Ballast water TRO neutralization treatment system and ship

Abstract

The present invention provides a ballast water TRO neutralization treatment system, comprising a ballast tank, a ballast pump, a neutralizer storage tank, a control system, a fresh water pipeline, a neutralizer solution tank, a neutralizer distribution device, a neutralizer dosing pump, a control valve, a discharge pipeline and a neutralization dosing pipeline; the outlet of the ballast tank is connected to the outside of the ship through the discharge pipeline, the ballast pump is arranged on the discharge pipeline, the outlet of the neutralizer storage tank is connected to the neutralizer inlet of the neutralizer solution tank through the neutralizer distribution device, the outlet of the fresh water pipeline is connected to the fresh water inlet of the neutralizer solution tank, the control valve is arranged on the fresh water pipeline, the neutralizer dosing pump is arranged on the neutralization dosing pipeline, the outlet of the neutralizer solution tank is connected to the inlet of the neutralizer dosing pump, and the outlet of the neutralizer dosing pump is connected to the discharge pipeline. The present invention also provides a ship.

Description

Technical Field

[0001] The present invention relates to the technical field of ships, and in particular to a ballast water TRO neutralization treatment system and a ship having the system. Background Art

[0002] The International Maritime Organization (IMO) divides the treatment methods of ballast water management systems into two categories: methods using active substances and methods not using active substances. Active substances refer to a substance or organism, including viruses or fungi that have general or special effects on harmful aquatic organisms and pathogens, which can kill target organisms in seawater. The treatment method using active substances is mainly to produce or directly prepare one or more specific active substances through physical or chemical methods, and then inject them into the ballast water, using the inactivation and sterilization ability of the active substances to achieve ballast water treatment, thereby meeting the discharge standards of the Ballast Water Convention. The dosage of active substances in the ballast water management system is generally measured in terms of total residual oxidant (TRO) concentration. At present, IMO and the United States Coast Guard (USCG) have put forward certification requirements for the dosing concentration of ballast water management systems using active substances. The dosing concentration of ballast water management systems using active substances must be formally approved through land-based tests and actual ship tests in accordance with the requirements of IMO BWMSCODE (International Maritime Organization Ballast Water Management System Approval Rules) and USCG Final Rule CFR 162.060 (U.S. Coast Guard Final Rule 162.060). In addition, in order to prevent the potential environmental risks of TRO to the receiving water body when the treated ballast water is discharged, IMO and the U.S. Environmental Protection Agency (EPA) both require that the TRO concentration in the discharged ballast water should be less than 0.1 mg / L. In order to meet this discharge requirement, all ballast water management systems using active substances need to be equipped with a neutralization device, which adds a neutralizer to the discharged water to react with TRO, and sets a TRO detector at the discharge point to monitor the TRO concentration in the discharged water in real time to ensure that the TRO concentration of the ballast water after neutralization is less than 0.1 mg / L.

[0003] The neutralization treatment device currently used in the ballast water management system mainly consists of the following three components: neutralizer preparation and dosing module, control module and TRO monitoring module (invention patent 201410201450.7). The neutralizer preparation and dosing module is mainly used for the preparation and dosing of the neutralizer solution. The control module mainly controls the normal operation and operation of the entire neutralization treatment device through a programmable controller and a human-machine interface. The TRO monitoring module contains 1 to 2 TRO analyzers (or residual chlorine analyzers) for real-time monitoring of the TRO concentration of the discharged ballast water on the outside of the discharge side (must be used) and the TRO concentration before neutralization treatment (if necessary), to ensure that the TRO concentration in the discharged ballast water after neutralization treatment is less than the discharge standards specified by IMO and port countries. The TRO analyzer used in the neutralization treatment device mainly uses DPD colorimetry, current method and redox potential method to measure the TRO concentration. The instrument has high sensitivity, complex internal structure and high integration. The environmental conditions on board ships are quite challenging, such as vibration, tilt, high humidity, high temperature, low temperature and electromagnetic interference, which have a great impact on the stability and reliability of TRO analyzer operation. Generally, TRO analyzers also require crew members to calibrate or replace reagents regularly. According to feedback from ship owners and crew members, TRO analyzers have become an important shackle affecting the normal operation of ballast water management systems.

[0004] In addition, the layout and water quality of the ballast piping system on ships are also complex and changeable. In addition to the common arrangement of the ballast piping system below the cabin steel plate, for some specially designed ships such as oil tankers and chemical tankers, all or part of the ballast piping system will be submerged below the water surface. If the installation problem of the TRO analyzer cannot be solved, the market competitiveness of the ballast water treatment system using active substances will be seriously limited. As for the tank stripping and discharge piping system in the ballast piping system, because it is used to discharge the ballast tank bilge water, after long-term operation, the bilge water discharged by the tank stripping piping system contains a certain amount of sediment such as silt, which is very easy to block the sampling pipeline of the TRO analyzer, or cause the failure of the internal measuring components of the TRO analyzer, so that the TRO analyzer cannot work normally, and then cause the failure of the entire set of neutralization treatment equipment. Summary of the invention

[0005] The purpose of the present invention is to provide a ballast water TRO neutralization treatment system, which aims to solve the shortcomings of the above-mentioned background technology, optimize the process flow and control logic, cancel the TRO detection module in the neutralization treatment system, and at the same time achieve a good neutralization effect, ensuring that the TRO concentration in the discharged ballast water after neutralization treatment is far less than the discharge limit, and meeting the discharge requirements of IMO and relevant port countries.

[0006] The present invention provides a ballast water TRO neutralization treatment system, comprising a ballast tank, a ballast pump, a neutralizer storage tank, a control system, a fresh water pipeline, a neutralizer solution tank, a neutralizer distribution device, a neutralizer dosing pump, a control valve, a discharge pipeline and a neutralization dosing pipeline, wherein the neutralizer storage tank stores solid neutralizer;

[0007] The outlet of the ballast tank is connected to the outside of the ship through the discharge pipeline, the ballast pump is arranged on the discharge pipeline, the outlet of the neutralizer storage tank is connected to the neutralizer inlet of the neutralizing solution tank through the neutralizer distribution device, the outlet of the fresh water pipeline is connected to the fresh water inlet of the neutralizing solution tank, the control valve is arranged on the fresh water pipeline, the neutralizer dosing pump is arranged on the neutralization dosing pipeline, the outlet of the neutralization solution tank is connected to the inlet of the neutralizer dosing pump, the outlet of the neutralizer dosing pump is connected to the discharge pipeline, and the control system is simultaneously connected to the neutralizer dosing pump and the control valve signal.

[0008] Furthermore, it also includes a mass sensor, which is arranged on the neutralizer storage tank, and the control system is also connected to the mass sensor signal at the same time.

[0009] Furthermore, it also includes a first liquid level meter, which is arranged on the neutralization solution tank, and the control system is also connected to the signal of the first liquid level meter.

[0010] Furthermore, it also includes a first flow meter and a second flow meter, the first flow meter is arranged on the discharge pipeline, and the second flow meter is arranged on the neutralization and dosing pipeline, and the control system is also connected to the signals of the first flow meter and the second flow meter at the same time.

[0011] Furthermore, the neutralizer dosing pump is connected to a variable frequency motor, and the control system is also connected to the variable frequency motor signal at the same time.

[0012] Furthermore, it also includes a stirrer, which is arranged in the neutralization solution tank, and the stirrer is connected to a stirring motor, and the control system is also connected to the stirring motor signal at the same time.

[0013] Furthermore, it also includes a second liquid level gauge, which is arranged on the ballast tank, and the control system is also connected to the signal of the second liquid level gauge.

[0014] Furthermore, it also includes a second liquid level gauge and a liquid level telemetry system, the second liquid level gauge is arranged on the ballast tank, the liquid level telemetry system is connected to the second liquid level gauge signal, and the control system is also connected to the liquid level telemetry system signal at the same time.

[0015] Furthermore, a salinity meter, a thermometer, a dissolved oxygen meter and a pH meter are provided on the discharge pipeline before the node where the neutralization and dosing pipeline is connected to the discharge pipeline, and the control system is also simultaneously connected to the signals of the salinity meter, the thermometer, the dissolved oxygen meter and the pH meter.

[0016] The present invention also provides a ship, comprising the ballast water TRO neutralization treatment system described above.

[0017] The ballast water TRO neutralization treatment system provided by the present invention accurately controls the concentration and dosage of the neutralizer solution by calculation, ensuring that the TRO concentration of the discharged ballast water after neutralization treatment is far less than 0.1 mg / L, meeting the IMO and port state discharge requirements for TRO. Therefore, there is no need to set up a TRO sampling point and install a TRO analyzer at the overboard discharge point for real-time monitoring of the TRO concentration of the discharged ballast water, which greatly reduces the equipment cost of the entire neutralization treatment system and improves the stability and reliability of the system. At the same time, the neutralization treatment system realizes the automatic preparation and automatic dosage of the neutralizer solution, reduces the operation of personnel, and meets the automated operation requirements of the ship's ballast water treatment system. Moreover, the neutralization treatment system optimizes the control method of the neutralization treatment, and the appropriate concentration and dosage of the neutralizer solution can be determined by the relevant discharge parameters, avoiding excessive consumption of the neutralizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the ballast water TRO neutralization treatment system in the first embodiment of the present invention.

[0019] Figure 2 It is a schematic structural diagram of a ballast water TRO neutralization treatment system in a second embodiment of the present invention.

[0020] Figure 3 It is a schematic structural diagram of a ballast water TRO neutralization treatment system in a third embodiment of the present invention. DETAILED DESCRIPTION

[0021] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present invention are used to distinguish similar objects and are not necessarily used to describe a particular sequence or order.

[0023] First embodiment

[0024] like Figure 1As shown, the ballast water TRO (total residual oxidant) neutralization treatment system provided by the first embodiment of the present invention includes a ballast tank 1, a ballast pump 2, a neutralizer storage tank 4, a control system 5, a fresh water pipeline 6, a neutralization solution tank 7, a neutralizer distribution device 8, a neutralizer dosing pump 10, a control valve 12, a discharge pipeline 16 and a neutralization dosing pipeline 17, and the neutralizer storage tank 4 stores solid neutralizer;

[0025] The outlet of the ballast tank 1 is connected to the overboard through a discharge pipeline 16, the ballast pump 2 is arranged on the discharge pipeline 16, the outlet of the neutralizer storage tank 4 is connected to the neutralizer inlet 71 of the neutralizing solution tank 7 through the neutralizer distribution device 8, the outlet of the fresh water pipeline 6 is connected to the fresh water inlet 72 of the neutralizing solution tank 7, the control valve 12 is arranged on the fresh water pipeline 6, the neutralizer dosing pump 10 is arranged on the neutralization dosing pipeline 17, the outlet of the neutralization solution tank 7 is connected to the inlet of the neutralizer dosing pump 10, the outlet of the neutralizer dosing pump 10 is connected to the discharge pipeline 16, and the control system 5 is simultaneously connected to the neutralizer dosing pump 10 and the control valve 12 signals.

[0026] Furthermore, the ballast water TRO neutralization treatment system further comprises a quality sensor 11 , which is disposed on the neutralizer storage tank 4 , and the control system 5 is also connected to the quality sensor 11 by signal.

[0027] Furthermore, the ballast water TRO neutralization treatment system further comprises a first liquid level gauge 13 , which is disposed on the neutralization solution tank 7 , and the control system 5 is also connected to the first liquid level gauge 13 by signal.

[0028] Furthermore, the ballast water TRO neutralization treatment system also includes a first flow meter 14 and a second flow meter 15. The first flow meter 14 is arranged on the discharge pipeline 16, and the second flow meter 15 is arranged on the neutralization and dosing pipeline 17. The control system 5 is also connected to the first flow meter 14 and the second flow meter 15 signals at the same time.

[0029] Furthermore, the ballast water TRO neutralization treatment system also includes an agitator 9 , which is disposed in the neutralization solution tank 7 , and is connected to a stirring motor 91 , and the control system 5 is also connected to the stirring motor 91 by signal.

[0030] Specifically, the neutralizer storage tank 4 is used to store the solid neutralizer, and its matching neutralizer distribution device 8 is used to add the solid neutralizer to the neutralization solution tank 7. The top of the neutralization solution tank 7 is provided with a neutralizer inlet 71, and the neutralizer is transported to the neutralization solution tank 7 from the neutralizer inlet 71 through the neutralizer distribution device 8. The top of the neutralization solution tank 7 is also provided with a fresh water inlet 72, and the fresh water is transported to the neutralization solution tank 7 from the fresh water inlet 72 through the fresh water pipeline 6. The neutralization solution tank 7 is mainly used to dissolve the solid neutralizer in fresh water and mix and prepare it through the agitator 9, and store the neutralizer solution. The main function of the neutralizer dosing pump 10 is to inject the neutralizer solution into the ballast water discharge pipeline 16, and the neutralizer solution reacts with the TRO in the ballast water. The mass sensor 11 on the neutralizer storage tank 4 is used to determine the amount of the prepared neutralizer to be added, the first liquid level meter 13 on the neutralization solution tank 7 determines the volume of the neutralizer solution by monitoring the liquid level, and the second flow meter 15 on the neutralization dosing pipeline 17 is used to determine the dosing flow of the neutralizer dosing pump 10. The control system 5 determines the appropriate concentration, volume and dosing flow of the neutralizer solution through program calculation using the built-in control method according to the relevant parameters of the unloading process, and realizes the automatic operation of the entire neutralization treatment system by monitoring the relevant sensors and controlling the start and stop of the relevant equipment and valves.

[0031] Furthermore, the ballast water TRO neutralization treatment system also includes a second liquid level gauge 31, which is arranged on the ballast tank 1. The control system 5 is also connected to the second liquid level gauge 31 by signal, and the second liquid level gauge 31 is used to calculate the volume of the ballast water in the ballast tank 1. Since the ballast water in the ballast tank 1 is not necessarily full, the capacity of the ballast tank 1 cannot be directly used as the volume of the ballast water, and the second liquid level gauge 31 is required to calculate the volume of the ballast water in the ballast tank 1. It should be noted that when the ballast tank 1 is of a regular shape (such as a cylindrical shape, a rectangular shape, etc.), the second liquid level gauge 31 can be used to measure the liquid level of the ballast water in the ballast tank 1, thereby calculating the volume of the ballast water.

[0032] Furthermore, the control system 5 is used to:

[0033] Obtaining the TRO concentration and volume of the ballast water in the ballast tank 1, and calculating the required concentration and volume of the neutralizer solution according to the TRO concentration and volume of the ballast water;

[0034] Controlling the amount of neutralizer and fresh water added according to the calculated concentration and volume of the neutralizer solution;

[0035] The dosing flow rate of the neutralizer solution is controlled according to the discharge flow rate of the ballast water and the TRO concentration of the ballast water.

[0036] Furthermore, the method for obtaining the TRO concentration of the ballast water in the ballast tank 1 includes:

[0037] A first database is pre-set in the control system 5, in which the TRO concentration of the ballast water decays with the residence time of the ballast water in the ballast tank 1;

[0038] Obtaining the residence time of the ballast water in the ballast tank 1 according to the ballast time and the discharge time of the ballast water;

[0039] According to the residence time of the ballast water in the ballast tank 1, the corresponding TRO concentration of the ballast water is obtained by querying the first database.

[0040] Generally, when active substances are used to treat ballast water in the ballast tank 1, the residual concentration (TRO concentration) of the active substances after the reaction with harmful organisms in the ballast water is related to the salinity, temperature, dissolved oxygen, pH value of the ballast water and the residence time of the ballast water in the ballast tank 1 (i.e., the reaction time of the active substances with harmful organisms in the ballast water). However, according to the test results and actual operation conditions, it is considered that: 1. The changes in the salinity, temperature, dissolved oxygen and pH value of the ballast water have little effect on the TRO concentration of the ballast water; 2. The salinity, temperature, dissolved oxygen and pH value of the ballast water have little effect on the TRO concentration of the ballast water. The temperature, dissolved oxygen and pH value do not change much during actual ship operation. When designing the first database, the design margin is fully considered. Therefore, the relationship between the TRO concentration of ballast water and the salinity, temperature, dissolved oxygen, pH value of the ballast water and the residence time of the ballast water in the ballast tank 1 can be simplified to the relationship between the TRO concentration of ballast water and the residence time of the ballast water in the ballast tank 1. At the same time, combined with mathematical statistics and curve fitting, a first database is established in the control system 5 to show that the TRO concentration of ballast water decays with the residence time of the ballast water in the ballast tank 1.

[0041] Since the entire ballast water treatment system must be started when treating ballast water (including ballasting and discharging), the time will be recorded as long as the ballast water treatment system is started, so the ballast time and discharging time of the ballast water can be used to obtain the residence time of the ballast water in the ballast tank 1. According to the residence time of the ballast water in the ballast tank 1, combined with the first database, the TRO concentration of the ballast water corresponding to it can be obtained, and the volume of the ballast water can be obtained by using the second liquid level meter 31; using the computing power of the hardware in the control system 5, combined with the chemical reaction mechanism of the redox reaction of the neutralizer and TRO and considering the law of conservation of mass, and fully considering the design margin, the concentration and volume of the neutralizer solution are finally calculated and determined. At the same time, the control system 5 automatically controls the concentration and volume of the neutralizer solution by automatically controlling the amount of neutralizer added and the volume of dissolved water. And according to the discharge flow rate of the ballast water and the TRO concentration of the ballast water, the control system 5 calls the corresponding operation function to determine the dosing flow rate of the neutralizer solution to ensure that the TRO in the discharge water is completely and fully neutralized and the TRO concentration in the discharge water is far less than 0.1 mg / L.

[0042] Furthermore, the neutralizer dosing pump 10 is connected to a variable frequency motor 101, and the control system 5 is also connected to the variable frequency motor 101 by signal. According to the real-time discharge flow of the ballast water in the discharge pipeline 16, the frequency of the variable frequency motor 101 is controlled to realize automatic adjustment of the dosing flow of the neutralizer solution.

[0043] The control valve 12 can be automatically opened or closed under the control of the control system 5 , so as to control the amount of fresh water entering the neutralization solution tank 7 .

[0044] The working process of the ballast water TRO neutralization treatment system of this embodiment is as follows:

[0045] 1. Preparation of neutralizer solution before neutralization treatment: The control system 5 automatically obtains the residence time of the ballast water in the ballast tank 1, and calculates the TRO concentration of the ballast water according to the residence time of the ballast water in the ballast tank 1, and uses the second liquid level gauge 31 to obtain the volume of the ballast water (of course, the crew can also input the discharge-related parameters, such as the residence time of the ballast water in the ballast tank 1, the volume of the ballast water, the discharge flow rate, etc., in the human-machine interface of the control system 5). The control system 5 determines the amount of the neutralizer added and the amount of fresh water added according to the built-in control method, thereby determining the volume and concentration of the prepared neutralizer solution. At the same time, the neutralizer distribution device 8 is started, and the control valve 12 on the fresh water pipeline 6 is opened to prepare the neutralizer solution. The concentration and volume of the neutralizer solution are determined by monitoring the weight of the neutralizer storage tank 4 and the liquid level of the neutralizer solution tank 7. After reaching the target concentration and volume, the neutralizer distribution device 8 and the control valve 12 are closed, and the agitator 9 is closed after running for a certain period of time, and the automatic preparation of the neutralizer solution is completed.

[0046] 2. Neutralization of discharge water: When discharge begins, the ballast pump 2 discharges the ballast water in the ballast tank 1 to the side of the ship. The crew starts the neutralization treatment system on the human-machine interface of the control system 5. At this time, the neutralizer dosing pump 10 starts to add the neutralizer solution. At the same time, the control system 5 monitors the discharge flow rate in real time through the first flow meter 14 set on the discharge pipeline 16, and the second flow meter 15 on the neutralization dosing pipeline 17 monitors the dosing flow rate in real time. The control system 5 automatically adjusts the frequency of the variable frequency motor 101 on the neutralizer dosing pump 10 according to the real-time discharge flow rate of the discharge pipeline 16, thereby realizing automatic adjustment of the dosing flow rate of the neutralizer solution, and controlling the dosing flow rate of the neutralizer solution at the target flow rate, ensuring that the TRO in the discharge water is fully and effectively neutralized, and ensuring that the TRO concentration in the discharge water after neutralization treatment is far less than 0.1 mg / L, meeting the emission standards of IMO and port countries. The entire neutralization process does not require the use of a TRO analyzer for control, which greatly simplifies the neutralization process and improves the reliability of the entire neutralization system.

[0047] The effects of the present invention are:

[0048] 1. The present invention realizes the automatic preparation and automatic dosing of the neutralizer solution, reduces the human operation, and meets the automatic operation requirements of the ship ballast water treatment system;

[0049] 2. The present invention optimizes the control method of the neutralization treatment and can determine the appropriate concentration and dosage of the neutralizer solution through relevant loading parameters, thereby avoiding excessive consumption of the neutralizer;

[0050] 3. The present invention accurately controls the concentration and dosage of the neutralizer solution by calculation, ensuring that the TRO concentration of the discharged ballast water after neutralization treatment is much less than 0.1 mg / L, meeting the TRO discharge requirements of IMO and port countries. Therefore, it is not necessary to set a TRO sampling point at the overboard discharge point and install a TRO analyzer for real-time monitoring of the TRO concentration of the discharged ballast water, which greatly reduces the equipment cost of the entire neutralization treatment system and improves the stability and reliability of the system.

[0051] 4. The present invention can ensure that the ballast water after neutralization treatment meets the TRO discharge requirements of IMO and port countries without the need for a TRO analyzer, greatly improving the ship applicability and market competitiveness of the ballast water treatment system equipped with the neutralization treatment system.

[0052] Examples:

[0053] 1. The ballast pump and overboard discharge point of the entire ballast piping system of a chemical tanker are all submerged below the water surface. When discharging, the treated ballast water in the ballast tank is directly discharged overboard through the stripping pump. It is impossible to install a suitable TRO analyzer or set a TRO sampling point for TRO monitoring at the overboard discharge point. After adopting the neutralization treatment system of the present invention, by obtaining information such as the ballast pump flow rate and the residence time of the treated ballast water in the ballast tank, a neutralizer solution of appropriate concentration is automatically prepared. After discharging begins, the control system automatically adjusts the dosing flow rate of the neutralizer dosing pump according to the discharge flow rate, ensuring that the TRO in the discharge water is fully and effectively neutralized, meeting the TRO discharge requirements of IMO and port countries.

[0054] 2. When a bulk carrier is stripping and discharging, the bilge water in the ballast tank is directly discharged overboard through the stripping pump. After adopting the neutralization treatment system of the present invention, by obtaining information such as the ballast pump flow rate and the residence time of the treated ballast water in the ballast tank, a neutralizer solution of appropriate concentration is automatically prepared. After the stripping and discharging begins, the control system will automatically adjust the dosing flow rate of the neutralizer dosing pump to ensure that the TRO of the stripping and discharging water is fully and effectively neutralized, meeting the TRO emission requirements of IMO and port countries. The entire stripping and discharging neutralization treatment system does not need to install a TRO analyzer at the discharging point or set a TRO sampling point for TRO monitoring, avoiding the adverse effects of mud and sediment in the bilge water on the TRO analyzer.

[0055] Second embodiment

[0056] like Figure 2 As shown, the ballast water TRO neutralization treatment system provided by the second embodiment of the present invention is substantially the same as that of the first embodiment, except that the method and device for obtaining the ballast water volume are different.

[0057] Specifically, in this embodiment, the ballast water TRO neutralization treatment system also includes a second liquid level gauge 31 and a liquid level telemetry system 32. The second liquid level gauge 31 is arranged on the ballast tank 1. The liquid level telemetry system 32 is connected to the second liquid level gauge 31 by signal. The control system 5 is also connected to the liquid level telemetry system 32 by signal at the same time.

[0058] Due to the different spatial designs of different ships, the shape of the ballast tank 1 on some ships is irregular, so the volume of the ballast water in the ballast tank 1 cannot be directly calculated by the second liquid level gauge 31. The liquid level telemetry system 32 is provided with an algorithm for converting the liquid level of the ballast tank 1 into the volume of the ballast water. Therefore, the volume of the ballast water in the ballast tank 1 can be measured by the second liquid level gauge 31 and the liquid level telemetry system 32. The other settings of this embodiment are the same as those of the first embodiment described above, and are not repeated here.

[0059] Third embodiment

[0060] like Figure 3 As shown, the ballast water TRO neutralization treatment system provided by the third embodiment of the present invention is substantially the same as that of the first embodiment, except that a salinity meter 21, a thermometer 22, a dissolved oxygen meter 23 and a pH meter 24 are further provided in this embodiment, and the method for obtaining the TRO concentration of the ballast water in the ballast tank 1 is different.

[0061] Specifically, in this embodiment, a salinity meter 21, a thermometer 22, a dissolved oxygen meter 23 and a pH meter 24 are provided on the discharge pipeline 16 before the node where the neutralization and dosing pipeline 17 is connected to the discharge pipeline 16, and the control system 5 is also connected to the salinity meter 21, the thermometer 22, the dissolved oxygen meter 23 and the pH meter 24 signals at the same time.

[0062] In this embodiment, the method for obtaining the TRO concentration of the ballast water in the ballast tank 1 includes:

[0063] A second database related to the TRO concentration of the ballast water, the salinity, temperature, dissolved oxygen, pH of the ballast water, and the residence time of the ballast water in the ballast tank 1 is pre-set in the control system 5;

[0064] Obtaining the residence time of the ballast water in the ballast tank 1 according to the ballast time and the discharge time of the ballast water;

[0065] According to the detected salinity, temperature, dissolved oxygen, pH value of the ballast water and the residence time of the ballast water in the ballast tank 1, the corresponding TRO concentration of the ballast water is obtained by querying the second database.

[0066] The other configurations of this embodiment are the same as those of the first embodiment described above and will not be described in detail here.

[0067] It should be noted that, compared with the first embodiment, the advantages and disadvantages of this embodiment are as follows: Advantages: Compared with the first embodiment, this embodiment is more accurate and suitable for ballast water of various water quality conditions (including ballast water of different salinity, temperature, dissolved oxygen, and pH value); Disadvantages: Compared with the first embodiment, the use effects of this embodiment and the first embodiment are the same in waters with little difference in water quality, but this embodiment is more complicated than the first embodiment, has more components and higher cost.

[0068] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A ballast water TRO neutralization treatment system, characterized in that: The invention comprises a ballast tank (1), a ballast pump (2), a neutralizer storage tank (4), a control system (5), a fresh water pipeline (6), a neutralizing solution tank (7), a neutralizer distribution device (8), a neutralizer dosing pump (10), a control valve (12), a discharge pipeline (16) and a neutralization dosing pipeline (17), wherein the neutralizer storage tank (4) stores solid neutralizer; The outlet of the ballast tank (1) is connected to the outside of the ship through the discharge pipeline (16); the ballast pump (2) is arranged on the discharge pipeline (16); the outlet of the neutralizer storage tank (4) is connected to the neutralizer inlet (71) of the neutralizing solution tank (7) through the neutralizer dispensing device (8); the outlet of the fresh water pipeline (6) is connected to the fresh water inlet (72) of the neutralizing solution tank (7); the control valve (12) is arranged on the fresh water pipeline (6); the neutralizer dosing pump (10) is arranged on the neutralization dosing pipeline (17); the outlet of the neutralization solution tank (7) is connected to the inlet of the neutralizer dosing pump (10); the outlet of the neutralizer dosing pump (10) is connected to the discharge pipeline (16); and the control system (5) is simultaneously connected to the neutralizer dosing pump (10) and the control valve (12) by signal; The control system (5) is used for: Obtaining the TRO concentration and volume of the ballast water in the ballast tank (1), and calculating the required concentration and volume of the neutralizer solution according to the TRO concentration and volume of the ballast water; Controlling the amount of neutralizer and fresh water added according to the calculated concentration and volume of the neutralizer solution; Control the dosing flow of the neutralizer solution according to the discharge flow of the ballast water and the TRO concentration of the ballast water; The method for obtaining the TRO concentration of the ballast water in the ballast tank (1) comprises: A first database is pre-set in the control system (5) for indicating that the TRO concentration of the ballast water decays with the residence time of the ballast water in the ballast tank (1); Obtaining the residence time of the ballast water in the ballast tank (1) according to the ballast time and the discharge time of the ballast water; According to the residence time of the ballast water in the ballast tank (1), the corresponding TRO concentration of the ballast water is obtained by querying the first database.

2. The ballast water TRO neutralization treatment system according to claim 1, characterized in that: It also comprises a mass sensor (11), wherein the mass sensor (11) is arranged on the neutralizer storage tank (4), and the control system (5) is also simultaneously connected to the mass sensor (11) by signal.

3. The ballast water TRO neutralization treatment system according to claim 1, characterized in that: It also comprises a first liquid level meter (13), which is arranged on the neutralization solution tank (7), and the control system (5) is also connected to the first liquid level meter (13) by signal.

4. The ballast water TRO neutralization treatment system according to claim 1, characterized in that: It also includes a first flow meter (14) and a second flow meter (15), wherein the first flow meter (14) is arranged on the load-discharging pipeline (16), and the second flow meter (15) is arranged on the neutralization and dosing pipeline (17), and the control system (5) is also simultaneously connected to the first flow meter (14) and the second flow meter (15) by signals.

5. The ballast water TRO neutralization treatment system according to claim 1, characterized in that: The neutralizer dosing pump (10) is connected to a variable frequency motor (101), and the control system (5) is also connected to the variable frequency motor (101) by signal.

6. The ballast water TRO neutralization treatment system according to claim 1, characterized in that: It also includes a stirrer (9), which is arranged in the neutralization solution tank (7). The stirrer (9) is connected to a stirring motor (91), and the control system (5) is also connected to the stirring motor (91) by signal.

7. The ballast water TRO neutralization treatment system according to claim 1, characterized in that: It also comprises a second liquid level gauge (31), which is arranged on the ballast tank (1), and the control system (5) is also connected to the second liquid level gauge (31) by signal.

8. The ballast water TRO neutralization treatment system according to claim 1, characterized in that: It also includes a second liquid level meter (31) and a liquid level telemetry system (32), wherein the second liquid level meter (31) is arranged on the ballast tank (1), the liquid level telemetry system (32) is connected to the second liquid level meter (31) by signal, and the control system (5) is also connected to the liquid level telemetry system (32) by signal.

9. The ballast water TRO neutralization treatment system according to claim 1, characterized in that: A salinity meter (21), a thermometer (22), a dissolved oxygen meter (23) and a pH meter (24) are provided on the discharge pipeline (16) before the node where the neutralization and dosing pipeline (17) is connected to the discharge pipeline (16), and the control system (5) is also simultaneously connected to the salinity meter (21), the thermometer (22), the dissolved oxygen meter (23) and the pH meter (24) via signals.

10. A ship, characterized in that: It comprises the ballast water TRO neutralization treatment system as described in any one of claims 1 to 9.

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