116results about How to "Speed up the slide" patented technology

The invention discloses a waterproof electric power cabinet capable of carrying out heat dissipation easily. The electric power cabinet comprises a slide rail, a left rain board, a telescoping rod, a right rain board and a cabinet body. A bottom of the cabinet body is fixedly installed with a mounting seat. An inner portion of the mounting seat is symmetrically provided with a master-slave gear and a driven gear. The master-slave gear and the driven gear are meshed with each other, and the master-slave gear and the driven gear are fixedly installed with supporting rods. Bottoms of the supporting rods are hinged to sliding blocks, and a left baffle and a right baffle are fixedly arranged on the two sliding blocks respectively. The left rain board and the right rain board are fixedly installed with rain detection devices, and the rain detection devices control and are connected to a rotation motor. In the invention, during a raining day, the supporting rods, the baffles and the rain boards are folded towards a middle portion so as to speed up rainwater slide, block heat dissipation holes and keep the cabinet body away from the ground to prevent the cabinet body from damp; and during a sunny day, the supporting rods, the baffles and the rain boards are unfolded towards two sides so as to expose the heat dissipation holes and improve a heat dissipation effect.

The invention relates to an anti-icing cable applicable to ice rain atrocious weather and matched auxiliary facilities with anti-icing property. The anti-icing cable of the invention is characterized in that the cable is sleeved with an anti-icing sleeve, a clearance is reserved between the inner surface of the anti-icing sleeve and the surface of the cable, and the anti-icing sleeve can rotate relative to the cable. An insulating bottle for field power transmission is characterized in that the easy-icing surface of the insulating bottle is provided with the anti-icing sleeve. An anti-icing field metal tower body is characterized in that the surface of an easy-icing part of the tower body is provided with an anti-icing element. A method for arranging the anti-icing sleeve or the anti-icing element on the easy-icing part of the cable, the insulating bottle or the tower body effectively prevents the surface from icing, greatly reduces the heat exchange with the outside, and effectively prevents the icing phenomenon caused by heat absorption after rainwater is directly contacted with the cable, the insulating bottle or the tower body.

The invention relates to a smooth feeding door frame assembly for a forklift and a forklift applying the smooth feeding door frame assembly. The assembly comprises a primary material discharging mechanism and a secondary material discharging mechanism, wherein the primary material discharging mechanism comprises a driving component, a first pushing component and a second pushing component, whereinthe driving component is fixedly arranged at the middle position of a lifting frame, the first pushing component and the second pushing component are symmetrically arranged on the two sides of the driving component and are arranged on the lifting frame in a sliding mode, and the driving component cooperates with the first pushing component and the second pushing component to carry out primary unloading; the secondary material discharging mechanism comprises a first feeding component and a second feeding component, wherein the first feeding component is arranged at the lower part of the firstpushing component and is located at the rear half part of a cargo material conveying direction, and the second pushing component is arranged at the lower part of the second pushing component and is located at the rear half part of the cargo material conveying direction; and the first feeding component and the second feeding component are both arranged in a telescopic mode along the horizontal conveying direction of a cargo material. According to the assembly, the problem that the bottom surface of a panel is obliquely arranged, when the cargo is slid and sent to a destination, the cargo with heavier weight can be overturned due to the fact that the ground is firstly contacted with one side of the bottom surface of the cargo is solved.

The invention discloses a building damping roof structure. The building damping roof structure comprises a bottom plate, wherein a lower supporting column is fixedly arranged on the bottom plate, a first damping spring is connected between a protruding part and an inwards-concave part, an upper supporting column is fixed to the bottom of a ridge plate, roof plates are fixedly arranged on sphericalconnecting pieces, and vibration sensors are arranged on the sides, close to the bottom plate, of the roof plates; connecting ropes are connected to the sides, away from second damping springs, of pressing plates; ejector rods are fixedly arranged on the sides, close to outlets, of movable plates, first electromagnetic chucks are fixedly arranged at the ends, away from the ejector rods, of the movable plates, and second electromagnetic chucks are fixedly arranged at the bottoms of inner cavities of operation boxes. The building damping roof structure is provided and can perform buffering damping on the vibration of the ridge plate and the vibration of the roof plates correspondingly, can use the damping structures to promote decomposition and sliding of accumulated snow on the roof plates, avoids damage to the roof plates, and is concentrated in function, convenient to use and quite worthy of popularization.

The invention relates to the technical field of screening equipment, in particular to a screening mechanism with adjustable screening hole size. The screening mechanism comprises a support frame, a differential speed assembly, a driving centrifugal assembly, an inner screen barrel, an outer screen barrel, an auxiliary frame, an adjusting assembly, a pushing assembly, a solid-liquid separation assembly and a water spraying assembly, the pushing assembly rotates to drive the adjusting assembly to rotate, the adjusting assembly rotates to drive the outer screen barrel to rotate, the coincidence degree of a plurality of large outer screen holes and a plurality of inner screen holes is adjusted, the coincidence degree of a plurality of small outer screen holes and a plurality of inner screen holes can be adjusted, substances can be separated and screened in different sizes, the substances to be screened can be screened at a certain speed by driving the centrifugal assembly, the centrifugalassembly is cooperatively driven to drive the outer screen barrel to rotate through the differential assembly, the outer screen barrel drives the inner screen barrel to rotate through the adjusting assembly, substances to be screened penetrate through overlapped screen holes in the inner screen barrel and the outer screen barrel to be separated and screened in size under movement, and the purposeof rapidly screening the screened substances is achieved.

The invention belongs to the technical field of straw carbonization equipment, and in particular relates to a crop straw carbonization system. The crop straw carbonization system includes a push box,a motor, an auger, a carbonization box, a fire spraying module, a partition, a collection cover and a carbon outlet, wherein a feed hopper is arranged on the push box, and the feed hopper is located at the right upper side of the push box; the motor is installed on the right side of the push box; the auger is located in the push box, one end of the auger is rotatably connected onto the right sidewall of the push box, and the other end of the auger is connected with the output shaft of the motor; the push box is also provided with a discharge port, and the discharge port is located at the leftlower side of the push box; the carbonization box is located under the push box; the fire spraying module is located on the side wall of the carbonization box; the partition is installed in the carbonization box, the partition is located below the fire spraying module, and the middle of the partition is provided with a through hole; the collecting cover is located in the carbonization box, the upper end of the collecting cover is connected with the bottom of the partition, the collecting cover communicates with the through hole in the partition, and the lower end of the collecting cover is installed at the bottom surface of the carbonization box; and the carbon outlet is located at the bottom of the carbonization box, and the carbon outlet communicates with the collecting cover.

The invention relates to the technical field of food packing, and discloses food packing equipment. The food packing equipment comprises a rack, a conveying belt and a quantifying mechanism, wherein the quantifying mechanism comprises a stirring box and a motor; a rotating shaft is arranged in the stirring box and is provided with slide ways; a stirring shaft is arranged in each slide way; a permanent magnet is fixed on each stirring shaft; electromagnets are fixed on two side walls of the stirring box; a long iron rod is arranged on a side wall of the stirring box; a short iron rod is arranged on another side wall of the stirring box; a first air bag is arranged below the long iron rod; a second air bag is arranged below the short iron rod; the bottom of the stirring box communicates witha discharging tube; the upper portion of the discharging tube is slidably connected with a second closing plate; the lower portion of the discharging tube is slidably connected with a first closing plate; the conveying belt is positioned below the discharging tube and is mounted on the rack; and the conveying belt is in intermittent transmission through a geneva mechanism. The food packing equipment is simple in structure, and can quantify food required to be packed, and the conveying belt intermittently conveys packing bags.

The invention discloses an external integrated filtering system for aquaculture equipment, and relates to the technical field of filtering. The system comprises a box body, a water pump is fixedly arranged at the top of the box body, a water pipe is fixedly arranged on one side of the water pump, a water injection tank is fixedly arranged at one end of the water pipe, a water pipe is fixedly arranged on the other side of the water pump, a flow dividing pipe is fixedly arranged at the other end of the water pipe, and a spray head is fixedly arranged at the bottom of the flow dividing pipe, a filter plate is movably arranged in the box body, shaking boxes are fixedly arranged on the two sides of the inner wall of the box body, motors are fixedly arranged in the shaking boxes, output shafts of the motors are fixedly connected with rotating shafts, and by arranging shaking rods, residues blocked in filter screen holes can be shaken off through vertical movement of the shaking rods; therefore, the cleaning effect is achieved, the sliding speed of residues on the top of the filter plate is increased, and the residue collecting efficiency is improved.

The invention discloses a soil remediation device for ecological environmental protection engineering and a remediation method thereof, and relates to the technical field of soil remediation devices.In order to pretreat soil before remediation and improve the remediation effect of a remediation agent on the soil conveniently, the soil remediation device specifically comprises a shell, a crushingassembly and a stirring assembly, a supporting plate is welded to the inner wall of one side of the shell, a base is welded to the outer wall of the top of the supporting plate, two lead screw slidingtable assemblies are fixed to the outer wall of the top of the supporting plate through bolts, first fixing frames are fixed to the sliding ends of the two lead screw sliding table assemblies throughbolts correspondingly, connecting rods are rotatably connected to the inner walls of the two first fixing frames through rotating shafts correspondingly, a filtering box is connected to the outer wall of the top of the base through a hinge, and two second fixing frames are fixed to the outer wall of the bottom of the filtering box through bolts. By arranging a first electric push rod and a pressing plate, soil can be extruded through external force, and a filtering plate can increase the filtering rate of large particles such as stones in the soil.

The invention relates to an automatic sorting and processing assembly line of a logistics warehouse. The automatic sorting and processing assembly line of the logistics warehouse comprises a sorting device and conveying and stacking devices, wherein the conveying and stacking devices are symmetrically arranged front and back on the left side of the sorting device, and the lower ends of the sortingdevice and the conveying and stacking devices are arranged on the existing working ground. According to the design concept of the sorting-stacking integrated structure, automatic sorting of goods inthe logistics warehouse is carried out, the adopted sorting device can be used for screening different specification types of packages in a uniform shape integrally, the screened goods can be rapidlytransported and stacked by the aid of the arranged conveying and stacking devices, and compared with a traditional manual sorting and arranging mode, the automatic cooperation operation mode between the sorting device and the conveying and stacking devices greatly improves working efficiency.

The invention discloses a rainfall collecting device for park and garden construction. The rainfall collecting device comprises a water collecting barrel; a water collecting funnel is arranged on theouter wall of the top of the water collecting barrel; a filtering otter board is connected with the top of the inner wall of the circumference of the water collecting funnel through a spring; the topouter wall of the filtering otter board takes an arc shaped structure; a water inlet is formed in the circle center of the top outer wall of the water collecting barrel; the opening position of the water inlet is corresponding to the bottom opening position of the water collecting funnel; a splitter plate is arranged on the top of the inner wall of the circumference of the water collecting barrel;diffluence holes are uniformly formed in the top outer wall of the splitter plate; and a filtering net cage is arranged on the top of the inner wall of the circumference of the water collecting barrel. When the rainfall collecting device is used, the filtering otter board filters rainwater, the filtered impurities can slide along the top outer wall of the filtering otter board to prevent the impurities from blocking mesh openings to avoid influence to rainwater collection; the splitter plate distributes rainwater flowing into the water collecting barrel, so that the rainwater uniformly flowsinto the filtering net cage to ensure uniform utilization of activated carbon particles.

The invention relates to the technical field of environmental protection, and discloses an environment-friendly wastewater filtering device. The device comprises a box body, an inlet is formed in the top of the box body, an outlet is formed in the bottom of the box body, a drawing block is slidably connected to the interior of the box body, a motor is fixedly connected to the top of the inner wall of the box body, and a rotating rod A is fixedly connected to one end of the motor. And a filter screen vibration sliding mechanism is arranged in the box body. By arranging the filter screen vibration sliding mechanism, a filter screen fixing frame drives an internal filter screen to continuously lift and vibrate in the box body, so that residues blocked on the surface of the filter screen during long-term filtration of wastewater are vibrated to slide into the drawing block through vibration, the sliding speed of the residues into the drawing block is further increased, and the long-term water passing filtering efficiency of the filter screen is ensured; and by arranging a scraping mechanism, stains which are attached to the working surface and cannot be cleaned due to vibration are effectively filtered for a long time.

The invention relates to an anti-icing cable applicable to ice rain atrocious weather and matched auxiliary facilities with anti-icing property. An anti-icing field metal tower body is characterized in that the surface of an easy-icing part of the tower body is provided with an anti-icing element; and the anti-icing element is arranged on rod and column surfaces consisting of the tower body by means of clamping, covering, coating or adhering. A method for arranging the anti-icing sleeve or the anti-icing element on the easy-icing part of the tower body effectively prevents the surface of the easy-icing part from icing, greatly reduces the heat exchange with the outside, and effectively prevents the icing phenomenon caused by heat absorption after rainwater is directly contacted with the tower body.

The invention relates to the technical field of asphalt mixtures, and discloses a discharge device for a road asphalt mixture. The discharge device comprises a storage tank, a bottom end portion, a discharge pipe, a driving motor, a rotating shaft, a cylinder, a switch-plate, a bracket plate. a support column, a base, a discharge hopper, an electric push rod, a push plate, an electric heating tube, a drive motor, a stirrer and a feed hopper, wherein the bottom end portion is located at the bottom of the storage tank, the middle position of the bottom of the bottom end portion is fixedly communiated with the top of the discharge pipe, and one side of the drive motor is fixedly connected to the upper side of the middle position of the right side of the discharge pipe. The discharge device achieves the purpose of rapidly discharging asphalt and avoiding a clogging phenomenon, and at the same time, controls the rate of discharging the asphalt by the speed of the rotation of the switch-plate, thereby improving the real-time manipulation of the asphalt discharge condition. And with the reverse taper of the bottom end portion, the asphalt can be concentrated at the top of the discharge pipe, thereby improving the discharge efficiency for the discharge pipe.

The invention relates to the technical field of asphalt processing, and discloses an asphalt stirring flue gas purification device. The asphalt stirring flue gas purification device comprises a bottomplate, the upper surface of the bottom plate is fixedly connected with a stirring tank, a left side wall of the stirring tank is fixedly connected with a stirring motor, an electric heating plate isfixedly connected between the inner left wall and the inner right wall of the stirring tank, the output end of the stirring motor is fixedly connected with a rotating shaft, and the outer surface of the rotating shaft is fixedly connected with a set of stirring shafts, the stirring shafts are evenly distributed on an outer surface of the rotating shaft, and the upper surface of the bottom plate isfixedly connected with an air pump. The asphalt stirring flue gas purification device solves the problem that the flue gas generated during an asphalt processing process has a great influence on theenvironment, and the flue gas is easily inhaled into the lungs by the operator, flue gas not only has bad smell, but also contains the polycyclic aromatic hydrocarbon carcinogens and some hydrocarbonparticles in the benzene series, and forms a threat to the environment and the physical and mental health of people.

The invention discloses a multifunctional ecological sightseeing culture device, which comprises a culture box body, wherein the culture box body is made of toughened glass; an air inlet device is arranged above the side of the culture box body; an air exhaust device is arranged on the side corresponding to the culture box body; and a bait box is mounted at the upper end of the culture box body. The multifunctional ecological sightseeing culture device is characterized in that both ends above the bait box are connected with a rotator on a sliding block through a thick rope; the sliding block is arranged on a cross rod; the rotator connected on the sliding block passes through the cross rod; a sliding rail is formed in the upper end surface of the cross rod; a through groove with the same length as the sliding rail is formed in the middle of the cross rod; the sliding block is connected with a telescopic device through a steel wire; the sliding block can freely slide on the sliding rail; and the air exhaust device can regularly pump air in the culture box body to accelerate the air circulation in the culture box body. The multifunctional culture device is simple to operate, energy-saving and environment-friendly, and integrates ventilation, oxygen exchange and automatic feeding.

The invention discloses an anti-clogging pulp dewatering device for production of volatile rust preventive paper, and relates to the technical field of production of rust preventive paper. The anti-clogging pulp dewatering device for the production of the volatile rust preventive paper comprises a water collecting bucket; a water outlet pipe is fixedly communicated with the bottom of the water collecting bucket; the surface of the water outlet pipe is fixedly connected with a seal valve; supporting legs, positioned around the water outlet pipe, are fixedly connected with the bottom of the water collecting bucket; the front of the water collecting bucket is hinged with a box door by means of a pin shaft; the bottom of the inner wall of the water collecting bucket is fixedly connected with afirst support frame. According to the anti-clogging pulp dewatering device for the production of the volatile rust preventive paper, a scraper blade has a cleaning effect on the inside of a water leakage sleeve; therefore, problems that at present, most of pulp dewatering devices use screens for dewatering, and part of the pulp are easy to adhere to the screens after entering the screens, so thatmesh holes of the screens are clogged, the water absorbed on the surface of the pulp cannot be normally discharged outside through the screens, and the quality of the pulp obtained after dewatering is lower can be effectively solved.

The invention discloses aquatic product screening equipment which structurally comprises a motor, a screening machine body, a bottom frame, an outer baffle and a cleaning device, the motor is located at the bottom of the left side of the screening machine body, and the cleaning device is arranged on the upper portion of the right side of the screening machine body. According to the equipment, live shrimps are cleaned before being screened, so that normal operation is prevented from being affected by sundries, and after cleaning, water is drained, and a water stop plate is opened, the live shrimps enter the screening roller from the sorting opening through the sliding plate, the live shrimp screening efficiency is improved, the roller operates to enable part of the live shrimps screened for the first time to fall out from the material receiving opening and the conveying belt to be collected, the baffles on the two sides of the conveying belt enable the live shrimps to be buffered, the damage rate of the live shrimps is reduced, pressing plates buffer extrusion on the live shrimps, and the survival rate of the shrimps is improved. The live shrimps are screened, transported and collected for multiple times, and the screening efficiency and the screening effect are improved.

The invention relates to the technical field of lithium batteries, and discloses a lithium battery sorting device and lithium battery production line. The lithium battery sorting device and lithium battery production line comprises a sorting box and second supporting legs, wherein a second sliding plate is fixedly arranged on the inner wall of the sorting box; a feed opening is arranged in the surface of the second sliding plate; first supporting legs are fixedly arranged at the four corners of the bottom of the sorting box; a motor is fixedly arranged on the surface of the sorting box; and the output end of the motor is fixedly connected to a transmission rod. According to the lithium battery sorting device and lithium battery production line, when batteries need to be sorted, the batteries are put from the second sliding plate, the motor is started to drive the transmission rod to rotate, a screening wheel is made to rotate, the No.5 batteries are screened out conveniently, the battery sorting quickness of the device is improved, the efficiency of manually screening the batteries is reduced, the efficiency of producing the batteries is improved to a great extent, and the normal production of the batteries is guaranteed.

The invention relates to the technical field of boilers and discloses an industrial boiler. The boiler comprises a boiler main body, wherein an exhaust pipe is connected to the top of the upper end ofthe outer wall of the boiler main body in a penetrating manner; a water feeding pipe is arranged at the upper part of the surface of one side of the outer wall of the boiler main body in a penetrating way; the upper part of the inner wall of the boiler main body is connected with a heated container, and the water feeding pipe is higher than the heated container at the same height; the lower partof the inner wall of the boiler main body is fixedly connected with a bearing supporting plate through a screw; the upper end of the bearing supporting plate and the lower part of the outer surface ofone side of the outer wall of the boiler main body are provided with supporting combustion devices for preventing materials from being accumulated and unfavorable for combustion; and the outer surface of the other side of the outer wall of the boiler main body is provided with a feeding device which forms an included angle of 60 degrees with the horizontal plane in a penetrating way. According tothe industrial boiler, the safety performance during feeding can be improved, the phenomenon of material accumulation is prevented, and the waste residue is conveniently cleaned and the cleaning efficiency of the waste residue is improved.

The invention discloses a self-deflection oil filtering device for oil-containing waste gas treatment. The invention belongs to the technical field of oily waste gas treatment. Densely distributed segmental oil filtering fiber rods can be arranged at the lower end of an oil filtering plate; the characteristic that the upper and lower parts have deflection distances is utilized; an oil absorption gap between the adjacent segmental oil filtering fiber rods is eliminated; the contact sufficiency is improved in a space range; therefore, the oil filtering effect and efficiency of the oil-containingwaste gas are improved; after the segmental oil filtering fiber rods adsorb, saturate and gain weight; a lower movable oil filtering fiber rod on the segmental oil filtering fiber rods forces a middle deflection transition rod to generate self-deflection action due to the reason that the weight is increased; a pre-embedded magnetic pressure liquid release ball is used for carrying out extrusion action based on the magnetic repulsion effect, so that an emulsifier for oil stains is released and is guided to the emulsification-promoting disintegration microsphere, and the permeation of the emulsifier and the emulsification of the oil stains are accelerated by utilizing the characteristic that the emulsification-promoting disintegration microsphere fiercely releases gas and vibrates when meeting water.

The invention relates to a breaking device, in particular to a tea staged breaking device. The tea staged breaking device comprises a valve and the like. A discharging hopper is connected to the lower portion of the right side of a processing box, a valve is arranged on the discharging hopper, and an inclined plate is arranged at the bottom in the processing box. A screened plate is connected to the lower middle portion of the processing box and arranged above the discharging hopper. A breaking device is arranged on the upper portion of the rear wall in the processing box. A feeding device is arranged on the top of the processing box. By the adoption of the tea staged breaking device, the good feeding airtightness of tea is achieved, the situation that the smell generated after the tea is broken diffuses in the air and makes surrounding people feel uncomfortable is prevented, the tea is broken finely, the breaking efficiency is high, the tea is prevented from remaining on the inclined plate and the screen plate, and the later processing effect of the broken tea is facilitated.

The invention relates to an anti-ice condensation cable which is suitable for frozen and rainy rough weather and an auxiliary facility which is matched with the anti-ice condensation cable and has an anti-ice condensation property. According to an anti-ice condensation field metal tower body, anti-condensation elements are arranged on the surface of a part with high ice condensation possibility on the tower body, and are arranged on the surfaces of a rod and a post which form the tower body in a buckled, sleeved, coated or adhered mode. By a method for arranging anti-condensation sleeves or the anti-condensation elements on the part with high ice condensation possibility on the tower body, ice condensation on the surface of the cable is effectively prevented, heat exchange between the cable and an external environment is greatly reduced, and the phenomenon of ice condensation caused by heat absorption due to direct contact between rainwater and the tower body is effectively prevented.

The invention discloses a domestic sewage treatment device, which comprises a barrel body. A water inlet pipe and a water outlet pipe are inserted into the bottom and top outer walls of the outer wallof one side of the barrel body correspondingly, a blow-off pipe is inserted into one side of the outer wall of the bottom of the barrel body, and inclined partition plates which are obliquely arranged are arranged on the inner walls of the two sides of the barrel body correspondingly, gaps are reserved between one sides of the two inclined partition plates and the inner wall of the barrel body, inclined net plates which are evenly distributed are arranged at the bottoms of the two inclined partition plates, and gaps are reserved between the bottoms of the inclined net plates, the tops of theinclined partition plates and the inner wall of the bottom of the barrel body. The inclined net plates are used for filtering sewage injected into the bottom of the barrel body, so that impurities inthe sewage are intercepted by the inclined net plates and slide to the bottom of the barrel body, and the inclined net plates and the inclined partition plates which are obliquely arranged enable theimpurities to slide to the blow-off pipe; activated carbon particles further filter the sewage filtered by the inclined net plates and a filter screen plate, and the filtered water is discharged through the water outlet pipe.

The invention discloses efficient food fermentation equipment. The efficient food fermentation equipment structurally comprises a bracket, a tank body, a top cover and a motor, wherein the bracket iswelded at the bottom of the tank body, the top cover is movably clamped with the top of the tank body, and the motor is mounted at the top of the top cover. When wort is added into a fermentation tank, part of malt in the wort is stuck on the inner wall of the tank body by a colloidal solution; a moving ring in the tank body rises along with the increase of the wort, a push block pushes the malt in the tank body upwards to fall to the bottom of the tank body, and the situation that part of malt in the wort is stuck to the inner wall of the tank body by the colloidal solution, so that the maltcontent at the bottom of the tank body is reduced, the alcoholic strength in the fermented wort is low, and beer production is affected is reduced. As the surface of the malt contains the colloidal solution, and the colloidal solution is viscous, part of the malt is accumulated on the surfaces of grooves, the gliding speed of the malt is reduced, the malt on the surfaces of the grooves is removedthrough hairbrushes at the bottom of a sliding block, the malt accumulated on the surfaces of the grooves is reduced, and the removed malt is accelerated to slide down along the grooves.

The invention provides a semi-dry desulfurization device. The semi-dry desulfurization device comprises a U-shaped desulfurization device shell; the U-shaped desulfurization device shell is sequentially provided with a paste semi-dry first-stage desulfurization section, a horizontal flue gas rectifying section, an adding second-stage desulfurization section, a Venturi acceleration section, a Venturi outlet section and a desulfurization bed third-stage desulfurization section in the flowing direction of flue gas; a flue gas inlet and a spraying device are arranged at the top of the paste semi-dry first-stage desulfurization section; the horizontal flue gas rectifying section is provided with a flue gas rectifying device; the adding second-stage desulfurization section is provided with an adding inlet; the Venturi outlet section is provided with a water spraying device; and the desulfurization bed third-stage desulfurization section is provided with a desulfurization flue gas outlet. Thesemi-dry desulfurization device is adopted for semi-dry desulfurization, an ion-type reaction environment, a high-alkali-to-sulfur-rate reaction environment and a high sliding speed are simultaneously achieved for mass transfer and heat transfer, control can be conducted separately according to the temperature of the flue gas at the inlet and the change of the sulfur capacity, the desulfurizationefficiency is improved, the consumption of a desulfurization agent is decreased, and long-term stable operation is achieved.