Aquaculture method using nuclear purified seawater

Abstract

A designer in a culture work ship is provided with a nuclear purification cabin, a coil pipe is arranged in the nuclear purification cabin from top to bottom, a precipitant solution is connected into the coil pipe, seawater is sent into a nuclear radiation primary detection device by a seawater pump to be detected, after nuclear radiation primary detection is qualified, the seawater enters a culture cabin through a pipeline, and otherwise, the seawater enters the culture cabin through a pipeline. The seawater enters the coil pipe again, enters the standing cabin through the coil pipe and waits for secondary detection of nuclear radiation, qualified seawater is fed into the culture cabin after the secondary detection is qualified, and otherwise, the seawater is circulated back to the coil pipe and enters the standing cabin again after being filtered by the coil pipe. According to the invention, nuclear radiation detection is carried out on the seawater entering the culture work ship, and the seawater with the nuclear radiation not exceeding the standard is injected into the culture cabin. In the nuclear purification operation process, no new pollution is generated to seawater, and the nuclear safety of the seawater in the culture cabin is ensured. And sediments formed by radionuclides are independently and specially stored, and are treated after the breeding work ship arrives at the shore, so that extra nuclear pollution is not caused.

Description

Technical Field

[0001] The invention belongs to the field of offshore aquaculture ship design and construction, and in particular relates to an aquaculture method utilizing nuclear purified seawater. Background Art

[0002] Whether the seawater is clean enough is the focus of the marine aquaculture industry. It is related to food safety issues and the scientific and sustainable development of my country's blue granary industry.

[0004] Aquaculture vessels are divided into sea-going aquaculture vessels and closed aquaculture vessels. Among them, closed aquaculture vessels are very suitable for adding nuclear purification functions. Summary of the invention

[0005] In order to solve the above problems, the present invention proposes a method for aquaculture using nuclear purified seawater, which injects nuclear purified and qualified seawater into the aquaculture cabin to ensure the nuclear safety of aquacultured fish. The technical solution adopted is: A breeding method using nuclear purified seawater, wherein a breeding ship is designed with a nuclear purification cabin, wherein coils are arranged from top to bottom in the nuclear purification cabin, wherein a precipitant solution is connected to the coils, and a seawater pump sends seawater to a nuclear radiation primary detection device for detection. After the nuclear radiation primary detection is qualified, the seawater enters the breeding cabin through a pipeline, otherwise, the seawater enters the coil again, and enters a static cabin through the coil, waiting for a nuclear radiation secondary detection. After the secondary detection is qualified, the qualified seawater is sent to the breeding cabin, otherwise, it circulates back to the coil, and enters the static cabin again through the coil filtration.

[0006] The above-mentioned aquaculture method using nuclear purified seawater, further, has a nuclear radiation primary detection device, a precipitant tank, and a nuclear radiation secondary detection device fixed on the deck, the inlet of the nuclear radiation primary detection device is connected to the seawater pump through a pipeline, the outlet of the nuclear radiation primary detection device is connected to the coil inlet and the aquaculture tank through pipelines, the coil outlet is connected to the static tank, the coil bend is connected to a precipitant solution nozzle, the precipitant solution nozzle enters the coil obliquely upward, forms an angle of 15° with the horizontal plane, and the precipitant solution nozzle is connected to the precipitant tank.

[0007] A fixed bottom plate is obliquely arranged at the lower part of the static cabin and a movable bottom plate is horizontally arranged. The fixed bottom plate is located above the movable bottom plate. One end of the fixed bottom plate is fixedly connected to the cabin side wall, and the other end is suspended in the first direction. One end of the movable bottom plate is in contact with the cabin side wall, and the other end is suspended in the second direction. The first direction is opposite to the second direction. A rack is fixed on the upper surface of the suspended end of the movable bottom plate. The rack cooperates with the gear, and the gear is fixed to the cabin wall.

[0008] A pump head device is provided in the static cabin and is located above the fixed bottom plate. The inlet of the nuclear radiation secondary detection device is connected to the pump head device, and the outlet of the secondary detection device is respectively connected to the coil and the breeding cabin through pipelines.

[0009] The above-mentioned aquaculture method using nuclear purified seawater, further, has the inner diameter of the coil pipe not less than 1m, the bending radius not less than 1.5m, the precipitant solution nozzle is arranged at each bend in the bow direction, and the precipitant solution is sprayed into the coil pipe at a speed of not less than 1m / s.

[0010] In the above-mentioned aquaculture method using nuclear purified seawater, further, a seawater pump is arranged at the bottom of the ship, below the waterline.

[0011] In the above-mentioned aquaculture method using nuclear purified seawater, further, a nuclear radiation primary detection device is arranged above the nuclear purification cabin.

[0012] In the above-mentioned aquaculture method utilizing nuclear purification of seawater, further, the precipitant tank is composed of a precipitant solid tank and a precipitant solution tank, and the precipitant solution tank is located above the precipitant solid tank.

[0013] The above-mentioned aquaculture method using nuclear purified seawater further has a pipeline connecting the precipitant solution tank and the static tank.

[0014] In the above-mentioned aquaculture method using nuclear purification of seawater, further, the precipitant is composed of sodium carbonate, sodium phosphate, aluminum hydroxide, a coagulant aid, and silicon dioxide.

[0015] In the above-mentioned aquaculture method using nuclear purified seawater, further, the pump head device is at least 1.5m higher than the highest point of the fixed bottom plate.

[0016] The above-mentioned aquaculture method using nuclear purified seawater further comprises a filter screen disposed below the movable bottom plate and the fixed bottom plate, and the circulating water pump is connected to the space below the filter screen through a pipeline.

[0017] The beneficial effects of the present invention are: The seawater entering the aquaculture ships is tested for nuclear radiation, and only the seawater that does not exceed the nuclear radiation standard will be injected into the aquaculture cabin.

[0018] Nuclear purification operations are carried out on seawater with excessive nuclear radiation. By adding precipitants, the radioactive nuclides are formed into precipitates (solids) and thus separated from the seawater.

[0019] During the nuclear purification operation, the ions introduced by the precipitant are a large amount of Na+ ions and a small amount of Al3+ ions, which are common components in seawater and will not cause new pollution to the seawater.

[0020] Seawater with excessive nuclear radiation will be tested for nuclear radiation again after nuclear purification operations. If it exceeds the standard, it will be purified again. If it does not exceed the standard, it will be injected into the aquaculture cabin to ensure the nuclear safety of the seawater in the aquaculture cabin.

[0021] The precipitate formed by the radioactive nuclides is stored separately and processed after the aquaculture ship docks, so as not to cause additional nuclear pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the working of the present invention; Figure 3 It is a schematic diagram of the structure of the precipitant solution nozzle connected to the coil; Figure 4 It is a schematic diagram of the static cabin structure; Figure 5~Figure 8 This is a schematic diagram of the internal workings of the static cabin; Among them: 1-seawater pump, 2-nuclear radiation primary detection device, 3-coil, 4-precipitant tank, 5-precipitant solution tank, 5-1-precipitant solution nozzle, 6-static tank, 7-nuclear radiation secondary detection device, 7-1-pump head device, 8-sedimentation treatment tank, 8-1-filter layer, 91~92-breeding tank, 10-circulating water pump, 11-sediment tank, A-breeding ship, B-sea surface. DETAILED DESCRIPTION

[0023] The present invention will be further described in conjunction with the accompanying drawings.

[0024] The present invention provides a closed aquaculture vessel with seawater nuclear purification capability, which performs aquaculture operations in aquaculture sea areas. Figure 1 As shown, when the aquaculture tank is expected to need water replacement after a certain period of time, the seawater pump is started to start introducing seawater into the aquaculture vessel.

[0025] After the seawater is introduced into the aquaculture vessel, it first enters the nuclear radiation primary detection device. The nuclear radiation primary detection device performs nuclear radiation detection on the incoming seawater: if the nuclear radiation is not exceeded, the seawater is directly injected into the aquaculture cabin; if the nuclear radiation is exceeded, the seawater is injected into the coil.

[0026] Seawater flows in the pipes inside the coil, and the precipitant solution is sprayed into the seawater through the precipitant solution nozzle three times. Figure 3 shown.

[0027] There are two streams of seawater entering the coil: one is the seawater that has been detected by the primary nuclear radiation detection device to have excessive nuclear radiation; the other is the seawater that has been detected by the secondary nuclear radiation detection device to have excessive nuclear radiation.

[0028] The pipe in the coil has an inner diameter of not less than 1m and a bending radius of not less than 1.5m. A precipitant solution nozzle is provided at each bend in the bow direction, and the precipitant nozzle is at an angle of 15° to the horizontal plane. The present invention shows a total of three precipitant solution nozzles, which can actually be set according to the space in the aquaculture cabin. The precipitant solution nozzle sprays the precipitant solution into the coil pipe at a speed of not less than 1m / s to ensure sufficient contact between the precipitant solution and seawater.

[0029] The purpose of spiraling the pipe inside the coil is to make the pipe have sufficient length. The purpose is: first, to increase the resistance of the pipe, which can slow down the flow rate of seawater inside it, thereby increasing the contact time between seawater and precipitant solution; second, to increase the volume of seawater in the pipe, thereby increasing the contact volume between seawater and precipitant solution. The above two reasons are ultimately to achieve the purpose of sufficient contact between seawater and precipitant solution.

[0030] The precipitant solution is obtained by dissolving the precipitant stored in the precipitant tank in seawater whose nuclear radiation does not exceed the standard in the precipitant solution tank.

[0031] The precipitant composition is: a large amount of sodium carbonate Na 2 CO 3 and sodium phosphate 3 PO 4 , a small amount of aluminum hydroxide Al(OH) 3 .

[0032] Therefore, the composition of the precipitant solution is excluding the original ions in seawater: Na + 、Al 3+ , CO 3 2- OH - ,PO 4 3- .

[0033] After the precipitant solution is sprayed into the seawater in the coil, the radioactive strontium, cobalt, cesium, ruthenium and other ions in the seawater react with the CO in the precipitant solution. 3 2- OH - ,PO 4 3- The ions generate insoluble precipitates. Driven by the flow rate of seawater in the coil, these precipitates enter the static chamber together with the seawater. Figure 4 shown.

[0034] The bottom of the static cabin is provided with a fixed bottom plate and a movable bottom plate. In this example, the movement of the movable bottom plate is achieved by gear rack drive. In the specific implementation process, electric, pneumatic, hydraulic and other methods can be used according to actual conditions.

[0035] The seawater mixed with radioactive element sediment in the coil area enters the static tank through the pipeline. The entry position is located at the bottom of the static tank. Specifically, the top of the pipeline from the coil area to the static tank is not higher than the highest point of the fixed bottom plate, such as Figure 4 As shown in the figure, H1≤H2.

[0036] After the seawater mixed with radioactive element sediment enters the static tank, the sedimentation tank adds coagulant into the static tank. The coagulant can absorb the sediment and accelerate the sinking process of the sediment in the seawater, so that the sediment in the seawater falls on the fixed bottom plate and the movable bottom plate. Figure 5 The fixed bottom plate has an inclination angle of not less than 10°, so that the sediment on the fixed bottom plate gathers towards the movable bottom plate under the action of its own gravity. Figure 5 shown.

[0037] The precipitant tank injects a coagulant into the static tank. The main component of the coagulant is silicon dioxide SiO 2 , coagulant can absorb sediment in seawater, accelerate the sedimentation of sediment, and thus accelerate the stratification of seawater and sediment. Seawater is in the upper part of the static tank, and sediment is deposited on the bottom of the tank. Under the action of the fixed bottom plate at the bottom of the static tank, the sediment slides to the movable bottom plate under the action of its own gravity.

[0038] The pump head device of the nuclear radiation secondary detection device sucks away the clear seawater on the top of the static tank for nuclear radiation detection: if the nuclear radiation detected is not excessive, the seawater is directly injected into the aquaculture tank; if the nuclear radiation detected is excessive, the seawater is injected back into the coil and the nuclear purification operation is repeated. Figure 5 shown.

[0039] After the pump head device absorbs the clear seawater on the top of the still tank, the movable bottom plate at the bottom of the still tank is opened, and the remaining seawater and the sediment at the bottom of the still tank enter the sedimentation treatment tank together. Figure 6 and Figure 7 shown.

[0040] There is a filter layer in the sedimentation tank. Under the action of the filter layer, the seawater is filtered to the bottom of the filter layer, and the sediment remains above the filter layer. The seawater below the filter layer is pumped back to the nuclear radiation primary detection device for nuclear radiation detection through a circulating water pump; the sediment above the filter layer remains on the filter layer, and after accumulating to a certain volume, it is collected and stored in the sedimentation tank. Figure 8 shown.

[0041] At this point, the nuclear purification operation of the closed aquaculture vessel with seawater nuclear purification capability of the present invention is completed. The aquaculture cabin receives seawater with no excessive nuclear radiation detected from the nuclear radiation primary detection device and the nuclear radiation secondary detection device for aquaculture use, thereby ensuring the safety of the aquacultured seafood.

Claims

1. A method for aquaculture using nuclear purified seawater, characterized in that: The designer has a nuclear purification cabin in the aquaculture ship. Coils are arranged from top to bottom in the cabin. A precipitant solution is connected to the coils. The seawater pump sends seawater to the nuclear radiation primary detection device for detection. After the primary nuclear radiation detection is qualified, the seawater enters the aquaculture cabin through the pipeline. Otherwise, the seawater enters the coil again and enters the static cabin through the coil, waiting for the secondary nuclear radiation detection. After the secondary detection is qualified, the qualified seawater is sent to the aquaculture cabin, otherwise, it circulates back to the coil, and enters the static cabin again through the coil filtration.

2. A method for aquaculture using nuclear purified seawater according to claim 1, characterized in that: A nuclear radiation primary detection device, a precipitant tank, and a nuclear radiation secondary detection device are fixed on the deck. The inlet of the nuclear radiation primary detection device is connected to the seawater pump through a pipeline, and the outlet of the nuclear radiation primary detection device is connected to the coil inlet and the breeding tank through pipelines. The coil outlet is connected to the static tank, and a precipitant solution nozzle is connected to the bend of the coil. The precipitant solution nozzle enters the coil obliquely upward, forming an angle of 15° with the horizontal plane, and the precipitant solution nozzle is connected to the precipitant tank; A fixed bottom plate is obliquely arranged at the lower part of the static cabin, and a movable bottom plate is transversely arranged, the fixed bottom plate is located above the movable bottom plate, one end of the fixed bottom plate is fixedly connected to the cabin side wall, and the other end is suspended in the first direction, one end of the movable bottom plate is in contact with the cabin side wall, and the other end is suspended in the second direction, the first direction is opposite to the second direction, a rack is fixed on the upper surface of the suspended end of the movable bottom plate, the rack is matched with a gear, and the gear is fixed on the cabin wall; A pump head device is provided in the static cabin and is located above the fixed bottom plate. The inlet of the nuclear radiation secondary detection device is connected to the pump head device, and the outlet of the secondary detection device is connected to the coil and the breeding cabin respectively through pipelines.

3. A method for aquaculture using nuclear purified seawater according to claim 1, characterized in that: The inner diameter of the coil pipe is not less than 1m, and the bending radius is not less than 1.5m. The precipitant solution nozzle is set at each bend in the bow direction, and the precipitant solution is sprayed into the coil pipe at a speed of not less than 1m / s.

4. A method for aquaculture using nuclear purified seawater according to claim 2, characterized in that: The seawater pump is installed at the bottom of the ship, below the waterline.

5. A method for aquaculture using nuclear purified seawater according to claim 2, characterized in that: The initial nuclear radiation detection device is installed above the nuclear purification chamber.

6. A method for aquaculture using nuclear purified seawater according to claim 1, characterized in that: The precipitant tank is composed of a precipitant solid tank and a precipitant solution tank, and the precipitant solution tank is located above the precipitant solid tank.

7. A method for aquaculture using nuclear purified seawater according to claim 6, characterized in that: A pipeline is connected between the precipitant solution tank and the static tank.

8. A method for aquaculture using nuclear purified seawater according to claim 1, characterized in that: The precipitant consists of sodium carbonate, sodium phosphate, aluminum hydroxide, a coagulant aid and silicon dioxide.

9. A method for aquaculture using nuclear purified seawater according to claim 2, characterized in that: The pump head device is at least 1.5m above the highest point of the fixed base plate.

10. A method for aquaculture using nuclear purified seawater according to claim 2, characterized in that: Filters are arranged below the movable bottom plate and the fixed bottom plate, and a circulating water pump is connected to the space below the filter through a pipeline.

Images