1663 results about "Chemical agents" patented technology

The invention relates to the technical field of water treatment intelligent control, in particular to an AI-based intelligent urban water purification and sewage treatment process optimization system and method, and the method comprises the steps: obtaining related sensor data information, and monitoring and recording the change of key data in real time; establishing a water quality change prediction model by using a multiple linear regression model, wherein the water quality change prediction model predicts the water quality change according to the key data change acquired in real time; the dynamic agent AI model adjusts the dosage, and the water treatment chemical / biological reaction kinetics AI model predicts the pollutant degradation condition; a local lightweight AI model optimizer and a multi-target genetic algorithm are combined with energy consumption, medicament cost, processing efficiency and carbon emission to obtain an optimal control model; the optimal control model optimizes the operation parameters of the sewage treatment process according to the pollutant degradation condition. According to the method, the operation parameters of the sewage treatment process are optimized through the optimal control model, the energy consumption, the agent cost and the carbon emission are reduced, and the treatment efficiency is improved.

The invention relates to the technical field of sewage treatment, and discloses a supervision system and method for a sewage treatment process, and the system comprises a multi-parameter real-time monitoring module, a data fusion and analysis module, an automatic dosing control module and a feedback optimization module. The method is applied to the system. According to the supervision system and method for the sewage treatment process, dynamic and accurate supervision of the sewage treatment process is realized through the synergistic effect of the multi-parameter real-time monitoring module, the data fusion and analysis module, the automatic dosing control module and the closed-loop feedback optimization module; the problems of parameter simplification, control lag, high energy consumption and the like in the prior art are solved, the standard reaching rate of effluent is increased, and meanwhile, the agent cost and the equipment maintenance cost are reduced.

Provided herein are engineered nucleic acids (e.g., expression vectors, including viral vectors, such as lentiviral vectors, adenoviral vectors, AAV vectors, herpes viral vectors, and retroviral vectors) that encode OCT4; KLF4; SOX2; or any combination thereof that are useful, for example, in inducing cellular reprogramming, tissue repair, tissue regeneration, organ regeneration, reversing aging, or any combination thereof. Also provided herein are recombinant viruses (e.g., lentiviruses, alphaviruses, vaccinia viruses, adenoviruses, herpes viruses, retroviruses, or AAVs) comprising the engineered nucleic acids (e.g., engineered nucleic acids), engineered cells, compositions comprising the engineered nucleic acids, the recombinant viruses, engineered cells, engineered proteins, chemical agents that are capable of activating expression of OCT4; KLF4; SOX2; or any combination thereof, an engineered protein selected from the group consisting of OCT4; KLF4; SOX2; or any combination thereof, an antibody capable of activating expression of OCT4; KLF4; SOX2; or any combination thereof, and methods of treating a (e.g., ocular disease), preventing a disease (e.g., ocular disease), regulating (e.g., inducing or inducing and then stopping) cellular reprogramming, regulating tissue repair, regulating tissue regeneration, or any combination thereof).

The invention discloses a water environment pollution water treatment and purification device and a purification method thereof, and belongs to the technical field of water treatment, the water environment pollution water treatment and purification device comprises a water inlet tank, a treatment tank is fixedly connected to one side of the water inlet tank, a water outlet tank is fixedly connected to one side of the treatment tank, and water pumps are fixedly connected to the water inlet tank and the water outlet tank; the input end of the water pump is fixedly connected with a water pumping pipe. According to the conveying device, the first motor drives the transmission wheels to rotate, the transmission wheels drive the belt and the other transmission wheel to rotate synchronously, then the connecting shaft rotates, the connecting shaft drives the reciprocating lead screw to move in the fixing plate, the reciprocating lead screw pushes the threaded cap to move, the threaded cap drives the transverse plate to move synchronously, and then the conveying cylinder moves stably in the horizontal direction. Chemical agents can be evenly distributed in the treatment box, the chemical agents and sewage are fully mixed through continuous stirring of the stirring blades, the purification effect is achieved, and finally treated water is sucked into the water outlet box through the water pump and discharged through the water outlet valve.

The invention relates to the technical field of microorganisms, in particular to talaromyces purpurogenus, strain fermentation liquor of the talaromyces purpurogenus and application of the talaromyces purpurogenus to prevention and treatment of northern corn leaf blight. The invention provides biocontrol fungus fermentation liquor for preventing and treating northern corn leaf blight and application of the biocontrol fungus fermentation liquor. The preservation number of a strain of the biocontrol fungus fermentation liquor is CGMCC No.41911. The strain and the fermentation liquor thereof can completely inhibit various pathogenic bacteria, active substances in the fermentation liquor are relatively stable, the active validity period is long, the systemic property is relatively strong, the strain is not easy to degrade, high temperature resistance and microwave radiation resistance are realized, the antibacterial effect of chemical agents can be remarkably improved, and the effects of pesticide reduction and synergism are remarkably achieved when the strain and the fermentation liquor are mixed with chemical pesticides; therefore, the environmental safety problem and the drug resistance caused by chemical pesticides are obviously reduced.

The invention relates to the technical field of waste gas treatment, and discloses a method for treating odor, peculiar smell and organic waste gas through pretreatment enhanced absorption. The method comprises the following steps: acquiring waste gas component characteristic parameters through a sensor; calculating a pretreatment medicament formula by using a convolutional neural network; adding a medicament according to the instruction to remove easily-treated components and hardening and tempering difficultly-treated components; monitoring absorption liquid parameters to form characteristic indexes; adjusting gas-liquid distribution based on indexes to construct an optimal environment; introducing the quenched and tempered waste gas into the environment for enhanced absorption to obtain standard gas. Aiming at stink, peculiar smell and organic waste gas with complex and changeable components, through combination of intelligent pretreatment and enhanced absorption, components which are easy to treat and difficult to treat are efficiently and synergistically removed, meanwhile, the dosage of chemicals is reduced, the treatment stability is improved, and strict emission standard requirements are met.

A spray wand for use with a chemical or chemical formulation in solid form. The wand hose end has a wand hose end valve for control of water flow from a hose. A refill cartridge having a swirl chamber may be attached to the hollow tube. The refill cartridge has at least one nub, indent and / or external channel or groove on its external surface.

The invention provides a microorganism curing biochar material and a heavy metal sewage treatment method thereof. The microorganism curing biochar material comprises modified biochar, functional microorganisms, an intelligent responsive polymer coating and quantum dots. The high-performance material is prepared through acid treatment, loading of metal oxide modified biochar, compounding with specific functional microorganisms, coating of an intelligent responsive polymer coating and bonding of quantum dots, when heavy metal sewage is treated, all the components have a synergistic effect, the adsorption and conversion capacity is improved, the environmental adaptability is enhanced, real-time monitoring is achieved, and the application prospect is wide. The sewage treatment efficiency and quality are effectively improved; pretreatment is set in the sewage treatment process, and the addition proportion, the reaction temperature, the stirring rotating speed, the reaction time and the like of a microorganism solidified biochar material are reasonably controlled, so that the high removal rate of various heavy metal ions is realized; meanwhile, the microorganism solidified biochar material can be repeatedly used, so that the use of a large number of chemical agents is avoided, the secondary pollution is reduced, and remarkable economic and environmental benefits are brought.

The invention relates to the field of sewage treatment, in particular to a sewage treatment optimization method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring treatment parameters such as inlet water quality data, instantaneous flow, sewage types and outlet water quality requirements, matching corresponding treatment process constraint conditions according to the sewage types, and formulating differentiated treatment strategies according to characteristics of different types of sewage such as industrial wastewater, domestic wastewater and medical wastewater; the method comprises the following steps: determining sewage treatment data by combining instantaneous flow, effluent quality requirements and treatment process constraint conditions, calculating an aeration rate regulation value, sludge reflux and chemical agent dosage, realizing dynamic optimization of treatment parameters, generating a control instruction based on the optimized sewage treatment data, and issuing the control instruction to a sewage treatment system. The sewage treatment efficiency is effectively improved, and multi-target collaborative optimization sewage treatment is realized.

Cleaning systems and methods, wherein the system includes a chamber configured to receive a body part of a user or an object, where the user's skin or object is exposed to one or more cleaning, disinfecting and / or sterilizing processes, such as chemical agents, mechanical energy, ultraviolet light, and ultrasound, to clean, disinfect and / or sterilize the skin or object.

The invention relates to the field of wastewater treatment, and discloses an intelligent conditioning and purifying device for bio-fertilizer production wastewater, the intelligent conditioning and purifying device comprises a treatment tank body, the upper end of the treatment tank body is provided with a medicament adding port, the upper end of the inner side of the treatment tank body is provided with a pre-filtering plate, and the lower end of the inner side of the treatment tank body is provided with a top filtering plate; bottom filter plates are vertically and movably arranged below the top filter plates, and gaps between the top filter plates are used for being filled with activated carbon particles; a stirring part is arranged at the upper end of the pre-filtering plate. According to the intelligent conditioning and purifying device for the bio-fertilizer production wastewater, medicament adding treatment, pre-filtering treatment and activated carbon purification treatment are integrated on one device, and meanwhile, a gap between a top filter plate and a bottom filter plate can be increased during activated carbon particle adsorption treatment, and activated carbon particles can be dispersed; the use effect of the activated carbon particles is improved, and the activated carbon particles are blown by water treated at the bottom, so that circular wastewater treatment is realized, and the wastewater treatment effect is improved.

Provided herein are engineered nucleic acids (e.g., expression vectors, including viral vectors, such as lentiviral vectors, adenoviral vectors, AV vectors, herpes viral vectors, and retroviral vectors) that encode OCT4; KLF4; SOX2; or any combination thereof that are useful, for example, in inducing cellular reprogramming, tissue repair, tissue regeneration, organ regeneration, reversing aging, or any combination thereof. Also provided herein are recombinant viruses (e.g., lentiviruses, alphaviruses, vaccinia viruses, adenoviruses, herpes viruses, retroviruses, or AAVs) comprising the engineered nucleic acids (e.g., engineered nucleic acids), engineered cells, compositions comprising the engineered nucleic acids, the recombinant viruses, engineered cells, engineered proteins, chemical agents that are capable of activating expression of OCT4; KLF4; SOX2; or any combination thereof, an engineered protein selected from the group consisting of OCT4; KLF4; SOX2; or any combination thereof, an antibody capable of activating expression of OCT4; KLF4; SOX2; or any combination thereof, and methods of treating a (e.g., ocular disease), preventing a disease (e.g., ocular disease), regulating (e.g., inducing or inducing and then stopping) cellular reprogramming, regulating tissue repair, regulating tissue regeneration, or any combination thereof).

The invention provides a garlic planting full-process database service system based on agricultural big data, which relates to the technical field of agricultural planting and comprises a planting planning module, a seeding management module, a growth monitoring module, a topdressing irrigation management module, a pest control module and a harvesting decision module. The planting planning module accurately matches varieties and base fertilizer formulas according to soil and yield data; the seeding management and growth monitoring module dynamically optimizes planting measures in combination with real-time data and historical experience; the topdressing irrigation module, the pest control module and the harvesting decision-making module utilize technologies such as image recognition and spectrum detection to realize a precise and scientific management strategy, effectively improve the resource utilization rate, reduce the influence of environmental fluctuation on garlic growth, reduce the use of chemical agents, realize full-process data driving by integrating multi-source data, and improve the management efficiency. Meanwhile, a complete planting file is formed to support strategy iteration, large-scale and efficient development of garlic planting is facilitated, and then the economic benefits of garlic planting are effectively improved.

The invention discloses a comprehensive prevention and control method for tobacco root knot nematode disease containing a biological agent. The method comprises the steps of crop rotation of tobacco and buckwheat / quinoa, host resistance induction of the microbial agent in the seedling raising period, tobacco planting soil quality improvement in the transplanting period and the like. The agronomic characters of tobacco seedlings are effectively improved, and the physical characters of soil are improved; the chemical properties of soil pH, alkali-hydrolyzable nitrogen, available phosphorus, quick-acting potassium, exchangeable calcium, exchangeable magnesium and the like are improved; the activity of soil urease, sucrase, acid phosphatase, catalase and peroxidase is improved; the content of water-soluble phenols, compound phenols and total phenols in soil is reduced; the disease index of the tobacco root knot nematode disease can be remarkably reduced, the survival rate of tobacco is increased, the application amount of chemical agents is reduced, and the healthy and sustainable development of the tobacco industry is promoted.

The invention discloses a gene RhNADP-LIKE for regulating and controlling Chinese rose flower aging, and particularly relates to the technical field of molecular biology and horticultural plant physiology. According to the invention, bottle insertion life phenotype data of 358 parts of core germplasm of tetraploid Chinese rose is screened through genome-wide association analysis (GWAS), and the gene RhNADP-LIKE significantly associated with senescence is identified. The gene accelerates the aging process of petals by regulating the accumulation of reactive oxygen species (ROS). After RhNADP-LIKE expression is inhibited by using a virus-induced gene silencing (VIGS) technology, the blooming period of rosa chinensis flowers is prolonged by about 2 days, and the ROS level is remarkably reduced. The invention provides a molecular target for prolonging the vase life of the Chinese rose, can be applied to gene editing breeding or development of an environment-friendly preservative, reduces the dependence of chemical agents, and improves the economic benefit and sustainable development potential of the cut flower industry.

The invention discloses a proportioning optimization method for efficiently balancing a chemical oil displacement system. The proportioning optimization method comprises the following steps: S1, collecting and sorting experiment and field data of the existing chemical oil displacement system; the oil displacement effect can be effectively improved by continuously optimizing the ratio of the chemical agents through experiments and numerical simulation, so that the recovery efficiency of an oil field is improved, the oil-water interface characteristics can be improved, the fluid viscosity can be reduced, the oil fluidity can be improved through the reasonable ratio of the chemical agents, and by analyzing the cost benefits of different ratios, the oil displacement effect can be effectively improved. The chemical agent combination with higher economical efficiency can be selected, the expenditure in the chemical oil displacement process is reduced, the oil displacement effect and cost are comprehensively considered, the resource utilization efficiency of the chemical oil displacement system is improved by optimizing the proportion, and it can be ensured that the selected proportion is not only theoretically effective but also theoretically effective through laboratory verification and on-site small-scale tests. And the method also has practical significance in practical application.

Provided herein are engineered nucleic acids (e.g., expression vectors, including viral vectors, such as lentiviral vectors, adenoviral vectors, AAV vectors, herpes viral vectors, and retroviral vectors) that encode OCT4; KLF4; SOX2; or any combination thereof that are useful, for example, in inducing cellular reprogramming, tissue repair, tissue regeneration, organ regeneration, reversing aging, or any combination thereof. Also provided herein are recombinant viruses (e.g., lentiviruses, alphaviruses, vaccinia viruses, adenoviruses, herpes viruses, retroviruses, or AAVs) comprising the engineered nucleic acids (e.g., engineered nucleic acids), engineered cells, compositions comprising the engineered nucleic acids, the recombinant viruses, engineered cells, engineered proteins, chemical agents that are capable of activating expression of OCT4; KLF4; SOX2; or any combination thereof, an engineered protein selected from the group consisting of OCT4; KLF4; SOX2; or any combination thereof, an antibody capable of activating expression of OCT4; KLF4; SOX2; or any combination thereof, and methods of treating a (e.g., ocular disease), preventing a disease (e.g., ocular disease), regulating (e.g., inducing or inducing and then stopping) cellular reprogramming, regulating tissue repair, regulating tissue regeneration, or any combination thereof).

The invention provides an intelligent maintenance cleaning device for nanofiltration membrane pollution control and a method thereof, and solves the problems of low maintenance cleaning efficiency, poor adaptability of cleaning parameters and pollution conditions and frequent chemical cleaning of an existing nanofiltration system. Belongs to the technical field of membrane pollution control. According to the invention, the filtering system, the cleaning system and the intelligent decision-making module are integrally designed, so that the closed-loop control of the whole process of real-time monitoring, pollution identification, intelligent decision-making and automatic cleaning of the running state of the nanofiltration membrane is realized. The cleaning effect gating memory neural network model is used as a membrane pollution prediction model, membrane pollution can be accurately predicted, and key cleaning nodes can be identified. The optimal membrane cleaning parameters are generated by adopting a non-dominated sorting genetic algorithm, the usage amount of chemical agents and the cleaning cost are reduced, and the membrane pollution control effect is improved. The invention is applicable to the field of drinking water treatment.

The utility model discloses a thermal hydrolysis cyanide breaking device, which relates to the technical field of wastewater treatment and comprises a cyanide breaking reactor, a wastewater heat exchanger, a pipeline mixer, a steam mixer, an instrument control valve and the like. After being heated by the wastewater heat exchanger, the wastewater enters a cyanide breaking reactor, and steam enters a steam mixer to heat the wastewater to a specified temperature and then enters the cyanide breaking reactor. The characteristic that the cyanide aqueous solution is easy to hydrolyze is utilized, so that the cyanide aqueous solution is hydrolyzed at the temperature of higher than 140 DEG C to produce sodium formate and ammonia, the toxicity of cyanide is eliminated, high-temperature wastewater discharged from the cyanide breaking reactor enters the wastewater heat exchanger to exchange heat with wastewater to be treated, and heat is recovered; the pressure of the reactor is controlled through a wastewater heat exchanger outlet wastewater outlet pipeline pressure regulating valve. The cyanide wastewater treatment device is reasonable in design, only a small amount of sodium hydroxide is needed for adjusting the pH of wastewater, no chemical agent needs to be added in other procedures, the cyanide wastewater treatment efficiency is improved, and the cost is saved.

The invention belongs to the technical field of pesticides, and particularly relates to a pesticide composition containing trifluorocide, which comprises a component A and a component B. The component A is thymol; and the component B is trifluorocide. The compound nematicidal composition can significantly improve nematicidal activity, can be processed into missible oil, granules, an emulsion in water, an aqueous solution and other common dosage forms applied in the agricultural field, is used for preventing and treating nematode diseases of vegetable crops, grain crops and fruit trees, has the advantages of low dosage and prominent effect, can delay the problem of drug resistance of existing chemical agents, and can be used for preventing and treating the nematode diseases of the vegetable crops, the grain crops and the fruit trees. The safety requirements of pesticide preparations are met.

The invention relates to the technical field of agricultural planting, in particular to a method for preventing and treating watermelon fusarium wilt by using a green bactericide, which comprises the following steps: preparing the green bactericide which comprises the following components in percentage by mass: 18-25% of composite plant source active component consisting of water lettuce extract, enteromorpha polysaccharide and field horsetail flavone; 20%-30% of an antagonistic bacterium compound preparation, wherein the antagonistic bacterium compound preparation comprises bacillus pumilus and trichoderma; 38%-45% of a nano-carrier, wherein a chitosan-sodium alginate compound is used as an embedding material; and the balance of auxiliary components. Applying the green bactericide to watermelon plants; through component optimization and a synergistic effect, compared with the prior art, the composition has the remarkable advantages that the safety is high, all the components are from natural plants or microorganisms, no chemical pesticide residue exists, the composition is healthy to human bodies and environmentally friendly, and the problems of drug resistance and soil pollution caused by chemical agents can be avoided.

The invention relates to the technical field of water treatment, provides a chemical adding control scheme, and particularly relates to a chemical adding control method and system for a chemical for water treatment. Water quality data about to-be-treated water is obtained by predicting the water quality of inlet water, the water quality data is used as key parameters to obtain a corresponding agent feeding predicted amount, and a feedback control weight and a feedforward control weight are determined based on the predicted amount and changes of water body target data and water quality conditions in the agent feeding process; and combining the feedback control weight and the feed-forward control weight to obtain the dosing control quantity. According to the control method provided by the embodiment of the invention, the control quantity can be accurately determined based on the condition of the water quality and the overall environment change of the water treatment system, compared with a single control logic in the prior art, the accuracy of overall control is improved, and the problems of a complicated water treatment system and inaccurate environment control can be solved.

According to the method for effectively removing the spartina alterniflora, deep digging and layered inverted burying are conducted on the spartina alterniflora in a treatment area, it is ensured that overground parts and shallow surface plants are all integrally inverted and buried in soil which is 140 cm or below away from the ground, the plants are isolated from light and air, and the effect of removing the spartina alterniflora is achieved. Then the underground part is integrally inversely buried above the inversely buried overground part, the overground part is thoroughly covered, deep isolation is ensured, the regeneration capacity of the overground part is fundamentally blocked, and thorough deep digging and layered inversely buried burying of the spartina alterniflora in the whole treatment area are sequentially and progressively completed. The method does not need to use chemical agents, is environmentally friendly, easy and convenient to operate, high in durability and suitable for ecological management of large-area beach wetlands, effectively restrains rejuvenation of spartina alterniflora and maintains ecological balance.

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment system with high agent mixing efficiency. The sewage treatment system with high chemical mixing efficiency provided by the invention solves the technical problem of non-uniform dispersion of chemicals in sewage in sewage treatment equipment in the prior art. The sewage treatment system with the high chemical mixing efficiency comprises a liquid supply assembly, by arranging the guide plate, and arranging the guide surface and the through hole on the guide plate, when liquid in the liquid supply channel passes through the guide plate, part of the liquid is guided by the guide surface and moves in the direction away from the bottom wall of the liquid supply channel in all directions, and the other part of the liquid flows through the guide plate through the through hole; the liquid guided by the guide face and the liquid flowing through the guide plate through the through hole converge on the rear side of the guide plate, and part of the liquid impacts the liquid flowing through the guide plate through the through hole when moving towards the bottom wall of the liquid supply channel again through the guide face, so that the liquid can be mixed in the liquid supply channel.

The utility model relates to the technical field of sewage treatment, and discloses a dosing sewage treatment device for sewage treatment, which comprises a dosing box, a storage box is arranged at the bottom of the dosing box, a liquid outlet is arranged at the bottom of the dosing box, and through the design of a liquid outlet component, after a medicament in the dosing box is mixed with water, one electric push rod is opened, and the medicament in the dosing box is discharged. When mixed liquid enters one cavity, the electric push rod is started to drive the liquid outlet assembly to move upwards to block the liquid outlet again, so that the liquid outlet assembly is separated from the bottom of the dosing box in a staggered mode, and at the moment, the liquid medicine can be discharged into the liquid storage cavity below through the liquid guide groove to be stored, and after the mixed liquid enters one cavity, the electric push rod is started to drive the liquid outlet assembly to move upwards to block the liquid outlet again. At the moment, clean water can be injected into the dosing box to clean the dosing box, medicament residues are prevented, liquid used for cleaning the dosing box is guided into the lower cavity after the other liquid outlet assembly is started and is discharged through the liquid outlet pipe, and compared with a traditional stirring cavity, the structure can effectively improve the working efficiency.

The utility model discloses a dense sludge regeneration system and relates to the technical field of sludge treatment. Comprising a sewage inlet, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, a water outlet, a sludge densification regeneration device, a sludge concentration tank, a sludge dewatering room and a sludge pump room, the anaerobic tank, the anoxic tank and the aerobic tank are sequentially connected, the anaerobic tank is connected with the sewage inlet through a pretreatment device, and the aerobic tank is connected with an air blower room and the secondary sedimentation tank. The secondary sedimentation tank is connected with a water outlet and a sludge pump room, returned sludge of the sludge pump room is conveyed to the anaerobic tank, the sludge dense regeneration device is respectively connected with the sludge pump room, the anaerobic tank and the sludge concentration tank, and the sludge pump room is also connected with the sludge dewatering room through the sludge concentration tank. The device is reasonable in structural design, good in use effect, high in investment return, easy to integrate and high in practicability, can perform biological phosphorus removal and improve the settling ratio of activated sludge, and reduces the addition of chemical agents.

The embodiment of the invention provides a dust suppression robot and a control method thereof, and relates to the field of dust suppression. The medicament box is fixed on the movable chassis and is used for accommodating a dust suppressant; the operation pipeline is fixed to the movable chassis and communicates with the agent box, and the operation pipeline is provided with a spraying opening used for spraying the dust suppressant; the agent pump is arranged on the operation pipeline and used for driving the dust suppressant to be sprayed out from the spraying opening; wherein the spraying opening comprises a sedimentation spraying opening which is arranged on the side of the operation pipeline and is used for spraying the dust suppressant into the air; the film forming nozzle is arranged at the end, facing the ground, of the operation pipeline and used for spraying a dust suppressant to the ground. The dust suppression robot can be applied to strong wind scenes and has good dust suppression capacity.

The utility model relates to the technical field of biological treatment, and discloses a parasitic wasp killing device which comprises a semicircular protective cover with a downward opening and a bee-keeping cylinder arranged at the top of the protective cover, the top end of the bee-keeping cylinder is blocked through a feeder, a flap valve is arranged at the bottom end of the bee-keeping cylinder and used for controlling communication between the interior of the bee-keeping cylinder and the interior of the protective cover, and the protective cover is arranged on the top of the bee-keeping cylinder. A control device used for controlling the flap valve and a power source connected with the control device are further arranged on the top of the protective cover. According to the parasitic wasp eradication device, parasitic wasps are bred through the wasp-keeping cylinder, after the ant nest is covered with the protective cover, the parasitic wasps are released to parasitically eradicate ants, compared with a traditional trapping and killing agent, the parasitic wasp eradication device does not pollute the environment, and due to the fact that a natural biological prevention and control mode is utilized, damage of chemical agents to an ecological system is avoided. The parasitic wasps have the characteristics of self-reproduction and reutilization, and once the parasitic wasps complete the ant killing task, the parasitic wasps can be recycled into the bee-keeping cylinder, so that the sustainable utilization of the equipment is realized.

A forward and reverse bidirectional flow rate metering method for an underwater chemical agent injection device. The underwater chemical agent injection device comprises a device body, wherein the device body comprises an agent input joint (1), a pressure reduction member (2), a needle valve assembly (5) and an agent output joint (3), which are sequentially in communication by means of a flow channel. The method comprises: first, respectively performing forward calibration and reverse calibration by means of an agent at different opening degrees and different flow rates, during which a differential pressure is synchronously acquired before and after the agent flows through a needle valve assembly (5); then, fitting relationships between flow rates and differential pressures under different opening degrees of the needle valve assembly (5), so as to obtain several opening degree-flow coefficient arrays; and then fitting relationships between flow coefficients and the opening degrees, and establishing equations for the flow rate, opening degree and differential pressure.

The invention relates to the field of coal mining subsidence control, in particular to a floor rock stratum chemical modification expansion subsidence reduction control method. Comprising the steps of determining the range of a floor failure zone below a coal seam, and selecting a rock stratum with a certain thickness below the floor failure zone as an isolation protection zone; the lower part of the isolation protection belt is a chemical modified expansion belt; selecting a chemical agent for expansion according to mineral components of the chemically modified expansion zone rock stratum; directional drilling is conducted in a working face roadway, a directional drilling horizontal section is constructed in a chemical modified expansion zone, and directional drilling is conducted in the advancing direction of a working face towards the open-off cut direction; the expansion band is chemically modified through directional drilling fracturing; and after the working face is pushed over the horizontal section of the directional drilling hole and before the working face reaches the hole opening of the directional drilling hole, a chemical agent is injected into the chemical modified expansion zone through the directional grouting drilling hole. According to the method, the base plate rock stratum is chemically modified to generate an expansion effect, so that the base plate rock stratum is lifted to support the goaf, the subsidence of the overlying rock stratum is reduced, and the surface subsidence is controlled.