TWM665165U - A multifunctional and environmentally friendly ship-specific desulfurization system and its device - Google Patents

Abstract

A ship-specific desulfurization system and device with multiple functions and substantial environmental benefits is mainly used to adopt a closed-loop desulfurization circulation system to desulfurize sulfur oxides and nitrogen oxides in exhaust gas and purify the exhaust gas through a neutralizer, so that the generated exhaust gas meets the provisions of the pollution prevention convention. In addition, the oxidation zone for collecting residues is added with lime to react to form calcium sulfate, and the reactants such as calcium sulfate are separated by dehydration through a centrifuge. The neutralizer after separation can be reduced to desulfurization treatment again. The process will not discharge wastewater into the ocean and will not cause water pollution.

Description

A multifunctional and environmentally friendly ship-specific desulfurization system and its device

This new technology relates to the field of exhaust gas desulfurization technology, and particularly refers to a ship-specific desulfurization system and device that has both multi-functional and substantial environmental benefits.

The desulfurization tower installed on the ship is used to remove particulate matter and harmful components such as sulfur oxides (SOx) or nitrogen oxides (NOx) from the exhaust gas produced by the combustion process of the marine fuel engine, and pollution control has been implemented. At present, the desulfurization tower of the ship has been used to treat the exhaust gas of the above-mentioned diesel engines, auxiliary diesel engines and boilers, and it was implemented on January 1, 2020 in accordance with the content of the pollution prevention convention (MARPOL).

The most common desulfurization technology is to introduce seawater to wash away sulfides. However, the acidic seawater after the reaction is directly discharged into the sea, which in turn causes ocean water pollution problems.

How to solve the above problems is a topic that relevant industries are actively working to solve.

The present invention provides a ship-specific desulfurization system and device with multiple functions and substantial environmental benefits. The main purpose is to adopt a closed-loop desulfurization circulation system, desulfurize sulfur oxides and nitrogen oxides in exhaust gas through a neutralizer and purify the exhaust gas, so that the generated exhaust gas meets the provisions of the pollution prevention convention. In addition, the oxidation zone for collecting residues is added with lime to react to form calcium sulfate, and the reactants such as calcium sulfate are separated by dehydration through a centrifuge. The neutralizer after separation can be reduced to desulfurization treatment again. The process will not discharge wastewater into the ocean and will not cause water pollution.

The present invention provides a ship-specific desulfurization system and device with multiple functions and substantial environmental benefits. The neutralizer is first passed through a jet oscillator to reduce the particle size of the neutralizer, and then a multi-layer spray device is used to spray it in the purification space of the desulfurization tower. Since the particle size of the neutralizer is reduced and the atomization can contact the exhaust gas in a larger range, the sulfur oxides and nitrogen oxides in the exhaust gas are removed, the desulfurization reaction time is accelerated, and the efficiency is improved.

The novel structure is installed on a ship and comprises:

A purification tower, the purification tower has an air inlet pipe, the air inlet pipe is connected to a diesel engine or a boiler, the exhaust gas generated by the diesel engine or boiler combustion is pressurized by a turbine, and then the exhaust gas oxygen is guided into the purification tower;

The purification tower comprises, from top to bottom, a mesh type mist eliminator, at least one multi-layer spray device, a jet oscillator, an oxidation zone and an absorption zone, which form a gas-liquid mixing zone for desulfurization;

The jet oscillator is arranged in the absorption zone of the purification tower. The pH value (acid-base value, hereinafter referred to as pH value) of the neutralizer in the absorption zone is between 5.1 and 6.3. The jet oscillator reduces the particle size of the neutralizer stored in the absorption zone through oscillation treatment. At the same time, the neutralizer circulates in the absorption zone under the jet of the jet oscillator. In addition, a plurality of pressure pumps are arranged at the bottom of the purification tower. The pressure pumps introduce the sucked neutralizer into the multi-layer spray devices.

The multi-layer spraying devices are installed in the central area of the purification tower. The multi-layer spraying devices are provided with a plurality of atomizing nozzles. The atomizing nozzles spray the neutralizing agent in the gas-liquid mixing zone to make the neutralizing agent react with the introduced exhaust gas to produce a desulfurization reaction. The desulfurized gas rises to one side of the mesh type demisting device, and the liquid after the desulfurization reaction sinks to the oxidation zone.

The oxidation zone is connected to an alkaline liquid injection pipe. The pH value of the liquid collected in the oxidation zone is between 4.9 and 5.5. The liquid contains sulfur oxides or nitrogen oxides. Alkaline agent is injected through the alkaline liquid injection pipe to react to form calcium sulfate (Ca ₂ SO ₄ ) and the calcium sulfate is collected by centrifugation through a centrifuge. The neutralizer with a higher pH value flows to the absorption zone, so that the neutralizer achieves a closed loop circulation;

The mesh demister then captures larger particles in the gas, and the desulfurized gas is discharged from the exhaust pipe at the top of the purification tower.

In the embodiment of the present invention, a funnel-shaped air collecting ring is provided at the lower end of the multi-layer spraying device, and the air collecting rings collect the exhaust gas in the center of the purification tower and raise it upward. Pressurized air channels are provided around the air collecting rings to allow the exhaust gas to circulate in the gas-liquid mixing zone, further increasing the contact with the atomizing neutralizer to achieve the purpose of desulfurization.

In the embodiment of the present invention, a gas sensor is provided between the purification tower and the mesh type mist eliminator.

Through the above description, the features and effects of this new type are briefly described as follows:

1. This new type adopts closed loop circulation for desulfurization treatment, and the process will not produce acidic wastewater, avoiding discharge into the ocean and causing water pollution.

2. The new neutralizer is firstly passed through a jet oscillator to reduce the particle size of the neutralizer, and then sprayed into the purification space of the desulfurization tower using a multi-layer spray device. As the particle size of the neutralizer becomes smaller and the atomization can contact the exhaust gas in a larger range, the sulfur oxides and nitrogen oxides in the exhaust gas are removed, the desulfurization reaction time is accelerated, and the efficiency is improved.

3. Further, a gas collecting ring is installed on the multi-layer spray device to concentrate the exhaust gas. A pressurized air channel is set around the gas collecting ring to make the exhaust gas circulate in the gas-liquid mixing area, further increasing the contact with the atomizing neutralizer to achieve the purpose of desulfurization.

As shown in FIG1 , the new multifunctional and environmentally friendly ship-specific desulfurization system and its device are installed on a ship and include: a purification tower 10 having an air intake pipe 11, the air intake pipe 11 being connected to a diesel engine 20 or a boiler (not shown). The exhaust gas generated by the combustion of the diesel engine 20 or the boiler is pressurized by a turbine 12, and then the exhaust gas oxygen is guided to the interior of the purification tower 10.

Please continue to refer to FIG. 1 . The purification tower 10 includes, from top to bottom, a mesh-type mist eliminator 1, a multi-layer spray device 2, a jet oscillator 3, an oxidation zone 4 and an absorption zone 5, which form a gas-liquid mixing zone for desulfurization.

As shown in FIG. 2 , the jet oscillator 3 is disposed in the absorption zone 5 of the purification tower 10. The pH value of the neutralizer in the absorption zone 5 is between 5.1 and 6.3 (alkaline). The jet oscillator 3 reduces the particle size of the neutralizer W stored in the absorption zone 5 through oscillation treatment. At the same time, the neutralizer W circulates in the absorption zone 5 under the jet of the jet oscillator 3. In addition, a plurality of booster pumps 30 are externally connected to the bottom of the purification tower 10. The booster pumps 30 introduce the sucked neutralizer W into the multi-layer spray devices 2.

As shown in FIG. 1 , FIG. 3 , and FIG. 4 , the multi-layer spray device 2 is installed in the central area inside the purification tower 10. The multi-layer spray device 2 is provided with a plurality of atomizing nozzles 21. The atomizing nozzles 21 spray the neutralizer W in a mist form in the gas-liquid mixing zone space, so that the neutralizer W reacts with the introduced exhaust gas to produce a desulfurization reaction. The desulfurized gas rises to one side of the mesh type demisting device 1, and the liquid after the desulfurization reaction sinks to the oxidation zone 4.

Please continue to refer to Figures 3 and 4. A funnel-shaped air collecting ring 22 is provided at the lower end of the multi-layer spray device 2. The air collecting rings 22 collect the exhaust gas in the center of the purification tower 10 and raise it upward. A pressurized air channel 23 is provided around the air collecting rings 22, so that the exhaust gas circulates in the gas-liquid mixing zone, further increasing the contact with the atomized neutralizer W, thereby achieving the purpose of desulfurization.

As shown in FIG5 , the oxidation zone 4 is connected to an alkaline liquid injection pipe 41. The pH value of the liquid collected in the oxidation zone 4 is between 4.9 and 5.5, and the aforementioned liquid contains sulfur oxides or nitrogen oxides (the liquid in this state is acidic). Alkaline agent is injected through the alkaline liquid injection pipe 41 to react to form calcium sulfate (gypsum, Ca ₂ SO ₄ ) and the calcium sulfate is collected by centrifugation through a centrifuge 42, while the neutralizer W with a higher pH value flows to the absorption zone 5, so that the neutralizer W achieves a closed loop circulation.

As shown in FIG6 , the mesh demister 1 captures the larger particles in the gas, and the desulfurized gas is discharged from the exhaust pipe 13 at the top of the purification tower 10. A gas sensor 14 is provided between the purification tower 10 and the mesh demister 1. The gas sensor 14 meets the requirements of the pollution prevention convention based on the carbon-sulfur ratio of the purified gas being less than 21.7.

In actual use, the exhaust gas generated by the diesel engine 20 or the boiler enters the gas-liquid mixing zone of the purification tower 10 through the intake pipe 11; the jet oscillator 3 circulates the neutralizer W in the absorption zone 5, so that the particle size of the neutralizer W becomes smaller, and then it is sucked to the multi-layer spray device 2 at the upper end by the external pressure pump 30; from the figure, it can be understood that the multi-layer spray device 2 sprays the neutralizer W in atomized form through the atomizing nozzle 21, and at the same time cooperates with the air collecting ring 22 and the pressure pump 30 to spray the neutralizer W in atomized form. The air passage 23 makes the waste gas circulate in the gas-liquid mixing zone in a flocculent state, increasing the contact with the atomized neutralizer W, thereby achieving the purpose of desulfurization. The desulfurized gas flows to the top of the purification tower 10, and the neutralizer W with sulfur oxide and nitrogen oxide particles after the reaction falls into the oxidation zone 4, and an alkaline liquid (such as lime) is injected through the alkaline liquid injection pipe 41. The alkaline agent injected through the alkaline liquid injection pipe 41 reacts to form calcium sulfate (gypsum, Ca ₂ SO ₄ ) and collects the calcium sulfate by centrifugation through a centrifugal device 42, while the neutralizer W with a higher pH value flows to the absorption zone 5, so that the neutralizer W achieves a closed loop circulation, so no waste water is generated during the desulfurization process, and there is no need to discharge the waste water into the ocean; the mesh type mist eliminator 1 captures the larger particles in the gas, and the desulfurized gas is discharged from the exhaust pipe 13 at the top of the purification tower 10, and the carbon-sulfur ratio of the discharged gas is less than 21.7, which meets the provisions of the pollution prevention convention.

In addition, the novel structure reduces the structural volume, and the overall volume is only 1/8 of the existing desulfurizer, which is easier to install or modify on a ship.

In summary, this new structure has never been seen in any books or periodicals or used publicly, and it truly meets the requirements for applying for a new patent. We sincerely request the Bureau to examine it and approve the patent as soon as possible. We would be very grateful.

It should be noted that the above are specific embodiments of the present invention and the technical principles used. If the changes made according to the concept of the present invention still do not exceed the spirit covered by the instructions and drawings, they should be stated within the scope of the present invention.

10: Purification tower 11: Intake pipe 12: Turbine 13: Exhaust pipe 14: Gas sensor 20: Diesel engine 30: Pressure pump 1: Mesh type mist eliminator 2: Multi-layer spray device 21: Atomizing nozzle 22: Air collecting ring 23: Pressurized air channel 3: Jet oscillator 4: Oxidation zone 41: Alkaline liquid injection pipe 42: Centrifugal equipment 5: Absorption zone W: Neutralizer

Figure 1: System diagram of the new type. Figure 2: Schematic diagram of the use of the absorption zone. Figure 3: Structural diagram of the multi-layer spray device Figure 4: Schematic diagram of the use of the multi-layer spray device. Figure 5: Schematic diagram of the circulation of the oxidation zone. Figure 6: Schematic diagram of the use of the mesh type mist eliminator.

10: Purification tower

11: Intake pipe

12: Turbine

13: Exhaust pipe

14: Gas sensor

20: Diesel engine

30: Pressure pump

1: Mesh type mist eliminator

2: Multi-layer spraying device

21: Atomizing nozzle

22: Gas Ring

23: Pressurized air channel

3: Jet Oscillator

4: Oxidation zone

41: Alkaline liquid injection tube

42: Centrifugal equipment

5: Absorption zone

Claims (3)

A ship-specific desulfurization system and device with multiple functions and substantial environmental benefits is installed on a ship and includes: A purification tower, the purification tower has an air inlet pipe, the aforementioned air inlet pipe is connected to a diesel engine or a boiler, the exhaust gas generated by the combustion of the aforementioned diesel engine or boiler is pressurized by a turbine, and the exhaust gas oxygen is guided to the inside of the purification tower; The purification tower includes a mesh demister, at least one multi-layer spray device, a jet oscillator, an oxidation zone and an absorption zone from top to bottom to form a gas-liquid mixing zone for desulfurization; The jet oscillator is installed in the absorption zone of the purification tower. The pH value (acid-base value, hereinafter referred to as pH value) of the neutralizer in the absorption zone is between 5.1-6.3. The jet oscillator reduces the particle size of the neutralizer stored in the absorption zone through oscillation treatment. At the same time, the neutralizer circulates in the absorption zone under the jet of the jet oscillator. In addition, there are multiple sets of booster pumps at the bottom of the purification tower. The booster pumps introduce the sucked neutralizer into the multi-layer spray devices. The multi-layer spraying devices are installed in the central area inside the purification tower. The multi-layer spraying devices are provided with multiple atomizing nozzles. The atomizing nozzles spray the neutralizer in the gas-liquid mixing zone to make the neutralizer react with the introduced exhaust gas to produce a desulfurization reaction. The desulfurized gas rises to one side of the mesh demister, while the liquid after the desulfurization reaction sinks to the oxidation zone; The oxidation zone is connected to an alkaline liquid injection pipe. The pH value of the neutralizer collected in the oxidation zone is between 4.9 and 5.5. The aforementioned liquid contains sulfur oxides or nitrogen oxides. The alkaline agent is injected through the alkaline liquid injection pipe to react to form calcium sulfate (Ca2SO4) and the calcium sulfate is centrifuged and collected through a centrifugal device. The neutralizer with a higher pH value flows to the absorption zone, so that the neutralizer achieves a closed loop circulation; The mesh demister then captures larger particles in the gas, and the desulfurized gas is discharged from the exhaust pipe at the top of the purification tower. As described in claim 1, a ship-specific desulfurization system and device having multiple functions and substantial environmental benefits is provided, wherein a funnel-shaped air collecting ring is provided at the lower end of the multi-layer spraying device, and the air collecting rings collect the exhaust gas in the center of the purification tower and raise it upward, and pressurized air channels are provided around the air collecting rings, so that the exhaust gas circulates in the gas-liquid mixing zone, further increasing the contact with the atomizing neutralizer, thereby achieving the purpose of desulfurization. As described in claim 1, a ship-specific desulfurization system and its device having multiple functions and substantial environmental benefits, wherein a gas sensor is provided between the purification tower and the mesh type demisting device.

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