CN109876635A - Marine diesel exhaust gas desulfurization horizontal washing tower - Google Patents
Marine diesel exhaust gas desulfurization horizontal washing tower Download PDFInfo
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- CN109876635A CN109876635A CN201910323396.6A CN201910323396A CN109876635A CN 109876635 A CN109876635 A CN 109876635A CN 201910323396 A CN201910323396 A CN 201910323396A CN 109876635 A CN109876635 A CN 109876635A
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Abstract
The invention discloses a kind of marine diesel exhaust gas desulfurization horizontal washing tower, including tower body, the tower body side connects maintenance area, and tower body is equipped with smoke inlet, exhanst gas outlet, filter washing water inlet, upper spraying layer cleaning solution entrance and lower spraying layer cleaning solution entrance；It include demister cleaning area, chemical reaction uptake zone, the double film contact zones of gas-liquid, chilling cooling area and cleaning solution discharge region, region of the demister cleaning area between exhanst gas outlet and filter washing water inlet in tower body；The chemical reaction uptake zone is upper spraying layer cleaning solution entrance to the region between tower bottom；The double film contact zones of the gas-liquid are located in the middle part of tower body；The chilling cooling area is lower spraying layer cleaning solution entrance to the region between tower bottom；The cleaning solution discharge region is located at tower body bottom.The present invention uses horizontal design, and space occupied is small, and stable structure is reliable, and the relatively vertical structure interface product of inner stuffing layer is bigger, and gas-liquid contact is more abundant.
Description
Technical field
The present invention relates to marine diesel exhaust gas desulfurization applied technical field more particularly to a kind of exhaust of marine diesel are de-
Sulphur horizontal washing tower.
Background technique
The limitation sulphur emissions relevant laws and regulations carried out by International Maritime Organization (IMO) in fact will be punctual real January 1 in the year two thousand twenty
It applies, which realizes that the whole world 0.5% limits sulphur, and emission control area (ECA) realizes 0.1% limit sulphur.Wherein vent scrub desulfurization
As the mainstream technology of marine diesel exhaust gas SOX post-processing, the technology is reverse by diesel exhaust gas and alkaline detergent solution
Contact, acid-base neutralization chemical reaction absorb and realize and remove SOX.And core equipment of the scrubbing tower as this technology, it is real
The crucial place of SOX physical dissolution and chemical absorbing in cleaning solution, structure of column scrubber are designed to diesel engine in tower in being now vented
Exhaust and the distribution of biphase gas and liquid flow factory, the distribution in temperature field, acid-base neutralization chemical reaction efficiency of cleaning solution etc. all have important
It influences, is the equipment for realizing diesel exhaust gas desulfuration efficiency most critical.
Currently, the design about desulfurization washing tower peculiar to vessel is American-European countries's development test success before and after 2008, and pass through
It is improved after a large amount of ship trial.The country can disclose the technology obtained to the design of desulfurization washing tower peculiar to vessel and be mostly derived from land
With boiler power station desulphurization system field, however marine diesel exhaust because its burn it is fuel used with stationary boiler power station difference compared with
Greatly, along with the particularity applied in hull environment, therefore emphasis consideration is needed to be arranged according to marine diesel when washing Deethanizer design
The characteristic of gas.
Summary of the invention
Goal of the invention: it is an object of the present invention to provide a kind of high treating effect, stable structure is reliable, corrosion resistance and good, outstanding
It is suitable for obsolete vessel transformation, it is longitudinally arranged the case where insufficient space, is suitble to the horizontal washing tower of marine diesel exhaust gas desulfurization.
Technical solution: the present invention includes tower body, and the tower body side connects maintenance area, tower body be equipped with smoke inlet,
Exhanst gas outlet, filter washing water inlet, upper spraying layer cleaning solution entrance and lower spraying layer cleaning solution entrance；It include that demister is clear in tower body
Wash area, chemical reaction uptake zone, the double film contact zones of gas-liquid, chilling cooling area and cleaning solution discharge region, the demister cleaning
Region of the area between exhanst gas outlet and filter washing water inlet；The chemical reaction uptake zone be upper spraying layer cleaning solution entrance extremely
Region between tower bottom；The double film contact zones of the gas-liquid are located in the middle part of tower body；The chilling cooling area is that lower spraying layer is washed
Liquid entrance is washed to the region between tower bottom；The cleaning solution discharge region is located at tower body bottom.
The exhanst gas outlet is provided with demister, and the demister is in reticular structure, and demister is working long hours
Afterwards, greasy dirt attachment is had, the pressure loss increases, and need to detect the variation of scrubbing tower pressure difference, carry out spray cleaning in due course, guarantees that it is clear
It is clean.
The upper and lower of the double film contact zones of the gas-liquid is all made of gridiron structure, and inside is full of metal packing, and metal packing increases
The specific surface area of gas-liquid contact is added, so that exhaust is more abundant with the heat and mass of cleaning solution.
The cleaning solution discharge region is equipped with circulating water outlet, bleed outlet, interface of the level gauge, pH sensor interface and density
Sensor interface.
The interface of the level gauge includes first liquid level gauge interface and second liquid level gauge interface, wherein first liquid level gauge connects
Mouth is located at tower body bottom, and second liquid level gauge interface is located at the top of tower body.
Lifting lug is equipped at the top of the tower body, tower body bottom uses saddle support, stable structure.
Flanged joint is used between the maintenance area and tower body, for using when equipment installation, maintenance, maintenance, is pushed up
Portion is fixed with hanging ring, easy to disassemble, lifting.
The utility model has the advantages that present invention has the advantage that
1, using horizontal design, space occupied is small, and stable structure is reliable, is especially suitable for that obsolete vessel is transformed, is longitudinally arranged sky
Between insufficient situation, retrofit work amount is small, practicable；
2, using horizontal type structure, the relatively vertical structure interface product of packing layer is bigger, and gas-liquid contact is more abundant, forms liquid
Film layer makes atomized liquid be more evenly distributed, and gas-liquid mixed is more abundant, to SOx removal effect up to 98% or more；
3., air exit be arranged demister, by the moisture accumulation carried in exhaust recycle, reduce particulate matter in steam
(PM) discharge, while reducing loss of moist and corresponding supply, the discharge of pollutant is reduced, energy consumption is also reduced, is removed
The setting of side defroster cleaning area under day with fog, guarantees its cleannes, reduces the pressure loss.
Detailed description of the invention
Fig. 1 is main view of the invention；
Fig. 2 is top view of the invention；
Fig. 3 is side view of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1 to Figure 3, the present invention includes maintenance area and tower body two parts, is maintenance area on the left of tower body, and centre uses
Flanged joint, maintenance area and tower body collectively constitute horizontal washing tower.Maintenance area when internal unit installation, maintenance, maintenance for making
With top is welded with hanging ring 14, easy to disassemble and lifting.Tower body uses barrel-like structure, and surface is equipped with smoke inlet 1, flue gas goes out
Mouth 2, filter washing water inlet 3, upper spraying layer cleaning solution entrance 4 and lower spraying layer cleaning solution entrance 5.As shown in Figure 1, tower body top
Leftward position is equipped with smoke inlet 1, and the right side at the top of tower body is connected with exhanst gas outlet 2, enters below exhanst gas outlet 2 equipped with cleaning solution
The left side of mouth 3,3 lower section of filter washing water inlet is equipped with upper spraying layer cleaning solution entrance 4, the underface of upper spraying layer cleaning solution entrance 4
Equipped with lower spraying layer cleaning solution entrance 5.
Tower body is equipment body, inside be divided into demister cleaning area, chemical reaction uptake zone, the double films contacts of gas-liquid
Area, chilling cooling area and the region of cleaning solution discharge region five.Lifting lug 13 is fixed at the top of tower body, play equipment is moved to it is specified
The effect of position, tower bottom use saddle support, stable structure.
Region of the demister cleaning area between exhanst gas outlet 2 and filter washing water inlet 3, exhanst gas outlet 2 are provided with demister
11, as shown in figure 3, demister 11 is in reticular structure, demister 11 has greasy dirt attachment, the pressure loss after working long hours
Increase, therefore, the variation of scrubbing tower pressure difference need to be detected, spray cleaning is carried out in due course, guarantee its cleaning.
Chemically reacting uptake zone is upper spraying layer cleaning solution entrance 4 to the region between tower bottom, and exhaust and cleaning solution are at this
Contact mixing is realized in a space, chemistry neutralizes the process absorbed.
The double film contact zones of gas-liquid are located in the middle part of tower body, as shown in figure 3, double the upper and lower of film contact zone of gas-liquid are all made of grating type
Structure, inside are full of metal packing, and metal packing increases the specific surface area of gas-liquid contact, so that the heat transfer of exhaust and cleaning solution
Mass transfer is more abundant.
Chilling cooling area is lower spraying layer cleaning solution entrance 5 to the region between tower bottom, and exhaust enters from smoke inlet 1 washes
After washing tower, the atomization cleaning solution sprayed with the nozzle at lower spraying layer cleaning solution entrance 5 is directly contacted, and is vented cooling rapidly.
Cleaning solution discharge region is located at tower body bottom, and cleaning solution discharge region is equipped with circulating water outlet 6, bleed outlet 7, liquidometer and connects
Mouthful, pH sensor interface 9 and density sensor interface 10, the liquid pools in tower flow out by circulating water outlet 6 in bottom, are arranged
Bleed outlet 7 is that shut down due to long-time need to be by all liq row, bleed outlet 7 be located at equipment minimum point in tower, can be by whole liquid
Body excludes.Interface of the level gauge includes first liquid level gauge interface 8 and second liquid level gauge interface 12, wherein 8, first liquid level gauge interface
In tower body bottom, second liquid level gauge interface 12 is located at the top of tower body.PH sensor is used to measure the pH value of cleaning solution, and according to washing
The scrub raffinate flow for washing liquid pH value to control detersive efficiency and drain, density sensor are used to measure the density of cleaning solution,
Convenient for control system monitoring.It is equal by exhaust cooling, water conservancy diversion in tower after the scrubbing tower that marine diesel exhaust passes through above structure
The effects of cloth, acid-base neutralization reaction absorb completes the purpose of exhaust cooling, SOx removing, while to particulate matter in exhaust (PM)
Also there is certain removing effect with greasy dirt, it is ensured that the SOx of discharge meets the control requirement that IMO discharges boat diesel engine.
Working principle:
The present invention carries out washing desulphurization using absorption process.Absorption process refers to using liquid appropriate as absorbent, makes to contain
Sulphur exhaust gas carries out gas-liquid two-phase with absorbent and contacts, and the sulfur dioxide and part diesel combustion product (PM etc.) in exhaust gas are inhaled
It closes in absorbent, achievees the purpose that purification gas.
Absorbing liquid sprays into absorption tower by nozzle atomization, is dispersed into tiny drop and covers the entire section on absorption tower.
Lye in these drops is contacted with flue gas adverse current in tower, and mass transfer and absorbing reaction, the SO in flue gas occurs2、SO3And HCl, HF
It is rapidly absorbed into circulation fluid, carries out forcing oxidation and neutralization reaction in circulatory pool.
Base extraction sulphur-containing exhaust gas, due to also containing a large amount of CO in flue gas2, when with NaOH solution washing gas, first
The CO of generation2With reacting for NaOH, the reduction of absorption liquid pH is resulted in, and desulfuration efficiency is very low.Extension at any time, pH are down to
When 7.5 or less, occur to absorb SO2Reaction.With main absorber Na2SO3Be continuously generated, SO2Eliminating efficiency also constantly mention
It is high.As the Na in absorbing liquid2SO3All it is transformed into NaHSO3When, absorbing reaction will no longer occur, and pH value is down to 4.5 at this time.But
With SO2Be passed through, pH value continues to decline, and the decrease reason of pH value is only because SO at this time2Physical dissolution has been carried out in the solution
It is caused.Therefore, absorbing liquid effectively absorbs SO2PH range be 4.5~7.5.When reality is handled with absorbing liquid, absorbing liquid
PH value should control within this range.
Desulphurization system makees the SO in initial absorption agent absorption exhaust gas using NaOH2, shown in absorbing reaction such as formula (1~4).
It is constantly carried out with reaction, will eventually get NaHSO3Solution is neutralized with NaOH, makes NaHSO3It is changed into Na2SO3.The master of the process
Side reaction is wanted to generate Na2SO4Oxidation reaction.
SO2+2NaOH→Na2SO3 (1)
Na2SO3+SO2+H2O→2NaHSO3 (2)
NaHSO3+NaOH→Na2SO3+H2O (3)
2Na2SO3+O2→2Na2SO4 (4)
Under normal circumstances, the scrub raffinate flow that detersive efficiency is controlled according to cleaning solution pH value and is drained.
It is rated power is 2205KW that certain ship, which promotes mainly power, rated speed 169rpm, and fuel oil sulfur content 3.5% is specified
The marine diesel of power extraction flow 15770kg/h has used the horizontal desulfurization that diameter 1600mm length is 3100mm to wash
After tower desulfurization, SOx removal effect is good, and for efficiency up to 98%, the SOx of discharge meets the control that IMO discharges boat diesel engine
It is required that.
Claims (7)
1. a kind of marine diesel exhaust gas desulfurization horizontal washing tower, including tower body, which is characterized in that the tower body side connection
Maintenance area, tower body are equipped with smoke inlet, exhanst gas outlet, filter washing water inlet, upper spraying layer cleaning solution entrance and lower spraying layer and wash
Wash liquid entrance；Include demister cleaning area in tower body, chemically react uptake zone, gas-liquid double film contact zone, chilling cooling areas and wash
Wash liquid discharge region, region of the demister cleaning area between exhanst gas outlet and filter washing water inlet；The chemical reaction
Uptake zone is upper spraying layer cleaning solution entrance to the region between tower bottom；The double film contact zones of the gas-liquid are located in the middle part of tower body；
The chilling cooling area is lower spraying layer cleaning solution entrance to the region between tower bottom；The cleaning solution discharge region is located at tower
Body bottom.
2. marine diesel exhaust gas desulfurization horizontal washing tower according to claim 1, which is characterized in that the flue gas goes out
Mouth is provided with demister, and the demister is in reticular structure.
3. marine diesel exhaust gas desulfurization horizontal washing tower according to claim 1, which is characterized in that the double films of the gas-liquid
The upper and lower of contact zone is all made of gridiron structure, and inside is full of metal packing.
4. marine diesel exhaust gas desulfurization horizontal washing tower according to claim 1, which is characterized in that the cleaning solution
Discharge region is equipped with circulating water outlet, bleed outlet, interface of the level gauge, pH sensor interface and density sensor interface.
5. marine diesel exhaust gas desulfurization horizontal washing tower according to claim 4, which is characterized in that the liquidometer
Interface includes first liquid level gauge interface and second liquid level gauge interface, wherein first liquid level gauge interface is located at tower body bottom, the second liquid
Position meter interface is located at the top of tower body.
6. marine diesel exhaust gas desulfurization horizontal washing tower according to claim 1, which is characterized in that the tower body top
Portion is equipped with lifting lug, and tower body bottom uses saddle support.
7. marine diesel exhaust gas desulfurization horizontal washing tower according to claim 1, which is characterized in that the maintenance area
Flanged joint is used between tower body, top is fixed with hanging ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910323396.6A CN109876635A (en) | 2019-04-22 | 2019-04-22 | Marine diesel exhaust gas desulfurization horizontal washing tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910323396.6A CN109876635A (en) | 2019-04-22 | 2019-04-22 | Marine diesel exhaust gas desulfurization horizontal washing tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109876635A true CN109876635A (en) | 2019-06-14 |
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ID=66938026
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910323396.6A Pending CN109876635A (en) | 2019-04-22 | 2019-04-22 | Marine diesel exhaust gas desulfurization horizontal washing tower |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009089673A1 (en) * | 2008-01-18 | 2009-07-23 | Beijing Bootes Electric Power Sci-Tech Co., Ltd. | Multistage spray column for fuel gas desulfurization |
| CN104324593A (en) * | 2014-10-22 | 2015-02-04 | 哈尔滨工程大学 | Ship waste gas double-loop washing and desulfurization device combining seawater and fresh water |
| CN108392970A (en) * | 2018-05-08 | 2018-08-14 | 威海普益船舶环保科技有限公司 | Exhaust gas scrubber and sea transport ship |
| CN109499298A (en) * | 2019-01-14 | 2019-03-22 | 苏州万鸿环保科技有限公司 | Marine diesel exhaust gas desulfurization I type desulfurizing tower |
| CN210097362U (en) * | 2019-04-22 | 2020-02-21 | 江苏科技大学 | Exhaust desulfurization horizontal washing tower of marine diesel engine |
-
2019
- 2019-04-22 CN CN201910323396.6A patent/CN109876635A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009089673A1 (en) * | 2008-01-18 | 2009-07-23 | Beijing Bootes Electric Power Sci-Tech Co., Ltd. | Multistage spray column for fuel gas desulfurization |
| CN104324593A (en) * | 2014-10-22 | 2015-02-04 | 哈尔滨工程大学 | Ship waste gas double-loop washing and desulfurization device combining seawater and fresh water |
| CN108392970A (en) * | 2018-05-08 | 2018-08-14 | 威海普益船舶环保科技有限公司 | Exhaust gas scrubber and sea transport ship |
| CN109499298A (en) * | 2019-01-14 | 2019-03-22 | 苏州万鸿环保科技有限公司 | Marine diesel exhaust gas desulfurization I type desulfurizing tower |
| CN210097362U (en) * | 2019-04-22 | 2020-02-21 | 江苏科技大学 | Exhaust desulfurization horizontal washing tower of marine diesel engine |
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