Port treatment plant for ship ballast water and sediment

Abstract

A port treatment device for ship ballast water and sediments relates to the field of water treatment technology. The device includes a cyclone separator, a suction filter, a medium-pressure ultraviolet reactor, a sediment adjustment tank, a sludge delivery pump, a mud-water separator, and a biological effectiveness detection device for detecting plankton in the water discharged from the medium-pressure ultraviolet reactor; wherein the cyclone separator and the suction filter perform two-stage filtration on the ship ballast water in turn, the filtered water after the two-stage filtration is sent to the medium-pressure ultraviolet reactor for disinfection and then output, the filter mud is sent to the sediment adjustment tank for temporary storage, the sludge delivery pump is used to pump the sludge in the sediment adjustment tank into the mud-water separator for mud-water separation, the water output from the mud-water separator is input back into the suction filter, and the medium-pressure ultraviolet reactor is provided with a backwash port, which is connected to a backwash valve. The device provided by the present invention is suitable for being installed in ports to treat ballast water of ocean-going ships.

Description

Technical Field

[0001] The invention relates to water treatment technology, in particular to a technology of a port treatment device for ship ballast water and sediment. Background Art

[0002] In order to make the ballast water discharge of ships meet the prescribed standards and avoid the problems of ecological invasion and pathogen transfer caused by ship ballast water, ballast water treatment equipment is installed on ocean-going ships. However, the installation of ballast water treatment equipment on ships is easily restricted by factors such as routes, sea areas, space, energy consumption, cost, operation, safety and environmental protection. Therefore, there are many technical defects and risks in the ballast water treatment equipment installed on ships. In addition, the concentration of TSS particles in ballast water is high, and the size composition of particles in TSS spans a large range. TSS particles are mainly composed of inorganic matter, such as gravel, plastic, various fragments, etc., and also organic matter such as large algae and small mollusks. Organic and inorganic particles are mixed together, which is easy to block the filter, and the filtering effect is poor, and the output water body often does not meet the discharge standards. In addition, since ship equipment does not need to inactivate organisms in ballast water in a very short time, the design of biological inactivation dosage of ship equipment is often insufficient. When encountering large differences in water quality changes, it often cannot meet the discharge standards. Summary of the invention

[0003] In view of the defects existing in the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a port treatment device for ship ballast water and sediment which is not easy to be clogged and has good filtering effect, large flow, online instantaneous treatment, and does not require hydraulic retention time.

[0004] In order to solve the above technical problems, the present invention provides a port treatment device for ship ballast water and sediment, which is characterized by comprising a cyclone separator, a suction filter, a medium-pressure ultraviolet reactor, a sediment adjustment tank, a sludge delivery pump, a mud-water separator, and a bioavailability detection device for detecting plankton in the water body;

[0005] The water inlet pipe of the cyclone separator is connected to a water inlet sampling valve, the filtered water outlet of the cyclone separator is connected to the water inlet of the suction filter, and the muddy water outlet of the cyclone separator is connected to the muddy water inlet of the sediment regulating tank;

[0006] The filtered water outlet of the suction filter is connected to the water inlet of the medium-pressure ultraviolet reactor, and the muddy water outlet of the suction filter is connected to the muddy water inlet of the sediment adjustment tank;

[0007] The muddy water outlet of the sediment regulating tank is connected to the muddy water inlet of the sludge delivery pump, the muddy water outlet of the sludge delivery pump is connected to the muddy water inlet of the muddy water separator, and the water outlet of the muddy water separator is connected to the water inlet of the suction filter;

[0008] The outlet pipe of the medium-pressure ultraviolet reactor is provided with an outlet water sampling valve, and the medium-pressure ultraviolet reactor is provided with a backwash port, which is connected to a backwash valve;

[0009] The water sampling port of the bio-effectiveness detection device is connected to the water outlet pipe of the medium-pressure ultraviolet reactor;

[0010] The sludge conveying pump is provided with a pump-controlled switch for controlling the start and stop of the sludge conveying pump, and the sediment regulating tank is provided with an electronic liquid level gauge for monitoring the liquid level in its inner cavity. The pump-controlled switch is an electronic switch, and the liquid level signal output port of the electronic liquid level gauge is connected to the electrical control port of the pump-controlled switch for controlling the on and off of the pump-controlled switch.

[0011] Furthermore, the suction filter is equipped with a pleated mesh filter element.

[0012] Furthermore, a flow meter for detecting the outlet flow rate of the medium-pressure ultraviolet reactor is installed on the outlet pipe of the medium-pressure ultraviolet reactor.

[0013] The port treatment device for ship ballast water and sediment provided by the present invention adopts multi-stage solid-liquid separation and filtration enhancement technology. The first-stage filtration adopts cyclonic separation technology to filter out large-size particles, which can solve the problem that the second-stage filter is easy to clog and difficult to backwash. The second-stage filtration adopts suction filtration technology to filter out small-size particles. The filtered water after the second-stage treatment is then disinfected by ultraviolet light to disinfect and inactivate phytoplankton, zooplankton larvae and bacteria and viruses in the water body. The water output after the second-stage filtration and ultraviolet disinfection can meet the discharge standards and implement normal discharge. It has the characteristics of not easy to clog and good filtering effect. At the same time, the present invention provides a solution for sediment treatment in ballast water. After mud and water separation, it ensures that most of the ballast water can be discharged after filtration and ultraviolet inactivation, and the small amount of sludge intercepted is finally outsourced for treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a port treatment device for ship ballast water and sediment according to an embodiment of the present invention. DETAILED DESCRIPTION

[0015] The following is a further detailed description of an embodiment of the present invention in conjunction with the accompanying drawings, but this embodiment is not intended to limit the present invention. All similar structures and similar variations of the present invention should be included in the protection scope of the present invention. The commas in the present invention all represent the relationship of and.

[0016] like Figure 1As shown, a port treatment device for ship ballast water and sediment provided by an embodiment of the present invention is characterized by comprising a cyclone separator U1, a suction filter U2, a medium-pressure ultraviolet reactor U5, a sediment adjustment tank U3, a sludge delivery pump D1, a mud-water separator U4, and a biological effectiveness detection device S1 for detecting plankton in the water body;

[0017] The water inlet pipe of the cyclone separator U1 is connected to a water inlet sampling valve H1, the filtered water outlet of the cyclone separator U1 is connected to the water inlet of the suction filter U2, and the muddy water outlet of the cyclone separator U1 is connected to the muddy water inlet of the sediment regulating tank U3;

[0018] The suction filter U2 has a built-in pleated filter element, the filtered water outlet of the suction filter U2 is connected to the water inlet of the medium-pressure ultraviolet reactor U5, and the muddy water outlet of the suction filter U2 is connected to the muddy water inlet of the sediment adjustment tank U3;

[0019] The muddy water outlet of the sediment adjustment tank U3 is connected to the muddy water inlet of the sludge delivery pump D1, the muddy water outlet of the sludge delivery pump D1 is connected to the muddy water inlet of the muddy water separator U4, and the water outlet of the muddy water separator U4 is connected to the water inlet of the suction filter U2;

[0020] The outlet pipe of the medium-pressure ultraviolet reactor U5 is equipped with an outlet water sampling valve H2 and a flow meter P1 for detecting the outlet water flow of the medium-pressure ultraviolet reactor. The medium-pressure ultraviolet reactor U5 is provided with a backwash port, which is connected to a backwash valve H3.

[0021] The water sampling port of the bio-effectiveness detection device S1 is connected to the water outlet pipe of the medium-pressure ultraviolet reactor U5;

[0022] The sludge conveying pump D1 is provided with a pump-controlled switch (not shown in the figure) for controlling the start and stop of the sludge conveying pump, and the sediment regulating tank U3 is provided with an electronic liquid level meter (not shown in the figure) for monitoring the liquid level in its inner cavity. The pump-controlled switch is an electronic switch, and the liquid level signal output port of the electronic liquid level meter is connected to the electrical control port of the pump-controlled switch for controlling the on and off of the pump-controlled switch.

[0023] In the embodiment of the present invention, the cyclone separator, suction filter, medium-pressure ultraviolet reactor, mud-water separator, biological effectiveness detection equipment, and electronic liquid level meter are all existing technologies, among which the electronic liquid level meter adopts an ultrasonic liquid level meter; the mud-water separator adopts filter bag filtration, the filter bag is made of PP material, and the filter pore size is 10-50 microns. The filtration accuracy is adjusted according to different seawater characteristics; the filter bag can be reused after cleaning; the mud-water separator is equipped with a pressure sensor, and the system prompts to replace the filter bag after reaching the preset pressure value; the medium-pressure ultraviolet reactor is equipped with a high-dose medium-pressure ultraviolet lamp to ensure qualified discharge after one treatment; the high-efficiency ultraviolet reactor is equipped with advanced ultrasonic cleaning technology to thoroughly clean the quartz sleeve of the ultraviolet lamp to ensure high transmittance of ultraviolet light.

[0024] The embodiment of the present invention is suitable for installation in ports to treat ballast water of ocean-going ships, and its working method is as follows:

[0025] When treating the ship's ballast water, connect the ship's ballast water pumping pipeline to the water inlet pipe of the cyclone separator U1, open the inlet sampling valve H1 and the outlet sampling valve H2, and close the backwash valve H3;

[0026] The ballast water mixed with solid sediments enters the cyclone separator through the water inlet sampling valve H1 for primary filtration. The cyclone separator is used to filter out particles with a particle size of more than 100 microns. After the solid-liquid two-phase mixture enters the cyclone separator, under the action of the rotating centrifugal force of the cyclone separator, the heavy phase material (particles with larger density and particle size) is separated and sent to the sediment adjustment tank U3, and the liquid flow carrying a small amount of light phase material (particles with smaller density and particle size) is sent to the suction filter U2 for secondary filtration;

[0027] The filtration accuracy of the suction filter U2 is higher than that of the cyclone separator. It is used to filter out particles with a particle size of more than 40 microns. At this accuracy, it can achieve a 96% zooplankton removal rate (>50μm), a 50% phytoplankton removal rate (10-50μm), and a 98% TSS removal rate (influent water quality 2500ppm); the long suction nozzle of the suction filter can remove fine particles attached to the inner surface of the filter, and the short suction nozzle can discharge large particles, which can effectively avoid filter blockage; the built-in pleated filter element of the suction filter greatly increases the filtration area, and the filtration interception area is large. The filter uses suction rods of different lengths to discharge particles of different sizes; the filter is equipped with a filter high-pressure backwash pump, which is easy to backwash and clean, has strong regeneration ability, can effectively remove suspended matter and particles, has high filtration accuracy, good purification effect, can improve the UV transmittance of the effluent, ensure the normal operation of the medium-pressure UV reactor, and completely solve the problem of unsuccessful filter backwashing.

[0028] The filtered water after being filtered by the sucking filter is sent to the medium-pressure ultraviolet reactor U5 for ultraviolet disinfection. Ultraviolet disinfection is a purely physical disinfection, which is used to disinfect and inactivate phytoplankton, zooplankton larvae, bacteria and viruses in the water body. The disinfected effluent is discharged normally through the effluent sampling valve H2; the flow meter P1 is used to control the opening of the regulating valve during the self-cleaning process of the sucking filter to increase the back pressure to enhance the self-cleaning effect of the sucking filter.

[0029] The bioavailability detection device S1 can be used to detect whether the number of plankton in the outlet water of the medium-pressure ultraviolet reactor meets the standard.

[0030] The sludge filtered by the suction filter is sent to the sediment regulating tank U3. The ultrasonic level meter in the sediment regulating tank detects the liquid level in the tank in real time. When the liquid level in the tank reaches the preset upper limit of the liquid level, the ultrasonic level meter outputs a corresponding signal to control the sludge delivery pump D1 to start, and the muddy water in the sediment regulating tank is pumped into the mud-water separator U4. When the liquid level in the tank reaches the preset lower limit of the liquid level, the ultrasonic level meter outputs a corresponding signal to control the sludge delivery pump D1 to stop pumping muddy water.

[0031] The mud-water separator U4 separates the mud and water, and the separated sewage is returned to the suction filter for circulation treatment. The sludge intercepted after separation is temporarily stored and then treated regularly.

[0032] When cleaning is required, connect the cleaning water delivery pipeline (such as a tap water pipe) to the backwash valve H3, open the backwash valve H3, and close the outlet water sampling valve H2;

[0033] The flow direction of the cleaning water is opposite to that of the treated water. The high-pressure cleaning water first enters the medium-pressure ultraviolet reactor U5 through the backwash valve H3, then flows out from the water inlet of the medium-pressure ultraviolet reactor U5, enters the sucking filter U2 through the filtered water outlet of the sucking filter U2, and then flows out from the mud and water outlet of the sucking filter U2, flows through the sediment adjustment tank U3, the sludge delivery pump D1, and the mud and water separator U4 in turn, and then returns to the sucking filter U2 from the water inlet of the sucking filter U2. During the flow process, the high-pressure cleaning water reversely flushes the ultraviolet reactor U5, the sucking filter U2, the sediment adjustment tank U3, the sludge delivery pump D1, and the mud and water separator U4 respectively. By regularly reverse flushing each device, the blockage of each device can be effectively avoided.

Claims

1. A port treatment device for ship ballast water and sediment, characterized in that: It includes cyclone separators, suction filters, medium-pressure UV reactors, sediment conditioning tanks, sludge delivery pumps, mud-water separators, and bioavailability testing equipment for detecting plankton in water bodies; The water inlet pipe of the cyclone separator is connected to a water inlet sampling valve, the filtered water outlet of the cyclone separator is connected to the water inlet of the suction filter, and the muddy water outlet of the cyclone separator is connected to the muddy water inlet of the sediment regulating tank; The filtered water outlet of the suction filter is connected to the water inlet of the medium-pressure ultraviolet reactor, and the muddy water outlet of the suction filter is connected to the muddy water inlet of the sediment adjustment tank; The muddy water outlet of the sediment regulating tank is connected to the muddy water inlet of the sludge delivery pump, the muddy water outlet of the sludge delivery pump is connected to the muddy water inlet of the muddy water separator, and the water outlet of the muddy water separator is connected to the water inlet of the suction filter; The outlet pipe of the medium-pressure ultraviolet reactor is provided with an outlet water sampling valve, and the medium-pressure ultraviolet reactor is provided with a backwash port, which is connected to a backwash valve; The water sampling port of the bio-effectiveness detection device is connected to the water outlet pipe of the medium-pressure ultraviolet reactor; The sludge conveying pump is provided with a pump control switch for controlling the start and stop of the sludge conveying pump, and the sediment regulating tank is provided with an electronic liquid level gauge for monitoring the liquid level in its inner cavity. The pump control switch is an electronic switch, and the liquid level signal output port of the electronic liquid level gauge is connected to the electrical control port of the pump control switch to control the on and off of the pump control switch; The suction filter is internally provided with a pleated mesh filter element.

2. The port treatment device for ship ballast water and sediment according to claim 1, characterized in that: The outlet pipe of the medium-pressure ultraviolet reactor is provided with a flow meter for detecting the outlet flow of the medium-pressure ultraviolet reactor.

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