96results about "Draught induction" patented technology

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.

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 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 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.

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.

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

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.

The present invention relates to a flashback-proof gas burner adapted to be coupled to an aperture of a combustion chamber. 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 the inlet port, thereby preventing any explosion.

The utility model discloses a kind of boiler induced draft equipment, including induced draft fan, air inlet pipe and air outlet pipe are equipped on the induced draft fan, the mouth of air inlet pipe is equipped with filter screen, dust collection head movable along XY axis is equipped above the filter screen, bristle is ringed and equipped at the bottom edge of dust collection head, the bottom of dust collection head is air inlet end and bristle contacts filter screen top surface, the top of dust collection head is equipped with the connecting pipe connected with external suction equipment. The utility model has the characteristics of automatically cleaning dust accumulated on filter screen, avoiding filter screen blockage induced draft fan air inlet pipe, improving air inlet efficiency, making boiler combustion more sufficient, to further improve the combustion efficiency of boiler etc.

A roof vent capping device that is configured to sealably secured to an opening of a roof vent pipe so as to facilitate a pressure test of a plumbing network. The present invention is configured to be removed from the roof vent pipe from a distal location ensuing the pressure test. The roof vent capping device includes a cap member wherein the cap member has an upper portion and a lower portion. The lower portion has a diameter configured to be inserted into the opening of a roof vent pipe and provide a hermetic seal. A securing member is superposed over the cap member and includes end members that are configured to releasably secure to the roof vent pipe. A pull member is operably coupled to the securing member and the cap member and includes a second end distally located from the roof vent pipe.

The present application relates to tail flue gas monitoring technical field, especially for gas power plant tail flue gas monitoring, processing system and method, including welding pipe welded on the heating surface pipeline, welding pipe is in the upstream direction of heating surface pipeline, the temperature of upstream direction of heating surface pipeline is lowest, the intermediate position of welding pipe is fixedly connected with the barrel, the barrel includes the inclined part and horizontal part connected head to tail, the fixedly connected fan-shaped part between the side of inclined part close to welding pipe and welding pipe, spiral blade works, can make the flow rate in welding pipe greater than the rest of heating surface pipeline, thereby making welding pipe and the rest of heating surface pipeline produce temperature difference, when adjusting the exhaust gas temperature downward, or the temperature of acid dew point drops, with welding pipe as the representative to detect acid dew point, welding pipe as the vanguard of the rest of heating surface, when the condensate water appears on the surface of welding pipe, timely adjust the exhaust gas temperature, thereby avoiding the condensation of acid water in a large range of heating surface pipeline.

The invention discloses a gas furnace control method and system suitable for a multi-load working condition, and the method comprises the steps: collecting the real-time concentration of flue gas generated in the operation process of a gas furnace body, and determining the real-time operation load of the gas furnace body in combination with the opening degree of a gas valve; establishing a load-optimal target concentration curve, and matching the optimal target concentration corresponding to the real-time operation load according to the load-optimal target concentration curve; and dynamically adjusting the rotating speed of the smoke exhaust fan according to a comparison result of the real-time concentration and the optimal target concentration. The problem that in an existing gas furnace control scheme, a smoke exhaust fan rotating speed control mode based on a single threshold value can only adapt to a single gas furnace load working condition point and is difficult to cope with parameter dynamic changes caused by gas furnace load complex fluctuation is solved.

A system comprises an exhaust gas ejector 1 and an induced draft fan 2 installed within an exhaust gas duct of an industrial combustion process 3. A system integrated into the combustion process redirects high-pressure motive steam to the ejector on detection of a failure of the induced draft fan, creating a suction effect which draws exhaust gases through a venturi passage of the ejector to maintain a negative pressure during a shutdown of the process. The exhaust gas ejector may be in series with the induced draft fan, or they may be in parallel with a changeover damper system 6 switching a flow path between the exhaust gas ejector and the induced draft fan. The combustion process may comprise pyrolysis, gasification, or a solid fuel combustion process. Corresponding methods are also claimed.

A catalytic burner (10) for a hydrogen-fuelled boiler (100) comprising at least one inlet port (11, 11', 11"), an outlet port (12), at least one fan (40) for inlet of air and a catalytic section (30), comprising at least one self-priming catalyst (31), wherein said fan (40) is successively disposed downstream of said at least one inlet port (11, 11', 11") of air and hydrogen, and wherein said fan (40) is configured to simultaneously draw, mix and feed air and hydrogen to said catalytic section (30) of said catalytic burner (10). The invention is also directed to a hydrogen boiler plant (100) comprising said catalytic burner (10).