47results about How to "Enhanced axial elasticity" patented technology

The invention discloses a heat pump type waste heat utilization inertial dust collection penetrating countercurrent drying machine. An exhaust hood of the drying machine is connected with an induced draught fan. The induced draught fan is evacuated after being connected with an evaporator of a heat pump system through a cyclone dust collector and a repeated back-turning baffle type inertial dust collector. The evaporator of the heat pump system is connected with a main machine through a refrigerant pipe. The main machine is connected with a condenser through a refrigerant pipe. The air outlet end of an air blower is connected in an air inlet hood through the condenser. Blades of an impeller of the induced draught fan are arranged to be in a radial shape and centrosymmetric about an impeller shaft in the radial direction, dust can be removed in time under the effect of centrifugal force, and safety accidents are avoided. The drying efficiency is improved, energy conservation and emission reduction are achieved, more importantly, a demounting and mounting technology of the induced draught fan is transformed to a great extent, when the induced draught fan is demounted, the pressure applied to the end face of a screw shaft shoulder by nut-like parts can be simply eliminated, the problem that the induced draught fan assembled in a threaded manner is automatically locked continuously under the effect of loads and cannot be easily demounted is effectively solved, the heat pump type waste heat utilization inertial dust collection penetrating countercurrent drying machine is particularly suitable for convenient demounting of large draught fans which are locked in a threaded manner, and effects are particularly obvious.

The invention discloses a heat supply system of a biomass boiler. A high-position soft water pool supplies water to the boiler, a boiler body is provided with a hot water outlet pipe connected to rooms, and a high-temperature tail gas pipe of the boiler body is connected to an air induction fan; valves are arranged in the rooms for controlling hot water bathing, solenoid valves are additionally arranged and are linked to fan coils for working, and a water return pipe gathers flow and returns; a coupling and a fan shaft of the air induction fan are assembled in a threaded mode, a fan impeller and the fan shaft of the air induction fan are assembled in a threaded mode, and the thread rotation direction is the automatic locking direction along with working and bearing; the fan impeller is in threaded and rigid connection with the fan shaft after pressing a copper-lead torsion composite pad; the coupling and the other end of the fan shaft are connected rigidly through a clamp part. According to the system, heat recovery and purification treatment of tail gas of the boiler are realized, the disassembly and assembly technology of the air induction fan of the boiler is greatly modified, the problems that the air induction fan of the boiler is continuously and automatically locked and is difficult to disassemble under the loading effect due to threaded assembly can be effectively solved, and large boiler fans can be disassembled conveniently and quickly after being locked in a threaded mode.

The invention discloses a simple Raymond mill device with a fan convenient to disassemble. The fan, a Raymond mill, a cyclone separating and discharging device and an air return duct form an air-flow-circulating ground-powder discharging system. An isolating temporary storage barrel is arranged at an inlet, connected with the air return duct, of the fan. A gravity material door is arranged on the isolating temporary storage barrel. A temporary powder storage barrel is arranged below the gravity material door. A valve and a discharging gate are arranged on the temporary powder storage barrel. Blades of an impeller of the induced draft fan are arranged symmetrical about the center of an impeller shaft in the radial direction in a radial manner, dust can be cleared up in time through centrifugal force, and safety accidents are avoided. The simple Raymond mill device is simple in structure, and more importantly, the disassembly technology of the induced draft fan is improved greatly, so that pressure applied to the shaft shoulder end face of a screw by components similar to a nut component can be eliminated easily when the induced draft fan is disassembled, and the problem that the induced draft fan is locked continuously and automatically and cannot be disassembled easily under the load action due to threaded assembly is solved effectively; and the simple Raymond mill device is especially suitable for convenient and fast disassembly of the large-scale fan which is locked in a threaded manner, and the effect is especially remarkable.

The invention discloses a tail heat utilization sieve mesh turning-plate type drier. A drier box body is provided with a structure of sieve mesh turning-plate type conveying from top to bottom and is divided into an upper drying area, a middle drying area and a lower drying area by a middle baffle and a lower baffle. The upper drying area is connected with an induced draft fan through an air heat exchanger and then is drained; the air outlet end of the upper drying area is connected with an air inlet of an air blower through an air pipe; and an air outlet of the air blower is connected with a steam fin heater in the middle drying area. Blades of an impeller of the induced draft fan are arranged in a radiated mode with an impeller shaft being in radial symmetry and central symmetry, dust is cleaned up in time by centrifugal force, and safety accidents are avoided. The tail heat utilization sieve mesh turning-plate type drier improves the drying efficiency and achieves energy saving and emission reduction; more importantly, the disassembling technology of the induced draft fan is greatly improved, and the induced draft fan can simply eliminate the pressure of nut-like parts to the shaft shoulder end faces of screw rods when being disassembled, so that the problem that due to the threaded assembly mode, the induced draft fan is continuously and automatically locked under the load action and is not likely to be disassembled is effectively solved; and the tail heat utilization sieve mesh turning-plate type drier is particularly suitable for convenient disassembling of large draft fans after threaded locking, and the effect is very obvious.

The invention discloses an exhaust heat recovery and dust removal integrated biomass boiler heating system. A high-position soft water tank is used for supplying water for a boiler; a boiler main body is provided with a hot water outlet pipe connected with rooms; a high-temperature exhaust pipe of the boiler main body is connected with an induced-draft fan; valves are arranged in each room to control hot water for use during a bath, and an electromagnetic valve is added and is linked with fan coils to work; a water return pipe is used for converging flow and returning water; a thread assembly is adopted by each of a coupling, a fan shaft and a fan impeller of the induced-draft fan; a helical direction of threads is a direction of automatic locking along with working and bearing; after tightly compressing a copper and lead torsion composite gasket, the fan impeller is in threaded rigid connection with the fan shaft; and the coupling and the other end of the fan shaft are enabled to be also in rigid connection by a hoop part. According to the exhaust heat recovery and dust removal integrated biomass boiler heating system disclosed by the invention, heat recovery and purification treatment on boiler exhaust are realized, and more importantly, a problem that the thread assembly of the induced-draft fan of a boiler is not easy to disassemble due to the fact that the thread assembly automatically locks continuously under load action can be effectively solved, and the exhaust heat recovery and dust removal integrated biomass boiler heating system is especially suitable for conveniently disassembling a large boiler fan under thread locking.

The invention discloses an induced-draft traditional Chinese medicinal material pulverizer with a convenient-to-disassemble induced draft fan. The induced-draft traditional Chinese medicinal material pulverizer comprises a pulverizer body and the induced draft fan, wherein the material falling end of the pulverizer body is connected with the induced draft fan by a material storage box, exhaust tubes and a cyclone separator, and a ventilation door used for adjusting air volume is arranged one exhaust tube, a pull-back separator is arranged on the exhaust tube, the material falling end of the pull-back separator is connected with a feed hopper, and the feed hopper is connected with the pulverizer body; and an impeller of the induced draft fan can promptly clean dust by use of the centrifugal force. The induced-draft traditional Chinese medicinal material pulverizer not only can complete returning and secondary crushing of coarse particles in one step to realize qualified material output, and more importantly, the assembly and disassembly technology of the induced draft fan is greatly improved to ensure that pressure exerted on the end surface of a screw shaft shoulder by similar nut parts is simply eliminated during disassembly of the induced draft fan, so that the problem that the induced draft fan in screw assembly is continually and automatically locked under the load action and therefore is difficult to disassemble is solved. The improved assembly and disassembly technology is particularly suitable for convenient disassembly of a large-scale fan in screw-threaded coupling, and the effect is particularly remarkable.

The invention discloses a bag filter-type manganese processing rotary kiln system with a highly demountable induced draft fan. The bag filter-type manganese processing rotary kiln system adopts the structure that an air-lock valve used for feeding is arranged at the high end of a rotary kiln; the high end of the rotary kiln is connected with a cyclone dust extractor, an induced draft fan and a bag-type dust remover via a fin section and air pipes; fins are arranged in the fin section; a hood cylinder is arranged outside the fin section; a sleeve-type air heat exchanger is arranged outside an air pipe; the hood cylinder is communicated with a lower pumping hole in the air heat exchanger, and then divided into two paths for supplying preheated air; and the blades of the impeller of the induced draft fan are arranged in a radiation shaped and are in radial and central symmetry with respect to an impeller shaft, so that dust can be cleaned promptly via centrifugal force, and safety accidents can be avoided. The bag filter-type manganese processing rotary kiln system not only is high in heat efficiency, but also has the advantages that the demounting technology of the induced draft fan is greatly improved; pressure of a nut-like component on a shaft shoulder end surface of a screw can be eliminated simply during demounting, the problem that a threaded assembly of the induced draft fan is automatically screwed continuously under the action of a load to be difficult to demount can be solved effectively; the suitability for convenient demounting of a large-scale induced draft fan after thread screwing is high; and the effect is remarkable.

The invention discloses a residual heat recycling and dust removal integrated coal-fired boiler with a conveniently detachable draught fan. A cyclone dust removal residual heat efficiency recycling device is formed by overlapping a tubular heat exchanger and a cyclone dust remover; a boiler exhaust pipe is connected with the cyclone dust remover in a tangential direction; after cyclone dust removal is carried out, ash is discharged from a cone bottom through an air closing device; exhaust is connected with a cone body through a rotational flow ascending pipe, is uniformly dispersed and then penetrates through tubes; after being concentrated through an upper conical hopper, the exhaust is discharged by the draught fan through an exhausting pipe; a high-level water tank is connected with the lower part of a shell side of the tubular heat exchanger; and an impeller of the draught fan can be used for cleaning the ash in real time through a centrifugal force. The residual heat recycling and dust removal integrated coal-fired boiler realizes integrated type residual heat recycling and dust removal; more importantly, a dismounting technology of the draught fan is greatly improved, and pressure on the end face of a screw shaft shoulder of a screw cap part can be simply eliminated in a dismounting process, so that the problem that thread assembling of the draught fan is continuously automatically locked under the action of a load and thus detachment is not easy is effectively solved; and therefore, the technical scheme is particularly suitable for conveniently detaching a large-size draught fan locked through a thread and the effect is particularly remarkable.

The invention discloses a double-temperature hot water system for a natatorium. A tail gas tube of a fire grate biomass boiler is emptied after being connected with a tubular heat exchanger through an induced draft fan; the fire grate biomass boiler carries out constant temperature keeping and heating on pool water; a fixed bed biomass boiler supplies bathing hot water; a coupling of the induced draft fan is in threaded assembly with both a fan shaft and a fan impeller; the thread turning direction is in a working and bearing automatic locking direction; the fan impeller forms threaded rigid connection with the fan shaft after compacting a copper-lead torsion compound pad; and the coupling also forms threaded rigid connection with the other end of the fan shaft through a hoop part. The double-temperature hot water system for the natatorium supplies double-temperature hot water, recovers tail heat of the boiler, more importantly transforms the disassembly and assembly technology of the induced draft fan of the boiler dramatically, can efficiently solve the problem of difficulty in disassembly as threaded assembly of the induced draft fan of the boiler is continuously automatically locked under the loading action and is particularly suitable for convenient and rapid disassembly of a fan of a large boiler after being in threaded locking.

The invention discloses a cyclone type mineral flotation and defoaming device with an induced draft fan convenient to disassemble. The cyclone type mineral flotation and defoaming device is characterized in that a flotation machine is connected with a foam feeding hopper, the foam feeding hopper is connected with the induced draft fan by a primary cyclone separator, secondary cyclone separators are connected with the induced draft fan, an exhaust pipe is connected to the tops of the secondary cyclone separators, discharge pipes at the bottoms of the primary cyclone separator and the secondary cyclone separators are connected with a spiral conveyor, and a discharge outlet of the spiral conveyor is connected with a sedimentation tank; an impeller of the induced draft fan can timely clean dust by the aid of centrifugal force. The cyclone type mineral flotation and defoaming device has the advantages that emission and water consumption can be reduced, chemicals can be saved, the cyclone type mineral flotation and defoaming device is high in defoaming speed, more importantly, disassembling technologies for the induced draft fan are changed to a great extent, accordingly, pressures of components similar to nuts on the end surfaces of shaft shoulders of screws can be easily eliminated when the induced draft fan is disassembled, the problem that an existing induced draft fan assembled in a threaded manner is continuously automatically locked under the effects of load and is difficult to detach can be effectively solved, the cyclone type mineral flotation and defoaming device is particularly applicable to conveniently and quickly detaching large fans after the large fans are locked in a threaded manner, and particularly obvious effects can be realized.

The invention discloses a Raymond mill device with a convenient-to-disassemble fan. The fan, a Raymond mill, a cyclone separation discharger and a return air pipe form an airflow circulating milling discharging system, a pressure-equalizing exhausting branched pipe is connected with the upper end of a cyclone pipe, multiple cyclone separators are arranged in the cyclone pipe, the lower end of the cyclone pipe is tangentially connected with the cyclone separation discharger, the cyclone separation discharger discharges purified air and immerses below liquid level of a circulating water pool which is connected with the upper end of the cyclone pipe, blades of an induced draft fan impeller are arranged radially in a manner than the impeller is in axial, radial and central symmetry, and centrifugal force can be utilized to timely clean dust to avoid safety accidents. The Raymond mill device is less prone to causing mineral powder dust leakage, disassembling and assembling technology of an induced draft fan is improved substantially, pressure applied on screw shaft shoulder end faces by nut parts can be eliminated simply during disassembling of the fan, and the problem that the induced draft fan which is in threaded assembly constantly locks automatically and is difficult to disassemble under load action is solved effectively. The Raymond mill device is especially suitable for and has particularly remarkable effect on convenient and quick disassembling of large fans after being locked in a threaded manner.

The invention discloses a heat pump type reverse flow drying machine with the exhaust heat utilization and inertial dedusting functions. A draught hood of the drying machine is connected with an induced draft fan. The induced draft fan is connected with an evaporator of a heat pump system through a cyclone dedusting device and an inertial dedusting device for evacuation. The evaporator of the heat pump system is connected with a main machine through a refrigerant pipe. The main machine is connected with a condenser through the refrigerant pipe. The air outflow end of an air blower is connected with an air inflow hood through the condenser. Blades of an impeller of the induced draft fan are arranged symmetrical about the center of an impeller shaft in the radial direction in a radial manner, the dust can be cleared up in time through centrifugal force, and safety accidents are avoided. By the adoption of the heat pump type reverse flow drying machine with the exhaust heat utilization and inertial dedusting functions, drying efficiency is improved, and energy saving and emission reduction are achieved; and more importantly, the disassembly technology of the induced draft fan is improved greatly, so that pressure applied to the shaft shoulder end face of a screw by components similar to a nut component can be eliminated easily when the induced draft fan is disassembled, and the problem that the induced draft fan is locked continuously and automatically and cannot be disassembled easily under the load action due to threaded assembly is solved effectively; and the heat pump type reverse flow drying machine with the exhaust heat utilization and inertial dedusting functions is especially suitable for convenient and fast disassembly of a large-scale fan which is locked in a threaded manner, and the effect is especially remarkable.

The invention discloses a two-stage heat recovery type cyclone dust removal coal-fired boiler.A high-temperature tail gas tube of a boiler body is connected with an induced draft fan through an air preheating plate type heat exchanger, a water preheating shell-and-tube heat exchanger tube pass and a cyclone dust collector.A high-position soft water pond is preheated through a water preheating shell-and-tube heat exchanger shell pass and then supplies water to the boiler through a high-pressure pump system.A coupler and a fan shaft, and fan impellers and the fan shaft of the induced draft fan are assembled through threads, and the thread screwing direction is the same as the automatic locking direction of working and bearing.After the fan impellers compress a copper-lead torsion composite gasket, thread rigid connection is formed by the fan shaft.By means of clamping parts, the coupler and the other end of the fan shaft form rigid connection.By means of the two-stage heat recovery type cyclone dust removal coal-fired boiler, two-stage heat recovery and purification treatment of boiler tail gases are achieved, more importantly, the dismounting technology of the boiler induced draft fan is greatly improved, the problem that the boiler draft fan continuously and automatically locks under the load action and is not easy to dismount due to thread assembling can be effectively solved, and the two-stage heat recovery type cyclone dust removal coal-fired boiler is especially suitable for convenient dismounting after thread locking of large boiler draft fans.

The invention discloses a green inertial dust catching preserved product smoking and roasting device with a convenient-to-disassemble induced draft fan. A smoke generation pipeline of a smoke generation furnace penetrates through a wall body to be connected with an air inlet pipe of a cyclone separator, the cyclone separator is connected with the induced draft fan through a pipeline and an inertial dust catcher, and an air outlet of the induced draft fan is arranged in the wall body; a wedge disc is arranged on the smoke generation pipeline of the smoke generation furnace; a light valve is arranged at the bottom of the cyclone separator, and a heat radiator and a vibrator are arranged on the surface of the cyclone separator; blades of an impeller of the induced draft fan are radially arranged symmetrically about the radial direction and center of an impeller shaft, and dust can be timely cleaned by virtue of centrifugal force. According to the device, green and energy-saving smoking and roasting can be implemented; more importantly, an assembling and disassembling technology for the induced draft fan is greatly changed, so that the pressure of parts such as screw caps on the end surfaces of a screw shaft shoulder can be simply eliminated during disassembling, the problem of high disassembling difficulty caused by continuous automatic locking under the action of a load in case of threaded assembling of the induced draft fan is effectively solved, and the device is particularly suitable for convenient disassembling of a large-sized fan after threaded locking, and has particularly remarkable effects.

The invention discloses a heat pump type reverse flow drying machine with the exhaust heat utilization and inertial dedusting functions. A draught hood of the drying machine is connected with an induced draft fan. The induced draft fan is connected with an evaporator of a heat pump system through a cyclone dedusting device and an inertial dedusting device for evacuation. The evaporator of the heat pump system is connected with a main machine through a refrigerant pipe. The main machine is connected with a condenser through the refrigerant pipe. The air outflow end of an air blower is connected with an air inflow hood through the condenser. Blades of an impeller of the induced draft fan are arranged symmetrical about the center of an impeller shaft in the radial direction in a radial manner, the dust can be cleared up in time through centrifugal force, and safety accidents are avoided. By the adoption of the heat pump type reverse flow drying machine with the exhaust heat utilization and inertial dedusting functions, drying efficiency is improved, and energy saving and emission reduction are achieved; and more importantly, the disassembly technology of the induced draft fan is improved greatly, so that pressure applied to the shaft shoulder end face of a screw by components similar to a nut component can be eliminated easily when the induced draft fan is disassembled, and the problem that the induced draft fan is locked continuously and automatically and cannot be disassembled easily under the load action due to threaded assembly is solved effectively; and the heat pump type reverse flow drying machine with the exhaust heat utilization and inertial dedusting functions is especially suitable for convenient and fast disassembly of a large-scale fan which is locked in a threaded manner, and the effect is especially remarkable.

The invention discloses a hot-air penetration and reversed-current drying machine for tail heat utilization and inertial dust catching. According to the invention, an air draft hood of a drying machine box body is connected with an induced draft fan, and the induced draft fan is tangentially connected with a cyclone dust removal and efficient tail heat recovery device which is formed by superposing a tubular heat exchanger and a cyclone dust remover via an inertial dust catcher, and then is emptied; a shell-pass intake end of the tubular heat exchanger is connected with an air blower, and an exhaust end is connected with an air intake hood via a steam finned heater; and blades of an induced draft fan impeller are arranged to be in a radial shape with impeller-shaft radial and central symmetry, and ash can be timely cleaned by virtue of a centrifugal force, thus security incidents are avoided. According to the invention, drying efficiency is improved, and energy conservation and emission reduction are realized; and more importantly, a detachment technology for the induced draft fan is greatly improved, and a pressure of components such as a nut on the end surface of a shaft shoulder of a screw during detachment for the induced draft fan can be simply eliminated, thus the problem is effectively solved that the induced draft fan is not easy to detach due to continuously automatic locking in thread assembly for the induced draft fan under the action of a load. The hot-air penetration and reversed-current drying machine for tail heat utilization and inertial dust catching is especially suitable for convenient detachment for a large fan after thread locking, and has a particularly remarkable effect.

The invention discloses a tail heat recovery type steam plate dryer. An upper drying area of the dryer is tangentially connected with a cyclone dust removal tail heat efficient recovery device through an induced draft fan, and a tube type heat exchanger and a cyclone dust remover are overlaid to form the cyclone dust removal tail heat efficient recovery device. After cyclone dust removal, dust is discharged at the cone bottom through an air-lock valve. Tail gas is connected with a cone body through a cyclone ascending pipe, penetrates through a tube nest after being evenly dispersed, and is exhausted through an exhaust pipe after being concentrated by an upper cone hopper. Blades of an impeller of the induced draft fan are arranged in the radial shape that the blades are centrosymmetric in the radial direction of an impeller shaft, and the dust can be removed through centrifugal force in time. According to the tail heat recovery type steam plate dryer, the drying efficiency is improved, and energy conservation and emission reduction are realized; more importantly, the dismounting technology of the induced draft fan is changed substantially, so that when the induced draft fan is dismounted, pressure of components like nuts on the end faces of screw shaft shoulders can be eliminated simply, the problem that the induced draft fan is constantly automatically locked and is difficult to dismount under the action of loads during threaded assembling is solved effectively, and the technology is especially suitable for conveniently dismounting a large fan locked through threads.

The invention discloses a hot-air penetration and reversed-current drying machine for tail heat utilization. According to the invention, an air draft hood of a drying machine box body is connected with an induced draft fan, and the induced draft fan is tangentially connected with a cyclone dust removal and efficient tail heat recovery device which is formed by superposing a tubular heat exchanger and a cyclone dust remover, and then is emptied; a shell-pass intake end of the tubular heat exchanger is connected with an air blower, and an exhaust end is connected with an air intake hood via a steam finned heater; and blades of an induced draft fan impeller are arranged to be in a radial shape with impeller-shaft radial and central symmetry, and ash can be timely cleaned by virtue of a centrifugal force, thus security incidents are avoided. According to the invention, drying efficiency is improved, and energy conservation and emission reduction are realized; and more importantly, a detachment technology for the induced draft fan is greatly improved, and a pressure of components such as a nut on the end surface of a shaft shoulder of a screw during detachment for the induced draft fan can be simply eliminated, thus the problem is effectively solved that the induced draft fan is not easy to detach due to continuously automatic locking in thread assembly for the induced draft fan under the action of a load. The hot-air penetration and reversed-current drying machine for tail heat utilization is especially suitable for convenient detachment for a large fan after thread locking, and has a particularly remarkable effect.

The invention discloses an exhaust heat recovery type steam slab drying machine with the inertial dust collecting function. An upper drying region of the drying machine is connected with an efficient cyclone dedusting exhaust heat recovery device in a tangential manner through an induced draft fan and an inertial dust collecting device, wherein the efficient cyclone dedusting exhaust heat recovery device is formed by stacking a tube bank type heat exchanger and a cyclone dust collector. Dust is discharged through a closed-air aspirator at the cone bottom after rotational flow dedusting. Exhaust communicates with a cone through a rotational flow ascending pipe, penetrates a tube bank after being evenly dispersed and is concentrated by a conical hopper on the upper portion and then exhausted through an exhaust pipe. Blades of an impeller of the induced draft fan are arranged symmetrical about the center of an impeller shaft in the radial direction in a radial manner, and the dust can be cleared up in time through centrifugal force. By the adoption of the exhaust heat recovery type steam slab drying machine with the inertial dust collecting function, drying efficiency is improved, and energy saving and emission reduction are achieved; and more importantly, the disassembly technology of the induced draft fan is improved greatly, so that pressure applied to the shaft shoulder end face of a screw by components similar to a nut component can be eliminated easily when the induced draft fan is disassembled, and the problem that the induced draft fan is locked continuously and automatically and cannot be disassembled easily under the load action due to threaded assembly is solved effectively; and the exhaust heat recovery type steam slab drying machine with the inertial dust collecting function is especially suitable for convenient and fast disassembly of a large-scale fan which is locked in a threaded manner.

The invention discloses a two-stage heat recovery type cyclone dust removal coal-fired boiler.A high-temperature tail gas tube of a boiler body is connected with an induced draft fan through an air preheating plate type heat exchanger, a water preheating shell-and-tube heat exchanger tube pass and a cyclone dust collector.A high-position soft water pond is preheated through a water preheating shell-and-tube heat exchanger shell pass and then supplies water to the boiler through a high-pressure pump system.A coupler and a fan shaft, and fan impellers and the fan shaft of the induced draft fan are assembled through threads, and the thread screwing direction is the same as the automatic locking direction of working and bearing.After the fan impellers compress a copper-lead torsion composite gasket, thread rigid connection is formed by the fan shaft.By means of clamping parts, the coupler and the other end of the fan shaft form rigid connection.By means of the two-stage heat recovery type cyclone dust removal coal-fired boiler, two-stage heat recovery and purification treatment of boiler tail gases are achieved, more importantly, the dismounting technology of the boiler induced draft fan is greatly improved, the problem that the boiler draft fan continuously and automatically locks under the load action and is not easy to dismount due to thread assembling can be effectively solved, and the two-stage heat recovery type cyclone dust removal coal-fired boiler is especially suitable for convenient dismounting after thread locking of large boiler draft fans.

The invention discloses a cyclone wet dust collection type coal-fired boiler with coil pipes connected in series. A high-temperature tail gas pipe of a boiler body is connected to an air induction fan through a water preheating coil pipe heat exchanger and a cyclone wet dust collector; a high-position soft water pool supplies water to the boiler after being preheated by a heat exchange coil pipe in a sewage pool and the water preheating coil pipe heat exchanger; threaded assembly is adopted between a belt pulley and a fan shaft of the air induction fan and between a fan impeller and the fan shaft of the air induction fan, and the thread rotation direction is the automatic locking direction along with working and bearing; the fan impeller is in threaded and rigid connection with the fan shaft after pressing a copper-plastic reversed composite pad; the belt pulley and the other end of the fan shaft are connected rigidly through a clamp part. According to the boiler, heat recovery and purification treatment of tail gas of the boiler are realized, the disassembly and assembly technology of the air induction fan of the boiler is greatly modified, the problems that the air induction fan of the boiler is continuously and automatically locked and is difficult to disassemble under the loading effect due to threaded assembly can be effectively solved, and large boiler fans can be disassembled conveniently and quickly after being locked in a threaded mode.

A crochet machine forming device, comprising a base, a hollow mandrel, a hollow forming head and a drive shaft; the mandrel is fixedly connected to the mandrel hole of the base, the drive shaft is dynamically connected to the drive shaft hole of the base, and the forming The head is plugged on the top of the mandrel and the top surface is a concave-convex surface; the above-mentioned mandrel is provided with an outer shaft, and a combined cam and an inner sleeve shaft are arranged between the mandrel and the outer shaft. The combined cam and the inner sleeve shaft are adjustable and connected, and the inner sleeve The shaft and the outer shaft are adjustable, and the cylindrical surface of the above-mentioned forming head and the cylindrical surface of the upper part of the mandrel are uniformly provided with axial grooves, and each axial groove of the forming head and the mandrel shaft below the axial groove A crochet needle is arranged in the slot, and the butt of the crochet needle is fixed on the combination cam; gears are respectively arranged on the transmission shaft and the outer shaft. When the metal wire passes through the forming head and the traction force is greater than the yield strength of the metal wire, the invention makes the mesh shape, and the softness and elasticity of the processed metal mesh pipe are greatly improved due to the existence of the mesh.

The invention discloses a heat pump type waste heat utilization inertial dust collection penetrating countercurrent drying machine. An exhaust hood of the drying machine is connected with an induced draught fan. The induced draught fan is evacuated after being connected with an evaporator of a heat pump system through a cyclone dust collector and a repeated back-turning baffle type inertial dust collector. The evaporator of the heat pump system is connected with a main machine through a refrigerant pipe. The main machine is connected with a condenser through a refrigerant pipe. The air outlet end of an air blower is connected in an air inlet hood through the condenser. Blades of an impeller of the induced draught fan are arranged to be in a radial shape and centrosymmetric about an impeller shaft in the radial direction, dust can be removed in time under the effect of centrifugal force, and safety accidents are avoided. The drying efficiency is improved, energy conservation and emission reduction are achieved, more importantly, a demounting and mounting technology of the induced draught fan is transformed to a great extent, when the induced draught fan is demounted, the pressure applied to the end face of a screw shaft shoulder by nut-like parts can be simply eliminated, the problem that the induced draught fan assembled in a threaded manner is automatically locked continuously under the effect of loads and cannot be easily demounted is effectively solved, the heat pump type waste heat utilization inertial dust collection penetrating countercurrent drying machine is particularly suitable for convenient demounting of large draught fans which are locked in a threaded manner, and effects are particularly obvious.