroxide spout (6) being connected with hydrogen peroxide feeder (12); The nertralizer spout (7) being connected with nertralizer feeder (13), on porous plate (3), there are multiple pores for distributing air-flow, in described reactive tank (1), form is at certain intervals separated into the first space (10a), second space (10b) and the 3rd space (10c) the inner space of reactive tank
The first space (10a) inner and upper arranges ozone spout (5), second space (10b) inner and upper arranges hydrogen peroxide spout (6), the 3rd space (10c) inner and upper arranges nertralizer spout (7)
It is characterized in that: described nertralizer feeder (13) is the feedway of the NaCl aqueous solution, the 3rd bottom, space (10c) arranges comb (9) and comb safety valve (9a).
4. marine exhaust desulphurization denitration treating apparatus according to claim 3, is characterized in that: described deduster (8) is connected with Venturi scrubber (14) by high-pressure water pipe (15).
5. a marine exhaust desulphurization denitration treating apparatus, its emission-control equipment (10) mainly comprises: on the marine diesel engine blast pipe (2) extending, dust removal filter (4) and deduster (8) are set; Reactive tank (1) is set between described dust removal filter (4) and deduster (8) and processes waste gas; In described reactive tank, order is provided with the ozone spout (5) being connected with ozone supply device (11); The hydrogen peroxide spout (6) being connected with hydrogen peroxide feeder (12); The nertralizer spout (7) being connected with nertralizer feeder (13),
Described reactive tank (1) is divided into the first reactive tank (16) and the second reactive tank (17), and first, second is blast pipe (2) connection for reactive tank, in the first reactive tank (16), top arranges ozone spout (5) and hydrogen peroxide spout (6), in the second reactive tank (17), central authorities are provided with the porous plate (3) of multiple holes, thereby central authorities mark off reaction compartment (17a) at the second reactive tank (17), in described reaction compartment (17a) inner and upper, nertralizer spout (7) is set, it is characterized in that: described nertralizer feeder (13) is the feedway of the NaCl aqueous solution, the second reaction compartment (17a) bottom of the second reactive tank (17) arranges comb (9) and comb safety valve (9a).
6. marine exhaust desulphurization denitration treating apparatus according to claim 5, is characterized in that: described deduster (8) is connected with Venturi scrubber (14) by high-pressure water pipe (15).
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|---|---|---|---|
| CN201010540886.0A CN102463015B (en) | 2010-11-11 | 2010-11-11 | Desulfurization and denitrification method and treatment device for marine exhaust gas |
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| US9387438B2 (en) | 2014-02-14 | 2016-07-12 | Tenneco Automotive Operating Company Inc. | Modular system for reduction of sulphur oxides in exhaust |
| CN104675480B (en) * | 2015-02-09 | 2018-02-16 | 王会文 | A kind of vehicle exhaust wet type pollution treatment device |
| CN104941412A (en) * | 2015-06-05 | 2015-09-30 | 北京中晶佳镁环境科技股份有限公司 | Flue gas desulphurization-denitration integrated device and method |
| CN104857835B (en) * | 2015-06-05 | 2016-08-17 | 北京中晶环境科技股份有限公司 | Flue gas integrated treatment unit and method |
| CN104941430B (en) * | 2015-06-05 | 2018-06-19 | 中晶环境科技股份有限公司 | Equipment for denitrifying flue gas and method |
| CN104941417A (en) * | 2015-06-05 | 2015-09-30 | 北京中晶佳镁环境科技股份有限公司 | Flue gas treatment device and method |
| CN104941431A (en) * | 2015-06-05 | 2015-09-30 | 北京中晶佳镁环境科技股份有限公司 | Desulphurization and denitration device and method |
| CN104941413A (en) * | 2015-06-05 | 2015-09-30 | 北京中晶佳镁环境科技股份有限公司 | Denitration device and method |
| CN107890740B (en) * | 2016-08-09 | 2019-09-27 | 蔡惠萍 | Furniture spray painting purification device |
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| US10940471B1 (en) | 2019-10-30 | 2021-03-09 | W. L. Gore & Associates, Inc. | Catalytic efficiency of flue gas filtration |
| US11071947B2 (en) | 2019-10-30 | 2021-07-27 | W. L. Gore & Associates, Inc. | Catalytic efficiency of flue gas filtration |
| CN112902266A (en) * | 2021-03-19 | 2021-06-04 | 陈荣富 | Multifunctional air purifier |
| EP4089266A1 (en) * | 2021-05-12 | 2022-11-16 | Alfa Laval Corporate AB | Exhaust gas cleaning system and method for cleaning exhaust gas and use of exhaust gas cleaning system |
| CN113813765B (en) * | 2021-10-19 | 2024-03-12 | 盐城海德能水处理环保工程有限公司 | Phenol-cyanogen wastewater deodorization system and deodorization method thereof |
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| US2010212A (en) * | 1931-09-11 | 1935-08-06 | Lcl Corp | Container car and container therefor |
| JPH0445513U (en) * | 1990-08-17 | 1992-04-17 | ||
| DE10054877A1 (en) * | 2000-11-06 | 2002-05-29 | Omg Ag & Co Kg | Exhaust gas cleaning system for the selective catalytic reduction of nitrogen oxides under lean exhaust gas conditions and methods for exhaust gas cleaning |
| US20040062697A1 (en) * | 2002-10-01 | 2004-04-01 | Airborne Pollution Control Inc. | Flue gas purification method |
| CN201291116Y (en) * | 2008-07-23 | 2009-08-19 | 覃水益 | Shock wave type high-efficiency desulfurization dust collector |
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