CN107875810B - Test system and method for washing tower of inert gas system - Google Patents
Test system and method for washing tower of inert gas system Download PDFInfo
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- CN107875810B CN107875810B CN201711002400.6A CN201711002400A CN107875810B CN 107875810 B CN107875810 B CN 107875810B CN 201711002400 A CN201711002400 A CN 201711002400A CN 107875810 B CN107875810 B CN 107875810B
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Abstract
The invention discloses a test system and a test method for an inert gas system washing tower, and belongs to the technical field of marine machinery. The test system comprises a seawater supply device, a flue gas supply device, a fan, a water seal device and a measuring device; the seawater supply device comprises a water pump and a water tank filled with simulated seawater, and the water pump is respectively communicated with the simulated seawater and the washing tower; the flue gas supply device comprises a natural gas boiler and a sulfur dioxide gas cylinder, the natural gas boiler and the sulfur dioxide gas cylinder are communicated with a fan through a washing tower, the fan, a water seal device and the atmosphere are sequentially communicated, and the water seal device is respectively communicated with a water pump and simulated seawater; the measuring device comprises a flue gas analyzer, a first switch valve, a second switch valve and a third switch valve, wherein the flue gas analyzer is communicated with the air inlet of the washing tower, the air outlet of the washing tower and the air outlet of the water sealing device sequentially through the first switch valve, the second switch valve and the third switch valve. The invention reduces the test cost.
Description
Technical Field
The invention relates to the technical field of marine machinery, in particular to a test system and a test method for an inert gas system washing tower.
Background
The Inert Gas System (IGS) can be applied to a crude oil tanker provided with an auxiliary boiler, and has the main functions of desulfurizing, dedusting and pressurizing flue Gas generated by the auxiliary boiler of a ship by using seawater to obtain Inert Gas with very stable chemical properties, pumping out the Inert Gas from the crude oil to replace goods and filling the goods into an oil tank of the oil tanker, so that the oxygen content of the oil tank is reduced to be below the lower explosion limit, thereby avoiding the explosion of the oil tank and realizing the protection of the crude oil tanker under various working conditions such as navigation, oil loading, oil drainage, tank sweeping, tank washing and the like.
The inert gas system comprises a washing tower, a fan, a water seal device and the like. The washing tower is used for cooling, desulfurizing, dedusting and dehumidifying flue gas, is the most important equipment in the inert gas system, and has a determining function on the function realization of the whole inert gas system. Therefore, before using the inert gas system, the scrubber needs to be tested to ensure that the required inert gas can be provided to avoid explosion of the crude oil carrier.
Offshore testing of wash towers is currently performed on crude oil vessels moored at ports. During the test, the ship auxiliary boiler is started to generate flue gas, the flue gas is treated by the washing tower, the content of each component in the flue gas before and after treatment is detected, and whether the flue gas treatment capacity of the washing tower meets the performance requirement is determined according to the content change conditions of each component before and after the flue gas treatment.
In the process of implementing the invention, the inventor finds that the prior art has at least the following problems:
after the ship auxiliary boiler is started, the ship auxiliary boiler needs to be operated under a certain load, and high-temperature steam (energy) generated by the ship auxiliary boiler is consumed, for example, a cargo oil pump is used for driving liquid flow in a cabin to consume the high-temperature steam generated by the ship auxiliary boiler. If the liquid in the cabin adopts crude oil, because how the processing capacity of the washing tower is unclear at this moment, if the processing capacity of the washing tower is not good, the liquid obtained after the washing tower is processed is not inert gas, and the non-inert gas is filled in the cabin to possibly cause the combustion and even the explosion of the crude oil, so that the risk of explosion exists when the cargo oil pump is adopted to drive the crude oil to flow and consume the load, and certain danger exists; if the liquid in the cabin is changed into the seawater of the port, the seawater in the port has more impurities and poor cleanliness, and the impurities in the seawater can cause the seawater to flow in the cargo oil pump to collide with the inner wall of the cargo oil pump when the cargo oil pump is adopted to drive the seawater to flow and consume the load, so that the cargo oil pump is damaged; if the liquid in the cabin is changed into clean fresh water, the cost of the whole test is very high because the crude oil tanker is parked at the port, the fresh water resource is deficient, the acquisition cost is high, and the hydraulic pressure in the cabin is very large.
Disclosure of Invention
In order to solve the problem of high test cost in the prior art, the embodiment of the invention provides a test system and a test method for an inert gas system washing tower. The technical scheme is as follows:
on one hand, the embodiment of the invention provides a test system of an inert gas system washing tower, which comprises a seawater supply device, a flue gas supply device, a fan, a water seal device and a measuring device, wherein the seawater supply device is connected with the flue gas supply device;
the seawater supply device comprises a water pump and a water pool containing simulated seawater, the simulated seawater is formed by dissolving sea salt in fresh water, a water inlet of the water pump and a water outlet of the washing tower are respectively communicated with the simulated seawater through pipelines, and a water outlet of the water pump is communicated with a water inlet of the washing tower through a pipeline;
the flue gas supply device comprises a natural gas boiler and a sulfur dioxide gas cylinder, the natural gas boiler and the sulfur dioxide gas cylinder are respectively communicated with a gas inlet of the washing tower through pipelines, a gas outlet of the washing tower is communicated with a gas inlet of the fan through a pipeline, a gas outlet of the fan is communicated with a gas inlet of the water seal device through a pipeline, a gas outlet of the water seal device is communicated with the atmosphere through a pipeline, a water inlet of the water seal device is communicated with a water outlet of the water pump through a pipeline, and a water outlet of the water seal device is communicated with the simulated seawater through a pipeline;
the measuring device comprises a flue gas analyzer, a first switch valve, a second switch valve and a third switch valve, wherein the flue gas analyzer is communicated with the air inlet of the washing tower, the air outlet of the washing tower and the air outlet of the water sealing device through pipelines respectively, the first switch valve is arranged on the pipeline communicated with the air inlet of the washing tower, the second switch valve is arranged on the pipeline communicated with the air outlet of the washing tower, and the third switch valve is arranged on the pipeline communicated with the air outlet of the water sealing device.
Optionally, an opening for adding an alkaline solution into the water sealing device is formed in the water sealing device.
Optionally, the flue gas providing device further comprises a buffer tank, the buffer tank is arranged in the natural gas boiler and the sulfur dioxide gas cylinder and the pipeline communicated with the gas inlet of the washing tower, the gas inlet of the buffer tank is communicated with the natural gas boiler and the sulfur dioxide gas cylinder through pipelines respectively, and the gas outlet of the buffer tank is communicated with the gas inlet of the washing tower through a pipeline.
Preferably, the flue gas providing device further comprises a dust input device, and the dust input device is communicated with the air inlet of the buffer tank through a pipeline and is used for inputting dust into the buffer tank.
More preferably, the pipeline of the dust input device communicated with the gas inlet of the buffer tank and the pipeline of the sulfur dioxide gas cylinder communicated with the gas inlet of the buffer tank are the same pipeline.
Optionally, the liquid level of the simulated seawater in the water tank is below the bottom surface of the washing tower, the height difference between the liquid level of the simulated seawater in the water tank and the bottom surface of the washing tower is greater than 2.5m, and a pipeline of the water outlet of the washing tower, which is communicated with the simulated seawater, extends to be at least 0.5m below the liquid level of the simulated seawater.
Optionally, a suction pump is arranged in the flue gas analyzer, and the negative pressure generated by the suction pump is greater than the pressure of the air inlet of the fan.
Optionally, the air outlet of the fan and the pipeline communicated with the air inlet of the water seal device are communicated with the air outlet of the water seal device through a branch pipeline, the test system further comprises a first electromagnetic regulating valve and a second electromagnetic regulating valve, the first electromagnetic regulating valve is arranged on the pipeline between the branch pipeline and the air inlet of the water seal device, and the second electromagnetic regulating valve is arranged on the branch pipeline.
Preferably, the test system further comprises a first pressure transmitter, a detection head of the first pressure transmitter is arranged at the gas outlet of the first electromagnetic regulating valve, and a signal output port of the first pressure transmitter is electrically connected with the second electromagnetic regulating valve.
In another aspect, an embodiment of the present invention provides a method for testing an inert gas system scrubber, where the method includes:
injecting fresh water and adding sea salt into a water pool in the seawater supply device to form simulated seawater;
starting a water pump in the seawater supply device, and injecting the simulated seawater in the water tank into the washing tower;
opening a flue gas supply device and a fan, wherein mixed gas of flue gas generated by a natural gas boiler in the flue gas supply device and sulfur dioxide provided by a sulfur dioxide gas cylinder is driven by the fan and then is discharged into the atmosphere after being sequentially treated by the washing tower and the water seal device;
and respectively opening one of a first switch valve, a second switch valve and a third switch valve in the measuring device, and detecting the content of each component in the mixed gas by using a flue gas analyzer in the measuring device, wherein the components comprise sulfur dioxide gas, oxygen, water vapor and dust.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
through changing the flue gas providing device into natural gas boiler and sulfur dioxide gas cylinder from the auxiliary boiler on the crude oil ship, sulfur dioxide and dust's content is very low in the flue gas that the natural gas boiler produced, pollutes for can satisfy the environmental protection requirement on the land, make the experiment to the flue gas providing device can go on the land, sulfur dioxide gas cylinder can supply the sulfur dioxide that lacks in the flue gas simultaneously, realize the measuring to scrubbing tower processing sulfur dioxide ability. The fresh water resources on the land are relatively rich, the acquisition cost is relatively low, and the cargo oil pump can drive less clean fresh water to circularly flow on the land to consume the load required by the operation of the natural gas boiler, so that the cargo oil pump is not damaged, and the test cost can be greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a test system for an inert gas system scrubber according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for testing an inert gas system scrubber according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Example one
The embodiment of the invention provides a test system of an inert gas system washing tower, and referring to fig. 1, the test system comprises a seawater supply device 10, a flue gas supply device 20, a fan 30, a water seal device 40 and a measuring device 50.
In this embodiment, as shown in fig. 1, the seawater supply device 10 includes a water pump 11 and a pool 13 containing simulated seawater 12, the simulated seawater 12 is formed by dissolving sea salt in fresh water, a water inlet of the water pump 11 and a water outlet of the scrubber 60 are respectively communicated with the simulated seawater 12 through pipelines, and a water outlet of the water pump 11 is communicated with a water inlet of the scrubber 60 through a pipeline.
The flue gas providing device 20 comprises a natural gas boiler 21 and a sulfur dioxide gas cylinder 22, the natural gas boiler 21 and the sulfur dioxide gas cylinder 22 are respectively communicated with an air inlet of a washing tower 60 through pipelines, an air outlet of the washing tower 60 is communicated with an air inlet of a fan 30 through a pipeline, an air outlet of the fan 30 is communicated with an air inlet of a water sealing device 40 through a pipeline, an air outlet of the water sealing device 40 is communicated with the atmosphere through a pipeline, a water inlet of the water sealing device 40 is communicated with a water outlet of a water pump 11 through a pipeline, and a water outlet of the water sealing device 40 is communicated with the simulated.
The measuring device 50 comprises a flue gas analyzer 51, a first switch valve 52, a second switch valve 53 and a third switch valve 54, wherein the flue gas analyzer 51 is respectively communicated with the air inlet of the washing tower 60, the air outlet of the washing tower 60 and the air outlet of the water sealing device 40 through pipelines, the first switch valve 52 is arranged on the pipeline through which the flue gas analyzer 51 is communicated with the air inlet of the washing tower 60, the second switch valve 53 is arranged on the pipeline through which the flue gas analyzer 51 is communicated with the air outlet 60 of the washing tower, and the third switch valve 54 is arranged on the pipeline through which the flue gas analyzer 51 is communicated with the air outlet of the water sealing device 40.
According to the embodiment of the invention, the flue gas supply device is changed from the auxiliary boiler on the crude oil tanker into the natural gas boiler and the sulfur dioxide gas cylinder, so that the content of sulfur dioxide and dust in the flue gas generated by the natural gas boiler is very low, the pollution is low, and the environmental protection requirement on land can be met, so that the test on the flue gas supply device can be carried out on land, meanwhile, the sulfur dioxide gas cylinder can supplement the sulfur dioxide which is lacked in the flue gas, and the detection on the capability of the washing tower for treating the sulfur dioxide is realized. The fresh water resources on the land are relatively rich, the acquisition cost is relatively low, and the cargo oil pump can drive less clean fresh water to circularly flow on the land to consume the load required by the operation of the natural gas boiler, so that the cargo oil pump is not damaged, and the test cost can be greatly reduced.
Specifically, the water inlet of the scrubber 60 is above the water outlet of the scrubber 60, so that the simulated seawater 12 enters the scrubber from the water inlet of the scrubber 60 and then automatically flows back to the water outlet of the scrubber 60 after entering the flue gas treated in the scrubber.
In particular, the reservoir may have a water capacity of more than 300 cubic meters to accommodate enough simulated seawater 12 to be provided to the wash tower 60 and the hydro-seal arrangement 40.
Specifically, the pH value of the simulated seawater can be 7.9-8.4. The actual treatment environment of the scrubber 60 is simulated in keeping with the pH of normal seawater.
Alternatively, the liquid level of the simulated seawater 12 in the pool 11 may be below the bottom surface of the scrubber 60, and the height difference between the simulated seawater 12 in the pool 11 and the bottom surface of the scrubber 60 is greater than 2.5m, and the pipeline connecting the outlet of the scrubber 60 and the simulated seawater 12 extends to at least 0.5m below the simulated seawater 12 in the pool 11.
In practical application, the static pressure of the fan 30 is about 2700mmWG, and water seal can be formed in the washing tower 60 through the arrangement, so that air can not enter the washing tower 60 under the condition that the static pressure of the fan is less than 3000 mmWG.
Optionally, a suction pump may be disposed in the flue gas analyzer 51, and the negative pressure generated by the suction pump is greater than the pressure at the air inlet of the blower 30.
Optionally, the flue gas providing device 20 may further include a buffer tank 23, an air inlet of the buffer tank 23 is respectively communicated with the natural gas boiler 21 and the sulfur dioxide gas cylinder 22 through a pipeline, and an air outlet of the buffer tank 23 is communicated with an air inlet of the washing tower 60 through a pipeline.
That is, the inlet port of the buffer tank 23 is communicated with the natural gas boiler 21 through one pipe, while the inlet port of the buffer tank 23 is communicated with the sulfur dioxide gas cylinder 22 through another pipe, and further, the outlet port of the buffer tank 23 is communicated with the inlet port of the scrubbing tower 60 through another pipe.
Specifically, the pipeline through which the natural gas boiler 21 communicates with the gas inlet of the scrubber 60 may be composed of a pipeline through which the gas inlet of the buffer tank 23 communicates with the natural gas boiler 21 and a pipeline through which the gas outlet of the buffer tank 23 communicates with the gas inlet of the scrubber 60; the pipeline for communicating the sulfur dioxide gas cylinder 22 with the gas inlet of the washing tower 60 can be composed of a pipeline for communicating the gas inlet of the buffer tank 23 with the sulfur dioxide gas cylinder 22 and a pipeline for communicating the gas outlet of the buffer tank 23 with the gas inlet of the washing tower 60.
In practical application, the buffer tank 23 is arranged to enable flue gas generated by the natural gas boiler 21 and sulfur dioxide gas provided by the sulfur dioxide gas bottle 22 to be fully mixed therein, and finally, mixed gas with stable content of each component is provided.
Preferably, the flue gas providing device 20 may further include a dust input device, which is communicated with the air inlet of the buffer tank 23 through a pipeline for inputting dust into the buffer tank 23. Since the content of the dust in the flue gas generated by the natural gas boiler 21 is also low, the dust input device is arranged to input the dust in the flue gas generated by the natural gas boiler, so that the dust treatment capability of the scrubber 60 can be further detected.
More preferably, the pipeline through which the dust input device communicates with the gas inlet of the buffer tank 23 and the pipeline through which the sulfur dioxide gas cylinder 22 communicates with the gas inlet of the buffer tank 23 may be the same pipeline. Because the content detection of the sulfur dioxide gas in the flue gas and the content detection of the dust in the flue gas are separately carried out by the flue gas analyzer, the sulfur dioxide gas bottle 22 can be communicated with the gas inlet of the buffer tank 23 through a certain pipeline when the content of the sulfur dioxide is detected, so that the sulfur dioxide gas is mixed in the flue gas generated by the natural gas boiler; and when detecting dust content earlier with sulfur dioxide gas cylinder and this pipeline separately, throw into equipment and this pipeline intercommunication with the dust again to throw into the air inlet intercommunication of equipment through same pipeline and buffer tank 23 with the dust, sneak into the dust in the flue gas that the natural gas boiler produced, neither can influence flue gas analyzer like this to the measuring of scrubbing tower throughput, can reduce the setting of pipeline again, reduce experimental cost.
In other implementations, the pipeline connecting the dust input device and the gas inlet of the buffer tank 23 and the pipeline connecting the sulfur dioxide gas cylinder 22 and the gas inlet of the buffer tank 23 may be different pipelines.
Specifically, the water seal device 40 may include a water seal tower 41, and an air inlet pipe 42 and an air outlet pipe 43 inserted into the water seal tower 41, wherein one end of the air inlet pipe 42 inserted into the water seal tower 41 is inserted into the simulated seawater 12, one end of the air inlet pipe 42 outside the water seal tower 41 is an air inlet of the water seal device 40, one end of the air outlet pipe 43 inserted into the water seal tower 41 is above the liquid level of the simulated seawater 12, one end of the air outlet pipe 43 outside the water seal tower 41 is an air outlet of the water seal device 40, and a water inlet and a water outlet of the water seal device 40 are respectively disposed on the.
In practical application, flue gas treated by the scrubber 60 can enter the simulated seawater 12 in the water seal tower 41 from the inlet pipe 42 under the driving of the fan 30, and move to the upper surface of the liquid level of the simulated seawater 12 under the buoyancy action of the simulated seawater 12, and finally is discharged to the atmosphere from the outlet pipe 43. While atmospheric air cannot be reversed into the inlet pipe 41 under the blockage of the simulated seawater 12.
Alternatively, the end of the outlet pipe 43 outside the water seal tower 41 may be provided with a silencer to prevent noise from being generated when the gas is discharged.
Further, the water inlet of the water seal device 40 is located below the water outlet of the water seal device 40, so that the simulated seawater 12 in the washing tower 41 can be prevented from being completely discharged, and the water seal effect cannot be achieved.
Alternatively, the water seal device 40 may be provided with an opening for adding the alkaline solution into the water seal device 40. On one hand, the pH value of the simulated seawater 12 in the water seal tower 41 can be increased, the simulated seawater 12 in the water seal tower 41 is utilized to treat the flue gas treated by the washing tower 60 again, so that the sulfur dioxide in the flue gas is treated as clean as possible, and the environment pollution is avoided; on the other hand, the simulated seawater 12 in the water tank 11 can be exchanged to improve the pH value of the simulated seawater 12 in the water tank 11, so that the reduction of the pH value of the simulated seawater 12 in the water tank 11 due to the fact that the simulated seawater enters the scrubbing tower 60 to be processed with the flue gas is avoided, the flue gas processing effect of the scrubbing tower 60 is further influenced, and the accuracy of the detection result is finally influenced.
Specifically, the pH of the alkaline solution may be greater than 10 to achieve better treatment.
More specifically, the alkaline solution may be iodine solution.
In practical application, the fan 30 may be a fan in an inert gas system, and the water seal device 40 may also be a water seal device in the inert gas system, so as to improve the accuracy of the test and reduce the test cost.
Alternatively, a pipeline through which the air outlet of the blower 30 communicates with the air inlet of the water seal device 40 may communicate with the air outlet of the water seal device 40 through a branch pipeline 70.
Accordingly, the test system may further include a first solenoid-operated regulating valve 81 and a second solenoid-operated regulating valve 82, the first solenoid-operated regulating valve 81 being provided on the line between the branch line 70 and the air inlet of the water-seal apparatus 40, and the second solenoid-operated regulating valve 82 being provided on the branch line 70.
In practical application, by controlling the opening sizes of the first electromagnetic regulating valve 81 and the second electromagnetic regulating valve 82, when the gas discharged from the air outlet of the fan 30 is too much, the pressure can be timely released through the branch pipeline 70, and accidents caused by too much pressure in the pipeline can be avoided.
Specifically, the diameter of the pipe between the branch pipe 70 and the intake port of the water seal apparatus 40 may be larger than the diameter of the branch pipe 70.
More specifically, the diameter of the branch pipe 70 may be 250mm, the diameter of the pipe between the branch pipe 70 and the air inlet of the water seal device 40 may be 350mm, and the diameter of the pipe between the branch pipe 70 and the air outlet of the blower 30 may be 300 mm.
In addition, the diameter of the pipeline for communicating the air outlet of the water sealing device 40 with the atmosphere can be 350mm, so that the full emission of the flue gas is ensured.
Preferably, the testing system can further comprise a first pressure transmitter 83, a detection head of the first pressure transmitter 83 is arranged at the air outlet of the first electromagnetic regulating valve 81, and a signal output port of the first pressure transmitter 83 is electrically connected with the second electromagnetic regulating valve 82. To achieve automatic adjustment of the second electromagnetic adjusting valve 82 with the first pressure transmitter 83.
More preferably, the testing system may further include a third electromagnetic adjusting valve 84, the third electromagnetic adjusting valve 84 is electrically connected to the blower 30, and the third electromagnetic adjusting valve 84 is disposed at the air outlet of the blower 30.
In practical application, the larger the opening of the third electromagnetic regulating valve 84 is, the larger the gas flow rate is, and the larger the load of the fan 30 is; conversely, the smaller the opening of the third electromagnetic adjustment valve 84, the smaller the gas flow rate, and the smaller the load on the fan 30. The third electromagnetic adjusting valve 84 automatically adjusts the opening size according to the current signal (the current is in direct proportion to the load) of the fan 30, so that the load of the fan 30 can be automatically adjusted within a certain range, and the fan 30 is prevented from being overloaded.
Further, the testing system may further include a second pressure transmitter 85, and a detection head of the second pressure transmitter 85 is disposed on a pipeline where the air outlet of the third electromagnetic regulating valve 84 communicates with the branch pipeline 70, so as to monitor the pressure at the air outlet of the blower 30.
Still further, the testing system may further include a third pressure transmitter 86, and a detection head of the third pressure transmitter 86 is disposed on a pipeline connecting the water inlet of the washing tower 60 and the water pump 11, so as to monitor the pressure inside the washing tower 60.
In a specific implementation, a first flow meter 91 may be provided on a pipeline connecting the water inlet of the scrubber 60 and the water pump 11, so as to cooperate with a regulating valve (such as a butterfly valve) to control the flow rate of the simulated seawater 12 injected into the scrubber 60.
Specifically, the first flow meter 91 may be an electromagnetic flow meter.
Accordingly, a second flow meter 92 may be disposed on the pipeline connecting the air inlet of the scrubber 60 and the buffer tank 23, so as to conveniently cooperate with the regulating valve to control the flow rate of the flue gas injected into the scrubber 60.
Specifically, the second flow meter 92 may be a pitot tube flow meter.
Further, a third flow meter 93 may be provided on a pipeline connecting the sulfur dioxide gas cylinder 22 and the buffer tank 23, so as to control the flow rate of the sulfur dioxide gas mixed into the flue gas generated by the natural gas boiler in cooperation with the regulating valve.
In particular, the third flow meter 93 may be a pitot tube flow meter.
In practical application, a fourth switch valve 94 may be disposed on a pipeline connecting the water pump 11 and the water inlet of the washing tower 60, a fifth switch valve 95 may be disposed on a pipeline connecting the natural gas boiler 21 and the buffer tank 23, a sixth switch valve 96 may be disposed on a pipeline connecting the sulfur dioxide gas cylinder 22 and the buffer tank 23, a seventh switch valve 97 may be disposed on a pipeline connecting the water pump 11 and the water inlet of the water seal device 40, and an eighth switch valve 98 may be disposed on a pipeline connecting the water outlet of the water seal device 40 and the simulated seawater 12, so as to correspondingly control the on-off of the pipeline where the water pump is disposed.
Example two
The embodiment of the invention provides a test method of an inert gas system washing tower, and referring to fig. 2, the test method comprises the following steps:
step 201: fresh water and sea salt are injected into a pool in the seawater supply device to form simulated seawater.
Optionally, the step 201 may include:
firstly, fresh water is injected into a pool.
And secondly, adding sea salt into the fresh water.
And step three, detecting the pH value of the fresh water added with the sea salt. If the detected pH value is less than the set value, executing the second step again; if the detected pH value is equal to the set value, simulating the formation of seawater; and if the detected pH value is larger than the set value, executing the fourth step.
And fourthly, adding the acid solution into the fresh water, and executing the third step again.
In practical application, the set value may be a pH value of seawater in a navigation sea area of the ship. If the pH of the sea water in the marine vessel's sailing sea area is more than one, the minimum of the pH values may be selected.
Step 202: and starting a water pump in the seawater supply device, and injecting the simulated seawater in the water tank into the washing tower.
In practical application, the water pump and a fourth switch valve arranged on a pipeline for communicating the water inlet of the washing tower with the water pump are opened, the water pump drives simulated seawater in the water tank to enter the washing tower from the water inlet of the washing tower, and the simulated seawater flows back to the water tank from the water outlet of the washing tower after being sprayed in the washing tower.
Furthermore, the flow of the simulated seawater injected into the washing tower can be controlled by utilizing a first flow meter and a corresponding regulating valve which are arranged on a pipeline for communicating the water inlet of the washing tower with the water pump.
Step 203: and (3) opening the flue gas supply device and the fan, and discharging the mixed gas of the flue gas generated by the natural gas boiler in the flue gas supply device and the sulfur dioxide provided by the sulfur dioxide gas cylinder into the atmosphere after being sequentially treated by the washing tower and the water seal device under the driving of the fan.
In practical application, a fifth switch valve of a pipeline where the natural gas boiler is located and a sixth switch valve of a pipeline where the sulfur dioxide gas cylinder is located are opened, flue gas generated by the natural gas boiler and sulfur dioxide provided by the sulfur dioxide gas cylinder are mixed in a buffer tank in a flue gas providing device, and mixed gas is driven by a fan to be sequentially treated by a washing tower and a water sealing device and then discharged into the atmosphere.
Furthermore, a sixth flowmeter and a corresponding regulating valve which are arranged on a pipeline for communicating the air inlet of the washing tower with the buffer tank can be used for controlling the flow of the flue gas injected into the washing tower; and controlling the flow of the sulfur dioxide gas mixed in the flue gas by using a third flow meter and a corresponding regulating valve which are arranged on a pipeline for communicating the sulfur dioxide gas cylinder with the buffer tank.
In addition, the pressure of the pipeline in which the first electromagnetic regulating valve is arranged can be regulated to a conventional value on the ship, such as 500 mmWG.
Step 204: and respectively opening one of a first switch valve, a second switch valve and a third switch valve in the measuring device, and detecting the content of each component in the mixed gas by using a flue gas analyzer in the measuring device, wherein the components comprise sulfur dioxide gas, oxygen, water vapor and dust.
In practical application, the sulfur content in the treated mixed gas is required to be less than 100ppm, the moisture content is less than 1g/kg, the particle content is less than 1 percent of the original content, and the temperature difference with the simulated seawater is not more than 5 ℃.
Optionally, the assay method may further comprise:
adding alkaline solution into the simulated seawater in the water seal device.
Through the pH value that improves the simulation sea water in the water seal arrangement, sulfur dioxide gas in the sulfur gas can fully be filtered out, avoids sulfur dioxide gas to discharge the polluted environment in the atmosphere.
Further, the test method may further comprise:
and starting the water pump to exchange the simulated seawater in the water seal device with the simulated seawater in the water tank.
It should be noted that, because the simulated seawater in the water tank reacts with the sulfur dioxide gas in the scrubber, the pH value of the simulated seawater decreases after flowing back to the water tank, and the simulated seawater added with the alkaline solution is exchanged with the simulated seawater in the water tank, so that the pH value of the simulated seawater in the water tank can be increased, the stability of the pH value of the simulated seawater in the water tank is maintained, the treatment capacity of the scrubber is prevented from being affected, and the detection accuracy is improved.
According to the embodiment of the invention, the flue gas supply device is changed from the auxiliary boiler on the crude oil tanker into the natural gas boiler and the sulfur dioxide gas cylinder, so that the content of sulfur dioxide and dust in the flue gas generated by the natural gas boiler is very low, the pollution is low, the environmental protection requirement that the heavy oil boiler is not allowed to be used on land can be met, meanwhile, the sulfur dioxide gas cylinder can supplement the sulfur dioxide which is lacked in the flue gas, the detection of the sulfur dioxide treated by the washing tower is realized, and the test is transferred to the land from the sea. The fresh water resources on the land are relatively rich, the acquisition cost is relatively low, and the cargo oil pump can drive less clean fresh water to circularly flow on the land to consume the load required by the operation of the natural gas boiler, so that the cargo oil pump is not damaged, and the test cost can be greatly reduced.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A test system of an inert gas system washing tower is characterized in that the test system comprises a seawater supply device, a flue gas supply device, a fan, a water seal device and a measuring device;
the seawater supply device comprises a water pump and a water pool containing simulated seawater, the simulated seawater is formed by dissolving sea salt in fresh water, a water inlet of the water pump and a water outlet of the washing tower are respectively communicated with the simulated seawater through pipelines, and a water outlet of the water pump is communicated with a water inlet of the washing tower through a pipeline;
the flue gas supply device comprises a natural gas boiler and a sulfur dioxide gas cylinder, the natural gas boiler and the sulfur dioxide gas cylinder are respectively communicated with a gas inlet of the washing tower through pipelines, a gas outlet of the washing tower is communicated with a gas inlet of the fan through a pipeline, a gas outlet of the fan is communicated with a gas inlet of the water seal device through a pipeline, a gas outlet of the water seal device is communicated with the atmosphere through a pipeline, a water inlet of the water seal device is communicated with a water outlet of the water pump through a pipeline, and a water outlet of the water seal device is communicated with the simulated seawater through a pipeline; an opening for adding alkaline solution into the water sealing device is formed in the water sealing device, and the pH value of the alkaline solution is greater than 10;
the measuring device comprises a flue gas analyzer, a first switch valve, a second switch valve and a third switch valve, wherein the flue gas analyzer is communicated with the air inlet of the washing tower, the air outlet of the washing tower and the air outlet of the water sealing device through pipelines respectively, the first switch valve is arranged on the pipeline communicated with the air inlet of the washing tower, the second switch valve is arranged on the pipeline communicated with the air outlet of the washing tower, and the third switch valve is arranged on the pipeline communicated with the air outlet of the water sealing device.
2. The test system according to claim 1, wherein the flue gas supply device further comprises a buffer tank, a gas inlet of the buffer tank is respectively communicated with the natural gas boiler and the sulfur dioxide gas cylinder through a pipeline, and a gas outlet of the buffer tank is communicated with a gas inlet of the washing tower through a pipeline.
3. The testing system of claim 2, wherein the flue gas providing apparatus further comprises a dust input device in communication with the air inlet of the buffer tank via a pipe for inputting dust into the buffer tank.
4. The testing system of claim 3, wherein the pipeline through which the dust input device communicates with the gas inlet of the buffer tank and the pipeline through which the sulfur dioxide gas cylinder communicates with the gas inlet of the buffer tank are the same pipeline.
5. The testing system according to any one of claims 1 to 4, wherein the liquid level of the simulated seawater in the water tank is below the bottom surface of the washing tower, the height difference between the liquid level of the simulated seawater in the water tank and the bottom surface of the washing tower is greater than 2.5m, and a pipeline for communicating the water outlet of the washing tower with the simulated seawater extends to be at least 0.5m below the liquid level of the simulated seawater.
6. The test system according to any one of claims 1 to 4, wherein a suction pump is arranged in the flue gas analyzer, and the negative pressure generated by the suction pump is greater than the pressure of the air inlet of the fan.
7. The testing system according to any one of claims 1 to 4, wherein a pipeline through which the air outlet of the fan is communicated with the air inlet of the water sealing device is communicated with the air outlet of the water sealing device through a branch pipeline, the testing system further comprises a first electromagnetic regulating valve and a second electromagnetic regulating valve, the first electromagnetic regulating valve is arranged on the pipeline between the branch pipeline and the air inlet of the water sealing device, and the second electromagnetic regulating valve is arranged on the branch pipeline.
8. The testing system of claim 7, further comprising a first pressure transmitter, wherein a detection head of the first pressure transmitter is disposed at an air outlet of the first electromagnetic regulating valve, and a signal output port of the first pressure transmitter is electrically connected with the second electromagnetic regulating valve.
9. A test method for an inert gas system scrubber, the test method being suitable for use in a test system according to any one of claims 1 to 8, the test method comprising:
injecting fresh water and adding sea salt into a water pool in the seawater supply device to form simulated seawater;
starting a water pump in the seawater supply device, and injecting the simulated seawater in the water tank into the washing tower;
opening a flue gas supply device and a fan, wherein mixed gas of flue gas generated by a natural gas boiler in the flue gas supply device and sulfur dioxide provided by a sulfur dioxide gas cylinder is driven by the fan and then is discharged into the atmosphere after being sequentially treated by the washing tower and the water seal device;
respectively opening one of a first switch valve, a second switch valve and a third switch valve in the measuring device, and detecting the content of each component in the mixed gas by using a flue gas analyzer in the measuring device, wherein the components comprise sulfur dioxide gas, oxygen, water vapor and dust;
the assay method further comprises:
and adding an alkaline solution into the simulated seawater in the water seal device, wherein the pH value of the alkaline solution is more than 10.
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| CN115055033A (en) * | 2022-02-25 | 2022-09-16 | 上海亨远船舶设备有限公司 | Desulfurization method of flue gas type inert gas for ship |
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| CN101659316A (en) * | 2009-09-15 | 2010-03-03 | 王德荣 | Marine inert gases system |
| CN201880464U (en) * | 2010-11-17 | 2011-06-29 | 东方电气集团东方锅炉股份有限公司 | Seawater desulfurizer |
| CN102151481B (en) * | 2011-02-17 | 2012-11-07 | 大连海事大学 | Monitoring and automatic control system in desulfurization process for magnesium-based seawater ships |
| CN202901818U (en) * | 2012-11-13 | 2013-04-24 | 上海船舶研究设计院 | Air supply system for supplying inert gas for oil compartment on oil ship |
| CN104443897A (en) * | 2014-10-31 | 2015-03-25 | 浙江海洋学院 | Comprehensive treatment device and method for crude oil tank emergent gas and ship tail gas recycle |
| CN104316657B (en) * | 2014-11-10 | 2016-04-20 | 大连海事大学 | A kind of simulation marine exhaust system for wet scrubbing |
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