CN112619341A - Nearly zero release's inert gas system - Google Patents
Nearly zero release's inert gas system Download PDFInfo
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- CN112619341A CN112619341A CN202011371288.5A CN202011371288A CN112619341A CN 112619341 A CN112619341 A CN 112619341A CN 202011371288 A CN202011371288 A CN 202011371288A CN 112619341 A CN112619341 A CN 112619341A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
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Abstract
The invention discloses a near-zero emission inert gas system, which comprises a combustion type inert gas generator, a wet electrostatic dust collector, a deck water seal and a PV releaser, wherein the combustion type inert gas generator comprises a combustion chamber and a washing tower, the flue gas type inert gas generator comprises a washing tower, the wet electrostatic dust collector, the deck water seal and the PV releaser, the system adopts the wet electrostatic dust collector as final fine treatment technical equipment of an atmosphere composite pollutant control system, the problem of high content of gas supply pollutants of the inert gas system is solved, and the smoke emission limit value is controlled.
Description
Technical Field
The invention belongs to the field of waste gas treatment, and particularly relates to a near-zero emission inert gas system.
Background
The working process of the inert gas system determines that the flue gas or boiler flue gas and washing water generated by the inert gas system necessarily contain certain soot, moisture, fuel oil impurities and pollutants in oil, so that the inert gas system brings the following effects after being used:
and (3) polluting goods: the prior inert gas system is mainly used for crude oil transport ships, has less application to finished oil and chemical ships with higher requirements on moisture and impurity content, and the components of the inert gas also limit the use places of the inert gas;
and (3) atmosphere pollution: when the inert gas is unqualified and in normal use, redundant inert gas needs to be exhausted, so pollutants generated by combusting diesel oil can pollute the atmosphere;
polluting a water body; most pollutants in the inert gas system are discharged into the sea along with washing water without any treatment, and at present, a maritime department only has certain requirements on the existence of obvious visible oil stains and lacks supervision on the real pollution of the visible oil stains.
In recent two years, most of wet-type electric dust collectors adopt vertical wet-type electric dust collectors, and the anode plates of the vertical wet-type electric dust collectors are mostly made of conductive glass fiber reinforced plastics and have honeycomb structures. After market research, Nantong Adita engineering technology Limited company finds that the conductive glass fiber reinforced plastic honeycomb wet-type electric dust collector has the advantages, but the biggest defect is that the anode plate has general conductivity, so the power consumption is larger, and particularly, the pollution of the production of the glass fiber reinforced plastic and the waste products to the environment is difficult to solve. The honeycomb wet-type electric dust remover with the titanium plate as the anode is developed by taking the titanium plate as the breakthrough, the advantages of the wet-type electric dust remover are integrated, the power consumption and the water consumption of the conventional vertical honeycomb wet-type electric dust remover are further reduced, and the dust removal efficiency is also improved. The inert gas system in the invention combines a wet electric dust collector developed by Nantong Asiatai engineering technology Limited.
Therefore, the 'near zero emission' transformation and upgrading of the inert gas system are considered to be very necessary, the pollution problem can be solved, the application range and the place of the product can be expanded, the market share is increased, and the win-win effect of the society and the economic benefit is realized.
Disclosure of Invention
In view of the above problems, the main objective of the present invention is to design a near-zero emission inert gas system, which uses a wet electrostatic precipitator as a final fine treatment technical equipment of an atmosphere composite pollutant control system, to solve the problem of high content of gas supply pollutants of the inert gas system, and to control the smoke emission limit.
In order to achieve the purpose, the invention adopts the following technical scheme:
the near-zero emission inert gas system comprises a combustion type inert gas generator, a wet type electrostatic dust collector, a deck water seal and a PV releaser, wherein the combustion type inert gas generator comprises a combustion chamber and a washing tower, and the flue gas type inert gas generator comprises a washing tower, a wet type electrostatic dust collector, a deck water seal and a PV releaser;
when the inert gas system is of a combustion type, an air inlet pipe and an oil supply and return pipeline are arranged at the front part of the combustion chamber, an inert gas fan is arranged on the air inlet pipe, a group of seawater cooling and spraying devices are arranged at the central part of the combustion chamber, a group of downward-spraying seawater cooling and spraying devices are arranged in the washing tower, a metal defoaming device is arranged above the seawater cooling and spraying devices in the washing tower, an air supply pipeline is arranged at the outlet of the washing tower, the air supply pipeline is provided with two branch lines, a wet electrostatic dust collector is arranged on one branch line, a deck water seal is arranged on the other branch line, an emptying valve is arranged on the branch line of the wet electrostatic dust collector, an air supply valve is arranged on the branch line of the deck water seal, a secondary line is arranged behind the air supply valve, a discharge valve is arranged on the secondary line, the air supply valve and the discharge valve are separated by a bulkhead, two branch lines are, the PV releaser is arranged on the other branch line, a steam inlet and a steam outlet are respectively arranged below the deck water seal, and a wet electrostatic dust collector is connected to the deck water seal;
when the inert gas system is of a flue gas type, an air inlet pipe is arranged in front of the washing tower, a group of seawater cooling and spraying devices is arranged at an inlet of the washing tower, a metal defoaming device, a seawater cooling and spraying device and a metal defoaming device are sequentially arranged in the washing tower, an air supply pipeline is arranged at an outlet of the washing tower, an inert gas fan is arranged on the air supply pipeline, two branch lines are arranged behind the inert gas fan, a wet electrostatic dust collector is arranged on one branch line, a deck water is arranged on the other branch line in a sealed mode, an emptying valve is arranged on each branch line of the wet electrostatic dust collector, an air supply valve is arranged on each branch line of a deck water seal, a secondary line is arranged behind the air supply valve, a discharge valve is arranged on each secondary line, the air supply valve and the discharge valve are separated by a bulkhead, two branch lines are arranged behind the wet electrostatic dust collector, an emptying valve is arranged on one branch line, a PV release is arranged on the, The steam outlet and the deck water seal are connected with a wet electrostatic dust collector.
As a further description of the present invention, when the inert gas system is of a combustion type, the front part of the combustion chamber is provided with an air inlet pipe, an oil supply pipeline and an oil return pipeline, the air inlet pipe is provided with an inert gas fan, the central part of the combustion chamber is provided with a group of seawater cooling and spraying devices, the washing tower is internally provided with a group of downward-spraying seawater cooling and spraying devices, the seawater cooling and spraying devices in the washing tower are provided with a metal defoaming device above, the outlet of the washing tower is provided with an air supply pipeline, the wet electrostatic precipitator is arranged on the air supply pipeline, the deck water seal is arranged on the air supply pipeline behind the wet electrostatic precipitator, the air supply pipeline between the deck water seal and the wet electrostatic precipitator is provided with an air supply valve and a secondary line, the secondary line and the deck water seal are arranged outside the bulkhead, a branch line is arranged between the secondary line and the air supply valve, the branch line is provided, a branch line is arranged on the deck water seal, a PV releaser is arranged on the branch line, and a steam inlet and a steam outlet are respectively arranged below the deck water seal;
when the inert gas system is of a flue gas type, an air inlet pipe is arranged in front of the washing tower, a group of seawater cooling and spraying devices is arranged at an inlet of the washing tower, a metal defoaming device, a seawater cooling and spraying device and a metal defoaming device are sequentially arranged in the washing tower, an air supply pipeline is arranged at an outlet of the washing tower, an inert gas fan is arranged on the air supply pipeline, a wet electrostatic dust collector is arranged behind the inert gas fan, the wet electrostatic dust collector is arranged on the air supply pipeline, a deck water seal is arranged on the air supply pipeline behind the wet electrostatic dust collector, an air supply valve and a secondary line are arranged on the air supply pipeline between the deck water seal and the wet electrostatic dust collector, a discharge valve is arranged on the secondary line, the secondary line and the deck water seal are arranged on the outer side of the bulkhead, a branch line is arranged between the secondary line and the air supply valve, an evacuation valve is arranged on the branch, the PV releaser is arranged on the branch line, and a steam inlet and a steam outlet are respectively arranged below the deck water seal.
As a further description of the invention, when the inert gas system is of the flue gas type, the metal demister inside the scrubber is lower than the outlet of the scrubber.
As a further description of the invention, the gas supply pipeline is provided with a sampling tube, and the sampling tube is connected with a monitoring instrument.
As a further description of the invention, when the inert gas system is of a combustion type, two inert gas fans are arranged and are respectively arranged on the two gas inlet pipes.
As a further description of the present invention, when the inert gas system is of a flue gas type, two inert gas fans are provided, the gas supply line is provided with two branch lines, and the inert gas fans are respectively provided on the two branch lines.
As a further description of the invention, when the inert gas system is of a combustion type or a flue gas type, a blowdown and oil discharge pipe is arranged below the washing tower.
As a further description of the invention, when the inert gas system is of a combustion type or a flue gas type, a sewage and dirty oil comprehensive treatment unit is arranged below the deck water seal.
Compared with the prior art, the invention has the technical effects that:
the invention provides a near-zero emission inert gas system, which adopts a wet electrostatic dust collector as final fine treatment technical equipment of an atmosphere composite pollutant control system, is used for removing dust and gypsum slurry fog drops after wet desulphurization, controlling the emission of PM2.5, solving the problems of smoke emission turbidity and the like, and can control the smoke emission limit value below 5mg/Nm 3;
the PV releaser has the main function of preventing the cabin from being damaged due to overhigh pressure in the cabin or vacuum in the cabin, thereby playing a role in protecting the cabin;
the deck water seal is one of main devices of the inert gas system, when an oil tanker sails on the sea, the hull inevitably pitches and rolls due to wind and waves, if no reliable non-return device is arranged, mixed gas (oil gas, inert gas and a small amount of air) in an oil tank can flow back to a mechanical place of the inert gas or other safety places, and the deck water seal device has the function of preventing the mixed gas from flowing back and is arranged at the tail end of an inert gas output main pipeline of the system and installed on a deck of the oil tanker.
Drawings
FIG. 1 is a combustion type view of embodiment 1 of the present invention;
FIG. 2 is a smoke-type view of example 1 of the present invention;
FIG. 3 is a combustion type view of embodiment 2 of the present invention;
figure 4 is a smoke-type view of example 2 of the present invention.
In the figure, 1, a wet electrostatic dust collector, 2, a deck water seal, 3, a PV releaser, 4, a combustion chamber, 41, a seawater cooling and spraying device, 5, a washing tower, 51, a metal defoaming device and 6, an inert gas fan.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
the near-zero emission inert gas system is divided into two examples according to different implementation modes, wherein each example comprises a combustion type structure and a smoke type structure, and the implementation modes are as follows:
example 1:
as shown in figure 1, the combustion type of the near zero emission inert gas system comprises an inert gas generator, a wet electrostatic dust collector 1, a deck water seal 2 and a PV releaser 3, wherein the inert gas generator consists of a combustion chamber 4 and a washing tower 5.
The front part of the combustion chamber 4 is provided with an air inlet pipe and oil supply and return pipelines, the air inlet pipe is provided with an inert gas fan 6, the central part of the combustion chamber 4 is provided with a group of seawater cooling spray devices 41 (used for primary cooling and removing sulfur and dust particles in flue gas by seawater), the washing tower 5 is internally provided with a group of downward-spraying seawater cooling spray devices 41, a metal defoaming device 51 (a layer of which is used for removing impurities and water vapor in flue gas) is arranged above the seawater cooling spray devices 41 in the washing tower 5, the outlet of the washing tower 5 is provided with an air supply pipeline, the lower part of the washing tower 5 is provided with a sewage discharge pipe and an oil discharge pipe, the air supply pipeline is provided with two branch pipelines, the wet electrostatic dust collector 1 is arranged on one branch pipeline, the deck water seal 2 is arranged on the other branch pipeline, the branch pipeline of the wet electrostatic dust collector 1 is provided with an emptying valve, and, the back of the air supply valve is provided with a secondary line, the secondary line is provided with a discharge valve, the air supply valve and the discharge valve are separated through a bulkhead, the back of the wet electrostatic dust collector 1 is provided with two branch lines, one branch line is provided with an emptying valve, the PV releaser 3 is arranged on the other branch line, the lower part of the deck water seal 2 is respectively provided with a steam inlet and a steam outlet, and the deck water seal 2 is connected with the wet electrostatic dust collector 1.
A flowmeter is arranged in the air inlet pipe.
The gas supply pipeline is provided with a sampling pipe, the sampling pipe is connected with a monitoring instrument, gas is introduced into the monitoring instrument for analysis, the result is transmitted to the control system, and the control system controls the action of a valve and the like according to a set value.
The two inert gas fans 6 are respectively arranged on the two air inlet pipes and are used for providing air which can be fully combusted for the combustion chamber 4 and delivering the combusted smoke to the inert gas main pipe.
The lower part of the washing tower 5 is provided with a sump oil cabin and a comprehensive sewage and sump oil treatment unit, the lower part of the deck water seal 2 is provided with a comprehensive sewage and sump oil treatment unit, and the waste liquid achieves near zero emission through the treatment of the unit.
When the inert gas system is in a combustion type, the inert gas fan 6 sends air to the combustion chamber 4, after diesel oil is fully combusted, oxygen in flue gas is removed, the air from the combustion chamber 4 is primarily cooled by the seawater cooling and spraying device 41 for 1 time in the combustion chamber 4 of the inert gas generator, then partial soot, oil gas and impurities in the inert gas are removed by the washing tower 5 of the inert gas generator, the washed inert gas is sent to the gas supply pipeline, a monitoring instrument can monitor the oxygen content of the inert gas on line, and the oxygen content is monitored by the automatic control system;
1. qualified inert gas passes through the deck water seal 2 backwards;
2. unqualified inert gas is treated by a wet electrostatic dust collector 1 to achieve near zero emission and emptying of particulate matters;
3. when the oxygen content in the inert gas is less than 5%, the system closes the emptying valve, opens the gas supply valve, closes the normally open discharge valve at the front part of the deck water seal 2 at the same time, processes the qualified inert gas through the wet electrostatic dust collector 1, achieves near zero emission and sends the inert gas to the cabin, the oxygen analyzer samples at the outlet of the inert gas generator, detects the oxygen concentration in the inert gas, and controls the work of the system valve according to the detected oxygen concentration so as to ensure that the inert gas supplied to the cabin meets the design requirements.
As shown in figure 2, the nearly zero emission inert gas system comprises a scrubbing tower 5, a wet electrostatic dust collector 1, a deck water seal 2 and a PV releaser 3.
An air inlet pipe is arranged in front of the washing tower 5, a group of seawater cooling spray devices 41 (used as primary cooling, seawater can remove sulfur and dust particles in flue gas) are arranged at an inlet of the washing tower 5, a metal defoaming device 51, the seawater cooling spray devices 41 and the metal defoaming device 51 are sequentially arranged in the washing tower 5, a sewage discharge pipe and an oil discharge pipe are arranged below the washing tower 5, an air supply pipeline is arranged at an outlet of the washing tower 5, an inert gas fan 6 is arranged on the air supply pipeline, two branch lines are arranged behind the inert gas fan 6, the wet electrostatic dust collector 1 is arranged on one branch line, the water seal deck 2 is arranged on the other branch line, an emptying valve is arranged on the branch line of the wet electrostatic dust collector 1, an air supply valve is arranged on the branch line of the deck water seal 2, a sub-line is arranged behind the air supply valve, a discharge valve is arranged on the sub-line, the air supply valve and the discharge valve are separated by a bulkhead, two branch lines are, an emptying valve is arranged on one branch line, a PV releaser 3 is arranged on the other branch line, a steam inlet and a steam outlet are respectively arranged below the deck water seal 2, and the deck water seal 2 is connected with a wet electrostatic dust collector 1.
A flowmeter is arranged in the air inlet pipe.
The metal defoaming device 51 in the washing tower 5 is lower than the outlet of the washing tower 5, and a second layer of metal defoaming device 51 is arranged in front of the flue gas outlet, so that impurities and water vapor in the flue gas can be further removed.
The gas supply pipeline is provided with a sampling pipe, the sampling pipe is connected with a monitoring instrument, gas is introduced into the monitoring instrument for analysis, the result is transmitted to the control system, and the control system controls the action of a valve and the like according to a set value.
The system is provided with two centrifugal fans which are used for one purpose and one standby and need to be selectively switched before the system runs.
The lower part of the washing tower 5 is provided with a sump oil cabin and a comprehensive sewage and sump oil treatment unit, the lower part of the deck water seal 2 is provided with a comprehensive sewage and sump oil treatment unit, and the waste liquid achieves near zero emission through the treatment of the unit.
When the inert gas system is in a flue gas type, the inert gas fan 6 sends the boiler flue gas treated by the washing tower 5 to the gas supply pipeline, and the monitoring instrument monitors the oxygen content of the inert gas on line and monitors the inert gas through the automatic control system;
1. qualified inert gas passes through the deck water seal 2 backwards;
2. unqualified inert gas is treated by a wet electrostatic dust collector 1 to achieve near zero emission and emptying of particulate matters;
3. when the oxygen content in the inert gas is less than 5%, the system closes the emptying valve, opens the gas supply valve, closes the normally open bleed valve at the front part of the deck water seal at the same time, processes the qualified inert gas through the wet electrostatic dust collector 1, achieves near zero emission and sends the inert gas to the cabin, the oxygen analyzer samples at the outlet of the washing tower 5, detects the concentration of the oxygen in the inert gas, and controls the work of the system valve according to the detected oxygen concentration so as to ensure that the inert gas supplied to the cabin meets the design requirements.
Example 2:
as shown in figure 3, the combustion type of the near zero emission inert gas system comprises an inert gas generator, a wet electrostatic dust collector 1, a deck water seal 2 and a PV releaser 3, wherein the inert gas generator consists of a combustion chamber 4 and a washing tower 5.
The front part of the combustion chamber 4 is provided with an air inlet pipe and an oil supply and return pipeline, the air inlet pipe is provided with an inert gas fan 6, the central part of the combustion chamber 4 is provided with a group of seawater cooling spray devices 41 (used as primary cooling for removing sulfur and dust particles in flue gas by seawater), the washing tower 5 is internally provided with a group of downward-spraying seawater cooling spray devices 41, a metal defoaming device 51 (for removing impurities and water vapor in flue gas by entering a layer) is arranged above the seawater cooling spray devices 41 in the washing tower 5, the outlet of the washing tower 5 is provided with an air supply pipeline, the wet electrostatic dust collector 1 is arranged on the air supply pipeline, the deck water seal 2 is arranged on the air supply pipeline behind the wet electrostatic dust collector 1, the air supply pipeline between the deck water seal 2 and the wet electrostatic dust collector 1 is provided with an air supply valve and a secondary line, the secondary line is provided with a discharge valve, and the deck water seal 2 are arranged outside, a branch line is arranged between the secondary line and the air supply valve, an emptying valve is arranged on the branch line, the branch line is arranged on the outer side of the cabin wall, the deck water seal 2 is provided with the branch line, a PV releaser 3 is arranged on the branch line, and a steam inlet and a steam outlet are respectively arranged below the deck water seal 2.
A flowmeter is arranged in the air inlet pipe.
The gas supply pipeline is provided with a sampling pipe, the sampling pipe is connected with a monitoring instrument, gas is introduced into the monitoring instrument for analysis, the result is transmitted to the control system, and the control system controls the action of a valve and the like according to a set value.
The two inert gas fans 6 are respectively arranged on the two air inlet pipes and are used for providing air which can be fully combusted for the combustion chamber 4 and delivering the combusted smoke to the inert gas main pipe.
The lower part of the washing tower 5 is provided with a sump oil cabin and a comprehensive sewage and sump oil treatment unit, the lower part of the deck water seal 2 is provided with a comprehensive sewage and sump oil treatment unit, and the waste liquid achieves near zero emission through the treatment of the unit.
When the inert gas system is a combustion type, the inert gas fan 6 sends air to the combustion chamber 4, after diesel oil is fully combusted, oxygen in flue gas is removed, 1 time of seawater cooling and spraying device 41 of the combustion chamber 4 of the inert gas generator is used for carrying out primary cooling on the gas coming out of the combustion chamber 4, then partial soot, oil gas and impurities in the inert gas are removed through the washing tower 5 of the inert gas generator, the washed inert gas is sent to a gas supply pipeline, a monitoring instrument can monitor the oxygen content of the inert gas on line and is monitored through an automatic control system, the inert gas is treated through the wet electrostatic dust collector 1, and the following conditions are divided after treatment:
1. the flue gas is treated by the wet electrostatic dust collector 1 and is conveyed backwards to reach the near zero emission standard;
2. the unqualified inert gas is treated by the wet electrostatic dust collector 1, so that near zero emission of particles is achieved, and the particles are directly emptied;
3. when the oxygen content in the inert gas is less than 5%, the system closes the emptying valve, opens the gas supply valve, closes the normally open bleeder valve at the front part of the deck water seal 2 to send qualified inert gas to the cabin, samples at the outlet of the washing tower 5 by the oxygen analyzer, detects the oxygen concentration in the inert gas, and controls the work of the system valve according to the detected oxygen concentration so as to ensure that the inert gas supplied to the cabin meets the design requirements.
As shown in figure 4, the nearly zero emission inert gas system comprises a scrubbing tower 5, a wet electrostatic dust collector 1, a deck water seal 2 and a PV releaser 3.
An air inlet pipe is arranged in front of the washing tower 5, a group of seawater cooling and spraying devices 41 (used as primary cooling, seawater can remove sulfur and dust particles in flue gas) are arranged at an inlet of the washing tower 5, a metal defoaming device 51, the seawater cooling and spraying devices 41 and the metal defoaming device 51 are sequentially arranged in the washing tower 5, a sewage discharge pipe and an oil discharge pipe are arranged below the washing tower 5, an air supply pipeline is arranged at an outlet of the washing tower 5, an inert gas fan 6 is arranged on the air supply pipeline, a wet electrostatic dust collector 1 is arranged behind the inert gas fan 6, the wet electrostatic dust collector 1 is arranged on the air supply pipeline, a deck water seal 2 is arranged on the air supply pipeline behind the wet electrostatic dust collector 1, an air supply valve and a secondary line are arranged on the air supply pipeline between the deck water seal 2 and the wet electrostatic dust collector 1, a discharge valve is arranged on the secondary line, and the deck water seal 2 are arranged outside a bulkhead, a branch line is arranged between the secondary line and the air supply valve, an emptying valve is arranged on the branch line, the branch line is arranged on the outer side of the cabin wall, the deck water seal 2 is provided with the branch line, a PV releaser 3 is arranged on the branch line, and a steam inlet and a steam outlet are respectively arranged below the deck water seal 2.
A flowmeter is arranged in the air inlet pipe.
The metal defoaming device 51 in the washing tower 5 is lower than the outlet of the washing tower 5, and a second layer of metal defoaming device 51 is arranged in front of the flue gas outlet, so that impurities and water vapor in the flue gas can be further removed.
The gas supply pipeline is provided with a sampling pipe, the sampling pipe is connected with a monitoring instrument, gas is introduced into the monitoring instrument for analysis, the result is transmitted to the control system, and the control system controls the action of a valve and the like according to a set value.
The system is provided with two centrifugal fans which are used for one purpose and one standby and need to be selectively switched before the system runs.
The lower part of the washing tower 5 is provided with a sump oil cabin and a comprehensive sewage and sump oil treatment unit, the lower part of the deck water seal 2 is provided with a comprehensive sewage and sump oil treatment unit, and the waste liquid achieves near zero emission through the treatment of the unit.
When the inert gas system is the flue gas formula, the boiler flue gas that the inert gas fan 6 was handled the scrubbing tower 5 is sent to the air supply line, and monitoring instrument can on-line monitoring inert gas's oxygen content, monitors through automatic control system, and inert gas is through handling through wet electrostatic precipitator 1, divide into following situation after handling:
1. the flue gas is treated by the wet electrostatic dust collector 1 and is conveyed backwards to reach the near zero emission standard;
2. the unqualified inert gas is treated by the wet electrostatic dust collector 1, so that near zero emission of particles is achieved, and the particles are directly emptied;
3. when the oxygen content in the inert gas is less than 5%, the system closes the emptying valve, opens the gas supply valve, closes the normally open bleeder valve at the front part of the deck water seal 2 to send qualified inert gas to the cabin, samples at the outlet of the washing tower 5 by the oxygen analyzer, detects the oxygen concentration in the inert gas, and controls the work of the system valve according to the detected oxygen concentration so as to ensure that the inert gas supplied to the cabin meets the design requirements.
The invention provides a near-zero emission inert gas system, which adopts a wet electrostatic dust collector 1 as final fine treatment technical equipment of an atmosphere composite pollutant control system, is used for removing dust and gypsum slurry fog drops after wet desulphurization, controlling the emission of PM2.5, solving the problems of smoke emission turbidity and the like, and can control the smoke emission limit value below 5mg/Nm 3;
the PV releaser 3 has the main function of preventing the cabin from being damaged due to overhigh pressure in the cabin or vacuum in the cabin, thereby playing a role in protecting the cabin;
the deck water seal 2 is one of the main devices of the inert gas system, when the oil tanker sails on the sea, the hull inevitably pitches and rolls due to wind and waves, if no reliable non-return device is arranged, the mixed gas (oil gas, inert gas and a small amount of air) in the oil tank can flow back to the mechanical place of the inert gas or other safe places, the deck water seal device has the function of preventing the mixed gas from flowing back, and is arranged at the tail end of the inert gas output main pipeline of the system and is arranged on the deck of the oil tanker.
The above embodiments are only for illustrating the technical solutions of the present invention and are not limited, and other modifications or equivalent substitutions made by the technical solutions of the present invention by the ordinary skilled person in the art are included in the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. A near zero emission inert gas system, characterized by: the device comprises a combustion type and a flue gas type, wherein the combustion type comprises an inert gas generator, a wet electrostatic dust collector, a deck water seal and a PV releaser, the inert gas generator consists of a combustion chamber and a washing tower, and the flue gas type comprises a washing tower, a wet electrostatic dust collector, a deck water seal and a PV releaser;
when the inert gas system is of a combustion type, an air inlet pipe and an oil supply and return pipeline are arranged at the front part of the combustion chamber, an inert gas fan is arranged on the air inlet pipe, a group of seawater cooling and spraying devices are arranged at the central part of the combustion chamber, a group of downward-spraying seawater cooling and spraying devices are arranged in the washing tower, a metal defoaming device is arranged above the seawater cooling and spraying devices in the washing tower, an air supply pipeline is arranged at the outlet of the washing tower, the air supply pipeline is provided with two branch lines, a wet electrostatic dust collector is arranged on one branch line, a deck water seal is arranged on the other branch line, an emptying valve is arranged on the branch line of the wet electrostatic dust collector, an air supply valve is arranged on the branch line of the deck water seal, a secondary line is arranged behind the air supply valve, a discharge valve is arranged on the secondary line, the air supply valve and the discharge valve are separated by a bulkhead, two branch lines are, the PV releaser is arranged on the other branch line, a steam inlet and a steam outlet are respectively arranged below the deck water seal, and a wet electrostatic dust collector is connected to the deck water seal;
when the inert gas system is of a flue gas type, an air inlet pipe is arranged in front of the washing tower, a group of seawater cooling and spraying devices is arranged at an inlet of the washing tower, a metal defoaming device, a seawater cooling and spraying device and a metal defoaming device are sequentially arranged in the washing tower, an air supply pipeline is arranged at an outlet of the washing tower, an inert gas fan is arranged on the air supply pipeline, two branch lines are arranged behind the inert gas fan, a wet electrostatic dust collector is arranged on one branch line, a deck water is arranged on the other branch line in a sealed mode, an emptying valve is arranged on each branch line of the wet electrostatic dust collector, an air supply valve is arranged on each branch line of a deck water seal, a secondary line is arranged behind the air supply valve, a discharge valve is arranged on each secondary line, the air supply valve and the discharge valve are separated by a bulkhead, two branch lines are arranged behind the wet electrostatic dust collector, an emptying valve is arranged on one branch line, a PV release is arranged on the, The steam outlet and the deck water seal are connected with a wet electrostatic dust collector.
2. A near zero emission inert gas system according to claim 1, wherein: when the inert gas system is of a combustion type, an air inlet pipe, an oil supply pipeline and an oil return pipeline are arranged at the front part of the combustion chamber, an inert gas fan is arranged on the air inlet pipe, a group of seawater cooling and spraying devices are arranged at the central part of the combustion chamber, a group of downward-spraying seawater cooling and spraying devices are arranged in the washing tower, a metal defoaming device is arranged above the seawater cooling and spraying devices in the washing tower, an air supply pipeline is arranged at the outlet of the washing tower, the wet electrostatic dust collector is arranged on the air supply pipeline, the deck water seal is arranged on the air supply pipeline behind the wet electrostatic dust collector, an air supply valve and a secondary line are arranged on the air supply pipeline between the deck water seal and the wet electrostatic dust collector, a discharge valve is arranged on the secondary line, the secondary line and the deck water seal are arranged outside the bulkhead, a branch line is arranged between the secondary line and the air supply valve, an emptying valve, the PV releaser is arranged on the branch line, and a steam inlet and a steam outlet are respectively arranged below the deck water seal;
when the inert gas system is of a flue gas type, an air inlet pipe is arranged in front of the washing tower, a group of seawater cooling and spraying devices is arranged at an inlet of the washing tower, a metal defoaming device, a seawater cooling and spraying device and a metal defoaming device are sequentially arranged in the washing tower, an air supply pipeline is arranged at an outlet of the washing tower, an inert gas fan is arranged on the air supply pipeline, a wet electrostatic dust collector is arranged behind the inert gas fan, the wet electrostatic dust collector is arranged on the air supply pipeline, a deck water seal is arranged on the air supply pipeline behind the wet electrostatic dust collector, an air supply valve and a secondary line are arranged on the air supply pipeline between the deck water seal and the wet electrostatic dust collector, a discharge valve is arranged on the secondary line, the secondary line and the deck water seal are arranged on the outer side of the bulkhead, a branch line is arranged between the secondary line and the air supply valve, an evacuation valve is arranged on the branch, the PV releaser is arranged on the branch line, and a steam inlet and a steam outlet are respectively arranged below the deck water seal.
3. A near zero emission inert gas system according to claim 1 or 2, characterized in that:
when the inert gas system is in a flue gas type, the metal defoaming device in the washing tower is lower than the outlet of the washing tower.
4. A near zero emission inert gas system according to claim 1 or 2, characterized in that: the gas supply pipeline is provided with a sampling tube, and the sampling tube is connected with a monitoring instrument.
5. A near zero emission inert gas system according to claim 1 or 2, characterized in that: when the inert gas system is a combustion type, two inert gas fans are arranged and are respectively arranged on the two gas inlet pipes.
6. A near zero emission inert gas system according to claim 1 or 2, characterized in that: when the inert gas system is of a smoke type, two inert gas fans are arranged, the gas supply pipeline is provided with two branch lines, and the inert gas fans are respectively arranged on the two branch lines.
7. A near zero emission inert gas system according to claim 1 or 2, characterized in that: and a sump oil cabin and a sewage and sump oil comprehensive treatment unit are arranged below the washing tower.
8. A near zero emission inert gas system according to claim 1 or 2, characterized in that: and a sewage and sump oil comprehensive treatment unit is arranged below the deck water seal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011371288.5A CN112619341A (en) | 2020-11-30 | 2020-11-30 | Nearly zero release's inert gas system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011371288.5A CN112619341A (en) | 2020-11-30 | 2020-11-30 | Nearly zero release's inert gas system |
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| CN112619341A true CN112619341A (en) | 2021-04-09 |
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| CN202011371288.5A Pending CN112619341A (en) | 2020-11-30 | 2020-11-30 | Nearly zero release's inert gas system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1492400A (en) * | 1975-07-23 | 1977-11-16 | Hughes & Co Ltd F | Inert gas system |
| CN101659316A (en) * | 2009-09-15 | 2010-03-03 | 王德荣 | Marine inert gases system |
| CN207287764U (en) * | 2017-07-12 | 2018-05-01 | 淄博义天热能环保设备有限公司 | A kind of wet electrical dust precipitator system of smoke comprehensive processing |
| CN108187452A (en) * | 2017-11-13 | 2018-06-22 | 武汉船用机械有限责任公司 | A kind of flue gas formula inert gas system suitable for crude oil carrier |
| CN207645810U (en) * | 2017-11-13 | 2018-07-24 | 南通亚泰工程技术有限公司 | For ship and the double fuel combustion-type inert gas system of ocean engineering |
| CN110566970A (en) * | 2019-09-05 | 2019-12-13 | 南通中远海运川崎船舶工程有限公司 | Equipment with functions of generating inert gas and burning garbage |
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2020
- 2020-11-30 CN CN202011371288.5A patent/CN112619341A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1492400A (en) * | 1975-07-23 | 1977-11-16 | Hughes & Co Ltd F | Inert gas system |
| CN101659316A (en) * | 2009-09-15 | 2010-03-03 | 王德荣 | Marine inert gases system |
| CN207287764U (en) * | 2017-07-12 | 2018-05-01 | 淄博义天热能环保设备有限公司 | A kind of wet electrical dust precipitator system of smoke comprehensive processing |
| CN108187452A (en) * | 2017-11-13 | 2018-06-22 | 武汉船用机械有限责任公司 | A kind of flue gas formula inert gas system suitable for crude oil carrier |
| CN207645810U (en) * | 2017-11-13 | 2018-07-24 | 南通亚泰工程技术有限公司 | For ship and the double fuel combustion-type inert gas system of ocean engineering |
| CN110566970A (en) * | 2019-09-05 | 2019-12-13 | 南通中远海运川崎船舶工程有限公司 | Equipment with functions of generating inert gas and burning garbage |
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Application publication date: 20210409 |