Ship urea solution preparation system

Abstract

The utility model discloses a ship urea solution preparation system, which comprises a ship fresh water generator, a ship urea solution preparation system, a ship urea solution preparation system and a ship urea solution preparation system, a water outlet of the marine fresh water generator is communicated with the water tank; a stirrer is arranged in the dissolving cabinet, the water cabinet is communicated with the top of the dissolving cabinet, a feeding opening is formed in the top of the dissolving cabinet, the dissolving cabinet is connected with a steam pipe, a steam temperature controller is arranged in the dissolving cabinet, and an exhaust pipe is arranged at the top end of the dissolving cabinet; the first pump body is arranged on a pipeline between the water tank and the dissolving tank; the buffer cabinet is communicated with the bottom of the dissolving cabinet, and the buffer cabinet is provided with a liquid outlet pipe; and the second pump body is arranged on the pipeline between the dissolving cabinet and the buffer cabinet. The technical problems existing in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of urea solution preparation, in particular to a ship urea solution preparation system. Background Art

[0002] Due to the increasingly severe global air pollution, ship exhaust emissions mainly caused by burning low-quality fuel have become one of the important factors of global air pollution. In order to reduce the degree of air pollution, large cargo ships have been installed with marine selective catalytic reduction denitrification treatment systems in accordance with the requirements of the International Maritime Organization and the current marine diesel engine exhaust denitrification scheme. The working principle of the system: Under high temperature conditions, with the help of the catalytic action of the catalyst inside the equipment reaction tower, the ammonia (NH3) produced by the thermal decomposition of urea solution reacts with the NOX in the exhaust gas to produce pollution-free nitrogen (N2) and water (H2O) and discharge them into the atmosphere, thereby reducing the pollution of NOX to the atmosphere. In order to maintain the normal operation of the denitrification system, existing ships use the method of adding urea solution, but there are the following disadvantages: 1. Urea solution is difficult to store and takes up a large storage space; 2. Due to objective conditions such as different policies and traffic restrictions around the world, the procedures for adding urea solution are cumbersome and expensive, and many ports cannot supply ships; 3. Due to environmental protection policy restrictions, if a ship lacks urea solution, it cannot sail in the nitrogen oxide emission control area, affecting the normal operation of the ship. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provides a ship urea solution preparation system. The system utilizes an existing ship fresh water maker on a ship to continuously generate distilled water with low cost. The distilled water generated by the ship fresh water maker has low impurities, and the impurities of the urea solution after the distilled water and solid urea are mixed are also low. Solid urea is added into a dissolving cabinet, and the solid urea and distilled water generate a urea solution under the action of a stirrer. The solid urea has low cost, is convenient to store, and occupies little space. The steam temperature controller and the steam pipe cooperate to control the temperature in the dissolving cabinet, and splashing and heat generation will not occur during the dissolving process, and the safety factor is high.

[0004] To achieve the above-mentioned object, the utility model provides a ship urea solution preparation system, comprising: a ship fresh water generator, the ship fresh water generator processes seawater into distilled water;

[0005] A water tank, the water outlet of the marine fresh water generator is connected to the water tank;

[0006] A dissolving cabinet, wherein a stirrer is provided in the dissolving cabinet, the water tank is connected to the top of the dissolving cabinet, a feeding port is provided on the top of the dissolving cabinet, a steam pipe is connected to the dissolving cabinet, a steam temperature controller is provided in the dissolving cabinet, and an exhaust pipe is provided on the top of the dissolving cabinet;

[0007] A first pump body, the first pump body is arranged on the pipeline between the water tank and the dissolution tank;

[0008] A buffer tank, the buffer tank is connected to the bottom of the dissolution tank, and the buffer tank is provided with a liquid outlet pipe;

[0009] A second pump body, wherein the second pump body is arranged on the pipeline between the dissolution tank and the buffer tank.

[0010] Furthermore, the ship urea solution preparation system also includes:

[0011] Control cabinet;

[0012] a first solenoid valve, wherein the first solenoid valve is arranged on the steam pipe;

[0013] The first pump body, the second pump body, the first solenoid valve and the steam temperature controller are electrically connected to the control cabinet respectively.

[0014] Furthermore, there are two dissolution cabinets, which are connected in parallel and have the same structure. There are two second pump bodies, which are connected in parallel. The two parallel-connected dissolution cabinets are connected in series with the two parallel-connected second pump bodies. Second solenoid valves are respectively provided on the branches where the two dissolution cabinets are located, and the second solenoid valves are located between the dissolution cabinet and the first pump body. The two second solenoid valves and the two second pump bodies are respectively electrically connected to the control cabinet.

[0015] Furthermore, the ship urea solution preparation system further includes a crushing feeder, and the crushing feeder includes:

[0016] shell;

[0017] a pulverizer, the pulverizer being disposed in the housing;

[0018] A feed inlet, the feed inlet being arranged at the top of the shell;

[0019] A discharge port, the discharge port being arranged at the bottom end of the shell, and the discharge port being matched with the feeding port;

[0020] A protective shell, wherein the top of the protective shell is sealed and fixed to the bottom of the outer shell, the bottom of the protective shell is sealed and fixed to the top of the dissolving cabinet, and the discharge port of the outer shell and the feeding port of the dissolving cabinet are respectively located in the protective shell;

[0021] A motor is installed on the outside of the side wall of the protective shell and is drivingly connected to the pulverizer.

[0022] Furthermore, the ship urea solution preparation system also includes:

[0023] A reverse osmosis unit, wherein the reverse osmosis unit is disposed between the first pump body and the dissolution tank;

[0024] A water quality monitoring unit is provided between the reverse osmosis unit and the dissolution cabinet.

[0025] Furthermore, the reverse osmosis unit includes filter cotton, activated carbon, a carbon rod filter element, a flow meter, a booster pump, a reverse osmosis membrane and a composite filter element connected in sequence, the filter cotton is connected to the first pump body, and the composite filter element is connected to the water quality monitoring unit.

[0026] Furthermore, the dissolution cabinet and the buffer cabinet are respectively provided with liquid level electrodes, and the two liquid level electrodes are respectively electrically connected to the control cabinet.

[0027] Furthermore, a concentration monitor is provided in the dissolution cabinet, and the concentration monitor is electrically connected to the control cabinet.

[0028] The beneficial effects of the utility model are:

[0029] By using the existing marine fresh water generator on the ship, distilled water can be continuously produced at a low cost. The distilled water produced by the marine fresh water generator has low impurities, and the urea solution after the distilled water and solid urea are mixed will also have low impurities.

[0030] Solid urea is added into the dissolving cabinet, and the solid urea and distilled water generate urea solution under the action of the agitator. The solid urea has low cost, is easy to store, and occupies little space;

[0031] The steam temperature controller and steam pipe can control the temperature in the dissolving cabinet. No splashing or heat generation will occur during the dissolving process, and the safety factor is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0033] Figure 1 This is an overall schematic diagram of a ship urea solution preparation system of the utility model;

[0034] Figure 2 It is a schematic diagram of a reverse osmosis unit in a ship urea solution preparation system of the utility model;

[0035] Figure 3The utility model is a schematic diagram of a crushing feeder in a ship urea solution preparation system.

[0036] In the figure, 1. marine fresh water generator; 2. water tank; 3. dissolving tank; 4. agitator; 5. feeding port; 6. steam pipe; 7. steam temperature controller; 8. exhaust pipe; 9. first pump body; 10. buffer tank; 11. liquid outlet pipe; 12. second pump body; 13. first solenoid valve; 14. second solenoid valve; 15. outer shell; 16. pulverizer; 17. feed port; 18. discharge port; 19. protective shell; 20. motor; 21. filter cotton; 22. activated carbon; 23. carbon rod filter element; 24. booster pump; 25. reverse osmosis membrane; 26. composite filter element; 27. water quality monitoring unit; 28. reverse osmosis unit; 29. ​​liquid level electrode. DETAILED DESCRIPTION

[0037] Combine the following Figure 1-Figure 3 , the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0038] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0039] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In addition, the technical solutions between the various embodiments of the present application can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0042] The utility model provides a ship urea solution preparation system.

[0043] A ship urea solution preparation system comprises: a ship fresh water generator 1, which processes seawater into distilled water; a water tank 2, wherein a water outlet of the ship fresh water generator 1 is connected to the water tank 2; a dissolving tank 3, wherein a stirrer 4 is arranged in the dissolving tank 3, the water tank 2 is connected to the top of the dissolving tank 3, a feeding port 5 is arranged on the top of the dissolving tank 3, a steam pipe 6 is connected to the dissolving tank 3, a steam temperature controller 7 is arranged in the dissolving tank 3, and an exhaust pipe 8 is arranged on the top of the dissolving tank 3; a first pump body 9, which is arranged on the pipeline between the water tank 2 and the dissolving tank 3; a buffer tank 10, which is connected to the bottom of the dissolving tank 3, and a liquid outlet pipe 11 is arranged in the buffer tank 10; and a second pump body 12, which is arranged on the pipeline between the dissolving tank 3 and the buffer tank 10.

[0044] In the technical solution proposed in the present application, the existing marine fresh water generator 1 on the ship is utilized to continuously generate distilled water with low cost. The distilled water generated by the marine fresh water generator 1 has low impurities, and the impurities of the urea solution after the distilled water and solid urea are mixed are also low. Solid urea is added into the dissolution cabinet 3, and the solid urea and distilled water generate a urea solution under the action of the agitator 4. The solid urea has low cost, is easy to store, and occupies little space. The steam temperature controller 7 and the steam pipe 6 cooperate to control the temperature in the dissolution cabinet 3. No splashing or heat generation will occur during the dissolution process, and the safety factor is high.

[0045] The ship urea solution preparation system also includes: a control cabinet; a first solenoid valve 13, which is arranged on the steam pipe 6; the first pump body 9, the second pump body 12, the first solenoid valve 13 and the steam temperature controller 7 are electrically connected to the control cabinet respectively.

[0046] There are two dissolution cabinets 3, which are connected in parallel. The two dissolution cabinets 3 have the same structure. There are two second pump bodies 12, which are connected in parallel. The two parallel dissolution cabinets 3 are connected in series with the two parallel second pump bodies 12. Second solenoid valves 14 are respectively provided on the branch roads where the two dissolution cabinets 3 are located. The second solenoid valves 14 are located between the dissolution cabinet 3 and the first pump body 9. The two second solenoid valves 14 and the two second pump bodies 12 are respectively electrically connected to the control cabinet.

[0047] The two dissolving cabinets 3 are mutually redundant, and the two parallel dissolving cabinets 3 and the two parallel second pump bodies 12 can cooperate with each other to form four circulation routes, thereby ensuring the operational reliability of the utility model.

[0048] The ship urea solution preparation system also includes a pulverizing feeder, which includes: an outer shell 15; a pulverizer 16, which is arranged in the outer shell 15; a feed port 17, which is arranged at the top of the outer shell 15; a discharge port 18, which is arranged at the bottom of the outer shell 15, and the discharge port 18 cooperates with the feeding port 5; a protective shell 19, the top of the protective shell 19 is sealed and fixed to the bottom of the outer shell 15, the bottom of the protective shell 19 is sealed and fixed to the top of the dissolution cabinet 3, the discharge port 18 of the outer shell 15 and the feeding port 5 of the dissolution cabinet 3 are respectively located in the protective shell 19; a motor 20, which is installed on the outside of the side wall of the protective shell 19, and the motor 20 is drivingly connected to the pulverizer 16.

[0049] Solid urea is added to the feed port 17, and the pulverizer 16 pulverizes the solid urea so that the solid urea can be better mixed with distilled water. The protection shell 19 can prevent the pulverized solid urea from leaking out.

[0050] The ship urea solution preparation system further includes: a reverse osmosis unit 28 , which is disposed between the first pump body 9 and the dissolution tank 3 ; and a water quality monitoring unit 27 , which is disposed between the reverse osmosis unit 28 and the dissolution tank 3 .

[0051] The reverse osmosis unit 28 can further filter the distilled water, and the water quality detection unit 27 can monitor whether the water quality meets the standards.

[0052] The reverse osmosis unit 28 includes filter cotton 21, activated carbon 22, carbon rod filter element 23, flow meter, booster pump 24, reverse osmosis membrane 25 and composite filter element 26 connected in sequence. The filter cotton 21 is connected to the first pump body 9, and the composite filter element 26 is connected to the water quality monitoring unit 27.

[0053] The dissolution tank 3 and the buffer tank 10 are respectively provided with liquid level electrodes 29 , and the two liquid level electrodes 29 are respectively electrically connected to the control cabinet.

[0054] A concentration monitor is provided in the dissolution cabinet 3, and the concentration monitor is electrically connected to the control cabinet.

[0055] The working principle of the utility model is as follows:

[0056] Before a ship enters a NOX emission control area and is ready to start the selective catalytic reduction denitration treatment system, it must first start the system to generate urea solution;

[0057] Turn on the reverse osmosis unit 28 and the water quality monitoring unit 27. At this time, the dissolution tank 3 is at a low liquid level. The liquid level electrode 29 of the dissolution tank triggers the first pump body 9 to replenish water to the dissolution tank 3. When the water level reaches the high liquid level, it stops.

[0058] At the same time, the steam temperature controller 7 senses the temperature of the water in the dissolving tank 3 and ensures that the water temperature is around 60 degrees Celsius by adjusting the opening of the first solenoid valve 13;

[0059] The on-duty personnel add a certain amount of solid urea to the crushing feeder according to the dissolution ratio;

[0060] The stirrer 4 performs stirring work, and the timed dissolution and concentration monitor monitors. When the urea is completely dissolved and the concentration is stable, the urea solution is injected into the buffer tank 10 through the second pump body 12 .

[0061] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the inventive concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A ship urea solution preparation system, characterized in that: include: A marine freshwater generator, which processes seawater into distilled water; A water tank, the water outlet of the marine fresh water generator is connected to the water tank; A dissolving cabinet, wherein a stirrer is provided in the dissolving cabinet, the water tank is connected to the top of the dissolving cabinet, a feeding port is provided on the top of the dissolving cabinet, a steam pipe is connected to the dissolving cabinet, a steam temperature controller is provided in the dissolving cabinet, and an exhaust pipe is provided on the top of the dissolving cabinet; A first pump body, the first pump body is arranged on the pipeline between the water tank and the dissolution tank; A buffer tank, the buffer tank is connected to the bottom of the dissolution tank, and the buffer tank is provided with a liquid outlet pipe; A second pump body, wherein the second pump body is arranged on the pipeline between the dissolution tank and the buffer tank.

2. The ship urea solution preparation system according to claim 1, characterized in that: The ship urea solution preparation system also includes: Control cabinet; a first solenoid valve, wherein the first solenoid valve is arranged on the steam pipe; The first pump body, the second pump body, the first solenoid valve and the steam temperature controller are electrically connected to the control cabinet respectively.

3. The ship urea solution preparation system according to claim 2, characterized in that: There are two dissolution cabinets, which are connected in parallel and have the same structure. There are two second pump bodies, which are connected in parallel. The two parallel-connected dissolution cabinets are connected in series with the two parallel-connected second pump bodies. Second solenoid valves are respectively provided on the branches where the two dissolution cabinets are located. The second solenoid valves are located between the dissolution cabinet and the first pump body. The two second solenoid valves and the two second pump bodies are respectively electrically connected to the control cabinet.

4. The ship urea solution preparation system according to claim 1, characterized in that: The ship urea solution preparation system further includes a crushing feeder, which includes: shell; a pulverizer, the pulverizer being disposed in the housing; A feed inlet, the feed inlet being arranged at the top of the shell; A discharge port, the discharge port being arranged at the bottom end of the shell, and the discharge port being matched with the feeding port; A protective shell, wherein the top of the protective shell is sealed and fixed to the bottom of the outer shell, the bottom of the protective shell is sealed and fixed to the top of the dissolving cabinet, and the discharge port of the outer shell and the feeding port of the dissolving cabinet are respectively located in the protective shell; A motor is installed on the outside of the side wall of the protective shell and is drivingly connected to the pulverizer.

5. The ship urea solution preparation system according to claim 1, characterized in that: The ship urea solution preparation system also includes: A reverse osmosis unit, wherein the reverse osmosis unit is disposed between the first pump body and the dissolution tank; A water quality monitoring unit is provided between the reverse osmosis unit and the dissolution cabinet.

6. The ship urea solution preparation system according to claim 5, characterized in that: The reverse osmosis unit includes filter cotton, activated carbon, a carbon rod filter element, a flow meter, a booster pump, a reverse osmosis membrane and a composite filter element which are connected in sequence. The filter cotton is connected to the first pump body, and the composite filter element is connected to the water quality monitoring unit.

7. The ship urea solution preparation system according to claim 2, characterized in that: The dissolution cabinet and the buffer cabinet are respectively provided with liquid level electrodes, and the two liquid level electrodes are respectively electrically connected to the control cabinet.

8. The ship urea solution preparation system according to claim 2, characterized in that: A concentration monitor is provided in the dissolution cabinet, and the concentration monitor is electrically connected to the control cabinet.

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