86results about How to "Meet the requirements of environmental regulations" patented technology

The invention relates to the technical field of oil field development, and in particular relates to a profile modifying / water plugging agent for oil well water plugging and profile modification. The water plugging agent is prepared from the following components in mass percent: 1-15% of polysaccharide, optimally 2-10% of the polysaccharide; 0.5-10% of a suspension stabilizer, optimally 1-6% of the suspension stabilizer; 0.5-20% of a gel strength accelerating agent, optimally 2-10% of the gel strength accelerating agent; and the balance of preparation fluid. The invention also provides a method for preparing the water plugging agent and application thereof.

The invention discloses a circulating fluidized bedboiler combustion optimizing control method based on fuzzy adaptive inference, and belongs to the technical field of circulating fluidized bed combustion. A circulating fluidized bedboiler combustion optimizing control system comprises a data communication subsystem, a model prediction subsystem and a performance optimization subsystem, wherein the data communication subsystem is in data interaction with OPC server communication software of a DCS; the model prediction subsystem is connected with the data communication subsystem; the performance optimization subsystem is respectively connected with the model prediction subsystem and the data communication subsystem; a boiler efficiency and SO2 and NOx discharge model is established through fuzzy adaptive inference algorithms, the running working condition of a circulating fluidized bedboiler is optimized by selecting a fruit fly optimization algorithm with an optimum reserved strategy, optimal set values of operating variables are provided for a power station DCS basic control layer, and high-efficiency and low-pollutant discharge running of the circulating fluidized bedboiler is realized.

The invention discloses star-shaped hydroxyl polyester adopting polyhydric alcoho as a nucleus and a preparation method and an application of the star-shaped hydroxyl polyester. The preparation method comprises the following steps: enabling 1 to 8 molar caprolactone and 1 to 4 molar anhydride to react for 6 to 10 h at 80 to 140 DEG C by adopting 1 molar small molecular polylasic alcohol as a core molecule to obtain a matrix star-shaped polyester, then reacting with 1 to 4 molar monoglycidyl ether at 90 to 150 DEG C to obtain star-shaped hydroxyl polyester. The prepared star-shaped hydroxyl polyester has the advantages of simple synthesis process, high solid content and low viscosity, a hydroxyl value is 140 to 250 mg KOH / g (80 percent of solid content), the viscosity at 25 DEG C when the solid content is 80 percent is 300 to 3000cp, the star-shaped hydroxyl polyester can be cross-linked with a polyurethane curing agent containing an isocyanate group and can be used for preparing a coating with a high solid content, the VOC content at the construction viscosity is smaller than 380 g / L, and the film performance can satisfy the national standard of the solvent-type dual-component polyurethane wood coatings.

The invention relates to a water base non-chrome zinc-aluminium coating and methods for preparing and using the same. The coating is prepared by proportionally mixing a component A and a component B; the component A contains 50-150g / L of lamellar metal powder, 145-290ml / L of organic solvent, 10-200ml / L of deionized water, 10-36ml / L of reducing agent and 5-15ml / L of wetting agent; and the component B contains 60-240ml / L of deionized water, 20-75ml / L of binding agent, 8-22ml / L of thickening agent, 4-8ml / L of silicon compound and the balance of the organic solvent. The method for preparing the water base non-chrome zinc-aluminium coating comprises the steps of: weighing the lamellar metal powder proportionally to be mixed uniformly, and then adding the organic solvent to be mixed uniformly for later use; mixing the reducing agent with the wetting agent, adding an appropriate amount of the deionized water to be mixed uniformly, and then adding the lamellar metal powder liquid to prepare the component A; proportionally weighing the thickening agent, the binding agent and the silicon compound, and adding the organic solvent to be mixed uniformly to prepare the component B; and mixing the prepared component A and the prepared component B according to the ratio of 2:1, and stirring unit uniform, thus obtaining the coating. The method for using the water base non-chrome zinc-aluminium coating is that the coating is coated on a part to be treated, and the baking temperature is increased to 360 DEG C so as to solidify and crosslink the coating to form a dense protective layer. The coating has the corrosion resistance which reaches 840 hours of a neutral salt spray test and over 96 hours of a heat resistance test, the usage amount of harmful substances is greatly reduced, and the working environment is improved.

The invention discloses a method for preparing plant oil-based cyclic carbonate prepolymer through thiol-ene click reaction. Glycerol carbonate, thiol-containing organic acid and catalysts are mixed; dichloromethane is used as a solvent; reaction is carried out at 60 to 120 DEG C for 6 to 12h to obtain thiol-containing cyclic carbonates; next, vegetable oil, the thiol-containing cyclic carbonates and photoinitiators are added into a reactor; trichloromethane is used as a solvent; under the ultraviolet light irradiation, the reaction is carried out at -5DEG C to 40 DEG C for 8 to 48h; rotary evaporation is carried out to obtain plant oil-based cyclic carbonate prepolymers. The method has the advantages that high temperature, high pressure and catalysts are not needed; in addition, the connecting number of cyclic carbonate groups in the vegetable oil can be better designed and controlled; separation radicals exist between the prepared cyclic carbonate groups and vegetable oil fatty acid chains, so that the cyclic carbonate groups positioned at the end site have higher reaction activity. The method has the advantages that the preparing method is simple, the reaction condition is mild, the selectivity is high, and the product yield is high.

The invention relates to a long glass fiber reinforced polypropylene resin engine skid plate of a passenger vehicle, which is characterized in that the engine skid plate is prepared by using the long glass fiber reinforced polypropylene resins as a raw material through the steps of fusing the long fiber reinforced thermoplastics (LFT) into sheets; putting the obtained sheets into a mould for 40sec at the normal temperature according to a preset method; and carrying out mold stripping, wherein the pressure of the mould is 22MPa, and the pressure keeping time of the mould is 18sec. Because the whole forming process of the engine skid plate is implemented only through a single heating course, the energy consumption is low; meanwhile, the intermediate links such as storing, transporting and preheating prepreg materials are reduced, therefore, the energy consumption and manual work are saved, and the production cost is low.

The invention relates to a reinforced polypropylene resin material for passenger vehicle engine bottom guard plates, which is characterized by comprising a glass fiber / mineral powder reinforced polypropylene resin (PP+MD+GF) composite material in the following parts by weight: 68-78 parts of polypropylene, 22-25 parts of talcum powder and 3-7 parts of glass fiber. A mold pressing process of the bottom guard plate comprises PP+MD+GF material preparation, preheating and pressing. The invention has the advantages of low glass fiber content, light weight, low price and the like, and the molding process of mold pressing after plate preheating is used. The reinforced polypropylene resin material is beneficial to cost reduction and is applicable to economical passenger vehicle engine bottom guard plates.

The invention provides a gas density relay with an online self-checking function and a checking method thereof, which are used for high-voltage and medium-voltage electrical equipment. The gas densityrelay comprises a gas density relay body, a gas density detection sensor, a gas path partition pressure adjusting mechanism, an online checking contact signal sampling unit and an intelligent controlunit, wherein the intelligent control unit controls a partition piece of the gas path partition pressure adjusting mechanism to move, so as to partition the gas circuit connection of a first interface and a second interface; meanwhile, the volume of a sealed cavity is changed, and the gas pressure of the gas density relay body is slowly reduced so as to generate a contact action; the contact action is transmitted to the intelligent control unit by means of the on-line checking contact signal sampling unit, the intelligent control unit detects an alarm and / or locking contact signal action value and / or a return value according to a density value of the contact action, the checking can be completed without the need for a maintainer to go to the site, the reliability and efficiency of a powergrid are greatly improved, and the cost is reduced. Particularly, an electric control valve is not needed, so that the sealing performance is better, and the size is smaller.

The invention provides an electrical systemwith an online sampling checking function and a checking method of the electrical system. The electrical system and the checking method are applied to high-pressure and medium-pressure electrical equipment. The electrical system comprises electric equipment, a gas density relay, a gas density detection sensor, a valve, a pressure adjusting mechanism, an online check contact signal sampling unit and an intelligent control unit. Rising and dropping of pressure are adjusted by the pressure adjusting mechanism, so that the gas density relay of the electrical equipment perform a contact action, the contact action is transmitted to the intelligent control unit through the online check contact signal sampling unit, the intelligent control unit detects anaction value and / or a return value of an alarm and / or lockout contact signal according to a density value during contact action, the checking work of the gas density relay can be completedwithout a maintainer coming to the site, so that reliability of a power grid is greatly improved, the efficiency is improved, the cost is reduced, meanwhile, mutual self-checking between the gas density relay and the gas density detection sensor is realized, and maintenance-free operation is realized.

The invention provides a car air-conditioning heat pump system adopting an environment-friendly refrigerant. The car air-conditioning heat pump system further comprises a compressor, an indoor side heat exchanger, a throttle valve and an outdoor side heat exchanger which are sequentially connected to form a closed loop, and the environment-friendly refrigerant adopted by the car air-conditioning heat pump system is prepared from four components in percentage by mass: 4%-8% of the first component, 4%-80% of the second component, 4%-88% of the third component and 4%-88% of the fourth component.GWP of the adopted refrigerant is less than or equal to 150, environment-friendly performance is good, and requirements of environment-friendly regulations in all global regions are met. Thermal performance of the car air-conditioning heat pump system is equivalent to or more superior to a refrigeration system heat pump system using R134a, and thus the car air-conditioning heat pump system adopting the environment-friendly refrigerant is used for replacing a car air-conditioning heat pump system adopting an R134a refrigerant.

The invention discloses a solid vortex centrifugal separation device and an oil spillingskim separating method thereof. The solid vortex centrifugal separation device comprises an outer support, a columnar rotary drum, an inlet pipeline, a pre-rotary guide vane, gratings, a central fixing shaft, a water phase overflow weir, an oil phase overflow weir, a water phase outlet pipe, an oil phase outlet pipe and a gas phase outlet pipe, wherein the inlet pipeline and the columnar rotary drum are coaxial, the pre-rotary guide vane is arranged at the tail end of the inlet pipeline, and the columnar rotary drum is divided into a plurality of mutually independent fan-shaped separation zones by the gratings. The columnar rotary drum is driven to rotate and produce a centrifugal force by adopting an electric motor so as to perform gradual water phase and oil phase separation, a separated oil phase flows into the oil phase outlet pipe through the oil phase overflow weir and is discharged into an oil storage cabin of an oil spilling chip. Water reaching the standard is directly discharged out through the water phase overflow weir and the water phase outlet pipe. Theseparation device is small in size, good in applicability, stable in operation and high in separation efficiency, can achieve efficient oil and water separation without any reagent and meets the requirements of oily water separating devices for oil spilling ships, and the separation efficiency can be up to 99%.

The invention discloses a copper-free friction material and a brake pad prepared based on the copper-free friction material. The copper-free friction material is characterized in that anisotropic heatconduction materials and isotropic heat conduction materials are adopted and combined to form a heat conduction system, the isotropic heat conduction materials are evenly and randomly distributed andfill among anisotropic heat conduction material particles, the anisotropic heat conduction materials are connected, and the effect of replacing metal copper is achieved; and the scheme of the copper-free friction material is an environment-friendly friction material. According to the copper-free friction material and the brake pad, the brake pad prepared based on the friction material has the special heat conduction characteristics that the heat conductivity in the direction of the friction surface is very good, the heat conductivity in the thickness direction of the brake pad is relatively low, in the braking process, the brake pad can release heat generated by braking in time, local hot spots are prevented from being formed on the brake pad or a brake disc, and therefore, the copper-free friction material has very good characteristics of recession resistance, wear resistance, shaking resistance and the like.

The invention provides a gas density relay with an online self-calibration function and a calibration method thereof, which are applied to high-voltage and medium-voltage electrical equipment. The gasdensity relay with the online self-calibration function comprises a gas density relay body, a gas density detection sensor, a normally-open valve, a normally-closed valve, an air chamber, an online calibration contact signal sampling unit and an intelligent control unit. Rise and fall of gas pressure are realized through the normally-open valve, the normally-closed valve and the air chamber, andthe gas density relay body is allowed to perform contact signal action; the contact signal action is transmitted to the intelligent control unit through the online calibration contact signal samplingunit; and the intelligent control unit detects an alarm and / or latching contact signal action value and / or a return value of the gas density relay body according to the density value obtained during the contact signal action, and calibration of the gas density relay can be completed without maintenance personnel going on site, thereby realizing maintenance-free, greatly improving reliability of apower grid, improving efficiency and reducing cost. Meanwhile, in the whole calibration process, zero emissions of gas, environmental protection, safety and economy are achieved.

The invention discloses a remote transmission gas density relay system and a verification method thereof, and the system comprises a background monitoring terminal which achieves the remote communication with at least one gas density monitoring device through communication equipment, and completes the online monitoring and verification of a gas density relay; the gas density monitoring device which comprises a gas density relay, a gas density detection sensor, a pressure regulating mechanism, a valve, an online check contact signal sampling unit and a circuit control part; a background monitoring terminal which controls the intelligent processor to close the valve. The pressure adjusting mechanism is used for adjusting the pressure to rise and fall through; the gas density relay is subjected to contact action; the signals are transmitted to the intelligent processor through the online check contact signal sampling unit, and the intelligent processor detects a contact signal action value and / or a return value according to the gas density value when the contact acts, so the remote verification of the gas density relay can be completed without the need for maintainers to go to the site; meanwhile, the maintenance-free can be achieved, and the benefits and reliable and safe operation of a power grid are greatly improved.

The invention discloses a production method of environment-friendly high-strength reclaimed butyl rubber, which comprises the following steps: selecting good quality waste butyl rubber inner tube, and crushing into sheets; screening and magnetic separation; adding environment-friendly rubber softener and reinforcing agent for stirring so as to form a composition material; desulfuration and extraction; refining; filtering; and forming. According to the invention, the reclaimed butyl rubber is ensured in quality as good quality butyl rubber material is selected; the reclaimed butyl rubber conforms to requirements of environment-friendly laws and regulations of European Union as no contaminative rubber softener is added during the regeneration process, and also extracting process is added for extracting original rubber aromatic oil. The invention also discloses a composition material formula of the reclaimed butyl rubber. According to the invention, through improving formula processes and finely selecting raw materials, the tensile strength of the produced reclaimed butyl rubber is kept in the range of 8.5-9.5 MPa which is far higher than the national standard of being larger than or equal to 6.8 MPa.

The invention relates to a field hokey injection molding material and a preparation method thereof. The field hokey injection molding material is characterized by comprising the following components by mass percent: 30-40% of SBS (styrene-butadiene-styrene block copolymer) elastomer resin, 5-20% of SEBS (hydrogenated styrene-ethylene-butylene-styrene block copolymer) elastomer resin, 5-12% of POE (polyolefin elastomer), 20-45% of extending oil, 10-40% of solid powder filling material, 0.1-5% of compatilizer, 0.1-2% of antioxidant and 0.01-2% of processing aid.

The invention relates to a preparation method of a degreasing and level dyeing composite emulsifier for polyester fabrics, and belongs to the field of textile aids. In the traditional process, degreasing and level dyeing are performed in two steps, such that the production process is long, and the consumption of water and electricity is more. According to the present invention, the composite emulsifier is formed by mixing the following components by mass: 18-22% of tristyrylphenol polyoxyethylene polyoxypropylene ether benzoate, 8-12% of tristyrylphenol polyoxyethylene polyoxypropylene ether ammonium sulfate, 8-12% of isotridecanol polyoxyethylene polyoxypropylene ether sodium sulfate, 3-7% of isotridecanol polyoxyethylene ether, and the balance of water; the composite emulsifier does notcontain phosphorus, has good degreasing property, good dyeing retarding property and good transferability, and has little influence on the dye uptake rate of dyes; and the degreasing and the dyeing are integrated so as to shorten the dyeing and finishing process, improve the production efficiency, reduce the production cost, and achieve the purposes of energy saving and emission reduction.

The invention relates to a gas density relay. The invention discloses an on-line calibration method for a field gas density relay. A pressure adjustable mechanism, an electric control valve, at leastone pressure sensor, at least one temperature sensor, at least one intelligent control unit and a contact signal sampling unit are included. The pressure adjustable mechanism is controlled through theintelligent control unit; the gas pressure of the gas density relay is increased and decreased; the gas density relay is enabled to generate contact action; the contact action is transmitted to the intelligent control unit through the contact signal sampling unit, the intelligent control unit obtains a gas density value according to a pressure value and a temperature value during the contact action or directly obtains the gas density value, the contact signal action value of the gas density relay is detected, and the verification work of the contact signal action value of the gas density relay is completed. According to the invention, gas density relays of various measurement principles can be accurately calibrated on site, the reliability is high, the cost is reduced, the economic benefit is greatly improved, and the safety and reliability of a power grid are improved.

The invention relates to a long glass fiber reinforced PP (polypropylene) pedal for a commercial vehicle. The long glass fiber reinforced PP pedal is characterized in that a particular method includes: (1), glass fiber zero-twisted roving is adopted, glass fibers pass through a mold head capable of being soaked in thermoplastic plastics by the aid of traction equipment, the temperature of the mold head ranges from 200 DEG C to 230 DEG C, the back pressure of the mold head ranges from 0.5MPa to 2MPa, the zero-twisted roving is forcedly scattered in the mold head, and is soaked in melted resin, accordingly, each fiber is sufficiently covered by the resin, and the fibers are cut into longer granules with lengths ranging from 10mm to 25mm to be reserved after being cooled; and (2), the pedal is designed into a structure by the aid of CAE (computer aided engineering) analysis and MFlow analysis, the peripheral edge of the structure is thickened, a U-shaped groove is arranged in the middle of the structure, rigid straight edges of the structure are crossed, and the granules are filled in a mold so that the pedal is processed. The long glass fiber reinforced PP pedal has fine impact resistance, corrosion resistance and excellent low-temperature performances, is lighter in weight (lighter than an aluminum pedal by 40% at least) and low in cost (lower than the aluminum pedal by 20%), meets requirements of environment protection laws and regulations on automobiles (a product can be recycled), is high in production efficiency, can be applied onto automobiles in various types, and has extremely wide application prospect.

The invention discloses a multifunctional textile finishing agent and a preparing method thereof. According to the preparing method, long-carbon-chain alkyl primary amine, an epoxy bi-end-blocking agent, gamma-piperazine propyl methyl dimethoxy silane, octamethyl cyclotetrasiloxane and long-carbon-chain alkyl acyl chloride are adopted as raw materials to synthesize the organic silicon multifunctional finishing agent; long-carbon-chain alkyl molecular chain segments are introduced into the two ends of polysiloxane molecule chain segments containing piperazinyl groups and the piperazinyl groups,so that yellowing of a nylon textile after finishing is reduced, and the nylon textile is endowed with soft, smooth and fluffy handfeel; meanwhile, by using good water resistance of the polymethylsiloxane chain segments and the long-carbon-chain alkyl chain segments, the nylon textile is endowed with good water resistance. Depending on a structural similarity effect principle, under a high-temperature baking condition, by using the amide group molecule chain segments which are contained in the organic silicon multifunctional finishing agent molecular structure to form eutectic with molecularchain segments of polyamide fibers, the nylon textile is endowed with multiple functions of washing resistance and water resistance, does not contain fluorine and formaldehyde and accords with environmental protection requirements.

The invention discloses a paint spraying and plastic spraying equipment painting mist circulating recycling system and a full-automatic paint spraying and plastic spraying device. The painting mist recycling system includes at least two recycling barrels and a circulating delivery pipe, wherein the two adjacent recycling barrels communicate through a communication bridge, a connecting pipe is arranged at the top of the recycling barrel on the front part and used for being connected with the bottom of a spray chamber of the paint spraying and plastic spraying equipment, two openings are formedin the top of the recycling barrel on the tail part, an air fan for blowing-in is arranged in one opening, the other opening communicates with the top of the spray chamber of the paint spraying and plastic spraying equipment through the circulating delivery pipe, and an air fan for blowing air into the circulating delivery pipe is arranged in the opening connected with the circulating delivery pipe. According to the paint spraying and plastic spraying equipment painting mist circulating recycling system and the full-automatic paint spraying and plastic spraying device, remaining paint in the spray chamber is quickly recycled, painting mist is recycled and circulated, it is guaranteed that the painting mist is not overflowed in the painting process, the working environment of a painting workshop is improved, paint waste is lowered, energy saving and environmental protection are achieved, and automatic production requirements of the paint spraying and plastic spraying device are met.

The invention provides a gas density relay with an on-line self-checking function and a checking method thereof. The gas density relay is applied to high-voltage and medium-voltage electrical equipment and comprise a gas density relay body, a gas density detection sensor, a multi-way joint, a temperature adjusting mechanism, an on-line checking contact signal sampling unit and an intelligent control unit, wherein the temperature of the gas density relay is enabled to rise through controlling the temperature adjusting mechanism by the intelligent control unit, thus the temperature of a temperature compensation element of the density relay rises, the gas density relay body is subjected to a contact action, the contact action is transmitted to the intelligent control unit through the on-linechecking contact signal sampling unit, the intelligent control unit detects a contact signal action value and / or a return value of the gas density relay body according to the density value during thecontact action so as to complete the check work of the gas density relay. The check work of the gas density relay can be accomplished without a need of requiring the maintenance personnel to go to thesite, the reliability of the power grid is greatly improved, the efficiency is improved, and the cost is reduced.

The invention provides an improvement method for a gas density relay. The method is applied to high pressure and low pressure electrical equipment. A gas density detection sensor, a temperature adjusting mechanism, an online check contact signal sampling unit and an intelligent control unit are added on a conventional gas density relay body. The temperature adjusting mechanism adjusts rise and fall of temperature of a temperature compensation element of the gas density relay, so as to enable the gas density relay body to perform a contact operation, the contact operation is transmitted to theintelligent control unit through the online check contact signal sampling unit, the intelligent control unit detects an alarm of the gas density relay body and / or locked contact signal operation valueand / or return value according to a density value of the contact operation. Maintenance workers can complete checking of the gas density relay without going to the site, so that the power grid stability is improved greatly, the gas density relay can be checked without installing a valve joint, the efficiency is improved, and the cost is lowered.

The invention provides a gas density relay with an online self-checking function and a checking method thereof. The gas density relay comprises a gas density relay body, a gas density detection sensor, a check valve, a pressure adjusting mechanism, an online checking contact signal sampling unit and an intelligent control unit. A moving part of the pressure adjusting mechanism is driven by a driving part to move so that the check valve is closed; a volume of an air chamber of the pressure regulating mechanism changes along with movement of the moving part; pressure of the gas density relay body is adjusted to rise and fall; the gas density relay body is subjected to contact action; the contact action is transmitted to the intelligent control unit through the online checking contact signalsampling unit; and the intelligent control unit detects a contact signal action value according to a density value during contact action. Verification can be completed without the need for maintainersto go to the site, reliability and efficiency of a power grid are improved, cost is reduced, and particularly, the check valve is adopted to close a gas circuit so that during operation and verification, sealing performance is better, a size is smaller, reliability is higher, and a service life is longer.

The invention discloses an environment-friendly softener for tire rubber. In order to overcome the deficiencies of the existing tire rubber softener containing toxic and harmful substances, pungent smell, and serious pollution, the present invention first draws soybean oil pitch 29 and cottonseed oil pitch 50 into the reactor by vacuum and heats them to 80° C. Minutes 60, turn to vacuum and stir for 1 hour, then add tall oil pitch 10, fennel oil 10 to the reactor, stir in vacuum for 30 minutes, finally add rosin or tall oil rosin 1 into the reactor, mix, heat to 120°C, and stir in vacuum for 30 minutes , get the finished product. The invention is used as a softener for tire rubber, which does not contain poisonous and harmful substances, has no pungent smell, is non-toxic and tasteless, is environmentally friendly and has excellent performance.

The invention provides a maintenance-free gas density relay and a calibration method thereof. The maintenance-free gas density relay comprises a gas density relay body, a gas density detection sensor,a gas circuit turn-off pressure regulating mechanism, an online calibration contact signal sampling unit and an intelligent control unit. The intelligent control unit makes a driving part of the gascircuit turn-off pressure regulating mechanism drive a pressure changing part to move so that a cut-off piece cuts off a gas circuit between the electrical equipment and the gas density relay body; and meanwhile, movement of the pressure change piece enables a volume of a gas chamber of the gas circuit turn-off pressure regulating mechanism to change so that the gas density relay body generates contact action, the intelligent control unit detects a contact signal action value according to a density value during the contact action, operation and maintenance personnel do not need to go to the site, and maintenance-free performance of the density relay is realized. And particularly, the gas circuit turn-off pressure regulating mechanism comprising the cut-off piece and an elastic piece is adopted so that problems of gas circuit shutoff and pressure regulation are solved, and sealing performance is good, a size is small, reliability is high and a service life is long during operation and calibration.

The invention relates to a bag type dust collector modified from an electric dust collector. The bag type dust collector comprises a bracket, a box, a spraying blowing device, a filtering bag component and a control device, wherein the filtering bag component is composed of a filtering bag and a bag cage; a pneumatic butterfly valve is arranged on an air inlet channel in the box; an air inlet channel switching mechanism is arranged on the upper surface of the box; an ash bucket is arranged on the lower surface of the box; the spraying blowing device is connected with an air compressing device through a pipeline; the air compressing device is connected with the pneumatic butterfly valve; the control device comprises an impulse controller; the impulse controller is connected with the spraying blowing device through a circuit; the control device comprises a PLC (Programmable Logic Controller); and the PLC is connected with the pneumatic butterfly valve through a solenoid valve. Compared with the prior art, the present electric dust collector is modified into the bag type dust collector according to the invention, so that the materials are saved, the modifying cost is lowered, the de-dusting effect is good and the present national environmental protection regulation demand is met. The PLC is adopted by the bag type dust collector for automatically adjusting pulse intervals, the spraying blowing times is reduced and the service life of the easily damaged parts is prolonged.

The invention provides a gas density relay with an online self-calibration function and a calibration method thereof for high-voltage and medium-voltage electrical equipment. The gas density relay comprises a gas density relay body, a gas density detection sensor, a multi-way connector, a pressure adjustment mechanism, an on-line calibration connection point signal sampling unit and an intelligentcontrol unit; a valve is partially or fully embedded in the multi-way connector, or the valve and the multi-way connector are integratedly designed. The pressure rise and fall are adjusted by the pressure adjustment mechanism, so that the connection point action of the gas density relay body occurs, and the connection point action is transmitted to the intelligent control unit through the onlinecalibration connection point signal sampling unit; the intelligent control unit detects an operation value and / or a return value of a connection point signal of the gas density relay body according tothe density value of the connection point during action; the calibration work of the gas density relay can be completed by a maintainer without the need to be on-site, thereby improving the reliability of a power grid, improving the work efficiency and reducing the cost.

The invention provides a gas density relay with an on-line self-checking function and a checking method thereof. The gas density relay comprises a gas density relay body, a gas density detection sensor, a pressure regulating mechanism, a gas flow limiting piece, an on-line checking contact signal sampling unit and an intelligent control unit. During verification, the gas flow flowing to the gas density relay body through the gas flow limiting piece is insufficient to synchronously compensate the pressure drop of the gas density relay body adjusted by the pressure adjusting mechanism, and thenthe gas pressure of the gas density relay body is reduced; the gas density relay body is subjected to contact action, and the contact action is transmitted to the intelligent control unit through theon-line verification contact signal sampling unit; and the intelligent control unit detects a contact signal action value and / or a return value of the gas density relay body according to the density value during contact action, online verification can be completed without a control valve or a maintainer on site, maintenance is avoided, the reliability of a power grid is improved, and the cost is reduced.