A novel method and apparatus for rust removal using ice particles

Abstract

This invention relates to the field of ship rust removal technology, specifically to a novel ice particle rust removal method and apparatus. Ni powder is added to a mixing chamber. A magnetic field coil wound around the outside of the mixing chamber ensures the Ni powder and water are mixed evenly. A high-pressure water pump delivers the Ni-containing water to an ice particle preparation chamber. The Ni-containing water is atomized and sprayed through an atomizing nozzle, simultaneously atomizing the Ni powder within the water. A high-pressure liquid nitrogen chamber simultaneously delivers atomized liquid nitrogen to the ice particle preparation chamber. Ice particles are connected to a spray gun through an ice particle inlet pipe. High-pressure gas enters the mixing chamber through a pressure valve and is evenly sprayed through the spray gun nozzle. The spray gun uses a magnetic field and pneumatic assistance to atomize the ice particles. By adding Ni powder to the atomized water inside the ice particle preparation chamber, ice-making efficiency is improved. Simultaneously, the Ni powder micro-ice particles provide magnetism, and the combined pneumatic pressurization and magnetic field accelerate the spraying. Due to the magnetism of the ice particles, they can be recovered through the magnetic field, allowing for the reuse of Ni powder and some water, thus solving multiple problems related to ice making, clogging prevention, and recovery.

Description

Technical Field

[0001] This invention relates to the field of ship rust removal technology, and in particular to a novel ice particle rust removal method and apparatus. Background Technology

[0002] Ships operate in harsh marine environments for extended periods, and their hulls and decks are subject to various forms of corrosion. Traditional metal surface rust removal technologies mainly include sandblasting and ultra-high pressure water blasting, but both have significant drawbacks. Ice particle blasting technology has been proposed as an environmentally friendly alternative. Its principle is to utilize the hardness characteristics of low-temperature ice particles, driven by compressed air to impact the metal surface, achieving pollution-free rust removal.

[0003] In the prior art, such as the patent with publication number CN118960275B, a rapid ice-making device and an ice particle blasting rust removal system are disclosed, including a supercooled water preparation system, an ice-making system and a control system. The ice-making system includes a first high-pressure gas tank, a first branch pipe for introducing high-pressure gas from the first high-pressure gas tank into the inner cavity of a heat exchanger, an ice-making chamber located below the heat exchanger, a water supply pipe with one end connected to a drain outlet at the bottom of the heat exchanger and the other end connected to an atomizing nozzle on the ice-making chamber, and a second branch pipe connecting the first high-pressure gas tank and an ice drop outlet at the bottom of the ice-making chamber. The ice-making chamber is equipped with a coil for generating an external magnetic field inside the ice-making chamber.

[0004] The above structure uses a magnetic field to accelerate the nucleation of pure water and subcooled water to produce ice particles without impurities. However, it cannot solve many problems such as ice making, anti-clogging, and recycling in the overall ice making and rust removal process, and the process is relatively complicated. Summary of the Invention

[0005] In view of this, the purpose of this invention is to propose a novel ice particle rust removal method and apparatus to solve the problems of ice making, anti-clogging, recycling, and cumbersome processes in the overall ice making and rust removal process.

[0006] To achieve the above objectives, the present invention provides a novel ice particle rust removal method and apparatus, comprising a high-pressure liquid nitrogen chamber and a Ni-containing water mixing chamber. Both the high-pressure liquid nitrogen chamber and the Ni-containing water mixing chamber are connected to an ice particle preparation chamber via pipelines. A liquid nitrogen flow valve is provided in the pipeline between the high-pressure liquid nitrogen chamber and the ice particle preparation chamber. Multiple sets of liquid nitrogen atomizing nozzles are respectively provided on both sides of the end of the high-pressure liquid nitrogen chamber, and the end of the high-pressure liquid nitrogen chamber extends into the interior of the ice particle preparation chamber.

[0007] The interior of the Ni-containing water mixing chamber is equipped with a magnetic field coil, and the pipeline between the Ni-containing water mixing chamber and the ice particle preparation chamber is equipped with a Ni-containing water flow valve. The end of the Ni-containing water mixing chamber is equipped with a Ni-containing water atomizing nozzle, which is located on the inner top wall of the ice particle preparation chamber. The exterior of the Ni-containing water mixing chamber is connected to a recovery liquefaction chamber via a pipeline, and the pipeline between the recovery liquefaction chamber and the Ni-containing water mixing chamber is equipped with a filter valve.

[0008] An ice particle inlet pipe is fixedly connected to the outside of the ice particle preparation chamber, and a spray gun is connected to the end of the ice particle inlet pipe;

[0009] The spray gun has a mixing chamber inside that is connected to the ice particle inlet pipe. A pneumatic pressure valve is connected to one side of the mixing chamber, and the other side of the mixing chamber is connected to the outlet of the spray gun. A magnetic field coil is installed outside the outlet of the mixing chamber, and a permanent magnet is installed outside the mixing chamber.

[0010] The novel ice particle rust removal method further includes the following steps:

[0011] S101. Add Ni powder to the Ni-containing water mixing chamber, and mix the Ni powder and water evenly through the magnetic field coil wound around the outside of the Ni-containing water mixing chamber.

[0012] S102. Ni-containing water is sent to the ice particle preparation chamber by a high-pressure water pump, and Ni-containing water is atomized and sprayed out through a Ni-containing water atomizing nozzle to atomize Ni powder in the water.

[0013] S103. Simultaneously, the high-pressure liquid nitrogen chamber sends atomized liquid nitrogen to the ice particle preparation chamber through a pressure reducing flow valve. The liquid nitrogen is sprayed out by the liquid nitrogen atomizing nozzle and ice particles are prepared by T-shaped sedimentation.

[0014] S104, liquid nitrogen flow valve and Ni-containing water flow valve are controlled by computer, and the flow rate is changed according to the needs of the operation to prepare the ice particle diameter required;

[0015] S105. Ice particles are connected to the spray gun through the ice particle inlet pipe. High-pressure gas enters the mixing chamber through the pressure valve, so that the ice particles no longer stick together. They are then sprayed out evenly through the spray gun nozzle. An electromagnetic field coil is wrapped around the outside of the spray gun. The ice particles are sprayed out with the help of magnetic field and pneumatics.

[0016] S106. After the ice particles are applied to the ship for rust removal, the mixture sprayed out is adsorbed by the permanent magnet on the spray gun for recycling and drying. The recovered Ni powder enters the recycling liquefaction chamber for heating and liquefaction, and is then replenished to the Ni-containing water mixing chamber through the filter valve.

[0017] Preferably, the magnetic field strength in step 101 is 0.2T~0.3T, the particle size of Ni powder in the Ni-water mixing chamber is 50μm~150μm, and the magnetic field strength in step 105 is 1.5T~2.0T.

[0018] Preferably, the Ni-containing water atomizing nozzle and the liquid nitrogen atomizing nozzle are combined into a T-shaped structure, and the liquid nitrogen atomizing nozzles are staggered and distributed on the outside of the high-pressure liquid nitrogen tank pipeline.

[0019] Preferably, the outlet of the spray gun has a conical structure, and the magnetic field coil is distributed outside the conical outlet.

[0020] Preferably, a scraper is slidably mounted on the outside of the spray gun, and the scraper corresponds to the permanent magnet.

[0021] Preferably, both the high-pressure liquid nitrogen chamber and the Ni-containing water atomizing nozzle are equipped with high-pressure water pumps.

[0022] The beneficial effects of this invention are:

[0023] By adding Ni powder to the atomized water inside the ice particle preparation chamber, the Ni powder acts as a condensation nucleus and magnetic medium, mixing with water to create magnetic composite ice particles, thus improving ice-making efficiency. At the same time, the Ni powder micro-ice particles provide magnetism, and the ice is accelerated by pneumatic pressurization combined with a magnetic field, simplifying the ice spraying process and improving the ice spraying efficiency. Furthermore, due to the magnetic properties of the ice particles, they can be recycled through a magnetic field, allowing for the reuse of Ni powder and some water, simplifying the recycling process and solving multiple problems such as ice making, anti-clogging, and recycling in one fell swoop. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the spray gun of the present invention;

[0027] Figure 3 This is a flowchart of the process of the method of the present invention.

[0028] The following are labeled in the diagram: 1. High-pressure liquid nitrogen chamber; 2. Liquid nitrogen flow valve; 3. Ice particle preparation chamber; 4. Ni-containing water atomizing nozzle; 5. Liquid nitrogen atomizing nozzle; 6. Ni-containing water flow valve; 7. Ni-containing water mixing chamber; 8. Magnetic field coil; 9. Filter valve; 10. Recovery liquefaction chamber; 11. Pneumatic pressure valve; 12. Mixing chamber; 13. Ice particle inlet pipe; 14. Magnetic field coil; 15. Spray gun; 16. Permanent magnet; 17. Scraper. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.

[0030] like Figure 1 , Figure 2 , Figure 3 As shown, a novel ice particle rust removal method includes a high-pressure liquid nitrogen chamber 1 and a Ni-containing water mixing chamber 7. Both the high-pressure liquid nitrogen chamber 1 and the Ni-containing water mixing chamber 7 are connected to an ice particle preparation chamber 3 via pipelines. A liquid nitrogen flow valve 2 is installed in the pipeline between the high-pressure liquid nitrogen chamber 1 and the ice particle preparation chamber 3. Multiple sets of liquid nitrogen atomizing nozzles 5 are respectively installed on both sides of the end of the high-pressure liquid nitrogen chamber 1. The end of the high-pressure liquid nitrogen chamber 1 extends into the interior of the ice particle preparation chamber 3.

[0031] A magnetic field coil 8 is installed inside the Ni-containing water mixing chamber 7, and a Ni-containing water flow valve 6 is installed in the pipeline between the Ni-containing water mixing chamber 7 and the ice particle preparation chamber 3. A Ni-containing water atomizing nozzle 4 is installed at the end of the Ni-containing water mixing chamber 7. The Ni-containing water atomizing nozzle 4 is located on the inner top wall of the ice particle preparation chamber 3. The outside of the Ni-containing water mixing chamber 7 is connected to the recovery liquefaction chamber 10 through a pipeline. A filter valve 9 is installed in the pipeline between the recovery liquefaction chamber 10 and the Ni-containing water mixing chamber 7.

[0032] An ice particle preparation chamber 3 is externally fixedly connected to an ice particle inlet pipe 13, and a spray gun 15 is connected to the end of the ice particle inlet pipe 13.

[0033] The spray gun 15 has a mixing chamber 12 inside that is connected to the ice particle inlet pipe 13. A pneumatic pressure valve 11 is connected to one side of the mixing chamber 12, and the other side of the mixing chamber 12 is connected to the outlet of the spray gun 15. An electromagnetic field coil 14 is installed outside the outlet of the mixing chamber 12, and a permanent magnet 16 is installed outside the mixing chamber 12.

[0034] In this embodiment, Ni powder is added to the atomized water inside the ice particle preparation chamber 3. The Ni powder acts as a condensation nucleus and magnetic medium, and is mixed with water to produce magnetic composite ice particles, thereby improving the ice-making efficiency. At the same time, the Ni powder micro-ice particles provide magnetism, and are accelerated out by pneumatic pressurization combined with a magnetic field, which simplifies the ice spraying process and improves the ice spraying efficiency. Furthermore, due to the magnetism of the ice particles, the ice particles can be recovered through a magnetic field, and the Ni powder and some water can be reused, simplifying the recovery process and solving multiple problems such as ice making, anti-clogging, and recovery in one fell swoop.

[0035] As one implementation method, such as Figure 1 As shown, the Ni-containing water atomizing nozzle 4 and the liquid nitrogen atomizing nozzle 5 are combined into a T-shaped structure, and the liquid nitrogen atomizing nozzle 5 are staggered on the outside of the high-pressure liquid nitrogen tank 1 pipeline.

[0036] In this embodiment, Ni powder is mixed with water as a condensation nucleus and magnetic medium to produce magnetic composite ice particles. When the ice particles containing Ni powder enter a non-uniform magnetic field, the particles are magnetized and become tiny magnets. Ice particles are prepared in the ice particle preparation chamber 3 by T-shaped sedimentation.

[0037] As one implementation method, such as Figure 1 , Figure 2 As shown, the outlet of the spray gun 15 has a conical structure, and the electromagnetic field coils 14 are distributed outside the conical outlet. The magnetic field is designed to have a strong gradient inside the spray gun 15 along the spray direction, and the magnetic field is strongest near the outlet of the spray gun 15.

[0038] In this embodiment, ice particles are connected to the spray gun 15 through the ice particle inlet pipe 13. High-pressure gas enters the mixing chamber 12 through the pressure valve, so that the ice particles no longer stick together and are evenly sprayed out through the nozzle of the spray gun 15. An electromagnetic field coil 14 is wound around the outside of the spray gun 15, and the ice particles are sprayed out with the help of magnetic field and pneumatics.

[0039] High-pressure gas enters the mixing chamber 12 through the pneumatic pressure valve 11, providing the main kinetic energy to the ice particles, causing them to move forward and separate from each other. At the same time, the electromagnetic field coil 14 is energized, generating a strong, forward-directed magnetic field gradient, which gives the ice particles a higher exit velocity than simple pneumatic injection. Furthermore, the entire conveying and injection system relies on the magnetic fields generated by the magnetic field coil 8 and the electromagnetic field coil 14 to keep the magnetic ice particles in a suspended and dispersed state, fundamentally avoiding adhesion.

[0040] As one implementation method, such as Figure 2 As shown, a scraper 17 is slidably mounted on the outside of the spray gun 15, and the scraper 17 corresponds to the permanent magnet 16.

[0041] In this embodiment, water, fine impurities, and Ni powder are mixed in a mixture. When the permanent magnet 16 outside the spray gun 15 is aligned with the mixture, the broken ice particles still contain Ni powder. The Ni powder is instantly captured by the magnetic field and adsorbed onto the surface of the permanent magnet 16, while the water and non-magnetic impurities are unaffected. The ice particles are recovered by magnetic adsorption using the magnet. The Ni powder can be recovered by moving the scraper 17, filtered, and then recycled, which greatly reduces material consumption and cost.

[0042] As one implementation method, such as Figure 1 As shown, both the high-pressure liquid nitrogen chamber 1 and the Ni-containing water atomizing nozzle 4 are equipped with high-pressure water pumps.

[0043] In this embodiment, Ni-containing water is sent to the ice particle preparation chamber 3 by a high-pressure water pump. The Ni-containing water is atomized and sprayed out through the Ni-containing water atomizing nozzle 4, atomizing Ni powder in the water. At the same time, while the high-pressure liquid nitrogen chamber 1 is being transported by the high-pressure water pump, the pressure reducing flow valve simultaneously sends the atomized liquid nitrogen to the ice particle preparation chamber 3, which is sprayed out by the liquid nitrogen atomizing nozzle 5. Ice particles are prepared through T-shaped sedimentation, avoiding the instability of supercooled water and resulting in higher ice-making efficiency.

[0044] This specification also provides a novel method for removing rust using ice particles, such as... Figure 3 As shown, it also includes the following steps:

[0045] S101. Ni powder is added to the Ni-containing water mixing chamber 7, and the Ni powder and water are mixed evenly through the magnetic field coil 8 wound around the outside of the Ni-containing water mixing chamber 7.

[0046] S102. Ni-containing water is sent to ice particle preparation chamber 3 by a high-pressure water pump, and Ni-containing water is atomized and sprayed out through Ni-containing water atomizing nozzle 4 to atomize Ni powder in water.

[0047] S103. Simultaneously, the high-pressure liquid nitrogen chamber 1 sends atomized liquid nitrogen to the ice particle preparation chamber 3 through the pressure reducing flow valve. The liquid nitrogen is sprayed out by the liquid nitrogen atomizing nozzle 5 and ice particles are prepared by T-shaped sedimentation.

[0048] S104, liquid nitrogen flow valve 2 and Ni-containing water flow valve 6 are controlled by a computer to change the flow rate and ice particle diameter required for the preparation according to the needs of the operation;

[0049] S105. Ice particles are connected to the spray gun 15 through the ice particle inlet pipe 13. High-pressure gas enters the mixing chamber 12 through the pressure valve, so that the ice particles no longer stick together. They are evenly sprayed out through the nozzle of the spray gun 15. An electromagnetic field coil 14 is wrapped around the outside of the spray gun 15. The ice particles are sprayed out with the help of magnetic field and pneumatics.

[0050] S106. After the ice particles are applied to the ship for rust removal, the mixture sprayed out is adsorbed by the permanent magnet 16 on the spray gun 15 for recycling and drying. After the Ni powder is recovered, it enters the recycling liquefaction chamber 10 for heating and liquefaction, and is then replenished to the Ni-containing water mixing chamber 7 through the filter valve 9.

[0051] In step 101, the magnetic field strength is 0.2T~0.3T, the Ni powder particle size in the Ni-water mixing chamber 7 is 50μm~150μm, and the magnetic field strength in step 105 is 1.5T~2.0T.

[0052] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0053] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A novel ice particle rust removal method, applied to a novel ice particle rust removal device, comprising a high-pressure liquid nitrogen chamber (1) and a Ni-containing water mixing chamber (7), characterized in that, The high-pressure liquid nitrogen chamber (1) and the Ni-containing water mixing chamber (7) are both connected to the ice particle preparation chamber (3) through pipes. The pipe between the high-pressure liquid nitrogen chamber (1) and the ice particle preparation chamber (3) is equipped with a liquid nitrogen flow valve (2). Multiple sets of liquid nitrogen atomizing nozzles (5) are respectively installed on both sides of the end of the high-pressure liquid nitrogen chamber (1). The end of the high-pressure liquid nitrogen chamber (1) extends into the interior of the ice particle preparation chamber (3). The interior of the Ni-containing water mixing chamber (7) is equipped with a magnetic field coil (8), and the pipeline between the Ni-containing water mixing chamber (7) and the ice particle preparation chamber (3) is equipped with a Ni-containing water flow valve (6). The end of the Ni-containing water mixing chamber (7) is equipped with a Ni-containing water atomizing nozzle (4), which is located on the inner top wall of the ice particle preparation chamber (3). The exterior of the Ni-containing water mixing chamber (7) is connected to a recovery liquefaction chamber (10) through a pipeline, and the pipeline between the recovery liquefaction chamber (10) and the Ni-containing water mixing chamber (7) is equipped with a filter valve (9). An ice particle inlet pipe (13) is fixedly connected to the outside of the ice particle preparation chamber (3), and a spray gun (15) is connected to the end of the ice particle inlet pipe (13). The spray gun (15) is equipped with a mixing chamber (12) connected to the ice particle inlet pipe (13). A pneumatic pressure valve (11) is connected to one side of the mixing chamber (12), and the other side of the mixing chamber (12) is connected to the outlet of the spray gun (15). An electromagnetic field coil (14) is provided outside the outlet of the mixing chamber (12), and a permanent magnet (16) is provided outside the mixing chamber (12). The novel ice particle rust removal method further includes the following steps: S101. Ni powder is added to the Ni-containing water mixing chamber (7), and the Ni powder and water are mixed evenly through the magnetic field coil (8) wound around the outside of the Ni-containing water mixing chamber (7). S102. Ni-containing water is sent to the ice particle preparation chamber (3) by a high-pressure water pump, and Ni-containing water is atomized and sprayed out through a Ni-containing water atomizing nozzle (4) to atomize Ni powder in the water; S103. At the same time, the high-pressure liquid nitrogen chamber (1) sends the atomized liquid nitrogen to the ice particle preparation chamber (3) through the pressure reducing flow valve. The liquid nitrogen is sprayed out by the liquid nitrogen atomizing nozzle (5) and ice particles are prepared by sedimentation. S104, liquid nitrogen flow valve (2) and Ni-containing water flow valve (6) are controlled by computer to change the flow rate and ice particle diameter required for preparation according to the needs of the operation; S105. Ice particles are connected to the spray gun (15) through the ice particle inlet pipe (13). High-pressure gas enters the mixing chamber (12) through the pressure valve, so that the ice particles no longer stick together. They are sprayed out evenly through the nozzle of the spray gun (15). An electromagnetic field coil (14) is wrapped around the outside of the spray gun (15). The ice particles are sprayed out with the help of magnetic field and pneumatics. S106. After the ice particles are applied to the ship for rust removal, the mixture after spraying is adsorbed by the permanent magnet (16) on the spray gun (15) for recycling and drying. After the Ni powder is recycled, it enters the recycling liquefaction chamber (10) for heating and liquefaction. It is then replenished to the Ni-containing water mixing chamber (7) through the filter valve (9).

2. The novel ice particle rust removal method according to claim 1, characterized in that, The magnetic field strength in step S101 is 0.2T~0.3T, the particle size of Ni powder in the Ni-water mixing chamber (7) is 50μm~150μm, and the magnetic field strength in step S105 is 1.5T~2.0T.

3. The novel ice particle rust removal method according to claim 1, characterized in that, The Ni-containing water atomizing nozzle (4) and the liquid nitrogen atomizing nozzle (5) are combined into a T-shaped structure, and the liquid nitrogen atomizing nozzle (5) is staggered on the outside of the high-pressure liquid nitrogen tank (1) pipeline.

4. The novel ice particle rust removal method according to claim 1, characterized in that, The nozzle (15) has a conical outlet, and the electromagnetic field coil (14) is located outside the conical outlet.

5. The novel ice particle rust removal method according to claim 1, characterized in that, The spray gun (15) has a scraper (17) slidably mounted on its exterior, and the scraper (17) corresponds to the permanent magnet (16).

6. The novel ice particle rust removal method according to claim 1, characterized in that, The high-pressure liquid nitrogen chamber (1) is equipped with a high-pressure water pump.

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