JP2017136554A - Measuring-recording device for scrubber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately measure a harmful component of treatment water discharged from a scrubber.SOLUTION: A measuring-recording device for a scrubber measures and records a component of treatment water of the scrubber for purifying-cleaning exhaust gas discharged from a ship. A chamber is connected to the treatment water discharge side of the scrubber. A vacuum device is connected to the chamber. Various detectors are arranged in the chamber for analyzing the component of the treatment water in the chamber. An analytical result of the treatment water is recorded by a recorder. The treatment water discharged from the scrubber is stored in the chamber, and air suction force is made to act on the chamber by the vacuum device, and the treatment water is analyzed after extinguishing a bubble of the treatment water by deaerating the chamber inside by the suction force.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a scrubber measurement and recording device used in an exhaust gas treatment system such as an exhaust gas treatment device (EGCS) or an exhaust gas recirculation device (EGR) that purifies exhaust gas by spraying seawater on the exhaust gas of a ship or the like. About.

Engines using fossil fuels are used in ships. In the scrubber (exhaust gas treatment device), the exhaust gas discharged from the ship is brought into contact with seawater to purify the exhaust gas, and the waste water is discharged out of the ship. At this time, the SO2 concentration of exhaust gas is measured (for example, refer to Patent Document 1).
Further, EGR (exhaust gas recirculation system) is known that reduces NOx (nitrogen oxide) emission by lowering the combustion temperature by circulating the exhaust gas to lower the oxygen concentration (see, for example, Patent Document 2). ).

Japanese Patent Laying-Open No. 2015-188835 WO2014 / 109339 International Publication

Treated water such as seawater that absorbs SO2 and removes harmful components such as SO2 from the exhaust gas, or treated water used for EGR to reduce NOx from the exhaust gas of the ship is used in a ship. Discharged from the device. There are various regulatory values for the components contained in the treated water when the purified treated water is discharged out of the ship. Therefore, it is determined whether or not the treated water discharged is within the regulation value. In this case, since detectors other than ph analysis detect light transmission and fluorescence, there is a problem that bubbles contained in the treated water affect detection, and errors in measurement values tend to occur.
The present invention aims to solve the above problems.

  In order to achieve the above object, the present invention provides a scrubber measurement / recording apparatus for measuring and recording components of scrubber treated water used in an exhaust gas treatment system, and a chamber connected to a scrubber treated water discharge side. A vacuum device connected to the chamber, various detectors for analyzing the components of the treated water in the chamber disposed in the chamber, and a recording device for recording the analysis results of the treated water, from the scrubber The discharged treated water is stored in the chamber, a suction force is applied to the chamber by the vacuum device, the inside of the chamber is degassed by the suction force, and the treated water bubbles in the chamber are extinguished. It is characterized by the fact that the analysis is performed.

  In the present invention, since the treatment water discharged from the scrubber is measured after the bubbles of the treatment water are removed, the components of the treatment water can be accurately measured.

1 is an overall block explanatory diagram of a scrubber measurement recording apparatus according to the present invention. It is block explanatory drawing which shows embodiment which used this apparatus for exhaust-gas recirculation EGR.

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows the overall configuration of a SOx scrubber measurement recording apparatus 3 that analyzes the treated water discharged from the scrubber 2 and records the analysis results.
An SOx scrubber measurement and recording device 3 for reducing SOx (sulfur oxide) in ship exhaust gas is used in an EGCS (exhaust gas cleaning system Exhaust Gas Cleaning System). The EGCS purifies the exhaust gas of the ship with the scrubber 2, analyzes the exhaust gas and the treated water discharged from the scrubber 2, and records the analysis results.

  In order to purify the exhaust gas, the exhaust gas is supplied into the tank of the scrubber 2, and seawater or fresh water is sprayed from the spray unit 4 to the exhaust gas to purify SOx from the exhaust gas. The SOx scrubber measurement recording device 3 measures and records the exhaust gas purified by the scrubber 2 and the purified treated water.

  The SOx scrubber measurement and recording device detects SO2 and CO2 in the exhaust gas of the ship, and determines the ph (hydrogen ion concentration), turbidity, and PAH (polycyclic aromatic hydrocarbon) of the treated water produced by the scrubber 2. Detect and record. The turbidity detectors 6 and 8 used in this apparatus detect the light transmittance of the treated water, and the PHA detector 10 irradiates the treated water with ultraviolet rays, and the fluorescence from PAH contained in the treated water. Is detected.

The spray unit 4 of the scrubber 2 is connected to a fresh water generating device 48 via a pump 44 and a valve 46, and is connected to a seawater input device 42 via a valve 38 and a pump 40. The scrubber 2 sprays seawater or fresh water from the spray unit 4, absorbs SO2 from the exhaust gas into the seawater or fresh water, removes SO2 from the exhaust gas, and discharges it from the scrubber 2 as treated water.

The scrubber 2 is connected to an exhaust gas supply path 52 connected to an exhaust gas input line 50 made of a pipe and an exhaust gas discharge path 54. The drain separator 56 is connected to the exhaust gas supply path 52 through terminations 58 and 60, and the drain separator 62 is connected to the discharge path 54 through terminations 64 and 66. The drain separators 56 and 62 are connected to the exhaust gas analyzer 32 through valves 68 and 70, a pump 72, a dry cooler 28, a flow meter 30, and a valve 76.

In the one-pass absorption seawater operation, seawater is taken into the scrubber 2 from the outside of the ship, the exhaust gas in the scrubber 2 is scrubbed, and the purification treatment liquid is discharged out of the ship. The treatment liquid discharged out of the ship has various regulation values, and it is determined whether the discharged treated water is within the regulation value. The detectors other than the ph analysis (turbidity detectors 6 and 8 and PAH detector 10) detect light transmission and fluorescence, and bubbles contained in the treated water affect the detection.

Therefore, the SOx scrubber measurement recording apparatus stores the treated water in the tank of the chamber 12 before analyzing the treated water, and applies the suction force of the vacuum device 14 to the tank of the chamber 12. This apparatus is characterized in that the treatment water is deaerated and settled by this intake action, the bubbles of the treatment water are erased, the treatment water is analyzed, and the analysis result is stabilized.

The discharge part of the scrubber 2 is connected to the chamber 12 via a valve 16 and a pump 18. The scrubber 2 is connected to an exhaust gas analyzer 32 via a drain separator 20, valves 22, 24, 26, a dry cooler 28, and a flow meter 30.
The chamber 12 is provided with a turbidity detector 6, a ph (hydrogen ion concentration) detector 34, and a PAH (polycyclic aromatic hydrocarbon) detector 10. The chamber 36 is provided with a turbidity detector 8, and the chamber 36 is connected to a seawater input device 42 via a valve 38 and a pump 40.

  The vacuum device 14 is connected to the tanks of the chambers 12 and 36 and applies a suction force to the tanks of the chambers 12 and 36 to deaerate and stabilize the treated water in the tanks of the chambers 12 and 36 by an intake action. It is configured as follows. The air pressure in the chambers of the chambers 12 and 36 can be set to an appropriate value between vacuum and a predetermined low pressure. The exhaust gas analyzer 32 is connected to the flow meter 30, the pump 72, the dry cooler 28, the drain separators 56, 62, and the like through pipes so that the exhaust gas is supplied to the exhaust gas analyzer 32 through these devices. It is configured.

The turbidity detectors 6 and 8, the ph detector 34, the PAH detector 10, and the exhaust gas analyzer 32 are electrically connected to a programmable logic controller 80, which is connected to the main control panel. 82 and the data recording device 84 are electrically connected.

  In the above-described configuration, seawater or fresh water is sprayed on the exhaust gas supplied to the scrubber 2 under the control of the control unit of the system, SO2 (sulfur dioxide) is absorbed from the exhaust gas into the seawater or fresh water, and SO2 (sulfur dioxide) from the exhaust gas. ) Is removed. Seawater is taken from the outside of the ship, supplied to the scrubber 2, and discharged from the scrubber 2 to the outside of the ship through the outboard discharge line. When discharging treated water out of the ship, there are various regulatory values. The determination unit of the system determines whether the discharged treated water is within the regulation value based on the detection values of the turbidity detector 6, the ph detector 34, and the PAH detector 10.

Since the detectors 6 and 10 other than the ph detector 34 detect light transmission and fluorescence, bubbles contained in the treated water affect the detection. For this purpose, the apparatus stores water in the chambers 12 and 36 before analyzing the treated water and drives the vacuum device 14 to apply a vacuum force or a predetermined suction force in the chambers 12 and 36. As a result, the treated water in the chamber 12 is degassed and settled to remove bubbles contained in the treated water. The treated water stored in the chambers 12, 36 is based on the detection values of the detectors 6, 8, 34, 10 disposed in the chambers 12, 36 after the deaeration / static treatment by the suction force of the vacuum device 14. Analysis is performed.

Thereby, the analysis result of treated water is stabilized. The purified treated water generated by the scrubber 2 is branched from the outboard discharge line 86 and taken into the chambers 12 and 36 by the pump 18, and the measurement recording device ph, turbidity, PAH detectors 34, 6, 8, 10 Measure with The water from the seawater input device 42 and the fresh water generating device 48 is used as the input liquid before the purification treatment, and the water after passing through the scrubber 2 is measured as the output liquid. Further, the ph and temperature of the final drainage are measured by the ph detector 88 and the temperature detector 108.

  The measurement recording device receives position information of the measurement location and time information being measured from other devices. The exhaust gas analyzer 32 analyzes the exhaust gas supplied from the gas drain separators 56 and 62. The data of the exhaust gas analyzer 32 and the detectors 6, 8, 34, 10, 88, and 108, which are purification treatment liquids, are recorded with a special protocol together with the position and time signal under the control of the programmable logic controller 80. It is recorded on the recording medium of the device 84.

The record records data for 18 months, and the data is constantly updated. This data reading is processed by the main control panel 82, but the acquired data cannot be changed. The main control panel 82 can display and print analysis data, log data, and calibration data.
In the figure, reference numeral 110 is a filter regulator, 112 is a GPS time signal, 116, 118, 120 and 122 are valves, and 124 is a pump.

  FIG. 2 shows a system diagram of the EGR system. The configuration of the scrubber measurement (monitoring) recording device 3 ′ of the system is the same as that of the measurement recording device 3 shown in FIG. 1 and includes a chamber connected to the treated water discharge side of the EGR scrubber 94. The internal combustion engine includes a diesel engine 90 that is a main engine for marine propulsion, a supercharger 92 that is driven by exhaust gas from the engine 90, and a part of the exhaust gas that is guided from the supercharger 92 to the engine 90. An EGR scrubber 94 that recirculates and performs EGR, an EGR blower 96, and an EGR system 100 that includes an air cooler 98 are provided.

The exhaust port of the cylinder part of each cylinder of the engine 90 is connected to an exhaust static pressure pipe as an exhaust gas collecting pipe. The exhaust static pressure pipe is connected to the inlet side of the supercharger 92. A scavenging trunk of each cylinder portion of the engine 90 is connected to a supercharger 92 via an air cooler 98. The turbine of the supercharger 92 is driven by the exhaust gas from the engine 90, and the turbine work obtained by the turbine is transmitted to the compressor via the rotating shaft.

The compressor sucks outside air (air) or a mixture of outside air and recirculation gas and raises the pressure to a predetermined scavenging pressure. The exhaust gas after giving the turbine work in the turbine flows out into the exhaust path L1. A valve 102 for performing EGR is provided in the exhaust path L1. The opening degree of the valve 102 is adjusted by a control unit (not shown), and is fully opened when the engine 90 is performing EGR, and is fully closed when EGR is not performed. An EGR scrubber 94 is connected to the valve 102.

The EGR scrubber 94 sprays a liquid such as water to the exhaust gas flowing through the EGR path L2 by controlling the water treatment system 104, so that not only impurities such as PM contained in the exhaust gas but also SOx is contained. Remove. In order to remove bubbles generated when the scrubber 94 purifies the exhaust gas, the treated water discharged from the EGR scrubber 94 is stored in the chamber of the monitoring recording device 3 ′ under the control of the water treatment system 104.

Since the treated water in the chamber is mixed with air, it cannot be measured with a turbidimeter or PAH meter as it is. Therefore, the monitoring recording device 3 'stores the treated water in the chamber tank before analyzing the treated water, and applies the suction force (vacuum force) of the vacuum device 14' to the chamber tank. By this intake action, the treated water is degassed and settled, the bubbles of the treated water are eliminated, and the treated water is analyzed. The chamber is provided with a turbidity detector 6 ′, a ph detector 34 ′, a PAH detector 10 ′, and a thermometer 108. After the measurement, the treated water in the chamber is returned to the EGR scrubber 94 under the control of the water treatment system 104 or discharged outside the ship through the valve 106.

2 Scrubber 4 Spray unit 6 Turbidity detector 8 Turbidity detector 10 PHA detector 12 Chamber 14 Vacuum device 16 Valve 18 Pump 19 Pump 20 Drain separator 22 Valve 24 Valve 26 Valve 28 Dry cooler 30 Flow meter 32 Exhaust gas analyzer 34 ph detector 36 chamber 38 valve 40 pump 42 seawater input device 44 pump 46 valve 48 fresh water generating device 50 exhaust gas input line 52 exhaust gas supply passage 54 exhaust gas discharge passage 56 drain separator 58 termination 60 termination 62 drain separator 64 termination 66 Termination 68 Valve 70 Valve 72 Pump 74 Dry cooler 76 Valve 80 Programmable logic controller 82 Main control panel 84 Data recording device 86 Outboard Discharge line 88 ph detector 90 Engine 92 Supercharger 94 EGR scrubber 96 EGR blower 98 Air cooler 100 EGR system 102 Valve 104 Water treatment system 106 Valve 108 Thermometer 110 Filter regulator 112 GPS time signal 116 Valve 118 Valve 120 Valve 122 Valve

Claims (1)

A scrubber measurement and recording device for measuring and recording the components of treated water of a scrubber used in an exhaust gas treatment system, a chamber connected to the treated water discharge side of the scrubber, a vacuum device connected to the chamber, Various detectors for analyzing the components of the treated water in the chamber disposed in the chamber, and a recording device for recording the analysis results of the treated water, storing the treated water discharged from the scrubber in the chamber. The vacuum is applied to the chamber by the vacuum device, the inside of the chamber is deaerated by the suction, and the treated water is analyzed after the bubbles of the treated water in the chamber are extinguished. Measuring and recording device for scrubbers.

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