KR101940604B1 - Wet Scrubber for Ship and Absorption Tower with Complex type Washwater Spray System - Google Patents

Abstract

The present invention relates to a wet scrubber system for a ship and, more specifically, relates to a wet scrubber for a ship and an absorption tower with a complex type wash water spray system having the same, wherein the wet scrubber system for a ship comprises: an absorption tower; a first filling material unit and a second filling material unit; a supply line; and an inflow prevention unit. The supply line is formed by being divided into a first spray nozzle module, a second spray nozzle module, and a third spray nozzle module. Therefore, sulfur oxides contained in flue gas can be effectively absorbed and removed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet scrubber for ships,

The present invention relates to a wet scrubber system for ships, in which a flue gas sucked into a suction port at the lower end of an absorption tower is subjected to a quenching process, passes through a first packing part and a second packing part, In order to efficiently absorb and remove the sulfur compounds contained in the flue gas, a counter-current method of spraying the spraying method of the washing water in the upper space of the second filler part in a direction opposite to the flow direction of the flue gas, And a co-current system in which the liquid is sprayed in the same direction as the flow direction of the flue gas, which is the reverse direction of gravity.

In recent years, problems such as environmental pollution caused by exhaust gas discharged from a ship have been caused, and attention has been focused on an apparatus or a method for treating the same.

The toxic substances contained in the flue gas discharged from ships are not only harmful to the human body but also cause environmental pollution if they are discharged to the atmosphere without filtration treatment. Especially, sulfur compounds (sulfur oxides; Sulfur (S) oxides are collectively called, but mainly SO 2 (sulfur dioxide) and SO 3 (sulfur trioxide) are both generated when fuels containing sulfur or sulfur are burned, but in general there is a large amount of SO 2 in the exhaust gas. It must be removed.

On the other hand, the International Maritime Organization (IMO) limits the fuel sulfur content of ships by MARPOL (Marine Pollution Treaty), and since 2015, all emission control areas (ECA, Emission Control Area ) Sulfur-containing fuel is regulated to use less than 0.1% in the sea area.

In addition, for vessels using sulfur-containing fuels exceeding 0.1% due to problems such as fuel cost, the installation of sulfur compound reduction equipment is legally obligatory from 2015. That is, a desulfurization process is required to lower the content of sulfur compounds contained in the flue gas to below a permissible concentration, and it is mandatory to discharge only the flue gas that has undergone such a process to the atmosphere.

Accordingly, various types of flue gas treating apparatus for desulfurizing the ship flue gas and discharging it to the atmosphere are installed in the flue gas line of the ship.

A wet scrubber system for marine vessels is being used to treat such flue gas.

Patent Document 1 relates to a wet scrubber system for ships in which seawater as a cleaning water is sprayed to a flue gas containing a sulfur compound to dissolve sulfur compounds contained in the flue gas and then absorb and remove the sulfur compounds.

The wet scrubber system for marine includes an absorber for absorbing contaminants of flue gas by spraying washing water, a washing water treatment system for treating washing water discharged after absorbing contaminants, And a control system that monitors and controls the functions.

Among the above constructions, the absorption tower is a core device of the wet scrubber system. In particular, the absorption tower is installed in the absorption tower to absorb the sulfur compounds of the flue gas into the washing water sprayed to the filler, In the case where the filler is added in multiple stages, a method of spraying the washing water directly into the flue gas in a space between the filler parts to absorb and remove sulfur compounds of the flue gas is used.

Therefore, in order to effectively remove the sulfur compounds contained in the flue gas of the main engine, the generator and the boiler sucked into the absorption tower, in parallel with the method of using the filler having high absorption efficiency, the flue gas and the washing water An improved cleaning water injection method is needed to further increase the contact time and contact opportunities of the cleaning water.

KR 10-1804418 B1

In order to solve the above-described problems, the present invention is applied to a new cleansing water jetting system that injects cleansing water in both the upper and lower directions by arranging the cleansing water spraying nozzle module in the upper part and the lower part in the upper space of the second filler part . By this, the washing water injected in the downward direction from the upper nozzle, the washing water sprayed upward in the direction opposite to the gravity direction from the lower nozzle, and the gravity after spraying, or the lower part of the gas- The turbulent folw state is created by crossing or intersecting the washing water, and the opportunity for the flue gas and the washing water to come into contact with each other is greatly increased. Based on this, the efficiency of absorption and elimination of sulfur compounds contained in the flue gas Can be improved. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a wet scrubber for a marine vessel having improved efficiency of removing sulfur compounds contained in marine flue gas, and an absorption tower internal complex cleaning water injection system including the same.

In order to attain the above object, the present invention provides an exhaust gas purifying apparatus, comprising: a lower portion provided with a suction port for sucking a flue gas; An absorption tower having an upper portion and a space for absorbing and removing sulfur compounds therein; A first filler part and a second filler part installed in the absorption tower at an upper / lower interval so as to sequentially absorb sulfur compounds contained in the flue gas passing through the absorption tower; A supply line including a plurality of injection nozzles and a supply pump connected to the absorber so as to supply / spray clean water into the absorber; And an inflow prevention part formed in the interior of the absorber and spaced apart from the upper part of the suction port, the inflow prevention part being formed in a conical shape whose center is inclined upwardly to prevent inflow of the washing water into the suction port, A first injection nozzle module having a plurality of injection nozzles connected to a pipe disposed at an upper portion and spraying washing water upward toward the second filling material portion; A second injection nozzle module having a plurality of injection nozzles connected to upper and lower two rows of piping located at an upper portion close to the second filler portion and spraying wash water upward toward the gas-liquid separation device; A third injection nozzle module having a plurality of injection nozzles connected to a pipe located above the second filler portion and spraying downward toward the second filler portion; And a cooling spray nozzle module having a plurality of spray nozzles connected to piping disposed at a lower end of the inflow preventing portion and spraying quenching rinse water upward to cool the flue gas sucked into the absorption tower The present invention provides a wet scrubber for a ship and an absorption tower internal complex cleaning water injection system including the same.

The apparatus may further include a gas-liquid separating device for separating the gas and the liquid by centrifugal force between the discharge port and the third spray nozzle module to induce rotation in a linear gas flow and discharge only the gas to the discharge port. do.

In the meantime, a drain port is provided at a lower end of the absorption tower to discharge the washing water injected by the injection nozzle module to the outside of the absorption tower after the sulfur compounds contained in the flue gas are absorbed and removed.

According to the present invention configured as described above, a mixed-type rinse-water injection system is applied in the upper space of the second filler unit located on the uppermost layer of the absorption tower, whereby the contact time and contact opportunity between the flue gas and the rinse- It is possible to effectively absorb and remove the sulfur compounds contained in the flue gas of the main engine, the generator, and the boiler, which are sucked into the absorption tower.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a wet scrubber for a ship according to the present invention and a composite-type washing water injection system in an absorption tower including the same.
FIG. 2 is an enlarged view showing that the washing water injected upward and downward in the upper space of the second filling material portion by the combined-type washing water injection system according to the present invention is in a turbulent state while being hit or crossed with each other.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.

The present invention relates to a wet scrubber for a ship and an absorption tower internal mixed water injection system including the wet scrubber for spraying clean water or seawater into a flue gas to dissolve sulfur compounds contained in the flue gas in droplets, And then absorbing and removing it.

Therefore, it is the ultimate purpose of the ship scrubber system and the absorption tower design to enhance the efficiency of removing the sulfur compounds from the absorption tower. Therefore, the absorption tower is provided with a packing, and the washing water (5 ) And the flue gas flowing into the filler material from the bottom of the filler material are brought into contact with each other so that the contact time and the contact distance between the flushing water 5 and the flue gas are increased.

In the present invention, the filling material is divided into two stages. The separation and installation method of the filling material can increase the efficiency of absorbing the sulfur compounds of the washing water 5 by spraying the fresh washing water 5 in each step. In each step, the washing step of the spray method and the filling step And the cleaning step of the packing method is mixed and applied, it is possible to more effectively remove the sulfur compounds.

Accordingly, in the present invention, a suction port 101 through which a flue gas is sucked is provided at a lower portion thereof, a pollutant contained in the flue gas is absorbed, and then an exhaust port 102 Is provided on the upper part of the absorption tower 100 and a space in which the cleaning water injection nozzle module and the filling material are installed is provided.

In addition, the filler material may include a first filler portion 140a which is installed at an upper / lower interval in the absorption tower 100 and sequentially absorbs sulfur compounds contained in the flue gas passing through the absorption tower 100 And a second filler portion 140b.

A plurality of injection nozzles 122 and a supply pump 123 are connected to the piping in the absorption tower 100 to supply / spray the cleansing water 5 into the absorption tower 100 A supply line 120 is provided.

The inside of the absorption tower 100 and the upper portion of the suction port 101 are provided with a conical inflow prevention part 110 whose center is inclined upward to prevent the washing water 5 from flowing into the suction port 101, Respectively.

The supply line 120 includes a plurality of injection nozzles 122 connected to piping located above the first filler 140a and spraying the wash water 5 upward toward the second filler 140b, A first injection nozzle module 120a having a plurality of nozzles; A second injection nozzle module 140 having a plurality of injection nozzles 122 connected to a pipe located at an upper portion close to the second filler portion 140b and spraying the washing water 5 upward toward the gas- (120b); A third injection nozzle module having a spray nozzle 122 connected to a piping located at an upper portion spaced apart from the second filler 140b and spraying the washing water 5 downward toward the second filler portion 140b 120c.
At the lower end of the inflow prevention part 110, the supply line 120 is connected to the piping, and the washing water 5 is sprayed toward the first filling part 140a to cool the flue gas sucked into the absorption tower And a plurality of injection nozzles 122 for cooling the plurality of nozzles.
Meanwhile, between the discharge port 102 and the third spray nozzle module 120c, the gas is separated from the liquid using a centrifugal force by inducing rotation in a linear gas flow, and only the gas is discharged to the discharge port 102 And a separating device 150.
The washing water 5 sprayed by the spray nozzle 122 absorbs and removes the sulfur compounds contained in the flue gas, and then the drain hole 103 discharged to the outside is installed on one side of the lower end of the absorption tower 100 .

Particularly, the step of injecting the washing water 5 in the space above the second filler part 140b according to the present invention is a final washing water injection step for absorbing and removing sulfur compounds before the flue gas is discharged to the outside of the absorption tower, Which directly affects the absorption and removal efficiency of the sulfur compounds in the entire absorption tower 100.

Accordingly, in the present invention, a combined-type rinse solution injection method is designed and applied so as to maximize the removal efficiency of sulfur compounds in the space above the second filler portion 140b.

In detail, the second injection nozzle module 120b is installed at the upper part near the second filler part, the third injection nozzle module 120c is installed at the lower part of the gas-liquid separation device, and the second injection nozzle module 120b The third spray nozzle module 120c injects the washing water 5 in a direction opposite to the flowing direction of the flue gas, that is, the counterflow (Count The cleaning water 5 is sprayed in the -current manner.
In addition, the washing water sprayed upward by the parallel flow method is returned to the lower end of the gas-liquid separator by the gravity force.

As described above, the washing water flowing in the upper and lower parts is jumped or crossed with each other in the inner space, and the shape of the washing water flow is changed to the turbulent flow state.

As a result, the flue gas flowing to the upper portion passes through the cleansing water in the turbulent state, and the contact time with the cleansing water and the chance of contact with the flushing gas are greatly increased. As a result, the absorption and removal efficiency of the sulfur compound can be increased.

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By applying the present invention configured as described above, the possibility of contact between the flue gas and the washing water can be greatly increased in the upper space of the second filler portion 140b located on the uppermost layer of the absorption tower 100, The sulfur compounds contained in the flue gas of the main engine, the generator, and the boiler, which are sucked in, can be efficiently absorbed and removed.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor of the present invention appropriately uses the concept of the term to describe its own invention in the best way It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the configurations shown in the drawings and the embodiments described herein are merely the most preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention. Therefore, It should be understood that various equivalents and modifications are possible.

5: Washing water
100: Absorption tower
101: inlet
102:
103: Sewer
110:
120: Supply line
120a: a first injection nozzle module
120b: second injection nozzle module
120c: third injection nozzle module
120d: Cooling nozzle nozzle module
122: injection nozzle
123: Feed pump
140a: first filler portion
140b: the second filler part
150: gas-liquid separator

Claims (4)

A suction port 101 for sucking the flue gas is provided at a lower portion thereof and an exhaust port 102 for discharging the flue gas into which the sulfur compound absorbed and contained in the flue gas is discharged is provided at an upper portion thereof, )and;
A first filler portion 140a and a second filler portion 140b are installed in the absorber 100 so as to sequentially absorb sulfur oxides contained in the flue gas passing through the absorber 100, (140b);
And a supply pump 123 connected to a pipe inside the absorption tower 100 and including a plurality of injection nozzles 122 and a supply pump 123 for supplying / spraying the cleansing water 5 into the absorption tower 100, (120);
And an inflow prevention part (120) formed at an upper portion of the absorption tower (100) and above the suction port (101) and formed in a conical shape having an upwardly inclined center to prevent the inflow of the washing water (5) (110);
And a gas-liquid separator (150) provided below the discharge port (102) for separating the gas and the liquid by using a centrifugal force to induce rotation in a linear gas flow and discharge only the gas to the discharge port (102)
The supply line (120)
A first injection nozzle module 120a having a plurality of injection nozzles 122 connected to a pipe located at an upper portion of the first filler portion 140a and spraying the washing water 5 toward the second filler portion 140b, )and;
A second injection nozzle module (not shown) having a plurality of injection nozzles 122 connected to the piping located above the second filler portion 140b and spraying the washing water 5 upward toward the gas-liquid separator 150 120b;
The washing water 5 is sprayed to the lower portion of the second injection nozzle unit 120b toward the second filler member 140b by being connected to a pipe located above the second filling member 140b, And a third injection nozzle module 120c having a plurality of injection nozzles 122,
The washing water 5 is sprayed to the flue gas through the second spray nozzle module 120b in a co-current manner and at the same time, the flushing gas is supplied to the flue gas through the third spray nozzle module 120c The washing water injected in the upward / downward direction jumps or intersects with each other in the internal space, and the flow state changes into a turbulent flow state. In this case, The contact time and the contact distance between the flue gas passing through the flue gas and the washing water passing through the flushing water are greatly increased and the absorption and removal of sulfur compounds are increased on the basis thereof And a combined scrubbing water injection system in an absorption tower including the scrubber.
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