Ship water pollution treatment device with pre-preprocessing

Abstract

This invention relates to the field of wastewater treatment technology and discloses a ship water pollution treatment device with pretreatment, including a support assembly. The support assembly includes a base, and a pretreatment integrated tank assembly and an MBR membrane bioreactor module are installed side by side on the top surface of the base. The pretreatment integrated tank assembly includes a separation chamber, a swirl chamber, and a sedimentation chamber that are interconnected from top to bottom. A water inlet pipe is tangentially arranged on the side wall of the separation chamber. A grid is installed inside the separation chamber. An anti-sway plate is horizontally installed below the separation chamber. An oil collection tank is welded to the top of the swirl chamber. A guide plate is welded to the inner wall of the swirl chamber. An annular overflow weir is welded to the upper end of the sedimentation chamber. Inclined tube packing is installed below the annular overflow weir. One end of the annular overflow weir is connected to a water supply pipe. This invention solves the problems of low integration, large space occupation, high energy consumption, poor anti-sway performance leading to unstable treatment effect under ship dynamic conditions, and complex operation and maintenance costs of sludge systems in traditional ship water pollution treatment equipment.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a ship water pollution treatment device with pretreatment. Background Technology

[0002] With the rapid development of the global shipping industry, shipping has become the most important mode of transportation in international trade. The number of ships and their voyage mileage continue to grow, and ship-borne water pollution prevention has become an important part of marine environmental protection. If sewage, grey water, and oily wastewater generated by ships during navigation are discharged directly without effective treatment, they will seriously impact the marine ecosystem, damage marine biodiversity, and threaten the ecological security and human health of coastal areas. The compact installation space inside ships, coupled with the swaying and rolling of the hull during navigation, and the mixture of sewage with debris, floating oil, and fine suspended solids, mean that the effectiveness of pretreatment directly affects the operation of the downstream membrane treatment. However, existing equipment still has some problems in use, as detailed below:

[0003] In daily use, existing pollution treatment equipment often has pretreatment units arranged in a split manner, requiring a large number of connecting pipes and flanges. This not only takes up a large area and is difficult to adapt to the narrow cabins of ships, but also requires multiple intermediate booster pumps, which significantly increases energy consumption and failure rate. The swaying of the ship will disrupt the flow field and separation interface, resulting in a sharp drop in treatment efficiency under dynamic operating conditions. Existing sludge systems are also scattered, with complex and easily clogged pipelines, making equipment maintenance difficult and costly. Summary of the Invention

[0004] This invention provides a ship water pollution treatment device with pretreatment, which has the advantages of high integration, stable and efficient treatment effect, and excellent anti-ship sway performance, and solves the problems mentioned in the background art.

[0005] This invention provides the following technical solution: a ship water pollution treatment device with pretreatment, including a support assembly, the support assembly including a base, a pretreatment integrated tank assembly and an MBR membrane bioreactor module installed side by side on the top surface of the base, the pretreatment integrated tank assembly including a separation chamber, a swirling chamber and a sedimentation chamber connected to each other from top to bottom, an inlet pipe tangentially arranged on the side wall of the separation chamber, a grid installed inside the separation chamber, an anti-sway plate horizontally installed below the separation chamber, an oil collection tank welded to the top of the swirling chamber, a guide plate welded to the inner wall of the swirling chamber, an annular overflow weir welded to the upper end of the sedimentation chamber, inclined tube packing installed below the annular overflow weir, a water supply pipe connected to one end of the annular overflow weir, the pretreatment integrated tank assembly connected to the MBR membrane bioreactor module through the water supply pipe, a stirring assembly installed on the top of the pretreatment integrated tank assembly, the stirring assembly including a motor and a stirring shaft, the top of the stirring shaft being drivenly connected to the output shaft of the motor, and a stirring blade installed at the bottom of the stirring shaft;

[0006] It also includes a conveying assembly, which includes a sludge conveying pump, a first conveying pipe and a second conveying pipe. The sludge conveying pump is fixedly installed on the top surface of the base. The inlet of the sludge conveying pump is connected to the bottom of the pretreatment integrated tank assembly and the sludge discharge port of the MBR membrane bioreactor module through the second conveying pipe. The sludge conveying pump is connected to the inlet of the sludge dewatering machine through the first conveying pipe. The sludge dewatering machine is located below the base.

[0007] In a preferred embodiment, the separation chamber, swirling chamber, and settling chamber are combined into a cylindrical tank, and the separation chamber, swirling chamber, and settling chamber are arranged coaxially.

[0008] In a preferred embodiment, the swirling cavity is a conical cavity that is wider at the top and narrower at the bottom. The swirling cavity is located between the separation cavity and the sedimentation cavity. The guide plate is arranged in a spiral shape and extends spirally from top to bottom along the axial direction of the swirling cavity.

[0009] In a preferred embodiment, the grid is installed at an angle inside the separation chamber, and the anti-sway plate is arranged in a cross shape. There are two anti-sway plates, which are installed below the separation chamber and inside the sedimentation chamber, respectively. The center intersection of the cross-shaped plates of the anti-sway plate is provided with an installation hole, and the stirring shaft extends through the installation hole into the sedimentation chamber.

[0010] In a preferred embodiment, the oil collecting trough is an annular groove arranged circumferentially along the inner wall of the top of the swirling cavity, and an oil outlet pipe is connected to one end of the oil collecting trough. The annular overflow weir is an annular protrusion arranged circumferentially along the inner wall of the top of the sedimentation cavity. A water collecting trough is formed between the outer side of the annular overflow weir and the inner wall of the sedimentation cavity, and the water supply pipe is connected to the water collecting trough.

[0011] In a preferred embodiment, the inclined tube packing is inclinedly arranged inside the sedimentation chamber, and another anti-sway plate is arranged below the inclined tube packing. The center point of the inclined tube packing and the anti-sway plate are coaxial and both have through holes. The stirring shaft passes through the through holes, and the stirring blades at the bottom of the stirring shaft are located below the anti-sway plate. A sludge hopper is welded to the bottom of the sedimentation chamber.

[0012] In a preferred embodiment, the MBR membrane bioreactor module is provided with a rectangular box on the outside, a curtain-type MBR membrane module is installed inside the rectangular box, a perforated aeration system is provided at the bottom of the box, and a product water outlet is provided at the top.

[0013] In a preferred embodiment, one end of the second conveying pipe is connected to the bottom outlet of the sludge hopper and the sludge discharge port of the MBR membrane bioreactor module, and the other end is connected to the inlet of the sludge conveying pump. One end of the first conveying pipe is connected to the outlet of the sludge conveying pump, and the other end is connected to the inlet of the sludge dewatering machine.

[0014] In a preferred embodiment, the sludge dewatering machine has a discharge port at one end away from the first conveying pipe, and an inclined unloading slide plate at one end of the discharge port. The sludge dewatering machine is located directly below the pretreatment integrated tank assembly and the MBR membrane bioreactor module.

[0015] In a preferred embodiment, support legs are provided at the four corners of the base bottom surface, and a surrounding guardrail is welded to the top surface of the base. The pretreatment integrated tank assembly and the MBR membrane bioreactor module are located inside the guardrail.

[0016] The present invention has the following beneficial effects:

[0017] 1. This invention integrates the separation chamber, swirling chamber, and sedimentation chamber into a vertical tank, eliminating the connecting pipes and flange interfaces between traditional decentralized pretreatment units, reducing the footprint of traditional equipment, and perfectly adapting to the limited installation space inside a ship's cabin. At the same time, the wastewater flows by gravity through the three stages of treatment, reducing system energy consumption.

[0018] 2. This invention incorporates a pretreatment integrated tank assembly. The separation chamber forms an initial vortex through tangential water inlet, which, combined with an inclined grid, automatically traps and discharges large particles of impurities. The vortex chamber utilizes a tapered structure that is wider at the top and narrower at the bottom, along with a spiral guide plate, to continuously enhance the centrifugal force of the water as it flows downwards, achieving efficient separation of oil droplets and water. The sedimentation chamber uses a combination of magnetic seed flocculation and inclined tube packing to form high-density magnetic flocs from fine suspended matter, allowing them to settle rapidly. Simultaneously, the synergistic design of the tangential water inlet pipe, spiral guide plate, and cross-shaped anti-sway plate effectively suppresses the interference of rolling and pitching during ship navigation on the treatment effect, thereby ensuring the stability of oil-water separation and flocculation sedimentation under dynamic ship operating conditions.

[0019] 3. This invention utilizes a pretreatment integrated tank assembly in conjunction with an MBR membrane bioreactor module. The pretreatment integrated tank assembly efficiently pre-treats wastewater, removing most of the large particulate impurities, floating oil, and suspended solids. This significantly reduces the processing load on the subsequent MBR membrane bioreactor module, effectively mitigating membrane fouling and extending the service life of the membrane assembly. Simultaneously, a centralized sludge conveying system is employed to uniformly transport the sludge generated by the pretreatment unit and the MBR unit to a sludge dewatering machine below the base for processing. The layered arrangement significantly shortens the sludge conveying path and reduces the risk of pipeline blockage due to high solids content sludge. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0022] Figure 3This is a schematic diagram of the structure on the back side of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the support component, MBR membrane bioreactor module, and sludge dewatering machine of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the separation chamber, water inlet pipe, bar screen, anti-sway plate, and oil collection tank of the present invention;

[0025] Figure 6 This is a schematic diagram of the sedimentation chamber, annular overflow weir, inclined tube packing, and water delivery pipe of the present invention;

[0026] Figure 7 This is a schematic diagram of the swirling cavity and guide plate of the present invention.

[0027] In the diagram: 1. Support assembly; 101. Base; 102. Support leg; 103. Guardrail; 2. Pretreatment integrated tank assembly; 201. Separation chamber; 202. Inlet pipe; 203. Grille; 204. Anti-sway plate; 205. Swirl chamber; 206. Guide plate; 207. Oil collection tank; 208. Sedimentation chamber; 209. Sludge hopper; 2010. Annular overflow weir; 2011. Inclined tube packing; 2012. Water delivery pipe; 3. Mixing assembly; 301. Motor; 302. Mixing shaft; 303. Mixing blade; 4. MBR membrane bioreactor module; 5. Conveying assembly; 501. Sludge conveying pump; 502. First conveying pipe; 503. Second conveying pipe; 6. Sludge dewatering machine. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The ship water pollution treatment equipment with pretreatment involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4The illustrated ship water pollution treatment equipment with pretreatment includes a support assembly 1, which includes a base 101. A pretreatment integrated tank assembly 2 and an MBR membrane bioreactor module 4 are mounted side by side on the top surface of the base 101. Support legs 102 are provided at the four corners of the bottom surface of the base 101 for fixed connection with the ship's hull steel structure. A surrounding guardrail 103 is welded to the top surface of the base 101. The pretreatment integrated tank assembly 2 and the MBR membrane bioreactor module 4 are located inside the guardrail 103, which provides operational safety protection.

[0030] Compared with existing technologies, this application integrates three functions—grid slag removal, cyclone oil removal, and flocculation sedimentation—into a single vertical pretreatment integrated tank. It adopts an integrated welded structure, which saves installation space in the ship's cabin and avoids pipeline clogging. Through the combined design of a three-stage cavity arranged coaxially, a spiral guide plate 206, and a cross-shaped anti-sway plate 204, it effectively suppresses the flow field turbulence caused by rolling and pitching during ship navigation, ensuring the stability of oil-water separation and sedimentation effects.

[0031] Please see Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 The illustrated ship water pollution treatment equipment includes a pretreatment integrated tank assembly 2 comprising a separation chamber 201, a swirling chamber 205, and a sedimentation chamber 208, which are interconnected from top to bottom. The separation chamber 201, swirling chamber 205, and sedimentation chamber 208 are combined to form a cylindrical tank. The three chambers are integrally welded without additional flanges, ensuring smooth connectivity between them and preventing clogging at pipe connections. The separation chamber 201, swirling chamber 205, and sedimentation chamber 208 are coaxially aligned, ensuring stable water flow along the axial direction within the tank and preventing flow field disturbances caused by eccentricity. During ship swaying, the vortex chamber 205 is a conical cavity that is wider at the top and narrower at the bottom. The conical structure allows the water flow to gradually increase in speed and continuously enhance centrifugal force as it flows downward, significantly improving the oil-water separation efficiency. The vortex chamber 205 is located between the separation chamber 201 and the sedimentation chamber 208. The guide plate 206 is spirally arranged and extends spirally from top to bottom along the axial direction of the vortex chamber 205, guiding the sewage flowing out of the separation chamber 201 to form a stable downward spiral flow. This effectively suppresses liquid surface fluctuations and vortex turbulence caused by ship rolling and pitching, ensuring the stability of the oil-water separation effect.

[0032] In this embodiment, it should be noted that the pretreatment integrated tank assembly 2 is the pretreatment unit of the equipment, which integrates three functions—grid slag removal, cyclone oil removal, and flocculation sedimentation—into a single vertical tank, greatly saving installation space inside the ship's cabin.

[0033] A water inlet pipe 202 is tangentially installed on the side wall of the separation chamber 201. The axis of the water inlet pipe 202 is tangential to the inner wall of the separation chamber 201, so that the sewage entering the tank forms an initial vortex, throwing large particles of impurities toward the tank wall. A grid 203 is installed inside the separation chamber 201. An anti-sway plate 204 is horizontally installed below the separation chamber 201. The grid 203 is installed at an angle inside the separation chamber 201 to intercept large-volume debris such as hair, fibers, and plastic bags in the sewage. The intercepted debris can automatically slide along the inclined mesh surface to the slag discharge port for discharge. The anti-sway plate 204 is arranged in a cross shape. There are two anti-sway plates 204, which are installed below the separation chamber 201 and inside the sedimentation chamber 208, respectively. An installation hole is opened at the center intersection of the cross-shaped plate of the anti-sway plate 204. The stirring shaft 302 extends through the installation hole into the sedimentation chamber 208. The stirring shaft 302 and the installation hole are clearance fit, which does not affect the normal rotation of the stirring shaft 302.

[0034] In this embodiment, it should be noted that the tangential water inlet pipe 202 is welded to the upper side wall of the separation chamber 201 to form an initial swirling flow of water. The grid 203 is inclinedly welded to the inner wall of the separation chamber 201 to intercept large particles of debris. The cross-shaped anti-sway plate 204 is horizontally welded below the grid 203 to suppress the surface fluctuation of the liquid when the ship is rocking.

[0035] Please see Figure 2 , Figure 5 , Figure 6 and Figure 7 The illustrated ship water pollution treatment device features a pre-treatment system. An oil collection tank 207 is welded to the top of a vortex chamber 205. A guide plate 206 is welded to the inner wall of the vortex chamber 205, with its outer edge continuously welded and fixed to the conical inner wall of the vortex chamber 205. An annular overflow weir 2010 is welded to the upper end of a sedimentation chamber 208. Inclined tube packing 2011 is installed below the annular overflow weir 2010 to increase the effective sedimentation area and accelerate the settling of fine suspended solids. One end of the annular overflow weir 2010 is connected to a water supply pipe 2012. The oil collection tank 207 is... An annular groove is provided circumferentially along the inner wall of the top of the swirl chamber 205. The bottom of the groove is continuously and fully welded to the inner wall of the transition section between the swirl chamber 205 and the separation chamber 201. One end of the oil collection tank 207 is connected to an oil outlet pipe. The oil outlet pipe is led out from the bottom of the oil collection tank 207 and extends through the side wall of the tank to the outside. It is used to continuously discharge the collected floating oil outside the tank. The annular overflow weir 2010 is an annular protrusion provided circumferentially along the inner wall of the top of the sedimentation chamber 208. A water collection tank is formed between the outer side of the annular overflow weir 2010 and the inner wall of the sedimentation chamber 208. The water delivery pipe 2012 is connected to the water collection tank.

[0036] In this embodiment, it should be noted that the oil collection tank 207 is welded to the inner wall of the transition section between the vortex chamber 205 and the separation chamber 201, and is used to collect the floating oil that accumulates on the surface and discharge it out of the tank through the oil outlet pipe. The spiral guide plate 206 is continuously welded to the conical inner wall of the vortex chamber 205, and is used to guide the sewage to form a stable downward vortex, thereby enhancing the centrifugal separation effect of oil and water. The annular overflow weir 2010 is welded to the upper inner wall of the sedimentation chamber 208, and is used to achieve uniform water discharge. The inclined tube packing 2011 is installed below the overflow weir, and is used to increase the effective sedimentation area and accelerate the settling of fine suspended solids. The water conveying pipe 2012 is connected to the water collection tank outside the overflow weir, and is used to smoothly transport the collected clean water to the subsequent treatment unit.

[0037] Please see Figure 1 , Figure 2 and Figure 3 The illustrated ship water pollution treatment equipment has a pretreatment system. The pretreatment integrated tank assembly 2 is connected to the MBR membrane bioreactor module 4 via a water supply pipe 2012. The outlet end of the water supply pipe 2012 is sealed to the inlet of the side wall of the MBR membrane bioreactor module 4 via a flange. The MBR membrane bioreactor module 4 is equipped with a rectangular box, which is fixed to the top surface of the base 101 by bolts. A curtain-type MBR membrane module is installed inside the rectangular box and is suspended and fixed inside the box by a top hanging frame. A perforated aeration system is provided at the bottom of the box. The perforated aeration system is connected to an external aeration fan through a pipeline to provide oxygen for microorganisms and flush the membrane surface to prevent pollution. A product water outlet is provided at the top for discharging treated clean water that meets the standards.

[0038] In this embodiment, it should be noted that a manual valve is installed on the water supply pipe 2012 to control the inlet water flow and to cut off the pipeline during maintenance. The bottom of the rectangular box of the MBR membrane bioreactor module is provided with a sludge discharge port, which is connected to the second conveying pipe 503 through a branch pipe to discharge the remaining sludge in the membrane tank. The top hoisting frame is welded and fixed to the inner wall of the top of the box, which can realize the overall hoisting and replacement of the curtain-type MBR membrane module.

[0039] Please see Figure 1 , Figure 2 and Figure 3The illustrated ship water pollution treatment equipment includes a pretreatment integrated tank assembly 2 with a stirring assembly 3 mounted on top. A motor 301 is fixedly mounted at the center of the top of the tank via flange bolts. The stirring assembly 3 includes a motor 301 and a stirring shaft 302. The top end of the stirring shaft 302 is connected to the output shaft of the motor 301, and a stirring blade 303 is mounted on the bottom end of the stirring shaft 302. Inclined tube packing 2011 is arranged at an incline inside the sedimentation chamber 208, and another anti-sway plate 204 is arranged below the inclined tube packing 2011. The inclined tube packing 2011 and the anti-sway plate 204 are coaxially aligned and have through holes. The stirring shaft 302 passes through the through holes. The stirring blade 303 at the bottom of the stirring shaft 302 is located below the anti-sway plate 204 and is used to stir the bottom sludge to prevent caking. The bottom of the sedimentation chamber 208 is welded with a sludge hopper 209, which is used to collect the sedimented sludge and guide it to the bottom outlet. The outer walls of the sedimentation chamber 208 are connected to the reagent dosing pipes on both sides, which are used to add magnetic seeds and flocculants respectively to form magnetic flocs, and the mixture is stirred by the stirring blade 303.

[0040] In this embodiment, it should be noted that the motor 301 is vertically fixed to the center of the top of the tank by flange bolts. The top of the stirring shaft 302 is coaxially driven with the output shaft of the motor 301 through a rigid coupling to ensure smooth power transmission without swaying. The stirring shaft 302 passes through the center through hole of the inclined tube packing 2011 and the anti-sway plate 204 with clearance fit. The inclined tube packing 2011 is inclined and fixed by an annular bracket welded to the cavity wall, which greatly increases the effective sedimentation area. Two reagent dosing pipes are symmetrically welded to the upper outer wall of the sedimentation chamber 208, located below the inclined tube packing 2011. After the added magnetic seeds and flocculants are mixed with the water flow, they are stirred at low speed by the stirring blade 303 to form dense magnetic flocs, which significantly improves the settling speed of suspended solids.

[0041] Please see Figure 1 , Figure 2 and Figure 3The illustrated ship water pollution treatment equipment with pretreatment includes a conveying assembly 5 comprising a sludge conveying pump 501, a first conveying pipe 502, and a second conveying pipe 503. The sludge conveying pump 501 is fixedly installed on the top surface of the base 101 to adapt to ship vibration conditions. The inlet of the sludge conveying pump 501 is connected to the bottom of the pretreatment integrated tank assembly 2 and the sludge discharge port of the MBR membrane bioreactor module 4 via the second conveying pipe 503. One end of the second conveying pipe 503 is connected to the bottom outlet of the sludge hopper 209. The first conveying pipe 502 is connected to the sludge discharge port of the MBR membrane bioreactor module 4. The second conveying pipe 503 is connected to the bottom outlet of the sludge hopper 209 and the sludge discharge port of the MBR membrane bioreactor module 4 in parallel using a three-way connector to realize centralized sludge conveying of the two units. The other end is connected to the inlet of the sludge conveying pump 501. One end of the first conveying pipe 502 is connected to the outlet of the sludge conveying pump 501, and the other end is connected to the inlet of the sludge dewatering machine 6. All interfaces are detachably connected using flanges and sealing gaskets.

[0042] In this embodiment, it should be noted that the sludge transfer pump 501 is fixed to the top surface of the base 101 by shock-absorbing seat bolts, which effectively attenuates the vibration of the pump body during operation and is suitable for the turbulent conditions during ship navigation. Each branch pipe of the tee joint of the second transfer pipe 503 is equipped with a shut-off valve, which can independently control the sludge discharge operation of the pretreatment integrated tank and the MBR membrane bioreactor module, which is convenient for single-unit inspection and maintenance. All pipeline interfaces are detachably connected with flanges and oil-resistant sealing gaskets, which is convenient for quick disassembly and unblocking when the pipeline is blocked.

[0043] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 The above describes a ship water pollution treatment device with pretreatment. A sludge conveying pump 501 is fixedly installed on the top surface of the base 101 by a shock-absorbing seat. The sludge conveying pump 501 is connected to the inlet of the sludge dewatering machine 6 through the first conveying pipe 502. The sludge dewatering machine 6 is located below the base 101. The sludge dewatering machine 6 has an outlet at one end away from the first conveying pipe 502. The outlet end is equipped with a downwardly inclined unloading slide plate for smoothly exporting the dewatered sludge cake to an external collection device. The sludge dewatering machine 6 is located directly below the pretreatment integrated tank assembly 2 and the MBR membrane bioreactor module 4.

[0044] In this embodiment, it should be noted that the sludge conveying pump 501 adopts a cam rotor type positive displacement pump adapted to high solids sludge. The shock-absorbing seat is connected to the pump body and the top surface of the base 101 by bolts, which effectively isolates the vibration of the pump body from being transmitted to the ship structure. The upper end of the unloading slide plate is welded and fixed to the lower edge of the discharge port. The downward tilted structure allows the dewatered sludge cake to slide down automatically by gravity without the need for an additional pushing device.

[0045] Working principle: Shipboard sewage enters the separation chamber 201 through the tangential inlet pipe 202, forming an initial vortex. The bar screen 203 traps large debris, and the anti-sway plate 204 suppresses surface fluctuations caused by ship rolling. The sewage flows downward into the vortex chamber 205, where it is guided by the spiral guide plate 206 to form a stable downward vortex. Oil droplets rise to the oil collection tank 207 due to density difference and are discharged through the oil outlet pipe. Subsequently, the sewage enters the sedimentation chamber 208, where the added magnetic seeds and flocculants are mixed by the stirring blades 303 to form magnetic flocs. Under the action of the inclined tube packing 2011, these flocs quickly settle into the conical shape. The sludge hopper 209 collects the supernatant through the annular overflow weir 2010 and then enters the MBR membrane bioreactor module 4 through the water conveying pipe 2012. The perforated aeration system provides oxygen to the microorganisms and washes the membrane surface. The curtain-type MBR membrane module achieves sludge-water separation. The qualified clean water is discharged from the top product outlet. The sludge produced by the pretreatment integrated tank module 2 and the MBR membrane bioreactor module 4 is collected through the second conveying pipe 503 to the sludge conveying pump 501 and sent to the sludge dewatering machine 6 below the base 101 through the first conveying pipe 502. The dewatered sludge cake is discharged and collected through the unloading slide plate.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ship water pollution treatment device with pretreatment, comprising a support assembly (1), characterized in that: The support assembly (1) includes a base (101). A pretreatment integrated tank assembly (2) and an MBR membrane bioreactor module (4) are installed side by side on the top surface of the base (101). The pretreatment integrated tank assembly (2) includes a separation chamber (201), a swirling chamber (205), and a sedimentation chamber (208) that are interconnected from top to bottom. An inlet pipe (202) is tangentially arranged on the side wall of the separation chamber (201). A grid mesh (203) is installed inside the separation chamber (201). An anti-sway plate (204) is horizontally installed below the separation chamber (201). An oil collection tank (207) is welded to the top of the swirling chamber (205), and a flow guide is welded to the inner wall of the swirling chamber (205). Plate (206), the sedimentation chamber (208) is welded with an annular overflow weir (2010), the annular overflow weir (2010) is installed with inclined tube packing (2011) below it, one end of the annular overflow weir (2010) is connected to a water supply pipe (2012), the pretreatment integrated tank assembly (2) is connected to the MBR membrane bioreactor module (4) through the water supply pipe (2012), the top of the pretreatment integrated tank assembly (2) is equipped with a stirring assembly (3), the stirring assembly (3) includes a motor (301) and a stirring shaft (302), the top of the stirring shaft (302) is connected to the output shaft of the motor (301) for transmission, and the bottom of the stirring shaft (302) is equipped with stirring blades (303); It also includes a conveying assembly (5), which includes a sludge conveying pump (501), a first conveying pipe (502), and a second conveying pipe (503). The sludge conveying pump (501) is fixedly installed on the top surface of the base (101). The inlet of the sludge conveying pump (501) is connected to the bottom end of the pretreatment integrated tank assembly (2) and the sludge discharge port of the MBR membrane bioreactor module (4) through the second conveying pipe (503). The sludge conveying pump (501) is connected to the inlet of the sludge dewatering machine (6) through the first conveying pipe (502). The sludge dewatering machine (6) is located below the base (101).

2. The ship water pollution treatment equipment with pretreatment according to claim 1, characterized in that: The separation chamber (201), swirling chamber (205) and sedimentation chamber (208) are combined to form a cylindrical tank, and the separation chamber (201), swirling chamber (205) and sedimentation chamber (208) are arranged coaxially.

3. A ship water pollution treatment device with pretreatment as described in claim 1, characterized in that: The swirling cavity (205) is a conical cavity that is wider at the top and narrower at the bottom. The swirling cavity (205) is located between the separation cavity (201) and the sedimentation cavity (208). The guide plate (206) is spirally arranged and extends spirally from top to bottom along the axial direction of the swirling cavity (205).

4. A ship water pollution treatment device with pretreatment according to claim 1, characterized in that: The grid (203) is installed at an angle inside the separation chamber (201). The anti-sway plate (204) is arranged in a cross shape. There are two anti-sway plates (204), which are installed below the separation chamber (205) and inside the sedimentation chamber (208) respectively. The center intersection of the cross-shaped plate of the anti-sway plate (204) is provided with an installation hole. The stirring shaft (302) extends through the installation hole into the sedimentation chamber (208).

5. A ship water pollution treatment device with pretreatment according to claim 1, characterized in that: The oil collecting trough (207) is an annular groove arranged circumferentially along the inner wall of the top of the swirling cavity (205). One end of the oil collecting trough (207) is connected to an oil outlet pipe. The annular overflow weir (2010) is an annular protrusion arranged circumferentially along the inner wall of the top of the sedimentation cavity (208). A water collecting trough is formed between the outer side of the annular overflow weir (2010) and the inner wall of the sedimentation cavity (208). The water supply pipe (2012) is connected to the water collecting trough.

6. A ship water pollution treatment device with pretreatment according to claim 4, characterized in that: The inclined tube packing (2011) is inclined and installed inside the sedimentation chamber (208). Another anti-sway plate (204) is installed below the inclined tube packing (2011). The center point of the inclined tube packing (2011) and the anti-sway plate (204) are coaxial and have through holes. The stirring shaft (302) passes through the through holes. The stirring blade (303) at the bottom of the stirring shaft (302) is located below the anti-sway plate (204). The bottom of the sedimentation chamber (208) is welded with a sludge hopper (209).

7. A ship water pollution treatment device with pretreatment according to claim 1, characterized in that: The MBR membrane bioreactor module (4) is equipped with a rectangular box on the outside, and a curtain-type MBR membrane module is installed inside the rectangular box. The bottom of the box is equipped with a perforated aeration system, and the top is equipped with a product water outlet.

8. A ship water pollution treatment device with pretreatment according to claim 6, characterized in that: One end of the second conveying pipe (503) is connected to the bottom outlet of the sludge hopper (209) and the sludge discharge port of the MBR membrane bioreactor module (4), and the other end is connected to the feed port of the sludge conveying pump (501). One end of the first conveying pipe (502) is connected to the discharge port of the sludge conveying pump (501), and the other end is connected to the feed port of the sludge dewatering machine (6).

9. A ship water pollution treatment device with pretreatment according to claim 1, characterized in that: The sludge dewatering machine (6) is provided with a discharge port at one end away from the first conveying pipe (502), and an inclined unloading slide plate is provided at one end of the discharge port. The sludge dewatering machine (6) is located directly below the pretreatment integrated tank assembly (2) and the MBR membrane bioreactor module (4).

10. A ship water pollution treatment device with pretreatment according to claim 1, characterized in that: Support legs (102) are provided at the four corners of the bottom surface of the base (101). A surrounding guardrail (103) is welded to the top surface of the base (101). The pretreatment integrated tank assembly (2) and the MBR membrane bioreactor module (4) are located inside the guardrail (103).

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