472results about "Chimneys" patented technology

The invention discloses an air preheating biomass boiler, belongs to the technical field of boilers, and aims to solve the problems of low combustion efficiency, insufficient flue gas waste heat utilization and particulate matter emission of a traditional biomass boiler. Function optimization is achieved through a main body structure composed of a furnace body, a charging barrel and a rotating pipe, a double-spiral-disc heat exchange assembly is arranged in the charging barrel, biomass fuel is preheated through boiler exhaust smoke waste heat, meanwhile, smoke is discharged through exhaust holes after being distributed through spiral disc gas storage cavities, and unburned particles are filtered by a biomass layer and carried to a hearth to be subjected to secondary combustion; an air inlet cavity is formed in the rotating pipe, and air is preheated through the fixed pipe and the first connecting pipe and then input into the hearth. The exhaust assembly adopts a sliding rod and sealing block matched structure, and a convex block mechanism driven by a rotating pipe drives the sealing block to periodically move, so that gas in the charging barrel is intermittently exhausted through a double-layer filter screen. According to the boiler, the heat efficiency is improved through a smoke-air two-way preheating and particulate matter secondary combustion mechanism, and the biomass preheating, air heating and emission treatment process is optimized.

A non-return valve for a flow channel has a housing and an outflow opening that can be closed by a pivoting blocking flap. The blocking flap has a dome-shaped bulge. An opening edge of the outflow opening has a hinge region for the blocking flap that transitions into a blocking flap stop region circumferentially opposite the hinge region. The blocking flap stop region is offset so that the opening edge has a progression that is curved in the circumferential direction and in the outflow direction. The housing has an indentation in the circumferential direction, which is not closed by the blocking flap such that the indentation forms a condensate chamber when the housing is inserted into the surrounding flow channel. The indentation is equipped with a flow opening, through which a condensate accumulating in the condensate chamber delimited by the indentation can flow in the interior of the housing.

The utility model provides an exhaust fume collecting hood and gas water heating equipment comprising the exhaust fume collecting hood. The smoke collecting hood comprises a hood shell used for collecting smoke, a smoke exhaust pipe extending upwards from the hood shell, and a baffle assembly fixedly contained in the smoke exhaust pipe. The baffle assembly comprises a support fixedly installed in the smoke exhaust pipe, a rotating shaft arranged on the support and a pair of baffles which are arranged on the rotating shaft in a pivoted mode and can be opened and closed. The support is further provided with a limiting piece which extends upwards and abuts against the pair of baffles when the pair of baffles are clamped so as to limit the minimum clamping angle between the pair of baffles. By arranging the limiting piece, the baffle cannot cross the rotating shaft to be overlapped with the baffle on the other side after being blown up, and therefore the baffle can smoothly fall back to the original closing position.

The invention relates to the field of waste incineration, in particular to an environment-friendly incinerator for waste treatment, and solves the problems of insufficient combustion, heat loss and low residue cleaning efficiency of a traditional device. The device comprises a main cylinder, a contraction unit, an incineration unit, an iris opening and closing mechanism, a conical cylinder, an incineration assembly and a transmission assembly. The upper end and the lower end of the main barrel are communicated, the contraction unit drives a strip-shaped plate to vertically accumulate garbage, the incineration unit can move up and down and spits fire through an electric control nozzle, internal and external oxygen supply is achieved through the incineration assembly and the conveying assembly, heat loss is reduced through an iris opening and closing mechanism, and the conical barrel is matched with the collecting barrel to automatically collect residues. The structure is optimized, the incineration efficiency is improved, harmful residues and energy consumption are reduced, the treatment continuity is guaranteed, and the device is suitable for reduction and innocent treatment of domestic and industrial waste.

The biomass particle hot blast stove comprises a stove body, a feeding assembly, a combustion assembly, a heat exchange assembly and a smoke exhaust assembly. The combustion assembly is arranged in the furnace body, a combustion chamber of the combustion assembly is sequentially divided into a drying pyrolysis area, a main combustion area and a burnout area in the conveying direction of biomass particles, and ordered partitioned combustion of preheating, sufficient combustion and complete burnout of fuel is achieved; the heat exchange assembly comprises a first heat exchange set arranged above the combustion assembly and a second heat exchange set arranged in the circumferential direction of the combustion assembly, and a three-dimensional and multi-layer waste heat recovery structure is formed. The combustion efficiency and the burn-off rate of the biomass particles are obviously improved; through the first heat exchange set and the second heat exchange set, efficient and sufficient recovery of combustion waste heat is achieved, and the overall heat efficiency and the energy utilization rate of the hot blast stove are greatly improved.

The utility model provides a novel steel chimney windproof structure, and relates to the technical field of boiler appliances. An upper drainage cover is connected to the top of the outer side of the windproof cover body in a welded mode. The outer side of the windproof cover main body is also connected with a lower drainage cover in a welding manner; ten outer shielding plates are welded to the outer wall of the windshield body in an annular arrangement mode. Ten inner shielding plates are welded on the inner wall of the windproof cover main body in the same annular arrangement manner; a water collecting groove is further welded to the inner wall of the windproof cover body. According to the windproof structure, rainwater can be prevented from entering the steel chimney in rainy days, adverse effects on the internal temperature of the boiler are avoided, meanwhile, the inner wall of the steel chimney can be prevented from being corroded, and the service life is prolonged.

The invention discloses a flue gas flow equalizing device for a turning flue of a compact boiler, and relates to the technical field of flue gas flow equalizing devices. The device comprises a flow guide plate arranged at an inlet of a turning flue and used for preliminary flow guide; the different-diameter flow equalizing pore plate is arranged at the downstream of the flow guide plate, and the flue gas flow speed is balanced through the differentiated design that small holes are formed in the high flow speed position and large holes are formed in the low flow speed position; and the rectifying grid is arranged at the downstream of the reducing flow equalizing pore plate so as to further optimize the uniformity of the flow field. Through a three-stage flow equalizing system formed by the guide plates, the different-diameter flow equalizing pore plates and the rectifying grids, the problem that the flue gas flow velocity at the turning flue of the compact boiler is not uniform is solved, and while the denitration efficiency is improved, the device has the advantages of being simple in structure, low in manufacturing cost, small in occupied space and the like.

The utility model discloses a boiler smoke exhaust pipe, belongs to the technical field of boiler accessories, and provides a boiler smoke exhaust pipe capable of effectively preventing airflow from flowing backwards. The boiler smoke exhaust pipe comprises an inner pipe body and an outer pipe body, the upper end of the inner pipe body is a first horizontal section, and the lower end of the outer pipe body is a second horizontal section; the end of the second horizontal section and the end of the first horizontal section are fixed through a connecting piece, a receding groove is formed in the first horizontal section, the first horizontal section is provided with a one-way opening door in the receding groove, the one-way opening door comprises a configuration ring clamped in the receding groove, and the inner diameter of the configuration ring is larger than that of the first horizontal section. The inner diameter of the configuration ring is smaller than or equal to that of the second horizontal section, and the configuration ring is rotationally connected with two half-moon plates through two parallel limiting shafts on the inner wall. The smoke exhaust pipe is divided into the two sections, each section is provided with the horizontal part, the one-way opening door structure is arranged between the end faces of the horizontal parts, normal smoke exhaust can be achieved, rainwater can be effectively prevented from flowing backwards, and therefore the safety of the boiler is improved.

The utility model relates to the technical field of household appliances, in particular to a combustion device and a gas water heater, and the combustion device comprises a combustor used for forming flames and provided with a combustion port for spraying the flames outwards; the smoke guide shell is internally provided with a smoke guide channel which is communicated with the combustion port and is used for exhausting smoke generated by combustion upwards, and an opening in the lower end of the smoke guide channel is connected with the combustion port, so that a combustion area for flame combustion is formed in the smoke guide channel; a heat resistance structure is formed in the side wall of the smoke guide channel, and comprises a heat resistance cavity formed in the side wall of the smoke guide channel; the air outlet hole channel is used for communicating the heat resistance cavity with the smoke guide channel; the lower end area of the heat resisting cavity is communicated with the outer space of the smoke guiding shell through the air inlet hole channel. The combustion device can prevent heat from being dissipated outwards through a simple structure, so that the combustion device has higher economical efficiency; the utility model further discloses the gas water heater with the combustion device.

The utility model relates to the technical field of wall-hanging stoves, in particular to a wall-hanging stove which comprises a shell, an air inlet connector and a smoke exhaust connector are arranged on a top plate of the shell, a water collecting disc is arranged in the shell and opposite to the air inlet connector, and the water collecting disc is used for collecting water flowing into the shell from the air inlet connector. The water collecting tray comprises a drainage part, and water drained from the drainage part flows to the inner wall of the surrounding plate of the shell and flows downwards along the surrounding plate. According to the wall-hanging stove, water in the water collecting tray is discharged along the surrounding plate of the shell through the water discharging part of the water collecting tray, a water discharging pipe does not need to be arranged, the structure is simple, and installation is convenient.

The utility model provides a thermal insulation layer pressurized anti-corrosion chimney, which relates to the technical field of anti-corrosion chimneys and comprises a chimney body, a chimney cap and a chassis, the chimney cap is arranged at the top of the chimney body, the chassis is fixedly connected to the bottom end of the chimney body, an air inlet is arranged on one side of the bottom end of the chimney body, and an air outlet is arranged on the other side of the chimney body. An air supply mechanism is arranged on one side of the air inlet, a noise elimination mechanism is arranged between the air supply mechanism and the air inlet, and the chimney body comprises an outer cylinder, a heat insulation layer and a lining; the fan is communicated with the connecting cover through the ventilation pipe, the connecting cover is installed at one end of the fixing sleeve, the fan conveys air pressure into the fixing sleeve through the ventilation pipe, and the silencing cylinder is clamped into the fixing sleeve through the clamping ring. The sound waves can excite air molecules in countless small holes in the silencing cylinder and the sound absorption sleeve to vibrate, and part of sound energy is consumed to overcome friction force and viscous force, so that silencing is achieved, and noise generated by conveying air pressure is reduced.

The utility model discloses a novel biomass combustion furnace chimney device, which relates to the technical field of combustion furnaces, and comprises a furnace body, the top of the furnace body is provided with a radiator for carrying out heat exchange on combustion flue gas, one side of the radiator is communicated with an air outlet pipe, the top of the air outlet pipe is provided with a chimney body, and the chimney body is communicated with the radiator. The chimney has the advantages that the inclined pipe is beneficial to stabilizing the airflow in the chimney, if a straight-barrel-shaped chimney is adopted, the situation that the pulling force of the chimney is not enough can be generated in the high-speed working process of a fan, the airflow in the chimney needs to be supplemented through the inclined pipe, and therefore the chimney is not prone to being damaged. Otherwise, the overall length of the chimney needs to be increased, the cost is increased, the air outlet space of the connecting pipe is blocked through movement of the baffle, and therefore the effect of adjusting the air quantity entering the chimney body is achieved, and the air speed is adjusted according to the feeding and combustion conditions in the hearth.

The application discloses a chimney tuned mass damper. The chimney tuned mass damper comprises a mounting main plate, four adjusting structures are fixedly installed on the top of the mounting main plate, and the four adjusting structures comprise first damping pipes. In the application, when different intensity impacts are coped with, the rotating rod drives the gear to rotate by rotating the rotating valve, the telescopic rod moves up and down in the first damping pipe because the gear and the teeth of the telescopic rod are engaged, the length of the air column in the first damping pipe is changed because the sealing gasket is sealed with the first damping pipe when the telescopic rod moves in the first damping pipe, the damping force generated when the first spring drives the damping rod to compress is changed, different intensity impacts can be coped with, the damping intensity can be adjusted according to different impact intensities, and thus the purpose of adjusting the damping intensity according to different impact intensities is achieved.

The utility model discloses a novel chimney anti-corrosion structure, relates to the technical field of anti-corrosion structures, and comprises an anti-corrosion plate, a sealing plate and a rubber buffer cushion layer, the sealing plate is located on the outer wall of the anti-corrosion plate, the outer wall of the sealing plate is provided with an insertion column, the outer wall of the anti-corrosion plate is provided with an insertion groove, the top of the anti-corrosion plate is provided with a channel, and the rubber buffer cushion layer is arranged in the channel. Splicing screw rods are arranged on the inner walls of the channels, splicing screw grooves are formed in the outer walls of the inserting columns, rubber layers are arranged on the outer walls of the anti-corrosion plates, and rubber buffer cushion layers are arranged on the outer walls of the rubber layers. According to the anti-corrosion device, the protection mechanism is installed, firstly, the rubber buffer cushion layer is installed on the outer wall of the anti-corrosion plate through the rubber layer, then the sealing plate is moved to the two sides of the anti-corrosion plate, and the sealing plate is installed, so that when the anti-corrosion plate provided with the sealing plate is moved to the interior of the chimney, the anti-corrosion plate is prevented from falling off through the elastic characteristic of the sealing plate; and the rubber buffer cushion layer can buffer thermal expansion and cold contraction stress, and the situation that the anti-corrosion plate is damaged is avoided.

The flow equalizing device comprises a machine body, a smoke collecting groove is formed in the bottom of the machine body, a flow dividing mechanism is arranged in the machine body, a flow dividing pipe is connected to the side edge of a main flow pipe, flow guide blades are arranged in the main flow pipe, a flow dividing circular ring set is arranged above a flow equalizing cover, and the flow dividing circular ring set is connected with the flow equalizing cover. The upper circular ring is connected with the lower circular ring through a first rotating shaft, and a purifying device is arranged above the flow dividing circular ring set. By arranging the flow dividing mechanism in the machine body, when the smoke amount is small, smoke uniformly passes through the flow equalizing holes only through the main flow pipe, the upper circular ring rotates to enable the outer ring holes to be staggered, and the smoke uniformly enters the purification device only through the upper inner ring holes and the lower inner ring holes; when the amount of smoke is large, the smoke enters the main flow pipe and bursts through the magnetic suction door curtain to enter the flow dividing pipe, the flow dividing circular ring set is arranged above the flow dividing mechanism, the smoke is further divided, and it is ensured that the smoke enters the purification device in a uniform, slow and reduced mode.

The invention provides an ash deposition prevention heat exchange system and method capable of adjusting a flue gas through-flow section, belongs to the technical field of flue gas treatment of coal-fired units, and can at least partially solve the problems that an existing baffle door is complex in structure, prone to jamming and air leakage, high in maintenance cost and prone to causing uneven airflow and local ash deposition; a traditional soot blower is high in energy consumption and limited in effect, and possibly causes tube bundle abrasion. In order to solve the problems that a heat exchanger with a fixed section cannot dynamically adjust the through-flow section and the flow velocity is insufficient during low load, the heat exchanger comprises a flue, the flue is provided with a section air bag assembly, a heat exchange assembly, an air path control module and a DCS control module, and by arranging the section air bag assembly capable of controlling expansion in the flue and combining a partition heat exchange structure and DCS closed-loop control, the heat exchange efficiency is improved, and the heat exchange efficiency is improved. Dynamic adjustment of the flue gas through-flow section is achieved, the flue gas flow speed under the low-load working condition is effectively increased, fly ash deposition is restrained, and ash deposition and performance degradation of a heat exchange assembly are slowed down.

The utility model provides a chimney damping device, which belongs to the technical field of chimney damping, and comprises a mounting assembly and an adjusting assembly, the mounting assembly comprises a mounting track annularly arranged on the periphery of a chimney and a mounting seat slidably connected to the mounting track, and the mounting track is connected to the chimney; the adjusting assembly comprises a fixing rod connected to the mounting base and a balance weight mechanism connected to the fixing rod, the fixing rod extends in the radial direction of the mounting rail, and the balance weight mechanism is located at the end, away from the mounting base, of the fixing rod. The balance weight mechanism comprises a balance weight block connected to the fixing rod in a sliding mode and two elastic pieces connected to the balance weight block, and the two elastic pieces are arranged on the two sides of the balance weight block respectively along the extending path of the fixing rod. The utility model provides a chimney damping device which aims at solving the problem that when an existing tuned mass damper faces nonlinear vibration, the damping effect of the damper is poor.

A gas conditioning system removes contaminants including nitrogen oxides and sulfur oxides from flue gas of a marine vessel, and includes an oxidizer unit and a direct contact cooler. The oxidizer unit receives an exhaust flue gas from a marine engine through a fluid inlet at a temperature between 150 degrees Celsius and 550 degrees Celsius, and converts at least a portion of the nitrogen oxides in the flue gas into nitrogen gas, nitrogen dioxide, or both. The direct contact cooler is fluidly connected to the oxidizer unit, and includes a housing defining a cooling chamber. The direct contact cooler directs the flue gas into contact with seawater residing in the cooling chamber and cools the flue gas to a temperature less than or equal to 60 degrees Celsius. The seawater removes some or all nitrogen dioxide and sulfur dioxide from the flue gas in the cooling chamber.

The invention discloses a whole-process SCR denitration system, and relates to the technical field of coal-fired power plant boiler denitration systems. The system comprises a boiler and an SCR denitration reactor, the boiler and the SCR denitration reactor are connected through a flue, a boiler hearth is composed of a water cooling wall, the system further comprises a whole-process SCR denitration bypass system, and the whole-process SCR denitration bypass system comprises a bypass pipeline, a bypass ash discharging system and a bypass adjusting system; the bypass pipeline comprises a flue gas bypass interface, a denitration flue gas bypass branch pipe, a denitration flue gas bypass mother pipe and a denitration flue gas injection branch pipe; the bypass adjusting system comprises a turn-off baffle and an adjusting baffle. The whole-process investment of the SCR denitration system from boiler ignition to BMCR load can be realized, the investment time of the denitration system is shortened, the problem of flue gas nitrogen oxide pollutant emission during the period from boiler ignition to unit grid connection is solved, the nitrogen oxide emission is reduced, the pollutant emission level of a power plant is improved, and certain social and environmental benefits are achieved.

To provide a water heating apparatus capable of effectively cooling a predetermined motor by a simple structure, without using a large-sized special member.SOLUTION: A water heating apparatus WH is equipped with a water heating apparatus body portion A that has a combustion device 8, a fan 1 and a motor M for driving the fan, and an air supply adaptor 4 attached to an upper wall portion 31 of an exterior case 3. The combustion device 8 and the motor M are located in an area near an upper part in the exterior case 3, and in plan view, the combustion device 8 is at least partially located between the air supply adaptor 4 and the fan 1. An air outflow port 42 of the air supply adaptor 4 opens in a generally horizontal direction while avoiding a direction facing the motor M, and air flowing out from the outflow port 42 advances while changing directions by a side wall portion 32c of the exterior case 3 to reach a position of the motor M.SELECTED DRAWING: Figure 1

A method for retrofitting an installation of a type used for a hybrid propulsion system for LNG carriers, said method being based on the steps of retrofitting an LNG carrier boiler of the installation, retrofitting an existing exhaust gas outlet and integrating a new exhaust gas outlet, forming an opening in the combustion chamber of said LNG carrier boiler, introducing exhaust gas from a GTPG inside the formed opening and adding a second superheater inside the exhaust gas outlet between said GTPG and said LNG carrier boiler, integrating an auxiliary steam and water system and integrating an automatic changeover extraction system and connecting both systems to said hybrid propulsion installation.

The utility model provides a flue baffle door device, and belongs to the technical field. According to the technical scheme, the flue baffle door device is installed between a boiler and a flue gas desulfurization mechanism and comprises a sliding plate door shell, the sliding plate door shell is provided with a first end face, a second end face and a door opening, the first end face and the second end face are oppositely arranged, and the door opening penetrates through the first end face and the second end face. The second end face is in sealed connection with the gas inlet end of the flue gas desulfurization mechanism, the sliding plate door shell is movably connected with at least two sliding plate door bodies, the two sliding plate door bodies are both connected with the driving mechanism, and the driving mechanism is at least used for driving the two sliding plate door bodies to move on the sliding plate door shell so as to jointly close or open the door opening. According to the sliding plate gate, the two sliding plate gate bodies are arranged to jointly close or open the door opening, the moving stroke of the single sliding plate gate body is reduced, the moving stability of the sliding plate gate bodies is improved, and the phenomena of shaking and jamming are effectively avoided.

The invention discloses a heating stove and an operation method thereof. The heating stove comprises a box body, and a containing cavity is formed in the box body. The gas furnace is mounted in the accommodating cavity; the gas supply and exhaust pipe assembly is internally provided with a smoke exhaust channel and an air inlet channel, the smoke inlet end of the smoke exhaust channel is communicated with a smoke exhaust port of the gas furnace, the smoke exhaust end of the smoke exhaust channel is communicated with the atmospheric environment outside the box body, and the air inlet end of the air inlet channel is communicated with the atmospheric environment outside the box body; the air exhaust end of the air inlet channel is communicated with the accommodating cavity; the air inlet temperature sensor is installed in the air inlet channel and used for detecting the real-time air inlet temperature in the air inlet channel; the smoke exhaust temperature sensor is installed in the smoke exhaust channel and used for detecting the real-time temperature in the smoke exhaust channel; or the smoke exhaust temperature sensor is installed in the smoke exhaust port and used for detecting the real-time smoke exhaust temperature in the smoke exhaust port.

The incinerator comprises a combustion chamber, a first flue, a second flue and a third flue which are sequentially communicated, the first flue, the second flue and the third flue form a turn-back type flue gas flow channel, and turbulent flow enhancing inner components are arranged at inlets of the second flue and the third flue. The cross section of the turbulence enhancing inner component is triangular, and one side edge of the turbulence enhancing inner component directly faces the incoming flow direction of smoke. When flue gas flows into the second flue and the third flue, the flue gas is more uniformly distributed on the cross sections of the flues due to the turbulent flow enhancing inner components arranged at the inlets of the second flue and the third flue, so that the utilization rate of a subsequent convection heat exchange surface is increased, the combustion mixing is enhanced, and the combustion efficiency is improved by eliminating a low-temperature region and improving the temperature uniformity. And coking and pollutant generation are inhibited. The turbulent flow enhancing inner components are arranged at the inlets of the second flue and the third flue to improve the flow field, and the flue gas heat exchanger is simple in structure, low in implementation difficulty and low in cost.

A double-walled flue or chimney system (1) comprises a plurality of elements (2) which can be coupled to each other to form a flue or chimney; each element (2) extends along an axis (A) between two longitudinal ends (3, 4) and comprises an inner tube (5) and an outer tube (6), radially spaced apart and separated by an air gap (7); the inner tube (5) and the outer tube (6) have, at respective axially opposite ends, respective radially enlarged female portions (11, 12) defining connection cups, and respective male portions (13, 14), axially opposite the female portions (11, 12) and insertable in respective female portions (11, 12) of another element of the system; the inner tube (5) and the outer tube (6) are both made of polymeric material, in particular polypropylene (PP) ; the female portions (11, 12) of the inner tube (5) and the outer tube (6) are both located at the same longitudinal end (3) of the element (2). Each element comprises a locking ring (30) for axially and radially positioning the inner tube relative to the outer tube. The locking ring is fluidly air tight in order to create insulating compartment when the elements are connected.

The application discloses a kind of heating and processing device for fine slag fluid of pulverized coal gasification, belong to the field of fine slag fluid resource utilization of pulverized coal gasification, including main combustion chamber, secondary combustion chamber and shaft flue;Between main combustion chamber and secondary combustion chamber, and between secondary combustion chamber and shaft flue are provided with cyclone separator, the back material part of the cyclone separator is communicated with main combustion chamber, and energy recovery part is further provided in the shaft flue, and the energy recovery part is communicated with main combustion chamber, and the fuel of the main combustion chamber is the fine slag generated after pulverized coal gasification;The fine slag after pulverized coal gasification is burned by the main combustion chamber, and the energy in tail gas is recovered and filled into main combustion chamber for secondary use by energy recovery part;Secondary combustion chamber is simultaneously used to burn material again, to realize the resource utilization of fine slag after pulverized coal gasification, solid particles and gas are separated by cyclone separator, and solid particles are burned again in main combustion chamber, so that fine slag after pulverized coal gasification is burned more fully.

The utility model relates to the technical field of chimney cap, disclose a chimney cap device with wind -proof rain -proof structure, including fixed cylinder, the fixed cylinder top is fixedly connected with the round sheet, and four square tubes are fixedly inserted with equal distance in the round sheet circumference edge, the round sheet is opened with the square hole of square tube adaptation, four square tubes outside bottom all are fixedly connected with the connecting block, four connecting blocks outside are fixedly connected with same shell, and the shell top is fixedly connected with the conical cover, and the conical cover top is opened with the smoke vent, four square tubes top fixedly connected with same fixed ring, and the fixed ring is linked with four square tubes, and the fixed ring top outside is fixedly connected with the sheltering cylinder. The utility model, realized the path of rainwater into the chimney inside completely blocked, avoid the corrosion of rainwater to chimney inner wall, and do not influence the smoke exhaust work, prolong the service life of chimney, guarantee the safe operation of chimney and related equipment.

This utility model relates to the technical field of ventilation equipment, and more particularly to a non-contact induced draft structure. It includes an induced draft pipe, a booster pipe at one end, and a guide pipe on one side of the induced draft pipe. One end of the guide pipe is located inside the induced draft pipe and coaxially arranged with it. The end face of the guide pipe is flush with the connection surface of the induced draft pipe and the booster pipe. The other end of the guide pipe penetrates the side of the induced draft pipe. An exhaust centrifugal chamber is connected to the outer end of the guide pipe. An exhaust pipe is located at the other end of the booster pipe, and a pressure relief pipe is located at the other end of the exhaust pipe. This utility model provides a non-contact induced draft structure. By introducing high-speed airflow into the induced draft pipe, a negative pressure is formed at one end of the induced draft pipe, preventing the exhaust gas inside the induced draft pipe from contacting the fan. This ensures the fan operates in a non-working medium environment, reducing the risk of equipment corrosion and high temperatures, decreasing equipment failure rate, and offering a simple structure and convenient maintenance.

The utility model provides a horizontal cooling flue for high-temperature and high-dust-content flue gas capable of preventing ash deposition, which comprises a flue arranged in the horizontal direction, a heat exchange tube and an ash bucket, an open hole is arranged at the bottom of the flue, the lower part of the open hole is connected with the ash bucket, and the heat exchange tube is arranged in the flue and is axially arranged along the inner wall of the flue; heat exchange membranes are connected to two sides of the outer wall of the heat exchange tube above the high point of the peripheral line of the opening to cover the inner wall of the flue; and the heat exchange tube positioned below the high point of the periphery of the opening hole is a light tube, and a hollow wall is formed below the opening hole of the flue. Compared with the prior art, the horizontal cooling flue capable of preventing ash deposition can be suitable for horizontal flowing of various kinds of high-temperature and high-dust-content flue gas, has a heat recovery function on the high-temperature flue gas, effectively avoids deposition of smoke dust, and is efficient and energy-saving.

The invention belongs to the technical field of heating hot water furnaces, and discloses a heating hot water module furnace based on a fully premixed combustion technology, which comprises a combustion module, a Venturi tube and a fan, and further comprises a combustion chamber mounted on the combustion module, and a heat exchange mechanism mounted on the combustion chamber; a smoke exhaust pipe and a condensate pipe are arranged on the combustion chamber. According to the scheme, when the equipment runs, return water is conveyed into the water supply assembly through the water pump, a water source is evenly conveyed into the heat exchange pipes for heat exchange after being distributed by the water supply assembly, after the water source is heated through the heat exchange pipes, part of the water source evaporates in the heat exchange pipes and forms bubbles, and the bubbles can penetrate through the grating holes of the grating to form bubbles. The bubbles are divided into a plurality of small bubbles, so that the probability of generating large bubbles is reduced, and the continuity of water flow and the heat exchange uniformity of a water source are improved; and heat exchange, condensation and recovery of heat and moisture in the discharged high-temperature waste gas can be realized, so that the energy-saving effect is achieved.