CN210097362U - Exhaust desulfurization horizontal washing tower of marine diesel engine - Google Patents
Exhaust desulfurization horizontal washing tower of marine diesel engine Download PDFInfo
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- CN210097362U CN210097362U CN201920549137.0U CN201920549137U CN210097362U CN 210097362 U CN210097362 U CN 210097362U CN 201920549137 U CN201920549137 U CN 201920549137U CN 210097362 U CN210097362 U CN 210097362U
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- 238000005406 washing Methods 0.000 title claims abstract description 54
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 22
- 230000023556 desulfurization Effects 0.000 title claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 93
- 238000004140 cleaning Methods 0.000 claims abstract description 25
- 238000010521 absorption reaction Methods 0.000 claims abstract description 23
- 239000003546 flue gas Substances 0.000 claims abstract description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000012423 maintenance Methods 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 238000005507 spraying Methods 0.000 claims abstract description 14
- 239000012528 membrane Substances 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000010791 quenching Methods 0.000 claims abstract description 8
- 230000000171 quenching effect Effects 0.000 claims abstract description 8
- 239000007921 spray Substances 0.000 claims abstract description 8
- 239000007789 gas Substances 0.000 claims description 18
- 238000005201 scrubbing Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 239000000945 filler Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 5
- 238000012856 packing Methods 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 10
- 230000002745 absorbent Effects 0.000 description 7
- 239000002250 absorbent Substances 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 229910052717 sulfur Inorganic materials 0.000 description 6
- 239000011593 sulfur Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000006386 neutralization reaction Methods 0.000 description 5
- 229910052815 sulfur oxide Inorganic materials 0.000 description 5
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 239000002585 base Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000003513 alkali Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000006276 transfer reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a horizontal washing tower for exhaust and desulfurization of a marine diesel engine, which comprises a tower body, wherein one side of the tower body is connected with a maintenance area, and the tower body is provided with a flue gas inlet, a flue gas outlet, a cleaning liquid inlet, an upper spraying layer cleaning liquid inlet and a lower spraying layer cleaning liquid inlet; the tower body comprises a demister cleaning zone, a chemical reaction absorption zone, a gas-liquid double-membrane contact zone, a quenching cooling zone and a washing liquid discharge zone, wherein the demister cleaning zone is a zone between a flue gas outlet and a washing liquid inlet; the chemical reaction absorption area is an area between an upper spraying layer washing liquid inlet and the bottom of the tower; the gas-liquid double-membrane contact area is positioned in the middle of the tower body; the quenching and cooling area is an area between an inlet of the lower spray layer washing liquid and the bottom of the tower; the washing liquid discharge area is located the tower body bottom. The utility model discloses a horizontal design, the occupation of land space is little, and stable in structure is reliable, and the butt-type structure area of contact of inside packing layer is bigger, and the gas-liquid contact is more abundant.
Description
Technical Field
The utility model relates to a marine diesel engine exhaust desulfurization application technology field especially relates to a marine diesel engine exhaust desulfurization horizontal scrubbing tower.
Background
The regulations governing sulfur emissions, enforced by the International Maritime Organization (IMO), will be implemented at 1/2020, which require global 0.5% sulfur limits to be achieved and 0.1% sulfur limits to be achieved by the Emission Control Area (ECA). The technology realizes the removal of the SOX by reverse contact of the diesel engine exhaust and alkaline washing liquid and chemical reaction absorption of acid-base neutralization. The washing tower is a key device for realizing the physical dissolution and chemical absorption of SOX in exhaust gas in washing liquid, the structural design of the washing tower has important influence on the distribution of gas-liquid two-phase flow plants, the distribution of temperature fields, the chemical reaction efficiency of acid-base neutralization and the like of diesel engine exhaust gas and washing liquid in the tower, and the washing tower is the most key device for realizing the exhaust gas desulfurization efficiency of the diesel engine.
At present, the design of the desulfurization washing tower for the ship is successfully developed and tested in Europe and America around 2008, and the desulfurization washing tower is formed by improvement after a large number of real ship tests. The publicly available technology for designing the marine desulfurization scrubbing tower in China mainly comes from the field of desulfurization systems of land-based boiler power stations, however, the difference between the marine diesel engine exhaust and the land-based boiler power stations is large due to the combustion fuel of the marine diesel engine exhaust, and the marine diesel engine exhaust is applied to the particularity of a ship body environment, so that the characteristic of the marine diesel engine exhaust needs to be considered in the design of the scrubbing tower.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model aims at providing a horizontal scrubbing tower that treatment effect is good, stable in structure is reliable, corrosion resisting property is good, be particularly useful for old ship transformation, the not enough condition in longitudinal arrangement space, is fit for marine diesel engine exhaust desulfurization.
The technical scheme is as follows: the utility model comprises a tower body, one side of the tower body is connected with a maintenance area, and the tower body is provided with a flue gas inlet, a flue gas outlet, a cleaning liquid inlet, an upper spraying layer cleaning liquid inlet and a lower spraying layer cleaning liquid inlet; the tower body comprises a demister cleaning zone, a chemical reaction absorption zone, a gas-liquid double-membrane contact zone, a quenching cooling zone and a washing liquid discharge zone, wherein the demister cleaning zone is a zone between a flue gas outlet and a washing liquid inlet; the chemical reaction absorption area is an area between an upper spraying layer washing liquid inlet and the bottom of the tower; the gas-liquid double-membrane contact area is positioned in the middle of the tower body; the quenching and cooling area is an area between an inlet of the lower spray layer washing liquid and the bottom of the tower; the washing liquid discharge area is located the tower body bottom.
The gas outlet be provided with the defroster, the defroster be network structure, the defroster has the greasy dirt to adhere to after long-time work, loss of pressure increase needs to detect the washing tower pressure differential change, sprays the washing in good time, guarantees that it is clean.
The upper part and the lower part of the gas-liquid double-membrane contact area are both of a grid type structure, metal filler is filled in the gas-liquid double-membrane contact area, and the metal filler increases the specific surface area of gas-liquid contact, so that the heat transfer and mass transfer of exhaust gas and washing liquid are more sufficient.
The washing liquid discharge area is provided with a circulating water outlet, a discharge port, a liquid level meter interface, a pH sensor interface and a density sensor interface.
The liquid level meter interface comprises a first liquid level meter interface and a second liquid level meter interface, wherein the first liquid level meter interface is positioned at the bottom of the tower body, and the second liquid level meter interface is positioned at the top of the tower body.
The tower body top be equipped with the lug, the tower body bottom adopts saddle support, stable in structure.
The maintenance area and the tower body are connected through flanges and used for equipment installation, maintenance and maintenance, and the top of the maintenance area is fixed with a hanging ring which is convenient to detach and hoist.
Has the advantages that: the utility model has the advantages of it is following:
1. the horizontal design is adopted, the occupied space is small, the structure is stable and reliable, the ship is particularly suitable for the reconstruction of an old ship under the condition of insufficient longitudinal arrangement space, the reconstruction workload is small, and the reality is feasible;
2. the horizontal structure is adopted, the contact area of the packing layer is larger compared with the vertical structure, the gas-liquid contact is more sufficient, a liquid film layer is formed, the atomized liquid is more uniformly distributed, the gas-liquid mixing is more sufficient, and the SOx removal effect can reach more than 98%;
3. the exhaust outlet is provided with the demister, the moisture carried in exhaust is collected and recovered, the emission of Particulate Matters (PM) in water vapor is reduced, the loss of moisture and corresponding supply are reduced, the emission of pollutants is reduced, the energy consumption is also reduced, the arrangement of a demister cleaning zone below the demister guarantees the cleanliness, and the pressure loss is reduced.
Drawings
Fig. 1 is a front view of the present invention;
fig. 2 is a top view of the present invention;
fig. 3 is a side view of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1 to 3, the utility model discloses a maintenance area and tower body two parts, the tower body left side is the maintenance area, and the middle flange joint that adopts, maintenance area and tower body constitute horizontal scrubbing tower jointly. The maintenance area is used for installing, maintaining and maintaining internal equipment, and the top of the maintenance area is welded with a hanging ring 14, so that the maintenance area is convenient to disassemble and hoist. The tower body adopts a barrel-shaped structure, and the surface of the tower body is provided with a flue gas inlet 1, a flue gas outlet 2, a cleaning liquid inlet 3, an upper spraying layer cleaning liquid inlet 4 and a lower spraying layer cleaning liquid inlet 5. As shown in fig. 1, a flue gas inlet 1 is arranged at the left side of the upper part of the tower body, a flue gas outlet 2 is connected to the right side of the top of the tower body, a cleaning liquid inlet 3 is arranged below the flue gas outlet 2, an upper spraying layer cleaning liquid inlet 4 is arranged on the left side below the cleaning liquid inlet 3, and a lower spraying layer cleaning liquid inlet 5 is arranged under the upper spraying layer cleaning liquid inlet 4.
The tower body is an equipment main body, and the interior of the tower body is divided into five regions of a demister cleaning region, a chemical reaction absorption region, a gas-liquid double-membrane contact region, a quenching and cooling region and a washing liquid discharge region. Lifting lugs 13 are fixed to the top of the tower body, the function of moving the equipment to a designated position is achieved, and a saddle-type support is adopted at the bottom of the tower, so that the structure is stable.
The defroster washs the district for the region between 2 and the washing liquid entry 3 of exhanst gas outlet, and exhanst gas outlet 2 is provided with defroster 11, as shown in fig. 3, and defroster 11 is network structure, and defroster 11 has the greasy dirt to adhere to after long-time work, and loss of pressure increase, consequently, need detect the washing tower pressure differential change, sprays the washing in good time, guarantees that it is clean.
The chemical reaction absorption area is an area between an upper spray layer washing liquid inlet 4 and the bottom of the tower, and the exhaust gas and the washing liquid are in contact mixing, chemical neutralization and absorption processes in the space.
The gas-liquid double-membrane contact zone is positioned in the middle of the tower body, as shown in fig. 3, the upper part and the lower part of the gas-liquid double-membrane contact zone are both of a grid structure, metal filler is filled in the gas-liquid double-membrane contact zone, the specific surface area of gas-liquid contact is increased by the metal filler, and therefore heat and mass transfer of exhaust gas and washing liquid is more sufficient.
The quenching and cooling area is an area between the lower spray layer washing liquid inlet 5 and the bottom of the tower, and exhaust gas enters the washing tower from the flue gas inlet 1 and then directly contacts with atomized washing liquid sprayed from a nozzle at the lower spray layer washing liquid inlet 5, so that the exhaust gas is rapidly cooled.
The washing liquid discharging area is located at the bottom of the tower body and is provided with a circulating water outlet 6, a discharge port 7, a liquid level meter interface, a pH sensor interface 9 and a density sensor interface 10, liquid in the tower is converged at the bottom and flows out of the circulating water outlet 6, the discharge port 7 is arranged because all liquid in the tower needs to be discharged due to long-time shutdown, and the discharge port 7 is located at the lowest point of equipment and can discharge all liquid. The level gauge interface comprises a first level gauge interface 8 and a second level gauge interface 12, wherein the first level gauge interface 8 is located at the bottom of the tower body, and the second level gauge interface 12 is located at the top of the tower body. The pH sensor is used for measuring the pH value of the washing liquid and controlling the washing efficiency and the flow of the drained washing waste liquid according to the pH value of the washing liquid, and the density sensor is used for measuring the density of the washing liquid and is convenient for monitoring by a control system. After the exhaust gas of the marine diesel engine passes through the washing tower with the structure, the purposes of exhaust gas cooling and SOx removal are achieved through the effects of exhaust gas cooling, diversion uniform distribution, acid-base neutralization reaction absorption and the like in the tower, meanwhile, a certain removal effect is achieved on Particulate Matters (PM) and oil stains in the exhaust gas, and the exhausted SOx meets the control requirement of IMO on the emission of the marine diesel engine.
The working principle is as follows:
the utility model adopts an absorption method to carry out washing and desulfurization. The absorption method is to use a proper liquid as an absorbent to make sulfur-containing waste gas and the absorbent contact with each other in a gas-liquid two-phase manner, so that sulfur dioxide in the waste gas and part of diesel engine combustion products (PM and the like) are absorbed in the absorbent to achieve the purpose of purifying the gas.
The absorption liquid is atomized and sprayed into the absorption tower through a nozzle, and is dispersed into fine liquid drops to cover the whole section of the absorption tower. The alkali liquor in the liquid drops contacts with the flue gas in the tower in a countercurrent way to generate mass transfer and absorption reaction, SO in the flue gas2、SO3And absorbing HCl and HF into the circulating liquid, and performing forced oxidation and neutralization reaction in the circulating tank.
The alkali liquor is used for treating sulfur-containing waste gas, and the flue gas also contains a large amount of CO2CO first generated when scrubbing gas with NaOH solution2The reaction with NaOH results in a decrease in pH of the absorption solution and a very low desulfurization efficiency. SO absorption occurs over time as the pH drops below 7.52The reaction of (1). Along with the main absorbent Na2SO3Is constantly generated of SO2The stripping efficiency is also continuously improved. When absorbing Na in the liquid2SO3All converted to NaHSO3At this point, the absorption reaction will not take place, at which point the pH drops to 4.5. But with SO2The pH value of the mixture is still continuously reduced, and the reason of the reduction of the pH value is only due to SO2Is caused by physical dissolution in the solution. Therefore, the absorption liquid effectively absorbs SO2The pH of (a) is in the range of 4.5 to 7.5. When the treatment with the absorbent is actually carried out, the pH of the absorbent is controlled within this range.
The desulfurization system adopts NaOH as an initial absorbent to absorb SO in the waste gas2The absorption reaction is shown as the formula (1-4). As the reaction is continuously carried out, NaHSO is finally obtained3Neutralizing the solution with NaOH to obtain NaHSO3Conversion to Na2SO3. The main part of the processThe secondary reaction is Na formation2SO4Oxidation reaction of (3).
SO2+2NaOH→Na2SO3(1)
Na2SO3+SO2+H2O→2NaHSO3(2)
NaHSO3+NaOH→Na2SO3+H2O (3)
2Na2SO3+O2→2Na2SO4(4)
In general, the washing efficiency and the flow rate of the waste washing liquid discharged are controlled according to the pH value of the washing liquid.
The main propelling power of a certain ship is a marine diesel engine with the rated power of 2205KW, the rated rotating speed of 169rpm, the sulfur content of fuel oil of 3.5 percent and the rated power exhaust flow of 15770kg/h, after desulfurization is carried out by using a horizontal desulfurization washing tower with the diameter of 1600mm and the length of 3100mm, the SOx removal effect is good, the efficiency can reach 98 percent, and the discharged SOx meets the control requirement of IMO on the discharge of the marine diesel engine.
Claims (7)
1. The marine diesel engine exhaust desulfurization horizontal washing tower comprises a tower body and is characterized in that one side of the tower body is connected with a maintenance area, and the tower body is provided with a flue gas inlet, a flue gas outlet, a cleaning liquid inlet, an upper spraying layer cleaning liquid inlet and a lower spraying layer cleaning liquid inlet; the tower body comprises a demister cleaning zone, a chemical reaction absorption zone, a gas-liquid double-membrane contact zone, a quenching cooling zone and a washing liquid discharge zone, wherein the demister cleaning zone is a zone between a flue gas outlet and a washing liquid inlet; the chemical reaction absorption area is an area between an upper spraying layer washing liquid inlet and the bottom of the tower; the gas-liquid double-membrane contact area is positioned in the middle of the tower body; the quenching and cooling area is an area between an inlet of the lower spray layer washing liquid and the bottom of the tower; the washing liquid discharge area is located the tower body bottom.
2. The horizontal scrubbing tower for the exhaust desulfurization of the marine diesel engine according to claim 1, wherein the flue gas outlet is provided with a demister, and the demister is in a net structure.
3. The horizontal scrubbing tower for exhaust desulfurization of marine diesel engine according to claim 1, wherein the upper and lower parts of said gas-liquid double-film contact zone are of grid structure, and the interior of said gas-liquid double-film contact zone is filled with metal filler.
4. The horizontal scrubbing tower for desulfurization of exhaust gas of marine diesel engine according to claim 1, wherein said scrubbing liquid discharge area is provided with a circulating water outlet, a discharge port, a level meter interface, a pH sensor interface and a density sensor interface.
5. The marine diesel engine horizontal scrubbing tower of claim 4, wherein said level gauge ports comprise a first level gauge port and a second level gauge port, wherein said first level gauge port is located at the bottom of the tower and said second level gauge port is located at the top of the tower.
6. The horizontal scrubbing tower for the exhaust desulfurization of marine diesel engines as defined in claim 1, wherein a lifting lug is arranged at the top of the tower body, and a saddle-type support is arranged at the bottom of the tower body.
7. The horizontal scrubbing tower for desulfurization of marine diesel engine exhaust according to claim 1, wherein the maintenance area is connected with the tower body by a flange, and a hanging ring is fixed on the top of the maintenance area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920549137.0U CN210097362U (en) | 2019-04-22 | 2019-04-22 | Exhaust desulfurization horizontal washing tower of marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920549137.0U CN210097362U (en) | 2019-04-22 | 2019-04-22 | Exhaust desulfurization horizontal washing tower of marine diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN210097362U true CN210097362U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920549137.0U Expired - Fee Related CN210097362U (en) | 2019-04-22 | 2019-04-22 | Exhaust desulfurization horizontal washing tower of marine diesel engine |
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| Country | Link |
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| CN (1) | CN210097362U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109876635A (en) * | 2019-04-22 | 2019-06-14 | 江苏科技大学 | Marine diesel exhaust gas desulfurization horizontal washing tower |
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2019
- 2019-04-22 CN CN201920549137.0U patent/CN210097362U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109876635A (en) * | 2019-04-22 | 2019-06-14 | 江苏科技大学 | Marine diesel exhaust gas desulfurization horizontal washing tower |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200221 |