Power plant desulfurization gypsum recovery system

Abstract

The invention belongs to the technical field of desulfurization gypsum recovery, and particularly relates to a power plant desulfurization gypsum recovery system which comprises a machine frame, a conveying roller set, a stirring machine, drying equipment, a smashing machine and collecting equipment, and the conveying roller set, the stirring machine, the drying equipment, the smashing machine and the collecting equipment are sequentially arranged on the machine frame in the conveying direction of desulfurization gypsum. A first roller and a second roller are arranged above the discharging end of the conveying roller set, the horizontal projection of the axis of the first roller is parallel to the conveying direction of the conveying roller set, the front end of the first roller warps upwards and faces the feeding end of the conveying roller set, the first roller is parallel to the second roller, and the second roller is parallel to the feeding end of the conveying roller set. A gap between the first roller and the second roller forms an extrusion channel of a bag body, a guiding-out assembly used for guiding out the bag body is arranged above the extrusion channel, the system can achieve recycling of desulfurized gypsum in an automatic mode, secondary pollution is reduced, and the dual benefits of environmental protection and resource recovery are achieved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of desulfurization gypsum recycling, and particularly relates to a power plant desulfurization gypsum recycling system. BACKGROUND

[0002] A large amount of SO2 is contained in flue gas generated in the process of burning coal or oil in a power plant, and such gas is one of the main culprits of acid rain and atmospheric pollution, which not only causes serious damage to the ecological environment, but also harms human health. In order to meet the emission standard, limestone is usually used as a desulfurizer to desulfurize SO2 in the flue gas. The limestone reacts with the flue gas to generate calcium sulfite, which is finally formed into desulfurization gypsum after oxidation. In order to ensure the desulfurization effect, new desulfurizers need to be replaced in time. When the desulfurizers are replaced, the replacement environment usually needs to be sprayed to prevent the flue gas or dust from having adverse effects on the operators, and the desulfurizers also absorb the sprayed water during the working process. Therefore, the replaced desulfurization gypsum is in a paste-like state with a large amount of water. The large amount of replaced desulfurization gypsum is bagged and stacked, which not only occupies a large amount of land resources, but also causes secondary environmental pollution. Therefore, it is a problem to be solved by those skilled in the art to realize the recycling of desulfurization gypsum. SUMMARY

[0003] In order to solve the problems existing in the prior art, the present application provides a power plant desulfurization gypsum recycling system, which can realize the recycling of desulfurization gypsum in an automatic manner, reduce secondary pollution, and realize the dual benefits of environmental protection and resource recycling.

[0004] The specific technical scheme adopted by the present application is as follows:

[0005] A power plant desulfurization gypsum recycling system, comprising a rack, a conveying roller group, a mixer, a drying device, a pulverizer and a collecting device which are sequentially arranged on the rack in the conveying direction of the desulfurization gypsum, wherein the feeding port of the mixer is located below the discharging end of the conveying roller group, a first roller and a second roller are arranged above the discharging end of the conveying roller group, the horizontal projection of the axis of the first roller is arranged in parallel with the conveying direction of the conveying roller group, the front end of the first roller is upwardly curved and arranged towards the feeding end of the conveying roller group, the first roller and the second roller are arranged in parallel, and the gap between the first roller and the second roller forms an extrusion channel of a bag body, and a guide-out assembly for guiding the bag body out of the conveying roller group is further arranged above the extrusion channel.

[0006] The guide-out assembly comprises a cover plate, a first rotating shaft and a conveying belt which are arranged on the rack, respectively, the feeding end of the conveying belt and the first rotating shaft are located below the cover plate, respectively, a gap is formed between the first rotating shaft and the conveying belt, and the gap forms an input end of the guide-out assembly, and the input end is located above the extrusion channel.

[0007] The first rotating shaft is provided with a group of rubber wheels, the cover plate is overlapped on the rubber wheels, and the rubber wheels are arranged in gaps with the conveying belt.

[0008] The conveying belt is divided into two sections along the conveying direction, including an input section and an output section, the input section and the output section are connected through a transfer roller, the input end of the input section and the output end of the output section are respectively supported by a second rotating shaft.

[0009] The first roller and the second roller are drivingly connected through a transmission assembly, the transmission assembly comprises a driving wheel and a driven wheel, the driving wheel is drivingly connected with the driven wheel through a pair of intermediate transmission wheels, the driving wheel is fixedly connected with the first roller, the driven wheel is fixedly connected with the second roller, the rack is further provided with a separation driving assembly of the first roller and the second roller, the separation driving assembly comprises an extension rod, a first connecting rod, a second connecting rod and a third connecting rod, the intermediate transmission wheels are respectively installed at two ends of the second connecting rod, the driving wheel is installed on the first connecting rod, the driven wheel is installed on the third connecting rod, the first connecting rod and the third connecting rod are respectively hinged with the adjacent intermediate transmission wheels, the fixed end of the extension rod is connected with the rack, and the driven wheel has the freedom of translation on the rack through the driving of the extension end of the extension rod.

[0010] The extension end of the extension rod is connected with the mounting plate of the second roller, the second roller has the freedom of rotation on the mounting plate, and the rack is provided with a guide sliding groove matched with the mounting plate.

[0011] The extension end of the extension rod is fixedly connected with the mounting plate, the other end of the extension rod is a threaded rod, the rack is provided with a rotating gear, the rotating gear has the freedom of rotation around its own axis on the rack through the driving of the driving handle, an internal thread sleeve is coaxially arranged on the rotating gear, the threaded rod is screw-coupled with the internal thread sleeve, and the axial direction of the extension rod is perpendicular to the second roller.

[0012] The lower end of the mixer is arranged in a pit, the mixer is connected with the drying equipment through a first elevator, the drying equipment is connected with the pulverizer through a second elevator, and the pulverizer is connected with the collecting equipment through a third elevator.

[0013] The air outlet of the drying equipment is connected with an air purification equipment through an air pipe, and the air purification equipment comprises a dust remover and a spray tower arranged in sequence along the air flow direction.

[0014] The mixer is arranged in the pit, the drying equipment is connected with the pulverizer through the second elevator, and the pulverizer is connected with the collecting equipment through the third elevator.

[0015] The application adopts the setting of the conveying roller group to convey the bag body provided with the desulfurization gypsum, and the first roller and the second roller are used to extrude the desulfurization gypsum from the bag body, so that the position of manual operation is far away from the feeding port of the mixer, the risk of the operator falling into the mixer by accident is effectively avoided, the safety of the desulfurization gypsum recovery operation is greatly improved, and the manual lifting of the bag body is not needed for the pouring of the desulfurization gypsum in the bag body, so that the labor cost is effectively saved.

[0016] The gypsum is treated by means of the mixer, the drying equipment and the pulverizer, the waste desulfurization gypsum is changed into the hemihydrate gypsum, the waste of the land resource and the environmental pollution caused by the long-time stacking of the waste desulfurization gypsum are reduced, the recycling of the waste desulfurization gypsum is realized, and more economic value is created for the enterprise.

[0017] The front end of the first roller is upwardly curved and is arranged towards the feeding end of the conveying roller group, the first roller and the second roller are arranged in parallel, the bag opening of the bag body is opened by manual operation and is placed on the conveying roller group, the bottom of the bag body is towards the discharging end of the conveying roller group, and the bag opening is towards the feeding end of the conveying roller group, along with the continuous conveying of the conveying roller group, the bag body is forced to be in contact with the inclined first roller and the second roller, the first roller and the second roller are reversely rotated to clamp the bottom of the bag body and generate a tendency of moving upward relative to the conveying roller group, the first roller and the second roller also extrude the bag body, so that the desulfurization gypsum is discharged from the bag opening of the bag body, and the automatic pouring of the desulfurization gypsum is realized.

[0018] The discharging assembly discharges the emptied bag body to the outside of the conveying roller group, so that the bag body is prevented from falling into the mixer to pollute the desulfurization gypsum.

[0019] The cooperation of the transmission assembly and the separation driving assembly can realize the adjustment of the distance between the first roller and the second roller, and keep the continuity of the transmission, so that the first roller and the second roller can effectively clamp and extrude the bag body. When the first roller and the second roller are stuck with the bag body, the bag body can be smoothly taken down by adjusting the distance between the first roller and the second roller. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the application;

[0021] Figure 2 It is an assembly schematic view of the conveying roller group, the first roller, the second roller and the discharging assembly;

[0022] Figure 3 It is Figure 2 It is an enlarged schematic view of the local part A;

[0023] Figure 4 It is an assembly schematic view of the first roller and the second roller in the initial state;

[0024] Figure 5 It is a state schematic view of the separation driving assembly driving the second roller to translate.

[0025] Figure 6 A schematic diagram of the state of the bag body conveying on the conveying roller group;

[0026] Figure 7 A schematic diagram of the assembly of the mixer and the drying equipment;

[0027] Figure 8 A schematic diagram of the assembly of the pulverizer and the third elevator;

[0028] In the drawings, 1, frame, 2, conveying roller group, 3, mixer, 301, feed inlet, 4, drying equipment, 5, pulverizer, 6, collection equipment, 7, first roller, 8, second roller, 801, mounting plate, 9, bag body, 10, guide-out assembly, 1001, cover plate, 1002, first rotating shaft, 1003, conveying belt, 1003a, input section, 1003b, output section, 1004, input end, 1005, rubber wheel, 1006, second rotating shaft, 1007, transfer roller, 11, transmission assembly, 1101, driving wheel, 1102, driven wheel, 1103, intermediate transmission wheel, 12, separate driving assembly, 1201, telescopic rod, 1202, first connecting rod, 1203, second connecting rod, 1204, third connecting rod, 13, guide chute, 14, pit, 15, first elevator, 16, second elevator, 17, third elevator, 18, air pipe, 19, rotary gear, 20, driving handle. DETAILED DESCRIPTION

[0029] The application will be further described below in conjunction with the drawings and specific embodiments:

[0030] The specific embodiments are as shown in the drawings: Figure 1 、 Figure 2 The application relates to a power plant desulfurization gypsum recovery system, which comprises a frame 1, a conveying roller group 2, a mixer 3, a drying equipment 4, a pulverizer 5 and a collection equipment 6 which are sequentially arranged on the frame 1 along the conveying direction of the desulfurization gypsum, a feed inlet 301 of the mixer 3 is located below the discharge end of the conveying roller group 2, a first roller 7 and a second roller 8 are arranged above the discharge end of the conveying roller group 2, the horizontal projection of the axis of the first roller 7 is arranged in parallel with the conveying direction of the conveying roller group 2, the front end of the first roller 7 is upwardly curved and arranged towards the feed end of the conveying roller group 2, the first roller 7 is arranged in parallel with the second roller 8, and the gap between the first roller 7 and the second roller 8 forms an extrusion channel of a bag body 9; as Figure 6As shown, the bag opening of the bag 9 is opened by artificial and placed on the conveying roller group 2, the bottom of the bag 9 is towards the discharge end of the conveying roller group 2, the bag opening is towards the feeding end of the conveying roller group 2, the bottom of the bag 9 firstly passes the front end of the first roller 7 and the second roller 8, the first roller 7 and the second roller 8 are obliquely arranged to allow the bag 9 to enter between the first roller 7, the second roller 8 and the conveying roller group 2, with the continuous conveying of the conveying roller group 2, the bag 9 is forced to contact with the inclined first roller 7 and the second roller 8, the first roller 7 and the second roller 8 reversely rotate to clamp the bottom of the bag 9 and generate a tendency of upward movement of the bag 9 relative to the conveying roller group 2, the first roller 7 and the second roller 8 also extrude the bag 9, so that the desulfurization gypsum in the form of paste is discharged from the bag opening of the bag 9, and the desulfurization gypsum falls into the mixer 3 below through the gap on the conveying roller group 2, without manually lifting the bag 9 to pour the desulfurization gypsum in the bag 9, thereby effectively saving the labor cost.

[0031] On the other hand, due to the cooperation of the first roller 7, the second roller 8 and the conveying roller group 2, the position of the artificial operation is far away from the feeding port 301 of the mixer 3, thereby effectively avoiding the risk of falling into the mixer 3 by the operator by accident, and greatly improving the safety of the desulfurization gypsum recovery operation.

[0032] The upper side of the extrusion channel is also provided with a guide assembly 10 for guiding the bag 9 out of the conveying roller group 2, for discharging the empty bag 9 out of the conveying roller group 2, and preventing the bag 9 from falling into the mixer 3 to contaminate the desulfurization gypsum.

[0033] Preferably, the guide assembly 10 comprises a cover plate 1001, a first rotating shaft 1002 and a conveying belt 1003 arranged on the rack 1 respectively, the feeding end of the conveying belt 1003 and the first rotating shaft 1002 are located below the cover plate 1001, and the gap between the first rotating shaft 1002 and the conveying belt 1003 forms an input end 1004 of the guide assembly 10, and the input end 1004 is located above the extrusion channel. The conveying belt 1003 is divided into two sections along the conveying direction, including an input section 1003a and an output section 1003b, the input section 1003a and the output section 1003b are connected by a transfer roller 1007, and the feeding end 1003a of the input section and the output end of the output section 1003b are supported by a second rotating shaft 1006. The output section 1003b is interposed with the input section 1003a, preventing the conveying belt 1003 from being too long when arranged in one section and sagging under the pressure of the bag 9, thereby improving the stability of the conveying. On the other hand, the output section 1003b and the input section 1003a are both hollowly supported to the bag 9, that is, when the bag 9 is conveyed by the conveying belt 1003, the two sides of the bag 9 are overlapped on the conveying belt 1003, reducing the contact area between the bag 9 and the conveying belt 1003, preventing the bag 9 absorbing the water of the desulfurization gypsum from sticking to the conveying belt 1003, and ensuring that the bag 9 can smoothly fall from the output section 1003b to the outside of the conveying roller group 2.

[0034] The rotation direction of the first rotating shaft 1002 is opposite to that of the second rotating shaft 1006. Under the rotation of the first roller 7 and the second roller 8, the bag body 9 is extruded through the extrusion channel, and the residual desulfurized gypsum in the bag body 9 is in a sheet shape. The sheet-shaped bag body 9 moves upward and is overlapped on the conveying belt 1003. Under the friction of the conveying belt 1003, the bag body 9 is conveyed out of the conveying roller set 2. The cover plate 1001 is used to assist the bag body 9 to contact the conveying belt 1003 and be smoothly conveyed, and prevent the bag body 9 from falling out of the preset track. The desulfurized gypsum in the bag body 9 is extruded by extrusion, and the bag body 9 is conveyed out of the conveying roller set 2 by the conveying belt 1003, which can effectively reduce the damage of the bag body 9 and make the bag body 9 reusable.

[0035] The first rotating shaft 1002 is provided with a group of rubber wheels 1005, and the cover plate 1001 is overlapped on the rubber wheels 1005. The rubber wheels 1005 are arranged in gaps with the conveying belt 1003, and the rubber wheels 1005 are coaxially arranged with the first rotating shaft 1002. The first rotating shaft 1002 drives the rubber wheels 1005 to rotate. Since the friction coefficient of the rubber wheels 1005 is high, the bag body 9 can be effectively grabbed. The bag body 9 is in a sheet shape with a certain supportability under the action of the residual desulfurized gypsum, and the bag body 9 can vertically move upward to the input end 1004. The cover plate 1001 is overlapped on the rubber wheels 1005. Preferably, the rotation speed of the first rotating shaft 1002 is greater than that of the second rotating shaft 1006. The rubber wheels 1005 rapidly rotate to swing the bag body 9, which assists the bag body 9 to be overlapped on the conveying belt 1003 to realize the conveying of the bag body 9 by the conveying belt 1003.

[0036] As shown in Figure 4 The first roller 7 and the second roller 8 are drivingly connected by a transmission assembly 11. The transmission assembly 11 includes a driving wheel 1101 and a driven wheel 1102. The driving wheel 1101 is drivingly connected to the driven wheel 1102 by a pair of intermediate transmission wheels 1103. The driving wheel 1101 is fixedly connected to the first roller 7, and the driven wheel 1102 is fixedly connected to the second roller 8. The driving wheel 1101 drives the first roller 7 to rotate and transmits power to the second roller 8 to drive the second roller 8 to rotate. The rack 1 is also provided with a separate driving assembly 12 of the first roller 7 and the second roller 8. The separate driving assembly 12 includes an extension rod 1201, a first connecting rod 1202, a second connecting rod 1203, and a third connecting rod 1204. The intermediate transmission wheels 1103 are respectively installed at the two ends of the second connecting rod 1203 and have the freedom to rotate about their own axes. The driving wheel 1101 is installed on the first connecting rod 1202 and has the freedom to rotate about its own axis. The driven wheel 1102 is installed on the third connecting rod 1204 and has the freedom to rotate about its own axis. The first connecting rod 1202 and the third connecting rod 1204 are respectively hinged to the adjacent intermediate transmission wheels 1103.

[0037] The second link 1203 keeps the axial distance between the intermediate transmission wheels 1103 fixed, the first link 1202 keeps the axial distance between the driving wheel 1101 and its adjacent intermediate transmission wheel 1103 fixed, and the third link 1204 keeps the axial distance between the other intermediate transmission wheel 1103 and the driven wheel 1102 fixed. That is, the driving wheel 1101, the two intermediate transmission wheels 1103, and the driven wheel 1102 are always meshed in sequence, so that the power of the driving wheel 1101 can be smoothly transmitted to the driven wheel 1102.

[0038] Driven wheel 1102, driven by the telescopic end of telescopic rod 1201, has the freedom to translate on frame 1. The direction of translation of driven wheel 1102 is perpendicular to its own axis, thereby realizing the adjustment of the distance between driving wheel 1101 and driven wheel 1102, that is, the adjustment of the distance between first roller 7 and second roller 8, which facilitates effective clamping and squeezing of bag 9. On the other hand, when first roller 7 and second roller 8 jam with bag 9, bag 9 can be easily removed by adjusting the distance between first roller 7 and second roller 8.

[0039] Specifically, the mounting plate 801 is connected to both ends of the second roller 8. The second roller 8 has the freedom to rotate on the mounting plate 801. Telescopic rods 1201 are respectively provided at both ends of the second roller 8, and the telescopic ends of the telescopic rods 1201 are fixedly connected to the mounting plate 801. The other end of the telescopic rod 1201 is a threaded rod. Figure 2 , Figure 3 As shown, a pair of rotating gears 19 driven by a chain are mounted on the frame 1. One of the rotating gears 19 is equipped with a drive handle 20. Both rotating gears 19 have the freedom to rotate around their own axes on the frame 1, driven by the drive handle 20 and the chain. Internal threaded sleeves are coaxially mounted on the rotating gears 19. The threaded rods on the two telescopic rods 1201 are screwed into the internal threaded sleeves on the two rotating gears 19, respectively. The axial direction of the telescopic rods 1201 is perpendicular to the second roller 8. The frame 1 is also equipped with guide grooves 13 that match the mounting plate 801. In the stopped state, the operator uses the drive handle 20 to rotate the rotating gears 19 clockwise or counterclockwise, thereby driving the telescopic ends of the telescopic rods 1201 at both ends of the second roller 8 to extend or retract, thus pushing or pulling the mounting plate 801 on which the second roller 8 is connected, adjusting the distance between the second roller 8 and the first roller 7.

[0040] like Figure 5 As shown, by the contraction of the telescopic end of the telescopic rod 1201, the mounting plate 801 carries the second roller 8 away from the first roller 7 along the guiding direction of the guide groove 13. The guiding effect of the guide groove 13 helps to improve the motion accuracy of the second roller 8.

[0041] Preferred, such asFigure 7 As shown, the lower end of the mixer 3 is arranged in the pit 14, which is a pit dug downward from the ground, and the arrangement of the pit 14 reduces the height of the feeding port 301 of the mixer 3, and further reduces the setting height of the conveying roller set 2, and reduces the difficulty of carrying the bag body 9 filled with desulfurized gypsum to the conveying roller set 2. The mixer 3 is connected with the drying device 4 by means of the first elevator 15, the drying device 4 is connected with the crusher 5 by means of the second elevator 16, and the crusher 5 is connected with the collecting device 6 by means of the third elevator 17.

[0042] Preferably, the first elevator 15 is a screw conveyor, the drying device 4 includes a drying machine and a rotary kiln, the desulfurized gypsum is pre-dried by the drying machine, and the pre-dried desulfurized gypsum is calcined by the rotary kiln, wherein the drying machine is arranged between the discharging end of the first elevator 15 and the rotary kiln. The mixer 3 stirs and mixes the desulfurized gypsum, which helps the desulfurized gypsum to be dried uniformly; the screw conveyor conveys the stirred desulfurized gypsum to the conveying belt, and the desulfurized gypsum is sequentially dried and calcined by the drying machine and the rotary kiln through the conveying belt to form hemihydrate gypsum; the hemihydrate gypsum on the conveying belt is a hard flaky object with a flat bottom; at the discharging end of the conveying belt, the conveying belt is bent in the opposite direction of its conveying direction, the flaky hemihydrate gypsum is broken and automatically separated from the conveying belt and falls onto the second elevator 16. As shown, Figure 8 The second elevator 16 conveys the hemihydrate gypsum to the crusher 5, and the crusher 5 crushes the hemihydrate gypsum into powder, improving its applicability as building materials and increasing its recycling value.

[0043] The collecting device 6 can be a bagging machine, which can directly sub-pack the crushed hemihydrate gypsum.

[0044] The air outlet of the drying device 4 is connected with an air purification device through an air pipe 18, the air purification device includes a dust remover and a spray tower arranged in sequence along the air flow direction, and the dust remover and the spray tower are used for dust removal and purification of the gas discharged from the drying device 4, so that the gas can be discharged after meeting the emission standard, meeting the requirements of environmental protection emission.

[0045] The present application relates to a power plant desulfurized gypsum recycling system, which realizes automatic dumping of desulfurized gypsum and converts waste desulfurized gypsum into hemihydrate gypsum, reduces the waste of land resources and environmental pollution caused by long-term stacking of waste desulfurized gypsum, and also realizes recycling of waste desulfurized gypsum, creating more economic value for enterprises.

Claims

1. A power plant desulfurization gypsum recovery system, characterized by: The device comprises a frame (1), a conveying roller group (2) arranged on the frame (1) in sequence along the conveying direction of desulfurized gypsum, a mixer (3), a drying device (4), a pulverizer (5) and a collecting device (6), the feeding port (301) of the mixer (3) is located below the discharging end of the conveying roller group (2), a first roller (7) and a second roller (8) are arranged above the discharging end of the conveying roller group (2), the horizontal projection of the axis of the first roller (7) is arranged in parallel with the conveying direction of the conveying roller group (2), the front end of the first roller (7) is upturned and arranged towards the feeding end of the conveying roller group (2), the first roller (7) is arranged in parallel with the second roller (8), the gap between the first roller (7) and the second roller (8) forms an extrusion channel of a bag (9), and a guide-out assembly (10) for guiding the bag (9) out of the conveying roller group (2) is further arranged above the extrusion channel.

2. A power plant desulfurization gypsum recovery system as claimed in claim 1, characterized in that: The guide-out assembly (10) comprises a cover plate (1001), a first rotating shaft (1002) and a conveying belt (1003) arranged on the frame (1) respectively, the feeding end of the conveying belt (1003) and the first rotating shaft (1002) are located below the cover plate (1001) respectively, the gap between the first rotating shaft (1002) and the conveying belt (1003) forms an input end (1004) of the guide-out assembly (10), and the input end (1004) is located above the extrusion channel.

3. A power plant desulfurization gypsum recovery system according to claim 2, characterized in that: A group of rubber wheels (1005) are arranged on the first rotating shaft (1002), the cover plate (1001) is overlapped on the rubber wheels (1005), and the rubber wheels (1005) are arranged in gaps with the conveying belt (1003).

4. A power plant desulfurization gypsum recovery system according to claim 3, characterized in that: The conveying belt (1003) is divided into two sections along the conveying direction, including an input section (1003a) and an output section (1003b), the input section (1003a) and the output section (1003b) are connected by a transfer roller (1007), and the feeding end (1003a) of the input section and the output end of the output section (1003b) are supported by a second rotating shaft (1006) respectively.

5. A power plant desulfurization gypsum recovery system according to claim 1, characterized in that: The first roller (7) and the second roller (8) are drivingly connected by a transmission assembly (11), the transmission assembly (11) comprises a driving wheel (1101) and a driven wheel (1102), the driving wheel (1101) is drivingly connected with the driven wheel (1102) by a pair of intermediate transmission wheels (1103), the driving wheel (1101) is fixedly connected with the first roller (7), the driven wheel (1102) is fixedly connected with the second roller (8), the rack (1) is further provided with a separate driving assembly (12) of the first roller (7) and the second roller (8), the separate driving assembly (12) comprises a telescopic rod (1201), a first connecting rod (1202), a second connecting rod (1203) and a third connecting rod (1204), the intermediate transmission wheels (1103) are respectively installed at two ends of the second connecting rod (1203), the driving wheel (1101) is installed on the first connecting rod (1202), the driven wheel (1102) is installed on the third connecting rod (1204), the first connecting rod (1202) and the third connecting rod (1204) are respectively hinged with the adjacent intermediate transmission wheels (1103), the fixed end of the telescopic rod (1201) is connected with the rack (1), the driven wheel (1102) has the freedom of translation on the rack (1) by the driving of the telescopic end of the telescopic rod (1201).

6. A power plant desulfurization gypsum recovery system according to claim 5, characterized in that: The telescopic end of the telescopic rod (1201) is connected with the mounting plate (801) of the second roller (8), the second roller (8) has the freedom of rotation on the mounting plate (801), the rack (1) is provided with a guide sliding groove (13) matched with the mounting plate (801).

7. A power plant desulfurization gypsum recovery system according to claim 6, characterized in that: The telescopic end of the telescopic rod (1201) is fixedly connected with the mounting plate (801), the other end of the telescopic rod (1201) is a threaded rod, the rack (1) is provided with a rotating gear (19), the rotating gear (19) has the freedom of rotation on the rack (1) around its own axis by the driving of a driving handle (20), the rotating gear (19) is coaxially provided with an internal thread sleeve, the threaded rod is screw-coupled with the internal thread sleeve, the axial direction of the telescopic rod (1201) is perpendicular to the second roller (8).

8. A power plant desulfurization gypsum recovery system according to claim 1, characterized in that: The lower end of the blender (3) is arranged in a pit (14), the blender (3) is connected with the drying device (4) by a first lifting machine (15), the drying device (4) is connected with the pulverizer (5) by a second lifting machine (16), the pulverizer (5) is connected with the collecting device (6) by a third lifting machine (17).

9. A power plant desulfurization gypsum recovery system according to claim 1, characterized in that: The air outlet of the drying device (4) is connected with an air purification device by an air pipe (18), the air purification device comprises a dust remover and a spray tower arranged in sequence along the air flow direction.

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