Novel ship engine room bottom water treatment system

Abstract

The invention discloses a novel ship cabin bottom water treatment system, and relates to the technical field of ship water treatment, the novel ship cabin bottom water treatment system comprises a drainage cabin and a cabin bottom water cabin, waste gas system circulating water enters the drainage cabin, and a water outlet of the drainage cabin, closed desulfurization tower circulating water and a water outlet of the cabin bottom water cabin are all communicated with a purification unit pump; a water outlet of the purification unit pump is respectively communicated with the purification unit and the bilge water pre-separation cabin through valves, an oil separation port of the bilge water pre-separation cabin is communicated with the waste oil collection cabin, a residual mixture separation port is communicated with the bilge water cabin, and a water outlet of the purification unit is connected with the water analyzer. The residue discharging port is connected to the waste oil collecting cabin and the residue cabin through valves, and the water analyzer controls the waste oil to be discharged out of the ship according to the detection result and is communicated with the water discharging cabin and the cabin bottom water cabin. A bilge water treatment system, an EGR water treatment system and a closed desulfurization tower water treatment system can be shared, the problem of insufficient cabin space can be solved, and the effect of saving cost is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of ship water treatment, and particularly to a novel ship engine room bilge water treatment system. Background Art

[0002] Ocean shipping is the most important means of world transportation. During the navigation of a ship, various engine room equipment, pipelines or daily maintenance work may cause leakage of water and oil, which will accumulate at the bottom of the engine room to form bilge water. The bilge water in the engine room contains various chemical substances, oil stains, etc., which will cause corrosion to the equipment, pipelines and hull in the engine room; it will make the mechanical and electrical equipment damp or damaged, affecting the normal operation of the equipment; when the bilge water is too much, it will affect the buoyancy and stability of the ship. Therefore, a bilge water treatment system is needed so that the ship can appropriately treat and discharge the bilge water during navigation.

[0003] At the same time, with the increasingly serious global environmental problems, the pollution of sulfur oxides and nitrogen oxides in ship exhaust gases to the environment has been gradually taken seriously. Therefore, the International Maritime Organization (IMO) has issued relevant policies to reduce the emissions of sulfur oxides and nitrogen oxides. In order to meet the requirements of the nitrogen oxide emission regulations, an exhaust gas recirculation system (EGR) may be installed on the ship. The principle of the exhaust gas recirculation system is that when the main engine is running, part of the exhaust gas is extracted for washing and purification treatment, and then recycled to the scavenging manifold. During the exhaust gas purification process, the excess water will be sent to the EGR drain water tank. In order to ensure that the drain water meets the requirements for discharging outside the ship, a water treatment system needs to be equipped. In order to meet the requirements of the sulfur oxide emission regulations, and more and more countries do not allow the discharge of the washing water of the desulfurization tower (EGCS), a closed desulfurization tower may be installed on the ship. Since particulate matter and other impurities will gradually accumulate in the washing circulating water, in order to ensure the washing effect, the washing circulating water needs to be sent to the water treatment system for purification.

[0004] However, if both EGR and a closed desulfurization tower are installed on the ship, a set of water treatment system is required for each. There may not be enough space in the engine room to arrange the relevant equipment, and the cost is high. Summary of the Invention

[0005] The purpose of the present invention is to provide a novel ship engine room bilge water treatment system, which can share the bilge water treatment system, the EGR water treatment system and the closed desulfurization tower water treatment system, so that the bilge water treatment system can have the function of simultaneously treating the EGR circulating water and the closed desulfurization tower circulating water, which can not only solve the problem of insufficient engine room space, but also greatly save costs.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions:

[0007] A novel ship engine room bilge water treatment system includes a drain water tank and a bilge water tank. The circulating water of the exhaust gas system enters the drain water tank. The water outlet of the drain water tank, the circulating water of the closed desulfurization tower, and the water outlet of the bilge water tank are all connected to the purification unit pump. The water outlet of the purification unit pump is respectively connected to the purification unit and the bilge water pre-separation tank through valves.

[0008] The oil separation outlet of the bilge water pre-separation tank is connected to the waste oil collection tank, and the remaining mixture separation outlet is connected to the bilge water tank. The drain outlet of the purification unit is connected to the water analyzer, and the slag discharge outlet is respectively connected to the waste oil collection tank and the residue tank through valves. The water analyzer controls the discharge out of the ship, the introduction into the drain water tank, and the introduction into the bilge water tank according to the detection results.

[0009] Furthermore, the water outlet of the drain water tank, the circulating water of the closed desulfurization tower, and the water outlet of the bilge water tank are selected to enter the purification unit pump through two three-way valves. The water analyzer controls the discharge out of the ship, the introduction into the drain water tank, and the introduction into the bilge water tank through the two three-way valves.

[0010] Furthermore, after the engine room bilge water in the bilge water tank is cleaned by the purification unit, the generated residue is sent to the waste oil collection tank.

[0011] Furthermore, after the circulating water of the exhaust gas system and the circulating water of the closed desulfurization tower are cleaned by the purification unit, the generated residue is sent to the residue tank.

[0012] Furthermore, after the engine room bilge water in the bilge water tank is treated by the purification unit, it is analyzed by the water analyzer. If the analysis is qualified, it is discharged out of the ship; otherwise, it is sent back to the bilge water tank.

[0013] Furthermore, after the circulating water of the exhaust gas system and the circulating water of the closed desulfurization tower are treated by the purification unit, they are analyzed by the water analyzer. If the analysis is qualified and the area where the ship is located allows discharge, they are discharged out of the ship; otherwise, they are sent back to the drain water tank.

[0014] Furthermore, the water qualified after being analyzed by the water analyzer is discharged out of the ship through the discharge pipeline. A check valve and a stop valve are provided on the discharge pipeline.

[0015] Furthermore, the residue in the waste oil collection tank is pumped to the waste oil sedimentation tank or to the ship shore by the bilge water residue pump.

[0016] Furthermore, a heating device is provided in the waste oil sedimentation tank to evaporate the water in the waste oil, and the sludge is sent to the incinerator for incineration and / or enters the waste oil collection tank by gravity.

[0017] Furthermore, the sludge in the residue tank is pumped to the ship shore by the residue pump.

[0018] In summary, the present invention has the following beneficial effects:

[0019] The bilge water treatment system can have the function of simultaneously treating EGR recycled water and closed desulfurization tower recycled water, and can timely treat the engine room bilge water, EGR recycled water or closed desulfurization tower recycled water as needed, and timely monitor the quality of the discharged water after treatment to ensure the normal operation of the ship. It can simultaneously treat EGR recycled water and closed desulfurization tower recycled water, which can not only save the layout space of the engine room, but also greatly reduce the cost of installing the water treatment system on the ship. Brief Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the overall structure of a new type of ship engine room bilge water treatment system of the present invention.

[0021] In the figure, 1 is the discharged water tank; 11 is the second three-way valve; 2 is the bilge water tank; 21 is the first three-way valve; 3 is the purification unit pump; 31 is the second stop valve; 32 is the first check valve; 4 is the purification unit; 41 is the third three-way valve; 42 is the second check valve; 43 is the third check valve; 5 is the bilge water pre-separation tank; 51 is the first stop valve; 6 is the water analyzer; 61 is the fourth three-way valve; 62 is the fifth three-way valve; 63 is the ninth check valve; 64 is the fourth stop valve; 7 is the waste oil collection tank; 71 is the fifth check valve; 72 is the bilge water residue pump; 73 is the seventh check valve; 74 is the third stop valve; 8 is the residue tank; 81 is the sixth check valve; 82 is the EGR & EGCS residue pump; 83 is the eighth check valve; 9 is the waste oil sedimentation tank; 91 is the fourth check valve. Detailed Embodiments

[0022] The following further describes the detailed embodiments of the present invention with reference to the drawings. This embodiment does not limit the present invention. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of this application.

[0023] A new type of ship engine room bilge water treatment system, as Figure 1 shown, includes a discharged water tank 1 (EGR & EGCS discharged water tank 1) and a bilge water tank 2. The discharge port of the exhaust gas system (EGR) recycled water is connected to the discharged water tank 1 and discharged into it. The water outlet of the discharged water tank 1, the discharge port of the closed desulfurization tower recycled water and the water outlet of the bilge water tank 2 are all connected to the purification unit pump 3. The water outlet of the purification unit pump 3 is respectively connected to the purification unit 4 and the bilge water pre-separation tank 5 through valves.

[0024] Among them, the drain water tank 1 (EGR & EGCS drain water tank 1) is used to collect the excess water during the circulation of the exhaust gas recirculation system (hereinafter referred to as EGR circulating water), the drain water after purification of the EGR circulating water, and the drain water after purification of the closed desulfurization tower circulating water; this drain water may contain sulfuric acid or NaOH, and the material of the cabin of the drain water tank 1 is selected as stainless steel or carbon steel with an anti-corrosion coating.

[0025] As Figure 1 shown, specifically, the water outlet of the drain water tank 1, the discharge port of the closed desulfurization tower circulating water, and the water outlet of the bilge water tank 2 are selected to enter the purification unit pump 3 through two three-way valves, which is used to control a certain path of the engine room bilge water, EGR circulating water, and closed desulfurization tower circulating water to enter the purification unit 4 for treatment;

[0026] In this embodiment, the water inlet of the drain water tank 1 is connected to the EGR circulating water, the water outlet is connected to the second three-way valve 11, the other water inlet of the second three-way valve 11 is connected to the closed desulfurization tower circulating water, the water outlets of the second three-way valve 11 and the bilge water tank 2 are respectively connected to the first three-way valve 21, and the water outlet of the first three-way valve 21 is connected to the purification unit pump 3.

[0027] As Figure 1 shown, regulations and other provisions do not allow the residues generated by the EGR system and the desulfurization tower system to be mixed with the residues generated by the engine room bilge water system. Therefore, the residues generated after cleaning the engine room bilge water are sent to the waste oil collection tank 7, and the residues generated after cleaning the EGR circulating water and the closed desulfurization tower circulating water are sent to the EGR & EGCS residue tank 8;

[0028] In this embodiment, the oil separation port of the bilge water pre-separation tank 5 is connected to the waste oil collection tank 7, the remaining mixture separation port is connected to the bilge water tank 2, the drain port of the purification unit 4 is connected to the water analyzer 6, and the slag discharge port is respectively connected to the waste oil collection tank 7 and the residue tank 8 through valves. The water analyzer 6 controls the discharge of water out of the ship, the introduction into the drain water tank 1, and the introduction into the bilge water tank 2 according to the detection results; the water analyzer 6 can control the discharge of water out of the ship, the introduction into the drain water tank 1, and the introduction into the bilge water tank 2 through two three-way valves, and the corresponding pipelines of the rest can also be controlled to be opened and closed through the corresponding valves.

[0029] The bilge water tank 2 is used to collect the engine room bilge water. The engine room bilge water is sent to the bilge water pre-separation tank 5 for pretreatment through the purification unit pump 3, and the water and oil in the engine room bilge water can be pre-separated. The separated oil is on the top layer and flows to the waste oil collection tank 7 through the pipeline, and the remaining oil-water mixture is discharged to the bilge water tank 2. This can greatly reduce the load of the purification unit 4, increase its service life, and reduce the maintenance cost;

[0030] Among them, the pre-separated engine room bilge water, EGR recirculating water, and closed desulfurization tower circulating water can be sent to the purification unit 4 for treatment by the purification unit pump 3. The EGR and the blowdown water from the closed desulfurization tower may contain sulfuric acid or NaOH. In this embodiment, the type of the purification unit pump 3 can be a centrifugal pump or a reciprocating pump, and the material can be selected from stainless steel or materials resistant to acid or alkali. The purification unit 4 can be a centrifugal or membrane separator, which can separate water and sludge in the bilge water, EGR recirculating water, and closed desulfurization tower circulating water. The EGR recirculating water and the closed desulfurization tower circulating water may contain sulfuric acid or NaOH, and the materials of the components in contact with the above liquids can be selected from stainless steel or materials resistant to acid or alkali. For example, the residues after the treatment of the EGR recirculating water and the closed desulfurization tower circulating water may contain sulfuric acid or NaOH, and the EGR & EGCS residue tank 8 can be made of stainless steel or carbon steel with an anti-corrosion coating in terms of material selection.

[0031] As Figure 1 shown, a water analyzer 6 is provided in the blowdown water pipeline after being treated by the purification unit 4 to monitor the quality of the blowdown water. The water analyzer 6 is equipped with oil content, pH, polycyclic aromatic hydrocarbons (PAH), and turbidity alarms. In this embodiment, the alarm value of the oil content alarm is set to 15 ppm, and the alarm values of pH, polycyclic aromatic hydrocarbons (PAH), and turbidity are set according to the "Exhaust Gas Cleaning System Guide 2021" or other specified required values.

[0032] In this embodiment, after the engine room bilge water in the bilge water tank 2 is cleaned by the purification unit 4, the generated residue is sent to the waste oil collection tank 7. After the exhaust gas system circulating water and the closed desulfurization tower circulating water are cleaned by the purification unit 4, the generated residue is sent to the EGR & EGCS residue tank 8. A pipeline and a three-way valve are arranged behind the water analyzer 6. After the engine room bilge water in the bilge water tank 2 is treated by the purification unit 4, it is analyzed by the water analyzer 6. If the analysis is qualified and no alarm is triggered, it is discharged outside the ship; otherwise, an alarm is triggered and it is sent back to the bilge water tank 2. After the exhaust gas system circulating water and the closed desulfurization tower circulating water are treated by the purification unit 4, they are analyzed by the water analyzer 6. If the analysis is qualified and no alarm is triggered and the area where the ship is located permits discharge, they are discharged outside the ship; otherwise (an alarm is triggered or the area where the ship is located does not permit discharge), they are sent back to the blowdown water tank 1.

[0033] Specifically, the outlet of the purification unit pump 3 is respectively connected to the second stop valve 31 and the first check valve 32.

[0034] The other end of the first check valve 32 is connected to the purification unit 4. The water outlet of the purification unit 4 is connected to the water analyzer 6. The water outlet of the water analyzer 6 is connected to the fourth three-way valve 61. The two water outlets of the fourth three-way valve 61 are respectively connected to the discharge pipeline and the fifth three-way valve 62. A ninth check valve 63 and a fourth stop valve 64 are provided on the discharge pipeline, and finally discharged outside the ship; the two water outlets of the fifth three-way valve 62 are respectively connected back to the drain water tank 1 and the bilge water tank 2; the slag discharge port of the purification unit 4 is connected to the third three-way valve 41. The two water outlets of the third three-way valve 41 are respectively connected to the second check valve 42 and the third check valve 43. The water outlets of the second check valve 42 and the third check valve 43 are respectively connected to the EGR&EGCS residue tank 8 and the waste oil collection tank 7;

[0035] The outlet end of the second stop valve 31 is connected to the bilge water pre-separation tank 5; the oil separation port of the bilge water pre-separation tank 5 is also connected to the water inlet of the third check valve 43 to be discharged into the waste oil collection tank 7, and the remaining mixture separation port of the bilge water pre-separation tank 5 is connected to the bilge water tank 2 through the first stop valve 51.

[0036] As Figure 1 shown, the residue discharge port in the waste oil collection tank 7 is successively connected to the fifth check valve 71, the bilge water residue pump 72 and the seventh check valve 73. The discharge port of the seventh check valve 73 is connected to the third stop valve 74 and the ship-shore connection. The other end of the third stop valve 74 is connected to the waste oil sedimentation tank 9. The sludge discharge port of the waste oil sedimentation tank 9 is connected to the fourth check valve 91. The other end of the fourth check valve 91 is connected back to the waste oil collection tank 7;

[0037] Among them, the residue in the waste oil collection tank 7 is pumped to the waste oil sedimentation tank 9 or to the ship-shore through the bilge water residue pump 72. The type of pump can be a screw pump or a reciprocating pump; a heating device is provided in the waste oil sedimentation tank 9 to evaporate the water in the waste oil. The sludge can be sent to the incinerator for incineration, and the remaining sludge enters the waste oil collection tank 7 by gravity;

[0038] The sludge discharge port of the EGR&EGCS residue tank 8 is successively connected to the sixth check valve 81, the EGR&EGCS residue pump 82 and the eighth check valve 83. The sludge is pumped to the ship-shore through the EGR&EGCS residue pump 82. Since the residue after treatment of the EGR circulating water and the closed-loop desulfurization tower circulating water may contain sulfuric acid or NaOH, the type of corresponding pump can be a screw pump or a reciprocating pump, and the material can be selected as stainless steel or a material that can resist acidity or alkalinity.

[0039] The above is only a preferred embodiment of the present invention and is not used to limit the present invention. Those skilled in the art can make various modifications or equivalent replacements to the present invention within the essence and protection scope of the present invention. Such modifications or equivalent replacements should also be regarded as falling within the protection scope of the technical solution of the present invention.

Claims

1. A new type of ship engine room bilge water treatment system, characterized in that: It includes a drain water tank and a bilge water tank. The circulating water of the exhaust gas system enters the drain water tank. The water outlet of the drain water tank, the circulating water of the closed desulfurization tower and the water outlet of the bilge water tank are all connected to the purification unit pump. The water outlet of the purification unit pump is respectively connected to the purification unit and the bilge water pre-separation tank through valves. The oil separation outlet of the bilge water pre-separation tank is connected to the waste oil collection tank, and the remaining mixture separation outlet is connected to the bilge water tank. The drain outlet of the purification unit is connected to the water analyzer, and the slag discharge outlet is respectively connected to the waste oil collection tank and the residue tank through valves. The water analyzer controls the discharge out of the ship, the introduction into the drain water tank, and the introduction into the bilge water tank according to the detection results.

2. The novel ship engine room bilge water treatment system according to claim 1, characterized in that: The water outlet of the drain water tank, the circulating water of the closed desulfurization tower and the water outlet of the bilge water tank are selected to enter the purification unit pump through two three-way valves. The water analyzer controls the discharge out of the ship, the introduction into the drain water tank, and the introduction into the bilge water tank through two three-way valves.

3. A novel ship engine room bilge water treatment system according to claim 1, characterized in that: After the engine room bilge water in the bilge water tank is cleaned by the purification unit, the generated residue is sent to the waste oil collection tank.

4. A novel ship engine room bilge water treatment system according to claim 1 or 3, characterized in that: After the circulating water of the exhaust gas system and the circulating water of the closed desulfurization tower are cleaned by the purification unit, the generated residue is sent to the residue tank.

5. A novel ship engine room bilge water treatment system according to claim 1, characterized in that: After the engine room bilge water in the bilge water tank is treated by the purification unit, it is analyzed by the water analyzer. If the analysis is qualified, it is discharged out of the ship; otherwise, it is sent back to the bilge water tank.

6. A novel ship engine room bilge water treatment system according to claim 1 or 5, characterized in that: After the circulating water of the exhaust gas system and the circulating water of the closed desulfurization tower are treated by the purification unit, they are analyzed by the water analyzer. If the analysis is qualified and the area where the ship is located allows discharge, they are discharged out of the ship; otherwise, they are sent back to the drain water tank.

7. A novel ship engine room bilge water treatment system according to claim 1, characterized in that: The water qualified after being analyzed by the water analyzer is discharged out of the ship through the discharge pipeline. A check valve and a stop valve are provided on the discharge pipeline.

8. A novel ship engine room bilge water treatment system according to claim 1, characterized in that: The residue in the waste oil collection tank is pumped to the waste oil sedimentation tank or to the ship shore by the bilge water residue pump.

9. A novel ship engine room bilge water treatment system according to claim 8, characterized in that: A heating device is provided in the waste oil sedimentation tank to evaporate the water in the waste oil. The sludge is sent to the incinerator for incineration and / or enters the waste oil collection tank by gravity.

10. A novel ship engine room bilge water treatment system according to claim 1 or 8, characterized in that: The sludge in the residue tank is pumped to the ship shore by the residue pump.

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