Closed culture work ship capable of carrying out seawater nuclear purification

Abstract

A nuclear purification cabin is arranged in the breeding work ship, 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 breeding cabin through a pipeline, and otherwise, the seawater enters the breeding 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 present application belongs to the field of offshore aquaculture work ship design and construction, and particularly relates to a closed type aquaculture work ship capable of seawater nuclear purification. BACKGROUND

[0002] Whether seawater is clean enough is the focus of the offshore aquaculture industry, and is related to food safety and the scientific and sustainable development of China's blue granary industry.

[0003] With the event of nuclear waste water or even nuclear sewage being discharged into the sea, whether the cleanliness of seawater can meet the requirements of offshore aquaculture is increasingly concerned.

[0004] At present, there is an urgent need for a coastal aquaculture device capable of purifying nuclear sewage to solve the great impact of nuclear sewage discharge on coastal aquaculture. Aquaculture work ships are divided into open type aquaculture work ships and closed type aquaculture work ships. The closed type aquaculture work ship is very suitable for increasing the nuclear purification function, thereby solving the influence of nuclear sewage discharge on the coastal aquaculture industry. SUMMARY

[0005] To solve the above problems, the present application provides a closed type aquaculture work ship capable of seawater nuclear purification, which injects seawater that has been subjected to nuclear purification and has passed detection into the aquaculture cabin to ensure the nuclear safety of the cultured fish. The technical scheme adopted is:

[0006] A closed type aquaculture work ship capable of seawater nuclear purification, the aquaculture work ship is designed with a nuclear purification cabin, a coil is arranged in the nuclear purification cabin from top to bottom, a precipitant solution is connected into the coil, seawater is pumped into a nuclear radiation primary detection device for detection, after the nuclear radiation primary detection is qualified, the seawater enters the aquaculture cabin through a pipeline, otherwise, the seawater enters the coil again, enters a standing cabin through the coil, waits for nuclear radiation secondary detection, after the secondary detection is qualified, the qualified seawater is sent into the aquaculture cabin, otherwise, it is recycled back to the coil and enters the standing cabin again through the coil.

[0007] The closed type aquaculture work ship capable of seawater nuclear purification is further fixed with a nuclear radiation primary detection device, a precipitant cabin and a nuclear radiation secondary detection device on the deck, the inlet of the nuclear radiation primary detection device is connected with the seawater pump through a pipeline, the outlet of the nuclear radiation primary detection device is connected with the inlet of the coil and the aquaculture cabin through a pipeline respectively, the outlet of the coil is connected into the standing cabin, a precipitant solution nozzle is connected at the elbow of the coil, the precipitant solution nozzle enters the coil obliquely upward and forms an angle of 15° with the horizontal plane, and the precipitant solution nozzle is connected with the precipitant cabin.

[0008] The lower part of the static chamber has a fixed base plate inclined at an angle and a movable base plate horizontally arranged. The fixed base plate is located above the movable base plate. One end of the fixed base plate is fixedly connected to the side wall of the chamber, and the other end is suspended in the first direction. One end of the movable base plate is in contact with the side wall of the chamber, 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 base plate. The rack and a gear are engaged. The gear is fixed to the chamber wall.

[0009] The settling chamber is equipped with a pump head device located above the fixed base plate. The inlet of the secondary nuclear radiation detection device is connected to the pump head device, and the outlet of the secondary detection device is connected to the coil and the aquaculture chamber through pipelines.

[0010] Furthermore, the aforementioned enclosed aquaculture vessel capable of purifying seawater further features a coil with an inner diameter of not less than 1m and a bending radius of not less than 1.5m. The precipitant solution nozzles are positioned at each bend in the bow direction, spraying the precipitant solution into the coil at a speed of not less than 1m / s.

[0011] Furthermore, the aforementioned enclosed aquaculture vessel capable of nuclear purification of seawater has its seawater pump installed at the bottom of the vessel, below the waterline.

[0012] Furthermore, the aforementioned enclosed aquaculture vessel capable of nuclear purification of seawater has an initial nuclear radiation detection device installed above the nuclear purification chamber.

[0013] Furthermore, the aforementioned enclosed aquaculture vessel capable of seawater nuclear purification further comprises a precipitant tank consisting of a solid precipitant tank and a precipitant solution tank, with the precipitant solution tank located above the solid precipitant tank.

[0014] Furthermore, the aforementioned enclosed aquaculture vessel capable of purifying seawater via nuclear filtration has a pipeline connecting the precipitant solution tank and the settling tank.

[0015] Furthermore, the aforementioned enclosed aquaculture vessel capable of purifying seawater further comprises a precipitant composed of sodium carbonate, sodium phosphate, aluminum hydroxide, coagulant aid, and silica.

[0016] Furthermore, the aforementioned enclosed aquaculture vessel capable of seawater nuclear purification has its pump head device positioned at least 1.5 meters above the highest point of the fixed bottom plate.

[0017] Furthermore, the aforementioned enclosed aquaculture vessel capable of purifying seawater via nuclear filtration has a filter screen installed below the movable and fixed bottom plates, with a circulating water pump connected to the space below the filter screen via pipelines.

[0018] The beneficial effects of this invention are:

[0019] Seawater entering the aquaculture vessel is tested for nuclear radiation, and only seawater with nuclear radiation levels below the standard is injected into the aquaculture tank.

[0020] The seawater with excessive nuclear radiation is subjected to nuclear purification operation, and the radionuclide is formed into a precipitate (solid) by adding a precipitant, so as to be separated from the seawater.

[0021] 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 seawater.

[0022] The seawater with excessive nuclear radiation is subjected to nuclear purification operation, and the radionuclide is formed into a precipitate (solid) by adding a precipitant, so as to be separated from the seawater.

[0023] The precipitate formed by the radionuclide is stored separately and specially, and is treated after the aquaculture work ship is docked, so as not to cause additional nuclear pollution. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic diagram of the present application;

[0025] Figure 2 is a working schematic diagram of the present application;

[0026] Figure 3 is a structural schematic diagram of the precipitant solution spray head connected to the coil;

[0027] Figure 4 is a structural schematic diagram of the standing cabin;

[0028] Figures 5 to 8 is a working schematic diagram of the inside of the standing cabin;

[0029] Wherein: 1-seawater pump, 2-primary nuclear radiation detection device, 3-coil, 4-precipitant cabin, 5-precipitant solution cabin, 5-1-precipitant solution spray head, 6-standing cabin, 7-secondary nuclear radiation detection device, 7-1-pump head device, 8-precipitate treatment cabin, 8-1-filter layer, 91~92-aquaculture cabin, 10-circulating water pump, 11-precipitate cabin, A-aquaculture work ship, B-sea surface. DETAILED DESCRIPTION

[0030] The present application is further described in combination with the drawings.

[0031] The present application is further described in combination with the drawings. Figure 1 As shown, when the aquaculture cabin needs to be replaced with water after a certain period of time, the seawater pump is started to begin to introduce seawater into the aquaculture work ship.

[0032] After the seawater is introduced into the aquaculture work ship, it firstly enters the nuclear radiation primary detection device. The nuclear radiation primary detection device detects the nuclear radiation of the entering seawater. If the detected nuclear radiation is not over standard, the seawater is directly injected into the aquaculture cabin. If the detected nuclear radiation is over standard, the seawater is injected into the coil pipe.

[0033] The seawater flows in the pipeline of the coil pipe, and the precipitator solution is sprayed into the seawater through the precipitator solution spray head for three times. Figure 3

[0034] Two flows of seawater enter the coil pipe: one is the seawater whose nuclear radiation is over standard detected by the nuclear radiation primary detection device; and the other is the seawater whose nuclear radiation is over standard detected by the nuclear radiation secondary detection device.

[0035] The pipeline in the coil pipe has an inner diameter not less than 1m and a bending radius not less than 1.5m. At each bending position in the bow direction, a precipitator solution spray head is arranged, and the precipitator spray head is at an angle of 15° with the horizontal plane. The present application shows three precipitator solution spray heads, and in fact, the actual number of the precipitator solution spray heads can be set according to the space in the cabin of the aquaculture work ship. The precipitator solution spray head sprays the precipitator solution into the pipeline of the coil pipe at a speed not less than 1m / s, so as to ensure the sufficiency of the contact between the precipitator solution and the seawater.

[0036] The coil pipe is spirally arranged in the pipeline, so as to have sufficient length. The purposes are: one is to increase the resistance of the pipeline, so as to slow down the flow speed of the seawater in the pipeline, thereby increasing the contact time of the seawater and the precipitator solution; and the other is to increase the volume of the seawater in the pipeline, thereby increasing the contact volume of the seawater and the precipitator solution. The above two reasons are ultimately for the purpose of the sufficient contact between the seawater and the precipitator solution.

[0037] The precipitator solution is obtained by dissolving the precipitator stored in the precipitator cabin in the seawater whose nuclear radiation is not over standard in the precipitator solution cabin.

[0038] The components of the precipitator are: a large amount of sodium carbonate Na2CO3 and sodium phosphate Na3PO4, and a small amount of aluminum hydroxide Al(OH)3.

[0039] Therefore, the components of the precipitator solution do not consider the original ions in the seawater: Na + , Al 3+ , CO3 2- , OH - , PO4 3- .

[0040] After the precipitator solution is sprayed into the seawater in the coil pipe, the radioactive ions of strontium, cobalt, cesium and ruthenium in the seawater react with CO3 2- , OH - , PO4 3- ​The ions generate insoluble precipitates. Under the driving of the flow rate of the seawater in the coil pipe, the precipitates enter the static tank together with the seawater. As shown in Figure 4 .

[0041] The bottom of the static tank is provided with a fixed bottom plate and a movable bottom plate. In the example, the movement of the movable bottom plate is achieved by a rack and pinion drive. In actual implementation, electric, pneumatic, hydraulic and other modes can be used according to actual conditions.

[0042] The seawater mixed with the precipitates of the radioactive elements in the coil pipe area enters the static tank through the pipeline. The entering position is at the bottom of the static tank. Specifically, the pipeline of the coil pipe area entering the static tank is not higher than the highest point of the fixed bottom plate, as shown in Figure 4 , where H1≤H2.

[0043] After the seawater mixed with the precipitates of the radioactive elements enters the static tank, the coagulant aid tank adds coagulant aid into the static tank. The coagulant aid can adsorb the precipitates and accelerate the sinking process of the precipitates in the seawater, so that the precipitates in the seawater fall on the fixed bottom plate and the movable bottom plate. As shown in Figure 5 . The fixed bottom plate has an inclination angle of not less than 10°, so that the precipitates on the fixed bottom plate gather at the movable bottom plate under the action of their own gravity. As shown in Figure 5 .

[0044] The coagulant aid tank injects coagulant aid into the static tank. The main component of the coagulant aid is silicon dioxide SiO2. The coagulant aid can adsorb the precipitates in the seawater, accelerate the precipitation of the precipitates, and thus accelerate the stratification of the seawater and the precipitates. The seawater is in the upper part of the static tank, and the precipitates are deposited at the bottom of the tank. Under the action of their own gravity, the precipitates slide to the movable bottom plate under the action of the fixed bottom plate at the bottom of the static tank.

[0045] The pump head device of the secondary nuclear radiation detection device sucks away the clear seawater in the upper part of the static tank for nuclear radiation detection. If the detected nuclear radiation is not over standard, the seawater is directly injected into the culture tank; if the detected nuclear radiation is over standard, the seawater is injected back into the coil pipe for re-nuclear purification operation. As shown in Figure 5 .

[0046] After the pump head device finishes sucking the clear seawater in the upper part of the static tank, the movable bottom plate at the bottom of the static tank is opened, and the residual seawater and the precipitates at the bottom of the static tank enter the precipitate treatment tank together. As shown in Figure 6 and Figure 7 .

[0047] The filter layer is arranged in the sediment treatment cabin. Under the action of the filter layer, seawater is filtered to the lower side of the filter layer, and the sediment is left on the upper side of the filter layer. The seawater on the lower side of the filter layer is injected back to the nuclear radiation primary detection device for nuclear radiation detection by a circulating water pump. The sediment on the upper side of the filter layer is left on the filter layer, and is collected and stored in the sediment cabin when the volume of the sediment reaches a certain volume. Figure 8

[0048] At this point, the nuclear purification operation of the closed type aquaculture factory ship with seawater nuclear purification capability is completed. The aquaculture cabin receives seawater with a detected nuclear radiation not exceeding the standard from the nuclear radiation primary detection device and the nuclear radiation secondary detection device, and supplies the seawater for aquaculture, thereby ensuring the safety of the farmed marine products.​

Claims

1. A closed type farming factory ship which can purify seawater by nuclear, characterized in that, The deck is fixed with a nuclear radiation primary detection device, a precipitant cabin, and a nuclear radiation secondary detection device. The inlet of the nuclear radiation primary detection device is connected with the seawater pump through a pipeline. The outlet of the nuclear radiation primary detection device is connected with the coil inlet and the breeding cabin through a pipeline respectively. The coil outlet is connected into the static cabin. The coil elbow is connected with a precipitant solution nozzle. The precipitant solution nozzle is obliquely upward into the coil, and forms a 15° angle with the horizontal plane. The precipitant solution nozzle is connected with the precipitant cabin. The lower part of the static cabin is obliquely provided with a fixed bottom plate and a movable bottom plate. The fixed bottom plate is located above the movable bottom plate. One end of the fixed bottom plate is fixedly connected with 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. The suspended end of the movable bottom plate is fixedly provided with a rack. The rack is matched with a gear. The gear is fixed on the cabin wall. The static cabin is provided with a pump head device. The pump head device is located above the fixed bottom plate. The inlet of the secondary detection device is connected with the pump head device. The outlet of the secondary detection device is connected with the coil and the breeding cabin through a pipeline.

2. A closed type fish farming vessel capable of purifying seawater according to claim 1, wherein The pipeline inner diameter of the coil is not less than 1 m. The bending radius is not less than 1.5 m. The precipitant solution nozzle is arranged at each bending position in the bow direction. The precipitant solution nozzle sprays the precipitant solution into the pipeline at a speed of not less than 1 m / s.

3. A closed type fish farming vessel capable of purifying seawater according to claim 1, wherein The seawater pump is arranged at the bottom of the ship below the waterline.

4. The closed type fish farming vessel capable of purifying seawater according to claim 1, wherein The nuclear radiation primary detection device is arranged above the nuclear purification cabin.

5. The closed type fish farming vessel capable of purifying seawater according to claim 1, wherein The precipitant cabin is composed of a precipitant solid cabin and a precipitant solution cabin. The precipitant solution cabin is located above the precipitant solid cabin.

6. A closed type fish farming vessel capable of nuclear decontamination with seawater according to claim 5, characterized in that, A pipeline is connected between the precipitant solution cabin and the static cabin.

7. The closed type fish farming vessel capable of purifying seawater according to claim 1, wherein The pump head device is higher than the highest point of the fixed bottom plate by at least 1.5 m.

8. The closed type fish farming vessel capable of purifying seawater according to claim 1, wherein, The movable bottom plate and the fixed bottom plate are provided with a filter screen below. The circulating water pump is connected into the space below the filter screen through a pipeline.

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