41 results about "Smoke flow" patented technology

The application provides a range hood, and relates to the technical field of kitchen appliances. The range hood comprises a main machine box, a fan and a flow guide piece. The fan is arranged in the main machine box, and the fan has a fan inlet. The flow guide piece is arranged in the main machine box, one end of the flow guide piece is connected with the fan, and a pre-rotation fan is arranged in the flow guide piece, and the pre-rotation fan is used for pre-straightening smoke flowing into the flow guide piece. In this way, the range hood has smaller noise and higher smoke exhaust efficiency.

The application provides a heater air inlet and exhaust device for a travel vehicle, and belongs to the field of travel vehicle heater accessories. The device comprises a nested exhaust pipe, an air inlet pipe, a positioning frame and a cover. An annular fixing plate is arranged between the exhaust pipe and the air inlet pipe, a first baffle is arranged in the inner cavity of the exhaust pipe, the first baffle is connected with a second baffle, the inside of the cover is divided into upper and lower areas by means of the above structure, the smoke flow space and the air inlet flow space are distinguished, and smoke backflow is effectively prevented. The side wall of the cover is provided with a louvered second smoke outlet, the bottom end is provided with a second air inlet, the bottom end of the air inlet pipe is provided with a first air inlet, and the two air inlets are communicated to form an air inlet passage. The air inlet pipe and the cover jointly form an annular drainage groove, which can timely drain the water accumulated in the exhaust pipe. The device only needs to be opened at a single position of the vehicle body, has the functions of preventing smoke backflow, preheating air inlet, automatically sucking air inlet by smoke negative pressure, collecting and discharging condensate water, has a compact structure and stable operation, and is suitable for various travel vehicle parking heaters.

The utility model relates to the field of integrated cooker, specifically disclose a kind of exhaust pipe connecting head for integrated cooker, the flue of reverse T shape is formed in joint main body, the top of joint main body forms upper interface, the left and right sides of joint main body are equipped with the side interface of connectable exhaust pipe;It further includes detachably connected the cover of one side interface, cover is located in flue and connects guide block one side, guide block other side forms the guide surface that oil smoke is guided to another side interface, guide surface is curved into arc from top to bottom, arc surface is close to upper interface below, the bottom of joint main body is concave and forms oil receiving groove, oil receiving groove is equipped with oil discharge hole, and oil discharge hole is connected with oil outlet valve. Two side interfaces can be connected with exhaust pipe, increase the smoke exhaust volume;One side interface can be selected to be connected, cover closes another side interface, facilitates changing smoke direction in later period, guide block and guide surface guide the oil smoke flowing to cover to exhaust smoke;Oil groove collects oil dirt, and is discharged through oil discharge joint.

This utility model discloses a baffle switch structure for a cylindrical range hood, comprising: a range hood body, an air inlet at the bottom of the range hood body and a flat panel light assembly located below the air inlet, the projected area of ​​the flat panel light assembly along the direction of gas intake completely covering the air inlet, the range hood body having an outer shell portion located on the periphery of the flat panel light assembly, and an annular air intake gap connected to the air inlet being defined between the outer shell portion and the flat panel light assembly. In this range hood structure, the flat panel light assembly is located at the bottom of the range hood body opposite the air inlet. When negative pressure suction is generated inside the range hood body, some of the smoke flows upward and contacts the lower surface of the flat panel light assembly before flowing towards the air intake gap, while some smoke directly enters the air intake gap and is thus sucked away through the air inlet. The flat panel light assembly serves both as a baffle for the range hood and as a lighting fixture; the flat panel light assembly can be designed with a large area, which is beneficial for widening the illumination range and achieving the function of large-area lighting.

The utility model provides a kind of smoke hood and have its range hood, belong to kitchen appliance technical field, the smoke hood is connected in the front opening of smoke machine shell, it includes two guide grooves and two air inlets, the cavity of the smoke cavity is recessed to the inside of smoke machine shell, the longitudinal section of the smoke cavity is triangle, and the smoke cavity includes rear side wall;Two guide grooves are formed by the recess of rear side wall to the inside of smoke machine shell respectively, the slot bottom of each guide groove is equipped with air inlet, wherein, the flow area of guide groove is continuously tapered structure along the smoke flow direction, and at least one slot wall of guide groove forms inclined flow guide surface, to guide flow to air inlet with smoke.The utility model can produce downward pressure in the upper portion of air inlet, when oil fume produces rising, can lock more oil fume, reduce the escape of oil fume;Enhance the flow guide to smoke, improve the effect of smoking, reach the purpose of quickly sucking away oil fume and reducing noise.

The present application relates to the technical field of physiotherapy device, and specifically relates to a multifunctional intelligent fire dragon jar device, which comprises a jar body, a lotus-shaped jar opening is fixedly connected to the bottom of the jar body, a temperature acquisition assembly is arranged on the inner side wall of the jar opening, and the temperature acquisition assembly is signal-connected with a control system; a shelf plate is fixedly connected to the top of the jar body, a fixing piece is fixedly connected to the bottom of the shelf plate, a smoke flow guiding assembly is arranged on the top of the shelf plate, and a smoke collecting pipe is integrally formed on the top of the jar body; a purification assembly is arranged on the outside of the jar body, and the purification assembly is responsible for purifying and discharging the flowing collected smoke; an operation indication assembly is assembled on the top of the smoke collecting pipe; the present application integrates the real-time temperature detection of the jar opening, the guiding, collecting, regulating and controlling of the smoke body, the purification, filtering and discharging of the smoke body in the process of using the fire dragon jar by the operator on the intelligent fire dragon jar, and optimizes the design in view of the defect that the temperature is difficult to regulate in the process of the conventional fire dragon jar.

This invention provides a multi-puff electronic cigarette cartridge and an electronic cigarette system used in conjunction with the cartridge. The cartridge includes a cartridge shell (9) and a cartridge bottom cover (5). The bottom cover (5) has a vertically penetrating atomizing carrier cavity (51) in the middle, and the atomizing carrier cavity (51) houses the oil-storing heating component. The oil-storing heating component includes a magnetic heating element (6) and an electronic cigarette atomizing carrier (7) fitted together. The magnetic heating element (6) is at least partially hollowed out in a tubular shape, and at least part of the material of the magnetic heating element (6) is metal. The middle part has a smoke flow channel (61) arranged along the length direction. Electronic cigarette atomizing agents are adsorbed in the electronic cigarette atomizing carrier (7). The cartridge of this invention sets the magnetic heating element and the electronic cigarette atomizing carrier together and installs them in the bottom cover, which has the characteristics of simple structure and easy manufacturing.

The application provides a smoking device, a smoke cartridge, a smoking body and a preparation method. The preparation method of the smoking body comprises the following steps: preparing a wire body; wherein the wire body contains a smoking medium; and connecting a plurality of wire bodies in a circumferential direction to form a smoking body. The preparation method of the smoking body provided in the application can form a stable and predictable smoke passage between adjacent wire bodies by designing a wire body structure that is in contact with each other and extends in a predetermined direction, thereby stabilizing the smoke flow and improving the smoking effect.

The utility model relates to desulfurizing tower technical field discloses a kind of wet flue gas desulfurization tower, including tower body, desulfurization component and be used for the spray of the spray component to desulfurization component, tower body is equipped with air inlet and air outlet, desulfurization component is arranged in tower body, desulfurization component includes sieve plate and multiple baffle, the outer periphery of sieve plate is connected with the inner wall of tower body, multiple baffle is spacedly installed at the top of sieve plate, form pass-through smoke channel between adjacent two baffle, baffle is corrugated plate, two side walls of pass-through smoke channel respectively are equipped with a group of baffle, two groups of baffle in pass-through smoke channel are staggered arrangement in the direction of smoke flow, pass-through smoke channel is filled with filler;The utility model cooperates through serpentine pass-through smoke channel and baffle, reduce the flow speed of flue gas and treatment solution, prolong residence time, to improve the reaction length of flue gas and treatment solution, improve desulfurization efficiency.

The application discloses a cartridge and a battery device. The battery device comprises a sensor and a heating element. The cartridge comprises a liquid storage cavity, a liquid suction element, a liquid outlet, an air inlet, an atomization cavity and a smoke outlet. The liquid outlet is connected with the liquid storage cavity and the atomization cavity. The liquid suction element is arranged between the liquid outlet and the atomization cavity. The atomization cavity and the air inlet are both connected with the smoke outlet. The air inlet is arranged in parallel with the atomization cavity along the axial direction of the cartridge. When the cartridge is combined with the battery device, the air inlet is also connected with the space where the sensor is located. The heating element is arranged in the atomization cavity. Under the action of suction, the air in the space where the sensor is located is sequentially sucked out through the air inlet and the smoke outlet at least partially, so that the sensor generates a suction signal. The heating element heats the tobacco liquid supplied by the liquid storage cavity according to the suction signal, so as to form smoke. The smoke flows out through the smoke outlet. The cartridge of the application is arranged with the air inlet in parallel with the atomization cavity along the axial direction of the cartridge, so that the condensed liquid or the tobacco liquid can be effectively prevented from flowing out from the atomization cavity through the air inlet, and liquid leakage can be avoided. The application further discloses an electronic cigarette with the cartridge.

The application discloses a remote intelligent fire-fighting management method based on big data analysis and relates to the technical field of big data analysis, which comprises the following steps: collecting multi-source fire-fighting operation state data to generate standard operation time sequence data; discretizing a target fire-fighting area into spatial grid units to construct smoke flow vortex distribution parameters; constructing a fractional order Eikonal equation to generate a dynamic risk front arrival time field; constructing a time sequence safety margin field to extract a space-time safety channel set; performing dynamic graph theory homology analysis to determine a path adsorbable area; constructing a curvature limited path generation module based on a Dubins path to generate a Dubins-Vortex constrained candidate path set; calculating comprehensive value and sorting to generate a remote fire-fighting linkage control strategy. The application realizes remote fire-fighting disposal path collaborative scheduling under a complex fire field environment by introducing the Eikonal equation and the Dubins path method.

The utility model relates to dust removal technical field discloses a kind of smoke-proof dust removal water film dust collector spray angle adjusting devices, including dust removal bin, the front surface of dust removal bin is fixedly installed with three water supply pipes, the water outlet end of three water supply pipes is all through to the inside of dust removal bin, the water outlet end of three water supply pipes is all fixedly installed with connector, the outer surface of three connector is all rotationally installed with semicircular plate, auxiliary mechanism is set on water supply pipe and semicircular plate, auxiliary mechanism includes first L-shaped plate and two mounting plates, by motor drive solid cone nozzle rotation, can be according to smoke flow, dust concentration dynamic adjustment spray angle, make water film cover more evenly, enhance the capture ability to dust, when shutdown, solid cone nozzle outer surface can be cleaned automatically using bristle, prevent dust accumulation and scale solidification, reduce the damage risk of nozzle due to blockage, reduce cleaning time, to improve the cleaning efficiency of the dust collector.

The application discloses a valve interface air tightness detection structure and particularly relates to the field of valve interface detection, which comprises a detection table, the top of the detection table is provided with a valve body, and the two sides of the valve body are communicated with valve interfaces; the valve body is stably clamped by a plurality of clamping plates, then the valve interfaces on the two sides of the valve body are blocked by the right plug cylinder and the left plug cylinder on the two sides, and the right plug cylinder side air cylinder can send the dust smoke flow into the valve body, the filled smoke flow is diffused in the valve body under the action of continuous pressurization, the detection effect is improved, the detection result can be intuitively reflected through the smoke flow sprayed when there is air leakage, and the smoke flow in the valve body is sucked out by the negative pressure generated by the reversely moving piston plate in the air cylinder after the detection is completed, so that unnecessary influence of the smoke flow on the valve body is avoided.

The utility model discloses a kind of double medium biomass water-cooled vibrating grate boiler and heating system.The double medium biomass water-cooled vibrating grate boiler includes furnace body, water-cooled vibrating grate, heat exchanger, evaporator and steam drum.The inner cavity of furnace body is divided into communicating front chamber and rear chamber by vertically arranged partition wall, forming the smoke flow channel of bending, the front chamber is equipped with feed inlet, the rear chamber is equipped with smoke outlet;Water-cooled vibrating grate is arranged at the bottom of the front chamber;Heat exchanger is arranged in the rear chamber, for external heating;Evaporator is arranged in the rear chamber and located downstream of the flow channel of heat exchanger;Steam drum is connected with the evaporator by first pipeline, for external heating.This application uses two kinds of heat transfer medium with different temperature parameters, solves the problem of single medium boiler heating temperature fixed.And multi-stage heat exchange, heat in flue gas can be more thoroughly absorbed.At the same time, the present application is provided in a furnace body smoke flow channel, and the smoke flow is short.

The utility model relates to flue gas treatment equipment technical field, concretely is a carbon monoxide removal device, include: mixing subassembly, mixing subassembly includes mixing pipe, and mixing pipe is connected with reaction subassembly, and reaction subassembly includes reaction jar, and the catalytic device is equipped in reaction jar, and the catalytic device upper and lower sides are equipped with adjusting assembly, and adjusting assembly is used for controlling the flue gas amount through catalytic device. The utility model, utilize fixed fan blade and rotating fan blade cooperation, can change the smoke flow direction, promote flue gas mixing, make the material distribution in flue gas more uniform, to make the catalyst catalysis more fully, reduce pollutant escape, improve the service life of catalyst simultaneously, utilize drive arrangement and change the angle of adjusting plate, can change the flue gas flow of different area, cooperate with the isolation frame and the partition, can realize that part catalyst place has no flue gas, realize the replacement of catalyst at the same time without affecting flue gas treatment.

The utility model discloses a kind of fiber filter tip, it is related to filter tip technical field, including filter tip body, the inside of filter tip body is sequentially provided with first filter layer, second filter layer and third filter layer;Rotary rod is rotatably arranged in the inside of filter tip body, and the surface of rotary rod is provided with circular baffle, and the both ends of rotary rod pass through filter tip body and are respectively connected with nut and knob;The diameter of baffle is same with the inner diameter of filter tip body;The surface of nut and filter tip body is contacted.The utility model in the present application, by rotating knob, the position of circular baffle in filter tip can be changed, and then the cross-sectional area of airflow passage is adjusted, when the gap between baffle and filter tip inside increases, smoke flow rate accelerates, taste is more intense;When gap reduces, flow rate reduces, taste is more soft, this adjustment mode can satisfy the individualized demand of different users to smoke density, improve the satisfaction of smoking.

The utility model discloses a collection testing device of asphalt mixture smoke in the mixing process, it includes the smoke enrichment outer cover for the mixing pot top of automatic asphalt mixture mixing machine, the smoke enrichment outer cover with automatic asphalt mixture mixing machine's elevating mixing arm fixed connection, the top of smoke enrichment outer cover is provided with two connecting holes, and one connecting hole is connected with gas sampling equipment through smoke flow guide pipeline, and another connecting hole is connected with the air -pumping pump through the air -pumping pipeline, and is installed with PTFE filter membrane box no.

The objective is to provide a smoke appreciation device that generates a stream of smoke from incense, allowing for visual enjoyment. [Solution] The smoke viewing device 1 is a device that generates a smoke flow by causing smoke to fall, and comprises a first member 2 in which a first incense 7 is installed and which has a hole 2a through which smoke passes, a cylindrical container 3 positioned below the first member 2 and which receives the smoke generated from the first incense 7 and descends inside, and a second member 4 positioned below the cylindrical container 3 and which has an opening 4a that allows smoke to be released to the outside, and which has a holding member 5 that receives the smoke and can hold a second incense.

The utility model relates to a continuous viscous liquid cooking device belongs to the technical field of cooking device, include: heating box, combustion furnace, the baffle with the smoke hole and through the communicating pipe series intercommunication lower cooking pipe and upper cooking pipe that have communicated, combustion furnace is fixed in heating box bottom end, the baffle is fixed in heating box inside, lower cooking pipe is fixed in heating box inside and its pipe wall is equipped with liquid inlet, upper cooking pipe is fixed in heating box inside and its pipe wall is equipped with liquid outlet hole. The utility model utilizes the baffle first and divides heating box inside into upper heating area and lower heating area, can make the smoke flow direction in upper heating area and the smoke flow direction in lower heating area are opposite, prolong the residence time of high temperature flue gas in heating box, then utilize the lower cooking pipe and upper cooking pipe that have communicated in series respectively in upper heating area and lower heating area, can gradually heat viscous liquid in the process that viscous liquid flows through lower cooking pipe and upper cooking pipe in proper order, realizes the continuous heating of viscous liquid.

This invention relates to the field of tunnel technology and provides a method for designing the diversion angle of a tunnel smoke exhaust cross passage diversion structure. The method determines the change in momentum loss with flow distance when smoke flows along the diversion plane based on the boundary layer momentum integral relationship. An adhesion margin, quantified by the boundary layer shape factor, is introduced at the end of the diversion plane. The feasibility of the diversion angle is judged by the condition that this adhesion margin is not lower than the safety lower limit calibrated based on turbulence separation experimental data. Based on this judgment condition, the diversion angle is gradually increased, and the above steps are repeated until the adhesion margin approaches the safety lower limit. The maximum allowable diversion angle is then determined as the design diversion angle. This invention directly links the diversion angle to tunnel engineering parameters, enabling quantitative prediction of flow separation risks. The final selected diversion angle effectively suppresses boundary layer separation to ensure smoke exhaust efficiency while also considering civil engineering economics. The design results are scientifically based and repeatable.

The application discloses a vertical heat exchanger and relates to the technical field. The heat exchanger comprises a heat exchanger main body, an auxiliary heat exchanger assembly connected to the outside of the heat exchanger main body and a mandrel connected to the inside of the heat exchanger main body. A guide space is formed between the auxiliary heat exchanger assembly and the heat exchanger main body. The mandrel is provided with a flow channel for smoke flow. The heat exchanger is favorable for guiding the fluid inside the heat exchanger, better heating or cooling the second heat exchange medium in the heat exchanger main body, enhancing the heat exchange efficiency and improving the heat exchange effect. The smoke generated by the engine is collected from the flow channel in the inside of the mandrel, and the waste heat generated by the smoke exchanges heat with the second heat exchange medium in the heat exchanger main body, further improving the heat exchange efficiency.

The utility model relates to food processing technical field discloses a kind of smoking roasting device for sausage processing, including smoking roasting oven, the lower end of smoking roasting oven is fixedly installed with smoke generator, the inner chamber upper end of smoking roasting oven is provided with multiple hangers, hanger is detachably connected with rotating motor, the upper end of smoking roasting oven both sides is communicated with smoke exhaust passage, the lower end of smoking roasting oven is communicated with multiple smoke guide column.The utility model technical scheme can make winding drum to be rolled up to thin steel wire rope, thin steel wire rope drives dredging frame to move downward, makes dredging frame drive scraping ring to move along, makes scraping ring to scrape and clean the inner wall of smoke guide column, to avoid dust adheres too much to influence smoke guide column smoke flow problem, ball on rack can also move along, make ball to wedge-shaped block, wedge-shaped block drives support plate to rotate upward, to pour out after burning combustion in smoke generator, to facilitate staff cleaning.

This utility model provides a chimney device with waste heat recovery, relating to the field of chimney device technology. It includes a flue and a descaling assembly. The descaling assembly includes a fixed frame fixedly connected inside the flue, a sliding frame slidably connected to the fixed frame, a return spring fixedly connected to the sliding frame via a connecting rod, a fan blade slidably connected to the fixed frame, a rotating shaft fixedly connected to the fan blade, a vertical rod slidably connected to the sliding frame, and a scraper fixedly connected to the vertical rod. This utility model forms a circulating descaling mechanism by driving the scraper to reciprocate. This process utilizes the heat energy of the flue gas itself, requiring no additional energy, and can prevent the deposition and thickening of scale on the inner wall of the flue in real time. Through this active and high-frequency scraping action, it effectively avoids the formation of a heat insulation layer by scale, fundamentally reducing the increase in thermal resistance and ensuring efficient heat transfer between the flue gas and the heat exchange medium.

This application provides a retractable and flexible filter rod, a cigarette, and a method for preparing a cigarette. The retractable and flexible filter rod includes a filter rod body, which comprises an inlet section, a deformation section, and a tobacco section connected sequentially along the axial direction. The inlet section and the tobacco section are cellulose acetate bundles. The deformation section has a corrugated structure, and the interior of the corrugated structure forms a hollow cavity. The deformation section is used to perform retractable deformation at least along the axial direction of the filter rod body and to perform bending deformation along the radial direction of the filter rod body to adjust the smoke flow path. This application can flexibly adjust the smoke flow path inside the filter rod body, thereby adjusting the smoke temperature and the dryness of the smoke, and obtaining a good and personalized smoking experience.

The present application relates to the technical field of boiler monitoring and regulation, and particularly relates to an equal-smoke-velocity low-abrasion online monitoring and regulation method for a biomass boiler. The method comprises: obtaining a smoke velocity spatial dispersion diffusion index and a particle flow bias index; based on the smoke velocity spatial dispersion diffusion index and the particle flow bias index, screening an optimal induced draft fan control sequence from all to-be-analyzed control sequences; and based on the optimal induced draft fan control sequence, controlling the induced draft fan of the biomass boiler at a current monitoring time. The present application can make the boiler operation tend to a state of most uniform smoke flow field and most dispersed particle scouring by directly embedding the smoke velocity spatial dispersion diffusion index and the particle flow bias index into the regulation mechanism of the model prediction control framework, so as to inhibit the occurrence and development of local abrasion, and further improve the stability and reliability of long-term operation of the biomass boiler.

This utility model provides a wide-angle smoke detector, relating to the field of fire early warning technology. It includes a smoke detector with a mounting base on its top, and connecting components fixedly connected to the left and right sides of the bottom of the mounting base. In this utility model, when smoke enters the smoke detector, a V-shaped guide plate changes the direction of smoke flow. The V-shaped guide plate is located at the center of the bottom of the detector housing. Smoke entering from various directions impacts the V-shaped guide plate and is dispersed to both sides, allowing the smoke to be more evenly distributed within the detector's internal space. This increases the contact area and probability between the smoke and the detector body, ensuring that the smoke entering the detector is fully detected. This effectively solves the problem of insufficient contact between smoke and the sensor caused by the limited detection angle in traditional detectors, greatly improving detection sensitivity and enabling more timely detection of fire hazards.

The utility model provides a kind of split type cartridge and the electronic cigarette system of cooperation with the cartridge, the split type cartridge includes independent mouthpiece assembly and heating assembly, mouthpiece assembly includes tubular shell (1) and middle plug (3), and heating assembly includes that magnetic induction heating element (4) is connected together from inside to outside, electronic cigarette atomization material carrier (5) and heating body shell (2);Magnetic induction heating element (4) is at least partially hollow tubular, electronic cigarette atomization material carrier (5) is connected in magnetic induction heating element (4) outside, and electronic cigarette atomization material carrier (5) has inhaled electronic cigarette atomization material;The upper portion of the heating assembly is assembled in electronic cigarette atomization material storage heating integrated area (100), so that smoke flow channel (41), middle plug through-hole (31) and suction nozzle section (200) are communicated.The split type cartridge of the utility model has the characteristics of small size, simple structure and easy production and manufacture.

The application discloses a covering water mist dust removal spraying device, which comprises a flow guide cavity, unidirectional smoke flow can be formed in the vertically arranged flow guide cavity, a guide disc seat is arranged in the middle of the flow guide cavity, a gap for the smoke flow to pass through is formed between the circumferential surface of the guide disc seat and the inner wall of the flow guide cavity; a spraying main body is arranged on the guide disc seat, the spraying main body provides water mist to the gap, the water mist generated by the spraying main body covers the gap, and the smoke flow passing through the gap combines with the water mist to form wet heavy dust particles. The flowing space in the flow guide cavity is reduced and constrained by forming the gap for the smoke flow to pass through, so that the spraying main body in the flow guide cavity sprays water mist to the constrained smoke flow, the effective contact between the dust in the smoke flow and the water mist is improved, and full covering spraying is realized on the smoke flow flowing in the gap.

The utility model relates to a double heating surface dilution air warm air blower of coal-fired generating set denitration system, by cold dilution air main pipe, steam heating unit, wind / smoke heating unit, hot dilution air main pipe and three -way direction control valve constitute, steam heating unit includes cold dilution air pipe, hot dilution air pipe and heat exchanger, wind / smoke heating unit includes cold dilution air pipe, hot dilution air pipe, wind / smoke heat exchange pipe and wind / smoke flow space, and the import of wind / smoke heat exchange pipe is connected with cold dilution air pipe, and the export of wind / smoke heat exchange pipe is connected with hot dilution air pipe, and cold dilution air main pipe is connected through three -way direction control valve between two cold dilution air pipes. The utility model utilizes the high temperature wind / smoke with interference heat of coal-fired generating set to heat dilution air, to replace the auxiliary steam heating during the normal operation of unit, can greatly reduce the use amount of auxiliary steam, reduce production cost, and also has the positive role to environmental protection.