2425results about "Incrustation removal devices" patented technology

The present invention discloses a sintering production line, comprising: a kiln, a kiln car conveyor line, a material receiving device, a material feeding conveyor line and a bowl loading and unloading device. The kiln car conveyor line comprises a plurality of bowl-carrying kiln cars that circulate along a closed-loop conveying route. The conveying route comprises a sintering section and a loading and unloading section. The kiln is arranged in the sintering section for heating and sintering the sagger. The material receiving device is arranged on the upstream side of the loading and unloading section for collecting the sintering material. The material feeding conveyor line is arranged on the downstream side of the loading and unloading section for loading the empty sagger into the powder material to be sintered. The bowl loading and unloading device is used to move the sagger between the bowl-carrying kiln car, the material receiving device and the material feeding conveyor line. The sintering production line of the present invention has a high degree of automation, avoids the high-intensity operation of the staff in a harsh environment, and improves the efficiency.

The utility model provides a roasting device for graphite electrode production, which belongs to the field of graphite electrode processing equipment and comprises a roasting box and a filter plate slidably connected to the inner wall of the roasting box, an upper sliding groove and a lower sliding groove are formed in the side wall of the roasting box, and a group of upper sealing plates are slidably connected to the side wall of the roasting box through the upper sliding groove. A transparent plate is fixedly connected to the side wall of the upper sealing plate, a set of lower sealing plates are slidably connected to the side wall of the roasting box through lower sliding grooves, limiting blocks are fixedly connected to the bottom walls of the lower sealing plates, fixing bolts are in threaded connection with the inner walls of the limiting blocks, the ends, penetrating through the limiting blocks, of the fixing bolts are further in threaded connection with the roasting box, and evenly-distributed overturning rollers are rotationally connected to the inner wall of the roasting box. The inner wall of the roasting box is connected with a cleaning part used for cleaning the overturning roller, the outer surface of the overturning roller can be cleaned through a first cleaning ring and a second cleaning ring when the overturning roller rotates, the service life of equipment is prolonged conveniently, and meanwhile the heating uniformity of the graphite electrode is improved.

The invention is suitable for the technical field of advanced powder metallurgy and ceramic material sintering, and provides an assembly line type flash sintering system and a sintering method. The system comprises a powder loading and pre-pressing module, a first automatic graphite paper pressing, paving and replacing module, a sintering module, a demolding and sampling module and a second automatic graphite paper pressing, paving and replacing module which are sequentially arranged in the material flowing direction, all the modules are connected through the vacuum switching module to form a continuous vacuum environment; the system further comprises a conveying system which is used for driving the sintering units bearing materials to sequentially flow among the modules. The continuous flash sintering device is suitable for carrying out efficient and full-automatic continuous flash sintering treatment on powder materials in a vacuum or protective atmosphere environment, the platform overturning risk can be fundamentally avoided, and the stability and safety of the sintering process are ensured.

The invention discloses a sulfur dioxide preparation device and technology, and belongs to the technical field of sulfur dioxide preparation, the sulfur dioxide preparation device comprises a furnace body and an exhaust port formed in the top of the furnace body, a funnel-shaped combustion port is formed in the middle of the bottom of the furnace body, and a combustor is installed at the bottom end of the combustion port. The inverted-cone-shaped combustion table is arranged at the position, located over the combustion opening, of the bottom of the furnace body, the combustion groove is formed in the top of the inverted-cone-shaped combustion table, then flame is guided towards the top of the inverted-cone-shaped combustion table through the annular shielding plate, and then the flame is guided to the top of the inverted-cone-shaped combustion table in cooperation with the conical cover and the leakage hole in the top of the conical cover; and when sulfur raw materials fall into the top of the inverted-cone-shaped combustion table through the conical cover, due to the fact that the inverted-cone-shaped combustion table and the conical cover are heated to be in a high-temperature state, the solid raw materials can be directly heated to be in a liquid state, then combustion reaction is conducted, and the functionality of the device is improved. The preparation rate of sulfur dioxide is improved, and the practicability is higher.

The invention relates to the technical field of metal smelting equipment, in particular to a hearth cleaning device of a vacuum consumable electric arc furnace, which comprises a mounting seat, a driving unit, a lifting mechanism and a hearth cleaning assembly, the driving unit is arranged on the mounting seat and is used for driving the lifting mechanism to rotate, and the lifting end of the lifting mechanism is connected with the hearth cleaning assembly; the chamber cleaning assembly comprises an opening mechanism and a plurality of arc-shaped plates, the arc-shaped plates are arranged at intervals in the circumferential direction of the lifting end of the lifting mechanism, arc-shaped grooves are formed in the bottoms of the inner walls of the arc-shaped plates in the circumferential direction, sliding seats are slidably connected into the arc-shaped grooves, elastic pieces are connected between the sliding seats and the two end faces in the arc-shaped grooves, and cleaning scrapers are arranged on the outer walls of the arc-shaped plates. A telescopic rod is connected between the top of the inner wall of the arc-shaped plate and the lifting end of the lifting mechanism. The opening mechanism is used for opening the arc-shaped plates so that the cleaning scraper can make contact with the inner wall of the hearth. The cleaning scraper is impacted in a force storage mode, and impurities are shoveled away.

The invention discloses direct-current plasma furnace smelting equipment for metal waste slag, and relates to the technical field of metal waste slag treatment.The direct-current plasma furnace smelting equipment comprises a machining mechanism, a lifting mechanism for moving an electrode is arranged on the side face of the machining mechanism, and a cleaning mechanism for cleaning the electrode is arranged on the side, close to the lifting mechanism, of the upper surface of the machining mechanism; according to the device, the cleaning mechanism is arranged to clean the outer surface of the pole, so that the situation that slag is accumulated on the outer surface of the pole, and the conductivity and the smelting efficiency of the pole are affected is avoided; and a discharging opening and a feeding opening of the discharging box are sealed through the discharging mechanism, harmful gas generated by smelting is prevented from being discharged through the discharging opening and the feeding opening, cleaned slag is discharged through a rotating pipe and a pushing rod, and the slag is discharged out of the cleaning box through a slope formed by an inclined plate.

The large valve casting casting device comprises a workbench, a working plate is arranged above the workbench, and the two sides of the top end of the working plate are each provided with a pair of sliding bases. In the prior art, when molten metal in a casting furnace is poured into a pouring opening of a mold, distance control and rotation of a furnace body need to be considered, and once the control of the factors is not accurate, the molten metal in the casting furnace is prone to being sprayed out of the furnace body and the pouring opening of the mold; and on one hand, the valve casting efficiency of the device is reduced, and on the other hand, the problem that workers are scalded easily due to splashing of scattered molten metal is solved. The device has the advantages that the possibility that molten metal in the furnace body is sprayed out of the guide funnel is reduced, it is ensured that more molten metal flows into the guide funnel, the casting efficiency of the device is guaranteed, and meanwhile the safety of using the device by workers can be improved.

The automatic ash removal equipment comprises a furnace body, a furnace bottom plate is arranged below the furnace body, a waste discharge port used for discharging dust or waste gas in the furnace body is formed in the furnace bottom plate, an ash removal device is arranged on one side of the waste discharge port, and an ash removal device is arranged on the other side of the waste discharge port. The ash removal device partially extends into the waste discharge port to automatically clean accumulated ash on the inner wall during ash removal, and after ash removal is completed, the ash removal device is separated from the waste discharge port, so that dust or waste gas can be discharged from the waste discharge port. When the ash cleaning device of the automatic ash cleaning equipment is used for cleaning ash, the ash cleaning device can extend into the waste discharge port to automatically clean accumulated ash on the inner wall of the waste discharge port on the furnace bottom plate, so that the influence on the growth quality of monocrystalline silicon and the environment in the furnace chamber due to blockage caused by dust accumulation on the inner wall of the waste discharge port is avoided; and after dust removal is completed, the dust can be separated from the waste discharge port, so that the dust removal effect of the dust removal device is prevented from being influenced by dust accumulation at the waste discharge port for a long time.

The invention discloses a coking inhibitor and a preparation method thereof. The coking inhibitor comprises a reducing agent, a sulfur-containing substance, a silicon-containing substance and a calcium-containing substance, and the valence of the sulfur element in the sulfur-containing substance is negative bivalence or zero valence. Therefore, by adopting the coking inhibitor provided by the invention, the melting point of the coking body can be reduced, the coking body is promoted to be melted, and the occurrence of a coking phenomenon is favorably inhibited.

The invention is suitable for the technical field of powder metallurgy and advanced ceramic material sintering equipment, and provides an integrated flash sintering device for vacuum and a sintering method. The device comprises a power supply module, a high vacuum module, a first servo hydraulic machine, a second servo hydraulic machine, a third servo hydraulic machine, a mold rotation switching module, a vacuum feeding module, a green body pressing module, a demolding and mold cleaning module and a mold transfer module. According to the invention, an integrated gear tray design is adopted to integrate the functions of die installation, graphite paper treatment and green body pressing, and online synchronous cleaning of an electrode and a die is realized through die fixation and a cleaning brush arranged in a cleaning drum; therefore, full-automatic, high-efficiency and high-stability continuous production of flash sintering from powder filling to finished product collection is realized.

The utility model discloses a rapid cooling device for a graphitization furnace, which is applied to the graphitization furnace and comprises a protective box, the inner wall of the protective box is fixedly connected with the graphitization furnace, the top wall of the protective box is fixedly connected with a water tank, an electric pump is mounted in the water tank, a water suction pipe is mounted on the side wall of the electric pump, and a water outlet pipe is fixedly mounted on the other side wall of the electric pump. The bottom end of the water outlet pipe penetrates through the protection box and extends downwards, the bottom end of the water outlet pipe is fixedly connected with a spiral pipe, and the spiral pipe is arranged on the outer wall of the graphitization furnace in a surrounding mode. The stirring rods drive the vertical rods to rotate, the multiple sets of stirring rods rotate, the material mixing effect is better, the inner wall of the graphitization furnace is cleaned by arranging the supporting rods in cooperation with the scraping plates, it is avoided that impurities are accumulated on the inner wall of the graphitization furnace, the heat dissipation effect of the graphitization furnace is affected, and the heat dissipation effect of the graphitization furnace is better.

The invention relates to the technical field of furnace kiln smelting, and discloses an automatic chute heat preservation anti-coking system, method and device.The method comprises the steps that a plurality of temperature collecting devices are arranged in a groove of a refractory material layer on the back face of a chute, the temperature collecting devices are used for measuring the temperature of the wall face area of the chute, and analog signals are obtained; the analog signal is converted into a digital signal to be output; when the temperature value of a certain area of the chute is lower than a critical value, heating elements of two adjacent parts of the certain area are started for heating; the flow of the high-temperature melt in the chute is obtained, whether coking is generated in an area in the chute or not is judged, and coordinates of the area where the coking is generated are sent to the intelligent feedback assembly; and the automatic decoking device is used for decoking the coking area. The system comprises a temperature monitoring assembly, a heating and heat preservation assembly, a visual coking monitoring assembly, an automatic coking clearing assembly and an intelligent feedback assembly. According to the invention, automation and intelligence of anti-coking of the chute are realized; and manual decoking operation is not needed.

A furnace cleaning device for a continuous graphitization and purification furnace, the furnace cleaning device comprising a graphite supporting plate and a sweeper which are arranged in a lower barrel, wherein the graphite supporting plate is connected to the lower bottom face of a bottomless crucible at the very bottom of a crucible group, and the sweeper is arranged in the bottomless crucible and is in transmission connection with a graphite transmission shaft; and the sweeper is driven by the graphite transmission shaft to rotate so as to scrape and sweep the inner wall of the bottomless crucible and the upper surface of the graphite supporting plate, such that materials fall out of a discharging hole, and scale adhering to the inner wall of the bottomless crucible and the upper surface of the graphite supporting plate is removed. Thus, scale in the furnace can be removed in time, non-production time such as for a furnace shutdown and furnace dismantling is shortened, the production efficiency is improved, and the energy consumption is reduced.

The invention discloses stainless steel production waste gas treatment equipment, and belongs to the technical field of waste gas treatment.The stainless steel production waste gas treatment equipment comprises a supporting table, a condensing box is assembled at the top end of the supporting table, a waste gas treatment box is assembled on the side face of the supporting table, and a partition plate is fixedly connected into the waste gas treatment box; and the side face of the condensation box is connected with a first condensation pipe through a water pump, the interior of the first condensation pipe communicates with three sets of second condensation pipes, the interior of the waste gas treatment box is fixedly connected with a filter plate, and the side face of a partition plate is fixedly connected with a motor through an L-shaped support plate. Through mutual cooperation of the filter plate, the water pump, the condenser pipe I, the motor, the screw rod I, the moving seat, universal shafts, a connecting rope, a condenser pipe II, a connecting rod I, a wiping block and a connecting rod II, the screw rod I rotates to drive the moving seat to slide, and meanwhile, through cooperation of the universal shafts and the connecting ropes, the wiping block synchronously moves along with the moving seat.

The invention discloses steelmaking flue gas recovery and waste heat utilization equipment and a use method, and relates to the technical field of flue gas waste heat recovery. Dust in the steelmaking flue gas can be filtered through the filter cartridge before the flue gas enters the heat exchange mechanism, and then the clean flue gas is conveyed into the heat exchange mechanism, so that the inner wall of the heat exchange barrel can be kept in a clean state all the time, the dust in the steelmaking flue gas is prevented from being attached to the inner wall of the heat exchange barrel, heat transfer is prevented from being hindered, and the service life of the steelmaking flue gas is prolonged. The smoke dust scraping assembly can scrape off smoke dust attached to the inner wall of the filter cartridge, the self-cleaning effect can be achieved while the heat of the steelmaking smoke gas is recycled, and therefore the good filtering effect of the filter cartridge is always kept, and the scraped-off smoke dust can be collected in a centralized mode under pushing of an auger. When high-temperature flue gas passes through the heat exchange assemblies, the heat exchange assemblies can rotate around the axes of the heat exchange assemblies, so that surrounding clear water is disturbed, clear water at different positions is stirred and mixed, and water temperature areas at different positions are consistent.

The invention discloses a vacuum consumable electric arc furnace with a hearth cleaning function, and relates to the technical field of electric arc furnaces, the vacuum consumable electric arc furnace comprises a mounting plate, a scraping part and a scrubbing part, a main pipe rotates to drive an arc-shaped scraper knife to rotate, various residual impurities on the inner wall of a hearth are scraped, and when the arc-shaped scraper knife makes contact with harder or large impurities, the arc-shaped scraper knife is driven to rotate. At the moment, an arc-shaped scraper knife extrudes a first spring, the collision force between the arc-shaped scraper knife and hard impurities is reduced through the first spring, a coating on the inner wall of the hearth is prevented from being damaged, a movable piston is pushed to move through a movable rod, liquid in a liquid storage cavity is extruded, and the liquid enters a blocking cavity through a connecting pipe and pushes a blocking piston to move; the through hole is aligned with the flow channel in the connecting rod, at the moment, the cleaning liquid enters the inclined nozzle through the flow channel in the connecting rod and is directly sprayed to the position where the arc-shaped scraper knife makes contact with the hard impurities, the hard impurities are independently further softened and diluted, the hard impurities are conveniently shoveled away by the arc-shaped scraper knife, and the cleaning efficiency is improved.

The invention provides a combustion-supporting air preheating device for an annealing furnace, and relates to the technical field of air preheating combustion-supporting equipment, the combustion-supporting air preheating device comprises a preheating box, and a plurality of rows of preheating pipes are fixedly connected in the preheating box; a threaded propeller shaft is rotationally arranged in the preheating box and close to the leeward side of the preheating pipe, and a longitudinal guide shaft is welded in parallel in the preheating box and close to the threaded propeller shaft; the preheating pipe is sleeved with a retaining ring in a sliding mode, a gear ring is rotationally installed on the retaining ring, a retaining ring is welded to the gear ring, a small annular steel wire brush and a large annular steel wire brush are fixed to the inner circumference and the outer circumference of the retaining ring respectively, and brush wires on the annular steel wire brush on the inner side are evenly distributed on the inner circumference of a supporting ring of the retaining ring. Brush wires on the annular steel wire brush on the outer side are uniformly distributed on the periphery of a supporting ring of the annular steel wire brush; according to the preheating device, the trouble that the preheating device needs to be greatly disassembled to expose the preheating pipe, and then the preheating pipe can be cleaned can be omitted, and operation and use are easy, convenient and efficient.

The invention discloses a graphitization furnace convenient to clean, and relates to the field of graphitization furnaces, the graphitization furnace comprises a bottom plate, a pair of vertical plates and a furnace body; the vertical plates are fixedly installed on the bottom plate, the furnace body is rotatably installed between the vertical plates, an annular cover is installed in the furnace body, a straight gear ring is rotatably installed in the annular cover, a first motor is fixedly installed on the side wall of the furnace body, and a driving bevel gear is fixedly installed at the driving end of the first motor. A driven bevel gear meshed with the driving bevel gear is rotatably mounted in the annular cover, a straight gear meshed with the straight gear ring is fixedly mounted on the driven bevel gear, a mounting rod is mounted on the straight gear ring, and a scraping plate is mounted on the mounting rod. If the cleaning is not performed, the graphitization effect of the graphitization furnace can be influenced, and if the manual cleaning is performed, time and labor are wasted, so that the subsequent graphitization efficiency is influenced.

The invention relates to the technical field of graphite electrode production, in particular to a roasting device for graphite electrode production and a roasting method.The roasting device comprises a roasting box, a sieve plate and a plurality of rotating rollers, a plurality of connecting plates corresponding to the rotating rollers are horizontally arranged in the roasting box in a sliding mode, the rotating rollers are embedded and rotationally connected to the connecting plates, and a through opening is formed in the roasting box; the end part of the rotating roller penetrates through the through hole and extends to the outer side of the roasting box, and a pair of arc-shaped scraping plates is arranged on the outer side wall of the rotating roller; and the scraping assembly drives a plurality of pairs of arc-shaped scraping plates to synchronously scrape residues on the outer side wall of the rotating roller. Compared with roasting in the prior art, by arranging the sliding assembly, the rotating assembly and other parts, the distance between the rotating rollers can be adjusted, and the graphite electrode roasting device is suitable for graphite electrodes of different thicknesses. The rotating roller can rotate to drive the electrode to roll, so that uniform roasting is ensured. During roasting or after roasting is finished, the scraping assembly can clean residues on the rotating roller.

The utility model belongs to the technical field of aluminum processing, and discloses a drossing slag body collecting device which comprises a fixed frame fixed at the upper end of a smelting furnace, the lower end of the fixing frame is provided with a rotating block located in the smelting furnace and coaxial with the smelting furnace. A plurality of vertically-placed first battens are fixed to the circumferential wall of the rotating block and annularly and evenly distributed around the central axis of the rotating block, second battens are fixed to the lower ends of one side faces of the first battens, and the second battens are obliquely and upwards placed from the side close to the first battens to the side away from the first battens. The uppermost end of the second batten is lower than the uppermost end of the first batten, one end of the first batten and one end of the second batten are attached to the peripheral wall of the rotating block, and the ends, away from the rotating block, of the first batten and the second batten are attached to the peripheral wall of the inner side of the smelting furnace. Floating waste residues on the liquid surface can be quickly gathered, the gathered waste residues are automatically discharged out of the liquid surface to be collected, and the working efficiency of slagging-off and residue collection is improved.

The utility model provides a bearing device for battery piece processing and a laser-induced sintering processing device.The bearing device comprises a rotary table module, the rotary table module comprises a rotary driving mechanism, a supporting frame and a plurality of bearing tables, the bearing device further comprises a sweeping module, and the sweeping module comprises a long-strip-shaped brush; the rotary table module is at least provided with a machining station, a feeding station and a discharging station, the feeding station and the discharging station are adjacently arranged, and the brush is arranged between the feeding station and the discharging station and extends in the center direction of the supporting frame. The rotary driving mechanism drives the multiple bearing tables to sequentially and circularly pass through the feeding station, the machining station and the discharging station, and in the process that the bearing tables move to the feeding station from the discharging station, the brushes clean the table tops of the bearing tables. The brush is arranged between the feeding station and the discharging station, so that the brush cleans the bearing table in the process that the battery pieces on the bearing table are taken away and return to the feeding station without load, the working efficiency is improved, and the cleaning effect is better.

The utility model discloses an automatic soot blower for a calcining furnace. The automatic soot blower comprises an automatic driving module, a special-shaped telescopic module, a blowing pipe gun module, a high-temperature flue gas collecting module and a control module, the automatic driving module drives the special-shaped telescopic module to move transversely, the special-shaped telescopic module drives the blowing pipe gun module to stretch out and draw back longitudinally so as to stretch into the calcining furnace to blow ash, and the high-temperature flue gas collecting module can collect accumulated ash falling off from the calcining furnace and provide steam for the blowing pipe gun module. The device can replace manual work to clean ash deposition in the flame path of the calcining furnace, so that the labor intensity of workers is reduced.

The invention relates to the technical field of rotary kiln processes, and provides a method for reducing nodulation in a lime rotary kiln, which comprises the following steps: S1, raw material pretreatment; s2, controlling the environment in the kiln; s3, optimizing the structural design of the kiln body; and S4, cleaning and maintaining in the kiln. According to the technical scheme, through the process steps of proportioning the raw materials, calculating the calcining temperature in a kiln, adjusting the stockline of a cooler to be 1.5 m, starting to discharge ash, and ending when the stockline of the cooler is 0.5 m, the CaO range of block ash is reduced by 11.44%, the SiO2 range is reduced by 1.52%, the activity range is reduced by 94.88 ml, the CaO range of surface ash is reduced by 6.95%, the SiO2 range is reduced by 0.54%, and the activity range is reduced by 100 ml; the data verifies that the quality of the finished product ash subjected to multi-fuel combustion in the rotary kiln is relatively stable after the new method is adopted.

As discussed earlier, accretion happens to be the most critical problem faced by users of the rotary kiln as it leads to shutdown of the rotary kiln which ultimately leads to reduction in production. Currently available accretion monitoring systems require expensive equipment and sensors which increases the production cost. Present disclosure provides method and system for monitoring accretion happening inside the rotary kiln. The system first takes real-time data associated with a rotary kiln as input. The system then localizes accretion clusters present in the rotary kiln using an accretion localization model. Thereafter, the system estimates the accretion probability score based on the HTM statistics calculated based on the accretion cluster information and real-time data using an accretion scoring model. Further, the system compute accretion score representative of real-time accretion condition of the rotary kiln based on the accretion probability score and the inputs.

The invention discloses an electric furnace tail gas recovery heat exchange heating device, belongs to the technical field of tail gas treatment, and aims to solve the problems that the contact time of tail gas and a spiral water pipe is short, heat energy in the tail gas cannot be fully transmitted to a medium in the spiral water pipe, and the waste heat recovery efficiency is reduced. The electric furnace tail gas recovery heat exchange heating device comprises a device body, a gas inlet pipeline is arranged in the device body, a gas outlet pipeline is arranged on the side wall of the end, away from the gas inlet pipeline, of the device body, a pump is fixedly installed at the upper end of the device body, a heat preservation cavity is formed in the device body and communicates with the gas inlet pipeline, and a flow dividing cover is fixedly installed in the heat preservation cavity. According to the tail gas heat recovery device, heat in tail gas can be fully recovered and utilized, energy waste is reduced, the production cost is reduced, meanwhile, particle impurities in the tail gas can be removed, the phenomena of dust deposition and blockage in equipment are reduced, the maintenance cost of the equipment is reduced, and the heat exchange efficiency is improved.

The utility model provides a novel furnace cover structure for a refining furnace, which comprises a furnace cover body, the furnace cover body comprises an upper conical section and a lower cylindrical section, an annular connecting plate is arranged in the middle of the conical section, and a plurality of air blowpipes which are uniformly distributed around the center of the connecting plate are arranged on the connecting plate. The air blowing pipe penetrates through the connecting plate, the end of the air blowing pipe extends towards the interior of the conical section, a plurality of air blowing holes are formed in the circumferential direction of the air blowing pipe, and high-pressure air can be sprayed out towards the inner wall of the conical section through the air blowing holes of the air blowing pipe, so that the inner wall of the furnace cover is cleaned; the furnace cover is reasonable in design structure and convenient to use, the blowing pipe capable of introducing high-pressure air is designed on the furnace cover, after the furnace cover is used for a period of time, dust and other impurities attached to and deposited on the inner wall of the furnace cover can be cleaned through the high-pressure air, and the situation that the cooling efficiency is reduced due to the dust and other impurities is avoided.

The utility model discloses a sintering tail gas waste heat utilization device, which belongs to the technical field of waste heat utilization and comprises a heat exchange box, support legs are symmetrically and fixedly connected to four corners of the bottom of the heat exchange box, and a box cover is mounted at an opening in the top of the heat exchange box; according to the device, sintering tail gas enters the heat exchange box through the first tail gas pipe and then is exhausted from the second tail gas pipe after passing through the heat exchange pipe, meanwhile, fresh air passes through the interior of the heat exchange box through the first fresh air pipe and the second fresh air pipe, heat exchange is conducted on the tail gas and the fresh air through the heat exchange pipe, and the fresh air is heated through the tail gas; and when the tail gas flows in the heat exchange pipe, the fan blades are driven to rotate, the fan blades drive the scraping plate to rotate through the rotating shaft, smoke dust attached to the inner wall of the heat exchange pipe is cleaned through the scraping plate, and the situation that the smoke dust is attached to the inner wall of the heat exchange pipe, and consequently the heat exchange efficiency of the heat exchange pipe is reduced is avoided.

The embodiment of the invention relates to a production process and device for secondary zinc oxide calcine, and belongs to the technical field of zinc calcine production. According to the production process and device of the secondary zinc oxide calcine, the device comprises a hollow decomposing furnace, the bottom of the decomposing furnace is connected with a rotary kiln, the upper end of the decomposing furnace is connected with a three-way pipe valve, the upper end and the lower end of the decomposing furnace are closed up, a combustor is installed at the lower end of the decomposing furnace, and one end of the three-way pipe valve is connected with a fifth calcining cyclone; the other end of the three-way pipe valve is connected with a carbonization furnace outer pipe, a plurality of carbonization smoke pipes are installed in a smoke pipe of the carbonization furnace, the upper portion of the end, away from the fifth calcining cyclone, of the three-way pipe valve is communicated with the tangent line of the carbonization furnace outer pipe, and the other ends of the carbonization pipes are communicated with the lower end of the decomposing furnace. The device has the effect of reducing the production cost, the flue gas in the process of producing the secondary zinc oxide by the rotary kiln is used as a heat source, and the secondary zinc oxide is calcined by the multi-stage calcining cyclone to obtain the product zinc calcine.

The invention relates to the technical field of metal heat treatment, in particular to a heat treatment furnace waste heat recovery device for low-temperature ductile Ni-Mo-Cr series steel, which comprises a shell and further comprises a cleaning mechanism arranged in the inner wall of the shell; the filtering mechanism is arranged in the inner wall of the shell; the cleaning opening is formed in the outer wall of the bottom end of the shell; the heat exchange pipe is fixedly connected into the inner wall of the shell, and the outer wall of the shell is fixedly connected with an air inlet pipe; wherein the cleaning mechanism comprises a motor, and an output shaft of the motor is fixedly connected with a reciprocating screw rod; the filtering mechanism comprises a filter screen, and the inner wall of the filter screen is connected with a convex block in a sliding manner; the outer wall of the reciprocating screw rod is in threaded connection with a moving block; through the arrangement of the cleaning mechanism, an operator does not need to manually clean impurities in the filter screen and the shell, the working intensity is relieved, and the efficiency of maintaining the interior of the shell is also improved.

The electric furnace for steel rolling comprises a bottom plate, an electric furnace body and an exhaust pipe inserted into the top face of the electric furnace body, a filter plate is movably arranged in the exhaust pipe, and a cleaning mechanism is arranged on the surface of the filter plate; the cleaning mechanism comprises a sleeve rotationally arranged in the filter plate, a rotating rod is arranged in the sleeve, a fixing block is fixedly arranged at the bottom end of the rotating rod, scrapers are fixedly arranged on the two sides of the fixing block through connecting rods, and a scraping plate is fixedly arranged on the top surface of each connecting rod through a supporting rod. The invention relates to the technical field of electric furnaces. According to the electric furnace for steel rolling, through the arrangement of the cleaning mechanism, dust and other residues attached to the surface of the filter plate and the inner wall of the exhaust pipe can be scraped and cleaned, manual cleaning by personnel is not needed, the working intensity is relieved, the situation that the circulation speed of waste gas is affected due to residue accumulation can be avoided, and the subsequent heat recovery work of high-temperature waste gas is accelerated.