Exhaust gas scrubbing system with cooling sea water pump as exhaust gas scrubbing dilution pump

Abstract

The application provides a kind of exhaust gas washing system of cooling seawater pump as exhaust gas washing dilution pump, including seawater tank, desulfurization tower washing seawater pump, washing tower, cooling seawater pump, central cooler, branch pipe, first valve and second valve;Desulfurization tower washing seawater pump is installed on the pipeline between seawater tank and washing tower, the drain of washing tower is connected with washing water discharge pipeline, and the washing water discharge pipeline is communicated with outside of ship;Cooling seawater pump is installed on the pipeline between central cooler and seawater tank;The drain of central cooler is connected with discharge outside of ship pipeline, and the discharge outside of ship pipeline is communicated with outside of ship;Branch pipe is connected between discharge outside of ship pipeline and washing water discharge pipeline;Branch pipe is provided with first valve;Second valve is arranged at one end of discharge outside of ship pipeline adjacent to outside of ship.A kind of exhaust gas washing system of cooling seawater pump as exhaust gas washing dilution pump of the application cancels the setting of washing tower dilution seawater pump, and can also meet the washing water discharge requirement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste gas washing system, and particularly relates to a waste gas washing system with a cooling seawater pump serving as a waste gas washing dilution pump. BACKGROUND

[0002] When a ship uses fuel oil with high sulfur content, in order to meet the control requirements of sulfur oxides in engine exhaust gas, the ship needs to be equipped with an engine exhaust gas washing system. The core component of the exhaust gas washing system is the washing tower. The working principle is that the washing tower washing seawater pump lifts the alkaline seawater into the washing tower, the seawater is atomized by the nozzle in the washing tower, and the acid engine exhaust gas flowing through the washing tower is chemically reacted, so as to reduce the content of sulfur oxides in the engine exhaust gas after reaction, and meet the emission requirements. The washing water after reaction with the exhaust gas flows to the sea through the pipeline from the bottom of the washing tower by gravity.

[0003] In order to control the turbidity and other technical indicators of the washing water discharged from the washing tower, a washing tower dilution seawater pump is often arranged in the system. The washing tower dilution seawater pump injects seawater into the washing water discharge pipeline of the washing tower, and the dilution water and the washing tower discharge water are discharged into the sea together.

[0004] The seawater cooling system of the ship is provided with a cooling seawater pump and a central cooler. The cooling seawater pump sucks seawater from a seawater tank and discharges it to the sea after passing through the central cooler.

[0005] When the washing tower dilution seawater pump is running, a large amount of electric energy is consumed, and the configuration of the dilution seawater pump increases the shipbuilding procurement cost and also increases the operation and management work of the crew for the washing tower dilution seawater pump. When the dilution pump is not working, the washing water discharged from the washing tower is more acidic, which has a greater corrosion on the discharge pipeline and the outer plate of the ship. SUMMARY

[0006] In view of the above deficiencies in the prior art, the present application provides a waste gas washing system with a cooling seawater pump serving as a waste gas washing dilution pump, which cancels the setting of the washing tower dilution seawater pump and can also meet the washing water discharge requirements.

[0007] In order to achieve the above object, the present application provides a waste gas washing system with cooling seawater pumps serving as waste gas washing dilution pumps, comprising a plurality of seawater tanks, a plurality of desulfurization tower washing seawater pumps, a washing tower, a plurality of cooling seawater pumps, a central cooler, a branch pipe, a first valve and a second valve; the desulfurization tower washing seawater pumps are installed on the pipeline between the seawater tanks and the water inlet of the washing tower, the water outlet of the washing tower is connected with a washing water discharge pipeline, the washing water discharge pipeline is communicated with the outside of the ship; the cooling seawater pumps are installed on the pipeline between the water inlet of the central cooler and the seawater tanks; the water outlet of the central cooler is connected with a discharge outboard pipeline, the discharge outboard pipeline is communicated with the outside of the ship; the branch pipe is connected between the discharge outboard pipeline and the washing water discharge pipeline; the branch pipe is provided with the first valve; the second valve is arranged at one end of the discharge outboard pipeline adjacent to the outside of the ship.

[0008] Preferably, two desulfurization tower washing seawater pumps are included, which are arranged in parallel between the seawater tanks and the water inlet of the washing tower.

[0009] Preferably, two cooling seawater pumps are included, which are arranged in parallel between the seawater tanks and the water inlet of the central cooler.

[0010] Preferably, two central coolers are included.

[0011] The present application has the following beneficial effects due to the adoption of the above technical scheme:

[0012] 1. By arranging the branch pipe, the existing and continuously running seawater cooling pump on the ship can serve as the dilution pump for the washing water of the washing tower, and an independent washing tower dilution seawater pump can be omitted.

[0013] 2. The ship procurement cost caused by the washing tower dilution seawater pump is eliminated.

[0014] 3. The maintenance work of the crew caused by the washing tower dilution seawater pump is reduced.

[0015] 4. The electric energy consumption caused by the operation of the washing tower dilution seawater pump is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a structural schematic view of the waste gas washing system with cooling seawater pumps serving as waste gas washing dilution pumps according to the embodiment of the present application. DETAILED DESCRIPTION

[0017] The preferred embodiment of the present application is described below according to the accompanying drawings Figure 1 , and is described in detail, so that the function and characteristics of the present application can be better understood.

[0018] Please refer toFigure 1 The exhaust gas washing system of the cooling seawater pump serving as the exhaust gas washing dilution pump according to the embodiment of the present application comprises a plurality of seawater tanks 1, a plurality of desulfurization tower washing seawater pumps 2, a washing tower 3, a plurality of cooling seawater pumps 4, a plurality of central coolers 5, a branch pipe 6, a first valve 7 and a second valve 8. The desulfurization tower washing seawater pump 2 is installed on the pipeline between the seawater tank 1 and the water inlet of the washing tower 3. The water outlet of the washing tower 3 is connected to a washing water discharge pipeline 10 which is communicated with the outside of the ship. The cooling seawater pump 4 is installed on the pipeline between the water inlet of the central cooler 5 and the seawater tank 1. The water outlet of the central cooler 5 is connected to a discharge outboard pipeline 9 which is communicated with the outside of the ship. The branch pipe 6 is connected between the discharge outboard pipeline 9 and the washing water discharge pipeline 10. The branch pipe 6 is provided with the first valve 7. The second valve 8 is arranged at the end of the discharge outboard pipeline 9 adjacent to the outside of the ship.

[0019] In the embodiment, two desulfurization tower washing seawater pumps 2 are included, and the desulfurization tower washing seawater pumps 2 are arranged in parallel between the seawater tank 1 and the water inlet of the washing tower 3.

[0020] Two cooling seawater pumps 4 are included, and the cooling seawater pumps 4 are arranged in parallel between the seawater tank 1 and the water inlet of the central cooler 5.

[0021] Two central coolers 5 are included.

[0022] When the washing tower 3 needs to work with dilution water, the first valve 7 is opened and the second valve 8 is closed in the exhaust gas washing system of the cooling seawater pump serving as the exhaust gas washing dilution pump according to the embodiment of the present application. In the cooling seawater system, the cooling seawater flows to the washing water discharge pipeline 10 after passing through the central cooler 5 and the first valve 7, and dilutes the washing water discharged by the washing tower 3.

[0023] The exhaust gas washing system of the cooling seawater pump serving as the exhaust gas washing dilution pump according to the embodiment of the present application cancels the setting of the conventional washing tower 3 dilution seawater pump, and also meets the washing water discharge requirement. The present application uses the existing cooling seawater pump 4 on the ship as the washing tower 3 dilution seawater pump, and uses the cooling seawater pump 4 to dilute the washing tower 3 discharge water through the setting of the branch pipe 6 and the first valve 7, so as to meet the washing water discharge requirement. The dilution water provided by the cooling seawater pump 4 greatly reduces the acidity of the washing water discharged by the washing tower 3, and reduces the corrosion of the washing water to the discharge pipeline and the ship outer plate.

[0024] The above embodiment of the present application is described in detail in combination with the drawings, and those skilled in the art can make various changes to the present application according to the above description. Therefore, some details in the embodiment should not constitute a limitation on the present application, and the protection scope of the present application will be defined by the appended claims.

Claims

1. An exhaust gas scrubbing system in which a seawater pump is used as a dilution pump for exhaust gas scrubbing, characterized by The application relates to a seawater desulfurization and cooling system, which comprises a plurality of seawater tanks (1), a plurality of seawater desulfurization tower washing pumps (2), a washing tower (3), a plurality of cooling seawater pumps (4), a plurality of central coolers (5), a branch pipe (6), a first valve (7) and a second valve (8); the seawater desulfurization tower washing pumps (2) are installed on pipelines between the seawater tanks (1) and water inlets of the washing tower (3); a washing water discharge pipeline (10) is connected to a water outlet of the washing tower (3) and communicates with the outside of a ship; the cooling seawater pumps (4) are installed on pipelines between water inlets of the central coolers (5) and the seawater tanks (1); a discharge outboard pipeline (9) is connected to water outlets of the central coolers (5) and communicates with the outside of the ship; the branch pipe (6) is connected between the discharge outboard pipeline (9) and the washing water discharge pipeline (10); the first valve (7) is arranged on the branch pipe (6); and the second valve (8) is arranged on an end of the discharge outboard pipeline (9) adjacent to the outside of the ship. The seawater desulfurization tower washing pumps (2) are arranged in parallel between the seawater tanks (1) and water inlets of the washing tower (3). The cooling seawater pumps (4) are arranged in parallel between the seawater tanks (1) and water inlets of the central coolers (5).

2. The exhaust gas scrubbing system according to claim 1, wherein The central coolers (5) are arranged in parallel.

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