74results about How to "Reduce exhaust air volume" patented technology

The invention relates to a coal seam pre-splitting method based on gas extraction, which adopts a 'CO2 gas extraction device' as a tool to blast and pre-split a pre-mined coal seam, so as to increase the crack of the coal seam, drive out gas absorbed on the coal seam and extract the gas. The method particularly comprises the following steps: drilling a hole on the working surface of a pre-mined coal seam, filling CO2 gas extraction device into the drilled hole, sealing the drilled hole, detonating the CO2 gas extraction device, releasing high-pressure CO2 gas for deep-hole impact and pre-splitting of the coal seam, taking out the CO2 gas extraction device, and connecting the drilled hole with a gas extraction system to extract gas. The pre-splitting method of the invention can greatly enhance the permeability of the coal seam, promote the gas dissociation in the coal seam, and improve the underground gas extraction efficiency of the coal mine.

The invention discloses a control system of PH value in alkaline etching, relating to a control system of alkaline etching of a printed-circuit board and a control method. The invention aims to solve the problems that the PH value is difficult to control in the alkaline etching and the efficiency is low. The adopted technical scheme is as follows: the automatic control system of PH value in alkaline etching comprises an automatic control system, an etchant addition tank, a specific gravity controller, an ammonia chloride addition tank, and an ammonia water addition tank, wherein the automatic control system is used for controlling the operation of the whole system, the etchant addition tank is used for adding etchant into an etching section, the specific gravity controller is used for detecting and displaying the specific gravity of the solution in the etching section and transmitting the result to the automatic control system, the ammonia chloride addition tank is connected with the etching section and is used for adding the ammonia chloride solution in the etching section, and the ammonia water addition tank is connected with the etching section and is used for adding the ammonia water solution in the etching section. The invention is mainly used for alkaline etching link to adjust the PH value in the producing process of the printed-circuit board.

The invention relates to a hearth pressure control method of a vibrating grate boiler, which is an assistant adjusting method aiming at grate vibrating on the basis of an original hearth pressure control system, and can judge the hearth pressure change according to the influence of the grate vibrating on the flow of all the parts of an air and flue system, reduce grate air flow in due time and increase secondary air flow through advanced adjustment of all the executing mechanisms of the air and flue system, and provide guarantee for the safe combustion of the fuel while realizing the stable control of the hearth pressure. The method well solves the problems of raising, oscillating and the like of the hearth pressure along with the grate vibrating, improves the efficiency of the control system, improves the control effect, and is beneficial to the stabilization of the boiler burning state, and the improvement of the economical and safe operation level of the boiler.

A rotary deflector and a range hood using the same, the range hood includes a first fan, a second fan, a smoke collection hood and an oil screen, the oil screen and the rotary deflector are installed at the fume inlet of the smoke collection hood, and rotate The diversion device includes a casing composed of an upper annular cylinder and a lower annular cylinder connected to each other. A diversion cavity is provided inside the casing. The diversion cavity is provided with an air inlet and an air outlet, and the air inlet is located on the upper annular On the cylinder, the air outlet is located at the lower part of the lower annular cylinder, and there is a deflector between the inner wall and the outer wall of the lower annular cylinder to guide the airflow to the air outlet. The ring thickness d1 of the upper annular cylinder is 5mm‑30mm. The width d2 of the air outlet is 1 mm-10 mm, and the ratio d1/d2 of the thickness d1 of the upper annular cylinder to the width d2 of the air outlet of the lower annular cylinder is ≥3. The range hood can generate higher oil fume collection efficiency with a smaller exhaust air volume.

The invention provides a paper drying energy comprehensive utilization system for a steam and hot air combined supply boiler and relates to the field of paper making. The system comprises a hot air supply device, a steam supply device, a hot air utilization device and a steam utilization device. The hot air supply device is connected with the hot air utilization device through a hot air pipeline. The steam supply device is connected with the steam utilization device through a steam pipeline. The hot air supply device and the steam supply device are the same equipment. Steam generated by the steam and hot air combined supply boiler flows to the steam pipeline communicated with the steam utilization device. The steam and hot air combined supply boiler is adopted for generating steam used by the steam utilization device and generating high-temperature hot air used by the hot air utilization device. The steam and hot air combined supply boiler burns clean gas or fuel oil, so that the dust content of smoke is low. Hot air acquired after heat exchange is conveyed to a hot air utilization system. The temperature of the hot air generated by the steam and hot air combined supply boiler is not lower than 300 DEG C.

The present invention relates to an air-conditioner and its controlling method, especially three-stage operation for controlling two compressors, so as to improve application scope of refrigerating capacity and reduce power consumption. The present invention makes refrigerating capacity clear according to the operation method of compressor to opening air outlet separately. The present invention can prevent discharged air temperature from increasing by decreasing air discharge rate when decreasing refrigerating capacity caused by changing compressor operation method. In addition, the present invention changes the compressor operation method in order to increase and decrease refrigerating capacity to decrease air discharge rate, and open and close air outlet with a certain time difference, thus can decrease air discharged noise of air outlet. Therefore, the present invention provides an air-conditioner controlling method, the air-conditioner comprises at least a compressor capable of changing refrigerant capacity and multiple outlets and indoor fan, its controlling method is based on changeable refrigerant capacity to process multiple operation methods, in operation to judge whether inputting operation method transform information, if inputting operation method transform information, then decreasing the speed of the said indoor fan, and opening or closing stipulated beforehand at least a outlet according to operation method transformation.

The invention discloses a method and a device for preventing moisture condensation of a roof of a textile workshop. The method comprises the following steps of: using an exhausting and dehumidifying fan in winter: starting the exhausting and dehumidifying fan when the air humidity of the roof reaches the highest limit value of the given relative humidity through an exhausting and dehumidifying pipe net fixed at the lower surface of the roof of the textile workshop, and extracting the humid air around the lower surface of the roof. The device comprises the exhausting and dehumidifying pipe net at the lower surface of the roof of the textile workshop, a humidity sensor, the exhausting and dehumidifying fan and an anti-fogging automatic control circuit; the exhausting and dehumidifying pipe net consists of at least one exhausting and dehumidifying main pipe and a certain quantity of exhausting and dehumidifying branch pipes arranged by a certain regular way; the two sides of each exhausting and dehumidifying branch pipe are at least respectively provided with a row of exhausting and dehumidifying holes or seams arranged uniformly. The invention has good effect of preventing moisture condensation, low cost of application, simple structure and convenient use; and the operation fee is only 4% of the traditional method. The invention can save energy and reduce the power consumption, has good environmental-friendly performance and provides great economic benefits and social benefits in the textile industry.

The invention discloses an electrical control system and a control method suitable for a gravure printing machine drying system, including a touch screen, a programmable controller, a constant pressure control system for an exhaust pipe, a single-color drying control system for several groups of ovens, and a VOC detection control system, the single-color drying control system for each group of ovens is composed of a two-way communication control system for temperature control meters and a preset control system for electric dampers. The present invention also provides the above electric control system control method suitable for the drying system of the gravure printing machine. The invention is suitable for the drying system of the gravure printing machine, has a high level of equipment automation, simple and reliable operation, can improve the safe operation coefficient, greatly reduce energy consumption, reduce exhaust gas emissions, and provide good conditions for the subsequent thorough and low-cost solution to the VOC emission problem .

The present invention provides a range hood and stove all-in-one machine, which is a device for trapping and discharging oil fume and combustion exhaust during cooking, and aims to solve the disadvantages of an existing range hood, such as large power consumption, low smoke clearing efficiency and large recessive energy consumption. The range hood and stove all-in-one machine provided by the invention employs a scheme of separate collection and co-tube discharge of combustion exhaust and cooking fume. The machine comprises a stove, a shunt cover, a variable diameter stove ring or a lantern ring stove ring, a heat exchanger, a water tank and a range hood. Gas combusts in a closed chamber formed by the shunt cover, the stove ring and a pot to heat the pot; combustion gas flows upwards in a closed channel formed by the shunt cover, and heats the water in the water tank when passing through the heat exchanger in the exhaust channel of the shunt cover; the oil fume is trapped by the range hood in an open space; and the combustion exhaust and cooking fume converge at a position close to an exhaust fan inlet of the range hood, and enter into a same exhaust pipe for discharge. A rotatable fume collecting cover can be installed in the front position of the range hood.

The method for collecting usphalt smog in the course of vibration forming process of precalcined anode is characterized by that a jet gas flow with plane distribution is blown into the upper portion of vibration forming die bucket for precalcined anode, and a gas curtain is formed over the die bucket, a gas cuaking cover is placed on another side to suck and collect the gas flow. Said jet gas flow can be jetted out from a flat jet nozzle whose width is identical to that of forming die bucket, its gas flow speed is 5-10 m/s, and the jet gas flow is 0-10 deg. below horizontal level, its one side is used for sucking gas and another side is used for blowing gas so as to form gas curtain so as to remove harmful substances.

The invention relates to a control method, device and system for ventilation of an air conditioner in a breeding place and the air conditioner. The control method for ventilation of the air conditioner in the breeding place comprises the steps that the carbon dioxide concentration of the breeding place is obtained; a target ventilation volume of the breeding place is obtained; the system exhaust demand is determined according to the target ventilation volume of the breeding place; and an exhaust fan is controlled according to the system exhaust demand and the carbon dioxide concentration. According to the control method, device and system for ventilation of the air conditioner in the breeding place and the air conditioner, the system exhaust air rate can be determined according to the target ventilation volume so that the exhaust air rate can be reduced, and the air speed in the breeding place is reduced.

The invention relates to a safety control device for welders in special operating environments, which comprises a soot local discharge treatment device and a purification air feeding device. The purification air feeding device is arranged opposite to the direction of an exhaust port of the soot local discharge treatment device, the two devices are started simultaneously when the safety control device is used, the soot local discharge treatment device consists of a side draft hood, a primary filter, a secondary filter, an electronic purifier, an activated carbon absorber, a fan section, a control cabinet, a discharge pipe and the like, and the purification air feeding device comprises a sucking opening, a primary filter, a secondary filter, an electronic purifier, a fan section, a control cabinet, a hose and an air feeding hood. By the aid of the safety control device, soot and harmful gases, which are generated due to welding operation on the ground, in underground narrow spaces or tunnels can be effectively exhausted, treated soot meets the emission standard for occupational environments, non-toxic, dust-free, clean and hygienic air is supplied to a breathing zone of the welders, and the operating environments meeting health requirements are assuredly provided for the welders.

The invention provides a dust suppression device of a peanut pick-up harvester. The peanut pick-up harvester is provided with a vine collecting box, a riddling wind riddle and a fruit picking device,wherein an upward exhaust opening is formed in a top surface of the vine collecting box. The dust suppression device is composed of a fugitive dust recovering pipe and a wind leveling device, whereinone end of the fugitive dust recovering pipe is connected with the exhaust opening, and the other end of the fugitive dust recovering pipe is connected with the riddling wind riddle and/or fruit picking device through the wind leveling device; and the wind leveling device is provided with a tubular shell, a plurality of wind guiding pipes which are of concentric-circle distribution are fixed in the tubular shell, the smaller the diameter of each wind guiding pipe, the longer the length of each wind guiding pipe, end faces of the wind guiding pipes close to a wind inlet side are level, an annular step, which is abutted against the internal wall of the tubular shell, is arranged at the end face of the other end of each wind guiding pipe, and a wind outlet groove is divided into a plurality of air outlets by the annular steps. According to the dust suppression device of the peanut pick-up harvester, height of fugitive dust is lowered through changing an exhaust gas emission direction of the vine collecting box of the peanut pick-up harvester, meanwhile, an air exhaust volume of an air blower of the riddling wind riddle can be reduced, and probability of interaction between fruit picking spike teeth and peanut vines is increased.

The invention discloses a paint spraying system of an automobile steering pull rod and a paint spraying method. The system is used for carrying out paint spraying treatment on a main rod part of the automobile steering pull rod, the paint spraying system comprises a paint spraying mechanism, a feeding mechanism and a driving mechanism. According to the paint spraying system and the paint sprayingmethod, the automobile steering pull rod can be subjected to batch paint spraying treatment by the paint spraying system, so that the operation efficiency is greatly improved; a telescopic rod and a hook are adjusted so that the paint spraying device can be widely applied to paint spraying operation of automobile pull rods with different lengths or different circular hole forming directions, adaptability is strong; and waste gas generated in the paint spraying process can be recycled, the air quality in the working space is kept, meanwhile, due to the fact that a cover body is in a funnel shape, the actual exhaust volume of the cover body can be reduced to the maximum, and the waste gas treatment cost at the rear end is reduced.

The invention discloses a peanut harvester and a weed-throwing and dust-settling mechanism thereof. The peanut harvester comprises a picking platform, a bridge, a peanut picking mechanism, a choppingmechanism and a weed-throwing and dust-settling mechanism which are sequentially arranged from front to back along the direction of a vehicle body; a cleaning mechanism is arranged below the peanut picking mechanism; peanuts with stems are collected by the picking platform and then are conveyed to the peanut picking mechanism through the bridge; coarse stalks flow to the chopping mechanism to be chopped to form stalk residues; the weed-throwing and dust-settling mechanism comprises a weed-throwing fan and a weed box assembly provided with an air outlet; the weed-throwing fan is arranged at theintersection of the cleaning mechanism, the chopping mechanism and the weed box assembly, so that fine stalks of the cleaning mechanism sequentially pass through the inlet of the weed-throwing fan, afan impeller of the weed-throwing fan and the outlet of the weed-throwing fan to be thrown towards the weed box assembly, and stalk slag flows towards the outlet of the weed-throwing fan to be throwntowards the weed box assembly. The energy consumption of the weed-throwing fan is reduced, and the low-power weed-throwing fan is lower in manufacturing cost and easy to realize; and the air outlet speed is small, the dust amount is reduced, and the pollution of raised dust to a human body and the environment is relieved.

The invention provides an organic gas recovery modular assembly and a coating machine waste gas treatment system. The organic gas recovery modular assembly is characterized in that an organic gas concentration sensor is arranged on the exhaust pipeline, connected with a drying oven, of the organic gas recovery modular assembly, so that the air supply amount and the air exhaust amount of the drying oven can be dynamically adjusted according to the detected concentration of organic gas in a production device, on the premise that the concentration of the organic gas in the drying oven is maintained within an allowable concentration range required by the design process, the power consumption of operation of a fan is reduced as much as possible, the heating load required by an oven heater is reduced, energy is saved, and the operation cost of the system is reduced.

The invention discloses a continuous countercurrent catalytic oxidation device of the ventilation air gas of a coal mine. The device consists of a ceramic heat storage body, a circular channel, a heat insulation material, air inlet chambers, air exhaust chambers, air inlet pipes and air exhaust pipes, wherein the ceramic heat storage body is positioned in the center of the whole device; the air inlet chambers and the air exhaust chambers are respectively arranged at two ends of the ceramic heat storage body; the circular channel is uniformly arranged in the ceramic heat storage body along the length direction of the ceramic heat storage body; the air inlet chambers are positioned at two ends of the circular channel which is communicated with the air inlet chambers; the air inlet pipes which are arranged at two ends of the bottom of the circular channel are communicated with the air inlet chambers; the air exhaust chambers are positioned at two ends of the circular channel which is communicated with the air exhaust chambers; the air exhaust pipes which are arranged at two ends of the top of the circular channel are communicated with the air exhaust chambers; and the heat insulation material is coated on the outermost layer of the device. In the device, ventilation air enters from two ends alternately, the direction of an air flow is not required to be changed, pipelines, valves and control elements for controlling the reverse direction of the air flow are eliminated, and the whole device is simple in structure and stable in operation.

The invention relates to a dampness removing and fresh air integrated machine system for breeding sheds in a cold region, and belongs to animal husbandry raising facilities. The dampness removing andfresh air integrated machine system is formed by the assembling of an outdoor self-cooling tank (1), an integrated machine housing (2), a thermal compensation device (3), a wind inlet fan (4), a surface cold dampness removing device (6), a fresh air discharging pipe (8), a connecting hose (10), a wind amount automatic regulation plate (11) and a circulation pump (13). The dampness removing and fresh air integrated machine system disclosed by the invention is especially adapted for breeding sheds in the cold region in north in winter, so that the humidity in the sheds is reduced, the entry of fresh air is increased, the wind exhaust capacity outside the shed is reduced, the heating cost is reduced, and the control of the humidity in the shed of pig sheds in cold region in north in winter isrealized. The dampness removing and fresh air integrated machine system disclosed by the invention has the characteristics of being novel, scientific and reasonable in structure, high in degree of automation and high in applicability.

The invention discloses an energy-saving cooking range capable of saving energy at a frying interval. The energy-saving cooking range comprises a pot body; carrying rods are fixedly connected with thebottom of the pot body; carrying pipes are in sliding fit with the side faces of the carrying rods; a stove body is fixedly connected with the bottoms of the carrying pipes; a blast pipe is arrangedon the side face of the stove body in a penetrating and inserting manner; an extruding rod is arranged on the side face of the blast pipe in a penetrating and inserting manner; a transitional spring is fixedly connected with the bottom of a transitional rod; a wind shield is fixedly connected with the bottom of the transitional spring; a clamping rod is in sliding fit with the side, close to the blast pipe, of the wind shield; a fixed block is in sliding fit with the side face of the clamping rod; an air receiving rod is fixedly connected between the carrying rods and with the bottom of the pot body; and a pressure sensing switch is arranged at the bottom of the air receiving rod. Through cooperative application of the carrying rods and the transitional rod, the energy-saving cooking rangecan realize the effect of adjusting the coal combustion rate at a frying interval to further change the stove body output temperature.

The invention discloses an intelligent and environmentally friendly integrated cooking stove integrating oil smoke separation and smoke guide energy concentration. The cooking stove comprises a closedcombustion stove body, a central control panel, an oil smoke separation system, a smoke guiding system, a combustion system, an exhaust gas discharge system, a water supply system, a sewage drain system and a dishwasher, the central control panel is located directly in front of the stove body, the dishwasher is arranged at the lower front portion of the stove body, the oil smoke separation systemis arranged at the upper rear portion of the stove body, inlets of the smoke guiding system and the exhaust gas discharge system are connected with the combustion chamber of the stove body, the watersupply system provides hot water for the oil smoke separation system and the dishwasher through the combustion system, and the sewage drain system is located at the lower portion of the oil smoke separation system. The stove adopts the method of water mists to strip and discharge oil stains in lampblack generated during cooking into sewage, the oil smoke free external discharge is achieved, a part of the waste hot gas generated during the combustion of the gas is used as the power for guiding the oil smoke, the closed combustion stove body not only gathers fire and saves energy, but also reduces the exhaust air volume and energy consumption of an exhaust fan, and the oil smoke is stopped from being affected by a rising hot air flow.

The invention discloses a variable-air-volume control system. The variable-air-volume control system comprises a box body, an air filling fan, an air exhausting fan, an electric control box, an air speed sensor and an air speed induction instrument and frequency converters, wherein the box body is arranged on the horizontal plane; the box body comprises a workbench and front vertical pillars; a push-pull door is arranged on one side of the box body and is connected with the box body in a sliding manner; an air outlet connected with the air exhausting fan is formed in the upper end of the box body; an air filling tube connected with the air filling fan is arranged; the front vertical pillars are arranged on two sides of the push-pull door; the front vertical pillars are provided with first air filling holes connected with the air filling tube; the air speed induction instrument is arranged at the middle and is arranged at the lower end of the air outlet; a signal wire of the air speed induction instrument is connected with the electric control box; two frequency converters are arranged; one frequency converter is connected with the air exhausting fan; the other frequency converter is connected with the air filling fan. The variable-air-volume control system can automatically adjust the air filling volume according to the air exhausting volume; the indoor air is not excessively exhausted; the constant room temperature can be maintained; the variable-air-volume control system is safe, reliable, energy-saving and environmentally-friendly.

The invention relates to the technical field of organic matter treatment equipment, and discloses an organic solid waste drying device. The organic solid waste drying device comprises a base; a frameis fixedly mounted at the top of the base; an equipment table is fixedly mounted at the top of the frame; a crusher is fixedly mounted at the top of the equipment table; the bottom end of the crusherpartially penetrates through the equipment table and extends under the equipment table; a crushing outlet is formed in the bottom end of the crusher; the top of the crusher is opened, and is fixedly connected with a feed hopper; and a driving motor is fixedly mounted at the top of the equipment table, and is positioned on the right side of the crusher. The organic solid waste drying device is provided with the crusher and a dryer for treating organic solid waste PET plastic bottles, crushes the PET plastic bottles through the crusher, and conveniently dries broken plastic; and through design of the dryer, the broken plastic can be fully and effectively dried to accelerate the drying effect and the drying efficiency.

The invention discloses an S-shaped runner eddy washing spraying chamber. The S-shaped runner eddy washing spraying chamber comprises a conveying rail, a first spraying gun, a second spraying gun, an S-shaped runner eddy washing device, a workpiece inlet, a workpiece outlet, a water curtain layer, a first air exhaust port and a second air exhaust port. Maintenance and material changing are more convenient according to the two spraying guns which independently work, and the two spraying guns are filled with different coating so that the device can meet the using requirements of diversified spraying techniques; meanwhile, the first air exhaust port and the second air exhaust port are formed in the gathering position of painting mist, and balanced and orderly flow of airflows in the spraying chamber is ensured while the exhaust air rate is reduced; and the working finished product rate is improved, and the cleaning rate can be improved by the S-shaped runner eddy washing device.