KR20170010102A - System for treating exhaust gas from marine diesel engine - Google Patents

Abstract

A ship diesel engine exhaust gas treatment system capable of reliably removing particulate matter and sulfur oxides contained in exhaust gas discharged from a marine diesel engine. An electric dust collector (7) for collecting PM in the exhaust gas output from the marine diesel engine; and a seawater scrubber (7) for removing SOx by spraying seawater to the exhaust gas from which the PM is removed by the electric dust collector An exhaust gas component detector (LA3) for detecting an exhaust gas component after the treatment by the electric dust collector and the seawater scrubber; a seawater component adjuster (9) for recovering the seawater sprayed by the seawater scrubber A seawater circulation unit 9D for returning the sea water component adjusted by the seawater component adjustment unit to the seawater scrubber, and a control unit 9C for controlling the operation of the electricity generation unit 9C so that the residual components of the exhaust gas, And an exhaust gas processing control section for adjusting the operation state of the dust collecting apparatus and the seawater scrubber.

Description

TECHNICAL FIELD [0001] The present invention relates to a diesel engine exhaust gas treatment system for a ship,

The present invention relates to a marine diesel engine exhaust gas treatment system for treating exhaust gas from a marine diesel engine mounted on a marine vessel.

The exhaust gas discharged from the marine diesel engine contains harmful substances such as particulate matter (PM) containing carbon as a main component in addition to nitrogen compounds (NOx) and sulfur oxides (SOx). Particularly, PM is known to cause various health damages if humans breathe PM into the body by breathing. Therefore, a marine diesel engine mounted on a ship needs a PM eliminating device for efficiently removing PM.

As such a PM elimination device for a marine diesel engine, there is a method of installing a filter in an exhaust duct. However, the filter has problems such as easy clogging and high pressure loss. On the other hand, the electrostatic dust precipitator is effective for adhering to the exhaust duct of the internal combustion engine since no clogging occurs and the pressure loss is small. However, in a dry electrostatic precipitator, it is difficult to treat gas components such as SOx in the exhaust gas.

For this reason, conventionally, there has been applied an electric dust collection system as an apparatus for cleaning exhaust gas discharged from a marine diesel engine to reduce SOx and PM. For example, electric dust collecting means composed of a discharge electrode and a collecting electrode are disposed along an exhaust duct (flue) of a marine diesel engine, and filter means for collecting solid particles in the exhaust gas are arranged. And the amount of water sprayed by the sea spraying means is controlled so that the temperature of the exhaust gas at the inlet of the electric dust collecting means becomes the acid dew point, (Refer to Patent Document 1, for example).

Further, in addition to the electric dust collection system, there is also known a device for reducing SOx and PM by cleaning the exhaust gas resulting from combustion discharged from a marine diesel engine, for example, by arranging a scrubber for gas cleaning, The seawater is supplied to the centrifugal separator to remove the soot / dust, and the separated seawater is supplied to the oil remover to remove oil from the oil, and neutralize the seawater from which the oil has been removed And then the neutralized sea water is supplied to the scrubber for scrubbing the gas to be used for cleaning the exhaust gas (see, for example, Patent Document 2).

Japanese Patent Application Laid-Open No. 2009-52440 Japanese Patent Application Laid-Open No. 2004-81933

However, in the example of the conventional marine exhaust gas treatment apparatus described in Patent Document 1, the exhaust gas is cooled to the crest point temperature by the water-cooling apparatus on the upstream side of the electric dust collecting unit to make the SO ₂ misty and removed. However, it is necessary to pay attention to the handling when disposing a mixed liquid of sulfuric acid mist and sulfuric acid stored in a sulfuric acid recovery tank, and it is necessary to pay attention to the disposal of strong acidic waste liquid There is an unresolved problem that a cost corresponding to the processing becomes necessary.

In the example of the conventional wastewater treatment apparatus described in Patent Document 2, instead of the electric dust collection system, the exhaust gas discharged from the marine diesel engine is supplied to the scrubber for gas cleaning, and the exhaust gas is cleaned with the seawater, . However, since a large amount of seawater is used, there is an unresolved problem that a large-scale water treatment apparatus that processes drainage including sold-out becomes necessary.

Accordingly, the present invention has been made in view of the unsolved problems of the above-mentioned conventional marine exhaust gas treatment device and wastewater treatment device. INDUSTRIAL APPLICABILITY The present invention can reliably remove PM and SOx contained in the exhaust gas discharged from a marine diesel engine and can reduce the amount of seawater used, the load of drainage treatment and the amount of generated waste, Which is capable of reducing the installation space of a diesel engine exhaust gas processing system for a ship.

In order to achieve the above object, a marine diesel engine exhaust gas treatment system according to the present invention is a marine diesel engine exhaust gas treatment system for treating exhaust gas resulting from combustion of a marine diesel engine mounted on a marine vessel. The present invention relates to a marine diesel engine, an electric dust collector for collecting particulate matter in the exhaust gas discharged from the marine diesel engine, a seawater scrubber for spraying seawater to the exhaust gas from which particulate matter has been removed by the electric dust collector, A seawater component adjustment unit for recovering the seawater sprayed by the seawater scrubber and performing component adjustment; and a water quality monitoring unit for monitoring the quality of the recovered seawater whose components are adjusted by the seawater component adjustment unit An exhaust gas treatment control section for adjusting the operation state of the electric dust collector and the seawater scrubber so that the concentration of the component after exhaust gas treatment detected by the exhaust gas component detection section becomes within a specified range; If the seawater component detected by the measuring unit falls within the specified range Such that the water component and having a water component control unit for adjusting the operational state of the adjustment, the water scrubber, and spraying the composition adjusted the reject water by the seawater ingredients adjusting the exhaust gas.

According to the first aspect, the exhaust gas containing PM, SOx, and the like discharged from the marine diesel engine is supplied to the electric dust collector to collect the PM with high efficiency. Further, the exhaust gas from which the PM is removed is supplied to the seawater scrubber to remove SOx. Then, the exhaust gas component after the exhaust gas treatment is detected by the exhaust gas component detecting unit. And adjusts the operating state of the electric dust collector and the seawater scrubber in the exhaust gas processing control section according to the detection result, thereby adjusting the concentration of PM and SO ₂ contained in the final exhaust gas within the specified range. Further, the seawater sprayed by the seawater scrubber is recovered in the seawater component adjustment section to perform component adjustment such as oil separation and pH adjustment. Then, the recovered seawater subjected to the component adjustment is returned to the seawater scrubber to circulate the seawater. Therefore, the exhaust gas discharged from the marine diesel engine can be reliably cleaned, and the seawater consumption by the seawater scrubber can be greatly reduced. Furthermore, it is possible to operate a ship without discharging it even in a port where the drainage regulation is strict.

According to the present invention, PM is removed by an electric dust collector and exhaust gas discharged from a marine diesel engine is removed by a seawater scrubber, so that PM and SOx can be reliably removed.

Further, the seawater is injected into the exhaust gas by the seawater scrubber to remove the SOx, and the seawater containing the SOx is subjected to component adjustment such as oil separation or pH adjustment at the seawater component adjustment unit, and then returned to the seawater scrubber at the seawater circulation unit By using the seawater circulating in the seawater scrubber, it is possible to drastically reduce the amount of seawater used and minimize the influence on the surrounding environment.

In addition, since PM is removed by an electrostatic precipitator of exhaust gas and then SOx is removed by a seawater scrubber, the amount of seawater used, the load of drainage treatment and the amount of generated waste can be reduced, The installation space of the ship can be minimized, so that the impact on the existing loading / unloading space of the ship can be minimized.

1 is a system configuration diagram showing one embodiment of a marine diesel engine exhaust gas treatment system according to the present invention.
2 is a general configuration diagram showing a specific configuration of the electric dust collector with a part of an outer cylinder removed.
3 is a perspective view showing a main part of the electrostatic precipitator.
4 is a block diagram showing a specific configuration of the electric dust collector control unit.
Fig. 5 is a flowchart showing an example of a dust feed-forward control processing procedure executed by the dust-collection control processing unit of Fig.
Fig. 6 is a flowchart showing an example of a dust feedback control processing procedure executed by the dust collection control processing unit of Fig. 4;
Fig. 7 is a flowchart showing an example of a moving-state monitoring processing procedure executed by the dust-collection control processing unit in Fig.
8 is a configuration diagram showing a specific configuration of a seawater scrubber.
Fig. 9 is a flowchart showing an example of a seawater component control process procedure executed by the seawater component control section.
10 is a flowchart showing an example of the scale removal processing procedure executed by the seawater component control unit.
11 is a flowchart showing an example of a moving-situation monitoring procedure executed by the seawater component controller.
Fig. 12 is a flowchart showing an example of a circulating water monitoring process sequence executed by the seawater component control unit.
13 is a cross-sectional view showing a specific configuration of the first gas analysis system.
14 is a cross-sectional view showing a specific structure of the second gas analysis system.
15 is a sectional view showing a specific configuration of the third gas analysis system.
16 is a block diagram showing a specific configuration of the injection control unit of the scrubber control unit.
Fig. 17 is a flowchart showing an example of a moving-situation monitoring procedure executed by the scrubber control unit. Fig.
18 is a block diagram showing the overall configuration of a control system of a marine diesel engine exhaust gas treatment system.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

Fig. 1 is an overall configuration diagram showing the first embodiment of the present invention.

In the figure, 1 is a relatively large vessel having a gross tonnage of several thousand tons or more, for example. The ship 1 may be a main diesel engine for rotating a propeller 2 such as a screw propeller or an auxiliary diesel engine for supplying power in a ship 3).

From the marine diesel engine 3, exhaust gas resulting from combustion of the fuel is discharged. As described above, the exhaust gas contains nitrogen oxide (NOx), sulfur oxide (SOx), and particulate matter (PM) containing carbon as a main component.

The exhaust gas discharged from the marine diesel engine 3 is first supplied to the NOx removal device 5 through the pipe 4. The denitration unit (5) supplies ammonia as a reducing agent to the titanium-vanadium-based denitration catalyst provided in the exhaust gas passage. Here, the ammonia selective catalytic reduction (SCR) method, which decomposes into nitrogen and water by reacting with nitrogen oxides (NOx) contained in the exhaust gas, is applied. The ammonia to be supplied to the catalyst is generated by injecting a liquid reducing agent such as urea water mixed with urea water stored in the urea tank 6 from the injection nozzle 5a and decomposing the urea water .

The exhaust gas from which the NOx outputted from the denitration unit 5 is removed is supplied to the electric dust collector 7. In the electric dust collector 7, PM containing carbon as a main component contained in the exhaust gas is removed.

The electric dust collector 7 is a particulate matter particulate material having a particle diameter of not more than 100 mu m, particularly not more than 10 mu m, such as SPM : Suspended Particulate Matter).

1, the electric dust collecting apparatus 7 includes an electric dust collecting apparatus main body 7A, an electric dust collecting apparatus control section 7B for controlling a high voltage or a current to be supplied to the electric dust collecting apparatus main body 7A, And a cyclone device 7C for recovering and discarding the PM collected in the main body 7A of the electric dust collector.

2, the electric dust collecting apparatus main body 7A includes a rectangular tubular conductive outer case 11 and an end plate (not shown) provided on the axial end face of the outer case 11 end plates (end plates) 12a and 12b. Electrode housing parts 15a to 15d divided into four parts by a partition plate 14 are formed in the case 13.

As shown in Fig. 3, each of the electrode accommodating portions 15a to 15d is formed of a truncated pyramid-shaped tubular gas, into which a head for introducing a PM-containing gas supplied from the denitration device 5 is cut, A swirling flow forming portion 17 for sending out (sending out) a PM containing gas formed on the downstream side of the gas introducing portion 16 as a swirling flow; And a discharge electrode 18 disposed on the downstream side of the electrode supporting portion 19 are arranged in a radial direction at predetermined distances Which is composed of, for example, a stainless steel tubular electrode 20 which surrounds and covers the tubular electrode 20, and an outer case 11 which is composed of a partition plate 14 and an outer case 11, (21) and a discharge electrode supporter (23) disposed on the most downstream side.

The discharge electrode 18 is disposed on the negative electrode side and the cylindrical electrode 20 and the casing electrode 21 are disposed between the discharge electrode 18 and the tubular electrode 20 and the casing electrode 21, Is connected to a DC high-voltage source of about 10 ³ to 10 ⁵ volts, which is on the positive electrode side, and the anode side is grounded. Thus, when a PM-containing gas is supplied as a circulating air flow between the discharge electrode 18 and the cylindrical electrode 20, PM contained in the PM-containing gas is charged by corona discharge. A Coulomb force acts on the PM by the electric field between the discharge electrode 18 and the cylindrical electrode 20 so that the PM starts to move toward the cylindrical electrode 20. [ The PM passes through the through hole 20a of the tubular electrode 20 as it is by inertia force and becomes a half-closed space between the tubular electrode 20 and the casing electrode 21 And is guided to a collecting space 22.

In the trapping space 22, since the flow distribution is very gentle, the PM is hardly influenced by the flow field. The PM receives the electric image force due to the electric potential difference between the cylindrical electrode 20 and the casing electrode 21 and the outer peripheral surface of the cylindrical electrode 20 and the inner peripheral surface of the casing electrode 21 And then collected. For reference, the numerical analysis shows that the flow rate of the main stream of the PM-containing gas in the gas passage in the cylindrical electrode 20 is about 1/20 to 1/10 in the majority of the trapping space 22, It has been confirmed that the flow rate is locally about 1/4.

According to the electric dust collecting apparatus main body 7A, it is only necessary to pass the PM containing gas through the gas passage between the discharge electrode 18 and the cylindrical electrode 20, It is not necessary to provide a blower or the like as means. Further, since there is no need to provide a damper or the like that interrupts the flow of the PM-containing gas, the pressure loss of the PM-containing gas can be reduced. Further, since the diameter of the through-hole 20a formed in the tubular electrode 20 can be formed to be a large diameter irrespective of the particle diameter of the PM, the pressure loss can be reduced as much. Since the PM is collected on the outer circumferential surface of the tubular electrode 20 constituting the trapping space 22 or on the inner circumferential surface of the casing electrode 21, Capture can be allowed. Furthermore, it is very difficult for the through hole 20a to be clogged, and it is possible to reliably prevent the trapping trouble due to clogging from occurring. Furthermore, since the flow field in the trapping space 22 is small, it is not easily generated that the PM trapped once is scattered again. Furthermore, since there is no moving part such as a damper or a blower, the possibility of failure is very low. The PM collected in the trapping space 22 is recovered in the cyclone device 7C shown in Fig. 1, is depressurized by a compressor (not shown) at its outlet, and stored in a waste container such as a drum .

A first laser analyzer LA1 having the configuration of FIG. 13, which will be described later, is disposed as an exhaust gas component detector using a visible light laser for detecting the PM concentration in the exhaust gas at the inlet side of the main body 7A of the electric dust collector. 2 having the electric dust collecting device outlet-side pipe, the configuration of Fig. 14 to be described later as an exhaust gas component detection using a popularly outer region a laser for detecting the visible light laser and SO ₂ concentrations for detecting the PM concentration in the exhaust gas of the main body (7A) And a laser analyzer LA2 is disposed.

Then, the electric dust collector control unit 7B performs the dust collecting feedforward control process shown in FIG. 5, the dust collecting feedback control process shown in FIG. 6 to be described later, and the operation state monitoring process of the dust collecting apparatus shown in FIG.

5, when the electric dust collector control unit 7B determines that the PM elimination rate calculated by the PM concentration in the exhaust gas detected by the first laser analyzer LA1 and the second laser analyzer LA2 (That is, the PM dust collection rate) falls within a predetermined range set in advance.

A specific configuration of the electric dust collecting apparatus control section 7B includes a current command value generating section 7D, a dust collecting control processing section 7E and a current generating section 7F as shown in Fig.

The current command value generating section 7D sets the discharge electrode 18 between the discharge electrode 18 of the electric dust collecting apparatus main body 7A and the cylindrical electrode 20 and the casing electrode 21 as the cathode side, A direct current high voltage of about 10 ³ to 10 ⁵ volts with the tubular electrode 20 and the casing electrode 21 as the anode side is generated so that the current command value IHt for supplying the electric current to the main body 7A of the electric precipitator is .

The dust collection control processing unit 7E executes the dust collection feed forward control process shown in Fig. 5 to calculate the dust collection rate DCE and calculates the calculated dust collection rate DCE lower than the dust collection rate threshold DCEth The correction current IHa is calculated so as not to be lower. More specifically, the PM concentration (C1, C2, and C3) detected by the first laser analyzer LA1, the second laser analyzer LA2, and the third laser analyzer LA3 are input to the dust collection control processor 7E . The dust collection control processing unit 7E calculates the PM removal rate, that is, the PM collection rate DCE based on the PM concentrations C 1 and C 2. When the calculated PM collection rate DCE is less than the collection rate threshold value DCEth, And outputs the correction current IHa to the adder 7G which adds the calculated correction current IHa to the current command value IHt output from the current command value generator 7D.

6, the electric dust collecting apparatus control unit 7B controls the electric dust collecting apparatus control unit 7B such that the electric dust collecting apparatus control unit 7B performs the dust collecting operation in the recovered seawater in the piping 55 measured by the turbidimeter 58 provided in the water quality measuring unit 33 The turbine component concentration (turbidity) of the turbine component is controlled within a predetermined range.

The dust collection control processing section 7E executes the dust feedback control processing shown in Fig. 6 to measure the turbidity T and calculate the correction current IHa (T) so that the measured turbidity T does not exceed the upper turbidity threshold value UT ).

Specifically, turbidity T measured by turbidimeter 58 is input to dust collection control processing section 7E. The dust collection control processing unit 7E calculates the correction current IHa so that the turbidity T does not exceed the upper turbidity UT and outputs the calculated correction current IHa from the current command value generation unit 7D And outputs it to the adder 7G which adds the current command value IHt to the output current command value IHt.

4, the dust collecting control processing section 7E of the electric dust collecting apparatus control section 7B determines whether or not the current PM dust collecting rate DCE calculated in the dust collecting control processing, (Abnormal) information to the system management unit 71, which will be described later, via the network NW.

Here, the dust-collecting feed forward control process shown in Fig. 5, the dust-collection feedback control process shown in Fig. 6, and the operation status monitoring process of the dust-collecting device shown in Fig. 7 will be described in detail with reference to the drawings.

First, the dust-collection feedforward control process executed by the electric dust collector control unit 7B will be described in detail with reference to the flowchart of Fig.

5, first, in the step S1, the dust-collecting control processing section 7E is connected to the first and second laser analyzers LA1 and LA2 arranged on the inlet side and the outlet side of the electric dust collecting apparatus main body 7A And the PM concentrations C1 and C2 detected by the sensors are read.

Subsequently, the process proceeds to step S2, where the dust collection control processing section 7E performs calculation of the following equation (1) based on the PM concentrations C1 and C2 detected by the laser analyzers LA1 and LA2, (DCE) of the particulate filter 7A is calculated, and then the process proceeds to step S3.

DCE = (1 - C2 / C1) x100 ... ... ... (One)

In step S3, the dust collection control processing section 7E determines whether or not the calculated dust collection rate DCE is less than the PM dust collection threshold value DCEth indicating the lower limit of the dust collection rate. If DCE <DCEth, It is determined that the PM collection rate DCE is lowered and the process proceeds to step S4. After the correction number N is incremented by "1 &quot;, the process proceeds to step S5.

In step S5, the dust collection control processing unit 7E calculates the correction current IHa by multiplying the correction number N by a reference correction current I set in advance, and then proceeds to step S6 to calculate the correction current IHa And outputs it to the adder 7G. Then, the process proceeds to step S7.

In step S7, the dust collection control processing unit 7E determines whether or not the correction number N reaches the preset number of correction limit Ns. If N <Ns, the process returns to step S1, Ns, it is determined that the PM collection efficiency DCE does not improve even if the current correction is performed. Then, the process proceeds to step S8, where the output of the correction current IHa is stopped and the process proceeds to step S9. Note that the correction limit number Ns is obtained by multiplying the reference current I by the reference correction current I and the correction limit number Ns by a constant current based on the current command value IHt of the current generation unit 7F, And the value after the addition is set so as not to exceed a predetermined current threshold value. In step S9, the dust collection control processing unit 7E starts the cyclone apparatus 7C that performs the PM collection processing, and then proceeds to step S10. After the correction number N is cleared to "0 &quot; Come back.

On the other hand, when the determination result in step S3 is DCE? DCEth, the dust collection control processing unit 7E determines that the PM collection rate DCE exceeds the preset dust collection rate threshold DCEth, and proceeds to step S11 .

In the step S11, the dust collection control processing section 7E determines whether or not the correction current IHa has been outputted during the previous processing, outputs the correction current IHa during the previous processing When the correction current IHa is not present, the process returns to the step S1, and when the correction current IHa has been outputted at the previous process, the process proceeds to the step S12. In step S12, the dust collecting control processor 7E stops outputting the correction current IHa, and then proceeds to step S13 to clear the aforementioned number of correction times N to "0 " come.

Next, the dust collecting feedback control processing executed in the electric dust collector control unit 7B will be described in detail with reference to the flowchart of Fig.

6, first, in step S21, the dust collection control processing unit 7E reads the turbidity T measured by the turbidimeter 58 connected to the piping 53. Then, as shown in Fig.

Then, the process proceeds to step S22, where the dust collection control processing section 7E determines whether the read turbidity T exceeds the upper turbidity threshold value UT. If T> UT, It is determined that a large number of images are included, and the process proceeds to step S23. After the number of correction N is increased by "1", the process proceeds to step S24.

In step S24, the dust collection control processing section 7E calculates the correction current IHa by multiplying the correction number N by a reference correction current I set in advance, and then proceeds to step S25 to calculate the correction current IHa And outputs it to the adder 7G. Then, the process proceeds to step S26.

In step S26, the dust collection control processing section 7E determines whether or not the correction number N reaches the preset number of correction limit Ns. If N <Ns, the process returns to step S21, Ns, it is determined that the turbidity T is not improved even if the current correction is performed, and the process proceeds to step S27, where the output of the correction current IHa is stopped, and the process proceeds to step S28. Note that the correction limit number Ns is calculated by adding a value obtained by multiplying the steady current based on the current command value IHt of the current generator 7F by the reference correction current I and the correction limit number Ns, And the value after the addition is set so as not to exceed the predetermined current threshold value.

In step S28, the dust collection control processing section 7E starts the cyclone apparatus 7C performing the PM collection process, then proceeds to step S29, clears the correction number N to "0", and then returns to step S21 come.

On the other hand, when the determination result of step S22 is T? UT, the dust collection control processing unit 7E determines that the turbidity of the recovered seawater recovered from the seawater scrubber 9 is normal (normal), and shifts to step S30.

In the step S30, the dust-collecting control processor 7E determines whether or not the correction current IHa has been output during the previous processing. If the correction current IHa has not been output during the previous processing The process returns to the step S21 as it is, and when the correcting current IHa has been outputted in the previous process, the process proceeds to the step S31. In step S31, the dust collecting control processor 7E stops the output of the correction current IHa, then proceeds to step S32 to clear the above-described correction number N to "0", and then returns to step S21 come.

The monitoring process of the operation status of the dust collecting apparatus executed by the electric dust collector control unit 7B will be described in detail with reference to the flowchart of FIG.

7, in step S41, the dust collection control processing unit 7E determines the PM concentrations C1, C2, and C3 detected by the first, second, and third laser analyzers LA1, LA2, and LA3, .

Subsequently, the process proceeds to step S42, where the dust collection control processing section 7E determines whether the PM concentration C3 detected by the third laser analyzer LA3 exceeds the predetermined PM concentration threshold value Cth If C3> Cth state continues for a predetermined time, it is determined that there is an abnormality in the electric dust collector 7, and the process proceeds to step S43. In step S43, the dust collection control processing unit 7E transmits the electric dust collection apparatus abnormality information to the system management unit 71 via the network NW, and then proceeds to step S44.

Further, when the determination result of step S42 is C3? Cth or when the continuation of C3> Cth state has not reached the predetermined time, the process directly goes to step S44. In step S44, the dust collection control processing unit 7E determines whether or not the first PM concentration C1, the second PM concentration C2, and the third PM concentration C3 are decreasing in this order. The determination is to determine whether or not the laser analyzers LA1, LA2, and LA3 are normal (normal). If C1> C2> not C3, there is a possibility that there is an abnormality in the laser analyzer deviating from the condition, and the process proceeds to step S45. In step S45, the dust collection control processing unit 7E increments the abnormality continuation time variable Na by "1" and then proceeds to step S46. When the abnormality continuation time variable Na reaches the preset threshold value Nas, Is reached. If the determination result is Na &lt; Nas, the process proceeds to step S49. If Na = Nas, it is determined that there is an abnormality in the laser analyzer, and the process proceeds to step S47. In step S47, the dust collection control processing unit 7E transmits the laser analyzer abnormality information to the system management unit 71 via the network NW, and then proceeds to step S49.

On the other hand, when the determination result in step S44 is C1> C2> C3, or when the continuation time in a state other than C1> C2> C3 has not reached the predetermined time, the process proceeds to step S48, The abnormality continuation time variable Na is cleared to "0 &quot;, and the process proceeds to step S49.

In step S49, the dust collecting control processor 7E reads the current IH (n) and then proceeds to step S50 to determine whether or not the read current IH (n) is within the normal range If it is outside the normal range, the process proceeds to step S51 to transmit the current abnormality information indicating the abnormality of the current generation section 7F to the system management section 71 via the network NW, and then the process proceeds to step S52 .

When the current IH (n) is normal in the determination result of step S50, the process directly goes to step S52.

In step S52, the dust collection control processing section 7E determines whether or not the cyclone device 7C has been started and the PM collection process has been completed. When the determination result indicates that the PM collection process has not been completed, the process returns to step S41. If the determination result in step S52 indicates that the PM collection process has ended, the process proceeds to step S53, and the dust collection control processing unit 7E determines whether or not the predetermined time has elapsed after the PM collection process is completed. When the determination result indicates that the predetermined time has not elapsed, the dust collection control processing unit 7E waits until a predetermined time elapses. When the determination result of step S53 indicates that the predetermined time has passed, the process proceeds to step S54.

In step S54, the dust collection control processing unit 7E reads the PM collection rate DCE calculated in the dust collection feed forward control process of FIG. 5 and then proceeds to step S55 to determine whether or not the read-out PM collection rate DCE It is determined whether or not the dust collection rate is lower than a preset lower dust collection rate limit LL. When the determination result is DCE? LL, the dust collection control processing unit 7E determines that the electric dust collecting apparatus main body 7A is normal and proceeds to step S56. In step S56, the dust collection control processing unit 7E resets the timer to be described later, and then returns to step S41.

On the other hand, when the determination result of step S55 is DCE <LL, the dust collection control processing section 7E determines that the PM collection rate is abnormally lowered and proceeds to step S57. In the step S57, it is determined whether or not the dust collection control processing unit 7E is setting a timer. When the result of the determination indicates that the timer is not set, the process proceeds to step S58, and the process proceeds to step S59 after the dust collecting control processor 7E sets the timer. When the timer is set, the process directly proceeds to step S59.

In step S59, the dust collection control processing unit 7E determines whether or not the timer has timed up. When the time has not elapsed, the process returns to step S54. When the time has elapsed, the process proceeds to step S60. In the above step S60, the dust collection control processing unit 7E returns the PM dust reduction rate abnormality information indicating the PM collection rate lowering abnormality to the system management unit 71 via the network NW, and then returns to the step S41.

Next, the operation of the dust collecting apparatus main body 7A will be described in more detail with reference to the dust collecting feed forward control process of Fig. 5, the dust collecting feedback process of Fig. 6, and the operation status monitoring process of the dust collecting apparatus of Fig.

As described above, in the dust collecting control processing section 7E, by performing the dust collecting forward control processing shown in Fig. 5, the laser analyzer LA1 and LA2 arranged on the inlet side and the outlet side of the electric dust collecting apparatus main body 7A (1) is calculated on the basis of the detected PM concentrations (C1 and C2) to calculate the PM collection rate (DCE).

When the calculated dust collection rate DCE is equal to or larger than the PM dust collection threshold value DCEth, the dust collection control processing unit 7E determines that the dust collection of the PM by the dust collector main body 7A is normally performed, And supplies the current command value IHt generated by the command value generation unit 7D to the current generation unit 7F as it is. The electric current generator 7F supplies a current corresponding to the current command value IHt to the main body 7A of the electric dust collector 7A so that the electric current is supplied to the discharge electrode 18 of the electric dust collector main body 7A, 20 and the casing electrode 21 with the discharge electrode 18 as the cathode side.

Therefore, when a PM-containing gas is supplied as a swirl gas between the discharge electrode 18 and the cylindrical electrode 20, the PM contained in the PM-containing gas is charged by the corona discharge. Then, a Coulomb force acts on the PM by the electric field between the discharge electrode 18 and the cylindrical electrode 20, and the PM starts to move toward the cylindrical electrode 20. The PM passes through the through hole 20a of the tubular electrode 20 as it is by the inertia force and flows into the trapping space 22 which is a half closed space between the tubular electrode 20 and the casing electrode 21 Guided.

In the trapping space 22, since the flow field is very gentle, the PM is hardly influenced by the flow field, and PM is an electric image force due to a potential difference between its own charge and the cylindrical electrode 20 and the casing electrode 21 And is collected and collected on the outer peripheral surface of the tubular electrode 20 and the inner peripheral surface of the casing electrode 21.

It can be considered that the PM concentration in the PM containing gas temporarily increases when the PM collecting rate DCE drops and falls below the PM collecting rate threshold value DCEth while the collecting state of the PM continues . In this case, the process proceeds from step S3 to step S4 in Fig. 5, and the dust collection control processing section 7E increments the number of correction N by "1" and then multiplies the correction number N by the reference correction value I As the correction current IHa, and supplies the calculated correction current IHa to the adder 7G.

The correction current IHa is added to the current command value IHt output from the current command value generator 7D to increase the current IH generated in the current generator 7F.

At this time, the correction current IHa gradually increases while the PM collection rate DCE is lower than the PM collection rate threshold value DCEth. However, the increase of the correction current IHa is set so as not to exceed the predetermined current threshold value. This can prevent a spark (short-circuit) between the discharge electrode 18 and the cylindrical electrode 20 from occurring due to the increase in the current IH.

If the PM dust collection rate is restored by the increase of the current due to the correction current IHa, the process proceeds from step S3 to step S11 and proceeds to step S12, whereupon the dust collection control processing section 7E outputs the correction current IHa Lt; / RTI &gt; Subsequently, the process proceeds to step S13, and the dust collection control processing unit 7E clears the correction number N to zero. Therefore, the addition of the correction current IHa to the current command value IHt in the adder 7G is eliminated. For this reason, the current generating section 7F returns to a state of supplying a steady current based on the current command value IHt.

However, even if the current supplied from the current generating section 7F is increased by repeating the increase of the correction current IHa, the state in which the PM collecting rate DCE falls below the PM collecting rate threshold value DCEth continues, The dust collection control processing unit 7E determines that the PM collection rate DCE is lowered due to the increase in the amount of collected PM in the trapping space 22 when the number N of the dust collection control unit 7 reaches the preset correction number threshold value Ns do. Therefore, the process proceeds from step S7 to step S8, whereupon the dust collection control processing section 7E stops the output of the correction current IHa and then proceeds to step S9 to start the PM collection process by the cyclone device 7C.

The dust collection feedforward control process is controlled so that the dust collection rate DCE of the electric dust collector main body 7A is equal to or greater than the dust collection rate threshold value DCEth.

For reference, when the turbidity T read by the dust collection control processing section 7E exceeds the upper turbidity threshold value UT even when the PM dust collection rate DCE is equal to or larger than the PM dust collection threshold value DCEth, The dust collecting device control unit 7B executes the dust collecting feedback control process of Fig. That is, the dust-collection feedback control processing is executed prior to the dust-collection feedforward control processing.

Further, in the operating state of the main body 7A of the electric dust collector, the monitoring of the operating condition of the dust collecting apparatus shown in Fig. 7 is executed. Therefore, when the state in which the PM concentration C3 detected by the third laser analyzer LA3 installed on the outlet side pipe of the seawater scrubber 9 exceeds the PM concentration threshold value Cth for a predetermined period of time, The processing unit 7E determines that an abnormality has occurred in the electric dust collector 7 and the electric dust collector abnormality information is transmitted to the system management unit 71. [ When the PM concentrations C1, C2, and C3 detected by the three laser analyzers LA1, LA2, and LA3 are not set to small values in this order, the dust collection control processing unit 7E performs the laser analysis LA1, LA2, and LA3, and transmits the laser analyzer abnormality information to the system management unit 71. [

When the current IH supplied by the current generating section 7F deviates from the predetermined upper limit range, the dust collection control processing section 7E performs the short circuit, ground fault, It is determined that an occurrence of a ceiling (sky fault) has occurred, the current supply to the main body 7A of the electric dust collector is stopped, and at the same time, the current abnormality information is transmitted to the system management unit 71.

For reference, in the dust collection control processing section 7E, in addition to the dust collection feedforward control process, the dust collection feedback control process, and the operation status monitoring process of the dust collecting device, the operation data consisting of the PM collection rate DCE and the correction current IHa, To the system management unit (71). Therefore, the movable data of the electric dust collector 7 can be accumulated by accumulating these movable data received by the system management unit 71 in the data accumulation unit 72. [

When the recovery of the PM collection rate (DCE) is not observed for a predetermined time immediately after the completion of the above-mentioned PM collection process, the dust collection control processing section (7E) Dust collection rate reduction abnormality occurs and it is determined that maintenance of the electric dust collector 7 is necessary and the maintenance information of the electric dust collector 7 is transmitted to the system management unit 71. [

As described above, the dust collecting control processing unit 7E monitors the various abnormalities and maintenance times of the electric dust collecting apparatus 7 by monitoring the operation of the dust collecting apparatus, and outputs the abnormal information and the maintenance information And transmits it to the system management unit 71. Accordingly, the system management unit 71 can display the abnormality information or the maintenance information on the display unit 74 or generate an alarm, and further, the system management unit 71 can store the history of the occurrence of the abnormality It becomes.

Next, the seawater scrubber 9 for treating the exhaust gas after being discharged from the electric dust collector 7 will be described.

The exhaust gas from which the PM discharged from the electric dust collector 7 is removed is supplied to an economizer 8 to be heat-exchanged to recover exhaust heat and then supplied to the seawater scrubber 9. [

The seawater scrubber 9 is supplied with the exhaust gas discharged from the economizer 8 through the piping 10 in the middle of the cylindrical container 9A. A plurality of injection nozzles 9B for injecting seawater into the exhaust gas are provided inside the upper portion of the tubular container 9A and SOx is removed from the exhaust gas by seawater sprayed from the injection nozzle 9B .

The seawater containing the SOx is stored in the lower portion of the cylindrical container 9A and the seawater containing the stored SOx is sent to the seawater component adjuster 9C to adjust the components and then to the seawater scrubber 9) to be circulated. The amount of seawater jetted from the jetting nozzle 9B of the seawater scrubber 9 is controlled by the scrubber control unit 9E. For reference, the seawater whose component has been adjusted by the seawater component adjustment section 9C is not circulated by the seawater circulation section 9D that receives the circulation stop command from the seawater component control section 9F, .

Here, the specific configuration of the seawater component adjustment section 9C and the seawater circulation section 9D is configured as shown in Fig. That is, the seawater component adjustment section 9C includes an electrolysis processing section 31 for supplying recovered seawater containing SOx recovered from the lower part of the cylindrical vessel 9A of the seawater scrubber 9 and separating the oil by electrolysis, A pH adjusting unit 32 for adjusting the pH of the recovered seawater separated by the electrolytic treatment unit 31 and a water quality measuring unit 32 for measuring the quality of the pH adjusted recovered seawater discharged from the pH adjusting unit 32 33, and a scale removing unit 34 for removing a scale sticking to the inside of the pipe.

The pH-adjusted recovered seawater discharged from the pH adjusting unit 32 is sent to the seawater circulating unit 9D. The seawater circulation unit 9D includes a scrubber tank 41 for storing the adjusted recovered seawater discharged from the seawater component adjustment unit 9C and a ballast tank 41 for injecting seawater to adjust the seawater when the load of the ship is small And a tank (42). For reference, the recovered seawater whose pH is adjusted in the pH adjusting section 32 is discharged to the outside of the sea without being circulated by the seawater circulation section 9D that receives the circulation stop command from the seawater component control section 9F do.

The seawater circulation unit 9D also pressurizes the seawater in the scrubber tank 41 and the ballast tank 42 to the injection nozzle 9B of the seawater scrubber 9 through the electromagnetic switching valves 43 and 44 And a circulation pump 45 for feeding the gas.

The seawater circulation unit 9D also includes a pump 47 for ballast tanks for pumping seawater in the sea through the filter 46 to the ballast tank 42. [ The seawater pumped up by the pump 47 for the ballast tank is selectively supplied to the scrubber tank 41 and the ballast tank 42 through the electromagnetic opening / closing valves 48 and 49.

The seawater circulation unit 9D further includes electromagnetic open / close valves 50 and 51 for selectively supplying the recovered seawater discharged from the seawater component adjustment unit 9C to the scrubber tank 41 and the ballast tank 42 have.

The electromagnetic opening / closing valves 43, 44, 48, 49, 50, and 51 are opened and closed by the scrubber control unit 9E. Further, the scrubber control unit 9E executes a scrubber control process, which will be described later, to control the SOx removal rate to be removed by the seawater scrubber 9 within a predetermined range.

A flow meter 54 is provided on the piping to be sent from the seawater circulation section 9D to the seawater scrubber 9. [

The pH-adjusted recovered seawater discharged from the pH adjusting section 32 of the seawater component adjusting section 9C is sent to the seawater circulating section 9D. For reference, before the circulating pump 51 supplies the circulated water to the seawater scrubber 9, the circulating pump 9D is provided with a drain pipe 52 as a route that can be drained into the outside sea, An electromagnetic opening / closing valve 53 is provided. For this reason, by the command from the seawater component control unit 9F, the recovered seawater is circulated to the seawater scrubber by the circulation pump 45 or drained into the outside sea . In this case, the seawater component control unit 9F can open and close the electromagnetic opening / closing valve 53 to select either the inflow of the recovered seawater into the circulation pump 45 or the drain into the outside sea have.

On the other hand, the water quality measurement section 33 described above includes an oil concentration meter 56 for measuring the oil concentration in the recovered seawater mixed with the oil mist in the exhaust gas of the recovered seawater connected to the pipe 55 in the seawater component adjustment section 9C, a pH meter 57 for measuring the pH, and a turbidimeter 58 for measuring the concentration of the turbid component such as sold-out in the recovered seawater. Among these, each measurement value measured by the oil concentration meter 56, the pH meter 57 and the turbidimeter 58 is transmitted to the seawater component control unit 9F through an arbitrary transmission system. Further, the measurement value measured by the turbidimeter 58 is also transmitted to the electric dust collector control unit 7B through an arbitrary transmission system.

The seawater component control unit 9F performs the electrolysis process of the electrolysis process unit 31 so that the oil concentration in the recovered seawater is within the set range based on the oil concentration of the seawater in the pipe 55 measured by the oil concentration meter 56 And outputs a current command value Se for controlling the current. That is, the seawater component control unit 9F determines whether or not the oil concentration in the seawater is within the set range, and outputs the current command value Se to be controlled by the reference electrolysis processing current set in advance within the set range. When the oil concentration is out of the set range, the seawater component control unit 9F sets the current command value Se for increasing the reference electrolysis treatment current to improve the electrolysis treatment capacity so that the oil concentration is within the set range Output.

In addition, the seawater component control unit 9F determines whether or not the pH measurement value of the seawater in the pipe 55 measured by the pH meter 57 is within the set range. When the pH measurement value is within the set range, and outputs a pH adjusting agent closing instruction value Sp for controlling the amount of the pH adjusting agent supplied to the pH adjusting unit 32 according to the pH measurement when the pH exceeds the setting range. For reference, as the pH adjustment treatment performed by the pH adjustment unit 32, the input amount of a neutralizer made of sodium hydroxide, potassium hydroxide, etc. or a strong base produced by electrolysis or electrodialysis is set to a pH adjuster injection command value Sp ).

The seawater component control unit 9F executes the seawater component control process shown in Fig. The seawater component control process first reads the oil concentration OC measured by the oil concentration meter 56 and the pH measured by the pH meter 57 in step S61 and then shifts to step S62.

In step S62, the seawater component control unit 9F determines whether or not the oil concentration OC exceeds the preset upper limit threshold value OCth. When OC &lt; = OCth, it is determined that the oil concentration in the recovered seawater recovered from the seawater scrubber 9 is normal and the process proceeds to step S66 described later. When OC> OCth, it is determined that the oil concentration is high The process proceeds to step S63 to increase the correction coefficient Ne by "1" and then proceeds to step S64. In step S64, the seawater component control unit 9F determines whether or not the reference value Seb of the electrolysis current command value Se for the electrolysis processing unit 31 is a value obtained by multiplying the correction coefficient Ne by the predetermined value? Is calculated as an electrolysis current command value Se (Se = Seb + Ne?? Se).

Subsequently, the process proceeds to step S65, where the seawater component control unit 9F outputs the electrolysis current command value Se to the electrolysis processing unit 31, and then proceeds to step S66.

In step S66, the seawater component control unit 9F judges whether the pH measured by the pH meter 57 is lower than the lower limit threshold value LpH which is the acidic acid side than the neutralization point preset in advance, It is determined whether or not it is within the permissible range of the upper limit value UpH. When the determination result is LpH? PH? UpH, it is determined that the pH in the recovered seawater recovered from the seawater scrubber 9 is normal, and the process returns to step S61.

On the other hand, when the determination result of step S66 is that the pH is outside the allowable range, the process proceeds to step S67, and the seawater component control unit 9F determines whether or not pH <LpH. When the determination result is that pH <LpH, the process proceeds to step S68, and the seawater component control unit 9F refers to the input amount calculation map showing the relationship between the pH and the input amount of the pH adjuster based on the current pH, Tp) is calculated, and the process proceeds to step S69. In the step S69, the seawater component control unit 9F outputs the pH adjusting agent input instruction value Sp to the pH adjusting unit 32 for controlling the input amount Tp of the pH adjusting agent to be calculated, and then returns to the step S61.

Further, when the determination result of step S67 is pH> UpH, the process returns to step S61 as it is.

Further, in the seawater component control unit 9F, scale removal processing shown in Fig. 10 is executed to prevent clogging of piping due to scale. The recovered seawater passing through the piping contains marine organisms, microorganisms, scales such as calcium and magnesium. Therefore, if these are slowly attached to the pipe, the pipe becomes clogged. Therefore, in order to remove such a scale, the sea-scale component control unit 9F executes the scale-removing process in the scale removal unit 34 of the sea-water component adjustment unit 9C.

The scale removal processing is executed as a timer interrupt process at predetermined time intervals. 10, first, in step S71, the seawater component control unit 9F determines whether or not the seawater flow rate Qw discharged (discharged) from the circulation pump 45, as measured by the flow meter 54, And then proceeds to step S72.

In step S72, the seawater component control unit 9F determines whether the seawater flow rate Qw is lower than a predetermined lower limit threshold value Qwth. When the result of the determination is Qw? Qwth, it is determined that the scale amount in the pipe 55 is normal and the process proceeds to step S76 to clear the correction coefficient Nf to be described later to "0" &Lt; Qwth, it is determined that a large amount of scale is attached to the pipe 55, the process proceeds to step S73, and the correction coefficient Nf is increased by "1"

In step S74, the seawater component control unit 9F determines whether the value of the reference value Seb of the electrolysis current command value Se for the electrolysis processing unit 31 is a value obtained by multiplying the correction coefficient Nf by the predetermined value? Is calculated as an electrolysis current command value Se (Se = Seb + Nf ·? Se).

Subsequently, the process proceeds to step S76, where the seawater component control unit 9F outputs the electrolysis current command value Se to the scale removal unit 34 provided at an arbitrary place on the pipe 55, and then, in step S71 .

Thus, in the scale removing unit 34, the scale sticking to the pipe can be removed by electrolysis.

In addition, the seawater component control unit 9F executes the operating condition monitoring process for monitoring the operating status of the seawater component adjustment unit 9C. The operation status monitoring process is executed as a timer interrupt process at predetermined time intervals. 11, first, in step S81, the seawater component control unit 9F calculates the oil concentration OC measured by the oil concentration meter 56 and the oil concentration OC measured by the flow meter 54 The sea water flow (Qw) is read. Then, the process proceeds to step S82, and the seawater component control unit 9F determines whether or not the oil concentration exceeds the preset upper limit threshold value OCth.

When the result of determination is OC &lt; = Oth, the process proceeds to step S83, and the seawater component control unit 9F determines whether the seawater flow rate Qw is lower than a predetermined lower limit threshold value Qwth.

When the result of the determination is Qw &gt; = Qwth, the electrolysis processing unit 31 is determined to be normal, and the process proceeds to step S90. In step S90, the seawater component control unit 9F clears the variable No to "0" and then proceeds to step S91.

On the other hand, when the determination result of step S82 is OC &gt; OCth, the process proceeds to step S84. Further, even when the determination result of step S83 is Qw &lt; Qwth, the process proceeds to step S84.

In step S84, the seawater component control unit 9F reads the electrolysis current command value Se to the electrolysis processing unit 31, stores it in a storage unit such as a RAM, and then proceeds to step S85.

In step S85, the seawater component control unit 9F increments the variable No for counting time by "1", and then proceeds to step S86. In step S86, the seawater component control unit 9F determines whether or not the variable No is equal to or greater than a predetermined number Nos set in advance. If the result of the determination is No &lt; Nos, the process directly proceeds to step S91 described later, and when No is No, the process proceeds to step S87. In step S87, the seawater component control unit 9F reads the electrolysis current command value Se of the predetermined number of times (Nos) stored in the storage unit and determines whether or not the electrolysis current command value Se is increased . When the electrolysis current command value Se is increased, it is determined that an abnormality has occurred in the electrolytic processing section 31, and the process proceeds to step S88.

In step S88, the seawater component control unit 9F transmits the abnormality information of the electrolysis processing unit to the system management unit 71, and then the process proceeds to step S91.

If the electrolytic current command value Se is not increased as a result of the judgment in the step S87, the seawater component control section 9F judges that an abnormality has occurred in the seawater component control process, and the process proceeds to the step S89 . In step S89, the seawater component control unit 9F transmits the seawater component control process abnormality information to the system management unit 71, and then proceeds to step S91.

In step S91, the seawater component control unit 9F reads the pH measured by the pH meter 57, and then proceeds to step S92. In step S92, the seawater component control unit 9F determines whether or not the pH is smaller than the lower limit threshold value LpH which is smaller than the neutralization point set in advance. The seawater component control unit 9F determines that the pH of the recovered seawater recovered from the seawater scrubber 9 is close to the acidity when the determination result is that pH <LpH, The pH adjuster injection command value Sp for the pH adjustment agent is read and stored in the storage unit such as the RAM, and the process proceeds to step S94.

In step S94, the seawater component control unit 9F increments the variable Np by "1", and then proceeds to step S95. In step S95, the seawater component control unit 9F determines whether or not the variable Np is equal to or greater than the predetermined number of times (Nps). If Np &lt; Nps, the timer interrupt processing is finished and the program is returned to the predetermined main program .

When the determination result of step S95 is Np? Nps, the process proceeds to step S96. In step S96, the seawater component control unit 9F reads the pH adjuster input instruction value Sp of the predetermined number (Nps) stored in the storage unit and determines whether the pH adjuster input instruction value Sp is increased . When the pH adjusting agent dosing command value Sp is increased, it is determined that an abnormality has occurred in the pH adjusting section, and the process proceeds to step S97. In step S97, the seawater component control unit 9F transmits the pH adjustment unit abnormality information to the system management unit 71, terminates the timer interrupt process, and returns to the predetermined main program.

When the pH adjuster injection instruction value Sp is not increased as a result of the judgment in the step S96, the seawater component control section 9F judges that an abnormality has occurred in the seawater component control process, and the process proceeds to the step S98. In step S98, the seawater component control unit 9F transmits the seawater component control process abnormality information to the system management unit 71, terminates the timer interrupt process, and returns to the predetermined main program.

Further, when the determination result of step S61 is pH? LpH, the seawater component control unit 9F determines that the pH adjustment unit 32 is normal and proceeds to step S68. In step S68, the seawater component control unit 9F clears the variable Np to "0 ", terminates the timer interrupt process, and returns to the predetermined main program.

In this way, by performing the operational status monitoring process in the seawater process control section 9F, it is possible to detect an abnormality in the electrolytic process section 31, the pH adjusting section 32 and the seawater component control process. Further, when the seawater processing control section 9F detects such an abnormality, the system management section 71 can process the abnormal information by sending the abnormal information to the system management section 71 described later.

The seawater used in the seawater scrubber 9 is recovered by the seawater component control unit 9F after being used by the seawater scrubber 9 and is discharged from the inside of the ship It is used in circulation. However, if any of the oil concentration (OC), pH, and turbidity (T) contained in the circulating seawater exceeds the drainage regulation value predetermined by the environmental regulations, the circulating seawater can no longer flow into the outside sea It becomes impossible to drain.

Therefore, in order to avoid such a situation, the seawater component control unit 9F performs the circulating seawater monitoring process. The seawater component control unit 9F drains a part of the circulating seawater into the outside sea before any numerical value of the oil concentration (OC), pH, turbidity (T) in the circulating seawater exceeds the prescribed range, The circulating water monitoring process is performed so as to prevent the situation that each numerical value of the circulating seawater exceeds the specified range.

12, in step S101, the oil concentration OC measured by the oil concentration meter 56 is measured by the pH meter 57 After reading the turbidity T detected by the pH and turbidimeter 58, the process proceeds to step S102.

In step S102, the seawater component control unit 9F continues the predetermined period of time in a state in which the oil concentration OC, the pH, or the turbidity T exceeds the predetermined upper limit thresholds (OCth, LpH, UT) Or not.

When any one of OC &gt; OCth, pH &lt; LpH, or T &gt; UT state continues for a predetermined time, the seawater component control unit 9F may not be able to drain the circulated seawater into the sea The process proceeds to step S103. For reference, if none of OC> OCth, pH <LpH or T> UT states continues for a predetermined time, the seawater component control unit 9F directly returns to a predetermined main program.

For reference, the upper threshold value OCth, the upper threshold value LpH, and the upper threshold value UT are values that do not exceed the drainage regulation value that makes it impossible to discharge the circulating seawater into the sea, (For example, 90% of the drainage regulation value, etc.).

In step S103, the seawater component control unit 9F transmits a drain command for draining the circulating seawater to the outside through the drain pipe 52 to the electromagnetic opening / closing valve 53 of the seawater circulation unit 9D, .

In step S104, the seawater component control unit 9F transmits a scoop instruction to the scrubber control unit 9E to pump the seawater from the sea through the filter 46 by the ballast tank pump 47, and returns to step S105 .

In step S105, the seawater component control unit 9F determines whether or not a predetermined time has elapsed since the start of the drainage process in step S103 and the sea water flushing process in step S104. As a result of the determination, if the predetermined time has not elapsed, the process waits until a predetermined time elapses. As a result of the determination in step S105, when the predetermined time has passed, the process proceeds to step S106.

In step S106, the seawater component control unit 9F detects the oil concentration (OC), pH, or turbidity (T) in the circulating seawater, and proceeds to step S107. In step S107, it is determined whether or not the oil concentration OC, the pH, and the turbidity T fall below the respective upper limit threshold values OCth, LpH, and UT by the drainage process of step S103 and the sea water flushing process of step S104 . When the oil concentration OC, the pH and the turbidity T do not fall below the respective upper limit threshold values (OCth, LpH, and UT) in the above determination result, the process waits until the oil concentration OC becomes lower. When the oil concentration OC, the pH and the turbidity T fall below the respective upper limit threshold values OCth, LpH and UT, the process proceeds to step S108.

In step S108, the seawater component control unit 9F transmits a drain stop command to stop the drainage process to the electromagnetic opening / closing valve 53 of the seawater circulation unit 9D, and then the process proceeds to step S109. In step S109, the seawater component control unit 9F sends a scooter stop command for stopping the scooping process by the ballast tank pump 47 to the scrubber control unit 9E, and returns to the predetermined main program.

The exhaust gas discharged from the upper portion of the tubular container 9A of the seawater scrubber 9 is supplied to the piping 81 provided with a third laser analyzer LA3 as an exhaust gas component detecting section for detecting a component contained in the exhaust gas And discharged from the chimney 83 through the silencer 82 into the atmosphere. Third laser spectrometer (LA3) detects the PM concentration in the exhaust gas, SO ₂ concentration and the CO ₂ concentration. For reference, a laser analyzer capable of detecting the NOx concentration and the ammonia concentration may be provided in order to monitor the operating state of the denitration apparatus. In addition, a laser analyzer may be installed on the inlet side and the outlet side pipes of the denitration device 5. [

Next, the configuration of the first to third laser analyzing systems LA1 to LA3 will be described.

The first laser analyzer LA1 has the configuration shown in Fig. That is, the first laser analyzer LA1 is a laser analyzer of frequency modulation type, and is a PM concentration detection analyzer having a light source unit 104 having a laser element for generating visible region laser light for detecting the PM concentration. The first laser analyzer LA1 is fixed to the walls 201 and 202 of the pipe through which the exhaust gas passes by welding or the like by the flanges 101a and 101b. A transparent emission window (emission window) 101c is provided on one flange 101a. The flange 101a is attached with a cylindrical cover 103a of a user type (bottomed with bottom) through a mounting seat 102a.

A light source unit 104 is disposed inside the cover 103a. The light source unit 104 includes a laser element for generating visible light laser light for detecting PM. The laser light emitted from the light source unit 104 is collimated by the light source side optical system including the collimator lens 105 into parallel light and passes through the center of the flange 101a and passes through the emission window 101c through the wall 201, 202 (inside of the year). The parallel light is absorbed and scattered when it passes through the measurement target exhaust gas inside the walls 201 and 202.

A cylindrical cover 103b of the user type is attached to the flange 101b on the other side through an attachment sheet 102b. Further, a transparent incidence window (incidence window) 101d is provided on the flange 101b. The parallel light that has passed through the inside of the flame is condensed by the condenser lens 106 which is the light receiving side optical system inside the cover 103b via the incident window 101d and is received by the light receiving section 107. [ In the light receiving section 107, the condensed light is converted into an electric signal, and the electric signal is inputted to the signal processing circuit 108 in the rear stage. The signal processing circuit 108 is connected to a central processing unit 109 as an arithmetic processing unit.

The second laser analyzer LA2 has the configuration shown in Fig. That is, the second laser spectrometer (LA2) is a laser analyzer of the frequency modulation method, and a PM concentration detection analyzer 111 and the SO ₂ concentration analyzer (112). The analyzer 111 for PM concentration detection has a light source unit 111a having a laser element for generating visible region laser light for detecting the PM concentration. The SO ₂ concentration detection analyzer 112 has a light source portion 112a having a laser element for generating an extreme ultraviolet region laser light for detecting the SO ₂ concentration. Each of the PM concentration detection analyzer 111 and the SO ₂ concentration detection analyzer 112 has the same configuration as that of the first laser analyzer LA1 described above.

The third laser analyzer LA3 has the configuration shown in Fig. That is, the third laser spectrometer (LA3) is a laser analyzer of the frequency modulation method, and a PM concentration detection analyzer 121 and the SO ₂ concentration detection analyzer 122 and the CO ₂ concentration detection analyzer for 123 have. The PM concentration detection analyzer 121 is provided with a light source section 121a having a laser element for generating visible region laser light for detecting PM. The SO ₂ concentration detection analyzer 122 is provided with a light source section 122a having a laser element for generating an extreme ultraviolet region laser light for detecting the SO ₂ concentration. The analyzer 123 for CO ₂ concentration detection has a light source section 123a having a laser element for generating a near infrared region laser light for detecting a CO ₂ concentration. The respective constitutions of the PM concentration detection analyzer 121, the SO ₂ concentration detection analyzer 122 and the CO ₂ concentration detection analyzer 123 are the same as those of the first laser analyzer LA 1 described above.

Next, the scrubber control section 9E of the exhaust gas processing control section EGC will be described.

The scrubber control unit 9E is provided with a pipe flow rate value Qw detected by a flow meter 54 for detecting the flow rate of seawater discharged from the circulation pump 45 and the second laser spectrometer (LA2) SO ₂ concentration detected value (Cs1), is detected by, and the third laser spectrometer (LA3) SO ₂ concentration detection value detected by the arrangement on the outlet side of the water scrubber (9) ( Cs2 detected by the third laser analyzer LA3 and the CO ₂ concentration detection value Cs3 detected by the third laser analyzer LA3.

Scrubber control (9E) is to determine whether or not within the SO ₂ concentration detected value (Cs2) and CO calculation result of the _second concentration detection value _{(Cs3) (= SO 2 /} CO 2) is a preset specified range, the SO ₂ / CO ₂ calculation result exceeds the specified range, the rotation speed of the circulation pump 45 is controlled so as to increase the piping flow rate value Qw. On the other hand, when the SO ₂ / CO ₂ calculation result is less than the specified range, the scrubber control unit 9E controls the rotation speed of the circulation pump 45 so as to decrease the pipe flow rate value Qw. The scrubber control unit 9E outputs a command for increasing or decreasing the rotational speed of the circulation pump 45 to the circulation pump 45 as a seawater scrubber injection command value.

Here, the scrubber control unit 9E will be described in detail. 8, the scrubber control section 9E is provided with an injection control section 61 for controlling the amount of seawater injection from the injection nozzle 9B, And an open / close valve control unit 62 for opening and closing the valve 53.

16, the injection controller 61 includes an SO ₂ concentration command value generator 61a, a subtractor 61b, a feedback controller 61c, a feed forward controller 61d, an adder 61e, And a driving circuit 61f. SO ₂ concentration of the command value generating section (61a), the third laser spectrometer (LA3) a SO ₂ concentration (Cs2) and CO ₂ concentration (Cs3) detected by the is input by performing the operation of the SO ₂ / CO ₂ SO ₂ Thereby creating a concentration target value. Feedback control section (61c) is a subtraction by the SO ₂ concentration (Cs2) is detected by the generated SO ₂ concentration target value (Cst) and the third laser spectrometer (LA3) in subtractor (61b) concentration variation (ΔCs) is input For example, PID (proportional, integral, differential) feedback control. A feed forward control unit (61d), the second is a SO ₂ concentration (Cs1) is detected by means of a laser spectrometer (LA2) is input performs the feed-forward control. The adder 61e adds the feed forward command value output from the feed forward control unit 61d to the feedback command value output from the feedback control unit 61c. For reference, the SO ₂ concentration command value generator 61a may set an arbitrary SO ₂ concentration target value regardless of the numerical value of the calculation result of SO ₂ / CO ₂ .

The addition output from the adder 61e is supplied to the pump drive circuit 61f for rotationally driving the circulation pump 45 as the seawater scrubber injection command value Jt.

By configuring the injection control section 61 as shown in Fig. 16, the following operation becomes possible.

First, the second laser analyzer LA2 disposed on the outlet side of the electric dust collector 7 (that is, the inlet side of the seawater scrubber 9) is included in the exhaust gas after the PM is removed from the electric dust collector 7 that it is possible to detect the SO ₂ concentration (Cs1). Further, a third laser spectrometer (LA3) is, SO ₂ concentration (Cs2) and CO ₂ concentration (Cs3 contained in the exhaust gas after removal of SOx by the water scrubber (9) placed at the outlet side of the water scrubber (9) Can be detected.

Then, the detected concentration of SO ₂ (Cs2) and CO ₂ concentration (Cs3) is input to the SO ₂ concentration command value generating section (61a). The SO ₂ concentration of the command value generating section (61a), SO ₂ concentrations (Cs2), and performs the operation of SO ₂ / CO ₂ from the CO ₂ concentration (Cs3), on the basis of the calculation result, SO ₂ concentration of the target value (Cst) And outputs it. For reference, the SO ₂ concentration command value generating section (61a), it may be set to any value as the SO ₂ concentration target value (Cst).

In addition, the injection control portion 61. In, is subtracted by the SO ₂ concentration (Cs2) is detected by the third laser spectrometer (LA3) from the SO ₂ concentration target value (Cst) to the subtractor (61b) calculates the density deviation (ΔCs) And supplies the concentration deviation? Cs to the feedback control section 61c. Then, the feedback control section (61c) in, for example, calculated by performing a PID control process, and the third laser spectrometer feedback command value to (LA3) matching the SO ₂ concentration (Cs2) is detected by the SO ₂ concentration target value.

On the other hand, the SO ₂ concentration Cs1 at the inlet side of the seawater scrubber 9 detected by the second laser analyzer LA2 is supplied to the feedforward control section 61d. Accordingly, the feedforward control section 61d can calculate the feed forward command value in accordance with the change in the concentration of SO ₂ on the inlet side of the seawater scrubber 9. [ The injection control unit 61 calculates the seawater scrubber injection command value Jt by adding the feedback command value to the feed forward command value by the adder 61e and outputs the seawater scrubber injection command value Jt to the pump driving circuit (61f). The pump drive circuit 61f rotates and drives the circulation pump 45 based on the seawater scrubber jet command value Jt.

The by As described above, the ejection control section 61, the SO ₂ concentration in the exhaust gas exhausted from, water scrubber (9) and corresponds to the fast-changing (急變) of the SO ₂ concentration (Cs1) at the side entrance to the water scrubber (9) And can be controlled optimally.

In addition, the scrubber control unit 9E executes the monitoring of the operating condition shown in Fig.

The operation status monitoring process is executed as a timer interrupt process at predetermined time intervals. First, in step S111, the scrubber control (9E), the third laser spectrometer (LA3) detecting the SO ₂ concentration (Cs2), sea water scrubber injection command value (Jt), a water flow rate detected by the flow meter 54 by the (Qw). Then, the process proceeds to step S112, the control scrubber (9E) is, it is determined whether the SO ₂ concentration (Cs2) is more than the upper limit SO ₂ concentration (UCs2) set in advance. When the determination result is Cs2 &gt; UCs2, the process proceeds to step S113. In step S113, the process moves the scrubber control (9E), a SO ₂ concentration (Cs2), and then storing the water scrubber injection command value (Jt) and water flow rate (Qw) in the storage unit such as RAM step S114.

In step S114, the scrubber control unit 9E increments the variable Np for counting the continuation time of Cs2 &gt; UCs2 by 1 and then proceeds to step S115. In step S115, the scrubber control unit 9E determines whether or not the variable Np is equal to or larger than a predetermined number (Nps) set in advance. When the determination result is Np &lt; Nps, the scrubber control unit 9E terminates the timer interrupt process and returns to the predetermined main program.

When the determination result of step S114 is Np? Nps, the process proceeds to step S116. Whether the step S116, the scrubber control (9E) has, in that reads the SO ₂ concentration (Cs2) of a specific number (Nps) minutes (分) stored in the storage section, there was a change in the SO ₂ concentration (Cs2) . Scrubber control (9E) is, according to the determination results, if there is no change in the SO ₂ concentration (Cs2) is determined to have occurred at least a second laser spectrometer (LA2) or the third laser spectrometer (LA3), and the operation proceeds to step S117 do. In step S117, the scrubber control unit 9E terminates the timer interrupt process after transmitting the laser analyzer abnormality information to the system management unit 71. [

Further, the determination in step S116 results, when there was a change in the SO ₂ concentration (Cs2), a scrubber control (9E), the first to second laser spectrometer (LA2) or 3 determines that the laser spectrometer (LA3) is normal, and step S118 . In step S118, the scrubber control unit 9E determines whether the seawater scrubber jet command value Jt is increased or not. When the seawater scrubber ejection command value Jt is not increased in the above determination result, the scrubber control unit 9E determines that an abnormality has occurred in the injection control unit 61 and proceeds to step S119. In step S119, the scrubber control unit 9E transmits the jetting control unit abnormality information to the system management unit 71, terminates the timer interrupt processing, and returns to the predetermined main program.

When the seawater scrubber ejection command value Jt is increased in the determination result of step S118, the process proceeds to step S120. In step S120, the scrubber control unit 9E reads the seawater flow rate Qw for the predetermined number of times Np stored in the storage unit, and determines whether the seawater flow rate Qw is increased or not. As a result of the determination, when the seawater flow rate Qw is not increased, the scrubber control unit 9E determines that an abnormality has occurred in the seawater supply system including the circulation pump 45 and proceeds to step S121. In step S121, the scrubber control unit 9E transmits the seawater supply system abnormality information to the system management unit 71, terminates the timer interrupt processing, and returns to the predetermined main program.

When the seawater flow rate Qw is increased in the determination result of step S120, the scrubber control unit 9E determines that the seawater supply system including the circulation pump 45 is normal, It is determined that an abnormality has occurred and the process proceeds to step S122. In step S122, the scrubber control unit 9E transmits the seawater scrubber abnormality information to the system management unit 71, terminates the timer interrupt process, and returns to the predetermined main program.

When the determination result of step S112 is Cs2? Ucs2, the process proceeds to step S123. In step S123, the scrubber control unit 9E clears the variable Np to "0 ", terminates the timer interrupt process, and returns to the predetermined main program.

In this manner, by executing the operation state monitoring process in the scrubber control section 9E, it is possible to prevent the occurrence of an abnormality in the seawater scrubber 9, the occurrence of an abnormality in the seawater supply system including the circulation pump 45, The abnormality of the third laser analyzer LA3 and the abnormality of the injection control unit 61 can be accurately detected. In addition, the scrubber control unit 9E can store the abnormal information in the system management unit 71 by transmitting the abnormal information of each unit (each unit) to the system management unit 71. [

The schematic configuration of the control system of the exhaust gas processing system described above is summarized as shown in Fig.

That is, the exhaust gas processing control section EGC includes an electric dust collector control section 7B and a scrubber control section 9E. The exhaust gas processing control unit EGC and the seawater component control unit 9F are connected to the system management unit 71 via a predetermined network NW.

Here, the electric dust collector control section 7B includes a dust collecting control section 7a including a dust collecting control processing section 7E for performing the dust collecting feedforward control process shown in Fig. 5 and the dust collecting feedback control process shown in Fig. 6, The maintenance period of the electric dust collector 7 is determined based on the frequency of occurrence of the abnormal information and the cumulative operation time of the dust collecting control section and the like, And a first maintenance timing determination unit 7c for transmitting the first maintenance timing determination unit 7c to the first maintenance timing determination unit 7c.

Similarly, the scrubber control unit 9E includes an injection control unit 61 for performing the seawater injection control process, an open / close valve control unit 62 for driving the open / close valve, a movable state monitoring unit 63 for determining the maintenance period of the seawater scrubber 9 based on the frequency of occurrence of the abnormal information and the cumulative operation time of the seawater scrubber 9 and for transmitting the information of the determined maintenance period to the system management unit 71 And a maintenance timing determining section 64. [

The seawater component control unit 9F includes an electrolysis control unit 91 for controlling the electrolysis processing unit 31, a pH control unit 92 for controlling the pH adjustment unit 32, The operation status monitoring section 93 for monitoring the operation status of the electrolytic processing section 31 and the pH adjusting section 32 and the operation status monitoring section 93 for monitoring the operation status of the electrolytic processing section 31 and the pH adjusting section 32, A second maintenance time determination unit 94 for determining the maintenance time of the electrolysis processing unit 31 and the pH adjustment unit 32 that constitute the maintenance time and transmitting the information of the determined maintenance time to the system management unit 71, And a drainage and perforation determining unit 95 for performing circulating seawater monitoring processing shown in FIG. 12 to determine a multiple of circulating seawater and a pump-up of new seawater.

The system management unit 71 receives from the electric dust collector control unit 7B operation data or abnormality information such as the PM collection rate DCE and the correction current IHa indicating the operation status of the electric dust collector, Is transmitted. The system management section 71 also receives from the scrubber control section 9E operational data, such as a seawater scrubber injection command value indicative of the operating state of the seawater scrubber 9, and abnormality information and maintenance information. The system management unit 71 also receives from the seawater component control unit 9F operational data such as an electrolysis current command value Se indicating the operating state of the seawater component processing unit 9C and a pH adjuster closing command value Sp, Or more information is transmitted.

The system management unit 71 also transmits the pH, turbidity, and oil concentration detected by the water quality measurement unit 33 from the seawater component control unit 9F. Further, the system management unit 71 is, PM concentration (C1~C3) from the first to third laser spectrometer (LA1~LA3) as an exhaust gas component detection, SO ₂ concentration (Cs1 and Cs2), and CO ₂ concentration (Cs3) Is transmitted.

In addition, the system management section 71 includes a storage section 72 as a data storage section, a nonvolatile memory 73, a display section 74 such as a liquid crystal display, an alarm sound generation section 75 for generating alarms, (Not shown). The communication control unit (alarm information transmission unit) 76 is connected to the upper control unit 80 of the management company that operates the ship, for example, by connecting to the Internet using satellite communication, and transmits alarm information to the portable information terminal 77, .

In the system management unit 71, the electric dust collector 7, the seawater scrubber 9, and the seawater component adjustment unit 9C are connected to the electric dust collector 7B, the scrubber control unit 9E and the seawater component control unit 9F, The movable data is divided and stored in the storage unit 72 as a data storage unit to accumulate the data.

When the system management unit 71 receives various types of abnormal information from the electric dust collecting apparatus control unit 7B, the scrubber control unit 9E and the seawater component control unit 9F, (Stores) the data in the nonvolatile memory 73 together with the reception time.

In this manner, the system management unit 71 accumulates operation data, abnormality information, and maintenance information indicating the operating state of the marine diesel engine exhaust gas treatment system. Accordingly, the operating state of the electric dust collector 7 and the seawater scrubber 9 constituting the exhaust gas treating system of the marine diesel engine can be accurately grasped.

In addition, it is possible to detect an abnormality in the main body 7A of the electric dust collector, the electric dust collector control part 7B and the exhaust gas component detecting part (first to third laser analyzers LA1 to LA3). Further, since the PM concentration (C1 to C3) and turbidity are stored in the storage section 72, the change in the PM concentration and the turbidity can be easily confirmed. Further, when an abnormality occurs in the electrostatic precipitator 7, the PM concentration detection value and the turbidity detection value for a predetermined time before and after the abnormality content, the abnormality occurrence time, and the abnormality occurrence time are stored in the nonvolatile memory 73, It is possible to conduct the ideal analysis easily and accurately.

The same can be detected for the seawater scrubber 9 as well. Furthermore, since the SO ₂ concentration detection value is stored in the storage section 72, the change in the SO ₂ concentration can be easily confirmed. Further, when obtain specific than the water scrubber (9) occurs, since the above information, stored in the error occurrence time and the SO ₂ concentration detected value, the non-volatile memory 73 during the error occurrence time before and after the predetermined period of time, or more later analysis Can be easily and accurately performed.

Further, since the abnormality information and the maintenance information are transmitted to the upper control unit 80 of the marine vessel operating company, the marine vessel operating company can accurately grasp the operating state of the marine diesel engine exhaust gas treatment system.

1 and 18, the system control unit 71 is provided with a communication control unit (alarm information transmission unit) 76 for connecting to the cellular phone network, so that, at the time of outputting various kinds of alarms, It becomes possible to transmit the alarm information to the terminal 77 via the Internet, for example. Therefore, it is possible to perform processing at the time of occurrence of an error without monitoring the monitor at all times.

Next, the overall operation of the embodiment will be described.

The exhaust gas exhausted from the marine diesel engine 3 is first supplied to the denitration unit 5 and the NOx is removed by mixing air with the urea water in the denitration unit 5 and injecting it into the exhaust gas.

Then, the exhaust gas from which the NOx is removed is supplied to the electric dust collector 7, and the PM contained in the exhaust gas is removed from the electric dust collector main body 7A of the electric dust collector 7. In the electric dust collecting apparatus main body 7A, the PM-containing gas flows from the gas introducing portion 16 of each of the electrode containing portions 15a to 15d into the cylindrical electrode 20 as the swirl flow in the swirling flow forming portion 17 do. When the PM-containing gas passes through the tubular electrode 20, as described above, PM is charged by the corona discharge. The charged PM moves to the trapping space 22 outside the tubular electrode 20 through the through hole 20a of the tubular electrode 20 by the Coulomb force and the outer peripheral surface of the tubular electrode 20 and Is attached to the inner peripheral surface of the casing electrode (21) and collected.

The particulate matter collected in the trapping space 22 is recovered by the cyclone device 7C, is depressurized by a compressor (not shown) at its outlet, and stored in a waste container such as a drum. For reference, a heater may be provided in the trapping space 22, and the trapped PM may be burned by heating with a heater at predetermined time intervals. In this case, the waste vessel is not required, and the cyclone apparatus 7C and the compressor can be omitted, so that the initial cost and the running cost can be reduced.

The exhaust gas from which the PM is removed from the electric dust collector 7 is supplied to the seawater scrubber 9 and seawater is injected into the exhaust gas from the seawater scrubber 9 to remove SOx from the exhaust gas. At this time, in the seawater scrubber 9, seawater containing SOx collects at the bottom of the tubular container 9A. Here, the seawater containing the SOx is recovered by the seawater component adjustment section 9C, and the seawater circulation path is formed by the seawater circulation section 9D to be returned to the seawater scrubber 9.

The ballast tank 42 can be added to the seawater circulation path in the state where the ballast tank 42 is storing the ballast seawater, so that the ballast seawater can be used as seawater for seawater scrubber . Therefore, it is not necessary to separately raise the seawater for the seawater scrubber.

Since the ballast tank pump 47 for pumping the seawater into the ballast tank 42 is also used for pumping the seawater into the scrubber tank 41, it is not necessary to separately install the scrubber pump, The manufacturing cost can be reduced.

8, when the cargo is not loaded in the ballast tank 42, the electromagnetic opening / closing valve 49 is closed and the electromagnetic opening / closing valve 48 is in the open state So that the ballast tank pump 47 is rotationally driven so that seawater is pumped up to the scrubber tank 41 through the filter 46. When the pumping of the predetermined amount of seawater is completed, the electromagnetic opening / closing valve 48 is closed. Then, in a state in which the electromagnetic opening / closing valves 44, 51 and 53 are kept closed, the electromagnetic opening / closing valves 43 and 50 are opened. The seawater stored in the scrubber tank 41 is supplied to the spray nozzle 9B in the tubular container 9A of the seawater scrubber 9 and the spray nozzles 9B ) Functions to remove SOx by injecting seawater into the exhaust gas.

The seawater containing SOx is stored in the bottom of the cylindrical container 9A, which is sent to the seawater component adjustment section 9C. In the seawater component adjustment section 9C, an electrolysis processing section 31 is disposed as shown in Fig. Therefore, the electrolytic treatment section 31 separates the oil mist contained in the exhaust gas and the oil mist received in the seawater. Then, the seawater is sent to the pH adjusting unit 32, and adjusted to a predetermined pH by inputting the pH adjusting agent. The pH-adjusted seawater is returned to the scrubber tank 41.

Therefore, since the seawater pumped up in the scrubber tank 41 is circulated, the amount of seawater consumed in the seawater scrubber 9 can be raised only by the seawater that pumped up the scrubber tank 41. Therefore, since it is not necessary to consume a large amount of seawater, the influence on the environment can be minimized.

In addition, when there are few cargoes, ballast water is pumped up into the ballast tank 42. At this time, the electromagnetic opening / closing valve 48 is closed and the electromagnetic opening / closing valve 49 is opened. In this state, the ballast tank pump 47 is driven so that seawater is stored in the ballast tank 42 through the filter 46. When the accumulation of the ballast water in the ballast tank 42 is completed, the electromagnetic open / close valve 49 is closed and the electromagnetic open / close valves 43, 50 and 53 are closed, 44 and 51 are opened. The ballast water in the ballast tank 42 is supplied to the injection nozzle 9B in the cylindrical container 9A of the seawater scrubber 9 by the circulation pump 45. [ The seawater collected at the bottom of the tubular container 9A is recovered at the seawater component adjustment section 9C and is returned to the ballast tank 42 by the seawater circulation section 9D after performing oil separation and pH adjustment Thereby forming a seawater circulation path.

In this case, since the scrubber tank 41 is not used, it is possible to clean the scrubber tank 41 in the meantime.

In addition, when a state in which the oil concentration (OC), the pH, or the turbidity (T) in the circulating seawater of the seawater circulation path exceeds the upper limit threshold values (OCth, LpH and UT) The seawater component control unit 9F sets the electromagnetic on-off valve 53 provided in the seawater circulation unit 9D to the open state. Thereby, the circulating seawater is drained to the outside through the drainage pipe (52). At the same time, fresh seawater is pumped up by the required amount through the filter 46 from the outside sea by the ballast tank pump 47. Thus, it is possible to prevent the situation in which the oil concentration, the pH, or the turbidity (T) in the circulating seawater exceeds the predetermined drainage regulation value and the circulating seawater can not be drained into the outside sea.

In the electric dust collector 7, the exhaust gas component detecting portion is disposed in the inlet side and the outlet side pipe. The PM concentration detection values C1 and C2 detected by the exhaust gas component detection unit and the turbidity T measured by the turbidimeter 58 are supplied to the electric dust collector control unit 7B. Based on these numerical values, the electric dust collector 7 controls the electric current supplied to the electrode of the electric dust collector main body 7A such that the PM removal rate falls within a specified range.

Similarly, in the seawater scrubber 9, the exhaust gas component detecting portion is disposed in the outlet pipe, so that the SO ₂ concentration and the CO ₂ concentration remaining in the exhaust gas are detected. Then, the detected SO ₂ concentration and CO ₂ concentration are supplied to the scrubber control section 9E. Based on these figures, the scrubber control (9E), by carrying out a calculation process (= SO ₂ / CO _2), and sets the SO ₂ concentration of the specified range to the target, by controlling the rotation speed of the circulation pump 45 , The SO ₂ concentration remaining in the exhaust gas is controlled to fall within the predetermined range of the SO ₂ concentration. The seawater component control unit 9F controls the electrolysis current value of the electrolysis processing unit 31 and the amount of the pH adjuster supplied to the pH adjusting unit 32 based on the detection values of the oil concentration meter 56 and the pH meter 57 And controls the components of the circulating seawater to be in an appropriate state.

In addition, the seawater component control unit 9F controls the current value for electrolysis of the scale removing unit 34 based on the detection value of the flow meter 54 to control the scales sticking in the pipe to be removed.

For reference, in the above embodiment, the case of collecting the particulate matter in the semi-closed space between the cylindrical electrode 20 and the casing electrode 21 has been described with respect to the electric dust collector 7, It is not. In the electric dust collector 7, a discharge electrode and a dust collecting electrode may be provided in the same space, and PM may be charged by the discharge electrode and removed by the dust collecting electrode.

In the above-described embodiment, the case where the PM-containing gas is introduced as the swirling flow by the swirling flow forming section 17 has been described, but the present invention is not limited thereto. When it is desired to reduce the pressure loss by the swirl flow former 17, the PM-containing gas may be passed through as it is without providing the swirl flow forming portion 17.

In the above embodiment, the case where the scrubber control unit 9E for controlling the seawater scrubber 9 controls the concentration of SO ₂ contained in the exhaust gas to be exhausted to a target value is described, but the present invention is not limited thereto. The scrubber control unit 9E may calculate the SOx removal rate corresponding to the PM collection rate DCE and control the SOx removal rate to be within the predetermined range in the same manner as the above-described electric dust collector 7.

In the above embodiment, the electrolytic treatment unit 31 for electrolyzing the recovered seawater to separate the oil is used as the oil separator, but the present invention is not limited thereto. Instead of the electrolytic treatment section 31, a centrifugal separator for separating the recovered seawater by centrifugal separation may be used as the oil separator.

In place of the electrolysis processing section 31, an electronic processing section for electronically treating the recovered seawater and separating the oil may be used. In the electronic processing, a coil connected to a power source is attached to the outside of a pipe through which the recovered seawater passes, and the frequency energy modulated by the electrical signal processing is transferred to the inside of the pipe through the coil, thereby separating the oil in the seawater. In the electronic processing section, it is possible to control the oil separation in the seawater by controlling the voltage and frequency to be sent to the coil. In the case of using the above-described electronic processing unit, only the coil connected to the power supply is required to be attached to the outside of the pipe, and construction is unnecessary, which is advantageous in cost.

In addition to the electrolytic treatment section 31, the centrifugal separation section, or the electronic treatment section, a filter may be further used as the oil separation section. According to this, efficiency of oil separation can be further improved. For reference, only the filter can be used as the oil separator in place of the electrolytic processor 31, but in this case, the control of steps S62 to S65 in Fig. 9 is not performed.

Further, in the above embodiment, the first to third laser analyzers LA1 to 3 have been described as using the direct insertion type laser analyzer, but the present invention is not limited thereto. As the first to third laser analyzers LA1 to 3, a sampling type laser analyzer may be used.

Further, in the above embodiment, the analyzer for detecting PM concentration in the first to third laser analyzers LA1 to 3 includes the laser element for generating the visible region laser light for detecting the PM concentration, It is not. And a laser device for generating near-infrared laser light in place of the visible-region laser light.

In addition, the laser device of the embodiment In the second generation of the laser spectrometer (LA2), and the third laser spectrometer analyzer for SO ₂ concentration detection (LA3), the outer area laser popularly for detecting the SO ₂ concentration of light However, the present invention is not limited thereto. And a laser device for generating ultraviolet region laser light may be provided in place of the laser light in the extreme ultraviolet region.

Further, in the above embodiment, the first to third laser analyzers LA1 to 3 are provided with an analyzer for PM concentration detection, but the present invention is not limited thereto. The analyzer for PM concentration detection may be omitted. In this case, the first laser analysis system LA1 is omitted, and the electric dust collector control unit 7B performs control of the electric dust collector 7 based on the numerical value of the turbidimeter 58. [

In the above embodiment, the pH adjusting unit 32 performs the pH adjusting process by inputting a pH adjusting agent. However, the present invention is not limited to this. the pH adjustment treatment may be performed by an electrolysis treatment instead of the pH adjustment agent.

In the above embodiment, the seawater circulation unit 9D performs the circulation of the circulating seawater and the seawater on the basis of the circulating seawater monitoring process of the seawater component control unit 9F, but is not limited thereto. The seawater circulation unit 9D may be configured as follows. The seawater circulation unit 9D receives the circulation stop command from the surplus determination unit 95 and the drainage of the seawater component control unit 9F and sends the seawater component adjusted by the seawater component adjustment unit 9C to the seawater scrubber 9 ) Without draining it. The seawater circulation unit 9D receives the circulation start command from the drainage and flood determination unit 95 of the seawater component control unit 9F and sends the seawater component adjusted by the seawater component adjustment unit 9C to the seawater scrubber 9).

In the above-described embodiment, the scale removing unit 34 is of an electrolytic type for removing the scale sticking to the piping by the electrolytic treatment, but is not limited thereto. In the scale removing unit 34, an electromagnetic type in which the scale in the pipe is peeled off by an electronic process may be used instead of the electrolysis type. In this case, in the seawater component control unit 9F, the scale attached to the pipe can be stripped by controlling the frequency and the voltage of the electronic scale removing unit 34. [

In the above-described embodiment, the case where the abnormal information is stored in the nonvolatile memory 73 when the abnormal information is received and the movable data for a predetermined period before and after the generated time has been described. However, It is only necessary to memorize the previous operation data.

The exhaust gas component detection unit may include first and second laser analyzing systems disposed at an inlet side and an outlet side of the electric dust collecting apparatus and a third laser analyzing system disposed at an outlet side of the seawater scrubber, Consists of.

According to the present embodiment, since the exhaust gas components on the inlet side and the outlet side of the electric dust collecting apparatus and the exhaust gas components on the inlet side and the outlet side of the seawater scrubber can be detected by the three laser analyzers, the electric dust collector and the seawater scrubber It is possible to grasp the operating state of the apparatus.

In the present embodiment, the first laser analyzer is configured to detect the PM concentration. The second laser analyzer is configured to detect the PM concentration and the SO ₂ concentration. The third laser analyzer is configured to detect the PM concentration, the SO ₂ concentration, and the CO ₂ concentration.

According to this embodiment, since the PM concentration and the SO ₂ concentration before and after the exhaust gas treatment are detected by the first to third laser analyzers, the PM dust collection rate of the electric dust collector and the SOx removal performance of the seawater scrubber can be monitored in real time have. Further, in the third laser analyzer, since the CO ₂ concentration after the exhaust gas treatment is detected, it is possible to monitor the environmental regulation value using CO ₂ .

Further, in the present embodiment, it is preferable that the first laser analyzer, the second laser analyzer and the third laser analyzer include a light source unit that emits a laser beam, a light source side optical unit that collimates the outgoing light from the light source unit, A light receiving side optical system that condenses the transmitted light propagated through a space in which the measurement object exhaust gas exists from the light source side optical system, and a light receiving side optical system that receives light condensed by the light receiving side optical system A signal processing circuit for processing the output signal of the light receiving unit, and an arithmetic processing unit for measuring the concentration of the exhaust gas components to be measured and sold in the exhaust gas based on the processed signal. Further, the first laser analyzer includes an analyzer for PM concentration detection, in which the light source unit emits a visible region laser light or a near-infrared region laser light. The second laser analyzer comprises the analyzer for PM concentration detection and an analyzer for SO ₂ concentration detection in which the light source unit emits laser light in an extreme ultraviolet region or ultraviolet region laser light. The third laser analyzer comprises the PM concentration detection analyzer, the SO ₂ concentration detection analyzer, and the CO ₂ concentration detection analyzer for emitting the near-infrared region laser light from the light source unit.

According to the present embodiment, in the first laser analyzer, the PM concentration can be detected by the visible region laser light or the near-infrared region laser light emitted from the light source portion of the PM concentration detection analyzer. In the second laser analyzer, the visible region laser light or the near-infrared region laser light emitted from the light source portion of the PM concentration detection analyzer and the infrared region laser light or the ultraviolet region laser light emitted from the light source portion of the SO ₂ concentration- The PM concentration and the SO ₂ concentration can be detected. In the third laser analyzer, the visible region laser light or the near-infrared region laser light emitted from the light source portion of the PM concentration detection analyzer, the extreme ultraviolet region laser light or the ultraviolet region laser light emitted from the light source portion of the SO ₂ concentration- , The PM concentration, the SO ₂ concentration, and the CO ₂ concentration can be detected by the near infrared region laser light emitted from the light source portion of the analyzer for CO ₂ concentration detection.

Further, in the present embodiment, the water quality measuring section is provided with a turbidimeter for measuring the concentration of the turbid component in the recovered seawater recovered from the seawater scrubber.

According to this embodiment, since the turbidity component concentration (turbidity) in the recovered seawater recovered from the seawater scrubber can be measured by the turbidimeter, the PM concentration measured by the first laser analyzer and the second laser analyzer and the measured turbidity It is possible to monitor the PM dust collection rate of the electric dust collecting apparatus.

According to the present embodiment, the exhaust gas processing control section includes an electric dust collector control section for controlling the electric dust collector, a scrubber control section for controlling the seawater injection amount of the seawater scrubber, an SO ₂ concentration and the CO ₂ concentration.

According to the present embodiment, the calculation unit of the exhaust gas processing control unit performs calculation based on the SO ₂ concentration and the CO ₂ concentration after the exhaust gas treatment, so that it is possible to perform more accurate monitoring of the environmental regulation value using CO ₂ .

In the present embodiment, the exhaust gas component detecting section is constituted by a second laser analyzing system arranged on the outlet side of the electric dust collecting apparatus and a third laser analyzing system arranged on the outlet side of the seawater scrubber, Wherein the laser analyzer is configured to detect the concentration of SO ₂ , the third laser analyzer is configured to detect the SO ₂ concentration and the CO ₂ concentration, and the water quality measurement section calculates the concentration of the contaminated component in the recovered seawater recovered from the seawater scrubber And a turbidimeter for measuring the turbidity.

According to this embodiment, since the turbidity component concentration in the recovered seawater recovered from the seawater scrubber by the turbidimeter can be measured, it is possible to monitor the PM dust collection rate of the electric dust collector based on the measured turbidity.

In the present embodiment, the seawater component adjustment unit includes an oil separation unit that separates the oil from the recovered seawater recovered from the seawater scrubber, and a pH adjustment unit that adjusts the pH of the recovered seawater.

According to the present embodiment, since the oil separator is provided in the seawater component adjuster, the oil in the recovered seawater can be removed from the seawater scrubber. The amount of seawater necessary for neutralization of SOx can be suppressed by adjusting the pH of recovered seawater into which the oil is separated to a suitable pH. Furthermore, when the recovered seawater is disposed of in the sea, it is possible to adjust the pH to the pH in the sea by the pH adjusting unit.

Further, in the present embodiment, the water quality measuring section is provided with a pH meter for measuring the pH of the seawater and an oil concentration meter for measuring the oil concentration in the seawater mixed with the oil mist in the exhaust gas.

According to the present embodiment, since the water quality in the seawater component adjustment unit is measured by the pH meter and the oil concentration meter, the operating state of the electrolytic treatment unit or the electromagnetic (electromagnetic) treatment unit can be accurately monitored in real time.

Further, in the present embodiment, the oil separation section includes an electrolysis processing section for electrolyzing the recovered seawater recovered from the seawater scrubber to separate oil fractions.

According to the present embodiment, since the electrolytic oil separator is provided in the seawater component adjuster, the oil of the recovered seawater recovered from the seawater scrubber can be removed. In particular, as in the case of removing the oil by the filter, it is not necessary to perform the cleaning or replacement operation of the filter, and the oil can be continuously separated from the recovered seawater for a long time.

Further, in the present embodiment, the pH adjusting section is configured to adjust the pH by inputting a neutralizing agent into the recovered seawater recovered from the seawater scrubber.

According to the present embodiment, in the pH adjusting section, the recovered seawater from which the oil is separated can be adjusted to a suitable pH by the pH adjusting section by the introduction of the neutralizing agent. Further, when the recovered seawater is disposed of in the sea, it is possible to adjust the pH to match the pH in the sea.

In the present embodiment, the exhaust gas processing control unit includes an electric dust collector control unit for controlling the electric dust collector and a scrubber control unit for controlling the amount of seawater jetted by the seawater scrubber, and the electric dust collector control unit and the scrubber The control unit and the seawater component control unit for controlling the seawater component of the seawater scrubber are connected to the system management unit via a network, and the system management unit detects the concentration of PM, the concentration of SO ₂ , and the concentration of CO ₂ And a data accumulating unit for accumulating the pH, turbidity and oil concentration measured by the water quality measuring unit as accumulation data.

According to the present embodiment, since the PM concentration, the SO ₂ concentration, the CO ₂ concentration, and the turbidity component concentration are accumulated in the data accumulation section as the accumulation data, the accumulation data can be analyzed so that the operation state of the electric dust collector and the seawater scrubber can be grasped have. In addition, since the pH and the oil concentration are accumulated as the accumulation data, the operation state of the oil treatment section and the pH adjustment section can be grasped by analyzing the accumulation data.

Further, in the present embodiment, the system management section includes a ship operation system for operating the ship, and a communication control section for transmitting (receiving, exchanging) information through a wireless network.

According to the present embodiment, it is possible to grasp the operating status of the marine diesel engine exhaust gas treating system for each ship operating in the marine vessel operating system for operating the vessel, and it becomes possible to perform maintenance and the like efficiently.

In the present embodiment, the exhaust gas processing control unit includes an electric dust collector control unit for controlling the electric dust collector and a scrubber control unit for controlling the amount of seawater jetted by the seawater scrubber, and the electric dust collector control unit and the scrubber The control unit and the seawater component control unit for controlling the seawater component of the seawater scrubber are connected to the system management unit via a network, and the system management unit detects the concentration of PM, the concentration of SO ₂ , and the concentration of CO ₂ And a data accumulating unit for accumulating the pH, turbidity, and oil concentration measured by the water quality measuring unit as accumulation data, wherein the electric dust collector control unit is configured to accumulate the PM Concentration, an applied current value of the electric dust collector, Wherein the control unit monitors the operation state of the electric dust collector based on the turbidity measured by the electric dust collector and transmits abnormal information to the system management unit when the abnormality of the electric dust collector is detected, The operating state of the seawater scrubber is monitored based on the SO ₂ concentration detected by the gas component detector and the piping flow rate value of the seawater scrubber, and when abnormality of the seawater scrubber is detected, the abnormality information is transmitted to the system manager And the seawater component control unit controls the operation of the electrolysis processing unit and the pH adjusting unit based on the pH and oil concentration measured by the water quality measuring unit and the command value of the pH adjuster of the electrolysis processing unit and the pH adjusting unit input instruction value When the abnormality of the electrolytic processing unit or the pH adjusting unit is detected, Transmitting information to the management system, and the system management unit is provided with parts of the alarm generator which generates an alarm when receiving at least one of which at least the information.

According to the present embodiment, an alarm is generated when an abnormality is detected in the electric dust collector, the seawater scrubber, the electrolytic processing portion, or the pH adjusting portion by monitoring the operation state of the electric dust collector, the seawater scrubber, the electrolytic processing portion, The electric dust collector, the seawater scrubber, the electrolytic treatment section and the pH adjusting section can be notified immediately.

In addition, in the present embodiment, the system management section includes an alarm information transmission section that transmits alarm information to the portable information terminal registered in advance when generating the alarm in the alarm generation section.

According to the present embodiment, when the alarm generating section generates an alarm, it is possible to transmit alarm information from the system management section to a portable device such as a portable telephone, and it is not necessary to constantly monitor the operation status of the marine diesel engine exhaust gas processing system .

In addition, in the present embodiment, the system management section, when receiving the abnormality information, detects the abnormality information, the abnormality occurrence time, and the accumulation time preceding the abnormality occurrence time accumulated in the data accumulation section And a nonvolatile memory unit for storing data.

According to the present embodiment, since the accumulation data at the alarm occurrence time and a certain time before the alarm occurrence time accumulated in the data accumulation section can be stored in the non-volatile storage section, It is possible to accurately perform an abnormal analysis of the electric dust collecting apparatus, the seawater scrubber, the electrolysis processing unit, or the pH adjusting unit.

The present embodiment is characterized in that the exhaust gas processing control section is configured to control the exhaust gas processing section based on the PM concentration and the SO ₂ concentration detected by the exhaust gas component detecting section, the applied current value of the electric dust collector, the turbidity measured by the water quality measuring section, A first maintenance time determination unit configured to monitor an operation state of the electric dust collector and the seawater scrubber based on the flow rate of the seawater scrubber and to determine a repair time of the electric dust collector and the seawater scrubber based on a monitoring result, Wherein the seawater component control unit monitors the operation state of the electrolysis processing unit and the pH adjusting unit based on the pH and oil concentration measured by the water quality measuring unit and the applied current value of the electrolysis processing unit, And a second maintenance time determination unit for determining maintenance intervals of the treatment unit and the pH adjustment unit.

According to this embodiment, the maintenance period of the electric dust collecting apparatus, the seawater scrubber, the electrolytic processing section or the pH adjusting section can be accurately determined by monitoring the operation statuses of the electric dust collecting apparatus, the seawater scrubber, the electrolytic processing section or the pH adjusting section, The apparatus, the seawater scrubber, the electrolytic treatment section, or the pH adjustment section can be carried out deliberately.

Further, in the present embodiment, the oil separation section includes a centrifugal separation section for separating the recovered seawater recovered from the seawater scrubber by centrifugal separation.

According to the present embodiment, since the centrifugal separator is provided in the seawater component adjustment section, it is possible to remove the oil from the recovered seawater recovered from the seawater scrubber. In particular, as in the case of removing the oil by the filter, it is not necessary to perform the cleaning or replacement operation of the filter, and the oil can be continuously separated from the recovered seawater for a long time.

Further, in the present embodiment, the oil separation section includes an electromagnetic processing section for electronically processing the recovered seawater recovered from the seawater scrubber to separate oil fractions.

According to the present embodiment, since the seawater component adjustment section is provided with the electronic treatment type oil separation section, it is possible to remove the oil of the recovered seawater recovered from the seawater scrubber. In particular, as in the case of removing the oil by the filter, it is not necessary to perform the cleaning or replacement operation of the filter, and the oil can be continuously separated from the recovered seawater for a long time.

Further, in the present embodiment, the oil separator includes a filter for separating the oil from the recovered seawater recovered from the seawater scrubber.

According to the present embodiment, since the filter-type oil separator is provided in the seawater component adjuster, the oil of the recovered seawater recovered from the seawater scrubber can be removed with a simple structure.

In the present embodiment, the pH adjusting section is configured to adjust the pH by electrolyzing the recovered seawater recovered from the seawater scrubber.

According to the present embodiment, in the pH adjusting section, the recovered seawater recovered from the seawater scrubber is electrolyzed, whereby the recovered seawater in which the oil is separated can be adjusted to a pH suitable for the pH adjusting section. Furthermore, when the recovered seawater is disposed of in the sea, it is possible to adjust the pH to match the pH in the sea.

In the present embodiment, the seawater component control unit monitors the components of the circulating seawater to be recovered and circulated from the seawater scrubber on the basis of the pH, turbidity, and oil concentration measured by the water quality measuring unit, The control unit sends a multiple of the circulating seawater and a command to flood the seawater to the seawater circulation unit, and upon receipt of the command, the circulating seawater is drained, then the required amount of seawater is pumped up And is circulated to the seawater scrubber.

According to this embodiment, the pH, turbidity and oil concentration contained in the circulating seawater recovered and circulated from the seawater scrubber are monitored, and by multiplying the circulating seawater and fresh seawater, the pH, turbidity Or the oil concentration exceed the drainage regulation value and can not be drained into the outside sea.

Further, in the present embodiment, the seawater circulation unit drains the seawater whose composition has been adjusted by the seawater component adjustment unit when the circulation stop command is received from the seawater component control unit, without returning the seawater to the seawater scrubber, And when the circulation start command is received, the seawater component adjusted by the seawater component adjustment unit is circulated and supplied to the seawater scrubber.

According to the present embodiment, when the sea water component-adjusted by the sea water component adjustment unit is drained into the outside sea by the circulation stop command or the circulation start instruction from the seawater component control unit, You can choose the case. As a result, it is possible to drain the seawater into the outside sea, and to circulate and supply the seawater in the seawater where the drainage is strictly regulated.

Further, in the present embodiment, the seawater circulation unit is used when the ballast water is not loaded in the ballast tank and is used as circulated seawater by pumping up a necessary amount of seawater, and when the ballast water is loaded in the ballast tank, And the ballast water in the ballast tank is circulated and supplied to the seawater scrubber.

According to this embodiment, since the ballast water in the ballast tank is supplied to the seawater scrubber, there is no need to flood the seawater for the seawater scrubber. In addition, seawater for use in a seawater scrubber can be supplied by using a seawater flotation pump for ballast tanks.

In addition, the present embodiment is characterized by comprising a pipe for connecting between the seawater scrubber, the seawater component control unit, the water quality measuring unit and the seawater circulation unit, and a scale installed on the outer surface of the pipe, And a scale removing section which is removed by decomposition or electronic processing.

According to the present embodiment, by the scale removing unit, scales of marine organisms, microorganisms, calcium and magnesium sticking to the inside of the pipe can be removed.

(Industrial availability)

The present invention relates to a marine diesel engine exhaust gas treatment capable of reliably removing PM and SOx by removing particulate matter from an exhaust gas discharged from a marine diesel engine by an electrostatic precipitator and removing sulfur oxides by a seawater scrubber System can be provided.

1: Ships
2: Screw propeller
3: Marine diesel engine
4: Piping
5: SCR denitration unit
6: Element tank
7: Electrostatic precipitator
7A: main body of the electric dust collector
7B: electric dust collector control unit
7C: Cyclone dust collector
7a:
7b: Operation status monitoring section
7c: first repair timing determining section
LA1: First laser analyzer
LA2: Second laser analyzer
LA3: Third laser analyzer
8: Economizer
9: Seawater scrubber
9A: Cylindrical container
9B: injection nozzle
9C:
9D: Seawater circulation part
9E: Scrubber control unit
9F: Seawater component control unit
11: outer case
12a, 12b: veneer
13: Case
14: partition plate
15a to 15d:
16:
17: Swirl flow forming part
18: discharge electrode
18a: needle-shaped electrode
19: Electrode Support
20: cylindrical electrode
20a: Through hole
21: Casing electrode
22: Collection space
23: Electrode Support
31: electrolysis processing section
32: pH adjuster
41: Tank for scrubber
42: Ballast tank
43, 44: electromagnetic opening / closing valve
45: circulation pump
46: Filter
47: Pumps for ballast tanks
48 to 51, 53: electromagnetic opening / closing valve
54: Flowmeter
EGC: Exhaust gas processing control section
61:
62: opening / closing valve control section
63: Operation status monitoring section
64: First repair timing determining section
71:
72:
73: Nonvolatile memory
74:
75: Alarm sound generator
76:
77: Portable information terminal
80:
91: electrolysis processing control unit
92: pH controller
93: Operation status monitoring section
94: Second repair time determining unit
95: Multiplier and scoop determining unit
104:
105: Collimate lens
106: condenser lens
107:
108: Signal processing circuit
109:

Claims (19)

A marine diesel engine exhaust gas treatment system for treating exhaust gas resulting from combustion of a marine diesel engine mounted on a ship,
A seawater scrubber for spraying seawater into the exhaust gas,
An exhaust gas component detector for detecting an exhaust gas component after the treatment by the seawater scrubber,
A seawater component adjustment unit for recovering the seawater sprayed by the seawater scrubber to perform component adjustment;
A water quality measurement unit monitoring (monitoring) the quality of the recovered seawater whose components are adjusted by the seawater component adjustment unit,
An exhaust gas processing control section for adjusting the operating state of the seawater scrubber so that the concentration of the component after exhaust gas treatment detected by the exhaust gas component detecting section becomes within a specified range;
And a seawater component control unit for adjusting the operating state of the seawater component adjustment unit such that the seawater component detected by the water quality measurement unit is within a predetermined range,
The seawater scrubber sprayed the recovered seawater whose composition was adjusted by the seawater component adjuster to the exhaust gas,
The exhaust gas component detecting unit detects the first SO ₂ concentration and the CO ₂ concentration included in the exhaust gas after the treatment by the seawater scrubber,
The exhaust gas treatment control section performs an operation (division) by dividing the first SO ₂ concentration by the CO ₂ concentration from the detected values, generates an SO ₂ concentration target value based on the calculation result, And a scrubber control unit for calculating a first command value for matching the first SO ₂ concentration detected by the first command value to the SO ₂ concentration target value and for controlling the operating state of the seawater scrubber based on the first command value Marine diesel engine exhaust gas treatment system. The method according to claim 1,
The exhaust gas component detecting unit further detects a second SO ₂ concentration included in the exhaust gas before the treatment by the seawater scrubber,
Wherein the scrubber control unit calculates a second command value from the detected value of the second SO ₂ concentration contained in the exhaust gas before the processing by the seawater scrubber and then adds the first command value to the second command value, And the operating state of the seawater scrubber is controlled based on the added value. 3. The method of claim 2,
Wherein the scrubber control unit is operable to detect the second SO ₂ concentration detected value included in the exhaust gas before the treatment by the seawater scrubber and the detected value of the first SO ₂ concentration included in the exhaust gas after the treatment by the seawater scrubber basis by, sO _X removal rate and the output, marine diesel engine exhaust gas treatment system characterized in that for controlling the operational state of the water scrubber, the sO _X removal efficiency is such that the predetermined range. 4. The method according to any one of claims 1 to 3,
Further comprising a drain route for draining the recovered seawater whose composition has been adjusted by the seawater component adjuster,
Wherein the seawater component control unit selects and executes either of the recovered seawater sprayed into the exhaust gas by the seawater scrubber or drained from the drainage route. 5. The method of claim 4,
The seawater component adjustment section drains the recovered seawater from the drain route and raises a required amount of seawater before the value measured by the water quality measurement section exceeds the drainage regulation value predetermined by the environmental regulation Marine diesel engine exhaust gas treatment system. The method according to claim 1,
Wherein the water quality measuring unit has a turbidimeter for measuring the turbid component concentration of the recovered seawater. A marine diesel engine exhaust gas treatment system for treating exhaust gas resulting from combustion of a marine diesel engine mounted on a ship,
An electric dust collector for collecting particulate matter in the exhaust gas discharged from the marine diesel engine;
A seawater scrubber for spraying seawater on the exhaust gas from which particulate matter has been removed by the electric dust collector;
An exhaust gas component detector for detecting an exhaust gas component after the treatment by the seawater scrubber,
A seawater component adjustment unit for recovering the seawater sprayed by the seawater scrubber to perform component adjustment;
A water quality measurement unit having a turbidity meter for measuring the concentration of the turbid component in the recovered seawater whose composition has been adjusted by the seawater component adjustment unit;
An exhaust gas processing control section for adjusting the operation state of the electric dust collector and the seawater scrubber so that the concentration of the turbid component after the treatment of the exhaust gas measured by the turbidimeter becomes within a specified range;
And a seawater component control unit for adjusting the operating state of the seawater component adjustment unit such that the seawater component detected by the water quality measurement unit is within a predetermined range,
Wherein the seawater scrubber is configured to spray the recovered seawater whose composition has been adjusted by the seawater component adjuster to the exhaust gas. 8. The method of claim 7,
And a system management unit,
The exhaust gas processing control section monitors the operation state of the electric dust collector based on the value detected by the exhaust gas component detection section, the applied current value of the electric dust collector, and the contamination component concentration measured by the turbidimeter And transmits first abnormality information to the system management unit when an abnormality of the electric dust collector is detected,
Wherein the system management unit comprises an alarm generating unit for generating an alarm when the first abnormality information is received. 9. The method of claim 8,
The exhaust gas treatment control section monitors the operating state of the seawater scrubber based on the value detected by the exhaust gas component detecting section and the flow rate of the seawater scrubber, and when the abnormality of the seawater scrubber is detected, 2 or more information to the system management unit, and the alarm generating unit generates an alarm when the second abnormality information is received. 8. The method of claim 7,
Wherein the exhaust gas processing control section controls the exhaust gas processing section based on the value detected by the exhaust gas component detection section, the applied current value of the electric dust collector, the turbidity component concentration measured by the turbidimeter, and the pipe flow rate value of the seawater scrubber, And a first maintenance time determiner for determining maintenance intervals of the electric dust collector and the seawater scrubber. 11. The method of claim 10,
The seawater component adjuster has a pH adjuster for adjusting the pH by injecting a neutralizing agent into the recovered seawater recovered from the seawater scrubber,
Wherein the seawater component control unit includes a second maintenance time determination unit for determining a maintenance time of the pH adjustment unit based on the value measured by the water quality measurement unit. 8. The method of claim 7,
Wherein the electric dust collecting device burns the collected particulate matter. 8. The method of claim 7,
Wherein the exhaust gas component detecting unit includes a first laser analyzer disposed on an inlet side of the electric dust collector and a second laser analyzer disposed on an outlet side of the electric dust collector,
Wherein the exhaust gas processing control section calculates a dust collection rate of the electric dust collector based on a value detected by the first laser analyzer and the second laser analyzer, and when the dust collection rate does not fall below a preset dust collection threshold value So as to output a current command value to the electric dust collector. A marine diesel engine exhaust gas treatment system for treating exhaust gas resulting from combustion of a marine diesel engine mounted on a ship,
An electric dust collector for collecting the particulate matter in the exhaust gas discharged from the marine diesel engine;
A seawater scrubber for spraying seawater on the exhaust gas from which particulate matter has been removed by the electric dust collector;
An exhaust gas component detector for detecting an exhaust gas component after the treatment by the seawater scrubber,
A seawater component adjustment unit for recovering the seawater sprayed by the seawater scrubber to perform component adjustment;
A water quality measuring unit for monitoring the quality of the recovered seawater whose components are adjusted by the seawater component adjuster,
An exhaust gas processing control section for adjusting the operating state of the electric dust collector and the seawater scrubber so that the concentration of the component after exhaust gas treatment detected by the exhaust gas component detecting section becomes within a specified range;
And a seawater component control unit for adjusting the operating state of the seawater component adjustment unit such that the seawater component detected by the water quality measurement unit is within a predetermined range,
Wherein the exhaust gas component detecting unit includes a first laser analyzing system arranged at an inlet side of the electric dust collector and a second laser analyzer arranged at an outlet side of the electric dust collector,
Wherein the exhaust gas processing control section calculates a dust collection rate of the electric dust collector based on a value detected by the first laser analyzer and the second laser analyzer, and when the dust collection rate does not fall below a preset dust collection threshold value Wherein the electric dust collecting device collects the particulate matter collected by the electric dust collector when the current command value reaches a predetermined threshold value, and outputs a current command value to the electric dust collector, Engine exhaust gas treatment system. 15. The method of claim 14,
Wherein said exhaust gas processing control section determines that maintenance of said electric dust collecting apparatus is necessary when recovery of said dust collection rate is not observed for a predetermined time immediately after said recovery processing is completed, Processing system. 16. The method according to claim 14 or 15,
Further comprising a compressor for reducing the particulate matter recovered from the electrostatic precipitator. &Lt; Desc / Clms Page number 20 &gt; The method according to claim 13 or 14,
Wherein the exhaust gas component detection unit has a third laser analysis system disposed at an outlet side of the seawater scrubber,
Wherein a value detected by each of the first laser analyzer, the second laser analyzer and the third laser analyzer is decremented in order of the first laser analyzer, the second laser analyzer and the third laser analyzer And determining an abnormality of the first laser analyzing system, the second laser analyzing system, and the third laser analyzing system by determining whether the first laser analyzing system, the second laser analyzing system, and the third laser analyzing system are abnormal. The method according to any one of claims 1 to 3 and 6 to 15,
Further comprising a ballast tank,
Wherein the seawater component control unit uses the seawater as a circulating seawater by raising a required amount of seawater when the seawater is not loaded in the ballast tank and when the seawater is loaded in the ballast tank, Wherein the exhaust gas treating system is used as a diesel engine exhaust gas treating system for marine diesel engines. 16. The method according to any one of claims 7 to 15,
Further comprising an economizer for recovering exhaust heat by heat-exchanging the exhaust gas collected by the electric dust collector with the particulate matter.

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