CN212354326U - Ship wastewater treatment system - Google Patents

Abstract

The utility model relates to a boats and ships effluent disposal system relates to boats and ships effluent disposal technical field, and there is black water and grey water mixed treatment in current boats and ships sewage treatment to lead to the big problem of handling capacity. The scheme comprises a sewage output end, a storage cabin connected with the sewage output end, a connecting pipe connected with the storage cabin, a sewage treatment device connected with the connecting pipe and a discharge pipe connected with the sewage treatment device, wherein a connecting valve is arranged on the connecting pipe; the sewage output end comprises a black water output end and an ash water output end, the black water output end is connected to the storage cabin, the ash water output end is connected with a first ash water pipe and a second ash water pipe, the first ash water pipe is communicated with the storage cabin, the first ash water pipe is provided with a first valve, and the second ash water pipe is communicated with the discharge pipe, and the second ash water pipe is provided with a second valve. The scheme can realize the separation treatment of black water and grey water, reduce the sewage treatment capacity, and further avoid designing an overlarge sewage storage cabin, and improve the utilization rate of the internal space of the ship body.

Description

Ship wastewater treatment system

Technical Field

The utility model belongs to the technical field of boats and ships waste water treatment technique and specifically relates to a boats and ships effluent disposal system is related to.

Background

During the sailing process of the ship, various sewage is inevitably generated, typically domestic sewage discharged from kitchens, restaurants, dish washing rooms, laundry rooms and the like, and if the domestic sewage is directly discharged into the sea in a large amount, a large amount of oxygen dissolved in water is consumed, red tide is generated, and the survival of fishes and most aquatic organisms is endangered.

In the prior ship domestic sewage discharge regulation:

1: the untreated domestic sewage is allowed to be discharged in a sea area with the nearest distance to the shore being more than 12 nautical miles;

2: the domestic sewage after being crushed and disinfected is allowed to be discharged in a sea area with the nearest distance of 3 miles above;

3: in any case, the navigational speed of the ship is not less than 4 sections during discharging;

4: the approved domestic sewage treatment device for the ship is required to normally operate, the device conforms to the regulations of a master authority, and the domestic sewage waste liquid to be discharged is not required to generate visible floating solids in water and is not required to change the color of the water;

5: when the distance from the land is less than 3 nautical miles, the domestic sewage is strictly forbidden to be discharged, and the domestic sewage is temporarily stored.

Therefore, the conventional ship sewage discharge method is generally to directly discharge domestic sewage when sailing in a sea area above 12 nautical miles (hereinafter referred to as open sea); discharging sewage disinfected and crushed by a sewage treatment device when navigating in a sea area between 3 nautical miles and 12 nautical miles (hereinafter referred to as a territorial sea); when sailing in the sea area within 3 nautical miles (hereinafter referred to as inland sea), the sewage is stored in the storage cabin, and when the ship is in shore, the sewage in the storage cabin is transferred to a sewage collecting system on the shore through a shore connection, or the ship waits for sailing to the open sea and the territorial sea to be discharged.

In the existing discharge mode, both black water (the discharge of any type of toilets and urinals and other wastes) and grey water (other sewage generated on ships except black water, mainly wastewater and wastes from kitchens, laundries, toilets and the like) are gathered and treated together as sewage, and the grey water in the sewage is not required to be treated by a sewage treatment device in the territory of the sea, so that the sewage treatment capacity is overlarge, the design capacity of a storage cabin is large, and the efficient utilization of the internal space of a ship body is influenced.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a boats and ships effluent disposal system can realize the separation of black water and grey water and handle, reduces sewage treatment volume, and then does not need to design too big sewage storage cabin, improves hull inner space utilization.

The above object of the present invention can be achieved by the following technical solutions:

a ship wastewater treatment system comprises a sewage output end, a storage cabin connected with the sewage output end, a connecting pipe connected with the storage cabin, a sewage treatment device connected with the connecting pipe and a discharge pipe connected with the sewage treatment device, wherein a connecting valve is arranged on the connecting pipe; the sewage output end comprises a black water output end and an ash water output end, the black water output end is connected to the storage cabin, the ash water output end is connected with a first ash water pipe and a second ash water pipe, the first ash water pipe is communicated with the storage cabin, the first ash water pipe is provided with a first valve, and the second ash water pipe is communicated with a discharge pipe and the second ash water pipe is provided with a second valve.

By adopting the technical scheme, when in open sea areas and territorial sea areas, the black water is pushed into the storage cabin, and the first valve is closed and the second valve is opened, so that the grey water flows into the drainage pipe without passing through the storage cabin and the sewage treatment device; the black water in the storage cabin is conveyed into a sewage treatment device for treatment, then is discharged into a discharge pipe, and is discharged out of the ship together with the grey water;

when the device is in the inland sea area, the black water is pushed into the storage cabin, and the first valve is opened and the second valve is closed, so that the grey water also flows into the storage cabin and is merged with the black water; and conveying the merged sewage into a sewage treatment device for treatment, then discharging into a discharge pipe, and finally discharging to the outside of the ship.

Through the arrangement, when the ship sails in the open sea area and the territorial sea area, the separation treatment of black water and grey water is realized, the sewage treatment capacity is reduced, an overlarge sewage storage cabin is not required to be designed, and the utilization rate of the internal space of the ship body is improved.

The present invention may be further configured in a preferred embodiment as: and a quick discharge pipe is connected between the connecting pipe and the discharge pipe, and a quick discharge valve is arranged on the quick discharge pipe.

Through adopting above-mentioned technical scheme, when boats and ships sailed to open the open sea territory, can open the fast valve of arranging, then the sewage of storing in the storage tank can not pass through sewage treatment plant, and more swift discharges outside boats and ships to improve the sewage efficiency of discharging.

The present invention may be further configured in a preferred embodiment as: a direct vent pipe is connected between the black water output end and the sewage treatment device, and a direct vent valve is arranged on the direct vent pipe.

By adopting the technical scheme, when the ship sails to the open sea area, the quick discharge valve and the direct discharge valve can be opened, so that the sewage stored in the storage cabin can be more quickly discharged out of the ship without passing through the sewage treatment device, and part of the black water just discharged from the black water output end can be shunted by the direct discharge pipe, and the part of the black water is discharged from the discharge pipe after passing through the sewage treatment device without being stored in the storage cabin in advance, so that the sewage discharge efficiency is improved; wherein, the dischargeable amount of the discharge pipe in unit time is more than or equal to the total discharge amount of the quick discharge pipe, the second grey water pipe and the outlet of the sewage treatment device in unit time.

The present invention may be further configured in a preferred embodiment as: an alarm is arranged outside the storage cabin, and an alarm circuit used for controlling the power-on and power-off of the alarm according to the liquid level height in the storage cabin is arranged in the storage cabin.

By adopting the technical scheme, when the sewage level in the storage cabin is too high, the alarm circuit can control the alarm to send out an alarm signal, so that the staff is prompted to need to timely treat the sewage in the storage cabin; wherein the alarm can be a buzzer or a flashlight.

The present invention may be further configured in a preferred embodiment as: the alarm circuit comprises a first alarm circuit and a second alarm circuit,

the first liquid level sensor is arranged in the storage cabin and used for detecting the liquid level height in the storage cabin so as to output a liquid level detection value;

the first comparison unit is coupled to the output end of the first liquid level sensor to receive the liquid level detection value, compare the liquid level detection value with a preset value of the first comparison unit and output a first comparison signal according to a comparison result;

and the first execution unit is coupled to the output end of the first comparison unit to receive the first comparison signal and control the on-off of a power supply loop of the alarm.

By adopting the technical scheme, when the sewage level in the storage cabin is too high, the first comparison unit compares the liquid level detection value with the preset value of the first comparison unit, the liquid level detection value is larger than the preset value of the first comparison unit, the first comparison unit outputs a first comparison signal of high level, and the first execution unit controls the alarm to give an alarm; otherwise, when the liquid level in the storage cabin is lower and the liquid level detection value is smaller than the preset value of the first comparison unit, no alarm is given.

The present invention may be further configured in a preferred embodiment as: a main cavity and a standby cavity which are not communicated with each other are arranged in the storage cabin, inlets of the main cavity and the standby cavity are respectively connected with a main pipe and a standby pipe, the main pipe and the standby pipe are respectively connected with a main valve and a standby valve, and the main pipe and the standby pipe are both communicated with a black water output end; the outlets of the main cavity and the spare cavity are respectively connected with a main outlet pipe and a spare outlet pipe, the main outlet pipe and the spare outlet pipe are respectively connected with a main outlet valve and a spare outlet valve, and the main outlet pipe and the spare outlet pipe are both communicated with a connecting pipe.

By adopting the technical scheme, when the storage cabin is used, the problem that partial volume cannot be used often occurs, in the scheme, the storage cabin is partially divided into two cavities, the standby cavity is used for loading sewage when the main cavity is fully loaded, and the standby cavity is in an empty state if the main cavity is not fully loaded, so that the cleaning frequency of the standby cavity is favorably reduced.

The present invention may be further configured in a preferred embodiment as: the main valve and the standby valve are both electromagnetic valves, and the main outlet valve and the standby outlet valve are both check valves; and a shunt circuit for controlling the closing of the main valve and the opening of the standby valve or the opening of the main valve and the closing of the standby valve according to the liquid level height in the main cavity is arranged in the storage cabin.

By adopting the technical scheme, when the sewage level in the main cavity is too high, the shunt circuit can control the main valve to be closed and the standby valve to be opened so as to introduce the sewage into the standby cavity, so that the standby cavity is only used when the main cavity is filled with the sewage, the use frequency of the space in the standby cavity is reduced, and the cleaning frequency of the standby cavity is also reduced.

The present invention may be further configured in a preferred embodiment as: the shunt circuit comprises a current-dividing circuit and a current-dividing circuit,

the second liquid level sensor is arranged in the main cavity and used for detecting the liquid level height in the main cavity and outputting a liquid level detection value;

a second comparing unit, coupled to the output end of the second liquid level sensor, for receiving the liquid level detection value, comparing the liquid level detection value with a preset value of the second comparing unit, and outputting a second comparing signal according to the comparing result;

and the second execution unit is coupled to the output end of the second comparison unit to receive the second comparison signal and control the closing of the main valve and the opening of the standby valve or the opening of the main valve and the closing of the standby valve.

By adopting the technical scheme, when the sewage level in the main cavity is too high, the second comparison unit compares the liquid high detection value with the preset value of the second comparison unit, the liquid high detection value is greater than the preset value of the second comparison unit, the second comparison unit outputs a high-level second comparison signal, and the second execution unit controls the main valve to be closed and the standby valve to be opened; on the contrary, when the liquid level in the main cavity is lower and the liquid level detection value is smaller than the preset value of the second comparison unit, the second execution unit controls the main valve to be opened and the standby valve to be closed.

To sum up, the utility model discloses a following at least one boats and ships effluent disposal system beneficial technological effect:

1. in the scheme, the separation treatment of the black water and the grey water can be realized, the sewage treatment capacity is reduced, an overlarge sewage storage cabin is not required to be designed, and the internal space utilization rate of the ship body is improved;

2. in this scheme, when boats and ships sailed to open the open sea territory, can open fast row valve and direct vent, then the sewage of storage under-deck can not pass through sewage treatment plant, more swift discharge outside boats and ships to and just can be shunted partly by the direct vent from black water output exhaust black water, this part black water is discharged from the discharge pipe behind sewage treatment plant, and can not store earlier in the storage under-deck, thereby improve the discharge sewage efficiency.

Drawings

Fig. 1 is a schematic structural diagram according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second embodiment according to the present invention;

FIG. 3 is a diagram of an alarm circuit in the second embodiment;

fig. 4 is a schematic structural diagram of a third embodiment according to the present invention;

fig. 5 is a shunt circuit in the third embodiment.

In the figure, 1, a storage compartment; 11. a primary cavity; 12. a reserve chamber; 13. a main tube; 14. a standby pipe; 15. a primary valve; 16. a backup valve; 17. a main outlet pipe; 171. a primary outlet valve; 18. a spare outlet pipe; 181. a standby outlet valve; 2. a connecting pipe; 21. a connecting valve; 22. connecting a pump; 3. a sewage treatment device; 4. a discharge pipe; 41. a discharge valve; 42. the vertical wave-proof valve can be closed; 5. a toilet bowl; 51. a black water pump; 52. a first grey water pipe; 521. a first valve; 53. a second grey water pipe; 531. a second valve; 54. a face washing table; 55. a floor drain outlet; 56. a fire water flushing pipe; 57. an air tube; 58. a shore pipe is connected; 581. a shore valve; 582. a shore connection joint; 6. fast discharging pipes; 61. a quick discharge valve; 62. a straight pipe; 63. a direct discharge valve; 7. an alarm circuit; 71. a first liquid level sensor; 72. a first comparing unit; 73. a first execution unit; 8. a shunt circuit; 81. a second liquid level sensor; 82. a second comparing unit; 83. a second execution unit.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

referring to fig. 1, a ship wastewater treatment system disclosed by the present invention comprises a wastewater output end, a storage tank 1 connected to the wastewater output end, a connecting pipe 2 connected to the storage tank 1, a wastewater treatment device 3 connected to the connecting pipe 2, and a discharge pipe 4 connected to the wastewater treatment device 3; the connecting pipe 2 is provided with a connecting valve 21 and a connecting pump 22, the discharge pipe 4 is sequentially provided with a discharge valve 41 and a closable vertical type wave-proof valve 42 along the discharge direction, and the tail end of the discharge pipe 4 extends out of the ship body and is positioned below a heavy-load waterline;

wherein, the sewage output end comprises a black water output end and a grey water output end, the black water output end is connected with the storage cabin 1, a black water pump 51 is arranged at the black water output end, and the black water output end can output black water, such as sewage output by a position such as a toilet bowl 5; the grey water output end is connected with a first grey water pipe 52 and a second grey water pipe 53, the first grey water pipe 52 is communicated with the storage cabin 1, a first valve 521 is installed on the first grey water pipe 52, the second grey water pipe 53 is communicated between a discharge valve 41 on the discharge pipe 4 and a closable vertical type wave-proof valve 42, a second valve 531 is installed on the second grey water pipe 53, and the grey water output end can output grey water, such as sewage discharged by a wash stand 54 or a floor drain outlet 55.

In open sea areas and territorial sea areas, under the action of the black water pump 51, the black water is pushed into the storage cabin 1, and the first valve 521 is closed and the second valve 531 is opened, so that the grey water flows into the drainage pipe without passing through the storage cabin 1 and the sewage treatment device 3; under the action of the connecting pump 22, the black water in the storage cabin 1 is conveyed into the sewage treatment device 3 for treatment, then is discharged into the discharge pipe 4, and is discharged out of the ship together with the grey water;

in the inland sea area, under the action of the black water pump 51, the black water is pushed into the storage cabin 1, and the first valve 521 is opened and the second valve 531 is closed, so that the grey water also flows into the storage cabin 1 and is merged with the black water; the merged sewage is conveyed into the sewage treatment device 3 for treatment under the action of the connecting pump 22, and then is discharged into the discharge pipe 4, and finally is discharged out of the ship.

A quick-discharge pipe 6 is connected between the connecting pipe 2 and the discharge pipe 4, and a quick-discharge valve 61 is arranged on the quick-discharge pipe 6; a direct discharging pipe 62 is connected between the black water output end and the sewage treatment device 3, and a direct discharging valve 63 is arranged on the direct discharging pipe 62. When the ship sails to the open sea area, the quick drain valve 61 and the direct drain valve 63 can be opened, so that the sewage stored in the storage tank 1 can be more quickly discharged to the outside of the ship without passing through the sewage treatment device 3, and a part of the black water just discharged from the black water output end can be branched by the direct drain pipe 62, and the part of the black water is discharged from the discharge pipe 4 after passing through the sewage treatment device 3 without being stored in the storage tank 1 first, thereby improving the efficiency of discharging the sewage; it should be noted that the dischargeable amount of the discharge pipe 4 per unit time is equal to or greater than the total discharge amount per unit time of the quick discharge pipe 6, the second grey water pipe 53, and the outlet of the sewage treatment device 3.

The fire-fighting water flushing pipe 56 and the air pipe 57 are installed on both the sewage treatment device 3 and the storage tank 1, and the sewage treatment device 3 and the storage tank 1 can be flushed through the fire-fighting water flushing pipe 56. The air pipe 57 can help to maintain normal pressure in the sewage treatment device 3 and the storage cabin 1, and is beneficial to sewage circulation.

A shore pipe 58 is connected between the discharge valve 41 of the discharge pipe 4 and the closable vertical type wave-proof valve 42, a shore valve 581 and a shore connector 582 are installed on the shore pipe 58, and the sewage in the storage tank 1 can be transferred to a sewage collecting system (not shown in the figure) on the shore through the shore connector 582.

The first valve 521, the second valve 531, the direct discharge valve 63, and the discharge valve 41 are all stop check valves that prevent the fluid from flowing in the reverse direction when the valve body is opened; the connection valve 21, the quick drain valve 61, and the land valve 581 are all shut-off valves.

The implementation principle of the embodiment is as follows: when in open sea or in the territorial sea, the black water can be firstly stored in the storage cabin 1 in a centralized way, and is pumped into the sewage treatment device 3 for treatment, and then is discharged out of the ship, and the grey water can be directly discharged into the discharge pipe 4 and then is discharged out of the ship; when sailing at internal sea, the black water and the grey water can be converged into the storage cabin 1 and then discharged out of the ship after being treated by the sewage treatment device 3. In the process, especially in open sea or territorial sea, the flow separation of the black water and the grey water can be realized, so that the occupancy rate of the storage cabin 1 is saved, and the storage cabin 1 does not need to be designed to be too large in the design and manufacture process, so that the space utilization rate in the ship is improved.

Example two:

referring to fig. 2 and fig. 3, in order to disclose a ship wastewater treatment system of the present invention, the following contents are further added to the present embodiment on the basis of the first embodiment:

an alarm (not shown in the figure) is arranged outside the storage cabin 1, and an alarm circuit 7 for controlling the on-off state of the alarm according to the liquid level height in the storage cabin 1 is arranged in the storage cabin 1.

The alarm circuit 7 includes:

a first liquid level sensor 71 installed in the storage tank 1 and used for detecting the liquid level height in the storage tank 1 to output a liquid level detection value;

a first comparing unit 72 coupled to an output end of the first liquid level sensor 71 to receive the liquid level detection value, compare the liquid level detection value with a preset value of the first comparing unit 72, and output a first comparing signal according to the comparison result;

the first executing unit 73 is coupled to the output end of the first comparing unit 72 to receive the first comparing signal and control the power supply loop of the alarm to be turned on or off.

The first comparing unit 72 includes: the positive end of the comparator A is coupled to the output end of the first liquid level sensor 71, the resistor R1 is connected in series between the inverting end of the comparator A and the direct current VCC, the resistor R2 is connected in series between the inverting end of the comparator A and the ground, and the voltage value at the two ends of the resistor R2 is the preset value of the first comparing unit 72.

The first execution unit 73 includes: the circuit comprises a resistor R3, a resistor R4, a triode Q1, a freewheeling diode D1 and a relay KM 1.

One end of the resistor R3 is coupled to the output end of the comparator A, the other end of the resistor R3 is coupled to the base of the triode Q1, the resistor R4 is connected in series between the base of the triode Q1 and the ground, the emitter of the triode Q1 is grounded, the relay KM1 is provided with a coil and a normally-open contact KM1-1, the coil of the relay KM1 is connected in series between the collector of the triode Q1 and the direct current VCC, the normally-open contact KM1-1 of the relay KM1 is connected in series in a power supply loop of the alarm, the anode of the freewheeling diode D1 is coupled to the collector of the triode Q1, and the cathode of the.

The implementation principle of the embodiment is as follows: when the sewage level in the storage cabin 1 is too high, the alarm circuit 7 can control the alarm to send out an alarm signal, so that the staff is prompted to need to timely treat the sewage in the storage cabin 1; wherein the alarm can be a buzzer or a flashlight.

Example three:

referring to fig. 4 and 5, in order to disclose a ship wastewater treatment system of the present invention, the following contents are further added to the present embodiment on the basis of the first embodiment:

a main cavity 11 and a standby cavity 12 which are not communicated with each other are arranged in the storage cabin 1, the inlets of the main cavity 11 and the standby cavity 12 are respectively connected with a main pipe 13 and a standby pipe 14, the main pipe 13 and the standby pipe 14 are respectively connected with a main valve 15 and a standby valve 16, and the main pipe 13 and the standby pipe 14 are both communicated with a black water output end; the outlets of the main cavity 11 and the spare cavity 12 are respectively connected with a main outlet pipe 17 and a spare outlet pipe 18, the main outlet pipe 17 and the spare outlet pipe 18 are respectively connected with a main outlet valve 171 and a spare outlet valve 181, and the main outlet pipe 17 and the spare outlet pipe 18 are both communicated with the connecting pipe 2;

when the storage cabin 1 is used, a problem that part of the volume cannot be used often occurs, and in this embodiment, the interior of the storage cabin 1 is divided into two cavities, wherein the spare cavity 12 is used for loading sewage when the main cavity 11 is fully loaded, and is in an empty state otherwise, which is beneficial to reducing the cleaning frequency of the spare cavity 12.

The main valve 15 and the standby valve 16 are both electromagnetic valves, and the main outlet valve 171 and the standby outlet valve 181 are both check valves; the storage cabin 1 is internally provided with a shunt circuit 8 which is used for controlling the closing of the main valve 15 and the opening of the standby valve 16 or the opening of the main valve 15 and the closing of the standby valve 16 according to the liquid level height in the main cavity 11.

The shunt circuit 8 includes: the second liquid level sensor 81 is installed in the main cavity 11 and used for detecting the liquid level height in the main cavity 11 and outputting a liquid level detection value;

a second comparing unit 82, coupled to the output end of the second liquid level sensor 81, for receiving the liquid level detection value, comparing the liquid level detection value with a preset value of the second comparing unit 82, and outputting a second comparison signal according to the comparison result;

the second execution unit 83 is coupled to the output end of the second comparison unit 82 to receive the second comparison signal, and controls the main valve 15 to close, the backup valve 16 to open, or the main valve 15 to open, and the backup valve 16 to close.

The second comparing unit 82 includes: the positive end of the comparator B is coupled to the output end of the second liquid level sensor 81, the resistor R5 is connected in series between the inverting end of the comparator B and the direct current VCC, the resistor R6 is connected in series between the inverting end of the comparator B and the ground, and the voltage value at the two ends of the resistor R6 is the preset value of the second comparing unit 82.

The second execution unit 83 includes: the circuit comprises a resistor R7, a resistor R8, a triode Q2, a freewheeling diode D2 and a relay KM 2.

One end of a resistor R7 is coupled to the output end of the comparator B, the other end of the resistor R7 is coupled to the base of the triode Q2, the resistor R8 is connected in series between the base of the triode Q2 and the ground, the emitter of the triode Q2 is grounded, the relay KM2 is provided with a coil, a normally closed contact KM2-1 and a normally open contact KM2-2, the coil of the relay KM2 is connected in series between the collector of the triode Q2 and the direct current VCC, the normally closed contact KM2-1 of the relay KM2 is connected in series in the power supply loop of the first solenoid valve, the normally open contact KM2-2 of the relay KM2 is connected in series in the power supply loop of the second solenoid valve, the anode of the freewheeling diode D2 is coupled to the collector of.

The implementation principle of the embodiment is as follows: when the sewage level in the main cavity 11 is too high, the shunt circuit 8 can control the main valve 15 to close and the standby valve 16 to open so as to introduce the sewage into the standby cavity 12, so that the standby cavity 12 is only used when the main cavity 11 is full of the sewage, the use frequency of the space in the standby cavity 12 is reduced, and the cleaning frequency of the standby cavity 12 is also reduced.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims (8)

1. A ship wastewater treatment system comprises a sewage output end, a storage cabin (1) connected with the sewage output end, a connecting pipe (2) connected with the storage cabin (1), a sewage treatment device (3) connected with the connecting pipe (2) and a discharge pipe (4) connected with the sewage treatment device (3), wherein a connecting valve (21) is installed on the connecting pipe (2); the method is characterized in that: the sewage output end comprises a black water output end and an ash water output end, the black water output end is connected to the storage cabin (1), the ash water output end is connected with a first ash water pipe (52) and a second ash water pipe (53), the first ash water pipe (52) is communicated with the storage cabin (1) and the first ash water pipe (52) and is provided with a first valve (521), and the second ash water pipe (53) is communicated with the discharge pipe (4) and the second ash water pipe (53) and is provided with a second valve (531).

2. The marine wastewater treatment system according to claim 1, wherein: a quick-discharge pipe (6) is connected between the connecting pipe (2) and the discharge pipe (4), and a quick-discharge valve (61) is installed on the quick-discharge pipe (6).

3. The marine wastewater treatment system according to claim 2, wherein: a direct drain pipe (62) is also connected between the black water output end and the sewage treatment device (3), and a direct drain valve (63) is arranged on the direct drain pipe (62).

4. The marine wastewater treatment system according to claim 1, wherein: an alarm is arranged outside the storage cabin (1), and an alarm circuit (7) used for controlling the on-off state of the alarm according to the liquid level height in the storage cabin (1) is arranged in the storage cabin (1).

5. The marine wastewater treatment system according to claim 4, wherein: the alarm circuit (7) comprises a circuit,

the first liquid level sensor (71) is arranged in the storage cabin (1) and is used for detecting the liquid level height in the storage cabin (1) so as to output a liquid level detection value;

a first comparing unit (72) coupled to an output end of the first liquid level sensor (71) for receiving the liquid level detection value, comparing the liquid level detection value with a preset value of the first comparing unit (72), and outputting a first comparing signal according to the comparison result;

and the first execution unit (73) is coupled to the output end of the first comparison unit (72) to receive the first comparison signal and control the on-off of a power supply loop of the alarm.

6. The marine wastewater treatment system according to claim 1, wherein: a main cavity (11) and a standby cavity (12) which are not communicated with each other are arranged in the storage cabin (1), inlets of the main cavity (11) and the standby cavity (12) are respectively connected with a main pipe (13) and a standby pipe (14), the main pipe (13) and the standby pipe (14) are respectively connected with a main valve (15) and a standby valve (16), and the main pipe (13) and the standby pipe (14) are both communicated with a black water output end; the outlets of the main cavity (11) and the spare cavity (12) are respectively connected with a main outlet pipe (17) and a spare outlet pipe (18), the main outlet pipe (17) and the spare outlet pipe (18) are respectively connected with a main outlet valve (171) and a spare outlet valve (181), and the main outlet pipe (17) and the spare outlet pipe (18) are both communicated with the connecting pipe (2).

7. The marine wastewater treatment system according to claim 6, wherein: the main valve (15) and the standby valve (16) are both electromagnetic valves, and the main outlet valve (171) and the standby outlet valve (181) are both check valves; a shunt circuit (8) which is used for controlling the closing of the main valve (15) and the opening of the standby valve (16) or the opening of the main valve (15) and the closing of the standby valve (16) according to the liquid level height in the main cavity (11) is arranged in the storage cabin (1).

8. The marine wastewater treatment system according to claim 7, wherein: the shunt circuit (8) comprises a shunt circuit,

the second liquid level sensor (81) is arranged in the main cavity (11) and is used for detecting the liquid level height in the main cavity (11) and outputting a liquid level detection value;

a second comparing unit (82) coupled to an output end of the second liquid level sensor (81) for receiving the liquid level detection value, comparing the liquid level detection value with a preset value of the second comparing unit (82), and outputting a second comparison signal according to the comparison result;

and the second execution unit (83) is coupled to the output end of the second comparison unit (82) to receive the second comparison signal and control the main valve (15) to be closed, the standby valve (16) to be opened or the main valve (15) to be opened and the standby valve (16) to be closed.

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