127results about "Draught induction" patented technology

The present invention relates to the field of gas water heaters, in particular to a smoke exhaust pipe. The smoke exhaust pipe comprises a pipe body, a mounting part is inserted into one end of the pipe body, a rainproof pipe is sealingly connected to the mounting part, and an outer end opening of the rainproof pipe is inclined downward. The smoke exhaust pipe provided by the present invention has the advantages of being convenient to mount and having a good rainproof effect.

The embodiment of the invention provides a pulverized coal boiler induced draft fan flow measurement method and system.The method comprises the steps that the combustion smoke amount, the air leakage amount of an air pre-heater and the air leakage amount of a boiler body are obtained firstly, and the combustion smoke amount is obtained through calculation of operation parameters of a coal mill and a boiler; the air leakage amount of the air pre-heater is calculated according to the oxygen content of inlet flue gas and the oxygen content of outlet flue gas of the air pre-heater; the boiler body air leakage amount is obtained through calculation according to a boiler air leakage rate function obtained by fitting boiler historical data. And the total smoke flow is calculated according to the combustion smoke amount, the air leakage amount of the air pre-heater and the air leakage amount of the boiler body. By acquiring the equipment parameters of the induced draft fan and calculating the flow proportion of the induced draft fan according to the equipment parameters of the induced draft fan, the flue gas flow of the induced draft fan is output according to the flow proportion. According to the method, the flue gas flow can be calculated by measuring relatively accurate quantity, and the measurement precision can be improved, so that the problem of low accuracy of a flow parameter measurement result of the induced draft fan is solved.

Methods and apparatus for improved efficiency and flue gas scrubbing in a fired heater using a condensing convection section. The method preheats a hydrocarbon or hydrocarbon / water process feed stream in a coil in the convection section of a fired heater, collects condensate from the flue gas, and scrubs the flue gas with the recirculated condensate. The apparatus has a heat transfer coil disposed in the convection section, to preheat a process stream and form condensate from the flue gas, and a condensate recirculation loop to collect the condensate from the convection section and scrub the flue gas with the condensate.

This utility model discloses a ventilation and anti-clogging device for a standby boiler dust collector, comprising: an inlet flue, an induced draft fan, a connecting assembly, and a limiting assembly. The induced draft fan is located at one end of the inlet flue. The connecting assembly includes a branch pipe located at the bottom of the inlet flue, with a first gate valve located in the middle of the branch pipe and a series pipe located at the bottom of the first gate valve. The limiting assembly is located at the output end of the induced draft fan and is used to restrict gas flow. The limiting assembly includes a first pipe located at the output end of the induced draft fan, with a second gate valve located at one end of the first pipe. Through the design of the branch pipe, the first gate valve, and the series pipe, this utility model allows the first gate valve to be opened during operation, enabling the induced draft fan of the adjacent operating boiler to draw away leaked flue gas and maintain a slight negative pressure inside the standby boiler. This eliminates the need to operate the standby boiler's induced draft fan, keeping the furnace and tail flue dry and thus avoiding wasted electricity.

An exhaust adaptor (2) to be attached to a front surface of an exterior case (1) of a combustion apparatus includes a duct (22) in which an exhaust passage (21) extending in an X-axis direction is defined, an inflow port (24) connected to an exhaust port (13) and communicating with the exhaust passage (21) is provided on a rear surface of the duct (22), and an outflow port (25) for discharging combustion exhaust gas flowing through the exhaust passage (21) to the outside is provided on one end surface of the duct (22) in the X-axis direction.SOLUTION: A dividing plate 27 for dividing the exhaust flow passage 21 in the longitudinal direction is provided in the duct 22. A plurality of first communication holes 271 for communicating the exhaust passage part 21r on the rear side of the division plate 27 with the exhaust passage part 21f on the front side are provided in the division plate 27 at intervals in the X-axis direction. A second communication hole 272 for communicating the rear side exhaust gas flow passage part 21r with the front side exhaust gas flow passage part 21f is provided in the dividing plate 27 in the vicinity of the inflow port 24.SELECTED DRAWING: Figure 2

The present invention discloses a boiler energy-saving shutdown system and method. The system includes a furnace A and a furnace B. The air inlet of the blower of furnace A has two channels, one of which is connected to the inlet flue of the flue gas purification facility of furnace B through the bypass flue of furnace B, and the other is connected to the atmosphere through the inlet air duct of the blower of furnace A; the air inlet of the blower of furnace B has two channels, one of which is connected to the inlet flue of the flue gas purification facility of furnace A through the bypass flue of furnace A, and the other is connected to the atmosphere through the inlet air duct of the blower of furnace B; when one of the boilers is shut down, the exhausted flue gas passes through the other boiler and is dust-removed by another normally operating boiler before being discharged to the outside, thereby solving the problem of substandard flue gas emissions after the boiler is shut down. After the boiler is shut down, the induced draft fan does not operate in the stall zone of the induced draft fan, so surge does not occur, safety is not endangered, and the service life is extended; the hot air entering the shut-down boiler is introduced into another normally operating boiler to participate in combustion, thereby realizing waste heat utilization.

To provide a flashback-proof gas burner adapted to be coupled to an aperture of a combustion chamber.SOLUTION: The gas burner is characterized by a specific configuration of a probe and its location for sensing the temperature. The probe has a fast response to changes in temperature, in particular when the flame is extinguished, allowing a fast response to close a valve for supplying gas to an inlet port, thereby preventing any explosion.SELECTED DRAWING: Figure 1

An exhaust plume control structure includes a mounting member configured to mount to an exhaust flow source. A diverter member is coupled to the mounting member to radially direct an initial exhaust flow exiting from the exhaust flow source radially outward. A plurality of peripherally spaced, radially extending vanes are coupled to the mounting member and radially outward of the diverter member to separate the radially outward directed initial exhaust flow into a plurality of additional exhaust flows. Each vane has a radially diverging cross-section. Each of the plurality of additional exhaust flows has a same radial exit velocity. The structure reduces exhaust flow velocity and may provide back pressure to the initial exhaust flow. The structure has a sound power level of less than 115 dBA. A power generating plant including the structure is also disclosed.

The utility model provides a mechanical smoke exhaust linkage system of a gas-fired boiler, and particularly relates to the technical field of mechanical smoke exhaust of gas-fired boilers. The linkage system comprises a control system, a gas-fired boiler, a flue gas heat removal tower and a chimney, the gas-fired boiler, the smoke heat removal tower and the chimney are connected through smoke exhaust pipelines; a smoke exhaust fan is arranged on the side, close to the gas-fired boiler, of the smoke heat extraction tower. An air duct is arranged on the smoke exhaust pipeline between the gas-fired boiler and the smoke exhaust fan; and an opening feedback valve and a laser range finder are arranged in the air duct. The opening degree feedback valve and the laser range finder are additionally arranged, the opening degree of the opening degree feedback valve is monitored through the laser range finder, so that the working frequency of the smoke exhaust fan is adjusted, feedback is sensitive, reliability is high, and leakproofness is good; the problem of unsmooth smoke exhaust caused by the transformation of the gas-fired boiler is effectively solved, and the energy-saving and consumption-reducing effects of the smoke exhaust system can also be realized.

The invention relates to a device for holding a flexible tubing 1 at the outlet of a flue allowing a secure and rapid installation without requiring intervention on the roof. The device comprises a foldable grapple 2 fixed to the end of the flexible tubing 1, incorporating a rain cap 6 and an anti-bird protection 5. During installation, the grapple 2 is inserted folded into the flue from below. Once the flexible tubing 1 is positioned at the chimney outlet, a sharp blow given by a chimney sweeping rod, or any other equivalent device, under the rain cap 6 allows the legs 4 of the grapple 2 to be unfolded. The flexible tubing 1 is then lowered until the grapple 2 rests on the cap 8 of the flue. Figure to be published with the abstract: Fig. 1

The invention discloses a natural gas combustion energy-saving furnace with downward exhaust type forced exhaust of exhaust gas, comprising a furnace jacket, a heat storage furnace is arranged inside the furnace jacket, the bottom of the heat storage furnace is fixedly connected to the combustion furnace, a lower gathering chamber is arranged at the bottom of the combustion furnace, the top of the furnace jacket is connected to an upper gathering chamber, the top of the lower gathering chamber is fixedly connected to a plurality of heat circulation pipes, and the upper gathering chamber and the lower gathering chamber are interconnected through the heat circulation pipe, a heat storage coil is fixedly arranged in the middle of the hollow groove, and an induced draft fan is arranged on one side of a heat collecting box. The invention provides an upper gathering chamber and a lower gathering chamber, and the two are interconnected through the heat circulation pipe, and the heat circulation pipe realizes the exchange of combustion heat in the furnace, and then circulates through the heat storage coil arranged at the bottom of the support seat, and is discharged below the furnace jacket by the induced draft fan and the heat exhaust pipe, thereby abandoning the traditional upward exhaust method of the combustion furnace, effectively avoiding the phenomenon of heating of the upper panel, and at the same time effectively reducing the heat loss, greatly improving the heat utilization rate, and saving energy and being environmentally friendly.

The utility model discloses an induced draft fan outlet baffle door which comprises a door plate, an open groove is formed in the door plate, a first sealing plate is movably connected in the open groove, symmetrical second sealing plates are movably connected in the open groove, the first sealing plate is movably connected to the second sealing plates, a rotating shaft is fixedly connected to the side face of the door plate, and the rotating shaft is fixedly connected to the side face of the door plate. A door handle is fixedly connected to the door plate, a third rotating groove is formed in the sealing batten, a first gear is fixedly connected to the other end of the first rotating rod, a second gear is correspondingly and fixedly connected to the other end of the second rotating rod, and the first gear and the second gear are sleeved with a movably-connected rotating belt. Through the structure, leakage points are effectively reduced, the sealing flexibility and adaptability are improved, the sealing efficiency is improved, the service life of the baffle door is prolonged, the maintenance cost is reduced, the structural stability is improved, and the operation convenience and efficiency are improved.

The invention provides a telescopic pulse soot blower capable of blowing soot at multiple angles and a soot blowing method of the telescopic pulse soot blower, and belongs to the technical field of boiler soot blowing. The rotary telescopic soot blower solves the problem that an existing rotary telescopic soot blower is prone to corrosion and abrasion due to the fact that chain transmission is prone to being affected by environments and media. The device comprises a fixed inner core pipe, an advancing device, a multi-point rotating mechanism, an outer spraying pipe, a combined propelling device, a base and a nozzle, the combined propelling device is installed at one end of the base, the fixed inner core pipe is arranged above the combined propelling device, the outer spraying pipe is connected to the outer side of the fixed inner core pipe in a sleeving mode, and the outer spraying pipe is connected with the advancing device. The advancing device is connected with the propelling device, a multi-point rotating mechanism is arranged on the outer side of the outer spraying pipe, the nozzle is connected with the outer spraying pipe, and a fuel gas mixer inlet is formed in the top of the fixed inner core pipe. The soot blower is mainly used for boiler soot blowing.

A breather pipe cap (1) comprises: a base (2); an attachment structure (3) depending from the base (2) for removably connecting the breather pipe cover (1) to a cooking appliance (10); and a frame (4) protruding from the base (2) to at least partially surround the vent tube (11). The base (2) comprises an opening (20) to receive a vent pipe (11) of the cooking appliance (10), and the attachment structure (3) surrounds the opening (20). The frame (4) comprises a discontinuity (41) for ensuring the air flow of the breather pipe (11).

The invention provides a compact self-mixing type flow guide air bellow device. The compact self-mixing type flow guide air bellow device comprises an upper flow guide air bellow and a lower flow guide air bellow which are fixed to the inner wall of a hot air pipeline and arranged at intervals. The upper flow guide air bellow and the lower flow guide air bellow are respectively positioned on an inner ring and an outer ring of the bending section and are concentrically arranged with the bending section; hot air channels are formed between the upper flow guide air bellow and the lower flow guide air bellow and between the upper flow guide air bellow and the inner side wall of the hot air pipeline and between the lower flow guide air bellow and the inner side wall of the hot air pipeline, so that the direction of hot air entering the hot air pipeline is changed and hot air is primarily shunted; an upper flow guide air box air inlet and a lower flow guide air box air inlet are formed in the positions, corresponding to the two side walls of the upper flow guide air box and the lower flow guide air box, of the hot air pipeline correspondingly and used for being communicated with the cold air pipeline so that cold air entering the hot air pipeline can flow to the horizontal section after being mixed with hot air. The integrated flow guide air bellow device with the functions of flow guide, resistance reduction and cold and hot air mixing is designed creatively from the source, space is saved, and air duct resistance is reduced.

The aim is to convert an old residential chimney flue into a sealed ventilation duct, in order to connect a mechanical ventilation system (MVHR). The idea is to connect a new residential ventilation network to an existing MVHR system by sealing the individual ducts, such as chimney flues.

The utility model relates to the technical field of smoke exhaust devices, in particular to an efficient smoke exhaust valve which comprises a shell, a dustproof baffle is arranged at a port, located on the smoke inlet side, of the shell, and the dustproof baffle is provided with a rolling device. A negative pressure fan is fixed in the shell; a movable plate is arranged at the end opening, located on the smoke outlet side, of the shell, a rotating shaft is fixed to the upper end of the movable plate, and an iron bar is fixed to the lower end of the movable plate; the rotating shaft is fixedly connected with the shell; and an electromagnet is fixed on the shell at the port and is adjacent to the rotating shaft. The dustproof baffle is adopted at the port of the smoke inlet side of the smoke exhaust valve to replace a traditional single baffle, and the problems that the smoke exhaust valve cannot be completely opened and the smoke exhaust effect is poor due to the fact that falling dust and greasy dirt are solidified are solved. By arranging the negative-pressure fan, the problem that smoke cannot be efficiently exhausted due to insufficient suction force depending on air flue suction force is solved. And by arranging an electromagnet and a movable plate, the problem that smoke flows backwards when multiple smoke exhaust valves exhaust smoke at the same time is solved.

A fuel-fired heating appliance has two fuel flow paths to a burner, each actuatable to a closed state and to an open state. A heat exchanger is in fluid communication with an area proximate the burner. A controller executes the steps: (a) while the first fuel flow path is closed, opening the second flow path; (b) following ignition of fuel flowing from the second flow path, opening the first fuel flow path; and (c) following step (b), closing the second fuel flow path while opening the first fuel flow path.

CHIMNEY ENCLOSURE The invention relates to an enclosure (110) for a chimney (100) comprising a stack (102) and a cap (104). The enclosure (110) has a side wall (110a) through which at least one window (116) passes, forming a flue open at both ends. The lower end forms a base (110b) fixed to the top of the stack (102), and the upper end forms a seat (110c) onto which a lower portion of the cap (104) is fixed. The base (110b) defines a lower opening (112a), and the seat (110c) defines an upper opening (112b). For each window (116), there is a hatch (114) removably fixed to the side wall (110a). Fig. 2

The invention relates to a wall chimney attachment for a heating device of a vehicle, in particular a caravan or motorhome. The wall chimney attachment comprises an attachment part, a cover part, an exhaust gas inlet opening, an exhaust gas outlet opening, and an exhaust duct formed between the attachment part and the cover part and extending longitudinally between the exhaust gas inlet opening and the exhaust gas outlet opening. The exhaust duct is curved longitudinally at least in sections and has differently oriented duct longitudinal directions, wherein a first duct longitudinal direction at the exhaust gas inlet opening points away from a mounting plane of the attachment part, wherein a second duct longitudinal direction between the exhaust gas inlet opening and the exhaust gas outlet opening points toward the mounting plane, and wherein a third duct longitudinal direction at the exhaust gas outlet opening points away from the mounting plane.

The present invention discloses a system and method for improving the induced draft fan (IDF) operating condition of a two-boiler, one-unit thermal power unit. The outlet of a first boiler is connected to one end of a first induced draft main pipe, the other end of which is connected to the input ends of the first and second induced draft fans. The outlet of a second boiler is connected to one end of a second induced draft main pipe, the other end of which is connected to the input ends of the third and fourth induced draft fans. One end of a connecting pipe is connected to the first induced draft main pipe, and the other end of the connecting pipe is connected to the second induced draft main pipe. An electric regulating valve is provided on the connecting pipe. A first pressure transmitter and a second pressure transmitter are respectively provided on the first and second boilers. A PID controller is respectively connected to the first and second pressure transmitters and the electric regulating valve. The present invention can effectively solve the induced draft fan (IDF) problem caused by a failure of only one boiler's induced draft fan in a two-boiler, one-unit unit.

The utility model discloses a straw bale direct combustion boiler combustion control system which comprises a fire grate, a boiler falling on the fire grate, a stock bin at the front end of the fire grate, a stock bin negative pressure meter detection port at the upper position of the stock bin, a feeding device connected with a stock bin port, a combustion cavity at the lower end of the stock bin, namely a main combustion area, and a bale breaking device at the upper position in the combustion cavity. A hearth temperature sensor is arranged at the position, close to the connecting arch, of the boiler, and a controller, a fire grate speed reducer, a burnout fan, a fire grate air blower, a heat exchange cylinder, a dust remover, an induced draft fan and a chimney are further arranged. The frequency of the feeding device, the frequency of the bag breaking device, the frequency of the air blowing and inducing fan and the frequency of the fire grate speed reducer can be controlled in a linkage mode according to the temperature condition of the hearth, and dynamic combustion is achieved; micro-negative pressure in the stock bin is realized by detecting the pressure in the stock bin, so that smoke return and fire return of a stock bin opening are avoided; through daily and powerful modes of the bag breaking device, the problems of non-uniform material falling and bag breaking efficiency of straws with different qualities are solved, and the practicability is higher.

A high efficiency heating apparatus for heating fluids and cooking mediums, such as oil or shortening within a fryer, includes one or more natural draft combustion chambers that are affixed to exterior surfaces of a fry tank.

An aircraft includes a fuselage and at least one primary wing having an upper surface, at least one recess in the upper surface and at least one conduit in fluid communication with the at least one recess. At least one ejector is disposed within the at least one recess and is configured to receive compressed air via the at least one conduit.

The present invention provides a chimney that allows for easy connection of multiple horizontal pipes and ensures high exhaust efficiency by suppressing the stagnation of exhaust gas G within the flue, while maintaining standardization of components and easily setting the cross-sectional area according to the exhaust volume. [Solution] The chimney consists of multiple cylindrical chimney units connected together, comprising a lower chimney unit 10 with a rectangular cross-section, an upper chimney unit 20 with an oval cross-section, and a shape-changing joint 30 connecting them. The lower chimney unit 10 improves the ease of installation of horizontal pipes 40, 40 by providing openings 12a, 12b in the flat chimney walls 11a, 11c, and prevents interference of exhaust gas G by an internal partition plate 13. The upper chimney unit 20 has a pair of arc-shaped sections (arc-shaped chimney walls 21a, 21b) and a pair of straight sections (flat chimney walls 22a, 22b), and by adjusting the width dimension W of the straight sections while keeping the radius of curvature of the arcs fixed, the cross-sectional area according to the exhaust volume is set while ensuring the commonality of parts.

The invention is a pre-insulated construction of the end of the duct of channeling installations in rooms and buildings, constituting a roof outlet - cowl that enables instalation - ventilation ducts to be provided through the roof plane and its protected. The invention is used as roof outlet on building roofs, especially in warehouses, industrial buildings, and utility buildings, to protect the ends of various types of installations so ducts such as ventilation, air conditioning, sanitary, and electrical ducts, which are provided inside the outlet, particularly from weather conditions.

To provide a heating device, preferably for the combustion of biomass products, in particular pellets made from biomass, with increased efficiency, a method for increasing the efficiency of the heating device and a corresponding use.SOLUTION: A heating device comprises: a burner part comprising a combustion chamber, a double-walled internal hollow combustion chamber wall 10 having an upper opening leading from above a combustion zone to the inside of the combustion chamber, a flue gas duct 22 for conducting flue gas downward along the combustion chamber, a heat exchanger area following the flue gas duct 22, the heat exchanger area comprising a flat tube flue gas heat exchanger 3 and a tertiary air heat exchanger 2, and a radiant heat exchanger 5 disposed above the combustion chamber; and a heating part comprising an air suction blower 23, an exhaust heat exchanger 7 having the same heat transfer medium as the flat tube flue gas heat exchanger 3, and an outlet opening 24 for heated air. The flat tube flue gas heat exchanger 3 forms a heat exchange circuit with the exhaust heat exchanger 7.SELECTED DRAWING: Figure 1

A termination assembly for a chimney is provided having an exhaust layer with an exhaust tube adapted to receive exhaust air from an appliance. An outlet opening of the exhaust tube terminates in the exhaust layer. An intake layer is separated from the exhaust layer. The intake layer has an enclosure defining a positive pressure area within the enclosure and a plurality of openings. Each of openings has a cross-sectional area that decreases from an exterior surface of the enclosure toward the positive pressure area within the enclosure. An intake tube is adapted to receive intake air at an inlet opening positioned in the positive pressure area. The positive pressure area in the intake layer has a pressure greater than the atmospheric pressure outside the termination and in the exhaust layer to prevent flow in the exhaust tube from being reversed.

The negative pressure combustion system comprises a combustion chamber, an air inlet cavity, an exhaust cavity and an exhaust fan, the air inlet cavity and the exhaust cavity are arranged at the lower end of the combustion chamber, the exhaust fan is communicated with the exhaust cavity, the air inlet cavity supplies oxygen for the first time from the lower end of the combustion chamber, and an exhaust pipe is arranged between the exhaust cavity and the upper end of the combustion chamber. The air inlet cavity is arranged in the combustion chamber and matched with an exhaust fan and an exhaust pipe to form a negative pressure airflow environment from top to bottom, smoke generated by combustion is exhausted in order, the air inlet pipe is arranged on the outer side of the air inlet cavity, supplies oxygen to the combustion chamber for the second time and is used for supplementing oxygen needed in the combustion process, and generation of incomplete combustion products is reduced.

The present invention provides a gas thermal desorption flue gas serial flow reinjection energy-saving device and a method for using the same, which relates to the technical field of contaminated soil remediation and pesticide site odor removal, and solves the technical problems of low energy utilization and limited energy-saving effect of existing gas thermal desorption remediation systems for contaminated soil. The gas thermal desorption flue gas serial flow reinjection energy-saving device includes a combustion system and a soil heating system; the combustion system includes a combustion chamber and a diverter device, the diverter device includes at least two airflow outlets arranged in parallel; the soil heating system includes a series pipe assembly and at least two groups of heating tube assemblies, the airflow inlet of each group of heating tube assemblies is respectively connected to the airflow outlet of the diverter device, and each airflow outlet of the diverter device is respectively provided with an on-off valve in front; at least two groups of heating tube assemblies can be connected through the series pipe assembly. The present invention is used to provide a gas thermal desorption flue gas serial flow reinjection energy-saving device with high heat utilization and low energy consumption and a method for using the same.