76 results about "Chlorine production" patented technology

The invention belongs to the crossing field of artificial intelligence and process control, particularly relates to an intelligent coupling control strategy for chlorine production through seawater electrolysis based on digital twinning, and aims to solve the problems of response lag, weak disturbance suppression and lack of electrode aging early warning in a traditional control method. According to the strategy, a high-fidelity digital twin fusing electrochemistry, fluid and thermodynamics is constructed, characteristics of current, temperature, impedance spectroscopy and the like are collected and fused at high frequency through a multi-source sensor, a state space model driven by a deep recurrent neural network is established, and current efficiency and electrode aging coupling evolution recognition is achieved; when salinization or flow mutation is detected, the twinborn body predicts and dynamically calibrates the current density and the voltage set value in advance, and the safety process window is synchronously scaled. According to the strategy, the chlorine gas yield fluctuation is reduced by 60%, the energy consumption standard deviation is reduced by 45%, the fault early warning is advanced by 2-5 hours, the fault-free operation time of the system is prolonged by 50%, and high-precision, self-adaptive and preventive intelligent control of the electrolysis process is realized.

The invention relates to the technical field of air electrode preparation, in particular to a metal-loaded super-hydrophobic air electrode, a preparation method and chlorine production application, the air electrode comprises a high-hydrophobicity gas diffusion layer obtained through polytetrafluoroethylene modification, and the metal-loaded super-hydrophobic air electrode is prepared through a corona etching and electrochemical in-situ deposition technology. A uniform and highly-dispersed metal catalyst layer directly grows on the surface of the polytetrafluoroethylene substrate, so that the gas diffusion electrode with excellent mass transfer performance and an efficient catalytic function is obtained; the prepared electrode is used for carrying out electrochemical catalysis on a water body containing chloride ions by adopting a cyclic voltammetry method, and active chlorine can be efficiently generated in situ; the prepared metal-loaded super-hydrophobic air electrode has the advantages of being low in oxygen mass transfer resistance, high in catalyst utilization rate, free of generation of by-products, capable of efficiently generating active chlorine and the like, and has wide application potential in actual water environment disinfection.

The invention discloses a metal film electro-catalysis chlorine evolution electrode with Ir monatomic inlaid in Pt crystal lattices and a synthesis method and application thereof. Through embedding of Ir single atoms, ortho-position Pt atoms approach Ir atoms, lattice shrinkage is caused, finally, Pt atom array sorting is disordered, more Pt atoms are exposed on the edge through embedding of the Ir single atoms, magnetism is obviously improved, and therefore the obtained metal thin film with the Ir single atoms embedded in the Pt lattice has high CER selection driving performance, and the metal thin film with the Ir single atoms embedded in the Pt lattice can be applied to the field of solar cell devices. And the catalyst has excellent electro-catalytic chlorine evolution activity and electro-catalytic hydrogen evolution activity. When applied to the field of electro-catalysis, especially as an electro-catalysis chlorine evolution electrode, the electrode can significantly improve the chlorine evolution efficiency of an anode electrode, reduce oxygen evolution reaction and prolong the service life of the electrode.

The utility model relates to an electronic-grade chlorine gas production device which comprises a vaporizer used for vaporizing and heating raw material liquid chlorine to obtain high-pressure chlorine gas; the pre-purifier is connected with the vaporizer and is used for pre-purifying the vaporized high-pressure chlorine; the first-stage heavy component removal system is connected with the pre-purifier and is used for removing heavy components from the purified high-pressure chlorine; and the second-stage light component removal system is connected with the first-stage heavy component removal system and is used for removing light components from the high-pressure chlorine subjected to heavy component removal treatment to obtain rectified liquid chlorine. The device integrates raw material vaporization, adsorption separation and rectification separation, continuous production can be achieved, and the produced electronic-grade chlorine meets the energy-saving and environment-friendly standard.

The invention discloses a hydraulic drive type rotating cathode electrochemical seawater chlorine production device and an application method thereof.The device comprises a shell, a hydraulic impeller and an electrode set, the shell is provided with a water inlet, a water outlet and a sewage draining exit, a rotating shaft conductive connecting rod is installed in the center of the shell, and the hydraulic impeller and a disc cathode are fixed to the rotating shaft conductive connecting rod; the fixed anodes are distributed on the two sides of the rotary disc cathode at intervals, the end angles of the fixed anodes penetrate through the shell through fixed conductive connecting rods and are connected with the positive electrode and the negative electrode of an external direct-current electrolysis power source, a water inlet of the shell right faces the hydraulic impeller, and the hydraulic impeller is driven by water inlet kinetic energy to drive the coaxial disc cathode to rotate. And the disc cathode and the fixed scraper form relative motion so as to remove a surface scale layer. The water power impeller can be driven to rotate through water inlet kinetic energy to achieve removal of cathode surface scale, the efficiency and operation stability of an electrolysis system are improved, and the electrode surface scale can be removed in time without additionally arranging a rotating motor.

The invention discloses a production device and a production method of electronic-grade chlorine, and the production device comprises a raw material storage tank, a gasification device, a dehydration tower, a light component removal tower, a heavy component removal tower, a compressor and a product collection bottle which are connected in sequence; the production method specifically comprises the following steps: (1) gasifying liquid chlorine; (2) removing moisture; (3) removing light component impurities; and (4) removing heavy component impurities, compressing and storing. The gasification device, the dehydration tower, the light component removal tower and the heavy component removal tower are adopted for separation and purification, metal ions, nitrogen trichloride and other chlorides in chlorine are further removed on the basis of removing water, oxygen, nitrogen and other impurities, explosion caused by long-term mixing of nitrogen trichloride and chlorine is avoided, meanwhile, the product purity is greatly improved, and the production cost is reduced. The method has the characteristics of simple process, low production cost, high product purity and the like, is easy to realize industrial production, can effectively reduce the production cost of enterprises, and greatly improves the economic benefits of the enterprises.

The invention provides a Cu-based catalyst for preparing chlorine through catalytic oxidation of hydrogen chloride and a preparation method and application of the Cu-based catalyst, the catalyst takes aluminum oxide as a carrier, the catalyst contains 2-10 wt% of Cu, 0.0001-0.5 wt% of S and 0.0001-0.5 wt% of P, the Cu content of the unit specific surface area of the catalyst is 1-50 * 10 <-4 > g / m < 2 >, and the conductivity of the catalyst dispersed in water with the same mass is 1-100 mS / cm. Although the Cu loss sign exists in the use process of the catalyst, the Cu content of the unit specific surface area of the catalyst does not decrease along with the extension of the reaction time, so that the activity is maintained. The catalyst provided by the invention overcomes the phenomenon of activity decline caused by Cu loss in the long-time use process, can realize industrial long-period stable operation, and has very high application value.

The present invention discloses a baffled sodium hypochlorite generator electrolytic cell. An upper anode, an upper rubber gasket, a cathode, a lower rubber gasket, and a lower anode are sequentially installed from top to bottom in an insulating electrolytic cell composed of upper and lower tank bodies; the anode is fixed to the inner groove of the upper and lower tank bodies by a nylon screw, and the cathode is fixed by pressing the upper and lower tank bodies, and the positive and negative electrodes are connected to a DC power supply; the adjacent electrodes and the rubber gasket form an electrolysis reaction chamber, and together with the electrolyte in the chamber, form an electrolysis unit, and a narrow slit is provided on the right side of the cathode to connect the front and rear electrolysis units to form a baffle. The present invention has a narrow electrode spacing, less heat release during the electrolysis process, and can effectively control the temperature of the electrolytic cell without adding a heat exchanger to avoid high-temperature decomposition of the sodium hypochlorite product; the process is long, and through the baffled structure, the salt water can be fully electrolyzed, reducing salt consumption, effectively improving the chlorine production efficiency, and reducing the volume of the electrolytic cell. The present invention is suitable for the disinfection link of rural drinking water projects.

Provided is an anode for chlorine-producing electrolysis, which has a low chlorine-producing overvoltage and excellent chlorine-producing efficiency even without using iridium (Ir). An anode (10) for chlorine-generating electrolysis is provided with: a base material (2) comprising titanium or a titanium alloy; and a catalyst layer (5) having a first layer (5a) disposed on the base material (2) and a second layer (5b) disposed on the first layer (5a), the first layer (5a) containing oxides of ruthenium (Ru), tin (Sn), and zirconium (Zr), and the second layer (5b) containing oxides of ruthenium (Ru) and titanium (Ti).

The present invention relates to a Ni / Ir / IrO2 porous carbon catalyst material, its preparation method, and its application. The porous carbon, obtained by oxidizing the precursor Ni-MOF-74, serves as a carrier, with Ir as the active center strongly adsorbed on its surface, and is used as a highly efficient alkaline catalyst. Compared with existing technologies, this invention offers significant physical and chemical advantages, including excellent electrocatalytic activity and stability in the chlorine evolution reaction, a key method for industrial chlorine production.

This invention provides a method for preparing a platinum-ruthenium catalyst for chlorine production, comprising: mixing nitrosylruthenium nitrate, platinum nitrate solution, deionized water, and a dispersant; heating to reflux temperature to dissolve; continuing the reaction at reflux temperature for 1 hour after the system changes from brownish-red to brownish-black; filtering the system after cooling to room temperature; and mixing the platinum-ruthenium mixture, silica hydrosol, and silica powder. The mixture is extruded into cylindrical pieces with a diameter of 5 mm, dried at 100-120°C for 6 hours to a breakage length of approximately 3-5 mm, and calcined in air at 200-240°C for 12 hours to obtain the platinum-ruthenium catalyst. This method can prepare a platinum-ruthenium catalyst with low chlorine impurity content that easily leads to catalyst aging. Simultaneously, because the reaction system remains acidic, the occurrence of ruthenium hydrolysis side reactions is reduced, resulting in a platinum-ruthenium catalyst with high yield, high ruthenium dispersion, and high catalyst activity.

The invention discloses a zero-discharge device and process for double-layer liquid sealing, redundant chlorine capturing, siphon pure discharge and closed-loop electrolysis of metal sodium, and belongs to the technical field of metal sodium preparation. The device comprises a furnace body, an oxygen-isolating anti-explosion inert liquid seal layer, a chlorine capture liquid seal layer, a liquid metal sodium layer, a molten sodium chloride electrolysis layer, a siphon type pure sodium discharge structure and an automatic feeding control system, the double-layer liquid seal is adopted to realize oxygen isolation, explosion prevention and chlorine in-situ absorption, the chlorine absorption capacity is designed to be more than two times of the maximum chlorine yield, and no leakage is ensured; liquid sodium is driven by lifting the liquid level during feeding to trigger siphon discharge, only pure metal sodium is produced, entrainment is avoided, and the purity is high; reaction byproducts are converted into raw materials to be recycled, no waste gas, no waste residues and no waste liquid exist in the whole process, and the byproduct water vapor can be condensed into purified water to be utilized. The device is simple in structure, intrinsically safe, high in automation degree, environmentally friendly and suitable for continuous production of high-purity metal sodium.

The utility model discloses a seawater chlorine production system and a sediment waste liquid recycling device thereof. The sediment waste liquid recycling device comprises a sediment tank, a clear liquid tank, a clear liquid conveying unit and a clear liquid conveying pipe, the sediment pool is connected with the bottom of a sodium hypochlorite storage device in the seawater chlorine production system, and the sediment pool is used for containing sediment output by the sodium hypochlorite storage device; the clarified liquor tank is used for accommodating the clarified liquor output from the sediment tank; the clarified liquid conveying unit is communicated with a first end of the clarified liquid conveying pipe, and the clarified liquid conveying unit is used for conveying the clarified liquid in the clarified liquid tank into the clarified liquid conveying pipe; and the second end of the clear liquid conveying pipe is communicated with the sodium hypochlorite storage device. The utility model provides a seawater chlorine production system and a sediment waste liquid recycling device thereof, which can solve the problem that sediment blocks a sodium hypochlorite storage device and can also realize the effect of recycling clear liquid.

The utility model relates to the technical field of electrolysis systems, in particular to a high-efficiency salt dissolving box for a chlorine production system, which comprises a high-efficiency salt dissolving box, an overflow port is arranged on one side of the high-efficiency salt dissolving box, an emptying port is arranged below the overflow port, a water inlet is arranged on the other side of the high-efficiency salt dissolving box, and a water outlet is arranged below the emptying port. A salt dissolving device is arranged in the efficient salt dissolving box, a liquid outlet is formed in the front end of the efficient salt dissolving box, an exhaust port and a salt adding port are formed in the top of the efficient salt dissolving box, and the salt dissolving device comprises a salt dissolving plate and a salt dissolving funnel. The device is simple in structure and low in use cost, solid salt can be efficiently dissolved, a dilute saline solution with proper concentration is provided for an electrolysis system, and a large amount of manpower and material resources are saved.

The invention provides a desulfurization wastewater comprehensive treatment system and method based on electrical method cooperative treatment, and relates to the technical field of desulfurization wastewater treatment.The desulfurization wastewater comprehensive treatment system comprises a pretreatment unit and a multi-stage electric treatment unit, a water inlet of the pretreatment unit is suitable for being connected with a desulfurization wastewater source, and the pretreatment unit can conduct alkalization treatment on desulfurization wastewater; the multi-stage electric treatment unit comprises an electric flocculation reactor, an electrochemical hardness removal device, an electric adsorption device and an electrolytic chlorine production device which are connected in sequence, the electric flocculation reactor, the electrochemical hardness removal device, the electric adsorption device and the electrolytic chlorine production device are all suitable for being electrically connected with an external power supply, and a water inlet of the electric flocculation reactor is connected with a water outlet of the pretreatment unit; the water outlet of the electrolytic chlorine production device is suitable for being connected with an external circulating water system to sterilize the water body. According to the device and the method, a multi-stage electrical method technology with synergism of electric flocculation suspended matter removal, electrochemical softening hardness removal, electro-adsorption desalination and electrolytic sterilization is integrated, and efficient purification of the desulfurization wastewater can be realized.

A trichloroisocyanuric acid mother liquor chlorine recovery system comprises a mother liquor tank and a hydrochloric acid tank, the mother liquor tank is communicated with the bottom of a dechlorination tank through a pump body and a pipeline, the hydrochloric acid tank is communicated with the top of a dechlorination tower through a pump body and a pipeline, and the bottom of the dechlorination tower is communicated with the top of the dechlorination tank. The dechlorination tank is also communicated with the top of the dechlorination tower through a pump body and a pipeline, and the top of the dechlorination tower is also communicated with chlorine recovery equipment. By optimizing the structure, the trichloroisocyanuric acid mother liquor chlorine gas recycling system is formed, the acidity of the mother liquor is increased, the air volume of the blow-off tower is reduced, the air content in the blown chlorine gas is reduced, the recycled chlorine gas is used for producing a sodium monochloroisocyanate intermediate, and the recycling is ensured.

The invention relates to a method for producing a catalytic anode for an electrolytic chlorine production system which produces chlorine gas from an aqueous solution by means of a chlorine evolution reaction. These anodes include an electrically conductive metallurgical layer substantially comprising ruthenium, tin, and titanium. The desired characteristics of such a metallurgical layer can be achieved by a production process employing specific control of reactants and process conditions.

The invention relates to the field of electronic-grade chlorine production, and particularly discloses an electronic-grade chlorine production and purification system and a production process thereof.The electronic-grade chlorine production and purification system comprises a raw material dehydration unit, a light component removal unit and a product refining unit, and the raw material dehydration unit comprises a first heat exchanger, a first condenser, a first reboiler and a first rectifying tower. Moisture and nitrogen trichloride in raw materials are removed through rectification operation of the first rectification tower, corrosion of wet chlorine to follow-up equipment is prevented, metal ion pollution is introduced, materials extracted from the tower top then enter the second rectification tower, and low-boiling-point impurities such as carbon dioxide are separated and removed through boiling point difference; liquid chlorine in the tower kettle of the second rectifying tower enters a third rectifying tower, high-boiling-point heavy components such as metal chlorides are further removed, a high-purity electronic-grade chlorine product is finally extracted from the tower top, heavy components discharged from the tower kettle of the third rectifying tower need to be regularly fed into waste liquid for treatment, and the whole process adopts a sequence of pre-dehydration, light component removal and heavy component removal; the work division is clear; and the equipment is effectively protected.

A chlorinator device for generating chlorine in a body of water includes a housing with an inlet and outlet end, a flowrate sensor mounted within the housing to measure water flowrate, and an electrolyte plate mounted within the housing to contact flowing water and convert salt into chlorine. The device can include an external controller for processing flowrate information, obtaining information from a cloud platform or other external sources, and controlling chlorine production. Methods for operating the chlorinator device, including adjusting chlorine production based on flowrate and external factors, are also disclosed.

The invention belongs to the technical field of fouling prevention and control, and particularly relates to a low-power-consumption electrolysis anti-fouling device for marine unmanned equipment and an application method of the low-power-consumption electrolysis anti-fouling device. The main body structure of the device comprises a copper composite electrode, a chlorine-producing anode arranged on the periphery of the copper composite electrode and a titanium cathode arranged in the center of the chlorine-producing anode; the application method comprises the following steps: determining the size of a fouling protection space and a maintenance and replacement period, calculating the size of the copper composite electrode and the boundary dimension of the device, arranging the positions of one or more sets of devices according to requirements, connecting the device with the marine unmanned equipment, and carrying out secondary pollution protection on the marine unmanned equipment. Copper ions generated through electrolysis serve as a main antifouling agent, chlorine prepared through seawater electrolysis serves as an auxiliary antifouling agent, the copper ions and hypochlorite are generated through intermittent electrolysis, marine organisms are prevented and treated, through electrode parameter matching, the electrolysis current is effectively reduced, the service life of a copper composite electrode is prolonged, electrolysis power consumption is reduced, and the stable antifouling effect with low power consumption is guaranteed.

The present application relates to the technical field of post-treatment of titanium sponge production, in particular to a dust removal method and system for reducing chlorine content, the system comprising a gas collecting hood, a lateral air inlet, a multi-stage flow guide baffle, a heat dissipation fin, a forced cooling unit, a temperature sensor, a control system, a dust collecting hopper and a dust discharge valve; the method realizes preliminary separation of coarse particles by forming a cyclone through tangential air inlet, and the three-stage collaborative cooling system composed of the multi-stage flow guide baffle, the heat dissipation fin and the forced cooling unit stably controls the temperature of chlorine at 60-70 DEG C, so as to promote the full condensation of gaseous chlorides, and then realize gas-solid separation through gravity settling, and the collected dust is directly returned to the electrolytic cell for recycling. The present application has high heat exchange efficiency, the dust recovery rate is not less than 90%, the dust content of purified chlorine is not higher than 10 mg / m3, the maintenance frequency of subsequent equipment is greatly reduced, and the present application has energy saving and environmental protection and high adaptability, and is suitable for various electrolytic chlorine production scenes.

The invention relates to a catalytic anode for an electrolytic chlorine production system. The electrolytic chlorine production system generates chlorine from an aqueous solution through a chlorine evolution reaction. These anodes include an electrically conductive metallurgical catalyst layer substantially comprising crystalline cobalt oxide particles in a matrix of defined stoichiometric tin and antimony. The desired characteristics of such a metallurgical layer can be achieved by a production process employing specific control of reactants and process conditions.

The utility model discloses a gas inlet device of a reaction kettle for chlorine production, which relates to the technical field of reaction kettles and comprises a reaction kettle body. The top end of the reaction kettle body is fixedly connected with a feeding pipe; the top end of the reaction kettle body is fixedly connected with a gas adding pipe; an exhaust pipe is fixedly connected to one side of the feeding pipe at the top end of the reaction kettle body; the bottom end of the gas filling pipe is fixedly connected with an annular pipe; the bottom end of the annular pipe is fixedly connected with a plurality of groups of diffusion pipes; materials are conveyed into the reaction kettle body through the feeding pipe, the bottom end of the annular pipe is connected with a plurality of groups of diffusion pipes, chlorine can be dispersed into the reaction kettle body through the diffusion pipes, chlorine in the diffusion pipes can be conveyed and diffused into the reaction kettle body through the diffusion gas heads, and through cooperation of the plurality of groups of diffusion pipes and the diffusion gas heads, chlorine can be diffused into the reaction kettle body. Chlorine can be conveyed to the upper and lower peripheral parts of the reaction kettle body, so that the mixing uniformity of the chlorine and materials can be improved, gas can be discharged through the exhaust pipe after the materials are mixed, and the materials can be discharged from the discharge pipe.

The invention relates to the technical field of air electrodes, in particular to a metal-loaded super-hydrophobic air electrode for chlorine production reaction and a preparation method thereof.The metal-loaded super-hydrophobic air electrode for chlorine production reaction comprises a porous composite matrix composed of a three-dimensional porous ceramic framework and an MXene nanosheet conductive network attached to pore channels and the surface of the three-dimensional porous ceramic framework; the gradient functionalized super-hydrophobic layer covers the surface of the porous composite matrix and is formed by compounding polytetrafluoroethylene and a fluorine-containing polymer formed by in-situ polymerization of a fluorine-containing acrylate monomer; the metal catalyst layer is directly loaded on the surface of the gradient functionalized super-hydrophobic layer. According to the application, an MXene two-dimensional conductive network is constructed in situ on a ceramic skeleton, a composite functional layer with gradient change of components and wettability is constructed, strong metal-carrier interaction is formed by using MXene and noble metal, and performance improvement is realized from multiple aspects of charge transfer, three-phase interface mass transfer, catalytic activity and selectivity, structural corrosion resistance and durability and the like.

The invention provides a regeneration method of a hydrogen chloride oxidation catalyst and a method for preparing chlorine through catalytic oxidation of hydrogen chloride, the hydrogen chloride oxidation catalyst comprises an active component containing ruthenium and a carrier for loading the active component, and the carrier contains titanium; the regeneration method comprises the following steps: carrying out first treatment on a hydrogen chloride oxidation catalyst to be regenerated by adopting a mixed atmosphere containing a halogen hydride gas and a gaseous hydroxyl donor; the gaseous hydroxyl donor comprises one or more of water, methanol and ethanol; and roasting the hydrogen chloride oxidation catalyst to be regenerated after the first treatment. One or more of water, methanol and ethanol are introduced into the atmosphere of the first treatment as a gaseous hydroxyl donor, and the existence of the gaseous hydroxyl donor enables the carrier of the hydrogen chloride oxidation catalyst to maintain a stable structure in the regeneration process and reduces Ti loss, so that the fundamental change of the performance of the catalyst after multiple times of regeneration can be effectively slowed down or even avoided, and the regeneration efficiency of the catalyst is improved. The chlorine production capacity of the catalyst is effectively improved and the chlorine production cost is reduced.

The present invention provides a salt chlorine generating device and a control method thereof, and belongs to the technical field of salt chlorine generators. The salt chlorine generating device comprises a salt chlorine generator structure and a connecting seat structure. The salt chlorine generator structure comprises a salt chlorine generator body, and connecting pipes are integrally formed at both ends of the salt chlorine generator body. The connecting seat structure comprises a support plate, a threaded rod, a rotating member and two connecting frames. A first groove and a second groove are provided at the bottom of the support plate, and a fixed frame is fixed at both ends of the support plate. The rotating member rotates through the second groove, and the rotating member and the threaded rod are connected by a transmission member. The two connecting frames are respectively fixed to the fixed frame and the bottom of the sliding plate. The salt chlorine generating device and the control method thereof disclosed in the present invention can effectively improve the chlorine production efficiency by utilizing the salt chlorine generator structure and the connecting seat structure.

The present application is suitable for chlorine production technical field, provide a kind of liquid chlorine gasification process, comprising the following steps: step one: liquid chlorine steel bottle in liquid chlorine bottle storehouse is connected into distillation column for distillation separation by liquid chlorine distribution platform;Step two: gaseous material from the top of distillation column enters condenser, and the liquid outlet of condenser is connected with chlorine gasifier by liquid chlorine pipeline;Step three: liquid chlorine enters the inner tube of chlorine gasifier, and is heated by 80-83 DEG C medium, and liquid chlorine is gasified by heat absorption;Step four: after drying and impurity removal, chlorine is sent to chlorine buffer tank by chlorine turbine compressor, and after the stable pressure of chlorine in chlorine buffer tank, it is sent to each chlorine point by chlorine pipe network.The distillation column and chlorine dryer can remove nitrogen trichloride, metal chloride and non-metallic chloride, thereby improving the purity of chlorine, and avoiding the influence on bromine extraction;The establishment of accident chlorine absorption device can handle leaked chlorine in time, and guarantee the safety of chlorine use.

The invention discloses a method for extracting high-value components from a waste copper-bismuth catalyst. The method comprises the following steps: S1, removing volatile components; s2, oxidizing roasting; s3, sulfuric acid leaching; s4, sulfuric acid leaching liquid treatment; s5, hydrochloric acid leaching; and S6, preparing bismuth oxychloride. According to the method for extracting the high-value components from the waste copper-bismuth catalyst, three elements, namely copper, bismuth and silicon, which account for main components in the waste copper-bismuth catalyst can be respectively extracted in a compound form for recycling by adopting a set of technological process, so that the resource utilization rate can be increased, and the consumption of auxiliary materials and energy sources adopted by the process is relatively low; the method is high in treatment capacity, various products can serve as chemical raw materials to be applied to various fields, accordingly, efficient recycling of resources is achieved, and the method can be further suitable for the industry of recycling high-value components of waste copper-bismuth catalysts at the present stage.

The invention provides an energy-saving and consumption-reducing sodium hypochlorite production device and a production method. The device comprises an electrolytic chlorine production unit and an alkali liquor preparation unit, the electrolytic chlorine production unit is connected with a chlorine gas washing tower, the chlorine gas washing tower is connected with a falling film absorber and a chlorine gas cooler, the chlorine gas cooler, a water mist catcher and a chlorine gas drying and liquefying unit are sequentially connected, and the chlorine gas drying and liquefying unit is connected with a sodium hypochlorite reaction unit; the alkali liquor preparation unit is connected with the alkali liquor head tank through the alkali liquor delivery pump, the alkali liquor head tank is connected with the falling film absorber, a liquid outlet of the falling film absorber is connected with the sodium hypochlorite reaction unit, and a liquid outlet of the sodium hypochlorite reaction unit is connected with the sodium hypochlorite storage tank through the sodium hypochlorite delivery pump. According to the device provided by the invention, alkali liquor and wet chlorine are firstly subjected to primary reaction in the falling film absorber and then are subjected to secondary reaction with dry chlorine in the sodium hypochlorite reaction unit, so that high-quality sodium hypochlorite is generated, and the device is high in automation degree, stable in production operation, simple to operate and relatively high in operation flexibility.

The invention provides a ballast water chlorination concentration monitoring method and system and a ship. The ballast water chlorination concentration monitoring method comprises the steps that the input power PX of an electrolytic tank, the voltage UX at the two ends of the electrolytic tank, the temperature difference delta T of ballast water at an inlet and an outlet of the electrolytic tank, the flow Q of the ballast water in the electrolytic tank and the flow QB of the ballast water in a ballast water main pipeline are obtained; according to the delta T and the Q, the heating power PT of the electrolytic tank to the ballast water is calculated; according to the PX and the PT, the effective chlorine production power P of the electrolytic cell is calculated; according to P and UX, the chlorine yield GD per hour of the electrolytic cell is calculated; and calculating the chlorine concentration TRO in the ballast water main pipeline according to the GD and the QB. According to the ballast water chlorination concentration monitoring method, the chlorination concentration in the ballast water main pipeline is calculated by utilizing the idea of energy conversion, the dependence on a residual chlorine analyzer is reduced or eliminated, the cost can be reduced, and the stability and reliability of system operation are improved.