JP2020525273A - Exhaust gas treatment system - Google Patents

Abstract

According to one embodiment of the present invention, in the exhaust gas treatment system of the present invention, exhaust gas generated by combustion flows in, and a cleaning liquid is injected into the exhaust gas to remove harmful substances in the exhaust gas. The device, a transfer pipe that transfers exhaust gas from a combustion device that generates exhaust gas by combustion to the exhaust gas treatment device, a blower that causes air to flow, and air that has flowed by the blower. It is provided with an air supply unit having a ventilation unit that supplies the exhaust gas treatment device when the exhaust gas treatment device is not in operation and discharges the exhaust gas remaining in the exhaust gas treatment device. [Selection diagram] Fig. 1

Description

TECHNICAL FIELD The present invention relates to an exhaust gas treatment system, and more specifically, an exhaust gas treatment apparatus that removes harmful substances in exhaust gas by injecting a cleaning liquid into the exhaust gas by inflowing the exhaust gas generated by combustion, A transfer pipe that transfers the exhaust gas from the combustion device that generates the exhaust gas to the exhaust gas treatment device, a blower unit that causes a flow of air, and a flow generation by the blower unit when the exhaust gas treatment device is not operating The air supply unit having a ventilation unit for supplying the exhausted air to the exhaust gas treatment device and discharging the remaining exhaust gas, forcibly discharging the residual exhaust gas when the exhaust gas treatment device is not operating, and The present invention relates to an exhaust gas treatment system, which is characterized by preventing corrosion due to the above.

Most modern ships are equipped with an engine and a boiler for power and heating. Fuel must be burned in order to drive the engine and the boiler, but the exhaust gas generated in the combustion process includes sulfate (SOx), nitrogen oxide (NOx), PM (Particular Matter, particulate matter). ) And other harmful substances are included.

Sulfates and nitrogen oxides may act on the mucous membranes of the human body to cause respiratory diseases, and are also pollutants designated by the International Cancer Institute under the World Health Organization (WHO) as first-class carcinogens. Further, if the SOx and NOx are released into the air as they are, they react with moisture (H ₂ O) in the atmosphere to form sulfuric acid (H ₂ SO ₄ ) and nitric acid (NHO ₃ ), respectively. It can be a cause.

PM is in the form of small particles that are compared to gaseous pollutants, and if PM in the exhaust gas is released into the atmosphere as it is, it causes visibility problems that reduce the visible distance, or fine particles cause the lungs to fall. It may enter the human body through the respiratory tract and cause various diseases. Recently, fine dust, which has become a problem in Japan, is also caused by the PM, and can be regarded as a main cause of air pollution.

Here, the International Maritime Organization (IMO) sets an emission control area (ECA) to limit the emission of harmful substances in the relevant sea area. In particular, the Sulfate Emission Control Area (SECA) defines a wider range than the ECA that also regulates other harmful substances such as NOx and applies strong sanctions.

Moreover, from January 1, 2015, regulations were further tightened to limit the sulfur content in fuel that causes environmental pollution to all ships passing the SECA to 0.1% (IMO 184 (59). )). The SECA has been stipulated to be expanded from the existing Baltic Sea and North Sea regions to the North American region through the revision of the Marine Pollution Control Agreement in August 2011. From April 1, 2016, the sea near China will also be designated, and so on. Sulphate management will be a more important prospect as it should be expanded.

In addition, a bill to reduce the SOx content in exhaust gas to 3.5% or less in the world waters other than the ECA to 0.5% at the IMO General Assembly held on October 28, 2016 However, the need for sulphate management is increasing irrespective of the region where it is scheduled to be implemented from 2020.

In order to comply with such international regulations, a scrubber that reduces exhaust gas sulfate is used. Performing the exhaust gas treatment process using a scrubber is economically advantageous because even an inexpensive fuel having a relatively high sulfur content can meet the above regulations and prevent environmental pollution. The scrubber ionizes SOx with a cleaning liquid, and seawater (Sea Water) having a pH of around 8.3 or fresh water containing an alkaline additive is used as a cleaning liquid to neutralize the ionized sulfate. Further, the particulate matter can be prevented from being released into the atmosphere by aggregating and discharging the particulate matter together with the cleaning liquid.

The scrubber does not always operate, and its operation may be interrupted depending on the operating conditions of a combustion device such as an engine or a boiler or the need to maintain the scrubber itself. When the operation of the scrubber is interrupted as described above, if exhaust gas, moisture, etc. remain in the scrubber, corrosion of the shutoff device such as the scrubber or damper valve may progress. In order to prevent such corrosion, it is necessary to forcibly ventilate the residual exhaust gas inside and dry the moisture when the scrubber is not operating. However, at present, there is no efficient technique for forced ventilation of residual exhaust gas and drying of moisture inside the scrubber.

U.S. registered patent publication US 9,272,241, "COMBINED CLEANING SYSTEM AND METHOD FOR REDUCTION OF SOX AND NOX IN EXHAUST GASES FROM A COMBUSTION ENGINE", 2016.03.01. Register Korean Patent Registration No. 10-1461255 "Ceiling air damper for preventing backflow of exhaust gas", 2014.11.06. Register

The present invention is to solve the above-mentioned problems of the prior art,

It is an object of the present invention to provide an exhaust gas treatment system that supplies air to the inside of the exhaust gas treatment device and discharges the remaining exhaust gas when the exhaust gas treatment device is not operating.

Another object of the present invention is to provide an exhaust gas treatment system having an improved corrosion prevention function by ventilating the exhaust gas treatment device and drying moisture.

Still another object of the present invention is to supply an air blower for causing a flow of air, and the air flowed by the air blower to the exhaust gas treatment device when the exhaust gas treatment device is not operating, To provide an exhaust gas treatment system in which ventilation of the exhaust gas treatment device and drying of moisture are efficiently performed by an air supply unit having a ventilation unit for discharging the exhaust gas remaining in the exhaust gas treatment device. is there.

Still another object of the present invention is to provide the exhaust gas treatment device with the transfer pipe shutoff means for shutting off the transport pipe for transferring the exhaust gas to the exhaust gas treatment device when the exhaust gas treatment device is not in operation. It is an object of the present invention to provide an exhaust gas treatment system in which generated air is efficiently guided to the exhaust gas treatment device.

Still another object of the present invention is that the transfer pipe blocking means comprises a transfer pipe damper valve that receives air in a closed state and blocks an exhaust gas flow path in the transfer pipe, and the air supply unit is Provided is an exhaust gas treatment system having a high efficiency of air supply and utilization, further comprising a transfer pipe sealing part for supplying air generated by a blower part for sealing of the transfer pipe damper valve. Especially.

Still another object of the present invention is to provide a bypass pipe for bypassing the exhaust gas when the exhaust gas treatment device is not in operation, and a bypass pipe for allowing the exhaust gas to proceed to the transfer pipe when the exhaust gas treatment device is in operation. Another object of the present invention is to provide an exhaust gas treatment system that further includes a bypass pipe cutoff unit that cuts off the exhaust gas, and that efficiently bypasses the exhaust gas.

Still another object of the present invention is that the bypass pipe cutoff means is a bypass pipe damper valve installed in the bypass pipe and receiving sealing air in a closed state to cut off an exhaust gas flow passage in the bypass pipe. The air supply unit further includes a bypass pipe sealing unit that supplies air generated by the blower unit for sealing the transfer pipe damper valve, and exhaust gas with high efficiency of air supply and utilization. To provide a processing system.

Still another object of the present invention is to remove the harmful gas remaining in a gas state in the cleaning liquid discharged from the exhaust gas processing apparatus by being connected to the exhaust gas processing apparatus to remove the harmful gas in a gaseous state. Further comprising a harmful gas removing means for discharging the cleaning liquid, wherein the air supply part supplies the harmful gas removing means with air generated by the blower part to induce a reaction with the harmful gas. The present invention further provides an exhaust gas treatment system that minimizes the emission of harmful substances.

The present invention is embodied by an embodiment having the following configuration in order to achieve the above object.

According to an embodiment of the present invention, an exhaust gas treatment system of the present invention is an exhaust gas treatment system in which exhaust gas produced by combustion flows in and a cleaning liquid is injected into the exhaust gas to remove harmful substances in the exhaust gas. A device, a transfer pipe that transfers exhaust gas from a combustion device that generates exhaust gas by combustion to the exhaust gas processing device, a blower unit that causes a flow of air, and an air flowed by the blower unit, An air supply part having a ventilation part for supplying the exhaust gas treatment device with the exhaust gas treatment device when the exhaust gas treatment device is not in operation to discharge the exhaust gas remaining in the exhaust gas treatment device.

According to another embodiment of the present invention, an exhaust gas treatment system of the present invention blocks exhaust gas in the transfer pipe from flowing into the exhaust gas treatment device when the exhaust gas treatment device is not operating. Further, the ventilation part supplies the air to the exhaust gas treatment device in a state in which the transfer part is blocked by the transfer pipe blocking part.

According to still another embodiment of the present invention, in the exhaust gas treatment system of the present invention, the ventilation part has one end connected to the blower part and the other end connected to the transfer pipe blocking means in the transfer pipe. It has a ventilation air supply pipe communicating with a section between the exhaust gas treatment device and the exhaust gas treatment device.

According to still another embodiment of the present invention, in the exhaust gas treatment system of the present invention, the ventilation section further includes a ventilation air supply pipe valve that opens and closes a flow path of the ventilation air supply pipe. Characterize.

According to still another embodiment of the present invention, in the exhaust gas treatment system of the present invention, the transfer pipe blocking means is installed in the transfer pipe, receives air in a closed state, and exhausts air in the transfer pipe. It is characterized in that it is a transfer pipe damper valve that blocks the gas flow path.

According to still another embodiment of the present invention, in the exhaust gas processing system of the present invention, the air supply unit supplies the transfer pipe shutoff unit with the air generated by the blower unit. Is further included.

According to still another embodiment of the present invention, an exhaust gas treatment system of the present invention is a pipe branched from the transfer pipe, and a bypass for bypassing the exhaust gas in a state in which the transfer pipe cut-off means cuts off the pipe. A pipe and a bypass pipe that allows the exhaust gas to bypass the bypass pipe when the exhaust gas treatment device is not operating, and shuts off the bypass pipe so that the exhaust gas advances to the transfer pipe when the exhaust gas treatment device is operating. It is characterized by further comprising a blocking means.

According to still another embodiment of the present invention, in the exhaust gas treatment system of the present invention, the bypass pipe blocking means is installed in the bypass pipe, receives air in a closed state, and exhausts air in the bypass pipe. It is characterized in that it is a bypass piping damper valve that shuts off the gas flow path.

According to still another embodiment of the present invention, in the exhaust gas treatment system of the present invention, the air supply unit supplies a bypass pipe sealing unit with air generated by the blower unit to the bypass pipe cutoff unit. Is further included.

According to still another embodiment of the present invention, the exhaust gas treatment system of the present invention is connected to the exhaust gas treatment device and remains in a gaseous state in the cleaning liquid discharged from the exhaust gas treatment device. The air supply unit further includes a harmful gas removing unit that removes the gas and discharges the cleaning liquid from which the harmful gas in a gaseous state is removed, and the air supply unit supplies the air generated by the blower unit to the harmful gas removing unit. It further comprises a reaction inducing section for inducing a reaction with the harmful gas.

According to still another embodiment of the present invention, in the exhaust gas treatment system of the present invention, one end of the reaction inducing section is connected to the air blowing section and the other end is for a reaction communicating with the harmful gas removing means. It is characterized by having an air supply pipe.

According to another embodiment of the present invention, in the exhaust gas treatment system of the present invention, the reaction induction unit further includes a reaction air supply pipe valve that opens and closes a passage of the reaction air supply pipe. Is characterized by.

The present invention can obtain the following effects by combining and using the above-described embodiment and the configurations described below.

INDUSTRIAL APPLICABILITY The present invention has an effect of providing an exhaust gas treatment system that supplies air to the inside of the exhaust gas treatment device and discharges the remaining exhaust gas when the exhaust gas treatment device is not operating.

The present invention has an effect of providing an exhaust gas treatment system having an improved corrosion prevention function by ventilating the exhaust gas treatment device and drying moisture.

According to the present invention, an air blower for causing a flow of air and air flowed by the air blower are supplied to the exhaust gas treatment device when the exhaust gas treatment device is not in operation, and With the air supply unit having the ventilation unit for discharging the remaining exhaust gas, there is an effect of providing an exhaust gas processing system in which ventilation of the exhaust gas processing device and drying of moisture are efficiently performed.

According to the present invention, when the exhaust gas treatment device is not in operation, a transfer pipe cutoff unit that cuts off a transfer pipe that transfers the exhaust gas to the exhaust gas treatment device is provided, so that the air supplied by the ventilation unit is It is effective to provide an exhaust gas treatment system that is efficiently guided to the exhaust gas treatment device.

According to the present invention, the transfer pipe blocking means comprises a transfer pipe damper valve that receives air in a closed state and blocks an exhaust gas flow path in the transfer pipe, and the air supply unit is configured to flow by the blower unit. The present invention has an effect of providing an exhaust gas treatment system having a high efficiency of air supply and utilization, further comprising a transfer pipe sealing part for supplying generated air for sealing the transfer pipe damper valve.

The present invention provides a bypass pipe for bypassing exhaust gas when the exhaust gas treatment device is not operating, and a bypass pipe shutoff for shutting off the bypass pipe so that the exhaust gas advances to the transfer pipe when the exhaust gas treatment device is operating. The present invention has an effect of providing an exhaust gas treatment system in which the exhaust gas is bypassed efficiently by further including means.

According to the present invention, the bypass pipe cutoff means comprises a bypass pipe damper valve installed in the bypass pipe and receiving sealing air in a closed state to cut off an exhaust gas flow path in the bypass pipe. Provides an exhaust gas treatment system having a high efficiency of air supply and utilization, further comprising a bypass pipe sealing part for supplying air generated by the blower part for sealing the transfer pipe damper valve. Have an effect.

The present invention is connected to the exhaust gas treatment device, removes the harmful gas remaining in a gaseous state in the cleaning liquid discharged from the exhaust gas treatment device, and discharges the cleaning liquid from which the gaseous harmful gas is removed. The air supply unit further includes a harmful gas removing unit, and the air supply unit further includes a reaction inducing unit that supplies the air generated by the blower unit to the harmful gas removing unit to induce a reaction with the harmful gas. An effect is provided of providing an exhaust gas treatment system that minimizes the emission of substances.

1 is a configuration diagram of an exhaust gas treatment system according to an embodiment of the present invention. The perspective view of one embodiment of the transfer piping damper valve with which the exhaust-gas processing system of the present invention is equipped. The figure showing the operation mode at the time of operation of the exhaust gas processing unit in the exhaust gas processing system according to one embodiment of the present invention. FIG. 6 is a diagram showing an operating state of the exhaust gas treatment device when the exhaust gas treatment device according to the embodiment of the present invention is not in operation. 1 is a perspective view of an exhaust gas treatment device according to a first embodiment. The cut-away perspective view of the exhaust gas treatment device according to the first embodiment. FIG. 2 is a sectional view taken along the line A-A′ of FIG. FIG. 6 is a reference diagram illustrating a process of treating exhaust gas in the cross section of FIG. 5. FIG. 3 is a cut-away perspective view of a pretreatment device of the exhaust gas treatment device according to the first embodiment. FIG. 10 is a sectional view taken along the line A1-a1′ of section A in FIG. 9. FIG. 10 is a sectional view taken along the line A2-a2′ of section A in FIG. 9. FIG. 10 is a cross-sectional view taken along the line'b-b' of section B in FIG. 9. The perspective view of the stirring means of the exhaust gas treatment device according to the first embodiment. FIG. 10 is a cross-sectional view taken along line C1-c1′ of section C of FIG. 9. FIG. 10 is a sectional view taken along the line C2-c2′ of the section C of FIG. 9. FIG. 3 is a cut-away perspective view of the aftertreatment device of the exhaust gas treatment device according to the first embodiment. FIG. 17 is a sectional view taken along line d1-d1′ of section D in FIG. 16. FIG. 17 is a sectional view taken along line d2-d2′ of section D of FIG. 16. The perspective view of the diffusion means of the exhaust gas treatment device according to the first embodiment. The perspective view of the packing support means of the exhaust gas treatment device according to the first embodiment. FIG. 21 is a sectional view taken along line B-B′ of FIG. FIG. 17 is a cross-sectional view taken along the line E1-e1′ of the section E of FIG. 16. FIG. 17 is a cross-sectional view taken along the line E2-e2′ of the section E of FIG. 16. FIG. 17 is a sectional view taken along line f-f′ of section F of FIG. 16. FIG. 25 is a reference diagram illustrating the cleaning process in FIG. 24. FIG. 17 is a sectional perspective view taken along the line g-g′ of section G in FIG. 16. FIG. 27 is a reference diagram illustrating a water drop blocking process in FIG. 26. The perspective view of the exhaust gas treatment equipment according to a 2nd embodiment. The cut-away perspective view of the exhaust gas treatment device according to the second embodiment. f1-f1' sectional drawing. The disassembled perspective view which shows the spreading|diffusion means of the exhaust gas processing apparatus according to 2nd Embodiment. The a-a' sectional view of the A section of FIG. FIG. 30 is a cross-sectional view taken along the line a-a′ of the section A in FIG. 29, which shows a state in which the ship is inclined by rolling. FIG. 30 is a cross-sectional view taken along the line a-a′ of the section A in FIG. 29, showing how exhaust gas flows. The perspective view which shows the injection means of the exhaust gas processing apparatus according to 2nd Embodiment. FIG. 30 is a sectional view taken along line b1-b1′ of section B of FIG. 29. FIG. 30 is a sectional view taken along the line B2-b2′ of section B of FIG. 29. The conceptual diagram which shows a mode that the injection means of the exhaust gas treatment device according to the second embodiment injects the cleaning liquid. The perspective view which shows the distribution means of the exhaust gas processing apparatus according to 2nd Embodiment. FIG. 30 is a sectional view taken along the line C1-c1′ of the section C of FIG. 29. FIG. 30 is a sectional view taken along the line C2-c2′ of the section C of FIG. 29. FIG. 30 is a cross-sectional view taken along line A1-B1 of FIG. 29 taken along line c1-c1′ showing how exhaust gas flows. The perspective view which shows the multiple injection means of the exhaust gas treatment apparatus according to 2nd Embodiment. FIG. 30 is a cross-sectional view taken along line d1-d1′ of section D of FIG. 29. FIG. 30 is a cross-sectional view taken along line d2-d2′ of section D of FIG. 29. FIG. 30 is a cross-sectional view taken along line d2-d2′ of section D of FIG. 29. The disassembled perspective view which shows the 1st type water droplet separation means of the exhaust gas treatment apparatus according to 2nd Embodiment. FIG. 30 is a cross-sectional view taken along line E1-e1′ of section E of FIG. 29. The e2-e2' sectional view of the E section of FIG. The perspective view which shows a mode that exhaust gas flows by the 1st type water droplet separation means of the exhaust gas treatment equipment according to a 2nd embodiment. The disassembled perspective view which shows the 2nd type water drop separation means of the exhaust gas treatment apparatus according to 2nd Embodiment. FIG. 30 is a cross-sectional view taken along line E1-e1′ of section E of FIG. 29. The e2-e2' sectional view of the E section of FIG. The perspective view which shows a mode that exhaust gas flows by the 2nd type water drop separation means of the exhaust gas treatment equipment according to a 2nd embodiment. The perspective view of the E, D section of FIG. FIG. 30 is a cross-sectional view taken along line E1-e1′ of sections E and D of FIG. 29. The partial cutaway perspective view showing the water drop interception means of the exhaust gas treatment equipment according to a 2nd embodiment. The f1-f1' sectional view of the F section of FIG. The block diagram of the exhaust gas processing system according to other embodiment of this invention.

Hereinafter, a system and method for removing harmful gas in an exhaust cleaning liquid of an exhaust gas treating apparatus according to the present invention will be described in detail with reference to the accompanying drawings. Unless defined otherwise, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and, as used herein, In the event of a conflict with the meaning of a term, the definition used in this specification is followed. In addition, detailed description of known functions and configurations that may obscure the subject matter of the present invention will be omitted.

In the present invention, the exhaust gas means a gas generated in the process of burning fuel to drive an engine, a boiler, etc., and harmful substances in the exhaust gas are sulfates ( SOx), nitrogen oxide (NOx), PM (Particular Matter, particulate matter), etc. are meant. Although the harmful gas removing system and method in the exhaust cleaning liquid of the exhaust gas treating apparatus according to the present invention is mainly intended for treating exhaust gas in a ship, its application is not limited to being applied only to the ship.

FIG. 1 shows a configuration diagram of an exhaust gas treatment system according to an embodiment of the present invention. Referring to this, the exhaust gas treatment system of the present invention includes an exhaust gas treatment device 1, a transfer pipe 2, a transfer pipe cutoff means 3, a bypass pipe 4, a bypass pipe cutoff means 5, a harmful gas removal means 6, a blower section 7 and An air supply unit 8 can be provided.

The exhaust gas processing device 1 is a device into which exhaust gas generated by combustion flows and which injects a cleaning liquid into the exhaust gas to remove harmful substances in the exhaust gas. In the case where the present invention is applied to a ship, the harmful substance may include sulfate (SOx), and the cleaning liquid may be fresh water or seawater containing an alkaline additive. The exhaust gas treatment device 1 receives fresh water or seawater containing an alkaline additive as a cleaning liquid and injects it to dissolve sulfates (SOx) in the exhaust gas to remove toxicity, and the exhaust pipe S Discharge from. That is, the exhaust gas treatment device 1 has an open mode in which a cleaning liquid supply unit (not shown) pumps seawater and supplies it as a cleaning liquid, and then discharges the discharged cleaning liquid to the outside without recirculating it. Alternatively, it may be operated in a close mode in which fresh water containing an alkaline additive is supplied as a cleaning solution and then the discharged cleaning solution is recycled. The exhaust gas treatment device 1 will be described later in the first embodiment (1a) and the second embodiment (1b).

The transfer pipe 2 is a portion that transfers the exhaust gas from the combustion device C that generates the exhaust gas by combustion to the exhaust gas processing device 1. The combustion device C may include a main engine of a ship, an auxiliary engine, a boiler, and the like. As shown in FIG. 1, the transfer pipe 2 connects the combustion apparatus C and the exhaust gas processing apparatus 1 so that the exhaust gas generated by the combustion apparatus C can be moved to the exhaust gas processing apparatus 1. To do.

The transfer pipe blocking means 3 is a part that blocks the exhaust gas in the transfer pipe 2 from flowing into the exhaust gas processing device 1 when the exhaust gas processing device 1 is not operating. The transfer pipe blocking means 3 may be a valve that plays a role of blocking the exhaust gas flow path in the transfer pipe 2.

Specifically, the transfer pipe blocking means 3 may be a damper valve that is a closed valve that blocks a medium such as air or process gas. The airtightness of the damper valve can be obtained by various methods, but the airtightness is ensured by the sealing air supplied between the blades spaced apart while forming the disk of the damper valve. Ceiling air dampers may be used. That is, the transfer pipe blocking means 3 may be a transfer pipe damper valve installed in the transfer pipe 2 to receive air in a closed state to block an exhaust gas flow path in the transfer pipe 2. ..

FIG. 2 shows a perspective view of an embodiment of the transfer pipe blocking means 3 provided in the exhaust gas treatment system of the present invention. Referring to FIG. 3, the transfer pipe shut-off means 3 includes a transfer pipe damper valve, and may include a valve casing 31, a valve disc 32, and an actuator 33.

The valve casing 31 is installed in the transfer pipe 2, forms a flow passage that allows the exhaust gas to flow by communicating with the exhaust gas flow passage of the transfer pipe 2, and sealing air for ensuring airtightness flows in. It has a sealing air inflow port 311 which is a passage.

The valve disc 32 has a structure in which two blades 32a and 32b are separated from each other. Each of the blades 32a and 32b has a shape corresponding to the flow path formed by the valve casing 31 so that the flow path formed by the valve casing 31 can be closed. According to the valve disk 32 having such a structure, when the flow path is closed by the valve disk 32, a space S is formed between the blades 32a and 32b, and the space S is formed in the space S from the sealing air inlet 311. When air is injected, an airtight structure for blocking exhaust gas or preventing backflow is formed. At this time, the supply pressure of air needs to be higher than the pressure of the exhaust gas in the transfer pipe 2, and the air forms an air barrier as sealing air, and the air of the valve disc 32 and the valve casing 31 is formed. Ensure airtightness in the gap between the inner wall.

The actuator 33 is driven by the supplied high-pressure fluid or electricity to rotate the valve disc 32, thereby interrupting the flow path provided in the valve casing 31. The valve disc 32 and the actuator 33 can be connected by a drive shaft (not shown), and the driving of the valve disc 32 by the actuator 33 is a technique widely used in the technical field to which the present invention belongs. Therefore, detailed description of the operating structure and principle of the actuator 33 will be omitted.

The bypass pipe 4 is a pipe branched from the transfer pipe 2, and is a portion that bypasses the exhaust gas while being blocked by the transfer pipe blocking means 3. Referring to FIG. 1, the bypass pipe 4 is branched at a branch portion P of the transfer pipe 2 and is connected to an exhaust unit (EXHAUST STACK). When the exhaust gas processing device 1 is not in operation, the exhaust gas is exhausted from the exhaust unit (EXHAUST STACK) through the bypass pipe 4.

The bypass pipe blocking means 5 allows the exhaust gas to bypass the bypass pipe 4 when the exhaust gas treatment device 1 is not in operation, but the exhaust gas is passed to the transfer pipe 2 when the exhaust gas treatment device 1 is in operation. It is a part that shuts off the bypass pipe 4 so as to proceed. The bypass pipe blocking means 5 can be configured by a valve that plays a role of blocking the exhaust gas flow path in the bypass pipe 4.

As the bypass pipe blocking means 5, a sealing air damper may be used that secures airtightness by sealing air supplied between blades spaced apart while forming a disc of a damper valve. Specifically, the bypass pipe cutoff means 5 is a damper valve having the same configuration as the transfer pipe cutoff means 3 as shown in FIG. 2, and is installed in the bypass pipe 4 to receive air in a closed state. It may be a bypass pipe damper valve that shuts off the exhaust gas flow path in the bypass pipe 4.

The harmful gas removing means 6 is connected to the exhaust gas processing apparatus 1, removes the harmful gas remaining in a gas state in the cleaning liquid discharged from the exhaust gas processing apparatus 1, and removes the gaseous harmful gas. This is a part for discharging the cleaned liquid. The harmful gas removing means 6 comprises a tubular conduit having one end communicating with the cleaning liquid outflow portion of the exhaust gas treatment device 1 and the other end having a discharge portion. The cleaning liquid discharged from the exhaust gas treatment device 1 is temporarily stored, and harmful gas is removed during the storage time.

Specifically, the harmful gas removing means 6 is arranged such that the one end is located at the upper side, and the oxidizing solution and the harmful gas are discharged while the inflowing cleaning solution proceeds downward. It can be configured to have a falling flow velocity of 0.45 m/sec and a dwell time of 4.5 sec.

The cleaning liquid discharged from the exhaust gas treatment apparatus 1 contains a harmful gas in the exhaust gas, that is, sulfate (SOx) in a state in which it is almost dissolved and has no toxicity, but a part remains in a gas state. It may exist in the state of being trapped in the cleaning liquid. If such a harmful gas in a gaseous state is contained in the cleaning liquid as it is and is discharged to the outside, it causes environmental pollution, and therefore it must be removed. The harmful gas removing unit 6 removes the harmful gas in a gaseous state contained in the cleaning liquid discharged from the exhaust gas processing apparatus 1.

The cleaning liquid discharged from the harmful gas removing means 6 may flow into the cleaning liquid tank T for reuse as shown in FIG. Also, unlike this, it may be discharged to the outside. Generally, the discharged cleaning liquid flows into the cleaning liquid tank T for reuse in the closed mode, and is discharged outside in the open mode.

The blower 7 is a part that causes the flow of air. The blower unit 7 causes air to flow in the direction of an air supply unit 8 described later. The blower unit 7 may include a fan 71, a check valve 72, and a connection port 73.

The fan 71 is a device that generates a flow force in the air. The fan 71 may include an impeller for forming a flow force and a casing for guiding the flow. Referring to FIG. 1, the blower unit 7 has two fans 71 arranged in parallel. This is for stably generating a flow of air, and the two fans 71 are provided. One of them is a redundancy in case of the other failure, that is, a preliminary configuration. Of course, three or more fans 71 may be provided in parallel.

The check valve 72 plays a role of checking the flow pressure of air. The measurement result of the check valve 72 is fed back, and the output of the fan 71 can be adjusted.

The connection port 73 is a portion to which a pipe that needs to supply the air whose flow has been generated by the fan 71 is connected. One or more pipes may be connected to the connection port 73, and the air generated by the fan 71 is distributed and supplied to the one or more pipes connected to the connection port 73.

The air supply unit 8 is a unit that supplies the air in which the flow has been generated by the blower unit 7. The air supply unit 8 may include a ventilation unit 81, a transfer pipe sealing unit 82, a bypass pipe sealing unit 83, and a reaction guiding unit 84.

The ventilation part 81 supplies the air generated by the blower part 7 to the exhaust gas treatment device 1 when the exhaust gas treatment device 1 is not operating, and remains in the exhaust gas treatment device 1. This is the part that discharges the exhaust gas. The ventilator 81 supplies the air to the exhaust gas treatment device 1 while the exhaust gas treatment device 1 is not operating, in a state where the transfer pipe blocking means 3 blocks the exhaust gas treatment device 1. The air supplied from the ventilation unit 81 ventilates and dries the inside of the exhaust gas treatment device 1.

As shown in FIG. 1, the ventilation part 81 may include a ventilation air supply pipe 811 and a ventilation air supply pipe valve 812.

The ventilation air supply pipe 811 has one end connected to the blower unit 7 and the other end connected to a section of the transfer pipe 2 between the transfer pipe blocking means 3 and the exhaust gas treatment device 1. Is. The air generated by the blower 7 flows through the ventilation air supply pipe 811 and flows into the section of the transfer pipe 2 between the transfer pipe blocking means 3 and the exhaust gas treatment device 1. The exhaust gas treatment device 1 proceeds to the inside thereof to perform forced ventilation of residual exhaust gas in the exhaust gas treatment device 1 and drying of moisture.

The ventilation air supply pipe valve 812 is a valve that opens and closes the flow path of the ventilation air supply pipe 811. When the ventilation air supply pipe valve 812 is opened, the air generated by the blower unit 7 is supplied to the exhaust gas treatment device 1 through the ventilation air supply pipe 811 and the ventilation air is supplied. When the supply pipe valve 812 is closed, the air supply is shut off.

The transfer pipe sealing part 82 is a part that supplies the transfer pipe blocking means 3 with the air whose flow is generated by the blower 7. As described above, the transfer pipe sealing part 82 is a transfer pipe damper valve that receives air when the transfer pipe blocking means 3 is closed and blocks a flow path in the transfer pipe 2, and the transfer pipe sealing part 82 is a transfer pipe sealing valve. The sealing air is supplied to the shutoff means 3. The air supplied from the transfer pipe sealing unit 82 seals the transfer pipe blocking means 3.

As shown in FIG. 1, the transfer pipe sealing unit 82 may include an air supply pipe 821 for transfer pipe sealing and an air supply pipe valve 822 for transfer pipe sealing.

The transfer pipe sealing air supply pipe 821 has one end connected to the blower unit 7 and the other end connected to the transfer pipe blocking means 3. Furthermore, the other end of the transfer pipe sealing air supply pipe 821 may be connected to the sealing air inlet 311 of the valve casing 31. The air supplied through the transfer pipe sealing air supply pipe 821 forms an air barrier as sealing air, and is airtight in a gap between the valve disc 32 and the inner wall of the valve casing 31. Secure. At this time, the supply pressure of air through the transfer pipe sealing air supply pipe 821 may be 500 to 700 mmAq.

The transfer pipe sealing air supply pipe valve 822 is a valve that opens and closes a flow path of the transfer pipe sealing air supply pipe 821. When the transfer pipe sealing air supply pipe valve 822 is opened, the air generated by the blower 7 is supplied to the transfer pipe blocking means 3 through the transfer pipe sealing air supply pipe 821. When the transfer pipe sealing air supply pipe valve 822 is closed, the air supply is cut off.

The bypass pipe sealing portion 83 is a portion that supplies the air, the flow of which is generated by the blower 7, to the bypass pipe blocking means 5. As described above, when the bypass pipe sealing unit 83 includes a bypass pipe damper valve that receives air when the bypass pipe blocking unit 5 is closed and shuts off the flow passage in the bypass pipe 4, the bypass pipe sealing unit 83 is used. The sealing air is supplied to the shutoff means 5. The air supplied from the bypass pipe sealing portion 83 seals the bypass pipe blocking means 5.

As shown in FIG. 1, the bypass pipe sealing portion 83 may include an air supply pipe 831 for bypass pipe sealing and an air supply pipe valve 832 for bypass pipe sealing.

The bypass pipe sealing air supply pipe 831 has one end connected to the blower unit 7 and the other end connected to the bypass pipe blocking means 5. The air supplied through the bypass pipe sealing air supply pipe 831 forms an air barrier as sealing air to ensure the airtightness of the bypass pipe blocking means 5. At this time, the supply pressure of air through the bypass pipe sealing air supply pipe 831 may be 500 to 700 mmAq.

The bypass pipe sealing air supply pipe valve 832 is a valve that opens and closes a flow path of the bypass pipe sealing air supply pipe 831. When the bypass pipe sealing air supply pipe valve 832 is opened, the air generated by the blower unit 7 is supplied to the bypass pipe blocking means 5 through the bypass pipe sealing air supply pipe 831. When the bypass pipe sealing air supply pipe valve 832 is closed, the air supply is cut off.

The reaction inducing section 84 is a section that supplies the harmful gas removing means 6 with the air that has flowed by the blower section 7 and induces a reaction with the harmful gas. The reaction induction unit 84 supplies air to SOx contained in the cleaning liquid inside the harmful gas removing unit 6 to induce an oxidation reaction. As a result, the harmful gas in the cleaning liquid stored in the harmful gas removing means 6 can be smoothly removed.

As shown in FIG. 1, the reaction induction unit 84 may include a reaction air supply pipe 841 and a reaction air supply pipe valve 842.

One end of the reaction air supply pipe 841 is connected to the blower unit 7, and the other end is a pipe connected to the harmful gas removing unit 6. The air supplied through the reaction air supply pipe 841 is air for inducing a reaction, and reacts with SOx in a gas state contained in the cleaning liquid inside to remove harmful gas.

The reaction air supply pipe valve 842 is a valve that opens and closes the flow path of the reaction air supply pipe 841. When the reaction air supply pipe valve 842 is opened, the air generated by the blower 7 is supplied to the harmful gas removing means 6 through the reaction air supply pipe 841 to supply the reaction air. When the tube valve 842 is closed, the air supply is shut off.

FIG. 3 shows an operating state of the exhaust gas treatment device in operation in the exhaust gas treatment system according to the embodiment of the present invention, and FIG. 4 shows exhaust gas treatment in the exhaust gas treatment system according to the embodiment of the present invention. The operation state when the apparatus is not in operation is shown. The operation process of the exhaust gas treatment system of the present invention will be described with reference to these drawings.

First, referring to FIG. 3, when the exhaust gas treatment apparatus 1 is in operation, the bypass pipe blocking means 5 shuts off the bypass pipe 4. One end of the ventilation air supply pipe 811, the transfer pipe sealing air supply pipe 821, the bypass pipe sealing air supply pipe 831 and the reaction air supply pipe 841 is connected to the connection port 73. The supply pipe valve 812 and the transfer pipe sealing air supply pipe valve 822 are closed, and the bypass pipe sealing air supply pipe valve 832 and the reaction air supply pipe valve 842 are opened (the closed valve is displayed in black and is opened). When the fan 71 of the blower unit 7 is driven, the flow of air is supplied to the bypass pipe sealing air supply pipe 831 and the reaction air supply pipe 841 through the connection port 73. Done (indicated by thin arrows). As a result, the bypass pipe 4 is shut off by the air supplied with the bypass pipe shut-off means 5 closed, and reaction air is supplied to the harmful gas removing means 6. In addition, the exhaust gas flows into the exhaust gas processing device 1 through the transfer pipe 2 and is discharged from the exhaust pipe S after the harmful substances are removed (indicated by a thick arrow).

Next, referring to FIG. 4, when the exhaust gas treatment device 1 is not in operation, the transfer pipe interrupting means 3 interrupts the transfer pipe 2. The ventilation air supply pipe valve 812 and the transfer pipe sealing air supply pipe valve 822 are opened, and the bypass pipe sealing air supply pipe valve 832 and the reaction air supply pipe valve 842 are closed (the closed valve is black. When the fan 71 of the blower unit 7 is driven with the displayed and open valve in white), air is supplied to the ventilation air supply pipe 811 and the transfer pipe sealing air supply pipe 821 through the connection port 73. The fluid supply is done (indicated by a thin arrow). Thereby, the transfer pipe 2 is shut off by the air supplied with the transfer pipe shut-off means 3 closed, and the residual exhaust gas is forcibly ventilated by the air supplied through the ventilation air supply pipe 811. The water is dried. Further, the exhaust gas is discharged from the exhaust unit (EXHAUST STACK) through the bypass pipe 4 (indicated by a thick arrow). As a result, corrosion of the exhaust gas treatment device 1, the transfer pipe blocking means 3, etc. can be prevented and the durability can be improved.

The exhaust gas treatment system according to the embodiment of the present invention shown in FIG. 1 includes a fan 71 of the blower unit 7, a check valve 72, the transfer pipe blocking unit 3, the bypass pipe blocking unit 5, and the ventilation air. A control unit (wirelessly) connected to the supply pipe valve 812, the transfer pipe sealing air supply pipe valve 822, the bypass pipe sealing air supply pipe valve 832, the reaction air supply pipe valve 842, and the like to control them. No.) can be further provided. The control unit includes a computer device in which a control program is installed, and may include an input unit or an operation unit for receiving a control command from the outside. Further, when the present invention is applied to a ship, the control unit may be configured integrally with a control panel that controls other devices of the ship, including the exhaust gas treatment device 1 and the like.

On the other hand, hereinafter, the first embodiment (1a) and the second embodiment (1b) of the exhaust gas treatment device 1 will be described as specific embodiments of the exhaust gas treatment device 1 applicable to the exhaust gas treatment system of the present invention. Will be described. In addition to the embodiments of the exhaust gas treatment device 1 described below, the exhaust gas treatment device 1 can have various forms, and the exhaust gas treatment device according to the first embodiment (1a) and the second embodiment (1b) can be used. The processing device 1 is not limited.

Referring to FIG. 5 to FIG. 8, the exhaust gas treatment device 1a according to the first embodiment includes a pretreatment device 11, a connecting portion 12, and a posttreatment device 13.

The process of processing the exhaust gas in the exhaust gas processing apparatus 1a will be briefly described with reference to FIG. In FIG. 8, the thick arrow means the flow of gas, the dotted line means the sprayed cleaning liquid, and the thin arrow means the discharged cleaning liquid.

When the exhaust gas generated by the combustion flows into the exhaust gas inflow portion 1112, the pretreatment device 11 primarily produces harmful substances into a reduced pretreatment gas and discharges it through the pretreatment gas outflow portion 1113. The connection part 12 moves the pretreatment gas to the posttreatment device 13. The post-treatment device 13 additionally removes harmful substances from the pre-treatment gas flowing through the pre-treatment gas inflow portion 1312 and discharges the harmful substances through the post-treatment gas outflow portion 1313.

The cleaning liquid used to flow into the cleaning liquid inlet 1114 of the pretreatment device 11 to remove the harmful substances in the exhaust gas from the pretreatment device 11 and the harmful substances of the pretreatment gas from the posttreatment device 13 are removed. The cleaning liquid used to flow into the cleaning liquid inflow portion 1314 of the post-treatment device 13 to be removed is discharged through the cleaning liquid outflow portions 1115 and 1315 formed under the pre-treatment device 11 and the post-treatment device 13, respectively. To be done.

When the present invention is applied to a ship, seawater or fresh water mixed with an alkaline additive may be used as the cleaning liquid, and the exhaust gas is generated in a combustion process of an engine or a boiler of the ship. And the harmful substances mean sulfate (SOx) and PM.

The pre-treatment device 11 primarily serves to reduce harmful substances from the exhaust gas generated by combustion. As shown in FIGS. 6 to 9, the pretreatment unit 11 includes a pretreatment unit housing 111, a first pretreatment injection unit 112, a stirring unit 113, and a second pretreatment injection unit 114.

The pre-treatment device housing 111 is a part that forms the outer shape of the pre-treatment device 11 and forms a flow path of the exhaust gas inside. The pretreatment housing 111 includes an inner wall 1111, an exhaust gas inflow portion 1112, a pretreatment gas outflow portion 1113, a cleaning liquid inflow portion 1114, and a cleaning liquid outflow portion 1115. Referring to FIG. 5 to FIG. 9, in one embodiment of the present invention, the pretreatment housing 111 is formed of a cylindrical tower, and the inflowing exhaust gas is moved from the upper portion to the lower portion of the pretreatment housing 111. Forming a flow path through which harmful substances in the exhaust gas can be removed temporarily.

The inner wall 1111 is a portion that forms a flow path of the exhaust gas inside the pretreatment housing 111. Referring to FIG. 6, in the exemplary embodiment of the present invention, the inner wall 1111 has a cylindrical flow path of the exhaust gas inside the pretreatment housing 111.

The exhaust gas inflow portion 1112 is a portion where the exhaust gas flows into the pretreatment unit housing 111. As shown in FIGS. 6 to 9, the exhaust gas inflow portion 1112 is formed at the upper end of the pretreatment housing 111, and the exhaust gas flowing through the exhaust gas inflow portion 1112 is formed by the inner wall 1111. It moves downward along a cylindrical flow path.

The pretreatment gas outflow portion 1113 is a portion from which the pretreatment gas, which is the exhaust gas from which the harmful substances have been primarily removed, is discharged from the pretreatment device 11. As can be seen from FIGS. 6 to 9, the pretreatment gas outlet 1113 is formed at one side of the lower portion of the pretreatment housing 111, and the pretreatment gas discharged through the pretreatment gas outlet 1113. Is transferred to the post-processing device 13 through the connecting part 12.

The cleaning liquid inflow portion 1114 is a portion into which the cleaning liquid to be injected inside the pretreatment device 11 flows. As can be seen from FIG. 9, the cleaning liquid inflow portion 1114 is connected or formed to a first pretreatment injection means 112 and a second pretreatment injection means 114, which will be described later.

The cleaning liquid outflow portion 1115 is provided with the first pretreatment injection means 112 and the second pretreatment injection means for removing harmful substances in the exhaust gas flowing into the pretreatment housing 111 through the exhaust gas inflow portion 1112. This is a portion where the cleaning liquid sprayed by 114 is discharged. As shown in FIGS. 6 to 9, the cleaning liquid outflow portion 1114 is formed at the lower end of the pretreatment device housing 111, and the first pretreatment injection unit 112 and the second front portion are passed through the cleaning liquid outflow portion 1114. The cleaning liquid sprayed by the processing spraying means 114 collects harmful substances in the exhaust gas, moves to the lower end of the pre-treatment device housing 111, and can be discharged to the outside. In order to smoothly discharge the cleaning liquid, the lower end of the pre-treatment device housing 111 is preferably formed to converge toward the cleaning liquid outflow portion 1114.

The first pre-treatment injection unit 112 is disposed inside the pre-treatment device housing 111 in the vicinity of the exhaust gas inflow portion 1112 and injects a cleaning liquid into the exhaust gas flowing through the exhaust gas inflow portion 1112. Is. As described above, seawater, fresh water mixed with an alkaline additive, or the like may be used as the cleaning solution.

The first pretreatment injection unit 112 cools the exhaust gas flowing through the exhaust gas inflow unit 1112. The exhaust gas flowing through the gas inflow part 1112 generally has a temperature of 250 to 350° C., but the temperature of the exhaust gas is reduced to 50 to 50° C. due to the cleaning liquid injected by the first pretreatment injection means 112, and the volume thereof is reduced. Like

In addition, the first pre-treatment injection means 112 enables PM to be temporarily collected by the cleaning liquid, among the harmful substances in the exhaust gas. The exhaust gas contacted with the cleaning liquid injected by the first pretreatment injection means 112 changes its flow path from a straight line to a spiral shape through the stirring means 113, and is injected by a second pretreatment injection means 114 described later. It comes into contact with the cleaning solution. As a result, the size of the cleaning liquid in which the first pretreatment spraying unit 112 is sprayed to collect the harmful substances is increased, and the cleaning liquid is moved to the lower portion of the preprocessor housing 111 due to gravity.

It is preferable that the first pretreatment jetting unit 112 jets the cleaning liquid into a fine droplet form as compared with the second pretreatment jetting unit 114. Specifically, the first pretreatment spraying unit 112 may spray the cleaning liquid in a droplet form having a particle size of 100 to 200 μm. Among the harmful substances of the exhaust gas, PM has a particle size of about 0.1 to 0.5 μm, but when the cleaning liquid is ejected in the form of droplets having a particle size of 100 to 200 μm, the PM is efficiently discharged. It is effective in coagulating well and solidifying in the cleaning liquid.

Referring to FIGS. 10 and 11, in one embodiment of the present invention, the first pretreatment injection unit 112 includes a rod-shaped injection body 1121 and an injection port 1122 formed at one end of the injection body 1121. The jet body 1121 can receive the cleaning liquid and the compressed air from the cleaning liquid supply means (not shown) through the cleaning liquid inflow portion 1114. The jet body 1121 receives the cleaning liquid together with compressed air and transfers the cleaning liquid to the jet port 1122, and the jet port 1122 jets the cleaning liquid toward the exhaust gas.

On the other hand, the first pretreatment injection means 112 is disposed horizontally on a cross section perpendicular to the traveling direction of the exhaust gas on the flow path of the exhaust gas formed by the inner wall 1111 of the pretreatment housing 111, and the inner wall. At 1111, a large number of protrusions are arranged at fixed angular intervals toward the center of the flow path. Through such an arrangement, the cleaning liquid can be efficiently injected into the exhaust gas flowing into the exhaust gas inflow portion 1112 and advancing toward the stirring means 113 side.

The specific shape and arrangement of the first pretreatment injection unit 112 may be changed according to the design of the injection capacity of the first pretreatment injection unit 112 and the overall path of the pretreatment unit 11.

The stirring means 113 is disposed inside the pretreatment housing 111 between the first pretreatment injection means 112 and the second pretreatment injection means 114 so that the exhaust gas on the flow path is curved. It is preferably a part that fulfills the role of making it flow in a spiral shape. In one embodiment of the present invention, the pre-treatment unit housing 111 forms a vertically downward exhaust gas flow path from an upper portion to a lower portion, and the agitation unit 113 flows in through the exhaust gas inflow portion 1112 and is linearly downward. It changes the flow of exhaust gas to a curved type, preferably a spiral type.

When the flow of the exhaust gas on the flow path is changed from a straight line to a curved line by the stirring means 113, the flow path becomes long, and as a result, contact with the cleaning liquid sprayed by the second pretreatment spraying means 114. Time will increase. As a result, the ratio of trapping harmful substances such as PM and SOx in the exhaust gas by the cleaning liquid increases. Therefore, it is preferable that the stirring means 113 is disposed adjacent to the exhaust gas inflow portion 1112.

In this way, it becomes possible to improve the removal time of harmful substances in the exhaust gas relative to the internal space of the pretreatment device housing 111 through the stirring means 113, without increasing the height of the pretreatment device 11. Alternatively, even if the height of the exhaust gas is reduced, the efficiency of removing harmful substances in the exhaust gas can be improved. As a result, the equipment can be downsized.

Referring to FIGS. 12 and 13, the stirring means 113 is arranged to cover the flow path, and includes a central body 1131, a plurality of blades 1132 and a space portion 1133. The combined flange portion 1334 is seated on a step portion 1111a formed on the inner wall 1111 of the pretreatment housing 111. If necessary, the stirring means 113 may be arranged to be coupled to the inner wall 1111 of the pretreatment housing 111 by welding or the like.

The body 1131 is a central portion of the stirring means 113, and the blades 1132 are radially connected to the body 1131 with a predetermined twist angle. The space portion 1133 is a portion that forms a space between the blades 1132 through which the exhaust gas can pass without touching the blades 1132.

As shown in FIG. 12, in one embodiment of the present invention, in the stirring means 113, six blades 1132 are twisted and joined at an angle of 30° along the outer surface of the body 1131. The space 1133 is formed between the wings 1132.

When the agitating means 113 is configured in this way, the flow of the exhaust gas passing through the agitating means 113 is formed in a spiral shape, and the flow path of the exhaust gas formed by the inner wall 1111 of the pretreatment housing 111. Can be formed symmetrically along the center of the moving direction, the flow becomes smooth, and the cleaning liquid is sprayed by the first pretreatment jetting means 112 and the second pretreatment jetting means 114. The harmful substances in the exhaust gas flow on the inner wall 1111 of the housing 111.

On the other hand, if the space 1132 does not appear between the blades 1132, the exhaust gas flowing through the exhaust gas inflow part 1112 may be subject to excessive pressure loss when passing through the stirring means 113. It is not preferable because of the flow of the exhaust gas.

Further, it is preferable that the stirring means 113 is fixed without rotating. This is because the exhaust gas flowing in through the exhaust gas inflow portion 1112 generally has a sufficient fluid supply speed toward the pretreatment gas outflow portion 1113, so that the exhaust gas on the flow path is directly advanced. This is because it is not necessary to supply energy.

The second pretreatment injection means 114 is disposed between the agitating means 113 and the pretreatment gas outflow portion 1113 inside the pretreatment device housing 111, and passes through the agitating means 113 through the flow path. This is a portion for injecting the cleaning liquid into the exhaust gas that progresses in a spiral shape.

The second pre-treatment injection means 114 passes through the stirring means 113 toward the pre-treatment gas outflow portion 1113 located in the lower portion of the pre-treatment device housing 111, so that the exhaust gas progresses in a curved shape, preferably in a spiral shape. By additionally injecting the cleaning liquid, by inducing aggregation of the cleaning liquid in a state in which harmful substances such as PM that are injected by the first pretreatment injection unit 112 and contained in the exhaust gas are collected, The size is made larger so that it flows on the inner wall 1111 of the pre-treatment device housing 111 or efficiently drops to the lower part of the pre-treatment device housing 111.

In order to increase the size of the cleaning liquid, the second pretreatment injection means 114 is in a state of collecting harmful substances such as PM in the exhaust gas by being injected by the first pretreatment injection means 112 as described above. It is preferable that the cleaning liquid having a particle size larger than that of the cleaning liquid sprayed by the first pretreatment spraying means 112 is sprayed. Specifically, it is preferable that the second pretreatment jetting means 114 jets the cleaning liquid in a droplet form having a particle size of 500 to 1,000 μm.

Referring to FIGS. 14 and 15, in the exemplary embodiment of the present invention, the second pretreatment jetting means 114 includes a rod-shaped jetting body 1141 and a plurality of branching bodies arranged side by side at regular intervals in the jetting body 1141. The injection table 1142 and a plurality of injection ports 1143 formed at regular intervals in each injection table 1142. The jet body 1141 may receive the cleaning liquid and the compressed air from the cleaning liquid supply unit (not shown) through the cleaning liquid inflow portion 1114. The jet body 1141 receives the cleaning liquid together with the compressed air and transmits the cleaning liquid to each of the jetting tables 1142, and the injection port 1143 injects the cleaning liquid toward the exhaust gas.

The second pretreatment jetting means 114 has a structure in which the jetting holes 1143 for jetting the cleaning liquid are more densely arranged than the first pretreatment jetting means 112, which is the stirring means 113. This is because it is advantageous to evenly inject the cleaning liquid toward the exhaust gas that is advancing in a spiral shape through the flow path without any blind spot area.

As described above in connection with the first pretreatment injection means 112, the specific form and arrangement of the second pretreatment injection means 114 are also the injection capacity of the second pretreatment injection means 114 and the pretreatment device. It may vary depending on the overall length design of eleven.

The connection part 12 is a part for moving a pretreatment gas, which is an exhaust gas in which harmful substances are temporarily reduced in the pretreatment device 11, to the posttreatment device 13. Referring to FIGS. 6 to 8, one end of the connection part 12 communicates with the pretreatment gas outflow part 1113 of the pretreatment device housing 111, and the other end thereof communicates with the pretreatment gas inflow part 1312 of the posttreatment device housing 131. Including a communicating passage.

The post-treatment device 13 serves to additionally remove harmful substances in the pre-treatment gas, which is exhaust gas in which the harmful substances are primarily reduced by the pre-treatment device 11. Referring to FIGS. 5 to 8 and 16, the post-treatment device 13 includes a post-treatment device housing 131, a diffusion means 132, a packing 133, a packing support means 134, a first post-treatment injection means 135, and a second post-treatment injection means. 136, a steam separation means 137, a cleaning means 138, and a water drop blocking means 139.

The post-treatment device housing 131 is a part that forms the outer shape of the post-treatment device 13 and forms a flow path of the pre-treatment gas therein. The post-treatment device housing 131 includes an inner wall 1311, a pre-treatment gas inflow portion 1312, a post-treatment gas outflow portion 1313, and a cleaning liquid outflow portion 1315. As shown in FIGS. 6 and 16, in one embodiment of the present invention, the post-treatment housing 131 is formed of a cylindrical tower to move the pre-treatment gas flowing through one side of the lower portion upward. Forming a flow path that can additionally remove harmful substances in the pretreatment gas.

The inner wall 1311 is a part that forms a flow path of the pretreatment gas inside the posttreatment device housing 131. Referring to FIGS. 6 and 16, the inner wall 1311 forms a flow path of the exhaust gas in a cylindrical shape inside the post-treatment device housing 131.

The pretreatment gas inflow portion 1312 is a portion into which the pretreatment gas flows into the posttreatment device housing 131. As shown in FIGS. 6 to 8 and 16, the pretreatment gas inflow portion 1312 is formed at one side of the lower portion of the posttreatment device housing 131, and the pretreatment gas is introduced through the pretreatment gas inflow portion 1312. The gas moves upward along the cylindrical flow path formed by the inner wall 1311.

The post-treatment gas outlet 1313 is a portion where the post-treatment gas, which is the pre-treatment gas from which the harmful substances have been additionally removed by the post-treatment device 13, is discharged. As shown in FIGS. 6 to 8 and 16, the post-treatment gas outlet 1313 is formed on the top of the post-treatment device housing 131, and the post-treatment gas discharged through the post-treatment gas outlet 1313 is The harmful substances are removed from the exhaust gas by the pre-treatment device 11 and the post-treatment device 13 and can be released to the atmosphere.

The cleaning liquid inflow portion 1314 is a portion into which the cleaning liquid to be jetted from the inside of the post-treatment device 13 flows. As can be seen from FIGS. 6 and 16, the cleaning liquid inflow portion 1314 is connected or formed to a first post-treatment injection unit 135, a second post-treatment injection unit 136, and a cleaning unit 138, which will be described later.

The cleaning solution outflow portion 1315 is provided with the first post-treatment injection means 135 or the second post-treatment injection means 135 for removing harmful substances in the pre-treatment gas flowing into the post-treatment housing 131 through the pre-treatment gas inflow portion 1312. This is a part where the cleaning liquid sprayed by the processing spraying means 136 is discharged. As can be seen from FIGS. 6 to 8 and 16, the cleaning liquid outlet 1315 is formed at the lower end of the post-treatment device housing 131. The cleaning liquid sprayed by the second post-processing spraying unit 136 collects harmful substances in the pre-processing gas, moves to the lower end of the post-processing device housing 131, and can be discharged to the outside. In order to smoothly discharge the cleaning liquid, the lower end of the post-treatment device housing 131 is preferably formed so as to converge toward the cleaning liquid outflow portion 1315.

The diffusing unit 132 is a portion of the inside of the post-treatment device housing 131, which is disposed adjacent to the pre-treatment gas inflow portion 1312 and diffuses the pre-treatment gas flowing through the pre-treatment gas inflow portion 1312. Referring to FIGS. 17 to 19, the diffusing means 132 is disposed in front of the pretreatment gas inflow portion 1312 in a spaced manner, but includes a body 1321 and a fastening portion 1322.

The body 1321 is a member that is disposed while covering the front of the pretreatment gas inflow portion 1312 and has a diffusion portion 1321a through which the pretreatment gas can pass. The body 1321 may be formed of a plate member. As shown in FIGS. 18 and 19, the body 1321 is generally formed to vertically cover the front of the pretreatment gas inflow portion 1312, and the upper and lower ends of the body 1321 have the pretreatment gas. It may be inclined or bent toward the inflow portion 1312.

More specifically, the upper end of the body 1321 is inclined upward toward the pretreatment gas inflow portion 1312, and the lower end of the body 1321 is inclined downward toward the pretreatment gas inflow portion 1312. ing. Through this shape of the body 1321, the pretreatment gas flowing through the pretreatment gas inflow portion 1312 can be uniformly diffused in the front and upper portions. The body 1321 may be formed in a bent shape as a whole instead of being inclined or bent only in the upper and lower ends.

The diffusion part 1321a may include a plurality of through holes, but the diffusion part 1321a may be formed of a plurality of uniformly formed through holes. However, the diffusing portion 1321a is not limited to the through hole, and the diffusing portion 1321a may have a shape such as a slit.

The area and shape of the body 1321 and the size and shape of the diffusion unit 1321a and the number of the diffusion units 1321a may be changed according to the processing capacity of the post-processing device 13.

The fastening portion 1322 is a portion that allows the diffusing means 132 to be fixed inside the post-treatment housing 131 by being fastened to the fixing portion 1311b formed inside the post-treatment housing 131. .. Referring to FIGS. 17 and 18, the fastening portion 1322 is formed by vertically extending or bending the right and left ends of the body 1321 toward the pretreatment gas inflow portion 1312. Thus, the diffusing means 132 can be fixed inside the post-treatment device housing 131 by being fastened to the fixing portion 1311b formed inside the post-treatment device housing 131.

Since the flow path of the pretreatment gas, which is the exhaust gas in which the harmful substances are temporarily reduced by the pretreatment device 11, is changed to the spiral shape by the stirring means 113, the pretreatment gas outflows. It also has a certain amount of rotational energy when flowing out to the portion 1312, passing through the connecting portion 12 and flowing into the pretreatment gas inflow portion 1312. Therefore, while entering the inside of the post-treatment device housing 131, the flow is concentrated on the side of the pre-treatment gas inflow portion 1312 of the inner wall 1311 of the post-treatment device housing 131. It cannot be uniformly dispersed in the flow path of the pretreatment gas formed inside the.

The diffusion unit 132 functions as a nozzle by reducing a cross-sectional area of the pretreatment gas when the pretreatment gas flows into the posttreatment device housing 131. It is possible to uniformly diffuse the light inside the housing 131. Through this, the pretreatment gas can be evenly distributed on the pretreatment gas flow path formed inside the posttreatment device housing 131. That is, the pretreatment gas flowing into the packing 133 through the diffusing means 132 is evenly dispersed so that the SOx absorption efficiency of the pretreatment gas in the packing 133 is increased, and other harmful substances are trapped. The collection efficiency can also be improved.

Meanwhile, as shown in FIGS. 17 and 18, two diffusion units 132 are continuously arranged in front of the pretreatment gas inflow portion 1312. Through this, diffusion by the diffusion unit 132 is more uniform. You can

The packing 133 is a portion for increasing the contact area between the cleaning liquid and the pretreatment gas ejected by the first post-treatment injection unit 135 and the second post-treatment injection unit 136, which will be described later. The packing 133 is disposed inside the post-treatment device housing 131, above the diffusion means 132, and on the flow path of the pre-treatment gas to increase the gas/liquid contact area between the pre-treatment gas and the cleaning liquid. As a result, SOx, which is a harmful substance in the pretreatment gas, can be smoothly dissolved through a cleaning liquid composed of seawater or fresh water containing an alkaline additive.

The packing 133 has a structure in which a large number of fillers are gathered, and the filler may be made of steel, ceramic, plastic material, or the like. In addition, the packing 133 may be a random packing in which the filler is gathered without a fixed pattern, a structured packing having a fixed pattern, or the like. The type and shape of the packing 133 can be changed according to the processing capacity and length design of the post-processing device 13.

The packing support means 134 is a part that supports the packing 133 from below and diffuses the pretreatment gas. Referring to FIGS. 20 and 21, the packing support means 134 covers the flow path of the pretreatment gas, and the edge portion of the step support portion 1311a is formed on the inner wall 1311 of the posttreatment device housing 131 so as to project inward. Seat and support the packing 133 placed on top. In the present invention, the packing support means 134 has a diffusion function of diffusing the pretreatment gas under the packing 133.

The packing support means 134 includes a through part 134a formed to allow the pretreatment gas to pass therethrough and a support part 134b for supporting the packing. Specifically, the support part 134a is a strand having an intersecting structure, and the penetrating part 134a is formed of a through hole formed by the support part 134b. That is, the packing supporting means 134 forms a mesh-shaped penetrating part 134a by a supporting part 134b having an intersecting structure. By reducing the resistance through the mesh structure, the pressure loss of the pretreatment gas can be reduced.

The packing supporting means 134 increases the ratio of the diffusion part 134a, that is, the ratio of the through holes of the mesh structure to increase the passage area of the pretreatment gas as compared with a general mesh structure to increase the pressure of the pretreatment gas. It is preferable to minimize the loss, but specifically, it is preferable that the area of the diffusion part 134a and the vertical projected area of the support part 134b are formed to be about 2 to 4:1.

On the other hand, as shown in FIG. 20, it is preferable that at least a part of the supporting portion 134b has a twisted structure. When the support part 134b has such a twisted structure, the pretreatment gas that comes into contact with the support part 134b among the pretreatment gas that passes through the penetrating part 134a travels along the twisted direction. You will change direction. As a result, the pretreatment gas can be diffused in a wider area, and the more uniform and active pretreatment gas can be dispersed and diffused.

In the present invention, the packing support means 134 does not merely support the packing 133, but the pretreatment gas flowing into the packing 133 is evenly distributed over the entire lower area of the packing 133. As a result, the SOx absorption efficiency of the pretreatment gas in the packing 133 can be increased through the packing support means 134, and the collection efficiency of other harmful substances can also be improved.

On the other hand, it is preferable that the packing supporting means 134 has a bending structure in which a peak portion 1341 and a valley portion 1342 are continuously arranged and connected. The bending structure in which the packing structures 133 are continuously connected side by side improves the cross-sectional area relative supporting force, so that the packing 133 can be more stably supported by the crests 1341. In general, such a structure allows the pressure of the pretreatment gas advancing toward the packing 133 to be uniformly dispersed in the packing support means 134, so that the packing 133 is directed toward the packing 133 from the lower portion thereof. The flowing pretreatment gas is uniformly dispersed under the packing 133.

The first post-treatment injection unit 135 is a part of the inside of the post-treatment device housing 131, which is disposed on the flow path of the pre-treatment gas and injects the cleaning liquid toward the pre-treatment gas. The first post-treatment spraying unit 135 is disposed above the packing 133 and sprays the cleaning liquid toward the packing 133.

Referring to FIG. 16, FIG. 22 and FIG. 23, in one embodiment of the present invention, the first post-treatment injection means 135 is branched from the injection body 1351 of a rod shape side by side at regular intervals from the injection body 1351. It includes a plurality of jetting units 1352 and a plurality of jetting ports 1353 formed at regular intervals in each jetting unit 1352, and supplies the cleaning liquid and compressed air to each jetting unit 1352 through the jet body 1351. A cleaning liquid supply unit (not shown) may be further included. The cleaning liquid and the compressed air supplied by the cleaning liquid supply unit (not shown) are supplied to the injection body 1351 through the cleaning liquid inflow portion 1314. The jet body 1351 receives the cleaning liquid together with compressed air and transmits the cleaning liquid to each of the jetting bases 1352, and the injection port 1353 jets the cleaning liquid toward the exhaust gas.

The specific form and arrangement of the first post-treatment injection unit 135 may be changed according to the injection capacity of the first post-treatment injection unit 135 and the overall length design of the post-treatment device 13.

The second post-treatment injection means 136 is disposed on the flow path of the pre-treatment gas in the interior of the post-treatment device housing 131 to inject the cleaning liquid toward the pre-treatment gas, and the first post-treatment injection means 136. It is characterized in that it operates independently of the processing injection means 135. Such an independent operation can be performed by the control of the control unit C as shown in FIG. The control unit C controls the first post-treatment injection unit 135 and the second post-treatment injection unit 136 so that the cleaning liquid can be ejected independently.

Referring to FIG. 16, FIG. 22 and FIG. 23, in the exemplary embodiment of the present invention, the second post-treatment injection means 136 includes a rod-shaped injection body 1361 and a branch from the injection body 1361 at regular intervals. A plurality of jetting units 1362, and a plurality of jetting ports 1363 formed at regular intervals in each of the jetting units 1362, and supplies a cleaning liquid and compressed air to each of the jetting units 1362 through the jet body 1361. A cleaning liquid supplying unit (not shown) may be further included. The cleaning liquid and the compressed air supplied by the cleaning liquid supply means (not shown) are supplied to the injection body 1361 through the cleaning liquid inflow portion 1314. The injection body 1361 receives the cleaning liquid together with compressed air and transmits the cleaning liquid to each of the injection tables 1362, and the injection port 1363 injects the cleaning liquid toward the exhaust gas.

The specific form and arrangement of the second post-treatment injection means 136 are the same as those described in connection with the first post-treatment injection means 135, and the injection capacity and the post-treatment of the second post-treatment injection means 136. It may vary depending on the overall length design of the container 13.

The fact that the second post-treatment injection means 136 operates independently of the first post-treatment injection means 135 means that the second post-treatment injection means 136 selectively operates with the first post-treatment injection means 135, or This means that the cleaning liquid can be sprayed at the same time. Therefore, when the amount of the exhaust gas generated by combustion and the amount of the pretreatment gas flowing from the pretreatment unit 11 changes due to the load of the engine, it is possible to appropriately inject the cleaning liquid correspondingly. As a result, economical operation of the post-treatment device 13 can be achieved.

The second post-treatment jetting means 136 is disposed above the first post-treatment jetting means 135 with a predetermined space. When the second post-treatment injection unit 136 and the first post-treatment injection unit 135 are arranged on the same horizontal plane in the flow path of the pre-treatment gas, the resistance that disturbs the flow of the pre-treatment gas is large. Therefore, it is preferable that the second post-treatment jetting means 136 and the first post-treatment jetting means 135 are arranged at different heights.

Further, the first post-treatment injection means 135 and the second post-treatment injection means 136 are arranged at different heights and intersect each other when vertically projected onto the flow path of the pretreatment gas. More preferably, they are arranged. Through such an arrangement, the cleaning liquid can be uniformly sprayed onto the pretreatment gas on the pretreatment gas flow path without a blind spot region, and the harmful substances in the pretreatment gas can be removed more efficiently.

Here, a mechanism of removing harmful substances in the pretreatment gas through the cleaning liquid ejected by the first posttreatment injection unit 135 and the second posttreatment injection unit 136 will be described as follows.

The pretreatment gas contains harmful substances such as sulfate (SOx) which is an acidic substance and PM. The first post-treatment injection means 135 and the second post-treatment injection means 136 neutralize the harmful substances. Or, a cleaning liquid is sprayed to aggregate and remove. Generally, PM of 0.1 to 0.5 μm is first aggregated by fine water droplets (100 to 200 μm) to increase the size. In addition, a basic washing solution is required to neutralize the acidic sulfate (SOx), but when fresh water is used, a separate alkaline additive is added to induce the neutralization reaction.

At this time, the alkaline additive may be NaOH (sodium hydroxide), Na ₂ CO ₃ (sodium carbonate), NaHCO ₃ (medium sodium carbonate), or the like. The neutralization reaction of the sulfate (SOx) by the cleaning solution containing NaOH is as follows.

SO _2(g) +2NaOH _(aq) +(1/2)O _2(g) → 2Na ⁺ +SO ₄ ^2- +H ₂ O

However, as described above, when the present invention is applied to a ship, sea water, which is salt water, can be used as the cleaning liquid. Generally, seawater contains salts such as sodium chloride (NaCl), magnesium chloride (MgCl ₂ ), and potassium chloride (KCl), but anions such as Cl ⁻ , SO ₄ ²⁻ , Br ^{− and the} like formed by dissolution of these salts. As a result, the pH becomes weakly basic with about 7.8 to 8.3. Therefore, when such seawater is used as the cleaning liquid, there is an advantage that the sulfate (SOx) can be neutralized without adding a separate alkaline additive.

At this time, the neutralization reaction formula with seawater is as follows, but first, it is mixed with gaseous sulfur dioxide (SO ₂ ) water.

SO _2(g) +H ₂ O _(l) ←→ H ₂ SO _3(aq)

It then reacts with the base in seawater, which is as follows.

_{2H 2 SO 3 (aq) +} OH - ← → 2HSO 3 - (aq) + H + (aq) + H 2 O (aq)

^{_{2HSO 3 - (aq) + OH}} - (aq) ← → 2SO 3 2- (aq) + H + (aq) + H 2 O (aq)

That is, sulfur dioxide is absorbed by seawater and undergoes the above reaction to form a sulfate.

The air/water separating unit 137 is disposed above the second post-treatment injection unit 136 in the post-treatment device housing 131, and passes through the second post-treatment injection unit 136 to flow the pre-treatment gas. It is a part that performs the role of separating fine liquid droplets that flow. The air/water separating means 137 is arranged in such a manner that its edge portion is seated on a step portion 1311a formed on the inner wall 1311 of the post-treatment device housing 131 so as to project inward.

The air/water separator 137 separates, filters, and collects aerosol-shaped droplets or mist generated by the pretreatment gas and the cleaning liquid, and has a zigzag vertical cross section. It can be configured in such a manner that a large number of blades appearing at are arranged at regular intervals. In addition, the specific form of the air/water separator 137 can be changed depending on the design of the post-treatment device 13, temperature, chemical characteristics, and the like.

The cleaning unit 138 is disposed inside the post-treatment device housing 131, above the second post-treatment injection unit 136 and below the steam separation unit 137, and supplies the cleaning liquid toward the steam separation unit 137. This is the part to be jetted.

Referring to FIG. 16, FIG. 24, and FIG. 25, in one embodiment of the present invention, the cleaning unit 138 includes a rod-shaped injection body 1381 and a plurality of branching bodies branching from the injection body 1381 at regular intervals. Cleaning unit 1382 and a plurality of spray holes 1383 formed at regular intervals in each of the spray units 1382, and a cleaning liquid supply unit for supplying cleaning liquid and compressed air to each of the injection units 1382 through the injection body 1381. It may further include (not shown). The cleaning liquid and compressed air supplied by the cleaning liquid supply unit (not shown) are supplied to the injection body 1381 through the cleaning liquid inflow portion 1314. The jet body 1381 is supplied with the cleaning liquid together with the compressed air and transmits the cleaning liquid to each of the jetting tables 1382, and the jet port 1383 jets the cleaning liquid toward the vapor-water separating means 137.

The air/water separator 136 may be contaminated or clogged in the process of separating, filtering, and collecting fine droplets or mists in a state where harmful substances such as PM in the pretreatment gas are collected. The means 138 prevents the steam/water separator 137 from being contaminated and blocked by cleaning the steam/water separator 137 with a cleaning liquid.

In addition, the cleaning unit 138 sprays a cleaning liquid to increase the size of the fine droplets or mist separated by the steam separation unit 137, so that fine droplets that collect harmful substances or large droplets of mist can be obtained. As a result, it can be efficiently dropped to the lower portion of the post-treatment device housing 131 or can be flowed to the lower portion on the inner wall 1311 of the post-treatment device housing 131.

The water drop blocker 139 is a part that blocks a water drop that rises through the inner wall 1311 of the post-treatment device housing 131 and flows out to the post-treatment gas outlet 1313. Referring to FIGS. 16, 26 and 27, the water drop blocking means 139 includes a blocking wall 1391. Further, the water drop blocking means 139 forms a collecting space 1392 for collecting water drops near the post-treatment gas outflow portion 1313 to prevent the water drops from flowing out. The collecting space 1392 is formed so that the collected water droplets can drop downward.

The post-treatment gas outflow portion 1313 is formed on the top of the post-treatment device housing 131 in an upward direction, and the water drop blocking means 139 extends downward from the edge of the post-treatment gas outflow portion 1313. 1391 is included. The blocking wall 1391 forms a collecting space 1392 between the upper inner wall of the housing 131 of the post-treatment device. The upper end inner wall 1311 of the housing 131 of the post-treatment unit is formed in a sloped shape so as to converge toward the post-treatment gas outflow portion, but the blocking wall 1391 efficiently forms the collection space 1392. It is preferable that the liquid crystal display device is characterized in that it is extended vertically downward in order to efficiently block external discharge of droplets.

The pre-treatment gas rises along the flow path of the pre-treatment gas formed inside the post-treatment device 13, becomes a post-treatment gas while additionally removing harmful substances, and becomes the post-treatment gas outlet. It is discharged to the outside through 1313. In this process, some of the water droplets of the cleaning liquid that collects harmful substances in the pretreatment gas ride on the inner wall 1311 of the posttreatment device housing 131 and rise toward the posttreatment device outflow portion 1313. To move.

The water droplets that have traveled to the upper end inner wall 1311 of the post-treatment device housing 131 and have moved to the vicinity of the edge of the post-treatment gas outflow portion 1313 are applied to the blocking wall 1391. In addition, a collection space 1392 is formed between the blocking wall 1391 and the inner wall 1311 of the post-treatment device housing 131 around the post-treatment gas outlet 1313, so that a collection space 1392 is formed to allow water droplets to aggregate with each other. In the space 1392, water droplets are aggregated to increase their size and weight so that they can be dropped to the lower portion of the post-treatment device housing 131.

As described above, the water drop blocking unit 139 blocks water drops trapping harmful substances in the pretreatment gas from being discharged to the outside through the posttreatment device outflow portion 1313, and is disposed at a lower portion of the posttreatment device housing 131. Let it fall apart.

Next, the exhaust gas treatment device 1b according to the second embodiment will be described.

Referring to FIG. 28, the exhaust gas emitted from the engine or the boiler is a second embodiment while containing harmful substances such as sulfate (SOx), nitric oxide (NOx), and particulate matter (Particular Matter, hereinafter PM). According to the second embodiment, the exhaust gas treatment apparatus 1b according to the second embodiment may include a housing 171 in which a number of means for reducing the harmful substances are gradually provided.

Referring to FIGS. 29 and 30, the housing 171 may have various shapes in the shape of a large hollow cylinder, but generally, the housing 171 is generally cylindrical, but the housing 171 has an external appearance. The inner wall surface 1711 may include a gas inflow portion 1712 at which an exhaust gas enters and a cleaning liquid outflow portion 1715 at which an injected cleaning liquid exits and a gas outflow portion 1713 at which an exhaust gas exits at an upper portion.

The inner wall surface 1711 may include a vertical surface 1711a that extends straight up and down, and an inclined surface 1711b that is formed by extending from the vertical surface 1711a in the vicinity of the gas outflow portion 1713 and extending. The wall surface 1711 may have a function of climbing along with the flow of the exhaust gas by the cleaning liquid that has flowed in from the injection unit 173 described later.

The gas inflow part 1712 may include a gas inflow pipe 1712a that protrudes inward of the housing 171 and communicates with one side of a diffusing unit 172, which will be described later. It has a hollow cylindrical shape and functions as a passage through which exhaust gas can flow.

The cleaning liquid outflow portion 1715 is a portion where the cleaning liquid descended while cleaning harmful substances is discharged to the outside of the housing 171, and the cleaning liquid outflow is formed by extending a certain length from one side of the bottom surface of the housing 171 to a lower portion. A tube 1715a can be included, but is often formed in a hollow cylindrical shape with an empty inside for draining the cleaning liquid. When installed on a ship, due to the rolling phenomenon that the hull leans to the left and right and the pitching phenomenon that leans to the front and back, there is no separate bottom tilt, and the smoothing of the cleaning liquid accumulated on one side due to the tilt of the vessel Can be discharged.

The gas outflow portion 1713 is a portion where the clean gas from which harmful substances have been removed is discharged into the atmosphere in the exhaust gas treatment device 1b according to the second embodiment, and has a large hole so that the clean gas can be discharged. However, it is also possible to block water drops rising on the inner wall surface 1711 by communicating with water drop blocking means 178 described later.

Next, referring to FIGS. 29 to 58, the exhaust gas that has flowed into the housing 171 of the exhaust gas treatment apparatus 1b is washed in stages to finally remove sulfate (SOx) and particulate matter (PM). Various means for discharging the removed clean gas will be described.

First, referring to FIGS. 29 and 30, a schematic description will be given of the exhaust gas treatment device 1b, which is located above the gas inflow portion 1712 and has a diffusion means 172 for evenly distributing the exhaust gas inside the housing 171. An injection means 173 for injecting the cleaning liquid on the upper side thereof, a distribution means 174 for spreading the exhaust gas on the upper side of the injection means 173, a multi-injection means 175 having a plurality of injection means arranged in parallel thereon, and a multi-injection means 175. On the top, water drop separating means 176 for guiding a spiral flow of exhaust gas, water drop collecting means 177 for collecting water drops separated at the lower part of the water drop separating means 176, and an inner wall surface 1711 near the gas outflow portion 1713. Water drop blocking means 178 may be included to drop water drops that ride on the vehicle.

Referring to FIGS. 31 to 34, the diffusion unit 172 has a function of evenly distributing the exhaust gas flowing from the gas inflow portion 1712 into the housing 171, but the upper wide lower narrow shape becomes wider as it goes upward. Gas diffuser 1721 and a discharge passage 1722 for discharging the cleaning liquid accumulated inside the gas diffuser 1721 without obstructing the flow of exhaust gas.

Referring to FIG. 31 and FIG. 32, the gas diffuser 1721 is configured to have a thin upper wide lower narrow shape with an empty inside, and includes an inner side surface 1721a, an outer side surface 1721b, and two surfaces (1721a, b). A blocking part 11721d may be formed to extend to the outside of the gas diffuser 1721 along the boundary edge part 1721 and the outer surface 1721b.

The outer surface 1721b has a function of riding up exhaust gas entering through the gas inflow portion 1712 and widely dispersing the exhaust gas inside the housing 171.

In the prior art, a gas diffuser was often provided on the upper side of the gas inflow portion, but the cleaning liquid falling with a narrow wide upper narrow shape in which the width becomes narrower as it goes upwards It obstructed the flow of exhaust gas while flowing along the surface. Then, this causes a pressure loss of the exhaust gas, which weakens the overall function of the exhaust gas processing device. In addition, although the lower wide upper narrow shape often has a shape of a triangular pyramid or a cone, the exhaust gas flowing from the gas inflow portion bypasses the lower surface of the cone and then detours and spreads widely inside the housing. It also caused a large pressure drop as it formed a rising flow. Although the exhaust gas treatment device is an important item because it is used as an index indicating performance by numerically expressing how much pressure loss per unit height (mmAq/m), the conventional technology is Due to the gas diffuser having the above structure, the pressure loss was enormous.

Therefore, the gas diffuser 1721 according to the present invention includes a shape that becomes wider as it goes upward, and as the exhaust gas entering through the gas inflow part 1712 gradually widens along the outer surface 1721b of the gas diffuser 1721, it naturally becomes. By ascending, exhaust gas can be widely dispersed inside the housing 171 without pressure loss. In particular, it is preferable that the gas diffuser 1721 having an upper wide lower narrow shape includes an inverted conical shape.

The inner surface 1721a has a function of collecting and flowing down the cleaning liquid injected from the injection unit 173, which will be described later, and collecting the cleaning liquid below. As a result, the flow of the exhaust gas rising along the outer surface 1721b of the gas diffuser 1721. Since it does not interfere with the pressure loss can be prevented.

The blocking portion 1721d is configured to be extended outward along the outer surface 1721b and is located below the edge portion 1721c, but is vertically extended from the first surface 172d-1. Can include a second surface 1721d-2 deployed to

Referring to FIG. 33, it is possible to confirm a pitching phenomenon in which the exhaust gas treatment device 1b is used in a ship and the hull tilts forward and backward due to waves, and a rolling phenomenon in which the hull tilts left and right due to a curve or the like. At this time, the housing 171 is also tilted forward, backward, leftward and rightward, but at this moment, if the gas diffuser 1721 is also tilted and the outer surface 1721b moves vertically or more, the cleaning liquid sprayed from the spraying means 173 described later is injected into the gas inflow part. May enter 1712. As described above, when the cleaning liquid that has entered the gas inflow portion 1712 flows back and reaches the engine E and the boiler B, there is a possibility that a serious situation such as equipment failure may be induced. Therefore, in order to prevent such a phenomenon, the blocking unit 1721d should be designed in consideration of the size of the ship, rolling, pitching angle, and the like. More specifically, by changing the length of the first surface 1721d-1 and the length of the first surface 1721d-2, the cleaning liquid can be adjusted even when the hull is tilted by adjusting the degree of protrusion from the outer surface 1721b to the outside. From flowing back into the gas inflow portion 1712. At this time, it is preferable that the outer surface 1721b is designed in consideration of rolling angle, pitching and the like.

In addition, when the rolling and pitching occur, the cleaning liquid accumulated in the blocking portion 1721d may be spilled to the bottom of the housing 171 other than the gas inflow portion 1712. To this end, the deployment angle of the second surface 1721d-2 is designed in consideration of rolling and pitching.

The discharge passage 1722 has a function of discharging the cleaning liquid collected on the inner surface 1721a of the gas diffuser 1721 to the bottom surface of the housing 171 to prevent the cleaning liquid from overflowing. The lower side is formed so as to communicate with the inner side surface 1721a. At this time, the gas inlet part 1712 of the discharge passage 1722 is extended to the inside of the housing 171 and extended to the inside of the extended gas inlet pipe 1712a. An outlet 1722a may be included in communication with the side surface. In this case, since the exhaust port 1722a is formed on one side of the gas inflow pipe 1712a, the exhaust passage 1722 extends from the lower side of the gas diffuser 1721 to the inner surface of the gas inflow pipe 1712a. To be done.

The cleaning liquid discharged from the discharge passage 1722 is collected on the bottom surface of the housing 171, and the cleaning liquid collected there is exhaust gas treated through a cleaning liquid outlet 1715 extending from one side of the bottom of the housing 171 to a predetermined angle. It is discharged to the outside of the device 1b. At this time, the cleaning liquid outflow portion 1715 is formed only on one side, and even if there is no additional inclined surface on the bottom surface of the housing 171, the hull is tilted back and forth due to waves and acceleration/deceleration during the operation of the ship. Since the entire housing 171 is tilted due to a rolling phenomenon in which the hull leans to the left or right due to a phenomenon or rotation, it is possible to smoothly discharge the cleaning liquid and prevent excessive accumulation on the bottom surface. it can. In this way, the state in which the housing 171 is tilted can be confirmed in more detail in FIG.

Referring to FIG. 34, since the cleaning liquid collected on the inner surface 1721a of the gas diffuser 1721 does not affect the flow of the exhaust gas passing through the gas inflow pipe 1712a, the pressure loss is prevented. While falling (portion indicated by dotted line), the exhaust gas can be confirmed to be naturally dispersed (portion indicated by solid line) inside the housing 171 without pressure loss due to the structure.

Referring to FIGS. 35 to 38, the injection unit 173 has a function of injecting the cleaning liquid from the upper side of the diffusion unit 172 and cleaning the exhaust gas containing sulfate (SOx) and PM. One or more side injection means 1731 for injecting from the side surface in the gas flow direction may be included.

Referring to FIG. 35, the lateral injection unit 1731 may include an injection body 1731a and an injection port 1731b in a configuration for injecting a cleaning liquid into exhaust gas.

The injection body 1731a is a rod-shaped supply pipe for supplying the cleaning liquid, and is connected to the inner wall surface 1711 of the housing 171. When the housing 171 has a cylindrical shape, the injection body 1731a can be distributed in a circular shape. If it is located in a space that is formed to a certain depth outside the inner wall 1711, the injection means 1731 itself can block the flow of exhaust gas and prevent pressure loss due to the structure.

The injection port 1731b is formed at one end of the injection body 1731a to inject the cleaning liquid, but is formed toward the side surface to inject the cleaning liquid to the side surface.

Exhaust gas generated by combustion inside the engine E or the boiler B contains harmful substances such as sulfate (SOx) and PM which are acidic substances, and the injection means 173 neutralizes or agglomerates such harmful substances. And spray a cleaning liquid to remove it. Generally, PM of 0.1 to 0.5 μm is first aggregated by fine water droplets (100 to 200 μm) to increase the size. Further, a basic washing solution is required to neutralize the acidic sulfate (SOx), but when using fresh water, a separate alkaline additive is added to induce a neutralization reaction.

At this time, the alkaline additive may be NaOH (sodium hydroxide), Na ₂ CO ₃ (sodium carbonate), NaHCO ₃ (medium sodium carbonate), or the like. The neutralization reaction of the sulfate (SOx) by the cleaning solution containing NaOH is as follows.

SO _2(g) +2NaOH _(aq) +(1/2)O _2(g) → 2Na ⁺ +SO 4 ^2- +H ₂ O

However, when the exhaust gas treatment device 1b is installed in a ship operating at sea, sea water that is salt water can be used. Generally, seawater contains salts such as sodium chloride (NaCl), magnesium chloride (MgCl ₂ ), and potassium chloride (KCl), but anions such as Cl ⁻ , SO ₄ ²⁻ , Br ^{− and the} like formed by dissolution of these salts. As a result, it becomes weakly basic with a pH of about 7.8 to 8.3. Therefore, when such seawater is used as the cleaning liquid, there is an advantage that the sulfate (SOx) can be neutralized without adding a separate alkaline additive.

At this time, the neutralization reaction formula with seawater is as follows, but first, it is mixed with gaseous sulfur dioxide (SO ₂ ) water.

SO _2(g) +H ₂ O _(l) ←→ H ₂ SO _3(aq)

It then reacts with the base in seawater, which is as follows.

_{2H 2 SO 3 (aq) +} OH - ← → 2HSO 3 (aq) + H + (aq) + H 2 O (aq)

^{_{2HSO 3 (aq) + OH -}} (aq) ← → 2SO 3 2- (aq) + H + (aq) + H 2 O (aq)

That is, sulfur dioxide is absorbed by seawater and undergoes the above reaction to form a sulfate.

The spraying means sprays two fluids further containing compressed air in addition to the cleaning liquid composed of seawater or fresh water, so that the cleaning liquid is widely dispersed in the housing 171 and the area in contact with the exhaust gas is enlarged to increase the cleaning efficiency. Can be improved.

Further, the cleaning liquid and the compressed air may have a function of cooling the exhaust gas itself by lowering the temperature thereof, in addition to cleaning harmful substances such as sulfate (SOx) or PM in the exhaust gas. Generally, the exhaust gas generated as a by-product of combustion in the engine E and the boiler B is a high-temperature gas whose temperature is about 250 to 300 degrees at the time of flowing into the housing 171. If such a high-temperature exhaust gas is released into the atmosphere as it is, many problems may occur, and various components in the housing 171 may suffer heat damage (heat injury), so that the cleaning liquid evaporates quickly and is cleaned. Work may be hindered. Further, in a high temperature state, even if the cleaning liquid is sprayed, PM may not aggregate and may pass through as it is. Accordingly, the injection means 173 injects two fluids, which are a mixture of seawater or freshwater and compressed air, into the high temperature exhaust gas that has entered the housing 171 through the gas inflow portion 1712 and cools the temperature to about 50 to 60 degrees. Have the function to

The above-mentioned function of the injection means 173 works more effectively only when the contact area with the exhaust gas and the contact time are increased, but the injection means of the conventional exhaust gas treatment device ensures that the cleaning liquid matches the flow direction of the exhaust gas. Inevitably, the contact area was narrowed by spraying on, and the contact time was short. Therefore, there is a problem that the cleaning work and the cooling work cannot be effectively performed.

Also, the exhaust gas treatment device that cleans and cools sulfates (SOx) and PM has a very long shape, such as over 5 m above and below, but it is large when installed in a power station on the ground. Even if it is not a problem, when it is installed in a ship, it has a large volume, which limits the design of the ship and impairs its aesthetics. However, the injection means according to the conventional technique has a problem that the exhaust gas treatment device itself has to be made longer in order to inject the cleaning liquid in parallel with the exhaust gas flow direction to secure a sufficient contact area.

In many cases, the injection means injects the cleaning liquid from the top to the bottom so as to run counter to the flow of the exhaust gas, but in this case, the flow of the exhaust gas is obstructed from the front, causing a huge pressure loss. As described above, the pressure loss degree of the exhaust gas treatment device is a numerical value (mmAq/m unit) and is used as an index showing its performance, which is an important matter, but the conventional technique has many problems. ..

However, as can be seen from FIGS. 35 to 37, the exhaust gas treatment device 1b includes a lateral injection means 1731 inside the housing 171 to inject the cleaning liquid and compressed air from the side of the flow of the exhaust gas. Even if the length of the housing 171 is not increased, a sufficient contact area and contact time between the exhaust gas and the cleaning liquid are ensured, and the sulphate (SOx) neutralization reaction, PM aggregation, and the exhaust gas cooling reaction are smoothly performed. To occur. Particularly, if the cleaning liquid is installed below the inclined portion 1741 of the distribution means 174, the cleaning liquid is injected to the point where the vortex flow is generated, so that the exhaust gas and the cleaning liquid can be actively mixed. In addition, when the temperature is lowered by such cooling, the air contracts, so that the volume decreases and the PM particles relatively aggregate and increase. Further, since the force is applied from the side surface, there is an advantage that no pressure loss occurs in the flow direction of the exhaust gas. It is preferable to inject the exhaust gas perpendicularly to the flowing direction.

Further, referring to FIG. 38, the two fluids of the cleaning liquid and the compressed air may be distributed in a conical shape to maximize the contact area and the contact time with the exhaust gas to increase the work efficiency.

Referring to FIGS. 39 to 42, the distribution unit 174 is located above the injection unit 173, but is formed in a mesh structure including a large number of small through holes 174a, and a slanted portion inclined to one side. 1741 and a guide portion 1742 extending downward from the lower side of the inclined portion 1741.

Referring to FIG. 39 and FIG. 40, the inclined portion 1741 has a shape of an upper wide portion and a lower portion that are expanded in diameter toward the upper side, but this is because the flow of exhaust gas is drawn to the center and the lower side of the inclined portion 1741. To form a swirl flow and mix with the cleaning liquid.

The exhaust gas treatment device 1b must be uniformly dispersed in the housing 171 to increase the contact area and the contact time for effective reaction of the cleaning liquid and the exhaust gas. The gas tends to rise unevenly toward the inner wall surface 1711 side of the housing 171 due to the influence of the inverted conical gas diffuser 1721. Therefore, in order to keep the upward flow of the exhaust gas deflected to the inner wall surface 1711 side in the center, a large number of small through-holes 174a are included, and as a whole, it is configured to become wider toward the upper side. With such a configuration, the exhaust gas deflected by the inner wall surface 1711 of the housing 171 and rising is refracted inward while passing through a large number of through holes 174a inclined downward toward the center, and the flow is dispersed in the center. In addition, a part of the exhaust gas flow that could not rise through the through hole 174a collides with the lower surface of the inclined portion 1741 and circulates downward to form a swirl flow (vortex flow) to mix the cleaning liquid and the exhaust gas. As a result, a neutralization reaction of sulfate (SOx) and an agglomeration reaction of PM actively occur to further improve the cleaning effect.

Referring to FIG. 39 and FIG. 41, the guide part 1742 has a large hole at the center thereof, which is an inflow hole 1742a, and has a hollow interior so that a large amount of exhaust gas can pass through.

The above-described inclined portion 1741 itself has a certain effect of pulling the exhaust gas flow on the inner wall surface 1711 side to the center, but includes a large inflow hole 1742a in the center for more reliable function execution. With such a configuration, the exhaust gas circulated while being swirled by the inclined portion 1741 is uniformly distributed to the center side to increase cleaning efficiency. In addition, the vertically formed guide portion 1742 guides the flow of the exhaust gas so that such a distribution effect can be more effectively generated. Such exhaust gas flow can be confirmed in FIG.

43 to 46, the multiple injection means 175 is located above the distribution means 174, and a plurality of injection means are vertically arranged.

Referring to FIG. 44, the multiple injection unit 175 may include a first injection unit 1751, a second injection unit 1752, and a third injection unit 1753.

Referring to FIG. 45, the first injection means 1751 includes a rod-shaped injection body 1751a, a plurality of injection bases 1751b branched from the injection body 1751a side by side at regular intervals, and fixed to each of the injection bases 1751b. It may include a large number of injection ports 1751c formed at intervals.

The injection body 1751a is a supply pipe for supplying a cleaning liquid from the outside, and is connected to the inner wall surface 1711 of the housing 171.

The injection table 1751b is branched from the injection body 1751a and is configured to inject the cleaning liquid into a wider space. The injection table 1751b is disposed differently from the injection table 1752b of the second injection unit 1752 and is different from the exhaust gas. The contact area can be maximized. Further, it is possible to prevent the harmful substances from being released into the atmosphere as they are by eliminating the dead zone of the exhaust gas.

A plurality of the injection ports 1751c are formed at a fixed position of the injection table 1751b to inject a mixture of cleaning liquid and compressed air.

Referring to FIG. 46, the second injection unit 1752 also includes the injection body 1752a, the injection table 1752b, and the injection port 1752c, and each injection table is staggered as described above. With such a configuration, the contact area between the cleaning liquid sprayed by each spraying device and the exhaust gas is maximized, so that the neutralization reaction of sulfate (SOx) and the aggregation reaction of PM can be effectively generated.

Further, the first injection means 1751 and the second injection means 1752 can be selectively operated depending on the operating state of the engine E, the boiler B, or the like. In this case, the control unit 1754 may be further included for the selective injection to control the injection while flexibly responding to the driving state of the engine or the boiler.

In general, the engine E used in a ship has its operating rate constantly changed, such as when the ship accelerates and decelerates, operates a drill for undersea boring, or increases the usage of an electric power system. Also, the boiler B is hardly used in the hot and humid summer, while it is often used for maintaining the body temperature of the crew and adjusting the temperature of the cargo in the cold and sunny days. As described above, the operating states of the engine E and the boiler B continuously change, which means that the combustion amount of fuel changes. If the amount of combustion of fuel changes, the amount of exhaust gas generated by combustion also changes. In this way, if the amount of exhaust gas discharged changes, the amount of harmful substances such as sulfate (SOx) and PM also changes.

However, even if the exhaust gas discharge amount is reduced, if the cleaning liquid injection amount of the exhaust gas processing device 1b is constant, unnecessary cleaning liquid is being injected. Although the pump must be operated to inject the cleaning liquid, since the pump is operated by electric power, unnecessary injection means unnecessary waste of electric power. Also, unlike the case of spraying a cleaning solution using sea water (pH: 8.3), which is weakly basic, an alkaline additive must be added when a cleaning solution is prepared using fresh water. Alkaline additives are also wasted if the required cleaning liquid is sprayed. Therefore, there is a need to also adjust the injection amount of the cleaning liquid in accordance with the exhaust gas emission amount that changes depending on the operating states of the engine E and the boiler B.

The multiple injection means 175 of the exhaust gas treatment device 1b selectively operates the first injection means 1751 and the second injection means 1752 according to the operating rates of the engine E and the boiler B to inject the cleaning liquid, and as described above. Can solve problems. With such a structure, when the exhaust gas emission is small, only a part of the injection means is operated to inject the cleaning liquid to prevent waste of electric power for operating the pump and save the alkaline additive. You can

In addition, the multiple injection means 175 further includes a third injection means 1753 above the first injection means 1751 and the second injection means 1752 to enable efficient cleaning of harmful substances in the exhaust gas.

At this time, similar to the relationship between the first injection means 1751 and the second injection means 1752, the third injection means 1753 is arranged in a staggered manner with respect to the second injection means 1752 to increase the contact area between the cleaning liquid and the exhaust gas. It is possible to more effectively induce the neutralization reaction of sulfate (SOx) and the aggregation action of PM.

The third injection means 1753 also prevents power consumption of the pump for supplying the cleaning liquid by selectively operating in accordance with the exhaust gas discharge amount which varies depending on the operating rate of the engine E and the boiler B, and adds alkaline. The agent can be saved.

The first injection unit 1751, the second injection unit 1752, and the third injection unit 1753 inject not only the cleaning liquid composed of seawater or fresh water, but also two fluids including compressed air to eject faster and wider. As a result, it is possible to reach a long distance, thereby increasing the contact time and contact area of the sulphate (SOx) and the cleaning liquid, and enabling the neutralization reaction to occur smoothly. In addition, the cooling action by the compressed air can occur more effectively.

Referring to FIG. 47 to FIG. 54, the water droplet separating means 176 is located above the multiple jetting means 175, but is roughly classified into two types.

Referring to FIG. 47, the first type is a cleaning unit that guides the flow of exhaust gas that has been washed up with a cleaning liquid, and one or more horizontal flows that form a spiral flow of exhaust gas that rises through the induction unit 1761. The blade 1762a may include a plug 1764 that prevents exhaust gas from flowing in a certain direction at the upper/lower portions of the blade 1762a, and a first negative pressure prevention unit 1763a that prevents differential pressure above the horizontal blade 1762a. ..

Referring to FIG. 51, the second type is a guide part 1761 for guiding the flow of exhaust gas rising while being cleaned by a cleaning liquid, a twisting blade 1762b for forming a spiral flow of exhaust gas rising through the guide part 1761, A second negative pressure prevention unit 1763b for preventing a pressure difference between the upper side and the side surface of the twisted wing 1762b may be included.

Referring to FIG. 47, FIG. 48, FIG. 51, and FIG. 52, the guide part 1761, which has two types of common structure, includes a guide plate 1761a having a lower wide upper narrower shape that narrows toward the top, and the guide plate 1761a. A guide tube 1761b extended from the upper side of the plate 1761a may be included.

The guide plate 1761a is preferably in the shape of a hollow truncated cone and has a function of guiding the exhaust gas rising through the multiple injection means 175 to the center. At this time, in order to send the exhaust gas only to one side without leaking exhaust gas, the housing 171 may be hermetically fitted to the inner wall surface 1711 having a shape corresponding to the cross section of the housing 171.

The guide pipe 1761b is extended from the upper side of the guide plate 1761a and has a function as a passage for raising and sending the exhaust gas guided to one side by the guide plate 1761a. Can be configured into any shape.

Referring to FIG. 48, one or more horizontal wings 1762a of the first type are provided on a lower plate 1764b, which will be described later, but lie with a certain curvature. Further, the horizontal blades 1762a are separated from each other while maintaining a constant interval so that the exhaust gas can pass between them. With the horizontal blade 1762a having such a shape, the exhaust gas rising through the guide pipe 1761b draws a spiral on the side surface to induce a flowing radial flow.

The cleaning liquid injected from the multiple injection means 175 exists in the exhaust gas in the form of small water droplets, but contains a large number of harmful substances such as sulfates (SOx) and PM. Therefore, it is necessary to prevent the exhaust gas from being released into the atmosphere. For this reason, the blade 1762 forms a spiral flow of the exhaust gas, and the centrifugal force generated at this time causes a relatively heavy water droplet. The exhaust gas is separated from the water droplets by being concentrated on the inner wall surface 1711 while being biased outward.

In addition, all the horizontal blades 1762a can be configured by stationary stators, but when rotating with the compressor, the speed becomes excessively high and the contact time between exhaust gas and cleaning is not sufficient, so the efficiency of cleaning work is high. Because it falls.

The plug 1764 may include an upper plate 1764a and a lower plate 1764b that respectively cover the upper side and the lower side of the horizontal blade 1762a and prevent the exhaust gas from coming out up and down without forming a flow. The upper plate 1764a and the lower plate 1764b may have a circular plate shape when the horizontal blades 1762a are distributed in a circular shape.

When the exhaust gas spirally flows by the vanes 1762, a centrifugal force acts to bias the fluid to the inner wall surface 1711, and the pressure in the center becomes relatively low. In this case, the helical flow may not be properly formed due to the pressure difference, or the pressure may be lower than that of the air above and the upward movement may be hindered. Therefore, there is a need to place a mass at the center of the spiral flow to prevent negative pressure.

Therefore, the first negative pressure prevention means 1763a is located above the horizontal blades 1762a to prevent a pressure difference due to a spiral flow of exhaust gas, but preferably has a conical shape on the upper plate 1764a. .. The flow of exhaust gas due to this can be confirmed in FIG.

Referring to FIG. 51 and FIG. 53, one or more of the twisted blades 1762b are distributed along the outer surface of the guide tube 1761b. Lengthened. At this time, the chord of the root surface, which is in contact with the outer surface of the guide tube 1761b, forms an angle (stagger angle a) with the axis of the guide tube 1761b; and the chord of the outer surface (tip) surface is guided. Since the angle (stagger angle b) with the axis of the tube 1761b is different from each other, the tube 1761b can be formed in a twisted shape as a whole. Generally, b is formed larger than a. The twisted blade 1762b thus twisted guides an oblique flow in which the air exiting the guide tube 1761b spreads downward while drawing a spiral. Preferably, the stagger angle continuously increases from root to tip to more effectively guide the flow of exhaust gas.

Referring to FIG. 53, the twisted blades 1762b are spaced apart from each other by a pitch so that a sufficient space is formed between the blades when viewed from the top, but preferably the intervals are 30 degrees. Can be set. As a result, the pressure loss of the exhaust gas that has flowed out of the guide pipe 1761b can be minimized and a spiral bypass flow can be created. Further, all the twisted blades 1762b can be configured by stationary stators (stator), but when rotating together with the compressor, the speed is too fast and the contact time between the exhaust gas and the cleaning liquid is insufficient, so that the efficiency of the cleaning work is improved. Because it falls.

The second negative pressure prevention unit 1763b is extended to a lower portion of the twisting blade 1762b so that the exhaust gas rising through the guiding tube 1761b can be bypassed and escaped downward so that the twisting blade 1762b and the guiding tube 1761b are all formed. Can be covered. As a result, when the water droplets of the cleaning liquid containing the harmful substance in the exhaust gas are separated by the centrifugal force, they are also subjected to the force downward, and effective separation is possible. The second negative pressure prevention unit 1763b has a hollow cylindrical shape for the flow of exhaust gas, but preferably has a cylindrical shape to effectively prevent the differential pressure. Alternatively, a conical first negative pressure prevention means 1763a may be further included above the second negative pressure prevention means 1763b. The spiral bypass flow of exhaust gas with such a configuration can be confirmed in more detail in FIG.

Referring to FIGS. 55 and 56, the water drop collecting means 177 is configured to collect water drops separated from the exhaust gas under the water drop separating means 176 and covers the cross section of the housing 171 while covering the guide pipe 1761b. The partition plate 1771 having the same shape, the inclined plate 1772 having the same configuration as the guide plate or being developed in parallel with the guide plate, the drop pipe 1773 extending downward from one side of the tilt plate 1772, and the drop pipe 1773. A collection tube 1774 located at the lower end may be included.

The water drop separating means 176 is configured to separate water drops in the exhaust gas, and deflects the cleaning liquid containing harmful substances such as sulfates (SOx) and PM toward the inner wall surface 1711 side by using centrifugal force. The separated water droplets are required to have a means for dropping them under the influence of the flow of exhaust gas before they rise again, but at the same time, it is necessary to prevent the exhaust gas from rising to the passage through which the water droplets fall. I won't.

49, 53, and 55, the partition plate 1771 includes a plurality of through holes 1771a around the partition plate 1771 to drop the water drops separated by the water drop separation means 176. At this time, if the exhaust gas treatment device 1b is installed in a ship, water droplets can flow into the through hole 1771a due to rolling and pitching of the hull without separately tilting the partition plate 1771.

The inclined plate 1772 is developed while maintaining a predetermined inclination so that water droplets dropped from the through hole 1771a of the partition plate 1771 can flow outward, but preferably has a conical shape. Although one or more drop holes 1772a are included on one side in order to drop the water droplets flowing to the outside as described above, preferably four drop holes 1772a are provided at every 90 degrees.

The drop pipe 1773 is extended downward from a drop hole 1772a formed on one side of the inclined plate 1772 to drop water droplets to the lower part of the housing 171. Although various shapes are possible, it is preferable to have a cross section that matches the drop hole 1772a, but in the case of FIG. 29, since the drop hole 1772a is formed in a triangle, the drop tube 1773 also has a triangular prism shape.

Referring to FIGS. 55 and 56, the collecting cylinder 1774 is a cylinder that collects water droplets that have descended on the drop pipe 1773 and is below the third spraying means 1753, so that the sprayed cleaning liquid Configure to be always full. Also, if the drop pipe 1773 is extended to the inside of the collecting cylinder 1774 and completely immersed in the cleaning liquid sprayed from the third spraying means 1753, the exhaust gas rides on the drop pipe 1773 and rises to the water droplet separating means. It can be prevented from being released without passing through 176.

57 and 58, the water drop blocking unit 178 may include a first blocking unit 1781 and a second blocking unit 1782, each of which is located above the water droplet separating unit 176 and separated from the exhaust gas. Some of the water droplets do not fall and are blocked by the influence of the flow of the exhaust gas on the inner wall surface 1711 of the housing 171, and water droplets containing harmful substances are released into the atmosphere. Prevent.

Since the cleaning liquid composed of seawater or fresh water injected from the injection means 173 and 175 has a function of neutralizing sulfate (SOx) and aggregating PM, the cleaning liquid water droplets present on the upper portion of the exhaust gas treatment device 1b. Contains various harmful substances contained in the exhaust gas. If such a water droplet of the cleaning liquid is discharged into the atmosphere together with the cleaned exhaust gas, the exhaust gas treatment device 1b itself becomes meaningless, but it is necessary to prevent the water droplet from being discharged into the atmosphere.

To this end, the horizontal blades 1762a of the water drop separating means 176 induce a spiral flow of the exhaust gas containing the cleaning liquid water drops, and the relatively heavy liquid water drops are deflected toward the inner wall surface 1711 of the housing 171 by centrifugal force. Let Alternatively, the inclined blades 1762b of the water drop separating means 176 guide the spiral flow while circumventing the exhaust gas downward, and the water drops are biased below the inner wall surface 1711 side by the centrifugal force. Then, the water droplets of the cleaning liquid, which are biased toward the inner wall surface 1711 side, drop down by the action of gravity, and are collected by the water droplet collecting means 177 and fall to the bottom side of the housing 171, preventing their release into the atmosphere. To be done.

However, in spite of the water droplet collecting means 177, some of the water droplets of the cleaning liquid separated by the water droplet separating means 176 do not fall after being biased to the inner wall surface 1711 of the housing 171, and the exhaust gas rises due to the pressure difference. In some cases, the inner wall surface 1711 may ride on the upper side of the housing 171 due to the influence of the flow. The water droplets rising on the inner wall surface 1711 can rise to the upper side of the housing 171 and be released into the atmosphere, but it is necessary to block the water droplets to prevent the discharge of harmful substances. To do.

Referring to FIG. 57, for this purpose, the inner wall surface 1711 is bent vertically toward the center in the vicinity of the gas outflow portion 1713 in addition to the vertical surface 1711a that is vertically straightly extended, and is formed as an extended slope. The surface 1711b can be included. The inclined surface 1711b can block the water droplets rising along the vertical surface 1711a due to the influence of exhaust gas to some extent. However, when the exhaust gas encounters the inclined surface 1711b, the exhaust gas bends and flows along the inclination, so that the water droplets affected by the exhaust gas may rise along the inclined surface 1711b and be discharged into the atmosphere. It still exists.

To prevent this, the first blocking means 1781 may include a blocking wall 1781a extending downward from one side of the inclined surface 1711b. The blocking wall 1781 is distributed along the boundary of the gas outlet 1713 in a thick band shape, but when the gas outlet 1713 is circular, the blocking wall 1781a has a hollow cylindrical shape. As a result, the water droplets rising along the inner wall surface 1711 flow along the blocking wall 1781a through the inclined surface 1711b, and since there is no surface on which the lower end portion of the blocking wall 1781a rides up, it falls down due to gravity. .. Preferably, the blocking wall 1781 may be expanded in the direction in which gravity acts to further improve the blocking effect. Such a water drop flow can be confirmed in more detail in FIG.

The second blocking unit 1782 is located under the first blocking unit 1781, but may include a lower inclined surface 1782b and another blocking wall 1782a.

The lower inclined surface 1782b is bent toward the center at a predetermined angle on one side of the vertical surface 1711a of the housing 171, and has a function of guiding water droplets rising on the vertical surface 1711a to the blocking wall 1782a. At this time, in order to smoothly guide the water droplets, it is preferable that the angle is formed larger than 90 degrees so that the inclined surface is inclined downward.

The blocking wall 1782a extends downward from the end of the lower inclined surface 1782b, but is preferably deployed in a direction in which gravity acts. The water droplets riding on the downwardly inclined surface 1782b encounter the blocking wall 1782a and descend vertically, and at the end of the blocking wall 1782a, the surface on which the water flows is lost and falls downward due to gravity. become.

The two blocking means 1781 and 1782 can prevent water droplets of the cleaning liquid containing harmful substances such as sulfate (SOx) and PM from being released into the atmosphere together with the clean gas.

Based on the configuration described above, the exhaust gas generated by combustion in an engine, a boiler, etc. passes through the exhaust gas treatment device 1b while removing harmful substances such as sulfates (SOx) and particulate matter (PM) for cleaning. The process of conversion into gas will be described with reference to FIGS. 29 and 30.

Referring to FIGS. 29 and 30, the exhaust gas enters the inside of the housing 171 through the gas inflow portion 1712. On the upper side of the gas inflow pipe 1712a, the diffusion means 172 is encountered and spreads in all directions, and immediately thereafter, the PM in the exhaust gas is condensed by the mixture of the cleaning liquid and the compressed air injected by the injection means 173. At this time, although the exhaust gas forms a flow deflected to the inner wall surface 1712 side by the diffusion means 172, it passes through the distribution means 174 and is evenly distributed in the center. Exhaust gas evenly distributed over the entire cross section of the housing 171 is neutralized by the cleaning liquid injected from the multiple injection means 175 to neutralize sulfate (SOx) and agglomerate PM, and is formed into a spiral shape by the water droplet separation means 176. Flowing uses centrifugal force to separate water droplets to the outside. The separated water drops fall by the water drop collecting means 177, and the exhaust gas continuously rises while spiraling. However, due to the influence of the flow of exhaust gas, the water droplets that cannot be dropped and rise along the inner wall surface 1711 are blocked and blocked by the blocking means 178 to prevent the release of harmful substances to the atmosphere.

Through the configuration and process described above, the exhaust gas separates harmful substances such as sulphate (SOx) and particulate matter (PM) into a clean gas and is released into the atmosphere.

Meanwhile, FIG. 59 shows an exhaust gas treatment system according to another embodiment of the present invention.

The exhaust gas treatment system shown in FIG. 59 is different from the embodiment shown in FIG. 1 in that the level measuring unit 61, the flow rate adjusting unit 62, the level determining unit 63, and the measure unit, which are related configurations of the harmful gas removing unit 6, are included. 64 is provided.

The level measuring unit 61 serves to measure the cleaning liquid level in the harmful gas removing unit 6. While the cleaning liquid discharged from the exhaust gas treatment device 1 remains in the harmful gas removing means 6 for a certain period of time, the harmful gas remaining in the cleaning liquid in a gaseous state is removed. Reference numeral 4 measures the level of the cleaning liquid remaining in the harmful gas removing means 6, that is, the water level, so that the operation corresponding to the processing capacity of the harmful gas removing means 6 can be performed.

The level measuring unit 61 may be characterized by measuring the cleaning liquid level in the harmful gas removing unit 6 based on the pressure in the harmful gas removing unit 6. In this case, the level measuring unit 61 detects a pressure sensor that senses a pressure change according to a level change of the cleaning liquid inside the harmful gas removing unit 6, that is, a transducer and an electric signal transmitted from the transducer. An amplifier that amplifies, a connector that connects the amplifier and the transducer, and the like may be included.

The level measuring unit 61 may adopt various methods such as a measurement method using ultrasonic waves in addition to the pressure-based measurement method as described above, and thus a detailed configuration may be changed. it can. That is, the method by which the level measuring unit 61 measures the cleaning liquid level in the harmful gas removing means 6 is not particularly limited to a specific method.

The flow rate adjusting unit 62 serves to adjust the cleaning liquid discharge flow rate of the harmful gas removing unit 6 based on the measurement result of the level measuring unit 61. The flow rate control unit 5 controls the discharge flow rate of the harmful gas removing unit 6 under the control of a control unit and the control unit which are connected to the level measuring unit 61 in a circuit manner or through wired/wireless communication. The adjusting means may be included in the adjusting means, and the adjusting means may be a throttle valve.

It is preferable that the flow rate adjusting unit 62 adjusts the cleaning liquid discharge flow rate in real time so that the cleaning liquid level in the harmful gas removing unit is within a preset range. Through this, the level of the cleaning liquid remaining in the harmful gas removing means 6 can be maintained at an appropriate level for removing harmful gas.

The level determining unit 63 plays a role of determining whether the level of the cleaning liquid remaining in the exhaust gas treatment device 1 for moving to the harmful gas removing unit 6 has reached a preset critical level. The level determination unit 63 may include a level switch or the like that is installed at a position where the cleaning liquid level in the exhaust gas treatment device 1 can be measured and indicates when a certain water level is reached.

Since the harmful gas removing unit 6 is designed in consideration of the volume of the cleaning liquid discharged by the exhaust gas processing apparatus 1, the harmful gas removing unit 6 is controlled in the exhaust gas processing apparatus 1 by adjusting the cleaning liquid discharge flow rate. It is general that the cleaning liquid level is also maintained at an appropriate level. However, the cleaning liquid is not smoothly discharged through the harmful gas removing unit 6 due to a failure of one or more of the harmful gas removing unit 6, the level measuring unit 61, and the flow rate adjusting unit 62. When the water level of the cleaning liquid exceeds the critical level inside the exhaust gas treatment device 1, the durability and performance of the exhaust gas treatment device 1 may be adversely affected. The level judgment unit 63 is for preventing such a problem.

When the level of the cleaning liquid remaining in the exhaust gas treatment device 1 in order to move to the harmful gas removing means 6 reaches a preset critical level as a result of the determination of the level determining unit 63, the measure unit 64 , A part that performs one or more of the generation of the danger warning and the control for stopping the cleaning liquid injection of the exhaust gas treatment device 1. The measure unit 64 may include a control unit that is circuit-connected to the level determination unit 63 or is connected through wired/wireless communication to generate a warning and control the exhaust gas treatment device.

The measure unit 64 can also generate the danger warning through visual and audible means, and completely suspends the operation of the exhaust gas treatment device 1 to stop the cleaning liquid injection of the exhaust gas treatment device 1. You can also Through such measures of the measure section 64, it is possible to prevent deterioration of the durability and malfunction of the exhaust gas treatment device 1 due to the backflow of the cleaning liquid.

Although the applicant has described various embodiments of the present invention, such an embodiment is one embodiment for embodying the technical idea of the present invention, and as long as embodying the technical idea of the present invention, Alterations or modifications should also be construed as falling within the scope of the invention.

Claims (12)

An exhaust gas processing device that inflows exhaust gas generated by combustion and injects a cleaning liquid into the exhaust gas to remove harmful substances in the exhaust gas,
A transfer pipe for transferring the exhaust gas from the combustion device that generates exhaust gas by combustion to the exhaust gas processing device,
An air blower that causes air to flow,
A ventilation part is provided for supplying the air generated by the blower part to the exhaust gas processing device when the exhaust gas processing device is not in operation to discharge the exhaust gas remaining in the exhaust gas processing device. An air supply section,
An exhaust gas treatment system including. Further comprising a transfer pipe blocking means for blocking the exhaust gas in the transfer pipe from flowing into the exhaust gas processing device when the exhaust gas processing device is not operating,
The exhaust gas processing system according to claim 1, wherein the ventilation unit supplies the air to the exhaust gas processing device in a state where the transfer pipe blocking unit blocks the air. One end of the ventilation unit is connected to the blower unit, and the other end of the ventilation unit has a ventilation air supply pipe that communicates with a section of the transfer pipe between the transfer pipe blocking unit and the exhaust gas treatment device. The exhaust gas treatment system according to claim 2, characterized in that The exhaust gas treatment system according to claim 3, wherein the ventilation unit further includes a ventilation air supply pipe valve that opens and closes a flow path of the ventilation air supply pipe. The transfer pipe cutoff means is a transfer pipe damper valve installed in the transfer pipe to receive air in a closed state to cut off an exhaust gas flow path in the transfer pipe. Exhaust gas treatment system as described. The exhaust gas treatment system according to claim 5, wherein the air supply unit further includes a transfer pipe sealing unit configured to supply the air generated by the blower unit to the transfer pipe blocking unit. A bypass pipe which is a pipe branched from the transfer pipe, and which bypasses the exhaust gas in a state in which the transfer pipe is cut off by the transfer pipe cutoff means,
When the exhaust gas treatment device is not in operation, the exhaust gas is diverted to the bypass pipe, and when the exhaust gas treatment device is in operation, the bypass pipe shutoff means is provided to shut off the bypass pipe so that the exhaust gas proceeds to the transfer pipe. ,
The exhaust gas treatment system according to claim 6, further comprising: The bypass pipe cutoff means is a bypass pipe damper valve installed in the bypass pipe to receive air in a closed state to cut off an exhaust gas flow path in the bypass pipe. Exhaust gas treatment system as described. 9. The exhaust gas treatment system according to claim 8, wherein the air supply unit further includes a bypass pipe sealing unit that supplies the air, the flow of which is generated by the blower unit, to the bypass pipe blocking unit. A harmful gas removing means that is connected to the exhaust gas treatment device, removes the harmful gas remaining in a gaseous state in the cleaning liquid discharged from the exhaust gas treatment device, and discharges the cleaning liquid from which the gaseous harmful gas is removed. Further equipped with,
The air supply unit further comprises a reaction inducing unit that supplies the harmful gas removing unit with the air generated by the air blowing unit to induce a reaction with the harmful gas. 9. The exhaust gas treatment system according to any of 9. The exhaust gas treatment system according to claim 10, wherein one end of the reaction inducing section is connected to the air blowing section, and the other end of the reaction inducing section has a reaction air supply pipe communicating with the harmful gas removing unit. The exhaust gas treatment system according to claim 11, wherein the reaction induction unit further includes a reaction air supply pipe valve that opens and closes a flow path of the reaction air supply pipe.

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