79 results about "Seawater quality" patented technology

The invention discloses a method for synchronous desulfurization and denitrification of marine vessel exhaust, which belongs to the field of the air pollution control and the marine vessel exhaust emission control. In the method, exhaust passes through a spray humidification and cooling zone, an ozone decomposition and free radical oxidation zone and a seawater washing zone in sequence, thereby realizing synchronous desulfurization and denitrification. The spray humidification and cooling zone which consists of a small seawater pump, an exhaust humidification and cooling pipeline and a spray nozzle can humidify and cool the exhaust; the ozone decomposition and free radical oxidation zone which consists of an ozone decomposition and free radical oxidation device, an ultraviolet lamp and an ozone generator can rapidly convert SO2 and NO into hydroxyl acid and nitric acid through hydroxyl and the like; and the seawater washing zone which consists of a seawater washing tower, a filler and a large seawater pump can convert the hydroxyl acid and the nitric acid into sulfate and nitrate and discharge the exhaust and washing water meeting standards. The synchronous desulfurization and denitrification system formed through the invention has the advantages that the size is small, no seawater quality restoration system and raw material storage and transportation are needed, the products can be directly discharged into the sea, and the like.

The invention discloses a distributed water depth prediction method based on GWR (geographically weighted regression) and a BP (back propagation) neural network. The method comprises the following steps: firstly, preprocessing a remote sensing image; secondly, establishing sampling data based on an actually measured water depth value acquired by a laser radar and DN (digital number) values of blue and green wavebands of corresponding coordinate points in the remote sensing image; thirdly, dividing a to-be-predicted region into a plurality of sub-regions based on the GRW method and establishing a neural network water depth predication model of each sub-region; finally, designing weighting factors of the neural network water depth prediction models of all regions around each to-be-predicted point in the to-be-predicted region to establish a distributed neutral network water depth prediction model of the whole to-be-predicted region. Therefore, the distributed water depth prediction method is not influenced by seawater quality, seabed type or space diversity, can quickly and conveniently establish a nonlinear relationship between the multispectral remote sensing image and the actual water depth value, and has a very good practical value for prediction of shallow water depth.

The invention relates to a marine culture water compound cyclic purification system which comprises an initial precipitation unit, a contact oxidation unit, a shellfish ecological pond unit and a plug flow type constructed wetland unit. The marine culture effluent enters into the initial precipitation unit to precipitate and then a mass of suspended solids are removed; ammoniation and nitration reactions are realized by the initial precipitation unit through microbial action; the effluent of the contact oxidation unit is conditioned by the shellfish ecological pond unit; the matrixes filled in the plug flow type constructed wetland unit is capable of absorbing and gathering the nitrogen and phosphorus pollutants in the water; and after the cyclic treatment, the water flows back to a marine culture pond. According to the seawater quality treatment system, the biological treatment technology, the ecological restoration technology and the ecological treatment technology are integrated and the advantages of the three technologies can be fully exploited, so that the effect of compound purification is achieved and the maximization of the comprehensive benefit is promoted.

The invention discloses a sampling device for ocean monitoring of the quality of seawater at different depths. The device includes a base, wherein bottom portions of four side surfaces of the base areequipped with mounting tabs, a top end of the base is connected with a rotation seat, and one end of the rotation seat is connected with a mounting plate. The device is advantaged in that the structure is scientific and reasonable and is safe and convenient to use, when a sampling bucket is lowered, all solenoid valves are opened by a control switch, the seawater passes through a seawater sampling bin, the seawater at the sampling position can be sampled; when the sampling bucket is lowered, the corresponding solenoid valves are closed by the control switch to sample at different depth positions, a rotating handle is taken out by opening a storage cover, one end of the rotating handle is mounted on a hexagonal rotating block, the rotating handle is turned to drive the hexagonal rotating block and a rotating shaft to rotate, a cable storage roller can be driven to rotate, when a driving motor fails, the cable storage roller can be manually driven to rotate, and the sampling bucket is pulled out of the sea.

The invention discloses a seawater quality sampling device with different depths for ocean monitoring. The device comprises a mounting plate; a mounting bracket is fixedly connected to the mounting plate; a cable take-up roller is rotationally connected to the mounting bracket; a power mechanism is arranged between the cable take-up roller and the mounting plate; a supporting frame is fixedly connected to the mounting bracket; the free end of the cable is fixedly connected with a connecting block; the other end, away from the cable, of the connecting block is fixedly connected with a sampler;six sampling grooves are formed in the upper end of the sampler in a penetrating mode, plugging mechanisms are arranged in the six sampling grooves, four connecting rods are fixedly connected to the bottom of the sampler, a balancing weight is fixedly connected to the bottoms of the four connecting rods jointly, and standby power equipment connected with the cable take-up roller is arranged on themounting plate. The seawater sampling device is reasonable in structure, capable of sampling seawater at different depths at a time, lower in production cost, better in practicability and safer.

The invention provides a multifunctional ocean water quality monitoring device. The multifunctional ocean water quality monitoring device comprises a water quality monitoring floating pontoon, a storage hoop, a supporting rod, a solar panel, an intelligent displaying apparatus, a seawater quality detection apparatus, a seawater classified storage apparatus, a supporting frame, a driving motor, a winding shaft, a guiding rope, a seawater collection apparatus, a flotage fishing apparatus, a battery mounting plate, a storage battery, a warning ball structure and a photovoltaic controller, whereinthe storage hoop is welded on the left side and the right side of the front surface of the water quality monitoring floating pontoon. By arranging an electromagnetic valve, a shallow water level collection bottle and a deep water level collection bottle, the electromagnetic valve can be opened when in a shallow water level or a deep water level, and the seawater at the shallow water level or thedeep water level can be sampled; by arranging a seawater quality sensor, a seawater temperature sensor and a seawater salinity sensor, the sweater in a detection hopper can be conveniently detected; and by arranging a classification tag, the seawater can be stored in a classifying manner, and the seawater is easy to classify when in storage and fetching.

The present invention relates to a stairs-type hydrophilic revetment block having seawater flow ports and a construction method thereof. The existing coastal breakwaters, embankment, revetments, etc. are constructed to pacify the sea areas. However, because of occlusiveness of their structure, seawater flow is significantly reduced and pollutants are accumulated without being diffused to the open sea. As a result, the self-cleaning action is interrupted and the benthic ecosystem is in danger of being destroyed due to oxygen deficiency as the accumulated organic materials are decomposed. And, the conventional structures are designed and constructed mainly to block waves in order to pacify the sea areas and protect harbor facilities. In contrast, the stairs-type hydrophilic revetment block having seawater flow ports of the present invention provides easy access for people, reduces reflected waves, pacify the sea areas, maximizes improvement of seawater quality through smooth inflow and outflow of seawater and reduces cost needed for setup and protection of mound. The hydrophilic revetment block of the present invention comprises a base block, an intermediate block and an intermediate block having reservoirs. The present invention also provides a construction method using the revetment block.

The invention discloses a method for integrated desulfurization and denitration for marine ship exhaust, and belongs to the fields of air pollution control and marine ship exhaust control. The exhaust passes through an atomizing humidification and cooling area, a discharging oxidation area and a seawater washing area in turn to complete the integrated desulfurization and denitration. The exhaust is humidified and cooled by the atomizing humidification and cooling area consisting of a small seawater pump, an exhaust humidifying and cooling pipe and a nozzle; SO2 and NO are converted into sulfuric acid and nitric acid by massive HO2, OH and other oxidative free radicals in the charging oxidation area consisting of a plasma generator; and the sulfuric acid and nitric acid are converted into sulfate and nitrate by the seawater washing area consisting of a seawater washing tower, a filler and a large seawater pump, and the exhaust meeting the standard and washing water are discharged. The integrated desulfurization and denitration system has the advantages of low energy consumption, small volume, low price, no need of a seawater quality restoring system or raw material storage and transportation, direct discharge of products into sea and the like.

The invention discloses a film method aeration industrial flue gas desulfurization seawater recovery process. Industrial flue gas desulfurization seawater sequentially passes through a water distribution area for mixing with fresh seawater, a noncorrosive pump, a seawater flow control element to enter a hydrophobicity hollow fiber absorber shell side (pipe side). Gas containing oxygen is generated through a gas source generation device, passes through a gas flow control element to enter a hydrophobicity hollow fiber absorber pipe side (pipe shell). A gas phase and a liquid phase are not directly contacted in a film contactor, and are separated by a hollow fiber film and independently controlled. The gas phase and the liquid phase form a stable mass transferring interface at the position of a micropore of the hollow fiber film by adjusting and controlling the gas flow control element and the seawater flow control element, the gas containing the oxygen enters the desulfurization seawater through the micropore of the film, sulfite of the desulfurization seawater is oxidized to generate stable sulfate, effects of sulfate fixation and seawater quality recovery are achieved. Compared with the prior art, the film method aeration industrial flue gas desulfurization seawater recovery process uses closed aeration and has the advantages of being free of SO2 escaping, high in efficiency, small in power consumption, small in land occupation, flexible in installation, convenient to integrate and magnify and the like.

The invention provides a circulating water treatment method of seawater for aquaculture, which includes the following steps: A, the aquaculture water discharged from the aquaculture pond, using a purification box to perform preliminary purification and sewage discharge of the aquaculture water, B, using electrocatalytic oxidation The device ionizes the culture water and decomposes the organic matter, C. uses the purification tank and the aeration pump to oxygenate the culture water, and D. uses the multi-stage fine filter to filter and activate the culture water. The aquaculture water enters the water storage tank and is introduced into the aquaculture pond through a water pump. The present invention solves the pollution of the above-mentioned toxic and harmful substances to the breeding circulating seawater by decomposing ammonia nitrogen, nitrite, and organic matter in the circulating seawater and killing bacteria and viruses in the water, and solves the problem by aeration of the purification pool and multi-stage fine filtration. The problem of poor activity of circulating seawater optimizes the quality of aquaculture water, and the quality of purified seawater is suitable for the recycling of aquatic products.

The invention discloses a processing technology for purifying pollutants in four kinds of hard-shelled seawater shellfish by adopting an ultraviolet seawater treatment technique, wherein the four kinds of hard-shelled seawater shellfish include Ruditapes philippinarum, Meretrix meretrix Linnaeus, Cyclina sinensis and Tegillarca granosa. The technology provided by the invention adopts a semi-closed circulating system and the processing is conducted in a room with environmental temperature capable of being regulated. The technology is implemented through the following six steps of: selecting shellfish, cleaning the shellfish, containing the shellfish in a basket and placing the basket into a purifying pond; pumping deep-well seawater with seawater quality which satisfies the requirement into a circulating water pond; pumping the deep-well seawater into an ultraviolet sterilizer for sterilization through a water pump; spraying the sterilized seawater into the purifying pond to purify the shellfish according to technological parameters; draining return water into the circulating water pond for recirculation; and completing the purification technological process of one batch till the hygienic quality standard on the shellfish is met or after the minimum purification time which is 24 hours. The processing technology has the advantages that the pollutant removing effect is remarkable, the vitality of the shellfish after purification is strong, the technology is simple, the investment is small and the like.

The invention discloses a probe assembly for monitoring seawater quality, which belongs to the technical field of environment monitoring. The probe assembly comprises an outer shell, a protection shell and a protection sleeve, wherein the bottom of the outer protection shell is provided with a storage box, the bottom of the storage box is provided with an openable and closable bottom cover, poresare uniformly formed in the bottom cover, the protection sleeve is arranged outside the protection shell in a sleeving manner, and the protection sleeve consists of a low-density layer and a high-density layer sleeving the low-density layer. By adopting the probe assembly for monitoring the seawater quality, the material scattering the smell disliked by a breeding object is placed in the storage box on the bottom of the protection shell, after the material is independently dissolved, the material permeates into the protection sleeve, and the protection sleeve sleeves the outer side of the protection shell, so that in a monitoring process, the breeding object does not approach the probe assembly, the data deviation caused by the swinging of the breeding object around the probe assembly in the monitoring process can be avoided, and the damage problem of the probe caused by the collision of the breeding object can be avoided.

The invention belongs to seawater fish cultivation technique, and particularly relates to an overwintering cultivation method of a seawater fish black sea bream net cage. The method specifically comprises the following steps of A, selection of a sea area, that is to say, a seawater quality index conforms to an NY5052-2001 water quality standard of seaculture of pollution-free food, the salinity is 2-3%, the pH value is 7.8-8.6 and the dissolved oxygen is more than 5 mg / L; when the water temperature of the sea area rises to more than 15 DEG C in the following spring, a black sea bream cultivation net cage is slowly hauled back to an open sea area to cultivate; B, selection of the net cable and cultivation density, that is to say, the overwintering cultivation net cage selects a conventional small net cage or a deep water net cage, a plurality of net cages form a net row type structure and are arranged in parallel along the downstream direction; during overwintering cultivation, the cultivation density of the black sea bream net cage is 8-10 g / cm<3>; C, feed selection; D, a feeding method of a feed, that is to say, feeding is not carried out under the conditions of the water temperature in winter of lower than 10 DEG C and rainy days, feeding is carried out at sunny days at more than 10 DEG C, satiation feeding is carried out at 13:30 to 15:30 at one time, and the feeding rate is controlled within 1%-2%. According to the method, successful overwintering of cultivation of the black sea bream net cage is implemented through management of the cultivation method and feed improvement.

The present invention relates to a seawater quality reference prediction method based on a quantitative structure-activity relationship of metal and metalloid. According to the method, the toxic endpoint of unknown metal is predicted according to a quantitative relationship between the structural feature of metallic ions and the marine life acute toxic effect, and a risk concentration for protecting different proportions of marine life is analyzed and deduced in conjunction with sensitivity distribution of different species; and a QSAR metal toxicity prediction model is established by integrating metal physical and chemical structure parameters and toxic mechanisms of different marine life and is applied to prediction of an unknown seawater quality reference maximum concentration. The seawater acute reference prediction method based on the metal quantitative structure-activity relationship is based on the ecology principle; the system screens various marine species and takes the screened marine species as smallest biological prediction sets; and single-parameter toxicity prediction models are established separately, thereby improving the model precision and prediction ability.

The present invention relates to a stairs-type hydrophilic revetment block having seawater flow ports and a construction method thereof. The existing coastal breakwaters, embankment, revetments, etc. are constructed to pacify the sea areas. However, because of occlusiveness of their structure, seawater flow is significantly reduced and pollutants are accumulated without being diffused to the open sea. As a result, the self-cleaning action is interrupted and the benthic ecosystem is in danger of being destroyed due to oxygen deficiency as the accumulated organic materials are decomposed. And, the conventional structures are designed and constructed mainly to block waves in order to pacify the sea areas and protect harbor facilities. In contrast, the stairs-type hydrophilic revetment block having seawater flow ports of the present invention provides easy access for people, reduces reflected waves, pacify the sea areas, maximizes improvement of seawater quality through smooth inflow and outflow of seawater and reduces cost needed for setup and protection of mound. The hydrophilic revetment block of the present invention comprises a base block, an intermediate block and an intermediate block having reservoirs. The present invention also provides a construction method using the revetment block.

The invention discloses a method for predicting ocean fishery resource abundance by integrating multi-source satellite remote sensing and application thereof. The method for predicting comprises the steps of processing the production statistical data of the fishes C in the sea area B in the time period A and the data of the marine environment factors including the seawater quality change and the earth transfer flow acquired by the multi-source satellite remote sensing of the sea area B in the time period A to obtain the data of the CPUE and the marine environment factors of the fishes C in thesea area B in the time period A in time-space synchronization; training and testing a CPUE prediction model established based on a BP neural network by using the obtained data to obtain a final prediction model; and inputting the marine environmental factors of the sea area B fish C in the to-be-predicted time period into the final prediction model to complete the prediction of the CPUE of the sea area B fish C in the to-be-predicted time period. According to the prediction method, the seawater quality change and the ground diversion flow are taken as marine environment factors for the firsttime, so that the prediction precision is improved, the prediction stability is improved, and the prediction method has a great application prospect.

The invention discloses a water quality online intelligent monitoring analysis processing method based on Internet of Things and big data analysis. The method comprises the steps of carrying out the depth sub-region division of an ocean region, and obtaining the biological species, inhabitation density and seawater water body parameters in each depth sub-region, counting the biological richness pollution coefficient and the total biological species water survival pollution coefficient corresponding to each depth sub-region, acquiring basic parameters of the seabed sediment in the ocean region, then counting the pollution coefficient corresponding to the seabed sediment in the ocean region, and acquiring the comprehensive pollution coefficient of the water quality in the ocean region by combining the pollution coefficients. The obtained comprehensive pollution coefficient of the water quality of the ocean region can comprehensively reflect the comprehensive pollution condition of the seawater quality, the defect that the monitoring index of an existing seawater quality monitoring method is too single is overcome, the range of the seawater quality monitoring index is expanded, and the accuracy of the seawater quality monitoring result is improved. The monitoring level of seawater quality is greatly improved.

The invention discloses a marine ecological red line water quality up-to-standard judgment method and device, and belongs to the field of sea water quality monitoring. The method comprises the steps of performing interpolation calculation according to the acquired water quality index of each site, to acquire a water quality index spatial distribution map of a whole area, and clipping by using a sea ecological red line boundary vector to acquire a water quality index spatial distribution map of a sea ecological red line range; performing water quality classification on each interpolation pointin the water quality index spatial distribution map of the sea ecological red line range according to a seawater quality evaluation standard, to acquire spatial distribution maps of different water quality categories; calculating the area of the spatial distribution maps of different water quality categories, and computing a proportion of the spatial distribution area of different water quality categories in the sea ecological red line area; and judging whether the sea red line water quality is up to the standard according to the proportion. According to the method and device, the defect thatin traditional methods, water quality of the single site cannot accurately reflect the whole condition of the surrounding seawater quality is avoided, and the whole water quality condition of the seaarea is reflected to a certain extent.

The invention relates to the technical field of marine simulation. A marine environment and force load coupling experiment simulator comprises a corrosion simulation chamber (12), a seawater storage chamber (3) and a master control box (1); an observation window (18) and a floating ball level gauge are arranged on the side wall of the corrosion simulation chamber (12); a drainage hole is formed atthe bottom of the corrosion simulation chamber (12) and is connected with the seawater storage chamber (3) by a first anti-corrosion pipe (7); a first electromagnetic valve (27), a first flowmeter (36) and a seawater salinity detector (26) are mounted on the first anti-corrosion pipe (7); and a tap water inlet (20), a wave making seawater inlet (35), an automatic salt adder (21) and a stirrer motor (23) are arranged at the top of the corrosion simulation chamber (12). The marine environment and force load coupling experiment simulator has the beneficial effects that corrosion of a stressed component can be simulated and seawater quality can be automatically detected and regulated.

The invention discloses a seawater quality sampling device. The device comprises a water quality sampling device, a counterweight chamber and a floating chamber. The floating chamber, the water quality sampling device and the counterweight chamber are connected in series through ropes. The water quality sampling device comprises a motor, a seal cover, a worm gear, a worm pricking pin pipe and a vacuum sampling tube. The motor is installed in the seal cover. The worm gear is fixed to the motor through a transmission shaft. The worm pricking pin pipe and the worm gear are connected. A worm pricking pin is fixed in a nut at the upper end of the worm pricking pin pipe. The counterweight chamber is provided with several through holes. A gas blowing device is arranged in the counterweight chamber. The floating chamber is a plastic floating drum. The seawater quality sampling device realizes on-line monitoring of seawater and realizes monitoring of quality of water in a special water area and in a laboratory.

The invention discloses a detection device for seawater quality purification. The device comprises a bottom plate, the top of the bottom plate is fixedly connected with a treatment box; the top of thetreatment box is communicated with a water inlet cylinder; the inner wall of the water inlet cylinder is movably connected with a filter screen; and magnetic clamping blocks are fixedly connected tothe two sides of the filter screen, vertical grooves matched with the magnetic clamping blocks are formed in the inner wall of the water inlet cylinder, arc-shaped grooves matched with the magnetic clamping blocks are formed in the positions, located at the bottoms of the vertical grooves, of the inner wall of the water inlet cylinder, and the bottoms of the vertical grooves communicate with the tops of the arc-shaped grooves. According to the detection device for seawater quality purification, the magnetic clamping blocks are matched with the arc-shaped grooves and the vertical grooves, so that the filter screen is more convenient to disassemble and assemble, and the working efficiency is further improved; the RO membrane pipe can deeply filter the seawater, and then the filtered seawatercan be directly pumped to the storage tank through the water pumping pipe, so that the seawater is convenient to use, and the purification effect is good.

The invention discloses a purification treatment method for mariculture tail water emission. Various mariculture tail water is collected in a uniform manner, subjected to aeration treatment through activated sludge, then purified by secondary precipitation and sludge reduction and further subjected to primary biological purification, ammonia nitrogen and nitrogen nitrite are degraded through an active biological film, ruppiaceae-based secondary biological purification and tertiary biological purification composite treatment is further performed, ammonia nitrogen and active phosphate are sufficiently absorbed and utilized, nitrogen, phosphorus and other eutrophic pollutants are efficiently removed, and culture tail water drained after systematic purification treatment is superior to the national second-class seawater quality standard. The method is applicable to purification treatment of fish and prawn mariculture in various manners.

The invention discloses a seawater quality evaluation method. The method comprises: obtaining a brain storm optimization initial value, BP neural network optimization value matching and optimization result verification. Obtaining a brainstorm optimization initial value adopts a brainstorm algorithm in a swarm intelligence optimization algorithm to solve the problem of complex and difficult calculation of a weight value and a threshold value of the BP neural network. BP neural network optimization value matching and optimization result verification are carried out, the optimized BP neural network is adopted to construct a seawater quality evaluation model, historical case data is used to train the model, and when a prediction error is within an allowable range or network training reaches the maximum iteration frequency, training is ended. Prediction result analysis is performed, the trained model is used to evaluate the seawater quality, the root-mean-square error of the evaluation result is smaller than the evaluation result of the traditional BP neural network before optimization, and the evaluation precision is higher. The invention can provide a new solution for seawater qualityevaluation.

A seawater desalination plant system comprises a plant portion producing fresh water from seawater and supplying fresh water to consumers via a water distribution pool (20). In a seawater desalination plant system, a seawater quality prediction means (32) predicts quality of seawater for each predetermined time during a certain definite period based on a past actual measurement value of quality of seawater. In addition, an optimum plan calculation means creates a plurality of proposed plans of fresh water production quantity during the definite period in which fresh water production quantity required for the definite period is allotted to the each predetermined time, calculates, with respect to these, an electric power consumption rate for desalination using the seawater quality predicted for the each predetermined time, the fresh water production quantity, and a previously obtained recovery rate, and obtains an optimum fresh water production quantity plan from the plurality of proposed plans of fresh water production quantity based on this. A display means (36) displays the content of this obtained optimum fresh water production quantity plan.

The invention discloses a seawater micro-plastic online monitoring system. An upper computer controls a laser to emit laser through a light source control panel, the laser acts on a to-be-detected sample to excite a Raman light signal after exciting light emitted by a Raman probe is emitted by a beam splitter, and the excited Raman light signal is reflected by the beam splitter and then collected by the Raman probe; the collected Raman light signals reach the spectrograph through the receiving optical fiber for photoelectric signal conversion, and the upper computer performs data processing on the Raman light signals processed by the spectrograph and then displays the processed Raman light signals on the upper computer; during image acquisition, a high-resolution digital camera in an imaging unit acquires seawater micro-plastic image information after passing through an objective lens and a beam splitter, and the acquired image information is transmitted to an upper computer to be displayed. Direct measurement of seawater micro-plastics can be realized, the detection speed is high, tedious steps are avoided, chemical reagents are not needed, and secondary pollution to seawater quality is avoided. And meanwhile, an imaging unit is added, so that the morphology of seawater plastic can be represented.

The invention discloses an onboard device for real-time water quality monitoring. The device comprises a device main body, wherein a waterproof tank and a hovercraft are arranged on the device body, a test box is arranged in the middle inside the waterproof tank, a spring door is arranged at the bottom of the test box, a switch pipe is arranged at the top of the test box and electrically connected with a controller, and the controller is electrically connected with an onboard power supply through a converter; a color sensor and a wireless transmitter are mounted on the left side wall inside the waterproof tank, the color sensor is electrically connected with the controller, and an input end of the wireless transmitter is electrically connected with the controller. In the actual test process, the onboard device shows good performance, is stable and reliable in structure, can completely realize real-time detection of seawater quality onboard, has functions of identifying the color of test paper, increasing the test frequency and performing monitoring remotely, and is suitable for popularization and application.

The invention discloses an automatic seawater quality monitoring and water sample distribution system. The overall framework of the system is divided into three levels which are an embedded control level, a bottom control level and a pipeline level; the pipeline level is the main step; an automatic water sampling system adopts a vertical multistage centrifugal pump to obtain water; the original sample water is divided into four parallel paths after entering a raw water pool; the first path enters a multi-parameter analyzer flow channel through a solenoid valve 1; the second path enters a totalnitrogen total phosphorus flow channel through a solenoid valve 2; and the third path enters nutritive salt analysis through a solenoid valve 3, and multistage filtration can be performed before thethird path enters the nutritive salt analysis; the first three paths can be finally discharged through a total path after passing through pressure-regulating valves of respective branches; and the redundant raw water in the raw water pool can be discharged through a pressure-regulating valve 3.

The invention discloses a seawater quality sampling device with different depths for ocean monitoring, which comprises a base, mounting ears are installed on the bottom of the four sides of the base, a rotating seat is connected to the top of the base, and one end of the rotating seat is It is connected with a mounting plate, the structure of the present invention is scientific and reasonable, and it is safe and convenient to use. When the sampling hopper is lowered, all solenoid valves are controlled by the control switch to open, and the seawater will pass through the seawater sampling chamber, and the seawater at the sampling position can be sampled. When the sampling hopper is lowered, the corresponding solenoid valve is controlled by the control switch to close, and samples are taken at different depths. By opening the storage cover, the rotating handle is taken out, and one end of the rotating handle is installed on the hexagonal rotating block. Shaking and turning the handle can drive the hexagonal rotating block and the rotating shaft to rotate, and can drive the cable storage roller to rotate. When the drive motor fails, the cable storage roller can be manually driven to rotate to pull the sampling bucket out of the sea.

The invention discloses a sea water quality detector, comprising a carrier plate, a fixture, a mobile power supply, a support plate, a sampling water tank, a pumping hose, a submersible pump and a water heavy metal detector; the fixture includes a first clamp plate, a second clamp plate and a driving mechanism; the driving mechanism includes a push plate, a rotary shaft, a first shaft seat, a second shaft seat and four sliding shafts. The sea water quality detector with the fixture of special structure may be fixed to the edge of a vessel and can detect water quality of sea water below; the sea water quality detector can detect water heavy metals in sampled water and can display water heavy metal detection data on a display screen.

The invention provides a water collecting device for sea farming. The water collecting device for sea farming comprises a branched water pipe, a tee pipe, a main water pipe, protecting nets and water permeable holes. The main water pipe is communicated with a main pipe of the tee pipe, a left pipe of the tee pipe and a right pipe of the tee pipe are connected with the branched water pipe, the protecting nets are arranged outside the branched water pipe, and the branched water pipe is provided with the water permeable holes. The water collecting device for sea farming has the advantages that the quality of collected seawater is stable, the influence of external factors is small, the manufacturing cost is low, the structure is simple, operation is convenient, cultivation seawater quality can be guaranteed, and cultivation production can be better conducted smoothly.