CN111921688A

CN111921688A - Energy-conserving milling machine for desulfurization of power plant with multistage screening mechanism

Info

Publication number: CN111921688A
Application number: CN202010778233.XA
Authority: CN
Inventors: 邵旦彪
Original assignee: Individual
Current assignee: Shaanxi Sanjiang Energy Gas Power Generation Co.,Ltd.
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2020-11-13
Anticipated expiration: 2040-08-05
Also published as: CN111921688B

Abstract

The invention discloses a flour mill with a multi-stage screening mechanism for energy-saving power plant desulfurization, and relates to the technical field of desulfurization flour mills; the problem that limestone is not crushed thoroughly is solved; specifically including the protective housing, protective housing top outer wall is provided with rotation motor, pay-off mouth and fixed shell respectively, and fixed shell top outer wall is provided with the feed inlet, and fixed shell inner wall is provided with four crocus cylinders respectively, and two crocus cylinders are a set of. According to the invention, by arranging the first material guide pipe and the second material guide pipe which are in conical structures, the limestone can be positioned at the top of the filter screen when coming out of the first material guide pipe and the second material guide pipe, so that most of the limestone slides downwards from the top of the filter screen, and the filtering effect of the filter screen is effectively improved; through setting up the branch material post of triangular prism type structure, can effectively avoid the lime stone to appear from the direct condition of rolling down of top outer wall of brush holder, improve the holistic filtration efficiency of filter screen.

Description

Energy-conserving milling machine for desulfurization of power plant with multistage screening mechanism

Technical Field

The invention relates to the technical field of desulfurization mills, in particular to an energy-saving power plant desulfurization mill with a multi-stage screening mechanism.

Background

Currently, desulfurization equipment is commonly used in the power industry. At present, the common desulfurization process is that limestone powder is added with water to prepare slurry which is used as an absorbent and pumped into an absorption tower to be fully contacted and mixed with flue gas, sulfur dioxide in the flue gas, calcium carbonate in the slurry and air blown from the lower part of the tower are subjected to oxidation reaction to generate calcium sulfate, and the calcium sulfate is crystallized to form dihydrate gypsum after reaching a certain saturation degree. The gypsum slurry discharged from the absorption tower is concentrated and dehydrated to make the water content less than 10%, then the gypsum slurry is conveyed to a gypsum storage bin by a conveyor to be stacked, the desulfurized flue gas is subjected to mist drop removal by a demister, and is heated by a heat exchanger to raise the temperature, and then the flue gas is discharged into the atmosphere by a chimney. Because the absorbent slurry in the absorption tower is contacted with the flue gas through the repeated circulation of the circulating pump, the utilization rate of the absorbent is very high, the calcium-sulfur ratio is low, and the desulfurization efficiency can be higher than 95%. Traditional limestone pulverizer consumes energy great, and the energy waste is serious, and the structure is complicated moreover, can not carry out hierarchical screening to the lime stone after smashing.

Through the retrieval, chinese patent application number is CN 204034829U's patent, discloses a meticulous desulfurization milling machine, including base, fine powder motor cabinet, fine grinding barrel holder, workbin, upper bracket board, corase grind motor and corase grind roller support, fixed mounting has fine grinding barrel holder on the base, install fine grinding barrel shaft on the fine grinding barrel holder, but above-mentioned technical scheme is owing to not set up corresponding multistage screening mechanism, consequently still exists and can't carry out hierarchical screening to the lime stone after smashing, leads to the not thorough problem of lime stone crushing.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a flour mill with a multi-stage screening mechanism for desulfurization of an energy-saving power plant.

In order to achieve the purpose, the invention adopts the following technical scheme:

a flour mill with a multi-stage screening mechanism for desulfurization of a power plant comprises a protective shell, wherein a rotary motor, a feeding port and a fixed shell are respectively arranged on the outer wall of the top of the protective shell, a feeding port is formed in the outer wall of the top of the fixed shell, four milling rollers are respectively arranged on the inner wall of the fixed shell, two milling rollers are taken as a group, a feeding plate is arranged on the outer wall of the bottom of the fixed shell, a thirty-degree inclination angle is formed between the feeding plate and the horizontal plane, an output shaft of the rotary motor is rotatably connected with a rotating shaft through a coupler, the outer wall of the bottom of the rotating shaft is rotatably connected onto the outer wall of the bottom of the protective shell through a rotary bearing, a first screening mechanism and a second screening mechanism are respectively fixed on the outer wall of the rotating shaft through rotary bearings, a first material guide pipe is arranged on the outer wall of the top of, the second passage is connected to the outer wall of the top of the second screening mechanism in a penetrating mode, the outer wall of the bottom of the second screening mechanism is provided with a storage barrel, the outer wall of the bottom of the storage barrel is provided with a discharge port, and the first screening mechanism and the second screening mechanism are consistent in composition structure.

Preferably: the first screening mechanism and the second screening mechanism comprise two filter screens, eight brush handles, eight brush hairs, two material pushing platforms, two material pushing blocks and two feeding grooves, the filter screens are fixed on the outer wall of the rotating shaft through bearings, four brush handles are respectively arranged on the outer wall of the rotating shaft, four brush hairs are respectively arranged on the outer walls of the bottoms of the four brush handles, the outer wall of one side of each material pushing platform is arranged on the outer wall of the corresponding filter screen, the feeding grooves are arranged on the outer wall of the top of each material pushing platform, the material pushing blocks are arranged on the outer wall of one of the four brush handles, each filter screen is in a conical structure, the brush handles are arranged parallel to the surface of the corresponding filter screen, the material pushing platforms are parallel to the horizontal plane, the material pushing blocks are arranged parallel to the surface of the material pushing platforms, the material pushing platforms, the filtering holes of the filtering net in the first screening mechanism are larger than the filtering holes of the filtering net in the second screening mechanism.

Further: first screening mechanism and second screening mechanism outer wall are opened respectively and are had two rectangles to lead to the groove, the logical inslot wall of rectangle is provided with fixed frame, fixed frame both sides inner wall is opened respectively has two spouts, two spout inner wall sliding connection have the slider, slider one side outer wall is provided with ejector pin and spring respectively, fixed frame one side outer wall is provided with L type backup pad, L type backup pad one side outer wall is provided with control button, spring one side outer wall sets up on one side outer wall of L type backup pad, the logical groove of rectangle is opened to chute feeder one side outer wall, rectangle leads to inslot wall and is provided with electric conveyor, electric conveyor bottom outer wall is provided with electric putter and the control unit respectively, electric putter's output shaft outer wall is provided with L type baffle, the slider is the trapezium structure, control unit and electric putter and.

Further preferred is: the protective housing top outer wall is provided with four bracing pieces respectively, and four bracing piece outer walls are provided with two respectively and place the board, and two are placed board top outer walls and are provided with first collection box and second collection box respectively, and first collection box and second collection box are located the one end of two electric conveyor belt respectively.

As a preferable aspect of the present invention: first screening mechanism and second screening mechanism outer wall are provided with two solid fixed rings respectively, and solid fixed ring one side outer wall sets up on one side inner wall of protective housing.

Further preferred as the invention: the first material guide pipe and the second material guide pipe are of conical structures, the first material guide pipe and the second material guide pipe are arranged on the outer wall of the rotating shaft through bearings, and the first material guide pipe and the second material guide pipe are located on the same axis as the first screening mechanism and the second screening mechanism.

As a still further scheme of the invention: the outer wall of the top of the brush handle is provided with a material distributing column which is in a triangular prism structure.

On the basis of the scheme: the outer wall of the rotating shaft is provided with more than three material beating rods respectively, and the material beating rods are distributed on the positions, located on the rotating shaft, of the material storage barrel, the first material guide pipes and the second material guide pipes.

On the basis of the foregoing scheme, it is preferable that: the outer wall of the bottom of the storage bucket forms a twenty-degree inclination angle with the horizontal plane.

The invention has the beneficial effects that:

1. through setting up the filter screen of conical structure, brush holder and brush hair, when the lime stone that is processed by the crocus cylinder is sent into filter screen top outer wall through first passage, not can be through self gravity lapse by the complete limestone of smashing, the lime stone that accords with the size can get into second screening mechanism through the filtration pore of filter screen and continue to sieve, the pivot drives brush holder and brush hair this moment and rotates, the brush hair can brush the downthehole accumulational lime stone of filtration, avoid the filter screen to block the influence screening effect.

2. Through setting up the ejector pad, push away material platform and chute feeder, the lime stone that rolls off on the filter screen can be piled up and push away the material platform, the material platform that pushes away who uses the same filtration material to make with the filter screen can continue to filter the lime stone, improve the holistic filter effect of screening mechanism, the ejector pad can follow the brush handle and do circular motion at material platform top outer wall simultaneously, the ejector pad can promote the lime stone on pushing away the material platform when removing and move together, when help material platform that pushes away carries out filterable, also can be not conform to the lime stone propulsion chute feeder of big or small standard, thereby the lime stone is retrieved by the staff outside the eduction gear through the chute feeder and is accomplished the screening work to the lime stone to the efficient.

3. Through setting up the spring, the slider, the ejector pin, control button, electric putter and L type baffle, L type baffle passes through electric putter's fixed fender and avoids the lime stone powder of milling machine device inside to scatter out at the opening part of chute feeder, when pushing away the material piece and removing the position of slider, the slider receives the extrusion and takes place the displacement and promote ejector pin extrusion control button, receive extruded control button to send electric signal control electric putter to electric putter and promote L type baffle downwards, thereby open the opening of chute feeder and let the material piece push away outside the lime stone discharging device, when pushing away the material piece and removing the slider, the slider receives the effect recovery normal position of spring, control button control electric putter resets this moment, let the opening of chute feeder reclose, avoid the opening of chute feeder to open the condition that leads to the abundant excessive of lime stone powder to appear always.

4. By arranging the first material guide pipe and the second material guide pipe which are in conical structures, the limestone can be positioned at the top of the filter screen when coming out of the first material guide pipe and the second material guide pipe, so that most of the limestone slides downwards from the top of the filter screen, and the filtering effect of the filter screen is effectively improved; through setting up the branch material post of triangular prism type structure, can effectively avoid the lime stone to appear from the condition that the top outer wall of brush holder directly rolled down, improve the holistic filtration efficiency of filter screen.

5. Through setting up the knockout pin, when the milling machine carries out the during operation, the pivot drives the knockout pin of outer wall and rotates, stirs the inside lime stone of storage vat, first passage and second passage, avoids the lime stone to take place the normal operating that the phenomenon influences equipment that blocks, has just realized preventing through a rotation motor that the lime stone from blockking and helping the filter screen to carry out filterable function simultaneously, has effectively practiced thrift the power consumption of equipment.

Drawings

FIG. 1 is a schematic structural diagram of a main view of a pulverizer with a multi-stage screening mechanism for desulfurization in an energy-saving power plant according to the present invention;

FIG. 2 is a schematic structural diagram of a pulverizing device of a pulverizer for desulfurization in an energy-saving power plant, which is provided with a multi-stage screening mechanism, according to the present invention;

FIG. 3 is a schematic structural diagram of a sieving mechanism of a pulverizer for desulfurization in an energy-saving power plant, which is provided with a multi-stage sieving mechanism according to the present invention;

FIG. 4 is a schematic structural diagram of a material pushing platform of the energy-saving flour mill for power plant desulfurization provided by the invention, and the material pushing platform is provided with a multi-stage screening mechanism;

FIG. 5 is a schematic structural diagram of a fixing frame of a flour mill for desulfurization in an energy-saving power plant, which is provided with a multi-stage screening mechanism and provided by the invention;

FIG. 6 is a schematic structural view of an L-shaped baffle of a pulverizer for desulfurization in an energy-saving power plant with a multi-stage screening mechanism according to the present invention;

FIG. 7 is a schematic cross-sectional view of a second material guiding pipe and a material storage barrel of the energy-saving pulverizer for power plant desulfurization provided with a multi-stage screening mechanism;

FIG. 8 is a schematic cross-sectional view of a first material guiding pipe of a pulverizer for desulfurization in an energy-saving power plant with a multi-stage screening mechanism according to the present invention;

fig. 9 is a schematic circuit flow diagram of a pulverizer for desulfurization in an energy-saving power plant with a multi-stage screening mechanism according to the present invention.

In the figure: 1 protective housing, 2 discharge gates, 3 support rods, 4 placing plates, 5 first recovery boxes, 6 second recovery boxes, 7 feed inlets, 8 fixed shells, 9 feed ports, 10 rotating motors, 11 first guide pipes, 12 fixed rings, 13 first screening mechanisms, 14 second guide pipes, 15 second screening mechanisms, 16 storage tanks, 17 rotating shafts, 18 grinding rollers, 19 feed plates, 20 material dividing columns, 21 bristles, 22 brush handles, 23 filter screens, 24 feed tanks, 25L-shaped baffles, 26 sliders, 27 material pushing platforms, 28 material pushing blocks, 29 fixed frames, 30 springs, 31L-shaped support plates, 32 control buttons, 33 ejector rods, 34 electric push rods, 35 electric conveying belts, 36 material pushing rods and 37 control units.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by one of ordinary skill in the art as a matter of context.

A flour mill with a multi-stage screening mechanism for desulfurization of an energy-saving power plant is disclosed, as shown in figures 1 and 2, the flour mill comprises a protective shell 1, the outer wall of the top of the protective shell 1 is respectively provided with a rotating motor 10, a feeding port 9 and a fixed shell 8, the outer wall of the top of the fixed shell 8 is provided with a feeding port 7, the inner wall of the fixed shell 8 is respectively provided with four milling rollers 18, two milling rollers 18 are in a group, the outer wall of the bottom of the fixed shell 8 is provided with a feeding plate 19, the feeding plate 19 and the horizontal plane form a thirty-degree inclination angle, an output shaft of the rotating motor 10 is rotatably connected with a rotating shaft 17 through a coupler, the outer wall of the bottom of the rotating shaft 17 is rotatably connected onto the outer wall of the bottom of the protective shell 1 through a rotating bearing, the outer wall of the rotating shaft 17 is respectively fixed with a first, first passage 11 runs through first screening mechanism 13 top outer wall, and first screening mechanism 13 bottom outer wall is provided with second passage 14, and second passage 14 through connection is on the top outer wall of second screening mechanism 15, and second screening mechanism 15 bottom outer wall is provided with storage vat 16, and storage vat 16 bottom outer wall is provided with discharge gate 2, and first screening mechanism 13 is unanimous with second screening mechanism 15 component structure.

In order to effectively screen the crushed limestone; as shown in fig. 1, 3 and 4, the first screening mechanism 13 and the second screening mechanism 15 include two filter screens 23, eight brush holders 22, eight bristles 21, two pushing platforms 27, two pushing blocks 28 and two feeding slots 24, the filter screens 23 are fixed on the outer wall of the rotating shaft 17 through bearings, the four brush holders 22 are respectively arranged on the outer wall of the rotating shaft 17, the four bristles 21 are respectively arranged on the outer walls of the bottoms of the four brush holders 22, the outer wall of one side of the pushing platform 27 is arranged on the outer wall of the filter screens 23, the feeding slot 24 is arranged on the outer wall of the top of the pushing platform 27, the pushing blocks 28 are arranged on the outer wall of one of the four brush holders 22, the filter screens 23 are in a conical structure, the brush holders 22 are arranged parallel to the surface of the filter screens 23, the pushing platforms 27 are parallel to the horizontal plane, the pushing blocks 28 are arranged parallel to the surface of the pushing platforms 27, the material pushing platform 27 is made of the same filtering material as the filtering net 23, the bristles 21 are made of pig bristles, and the filtering holes of the filtering net 23 in the first screening mechanism 13 are larger than the filtering holes of the filtering net 23 in the second screening mechanism 15; through the arrangement of the filter screen 23, the brush holder 22 and the brush 21 which are in the conical structure, when limestone processed by the grinding roller 18 is sent to the outer wall of the top of the filter screen 23 through the first material guide pipe 11, the limestone which is not completely ground can slide downwards through self gravity, the limestone which meets the size can enter the second screening mechanism 15 through the filter holes of the filter screen 23 to be screened continuously, at the moment, the rotating shaft 17 drives the brush holder 22 and the brush 21 to rotate, the brush 21 can brush off the limestone accumulated in the filter holes, and the filter screen 23 is prevented from being blocked to influence the screening effect; through the arrangement of the material pushing block 28, the material pushing platform 27 and the feeding groove 24, limestone rolling down from the filter screen 23 can be stacked on the material pushing platform 27, the material pushing platform 27 made of the same filtering material as the filter screen 23 can continue to filter the limestone, the integral filtering effect of the screening mechanism is improved, meanwhile, the material pushing block 28 can follow the brush holder 22 to do circular motion on the outer wall of the top of the material pushing platform 27, the material pushing block 28 can push the limestone on the material pushing platform 27 to move together when moving, and when the material pushing platform 27 is assisted to filter, the limestone which does not meet the size standard can be pushed into the feeding groove 24, and then the limestone is discharged out of the device through the feeding groove 24 and is recycled by workers, so that the limestone screening work can be completed quickly and efficiently.

In order to avoid that the crushed limestone powder overflows from the feeding groove 24 in a large amount to influence the surrounding working environment; as shown in fig. 4, 5, 6 and 7, the outer walls of the first screening mechanism 13 and the second screening mechanism 15 are respectively provided with two rectangular through grooves, the inner wall of each rectangular through groove is provided with a fixing frame 29, the inner walls of two sides of the fixing frame 29 are respectively provided with two sliding grooves, the inner walls of the two sliding grooves are slidably connected with a sliding block 26, the outer wall of one side of the sliding block 26 is respectively provided with a top rod 33 and a spring 30, the outer wall of one side of the fixing frame 29 is provided with an L-shaped supporting plate 31, the outer wall of one side of the L-shaped supporting plate 31 is provided with a control button 32, the outer wall of one side of the spring 30 is arranged on the outer wall of one side of the L-shaped supporting plate 31, the outer wall of one side of the feeding groove 24 is provided with a rectangular through groove, the inner wall of each rectangular through, the control unit 37 is electrically connected with the electric push rod 34 and the control button 32; by arranging the spring 30, the sliding block 26, the ejector rod 33, the control button 32, the electric push rod 34 and the L-shaped baffle plate 25, the L-shaped baffle plate 25 is blocked at the opening of the feed chute 24 through the fixing of the electric push rod 34 to prevent limestone powder in the pulverizer device from scattering, when the pushing block 28 moves to the position of the sliding block 26, the sliding block 26 is extruded to displace, so that the ejector rod 33 is pushed to extrude the control button 32, the extruded control button 32 sends an electric signal to the electric push rod 34 to control the electric push rod 34 to push the L-shaped baffle plate 25 downwards, so that the opening of the feed chute 24 is opened to enable the pushing block 28 to push the limestone discharge device, when the pushing block 28 moves out of the sliding block 26, the sliding block 26 is restored to the original position under the action of the spring 30, at the moment, the control button 32 controls the electric push rod 34 to reset, and the.

In order to facilitate the staff to pour the screened limestone into the pulverizer again for pulverization; as shown in fig. 1, four support rods 3 are respectively arranged on the outer wall of the top of the protective shell 1, two placing plates 4 are respectively arranged on the outer walls of the four support rods 3, a first recovery box 5 and a second recovery box 6 are respectively arranged on the outer walls of the tops of the two placing plates 4, and the first recovery box 5 and the second recovery box 6 are respectively located at one end of two electric conveyor belts 35; through setting up first collection box 5 and second collection box 6, let the limestone that first screening mechanism 13 and second screening mechanism 15 screened out be sent into first collection box 5 and second collection box 6 through electric conveyor belt 35 respectively, the staff can pour the inside limestone of first collection box 5 and second collection box 6 back into feed inlet 7 again and carry out the crocus once more after first collection box 5 and second collection box 6 fill, effectively improve the utilization ratio of limestone.

In order to improve the stability of the first screening mechanism 13 and the second screening mechanism 15; as shown in fig. 1, the outer walls of the first screening mechanism 13 and the second screening mechanism 15 are respectively provided with two fixing rings 12, and the outer wall of one side of each fixing ring 12 is arranged on the inner wall of one side of the protective shell 1; through setting up solid fixed ring 12 at first screening mechanism 13 and second screening mechanism 15 outer wall, can improve the stability of first screening mechanism 13 and second screening mechanism 15 at the during operation that sieves, avoid first screening mechanism 13 and second screening mechanism 15 to produce too big the condition of rocking and leading to the internal plant impaired to appear when equipment carries out the during operation, improved the security of equipment operation.

In order to allow the limestone discharged from the first and

second guide pipes

11 and 14 to be gathered on the top of the filter screen 23; as shown in fig. 1 and 3, the first material guiding pipe 11 and the second material guiding pipe 14 are in a conical structure, the first material guiding pipe 11 and the second material guiding pipe 14 are disposed on the outer wall of the rotating shaft 17 through a bearing, and the first material guiding pipe 11 and the second material guiding pipe 14, the first screening mechanism 13 and the second screening mechanism 15 are located on the same axis; through setting up the first baffle pipe 11 and the second baffle pipe 14 of conical structure, can let limestone all be located the top of filter screen 23 when coming out from first baffle pipe 11 and second baffle pipe 14 to let most limestone all be from the downward landing in top of filter screen 23, effectively improved the filtering effect of filter screen 23.

To avoid the situation where the limestone rolls directly off the top outer wall of the brush handle 22; as shown in fig. 3, a material distributing column 20 is arranged on the outer wall of the top of the brush handle 22, and the material distributing column 20 is in a triangular prism structure; through the material distributing column 20 with the triangular prism structure, the situation that limestone directly rolls down from the outer wall of the top of the brush handle 22 can be effectively avoided, and the overall filtering efficiency of the filter screen 23 is improved.

To prevent the limestone from being blocked while passing through the first and

second guide tubes

11 and 14; as shown in fig. 7, the outer wall of the rotating shaft 17 is provided with more than three material stirring rods 36, and the material stirring rods 36 are distributed at the positions of the material storage barrel 16, the first material guiding pipe 11 and the second material guiding pipe 14 on the rotating shaft; through setting up the material beating rod 36, when the milling machine worked, pivot 17 drove the material beating rod 36 of outer wall and rotates, stirs the inside lime stone of storage vat 16, first passage 11 and second passage 14, avoids the lime stone to take place the normal operating that the phenomenon influences equipment that blocks, has just realized preventing that the lime stone from blockking and helping filter screen 23 to carry out filterable function through a rotation motor 10 simultaneously, has effectively practiced thrift the power consumption of equipment.

To avoid the occurrence of a phenomenon of piling and caking due to the limestone powder not being discharged completely from the interior of the storage silo 16; as shown in fig. 1, the outer wall of the bottom of the storage bin 16 forms an inclination angle of twenty degrees with the horizontal plane; through setting up the 16 bottom outer walls of storage vat of slope, can let the inside limestone flour of storage vat 16 pass through discharge opening 2 fast outside by discharging device, avoided the limestone flour can not thoroughly follow the inside discharge of storage vat 16 and lead to appearing piling up the phenomenon of caking.

In the embodiment, when the limestone pulverizer is used, a worker puts limestone to be pulverized into the feed inlet 7, the pulverizing roller 18 pulverizes the limestone, the pulverized limestone enters the first guide pipe 11 through the feed inlet 9, and then enters the second screening mechanism 15 through the second guide pipe 14 after being screened by the first screening mechanism 13, the limestone powder after being screened in multiple stages enters the storage barrel 16, the processed limestone powder is discharged from the discharge port 2 and collected by the worker, when the limestone processed by the pulverizing roller 18 is sent to the outer wall of the top of the filter screen 23 through the first guide pipe 11, the limestone which is not completely pulverized slides downwards through self gravity, the limestone with a size is sent to the second screening mechanism 15 through the filter holes of the filter screen 23 to be continuously screened, at this time, the rotating shaft 17 drives the brush holder 22 and the brush bristles 21 to rotate, the brush hairs 21 can brush off the limestone accumulated in the filter holes, the filter screen 23 is prevented from being blocked to influence the screening effect, the limestone rolling down from the filter screen 23 can be accumulated on the material pushing platform 27, the material pushing platform 27 made of the same filtering material as the filter screen 23 can continue to filter the limestone, meanwhile, the material pushing block 28 can move circularly on the outer wall of the top of the material pushing platform 27 along with the brush handle 22, the material pushing block 28 can push the limestone on the material pushing platform 27 to move together when moving, the limestone which does not accord with the size standard can be pushed into the material feeding groove 24 while the material pushing platform 27 is assisted to filter, then the limestone is recycled by workers outside the discharge device through the material feeding groove 24, the L-shaped baffle 25 is blocked at the opening of the material feeding groove 24 through the fixing of the electric push rod 34 to prevent the limestone powder in the grinding device from scattering, when the material pushing block 28 moves to the position of the sliding block 26, the sliding block 26 is extruded to displace, the ejector rod 33 is pushed to extrude the control button 32, the extruded control button 32 sends an electric signal to the electric push rod 34 to control the electric push rod 34 to push the L-shaped baffle 25 downwards, so that the opening of the feeding groove 24 is opened to allow the limestone blocks pushed by the material pushing block 28 to be discharged out of the device, when the material pushing block 28 moves out of the sliding block 26, the sliding block 26 is restored under the action of the spring 30, at the moment, the control button 32 controls the electric push rod 34 to be restored to allow the opening of the feeding groove 24 to be closed again, the screened limestone is respectively fed into the first recovery box 5 and the second recovery box 6 through the electric conveyor belt 35, after the first recovery box 5 and the second recovery box 6 are filled up, the limestone in the first recovery box 5 and the second recovery box 6 can be poured into the feed inlet 7 again for grinding, when the pulverizer works, the rotating shaft 17 drives the material beating rod 36 on the outer wall to rotate, limestone inside the storage barrel 16, the first material guide pipe 11 and the second material guide pipe 14 is stirred, and the limestone is prevented from being blocked to influence the normal operation of the pulverizer.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present invention, and the technical solutions and the inventive concepts of the present invention are equivalent to or changed within the technical scope of the present invention.

Claims

1. The utility model provides an energy-conserving power plant's milling machine for desulfurization with multistage screening mechanism, including protective housing (1), a serial communication port, protective housing (1) top outer wall is provided with rotation motor (10), pay-off mouth (9) and fixed shell (8) respectively, fixed shell (8) top outer wall is provided with feed inlet (7), fixed shell (8) inner wall is provided with four crocus cylinders (18) respectively, crocus cylinder (18) two are a set of, fixed shell (8) bottom outer wall is provided with feed table (19), feed table (19) and level are thirty degrees inclination, the output shaft of rotation motor (10) rotates through the shaft coupling and is connected with pivot (17), pivot (17) bottom outer wall rotates through rolling bearing and connects in the bottom outer wall of protective housing (1), pivot (17) outer wall is fixed with first screening mechanism (13) and second screening mechanism (15) through rolling bearing respectively, first screening mechanism (13) top outer wall is provided with first passage (11), first passage (11) run through first screening mechanism (13) top outer wall, first screening mechanism (13) bottom outer wall is provided with second passage (14), second passage (14) through connection is on the top outer wall of second screening mechanism (15), second screening mechanism (15) bottom outer wall is provided with storage vat (16), storage vat (16) bottom outer wall is provided with discharge gate (2), first screening mechanism (13) and second screening mechanism (15) constitute the structure unanimously.

2. The pulverizer with the multi-stage screening mechanism for desulfurization in power plant according to claim 1, wherein the first screening mechanism (13) and the second screening mechanism (15) comprise two filtering nets (23), eight brush handles (22), eight bristles (21), two pushing platforms (27), two pushing blocks (28) and two feeding chutes (24), the filtering nets (23) are fixed on the outer wall of the rotating shaft (17) through bearings, the four brush handles (22) are respectively arranged on the outer wall of the rotating shaft (17), the four bristles (21) are respectively arranged on the outer walls of the bottoms of the four brush handles (22), the outer wall of one side of the pushing platform (27) is arranged on the outer wall of the filtering nets (23), the feeding chutes (24) are arranged on the outer wall of the top of the pushing platform (27), the pushing blocks (28) are arranged on the outer wall of one of the four brush handles (22), the filter screen (23) is in a conical structure, the brush handle (22) is arranged in parallel with the surface of the filter screen (23), the material pushing platform (27) is parallel to the horizontal plane, the material pushing block (28) is arranged in parallel with the surface of the material pushing platform (27), the material pushing platform (27) is made of the same filtering material as the filter screen (23), the bristles (21) are made of pig bristles, and the filtering holes of the filter screen (23) inside the first screening mechanism (13) are larger than the filtering holes of the filter screen (23) of the second screening mechanism (15).

3. The pulverizer with the multi-stage sieving mechanism for desulfurization in power plant according to claim 2, wherein the outer walls of the first sieving mechanism (13) and the second sieving mechanism (15) are respectively provided with two rectangular through grooves, the inner wall of the rectangular through groove is provided with a fixed frame (29), the inner walls of both sides of the fixed frame (29) are respectively provided with two sliding grooves, the inner walls of the two sliding grooves are slidably connected with a sliding block (26), the outer wall of one side of the sliding block (26) is respectively provided with a top rod (33) and a spring (30), the outer wall of one side of the fixed frame (29) is provided with an L-shaped support plate (31), the outer wall of one side of the L-shaped support plate (31) is provided with a control button (32), the outer wall of one side of the spring (30) is arranged on the outer wall of one side of the L-shaped support plate (31), the outer wall of the bottom of the electric conveyor belt (35) is provided with an electric push rod (34) and a control unit (37) respectively, the outer wall of an output shaft of the electric push rod (34) is provided with an L-shaped baffle (25), the sliding block (26) is of a trapezoidal structure, and the control unit (37) is electrically connected with the electric push rod (34) and the control button (32).

4. The energy-saving mill for desulfurization in power plant with multi-stage screening mechanism according to claim 3, wherein the outer wall of the top of the protective shell (1) is provided with four support rods (3), the outer wall of the four support rods (3) is provided with two placing plates (4), the outer wall of the top of the two placing plates (4) is provided with a first recycling box (5) and a second recycling box (6), and the first recycling box (5) and the second recycling box (6) are respectively located at one end of two electric conveyor belts (35).

5. The energy-saving mill for desulfurization in power plants with the multi-stage screening mechanism according to claim 4, wherein the outer walls of the first screening mechanism (13) and the second screening mechanism (15) are respectively provided with two fixing rings (12), and the outer wall on one side of the fixing ring (12) is arranged on the inner wall on one side of the protective shell (1).

6. The pulverizer with the multi-stage screening mechanism for desulfurization in power plant of claim 5, wherein the first material guiding pipe (11) and the second material guiding pipe (14) are conical, the first material guiding pipe (11) and the second material guiding pipe (14) are disposed on the outer wall of the rotating shaft (17) through bearings, and the first material guiding pipe (11) and the second material guiding pipe (14) are located on the same axis as the first screening mechanism (13) and the second screening mechanism (15).

7. The energy-saving mill for desulfurization in power plants with the multi-stage screening mechanism as claimed in claim 6, wherein the outer wall of the top of the brush handle (22) is provided with the material-distributing column (20), and the material-distributing column (20) is in a triangular prism structure.

8. The pulverizer with the multi-stage screening mechanism for desulfurization in power plants according to claim 7, wherein the outer wall of the rotating shaft (17) is provided with more than three material stirring rods (36), and the material stirring rods (36) are distributed at the positions of the rotating shaft, where the material storage barrel (16), the first material guiding pipe (11) and the second material guiding pipe (14) are located.

9. The energy-saving mill for desulfurization in power plants with the multi-stage screening mechanism according to claim 8, wherein the outer wall of the bottom of the storage barrel (16) forms an inclination angle of twenty degrees with the horizontal plane.