Dehydrating and drying device for desulfurized gypsum in power plant

Abstract

The invention discloses a power plant desulfurization gypsum dewatering and drying device, and relates to the technical field of desulfurization gypsum dewatering and drying. Comprising a bottom plate, a shell is fixed to the top face of the bottom plate, a drying structure is arranged in the shell, and a dewatering structure is arranged on the top face of the shell. Through the arrangement of a dehydration structure and a drying structure, a vacuum pump extracts air in a dehydration box, the inner bottom surface of a conveying groove is of a hollow structure, gypsum in the conveying groove is affected by negative pressure, water enters the dehydration box through filter cloth, a second motor drives a lead screw to rotate to enable a push plate to move, and the dehydrated gypsum is pushed into a crushing box; dehydrated gypsum enters the drying tank through the crushing box and the feeding pipe, hot air enters the drying tank through the air pipe, the hot air dries the dehydrated gypsum while the drying tank rotates and throws the gypsum, in this way, workers can conveniently and rapidly dry the gypsum, meanwhile, gypsum dehydration and drying are integrated, and the gypsum drying efficiency is improved. The dehydrating and drying efficiency of the desulfurized gypsum is improved.

Description

Technical Field

[0001] The invention relates to the technical field of desulfurized gypsum dehydration and drying, in particular to a desulfurized gypsum dehydration and drying device for a power plant. Background Art

[0002] In the process of flue gas desulfurization in thermal power plants and other coal-fired power plants, a large amount of byproduct, desulfurized gypsum, is produced. The main component of desulfurized gypsum is calcium sulfate dihydrate (CaSO4·2H2O), which usually contains a high amount of water. The moisture content of untreated desulfurized gypsum can reach 10% to 15%. In order to realize resource utilization and reduce transportation and storage costs, it must be dehydrated and dried.

[0003] A dehydration and drying device for producing desulfurized gypsum powder (Announcement No.: CN215983699U) has at least the following disadvantages: the hot air is discharged outward from multiple exhaust pipes below through the channel set in the above device, and can appear more evenly in the cylinder, so that the gypsum powder in the cylinder can be evenly dehydrated and dried. However, when drying gypsum powder with a high water content, since the gypsum powder particles are small and easy to absorb moisture, it takes a long time to dry only by hot air, resulting in low gypsum drying efficiency. Therefore, the present invention is proposed. Summary of the invention

[0004] The object of the present invention is to provide a desulfurization gypsum dehydration and drying device for a power plant to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a desulfurization gypsum dehydration and drying device for a power plant, comprising.

[0006] Compared with the prior art, the present invention has the following beneficial effects:

[0007] A desulfurized gypsum dehydration and drying device for a power plant comprises a bottom plate, a shell is fixed on the top surface of the bottom plate, a drying structure is arranged inside the shell, a dehydration structure is arranged on the top surface of the shell, the drying structure comprises a drying tank rotatably arranged inside the shell, a sealing plate is rotatably arranged at one end of the drying tank, an air duct is connected and fixed to one side of the sealing plate, a feed pipe is connected and fixed to one side of the sealing plate, and a crushing box is fixed to the top of the feed pipe.

[0008] Preferably, an outer toothed ring is fixed on the outer circumferential wall of the drying tank, a first gear is meshed on the outer circumferential wall of the outer toothed ring, a first motor is fixed on the top surface of the bottom plate, and an output end of the first motor is fixed to the first gear.

[0009] Preferably, a dehydration box is fixed on the top surface of the shell, a conveying trough is opened on the top surface of the dehydration box, the bottom surface of the conveying trough is a hollow structure, a filter cloth is fixed inside the conveying trough, a vacuum pump is connected and fixed to one side of the dehydration box, the vacuum pump is fixed to the top surface of the shell, a push plate is slidably arranged inside the conveying trough, the push plate corresponds to the internal shape of the conveying trough, a screw rod is rotatably arranged on the top surface of the dehydration box, the screw rod is threadedly connected to the push plate, a second motor is fixed to one side of the dehydration box, the output end of the second motor is fixed to one end of the screw rod, an inclined plate is fixed to one side of the dehydration box, and the bottom end of the inclined plate is located above the crushing box.

[0010] Preferably, a movable ring is rotatably provided at one end of the drying tank, a collecting shell is fixed to one side of the movable ring by bolts, and a filter bag is fixed inside the collecting shell.

[0011] Preferably, a plurality of air holes are provided on the outer wall surface of the collecting shell, and a discharge pipe is connected and fixed to one side of the collecting shell, and the discharge pipe is connected and fixed to the filter bag.

[0012] Preferably, one side of the dehydration box is connected and fixed with a drain pipe, and one end of the drain pipe is connected and fixed with a valve.

[0013] Preferably, an intercepting plate is slidably inserted inside the conveying trough, a fixing ring is fixed on the top surface of the intercepting plate, a locking rod is slidably inserted inside the fixing ring, and two limiting rings are fixed on the top surface of the dehydration box, and the locking rod and the limiting ring are slidably inserted inside.

[0014] Preferably, two toothed rollers are rotatably arranged inside the crushing box, a second gear is fixed at one end of each toothed roller, the two second gears are meshed with each other, a third motor is fixed at one side of the crushing box, and the output end of the third motor is fixed to the other end of the toothed roller on the right side.

[0015] Preferably, spiral blades are fixed inside the drying tank.

[0016] Preferably, an anti-slip ring is fixed to the outer circumferential wall surface of the sealing plate, and a limiting groove is provided at one end of the drying tank.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The dehydration and drying device, through the arrangement of the dehydration structure and the drying structure, the vacuum pump extracts the air inside the dehydration box, the air inside the dehydration box is reduced to form a negative pressure, because the inner bottom surface of the conveying trough is a hollow structure, the gypsum in the conveying trough is affected by the negative pressure, and its internal moisture passes through the filter cloth into the dehydration box, so as to dehydrate the gypsum with a high moisture content, the second motor drives the screw rod to rotate, the rotation of the screw rod drives the push plate to move, and the push plate pushes the dehydrated gypsum into the crushing box when moving, and the dehydrated gypsum enters the drying tank through the crushing box and the feeding pipe, the first motor drives the drying tank to rotate through the first gear and the outer gear ring, and at the same time, the staff connects the hot air blower to the air duct so that the hot air enters the drying tank through the air duct, and when the drying tank rotates to scatter the gypsum, the hot air enters the drying tank to dry the dehydrated gypsum;

[0019] Through the above method, the moisture content of gypsum is reduced after dehydration treatment, which makes it easier for workers to quickly dry the gypsum. At the same time, gypsum dehydration and drying are integrated to improve the desulfurization gypsum dehydration and drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a schematic diagram of the split structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the split structure of the shell of the present invention.

[0023] Figure 4 It is a schematic diagram of the split structure of the drying tank of the present invention.

[0024] Figure 5 It is a schematic diagram of the split structure at the collecting shell of the present invention.

[0025] Figure 6 It is a schematic diagram of the split structure of the push plate of the present invention.

[0026] Figure 7 It is a schematic diagram of the split structure of the dehydration box of the present invention.

[0027] In the figure: 1. bottom plate; 2. shell; 201. drying tank; 202. blocking plate; 203. air duct; 204. feed pipe; 205. crushing box; 206. outer gear ring; 207. first gear; 3. dehydration box; 301. conveying trough; 302. filter cloth; 303. vacuum pump; 304. push plate; 305. screw rod; 306. inclined plate; 4. movable ring; 401. collecting shell; 402. filter bag; 5. air vent; 501. discharge pipe; 6. drain pipe; 601. valve; 7. interception plate; 701. fixing ring; 702. locking rod; 703. limiting ring; 8. gear roller; 801. second gear; 9. spiral blade; 901. anti-slip ring; 902. limiting groove. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figure 1-Figure 7 As shown, the present invention provides a technical solution: a desulfurization gypsum dehydration and drying device for a power plant, comprising a base plate 1, a shell 2 is fixed on the top surface of the base plate 1, a drying structure is arranged inside the shell 2, a dehydration structure is arranged on the top surface of the shell 2, the drying structure comprises a drying tank 201 rotatably arranged inside the shell 2, a sealing plate 202 is rotatably arranged at one end of the drying tank 201, an air duct 203 is connected and fixed to one side of the sealing plate 202, a feed pipe 204 is connected and fixed to one side of the sealing plate 202, and a crushing box 205 is fixed to the top of the feed pipe 204.

[0030] In the embodiment, an outer toothed ring 206 is fixed to the outer circumferential wall of the drying tank 201 , a first gear 207 is meshed with the outer circumferential wall of the outer toothed ring 206 , a first motor is fixed to the top surface of the bottom plate 1 , and an output end of the first motor is fixed to the first gear 207 .

[0031] In the embodiment, a dehydration box 3 is fixed on the top surface of the shell 2, a conveying groove 301 is opened on the top surface of the dehydration box 3, the bottom surface of the conveying groove 301 is a hollow structure, a filter cloth 302 is fixed inside the conveying groove 301, a vacuum pump 303 is connected and fixed on one side of the dehydration box 3, the vacuum pump 303 is fixed to the top surface of the shell 2, a push plate 304 is slidably arranged inside the conveying groove 301, the push plate 304 corresponds to the internal shape of the conveying groove 301, a screw rod 305 is rotatably arranged on the top surface of the dehydration box 3, and the screw rod 305 is screwed with the push plate 304 A second motor is fixed to one side of the dehydration box 3, and the output end of the second motor is fixed to one end of the screw rod 305. An inclined plate 306 is fixed to one side of the dehydration box 3, and the bottom end of the inclined plate 306 is located above the crushing box 205. Through the setting of the drying structure and the dehydration structure, the staff puts the desulfurized gypsum with high moisture content into the filter cloth 302 in the conveying trough 301, and starts the vacuum pump 303. The vacuum pump 303 extracts the air inside the dehydration box 3, and the air inside the dehydration box 3 is reduced to form a negative pressure. Since the inner bottom surface of the conveying trough 301 is hollow The empty structure makes the gypsum in the conveying trough 301 affected by negative pressure, and its internal moisture penetrates the filter cloth 302 into the dehydration box 3, so as to pre-treat the gypsum with high moisture content by dehydration. After the gypsum is dehydrated, the staff starts the second motor to drive the screw rod 305 to rotate, and the screw rod 305 rotates to drive the push plate 304 to move. When the push plate 304 moves, it pushes the dehydrated gypsum onto the inclined plate 306 and slides into the crushing box 205. The dehydrated gypsum enters the drying tank 201 through the crushing box 205 and the feeding pipe 204, and the first motor is started. The motor drives the drying tank 201 to rotate through the first gear 207 and the outer gear ring 206. At the same time, the staff connects the hot air blower to the air duct 203, so that the hot air enters the drying tank 201 through the air duct 203. When the drying tank 201 rotates to scatter the gypsum, the hot air enters the drying tank 201 to dry the dehydrated gypsum. In the above manner, the moisture content of the gypsum is reduced after dehydration, which is convenient for the staff to quickly dry the gypsum. At the same time, the dehydration and drying of the gypsum are integrated, thereby improving the dehydration and drying efficiency of the desulfurized gypsum.

[0032] In the embodiment, a movable ring 4 is rotatably provided at one end of the drying tank 201, a collecting shell 401 is fixed to one side of the movable ring 4 by bolts, a filter bag 402 is fixed inside the collecting shell 401, and when the drying tank 201 dries the gypsum, gypsum dust is generated by the hot air, and the gypsum dust enters the collecting shell 401 downward through the hot air flow and is collected by the filter bag 402.

[0033] In the embodiment, a plurality of air holes 5 are provided on the outer wall surface of the collecting shell 401, and an exhaust pipe 501 is connected and fixed to one side of the collecting shell 401, and the exhaust pipe 501 is connected and fixed to the filter bag 402. When the filter bag 402 collects gypsum dust, the collected dust is discharged through the exhaust pipe 501. At the same time, the air holes 5 on the outer wall of the collecting shell 401 can discharge the hot air entering the collecting shell 401.

[0034] In the embodiment, a drain pipe 6 is connected and fixed to one side of the dehydration box 3, and a valve 601 is connected and fixed to one end of the drain pipe 6. When the gypsum with a high moisture content is dehydrated, moisture is stored in the dehydration box 3. When a certain amount of moisture is stored, the staff opens the valve 601 and the water is discharged from the drain pipe 6.

[0035] In the embodiment, an intercepting plate 7 is slidably inserted into the interior of the conveying trough 301, a fixing ring 701 is fixed on the top surface of the intercepting plate 7, a locking rod 702 is slidably inserted into the interior of the fixing ring 701, and two limiting rings 703 are fixed on the top surface of the dehydration box 3, the locking rod 702 and the limiting ring 703 are slidably inserted into the interior, when the staff pours gypsum with high water content into the conveying trough 301, the intercepting plate 7 intercepts the gypsum in the conveying trough 301 to prevent the undehydrated gypsum from flowing out, after the gypsum is dehydrated, the staff can pull out the locking rod 702 from the fixing ring 701 and the limiting ring 703 and pull out the intercepting plate 7, so that the dehydrated gypsum can be discharged from the conveying trough 301.

[0036] In the embodiment, two toothed rollers 8 are provided for internal rotation of the crushing box 205, and a second gear 801 is fixed at one end of the two toothed rollers 8, and the two second gears 801 are meshed with each other. A third motor is fixed to one side of the crushing box 205, and the output end of the third motor is fixed to the other end of the toothed roller 8 on the right side. The toothed roller 8 is the prior art, and the dehydrated gypsum is in a hardened state. When the dehydrated gypsum enters the crushing box 205, the third motor drives the two toothed rollers 8 to rotate in opposite directions through the two second gears 801, so as to crush the dehydrated gypsum. The crushed gypsum enters the drying tank 201 for drying, thereby improving the gypsum drying effect.

[0037] In the embodiment, spiral blades 9 are fixed inside the drying tank 201. When gypsum enters the drying tank 201, the drying tank 201 rotates forward so that the gypsum inside is stirred and scattered under the action of the spiral blades 9. When the drying tank 201 rotates reversely, the gypsum inside is discharged by the spiral blades 9.

[0038] In the embodiment, an anti-slip ring 901 is fixed to the outer circular wall surface of the sealing plate 202, a limiting groove 902 is provided at one end of the drying tank 201, and the anti-slip ring 901 and the limiting groove 902 are arranged to rotate inside. When the drying tank 201 rotates, the sealing plate 202 does not rotate with the drying tank 201. At the same time, the coordination of the anti-slip ring 901 and the limiting groove 902 can prevent the sealing plate 202 from falling out.

[0039] Working principle: the staff puts the desulfurized gypsum with high moisture content on the filter cloth 302 in the conveying trough 301, starts the vacuum pump 303, and the vacuum pump 303 extracts the air inside the dehydration box 3. The air inside the dehydration box 3 is reduced to form a negative pressure. Since the inner bottom surface of the conveying trough 301 is a hollow structure, the gypsum in the conveying trough 301 is affected by the negative pressure, and its internal moisture penetrates the filter cloth 302 into the dehydration box 3, so as to pre-treat the gypsum with high moisture content. After the gypsum is dehydrated, the staff starts the second motor to drive the screw rod 305 to rotate, and the rotation of the screw rod 305 drives the push plate 304 to move. When the push plate 304 moves, it pushes the dehydrated gypsum onto the inclined plate 306 and slides into the crushing box. 205, the dehydrated gypsum enters the drying tank 201 through the crushing box 205 and the feeding pipe 204, the first motor is started, and the first motor drives the drying tank 201 to rotate through the first gear 207 and the outer gear ring 206. At the same time, the staff connects the hot air blower to the air duct 203, so that the hot air enters the drying tank 201 through the air duct 203. When the drying tank 201 rotates to scatter the gypsum, the hot air enters the drying tank 201 to dry the dehydrated gypsum. When the drying tank 201 dries the gypsum, gypsum dust is generated by the hot air. The gypsum dust enters the collection shell 401 downward through the hot air flow and is collected by the filter bag 402. The filter bag 402 collects the gypsum dust When the gypsum with high water content is dehydrated, the water is stored in the dehydration box 3. When a certain amount of water is stored, the staff opens the valve 601, and the water flows out from the drain pipe 6. When the staff pours the gypsum with high water content into the conveying trough 301, the interception plate 7 intercepts the gypsum in the conveying trough 301 to prevent the undehydrated gypsum from flowing out. After the gypsum is dehydrated, the staff can pull out the locking rod 702 from the fixing ring 701 and the limiting ring 703 and pull out the interception plate 7, so that the dehydrated gypsum can be discharged from the conveying trough 301. When the dehydrated gypsum enters the crushing box 205, the third motor drives the two gear rollers 8 to rotate in opposite directions through the transmission of the two second gears 801, so as to crush the dehydrated gypsum. The crushed gypsum enters the drying tank 201 for drying, thereby improving the gypsum drying effect. When the gypsum enters the drying tank 201, the drying tank 201 rotates forward so that the gypsum inside is stirred and scattered under the action of the spiral blades 9. When the drying tank 201 is reversed, the gypsum inside is discharged by the spiral blades 9. When the drying tank 201 is rotating, the blocking plate 202 does not rotate with the drying tank 201. At the same time, the matching arrangement of the anti-slip ring 901 and the limiting groove 902 can prevent the blocking plate 202 from falling out.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A desulfurization gypsum dehydration and drying device for a power plant, comprising a bottom plate (1), characterized in that: A shell (2) is fixed on the top surface of the bottom plate (1), a drying structure is arranged inside the shell (2), a dehydration structure is arranged on the top surface of the shell (2), the drying structure comprises a drying tank (201) rotatably arranged inside the shell (2), a sealing plate (202) is rotatably arranged at one end of the drying tank (201), an air duct (203) is connected and fixed to one side of the sealing plate (202), a feed pipe (204) is connected and fixed to one side of the sealing plate (202), and a crushing box (205) is fixed to the top of the feed pipe (204).

2. A desulfurization gypsum dehydration and drying device for a power plant according to claim 1, characterized in that: An outer toothed ring (206) is fixed on the outer circumferential wall surface of the drying tank (201), a first gear (207) is meshed on the outer circumferential wall surface of the outer toothed ring (206), a first motor is fixed on the top surface of the bottom plate (1), and an output end of the first motor is fixed to the first gear (207).

3. A desulfurization gypsum dehydration and drying device for a power plant according to claim 2, characterized in that: A dehydration box (3) is fixed on the top surface of the shell (2), a conveying groove (301) is provided on the top surface of the dehydration box (3), the bottom surface of the conveying groove (301) is a hollow structure, a filter cloth (302) is fixed inside the conveying groove (301), a vacuum pump (303) is connected and fixed to one side of the dehydration box (3), the vacuum pump (303) is fixed to the top surface of the shell (2), and a push plate (304) is slidably provided inside the conveying groove (301), The push plate (304) corresponds to the internal shape of the conveying trough (301), a screw rod (305) is rotatably arranged on the top surface of the dewatering box (3), the screw rod (305) is threadedly connected to the push plate (304), a second motor is fixed to one side of the dewatering box (3), the output end of the second motor is fixed to one end of the screw rod (305), an inclined plate (306) is fixed to one side of the dewatering box (3), and the bottom end of the inclined plate (306) is located above the crushing box (205).

4. A desulfurization gypsum dehydration and drying device for a power plant according to claim 3, characterized in that: A movable ring (4) is rotatably provided at one end of the drying tank (201), a collecting shell (401) is fixed to one side of the movable ring (4) by bolts, and a filter bag (402) is fixed inside the collecting shell (401).

5. A desulfurization gypsum dehydration and drying device for a power plant according to claim 4, characterized in that: The outer wall surface of the collection shell (401) is provided with a plurality of air holes (5), and a discharge pipe (501) is connected and fixed to one side of the collection shell (401), and the discharge pipe (501) is connected and fixed to the filter bag (402).

6. A desulfurization gypsum dehydration and drying device for a power plant according to claim 5, characterized in that: One side of the dehydration box (3) is connected and fixed with a drainage pipe (6), and one end of the drainage pipe (6) is connected and fixed with a valve (601).

7. A desulfurization gypsum dehydration and drying device for a power plant according to claim 6, characterized in that: An intercepting plate (7) is slidably inserted inside the conveying trough (301), a fixing ring (701) is fixed on the top surface of the intercepting plate (7), a locking rod (702) is slidably inserted inside the fixing ring (701), and two limiting rings (703) are fixed on the top surface of the dehydration box (3), and the locking rod (702) and the limiting ring (703) are slidably inserted inside.

8. A desulfurization gypsum dehydration and drying device for a power plant according to claim 7, characterized in that: The crushing box (205) is internally rotatably provided with two toothed rollers (8), one end of each of the two toothed rollers (8) is fixed with a second gear (801), the two second gears (801) are meshed with each other, and a third motor is fixed on one side of the crushing box (205), the output end of the third motor is fixed to the other end of the toothed roller (8) on the right side.

9. A desulfurization gypsum dehydration and drying device for a power plant according to claim 8, characterized in that: A spiral blade (9) is fixed inside the drying tank (201).

10. A desulfurization gypsum dehydration and drying device for a power plant according to claim 9, characterized in that: An anti-slip ring (901) is fixed to the outer circumferential wall surface of the blocking plate (202), and a limiting groove (902) is provided at one end of the drying tank (201).

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