37 results about "Condensing boiler" patented technology

The invention discloses a small micro-superheated steam through-flow type gas condensation boiler, belongs to the technical field of boilers, and solves the problems that the current small gas boiler is developed towards the high-efficiency, low-emission and compact direction, and particularly pays attention to waste heat recovery and steam quality control. Comprising an annular water chamber allowing water to enter, a combustion chamber arranged above the annular water chamber and an ultra-low nitrogen surface fiber combustor located above the combustion chamber and communicated with the combustion chamber, and an annular steam chamber is arranged above the combustion chamber. The ultra-low nitrogen surface fiber burner works to burn gas and raise the temperature, and the composite fin straight water pipe converts water in the water pipe into wet steam through efficient heat exchange of the spiral fins and enters the annular steam chamber. External water is injected into the annular water chamber through the finned tube group of the flue gas condenser and the connecting tube, and then enters the steam chamber through the straight tube. Wet steam in the steam chamber enters the superheater through an inlet pipe to form micro superheated steam. Combustion smoke is condensed and discharged after being filtered by a filter screen and subjected to heat exchange, and dryness of the combustion chamber is guaranteed.

This invention discloses a heat exchanger for a condensing boiler and its usage method, relating to the field of heat exchanger technology. The device includes a shell with an inlet pipe and an outlet pipe connected within it. A disturbance component is installed inside the shell. A tube sheet and a partition plate are fixedly connected inside the shell, with the tube sheet and partition plate fixedly connected. Multiple circulation pipes are fixedly connected to the tube sheet. The disturbance component in this device, through the cooperation of an inclined baffle plate and a reciprocatingly rotating disturbance plate, can dynamically disturb and enhance the turbulence formed by the flue gas. This solves the problem of weak turbulence and dead zones behind vertically fixed baffle plates in existing technologies. The rotatable disturbance plate can periodically disturb the flue gas, effectively disrupting and reorganizing the flue gas remaining behind the baffle plate, drawing the flue gas in the "dead zone" into the mainstream, enhancing turbulent mixing and heat exchange, and further improving the fluidity of the flue gas in the energy-saving heat exchange device.

A tube profile (1), in particular for manufacturing a heat exchanger for a condensing boiler, wherein the cross-section (10) of the tube profile (1) comprises: a rectangular portion (20) having two greater sides (21, 22) parallel to each other and two smaller sides (31, 32) parallel to each other and orthogonal to the greater sides (21, 22), and an ogival portion (40) defined by a convex flat figure formed by a base (41) and two curved sides (42, 43) connected to each other in an apical zone (48) opposite to said base, wherein said base (41) coincides with a first side (31) of said two smaller sides (31, 32) of the rectangular portion (20), wherein said two curved sides (42,43) are symmetrical to an axis of symmetry (S-S) parallel to said greater sides (21, 22) and passing through the central points (33, 34) of said smaller sides (31, 32), wherein one end of each of said two curved sides (42, 43) joins to one end of a respective one of said two greater sides (21, 22)) in a first joining point (PH1), said each of said two curved sides (42, 43) being tangent to said respective one of said two greater sides (21, 22) in said first joining point (PH1), and wherein an overall dimension of said ogival portion (HO) measured along said axis of symmetry (S-S) is greater than the length of said base (41); wherein the two greater sides (21, 22), a second side of said two smaller sides (32), and said two curved sides (42, 43), define the outer surfaces (50) of the walls of said tube profile (1).

A heat-exchanger unit according to the present invention comprises: a sensible-heat heat-exchange portion arranged in a sensible-heat heat-exchange area for receiving sensible heat generated by a combustion reaction and thereby heating water, the sensible-heat heat-exchange portion having a sensible-heat heat-exchange pipe for receiving the water and causing same to flow through the interior thereof, thereby forming a sensible-heat channel along which the water flows; and a latent-heat heat-exchange portion positioned downstream of the sensible-heat heat-exchange area with reference to a first reference direction along which combustion gas generated during the combustion reaction flows, the latent-heat heat-exchange portion being arranged in a latent-heat heat-exchange area for receiving latent heat generated during a phase change of the combustion gas and thereby heating the water, the latent-heat heat-exchange portion having a latent-heat heat-exchange pipe for receiving the water and causing same to flow through the interior thereof.

The condensing boiler with the tail gas treatment structure comprises a shell, a water inlet is fixedly installed at the side end of the shell, a water outlet is fixedly installed at the end, away from the water inlet, of the shell, a water inlet tank is fixedly installed on the inner wall of the shell, and a heating tank is fixedly installed at the end, close to the water outlet, of the water inlet tank. A first heat exchanger is fixedly installed on the inner wall of the water inlet tank, a second heat exchanger is fixedly installed on the inner wall of the heating tank and fixedly connected to the first heat exchanger, and a heater is fixedly installed at the end, close to the second heat exchanger, of the heating tank. Smoke in the connecting pipe is pumped out through the sucking pump and discharged into the smoke exhaust pipe, the electrostatic generator can generate static electricity and output the static electricity into the smoke exhaust pipe, fine particles in the smoke are attached with the static electricity, then the smoke is discharged into the smoke exhaust box, the particles attached with the static electricity can be adsorbed on the metal net, and unified treatment is facilitated.

A condensing boiler for use with a non-condensing stack, including a heat exchanger with a combination of higher efficiency heat exchanger tubes and lower efficiency heat exchanger tubes.

The present application relates to a condensing boiler furnace with energy-saving and emission-reducing effect, when the mixed gas as fuel is injected into the condensing boiler shell through the gas distribution plate, and then passes through the wind baffle and the flame stabilizing fire grate group, the mixed gas is dispersed into countless uniform small gas beams, and after the mixed gas is ignited, countless small flames are dispersed, so that the flame temperature is not too concentrated, and the unburned mixed gas continues to pass through the wind baffle under the action of wind pressure, so that the fuel and combustion air are further fully mixed, so that the combustion is more sufficient, and the condensing boiler is designed as a whole, adopts the inverted cold flame combustion technology, in the heat exchange fire grate group, the guiding dispersion fire grate group and the flame stabilizing fire grate group, the liquid water can exchange energy with the heat generated by the mixed gas combustion, the reverse heat exchange can rapidly reduce the temperature of the flame root, the flame presents blue flame state, the heat transfer is rapid, the heat exchange is sufficient, and the emission of thermal nitrogen oxides is effectively inhibited.

The invention discloses a heat exchanger of a condensation type boiler and a using method thereof, and relates to the technical field of heat exchangers, the heat exchanger comprises a shell, an air inlet pipe and an air outlet pipe are communicated in the shell, a disturbance assembly is arranged in the shell, a pipe plate and a partition plate are fixedly connected in the shell, and the pipe plate is fixedly connected with the partition plate. A plurality of circulating pipes are fixedly connected to the pipe plate; according to the disturbance assembly in the device, turbulence formed by flue gas can be dynamically disturbed and enhanced through cooperation of the obliquely-arranged baffle plate and the disturbance plate rotating in a reciprocating mode, the problem that in the prior art, turbulence behind a vertical fixed baffle plate is weak, and a dead zone exists is solved, the rotary disturbance plate can periodically disturb the flue gas, and the disturbance effect is good. The flue gas residing behind the baffle plates is effectively disordered and recombined, the flue gas in a dead zone is drawn into a main stream, turbulent mixing and heat exchange are enhanced, and the flowability of the flue gas in the energy-saving heat exchange device is further improved.

The invention discloses a low-NOx combustion compact type condensing boiler device based on deep hydrogen doping, and relates to the technical field of condensing boilers, the low-NOx combustion compact type condensing boiler device comprises a combustion furnace, a premixing box is arranged below the combustion furnace, and a hydrogen injection pipe and an air injection pipe are fixed to the two sides of the premixing box respectively; the premixing box is arranged below the combustion furnace, and the gas uniform mixing mechanism driven by the motor to operate is arranged in the premixing box, so that air and hydrogen can be fully mixed before combustion, deep hydrogen doping is achieved, the combustion uniformity and completeness in the combustion furnace in the follow-up process are ensured, generation of nitric oxide is reduced to a large extent, and the environment-friendly effect is achieved; an air preheating box and a heat exchange box are arranged at the top end of the combustion furnace, water can be heated through smoke waste heat, air can be preheated before mixing, and therefore the initial temperature of mixed gas is increased, the fuel ignition point is reduced, the reaction speed is increased, and the combustion efficiency is remarkably improved; and the heat recovery efficiency is improved by utilizing a dual recovery means for the flue gas waste heat.

The utility model provides a horizontal low-nitrogen high-efficiency condensing boiler, which relates to the technical field of boilers, aims to solve the problems of low heat conduction efficiency, higher temperature of discharged flue gas and poorer heat efficiency of the conventional condensing boiler, and comprises a main body, a heat exchanger A is arranged on the main body; a safety valve is arranged on the left top of the body; a water outlet is formed in the right side of the main body; a middle connecting pipe seat is arranged on the right side of the body bottom; and a gas collecting tank is arranged on the water outlet. The heat exchanger A transmits heat of high-temperature flue gas to water, the flue gas temperature is reduced to 35 DEG C from 150-200 DEG C of a conventional boiler, the heat efficiency is greatly improved and reaches up to 105%, the heat transfer coefficient is high by recovering flue gas waste heat, reducing fuel requirements, reducing heat resistance, ensuring rapid heat transfer and adopting the stainless steel fin type heat exchanger, and the heat exchange efficiency is high. The fin type heat exchanger enlarges the heat exchange area, promotes condensation latent heat recovery, optimizes thermodynamic circulation and improves the convective heat transfer coefficient, the efficient heat transfer capacity of the fin type heat exchanger allows the heat exchange area to be reduced, and the size of the condensation boiler is smaller.

The utility model belongs to the technical field of full-premixing variable-frequency condensing boilers, and particularly relates to a corrosion-resistant full-premixing variable-frequency condensing boiler which comprises a boiler body, a sliding groove is formed in the boiler body, and a first heat exchanger and a second heat exchanger are arranged in the boiler body. Sliding blocks are fixedly connected to the bottoms of the first heat exchanger and the second heat exchanger; an external fixing rod is used for fixing the position of the second heat exchanger, then the first heat exchanger is pulled outwards to drive a positioning block to move synchronously, so that a silicone rubber pad and a spring are moved out of a positioning groove, only the first heat exchanger can be detached, the detaching process of the first heat exchanger is simple, the time needed for detaching can be shortened, and the detaching efficiency is improved. And meanwhile, the second heat exchanger is located in the boiler body and continues to operate, so that the operation stopping time of the corrosion-resistant full-premixing variable-frequency condensing boiler is shortened, and the maintenance cost of the corrosion-resistant full-premixing variable-frequency condensing boiler is reduced.

The utility model discloses a hydrogen-burning fuel gas backflow stable-burning premixing condensing boiler which comprises a lower box body and an upper box body, a water cooling wall is communicated between the lower box body and the upper box body, a plurality of water cooling pipes I are arranged in an air inlet, a flow guide frame body is fixedly connected outside the water cooling pipes I, a plurality of water cooling pipes II are arranged on the downstream of the water cooling pipes I, and the water cooling pipes II are communicated with the upper box body. The second water-cooling pipes are located on the downstream of the first gas channel, second gas channels are formed between the second water-cooling pipes and the adjacent flow guide frame bodies, third gas channels are formed between every two adjacent second water-cooling pipes, a plurality of third water-cooling pipes are arranged on the downstream of the second water-cooling pipes, and a plurality of fourth water-cooling pipes are arranged on the downstream of the third water-cooling pipes. A fin is fixedly connected between the water-cooling pipe II and the water-cooling pipe III, and a water-cooling pipe group I, a water-cooling pipe group II and a water-cooling smoke barrier wall are sequentially arranged in the tapered hearth from upstream to downstream. According to the burner, flame combustion is more stable, meanwhile, the high-temperature flame is cooled, tempering is prevented, and generation of nitric oxide is reduced.

The utility model discloses a novel fully premixed silicon cast aluminum condensing boiler which comprises a boiler body, an auxiliary chamber is arranged in the boiler body, a feeding pipe is fixedly connected to the left side of the auxiliary chamber, an electric valve is fixedly connected to the right side of the feeding pipe, and a discharging pipe is fixedly connected to the right side of the electric valve. A water level sensor is fixedly connected to the upper side of an electric valve, a preparation pool is arranged on the lower side of a discharging pipe, conveying pipes are arranged on the upper side of the preparation pool, a vaporizing chamber is arranged between the conveying pipes, and a second fan is arranged in each conveying pipe, so that acid discharged in the combustion process is neutralized, and the service life is long; a condensation chamber is arranged in the boiler body, a column rod is arranged in the condensation chamber, two connecting plates are fixedly connected to the outer side of the column rod, a descaling assembly is fixedly connected to the other sides of the connecting plates, and a first fan is arranged in the condensation chamber, so that water scale generated by condensation can be discharged.

The invention discloses an intelligent adjusting method for cooling and heating of a water ground source heat pump-electric condensing boiler, and relates to the technical field of water source heat pumps. The method comprises the following steps: firstly, constructing an environment-building-user-equipment four-dimensional database, and collecting full-dimensional data through multiple types of sensors and performing standardization processing; on the basis of building thermal inertia, a load curve is pre-judged through an LSTM model, a pre-adjusting instruction is generated to start a heat pump for heat storage in advance, and starting and stopping of equipment are reduced; when the temperature is extremely low, a heat pump-boiler-phase change heat storage triple generation mode is started, a dynamically updated fuzzy rule base and a gravity center method are combined for ambiguity resolution, heat pump parameters are accurately adjusted, and boiler energy supplementation is dynamically controlled according to heat storage saturation and heat pump COP; and finally, calculating a load coefficient according to user behaviors, dividing regional load levels, and matching differentiated energy combinations to form closed-loop regulation and control. Through cooperation of multiple technologies, the extreme environment adaptability and energy supply precision of the system are improved, energy consumption is reduced, and the system is suitable for various building cooling and heating scenes.

The utility model discloses a condensing boiler capable of filtering smoke dust. A condensation boiler capable of filtering smoke dust comprises a working line, the working line comprises a main body, an input pipe is fixedly installed at the steam input end of the main body, a collecting pipe is fixedly installed at the end, away from the main body, of the input pipe, and a filtering mechanism for filtering the smoke dust of input steam is fixedly installed at the end, away from the input pipe, of the collecting pipe; the metal fiber filter screen is used for filtering passing steam, the filter screen can be quickly replaced only by opening the dismounting layer after the filter device is blocked, when the inside of the filter device is blocked, the flow meter displays that the flow is reduced, and at the moment, the electronic control three-way valve enables a flow channel to be replaced by an emergency flow channel. An operator can quickly replace the filter device only by opening the dismounting layer, and the condensation boiler can continue to operate when the filter screen is replaced.

A combined apparatus (1) for room heating and domestic hot water production is described, comprising a condensing boiler (5) and a heat pump (6). The condensing boiler (5) is provided with an outlet mouth (25) of the combustion fumes and the heat pump (6) comprises an evaporator (19) in which an exchange of heat takes place between a flow of air and combustion fumes and a refrigerant fluid that evaporates, shifting from the liquid phase to the gaseous phase. The combined apparatus (1) is further provided with a casing (26) which encloses, on the inside, the evaporator (19), a combustion fume inlet duct (27), which originates from the outlet mouth (25), and an auxiliary fan (28) configured to suck the air from the external environment and push it, under pressure, towards the evaporator (19); wherein the auxiliary fan (28) is placed upstream of the air-fume mixing node (35), separated and at a certain distance from the evaporator (19).

The utility model relates to a condensed water collecting mechanism for a condensed steam boiler, which comprises a collecting disc, two water guide plates are fixedly connected in the collecting disc, the two water guide plates form a drainage ditch, a drainage hole is arranged in the collecting disc, a drainage channel is arranged in the collecting disc, a placing groove is arranged in the collecting disc, and the placing groove is arranged in the collecting disc. The top of the water guide plate is an inclined plane, the outer surface of the water guide plate is fixedly connected with a mute layer, the drainage ditch is located on one side of the drainage hole, the drainage hole is communicated with the drainage channel, a slope is formed in the top of the water storage disc, and the inclination angle of the top face of the slope is the same as that of the inclined plane of the drainage channel. According to the condensate water collecting mechanism for the condensation steam boiler, through the design of the drainage ditch formed by the two water guide plates, condensate water can be rapidly guided to a designated position, the collecting efficiency is effectively improved, meanwhile, through the design of communication between the drainage hole and the drainage channel, it is ensured that the condensate water can be smoothly drained, and the water accumulation phenomenon is avoided.

Heat exchange cell (1) for condensing boilers, defining a containment volume (2), comprising a burner (3), at least one conduit (6) used for circulation of a heat transfer fluid, and an evaporator (7) of a refrigerant circuit. The burner (3) is configured to carry out combustion so as to produce combustion fumes (4). The heat transfer fluid is configured to exchange heat with the burner (3) and / or the fumes. The evaporator (7) is configured to lower an ambient temperature inside the containment volume (2), in particular of the fumes.

The utility model relates to the technical field of pipeline connection, and discloses a pipeline connection structure of an ultra-low nitrogen condensation boiler, which is characterized in that adjustable cambered surface clamping blocks are hinged to the inner walls of the middle ends of a fixed frame and a hinged frame, movable blocks are rotatably connected to the inner walls of the two sides of the top of a connection positioning block, and rotating blocks are rotatably connected to the inner walls of the two sides of the bottom of each movable block; a movable frame is hinged to the inner wall of the top end of the adjustable cambered surface clamping block, a rotating screw is rotationally connected to the inner wall of the middle of the rotating block, and the bottom end of the rotating screw is in threaded connection to the inner wall of the top end of the movable frame. Through the arrangement of the cambered surface clamping block, the rotating screw rod and the movable block, the movable frame can be driven to move by rotating the rotating screw rod, then the adjustable cambered surface clamping block is driven to rotate around a hinge point, the clamping force and the clamping position of the adjustable cambered surface clamping block to a pipeline assembly are changed, and the adjustability can adapt to pipeline assemblies with different pipe diameters; and the installation requirements of pipelines of various specifications are met, and the universality of the connecting structure is improved.

1. The name of the design product: condensate collector (ADW-U210). 2. The use of the design product: for condensate boiler in the process of work, to prevent the condensate backflow into the boiler liner, cause the heat in the liner and condensate synchronous outflow, so as to protect the boiler from damage. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The utility model relates to the technical field of low-nitrogen condensing boilers, in particular to an air connecting pipe for a low-nitrogen condensing boiler, which comprises an elbow pipe, a shell, a cylindrical rotating seat rotatably connected in the shell, and a driving component used for driving the rotating seat to rotate, the two ends of the shell communicate with the elbow pipe through an air inlet pipe and an air outlet pipe correspondingly, a plurality of through holes are formed in the rotating seat, filter screens are detachably connected into the through holes, the driving assembly is installed on the shell, and the through hole rotating to the uppermost end communicates with the air inlet pipe and the air outlet pipe; the number of the through holes is at least four, and the at least four through holes are arranged at equal angles with the axis of the rotating base as the center. When the filter screen needs to be replaced, the driving assembly drives the rotating seat to rotate, and the filter screen can be replaced by replacing the opposite through holes between the air inlet pipe and the air outlet pipe; according to the utility model, the filter screen can be detached and replaced without closing the elbow pipe, so that the stability of the low-nitrogen condensing boiler in use is ensured.

The invention relates to the technical field of boilers, and discloses a circulating condensation boiler which comprises a combustion chamber and further comprises two sets of liquid guide rings, the two sets of liquid guide rings are fixed to the two ends of the inner wall of the combustion chamber respectively, the tops of the two sets of liquid guide rings are fixed and communicated with a water supplementing pipe and a steam pipe respectively, and multiple sets of heat exchange pipes are installed between the two sets of liquid guide rings; by synchronously driving the condensation pipe and the outer magnetic ring to rotate, on one hand, the condensation pipe and smoke generate relative motion, a thermal boundary layer is destroyed, a temperature field is homogenized, and the heat exchange efficiency is improved; meanwhile, pipe wall condensate is thrown away in time through centrifugal force, liquid film thermal resistance is reduced, heat transfer efficiency is improved, retention of acid liquid is reduced, corrosion is effectively relieved, and the service life of the condensation pipe is prolonged; and on the other hand, the flow guide impeller is driven to rotate through magnetic coupling, water flow circulation is accelerated, convective heat exchange is enhanced, flue gas waste heat is recycled more efficiently, condensation is promoted, the exhaust gas temperature is remarkably reduced, and the waste heat utilization efficiency is improved.

The present application relates to the technical field of condensing boiler, and particularly relates to a waste heat utilization device and application thereof in a condensing boiler, which comprises a boiler assembly, the boiler assembly comprises a boiler body, the top of the boiler body is provided with a condensing assembly, the condensing assembly comprises a box arranged on the boiler body, the inside of the box is provided with array-distributed condensing pipes, and the flat part of each condensing pipe is provided with a connecting assembly; the connecting assembly comprises a rotating piece, the two sides of the rotating piece are provided with connecting plates, the middle part of each connecting plate is rotationally connected with a rotating ring, and the rotating ring and the rotating piece are provided with array-distributed heat transfer pieces; the opposite side of each adjacent heat transfer piece is provided with a connecting piece, and the heat transfer piece close to the rotating piece is connected with the rotating piece through the connecting piece; the connecting assembly arranged on the condensing pipe can solve the technical problem that dust and other impurities in flue gas are easily attached in the low-speed area, thereby causing the heat exchange efficiency of the condensing pipe to be reduced.

The application discloses a kind of air source heat pump-gas condensing boiler and water ground source cold machine collaborative method, it is related to heating ventilation air conditioning system energy-saving control technical field;The method integrates three major core equipment and edge computing control platform, multidimensional perception system, cross-device waste heat closed-loop recovery system, fault redundancy control system, is linked waste heat recovery and soil heat balance self-adaptive adjustment logic by edge computing control platform, and soil temperature and various operating data are collected by multidimensional perception system, relies on built-in double-algorithm regulation and control waste heat recovery path in platform, distribution ratio and equipment load, realize two-way support.The normal operating condition is according to data acquisition, algorithm operation, collaborative execution step closed-loop control, fault detection, scheme generation, execution adjustment and system reset are completed under fault condition, realize fault redundancy and waste heat recovery collaboration, guarantee system full-condition efficient and stable operation, improve energy efficiency and maintain soil heat balance.

The present invention provides a water-cooled burner and a condensing boiler. The water-cooled burner includes a tubular body and a fluid box connected to both ends of the tubular body. The tubular body includes an inner tube and multiple outer tubes. The inner tube extends along the central axis and has a mixing chamber. The inner tube is provided with multiple rows of openings. The multiple outer tubes are arranged in parallel and wound around the outer side of the inner tube, and the length direction of the multiple outer tubes is consistent with the central axis direction of the inner tube. The fluid box has a fluid inlet and a fluid outlet, and the fluid inlet and the fluid outlet are respectively connected to the multiple outer tubes. The burner of the present invention is not easy to cause blockage, has a good heat exchange effect, and can reduce the nitrogen oxide content in the flue gas.

A condensing boiler for use with a non-condensing stack, including a heat exchanger with a combination of higher efficiency heat exchanger tubes and lower efficiency heat exchanger tubes.

This invention relates to the field of boiler technology, specifically to a fully premixed condensing boiler system, comprising: a fully premixed low-NOx burner module for mixing fuel gas and air in a specific ratio and stabilizing combustion; a staged condensing heat exchanger module for staged recovery of sensible and latent heat from flue gas; an operating condition control module for coordinating and controlling the operation of the entire system; and a condensate neutralization and reuse module for treating and reusing the acidic condensate generated by the boiler. The beneficial effects of this invention are: by controlling NOx through premixing and combustion control, NOx is effectively controlled. x By reducing emissions and CO emissions through staged countercurrent heat exchange and latent heat recovery, the gas-fired boiler's gas-saving rate is improved, and operating costs are reduced. Through adaptive correction of gas calorific value, the boiler can maintain efficient and low-NOx operation within the load range. At the same time, the condensate reuse rate is improved, realizing the recycling of water resources.

The utility model belongs to the technical field of condensing boilers, and particularly relates to a full-premixing air inlet noise reduction device for a condensing boiler, which comprises a box body, a filter shell is arranged on the bottom side of a top plate of the box body and positioned at an air inlet hole, a base plate is arranged on the inner wall of the filter shell, a rotating shaft is rotatably arranged on the top plate of the box body, and an air inlet is formed in the rotating shaft. A cover plate is fixedly arranged on the rotating shaft in a sleeving manner, a plate groove is formed in the cover plate, a clamping plate is mounted on the lifting block, a rod seat is mounted on the cover plate, the bottom side of the screw rod is rotationally connected with the clamping plate, a filter element is placed in the filter shell, and the screw rod drives the clamping plate to move upwards in the rotating process by rotating the screw rod; the clamping plate moves upwards into the plate groove of the cover plate, then the cover plate is rotated, the air inlet hole is opened, then the filter element is directly taken out, and a new filter element is placed into the filter shell from the air inlet hole, so that the filter element is conveniently replaced, tedious disassembly by using tools is avoided, and the convenience of replacement of the filter element is improved.

An evaporator for a condensing boiler comprises a box body, an air inlet pipe and a water outlet pipe are communicated with the lower side of the side wall of the box body, an air outlet pipe, a water inlet pipe and an air return pipe are communicated with the upper side of the box body, a heater is fixedly installed in the box body, a vertical pipe is rotatably installed in the box body, a screw is rotatably installed in the vertical pipe, and two nuts are installed on the periphery of the screw in a threaded fit mode. The periphery of the nut is hinged to one ends of a plurality of first connecting rods, a plurality of through grooves corresponding to the first connecting rods are formed in the vertical pipe, the other ends of the first connecting rods extend out of the corresponding through grooves and are hinged to the middles of stirring rods, and the close ends of the two stirring rods on the same side are hinged to the vertical pipe through second connecting rods. The stirring device is simple in structure and ingenious in conception, the stirring rod can stir steam in the box body, the heater can fully heat the steam in the box body, the inclination degree of the stirring rod can be changed through the first connecting rod along with vertical movement of the nut, and therefore the stirring range is changed, market requirements can be met, and the stirring device is suitable for popularization.