System for preparing fresh water by using ship waste heat and marine fresh air

Abstract

The invention provides a system for preparing fresh water by using ship waste heat and marine fresh air, which comprises a dehumidification rotating wheel unit, a regenerated air heating unit, a seawater cooling unit, a water quality purification and disinfection unit, an air pipe and a water pipe, an air supply fan in the dehumidification rotating wheel unit is connected with the regenerated air heating unit through a fourth air pipe; the regenerated air heating unit is connected with a rotating wheel regeneration area in the dehumidification rotating wheel unit through a fifth air pipe, the rotating wheel regeneration area in the dehumidification rotating wheel unit is connected with a seawater condenser in the seawater cooling unit through a fifth air pipe, and a primary water storage tank in a seawater condensation part is connected with a water pump in the water quality purification and disinfection unit through a second water pipe. According to the system for preparing the fresh water by using the waste heat of the ship and the marine fresh air, fresh water self-sufficiency and efficient energy utilization of the ocean ship are realized, and the problems of high energy consumption and high cost of a traditional seawater desalination technology are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat utilization and fresh water production of ships, and particularly relates to a fresh water production system that utilizes the waste heat of ships and ocean fresh air. Background Art

[0002] With the rapid development of the global shipping industry, the problems of low ship energy efficiency and high greenhouse gas emissions have become increasingly prominent. The International Maritime Organization (IMO) has introduced mandatory measures including Energy Efficiency Existing Ship Index (EEXI) and Carbon Intensity Indicator (CII) to promote the transformation of ships towards low-carbon and high-energy efficiency. However, traditional fresh water production methods such as reverse osmosis and evaporative seawater desalination are energy-consuming, costly, and complex to maintain, and the fresh water supply of ocean-going ships mainly relies on shore replenishment or these high-energy-consuming technologies. At the same time, the waste heat of the main engines of ocean-going ships accounts for 30% to 50% of the total energy consumption, but this valuable waste heat resource is often ignored, resulting in energy waste. In recent years, the rotary dehumidification technology has received attention because it can utilize low-grade energy sources (such as solar energy, waste heat), but its application in ships is still in the initial stage of research. Therefore, it is particularly important to develop a fresh water production system that efficiently utilizes the waste heat of ships. Summary of the Invention

[0003] The purpose of the present invention is to provide a fresh water production system that utilizes the waste heat of ships and ocean fresh air, realizes the fresh water self-sufficiency of ocean-going ships and the efficient utilization of energy, and solves the problems of high energy consumption and high cost of traditional seawater desalination technologies.

[0004] To achieve the above purpose, the present invention provides a fresh water production system that utilizes the waste heat of ships and ocean fresh air, including a dehumidification wheel unit, a regeneration air heating unit, a seawater cooling unit, a water quality purification and disinfection unit, air ducts and water pipes. The air supply fan in the dehumidification wheel unit is connected to the regeneration air heating unit through the fourth air duct, the regeneration air heating unit is connected to the wheel regeneration area in the dehumidification wheel unit through the sixth air duct, the wheel regeneration area in the dehumidification wheel unit is connected to the seawater condenser in the seawater cooling unit through the fifth air duct, and the primary water storage tank in the seawater condensation part is connected to the water pump in the water quality purification and disinfection unit through the second water pipe.

[0005] Preferably, the air ducts include a first air duct, a second air duct, a third air duct, a fourth air duct, a fifth air duct, a sixth air duct, and a seventh air duct, and the water pipes include a first water pipe, a second water pipe, a third water pipe, a fourth water pipe, and a fifth water pipe; the first air duct, the second air duct, the third air duct, the fourth air duct, the fifth air duct, the sixth air duct, and the seventh air duct are all made of 304 or 316L stainless steel, and the first water pipe, the second water pipe, the third water pipe, the fourth water pipe, and the fifth water pipe are all made of 304 or 316L stainless steel.

[0006] Preferably, the dehumidification rotary wheel unit includes a rotary wheel and a supply air fan. The rotary wheel uses a stainless steel honeycomb carrier with a salt spray resistant coating. The rotary wheel includes a rotary wheel dehumidification area and a rotary wheel regeneration area, which are divided in a ratio of 3:1. The rotary wheel dehumidification area is connected to one side of the supply air fan through a second air duct.

[0007] Preferably, the regeneration air heating unit includes a ship waste heat heater and a ship waste heat heat source. The ship waste heat heater provides heat through the ship waste heat heat source.

[0008] Preferably, the seawater cooling unit includes a seawater condenser, a water collection tray, and a primary water storage tank. A water collection tray is provided at the bottom of the seawater condenser, and the water collection tray is connected to the primary water storage tank through a first water pipe; the primary water storage tank is made of 304 or 316L stainless steel.

[0009] Preferably, the water purification and disinfection unit includes a water pump, a multi-stage filter, an ultraviolet disinfection device, and a final water storage tank. The water pump is connected to one side of the multi-stage filter through a second water pipe, the other side of the multi-stage filter is connected to one side of the ultraviolet disinfection device through a third water pipe, and the other side of the ultraviolet disinfection device is connected to one side of the final water storage tank through a fourth water pipe; the fifth water pipe is the water supply pipe between the final water storage tank and the outside; the final water storage tank is made of 304 or 316L stainless steel.

[0010] Therefore, the present invention adopts the above-mentioned fresh water production system that utilizes ship waste heat and ocean fresh air to achieve fresh water self-sufficiency and efficient energy utilization of ocean-going ships, and solves the problems of high energy consumption and high cost of traditional seawater desalination technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of a fresh water production system that utilizes ship waste heat and ocean fresh air according to the present invention.

[0012] REFERENCE SIGNS

[0013] 1, rotary wheel dehumidification area; 2, rotary wheel regeneration area; 3, supply air fan; 4, ship waste heat heater; 5, ship waste heat heat source; 6, seawater condenser; 7, water collection tray; 8, primary water storage tank; 9, water pump; 10, multi-stage filter; 11, ultraviolet disinfection device; 12, final water storage tank; 13, first air duct; 14, second air duct; 15, third air duct; 16, fourth air duct; 17, fifth air duct; 18, sixth air duct; 19, seventh air duct; 20, first water pipe; 21, second water pipe; 22, third water pipe; 23, fourth water pipe; 24, fifth water pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The technical solutions of the present invention will be further described below with reference to the drawings and embodiments.

[0015] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those with ordinary skills in the field to which the present invention pertains.

[0016] Example 1

[0017] As Figure 1 shown, the present invention provides a fresh water production system using the waste heat of a ship and the fresh air of the ocean, including a dehumidification wheel unit, a regeneration air heating unit, a seawater cooling unit, a water quality purification and disinfection unit, air ducts and water pipes. The air supply fan 3 in the dehumidification wheel unit is connected to the regeneration air heating unit through the fourth air duct 16. The regeneration air heating unit is connected to the wheel regeneration area 2 in the dehumidification wheel unit through the fifth air duct 17. The wheel regeneration area 2 in the dehumidification wheel unit is connected to the seawater condenser 6 in the seawater cooling unit through the sixth air duct 18. The primary water storage tank 8 in the seawater condensation part is connected to the water pump 9 in the water quality purification and disinfection unit through the second water pipe 21.

[0018] The air ducts include a first air duct 13, a second air duct 14, a third air duct 15, a fourth air duct 16, a fifth air duct 17, a sixth air duct 18, and a seventh air duct 19. The water pipes include a first water pipe 20, a second water pipe 21, a third water pipe 22, a fourth water pipe 23, and a fifth water pipe 24. The first air duct 13, the second air duct 14, the third air duct 15, the fourth air duct 16, the fifth air duct 17, the sixth air duct 18, and the seventh air duct 19 are all made of 304 or 316L stainless steel. The first water pipe 20, the second water pipe 21, the third water pipe 22, the fourth water pipe 23, and the fifth water pipe 24 are all made of 304 or 316L stainless steel to ensure corrosion resistance and durability, and to ensure water quality safety and the long-term stable operation of the system.

[0019] The dehumidification wheel unit includes a wheel and an air supply fan 3. The wheel includes a wheel dehumidification area 1 and a wheel regeneration area 2. The wheel dehumidification area 1 and the wheel regeneration area 2 are divided in a ratio of 3:1. A tetrafluoro silicone strip is used for heat insulation between the two, and the wheel is driven to rotate by a motor. The wheel dehumidification area 1 is connected to one side of the air supply fan 3 through the second air duct 14. The fresh air of the ocean enters the wheel dehumidification area 1 from the first air duct 13, reaches the air supply fan 3 through the second air duct 14. The air supply fan 3 sends 1 / 3 of the fresh air as regeneration air to the regeneration air heating unit through the fourth air duct 16, and the air supply fan 3 sends 2 / 3 of the fresh air to the ship air conditioning system to supplement fresh air through the third air duct 15. The regeneration air heating unit includes a ship waste heat heater 4 and a ship waste heat heat source 5. The ship waste heat heater 4 provides heat through the ship waste heat heat source 5.

[0020] The seawater cooling unit includes a seawater condenser 6, a water collecting tray 7, and a primary water storage tank 8. A water collecting tray 7 is provided at the bottom of the seawater condenser 6. The water collecting tray 7 is connected to the primary water storage tank 8 through the first water pipe 20. The primary water storage tank 8 is made of 304 or 316L stainless steel.

[0021] The water purification and disinfection unit includes a water pump 9, a multi-stage filter 10, an ultraviolet disinfection device 11, and a final water storage tank 12, ensuring that the condensed water meets the domestic water standard after treatment (salinity < 1000 ppm, pH value and residual chlorine content meet national standards). The water pump 9 is connected to one side of the multi-stage filter 10 through the second water pipe 21. The other side of the multi-stage filter 10 is connected to one side of the ultraviolet disinfection device 11 through the third water pipe 22. The other side of the ultraviolet disinfection device 11 is connected to one side of the final water storage tank 12 through the fourth water pipe 23. The fifth water pipe 24 is the water supply pipe between the final water storage tank 12 and the outside. The final water storage tank 12 is made of 304 or 316L stainless steel. The marine fresh air enters the rotary dehumidification area 1 through the first air duct 13 for dehumidification treatment. The desiccant in the rotary wheel adsorbs the water vapor in the fresh air. The treated fresh air passes through the second air duct 14 and the air supply fan 3. 2 / 3 of the fresh air is used to supplement the fresh air for the ship air conditioning system to meet the air circulation and comfort requirements inside the ship. 1 / 3 of the fresh air is sent to the regeneration air heating unit as regeneration air through the fourth air duct 16, providing the necessary heat energy for the subsequent fresh water production process.

[0022] The regeneration air is heated to 80 - 120 °C by the ship waste heat heater 4 in the regeneration air heating unit. The heat source is provided by the ship waste heat source 5, which can be the high-temperature flue gas of the main engine or the high-pressure steam generated by the waste heat boiler. The heated regeneration air is sent into the rotary wheel regeneration area 2 through the fifth air duct 17 to desorb the water vapor adsorbed by the desiccant in the rotary wheel. The desiccant is a composite material of silica gel and calcium chloride. The desorbed water vapor follows the regeneration air and is sent to the seawater condenser 6 through the sixth air duct 18. The seawater condenser 6 uses a plate heat exchanger and uses the low-temperature seawater at 25 - 30 °C as the cold source. The water vapor in the regeneration air condenses and precipitates in the seawater condenser 6. The condensed water collects in the water collecting tray 7 at the bottom of the seawater condenser 6, and then under the action of gravity, it flows into the primary water storage tank 8 through the first water pipe 20 for temporary storage. The regenerated air after being cooled is discharged to the outside of the cabin through the seventh air duct 19, causing the water vapor in the regeneration air to condense and precipitate.

[0023] The condensed water is sent to the multi-stage filter 10 through the second water pipe 21 and the water pump 9 for filtration. The multi-stage filter 10 includes activated carbon filtration and precision filtration to remove impurities and pollutants in the water. The filtered water is sent to the ultraviolet disinfection device 11 through the third water pipe 22 for disinfection treatment to ensure water quality safety. Finally, it is sent into the final water storage tank 12 through the fourth water pipe 23. The fifth water pipe 24 is the water supply pipe between the final water storage tank 12 and the outside, realizing the supply of fresh water.

[0024] Therefore, the present invention adopts the above-mentioned fresh water production system using ship waste heat and marine fresh air, realizing the fresh water self-sufficiency and efficient energy utilization of ocean-going ships, and solving the problems of high energy consumption and high cost of traditional seawater desalination technology.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A fresh water production system using the waste heat of ships and ocean fresh air, characterized in that, It includes a dehumidifying rotary wheel unit, a regeneration air heating unit, a seawater cooling unit, a water purification and disinfection unit, air ducts and water pipes. The air supply fan in the dehumidifying rotary wheel unit is connected to the regeneration air heating unit through the fourth air duct. The regeneration air heating unit is connected to the rotary wheel regeneration area in the dehumidifying rotary wheel unit through the fifth air duct. The rotary wheel regeneration area in the dehumidifying rotary wheel unit is connected to the seawater condenser in the seawater cooling unit through the sixth air duct. The primary water storage tank in the seawater condensation part is connected to the water pump in the water purification and disinfection unit through the second water pipe.

2. A fresh water production system using the waste heat of a ship and ocean fresh air according to claim 1, characterized in that, The air ducts include the first air duct, the second air duct, the third air duct, the fourth air duct, the fifth air duct, the sixth air duct, and the seventh air duct. The water pipes include the first water pipe, the second water pipe, the third water pipe, the fourth water pipe, and the fifth water pipe. The first air duct, the second air duct, the third air duct, the fourth air duct, the fifth air duct, the sixth air duct, and the seventh air duct are all made of 304 or 316L stainless steel. The first water pipe, the second water pipe, the third water pipe, the fourth water pipe, and the fifth water pipe are all made of 304 or 316L stainless steel.

3. A fresh water production system using the waste heat of a ship and ocean fresh air according to claim 1, characterized in that, The dehumidifying rotary wheel unit includes a rotary wheel and an air supply fan. The rotary wheel uses a stainless steel honeycomb carrier with a salt spray resistant coating. The rotary wheel includes a rotary wheel dehumidification area and a rotary wheel regeneration area. The rotary wheel dehumidification area and the rotary wheel regeneration area are divided in a ratio of 3:

1. The rotary wheel dehumidification area is connected to one side of the air supply fan through the second air duct.

4. A fresh water production system using the waste heat of a ship and ocean fresh air according to claim 1, characterized in that, The regeneration air heating unit includes a ship waste heat heater and a ship waste heat heat source. The ship waste heat heater provides heat through the ship waste heat heat source.

5. A fresh water production system using the waste heat of a ship and ocean fresh air according to claim 1, characterized in that, The seawater cooling unit includes a seawater condenser, a water collecting tray, and a primary water storage tank. A water collecting tray is provided at the bottom of the seawater condenser. The water collecting tray is connected to the primary water storage tank through the first water pipe. The primary water storage tank is made of 304 or 316L stainless steel.

6. A fresh water production system using the waste heat of a ship and ocean fresh air according to claim 1, characterized in that, The water purification and disinfection unit includes a water pump, a multi-stage filter, an ultraviolet disinfection device, and a final water storage tank. The water pump is connected to one side of the multi-stage filter through the second water pipe. The other side of the multi-stage filter is connected to one side of the ultraviolet disinfection device through the third water pipe. The other side of the ultraviolet disinfection device is connected to one side of the final water storage tank through the fourth water pipe. The fifth water pipe is the water supply pipe between the final water storage tank and the outside. The final water storage tank is made of 304 or 316L stainless steel.

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